private void PlaybackProc(object playbackStartedEventWaithandle)
{
try
{
int bufferSize;
int frameSize;
byte[] buffer;
int eventWaitHandleIndex;
WaitHandle[] eventWaitHandleArray;
bufferSize = _audioClient.BufferSize;
frameSize = _outputFormat.Channels * _outputFormat.BytesPerSample;
buffer = new byte[bufferSize * frameSize];
eventWaitHandleIndex = WaitHandle.WaitTimeout;
eventWaitHandleArray = new WaitHandle[] { _eventWaitHandle };
//001
/*if (!FeedBuffer(_renderClient, buffer, bufferSize, frameSize)) //todo: might cause a deadlock: play() is waiting on eventhandle but FeedBuffer got already called
* {
* _playbackState = PlaybackState.Stopped;
* if (playbackStartedEventWaithandle is EventWaitHandle)
* {
* ((EventWaitHandle)playbackStartedEventWaithandle).Set();
* playbackStartedEventWaithandle = null;
* }
* }
* else
* {*/
_audioClient.Start();
_playbackState = SoundOut.PlaybackState.Playing;
if (playbackStartedEventWaithandle is EventWaitHandle)
{
((EventWaitHandle)playbackStartedEventWaithandle).Set();
playbackStartedEventWaithandle = null;
}
while (PlaybackState != PlaybackState.Stopped)
{
if (_eventSync) //based on the "RenderSharedEventDriven"-Sample: http://msdn.microsoft.com/en-us/library/dd940520(v=vs.85).aspx
{
eventWaitHandleIndex = WaitHandle.WaitAny(eventWaitHandleArray, 3 * _latency, false);
//3 * latency = see msdn: recommended timeout
if (eventWaitHandleIndex == WaitHandle.WaitTimeout)
{
continue;
}
}
else //based on the "RenderSharedTimerDriven"-Sample: http://msdn.microsoft.com/en-us/library/dd940521(v=vs.85).aspx
{
Thread.Sleep(_latency / 8);
}
if (PlaybackState == PlaybackState.Playing)
{
int padding;
if (_eventSync && _shareMode == AudioClientShareMode.Exclusive)
{
padding = 0;
}
else
{
padding = _audioClient.GetCurrentPadding();
}
int framesReadyToFill = bufferSize - padding;
if (framesReadyToFill > 5 &&
!(_source is DmoResampler &&
((DmoResampler)_source).OutputToInput(framesReadyToFill * frameSize) <= 0)) //avoid conversion errors
{
if (!FeedBuffer(_renderClient, buffer, framesReadyToFill, frameSize))
{
_playbackState = PlaybackState.Stopped; //TODO: Fire Stopped-event here?
}
}
}
}
Thread.Sleep(_latency / 2);
_audioClient.Stop();
_audioClient.Reset();
//}
}
finally
{
//CleanupResources();
if (playbackStartedEventWaithandle is EventWaitHandle)
{
((EventWaitHandle)playbackStartedEventWaithandle).Set();
}
RaiseStopped();
}
}
