mp4.cpp

AAC编解码源码

		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetTrackTimeScale(
	MP4FileHandle hFile, MP4TrackId trackId, u_int32_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackTimeScale(trackId, value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}


// This function should not be used anymore  
// use MP4GetTrackEsdsObjectTypeId instead 
extern "C" u_int8_t MP4GetTrackAudioType(
     MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
		  
		  return ((MP4File*)hFile)->GetTrackAudioType(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_AUDIO_TYPE;
}

extern "C" u_int8_t MP4GetTrackAudioMpeg4Type(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackAudioMpeg4Type(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_MPEG4_INVALID_AUDIO_TYPE;
}


// This function should not be used anymore  
// use MP4GetTrackEsdsObjectTypeId instead 
extern "C" u_int8_t MP4GetTrackVideoType(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackVideoType(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_VIDEO_TYPE;
}

// Replacement to MP4GetTrackVideoType and MP4GetTrackAudioType
// Basically does the same thing but with a more self-explanatory name
extern "C" u_int8_t MP4GetTrackEsdsObjectTypeId(
     MP4FileHandle hFile, MP4TrackId trackId)
{
  if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
    try {
      
      return ((MP4File*)hFile)->GetTrackEsdsObjectTypeId(trackId);
    }
    catch (MP4Error* e) {
      PRINT_ERROR(e);
      delete e;
    }
  }
  return MP4_INVALID_AUDIO_TYPE;
}

extern "C" MP4Duration MP4GetTrackFixedSampleDuration(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackFixedSampleDuration(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" u_int32_t MP4GetTrackBitRate(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackIntegerProperty(trackId,
				"mdia.minf.stbl.stsd.*.esds.decConfigDescr.avgBitrate");
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4GetTrackESConfiguration(
	MP4FileHandle hFile, MP4TrackId trackId, 
	u_int8_t** ppConfig, u_int32_t* pConfigSize)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->GetTrackESConfiguration(
				trackId, ppConfig, pConfigSize);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	*ppConfig = NULL;
	*pConfigSize = 0;
	return false;
}

extern "C" bool MP4SetTrackESConfiguration(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const u_int8_t* pConfig, u_int32_t configSize)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackESConfiguration(
				trackId, pConfig, configSize);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" MP4SampleId MP4GetTrackNumberOfSamples(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackNumberOfSamples(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" u_int16_t MP4GetTrackVideoWidth(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
		       return ((MP4File*)hFile)->GetTrackIntegerProperty(trackId,
				"mdia.minf.stbl.stsd.*.width");
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" u_int16_t MP4GetTrackVideoHeight(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackIntegerProperty(trackId,
				"mdia.minf.stbl.stsd.*.height");
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" float MP4GetTrackVideoFrameRate(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackVideoFrameRate(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0.0;
}

/* generic track properties */

extern "C" u_int64_t MP4GetTrackIntegerProperty(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const char* propName)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackIntegerProperty(trackId, 
				propName);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return (u_int64_t)-1;
}

extern "C" float MP4GetTrackFloatProperty(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const char* propName)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackFloatProperty(trackId, propName);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return NAN;
}

extern "C" const char* MP4GetTrackStringProperty(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const char* propName)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackStringProperty(trackId, propName);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return NULL;
}

extern "C" void MP4GetTrackBytesProperty(
	MP4FileHandle hFile, MP4TrackId trackId, const char* propName, 
	u_int8_t** ppValue, u_int32_t* pValueSize)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->GetTrackBytesProperty(
				trackId, propName, ppValue, pValueSize);
			return;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	*ppValue = NULL;
	*pValueSize = 0;
	return;
}

extern "C" bool MP4SetTrackIntegerProperty(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const char* propName, int64_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackIntegerProperty(trackId, 
				propName, value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4SetTrackFloatProperty(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const char* propName, float value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackFloatProperty(trackId, propName, value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4SetTrackStringProperty(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const char* propName, const char* value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackStringProperty(trackId, propName, value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4SetTrackBytesProperty(
	MP4FileHandle hFile, MP4TrackId trackId, 
	const char* propName, const u_int8_t* pValue, u_int32_t valueSize)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackBytesProperty(
				trackId, propName, pValue, valueSize);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

/* sample operations */

extern "C" bool MP4ReadSample(
	/* input parameters */
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4SampleId sampleId,
	/* output parameters */
	u_int8_t** ppBytes, 
	u_int32_t* pNumBytes, 
	MP4Timestamp* pStartTime, 
	MP4Duration* pDuration,
	MP4Duration* pRenderingOffset, 
	bool* pIsSyncSample)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->ReadSample(
				trackId, 
				sampleId, 
				ppBytes, 
				pNumBytes, 
				pStartTime, 
				pDuration, 
				pRenderingOffset, 
				pIsSyncSample);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	*pNumBytes = 0;
	return false;
}

extern "C" bool MP4ReadSampleFromTime(
	/* input parameters */
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4Timestamp when,
	/* output parameters */
	u_int8_t** ppBytes, 
	u_int32_t* pNumBytes, 
	MP4Timestamp* pStartTime, 
	MP4Duration* pDuration,
	MP4Duration* pRenderingOffset, 
	bool* pIsSyncSample)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			MP4SampleId sampleId = 
				((MP4File*)hFile)->GetSampleIdFromTime(
					trackId, when, false);

			((MP4File*)hFile)->ReadSample(
				trackId, 
				sampleId, 
				ppBytes, 
				pNumBytes, 
				pStartTime, 
				pDuration, 
				pRenderingOffset, 
				pIsSyncSample);

			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	*pNumBytes = 0;
	return false;
}

extern "C" bool MP4WriteSample(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	const u_int8_t* pBytes, 
	u_int32_t numBytes,
	MP4Duration duration,
	MP4Duration renderingOffset, 
	bool isSyncSample)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->WriteSample(
				trackId, 
				pBytes, 
				numBytes, 
				duration, 
				renderingOffset, 
				isSyncSample);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4CopySample(
	MP4FileHandle srcFile,
	MP4TrackId srcTrackId, 
	MP4SampleId srcSampleId,
	MP4FileHandle dstFile,
	MP4TrackId dstTrackId,
	MP4Duration dstSampleDuration)
{
	bool rc;
	u_int8_t* pBytes = NULL; 
	u_int32_t numBytes = 0;
	MP4Duration sampleDuration;
	MP4Duration renderingOffset;
	bool isSyncSample;

	// Note: we leave it up to the caller to ensure that the
	// source and destination tracks are compatible.
	// i.e. copying audio samples into a video track 
	// is unlikely to do anything useful

	rc = MP4ReadSample(
		srcFile,
		srcTrackId,
		srcSampleId,
		&pBytes,
		&numBytes,
		NULL,
		&sampleDuration,
		&renderingOffset,
		&isSyncSample);

	if (!rc) {
		return false;
	}

	if (dstFile == MP4_INVALID_FILE_HANDLE) {
		dstFile = srcFile;
	}
	if (dstTrackId == MP4_INVALID_TRACK_ID) {
		dstTrackId = srcTrackId;
	}
	if (dstSampleDuration != MP4_INVALID_DURATION) {
		sampleDuration = dstSampleDuration;
	}

	rc = MP4WriteSample(
		dstFile,
		dstTrackId,
		pBytes,
		numBytes,
		sampleDuration,
		renderingOffset,		
		isSyncSample);

	free(pBytes);

	return rc;
}

extern "C" bool MP4ReferenceSample(
	MP4FileHandle srcFile,
	MP4TrackId srcTrackId, 
	MP4SampleId srcSampleId,
	MP4FileHandle dstFile,
	MP4TrackId dstTrackId,
	MP4Duration dstSampleDuration)
{
	// LATER Not yet implemented
	return false;
}

extern "C" u_int32_t MP4GetSampleSize(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4SampleId sampleId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSampleSize(
				trackId, sampleId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" u_int32_t MP4GetTrackMaxSampleSize(
	MP4FileHandle hFile,
	MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackMaxSampleSize(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" MP4SampleId MP4GetSampleIdFromTime(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4Timestamp when, 
	bool wantSyncSample)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSampleIdFromTime(
				trackId, when, wantSyncSample);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_SAMPLE_ID;
}

extern "C" MP4Timestamp MP4GetSampleTime(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4SampleId sampleId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSampleTime(
				trackId, sampleId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TIMESTAMP;
}

extern "C" MP4Duration MP4GetSampleDuration(