private void _onPlaybackErrorChanged_SignalRaised(ISignal sender, IList <object> args)
{
OnPlaybackError?.Invoke(this, new PlaybackErrorEventArgs(args));
}
private static void StreamMp3(object state)
{
FullyDownloaded = false;
var url = (Uri)state;
_webRequest = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse resp;
try
{
resp = (HttpWebResponse)_webRequest.GetResponse();
}
catch (WebException e)
{
OnPlaybackError?.Invoke(_webRequest, e);
return;
}
var buffer = new byte[16384 * 4]; // needs to be big enough to hold a decompressed frame
IMp3FrameDecompressor decompressor = null;
try
{
using (var responseStream = resp.GetResponseStream())
{
var readFullyStream = new ReadFullyStream(responseStream);
do
{
if (IsBufferNearlyFull)
{
//Debug.WriteLine("Buffer getting full, taking a break");
Thread.Sleep(500);
continue;
}
Mp3Frame frame;
try
{
frame = Mp3Frame.LoadFromStream(readFullyStream);
}
catch (EndOfStreamException)
{
FullyDownloaded = true;
// reached the end of the MP3 file / stream
break;
}
catch (WebException)
{
// probably we have aborted download from the GUI thread
break;
}
if (decompressor == null)
{
// don't think these details matter too much - just help ACM select the right codec
// however, the buffered provider doesn't know what sample rate it is working at
// until we have a frame
decompressor = CreateFrameDecompressor(frame);
_bufferedWaveProvider = new BufferedWaveProvider(decompressor.OutputFormat)
{
BufferDuration = TimeSpan.FromSeconds(60)
};
// allow us to get well ahead of ourselves
//this._bufferedWaveProvider.BufferedDuration = 250;
}
if (frame == null)
{
FullyDownloaded = true;
break;
}
int decompressed = decompressor.DecompressFrame(frame, buffer, 0);
//Debug.WriteLine(String.Format("Decompressed a frame {0}", decompressed));
_bufferedWaveProvider.AddSamples(buffer, 0, decompressed);
} while (PlaybackState != StreamingPlaybackState.Stopped);
// was doing this in a finally block, but for some reason
// we are hanging on response stream .Dispose so never get there
decompressor?.Dispose();
}
}
finally
{
decompressor?.Dispose();
}
}
