protected virtual void StartNextTest()
{
Deployment.Current.Dispatcher.BeginInvoke(() => Status = string.Format("Executing test for latency {0} and filter length {1}", ExpectedLatency, FilterLength));
mTestStartTime = DateTime.Now;
IAudioFilter playedResampler;
IAudioFilter recordedResampler;
mCancelledFrames = new List <byte[]>();
// Decide whether to synchronize the audio or not.
if (AecIsSynchronized)
{
playedResampler = new ResampleFilter(audioFormat, audioFormat);
recordedResampler = new ResampleFilter(audioFormat, audioFormat);
}
else
{
playedResampler = new NullAudioFilter(audioFormat.BytesPerFrame);
recordedResampler = new NullAudioFilter(audioFormat.BytesPerFrame);
}
// Initialize the echo canceller
playedResampler.InstanceName = "EchoCanceller_played";
recordedResampler.InstanceName = "EchoCanceller_recorded";
mediaConfig.ExpectedAudioLatency = ExpectedLatency;
mediaConfig.FilterLength = FilterLength;
switch (mEchoCancellerType)
{
case EchoCancellerType.Speex2:
mEchoCancelFilter = new SpeexEchoCanceller2(mediaConfig, audioFormat, AudioFormat.Default);
break;
case EchoCancellerType.WebRtc:
mEchoCancelFilter = new WebRtcFilter(mediaConfig.ExpectedAudioLatency,
mediaConfig.FilterLength,
audioFormat,
AudioFormat.Default,
true,
true,
false,
playedResampler, recordedResampler);
break;
case EchoCancellerType.TimeDomain:
mEchoCancelFilter = new TimeDomainEchoCancelFilter(ExpectedLatency, FilterLength, audioFormat, AudioFormat.Default, playedResampler, recordedResampler);
break;
case EchoCancellerType.Speex:
mEchoCancelFilter = new SpeexEchoCancelFilter(ExpectedLatency, FilterLength, audioFormat, AudioFormat.Default, playedResampler, recordedResampler);
break;
default:
throw new Exception();
}
mPlayer = GetPlayer();
mRecorder = GetRecorder();
mRecorder.StartRecording(SpeakerFrames, FinishTest);
mPlayer.StartPlaying(SourceFrames, mRecorder.StopRecording);
}
private void btnPlay_Click(object sender, RoutedEventArgs e)
{
if (btnPlay.Content.ToString() == "Start")
{
try
{
// Setup the parameters.
playedFrameIndex = 0;
int playbackDelay = Int32.Parse(txtPlaybackDelay.Text);
framePlaybackInterval = playbackDelay / 20;
expectedLatency = Int32.Parse(txtExpectedLatency.Text);
filterLength = Int32.Parse(txtTailSize.Text);
IAudioFilter playedResampler;
IAudioFilter recordedResampler;
// Decide whether to synchronize the audio or not.
if (chkSynchronize.IsChecked == true)
{
playedResampler = new ResampleFilter(AudioFormat.Default, AudioFormat.Default);
recordedResampler = new ResampleFilter(AudioFormat.Default, AudioFormat.Default);
}
else
{
playedResampler = new NullAudioFilter(AudioFormat.Default.BytesPerFrame);
recordedResampler = new NullAudioFilter(AudioFormat.Default.BytesPerFrame);
}
// Initialize the echo canceller
playedResampler.InstanceName = "EchoCanceller_played";
recordedResampler.InstanceName = "EchoCanceller_recorded";
echoCanceller = new SpeexEchoCancelFilter(expectedLatency, filterLength, AudioFormat.Default, AudioFormat.Default, playedResampler, recordedResampler);
if (chkPlaySilently.IsChecked == true)
{
PerformEchoCancellation();
return;
}
if (chkPlayWithAEC.IsChecked == true)
{
playbackFunction = GetNextAECFrame;
}
else
{
playbackFunction = GetNextRawFrame;
}
// Start playing the audio.
mediaElement.Play();
btnPlay.Content = "Stop";
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}
else
{
btnPlay.Content = "Start";
mediaElement.Stop();
}
}
