shithub: aacdec

ref: 4dfc6c8fa70d3109591a1f51cf0d8a7849aeb4dd
dir: /common/mp4v2/mp4.cpp/

/*
 * The contents of this file are subject to the Mozilla Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 * 
 * The Original Code is MPEG4IP.
 * 
 * The Initial Developer of the Original Code is Cisco Systems Inc.
 * Portions created by Cisco Systems Inc. are
 * Copyright (C) Cisco Systems Inc. 2001.  All Rights Reserved.
 * 
 * Contributor(s): 
 *		Dave Mackie		[email protected]
 */

/* 
 * MP4 library API functions
 * 
 * These are wrapper functions that provide C linkage conventions
 * to the library, and catch any internal errors, ensuring that
 * a proper return value is given.
 */

#include "mp4common.h"

#define PRINT_ERROR(e) \
	VERBOSE_ERROR(((MP4File*)hFile)->GetVerbosity(), e->Print());

/* file operations */

extern "C" MP4FileHandle MP4Read(const char* fileName, u_int32_t verbosity)
{
	MP4File* pFile = NULL;
	try {
		pFile = new MP4File(verbosity);
		pFile->Read(fileName);
		return (MP4FileHandle)pFile;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
		delete pFile;
		return MP4_INVALID_FILE_HANDLE;
	}
}

#ifdef USE_FILE_CALLBACKS
extern "C" MP4FileHandle MP4ReadCb(u_int32_t verbosity,
                                   MP4OpenCallback MP4fopen,
                                   MP4CloseCallback MP4fclose,
                                   MP4ReadCallback MP4fread,
                                   MP4WriteCallback MP4fwrite,
                                   MP4SetposCallback MP4fsetpos,
                                   MP4GetposCallback MP4fgetpos,
                                   MP4FilesizeCallback MP4filesize,
                                   void *userData
                                   )
{
	MP4File* pFile = NULL;
	try {
		pFile = new MP4File(verbosity);

        // Set user data and callbacks
        pFile->m_userData = userData;
        pFile->m_MP4fopen = MP4fopen;
        pFile->m_MP4fclose = MP4fclose;
        pFile->m_MP4fread = MP4fread;
        pFile->m_MP4fwrite = MP4fwrite;
        pFile->m_MP4fsetpos = MP4fsetpos;
        pFile->m_MP4fgetpos = MP4fgetpos;
        pFile->m_MP4filesize = MP4filesize;

		pFile->Read("");
		return (MP4FileHandle)pFile;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
		delete pFile;
		return MP4_INVALID_FILE_HANDLE;
	}
}

extern "C" MP4FileHandle MP4ModifyCb(int32_t verbosity,
    bool useExtensibleFormat,
    MP4OpenCallback MP4fopen, MP4CloseCallback MP4fclose,
    MP4ReadCallback MP4fread, MP4WriteCallback MP4fwrite,
    MP4SetposCallback MP4fsetpos, MP4GetposCallback MP4fgetpos,
    MP4FilesizeCallback MP4filesize, void *userData)
{
	MP4File* pFile = NULL;
	try {
		pFile = new MP4File(verbosity);

        // Set user data and callbacks
        pFile->m_userData = userData;
        pFile->m_MP4fopen = MP4fopen;
        pFile->m_MP4fclose = MP4fclose;
        pFile->m_MP4fread = MP4fread;
        pFile->m_MP4fwrite = MP4fwrite;
        pFile->m_MP4fsetpos = MP4fsetpos;
        pFile->m_MP4fgetpos = MP4fgetpos;
        pFile->m_MP4filesize = MP4filesize;

		// LATER useExtensibleFormat, moov first, then mvex's
		pFile->Modify("");
		return (MP4FileHandle)pFile;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
		delete pFile;
		return MP4_INVALID_FILE_HANDLE;
	}
}
#endif

extern "C" MP4FileHandle MP4Create(const char* fileName, 
	u_int32_t verbosity, bool use64bits, bool useExtensibleFormat)
{
	MP4File* pFile = NULL;
	try {
		pFile = new MP4File(verbosity);
		// LATER useExtensibleFormat, moov first, then mvex's
		pFile->Create(fileName, use64bits);
		return (MP4FileHandle)pFile;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
		delete pFile;
		return MP4_INVALID_FILE_HANDLE;
	}
}

extern "C" MP4FileHandle MP4Modify(const char* fileName, 
	u_int32_t verbosity, bool useExtensibleFormat)
{
	MP4File* pFile = NULL;
	try {
		pFile = new MP4File(verbosity);
		// LATER useExtensibleFormat, moov first, then mvex's
		pFile->Modify(fileName);
		return (MP4FileHandle)pFile;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
		delete pFile;
		return MP4_INVALID_FILE_HANDLE;
	}
}

extern "C" bool MP4Optimize(const char* existingFileName, 
	const char* newFileName, 
	u_int32_t verbosity)
{
	try {
		MP4File* pFile = new MP4File(verbosity);
		pFile->Optimize(existingFileName, newFileName);
		delete pFile;
		return true;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
	}
	return false;
}

extern "C" bool MP4Close(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->Close();
			delete (MP4File*)hFile;
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4Dump(
	MP4FileHandle hFile, 
	FILE* pDumpFile, 
	bool dumpImplicits)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->Dump(pDumpFile, dumpImplicits);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}


/* specific file properties */

extern "C" u_int32_t MP4GetVerbosity(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetVerbosity();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetVerbosity(MP4FileHandle hFile, u_int32_t verbosity)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetVerbosity(verbosity);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" MP4Duration MP4GetDuration(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetDuration();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" u_int32_t MP4GetTimeScale(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTimeScale();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetTimeScale(MP4FileHandle hFile, u_int32_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTimeScale(value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int8_t MP4GetODProfileLevel(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetODProfileLevel();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetODProfileLevel(MP4FileHandle hFile, u_int8_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetODProfileLevel(value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int8_t MP4GetSceneProfileLevel(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSceneProfileLevel();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetSceneProfileLevel(MP4FileHandle hFile, u_int8_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetSceneProfileLevel(value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int8_t MP4GetVideoProfileLevel(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetVideoProfileLevel();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetVideoProfileLevel(MP4FileHandle hFile, u_int8_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetVideoProfileLevel(value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int8_t MP4GetAudioProfileLevel(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetAudioProfileLevel();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetAudioProfileLevel(MP4FileHandle hFile, u_int8_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetAudioProfileLevel(value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int8_t MP4GetGraphicsProfileLevel(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetGraphicsProfileLevel();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4SetGraphicsProfileLevel(MP4FileHandle hFile, u_int8_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetGraphicsProfileLevel(value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

/* generic file properties */

extern "C" u_int64_t MP4GetIntegerProperty(
	MP4FileHandle hFile, const char* propName)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetIntegerProperty(propName);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return (u_int64_t)-1;
}

extern "C" float MP4GetFloatProperty(
	MP4FileHandle hFile, const char* propName)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetFloatProperty(propName);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return NAN;
}

extern "C" const char* MP4GetStringProperty(
	MP4FileHandle hFile, const char* propName)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetStringProperty(propName);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return NULL;
}

extern "C" void MP4GetBytesProperty(
	MP4FileHandle hFile, const char* propName, 
	u_int8_t** ppValue, u_int32_t* pValueSize)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->GetBytesProperty(propName, ppValue, pValueSize);
			return;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	*ppValue = NULL;
	*pValueSize = 0;
	return;
}

extern "C" bool MP4SetIntegerProperty(
	MP4FileHandle hFile, const char* propName, int64_t value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetIntegerProperty(propName, value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4SetFloatProperty(
	MP4FileHandle hFile, const char* propName, float value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetFloatProperty(propName, value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4SetStringProperty(
	MP4FileHandle hFile, const char* propName, const char* value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetStringProperty(propName, value);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4SetBytesProperty(
	MP4FileHandle hFile, const char* propName, 
	const u_int8_t* pValue, u_int32_t valueSize)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetBytesProperty(propName, pValue, valueSize);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

/* track operations */

extern "C" MP4TrackId MP4AddTrack(
	MP4FileHandle hFile, const char* type)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->AddSystemsTrack(type);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" MP4TrackId MP4AddSystemsTrack(
	MP4FileHandle hFile, const char* type)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->AddSystemsTrack(type);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" MP4TrackId MP4AddODTrack(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->AddODTrack();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" MP4TrackId MP4AddSceneTrack(MP4FileHandle hFile)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->AddSceneTrack();
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" MP4TrackId MP4AddAudioTrack(
	MP4FileHandle hFile, 
	u_int32_t timeScale, 
	MP4Duration sampleDuration, 
	u_int8_t audioType)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->
				AddAudioTrack(timeScale, sampleDuration, audioType);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" MP4TrackId MP4AddVideoTrack(
	MP4FileHandle hFile, 
	u_int32_t timeScale, 
	MP4Duration sampleDuration,
	u_int16_t width, 
	u_int16_t height, 
	u_int8_t videoType)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->AddVideoTrack(
				timeScale, sampleDuration, width, height, videoType);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" MP4TrackId MP4AddHintTrack(
	MP4FileHandle hFile, MP4TrackId refTrackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->AddHintTrack(refTrackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" MP4TrackId MP4CloneTrack(
	MP4FileHandle srcFile, 
	MP4TrackId srcTrackId,
	MP4FileHandle dstFile)
{
	MP4TrackId dstTrackId = MP4_INVALID_TRACK_ID;

	if (dstFile == NULL) {
		dstFile = srcFile;
	}

	const char* trackType = 
		MP4GetTrackType(srcFile, srcTrackId);

	if (!trackType) {
		return dstTrackId;
	}

	if (MP4_IS_VIDEO_TRACK_TYPE(trackType)) {
		dstTrackId = MP4AddVideoTrack(
			dstFile,
			MP4GetTrackTimeScale(srcFile, srcTrackId),
			MP4GetTrackFixedSampleDuration(srcFile, srcTrackId),
			MP4GetTrackVideoWidth(srcFile, srcTrackId),
			MP4GetTrackVideoHeight(srcFile, srcTrackId),
			MP4GetTrackVideoType(srcFile, srcTrackId));

	} else if (MP4_IS_AUDIO_TRACK_TYPE(trackType)) {
		dstTrackId = MP4AddAudioTrack(
			dstFile,
			MP4GetTrackTimeScale(srcFile, srcTrackId),
			MP4GetTrackFixedSampleDuration(srcFile, srcTrackId),
			MP4GetTrackAudioType(srcFile, srcTrackId));

	} else if (MP4_IS_OD_TRACK_TYPE(trackType)) {
		dstTrackId = MP4AddODTrack(dstFile);

	} else if (MP4_IS_SCENE_TRACK_TYPE(trackType)) {
		dstTrackId = MP4AddSceneTrack(dstFile);

	} else if (MP4_IS_HINT_TRACK_TYPE(trackType)) {
		dstTrackId = MP4AddHintTrack(
			dstFile,
			MP4GetHintTrackReferenceTrackId(srcFile, srcTrackId));

	} else if (MP4_IS_SYSTEMS_TRACK_TYPE(trackType)) {
		dstTrackId = MP4AddSystemsTrack(dstFile, trackType);

	} else {
		dstTrackId = MP4AddTrack(dstFile, trackType);
	}

	if (dstTrackId == MP4_INVALID_TRACK_ID) {
		return dstTrackId;
	}

	MP4SetTrackTimeScale(
		dstFile, 
		dstTrackId,
		MP4GetTrackTimeScale(srcFile, srcTrackId));

	// copy track ES configuration
	u_int8_t* pConfig = NULL;
	u_int32_t configSize = 0;

	MP4GetTrackESConfiguration(
		srcFile, 
		srcTrackId,
		&pConfig,
		&configSize);

	MP4SetTrackESConfiguration(
		dstFile, 
		dstTrackId,
		pConfig,
		configSize);

		free(pConfig);

	if (MP4_IS_HINT_TRACK_TYPE(trackType)) {
		// probably not exactly what is wanted
		// but caller can adjust later to fit their desires

		char* payloadName = NULL;
		char *encodingParms = NULL;
		u_int8_t payloadNumber;
		u_int16_t maxPayloadSize;

		MP4GetHintTrackRtpPayload(
			srcFile,
			srcTrackId,
			&payloadName,
			&payloadNumber,
			&maxPayloadSize,
			&encodingParms);

		MP4SetHintTrackRtpPayload(
			dstFile,
			dstTrackId,
			payloadName,
			&payloadNumber,
			maxPayloadSize,
			encodingParms);

		MP4SetHintTrackSdp(
			dstFile,
			dstTrackId,
			MP4GetHintTrackSdp(srcFile, srcTrackId));
	}

	return dstTrackId;
}

extern "C" MP4TrackId MP4CopyTrack(
	MP4FileHandle srcFile, 
	MP4TrackId srcTrackId,
	MP4FileHandle dstFile, 
	bool applyEdits)
{
	bool copySamples = true;	// LATER allow false => reference samples

	MP4TrackId dstTrackId =
		MP4CloneTrack(srcFile, srcTrackId, dstFile);

	if (dstTrackId == MP4_INVALID_TRACK_ID) {
		return dstTrackId;
	}

	bool viaEdits =
		applyEdits && MP4GetTrackNumberOfEdits(srcFile, srcTrackId);

	MP4SampleId sampleId = 0;
	MP4SampleId numSamples = 
		MP4GetTrackNumberOfSamples(srcFile, srcTrackId);

	MP4Timestamp when = 0;
	MP4Duration editsDuration = 
		MP4GetTrackEditTotalDuration(srcFile, srcTrackId);

	while (true) {
		MP4Duration sampleDuration = MP4_INVALID_DURATION;

		if (viaEdits) {
			sampleId = MP4GetSampleIdFromEditTime(
				srcFile,
				srcTrackId,
				when,
				NULL,
				&sampleDuration);

			// in theory, this shouldn't happen
			if (sampleId == MP4_INVALID_SAMPLE_ID) {
				MP4DeleteTrack(dstFile, dstTrackId);
				return MP4_INVALID_TRACK_ID;
			}

			when += sampleDuration;

			if (when >= editsDuration) {
				break;
			}
		} else {
			sampleId++;
			if (sampleId > numSamples) {
				break;
			}
		}

		bool rc = false;

		if (copySamples) {
			rc = MP4CopySample(
				srcFile,
				srcTrackId,
				sampleId,
				dstFile,
				dstTrackId,
				sampleDuration);

		} else {
			rc = MP4ReferenceSample(
				srcFile,
				srcTrackId,
				sampleId,
				dstFile,
				dstTrackId,
				sampleDuration);
		}

		if (!rc) {
			MP4DeleteTrack(dstFile, dstTrackId);
			return MP4_INVALID_TRACK_ID;
		}
	}

	return dstTrackId;
}

extern "C" bool MP4DeleteTrack(
	MP4FileHandle hFile, 
	MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->DeleteTrack(trackId);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int32_t MP4GetNumberOfTracks(
	MP4FileHandle hFile, 
	const char* type,
	u_int8_t subType)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetNumberOfTracks(type, subType);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" MP4TrackId MP4FindTrackId(
	MP4FileHandle hFile, 
	u_int16_t index, 
	const char* type,
	u_int8_t subType)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->FindTrackId(index, type, subType);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TRACK_ID;
}

extern "C" u_int16_t MP4FindTrackIndex(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->FindTrackIndex(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return (u_int16_t)-1;
}

/* specific track properties */

extern "C" const char* MP4GetTrackType(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackType(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return NULL;
}

extern "C" MP4Duration MP4GetTrackDuration(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackDuration(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" u_int32_t MP4GetTrackTimeScale(
	MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackTimeScale(trackId);
		}
		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;
}

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;
}


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;
}

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" void 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;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	*ppConfig = NULL;
	*pConfigSize = 0;
	return;
}

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.mp4v.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.mp4v.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,
	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(
	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)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetHintTrackRtpPayload(
				hintTrackId, pPayloadName, pPayloadNumber, maxPayloadSize, encode_params);
			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 {
			return ((MP4File*)hFile)->GetRtpHintNumberOfPackets(hintTrackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" int8_t MP4GetRtpPacketBFrame(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	u_int16_t packetIndex)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->
				GetRtpPacketBFrame(hintTrackId, packetIndex);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return -1;
}

extern "C" int32_t MP4GetRtpPacketTransmitOffset(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	u_int16_t packetIndex)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->
				GetRtpPacketTransmitOffset(hintTrackId, packetIndex);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" bool MP4ReadRtpPacket(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	u_int16_t packetIndex,
	u_int8_t** ppBytes, 
	u_int32_t* pNumBytes,
	u_int32_t ssrc,
	bool includeHeader,
	bool includePayload)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->ReadRtpPacket(
				hintTrackId, packetIndex, 
				ppBytes, pNumBytes, 
				ssrc, includeHeader, includePayload);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" MP4Timestamp MP4GetRtpTimestampStart(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetRtpTimestampStart(hintTrackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TIMESTAMP;
}

extern "C" bool MP4SetRtpTimestampStart(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	MP4Timestamp rtpStart)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetRtpTimestampStart(
				hintTrackId, rtpStart);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4AddRtpHint(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId)
{
	return MP4AddRtpVideoHint(hFile, hintTrackId, false, 0);
}

extern "C" bool MP4AddRtpVideoHint(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	bool isBframe, 
	u_int32_t timestampOffset)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->AddRtpHint(hintTrackId, 
				isBframe, timestampOffset);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4AddRtpPacket(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	bool setMbit,
	int32_t transmitOffset)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->AddRtpPacket(
				hintTrackId, setMbit, transmitOffset);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4AddRtpImmediateData(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	const u_int8_t* pBytes,
	u_int32_t numBytes)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->AddRtpImmediateData(hintTrackId, 
				pBytes, numBytes);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4AddRtpSampleData(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	MP4SampleId sampleId,
	u_int32_t dataOffset,
	u_int32_t dataLength)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->AddRtpSampleData(
				hintTrackId, sampleId, dataOffset, dataLength);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4AddRtpESConfigurationPacket(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->AddRtpESConfigurationPacket(hintTrackId);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4WriteRtpHint(
	MP4FileHandle hFile,
	MP4TrackId hintTrackId,
	MP4Duration duration,
	bool isSyncSample)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->WriteRtpHint(
				hintTrackId, duration, isSyncSample);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

/* ISMA specific operations */

extern "C" bool MP4MakeIsmaCompliant(
	const char* fileName, 
	u_int32_t verbosity,
	bool addIsmaComplianceSdp)
{
	MP4File* pFile = NULL;

	try {
		pFile = new MP4File(verbosity);
		pFile->Modify(fileName);
		pFile->MakeIsmaCompliant(addIsmaComplianceSdp);
		pFile->Close();
		delete pFile;
		return true;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
	}
	delete pFile;
	return false;
}

extern "C" char* MP4MakeIsmaSdpIod(
	u_int8_t videoProfile,
	u_int32_t videoBitrate,
	u_int8_t* videoConfig,
	u_int32_t videoConfigLength,
	u_int8_t audioProfile,
	u_int32_t audioBitrate,
	u_int8_t* audioConfig,
	u_int32_t audioConfigLength,
	u_int32_t verbosity)
{
	MP4File* pFile = NULL;

	try {
		pFile = new MP4File(verbosity);

		u_int8_t* pBytes = NULL;
		u_int64_t numBytes = 0;

		pFile->CreateIsmaIodFromParams(
			videoProfile,
			videoBitrate,
			videoConfig,
			videoConfigLength,
			audioProfile,
			audioBitrate,
			audioConfig,
			audioConfigLength,
			&pBytes,
			&numBytes);

		char* iodBase64 = 
			MP4ToBase64(pBytes, numBytes);
		MP4Free(pBytes);

		char* sdpIod = 
			(char*)MP4Malloc(strlen(iodBase64) + 64);
		sprintf(sdpIod,
			"a=mpeg4-iod: \042data:application/mpeg4-iod;base64,%s\042",
			iodBase64);
		MP4Free(iodBase64);

		delete pFile;

		return sdpIod;
	}
	catch (MP4Error* e) {
		VERBOSE_ERROR(verbosity, e->Print());
		delete e;
	}
	delete pFile;
	return NULL;
}

/* Edit list */

extern "C" MP4EditId MP4AddTrackEdit(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId,
	MP4Timestamp startTime,
	MP4Duration duration,
	bool dwell)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			MP4EditId newEditId =
				((MP4File*)hFile)->AddTrackEdit(trackId, editId);

			if (newEditId != MP4_INVALID_EDIT_ID) {
				((MP4File*)hFile)->SetTrackEditMediaStart(
					trackId, newEditId, startTime);
				((MP4File*)hFile)->SetTrackEditDuration(
					trackId, newEditId, duration);
				((MP4File*)hFile)->SetTrackEditDwell(
					trackId, newEditId, dwell);
			}

			return newEditId;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_EDIT_ID;
}

extern "C" bool MP4DeleteTrackEdit(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->DeleteTrackEdit(trackId, editId);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" u_int32_t MP4GetTrackNumberOfEdits(
	MP4FileHandle hFile,
	MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackNumberOfEdits(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return 0;
}

extern "C" MP4Timestamp MP4GetTrackEditMediaStart(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackEditMediaStart(
				trackId, editId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_TIMESTAMP;
}

extern "C" MP4Duration MP4GetTrackEditTotalDuration(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackEditTotalDuration(
				trackId, editId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" bool MP4SetTrackEditMediaStart(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId,
	MP4Timestamp startTime)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackEditMediaStart(
				trackId, editId, startTime);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" MP4Duration MP4GetTrackEditDuration(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackEditDuration(trackId, editId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_DURATION;
}

extern "C" bool MP4SetTrackEditDuration(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId,
	MP4Duration duration)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackEditDuration(trackId, editId, duration);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" int8_t MP4GetTrackEditDwell(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetTrackEditDwell(trackId, editId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return -1;
}

extern "C" bool MP4SetTrackEditDwell(
	MP4FileHandle hFile,
	MP4TrackId trackId,
	MP4EditId editId,
	bool dwell)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->SetTrackEditDwell(trackId, editId, dwell);
			return true;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return false;
}

extern "C" bool MP4ReadSampleFromEditTime(
	/* 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)
{
	MP4SampleId sampleId = 
		MP4GetSampleIdFromEditTime(
			hFile,
			trackId, 
			when, 
			pStartTime,
			pDuration);

	return MP4ReadSample(
		hFile,
		trackId, 
		sampleId, 
		ppBytes, 
		pNumBytes, 
		NULL,
		NULL, 
		pRenderingOffset, 
		pIsSyncSample);
}

extern "C" MP4SampleId MP4GetSampleIdFromEditTime(
	MP4FileHandle hFile,
	MP4TrackId trackId, 
	MP4Timestamp when,
	MP4Timestamp* pStartTime,
	MP4Duration* pDuration)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->GetSampleIdFromEditTime(
				trackId, when, pStartTime, pDuration);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
	return MP4_INVALID_SAMPLE_ID;
}

/* Utlities */

extern "C" char* MP4BinaryToBase16(
	const u_int8_t* pData, 
	u_int32_t dataSize)
{
	if (pData || dataSize == 0) {
		try {
			return MP4ToBase16(pData, dataSize);
		}
		catch (MP4Error* e) {
			delete e;
		}
	}
	return NULL;
}

extern "C" char* MP4BinaryToBase64(
	const u_int8_t* pData, 
	u_int32_t dataSize)
{
	if (pData || dataSize == 0) {
		try {
			return MP4ToBase64(pData, dataSize);
		}
		catch (MP4Error* e) {
			delete e;
		}
	}
	return NULL;
}

/* tagging functions */

extern "C" bool MP4TagDelete(MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->TagDelete(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
}

extern "C" bool MP4TagAddEntry(MP4FileHandle hFile, MP4TrackId trackId,
                               const char *name, const char *value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->TagAddEntry(trackId, name, value);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
}

#if 0
extern "C" void MP4TagDeleteEntry(MP4FileHandle hFile, MP4TrackId trackId,
                                  u_int32_t index)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->TagDeleteEntry(trackId, index);
            return;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
}
#endif

extern "C" u_int32_t MP4TagGetNumEntries(MP4FileHandle hFile, MP4TrackId trackId)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->TagGetNumEntries(trackId);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
            return 0;
		}
	}
}

extern "C" void MP4TagGetEntry(MP4FileHandle hFile, MP4TrackId trackId,
                               u_int32_t index, const char **name,
                               const char **value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			((MP4File*)hFile)->TagGetEntry(trackId, index,
                name, value);
            return;
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
}

extern "C" bool MP4TagGetEntryByName(MP4FileHandle hFile, MP4TrackId trackId,
                                     char *name, const char **value)
{
	if (MP4_IS_VALID_FILE_HANDLE(hFile)) {
		try {
			return ((MP4File*)hFile)->TagGetEntryByName(trackId, name, value);
		}
		catch (MP4Error* e) {
			PRINT_ERROR(e);
			delete e;
		}
	}
}