int EchoCancellationImpl::ProcessRenderAudio(const AudioBuffer* audio) {
if (!is_component_enabled()) {
return apm_->kNoError;
}
assert(audio->samples_per_split_channel() <= 160);
assert(audio->num_channels() == apm_->num_reverse_channels());
int err = apm_->kNoError;
// The ordering convention must be followed to pass to the correct AEC.
size_t handle_index = 0;
for (int i = 0; i < apm_->num_output_channels(); i++) {
for (int j = 0; j < audio->num_channels(); j++) {
Handle* my_handle = static_cast<Handle*>(handle(handle_index));
err = WebRtcAec_BufferFarend(
my_handle,
audio->low_pass_split_data(j),
static_cast<WebRtc_Word16>(audio->samples_per_split_channel()));
if (err != apm_->kNoError) {
return GetHandleError(my_handle); // TODO(ajm): warning possible?
}
handle_index++;
}
}
return apm_->kNoError;
}
int speex_aec_playback_for_async(int16_t* farend, float snd_amplification)
{
int ret_val = -1;
switch(aec_core_used)
{
#ifdef WEBRTC_AEC_CORE_ENABLED
case WEBRTC_AEC:
if(webrtc_aec_pty.webrtc_aec)
ret_val = WebRtcAec_BufferFarend(webrtc_aec_pty.webrtc_aec, farend, webrtc_aec_pty.frame_size);
break;
case WEBRTC_AECM:
if(webrtc_aecm_pty.webrtc_aec)
ret_val = WebRtcAecm_BufferFarend(webrtc_aecm_pty.webrtc_aec, farend, webrtc_aecm_pty.frame_size);
break;
#endif
case SPEEX_AEC:
default:
if(speex_aec_pty.speex_echo_state)
{
speex_echo_playback((SpeexEchoState*)speex_aec_pty.speex_echo_state, farend);
// speex_preprocess_run((SpeexPreprocessState*)speex_aec_pty.speex_preprocess_state_tmp, farend);
ret_val = 0;
}
break;
}
if(snd_amplification != 1.0f && snd_amplification > 0)
{
for(int i=0; i<speex_aec_pty.frame_size; ++i)
farend[i] = farend[i]*snd_amplification;
}
return ret_val;
}
int pass_audio_output(Filter_Audio *f_a, const int16_t *data, unsigned int samples)
{
if (!f_a || (!f_a->echo_enabled && !f_a->gain_enabled)) {
return -1;
}
unsigned int nsx_samples = f_a->fs / 100;
if (!samples || (samples % nsx_samples) != 0) {
return -1;
}
_Bool resample = 0;
unsigned int resampled_samples = 0;
if (f_a->fs != 16000) {
samples = (samples / nsx_samples) * 160;
nsx_samples = 160;
resample = 1;
}
unsigned int temp_samples = samples;
float *d_f = (float *)STACK_ALLOC( nsx_samples * sizeof(float) + nsx_samples * sizeof(int16_t) );
while (temp_samples) {
if (resample) {
int16_t *d = (int16_t *)(d_f + nsx_samples);
downsample_audio_echo_in(f_a, d, data + resampled_samples);
if (WebRtcAgc_AddFarend(f_a->gain_control, d, nsx_samples) == -1)
return -1;
S16ToFloatS16(d, nsx_samples, d_f);
resampled_samples += f_a->fs / 100;
} else {
S16ToFloatS16(data + (samples - temp_samples), nsx_samples, d_f);
}
if (WebRtcAec_BufferFarend(f_a->echo_cancellation, d_f, nsx_samples) == -1) {
return -1;
}
temp_samples -= nsx_samples;
}
return 0;
}
int KotiAEC_process(const int16_t* farend, const int16_t* nearend, int16_t* out)
{
int ret = -1, i = 0, frame_size = 0;
switch(aec_core_used)
{
#ifdef WEBRTC_AEC_CORE_ENABLED
case WEBRTC_AEC:
if(farend)
WebRtcAec_BufferFarend(webrtc_aec_pty.webrtc_aec, farend, webrtc_aec_pty.frame_size);
if(!WebRtcAec_Process(webrtc_aec_pty.webrtc_aec, nearend, NULL, out, NULL, webrtc_aec_pty.frame_size,
webrtc_aec_pty.sndcard_delay_ms, 0))
{
ret = 0;
}
if(webrtc_aec_pty.webrtc_ns)
{
WebRtcNsx_Process((NsxHandle*)webrtc_aec_pty.webrtc_ns, out, NULL, out, NULL);
if(webrtc_aec_pty.frame_size == 160)
WebRtcNsx_Process((NsxHandle*)webrtc_aec_pty.webrtc_ns, out+80, NULL, out+80, NULL);
}
if(webrtc_aec_pty.webrtc_agc)
{
int32_t out_c; uint8_t warn_status;
WebRtcAgc_Process(webrtc_aec_pty.webrtc_agc, out, NULL, webrtc_aec_pty.frame_size, out, NULL, 32,
&out_c, 1, &warn_status);
}
// if(webrtc_aec_pty.webrtc_ns)
// {
// WebRtcNsx_Process((NsxHandle*)webrtc_aec_pty.webrtc_ns, out, NULL, out, NULL);
// if(webrtc_aec_pty.frame_size == 160)
// WebRtcNsx_Process((NsxHandle*)webrtc_aec_pty.webrtc_ns, out+80, NULL, out+80, NULL);
// }
frame_size = webrtc_aec_pty.frame_size;
break;
case WEBRTC_AECM:
/*
if(farend)
WebRtcAecm_BufferFarend(webrtc_aecm_pty.webrtc_aec, farend, webrtc_aecm_pty.frame_size);
if(!WebRtcAecm_Process(webrtc_aecm_pty.webrtc_aec, nearend, NULL, out, webrtc_aecm_pty.frame_size,
webrtc_aecm_pty.sndcard_delay_ms))
{
ret = 0;
}
*/
memcpy(proc_tmp_buf, nearend, webrtc_aecm_pty.frame_size*2);
if(webrtc_aecm_pty.webrtc_ns)
{
WebRtcNsx_Process((NsxHandle*)webrtc_aecm_pty.webrtc_ns, proc_tmp_buf, NULL, proc_tmp_buf, NULL);
if(webrtc_aecm_pty.frame_size == 160)
WebRtcNsx_Process((NsxHandle*)webrtc_aecm_pty.webrtc_ns, proc_tmp_buf+80, NULL, proc_tmp_buf+80, NULL);
}
if(webrtc_aecm_pty.webrtc_agc)
{
int32_t out_c; uint8_t warn_status;
WebRtcAgc_Process(webrtc_aecm_pty.webrtc_agc, proc_tmp_buf, NULL, webrtc_aecm_pty.frame_size, proc_tmp_buf, NULL, 32,
&out_c, 1, &warn_status);
}
// AEC
if(farend)
WebRtcAecm_BufferFarend(webrtc_aecm_pty.webrtc_aec, farend, webrtc_aecm_pty.frame_size);
if(!WebRtcAecm_Process(webrtc_aecm_pty.webrtc_aec, proc_tmp_buf, NULL, out, webrtc_aecm_pty.frame_size,
webrtc_aecm_pty.sndcard_delay_ms))
{
ret = 0;
}
frame_size = webrtc_aecm_pty.frame_size;
break;
#endif
case SPEEX_AEC:
default:
#ifdef OLD_SPEEX_AEC
speex_echo_cancel((SpeexEchoState*)speex_aec_pty.speex_echo_state, nearend, farend, out, speex_aec_pty.nosie);
if(speex_preprocess((SpeexPreprocessState*)speex_aec_pty.speex_preprocess_state, out, speex_aec_pty.nosie) == 1)
ret = 0;
#else
if(farend)
speex_echo_cancellation((SpeexEchoState*)speex_aec_pty.speex_echo_state, nearend, farend, out);
else
speex_echo_capture((SpeexEchoState*)speex_aec_pty.speex_echo_state, nearend, out);
// speex_preprocess_estimate_update((SpeexPreprocessState*)speex_aec_pty.speex_preprocess_state, out);
if(speex_preprocess_run((SpeexPreprocessState*)speex_aec_pty.speex_preprocess_state, out) == 1)
ret = 0;
#endif
frame_size = speex_aec_pty.frame_size;
break;
}
// if the output sound needed amplify
if(output_sound_amplification != 1.0f && output_sound_amplification > 0)
{
for(; i<frame_size; ++i)
out[i] = out[i]*output_sound_amplification;
}
return ret;
}
