audio.h

基于TMS320VC5509的PCM编码

#include <math.h>
#include "tms320.h"
#include "dsplib.h"

#define NX 64
#define NH 64
#pragma DATA_SECTION(h,".coeffs")
DATA h[NH]=
{
-121,
  -44,
   50,
  168,
  313,
  479,
  649,
  793,
  869,
  834,
  643,
  264,
 -313,
-1068,
-1948,
-2861,
-3683,
-4263,
-4443,
-4070,
-3017,
-1202,
 1395,
 4726,
 8667,
13024,
17549,
21953,
25938,
29219,
31554,
32767,
32767,
31554,
29219,
25938,
21953,
17549,
13024,
 8667,
 4726,
 1395,
-1202,
-3017,
-4070,
-4443,
-4263,
-3683,
-2861,
-1948,
-1068,
 -313,
  264,
  643,
  834,
  869,
  793,
  649,
  479,
  313,
  168,
   50,
  -44,
 -121 
 };

#pragma DATA_SECTION(db,".dbuffer")
DATA db[NH+2] ;

#pragma DATA_SECTION(x,".dbuffer")
#pragma DATA_SECTION(xx,".dbuffer")
#pragma DATA_SECTION(r,".dbuffer")
DATA x[1088],xx[1088],r[NX];

/*
  798,
 1737,
 4412,
 9239,
15839,
23042,
29208,
32767,
32767,
29208,
23042,
15839,
 9239,
 4412,
 1737,
  798 
*/