avireadhandler.cpp

avisynth-source-0.3.zip,avi edit src

#include <crtdbg.h>

#include <windows.h>

#include "AVIReadHandler.h"
//#include "FastReadStream.h"
#include "AVIIndex.h"
#include "Error.h"
#include "List.h"
#include "Fixes.h"
#include "File64.h"


// These two functions translate VirtualDub exceptions to Avisynth exceptions.

FilterChainError MyError(const char* fmt, ...) {
  static char buf[256];
  va_list val;
  va_start(val, fmt);
  wvsprintf(buf, fmt, val);
  va_end(val);
  return FilterChainError(buf);
}

FilterChainError MyWin32Error(const char *format, DWORD err, ...) {
  char szError[128];
  char szTemp[256];

  FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
    0, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), szError, sizeof szError, NULL);

  if (szError[0]) {
    long l = strlen(szError);
    if (l>1 && szError[l-2] == '\r')
      szError[l-2] = 0;
    else if (szError[l-1] == '\n')
      szError[l-1] = 0;
  }

  va_list val;
  va_start(val, err);
  wvsprintf(szTemp, format, val);
  va_end(val);

  return FilterChainError(Sprintf(szTemp, szError));
}



//#define STREAMING_DEBUG

// HACK!!!!

CRITICAL_SECTION g_diskcs;
bool g_disklockinited=false;


#pragma warning(disable: 4200)    // zero-sized array in struct/union
#pragma warning(disable: 4244)    // conversion from __int64, possible loss of data


///////////////////////////////////////////

typedef __int64 QUADWORD;

// The following comes from the OpenDML 1.0 spec for extended AVI files

// bIndexType codes
//
#define AVI_INDEX_OF_INDEXES 0x00	// when each entry in aIndex
									// array points to an index chunk

#define AVI_INDEX_OF_CHUNKS 0x01	// when each entry in aIndex
									// array points to a chunk in the file

#define AVI_INDEX_IS_DATA	0x80	// when each entry is aIndex is
									// really the data

// bIndexSubtype codes for INDEX_OF_CHUNKS

#define AVI_INDEX_2FIELD	0x01	// when fields within frames
									// are also indexed
	struct _avisuperindex_entry {
		QUADWORD qwOffset;		// absolute file offset, offset 0 is
								// unused entry??
		DWORD dwSize;			// size of index chunk at this offset
		DWORD dwDuration;		// time span in stream ticks
	};
	struct _avistdindex_entry {
		DWORD dwOffset;			// qwBaseOffset + this is absolute file offset
		DWORD dwSize;			// bit 31 is set if this is NOT a keyframe
	};
	struct _avifieldindex_entry {
		DWORD	dwOffset;
		DWORD	dwSize;
		DWORD	dwOffsetField2;
	};

#pragma pack(push)
#pragma pack(2)

typedef struct _avisuperindex_chunk {
	FOURCC fcc;					// 抜x##