text: /*
   * 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 */
  