mds_def.h

dct,离散余弦变换汇编原代码

/****************************************************************************
Copyright (c) 1996 Analog Devices Inc. All rights reserved.
****************************************************************************/

/***************************************************************************
 * 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


typedef	short	fract16;
typedef long	fract32;

typedef struct {
 fract16 re, im;
} complex_fract16;


typedef struct {
     fract16 real, imag;
} cfract16;

typedef struct {
     fract32 re, im;
} complex_fract32;

typedef struct {
     float re, im;
} complex_float;

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

//#define PI 3.14159265358979
//#define  ROWCOLUMNFFT		16
//#define  FFTSIZE			(ROWCOLUMNFFT * ROWCOLUMNFFT)

#define size    500
//#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 */