private async Task <TimeSpan> SeekAsync(TimeSpan position)
{
Debug.WriteLine("SmMediaManager.SeekAsync()");
TimeSpan timeSpan;
if (_playbackCancellationTokenSource.IsCancellationRequested)
{
timeSpan = TimeSpan.MinValue;
}
else
{
try
{
if (IsSeekInRange(position))
{
return(position);
}
else
{
IMediaReader[] readers = _readers;
if (readers == null || readers.Length < 1)
{
return(TimeSpan.MinValue);
}
else
{
await TaskEx.WhenAll(readers.Select(reader => reader.StopAsync())).ConfigureAwait(false);
if (_playbackCancellationTokenSource.IsCancellationRequested)
{
return(TimeSpan.MinValue);
}
else
{
foreach (IMediaReader mediaReader in readers)
{
mediaReader.IsEnabled = true;
}
State = MediaManagerState.Seeking;
TimeSpan actualPosition = await _readerManager.SeekAsync(position, _playbackCancellationTokenSource.Token).ConfigureAwait(false);
StartReaders();
timeSpan = actualPosition;
return(timeSpan);
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine("SmMediaManager.SeekAsync() failed: " + ex.Message);
}
timeSpan = TimeSpan.MinValue;
}
return(timeSpan);
}
public static async Task <TimeSpan> StartAsync(this ISegmentReaderManager segmentManager, CancellationToken cancellationToken)
{
await segmentManager.StartAsync().ConfigureAwait(false);
return(await segmentManager.SeekAsync(TimeSpan.Zero, cancellationToken).ConfigureAwait(false));
}
