Alexandre Lision | 7c6f4a6 | 2013-09-05 13:27:01 -0400 | [diff] [blame] | 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 | #include "gsm610_priv.h" |
| 8 | |
| 9 | #include "gsm.h" |
| 10 | |
| 11 | int gsm_decode (gsm s, gsm_byte * c, gsm_signal * target) |
| 12 | { |
| 13 | word LARc[8], Nc[4], Mc[4], bc[4], xmaxc[4], xmc[13*4]; |
| 14 | |
| 15 | #ifdef WAV49 |
| 16 | if (s->wav_fmt) { |
| 17 | |
| 18 | uword sr = 0; |
| 19 | |
| 20 | s->frame_index = !s->frame_index; |
| 21 | if (s->frame_index) { |
| 22 | |
| 23 | sr = *c++; |
| 24 | LARc[0] = sr & 0x3f; sr >>= 6; |
| 25 | sr |= (uword)*c++ << 2; |
| 26 | LARc[1] = sr & 0x3f; sr >>= 6; |
| 27 | sr |= (uword)*c++ << 4; |
| 28 | LARc[2] = sr & 0x1f; sr >>= 5; |
| 29 | LARc[3] = sr & 0x1f; sr >>= 5; |
| 30 | sr |= (uword)*c++ << 2; |
| 31 | LARc[4] = sr & 0xf; sr >>= 4; |
| 32 | LARc[5] = sr & 0xf; sr >>= 4; |
| 33 | sr |= (uword)*c++ << 2; /* 5 */ |
| 34 | LARc[6] = sr & 0x7; sr >>= 3; |
| 35 | LARc[7] = sr & 0x7; sr >>= 3; |
| 36 | sr |= (uword)*c++ << 4; |
| 37 | Nc[0] = sr & 0x7f; sr >>= 7; |
| 38 | bc[0] = sr & 0x3; sr >>= 2; |
| 39 | Mc[0] = sr & 0x3; sr >>= 2; |
| 40 | sr |= (uword)*c++ << 1; |
| 41 | xmaxc[0] = sr & 0x3f; sr >>= 6; |
| 42 | xmc[0] = sr & 0x7; sr >>= 3; |
| 43 | sr = *c++; |
| 44 | xmc[1] = sr & 0x7; sr >>= 3; |
| 45 | xmc[2] = sr & 0x7; sr >>= 3; |
| 46 | sr |= (uword)*c++ << 2; |
| 47 | xmc[3] = sr & 0x7; sr >>= 3; |
| 48 | xmc[4] = sr & 0x7; sr >>= 3; |
| 49 | xmc[5] = sr & 0x7; sr >>= 3; |
| 50 | sr |= (uword)*c++ << 1; /* 10 */ |
| 51 | xmc[6] = sr & 0x7; sr >>= 3; |
| 52 | xmc[7] = sr & 0x7; sr >>= 3; |
| 53 | xmc[8] = sr & 0x7; sr >>= 3; |
| 54 | sr = *c++; |
| 55 | xmc[9] = sr & 0x7; sr >>= 3; |
| 56 | xmc[10] = sr & 0x7; sr >>= 3; |
| 57 | sr |= (uword)*c++ << 2; |
| 58 | xmc[11] = sr & 0x7; sr >>= 3; |
| 59 | xmc[12] = sr & 0x7; sr >>= 3; |
| 60 | sr |= (uword)*c++ << 4; |
| 61 | Nc[1] = sr & 0x7f; sr >>= 7; |
| 62 | bc[1] = sr & 0x3; sr >>= 2; |
| 63 | Mc[1] = sr & 0x3; sr >>= 2; |
| 64 | sr |= (uword)*c++ << 1; |
| 65 | xmaxc[1] = sr & 0x3f; sr >>= 6; |
| 66 | xmc[13] = sr & 0x7; sr >>= 3; |
| 67 | sr = *c++; /* 15 */ |
| 68 | xmc[14] = sr & 0x7; sr >>= 3; |
| 69 | xmc[15] = sr & 0x7; sr >>= 3; |
| 70 | sr |= (uword)*c++ << 2; |
| 71 | xmc[16] = sr & 0x7; sr >>= 3; |
| 72 | xmc[17] = sr & 0x7; sr >>= 3; |
| 73 | xmc[18] = sr & 0x7; sr >>= 3; |
| 74 | sr |= (uword)*c++ << 1; |
| 75 | xmc[19] = sr & 0x7; sr >>= 3; |
| 76 | xmc[20] = sr & 0x7; sr >>= 3; |
| 77 | xmc[21] = sr & 0x7; sr >>= 3; |
| 78 | sr = *c++; |
| 79 | xmc[22] = sr & 0x7; sr >>= 3; |
| 80 | xmc[23] = sr & 0x7; sr >>= 3; |
| 81 | sr |= (uword)*c++ << 2; |
| 82 | xmc[24] = sr & 0x7; sr >>= 3; |
| 83 | xmc[25] = sr & 0x7; sr >>= 3; |
| 84 | sr |= (uword)*c++ << 4; /* 20 */ |
| 85 | Nc[2] = sr & 0x7f; sr >>= 7; |
| 86 | bc[2] = sr & 0x3; sr >>= 2; |
| 87 | Mc[2] = sr & 0x3; sr >>= 2; |
| 88 | sr |= (uword)*c++ << 1; |
| 89 | xmaxc[2] = sr & 0x3f; sr >>= 6; |
| 90 | xmc[26] = sr & 0x7; sr >>= 3; |
| 91 | sr = *c++; |
| 92 | xmc[27] = sr & 0x7; sr >>= 3; |
| 93 | xmc[28] = sr & 0x7; sr >>= 3; |
| 94 | sr |= (uword)*c++ << 2; |
| 95 | xmc[29] = sr & 0x7; sr >>= 3; |
| 96 | xmc[30] = sr & 0x7; sr >>= 3; |
| 97 | xmc[31] = sr & 0x7; sr >>= 3; |
| 98 | sr |= (uword)*c++ << 1; |
| 99 | xmc[32] = sr & 0x7; sr >>= 3; |
| 100 | xmc[33] = sr & 0x7; sr >>= 3; |
| 101 | xmc[34] = sr & 0x7; sr >>= 3; |
| 102 | sr = *c++; /* 25 */ |
| 103 | xmc[35] = sr & 0x7; sr >>= 3; |
| 104 | xmc[36] = sr & 0x7; sr >>= 3; |
| 105 | sr |= (uword)*c++ << 2; |
| 106 | xmc[37] = sr & 0x7; sr >>= 3; |
| 107 | xmc[38] = sr & 0x7; sr >>= 3; |
| 108 | sr |= (uword)*c++ << 4; |
| 109 | Nc[3] = sr & 0x7f; sr >>= 7; |
| 110 | bc[3] = sr & 0x3; sr >>= 2; |
| 111 | Mc[3] = sr & 0x3; sr >>= 2; |
| 112 | sr |= (uword)*c++ << 1; |
| 113 | xmaxc[3] = sr & 0x3f; sr >>= 6; |
| 114 | xmc[39] = sr & 0x7; sr >>= 3; |
| 115 | sr = *c++; |
| 116 | xmc[40] = sr & 0x7; sr >>= 3; |
| 117 | xmc[41] = sr & 0x7; sr >>= 3; |
| 118 | sr |= (uword)*c++ << 2; /* 30 */ |
| 119 | xmc[42] = sr & 0x7; sr >>= 3; |
| 120 | xmc[43] = sr & 0x7; sr >>= 3; |
| 121 | xmc[44] = sr & 0x7; sr >>= 3; |
| 122 | sr |= (uword)*c++ << 1; |
| 123 | xmc[45] = sr & 0x7; sr >>= 3; |
| 124 | xmc[46] = sr & 0x7; sr >>= 3; |
| 125 | xmc[47] = sr & 0x7; sr >>= 3; |
| 126 | sr = *c++; |
| 127 | xmc[48] = sr & 0x7; sr >>= 3; |
| 128 | xmc[49] = sr & 0x7; sr >>= 3; |
| 129 | sr |= (uword)*c++ << 2; |
| 130 | xmc[50] = sr & 0x7; sr >>= 3; |
| 131 | xmc[51] = sr & 0x7; sr >>= 3; |
| 132 | |
| 133 | s->frame_chain = sr & 0xf; |
| 134 | } |
| 135 | else { |
| 136 | sr = s->frame_chain; |
| 137 | sr |= (uword)*c++ << 4; /* 1 */ |
| 138 | LARc[0] = sr & 0x3f; sr >>= 6; |
| 139 | LARc[1] = sr & 0x3f; sr >>= 6; |
| 140 | sr = *c++; |
| 141 | LARc[2] = sr & 0x1f; sr >>= 5; |
| 142 | sr |= (uword)*c++ << 3; |
| 143 | LARc[3] = sr & 0x1f; sr >>= 5; |
| 144 | LARc[4] = sr & 0xf; sr >>= 4; |
| 145 | sr |= (uword)*c++ << 2; |
| 146 | LARc[5] = sr & 0xf; sr >>= 4; |
| 147 | LARc[6] = sr & 0x7; sr >>= 3; |
| 148 | LARc[7] = sr & 0x7; sr >>= 3; |
| 149 | sr = *c++; /* 5 */ |
| 150 | Nc[0] = sr & 0x7f; sr >>= 7; |
| 151 | sr |= (uword)*c++ << 1; |
| 152 | bc[0] = sr & 0x3; sr >>= 2; |
| 153 | Mc[0] = sr & 0x3; sr >>= 2; |
| 154 | sr |= (uword)*c++ << 5; |
| 155 | xmaxc[0] = sr & 0x3f; sr >>= 6; |
| 156 | xmc[0] = sr & 0x7; sr >>= 3; |
| 157 | xmc[1] = sr & 0x7; sr >>= 3; |
| 158 | sr |= (uword)*c++ << 1; |
| 159 | xmc[2] = sr & 0x7; sr >>= 3; |
| 160 | xmc[3] = sr & 0x7; sr >>= 3; |
| 161 | xmc[4] = sr & 0x7; sr >>= 3; |
| 162 | sr = *c++; |
| 163 | xmc[5] = sr & 0x7; sr >>= 3; |
| 164 | xmc[6] = sr & 0x7; sr >>= 3; |
| 165 | sr |= (uword)*c++ << 2; /* 10 */ |
| 166 | xmc[7] = sr & 0x7; sr >>= 3; |
| 167 | xmc[8] = sr & 0x7; sr >>= 3; |
| 168 | xmc[9] = sr & 0x7; sr >>= 3; |
| 169 | sr |= (uword)*c++ << 1; |
| 170 | xmc[10] = sr & 0x7; sr >>= 3; |
| 171 | xmc[11] = sr & 0x7; sr >>= 3; |
| 172 | xmc[12] = sr & 0x7; sr >>= 3; |
| 173 | sr = *c++; |
| 174 | Nc[1] = sr & 0x7f; sr >>= 7; |
| 175 | sr |= (uword)*c++ << 1; |
| 176 | bc[1] = sr & 0x3; sr >>= 2; |
| 177 | Mc[1] = sr & 0x3; sr >>= 2; |
| 178 | sr |= (uword)*c++ << 5; |
| 179 | xmaxc[1] = sr & 0x3f; sr >>= 6; |
| 180 | xmc[13] = sr & 0x7; sr >>= 3; |
| 181 | xmc[14] = sr & 0x7; sr >>= 3; |
| 182 | sr |= (uword)*c++ << 1; /* 15 */ |
| 183 | xmc[15] = sr & 0x7; sr >>= 3; |
| 184 | xmc[16] = sr & 0x7; sr >>= 3; |
| 185 | xmc[17] = sr & 0x7; sr >>= 3; |
| 186 | sr = *c++; |
| 187 | xmc[18] = sr & 0x7; sr >>= 3; |
| 188 | xmc[19] = sr & 0x7; sr >>= 3; |
| 189 | sr |= (uword)*c++ << 2; |
| 190 | xmc[20] = sr & 0x7; sr >>= 3; |
| 191 | xmc[21] = sr & 0x7; sr >>= 3; |
| 192 | xmc[22] = sr & 0x7; sr >>= 3; |
| 193 | sr |= (uword)*c++ << 1; |
| 194 | xmc[23] = sr & 0x7; sr >>= 3; |
| 195 | xmc[24] = sr & 0x7; sr >>= 3; |
| 196 | xmc[25] = sr & 0x7; sr >>= 3; |
| 197 | sr = *c++; |
| 198 | Nc[2] = sr & 0x7f; sr >>= 7; |
| 199 | sr |= (uword)*c++ << 1; /* 20 */ |
| 200 | bc[2] = sr & 0x3; sr >>= 2; |
| 201 | Mc[2] = sr & 0x3; sr >>= 2; |
| 202 | sr |= (uword)*c++ << 5; |
| 203 | xmaxc[2] = sr & 0x3f; sr >>= 6; |
| 204 | xmc[26] = sr & 0x7; sr >>= 3; |
| 205 | xmc[27] = sr & 0x7; sr >>= 3; |
| 206 | sr |= (uword)*c++ << 1; |
| 207 | xmc[28] = sr & 0x7; sr >>= 3; |
| 208 | xmc[29] = sr & 0x7; sr >>= 3; |
| 209 | xmc[30] = sr & 0x7; sr >>= 3; |
| 210 | sr = *c++; |
| 211 | xmc[31] = sr & 0x7; sr >>= 3; |
| 212 | xmc[32] = sr & 0x7; sr >>= 3; |
| 213 | sr |= (uword)*c++ << 2; |
| 214 | xmc[33] = sr & 0x7; sr >>= 3; |
| 215 | xmc[34] = sr & 0x7; sr >>= 3; |
| 216 | xmc[35] = sr & 0x7; sr >>= 3; |
| 217 | sr |= (uword)*c++ << 1; /* 25 */ |
| 218 | xmc[36] = sr & 0x7; sr >>= 3; |
| 219 | xmc[37] = sr & 0x7; sr >>= 3; |
| 220 | xmc[38] = sr & 0x7; sr >>= 3; |
| 221 | sr = *c++; |
| 222 | Nc[3] = sr & 0x7f; sr >>= 7; |
| 223 | sr |= (uword)*c++ << 1; |
| 224 | bc[3] = sr & 0x3; sr >>= 2; |
| 225 | Mc[3] = sr & 0x3; sr >>= 2; |
| 226 | sr |= (uword)*c++ << 5; |
| 227 | xmaxc[3] = sr & 0x3f; sr >>= 6; |
| 228 | xmc[39] = sr & 0x7; sr >>= 3; |
| 229 | xmc[40] = sr & 0x7; sr >>= 3; |
| 230 | sr |= (uword)*c++ << 1; |
| 231 | xmc[41] = sr & 0x7; sr >>= 3; |
| 232 | xmc[42] = sr & 0x7; sr >>= 3; |
| 233 | xmc[43] = sr & 0x7; sr >>= 3; |
| 234 | sr = *c++; /* 30 */ |
| 235 | xmc[44] = sr & 0x7; sr >>= 3; |
| 236 | xmc[45] = sr & 0x7; sr >>= 3; |
| 237 | sr |= (uword)*c++ << 2; |
| 238 | xmc[46] = sr & 0x7; sr >>= 3; |
| 239 | xmc[47] = sr & 0x7; sr >>= 3; |
| 240 | xmc[48] = sr & 0x7; sr >>= 3; |
| 241 | sr |= (uword)*c++ << 1; |
| 242 | xmc[49] = sr & 0x7; sr >>= 3; |
| 243 | xmc[50] = sr & 0x7; sr >>= 3; |
| 244 | xmc[51] = sr & 0x7; sr >>= 3; |
| 245 | } |
| 246 | } |
| 247 | else |
| 248 | #endif |
| 249 | { |
| 250 | /* GSM_MAGIC = (*c >> 4) & 0xF; */ |
| 251 | |
| 252 | if (((*c >> 4) & 0x0F) != GSM_MAGIC) return -1; |
| 253 | |
| 254 | LARc[0] = (*c++ & 0xF) << 2; /* 1 */ |
| 255 | LARc[0] |= (*c >> 6) & 0x3; |
| 256 | LARc[1] = *c++ & 0x3F; |
| 257 | LARc[2] = (*c >> 3) & 0x1F; |
| 258 | LARc[3] = (*c++ & 0x7) << 2; |
| 259 | LARc[3] |= (*c >> 6) & 0x3; |
| 260 | LARc[4] = (*c >> 2) & 0xF; |
| 261 | LARc[5] = (*c++ & 0x3) << 2; |
| 262 | LARc[5] |= (*c >> 6) & 0x3; |
| 263 | LARc[6] = (*c >> 3) & 0x7; |
| 264 | LARc[7] = *c++ & 0x7; |
| 265 | Nc[0] = (*c >> 1) & 0x7F; |
| 266 | bc[0] = (*c++ & 0x1) << 1; |
| 267 | bc[0] |= (*c >> 7) & 0x1; |
| 268 | Mc[0] = (*c >> 5) & 0x3; |
| 269 | xmaxc[0] = (*c++ & 0x1F) << 1; |
| 270 | xmaxc[0] |= (*c >> 7) & 0x1; |
| 271 | xmc[0] = (*c >> 4) & 0x7; |
| 272 | xmc[1] = (*c >> 1) & 0x7; |
| 273 | xmc[2] = (*c++ & 0x1) << 2; |
| 274 | xmc[2] |= (*c >> 6) & 0x3; |
| 275 | xmc[3] = (*c >> 3) & 0x7; |
| 276 | xmc[4] = *c++ & 0x7; |
| 277 | xmc[5] = (*c >> 5) & 0x7; |
| 278 | xmc[6] = (*c >> 2) & 0x7; |
| 279 | xmc[7] = (*c++ & 0x3) << 1; /* 10 */ |
| 280 | xmc[7] |= (*c >> 7) & 0x1; |
| 281 | xmc[8] = (*c >> 4) & 0x7; |
| 282 | xmc[9] = (*c >> 1) & 0x7; |
| 283 | xmc[10] = (*c++ & 0x1) << 2; |
| 284 | xmc[10] |= (*c >> 6) & 0x3; |
| 285 | xmc[11] = (*c >> 3) & 0x7; |
| 286 | xmc[12] = *c++ & 0x7; |
| 287 | Nc[1] = (*c >> 1) & 0x7F; |
| 288 | bc[1] = (*c++ & 0x1) << 1; |
| 289 | bc[1] |= (*c >> 7) & 0x1; |
| 290 | Mc[1] = (*c >> 5) & 0x3; |
| 291 | xmaxc[1] = (*c++ & 0x1F) << 1; |
| 292 | xmaxc[1] |= (*c >> 7) & 0x1; |
| 293 | xmc[13] = (*c >> 4) & 0x7; |
| 294 | xmc[14] = (*c >> 1) & 0x7; |
| 295 | xmc[15] = (*c++ & 0x1) << 2; |
| 296 | xmc[15] |= (*c >> 6) & 0x3; |
| 297 | xmc[16] = (*c >> 3) & 0x7; |
| 298 | xmc[17] = *c++ & 0x7; |
| 299 | xmc[18] = (*c >> 5) & 0x7; |
| 300 | xmc[19] = (*c >> 2) & 0x7; |
| 301 | xmc[20] = (*c++ & 0x3) << 1; |
| 302 | xmc[20] |= (*c >> 7) & 0x1; |
| 303 | xmc[21] = (*c >> 4) & 0x7; |
| 304 | xmc[22] = (*c >> 1) & 0x7; |
| 305 | xmc[23] = (*c++ & 0x1) << 2; |
| 306 | xmc[23] |= (*c >> 6) & 0x3; |
| 307 | xmc[24] = (*c >> 3) & 0x7; |
| 308 | xmc[25] = *c++ & 0x7; |
| 309 | Nc[2] = (*c >> 1) & 0x7F; |
| 310 | bc[2] = (*c++ & 0x1) << 1; /* 20 */ |
| 311 | bc[2] |= (*c >> 7) & 0x1; |
| 312 | Mc[2] = (*c >> 5) & 0x3; |
| 313 | xmaxc[2] = (*c++ & 0x1F) << 1; |
| 314 | xmaxc[2] |= (*c >> 7) & 0x1; |
| 315 | xmc[26] = (*c >> 4) & 0x7; |
| 316 | xmc[27] = (*c >> 1) & 0x7; |
| 317 | xmc[28] = (*c++ & 0x1) << 2; |
| 318 | xmc[28] |= (*c >> 6) & 0x3; |
| 319 | xmc[29] = (*c >> 3) & 0x7; |
| 320 | xmc[30] = *c++ & 0x7; |
| 321 | xmc[31] = (*c >> 5) & 0x7; |
| 322 | xmc[32] = (*c >> 2) & 0x7; |
| 323 | xmc[33] = (*c++ & 0x3) << 1; |
| 324 | xmc[33] |= (*c >> 7) & 0x1; |
| 325 | xmc[34] = (*c >> 4) & 0x7; |
| 326 | xmc[35] = (*c >> 1) & 0x7; |
| 327 | xmc[36] = (*c++ & 0x1) << 2; |
| 328 | xmc[36] |= (*c >> 6) & 0x3; |
| 329 | xmc[37] = (*c >> 3) & 0x7; |
| 330 | xmc[38] = *c++ & 0x7; |
| 331 | Nc[3] = (*c >> 1) & 0x7F; |
| 332 | bc[3] = (*c++ & 0x1) << 1; |
| 333 | bc[3] |= (*c >> 7) & 0x1; |
| 334 | Mc[3] = (*c >> 5) & 0x3; |
| 335 | xmaxc[3] = (*c++ & 0x1F) << 1; |
| 336 | xmaxc[3] |= (*c >> 7) & 0x1; |
| 337 | xmc[39] = (*c >> 4) & 0x7; |
| 338 | xmc[40] = (*c >> 1) & 0x7; |
| 339 | xmc[41] = (*c++ & 0x1) << 2; |
| 340 | xmc[41] |= (*c >> 6) & 0x3; |
| 341 | xmc[42] = (*c >> 3) & 0x7; |
| 342 | xmc[43] = *c++ & 0x7; /* 30 */ |
| 343 | xmc[44] = (*c >> 5) & 0x7; |
| 344 | xmc[45] = (*c >> 2) & 0x7; |
| 345 | xmc[46] = (*c++ & 0x3) << 1; |
| 346 | xmc[46] |= (*c >> 7) & 0x1; |
| 347 | xmc[47] = (*c >> 4) & 0x7; |
| 348 | xmc[48] = (*c >> 1) & 0x7; |
| 349 | xmc[49] = (*c++ & 0x1) << 2; |
| 350 | xmc[49] |= (*c >> 6) & 0x3; |
| 351 | xmc[50] = (*c >> 3) & 0x7; |
| 352 | xmc[51] = *c & 0x7; /* 33 */ |
| 353 | } |
| 354 | |
| 355 | Gsm_Decoder(s, LARc, Nc, bc, Mc, xmaxc, xmc, target); |
| 356 | |
| 357 | return 0; |
| 358 | } |
| 359 | |