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h264_slice_data.c
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h264_slice_data.c
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/*
* h264bitstream - a library for reading and writing H.264 video
* Copyright (C) 2005-2007 Auroras Entertainment, LLC
* Copyright (C) 2008-2011 Avail-TVN
* Copyright (C) 2012 Alex Izvorski
*
* Written by Alex Izvorski <[email protected]> and Alex Giladi <[email protected]>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include "h264_stream.h"
#include "h264_slice_data.h"
void read_slice_data( h264_stream_t* h, bs_t* b );
void read_macroblock_layer( h264_stream_t* h, bs_t* b );
void read_mb_pred( h264_stream_t* h, bs_t* b, int mb_type );
void read_sub_mb_pred( h264_stream_t* h, bs_t* b, int mb_type );
void read_residual( h264_stream_t* h, bs_t* b );
void read_residual_block_cavlc( bs_t* b, int* coeffLevel, int maxNumCoeff );
void read_residual_block_cabac( bs_t* b, int* coeffLevel, int maxNumCoeff );
//7.3.4 Slice data syntax
void read_slice_data( h264_stream_t* h, bs_t* b )
{
macroblock_t* mb;
if( h->pps->entropy_coding_mode_flag )
{
while( !bs_byte_aligned(b) )
{
/* cabac_alignment_one_bit */ bs_skip_u(b, 1);
}
}
int CurrMbAddr = h->sh->first_mb_in_slice * ( 1 + MbaffFrameFlag );
int moreDataFlag = 1;
int prevMbSkipped = 0;
do
{
int mb_skip_flag;
int mb_skip_run;
if( h->sh->slice_type != SH_SLICE_TYPE_I && h->sh->slice_type != SH_SLICE_TYPE_SI )
{
if( !h->pps->entropy_coding_mode_flag )
{
mb_skip_run = bs_read_ue(b);
prevMbSkipped = ( mb_skip_run > 0 );
for( int i=0; i<mb_skip_run; i++ )
{
CurrMbAddr = NextMbAddress( CurrMbAddr );
}
moreDataFlag = more_rbsp_data( );
}
else
{
mb_skip_flag = bs_read_ae(b);
moreDataFlag = !mb_skip_flag;
}
}
if( moreDataFlag )
{
if( MbaffFrameFlag && ( CurrMbAddr % 2 == 0 ||
( CurrMbAddr % 2 == 1 && prevMbSkipped ) ) )
{
if (cabac) { mb->mb_field_decoding_flag = bs_read_ae(b); }
else { mb->mb_field_decoding_flag = bs_read_u(b, 1); }
}
read_macroblock_layer( h, b );
}
if( !h->pps->entropy_coding_mode_flag )
{
moreDataFlag = more_rbsp_data( );
}
else
{
if( h->sh->slice_type != SH_SLICE_TYPE_I && h->sh->slice_type != SH_SLICE_TYPE_SI )
{
prevMbSkipped = mb_skip_flag;
}
if( MbaffFrameFlag && CurrMbAddr % 2 == 0 )
{
moreDataFlag = 1;
}
else
{
int end_of_slice_flag;
end_of_slice_flag = bs_read_ae(b);
moreDataFlag = !end_of_slice_flag;
}
}
CurrMbAddr = NextMbAddress( CurrMbAddr );
} while( moreDataFlag );
}
//7.3.5 Macroblock layer syntax
void read_macroblock_layer( h264_stream_t* h, bs_t* b )
{
macroblock_t* mb;
if (cabac) { mb->mb_type = bs_read_ae(b); }
else { mb->mb_type = bs_read_ue(b); }
if( mb->mb_type == I_PCM )
{
while( !bs_byte_aligned(b) )
{
// ERROR: value( pcm_alignment_zero_bit, f(1) );
}
for( int i = 0; i < 256; i++ )
{
mb->pcm_sample_luma[ i ] = bs_read_u8(b);
}
for( int i = 0; i < 2 * MbWidthC * MbHeightC; i++ )
{
mb->pcm_sample_chroma[ i ] = bs_read_u8(b);
}
}
else
{
int noSubMbPartSizeLessThan8x8Flag = 1;
if( mb->mb_type != I_NxN &&
MbPartPredMode( mb->mb_type, 0 ) != Intra_16x16 &&
NumMbPart( mb->mb_type ) == 4 )
{
read_sub_mb_pred( h, b, mb->mb_type );
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 )
{
if( NumSubMbPart( mb->sub_mb_type[ mbPartIdx ] ) > 1 )
{
noSubMbPartSizeLessThan8x8Flag = 0;
}
}
else if( !h->sps->direct_8x8_inference_flag )
{
noSubMbPartSizeLessThan8x8Flag = 0;
}
}
}
else
{
if( h->pps->transform_8x8_mode_flag && mb->mb_type == I_NxN )
{
if (cabac) { mb->transform_size_8x8_flag = bs_read_ae(b); }
else { mb->transform_size_8x8_flag = bs_read_u(b, 1); }
}
read_mb_pred( h, b, mb->mb_type );
}
if( MbPartPredMode( mb->mb_type, 0 ) != Intra_16x16 )
{
if (cabac) { mb->coded_block_pattern = bs_read_ae(b); }
else { mb->coded_block_pattern = bs_read_me(b); }
if( CodedBlockPatternLuma > 0 &&
h->pps->transform_8x8_mode_flag && mb->mb_type != I_NxN &&
noSubMbPartSizeLessThan8x8Flag &&
( mb->mb_type != B_Direct_16x16 || h->sps->direct_8x8_inference_flag ) )
{
if (cabac) { mb->transform_size_8x8_flag = bs_read_ae(b); }
else { mb->transform_size_8x8_flag = bs_read_u(b, 1); }
}
}
if( CodedBlockPatternLuma > 0 || CodedBlockPatternChroma > 0 ||
MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
if (cabac) { mb->mb_qp_delta = bs_read_ae(b); }
else { mb->mb_qp_delta = bs_read_se(b); }
read_residual( h, b );
}
}
}
//7.3.5.1 Macroblock prediction syntax
void read_mb_pred( h264_stream_t* h, bs_t* b, int mb_type )
{
macroblock_t* mb;
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_4x4 ||
MbPartPredMode( mb->mb_type, 0 ) == Intra_8x8 ||
MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_4x4 )
{
for( int luma4x4BlkIdx=0; luma4x4BlkIdx<16; luma4x4BlkIdx++ )
{
if (cabac) { mb->prev_intra4x4_pred_mode_flag[ luma4x4BlkIdx ] = bs_read_ae(b); }
else { mb->prev_intra4x4_pred_mode_flag[ luma4x4BlkIdx ] = bs_read_u(b, 1); }
if( !mb->prev_intra4x4_pred_mode_flag[ luma4x4BlkIdx ] )
{
if (cabac) { mb->rem_intra4x4_pred_mode[ luma4x4BlkIdx ] = bs_read_ae(b); }
else { mb->rem_intra4x4_pred_mode[ luma4x4BlkIdx ] = bs_read_u(b, 3); }
}
}
}
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_8x8 )
{
for( int luma8x8BlkIdx=0; luma8x8BlkIdx<4; luma8x8BlkIdx++ )
{
if (cabac) { mb->prev_intra8x8_pred_mode_flag[ luma8x8BlkIdx ] = bs_read_ae(b); }
else { mb->prev_intra8x8_pred_mode_flag[ luma8x8BlkIdx ] = bs_read_u(b, 1); }
if( !mb->prev_intra8x8_pred_mode_flag[ luma8x8BlkIdx ] )
{
if (cabac) { mb->rem_intra8x8_pred_mode[ luma8x8BlkIdx ] = bs_read_ae(b); }
else { mb->rem_intra8x8_pred_mode[ luma8x8BlkIdx ] = bs_read_u(b, 3); }
}
}
}
if( h->sps->chroma_format_idc != 0 )
{
if (cabac) { mb->intra_chroma_pred_mode = bs_read_ae(b); }
else { mb->intra_chroma_pred_mode = bs_read_ue(b); }
}
}
else if( MbPartPredMode( mb->mb_type, 0 ) != Direct )
{
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( ( h->pps->num_ref_idx_l0_active_minus1 > 0 ||
mb->mb_field_decoding_flag ) &&
MbPartPredMode( mb->mb_type, mbPartIdx ) != Pred_L1 )
{
if (cabac) { mb->ref_idx_l0[ mbPartIdx ] = bs_read_ae(b); }
else { mb->ref_idx_l0[ mbPartIdx ] = bs_read_te(b); }
}
}
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( ( h->pps->num_ref_idx_l1_active_minus1 > 0 ||
mb->mb_field_decoding_flag ) &&
MbPartPredMode( mb->mb_type, mbPartIdx ) != Pred_L0 )
{
if (cabac) { mb->ref_idx_l1[ mbPartIdx ] = bs_read_ae(b); }
else { mb->ref_idx_l1[ mbPartIdx ] = bs_read_te(b); }
}
}
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( MbPartPredMode ( mb->mb_type, mbPartIdx ) != Pred_L1 )
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { mb->mvd_l0[ mbPartIdx ][ 0 ][ compIdx ] = bs_read_ae(b); }
else { mb->mvd_l0[ mbPartIdx ][ 0 ][ compIdx ] = bs_read_se(b); }
}
}
}
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( MbPartPredMode( mb->mb_type, mbPartIdx ) != Pred_L0 )
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { mb->mvd_l1[ mbPartIdx ][ 0 ][ compIdx ] = bs_read_ae(b); }
else { mb->mvd_l1[ mbPartIdx ][ 0 ][ compIdx ] = bs_read_se(b); }
}
}
}
}
}
//7.3.5.2 Sub-macroblock prediction syntax
void read_sub_mb_pred( h264_stream_t* h, bs_t* b, int mb_type )
{
macroblock_t* mb;
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if (cabac) { mb->sub_mb_type[ mbPartIdx ] = bs_read_ae(b); }
else { mb->sub_mb_type[ mbPartIdx ] = bs_read_ue(b); }
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( ( h->pps->num_ref_idx_l0_active_minus1 > 0 || mb->mb_field_decoding_flag ) &&
mb->mb_type != P_8x8ref0 &&
mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L1 )
{
if (cabac) { mb->ref_idx_l0[ mbPartIdx ] = bs_read_ae(b); }
else { mb->ref_idx_l0[ mbPartIdx ] = bs_read_te(b); }
}
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( (h->pps->num_ref_idx_l1_active_minus1 > 0 || mb->mb_field_decoding_flag ) &&
mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L0 )
{
if (cabac) { mb->ref_idx_l1[ mbPartIdx ] = bs_read_ae(b); }
else { mb->ref_idx_l1[ mbPartIdx ] = bs_read_te(b); }
}
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L1 )
{
for( int subMbPartIdx = 0;
subMbPartIdx < NumSubMbPart( mb->sub_mb_type[ mbPartIdx ] );
subMbPartIdx++)
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { mb->mvd_l0[ mbPartIdx ][ subMbPartIdx ][ compIdx ] = bs_read_ae(b); }
else { mb->mvd_l0[ mbPartIdx ][ subMbPartIdx ][ compIdx ] = bs_read_se(b); }
}
}
}
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L0 )
{
for( int subMbPartIdx = 0;
subMbPartIdx < NumSubMbPart( mb->sub_mb_type[ mbPartIdx ] );
subMbPartIdx++)
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { mb->mvd_l1[ mbPartIdx ][ subMbPartIdx ][ compIdx ] = bs_read_ae(b); }
else { mb->mvd_l1[ mbPartIdx ][ subMbPartIdx ][ compIdx ] = bs_read_se(b); }
}
}
}
}
}
//7.3.5.3 Residual data syntax
void read_residual( h264_stream_t* h, bs_t* b )
{
macroblock_t* mb;
/*
if( !h->pps->entropy_coding_mode_flag )
{
residual_block = residual_block_cavlc;
}
else
{
residual_block = residual_block_cabac;
}
*/
// FIXME
#define read_residual_block read_residual_block_cavlc
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
read_residual_block( b, mb->Intra16x16DCLevel, 16 );
}
for( int i8x8 = 0; i8x8 < 4; i8x8++ ) // each luma 8x8 block
{
if( !mb->transform_size_8x8_flag || !h->pps->entropy_coding_mode_flag )
{
for( int i4x4 = 0; i4x4 < 4; i4x4++ ) // each 4x4 sub-block of block
{
if( CodedBlockPatternLuma & ( 1 << i8x8 ) )
{
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
read_residual_block( b, mb->Intra16x16ACLevel[ i8x8 * 4 + i4x4 ], 15 );
}
else
{
read_residual_block( b, mb->LumaLevel[ i8x8 * 4 + i4x4 ], 16 );
}
}
else if( MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
for( int i = 0; i < 15; i++ )
{
mb->Intra16x16ACLevel[ i8x8 * 4 + i4x4 ][ i ] = 0;
}
}
else
{
for( int i = 0; i < 16; i++ )
{
mb->LumaLevel[ i8x8 * 4 + i4x4 ][ i ] = 0;
}
}
if( !h->pps->entropy_coding_mode_flag && mb->transform_size_8x8_flag )
{
for( int i = 0; i < 16; i++ )
{
mb->LumaLevel8x8[ i8x8 ][ 4 * i + i4x4 ] = mb->LumaLevel[ i8x8 * 4 + i4x4 ][ i ];
}
}
}
}
else if( CodedBlockPatternLuma & ( 1 << i8x8 ) )
{
read_residual_block( b, mb->LumaLevel8x8[ i8x8 ], 64 );
}
else
{
for( int i = 0; i < 64; i++ )
{
mb->LumaLevel8x8[ i8x8 ][ i ] = 0;
}
}
}
if( h->sps->chroma_format_idc != 0 )
{
int NumC8x8 = 4 / ( SubWidthC * SubHeightC );
for( int iCbCr = 0; iCbCr < 2; iCbCr++ )
{
if( CodedBlockPatternChroma & 3 ) // chroma DC residual present
{
read_residual_block( b, mb->ChromaDCLevel[ iCbCr ], 4 * NumC8x8 );
}
else
{
for( int i = 0; i < 4 * NumC8x8; i++ )
{
mb->ChromaDCLevel[ iCbCr ][ i ] = 0;
}
}
}
for( int iCbCr = 0; iCbCr < 2; iCbCr++ )
{
for( int i8x8 = 0; i8x8 < NumC8x8; i8x8++ )
{
for( int i4x4 = 0; i4x4 < 4; i4x4++ )
{
if( CodedBlockPatternChroma & 2 ) // chroma AC residual present
{
read_residual_block( b, mb->ChromaACLevel[ iCbCr ][ i8x8*4+i4x4 ], 15);
}
else
{
for( int i = 0; i < 15; i++ )
{
mb->ChromaACLevel[ iCbCr ][ i8x8*4+i4x4 ][ i ] = 0;
}
}
}
}
}
}
}
//7.3.5.3.1 Residual block CAVLC syntax
void read_residual_block_cavlc( bs_t* b, int* coeffLevel, int maxNumCoeff )
{
int level[256];
int run[256];
for( int i = 0; i < maxNumCoeff; i++ )
{
coeffLevel[ i ] = 0;
}
int coeff_token;
coeff_token = bs_read_ce(b);
int suffixLength;
if( TotalCoeff( coeff_token ) > 0 )
{
if( TotalCoeff( coeff_token ) > 10 && TrailingOnes( coeff_token ) < 3 )
{
suffixLength = 1;
}
else
{
suffixLength = 0;
}
for( int i = 0; i < TotalCoeff( coeff_token ); i++ )
{
if( i < TrailingOnes( coeff_token ) )
{
int trailing_ones_sign_flag;
trailing_ones_sign_flag = bs_read_u(b, 1);
level[ i ] = 1 - 2 * trailing_ones_sign_flag;
}
else
{
int level_prefix;
level_prefix = bs_read_ce(b);
int levelCode;
levelCode = ( Min( 15, level_prefix ) << suffixLength );
if( suffixLength > 0 || level_prefix >= 14 )
{
int level_suffix;
// ERROR: value( level_suffix, u ); // FIXME
levelCode += level_suffix;
}
if( level_prefix >= 15 && suffixLength == 0 )
{
levelCode += 15;
}
if( level_prefix >= 16 )
{
levelCode += ( 1 << ( level_prefix - 3 ) ) - 4096;
}
if( i == TrailingOnes( coeff_token ) &&
TrailingOnes( coeff_token ) < 3 )
{
levelCode += 2;
}
if( levelCode % 2 == 0 )
{
level[ i ] = ( levelCode + 2 ) >> 1;
}
else
{
level[ i ] = ( -levelCode - 1 ) >> 1;
}
if( suffixLength == 0 )
{
suffixLength = 1;
}
if( Abs( level[ i ] ) > ( 3 << ( suffixLength - 1 ) ) &&
suffixLength < 6 )
{
suffixLength++;
}
}
}
int zerosLeft;
if( TotalCoeff( coeff_token ) < maxNumCoeff )
{
int total_zeros;
total_zeros = bs_read_ce(b);
zerosLeft = total_zeros;
} else
{
zerosLeft = 0;
}
for( int i = 0; i < TotalCoeff( coeff_token ) - 1; i++ )
{
if( zerosLeft > 0 )
{
int run_before;
run_before = bs_read_ce(b);
run[ i ] = run_before;
} else
{
run[ i ] = 0;
}
zerosLeft = zerosLeft - run[ i ];
}
run[ TotalCoeff( coeff_token ) - 1 ] = zerosLeft;
int coeffNum = -1;
for( int i = TotalCoeff( coeff_token ) - 1; i >= 0; i-- )
{
coeffNum += run[ i ] + 1;
coeffLevel[ coeffNum ] = level[ i ];
}
}
}
#ifdef HAVE_CABAC
//7.3.5.3.2 Residual block CABAC syntax
void read_residual_block_cabac( bs_t* b, int* coeffLevel, int maxNumCoeff )
{
if( maxNumCoeff == 64 )
{
coded_block_flag = 1;
}
else
{
coded_block_flag = bs_read_ae(b);
}
if( coded_block_flag )
{
numCoeff = maxNumCoeff;
int i=0;
do
{
significant_coeff_flag[ i ] = bs_read_ae(b);
if( significant_coeff_flag[ i ] )
{
last_significant_coeff_flag[ i ] = bs_read_ae(b);
if( last_significant_coeff_flag[ i ] )
{
numCoeff = i + 1;
for( int j = numCoeff; j < maxNumCoeff; j++ )
{
coeffLevel[ j ] = 0;
}
}
}
i++;
} while( i < numCoeff - 1 );
coeff_abs_level_minus1[ numCoeff - 1 ] = bs_read_ae(b);
coeff_sign_flag[ numCoeff - 1 ] = bs_read_ae(b);
coeffLevel[ numCoeff - 1 ] =
( coeff_abs_level_minus1[ numCoeff - 1 ] + 1 ) *
( 1 - 2 * coeff_sign_flag[ numCoeff - 1 ] );
for( int i = numCoeff - 2; i >= 0; i-- )
{
if( significant_coeff_flag[ i ] )
{
coeff_abs_level_minus1[ i ] = bs_read_ae(b);
coeff_sign_flag[ i ] = bs_read_ae(b);
coeffLevel[ i ] = ( coeff_abs_level_minus1[ i ] + 1 ) *
( 1 - 2 * coeff_sign_flag[ i ] );
}
else
{
coeffLevel[ i ] = 0;
}
}
}
else
{
for( int i = 0; i < maxNumCoeff; i++ )
{
coeffLevel[ i ] = 0;
}
}
}
#endif
void write_slice_data( h264_stream_t* h, bs_t* b );
void write_macroblock_layer( h264_stream_t* h, bs_t* b );
void write_mb_pred( h264_stream_t* h, bs_t* b, int mb_type );
void write_sub_mb_pred( h264_stream_t* h, bs_t* b, int mb_type );
void write_residual( h264_stream_t* h, bs_t* b );
void write_residual_block_cavlc( bs_t* b, int* coeffLevel, int maxNumCoeff );
void write_residual_block_cabac( bs_t* b, int* coeffLevel, int maxNumCoeff );
//7.3.4 Slice data syntax
void write_slice_data( h264_stream_t* h, bs_t* b )
{
macroblock_t* mb;
if( h->pps->entropy_coding_mode_flag )
{
while( !bs_byte_aligned(b) )
{
/* cabac_alignment_one_bit */ bs_write_u(b, 1, 1);
}
}
int CurrMbAddr = h->sh->first_mb_in_slice * ( 1 + MbaffFrameFlag );
int moreDataFlag = 1;
int prevMbSkipped = 0;
do
{
int mb_skip_flag;
int mb_skip_run;
if( h->sh->slice_type != SH_SLICE_TYPE_I && h->sh->slice_type != SH_SLICE_TYPE_SI )
{
if( !h->pps->entropy_coding_mode_flag )
{
bs_write_ue(b, mb_skip_run);
prevMbSkipped = ( mb_skip_run > 0 );
for( int i=0; i<mb_skip_run; i++ )
{
CurrMbAddr = NextMbAddress( CurrMbAddr );
}
moreDataFlag = more_rbsp_data( );
}
else
{
bs_write_ae(b, mb_skip_flag);
moreDataFlag = !mb_skip_flag;
}
}
if( moreDataFlag )
{
if( MbaffFrameFlag && ( CurrMbAddr % 2 == 0 ||
( CurrMbAddr % 2 == 1 && prevMbSkipped ) ) )
{
if (cabac) { bs_write_ae(b, mb->mb_field_decoding_flag); }
else { bs_write_u(b, 1, mb->mb_field_decoding_flag); }
}
write_macroblock_layer( h, b );
}
if( !h->pps->entropy_coding_mode_flag )
{
moreDataFlag = more_rbsp_data( );
}
else
{
if( h->sh->slice_type != SH_SLICE_TYPE_I && h->sh->slice_type != SH_SLICE_TYPE_SI )
{
prevMbSkipped = mb_skip_flag;
}
if( MbaffFrameFlag && CurrMbAddr % 2 == 0 )
{
moreDataFlag = 1;
}
else
{
int end_of_slice_flag;
bs_write_ae(b, end_of_slice_flag);
moreDataFlag = !end_of_slice_flag;
}
}
CurrMbAddr = NextMbAddress( CurrMbAddr );
} while( moreDataFlag );
}
//7.3.5 Macroblock layer syntax
void write_macroblock_layer( h264_stream_t* h, bs_t* b )
{
macroblock_t* mb;
if (cabac) { bs_write_ae(b, mb->mb_type); }
else { bs_write_ue(b, mb->mb_type); }
if( mb->mb_type == I_PCM )
{
while( !bs_byte_aligned(b) )
{
// ERROR: value( pcm_alignment_zero_bit, f(1) );
}
for( int i = 0; i < 256; i++ )
{
bs_write_u8(b, mb->pcm_sample_luma[ i ]);
}
for( int i = 0; i < 2 * MbWidthC * MbHeightC; i++ )
{
bs_write_u8(b, mb->pcm_sample_chroma[ i ]);
}
}
else
{
int noSubMbPartSizeLessThan8x8Flag = 1;
if( mb->mb_type != I_NxN &&
MbPartPredMode( mb->mb_type, 0 ) != Intra_16x16 &&
NumMbPart( mb->mb_type ) == 4 )
{
write_sub_mb_pred( h, b, mb->mb_type );
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 )
{
if( NumSubMbPart( mb->sub_mb_type[ mbPartIdx ] ) > 1 )
{
noSubMbPartSizeLessThan8x8Flag = 0;
}
}
else if( !h->sps->direct_8x8_inference_flag )
{
noSubMbPartSizeLessThan8x8Flag = 0;
}
}
}
else
{
if( h->pps->transform_8x8_mode_flag && mb->mb_type == I_NxN )
{
if (cabac) { bs_write_ae(b, mb->transform_size_8x8_flag); }
else { bs_write_u(b, 1, mb->transform_size_8x8_flag); }
}
write_mb_pred( h, b, mb->mb_type );
}
if( MbPartPredMode( mb->mb_type, 0 ) != Intra_16x16 )
{
if (cabac) { bs_write_ae(b, mb->coded_block_pattern); }
else { bs_write_me(b, mb->coded_block_pattern); }
if( CodedBlockPatternLuma > 0 &&
h->pps->transform_8x8_mode_flag && mb->mb_type != I_NxN &&
noSubMbPartSizeLessThan8x8Flag &&
( mb->mb_type != B_Direct_16x16 || h->sps->direct_8x8_inference_flag ) )
{
if (cabac) { bs_write_ae(b, mb->transform_size_8x8_flag); }
else { bs_write_u(b, 1, mb->transform_size_8x8_flag); }
}
}
if( CodedBlockPatternLuma > 0 || CodedBlockPatternChroma > 0 ||
MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
if (cabac) { bs_write_ae(b, mb->mb_qp_delta); }
else { bs_write_se(b, mb->mb_qp_delta); }
write_residual( h, b );
}
}
}
//7.3.5.1 Macroblock prediction syntax
void write_mb_pred( h264_stream_t* h, bs_t* b, int mb_type )
{
macroblock_t* mb;
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_4x4 ||
MbPartPredMode( mb->mb_type, 0 ) == Intra_8x8 ||
MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_4x4 )
{
for( int luma4x4BlkIdx=0; luma4x4BlkIdx<16; luma4x4BlkIdx++ )
{
if (cabac) { bs_write_ae(b, mb->prev_intra4x4_pred_mode_flag[ luma4x4BlkIdx ]); }
else { bs_write_u(b, 1, mb->prev_intra4x4_pred_mode_flag[ luma4x4BlkIdx ]); }
if( !mb->prev_intra4x4_pred_mode_flag[ luma4x4BlkIdx ] )
{
if (cabac) { bs_write_ae(b, mb->rem_intra4x4_pred_mode[ luma4x4BlkIdx ]); }
else { bs_write_u(b, 3, mb->rem_intra4x4_pred_mode[ luma4x4BlkIdx ]); }
}
}
}
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_8x8 )
{
for( int luma8x8BlkIdx=0; luma8x8BlkIdx<4; luma8x8BlkIdx++ )
{
if (cabac) { bs_write_ae(b, mb->prev_intra8x8_pred_mode_flag[ luma8x8BlkIdx ]); }
else { bs_write_u(b, 1, mb->prev_intra8x8_pred_mode_flag[ luma8x8BlkIdx ]); }
if( !mb->prev_intra8x8_pred_mode_flag[ luma8x8BlkIdx ] )
{
if (cabac) { bs_write_ae(b, mb->rem_intra8x8_pred_mode[ luma8x8BlkIdx ]); }
else { bs_write_u(b, 3, mb->rem_intra8x8_pred_mode[ luma8x8BlkIdx ]); }
}
}
}
if( h->sps->chroma_format_idc != 0 )
{
if (cabac) { bs_write_ae(b, mb->intra_chroma_pred_mode); }
else { bs_write_ue(b, mb->intra_chroma_pred_mode); }
}
}
else if( MbPartPredMode( mb->mb_type, 0 ) != Direct )
{
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( ( h->pps->num_ref_idx_l0_active_minus1 > 0 ||
mb->mb_field_decoding_flag ) &&
MbPartPredMode( mb->mb_type, mbPartIdx ) != Pred_L1 )
{
if (cabac) { bs_write_ae(b, mb->ref_idx_l0[ mbPartIdx ]); }
else { bs_write_te(b, mb->ref_idx_l0[ mbPartIdx ]); }
}
}
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( ( h->pps->num_ref_idx_l1_active_minus1 > 0 ||
mb->mb_field_decoding_flag ) &&
MbPartPredMode( mb->mb_type, mbPartIdx ) != Pred_L0 )
{
if (cabac) { bs_write_ae(b, mb->ref_idx_l1[ mbPartIdx ]); }
else { bs_write_te(b, mb->ref_idx_l1[ mbPartIdx ]); }
}
}
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( MbPartPredMode ( mb->mb_type, mbPartIdx ) != Pred_L1 )
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { bs_write_ae(b, mb->mvd_l0[ mbPartIdx ][ 0 ][ compIdx ]); }
else { bs_write_se(b, mb->mvd_l0[ mbPartIdx ][ 0 ][ compIdx ]); }
}
}
}
for( int mbPartIdx = 0; mbPartIdx < NumMbPart( mb->mb_type ); mbPartIdx++)
{
if( MbPartPredMode( mb->mb_type, mbPartIdx ) != Pred_L0 )
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { bs_write_ae(b, mb->mvd_l1[ mbPartIdx ][ 0 ][ compIdx ]); }
else { bs_write_se(b, mb->mvd_l1[ mbPartIdx ][ 0 ][ compIdx ]); }
}
}
}
}
}
//7.3.5.2 Sub-macroblock prediction syntax
void write_sub_mb_pred( h264_stream_t* h, bs_t* b, int mb_type )
{
macroblock_t* mb;
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if (cabac) { bs_write_ae(b, mb->sub_mb_type[ mbPartIdx ]); }
else { bs_write_ue(b, mb->sub_mb_type[ mbPartIdx ]); }
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( ( h->pps->num_ref_idx_l0_active_minus1 > 0 || mb->mb_field_decoding_flag ) &&
mb->mb_type != P_8x8ref0 &&
mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L1 )
{
if (cabac) { bs_write_ae(b, mb->ref_idx_l0[ mbPartIdx ]); }
else { bs_write_te(b, mb->ref_idx_l0[ mbPartIdx ]); }
}
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( (h->pps->num_ref_idx_l1_active_minus1 > 0 || mb->mb_field_decoding_flag ) &&
mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L0 )
{
if (cabac) { bs_write_ae(b, mb->ref_idx_l1[ mbPartIdx ]); }
else { bs_write_te(b, mb->ref_idx_l1[ mbPartIdx ]); }
}
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L1 )
{
for( int subMbPartIdx = 0;
subMbPartIdx < NumSubMbPart( mb->sub_mb_type[ mbPartIdx ] );
subMbPartIdx++)
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { bs_write_ae(b, mb->mvd_l0[ mbPartIdx ][ subMbPartIdx ][ compIdx ]); }
else { bs_write_se(b, mb->mvd_l0[ mbPartIdx ][ subMbPartIdx ][ compIdx ]); }
}
}
}
}
for( int mbPartIdx = 0; mbPartIdx < 4; mbPartIdx++ )
{
if( mb->sub_mb_type[ mbPartIdx ] != B_Direct_8x8 &&
SubMbPredMode( mb->sub_mb_type[ mbPartIdx ] ) != Pred_L0 )
{
for( int subMbPartIdx = 0;
subMbPartIdx < NumSubMbPart( mb->sub_mb_type[ mbPartIdx ] );
subMbPartIdx++)
{
for( int compIdx = 0; compIdx < 2; compIdx++ )
{
if (cabac) { bs_write_ae(b, mb->mvd_l1[ mbPartIdx ][ subMbPartIdx ][ compIdx ]); }
else { bs_write_se(b, mb->mvd_l1[ mbPartIdx ][ subMbPartIdx ][ compIdx ]); }
}
}
}
}
}
//7.3.5.3 Residual data syntax
void write_residual( h264_stream_t* h, bs_t* b )
{
macroblock_t* mb;
/*
if( !h->pps->entropy_coding_mode_flag )
{
residual_block = residual_block_cavlc;
}
else
{
residual_block = residual_block_cabac;
}
*/
// FIXME
#define read_residual_block read_residual_block_cavlc
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
write_residual_block( b, mb->Intra16x16DCLevel, 16 );
}
for( int i8x8 = 0; i8x8 < 4; i8x8++ ) // each luma 8x8 block
{
if( !mb->transform_size_8x8_flag || !h->pps->entropy_coding_mode_flag )
{
for( int i4x4 = 0; i4x4 < 4; i4x4++ ) // each 4x4 sub-block of block
{
if( CodedBlockPatternLuma & ( 1 << i8x8 ) )
{
if( MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
write_residual_block( b, mb->Intra16x16ACLevel[ i8x8 * 4 + i4x4 ], 15 );
}
else
{
write_residual_block( b, mb->LumaLevel[ i8x8 * 4 + i4x4 ], 16 );
}
}
else if( MbPartPredMode( mb->mb_type, 0 ) == Intra_16x16 )
{
for( int i = 0; i < 15; i++ )
{
mb->Intra16x16ACLevel[ i8x8 * 4 + i4x4 ][ i ] = 0;
}
}
else
{
for( int i = 0; i < 16; i++ )
{
mb->LumaLevel[ i8x8 * 4 + i4x4 ][ i ] = 0;
}
}