void iDecoderEvents.onFrameDecoded(DecodedBuffer buffer)
{
lock ( syncRoot )
{
pendingFrames.insert(buffer.timestamp, buffer.bufferIndex);
}
}
void dispatchOutput()
{
Debug.Assert(decoded.anyKernelBuffer);
DecodedBuffer buffer = decoded.dequeue();
eventsSink.onFrameDecoded(buffer);
}
bool waitForVideoFrame(TimeSpan timestamp)
{
timestamp = timestamp.floorToMicro();
Span <pollfd> pollHandles = stackalloc pollfd[4];
DecoderPoll.initHandles(pollHandles, device.file, audioQueue.emptyQueueHandle, seekEventHandle, shutdownEvent);
eDecoderBits decoderBits;
eAudioBits audio;
bool seek, shutdown;
while (true)
{
DecoderPoll.poll(pollHandles, out decoderBits, out audio, out seek, out shutdown);
if (shutdown)
{
return(false);
}
if (seek)
{
throw new ApplicationException("Invalid state transition, seek request while still processing previous one.");
}
if (audio.HasFlag(eAudioBits.FreeBuffer))
{
dispatchAudio();
}
if (decoderBits == eDecoderBits.None)
{
continue;
}
// Logger.logVerbose( "Video decoder poll result: {0}", decoderBits );
if (decoderBits.HasFlag(eDecoderBits.Event))
{
dispatchEvents();
}
if (decoderBits.hasDecodedBits())
{
Debug.Assert(decoded.anyKernelBuffer);
DecodedBuffer buffer = decoded.dequeue();
if (buffer.timestamp != timestamp)
{
if (buffer.timestamp > timestamp)
{
throw new ApplicationException(@"There’s a bug somewhere in this library; time is kept in 64-bit integers and shouldn’t suffer from precision-related issues.");
}
// Logger.logVerbose( "DecoderThread.waitForVideoFrame got {0}, need {1}", buffer.timestamp, timestamp );
// Video starts from a keyframe, very likely need to decode + discard a few frames before getting the one we need.
decoded.enqueue(buffer);
}
else
{
Logger.logVerbose("DecoderThread.waitForVideoFrame got the target {0}", buffer.timestamp);
eventsSink.onFrameDecoded(buffer);
return(true);
}
}
if (decoderBits.hasEncodedBits())
{
dispatchInput();
}
}
}