/// <summary>
// Gets a free frame for output. The frame is allocated by
// <code>Configure()</code>. The caller should fill it with frame data, and
// then use |PutFrame()| to send the frame back.
/// </summary>
/// <returns>Error code</returns>
public PPError GetEmptyFrame()
{
var action = new Action <PPError, PPResource>((result, resource) =>
{
OnGetEmptyFrame(new VideoFrameInfo(result, resource));
});
var callback = new CompletionCallbackWithOutput <PPResource>(new CompletionCallbackWithOutputFunc <PPResource>(action));
return((PPError)PPBMediaStreamVideoTrack.GetEmptyFrame(this, out callback.OutputAdapter.output, callback));
}
private async Task <VideoFrameInfo> GetEmptyFrameAsyncCore(MessageLoop messageLoop = null)
{
var tcs = new TaskCompletionSource <VideoFrameInfo>();
EventHandler <VideoFrameInfo> handler = (s, e) => { tcs.TrySetResult(e); };
try
{
HandleEmptyFrame += handler;
if (MessageLoop == null && messageLoop == null)
{
GetFrame();
}
else
{
Action <PPError> action = new Action <PPError>((e) =>
{
var output = new APIArgumentAdapter <PPResource>();
var result = (PPError)PPBMediaStreamVideoTrack.GetEmptyFrame(this, out output.output,
new BlockUntilComplete());
tcs.TrySetResult(new VideoFrameInfo(result, output.Output));
}
);
InvokeHelper(action, messageLoop);
}
return(await tcs.Task);
}
catch (Exception exc)
{
Console.WriteLine(exc.Message);
tcs.SetException(exc);
return(new VideoFrameInfo(PPError.Aborted, PPResource.Empty));
}
finally
{
HandleEmptyFrame -= handler;
}
}
