libmpcodecs/native/xa_gsm_int.h

   1 /********************************************************************
   2  *
   3  * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
   4  * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
   5  * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
   6  *
   7  * The contents of the file COPYRIGHT:
   8  *
   9  * Any use of this software is permitted provided that this notice is not
  10  * removed and that neither the authors nor the Technische Universitaet Berlin
  11  * are deemed to have made any representations as to the suitability of this
  12  * software for any purpose nor are held responsible for any defects of
  13  * this software.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
  14  *
  15  * As a matter of courtesy, the authors request to be informed about uses
  16  * this software has found, about bugs in this software, and about any
  17  * improvements that may be of general interest.
  18  *
  19  *     Berlin, 15.09.1992
  20  *     Jutta Degener
  21  *     Carsten Bormann
  22  *
  23  ********************************************************************/
  24
  25 #ifndef MPLAYER_XA_GSM_INT_H
  26 #define MPLAYER_XA_GSM_INT_H
  27
  28 #include "xa_gsm.h"
  29
  30
  31 typedef short                   word;           /* 16 bit signed int    */
  32 typedef int                     longword;       /* 32 bit signed int    */
  33
  34 typedef unsigned short          uword;          /* unsigned word        */
  35 typedef unsigned int            ulongword;      /* unsigned longword    */
  36
  37 typedef struct {
  38
  39         word            dp0[ 280 ];
  40
  41         word            z1;             /* preprocessing.c, Offset_com. */
  42         longword        L_z2;           /*                  Offset_com. */
  43         int             mp;             /*                  Preemphasis */
  44
  45         word            u[8];           /* short_term_aly_filter.c      */
  46         word            LARpp[2][8];    /*                              */
  47         word            j;              /*                              */
  48
  49         word            ltp_cut;        /* long_term.c, LTP crosscorr.  */
  50         word            nrp; /* 40 */   /* long_term.c, synthesis       */
  51         word            v[9];           /* short_term.c, synthesis      */
  52         word            msr;            /* decoder.c,   Postprocessing  */
  53
  54         char            verbose;        /* only used if !NDEBUG         */
  55         char            fast;           /* only used if FAST            */
  56
  57         char            wav_fmt;        /* only used if WAV49 defined   */
  58         unsigned char   frame_index;    /*            odd/even chaining */
  59         unsigned char   frame_chain;    /*   half-byte to carry forward */
  60 } XA_GSM_STATE;
  61
  62
  63 #define MIN_WORD        (-32767 - 1)
  64 #define MAX_WORD          32767
  65
  66 #define MIN_LONGWORD    (-2147483647 - 1)
  67 #define MAX_LONGWORD      2147483647
  68
  69 #ifdef  SASR            /* flag: >> is a signed arithmetic shift right */
  70 #undef  SASR
  71 #define SASR(x, by)     ((x) >> (by))
  72 #else
  73 #define SASR(x, by)     ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))
  74 #endif  /* SASR */
  75
  76
  77
  78 /*
  79  *  Inlined functions from add.h
  80  */
  81
  82 /*
  83  * #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \
  84  *      (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15))
  85  */
  86 #define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */    \
  87         (SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))
  88
  89 # define GSM_MULT(a,b)   /* word a, word b, !(a == b == MIN_WORD) */    \
  90         (SASR( ((longword)(a) * (longword)(b)), 15 ))
  91
  92 # define GSM_L_MULT(a, b) /* word a, word b */  \
  93         (((longword)(a) * (longword)(b)) << 1)
  94
  95 # define GSM_L_ADD(a, b)        \
  96         ( (a) <  0 ? ( (b) >= 0 ? (a) + (b)     \
  97                  : (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \
  98                    >= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 )   \
  99         : ((b) <= 0 ? (a) + (b)   \
 100                   : (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \
 101                     ? MAX_LONGWORD : utmp))
 102
 103 /*
 104  * # define GSM_ADD(a, b)       \
 105  *      ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \
 106  *      ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
 107  */
 108 /* Nonportable, but faster: */
 109
 110 #define GSM_ADD(a, b)   \
 111         ((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \
 112                 MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)
 113
 114 # define GSM_SUB(a, b)  \
 115         ((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \
 116         ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
 117
 118 # define GSM_ABS(a)     ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))
 119
 120 /* Use these if necessary:
 121
 122 # define GSM_MULT_R(a, b)       gsm_mult_r(a, b)
 123 # define GSM_MULT(a, b)         gsm_mult(a, b)
 124 # define GSM_L_MULT(a, b)       gsm_L_mult(a, b)
 125
 126 # define GSM_L_ADD(a, b)        gsm_L_add(a, b)
 127 # define GSM_ADD(a, b)          gsm_add(a, b)
 128 # define GSM_SUB(a, b)          gsm_sub(a, b)
 129
 130 # define GSM_ABS(a)             gsm_abs(a)
 131
 132 */
 133
 134 #endif /* MPLAYER_XA_GSM_INT_H */