static void speex_ec_preprocess(MSFilter *f) {
SpeexECState *s=(SpeexECState*)f->data;
int delay_samples=0;
mblk_t *m;
s->echostarted=FALSE;
s->filterlength=(s->tail_length_ms*s->samplerate)/1000;
s->framesize=adjust_framesize(s->framesize_at_8000,s->samplerate);
delay_samples=s->delay_ms*s->samplerate/1000;
ms_message("Initializing speex echo canceler with framesize=%i, filterlength=%i, delay_samples=%i",
s->framesize,s->filterlength,delay_samples);
s->ecstate=speex_echo_state_init(s->framesize,s->filterlength);
s->den = speex_preprocess_state_init(s->framesize, s->samplerate);
speex_echo_ctl(s->ecstate, SPEEX_ECHO_SET_SAMPLING_RATE, &s->samplerate);
speex_preprocess_ctl(s->den, SPEEX_PREPROCESS_SET_ECHO_STATE, s->ecstate);
/* fill with zeroes for the time of the delay*/
m=allocb(delay_samples*2,0);
m->b_wptr+=delay_samples*2;
ms_bufferizer_put (&s->delayed_ref,m);
s->min_ref_samples=-1;
s->nominal_ref_samples=delay_samples;
ms_audio_flow_controller_init(&s->afc);
s->flow_control_time = f->ticker->time;
#ifdef SPEEX_ECHO_GET_BLOB
apply_config(s);
#else
if (s->state_str) ms_warning("This version of speex doesn't support echo canceller restoration state. Rebuild speex and mediatreamer2 if you want to use this feature.");
#endif
}
static void webrtc_aec_preprocess(MSFilter *f)
{
WebRTCAECState *s = (WebRTCAECState *) f->data;
AecmConfig config;
int delay_samples = 0;
mblk_t *m;
int error_code;
s->echostarted = FALSE;
delay_samples = s->delay_ms * s->samplerate / 1000;
s->framesize=(framesize*s->samplerate)/8000;
ms_message("Initializing WebRTC echo canceler with framesize=%i, delay_ms=%i, delay_samples=%i", s->framesize, s->delay_ms, delay_samples);
if ((s->aecmInst = WebRtcAecm_Create()) == NULL) {
s->bypass_mode = TRUE;
ms_error("WebRtcAecm_Create(): error, entering bypass mode");
return;
}
if ((error_code = WebRtcAecm_Init(s->aecmInst, s->samplerate)) < 0) {
if (error_code == AECM_BAD_PARAMETER_ERROR) {
ms_error("WebRtcAecm_Init(): WebRTC echo canceller does not support %d samplerate", s->samplerate);
}
s->bypass_mode = TRUE;
ms_error("Entering bypass mode");
return;
}
config.cngMode = TRUE;
config.echoMode = 3;
if (WebRtcAecm_set_config(s->aecmInst, config)!=0){
ms_error("WebRtcAecm_set_config(): failed.");
}
/* fill with zeroes for the time of the delay*/
m = allocb(delay_samples * 2, 0);
m->b_wptr += delay_samples * 2;
ms_bufferizer_put(&s->delayed_ref, m);
s->min_ref_samples = -1;
s->nominal_ref_samples = delay_samples;
ms_audio_flow_controller_init(&s->afc);
s->flow_control_time = f->ticker->time;
}
