mds_def.h

这是linux环境下的DCT变换的程序

/******************************************************************************
 * File Name : mds_def.h

 *

 * This is the header file used for the testing of DSP library. It defines the

 * required data types. It also contains the imporatant hash definitions.
 ***************************************************************************/
#ifndef _MDS_DEF_INC
#define _MDS_DEF_INC
#define  fract16  short
#define  fract32  long

/*#define struct {
 fract16 re, im;
} complex_fract16;

#define struct {
     fract16 real, imag;
} cfract16;

#define struct {
     fract32 re, im;
} complex_fract32;

#define struct {
     float re, im;
} complex_float;

#define struct
{
    int k;
    complex_fract16 *h;
    complex_fract16 *d;
    complex_fract16 *p;
}fir_state;

#define size    500
#define PI 3.14159265358979

//#define MAX       100
#define NBITS       16
#define NBITS1      (NBITS-1)
#define NBITS2      (NBITS-2)
#define PROUNDING   (1<<(NBITS-2))
#define RROUNDING   (1<<(NBITS-3))

#define LARGESTP    (fract16)0x7fff
#define LARGESTN    (fract16)0x8000

#define LARGESTLP   (fract32)0x7fffffff
#define LARGESTLN   (fract32)0x80000000

#define MDS_FP_PI   (float)3.1415926535897931
#define MDS_FP_PI2  (float)6.2831853071795862
#define MDS_FP_PIH  (float)1.5707963267948966
#define MDS_FP_PIQ  (float)7.8539816339744828e-01

#define MDS_FP_LOG10    (float)2.3025851249694824

#define MDS_FX_PI   0x40490fdb
#define MDS_FX_PI2  0x40c90fdb
#define MDS_FX_PIH  0x3fc90fdb
#define MDS_FX_PIQ  0x3f490fdb

#define MDS_FX_LOG10    0x40135d8e*/

#endif /* _MDS_DEF_INC */