Fix various typos and incorrect comments

Signed-off-by: Paul Jones <[email protected]>

common/context.h

@@ -2,8 +2,7 @@
 
  OpenPnp-Capture: a video capture subsystem.
 
- Platform independent context class to keep track
- of the global state.
+ Platform independent context class to keep track of the global state.
 
  Copyright (c) 2017 Jason von Nieda, Niels Moseley.
 

common/libmain.cpp

@@ -2,7 +2,7 @@
 
  OpenPnp-Capture: a video capture subsystem.
 
- Windows platform code
+ Platform independent library entry.
 
  Copyright (c) 2017 Jason von Nieda, Niels Moseley.
 

common/logging.cpp

@@ -28,7 +28,7 @@
 #include <stdarg.h>
 #include "logging.h"
 
-/* In their infinite "wisdom" Microsoft have declared snprintf deprecated
+/* In their infinite "wisdom" Microsoft have declared snprintf is deprecated
  and we must therefore resort to a macro to fix something that shouldn't
  be a problem */
 #ifdef _MSC_VER

linux/mjpeghelper.cpp

@@ -16,7 +16,7 @@ bool MJPEGHelper::decompressFrame(const uint8_t *inBuffer,
  size_t inBytes, uint8_t *outBuffer,
  uint32_t outBufWidth, uint32_t outBufHeight)
 {
- // note: the jpeg-turbo library apparently uses non-const
+ // note: the jpeg-turbo library apparently uses a non-const
  // buffer pointer to the incoming JPEG data.
  // Hopefully, the lib does not change the JPEG data buffer.
  // so, for now, we'll cast it to a non-const pointer.
@@ -39,7 +39,7 @@ bool MJPEGHelper::decompressFrame(const uint8_t *inBuffer,
  if (tjDecompress2(m_decompressHandle, jpegPtr, inBytes, outBuffer, 
  width, 0/*pitch*/, height, TJPF_RGB, TJFLAG_FASTDCT) != 0)
  {
- // A lot of cameras produce incorrect but decoding JPEG data
+ // A lot of cameras produce incorrect but decodable JPEG data
  // and produce warnings that fill the console,
  // such as 'extraneous bytes before marker' etc.
  //

linux/platformcontext.h

@@ -50,9 +50,6 @@ class PlatformContext : public Context
 
  /** Enumerate V4L capture devices and put their 
  information into the m_devices array 
- 
- Implement this function in a platform-dependent
- derived class.
  */
  virtual bool enumerateDevices();
 

linux/platformstream.cpp

@@ -314,7 +314,7 @@ void captureThreadFunctionAsync(PlatformStream *stream, int fd, size_t bufferSiz
  } // while 
 
  // Note: the destruction of the PlatformHelper 
- // by the scoped pointer will automaticall
+ // by the scoped pointer will automatically
  // turn off streaming and remove the
  // memory mapped buffers from the system.
  LOG(LOG_DEBUG, "captureThreadFunctionAsync exited\n");

mac/platformcontext.h

@@ -13,7 +13,7 @@ class PlatformContext : public Context
 {
 public:
  /** Create a context for the library.
- Device enumeration is perform in the constructor,
+ Device enumeration is performed in the constructor,
  so all devices must be present in the system when
  the Context is created or devices will not be found.
 
@@ -23,11 +23,8 @@ class PlatformContext : public Context
  virtual ~PlatformContext();
 
 protected:
- /** Enumerate V4L capture devices and put their 
+ /** Enumerate AVCaptureDevices and put their 
  information into the m_devices array 
- 
- Implement this function in a platform-dependent
- derived class.
  */
  virtual bool enumerateDevices();
 

mac/platformcontext.mm

@@ -3,7 +3,6 @@
 #include "platformcontext.h"
 #import <AVFoundation/AVFoundation.h>
 
-
 // a platform factory function needed by
 // libmain.cpp
 Context* createPlatformContext()
@@ -53,7 +52,7 @@
 
  LOG(LOG_DEBUG, "USB : vid=%04X pid=%04X\n", deviceInfo->m_vid, deviceInfo->m_pid);
 
- // he unique ID seem to be comprised of a 10-character PCI/USB location address
+ // the unique ID seem to be comprised of a 10-character PCI/USB location address
  // followed by the VID and PID in hex, e.g. 0x26210000046d0825
  deviceInfo->m_busLocation = 0;
  if (device.uniqueID.length == 18)

mac/platformstream.h

@@ -25,7 +25,7 @@
 
 #include "uvcctrl.h"
 
-class Context;  // pre-declaration
+class Context; // pre-declaration
 class PlatformStream; // pre-declaration
 
 /** An OBJC++ interface to handle callbacks from the

win/platformcontext.h

@@ -32,7 +32,7 @@ class PlatformContext : public Context
 {
 public:
  /** Create a context for the library.
- Device enumeration is perform in the constructor,
+ Device enumeration is performed in the constructor,
  so all devices must be present in the system when
  the Context is created or devices will not be found.
 

win/platformstream.h

@@ -27,7 +27,7 @@
 #include "samplegrabber.h"
 
 
-class Context;  // pre-declaration
+class Context; // pre-declaration
 class PlatformStream; // pre-declaration
 
 /** A class to handle callbacks from the video subsystem,