speex噪音消除

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "speex/speex_preprocess.h"
#include <stdio.h>

#define NN 160

int main()
{
   short in[NN];
   int i;
   SpeexPreprocessState *st;
   int count=0;
   float f;

   st = speex_preprocess_state_init(NN, 8000);
   i=1;
   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DENOISE, &i);
   i=0;
   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_AGC, &i);
   i=8000;
   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_AGC_LEVEL, &i);
   i=0;
   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB, &i);
   f=.0;
   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB_DECAY, &f);
   f=.0;
   speex_preprocess_ctl(st, SPEEX_PREPROCESS_SET_DEREVERB_LEVEL, &f);
   while (1)
   {
      int vad;
      fread(in, si