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/********************************************************************
*
* Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
* Universitaet Berlin. See the accompanying file "COPYRIGHT" for
* details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
*
********************************************************************/
#include "xa_gsm.h"
typedef short word; /* 16 bit signed int */
typedef int longword; /* 32 bit signed int */
typedef unsigned short uword; /* unsigned word */
typedef unsigned int ulongword; /* unsigned longword */
typedef struct {
word dp0[ 280 ];
word z1; /* preprocessing.c, Offset_com. */
longword L_z2; /* Offset_com. */
int mp; /* Preemphasis */
word u[8]; /* short_term_aly_filter.c */
word LARpp[2][8]; /* */
word j; /* */
word ltp_cut; /* long_term.c, LTP crosscorr. */
word nrp; /* 40 */ /* long_term.c, synthesis */
word v[9]; /* short_term.c, synthesis */
word msr; /* decoder.c, Postprocessing */
char verbose; /* only used if !NDEBUG */
char fast; /* only used if FAST */
char wav_fmt; /* only used if WAV49 defined */
unsigned char frame_index; /* odd/even chaining */
unsigned char frame_chain; /* half-byte to carry forward */
} XA_GSM_STATE;
#define MIN_WORD (-32767 - 1)
#define MAX_WORD 32767
#define MIN_LONGWORD (-2147483647 - 1)
#define MAX_LONGWORD 2147483647
#ifdef SASR /* flag: >> is a signed arithmetic shift right */
#undef SASR
#define SASR(x, by) ((x) >> (by))
#else
#define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))
#endif /* SASR */
/*
* Inlined functions from add.h
*/
/*
* #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \
* (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15))
*/
#define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */ \
(SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))
# define GSM_MULT(a,b) /* word a, word b, !(a == b == MIN_WORD) */ \
(SASR( ((longword)(a) * (longword)(b)), 15 ))
# define GSM_L_MULT(a, b) /* word a, word b */ \
(((longword)(a) * (longword)(b)) << 1)
# define GSM_L_ADD(a, b) \
( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \
: (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \
>= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \
: ((b) <= 0 ? (a) + (b) \
: (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \
? MAX_LONGWORD : utmp))
/*
* # define GSM_ADD(a, b) \
* ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \
* ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
*/
/* Nonportable, but faster: */
#define GSM_ADD(a, b) \
((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \
MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)
# define GSM_SUB(a, b) \
((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \
? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
# define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))
/* Use these if necessary:
# define GSM_MULT_R(a, b) gsm_mult_r(a, b)
# define GSM_MULT(a, b) gsm_mult(a, b)
# define GSM_L_MULT(a, b) gsm_L_mult(a, b)
# define GSM_L_ADD(a, b) gsm_L_add(a, b)
# define GSM_ADD(a, b) gsm_add(a, b)
# define GSM_SUB(a, b) gsm_sub(a, b)
# define GSM_ABS(a) gsm_abs(a)
*/
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