/// <summary>
/// Gets the next audio buffer from the MediaStream track.
/// If internal processing is slower than the incoming buffer rate,
/// new buffers will be dropped from the incoming stream. Once all buffers
/// are full, audio samples will be dropped until <code>RecycleBuffer()</code>
/// is called to free a spot for another buffer.
/// If there are no audio data in the input buffer,
/// <code>CompletionPending</code> will be returned immediately and the
/// <code>HandleBuffer</code> event handler will be called when a new buffer of audio samples
/// is received or some error happens.
/// </summary>
/// <returns>Error code</returns>
public PPError GetBuffer()
{
var action = new Action <PPError, PPResource>(
(result, resource) =>
{
OnGetBuffer(new AudioBufferInfo(result, resource));
}
);
var callback = new CompletionCallbackWithOutput <PPResource>(new CompletionCallbackWithOutputFunc <PPResource>(action));
return((PPError)PPBMediaStreamAudioTrack.GetBuffer(this, out callback.OutputAdapter.output, callback));
}
private async Task <AudioBufferInfo> GetBufferAsyncCore(MessageLoop messageLoop = null)
{
var tcs = new TaskCompletionSource <AudioBufferInfo>();
EventHandler <AudioBufferInfo> handler = (s, e) => { tcs.TrySetResult(e); };
try
{
HandleBuffer += handler;
if (MessageLoop == null && messageLoop == null)
{
GetBuffer();
}
else
{
Action <PPError> action = new Action <PPError>((e) =>
{
var output = new APIArgumentAdapter <PPResource>();
var result = (PPError)PPBMediaStreamAudioTrack.GetBuffer(this, out output.output,
new BlockUntilComplete());
tcs.TrySetResult(new AudioBufferInfo(result, output.Output));
}
);
InvokeHelper(action, messageLoop);
}
return(await tcs.Task);
}
catch (Exception exc)
{
Console.WriteLine(exc.Message);
tcs.SetException(exc);
return(new AudioBufferInfo(PPError.Aborted, PPResource.Empty));
}
finally
{
HandleBuffer -= handler;
}
}
