I have invoke the speex echo cancellation interface as follow, but it seems not
work (the echo still exists, my testbed is a small udp based p2p voice chat
software). Can anyone tell me why it doesn't work? or whether I have made
some mistake? Thanks a lot.
#define SPEEX_SAMPLERATE 8000
#define SPEEX_NN 128
#define SPEEX_TAIL 1920
class AECHandler
{
public:
AECHandler(void){
this->st = speex_echo_state_init(SPEEX_NN, SPEEX_TAIL);
int tmp = SPEEX_SAMPLERATE;
this->den = speex_preprocess_state_init(SPEEX_NN, SPEEX_SAMPLERATE);
speex_echo_ctl(st, SPEEX_ECHO_SET_SAMPLING_RATE, &tmp);
speex_preprocess_ctl(den, SPEEX_PREPROCESS_SET_ECHO_SUPPRESS_ACTIVE,
st);
//int tmp1 = 1;
//speex_preprocess_ctl(den, SPEEX_PREPROCESS_SET_AGC, &tmp1);
}
//FILE *echo_fd, *ref_fd, *e_fd;
short echo_buf[SPEEX_NN], ref_buf[SPEEX_NN], e_buf[SPEEX_NN];
SpeexEchoState *st;
SpeexPreprocessState *den;
char* inputBuf;
~AECHandler(void){
speex_echo_state_destroy(this->st);
speex_preprocess_state_destroy(this->den);
}
void HookComingSound(char* buf){
speex_echo_playback(this->st,(spx_int16_t*)buf);
}
void HookOutingSound(char* origin, char* &outbuf){
speex_echo_capture(this->st,(spx_int16_t*)origin,(spx_int16_t*)outbuf);
speex_preprocess_run(this->den,(spx_int16_t*)outbuf);
}
};
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://lists.xiph.org/pipermail/speex-dev/attachments/20090213/d5900cc4/attachment.htm
