mp4.cpp

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	*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 MP4EncAndCopySample(
	MP4FileHandle srcFile,
	MP4TrackId srcTrackId, 
	MP4SampleId srcSampleId,
        encryptFunc_t encfcnp,
        u_int32_t encfcnparam1,
	MP4FileHandle dstFile,
	MP4TrackId dstTrackId,
	MP4Duration dstSampleDuration)
{
	bool rc;
	u_int8_t* pBytes = NULL; 
	u_int32_t numBytes = 0;
	u_int8_t* encSampleData = NULL;
	u_int32_t encSampleLength = 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;
	}

        //if (ismacrypEncryptSampleAddHeader(ismaCryptSId, numBytes, pBytes,
        //                        &encSampleLength, &encSampleData) != 0) {
        if (encfcnp(encfcnparam1, numBytes, pBytes,
				&encSampleLength, &encSampleData) != 0) {
		fprintf(stderr,
			"Can't encrypt the sample and add its header %u\n",
			srcSampleId);
	}	

	rc = MP4WriteSample(
		dstFile,
                dstTrackId,
                encSampleData,
                encSampleLength,
                sampleDuration,
                renderingOffset,
                isSyncSample);
		
	free(pBytes);

	if (encSampleData != NULL) {
	          free(encSampleData);
        }
	
	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(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4SampleId sampleId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSampleDuration(
				trackId, sampleId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" MP4Duration MP4GetSampleRenderingOffset(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4SampleId sampleId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSampleRenderingOffset(
				trackId, sampleId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" bool MP4SetSampleRenderingOffset(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4SampleId sampleId,
	MP4Duration renderingOffset)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetSampleRenderingOffset(
				trackId, sampleId, renderingOffset);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" int8_t MP4GetSampleSync(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4SampleId sampleId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSampleSync(
				trackId, sampleId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return -1;
}


extern "C" u_int64_t MP4ConvertFromMovieDuration(
	MP4FileHandle hFile,
	MP4Duration duration,
	u_int32_t timeScale)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->ConvertFromMovieDuration(
				duration, timeScale);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return (u_int64_t)MP4_INVALID_DURATION;
}

extern "C" u_int64_t MP4ConvertFromTrackTimestamp(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4Timestamp timeStamp,
	u_int32_t timeScale)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->ConvertFromTrackTimestamp(
				trackId, timeStamp, timeScale);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return (u_int64_t)MP4_INVALID_TIMESTAMP;
}

extern "C" MP4Timestamp MP4ConvertToTrackTimestamp(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	u_int64_t timeStamp,
	u_int32_t timeScale)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->ConvertToTrackTimestamp(
				trackId, timeStamp, timeScale);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TIMESTAMP;
}

extern "C" u_int64_t MP4ConvertFromTrackDuration(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4Duration duration,
	u_int32_t timeScale)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->ConvertFromTrackDuration(
				trackId, duration, timeScale);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return (u_int64_t)MP4_INVALID_DURATION;
}

extern "C" MP4Duration MP4ConvertToTrackDuration(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	u_int64_t duration,
	u_int32_t timeScale)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->ConvertToTrackDuration(
				trackId, duration, timeScale);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" bool MP4GetHintTrackRtpPayload(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	char** ppPayloadName,
	u_int8_t* pPayloadNumber,
	u_int16_t* pMaxPayloadSize,
	char **ppEncodingParams)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->GetHintTrackRtpPayload(
				hintTrackId, ppPayloadName, pPayloadNumber, pMaxPayloadSize,
				ppEncodingParams);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4SetHintTrackRtpPayload(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	const char* pPayloadName,
	u_int8_t* pPayloadNumber,
	u_int16_t maxPayloadSize,
	const char *encode_params,
	bool include_rtp_map,
	bool include_mpeg4_esid)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetHintTrackRtpPayload(
				hintTrackId, pPayloadName, pPayloadNumber, maxPayloadSize, encode_params,
				include_rtp_map, include_mpeg4_esid);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" const char* MP4GetSessionSdp(
	MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSessionSdp();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return NULL;
}

extern "C" bool MP4SetSessionSdp(
	MP4FileHandle hFile,
	const char* sdpString)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetSessionSdp(sdpString);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4AppendSessionSdp(
	MP4FileHandle hFile,
	const char* sdpString)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->AppendSessionSdp(sdpString);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" const char* MP4GetHintTrackSdp(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetHintTrackSdp(hintTrackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return NULL;
}

extern "C" bool MP4SetHintTrackSdp(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	const char* sdpString)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetHintTrackSdp(hintTrackId, sdpString);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4AppendHintTrackSdp(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	const char* sdpString)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->AppendHintTrackSdp(hintTrackId, sdpString);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" MP4TrackId MP4GetHintTrackReferenceTrackId(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->
				GetHintTrackReferenceTrackId(hintTrackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" bool MP4ReadRtpHint(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	MP4SampleId hintSampleId,
	u_int16_t* pNumPackets)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->ReadRtpHint(
				hintTrackId, hintSampleId, pNumPackets);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int16_t MP4GetRtpHintNumberOfPackets(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
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mp4.cpp - 源码说明

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