interpretor/libsndfile-1.0.25/src/GSM610/gsm610_priv.h

   1 /*
   2  * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
   3  * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for
   4  * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
   5  */
   6
   7 #ifndef PRIVATE_H
   8 #define PRIVATE_H
   9
  10 /* Added by Erik de Castro Lopo */
  11 #define USE_FLOAT_MUL
  12 #define FAST
  13 #define WAV49
  14
  15 #ifdef __cplusplus
  16 #error "This code is not designed to be compiled with a C++ compiler."
  17 #endif
  18 /* Added by Erik de Castro Lopo */
  19
  20
  21
  22 typedef short                           word;           /* 16 bit signed int    */
  23 typedef int                                     longword;       /* 32 bit signed int    */
  24
  25 typedef unsigned short          uword;          /* unsigned word        */
  26 typedef unsigned int            ulongword;      /* unsigned longword    */
  27
  28 struct gsm_state
  29 {       word                    dp0[ 280 ] ;
  30
  31         word                    z1;                     /* preprocessing.c, Offset_com. */
  32         longword                L_z2;           /*                  Offset_com. */
  33         int                             mp;                     /*                  Preemphasis */
  34
  35         word                    u[8] ;                  /* short_term_aly_filter.c      */
  36         word                    LARpp[2][8] ;   /*                              */
  37         word                    j;                              /*                              */
  38
  39         word            ltp_cut;        /* long_term.c, LTP crosscorr.  */
  40         word                    nrp;                    /* 40 */        /* long_term.c, synthesis       */
  41         word                    v[9] ;                  /* short_term.c, synthesis      */
  42         word                    msr;                    /* decoder.c,   Postprocessing  */
  43
  44         char                    verbose;                /* only used if !NDEBUG         */
  45         char                    fast;                   /* only used if FAST            */
  46
  47         char                    wav_fmt;                /* only used if WAV49 defined   */
  48         unsigned char   frame_index;    /*            odd/even chaining */
  49         unsigned char   frame_chain;    /*   half-byte to carry forward */
  50
  51         /* Moved here from code.c where it was defined as static */
  52         word e[50] ;
  53 } ;
  54
  55 typedef struct gsm_state GSM_STATE ;
  56
  57 #define MIN_WORD        (-32767 - 1)
  58 #define MAX_WORD          32767
  59
  60 #define MIN_LONGWORD    (-2147483647 - 1)
  61 #define MAX_LONGWORD      2147483647
  62
  63 /* Signed arithmetic shift right. */
  64 static inline word
  65 SASR_W (word x, word by)
  66 {       return (x >> by) ;
  67 } /* SASR */
  68
  69 static inline longword
  70 SASR_L (longword x, word by)
  71 {       return (x >> by) ;
  72 } /* SASR */
  73
  74 /*
  75  *      Prototypes from add.c
  76  */
  77 word    gsm_mult                (word a, word b) ;
  78 longword gsm_L_mult     (word a, word b) ;
  79 word    gsm_mult_r              (word a, word b) ;
  80
  81 word    gsm_div                 (word num, word denum) ;
  82
  83 word    gsm_add                 (word a, word b ) ;
  84 longword gsm_L_add      (longword a, longword b ) ;
  85
  86 word    gsm_sub                 (word a, word b) ;
  87 longword gsm_L_sub      (longword a, longword b) ;
  88
  89 word    gsm_abs                 (word a) ;
  90
  91 word    gsm_norm                (longword a ) ;
  92
  93 longword gsm_L_asl      (longword a, int n) ;
  94 word    gsm_asl                 (word a, int n) ;
  95
  96 longword gsm_L_asr      (longword a, int n) ;
  97 word    gsm_asr                 (word a, int n) ;
  98
  99 /*
 100  *  Inlined functions from add.h
 101  */
 102
 103 static inline longword
 104 GSM_MULT_R (word a, word b)
 105 {       return (((longword) (a)) * ((longword) (b)) + 16384) >> 15 ;
 106 } /* GSM_MULT_R */
 107
 108 static inline longword
 109 GSM_MULT (word a, word b)
 110 {       return (((longword) (a)) * ((longword) (b))) >> 15 ;
 111 } /* GSM_MULT */
 112
 113 static inline longword
 114 GSM_L_MULT (word a, word b)
 115 {       return ((longword) (a)) * ((longword) (b)) << 1 ;
 116 } /* GSM_L_MULT */
 117
 118 static inline longword
 119 GSM_L_ADD (longword a, longword b)
 120 {       ulongword utmp ;
 121
 122         if (a < 0 && b < 0)
 123         {       utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1) ;
 124                 return (utmp >= (ulongword) MAX_LONGWORD) ? MIN_LONGWORD : -(longword)utmp-2 ;
 125                 } ;
 126
 127         if (a > 0 && b > 0)
 128         {       utmp = (ulongword) a + (ulongword) b ;
 129                 return (utmp >= (ulongword) MAX_LONGWORD) ? MAX_LONGWORD : utmp ;
 130                 } ;
 131
 132         return a + b ;
 133 } /* GSM_L_ADD */
 134
 135 static inline longword
 136 GSM_ADD (word a, word b)
 137 {       longword ltmp ;
 138
 139         ltmp = ((longword) a) + ((longword) b) ;
 140
 141         if (ltmp >= MAX_WORD)
 142                 return MAX_WORD ;
 143         if (ltmp <= MIN_WORD)
 144                 return MIN_WORD ;
 145
 146         return ltmp ;
 147 } /* GSM_ADD */
 148
 149 static inline longword
 150 GSM_SUB (word a, word b)
 151 {       longword ltmp ;
 152
 153         ltmp = ((longword) a) - ((longword) b) ;
 154
 155         if (ltmp >= MAX_WORD)
 156                 ltmp = MAX_WORD ;
 157         else if (ltmp <= MIN_WORD)
 158                 ltmp = MIN_WORD ;
 159
 160         return ltmp ;
 161 } /* GSM_SUB */
 162
 163 static inline word
 164 GSM_ABS (word a)
 165 {
 166         if (a > 0)
 167                 return a ;
 168         if (a == MIN_WORD)
 169                 return MAX_WORD ;
 170         return -a ;
 171 } /* GSM_ADD */
 172
 173
 174 /*
 175  *  More prototypes from implementations..
 176  */
 177 void Gsm_Coder (
 178                 struct gsm_state        * S,
 179                 word    * s,    /* [0..159] samples             IN      */
 180                 word    * LARc, /* [0..7] LAR coefficients      OUT     */
 181                 word    * Nc,   /* [0..3] LTP lag               OUT     */
 182                 word    * bc,   /* [0..3] coded LTP gain        OUT     */
 183                 word    * Mc,   /* [0..3] RPE grid selection    OUT     */
 184                 word    * xmaxc,/* [0..3] Coded maximum amplitude OUT   */
 185                 word    * xMc) ;/* [13*4] normalized RPE samples OUT    */
 186
 187 void Gsm_Long_Term_Predictor (          /* 4x for 160 samples */
 188                 struct gsm_state * S,
 189                 word    * d,    /* [0..39]   residual signal    IN      */
 190                 word    * dp,   /* [-120..-1] d'                IN      */
 191                 word    * e,    /* [0..40]                      OUT     */
 192                 word    * dpp,  /* [0..40]                      OUT     */
 193                 word    * Nc,   /* correlation lag              OUT     */
 194                 word    * bc) ; /* gain factor                  OUT     */
 195
 196 void Gsm_LPC_Analysis (
 197                 struct gsm_state * S,
 198                 word * s,               /* 0..159 signals       IN/OUT  */
 199                 word * LARc) ;   /* 0..7   LARc's       OUT     */
 200
 201 void Gsm_Preprocess (
 202                 struct gsm_state * S,
 203                 word * s, word * so) ;
 204
 205 void Gsm_Encoding (
 206                 struct gsm_state * S,
 207                 word    * e,
 208                 word    * ep,
 209                 word    * xmaxc,
 210                 word    * Mc,
 211                 word    * xMc) ;
 212
 213 void Gsm_Short_Term_Analysis_Filter (
 214                 struct gsm_state * S,
 215                 word    * LARc, /* coded log area ratio [0..7]  IN      */
 216                 word    * d) ;  /* st res. signal [0..159]      IN/OUT  */
 217
 218 void Gsm_Decoder (
 219                 struct gsm_state * S,
 220                 word    * LARcr,        /* [0..7]               IN      */
 221                 word    * Ncr,          /* [0..3]               IN      */
 222                 word    * bcr,          /* [0..3]               IN      */
 223                 word    * Mcr,          /* [0..3]               IN      */
 224                 word    * xmaxcr,       /* [0..3]               IN      */
 225                 word    * xMcr,         /* [0..13*4]            IN      */
 226                 word    * s) ;          /* [0..159]             OUT     */
 227
 228 void Gsm_Decoding (
 229                 struct gsm_state * S,
 230                 word    xmaxcr,
 231                 word    Mcr,
 232                 word    * xMcr,         /* [0..12]              IN      */
 233                 word    * erp) ;        /* [0..39]              OUT     */
 234
 235 void Gsm_Long_Term_Synthesis_Filtering (
 236                 struct gsm_state* S,
 237                 word    Ncr,
 238                 word    bcr,
 239                 word    * erp,          /* [0..39]                IN    */
 240                 word    * drp) ;        /* [-120..-1] IN, [0..40] OUT   */
 241
 242 void Gsm_RPE_Decoding (
 243         /*-struct gsm_state *S,-*/
 244                 word xmaxcr,
 245                 word Mcr,
 246                 word * xMcr,  /* [0..12], 3 bits             IN      */
 247                 word * erp) ; /* [0..39]                     OUT     */
 248
 249 void Gsm_RPE_Encoding (
 250                 /*-struct gsm_state * S,-*/
 251                 word    * e,            /* -5..-1][0..39][40..44     IN/OUT  */
 252                 word    * xmaxc,        /*                              OUT */
 253                 word    * Mc,           /*                              OUT */
 254                 word    * xMc) ;        /* [0..12]                      OUT */
 255
 256 void Gsm_Short_Term_Synthesis_Filter (
 257                 struct gsm_state * S,
 258                 word    * LARcr,        /* log area ratios [0..7]  IN   */
 259                 word    * drp,          /* received d [0...39]     IN   */
 260                 word    * s) ;          /* signal   s [0..159]    OUT   */
 261
 262 void Gsm_Update_of_reconstructed_short_time_residual_signal (
 263                 word    * dpp,          /* [0...39]     IN      */
 264                 word    * ep,           /* [0...39]     IN      */
 265                 word    * dp) ;         /* [-120...-1]  IN/OUT  */
 266
 267 /*
 268  *  Tables from table.c
 269  */
 270 #ifndef GSM_TABLE_C
 271
 272 extern word gsm_A [8], gsm_B [8], gsm_MIC [8], gsm_MAC [8] ;
 273 extern word gsm_INVA [8] ;
 274 extern word gsm_DLB [4], gsm_QLB [4] ;
 275 extern word gsm_H [11] ;
 276 extern word gsm_NRFAC [8] ;
 277 extern word gsm_FAC [8] ;
 278
 279 #endif  /* GSM_TABLE_C */
 280
 281 /*
 282  *  Debugging
 283  */
 284 #ifdef NDEBUG
 285
 286 #       define  gsm_debug_words(a, b, c, d)             /* nil */
 287 #       define  gsm_debug_longwords(a, b, c, d)         /* nil */
 288 #       define  gsm_debug_word(a, b)                    /* nil */
 289 #       define  gsm_debug_longword(a, b)                /* nil */
 290
 291 #else   /* !NDEBUG => DEBUG */
 292
 293         void  gsm_debug_words     (char * name, int, int, word *) ;
 294         void  gsm_debug_longwords (char * name, int, int, longword *) ;
 295         void  gsm_debug_longword  (char * name, longword) ;
 296         void  gsm_debug_word      (char * name, word) ;
 297
 298 #endif /* !NDEBUG */
 299
 300 #endif  /* PRIVATE_H */
 301