C++ BMediaTrack类代码示例

/*	isAudioDisc
*	checks if selected files are audio files, and greps the playtime of them
*	when all files audio files
*	returns true if audio disc
*/
bool
ProjectTypeSelector::isAudioDisc()
{
	BString *FileType;
	
	for(int i = 0; i < TypeList->CountItems(); i++) {
		FileType = (BString*)TypeList->ItemAt(i);
		if(FileType->Compare("audio", 5) != 0)
			return false;
	}
	
	entry_ref ref;
	BMediaFile *mediaFile;
	bigtime_t time = 0;
	
	for(int i = 0; i < FileList->CountItems(); i++){
		get_ref_for_path(((BString*)FileList->ItemAt(i))->String(), &ref);
		mediaFile = new BMediaFile(&ref);
		BMediaTrack *track = NULL;
		
		for(int j = 0; j < mediaFile->CountTracks(); j++){
			track = mediaFile->TrackAt(j);
			time = track->Duration();
			intPlayTime += ((int)time / 1000000);
		}
		
		delete mediaFile;
	}
		
	return true;
}

int
main(int argc, char *argv[])
{
	if (argc != 2) {
		fprintf(stderr, "Usage:\n  %s <filename>\n", argv[0]);
		return 1;
	}
	
	entry_ref ref;
	if (get_ref_for_path(argv[1], &ref)!=B_OK)
		return 2;
	BMediaFile *playFile = new BMediaFile(&ref);
	if (playFile->InitCheck()<B_OK) {
		delete playFile;
		return 2;
	}
	
	for (int ix=0; ix<playFile->CountTracks(); ix++) {
		BMediaTrack * track = playFile->TrackAt(ix);
		playFormat.type = B_MEDIA_RAW_AUDIO;
		if ((track->DecodedFormat(&playFormat) == B_OK) 
			&& (playFormat.type == B_MEDIA_RAW_AUDIO)) {
			playTrack = track;
			break;
		}
		if (track)
			playFile->ReleaseTrack(track);
	}
	// Good relations with the Wookiees, I have. 
	signal(SIGINT, keyb_int);

	new BApplication("application/x-vnd.Antares-playfile");
	finished = create_sem(0, "finish wait");
	
	printf("playing file...\n");
	
	// Execute Plan 66!
	sp = new BSoundPlayer(&playFormat.u.raw_audio, "playfile", play_buffer);
	sp->SetVolume(1.0f);

	// Join me, Padmé and together we can rule this galaxy. 
	sp->SetHasData(true);
	sp->Start();

	acquire_sem(finished);

	if (interrupt) {
		// Once more, the Sith will rule the galaxy. 
		printf("interrupted\n");
		sp->Stop();
		kill_thread(reader);
	}

	printf("playback finished\n");

	delete sp;
	delete playFile;
}

AudioTrack*
TrackIO::ImportAudio(BMediaFile* mediaFile, const char* name)
{
	TrackIndex* index = new TrackIndex();

	media_format format;

	MediaFormatBuilder::BuildAudioBlockRawFormat(&format);

	// TODO check original file format to ask 
	// if the user want it to be resampled or not.
	// NOTE atm we are considering only the first track, may and probably will
	// change in future, or at least the user should be able to select which track
	// to import (eventually all and as separated track).
	BMediaTrack* track = mediaFile->TrackAt(0);
	if (track->DecodedFormat(&format) != B_OK) {
		// Critical error show a popup
		return NULL;
	}

	uint32 channels = format.u.raw_audio.channel_count;
	for (uint32 i = 0; i < channels; i++) {
		MediaBlockMap* channel = new MediaBlockMap();
		index->AddChannel(channel);
	}

	WindowsManager::ProgressUpdate(10.0f, "Loading audio data");

	int64 frames = 0;

	int64 bufferFrames = (format.u.raw_audio.buffer_size
		/ (format.u.raw_audio.format 
		& media_raw_audio_format::B_AUDIO_SIZE_MASK));

	float buffer[bufferFrames];

	memset(&buffer, 0, format.u.raw_audio.buffer_size);
	while (track->ReadFrames(buffer, &frames) == B_OK) {
		_BuildBlocks((float*)buffer, frames*channels, index,
			channels);
		memset(&buffer, 0, format.u.raw_audio.buffer_size);
	}

	WindowsManager::ProgressUpdate(50.0f, "Flushing data and preview");

	mediaFile->ReleaseTrack(track);

	// This is done to optimize writes, the data is cached in a buffer
	// and then written to the BPositionIO.
	for (uint32 j = 0; j < index->CountChannels(); j++)
		index->ChannelAt(j)->Writer()->Flush();

	return new AudioTrack(name, index);
}

/*	FUNCTION:		Video :: Video
	ARGUMENTS:		ref
	RETURN:			n/a
	DESCRIPTION:	Constructor
*/
Video :: Video(entry_ref *ref)
{
	fMediaFile = 0;
	fVideoTrack = 0;
	fBitmap = 0;
	fVideoThread = 0;
	
	fMediaFile = new BMediaFile(ref, B_MEDIA_FILE_BIG_BUFFERS);
	fStatus = fMediaFile->InitCheck();
	if (fStatus != B_OK)
		return;
		
	int32 num_tracks = fMediaFile->CountTracks();
	for (int32 i=0; i < num_tracks; i++)
	{
		BMediaTrack *track = fMediaFile->TrackAt(i);
		if (track == NULL)
		{
			fMediaFile->ReleaseAllTracks();
			printf("Media file claims to have %ld tracks, cannot find track %ld\n", num_tracks, i);
			fVideoTrack = 0;
			return;
		}
		
		media_format mf;
		fStatus = track->EncodedFormat(&mf);
		if (fStatus == B_OK)
		{
			switch (mf.type)
			{
				case B_MEDIA_ENCODED_VIDEO:
				case B_MEDIA_RAW_VIDEO:
					if (fVideoTrack == 0)
					{
						fVideoTrack = track;
						InitPlayer(&mf);
					}
					else
						printf("Multiple video tracks not supported\n");
					break;
				default:
					fStatus = B_ERROR;
			}
		}
		
		if (fStatus != B_OK)
			fMediaFile->ReleaseTrack(track);
	}
	
	if (fVideoTrack)
		fStatus = B_OK;
}

MediaFilePlayer::MediaFilePlayer(const char* media_type,
	const char* media_name, entry_ref* ref)
	:
	fName(media_name),
	fInitCheck(B_ERROR),
	fRef(*ref),
	fSoundPlayer(NULL),
	fPlayTrack(NULL)
{
	fPlayFile = new BMediaFile(&fRef);
	fInitCheck = fPlayFile->InitCheck();
	if (fInitCheck != B_OK)
		return;

	memset(&fPlayFormat, 0, sizeof(fPlayFormat));

	for (int i=0; i < fPlayFile->CountTracks(); i++) {
		BMediaTrack* track = fPlayFile->TrackAt(i);
		if (track == NULL)
			continue;
		fPlayFormat.type = B_MEDIA_RAW_AUDIO;
		fPlayFormat.u.raw_audio.buffer_size = 256;
		if ((track->DecodedFormat(&fPlayFormat) == B_OK)
			&& (fPlayFormat.type == B_MEDIA_RAW_AUDIO)) {
			fPlayTrack = track;
			break;
		}
		fPlayFile->ReleaseTrack(track);
	}

	if (fPlayTrack == NULL) {
		fInitCheck = B_BAD_VALUE;
		return;
	}

	fSoundPlayer = new BSoundPlayer(&fPlayFormat.u.raw_audio,
		media_name, PlayFunction, NULL, this);

	fInitCheck = fSoundPlayer->InitCheck();
	if (fInitCheck != B_OK)
		return;

	fSoundPlayer->SetVolume(1.0f);
	fSoundPlayer->SetHasData(true);
	fSoundPlayer->Start();
}

AudioProducer::~AudioProducer()
{
	TRACE("%p->AudioProducer::~AudioProducer()\n", this);

#if DEBUG_TO_FILE
	BMediaTrack* track;
	if (BMediaFile* file = init_media_file(fPreferredFormat, &track)) {
		printf("deleting file...\n");
		track->Flush();
		file->ReleaseTrack(track);
		file->CloseFile();
		delete file;
	}
#endif // DEBUG_TO_FILE

	// Stop the BMediaEventLooper thread
	Quit();
	TRACE("AudioProducer::~AudioProducer() done\n");
}

void 
MediaFileInfoView::_GetFileInfo(BString* audioFormat, BString* videoFormat,
	BString* audioDetails, BString* videoDetails, BString* duration)
{
	fDuration = 0;
	if (fMediaFile == NULL)
		return;
	
	BMediaTrack* track;
	media_format format;
	memset(&format, 0, sizeof(format));
	media_codec_info codecInfo;
	bool audioDone(false), videoDone(false);
	bigtime_t audioDuration = 0;
	bigtime_t videoDuration = 0;
	int32 tracks = fMediaFile->CountTracks();
	int64 videoFrames = 0;
	int64 audioFrames = 0;
	for (int32 i = 0; i < tracks && (!audioDone || !videoDone); i++) {
		track = fMediaFile->TrackAt(i);
		if (track != NULL) {
			track->EncodedFormat(&format);
			if (format.IsVideo()) {
				memset(&format, 0, sizeof(format));
				format.type = B_MEDIA_RAW_VIDEO;
				track->DecodedFormat(&format);
				media_raw_video_format *rvf = &(format.u.raw_video);

				track->GetCodecInfo(&codecInfo);
				*videoFormat << codecInfo.pretty_name;
				videoDuration = track->Duration();
				videoFrames = track->CountFrames();

				*videoDetails << (int32)format.Width() << "x" << (int32)format.Height()
							 << " " << (int32)(rvf->field_rate / rvf->interlace)
							 << " fps / "  << videoFrames << " frames";

				videoDone = true;

			} else if (format.IsAudio()) {
				memset(&format, 0, sizeof(format));
				format.type = B_MEDIA_RAW_AUDIO;
				track->DecodedFormat(&format);
				media_raw_audio_format *raf = &(format.u.raw_audio);
				char bytesPerSample = (char)(raf->format & 0xf);
				if (bytesPerSample == 1) {
					*audioDetails << "8 bit ";
				} else if (bytesPerSample == 2) {
					*audioDetails << "16 bit ";
				} else {
					*audioDetails << bytesPerSample << "byte ";
				}

				track->GetCodecInfo(&codecInfo);
				*audioFormat << codecInfo.pretty_name;
				audioDuration = track->Duration();
				audioFrames = track->CountFrames();

				*audioDetails << (float)(raf->frame_rate / 1000.0f) << " kHz";
				if (raf->channel_count == 1) {
					*audioDetails << " mono / ";
				} else if (raf->channel_count == 2) {
					*audioDetails << " stereo / ";
				} else {
					*audioDetails << (int32)raf->channel_count << " channel / " ;
				}
				*audioDetails << audioFrames << " frames";
				audioDone = true;
			}
			fMediaFile->ReleaseTrack(track);
		}	
	}

	fDuration = MAX(audioDuration, videoDuration);
	*duration << (int32)(fDuration / 1000000)
			  << " seconds";
}

// Init
status_t
VideoClip::Init(const entry_ref* ref)
{
    // check if this file is a MediaFile
    // instantiate a BMediaFile object, and make sure there was no error.
    fMediaFile = new BMediaFile(ref);
    status_t err = fMediaFile->InitCheck();
    if (err < B_OK) {
        fprintf(stderr, "VideoClip::Init() - "
                "no media file: %s\n", strerror(err));
        return err;
    }
    // count the tracks and instanciate them, one at a time
    int32 numTracks = fMediaFile->CountTracks();
    for (int32 i = 0; i < numTracks; i++) {
        if (fTrack)
            break;

        BMediaTrack* track = fMediaFile->TrackAt(i);
        if (!track) {
            fprintf(stderr, "VideoClip::Init() - "
                    "cannot read media track at %ld\n", i);
            continue;
        }
        // get the encoded format
        media_format format;
        err = track->EncodedFormat(&format);
        if (err < B_OK) {
            fprintf(stderr, "VideoClip::Init() - "
                    "cannot understand encoded format "
                    "of track %ld: %s\n", i, strerror(err));
            continue;
        }
        switch(format.type) {
        case B_MEDIA_RAW_VIDEO:
        case B_MEDIA_ENCODED_VIDEO: {
            // video track
            fTrack = track;
            break;
        }
        case B_MEDIA_RAW_AUDIO:
            // audio track
            break;
        case B_MEDIA_ENCODED_AUDIO:
            // audio track
            break;
        default:
            break;
        }
        if (fTrack != track) {
            // didn't do anything with the track
            fMediaFile->ReleaseTrack(track);
        }
    }

    if (!fTrack)
        return B_UNSUPPORTED;

    err = fTrack->EncodedFormat(&fFormat);
    if (err < B_OK) {
        fprintf(stderr, "VideoClip::Init() - "
                "fTrack->EncodedFormat(): %s\n",
                strerror(err));
        return err;
    }

    // get encoded video frame size
    uint32 width = fFormat.u.encoded_video.output.display.line_width;
    uint32 height = fFormat.u.encoded_video.output.display.line_count;
    printf("VideoClip::Init() - native colorspace: %s\n",
           string_for_color_space(fFormat.u.encoded_video.output.display.format));

    // allocate a buffer large enough to contain the decoded frame.
    BRect videoBounds(0.0, 0.0, width - 1, height - 1);
    fBuffer = new BBitmap(videoBounds, 0, B_YCbCr422);

    err = fBuffer->InitCheck();

    if (err < B_OK) {
        fprintf(stderr, "VideoClip::Init() - "
                "error allocating buffer: %s\n",
                strerror(err));
        delete fBuffer;
        fBuffer = NULL;
        return err;
    }

    // specifiy the decoded format. we derive this information from
    // the encoded format.
    memset(&fFormat, 0, sizeof(media_format));
    fFormat.u.raw_video.last_active = height - 1;
//	fFormat.u.raw_video.orientation = B_VIDEO_TOP_LEFT_RIGHT;
//	fFormat.u.raw_video.pixel_width_aspect = 1;
//	fFormat.u.raw_video.pixel_height_aspect = 1;
    fFormat.u.raw_video.display.format = fBuffer->ColorSpace();
    fFormat.u.raw_video.display.line_width = width;
    fFormat.u.raw_video.display.line_count = height;
    fFormat.u.raw_video.display.bytes_per_row = fBuffer->BytesPerRow();

//.........这里部分代码省略.........

BBuffer*
AudioProducer::_FillNextBuffer(bigtime_t eventTime)
{
	BBuffer* buffer = fBufferGroup->RequestBuffer(
		fOutput.format.u.raw_audio.buffer_size, BufferDuration());

	if (!buffer) {
		ERROR("AudioProducer::_FillNextBuffer() - no buffer\n");
		return NULL;
	}

	size_t sampleSize = fOutput.format.u.raw_audio.format
		& media_raw_audio_format::B_AUDIO_SIZE_MASK;
	size_t numSamples = fOutput.format.u.raw_audio.buffer_size / sampleSize;
		// number of sample in the buffer

	// fill in the buffer header
	media_header* header = buffer->Header();
	header->type = B_MEDIA_RAW_AUDIO;
	header->time_source = TimeSource()->ID();
	buffer->SetSizeUsed(fOutput.format.u.raw_audio.buffer_size);

	bigtime_t performanceTime = bigtime_t(double(fFramesSent)
		* 1000000.0 / double(fOutput.format.u.raw_audio.frame_rate));

	// fill in data from audio supplier
	int64 frameCount = numSamples / fOutput.format.u.raw_audio.channel_count;
	bigtime_t startTime = performanceTime;
	bigtime_t endTime = bigtime_t(double(fFramesSent + frameCount)
		* 1000000.0 / fOutput.format.u.raw_audio.frame_rate);

	if (!fSupplier || fSupplier->InitCheck() != B_OK
		|| fSupplier->GetFrames(buffer->Data(), frameCount, startTime,
			endTime) != B_OK) {
		ERROR("AudioProducer::_FillNextBuffer() - supplier error -> silence\n");
		memset(buffer->Data(), 0, buffer->SizeUsed());
	}

	// stamp buffer
	if (RunMode() == B_RECORDING) {
		header->start_time = eventTime;
	} else {
		header->start_time = fStartTime + performanceTime;
	}

#if DEBUG_TO_FILE
	BMediaTrack* track;
	if (BMediaFile* file = init_media_file(fOutput.format, &track)) {
		track->WriteFrames(buffer->Data(), frameCount);
	}
#endif // DEBUG_TO_FILE

	if (fPeakListener
		&& fOutput.format.u.raw_audio.format
			== media_raw_audio_format::B_AUDIO_FLOAT) {
		// TODO: extend the peak notifier for other sample formats
		int32 channels = fOutput.format.u.raw_audio.channel_count;
		float max[channels];
		float min[channels];
		for (int32 i = 0; i < channels; i++) {
			max[i] = -1.0;
			min[i] = 1.0;
		}
		float* sample = (float*)buffer->Data();
		for (uint32 i = 0; i < frameCount; i++) {
			for (int32 k = 0; k < channels; k++) {
				if (*sample < min[k])
					min[k] = *sample;
				if (*sample > max[k])
					max[k] = *sample;
				sample++;
			}
		}
		BMessage message(MSG_PEAK_NOTIFICATION);
		for (int32 i = 0; i < channels; i++) {
			float maxAbs = max_c(fabs(min[i]), fabs(max[i]));
			message.AddFloat("max", maxAbs);
		}
		bigtime_t realTime = TimeSource()->RealTimeFor(
			fStartTime + performanceTime, 0);
		MessageEvent* event = new (std::nothrow) MessageEvent(realTime,
			fPeakListener, message);
		if (event != NULL)
			EventQueue::Default().AddEvent(event);
	}

	return buffer;
}

void
VideoFileTexture::_Load(const char* fileName)
{
	BEntry entry(fileName);
	entry_ref ref;
	entry.GetRef(&ref);

	fMediaFile = new BMediaFile(&ref);
	status_t err = fMediaFile->InitCheck();
	if (err != B_OK) {
		printf("cannot contruct BMediaFile object -- %s\n", strerror(err));
		return;
	}

	int32 trackCount = fMediaFile->CountTracks();

	for (int32 i = 0; i < trackCount; i++) {
		BMediaTrack* track = fMediaFile->TrackAt(i);
		if (track == NULL) {
			printf("cannot contruct BMediaTrack object\n");
			return;
		}

		// get the encoded format
		media_format format;
		err = track->EncodedFormat(&format);
		if (err != B_OK) {
			printf("BMediaTrack::EncodedFormat error -- %s\n", strerror(err));
			return;
		}

		if (format.type == B_MEDIA_ENCODED_VIDEO) {
			fVideoTrack = track;
			// allocate a bitmap large enough to contain the decoded frame.
			BRect bounds(0.0, 0.0,
				format.u.encoded_video.output.display.line_width - 1.0,
				format.u.encoded_video.output.display.line_count - 1.0);
			fVideoBitmap = new BBitmap(bounds, B_RGB32);

			// specifiy the decoded format. we derive this information from
			// the encoded format.
			memset(&format, 0, sizeof(media_format));
			format.u.raw_video.last_active = (int32) (bounds.Height() - 1.0);
			format.u.raw_video.orientation = B_VIDEO_TOP_LEFT_RIGHT;
			format.u.raw_video.pixel_width_aspect = 1;
			format.u.raw_video.pixel_height_aspect = 3;
			format.u.raw_video.display.format = fVideoBitmap->ColorSpace();
			format.u.raw_video.display.line_width = (int32) bounds.Width();
			format.u.raw_video.display.line_count = (int32) bounds.Height();
			format.u.raw_video.display.bytes_per_row
				= fVideoBitmap->BytesPerRow();

			err = fVideoTrack->DecodedFormat(&format);
			if (err != B_OK) {
				printf("error with BMediaTrack::DecodedFormat() -- %s\n",
					strerror(err));
				return;
			}

			// Create Texture
			glGenTextures(1, &fId);
			glBindTexture(GL_TEXTURE_2D, fId);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
			glTexImage2D(GL_TEXTURE_2D, 0, 4,
				(int) fVideoBitmap->Bounds().Width() + 1,
				(int) fVideoBitmap->Bounds().Height() + 1,
				0, GL_BGRA, GL_UNSIGNED_BYTE, fVideoBitmap->Bits());
		}
	}
}

status_t
MediaView::SetMediaSource(BPositionIO *data)
{
	BAutolock autolock(Window());

	fMediaFile = new BMediaFile(data);
	
	file = data;
	
	bool	foundTrack = false;
	int32	numTracks = fMediaFile->CountTracks();

	for (int32 i = 0; i < numTracks; i++) {
		BMediaTrack *track = fMediaFile->TrackAt(i);
		
		if (track == NULL) {
			Reset();
			return (B_ERROR);
		}
		else {
			bool			trackUsed = false;
			media_format	mf;

			if (track->EncodedFormat(&mf) == B_NO_ERROR) {			
				switch (mf.type) {
					case B_MEDIA_ENCODED_VIDEO:
printf("#################field rate %f\n", mf.u.encoded_video.output.field_rate);
						trackUsed = SetVideoTrack(data, track, &mf) == B_NO_ERROR;
						break;
	
					case B_MEDIA_RAW_AUDIO:
						trackUsed = SetAudioTrack(data, track, &mf) == B_NO_ERROR;
						break;
						
					case B_MEDIA_ENCODED_AUDIO:
						if (track->DecodedFormat(&mf) == B_NO_ERROR)			
							trackUsed = SetAudioTrack(data, track, &mf) == B_NO_ERROR;
						break;

					default:
						break;
				}
			}
	
			if (trackUsed)
				foundTrack = true;
			else {
				fMediaFile->ReleaseTrack(track);
			}
		}
	}

	if (foundTrack) {
		status_t err = B_ERROR;
	
		fPlayerThread = spawn_thread(MediaView::MediaPlayer, 
									 "MediaView::MediaPlayer",
									 95,
									 this);
	
		if (fPlayerThread < B_NO_ERROR) {
			err = fPlayerThread;
			fPlayerThread = B_ERROR;
			Reset();
	
			return (err);
		}
	
		fPlaySem = create_sem(0, "MediaView::fPlaySem");
		if (fPlaySem < B_NO_ERROR) {
			err = fPlaySem;
			fPlaySem = B_ERROR;
			Reset();

			return (err);
		}

		err = resume_thread(fPlayerThread);
	
		if (err != B_NO_ERROR) {
			kill_thread(fPlayerThread);
			fPlayerThread = B_ERROR;
			Reset();

			return (err);
		}

		if (fVideoTrack != NULL)
			fMediaBar->SetTotalTime(fVideoTrack->Duration());
		else
			fMediaBar->SetTotalTime(fAudioTrack->Duration());			
	}
	return (B_NO_ERROR);
}

status_t
MediaConverterApp::_ConvertFile(BMediaFile* inFile, BMediaFile* outFile,
	media_codec_info* audioCodec, media_codec_info* videoCodec,
	int32 audioQuality, int32 videoQuality,
	bigtime_t startDuration, bigtime_t endDuration)
{
	BMediaTrack* inVidTrack = NULL;
	BMediaTrack* inAudTrack = NULL;
	BMediaTrack* outVidTrack = NULL;
	BMediaTrack* outAudTrack = NULL;

	media_format inFormat;
	media_format outAudFormat;
	media_format outVidFormat;

	media_raw_audio_format* raf = NULL;
	media_raw_video_format* rvf = NULL;

	int32 width = -1;
	int32 height = -1;

	uint8* videoBuffer = NULL;
	uint8* audioBuffer = NULL;

	// gather the necessary format information and construct output tracks
	int64 videoFrameCount = 0;
	int64 audioFrameCount = 0;

	status_t ret = B_OK;

	int32 tracks = inFile->CountTracks();
	for (int32 i = 0; i < tracks && (!outAudTrack || !outVidTrack); i++) {
		BMediaTrack* inTrack = inFile->TrackAt(i);
		memset(&inFormat, 0, sizeof(media_format));
		inTrack->EncodedFormat(&inFormat);
		if (inFormat.IsAudio() && (audioCodec != NULL)) {
			inAudTrack = inTrack;
			memset(&outAudFormat, 0, sizeof(media_format));
			outAudFormat.type = B_MEDIA_RAW_AUDIO;
			raf = &(outAudFormat.u.raw_audio);
			inTrack->DecodedFormat(&outAudFormat);

			audioBuffer = new uint8[raf->buffer_size];
//			audioFrameSize = (raf->format & media_raw_audio_format::B_AUDIO_SIZE_MASK)
//			audioFrameSize = (raf->format & 0xf) * raf->channel_count;
			outAudTrack = outFile->CreateTrack(&outAudFormat, audioCodec);

			if (outAudTrack != NULL) {
				if (outAudTrack->SetQuality(audioQuality / 100.0f) != B_OK
					&& fWin->Lock()) {
					fWin->SetAudioQualityLabel(
						B_TRANSLATE("Audio quality not supported"));
					fWin->Unlock();
				}
			}

		} else if (inFormat.IsVideo() && (videoCodec != NULL)) {
			inVidTrack = inTrack;
			width = (int32)inFormat.Width();
			height = (int32)inFormat.Height();

			// construct desired decoded video format
			memset(&outVidFormat, 0, sizeof(outVidFormat));
			outVidFormat.type = B_MEDIA_RAW_VIDEO;
			rvf = &(outVidFormat.u.raw_video);
			rvf->last_active = (uint32)(height - 1);
			rvf->orientation = B_VIDEO_TOP_LEFT_RIGHT;
			rvf->display.format = B_RGB32;
			rvf->display.bytes_per_row = 4 * width;
			rvf->display.line_width = width;
			rvf->display.line_count = height;

			inVidTrack->DecodedFormat(&outVidFormat);

			if (rvf->display.format == B_RGBA32) {
				printf("fixing color space (B_RGBA32 -> B_RGB32)");
				rvf->display.format = B_RGB32;
			}
			// Transfer the display aspect ratio.
			if (inFormat.type == B_MEDIA_ENCODED_VIDEO) {
				rvf->pixel_width_aspect
					= inFormat.u.encoded_video.output.pixel_width_aspect;
				rvf->pixel_height_aspect
					= inFormat.u.encoded_video.output.pixel_height_aspect;
			} else {
				rvf->pixel_width_aspect
					= inFormat.u.raw_video.pixel_width_aspect;
				rvf->pixel_height_aspect
					= inFormat.u.raw_video.pixel_height_aspect;
			}

			videoBuffer = new (std::nothrow) uint8[height
				* rvf->display.bytes_per_row];
			outVidTrack = outFile->CreateTrack(&outVidFormat, videoCodec);

			if (outVidTrack != NULL) {
				// DLM Added to use 3ivx Parameter View
				const char* videoQualitySupport = NULL;
				BView* encoderView = outVidTrack->GetParameterView();
				if (encoderView) {
//.........这里部分代码省略.........

void LeftList::MessageReceived(BMessage* msg)
{
	struct AudioInfo fAudioInfo;
	BMediaFile* testfile;
	bool fIsAudio = false;
	BMediaTrack* track;
	media_codec_info codecInfo;
	media_format format;
	memset(&format, 0, sizeof(format));

	entry_ref ref;
	int32 counter = 0;

	switch (msg->what) {

		case B_SIMPLE_DATA:
			while (msg->FindRef("refs", counter++, &ref) == B_OK) {
				if ((testfile = new BMediaFile(&ref)) != NULL) {
					testfile->InitCheck();
					track = testfile->TrackAt(0);
					if (track != NULL) {
						track->EncodedFormat(&format);
						if (format.IsAudio()) {
							memset(&format, 0, sizeof(format));
							format.type = B_MEDIA_RAW_AUDIO;
							track->DecodedFormat(&format);
							fAudioInfo.total_time = track->Duration();
							media_raw_audio_format* raf = &(format.u.raw_audio);
							fAudioInfo.bps = (int32)(raf->format & 0xf);
							fAudioInfo.frame_rate = (int32)raf->frame_rate;
							fAudioInfo.channels = (int32)raf->channel_count;
							track->GetCodecInfo(&codecInfo);
							strcpy(fAudioInfo.pretty_name, codecInfo.pretty_name);
							strcpy(fAudioInfo.short_name, codecInfo.short_name);
							fIsAudio = true;
						}
					}
				} else
					WriteLog("MediaFile NULL (file doesnt exists!?)");

				delete testfile;
				if (fIsAudio) {
					if (!strcmp(fAudioInfo.pretty_name, "Raw Audio") && (fAudioInfo.channels == 2) && (fAudioInfo.frame_rate == 44100) && (fAudioInfo.bps == 2))
						AddItem(new LeftListItem(&ref, ref.name, fAudioBitmap, &fAudioInfo));
					else {
						BAlert* MyAlert = new BAlert("BurnItNow", "You can only burn 16 bits stereo 44.1 kHz Raw Audio files.\n (More audio files will be supported in the future)", "Ok", NULL, NULL, B_WIDTH_AS_USUAL, B_INFO_ALERT);
						MyAlert->Go();
					}
				} else {
					BPath temp_path;
					BEntry(&ref).GetPath(&temp_path);
					jpWindow* win = dynamic_cast<jpWindow*>(Window());
					if (win != NULL)
						win->SetISOFile((char*)temp_path.Path());
				}
			}
			break;
		default:
			BListView::MessageReceived(msg);
			break;
	}
}

int media_play(const char* uri)
{
	BUrl url;
	entry_ref ref;
	BMediaFile* playFile;

	if (get_ref_for_path(uri, &ref) != B_OK) {
		url.SetUrlString(uri);
		if (url.IsValid()) {
			playFile = new BMediaFile(url);
		} else
			return 2;
	} else
		playFile = new BMediaFile(&ref);

	if (playFile->InitCheck() != B_OK) {
		delete playFile;
		return 2;
	}
	
	for (int i = 0; i < playFile->CountTracks(); i++) {
		BMediaTrack* track = playFile->TrackAt(i);
		playFormat.type = B_MEDIA_RAW_AUDIO;
		if ((track->DecodedFormat(&playFormat) == B_OK) 
				&& (playFormat.type == B_MEDIA_RAW_AUDIO)) {
			playTrack = track;
			break;
		}
		if (track)
			playFile->ReleaseTrack(track);
	}

	// Good relations with the Wookiees, I have. 
	signal(SIGINT, keyb_int);

	finished = create_sem(0, "finish wait");
	
	printf("Playing file...\n");
	
	// Execute Plan 66!
	player = new BSoundPlayer(&playFormat.u.raw_audio, "playfile", play_buffer);
	player->SetVolume(1.0f);

	// Join me, Padmé and together we can rule this galaxy. 
	player->SetHasData(true);
	player->Start();

	acquire_sem(finished);

	if (interrupt == true) {
		// Once more, the Sith will rule the galaxy. 
		printf("Interrupted\n");
		player->Stop();
		kill_thread(reader);
	}

	printf("Playback finished.\n");

	delete player;
	delete playFile;

	return 0;
}

int
main(int argc, char *argv[])
{
	// 256 frames * 4 buffer parts * 2 channels * 2 bytes per sample
	// will give us internal buffer of 4096 bytes
	size_t framesPerBufferPart = 256;
	size_t bufferPartCount = 4;

	if (argc != 2 && argc != 4) {
		printf("Usage: %s <sound file name> [<frames per part> <parts>]\n",
			argv[0]);
		return 0;
	}

	if (argc == 4) {
		size_t size = strtoul(argv[2], NULL, 10);
		if (size > 0)
			framesPerBufferPart = size;

		size = strtoul(argv[3], NULL,  10);
		if (size == 1) {
			printf("at least 2 buffer parts are needed\n");
			return 1;
		}
		if (size > 0)
			bufferPartCount = size;
	}

	printf("frames per buffer part: %ld\n", framesPerBufferPart);
	printf("buffer part count: %ld\n", bufferPartCount);

	BEntry entry(argv[1]);
	if (entry.InitCheck() != B_OK || !entry.Exists()) {
		printf("cannot open input file\n");
		return 1;
	}

	entry_ref entryRef;
	entry.GetRef(&entryRef);

	BMediaFile mediaFile(&entryRef);
	if (mediaFile.InitCheck() != B_OK) {
		printf("file not supported\n");
		return 1;
	}

	if (mediaFile.CountTracks() == 0) {
		printf("no tracks found in file\n");
		return 1;
	}

	BMediaTrack *mediaTrack = mediaFile.TrackAt(0);
	if (mediaTrack == NULL) {
		printf("problem getting track from file\n");
		return 1;
	}

	// propose format, let it decide frame rate, channels number and buf size
	media_format format;
	memset(&format, 0, sizeof(format));
	format.type = B_MEDIA_RAW_AUDIO;
	format.u.raw_audio.format = media_raw_audio_format::B_AUDIO_SHORT;
	format.u.raw_audio.byte_order = B_MEDIA_LITTLE_ENDIAN;

	if (mediaTrack->DecodedFormat(&format) != B_OK) {
		printf("cannot set decoder output format\n");
		return 1;
	}

	printf("negotiated format:\n");
	printf("frame rate: %g Hz\n", format.u.raw_audio.frame_rate);
	printf("channel count: %ld\n", format.u.raw_audio.channel_count);
	printf("buffer size: %ld bytes\n", format.u.raw_audio.buffer_size);

	gs_audio_format gsFormat;
	memset(&gsFormat, 0, sizeof(gsFormat));
	gsFormat.frame_rate = format.u.raw_audio.frame_rate;
	gsFormat.channel_count = format.u.raw_audio.channel_count;
	gsFormat.format = format.u.raw_audio.format;
	gsFormat.byte_order = format.u.raw_audio.byte_order;

	BPushGameSound pushGameSound(framesPerBufferPart, &gsFormat,
		bufferPartCount);
	if (pushGameSound.InitCheck() != B_OK) {
		printf("trouble initializing push game sound: %s\n",
			strerror(pushGameSound.InitCheck()));
		return 1;
	}

	uint8 *buffer;
	size_t bufferSize;
	if (pushGameSound.LockForCyclic((void **)&buffer, &bufferSize)
			!= BPushGameSound::lock_ok) {
		printf("cannot lock buffer\n");
		return 1;
	}
	memset(buffer, 0, bufferSize);

	if (pushGameSound.StartPlaying() != B_OK) {
		printf("cannot start playback\n");
//.........这里部分代码省略.........