public int DecodeFrame(Surface output, ReadOnlySpan <byte> bitstream)
{
FFmpegApi.av_frame_unref(output.Frame);
int result;
int gotFrame;
fixed(byte *ptr = bitstream)
{
_packet->Data = ptr;
_packet->Size = bitstream.Length;
result = _decodeFrame(_context, output.Frame, &gotFrame, _packet);
}
if (gotFrame == 0)
{
FFmpegApi.av_frame_unref(output.Frame);
// If the frame was not delivered, it was probably delayed.
// Get the next delayed frame by passing a 0 length packet.
_packet->Data = null;
_packet->Size = 0;
result = _decodeFrame(_context, output.Frame, &gotFrame, _packet);
// We need to set B frames to 0 as we already consumed all delayed frames.
// This prevents the decoder from trying to return a delayed frame next time.
_context->HasBFrames = 0;
}
FFmpegApi.av_packet_unref(_packet);
if (gotFrame == 0)
{
FFmpegApi.av_frame_unref(output.Frame);
return(-1);
}
return(result < 0 ? result : 0);
}
public void Dispose()
{
FFmpegApi.av_frame_unref(Frame);
FFmpegApi.av_free(Frame);
}