/// <summary>
/// Immediately stop the entire transmission system
/// </summary>
private void StopTransmissionPipeline()
{
//Stop microphone
if (_microphone != null && _microphone.IsRecording)
{
_microphone.StopCapture();
}
//Dispose preprocessor and encoder
if (_preprocessor != null)
{
if (_microphone != null)
{
_microphone.Unsubscribe(_preprocessor);
}
if (_encoder != null)
{
_preprocessor.Unsubscribe(_encoder);
}
_preprocessor.Dispose();
_preprocessor = null;
}
if (_encoder != null)
{
_encoder.Dispose();
_encoder = null;
}
_encoderSubscribed = false;
}
/// <summary>
/// (Re)Start the transmission pipeline, getting to a state where we *can* send voice (but aren't yet)
/// </summary>
private void RestartTransmissionPipeline(string reason)
{
Log.Debug("Restarting transmission pipeline: '{0}'", reason);
StopTransmissionPipeline();
//Clear the flag for requesting an explicit reset.
//We're about to apply a reset so the request will be satisfied.
_pendingResetRequest = false;
//No point starting a transmission pipeline if the network is not a client
if (_network == null || !_network.Mode.IsClientEnabled())
{
return;
}
//Create new mic capture system
var format = _microphone.StartCapture(_micName);
//If we created a mic (can be null if e.g. there is no mic)
if (format != null)
{
//Close and re-open all channels, propogating this restart to the receiving end
_roomChannels.Refresh();
_playerChannels.Refresh();
//Create preprocessor and subscribe it to microphone (webrtc preprocessor always wants audio to drive VAD+AEC)
_preprocessor = CreatePreprocessor(format);
_preprocessor.UpstreamLatency = _microphone.Latency;
_preprocessor.Start();
_microphone.Subscribe(_preprocessor);
//Sub VAD listeners to preprocessor
for (var i = 0; i < _activationListeners.Count; i++)
{
_preprocessor.Subscribe(_activationListeners[i]);
}
//Sub audio listeners to the preprocessor output
for (var i = 0; i < _audioListeners.Count; i++)
{
var al = _audioListeners[i];
al.Reset();
_preprocessor.Subscribe(al);
}
//Create encoder (not yet subscribed to receive audio data, we'll do that later)
Log.AssertAndThrowPossibleBug(_network != null, "5F33336B-15B5-4A85-9B54-54352C74768E", "Network object is unexpectedly null");
_encoder = new EncoderPipeline(_preprocessor.OutputFormat, _codecSettingsLoader.CreateEncoder(), _network);
}
else
{
Log.Warn("Failed to start microphone capture; local voice transmission will be disabled.");
}
}
/// <summary>
/// Immediately stop the entire transmission system
/// </summary>
private void StopTransmissionPipeline()
{
#if !NCRUNCH
Profiler.BeginSample("CapturePipelineManager: StopTransmissionPipeline");
#endif
//Stop microphone
if (_microphone != null && _microphone.IsRecording)
{
_microphone.StopCapture();
}
//Dispose preprocessor and encoder
if (_preprocessor != null)
{
if (_microphone != null)
{
_microphone.Unsubscribe(_preprocessor);
}
if (_encoder != null)
{
_preprocessor.Unsubscribe(_encoder);
}
_preprocessor.Dispose();
_preprocessor = null;
}
if (_encoder != null)
{
_encoder.Dispose();
_encoder = null;
}
_encoderSubscribed = false;
#if !NCRUNCH
Profiler.EndSample();
#endif
}
/// <param name="micName"></param>
/// <param name="source">Source to read frames from</param>
private MicrophoneCapture([CanBeNull] string micName, AudioClip source)
{
if (source == null)
{
throw new ArgumentNullException("source", Log.PossibleBugMessage("capture source clip is null", "333E11A6-8026-41EB-9B34-EF9ADC54B651"));
}
_micName = micName;
_clip = source;
var captureFormat = new WaveFormat(1, source.frequency);
_maxReadBufferPower = (byte)Math.Ceiling(Math.Log(0.1f * source.frequency, 2));
_preprocessing = new WebRtcPreprocessingPipeline(captureFormat);
_preprocessing.Start();
//Ensure we have enough buffer size to contain several input frames to the preprocessor
_rawMicSamples = new BufferedSampleProvider(captureFormat, _preprocessing.InputFrameSize * 4);
_rawMicFrames = new SampleToFrameProvider(_rawMicSamples, (uint)_preprocessing.InputFrameSize);
Log.Info("Began mic capture (SampleRate:{0} FrameSize:{1}, Buffer Limit:2^{2})", captureFormat.SampleRate, _preprocessing.InputFrameSize, _maxReadBufferPower);
}
/// <summary>
/// (Re)Start the transmission pipeline, getting to a state where we *can* send voice (but aren't yet)
/// </summary>
private void RestartTransmissionPipeline(string reason)
{
Log.Debug("Restarting transmission pipeline: '{0}'", reason);
StopTransmissionPipeline();
//If capture has been specifically disabled, exit out of starting it
if (_encounteredFatalException)
{
return;
}
#if !NCRUNCH
Profiler.BeginSample("CapturePipelineManager: RestartTransmissionPipeline");
#endif
try
{
//Clear the flag for requesting an explicit reset.
//We're about to apply a reset so the request will be satisfied.
_pendingResetRequest = false;
//No point starting a transmission pipeline if the network is not a client
if (_network == null || !_network.Mode.IsClientEnabled())
{
return;
}
//Create new mic capture system
var format = _microphone.StartCapture(_micName);
//If we created a mic (can be null if e.g. there is no mic)
if (format != null)
{
//Close and re-open all channels, propogating this restart to the receiving end
_roomChannels.Refresh();
_playerChannels.Refresh();
//Create preprocessor and subscribe it to microphone (webrtc preprocessor always wants audio to drive VAD+AEC)
_preprocessor = CreatePreprocessor(format);
_preprocessor.UpstreamLatency = _microphone.Latency;
_preprocessor.Start();
_microphone.Subscribe(_preprocessor);
//Sub VAD listeners to preprocessor
for (var i = 0; i < _activationListeners.Count; i++)
{
_preprocessor.Subscribe(_activationListeners[i]);
}
//Sub audio listeners to the preprocessor output
for (var i = 0; i < _audioListeners.Count; i++)
{
var al = _audioListeners[i];
al.Reset();
_preprocessor.Subscribe(al);
}
//Create encoder (not yet subscribed to receive audio data, we'll do that later)
Log.AssertAndThrowPossibleBug(_network != null, "5F33336B-15B5-4A85-9B54-54352C74768E", "Network object is unexpectedly null");
_encoder = new EncoderPipeline(_preprocessor.OutputFormat, _codecSettingsLoader.CreateEncoder(), _network);
}
else
{
Log.Warn("Failed to start microphone capture; local voice transmission will be disabled.");
_cannotStartMic = true;
}
}
catch (Exception ex)
{
//We don't know what happened, but something went wrong. As a precaution kill the transmission pipeline (it will be restarted if necessary)
StopTransmissionPipeline();
Log.Error("Unexpected exception encountered starting microphone capture; local voice transmission will be disabled: {0}", ex);
_encounteredFatalException = true;
}
finally
{
#if !NCRUNCH
Profiler.EndSample();
#endif
}
}
