static void
VDADecoderCallback (void *decompressionOutputRefCon, CFDictionaryRef frameInfo, OSStatus status, uint32_t infoFlags, CVImageBufferRef imageBuffer)
{
MoonVDADecoder *decoder = (MoonVDADecoder *) decompressionOutputRefCon;
VideoStream *vs = (VideoStream *) decoder->GetStream ();
// FIXME: Is this always 1 thread? Can we optimize this
decoder->GetDeployment ()->RegisterThread ();
Deployment::SetCurrent (decoder->GetDeployment ());
if (imageBuffer == NULL) {
return;
}
OSType format_type = CVPixelBufferGetPixelFormatType (imageBuffer);
if (format_type != kCVPixelFormatType_422YpCbCr8) {
g_warning ("Mismatched format in VDA");
return;
}
MediaFrame *mf = (MediaFrame *) CFDictionaryGetValue (frameInfo, CFSTR ("MoonMediaFrame"));
mf->AddState (MediaFrameVUY2);
mf->FreeBuffer ();
mf->SetBufLen (0);
mf->srcSlideY = 0;
mf->srcSlideH = vs->GetHeight ();
mf->width = vs->GetWidth ();
mf->height = vs->GetHeight ();
CVPixelBufferLockBaseAddress (imageBuffer, 0);
mf->data_stride [0] = (uint8_t *) CVPixelBufferGetBaseAddress (imageBuffer);
mf->srcStride [0] = CVPixelBufferGetBytesPerRow (imageBuffer);
mf->AddState (MediaFrameDecoded);
mf->decoder_specific_data = imageBuffer;
CVPixelBufferRetain (imageBuffer);
decoder->ReportDecodeFrameCompleted (mf);
mf->unref ();
}
void
Mp3FrameReader::ReadFrame ()
{
MpegFrameHeader mpeg;
guint64 duration;
guint32 len;
MediaFrame *frame;
MemoryBuffer *current_source = demuxer->GetCurrentSource ();
guint64 start_position = current_source->GetPosition ();
if (!FindMpegHeader (&mpeg, NULL, current_source)) {
LOG_MP3 ("Mp3FrameReader::ReadFrame (): Not enough data (mpeg header not found or not enough data for entire frame) - requesting more\n");
if (!demuxer->RequestMoreData (ReadFrameCallback)) {
/* No more data */
LOG_MP3 ("Mp3FrameReader::ReadFrame (): reached end of stream.\n");
demuxer->ReportGetFrameCompleted (NULL);
}
return;
}
//printf ("Mp3FrameReader::ReadFrame():\n");
//mpeg_print_info (&mpeg);
if (mpeg.bit_rate == 0) {
// use the most recently specified bit rate
mpeg.bit_rate = bit_rate;
}
bit_rate = mpeg.bit_rate;
duration = mpeg_frame_duration (&mpeg);
AddFrameIndex (demuxer->GetCurrentPosition () + current_source->GetPosition (), cur_pts, duration, bit_rate);
len = (guint32) mpeg_frame_length (&mpeg);
/* Check if we have enough data */
if (current_source->GetRemainingSize () < len) {
/* We need to seek back to where we started reading this frame so that the next time we're called
* we start parsing from the beginning again */
current_source->SeekSet (start_position);
if (!demuxer->RequestMoreData (ReadFrameCallback, MAX (len, 1024))) {
/* No more data */
demuxer->ReportGetFrameCompleted (NULL);
return;
}
return;
}
frame = new MediaFrame (stream);
if (!frame->AllocateBuffer (len)) {
frame->unref ();
return;
}
if (!current_source->Read (frame->GetBuffer (), len)) {
/* This shouldn't happen, we've already checked that we have enough data */
demuxer->ReportErrorOccurred ("Mp3Demuxer could not read from stream.");
frame->unref ();
return;
}
frame->pts = cur_pts;
frame->duration = duration;
frame->AddState (MediaFrameDemuxed);
cur_pts += duration;
demuxer->ReportGetFrameCompleted (frame);
frame->unref ();
}
