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InputStream reads should wait until data is available.

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This commit is contained in:
RogueException
2017-04-01 13:13:20 -03:00
parent 5229ddb579
commit 909127d330
3 changed files with 21 additions and 17 deletions
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33
src/Discord.Net.WebSocket/Audio/Streams/InputStream.cs
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@@ -8,7 +8,10 @@ namespace Discord.Audio.Streams
///<summary> Reads the payload from an RTP frame </summary>
public class InputStream : AudioInStream
{
private const int MaxFrames = 100;
private ConcurrentQueue<RTPFrame> _frames;
private SemaphoreSlim _signal;
private ushort _nextSeq;
private uint _nextTimestamp;
private bool _hasHeader;
@@ -21,28 +24,27 @@ namespace Discord.Audio.Streams
public InputStream()
{
_frames = new ConcurrentQueue<RTPFrame>();
_signal = new SemaphoreSlim(0, MaxFrames);
}
public override Task<RTPFrame?> ReadFrameAsync(CancellationToken cancelToken)
public override async Task<RTPFrame> ReadFrameAsync(CancellationToken cancelToken)
{
cancelToken.ThrowIfCancellationRequested();
if (_frames.TryDequeue(out var frame))
return Task.FromResult<RTPFrame?>(frame);
return Task.FromResult<RTPFrame?>(null);
RTPFrame frame;
await _signal.WaitAsync(cancelToken).ConfigureAwait(false);
_frames.TryDequeue(out frame);
return frame;
}
public override Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancelToken)
public override async Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancelToken)
{
cancelToken.ThrowIfCancellationRequested();
if (_frames.TryDequeue(out var frame))
{
if (count < frame.Payload.Length)
throw new InvalidOperationException("Buffer is too small.");
Buffer.BlockCopy(frame.Payload, 0, buffer, offset, frame.Payload.Length);
return Task.FromResult(frame.Payload.Length);
}
return Task.FromResult(0);
var frame = await ReadFrameAsync(cancelToken).ConfigureAwait(false);
if (count < frame.Payload.Length)
throw new InvalidOperationException("Buffer is too small.");
Buffer.BlockCopy(frame.Payload, 0, buffer, offset, frame.Payload.Length);
return frame.Payload.Length;
}
public void WriteHeader(ushort seq, uint timestamp)
@@ -57,7 +59,7 @@ namespace Discord.Audio.Streams
{
cancelToken.ThrowIfCancellationRequested();
if (_frames.Count > 100) //1-2 seconds
if (_frames.Count > MaxFrames) //1-2 seconds
{
_hasHeader = false;
return Task.Delay(0); //Buffer overloaded
@@ -72,6 +74,7 @@ namespace Discord.Audio.Streams
timestamp: _nextTimestamp,
payload: payload
));
_signal.Release();
_hasHeader = false;
return Task.Delay(0);
}