typedefs.h

It is source code for Melp2.4kps vocoder using dsp tms320vc55x of ti

/*************************************************************************
*
* The following code was hand optimized for the Texas Instuments
* TMS320C5x DSP by DSPCon, Inc.  For information, please contact DSPCon
* at:
* 
*                       DSPCon, Inc.
*                       380 Foothill Road
*                       Bridgewater, New Jersey 08807
*                       [phone]
*                       [e-mail]
*                       www.dspcon.com
*
*************************************************************************/



/* typedef statements of types used in all routines */

#include <stdlib.h>

#ifndef __TYPEDEFS
#define __TYPEDEFS

#define LW_SIGN (long)0x80000000       /* sign bit */
#define LW_MIN (long)0x80000000
#define LW_MAX (long)0x7fffffff

#define SW_SIGN (short)0x8000	       /* sign bit for Shortword type */
#define SW_MIN (short)0x8000	       /* smallest Ram */
#define SW_MAX (short)0x7fff	       /* largest Ram */

/* Definition of Types *
 ***********************/

typedef long int Longword;	       /* 32 bit "accumulator" (L_*) */
typedef short int Shortword;	       /* 16 bit "register"  (sw*) */
typedef short int ShortwordRom;        /* 16 bit ROM data    (sr*) */
typedef long int LongwordRom;	       /* 32 bit ROM data    (L_r*)  */

typedef unsigned short UShortword;     /* 16 bit unsigned data */
typedef unsigned long ULongword;       /* 32 bit unsigned data */

struct NormSw { 		       /* normalized Shortword fractional
					* number snr.man precedes snr.sh
					* (the shift count)i */
  Shortword man;		       /* "mantissa" stored in 16 bit
					* location */
  Shortword sh; 		       /* the shift count, stored in 16 bit
					* location */
};


/* Global constants *
 ********************/


#define NP 10			       /* order of the lpc filter */
#define N_SUB 4 		       /* number of subframes */
#define F_LEN 160		       /* number of samples in a frame */
#define S_LEN 40		       /* number of samples in a subframe */
#define A_LEN 170		       /* LPC analysis length */
#define OS_FCTR 6		       /* maximum LTP lag oversampling
					* factor */
#define OVERHANG 8			/* comfort noise parameter:
					   number of frames averaged to
					   CN generate reference */
#define OH_SHIFT 3			/* shift corresponding to
					   OVERHANG */
#define PN_INIT_SEED (Longword)0x1091988L /* initial seed for Comfort
					     noise pn-generator */

#define strStr strStr16

/* global variables */
/********************/

extern int giFrmCnt;		       /* 0,1,2,3,4..... */
extern int giSfrmCnt;		       /* 0,1,2,3 */
extern int giOverflow;
extern int giCarry;
extern int giRandomRF;


/* Primary comfort noise/DTX state variable */
extern Shortword gswDTXFrmCnt; /* encoders DTX frame counter */
extern Shortword gswLastDTXFrmCnt; /* gswDTXFrmCnt delayed by 1 frame */


/* !! upd !! PHILIPS #1*/
extern int giDTXon;   /* DTX Mode on/off */
/* !! end of update !! PHILIPS #1 */

extern int  giWriteFile;

#endif