avireadhandler.cpp

VC++视频开发实例集锦(包括“远程视频监控”"语音识别系统"等13个经典例子)

//	VirtualDub - Video processing and capture application
//	Copyright (C) 1998-2001 Avery Lee
//
//	This program is free software; you can redistribute it and/or modify
//	it under the terms of the GNU General Public License as published by
//	the Free Software Foundation; either version 2 of the License, or
//	(at your option) any later version.
//
//	This program 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 General Public License for more details.
//
//	You should have received a copy of the GNU General Public License
//	along with this program; if not, write to the Free Software
//	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

#include <crtdbg.h>

#include <windows.h>

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

//#define STREAMING_DEBUG

// HACK!!!!

CRITICAL_SECTION g_diskcs;
bool g_disklockinited=false;


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

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##