uaac.h

/* RPSL Simple, Minimalistic, AAC decoder
 *	©2018-2022 Yuichiro Nakada
 *
 * Basic usage:
 *	file_data = uaac_extract_aac(fd, &bytes_left, &samplerate, &channels);
 *
 *	AACFrameInfo info;
 *	memset(&info, 0, sizeof(AACFrameInfo));
 *	info.nChans = channels;
 *	info.sampRateCore = samplerate;
 *	info.profile = AAC_PROFILE_LC;
 *	HAACDecoder aac = AACInitDecoder();
 *	AACSetRawBlockParams(aac, 0, &info);
 *
 *	int r = AACDecode(aac, &file_data, &bytes_left, sample_buf);
 * */

#ifndef uint16_t
//typedef unsigned short int uint16_t;
#include <stdint.h>
#endif


/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: assembly.h,v 1.7 2005/11/10 00:04:40 margotm Exp $ 
 *   
 * Portions Copyright (c) 1995-2005 RealNetworks, Inc. All Rights Reserved.  
 *       
 * The contents of this file, and the files included with this file, 
 * are subject to the current version of the RealNetworks Public 
 * Source License (the "RPSL") available at 
 * https://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the current version of the RealNetworks Community 
 * Source License (the "RCSL") available at 
 * https://www.helixcommunity.org/content/rcsl, in which case the RCSL 
 * will apply. You may also obtain the license terms directly from 
 * RealNetworks.  You may not use this file except in compliance with 
 * the RPSL or, if you have a valid RCSL with RealNetworks applicable 
 * to this file, the RCSL.  Please see the applicable RPSL or RCSL for 
 * the rights, obligations and limitations governing use of the 
 * contents of the file. 
 *   
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the 
 * portions it created. 
 *   
 * This file, and the files included with this file, is distributed 
 * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY 
 * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS 
 * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES 
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET 
 * ENJOYMENT OR NON-INFRINGEMENT. 
 *  
 * Technology Compatibility Kit Test Suite(s) Location:  
 *    https://www.helixcommunity.org/content/tck  
 *  
 * Contributor(s):  
 *   
 * ***** END LICENSE BLOCK ***** */  

/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * assembly.h - inline assembly language functions and prototypes
 *
 * MULSHIFT32(x, y) 		signed multiply of two 32-bit integers (x and y), 
 *                            returns top 32-bits of 64-bit result
 * CLIPTOSHORT(x)			convert 32-bit integer to 16-bit short, 
 *                            clipping to [-32768, 32767]
 * FASTABS(x)               branchless absolute value of signed integer x
 * CLZ(x)                   count leading zeros on signed integer x
 * MADD64(sum64, x, y)		64-bit multiply accumulate: sum64 += (x*y)
 **************************************************************************************/

#ifndef _ASSEMBLY_H
#define _ASSEMBLY_H

/* toolchain:           MSFT Visual C++
 * target architecture: x86
 */
#if (defined (_WIN32) && !defined (_WIN32_WCE)) || (defined (__WINS__) && defined (_SYMBIAN)) || (defined (WINCE_EMULATOR)) || (defined (_OPENWAVE_SIMULATOR))

#pragma warning( disable : 4035 )	/* complains about inline asm not returning a value */

static __inline int MULSHIFT32(int x, int y)	
{
    __asm {
		mov		eax, x
	    imul	y
	    mov		eax, edx
	    }
}

static __inline short CLIPTOSHORT(int x)
{
	int sign;

	/* clip to [-32768, 32767] */
	sign = x >> 31;
	if (sign != (x >> 15))
		x = sign ^ ((1 << 15) - 1);

	return (short)x;
}

static __inline int FASTABS(int x) 
{
	int sign;

	sign = x >> (sizeof(int) * 8 - 1);
	x ^= sign;
	x -= sign;

	return x;
}

static __inline int CLZ(int x)
{
	int numZeros;

	if (!x)
		return 32;

	/* count leading zeros with binary search */
	numZeros = 1;
	if (!((unsigned int)x >> 16))	{ numZeros += 16; x <<= 16; }
	if (!((unsigned int)x >> 24))	{ numZeros +=  8; x <<=  8; }
	if (!((unsigned int)x >> 28))	{ numZeros +=  4; x <<=  4; }
	if (!((unsigned int)x >> 30))	{ numZeros +=  2; x <<=  2; }

	numZeros -= ((unsigned int)x >> 31);

	return numZeros;
}

#ifdef __CW32__
typedef long long Word64;
#else
typedef __int64 Word64;
#endif

typedef union _U64 {
	Word64 w64;
	struct {
		/* x86 = little endian */
		unsigned int lo32; 
		signed int   hi32;
	} r;
} U64;

/* returns 64-bit value in [edx:eax] */
static __inline Word64 MADD64(Word64 sum64, int x, int y)
{
#if (defined (_SYMBIAN_61_) || defined (_SYMBIAN_70_)) && defined (__WINS__) && !defined (__CW32__)
/* Workaround for the Symbian emulator because of non existing longlong.lib and
 * hence __allmul not defined. */
    __asm {
        mov     eax, x
        imul    y
        add     dword ptr sum64, eax
        adc     dword ptr sum64 + 4, edx
    }
#else
    sum64 += (Word64)x * (Word64)y;
#endif

    return sum64;
}

/* toolchain:           MSFT Embedded Visual C++
 * target architecture: ARM v.4 and above (require 'M' type processor for 32x32->64 multiplier)
 */
#elif defined (_WIN32) && defined (_WIN32_WCE) && defined (ARM)

static __inline short CLIPTOSHORT(int x)
{
	int sign;

	/* clip to [-32768, 32767] */
	sign = x >> 31;
	if (sign != (x >> 15))
		x = sign ^ ((1 << 15) - 1);

	return (short)x;
}

static __inline int FASTABS(int x) 
{
	int sign;

	sign = x >> (sizeof(int) * 8 - 1);
	x ^= sign;
	x -= sign;

	return x;
}

static __inline int CLZ(int x)
{
	int numZeros;

	if (!x)
		return 32;

	/* count leading zeros with binary search (function should be 17 ARM instructions total) */
	numZeros = 1;
	if (!((unsigned int)x >> 16))	{ numZeros += 16; x <<= 16; }
	if (!((unsigned int)x >> 24))	{ numZeros +=  8; x <<=  8; }
	if (!((unsigned int)x >> 28))	{ numZeros +=  4; x <<=  4; }
	if (!((unsigned int)x >> 30))	{ numZeros +=  2; x <<=  2; }

	numZeros -= ((unsigned int)x >> 31);

	return numZeros;
}

/* implemented in asmfunc.s */
#ifdef __cplusplus
extern "C" {
#endif

typedef __int64 Word64;

typedef union _U64 {
	Word64 w64;
	struct {
		/* ARM WinCE = little endian */
		unsigned int lo32; 
		signed int   hi32;
	} r;
} U64;

/* manual name mangling for just this platform (must match labels in .s file) */
#define MULSHIFT32	raac_MULSHIFT32
#define MADD64		raac_MADD64

int MULSHIFT32(int x, int y);
Word64 MADD64(Word64 sum64, int x, int y);

#ifdef __cplusplus
}
#endif

/* toolchain:           ARM ADS or RealView
 * target architecture: ARM v.4 and above (requires 'M' type processor for 32x32->64 multiplier)
 */
#elif defined (__arm) && defined (__ARMCC_VERSION)

static __inline int MULSHIFT32(int x, int y)
{
    /* rules for smull RdLo, RdHi, Rm, Rs:
     *   RdHi != Rm 
     *   RdLo != Rm 
     *   RdHi != RdLo
     */
    int zlow;
    __asm {
    	smull zlow,y,x,y
   	}

    return y;
}

static __inline short CLIPTOSHORT(int x)
{
	int sign;

	/* clip to [-32768, 32767] */
	sign = x >> 31;
	if (sign != (x >> 15))
		x = sign ^ ((1 << 15) - 1);

	return (short)x;
}

static __inline int FASTABS(int x) 
{
	int sign;

	sign = x >> (sizeof(int) * 8 - 1);
	x ^= sign;
	x -= sign;

	return x;
}

static __inline int CLZ(int x)
{
	int numZeros;

	if (!x)
		return 32;

	/* count leading zeros with binary search (function should be 17 ARM instructions total) */
	numZeros = 1;
	if (!((unsigned int)x >> 16))	{ numZeros += 16; x <<= 16; }
	if (!((unsigned int)x >> 24))	{ numZeros +=  8; x <<=  8; }
	if (!((unsigned int)x >> 28))	{ numZeros +=  4; x <<=  4; }
	if (!((unsigned int)x >> 30))	{ numZeros +=  2; x <<=  2; }

	numZeros -= ((unsigned int)x >> 31);

	return numZeros;

/* ARM code would look like this, but do NOT use inline asm in ADS for this,
   because you can't safely use the status register flags intermixed with C code 
 
	__asm {
	    mov		numZeros, #1
		tst		x, 0xffff0000
		addeq	numZeros, numZeros, #16
		moveq	x, x, lsl #16
		tst		x, 0xff000000
		addeq	numZeros, numZeros, #8
		moveq	x, x, lsl #8
		tst		x, 0xf0000000
		addeq	numZeros, numZeros, #4
		moveq	x, x, lsl #4
		tst		x, 0xc0000000
		addeq	numZeros, numZeros, #2
		moveq	x, x, lsl #2
		sub		numZeros, numZeros, x, lsr #31
	}
*/
/* reference:
	numZeros = 0;
	while (!(x & 0x80000000)) {
		numZeros++;
		x <<= 1;
	} 
*/
}

typedef __int64 Word64;

typedef union _U64 {
	Word64 w64;
	struct {
		/* ARM ADS = little endian */
		unsigned int lo32; 
		signed int   hi32;
	} r;
} U64;

static __inline Word64 MADD64(Word64 sum64, int x, int y) 
{
	U64 u;
	u.w64 = sum64;
	
	__asm {
    	smlal u.r.lo32, u.r.hi32, x, y 
	}

	return u.w64;
}

/* toolchain:           ARM gcc
 * target architecture: ARM v.4 and above (requires 'M' type processor for 32x32->64 multiplier)
 */
#elif defined(__GNUC__) && defined(__arm__)

static inline int MULSHIFT32(int x, int y)
{
    int zlow;
    asm ("smull %0,%1,%2,%3" : "=&r" (zlow), "=r" (y) : "r" (x), "1" (y) : "cc");
    return y;
}
/*
static inline short CLIPTOSHORT(int x) 
{
	int sign;

	// clip to [-32768, 32767] //
	sign = x >> 31;
	if (sign != (x >> 15))
		x = sign ^ ((1 << 15) - 1);

	return (short)x;
}
*/	
static inline short CLIPTOSHORT(int x) 
{
	asm ("ssat %0, #16, %1" : "=r" (x) : "r" (x));
	return x;
}

/* From coder.h, ORIGINAL:
clip to [-2^n, 2^n-1], valid range of n = [1, 30]
//TODO (FB) Is there a better way ?
*/
#define CLIP_2N(y, n) { \
	int sign = (y) >> 31;  \
	if (sign != (y) >> (n))  { \
		(y) = sign ^ ((1 << (n)) - 1); \
	} \
}

/* From coder.h, ORIGINAL:
 do y <<= n, clipping to range [-2^30, 2^30 - 1] (i.e. output has one guard bit) 
*/
//TODO (FB) Is there a better way ?
#define CLIP_2N_SHIFT(y, n) {                   \
        int sign = (y) >> 31;                   \
        if (sign != (y) >> (30 - (n)))  {       \
            (y) = sign ^ (0x3fffffff);          \
        } else {                                \
            (y) = (y) << (n);                   \
        }                                       \
    }



#define FASTABS(x) abs(x) //FB
#define CLZ(x) __builtin_clz(x) //FB

//Reverse byte order (16 bit) //FB
static inline unsigned int REV16( unsigned int value)
{
	asm ("rev16 %0, %1" : "=r" (value) : "r" (value) );
	return(value);
}

//Reverse byte order (32 bit) //FB
static inline unsigned int REV32( unsigned int value)
{
	asm ("rev %0, %1" : "=r" (value) : "r" (value) );
	return(value);
}


typedef long long Word64;

typedef union _U64 {
	Word64 w64;
	struct {
		/* little endian */
		unsigned int lo32;
		signed int   hi32;
	} r;
} U64;

static inline Word64 MADD64(Word64 sum64, int x, int y)
{
	U64 u;
	u.w64 = sum64;
	asm ("smlal %0,%1,%2,%3" : "+&r" (u.r.lo32), "+&r" (u.r.hi32) : "r" (x), "r" (y) : "cc");
	return u.w64;
}

/* toolchain:           x86 gcc
 * target architecture: x86
 */
#elif defined(__GNUC__) && (defined(__i386__) || defined(__amd64__)) || (defined (_SOLARIS) && !defined (__GNUC__) && defined(_SOLARISX86))

typedef long long Word64;

static __inline__ int MULSHIFT32(int x, int y)
{
    int z;

    z = (Word64)x * (Word64)y >> 32;
    
	return z;
}

static __inline short CLIPTOSHORT(int x)
{
	int sign;

	/* clip to [-32768, 32767] */
	sign = x >> 31;
	if (sign != (x >> 15))
		x = sign ^ ((1 << 15) - 1);

	return (short)x;
}

static __inline int FASTABS(int x) 
{
	int sign;

	sign = x >> (sizeof(int) * 8 - 1);
	x ^= sign;
	x -= sign;

	return x;
}

static __inline int CLZ(int x)
{
	int numZeros;

	if (!x)
		return 32;

	/* count leading zeros with binary search (function should be 17 ARM instructions total) */
	numZeros = 1;
	if (!((unsigned int)x >> 16))	{ numZeros += 16; x <<= 16; }
	if (!((unsigned int)x >> 24))	{ numZeros +=  8; x <<=  8; }
	if (!((unsigned int)x >> 28))	{ numZeros +=  4; x <<=  4; }
	if (!((unsigned int)x >> 30))	{ numZeros +=  2; x <<=  2; }

	numZeros -= ((unsigned int)x >> 31);

	return numZeros;
}

// do y <<= n, clipping to range [-2^30, 2^30 - 1] (i.e. output has one guard bit) 
#define CLIP_2N_SHIFT(y, n) {                   \
        int sign = (y) >> 31;                   \
        if (sign != (y) >> (30 - (n)))  {       \
            (y) = sign ^ (0x3fffffff);          \
        } else {                                \
            (y) = (y) << (n);                   \
        }                                       \
    }
// Reverse byte order (16 bit)
static inline unsigned int REV16(unsigned int value)
{
	return ((value>>8) | (value<<8));
}
// Reverse byte order (32 bit)
static inline unsigned int REV32(unsigned int n)
{
	return ((n>>24)&0xff) |	// move byte 3 to byte 0
		((n<<8)&0xff0000) |	// move byte 1 to byte 2
		((n>>8)&0xff00) |	// move byte 2 to byte 1
		((n<<24)&0xff000000);	// byte 0 to byte 3
}

typedef union _U64 {
	Word64 w64;
	struct {
		/* x86 = little endian */
		unsigned int lo32;
		signed int   hi32;
	} r;
} U64;

static __inline Word64 MADD64(Word64 sum64, int x, int y)
{
	sum64 += (Word64)x * (Word64)y;

	return sum64;
}

#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__POWERPC__)) || (defined (_SOLARIS) && !defined (__GNUC__) && !defined (_SOLARISX86))

typedef long long Word64;

static __inline__ int MULSHIFT32(int x, int y)
{
    int z;

    z = (Word64)x * (Word64)y >> 32;
    
	return z;
}

static __inline short CLIPTOSHORT(int x)
{
	int sign;

	/* clip to [-32768, 32767] */
	sign = x >> 31;
	if (sign != (x >> 15))
		x = sign ^ ((1 << 15) - 1);

	return (short)x;
}

static __inline int FASTABS(int x) 
{
	int sign;

	sign = x >> (sizeof(int) * 8 - 1);
	x ^= sign;
	x -= sign;

	return x;
}

static __inline int CLZ(int x)
{
	int numZeros;

	if (!x)
		return 32;

	/* count leading zeros with binary search (function should be 17 ARM instructions total) */
	numZeros = 1;
	if (!((unsigned int)x >> 16))	{ numZeros += 16; x <<= 16; }
	if (!((unsigned int)x >> 24))	{ numZeros +=  8; x <<=  8; }
	if (!((unsigned int)x >> 28))	{ numZeros +=  4; x <<=  4; }
	if (!((unsigned int)x >> 30))	{ numZeros +=  2; x <<=  2; }

	numZeros -= ((unsigned int)x >> 31);

	return numZeros;
}

typedef union _U64 {
	Word64 w64;
	struct {
		/* PowerPC = big endian */
		signed int   hi32;
		unsigned int lo32;
	} r;
} U64;

static __inline Word64 MADD64(Word64 sum64, int x, int y)
{
	sum64 += (Word64)x * (Word64)y;

	return sum64;
}

#else

#error Unsupported platform in assembly.h

#endif	/* platforms */

#endif /* _ASSEMBLY_H */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * aacdec.h - public C API for AAC decoder
 **************************************************************************************/

#ifndef _AACDEC_H
#define _AACDEC_H

#if defined(_WIN32) && !defined(_WIN32_WCE)
#
#elif defined(_WIN32) && defined(_WIN32_WCE) && defined(ARM)
#
#elif defined(_WIN32) && defined(WINCE_EMULATOR)
#
#elif defined (__arm) && defined (__ARMCC_VERSION)
#
#elif defined(_SYMBIAN) && defined(__WINS__)
#
#elif defined(__GNUC__) && defined(__arm__)
#
#elif defined(__GNUC__) && defined(__i386__)
#
#elif defined(__GNUC__) && defined(__amd64__)
#
#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__POWERPC__))
#
#elif defined(_OPENWAVE_SIMULATOR) || defined(_OPENWAVE_ARMULATOR)
#
#elif defined(_SOLARIS) && !defined(__GNUC__)
#
#else
#error No platform defined. See valid options in aacdec.h
#endif

#define USE_DEFAULT_STDLIB

#ifdef __cplusplus
extern "C" {
#endif

/* according to spec (13818-7 section 8.2.2, 14496-3 section 4.5.3)
 * max size of input buffer = 
 *    6144 bits =  768 bytes per SCE or CCE-I
 *   12288 bits = 1536 bytes per CPE
 *       0 bits =    0 bytes per CCE-D (uses bits from the SCE/CPE/CCE-I it is coupled to)
 */
#ifndef AAC_MAX_NCHANS				/* if max channels isn't set in makefile, */
#define AAC_MAX_NCHANS		2		/* set to default max number of channels  */
#endif
#define AAC_MAX_NSAMPS		1024
#define AAC_MAINBUF_SIZE	(768 * AAC_MAX_NCHANS)

#define AAC_NUM_PROFILES	3
#define AAC_PROFILE_MP		0
#define AAC_PROFILE_LC		1
#define AAC_PROFILE_SSR		2

/* define these to enable decoder features */
#if defined(HELIX_FEATURE_AUDIO_CODEC_AAC_SBR)
#define AAC_ENABLE_SBR
#endif //  HELIX_FEATURE_AUDIO_CODEC_AAC_SBR.
#define AAC_ENABLE_MPEG4

enum {
	ERR_AAC_NONE                          =   0,
	ERR_AAC_INDATA_UNDERFLOW              =  -1,
	ERR_AAC_NULL_POINTER                  =  -2,
	ERR_AAC_INVALID_ADTS_HEADER           =  -3,
	ERR_AAC_INVALID_ADIF_HEADER           =  -4,
	ERR_AAC_INVALID_FRAME                 =  -5,
	ERR_AAC_MPEG4_UNSUPPORTED             =  -6,
	ERR_AAC_CHANNEL_MAP                   =  -7,
	ERR_AAC_SYNTAX_ELEMENT                =  -8,

	ERR_AAC_DEQUANT                       =  -9,
	ERR_AAC_STEREO_PROCESS                = -10,
	ERR_AAC_PNS                           = -11,
	ERR_AAC_SHORT_BLOCK_DEINT             = -12,
	ERR_AAC_TNS                           = -13,
	ERR_AAC_IMDCT                         = -14,
	ERR_AAC_NCHANS_TOO_HIGH               = -15,

	ERR_AAC_SBR_INIT                      = -16,
	ERR_AAC_SBR_BITSTREAM                 = -17,
	ERR_AAC_SBR_DATA                      = -18,
	ERR_AAC_SBR_PCM_FORMAT                = -19,
	ERR_AAC_SBR_NCHANS_TOO_HIGH           = -20,
	ERR_AAC_SBR_SINGLERATE_UNSUPPORTED    = -21,

	ERR_AAC_RAWBLOCK_PARAMS               = -22,

	ERR_AAC_UNKNOWN						= -9999
};

typedef struct _AACFrameInfo {
	int bitRate;
	int nChans;
	int sampRateCore;
	int sampRateOut;
	int bitsPerSample;
	int outputSamps;
	int profile;
	int tnsUsed;
	int pnsUsed;
} AACFrameInfo;

typedef void *HAACDecoder;

/* public C API */
HAACDecoder AACInitDecoder(void);
void AACFreeDecoder(HAACDecoder hAACDecoder);
int AACDecode(HAACDecoder hAACDecoder, unsigned char **inbuf, int *bytesLeft, short *outbuf);

int AACFindSyncWord(unsigned char *buf, int nBytes);
void AACGetLastFrameInfo(HAACDecoder hAACDecoder, AACFrameInfo *aacFrameInfo);
int AACSetRawBlockParams(HAACDecoder hAACDecoder, int copyLast, AACFrameInfo *aacFrameInfo);
int AACFlushCodec(HAACDecoder hAACDecoder);

#ifdef HELIX_CONFIG_AAC_GENERATE_TRIGTABS_FLOAT
int AACInitTrigtabsFloat(void);
void AACFreeTrigtabsFloat(void);
#endif

#ifdef __cplusplus
}
#endif

#endif	/* _AACDEC_H */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * statname.h - name mangling macros for static linking
 **************************************************************************************/

#ifndef _STATNAME_H
#define _STATNAME_H

/* define STAT_PREFIX to a unique name for static linking 
 * all the C functions and global variables will be mangled by the preprocessor
 *   e.g. void DCT4(...) becomes void raac_DCT4(...)
 */
#define STAT_PREFIX		raac

#define STATCC1(x,y,z)	STATCC2(x,y,z)
#define STATCC2(x,y,z)	x##y##z  

#ifdef STAT_PREFIX
#define STATNAME(func)	STATCC1(STAT_PREFIX, _, func)
#else
#define STATNAME(func)	func
#endif

/* these symbols are common to all implementations */
#define AllocateBuffers			STATNAME(AllocateBuffers)
#define FreeBuffers				STATNAME(FreeBuffers)
#define ClearBuffer				STATNAME(ClearBuffer)

#define SetRawBlockParams		STATNAME(SetRawBlockParams)
#define PrepareRawBlock			STATNAME(PrepareRawBlock)
#define FlushCodec				STATNAME(FlushCodec)

#define UnpackADTSHeader		STATNAME(UnpackADTSHeader)
#define GetADTSChannelMapping	STATNAME(GetADTSChannelMapping)
#define UnpackADIFHeader		STATNAME(UnpackADIFHeader)
#define DecodeNextElement		STATNAME(DecodeNextElement)
#define DecodeNoiselessData		STATNAME(DecodeNoiselessData)
#define Dequantize				STATNAME(Dequantize)
#define StereoProcess			STATNAME(StereoProcess)
#define DeinterleaveShortBlocks	STATNAME(DeinterleaveShortBlocks)
#define PNS						STATNAME(PNS)
#define TNSFilter				STATNAME(TNSFilter)
#define IMDCT					STATNAME(IMDCT)

#define InitSBR					STATNAME(InitSBR)
#define DecodeSBRBitstream		STATNAME(DecodeSBRBitstream)
#define DecodeSBRData			STATNAME(DecodeSBRData)
#define FreeSBR					STATNAME(FreeSBR)
#define FlushCodecSBR			STATNAME(FlushCodecSBR)

/* global ROM tables */
#define sampRateTab				STATNAME(sampRateTab)
#define predSFBMax				STATNAME(predSFBMax)
#define channelMapTab			STATNAME(channelMapTab)
#define elementNumChans			STATNAME(elementNumChans)
#define sfBandTotalShort		STATNAME(sfBandTotalShort)
#define sfBandTotalLong			STATNAME(sfBandTotalLong)
#define sfBandTabShortOffset	STATNAME(sfBandTabShortOffset)
#define sfBandTabShort			STATNAME(sfBandTabShort)
#define sfBandTabLongOffset		STATNAME(sfBandTabLongOffset)
#define sfBandTabLong			STATNAME(sfBandTabLong)
#define tnsMaxBandsShortOffset	STATNAME(tnsMaxBandsShortOffset)
#define tnsMaxBandsShort		STATNAME(tnsMaxBandsShort)
#define tnsMaxOrderShort		STATNAME(tnsMaxOrderShort)
#define tnsMaxBandsLongOffset	STATNAME(tnsMaxBandsLongOffset)
#define tnsMaxBandsLong			STATNAME(tnsMaxBandsLong)
#define tnsMaxOrderLong			STATNAME(tnsMaxOrderLong)

/* in your implementation's top-level include file (e.g. real\coder.h) you should
 *   add new #define sym STATNAME(sym) lines for all the
 *   additional global functions or variables which your
 *   implementation uses
 */

#endif /* _STATNAME_H */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * aaccommon.h - implementation-independent API's, datatypes, and definitions
 **************************************************************************************/

#ifndef _AACCOMMON_H
#define _AACCOMMON_H

//#include "aacdec.h"
//#include "statname.h"

/* 12-bit syncword */
#define	SYNCWORDH			0xff
#define	SYNCWORDL			0xf0

#define MAX_NCHANS_ELEM		2	/* max number of channels in any single bitstream element (SCE,CPE,CCE,LFE) */

#define ADTS_HEADER_BYTES	7
#define NUM_SAMPLE_RATES	12
#define NUM_DEF_CHAN_MAPS	8
#define NUM_ELEMENTS		8
#define MAX_NUM_PCE_ADIF	16

#define MAX_WIN_GROUPS		8
#define MAX_SFB_SHORT		15
#define MAX_SF_BANDS		(MAX_SFB_SHORT*MAX_WIN_GROUPS)	/* worst case = 15 sfb's * 8 windows for short block */
#define MAX_MS_MASK_BYTES	((MAX_SF_BANDS + 7) >> 3)
#define MAX_PRED_SFB		41
#define MAX_TNS_FILTERS		8
#define MAX_TNS_COEFS		60
#define MAX_TNS_ORDER		20
#define MAX_PULSES			4
#define MAX_GAIN_BANDS		3
#define MAX_GAIN_WIN		8
#define MAX_GAIN_ADJUST		7

#define NSAMPS_LONG			1024
#define NSAMPS_SHORT		128

#define NUM_SYN_ID_BITS		3
#define NUM_INST_TAG_BITS	4

#define EXT_SBR_DATA		0x0d
#define EXT_SBR_DATA_CRC	0x0e

#define IS_ADIF(p)		((p)[0] == 'A' && (p)[1] == 'D' && (p)[2] == 'I' && (p)[3] == 'F')
#define GET_ELE_ID(p)	((AACElementID)(*(p) >> (8-NUM_SYN_ID_BITS)))

/* AAC file format */
enum {
	AAC_FF_Unknown = 0,		/* should be 0 on init */

	AAC_FF_ADTS = 1,
	AAC_FF_ADIF = 2,
	AAC_FF_RAW =  3

};

/* syntactic element type */
enum {
	AAC_ID_INVALID = -1,

	AAC_ID_SCE =  0,
	AAC_ID_CPE =  1,
	AAC_ID_CCE =  2,
	AAC_ID_LFE =  3,
	AAC_ID_DSE =  4,
	AAC_ID_PCE =  5,
	AAC_ID_FIL =  6,
	AAC_ID_END =  7
};

typedef struct _AACDecInfo {
	/* pointers to platform-specific state information */
	void *psInfoBase;	/* baseline MPEG-4 LC decoding */
	void *psInfoSBR;	/* MPEG-4 SBR decoding */
	
	/* raw decoded data, before rounding to 16-bit PCM (for postprocessing such as SBR) */
	void *rawSampleBuf[AAC_MAX_NCHANS];
	int rawSampleBytes;
	int rawSampleFBits;

	/* fill data (can be used for processing SBR or other extensions) */
	unsigned char *fillBuf;
	int fillCount;
	int fillExtType;

	/* block information */
	int prevBlockID;
	int currBlockID;
	int currInstTag;
	int sbDeinterleaveReqd[MAX_NCHANS_ELEM];
	int adtsBlocksLeft;

	/* user-accessible info */
	int bitRate;
	int nChans;
	int sampRate;
	int profile;
	int format;
	int sbrEnabled;
	int tnsUsed;
	int pnsUsed;
	int frameCount;

} AACDecInfo;

/* decoder functions which must be implemented for each platform */
AACDecInfo *AllocateBuffers(void);
void FreeBuffers(AACDecInfo *aacDecInfo);
void ClearBuffer(void *buf, int nBytes);

int UnpackADTSHeader(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail);
int GetADTSChannelMapping(AACDecInfo *aacDecInfo, unsigned char *buf, int bitOffset, int bitsAvail);
int UnpackADIFHeader(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail);
int SetRawBlockParams(AACDecInfo *aacDecInfo, int copyLast, int nChans, int sampRate, int profile);
int PrepareRawBlock(AACDecInfo *aacDecInfo);
int FlushCodec(AACDecInfo *aacDecInfo);

int DecodeNextElement(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail);
int DecodeNoiselessData(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail, int ch);

int Dequantize(AACDecInfo *aacDecInfo, int ch);
int StereoProcess(AACDecInfo *aacDecInfo);
int DeinterleaveShortBlocks(AACDecInfo *aacDecInfo, int ch);
int PNS(AACDecInfo *aacDecInfo, int ch);
int TNSFilter(AACDecInfo *aacDecInfo, int ch);
int IMDCT(AACDecInfo *aacDecInfo, int ch, int chBase, short *outbuf);

/* SBR specific functions */
int InitSBR(AACDecInfo *aacDecInfo);
void FreeSBR(AACDecInfo *aacDecInfo);
int DecodeSBRBitstream(AACDecInfo *aacDecInfo, int chBase);
int DecodeSBRData(AACDecInfo *aacDecInfo, int chBase, short *outbuf);
int FlushCodecSBR(AACDecInfo *aacDecInfo);

/* aactabs.c - global ROM tables */
extern const int sampRateTab[NUM_SAMPLE_RATES];
extern const int predSFBMax[NUM_SAMPLE_RATES];
extern const int channelMapTab[NUM_DEF_CHAN_MAPS];
extern const int elementNumChans[NUM_ELEMENTS];
extern const unsigned char sfBandTotalShort[NUM_SAMPLE_RATES];
extern const unsigned char sfBandTotalLong[NUM_SAMPLE_RATES];
extern const int sfBandTabShortOffset[NUM_SAMPLE_RATES];
extern const short sfBandTabShort[76];
extern const int sfBandTabLongOffset[NUM_SAMPLE_RATES];
extern const short sfBandTabLong[325];
extern const int tnsMaxBandsShortOffset[AAC_NUM_PROFILES];
extern const unsigned char tnsMaxBandsShort[2*NUM_SAMPLE_RATES];
extern const unsigned char tnsMaxOrderShort[AAC_NUM_PROFILES];
extern const int tnsMaxBandsLongOffset[AAC_NUM_PROFILES];
extern const unsigned char tnsMaxBandsLong[2*NUM_SAMPLE_RATES];
extern const unsigned char tnsMaxOrderLong[AAC_NUM_PROFILES];

#endif	/* _AACCOMMON_H */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * bitstream.h - definitions of bitstream handling functions
 **************************************************************************************/

#ifndef _BITSTREAM_H
#define _BITSTREAM_H

//#include "aaccommon.h"

/* additional external symbols to name-mangle for static linking */
#define SetBitstreamPointer				STATNAME(SetBitstreamPointer)
#define GetBits							STATNAME(GetBits)
#define GetBitsNoAdvance				STATNAME(GetBitsNoAdvance)
#define AdvanceBitstream				STATNAME(AdvanceBitstream)
#define CalcBitsUsed					STATNAME(CalcBitsUsed)
#define ByteAlignBitstream				STATNAME(ByteAlignBitstream)

typedef struct _BitStreamInfo {
	unsigned char *bytePtr;
	unsigned int iCache;
	int cachedBits;
	int nBytes;
} BitStreamInfo;

/* bitstream.c */
void SetBitstreamPointer(BitStreamInfo *bsi, int nBytes, unsigned char *buf);
unsigned int GetBits(BitStreamInfo *bsi, int nBits);
unsigned int GetBitsNoAdvance(BitStreamInfo *bsi, int nBits);
void AdvanceBitstream(BitStreamInfo *bsi, int nBits);
int CalcBitsUsed(BitStreamInfo *bsi, unsigned char *startBuf, int startOffset);
void ByteAlignBitstream(BitStreamInfo *bsi);

#endif	/* _BITSTREAM_H */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * coder.h - definitions of platform-specific data structures, functions, and tables
 **************************************************************************************/

#ifndef _CODER_H
#define _CODER_H

//#include "aaccommon.h"
//#include "bitstream.h"

#ifndef ASSERT
#if defined(_WIN32) && defined(_M_IX86) && (defined (_DEBUG) || defined (REL_ENABLE_ASSERTS))
#define ASSERT(x) if (!(x)) __asm int 3;
#else
#define ASSERT(x) /* do nothing */
#endif
#endif

#ifndef MAX
#define MAX(a,b)        ((a) > (b) ? (a) : (b))
#endif

#ifndef MIN
#define MIN(a,b)        ((a) < (b) ? (a) : (b))
#endif

#define NWINDOWS_LONG           1
#define NWINDOWS_SHORT          8

#define DATA_BUF_SIZE           510             /* max count = 255 + 255 */
#define FILL_BUF_SIZE           269             /* max count = 15 + 255 - 1*/
#define ADIF_COPYID_SIZE        9
#define MAX_COMMENT_BYTES       255

#define MAX_NUM_FCE                     15
#define MAX_NUM_SCE                     15
#define MAX_NUM_BCE                     15
#define MAX_NUM_LCE                      3
#define MAX_NUM_ADE                      7
#define MAX_NUM_CCE                     15

#define CHAN_ELEM_IS_CPE(x)             (((x) & 0x10) >> 4)  /* bit 4 = SCE/CPE flag */
#define CHAN_ELEM_GET_TAG(x)    (((x) & 0x0f) >> 0)  /* bits 3-0 = instance tag */

#define CHAN_ELEM_SET_CPE(x)    (((x) & 0x01) << 4)  /* bit 4 = SCE/CPE flag */
#define CHAN_ELEM_SET_TAG(x)    (((x) & 0x0f) << 0)  /* bits 3-0 = instance tag */

#define MAX_HUFF_BITS                   20
#define HUFFTAB_SPEC_OFFSET             1

/* do y <<= n, clipping to range [-2^30, 2^30 - 1] (i.e. output has one guard bit) */
/*
#define CLIP_2N_SHIFT(y, n) {                   \
        int sign = (y) >> 31;                   \
        if (sign != (y) >> (30 - (n)))  {       \
            (y) = sign ^ (0x3fffffff);          \
        } else {                                \
            (y) = (y) << (n);                   \
        }                                       \
    }
*/
/* clip to [-2^n, 2^n-1], valid range of n = [1, 30] */
/*
#define CLIP_2N(val, n) {                               \
        if ((val) >> 31 != (val) >> (n))                \
            (val) = ((val) >> 31) ^ ((1 << (n)) - 1);   \
    }
*/
	

#define SF_DQ_OFFSET            15
#define FBITS_OUT_DQ            20
#define FBITS_OUT_DQ_OFF        (FBITS_OUT_DQ - SF_DQ_OFFSET)   /* number of fraction bits out of dequant, including 2^15 bias */

#define FBITS_IN_IMDCT          FBITS_OUT_DQ_OFF        /* number of fraction bits into IMDCT */
#define GBITS_IN_DCT4           4                                       /* min guard bits in for DCT4 */

#define FBITS_LOST_DCT4         1               /* number of fraction bits lost (>> out) in DCT-IV */
#define FBITS_LOST_WND          1               /* number of fraction bits lost (>> out) in synthesis window (neg = gain frac bits) */
#define FBITS_LOST_IMDCT        (FBITS_LOST_DCT4 + FBITS_LOST_WND)
#define FBITS_OUT_IMDCT         (FBITS_IN_IMDCT - FBITS_LOST_IMDCT)

#define NUM_IMDCT_SIZES         2

/* additional external symbols to name-mangle for static linking */
#define DecodeProgramConfigElement              STATNAME(DecodeProgramConfigElement)
#define DecodeHuffmanScalar                             STATNAME(DecodeHuffmanScalar)
#define DecodeSpectrumLong                              STATNAME(DecodeSpectrumLong)
#define DecodeSpectrumShort                             STATNAME(DecodeSpectrumShort)
#define DecodeICSInfo                                   STATNAME(DecodeICSInfo)
#define DCT4                                                    STATNAME(DCT4)
#define R4FFT                                                   STATNAME(R4FFT)

#define DecWindowOverlapNoClip                  STATNAME(DecWindowOverlapNoClip)
#define DecWindowOverlapLongStartNoClip STATNAME(DecWindowOverlapLongStartNoClip)
#define DecWindowOverlapLongStopNoClip  STATNAME(DecWindowOverlapLongStopNoClip)
#define DecWindowOverlapShortNoClip             STATNAME(DecWindowOverlapShortNoClip)

#define huffTabSpecInfo                         STATNAME(huffTabSpecInfo)
#define huffTabSpec                                     STATNAME(huffTabSpec)
#define huffTabScaleFactInfo            STATNAME(huffTabScaleFactInfo)
#define huffTabScaleFact                        STATNAME(huffTabScaleFact)
#define cos4sin4tab                                     STATNAME(cos4sin4tab)
#define cos4sin4tabOffset                       STATNAME(cos4sin4tabOffset)
#define cos1sin1tab                                     STATNAME(cos1sin1tab)
#define sinWindow                                       STATNAME(sinWindow)
#define sinWindowOffset                         STATNAME(sinWindowOffset)
#define kbdWindow                                       STATNAME(kbdWindow)
#define kbdWindowOffset                         STATNAME(kbdWindowOffset)
#define bitrevtab                                       STATNAME(bitrevtab)
#define bitrevtabOffset                         STATNAME(bitrevtabOffset)
#define uniqueIDTab                                     STATNAME(uniqueIDTab)
#define twidTabEven                                     STATNAME(twidTabEven)
#define twidTabOdd                                      STATNAME(twidTabOdd)

typedef struct _HuffInfo {
    int maxBits;                                                    /* number of bits in longest codeword */
    unsigned char count[MAX_HUFF_BITS];         /* count[i] = number of codes with length i+1 bits */
    int offset;                                                             /* offset into symbol table */
} HuffInfo;

typedef struct _PulseInfo {
    unsigned char pulseDataPresent;
    unsigned char numPulse;
    unsigned char startSFB;
    unsigned char offset[MAX_PULSES];
    unsigned char amp[MAX_PULSES];
} PulseInfo;

typedef struct _TNSInfo {
    unsigned char tnsDataPresent;
    unsigned char numFilt[MAX_TNS_FILTERS];     /* max 1 filter each for 8 short windows, or 3 filters for 1 long window */
    unsigned char coefRes[MAX_TNS_FILTERS];
    unsigned char length[MAX_TNS_FILTERS];
    unsigned char order[MAX_TNS_FILTERS];
    unsigned char dir[MAX_TNS_FILTERS];
    signed char   coef[MAX_TNS_COEFS];              /* max 3 filters * 20 coefs for 1 long window, or 1 filter * 7 coefs for each of 8 short windows */
} TNSInfo;

typedef struct _GainControlInfo {
    unsigned char gainControlDataPresent;
    unsigned char maxBand;
    unsigned char adjNum[MAX_GAIN_BANDS][MAX_GAIN_WIN];
    unsigned char alevCode[MAX_GAIN_BANDS][MAX_GAIN_WIN][MAX_GAIN_ADJUST];
    unsigned char alocCode[MAX_GAIN_BANDS][MAX_GAIN_WIN][MAX_GAIN_ADJUST];
} GainControlInfo;

typedef struct _ICSInfo {
    unsigned char icsResBit;
    unsigned char winSequence;
    unsigned char winShape;
    unsigned char maxSFB;
    unsigned char sfGroup;
    unsigned char predictorDataPresent;
    unsigned char predictorReset;
    unsigned char predictorResetGroupNum;
    unsigned char predictionUsed[MAX_PRED_SFB];
    unsigned char numWinGroup;
    unsigned char winGroupLen[MAX_WIN_GROUPS];
} ICSInfo;

typedef struct _ADTSHeader {
    /* fixed */
    unsigned char id;                             /* MPEG bit - should be 1 */
    unsigned char layer;                          /* MPEG layer - should be 0 */
    unsigned char protectBit;                     /* 0 = CRC word follows, 1 = no CRC word */
    unsigned char profile;                        /* 0 = main, 1 = LC, 2 = SSR, 3 = reserved */
    unsigned char sampRateIdx;                    /* sample rate index range = [0, 11] */
    unsigned char privateBit;                     /* ignore */
    unsigned char channelConfig;                  /* 0 = implicit, >0 = use default table */
    unsigned char origCopy;                       /* 0 = copy, 1 = original */
    unsigned char home;                           /* ignore */

    /* variable */
    unsigned char copyBit;                        /* 1 bit of the 72-bit copyright ID (transmitted as 1 bit per frame) */
    unsigned char copyStart;                      /* 1 = this bit starts the 72-bit ID, 0 = it does not */
    int           frameLength;                    /* length of frame */
    int           bufferFull;                     /* number of 32-bit words left in enc buffer, 0x7FF = VBR */
    unsigned char numRawDataBlocks;               /* number of raw data blocks in frame */

    /* CRC */
    int           crcCheckWord;                   /* 16-bit CRC check word (present if protectBit == 0) */
} ADTSHeader;

typedef struct _ADIFHeader {
    unsigned char copyBit;                        /* 0 = no copyright ID, 1 = 72-bit copyright ID follows immediately */
    unsigned char origCopy;                       /* 0 = copy, 1 = original */
    unsigned char home;                           /* ignore */
    unsigned char bsType;                         /* bitstream type: 0 = CBR, 1 = VBR */
    int           bitRate;                        /* bitRate: CBR = bits/sec, VBR = peak bits/frame, 0 = unknown */
    unsigned char numPCE;                         /* number of program config elements (max = 16) */
    int           bufferFull;                     /* bits left in bit reservoir */
    unsigned char copyID[ADIF_COPYID_SIZE];       /* optional 72-bit copyright ID */
} ADIFHeader;

/* sizeof(ProgConfigElement) = 82 bytes (if KEEP_PCE_COMMENTS not defined) */
typedef struct _ProgConfigElement {
    unsigned char elemInstTag;                    /* element instance tag */
    unsigned char profile;                        /* 0 = main, 1 = LC, 2 = SSR, 3 = reserved */
    unsigned char sampRateIdx;                    /* sample rate index range = [0, 11] */
    unsigned char numFCE;                         /* number of front channel elements (max = 15) */
    unsigned char numSCE;                         /* number of side channel elements (max = 15) */
    unsigned char numBCE;                         /* number of back channel elements (max = 15) */
    unsigned char numLCE;                         /* number of LFE channel elements (max = 3) */
    unsigned char numADE;                         /* number of associated data elements (max = 7) */
    unsigned char numCCE;                         /* number of valid channel coupling elements (max = 15) */
    unsigned char monoMixdown;                    /* mono mixdown: bit 4 = present flag, bits 3-0 = element number */
    unsigned char stereoMixdown;                  /* stereo mixdown: bit 4 = present flag, bits 3-0 = element number */
    unsigned char matrixMixdown;                  /* matrix mixdown: bit 4 = present flag, bit 3 = unused, 
                                                     bits 2-1 = index, bit 0 = pseudo-surround enable */
    unsigned char fce[MAX_NUM_FCE];               /* front element channel pair: bit 4 = SCE/CPE flag, bits 3-0 = inst tag */
    unsigned char sce[MAX_NUM_SCE];               /* side element channel pair: bit 4 = SCE/CPE flag, bits 3-0 = inst tag */
    unsigned char bce[MAX_NUM_BCE];               /* back element channel pair: bit 4 = SCE/CPE flag, bits 3-0 = inst tag */
    unsigned char lce[MAX_NUM_LCE];               /* instance tag for LFE elements */
    unsigned char ade[MAX_NUM_ADE];               /* instance tag for ADE elements */
    unsigned char cce[MAX_NUM_BCE];               /* channel coupling elements: bit 4 = switching flag, bits 3-0 = inst tag */

#ifdef KEEP_PCE_COMMENTS
    /* make this optional - if not enabled, decoder will just skip comments */
    unsigned char commentBytes;
    unsigned char commentField[MAX_COMMENT_BYTES];
#endif

} ProgConfigElement;

/* state info struct for baseline (MPEG-4 LC) decoding */
typedef struct _PSInfoBase {
    /* header information */
    ADTSHeader            fhADTS;
    ADIFHeader            fhADIF;
    ProgConfigElement     pce[MAX_NUM_PCE_ADIF];
    int                   dataCount;
    unsigned char         dataBuf[DATA_BUF_SIZE];
    int                   fillCount;
    unsigned char         fillBuf[FILL_BUF_SIZE];

    /* state information which is the same throughout whole frame */
    int                   nChans;
    int                   useImpChanMap;
    int                   sampRateIdx;

    /* state information which can be overwritten by subsequent elements within frame */
    ICSInfo               icsInfo[MAX_NCHANS_ELEM];

    int                   commonWin;
    short                 scaleFactors[MAX_NCHANS_ELEM][MAX_SF_BANDS];
    unsigned char         sfbCodeBook[MAX_NCHANS_ELEM][MAX_SF_BANDS];

    int                   msMaskPresent;
    unsigned char         msMaskBits[MAX_MS_MASK_BYTES];

    int                   pnsUsed[MAX_NCHANS_ELEM];
    int                   pnsLastVal;
    int                   intensityUsed[MAX_NCHANS_ELEM];

    PulseInfo             pulseInfo[MAX_NCHANS_ELEM];

    TNSInfo               tnsInfo[MAX_NCHANS_ELEM];
    int                   tnsLPCBuf[MAX_TNS_ORDER];
    int                   tnsWorkBuf[MAX_TNS_ORDER];

    GainControlInfo       gainControlInfo[MAX_NCHANS_ELEM];

    int                   gbCurrent[MAX_NCHANS_ELEM];
    int                   coef[MAX_NCHANS_ELEM][AAC_MAX_NSAMPS];
#ifdef AAC_ENABLE_SBR
    int                   sbrWorkBuf[MAX_NCHANS_ELEM][AAC_MAX_NSAMPS];
#endif
    /* state information which must be saved for each element and used in next frame */
    int                   overlap[AAC_MAX_NCHANS][AAC_MAX_NSAMPS];
    int                   prevWinShape[AAC_MAX_NCHANS];

} PSInfoBase;

/* private implementation-specific functions */

/* decelmnt.c */
int DecodeProgramConfigElement(ProgConfigElement *pce, BitStreamInfo *bsi);

/* huffman.c */
int DecodeHuffmanScalar(const signed short *huffTab, const HuffInfo *huffTabInfo, unsigned int bitBuf, signed int *val);
void DecodeSpectrumLong(PSInfoBase *psi, BitStreamInfo *bsi, int ch);
void DecodeSpectrumShort(PSInfoBase *psi, BitStreamInfo *bsi, int ch);

/* noiseless.c */
void DecodeICSInfo(BitStreamInfo *bsi, ICSInfo *icsInfo, int sampRateIdx);

/* dct4.c */
void DCT4(int tabidx, int *coef, int gb);

/* fft.c */
void R4FFT(int tabidx, int *x);

/* sbrimdct.c */
void DecWindowOverlapNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev);
void DecWindowOverlapLongStartNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev);
void DecWindowOverlapLongStopNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev);
void DecWindowOverlapShortNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev);

/* hufftabs.c */
extern const HuffInfo huffTabSpecInfo[11];
extern const signed short huffTabSpec[1241];
extern const HuffInfo huffTabScaleFactInfo; 
extern const signed short huffTabScaleFact[121];

/* trigtabs.c */
extern const int cos4sin4tabOffset[NUM_IMDCT_SIZES];
extern const int sinWindowOffset[NUM_IMDCT_SIZES];
extern const int kbdWindowOffset[NUM_IMDCT_SIZES];
extern const unsigned char bitrevtab[17 + 129];
extern const int bitrevtabOffset[NUM_IMDCT_SIZES];

#ifdef HELIX_CONFIG_AAC_GENERATE_TRIGTABS_FLOAT
/* trigtabs_fltgen.c */
extern int cos4sin4tab[128 + 1024];
extern int cos1sin1tab[514];
extern int sinWindow[128 + 1024];
extern int kbdWindow[128 + 1024];
extern int twidTabEven[4*6 + 16*6 + 64*6];
extern int twidTabOdd[8*6 + 32*6 + 128*6];
#else
/* trigtabs.c */
extern const int cos4sin4tab[128 + 1024];
extern const int cos1sin1tab[514];
extern const int sinWindow[128 + 1024];
extern const int kbdWindow[128 + 1024];
extern const int twidTabEven[4*6 + 16*6 + 64*6];
extern const int twidTabOdd[8*6 + 32*6 + 128*6];
#endif

#endif  /* _CODER_H */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbr.h - definitions of platform-specific SBR data structures, functions, and tables
 **************************************************************************************/

#ifndef _SBR_H
#define _SBR_H

//#include "aaccommon.h"
//#include "bitstream.h"

#ifndef ASSERT
#if defined(_WIN32) && defined(_M_IX86) && (defined (_DEBUG) || defined (REL_ENABLE_ASSERTS))
#define ASSERT(x) if (!(x)) __asm int 3;
#else
#define ASSERT(x) /* do nothing */
#endif
#endif

#ifndef MAX
#define MAX(a,b)	((a) > (b) ? (a) : (b))
#endif

#ifndef MIN
#define MIN(a,b)	((a) < (b) ? (a) : (b))
#endif

#define NUM_TIME_SLOTS			16
#define SAMPLES_PER_SLOT		2	/* RATE in spec */
#define NUM_SAMPLE_RATES_SBR	9	/* downsampled (single-rate) mode unsupported, so only use Fs_sbr >= 16 kHz */

#define MAX_NUM_ENV					5
#define MAX_NUM_NOISE_FLOORS		2
#define MAX_NUM_NOISE_FLOOR_BANDS	5	/* max Nq, see 4.6.18.3.6 */
#define MAX_NUM_PATCHES				5
#define MAX_NUM_SMOOTH_COEFS		5

#define HF_GEN			8
#define HF_ADJ			2

#define MAX_QMF_BANDS	48		/* max QMF subbands covered by SBR (4.6.18.3.6) */

#define FBITS_IN_QMFA	14
#define FBITS_LOST_QMFA	(1 + 2 + 3 + 2 + 1)	/* 1 from cTab, 2 in premul, 3 in FFT, 2 in postmul, 1 for implicit scaling by 2.0 */
#define FBITS_OUT_QMFA	(FBITS_IN_QMFA - FBITS_LOST_QMFA)

#define MIN_GBITS_IN_QMFS		2
#define FBITS_IN_QMFS			FBITS_OUT_QMFA
#define FBITS_LOST_DCT4_64		(2 + 3 + 2)		/* 2 in premul, 3 in FFT, 2 in postmul */

#define FBITS_OUT_DQ_ENV	29	/* dequantized env scalefactors are Q(29 - envDataDequantScale) */
#define FBITS_OUT_DQ_NOISE	24	/* range of Q_orig = [2^-24, 2^6] */
#define NOISE_FLOOR_OFFSET	6

/* see comments in ApplyBoost() */
#define FBITS_GLIM_BOOST	24
#define FBITS_QLIM_BOOST	14

#define MAX_HUFF_BITS		20
#define NUM_QMF_DELAY_BUFS	10
#define DELAY_SAMPS_QMFA	(NUM_QMF_DELAY_BUFS * 32)
#define DELAY_SAMPS_QMFS	(NUM_QMF_DELAY_BUFS * 128)

/* additional external symbols to name-mangle for static linking */
#define FFT32C							STATNAME(FFT32C)
#define CalcFreqTables					STATNAME(CalcFreqTables)
#define AdjustHighFreq					STATNAME(AdjustHighFreq)
#define GenerateHighFreq				STATNAME(GenerateHighFreq)
#define DecodeSBREnvelope				STATNAME(DecodeSBREnvelope)
#define DecodeSBRNoise					STATNAME(DecodeSBRNoise)
#define UncoupleSBREnvelope				STATNAME(UncoupleSBREnvelope)
#define UncoupleSBRNoise				STATNAME(UncoupleSBRNoise)
#define InvRNormalized					STATNAME(InvRNormalized)
#define RatioPowInv						STATNAME(RatioPowInv)
#define SqrtFix							STATNAME(SqrtFix)
#define QMFAnalysis						STATNAME(QMFAnalysis)
#define QMFSynthesis					STATNAME(QMFSynthesis)
#define GetSampRateIdx					STATNAME(GetSampRateIdx)
#define UnpackSBRHeader					STATNAME(UnpackSBRHeader)
#define UnpackSBRSingleChannel			STATNAME(UnpackSBRSingleChannel)
#define UnpackSBRChannelPair			STATNAME(UnpackSBRChannelPair)

/* asm functions */
#define CVKernel1						STATNAME(CVKernel1)
#define CVKernel2						STATNAME(CVKernel2)
#define QMFAnalysisConv					STATNAME(QMFAnalysisConv)
#define QMFSynthesisConv				STATNAME(QMFSynthesisConv)

#define k0Tab							STATNAME(k0Tab)
#define k2Tab							STATNAME(k2Tab)
#define goalSBTab						STATNAME(goalSBTab)
#define huffTabSBR						STATNAME(huffTabSBR)
#define huffTabSBRInfo					STATNAME(huffTabSBRInfo)
#define log2Tab							STATNAME(log2Tab)
#define noiseTab						STATNAME(noiseTab)
#define cTabA							STATNAME(cTabA)
#define cTabS							STATNAME(cTabS)

/* do y <<= n, clipping to range [-2^30, 2^30 - 1] (i.e. output has one guard bit) */
#define CLIP_2N_SHIFT30(y, n) { \
	int sign = (y) >> 31;  \
	if (sign != (y) >> (30 - (n)))  { \
		(y) = sign ^ (0x3fffffff); \
	} else { \
		(y) = (y) << (n); \
	} \
}

#define CLIP_2N(y, n) { \
	int sign = (y) >> 31;  \
	if (sign != ((y) >> (n)))  { \
		(y) = sign ^ ((1 << (n)) - 1); \
	} \
}

enum {
	SBR_GRID_FIXFIX = 0,
	SBR_GRID_FIXVAR = 1,
	SBR_GRID_VARFIX = 2,
	SBR_GRID_VARVAR = 3
};

enum {
	HuffTabSBR_tEnv15 =    0,
	HuffTabSBR_fEnv15 =    1,
	HuffTabSBR_tEnv15b =   2,
	HuffTabSBR_fEnv15b =   3,
	HuffTabSBR_tEnv30 =    4,
	HuffTabSBR_fEnv30 =    5,
	HuffTabSBR_tEnv30b =   6,
	HuffTabSBR_fEnv30b =   7,
	HuffTabSBR_tNoise30 =  8,
	HuffTabSBR_fNoise30 =  5,
	HuffTabSBR_tNoise30b = 9,
	HuffTabSBR_fNoise30b = 7
};

//typedef struct _HuffInfo {
//	int maxBits;					/* number of bits in longest codeword */
//	unsigned char count[MAX_HUFF_BITS];		/* count[i] = number of codes with length i+1 bits */
//	int offset;					/* offset into symbol table */
//} HuffInfo;

/* need one SBRHeader per element (SCE/CPE), updated only on new header */
typedef struct _SBRHeader {
	int                   count;

	unsigned char         ampRes;
	unsigned char         startFreq;
	unsigned char         stopFreq;
	unsigned char         crossOverBand;
	unsigned char         resBitsHdr;
	unsigned char         hdrExtra1;
	unsigned char         hdrExtra2;

	unsigned char         freqScale;
	unsigned char         alterScale;
	unsigned char         noiseBands;
	
	unsigned char         limiterBands;
	unsigned char         limiterGains;
	unsigned char         interpFreq;
	unsigned char         smoothMode;
} SBRHeader;

/* need one SBRGrid per channel, updated every frame */
typedef struct _SBRGrid {
	unsigned char         frameClass;
	unsigned char         ampResFrame;
	unsigned char         pointer;

	unsigned char         numEnv;						/* L_E */
	unsigned char         envTimeBorder[MAX_NUM_ENV+1];	/* t_E */
	unsigned char         freqRes[MAX_NUM_ENV];			/* r */

	unsigned char         numNoiseFloors;							/* L_Q */
	unsigned char         noiseTimeBorder[MAX_NUM_NOISE_FLOORS+1];	/* t_Q */

	unsigned char         numEnvPrev;
	unsigned char         numNoiseFloorsPrev;
	unsigned char         freqResPrev;
} SBRGrid;

/* need one SBRFreq per element (SCE/CPE/LFE), updated only on header reset */
typedef struct _SBRFreq {
	int                   kStart;				/* k_x */
	int                   nMaster;
	int                   nHigh;
	int                   nLow;
	int                   nLimiter;				/* N_l */
	int                   numQMFBands;			/* M */
	int                   numNoiseFloorBands;	/* Nq */

	int                   kStartPrev;
	int                   numQMFBandsPrev;

	unsigned char         freqMaster[MAX_QMF_BANDS + 1];	/* not necessary to save this  after derived tables are generated */
	unsigned char         freqHigh[MAX_QMF_BANDS + 1];
	unsigned char         freqLow[MAX_QMF_BANDS / 2 + 1];	/* nLow = nHigh - (nHigh >> 1) */
	unsigned char         freqNoise[MAX_NUM_NOISE_FLOOR_BANDS+1];
	unsigned char         freqLimiter[MAX_QMF_BANDS / 2 + MAX_NUM_PATCHES];		/* max (intermediate) size = nLow + numPatches - 1 */

	unsigned char         numPatches;
	unsigned char         patchNumSubbands[MAX_NUM_PATCHES + 1];
	unsigned char         patchStartSubband[MAX_NUM_PATCHES + 1];
} SBRFreq;

typedef struct _SBRChan {
	int                   reset;
	unsigned char         deltaFlagEnv[MAX_NUM_ENV];
	unsigned char         deltaFlagNoise[MAX_NUM_NOISE_FLOORS];

	signed char           envDataQuant[MAX_NUM_ENV][MAX_QMF_BANDS];		/* range = [0, 127] */
	signed char           noiseDataQuant[MAX_NUM_NOISE_FLOORS][MAX_NUM_NOISE_FLOOR_BANDS];

	unsigned char         invfMode[2][MAX_NUM_NOISE_FLOOR_BANDS];	/* invfMode[0/1][band] = prev/curr */
	int                   chirpFact[MAX_NUM_NOISE_FLOOR_BANDS];		/* bwArray */
	unsigned char         addHarmonicFlag[2];						/* addHarmonicFlag[0/1] = prev/curr */
	unsigned char         addHarmonic[2][64];						/* addHarmonic[0/1][band] = prev/curr */
	
	int                   gbMask[2];	/* gbMask[0/1] = XBuf[0-31]/XBuf[32-39] */
	signed char           laPrev;

	int                   noiseTabIndex;
	int                   sinIndex;
	int                   gainNoiseIndex;
	int                   gTemp[MAX_NUM_SMOOTH_COEFS][MAX_QMF_BANDS];
	int                   qTemp[MAX_NUM_SMOOTH_COEFS][MAX_QMF_BANDS];

} SBRChan;

typedef struct _PSInfoSBR {
	/* save for entire file */
	int                   frameCount;
	int                   sampRateIdx;

	/* state info that must be saved for each channel */
	SBRHeader             sbrHdr[AAC_MAX_NCHANS];
	SBRGrid               sbrGrid[AAC_MAX_NCHANS];
	SBRFreq               sbrFreq[AAC_MAX_NCHANS];
	SBRChan               sbrChan[AAC_MAX_NCHANS];

	/* temp variables, no need to save between blocks */
	unsigned char         dataExtra;
	unsigned char         resBitsData;
	unsigned char         extendedDataPresent;
	int                   extendedDataSize;

	signed char           envDataDequantScale[MAX_NCHANS_ELEM][MAX_NUM_ENV];
	int                   envDataDequant[MAX_NCHANS_ELEM][MAX_NUM_ENV][MAX_QMF_BANDS];
	int                   noiseDataDequant[MAX_NCHANS_ELEM][MAX_NUM_NOISE_FLOORS][MAX_NUM_NOISE_FLOOR_BANDS];

	int                   eCurr[MAX_QMF_BANDS];
	unsigned char         eCurrExp[MAX_QMF_BANDS];
	unsigned char         eCurrExpMax;
	signed char           la;

	int                   crcCheckWord;
	int                   couplingFlag;
	int                   envBand;
	int                   eOMGainMax;
	int                   gainMax;
	int                   gainMaxFBits;
	int                   noiseFloorBand;
	int                   qp1Inv;
	int                   qqp1Inv;
	int                   sMapped;
	int                   sBand;
	int                   highBand;

	int                   sumEOrigMapped;
	int                   sumECurrGLim;
	int                   sumSM;
	int                   sumQM;
	int                   gLimBoost[MAX_QMF_BANDS];
	int                   qmLimBoost[MAX_QMF_BANDS];
	int                   smBoost[MAX_QMF_BANDS];

	int                   smBuf[MAX_QMF_BANDS];
	int                   qmLimBuf[MAX_QMF_BANDS];
	int                   gLimBuf[MAX_QMF_BANDS];
	int                   gLimFbits[MAX_QMF_BANDS];

	int                   gFiltLast[MAX_QMF_BANDS];
	int                   qFiltLast[MAX_QMF_BANDS];

	/* large buffers */
	int                   delayIdxQMFA[AAC_MAX_NCHANS];
	int                   delayQMFA[AAC_MAX_NCHANS][DELAY_SAMPS_QMFA];
	int                   delayIdxQMFS[AAC_MAX_NCHANS];
	int                   delayQMFS[AAC_MAX_NCHANS][DELAY_SAMPS_QMFS];
	int                   XBufDelay[AAC_MAX_NCHANS][HF_GEN][64][2];
	int                   XBuf[32+8][64][2];

} PSInfoSBR;

/* sbrfft.c */
void FFT32C(int *x);

/* sbrfreq.c */
int CalcFreqTables(SBRHeader *sbrHdr, SBRFreq *sbrFreq, int sampRateIdx);

/* sbrhfadj.c */
void AdjustHighFreq(PSInfoSBR *psi, SBRHeader *sbrHdr, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch);

/* sbrhfgen.c */
void GenerateHighFreq(PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch);

/* sbrhuff.c */
void DecodeSBREnvelope(BitStreamInfo *bsi, PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch);
void DecodeSBRNoise(BitStreamInfo *bsi, PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch);
void UncoupleSBREnvelope(PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChanR);
void UncoupleSBRNoise(PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChanR);

/* sbrmath.c */
int InvRNormalized(int r);
int RatioPowInv(int a, int b, int c);
int SqrtFix(int x, int fBitsIn, int *fBitsOut);

/* sbrqmf.c */
int QMFAnalysis(int *inbuf, int *delay, int *XBuf, int fBitsIn, int *delayIdx, int qmfaBands);
void QMFSynthesis(int *inbuf, int *delay, int *delayIdx, int qmfsBands, short *outbuf, int nChans);

/* sbrside.c */
int GetSampRateIdx(int sampRate);
int UnpackSBRHeader(BitStreamInfo *bsi, SBRHeader *sbrHdr);
void UnpackSBRSingleChannel(BitStreamInfo *bsi, PSInfoSBR *psi, int chOut);
void UnpackSBRChannelPair(BitStreamInfo *bsi, PSInfoSBR *psi, int chOut);

/* sbrtabs.c */
extern const unsigned char k0Tab[NUM_SAMPLE_RATES_SBR][16];
extern const unsigned char k2Tab[NUM_SAMPLE_RATES_SBR][14];
extern const unsigned char goalSBTab[NUM_SAMPLE_RATES_SBR];
extern const HuffInfo huffTabSBRInfo[10];
extern const signed short huffTabSBR[604];
extern const int log2Tab[65];
extern const int noiseTab[512*2];
extern const int cTabA[165];
extern const int cTabS[640];

#endif	/* _SBR_H */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * bitstream.c - bitstream parsing functions
 **************************************************************************************/

//#include "bitstream.h"

/**************************************************************************************
 * Function:    SetBitstreamPointer
 *
 * Description: initialize bitstream reader
 *
 * Inputs:      pointer to BitStreamInfo struct
 *              number of bytes in bitstream
 *              pointer to byte-aligned buffer of data to read from
 *
 * Outputs:     initialized bitstream info struct
 *
 * Return:      none
 **************************************************************************************/
void SetBitstreamPointer(BitStreamInfo *bsi, int nBytes, unsigned char *buf)
{
	/* init bitstream */
	bsi->bytePtr = buf;
	bsi->iCache = 0;		/* 4-byte unsigned int */
	bsi->cachedBits = 0;	/* i.e. zero bits in cache */
	bsi->nBytes = nBytes;
}

/**************************************************************************************
 * Function:    RefillBitstreamCache
 *
 * Description: read new data from bitstream buffer into 32-bit cache
 *
 * Inputs:      pointer to initialized BitStreamInfo struct
 *
 * Outputs:     updated bitstream info struct
 *
 * Return:      none
 *
 * Notes:       only call when iCache is completely drained (resets bitOffset to 0)
 *              always loads 4 new bytes except when bsi->nBytes < 4 (end of buffer)
 *              stores data as big-endian in cache, regardless of machine endian-ness
 **************************************************************************************/
//Optimized for REV16, REV32 (FB)
static __inline void RefillBitstreamCache(BitStreamInfo *bsi)
{
	int nBytes = bsi->nBytes;	
	if (nBytes >= 4) {
		/* optimize for common case, independent of machine endian-ness */
		/*
		bsi->iCache  = (*bsi->bytePtr++) << 24;
		bsi->iCache |= (*bsi->bytePtr++) << 16;
		bsi->iCache |= (*bsi->bytePtr++) <<  8;
		bsi->iCache |= (*bsi->bytePtr++);
		*/
	
		/* Optimize for ARM instead (FB)*/
		unsigned int *Ptr32;
		Ptr32 =(unsigned int*)bsi->bytePtr;
		bsi->iCache = REV32(*Ptr32);
		bsi->bytePtr+=4;
	
	
		bsi->cachedBits = 32;
		bsi->nBytes -= 4;
	} else if (nBytes == 2) { //FB	
		unsigned short *Ptr16;
		Ptr16 =(unsigned short*)bsi->bytePtr;
		bsi->iCache = REV16(*Ptr16);
		bsi->bytePtr +=2;	
		bsi->cachedBits = 16;
		bsi->nBytes -= 2;
			
	} /*else { //FB
		bsi->iCache = 0;
		while (nBytes--) {
			bsi->iCache |= (*bsi->bytePtr++);
			bsi->iCache <<= 8;
		}
		bsi->iCache <<= ((3 - bsi->nBytes)*8);
		bsi->cachedBits = 8*bsi->nBytes;
		bsi->nBytes = 0;
	} */
	else { //FB		
		bsi->iCache = (*bsi->bytePtr++) << 24;		
		bsi->cachedBits = 8;
		bsi->nBytes = 0;
	}
}

/**************************************************************************************
 * Function:    GetBits
 *
 * Description: get bits from bitstream, advance bitstream pointer
 *
 * Inputs:      pointer to initialized BitStreamInfo struct
 *              number of bits to get from bitstream
 *
 * Outputs:     updated bitstream info struct
 *
 * Return:      the next nBits bits of data from bitstream buffer
 *
 * Notes:       nBits must be in range [0, 31], nBits outside this range masked by 0x1f
 *              for speed, does not indicate error if you overrun bit buffer 
 *              if nBits == 0, returns 0
 **************************************************************************************/
unsigned int GetBits(BitStreamInfo *bsi, int nBits)
{
	unsigned int data, lowBits;

	nBits &= 0x1f;							/* nBits mod 32 to avoid unpredictable results like >> by negative amount */
	data = bsi->iCache >> (31 - nBits);		/* unsigned >> so zero-extend */
	data >>= 1;								/* do as >> 31, >> 1 so that nBits = 0 works okay (returns 0) */
	bsi->iCache <<= nBits;					/* left-justify cache */
	bsi->cachedBits -= nBits;				/* how many bits have we drawn from the cache so far */

	/* if we cross an int boundary, refill the cache */
	if (bsi->cachedBits < 0) {
		lowBits = -bsi->cachedBits;
		RefillBitstreamCache(bsi);
		data |= bsi->iCache >> (32 - lowBits);		/* get the low-order bits */
	
		bsi->cachedBits -= lowBits;			/* how many bits have we drawn from the cache so far */
		bsi->iCache <<= lowBits;			/* left-justify cache */
	}

	return data;
}

/**************************************************************************************
 * Function:    GetBitsNoAdvance
 *
 * Description: get bits from bitstream, do not advance bitstream pointer
 *
 * Inputs:      pointer to initialized BitStreamInfo struct
 *              number of bits to get from bitstream
 *
 * Outputs:     none (state of BitStreamInfo struct left unchanged) 
 *
 * Return:      the next nBits bits of data from bitstream buffer
 *
 * Notes:       nBits must be in range [0, 31], nBits outside this range masked by 0x1f
 *              for speed, does not indicate error if you overrun bit buffer 
 *              if nBits == 0, returns 0
 **************************************************************************************/
unsigned int GetBitsNoAdvance(BitStreamInfo *bsi, int nBits)
{
	unsigned char *buf;
	unsigned int data, iCache;
	signed int lowBits;

	nBits &= 0x1f;							/* nBits mod 32 to avoid unpredictable results like >> by negative amount */
	data = bsi->iCache >> (31 - nBits);		/* unsigned >> so zero-extend */
	data >>= 1;								/* do as >> 31, >> 1 so that nBits = 0 works okay (returns 0) */
	lowBits = nBits - bsi->cachedBits;		/* how many bits do we have left to read */

	/* if we cross an int boundary, read next bytes in buffer */
	if (lowBits > 0) {
		iCache = 0;
		buf = bsi->bytePtr;
		while (lowBits > 0) {
			iCache <<= 8;
			if (buf < bsi->bytePtr + bsi->nBytes)
				iCache |= (unsigned int)*buf++;
			lowBits -= 8;
		}
		lowBits = -lowBits;
		data |= iCache >> lowBits;
	}

	return data;
}

/**************************************************************************************
 * Function:    AdvanceBitstream
 *
 * Description: move bitstream pointer ahead
 *
 * Inputs:      pointer to initialized BitStreamInfo struct
 *              number of bits to advance bitstream
 *
 * Outputs:     updated bitstream info struct
 *
 * Return:      none
 *
 * Notes:       generally used following GetBitsNoAdvance(bsi, maxBits)
 **************************************************************************************/
void AdvanceBitstream(BitStreamInfo *bsi, int nBits)
{
	nBits &= 0x1f;
	if (nBits > bsi->cachedBits) {
		nBits -= bsi->cachedBits;
		RefillBitstreamCache(bsi);
	}
	bsi->iCache <<= nBits;
	bsi->cachedBits -= nBits;
}

/**************************************************************************************
 * Function:    CalcBitsUsed
 *
 * Description: calculate how many bits have been read from bitstream
 *
 * Inputs:      pointer to initialized BitStreamInfo struct
 *              pointer to start of bitstream buffer
 *              bit offset into first byte of startBuf (0-7) 
 *
 * Outputs:     none
 *
 * Return:      number of bits read from bitstream, as offset from startBuf:startOffset
 **************************************************************************************/
int CalcBitsUsed(BitStreamInfo *bsi, unsigned char *startBuf, int startOffset)
{
	int bitsUsed;

	bitsUsed  = (bsi->bytePtr - startBuf) * 8;
	bitsUsed -= bsi->cachedBits;
	bitsUsed -= startOffset;

	return bitsUsed;
}

/**************************************************************************************
 * Function:    ByteAlignBitstream
 *
 * Description: bump bitstream pointer to start of next byte
 *
 * Inputs:      pointer to initialized BitStreamInfo struct
 *
 * Outputs:     byte-aligned bitstream BitStreamInfo struct
 *
 * Return:      none
 *
 * Notes:       if bitstream is already byte-aligned, do nothing
 **************************************************************************************/
void ByteAlignBitstream(BitStreamInfo *bsi)
{
	int offset;

	offset = bsi->cachedBits & 0x07;
	AdvanceBitstream(bsi, offset);
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * buffers.c - allocation and deallocation of internal AAC decoder buffers
 **************************************************************************************/

//#ifdef USE_DEFAULT_STDLIB
#include <stdlib.h>
//#else
//#include "hlxclib/stdlib.h"
//#endif

//#include "coder.h"

/**************************************************************************************
 * Function:    ClearBuffer
 *
 * Description: fill buffer with 0's
 *
 * Inputs:      pointer to buffer
 *              number of bytes to fill with 0
 *
 * Outputs:     cleared buffer
 *
 * Return:      none
 *
 * Notes:       slow, platform-independent equivalent to memset(buf, 0, nBytes)
 **************************************************************************************/
#include <string.h>
 void ClearBuffer(void *buf, int nBytes)
{
/*	int i;
	unsigned char *cbuf = (unsigned char *)buf;

	for (i = 0; i < nBytes; i++)
		cbuf[i] = 0;

	return;
	*/
	memset(buf, 0, nBytes);
}

/**************************************************************************************
 * Function:    AllocateBuffers
 *
 * Description: allocate all the memory needed for the AAC decoder
 *
 * Inputs:      none
 *
 * Outputs:     none
 *
 * Return:      pointer to AACDecInfo structure, cleared to all 0's (except for
 *                pointer to platform-specific data structure)
 *
 * Notes:       if one or more mallocs fail, function frees any buffers already
 *                allocated before returning
 **************************************************************************************/
AACDecInfo *AllocateBuffers(void)
{
	AACDecInfo *aacDecInfo;

	aacDecInfo = (AACDecInfo *)malloc(sizeof(AACDecInfo));
	if (!aacDecInfo)
		return 0;
	ClearBuffer(aacDecInfo, sizeof(AACDecInfo));

	aacDecInfo->psInfoBase = malloc(sizeof(PSInfoBase));
	if (!aacDecInfo->psInfoBase) {
		FreeBuffers(aacDecInfo);
		return 0;
	}
	ClearBuffer(aacDecInfo->psInfoBase, sizeof(PSInfoBase));

	return aacDecInfo;
}

#ifndef SAFE_FREE
#define SAFE_FREE(x)	{if (x)	free(x);	(x) = 0;}	/* helper macro */
#endif

/**************************************************************************************
 * Function:    FreeBuffers
 *
 * Description: frees all the memory used by the AAC decoder
 *
 * Inputs:      pointer to initialized AACDecInfo structure
 *
 * Outputs:     none
 *
 * Return:      none
 *
 * Notes:       safe to call even if some buffers were not allocated (uses SAFE_FREE)
 **************************************************************************************/
void FreeBuffers(AACDecInfo *aacDecInfo)
{
	if (!aacDecInfo)
		return;

	SAFE_FREE(aacDecInfo->psInfoBase);
	SAFE_FREE(aacDecInfo);
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * February 2005
 *
 * trigtabs.c - tables of sin, cos, etc. for IMDCT
 **************************************************************************************/

//#include "coder.h"

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnarrowing"

const int cos4sin4tabOffset[NUM_IMDCT_SIZES] = {0, 128};

/* PreMultiply() tables
 * format = Q30 * 2^[-7, -10] for nmdct = [128, 1024] 
 * reordered for sequential access
 *
 * invM = -1.0 / nmdct;
 * for (i = 0; i < nmdct/4; i++) {
 *   angle = (i + 0.25) * M_PI / nmdct;
 *   x = invM * (cos(angle) + sin(angle));
 *   x = invM * sin(angle);
 * 
 *   angle = (nmdct/2 - 1 - i + 0.25) * M_PI / nmdct;
 *   x = invM * (cos(angle) + sin(angle));
 *   x = invM * sin(angle);
 * }
 */
const int cos4sin4tab[128 + 1024] = {
/* 128 - format = Q30 * 2^-7 */
0xbf9bc731, 0xff9b783c, 0xbed5332c, 0xc002c697, 0xbe112251, 0xfe096c8d, 0xbd4f9c30, 0xc00f1c4a, 
0xbc90a83f, 0xfc77ae5e, 0xbbd44dd9, 0xc0254e27, 0xbb1a9443, 0xfae67ba2, 0xba6382a6, 0xc04558c0, 
0xb9af200f, 0xf9561237, 0xb8fd7373, 0xc06f3726, 0xb84e83ac, 0xf7c6afdc, 0xb7a25779, 0xc0a2e2e3, 
0xb6f8f57c, 0xf6389228, 0xb652643e, 0xc0e05401, 0xb5aeaa2a, 0xf4abf67e, 0xb50dcd90, 0xc1278104, 
0xb46fd4a4, 0xf3211a07, 0xb3d4c57c, 0xc1785ef4, 0xb33ca614, 0xf19839a6, 0xb2a77c49, 0xc1d2e158, 
0xb2154dda, 0xf01191f3, 0xb186206b, 0xc236fa3b, 0xb0f9f981, 0xee8d5f29, 0xb070de82, 0xc2a49a2e, 
0xafead4b9, 0xed0bdd25, 0xaf67e14f, 0xc31bb049, 0xaee80952, 0xeb8d475b, 0xae6b51ae, 0xc39c2a2f, 
0xadf1bf34, 0xea11d8c8, 0xad7b5692, 0xc425f410, 0xad081c5a, 0xe899cbf1, 0xac9814fd, 0xc4b8f8ad, 
0xac2b44cc, 0xe7255ad1, 0xabc1aff9, 0xc555215a, 0xab5b5a96, 0xe5b4bed8, 0xaaf84896, 0xc5fa5603, 
0xaa987dca, 0xe44830dd, 0xaa3bfde3, 0xc6a87d2d, 0xa9e2cc73, 0xe2dfe917, 0xa98cece9, 0xc75f7bfe, 
0xa93a6296, 0xe17c1f15, 0xa8eb30a7, 0xc81f363d, 0xa89f5a2b, 0xe01d09b4, 0xa856e20e, 0xc8e78e5b, 
0xa811cb1b, 0xdec2df18, 0xa7d017fc, 0xc9b86572, 0xa791cb39, 0xdd6dd4a2, 0xa756e73a, 0xca919b4e, 
0xa71f6e43, 0xdc1e1ee9, 0xa6eb6279, 0xcb730e70, 0xa6bac5dc, 0xdad3f1b1, 0xa68d9a4c, 0xcc5c9c14, 
0xa663e188, 0xd98f7fe6, 0xa63d9d2b, 0xcd4e2037, 0xa61aceaf, 0xd850fb8e, 0xa5fb776b, 0xce47759a, 
0xa5df9894, 0xd71895c9, 0xa5c7333e, 0xcf4875ca, 0xa5b2485a, 0xd5e67ec1, 0xa5a0d8b5, 0xd050f926, 
0xa592e4fd, 0xd4bae5ab, 0xa5886dba, 0xd160d6e5, 0xa5817354, 0xd395f8ba, 0xa57df60f, 0xd277e518, 
/* 1024 - format = Q30 * 2^-10 */
0xbff3703e, 0xfff36f02, 0xbfda5824, 0xc0000b1a, 0xbfc149ed, 0xffc12b16, 0xbfa845a0, 0xc0003c74, 
0xbf8f4b3e, 0xff8ee750, 0xbf765acc, 0xc0009547, 0xbf5d744e, 0xff5ca3d0, 0xbf4497c8, 0xc0011594, 
0xbf2bc53d, 0xff2a60b4, 0xbf12fcb2, 0xc001bd5c, 0xbefa3e2a, 0xfef81e1d, 0xbee189a8, 0xc0028c9c, 
0xbec8df32, 0xfec5dc28, 0xbeb03eca, 0xc0038356, 0xbe97a875, 0xfe939af5, 0xbe7f1c36, 0xc004a188, 
0xbe669a10, 0xfe615aa3, 0xbe4e2209, 0xc005e731, 0xbe35b423, 0xfe2f1b50, 0xbe1d5062, 0xc0075452, 
0xbe04f6cb, 0xfdfcdd1d, 0xbdeca760, 0xc008e8e8, 0xbdd46225, 0xfdcaa027, 0xbdbc2720, 0xc00aa4f3, 
0xbda3f652, 0xfd98648d, 0xbd8bcfbf, 0xc00c8872, 0xbd73b36d, 0xfd662a70, 0xbd5ba15d, 0xc00e9364, 
0xbd439995, 0xfd33f1ed, 0xbd2b9c17, 0xc010c5c7, 0xbd13a8e7, 0xfd01bb24, 0xbcfbc00a, 0xc0131f9b, 
0xbce3e182, 0xfccf8634, 0xbccc0d53, 0xc015a0dd, 0xbcb44382, 0xfc9d533b, 0xbc9c8411, 0xc018498c, 
0xbc84cf05, 0xfc6b2259, 0xbc6d2461, 0xc01b19a7, 0xbc558428, 0xfc38f3ac, 0xbc3dee5f, 0xc01e112b, 
0xbc266309, 0xfc06c754, 0xbc0ee22a, 0xc0213018, 0xbbf76bc4, 0xfbd49d70, 0xbbdfffdd, 0xc024766a, 
0xbbc89e77, 0xfba2761e, 0xbbb14796, 0xc027e421, 0xbb99fb3e, 0xfb70517d, 0xbb82b972, 0xc02b7939, 
0xbb6b8235, 0xfb3e2fac, 0xbb54558d, 0xc02f35b1, 0xbb3d337b, 0xfb0c10cb, 0xbb261c04, 0xc0331986, 
0xbb0f0f2b, 0xfad9f4f8, 0xbaf80cf4, 0xc03724b6, 0xbae11561, 0xfaa7dc52, 0xbaca2878, 0xc03b573f, 
0xbab3463b, 0xfa75c6f8, 0xba9c6eae, 0xc03fb11d, 0xba85a1d4, 0xfa43b508, 0xba6edfb1, 0xc044324f, 
0xba582849, 0xfa11a6a3, 0xba417b9e, 0xc048dad1, 0xba2ad9b5, 0xf9df9be6, 0xba144291, 0xc04daaa1, 
0xb9fdb635, 0xf9ad94f0, 0xb9e734a4, 0xc052a1bb, 0xb9d0bde4, 0xf97b91e1, 0xb9ba51f6, 0xc057c01d, 
0xb9a3f0de, 0xf94992d7, 0xb98d9aa0, 0xc05d05c3, 0xb9774f3f, 0xf91797f0, 0xb9610ebe, 0xc06272aa, 
0xb94ad922, 0xf8e5a14d, 0xb934ae6d, 0xc06806ce, 0xb91e8ea3, 0xf8b3af0c, 0xb90879c7, 0xc06dc22e, 
0xb8f26fdc, 0xf881c14b, 0xb8dc70e7, 0xc073a4c3, 0xb8c67cea, 0xf84fd829, 0xb8b093ea, 0xc079ae8c, 
0xb89ab5e8, 0xf81df3c5, 0xb884e2e9, 0xc07fdf85, 0xb86f1af0, 0xf7ec143e, 0xb8595e00, 0xc08637a9, 
0xb843ac1d, 0xf7ba39b3, 0xb82e0549, 0xc08cb6f5, 0xb818698a, 0xf7886442, 0xb802d8e0, 0xc0935d64, 
0xb7ed5351, 0xf756940a, 0xb7d7d8df, 0xc09a2af3, 0xb7c2698e, 0xf724c92a, 0xb7ad0561, 0xc0a11f9d, 
0xb797ac5b, 0xf6f303c0, 0xb7825e80, 0xc0a83b5e, 0xb76d1bd2, 0xf6c143ec, 0xb757e455, 0xc0af7e33, 
0xb742b80d, 0xf68f89cb, 0xb72d96fd, 0xc0b6e815, 0xb7188127, 0xf65dd57d, 0xb7037690, 0xc0be7901, 
0xb6ee773a, 0xf62c2721, 0xb6d98328, 0xc0c630f2, 0xb6c49a5e, 0xf5fa7ed4, 0xb6afbce0, 0xc0ce0fe3, 
0xb69aeab0, 0xf5c8dcb6, 0xb68623d1, 0xc0d615cf, 0xb6716847, 0xf59740e5, 0xb65cb815, 0xc0de42b2, 
0xb648133e, 0xf565ab80, 0xb63379c5, 0xc0e69686, 0xb61eebae, 0xf5341ca5, 0xb60a68fb, 0xc0ef1147, 
0xb5f5f1b1, 0xf5029473, 0xb5e185d1, 0xc0f7b2ee, 0xb5cd255f, 0xf4d11308, 0xb5b8d05f, 0xc1007b77, 
0xb5a486d2, 0xf49f9884, 0xb59048be, 0xc1096add, 0xb57c1624, 0xf46e2504, 0xb567ef08, 0xc1128119, 
0xb553d36c, 0xf43cb8a7, 0xb53fc355, 0xc11bbe26, 0xb52bbec4, 0xf40b538b, 0xb517c5be, 0xc12521ff, 
0xb503d845, 0xf3d9f5cf, 0xb4eff65c, 0xc12eac9d, 0xb4dc2007, 0xf3a89f92, 0xb4c85548, 0xc1385dfb, 
0xb4b49622, 0xf37750f2, 0xb4a0e299, 0xc1423613, 0xb48d3ab0, 0xf3460a0d, 0xb4799e69, 0xc14c34df, 
0xb4660dc8, 0xf314cb02, 0xb45288cf, 0xc1565a58, 0xb43f0f82, 0xf2e393ef, 0xb42ba1e4, 0xc160a678, 
0xb4183ff7, 0xf2b264f2, 0xb404e9bf, 0xc16b193a, 0xb3f19f3e, 0xf2813e2a, 0xb3de6078, 0xc175b296, 
0xb3cb2d70, 0xf2501fb5, 0xb3b80628, 0xc1807285, 0xb3a4eaa4, 0xf21f09b1, 0xb391dae6, 0xc18b5903, 
0xb37ed6f1, 0xf1edfc3d, 0xb36bdec9, 0xc1966606, 0xb358f26f, 0xf1bcf777, 0xb34611e8, 0xc1a1998a, 
0xb3333d36, 0xf18bfb7d, 0xb320745c, 0xc1acf386, 0xb30db75d, 0xf15b086d, 0xb2fb063b, 0xc1b873f5, 
0xb2e860fa, 0xf12a1e66, 0xb2d5c79d, 0xc1c41ace, 0xb2c33a26, 0xf0f93d86, 0xb2b0b898, 0xc1cfe80a, 
0xb29e42f6, 0xf0c865ea, 0xb28bd943, 0xc1dbdba3, 0xb2797b82, 0xf09797b2, 0xb26729b5, 0xc1e7f591, 
0xb254e3e0, 0xf066d2fa, 0xb242aa05, 0xc1f435cc, 0xb2307c27, 0xf03617e2, 0xb21e5a49, 0xc2009c4e, 
0xb20c446d, 0xf0056687, 0xb1fa3a97, 0xc20d290d, 0xb1e83cc9, 0xefd4bf08, 0xb1d64b06, 0xc219dc03, 
0xb1c46551, 0xefa42181, 0xb1b28bad, 0xc226b528, 0xb1a0be1b, 0xef738e12, 0xb18efca0, 0xc233b473, 
0xb17d473d, 0xef4304d8, 0xb16b9df6, 0xc240d9de, 0xb15a00cd, 0xef1285f2, 0xb1486fc5, 0xc24e255e, 
0xb136eae1, 0xeee2117c, 0xb1257223, 0xc25b96ee, 0xb114058e, 0xeeb1a796, 0xb102a524, 0xc2692e83, 
0xb0f150e9, 0xee81485c, 0xb0e008e0, 0xc276ec16, 0xb0cecd09, 0xee50f3ed, 0xb0bd9d6a, 0xc284cf9f, 
0xb0ac7a03, 0xee20aa67, 0xb09b62d8, 0xc292d914, 0xb08a57eb, 0xedf06be6, 0xb079593f, 0xc2a1086d, 
0xb06866d7, 0xedc0388a, 0xb05780b5, 0xc2af5da2, 0xb046a6db, 0xed901070, 0xb035d94e, 0xc2bdd8a9, 
0xb025180e, 0xed5ff3b5, 0xb014631e, 0xc2cc7979, 0xb003ba82, 0xed2fe277, 0xaff31e3b, 0xc2db400a, 
0xafe28e4d, 0xecffdcd4, 0xafd20ab9, 0xc2ea2c53, 0xafc19383, 0xeccfe2ea, 0xafb128ad, 0xc2f93e4a, 
0xafa0ca39, 0xec9ff4d6, 0xaf90782a, 0xc30875e5, 0xaf803283, 0xec7012b5, 0xaf6ff945, 0xc317d31c, 
0xaf5fcc74, 0xec403ca5, 0xaf4fac12, 0xc32755e5, 0xaf3f9822, 0xec1072c4, 0xaf2f90a5, 0xc336fe37, 
0xaf1f959f, 0xebe0b52f, 0xaf0fa712, 0xc346cc07, 0xaeffc500, 0xebb10404, 0xaeefef6c, 0xc356bf4d, 
0xaee02658, 0xeb815f60, 0xaed069c7, 0xc366d7fd, 0xaec0b9bb, 0xeb51c760, 0xaeb11636, 0xc377160f, 
0xaea17f3b, 0xeb223c22, 0xae91f4cd, 0xc3877978, 0xae8276ed, 0xeaf2bdc3, 0xae73059f, 0xc398022f, 
0xae63a0e3, 0xeac34c60, 0xae5448be, 0xc3a8b028, 0xae44fd31, 0xea93e817, 0xae35be3f, 0xc3b9835a, 
0xae268be9, 0xea649105, 0xae176633, 0xc3ca7bba, 0xae084d1f, 0xea354746, 0xadf940ae, 0xc3db993e, 
0xadea40e4, 0xea060af9, 0xaddb4dc2, 0xc3ecdbdc, 0xadcc674b, 0xe9d6dc3b, 0xadbd8d82, 0xc3fe4388, 
0xadaec067, 0xe9a7bb28, 0xad9fffff, 0xc40fd037, 0xad914c4b, 0xe978a7dd, 0xad82a54c, 0xc42181e0, 
0xad740b07, 0xe949a278, 0xad657d7c, 0xc4335877, 0xad56fcaf, 0xe91aab16, 0xad4888a0, 0xc44553f2, 
0xad3a2153, 0xe8ebc1d3, 0xad2bc6ca, 0xc4577444, 0xad1d7907, 0xe8bce6cd, 0xad0f380c, 0xc469b963, 
0xad0103db, 0xe88e1a20, 0xacf2dc77, 0xc47c2344, 0xace4c1e2, 0xe85f5be9, 0xacd6b41e, 0xc48eb1db, 
0xacc8b32c, 0xe830ac45, 0xacbabf10, 0xc4a1651c, 0xacacd7cb, 0xe8020b52, 0xac9efd60, 0xc4b43cfd, 
0xac912fd1, 0xe7d3792b, 0xac836f1f, 0xc4c73972, 0xac75bb4d, 0xe7a4f5ed, 0xac68145d, 0xc4da5a6f, 
0xac5a7a52, 0xe77681b6, 0xac4ced2c, 0xc4ed9fe7, 0xac3f6cef, 0xe7481ca1, 0xac31f99d, 0xc50109d0, 
0xac249336, 0xe719c6cb, 0xac1739bf, 0xc514981d, 0xac09ed38, 0xe6eb8052, 0xabfcada3, 0xc5284ac3, 
0xabef7b04, 0xe6bd4951, 0xabe2555b, 0xc53c21b4, 0xabd53caa, 0xe68f21e5, 0xabc830f5, 0xc5501ce5, 
0xabbb323c, 0xe6610a2a, 0xabae4082, 0xc5643c4a, 0xaba15bc9, 0xe633023e, 0xab948413, 0xc5787fd6, 
0xab87b962, 0xe6050a3b, 0xab7afbb7, 0xc58ce77c, 0xab6e4b15, 0xe5d72240, 0xab61a77d, 0xc5a17330, 
0xab5510f3, 0xe5a94a67, 0xab488776, 0xc5b622e6, 0xab3c0b0b, 0xe57b82cd, 0xab2f9bb1, 0xc5caf690, 
0xab23396c, 0xe54dcb8f, 0xab16e43d, 0xc5dfee22, 0xab0a9c27, 0xe52024c9, 0xaafe612a, 0xc5f5098f, 
0xaaf23349, 0xe4f28e96, 0xaae61286, 0xc60a48c9, 0xaad9fee3, 0xe4c50914, 0xaacdf861, 0xc61fabc4, 
0xaac1ff03, 0xe497945d, 0xaab612ca, 0xc6353273, 0xaaaa33b8, 0xe46a308f, 0xaa9e61cf, 0xc64adcc7, 
0xaa929d10, 0xe43cddc4, 0xaa86e57e, 0xc660aab5, 0xaa7b3b1b, 0xe40f9c1a, 0xaa6f9de7, 0xc6769c2e, 
0xaa640de6, 0xe3e26bac, 0xaa588b18, 0xc68cb124, 0xaa4d157f, 0xe3b54c95, 0xaa41ad1e, 0xc6a2e98b, 
0xaa3651f6, 0xe3883ef2, 0xaa2b0409, 0xc6b94554, 0xaa1fc358, 0xe35b42df, 0xaa148fe6, 0xc6cfc472, 
0xaa0969b3, 0xe32e5876, 0xa9fe50c2, 0xc6e666d7, 0xa9f34515, 0xe3017fd5, 0xa9e846ad, 0xc6fd2c75, 
0xa9dd558b, 0xe2d4b916, 0xa9d271b2, 0xc714153e, 0xa9c79b23, 0xe2a80456, 0xa9bcd1e0, 0xc72b2123, 
0xa9b215ea, 0xe27b61af, 0xa9a76744, 0xc7425016, 0xa99cc5ee, 0xe24ed13d, 0xa99231eb, 0xc759a20a, 
0xa987ab3c, 0xe222531c, 0xa97d31e3, 0xc77116f0, 0xa972c5e1, 0xe1f5e768, 0xa9686738, 0xc788aeb9, 
0xa95e15e9, 0xe1c98e3b, 0xa953d1f7, 0xc7a06957, 0xa9499b62, 0xe19d47b1, 0xa93f722c, 0xc7b846ba, 
0xa9355658, 0xe17113e5, 0xa92b47e5, 0xc7d046d6, 0xa92146d7, 0xe144f2f3, 0xa917532e, 0xc7e8699a, 
0xa90d6cec, 0xe118e4f6, 0xa9039413, 0xc800aef7, 0xa8f9c8a4, 0xe0ecea09, 0xa8f00aa0, 0xc81916df, 
0xa8e65a0a, 0xe0c10247, 0xa8dcb6e2, 0xc831a143, 0xa8d3212a, 0xe0952dcb, 0xa8c998e3, 0xc84a4e14, 
0xa8c01e10, 0xe0696cb0, 0xa8b6b0b1, 0xc8631d42, 0xa8ad50c8, 0xe03dbf11, 0xa8a3fe57, 0xc87c0ebd, 
0xa89ab95e, 0xe012250a, 0xa89181df, 0xc8952278, 0xa88857dc, 0xdfe69eb4, 0xa87f3b57, 0xc8ae5862, 
0xa8762c4f, 0xdfbb2c2c, 0xa86d2ac8, 0xc8c7b06b, 0xa86436c2, 0xdf8fcd8b, 0xa85b503e, 0xc8e12a84, 
0xa852773f, 0xdf6482ed, 0xa849abc4, 0xc8fac69e, 0xa840edd1, 0xdf394c6b, 0xa8383d66, 0xc91484a8, 
0xa82f9a84, 0xdf0e2a22, 0xa827052d, 0xc92e6492, 0xa81e7d62, 0xdee31c2b, 0xa8160324, 0xc948664d, 
0xa80d9675, 0xdeb822a1, 0xa8053756, 0xc96289c9, 0xa7fce5c9, 0xde8d3d9e, 0xa7f4a1ce, 0xc97ccef5, 
0xa7ec6b66, 0xde626d3e, 0xa7e44294, 0xc99735c2, 0xa7dc2759, 0xde37b199, 0xa7d419b4, 0xc9b1be1e, 
0xa7cc19a9, 0xde0d0acc, 0xa7c42738, 0xc9cc67fa, 0xa7bc4262, 0xdde278ef, 0xa7b46b29, 0xc9e73346, 
0xa7aca18e, 0xddb7fc1e, 0xa7a4e591, 0xca021fef, 0xa79d3735, 0xdd8d9472, 0xa795967a, 0xca1d2de7, 
0xa78e0361, 0xdd634206, 0xa7867dec, 0xca385d1d, 0xa77f061c, 0xdd3904f4, 0xa7779bf2, 0xca53ad7e, 
0xa7703f70, 0xdd0edd55, 0xa768f095, 0xca6f1efc, 0xa761af64, 0xdce4cb44, 0xa75a7bdd, 0xca8ab184, 
0xa7535602, 0xdcbacedb, 0xa74c3dd4, 0xcaa66506, 0xa7453353, 0xdc90e834, 0xa73e3681, 0xcac23971, 
0xa7374760, 0xdc671768, 0xa73065ef, 0xcade2eb3, 0xa7299231, 0xdc3d5c91, 0xa722cc25, 0xcafa44bc, 
0xa71c13ce, 0xdc13b7c9, 0xa715692c, 0xcb167b79, 0xa70ecc41, 0xdbea292b, 0xa7083d0d, 0xcb32d2da, 
0xa701bb91, 0xdbc0b0ce, 0xa6fb47ce, 0xcb4f4acd, 0xa6f4e1c6, 0xdb974ece, 0xa6ee8979, 0xcb6be341, 
0xa6e83ee8, 0xdb6e0342, 0xa6e20214, 0xcb889c23, 0xa6dbd2ff, 0xdb44ce46, 0xa6d5b1a9, 0xcba57563, 
0xa6cf9e13, 0xdb1baff2, 0xa6c9983e, 0xcbc26eee, 0xa6c3a02b, 0xdaf2a860, 0xa6bdb5da, 0xcbdf88b3, 
0xa6b7d94e, 0xdac9b7a9, 0xa6b20a86, 0xcbfcc29f, 0xa6ac4984, 0xdaa0dde7, 0xa6a69649, 0xcc1a1ca0, 
0xa6a0f0d5, 0xda781b31, 0xa69b5929, 0xcc3796a5, 0xa695cf46, 0xda4f6fa3, 0xa690532d, 0xcc55309b, 
0xa68ae4df, 0xda26db54, 0xa685845c, 0xcc72ea70, 0xa68031a6, 0xd9fe5e5e, 0xa67aecbd, 0xcc90c412, 
0xa675b5a3, 0xd9d5f8d9, 0xa6708c57, 0xccaebd6e, 0xa66b70db, 0xd9adaadf, 0xa6666330, 0xccccd671, 
0xa6616355, 0xd9857489, 0xa65c714d, 0xcceb0f0a, 0xa6578d18, 0xd95d55ef, 0xa652b6b6, 0xcd096725, 
0xa64dee28, 0xd9354f2a, 0xa6493370, 0xcd27deb0, 0xa644868d, 0xd90d6053, 0xa63fe781, 0xcd467599, 
0xa63b564c, 0xd8e58982, 0xa636d2ee, 0xcd652bcb, 0xa6325d6a, 0xd8bdcad0, 0xa62df5bf, 0xcd840134, 
0xa6299bed, 0xd8962456, 0xa6254ff7, 0xcda2f5c2, 0xa62111db, 0xd86e962b, 0xa61ce19c, 0xcdc20960, 
0xa618bf39, 0xd8472069, 0xa614aab3, 0xcde13bfd, 0xa610a40c, 0xd81fc328, 0xa60cab43, 0xce008d84, 
0xa608c058, 0xd7f87e7f, 0xa604e34e, 0xce1ffde2, 0xa6011424, 0xd7d15288, 0xa5fd52db, 0xce3f8d05, 
0xa5f99f73, 0xd7aa3f5a, 0xa5f5f9ed, 0xce5f3ad8, 0xa5f2624a, 0xd783450d, 0xa5eed88a, 0xce7f0748, 
0xa5eb5cae, 0xd75c63ba, 0xa5e7eeb6, 0xce9ef241, 0xa5e48ea3, 0xd7359b78, 0xa5e13c75, 0xcebefbb0, 
0xa5ddf82d, 0xd70eec60, 0xa5dac1cb, 0xcedf2380, 0xa5d79950, 0xd6e85689, 0xa5d47ebc, 0xceff699f, 
0xa5d17210, 0xd6c1da0b, 0xa5ce734d, 0xcf1fcdf8, 0xa5cb8272, 0xd69b76fe, 0xa5c89f80, 0xcf405077, 
0xa5c5ca77, 0xd6752d79, 0xa5c30359, 0xcf60f108, 0xa5c04a25, 0xd64efd94, 0xa5bd9edc, 0xcf81af97, 
0xa5bb017f, 0xd628e767, 0xa5b8720d, 0xcfa28c10, 0xa5b5f087, 0xd602eb0a, 0xa5b37cee, 0xcfc3865e, 
0xa5b11741, 0xd5dd0892, 0xa5aebf82, 0xcfe49e6d, 0xa5ac75b0, 0xd5b74019, 0xa5aa39cd, 0xd005d42a, 
0xa5a80bd7, 0xd59191b5, 0xa5a5ebd0, 0xd027277e, 0xa5a3d9b8, 0xd56bfd7d, 0xa5a1d590, 0xd0489856, 
0xa59fdf57, 0xd5468389, 0xa59df70e, 0xd06a269d, 0xa59c1cb5, 0xd52123f0, 0xa59a504c, 0xd08bd23f, 
0xa59891d4, 0xd4fbdec9, 0xa596e14e, 0xd0ad9b26, 0xa5953eb8, 0xd4d6b42b, 0xa593aa14, 0xd0cf813e, 
0xa5922362, 0xd4b1a42c, 0xa590aaa2, 0xd0f18472, 0xa58f3fd4, 0xd48caee4, 0xa58de2f8, 0xd113a4ad, 
0xa58c940f, 0xd467d469, 0xa58b5319, 0xd135e1d9, 0xa58a2016, 0xd44314d3, 0xa588fb06, 0xd1583be2, 
0xa587e3ea, 0xd41e7037, 0xa586dac1, 0xd17ab2b3, 0xa585df8c, 0xd3f9e6ad, 0xa584f24b, 0xd19d4636, 
0xa58412fe, 0xd3d5784a, 0xa58341a5, 0xd1bff656, 0xa5827e40, 0xd3b12526, 0xa581c8d0, 0xd1e2c2fd, 
0xa5812154, 0xd38ced57, 0xa58087cd, 0xd205ac17, 0xa57ffc3b, 0xd368d0f3, 0xa57f7e9d, 0xd228b18d, 
0xa57f0ef5, 0xd344d011, 0xa57ead41, 0xd24bd34a, 0xa57e5982, 0xd320eac6, 0xa57e13b8, 0xd26f1138, 
0xa57ddbe4, 0xd2fd2129, 0xa57db204, 0xd2926b41, 0xa57d961a, 0xd2d97350, 0xa57d8825, 0xd2b5e151, 
};

/* PostMultiply() tables
 * format = Q30
 * reordered for sequential access
 * decimate (skip by 16 instead of 2) for small transform (128)
 *
 * for (i = 0; i <= (512/2); i++) {
 *   angle = i * M_PI / 1024;
 *   x = (cos(angle) + sin(angle));
 *   x = sin(angle);
 * }
 */
const int cos1sin1tab[514] = {
/* format = Q30 */
0x40000000, 0x00000000, 0x40323034, 0x003243f1, 0x406438cf, 0x006487c4, 0x409619b2, 0x0096cb58, 
0x40c7d2bd, 0x00c90e90, 0x40f963d3, 0x00fb514b, 0x412accd4, 0x012d936c, 0x415c0da3, 0x015fd4d2, 
0x418d2621, 0x0192155f, 0x41be162f, 0x01c454f5, 0x41eeddaf, 0x01f69373, 0x421f7c84, 0x0228d0bb, 
0x424ff28f, 0x025b0caf, 0x42803fb2, 0x028d472e, 0x42b063d0, 0x02bf801a, 0x42e05ecb, 0x02f1b755, 
0x43103085, 0x0323ecbe, 0x433fd8e1, 0x03562038, 0x436f57c1, 0x038851a2, 0x439ead09, 0x03ba80df, 
0x43cdd89a, 0x03ecadcf, 0x43fcda59, 0x041ed854, 0x442bb227, 0x0451004d, 0x445a5fe8, 0x0483259d, 
0x4488e37f, 0x04b54825, 0x44b73ccf, 0x04e767c5, 0x44e56bbd, 0x0519845e, 0x4513702a, 0x054b9dd3, 
0x454149fc, 0x057db403, 0x456ef916, 0x05afc6d0, 0x459c7d5a, 0x05e1d61b, 0x45c9d6af, 0x0613e1c5, 
0x45f704f7, 0x0645e9af, 0x46240816, 0x0677edbb, 0x4650dff1, 0x06a9edc9, 0x467d8c6d, 0x06dbe9bb, 
0x46aa0d6d, 0x070de172, 0x46d662d6, 0x073fd4cf, 0x47028c8d, 0x0771c3b3, 0x472e8a76, 0x07a3adff, 
0x475a5c77, 0x07d59396, 0x47860275, 0x08077457, 0x47b17c54, 0x08395024, 0x47dcc9f9, 0x086b26de, 
0x4807eb4b, 0x089cf867, 0x4832e02d, 0x08cec4a0, 0x485da887, 0x09008b6a, 0x4888443d, 0x09324ca7, 
0x48b2b335, 0x09640837, 0x48dcf556, 0x0995bdfd, 0x49070a84, 0x09c76dd8, 0x4930f2a6, 0x09f917ac, 
0x495aada2, 0x0a2abb59, 0x49843b5f, 0x0a5c58c0, 0x49ad9bc2, 0x0a8defc3, 0x49d6ceb3, 0x0abf8043, 
0x49ffd417, 0x0af10a22, 0x4a28abd6, 0x0b228d42, 0x4a5155d6, 0x0b540982, 0x4a79d1ff, 0x0b857ec7, 
0x4aa22036, 0x0bb6ecef, 0x4aca4065, 0x0be853de, 0x4af23270, 0x0c19b374, 0x4b19f641, 0x0c4b0b94, 
0x4b418bbe, 0x0c7c5c1e, 0x4b68f2cf, 0x0cada4f5, 0x4b902b5c, 0x0cdee5f9, 0x4bb7354d, 0x0d101f0e, 
0x4bde1089, 0x0d415013, 0x4c04bcf8, 0x0d7278eb, 0x4c2b3a84, 0x0da39978, 0x4c518913, 0x0dd4b19a, 
0x4c77a88e, 0x0e05c135, 0x4c9d98de, 0x0e36c82a, 0x4cc359ec, 0x0e67c65a, 0x4ce8eb9f, 0x0e98bba7, 
0x4d0e4de2, 0x0ec9a7f3, 0x4d33809c, 0x0efa8b20, 0x4d5883b7, 0x0f2b650f, 0x4d7d571c, 0x0f5c35a3, 
0x4da1fab5, 0x0f8cfcbe, 0x4dc66e6a, 0x0fbdba40, 0x4deab226, 0x0fee6e0d, 0x4e0ec5d1, 0x101f1807, 
0x4e32a956, 0x104fb80e, 0x4e565c9f, 0x10804e06, 0x4e79df95, 0x10b0d9d0, 0x4e9d3222, 0x10e15b4e, 
0x4ec05432, 0x1111d263, 0x4ee345ad, 0x11423ef0, 0x4f06067f, 0x1172a0d7, 0x4f289692, 0x11a2f7fc, 
0x4f4af5d1, 0x11d3443f, 0x4f6d2427, 0x12038584, 0x4f8f217e, 0x1233bbac, 0x4fb0edc1, 0x1263e699, 
0x4fd288dc, 0x1294062f, 0x4ff3f2bb, 0x12c41a4f, 0x50152b47, 0x12f422db, 0x5036326e, 0x13241fb6, 
0x50570819, 0x135410c3, 0x5077ac37, 0x1383f5e3, 0x50981eb1, 0x13b3cefa, 0x50b85f74, 0x13e39be9, 
0x50d86e6d, 0x14135c94, 0x50f84b87, 0x144310dd, 0x5117f6ae, 0x1472b8a5, 0x51376fd0, 0x14a253d1, 
0x5156b6d9, 0x14d1e242, 0x5175cbb5, 0x150163dc, 0x5194ae52, 0x1530d881, 0x51b35e9b, 0x15604013, 
0x51d1dc80, 0x158f9a76, 0x51f027eb, 0x15bee78c, 0x520e40cc, 0x15ee2738, 0x522c270f, 0x161d595d, 
0x5249daa2, 0x164c7ddd, 0x52675b72, 0x167b949d, 0x5284a96e, 0x16aa9d7e, 0x52a1c482, 0x16d99864, 
0x52beac9f, 0x17088531, 0x52db61b0, 0x173763c9, 0x52f7e3a6, 0x1766340f, 0x5314326d, 0x1794f5e6, 
0x53304df6, 0x17c3a931, 0x534c362d, 0x17f24dd3, 0x5367eb03, 0x1820e3b0, 0x53836c66, 0x184f6aab, 
0x539eba45, 0x187de2a7, 0x53b9d48f, 0x18ac4b87, 0x53d4bb34, 0x18daa52f, 0x53ef6e23, 0x1908ef82, 
0x5409ed4b, 0x19372a64, 0x5424389d, 0x196555b8, 0x543e5007, 0x19937161, 0x5458337a, 0x19c17d44, 
0x5471e2e6, 0x19ef7944, 0x548b5e3b, 0x1a1d6544, 0x54a4a56a, 0x1a4b4128, 0x54bdb862, 0x1a790cd4, 
0x54d69714, 0x1aa6c82b, 0x54ef4171, 0x1ad47312, 0x5507b76a, 0x1b020d6c, 0x551ff8ef, 0x1b2f971e, 
0x553805f2, 0x1b5d100a, 0x554fde64, 0x1b8a7815, 0x55678236, 0x1bb7cf23, 0x557ef15a, 0x1be51518, 
0x55962bc0, 0x1c1249d8, 0x55ad315b, 0x1c3f6d47, 0x55c4021d, 0x1c6c7f4a, 0x55da9df7, 0x1c997fc4, 
0x55f104dc, 0x1cc66e99, 0x560736bd, 0x1cf34baf, 0x561d338d, 0x1d2016e9, 0x5632fb3f, 0x1d4cd02c, 
0x56488dc5, 0x1d79775c, 0x565deb11, 0x1da60c5d, 0x56731317, 0x1dd28f15, 0x568805c9, 0x1dfeff67, 
0x569cc31b, 0x1e2b5d38, 0x56b14b00, 0x1e57a86d, 0x56c59d6a, 0x1e83e0eb, 0x56d9ba4e, 0x1eb00696, 
0x56eda1a0, 0x1edc1953, 0x57015352, 0x1f081907, 0x5714cf59, 0x1f340596, 0x572815a8, 0x1f5fdee6, 
0x573b2635, 0x1f8ba4dc, 0x574e00f2, 0x1fb7575c, 0x5760a5d5, 0x1fe2f64c, 0x577314d2, 0x200e8190, 
0x57854ddd, 0x2039f90f, 0x579750ec, 0x20655cac, 0x57a91df2, 0x2090ac4d, 0x57bab4e6, 0x20bbe7d8, 
0x57cc15bc, 0x20e70f32, 0x57dd406a, 0x21122240, 0x57ee34e5, 0x213d20e8, 0x57fef323, 0x21680b0f, 
0x580f7b19, 0x2192e09b, 0x581fccbc, 0x21bda171, 0x582fe804, 0x21e84d76, 0x583fcce6, 0x2212e492, 
0x584f7b58, 0x223d66a8, 0x585ef351, 0x2267d3a0, 0x586e34c7, 0x22922b5e, 0x587d3fb0, 0x22bc6dca, 
0x588c1404, 0x22e69ac8, 0x589ab1b9, 0x2310b23e, 0x58a918c6, 0x233ab414, 0x58b74923, 0x2364a02e, 
0x58c542c5, 0x238e7673, 0x58d305a6, 0x23b836ca, 0x58e091bd, 0x23e1e117, 0x58ede700, 0x240b7543, 
0x58fb0568, 0x2434f332, 0x5907eced, 0x245e5acc, 0x59149d87, 0x2487abf7, 0x5921172e, 0x24b0e699, 
0x592d59da, 0x24da0a9a, 0x59396584, 0x250317df, 0x59453a24, 0x252c0e4f, 0x5950d7b3, 0x2554edd1, 
0x595c3e2a, 0x257db64c, 0x59676d82, 0x25a667a7, 0x597265b4, 0x25cf01c8, 0x597d26b8, 0x25f78497, 
0x5987b08a, 0x261feffa, 0x59920321, 0x264843d9, 0x599c1e78, 0x2670801a, 0x59a60288, 0x2698a4a6, 
0x59afaf4c, 0x26c0b162, 0x59b924bc, 0x26e8a637, 0x59c262d5, 0x2710830c, 0x59cb698f, 0x273847c8, 
0x59d438e5, 0x275ff452, 0x59dcd0d3, 0x27878893, 0x59e53151, 0x27af0472, 0x59ed5a5c, 0x27d667d5, 
0x59f54bee, 0x27fdb2a7, 0x59fd0603, 0x2824e4cc, 0x5a048895, 0x284bfe2f, 0x5a0bd3a1, 0x2872feb6, 
0x5a12e720, 0x2899e64a, 0x5a19c310, 0x28c0b4d2, 0x5a20676c, 0x28e76a37, 0x5a26d42f, 0x290e0661, 
0x5a2d0957, 0x29348937, 0x5a3306de, 0x295af2a3, 0x5a38ccc2, 0x2981428c, 0x5a3e5afe, 0x29a778db, 
0x5a43b190, 0x29cd9578, 0x5a48d074, 0x29f3984c, 0x5a4db7a6, 0x2a19813f, 0x5a526725, 0x2a3f503a, 
0x5a56deec, 0x2a650525, 0x5a5b1efa, 0x2a8a9fea, 0x5a5f274b, 0x2ab02071, 0x5a62f7dd, 0x2ad586a3, 
0x5a6690ae, 0x2afad269, 0x5a69f1bb, 0x2b2003ac, 0x5a6d1b03, 0x2b451a55, 0x5a700c84, 0x2b6a164d, 
0x5a72c63b, 0x2b8ef77d, 0x5a754827, 0x2bb3bdce, 0x5a779246, 0x2bd8692b, 0x5a79a498, 0x2bfcf97c, 
0x5a7b7f1a, 0x2c216eaa, 0x5a7d21cc, 0x2c45c8a0, 0x5a7e8cac, 0x2c6a0746, 0x5a7fbfbb, 0x2c8e2a87, 
0x5a80baf6, 0x2cb2324c, 0x5a817e5d, 0x2cd61e7f, 0x5a8209f1, 0x2cf9ef09, 0x5a825db0, 0x2d1da3d5, 
0x5a82799a, 0x2d413ccd, 
};

const int sinWindowOffset[NUM_IMDCT_SIZES] = {0, 128};

/* Synthesis window - SIN
 * format = Q31 for nmdct = [128, 1024]
 * reordered for sequential access
 *
 * for (i = 0; i < nmdct/2; i++) {
 *   angle = (i + 0.5) * M_PI / (2.0 * nmdct);
 *   x = sin(angle);
 *
 *   angle = (nmdct - 1 - i + 0.5) * M_PI / (2.0 * nmdct);
 *   x = sin(angle);
 * }
 */
const int sinWindow[128 + 1024] = {
/* 128 - format = Q31 * 2^0 */
0x00c90f88, 0x7fff6216, 0x025b26d7, 0x7ffa72d1, 0x03ed26e6, 0x7ff09478, 0x057f0035, 0x7fe1c76b, 
0x0710a345, 0x7fce0c3e, 0x08a2009a, 0x7fb563b3, 0x0a3308bd, 0x7f97cebd, 0x0bc3ac35, 0x7f754e80, 
0x0d53db92, 0x7f4de451, 0x0ee38766, 0x7f2191b4, 0x1072a048, 0x7ef05860, 0x120116d5, 0x7eba3a39, 
0x138edbb1, 0x7e7f3957, 0x151bdf86, 0x7e3f57ff, 0x16a81305, 0x7dfa98a8, 0x183366e9, 0x7db0fdf8, 
0x19bdcbf3, 0x7d628ac6, 0x1b4732ef, 0x7d0f4218, 0x1ccf8cb3, 0x7cb72724, 0x1e56ca1e, 0x7c5a3d50, 
0x1fdcdc1b, 0x7bf88830, 0x2161b3a0, 0x7b920b89, 0x22e541af, 0x7b26cb4f, 0x24677758, 0x7ab6cba4, 
0x25e845b6, 0x7a4210d8, 0x27679df4, 0x79c89f6e, 0x28e5714b, 0x794a7c12, 0x2a61b101, 0x78c7aba2, 
0x2bdc4e6f, 0x78403329, 0x2d553afc, 0x77b417df, 0x2ecc681e, 0x77235f2d, 0x3041c761, 0x768e0ea6, 
0x31b54a5e, 0x75f42c0b, 0x3326e2c3, 0x7555bd4c, 0x34968250, 0x74b2c884, 0x36041ad9, 0x740b53fb, 
0x376f9e46, 0x735f6626, 0x38d8fe93, 0x72af05a7, 0x3a402dd2, 0x71fa3949, 0x3ba51e29, 0x71410805, 
0x3d07c1d6, 0x708378ff, 0x3e680b2c, 0x6fc19385, 0x3fc5ec98, 0x6efb5f12, 0x4121589b, 0x6e30e34a, 
0x427a41d0, 0x6d6227fa, 0x43d09aed, 0x6c8f351c, 0x452456bd, 0x6bb812d1, 0x46756828, 0x6adcc964, 
0x47c3c22f, 0x69fd614a, 0x490f57ee, 0x6919e320, 0x4a581c9e, 0x683257ab, 0x4b9e0390, 0x6746c7d8, 
0x4ce10034, 0x66573cbb, 0x4e210617, 0x6563bf92, 0x4f5e08e3, 0x646c59bf, 0x5097fc5e, 0x637114cc, 
0x51ced46e, 0x6271fa69, 0x53028518, 0x616f146c, 0x5433027d, 0x60686ccf, 0x556040e2, 0x5f5e0db3, 
0x568a34a9, 0x5e50015d, 0x57b0d256, 0x5d3e5237, 0x58d40e8c, 0x5c290acc, 0x59f3de12, 0x5b1035cf, 
/* 1024 - format = Q31 * 2^0 */
0x001921fb, 0x7ffffd88, 0x004b65ee, 0x7fffe9cb, 0x007da9d4, 0x7fffc251, 0x00afeda8, 0x7fff8719, 
0x00e23160, 0x7fff3824, 0x011474f6, 0x7ffed572, 0x0146b860, 0x7ffe5f03, 0x0178fb99, 0x7ffdd4d7, 
0x01ab3e97, 0x7ffd36ee, 0x01dd8154, 0x7ffc8549, 0x020fc3c6, 0x7ffbbfe6, 0x024205e8, 0x7ffae6c7, 
0x027447b0, 0x7ff9f9ec, 0x02a68917, 0x7ff8f954, 0x02d8ca16, 0x7ff7e500, 0x030b0aa4, 0x7ff6bcf0, 
0x033d4abb, 0x7ff58125, 0x036f8a51, 0x7ff4319d, 0x03a1c960, 0x7ff2ce5b, 0x03d407df, 0x7ff1575d, 
0x040645c7, 0x7fefcca4, 0x04388310, 0x7fee2e30, 0x046abfb3, 0x7fec7c02, 0x049cfba7, 0x7feab61a, 
0x04cf36e5, 0x7fe8dc78, 0x05017165, 0x7fe6ef1c, 0x0533ab20, 0x7fe4ee06, 0x0565e40d, 0x7fe2d938, 
0x05981c26, 0x7fe0b0b1, 0x05ca5361, 0x7fde7471, 0x05fc89b8, 0x7fdc247a, 0x062ebf22, 0x7fd9c0ca, 
0x0660f398, 0x7fd74964, 0x06932713, 0x7fd4be46, 0x06c5598a, 0x7fd21f72, 0x06f78af6, 0x7fcf6ce8, 
0x0729bb4e, 0x7fcca6a7, 0x075bea8c, 0x7fc9ccb2, 0x078e18a7, 0x7fc6df08, 0x07c04598, 0x7fc3dda9, 
0x07f27157, 0x7fc0c896, 0x08249bdd, 0x7fbd9fd0, 0x0856c520, 0x7fba6357, 0x0888ed1b, 0x7fb7132b, 
0x08bb13c5, 0x7fb3af4e, 0x08ed3916, 0x7fb037bf, 0x091f5d06, 0x7facac7f, 0x09517f8f, 0x7fa90d8e, 
0x0983a0a7, 0x7fa55aee, 0x09b5c048, 0x7fa1949e, 0x09e7de6a, 0x7f9dbaa0, 0x0a19fb04, 0x7f99ccf4, 
0x0a4c1610, 0x7f95cb9a, 0x0a7e2f85, 0x7f91b694, 0x0ab0475c, 0x7f8d8de1, 0x0ae25d8d, 0x7f895182, 
0x0b147211, 0x7f850179, 0x0b4684df, 0x7f809dc5, 0x0b7895f0, 0x7f7c2668, 0x0baaa53b, 0x7f779b62, 
0x0bdcb2bb, 0x7f72fcb4, 0x0c0ebe66, 0x7f6e4a5e, 0x0c40c835, 0x7f698461, 0x0c72d020, 0x7f64aabf, 
0x0ca4d620, 0x7f5fbd77, 0x0cd6da2d, 0x7f5abc8a, 0x0d08dc3f, 0x7f55a7fa, 0x0d3adc4e, 0x7f507fc7, 
0x0d6cda53, 0x7f4b43f2, 0x0d9ed646, 0x7f45f47b, 0x0dd0d01f, 0x7f409164, 0x0e02c7d7, 0x7f3b1aad, 
0x0e34bd66, 0x7f359057, 0x0e66b0c3, 0x7f2ff263, 0x0e98a1e9, 0x7f2a40d2, 0x0eca90ce, 0x7f247ba5, 
0x0efc7d6b, 0x7f1ea2dc, 0x0f2e67b8, 0x7f18b679, 0x0f604faf, 0x7f12b67c, 0x0f923546, 0x7f0ca2e7, 
0x0fc41876, 0x7f067bba, 0x0ff5f938, 0x7f0040f6, 0x1027d784, 0x7ef9f29d, 0x1059b352, 0x7ef390ae, 
0x108b8c9b, 0x7eed1b2c, 0x10bd6356, 0x7ee69217, 0x10ef377d, 0x7edff570, 0x11210907, 0x7ed94538, 
0x1152d7ed, 0x7ed28171, 0x1184a427, 0x7ecbaa1a, 0x11b66dad, 0x7ec4bf36, 0x11e83478, 0x7ebdc0c6, 
0x1219f880, 0x7eb6aeca, 0x124bb9be, 0x7eaf8943, 0x127d7829, 0x7ea85033, 0x12af33ba, 0x7ea1039b, 
0x12e0ec6a, 0x7e99a37c, 0x1312a230, 0x7e922fd6, 0x13445505, 0x7e8aa8ac, 0x137604e2, 0x7e830dff, 
0x13a7b1bf, 0x7e7b5fce, 0x13d95b93, 0x7e739e1d, 0x140b0258, 0x7e6bc8eb, 0x143ca605, 0x7e63e03b, 
0x146e4694, 0x7e5be40c, 0x149fe3fc, 0x7e53d462, 0x14d17e36, 0x7e4bb13c, 0x1503153a, 0x7e437a9c, 
0x1534a901, 0x7e3b3083, 0x15663982, 0x7e32d2f4, 0x1597c6b7, 0x7e2a61ed, 0x15c95097, 0x7e21dd73, 
0x15fad71b, 0x7e194584, 0x162c5a3b, 0x7e109a24, 0x165dd9f0, 0x7e07db52, 0x168f5632, 0x7dff0911, 
0x16c0cef9, 0x7df62362, 0x16f2443e, 0x7ded2a47, 0x1723b5f9, 0x7de41dc0, 0x17552422, 0x7ddafdce, 
0x17868eb3, 0x7dd1ca75, 0x17b7f5a3, 0x7dc883b4, 0x17e958ea, 0x7dbf298d, 0x181ab881, 0x7db5bc02, 
0x184c1461, 0x7dac3b15, 0x187d6c82, 0x7da2a6c6, 0x18aec0db, 0x7d98ff17, 0x18e01167, 0x7d8f4409, 
0x19115e1c, 0x7d85759f, 0x1942a6f3, 0x7d7b93da, 0x1973ebe6, 0x7d719eba, 0x19a52ceb, 0x7d679642, 
0x19d669fc, 0x7d5d7a74, 0x1a07a311, 0x7d534b50, 0x1a38d823, 0x7d4908d9, 0x1a6a0929, 0x7d3eb30f, 
0x1a9b361d, 0x7d3449f5, 0x1acc5ef6, 0x7d29cd8c, 0x1afd83ad, 0x7d1f3dd6, 0x1b2ea43a, 0x7d149ad5, 
0x1b5fc097, 0x7d09e489, 0x1b90d8bb, 0x7cff1af5, 0x1bc1ec9e, 0x7cf43e1a, 0x1bf2fc3a, 0x7ce94dfb, 
0x1c240786, 0x7cde4a98, 0x1c550e7c, 0x7cd333f3, 0x1c861113, 0x7cc80a0f, 0x1cb70f43, 0x7cbcccec, 
0x1ce80906, 0x7cb17c8d, 0x1d18fe54, 0x7ca618f3, 0x1d49ef26, 0x7c9aa221, 0x1d7adb73, 0x7c8f1817, 
0x1dabc334, 0x7c837ad8, 0x1ddca662, 0x7c77ca65, 0x1e0d84f5, 0x7c6c06c0, 0x1e3e5ee5, 0x7c602fec, 
0x1e6f342c, 0x7c5445e9, 0x1ea004c1, 0x7c4848ba, 0x1ed0d09d, 0x7c3c3860, 0x1f0197b8, 0x7c3014de, 
0x1f325a0b, 0x7c23de35, 0x1f63178f, 0x7c179467, 0x1f93d03c, 0x7c0b3777, 0x1fc4840a, 0x7bfec765, 
0x1ff532f2, 0x7bf24434, 0x2025dcec, 0x7be5ade6, 0x205681f1, 0x7bd9047c, 0x208721f9, 0x7bcc47fa, 
0x20b7bcfe, 0x7bbf7860, 0x20e852f6, 0x7bb295b0, 0x2118e3dc, 0x7ba59fee, 0x21496fa7, 0x7b989719, 
0x2179f64f, 0x7b8b7b36, 0x21aa77cf, 0x7b7e4c45, 0x21daf41d, 0x7b710a49, 0x220b6b32, 0x7b63b543, 
0x223bdd08, 0x7b564d36, 0x226c4996, 0x7b48d225, 0x229cb0d5, 0x7b3b4410, 0x22cd12bd, 0x7b2da2fa, 
0x22fd6f48, 0x7b1feee5, 0x232dc66d, 0x7b1227d3, 0x235e1826, 0x7b044dc7, 0x238e646a, 0x7af660c2, 
0x23beab33, 0x7ae860c7, 0x23eeec78, 0x7ada4dd8, 0x241f2833, 0x7acc27f7, 0x244f5e5c, 0x7abdef25, 
0x247f8eec, 0x7aafa367, 0x24afb9da, 0x7aa144bc, 0x24dfdf20, 0x7a92d329, 0x250ffeb7, 0x7a844eae, 
0x25401896, 0x7a75b74f, 0x25702cb7, 0x7a670d0d, 0x25a03b11, 0x7a584feb, 0x25d0439f, 0x7a497feb, 
0x26004657, 0x7a3a9d0f, 0x26304333, 0x7a2ba75a, 0x26603a2c, 0x7a1c9ece, 0x26902b39, 0x7a0d836d, 
0x26c01655, 0x79fe5539, 0x26effb76, 0x79ef1436, 0x271fda96, 0x79dfc064, 0x274fb3ae, 0x79d059c8, 
0x277f86b5, 0x79c0e062, 0x27af53a6, 0x79b15435, 0x27df1a77, 0x79a1b545, 0x280edb23, 0x79920392, 
0x283e95a1, 0x79823f20, 0x286e49ea, 0x797267f2, 0x289df7f8, 0x79627e08, 0x28cd9fc1, 0x79528167, 
0x28fd4140, 0x79427210, 0x292cdc6d, 0x79325006, 0x295c7140, 0x79221b4b, 0x298bffb2, 0x7911d3e2, 
0x29bb87bc, 0x790179cd, 0x29eb0957, 0x78f10d0f, 0x2a1a847b, 0x78e08dab, 0x2a49f920, 0x78cffba3, 
0x2a796740, 0x78bf56f9, 0x2aa8ced3, 0x78ae9fb0, 0x2ad82fd2, 0x789dd5cb, 0x2b078a36, 0x788cf94c, 
0x2b36ddf7, 0x787c0a36, 0x2b662b0e, 0x786b088c, 0x2b957173, 0x7859f44f, 0x2bc4b120, 0x7848cd83, 
0x2bf3ea0d, 0x7837942b, 0x2c231c33, 0x78264849, 0x2c52478a, 0x7814e9df, 0x2c816c0c, 0x780378f1, 
0x2cb089b1, 0x77f1f581, 0x2cdfa071, 0x77e05f91, 0x2d0eb046, 0x77ceb725, 0x2d3db928, 0x77bcfc3f, 
0x2d6cbb10, 0x77ab2ee2, 0x2d9bb5f6, 0x77994f11, 0x2dcaa9d5, 0x77875cce, 0x2df996a3, 0x7775581d, 
0x2e287c5a, 0x776340ff, 0x2e575af3, 0x77511778, 0x2e863267, 0x773edb8b, 0x2eb502ae, 0x772c8d3a, 
0x2ee3cbc1, 0x771a2c88, 0x2f128d99, 0x7707b979, 0x2f41482e, 0x76f5340e, 0x2f6ffb7a, 0x76e29c4b, 
0x2f9ea775, 0x76cff232, 0x2fcd4c19, 0x76bd35c7, 0x2ffbe95d, 0x76aa670d, 0x302a7f3a, 0x76978605, 
0x30590dab, 0x768492b4, 0x308794a6, 0x76718d1c, 0x30b61426, 0x765e7540, 0x30e48c22, 0x764b4b23, 
0x3112fc95, 0x76380ec8, 0x31416576, 0x7624c031, 0x316fc6be, 0x76115f63, 0x319e2067, 0x75fdec60, 
0x31cc7269, 0x75ea672a, 0x31fabcbd, 0x75d6cfc5, 0x3228ff5c, 0x75c32634, 0x32573a3f, 0x75af6a7b, 
0x32856d5e, 0x759b9c9b, 0x32b398b3, 0x7587bc98, 0x32e1bc36, 0x7573ca75, 0x330fd7e1, 0x755fc635, 
0x333debab, 0x754bafdc, 0x336bf78f, 0x7537876c, 0x3399fb85, 0x75234ce8, 0x33c7f785, 0x750f0054, 
0x33f5eb89, 0x74faa1b3, 0x3423d78a, 0x74e63108, 0x3451bb81, 0x74d1ae55, 0x347f9766, 0x74bd199f, 
0x34ad6b32, 0x74a872e8, 0x34db36df, 0x7493ba34, 0x3508fa66, 0x747eef85, 0x3536b5be, 0x746a12df, 
0x356468e2, 0x74552446, 0x359213c9, 0x744023bc, 0x35bfb66e, 0x742b1144, 0x35ed50c9, 0x7415ece2, 
0x361ae2d3, 0x7400b69a, 0x36486c86, 0x73eb6e6e, 0x3675edd9, 0x73d61461, 0x36a366c6, 0x73c0a878, 
0x36d0d746, 0x73ab2ab4, 0x36fe3f52, 0x73959b1b, 0x372b9ee3, 0x737ff9ae, 0x3758f5f2, 0x736a4671, 
0x37864477, 0x73548168, 0x37b38a6d, 0x733eaa96, 0x37e0c7cc, 0x7328c1ff, 0x380dfc8d, 0x7312c7a5, 
0x383b28a9, 0x72fcbb8c, 0x38684c19, 0x72e69db7, 0x389566d6, 0x72d06e2b, 0x38c278d9, 0x72ba2cea, 
0x38ef821c, 0x72a3d9f7, 0x391c8297, 0x728d7557, 0x39497a43, 0x7276ff0d, 0x39766919, 0x7260771b, 
0x39a34f13, 0x7249dd86, 0x39d02c2a, 0x72333251, 0x39fd0056, 0x721c7580, 0x3a29cb91, 0x7205a716, 
0x3a568dd4, 0x71eec716, 0x3a834717, 0x71d7d585, 0x3aaff755, 0x71c0d265, 0x3adc9e86, 0x71a9bdba, 
0x3b093ca3, 0x71929789, 0x3b35d1a5, 0x717b5fd3, 0x3b625d86, 0x7164169d, 0x3b8ee03e, 0x714cbbeb, 
0x3bbb59c7, 0x71354fc0, 0x3be7ca1a, 0x711dd220, 0x3c143130, 0x7106430e, 0x3c408f03, 0x70eea28e, 
0x3c6ce38a, 0x70d6f0a4, 0x3c992ec0, 0x70bf2d53, 0x3cc5709e, 0x70a7589f, 0x3cf1a91c, 0x708f728b, 
0x3d1dd835, 0x70777b1c, 0x3d49fde1, 0x705f7255, 0x3d761a19, 0x70475839, 0x3da22cd7, 0x702f2ccd, 
0x3dce3614, 0x7016f014, 0x3dfa35c8, 0x6ffea212, 0x3e262bee, 0x6fe642ca, 0x3e52187f, 0x6fcdd241, 
0x3e7dfb73, 0x6fb5507a, 0x3ea9d4c3, 0x6f9cbd79, 0x3ed5a46b, 0x6f841942, 0x3f016a61, 0x6f6b63d8, 
0x3f2d26a0, 0x6f529d40, 0x3f58d921, 0x6f39c57d, 0x3f8481dd, 0x6f20dc92, 0x3fb020ce, 0x6f07e285, 
0x3fdbb5ec, 0x6eeed758, 0x40074132, 0x6ed5bb10, 0x4032c297, 0x6ebc8db0, 0x405e3a16, 0x6ea34f3d, 
0x4089a7a8, 0x6e89ffb9, 0x40b50b46, 0x6e709f2a, 0x40e064ea, 0x6e572d93, 0x410bb48c, 0x6e3daaf8, 
0x4136fa27, 0x6e24175c, 0x416235b2, 0x6e0a72c5, 0x418d6729, 0x6df0bd35, 0x41b88e84, 0x6dd6f6b1, 
0x41e3abbc, 0x6dbd1f3c, 0x420ebecb, 0x6da336dc, 0x4239c7aa, 0x6d893d93, 0x4264c653, 0x6d6f3365, 
0x428fbabe, 0x6d551858, 0x42baa4e6, 0x6d3aec6e, 0x42e584c3, 0x6d20afac, 0x43105a50, 0x6d066215, 
0x433b2585, 0x6cec03af, 0x4365e65b, 0x6cd1947c, 0x43909ccd, 0x6cb71482, 0x43bb48d4, 0x6c9c83c3, 
0x43e5ea68, 0x6c81e245, 0x44108184, 0x6c67300b, 0x443b0e21, 0x6c4c6d1a, 0x44659039, 0x6c319975, 
0x449007c4, 0x6c16b521, 0x44ba74bd, 0x6bfbc021, 0x44e4d71c, 0x6be0ba7b, 0x450f2edb, 0x6bc5a431, 
0x45397bf4, 0x6baa7d49, 0x4563be60, 0x6b8f45c7, 0x458df619, 0x6b73fdae, 0x45b82318, 0x6b58a503, 
0x45e24556, 0x6b3d3bcb, 0x460c5cce, 0x6b21c208, 0x46366978, 0x6b0637c1, 0x46606b4e, 0x6aea9cf8, 
0x468a624a, 0x6acef1b2, 0x46b44e65, 0x6ab335f4, 0x46de2f99, 0x6a9769c1, 0x470805df, 0x6a7b8d1e, 
0x4731d131, 0x6a5fa010, 0x475b9188, 0x6a43a29a, 0x478546de, 0x6a2794c1, 0x47aef12c, 0x6a0b7689, 
0x47d8906d, 0x69ef47f6, 0x48022499, 0x69d3090e, 0x482badab, 0x69b6b9d3, 0x48552b9b, 0x699a5a4c, 
0x487e9e64, 0x697dea7b, 0x48a805ff, 0x69616a65, 0x48d16265, 0x6944da10, 0x48fab391, 0x6928397e, 
0x4923f97b, 0x690b88b5, 0x494d341e, 0x68eec7b9, 0x49766373, 0x68d1f68f, 0x499f8774, 0x68b5153a, 
0x49c8a01b, 0x689823bf, 0x49f1ad61, 0x687b2224, 0x4a1aaf3f, 0x685e106c, 0x4a43a5b0, 0x6840ee9b, 
0x4a6c90ad, 0x6823bcb7, 0x4a957030, 0x68067ac3, 0x4abe4433, 0x67e928c5, 0x4ae70caf, 0x67cbc6c0, 
0x4b0fc99d, 0x67ae54ba, 0x4b387af9, 0x6790d2b6, 0x4b6120bb, 0x677340ba, 0x4b89badd, 0x67559eca, 
0x4bb24958, 0x6737ecea, 0x4bdacc28, 0x671a2b20, 0x4c034345, 0x66fc596f, 0x4c2baea9, 0x66de77dc, 
0x4c540e4e, 0x66c0866d, 0x4c7c622d, 0x66a28524, 0x4ca4aa41, 0x66847408, 0x4ccce684, 0x6666531d, 
0x4cf516ee, 0x66482267, 0x4d1d3b7a, 0x6629e1ec, 0x4d455422, 0x660b91af, 0x4d6d60df, 0x65ed31b5, 
0x4d9561ac, 0x65cec204, 0x4dbd5682, 0x65b0429f, 0x4de53f5a, 0x6591b38c, 0x4e0d1c30, 0x657314cf, 
0x4e34ecfc, 0x6554666d, 0x4e5cb1b9, 0x6535a86b, 0x4e846a60, 0x6516dacd, 0x4eac16eb, 0x64f7fd98, 
0x4ed3b755, 0x64d910d1, 0x4efb4b96, 0x64ba147d, 0x4f22d3aa, 0x649b08a0, 0x4f4a4f89, 0x647bed3f, 
0x4f71bf2e, 0x645cc260, 0x4f992293, 0x643d8806, 0x4fc079b1, 0x641e3e38, 0x4fe7c483, 0x63fee4f8, 
0x500f0302, 0x63df7c4d, 0x50363529, 0x63c0043b, 0x505d5af1, 0x63a07cc7, 0x50847454, 0x6380e5f6, 
0x50ab814d, 0x63613fcd, 0x50d281d5, 0x63418a50, 0x50f975e6, 0x6321c585, 0x51205d7b, 0x6301f171, 
0x5147388c, 0x62e20e17, 0x516e0715, 0x62c21b7e, 0x5194c910, 0x62a219aa, 0x51bb7e75, 0x628208a1, 
0x51e22740, 0x6261e866, 0x5208c36a, 0x6241b8ff, 0x522f52ee, 0x62217a72, 0x5255d5c5, 0x62012cc2, 
0x527c4bea, 0x61e0cff5, 0x52a2b556, 0x61c06410, 0x52c91204, 0x619fe918, 0x52ef61ee, 0x617f5f12, 
0x5315a50e, 0x615ec603, 0x533bdb5d, 0x613e1df0, 0x536204d7, 0x611d66de, 0x53882175, 0x60fca0d2, 
0x53ae3131, 0x60dbcbd1, 0x53d43406, 0x60bae7e1, 0x53fa29ed, 0x6099f505, 0x542012e1, 0x6078f344, 
0x5445eedb, 0x6057e2a2, 0x546bbdd7, 0x6036c325, 0x54917fce, 0x601594d1, 0x54b734ba, 0x5ff457ad, 
0x54dcdc96, 0x5fd30bbc, 0x5502775c, 0x5fb1b104, 0x55280505, 0x5f90478a, 0x554d858d, 0x5f6ecf53, 
0x5572f8ed, 0x5f4d4865, 0x55985f20, 0x5f2bb2c5, 0x55bdb81f, 0x5f0a0e77, 0x55e303e6, 0x5ee85b82, 
0x5608426e, 0x5ec699e9, 0x562d73b2, 0x5ea4c9b3, 0x565297ab, 0x5e82eae5, 0x5677ae54, 0x5e60fd84, 
0x569cb7a8, 0x5e3f0194, 0x56c1b3a1, 0x5e1cf71c, 0x56e6a239, 0x5dfade20, 0x570b8369, 0x5dd8b6a7, 
0x5730572e, 0x5db680b4, 0x57551d80, 0x5d943c4e, 0x5779d65b, 0x5d71e979, 0x579e81b8, 0x5d4f883b, 
0x57c31f92, 0x5d2d189a, 0x57e7afe4, 0x5d0a9a9a, 0x580c32a7, 0x5ce80e41, 0x5830a7d6, 0x5cc57394, 
0x58550f6c, 0x5ca2ca99, 0x58796962, 0x5c801354, 0x589db5b3, 0x5c5d4dcc, 0x58c1f45b, 0x5c3a7a05, 
0x58e62552, 0x5c179806, 0x590a4893, 0x5bf4a7d2, 0x592e5e19, 0x5bd1a971, 0x595265df, 0x5bae9ce7, 
0x59765fde, 0x5b8b8239, 0x599a4c12, 0x5b68596d, 0x59be2a74, 0x5b452288, 0x59e1faff, 0x5b21dd90, 
0x5a05bdae, 0x5afe8a8b, 0x5a29727b, 0x5adb297d, 0x5a4d1960, 0x5ab7ba6c, 0x5a70b258, 0x5a943d5e, 
};

const int kbdWindowOffset[NUM_IMDCT_SIZES] = {0, 128};

/* Synthesis window - KBD
 * format = Q31 for nmdct = [128, 1024]
 * reordered for sequential access
 *
 * aacScaleFact = -sqrt(1.0 / (2.0 * nmdct));
 * for (i = 0; i < nmdct/2; i++) {
 *   x = kbdWindowRef[i] * aacScaleFact;
 *   x = kbdWindowRef[nmdct - 1 - i] * aacScaleFact;
 * }
 * Note: see below for code to generate kbdWindowRef[]
 */
const int kbdWindow[128 + 1024] = {
/* 128 - format = Q31 * 2^0 */
0x00016f63, 0x7ffffffe, 0x0003e382, 0x7ffffff1, 0x00078f64, 0x7fffffc7, 0x000cc323, 0x7fffff5d, 
0x0013d9ed, 0x7ffffe76, 0x001d3a9d, 0x7ffffcaa, 0x0029581f, 0x7ffff953, 0x0038b1bd, 0x7ffff372, 
0x004bd34d, 0x7fffe98b, 0x00635538, 0x7fffd975, 0x007fdc64, 0x7fffc024, 0x00a219f1, 0x7fff995b, 
0x00cacad0, 0x7fff5f5b, 0x00fab72d, 0x7fff0a75, 0x0132b1af, 0x7ffe9091, 0x01739689, 0x7ffde49e, 
0x01be4a63, 0x7ffcf5ef, 0x0213b910, 0x7ffbaf84, 0x0274d41e, 0x7ff9f73a, 0x02e2913a, 0x7ff7acf1, 
0x035de86c, 0x7ff4a99a, 0x03e7d233, 0x7ff0be3d, 0x0481457c, 0x7febb2f1, 0x052b357c, 0x7fe545d4, 
0x05e68f77, 0x7fdd2a02, 0x06b4386f, 0x7fd30695, 0x07950acb, 0x7fc675b4, 0x0889d3ef, 0x7fb703be, 
0x099351e0, 0x7fa42e89, 0x0ab230e0, 0x7f8d64d8, 0x0be70923, 0x7f7205f8, 0x0d325c93, 0x7f516195, 
0x0e9494ae, 0x7f2ab7d0, 0x100e0085, 0x7efd3997, 0x119ed2ef, 0x7ec8094a, 0x134720d8, 0x7e8a3ba7, 
0x1506dfdc, 0x7e42d906, 0x16dde50b, 0x7df0dee4, 0x18cbe3f7, 0x7d9341b4, 0x1ad06e07, 0x7d28ef02, 
0x1ceaf215, 0x7cb0cfcc, 0x1f1abc4f, 0x7c29cb20, 0x215ef677, 0x7b92c8eb, 0x23b6a867, 0x7aeab4ec, 
0x2620b8ec, 0x7a3081d0, 0x289beef5, 0x79632c5a, 0x2b26f30b, 0x7881be95, 0x2dc0511f, 0x778b5304, 
0x30667aa2, 0x767f17c0, 0x3317c8dd, 0x755c5178, 0x35d27f98, 0x74225e50, 0x3894cff3, 0x72d0b887, 
0x3b5cdb7b, 0x7166f8e7, 0x3e28b770, 0x6fe4d8e8, 0x40f6702a, 0x6e4a3491, 0x43c40caa, 0x6c970bfc, 
0x468f9231, 0x6acb8483, 0x495707f5, 0x68e7e994, 0x4c187ac7, 0x66ecad1c, 0x4ed200c5, 0x64da6797, 
0x5181bcea, 0x62b1d7b7, 0x5425e28e, 0x6073e1ae, 0x56bcb8c2, 0x5e218e16, 0x59449d76, 0x5bbc0875, 
/* 1024 - format = Q31 * 2^0 */
0x0009962f, 0x7fffffa4, 0x000e16fb, 0x7fffff39, 0x0011ea65, 0x7ffffebf, 0x0015750e, 0x7ffffe34, 
0x0018dc74, 0x7ffffd96, 0x001c332e, 0x7ffffce5, 0x001f83f5, 0x7ffffc1f, 0x0022d59a, 0x7ffffb43, 
0x00262cc2, 0x7ffffa4f, 0x00298cc4, 0x7ffff942, 0x002cf81f, 0x7ffff81a, 0x003070c4, 0x7ffff6d6, 
0x0033f840, 0x7ffff573, 0x00378fd9, 0x7ffff3f1, 0x003b38a1, 0x7ffff24d, 0x003ef381, 0x7ffff085, 
0x0042c147, 0x7fffee98, 0x0046a2a8, 0x7fffec83, 0x004a9847, 0x7fffea44, 0x004ea2b7, 0x7fffe7d8, 
0x0052c283, 0x7fffe53f, 0x0056f829, 0x7fffe274, 0x005b4422, 0x7fffdf76, 0x005fa6dd, 0x7fffdc43, 
0x006420c8, 0x7fffd8d6, 0x0068b249, 0x7fffd52f, 0x006d5bc4, 0x7fffd149, 0x00721d9a, 0x7fffcd22, 
0x0076f828, 0x7fffc8b6, 0x007bebca, 0x7fffc404, 0x0080f8d9, 0x7fffbf06, 0x00861fae, 0x7fffb9bb, 
0x008b609e, 0x7fffb41e, 0x0090bbff, 0x7fffae2c, 0x00963224, 0x7fffa7e1, 0x009bc362, 0x7fffa13a, 
0x00a17009, 0x7fff9a32, 0x00a7386c, 0x7fff92c5, 0x00ad1cdc, 0x7fff8af0, 0x00b31da8, 0x7fff82ad, 
0x00b93b21, 0x7fff79f9, 0x00bf7596, 0x7fff70cf, 0x00c5cd57, 0x7fff672a, 0x00cc42b1, 0x7fff5d05, 
0x00d2d5f3, 0x7fff525c, 0x00d9876c, 0x7fff4729, 0x00e05769, 0x7fff3b66, 0x00e74638, 0x7fff2f10, 
0x00ee5426, 0x7fff221f, 0x00f58182, 0x7fff148e, 0x00fcce97, 0x7fff0658, 0x01043bb3, 0x7ffef776, 
0x010bc923, 0x7ffee7e2, 0x01137733, 0x7ffed795, 0x011b4631, 0x7ffec68a, 0x01233669, 0x7ffeb4ba, 
0x012b4827, 0x7ffea21d, 0x01337bb8, 0x7ffe8eac, 0x013bd167, 0x7ffe7a61, 0x01444982, 0x7ffe6533, 
0x014ce454, 0x7ffe4f1c, 0x0155a229, 0x7ffe3813, 0x015e834d, 0x7ffe2011, 0x0167880c, 0x7ffe070d, 
0x0170b0b2, 0x7ffdecff, 0x0179fd8b, 0x7ffdd1df, 0x01836ee1, 0x7ffdb5a2, 0x018d0500, 0x7ffd9842, 
0x0196c035, 0x7ffd79b3, 0x01a0a0ca, 0x7ffd59ee, 0x01aaa70a, 0x7ffd38e8, 0x01b4d341, 0x7ffd1697, 
0x01bf25b9, 0x7ffcf2f2, 0x01c99ebd, 0x7ffccdee, 0x01d43e99, 0x7ffca780, 0x01df0597, 0x7ffc7f9e, 
0x01e9f401, 0x7ffc563d, 0x01f50a22, 0x7ffc2b51, 0x02004844, 0x7ffbfecf, 0x020baeb1, 0x7ffbd0ab, 
0x02173db4, 0x7ffba0da, 0x0222f596, 0x7ffb6f4f, 0x022ed6a1, 0x7ffb3bfd, 0x023ae11f, 0x7ffb06d8, 
0x02471558, 0x7ffacfd3, 0x02537397, 0x7ffa96e0, 0x025ffc25, 0x7ffa5bf2, 0x026caf4a, 0x7ffa1efc, 
0x02798d4f, 0x7ff9dfee, 0x0286967c, 0x7ff99ebb, 0x0293cb1b, 0x7ff95b55, 0x02a12b72, 0x7ff915ab, 
0x02aeb7cb, 0x7ff8cdaf, 0x02bc706d, 0x7ff88351, 0x02ca559f, 0x7ff83682, 0x02d867a9, 0x7ff7e731, 
0x02e6a6d2, 0x7ff7954e, 0x02f51361, 0x7ff740c8, 0x0303ad9c, 0x7ff6e98e, 0x031275ca, 0x7ff68f8f, 
0x03216c30, 0x7ff632ba, 0x03309116, 0x7ff5d2fb, 0x033fe4bf, 0x7ff57042, 0x034f6773, 0x7ff50a7a, 
0x035f1975, 0x7ff4a192, 0x036efb0a, 0x7ff43576, 0x037f0c78, 0x7ff3c612, 0x038f4e02, 0x7ff35353, 
0x039fbfeb, 0x7ff2dd24, 0x03b06279, 0x7ff26370, 0x03c135ed, 0x7ff1e623, 0x03d23a8b, 0x7ff16527, 
0x03e37095, 0x7ff0e067, 0x03f4d84e, 0x7ff057cc, 0x040671f7, 0x7fefcb40, 0x04183dd3, 0x7fef3aad, 
0x042a3c22, 0x7feea5fa, 0x043c6d25, 0x7fee0d11, 0x044ed11d, 0x7fed6fda, 0x04616849, 0x7fecce3d, 
0x047432eb, 0x7fec2821, 0x04873140, 0x7feb7d6c, 0x049a6388, 0x7feace07, 0x04adca01, 0x7fea19d6, 
0x04c164ea, 0x7fe960c0, 0x04d53481, 0x7fe8a2aa, 0x04e93902, 0x7fe7df79, 0x04fd72aa, 0x7fe71712, 
0x0511e1b6, 0x7fe6495a, 0x05268663, 0x7fe57634, 0x053b60eb, 0x7fe49d83, 0x05507189, 0x7fe3bf2b, 
0x0565b879, 0x7fe2db0f, 0x057b35f4, 0x7fe1f110, 0x0590ea35, 0x7fe10111, 0x05a6d574, 0x7fe00af3, 
0x05bcf7ea, 0x7fdf0e97, 0x05d351cf, 0x7fde0bdd, 0x05e9e35c, 0x7fdd02a6, 0x0600acc8, 0x7fdbf2d2, 
0x0617ae48, 0x7fdadc40, 0x062ee814, 0x7fd9becf, 0x06465a62, 0x7fd89a5e, 0x065e0565, 0x7fd76eca, 
0x0675e954, 0x7fd63bf1, 0x068e0662, 0x7fd501b0, 0x06a65cc3, 0x7fd3bfe4, 0x06beecaa, 0x7fd2766a, 
0x06d7b648, 0x7fd1251e, 0x06f0b9d1, 0x7fcfcbda, 0x0709f775, 0x7fce6a7a, 0x07236f65, 0x7fcd00d8, 
0x073d21d2, 0x7fcb8ecf, 0x07570eea, 0x7fca1439, 0x077136dd, 0x7fc890ed, 0x078b99da, 0x7fc704c7, 
0x07a6380d, 0x7fc56f9d, 0x07c111a4, 0x7fc3d147, 0x07dc26cc, 0x7fc2299e, 0x07f777b1, 0x7fc07878, 
0x0813047d, 0x7fbebdac, 0x082ecd5b, 0x7fbcf90f, 0x084ad276, 0x7fbb2a78, 0x086713f7, 0x7fb951bc, 
0x08839206, 0x7fb76eaf, 0x08a04ccb, 0x7fb58126, 0x08bd446e, 0x7fb388f4, 0x08da7915, 0x7fb185ee, 
0x08f7eae7, 0x7faf77e5, 0x09159a09, 0x7fad5ead, 0x0933869f, 0x7fab3a17, 0x0951b0cd, 0x7fa909f6, 
0x097018b7, 0x7fa6ce1a, 0x098ebe7f, 0x7fa48653, 0x09ada248, 0x7fa23273, 0x09ccc431, 0x7f9fd249, 
0x09ec245b, 0x7f9d65a4, 0x0a0bc2e7, 0x7f9aec53, 0x0a2b9ff3, 0x7f986625, 0x0a4bbb9e, 0x7f95d2e7, 
0x0a6c1604, 0x7f933267, 0x0a8caf43, 0x7f908472, 0x0aad8776, 0x7f8dc8d5, 0x0ace9eb9, 0x7f8aff5c, 
0x0aeff526, 0x7f8827d3, 0x0b118ad8, 0x7f854204, 0x0b335fe6, 0x7f824dbb, 0x0b557469, 0x7f7f4ac3, 
0x0b77c879, 0x7f7c38e4, 0x0b9a5c2b, 0x7f7917e9, 0x0bbd2f97, 0x7f75e79b, 0x0be042d0, 0x7f72a7c3, 
0x0c0395ec, 0x7f6f5828, 0x0c2728fd, 0x7f6bf892, 0x0c4afc16, 0x7f6888c9, 0x0c6f0f4a, 0x7f650894, 
0x0c9362a8, 0x7f6177b9, 0x0cb7f642, 0x7f5dd5ff, 0x0cdcca26, 0x7f5a232a, 0x0d01de63, 0x7f565f00, 
0x0d273307, 0x7f528947, 0x0d4cc81f, 0x7f4ea1c2, 0x0d729db7, 0x7f4aa835, 0x0d98b3da, 0x7f469c65, 
0x0dbf0a92, 0x7f427e13, 0x0de5a1e9, 0x7f3e4d04, 0x0e0c79e7, 0x7f3a08f9, 0x0e339295, 0x7f35b1b4, 
0x0e5aebfa, 0x7f3146f8, 0x0e82861a, 0x7f2cc884, 0x0eaa60fd, 0x7f28361b, 0x0ed27ca5, 0x7f238f7c, 
0x0efad917, 0x7f1ed467, 0x0f237656, 0x7f1a049d, 0x0f4c5462, 0x7f151fdc, 0x0f75733d, 0x7f1025e3, 
0x0f9ed2e6, 0x7f0b1672, 0x0fc8735e, 0x7f05f146, 0x0ff254a1, 0x7f00b61d, 0x101c76ae, 0x7efb64b4, 
0x1046d981, 0x7ef5fcca, 0x10717d15, 0x7ef07e19, 0x109c6165, 0x7eeae860, 0x10c7866a, 0x7ee53b5b, 
0x10f2ec1e, 0x7edf76c4, 0x111e9279, 0x7ed99a58, 0x114a7971, 0x7ed3a5d1, 0x1176a0fc, 0x7ecd98eb, 
0x11a30910, 0x7ec77360, 0x11cfb1a1, 0x7ec134eb, 0x11fc9aa2, 0x7ebadd44, 0x1229c406, 0x7eb46c27, 
0x12572dbf, 0x7eade14c, 0x1284d7bc, 0x7ea73c6c, 0x12b2c1ed, 0x7ea07d41, 0x12e0ec42, 0x7e99a382, 
0x130f56a8, 0x7e92aee7, 0x133e010b, 0x7e8b9f2a, 0x136ceb59, 0x7e847402, 0x139c157b, 0x7e7d2d25, 
0x13cb7f5d, 0x7e75ca4c, 0x13fb28e6, 0x7e6e4b2d, 0x142b1200, 0x7e66af7f, 0x145b3a92, 0x7e5ef6f8, 
0x148ba281, 0x7e572150, 0x14bc49b4, 0x7e4f2e3b, 0x14ed300f, 0x7e471d70, 0x151e5575, 0x7e3eeea5, 
0x154fb9c9, 0x7e36a18e, 0x15815ced, 0x7e2e35e2, 0x15b33ec1, 0x7e25ab56, 0x15e55f25, 0x7e1d019e, 
0x1617bdf9, 0x7e14386e, 0x164a5b19, 0x7e0b4f7d, 0x167d3662, 0x7e02467e, 0x16b04fb2, 0x7df91d25, 
0x16e3a6e2, 0x7defd327, 0x17173bce, 0x7de66837, 0x174b0e4d, 0x7ddcdc0a, 0x177f1e39, 0x7dd32e53, 
0x17b36b69, 0x7dc95ec6, 0x17e7f5b3, 0x7dbf6d17, 0x181cbcec, 0x7db558f9, 0x1851c0e9, 0x7dab221f, 
0x1887017d, 0x7da0c83c, 0x18bc7e7c, 0x7d964b05, 0x18f237b6, 0x7d8baa2b, 0x19282cfd, 0x7d80e563, 
0x195e5e20, 0x7d75fc5e, 0x1994caee, 0x7d6aeed0, 0x19cb7335, 0x7d5fbc6d, 0x1a0256c2, 0x7d5464e6, 
0x1a397561, 0x7d48e7ef, 0x1a70cede, 0x7d3d453b, 0x1aa86301, 0x7d317c7c, 0x1ae03195, 0x7d258d65, 
0x1b183a63, 0x7d1977aa, 0x1b507d30, 0x7d0d3afc, 0x1b88f9c5, 0x7d00d710, 0x1bc1afe6, 0x7cf44b97, 
0x1bfa9f58, 0x7ce79846, 0x1c33c7e0, 0x7cdabcce, 0x1c6d293f, 0x7ccdb8e4, 0x1ca6c337, 0x7cc08c39, 
0x1ce0958a, 0x7cb33682, 0x1d1a9ff8, 0x7ca5b772, 0x1d54e240, 0x7c980ebd, 0x1d8f5c21, 0x7c8a3c14, 
0x1dca0d56, 0x7c7c3f2e, 0x1e04f59f, 0x7c6e17bc, 0x1e4014b4, 0x7c5fc573, 0x1e7b6a53, 0x7c514807, 
0x1eb6f633, 0x7c429f2c, 0x1ef2b80f, 0x7c33ca96, 0x1f2eaf9e, 0x7c24c9fa, 0x1f6adc98, 0x7c159d0d, 
0x1fa73eb2, 0x7c064383, 0x1fe3d5a3, 0x7bf6bd11, 0x2020a11e, 0x7be7096c, 0x205da0d8, 0x7bd7284a, 
0x209ad483, 0x7bc71960, 0x20d83bd1, 0x7bb6dc65, 0x2115d674, 0x7ba6710d, 0x2153a41b, 0x7b95d710, 
0x2191a476, 0x7b850e24, 0x21cfd734, 0x7b7415ff, 0x220e3c02, 0x7b62ee59, 0x224cd28d, 0x7b5196e9, 
0x228b9a82, 0x7b400f67, 0x22ca938a, 0x7b2e578a, 0x2309bd52, 0x7b1c6f0b, 0x23491783, 0x7b0a55a1, 
0x2388a1c4, 0x7af80b07, 0x23c85bbf, 0x7ae58ef5, 0x2408451a, 0x7ad2e124, 0x24485d7c, 0x7ac0014e, 
0x2488a48a, 0x7aacef2e, 0x24c919e9, 0x7a99aa7e, 0x2509bd3d, 0x7a8632f8, 0x254a8e29, 0x7a728858, 
0x258b8c50, 0x7a5eaa5a, 0x25ccb753, 0x7a4a98b9, 0x260e0ed3, 0x7a365333, 0x264f9271, 0x7a21d983, 
0x269141cb, 0x7a0d2b68, 0x26d31c80, 0x79f8489e, 0x2715222f, 0x79e330e4, 0x27575273, 0x79cde3f8, 
0x2799acea, 0x79b8619a, 0x27dc3130, 0x79a2a989, 0x281ededf, 0x798cbb85, 0x2861b591, 0x7976974e, 
0x28a4b4e0, 0x79603ca5, 0x28e7dc65, 0x7949ab4c, 0x292b2bb8, 0x7932e304, 0x296ea270, 0x791be390, 
0x29b24024, 0x7904acb3, 0x29f6046b, 0x78ed3e30, 0x2a39eed8, 0x78d597cc, 0x2a7dff02, 0x78bdb94a, 
0x2ac2347c, 0x78a5a270, 0x2b068eda, 0x788d5304, 0x2b4b0dae, 0x7874cacb, 0x2b8fb08a, 0x785c098d, 
0x2bd47700, 0x78430f11, 0x2c1960a1, 0x7829db1f, 0x2c5e6cfd, 0x78106d7f, 0x2ca39ba3, 0x77f6c5fb, 
0x2ce8ec23, 0x77dce45c, 0x2d2e5e0b, 0x77c2c86e, 0x2d73f0e8, 0x77a871fa, 0x2db9a449, 0x778de0cd, 
0x2dff77b8, 0x777314b2, 0x2e456ac4, 0x77580d78, 0x2e8b7cf6, 0x773ccaeb, 0x2ed1addb, 0x77214cdb, 
0x2f17fcfb, 0x77059315, 0x2f5e69e2, 0x76e99d69, 0x2fa4f419, 0x76cd6ba9, 0x2feb9b27, 0x76b0fda4, 
0x30325e96, 0x7694532e, 0x30793dee, 0x76776c17, 0x30c038b5, 0x765a4834, 0x31074e72, 0x763ce759, 
0x314e7eab, 0x761f4959, 0x3195c8e6, 0x76016e0b, 0x31dd2ca9, 0x75e35545, 0x3224a979, 0x75c4fedc, 
0x326c3ed8, 0x75a66aab, 0x32b3ec4d, 0x75879887, 0x32fbb159, 0x7568884b, 0x33438d81, 0x754939d1, 
0x338b8045, 0x7529acf4, 0x33d3892a, 0x7509e18e, 0x341ba7b1, 0x74e9d77d, 0x3463db5a, 0x74c98e9e, 
0x34ac23a7, 0x74a906cd, 0x34f48019, 0x74883fec, 0x353cf02f, 0x746739d8, 0x3585736a, 0x7445f472, 
0x35ce0949, 0x74246f9c, 0x3616b14c, 0x7402ab37, 0x365f6af0, 0x73e0a727, 0x36a835b5, 0x73be6350, 
0x36f11118, 0x739bdf95, 0x3739fc98, 0x73791bdd, 0x3782f7b2, 0x7356180e, 0x37cc01e3, 0x7332d410, 
0x38151aa8, 0x730f4fc9, 0x385e417e, 0x72eb8b24, 0x38a775e1, 0x72c7860a, 0x38f0b74d, 0x72a34066, 
0x393a053e, 0x727eba24, 0x39835f30, 0x7259f331, 0x39ccc49e, 0x7234eb79, 0x3a163503, 0x720fa2eb, 
0x3a5fafda, 0x71ea1977, 0x3aa9349e, 0x71c44f0c, 0x3af2c2ca, 0x719e439d, 0x3b3c59d7, 0x7177f71a, 
0x3b85f940, 0x71516978, 0x3bcfa07e, 0x712a9aaa, 0x3c194f0d, 0x71038aa4, 0x3c630464, 0x70dc395e, 
0x3cacbfff, 0x70b4a6cd, 0x3cf68155, 0x708cd2e9, 0x3d4047e1, 0x7064bdab, 0x3d8a131c, 0x703c670d, 
0x3dd3e27e, 0x7013cf0a, 0x3e1db580, 0x6feaf59c, 0x3e678b9b, 0x6fc1dac1, 0x3eb16449, 0x6f987e76, 
0x3efb3f01, 0x6f6ee0b9, 0x3f451b3d, 0x6f45018b, 0x3f8ef874, 0x6f1ae0eb, 0x3fd8d620, 0x6ef07edb, 
0x4022b3b9, 0x6ec5db5d, 0x406c90b7, 0x6e9af675, 0x40b66c93, 0x6e6fd027, 0x410046c5, 0x6e446879, 
0x414a1ec6, 0x6e18bf71, 0x4193f40d, 0x6decd517, 0x41ddc615, 0x6dc0a972, 0x42279455, 0x6d943c8d, 
0x42715e45, 0x6d678e71, 0x42bb235f, 0x6d3a9f2a, 0x4304e31a, 0x6d0d6ec5, 0x434e9cf1, 0x6cdffd4f, 
0x4398505b, 0x6cb24ad6, 0x43e1fcd1, 0x6c84576b, 0x442ba1cd, 0x6c56231c, 0x44753ec7, 0x6c27adfd, 
0x44bed33a, 0x6bf8f81e, 0x45085e9d, 0x6bca0195, 0x4551e06b, 0x6b9aca75, 0x459b581e, 0x6b6b52d5, 
0x45e4c52f, 0x6b3b9ac9, 0x462e2717, 0x6b0ba26b, 0x46777d52, 0x6adb69d3, 0x46c0c75a, 0x6aaaf11b, 
0x470a04a9, 0x6a7a385c, 0x475334b9, 0x6a493fb3, 0x479c5707, 0x6a18073d, 0x47e56b0c, 0x69e68f17, 
0x482e7045, 0x69b4d761, 0x4877662c, 0x6982e039, 0x48c04c3f, 0x6950a9c0, 0x490921f8, 0x691e341a, 
0x4951e6d5, 0x68eb7f67, 0x499a9a51, 0x68b88bcd, 0x49e33beb, 0x68855970, 0x4a2bcb1f, 0x6851e875, 
0x4a74476b, 0x681e3905, 0x4abcb04c, 0x67ea4b47, 0x4b050541, 0x67b61f63, 0x4b4d45c9, 0x6781b585, 
0x4b957162, 0x674d0dd6, 0x4bdd878c, 0x67182883, 0x4c2587c6, 0x66e305b8, 0x4c6d7190, 0x66ada5a5, 
0x4cb5446a, 0x66780878, 0x4cfcffd5, 0x66422e60, 0x4d44a353, 0x660c1790, 0x4d8c2e64, 0x65d5c439, 
0x4dd3a08c, 0x659f348e, 0x4e1af94b, 0x656868c3, 0x4e623825, 0x6531610d, 0x4ea95c9d, 0x64fa1da3, 
0x4ef06637, 0x64c29ebb, 0x4f375477, 0x648ae48d, 0x4f7e26e1, 0x6452ef53, 0x4fc4dcfb, 0x641abf46, 
0x500b7649, 0x63e254a2, 0x5051f253, 0x63a9afa2, 0x5098509f, 0x6370d083, 0x50de90b3, 0x6337b784, 
0x5124b218, 0x62fe64e3, 0x516ab455, 0x62c4d8e0, 0x51b096f3, 0x628b13bc, 0x51f6597b, 0x625115b8, 
0x523bfb78, 0x6216df18, 0x52817c72, 0x61dc701f, 0x52c6dbf5, 0x61a1c912, 0x530c198d, 0x6166ea36, 
0x535134c5, 0x612bd3d2, 0x53962d2a, 0x60f0862d, 0x53db024a, 0x60b50190, 0x541fb3b1, 0x60794644, 
0x546440ef, 0x603d5494, 0x54a8a992, 0x60012cca, 0x54eced2b, 0x5fc4cf33, 0x55310b48, 0x5f883c1c, 
0x5575037c, 0x5f4b73d2, 0x55b8d558, 0x5f0e76a5, 0x55fc806f, 0x5ed144e5, 0x56400452, 0x5e93dee1, 
0x56836096, 0x5e5644ec, 0x56c694cf, 0x5e187757, 0x5709a092, 0x5dda7677, 0x574c8374, 0x5d9c429f, 
0x578f3d0d, 0x5d5ddc24, 0x57d1ccf2, 0x5d1f435d, 0x581432bd, 0x5ce078a0, 0x58566e04, 0x5ca17c45, 
0x58987e63, 0x5c624ea4, 0x58da6372, 0x5c22f016, 0x591c1ccc, 0x5be360f6, 0x595daa0d, 0x5ba3a19f, 
0x599f0ad1, 0x5b63b26c, 0x59e03eb6, 0x5b2393ba, 0x5a214558, 0x5ae345e7, 0x5a621e56, 0x5aa2c951, 
};



/* bit reverse tables for FFT */

const int bitrevtabOffset[NUM_IMDCT_SIZES] = {0, 17};

const unsigned char bitrevtab[17 + 129] = {
/* nfft = 64 */
0x01, 0x08, 0x02, 0x04, 0x03, 0x0c, 0x05, 0x0a, 0x07, 0x0e, 0x0b, 0x0d, 0x00, 0x06, 0x09, 0x0f,
0x00,

/* nfft = 512 */
0x01, 0x40, 0x02, 0x20, 0x03, 0x60, 0x04, 0x10, 0x05, 0x50, 0x06, 0x30, 0x07, 0x70, 0x09, 0x48,
0x0a, 0x28, 0x0b, 0x68, 0x0c, 0x18, 0x0d, 0x58, 0x0e, 0x38, 0x0f, 0x78, 0x11, 0x44, 0x12, 0x24,
0x13, 0x64, 0x15, 0x54, 0x16, 0x34, 0x17, 0x74, 0x19, 0x4c, 0x1a, 0x2c, 0x1b, 0x6c, 0x1d, 0x5c,
0x1e, 0x3c, 0x1f, 0x7c, 0x21, 0x42, 0x23, 0x62, 0x25, 0x52, 0x26, 0x32, 0x27, 0x72, 0x29, 0x4a,
0x2b, 0x6a, 0x2d, 0x5a, 0x2e, 0x3a, 0x2f, 0x7a, 0x31, 0x46, 0x33, 0x66, 0x35, 0x56, 0x37, 0x76,
0x39, 0x4e, 0x3b, 0x6e, 0x3d, 0x5e, 0x3f, 0x7e, 0x43, 0x61, 0x45, 0x51, 0x47, 0x71, 0x4b, 0x69,
0x4d, 0x59, 0x4f, 0x79, 0x53, 0x65, 0x57, 0x75, 0x5b, 0x6d, 0x5f, 0x7d, 0x67, 0x73, 0x6f, 0x7b,
0x00, 0x08, 0x14, 0x1c, 0x22, 0x2a, 0x36, 0x3e, 0x41, 0x49, 0x55, 0x5d, 0x63, 0x6b, 0x77, 0x7f,
0x00,

};

const unsigned char uniqueIDTab[8] = {0x5f, 0x4b, 0x43, 0x5f, 0x5f, 0x4a, 0x52, 0x5f};

/* Twiddle tables for FFT
 * format = Q30
 * 
 * for (k = 4; k <= N/4; k <<= 1) {
 *   for (j = 0; j < k; j++) {
 *     double wr1, wi1, wr2, wi2, wr3, wi3;
 * 
 *     wr1 = cos(1.0 * M_PI * j / (2*k));
 *     wi1 = sin(1.0 * M_PI * j / (2*k));
 *     wr1 = (wr1 + wi1);
 *     wi1 = -wi1;
 * 
 *     wr2 = cos(2.0 * M_PI * j / (2*k));
 *     wi2 = sin(2.0 * M_PI * j / (2*k));
 *     wr2 = (wr2 + wi2);
 *     wi2 = -wi2;
 * 
 *     wr3 = cos(3.0 * M_PI * j / (2*k));
 *     wi3 = sin(3.0 * M_PI * j / (2*k));
 *     wr3 = (wr3 + wi3);
 *     wi3 = -wi3;
 * 
 *     if (k & 0xaaaaaaaa) {
 *       w_odd[iodd++] = (float)wr2;
 *       w_odd[iodd++] = (float)wi2;
 *       w_odd[iodd++] = (float)wr1;
 *       w_odd[iodd++] = (float)wi1;
 *       w_odd[iodd++] = (float)wr3;
 *       w_odd[iodd++] = (float)wi3;
 *     } else {
 *       w_even[ieven++] = (float)wr2;
 *       w_even[ieven++] = (float)wi2;
 *       w_even[ieven++] = (float)wr1;
 *       w_even[ieven++] = (float)wi1;
 *       w_even[ieven++] = (float)wr3;
 *       w_even[ieven++] = (float)wi3;
 *     }
 *   }
 * }
 */
const int twidTabOdd[8*6 + 32*6 + 128*6] = {
	0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x539eba45, 0xe7821d59, 
	0x4b418bbe, 0xf383a3e2, 0x58c542c5, 0xdc71898d, 0x5a82799a, 0xd2bec333, 0x539eba45, 0xe7821d59, 
	0x539eba45, 0xc4df2862, 0x539eba45, 0xc4df2862, 0x58c542c5, 0xdc71898d, 0x3248d382, 0xc13ad060, 
	0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 0x00000000, 0xd2bec333, 0x22a2f4f8, 0xc4df2862, 
	0x58c542c5, 0xcac933ae, 0xcdb72c7e, 0xf383a3e2, 0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 
	0xac6145bb, 0x187de2a7, 0xdd5d0b08, 0xe7821d59, 0x4b418bbe, 0xc13ad060, 0xa73abd3b, 0x3536cc52, 
	
	0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x45f704f7, 0xf9ba1651, 
	0x43103085, 0xfcdc1342, 0x48b2b335, 0xf69bf7c9, 0x4b418bbe, 0xf383a3e2, 0x45f704f7, 0xf9ba1651, 
	0x4fd288dc, 0xed6bf9d1, 0x4fd288dc, 0xed6bf9d1, 0x48b2b335, 0xf69bf7c9, 0x553805f2, 0xe4a2eff6, 
	0x539eba45, 0xe7821d59, 0x4b418bbe, 0xf383a3e2, 0x58c542c5, 0xdc71898d, 0x569cc31b, 0xe1d4a2c8, 
	0x4da1fab5, 0xf0730342, 0x5a6690ae, 0xd5052d97, 0x58c542c5, 0xdc71898d, 0x4fd288dc, 0xed6bf9d1, 
	0x5a12e720, 0xce86ff2a, 0x5a12e720, 0xd76619b6, 0x51d1dc80, 0xea70658a, 0x57cc15bc, 0xc91af976, 
	0x5a82799a, 0xd2bec333, 0x539eba45, 0xe7821d59, 0x539eba45, 0xc4df2862, 0x5a12e720, 0xce86ff2a, 
	0x553805f2, 0xe4a2eff6, 0x4da1fab5, 0xc1eb0209, 0x58c542c5, 0xcac933ae, 0x569cc31b, 0xe1d4a2c8, 
	0x45f704f7, 0xc04ee4b8, 0x569cc31b, 0xc78e9a1d, 0x57cc15bc, 0xdf18f0ce, 0x3cc85709, 0xc013bc39, 
	0x539eba45, 0xc4df2862, 0x58c542c5, 0xdc71898d, 0x3248d382, 0xc13ad060, 0x4fd288dc, 0xc2c17d52, 
	0x5987b08a, 0xd9e01006, 0x26b2a794, 0xc3bdbdf6, 0x4b418bbe, 0xc13ad060, 0x5a12e720, 0xd76619b6, 
	0x1a4608ab, 0xc78e9a1d, 0x45f704f7, 0xc04ee4b8, 0x5a6690ae, 0xd5052d97, 0x0d47d096, 0xcc983f70, 
	0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 0x00000000, 0xd2bec333, 0x396b3199, 0xc04ee4b8, 
	0x5a6690ae, 0xd09441bb, 0xf2b82f6a, 0xd9e01006, 0x3248d382, 0xc13ad060, 0x5a12e720, 0xce86ff2a, 
	0xe5b9f755, 0xe1d4a2c8, 0x2aaa7c7f, 0xc2c17d52, 0x5987b08a, 0xcc983f70, 0xd94d586c, 0xea70658a, 
	0x22a2f4f8, 0xc4df2862, 0x58c542c5, 0xcac933ae, 0xcdb72c7e, 0xf383a3e2, 0x1a4608ab, 0xc78e9a1d, 
	0x57cc15bc, 0xc91af976, 0xc337a8f7, 0xfcdc1342, 0x11a855df, 0xcac933ae, 0x569cc31b, 0xc78e9a1d, 
	0xba08fb09, 0x0645e9af, 0x08df1a8c, 0xce86ff2a, 0x553805f2, 0xc6250a18, 0xb25e054b, 0x0f8cfcbe, 
	0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 0xac6145bb, 0x187de2a7, 0xf720e574, 0xd76619b6, 
	0x51d1dc80, 0xc3bdbdf6, 0xa833ea44, 0x20e70f32, 0xee57aa21, 0xdc71898d, 0x4fd288dc, 0xc2c17d52, 
	0xa5ed18e0, 0x2899e64a, 0xe5b9f755, 0xe1d4a2c8, 0x4da1fab5, 0xc1eb0209, 0xa5996f52, 0x2f6bbe45, 
	0xdd5d0b08, 0xe7821d59, 0x4b418bbe, 0xc13ad060, 0xa73abd3b, 0x3536cc52, 0xd5558381, 0xed6bf9d1, 
	0x48b2b335, 0xc0b15502, 0xaac7fa0e, 0x39daf5e8, 0xcdb72c7e, 0xf383a3e2, 0x45f704f7, 0xc04ee4b8, 
	0xb02d7724, 0x3d3e82ae, 0xc694ce67, 0xf9ba1651, 0x43103085, 0xc013bc39, 0xb74d4ccb, 0x3f4eaafe, 
	
	0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x418d2621, 0xfe6deaa1, 
	0x40c7d2bd, 0xff36f170, 0x424ff28f, 0xfda4f351, 0x43103085, 0xfcdc1342, 0x418d2621, 0xfe6deaa1, 
	0x4488e37f, 0xfb4ab7db, 0x4488e37f, 0xfb4ab7db, 0x424ff28f, 0xfda4f351, 0x46aa0d6d, 0xf8f21e8e, 
	0x45f704f7, 0xf9ba1651, 0x43103085, 0xfcdc1342, 0x48b2b335, 0xf69bf7c9, 0x475a5c77, 0xf82a6c6a, 
	0x43cdd89a, 0xfc135231, 0x4aa22036, 0xf4491311, 0x48b2b335, 0xf69bf7c9, 0x4488e37f, 0xfb4ab7db, 
	0x4c77a88e, 0xf1fa3ecb, 0x49ffd417, 0xf50ef5de, 0x454149fc, 0xfa824bfd, 0x4e32a956, 0xefb047f2, 
	0x4b418bbe, 0xf383a3e2, 0x45f704f7, 0xf9ba1651, 0x4fd288dc, 0xed6bf9d1, 0x4c77a88e, 0xf1fa3ecb, 
	0x46aa0d6d, 0xf8f21e8e, 0x5156b6d9, 0xeb2e1dbe, 0x4da1fab5, 0xf0730342, 0x475a5c77, 0xf82a6c6a, 
	0x52beac9f, 0xe8f77acf, 0x4ec05432, 0xeeee2d9d, 0x4807eb4b, 0xf7630799, 0x5409ed4b, 0xe6c8d59c, 
	0x4fd288dc, 0xed6bf9d1, 0x48b2b335, 0xf69bf7c9, 0x553805f2, 0xe4a2eff6, 0x50d86e6d, 0xebeca36c, 
	0x495aada2, 0xf5d544a7, 0x56488dc5, 0xe28688a4, 0x51d1dc80, 0xea70658a, 0x49ffd417, 0xf50ef5de, 
	0x573b2635, 0xe0745b24, 0x52beac9f, 0xe8f77acf, 0x4aa22036, 0xf4491311, 0x580f7b19, 0xde6d1f65, 
	0x539eba45, 0xe7821d59, 0x4b418bbe, 0xf383a3e2, 0x58c542c5, 0xdc71898d, 0x5471e2e6, 0xe61086bc, 
	0x4bde1089, 0xf2beafed, 0x595c3e2a, 0xda8249b4, 0x553805f2, 0xe4a2eff6, 0x4c77a88e, 0xf1fa3ecb, 
	0x59d438e5, 0xd8a00bae, 0x55f104dc, 0xe3399167, 0x4d0e4de2, 0xf136580d, 0x5a2d0957, 0xd6cb76c9, 
	0x569cc31b, 0xe1d4a2c8, 0x4da1fab5, 0xf0730342, 0x5a6690ae, 0xd5052d97, 0x573b2635, 0xe0745b24, 
	0x4e32a956, 0xefb047f2, 0x5a80baf6, 0xd34dcdb4, 0x57cc15bc, 0xdf18f0ce, 0x4ec05432, 0xeeee2d9d, 
	0x5a7b7f1a, 0xd1a5ef90, 0x584f7b58, 0xddc29958, 0x4f4af5d1, 0xee2cbbc1, 0x5a56deec, 0xd00e2639, 
	0x58c542c5, 0xdc71898d, 0x4fd288dc, 0xed6bf9d1, 0x5a12e720, 0xce86ff2a, 0x592d59da, 0xdb25f566, 
	0x50570819, 0xecabef3d, 0x59afaf4c, 0xcd110216, 0x5987b08a, 0xd9e01006, 0x50d86e6d, 0xebeca36c, 
	0x592d59da, 0xcbacb0bf, 0x59d438e5, 0xd8a00bae, 0x5156b6d9, 0xeb2e1dbe, 0x588c1404, 0xca5a86c4, 
	0x5a12e720, 0xd76619b6, 0x51d1dc80, 0xea70658a, 0x57cc15bc, 0xc91af976, 0x5a43b190, 0xd6326a88, 
	0x5249daa2, 0xe9b38223, 0x56eda1a0, 0xc7ee77b3, 0x5a6690ae, 0xd5052d97, 0x52beac9f, 0xe8f77acf, 
	0x55f104dc, 0xc6d569be, 0x5a7b7f1a, 0xd3de9156, 0x53304df6, 0xe83c56cf, 0x54d69714, 0xc5d03118, 
	0x5a82799a, 0xd2bec333, 0x539eba45, 0xe7821d59, 0x539eba45, 0xc4df2862, 0x5a7b7f1a, 0xd1a5ef90, 
	0x5409ed4b, 0xe6c8d59c, 0x5249daa2, 0xc402a33c, 0x5a6690ae, 0xd09441bb, 0x5471e2e6, 0xe61086bc, 
	0x50d86e6d, 0xc33aee27, 0x5a43b190, 0xcf89e3e8, 0x54d69714, 0xe55937d5, 0x4f4af5d1, 0xc2884e6e, 
	0x5a12e720, 0xce86ff2a, 0x553805f2, 0xe4a2eff6, 0x4da1fab5, 0xc1eb0209, 0x59d438e5, 0xcd8bbb6d, 
	0x55962bc0, 0xe3edb628, 0x4bde1089, 0xc1633f8a, 0x5987b08a, 0xcc983f70, 0x55f104dc, 0xe3399167, 
	0x49ffd417, 0xc0f1360b, 0x592d59da, 0xcbacb0bf, 0x56488dc5, 0xe28688a4, 0x4807eb4b, 0xc0950d1d, 
	0x58c542c5, 0xcac933ae, 0x569cc31b, 0xe1d4a2c8, 0x45f704f7, 0xc04ee4b8, 0x584f7b58, 0xc9edeb50, 
	0x56eda1a0, 0xe123e6ad, 0x43cdd89a, 0xc01ed535, 0x57cc15bc, 0xc91af976, 0x573b2635, 0xe0745b24, 
	0x418d2621, 0xc004ef3f, 0x573b2635, 0xc8507ea7, 0x57854ddd, 0xdfc606f1, 0x3f35b59d, 0xc0013bd3, 
	0x569cc31b, 0xc78e9a1d, 0x57cc15bc, 0xdf18f0ce, 0x3cc85709, 0xc013bc39, 0x55f104dc, 0xc6d569be, 
	0x580f7b19, 0xde6d1f65, 0x3a45e1f7, 0xc03c6a07, 0x553805f2, 0xc6250a18, 0x584f7b58, 0xddc29958, 
	0x37af354c, 0xc07b371e, 0x5471e2e6, 0xc57d965d, 0x588c1404, 0xdd196538, 0x350536f1, 0xc0d00db6, 
	0x539eba45, 0xc4df2862, 0x58c542c5, 0xdc71898d, 0x3248d382, 0xc13ad060, 0x52beac9f, 0xc449d892, 
	0x58fb0568, 0xdbcb0cce, 0x2f7afdfc, 0xc1bb5a11, 0x51d1dc80, 0xc3bdbdf6, 0x592d59da, 0xdb25f566, 
	0x2c9caf6c, 0xc2517e31, 0x50d86e6d, 0xc33aee27, 0x595c3e2a, 0xda8249b4, 0x29aee694, 0xc2fd08a9, 
	0x4fd288dc, 0xc2c17d52, 0x5987b08a, 0xd9e01006, 0x26b2a794, 0xc3bdbdf6, 0x4ec05432, 0xc2517e31, 
	0x59afaf4c, 0xd93f4e9e, 0x23a8fb93, 0xc4935b3c, 0x4da1fab5, 0xc1eb0209, 0x59d438e5, 0xd8a00bae, 
	0x2092f05f, 0xc57d965d, 0x4c77a88e, 0xc18e18a7, 0x59f54bee, 0xd8024d59, 0x1d719810, 0xc67c1e18, 
	0x4b418bbe, 0xc13ad060, 0x5a12e720, 0xd76619b6, 0x1a4608ab, 0xc78e9a1d, 0x49ffd417, 0xc0f1360b, 
	0x5a2d0957, 0xd6cb76c9, 0x17115bc0, 0xc8b4ab32, 0x48b2b335, 0xc0b15502, 0x5a43b190, 0xd6326a88, 
	0x13d4ae08, 0xc9edeb50, 0x475a5c77, 0xc07b371e, 0x5a56deec, 0xd59afadb, 0x10911f04, 0xcb39edca, 
	0x45f704f7, 0xc04ee4b8, 0x5a6690ae, 0xd5052d97, 0x0d47d096, 0xcc983f70, 0x4488e37f, 0xc02c64a6, 
	0x5a72c63b, 0xd4710883, 0x09f9e6a1, 0xce0866b8, 0x43103085, 0xc013bc39, 0x5a7b7f1a, 0xd3de9156, 
	0x06a886a0, 0xcf89e3e8, 0x418d2621, 0xc004ef3f, 0x5a80baf6, 0xd34dcdb4, 0x0354d741, 0xd11c3142, 
	0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 0x00000000, 0xd2bec333, 0x3e68fb62, 0xc004ef3f, 
	0x5a80baf6, 0xd2317756, 0xfcab28bf, 0xd4710883, 0x3cc85709, 0xc013bc39, 0x5a7b7f1a, 0xd1a5ef90, 
	0xf9577960, 0xd6326a88, 0x3b1e5335, 0xc02c64a6, 0x5a72c63b, 0xd11c3142, 0xf606195f, 0xd8024d59, 
	0x396b3199, 0xc04ee4b8, 0x5a6690ae, 0xd09441bb, 0xf2b82f6a, 0xd9e01006, 0x37af354c, 0xc07b371e, 
	0x5a56deec, 0xd00e2639, 0xef6ee0fc, 0xdbcb0cce, 0x35eaa2c7, 0xc0b15502, 0x5a43b190, 0xcf89e3e8, 
	0xec2b51f8, 0xddc29958, 0x341dbfd3, 0xc0f1360b, 0x5a2d0957, 0xcf077fe1, 0xe8eea440, 0xdfc606f1, 
	0x3248d382, 0xc13ad060, 0x5a12e720, 0xce86ff2a, 0xe5b9f755, 0xe1d4a2c8, 0x306c2624, 0xc18e18a7, 
	0x59f54bee, 0xce0866b8, 0xe28e67f0, 0xe3edb628, 0x2e88013a, 0xc1eb0209, 0x59d438e5, 0xcd8bbb6d, 
	0xdf6d0fa1, 0xe61086bc, 0x2c9caf6c, 0xc2517e31, 0x59afaf4c, 0xcd110216, 0xdc57046d, 0xe83c56cf, 
	0x2aaa7c7f, 0xc2c17d52, 0x5987b08a, 0xcc983f70, 0xd94d586c, 0xea70658a, 0x28b1b544, 0xc33aee27, 
	0x595c3e2a, 0xcc217822, 0xd651196c, 0xecabef3d, 0x26b2a794, 0xc3bdbdf6, 0x592d59da, 0xcbacb0bf, 
	0xd3635094, 0xeeee2d9d, 0x24ada23d, 0xc449d892, 0x58fb0568, 0xcb39edca, 0xd0850204, 0xf136580d, 
	0x22a2f4f8, 0xc4df2862, 0x58c542c5, 0xcac933ae, 0xcdb72c7e, 0xf383a3e2, 0x2092f05f, 0xc57d965d, 
	0x588c1404, 0xca5a86c4, 0xcafac90f, 0xf5d544a7, 0x1e7de5df, 0xc6250a18, 0x584f7b58, 0xc9edeb50, 
	0xc850cab4, 0xf82a6c6a, 0x1c6427a9, 0xc6d569be, 0x580f7b19, 0xc9836582, 0xc5ba1e09, 0xfa824bfd, 
	0x1a4608ab, 0xc78e9a1d, 0x57cc15bc, 0xc91af976, 0xc337a8f7, 0xfcdc1342, 0x1823dc7d, 0xc8507ea7, 
	0x57854ddd, 0xc8b4ab32, 0xc0ca4a63, 0xff36f170, 0x15fdf758, 0xc91af976, 0x573b2635, 0xc8507ea7, 
	0xbe72d9df, 0x0192155f, 0x13d4ae08, 0xc9edeb50, 0x56eda1a0, 0xc7ee77b3, 0xbc322766, 0x03ecadcf, 
	0x11a855df, 0xcac933ae, 0x569cc31b, 0xc78e9a1d, 0xba08fb09, 0x0645e9af, 0x0f7944a7, 0xcbacb0bf, 
	0x56488dc5, 0xc730e997, 0xb7f814b5, 0x089cf867, 0x0d47d096, 0xcc983f70, 0x55f104dc, 0xc6d569be, 
	0xb6002be9, 0x0af10a22, 0x0b145041, 0xcd8bbb6d, 0x55962bc0, 0xc67c1e18, 0xb421ef77, 0x0d415013, 
	0x08df1a8c, 0xce86ff2a, 0x553805f2, 0xc6250a18, 0xb25e054b, 0x0f8cfcbe, 0x06a886a0, 0xcf89e3e8, 
	0x54d69714, 0xc5d03118, 0xb0b50a2f, 0x11d3443f, 0x0470ebdc, 0xd09441bb, 0x5471e2e6, 0xc57d965d, 
	0xaf279193, 0x14135c94, 0x0238a1c6, 0xd1a5ef90, 0x5409ed4b, 0xc52d3d18, 0xadb6255e, 0x164c7ddd, 
	0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 0xac6145bb, 0x187de2a7, 0xfdc75e3a, 0xd3de9156, 
	0x53304df6, 0xc4935b3c, 0xab2968ec, 0x1aa6c82b, 0xfb8f1424, 0xd5052d97, 0x52beac9f, 0xc449d892, 
	0xaa0efb24, 0x1cc66e99, 0xf9577960, 0xd6326a88, 0x5249daa2, 0xc402a33c, 0xa9125e60, 0x1edc1953, 
	0xf720e574, 0xd76619b6, 0x51d1dc80, 0xc3bdbdf6, 0xa833ea44, 0x20e70f32, 0xf4ebafbf, 0xd8a00bae, 
	0x5156b6d9, 0xc37b2b6a, 0xa773ebfc, 0x22e69ac8, 0xf2b82f6a, 0xd9e01006, 0x50d86e6d, 0xc33aee27, 
	0xa6d2a626, 0x24da0a9a, 0xf086bb59, 0xdb25f566, 0x50570819, 0xc2fd08a9, 0xa65050b4, 0x26c0b162, 
	0xee57aa21, 0xdc71898d, 0x4fd288dc, 0xc2c17d52, 0xa5ed18e0, 0x2899e64a, 0xec2b51f8, 0xddc29958, 
	0x4f4af5d1, 0xc2884e6e, 0xa5a92114, 0x2a650525, 0xea0208a8, 0xdf18f0ce, 0x4ec05432, 0xc2517e31, 
	0xa58480e6, 0x2c216eaa, 0xe7dc2383, 0xe0745b24, 0x4e32a956, 0xc21d0eb8, 0xa57f450a, 0x2dce88aa, 
	0xe5b9f755, 0xe1d4a2c8, 0x4da1fab5, 0xc1eb0209, 0xa5996f52, 0x2f6bbe45, 0xe39bd857, 0xe3399167, 
	0x4d0e4de2, 0xc1bb5a11, 0xa5d2f6a9, 0x30f8801f, 0xe1821a21, 0xe4a2eff6, 0x4c77a88e, 0xc18e18a7, 
	0xa62bc71b, 0x32744493, 0xdf6d0fa1, 0xe61086bc, 0x4bde1089, 0xc1633f8a, 0xa6a3c1d6, 0x33de87de, 
	0xdd5d0b08, 0xe7821d59, 0x4b418bbe, 0xc13ad060, 0xa73abd3b, 0x3536cc52, 0xdb525dc3, 0xe8f77acf, 
	0x4aa22036, 0xc114ccb9, 0xa7f084e7, 0x367c9a7e, 0xd94d586c, 0xea70658a, 0x49ffd417, 0xc0f1360b, 
	0xa8c4d9cb, 0x37af8159, 0xd74e4abc, 0xebeca36c, 0x495aada2, 0xc0d00db6, 0xa9b7723b, 0x38cf1669, 
	0xd5558381, 0xed6bf9d1, 0x48b2b335, 0xc0b15502, 0xaac7fa0e, 0x39daf5e8, 0xd3635094, 0xeeee2d9d, 
	0x4807eb4b, 0xc0950d1d, 0xabf612b5, 0x3ad2c2e8, 0xd177fec6, 0xf0730342, 0x475a5c77, 0xc07b371e, 
	0xad415361, 0x3bb6276e, 0xcf93d9dc, 0xf1fa3ecb, 0x46aa0d6d, 0xc063d405, 0xaea94927, 0x3c84d496, 
	0xcdb72c7e, 0xf383a3e2, 0x45f704f7, 0xc04ee4b8, 0xb02d7724, 0x3d3e82ae, 0xcbe2402d, 0xf50ef5de, 
	0x454149fc, 0xc03c6a07, 0xb1cd56aa, 0x3de2f148, 0xca155d39, 0xf69bf7c9, 0x4488e37f, 0xc02c64a6, 
	0xb3885772, 0x3e71e759, 0xc850cab4, 0xf82a6c6a, 0x43cdd89a, 0xc01ed535, 0xb55ddfca, 0x3eeb3347, 
	0xc694ce67, 0xf9ba1651, 0x43103085, 0xc013bc39, 0xb74d4ccb, 0x3f4eaafe, 0xc4e1accb, 0xfb4ab7db, 
	0x424ff28f, 0xc00b1a20, 0xb955f293, 0x3f9c2bfb, 0xc337a8f7, 0xfcdc1342, 0x418d2621, 0xc004ef3f, 
	0xbb771c81, 0x3fd39b5a, 0xc197049e, 0xfe6deaa1, 0x40c7d2bd, 0xc0013bd3, 0xbdb00d71, 0x3ff4e5e0, 
};

const int twidTabEven[4*6 + 16*6 + 64*6] = {
	0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x5a82799a, 0xd2bec333, 
	0x539eba45, 0xe7821d59, 0x539eba45, 0xc4df2862, 0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 
	0x00000000, 0xd2bec333, 0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 0xac6145bb, 0x187de2a7, 
	
	0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x4b418bbe, 0xf383a3e2, 
	0x45f704f7, 0xf9ba1651, 0x4fd288dc, 0xed6bf9d1, 0x539eba45, 0xe7821d59, 0x4b418bbe, 0xf383a3e2, 
	0x58c542c5, 0xdc71898d, 0x58c542c5, 0xdc71898d, 0x4fd288dc, 0xed6bf9d1, 0x5a12e720, 0xce86ff2a, 
	0x5a82799a, 0xd2bec333, 0x539eba45, 0xe7821d59, 0x539eba45, 0xc4df2862, 0x58c542c5, 0xcac933ae, 
	0x569cc31b, 0xe1d4a2c8, 0x45f704f7, 0xc04ee4b8, 0x539eba45, 0xc4df2862, 0x58c542c5, 0xdc71898d, 
	0x3248d382, 0xc13ad060, 0x4b418bbe, 0xc13ad060, 0x5a12e720, 0xd76619b6, 0x1a4608ab, 0xc78e9a1d, 
	0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 0x00000000, 0xd2bec333, 0x3248d382, 0xc13ad060, 
	0x5a12e720, 0xce86ff2a, 0xe5b9f755, 0xe1d4a2c8, 0x22a2f4f8, 0xc4df2862, 0x58c542c5, 0xcac933ae, 
	0xcdb72c7e, 0xf383a3e2, 0x11a855df, 0xcac933ae, 0x569cc31b, 0xc78e9a1d, 0xba08fb09, 0x0645e9af, 
	0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 0xac6145bb, 0x187de2a7, 0xee57aa21, 0xdc71898d, 
	0x4fd288dc, 0xc2c17d52, 0xa5ed18e0, 0x2899e64a, 0xdd5d0b08, 0xe7821d59, 0x4b418bbe, 0xc13ad060, 
	0xa73abd3b, 0x3536cc52, 0xcdb72c7e, 0xf383a3e2, 0x45f704f7, 0xc04ee4b8, 0xb02d7724, 0x3d3e82ae, 
	
	0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x43103085, 0xfcdc1342, 
	0x418d2621, 0xfe6deaa1, 0x4488e37f, 0xfb4ab7db, 0x45f704f7, 0xf9ba1651, 0x43103085, 0xfcdc1342, 
	0x48b2b335, 0xf69bf7c9, 0x48b2b335, 0xf69bf7c9, 0x4488e37f, 0xfb4ab7db, 0x4c77a88e, 0xf1fa3ecb, 
	0x4b418bbe, 0xf383a3e2, 0x45f704f7, 0xf9ba1651, 0x4fd288dc, 0xed6bf9d1, 0x4da1fab5, 0xf0730342, 
	0x475a5c77, 0xf82a6c6a, 0x52beac9f, 0xe8f77acf, 0x4fd288dc, 0xed6bf9d1, 0x48b2b335, 0xf69bf7c9, 
	0x553805f2, 0xe4a2eff6, 0x51d1dc80, 0xea70658a, 0x49ffd417, 0xf50ef5de, 0x573b2635, 0xe0745b24, 
	0x539eba45, 0xe7821d59, 0x4b418bbe, 0xf383a3e2, 0x58c542c5, 0xdc71898d, 0x553805f2, 0xe4a2eff6, 
	0x4c77a88e, 0xf1fa3ecb, 0x59d438e5, 0xd8a00bae, 0x569cc31b, 0xe1d4a2c8, 0x4da1fab5, 0xf0730342, 
	0x5a6690ae, 0xd5052d97, 0x57cc15bc, 0xdf18f0ce, 0x4ec05432, 0xeeee2d9d, 0x5a7b7f1a, 0xd1a5ef90, 
	0x58c542c5, 0xdc71898d, 0x4fd288dc, 0xed6bf9d1, 0x5a12e720, 0xce86ff2a, 0x5987b08a, 0xd9e01006, 
	0x50d86e6d, 0xebeca36c, 0x592d59da, 0xcbacb0bf, 0x5a12e720, 0xd76619b6, 0x51d1dc80, 0xea70658a, 
	0x57cc15bc, 0xc91af976, 0x5a6690ae, 0xd5052d97, 0x52beac9f, 0xe8f77acf, 0x55f104dc, 0xc6d569be, 
	0x5a82799a, 0xd2bec333, 0x539eba45, 0xe7821d59, 0x539eba45, 0xc4df2862, 0x5a6690ae, 0xd09441bb, 
	0x5471e2e6, 0xe61086bc, 0x50d86e6d, 0xc33aee27, 0x5a12e720, 0xce86ff2a, 0x553805f2, 0xe4a2eff6, 
	0x4da1fab5, 0xc1eb0209, 0x5987b08a, 0xcc983f70, 0x55f104dc, 0xe3399167, 0x49ffd417, 0xc0f1360b, 
	0x58c542c5, 0xcac933ae, 0x569cc31b, 0xe1d4a2c8, 0x45f704f7, 0xc04ee4b8, 0x57cc15bc, 0xc91af976, 
	0x573b2635, 0xe0745b24, 0x418d2621, 0xc004ef3f, 0x569cc31b, 0xc78e9a1d, 0x57cc15bc, 0xdf18f0ce, 
	0x3cc85709, 0xc013bc39, 0x553805f2, 0xc6250a18, 0x584f7b58, 0xddc29958, 0x37af354c, 0xc07b371e, 
	0x539eba45, 0xc4df2862, 0x58c542c5, 0xdc71898d, 0x3248d382, 0xc13ad060, 0x51d1dc80, 0xc3bdbdf6, 
	0x592d59da, 0xdb25f566, 0x2c9caf6c, 0xc2517e31, 0x4fd288dc, 0xc2c17d52, 0x5987b08a, 0xd9e01006, 
	0x26b2a794, 0xc3bdbdf6, 0x4da1fab5, 0xc1eb0209, 0x59d438e5, 0xd8a00bae, 0x2092f05f, 0xc57d965d, 
	0x4b418bbe, 0xc13ad060, 0x5a12e720, 0xd76619b6, 0x1a4608ab, 0xc78e9a1d, 0x48b2b335, 0xc0b15502, 
	0x5a43b190, 0xd6326a88, 0x13d4ae08, 0xc9edeb50, 0x45f704f7, 0xc04ee4b8, 0x5a6690ae, 0xd5052d97, 
	0x0d47d096, 0xcc983f70, 0x43103085, 0xc013bc39, 0x5a7b7f1a, 0xd3de9156, 0x06a886a0, 0xcf89e3e8, 
	0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 0x00000000, 0xd2bec333, 0x3cc85709, 0xc013bc39, 
	0x5a7b7f1a, 0xd1a5ef90, 0xf9577960, 0xd6326a88, 0x396b3199, 0xc04ee4b8, 0x5a6690ae, 0xd09441bb, 
	0xf2b82f6a, 0xd9e01006, 0x35eaa2c7, 0xc0b15502, 0x5a43b190, 0xcf89e3e8, 0xec2b51f8, 0xddc29958, 
	0x3248d382, 0xc13ad060, 0x5a12e720, 0xce86ff2a, 0xe5b9f755, 0xe1d4a2c8, 0x2e88013a, 0xc1eb0209, 
	0x59d438e5, 0xcd8bbb6d, 0xdf6d0fa1, 0xe61086bc, 0x2aaa7c7f, 0xc2c17d52, 0x5987b08a, 0xcc983f70, 
	0xd94d586c, 0xea70658a, 0x26b2a794, 0xc3bdbdf6, 0x592d59da, 0xcbacb0bf, 0xd3635094, 0xeeee2d9d, 
	0x22a2f4f8, 0xc4df2862, 0x58c542c5, 0xcac933ae, 0xcdb72c7e, 0xf383a3e2, 0x1e7de5df, 0xc6250a18, 
	0x584f7b58, 0xc9edeb50, 0xc850cab4, 0xf82a6c6a, 0x1a4608ab, 0xc78e9a1d, 0x57cc15bc, 0xc91af976, 
	0xc337a8f7, 0xfcdc1342, 0x15fdf758, 0xc91af976, 0x573b2635, 0xc8507ea7, 0xbe72d9df, 0x0192155f, 
	0x11a855df, 0xcac933ae, 0x569cc31b, 0xc78e9a1d, 0xba08fb09, 0x0645e9af, 0x0d47d096, 0xcc983f70, 
	0x55f104dc, 0xc6d569be, 0xb6002be9, 0x0af10a22, 0x08df1a8c, 0xce86ff2a, 0x553805f2, 0xc6250a18, 
	0xb25e054b, 0x0f8cfcbe, 0x0470ebdc, 0xd09441bb, 0x5471e2e6, 0xc57d965d, 0xaf279193, 0x14135c94, 
	0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 0xac6145bb, 0x187de2a7, 0xfb8f1424, 0xd5052d97, 
	0x52beac9f, 0xc449d892, 0xaa0efb24, 0x1cc66e99, 0xf720e574, 0xd76619b6, 0x51d1dc80, 0xc3bdbdf6, 
	0xa833ea44, 0x20e70f32, 0xf2b82f6a, 0xd9e01006, 0x50d86e6d, 0xc33aee27, 0xa6d2a626, 0x24da0a9a, 
	0xee57aa21, 0xdc71898d, 0x4fd288dc, 0xc2c17d52, 0xa5ed18e0, 0x2899e64a, 0xea0208a8, 0xdf18f0ce, 
	0x4ec05432, 0xc2517e31, 0xa58480e6, 0x2c216eaa, 0xe5b9f755, 0xe1d4a2c8, 0x4da1fab5, 0xc1eb0209, 
	0xa5996f52, 0x2f6bbe45, 0xe1821a21, 0xe4a2eff6, 0x4c77a88e, 0xc18e18a7, 0xa62bc71b, 0x32744493, 
	0xdd5d0b08, 0xe7821d59, 0x4b418bbe, 0xc13ad060, 0xa73abd3b, 0x3536cc52, 0xd94d586c, 0xea70658a, 
	0x49ffd417, 0xc0f1360b, 0xa8c4d9cb, 0x37af8159, 0xd5558381, 0xed6bf9d1, 0x48b2b335, 0xc0b15502, 
	0xaac7fa0e, 0x39daf5e8, 0xd177fec6, 0xf0730342, 0x475a5c77, 0xc07b371e, 0xad415361, 0x3bb6276e, 
	0xcdb72c7e, 0xf383a3e2, 0x45f704f7, 0xc04ee4b8, 0xb02d7724, 0x3d3e82ae, 0xca155d39, 0xf69bf7c9, 
	0x4488e37f, 0xc02c64a6, 0xb3885772, 0x3e71e759, 0xc694ce67, 0xf9ba1651, 0x43103085, 0xc013bc39, 
	0xb74d4ccb, 0x3f4eaafe, 0xc337a8f7, 0xfcdc1342, 0x418d2621, 0xc004ef3f, 0xbb771c81, 0x3fd39b5a, 
};

/* for reference, here's the code to generate the bitreverse tables
   short blocks: nbits = 4 (nfft = 64)
   long blocks:  nbits = 7 (nfft = 512)

static int bitrev(int n, int nbits)
{
    int r, i;

	r = 0;
    for (i = 0; i < nbits; i++) {
        r <<= 1;
        r |= (n & 1);
        n >>= 1;
    }

    return r;
}

static void InitBitrevTable(unsigned char *out, int nbits)
{
    int i, t;

    for (i = 0; i < (1<<nbits); i++) {
		/ *** do not register the same transposition twice *** /
		t = bitrev(i,nbits);
		if (i < t) {
			*out++ = (unsigned char)i;
			*out++ = (unsigned char)t;
		}
	}

    / *** no need to write a sentinel (or rather, the first entry in the
	  * table for symetric codes will be 0, which serves as the sentinel)
	  *** /
    for (i = 0; i < (1<<nbits); i++) {
		t = bitrev(i,nbits);
		if (i == t)				/ *** symmetric codes get special treatment *** /
			*out++ = (unsigned char)t;
	}
    *out++ = 0;					/ *** second sentinel is 0, again *** /
}

*/

/* code to generate KBD window:
static double CalcI0(double x)
{
	int k;
	double i0, iTmp, iLast, x2, xPow, kFact;

	x2 = x / 2.0;
	i0 = 0.0;
	k = 0;
	kFact = 1;
	xPow = 1;
	do {
		iLast = i0;
		iTmp = xPow / kFact;
		i0 += (iTmp*iTmp);
		k++;
		kFact *= k;
		xPow *= x2;
	} while (fabs(i0 - iLast) > KBD_THRESH);

	return i0;
}

static double CalcW(double nRef, double n, double a)
{
	double i0Base, i0Curr, nTemp;

	i0Base = CalcI0(M_PI * a);

	nTemp = (n - nRef/4) / (nRef/4);
	i0Curr = CalcI0( M_PI * a * sqrt(1.0 - nTemp*nTemp) );

	return i0Curr / i0Base;
}

void InitKBDWindow(int nmdct)
{
	int n, nRef;
	double a, wBase, wCurr;

	nRef = nmdct * 2;

	/ *** kbd window *** /
	if (nmdct == 128)
		a = 6.0;
	else
		a = 4.0;

	wBase = 0;
	for (n = 0; n <= nRef/2; n++)
		wBase += CalcW(nRef, n, a);

	/ *** left *** /
	wCurr = 0;
	for (n = 0; n < nRef/2; n++) {
		wCurr += CalcW(nRef, n, a);
		kbdWindowRef[n] = sqrt(wCurr / wBase);
	}

    / ***
	 * symmetry:
	 *  kbd_right(n) = kbd_ldef(N_REF - 1 - n), n = [N_REF/2, N_REF - 1] 
	 *
	 * 	wCurr = 0;
	 * 	for (n = N_REF-1; n >= N_REF/2; n--) {
	 * 		wCurr += CalcW(N_REF-n-1, a);
	 * 		kbdWindowRef[n] = sqrt(wCurr / wBase);
	 * 	}
	 * 
	 *** /
	return;
}
*/
#pragma GCC diagnostic pop



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * June 2005
 *
 * trigtabs_fltgen.c - low-ROM alternative to trigtabs.c
 *                     generates large trig tables at runtime using floating-point
 *                     math library
 *                     MUST VERIFY that runtime-generated tables are bit-exact matches
 *                     with ROM tables in trigtabs.c
 **************************************************************************************/
#ifdef HELIX_CONFIG_AAC_GENERATE_TRIGTABS_FLOAT

#include <math.h>
//#include "coder.h"

/* read-only tables */
const int cos4sin4tabOffset[NUM_IMDCT_SIZES] = {0, 128};
const int sinWindowOffset[NUM_IMDCT_SIZES] = {0, 128};
const int kbdWindowOffset[NUM_IMDCT_SIZES] = {0, 128};
const int bitrevtabOffset[NUM_IMDCT_SIZES] = {0, 17};
const unsigned char bitrevtab[17 + 129] = {
/* nfft = 64 */
0x01, 0x08, 0x02, 0x04, 0x03, 0x0c, 0x05, 0x0a, 0x07, 0x0e, 0x0b, 0x0d, 0x00, 0x06, 0x09, 0x0f,
0x00,

/* nfft = 512 */
0x01, 0x40, 0x02, 0x20, 0x03, 0x60, 0x04, 0x10, 0x05, 0x50, 0x06, 0x30, 0x07, 0x70, 0x09, 0x48,
0x0a, 0x28, 0x0b, 0x68, 0x0c, 0x18, 0x0d, 0x58, 0x0e, 0x38, 0x0f, 0x78, 0x11, 0x44, 0x12, 0x24,
0x13, 0x64, 0x15, 0x54, 0x16, 0x34, 0x17, 0x74, 0x19, 0x4c, 0x1a, 0x2c, 0x1b, 0x6c, 0x1d, 0x5c,
0x1e, 0x3c, 0x1f, 0x7c, 0x21, 0x42, 0x23, 0x62, 0x25, 0x52, 0x26, 0x32, 0x27, 0x72, 0x29, 0x4a,
0x2b, 0x6a, 0x2d, 0x5a, 0x2e, 0x3a, 0x2f, 0x7a, 0x31, 0x46, 0x33, 0x66, 0x35, 0x56, 0x37, 0x76,
0x39, 0x4e, 0x3b, 0x6e, 0x3d, 0x5e, 0x3f, 0x7e, 0x43, 0x61, 0x45, 0x51, 0x47, 0x71, 0x4b, 0x69,
0x4d, 0x59, 0x4f, 0x79, 0x53, 0x65, 0x57, 0x75, 0x5b, 0x6d, 0x5f, 0x7d, 0x67, 0x73, 0x6f, 0x7b,
0x00, 0x08, 0x14, 0x1c, 0x22, 0x2a, 0x36, 0x3e, 0x41, 0x49, 0x55, 0x5d, 0x63, 0x6b, 0x77, 0x7f,
0x00,

};

/* tables generated at runtime */
int cos4sin4tab[128 + 1024];
int cos1sin1tab[514];
int sinWindow[128 + 1024];
int kbdWindow[128 + 1024];
int twidTabEven[4*6 + 16*6 + 64*6];
int twidTabOdd[8*6 + 32*6 + 128*6];

#define M_PI		3.14159265358979323846
#define M2_30		1073741824.0
#define M2_31		2147483648.0

#define MAX_DBL		 2147483647.0
#define MIN_DBL		-2147483648.0

static int NormAndRound(double x, double q, double n)
{
    if(x >= 0.0)
		x = (x*q*n + 0.5);
    else
        x = (x*q*n - 0.5);

	/* clip */
	if (x > MAX_DBL)
		x = MAX_DBL;
	if (x < MIN_DBL)
		x = MIN_DBL;

	return (int)x;
}

static void Init_cos4sin4tab(int *tPtr, int nmdct)
{
	int i;
	double angle1, angle2, invM, x1, x2, x3, x4;

    invM = -1.0 / (double)nmdct;
    for (i = 0; i < nmdct/4; i++) {
        angle1 = (i + 0.25) * M_PI / nmdct;
        angle2 = (nmdct/2 - 1 - i + 0.25) * M_PI / nmdct;

        x1 = invM * (cos(angle1) + sin(angle1));
        x2 = invM *  sin(angle1);
        x3 = invM * (cos(angle2) + sin(angle2));
        x4 = invM *  sin(angle2);
        
		tPtr[0] = NormAndRound(x1, M2_30, nmdct);
		tPtr[1] = NormAndRound(x2, M2_30, nmdct);
		tPtr[2] = NormAndRound(x3, M2_30, nmdct);
		tPtr[3] = NormAndRound(x4, M2_30, nmdct);
		tPtr += 4;
    }    
}

static void Init_cos1sin1tab(int *tPtr)
{
	int i;
	double angle, x1, x2;

    for (i = 0; i <= (512/2); i++) {    
        angle = i * M_PI / 1024;
        x1 = (cos(angle) + sin(angle));
        x2 =  sin(angle);

		tPtr[0] = NormAndRound(x1, M2_30, 1);
		tPtr[1] = NormAndRound(x2, M2_30, 1);
		tPtr += 2;
    }
}

static void Init_sinWindow(int *tPtr, int nmdct)
{
	int i;
	double angle1, angle2, x1, x2;

    for (i = 0; i < nmdct/2; i++) {
        angle1 = (i + 0.5) * M_PI / (2.0 * nmdct);
        angle2 = (nmdct - 1 - i + 0.5) * M_PI / (2.0 * nmdct);
        x1 = sin(angle1);
        x2 = sin(angle2);

		tPtr[0] = NormAndRound(x1, M2_31, 1);
		tPtr[1] = NormAndRound(x2, M2_31, 1);
		tPtr += 2;
    }
}


#define KBD_THRESH	1e-12

static double CalcI0(double x)
{
	int k;
	double i0, iTmp, iLast, x2, xPow, kFact;

	x2 = x / 2.0;
	i0 = 0.0;
	k = 0;
	kFact = 1;
	xPow = 1;
	do {
		iLast = i0;
		iTmp = xPow / kFact;
		i0 += (iTmp*iTmp);
		k++;
		kFact *= k;
		xPow *= x2;
	} while (fabs(i0 - iLast) > KBD_THRESH);

	return i0;
}

static double CalcW(double nRef, double n, double a)
{
	double i0Base, i0Curr, nTemp;

	i0Base = CalcI0(M_PI * a);

	nTemp = (n - nRef/4) / (nRef/4);
	i0Curr = CalcI0( M_PI * a * sqrt(1.0 - nTemp*nTemp) );

	return i0Curr / i0Base;
}

static void Init_kbdWindow(int *tPtr, int nmdct)
{
	int n, nRef;
	double a, wBase, wCurr, x1;

	nRef = nmdct * 2;

	/* kbd window */
	if (nmdct == 128)
		a = 6.0;
	else
		a = 4.0;

	wBase = 0;
	for (n = 0; n <= nRef/2; n++)
		wBase += CalcW(nRef, n, a);

	/* left */
	wCurr = 0;
	for (n = 0; n < nmdct/2; n++) {
		wCurr += CalcW(nRef, n, a);
		x1 = sqrt(wCurr / wBase);
		tPtr[0] = NormAndRound(x1, M2_31, 1);
		tPtr += 2;
	}
	tPtr--;

	/* right */
	for (n = nmdct/2; n < nmdct; n++) {
		wCurr += CalcW(nRef, n, a);
		x1 = sqrt(wCurr / wBase);
		tPtr[0] = NormAndRound(x1, M2_31, 1);
		tPtr -= 2;
	}

	/* symmetry:
	 *  kbd_right(n) = kbd_ldef(N_REF - 1 - n), n = [N_REF/2, N_REF - 1] 
	 *
	 * 	wCurr = 0;
	 * 	for (n = N_REF-1; n >= N_REF/2; n--) {
	 * 		wCurr += CalcW(N_REF-n-1, a);
	 * 		kbdWindowRef[n] = sqrt(wCurr / wBase);
	 * 	}
	 * 
	 */
	return;
}

static void Init_twidTabs(int *tPtrEven, int *tPtrOdd, int nfft)
{
	int j, k;
	double wr1, wi1, wr2, wi2, wr3, wi3;

    for (k = 4; k <= nfft/4; k <<= 1) {
        for (j = 0; j < k; j++) {
            wr1 = cos(1.0 * M_PI * j / (2*k));
            wi1 = sin(1.0 * M_PI * j / (2*k));
            wr1 = (wr1 + wi1);
            wi1 = -wi1;
 
            wr2 = cos(2.0 * M_PI * j / (2*k));
            wi2 = sin(2.0 * M_PI * j / (2*k));
            wr2 = (wr2 + wi2);
            wi2 = -wi2;
 
            wr3 = cos(3.0 * M_PI * j / (2*k));
            wi3 = sin(3.0 * M_PI * j / (2*k));
            wr3 = (wr3 + wi3);
            wi3 = -wi3;
 
            if (k & 0xaaaaaaaa) {
                tPtrOdd[0] = NormAndRound(wr2, M2_30, 1);
                tPtrOdd[1] = NormAndRound(wi2, M2_30, 1);
                tPtrOdd[2] = NormAndRound(wr1, M2_30, 1);
                tPtrOdd[3] = NormAndRound(wi1, M2_30, 1);
                tPtrOdd[4] = NormAndRound(wr3, M2_30, 1);
                tPtrOdd[5] = NormAndRound(wi3, M2_30, 1);
				tPtrOdd += 6;
            } else {
                tPtrEven[0] = NormAndRound(wr2, M2_30, 1);
                tPtrEven[1] = NormAndRound(wi2, M2_30, 1);
                tPtrEven[2] = NormAndRound(wr1, M2_30, 1);
                tPtrEven[3] = NormAndRound(wi1, M2_30, 1);
                tPtrEven[4] = NormAndRound(wr3, M2_30, 1);
                tPtrEven[5] = NormAndRound(wi3, M2_30, 1);
				tPtrEven += 6;
            }
        }
    }
}

/**************************************************************************************
 * Function:    AACInitTrigtabsFloat
 *
 * Description: generate AAC decoder tables using floating-point math library 
 *
 * Inputs:      none
 *
 * Outputs:     initialized tables
 *
 * Return:      0 on success
 *
 * Notes:       this function should ONLY be called when double-precision 
 *              floating-point math is supported
 *              the generated tables must be bit-exact matches with read-only
 *              tables stored in trigtabs.c
 *              this initializes global tables in RAM, and is NOT thread-safe,
 *              so the caller must ensure that this function is not called
 *              from multiple threads
 *              this should be called exactly once, before the entrypoint function
 *              for the application or DLL is called
 **************************************************************************************/
int AACInitTrigtabsFloat(void)
{
	/* cos4sin4tab */
	Init_cos4sin4tab(cos4sin4tab + cos4sin4tabOffset[0], 128);
	Init_cos4sin4tab(cos4sin4tab + cos4sin4tabOffset[1], 1024);

	/* cos1sin1tab */
	Init_cos1sin1tab(cos1sin1tab);

	/* sinWindow */
	Init_sinWindow(sinWindow + sinWindowOffset[0], 128);
	Init_sinWindow(sinWindow + sinWindowOffset[1], 1024);

	/* kbdWindow */
	Init_kbdWindow(kbdWindow + kbdWindowOffset[0], 128);
	Init_kbdWindow(kbdWindow + kbdWindowOffset[1], 1024);

	/* twidTabEven, twidTabOdd */
	Init_twidTabs(twidTabEven, twidTabOdd, 512);

	return 0;
}

/**************************************************************************************
 * Function:    AACFreeTrigtabsFloat
 *
 * Description: free any memory allocated by AACInitTrigtabsFloat()
 *
 * Inputs:      none
 *
 * Outputs:     none
 *
 * Return:      none
 **************************************************************************************/
void AACFreeTrigtabsFloat(void)
{	
	return;
}

#endif	/* HELIX_CONFIG_AAC_GENERATE_TRIGTABS_FLOAT */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * February 2005
 *
 * dct4.c - optimized DCT-IV
 **************************************************************************************/

//#include "coder.h"
////#include "assembly.h"

static const int nmdctTab[NUM_IMDCT_SIZES] = {128, 1024};
static const int postSkip[NUM_IMDCT_SIZES] = {15, 1};

/**************************************************************************************
 * Function:    PreMultiply
 *
 * Description: pre-twiddle stage of DCT4
 *
 * Inputs:      table index (for transform size)
 *              buffer of nmdct samples
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       minimum 1 GB in, 2 GB out, gains 5 (short) or 8 (long) frac bits
 *              i.e. gains 2-7= -5 int bits (short) or 2-10 = -8 int bits (long)
 *              normalization by -1/N is rolled into tables here (see trigtabs.c)
 *              uses 3-mul, 3-add butterflies instead of 4-mul, 2-add
 **************************************************************************************/
static void PreMultiply(int tabidx, int *zbuf1)
{
	int i, nmdct, ar1, ai1, ar2, ai2, z1, z2;
	int t, cms2, cps2a, sin2a, cps2b, sin2b;
	int *zbuf2;
	const int *csptr;

	nmdct = nmdctTab[tabidx];		
	zbuf2 = zbuf1 + nmdct - 1;
	csptr = cos4sin4tab + cos4sin4tabOffset[tabidx];

	/* whole thing should fit in registers - verify that compiler does this */
	for (i = nmdct >> 2; i != 0; i--) {
		/* cps2 = (cos+sin), sin2 = sin, cms2 = (cos-sin) */
		cps2a = *csptr++;
		sin2a = *csptr++;
		cps2b = *csptr++;
		sin2b = *csptr++;

		ar1 = *(zbuf1 + 0);
		ai2 = *(zbuf1 + 1);
		ai1 = *(zbuf2 + 0);
		ar2 = *(zbuf2 - 1);

		/* gain 2 ints bit from MULSHIFT32 by Q30, but drop 7 or 10 int bits from table scaling of 1/M
		 * max per-sample gain (ignoring implicit scaling) = MAX(sin(angle)+cos(angle)) = 1.414
		 * i.e. gain 1 GB since worst case is sin(angle) = cos(angle) = 0.707 (Q30), gain 2 from
		 *   extra sign bits, and eat one in adding
		 */
		t  = MULSHIFT32(sin2a, ar1 + ai1);
		z2 = MULSHIFT32(cps2a, ai1) - t;
		cms2 = cps2a - 2*sin2a;
		z1 = MULSHIFT32(cms2, ar1) + t;
		*zbuf1++ = z1;	/* cos*ar1 + sin*ai1 */
		*zbuf1++ = z2;	/* cos*ai1 - sin*ar1 */

		t  = MULSHIFT32(sin2b, ar2 + ai2);
		z2 = MULSHIFT32(cps2b, ai2) - t;
		cms2 = cps2b - 2*sin2b;
		z1 = MULSHIFT32(cms2, ar2) + t;
		*zbuf2-- = z2;	/* cos*ai2 - sin*ar2 */
		*zbuf2-- = z1;	/* cos*ar2 + sin*ai2 */
	}
}

/**************************************************************************************
 * Function:    PostMultiply
 *
 * Description: post-twiddle stage of DCT4
 *
 * Inputs:      table index (for transform size)
 *              buffer of nmdct samples
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       minimum 1 GB in, 2 GB out - gains 2 int bits
 *              uses 3-mul, 3-add butterflies instead of 4-mul, 2-add
 **************************************************************************************/
static void PostMultiply(int tabidx, int *fft1)
{
	int i, nmdct, ar1, ai1, ar2, ai2, skipFactor;
	int t, cms2, cps2, sin2;
	int *fft2;
	const int *csptr;

	nmdct = nmdctTab[tabidx];		
	csptr = cos1sin1tab;
	skipFactor = postSkip[tabidx];
	fft2 = fft1 + nmdct - 1;

	/* load coeffs for first pass
	 * cps2 = (cos+sin), sin2 = sin, cms2 = (cos-sin)
	 */
	cps2 = *csptr++;
	sin2 = *csptr;
	csptr += skipFactor;
	cms2 = cps2 - 2*sin2;

	for (i = nmdct >> 2; i != 0; i--) {
		ar1 = *(fft1 + 0);
		ai1 = *(fft1 + 1);
		ar2 = *(fft2 - 1);
		ai2 = *(fft2 + 0);

		/* gain 2 ints bit from MULSHIFT32 by Q30
		 * max per-sample gain = MAX(sin(angle)+cos(angle)) = 1.414
		 * i.e. gain 1 GB since worst case is sin(angle) = cos(angle) = 0.707 (Q30), gain 2 from
		 *   extra sign bits, and eat one in adding
		 */
		t = MULSHIFT32(sin2, ar1 + ai1);
		*fft2-- = t - MULSHIFT32(cps2, ai1);	/* sin*ar1 - cos*ai1 */
		*fft1++ = t + MULSHIFT32(cms2, ar1);	/* cos*ar1 + sin*ai1 */
		cps2 = *csptr++;
		sin2 = *csptr;
		csptr += skipFactor;

		ai2 = -ai2;
		t = MULSHIFT32(sin2, ar2 + ai2);
		*fft2-- = t - MULSHIFT32(cps2, ai2);	/* sin*ar1 - cos*ai1 */
		cms2 = cps2 - 2*sin2;
		*fft1++ = t + MULSHIFT32(cms2, ar2);	/* cos*ar1 + sin*ai1 */
	}
}

/**************************************************************************************
 * Function:    PreMultiplyRescale
 *
 * Description: pre-twiddle stage of DCT4, with rescaling for extra guard bits
 *
 * Inputs:      table index (for transform size)
 *              buffer of nmdct samples
 *              number of guard bits to add to input before processing
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       see notes on PreMultiply(), above
 **************************************************************************************/
 /* __attribute__ ((section (".data"))) */ static void PreMultiplyRescale(int tabidx, int *zbuf1, int es)
{
	int i, nmdct, ar1, ai1, ar2, ai2, z1, z2;
	int t, cms2, cps2a, sin2a, cps2b, sin2b;
	int *zbuf2;
	const int *csptr;

	nmdct = nmdctTab[tabidx];		
	zbuf2 = zbuf1 + nmdct - 1;
	csptr = cos4sin4tab + cos4sin4tabOffset[tabidx];

	/* whole thing should fit in registers - verify that compiler does this */
	for (i = nmdct >> 2; i != 0; i--) {
		/* cps2 = (cos+sin), sin2 = sin, cms2 = (cos-sin) */
		cps2a = *csptr++;	
		sin2a = *csptr++;
		cps2b = *csptr++;	
		sin2b = *csptr++;

		ar1 = *(zbuf1 + 0) >> es;
		ai1 = *(zbuf2 + 0) >> es;
		ai2 = *(zbuf1 + 1) >> es;

		t  = MULSHIFT32(sin2a, ar1 + ai1);
		z2 = MULSHIFT32(cps2a, ai1) - t;
		cms2 = cps2a - 2*sin2a;
		z1 = MULSHIFT32(cms2, ar1) + t;
		*zbuf1++ = z1;
		*zbuf1++ = z2;

		ar2 = *(zbuf2 - 1) >> es;	/* do here to free up register used for es */

		t  = MULSHIFT32(sin2b, ar2 + ai2);
		z2 = MULSHIFT32(cps2b, ai2) - t;
		cms2 = cps2b - 2*sin2b;
		z1 = MULSHIFT32(cms2, ar2) + t;
		*zbuf2-- = z2;
		*zbuf2-- = z1;

	}
}

/**************************************************************************************
 * Function:    PostMultiplyRescale
 *
 * Description: post-twiddle stage of DCT4, with rescaling for extra guard bits
 *
 * Inputs:      table index (for transform size)
 *              buffer of nmdct samples
 *              number of guard bits to remove from output
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       clips output to [-2^30, 2^30 - 1], guaranteeing at least 1 guard bit
 *              see notes on PostMultiply(), above
 **************************************************************************************/
 /* __attribute__ ((section (".data"))) */ static void PostMultiplyRescale(int tabidx, int *fft1, int es)
{
	int i, nmdct, ar1, ai1, ar2, ai2, skipFactor, z;
	int t, cs2, sin2;
	int *fft2;
	const int *csptr;

	nmdct = nmdctTab[tabidx];		
	csptr = cos1sin1tab;
	skipFactor = postSkip[tabidx];
	fft2 = fft1 + nmdct - 1;

	/* load coeffs for first pass
	 * cps2 = (cos+sin), sin2 = sin, cms2 = (cos-sin)
	 */
	cs2 = *csptr++;
	sin2 = *csptr;
	csptr += skipFactor;

	for (i = nmdct >> 2; i != 0; i--) {
		ar1 = *(fft1 + 0);
		ai1 = *(fft1 + 1);
		ai2 = *(fft2 + 0);

		t = MULSHIFT32(sin2, ar1 + ai1);
		z = t - MULSHIFT32(cs2, ai1);	
		CLIP_2N_SHIFT(z, es);	 
		*fft2-- = z;
		cs2 -= 2*sin2;
		z = t + MULSHIFT32(cs2, ar1);	
		CLIP_2N_SHIFT(z, es);	 
		*fft1++ = z;

		cs2 = *csptr++;
		sin2 = *csptr;
		csptr += skipFactor;

		ar2 = *fft2;
		ai2 = -ai2;
		t = MULSHIFT32(sin2, ar2 + ai2);
		z = t - MULSHIFT32(cs2, ai2);	
		CLIP_2N_SHIFT(z, es);	 
		*fft2-- = z;
		cs2 -= 2*sin2;
		z = t + MULSHIFT32(cs2, ar2);	
		CLIP_2N_SHIFT(z, es);	 
		*fft1++ = z;
		cs2 += 2*sin2;
	}
}

/**************************************************************************************
 * Function:    DCT4
 *
 * Description: type-IV DCT
 *
 * Inputs:      table index (for transform size)
 *              buffer of nmdct samples
 *              number of guard bits in the input buffer
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       operates in-place
 *              if number of guard bits in input is < GBITS_IN_DCT4, the input is 
 *                scaled (>>) before the DCT4 and rescaled (<<, with clipping) after
 *                the DCT4 (rare)
 *              the output has FBITS_LOST_DCT4 fewer fraction bits than the input
 *              the output will always have at least 1 guard bit (GBITS_IN_DCT4 >= 4)
 *              int bits gained per stage (PreMul + FFT + PostMul)
 *                 short blocks = (-5 + 4 + 2) = 1 total
 *                 long blocks =  (-8 + 7 + 2) = 1 total
 **************************************************************************************/
void DCT4(int tabidx, int *coef, int gb)
{
	int es;

	/* fast in-place DCT-IV - adds guard bits if necessary */
	if (gb < GBITS_IN_DCT4) {
		es = GBITS_IN_DCT4 - gb;
		PreMultiplyRescale(tabidx, coef, es);
		R4FFT(tabidx, coef);
		PostMultiplyRescale(tabidx, coef, es);
	} else {
		PreMultiply(tabidx, coef);
		R4FFT(tabidx, coef);
		PostMultiply(tabidx, coef);
	}
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * imdct.c - inverse MDCT
 **************************************************************************************/

//#include "coder.h"
////#include "assembly.h"

#define RND_VAL		(1 << (FBITS_OUT_IMDCT-1))

#ifndef AAC_ENABLE_SBR

/**************************************************************************************
 * Function:    DecWindowOverlap
 *
 * Description: apply synthesis window, do overlap-add, clip to 16-bit PCM,
 *                for winSequence LONG-LONG
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              number of channels
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 16-bit PCM, interleaved by nChans
 *
 * Return:      none
 *
 * Notes:       this processes one channel at a time, but skips every other sample in
 *                the output buffer (pcm) for stereo interleaving
 *              this should fit in registers on ARM
 *
 * TODO:        ARM5E version with saturating overlap/add (QADD)
 *              asm code with free pointer updates, better load scheduling
 **************************************************************************************/
/*__attribute__ ((section (".data")))*/ static void DecWindowOverlap(int *buf0, int *over0, short *pcm0, int nChans, int winTypeCurr, int winTypePrev)
{
	int in, w0, w1, f0, f1;
	int *buf1, *over1;
	short *pcm1;
	const int *wndPrev, *wndCurr;

	buf0 += (1024 >> 1);
	buf1  = buf0  - 1;
	pcm1  = pcm0 + (1024 - 1) * nChans;
	over1 = over0 + 1024 - 1;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);
	if (winTypeCurr == winTypePrev) {
		/* cut window loads in half since current and overlap sections use same symmetric window */
		do {
			w0 = *wndPrev++;
			w1 = *wndPrev++;
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			in = *over0;	
			*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
			pcm0 += nChans;

			in = *over1;	
			*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
			pcm1 -= nChans;

			in = *buf1--;
			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	} else {
		/* different windows for current and overlap parts - should still fit in registers on ARM w/o stack spill */
		wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);
		do {
			w0 = *wndPrev++;
			w1 = *wndPrev++;
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			in = *over0;	
			*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
			pcm0 += nChans;

			in = *over1;	
			*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
			pcm1 -= nChans;

			w0 = *wndCurr++;
			w1 = *wndCurr++;
			in = *buf1--;

			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	}
}

/**************************************************************************************
 * Function:    DecWindowOverlapLongStart
 *
 * Description: apply synthesis window, do overlap-add, clip to 16-bit PCM,
 *                for winSequence LONG-START
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              number of channels
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 16-bit PCM, interleaved by nChans
 *
 * Return:      none
 *
 * Notes:       this processes one channel at a time, but skips every other sample in
 *                the output buffer (pcm) for stereo interleaving
 *              this should fit in registers on ARM
 *
 * TODO:        ARM5E version with saturating overlap/add (QADD)
 *              asm code with free pointer updates, better load scheduling
 **************************************************************************************/
 /*__attribute__ ((section (".data")))*/ static void DecWindowOverlapLongStart(int *buf0, int *over0, short *pcm0, int nChans, int winTypeCurr, int winTypePrev)
{
	int i,  in, w0, w1, f0, f1;
	int *buf1, *over1;
	short *pcm1;
	const int *wndPrev, *wndCurr;

	buf0 += (1024 >> 1);
	buf1  = buf0  - 1;
	pcm1  = pcm0 + (1024 - 1) * nChans;
	over1 = over0 + 1024 - 1;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);
	i = 448;	/* 2 outputs, 2 overlaps per loop */
	do {
		w0 = *wndPrev++;
		w1 = *wndPrev++;
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm0 += nChans;

		in = *over1;	
		*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm1 -= nChans;

		in = *buf1--;

		*over1-- = 0;		/* Wn = 0 for n = (2047, 2046, ... 1600) */
		*over0++ = in >> 1;	/* Wn = 1 for n = (1024, 1025, ... 1471) */
	} while (--i);

	wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);

	/* do 64 more loops - 2 outputs, 2 overlaps per loop */
	do {
		w0 = *wndPrev++;
		w1 = *wndPrev++;
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm0 += nChans;

		in = *over1;	
		*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm1 -= nChans;

		w0 = *wndCurr++;	/* W[0], W[1], ... --> W[255], W[254], ... */
		w1 = *wndCurr++;	/* W[127], W[126], ... --> W[128], W[129], ... */
		in = *buf1--;

		*over1-- = MULSHIFT32(w0, in);	/* Wn = short window for n = (1599, 1598, ... , 1536) */
		*over0++ = MULSHIFT32(w1, in);	/* Wn = short window for n = (1472, 1473, ... , 1535) */
	} while (over0 < over1);
}

/**************************************************************************************
 * Function:    DecWindowOverlapLongStop
 *
 * Description: apply synthesis window, do overlap-add, clip to 16-bit PCM,
 *                for winSequence LONG-STOP
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              number of channels
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 16-bit PCM, interleaved by nChans
 *
 * Return:      none
 *
 * Notes:       this processes one channel at a time, but skips every other sample in
 *                the output buffer (pcm) for stereo interleaving
 *              this should fit in registers on ARM
 *
 * TODO:        ARM5E version with saturating overlap/add (QADD)
 *              asm code with free pointer updates, better load scheduling
 **************************************************************************************/
 /*__attribute__ ((section (".data")))*/ static void DecWindowOverlapLongStop(int *buf0, int *over0, short *pcm0, int nChans, int winTypeCurr, int winTypePrev)
{
	int i, in, w0, w1, f0, f1;
	int *buf1, *over1;
	short *pcm1;
	const int *wndPrev, *wndCurr;

	buf0 += (1024 >> 1);
	buf1  = buf0  - 1;
	pcm1  = pcm0 + (1024 - 1) * nChans;
	over1 = over0 + 1024 - 1;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);
	wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);

	i = 448;	/* 2 outputs, 2 overlaps per loop */
	do {
		/* Wn = 0 for n = (0, 1, ... 447) */
		/* Wn = 1 for n = (576, 577, ... 1023) */
		in = *buf0++;
		f1 = in >> 1;	/* scale since skipping multiply by Q31 */

		in = *over0;	
		*pcm0 = CLIPTOSHORT( (in + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm0 += nChans;

		in = *over1;	
		*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm1 -= nChans;

		w0 = *wndCurr++;
		w1 = *wndCurr++;
		in = *buf1--;

		*over1-- = MULSHIFT32(w0, in);
		*over0++ = MULSHIFT32(w1, in);
	} while (--i);

	/* do 64 more loops - 2 outputs, 2 overlaps per loop */
	do {
		w0 = *wndPrev++;	/* W[0], W[1], ...W[63] */
		w1 = *wndPrev++;	/* W[127], W[126], ... W[64] */
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm0 += nChans;

		in = *over1;	
		*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm1 -= nChans;

		w0 = *wndCurr++;
		w1 = *wndCurr++;	
		in = *buf1--;

		*over1-- = MULSHIFT32(w0, in);
		*over0++ = MULSHIFT32(w1, in);
	} while (over0 < over1);
}

/**************************************************************************************
 * Function:    DecWindowOverlapShort
 *
 * Description: apply synthesis window, do overlap-add, clip to 16-bit PCM,
 *                for winSequence EIGHT-SHORT (does all 8 short blocks)
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              number of channels
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 16-bit PCM, interleaved by nChans
 *
 * Return:      none
 *
 * Notes:       this processes one channel at a time, but skips every other sample in
 *                the output buffer (pcm) for stereo interleaving
 *              this should fit in registers on ARM
 *
 * TODO:        ARM5E version with saturating overlap/add (QADD)
 *              asm code with free pointer updates, better load scheduling
 **************************************************************************************/
 /*__attribute__ ((section (".data"))) */ static void DecWindowOverlapShort(int *buf0, int *over0, short *pcm0, int nChans, int winTypeCurr, int winTypePrev)
{
	int i, in, w0, w1, f0, f1;
	int *buf1, *over1;
	short *pcm1;
	const int *wndPrev, *wndCurr;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);
	wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);

	/* pcm[0-447] = 0 + overlap[0-447] */
	i = 448;
	do {
		f0 = *over0++;
		f1 = *over0++;
		*pcm0 = CLIPTOSHORT( (f0 + RND_VAL) >> FBITS_OUT_IMDCT );	pcm0 += nChans;
		*pcm0 = CLIPTOSHORT( (f1 + RND_VAL) >> FBITS_OUT_IMDCT );	pcm0 += nChans;
		i -= 2;
	} while (i);

	/* pcm[448-575] = Wp[0-127] * block0[0-127] + overlap[448-575] */
	pcm1  = pcm0 + (128 - 1) * nChans;
	over1 = over0 + 128 - 1;
	buf0 += 64;
	buf1  = buf0  - 1;
	do {
		w0 = *wndPrev++;	/* W[0], W[1], ...W[63] */
		w1 = *wndPrev++;	/* W[127], W[126], ... W[64] */
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm0 += nChans;

		in = *over1;	
		*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm1 -= nChans;

		w0 = *wndCurr++;
		w1 = *wndCurr++;
		in = *buf1--;

		/* save over0/over1 for next short block, in the slots just vacated */
		*over1-- = MULSHIFT32(w0, in);
		*over0++ = MULSHIFT32(w1, in);
	} while (over0 < over1);

	/* pcm[576-703] = Wc[128-255] * block0[128-255] + Wc[0-127] * block1[0-127] + overlap[576-703] 
	 * pcm[704-831] = Wc[128-255] * block1[128-255] + Wc[0-127] * block2[0-127] + overlap[704-831] 
	 * pcm[832-959] = Wc[128-255] * block2[128-255] + Wc[0-127] * block3[0-127] + overlap[832-959] 
	 */
	for (i = 0; i < 3; i++) {
		pcm0 += 64 * nChans;
		pcm1 = pcm0 + (128 - 1) * nChans;
		over0 += 64;
		over1 = over0 + 128 - 1;
		buf0 += 64;
		buf1 = buf0 - 1;
		wndCurr -= 128;

		do {
			w0 = *wndCurr++;	/* W[0], W[1], ...W[63] */
			w1 = *wndCurr++;	/* W[127], W[126], ... W[64] */
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			in  = *(over0 - 128);	/* from last short block */
			in += *(over0 + 0);		/* from last full frame */
			*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
			pcm0 += nChans;

			in  = *(over1 - 128);	/* from last short block */
			in += *(over1 + 0);		/* from last full frame */
			*pcm1 = CLIPTOSHORT( (in + f1 + RND_VAL) >> FBITS_OUT_IMDCT );
			pcm1 -= nChans;

			/* save over0/over1 for next short block, in the slots just vacated */
			in = *buf1--;
			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	}

	/* pcm[960-1023] = Wc[128-191] * block3[128-191] + Wc[0-63]   * block4[0-63] + overlap[960-1023]  
	 * over[0-63]    = Wc[192-255] * block3[192-255] + Wc[64-127] * block4[64-127]
	 */
	pcm0 += 64 * nChans;
	over0 -= 832;				/* points at overlap[64] */
	over1 = over0 + 128 - 1;	/* points at overlap[191] */
	buf0 += 64;
	buf1 = buf0 - 1;
	wndCurr -= 128;
	do {
		w0 = *wndCurr++;	/* W[0], W[1], ...W[63] */
		w1 = *wndCurr++;	/* W[127], W[126], ... W[64] */
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in  = *(over0 + 768);	/* from last short block */
		in += *(over0 + 896);	/* from last full frame */
		*pcm0 = CLIPTOSHORT( (in - f0 + RND_VAL) >> FBITS_OUT_IMDCT );
		pcm0 += nChans;

		in  = *(over1 + 768);	/* from last short block */
		*(over1 - 128) = in + f1;

		in = *buf1--;
		*over1-- = MULSHIFT32(w0, in);	/* save in overlap[128-191] */
		*over0++ = MULSHIFT32(w1, in);	/* save in overlap[64-127] */
	} while (over0 < over1);
	
	/* over0 now points at overlap[128] */
	
	/* over[64-191]   = Wc[128-255] * block4[128-255] + Wc[0-127] * block5[0-127] 
	 * over[192-319]  = Wc[128-255] * block5[128-255] + Wc[0-127] * block6[0-127]
	 * over[320-447]  = Wc[128-255] * block6[128-255] + Wc[0-127] * block7[0-127]  
	 * over[448-576]  = Wc[128-255] * block7[128-255]
	 */
	for (i = 0; i < 3; i++) {
		over0 += 64;
		over1 = over0 + 128 - 1;
		buf0 += 64;
		buf1 = buf0 - 1;
		wndCurr -= 128;
		do {
			w0 = *wndCurr++;	/* W[0], W[1], ...W[63] */
			w1 = *wndCurr++;	/* W[127], W[126], ... W[64] */
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			/* from last short block */
			*(over0 - 128) -= f0;
			*(over1 - 128)+= f1;

			in = *buf1--;
			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	}

	/* over[576-1024] = 0 */ 
	i = 448;
	over0 += 64;
	do {
		*over0++ = 0;
		*over0++ = 0;
		*over0++ = 0;
		*over0++ = 0;
		i -= 4;
	} while (i);
}

#endif	/* !AAC_ENABLE_SBR */

/**************************************************************************************
 * Function:    IMDCT
 *
 * Description: inverse transform and convert to 16-bit PCM
 *
 * Inputs:      valid AACDecInfo struct
 *              index of current channel (0 for SCE/LFE, 0 or 1 for CPE)
 *              output channel (range = [0, nChans-1])
 *
 * Outputs:     complete frame of decoded PCM, after inverse transform
 *
 * Return:      0 if successful, -1 if error
 *
 * Notes:       If AAC_ENABLE_SBR is defined at compile time then window + overlap 
 *                does NOT clip to 16-bit PCM and does NOT interleave channels
 *              If AAC_ENABLE_SBR is NOT defined at compile time, then window + overlap 
 *                does clip to 16-bit PCM and interleaves channels
 *              If SBR is enabled at compile time, but we don't know whether it is
 *                actually used for this frame (e.g. the first frame of a stream),
 *                we need to produce both clipped 16-bit PCM in outbuf AND
 *                unclipped 32-bit PCM in the SBR input buffer. In this case we make
 *                a separate pass over the 32-bit PCM to produce 16-bit PCM output.
 *                This inflicts a slight performance hit when decoding non-SBR files.
 **************************************************************************************/
int IMDCT(AACDecInfo *aacDecInfo, int ch, int chOut, short *outbuf)
{
	int i;
	PSInfoBase *psi;
	ICSInfo *icsInfo;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);
	outbuf += chOut;

	/* optimized type-IV DCT (operates inplace) */
	if (icsInfo->winSequence == 2) {
		/* 8 short blocks */
		for (i = 0; i < 8; i++)
			DCT4(0, psi->coef[ch] + i*128, psi->gbCurrent[ch]);
	} else {
		/* 1 long block */
		DCT4(1, psi->coef[ch], psi->gbCurrent[ch]);
	}

#ifdef AAC_ENABLE_SBR
	/* window, overlap-add, don't clip to short (send to SBR decoder) 
	 * store the decoded 32-bit samples in top half (second AAC_MAX_NSAMPS samples) of coef buffer
	 */
	if (icsInfo->winSequence == 0)
		DecWindowOverlapNoClip(psi->coef[ch], psi->overlap[chOut], psi->sbrWorkBuf[ch], icsInfo->winShape, psi->prevWinShape[chOut]);
	else if (icsInfo->winSequence == 1)
		DecWindowOverlapLongStartNoClip(psi->coef[ch], psi->overlap[chOut], psi->sbrWorkBuf[ch], icsInfo->winShape, psi->prevWinShape[chOut]);
	else if (icsInfo->winSequence == 2)
		DecWindowOverlapShortNoClip(psi->coef[ch], psi->overlap[chOut], psi->sbrWorkBuf[ch], icsInfo->winShape, psi->prevWinShape[chOut]);
	else if (icsInfo->winSequence == 3)
		DecWindowOverlapLongStopNoClip(psi->coef[ch], psi->overlap[chOut], psi->sbrWorkBuf[ch], icsInfo->winShape, psi->prevWinShape[chOut]);

	if (!aacDecInfo->sbrEnabled) {
		for (i = 0; i < AAC_MAX_NSAMPS; i++) {
			*outbuf = CLIPTOSHORT((psi->sbrWorkBuf[ch][i] + RND_VAL) >> FBITS_OUT_IMDCT);
			outbuf += aacDecInfo->nChans;
		}
	}

	aacDecInfo->rawSampleBuf[ch] = psi->sbrWorkBuf[ch];
	aacDecInfo->rawSampleBytes = sizeof(int);
	aacDecInfo->rawSampleFBits = FBITS_OUT_IMDCT;
#else
	/* window, overlap-add, round to PCM - optimized for each window sequence */
	if (icsInfo->winSequence == 0)
		DecWindowOverlap(psi->coef[ch], psi->overlap[chOut], outbuf, aacDecInfo->nChans, icsInfo->winShape, psi->prevWinShape[chOut]);
	else if (icsInfo->winSequence == 1)
		DecWindowOverlapLongStart(psi->coef[ch], psi->overlap[chOut], outbuf, aacDecInfo->nChans, icsInfo->winShape, psi->prevWinShape[chOut]);
	else if (icsInfo->winSequence == 2)
		DecWindowOverlapShort(psi->coef[ch], psi->overlap[chOut], outbuf, aacDecInfo->nChans, icsInfo->winShape, psi->prevWinShape[chOut]);
	else if (icsInfo->winSequence == 3)
		DecWindowOverlapLongStop(psi->coef[ch], psi->overlap[chOut], outbuf, aacDecInfo->nChans, icsInfo->winShape, psi->prevWinShape[chOut]);

	aacDecInfo->rawSampleBuf[ch] = 0;
	aacDecInfo->rawSampleBytes = 0;
	aacDecInfo->rawSampleFBits = 0;
#endif

	psi->prevWinShape[chOut] = icsInfo->winShape;

	return 0;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * February 2005
 *
 * fft.c - Ken's optimized radix-4 DIT FFT, optional radix-8 first pass for odd log2(N)
 **************************************************************************************/

//#include "coder.h"
////#include "assembly.h"

#define NUM_FFT_SIZES	2
static const int nfftTab[NUM_FFT_SIZES] =		{64, 512};
static const int nfftlog2Tab[NUM_FFT_SIZES] =	{6, 9};

#define SQRT1_2 0x5a82799a	/* sqrt(1/2) in Q31 */

#define swapcplx(p0,p1) \
	t = p0; t1 = *(&(p0)+1); p0 = p1; *(&(p0)+1) = *(&(p1)+1); p1 = t; *(&(p1)+1) = t1

/**************************************************************************************
 * Function:    BitReverse
 *
 * Description: Ken's fast in-place bit reverse, using super-small table
 *
 * Inputs:      buffer of samples
 *              table index (for transform size)
 *
 * Outputs:     bit-reversed samples in same buffer
 *
 * Return:      none
 **************************************************************************************/
 /*__attribute__ ((section (".data"))) */ static void BitReverse(int *inout, int tabidx)
{
    int *part0, *part1;
	int a,b, t,t1;
	const unsigned char* tab = bitrevtab + bitrevtabOffset[tabidx];
	int nbits = nfftlog2Tab[tabidx];

	part0 = inout;
    part1 = inout + (1 << nbits);
	
	while ((a = *tab++) != 0) {
        b = *tab++;

        swapcplx(part0[4*a+0], part0[4*b+0]);	/* 0xxx0 <-> 0yyy0 */
        swapcplx(part0[4*a+2], part1[4*b+0]);	/* 0xxx1 <-> 1yyy0 */
        swapcplx(part1[4*a+0], part0[4*b+2]);	/* 1xxx0 <-> 0yyy1 */
        swapcplx(part1[4*a+2], part1[4*b+2]);	/* 1xxx1 <-> 1yyy1 */
    }

    do {
        swapcplx(part0[4*a+2], part1[4*a+0]);	/* 0xxx1 <-> 1xxx0 */
    } while ((a = *tab++) != 0);
	
	
}

/**************************************************************************************
 * Function:    R4FirstPass
 *
 * Description: radix-4 trivial pass for decimation-in-time FFT
 *
 * Inputs:      buffer of (bit-reversed) samples
 *              number of R4 butterflies per group (i.e. nfft / 4)
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       assumes 2 guard bits, gains no integer bits, 
 *                guard bits out = guard bits in - 2
 **************************************************************************************/
 /* __attribute__ ((section (".data"))) */ static void R4FirstPass(int *x, int bg)
{
    int ar, ai, br, bi, cr, ci, dr, di;
	
	for (; bg != 0; bg--) {

		ar = x[0] + x[2];
		br = x[0] - x[2];
		ai = x[1] + x[3];
		bi = x[1] - x[3];
		cr = x[4] + x[6];
		dr = x[4] - x[6];
		ci = x[5] + x[7];
		di = x[5] - x[7];

		/* max per-sample gain = 4.0 (adding 4 inputs together) */
		x[0] = ar + cr;
		x[4] = ar - cr;
		x[1] = ai + ci;
		x[5] = ai - ci;
		x[2] = br + di;
		x[6] = br - di;
		x[3] = bi - dr;
		x[7] = bi + dr;

		x += 8;
	}
}

/**************************************************************************************
 * Function:    R8FirstPass
 *
 * Description: radix-8 trivial pass for decimation-in-time FFT
 *
 * Inputs:      buffer of (bit-reversed) samples
 *              number of R8 butterflies per group (i.e. nfft / 8)
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       assumes 3 guard bits, gains 1 integer bit
 *              guard bits out = guard bits in - 3 (if inputs are full scale)
 *                or guard bits in - 2 (if inputs bounded to +/- sqrt(2)/2)
 *              see scaling comments in code
 **************************************************************************************/
 /* __attribute__ ((section (".data"))) */ static void R8FirstPass(int *x, int bg)
{
    int ar, ai, br, bi, cr, ci, dr, di;
	int sr, si, tr, ti, ur, ui, vr, vi;
	int wr, wi, xr, xi, yr, yi, zr, zi;

	for (; bg != 0; bg--) {

		ar = x[0] + x[2];
		br = x[0] - x[2];
		ai = x[1] + x[3];
		bi = x[1] - x[3];
		cr = x[4] + x[6];
		dr = x[4] - x[6];
		ci = x[5] + x[7];
		di = x[5] - x[7];

		sr = ar + cr;
		ur = ar - cr;
		si = ai + ci;
		ui = ai - ci;
		tr = br - di;
		vr = br + di;
		ti = bi + dr;
		vi = bi - dr;

		ar = x[ 8] + x[10];
		br = x[ 8] - x[10];
		ai = x[ 9] + x[11];
		bi = x[ 9] - x[11];
		cr = x[12] + x[14];
		dr = x[12] - x[14];
		ci = x[13] + x[15];
		di = x[13] - x[15];

		/* max gain of wr/wi/yr/yi vs input = 2
		 *  (sum of 4 samples >> 1) 
		 */
		wr = (ar + cr) >> 1;
		yr = (ar - cr) >> 1;
		wi = (ai + ci) >> 1;
		yi = (ai - ci) >> 1;

		/* max gain of output vs input = 4
		 *  (sum of 4 samples >> 1 + sum of 4 samples >> 1) 
		 */
		x[ 0] = (sr >> 1) + wr;
		x[ 8] = (sr >> 1) - wr;
		x[ 1] = (si >> 1) + wi;
		x[ 9] = (si >> 1) - wi;
		x[ 4] = (ur >> 1) + yi;
		x[12] = (ur >> 1) - yi;
		x[ 5] = (ui >> 1) - yr;
		x[13] = (ui >> 1) + yr;

		ar = br - di;
		cr = br + di;
		ai = bi + dr;
		ci = bi - dr;

		/* max gain of xr/xi/zr/zi vs input = 4*sqrt(2)/2 = 2*sqrt(2)
		 *  (sum of 8 samples, multiply by sqrt(2)/2, implicit >> 1 from Q31) 
		 */
		xr = MULSHIFT32(SQRT1_2, ar - ai);
		xi = MULSHIFT32(SQRT1_2, ar + ai);
		zr = MULSHIFT32(SQRT1_2, cr - ci);
		zi = MULSHIFT32(SQRT1_2, cr + ci);

		/* max gain of output vs input = (2 + 2*sqrt(2) ~= 4.83)
		 *  (sum of 4 samples >> 1, plus xr/xi/zr/zi with gain of 2*sqrt(2))
		 * in absolute terms, we have max gain of appx 9.656 (4 + 0.707*8)
		 *  but we also gain 1 int bit (from MULSHIFT32 or from explicit >> 1)
		 */
		x[ 6] = (tr >> 1) - xr;
		x[14] = (tr >> 1) + xr;
		x[ 7] = (ti >> 1) - xi;
		x[15] = (ti >> 1) + xi;
		x[ 2] = (vr >> 1) + zi;
		x[10] = (vr >> 1) - zi;
		x[ 3] = (vi >> 1) - zr;
		x[11] = (vi >> 1) + zr;

		x += 16;
	}
}

/**************************************************************************************
 * Function:    R4Core
 *
 * Description: radix-4 pass for decimation-in-time FFT
 *
 * Inputs:      buffer of samples
 *              number of R4 butterflies per group
 *              number of R4 groups per pass
 *              pointer to twiddle factors tables
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       gain 2 integer bits per pass (see scaling comments in code)
 *              min 1 GB in
 *              gbOut = gbIn - 1 (short block) or gbIn - 2 (long block)
 *              uses 3-mul, 3-add butterflies instead of 4-mul, 2-add
 **************************************************************************************/
 /* __attribute__ ((section (".data"))) */ static void R4Core(int *x, int bg, int gp, int *wtab)
{
	int ar, ai, br, bi, cr, ci, dr, di, tr, ti;
	int wd, ws, wi;
	int i, j, step;
	int *xptr, *wptr;

	for (; bg != 0; gp <<= 2, bg >>= 2) {

		step = 2*gp;
		xptr = x;

		/* max per-sample gain, per group < 1 + 3*sqrt(2) ~= 5.25 if inputs x are full-scale
		 * do 3 groups for long block, 2 groups for short block (gain 2 int bits per group)
		 *
		 * very conservative scaling:
		 *   group 1: max gain = 5.25,           int bits gained = 2, gb used = 1 (2^3 = 8)
		 *   group 2: max gain = 5.25^2 = 27.6,  int bits gained = 4, gb used = 1 (2^5 = 32)
		 *   group 3: max gain = 5.25^3 = 144.7, int bits gained = 6, gb used = 2 (2^8 = 256)
		 */
		for (i = bg; i != 0; i--) {

			wptr = wtab;

			for (j = gp; j != 0; j--) {

				ar = xptr[0];
				ai = xptr[1];
				xptr += step;
				
				/* gain 2 int bits for br/bi, cr/ci, dr/di (MULSHIFT32 by Q30)
				 * gain 1 net GB
				 */
				ws = wptr[0];
				wi = wptr[1];
				br = xptr[0];
				bi = xptr[1];
				wd = ws + 2*wi;
				tr = MULSHIFT32(wi, br + bi);
				br = MULSHIFT32(wd, br) - tr;	/* cos*br + sin*bi */
				bi = MULSHIFT32(ws, bi) + tr;	/* cos*bi - sin*br */
				xptr += step;
				
				ws = wptr[2];
				wi = wptr[3];
				cr = xptr[0];
				ci = xptr[1];
				wd = ws + 2*wi;
				tr = MULSHIFT32(wi, cr + ci);
				cr = MULSHIFT32(wd, cr) - tr;
				ci = MULSHIFT32(ws, ci) + tr;
				xptr += step;
				
				ws = wptr[4];
				wi = wptr[5];
				dr = xptr[0];
				di = xptr[1];
				wd = ws + 2*wi;
				tr = MULSHIFT32(wi, dr + di);
				dr = MULSHIFT32(wd, dr) - tr;
				di = MULSHIFT32(ws, di) + tr;
				wptr += 6;

				tr = ar;
				ti = ai;
				ar = (tr >> 2) - br;
				ai = (ti >> 2) - bi;
				br = (tr >> 2) + br;
				bi = (ti >> 2) + bi;

				tr = cr;
				ti = ci;
				cr = tr + dr;
				ci = di - ti;
				dr = tr - dr;
				di = di + ti;

				xptr[0] = ar + ci;
				xptr[1] = ai + dr;
				xptr -= step;
				xptr[0] = br - cr;
				xptr[1] = bi - di;
				xptr -= step;
				xptr[0] = ar - ci;
				xptr[1] = ai - dr;
				xptr -= step;
				xptr[0] = br + cr;
				xptr[1] = bi + di;
				xptr += 2;
			}
			xptr += 3*step;
		}
		wtab += 3*step;
	}
}


/**************************************************************************************
 * Function:    R4FFT
 *
 * Description: Ken's very fast in-place radix-4 decimation-in-time FFT
 *
 * Inputs:      table index (for transform size)
 *              buffer of samples (non bit-reversed)
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       assumes 5 guard bits in for nfft <= 512
 *              gbOut = gbIn - 4 (assuming input is from PreMultiply)
 *              gains log2(nfft) - 2 int bits total
 *                so gain 7 int bits (LONG), 4 int bits (SHORT)
 **************************************************************************************/
void R4FFT(int tabidx, int *x)
{
	int order = nfftlog2Tab[tabidx];
	int nfft = nfftTab[tabidx];

	/* decimation in time */
	BitReverse(x, tabidx);

	if (order & 0x1) {
		/* long block: order = 9, nfft = 512 */
		R8FirstPass(x, nfft >> 3);						/* gain 1 int bit,  lose 2 GB */
		R4Core(x, nfft >> 5, 8, (int *)twidTabOdd);		/* gain 6 int bits, lose 2 GB */
	} else {
		/* short block: order = 6, nfft = 64 */
		R4FirstPass(x, nfft >> 2);						/* gain 0 int bits, lose 2 GB */
		R4Core(x, nfft >> 4, 4, (int *)twidTabEven);	/* gain 4 int bits, lose 1 GB */
	}
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * hufftabs.c - Huffman symbol tables
 **************************************************************************************/

//#include "coder.h"

const HuffInfo huffTabSpecInfo[11] = {
	/* table 0 not used */
	{11, {  1,  0,  0,  0,  8,  0, 24,  0, 24,  8, 16,  0,  0,  0,  0,  0,  0,  0,  0,  0},   0},
	{ 9, {  0,  0,  1,  1,  7, 24, 15, 19, 14,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0},  81},
	{16, {  1,  0,  0,  4,  2,  6,  3,  5, 15, 15,  8,  9,  3,  3,  5,  2,  0,  0,  0,  0}, 162},
	{12, {  0,  0,  0, 10,  6,  0,  9, 21,  8, 14, 11,  2,  0,  0,  0,  0,  0,  0,  0,  0}, 243},
	{13, {  1,  0,  0,  4,  4,  0,  4, 12, 12, 12, 18, 10,  4,  0,  0,  0,  0,  0,  0,  0}, 324},
	{11, {  0,  0,  0,  9,  0, 16, 13,  8, 23,  8,  4,  0,  0,  0,  0,  0,  0,  0,  0,  0}, 405},
	{12, {  1,  0,  2,  1,  0,  4,  5, 10, 14, 15,  8,  4,  0,  0,  0,  0,  0,  0,  0,  0}, 486},
	{10, {  0,  0,  1,  5,  7, 10, 14, 15,  8,  4,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0}, 550},
	{15, {  1,  0,  2,  1,  0,  4,  3,  8, 11, 20, 31, 38, 32, 14,  4,  0,  0,  0,  0,  0}, 614},
	{12, {  0,  0,  0,  3,  8, 14, 17, 25, 31, 41, 22,  8,  0,  0,  0,  0,  0,  0,  0,  0}, 783},
	{12, {  0,  0,  0,  2,  6,  7, 16, 59, 55, 95, 43,  6,  0,  0,  0,  0,  0,  0,  0,  0}, 952},
};

const signed short huffTabSpec[1241] = {
	/* spectrum table 1 [81] (signed) */
	0x0000, 0x0200, 0x0e00, 0x0007, 0x0040, 0x0001, 0x0038, 0x0008, 0x01c0, 0x03c0, 0x0e40, 0x0039, 0x0078, 0x01c8, 0x000f, 0x0240, 
	0x003f, 0x0fc0, 0x01f8, 0x0238, 0x0047, 0x0e08, 0x0009, 0x0208, 0x01c1, 0x0048, 0x0041, 0x0e38, 0x0201, 0x0e07, 0x0207, 0x0e01, 
	0x01c7, 0x0278, 0x0e78, 0x03c8, 0x004f, 0x0079, 0x01c9, 0x01cf, 0x03f8, 0x0239, 0x007f, 0x0e48, 0x0e0f, 0x0fc8, 0x01f9, 0x03c1, 
	0x03c7, 0x0e47, 0x0ff8, 0x01ff, 0x0049, 0x020f, 0x0241, 0x0e41, 0x0248, 0x0fc1, 0x0e3f, 0x0247, 0x023f, 0x0e39, 0x0fc7, 0x0e09, 
	0x0209, 0x03cf, 0x0e79, 0x0e4f, 0x03f9, 0x0249, 0x0fc9, 0x027f, 0x0fcf, 0x0fff, 0x0279, 0x03c9, 0x0e49, 0x0e7f, 0x0ff9, 0x03ff, 
	0x024f, 
	/* spectrum table 2 [81] (signed) */
	0x0000, 0x0200, 0x0e00, 0x0001, 0x0038, 0x0007, 0x01c0, 0x0008, 0x0040, 0x01c8, 0x0e40, 0x0078, 0x000f, 0x0047, 0x0039, 0x0e07, 
	0x03c0, 0x0238, 0x0fc0, 0x003f, 0x0208, 0x0201, 0x01c1, 0x0e08, 0x0041, 0x01f8, 0x0e01, 0x01c7, 0x0e38, 0x0240, 0x0048, 0x0009, 
	0x0207, 0x0079, 0x0239, 0x0e78, 0x01cf, 0x03c8, 0x0247, 0x0209, 0x0e48, 0x01f9, 0x0248, 0x0e0f, 0x0ff8, 0x0e39, 0x03f8, 0x0278, 
	0x03c1, 0x0e47, 0x0fc8, 0x0e09, 0x0fc1, 0x0fc7, 0x01ff, 0x020f, 0x023f, 0x007f, 0x0049, 0x0e41, 0x0e3f, 0x004f, 0x03c7, 0x01c9, 
	0x0241, 0x03cf, 0x0e79, 0x03f9, 0x0fff, 0x0e4f, 0x0e49, 0x0249, 0x0fcf, 0x03c9, 0x0e7f, 0x0fc9, 0x027f, 0x03ff, 0x0ff9, 0x0279, 
	0x024f, 
	/* spectrum table 3 [81] (unsigned) */
	0x0000, 0x1200, 0x1001, 0x1040, 0x1008, 0x2240, 0x2009, 0x2048, 0x2041, 0x2208, 0x3049, 0x2201, 0x3248, 0x4249, 0x3209, 0x3241, 
	0x1400, 0x1002, 0x200a, 0x2440, 0x3288, 0x2011, 0x3051, 0x2280, 0x304a, 0x3448, 0x1010, 0x2088, 0x2050, 0x1080, 0x2042, 0x2408, 
	0x4289, 0x3089, 0x3250, 0x4251, 0x3281, 0x2210, 0x3211, 0x2081, 0x4449, 0x424a, 0x3441, 0x320a, 0x2012, 0x3052, 0x3488, 0x3290, 
	0x2202, 0x2401, 0x3091, 0x2480, 0x4291, 0x3242, 0x3409, 0x4252, 0x4489, 0x2090, 0x308a, 0x3212, 0x3481, 0x3450, 0x3490, 0x3092, 
	0x4491, 0x4451, 0x428a, 0x4292, 0x2082, 0x2410, 0x3282, 0x3411, 0x444a, 0x3442, 0x4492, 0x448a, 0x4452, 0x340a, 0x2402, 0x3482, 
	0x3412, 
	/* spectrum table 4 [81] (unsigned) */
	0x4249, 0x3049, 0x3241, 0x3248, 0x3209, 0x1200, 0x2240, 0x0000, 0x2009, 0x2208, 0x2201, 0x2048, 0x1001, 0x2041, 0x1008, 0x1040, 
	0x4449, 0x4251, 0x4289, 0x424a, 0x3448, 0x3441, 0x3288, 0x3409, 0x3051, 0x304a, 0x3250, 0x3089, 0x320a, 0x3281, 0x3242, 0x3211, 
	0x2440, 0x2408, 0x2280, 0x2401, 0x2042, 0x2088, 0x200a, 0x2050, 0x2081, 0x2202, 0x2011, 0x2210, 0x1400, 0x1002, 0x1080, 0x1010, 
	0x4291, 0x4489, 0x4451, 0x4252, 0x428a, 0x444a, 0x3290, 0x3488, 0x3450, 0x3091, 0x3052, 0x3481, 0x308a, 0x3411, 0x3212, 0x4491, 
	0x3282, 0x340a, 0x3442, 0x4292, 0x4452, 0x448a, 0x2090, 0x2480, 0x2012, 0x2410, 0x2082, 0x2402, 0x4492, 0x3092, 0x3490, 0x3482, 
	0x3412, 
	/* spectrum table 5 [81] (signed) */
	0x0000, 0x03e0, 0x0020, 0x0001, 0x001f, 0x003f, 0x03e1, 0x03ff, 0x0021, 0x03c0, 0x0002, 0x0040, 0x001e, 0x03df, 0x0041, 0x03fe, 
	0x0022, 0x03c1, 0x005f, 0x03e2, 0x003e, 0x03a0, 0x0060, 0x001d, 0x0003, 0x03bf, 0x0023, 0x0061, 0x03fd, 0x03a1, 0x007f, 0x003d, 
	0x03e3, 0x03c2, 0x0042, 0x03de, 0x005e, 0x03be, 0x007e, 0x03c3, 0x005d, 0x0062, 0x0043, 0x03a2, 0x03dd, 0x001c, 0x0380, 0x0081, 
	0x0080, 0x039f, 0x0004, 0x009f, 0x03fc, 0x0024, 0x03e4, 0x0381, 0x003c, 0x007d, 0x03bd, 0x03a3, 0x03c4, 0x039e, 0x0082, 0x005c, 
	0x0044, 0x0063, 0x0382, 0x03dc, 0x009e, 0x007c, 0x039d, 0x0383, 0x0064, 0x03a4, 0x0083, 0x009d, 0x03bc, 0x009c, 0x0384, 0x0084, 
	0x039c, 
	/* spectrum table 6 [81] (signed) */
	0x0000, 0x0020, 0x001f, 0x0001, 0x03e0, 0x0021, 0x03e1, 0x003f, 0x03ff, 0x005f, 0x0041, 0x03c1, 0x03df, 0x03c0, 0x03e2, 0x0040, 
	0x003e, 0x0022, 0x001e, 0x03fe, 0x0002, 0x005e, 0x03c2, 0x03de, 0x0042, 0x03a1, 0x0061, 0x007f, 0x03e3, 0x03bf, 0x0023, 0x003d, 
	0x03fd, 0x0060, 0x03a0, 0x001d, 0x0003, 0x0062, 0x03be, 0x03c3, 0x0043, 0x007e, 0x005d, 0x03dd, 0x03a2, 0x0063, 0x007d, 0x03bd, 
	0x03a3, 0x003c, 0x03fc, 0x0081, 0x0381, 0x039f, 0x0024, 0x009f, 0x03e4, 0x001c, 0x0382, 0x039e, 0x0044, 0x03dc, 0x0380, 0x0082, 
	0x009e, 0x03c4, 0x0080, 0x005c, 0x0004, 0x03bc, 0x03a4, 0x007c, 0x009d, 0x0064, 0x0083, 0x0383, 0x039d, 0x0084, 0x0384, 0x039c, 
	0x009c, 
	/* spectrum table 7 [64] (unsigned) */
	0x0000, 0x0420, 0x0401, 0x0821, 0x0841, 0x0822, 0x0440, 0x0402, 0x0861, 0x0823, 0x0842, 0x0460, 0x0403, 0x0843, 0x0862, 0x0824, 
	0x0881, 0x0825, 0x08a1, 0x0863, 0x0844, 0x0404, 0x0480, 0x0882, 0x0845, 0x08a2, 0x0405, 0x08c1, 0x04a0, 0x0826, 0x0883, 0x0865, 
	0x0864, 0x08a3, 0x0846, 0x08c2, 0x0827, 0x0866, 0x0406, 0x04c0, 0x0884, 0x08e1, 0x0885, 0x08e2, 0x08a4, 0x08c3, 0x0847, 0x08e3, 
	0x08c4, 0x08a5, 0x0886, 0x0867, 0x04e0, 0x0407, 0x08c5, 0x08a6, 0x08e4, 0x0887, 0x08a7, 0x08e5, 0x08e6, 0x08c6, 0x08c7, 0x08e7, 
	/* spectrum table 8 [64] (unsigned) */
	0x0821, 0x0841, 0x0420, 0x0822, 0x0401, 0x0842, 0x0000, 0x0440, 0x0402, 0x0861, 0x0823, 0x0862, 0x0843, 0x0863, 0x0881, 0x0824, 
	0x0882, 0x0844, 0x0460, 0x0403, 0x0883, 0x0864, 0x08a2, 0x08a1, 0x0845, 0x0825, 0x08a3, 0x0865, 0x0884, 0x08a4, 0x0404, 0x0885, 
	0x0480, 0x0846, 0x08c2, 0x08c1, 0x0826, 0x0866, 0x08c3, 0x08a5, 0x04a0, 0x08c4, 0x0405, 0x0886, 0x08e1, 0x08e2, 0x0847, 0x08c5, 
	0x08e3, 0x0827, 0x08a6, 0x0867, 0x08c6, 0x08e4, 0x04c0, 0x0887, 0x0406, 0x08e5, 0x08e6, 0x08c7, 0x08a7, 0x04e0, 0x0407, 0x08e7, 	
	/* spectrum table 9 [169] (unsigned) */
	0x0000, 0x0420, 0x0401, 0x0821, 0x0841, 0x0822, 0x0440, 0x0402, 0x0861, 0x0842, 0x0823, 0x0460, 0x0403, 0x0843, 0x0862, 0x0824, 
	0x0881, 0x0844, 0x0825, 0x0882, 0x0863, 0x0404, 0x0480, 0x08a1, 0x0845, 0x0826, 0x0864, 0x08a2, 0x08c1, 0x0883, 0x0405, 0x0846, 
	0x04a0, 0x0827, 0x0865, 0x0828, 0x0901, 0x0884, 0x08a3, 0x08c2, 0x08e1, 0x0406, 0x0902, 0x0848, 0x0866, 0x0847, 0x0885, 0x0921, 
	0x0829, 0x08e2, 0x04c0, 0x08a4, 0x08c3, 0x0903, 0x0407, 0x0922, 0x0868, 0x0886, 0x0867, 0x0408, 0x0941, 0x08c4, 0x0849, 0x08a5, 
	0x0500, 0x04e0, 0x08e3, 0x0942, 0x0923, 0x0904, 0x082a, 0x08e4, 0x08c5, 0x08a6, 0x0888, 0x0887, 0x0869, 0x0961, 0x08a8, 0x0520, 
	0x0905, 0x0943, 0x084a, 0x0409, 0x0962, 0x0924, 0x08c6, 0x0981, 0x0889, 0x0906, 0x082b, 0x0925, 0x0944, 0x08a7, 0x08e5, 0x084b, 
	0x082c, 0x0982, 0x0963, 0x086a, 0x08a9, 0x08c7, 0x0907, 0x0964, 0x040a, 0x08e6, 0x0983, 0x0540, 0x0945, 0x088a, 0x08c8, 0x084c, 
	0x0926, 0x0927, 0x088b, 0x0560, 0x08c9, 0x086b, 0x08aa, 0x0908, 0x08e8, 0x0985, 0x086c, 0x0965, 0x08e7, 0x0984, 0x0966, 0x0946, 
	0x088c, 0x08e9, 0x08ab, 0x040b, 0x0986, 0x08ca, 0x0580, 0x0947, 0x08ac, 0x08ea, 0x0928, 0x040c, 0x0967, 0x0909, 0x0929, 0x0948, 
	0x08eb, 0x0987, 0x08cb, 0x090b, 0x0968, 0x08ec, 0x08cc, 0x090a, 0x0949, 0x090c, 0x092a, 0x092b, 0x092c, 0x094b, 0x0989, 0x094a, 
	0x0969, 0x0988, 0x096a, 0x098a, 0x098b, 0x094c, 0x096b, 0x096c, 0x098c, 
	/* spectrum table 10 [169] (unsigned) */
	0x0821, 0x0822, 0x0841, 0x0842, 0x0420, 0x0401, 0x0823, 0x0862, 0x0861, 0x0843, 0x0863, 0x0440, 0x0402, 0x0844, 0x0882, 0x0824, 
	0x0881, 0x0000, 0x0883, 0x0864, 0x0460, 0x0403, 0x0884, 0x0845, 0x08a2, 0x0825, 0x08a1, 0x08a3, 0x0865, 0x08a4, 0x0885, 0x08c2, 
	0x0846, 0x08c3, 0x0480, 0x08c1, 0x0404, 0x0826, 0x0866, 0x08a5, 0x08c4, 0x0886, 0x08c5, 0x08e2, 0x0867, 0x0847, 0x08a6, 0x0902, 
	0x08e3, 0x04a0, 0x08e1, 0x0405, 0x0901, 0x0827, 0x0903, 0x08e4, 0x0887, 0x0848, 0x08c6, 0x08e5, 0x0828, 0x0868, 0x0904, 0x0888, 
	0x08a7, 0x0905, 0x08a8, 0x08e6, 0x08c7, 0x0922, 0x04c0, 0x08c8, 0x0923, 0x0869, 0x0921, 0x0849, 0x0406, 0x0906, 0x0924, 0x0889, 
	0x0942, 0x0829, 0x08e7, 0x0907, 0x0925, 0x08e8, 0x0943, 0x08a9, 0x0944, 0x084a, 0x0941, 0x086a, 0x0926, 0x08c9, 0x0500, 0x088a, 
	0x04e0, 0x0962, 0x08e9, 0x0963, 0x0946, 0x082a, 0x0961, 0x0927, 0x0407, 0x0908, 0x0945, 0x086b, 0x08aa, 0x0909, 0x0965, 0x0408, 
	0x0964, 0x084b, 0x08ea, 0x08ca, 0x0947, 0x088b, 0x082b, 0x0982, 0x0928, 0x0983, 0x0966, 0x08ab, 0x0984, 0x0967, 0x0985, 0x086c, 
	0x08cb, 0x0520, 0x0948, 0x0540, 0x0981, 0x0409, 0x088c, 0x0929, 0x0986, 0x084c, 0x090a, 0x092a, 0x082c, 0x0968, 0x0987, 0x08eb, 
	0x08ac, 0x08cc, 0x0949, 0x090b, 0x0988, 0x040a, 0x08ec, 0x0560, 0x094a, 0x0969, 0x096a, 0x040b, 0x096b, 0x092b, 0x094b, 0x0580, 
	0x090c, 0x0989, 0x094c, 0x092c, 0x096c, 0x098b, 0x040c, 0x098a, 0x098c, 
	/* spectrum table 11 [289] (unsigned) */
	0x0000, 0x2041, 0x2410, 0x1040, 0x1001, 0x2081, 0x2042, 0x2082, 0x2043, 0x20c1, 0x20c2, 0x1080, 0x2083, 0x1002, 0x20c3, 0x2101, 
	0x2044, 0x2102, 0x2084, 0x2103, 0x20c4, 0x10c0, 0x1003, 0x2141, 0x2142, 0x2085, 0x2104, 0x2045, 0x2143, 0x20c5, 0x2144, 0x2105, 
	0x2182, 0x2086, 0x2181, 0x2183, 0x20c6, 0x2046, 0x2110, 0x20d0, 0x2405, 0x2403, 0x2404, 0x2184, 0x2406, 0x1100, 0x2106, 0x1004, 
	0x2090, 0x2145, 0x2150, 0x2407, 0x2402, 0x2408, 0x2087, 0x21c2, 0x20c7, 0x2185, 0x2146, 0x2190, 0x240a, 0x21c3, 0x21c1, 0x2409, 
	0x21d0, 0x2050, 0x2047, 0x2107, 0x240b, 0x21c4, 0x240c, 0x2210, 0x2401, 0x2186, 0x2250, 0x2088, 0x2147, 0x2290, 0x240d, 0x2203, 
	0x2202, 0x20c8, 0x1140, 0x240e, 0x22d0, 0x21c5, 0x2108, 0x2187, 0x21c6, 0x1005, 0x2204, 0x240f, 0x2310, 0x2048, 0x2201, 0x2390, 
	0x2148, 0x2350, 0x20c9, 0x2205, 0x21c7, 0x2089, 0x2206, 0x2242, 0x2243, 0x23d0, 0x2109, 0x2188, 0x1180, 0x2244, 0x2149, 0x2207, 
	0x21c8, 0x2049, 0x2283, 0x1006, 0x2282, 0x2241, 0x2245, 0x210a, 0x208a, 0x2246, 0x20ca, 0x2189, 0x2284, 0x2208, 0x2285, 0x2247, 
	0x22c3, 0x204a, 0x11c0, 0x2286, 0x21c9, 0x20cb, 0x214a, 0x2281, 0x210b, 0x22c2, 0x2342, 0x218a, 0x2343, 0x208b, 0x1400, 0x214b, 
	0x22c5, 0x22c4, 0x2248, 0x21ca, 0x2209, 0x1010, 0x210d, 0x1007, 0x20cd, 0x22c6, 0x2341, 0x2344, 0x2303, 0x208d, 0x2345, 0x220a, 
	0x218b, 0x2288, 0x2287, 0x2382, 0x2304, 0x204b, 0x210c, 0x22c1, 0x20cc, 0x204d, 0x2302, 0x21cb, 0x20ce, 0x214c, 0x214d, 0x2384, 
	0x210e, 0x22c7, 0x2383, 0x2305, 0x2346, 0x2306, 0x1200, 0x22c8, 0x208c, 0x2249, 0x2385, 0x218d, 0x228a, 0x23c2, 0x220b, 0x224a, 
	0x2386, 0x2289, 0x214e, 0x22c9, 0x2381, 0x208e, 0x218c, 0x204c, 0x2348, 0x1008, 0x2347, 0x21cc, 0x2307, 0x21cd, 0x23c3, 0x2301, 
	0x218e, 0x208f, 0x23c5, 0x23c4, 0x204e, 0x224b, 0x210f, 0x2387, 0x220d, 0x2349, 0x220c, 0x214f, 0x20cf, 0x228b, 0x22ca, 0x2308, 
	0x23c6, 0x23c7, 0x220e, 0x23c1, 0x21ce, 0x1240, 0x1009, 0x224d, 0x224c, 0x2309, 0x2388, 0x228d, 0x2389, 0x230a, 0x218f, 0x21cf, 
	0x224e, 0x23c8, 0x22cb, 0x22ce, 0x204f, 0x228c, 0x228e, 0x234b, 0x234a, 0x22cd, 0x22cc, 0x220f, 0x238b, 0x234c, 0x230d, 0x23c9, 
	0x238a, 0x1280, 0x230b, 0x224f, 0x100a, 0x230c, 0x12c0, 0x230e, 0x228f, 0x234d, 0x100d, 0x238c, 0x23ca, 0x23cb, 0x22cf, 0x238d, 
	0x1340, 0x100b, 0x234e, 0x23cc, 0x23cd, 0x230f, 0x1380, 0x238e, 0x234f, 0x1300, 0x238f, 0x100e, 0x100c, 0x23ce, 0x13c0, 0x100f, 
	0x23cf, 
};

const HuffInfo huffTabScaleFactInfo = 
	{19, { 1,  0,  1,  3,  2,  4,  3,  5,  4,  6,  6,  6,  5,  8,  4,  7,  3,  7, 46,  0},   0};

/* note - includes offset of -60 (4.6.2.3 in spec) */
const signed short huffTabScaleFact[121] = {
		/* scale factor table [121] */
	   0,   -1,    1,   -2,    2,   -3,    3,   -4,    4,   -5,    5,    6,   -6,    7,   -7,    8,
	  -8,    9,   -9,   10,  -10,  -11,   11,   12,  -12,   13,  -13,   14,  -14,   16,   15,   17,
	  18,  -15,  -17,  -16,   19,  -18,  -19,   20,  -20,   21,  -21,   22,  -22,   23,  -23,  -25,
	  25,  -27,  -24,  -26,   24,  -28,   27,   29,  -30,  -29,   26,  -31,  -34,  -33,  -32,  -36,
	  28,  -35,  -38,  -37,   30,  -39,  -41,  -57,  -59,  -58,  -60,   38,   39,   40,   41,   42,
	  57,   37,   31,   32,   33,   34,   35,   36,   44,   51,   52,   53,   54,   55,   56,   50,
	  45,   46,   47,   48,   49,   58,  -54,  -52,  -51,  -50,  -55,   43,   60,   59,  -56,  -53,
	 -45,  -44,  -42,  -40,  -43,  -49,  -48,  -46,  -47,
};




/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * huffman.c - Huffman decoding
 **************************************************************************************/

//#include "coder.h"

/**************************************************************************************
 * Function:    DecodeHuffmanScalar
 *
 * Description: decode one Huffman symbol from bitstream
 *
 * Inputs:      pointers to Huffman table and info struct
 *              left-aligned bit buffer with >= huffTabInfo->maxBits bits
 *
 * Outputs:     decoded symbol in *val
 *
 * Return:      number of bits in symbol
 *
 * Notes:       assumes canonical Huffman codes:
 *                first CW always 0, we have "count" CW's of length "nBits" bits
 *                starting CW for codes of length nBits+1 = 
 *                  (startCW[nBits] + count[nBits]) << 1
 *                if there are no codes at nBits, then we just keep << 1 each time 
 *                  (since count[nBits] = 0)
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ int DecodeHuffmanScalar(const signed short *huffTab, const HuffInfo *huffTabInfo, unsigned int bitBuf, signed int *val)
{
    unsigned int count, start, shift, t;
	const unsigned char *countPtr;
	const signed short *map;

	map = huffTab + huffTabInfo->offset;
	countPtr = huffTabInfo->count;

	start = 0;
	count = 0;
	shift = 32;
	do {
		start += count;
		start <<= 1;
		map += count;
		count = *countPtr++;
		shift--;
		t = (bitBuf >> shift) - start;
	} while (t >= count);
	
	*val = (signed int)map[t];
	return (countPtr - huffTabInfo->count);
}

#define APPLY_SIGN(v, s)		{(v) ^= ((signed int)(s) >> 31); (v) -= ((signed int)(s) >> 31);}

#define GET_QUAD_SIGNBITS(v)	(((unsigned int)(v) << 17) >> 29)	/* bits 14-12, unsigned */
#define GET_QUAD_W(v)			(((signed int)(v) << 20) >>   29)	/* bits 11-9, sign-extend */
#define GET_QUAD_X(v)			(((signed int)(v) << 23) >>   29)	/* bits  8-6, sign-extend */
#define GET_QUAD_Y(v)			(((signed int)(v) << 26) >>   29)	/* bits  5-3, sign-extend */
#define GET_QUAD_Z(v)			(((signed int)(v) << 29) >>   29)	/* bits  2-0, sign-extend */

#define GET_PAIR_SIGNBITS(v)	(((unsigned int)(v) << 20) >> 30)	/* bits 11-10, unsigned */
#define GET_PAIR_Y(v)			(((signed int)(v) << 22) >>   27)	/* bits  9-5, sign-extend */
#define GET_PAIR_Z(v)			(((signed int)(v) << 27) >>   27)	/* bits  4-0, sign-extend */

#define GET_ESC_SIGNBITS(v)		(((unsigned int)(v) << 18) >> 30)	/* bits 13-12, unsigned */
#define GET_ESC_Y(v)			(((signed int)(v) << 20) >>   26)	/* bits 11-6, sign-extend */
#define GET_ESC_Z(v)			(((signed int)(v) << 26) >>   26)	/* bits  5-0, sign-extend */

/**************************************************************************************
 * Function:    UnpackZeros
 *
 * Description: fill a section of coefficients with zeros
 *
 * Inputs:      number of coefficients
 *
 * Outputs:     nVals zeros, starting at coef
 *
 * Return:      none
 *
 * Notes:       assumes nVals is always a multiple of 4 because all scalefactor bands
 *                are a multiple of 4 coefficients long
 **************************************************************************************/
static void UnpackZeros(int nVals, int *coef)
{
	while (nVals > 0) {
		*coef++ = 0;
		*coef++ = 0;
		*coef++ = 0;
		*coef++ = 0;
		nVals -= 4;
	}
}

/**************************************************************************************
 * Function:    UnpackQuads
 *
 * Description: decode a section of 4-way vector Huffman coded coefficients
 *
 * Inputs       BitStreamInfo struct pointing to start of codewords for this section
 *              index of Huffman codebook
 *              number of coefficients
 *
 * Outputs:     nVals coefficients, starting at coef
 *
 * Return:      none
 *
 * Notes:       assumes nVals is always a multiple of 4 because all scalefactor bands
 *                are a multiple of 4 coefficients long
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ static void UnpackQuads(BitStreamInfo *bsi, int cb, int nVals, int *coef)
{
	int w, x, y, z, maxBits, nCodeBits, nSignBits, val;
	unsigned int bitBuf;

	maxBits = huffTabSpecInfo[cb - HUFFTAB_SPEC_OFFSET].maxBits + 4;
	while (nVals > 0) {
		/* decode quad */
		bitBuf = GetBitsNoAdvance(bsi, maxBits) << (32 - maxBits);
		nCodeBits = DecodeHuffmanScalar(huffTabSpec, &huffTabSpecInfo[cb - HUFFTAB_SPEC_OFFSET], bitBuf, &val);

		w = GET_QUAD_W(val);
		x = GET_QUAD_X(val);
		y = GET_QUAD_Y(val);
		z = GET_QUAD_Z(val);

		bitBuf <<= nCodeBits;
		nSignBits = (int)GET_QUAD_SIGNBITS(val);
		AdvanceBitstream(bsi, nCodeBits + nSignBits);
		if (nSignBits) {
			if (w)	{APPLY_SIGN(w, bitBuf); bitBuf <<= 1;}
			if (x)	{APPLY_SIGN(x, bitBuf); bitBuf <<= 1;}
			if (y)	{APPLY_SIGN(y, bitBuf); bitBuf <<= 1;}
			if (z)	{APPLY_SIGN(z, bitBuf); bitBuf <<= 1;}
		}
		*coef++ = w; *coef++ = x; *coef++ = y; *coef++ = z;
		nVals -= 4;
	}
}

/**************************************************************************************
 * Function:    UnpackPairsNoEsc
 *
 * Description: decode a section of 2-way vector Huffman coded coefficients,
 *                using non-esc tables (5 through 10)
 *
 * Inputs       BitStreamInfo struct pointing to start of codewords for this section
 *              index of Huffman codebook (must not be the escape codebook)
 *              number of coefficients
 *
 * Outputs:     nVals coefficients, starting at coef
 *
 * Return:      none
 *
 * Notes:       assumes nVals is always a multiple of 2 because all scalefactor bands
 *                are a multiple of 4 coefficients long
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ static void UnpackPairsNoEsc(BitStreamInfo *bsi, int cb, int nVals, int *coef)
{
	int y, z, maxBits, nCodeBits, nSignBits, val;
	unsigned int bitBuf;

	maxBits = huffTabSpecInfo[cb - HUFFTAB_SPEC_OFFSET].maxBits + 2;
	while (nVals > 0) {
		/* decode pair */
		bitBuf = GetBitsNoAdvance(bsi, maxBits) << (32 - maxBits);
		nCodeBits = DecodeHuffmanScalar(huffTabSpec, &huffTabSpecInfo[cb-HUFFTAB_SPEC_OFFSET], bitBuf, &val);

		y = GET_PAIR_Y(val);
		z = GET_PAIR_Z(val);

		bitBuf <<= nCodeBits;
		nSignBits = GET_PAIR_SIGNBITS(val);
		AdvanceBitstream(bsi, nCodeBits + nSignBits);
		if (nSignBits) {
			if (y)	{APPLY_SIGN(y, bitBuf); bitBuf <<= 1;}
			if (z)	{APPLY_SIGN(z, bitBuf); bitBuf <<= 1;}
		}
		*coef++ = y; *coef++ = z;
		nVals -= 2;
	}
}

/**************************************************************************************
 * Function:    UnpackPairsEsc
 *
 * Description: decode a section of 2-way vector Huffman coded coefficients,
 *                using esc table (11)
 *
 * Inputs       BitStreamInfo struct pointing to start of codewords for this section
 *              index of Huffman codebook (must be the escape codebook)
 *              number of coefficients
 *
 * Outputs:     nVals coefficients, starting at coef
 *
 * Return:      none
 *
 * Notes:       assumes nVals is always a multiple of 2 because all scalefactor bands
 *                are a multiple of 4 coefficients long
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ static void UnpackPairsEsc(BitStreamInfo *bsi, int cb, int nVals, int *coef)
{
	int y, z, maxBits, nCodeBits, nSignBits, n, val;
	unsigned int bitBuf;

	maxBits = huffTabSpecInfo[cb - HUFFTAB_SPEC_OFFSET].maxBits + 2;
	while (nVals > 0) {
		/* decode pair with escape value */
		bitBuf = GetBitsNoAdvance(bsi, maxBits) << (32 - maxBits);
		nCodeBits = DecodeHuffmanScalar(huffTabSpec, &huffTabSpecInfo[cb-HUFFTAB_SPEC_OFFSET], bitBuf, &val);

		y = GET_ESC_Y(val);
		z = GET_ESC_Z(val);

		bitBuf <<= nCodeBits;
		nSignBits = GET_ESC_SIGNBITS(val);
		AdvanceBitstream(bsi, nCodeBits + nSignBits);
	
		if (y == 16) {
			n = 4;
			while (GetBits(bsi, 1) == 1)
				n++;
			y = (1 << n) + GetBits(bsi, n);
		}
		if (z == 16) {
			n = 4;
			while (GetBits(bsi, 1) == 1)
				n++;
			z = (1 << n) + GetBits(bsi, n);
		}

		if (nSignBits) {
			if (y)	{APPLY_SIGN(y, bitBuf); bitBuf <<= 1;}
			if (z)	{APPLY_SIGN(z, bitBuf); bitBuf <<= 1;}
		}

		*coef++ = y; *coef++ = z;
		nVals -= 2;
	}
}

/**************************************************************************************
 * Function:    DecodeSpectrumLong
 *
 * Description: decode transform coefficients for frame with one long block
 *
 * Inputs:      platform specific info struct
 *              BitStreamInfo struct pointing to start of spectral data
 *                (14496-3, table 4.4.29) 
 *              index of current channel
 *
 * Outputs:     decoded, quantized coefficients for this channel
 *
 * Return:      none
 *
 * Notes:       adds in pulse data if present
 *              fills coefficient buffer with zeros in any region not coded with
 *                codebook in range [1, 11] (including sfb's above sfbMax)
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ void DecodeSpectrumLong(PSInfoBase *psi, BitStreamInfo *bsi, int ch)
{
	int i, sfb, cb, nVals, offset;
	const short *sfbTab;
	unsigned char *sfbCodeBook;
	int *coef;
	ICSInfo *icsInfo;
	PulseInfo *pi;

	coef = psi->coef[ch];
	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);

	/* decode long block */
	sfbTab = sfBandTabLong + sfBandTabLongOffset[psi->sampRateIdx];
	sfbCodeBook = psi->sfbCodeBook[ch];
	for (sfb = 0; sfb < icsInfo->maxSFB; sfb++) {
		cb = *sfbCodeBook++;
		nVals = sfbTab[sfb+1] - sfbTab[sfb];
		
		if (cb == 0)
			UnpackZeros(nVals, coef);
		else if (cb <= 4)
			UnpackQuads(bsi, cb, nVals, coef);
		else if (cb <= 10)
			UnpackPairsNoEsc(bsi, cb, nVals, coef);
		else if (cb == 11)
			UnpackPairsEsc(bsi, cb, nVals, coef);
		else
			UnpackZeros(nVals, coef);

		coef += nVals;
	}

	/* fill with zeros above maxSFB */
	nVals = NSAMPS_LONG - sfbTab[sfb];
	UnpackZeros(nVals, coef);

	/* add pulse data, if present */
	pi = &psi->pulseInfo[ch];
	if (pi->pulseDataPresent) {
		coef = psi->coef[ch];
		offset = sfbTab[pi->startSFB];
		for (i = 0; i < pi->numPulse; i++) {
			offset += pi->offset[i];
			if (coef[offset] > 0)
				coef[offset] += pi->amp[i];
			else
				coef[offset] -= pi->amp[i];
		}
		ASSERT(offset < NSAMPS_LONG);
	}
}

/**************************************************************************************
 * Function:    DecodeSpectrumShort
 *
 * Description: decode transform coefficients for frame with eight short blocks
 *
 * Inputs:      platform specific info struct
 *              BitStreamInfo struct pointing to start of spectral data
 *                (14496-3, table 4.4.29) 
 *              index of current channel
 *
 * Outputs:     decoded, quantized coefficients for this channel
 *
 * Return:      none
 *
 * Notes:       fills coefficient buffer with zeros in any region not coded with
 *                codebook in range [1, 11] (including sfb's above sfbMax)
 *              deinterleaves window groups into 8 windows
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ void DecodeSpectrumShort(PSInfoBase *psi, BitStreamInfo *bsi, int ch)
{
	int gp, cb, nVals=0, win, offset, sfb;
	const short *sfbTab;
	unsigned char *sfbCodeBook;
	int *coef;
	ICSInfo *icsInfo;

	coef = psi->coef[ch];
	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);

	/* decode short blocks, deinterleaving in-place */
	sfbTab = sfBandTabShort + sfBandTabShortOffset[psi->sampRateIdx];
	sfbCodeBook = psi->sfbCodeBook[ch];
	for (gp = 0; gp < icsInfo->numWinGroup; gp++) {
		for (sfb = 0; sfb < icsInfo->maxSFB; sfb++) {
			nVals = sfbTab[sfb+1] - sfbTab[sfb];
			cb = *sfbCodeBook++;

			for (win = 0; win < icsInfo->winGroupLen[gp]; win++) {
				offset = win*NSAMPS_SHORT;
				if (cb == 0)
					UnpackZeros(nVals, coef + offset);
				else if (cb <= 4)
					UnpackQuads(bsi, cb, nVals, coef + offset);
				else if (cb <= 10)
					UnpackPairsNoEsc(bsi, cb, nVals, coef + offset);
				else if (cb == 11)
					UnpackPairsEsc(bsi, cb, nVals, coef + offset);
				else 
					UnpackZeros(nVals, coef + offset);
			}
			coef += nVals;
		}

		/* fill with zeros above maxSFB */
		for (win = 0; win < icsInfo->winGroupLen[gp]; win++) {
			offset = win*NSAMPS_SHORT;
			nVals = NSAMPS_SHORT - sfbTab[sfb];
			UnpackZeros(nVals, coef + offset);
		}
		coef += nVals;
		coef += (icsInfo->winGroupLen[gp] - 1)*NSAMPS_SHORT;
	}

	ASSERT(coef == psi->coef[ch] + NSAMPS_LONG);
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * pns.c - perceptual noise substitution
 **************************************************************************************/

//#include "coder.h"
////#include "assembly.h"

/**************************************************************************************
 * Function:    Get32BitVal
 *
 * Description: generate 32-bit unsigned random number
 *
 * Inputs:      last number calculated (seed, first time through)
 *
 * Outputs:     new number, saved in *last
 *
 * Return:      32-bit number, uniformly distributed between [0, 2^32)
 *
 * Notes:       uses simple linear congruential generator
 **************************************************************************************/
static unsigned int Get32BitVal(unsigned int *last)
{
	unsigned int r = *last;

	/* use same coefs as MPEG reference code (classic LCG)
	 * use unsigned multiply to force reliable wraparound behavior in C (mod 2^32)
	 */
	r = (1664525U * r) + 1013904223U;
	*last = r;

	return r;
}


#define NUM_ITER_INVSQRT	4

#define X0_COEF_2	0xc0000000	/* Q29: -2.0 */
#define X0_OFF_2	0x60000000	/* Q29:  3.0 */
#define Q26_3		0x0c000000	/* Q26:  3.0 */

/**************************************************************************************
 * Function:    InvRootR
 *
 * Description: use Newton's method to solve for x = 1/sqrt(r)
 *
 * Inputs:      r in Q30 format, range = [0.25, 1] (normalize inputs to this range)
 *
 * Outputs:     none
 *
 * Return:      x = Q29, range = (1, 2)
 *
 * Notes:       guaranteed to converge and not overflow for any r in this range
 *              
 *              xn+1  = xn - f(xn)/f'(xn)
 *              f(x)  = 1/sqrt(r) - x = 0 (find root)
 *                    = 1/x^2 - r
 *              f'(x) = -2/x^3
 *
 *              so xn+1 = xn/2 * (3 - r*xn^2)
 *
 *              NUM_ITER_INVSQRT = 3, maxDiff = 1.3747e-02
 *              NUM_ITER_INVSQRT = 4, maxDiff = 3.9832e-04
 **************************************************************************************/
static int InvRootR(int r)
{
	int i, xn, t;

	/* use linear equation for initial guess
	 * x0 = -2*r + 3 (so x0 always >= correct answer in range [0.25, 1))
	 * xn = Q29 (at every step)
	 */
	xn = (MULSHIFT32(r, X0_COEF_2) << 2) + X0_OFF_2;

	for (i = 0; i < NUM_ITER_INVSQRT; i++) {
		t = MULSHIFT32(xn, xn);					/* Q26 = Q29*Q29 */
		t = Q26_3 - (MULSHIFT32(r, t) << 2);	/* Q26 = Q26 - (Q31*Q26 << 1) */
		xn = MULSHIFT32(xn, t) << (6 - 1);		/* Q29 = (Q29*Q26 << 6), and -1 for division by 2 */
	}

	/* clip to range (1.0, 2.0) 
	 * (because of rounding, this can converge to xn slightly > 2.0 when r is near 0.25)
	 */
	if (xn >> 30)
		xn = (1 << 30) - 1;

	return xn;
}

/**************************************************************************************
 * Function:    ScaleNoiseVector
 *
 * Description: apply scaling to vector of noise coefficients for one scalefactor band
 *
 * Inputs:      unscaled coefficients
 *              number of coefficients in vector (one scalefactor band of coefs)
 *              scalefactor for this band (i.e. noise energy)
 *
 * Outputs:     nVals coefficients in Q(FBITS_OUT_DQ_OFF)
 *
 * Return:      guard bit mask (OR of abs value of all noise coefs)
 **************************************************************************************/
static int ScaleNoiseVector(int *coef, int nVals, int sf)
{

/* pow(2, i/4.0) for i = [0,1,2,3], format = Q30 */
static const int pow14[4] = { 
	0x40000000, 0x4c1bf829, 0x5a82799a, 0x6ba27e65
};

	int i, c, spec, energy, sq, scalef, scalei, invSqrtEnergy, z, gbMask;
	
	energy = 0;
	for (i = 0; i < nVals; i++) {
		spec = coef[i];

		/* max nVals = max SFB width = 96, so energy can gain < 2^7 bits in accumulation */
		sq = (spec * spec) >> 8;		/* spec*spec range = (-2^30, 2^30) */
		energy += sq;
	}

	/* unless nVals == 1 (or the number generator is broken...), this should not happen */
	if (energy == 0)
		return 0;	/* coef[i] must = 0 for i = [0, nVals-1], so gbMask = 0 */

	/* pow(2, sf/4) * pow(2, FBITS_OUT_DQ_OFF) */
	scalef = pow14[sf & 0x3];
	scalei = (sf >> 2) + FBITS_OUT_DQ_OFF;

	/* energy has implied factor of 2^-8 since we shifted the accumulator 
	 * normalize energy to range [0.25, 1.0), calculate 1/sqrt(1), and denormalize
	 *   i.e. divide input by 2^(30-z) and convert to Q30
	 *        output of 1/sqrt(i) now has extra factor of 2^((30-z)/2)
	 *        for energy > 0, z is an even number between 0 and 28
	 * final scaling of invSqrtEnergy:
	 *  2^(15 - z/2) to compensate for implicit 2^(30-z) factor in input
	 *  +4 to compensate for implicit 2^-8 factor in input
	 */
	z = CLZ(energy) - 2;					/* energy has at least 2 leading zeros (see acc loop) */
	z &= 0xfffffffe;						/* force even */
	invSqrtEnergy = InvRootR(energy << z);	/* energy << z must be in range [0x10000000, 0x40000000] */
	scalei -= (15 - z/2 + 4);				/* nInt = 1/sqrt(energy) in Q29 */

	/* normalize for final scaling */
	z = CLZ(invSqrtEnergy) - 1;
	invSqrtEnergy <<= z;
	scalei -= (z - 3 - 2);	/* -2 for scalef, z-3 for invSqrtEnergy */
	scalef = MULSHIFT32(scalef, invSqrtEnergy);	/* scalef (input) = Q30, invSqrtEnergy = Q29 * 2^z */
	gbMask = 0;

	if (scalei < 0) {
		scalei = -scalei;
		if (scalei > 31)
			scalei = 31;
		for (i = 0; i < nVals; i++) {
			c = MULSHIFT32(coef[i], scalef) >> scalei;
			gbMask |= FASTABS(c);
			coef[i] = c;
		}
	} else {
		/* for scalei <= 16, no clipping possible (coef[i] is < 2^15 before scaling) 
		 * for scalei > 16, just saturate exponent (rare)
		 *   scalef is close to full-scale (since we normalized invSqrtEnergy)
		 * remember, we are just producing noise here
		 */
		if (scalei > 16)
			scalei = 16;
		for (i = 0; i < nVals; i++) {
			c = MULSHIFT32(coef[i] << scalei, scalef);
			coef[i] = c;
			gbMask |= FASTABS(c);
		}
	}

	return gbMask;
}

/**************************************************************************************
 * Function:    GenerateNoiseVector
 *
 * Description: create vector of noise coefficients for one scalefactor band
 *
 * Inputs:      seed for number generator
 *              number of coefficients to generate
 *
 * Outputs:     buffer of nVals coefficients, range = [-2^15, 2^15)
 *              updated seed for number generator
 *
 * Return:      none
 **************************************************************************************/
static void GenerateNoiseVector(int *coef, int *last, int nVals)
{
	int i;
	
	for (i = 0; i < nVals; i++)
		coef[i] = ((signed int)Get32BitVal((unsigned int *)last)) >> 16;
}

/**************************************************************************************
 * Function:    CopyNoiseVector
 *
 * Description: copy vector of noise coefficients for one scalefactor band from L to R
 *
 * Inputs:      buffer of left coefficients
 *              number of coefficients to copy
 *
 * Outputs:     buffer of right coefficients
 *
 * Return:      none
 **************************************************************************************/
static void CopyNoiseVector(int *coefL, int *coefR, int nVals)
{
	int i;

	for (i = 0; i < nVals; i++)
		coefR[i] = coefL[i];
}

/**************************************************************************************
 * Function:    PNS
 *
 * Description: apply perceptual noise substitution, if enabled (MPEG-4 only)
 *
 * Inputs:      valid AACDecInfo struct
 *              index of current channel
 *
 * Outputs:     shaped noise in scalefactor bands where PNS is active
 *              updated minimum guard bit count for this channel
 *
 * Return:      0 if successful, -1 if error
 **************************************************************************************/
int PNS(AACDecInfo *aacDecInfo, int ch)
{
	int gp, sfb, win, width, nSamps, gb, gbMask;
	int *coef;
	const short *sfbTab;
	unsigned char *sfbCodeBook;
	short *scaleFactors;
	int msMaskOffset, checkCorr, genNew;
	unsigned char msMask;
	unsigned char *msMaskPtr;
	PSInfoBase *psi;
	ICSInfo *icsInfo;
	
	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);
	
	if (!psi->pnsUsed[ch])
		return 0;
	
	if (icsInfo->winSequence == 2) {
		sfbTab = sfBandTabShort + sfBandTabShortOffset[psi->sampRateIdx];
		nSamps = NSAMPS_SHORT;
	} else {
		sfbTab = sfBandTabLong + sfBandTabLongOffset[psi->sampRateIdx];
		nSamps = NSAMPS_LONG;
	}
	coef = psi->coef[ch];
	sfbCodeBook = psi->sfbCodeBook[ch];
	scaleFactors = psi->scaleFactors[ch];
	checkCorr = (aacDecInfo->currBlockID == AAC_ID_CPE && psi->commonWin == 1 ? 1 : 0);
	
	gbMask = 0;
	for (gp = 0; gp < icsInfo->numWinGroup; gp++) {
		for (win = 0; win < icsInfo->winGroupLen[gp]; win++) {
			msMaskPtr = psi->msMaskBits + ((gp*icsInfo->maxSFB) >> 3);
			msMaskOffset = ((gp*icsInfo->maxSFB) & 0x07);
			msMask = (*msMaskPtr++) >> msMaskOffset;
			
			for (sfb = 0; sfb < icsInfo->maxSFB; sfb++) {
				width = sfbTab[sfb+1] - sfbTab[sfb];
				if (sfbCodeBook[sfb] == 13) {
					if (ch == 0) {
						/* generate new vector, copy into ch 1 if it's possible that the channels will be correlated 
						 * if ch 1 has PNS enabled for this SFB but it's uncorrelated (i.e. ms_used == 0),
						 *    the copied values will be overwritten when we process ch 1
						 */
						GenerateNoiseVector(coef, &psi->pnsLastVal, width);
						if (checkCorr && psi->sfbCodeBook[1][gp*icsInfo->maxSFB + sfb] == 13)
							CopyNoiseVector(coef, psi->coef[1] + (coef - psi->coef[0]), width);
					} else {
						/* generate new vector if no correlation between channels */
						genNew = 1;
						if (checkCorr && psi->sfbCodeBook[0][gp*icsInfo->maxSFB + sfb] == 13) {
							if ( (psi->msMaskPresent == 1 && (msMask & 0x01)) || psi->msMaskPresent == 2 )
								genNew = 0;
						}
						if (genNew)
							GenerateNoiseVector(coef, &psi->pnsLastVal, width);
					}
					gbMask |= ScaleNoiseVector(coef, width, psi->scaleFactors[ch][gp*icsInfo->maxSFB + sfb]);
				}
				coef += width;
				
				/* get next mask bit (should be branchless on ARM) */
				msMask >>= 1;
				if (++msMaskOffset == 8) {
					msMask = *msMaskPtr++;
					msMaskOffset = 0;
				}
			}
			coef += (nSamps - sfbTab[icsInfo->maxSFB]);
		}
		sfbCodeBook += icsInfo->maxSFB;
		scaleFactors += icsInfo->maxSFB;
	}
	
	/* update guard bit count if necessary */
	gb = CLZ(gbMask) - 1;
	if (psi->gbCurrent[ch] > gb)
		psi->gbCurrent[ch] = gb;
	
	return 0;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * tns.c - apply TNS to spectrum
 **************************************************************************************/

//#include "coder.h"
////#include "assembly.h"

#define FBITS_LPC_COEFS	20

//fb
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnarrowing"

/* inverse quantization tables for TNS filter coefficients, format = Q31
 * see bottom of file for table generation
 * negative (vs. spec) since we use MADD for filter kernel
 */
static const int invQuant3[16] = {
	0x00000000, 0xc8767f65, 0x9becf22c, 0x83358feb, 0x83358feb, 0x9becf22c, 0xc8767f65, 0x00000000,
	0x2bc750e9, 0x5246dd49, 0x6ed9eba1, 0x7e0e2e32, 0x7e0e2e32, 0x6ed9eba1, 0x5246dd49, 0x2bc750e9,
};

static const int invQuant4[16] = {
	0x00000000, 0xe5632654, 0xcbf00dbe, 0xb4c373ee, 0xa0e0a15f, 0x9126145f, 0x8643c7b3, 0x80b381ac,
	0x7f7437ad, 0x7b1d1a49, 0x7294b5f2, 0x66256db2, 0x563ba8aa, 0x4362210e, 0x2e3d2abb, 0x17851aad,
};

#pragma GCC diagnostic pop

/**************************************************************************************
 * Function:    DecodeLPCCoefs
 *
 * Description: decode LPC coefficients for TNS
 *
 * Inputs:      order of TNS filter
 *              resolution of coefficients (3 or 4 bits)
 *              coefficients unpacked from bitstream
 *              scratch buffer (b) of size >= order
 *
 * Outputs:     LPC coefficients in Q(FBITS_LPC_COEFS), in 'a'
 *
 * Return:      none
 * 
 * Notes:       assumes no guard bits in input transform coefficients
 *              a[i] = Q(FBITS_LPC_COEFS), don't store a0 = 1.0 
 *                (so a[0] = first delay tap, etc.) 
 *              max abs(a[i]) < log2(order), so for max order = 20 a[i] < 4.4 
 *                (up to 3 bits of gain) so a[i] has at least 31 - FBITS_LPC_COEFS - 3 
 *                guard bits
 *              to ensure no intermediate overflow in all-pole filter, set 
 *                FBITS_LPC_COEFS such that number of guard bits >= log2(max order)
 **************************************************************************************/
static void DecodeLPCCoefs(int order, int res, signed char *filtCoef, int *a, int *b)
{
	int i, m, t;
	const int *invQuantTab;

	if (res == 3)			invQuantTab = invQuant3;
	else if (res == 4)		invQuantTab = invQuant4;
	else					return;

	for (m = 0; m < order; m++) {
		t = invQuantTab[filtCoef[m] & 0x0f];	/* t = Q31 */
		for (i = 0; i < m; i++)
			b[i] = a[i] - (MULSHIFT32(t, a[m-i-1]) << 1);
		for (i = 0; i < m; i++) 
			a[i] = b[i];
		a[m] = t >> (31 - FBITS_LPC_COEFS);
	}
}

/**************************************************************************************
 * Function:    FilterRegion
 *
 * Description: apply LPC filter to one region of coefficients
 *
 * Inputs:      number of transform coefficients in this region
 *              direction flag (forward = 1, backward = -1)
 *              order of filter
 *              'size' transform coefficients
 *              'order' LPC coefficients in Q(FBITS_LPC_COEFS)
 *              scratch buffer for history (must be >= order samples long)
 *
 * Outputs:     filtered transform coefficients
 *
 * Return:      guard bit mask (OR of abs value of all filtered transform coefs)
 * 
 * Notes:       assumes no guard bits in input transform coefficients
 *              gains 0 int bits
 *              history buffer does not need to be preserved between regions
 **************************************************************************************/
static int FilterRegion(int size, int dir, int order, int *audioCoef, int *a, int *hist)
{
	int i, j, y, hi32, inc, gbMask;
	U64 sum64;

	/* init history to 0 every time */
	for (i = 0; i < order; i++)
		hist[i] = 0;

	sum64.w64 = 0;     /* avoid warning */
	gbMask = 0;
	inc = (dir ? -1 : 1);
	do {
		/* sum64 = a0*y[n] = 1.0*y[n] */
		y = *audioCoef;
		sum64.r.hi32 = y >> (32 - FBITS_LPC_COEFS);
		sum64.r.lo32 = y << FBITS_LPC_COEFS;
		 
		/* sum64 += (a1*y[n-1] + a2*y[n-2] + ... + a[order-1]*y[n-(order-1)]) */
        for (j = order - 1; j > 0; j--) {
			sum64.w64 = MADD64(sum64.w64, hist[j], a[j]);
            hist[j] = hist[j-1];
		}
		sum64.w64 = MADD64(sum64.w64, hist[0], a[0]);
		y = (sum64.r.hi32 << (32 - FBITS_LPC_COEFS)) | (sum64.r.lo32 >> FBITS_LPC_COEFS);

		/* clip output (rare) */
		hi32 = sum64.r.hi32;
		if ((hi32 >> 31) != (hi32 >> (FBITS_LPC_COEFS-1)))
			y = (hi32 >> 31) ^ 0x7fffffff;

		hist[0] = y;
		*audioCoef = y;
		audioCoef += inc;
		gbMask |= FASTABS(y);
	} while (--size);

	return gbMask;
}

/**************************************************************************************
 * Function:    TNSFilter
 *
 * Description: apply temporal noise shaping, if enabled
 *
 * Inputs:      valid AACDecInfo struct
 *              index of current channel
 *
 * Outputs:     updated transform coefficients
 *              updated minimum guard bit count for this channel
 *
 * Return:      0 if successful, -1 if error
 **************************************************************************************/
int TNSFilter(AACDecInfo *aacDecInfo, int ch)
{
	int win, winLen, nWindows, nSFB, filt, bottom, top, order, maxOrder, dir;
	int start, end, size, tnsMaxBand, numFilt, gbMask;
	int *audioCoef;
	unsigned char *filtLength, *filtOrder, *filtRes, *filtDir; 
	signed char *filtCoef;
	const unsigned char *tnsMaxBandTab;
	const short *sfbTab;
	ICSInfo *icsInfo;
	TNSInfo *ti;
	PSInfoBase *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);
	ti = &psi->tnsInfo[ch];

	if (!ti->tnsDataPresent)
		return 0;

	if (icsInfo->winSequence == 2) {
		nWindows = NWINDOWS_SHORT;
		winLen = NSAMPS_SHORT;
		nSFB = sfBandTotalShort[psi->sampRateIdx];
		maxOrder = tnsMaxOrderShort[aacDecInfo->profile];
		sfbTab = sfBandTabShort + sfBandTabShortOffset[psi->sampRateIdx];
		tnsMaxBandTab = tnsMaxBandsShort + tnsMaxBandsShortOffset[aacDecInfo->profile];
		tnsMaxBand = tnsMaxBandTab[psi->sampRateIdx];
	} else {
		nWindows = NWINDOWS_LONG;
		winLen = NSAMPS_LONG;
		nSFB = sfBandTotalLong[psi->sampRateIdx];
		maxOrder = tnsMaxOrderLong[aacDecInfo->profile];
		sfbTab = sfBandTabLong + sfBandTabLongOffset[psi->sampRateIdx];
		tnsMaxBandTab = tnsMaxBandsLong + tnsMaxBandsLongOffset[aacDecInfo->profile];
		tnsMaxBand = tnsMaxBandTab[psi->sampRateIdx];
	}

	if (tnsMaxBand > icsInfo->maxSFB)
		tnsMaxBand = icsInfo->maxSFB;

	filtRes =    ti->coefRes;
	filtLength = ti->length;
	filtOrder =  ti->order;
	filtDir =    ti->dir;
	filtCoef =   ti->coef;

	gbMask = 0;
	audioCoef =  psi->coef[ch];
	for (win = 0; win < nWindows; win++) {
		bottom = nSFB;
		numFilt = ti->numFilt[win];
		for (filt = 0; filt < numFilt; filt++) {
			top = bottom;
			bottom = top - *filtLength++;
			bottom = MAX(bottom, 0);
			order = *filtOrder++;
			order = MIN(order, maxOrder);

			if (order) {
				start = sfbTab[MIN(bottom, tnsMaxBand)];
				end   = sfbTab[MIN(top, tnsMaxBand)];
				size = end - start;
				if (size > 0) {
					dir = *filtDir++;
					if (dir)
						start = end - 1;

					DecodeLPCCoefs(order, filtRes[win], filtCoef, psi->tnsLPCBuf, psi->tnsWorkBuf);
					gbMask |= FilterRegion(size, dir, order, audioCoef + start, psi->tnsLPCBuf, psi->tnsWorkBuf);
				}
				filtCoef += order;
			}
		}
		audioCoef += winLen;
	}

	/* update guard bit count if necessary */
	size = CLZ(gbMask) - 1;
	if (psi->gbCurrent[ch] > size)
		psi->gbCurrent[ch] = size;

	return 0;
}

/*	Code to generate invQuantXXX[] tables
 *  {
 *    int res, i, t;
 *    double powScale, iqfac, iqfac_m, d;
 *
 *    powScale = pow(2.0, 31) * -1.0;	/ ** make coefficients negative for using MADD in kernel ** /
 *    for (res = 3; res <= 4; res++) {
 *      iqfac =   ( ((1 << (res-1)) - 0.5) * (2.0 / M_PI) );
 *      iqfac_m = ( ((1 << (res-1)) + 0.5) * (2.0 / M_PI) );
 *      printf("static const int invQuant%d[16] = {\n", res);
 *      for (i = 0; i < 16; i++) {
 *        / ** extend bottom 4 bits into signed, 2's complement number ** /
 *        t = (i << 28) >> 28;
 *
 *        if (t >= 0)   d = sin(t / iqfac);
 *        else          d = sin(t / iqfac_m);
 *
 *        d *= powScale;
 *        printf("0x%08x, ", (int)(d > 0 ? d + 0.5 : d - 0.5));
 *        if ((i & 0x07) == 0x07)
 *           printf("\n");
 *      }
 *      printf("};\n\n");
 *	  }
 *  }
 */



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * decelmnt.c - syntactic element decoding
 **************************************************************************************/

//#include "coder.h"

/**************************************************************************************
 * Function:    DecodeSingleChannelElement
 *
 * Description: decode one SCE
 *
 * Inputs:      BitStreamInfo struct pointing to start of SCE (14496-3, table 4.4.4) 
 *
 * Outputs:     updated element instance tag
 *
 * Return:      0 if successful, -1 if error
 *
 * Notes:       doesn't decode individual channel stream (part of DecodeNoiselessData)
 **************************************************************************************/
static int DecodeSingleChannelElement(AACDecInfo *aacDecInfo, BitStreamInfo *bsi)
{
	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;

	/* read instance tag */
	aacDecInfo->currInstTag = GetBits(bsi, NUM_INST_TAG_BITS);

	return 0;
}

/**************************************************************************************
 * Function:    DecodeChannelPairElement
 *
 * Description: decode one CPE
 *
 * Inputs:      BitStreamInfo struct pointing to start of CPE (14496-3, table 4.4.5) 
 *
 * Outputs:     updated element instance tag
 *              updated commonWin
 *              updated ICS info, if commonWin == 1
 *              updated mid-side stereo info, if commonWin == 1
 *
 * Return:      0 if successful, -1 if error
 *
 * Notes:       doesn't decode individual channel stream (part of DecodeNoiselessData)
 **************************************************************************************/
static int DecodeChannelPairElement(AACDecInfo *aacDecInfo, BitStreamInfo *bsi)
{
	int sfb, gp, maskOffset;
	unsigned char currBit, *maskPtr;
	PSInfoBase *psi;
	ICSInfo *icsInfo;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	icsInfo = psi->icsInfo;

	/* read instance tag */
	aacDecInfo->currInstTag = GetBits(bsi, NUM_INST_TAG_BITS);

	/* read common window flag and mid-side info (if present) 
	 * store msMask bits in psi->msMaskBits[] as follows:
	 *  long blocks -  pack bits for each SFB in range [0, maxSFB) starting with lsb of msMaskBits[0]
	 *  short blocks - pack bits for each SFB in range [0, maxSFB), for each group [0, 7]
	 * msMaskPresent = 0 means no M/S coding
	 *               = 1 means psi->msMaskBits contains 1 bit per SFB to toggle M/S coding
	 *               = 2 means all SFB's are M/S coded (so psi->msMaskBits is not needed)
	 */
	psi->commonWin = GetBits(bsi, 1);
	if (psi->commonWin) {
		DecodeICSInfo(bsi, icsInfo, psi->sampRateIdx);
		psi->msMaskPresent = GetBits(bsi, 2);
		if (psi->msMaskPresent == 1) {
			maskPtr = psi->msMaskBits;
			*maskPtr = 0;
			maskOffset = 0;
			for (gp = 0; gp < icsInfo->numWinGroup; gp++) {
				for (sfb = 0; sfb < icsInfo->maxSFB; sfb++) {
					currBit = (unsigned char)GetBits(bsi, 1);
					*maskPtr |= currBit << maskOffset;
					if (++maskOffset == 8) {
						maskPtr++;
						*maskPtr = 0;
						maskOffset = 0;
					}
				}		
			}
		}
	}

	return 0;
}

/**************************************************************************************
 * Function:    DecodeLFEChannelElement
 *
 * Description: decode one LFE
 *
 * Inputs:      BitStreamInfo struct pointing to start of LFE (14496-3, table 4.4.9) 
 *
 * Outputs:     updated element instance tag
 *
 * Return:      0 if successful, -1 if error
 *
 * Notes:       doesn't decode individual channel stream (part of DecodeNoiselessData)
 **************************************************************************************/
static int DecodeLFEChannelElement(AACDecInfo *aacDecInfo, BitStreamInfo *bsi)
{
	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;

	/* read instance tag */
	aacDecInfo->currInstTag = GetBits(bsi, NUM_INST_TAG_BITS);

	return 0;
}

/**************************************************************************************
 * Function:    DecodeDataStreamElement
 *
 * Description: decode one DSE
 *
 * Inputs:      BitStreamInfo struct pointing to start of DSE (14496-3, table 4.4.10) 
 *
 * Outputs:     updated element instance tag
 *              filled in data stream buffer
 *
 * Return:      0 if successful, -1 if error
 **************************************************************************************/
static int DecodeDataStreamElement(AACDecInfo *aacDecInfo, BitStreamInfo *bsi)
{
	unsigned int byteAlign, dataCount;
	unsigned char *dataBuf;
	PSInfoBase *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	aacDecInfo->currInstTag = GetBits(bsi, NUM_INST_TAG_BITS);
	byteAlign = GetBits(bsi, 1);
	dataCount = GetBits(bsi, 8);
	if (dataCount == 255)
		dataCount += GetBits(bsi, 8);

	if (byteAlign)
		ByteAlignBitstream(bsi);

	psi->dataCount = dataCount;
	dataBuf = psi->dataBuf;
	while (dataCount--)
		*dataBuf++ = GetBits(bsi, 8);

	return 0;
}

/**************************************************************************************
 * Function:    DecodeProgramConfigElement
 *
 * Description: decode one PCE
 *
 * Inputs:      BitStreamInfo struct pointing to start of PCE (14496-3, table 4.4.2) 
 *
 * Outputs:     filled-in ProgConfigElement struct
 *              updated BitStreamInfo struct
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       #define KEEP_PCE_COMMENTS to save the comment field of the PCE
 *                (otherwise we just skip it in the bitstream, to save memory)
 **************************************************************************************/
int DecodeProgramConfigElement(ProgConfigElement *pce, BitStreamInfo *bsi)
{
	int i;

	pce->elemInstTag =   GetBits(bsi, 4);
	pce->profile =       GetBits(bsi, 2);
	pce->sampRateIdx =   GetBits(bsi, 4);
	pce->numFCE =        GetBits(bsi, 4);
	pce->numSCE =        GetBits(bsi, 4);
	pce->numBCE =        GetBits(bsi, 4);
	pce->numLCE =        GetBits(bsi, 2);
	pce->numADE =        GetBits(bsi, 3);
	pce->numCCE =        GetBits(bsi, 4);

	pce->monoMixdown = GetBits(bsi, 1) << 4;	/* present flag */
	if (pce->monoMixdown)
		pce->monoMixdown |= GetBits(bsi, 4);	/* element number */

	pce->stereoMixdown = GetBits(bsi, 1) << 4;	/* present flag */
	if (pce->stereoMixdown)
		pce->stereoMixdown  |= GetBits(bsi, 4);	/* element number */

	pce->matrixMixdown = GetBits(bsi, 1) << 4;	/* present flag */
	if (pce->matrixMixdown) {
		pce->matrixMixdown  |= GetBits(bsi, 2) << 1;	/* index */
		pce->matrixMixdown  |= GetBits(bsi, 1);			/* pseudo-surround enable */
	}

	for (i = 0; i < pce->numFCE; i++) {
		pce->fce[i]  = GetBits(bsi, 1) << 4;	/* is_cpe flag */
		pce->fce[i] |= GetBits(bsi, 4);			/* tag select */
	}

	for (i = 0; i < pce->numSCE; i++) {
		pce->sce[i]  = GetBits(bsi, 1) << 4;	/* is_cpe flag */
		pce->sce[i] |= GetBits(bsi, 4);			/* tag select */
	}

	for (i = 0; i < pce->numBCE; i++) {
		pce->bce[i]  = GetBits(bsi, 1) << 4;	/* is_cpe flag */
		pce->bce[i] |= GetBits(bsi, 4);			/* tag select */
	}

	for (i = 0; i < pce->numLCE; i++)
		pce->lce[i] = GetBits(bsi, 4);			/* tag select */

	for (i = 0; i < pce->numADE; i++)
		pce->ade[i] = GetBits(bsi, 4);			/* tag select */

	for (i = 0; i < pce->numCCE; i++) {
		pce->cce[i]  = GetBits(bsi, 1) << 4;	/* independent/dependent flag */
		pce->cce[i] |= GetBits(bsi, 4);			/* tag select */
	}


	ByteAlignBitstream(bsi);

#ifdef KEEP_PCE_COMMENTS
	pce->commentBytes = GetBits(bsi, 8);
	for (i = 0; i < pce->commentBytes; i++)
		pce->commentField[i] = GetBits(bsi, 8);
#else
	/* eat comment bytes and throw away */
	i = GetBits(bsi, 8);
	while (i--)
		GetBits(bsi, 8);
#endif

	return 0;
}

/**************************************************************************************
 * Function:    DecodeFillElement
 *
 * Description: decode one fill element
 *
 * Inputs:      BitStreamInfo struct pointing to start of fill element
 *                (14496-3, table 4.4.11) 
 *
 * Outputs:     updated element instance tag
 *              unpacked extension payload
 *
 * Return:      0 if successful, -1 if error
 **************************************************************************************/
static int DecodeFillElement(AACDecInfo *aacDecInfo, BitStreamInfo *bsi)
{
	unsigned int fillCount;
	unsigned char *fillBuf;
	PSInfoBase *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	fillCount = GetBits(bsi, 4);
	if (fillCount == 15)
		fillCount += (GetBits(bsi, 8) - 1);

	psi->fillCount = fillCount;
	fillBuf = psi->fillBuf;
	while (fillCount--)
		*fillBuf++ = GetBits(bsi, 8);

	aacDecInfo->currInstTag = -1;	/* fill elements don't have instance tag */
	aacDecInfo->fillExtType = 0;

#ifdef AAC_ENABLE_SBR
	/* check for SBR 
	 * aacDecInfo->sbrEnabled is sticky (reset each raw_data_block), so for multichannel 
	 *    need to verify that all SCE/CPE/ICCE have valid SBR fill element following, and 
	 *    must upsample by 2 for LFE
	 */
	if (psi->fillCount > 0) {
		aacDecInfo->fillExtType = (int)((psi->fillBuf[0] >> 4) & 0x0f);
		if (aacDecInfo->fillExtType == EXT_SBR_DATA || aacDecInfo->fillExtType == EXT_SBR_DATA_CRC)
			aacDecInfo->sbrEnabled = 1;
	}
#endif

	aacDecInfo->fillBuf = psi->fillBuf;
	aacDecInfo->fillCount = psi->fillCount;

	return 0;
}

/**************************************************************************************
 * Function:    DecodeNextElement
 *
 * Description: decode next syntactic element in AAC frame
 *
 * Inputs:      valid AACDecInfo struct
 *              double pointer to buffer containing next element
 *              pointer to bit offset
 *              pointer to number of valid bits remaining in buf
 *
 * Outputs:     type of element decoded (aacDecInfo->currBlockID)
 *              type of element decoded last time (aacDecInfo->prevBlockID)
 *              updated aacDecInfo state, depending on which element was decoded
 *              updated buffer pointer
 *              updated bit offset
 *              updated number of available bits
 *
 * Return:      0 if successful, error code (< 0) if error
 **************************************************************************************/
int DecodeNextElement(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail)
{
	int err, bitsUsed;
	PSInfoBase *psi;
	BitStreamInfo bsi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	/* init bitstream reader */
	SetBitstreamPointer(&bsi, (*bitsAvail + 7) >> 3, *buf);
	GetBits(&bsi, *bitOffset);

	/* read element ID (save last ID for SBR purposes) */
	aacDecInfo->prevBlockID = aacDecInfo->currBlockID;
	aacDecInfo->currBlockID = GetBits(&bsi, NUM_SYN_ID_BITS);

	/* set defaults (could be overwritten by DecodeXXXElement(), depending on currBlockID) */
	psi->commonWin = 0;
 
	err = 0;
	switch (aacDecInfo->currBlockID) {
	case AAC_ID_SCE:
		err = DecodeSingleChannelElement(aacDecInfo, &bsi);
		break;
	case AAC_ID_CPE:
		err = DecodeChannelPairElement(aacDecInfo, &bsi);
		break;
	case AAC_ID_CCE:
		/* TODO - implement CCE decoding */
		break;
	case AAC_ID_LFE:
		err = DecodeLFEChannelElement(aacDecInfo, &bsi);
		break;
	case AAC_ID_DSE:
		err = DecodeDataStreamElement(aacDecInfo, &bsi);
		break;
	case AAC_ID_PCE:
		err = DecodeProgramConfigElement(psi->pce + 0, &bsi);
		break;
	case AAC_ID_FIL:
		err = DecodeFillElement(aacDecInfo, &bsi);
		break;
	case AAC_ID_END:
		break;
	}
	if (err)
		return ERR_AAC_SYNTAX_ELEMENT;

	/* update bitstream reader */
	bitsUsed = CalcBitsUsed(&bsi, *buf, *bitOffset);
	*buf += (bitsUsed + *bitOffset) >> 3;
	*bitOffset = (bitsUsed + *bitOffset) & 0x07;
	*bitsAvail -= bitsUsed;

	if (*bitsAvail < 0)
		return ERR_AAC_INDATA_UNDERFLOW;

	return ERR_AAC_NONE;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * February 2005
 *
 * dequant.c - transform coefficient dequantization and short-block deinterleaving
 **************************************************************************************/

//#include "coder.h"
////#include "assembly.h"

#define	SF_OFFSET			100

/* pow(2, i/4.0) for i = [0,1,2,3], format = Q30 */
static const int pow14[4] = { 
	0x40000000, 0x4c1bf829, 0x5a82799a, 0x6ba27e65
};

/* pow(2, i/4.0) * pow(j, 4.0/3.0) for i = [0,1,2,3],  j = [0,1,2,...,15]
 * format = Q28 for j = [0-3], Q25 for j = [4-15]
 */
static const int pow43_14[4][16] = {
	{
	0x00000000, 0x10000000, 0x285145f3, 0x453a5cdb, /* Q28 */
	0x0cb2ff53, 0x111989d6, 0x15ce31c8, 0x1ac7f203, /* Q25 */
	0x20000000, 0x257106b9, 0x2b16b4a3, 0x30ed74b4, /* Q25 */
	0x36f23fa5, 0x3d227bd3, 0x437be656, 0x49fc823c, /* Q25 */
	},
	{
	0x00000000, 0x1306fe0a, 0x2ff221af, 0x52538f52, 
	0x0f1a1bf4, 0x1455ccc2, 0x19ee62a8, 0x1fd92396, 
	0x260dfc14, 0x2c8694d8, 0x333dcb29, 0x3a2f5c7a, 
	0x4157aed5, 0x48b3aaa3, 0x50409f76, 0x57fc3010, 
	},
	{
	0x00000000, 0x16a09e66, 0x39047c0f, 0x61e734aa, 
	0x11f59ac4, 0x182ec633, 0x1ed66a45, 0x25dfc55a, 
	0x2d413ccd, 0x34f3462d, 0x3cefc603, 0x4531ab69, 
	0x4db4adf8, 0x56752054, 0x5f6fcfcd, 0x68a1eca1, 
	},
	{
	0x00000000, 0x1ae89f99, 0x43ce3e4b, 0x746d57b2, 
	0x155b8109, 0x1cc21cdc, 0x24ac1839, 0x2d0a479e, 
	0x35d13f33, 0x3ef80748, 0x48775c93, 0x524938cd, 
	0x5c68841d, 0x66d0df0a, 0x717e7bfe, 0x7c6e0305, 
	},
};

/* pow(j, 4.0 / 3.0) for j = [16,17,18,...,63], format = Q23 */
static const int pow43[48] = {
	0x1428a2fa, 0x15db1bd6, 0x1796302c, 0x19598d85, 
	0x1b24e8bb, 0x1cf7fcfa, 0x1ed28af2, 0x20b4582a, 
	0x229d2e6e, 0x248cdb55, 0x26832fda, 0x28800000, 
	0x2a832287, 0x2c8c70a8, 0x2e9bc5d8, 0x30b0ff99, 
	0x32cbfd4a, 0x34eca001, 0x3712ca62, 0x393e6088, 
	0x3b6f47e0, 0x3da56717, 0x3fe0a5fc, 0x4220ed72, 
	0x44662758, 0x46b03e7c, 0x48ff1e87, 0x4b52b3f3, 
	0x4daaebfd, 0x5007b497, 0x5268fc62, 0x54ceb29c, 
	0x5738c721, 0x59a72a59, 0x5c19cd35, 0x5e90a129, 
	0x610b9821, 0x638aa47f, 0x660db90f, 0x6894c90b, 
	0x6b1fc80c, 0x6daeaa0d, 0x70416360, 0x72d7e8b0, 
	0x75722ef9, 0x78102b85, 0x7ab1d3ec, 0x7d571e09, 
};

/* sqrt(0.5), format = Q31 */
#define SQRTHALF 0x5a82799a

/* Minimax polynomial approximation to pow(x, 4/3), over the range
 *  poly43lo: x = [0.5, 0.7071]
 *  poly43hi: x = [0.7071, 1.0]
 *
 * Relative error < 1E-7
 * Coefs are scaled by 4, 2, 1, 0.5, 0.25
 */
 
//fb
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnarrowing"
static const int poly43lo[5] = { 0x29a0bda9, 0xb02e4828, 0x5957aa1b, 0x236c498d, 0xff581859 };
static const int poly43hi[5] = { 0x10852163, 0xd333f6a4, 0x46e9408b, 0x27c2cef0, 0xfef577b4 };
#pragma GCC diagnostic pop

/* pow2exp[i] = pow(2, i*4/3) exponent */
static const int pow2exp[8]  = { 14, 13, 11, 10, 9, 7, 6, 5 };

/* pow2exp[i] = pow(2, i*4/3) fraction */
static const int pow2frac[8] = {
	0x6597fa94, 0x50a28be6, 0x7fffffff, 0x6597fa94, 
	0x50a28be6, 0x7fffffff, 0x6597fa94, 0x50a28be6
};

/**************************************************************************************
 * Function:    DequantBlock
 *
 * Description: dequantize one block of transform coefficients (in-place)
 *
 * Inputs:      quantized transform coefficients, range = [0, 8191]
 *              number of samples to dequantize
 *              scalefactor for this block of data, range = [0, 256]
 *
 * Outputs:     dequantized transform coefficients in Q(FBITS_OUT_DQ_OFF)
 *
 * Return:      guard bit mask (OR of abs value of all dequantized coefs)
 *
 * Notes:       applies dequant formula y = pow(x, 4.0/3.0) * pow(2, (scale - 100)/4.0)
 *                * pow(2, FBITS_OUT_DQ_OFF)
 *              clips outputs to Q(FBITS_OUT_DQ_OFF)
 *              output has no minimum number of guard bits
 **************************************************************************************/
static int DequantBlock(int *inbuf, int nSamps, int scale)
{
	int iSamp, scalef, scalei, x, y, gbMask, shift, tab4[4];
	const int *tab16, *coef;

	if (nSamps <= 0)
		return 0;

	scale -= SF_OFFSET;	/* new range = [-100, 156] */

	/* with two's complement numbers, scalei/scalef factorization works for pos and neg values of scale:
	 *  [+4...+7] >> 2 = +1, [ 0...+3] >> 2 = 0, [-4...-1] >> 2 = -1, [-8...-5] >> 2 = -2 ...
	 *  (-1 & 0x3) = 3, (-2 & 0x3) = 2, (-3 & 0x3) = 1, (0 & 0x3) = 0
	 *
	 * Example: 2^(-5/4) = 2^(-1) * 2^(-1/4) = 2^-2 * 2^(3/4)
	 */
	tab16 = pow43_14[scale & 0x3];
	scalef = pow14[scale & 0x3];
	scalei = (scale >> 2) + FBITS_OUT_DQ_OFF;

	/* cache first 4 values:
	 * tab16[j] = Q28 for j = [0,3]
	 * tab4[x] = x^(4.0/3.0) * 2^(0.25*scale), Q(FBITS_OUT_DQ_OFF)
	 */
	shift = 28 - scalei;	
	if (shift > 31) {
		tab4[0] = tab4[1] = tab4[2] = tab4[3] = 0;
	} else if (shift <= 0) {
		shift = -shift;
		if (shift > 31)
			shift = 31;
		for (x = 0; x < 4; x++) {
			y = tab16[x];
			if (y > (0x7fffffff >> shift))
				y = 0x7fffffff;		/* clip (rare) */
			else
				y <<= shift;
			tab4[x] = y;
		}
	} else {
		tab4[0] = 0;
		tab4[1] = tab16[1] >> shift;
		tab4[2] = tab16[2] >> shift;
		tab4[3] = tab16[3] >> shift;
	}

	gbMask = 0;
	do {
		iSamp = *inbuf;
		x = FASTABS(iSamp);

		if (x < 4) {
			y = tab4[x];
		} else  {

			if (x < 16) {
				/* result: y = Q25 (tab16 = Q25) */
				y = tab16[x];
				shift = 25 - scalei;
			} else if (x < 64) {
				/* result: y = Q21 (pow43tab[j] = Q23, scalef = Q30) */
				y = pow43[x-16];	
				shift = 21 - scalei;
				y = MULSHIFT32(y, scalef);
			} else {
				/* normalize to [0x40000000, 0x7fffffff]
				 * input x = [64, 8191] = [64, 2^13-1]
				 * ranges:
				 *  shift = 7:   64 -  127
				 *  shift = 6:  128 -  255
				 *  shift = 5:  256 -  511
				 *  shift = 4:  512 - 1023
				 *  shift = 3: 1024 - 2047
				 *  shift = 2: 2048 - 4095
				 *  shift = 1: 4096 - 8191
				 */
				x <<= 17;
				shift = 0;
				if (x < 0x08000000)
					x <<= 4, shift += 4;
				if (x < 0x20000000)
					x <<= 2, shift += 2;
				if (x < 0x40000000)
					x <<= 1, shift += 1;

				coef = (x < SQRTHALF) ? poly43lo : poly43hi;

				/* polynomial */
				y = coef[0];
				y = MULSHIFT32(y, x) + coef[1];
				y = MULSHIFT32(y, x) + coef[2];
				y = MULSHIFT32(y, x) + coef[3];
				y = MULSHIFT32(y, x) + coef[4];
				y = MULSHIFT32(y, pow2frac[shift]) << 3;

				/* fractional scale 
				 * result: y = Q21 (pow43tab[j] = Q23, scalef = Q30)
				 */
				y = MULSHIFT32(y, scalef);	/* now y is Q24 */
				shift = 24 - scalei - pow2exp[shift];
			}

			/* integer scale */
			if (shift <= 0) {
				shift = -shift;
				if (shift > 31)
					shift = 31;

				if (y > (0x7fffffff >> shift))
					y = 0x7fffffff;		/* clip (rare) */
				else
					y <<= shift;
			} else {
				if (shift > 31)
					shift = 31;
				y >>= shift;
			}
		}

		/* sign and store (gbMask used to count GB's) */
		gbMask |= y;

		/* apply sign */
		iSamp >>= 31;
		y ^= iSamp;
		y -= iSamp;

		*inbuf++ = y;
	} while (--nSamps);

	return gbMask;
}

/**************************************************************************************
 * Function:    Dequantize
 *
 * Description: dequantize all transform coefficients for one channel
 *
 * Inputs:      valid AACDecInfo struct (including unpacked, quantized coefficients)
 *              index of current channel
 *
 * Outputs:     dequantized coefficients, including short-block deinterleaving
 *              flags indicating if intensity and/or PNS is active
 *              minimum guard bit count for dequantized coefficients
 *
 * Return:      0 if successful, error code (< 0) if error
 **************************************************************************************/
int Dequantize(AACDecInfo *aacDecInfo, int ch)
{
	int gp, cb, sfb, win, width, nSamps, gbMask;
	int *coef;
	const short *sfbTab;
	unsigned char *sfbCodeBook;
	short *scaleFactors;
	PSInfoBase *psi;
	ICSInfo *icsInfo;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);
		
	if (icsInfo->winSequence == 2) {
		sfbTab = sfBandTabShort + sfBandTabShortOffset[psi->sampRateIdx];
		nSamps = NSAMPS_SHORT;
	} else {
		sfbTab = sfBandTabLong + sfBandTabLongOffset[psi->sampRateIdx];
		nSamps = NSAMPS_LONG;
	}
	coef = psi->coef[ch];
	sfbCodeBook = psi->sfbCodeBook[ch];
	scaleFactors = psi->scaleFactors[ch];

	psi->intensityUsed[ch] = 0;
	psi->pnsUsed[ch] = 0;
	gbMask = 0;
	for (gp = 0; gp < icsInfo->numWinGroup; gp++) {
		for (win = 0; win < icsInfo->winGroupLen[gp]; win++) {
			for (sfb = 0; sfb < icsInfo->maxSFB; sfb++) {
				/* dequantize one scalefactor band (not necessary if codebook is intensity or PNS) 
				 * for zero codebook, still run dequantizer in case non-zero pulse data was added
				 */
				cb = (int)(sfbCodeBook[sfb]);
				width = sfbTab[sfb+1] - sfbTab[sfb];
				if (cb >= 0 && cb <= 11)
					gbMask |= DequantBlock(coef, width, scaleFactors[sfb]);
				else if (cb == 13)
					psi->pnsUsed[ch] = 1;
				else if (cb == 14 || cb == 15)
					psi->intensityUsed[ch] = 1;	/* should only happen if ch == 1 */
				coef += width;
			}
			coef += (nSamps - sfbTab[icsInfo->maxSFB]);
		}
		sfbCodeBook += icsInfo->maxSFB;
		scaleFactors += icsInfo->maxSFB;
	}
	aacDecInfo->pnsUsed |= psi->pnsUsed[ch];	/* set flag if PNS used for any channel */

	/* calculate number of guard bits in dequantized data */
	psi->gbCurrent[ch] = CLZ(gbMask) - 1;

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    DeinterleaveShortBlocks
 *
 * Description: deinterleave transform coefficients in short blocks for one channel
 *
 * Inputs:      valid AACDecInfo struct (including unpacked, quantized coefficients)
 *              index of current channel
 *
 * Outputs:     deinterleaved coefficients (window groups into 8 separate windows)
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       only necessary if deinterleaving not part of Huffman decoding
 **************************************************************************************/
int DeinterleaveShortBlocks(AACDecInfo *aacDecInfo, int ch)
{
	/* not used for this implementation - short block deinterleaving performed during Huffman decoding */
	return ERR_AAC_NONE;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * noiseless.c - decode channel info, scalefactors, quantized coefficients, 
 *                 scalefactor band codebook, and TNS coefficients from bitstream
 **************************************************************************************/

//#include "coder.h"

////#include "profile.h"

//#define PROFILE_START(x)
//#define PROFILE_END()

/**************************************************************************************
 * Function:    DecodeICSInfo
 *
 * Description: decode individual channel stream info
 *
 * Inputs:      BitStreamInfo struct pointing to start of ICS info
 *                (14496-3, table 4.4.6) 
 *              sample rate index
 *
 * Outputs:     updated icsInfo struct
 *
 * Return:      none
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ void DecodeICSInfo(BitStreamInfo *bsi, ICSInfo *icsInfo, int sampRateIdx)
{
	int sfb, g, mask;

	icsInfo->icsResBit =      GetBits(bsi, 1);
	icsInfo->winSequence =    GetBits(bsi, 2);
	icsInfo->winShape =       GetBits(bsi, 1);
	if (icsInfo->winSequence == 2) {
		/* short block */
		icsInfo->maxSFB =     GetBits(bsi, 4);
		icsInfo->sfGroup =    GetBits(bsi, 7);
		icsInfo->numWinGroup =    1;
		icsInfo->winGroupLen[0] = 1;
		mask = 0x40;	/* start with bit 6 */
		for (g = 0; g < 7; g++) {
			if (icsInfo->sfGroup & mask)	{ 
				icsInfo->winGroupLen[icsInfo->numWinGroup - 1]++;
			} else { 
				icsInfo->numWinGroup++; 
				icsInfo->winGroupLen[icsInfo->numWinGroup - 1] = 1; 
			}
			mask >>= 1;
		}
	} else {
		/* long block */
		icsInfo->maxSFB =               GetBits(bsi, 6);
		icsInfo->predictorDataPresent = GetBits(bsi, 1);
		if (icsInfo->predictorDataPresent) {
			icsInfo->predictorReset =   GetBits(bsi, 1);
			if (icsInfo->predictorReset)
				icsInfo->predictorResetGroupNum = GetBits(bsi, 5);
			for (sfb = 0; sfb < MIN(icsInfo->maxSFB, predSFBMax[sampRateIdx]); sfb++)
				icsInfo->predictionUsed[sfb] = GetBits(bsi, 1);
		}
		icsInfo->numWinGroup = 1;
		icsInfo->winGroupLen[0] = 1;
	}
}

/**************************************************************************************
 * Function:    DecodeSectionData
 *
 * Description: decode section data (scale factor band groupings and 
 *                associated Huffman codebooks)
 *
 * Inputs:      BitStreamInfo struct pointing to start of ICS info
 *                (14496-3, table 4.4.25)
 *              window sequence (short or long blocks)
 *              number of window groups (1 for long blocks, 1-8 for short blocks)
 *              max coded scalefactor band
 *
 * Outputs:     index of Huffman codebook for each scalefactor band in each section
 *
 * Return:      none
 *
 * Notes:       sectCB, sectEnd, sfbCodeBook, ordered by window groups for short blocks
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ static void DecodeSectionData(BitStreamInfo *bsi, int winSequence, int numWinGrp, int maxSFB, unsigned char *sfbCodeBook)
{
	int g, cb, sfb;
	int sectLen, sectLenBits, sectLenIncr, sectEscapeVal;

	sectLenBits = (winSequence == 2 ? 3 : 5);
	sectEscapeVal = (1 << sectLenBits) - 1;

	for (g = 0; g < numWinGrp; g++) {
		sfb = 0;
		while (sfb < maxSFB) {
			cb = GetBits(bsi, 4);	/* next section codebook */
			sectLen = 0;
			do {
				sectLenIncr = GetBits(bsi, sectLenBits);
				sectLen += sectLenIncr;
			} while (sectLenIncr == sectEscapeVal);

			sfb += sectLen;
			while (sectLen--)
				*sfbCodeBook++ = (unsigned char)cb;
		}
		ASSERT(sfb == maxSFB);
	}
}

/**************************************************************************************
 * Function:    DecodeOneScaleFactor
 *
 * Description: decode one scalefactor using scalefactor Huffman codebook
 *
 * Inputs:      BitStreamInfo struct pointing to start of next coded scalefactor
 *
 * Outputs:     updated BitstreamInfo struct
 *
 * Return:      one decoded scalefactor, including index_offset of -60
 **************************************************************************************/
static int DecodeOneScaleFactor(BitStreamInfo *bsi)
{
	int nBits, val;
	unsigned int bitBuf;

	/* decode next scalefactor from bitstream */
	bitBuf = GetBitsNoAdvance(bsi, huffTabScaleFactInfo.maxBits) << (32 - huffTabScaleFactInfo.maxBits);
  //PROFILE_START("DecodeHuffmanScalar");
	nBits = DecodeHuffmanScalar(huffTabScaleFact, &huffTabScaleFactInfo, bitBuf, &val);
	AdvanceBitstream(bsi, nBits);
  //PROFILE_END();
	return val;
}

/**************************************************************************************
 * Function:    DecodeScaleFactors
 *
 * Description: decode scalefactors, PNS energy, and intensity stereo weights
 *
 * Inputs:      BitStreamInfo struct pointing to start of ICS info
 *                (14496-3, table 4.4.26)
 *              number of window groups (1 for long blocks, 1-8 for short blocks)
 *              max coded scalefactor band
 *              global gain (starting value for differential scalefactor coding)
 *              index of Huffman codebook for each scalefactor band in each section
 *
 * Outputs:     decoded scalefactor for each section
 *
 * Return:      none
 *
 * Notes:       sfbCodeBook, scaleFactors ordered by window groups for short blocks
 *              for section with codebook 13, scaleFactors buffer has decoded PNS
 *                energy instead of regular scalefactor
 *              for section with codebook 14 or 15, scaleFactors buffer has intensity
 *                stereo weight instead of regular scalefactor
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ static void DecodeScaleFactors(BitStreamInfo *bsi, int numWinGrp, int maxSFB, int globalGain,
								  unsigned char *sfbCodeBook, short *scaleFactors)
{
	int g, sfbCB, nrg, npf, val, sf, is;

	/* starting values for differential coding */
	sf = globalGain;
	is = 0;
	nrg = globalGain - 90 - 256;
	npf = 1;

	for (g = 0; g < numWinGrp * maxSFB; g++) {
		sfbCB = *sfbCodeBook++;

		if (sfbCB  == 14 || sfbCB == 15) {
			/* intensity stereo - differential coding */
			val = DecodeOneScaleFactor(bsi);
			is += val;
			*scaleFactors++ = (short)is;
		} else if (sfbCB == 13) {
			/* PNS - first energy is directly coded, rest are Huffman coded (npf = noise_pcm_flag) */ 
			if (npf) {
				val = GetBits(bsi, 9);
				npf = 0;
			} else {
				val = DecodeOneScaleFactor(bsi);
			}
			nrg += val;
			*scaleFactors++ = (short)nrg;
		} else if (sfbCB >= 1 && sfbCB <= 11) {
			/* regular (non-zero) region - differential coding */
			val = DecodeOneScaleFactor(bsi);
			sf += val;
			*scaleFactors++ = (short)sf;
		} else {
			/* inactive scalefactor band if codebook 0 */
			*scaleFactors++ = 0;
		}
	}
}

/**************************************************************************************
 * Function:    DecodePulseInfo
 *
 * Description: decode pulse information
 *
 * Inputs:      BitStreamInfo struct pointing to start of pulse info
 *                (14496-3, table 4.4.7)
 *
 * Outputs:     updated PulseInfo struct
 *
 * Return:      none
 **************************************************************************************/
/* __attribute__ ((section (".data"))) */ static void DecodePulseInfo(BitStreamInfo *bsi, PulseInfo *pi)
{
	int i;

	pi->numPulse = GetBits(bsi, 2) + 1;		/* add 1 here */
	pi->startSFB = GetBits(bsi, 6);
	for (i = 0; i < pi->numPulse; i++) {
		pi->offset[i] = GetBits(bsi, 5);
		pi->amp[i] = GetBits(bsi, 4);
	}
}

/**************************************************************************************
 * Function:    DecodeTNSInfo
 *
 * Description: decode TNS filter information
 *
 * Inputs:      BitStreamInfo struct pointing to start of TNS info
 *                (14496-3, table 4.4.27)
 *              window sequence (short or long blocks)
 *
 * Outputs:     updated TNSInfo struct
 *              buffer of decoded (signed) TNS filter coefficients
 *
 * Return:      none
 **************************************************************************************/
static const signed char sgnMask[3] = {0x02,  0x04,  0x08};
static const signed char negMask[3] = {~0x03, ~0x07, ~0x0f};

static void DecodeTNSInfo(BitStreamInfo *bsi, int winSequence, TNSInfo *ti, signed char *tnsCoef)
{
	int i, w, f, coefBits, compress;
	signed char c, s, n;

	unsigned char *filtLength, *filtOrder, *filtDir;

	filtLength = ti->length;
	filtOrder =  ti->order;
	filtDir =    ti->dir;

	if (winSequence == 2) {
		/* short blocks */
		for (w = 0; w < NWINDOWS_SHORT; w++) {
			ti->numFilt[w] = GetBits(bsi, 1);
			if (ti->numFilt[w]) {
				ti->coefRes[w] = GetBits(bsi, 1) + 3;
				*filtLength =    GetBits(bsi, 4);
				*filtOrder =     GetBits(bsi, 3);
				if (*filtOrder) {
					*filtDir++ =      GetBits(bsi, 1);
					compress =        GetBits(bsi, 1);
					coefBits = (int)ti->coefRes[w] - compress;	/* 2, 3, or 4 */
					s = sgnMask[coefBits - 2];
					n = negMask[coefBits - 2];
					for (i = 0; i < *filtOrder; i++) {
						c = GetBits(bsi, coefBits);
						if (c & s)	c |= n;
						*tnsCoef++ = c;
					}
				}
				filtLength++;
				filtOrder++;
			}
		}
	} else {
		/* long blocks */
		ti->numFilt[0] = GetBits(bsi, 2);
		if (ti->numFilt[0])
			ti->coefRes[0] = GetBits(bsi, 1) + 3;
		for (f = 0; f < ti->numFilt[0]; f++) {
			*filtLength =      GetBits(bsi, 6);
			*filtOrder =       GetBits(bsi, 5);
			if (*filtOrder) {
				*filtDir++ =     GetBits(bsi, 1);
				compress =       GetBits(bsi, 1);
				coefBits = (int)ti->coefRes[0] - compress;	/* 2, 3, or 4 */
				s = sgnMask[coefBits - 2];
				n = negMask[coefBits - 2];
				for (i = 0; i < *filtOrder; i++) {
					c = GetBits(bsi, coefBits);
					if (c & s)	c |= n;
					*tnsCoef++ = c;
				}
			}
			filtLength++;
			filtOrder++;
		}
	}
}

/* bitstream field lengths for gain control data:
 *   gainBits[winSequence][0] = maxWindow (how many gain windows there are)
 *   gainBits[winSequence][1] = locBitsZero (bits for alocCode if window == 0)
 *   gainBits[winSequence][2] = locBits (bits for alocCode if window != 0)
 */
static const unsigned char gainBits[4][3] = {
	{1, 5, 5},  /* long */
	{2, 4, 2},  /* start */
	{8, 2, 2},  /* short */
	{2, 4, 5},  /* stop */
};

/**************************************************************************************
 * Function:    DecodeGainControlInfo
 *
 * Description: decode gain control information (SSR profile only)
 *
 * Inputs:      BitStreamInfo struct pointing to start of gain control info
 *                (14496-3, table 4.4.12)
 *              window sequence (short or long blocks)
 *
 * Outputs:     updated GainControlInfo struct
 *
 * Return:      none
 **************************************************************************************/
static void DecodeGainControlInfo(BitStreamInfo *bsi, int winSequence, GainControlInfo *gi)
{
	int bd, wd, ad;
	int locBits, locBitsZero, maxWin;
	
	gi->maxBand = GetBits(bsi, 2);
	maxWin =      (int)gainBits[winSequence][0];
	locBitsZero = (int)gainBits[winSequence][1];
	locBits =     (int)gainBits[winSequence][2];

	for (bd = 1; bd <= gi->maxBand; bd++) {
		for (wd = 0; wd < maxWin; wd++) {
			gi->adjNum[bd][wd] = GetBits(bsi, 3);
			for (ad = 0; ad < gi->adjNum[bd][wd]; ad++) {
				gi->alevCode[bd][wd][ad] = GetBits(bsi, 4);
				gi->alocCode[bd][wd][ad] = GetBits(bsi, (wd == 0 ? locBitsZero : locBits));
			}
		}
	}
}

/**************************************************************************************
 * Function:    DecodeICS
 *
 * Description: decode individual channel stream
 *
 * Inputs:      platform specific info struct
 *              BitStreamInfo struct pointing to start of individual channel stream
 *                (14496-3, table 4.4.24) 
 *              index of current channel
 *
 * Outputs:     updated section data, scale factor data, pulse data, TNS data, 
 *                and gain control data
 *
 * Return:      none
 **************************************************************************************/
static void DecodeICS(PSInfoBase *psi, BitStreamInfo *bsi, int ch)
{
	int globalGain;
	ICSInfo *icsInfo;
	PulseInfo *pi;
	TNSInfo *ti;
	GainControlInfo *gi;

	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);

	globalGain = GetBits(bsi, 8);
	if (!psi->commonWin)
		DecodeICSInfo(bsi, icsInfo, psi->sampRateIdx);

	DecodeSectionData(bsi, icsInfo->winSequence, icsInfo->numWinGroup, icsInfo->maxSFB, psi->sfbCodeBook[ch]);

	DecodeScaleFactors(bsi, icsInfo->numWinGroup, icsInfo->maxSFB, globalGain, psi->sfbCodeBook[ch], psi->scaleFactors[ch]);
	
	pi = &psi->pulseInfo[ch];
	pi->pulseDataPresent = GetBits(bsi, 1);
	if (pi->pulseDataPresent)
		DecodePulseInfo(bsi, pi);

	ti = &psi->tnsInfo[ch];
	ti->tnsDataPresent = GetBits(bsi, 1);
	if (ti->tnsDataPresent)
		DecodeTNSInfo(bsi, icsInfo->winSequence, ti, ti->coef);

	gi = &psi->gainControlInfo[ch];
	gi->gainControlDataPresent = GetBits(bsi, 1);
	if (gi->gainControlDataPresent)
		DecodeGainControlInfo(bsi, icsInfo->winSequence, gi);
}

/**************************************************************************************
 * Function:    DecodeNoiselessData
 *
 * Description: decode noiseless data (side info and transform coefficients)
 *
 * Inputs:      valid AACDecInfo struct
 *              double pointer to buffer pointing to start of individual channel stream
 *                (14496-3, table 4.4.24)
 *              pointer to bit offset
 *              pointer to number of valid bits remaining in buf
 *              index of current channel
 *
 * Outputs:     updated global gain, section data, scale factor data, pulse data,
 *                TNS data, gain control data, and spectral data
 *
 * Return:      0 if successful, error code (< 0) if error
 **************************************************************************************/
int DecodeNoiselessData(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail, int ch)
{
	int bitsUsed;
	BitStreamInfo bsi;
	PSInfoBase *psi;
	ICSInfo *icsInfo;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	icsInfo = (ch == 1 && psi->commonWin == 1) ? &(psi->icsInfo[0]) : &(psi->icsInfo[ch]);
	
	SetBitstreamPointer(&bsi, (*bitsAvail+7) >> 3, *buf);
	GetBits(&bsi, *bitOffset);

	DecodeICS(psi, &bsi, ch);

	if (icsInfo->winSequence == 2)
		DecodeSpectrumShort(psi, &bsi, ch);
	else
		DecodeSpectrumLong(psi, &bsi, ch);

	bitsUsed = CalcBitsUsed(&bsi, *buf, *bitOffset);
	*buf += ((bitsUsed + *bitOffset) >> 3);
	*bitOffset = ((bitsUsed + *bitOffset) & 0x07);
	*bitsAvail -= bitsUsed;

	aacDecInfo->sbDeinterleaveReqd[ch] = 0;
	aacDecInfo->tnsUsed |= psi->tnsInfo[ch].tnsDataPresent;	/* set flag if TNS used for any channel */

	return ERR_AAC_NONE;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrtabs.c - platform-independent tables for SBR (global, read-only)
 **************************************************************************************/

//#include "sbr.h"

/* k0Tab[sampRateIdx][k] = k0 = startMin + offset(bs_start_freq) for given sample rate (4.6.18.3.2.1) 
 * downsampled (single-rate) SBR not currently supported
 */
const unsigned char k0Tab[NUM_SAMPLE_RATES_SBR][16] = {
    {  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 16, 18, 20, 23, 27, 31 }, /* 96 kHz */
    {  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 16, 18, 20, 23, 27, 31 }, /* 88 kHz */
    {  6,  8,  9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 21, 23, 26, 30 }, /* 64 kHz */
    {  7,  9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 24, 27, 31 }, /* 48 kHz */
    {  8, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 23, 25, 28, 32 }, /* 44 kHz */
    { 10, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 27, 29, 32 }, /* 32 kHz */
    { 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 25, 27, 29, 32 }, /* 24 kHz */
    { 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26, 28, 30 }, /* 22 kHz */
    { 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 }, /* 16 kHz */
};

/* k2Tab[sampRateIdx][k] = stopVector(bs_stop_freq) for given sample rate, bs_stop_freq = [0, 13] (4.6.18.3.2.1)
 * generated with Matlab script calc_stopvec.m
 * downsampled (single-rate) SBR not currently supported
 */
const unsigned char k2Tab[NUM_SAMPLE_RATES_SBR][14] = {
	{ 13, 15, 17, 19, 21, 24, 27, 31, 35, 39, 44, 50, 57, 64 }, /* 96 kHz */
	{ 15, 17, 19, 21, 23, 26, 29, 33, 37, 41, 46, 51, 57, 64 }, /* 88 kHz */
	{ 20, 22, 24, 26, 28, 31, 34, 37, 41, 45, 49, 54, 59, 64 }, /* 64 kHz */
	{ 21, 23, 25, 27, 29, 32, 35, 38, 41, 45, 49, 54, 59, 64 }, /* 48 kHz */
	{ 23, 25, 27, 29, 31, 34, 37, 40, 43, 47, 51, 55, 59, 64 }, /* 44 kHz */
	{ 32, 34, 36, 38, 40, 42, 44, 46, 49, 52, 55, 58, 61, 64 }, /* 32 kHz */
	{ 32, 34, 36, 38, 40, 42, 44, 46, 49, 52, 55, 58, 61, 64 }, /* 24 kHz */
	{ 35, 36, 38, 40, 42, 44, 46, 48, 50, 52, 55, 58, 61, 64 }, /* 22 kHz */
	{ 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 60, 62, 64 }, /* 16 kHz */
};

/* NINT(2.048E6 / Fs) (figure 4.47) 
 * downsampled (single-rate) SBR not currently supported
 */
const unsigned char goalSBTab[NUM_SAMPLE_RATES_SBR] = { 
	21, 23, 32, 43, 46, 64, 85, 93, 128
};

const HuffInfo huffTabSBRInfo[10] = {
	{19, { 0,  2,  2,  2,  2,  2,  2,  2,  2,  2,  1,  2,  3,  4,  2,  7,  4,  8, 72,  0},   0},
	{20, { 0,  2,  2,  2,  2,  2,  1,  3,  3,  2,  4,  4,  4,  3,  2,  5,  6, 13, 15, 46}, 121},
	{17, { 1,  1,  1,  1,  1,  1,  1,  1,  1,  0,  2,  2,  0,  0,  1, 25, 10,  0,  0,  0}, 242},
	{19, { 1,  1,  1,  1,  1,  1,  1,  1,  1,  0,  3,  1,  0,  1,  1,  2,  1, 29,  2,  0}, 291},
	{19, { 1,  1,  1,  1,  1,  1,  1,  1,  1,  0,  2,  1,  2,  5,  1,  4,  2,  3, 34,  0}, 340},
	{20, { 1,  1,  1,  1,  1,  1,  0,  2,  2,  2,  2,  2,  1,  2,  3,  4,  4,  7, 10, 16}, 403},
	{14, { 1,  1,  1,  1,  1,  1,  1,  1,  1,  0,  0,  1, 13,  2,  0,  0,  0,  0,  0,  0}, 466},
	{14, { 1,  1,  1,  1,  1,  1,  1,  1,  1,  0,  1,  1,  6,  8,  0,  0,  0,  0,  0,  0}, 491},
	{14, { 1,  1,  1,  1,  1,  1,  0,  2,  0,  1,  1,  0, 51,  2,  0,  0,  0,  0,  0,  0}, 516},
	{ 8, { 1,  1,  1,  0,  1,  1,  0, 20,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0}, 579},
};

/* Huffman tables from appendix 4.A.6.1, includes offset of -LAV[i] for table i */
const signed short huffTabSBR[604] = {
	    /* SBR table sbr_tenv15 [121] (signed) */
	   0,   -1,    1,   -2,    2,   -3,    3,   -4,    4,   -5,    5,   -6,    6,   -7,    7,   -8, 
	  -9,    8,  -10,    9,  -11,   10,  -12,  -13,   11,  -14,   12,  -15,  -16,   13,  -19,  -18, 
	 -17,   14,  -24,  -20,   16,  -26,  -21,   15,  -23,  -25,  -22,  -60,  -59,  -58,  -57,  -56, 
	 -55,  -54,  -53,  -52,  -51,  -50,  -49,  -48,  -47,  -46,  -45,  -44,  -43,  -42,  -41,  -40, 
	 -39,  -38,  -37,  -36,  -35,  -34,  -33,  -32,  -31,  -30,  -29,  -28,  -27,   17,   18,   19, 
	  20,   21,   22,   23,   24,   25,   26,   27,   28,   29,   30,   31,   32,   33,   34,   35, 
	  36,   37,   38,   39,   40,   41,   42,   43,   44,   45,   46,   47,   48,   49,   50,   51, 
	  52,   53,   54,   55,   56,   57,   58,   59,   60, 
	    /* SBR table sbr_fenv15 [121] (signed) */
	   0,   -1,    1,   -2,   -3,    2,   -4,    3,   -5,    4,   -6,    5,   -7,    6,   -8,    7, 
	  -9,    8,  -10,    9,  -11,   10,   11,  -12,   12,  -13,   13,   14,  -14,  -15,   15,   16, 
	  17,  -16,  -17,  -18,  -19,   18,   19,  -20,  -21,   20,   21,  -24,  -23,  -22,  -26,  -28, 
	  22,   23,   25,  -41,  -25,   26,   27,  -30,  -27,   24,   28,   44,  -51,  -46,  -44,  -43, 
	 -37,  -33,  -31,  -29,   30,   37,   42,   47,   48,  -60,  -59,  -58,  -57,  -56,  -55,  -54, 
	 -53,  -52,  -50,  -49,  -48,  -47,  -45,  -42,  -40,  -39,  -38,  -36,  -35,  -34,  -32,   29, 
	  31,   32,   33,   34,   35,   36,   38,   39,   40,   41,   43,   45,   46,   49,   50,   51, 
	  52,   53,   54,   55,   56,   57,   58,   59,   60, 
	    /* SBR table sbr_tenv15b [49] (signed) */
	   0,    1,   -1,    2,   -2,    3,   -3,    4,   -4,   -5,    5,   -6,    6,    7,   -7,    8, 
	 -24,  -23,  -22,  -21,  -20,  -19,  -18,  -17,  -16,  -15,  -14,  -13,  -12,  -11,  -10,   -9, 
	  -8,    9,   10,   11,   12,   13,   14,   15,   16,   17,   18,   19,   20,   21,   22,   23, 
	  24, 
	    /* SBR table sbr_fenv15b [49] (signed) */
	   0,   -1,    1,   -2,    2,    3,   -3,   -4,    4,   -5,    5,   -6,    6,   -7,    7,    8, 
	  -9,   -8,  -24,  -23,  -22,  -21,  -20,  -19,  -18,  -17,  -16,  -15,  -14,  -13,  -12,  -11, 
	 -10,    9,   10,   11,   12,   13,   14,   15,   16,   17,   18,   19,   20,   21,   22,   23, 
	  24, 
	    /* SBR table sbr_tenv30 [63] (signed) */
	   0,   -1,    1,   -2,    2,   -3,    3,   -4,    4,   -5,    5,   -6,   -7,    6,   -8,    7, 
	  -9,  -10,    8,    9,   10,  -13,  -11,  -12,  -14,   11,   12,  -31,  -30,  -29,  -28,  -27, 
	 -26,  -25,  -24,  -23,  -22,  -21,  -20,  -19,  -18,  -17,  -16,  -15,   13,   14,   15,   16, 
	  17,   18,   19,   20,   21,   22,   23,   24,   25,   26,   27,   28,   29,   30,   31, 
	    /* SBR table sbr_fenv30 [63] (signed) */
	   0,   -1,    1,   -2,    2,   -3,    3,   -4,    4,   -5,    5,   -6,    6,   -7,    7,   -8, 
	   8,    9,   -9,  -10,   10,   11,  -11,  -12,   12,   13,  -13,  -15,   14,   15,  -14,   18, 
	 -18,  -24,  -19,   16,   17,  -22,  -21,  -16,   20,   21,   22,   25,  -23,  -20,   24,  -31, 
	 -30,  -29,  -28,  -27,  -26,  -25,  -17,   19,   23,   26,   27,   28,   29,   30,   31, 
	    /* SBR table sbr_tenv30b [25] (signed) */
	   0,    1,   -1,   -2,    2,    3,   -3,   -4,    4,   -5,  -12,  -11,  -10,   -9,   -8,   -7, 
	  -6,    5,    6,    7,    8,    9,   10,   11,   12, 
	    /* SBR table sbr_fenv30b [25] (signed) */
	   0,   -1,    1,   -2,    2,    3,   -3,   -4,    4,   -5,    5,    6,  -12,  -11,  -10,   -9, 
	  -8,   -7,   -6,    7,    8,    9,   10,   11,   12, 
	    /* SBR table sbr_tnoise30 [63] (signed) */
	   0,    1,   -1,   -2,    2,   -3,    3,   -4,    4,   -5,    5,   11,  -31,  -30,  -29,  -28, 
	 -27,  -26,  -25,  -24,  -23,  -22,  -21,  -20,  -19,  -18,  -17,  -16,  -15,  -14,  -13,  -12, 
	 -11,  -10,   -9,   -8,   -7,   -6,    6,    7,    8,    9,   10,   12,   13,   14,   15,   16, 
	  17,   18,   19,   20,   21,   22,   23,   24,   25,   26,   27,   28,   29,   30,   31, 
	    /* SBR table sbr_tnoise30b [25] (signed) */
	   0,   -1,    1,   -2,    2,  -12,  -11,  -10,   -9,   -8,   -7,   -6,   -5,   -4,   -3,    3, 
	   4,    5,    6,    7,    8,    9,   10,   11,   12, 
};

/* log2Tab[x] = floor(log2(x)), format = Q28 */
const int log2Tab[65] = {
	0x00000000, 0x00000000, 0x10000000, 0x195c01a3, 0x20000000, 0x25269e12, 0x295c01a3, 0x2ceaecfe, 
	0x30000000, 0x32b80347, 0x35269e12, 0x3759d4f8, 0x395c01a3, 0x3b350047, 0x3ceaecfe, 0x3e829fb6, 
	0x40000000, 0x41663f6f, 0x42b80347, 0x43f782d7, 0x45269e12, 0x4646eea2, 0x4759d4f8, 0x48608280, 
	0x495c01a3, 0x4a4d3c25, 0x4b350047, 0x4c1404ea, 0x4ceaecfe, 0x4dba4a47, 0x4e829fb6, 0x4f446359, 
	0x50000000, 0x50b5d69b, 0x51663f6f, 0x52118b11, 0x52b80347, 0x5359ebc5, 0x53f782d7, 0x549101ea, 
	0x55269e12, 0x55b88873, 0x5646eea2, 0x56d1fafd, 0x5759d4f8, 0x57dea15a, 0x58608280, 0x58df988f, 
	0x595c01a3, 0x59d5d9fd, 0x5a4d3c25, 0x5ac24113, 0x5b350047, 0x5ba58feb, 0x5c1404ea, 0x5c80730b, 
	0x5ceaecfe, 0x5d53847a, 0x5dba4a47, 0x5e1f4e51, 0x5e829fb6, 0x5ee44cd5, 0x5f446359, 0x5fa2f045, 
	0x60000000
};

/* coefficient table 4.A.87, format = Q31
 * reordered as:
 *   cTab[0],  cTab[64],  cTab[128], cTab[192], cTab[256], 
 *   cTab[2],  cTab[66],  cTab[130], cTab[194], cTab[258], 
 *   ...
 *   cTab[64], cTab[128], cTab[192], cTab[256], cTab[320]
 *
 * NOTE: cTab[1, 2, ... , 318, 319] = cTab[639, 638, ... 322, 321] 
 *   except cTab[384] = -cTab[256], cTab[512] = -cTab[128]
 */
const int cTabA[165] = {
	0x00000000, 0x0055dba1, 0x01b2e41d, 0x09015651, 0x2e3a7532, 0xffed978a, 0x006090c4, 0x01fd3ba0, 0x08a24899, 0x311af3a4, 
	0xfff0065d, 0x006b47fa, 0x024bf7a1, 0x082f552e, 0x33ff670e, 0xffef7b8b, 0x0075fded, 0x029e35b4, 0x07a8127d, 0x36e69691, 
	0xffee1650, 0x00807994, 0x02f3e48d, 0x070bbf58, 0x39ce0477, 0xffecc31b, 0x008a7dd7, 0x034d01f0, 0x06593912, 0x3cb41219, 
	0xffeb50b2, 0x009424c6, 0x03a966bb, 0x0590a67d, 0x3f962fb8, 0xffe9ca76, 0x009d10bf, 0x04083fec, 0x04b0adcb, 0x4272a385, 
	0xffe88ba8, 0x00a520bb, 0x04694101, 0x03b8f8dc, 0x4547daea, 0xffe79e16, 0x00abe79e, 0x04cc2fcf, 0x02a99097, 0x4812f848, 
	0xffe6d466, 0x00b1978d, 0x05303f87, 0x01816e06, 0x4ad237a2, 0xffe65416, 0x00b5c867, 0x05950122, 0x0040c496, 0x4d83976c, 
	0xffe66dd0, 0x00b8394b, 0x05f9c051, 0xfee723c6, 0x5024d70e, 0xffe69423, 0x00b8c6b0, 0x065dd56a, 0xfd7475d8, 0x52b449de, 
	0xffe75361, 0x00b73ab0, 0x06c0f0c0, 0xfbe8f5bd, 0x552f8ff7, 0xffe85b4b, 0x00b36acd, 0x0721bf22, 0xfa44a069, 0x579505f5, 
	0xffea353a, 0x00acbd2f, 0x077fedb3, 0xf887507c, 0x59e2f69e, 0xffec8409, 0x00a3508f, 0x07da2b7f, 0xf6b1f3c3, 0x5c16d0ae, 
	0xffef2395, 0x0096dcc2, 0x08303897, 0xf4c473c6, 0x5e2f6367, 0xfff294c3, 0x00872c63, 0x0880ffdd, 0xf2bf6ea4, 0x602b0c7f, 
	0xfff681d6, 0x007400b8, 0x08cb4e23, 0xf0a3959f, 0x6207f220, 0xfffb42b0, 0x005d36df, 0x090ec1fc, 0xee71b2fe, 0x63c45243, 
	0x00007134, 0x00426f36, 0x0949eaac, 0xec2a3f5f, 0x655f63f2, 0x0006b1cf, 0x0023b989, 0x097c1ee8, 0xe9cea84a, 0x66d76725, 
	0x000d31b5, 0x0000e790, 0x09a3e163, 0xe75f8bb8, 0x682b39a4, 0x001471f8, 0xffda17f2, 0x09c0e59f, 0xe4de0cb0, 0x6959709d, 
	0x001c3549, 0xffaea5d6, 0x09d19ca9, 0xe24b8f66, 0x6a619c5e, 0x0024dd50, 0xff7ee3f1, 0x09d5560b, 0xdfa93ab5, 0x6b42a864, 
	0x002d8e42, 0xff4aabc8, 0x09caeb0f, 0xdcf898fb, 0x6bfbdd98, 0x003745f9, 0xff120d70, 0x09b18a1d, 0xda3b176a, 0x6c8c4c7a, 
	0x004103f4, 0xfed4bec3, 0x09881dc5, 0xd7722f04, 0x6cf4073e, 0x004b6c46, 0xfe933dc0, 0x094d7ec2, 0xd49fd55f, 0x6d32730f, 
	0x0055dba1, 0x01b2e41d, 0x09015651, 0x2e3a7532, 0x6d474e1d, 
};

/* coefficient table 4.A.87, format = Q31
 * reordered as cTab[0], cTab[64], cTab[128], ... cTab[576], cTab[1], cTab[65], cTab[129], ... cTab[639] 
 * keeping full table (not using symmetry) to allow sequential access in synth filter inner loop
 * format = Q31
 */
const int cTabS[640] = {
	0x00000000, 0x0055dba1, 0x01b2e41d, 0x09015651, 0x2e3a7532, 0x6d474e1d, 0xd1c58ace, 0x09015651, 0xfe4d1be3, 0x0055dba1, 
	0xffede50e, 0x005b5371, 0x01d78bfc, 0x08d3e41b, 0x2faa221c, 0x6d41d963, 0xd3337b3d, 0x09299ead, 0xfe70b8d1, 0x0050b177, 
	0xffed978a, 0x006090c4, 0x01fd3ba0, 0x08a24899, 0x311af3a4, 0x6d32730f, 0xd49fd55f, 0x094d7ec2, 0xfe933dc0, 0x004b6c46, 
	0xffefc9b9, 0x0065fde5, 0x02244a24, 0x086b1eeb, 0x328cc6f0, 0x6d18520e, 0xd60a46e5, 0x096d0e21, 0xfeb48d0d, 0x00465348, 
	0xfff0065d, 0x006b47fa, 0x024bf7a1, 0x082f552e, 0x33ff670e, 0x6cf4073e, 0xd7722f04, 0x09881dc5, 0xfed4bec3, 0x004103f4, 
	0xffeff6ca, 0x0070c8a5, 0x0274ba43, 0x07ee507c, 0x3572ec70, 0x6cc59bab, 0xd8d7f21f, 0x099ec3dc, 0xfef3f6ab, 0x003c1fa4, 
	0xffef7b8b, 0x0075fded, 0x029e35b4, 0x07a8127d, 0x36e69691, 0x6c8c4c7a, 0xda3b176a, 0x09b18a1d, 0xff120d70, 0x003745f9, 
	0xffeedfa4, 0x007b3875, 0x02c89901, 0x075ca90c, 0x385a49c4, 0x6c492217, 0xdb9b5b12, 0x09c018ce, 0xff2ef725, 0x00329ab6, 
	0xffee1650, 0x00807994, 0x02f3e48d, 0x070bbf58, 0x39ce0477, 0x6bfbdd98, 0xdcf898fb, 0x09caeb0f, 0xff4aabc8, 0x002d8e42, 
	0xffed651d, 0x0085c217, 0x03201116, 0x06b559c3, 0x3b415115, 0x6ba4629f, 0xde529086, 0x09d1fa23, 0xff6542d1, 0x00293718, 
	0xffecc31b, 0x008a7dd7, 0x034d01f0, 0x06593912, 0x3cb41219, 0x6b42a864, 0xdfa93ab5, 0x09d5560b, 0xff7ee3f1, 0x0024dd50, 
	0xffebe77b, 0x008f4bfc, 0x037ad438, 0x05f7fb90, 0x3e25b17e, 0x6ad73e8d, 0xe0fc421e, 0x09d52709, 0xff975c01, 0x002064f8, 
	0xffeb50b2, 0x009424c6, 0x03a966bb, 0x0590a67d, 0x3f962fb8, 0x6a619c5e, 0xe24b8f66, 0x09d19ca9, 0xffaea5d6, 0x001c3549, 
	0xffea9192, 0x0098b855, 0x03d8afe6, 0x05237f9d, 0x41058bc6, 0x69e29784, 0xe396a45d, 0x09cab9f2, 0xffc4e365, 0x0018703f, 
	0xffe9ca76, 0x009d10bf, 0x04083fec, 0x04b0adcb, 0x4272a385, 0x6959709d, 0xe4de0cb0, 0x09c0e59f, 0xffda17f2, 0x001471f8, 
	0xffe940f4, 0x00a1039c, 0x043889c6, 0x0437fb0a, 0x43de620a, 0x68c7269b, 0xe620c476, 0x09b3d77f, 0xffee183b, 0x0010bc63, 
	0xffe88ba8, 0x00a520bb, 0x04694101, 0x03b8f8dc, 0x4547daea, 0x682b39a4, 0xe75f8bb8, 0x09a3e163, 0x0000e790, 0x000d31b5, 
	0xffe83a07, 0x00a8739d, 0x049aa82f, 0x03343533, 0x46aea856, 0x6785c24d, 0xe89971b7, 0x099140a7, 0x00131c75, 0x0009aa3f, 
	0xffe79e16, 0x00abe79e, 0x04cc2fcf, 0x02a99097, 0x4812f848, 0x66d76725, 0xe9cea84a, 0x097c1ee8, 0x0023b989, 0x0006b1cf, 
	0xffe7746e, 0x00af374c, 0x04fe20be, 0x02186a91, 0x4973fef1, 0x661fd6b8, 0xeafee7f1, 0x0963ed46, 0x0033b927, 0x00039609, 
	0xffe6d466, 0x00b1978d, 0x05303f87, 0x01816e06, 0x4ad237a2, 0x655f63f2, 0xec2a3f5f, 0x0949eaac, 0x00426f36, 0x00007134, 
	0xffe6afee, 0x00b3d15c, 0x05626209, 0x00e42fa2, 0x4c2ca3df, 0x64964063, 0xed50a31d, 0x092d7970, 0x00504f41, 0xfffdfa25, 
	0xffe65416, 0x00b5c867, 0x05950122, 0x0040c496, 0x4d83976c, 0x63c45243, 0xee71b2fe, 0x090ec1fc, 0x005d36df, 0xfffb42b0, 
	0xffe681c6, 0x00b74c37, 0x05c76fed, 0xff96db90, 0x4ed62be3, 0x62ea6474, 0xef8d4d7b, 0x08edfeaa, 0x006928a0, 0xfff91fca, 
	0xffe66dd0, 0x00b8394b, 0x05f9c051, 0xfee723c6, 0x5024d70e, 0x6207f220, 0xf0a3959f, 0x08cb4e23, 0x007400b8, 0xfff681d6, 
	0xffe66fac, 0x00b8fe0d, 0x062bf5ec, 0xfe310657, 0x516eefb9, 0x611d58a3, 0xf1b461ab, 0x08a75da4, 0x007e0393, 0xfff48700, 
	0xffe69423, 0x00b8c6b0, 0x065dd56a, 0xfd7475d8, 0x52b449de, 0x602b0c7f, 0xf2bf6ea4, 0x0880ffdd, 0x00872c63, 0xfff294c3, 
	0xffe6fed4, 0x00b85f70, 0x068f8b44, 0xfcb1d740, 0x53f495aa, 0x5f30ff5f, 0xf3c4e887, 0x08594887, 0x008f87aa, 0xfff0e7ef, 
	0xffe75361, 0x00b73ab0, 0x06c0f0c0, 0xfbe8f5bd, 0x552f8ff7, 0x5e2f6367, 0xf4c473c6, 0x08303897, 0x0096dcc2, 0xffef2395, 
	0xffe80414, 0x00b58c8c, 0x06f1825d, 0xfb19b7bd, 0x56654bdd, 0x5d26be9b, 0xf5be0fa9, 0x08061671, 0x009da526, 0xffedc418, 
	0xffe85b4b, 0x00b36acd, 0x0721bf22, 0xfa44a069, 0x579505f5, 0x5c16d0ae, 0xf6b1f3c3, 0x07da2b7f, 0x00a3508f, 0xffec8409, 
	0xffe954d0, 0x00b06b68, 0x075112a2, 0xf96916f5, 0x58befacd, 0x5b001db8, 0xf79fa13a, 0x07ad8c26, 0x00a85e94, 0xffeb3849, 
	0xffea353a, 0x00acbd2f, 0x077fedb3, 0xf887507c, 0x59e2f69e, 0x59e2f69e, 0xf887507c, 0x077fedb3, 0x00acbd2f, 0xffea353a, 
	0xffeb3849, 0x00a85e94, 0x07ad8c26, 0xf79fa13a, 0x5b001db8, 0x58befacd, 0xf96916f5, 0x075112a2, 0x00b06b68, 0xffe954d0, 
	0xffec8409, 0x00a3508f, 0x07da2b7f, 0xf6b1f3c3, 0x5c16d0ae, 0x579505f5, 0xfa44a069, 0x0721bf22, 0x00b36acd, 0xffe85b4b, 
	0xffedc418, 0x009da526, 0x08061671, 0xf5be0fa9, 0x5d26be9b, 0x56654bdd, 0xfb19b7bd, 0x06f1825d, 0x00b58c8c, 0xffe80414, 
	0xffef2395, 0x0096dcc2, 0x08303897, 0xf4c473c6, 0x5e2f6367, 0x552f8ff7, 0xfbe8f5bd, 0x06c0f0c0, 0x00b73ab0, 0xffe75361, 
	0xfff0e7ef, 0x008f87aa, 0x08594887, 0xf3c4e887, 0x5f30ff5f, 0x53f495aa, 0xfcb1d740, 0x068f8b44, 0x00b85f70, 0xffe6fed4, 
	0xfff294c3, 0x00872c63, 0x0880ffdd, 0xf2bf6ea4, 0x602b0c7f, 0x52b449de, 0xfd7475d8, 0x065dd56a, 0x00b8c6b0, 0xffe69423, 
	0xfff48700, 0x007e0393, 0x08a75da4, 0xf1b461ab, 0x611d58a3, 0x516eefb9, 0xfe310657, 0x062bf5ec, 0x00b8fe0d, 0xffe66fac, 
	0xfff681d6, 0x007400b8, 0x08cb4e23, 0xf0a3959f, 0x6207f220, 0x5024d70e, 0xfee723c6, 0x05f9c051, 0x00b8394b, 0xffe66dd0, 
	0xfff91fca, 0x006928a0, 0x08edfeaa, 0xef8d4d7b, 0x62ea6474, 0x4ed62be3, 0xff96db90, 0x05c76fed, 0x00b74c37, 0xffe681c6, 
	0xfffb42b0, 0x005d36df, 0x090ec1fc, 0xee71b2fe, 0x63c45243, 0x4d83976c, 0x0040c496, 0x05950122, 0x00b5c867, 0xffe65416, 
	0xfffdfa25, 0x00504f41, 0x092d7970, 0xed50a31d, 0x64964063, 0x4c2ca3df, 0x00e42fa2, 0x05626209, 0x00b3d15c, 0xffe6afee, 
	0x00007134, 0x00426f36, 0x0949eaac, 0xec2a3f5f, 0x655f63f2, 0x4ad237a2, 0x01816e06, 0x05303f87, 0x00b1978d, 0xffe6d466, 
	0x00039609, 0x0033b927, 0x0963ed46, 0xeafee7f1, 0x661fd6b8, 0x4973fef1, 0x02186a91, 0x04fe20be, 0x00af374c, 0xffe7746e, 
	0x0006b1cf, 0x0023b989, 0x097c1ee8, 0xe9cea84a, 0x66d76725, 0x4812f848, 0x02a99097, 0x04cc2fcf, 0x00abe79e, 0xffe79e16, 
	0x0009aa3f, 0x00131c75, 0x099140a7, 0xe89971b7, 0x6785c24d, 0x46aea856, 0x03343533, 0x049aa82f, 0x00a8739d, 0xffe83a07, 
	0x000d31b5, 0x0000e790, 0x09a3e163, 0xe75f8bb8, 0x682b39a4, 0x4547daea, 0x03b8f8dc, 0x04694101, 0x00a520bb, 0xffe88ba8, 
	0x0010bc63, 0xffee183b, 0x09b3d77f, 0xe620c476, 0x68c7269b, 0x43de620a, 0x0437fb0a, 0x043889c6, 0x00a1039c, 0xffe940f4, 
	0x001471f8, 0xffda17f2, 0x09c0e59f, 0xe4de0cb0, 0x6959709d, 0x4272a385, 0x04b0adcb, 0x04083fec, 0x009d10bf, 0xffe9ca76, 
	0x0018703f, 0xffc4e365, 0x09cab9f2, 0xe396a45d, 0x69e29784, 0x41058bc6, 0x05237f9d, 0x03d8afe6, 0x0098b855, 0xffea9192, 
	0x001c3549, 0xffaea5d6, 0x09d19ca9, 0xe24b8f66, 0x6a619c5e, 0x3f962fb8, 0x0590a67d, 0x03a966bb, 0x009424c6, 0xffeb50b2, 
	0x002064f8, 0xff975c01, 0x09d52709, 0xe0fc421e, 0x6ad73e8d, 0x3e25b17e, 0x05f7fb90, 0x037ad438, 0x008f4bfc, 0xffebe77b, 
	0x0024dd50, 0xff7ee3f1, 0x09d5560b, 0xdfa93ab5, 0x6b42a864, 0x3cb41219, 0x06593912, 0x034d01f0, 0x008a7dd7, 0xffecc31b, 
	0x00293718, 0xff6542d1, 0x09d1fa23, 0xde529086, 0x6ba4629f, 0x3b415115, 0x06b559c3, 0x03201116, 0x0085c217, 0xffed651d, 
	0x002d8e42, 0xff4aabc8, 0x09caeb0f, 0xdcf898fb, 0x6bfbdd98, 0x39ce0477, 0x070bbf58, 0x02f3e48d, 0x00807994, 0xffee1650, 
	0x00329ab6, 0xff2ef725, 0x09c018ce, 0xdb9b5b12, 0x6c492217, 0x385a49c4, 0x075ca90c, 0x02c89901, 0x007b3875, 0xffeedfa4, 
	0x003745f9, 0xff120d70, 0x09b18a1d, 0xda3b176a, 0x6c8c4c7a, 0x36e69691, 0x07a8127d, 0x029e35b4, 0x0075fded, 0xffef7b8b, 
	0x003c1fa4, 0xfef3f6ab, 0x099ec3dc, 0xd8d7f21f, 0x6cc59bab, 0x3572ec70, 0x07ee507c, 0x0274ba43, 0x0070c8a5, 0xffeff6ca, 
	0x004103f4, 0xfed4bec3, 0x09881dc5, 0xd7722f04, 0x6cf4073e, 0x33ff670e, 0x082f552e, 0x024bf7a1, 0x006b47fa, 0xfff0065d, 
	0x00465348, 0xfeb48d0d, 0x096d0e21, 0xd60a46e5, 0x6d18520e, 0x328cc6f0, 0x086b1eeb, 0x02244a24, 0x0065fde5, 0xffefc9b9, 
	0x004b6c46, 0xfe933dc0, 0x094d7ec2, 0xd49fd55f, 0x6d32730f, 0x311af3a4, 0x08a24899, 0x01fd3ba0, 0x006090c4, 0xffed978a, 
	0x0050b177, 0xfe70b8d1, 0x09299ead, 0xd3337b3d, 0x6d41d963, 0x2faa221c, 0x08d3e41b, 0x01d78bfc, 0x005b5371, 0xffede50f, 
};

/* noise table 4.A.88, format = Q31 */
const int noiseTab[512*2] = {
	0x8010fd38, 0xb3dc7948, 0x7c4e2301, 0xa9904192, 0x121622a7, 0x86489625, 0xc3d53d25, 0xd0343fa9, 
	0x674d6f70, 0x25f4e9fd, 0xce1a8c8b, 0x72a726c5, 0xfea6efc6, 0xaa4adb1a, 0x8b2dd628, 0xf14029e4, 
	0x46321c1a, 0x604889a0, 0x33363b63, 0x815ed069, 0x802b4315, 0x8f2bf7f3, 0x85b86073, 0x745cfb46, 
	0xc57886b3, 0xb76731f0, 0xa2a66772, 0x828ca631, 0x60cc145e, 0x1ad1010f, 0x090c83d4, 0x9bd7ba87, 
	0x5f5aeea2, 0x8b4dbd99, 0x848e7b1e, 0x86bb9fa2, 0x26f18ae5, 0xc0b81194, 0x553407bf, 0x52c17953, 
	0x755f468d, 0x166b04f8, 0xa5687981, 0x4343248b, 0xa6558d5e, 0xc5f6fab7, 0x80a4fb8c, 0x8cb53cb7, 
	0x7da68a54, 0x9cd8df8a, 0xba05376c, 0xfcb58ee2, 0xfdd657a4, 0x005e35ca, 0x91c75c55, 0x367651e6, 
	0x816abf85, 0x8f831c4f, 0x423f9c9c, 0x55aa919e, 0x80779834, 0xb59f4244, 0x800a095c, 0x7de9e0cc, 
	0x46bda5cb, 0x4c184464, 0x2c438f71, 0x797216b5, 0x5035cee6, 0xa0c3a26e, 0x9d3f95fa, 0xd4a100c0, 
	0x8ac30dac, 0x04b87397, 0x9e5ac516, 0x8b0b442e, 0x66210ad6, 0x88ba7598, 0x45b9bd33, 0xf0be5087, 
	0x9261b85e, 0x364f6a31, 0x891c4b50, 0x23ad08ce, 0xf10366a6, 0x80414276, 0x1b562e06, 0x8be21591, 
	0x9e798195, 0x7fb4045c, 0x7d9506cf, 0x854e691f, 0x9207f092, 0x7a94c9d5, 0x88911536, 0x3f45cc61, 
	0x27059279, 0xa5b57109, 0x6d2bb67b, 0x3bdc5379, 0x74e662d8, 0x80348f8c, 0xf875e638, 0x5a8caea1, 
	0x2459ae75, 0x2c54b939, 0x79ee3203, 0xb9bc8683, 0x9b6f630c, 0x9f45b351, 0x8563b2b9, 0xe5dbba41, 
	0x697c7d0d, 0x7bb7c90e, 0xac900866, 0x8e6b5177, 0x8822dd37, 0x7fd5a91e, 0x7506da05, 0x82302aca, 
	0xa5e4be04, 0x4b4288eb, 0x00b8bc9f, 0x4f1033e4, 0x7200d612, 0x43900c8c, 0xa815b900, 0x676ed1d4, 
	0x5c5f23b2, 0xa758ee11, 0xaf73abfa, 0x11714ec0, 0x265239e0, 0xc50de679, 0x8a84e341, 0xa1438354, 
	0x7f1a341f, 0x343ec96b, 0x696e71b0, 0xa13bde39, 0x81e75094, 0x80091111, 0x853a73bf, 0x80f9c1ee, 
	0xe4980086, 0x886a8e28, 0xa7e89426, 0xdd93edd7, 0x7592100d, 0x0bfa8123, 0x850a26d4, 0x2e34f395, 
	0x421b6c00, 0xa4a462e4, 0x4e3f5090, 0x3c189f4c, 0x3c971a56, 0xdd0376d2, 0x747a5367, 0x7bcbc9d7, 
	0x3966be6a, 0x7efda616, 0x55445e15, 0x7ba2ab3f, 0x5fe684f2, 0x8cf42af9, 0x808c61c3, 0x4390c27b, 
	0x7cac62ff, 0xea6cab22, 0x5d0902ad, 0xc27b7208, 0x7a27389d, 0x5820a357, 0xa29bbe59, 0x9df0f1fd, 
	0x92bd67e5, 0x7195b587, 0x97cac65b, 0x8339807e, 0x8f72d832, 0x5fad8685, 0xa462d9d3, 0x81d46214, 
	0x6ae93e1d, 0x6b23a5b9, 0xc2732874, 0x81795268, 0x7c568cb6, 0x668513ea, 0x428d024e, 0x66b78b3a, 
	0xfee9ef03, 0x9ddcbb82, 0xa605f07e, 0x46dc55e0, 0x85415054, 0xc89ec271, 0x7c42edfb, 0x0befe59b, 
	0x89b8f607, 0x6d732a1a, 0xa7081ebd, 0x7e403258, 0x21feeb7b, 0x5dd7a1e7, 0x23e3a31a, 0x129bc896, 
	0xa11a6b54, 0x7f1e031c, 0xfdc1a4d1, 0x96402e53, 0xb9700f1a, 0x8168ecd6, 0x7d63d3cc, 0x87a70d65, 
	0x81075a7a, 0x55c8caa7, 0xa95d00b5, 0x102b1652, 0x0bb30215, 0xe5b63237, 0xa446ca44, 0x82d4c333, 
	0x67b2e094, 0x44c3d661, 0x33fd6036, 0xde1ea2a1, 0xa95e8e47, 0x78f66eb9, 0x6f2aef1e, 0xe8887247, 
	0x80a3b70e, 0xfca0d9d3, 0x6bf0fd20, 0x0d5226de, 0xf4341c87, 0x5902df05, 0x7ff1a38d, 0xf02e5a5b, 
	0x99f129af, 0x8ac63d01, 0x7b53f599, 0x7bb32532, 0x99ac59b0, 0x5255a80f, 0xf1320a41, 0x2497aa5c, 
	0xcce60bd8, 0x787c634b, 0x7ed58c5b, 0x8a28eb3a, 0x24a5e647, 0x8b79a2c1, 0x955f5ce5, 0xa9d12bc4, 
	0x7a1e20c6, 0x3eeda7ac, 0xf7be823a, 0x042924ce, 0x808b3f03, 0x364248da, 0xac2895e5, 0x69a8b5fa, 
	0x97fe8b63, 0xbdeac9aa, 0x8073e0ad, 0x6c25dba7, 0x005e51d2, 0x52e74389, 0x59d3988c, 0xe5d1f39c, 
	0x7b57dc91, 0x341adbe7, 0xa7d42b8d, 0x74e9f335, 0xd35bf7d8, 0x5b7c0a4b, 0x75bc0874, 0x552129bf, 
	0x8144b70d, 0x6de93bbb, 0x5825f14b, 0x473ec5ca, 0x80a8f37c, 0xe6552d69, 0x7898360b, 0x806379b0, 
	0xa9b59339, 0x3f6bf60c, 0xc367d731, 0x920ade99, 0x125592f7, 0x877e5ed1, 0xda895d95, 0x075f2ece, 
	0x380e5f5e, 0x9b006b62, 0xd17a6dd2, 0x530a0e13, 0xf4cc9a14, 0x7d0a0ed4, 0x847c6e3f, 0xbaee4975, 
	0x47131163, 0x64fb2cac, 0x5e2100a6, 0x7b756a42, 0xd87609f4, 0x98bfe48c, 0x0493745e, 0x836c5784, 
	0x7e5ccb40, 0x3df6b476, 0x97700d28, 0x8bbd93fd, 0x56de9cdb, 0x680b4e65, 0xebc3d90e, 0x6d286793, 
	0x6753712e, 0xe05c98a7, 0x3d2b6b85, 0xc4b18ddb, 0x7b59b869, 0x31435688, 0x811888e9, 0xe011ee7a, 
	0x6a5844f9, 0x86ae35ea, 0xb4cbc10b, 0x01a6f5d6, 0x7a49ed64, 0x927caa49, 0x847ddaed, 0xae0d9bb6, 
	0x836bdb04, 0x0fd810a6, 0x74fe126b, 0x4a346b5f, 0x80184d36, 0x5afd153c, 0x90cc8102, 0xe606d0e6, 
	0xde69aa58, 0xa89f1222, 0xe06df715, 0x8fd16144, 0x0317c3e8, 0x22ce92fc, 0x690c3eca, 0x93166f02, 
	0x71573414, 0x8d43cffb, 0xe8bd0bb6, 0xde86770f, 0x0bf99a41, 0x4633a661, 0xba064108, 0x7adafae3, 
	0x2f6cde5d, 0xb350a52c, 0xa5ebfb0b, 0x74c57b46, 0xd3b603b5, 0x80b70892, 0xa7f7fa53, 0xd94b566c, 
	0xdda3fd86, 0x6a635793, 0x3ed005ca, 0xc5f087d8, 0x31e3a746, 0x7a4278f9, 0x82def1f9, 0x06caa2b2, 
	0xe9d2c349, 0x8940e7f7, 0x7feef8dd, 0x4a9b01f0, 0xacde69f8, 0x57ddc280, 0xf09e4ba4, 0xb6d9f729, 
	0xb48c18f2, 0xd3654aa9, 0xca7a03c8, 0x14d57545, 0x7fda87a5, 0x0e411366, 0xb77d0df0, 0x8c2aa467, 
	0x787f2590, 0x2d292db1, 0x9f12682c, 0x44ac364d, 0x1a4b31a6, 0x871f7ded, 0x7ff99167, 0x6630a1d5, 
	0x25385eb9, 0x2d4dd549, 0xaf8a7004, 0x319ebe0f, 0x379ab730, 0x81dc56a4, 0x822d8523, 0x1ae8554c, 
	0x18fa0786, 0x875f7de4, 0x85ca350f, 0x7de818dc, 0x7786a38f, 0xa5456355, 0x92e60f88, 0xf5526122, 
	0x916039bc, 0xc561e2de, 0x31c42042, 0x7c82e290, 0x75d158b2, 0xb015bda1, 0x7220c750, 0x46565441, 
	0xd0da1fdd, 0x7b777481, 0x782e73c6, 0x8cd72b7b, 0x7f1006aa, 0xfb30e51e, 0x87994818, 0x34e7c7db, 
	0x7faae06b, 0xea74fbc0, 0xd20c7af4, 0xc44f396b, 0x06b4234e, 0xdf2e2a93, 0x2efb07c8, 0xce861911, 
	0x7550ea05, 0xd8d90bbb, 0x58522eec, 0x746b3520, 0xce844ce9, 0x7f5cacc3, 0xda8f17e0, 0x2fedf9cb, 
	0xb2f77ec4, 0x6f13f4c0, 0x834de085, 0x7b7ace4b, 0x713b16ac, 0x499c5ab0, 0x06a7961d, 0x1b39a48a, 
	0xbb853e6e, 0x7c781cc1, 0xc0baebf5, 0x7dace394, 0x815ceebc, 0xcc7b27d4, 0x8274b181, 0xa2be40a2, 
	0xdd01d5dc, 0x7fefeb14, 0x0813ec78, 0xba3077cc, 0xe5cf1e1c, 0xedcfacae, 0x54c43a9b, 0x5cd62a42, 
	0x93806b55, 0x03095c5b, 0x8e076ae3, 0x71bfcd2a, 0x7ac1989b, 0x623bc71a, 0x5e15d4d2, 0xfb341dd1, 
	0xd75dfbca, 0xd0da32be, 0xd4569063, 0x337869da, 0x3d30606a, 0xcd89cca2, 0x7dd2ae36, 0x028c03cd, 
	0xd85e052c, 0xe8dc9ec5, 0x7ffd9241, 0xde5bf4c6, 0x88c4b235, 0x8228be2e, 0x7fe6ec64, 0x996abe6a, 
	0xdeb0666d, 0x9eb86611, 0xd249b922, 0x18b3e26b, 0x80211168, 0x5f8bb99c, 0x6ecb0dd2, 0x4728ff8d, 
	0x2ac325b8, 0x6e5169d2, 0x7ebbd68d, 0x05e41d17, 0xaaa19f28, 0x8ab238a6, 0x51f105be, 0x140809cc, 
	0x7f7345d9, 0x3aae5a9d, 0xaecec6e4, 0x1afb3473, 0xf6229ed1, 0x8d55f467, 0x7e32003a, 0x70f30c14, 
	0x6686f33f, 0xd0d45ed8, 0x644fab57, 0x3a3fbbd3, 0x0b255fc4, 0x679a1701, 0x90e17b6e, 0x325d537b, 
	0xcd7b9b87, 0xaa7be2a2, 0x7d47c966, 0xa33dbce5, 0x8659c3bb, 0x72a41367, 0x15c446e0, 0x45fe8b0a, 
	0x9d8ddf26, 0x84d47643, 0x7fabe0da, 0x36a70122, 0x7a28ebfe, 0x7c29b8b8, 0x7f760406, 0xbabe4672, 
	0x23ea216e, 0x92bcc50a, 0x6d20dba2, 0xad5a7c7e, 0xbf3897f5, 0xabb793e1, 0x8391fc7e, 0xe270291c, 
	0x7a248d58, 0x80f8fd15, 0x83ef19f3, 0x5e6ece7d, 0x278430c1, 0x35239f4d, 0xe09c073b, 0x50e78cb5, 
	0xd4b811bd, 0xce834ee0, 0xf88aaa34, 0xf71da5a9, 0xe2b0a1d5, 0x7c3aef31, 0xe84eabca, 0x3ce25964, 
	0xf29336d3, 0x8fa78b2c, 0xa3fc3415, 0x63e1313d, 0x7fbc74e0, 0x7340bc93, 0x49ae583b, 0x8b79de4b, 
	0x25011ce9, 0x7b462279, 0x36007db0, 0x3da1599c, 0x77780772, 0xc845c9bb, 0x83ba68be, 0x6ee507d1, 
	0x2f0159b8, 0x5392c4ed, 0x98336ff6, 0x0b3c7f11, 0xde697aac, 0x893fc8d0, 0x6b83f8f3, 0x47799a0d, 
	0x801d9dfc, 0x8516a83e, 0x5f8d22ec, 0x0f8ba384, 0xa049dc4b, 0xdd920b05, 0x7a99bc9f, 0x9ad19344, 
	0x7a345dba, 0xf501a13f, 0x3e58bf19, 0x7fffaf9a, 0x3b4e1511, 0x0e08b991, 0x9e157620, 0x7230a326, 
	0x4977f9ff, 0x2d2bbae1, 0x607aa7fc, 0x7bc85d5f, 0xb441bbbe, 0x8d8fa5f2, 0x601cce26, 0xda1884f2, 
	0x81c82d64, 0x200b709c, 0xcbd36abe, 0x8cbdddd3, 0x55ab61d3, 0x7e3ee993, 0x833f18aa, 0xffc1aaea, 
	0x7362e16a, 0x7fb85db2, 0x904ee04c, 0x7f04dca6, 0x8ad7a046, 0xebe7d8f7, 0xfbc4c687, 0xd0609458, 
	0x093ed977, 0x8e546085, 0x7f5b8236, 0x7c47e118, 0xa01f2641, 0x7ffb3e48, 0x05de7cda, 0x7fc281b9, 
	0x8e0278fc, 0xd74e6d07, 0x94c24450, 0x7cf9e641, 0x2ad27871, 0x919fa815, 0x805fd205, 0x7758397f, 
	0xe2c7e02c, 0x1828e194, 0x5613d6fe, 0xfb55359f, 0xf9699516, 0x8978ee26, 0x7feebad9, 0x77d71d82, 
	0x55b28b60, 0x7e997600, 0x80821a6b, 0xc6d78af1, 0x691822ab, 0x7f6982a0, 0x7ef56f99, 0x5c307f40, 
	0xac6f8b76, 0x42cc8ba4, 0x782c61d9, 0xa0224dd0, 0x7bd234d1, 0x74576e3b, 0xe38cfe9a, 0x491e66ef, 
	0xc78291c5, 0x895bb87f, 0x924f7889, 0x71b89394, 0x757b779d, 0xc4a9c604, 0x5cdf7829, 0x8020e9df, 
	0x805e8245, 0x4a82c398, 0x6360bd62, 0x78bb60fc, 0x09e0d014, 0x4b0ea180, 0xb841978b, 0x69a0e864, 
	0x7df35977, 0x3284b0dd, 0x3cdc2efd, 0x57d31f5e, 0x541069cc, 0x1776e92e, 0x04309ea3, 0xa015eb2d, 
	0xce7bfabc, 0x41b638f8, 0x8365932e, 0x846ab44c, 0xbbcc80cb, 0x8afa6cac, 0x7fc422ea, 0x4e403fc0, 
	0xbfac9aee, 0x8e4c6709, 0x028e01fb, 0x6d160a9b, 0x7fe93004, 0x790f9cdc, 0x6a1f37a0, 0xf7e7ef30, 
	0xb4ea0f04, 0x7bf4c8e6, 0xe981701f, 0xc258a9d3, 0x6acbbfba, 0xef5479c7, 0x079c8bd8, 0x1a410f56, 
	0x6853b799, 0x86cd4f01, 0xc66e23b6, 0x34585565, 0x8d1fe00d, 0x7fcdba1a, 0x32c9717b, 0xa02f9f48, 
	0xf64940db, 0x5ed7d8f1, 0x61b823b2, 0x356f8918, 0xa0a7151e, 0x793fc969, 0x530beaeb, 0x34e93270, 
	0x4fc4ddb5, 0x88d58b6c, 0x36094774, 0xf620ac80, 0x03763a72, 0xf910c9a6, 0x6666fb2d, 0x752c8be8, 
	0x9a6dfdd8, 0xd1a7117d, 0x51c1b1d4, 0x0a67773d, 0x43b32a79, 0x4cdcd085, 0x5f067d30, 0x05bfe92a, 
	0x7ed7d203, 0xe71a3c85, 0x99127ce2, 0x8eb3cac4, 0xad4bbcea, 0x5c6a0fd0, 0x0eec04af, 0x94e95cd4, 
	0x8654f921, 0x83eabb5d, 0xb058d7ca, 0x69f12d3c, 0x03d881b2, 0x80558ef7, 0x82938cb3, 0x2ec0e1d6, 
	0x80044422, 0xd1e47051, 0x720fc6ff, 0x82b20316, 0x0d527b02, 0x63049a15, 0x7ad5b9ad, 0xd2a4641d, 
	0x41144f86, 0x7b04917a, 0x15c4a2c0, 0x9da07916, 0x211df54a, 0x7fdd09af, 0xfe924f3f, 0x7e132cfe, 
	0x9a1d18d6, 0x7c56508b, 0x80f0f0af, 0x8095ced6, 0x8037d0d7, 0x026719d1, 0xa55fec43, 0x2b1c7cb7, 
	0xa5cd5ac1, 0x77639fad, 0x7fcd8b62, 0x81a18c27, 0xaee4912e, 0xeae9eebe, 0xeb3081de, 0x8532aada, 
	0xc822362e, 0x86a649a9, 0x8031a71d, 0x7b319dc6, 0xea8022e6, 0x814bc5a9, 0x8f62f7a1, 0xa430ea17, 
	0x388deafb, 0x883b5185, 0x776fe13c, 0x801c683f, 0x87c11b98, 0xb7cbc644, 0x8e9ad3e8, 0x3cf5a10c, 
	0x7ff6a634, 0x949ef096, 0x9f84aa7c, 0x010af13f, 0x782d1de8, 0xf18e492a, 0x6cf63b01, 0x4301cd81, 
	0x32d15c9e, 0x68ad8cef, 0xd09bd2d6, 0x908c5c15, 0xd1e36260, 0x2c5bfdd0, 0x88765a99, 0x93deba1e, 
	0xac6ae342, 0xe865b84c, 0x0f4f2847, 0x7fdf0499, 0x78b1c9b3, 0x6a73261e, 0x601a96f6, 0xd2847933, 
	0x489aa888, 0xe12e8093, 0x3bfa5a5f, 0xd96ba5f7, 0x7c8f4c8d, 0x80940c6f, 0xcef9dd1a, 0x7e1a055f, 
	0x3483558b, 0x02b59cc4, 0x0c56333e, 0x05a5b813, 0x92d66287, 0x7516b679, 0x71bfe03f, 0x8056bf68, 
	0xc24d0724, 0x8416bcf3, 0x234afbdb, 0x4b0d6f9c, 0xaba97333, 0x4b4f42b6, 0x7e8343ab, 0x7ffe2603, 
	0xe590f73c, 0x45e10c76, 0xb07a6a78, 0xb35609d3, 0x1a027dfd, 0x90cb6e20, 0x82d3fe38, 0x7b409257, 
	0x0e395afa, 0x1b802093, 0xcb0c6c59, 0x241e17e7, 0x1ee3ea0a, 0x41a82302, 0xab04350a, 0xf570beb7, 
	0xbb444b9b, 0x83021459, 0x838d65dc, 0x1c439c84, 0x6fdcc454, 0xef9ef325, 0x18626c1c, 0x020d251f, 
	0xc4aae786, 0x8614cb48, 0xf6f53ca6, 0x8710dbab, 0x89abec0d, 0xf29d41c1, 0x94b50336, 0xfdd49178, 
	0x604658d1, 0x800e85be, 0xca1bb079, 0x7fa48eeb, 0xa3b7fafe, 0xd330436b, 0x64eb604c, 0x43a658ae, 
	0x7caa1337, 0xddd445e6, 0x7efbf955, 0xb706ec71, 0x624a6b53, 0x9e0e231f, 0x97097248, 0xa1e1a17a, 
	0x68dd2e44, 0x7f9d2e14, 0xddcc7074, 0x58324197, 0xc88fc426, 0x6d3640ae, 0x7ef83600, 0x759a0270, 
	0x98b6d854, 0xd63c9b84, 0x372474a2, 0xe3f18cfd, 0x56ab0bdb, 0x85c9be7e, 0x47dfcfeb, 0xa5830d41, 
	0x0ddd6283, 0xf4f480ad, 0x74c60e38, 0xab8943c3, 0xc1508fe7, 0x480cdc39, 0x8e097362, 0xa44793be, 
	0x538b7e18, 0x545f5b41, 0x56529175, 0x9771a97e, 0xc2da7421, 0xea8265f2, 0x805d1163, 0x883c5d28, 
	0x8ba94c48, 0x4f676e65, 0xf78735b3, 0xe1853671, 0x7f454f53, 0x18147f85, 0x7d09e15d, 0xdb4f3494, 
	0x795c8973, 0x83310632, 0x85d8061c, 0x9a1a0ebf, 0xc125583c, 0x2a1b1a95, 0x7fd9103f, 0x71e98c72, 
	0x40932ed7, 0x91ed227a, 0x3c5e560e, 0xe816dee9, 0xb0891b80, 0x600038ba, 0xc7d9a80d, 0x7fff5e09, 
	0x7e3f4351, 0xbb6b4424, 0xb14448d4, 0x8d6bb7e1, 0xfb153626, 0xa68ad537, 0xd9782006, 0xf62f6991, 
	0x359ba8c1, 0x02ccff0b, 0x91bf2256, 0x7ea71c4d, 0x560ce5df, 0xeeba289b, 0xa574c4e7, 0x9e04f6ee, 
	0x7860a5ec, 0x0b8db4a2, 0x968ba3d7, 0x0b6c77df, 0xd6f3157d, 0x402eff1a, 0x49b820b3, 0x8152aebb, 
	0xd180b0b6, 0x098604d4, 0x7ff92224, 0xede9c996, 0x89c58061, 0x829624c4, 0xc6e71ea7, 0xba94d915, 
	0x389c3cf6, 0x5b4c5a06, 0x04b335e6, 0x516a8aab, 0x42c8d7d9, 0x92b12af6, 0x86c8549f, 0xfda98acf, 
	0x819673b6, 0x69545dac, 0x6feaa230, 0x726e6d3f, 0x886ebdfe, 0x34f5730a, 0x7af63ba2, 0x77307bbf, 
	0x7cd80630, 0x6e45efe0, 0x7f8ad7eb, 0x59d7df99, 0x86c70946, 0xda233629, 0x753f6cbf, 0x825eeb40, 
};



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * February 2005
 *
 * sbrfft.c - optimized FFT for SBR QMF filters
 **************************************************************************************/

//#include "sbr.h"
//#include "assembly.h"

#define SQRT1_2	0x5a82799a

/* swap RE{p0} with RE{p1} and IM{P0} with IM{P1} */
#define swapcplx(p0,p1) \
	t = p0; t1 = *(&(p0)+1); p0 = p1; *(&(p0)+1) = *(&(p1)+1); p1 = t; *(&(p1)+1) = t1

/* nfft = 32, hard coded since small, fixed size FFT
static const unsigned char bitrevtab32[9] = {
	0x01, 0x04, 0x03, 0x06, 0x00, 0x02, 0x05, 0x07, 0x00,
};
*/

/* twiddle table for radix 4 pass, format = Q31 */
static const int twidTabOdd32[8*6] = {
	0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x40000000, 0x00000000, 0x539eba45, 0xe7821d59, 
	0x4b418bbe, 0xf383a3e2, 0x58c542c5, 0xdc71898d, 0x5a82799a, 0xd2bec333, 0x539eba45, 0xe7821d59, 
	0x539eba45, 0xc4df2862, 0x539eba45, 0xc4df2862, 0x58c542c5, 0xdc71898d, 0x3248d382, 0xc13ad060, 
	0x40000000, 0xc0000000, 0x5a82799a, 0xd2bec333, 0x00000000, 0xd2bec333, 0x22a2f4f8, 0xc4df2862, 
	0x58c542c5, 0xcac933ae, 0xcdb72c7e, 0xf383a3e2, 0x00000000, 0xd2bec333, 0x539eba45, 0xc4df2862, 
	0xac6145bb, 0x187de2a7, 0xdd5d0b08, 0xe7821d59, 0x4b418bbe, 0xc13ad060, 0xa73abd3b, 0x3536cc52, 
};

/**************************************************************************************
 * Function:    BitReverse32
 *
 * Description: Ken's fast in-place bit reverse
 *
 * Inputs:      buffer of 32 complex samples
 *
 * Outputs:     bit-reversed samples in same buffer
 *
 * Return:      none
**************************************************************************************/
static void BitReverse32(int *inout)
{
	int t, t1;

	swapcplx(inout[2],  inout[32]);
	swapcplx(inout[4],  inout[16]);
	swapcplx(inout[6],  inout[48]);
	swapcplx(inout[10], inout[40]);
	swapcplx(inout[12], inout[24]);
	swapcplx(inout[14], inout[56]);
	swapcplx(inout[18], inout[36]);
	swapcplx(inout[22], inout[52]);
	swapcplx(inout[26], inout[44]);
	swapcplx(inout[30], inout[60]);
	swapcplx(inout[38], inout[50]);
	swapcplx(inout[46], inout[58]);
}

/**************************************************************************************
 * Function:    R8FirstPass32
 *
 * Description: radix-8 trivial pass for decimation-in-time FFT (log2(N) = 5)
 *
 * Inputs:      buffer of (bit-reversed) samples
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       assumes 3 guard bits, gains 1 integer bit
 *              guard bits out = guard bits in - 3 (if inputs are full scale)
 *                or guard bits in - 2 (if inputs bounded to +/- sqrt(2)/2)
 *              see scaling comments in fft.c for base AAC
 *              should compile with no stack spills on ARM (verify compiled output)
 *              current instruction count (per pass): 16 LDR, 16 STR, 4 SMULL, 61 ALU
 **************************************************************************************/
static void R8FirstPass32(int *r0)
{
	int r1, r2, r3, r4, r5, r6, r7;
	int r8, r9, r10, r11, r12, r14;

	/* number of passes = fft size / 8 = 32 / 8 = 4 */
	r1 = (32 >> 3);
	do {

		r2 = r0[8];
		r3 = r0[9];
		r4 = r0[10];
		r5 = r0[11];
		r6 = r0[12];
		r7 = r0[13];
		r8 = r0[14];
		r9 = r0[15];

		r10 = r2 + r4;
		r11 = r3 + r5;
		r12 = r6 + r8;
		r14 = r7 + r9;

		r2 -= r4;
		r3 -= r5;
		r6 -= r8;
		r7 -= r9;

		r4 = r2 - r7;
		r5 = r2 + r7;
		r8 = r3 - r6;
		r9 = r3 + r6;

		r2 = r4 - r9;
		r3 = r4 + r9;
		r6 = r5 - r8;
		r7 = r5 + r8;

		r2 = MULSHIFT32(SQRT1_2, r2);	/* can use r4, r5, r8, or r9 for constant and lo32 scratch reg */
		r3 = MULSHIFT32(SQRT1_2, r3);
		r6 = MULSHIFT32(SQRT1_2, r6);
		r7 = MULSHIFT32(SQRT1_2, r7);

		r4 = r10 + r12;
		r5 = r10 - r12;
		r8 = r11 + r14;
		r9 = r11 - r14;
	
		r10 = r0[0];
		r11 = r0[2];
		r12 = r0[4];
		r14 = r0[6];

		r10 += r11;
		r12 += r14;

		r4 >>= 1;
		r10 += r12;
		r4 += (r10 >> 1);
		r0[ 0] = r4;
		r4 -= (r10 >> 1);
		r4 = (r10 >> 1) - r4;
		r0[ 8] = r4;

		r9 >>= 1;
		r10 -= 2*r12;
		r4 = (r10 >> 1) + r9;
		r0[ 4] = r4;
		r4 = (r10 >> 1) - r9;
		r0[12] = r4;
		r10 += r12;

		r10 -= 2*r11;
		r12 -= 2*r14;

		r4 =  r0[1];
		r9 =  r0[3];
		r11 = r0[5];
		r14 = r0[7];

		r4 += r9;
		r11 += r14;

		r8 >>= 1;
		r4 += r11;
		r8 += (r4 >> 1);
		r0[ 1] = r8;
		r8 -= (r4 >> 1);
		r8 = (r4 >> 1) - r8;
		r0[ 9] = r8;

		r5 >>= 1;
		r4 -= 2*r11;
		r8 = (r4 >> 1) - r5;
		r0[ 5] = r8;
		r8 = (r4 >> 1) + r5;
		r0[13] = r8;
		r4 += r11;

		r4 -= 2*r9;
		r11 -= 2*r14;

		r9 = r10 - r11;
		r10 += r11;
		r14 = r4 + r12;
		r4 -= r12;

		r5 = (r10 >> 1) + r7;
		r8 = (r4 >> 1) - r6;
		r0[ 2] = r5;
		r0[ 3] = r8;

		r5 = (r9 >> 1) - r2;
		r8 = (r14 >> 1) - r3;
		r0[ 6] = r5;
		r0[ 7] = r8;

		r5 = (r10 >> 1) - r7;
		r8 = (r4 >> 1) + r6;
		r0[10] = r5;
		r0[11] = r8;
		
		r5 = (r9 >> 1) + r2;
		r8 = (r14 >> 1) + r3;
		r0[14] = r5;
		r0[15] = r8;

		r0 += 16;
		r1--;
	} while (r1 != 0);
}

/**************************************************************************************
 * Function:    R4Core32
 *
 * Description: radix-4 pass for 32-point decimation-in-time FFT
 *
 * Inputs:      buffer of samples
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       gain 2 integer bits
 *              guard bits out = guard bits in - 1 (if inputs are full scale)
 *              see scaling comments in fft.c for base AAC
 *              uses 3-mul, 3-add butterflies instead of 4-mul, 2-add
 *              should compile with no stack spills on ARM (verify compiled output)
 *              current instruction count (per pass): 16 LDR, 16 STR, 4 SMULL, 61 ALU
 **************************************************************************************/
static void R4Core32(int *r0)
{
	int r2, r3, r4, r5, r6, r7;
	int r8, r9, r10, r12, r14;
	int *r1;

	r1 = (int *)twidTabOdd32;
	r10 = 8;
	do {
		/* can use r14 for lo32 scratch register in all MULSHIFT32 */
		r2 = r1[0];
		r3 = r1[1];
		r4 = r0[16];
		r5 = r0[17];
		r12 = r4 + r5;
		r12 = MULSHIFT32(r3, r12);
		r5  = MULSHIFT32(r2, r5) + r12;
		r2 += 2*r3;
		r4  = MULSHIFT32(r2, r4) - r12;	

		r2 = r1[2];
		r3 = r1[3];
		r6 = r0[32];
		r7 = r0[33];
		r12 = r6 + r7;
		r12 = MULSHIFT32(r3, r12);
		r7  = MULSHIFT32(r2, r7) + r12;
		r2 += 2*r3;
		r6  = MULSHIFT32(r2, r6) - r12;
		
		r2 = r1[4];
		r3 = r1[5];
		r8 = r0[48];
		r9 = r0[49];
		r12 = r8 + r9;
		r12 = MULSHIFT32(r3, r12);
		r9  = MULSHIFT32(r2, r9) + r12;
		r2 += 2*r3;
		r8  = MULSHIFT32(r2, r8) - r12;

		r2 = r0[0];
		r3 = r0[1];

		r12 = r6 + r8;
		r8  = r6 - r8;
		r14 = r9 - r7;
		r9  = r9 + r7;

		r6 = (r2 >> 2) - r4;
		r7 = (r3 >> 2) - r5;
		r4 += (r2 >> 2);
		r5 += (r3 >> 2);

		r2 = r4 + r12;
		r3 = r5 + r9;
		r0[0] = r2;
		r0[1] = r3;
		r2 = r6 - r14;
		r3 = r7 - r8;
		r0[16] = r2;
		r0[17] = r3;
		r2 = r4 - r12;
		r3 = r5 - r9;
		r0[32] = r2;
		r0[33] = r3;
		r2 = r6 + r14;
		r3 = r7 + r8;
		r0[48] = r2;
		r0[49] = r3;

		r0 += 2;
		r1 += 6;
		r10--;
	} while (r10 != 0);
}

/**************************************************************************************
 * Function:    FFT32C
 *
 * Description: Ken's very fast in-place radix-4 decimation-in-time FFT
 *
 * Inputs:      buffer of 32 complex samples (before bit-reversal)
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       assumes 3 guard bits in, gains 3 integer bits
 *              guard bits out = guard bits in - 2
 *              (guard bit analysis includes assumptions about steps immediately
 *               before and after, i.e. PreMul and PostMul for DCT)
 **************************************************************************************/
void FFT32C(int *x)
{
	/* decimation in time */
	BitReverse32(x);

	/* 32-point complex FFT */
	R8FirstPass32(x);	/* gain 1 int bit,  lose 2 GB (making assumptions about input) */
	R4Core32(x);		/* gain 2 int bits, lose 0 GB (making assumptions about input) */
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrfreq.c - frequency band table calculation for SBR
 **************************************************************************************/

//#include "sbr.h"
//#include "assembly.h"

/**************************************************************************************
 * Function:    BubbleSort
 *
 * Description: in-place sort of unsigned chars
 *
 * Inputs:      buffer of elements to sort
 *              number of elements to sort
 *
 * Outputs:     sorted buffer
 *
 * Return:      none
 **************************************************************************************/
static void BubbleSort(unsigned char *v, int nItems)
{
	int i;
	unsigned char t;

	while (nItems >= 2) {
		for (i = 0; i < nItems-1; i++) {
			if (v[i+1] < v[i]) {
				t = v[i+1];	
				v[i+1] = v[i];	
				v[i] = t;
			}
		}
		nItems--;
	}
}

/**************************************************************************************
 * Function:    VMin
 *
 * Description: find smallest element in a buffer of unsigned chars
 *
 * Inputs:      buffer of elements to search
 *              number of elements to search
 *
 * Outputs:     none
 *
 * Return:      smallest element in buffer
 **************************************************************************************/
static unsigned char VMin(unsigned char *v, int nItems)
{
	int i;
	unsigned char vMin;

	vMin = v[0];
	for (i = 1; i < nItems; i++) {
		if (v[i] < vMin)
			vMin = v[i];
	}
	return vMin;
}

/**************************************************************************************
 * Function:    VMax
 *
 * Description: find largest element in a buffer of unsigned chars
 *
 * Inputs:      buffer of elements to search
 *              number of elements to search
 *
 * Outputs:     none
 *
 * Return:      largest element in buffer
 **************************************************************************************/
static unsigned char VMax(unsigned char *v, int nItems)
{
	int i;
	unsigned char vMax;

	vMax = v[0];
	for (i = 1; i < nItems; i++) {
		if (v[i] > vMax)
			vMax = v[i];
	}
	return vMax;
}

/**************************************************************************************
 * Function:    CalcFreqMasterScaleZero
 *
 * Description: calculate master frequency table when freqScale == 0 
 *                (4.6.18.3.2.1, figure 4.39)
 *
 * Inputs:      alterScale flag
 *              index of first QMF subband in master freq table (k0)
 *              index of last QMF subband (k2)
 *
 * Outputs:     master frequency table
 *
 * Return:      number of bands in master frequency table
 *
 * Notes:       assumes k2 - k0 <= 48 and k2 >= k0 (4.6.18.3.6)
 **************************************************************************************/
static int CalcFreqMasterScaleZero(unsigned char *freqMaster, int alterScale, int k0, int k2)
{
	int nMaster, k, nBands, k2Achieved, dk, vDk[64], k2Diff;

	if (alterScale) {
		dk = 2;
		nBands = 2 * ((k2 - k0 + 2) >> 2);
	} else {
		dk = 1;
		nBands = 2 * ((k2 - k0) >> 1);
	}

	if (nBands <= 0)
		return 0;

	k2Achieved = k0 + nBands * dk;
	k2Diff = k2 - k2Achieved;
	for (k = 0; k < nBands; k++)
		vDk[k] = dk;

	if (k2Diff > 0) {
		k = nBands - 1;
		while (k2Diff) {
			vDk[k]++;
			k--;
			k2Diff--;
		}
	} else if (k2Diff < 0) {
		k = 0;
		while (k2Diff) {
			vDk[k]--;
			k++;
			k2Diff++;
		}
	}

	nMaster = nBands;
	freqMaster[0] = k0;
	for (k = 1; k <= nBands; k++)
		freqMaster[k] = freqMaster[k-1] + vDk[k-1];

	return nMaster;
}

/* mBandTab[i] = temp1[i] / 2 */
static const int mBandTab[3] = {6, 5, 4};

/* invWarpTab[i] = 1.0 / temp2[i], Q30 (see 4.6.18.3.2.1) */
static const int invWarpTab[2] = {0x40000000, 0x313b13b1};

/**************************************************************************************
 * Function:    CalcFreqMasterScale
 *
 * Description: calculate master frequency table when freqScale > 0 
 *                (4.6.18.3.2.1, figure 4.39)
 *
 * Inputs:      alterScale flag
 *              freqScale flag
 *              index of first QMF subband in master freq table (k0)
 *              index of last QMF subband (k2)
 *
 * Outputs:     master frequency table
 *
 * Return:      number of bands in master frequency table
 *
 * Notes:       assumes k2 - k0 <= 48 and k2 >= k0 (4.6.18.3.6)
 **************************************************************************************/
static int CalcFreqMaster(unsigned char *freqMaster, int freqScale, int alterScale, int k0, int k2)
{
	int bands, twoRegions, k, k1, t, vLast, vCurr, pCurr;
	int invWarp, nBands0, nBands1, change;
	unsigned char vDk1Min, vDk0Max;
	unsigned char *vDelta;

	if (freqScale < 1 || freqScale > 3)
		return -1;

	bands = mBandTab[freqScale - 1];
	invWarp = invWarpTab[alterScale];

	/* tested for all k0 = [5, 64], k2 = [k0, 64] */
	if (k2*10000 > 22449*k0) {
		twoRegions = 1;
		k1 = 2*k0;
	} else {
		twoRegions = 0;
		k1 = k2;
	}
	
	/* tested for all k0 = [5, 64], k1 = [k0, 64], freqScale = [1,3] */
	t = (log2Tab[k1] - log2Tab[k0]) >> 3;				/* log2(k1/k0), Q28 to Q25 */
	nBands0 = 2 * (((bands * t) + (1 << 24)) >> 25);	/* multiply by bands/2, round to nearest int (mBandTab has factor of 1/2 rolled in) */

	/* tested for all valid combinations of k0, k1, nBands (from sampRate, freqScale, alterScale) 
	 * roundoff error can be a problem with fixpt (e.g. pCurr = 12.499999 instead of 12.50003)
	 *   because successive multiplication always undershoots a little bit, but this
	 *   doesn't occur in any of the ratios we encounter from the valid k0/k1 bands in the spec
	 */
	t = RatioPowInv(k1, k0, nBands0);
	pCurr = k0 << 24;
	vLast = k0;
	vDelta = freqMaster + 1;	/* operate in-place */
	for (k = 0; k < nBands0; k++) {
		pCurr = MULSHIFT32(pCurr, t) << 8;	/* keep in Q24 */
		vCurr = (pCurr + (1 << 23)) >> 24;
		vDelta[k] = (vCurr - vLast);
		vLast = vCurr;
	}

	/* sort the deltas and find max delta for first region */
	BubbleSort(vDelta, nBands0);
	vDk0Max = VMax(vDelta, nBands0);

	/* fill master frequency table with bands from first region */
	freqMaster[0] = k0;
	for (k = 1; k <= nBands0; k++)
		freqMaster[k] += freqMaster[k-1];

	/* if only one region, then the table is complete */
	if (!twoRegions)
		return nBands0;

	/* tested for all k1 = [10, 64], k2 = [k0, 64], freqScale = [1,3] */
	t = (log2Tab[k2] - log2Tab[k1]) >> 3;		/* log2(k1/k0), Q28 to Q25 */
	t = MULSHIFT32(bands * t, invWarp) << 2;	/* multiply by bands/2, divide by warp factor, keep Q25 */
	nBands1 = 2 * ((t + (1 << 24)) >> 25);		/* round to nearest int */
				
	/* see comments above for calculations in first region */
	t = RatioPowInv(k2, k1, nBands1);
	pCurr = k1 << 24;
	vLast = k1;
	vDelta = freqMaster + nBands0 + 1;	/* operate in-place */
	for (k = 0; k < nBands1; k++) {
		pCurr = MULSHIFT32(pCurr, t) << 8;	/* keep in Q24 */
		vCurr = (pCurr + (1 << 23)) >> 24;
		vDelta[k] = (vCurr - vLast);
		vLast = vCurr;
	}

	/* sort the deltas, adjusting first and last if the second region has smaller deltas than the first */
	vDk1Min = VMin(vDelta, nBands1);
	if (vDk1Min < vDk0Max) {
		BubbleSort(vDelta, nBands1);
		change = vDk0Max - vDelta[0];
		if (change > ((vDelta[nBands1 - 1] - vDelta[0]) >> 1))
			 change = ((vDelta[nBands1 - 1] - vDelta[0]) >> 1);
		vDelta[0] += change;
		vDelta[nBands1-1] -= change;
	}
	BubbleSort(vDelta, nBands1);

	/* fill master frequency table with bands from second region 
	 * Note: freqMaster[nBands0] = k1
	 */
	for (k = 1; k <= nBands1; k++)
		freqMaster[k + nBands0] += freqMaster[k + nBands0 - 1];

	return (nBands0 + nBands1);
}

/**************************************************************************************
 * Function:    CalcFreqHigh
 *
 * Description: calculate high resolution frequency table (4.6.18.3.2.2)
 *
 * Inputs:      master frequency table
 *              number of bands in master frequency table 
 *              crossover band from header
 *
 * Outputs:     high resolution frequency table
 *
 * Return:      number of bands in high resolution frequency table
 **************************************************************************************/
static int CalcFreqHigh(unsigned char *freqHigh, unsigned char *freqMaster, int nMaster, int crossOverBand)
{
	int k, nHigh;

	nHigh = nMaster - crossOverBand;

	for (k = 0; k <= nHigh; k++)
		freqHigh[k] = freqMaster[k + crossOverBand];
	
	return nHigh;
}

/**************************************************************************************
 * Function:    CalcFreqLow
 *
 * Description: calculate low resolution frequency table (4.6.18.3.2.2)
 *
 * Inputs:      high resolution frequency table
 *              number of bands in high resolution frequency table 
 *
 * Outputs:     low resolution frequency table
 *
 * Return:      number of bands in low resolution frequency table
 **************************************************************************************/
static int CalcFreqLow(unsigned char *freqLow, unsigned char *freqHigh, int nHigh)
{
	int k, nLow, oddFlag;

	nLow = nHigh - (nHigh >> 1);
	freqLow[0] = freqHigh[0];
	oddFlag = nHigh & 0x01;

	for (k = 1; k <= nLow; k++)
		freqLow[k] = freqHigh[2*k - oddFlag];

	return nLow;
}

/**************************************************************************************
 * Function:    CalcFreqNoise
 *
 * Description: calculate noise floor frequency table (4.6.18.3.2.2)
 *
 * Inputs:      low resolution frequency table
 *              number of bands in low resolution frequency table
 *              index of starting QMF subband for SBR (kStart)
 *              index of last QMF subband (k2)
 *              number of noise bands
 *
 * Outputs:     noise floor frequency table
 *
 * Return:      number of bands in noise floor frequency table
 **************************************************************************************/
static int CalcFreqNoise(unsigned char *freqNoise, unsigned char *freqLow, int nLow, int kStart, int k2, int noiseBands)
{
	int i, iLast, k, nQ, lTop, lBottom;

	lTop = log2Tab[k2];
	lBottom = log2Tab[kStart];
	nQ = noiseBands*((lTop - lBottom) >> 2);	/* Q28 to Q26, noiseBands = [0,3] */
	nQ = (nQ + (1 << 25)) >> 26;
	if (nQ < 1)
		nQ = 1;

	ASSERT(nQ <= MAX_NUM_NOISE_FLOOR_BANDS);	/* required from 4.6.18.3.6 */

	iLast = 0;
	freqNoise[0] = freqLow[0];
	for (k = 1; k <= nQ; k++) {
		i = iLast + (nLow - iLast) / (nQ + 1 - k);	/* truncating division */
		freqNoise[k] = freqLow[i];
		iLast = i;
	}

	return nQ;
}

/**************************************************************************************
 * Function:    BuildPatches
 *
 * Description: build high frequency patches (4.6.18.6.3)
 *
 * Inputs:      master frequency table
 *              number of bands in low resolution frequency table
 *              index of first QMF subband in master freq table (k0)
 *              index of starting QMF subband for SBR (kStart)
 *              number of QMF bands in high resolution frequency table
 *              sample rate index
 *
 * Outputs:     starting subband for each patch
 *              number of subbands in each patch
 *
 * Return:      number of patches
 **************************************************************************************/
static int BuildPatches(unsigned char *patchNumSubbands, unsigned char *patchStartSubband, unsigned char *freqMaster, 
						int nMaster, int k0, int kStart, int numQMFBands, int sampRateIdx)
{
	int i, j, k;
	int msb, sb, usb, numPatches, goalSB, oddFlag;

	msb = k0;
	usb = kStart;
	numPatches = 0;
	goalSB = goalSBTab[sampRateIdx];

	if (nMaster == 0) {
		patchNumSubbands[0] = 0;
		patchStartSubband[0] = 0;
		return 0;
	}

	if (goalSB < kStart + numQMFBands) {
		k = 0;
		for (i = 0; freqMaster[i] < goalSB; i++)
			k = i+1;
	} else {
		k = nMaster;
	}

	do {
		j = k+1;
		do {
			j--;
			sb = freqMaster[j];
			oddFlag = (sb - 2 + k0) & 0x01;
		} while (sb > k0 - 1 + msb - oddFlag);

		patchNumSubbands[numPatches] = MAX(sb - usb, 0);
		patchStartSubband[numPatches] = k0 - oddFlag - patchNumSubbands[numPatches];

		/* from MPEG reference code - slightly different from spec */
		if ((patchNumSubbands[numPatches] < 3) && (numPatches > 0))
			break;

		if (patchNumSubbands[numPatches] > 0) {
			usb = sb;
			msb = sb;
			numPatches++;
		} else {
			msb = kStart;
		}

		if (freqMaster[k] - sb < 3)
			k = nMaster;

	} while (sb != (kStart + numQMFBands) && numPatches <= MAX_NUM_PATCHES);

	return numPatches;
}

/**************************************************************************************
 * Function:    FindFreq
 *
 * Description: search buffer of unsigned chars for a specific value
 *
 * Inputs:      buffer of elements to search
 *              number of elements to search
 *              value to search for
 *
 * Outputs:     none
 *
 * Return:      non-zero if the value is found anywhere in the buffer, zero otherwise
 **************************************************************************************/
static int FindFreq(unsigned char *freq, int nFreq, unsigned char val)
{
	int k;

	for (k = 0; k < nFreq; k++) {
		if (freq[k] == val)
			return 1;
	}

	return 0;
}

/**************************************************************************************
 * Function:    RemoveFreq
 *
 * Description: remove one element from a buffer of unsigned chars
 *
 * Inputs:      buffer of elements
 *              number of elements
 *              index of element to remove
 *
 * Outputs:     new buffer of length nFreq-1
 *
 * Return:      none
 **************************************************************************************/
static void RemoveFreq(unsigned char *freq, int nFreq, int removeIdx)
{
	int k;

	if (removeIdx >= nFreq)
		return;

	for (k = removeIdx; k < nFreq - 1; k++)
		freq[k] = freq[k+1];
}

/**************************************************************************************
 * Function:    CalcFreqLimiter
 *
 * Description: calculate limiter frequency table (4.6.18.3.2.3)
 *
 * Inputs:      number of subbands in each patch
 *              low resolution frequency table
 *              number of bands in low resolution frequency table
 *              index of starting QMF subband for SBR (kStart)
 *              number of limiter bands
 *              number of patches
 *
 * Outputs:     limiter frequency table
 *
 * Return:      number of bands in limiter frequency table
 **************************************************************************************/
static int CalcFreqLimiter(unsigned char *freqLimiter, unsigned char *patchNumSubbands, unsigned char *freqLow, 
						   int nLow, int kStart, int limiterBands, int numPatches)
{
	int k, bands, nLimiter, nOctaves;
	int limBandsPerOctave[3] = {120, 200, 300};		/* [1.2, 2.0, 3.0] * 100 */
	unsigned char patchBorders[MAX_NUM_PATCHES + 1];

	/* simple case */
	if (limiterBands == 0) {
		freqLimiter[0] = freqLow[0] - kStart;
		freqLimiter[1] = freqLow[nLow] - kStart;
		return 1;
	}

	bands = limBandsPerOctave[limiterBands - 1];
	patchBorders[0] = kStart;

	/* from MPEG reference code - slightly different from spec (top border) */
	for (k = 1; k < numPatches; k++)
		patchBorders[k] = patchBorders[k-1] + patchNumSubbands[k-1];
	patchBorders[k] = freqLow[nLow];

	for (k = 0; k <= nLow; k++)
		freqLimiter[k] = freqLow[k];

	for (k = 1; k < numPatches; k++)
		freqLimiter[k+nLow] = patchBorders[k];

	k = 1;
	nLimiter = nLow + numPatches - 1;
	BubbleSort(freqLimiter, nLimiter + 1);

	while (k <= nLimiter) {
		nOctaves = log2Tab[freqLimiter[k]] - log2Tab[freqLimiter[k-1]];	/* Q28 */
		nOctaves = (nOctaves >> 9) * bands;	/* Q19, max bands = 300 < 2^9 */
		if (nOctaves < (49 << 19)) {		/* compare with 0.49*100, in Q19 */
			if (freqLimiter[k] == freqLimiter[k-1] || FindFreq(patchBorders, numPatches + 1, freqLimiter[k]) == 0) {
				RemoveFreq(freqLimiter, nLimiter + 1, k);
				nLimiter--;
			} else if (FindFreq(patchBorders, numPatches + 1, freqLimiter[k-1]) == 0) {
				RemoveFreq(freqLimiter, nLimiter + 1, k-1);
				nLimiter--;
			} else {
				k++;
			}
		} else {
			k++;
		}
	}

	/* store limiter boundaries as offsets from kStart */
	for (k = 0; k <= nLimiter; k++)
		freqLimiter[k] -= kStart;

	return nLimiter;
}

/**************************************************************************************
 * Function:    CalcFreqTables
 *
 * Description: calulate master and derived frequency tables, and patches
 *
 * Inputs:      initialized SBRHeader struct for this SCE/CPE block
 *              initialized SBRFreq struct for this SCE/CPE block
 *              sample rate index of output sample rate (after SBR)
 *
 * Outputs:     master and derived frequency tables, and patches
 *
 * Return:      non-zero if error, zero otherwise
 **************************************************************************************/
int CalcFreqTables(SBRHeader *sbrHdr, SBRFreq *sbrFreq, int sampRateIdx)
{
	int k0, k2;

	k0 = k0Tab[sampRateIdx][sbrHdr->startFreq];

	if (sbrHdr->stopFreq == 14)
		k2 = 2*k0;
	else if (sbrHdr->stopFreq == 15)
		k2 = 3*k0;
	else
		k2 = k2Tab[sampRateIdx][sbrHdr->stopFreq];
	if (k2 > 64)
		k2 = 64;

	/* calculate master frequency table */
	if (sbrHdr->freqScale == 0)
		sbrFreq->nMaster = CalcFreqMasterScaleZero(sbrFreq->freqMaster, sbrHdr->alterScale, k0, k2);
	else
		sbrFreq->nMaster = CalcFreqMaster(sbrFreq->freqMaster, sbrHdr->freqScale, sbrHdr->alterScale, k0, k2);

	/* calculate high frequency table and related parameters */
	sbrFreq->nHigh = CalcFreqHigh(sbrFreq->freqHigh, sbrFreq->freqMaster, sbrFreq->nMaster, sbrHdr->crossOverBand);
	sbrFreq->numQMFBands = sbrFreq->freqHigh[sbrFreq->nHigh] - sbrFreq->freqHigh[0];
	sbrFreq->kStart = sbrFreq->freqHigh[0];

	/* calculate low frequency table */
	sbrFreq->nLow = CalcFreqLow(sbrFreq->freqLow, sbrFreq->freqHigh, sbrFreq->nHigh);

	/* calculate noise floor frequency table */
	sbrFreq->numNoiseFloorBands = CalcFreqNoise(sbrFreq->freqNoise, sbrFreq->freqLow, sbrFreq->nLow, sbrFreq->kStart, k2, sbrHdr->noiseBands);

	/* calculate limiter table */
	sbrFreq->numPatches = BuildPatches(sbrFreq->patchNumSubbands, sbrFreq->patchStartSubband, sbrFreq->freqMaster, 
		sbrFreq->nMaster, k0, sbrFreq->kStart, sbrFreq->numQMFBands, sampRateIdx);
	sbrFreq->nLimiter = CalcFreqLimiter(sbrFreq->freqLimiter, sbrFreq->patchNumSubbands, sbrFreq->freqLow, sbrFreq->nLow, sbrFreq->kStart,
		sbrHdr->limiterBands, sbrFreq->numPatches);

	return 0;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrhfadj.c - high frequency adjustment for SBR
 **************************************************************************************/

//#include "sbr.h"
//#include "assembly.h"

/* invBandTab[i] = 1.0 / (i + 1), Q31 */
static const int invBandTab[64] = {
	0x7fffffff, 0x40000000, 0x2aaaaaab, 0x20000000, 0x1999999a, 0x15555555, 0x12492492, 0x10000000, 
	0x0e38e38e, 0x0ccccccd, 0x0ba2e8ba, 0x0aaaaaab, 0x09d89d8a, 0x09249249, 0x08888889, 0x08000000, 
	0x07878788, 0x071c71c7, 0x06bca1af, 0x06666666, 0x06186186, 0x05d1745d, 0x0590b216, 0x05555555, 
	0x051eb852, 0x04ec4ec5, 0x04bda12f, 0x04924925, 0x0469ee58, 0x04444444, 0x04210842, 0x04000000, 
	0x03e0f83e, 0x03c3c3c4, 0x03a83a84, 0x038e38e4, 0x03759f23, 0x035e50d8, 0x03483483, 0x03333333, 
	0x031f3832, 0x030c30c3, 0x02fa0be8, 0x02e8ba2f, 0x02d82d83, 0x02c8590b, 0x02b93105, 0x02aaaaab, 
	0x029cbc15, 0x028f5c29, 0x02828283, 0x02762762, 0x026a439f, 0x025ed098, 0x0253c825, 0x02492492, 
	0x023ee090, 0x0234f72c, 0x022b63cc, 0x02222222, 0x02192e2a, 0x02108421, 0x02082082, 0x02000000, 
};

/**************************************************************************************
 * Function:    EstimateEnvelope
 *
 * Description: estimate power of generated HF QMF bands in one time-domain envelope
 *                (4.6.18.7.3)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRHeader struct for this SCE/CPE block
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              index of current envelope
 *
 * Outputs:     power of each QMF subband, stored as integer (Q0) * 2^N, N >= 0
 *
 * Return:      none
 **************************************************************************************/
static void EstimateEnvelope(PSInfoSBR *psi, SBRHeader *sbrHdr, SBRGrid *sbrGrid, SBRFreq *sbrFreq, int env)
{
	int i, m, iStart, iEnd, xre, xim, nScale, expMax;
	int p, n, mStart, mEnd, invFact, t;
	int *XBuf;
	U64 eCurr;
	unsigned char *freqBandTab;

	/* estimate current envelope */
	iStart = sbrGrid->envTimeBorder[env] + HF_ADJ;
	iEnd =   sbrGrid->envTimeBorder[env+1] + HF_ADJ;
	if (sbrGrid->freqRes[env]) {
		n = sbrFreq->nHigh;
		freqBandTab = sbrFreq->freqHigh;
	} else {
		n = sbrFreq->nLow;
		freqBandTab = sbrFreq->freqLow;
	}

	/* ADS should inline MADD64 (smlal) properly, but check to make sure */
	expMax = 0;
	if (sbrHdr->interpFreq) {
		for (m = 0; m < sbrFreq->numQMFBands; m++) {
			eCurr.w64 = 0;
			XBuf = psi->XBuf[iStart][sbrFreq->kStart + m];
			for (i = iStart; i < iEnd; i++) {
				/* scale to int before calculating power (precision not critical, and avoids overflow) */
				xre = (*XBuf) >> FBITS_OUT_QMFA;	XBuf += 1;
				xim = (*XBuf) >> FBITS_OUT_QMFA;	XBuf += (2*64 - 1);
				eCurr.w64 = MADD64(eCurr.w64, xre, xre);
				eCurr.w64 = MADD64(eCurr.w64, xim, xim);
			}

			/* eCurr.w64 is now Q(64 - 2*FBITS_OUT_QMFA) (64-bit word)
			 * if energy is too big to fit in 32-bit word (> 2^31) scale down by power of 2
			 */
			nScale = 0;
			if (eCurr.r.hi32) {
				nScale = (32 - CLZ(eCurr.r.hi32)) + 1;
				t  = (int)(eCurr.r.lo32 >> nScale);		/* logical (unsigned) >> */
				t |= eCurr.r.hi32 << (32 - nScale);
			} else if (eCurr.r.lo32 >> 31) {
				nScale = 1;
				t  = (int)(eCurr.r.lo32 >> nScale);		/* logical (unsigned) >> */
			} else {
				t  = (int)eCurr.r.lo32;
			}

			invFact = invBandTab[(iEnd - iStart)-1];
			psi->eCurr[m] = MULSHIFT32(t, invFact);
			psi->eCurrExp[m] = nScale + 1;	/* +1 for invFact = Q31 */
			if (psi->eCurrExp[m] > expMax)
				expMax = psi->eCurrExp[m];
		}
	} else {
		for (p = 0; p < n; p++) {
			mStart = freqBandTab[p];
			mEnd =   freqBandTab[p+1];
			eCurr.w64 = 0;
			for (i = iStart; i < iEnd; i++) {
				XBuf = psi->XBuf[i][mStart];
				for (m = mStart; m < mEnd; m++) {
					xre = (*XBuf++) >> FBITS_OUT_QMFA;
					xim = (*XBuf++) >> FBITS_OUT_QMFA;
					eCurr.w64 = MADD64(eCurr.w64, xre, xre);
					eCurr.w64 = MADD64(eCurr.w64, xim, xim);
				}
			}

			nScale = 0;
			if (eCurr.r.hi32) {
				nScale = (32 - CLZ(eCurr.r.hi32)) + 1;
				t  = (int)(eCurr.r.lo32 >> nScale);		/* logical (unsigned) >> */
				t |= eCurr.r.hi32 << (32 - nScale);
			} else if (eCurr.r.lo32 >> 31) {
				nScale = 1;
				t  = (int)(eCurr.r.lo32 >> nScale);		/* logical (unsigned) >> */
			} else {
				t  = (int)eCurr.r.lo32;
			}

			invFact = invBandTab[(iEnd - iStart)-1];
			invFact = MULSHIFT32(invBandTab[(mEnd - mStart)-1], invFact) << 1;
			t = MULSHIFT32(t, invFact);

			for (m = mStart; m < mEnd; m++) {
				psi->eCurr[m - sbrFreq->kStart] = t;
				psi->eCurrExp[m - sbrFreq->kStart] = nScale + 1;	/* +1 for invFact = Q31 */
			}
			if (psi->eCurrExp[mStart - sbrFreq->kStart] > expMax)
				expMax = psi->eCurrExp[mStart - sbrFreq->kStart];
		}
	}
	psi->eCurrExpMax = expMax;
}

/**************************************************************************************
 * Function:    GetSMapped
 *
 * Description: calculate SMapped (4.6.18.7.2)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current envelope
 *              index of current QMF band
 *              la flag for this envelope
 *
 * Outputs:     none
 *
 * Return:      1 if a sinusoid is present in this band, 0 if not
 **************************************************************************************/
static int GetSMapped(SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int env, int band, int la)
{
	int bandStart, bandEnd, oddFlag, r;

	if (sbrGrid->freqRes[env]) {
		/* high resolution */
		bandStart = band;
		bandEnd = band+1;
	} else {
		/* low resolution (see CalcFreqLow() for mapping) */
		oddFlag = sbrFreq->nHigh & 0x01;
		bandStart = (band > 0 ? 2*band - oddFlag : 0);		/* starting index for freqLow[band] */
		bandEnd = 2*(band+1) - oddFlag;						/* ending index for freqLow[band+1] */
	}

	/* sMapped = 1 if sIndexMapped == 1 for any frequency in this band */
	for (band = bandStart; band < bandEnd; band++) {
		if (sbrChan->addHarmonic[1][band]) {
			r = ((sbrFreq->freqHigh[band+1] + sbrFreq->freqHigh[band]) >> 1);
			if (env >= la || sbrChan->addHarmonic[0][r] == 1)
				return 1;
		}
	}
	return 0;
}

#define GBOOST_MAX	0x2830afd3	/* Q28, 1.584893192 squared */
#define	ACC_SCALE	6

/* squared version of table in 4.6.18.7.5 */
static const int limGainTab[4] = {0x20138ca7, 0x40000000, 0x7fb27dce, 0x80000000};	/* Q30 (0x80000000 = sentinel for GMAX) */

/**************************************************************************************
 * Function:    CalcMaxGain
 *
 * Description: calculate max gain in one limiter band (4.6.18.7.5)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRHeader struct for this SCE/CPE block
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              index of current channel (0 for SCE, 0 or 1 for CPE)
 *              index of current envelope
 *              index of current limiter band
 *              number of fraction bits in dequantized envelope 
 *                (max = Q(FBITS_OUT_DQ_ENV - 6) = Q23, can go negative)
 *
 * Outputs:     updated gainMax, gainMaxFBits, and sumEOrigMapped in PSInfoSBR struct
 *
 * Return:      none
 **************************************************************************************/
static void CalcMaxGain(PSInfoSBR *psi, SBRHeader *sbrHdr, SBRGrid *sbrGrid, SBRFreq *sbrFreq, int ch, int env, int lim, int fbitsDQ)
{
	int m, mStart, mEnd, q, z, r;
	int sumEOrigMapped, sumECurr, gainMax, eOMGainMax, envBand;
	unsigned char eCurrExpMax;
	unsigned char *freqBandTab;

	mStart = sbrFreq->freqLimiter[lim];   /* these are offsets from kStart */
	mEnd =   sbrFreq->freqLimiter[lim + 1];
	freqBandTab = (sbrGrid->freqRes[env] ? sbrFreq->freqHigh : sbrFreq->freqLow);

	/* calculate max gain to apply to signal in this limiter band */
	sumECurr = 0;
	sumEOrigMapped = 0;
	eCurrExpMax = psi->eCurrExpMax;
	eOMGainMax = psi->eOMGainMax;
	envBand = psi->envBand;
	for (m = mStart; m < mEnd; m++) {
		/* map current QMF band to appropriate envelope band */
		if (m == freqBandTab[envBand + 1] - sbrFreq->kStart) {
			envBand++;
			eOMGainMax = psi->envDataDequant[ch][env][envBand] >> ACC_SCALE;	/* summing max 48 bands */
		}
		sumEOrigMapped += eOMGainMax;

		/* easy test for overflow on ARM */
		sumECurr += (psi->eCurr[m] >> (eCurrExpMax - psi->eCurrExp[m]));
		if (sumECurr >> 30) {
			sumECurr >>= 1;
			eCurrExpMax++;
		}
	}
	psi->eOMGainMax = eOMGainMax;
	psi->envBand = envBand;

	psi->gainMaxFBits = 30;	/* Q30 tables */
	if (sumECurr == 0) {
		/* any non-zero numerator * 1/EPS_0 is > G_MAX */
		gainMax = (sumEOrigMapped == 0 ? limGainTab[sbrHdr->limiterGains] : 0x80000000);
	} else if (sumEOrigMapped == 0) {
		/* 1/(any non-zero denominator) * EPS_0 * limGainTab[x] is appx. 0 */
		gainMax = 0;
	} else {
		/* sumEOrigMapped = Q(fbitsDQ - ACC_SCALE), sumECurr = Q(-eCurrExpMax) */
		gainMax = limGainTab[sbrHdr->limiterGains];
		if (sbrHdr->limiterGains != 3) {
			q = MULSHIFT32(sumEOrigMapped, gainMax);	/* Q(fbitsDQ - ACC_SCALE - 2), gainMax = Q30  */
			z = CLZ(sumECurr) - 1;
			r = InvRNormalized(sumECurr << z);	/* in =  Q(z - eCurrExpMax), out = Q(29 + 31 - z + eCurrExpMax) */
			gainMax = MULSHIFT32(q, r);			/* Q(29 + 31 - z + eCurrExpMax + fbitsDQ - ACC_SCALE - 2 - 32) */
			psi->gainMaxFBits = 26 - z + eCurrExpMax + fbitsDQ - ACC_SCALE;
		}
	}
	psi->sumEOrigMapped = sumEOrigMapped;
	psi->gainMax = gainMax;
}

/**************************************************************************************
 * Function:    CalcNoiseDivFactors
 *
 * Description: calculate 1/(1+Q) and Q/(1+Q) (4.6.18.7.4; 4.6.18.7.5)
 *
 * Inputs:      dequantized noise floor scalefactor
 *
 * Outputs:     1/(1+Q) and Q/(1+Q), format = Q31
 *
 * Return:      none
 **************************************************************************************/
static void CalcNoiseDivFactors(int q, int *qp1Inv, int *qqp1Inv)
{
	int z, qp1, t, s;

	/* 1 + Q_orig */
	qp1  = (q >> 1);
	qp1 += (1 << (FBITS_OUT_DQ_NOISE - 1));		/* >> 1 to avoid overflow when adding 1.0 */
	z = CLZ(qp1) - 1;							/* z <= 31 - FBITS_OUT_DQ_NOISE */
	qp1 <<= z;									/* Q(FBITS_OUT_DQ_NOISE + z) = Q31 * 2^-(31 - (FBITS_OUT_DQ_NOISE + z)) */
	t = InvRNormalized(qp1) << 1;				/* Q30 * 2^(31 - (FBITS_OUT_DQ_NOISE + z)), guaranteed not to overflow */

	/* normalize to Q31 */
	s = (31 - (FBITS_OUT_DQ_NOISE - 1) - z - 1);	/* clearly z >= 0, z <= (30 - (FBITS_OUT_DQ_NOISE - 1)) */
	*qp1Inv = (t >> s);								/* s = [0, 31 - FBITS_OUT_DQ_NOISE] */
	*qqp1Inv = MULSHIFT32(t, q) << (32 - FBITS_OUT_DQ_NOISE - s);
}

/**************************************************************************************
 * Function:    CalcComponentGains
 *
 * Description: calculate gain of envelope, sinusoids, and noise in one limiter band
 *                (4.6.18.7.5)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRHeader struct for this SCE/CPE block
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current channel (0 for SCE, 0 or 1 for CPE)
 *              index of current envelope
 *              index of current limiter band
 *              number of fraction bits in dequantized envelope
 *
 * Outputs:     gains for envelope, sinusoids and noise
 *              number of fraction bits for envelope gain
 *              sum of the total gain for each component in this band
 *              other updated state variables
 *
 * Return:      none
 **************************************************************************************/
static void CalcComponentGains(PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch, int env, int lim, int fbitsDQ)
{
	int d, m, mStart, mEnd, q, qm, noiseFloor, sIndexMapped;
	int shift, eCurr, maxFlag, gainMax, gainMaxFBits;
	int gain, sm, z, r, fbitsGain, gainScale;
	unsigned char *freqBandTab;

	mStart = sbrFreq->freqLimiter[lim];   /* these are offsets from kStart */
	mEnd =   sbrFreq->freqLimiter[lim + 1];

	gainMax = psi->gainMax;
	gainMaxFBits = psi->gainMaxFBits;

	d = (env == psi->la || env == sbrChan->laPrev ? 0 : 1);
	freqBandTab = (sbrGrid->freqRes[env] ? sbrFreq->freqHigh : sbrFreq->freqLow);

	/* figure out which noise floor this envelope is in (only 1 or 2 noise floors allowed) */
	noiseFloor = 0;
	if (sbrGrid->numNoiseFloors == 2 && sbrGrid->noiseTimeBorder[1] <= sbrGrid->envTimeBorder[env])
		noiseFloor++;

	psi->sumECurrGLim = 0;
	psi->sumSM = 0;
	psi->sumQM = 0;
	/* calculate energy of noise to add in this limiter band */
	for (m = mStart; m < mEnd; m++) {
		if (m == sbrFreq->freqNoise[psi->noiseFloorBand + 1] - sbrFreq->kStart) {
			/* map current QMF band to appropriate noise floor band (NOTE: freqLimiter[0] == freqLow[0] = freqHigh[0]) */
			psi->noiseFloorBand++;
			CalcNoiseDivFactors(psi->noiseDataDequant[ch][noiseFloor][psi->noiseFloorBand], &(psi->qp1Inv), &(psi->qqp1Inv));
		}
		if (m == sbrFreq->freqHigh[psi->highBand + 1] - sbrFreq->kStart)
			psi->highBand++;
		if (m == freqBandTab[psi->sBand + 1] - sbrFreq->kStart) {
			psi->sBand++;
			psi->sMapped = GetSMapped(sbrGrid, sbrFreq, sbrChan, env, psi->sBand, psi->la);
		}

		/* get sIndexMapped for this QMF subband */
		sIndexMapped = 0;
		r = ((sbrFreq->freqHigh[psi->highBand+1] + sbrFreq->freqHigh[psi->highBand]) >> 1);
		if (m + sbrFreq->kStart == r) {
			/* r = center frequency, deltaStep = (env >= la || sIndexMapped'(r, numEnv'-1) == 1) */
			if (env >= psi->la || sbrChan->addHarmonic[0][r] == 1)
				sIndexMapped = sbrChan->addHarmonic[1][psi->highBand];
		}

		/* save sine flags from last envelope in this frame:
		 *   addHarmonic[0][0...63] = saved sine present flag from previous frame, for each QMF subband
		 *   addHarmonic[1][0...nHigh-1] = addHarmonic bit from current frame, for each high-res frequency band
		 * from MPEG reference code - slightly different from spec
		 *   (sIndexMapped'(m,LE'-1) can still be 0 when numEnv == psi->la)
		 */
		if (env == sbrGrid->numEnv - 1) {
			if (m + sbrFreq->kStart == r)
				sbrChan->addHarmonic[0][m + sbrFreq->kStart] = sbrChan->addHarmonic[1][psi->highBand];
			else
				sbrChan->addHarmonic[0][m + sbrFreq->kStart] = 0;
		}

		gain = psi->envDataDequant[ch][env][psi->sBand];
		qm = MULSHIFT32(gain, psi->qqp1Inv) << 1;
		sm = (sIndexMapped ? MULSHIFT32(gain, psi->qp1Inv) << 1 : 0);

		/* three cases: (sMapped == 0 && delta == 1), (sMapped == 0 && delta == 0), (sMapped == 1) */
		if (d == 1 && psi->sMapped == 0)
			gain = MULSHIFT32(psi->qp1Inv, gain) << 1;
		else if (psi->sMapped != 0)
			gain = MULSHIFT32(psi->qqp1Inv, gain) << 1;

		/* gain, qm, sm = Q(fbitsDQ), gainMax = Q(fbitsGainMax) */
		eCurr = psi->eCurr[m];
		if (eCurr) {
			z = CLZ(eCurr) - 1;
			r = InvRNormalized(eCurr << z);		/* in = Q(z - eCurrExp), out = Q(29 + 31 - z + eCurrExp) */
			gainScale = MULSHIFT32(gain, r);	/* out = Q(29 + 31 - z + eCurrExp + fbitsDQ - 32) */
			fbitsGain = 29 + 31 - z + psi->eCurrExp[m] + fbitsDQ - 32;
		} else {
			/* if eCurr == 0, then gain is unchanged (divide by EPS = 1) */
			gainScale = gain;
			fbitsGain = fbitsDQ;
		}

		/* see if gain for this band exceeds max gain */
		maxFlag = 0;
		if (gainMax != (int)0x80000000) {
			if (fbitsGain >= gainMaxFBits) {
				shift = MIN(fbitsGain - gainMaxFBits, 31);
				maxFlag = ((gainScale >> shift) > gainMax ? 1 : 0);
			} else {
				shift = MIN(gainMaxFBits - fbitsGain, 31);
				maxFlag = (gainScale > (gainMax >> shift) ? 1 : 0);
			}
		}

		if (maxFlag) {
			/* gainScale > gainMax, calculate ratio with 32/16 division */
			q = 0;
			r = gainScale;	/* guaranteed > 0, else maxFlag could not have been set */
			z = CLZ(r);
			if (z < 16) {
				q = 16 - z;
				r >>= q;	/* out = Q(fbitsGain - q) */
			}

			z = CLZ(gainMax) - 1;
			r = (gainMax << z) / r;		/* out = Q((fbitsGainMax + z) - (fbitsGain - q)) */
			q = (gainMaxFBits + z) - (fbitsGain - q);	/* r = Q(q) */
			if (q > 30) {
				r >>= MIN(q - 30, 31);
			} else {
				z = MIN(30 - q, 30);
				CLIP_2N_SHIFT30(r, z);	/* let r = Q30 since range = [0.0, 1.0) (clip to 0x3fffffff = 0.99999) */
			}

			qm = MULSHIFT32(qm, r) << 2;
			gain = MULSHIFT32(gain, r) << 2;
			psi->gLimBuf[m] = gainMax;
			psi->gLimFbits[m] = gainMaxFBits;
		} else {
			psi->gLimBuf[m] = gainScale;
			psi->gLimFbits[m] = fbitsGain;
		}

		/* sumSM, sumQM, sumECurrGLim = Q(fbitsDQ - ACC_SCALE) */
		psi->smBuf[m] = sm;
		psi->sumSM += (sm >> ACC_SCALE);

		psi->qmLimBuf[m] = qm;
		if (env != psi->la && env != sbrChan->laPrev && sm == 0)
			psi->sumQM += (qm >> ACC_SCALE);

		/* eCurr * gain^2 same as gain^2, before division by eCurr 
		 * (but note that gain != 0 even if eCurr == 0, since it's divided by eps)
		 */
		if (eCurr)
			psi->sumECurrGLim += (gain >> ACC_SCALE);
	}
}

/**************************************************************************************
 * Function:    ApplyBoost
 *
 * Description: calculate and apply boost factor for envelope, sinusoids, and noise 
 *                in this limiter band (4.6.18.7.5)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRFreq struct for this SCE/CPE block
 *              index of current limiter band
 *              number of fraction bits in dequantized envelope
 *
 * Outputs:     envelope gain, sinusoids and noise after scaling by gBoost
 *              format = Q(FBITS_GLIM_BOOST) for envelope gain,
 *                     = Q(FBITS_QLIM_BOOST) for noise
 *                     = Q(FBITS_OUT_QMFA) for sinusoids
 *
 * Return:      none
 *
 * Notes:       after scaling, each component has at least 1 GB
 **************************************************************************************/
static void ApplyBoost(PSInfoSBR *psi, SBRFreq *sbrFreq, int lim, int fbitsDQ)
{
	int m, mStart, mEnd, q, z, r;
	int sumEOrigMapped, gBoost;

	mStart = sbrFreq->freqLimiter[lim];   /* these are offsets from kStart */
	mEnd =   sbrFreq->freqLimiter[lim + 1];

	sumEOrigMapped = psi->sumEOrigMapped >> 1;
	r = (psi->sumECurrGLim >> 1) + (psi->sumSM >> 1) + (psi->sumQM >> 1);	/* 1 GB fine (sm and qm are mutually exclusive in acc) */
	if (r < (1 << (31-28))) {
		/* any non-zero numerator * 1/EPS_0 is > GBOOST_MAX 
		 * round very small r to zero to avoid scaling problems
		 */
		gBoost = (sumEOrigMapped == 0 ? (1 << 28) : GBOOST_MAX);
		z = 0;
	} else if (sumEOrigMapped == 0) {
		/* 1/(any non-zero denominator) * EPS_0 is appx. 0 */
		gBoost = 0;
		z = 0;
	} else {
		/* numerator (sumEOrigMapped) and denominator (r) have same Q format (before << z) */
		z = CLZ(r) - 1;	/* z = [0, 27] */
		r = InvRNormalized(r << z);
		gBoost = MULSHIFT32(sumEOrigMapped, r);
	}

	/* gBoost = Q(28 - z) */
	if (gBoost > (GBOOST_MAX >> z)) {
		gBoost = GBOOST_MAX;
		z = 0;
	}
	gBoost <<= z;	/* gBoost = Q28, minimum 1 GB */

	/* convert gain, noise, sinusoids to fixed Q format, clipping if necessary
	 *   (rare, usually only happens at very low bitrates, introduces slight
	 *    distortion into final HF mapping, but should be inaudible)
	 */
	for (m = mStart; m < mEnd; m++) {
		/* let gLimBoost = Q24, since in practice the max values are usually 16 to 20
		 *   unless limiterGains == 3 (limiter off) and eCurr ~= 0 (i.e. huge gain, but only
		 *   because the envelope has 0 power anyway)
		 */
		q = MULSHIFT32(psi->gLimBuf[m], gBoost) << 2;	/* Q(gLimFbits) * Q(28) --> Q(gLimFbits[m]-2) */
		r = SqrtFix(q, psi->gLimFbits[m] - 2, &z);
		z -= FBITS_GLIM_BOOST;
		if (z >= 0) {
			psi->gLimBoost[m] = r >> MIN(z, 31);
		} else {
			z = MIN(30, -z);
			CLIP_2N_SHIFT30(r, z);
			psi->gLimBoost[m] = r;
		}

		q = MULSHIFT32(psi->qmLimBuf[m], gBoost) << 2;	/* Q(fbitsDQ) * Q(28) --> Q(fbitsDQ-2) */
		r = SqrtFix(q, fbitsDQ - 2, &z);
		z -= FBITS_QLIM_BOOST;		/* << by 14, since integer sqrt of x < 2^16, and we want to leave 1 GB */
		if (z >= 0) {
			psi->qmLimBoost[m] = r >> MIN(31, z);
		} else {
			z = MIN(30, -z);
			CLIP_2N_SHIFT30(r, z);
			psi->qmLimBoost[m] = r;
		}

		q = MULSHIFT32(psi->smBuf[m], gBoost) << 2;		/* Q(fbitsDQ) * Q(28) --> Q(fbitsDQ-2) */
		r = SqrtFix(q, fbitsDQ - 2, &z);
		z -= FBITS_OUT_QMFA;		/* justify for adding to signal (xBuf) later */
		if (z >= 0) {
			psi->smBoost[m] = r >> MIN(31, z);
		} else {
			z = MIN(30, -z);
			CLIP_2N_SHIFT30(r, z);
			psi->smBoost[m] = r;
		}
	}
}

/**************************************************************************************
 * Function:    CalcGain
 *
 * Description: calculate and apply proper gain to HF components in one envelope 
 *                (4.6.18.7.5)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRHeader struct for this SCE/CPE block
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current channel (0 for SCE, 0 or 1 for CPE)
 *              index of current envelope
 *
 * Outputs:     envelope gain, sinusoids and noise after scaling
 *
 * Return:      none
 **************************************************************************************/
static void CalcGain(PSInfoSBR *psi, SBRHeader *sbrHdr, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch, int env)
{
	int lim, fbitsDQ;

	/* initialize to -1 so that mapping limiter bands to env/noise bands works right on first pass */
	psi->envBand        = -1;
	psi->noiseFloorBand = -1;
	psi->sBand          = -1;
	psi->highBand       = -1;

	fbitsDQ = (FBITS_OUT_DQ_ENV - psi->envDataDequantScale[ch][env]);	/* Q(29 - optional scalefactor) */
	for (lim = 0; lim < sbrFreq->nLimiter; lim++) {
		/* the QMF bands are divided into lim regions (consecutive, non-overlapping) */
		CalcMaxGain(psi, sbrHdr, sbrGrid, sbrFreq, ch, env, lim, fbitsDQ);
		CalcComponentGains(psi, sbrGrid, sbrFreq, sbrChan, ch, env, lim, fbitsDQ);
		ApplyBoost(psi, sbrFreq, lim, fbitsDQ);
	}
}

/* hSmooth table from 4.7.18.7.6, format = Q31 */
static const int hSmoothCoef[MAX_NUM_SMOOTH_COEFS] = {
	0x2aaaaaab, 0x2697a512, 0x1becfa68, 0x0ebdb043, 0x04130598, 
};

/**************************************************************************************
 * Function:    MapHF
 *
 * Description: map HF components to proper QMF bands, with optional gain smoothing
 *                filter (4.6.18.7.6)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRHeader struct for this SCE/CPE block
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current envelope
 *              reset flag (can be non-zero for first envelope only)
 *
 * Outputs:     complete reconstructed subband QMF samples for this envelope
 *
 * Return:      none
 * 
 * Notes:       ensures that output has >= MIN_GBITS_IN_QMFS guard bits,
 *                so it's not necessary to check anything in the synth QMF
 **************************************************************************************/
static void MapHF(PSInfoSBR *psi, SBRHeader *sbrHdr, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int env, int hfReset)
{
	int noiseTabIndex, sinIndex, gainNoiseIndex, hSL;
	int i, iStart, iEnd, m, idx, j, s, n, smre, smim;
	int gFilt, qFilt, xre, xim, gbMask, gbIdx;
	int *XBuf;

	noiseTabIndex =   sbrChan->noiseTabIndex;
	sinIndex =        sbrChan->sinIndex;
	gainNoiseIndex =  sbrChan->gainNoiseIndex;	/* oldest entries in filter delay buffer */

	if (hfReset)
		noiseTabIndex = 2;	/* starts at 1, double since complex */
	hSL = (sbrHdr->smoothMode ? 0 : 4); 

	if (hfReset) {
		for (i = 0; i < hSL; i++) {
			for (m = 0; m < sbrFreq->numQMFBands; m++) {
				sbrChan->gTemp[gainNoiseIndex][m] = psi->gLimBoost[m];
				sbrChan->qTemp[gainNoiseIndex][m] = psi->qmLimBoost[m];
			}
			gainNoiseIndex++;
			if (gainNoiseIndex == MAX_NUM_SMOOTH_COEFS)
				gainNoiseIndex = 0;
		}
		ASSERT(env == 0);	/* should only be reset when env == 0 */
	}

	iStart = sbrGrid->envTimeBorder[env];
	iEnd =   sbrGrid->envTimeBorder[env+1];
	for (i = iStart; i < iEnd; i++) {
		/* save new values in temp buffers (delay)
		 * we only store MAX_NUM_SMOOTH_COEFS most recent values, 
		 *   so don't keep storing the same value over and over
		 */
		if (i - iStart < MAX_NUM_SMOOTH_COEFS) {
			for (m = 0; m < sbrFreq->numQMFBands; m++) {
				sbrChan->gTemp[gainNoiseIndex][m] = psi->gLimBoost[m];
				sbrChan->qTemp[gainNoiseIndex][m] = psi->qmLimBoost[m];
			}
		}

		/* see 4.6.18.7.6 */
		XBuf = psi->XBuf[i + HF_ADJ][sbrFreq->kStart];
		gbMask = 0;
		for (m = 0; m < sbrFreq->numQMFBands; m++) {
			if (env == psi->la || env == sbrChan->laPrev) {
				/* no smoothing filter for gain, and qFilt = 0 (only need to do once) */
				if (i == iStart) {
					psi->gFiltLast[m] = sbrChan->gTemp[gainNoiseIndex][m];
					psi->qFiltLast[m] = 0;
				}
			} else if (hSL == 0) {
				/* no smoothing filter for gain, (only need to do once) */
				if (i == iStart) {
					psi->gFiltLast[m] = sbrChan->gTemp[gainNoiseIndex][m];
					psi->qFiltLast[m] = sbrChan->qTemp[gainNoiseIndex][m];
				}
			} else {
				/* apply smoothing filter to gain and noise (after MAX_NUM_SMOOTH_COEFS, it's always the same) */
				if (i - iStart < MAX_NUM_SMOOTH_COEFS) {
					gFilt = 0;
					qFilt = 0;
					idx = gainNoiseIndex;
					for (j = 0; j < MAX_NUM_SMOOTH_COEFS; j++) {
						/* sum(abs(hSmoothCoef[j])) for all j < 1.0 */
						gFilt += MULSHIFT32(sbrChan->gTemp[idx][m], hSmoothCoef[j]);
						qFilt += MULSHIFT32(sbrChan->qTemp[idx][m], hSmoothCoef[j]);
						idx--;
						if (idx < 0)
							idx += MAX_NUM_SMOOTH_COEFS;
					}
					psi->gFiltLast[m] = gFilt << 1;	/* restore to Q(FBITS_GLIM_BOOST) (gain of filter < 1.0, so no overflow) */
					psi->qFiltLast[m] = qFilt << 1;	/* restore to Q(FBITS_QLIM_BOOST) */
				}
			}

			if (psi->smBoost[m] != 0) {
				/* add scaled signal and sinusoid, don't add noise (qFilt = 0) */
				smre = psi->smBoost[m];
				smim = smre;

				/* sinIndex:  [0] xre += sm   [1] xim += sm*s   [2] xre -= sm   [3] xim -= sm*s  */
				s = (sinIndex >> 1);	/* if 2 or 3, flip sign to subtract sm */
				s <<= 31;
				smre ^= (s >> 31);
				smre -= (s >> 31);
				s ^= ((m + sbrFreq->kStart) << 31);
				smim ^= (s >> 31);
				smim -= (s >> 31);

				/* if sinIndex == 0 or 2, smim = 0; if sinIndex == 1 or 3, smre = 0 */
				s = sinIndex << 31;
				smim &= (s >> 31);
				s ^= 0x80000000;
				smre &= (s >> 31);

				noiseTabIndex += 2;		/* noise filtered by 0, but still need to bump index */
			} else {
				/* add scaled signal and scaled noise */
				qFilt = psi->qFiltLast[m];	
				n = noiseTab[noiseTabIndex++];
				smre = MULSHIFT32(n, qFilt) >> (FBITS_QLIM_BOOST - 1 - FBITS_OUT_QMFA);

				n = noiseTab[noiseTabIndex++];
				smim = MULSHIFT32(n, qFilt) >> (FBITS_QLIM_BOOST - 1 - FBITS_OUT_QMFA);
			}
			noiseTabIndex &= 1023;	/* 512 complex numbers */

			gFilt = psi->gFiltLast[m];
			xre = MULSHIFT32(gFilt, XBuf[0]);
			xim = MULSHIFT32(gFilt, XBuf[1]);
			CLIP_2N_SHIFT30(xre, 32 - FBITS_GLIM_BOOST);
			CLIP_2N_SHIFT30(xim, 32 - FBITS_GLIM_BOOST);

			xre += smre;	*XBuf++ = xre;
			xim += smim;	*XBuf++ = xim;

			gbMask |= FASTABS(xre);
			gbMask |= FASTABS(xim);
		}
		/* update circular buffer index */
		gainNoiseIndex++;
		if (gainNoiseIndex == MAX_NUM_SMOOTH_COEFS)
			gainNoiseIndex = 0;

		sinIndex++;
		sinIndex &= 3;

		/* ensure MIN_GBITS_IN_QMFS guard bits in output
		 * almost never occurs in practice, but checking here makes synth QMF logic very simple
		 */
		if (gbMask >> (31 - MIN_GBITS_IN_QMFS)) {
			XBuf = psi->XBuf[i + HF_ADJ][sbrFreq->kStart];
			for (m = 0; m < sbrFreq->numQMFBands; m++) {
				xre = XBuf[0];	xim = XBuf[1];	
				CLIP_2N(xre, (31 - MIN_GBITS_IN_QMFS));	
				CLIP_2N(xim, (31 - MIN_GBITS_IN_QMFS));	
				*XBuf++ = xre;	*XBuf++ = xim;
			}	
			CLIP_2N(gbMask, (31 - MIN_GBITS_IN_QMFS));	
		}
		gbIdx = ((i + HF_ADJ) >> 5) & 0x01;
		sbrChan->gbMask[gbIdx] |= gbMask;
	}
	sbrChan->noiseTabIndex =  noiseTabIndex;
	sbrChan->sinIndex =       sinIndex;
	sbrChan->gainNoiseIndex = gainNoiseIndex;
}

/**************************************************************************************
 * Function:    AdjustHighFreq
 *
 * Description: adjust high frequencies and add noise and sinusoids (4.6.18.7)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRHeader struct for this SCE/CPE block
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current channel (0 for SCE, 0 or 1 for CPE)
 *
 * Outputs:     complete reconstructed subband QMF samples for this channel
 *
 * Return:      none
 **************************************************************************************/
void AdjustHighFreq(PSInfoSBR *psi, SBRHeader *sbrHdr, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
{
	int i, env, hfReset;
	unsigned char frameClass, pointer;

	frameClass = sbrGrid->frameClass;
	pointer  = sbrGrid->pointer;

	/* derive la from table 4.159 */
	if ((frameClass == SBR_GRID_FIXVAR || frameClass == SBR_GRID_VARVAR) && pointer > 0)
		psi->la = sbrGrid->numEnv + 1 - pointer;
	else if (frameClass == SBR_GRID_VARFIX && pointer > 1)
		psi->la = pointer - 1;
	else
		psi->la = -1;

	/* for each envelope, estimate gain and adjust SBR QMF bands */
	hfReset = sbrChan->reset;
	for (env = 0; env < sbrGrid->numEnv; env++) {
		EstimateEnvelope(psi, sbrHdr, sbrGrid, sbrFreq, env);
		CalcGain(psi, sbrHdr, sbrGrid, sbrFreq, sbrChan, ch, env);
		MapHF(psi, sbrHdr, sbrGrid, sbrFreq, sbrChan, env, hfReset);
		hfReset = 0;	/* only set for first envelope after header reset */
	}

	/* set saved sine flags to 0 for QMF bands outside of current frequency range */
	for (i = 0; i < sbrFreq->freqLimiter[0] + sbrFreq->kStart; i++)
		sbrChan->addHarmonic[0][i] = 0;
	for (i = sbrFreq->freqLimiter[sbrFreq->nLimiter] + sbrFreq->kStart; i < 64; i++)
		sbrChan->addHarmonic[0][i] = 0;
	sbrChan->addHarmonicFlag[0] = sbrChan->addHarmonicFlag[1];

	/* save la for next frame */
	if (psi->la == sbrGrid->numEnv)
		sbrChan->laPrev = 0;
	else
		sbrChan->laPrev = -1;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrhfgen.c - high frequency generation for SBR
 **************************************************************************************/

//#include "sbr.h"
//#include "assembly.h"

#define FBITS_LPCOEFS	29	/* Q29 for range of (-4, 4) */
#define MAG_16			(16 * (1 << (32 - (2*(32-FBITS_LPCOEFS)))))		/* i.e. 16 in Q26 format */
#define RELAX_COEF		0x7ffff79c	/* 1.0 / (1.0 + 1e-6), Q31 */

/* newBWTab[prev invfMode][curr invfMode], format = Q31 (table 4.158) 
 * sample file which uses all of these: al_sbr_sr_64_2_fsaac32.aac 
 */
static const int newBWTab[4][4] = {
	{0x00000000, 0x4ccccccd, 0x73333333, 0x7d70a3d7},
	{0x4ccccccd, 0x60000000, 0x73333333, 0x7d70a3d7},
	{0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7},
	{0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7},
};

/**************************************************************************************
 * Function:    CVKernel1
 *
 * Description: kernel of covariance matrix calculation for p01, p11, p12, p22
 *
 * Inputs:      buffer of low-freq samples, starting at time index = 0, 
 *                freq index = patch subband
 *
 * Outputs:     64-bit accumulators for p01re, p01im, p12re, p12im, p11re, p22re
 *                stored in accBuf
 *
 * Return:      none
 *
 * Notes:       this is carefully written to be efficient on ARM
 *              use the assembly code version in sbrcov.s when building for ARM!
 **************************************************************************************/
#if (defined (__arm) && defined (__ARMCC_VERSION)) || (defined (_WIN32) && defined (_WIN32_WCE) && defined (ARM)) || (defined(__GNUC__) && defined(__arm__))
#ifdef __cplusplus
extern "C"
#endif
void CVKernel1(int *XBuf, int *accBuf);
#else
void CVKernel1(int *XBuf, int *accBuf)
{
	U64 p01re, p01im, p12re, p12im, p11re, p22re;
	int n, x0re, x0im, x1re, x1im;

	x0re = XBuf[0];
	x0im = XBuf[1];
	XBuf += (2*64);
	x1re = XBuf[0];
	x1im = XBuf[1];
	XBuf += (2*64);

	p01re.w64 = p01im.w64 = 0;
	p12re.w64 = p12im.w64 = 0;
	p11re.w64 = 0;
	p22re.w64 = 0;

	p12re.w64 = MADD64(p12re.w64,  x1re, x0re);
	p12re.w64 = MADD64(p12re.w64,  x1im, x0im);
	p12im.w64 = MADD64(p12im.w64,  x0re, x1im);
	p12im.w64 = MADD64(p12im.w64, -x0im, x1re);
	p22re.w64 = MADD64(p22re.w64,  x0re, x0re);
	p22re.w64 = MADD64(p22re.w64,  x0im, x0im);
	for (n = (NUM_TIME_SLOTS*SAMPLES_PER_SLOT + 6); n != 0; n--) {
		/* 4 input, 3*2 acc, 1 ptr, 1 loop counter = 12 registers (use same for x0im, -x0im) */
		x0re = x1re;
		x0im = x1im;
		x1re = XBuf[0];
		x1im = XBuf[1];

		p01re.w64 = MADD64(p01re.w64,  x1re, x0re);
		p01re.w64 = MADD64(p01re.w64,  x1im, x0im);
		p01im.w64 = MADD64(p01im.w64,  x0re, x1im);
		p01im.w64 = MADD64(p01im.w64, -x0im, x1re);
		p11re.w64 = MADD64(p11re.w64,  x0re, x0re);
		p11re.w64 = MADD64(p11re.w64,  x0im, x0im);

		XBuf += (2*64);
	}
	/* these can be derived by slight changes to account for boundary conditions */
	p12re.w64 += p01re.w64;
	p12re.w64 = MADD64(p12re.w64, x1re, -x0re);
	p12re.w64 = MADD64(p12re.w64, x1im, -x0im);
	p12im.w64 += p01im.w64;
	p12im.w64 = MADD64(p12im.w64, x0re, -x1im);
	p12im.w64 = MADD64(p12im.w64, x0im,  x1re);
	p22re.w64 += p11re.w64;
	p22re.w64 = MADD64(p22re.w64, x0re, -x0re);
	p22re.w64 = MADD64(p22re.w64, x0im, -x0im);

	accBuf[0]  = p01re.r.lo32;	accBuf[1]  = p01re.r.hi32;
	accBuf[2]  = p01im.r.lo32;	accBuf[3]  = p01im.r.hi32;
	accBuf[4]  = p11re.r.lo32;	accBuf[5]  = p11re.r.hi32;
	accBuf[6]  = p12re.r.lo32;	accBuf[7]  = p12re.r.hi32;
	accBuf[8]  = p12im.r.lo32;	accBuf[9]  = p12im.r.hi32;
	accBuf[10] = p22re.r.lo32;	accBuf[11] = p22re.r.hi32;
}
#endif

/**************************************************************************************
 * Function:    CalcCovariance1
 *
 * Description: calculate covariance matrix for p01, p12, p11, p22 (4.6.18.6.2)
 *
 * Inputs:      buffer of low-freq samples, starting at time index 0, 
 *                freq index = patch subband
 *
 * Outputs:     complex covariance elements p01re, p01im, p12re, p12im, p11re, p22re
 *                (p11im = p22im = 0)
 *              format = integer (Q0) * 2^N, with scalefactor N >= 0
 *
 * Return:      scalefactor N
 *
 * Notes:       outputs are normalized to have 1 GB (sign in at least top 2 bits)
 **************************************************************************************/
static int CalcCovariance1(int *XBuf, int *p01reN, int *p01imN, int *p12reN, int *p12imN, int *p11reN, int *p22reN)
{
	int accBuf[2*6];
	int n, z, s, loShift, hiShift, gbMask;
	U64 p01re, p01im, p12re, p12im, p11re, p22re;

	CVKernel1(XBuf, accBuf);
	p01re.r.lo32 = accBuf[0];	p01re.r.hi32 = accBuf[1];
	p01im.r.lo32 = accBuf[2];	p01im.r.hi32 = accBuf[3];
	p11re.r.lo32 = accBuf[4];	p11re.r.hi32 = accBuf[5];
	p12re.r.lo32 = accBuf[6];	p12re.r.hi32 = accBuf[7];
	p12im.r.lo32 = accBuf[8];	p12im.r.hi32 = accBuf[9];
	p22re.r.lo32 = accBuf[10];	p22re.r.hi32 = accBuf[11];

	/* 64-bit accumulators now have 2*FBITS_OUT_QMFA fraction bits
	 * want to scale them down to integers (32-bit signed, Q0)
	 *   with scale factor of 2^n, n >= 0
	 * leave 2 GB's for calculating determinant, so take top 30 non-zero bits
	 */
	gbMask  = ((p01re.r.hi32) ^ (p01re.r.hi32 >> 31)) | ((p01im.r.hi32) ^ (p01im.r.hi32 >> 31));
	gbMask |= ((p12re.r.hi32) ^ (p12re.r.hi32 >> 31)) | ((p12im.r.hi32) ^ (p12im.r.hi32 >> 31));
	gbMask |= ((p11re.r.hi32) ^ (p11re.r.hi32 >> 31)) | ((p22re.r.hi32) ^ (p22re.r.hi32 >> 31));
	if (gbMask == 0) {
		s = p01re.r.hi32 >> 31; gbMask  = (p01re.r.lo32 ^ s) - s;
		s = p01im.r.hi32 >> 31; gbMask |= (p01im.r.lo32 ^ s) - s;
		s = p12re.r.hi32 >> 31; gbMask |= (p12re.r.lo32 ^ s) - s;
		s = p12im.r.hi32 >> 31; gbMask |= (p12im.r.lo32 ^ s) - s;
		s = p11re.r.hi32 >> 31; gbMask |= (p11re.r.lo32 ^ s) - s;
		s = p22re.r.hi32 >> 31; gbMask |= (p22re.r.lo32 ^ s) - s;
		z = 32 + CLZ(gbMask);
	} else {
		gbMask  = FASTABS(p01re.r.hi32) | FASTABS(p01im.r.hi32);
		gbMask |= FASTABS(p12re.r.hi32) | FASTABS(p12im.r.hi32);
		gbMask |= FASTABS(p11re.r.hi32) | FASTABS(p22re.r.hi32);
		z = CLZ(gbMask);
	}

	n = 64 - z;	/* number of non-zero bits in bottom of 64-bit word */
	if (n <= 30) {
		loShift = (30 - n);
		*p01reN = p01re.r.lo32 << loShift;	*p01imN = p01im.r.lo32 << loShift;
		*p12reN = p12re.r.lo32 << loShift;	*p12imN = p12im.r.lo32 << loShift;
		*p11reN = p11re.r.lo32 << loShift;	*p22reN = p22re.r.lo32 << loShift;
		return -(loShift + 2*FBITS_OUT_QMFA);
	} else if (n < 32 + 30) {
		loShift = (n - 30);
		hiShift = 32 - loShift;
		*p01reN = (p01re.r.hi32 << hiShift) | (p01re.r.lo32 >> loShift);
		*p01imN = (p01im.r.hi32 << hiShift) | (p01im.r.lo32 >> loShift);
		*p12reN = (p12re.r.hi32 << hiShift) | (p12re.r.lo32 >> loShift);
		*p12imN = (p12im.r.hi32 << hiShift) | (p12im.r.lo32 >> loShift);
		*p11reN = (p11re.r.hi32 << hiShift) | (p11re.r.lo32 >> loShift);
		*p22reN = (p22re.r.hi32 << hiShift) | (p22re.r.lo32 >> loShift);
		return (loShift - 2*FBITS_OUT_QMFA);
	} else {
		hiShift = n - (32 + 30);
		*p01reN = p01re.r.hi32 >> hiShift;	*p01imN = p01im.r.hi32 >> hiShift;
		*p12reN = p12re.r.hi32 >> hiShift;	*p12imN = p12im.r.hi32 >> hiShift;
		*p11reN = p11re.r.hi32 >> hiShift;	*p22reN = p22re.r.hi32 >> hiShift;
		return (32 - 2*FBITS_OUT_QMFA - hiShift);
	}

	return 0;
}

/**************************************************************************************
 * Function:    CVKernel2
 *
 * Description: kernel of covariance matrix calculation for p02
 *
 * Inputs:      buffer of low-freq samples, starting at time index = 0, 
 *                freq index = patch subband
 *
 * Outputs:     64-bit accumulators for p02re, p02im stored in accBuf
 *
 * Return:      none
 *
 * Notes:       this is carefully written to be efficient on ARM
 *              use the assembly code version in sbrcov.s when building for ARM!
 **************************************************************************************/
#if (defined (__arm) && defined (__ARMCC_VERSION)) || (defined (_WIN32) && defined (_WIN32_WCE) && defined (ARM)) || (defined(__GNUC__) && defined(__arm__))
#ifdef __cplusplus
extern "C"
#endif
void CVKernel2(int *XBuf, int *accBuf);
#else
void CVKernel2(int *XBuf, int *accBuf)
{
	U64 p02re, p02im;
	int n, x0re, x0im, x1re, x1im, x2re, x2im;

	p02re.w64 = p02im.w64 = 0;

	x0re = XBuf[0];
	x0im = XBuf[1];
	XBuf += (2*64);
	x1re = XBuf[0];
	x1im = XBuf[1];
	XBuf += (2*64);

	for (n = (NUM_TIME_SLOTS*SAMPLES_PER_SLOT + 6); n != 0; n--) {
		/* 6 input, 2*2 acc, 1 ptr, 1 loop counter = 12 registers (use same for x0im, -x0im) */
		x2re = XBuf[0];
		x2im = XBuf[1];

		p02re.w64 = MADD64(p02re.w64,  x2re, x0re);
		p02re.w64 = MADD64(p02re.w64,  x2im, x0im);
		p02im.w64 = MADD64(p02im.w64,  x0re, x2im);
		p02im.w64 = MADD64(p02im.w64, -x0im, x2re);

		x0re = x1re;
		x0im = x1im;
		x1re = x2re;
		x1im = x2im;
		XBuf += (2*64);
	}

	accBuf[0] = p02re.r.lo32;
	accBuf[1] = p02re.r.hi32;
	accBuf[2] = p02im.r.lo32;
	accBuf[3] = p02im.r.hi32;
}
#endif

/**************************************************************************************
 * Function:    CalcCovariance2
 *
 * Description: calculate covariance matrix for p02 (4.6.18.6.2)
 *
 * Inputs:      buffer of low-freq samples, starting at time index = 0, 
 *                freq index = patch subband
 *
 * Outputs:     complex covariance element p02re, p02im
 *              format = integer (Q0) * 2^N, with scalefactor N >= 0
 *
 * Return:      scalefactor N
 *
 * Notes:       outputs are normalized to have 1 GB (sign in at least top 2 bits)
 **************************************************************************************/
static int CalcCovariance2(int *XBuf, int *p02reN, int *p02imN)
{
	U64 p02re, p02im;
	int n, z, s, loShift, hiShift, gbMask;
	int accBuf[2*2];

	CVKernel2(XBuf, accBuf);
	p02re.r.lo32 = accBuf[0];
	p02re.r.hi32 = accBuf[1];
	p02im.r.lo32 = accBuf[2];
	p02im.r.hi32 = accBuf[3];

	/* 64-bit accumulators now have 2*FBITS_OUT_QMFA fraction bits
	 * want to scale them down to integers (32-bit signed, Q0)
	 *   with scale factor of 2^n, n >= 0
	 * leave 1 GB for calculating determinant, so take top 30 non-zero bits
	 */
	gbMask  = ((p02re.r.hi32) ^ (p02re.r.hi32 >> 31)) | ((p02im.r.hi32) ^ (p02im.r.hi32 >> 31));
	if (gbMask == 0) {
		s = p02re.r.hi32 >> 31; gbMask  = (p02re.r.lo32 ^ s) - s;
		s = p02im.r.hi32 >> 31; gbMask |= (p02im.r.lo32 ^ s) - s;
		z = 32 + CLZ(gbMask);
	} else {
		gbMask  = FASTABS(p02re.r.hi32) | FASTABS(p02im.r.hi32);
		z = CLZ(gbMask);
	}
	n = 64 - z;	/* number of non-zero bits in bottom of 64-bit word */

	if (n <= 30) {
		loShift = (30 - n);
		*p02reN = p02re.r.lo32 << loShift;	
		*p02imN = p02im.r.lo32 << loShift;
		return -(loShift + 2*FBITS_OUT_QMFA);
	} else if (n < 32 + 30) {
		loShift = (n - 30);
		hiShift = 32 - loShift;
		*p02reN = (p02re.r.hi32 << hiShift) | (p02re.r.lo32 >> loShift);
		*p02imN = (p02im.r.hi32 << hiShift) | (p02im.r.lo32 >> loShift);
		return (loShift - 2*FBITS_OUT_QMFA);
	} else {
		hiShift = n - (32 + 30);
		*p02reN = p02re.r.hi32 >> hiShift;	
		*p02imN = p02im.r.hi32 >> hiShift;
		return (32 - 2*FBITS_OUT_QMFA - hiShift);
	}

	return 0;
}

/**************************************************************************************
 * Function:    CalcLPCoefs
 *
 * Description: calculate linear prediction coefficients for one subband (4.6.18.6.2)
 *
 * Inputs:      buffer of low-freq samples, starting at time index = 0, 
 *                freq index = patch subband
 *              number of guard bits in input sample buffer
 *
 * Outputs:     complex LP coefficients a0re, a0im, a1re, a1im, format = Q29
 *
 * Return:      none
 *
 * Notes:       output coefficients (a0re, a0im, a1re, a1im) clipped to range (-4, 4)
 *              if the comples coefficients have magnitude >= 4.0, they are all
 *                set to 0 (see spec)
 **************************************************************************************/
static void CalcLPCoefs(int *XBuf, int *a0re, int *a0im, int *a1re, int *a1im, int gb)
{
	int zFlag, n1, n2, nd, d, dInv, tre, tim;
	int p01re, p01im, p02re, p02im, p12re, p12im, p11re, p22re;

	/* pre-scale to avoid overflow - probably never happens in practice (see QMFA)
	 *   max bit growth per accumulator = 38*2 = 76 mul-adds (X * X)
	 *   using 64-bit MADD, so if X has n guard bits, X*X has 2n+1 guard bits
	 *   gain 1 extra sign bit per multiply, so ensure ceil(log2(76/2) / 2) = 3 guard bits on inputs
	 */
	if (gb < 3) {
		nd = 3 - gb;
		for (n1 = (NUM_TIME_SLOTS*SAMPLES_PER_SLOT + 6 + 2); n1 != 0; n1--) {
			XBuf[0] >>= nd;	XBuf[1] >>= nd;
			XBuf += (2*64);
		}
		XBuf -= (2*64*(NUM_TIME_SLOTS*SAMPLES_PER_SLOT + 6 + 2));
	}
	
	/* calculate covariance elements */
	n1 = CalcCovariance1(XBuf, &p01re, &p01im, &p12re, &p12im, &p11re, &p22re);
	n2 = CalcCovariance2(XBuf, &p02re, &p02im);

	/* normalize everything to larger power of 2 scalefactor, call it n1 */
	if (n1 < n2) {
		nd = MIN(n2 - n1, 31);
		p01re >>= nd;	p01im >>= nd;
		p12re >>= nd;	p12im >>= nd;
		p11re >>= nd;	p22re >>= nd;
		n1 = n2;
	} else if (n1 > n2) {
		nd = MIN(n1 - n2, 31);
		p02re >>= nd;	p02im >>= nd;
	}

	/* calculate determinant of covariance matrix (at least 1 GB in pXX) */
	d = MULSHIFT32(p12re, p12re) + MULSHIFT32(p12im, p12im);
	d = MULSHIFT32(d, RELAX_COEF) << 1;
	d = MULSHIFT32(p11re, p22re) - d;
	ASSERT(d >= 0);	/* should never be < 0 */

	zFlag = 0;
	*a0re = *a0im = 0;
	*a1re = *a1im = 0;
	if (d > 0) {
		/* input =   Q31  d    = Q(-2*n1 - 32 + nd) = Q31 * 2^(31 + 2*n1 + 32 - nd)
		 * inverse = Q29  dInv = Q29 * 2^(-31 - 2*n1 - 32 + nd) = Q(29 + 31 + 2*n1 + 32 - nd)
		 *
		 * numerator has same Q format as d, since it's sum of normalized squares
		 * so num * inverse = Q(-2*n1 - 32) * Q(29 + 31 + 2*n1 + 32 - nd)
		 *                  = Q(29 + 31 - nd), drop low 32 in MULSHIFT32
		 *                  = Q(29 + 31 - 32 - nd) = Q(28 - nd)
		 */
		nd = CLZ(d) - 1;
		d <<= nd;
		dInv = InvRNormalized(d);

		/* 1 GB in pXX */
		tre = MULSHIFT32(p01re, p12re) - MULSHIFT32(p01im, p12im) - MULSHIFT32(p02re, p11re);
		tre = MULSHIFT32(tre, dInv);
		tim = MULSHIFT32(p01re, p12im) + MULSHIFT32(p01im, p12re) - MULSHIFT32(p02im, p11re);
		tim = MULSHIFT32(tim, dInv);

		/* if d is extremely small, just set coefs to 0 (would have poor precision anyway) */
		if (nd > 28 || (FASTABS(tre) >> (28 - nd)) >= 4 || (FASTABS(tim) >> (28 - nd)) >= 4) {
			zFlag = 1;
		} else {
			*a1re = tre << (FBITS_LPCOEFS - 28 + nd);	/* i.e. convert Q(28 - nd) to Q(29) */
			*a1im = tim << (FBITS_LPCOEFS - 28 + nd);
		}
	}

	if (p11re) {
		/* input =   Q31  p11re = Q(-n1 + nd) = Q31 * 2^(31 + n1 - nd)
		 * inverse = Q29  dInv  = Q29 * 2^(-31 - n1 + nd) = Q(29 + 31 + n1 - nd)
		 *
		 * numerator is Q(-n1 - 3)
		 * so num * inverse = Q(-n1 - 3) * Q(29 + 31 + n1 - nd)
		 *                  = Q(29 + 31 - 3 - nd), drop low 32 in MULSHIFT32
		 *                  = Q(29 + 31 - 3 - 32 - nd) = Q(25 - nd)
		 */
		nd = CLZ(p11re) - 1;	/* assume positive */
		p11re <<= nd;
		dInv = InvRNormalized(p11re);

		/* a1re, a1im = Q29, so scaled by (n1 + 3) */
		tre = (p01re >> 3) + MULSHIFT32(p12re, *a1re) + MULSHIFT32(p12im, *a1im);
		tre = -MULSHIFT32(tre, dInv);
		tim = (p01im >> 3) - MULSHIFT32(p12im, *a1re) + MULSHIFT32(p12re, *a1im);
		tim = -MULSHIFT32(tim, dInv);

		if (nd > 25 || (FASTABS(tre) >> (25 - nd)) >= 4 || (FASTABS(tim) >> (25 - nd)) >= 4) {
			zFlag = 1;
		} else {
			*a0re = tre << (FBITS_LPCOEFS - 25 + nd);	/* i.e. convert Q(25 - nd) to Q(29) */
			*a0im = tim << (FBITS_LPCOEFS - 25 + nd);
		}
	} 

	/* see 4.6.18.6.2 - if magnitude of a0 or a1 >= 4 then a0 = a1 = 0 
	 * i.e. a0re < 4, a0im < 4, a1re < 4, a1im < 4
	 * Q29*Q29 = Q26
	 */
	if (zFlag || MULSHIFT32(*a0re, *a0re) + MULSHIFT32(*a0im, *a0im) >= MAG_16 || MULSHIFT32(*a1re, *a1re) + MULSHIFT32(*a1im, *a1im) >= MAG_16) {
		*a0re = *a0im = 0;
		*a1re = *a1im = 0;
	}

	/* no need to clip - we never changed the XBuf data, just used it to calculate a0 and a1 */
	if (gb < 3) {
		nd = 3 - gb;
		for (n1 = (NUM_TIME_SLOTS*SAMPLES_PER_SLOT + 6 + 2); n1 != 0; n1--) {
			XBuf[0] <<= nd;	XBuf[1] <<= nd;
			XBuf += (2*64);
		}
	}
}

/**************************************************************************************
 * Function:    GenerateHighFreq
 *
 * Description: generate high frequencies with SBR (4.6.18.6)
 *
 * Inputs:      initialized PSInfoSBR struct
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current channel (0 for SCE, 0 or 1 for CPE)
 *
 * Outputs:     new high frequency samples starting at frequency kStart
 *
 * Return:      none
 **************************************************************************************/
void GenerateHighFreq(PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
{
	int band, newBW, c, t, gb, gbMask, gbIdx;
	int currPatch, p, x, k, g, i, iStart, iEnd, bw, bwsq;
	int a0re, a0im, a1re, a1im;
	int x1re, x1im, x2re, x2im;
	int ACCre, ACCim;
	int *XBufLo, *XBufHi;

	/* calculate array of chirp factors */
	for (band = 0; band < sbrFreq->numNoiseFloorBands; band++) {
		c = sbrChan->chirpFact[band];	/* previous (bwArray') */
		newBW = newBWTab[sbrChan->invfMode[0][band]][sbrChan->invfMode[1][band]];

		/* weighted average of new and old (can't overflow - total gain = 1.0) */
		if (newBW < c)
			t = MULSHIFT32(newBW, 0x60000000) + MULSHIFT32(0x20000000, c);	/* new is smaller: 0.75*new + 0.25*old */
		else
			t = MULSHIFT32(newBW, 0x74000000) + MULSHIFT32(0x0c000000, c);	/* new is larger: 0.90625*new + 0.09375*old */
		t <<= 1;

		if (t < 0x02000000)	/* below 0.015625, clip to 0 */
			t = 0;
		if (t > 0x7f800000)	/* clip to 0.99609375 */  
			t = 0x7f800000;

		/* save curr as prev for next time */
		sbrChan->chirpFact[band] = t;
		sbrChan->invfMode[0][band] = sbrChan->invfMode[1][band];
	}

	iStart = sbrGrid->envTimeBorder[0] + HF_ADJ;
	iEnd =   sbrGrid->envTimeBorder[sbrGrid->numEnv] + HF_ADJ;

	/* generate new high freqs from low freqs, patches, and chirp factors */
	k = sbrFreq->kStart;
	g = 0;
	bw = sbrChan->chirpFact[g];
	bwsq = MULSHIFT32(bw, bw) << 1;
	
	gbMask = (sbrChan->gbMask[0] | sbrChan->gbMask[1]);	/* older 32 | newer 8 */
	gb = CLZ(gbMask) - 1;

	for (currPatch = 0; currPatch < sbrFreq->numPatches; currPatch++) {
		for (x = 0; x < sbrFreq->patchNumSubbands[currPatch]; x++) {
			/* map k to corresponding noise floor band */
			if (k >= sbrFreq->freqNoise[g+1]) {
				g++;
				bw = sbrChan->chirpFact[g];		/* Q31 */
				bwsq = MULSHIFT32(bw, bw) << 1;	/* Q31 */
			}
		
			p = sbrFreq->patchStartSubband[currPatch] + x;	/* low QMF band */
			XBufHi = psi->XBuf[iStart][k];
			if (bw) {
				CalcLPCoefs(psi->XBuf[0][p], &a0re, &a0im, &a1re, &a1im, gb);

				a0re = MULSHIFT32(bw, a0re);	/* Q31 * Q29 = Q28 */
				a0im = MULSHIFT32(bw, a0im);
				a1re = MULSHIFT32(bwsq, a1re);
				a1im = MULSHIFT32(bwsq, a1im);

				XBufLo = psi->XBuf[iStart-2][p];

				x2re = XBufLo[0];	/* RE{XBuf[n-2]} */
				x2im = XBufLo[1];	/* IM{XBuf[n-2]} */
				XBufLo += (64*2);

				x1re = XBufLo[0];	/* RE{XBuf[n-1]} */
				x1im = XBufLo[1];	/* IM{XBuf[n-1]} */
				XBufLo += (64*2);

				for (i = iStart; i < iEnd; i++) {
					/* a0re/im, a1re/im are Q28 with at least 1 GB, 
					 *   so the summing for AACre/im is fine (1 GB in, plus 1 from MULSHIFT32) 
					 */
					ACCre = MULSHIFT32(x2re, a1re) - MULSHIFT32(x2im, a1im);
					ACCim = MULSHIFT32(x2re, a1im) + MULSHIFT32(x2im, a1re);
					x2re = x1re;
					x2im = x1im;
					
					ACCre += MULSHIFT32(x1re, a0re) - MULSHIFT32(x1im, a0im);
					ACCim += MULSHIFT32(x1re, a0im) + MULSHIFT32(x1im, a0re);
					x1re = XBufLo[0];	/* RE{XBuf[n]} */
					x1im = XBufLo[1];	/* IM{XBuf[n]} */
					XBufLo += (64*2);

					/* lost 4 fbits when scaling by a0re/im, a1re/im (Q28) */
					CLIP_2N_SHIFT30(ACCre, 4);
					ACCre += x1re;
					CLIP_2N_SHIFT30(ACCim, 4);
					ACCim += x1im;

					XBufHi[0] = ACCre;
					XBufHi[1] = ACCim;
					XBufHi += (64*2);

					/* update guard bit masks */
					gbMask  = FASTABS(ACCre);
					gbMask |= FASTABS(ACCim);
					gbIdx = (i >> 5) & 0x01;	/* 0 if i < 32, 1 if i >= 32 */
					sbrChan->gbMask[gbIdx] |= gbMask;
				}
			} else {
				XBufLo = (int *)psi->XBuf[iStart][p];
				for (i = iStart; i < iEnd; i++) {
					XBufHi[0] = XBufLo[0];
					XBufHi[1] = XBufLo[1];
					XBufLo += (64*2); 
					XBufHi += (64*2);
				}
			}
			k++;	/* high QMF band */
		}
	}
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrhuff.c - functions for unpacking Huffman-coded envelope and noise data
 **************************************************************************************/

//#include "sbr.h"
//#include "assembly.h"

/**************************************************************************************
 * Function:    DecodeHuffmanScalar
 *
 * Description: decode one Huffman symbol from bitstream
 *
 * Inputs:      pointers to Huffman table and info struct
 *              left-aligned bit buffer with >= huffTabInfo->maxBits bits
 *
 * Outputs:     decoded symbol in *val
 *
 * Return:      number of bits in symbol
 *
 * Notes:       assumes canonical Huffman codes:
 *                first CW always 0, we have "count" CW's of length "nBits" bits
 *                starting CW for codes of length nBits+1 = 
 *                  (startCW[nBits] + count[nBits]) << 1
 *                if there are no codes at nBits, then we just keep << 1 each time 
 *                  (since count[nBits] = 0)
 **************************************************************************************/
/*static int DecodeHuffmanScalar(const signed short *huffTab, const HuffInfo *huffTabInfo, unsigned int bitBuf, signed int *val)
{
    unsigned int count, start, shift, t;
	const unsigned char *countPtr;
	const signed short *map;

	map = huffTab + huffTabInfo->offset;
	countPtr = huffTabInfo->count;

	start = 0;
	count = 0;
	shift = 32;
	do {
		start += count;
		start <<= 1;
		map += count;
		count = *countPtr++;
		shift--;
		t = (bitBuf >> shift) - start;
	} while (t >= count);
	
	*val = (signed int)map[t];
	return (countPtr - huffTabInfo->count);
}*/

/**************************************************************************************
 * Function:    DecodeOneSymbol
 *
 * Description: dequantize one Huffman symbol from bitstream, 
 *                using table huffTabSBR[huffTabIndex]
 *
 * Inputs:      BitStreamInfo struct pointing to start of next Huffman codeword
 *              index of Huffman table
 *
 * Outputs:     bitstream advanced by number of bits in codeword
 *
 * Return:      one decoded symbol
 **************************************************************************************/
static int DecodeOneSymbol(BitStreamInfo *bsi, int huffTabIndex)
{
	int nBits, val;
	unsigned int bitBuf;
	const HuffInfo *hi;

	hi = &(huffTabSBRInfo[huffTabIndex]);

	bitBuf = GetBitsNoAdvance(bsi, hi->maxBits) << (32 - hi->maxBits);
	nBits = DecodeHuffmanScalar(huffTabSBR, hi, bitBuf, &val);
	AdvanceBitstream(bsi, nBits);
	
	return val;
}

/* [1.0, sqrt(2)], format = Q29 (one guard bit for decoupling) */
static const int envDQTab[2] = {0x20000000, 0x2d413ccc};

/**************************************************************************************
 * Function:    DequantizeEnvelope
 *
 * Description: dequantize envelope scalefactors
 *
 * Inputs:      number of scalefactors to process
 *              amplitude resolution flag for this frame (0 or 1)
 *              quantized envelope scalefactors
 * 
 * Outputs:     dequantized envelope scalefactors
 *
 * Return:      extra int bits in output (6 + expMax)
 *              in other words, output format = Q(FBITS_OUT_DQ_ENV - (6 + expMax))
 *
 * Notes:       dequantized scalefactors have at least 2 GB
 **************************************************************************************/
static int DequantizeEnvelope(int nBands, int ampRes, signed char *envQuant, int *envDequant)
{
	int exp, expMax, i, scalei;

	if (nBands <= 0)
		return 0;
	
	/* scan for largest dequant value (do separately from envelope decoding to keep code cleaner) */
	expMax = 0;
	for (i = 0; i < nBands; i++) {
		if (envQuant[i] > expMax)
			expMax = envQuant[i];
	}

	/* dequantized envelope gains
	 *   envDequant = 64*2^(envQuant / alpha) = 2^(6 + envQuant / alpha)
	 *     if ampRes == 0, alpha = 2 and range of envQuant = [0, 127]
	 *     if ampRes == 1, alpha = 1 and range of envQuant = [0, 63]
	 * also if coupling is on, envDequant is scaled by something in range [0, 2]
	 * so range of envDequant = [2^6, 2^69] (no coupling), [2^6, 2^70] (with coupling)
	 * 
	 * typical range (from observation) of envQuant/alpha = [0, 27] --> largest envQuant ~= 2^33
	 * output: Q(29 - (6 + expMax))
	 *
	 * reference: 14496-3:2001(E)/4.6.18.3.5 and 14496-4:200X/FPDAM8/5.6.5.1.2.1.5
	 */
	if (ampRes) {
		do {
			exp = *envQuant++;
			scalei = MIN(expMax - exp, 31);
			*envDequant++ = envDQTab[0] >> scalei;
		} while (--nBands);

		return (6 + expMax);
	} else {
		expMax >>= 1;
		do {
			exp = *envQuant++;
			scalei = MIN(expMax - (exp >> 1), 31);
			*envDequant++ = envDQTab[exp & 0x01] >> scalei;
		} while (--nBands);

		return (6 + expMax);
	}

}

/**************************************************************************************
 * Function:    DequantizeNoise
 *
 * Description: dequantize noise scalefactors
 *
 * Inputs:      number of scalefactors to process
 *              quantized noise scalefactors
 * 
 * Outputs:     dequantized noise scalefactors, format = Q(FBITS_OUT_DQ_NOISE)
 *
 * Return:      none
 *
 * Notes:       dequantized scalefactors have at least 2 GB
 **************************************************************************************/
static void DequantizeNoise(int nBands, signed char *noiseQuant, int *noiseDequant)
{
	int exp, scalei;
	
	if (nBands <= 0)
		return;

	/* dequantize noise floor gains (4.6.18.3.5):
	 *   noiseDequant = 2^(NOISE_FLOOR_OFFSET - noiseQuant)
	 *
	 * range of noiseQuant = [0, 30] (see 4.6.18.3.6), NOISE_FLOOR_OFFSET = 6
	 *   so range of noiseDequant = [2^-24, 2^6]
	 */
	do {
		exp = *noiseQuant++;
		scalei = NOISE_FLOOR_OFFSET - exp + FBITS_OUT_DQ_NOISE;	/* 6 + 24 - exp, exp = [0,30] */

		if (scalei < 0)
			*noiseDequant++ = 0;
		else if (scalei < 30)
			*noiseDequant++ = 1 << scalei;
		else
			*noiseDequant++ = 0x3fffffff;	/* leave 2 GB */

	} while (--nBands);
}

/**************************************************************************************
 * Function:    DecodeSBREnvelope
 *
 * Description: decode delta Huffman coded envelope scalefactors from bitstream
 *
 * Inputs:      BitStreamInfo struct pointing to start of env data
 *              initialized PSInfoSBR struct
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current channel (0 for SCE, 0 or 1 for CPE)
 * 
 * Outputs:     dequantized env scalefactors for left channel (before decoupling)
 *              dequantized env scalefactors for right channel (if coupling off)
 *                or raw decoded env scalefactors for right channel (if coupling on)
 *
 * Return:      none
 **************************************************************************************/
void DecodeSBREnvelope(BitStreamInfo *bsi, PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
{
	int huffIndexTime, huffIndexFreq, env, envStartBits, band, nBands, sf, lastEnv;
	int freqRes, freqResPrev, dShift, i;

	if (psi->couplingFlag && ch) {
		dShift = 1;
		if (sbrGrid->ampResFrame) {
			huffIndexTime = HuffTabSBR_tEnv30b;
			huffIndexFreq = HuffTabSBR_fEnv30b;
			envStartBits = 5;
		} else {
			huffIndexTime = HuffTabSBR_tEnv15b;
			huffIndexFreq = HuffTabSBR_fEnv15b;
			envStartBits = 6;
		}
	} else {
		dShift = 0;
		if (sbrGrid->ampResFrame) {
			huffIndexTime = HuffTabSBR_tEnv30;
			huffIndexFreq = HuffTabSBR_fEnv30;
			envStartBits = 6;
		} else {
			huffIndexTime = HuffTabSBR_tEnv15;
			huffIndexFreq = HuffTabSBR_fEnv15;
			envStartBits = 7;
		}
	}

	/* range of envDataQuant[] = [0, 127] (see comments in DequantizeEnvelope() for reference) */
	for (env = 0; env < sbrGrid->numEnv; env++) {
		nBands =      (sbrGrid->freqRes[env] ? sbrFreq->nHigh : sbrFreq->nLow);
		freqRes =     (sbrGrid->freqRes[env]);
		freqResPrev = (env == 0 ? sbrGrid->freqResPrev : sbrGrid->freqRes[env-1]);
		lastEnv =     (env == 0 ? sbrGrid->numEnvPrev-1 : env-1);
		if (lastEnv < 0)
			lastEnv = 0;	/* first frame */

		ASSERT(nBands <= MAX_QMF_BANDS);

		if (sbrChan->deltaFlagEnv[env] == 0) {
			/* delta coding in freq */
			sf = GetBits(bsi, envStartBits) << dShift;
			sbrChan->envDataQuant[env][0] = sf;
			for (band = 1; band < nBands; band++) {
				sf = DecodeOneSymbol(bsi, huffIndexFreq) << dShift;
				sbrChan->envDataQuant[env][band] = sf + sbrChan->envDataQuant[env][band-1];
			}
		} else if (freqRes == freqResPrev) {
			/* delta coding in time - same freq resolution for both frames */
			for (band = 0; band < nBands; band++) {
				sf = DecodeOneSymbol(bsi, huffIndexTime) << dShift;
				sbrChan->envDataQuant[env][band] = sf + sbrChan->envDataQuant[lastEnv][band];
			}
		} else if (freqRes == 0 && freqResPrev == 1) {
			/* delta coding in time - low freq resolution for new frame, high freq resolution for old frame */
			for (band = 0; band < nBands; band++) {
				sf = DecodeOneSymbol(bsi, huffIndexTime) << dShift;
				sbrChan->envDataQuant[env][band] = sf;
				for (i = 0; i < sbrFreq->nHigh; i++) {
					if (sbrFreq->freqHigh[i] == sbrFreq->freqLow[band]) {
						sbrChan->envDataQuant[env][band] += sbrChan->envDataQuant[lastEnv][i];
						break;
					}
				}
			}
		} else if (freqRes == 1 && freqResPrev == 0) {
			/* delta coding in time - high freq resolution for new frame, low freq resolution for old frame */
			for (band = 0; band < nBands; band++) {
				sf = DecodeOneSymbol(bsi, huffIndexTime) << dShift;
				sbrChan->envDataQuant[env][band] = sf;
				for (i = 0; i < sbrFreq->nLow; i++) {
					if (sbrFreq->freqLow[i] <= sbrFreq->freqHigh[band] && sbrFreq->freqHigh[band] < sbrFreq->freqLow[i+1] ) {
						sbrChan->envDataQuant[env][band] += sbrChan->envDataQuant[lastEnv][i];
						break;
					}
				}
			}
		}

		/* skip coupling channel */
		if (ch != 1 || psi->couplingFlag != 1)
			psi->envDataDequantScale[ch][env] = DequantizeEnvelope(nBands, sbrGrid->ampResFrame, sbrChan->envDataQuant[env], psi->envDataDequant[ch][env]);
	}
	sbrGrid->numEnvPrev = sbrGrid->numEnv;
	sbrGrid->freqResPrev = sbrGrid->freqRes[sbrGrid->numEnv-1];
}

/**************************************************************************************
 * Function:    DecodeSBRNoise
 *
 * Description: decode delta Huffman coded noise scalefactors from bitstream
 *
 * Inputs:      BitStreamInfo struct pointing to start of noise data
 *              initialized PSInfoSBR struct
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel
 *              index of current channel (0 for SCE, 0 or 1 for CPE)
 * 
 * Outputs:     dequantized noise scalefactors for left channel (before decoupling)
 *              dequantized noise scalefactors for right channel (if coupling off)
 *                or raw decoded noise scalefactors for right channel (if coupling on)
 *
 * Return:      none
 **************************************************************************************/
void DecodeSBRNoise(BitStreamInfo *bsi, PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChan, int ch)
{
	int huffIndexTime, huffIndexFreq, noiseFloor, band, dShift, sf, lastNoiseFloor;

	if (psi->couplingFlag && ch) {
		dShift = 1;
		huffIndexTime = HuffTabSBR_tNoise30b;
		huffIndexFreq = HuffTabSBR_fNoise30b;
	} else {
		dShift = 0;
		huffIndexTime = HuffTabSBR_tNoise30;
		huffIndexFreq = HuffTabSBR_fNoise30;
	}

	for (noiseFloor = 0; noiseFloor < sbrGrid->numNoiseFloors; noiseFloor++) {
		lastNoiseFloor = (noiseFloor == 0 ? sbrGrid->numNoiseFloorsPrev-1 : noiseFloor-1);
		if (lastNoiseFloor < 0)
			lastNoiseFloor = 0;	/* first frame */

		ASSERT(sbrFreq->numNoiseFloorBands <= MAX_QMF_BANDS);

		if (sbrChan->deltaFlagNoise[noiseFloor] == 0) {
			/* delta coding in freq */
			sbrChan->noiseDataQuant[noiseFloor][0] = GetBits(bsi, 5) << dShift;
			for (band = 1; band < sbrFreq->numNoiseFloorBands; band++) {
				sf = DecodeOneSymbol(bsi, huffIndexFreq) << dShift;
				sbrChan->noiseDataQuant[noiseFloor][band] = sf + sbrChan->noiseDataQuant[noiseFloor][band-1];
			}
		} else {
			/* delta coding in time */
			for (band = 0; band < sbrFreq->numNoiseFloorBands; band++) {
				sf = DecodeOneSymbol(bsi, huffIndexTime) << dShift;
				sbrChan->noiseDataQuant[noiseFloor][band] = sf + sbrChan->noiseDataQuant[lastNoiseFloor][band];
			}
		}

		/* skip coupling channel */
		if (ch != 1 || psi->couplingFlag != 1)
			DequantizeNoise(sbrFreq->numNoiseFloorBands, sbrChan->noiseDataQuant[noiseFloor], psi->noiseDataDequant[ch][noiseFloor]);
	}
	sbrGrid->numNoiseFloorsPrev = sbrGrid->numNoiseFloors;
}

/* dqTabCouple[i] = 2 / (1 + 2^(12 - i)), format = Q30 */
static const int dqTabCouple[25] = {
	0x0007ff80, 0x000ffe00, 0x001ff802, 0x003fe010, 0x007f8080, 0x00fe03f8, 0x01f81f82, 0x03e0f83e, 
	0x07878788, 0x0e38e38e, 0x1999999a, 0x2aaaaaab, 0x40000000, 0x55555555, 0x66666666, 0x71c71c72, 
	0x78787878, 0x7c1f07c2, 0x7e07e07e, 0x7f01fc08, 0x7f807f80, 0x7fc01ff0, 0x7fe007fe, 0x7ff00200, 
	0x7ff80080, 
};

/**************************************************************************************
 * Function:    UncoupleSBREnvelope
 *
 * Description: scale dequantized envelope scalefactors according to channel 
 *                coupling rules
 *
 * Inputs:      initialized PSInfoSBR struct including
 *                dequantized envelope data for left channel
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for right channel including
 *                quantized envelope scalefactors
 * 
 * Outputs:     dequantized envelope data for left channel (after decoupling)
 *              dequantized envelope data for right channel (after decoupling)
 *
 * Return:      none
 **************************************************************************************/
void UncoupleSBREnvelope(PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChanR)
{
	int env, band, nBands, scalei, E_1;

	scalei = (sbrGrid->ampResFrame ? 0 : 1);
	for (env = 0; env < sbrGrid->numEnv; env++) {
		nBands = (sbrGrid->freqRes[env] ? sbrFreq->nHigh : sbrFreq->nLow);
		psi->envDataDequantScale[1][env] = psi->envDataDequantScale[0][env]; /* same scalefactor for L and R */
		for (band = 0; band < nBands; band++) {
			/* clip E_1 to [0, 24] (scalefactors approach 0 or 2) */
			E_1 = sbrChanR->envDataQuant[env][band] >> scalei;
			if (E_1 < 0)	E_1 = 0;
			if (E_1 > 24)	E_1 = 24;

			/* envDataDequant[0] has 1 GB, so << by 2 is okay */
			psi->envDataDequant[1][env][band] = MULSHIFT32(psi->envDataDequant[0][env][band], dqTabCouple[24 - E_1]) << 2;
			psi->envDataDequant[0][env][band] = MULSHIFT32(psi->envDataDequant[0][env][band], dqTabCouple[E_1]) << 2;
		}
	}
}

/**************************************************************************************
 * Function:    UncoupleSBRNoise
 *
 * Description: scale dequantized noise floor scalefactors according to channel 
 *                coupling rules
 *
 * Inputs:      initialized PSInfoSBR struct including
 *                dequantized noise data for left channel
 *              initialized SBRGrid struct for this channel
 *              initialized SBRFreq struct for this SCE/CPE block
 *              initialized SBRChan struct for this channel including
 *                quantized noise scalefactors
 * 
 * Outputs:     dequantized noise data for left channel (after decoupling)
 *              dequantized noise data for right channel (after decoupling)
 *
 * Return:      none
 **************************************************************************************/
void UncoupleSBRNoise(PSInfoSBR *psi, SBRGrid *sbrGrid, SBRFreq *sbrFreq, SBRChan *sbrChanR)
{
	int noiseFloor, band, Q_1;
	
	for (noiseFloor = 0; noiseFloor < sbrGrid->numNoiseFloors; noiseFloor++) {
		for (band = 0; band < sbrFreq->numNoiseFloorBands; band++) {
			/* Q_1 should be in range [0, 24] according to 4.6.18.3.6, but check to make sure */
			Q_1 = sbrChanR->noiseDataQuant[noiseFloor][band];
			if (Q_1 < 0)	Q_1 = 0;
			if (Q_1 > 24)	Q_1 = 24;

			/* noiseDataDequant[0] has 1 GB, so << by 2 is okay */
			psi->noiseDataDequant[1][noiseFloor][band] = MULSHIFT32(psi->noiseDataDequant[0][noiseFloor][band], dqTabCouple[24 - Q_1]) << 2;
			psi->noiseDataDequant[0][noiseFloor][band] = MULSHIFT32(psi->noiseDataDequant[0][noiseFloor][band], dqTabCouple[Q_1]) << 2;
		}
	}
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrimdct.c - inverse MDCT without clipping or interleaving, for input to SBR
 **************************************************************************************/

//#include "coder.h"
//#include "assembly.h"

/**************************************************************************************
 * Function:    DecWindowOverlapNoClip
 *
 * Description: apply synthesis window, do overlap-add without clipping,
 *                for winSequence LONG-LONG
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 32-bit PCM, non-interleaved
 *
 * Return:      none
 *
 * Notes:       use this function when the decoded PCM is going to the SBR decoder
 **************************************************************************************/
void DecWindowOverlapNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev)
{
	int in, w0, w1, f0, f1;
	int *buf1, *over1, *out1;
	const int *wndPrev, *wndCurr;

	buf0 += (1024 >> 1);
	buf1  = buf0  - 1;
	out1  = out0 + 1024 - 1;
	over1 = over0 + 1024 - 1;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);
	if (winTypeCurr == winTypePrev) {
		/* cut window loads in half since current and overlap sections use same symmetric window */
		do {
			w0 = *wndPrev++;
			w1 = *wndPrev++;
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			in = *over0;	
			*out0++ = in - f0;

			in = *over1;	
			*out1-- = in + f1;

			in = *buf1--;
			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	} else {
		/* different windows for current and overlap parts - should still fit in registers on ARM w/o stack spill */
		wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);
		do {
			w0 = *wndPrev++;
			w1 = *wndPrev++;
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			in = *over0;	
			*out0++ = in - f0;

			in = *over1;	
			*out1-- = in + f1;

			w0 = *wndCurr++;
			w1 = *wndCurr++;
			in = *buf1--;

			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	}
}

/**************************************************************************************
 * Function:    DecWindowOverlapLongStart
 *
 * Description: apply synthesis window, do overlap-add, without clipping
 *                for winSequence LONG-START
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 32-bit PCM, non-interleaved
 *
 * Return:      none
 *
 * Notes:       use this function when the decoded PCM is going to the SBR decoder
 **************************************************************************************/
void DecWindowOverlapLongStartNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev)
{
	int i,  in, w0, w1, f0, f1;
	int *buf1, *over1, *out1;
	const int *wndPrev, *wndCurr;

	buf0 += (1024 >> 1);
	buf1  = buf0  - 1;
	out1  = out0 + 1024 - 1;
	over1 = over0 + 1024 - 1;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);
	i = 448;	/* 2 outputs, 2 overlaps per loop */
	do {
		w0 = *wndPrev++;
		w1 = *wndPrev++;
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*out0++ = in - f0;

		in = *over1;	
		*out1-- = in + f1;

		in = *buf1--;

		*over1-- = 0;		/* Wn = 0 for n = (2047, 2046, ... 1600) */
		*over0++ = in >> 1;	/* Wn = 1 for n = (1024, 1025, ... 1471) */
	} while (--i);

	wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);

	/* do 64 more loops - 2 outputs, 2 overlaps per loop */
	do {
		w0 = *wndPrev++;
		w1 = *wndPrev++;
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*out0++ = in - f0;

		in = *over1;	
		*out1-- = in + f1;

		w0 = *wndCurr++;	/* W[0], W[1], ... --> W[255], W[254], ... */
		w1 = *wndCurr++;	/* W[127], W[126], ... --> W[128], W[129], ... */
		in = *buf1--;

		*over1-- = MULSHIFT32(w0, in);	/* Wn = short window for n = (1599, 1598, ... , 1536) */
		*over0++ = MULSHIFT32(w1, in);	/* Wn = short window for n = (1472, 1473, ... , 1535) */
	} while (over0 < over1);
}

/**************************************************************************************
 * Function:    DecWindowOverlapLongStop
 *
 * Description: apply synthesis window, do overlap-add, without clipping
 *                for winSequence LONG-STOP
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 32-bit PCM, non-interleaved
 *
 * Return:      none
 *
 * Notes:       use this function when the decoded PCM is going to the SBR decoder
 **************************************************************************************/
void DecWindowOverlapLongStopNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev)
{
	int i, in, w0, w1, f0, f1;
	int *buf1, *over1, *out1;
	const int *wndPrev, *wndCurr;

	buf0 += (1024 >> 1);
	buf1  = buf0  - 1;
	out1  = out0 + 1024 - 1;
	over1 = over0 + 1024 - 1;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);
	wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[1] : sinWindow + sinWindowOffset[1]);

	i = 448;	/* 2 outputs, 2 overlaps per loop */
	do {
		/* Wn = 0 for n = (0, 1, ... 447) */
		/* Wn = 1 for n = (576, 577, ... 1023) */
		in = *buf0++;
		f1 = in >> 1;	/* scale since skipping multiply by Q31 */

		in = *over0;	
		*out0++ = in;

		in = *over1;	
		*out1-- = in + f1;

		w0 = *wndCurr++;
		w1 = *wndCurr++;
		in = *buf1--;

		*over1-- = MULSHIFT32(w0, in);
		*over0++ = MULSHIFT32(w1, in);
	} while (--i);

	/* do 64 more loops - 2 outputs, 2 overlaps per loop */
	do {
		w0 = *wndPrev++;	/* W[0], W[1], ...W[63] */
		w1 = *wndPrev++;	/* W[127], W[126], ... W[64] */
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*out0++ = in - f0;

		in = *over1;	
		*out1-- = in + f1;

		w0 = *wndCurr++;
		w1 = *wndCurr++;	
		in = *buf1--;

		*over1-- = MULSHIFT32(w0, in);
		*over0++ = MULSHIFT32(w1, in);
	} while (over0 < over1);
}

/**************************************************************************************
 * Function:    DecWindowOverlapShort
 *
 * Description: apply synthesis window, do overlap-add, without clipping
 *                for winSequence EIGHT-SHORT (does all 8 short blocks)
 *
 * Inputs:      input buffer (output of type-IV DCT)
 *              overlap buffer (saved from last time)
 *              window type (sin or KBD) for input buffer
 *              window type (sin or KBD) for overlap buffer
 *
 * Outputs:     one channel, one frame of 32-bit PCM, non-interleaved
 *
 * Return:      none
 *
 * Notes:       use this function when the decoded PCM is going to the SBR decoder
 **************************************************************************************/
void DecWindowOverlapShortNoClip(int *buf0, int *over0, int *out0, int winTypeCurr, int winTypePrev)
{
	int i, in, w0, w1, f0, f1;
	int *buf1, *over1, *out1;
	const int *wndPrev, *wndCurr;

	wndPrev = (winTypePrev == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);
	wndCurr = (winTypeCurr == 1 ? kbdWindow + kbdWindowOffset[0] : sinWindow + sinWindowOffset[0]);

	/* pcm[0-447] = 0 + overlap[0-447] */
	i = 448;
	do {
		f0 = *over0++;
		f1 = *over0++;
		*out0++ = f0;
		*out0++ = f1;
		i -= 2;
	} while (i);

	/* pcm[448-575] = Wp[0-127] * block0[0-127] + overlap[448-575] */
	out1  = out0 + (128 - 1);
	over1 = over0 + 128 - 1;
	buf0 += 64;
	buf1  = buf0  - 1;
	do {
		w0 = *wndPrev++;	/* W[0], W[1], ...W[63] */
		w1 = *wndPrev++;	/* W[127], W[126], ... W[64] */
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in = *over0;	
		*out0++ = in - f0;

		in = *over1;	
		*out1-- = in + f1;

		w0 = *wndCurr++;
		w1 = *wndCurr++;
		in = *buf1--;

		/* save over0/over1 for next short block, in the slots just vacated */
		*over1-- = MULSHIFT32(w0, in);
		*over0++ = MULSHIFT32(w1, in);
	} while (over0 < over1);

	/* pcm[576-703] = Wc[128-255] * block0[128-255] + Wc[0-127] * block1[0-127] + overlap[576-703] 
	 * pcm[704-831] = Wc[128-255] * block1[128-255] + Wc[0-127] * block2[0-127] + overlap[704-831] 
	 * pcm[832-959] = Wc[128-255] * block2[128-255] + Wc[0-127] * block3[0-127] + overlap[832-959] 
	 */
	for (i = 0; i < 3; i++) {
		out0 += 64;
		out1 = out0 + 128 - 1;
		over0 += 64;
		over1 = over0 + 128 - 1;
		buf0 += 64;
		buf1 = buf0 - 1;
		wndCurr -= 128;

		do {
			w0 = *wndCurr++;	/* W[0], W[1], ...W[63] */
			w1 = *wndCurr++;	/* W[127], W[126], ... W[64] */
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			in  = *(over0 - 128);	/* from last short block */
			in += *(over0 + 0);		/* from last full frame */
			*out0++ = in - f0;

			in  = *(over1 - 128);	/* from last short block */
			in += *(over1 + 0);		/* from last full frame */
			*out1-- = in + f1;

			/* save over0/over1 for next short block, in the slots just vacated */
			in = *buf1--;
			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	}

	/* pcm[960-1023] = Wc[128-191] * block3[128-191] + Wc[0-63]   * block4[0-63] + overlap[960-1023]  
	 * over[0-63]    = Wc[192-255] * block3[192-255] + Wc[64-127] * block4[64-127]
	 */
	out0 += 64;
	over0 -= 832;				/* points at overlap[64] */
	over1 = over0 + 128 - 1;	/* points at overlap[191] */
	buf0 += 64;
	buf1 = buf0 - 1;
	wndCurr -= 128;
	do {
		w0 = *wndCurr++;	/* W[0], W[1], ...W[63] */
		w1 = *wndCurr++;	/* W[127], W[126], ... W[64] */
		in = *buf0++;

		f0 = MULSHIFT32(w0, in);
		f1 = MULSHIFT32(w1, in);

		in  = *(over0 + 768);	/* from last short block */
		in += *(over0 + 896);	/* from last full frame */
		*out0++ = in - f0;

		in  = *(over1 + 768);	/* from last short block */
		*(over1 - 128) = in + f1;

		in = *buf1--;
		*over1-- = MULSHIFT32(w0, in);	/* save in overlap[128-191] */
		*over0++ = MULSHIFT32(w1, in);	/* save in overlap[64-127] */
	} while (over0 < over1);
	
	/* over0 now points at overlap[128] */
	
	/* over[64-191]   = Wc[128-255] * block4[128-255] + Wc[0-127] * block5[0-127] 
	 * over[192-319]  = Wc[128-255] * block5[128-255] + Wc[0-127] * block6[0-127]
	 * over[320-447]  = Wc[128-255] * block6[128-255] + Wc[0-127] * block7[0-127]  
	 * over[448-576]  = Wc[128-255] * block7[128-255]
	 */
	for (i = 0; i < 3; i++) {
		over0 += 64;
		over1 = over0 + 128 - 1;
		buf0 += 64;
		buf1 = buf0 - 1;
		wndCurr -= 128;
		do {
			w0 = *wndCurr++;	/* W[0], W[1], ...W[63] */
			w1 = *wndCurr++;	/* W[127], W[126], ... W[64] */
			in = *buf0++;

			f0 = MULSHIFT32(w0, in);
			f1 = MULSHIFT32(w1, in);

			/* from last short block */
			*(over0 - 128) -= f0;
			*(over1 - 128)+= f1;

			in = *buf1--;
			*over1-- = MULSHIFT32(w0, in);
			*over0++ = MULSHIFT32(w1, in);
		} while (over0 < over1);
	}

	/* over[576-1024] = 0 */ 
	i = 448;
	over0 += 64;
	do {
		*over0++ = 0;
		*over0++ = 0;
		*over0++ = 0;
		*over0++ = 0;
		i -= 4;
	} while (i);
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrmath.c - fixed-point math functions for SBR
 **************************************************************************************/

//#include "sbr.h"
//#include "assembly.h"

#define Q28_2	0x20000000	/* Q28: 2.0 */
#define Q28_15	0x30000000	/* Q28: 1.5 */

#define NUM_ITER_IRN		5

/**************************************************************************************
 * Function:    InvRNormalized
 *
 * Description: use Newton's method to solve for x = 1/r
 *
 * Inputs:      r = Q31, range = [0.5, 1) (normalize your inputs to this range)
 *
 * Outputs:     none
 *
 * Return:      x = Q29, range ~= [1.0, 2.0]
 *
 * Notes:       guaranteed to converge and not overflow for any r in [0.5, 1)
 * 
 *              xn+1  = xn - f(xn)/f'(xn)
 *              f(x)  = 1/r - x = 0 (find root)
 *                    = 1/x - r
 *              f'(x) = -1/x^2
 *
 *              so xn+1 = xn - (1/xn - r) / (-1/xn^2)
 *                      = xn * (2 - r*xn)
 *
 *              NUM_ITER_IRN = 2, maxDiff = 6.2500e-02 (precision of about 4 bits)
 *              NUM_ITER_IRN = 3, maxDiff = 3.9063e-03 (precision of about 8 bits)
 *              NUM_ITER_IRN = 4, maxDiff = 1.5288e-05 (precision of about 16 bits)
 *              NUM_ITER_IRN = 5, maxDiff = 3.0034e-08 (precision of about 24 bits)
 **************************************************************************************/
int InvRNormalized(int r)
{
	int i, xn, t;

	/* r =   [0.5, 1.0) 
	 * 1/r = (1.0, 2.0] 
	 *   so use 1.5 as initial guess 
	 */
	xn = Q28_15;

	/* xn = xn*(2.0 - r*xn) */
	for (i = NUM_ITER_IRN; i != 0; i--) {
		t = MULSHIFT32(r, xn);			/* Q31*Q29 = Q28 */
		t = Q28_2 - t;					/* Q28 */
		xn = MULSHIFT32(xn, t) << 4;	/* Q29*Q28 << 4 = Q29 */
	}

	return xn;
}

#define NUM_TERMS_RPI	5
#define LOG2_EXP_INV	0x58b90bfc	/* 1/log2(e), Q31 */

/* invTab[x] = 1/(x+1), format = Q30 */
static const int invTab[NUM_TERMS_RPI] = {0x40000000, 0x20000000, 0x15555555, 0x10000000, 0x0ccccccd};

/**************************************************************************************
 * Function:    RatioPowInv
 *
 * Description: use Taylor (MacLaurin) series expansion to calculate (a/b) ^ (1/c)
 *
 * Inputs:      a = [1, 64], b = [1, 64], c = [1, 64], a >= b
 *
 * Outputs:     none
 *
 * Return:      y = Q24, range ~= [0.015625, 64]
 **************************************************************************************/
int RatioPowInv(int a, int b, int c)
{
	int lna, lnb, i, p, t, y;

	if (a < 1 || b < 1 || c < 1 || a > 64 || b > 64 || c > 64 || a < b)
		return 0;

	lna = MULSHIFT32(log2Tab[a], LOG2_EXP_INV) << 1;	/* ln(a), Q28 */
	lnb = MULSHIFT32(log2Tab[b], LOG2_EXP_INV) << 1;	/* ln(b), Q28 */
	p = (lna - lnb) / c;	/* Q28 */

	/* sum in Q24 */
	y = (1 << 24);
	t = p >> 4;		/* t = p^1 * 1/1! (Q24)*/
	y += t;

	for (i = 2; i <= NUM_TERMS_RPI; i++) {
		t = MULSHIFT32(invTab[i-1], t) << 2;
		t = MULSHIFT32(p, t) << 4;	/* t = p^i * 1/i! (Q24) */
		y += t;
	}

	return y;
}

/**************************************************************************************
 * Function:    SqrtFix
 *
 * Description: use binary search to calculate sqrt(q)
 *
 * Inputs:      q = Q30
 *              number of fraction bits in input
 *
 * Outputs:     number of fraction bits in output
 *
 * Return:      lo = Q(fBitsOut)
 *
 * Notes:       absolute precision varies depending on fBitsIn
 *              normalizes input to range [0x200000000, 0x7fffffff] and takes 
 *                floor(sqrt(input)), and sets fBitsOut appropriately
 **************************************************************************************/
int SqrtFix(int q, int fBitsIn, int *fBitsOut)
{
	int z, lo, hi, mid;

	if (q <= 0) {
		*fBitsOut = fBitsIn;
		return 0;
	}

	/* force even fBitsIn */
	z = fBitsIn & 0x01;
	q >>= z;
	fBitsIn -= z;

	/* for max precision, normalize to [0x20000000, 0x7fffffff] */
	z = (CLZ(q) - 1);
	z >>= 1;
	q <<= (2*z);

	/* choose initial bounds */
	lo = 1;
	if (q >= 0x10000000)
		lo = 16384;	/* (int)sqrt(0x10000000) */
	hi = 46340;		/* (int)sqrt(0x7fffffff) */

	/* do binary search with 32x32->32 multiply test */
	do {
		mid = (lo + hi) >> 1;
		if (mid*mid > q)
			hi = mid - 1;
		else
			lo = mid + 1;
	} while (hi >= lo);
	lo--;

	*fBitsOut = ((fBitsIn + 2*z) >> 1);
	return lo;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrqmf.c - analysis and synthesis QMF filters for SBR
 **************************************************************************************/

//#include "sbr.h"
//#include "assembly.h"

/* PreMultiply64() table
 * format = Q30
 * reordered for sequential access
 *
 * for (i = 0; i < 64/4; i++) {
 *   angle = (i + 0.25) * M_PI / nmdct;
 *   x = (cos(angle) + sin(angle));
 *   x =  sin(angle);
 * 
 *   angle = (nmdct/2 - 1 - i + 0.25) * M_PI / nmdct;
 *   x = (cos(angle) + sin(angle));
 *   x =  sin(angle);
 * }
 */
static const int cos4sin4tab64[64] = {
	0x40c7d2bd, 0x00c90e90, 0x424ff28f, 0x3ff4e5e0, 0x43cdd89a, 0x03ecadcf, 0x454149fc, 0x3fc395f9,
	0x46aa0d6d, 0x070de172, 0x4807eb4b, 0x3f6af2e3, 0x495aada2, 0x0a2abb59, 0x4aa22036, 0x3eeb3347,
	0x4bde1089, 0x0d415013, 0x4d0e4de2, 0x3e44a5ef, 0x4e32a956, 0x104fb80e, 0x4f4af5d1, 0x3d77b192,
	0x50570819, 0x135410c3, 0x5156b6d9, 0x3c84d496, 0x5249daa2, 0x164c7ddd, 0x53304df6, 0x3b6ca4c4,
	0x5409ed4b, 0x19372a64, 0x54d69714, 0x3a2fcee8, 0x55962bc0, 0x1c1249d8, 0x56488dc5, 0x38cf1669,
	0x56eda1a0, 0x1edc1953, 0x57854ddd, 0x374b54ce, 0x580f7b19, 0x2192e09b, 0x588c1404, 0x35a5793c,
	0x58fb0568, 0x2434f332, 0x595c3e2a, 0x33de87de, 0x59afaf4c, 0x26c0b162, 0x59f54bee, 0x31f79948,
	0x5a2d0957, 0x29348937, 0x5a56deec, 0x2ff1d9c7, 0x5a72c63b, 0x2b8ef77d, 0x5a80baf6, 0x2dce88aa,
};

/* PostMultiply64() table
 * format = Q30
 * reordered for sequential access
 *
 * for (i = 0; i <= (32/2); i++) {
 *   angle = i * M_PI / 64;
 *   x = (cos(angle) + sin(angle));
 *   x = sin(angle);
 * }
 */
static const int cos1sin1tab64[34] = {
	0x40000000, 0x00000000, 0x43103085, 0x0323ecbe, 0x45f704f7, 0x0645e9af, 0x48b2b335, 0x09640837, 
	0x4b418bbe, 0x0c7c5c1e, 0x4da1fab5, 0x0f8cfcbe, 0x4fd288dc, 0x1294062f, 0x51d1dc80, 0x158f9a76, 
	0x539eba45, 0x187de2a7, 0x553805f2, 0x1b5d100a, 0x569cc31b, 0x1e2b5d38, 0x57cc15bc, 0x20e70f32, 
	0x58c542c5, 0x238e7673, 0x5987b08a, 0x261feffa, 0x5a12e720, 0x2899e64a, 0x5a6690ae, 0x2afad269, 
	0x5a82799a, 0x2d413ccd,
};

/**************************************************************************************
 * Function:    PreMultiply64
 *
 * Description: pre-twiddle stage of 64-point DCT-IV
 *
 * Inputs:      buffer of 64 samples
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       minimum 1 GB in, 2 GB out, gains 2 int bits
 *              gbOut = gbIn + 1
 *              output is limited to sqrt(2)/2 plus GB in full GB
 *              uses 3-mul, 3-add butterflies instead of 4-mul, 2-add
 **************************************************************************************/
static void PreMultiply64(int *zbuf1)
{
	int i, ar1, ai1, ar2, ai2, z1, z2;
	int t, cms2, cps2a, sin2a, cps2b, sin2b;
	int *zbuf2;
	const int *csptr;

	zbuf2 = zbuf1 + 64 - 1;
	csptr = cos4sin4tab64;

	/* whole thing should fit in registers - verify that compiler does this */
	for (i = 64 >> 2; i != 0; i--) {
		/* cps2 = (cos+sin), sin2 = sin, cms2 = (cos-sin) */
		cps2a = *csptr++;	
		sin2a = *csptr++;
		cps2b = *csptr++;	
		sin2b = *csptr++;

		ar1 = *(zbuf1 + 0);
		ai2 = *(zbuf1 + 1);
		ai1 = *(zbuf2 + 0);
		ar2 = *(zbuf2 - 1);

		/* gain 2 ints bit from MULSHIFT32 by Q30
		 * max per-sample gain (ignoring implicit scaling) = MAX(sin(angle)+cos(angle)) = 1.414
		 * i.e. gain 1 GB since worst case is sin(angle) = cos(angle) = 0.707 (Q30), gain 2 from
		 *   extra sign bits, and eat one in adding
		 */
		t  = MULSHIFT32(sin2a, ar1 + ai1);
		z2 = MULSHIFT32(cps2a, ai1) - t;
		cms2 = cps2a - 2*sin2a;
		z1 = MULSHIFT32(cms2, ar1) + t;
		*zbuf1++ = z1;	/* cos*ar1 + sin*ai1 */
		*zbuf1++ = z2;	/* cos*ai1 - sin*ar1 */

		t  = MULSHIFT32(sin2b, ar2 + ai2);
		z2 = MULSHIFT32(cps2b, ai2) - t;
		cms2 = cps2b - 2*sin2b;
		z1 = MULSHIFT32(cms2, ar2) + t;
		*zbuf2-- = z2;	/* cos*ai2 - sin*ar2 */
		*zbuf2-- = z1;	/* cos*ar2 + sin*ai2 */
	}
}

/**************************************************************************************
 * Function:    PostMultiply64
 *
 * Description: post-twiddle stage of 64-point type-IV DCT
 *
 * Inputs:      buffer of 64 samples
 *              number of output samples to calculate
 *
 * Outputs:     processed samples in same buffer
 *
 * Return:      none
 *
 * Notes:       minimum 1 GB in, 2 GB out, gains 2 int bits
 *              gbOut = gbIn + 1
 *              output is limited to sqrt(2)/2 plus GB in full GB
 *              nSampsOut is rounded up to next multiple of 4, since we calculate
 *                4 samples per loop
 **************************************************************************************/
static void PostMultiply64(int *fft1, int nSampsOut)
{
	int i, ar1, ai1, ar2, ai2;
	int t, cms2, cps2, sin2;
	int *fft2;
	const int *csptr;

	csptr = cos1sin1tab64;
	fft2 = fft1 + 64 - 1;

	/* load coeffs for first pass
	 * cps2 = (cos+sin)/2, sin2 = sin/2, cms2 = (cos-sin)/2
	 */
	cps2 = *csptr++;
	sin2 = *csptr++;
	cms2 = cps2 - 2*sin2;

	for (i = (nSampsOut + 3) >> 2; i != 0; i--) {
		ar1 = *(fft1 + 0);
		ai1 = *(fft1 + 1);
		ar2 = *(fft2 - 1);
		ai2 = *(fft2 + 0);

		/* gain 2 int bits (multiplying by Q30), max gain = sqrt(2) */
		t = MULSHIFT32(sin2, ar1 + ai1);
		*fft2-- = t - MULSHIFT32(cps2, ai1);
		*fft1++ = t + MULSHIFT32(cms2, ar1);

		cps2 = *csptr++;
		sin2 = *csptr++;

		ai2 = -ai2;
		t = MULSHIFT32(sin2, ar2 + ai2);
		*fft2-- = t - MULSHIFT32(cps2, ai2);
		cms2 = cps2 - 2*sin2;
		*fft1++ = t + MULSHIFT32(cms2, ar2);
	}
}

/**************************************************************************************
 * Function:    QMFAnalysisConv
 *
 * Description: convolution kernel for analysis QMF 
 *
 * Inputs:      pointer to coefficient table, reordered for sequential access
 *              delay buffer of size 32*10 = 320 real-valued PCM samples
 *              index for delay ring buffer (range = [0, 9])
 *
 * Outputs:     64 consecutive 32-bit samples
 *
 * Return:      none
 *
 * Notes:       this is carefully written to be efficient on ARM
 *              use the assembly code version in sbrqmfak.s when building for ARM!
 **************************************************************************************/
#if (defined (__arm) && defined (__ARMCC_VERSION)) || (defined (_WIN32) && defined (_WIN32_WCE) && defined (ARM)) || (defined(__GNUC__) && defined(__arm__))
#ifdef __cplusplus
extern "C"
#endif
void QMFAnalysisConv(int *cTab, int *delay, int dIdx, int *uBuf);
#else
void QMFAnalysisConv(int *cTab, int *delay, int dIdx, int *uBuf)
{
	int k, dOff;
	int *cPtr0, *cPtr1;
	U64 u64lo, u64hi;

	dOff = dIdx*32 + 31;
	cPtr0 = cTab;
	cPtr1 = cTab + 33*5 - 1;

	/* special first pass since we need to flip sign to create cTab[384], cTab[512] */
	u64lo.w64 = 0;
	u64hi.w64 = 0;
	u64lo.w64 = MADD64(u64lo.w64,  *cPtr0++,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64hi.w64 = MADD64(u64hi.w64,  *cPtr0++,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64lo.w64 = MADD64(u64lo.w64,  *cPtr0++,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64hi.w64 = MADD64(u64hi.w64,  *cPtr0++,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64lo.w64 = MADD64(u64lo.w64,  *cPtr0++,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64hi.w64 = MADD64(u64hi.w64,  *cPtr1--,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64lo.w64 = MADD64(u64lo.w64, -(*cPtr1--), delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64hi.w64 = MADD64(u64hi.w64,  *cPtr1--,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64lo.w64 = MADD64(u64lo.w64, -(*cPtr1--), delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
	u64hi.w64 = MADD64(u64hi.w64,  *cPtr1--,   delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}

	uBuf[0]  = u64lo.r.hi32;
	uBuf[32] = u64hi.r.hi32;
	uBuf++;
	dOff--;

	/* max gain for any sample in uBuf, after scaling by cTab, ~= 0.99 
	 * so we can just sum the uBuf values with no overflow problems
	 */
	for (k = 1; k <= 31; k++) {
		u64lo.w64 = 0;
		u64hi.w64 = 0;
		u64lo.w64 = MADD64(u64lo.w64, *cPtr0++, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64hi.w64 = MADD64(u64hi.w64, *cPtr0++, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64lo.w64 = MADD64(u64lo.w64, *cPtr0++, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64hi.w64 = MADD64(u64hi.w64, *cPtr0++, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64lo.w64 = MADD64(u64lo.w64, *cPtr0++, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64hi.w64 = MADD64(u64hi.w64, *cPtr1--, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64lo.w64 = MADD64(u64lo.w64, *cPtr1--, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64hi.w64 = MADD64(u64hi.w64, *cPtr1--, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64lo.w64 = MADD64(u64lo.w64, *cPtr1--, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}
		u64hi.w64 = MADD64(u64hi.w64, *cPtr1--, delay[dOff]);	dOff -= 32; if (dOff < 0) {dOff += 320;}

		uBuf[0]  = u64lo.r.hi32;
		uBuf[32] = u64hi.r.hi32;
		uBuf++;
		dOff--;
	}
}
#endif

/**************************************************************************************
 * Function:    QMFAnalysis
 *
 * Description: 32-subband analysis QMF (4.6.18.4.1)
 *
 * Inputs:      32 consecutive samples of decoded 32-bit PCM, format = Q(fBitsIn)
 *              delay buffer of size 32*10 = 320 PCM samples
 *              number of fraction bits in input PCM
 *              index for delay ring buffer (range = [0, 9])
 *              number of subbands to calculate (range = [0, 32])
 *
 * Outputs:     qmfaBands complex subband samples, format = Q(FBITS_OUT_QMFA)
 *              updated delay buffer
 *              updated delay index
 *
 * Return:      guard bit mask
 *
 * Notes:       output stored as RE{X0}, IM{X0}, RE{X1}, IM{X1}, ... RE{X31}, IM{X31}
 *              output stored in int buffer of size 64*2 = 128 
 *                (zero-filled from XBuf[2*qmfaBands] to XBuf[127])
 **************************************************************************************/
int QMFAnalysis(int *inbuf, int *delay, int *XBuf, int fBitsIn, int *delayIdx, int qmfaBands)
{
	int n, y, shift, gbMask;
	int *delayPtr, *uBuf, *tBuf;

	/* use XBuf[128] as temp buffer for reordering */
	uBuf = XBuf;		/* first 64 samples */
	tBuf = XBuf + 64;	/* second 64 samples */

	/* overwrite oldest PCM with new PCM
	 * delay[n] has 1 GB after shifting (either << or >>)
	 */
	delayPtr = delay + (*delayIdx * 32);
	if (fBitsIn > FBITS_IN_QMFA) {
		shift = MIN(fBitsIn - FBITS_IN_QMFA, 31);
		for (n = 32; n != 0; n--) {
			y = (*inbuf) >> shift;
			inbuf++;
			*delayPtr++ = y;
		}
	} else {
		shift = MIN(FBITS_IN_QMFA - fBitsIn, 30);
		for (n = 32; n != 0; n--) {
			y = *inbuf++;
			CLIP_2N_SHIFT30(y, shift);
			*delayPtr++ = y;
		}
	}
	
	QMFAnalysisConv((int *)cTabA, delay, *delayIdx, uBuf);
	
	/* uBuf has at least 2 GB right now (1 from clipping to Q(FBITS_IN_QMFA), one from
	 *   the scaling by cTab (MULSHIFT32(*delayPtr--, *cPtr++), with net gain of < 1.0)
	 * TODO - fuse with QMFAnalysisConv to avoid separate reordering
	 */
    tBuf[2*0 + 0] = uBuf[0];
    tBuf[2*0 + 1] = uBuf[1];
    for (n = 1; n < 31; n++) {
        tBuf[2*n + 0] = -uBuf[64-n];
        tBuf[2*n + 1] =  uBuf[n+1];
    }
    tBuf[2*31 + 1] =  uBuf[32];
    tBuf[2*31 + 0] = -uBuf[33];
	
	/* fast in-place DCT-IV - only need 2*qmfaBands output samples */
	PreMultiply64(tBuf);	/* 2 GB in, 3 GB out */
	FFT32C(tBuf);			/* 3 GB in, 1 GB out */
	PostMultiply64(tBuf, qmfaBands*2);	/* 1 GB in, 2 GB out */

	/* TODO - roll into PostMultiply (if enough registers) */
	gbMask = 0;
	for (n = 0; n < qmfaBands; n++) {
		XBuf[2*n+0] =  tBuf[ n + 0];	/* implicit scaling of 2 in our output Q format */
		gbMask |= FASTABS(XBuf[2*n+0]);
		XBuf[2*n+1] = -tBuf[63 - n];
		gbMask |= FASTABS(XBuf[2*n+1]);
	}

	/* fill top section with zeros for HF generation */
	for (    ; n < 64; n++) {
		XBuf[2*n+0] = 0;
		XBuf[2*n+1] = 0;
	}

	*delayIdx = (*delayIdx == NUM_QMF_DELAY_BUFS - 1 ? 0 : *delayIdx + 1);

	/* minimum of 2 GB in output */
	return gbMask;
}

/* lose FBITS_LOST_DCT4_64 in DCT4, gain 6 for implicit scaling by 1/64, lose 1 for cTab multiply (Q31) */
#define FBITS_OUT_QMFS	(FBITS_IN_QMFS - FBITS_LOST_DCT4_64 + 6 - 1)
#define RND_VAL_Q			(1 << (FBITS_OUT_QMFS-1))

/**************************************************************************************
 * Function:    QMFSynthesisConv
 *
 * Description: final convolution kernel for synthesis QMF 
 *
 * Inputs:      pointer to coefficient table, reordered for sequential access
 *              delay buffer of size 64*10 = 640 complex samples (1280 ints)
 *              index for delay ring buffer (range = [0, 9])
 *              number of QMF subbands to process (range = [0, 64])
 *              number of channels
 *
 * Outputs:     64 consecutive 16-bit PCM samples, interleaved by factor of nChans
 *
 * Return:      none
 *
 * Notes:       this is carefully written to be efficient on ARM
 *              use the assembly code version in sbrqmfsk.s when building for ARM!
 **************************************************************************************/
#if (defined (__arm) && defined (__ARMCC_VERSION)) || (defined (_WIN32) && defined (_WIN32_WCE) && defined (ARM)) || (defined(__GNUC__) && defined(__arm__))
#ifdef __cplusplus
extern "C"
#endif
void QMFSynthesisConv(int *cPtr, int *delay, int dIdx, short *outbuf, int nChans);
#else
void QMFSynthesisConv(int *cPtr, int *delay, int dIdx, short *outbuf, int nChans)
{
	int k, dOff0, dOff1;
	U64 sum64;

	dOff0 = (dIdx)*128;
	dOff1 = dOff0 - 1;
	if (dOff1 < 0)
		dOff1 += 1280;

	/* scaling note: total gain of coefs (cPtr[0]-cPtr[9] for any k) is < 2.0, so 1 GB in delay values is adequate */
	for (k = 0; k <= 63; k++) {
		sum64.w64 = 0;
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff0]);	dOff0 -= 256; if (dOff0 < 0) {dOff0 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff1]);	dOff1 -= 256; if (dOff1 < 0) {dOff1 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff0]);	dOff0 -= 256; if (dOff0 < 0) {dOff0 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff1]);	dOff1 -= 256; if (dOff1 < 0) {dOff1 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff0]);	dOff0 -= 256; if (dOff0 < 0) {dOff0 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff1]);	dOff1 -= 256; if (dOff1 < 0) {dOff1 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff0]);	dOff0 -= 256; if (dOff0 < 0) {dOff0 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff1]);	dOff1 -= 256; if (dOff1 < 0) {dOff1 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff0]);	dOff0 -= 256; if (dOff0 < 0) {dOff0 += 1280;}
		sum64.w64 = MADD64(sum64.w64, *cPtr++, delay[dOff1]);	dOff1 -= 256; if (dOff1 < 0) {dOff1 += 1280;}

		dOff0++;
		dOff1--;
		*outbuf = CLIPTOSHORT((sum64.r.hi32 + RND_VAL_Q) >> FBITS_OUT_QMFS);
		outbuf += nChans;
	}
}
#endif

/**************************************************************************************
 * Function:    QMFSynthesis
 *
 * Description: 64-subband synthesis QMF (4.6.18.4.2)
 *
 * Inputs:      64 consecutive complex subband QMF samples, format = Q(FBITS_IN_QMFS)
 *              delay buffer of size 64*10 = 640 complex samples (1280 ints)
 *              index for delay ring buffer (range = [0, 9])
 *              number of QMF subbands to process (range = [0, 64])
 *              number of channels
 *
 * Outputs:     64 consecutive 16-bit PCM samples, interleaved by factor of nChans
 *              updated delay buffer
 *              updated delay index
 *
 * Return:      none
 *
 * Notes:       assumes MIN_GBITS_IN_QMFS guard bits in input, either from
 *                QMFAnalysis (if upsampling only) or from MapHF (if SBR on)
 **************************************************************************************/
void QMFSynthesis(int *inbuf, int *delay, int *delayIdx, int qmfsBands, short *outbuf, int nChans)
{
	int n, a0, a1, b0, b1, dOff0, dOff1, dIdx;
	int *tBufLo, *tBufHi;

	dIdx = *delayIdx;
	tBufLo = delay + dIdx*128 + 0;
	tBufHi = delay + dIdx*128 + 127;

	/* reorder inputs to DCT-IV, only use first qmfsBands (complex) samples 
	 * TODO - fuse with PreMultiply64 to avoid separate reordering steps
	 */
    for (n = 0; n < qmfsBands >> 1; n++) {
		a0 = *inbuf++;
		b0 = *inbuf++;
		a1 = *inbuf++;
		b1 = *inbuf++;
		*tBufLo++ = a0;
        *tBufLo++ = a1;
        *tBufHi-- = b0;
        *tBufHi-- = b1;
    }
	if (qmfsBands & 0x01) {
		a0 = *inbuf++;
		b0 = *inbuf++;
		*tBufLo++ = a0;
        *tBufHi-- = b0;
        *tBufLo++ = 0;
		*tBufHi-- = 0;
		n++;
	}
    for (     ; n < 32; n++) {
		*tBufLo++ = 0;
        *tBufHi-- = 0;
        *tBufLo++ = 0;
        *tBufHi-- = 0;
	}

	tBufLo = delay + dIdx*128 + 0;
	tBufHi = delay + dIdx*128 + 64;

	/* 2 GB in, 3 GB out */
	PreMultiply64(tBufLo);
	PreMultiply64(tBufHi);

	/* 3 GB in, 1 GB out */
	FFT32C(tBufLo);
	FFT32C(tBufHi);

	/* 1 GB in, 2 GB out */
	PostMultiply64(tBufLo, 64);
	PostMultiply64(tBufHi, 64);

	/* could fuse with PostMultiply64 to avoid separate pass */
	dOff0 = dIdx*128;
	dOff1 = dIdx*128 + 64;
	for (n = 32; n != 0; n--) {
		a0 =  (*tBufLo++);
		a1 =  (*tBufLo++);
		b0 =  (*tBufHi++);
		b1 = -(*tBufHi++);

		delay[dOff0++] = (b0 - a0);
		delay[dOff0++] = (b1 - a1);
		delay[dOff1++] = (b0 + a0);
		delay[dOff1++] = (b1 + a1);
	}

	QMFSynthesisConv((int *)cTabS, delay, dIdx, outbuf, nChans);

	*delayIdx = (*delayIdx == NUM_QMF_DELAY_BUFS - 1 ? 0 : *delayIdx + 1);
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbrside.c - functions for unpacking side info from SBR bitstream
 **************************************************************************************/

//#include "sbr.h"

/**************************************************************************************
 * Function:    GetSampRateIdx
 *
 * Description: get index of given sample rate
 *
 * Inputs:      sample rate (in Hz)
 *
 * Outputs:     none
 *
 * Return:      index of sample rate (table 1.15 in 14496-3:2001(E))
 *              -1 if sample rate not found in table
 **************************************************************************************/
int GetSampRateIdx(int sampRate)
{
	int idx;

	for (idx = 0; idx < NUM_SAMPLE_RATES; idx++) {
		if (sampRate == sampRateTab[idx])
			return idx;
	}

	return -1;
}

/**************************************************************************************
 * Function:    UnpackSBRHeader
 *
 * Description: unpack SBR header (table 4.56)
 *
 * Inputs:      BitStreamInfo struct pointing to start of SBR header
 *
 * Outputs:     initialized SBRHeader struct for this SCE/CPE block
 *
 * Return:      non-zero if frame reset is triggered, zero otherwise
 **************************************************************************************/
int UnpackSBRHeader(BitStreamInfo *bsi, SBRHeader *sbrHdr)
{
	SBRHeader sbrHdrPrev;

	/* save previous values so we know whether to reset decoder */
	sbrHdrPrev.startFreq =     sbrHdr->startFreq;
	sbrHdrPrev.stopFreq =      sbrHdr->stopFreq;
	sbrHdrPrev.freqScale =     sbrHdr->freqScale;
	sbrHdrPrev.alterScale =    sbrHdr->alterScale;
	sbrHdrPrev.crossOverBand = sbrHdr->crossOverBand;
	sbrHdrPrev.noiseBands =    sbrHdr->noiseBands;

	sbrHdr->ampRes =        GetBits(bsi, 1);
	sbrHdr->startFreq =     GetBits(bsi, 4);
	sbrHdr->stopFreq =      GetBits(bsi, 4);
	sbrHdr->crossOverBand = GetBits(bsi, 3);
	sbrHdr->resBitsHdr =    GetBits(bsi, 2);
	sbrHdr->hdrExtra1 =     GetBits(bsi, 1);
	sbrHdr->hdrExtra2 =     GetBits(bsi, 1);

	if (sbrHdr->hdrExtra1) {
		sbrHdr->freqScale =    GetBits(bsi, 2);
		sbrHdr->alterScale =   GetBits(bsi, 1);
		sbrHdr->noiseBands =   GetBits(bsi, 2);
	} else {
		/* defaults */
		sbrHdr->freqScale =    2;
		sbrHdr->alterScale =   1;
		sbrHdr->noiseBands =   2;
	}

	if (sbrHdr->hdrExtra2) {
		sbrHdr->limiterBands = GetBits(bsi, 2);
		sbrHdr->limiterGains = GetBits(bsi, 2);
		sbrHdr->interpFreq =   GetBits(bsi, 1);
		sbrHdr->smoothMode =   GetBits(bsi, 1);
	} else {
		/* defaults */
		sbrHdr->limiterBands = 2;
		sbrHdr->limiterGains = 2;
		sbrHdr->interpFreq =   1;
		sbrHdr->smoothMode =   1;
	}
	sbrHdr->count++;

	/* if any of these have changed from previous frame, reset the SBR module */
	if (sbrHdr->startFreq != sbrHdrPrev.startFreq || sbrHdr->stopFreq != sbrHdrPrev.stopFreq ||
		sbrHdr->freqScale != sbrHdrPrev.freqScale || sbrHdr->alterScale != sbrHdrPrev.alterScale ||
		sbrHdr->crossOverBand != sbrHdrPrev.crossOverBand || sbrHdr->noiseBands != sbrHdrPrev.noiseBands
		)
		return -1;
	else
		return 0;
}

/* cLog2[i] = ceil(log2(i)) (disregard i == 0) */
static const unsigned char cLog2[9] = {0, 0, 1, 2, 2, 3, 3, 3, 3};

/**************************************************************************************
 * Function:    UnpackSBRGrid
 *
 * Description: unpack SBR grid (table 4.62)
 *
 * Inputs:      BitStreamInfo struct pointing to start of SBR grid
 *              initialized SBRHeader struct for this SCE/CPE block
 * 
 * Outputs:     initialized SBRGrid struct for this channel
 *
 * Return:      none
 **************************************************************************************/
static void UnpackSBRGrid(BitStreamInfo *bsi, SBRHeader *sbrHdr, SBRGrid *sbrGrid)
{
	int numEnvRaw, env, rel, pBits, border, middleBorder=0;
	unsigned char relBordLead[MAX_NUM_ENV], relBordTrail[MAX_NUM_ENV];
	unsigned char relBorder0[3], relBorder1[3], relBorder[3];
	unsigned char numRelBorder0, numRelBorder1, numRelBorder, numRelLead=0, numRelTrail;
	unsigned char absBordLead=0, absBordTrail=0, absBorder;
	
	sbrGrid->ampResFrame = sbrHdr->ampRes;
	sbrGrid->frameClass = GetBits(bsi, 2);
	switch (sbrGrid->frameClass) {

	case SBR_GRID_FIXFIX:
		numEnvRaw = GetBits(bsi, 2);
		sbrGrid->numEnv = (1 << numEnvRaw);
		if (sbrGrid->numEnv == 1)
			sbrGrid->ampResFrame = 0;

		ASSERT(sbrGrid->numEnv == 1 || sbrGrid->numEnv == 2 || sbrGrid->numEnv == 4);

		sbrGrid->freqRes[0] = GetBits(bsi, 1);
		for (env = 1; env < sbrGrid->numEnv; env++)
			 sbrGrid->freqRes[env] = sbrGrid->freqRes[0];

		absBordLead =  0;
		absBordTrail = NUM_TIME_SLOTS;
		numRelLead =   sbrGrid->numEnv - 1;
		numRelTrail =  0;

		/* numEnv = 1, 2, or 4 */
		if (sbrGrid->numEnv == 1)		border = NUM_TIME_SLOTS / 1;
		else if (sbrGrid->numEnv == 2)	border = NUM_TIME_SLOTS / 2;
		else							border = NUM_TIME_SLOTS / 4;

		for (rel = 0; rel < numRelLead; rel++)
			relBordLead[rel] = border;

		middleBorder = (sbrGrid->numEnv >> 1);

		break;

	case SBR_GRID_FIXVAR:
		absBorder = GetBits(bsi, 2) + NUM_TIME_SLOTS;
		numRelBorder = GetBits(bsi, 2);
		sbrGrid->numEnv = numRelBorder + 1;
		for (rel = 0; rel < numRelBorder; rel++)
			relBorder[rel] = 2*GetBits(bsi, 2) + 2;

		pBits = cLog2[sbrGrid->numEnv + 1];
		sbrGrid->pointer = GetBits(bsi, pBits);

		for (env = sbrGrid->numEnv - 1; env >= 0; env--)
			sbrGrid->freqRes[env] = GetBits(bsi, 1);

		absBordLead =  0;
		absBordTrail = absBorder;
		numRelLead =   0;
		numRelTrail =  numRelBorder;

		for (rel = 0; rel < numRelTrail; rel++)
			relBordTrail[rel] = relBorder[rel];

		if (sbrGrid->pointer > 1)			middleBorder = sbrGrid->numEnv + 1 - sbrGrid->pointer;
		else								middleBorder = sbrGrid->numEnv - 1;

		break;

	case SBR_GRID_VARFIX:
		absBorder = GetBits(bsi, 2);
		numRelBorder = GetBits(bsi, 2);
		sbrGrid->numEnv = numRelBorder + 1;
		for (rel = 0; rel < numRelBorder; rel++)
			relBorder[rel] = 2*GetBits(bsi, 2) + 2;

		pBits = cLog2[sbrGrid->numEnv + 1];
		sbrGrid->pointer = GetBits(bsi, pBits);

		for (env = 0; env < sbrGrid->numEnv; env++)
			sbrGrid->freqRes[env] = GetBits(bsi, 1);

		absBordLead =  absBorder;
		absBordTrail = NUM_TIME_SLOTS;
		numRelLead =   numRelBorder;
		numRelTrail =  0;

		for (rel = 0; rel < numRelLead; rel++)
			relBordLead[rel] = relBorder[rel];

		if (sbrGrid->pointer == 0)			middleBorder = 1;
		else if (sbrGrid->pointer == 1)		middleBorder = sbrGrid->numEnv - 1;
		else								middleBorder = sbrGrid->pointer - 1;

		break;

	case SBR_GRID_VARVAR:
		absBordLead =   GetBits(bsi, 2);	/* absBorder0 */
		absBordTrail =  GetBits(bsi, 2) + NUM_TIME_SLOTS;	/* absBorder1 */
		numRelBorder0 = GetBits(bsi, 2);
		numRelBorder1 = GetBits(bsi, 2);

		sbrGrid->numEnv = numRelBorder0 + numRelBorder1 + 1;
		ASSERT(sbrGrid->numEnv <= 5);

		for (rel = 0; rel < numRelBorder0; rel++)
			relBorder0[rel] = 2*GetBits(bsi, 2) + 2;

		for (rel = 0; rel < numRelBorder1; rel++)
			relBorder1[rel] = 2*GetBits(bsi, 2) + 2;

		pBits = cLog2[numRelBorder0 + numRelBorder1 + 2];
		sbrGrid->pointer = GetBits(bsi, pBits);

		for (env = 0; env < sbrGrid->numEnv; env++)
			sbrGrid->freqRes[env] = GetBits(bsi, 1);

		numRelLead =  numRelBorder0;
		numRelTrail = numRelBorder1;

		for (rel = 0; rel < numRelLead; rel++)
			relBordLead[rel] = relBorder0[rel];

		for (rel = 0; rel < numRelTrail; rel++)
			relBordTrail[rel] = relBorder1[rel];

		if (sbrGrid->pointer > 1)			middleBorder = sbrGrid->numEnv + 1 - sbrGrid->pointer;
		else								middleBorder = sbrGrid->numEnv - 1;

		break;
	}

	/* build time border vector */
	sbrGrid->envTimeBorder[0] = absBordLead * SAMPLES_PER_SLOT;

	rel = 0;
	border = absBordLead;
	for (env = 1; env <= numRelLead; env++) {
		border += relBordLead[rel++];
		sbrGrid->envTimeBorder[env] = border * SAMPLES_PER_SLOT;
	}

	rel = 0;
	border = absBordTrail;
	for (env = sbrGrid->numEnv - 1; env > numRelLead; env--) {
		border -= relBordTrail[rel++];
		sbrGrid->envTimeBorder[env] = border * SAMPLES_PER_SLOT;
	}

	sbrGrid->envTimeBorder[sbrGrid->numEnv] = absBordTrail * SAMPLES_PER_SLOT;

	if (sbrGrid->numEnv > 1) {
		sbrGrid->numNoiseFloors = 2;
		sbrGrid->noiseTimeBorder[0] = sbrGrid->envTimeBorder[0];
		sbrGrid->noiseTimeBorder[1] = sbrGrid->envTimeBorder[middleBorder];
		sbrGrid->noiseTimeBorder[2] = sbrGrid->envTimeBorder[sbrGrid->numEnv];
	} else {
		sbrGrid->numNoiseFloors = 1;
		sbrGrid->noiseTimeBorder[0] = sbrGrid->envTimeBorder[0];
		sbrGrid->noiseTimeBorder[1] = sbrGrid->envTimeBorder[1];
	}
}

/**************************************************************************************
 * Function:    UnpackDeltaTimeFreq
 *
 * Description: unpack time/freq flags for delta coding of SBR envelopes (table 4.63)
 *
 * Inputs:      BitStreamInfo struct pointing to start of dt/df flags
 *              number of envelopes
 *              number of noise floors
 * 
 * Outputs:     delta flags for envelope and noise floors
 *
 * Return:      none
 **************************************************************************************/
static void UnpackDeltaTimeFreq(BitStreamInfo *bsi, int numEnv, unsigned char *deltaFlagEnv, 
								int numNoiseFloors, unsigned char *deltaFlagNoise)
{
	int env, noiseFloor;

	for (env = 0; env < numEnv; env++)
		deltaFlagEnv[env] = GetBits(bsi, 1);

	for (noiseFloor = 0; noiseFloor < numNoiseFloors; noiseFloor++)
		deltaFlagNoise[noiseFloor] = GetBits(bsi, 1);
}

/**************************************************************************************
 * Function:    UnpackInverseFilterMode
 *
 * Description: unpack invf flags for chirp factor calculation (table 4.64)
 *
 * Inputs:      BitStreamInfo struct pointing to start of invf flags
 *              number of noise floor bands
 * 
 * Outputs:     invf flags for noise floor bands
 *
 * Return:      none
 **************************************************************************************/
static void UnpackInverseFilterMode(BitStreamInfo *bsi, int numNoiseFloorBands, unsigned char *mode)
{
	int n;	

	for (n = 0; n < numNoiseFloorBands; n++)
		mode[n] = GetBits(bsi, 2);
}

/**************************************************************************************
 * Function:    UnpackSinusoids
 *
 * Description: unpack sinusoid (harmonic) flags for each SBR subband (table 4.67)
 *
 * Inputs:      BitStreamInfo struct pointing to start of sinusoid flags
 *              number of high resolution SBR subbands (nHigh)
 * 
 * Outputs:     sinusoid flags for each SBR subband, zero-filled above nHigh
 *
 * Return:      none
 **************************************************************************************/
static void UnpackSinusoids(BitStreamInfo *bsi, int nHigh, int addHarmonicFlag, unsigned char *addHarmonic)
{
	int n;

	n = 0;
	if (addHarmonicFlag) {
		for (  ; n < nHigh; n++)
			addHarmonic[n] = GetBits(bsi, 1);
	}

	/* zero out unused bands */
	for (     ; n < MAX_QMF_BANDS; n++)
		addHarmonic[n] = 0;
}

/**************************************************************************************
 * Function:    CopyCouplingGrid
 *
 * Description: copy grid parameters from left to right for channel coupling
 *
 * Inputs:      initialized SBRGrid struct for left channel
 * 
 * Outputs:     initialized SBRGrid struct for right channel
 *
 * Return:      none
 **************************************************************************************/
static void CopyCouplingGrid(SBRGrid *sbrGridLeft, SBRGrid *sbrGridRight)
{
	int env, noiseFloor;

	sbrGridRight->frameClass =     sbrGridLeft->frameClass;
	sbrGridRight->ampResFrame =    sbrGridLeft->ampResFrame;
	sbrGridRight->pointer =        sbrGridLeft->pointer;

	sbrGridRight->numEnv =         sbrGridLeft->numEnv;
	for (env = 0; env < sbrGridLeft->numEnv; env++) {
		sbrGridRight->envTimeBorder[env] = sbrGridLeft->envTimeBorder[env];
		sbrGridRight->freqRes[env] =       sbrGridLeft->freqRes[env];
	}
	sbrGridRight->envTimeBorder[env] = sbrGridLeft->envTimeBorder[env];	/* borders are [0, numEnv] inclusive */

	sbrGridRight->numNoiseFloors = sbrGridLeft->numNoiseFloors;
	for (noiseFloor = 0; noiseFloor <= sbrGridLeft->numNoiseFloors; noiseFloor++)
		sbrGridRight->noiseTimeBorder[noiseFloor] = sbrGridLeft->noiseTimeBorder[noiseFloor];

	/* numEnvPrev, numNoiseFloorsPrev, freqResPrev are updated in DecodeSBREnvelope() and DecodeSBRNoise() */
}

/**************************************************************************************
 * Function:    CopyCouplingInverseFilterMode
 *
 * Description: copy invf flags from left to right for channel coupling
 *
 * Inputs:      invf flags for left channel
 *              number of noise floor bands
 * 
 * Outputs:     invf flags for right channel
 *
 * Return:      none
 **************************************************************************************/
static void CopyCouplingInverseFilterMode(int numNoiseFloorBands, unsigned char *modeLeft, unsigned char *modeRight)
{
	int band;

	for (band = 0; band < numNoiseFloorBands; band++)
		modeRight[band] = modeLeft[band];
}

/**************************************************************************************
 * Function:    UnpackSBRSingleChannel
 *
 * Description: unpack sideband info (grid, delta flags, invf flags, envelope and 
 *                noise floor configuration, sinusoids) for a single channel
 *
 * Inputs:      BitStreamInfo struct pointing to start of sideband info
 *              initialized PSInfoSBR struct (after parsing SBR header and building
 *                frequency tables)
 *              base output channel (range = [0, nChans-1])
 * 
 * Outputs:     updated PSInfoSBR struct (SBRGrid and SBRChan)
 *
 * Return:      none
 **************************************************************************************/
void UnpackSBRSingleChannel(BitStreamInfo *bsi, PSInfoSBR *psi, int chBase)
{
	int bitsLeft;
	SBRHeader *sbrHdr = &(psi->sbrHdr[chBase]);
	SBRGrid *sbrGridL = &(psi->sbrGrid[chBase+0]);
	SBRFreq *sbrFreq =  &(psi->sbrFreq[chBase]);
	SBRChan *sbrChanL = &(psi->sbrChan[chBase+0]);

	psi->dataExtra = GetBits(bsi, 1);
	if (psi->dataExtra)
		psi->resBitsData = GetBits(bsi, 4);

	UnpackSBRGrid(bsi, sbrHdr, sbrGridL);
	UnpackDeltaTimeFreq(bsi, sbrGridL->numEnv, sbrChanL->deltaFlagEnv, sbrGridL->numNoiseFloors, sbrChanL->deltaFlagNoise);
	UnpackInverseFilterMode(bsi, sbrFreq->numNoiseFloorBands, sbrChanL->invfMode[1]);

	DecodeSBREnvelope(bsi, psi, sbrGridL, sbrFreq, sbrChanL, 0);
	DecodeSBRNoise(bsi, psi, sbrGridL, sbrFreq, sbrChanL, 0);

	sbrChanL->addHarmonicFlag[1] = GetBits(bsi, 1);
	UnpackSinusoids(bsi, sbrFreq->nHigh, sbrChanL->addHarmonicFlag[1], sbrChanL->addHarmonic[1]);
	
	psi->extendedDataPresent = GetBits(bsi, 1);
	if (psi->extendedDataPresent) {
		psi->extendedDataSize = GetBits(bsi, 4);
		if (psi->extendedDataSize == 15)
			psi->extendedDataSize += GetBits(bsi, 8);

		bitsLeft = 8 * psi->extendedDataSize;

		/* get ID, unpack extension info, do whatever is necessary with it... */
		while (bitsLeft > 0) {
			GetBits(bsi, 8);
			bitsLeft -= 8;
		}
	}
}

/**************************************************************************************
 * Function:    UnpackSBRChannelPair
 *
 * Description: unpack sideband info (grid, delta flags, invf flags, envelope and 
 *                noise floor configuration, sinusoids) for a channel pair
 *
 * Inputs:      BitStreamInfo struct pointing to start of sideband info
 *              initialized PSInfoSBR struct (after parsing SBR header and building
 *                frequency tables)
 *              base output channel (range = [0, nChans-1])
 * 
 * Outputs:     updated PSInfoSBR struct (SBRGrid and SBRChan for both channels)
 *
 * Return:      none
 **************************************************************************************/
void UnpackSBRChannelPair(BitStreamInfo *bsi, PSInfoSBR *psi, int chBase)
{
	int bitsLeft;
	SBRHeader *sbrHdr = &(psi->sbrHdr[chBase]);
	SBRGrid *sbrGridL = &(psi->sbrGrid[chBase+0]), *sbrGridR = &(psi->sbrGrid[chBase+1]);
	SBRFreq *sbrFreq =  &(psi->sbrFreq[chBase]);
	SBRChan *sbrChanL = &(psi->sbrChan[chBase+0]), *sbrChanR = &(psi->sbrChan[chBase+1]);

	psi->dataExtra = GetBits(bsi, 1);
	if (psi->dataExtra) {
		psi->resBitsData = GetBits(bsi, 4);
		psi->resBitsData = GetBits(bsi, 4);
	}

	psi->couplingFlag = GetBits(bsi, 1);
	if (psi->couplingFlag) {
		UnpackSBRGrid(bsi, sbrHdr, sbrGridL);
		CopyCouplingGrid(sbrGridL, sbrGridR);

		UnpackDeltaTimeFreq(bsi, sbrGridL->numEnv, sbrChanL->deltaFlagEnv, sbrGridL->numNoiseFloors, sbrChanL->deltaFlagNoise);
		UnpackDeltaTimeFreq(bsi, sbrGridR->numEnv, sbrChanR->deltaFlagEnv, sbrGridR->numNoiseFloors, sbrChanR->deltaFlagNoise);

		UnpackInverseFilterMode(bsi, sbrFreq->numNoiseFloorBands, sbrChanL->invfMode[1]);
		CopyCouplingInverseFilterMode(sbrFreq->numNoiseFloorBands, sbrChanL->invfMode[1], sbrChanR->invfMode[1]);
		
		DecodeSBREnvelope(bsi, psi, sbrGridL, sbrFreq, sbrChanL, 0);
		DecodeSBRNoise(bsi, psi, sbrGridL, sbrFreq, sbrChanL, 0);
		DecodeSBREnvelope(bsi, psi, sbrGridR, sbrFreq, sbrChanR, 1);
		DecodeSBRNoise(bsi, psi, sbrGridR, sbrFreq, sbrChanR, 1);

		/* pass RIGHT sbrChan struct */
		UncoupleSBREnvelope(psi, sbrGridL, sbrFreq, sbrChanR);
		UncoupleSBRNoise(psi, sbrGridL, sbrFreq, sbrChanR);

	} else {
		UnpackSBRGrid(bsi, sbrHdr, sbrGridL);
		UnpackSBRGrid(bsi, sbrHdr, sbrGridR);
		UnpackDeltaTimeFreq(bsi, sbrGridL->numEnv, sbrChanL->deltaFlagEnv, sbrGridL->numNoiseFloors, sbrChanL->deltaFlagNoise);
		UnpackDeltaTimeFreq(bsi, sbrGridR->numEnv, sbrChanR->deltaFlagEnv, sbrGridR->numNoiseFloors, sbrChanR->deltaFlagNoise);
		UnpackInverseFilterMode(bsi, sbrFreq->numNoiseFloorBands, sbrChanL->invfMode[1]);
		UnpackInverseFilterMode(bsi, sbrFreq->numNoiseFloorBands, sbrChanR->invfMode[1]);

		DecodeSBREnvelope(bsi, psi, sbrGridL, sbrFreq, sbrChanL, 0);
		DecodeSBREnvelope(bsi, psi, sbrGridR, sbrFreq, sbrChanR, 1);
		DecodeSBRNoise(bsi, psi, sbrGridL, sbrFreq, sbrChanL, 0);
		DecodeSBRNoise(bsi, psi, sbrGridR, sbrFreq, sbrChanR, 1);
	}

	sbrChanL->addHarmonicFlag[1] = GetBits(bsi, 1);
	UnpackSinusoids(bsi, sbrFreq->nHigh, sbrChanL->addHarmonicFlag[1], sbrChanL->addHarmonic[1]);

	sbrChanR->addHarmonicFlag[1] = GetBits(bsi, 1);
	UnpackSinusoids(bsi, sbrFreq->nHigh, sbrChanR->addHarmonicFlag[1], sbrChanR->addHarmonic[1]);

	psi->extendedDataPresent = GetBits(bsi, 1);
	if (psi->extendedDataPresent) {
		psi->extendedDataSize = GetBits(bsi, 4);
		if (psi->extendedDataSize == 15)
			psi->extendedDataSize += GetBits(bsi, 8);

		bitsLeft = 8 * psi->extendedDataSize;

		/* get ID, unpack extension info, do whatever is necessary with it... */
		while (bitsLeft > 0) {
			GetBits(bsi, 8);
			bitsLeft -= 8;
		}
	}
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * sbr.c - top level functions for SBR
 **************************************************************************************/

//#ifdef USE_DEFAULT_STDLIB
#include <stdlib.h>
//#else
//#include "hlxclib/stdlib.h"
//#endif

//#include "sbr.h"

/**************************************************************************************
 * Function:    InitSBRState
 *
 * Description: initialize PSInfoSBR struct at start of stream or after flush
 *
 * Inputs:      valid AACDecInfo struct
 *
 * Outputs:     PSInfoSBR struct with proper initial state
 *
 * Return:      none
 **************************************************************************************/
static void InitSBRState(PSInfoSBR *psi)
{
	int i, ch;
	unsigned char *c;

	if (!psi)
		return;

	/* clear SBR state structure */
	c = (unsigned char *)psi;
	for (i = 0; i < (int)sizeof(PSInfoSBR); i++)
		*c++ = 0;

	/* initialize non-zero state variables */
	for (ch = 0; ch < AAC_MAX_NCHANS; ch++) {
		psi->sbrChan[ch].reset = 1;
		psi->sbrChan[ch].laPrev = -1;
	}
}
 
/**************************************************************************************
 * Function:    InitSBR
 *
 * Description: initialize SBR decoder
 *
 * Inputs:      valid AACDecInfo struct
 *
 * Outputs:     PSInfoSBR struct to hold SBR state information
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Note:        memory allocation for SBR is only done here
 **************************************************************************************/
int InitSBR(AACDecInfo *aacDecInfo)
{
	PSInfoSBR *psi;

	if (!aacDecInfo)
		return ERR_AAC_NULL_POINTER;

	/* allocate SBR state structure */
	psi = (PSInfoSBR *)malloc(sizeof(PSInfoSBR));
	if (!psi)
		return ERR_AAC_SBR_INIT;

	InitSBRState(psi);

	aacDecInfo->psInfoSBR = psi;
	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    FreeSBR
 *
 * Description: free SBR decoder
 *
 * Inputs:      valid AACDecInfo struct
 *
 * Outputs:     none
 *
 * Return:      none
 *
 * Note:        memory deallocation for SBR is only done here
 **************************************************************************************/
void FreeSBR(AACDecInfo *aacDecInfo)
{
	if (aacDecInfo && aacDecInfo->psInfoSBR)
		free(aacDecInfo->psInfoSBR);

	return;
}

/**************************************************************************************
 * Function:    DecodeSBRBitstream
 *
 * Description: decode sideband information for SBR
 *
 * Inputs:      valid AACDecInfo struct
 *              fill buffer with SBR extension block
 *              number of bytes in fill buffer
 *              base output channel (range = [0, nChans-1])
 *
 * Outputs:     initialized state structs (SBRHdr, SBRGrid, SBRFreq, SBRChan)
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       SBR payload should be in aacDecInfo->fillBuf
 *              returns with no error if fill buffer is not an SBR extension block, 
 *                or if current block is not a fill block (e.g. for LFE upsampling)
 **************************************************************************************/
int DecodeSBRBitstream(AACDecInfo *aacDecInfo, int chBase)
{
	int headerFlag;
	BitStreamInfo bsi;
	PSInfoSBR *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoSBR)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoSBR *)(aacDecInfo->psInfoSBR);

	if (aacDecInfo->currBlockID != AAC_ID_FIL || (aacDecInfo->fillExtType != EXT_SBR_DATA && aacDecInfo->fillExtType != EXT_SBR_DATA_CRC))
		return ERR_AAC_NONE;

	SetBitstreamPointer(&bsi, aacDecInfo->fillCount, aacDecInfo->fillBuf);
	if (GetBits(&bsi, 4) != (unsigned int)aacDecInfo->fillExtType)
		return ERR_AAC_SBR_BITSTREAM;
	
	if (aacDecInfo->fillExtType == EXT_SBR_DATA_CRC)
		psi->crcCheckWord = GetBits(&bsi, 10);

	headerFlag = GetBits(&bsi, 1);
	if (headerFlag) {
		/* get sample rate index for output sample rate (2x base rate) */
		psi->sampRateIdx = GetSampRateIdx(2 * aacDecInfo->sampRate);
		if (psi->sampRateIdx < 0 || psi->sampRateIdx >= NUM_SAMPLE_RATES)
			return ERR_AAC_SBR_BITSTREAM;
		else if (psi->sampRateIdx >= NUM_SAMPLE_RATES_SBR)
			return ERR_AAC_SBR_SINGLERATE_UNSUPPORTED;

		/* reset flag = 1 if header values changed */
		if (UnpackSBRHeader(&bsi, &(psi->sbrHdr[chBase])))
			psi->sbrChan[chBase].reset = 1;
	
		/* first valid SBR header should always trigger CalcFreqTables(), since psi->reset was set in InitSBR() */
		if (psi->sbrChan[chBase].reset)
			CalcFreqTables(&(psi->sbrHdr[chBase+0]), &(psi->sbrFreq[chBase]), psi->sampRateIdx);

		/* copy and reset state to right channel for CPE */
		if (aacDecInfo->prevBlockID == AAC_ID_CPE)
			psi->sbrChan[chBase+1].reset = psi->sbrChan[chBase+0].reset;
	}
	

	/* if no header has been received, upsample only */
	if (psi->sbrHdr[chBase].count == 0)
		return ERR_AAC_NONE;

	if (aacDecInfo->prevBlockID == AAC_ID_SCE) {
		UnpackSBRSingleChannel(&bsi, psi, chBase);
	} else if (aacDecInfo->prevBlockID == AAC_ID_CPE) {
		UnpackSBRChannelPair(&bsi, psi, chBase);
	} else {
		return ERR_AAC_SBR_BITSTREAM;
	}

	ByteAlignBitstream(&bsi);

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    DecodeSBRData
 *
 * Description: apply SBR to one frame of PCM data
 *
 * Inputs:      1024 samples of decoded 32-bit PCM, before SBR
 *              size of input PCM samples (must be 4 bytes)
 *              number of fraction bits in input PCM samples
 *              base output channel (range = [0, nChans-1])
 *              initialized state structs (SBRHdr, SBRGrid, SBRFreq, SBRChan)
 *
 * Outputs:     2048 samples of decoded 16-bit PCM, after SBR
 *
 * Return:      0 if successful, error code (< 0) if error
 **************************************************************************************/
int DecodeSBRData(AACDecInfo *aacDecInfo, int chBase, short *outbuf)
{
	int k, l, ch, chBlock, qmfaBands, qmfsBands;
	int upsampleOnly, gbIdx, gbMask;
	int *inbuf;
	short *outptr;
	PSInfoSBR *psi;
	SBRHeader *sbrHdr;
	SBRGrid *sbrGrid;
	SBRFreq *sbrFreq;
	SBRChan *sbrChan;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoSBR)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoSBR *)(aacDecInfo->psInfoSBR);
	
	/* same header and freq tables for both channels in CPE */
	sbrHdr =  &(psi->sbrHdr[chBase]);
	sbrFreq = &(psi->sbrFreq[chBase]);

	/* upsample only if we haven't received an SBR header yet or if we have an LFE block */
	if (aacDecInfo->currBlockID == AAC_ID_LFE) {
		chBlock = 1;
		upsampleOnly = 1;
	} else if (aacDecInfo->currBlockID == AAC_ID_FIL) {
		if (aacDecInfo->prevBlockID == AAC_ID_SCE) 
			chBlock = 1;
		else if (aacDecInfo->prevBlockID == AAC_ID_CPE)
			chBlock = 2;
		else
			return ERR_AAC_NONE;
		
		upsampleOnly = (sbrHdr->count == 0 ? 1 : 0);
		if (aacDecInfo->fillExtType != EXT_SBR_DATA && aacDecInfo->fillExtType != EXT_SBR_DATA_CRC)
			return ERR_AAC_NONE;
	} else {
		/* ignore non-SBR blocks */
		return ERR_AAC_NONE;
	}

	if (upsampleOnly) {
		sbrFreq->kStart = 32;
		sbrFreq->numQMFBands = 0;
	}

	for (ch = 0; ch < chBlock; ch++) {
		sbrGrid = &(psi->sbrGrid[chBase + ch]);	
		sbrChan = &(psi->sbrChan[chBase + ch]);

		if (aacDecInfo->rawSampleBuf[ch] == 0 || aacDecInfo->rawSampleBytes != 4)
			return ERR_AAC_SBR_PCM_FORMAT;
		inbuf = (int *)aacDecInfo->rawSampleBuf[ch];
		outptr = outbuf + chBase + ch;

		/* restore delay buffers (could use ring buffer or keep in temp buffer for nChans == 1) */
		for (l = 0; l < HF_GEN; l++) {
			for (k = 0; k < 64; k++) {
				psi->XBuf[l][k][0] = psi->XBufDelay[chBase + ch][l][k][0];
				psi->XBuf[l][k][1] = psi->XBufDelay[chBase + ch][l][k][1];
			}
		}

		/* step 1 - analysis QMF */
		qmfaBands = sbrFreq->kStart;
		for (l = 0; l < 32; l++) {
			gbMask = QMFAnalysis(inbuf + l*32, psi->delayQMFA[chBase + ch], psi->XBuf[l + HF_GEN][0], 
				aacDecInfo->rawSampleFBits, &(psi->delayIdxQMFA[chBase + ch]), qmfaBands);

			gbIdx = ((l + HF_GEN) >> 5) & 0x01;	
			sbrChan->gbMask[gbIdx] |= gbMask;	/* gbIdx = (0 if i < 32), (1 if i >= 32) */
		}

		if (upsampleOnly) {
			/* no SBR - just run synthesis QMF to upsample by 2x */
			qmfsBands = 32;
			for (l = 0; l < 32; l++) {
				/* step 4 - synthesis QMF */
				QMFSynthesis(psi->XBuf[l + HF_ADJ][0], psi->delayQMFS[chBase + ch], &(psi->delayIdxQMFS[chBase + ch]), qmfsBands, outptr, aacDecInfo->nChans);
				outptr += 64*aacDecInfo->nChans;
			}
		} else {
			/* if previous frame had lower SBR starting freq than current, zero out the synthesized QMF
			 *   bands so they aren't used as sources for patching
			 * after patch generation, restore from delay buffer
			 * can only happen after header reset
			 */
			for (k = sbrFreq->kStartPrev; k < sbrFreq->kStart; k++) {
				for (l = 0; l < sbrGrid->envTimeBorder[0] + HF_ADJ; l++) {
					psi->XBuf[l][k][0] = 0;
					psi->XBuf[l][k][1] = 0;
				}
			}

			/* step 2 - HF generation */
			GenerateHighFreq(psi, sbrGrid, sbrFreq, sbrChan, ch);

			/* restore SBR bands that were cleared before patch generation (time slots 0, 1 no longer needed) */
			for (k = sbrFreq->kStartPrev; k < sbrFreq->kStart; k++) {
				for (l = HF_ADJ; l < sbrGrid->envTimeBorder[0] + HF_ADJ; l++) {
					psi->XBuf[l][k][0] = psi->XBufDelay[chBase + ch][l][k][0];
					psi->XBuf[l][k][1] = psi->XBufDelay[chBase + ch][l][k][1];
				}
			}

			/* step 3 - HF adjustment */
			AdjustHighFreq(psi, sbrHdr, sbrGrid, sbrFreq, sbrChan, ch);

			/* step 4 - synthesis QMF */
			qmfsBands = sbrFreq->kStartPrev + sbrFreq->numQMFBandsPrev;
			for (l = 0; l < sbrGrid->envTimeBorder[0]; l++) {
				/* if new envelope starts mid-frame, use old settings until start of first envelope in this frame */
				QMFSynthesis(psi->XBuf[l + HF_ADJ][0], psi->delayQMFS[chBase + ch], &(psi->delayIdxQMFS[chBase + ch]), qmfsBands, outptr, aacDecInfo->nChans);
				outptr += 64*aacDecInfo->nChans;
			}

			qmfsBands = sbrFreq->kStart + sbrFreq->numQMFBands;
			for (     ; l < 32; l++) {
				/* use new settings for rest of frame (usually the entire frame, unless the first envelope starts mid-frame) */
				QMFSynthesis(psi->XBuf[l + HF_ADJ][0], psi->delayQMFS[chBase + ch], &(psi->delayIdxQMFS[chBase + ch]), qmfsBands, outptr, aacDecInfo->nChans);
				outptr += 64*aacDecInfo->nChans;
			}
		}

		/* save delay */
		for (l = 0; l < HF_GEN; l++) {
			for (k = 0; k < 64; k++) {		
				psi->XBufDelay[chBase + ch][l][k][0] = psi->XBuf[l+32][k][0];
				psi->XBufDelay[chBase + ch][l][k][1] = psi->XBuf[l+32][k][1];
			}
		}
		sbrChan->gbMask[0] = sbrChan->gbMask[1];
		sbrChan->gbMask[1] = 0;

		if (sbrHdr->count > 0)
			sbrChan->reset = 0;
	}
	sbrFreq->kStartPrev = sbrFreq->kStart;
	sbrFreq->numQMFBandsPrev = sbrFreq->numQMFBands;

	if (aacDecInfo->nChans > 0 && (chBase + ch) == aacDecInfo->nChans)
		psi->frameCount++;

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    FlushCodecSBR
 *
 * Description: flush internal SBR codec state (after seeking, for example)
 *
 * Inputs:      valid AACDecInfo struct
 *
 * Outputs:     updated state variables for SBR
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       SBR is heavily dependent on state from previous frames
 *                (e.g. delta coded scalefactors, previous envelope boundaries, etc.)
 *              On flush, we reset everything as if SBR had just been initialized
 *                for the first time. This triggers "upsample-only" mode until
 *                the first valid SBR header is received. Then SBR starts as usual.
 **************************************************************************************/
int FlushCodecSBR(AACDecInfo *aacDecInfo)
{
	PSInfoSBR *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoSBR)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoSBR *)(aacDecInfo->psInfoSBR);

	InitSBRState(psi);

	return 0;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * stproc.c - mid-side and intensity stereo processing
 **************************************************************************************/

//#include "coder.h"
////#include "assembly.h"

/* pow14[0][i] = -pow(2, i/4.0) 
 * pow14[1][i] = +pow(2, i/4.0) 
 * 
 * i = [0,1,2,3]
 * format = Q30
 */


/**************************************************************************************
 * Function:    StereoProcessGroup
 *
 * Description: apply mid-side and intensity stereo to group of transform coefficients
 *
 * Inputs:      dequantized transform coefficients for both channels
 *              pointer to appropriate scalefactor band table
 *              mid-side mask enabled flag
 *              buffer with mid-side mask (one bit for each scalefactor band)
 *              bit offset into mid-side mask buffer
 *              max coded scalefactor band
 *              buffer of codebook indices for right channel
 *              buffer of scalefactors for right channel, range = [0, 256]
 *
 * Outputs:     updated transform coefficients in Q(FBITS_OUT_DQ_OFF)
 *              updated minimum guard bit count for both channels
 *
 * Return:      none
 *
 * Notes:       assume no guard bits in input
 *              gains 0 int bits
 **************************************************************************************/
static void StereoProcessGroup(int *coefL, int *coefR, const short *sfbTab, 
							  int msMaskPres, unsigned char *msMaskPtr, int msMaskOffset, int maxSFB, 
							  unsigned char *cbRight, short *sfRight, int *gbCurrent)
{
//fb
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wnarrowing"
static const int pow14[2][4] = { 
	{ 0xc0000000, 0xb3e407d7, 0xa57d8666, 0x945d819b }, 
	{ 0x40000000, 0x4c1bf829, 0x5a82799a, 0x6ba27e65 }
};
#pragma GCC diagnostic pop

	int sfb, width, cbIdx, sf, cl, cr, scalef, scalei;
	int gbMaskL, gbMaskR;
	unsigned char msMask;

	msMask = (*msMaskPtr++) >> msMaskOffset;
	gbMaskL = 0;
	gbMaskR = 0;

	for (sfb = 0; sfb < maxSFB; sfb++) {
		width = sfbTab[sfb+1] - sfbTab[sfb];	/* assume >= 0 (see sfBandTabLong/sfBandTabShort) */
		cbIdx = cbRight[sfb];

		if (cbIdx == 14 || cbIdx == 15) {
			/* intensity stereo */
			if (msMaskPres == 1 && (msMask & 0x01))
				cbIdx ^= 0x01;				/* invert_intensity(): 14 becomes 15, or 15 becomes 14 */
			sf = -sfRight[sfb];				/* negative since we use identity 0.5^(x) = 2^(-x) (see spec) */
			cbIdx &= 0x01;					/* choose - or + scale factor */
			scalef = pow14[cbIdx][sf & 0x03];
			scalei = (sf >> 2) + 2;			/* +2 to compensate for scalef = Q30 */
			
			if (scalei > 0) {
				if (scalei > 30)
					scalei = 30;
				do {
					cr = MULSHIFT32(*coefL++, scalef);
					CLIP_2N(cr, 31-scalei);
					cr <<= scalei;
					gbMaskR |= FASTABS(cr);
					*coefR++ = cr;
				} while (--width);
			} else {
				scalei = -scalei;
				if (scalei > 31)
					scalei = 31;
				do {
					cr = MULSHIFT32(*coefL++, scalef) >> scalei;
					gbMaskR |= FASTABS(cr);
					*coefR++ = cr;
				} while (--width);
			}
		} else if ( cbIdx != 13 && ((msMaskPres == 1 && (msMask & 0x01)) || msMaskPres == 2) ) {
			/* mid-side stereo (assumes no GB in inputs) */
			do {
				cl = *coefL;	
				cr = *coefR;

				if ( (FASTABS(cl) | FASTABS(cr)) >> 30 ) {
					/* avoid overflow (rare) */
					cl >>= 1;
					sf = cl + (cr >> 1);	CLIP_2N(sf, 30); 	sf <<= 1;
					cl = cl - (cr >> 1);	CLIP_2N(cl, 30); 	cl <<= 1;
				} else {
					/* usual case */
					sf = cl + cr;
					cl -= cr;
				}

				*coefL++ = sf;
				gbMaskL |= FASTABS(sf);
				*coefR++ = cl;
				gbMaskR |= FASTABS(cl);
			} while (--width);

		} else {
			/* nothing to do */
			coefL += width;
			coefR += width;
		}

		/* get next mask bit (should be branchless on ARM) */
		msMask >>= 1;
		if (++msMaskOffset == 8) {
			msMask = *msMaskPtr++;
			msMaskOffset = 0;
		}
	}

	cl = CLZ(gbMaskL) - 1;
	if (gbCurrent[0] > cl)
		gbCurrent[0] = cl;

	cr = CLZ(gbMaskR) - 1;
	if (gbCurrent[1] > cr)
		gbCurrent[1] = cr;

	return;
}

/**************************************************************************************
 * Function:    StereoProcess
 *
 * Description: apply mid-side and intensity stereo, if enabled
 *
 * Inputs:      valid AACDecInfo struct (including dequantized transform coefficients)
 *
 * Outputs:     updated transform coefficients in Q(FBITS_OUT_DQ_OFF)
 *              updated minimum guard bit count for both channels
 *
 * Return:      0 if successful, -1 if error
 **************************************************************************************/
int StereoProcess(AACDecInfo *aacDecInfo)
{
	PSInfoBase *psi;
	ICSInfo *icsInfo;
	int gp, win, nSamps, msMaskOffset;
	int *coefL, *coefR;
	unsigned char *msMaskPtr;
	const short *sfbTab;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return -1;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	/* mid-side and intensity stereo require common_window == 1 (see MPEG4 spec, Correction 2, 2004) */
	if (psi->commonWin != 1 || aacDecInfo->currBlockID != AAC_ID_CPE)
		return 0;

	/* nothing to do */
	if (!psi->msMaskPresent && !psi->intensityUsed[1])
		return 0;

	icsInfo = &(psi->icsInfo[0]);
	if (icsInfo->winSequence == 2) {
		sfbTab = sfBandTabShort + sfBandTabShortOffset[psi->sampRateIdx];
		nSamps = NSAMPS_SHORT;
	} else {
		sfbTab = sfBandTabLong + sfBandTabLongOffset[psi->sampRateIdx];
		nSamps = NSAMPS_LONG;
	}
	coefL = psi->coef[0];
	coefR = psi->coef[1];

	/* do fused mid-side/intensity processing for each block (one long or eight short) */
	msMaskOffset = 0;
	msMaskPtr = psi->msMaskBits;
	for (gp = 0; gp < icsInfo->numWinGroup; gp++) {
		for (win = 0; win < icsInfo->winGroupLen[gp]; win++) {
			StereoProcessGroup(coefL, coefR, sfbTab, psi->msMaskPresent, 
				msMaskPtr, msMaskOffset, icsInfo->maxSFB, psi->sfbCodeBook[1] + gp*icsInfo->maxSFB, 
				psi->scaleFactors[1] + gp*icsInfo->maxSFB, psi->gbCurrent);
			coefL += nSamps;
			coefR += nSamps;
		}
		/* we use one bit per sfb, so there are maxSFB bits for each window group */ 
		msMaskPtr += (msMaskOffset + icsInfo->maxSFB) >> 3;
		msMaskOffset = (msMaskOffset + icsInfo->maxSFB) & 0x07;
	}

	ASSERT(coefL == psi->coef[0] + 1024);
	ASSERT(coefR == psi->coef[1] + 1024);

	return 0;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com)
 * February 2005
 *
 * filefmt.c - ADIF and ADTS header decoding, raw block handling
 **************************************************************************************/

//#include "coder.h"

 /**************************************************************************************
 * Function:    UnpackADTSHeader
 *
 * Description: parse the ADTS frame header and initialize decoder state
 *
 * Inputs:      valid AACDecInfo struct
 *              double pointer to buffer with complete ADTS frame header (byte aligned)
 *                header size = 7 bytes, plus 2 if CRC
 *
 * Outputs:     filled in ADTS struct
 *              updated buffer pointer
 *              updated bit offset
 *              updated number of available bits
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * TODO:        test CRC
 *              verify that fixed fields don't change between frames
 **************************************************************************************/
int UnpackADTSHeader(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail)
{
	int bitsUsed;
	PSInfoBase *psi;
	BitStreamInfo bsi;
	ADTSHeader *fhADTS;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	fhADTS = &(psi->fhADTS);

	/* init bitstream reader */
	SetBitstreamPointer(&bsi, (*bitsAvail + 7) >> 3, *buf);
	GetBits(&bsi, *bitOffset);

	/* verify that first 12 bits of header are syncword */
	if (GetBits(&bsi, 12) != 0x0fff)
		return ERR_AAC_INVALID_ADTS_HEADER;

	/* fixed fields - should not change from frame to frame */ 
	fhADTS->id =               GetBits(&bsi, 1);
	fhADTS->layer =            GetBits(&bsi, 2);
	fhADTS->protectBit =       GetBits(&bsi, 1);
	fhADTS->profile =          GetBits(&bsi, 2);
	fhADTS->sampRateIdx =      GetBits(&bsi, 4);
	fhADTS->privateBit =       GetBits(&bsi, 1);
	fhADTS->channelConfig =    GetBits(&bsi, 3);
	fhADTS->origCopy =         GetBits(&bsi, 1);
	fhADTS->home =             GetBits(&bsi, 1);

	/* variable fields - can change from frame to frame */ 
	fhADTS->copyBit =          GetBits(&bsi, 1);
	fhADTS->copyStart =        GetBits(&bsi, 1);
	fhADTS->frameLength =      GetBits(&bsi, 13);
	fhADTS->bufferFull =       GetBits(&bsi, 11);
	fhADTS->numRawDataBlocks = GetBits(&bsi, 2) + 1;

	/* note - MPEG4 spec, correction 1 changes how CRC is handled when protectBit == 0 and numRawDataBlocks > 1 */
	if (fhADTS->protectBit == 0)
		fhADTS->crcCheckWord = GetBits(&bsi, 16);

	/* byte align */
	ByteAlignBitstream(&bsi);	/* should always be aligned anyway */

	/* check validity of header */
	if (fhADTS->layer != 0 || fhADTS->profile != AAC_PROFILE_LC ||
		fhADTS->sampRateIdx >= NUM_SAMPLE_RATES || fhADTS->channelConfig >= NUM_DEF_CHAN_MAPS)
		return ERR_AAC_INVALID_ADTS_HEADER;

#ifndef AAC_ENABLE_MPEG4
	if (fhADTS->id != 1)
		return ERR_AAC_MPEG4_UNSUPPORTED;
#endif

	/* update codec info */
	psi->sampRateIdx = fhADTS->sampRateIdx;
	if (!psi->useImpChanMap)
		psi->nChans = channelMapTab[fhADTS->channelConfig];

	/* syntactic element fields will be read from bitstream for each element */
	aacDecInfo->prevBlockID = AAC_ID_INVALID;
	aacDecInfo->currBlockID = AAC_ID_INVALID;
	aacDecInfo->currInstTag = -1;

	/* fill in user-accessible data (TODO - calc bitrate, handle tricky channel config cases) */
	aacDecInfo->bitRate = 0;
	aacDecInfo->nChans = psi->nChans;
	aacDecInfo->sampRate = sampRateTab[psi->sampRateIdx];
	aacDecInfo->profile = fhADTS->profile;
	aacDecInfo->sbrEnabled = 0;
	aacDecInfo->adtsBlocksLeft = fhADTS->numRawDataBlocks;

	/* update bitstream reader */
	bitsUsed = CalcBitsUsed(&bsi, *buf, *bitOffset);
	*buf += (bitsUsed + *bitOffset) >> 3;
	*bitOffset = (bitsUsed + *bitOffset) & 0x07;
	*bitsAvail -= bitsUsed ;
	if (*bitsAvail < 0)
		return ERR_AAC_INDATA_UNDERFLOW;

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    GetADTSChannelMapping
 *
 * Description: determine the number of channels from implicit mapping rules
 *
 * Inputs:      valid AACDecInfo struct
 *              pointer to start of raw_data_block
 *              bit offset
 *              bits available 
 *
 * Outputs:     updated number of channels
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       calculates total number of channels using rules in 14496-3, 4.5.1.2.1
 *              does not attempt to deduce speaker geometry
 **************************************************************************************/
int GetADTSChannelMapping(AACDecInfo *aacDecInfo, unsigned char *buf, int bitOffset, int bitsAvail)
{
	int ch, nChans, elementChans, err;
	PSInfoBase *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	nChans = 0;
	do {
		/* parse next syntactic element */
		err = DecodeNextElement(aacDecInfo, &buf, &bitOffset, &bitsAvail);
		if (err)
			return err;

		elementChans = elementNumChans[aacDecInfo->currBlockID];
		nChans += elementChans;

		for (ch = 0; ch < elementChans; ch++) {
			err = DecodeNoiselessData(aacDecInfo, &buf, &bitOffset, &bitsAvail, ch);
			if (err)
				return err;
		}
	} while (aacDecInfo->currBlockID != AAC_ID_END);

	if (nChans <= 0)
		return ERR_AAC_CHANNEL_MAP;

	/* update number of channels in codec state and user-accessible info structs */ 
	psi->nChans = nChans;
	aacDecInfo->nChans = psi->nChans;
	psi->useImpChanMap = 1;

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    GetNumChannelsADIF
 *
 * Description: get number of channels from program config elements in an ADIF file
 *
 * Inputs:      array of filled-in program config element structures
 *              number of PCE's
 *
 * Outputs:     none
 *
 * Return:      total number of channels in file
 *              -1 if error (invalid number of PCE's or unsupported mode)
 **************************************************************************************/
static int GetNumChannelsADIF(ProgConfigElement *fhPCE, int nPCE)
{
	int i, j, nChans;

	if (nPCE < 1 || nPCE > MAX_NUM_PCE_ADIF)
		return -1;

	nChans = 0;
	for (i = 0; i < nPCE; i++) {
		/* for now: only support LC, no channel coupling */
		if (fhPCE[i].profile != AAC_PROFILE_LC || fhPCE[i].numCCE > 0)
			return -1;

		/* add up number of channels in all channel elements (assume all single-channel) */
        nChans += fhPCE[i].numFCE;
        nChans += fhPCE[i].numSCE;
        nChans += fhPCE[i].numBCE;
        nChans += fhPCE[i].numLCE;

		/* add one more for every element which is a channel pair */
        for (j = 0; j < fhPCE[i].numFCE; j++) {
            if (CHAN_ELEM_IS_CPE(fhPCE[i].fce[j]))
                nChans++;
        }
        for (j = 0; j < fhPCE[i].numSCE; j++) {
            if (CHAN_ELEM_IS_CPE(fhPCE[i].sce[j]))
                nChans++;
        }
        for (j = 0; j < fhPCE[i].numBCE; j++) {
            if (CHAN_ELEM_IS_CPE(fhPCE[i].bce[j]))
                nChans++;
        }

	}

	return nChans;
}

/**************************************************************************************
 * Function:    GetSampleRateIdxADIF
 *
 * Description: get sampling rate index from program config elements in an ADIF file
 *
 * Inputs:      array of filled-in program config element structures
 *              number of PCE's
 *
 * Outputs:     none
 *
 * Return:      sample rate of file
 *              -1 if error (invalid number of PCE's or sample rate mismatch)
 **************************************************************************************/
static int GetSampleRateIdxADIF(ProgConfigElement *fhPCE, int nPCE)
{
	int i, idx;

	if (nPCE < 1 || nPCE > MAX_NUM_PCE_ADIF)
		return -1;

	/* make sure all PCE's have the same sample rate */
	idx = fhPCE[0].sampRateIdx;
	for (i = 1; i < nPCE; i++) {
		if (fhPCE[i].sampRateIdx != idx)
			return -1;
	}

	return idx;
}

/**************************************************************************************
 * Function:    UnpackADIFHeader
 *
 * Description: parse the ADIF file header and initialize decoder state
 *
 * Inputs:      valid AACDecInfo struct
 *              double pointer to buffer with complete ADIF header 
 *                (starting at 'A' in 'ADIF' tag)
 *              pointer to bit offset
 *              pointer to number of valid bits remaining in inbuf
 *
 * Outputs:     filled-in ADIF struct
 *              updated buffer pointer
 *              updated bit offset
 *              updated number of available bits
 *
 * Return:      0 if successful, error code (< 0) if error
 **************************************************************************************/
int UnpackADIFHeader(AACDecInfo *aacDecInfo, unsigned char **buf, int *bitOffset, int *bitsAvail)
{
	int i, bitsUsed;
	PSInfoBase *psi;
	BitStreamInfo bsi;
	ADIFHeader *fhADIF;
	ProgConfigElement *pce;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	/* init bitstream reader */
	SetBitstreamPointer(&bsi, (*bitsAvail + 7) >> 3, *buf);
	GetBits(&bsi, *bitOffset);

	/* unpack ADIF file header */
	fhADIF = &(psi->fhADIF);
	pce = psi->pce;

	/* verify that first 32 bits of header are "ADIF" */
	if (GetBits(&bsi, 8) != 'A' || GetBits(&bsi, 8) != 'D' || GetBits(&bsi, 8) != 'I' || GetBits(&bsi, 8) != 'F')
		return ERR_AAC_INVALID_ADIF_HEADER;

	/* read ADIF header fields */
	fhADIF->copyBit = GetBits(&bsi, 1);
	if (fhADIF->copyBit) {
		for (i = 0; i < ADIF_COPYID_SIZE; i++)
			fhADIF->copyID[i] = GetBits(&bsi, 8);
	}
	fhADIF->origCopy = GetBits(&bsi, 1);
	fhADIF->home =     GetBits(&bsi, 1);
	fhADIF->bsType =   GetBits(&bsi, 1);
	fhADIF->bitRate =  GetBits(&bsi, 23);
	fhADIF->numPCE =   GetBits(&bsi, 4) + 1;	/* add 1 (so range = [1, 16]) */
	if (fhADIF->bsType == 0)
		fhADIF->bufferFull = GetBits(&bsi, 20);

	/* parse all program config elements */
	for (i = 0; i < fhADIF->numPCE; i++)
		DecodeProgramConfigElement(pce + i, &bsi);

	/* byte align */
	ByteAlignBitstream(&bsi);

	/* update codec info */
	psi->nChans = GetNumChannelsADIF(pce, fhADIF->numPCE);
	psi->sampRateIdx = GetSampleRateIdxADIF(pce, fhADIF->numPCE);

	/* check validity of header */
	if (psi->nChans < 0 || psi->sampRateIdx < 0 || psi->sampRateIdx >= NUM_SAMPLE_RATES)
		return ERR_AAC_INVALID_ADIF_HEADER;
								
	/* syntactic element fields will be read from bitstream for each element */
	aacDecInfo->prevBlockID = AAC_ID_INVALID;
	aacDecInfo->currBlockID = AAC_ID_INVALID;
	aacDecInfo->currInstTag = -1;

	/* fill in user-accessible data */
	aacDecInfo->bitRate = 0;
	aacDecInfo->nChans = psi->nChans;
	aacDecInfo->sampRate = sampRateTab[psi->sampRateIdx];
	aacDecInfo->profile = pce[0].profile;
	aacDecInfo->sbrEnabled = 0;

	/* update bitstream reader */
	bitsUsed = CalcBitsUsed(&bsi, *buf, *bitOffset);
	*buf += (bitsUsed + *bitOffset) >> 3;
	*bitOffset = (bitsUsed + *bitOffset) & 0x07;
	*bitsAvail -= bitsUsed ;
	if (*bitsAvail < 0)
		return ERR_AAC_INDATA_UNDERFLOW;

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    SetRawBlockParams
 *
 * Description: set internal state variables for decoding a stream of raw data blocks
 *
 * Inputs:      valid AACDecInfo struct
 *              flag indicating source of parameters (from previous headers or passed 
 *                explicitly by caller)
 *              number of channels
 *              sample rate
 *              profile ID
 *
 * Outputs:     updated state variables in aacDecInfo
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       if copyLast == 1, then psi->nChans, psi->sampRateIdx, and 
 *                aacDecInfo->profile are not changed (it's assumed that we already 
 *                set them, such as by a previous call to UnpackADTSHeader())
 *              if copyLast == 0, then the parameters we passed in are used instead
 **************************************************************************************/
int SetRawBlockParams(AACDecInfo *aacDecInfo, int copyLast, int nChans, int sampRate, int profile)
{
	int idx;
	PSInfoBase *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	if (!copyLast) {
		aacDecInfo->profile = profile;
		psi->nChans = nChans;
		for (idx = 0; idx < NUM_SAMPLE_RATES; idx++) {
			if (sampRate == sampRateTab[idx]) {
				psi->sampRateIdx = idx;
				break;
			}
		}
		if (idx == NUM_SAMPLE_RATES)
			return ERR_AAC_INVALID_FRAME;
	}
	aacDecInfo->nChans = psi->nChans;
	aacDecInfo->sampRate = sampRateTab[psi->sampRateIdx];

	/* check validity of header */
	if (psi->sampRateIdx >= NUM_SAMPLE_RATES || psi->sampRateIdx < 0 || aacDecInfo->profile != AAC_PROFILE_LC)
		return ERR_AAC_RAWBLOCK_PARAMS;

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    PrepareRawBlock
 *
 * Description: reset per-block state variables for raw blocks (no ADTS/ADIF headers)
 *
 * Inputs:      valid AACDecInfo struct
 *
 * Outputs:     updated state variables in aacDecInfo
 *
 * Return:      0 if successful, error code (< 0) if error
 **************************************************************************************/
int PrepareRawBlock(AACDecInfo *aacDecInfo)
{
//	PSInfoBase *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
//	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);

	/* syntactic element fields will be read from bitstream for each element */
	aacDecInfo->prevBlockID = AAC_ID_INVALID;
	aacDecInfo->currBlockID = AAC_ID_INVALID;
	aacDecInfo->currInstTag = -1;

	/* fill in user-accessible data */
	aacDecInfo->bitRate = 0;
	aacDecInfo->sbrEnabled = 0;

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    FlushCodec
 *
 * Description: flush internal codec state (after seeking, for example)
 *
 * Inputs:      valid AACDecInfo struct
 *
 * Outputs:     updated state variables in aacDecInfo
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       only need to clear data which is persistent between frames 
 *                (such as overlap buffer)
 **************************************************************************************/
int FlushCodec(AACDecInfo *aacDecInfo)
{
	PSInfoBase *psi;

	/* validate pointers */
	if (!aacDecInfo || !aacDecInfo->psInfoBase)
		return ERR_AAC_NULL_POINTER;
	psi = (PSInfoBase *)(aacDecInfo->psInfoBase);
	
	ClearBuffer(psi->overlap, AAC_MAX_NCHANS * AAC_MAX_NSAMPS * sizeof(int));
	ClearBuffer(psi->prevWinShape, AAC_MAX_NCHANS * sizeof(int));

	return ERR_AAC_NONE;
}



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * February 2005
 *
 * aactabs.c - platform-independent tables for AAC decoder (global, read-only)
 **************************************************************************************/

//#include "aaccommon.h"

/* sample rates (table 4.5.1) */
const int sampRateTab[NUM_SAMPLE_RATES] = {
    96000, 88200, 64000, 48000, 44100, 32000, 
	24000, 22050, 16000, 12000, 11025,  8000
};

/* max scalefactor band for prediction (main profile only) */
const int predSFBMax[NUM_SAMPLE_RATES] = {
	33, 33, 38, 40, 40, 40, 41, 41, 37, 37, 37, 34
};

/* channel mapping (table 1.6.3.4) (-1 = unknown, so need to determine mapping based on rules in 8.5.1) */
const int channelMapTab[NUM_DEF_CHAN_MAPS] = {
	-1, 1, 2, 3, 4, 5, 6, 8
};

/* number of channels in each element (SCE, CPE, etc.)
 * see AACElementID in aaccommon.h 
 */
const int elementNumChans[NUM_ELEMENTS] = {
	1, 2, 0, 1, 0, 0, 0, 0
};

/* total number of scale factor bands in one window */
const unsigned char sfBandTotalShort[NUM_SAMPLE_RATES] = {
    12, 12, 12, 14, 14, 14, 15, 15, 15, 15, 15, 15
};

const unsigned char sfBandTotalLong[NUM_SAMPLE_RATES] = {
    41, 41, 47, 49, 49, 51, 47, 47, 43, 43, 43, 40
};

/* scale factor band tables */
const int sfBandTabShortOffset[NUM_SAMPLE_RATES] = {0, 0, 0, 13, 13, 13, 28, 28, 44, 44, 44, 60};

const short sfBandTabShort[76] = {
	/* short block 64, 88, 96 kHz [13] (tables 4.5.24, 4.5.26) */
	0,   4,   8,  12,  16,  20,  24,  32,  40,  48,  64,  92, 128,

	/* short block 32, 44, 48 kHz [15] (table 4.5.15) */
	0,   4,   8,  12,  16,  20,  28,  36,  44,  56,  68,  80,  96, 112, 128,

	/* short block 22, 24 kHz [16] (table 4.5.22) */
	0,   4,   8,  12,  16,  20,  24,  28,  36,  44,  52,  64,  76,  92, 108, 128,

	/* short block 11, 12, 16 kHz [16] (table 4.5.20) */
	0,   4,   8,  12,  16,  20,  24,  28,  32,  40,  48,  60,  72,  88, 108, 128,

	/* short block 8 kHz [16] (table 4.5.18) */
	0,   4,   8,  12,  16,  20,  24,  28,  36,  44,  52,  60,  72,  88, 108, 128
};

const int sfBandTabLongOffset[NUM_SAMPLE_RATES] = {0, 0, 42, 90, 90, 140, 192, 192, 240, 240, 240, 284};

const short sfBandTabLong[325] = {
	/* long block 88, 96 kHz [42] (table 4.5.25) */
	  0,   4,   8,  12,  16,  20,  24,  28,  32,  36,  40,  44,  48,   52,
	 56,  64,  72,  80,  88,  96, 108, 120, 132, 144, 156, 172, 188,  212,
	240, 276, 320, 384, 448, 512, 576, 640, 704, 768, 832, 896, 960, 1024,

	/* long block 64 kHz [48] (table 4.5.13) */
	  0,   4,   8,  12,  16,  20,  24,  28,  32,  36,  40,  44,  48,  52,  56,   64,
	 72,  80,  88, 100, 112, 124, 140, 156, 172, 192, 216, 240, 268, 304, 344,  384,
	424, 464, 504, 544, 584, 624, 664, 704, 744, 784, 824, 864, 904, 944, 984, 1024,

	/* long block 44, 48 kHz [50] (table 4.5.14) */
	  0,   4,   8,  12,  16,  20,  24,  28,  32,  36,  40,  48,  56,  64,  72,   80,  88,
	 96, 108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384,  416, 448,
	480, 512, 544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 1024,

	/* long block 32 kHz [52] (table 4.5.16) */
	  0,   4,   8,  12,  16,  20,  24,  28,  32,  36,  40,  48,  56,  64,  72,   80,  88,  96,
	108, 120, 132, 144, 160, 176, 196, 216, 240, 264, 292, 320, 352, 384, 416,  448, 480, 512,
	544, 576, 608, 640, 672, 704, 736, 768, 800, 832, 864, 896, 928, 960, 992, 1024,

	/* long block 22, 24 kHz [48] (table 4.5.21) */
	  0,   4,   8,  12,  16,  20,  24,  28,  32,  36,  40,  44,  52,  60,  68,   76,
	 84,  92, 100, 108, 116, 124, 136, 148, 160, 172, 188, 204, 220, 240, 260,  284,
	308, 336, 364, 396, 432, 468, 508, 552, 600, 652, 704, 768, 832, 896, 960, 1024,

	/* long block 11, 12, 16 kHz [44] (table 4.5.19) */
	  0,   8,  16,  24,  32,  40,  48,  56,  64,  72,  80,  88, 100,  112, 124,
	136, 148, 160, 172, 184, 196, 212, 228, 244, 260, 280, 300, 320,  344, 368,
	396, 424, 456, 492, 532, 572, 616, 664, 716, 772, 832, 896, 960, 1024,

	/* long block 8 kHz [41] (table 4.5.17) */
	  0,  12,  24,  36,  48,  60,  72,  84,  96, 108, 120, 132,  144, 156,
	172, 188, 204, 220, 236, 252, 268, 288, 308, 328, 348, 372,  396, 420,
	448, 476, 508, 544, 580, 620, 664, 712, 764, 820, 880, 944, 1024
};


/* TNS max bands (table 4.139) and max order (table 4.138) */
const int tnsMaxBandsShortOffset[AAC_NUM_PROFILES] = {0, 0, 12};

const unsigned char tnsMaxBandsShort[2*NUM_SAMPLE_RATES] = {
	 9,  9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14,		/* short block, Main/LC */
	 7,  7,  7,  6,  6,  6,  7,  7,  8,  8,  8,  7		/* short block, SSR */
};

const unsigned char tnsMaxOrderShort[AAC_NUM_PROFILES] = {7, 7, 7};

const int tnsMaxBandsLongOffset[AAC_NUM_PROFILES] = {0, 0, 12};

const unsigned char tnsMaxBandsLong[2*NUM_SAMPLE_RATES] = {
	31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39,		/* long block, Main/LC */
	28, 28, 27, 26, 26, 26, 29, 29, 23, 23, 23, 19,		/* long block, SSR */
};

const unsigned char tnsMaxOrderLong[AAC_NUM_PROFILES] = {20, 12, 12};



/**************************************************************************************
 * Fixed-point HE-AAC decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * February 2005
 *
 * aacdec.c - platform-independent top level decoder API
 **************************************************************************************/

//#include "aaccommon.h"

////#include "profile.h"

#define PROFILE_START(x)
#define PROFILE_END()

/**************************************************************************************
 * Function:    AACInitDecoder
 *
 * Description: allocate memory for platform-specific data
 *              clear all the user-accessible fields
 *              initialize SBR decoder if enabled
 *
 * Inputs:      none
 *
 * Outputs:     none
 *
 * Return:      handle to AAC decoder instance, 0 if malloc fails
 **************************************************************************************/
HAACDecoder AACInitDecoder(void)
{
	AACDecInfo *aacDecInfo;

	aacDecInfo = AllocateBuffers();
	if (!aacDecInfo)
		return 0;

#ifdef AAC_ENABLE_SBR
	if (InitSBR(aacDecInfo)) {
		AACFreeDecoder(aacDecInfo);
		return 0;
	}
#endif

	return (HAACDecoder)aacDecInfo;
}

/**************************************************************************************
 * Function:    AACFreeDecoder
 *
 * Description: free platform-specific data allocated by AACInitDecoder
 *              free SBR decoder if enabled
 *
 * Inputs:      valid AAC decoder instance pointer (HAACDecoder)
 *
 * Outputs:     none
 *
 * Return:      none
 **************************************************************************************/
void AACFreeDecoder(HAACDecoder hAACDecoder)
{
	AACDecInfo *aacDecInfo = (AACDecInfo *)hAACDecoder;

	if (!aacDecInfo)
		return;

#ifdef AAC_ENABLE_SBR
	FreeSBR(aacDecInfo);
#endif
	FreeBuffers(aacDecInfo);
}

/**************************************************************************************
 * Function:    AACFindSyncWord
 *
 * Description: locate the next byte-alinged sync word in the raw AAC stream
 *
 * Inputs:      buffer to search for sync word
 *              max number of bytes to search in buffer
 *
 * Outputs:     none
 *
 * Return:      offset to first sync word (bytes from start of buf)
 *              -1 if sync not found after searching nBytes
 **************************************************************************************/
int AACFindSyncWord(unsigned char *buf, int nBytes)
{
	int i;

	/* find byte-aligned syncword (12 bits = 0xFFF) */
	for (i = 0; i < nBytes - 1; i++) {
		if ( (buf[i+0] & SYNCWORDH) == SYNCWORDH && (buf[i+1] & SYNCWORDL) == SYNCWORDL )
			return i;
	}
	
	return -1;
}

/**************************************************************************************
 * Function:    AACGetLastFrameInfo
 *
 * Description: get info about last AAC frame decoded (number of samples decoded, 
 *                sample rate, bit rate, etc.)
 *
 * Inputs:      valid AAC decoder instance pointer (HAACDecoder)
 *              pointer to AACFrameInfo struct
 *
 * Outputs:     filled-in AACFrameInfo struct
 *
 * Return:      none
 *
 * Notes:       call this right after calling AACDecode()
 **************************************************************************************/
void AACGetLastFrameInfo(HAACDecoder hAACDecoder, AACFrameInfo *aacFrameInfo)
{
	AACDecInfo *aacDecInfo = (AACDecInfo *)hAACDecoder;

	if (!aacDecInfo) {
		aacFrameInfo->bitRate =       0;
		aacFrameInfo->nChans =        0;
		aacFrameInfo->sampRateCore =  0;
		aacFrameInfo->sampRateOut =   0;
		aacFrameInfo->bitsPerSample = 0;
		aacFrameInfo->outputSamps =   0;
		aacFrameInfo->profile =       0;
		aacFrameInfo->tnsUsed =       0;
		aacFrameInfo->pnsUsed =       0;
	} else {
		aacFrameInfo->bitRate =       aacDecInfo->bitRate;
		aacFrameInfo->nChans =        aacDecInfo->nChans;
		aacFrameInfo->sampRateCore =  aacDecInfo->sampRate;
		aacFrameInfo->sampRateOut =   aacDecInfo->sampRate * (aacDecInfo->sbrEnabled ? 2 : 1);
		aacFrameInfo->bitsPerSample = 16;
		aacFrameInfo->outputSamps =   aacDecInfo->nChans * AAC_MAX_NSAMPS * (aacDecInfo->sbrEnabled ? 2 : 1);
		aacFrameInfo->profile =       aacDecInfo->profile;
		aacFrameInfo->tnsUsed =       aacDecInfo->tnsUsed;
		aacFrameInfo->pnsUsed =       aacDecInfo->pnsUsed;
	}
}

/**************************************************************************************
 * Function:    AACSetRawBlockParams
 *
 * Description: set internal state variables for decoding a stream of raw data blocks
 *
 * Inputs:      valid AAC decoder instance pointer (HAACDecoder)
 *              flag indicating source of parameters
 *              AACFrameInfo struct, with the members nChans, sampRate, and profile
 *                optionally filled-in
 *
 * Outputs:     updated codec state 
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       if copyLast == 1, then the codec sets up its internal state (for 
 *                decoding raw blocks) based on previously-decoded ADTS header info
 *              if copyLast == 0, then the codec uses the values passed in
 *                aacFrameInfo to configure its internal state (useful when the
 *                source is MP4 format, for example)
 **************************************************************************************/
int AACSetRawBlockParams(HAACDecoder hAACDecoder, int copyLast, AACFrameInfo *aacFrameInfo)
{
	AACDecInfo *aacDecInfo = (AACDecInfo *)hAACDecoder;

	if (!aacDecInfo)
		return ERR_AAC_NULL_POINTER;

	aacDecInfo->format = AAC_FF_RAW;
	if (copyLast)
		return SetRawBlockParams(aacDecInfo, 1, 0, 0, 0);
	else
		return SetRawBlockParams(aacDecInfo, 0, aacFrameInfo->nChans, aacFrameInfo->sampRateCore, aacFrameInfo->profile);
}

/**************************************************************************************
 * Function:    AACFlushCodec
 *
 * Description: flush internal codec state (after seeking, for example)
 *
 * Inputs:      valid AAC decoder instance pointer (HAACDecoder)
 *
 * Outputs:     updated state variables in aacDecInfo
 *
 * Return:      0 if successful, error code (< 0) if error
 **************************************************************************************/
int AACFlushCodec(HAACDecoder hAACDecoder)
{
	int ch;
	AACDecInfo *aacDecInfo = (AACDecInfo *)hAACDecoder;

	if (!aacDecInfo)
		return ERR_AAC_NULL_POINTER;

	/* reset common state variables which change per-frame
	 * don't touch state variables which are (usually) constant for entire clip 
	 *   (nChans, sampRate, profile, format, sbrEnabled)
	 */
	aacDecInfo->prevBlockID = AAC_ID_INVALID;
	aacDecInfo->currBlockID = AAC_ID_INVALID;
	aacDecInfo->currInstTag = -1;
	for (ch = 0; ch < MAX_NCHANS_ELEM; ch++)
		aacDecInfo->sbDeinterleaveReqd[ch] = 0;
	aacDecInfo->adtsBlocksLeft = 0;
	aacDecInfo->tnsUsed = 0;
	aacDecInfo->pnsUsed = 0;

	/* reset internal codec state (flush overlap buffers, etc.) */
	FlushCodec(aacDecInfo);
#ifdef AAC_ENABLE_SBR
	FlushCodecSBR(aacDecInfo);
#endif

	return ERR_AAC_NONE;
}

/**************************************************************************************
 * Function:    AACDecode
 *
 * Description: decode AAC frame
 *
 * Inputs:      valid AAC decoder instance pointer (HAACDecoder)
 *              double pointer to buffer of AAC data
 *              pointer to number of valid bytes remaining in inbuf
 *              pointer to outbuf, big enough to hold one frame of decoded PCM samples
 *                (outbuf must be double-sized if SBR enabled)
 *
 * Outputs:     PCM data in outbuf, interleaved LRLRLR... if stereo
 *                number of output samples = 1024 per channel (2048 if SBR enabled)
 *              updated inbuf pointer
 *              updated bytesLeft
 *
 * Return:      0 if successful, error code (< 0) if error
 *
 * Notes:       inbuf pointer and bytesLeft are not updated until whole frame is
 *                successfully decoded, so if ERR_AAC_INDATA_UNDERFLOW is returned
 *                just call AACDecode again with more data in inbuf
 **************************************************************************************/
int AACDecode(HAACDecoder hAACDecoder, unsigned char **inbuf, int *bytesLeft, short *outbuf)
{
	int err, offset, bitOffset, bitsAvail;
	int ch, baseChan, elementChans;
	unsigned char *inptr;
	AACDecInfo *aacDecInfo = (AACDecInfo *)hAACDecoder;
#ifdef AAC_ENABLE_SBR
	int baseChanSBR, elementChansSBR;
#endif

	if (!aacDecInfo)
		return ERR_AAC_NULL_POINTER;

	/* make local copies (see "Notes" above) */
	inptr = *inbuf;
	bitOffset = 0;
	bitsAvail = (*bytesLeft) << 3;

	/* first time through figure out what the file format is */
	if (aacDecInfo->format == AAC_FF_Unknown) {
		if (bitsAvail < 32)
			return ERR_AAC_INDATA_UNDERFLOW;
		
		if (IS_ADIF(inptr)) {
			/* unpack ADIF header */
			aacDecInfo->format = AAC_FF_ADIF;
			err = UnpackADIFHeader(aacDecInfo, &inptr, &bitOffset, &bitsAvail);
			if (err)
				return err;
		} else {
			/* assume ADTS by default */
			aacDecInfo->format = AAC_FF_ADTS;
		}
	} 
	

	
	/* if ADTS, search for start of next frame */
	if (aacDecInfo->format == AAC_FF_ADTS) {
		/* can have 1-4 raw data blocks per ADTS frame (header only present for first one) */
		if (aacDecInfo->adtsBlocksLeft == 0) {
			offset = AACFindSyncWord(inptr, bitsAvail >> 3);
			if (offset < 0)
				return ERR_AAC_INDATA_UNDERFLOW;
			inptr += offset;
			bitsAvail -= (offset << 3);

			err = UnpackADTSHeader(aacDecInfo, &inptr, &bitOffset, &bitsAvail);
			if (err)
				return err;

			if (aacDecInfo->nChans == -1) {
				/* figure out implicit channel mapping if necessary */
				err = GetADTSChannelMapping(aacDecInfo, inptr, bitOffset, bitsAvail);
				if (err)
					return err;
			}
		}
		aacDecInfo->adtsBlocksLeft--;
	} else if (aacDecInfo->format == AAC_FF_RAW) {
		err = PrepareRawBlock(aacDecInfo);
		if (err)
			return err;
	}



	/* check for valid number of channels */
	if (aacDecInfo->nChans > AAC_MAX_NCHANS || aacDecInfo->nChans <= 0)
		return ERR_AAC_NCHANS_TOO_HIGH;

	/* will be set later if active in this frame */
	aacDecInfo->tnsUsed = 0;
	aacDecInfo->pnsUsed = 0;

	bitOffset = 0;
	baseChan = 0;
#ifdef AAC_ENABLE_SBR	
	baseChanSBR = 0;
#endif	
	do {
	

	
		/* parse next syntactic element */
		err = DecodeNextElement(aacDecInfo, &inptr, &bitOffset, &bitsAvail);
		if (err)
			return err;
		
		elementChans = elementNumChans[aacDecInfo->currBlockID];
		if (baseChan + elementChans > AAC_MAX_NCHANS)
			return ERR_AAC_NCHANS_TOO_HIGH;

		/* noiseless decoder and dequantizer */
		for (ch = 0; ch < elementChans; ch++) {
      PROFILE_START("noiseless decoder");
			err = DecodeNoiselessData(aacDecInfo, &inptr, &bitOffset, &bitsAvail, ch);
      PROFILE_END();
      			
			if (err)
				return err;

			PROFILE_START("dequant");
			if (Dequantize(aacDecInfo, ch))
				return ERR_AAC_DEQUANT;
      PROFILE_END();
		}

    PROFILE_START("mid-side and intensity stereo");
		/* mid-side and intensity stereo */
		if (aacDecInfo->currBlockID == AAC_ID_CPE) {
			if (StereoProcess(aacDecInfo))
				return ERR_AAC_STEREO_PROCESS;
		}
    PROFILE_END();


		/* PNS, TNS, inverse transform */
		for (ch = 0; ch < elementChans; ch++) {
      PROFILE_START("PNS");
			if (PNS(aacDecInfo, ch))
				return ERR_AAC_PNS;
      PROFILE_END();

			if (aacDecInfo->sbDeinterleaveReqd[ch]) {
				/* deinterleave short blocks, if required */
				if (DeinterleaveShortBlocks(aacDecInfo, ch))
					return ERR_AAC_SHORT_BLOCK_DEINT;
				aacDecInfo->sbDeinterleaveReqd[ch] = 0;
			}

      PROFILE_START("TNS");
			if (TNSFilter(aacDecInfo, ch))
				return ERR_AAC_TNS;
      PROFILE_END();
	
      PROFILE_START("IMDCT");
			if (IMDCT(aacDecInfo, ch, baseChan + ch, outbuf))
				return ERR_AAC_IMDCT;
      PROFILE_END();
		}

#ifdef AAC_ENABLE_SBR
		if (aacDecInfo->sbrEnabled && (aacDecInfo->currBlockID == AAC_ID_FIL || aacDecInfo->currBlockID == AAC_ID_LFE)) {
			if (aacDecInfo->currBlockID == AAC_ID_LFE)
				elementChansSBR = elementNumChans[AAC_ID_LFE];
			else if (aacDecInfo->currBlockID == AAC_ID_FIL && (aacDecInfo->prevBlockID == AAC_ID_SCE || aacDecInfo->prevBlockID == AAC_ID_CPE))
				elementChansSBR = elementNumChans[aacDecInfo->prevBlockID];
			else 
				elementChansSBR = 0;
			
			if (baseChanSBR + elementChansSBR > AAC_MAX_NCHANS)
				return ERR_AAC_SBR_NCHANS_TOO_HIGH;

			/* parse SBR extension data if present (contained in a fill element) */
			if (DecodeSBRBitstream(aacDecInfo, baseChanSBR))
				return ERR_AAC_SBR_BITSTREAM;

			/* apply SBR */
			if (DecodeSBRData(aacDecInfo, baseChanSBR, outbuf))
				return ERR_AAC_SBR_DATA;

			baseChanSBR += elementChansSBR;
		}
#endif
		
		baseChan += elementChans;
	} while (aacDecInfo->currBlockID != AAC_ID_END);

	/* byte align after each raw_data_block */
	if (bitOffset) {
		inptr++;
		bitsAvail -= (8-bitOffset);
		bitOffset = 0;
		if (bitsAvail < 0)
			return ERR_AAC_INDATA_UNDERFLOW;
	}

	/* update pointers */
	aacDecInfo->frameCount++;
	*bytesLeft -= (inptr - *inbuf);
	*inbuf = inptr;

	return ERR_AAC_NONE;
}



// decoder
//#ifdef WORDS_BIGENDIAN
#define VLC_FOURCC(a, b, c, d)	( ((uint32_t)d) | ( ((uint32_t)c)<<8 ) | ( ((uint32_t)b)<<16 ) | ( ((uint32_t)a)<<24 ) )
#define VLC_TWOCC(a, b)		( (uint16_t)(b) | ( (uint16_t)(a)<<8 ) )

/*#else
#define VLC_FOURCC(a, b, c, d)	( ((uint32_t)a) | ( ((uint32_t)b)<<8 ) | ( ((uint32_t)c)<<16 ) | ( ((uint32_t)d)<<24 ) )
#define VLC_TWOCC( a, b )	( (uint16_t)(a) | ( (uint16_t)(b)<<8 ) )

#endif*/
#define ATOM_soun		VLC_FOURCC( 's', 'o', 'u', 'n' )
#define AAC_BUF_SIZE		(AAC_MAX_NCHANS * AAC_MAX_NSAMPS)	// AAC output buffer
// read big endian 16-Bit from fileposition
uint16_t uaac_read16(size_t pos, int fd)
{
	uint16_t tmp16;
	lseek(fd, pos, SEEK_SET);
	read(fd, &tmp16, sizeof(uint16_t));
	return REV16(tmp16);
}
// read big endian 32-Bit from fileposition
uint32_t uaac_read32(size_t pos, int fd)
{
	uint32_t tmp32;
	lseek(fd, pos, SEEK_SET);
	read(fd, &tmp32, sizeof(uint32_t));
	return REV32(tmp32);
}
typedef struct { unsigned int pos; unsigned int size; } _ATOM;
typedef struct { uint32_t size; char name[4]; } _ATOMINFO;
_ATOM uaac_findMp4Atom(const char *atom, const uint32_t pos, const int loop, int fd)
{
	int r;
	_ATOM ret;
	_ATOMINFO info;

	ret.pos = pos;
	do {
		r = lseek(fd, ret.pos, SEEK_SET);
		read(fd, &info, sizeof(info));
		ret.size = REV32(info.size);
		//printf("%x +%x [%s][%s]\n",ret.pos,ret.size,atom,info.name);
		if (!strncmp(atom, info.name, 4)) return ret;
		if (ret.size<=8) break;
		ret.pos += ret.size;
	} while (loop && r>=0);

	printf("[%s] is not found!\n", atom);
	ret.pos = 0;
	ret.size = 0;
	return ret;
}
#if 0
int uaac_setupMp4(HAACDecoder aac, AACFrameInfo *aacFrameInfo, int fd)
{
	_ATOM ftyp = uaac_findMp4Atom("ftyp", 0, 0, fd);
	if (!ftyp.size) return 0; // no mp4/m4a file

	// go through the boxes to find the interesting atoms:
	uint32_t moov = uaac_findMp4Atom("moov", 0, 1, fd).pos;
//uint32_t mdia, type;
//	do {
	uint32_t trak = uaac_findMp4Atom("trak", moov + 8, 1, fd).pos;
	uint32_t mdia = uaac_findMp4Atom("mdia", trak + 8, 1, fd).pos;

	uint32_t hdlr = uaac_findMp4Atom("hdlr", mdia + 8, 1, fd).pos;
	uint32_t type = uaac_read32(hdlr + 8 + 0x08, fd);
printf("type:%x/%x\n",type, ATOM_soun);
//moov = hdlr;
//	} while (type != ATOM_soun);

	// determine duration:
	uint32_t mdhd = uaac_findMp4Atom("mdhd", mdia + 8, 1, fd).pos;
	uint32_t timescale = uaac_read32(mdhd + 8 + 0x0c, fd);
	unsigned int duration = 1000.0 * ((float)uaac_read32(mdhd + 8 + 0x10, fd) / (float)timescale);

	// MP4-data has no aac-frames, so we have to set the parameters by hand.
	uint32_t minf = uaac_findMp4Atom("minf", mdia + 8, 1, fd).pos;
	uint32_t stbl = uaac_findMp4Atom("stbl", minf + 8, 1, fd).pos;
	// stsd sample description box: - infos to parametrize the decoder
	_ATOM stsd = uaac_findMp4Atom("stsd", stbl + 8, 1, fd);
	if (!stsd.size) return 0; // something is not ok

	uint16_t channels = uaac_read16(stsd.pos + 8 + 0x20, fd);
	//uint16_t bits = uaac_read16(stsd.pos + 8 + 0x22); // not used
	uint16_t samplerate = uaac_read32(stsd.pos + 8 + 0x26, fd);

	memset(aacFrameInfo, 0, sizeof(AACFrameInfo));
	aacFrameInfo->nChans = channels;
	//aacFrameInfo.bitsPerSample = bits; // not used
	aacFrameInfo->sampRateCore = samplerate;
	aacFrameInfo->profile = AAC_PROFILE_LC;
	AACSetRawBlockParams(aac, 0, aacFrameInfo);

	// stco - chunk offset atom:
	uint32_t stco = uaac_findMp4Atom("stco", stbl + 8, 1, fd).pos;

	// number of chunks:
	uint32_t nChunks = uaac_read32(stco + 8 + 0x04, fd);
	// first entry from chunk table:
	uint32_t firstChunk = uaac_read32(stco + 8 + 0x08, fd);
	// last entry from chunk table:
	uint32_t lastChunk = uaac_read32(stco + 8 + 0x04 + nChunks * 4, fd);

	if (nChunks == 1) {
		_ATOM mdat = uaac_findMp4Atom("mdat", 0, 1, fd);
		lastChunk = mdat.size;
	}
#if 0
	else {
		printf("stco[%d]:\n", nChunks);
		for (int i=1; i<=nChunks; i++) {
			printf(" %d", uaac_read32(stco +8+4 +i*4, fd));
		}

		uint32_t stsc = uaac_findMp4Atom("stsc", stbl + 8, 1, fd).pos;
		uint32_t n = uaac_read32(stsc + 8 + 0x04, fd);
		printf("\nstsc[%d]:\n", n);
		for (int i=0; i<n; i++) {
			// i_first_chunk i_samples_per_chunk i_sample_description_index
			printf(" %d-%d-%d", uaac_read32(stsc +8+8 +i*4*3, fd), uaac_read32(stsc +8+8 +i*4*3+4, fd), uaac_read32(stsc +8+8 +i*4*3+8, fd));
		}

		uint32_t stsz = uaac_findMp4Atom("stsz", stbl + 8, 1, fd).pos;
		//uint32_t n = uaac_read32(stsz + 8 + 0x04, fd);//sample size
		/*uint32_t*/ n = uaac_read32(stsz + 8 + 0x08, fd);
		printf("\nstsz[%d]:\n", n);
		for (int i=1; i<=/*n*/50; i++) {
			printf(" %d", uaac_read32(stsz +8+8 +i*4, fd));
		}

		int samplesPerChunk = uaac_read32(stsc +8+4 +8, fd);
		printf("\nsamplesPerChunk:%d\n", samplesPerChunk);
		for (int i=0; i<nChunks; i++) {
			int c = 0;
			for (int j=0; j<samplesPerChunk; j++) {
				c += uaac_read32(stsz +8+12 +(i*samplesPerChunk+j)*4, fd);
			}
			printf(" %d/%d", uaac_read32(stco +8+8 +i*4, fd), c);
		}
	}
#endif
#if 0
	printf("mdhd duration %dms, stsd: chan=%d samplerate=%d nChunks=%d", duration, channels, samplerate, nChunks);
	printf(" firstChunk=%x lastChunk=%x\n", firstChunk, lastChunk);
#endif
	return firstChunk;
}
#endif
uint8_t *uaac_extract_aac(int fd, int *len, int *samplerate, int *channels)
{
	_ATOM ftyp = uaac_findMp4Atom("ftyp", 0, 0, fd);
	if (!ftyp.size) return 0; // no mp4/m4a file

	// go through the boxes to find the interesting atoms:
	uint32_t moov = uaac_findMp4Atom("moov", 0, 1, fd).pos;
	uint32_t mdia;
	for (int i=0; i<10; i++) {
		_ATOM trak = uaac_findMp4Atom("trak", moov + 8, 1, fd);
		mdia = uaac_findMp4Atom("mdia", trak.pos + 8, 1, fd).pos;

		uint32_t hdlr = uaac_findMp4Atom("hdlr", mdia + 8, 1, fd).pos;
		uint32_t type = uaac_read32(hdlr + 8 + 0x08, fd);

		if (type == ATOM_soun) break;
//		if (!trak.pos) return 0; // error
		moov = trak.pos + trak.size -8;
		printf("type:%x/%x %x %x\n", type, ATOM_soun, trak.pos, moov);
		if (!trak.pos) return 0; // error
	}

	// determine duration:
//	uint32_t mdhd = uaac_findMp4Atom("mdhd", mdia + 8, 1, fd).pos;
//	uint32_t timescale = uaac_read32(mdhd + 8 + 0x0c, fd);
//	unsigned int duration = 1000.0 * ((float)uaac_read32(mdhd + 8 + 0x10, fd) / (float)timescale);

	// MP4-data has no aac-frames, so we have to set the parameters by hand.
	uint32_t minf = uaac_findMp4Atom("minf", mdia + 8, 1, fd).pos;
	uint32_t stbl = uaac_findMp4Atom("stbl", minf + 8, 1, fd).pos;
	// stsd sample description box: - infos to parametrize the decoder
	_ATOM stsd = uaac_findMp4Atom("stsd", stbl + 8, 1, fd);
	if (!stsd.size) return 0; // something is not ok

	*channels = uaac_read16(stsd.pos + 8 + 0x20, fd);
	//uint16_t bits = uaac_read16(stsd.pos + 8 + 0x22); // not used
	*samplerate = uaac_read32(stsd.pos + 8 + 0x26, fd);

	// stco - chunk offset atom:
	uint32_t stco = uaac_findMp4Atom("stco", stbl + 8, 1, fd).pos;

	// number of chunks:
	uint32_t nChunks = uaac_read32(stco + 8 + 0x04, fd);

	uint32_t pos[nChunks];
	uint32_t size[nChunks];
	uint32_t stsz = uaac_findMp4Atom("stsz", stbl + 8, 1, fd).pos;
	uint32_t stsc = uaac_findMp4Atom("stsc", stbl + 8, 1, fd).pos;
	int samplesPerChunk = uaac_read32(stsc +8+4 +8, fd);
	if (samplesPerChunk>65535) {
		printf("error at samplesPerChunk:%d\n", samplesPerChunk);
		return 0; // something is bad
	}
	int c = 0;
	for (int i=0; i<nChunks-1; i++) {
		size[i] = 0;
		for (int j=0; j<samplesPerChunk; j++) {
			size[i] += uaac_read32(stsz +8+12 +(i*samplesPerChunk+j)*4, fd);
		}
		c += size[i];
		pos[i] = uaac_read32(stco +8+8 +i*4, fd);
//		printf(" %d", c);
	}
//	printf("samplesPerChunk:%d dataSize:%d\n", samplesPerChunk, c);
	if (uaac_findMp4Atom("mdat", 0, 1, fd).size < c) return 0; // size is not ok

	*len = c;
	uint8_t *data = (uint8_t*)malloc(c);
	if (!data) return 0; // memory error!
	uint8_t *p = data;
	for (int i=0; i<nChunks-1; i++) {
		lseek(fd, pos[i], SEEK_SET);
		read(fd, p, size[i]);
		p += size[i];
	}

	return data;
}