mds_def.h

该程序是在ADIdsp上,实现fir运算。开发环境用的是VDSP++3.5

/*
* $Source: /usr/gcc/DELIVERABLES/adi-21csp-sol/21csp/include/mdsp/mds_def.h,v $
* $Revision: 1.1.1.1 $
* $Author: levb $ $Date: 1996/11/13 15:58:28 $
*/
/****************************************************************************
Copyright (c) 1996 Analog Devices Inc. All rights reserved.
****************************************************************************/
/* @(#) File: mds_def.h
    Date May 15, 1996 $
    Revised Aug 28, 1996
    Version 1.14
    
*/
#define PRINTF_SUPPORT
#ifndef _MDS_DEF_INC
#define _MDS_DEF_INC

typedef short   fract16;
typedef long    fract32;


typedef struct {

 fract16 re, im;

} complex_fract16;




typedef struct {
     fract16 real, imag;
} cfract16;

typedef struct {
     fract32 real, imag;
} cfract32;

typedef struct {
     float real, imag;
} cfloat;






typedef struct

{

    int k;

    complex_fract16 *h;

    complex_fract16 *d;

    complex_fract16 *p;

}cfir_state_fr16;



typedef struct 

{

    fract16 *c;    /* coefficients                   */

    fract16 *d;    /* start of delay line            */

    int k;       /* number of bi-quad stages       */

} iir_state_fr16;


#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 */