internal override void OnCompleted(AsyncActionWithProgressCompletedHandler <TProgress> userCompletionHandler, AsyncStatus asyncStatus)
{
Debug.Assert(userCompletionHandler != null);
userCompletionHandler(this, asyncStatus);
}
public static void TrackAsyncAction(IAsyncActionWithProgress <double> action, AsyncActionWithProgressCompletedHandler <double> completed)
{
TrackAsyncAction(action, p => p, completed);
}
public static void TrackAsyncAction <TProgress>(IAsyncActionWithProgress <TProgress> action, Func <TProgress, double> progressConverter, AsyncActionWithProgressCompletedHandler <TProgress> completed)
{
DisableView(null);
action.Completed = (s, e) => root.Dispatcher.Begin(() =>
{
EnableView();
completed(s, e);
});
action.Progress = (s, p) => root.Dispatcher.Begin(() => DisableView(progressConverter(p)));
}
private static async void TranscodeFile(StorageFile srcFile, StorageFile destFile, AsyncActionWithProgressCompletedHandler<double> action, AsyncActionProgressHandler<double> progress )
{
var profile = MediaEncodingProfile.CreateMp3(AudioEncodingQuality.High);
var transcoder = new MediaTranscoder();
var prepareOp = await transcoder.PrepareFileTranscodeAsync(srcFile, destFile, profile);
if (!prepareOp.CanTranscode) return;
var transcodeOp = prepareOp.TranscodeAsync();
transcodeOp.Progress += progress;
transcodeOp.Completed += action;
}