async void MSS_SampleRequested(Windows.Media.Core.MediaStreamSource sender, MediaStreamSourceSampleRequestedEventArgs args)
{
MediaStreamSourceSampleRequest request = args.Request;
// check if the sample requested byte offset is within the file size
if (byteOffset + sampleSize <= mssStream.Size)
{
MediaStreamSourceSampleRequestDeferral deferal = request.GetDeferral();
IInputStream inputStream = mssStream.GetInputStreamAt(byteOffset);
// create the MediaStreamSample and assign to the request object.
// You could also create the MediaStreamSample using createFromBuffer(...)
MediaStreamSample sample = await MediaStreamSample.CreateFromStreamAsync(inputStream, sampleSize, timeOffset);
sample.Duration = sampleDuration;
sample.KeyFrame = true;
// increment the time and byte offset
byteOffset += sampleSize;
timeOffset = timeOffset.Add(sampleDuration);
request.Sample = sample;
deferal.Complete();
}
}
public override void GetSampleAsync(MediaStreamType mediaStreamType)
{
Task.Run(() =>
{
MediaStreamSample sample;
try
{
IBuffer winrtbuf = System.Runtime.InteropServices.WindowsRuntime.WindowsRuntimeBuffer.Create(_pSample, 0, _pSample.Length, _pSample.Length);
sample = new MediaStreamSample(null, winrtbuf, 0, _pSample.Length, nextTimestamp, SampleDuration, null);
nextTimestamp += SampleDuration;
}
catch (Exception e)
{
ErrorOccurred(e.Message);
return;
}
ReportGetSampleCompleted(sample);
});
}
protected override void GetSampleAsync(MediaStreamType mediaStreamType)
{
Mp3Frame frame;
MediaStreamSample sample;
Dictionary <MediaSampleAttributeKeys, string> attribs = new Dictionary <MediaSampleAttributeKeys, string> ();
//string format = "HH:mm:ss.ffff";
//if (opened == DateTime.MinValue)
// opened = DateTime.Now;
//Debug.WriteLine ("{0} GetSampleAsync stamp: {1}", (DateTime.Now - opened).ToString (), TimeSpan.FromMilliseconds (current_pts / 10000).ToString ());
try {
if (this.frame != null)
{
frame = this.frame;
this.frame = null;
}
else
{
frame = Mp3Frame.Read(stream);
}
sample = new MediaStreamSample(description, new MemoryStream(frame.data), 0, frame.data.Length, current_pts, attribs);
current_pts += frame.Duration;
ReportGetSampleCompleted(sample);
} catch (System.IO.EndOfStreamException ex) {
Console.WriteLine(ex);
sample = new MediaStreamSample(description, null, 0, 0, 0, attribs);
ReportGetSampleCompleted(sample);
} catch (Exception ex) {
Console.WriteLine(ex);
ReportGetSampleCompleted(null);
}
}
//
// Summary:
// Developers call this method in response to System.Windows.Media.MediaStreamSource.GetSampleAsync(System.Windows.Media.MediaStreamType)
// to give the System.Windows.Controls.MediaElement the next media sample to
// be rendered, or to report the end of a stream.
//
// Parameters:
// mediaStreamSample:
// The description of the media stream that this sample came from. Passing nullSystem.Windows.Media.MediaStreamSample
// object indicates that the stream has ended.
protected void ReportGetSampleCompleted(MediaStreamSample mediaStreamSample)
{
_service.ReportGetSampleCompleted(mediaStreamSample.InnerSample);
}
