pitchvq_ad.c

来自「this the source code of addio compressio」· C语言 代码 · 共 35 行

#include <math.h>
#include "ccsub.h"

extern float selec_ad[MAXLP];

pitchvq_ad(rar, idim, buf, idimb, b)
int idim, idimb;
float rar[], buf[], b[];

{
  int k, m;
  register int i;
  float  frac;

  k = 149;
  m = b[0];
  frac = b[0] - m;

  /* *update memory							 */

/*  for (i = 0; i < k; i++) buf[i] = buf[i + idim];          */
  memmove( buf, &buf[idim], k*sizeof(float) );


  if (fabs(frac) < 1.e-4)
  {
    for (i = k; i < idimb; i++)	buf[i] = buf[i - m];
    for (i = 0; i < idim; i++)	buf[i+k] = rar[i] = b[2] * buf[i + k]; 
  }
  else 
  {
    for (i = 0; i < idim; i++)	buf[i+k] = rar[i] = b[2] * selec_ad[i]; 
  }
}