/*
 * 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.
 */

/*$Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/private.h,v 1.6
 * 1996/07/02 10:15:26 jutta Exp $*/

#ifndef PRIVATE_H
#define PRIVATE_H

#pragma GCC system_header

typedef short word;    /* 16 bit signed int	*/
typedef long longword; /* 32 bit signed int	*/

typedef unsigned short uword;    /* unsigned word	*/
typedef unsigned long ulongword; /* unsigned longword	*/

struct gsm_state {
  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	*/
};

#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 */

#include "proto.h"

#if 0
/*
 *	Prototypes from add.c
 */
extern word	gsm_mult 	P((word a, word b));
extern longword gsm_L_mult 	P((word a, word b));
extern word	gsm_mult_r	P((word a, word b));

extern word	gsm_div  	P((word num, word denum));

extern word	gsm_add 	P(( word a, word b ));
extern longword gsm_L_add 	P(( longword a, longword b ));

extern word	gsm_sub 	P((word a, word b));
extern longword gsm_L_sub 	P((longword a, longword b));

extern word	gsm_abs 	P((word a));

extern word	gsm_norm 	P(( longword a ));

extern longword gsm_L_asl  	P((longword a, int n));
extern word	gsm_asl 	P((word a, int n));

extern longword gsm_L_asr  	P((longword a, int n));
extern word	gsm_asr  	P((word a, int n));
#endif

/*
 *  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)

*/

/*
 *  Tables from table.c
 */
#ifndef GSM_TABLE_C

extern word gsm_A[8], gsm_B[8], gsm_MIC[8], gsm_MAC[8];
extern word gsm_INVA[8];
extern word gsm_DLB[4], gsm_QLB[4];
extern word gsm_H[11];
extern word gsm_NRFAC[8];
extern word gsm_FAC[8];

#endif /* GSM_TABLE_C */

/*
 *  Debugging
 */
#ifdef NDEBUG

#define gsm_debug_words(a, b, c, d)     /* nil */
#define gsm_debug_longwords(a, b, c, d) /* nil */
#define gsm_debug_word(a, b)            /* nil */
#define gsm_debug_longword(a, b)        /* nil */

#else /* !NDEBUG => DEBUG */

extern void gsm_debug_words P((char* name, int, int, word*));
extern void gsm_debug_longwords P((char* name, int, int, longword*));
extern void gsm_debug_longword P((char* name, longword));
extern void gsm_debug_word P((char* name, word));

#endif /* !NDEBUG */

#include "unproto.h"

#endif /* PRIVATE_H */
