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: /nfshome/cvs/xine-lib/src/libxineadec/gsm610/private.h,v 1.1 2002/10/12 19:12:49 tmmm 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 22 word z1; /* preprocessing.c, Offset_com. */ 23 longword L_z2; /* Offset_com. */ 24 int mp; /* Preemphasis */ 25 26 word u[8]; /* short_term_aly_filter.c */ 27 word LARpp[2][8]; /* */ 28 word j; /* */ 29 30 word ltp_cut; /* long_term.c, LTP crosscorr. */ 31 word nrp; /* 40 */ /* long_term.c, synthesis */ 32 word v[9]; /* short_term.c, synthesis */ 33 word msr; /* decoder.c, Postprocessing */ 34 35 char verbose; /* only used if !NDEBUG */ 36 char fast; /* only used if FAST */ 37 38 char wav_fmt; /* only used if WAV49 defined */ 39 unsigned char frame_index; /* odd/even chaining */ 40 unsigned char frame_chain; /* half-byte to carry forward */ 41 }; 42 43 44 #define MIN_WORD (-32767 - 1) 45 #define MAX_WORD 32767 46 47 #define MIN_LONGWORD (-2147483647 - 1) 48 #define MAX_LONGWORD 2147483647 49 50 #ifdef SASR /* flag: >> is a signed arithmetic shift right */ 51 #undef SASR 52 #define SASR(x, by) ((x) >> (by)) 53 #else 54 #define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by)))) 55 #endif /* SASR */ 56 57 #include "proto.h" 58 59 /* 60 * Prototypes from add.c 61 */ 62 extern word gsm_mult P((word a, word b)); 63 extern longword gsm_L_mult P((word a, word b)); 64 extern word gsm_mult_r P((word a, word b)); 65 66 extern word gsm_div P((word num, word denum)); 67 68 extern word gsm_add P(( word a, word b )); 69 extern longword gsm_L_add P(( longword a, longword b )); 70 71 extern word gsm_sub P((word a, word b)); 72 extern longword gsm_L_sub P((longword a, longword b)); 73 74 extern word gsm_abs P((word a)); 75 76 extern word gsm_norm P(( longword a )); 77 78 extern longword gsm_L_asl P((longword a, int n)); 79 extern word gsm_asl P((word a, int n)); 80 81 extern longword gsm_L_asr P((longword a, int n)); 82 extern word gsm_asr P((word a, int n)); 83 84 /* 85 * Inlined functions from add.h 86 */ 87 88 /* 89 * #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \ 90 * (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15)) 91 */ 92 #define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */ \ 93 (SASR( ((longword)(a) * (longword)(b) + 16384), 15 )) 94 95 # define GSM_MULT(a,b) /* word a, word b, !(a == b == MIN_WORD) */ \ 96 (SASR( ((longword)(a) * (longword)(b)), 15 )) 97 98 # define GSM_L_MULT(a, b) /* word a, word b */ \ 99 (((longword)(a) * (longword)(b)) << 1) 100 101 # define GSM_L_ADD(a, b) \ 102 ( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \ 103 : (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \ 104 >= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \ 105 : ((b) <= 0 ? (a) + (b) \ 106 : (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \ 107 ? MAX_LONGWORD : utmp)) 108 109 /* 110 * # define GSM_ADD(a, b) \ 111 * ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \ 112 * ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp) 113 */ 114 /* Nonportable, but faster: */ 115 116 #define GSM_ADD(a, b) \ 117 ((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \ 118 MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp) 119 120 # define GSM_SUB(a, b) \ 121 ((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \ 122 ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp) 123 124 # define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a)) 125 126 /* Use these if necessary: 127 128 # define GSM_MULT_R(a, b) gsm_mult_r(a, b) 129 # define GSM_MULT(a, b) gsm_mult(a, b) 130 # define GSM_L_MULT(a, b) gsm_L_mult(a, b) 131 132 # define GSM_L_ADD(a, b) gsm_L_add(a, b) 133 # define GSM_ADD(a, b) gsm_add(a, b) 134 # define GSM_SUB(a, b) gsm_sub(a, b) 135 136 # define GSM_ABS(a) gsm_abs(a) 137 138 */ 139 140 /* 141 * More prototypes from implementations.. 142 */ 143 extern void Gsm_Coder P(( 144 struct gsm_state * S, 145 word * s, /* [0..159] samples IN */ 146 word * LARc, /* [0..7] LAR coefficients OUT */ 147 word * Nc, /* [0..3] LTP lag OUT */ 148 word * bc, /* [0..3] coded LTP gain OUT */ 149 word * Mc, /* [0..3] RPE grid selection OUT */ 150 word * xmaxc,/* [0..3] Coded maximum amplitude OUT */ 151 word * xMc /* [13*4] normalized RPE samples OUT */)); 152 153 extern void Gsm_Long_Term_Predictor P(( /* 4x for 160 samples */ 154 struct gsm_state * S, 155 word * d, /* [0..39] residual signal IN */ 156 word * dp, /* [-120..-1] d' IN */ 157 word * e, /* [0..40] OUT */ 158 word * dpp, /* [0..40] OUT */ 159 word * Nc, /* correlation lag OUT */ 160 word * bc /* gain factor OUT */)); 161 162 extern void Gsm_LPC_Analysis P(( 163 struct gsm_state * S, 164 word * s, /* 0..159 signals IN/OUT */ 165 word * LARc)); /* 0..7 LARc's OUT */ 166 167 extern void Gsm_Preprocess P(( 168 struct gsm_state * S, 169 word * s, word * so)); 170 171 extern void Gsm_Encoding P(( 172 struct gsm_state * S, 173 word * e, 174 word * ep, 175 word * xmaxc, 176 word * Mc, 177 word * xMc)); 178 179 extern void Gsm_Short_Term_Analysis_Filter P(( 180 struct gsm_state * S, 181 word * LARc, /* coded log area ratio [0..7] IN */ 182 word * d /* st res. signal [0..159] IN/OUT */)); 183 184 extern void Gsm_Decoder P(( 185 struct gsm_state * S, 186 word * LARcr, /* [0..7] IN */ 187 word * Ncr, /* [0..3] IN */ 188 word * bcr, /* [0..3] IN */ 189 word * Mcr, /* [0..3] IN */ 190 word * xmaxcr, /* [0..3] IN */ 191 word * xMcr, /* [0..13*4] IN */ 192 word * s)); /* [0..159] OUT */ 193 194 extern void Gsm_Decoding P(( 195 struct gsm_state * S, 196 word xmaxcr, 197 word Mcr, 198 word * xMcr, /* [0..12] IN */ 199 word * erp)); /* [0..39] OUT */ 200 201 extern void Gsm_Long_Term_Synthesis_Filtering P(( 202 struct gsm_state* S, 203 word Ncr, 204 word bcr, 205 word * erp, /* [0..39] IN */ 206 word * drp)); /* [-120..-1] IN, [0..40] OUT */ 207 208 void Gsm_RPE_Decoding P(( 209 struct gsm_state *S, 210 word xmaxcr, 211 word Mcr, 212 word * xMcr, /* [0..12], 3 bits IN */ 213 word * erp)); /* [0..39] OUT */ 214 215 void Gsm_RPE_Encoding P(( 216 struct gsm_state * S, 217 word * e, /* -5..-1][0..39][40..44 IN/OUT */ 218 word * xmaxc, /* OUT */ 219 word * Mc, /* OUT */ 220 word * xMc)); /* [0..12] OUT */ 221 222 extern void Gsm_Short_Term_Synthesis_Filter P(( 223 struct gsm_state * S, 224 word * LARcr, /* log area ratios [0..7] IN */ 225 word * drp, /* received d [0...39] IN */ 226 word * s)); /* signal s [0..159] OUT */ 227 228 extern void Gsm_Update_of_reconstructed_short_time_residual_signal P(( 229 word * dpp, /* [0...39] IN */ 230 word * ep, /* [0...39] IN */ 231 word * dp)); /* [-120...-1] IN/OUT */ 232 233 /* 234 * Tables from table.c 235 */ 236 #ifndef GSM_TABLE_C 237 238 extern const word gsm_A[8], gsm_B[8], gsm_MIC[8], gsm_MAC[8]; 239 extern const word gsm_INVA[8]; 240 extern const word gsm_DLB[4], gsm_QLB[4]; 241 extern const word gsm_H[11]; 242 extern const word gsm_NRFAC[8]; 243 extern const word gsm_FAC[8]; 244 245 #endif /* GSM_TABLE_C */ 246 247 /* 248 * Debugging 249 */ 250 #ifdef NDEBUG 251 252 # define gsm_debug_words(a, b, c, d) /* nil */ 253 # define gsm_debug_longwords(a, b, c, d) /* nil */ 254 # define gsm_debug_word(a, b) /* nil */ 255 # define gsm_debug_longword(a, b) /* nil */ 256 257 #else /* !NDEBUG => DEBUG */ 258 259 extern void gsm_debug_words P((char * name, int, int, word *)); 260 extern void gsm_debug_longwords P((char * name, int, int, longword *)); 261 extern void gsm_debug_longword P((char * name, longword)); 262 extern void gsm_debug_word P((char * name, word)); 263 264 #endif /* !NDEBUG */ 265 266 #include "unproto.h" 267 268 #endif /* PRIVATE_H */ 269