void audioRefreshTimer_Tick(Object sender, EventArgs e)
{
restartaudio:
double actualDelay = 0.04;
if (!videoDecoder.HasVideo)
{
updateObservableVariables();
}
// returns null when framequeue is paused or closed
VideoLib.AudioFrame audioFrame = videoDecoder.FrameQueue.getDecodedAudioFrame();
if (audioFrame == null)
{
// stop audio if playing
audioPlayer.stop();
if (VideoState == VideoState.CLOSED)
{
audioPlayer.flush();
return;
}
// when paused spin idle
}
else
{
if (audioPlayer.Status == SharpDX.DirectSound.BufferStatus.None)
{
// reset audio frame timer before (re)starting playing
audioFrameTimer = videoFrameTimer = HRTimer.getTimestamp();
}
audioPts = audioFrame.Pts;
audioDts = audioFrame.Dts;
// if the audio is lagging behind too much, skip the buffer completely
double diff = getVideoClock() - audioFrame.Pts;
if (diff > 0.2 && diff < 3 && syncMode == SyncMode.AUDIO_SYNCS_TO_VIDEO)
{
//log.Warn("dropping audio buffer, lagging behind: " + (getVideoClock() - audioFrame.Pts).ToString() + " seconds");
goto restartaudio;
}
//adjustAudioSamplesPerSecond(audioFrame);
adjustAudioLength(audioFrame);
audioPlayer.play(audioFrame);
int frameLength = audioFrame.Length;
actualDelay = synchronizeAudio(frameLength);
if (actualDelay < 0)
{
// delay too small, play next frame as quickly as possible
goto restartaudio;
}
}
// start timer with delay for next frame
audioRefreshTimer.Interval = (int)(actualDelay * 1000 + 0.5);
audioRefreshTimer.start();
}
