AEC not working in windows

[Daniel Dantas]

Hi,

I created a class to handle aec using WebRTC library but somehow it is not working. 

When using my class implementation I can clearly hear my voice in the farend signal.

Please let me know if I am doing something obviously wrong or point me to an example that works...

Please help me, I spent the last 30 days trying to figure it out, but no luck...

My code is pasted below.

This is my last resort...

Thanks a lot,

Daniel

bool WebRTCAEC::init(uint32_t aecDspFreq, uint32_t aecDspChannels, uint32_t soundCardFreq)

{

    if (m_aecCtx || m_nsCtx)

    {

        uninit();

    }

    m_nsCtx = WebRtcNs_Create();

    if (WebRtcNs_Init(m_nsCtx, aecDspFreq) < 0)

    {

        LOG_ERROR("WebRTCAEC", "init : WebRtcWrapperNs_Init failed");

        return false;

    }

    if (WebRtcNs_set_policy(m_nsCtx, 2) < 0)

    {

        LOG_ERROR("WebRTCAEC", "init : WebRtcWrapperNs_set_policy failed");

        return false;

    }

    m_aecCtx = WebRtcAec_Create();

    if (!m_aecCtx)

    {

        LOG_ERROR("WebRTCAEC", "init : WebRtcAec_Create failed");

        return false;

    }

    m_auxBuf  = new Buffer();

    m_auxBuf2 = new Buffer();

    void * aecCore = WebRtcAec_aec_core(m_aecCtx);

    if (!aecCore)

    {

        LOG_ERROR("WebRTCAEC", "init : WebRtcAec_aec_core failed (aecDspFreq: %u, soundCardFreq: %u)", aecDspFreq, soundCardFreq);

        return false;

    }

    WebRtcAec_enable_delay_agnostic(aecCore, true);

    WebRtcAec_enable_refined_adaptive_filter(aecCore, true);

    WebRtcAec_enable_extended_filter(aecCore, true);

    if (WebRtcAec_Init(m_aecCtx, aecDspFreq, soundCardFreq) < 0)

    {

        LOG_ERROR("WebRTCAEC", "init : could not initialize aec engine (aecDspFreq: %u, soundCardFreq: %u)",

            aecDspFreq, soundCardFreq);

        return false;

    }

    webrtc::AecConfig aec_config;

    aec_config.nlpMode = webrtc::kAecNlpAggressive;

    aec_config.skewMode = 0;

    aec_config.metricsMode = 0;

    aec_config.delay_logging = 0;

    if (WebRtcAec_set_config(m_aecCtx, &aec_config) != 0)

    {

        LOG_ERROR("WebRTCAEC", "init : WebRtcWrapperAec_set_config failed",

            aecDspFreq, soundCardFreq);

        return false;

    }

    m_fmt.SetFormat(sizeof(float), aecDspFreq, aecDspChannels);

    m_fmt.SetSampleFormat(AUDIO_SAMPLE_FMT_FLT);

    return true;

}

bool WebRTCAEC::cancelEcho(const float * nearend, const float * farend, float * result, uint32_t samples)

{

    if (!m_aecCtx)

    {

        LOG_ERROR("WebRTCAEC", "cancelEcho : not initialized");

        return false;

    }

    if (!nearend || !farend || !result || !samples)

    {

        LOG_ERROR("WebRTCAEC", "cancelEcho : nearend/farend/samples not set");

        return false;

    }

    int32_t ret = WebRtcAec_BufferFarend(m_aecCtx, farend, samples);

    if (ret != 0)

    {

        LOG_ERROR("WebRTCAEC", "cancelEcho : WebRtcWrapperAec_BufferFarend failed (ret: %d)", ret);

        return false;

    }

    uint32_t floatAudioChunkSize = m_fmt.FramesToBytes(samples);

    m_auxBuf->alloc(floatAudioChunkSize);

    m_auxBuf2->alloc(floatAudioChunkSize);

    float * aecFreePtr = (float *)m_auxBuf->getDataPtr();

    uint32_t soundCardDelayMs = 0;

    uint32_t skew = 0;

    ret = WebRtcAec_Process(m_aecCtx, &nearend, 1, &aecFreePtr, samples, soundCardDelayMs, skew);

    if (ret != 0)

    {

        LOG_ERROR("WebRTCAEC", "cancelEcho : WebRtcWrapperAec_Process failed (ret: %d)", ret);

        return false;

    }

    float * noiseFreePtr = (float *)m_auxBuf2->getDataPtr();

    WebRtcNs_Process(m_nsCtx, &aecFreePtr, 1, &noiseFreePtr);

    memcpy(result, noiseFreePtr, floatAudioChunkSize);

    return true;

}