async void MSS_Starting(Windows.Media.Core.MediaStreamSource sender, MediaStreamSourceStartingEventArgs args)
{
MediaStreamSourceStartingRequest request = args.Request;
if ((request.StartPosition != null) && request.StartPosition.Value <= MSS.Duration)
{
UInt64 sampleOffset = (UInt64)request.StartPosition.Value.Ticks / (UInt64)sampleDuration.Ticks;
timeOffset = new TimeSpan((long)sampleOffset * sampleDuration.Ticks);
byteOffset = sampleOffset * sampleSize;
}
// create the RandomAccessStream for the input file for the first time
if (mssStream == null)
{
MediaStreamSourceStartingRequestDeferral deferal = request.GetDeferral();
try
{
mssStream = await inputMP3File.OpenAsync(FileAccessMode.Read);
request.SetActualStartPosition(timeOffset);
deferal.Complete();
}
catch (Exception)
{
MSS.NotifyError(MediaStreamSourceErrorStatus.FailedToOpenFile);
deferal.Complete();
}
}
else
{
request.SetActualStartPosition(timeOffset);
}
}
public void Start(MediaStreamSourceStartingRequest request)
{
lock ( m_lock )
{
Debug.Assert(m_state == State.Created);
m_startRequest = request;
m_startRequestCompletion = request.GetDeferral();
m_state = State.Started;
m_session.StartCapture();
}
}
void mkvStreamSource_Starting(MediaStreamSource sender, MediaStreamSourceStartingEventArgs args)
{
MediaStreamSourceStartingRequest request = args.Request;
if (request.StartPosition.HasValue && sender.CanSeek)
{
var deferal = request.GetDeferral();
var mkvFs = mediaStreamFileSource as CCPlayer.HWCodecs.Matroska.MKV.MKVFileSource;
if (mkvFs != null)
{
var newTime = mkvFs.Seek((ulong)request.StartPosition.Value.Ticks / 10000);
request.SetActualStartPosition(newTime);
}
deferal.Complete();
}
}
private void flvStreamSource_Starting(MediaStreamSource sender, MediaStreamSourceStartingEventArgs args)
{
MediaStreamSourceStartingRequest request = args.Request;
if (request.StartPosition.HasValue && sender.CanSeek)
{
var deferal = request.GetDeferral();
var flvFile = mediaStreamFileSource as FlvFile;
if (flvFile != null)
{
var newTime = SeekForFlv(flvFile, (long)(request.StartPosition.Value.TotalMilliseconds * 10000));
request.SetActualStartPosition(TimeSpan.FromTicks(newTime));
}
deferal.Complete();
}
}