private async Task <PPError> ConfigureAsyncCore(MediaStreamVideoTrackAttributes attributes, MessageLoop messageLoop = null)
{
var tcs = new TaskCompletionSource <PPError>();
EventHandler <PPError> handler = (s, e) => { tcs.TrySetResult(e); };
try
{
HandleConfigure += handler;
if (MessageLoop == null && messageLoop == null)
{
Configure(attributes);
}
else
{
Action <PPError> action = new Action <PPError>((e) =>
{
var result = (PPError)PPBMediaStreamVideoTrack.Configure(this, attributes.ToAttributes(),
new BlockUntilComplete()
);
tcs.TrySetResult(result);
}
);
InvokeHelper(action, messageLoop);
}
return(await tcs.Task);
}
catch (Exception exc)
{
Console.WriteLine(exc.Message);
tcs.SetException(exc);
return(PPError.Aborted);
}
finally
{
HandleConfigure -= handler;
}
}
/// <summary>
/// Configures underlying frame buffers for incoming frames asynchronously.
/// If the application doesn't want to drop frames, then the
/// <code>BufferedFrames</code> should be
/// chosen such that inter-frame processing time variability won't overrun the
/// input buffer. If the buffer is overfilled, then frames will be dropped.
/// The application can detect this by examining the timestamp on returned
/// frames. If some attributes are not specified, default values will be used
/// for those unspecified attributes. If <code>Configure()</code> is not
/// called, default settings will be used.
/// Example usage from plugin code:
/// <code>
/// var attribList = new MediaStreamVideoTrackAttributes()
/// {
/// BufferedFrames = 4
/// };
/// await track.ConfigureAsync(attribList);
/// </code>
/// </summary>
/// <param name="attributes">A MediaStreamVideoTrackAttributes instance</param>
/// <param name="messageLoop">Optional MessageLoop instance used to run the command on.</param>
/// <returns>Error code. Returns <code>InProgress</code> if there is a pending call of
/// <code>Configure()</code> or <code>GetFrame()</code>, or the plugin
/// holds some frames which are not recycled with <code>RecycleFrame()</code>.
/// If an error is returned, all attributes and the underlying buffer will not
/// be changed.</returns>
public Task <PPError> ConfigureAsync(MediaStreamVideoTrackAttributes attributes, MessageLoop messageLoop = null)
=> ConfigureAsyncCore(attributes, messageLoop);
/// <summary>
/// Configures underlying frame buffers for incoming frames.
/// If the application doesn't want to drop frames, then the
/// <code>BufferedFrames</code> should be
/// chosen such that inter-frame processing time variability won't overrun the
/// input buffer. If the buffer is overfilled, then frames will be dropped.
/// The application can detect this by examining the timestamp on returned
/// frames. If some attributes are not specified, default values will be used
/// for those unspecified attributes. If <code>Configure()</code> is not
/// called, default settings will be used.
/// Example usage from plugin code:
/// <code>
/// var attribList = new MediaStreamVideoTrackAttributes()
/// {
/// BufferedFrames = 4
/// };
/// track.Configure(attribList);
/// </code>
/// </summary>
/// <param name="attributes">A MediaStreamVideoTrackAttributes instance</param>
/// <returns>Error code. Returns <code>InProgress</code> if there is a pending call of
/// <code>Configure()</code> or <code>GetFrame()</code>, or the plugin
/// holds some frames which are not recycled with <code>RecycleFrame()</code>.
/// If an error is returned, all attributes and the underlying buffer will not
/// be changed.</returns>
public PPError Configure(MediaStreamVideoTrackAttributes attributes)
=> (PPError)PPBMediaStreamVideoTrack.Configure(this, attributes.ToAttributes(), new CompletionCallback(OnConfigure));