public void CanFadeOut()
{
var source = new TestSampleProvider(10, 1); // 10 samples per second
source.UseConstValue = true;
source.ConstValue = 100;
var fade = new FadeInOutSampleProvider(source);
fade.BeginFadeOut(1000);
float[] buffer = new float[20];
int read = fade.Read(buffer, 0, 20);
Assert.AreEqual(20, read);
Assert.AreEqual(100, buffer[0]); // start of fade-out
Assert.AreEqual(50, buffer[5]); // half-way
Assert.AreEqual(0, buffer[10]); // fully fade out
Assert.AreEqual(0, buffer[15]); // fully fade out
}
private void _play()
{
/* Audio chain */
// Sampling
_wavesampler = new WaveToSampleProvider(new Wave16ToFloatProvider(_wavebuffer));
// Fading component
_fade = new FadeInOutSampleProvider(_wavesampler);
_fade.BeginFadeIn(1500);
// Notifying component
var _notify = new NotifyingSampleProvider(_fade);
_notify.Sample += new EventHandler<SampleEventArgs>(_notify_Sample);
// Gain adjustment component
_volume = new VolumeSampleProvider(_notify);
_volume.Volume = this.Volume;
// Output
Output.Init(new SampleToWaveProvider16(_volume));
/* Playback loop */
do
{
if (_cancel_play.IsCancellationRequested)
{
Console.WriteLine("[Playback thread] Cancellation requested.");
// Fade out and stop
Console.WriteLine("[Playback thread] Fading out and stopping...");
_fade.BeginFadeOut(500);
Thread.Sleep(500);
Output.Stop();
Console.WriteLine("[Playback thread] Output stopped.");
this.Status = StreamStatus.Stopped;
Console.WriteLine("[Playback thread] Acknowledged as status.");
//_cancel_play_token.ThrowIfCancellationRequested();
//Console.WriteLine("[Playback thread] WARNING: Cancellation token is not cleanly set!");
return;
}
if (Output.PlaybackState != PlaybackState.Playing && _wavebuffer.BufferedDuration.TotalMilliseconds > 2750)
{
// Buffer is filled enough
Console.WriteLine("[Playback thread] Buffer is okay now, start playback!");
this.Status = StreamStatus.Playing;
Output.Play();
}
else if (Output.PlaybackState == PlaybackState.Playing && _wavebuffer.BufferedDuration.TotalMilliseconds < 2250)
{
// Buffer is underrunning
Console.WriteLine("[Playback thread] Buffer is underrunning, pausing playback...");
this.Status = StreamStatus.Buffering;
Output.Pause();
}
if (_bufferThread.Exception != null)
{
Console.WriteLine("[Playback thread] Buffering thread is faulted, aborting playback");
throw new Exception("Buffering thread faulted, aborting playback");
}
Thread.Sleep(100);
}
while (true);
}