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view typedefs.h @ 5:59fc7fc126d0

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mv utils.c reid.c In the original GSM 06.06 code drop, reid.c resides in the "utilities" collection (Dir_UTIL.zip), but there is also a copy of reid.c named utils.c in the "C" collection (Dir_C.zip), even though it is never compiled or linked as such. When I originally created the present Hg repository, I did not intend to include REID, only the main body of the codec - but I overlooked that utils.c copy, so it got imported. In the present time, however, it has become useful to have REID code in Hg for easier public study and discussion - so let's have it under its proper name.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 22 Jul 2024 18:43:12 +0000
parents 9008dbc8ca74
children
line wrap: on
line source

/*******************************************************************
 *
 * typedef statements of types used in all half-rate GSM routines
 *
 ******************************************************************/

#ifndef __TYPEDEFS
#define __TYPEDEFS

#define DATE    "August 8, 1996    "
#define VERSION "Version 4.2       "

#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*)  */

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                     /* vad parameter */
#define strStr strStr16

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

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

extern int giDTXon;                    /* DTX Mode on/off */

#endif