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 /*$Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/private.h,v 1.6 1996/07/02 10:15:26 jutta Exp $*/ 8 9 #ifndef PRIVATE_H 10 #define PRIVATE_H 11 12 typedef short word; /* 16 bit signed int */ 13 typedef long longword; /* 32 bit signed int */ 14 15 typedef unsigned short uword; /* unsigned word */ 16 typedef unsigned long ulongword; /* unsigned longword */ 17 18 struct gsm_state { 19 20 word dp0[ 280 ]; 21 word e[ 50 ]; /* code.c */ 22 23 word z1; /* preprocessing.c, Offset_com. */ 24 longword L_z2; /* Offset_com. */ 25 int mp; /* Preemphasis */ 26 27 word u[8]; /* short_term_aly_filter.c */ 28 word LARpp[2][8]; /* */ 29 word j; /* */ 30 31 word ltp_cut; /* long_term.c, LTP crosscorr. */ 32 word nrp; /* 40 */ /* long_term.c, synthesis */ 33 word v[9]; /* short_term.c, synthesis */ 34 word msr; /* decoder.c, Postprocessing */ 35 36 char verbose; /* only used if !NDEBUG */ 37 char fast; /* only used if FAST */ 38 39 char wav_fmt; /* only used if WAV49 defined */ 40 unsigned char frame_index; /* odd/even chaining */ 41 unsigned char frame_chain; /* half-byte to carry forward */ 42 }; 43 44 45 #define MIN_WORD (-32767 - 1) 46 #define MAX_WORD 32767 47 48 #define MIN_LONGWORD (-2147483647 - 1) 49 #define MAX_LONGWORD 2147483647 50 51 #ifdef SASR /* flag: >> is a signed arithmetic shift right */ 52 #undef SASR 53 #define SASR(x, by) ((x) >> (by)) 54 #else 55 #define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by)))) 56 #endif /* SASR */ 57 58 #include "proto.h" 59 60 /* 61 * Prototypes from add.c 62 */ 63 extern word gsm_mult P((word a, word b)); 64 extern longword gsm_L_mult P((word a, word b)); 65 extern word gsm_mult_r P((word a, word b)); 66 67 extern word gsm_div P((word num, word denum)); 68 69 extern word gsm_add P(( word a, word b )); 70 extern longword gsm_L_add P(( longword a, longword b )); 71 72 extern word gsm_sub P((word a, word b)); 73 extern longword gsm_L_sub P((longword a, longword b)); 74 75 extern word gsm_abs P((word a)); 76 77 extern word gsm_norm P(( longword a )); 78 79 extern longword gsm_L_asl P((longword a, int n)); 80 extern word gsm_asl P((word a, int n)); 81 82 extern longword gsm_L_asr P((longword a, int n)); 83 extern word gsm_asr P((word a, int n)); 84 85 /* 86 * Inlined functions from add.h 87 */ 88 89 /* 90 * #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \ 91 * (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15)) 92 */ 93 #define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */ \ 94 (SASR( ((longword)(a) * (longword)(b) + 16384), 15 )) 95 96 # define GSM_MULT(a,b) /* word a, word b, !(a == b == MIN_WORD) */ \ 97 (SASR( ((longword)(a) * (longword)(b)), 15 )) 98 99 # define GSM_L_MULT(a, b) /* word a, word b */ \ 100 (((longword)(a) * (longword)(b)) << 1) 101 102 # define GSM_L_ADD(a, b) \ 103 ( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \ 104 : (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \ 105 >= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \ 106 : ((b) <= 0 ? (a) + (b) \ 107 : (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \ 108 ? MAX_LONGWORD : utmp)) 109 110 /* 111 * # define GSM_ADD(a, b) \ 112 * ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \ 113 * ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp) 114 */ 115 /* Nonportable, but faster: */ 116 117 #define GSM_ADD(a, b) \ 118 ((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \ 119 MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp) 120 121 # define GSM_SUB(a, b) \ 122 ((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \ 123 ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp) 124 125 # define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a)) 126 127 /* Use these if necessary: 128 129 # define GSM_MULT_R(a, b) gsm_mult_r(a, b) 130 # define GSM_MULT(a, b) gsm_mult(a, b) 131 # define GSM_L_MULT(a, b) gsm_L_mult(a, b) 132 133 # define GSM_L_ADD(a, b) gsm_L_add(a, b) 134 # define GSM_ADD(a, b) gsm_add(a, b) 135 # define GSM_SUB(a, b) gsm_sub(a, b) 136 137 # define GSM_ABS(a) gsm_abs(a) 138 139 */ 140 141 /* 142 * More prototypes from implementations.. 143 */ 144 extern void Gsm_Coder P(( 145 struct gsm_state * S, 146 word * s, /* [0..159] samples IN */ 147 word * LARc, /* [0..7] LAR coefficients OUT */ 148 word * Nc, /* [0..3] LTP lag OUT */ 149 word * bc, /* [0..3] coded LTP gain OUT */ 150 word * Mc, /* [0..3] RPE grid selection OUT */ 151 word * xmaxc,/* [0..3] Coded maximum amplitude OUT */ 152 word * xMc /* [13*4] normalized RPE samples OUT */)); 153 154 extern void Gsm_Long_Term_Predictor P(( /* 4x for 160 samples */ 155 struct gsm_state * S, 156 word * d, /* [0..39] residual signal IN */ 157 word * dp, /* [-120..-1] d' IN */ 158 word * e, /* [0..40] OUT */ 159 word * dpp, /* [0..40] OUT */ 160 word * Nc, /* correlation lag OUT */ 161 word * bc /* gain factor OUT */)); 162 163 extern void Gsm_LPC_Analysis P(( 164 struct gsm_state * S, 165 word * s, /* 0..159 signals IN/OUT */ 166 word * LARc)); /* 0..7 LARc's OUT */ 167 168 extern void Gsm_Preprocess P(( 169 struct gsm_state * S, 170 word * s, word * so)); 171 172 extern void Gsm_Encoding P(( 173 struct gsm_state * S, 174 word * e, 175 word * ep, 176 word * xmaxc, 177 word * Mc, 178 word * xMc)); 179 180 extern void Gsm_Short_Term_Analysis_Filter P(( 181 struct gsm_state * S, 182 word * LARc, /* coded log area ratio [0..7] IN */ 183 word * d /* st res. signal [0..159] IN/OUT */)); 184 185 extern void Gsm_Decoder P(( 186 struct gsm_state * S, 187 word * LARcr, /* [0..7] IN */ 188 word * Ncr, /* [0..3] IN */ 189 word * bcr, /* [0..3] IN */ 190 word * Mcr, /* [0..3] IN */ 191 word * xmaxcr, /* [0..3] IN */ 192 word * xMcr, /* [0..13*4] IN */ 193 word * s)); /* [0..159] OUT */ 194 195 extern void Gsm_Decoding P(( 196 struct gsm_state * S, 197 word xmaxcr, 198 word Mcr, 199 word * xMcr, /* [0..12] IN */ 200 word * erp)); /* [0..39] OUT */ 201 202 extern void Gsm_Long_Term_Synthesis_Filtering P(( 203 struct gsm_state* S, 204 word Ncr, 205 word bcr, 206 word * erp, /* [0..39] IN */ 207 word * drp)); /* [-120..-1] IN, [0..40] OUT */ 208 209 void Gsm_RPE_Decoding P(( 210 struct gsm_state *S, 211 word xmaxcr, 212 word Mcr, 213 word * xMcr, /* [0..12], 3 bits IN */ 214 word * erp)); /* [0..39] OUT */ 215 216 void Gsm_RPE_Encoding P(( 217 struct gsm_state * S, 218 word * e, /* -5..-1][0..39][40..44 IN/OUT */ 219 word * xmaxc, /* OUT */ 220 word * Mc, /* OUT */ 221 word * xMc)); /* [0..12] OUT */ 222 223 extern void Gsm_Short_Term_Synthesis_Filter P(( 224 struct gsm_state * S, 225 word * LARcr, /* log area ratios [0..7] IN */ 226 word * drp, /* received d [0...39] IN */ 227 word * s)); /* signal s [0..159] OUT */ 228 229 extern void Gsm_Update_of_reconstructed_short_time_residual_signal P(( 230 word * dpp, /* [0...39] IN */ 231 word * ep, /* [0...39] IN */ 232 word * dp)); /* [-120...-1] IN/OUT */ 233 234 /* 235 * Tables from table.c 236 */ 237 #ifndef GSM_TABLE_C 238 239 extern word gsm_A[8], gsm_B[8], gsm_MIC[8], gsm_MAC[8]; 240 extern word gsm_INVA[8]; 241 extern word gsm_DLB[4], gsm_QLB[4]; 242 extern word gsm_H[11]; 243 extern word gsm_NRFAC[8]; 244 extern word gsm_FAC[8]; 245 246 #endif /* GSM_TABLE_C */ 247 248 /* 249 * Debugging 250 */ 251 #ifdef NDEBUG 252 253 # define gsm_debug_words(a, b, c, d) /* nil */ 254 # define gsm_debug_longwords(a, b, c, d) /* nil */ 255 # define gsm_debug_word(a, b) /* nil */ 256 # define gsm_debug_longword(a, b) /* nil */ 257 258 #else /* !NDEBUG => DEBUG */ 259 260 extern void gsm_debug_words P((char * name, int, int, word *)); 261 extern void gsm_debug_longwords P((char * name, int, int, longword *)); 262 extern void gsm_debug_longword P((char * name, longword)); 263 extern void gsm_debug_word P((char * name, word)); 264 265 #endif /* !NDEBUG */ 266 267 #include "unproto.h" 268 269 #endif /* PRIVATE_H */ 270