private void OpenSource(IWaveSource source)
{
try
{
Stop(); //if playing -> stop playback
_audioSource = source;
_gainSource = new GainSource(source)
{
Gain = (float)this.Gain
};
source = SetupVisualization(_gainSource.ToWaveSource(16));
if (WasapiOut.IsSupportedOnCurrentPlatform) // > Vista
{
_soundOut = new WasapiOut(false, CSCore.CoreAudioAPI.AudioClientShareMode.Shared, 100);
}
else // < Vista
{
_soundOut = new DirectSoundOut()
{
Latency = 100
};
}
_soundOut.Initialize(source);
_soundOut.Stopped += OnPlaybackStopped;
_soundOut.Play();
}
catch (CSCore.CoreAudioAPI.CoreAudioAPIException ex)
{
MessageBox.Show("Unknown CoreAudioAPI-error: 0x" + ex.ErrorCode.ToString("x"), "Error", MessageBoxButton.OK, MessageBoxImage.Error);
Stop();
}
catch (Exception ex)
{
MessageBox.Show("Unknown error: " + ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
Stop();
}
}
private void Stop()
{
Running = false;
if (_soundIn != null)
{
_soundIn.Stop();
_soundIn.Dispose();
_soundIn = null;
}
if (_source != null)
{
_source.Dispose();
_source = null;
}
_disableTimer.Stop();
_volumeTimer.Stop();
_mayStop = false;
}
private void Start()
{
if (_starting)
{
return;
}
Logger.Debug("Starting audio capture for device: {0}", Device?.FriendlyName ?? "default");
_starting = true;
try
{
Stop();
if (Type == MmDeviceType.Input)
{
_soundIn = Device != null
? new WasapiCapture {
Device = Device
}
: new WasapiCapture();
}
else
{
_soundIn = Device != null
? new WasapiLoopbackCapture {
Device = Device
}
: new WasapiLoopbackCapture();
}
_soundIn.Initialize();
var soundInSource = new SoundInSource(_soundIn);
_source = soundInSource.ToSampleSource().AppendSource(x => new GainSource(x), out _volume);
// create a spectrum provider which provides fft data based on some input
_spectrumProvider = new BasicSpectrumProvider(_source.WaveFormat.Channels, _source.WaveFormat.SampleRate,
FftSize);
// the SingleBlockNotificationStream is used to intercept the played samples
var notificationSource = new SingleBlockNotificationStream(_source);
// pass the intercepted samples as input data to the spectrumprovider (which will calculate a fft based on them)
notificationSource.SingleBlockRead += (s, a) => _spectrumProvider.Add(a.Left, a.Right);
var waveSource = notificationSource.ToWaveSource(16);
// We need to read from our source otherwise SingleBlockRead is never called and our spectrum provider is not populated
var buffer = new byte[waveSource.WaveFormat.BytesPerSecond / 2];
soundInSource.DataAvailable += (s, aEvent) =>
{
while (waveSource.Read(buffer, 0, buffer.Length) > 0)
{
}
};
_lineSpectrum = null;
_singleSpectrum = new SingleSpectrum(FftSize, _spectrumProvider);
_mayStop = false;
_disableTimer.Start();
_volumeTimer.Start();
_soundIn.Start();
Running = true;
}
catch (Exception e)
{
Logger.Warn(e, "Failed to start WASAPI audio capture");
}
_starting = false;
}