public void InitAEC()
{
lock (this)
{
if (disposed)
{
return;
}
playFramer = new Voice.Framer <float>(frameSamples * playSamplingRate / samplingRate * playChannels);
InitPlayDelay(AECPlaybackDelayMs);
int filterLength = samplingRate * AECFilterLengthMs / 1000;
DestroyEchoState();
stEcho = speex_echo_state_init_mc(frameSamples, filterLength, channels, playChannels);
speex_echo_ctl(stEcho, SPEEX_ECHO_SET_SAMPLING_RATE, ref samplingRate);
speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_ECHO_STATE, stEcho);
logger.LogInfo("SpeexProcessor AEC: create sampling rate {0}, frame samples {1}, filter length {2}ms={3}frames, mic channels {4}, out channels {5}, playback delay {6}ms={7}:{8}frames", samplingRate, frameSamples, AECFilterLengthMs, filterLength, channels, playChannels, AECPlaybackDelayMs, playDelayFrames, playDelayMaxFrames);
logger.LogInfo("SpeexProcessor AEC: output sampling rate {0}", playSamplingRate);
if (playSamplingRate != samplingRate)
{
logger.LogWarning("SpeexProcessor AEC: output sampling rate {0} != {1} capture sampling rate. For better AEC, set audio source (microphone) and audio output samping rates to the same value.", playSamplingRate, samplingRate);
}
}
}
private void InitReverseStream()
{
lock (this)
{
if (!aecInited)
{
if (disposed)
{
return;
}
int size = processFrameSize * reverseSamplingRate / samplingRate * reverseChannels;
reverseFramer = new Voice.Framer <float>(size);
reverseBuf = new short[processFrameSize * reverseChannels / channels]; // should match direct stream
if (reverseSamplingRate != samplingRate)
{
logger.LogWarning("WebRTCAudioProcessor AEC: output sampling rate {0} != {1} capture sampling rate. For better AEC, set audio source (microphone) and audio output samping rates to the same value.", reverseSamplingRate, samplingRate);
}
aecInited = true;
}
}
}
