| 1 | /* |
| 2 | * Copyright (c) 2001-2003 The FFmpeg Project |
| 3 | * |
| 4 | * first version by Francois Revol (revol@free.fr) |
| 5 | * fringe ADPCM codecs (e.g., DK3, DK4, Westwood) |
| 6 | * by Mike Melanson (melanson@pcisys.net) |
| 7 | * CD-ROM XA ADPCM codec by BERO |
| 8 | * EA ADPCM decoder by Robin Kay (komadori@myrealbox.com) |
| 9 | * EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org) |
| 10 | * EA IMA EACS decoder by Peter Ross (pross@xvid.org) |
| 11 | * EA IMA SEAD decoder by Peter Ross (pross@xvid.org) |
| 12 | * EA ADPCM XAS decoder by Peter Ross (pross@xvid.org) |
| 13 | * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com) |
| 14 | * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl) |
| 15 | * |
| 16 | * This file is part of FFmpeg. |
| 17 | * |
| 18 | * FFmpeg is free software; you can redistribute it and/or |
| 19 | * modify it under the terms of the GNU Lesser General Public |
| 20 | * License as published by the Free Software Foundation; either |
| 21 | * version 2.1 of the License, or (at your option) any later version. |
| 22 | * |
| 23 | * FFmpeg is distributed in the hope that it will be useful, |
| 24 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 25 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 26 | * Lesser General Public License for more details. |
| 27 | * |
| 28 | * You should have received a copy of the GNU Lesser General Public |
| 29 | * License along with FFmpeg; if not, write to the Free Software |
| 30 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 31 | */ |
| 32 | #include "avcodec.h" |
| 33 | #include "get_bits.h" |
| 34 | #include "bytestream.h" |
| 35 | #include "adpcm.h" |
| 36 | #include "adpcm_data.h" |
| 37 | #include "internal.h" |
| 38 | |
| 39 | /** |
| 40 | * @file |
| 41 | * ADPCM decoders |
| 42 | * Features and limitations: |
| 43 | * |
| 44 | * Reference documents: |
| 45 | * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs |
| 46 | * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead] |
| 47 | * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead] |
| 48 | * http://openquicktime.sourceforge.net/ |
| 49 | * XAnim sources (xa_codec.c) http://xanim.polter.net/ |
| 50 | * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead] |
| 51 | * SoX source code http://sox.sourceforge.net/ |
| 52 | * |
| 53 | * CD-ROM XA: |
| 54 | * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead] |
| 55 | * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead] |
| 56 | * readstr http://www.geocities.co.jp/Playtown/2004/ |
| 57 | */ |
| 58 | |
| 59 | /* These are for CD-ROM XA ADPCM */ |
| 60 | static const int xa_adpcm_table[5][2] = { |
| 61 | { 0, 0 }, |
| 62 | { 60, 0 }, |
| 63 | { 115, -52 }, |
| 64 | { 98, -55 }, |
| 65 | { 122, -60 } |
| 66 | }; |
| 67 | |
| 68 | static const int ea_adpcm_table[] = { |
| 69 | 0, 240, 460, 392, |
| 70 | 0, 0, -208, -220, |
| 71 | 0, 1, 3, 4, |
| 72 | 7, 8, 10, 11, |
| 73 | 0, -1, -3, -4 |
| 74 | }; |
| 75 | |
| 76 | // padded to zero where table size is less then 16 |
| 77 | static const int swf_index_tables[4][16] = { |
| 78 | /*2*/ { -1, 2 }, |
| 79 | /*3*/ { -1, -1, 2, 4 }, |
| 80 | /*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 }, |
| 81 | /*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 } |
| 82 | }; |
| 83 | |
| 84 | /* end of tables */ |
| 85 | |
| 86 | typedef struct ADPCMDecodeContext { |
| 87 | ADPCMChannelStatus status[6]; |
| 88 | int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */ |
| 89 | } ADPCMDecodeContext; |
| 90 | |
| 91 | static av_cold int adpcm_decode_init(AVCodecContext * avctx) |
| 92 | { |
| 93 | ADPCMDecodeContext *c = avctx->priv_data; |
| 94 | unsigned int min_channels = 1; |
| 95 | unsigned int max_channels = 2; |
| 96 | |
| 97 | switch(avctx->codec->id) { |
| 98 | case AV_CODEC_ID_ADPCM_DTK: |
| 99 | case AV_CODEC_ID_ADPCM_EA: |
| 100 | min_channels = 2; |
| 101 | break; |
| 102 | case AV_CODEC_ID_ADPCM_AFC: |
| 103 | case AV_CODEC_ID_ADPCM_EA_R1: |
| 104 | case AV_CODEC_ID_ADPCM_EA_R2: |
| 105 | case AV_CODEC_ID_ADPCM_EA_R3: |
| 106 | case AV_CODEC_ID_ADPCM_EA_XAS: |
| 107 | case AV_CODEC_ID_ADPCM_THP: |
| 108 | max_channels = 6; |
| 109 | break; |
| 110 | } |
| 111 | if (avctx->channels < min_channels || avctx->channels > max_channels) { |
| 112 | av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n"); |
| 113 | return AVERROR(EINVAL); |
| 114 | } |
| 115 | |
| 116 | switch(avctx->codec->id) { |
| 117 | case AV_CODEC_ID_ADPCM_CT: |
| 118 | c->status[0].step = c->status[1].step = 511; |
| 119 | break; |
| 120 | case AV_CODEC_ID_ADPCM_IMA_WAV: |
| 121 | if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5) |
| 122 | return AVERROR_INVALIDDATA; |
| 123 | break; |
| 124 | case AV_CODEC_ID_ADPCM_IMA_APC: |
| 125 | if (avctx->extradata && avctx->extradata_size >= 8) { |
| 126 | c->status[0].predictor = AV_RL32(avctx->extradata); |
| 127 | c->status[1].predictor = AV_RL32(avctx->extradata + 4); |
| 128 | } |
| 129 | break; |
| 130 | case AV_CODEC_ID_ADPCM_IMA_WS: |
| 131 | if (avctx->extradata && avctx->extradata_size >= 2) |
| 132 | c->vqa_version = AV_RL16(avctx->extradata); |
| 133 | break; |
| 134 | default: |
| 135 | break; |
| 136 | } |
| 137 | |
| 138 | switch(avctx->codec->id) { |
| 139 | case AV_CODEC_ID_ADPCM_IMA_QT: |
| 140 | case AV_CODEC_ID_ADPCM_IMA_WAV: |
| 141 | case AV_CODEC_ID_ADPCM_4XM: |
| 142 | case AV_CODEC_ID_ADPCM_XA: |
| 143 | case AV_CODEC_ID_ADPCM_EA_R1: |
| 144 | case AV_CODEC_ID_ADPCM_EA_R2: |
| 145 | case AV_CODEC_ID_ADPCM_EA_R3: |
| 146 | case AV_CODEC_ID_ADPCM_EA_XAS: |
| 147 | case AV_CODEC_ID_ADPCM_THP: |
| 148 | case AV_CODEC_ID_ADPCM_AFC: |
| 149 | case AV_CODEC_ID_ADPCM_DTK: |
| 150 | avctx->sample_fmt = AV_SAMPLE_FMT_S16P; |
| 151 | break; |
| 152 | case AV_CODEC_ID_ADPCM_IMA_WS: |
| 153 | avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P : |
| 154 | AV_SAMPLE_FMT_S16; |
| 155 | break; |
| 156 | default: |
| 157 | avctx->sample_fmt = AV_SAMPLE_FMT_S16; |
| 158 | } |
| 159 | |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | static inline short adpcm_ima_expand_nibble(ADPCMChannelStatus *c, char nibble, int shift) |
| 164 | { |
| 165 | int step_index; |
| 166 | int predictor; |
| 167 | int sign, delta, diff, step; |
| 168 | |
| 169 | step = ff_adpcm_step_table[c->step_index]; |
| 170 | step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble]; |
| 171 | step_index = av_clip(step_index, 0, 88); |
| 172 | |
| 173 | sign = nibble & 8; |
| 174 | delta = nibble & 7; |
| 175 | /* perform direct multiplication instead of series of jumps proposed by |
| 176 | * the reference ADPCM implementation since modern CPUs can do the mults |
| 177 | * quickly enough */ |
| 178 | diff = ((2 * delta + 1) * step) >> shift; |
| 179 | predictor = c->predictor; |
| 180 | if (sign) predictor -= diff; |
| 181 | else predictor += diff; |
| 182 | |
| 183 | c->predictor = av_clip_int16(predictor); |
| 184 | c->step_index = step_index; |
| 185 | |
| 186 | return (short)c->predictor; |
| 187 | } |
| 188 | |
| 189 | static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps) |
| 190 | { |
| 191 | int nibble, step_index, predictor, sign, delta, diff, step, shift; |
| 192 | |
| 193 | shift = bps - 1; |
| 194 | nibble = get_bits_le(gb, bps), |
| 195 | step = ff_adpcm_step_table[c->step_index]; |
| 196 | step_index = c->step_index + ff_adpcm_index_tables[bps - 2][nibble]; |
| 197 | step_index = av_clip(step_index, 0, 88); |
| 198 | |
| 199 | sign = nibble & (1 << shift); |
| 200 | delta = nibble & ((1 << shift) - 1); |
| 201 | diff = ((2 * delta + 1) * step) >> shift; |
| 202 | predictor = c->predictor; |
| 203 | if (sign) predictor -= diff; |
| 204 | else predictor += diff; |
| 205 | |
| 206 | c->predictor = av_clip_int16(predictor); |
| 207 | c->step_index = step_index; |
| 208 | |
| 209 | return (int16_t)c->predictor; |
| 210 | } |
| 211 | |
| 212 | static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble, int shift) |
| 213 | { |
| 214 | int step_index; |
| 215 | int predictor; |
| 216 | int diff, step; |
| 217 | |
| 218 | step = ff_adpcm_step_table[c->step_index]; |
| 219 | step_index = c->step_index + ff_adpcm_index_table[nibble]; |
| 220 | step_index = av_clip(step_index, 0, 88); |
| 221 | |
| 222 | diff = step >> 3; |
| 223 | if (nibble & 4) diff += step; |
| 224 | if (nibble & 2) diff += step >> 1; |
| 225 | if (nibble & 1) diff += step >> 2; |
| 226 | |
| 227 | if (nibble & 8) |
| 228 | predictor = c->predictor - diff; |
| 229 | else |
| 230 | predictor = c->predictor + diff; |
| 231 | |
| 232 | c->predictor = av_clip_int16(predictor); |
| 233 | c->step_index = step_index; |
| 234 | |
| 235 | return c->predictor; |
| 236 | } |
| 237 | |
| 238 | static inline short adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble) |
| 239 | { |
| 240 | int predictor; |
| 241 | |
| 242 | predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64; |
| 243 | predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta; |
| 244 | |
| 245 | c->sample2 = c->sample1; |
| 246 | c->sample1 = av_clip_int16(predictor); |
| 247 | c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8; |
| 248 | if (c->idelta < 16) c->idelta = 16; |
| 249 | |
| 250 | return c->sample1; |
| 251 | } |
| 252 | |
| 253 | static inline short adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble) |
| 254 | { |
| 255 | int step_index, predictor, sign, delta, diff, step; |
| 256 | |
| 257 | step = ff_adpcm_oki_step_table[c->step_index]; |
| 258 | step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble]; |
| 259 | step_index = av_clip(step_index, 0, 48); |
| 260 | |
| 261 | sign = nibble & 8; |
| 262 | delta = nibble & 7; |
| 263 | diff = ((2 * delta + 1) * step) >> 3; |
| 264 | predictor = c->predictor; |
| 265 | if (sign) predictor -= diff; |
| 266 | else predictor += diff; |
| 267 | |
| 268 | c->predictor = av_clip(predictor, -2048, 2047); |
| 269 | c->step_index = step_index; |
| 270 | |
| 271 | return c->predictor << 4; |
| 272 | } |
| 273 | |
| 274 | static inline short adpcm_ct_expand_nibble(ADPCMChannelStatus *c, char nibble) |
| 275 | { |
| 276 | int sign, delta, diff; |
| 277 | int new_step; |
| 278 | |
| 279 | sign = nibble & 8; |
| 280 | delta = nibble & 7; |
| 281 | /* perform direct multiplication instead of series of jumps proposed by |
| 282 | * the reference ADPCM implementation since modern CPUs can do the mults |
| 283 | * quickly enough */ |
| 284 | diff = ((2 * delta + 1) * c->step) >> 3; |
| 285 | /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */ |
| 286 | c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff); |
| 287 | c->predictor = av_clip_int16(c->predictor); |
| 288 | /* calculate new step and clamp it to range 511..32767 */ |
| 289 | new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8; |
| 290 | c->step = av_clip(new_step, 511, 32767); |
| 291 | |
| 292 | return (short)c->predictor; |
| 293 | } |
| 294 | |
| 295 | static inline short adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, char nibble, int size, int shift) |
| 296 | { |
| 297 | int sign, delta, diff; |
| 298 | |
| 299 | sign = nibble & (1<<(size-1)); |
| 300 | delta = nibble & ((1<<(size-1))-1); |
| 301 | diff = delta << (7 + c->step + shift); |
| 302 | |
| 303 | /* clamp result */ |
| 304 | c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256); |
| 305 | |
| 306 | /* calculate new step */ |
| 307 | if (delta >= (2*size - 3) && c->step < 3) |
| 308 | c->step++; |
| 309 | else if (delta == 0 && c->step > 0) |
| 310 | c->step--; |
| 311 | |
| 312 | return (short) c->predictor; |
| 313 | } |
| 314 | |
| 315 | static inline short adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, unsigned char nibble) |
| 316 | { |
| 317 | if(!c->step) { |
| 318 | c->predictor = 0; |
| 319 | c->step = 127; |
| 320 | } |
| 321 | |
| 322 | c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8; |
| 323 | c->predictor = av_clip_int16(c->predictor); |
| 324 | c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8; |
| 325 | c->step = av_clip(c->step, 127, 24567); |
| 326 | return c->predictor; |
| 327 | } |
| 328 | |
| 329 | static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1, |
| 330 | const uint8_t *in, ADPCMChannelStatus *left, |
| 331 | ADPCMChannelStatus *right, int channels, int sample_offset) |
| 332 | { |
| 333 | int i, j; |
| 334 | int shift,filter,f0,f1; |
| 335 | int s_1,s_2; |
| 336 | int d,s,t; |
| 337 | |
| 338 | out0 += sample_offset; |
| 339 | if (channels == 1) |
| 340 | out1 = out0 + 28; |
| 341 | else |
| 342 | out1 += sample_offset; |
| 343 | |
| 344 | for(i=0;i<4;i++) { |
| 345 | shift = 12 - (in[4+i*2] & 15); |
| 346 | filter = in[4+i*2] >> 4; |
| 347 | if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) { |
| 348 | avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter); |
| 349 | filter=0; |
| 350 | } |
| 351 | f0 = xa_adpcm_table[filter][0]; |
| 352 | f1 = xa_adpcm_table[filter][1]; |
| 353 | |
| 354 | s_1 = left->sample1; |
| 355 | s_2 = left->sample2; |
| 356 | |
| 357 | for(j=0;j<28;j++) { |
| 358 | d = in[16+i+j*4]; |
| 359 | |
| 360 | t = sign_extend(d, 4); |
| 361 | s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6); |
| 362 | s_2 = s_1; |
| 363 | s_1 = av_clip_int16(s); |
| 364 | out0[j] = s_1; |
| 365 | } |
| 366 | |
| 367 | if (channels == 2) { |
| 368 | left->sample1 = s_1; |
| 369 | left->sample2 = s_2; |
| 370 | s_1 = right->sample1; |
| 371 | s_2 = right->sample2; |
| 372 | } |
| 373 | |
| 374 | shift = 12 - (in[5+i*2] & 15); |
| 375 | filter = in[5+i*2] >> 4; |
| 376 | if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) { |
| 377 | avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter); |
| 378 | filter=0; |
| 379 | } |
| 380 | |
| 381 | f0 = xa_adpcm_table[filter][0]; |
| 382 | f1 = xa_adpcm_table[filter][1]; |
| 383 | |
| 384 | for(j=0;j<28;j++) { |
| 385 | d = in[16+i+j*4]; |
| 386 | |
| 387 | t = sign_extend(d >> 4, 4); |
| 388 | s = ( t<<shift ) + ((s_1*f0 + s_2*f1+32)>>6); |
| 389 | s_2 = s_1; |
| 390 | s_1 = av_clip_int16(s); |
| 391 | out1[j] = s_1; |
| 392 | } |
| 393 | |
| 394 | if (channels == 2) { |
| 395 | right->sample1 = s_1; |
| 396 | right->sample2 = s_2; |
| 397 | } else { |
| 398 | left->sample1 = s_1; |
| 399 | left->sample2 = s_2; |
| 400 | } |
| 401 | |
| 402 | out0 += 28 * (3 - channels); |
| 403 | out1 += 28 * (3 - channels); |
| 404 | } |
| 405 | |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples) |
| 410 | { |
| 411 | ADPCMDecodeContext *c = avctx->priv_data; |
| 412 | GetBitContext gb; |
| 413 | const int *table; |
| 414 | int k0, signmask, nb_bits, count; |
| 415 | int size = buf_size*8; |
| 416 | int i; |
| 417 | |
| 418 | init_get_bits(&gb, buf, size); |
| 419 | |
| 420 | //read bits & initial values |
| 421 | nb_bits = get_bits(&gb, 2)+2; |
| 422 | table = swf_index_tables[nb_bits-2]; |
| 423 | k0 = 1 << (nb_bits-2); |
| 424 | signmask = 1 << (nb_bits-1); |
| 425 | |
| 426 | while (get_bits_count(&gb) <= size - 22*avctx->channels) { |
| 427 | for (i = 0; i < avctx->channels; i++) { |
| 428 | *samples++ = c->status[i].predictor = get_sbits(&gb, 16); |
| 429 | c->status[i].step_index = get_bits(&gb, 6); |
| 430 | } |
| 431 | |
| 432 | for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) { |
| 433 | int i; |
| 434 | |
| 435 | for (i = 0; i < avctx->channels; i++) { |
| 436 | // similar to IMA adpcm |
| 437 | int delta = get_bits(&gb, nb_bits); |
| 438 | int step = ff_adpcm_step_table[c->status[i].step_index]; |
| 439 | long vpdiff = 0; // vpdiff = (delta+0.5)*step/4 |
| 440 | int k = k0; |
| 441 | |
| 442 | do { |
| 443 | if (delta & k) |
| 444 | vpdiff += step; |
| 445 | step >>= 1; |
| 446 | k >>= 1; |
| 447 | } while(k); |
| 448 | vpdiff += step; |
| 449 | |
| 450 | if (delta & signmask) |
| 451 | c->status[i].predictor -= vpdiff; |
| 452 | else |
| 453 | c->status[i].predictor += vpdiff; |
| 454 | |
| 455 | c->status[i].step_index += table[delta & (~signmask)]; |
| 456 | |
| 457 | c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88); |
| 458 | c->status[i].predictor = av_clip_int16(c->status[i].predictor); |
| 459 | |
| 460 | *samples++ = c->status[i].predictor; |
| 461 | } |
| 462 | } |
| 463 | } |
| 464 | } |
| 465 | |
| 466 | /** |
| 467 | * Get the number of samples that will be decoded from the packet. |
| 468 | * In one case, this is actually the maximum number of samples possible to |
| 469 | * decode with the given buf_size. |
| 470 | * |
| 471 | * @param[out] coded_samples set to the number of samples as coded in the |
| 472 | * packet, or 0 if the codec does not encode the |
| 473 | * number of samples in each frame. |
| 474 | * @param[out] approx_nb_samples set to non-zero if the number of samples |
| 475 | * returned is an approximation. |
| 476 | */ |
| 477 | static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb, |
| 478 | int buf_size, int *coded_samples, int *approx_nb_samples) |
| 479 | { |
| 480 | ADPCMDecodeContext *s = avctx->priv_data; |
| 481 | int nb_samples = 0; |
| 482 | int ch = avctx->channels; |
| 483 | int has_coded_samples = 0; |
| 484 | int header_size; |
| 485 | |
| 486 | *coded_samples = 0; |
| 487 | *approx_nb_samples = 0; |
| 488 | |
| 489 | if(ch <= 0) |
| 490 | return 0; |
| 491 | |
| 492 | switch (avctx->codec->id) { |
| 493 | /* constant, only check buf_size */ |
| 494 | case AV_CODEC_ID_ADPCM_EA_XAS: |
| 495 | if (buf_size < 76 * ch) |
| 496 | return 0; |
| 497 | nb_samples = 128; |
| 498 | break; |
| 499 | case AV_CODEC_ID_ADPCM_IMA_QT: |
| 500 | if (buf_size < 34 * ch) |
| 501 | return 0; |
| 502 | nb_samples = 64; |
| 503 | break; |
| 504 | /* simple 4-bit adpcm */ |
| 505 | case AV_CODEC_ID_ADPCM_CT: |
| 506 | case AV_CODEC_ID_ADPCM_IMA_APC: |
| 507 | case AV_CODEC_ID_ADPCM_IMA_EA_SEAD: |
| 508 | case AV_CODEC_ID_ADPCM_IMA_OKI: |
| 509 | case AV_CODEC_ID_ADPCM_IMA_WS: |
| 510 | case AV_CODEC_ID_ADPCM_YAMAHA: |
| 511 | nb_samples = buf_size * 2 / ch; |
| 512 | break; |
| 513 | } |
| 514 | if (nb_samples) |
| 515 | return nb_samples; |
| 516 | |
| 517 | /* simple 4-bit adpcm, with header */ |
| 518 | header_size = 0; |
| 519 | switch (avctx->codec->id) { |
| 520 | case AV_CODEC_ID_ADPCM_4XM: |
| 521 | case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break; |
| 522 | case AV_CODEC_ID_ADPCM_IMA_AMV: header_size = 8; break; |
| 523 | case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break; |
| 524 | } |
| 525 | if (header_size > 0) |
| 526 | return (buf_size - header_size) * 2 / ch; |
| 527 | |
| 528 | /* more complex formats */ |
| 529 | switch (avctx->codec->id) { |
| 530 | case AV_CODEC_ID_ADPCM_EA: |
| 531 | has_coded_samples = 1; |
| 532 | *coded_samples = bytestream2_get_le32(gb); |
| 533 | *coded_samples -= *coded_samples % 28; |
| 534 | nb_samples = (buf_size - 12) / 30 * 28; |
| 535 | break; |
| 536 | case AV_CODEC_ID_ADPCM_IMA_EA_EACS: |
| 537 | has_coded_samples = 1; |
| 538 | *coded_samples = bytestream2_get_le32(gb); |
| 539 | nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch; |
| 540 | break; |
| 541 | case AV_CODEC_ID_ADPCM_EA_MAXIS_XA: |
| 542 | nb_samples = (buf_size - ch) / ch * 2; |
| 543 | break; |
| 544 | case AV_CODEC_ID_ADPCM_EA_R1: |
| 545 | case AV_CODEC_ID_ADPCM_EA_R2: |
| 546 | case AV_CODEC_ID_ADPCM_EA_R3: |
| 547 | /* maximum number of samples */ |
| 548 | /* has internal offsets and a per-frame switch to signal raw 16-bit */ |
| 549 | has_coded_samples = 1; |
| 550 | switch (avctx->codec->id) { |
| 551 | case AV_CODEC_ID_ADPCM_EA_R1: |
| 552 | header_size = 4 + 9 * ch; |
| 553 | *coded_samples = bytestream2_get_le32(gb); |
| 554 | break; |
| 555 | case AV_CODEC_ID_ADPCM_EA_R2: |
| 556 | header_size = 4 + 5 * ch; |
| 557 | *coded_samples = bytestream2_get_le32(gb); |
| 558 | break; |
| 559 | case AV_CODEC_ID_ADPCM_EA_R3: |
| 560 | header_size = 4 + 5 * ch; |
| 561 | *coded_samples = bytestream2_get_be32(gb); |
| 562 | break; |
| 563 | } |
| 564 | *coded_samples -= *coded_samples % 28; |
| 565 | nb_samples = (buf_size - header_size) * 2 / ch; |
| 566 | nb_samples -= nb_samples % 28; |
| 567 | *approx_nb_samples = 1; |
| 568 | break; |
| 569 | case AV_CODEC_ID_ADPCM_IMA_DK3: |
| 570 | if (avctx->block_align > 0) |
| 571 | buf_size = FFMIN(buf_size, avctx->block_align); |
| 572 | nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch; |
| 573 | break; |
| 574 | case AV_CODEC_ID_ADPCM_IMA_DK4: |
| 575 | if (avctx->block_align > 0) |
| 576 | buf_size = FFMIN(buf_size, avctx->block_align); |
| 577 | nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch; |
| 578 | break; |
| 579 | case AV_CODEC_ID_ADPCM_IMA_RAD: |
| 580 | if (avctx->block_align > 0) |
| 581 | buf_size = FFMIN(buf_size, avctx->block_align); |
| 582 | nb_samples = (buf_size - 4 * ch) * 2 / ch; |
| 583 | break; |
| 584 | case AV_CODEC_ID_ADPCM_IMA_WAV: |
| 585 | { |
| 586 | int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2]; |
| 587 | int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2]; |
| 588 | if (avctx->block_align > 0) |
| 589 | buf_size = FFMIN(buf_size, avctx->block_align); |
| 590 | nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples; |
| 591 | break; |
| 592 | } |
| 593 | case AV_CODEC_ID_ADPCM_MS: |
| 594 | if (avctx->block_align > 0) |
| 595 | buf_size = FFMIN(buf_size, avctx->block_align); |
| 596 | nb_samples = 2 + (buf_size - 7 * ch) * 2 / ch; |
| 597 | break; |
| 598 | case AV_CODEC_ID_ADPCM_SBPRO_2: |
| 599 | case AV_CODEC_ID_ADPCM_SBPRO_3: |
| 600 | case AV_CODEC_ID_ADPCM_SBPRO_4: |
| 601 | { |
| 602 | int samples_per_byte; |
| 603 | switch (avctx->codec->id) { |
| 604 | case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break; |
| 605 | case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break; |
| 606 | case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break; |
| 607 | } |
| 608 | if (!s->status[0].step_index) { |
| 609 | nb_samples++; |
| 610 | buf_size -= ch; |
| 611 | } |
| 612 | nb_samples += buf_size * samples_per_byte / ch; |
| 613 | break; |
| 614 | } |
| 615 | case AV_CODEC_ID_ADPCM_SWF: |
| 616 | { |
| 617 | int buf_bits = buf_size * 8 - 2; |
| 618 | int nbits = (bytestream2_get_byte(gb) >> 6) + 2; |
| 619 | int block_hdr_size = 22 * ch; |
| 620 | int block_size = block_hdr_size + nbits * ch * 4095; |
| 621 | int nblocks = buf_bits / block_size; |
| 622 | int bits_left = buf_bits - nblocks * block_size; |
| 623 | nb_samples = nblocks * 4096; |
| 624 | if (bits_left >= block_hdr_size) |
| 625 | nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch); |
| 626 | break; |
| 627 | } |
| 628 | case AV_CODEC_ID_ADPCM_THP: |
| 629 | if (avctx->extradata) { |
| 630 | nb_samples = buf_size / (8 * ch) * 14; |
| 631 | break; |
| 632 | } |
| 633 | has_coded_samples = 1; |
| 634 | bytestream2_skip(gb, 4); // channel size |
| 635 | *coded_samples = bytestream2_get_be32(gb); |
| 636 | *coded_samples -= *coded_samples % 14; |
| 637 | nb_samples = (buf_size - (8 + 36 * ch)) / (8 * ch) * 14; |
| 638 | break; |
| 639 | case AV_CODEC_ID_ADPCM_AFC: |
| 640 | nb_samples = buf_size / (9 * ch) * 16; |
| 641 | break; |
| 642 | case AV_CODEC_ID_ADPCM_XA: |
| 643 | nb_samples = (buf_size / 128) * 224 / ch; |
| 644 | break; |
| 645 | case AV_CODEC_ID_ADPCM_DTK: |
| 646 | nb_samples = buf_size / (16 * ch) * 28; |
| 647 | break; |
| 648 | } |
| 649 | |
| 650 | /* validate coded sample count */ |
| 651 | if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples)) |
| 652 | return AVERROR_INVALIDDATA; |
| 653 | |
| 654 | return nb_samples; |
| 655 | } |
| 656 | |
| 657 | static int adpcm_decode_frame(AVCodecContext *avctx, void *data, |
| 658 | int *got_frame_ptr, AVPacket *avpkt) |
| 659 | { |
| 660 | AVFrame *frame = data; |
| 661 | const uint8_t *buf = avpkt->data; |
| 662 | int buf_size = avpkt->size; |
| 663 | ADPCMDecodeContext *c = avctx->priv_data; |
| 664 | ADPCMChannelStatus *cs; |
| 665 | int n, m, channel, i; |
| 666 | short *samples; |
| 667 | int16_t **samples_p; |
| 668 | int st; /* stereo */ |
| 669 | int count1, count2; |
| 670 | int nb_samples, coded_samples, approx_nb_samples, ret; |
| 671 | GetByteContext gb; |
| 672 | |
| 673 | bytestream2_init(&gb, buf, buf_size); |
| 674 | nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples); |
| 675 | if (nb_samples <= 0) { |
| 676 | av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n"); |
| 677 | return AVERROR_INVALIDDATA; |
| 678 | } |
| 679 | |
| 680 | /* get output buffer */ |
| 681 | frame->nb_samples = nb_samples; |
| 682 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 683 | return ret; |
| 684 | samples = (short *)frame->data[0]; |
| 685 | samples_p = (int16_t **)frame->extended_data; |
| 686 | |
| 687 | /* use coded_samples when applicable */ |
| 688 | /* it is always <= nb_samples, so the output buffer will be large enough */ |
| 689 | if (coded_samples) { |
| 690 | if (!approx_nb_samples && coded_samples != nb_samples) |
| 691 | av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n"); |
| 692 | frame->nb_samples = nb_samples = coded_samples; |
| 693 | } |
| 694 | |
| 695 | st = avctx->channels == 2 ? 1 : 0; |
| 696 | |
| 697 | switch(avctx->codec->id) { |
| 698 | case AV_CODEC_ID_ADPCM_IMA_QT: |
| 699 | /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples). |
| 700 | Channel data is interleaved per-chunk. */ |
| 701 | for (channel = 0; channel < avctx->channels; channel++) { |
| 702 | int predictor; |
| 703 | int step_index; |
| 704 | cs = &(c->status[channel]); |
| 705 | /* (pppppp) (piiiiiii) */ |
| 706 | |
| 707 | /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */ |
| 708 | predictor = sign_extend(bytestream2_get_be16u(&gb), 16); |
| 709 | step_index = predictor & 0x7F; |
| 710 | predictor &= ~0x7F; |
| 711 | |
| 712 | if (cs->step_index == step_index) { |
| 713 | int diff = predictor - cs->predictor; |
| 714 | if (diff < 0) |
| 715 | diff = - diff; |
| 716 | if (diff > 0x7f) |
| 717 | goto update; |
| 718 | } else { |
| 719 | update: |
| 720 | cs->step_index = step_index; |
| 721 | cs->predictor = predictor; |
| 722 | } |
| 723 | |
| 724 | if (cs->step_index > 88u){ |
| 725 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| 726 | channel, cs->step_index); |
| 727 | return AVERROR_INVALIDDATA; |
| 728 | } |
| 729 | |
| 730 | samples = samples_p[channel]; |
| 731 | |
| 732 | for (m = 0; m < 64; m += 2) { |
| 733 | int byte = bytestream2_get_byteu(&gb); |
| 734 | samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F, 3); |
| 735 | samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 , 3); |
| 736 | } |
| 737 | } |
| 738 | break; |
| 739 | case AV_CODEC_ID_ADPCM_IMA_WAV: |
| 740 | for(i=0; i<avctx->channels; i++){ |
| 741 | cs = &(c->status[i]); |
| 742 | cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 743 | |
| 744 | cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 745 | if (cs->step_index > 88u){ |
| 746 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| 747 | i, cs->step_index); |
| 748 | return AVERROR_INVALIDDATA; |
| 749 | } |
| 750 | } |
| 751 | |
| 752 | if (avctx->bits_per_coded_sample != 4) { |
| 753 | int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2]; |
| 754 | GetBitContext g; |
| 755 | |
| 756 | init_get_bits8(&g, gb.buffer, bytestream2_get_bytes_left(&gb)); |
| 757 | for (n = 0; n < (nb_samples - 1) / samples_per_block; n++) { |
| 758 | for (i = 0; i < avctx->channels; i++) { |
| 759 | cs = &c->status[i]; |
| 760 | samples = &samples_p[i][1 + n * samples_per_block]; |
| 761 | for (m = 0; m < samples_per_block; m++) { |
| 762 | samples[m] = adpcm_ima_wav_expand_nibble(cs, &g, |
| 763 | avctx->bits_per_coded_sample); |
| 764 | } |
| 765 | } |
| 766 | } |
| 767 | bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4); |
| 768 | } else { |
| 769 | for (n = 0; n < (nb_samples - 1) / 8; n++) { |
| 770 | for (i = 0; i < avctx->channels; i++) { |
| 771 | cs = &c->status[i]; |
| 772 | samples = &samples_p[i][1 + n * 8]; |
| 773 | for (m = 0; m < 8; m += 2) { |
| 774 | int v = bytestream2_get_byteu(&gb); |
| 775 | samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3); |
| 776 | samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3); |
| 777 | } |
| 778 | } |
| 779 | } |
| 780 | } |
| 781 | break; |
| 782 | case AV_CODEC_ID_ADPCM_4XM: |
| 783 | for (i = 0; i < avctx->channels; i++) |
| 784 | c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 785 | |
| 786 | for (i = 0; i < avctx->channels; i++) { |
| 787 | c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 788 | if (c->status[i].step_index > 88u) { |
| 789 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| 790 | i, c->status[i].step_index); |
| 791 | return AVERROR_INVALIDDATA; |
| 792 | } |
| 793 | } |
| 794 | |
| 795 | for (i = 0; i < avctx->channels; i++) { |
| 796 | samples = (int16_t *)frame->data[i]; |
| 797 | cs = &c->status[i]; |
| 798 | for (n = nb_samples >> 1; n > 0; n--) { |
| 799 | int v = bytestream2_get_byteu(&gb); |
| 800 | *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4); |
| 801 | *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4); |
| 802 | } |
| 803 | } |
| 804 | break; |
| 805 | case AV_CODEC_ID_ADPCM_MS: |
| 806 | { |
| 807 | int block_predictor; |
| 808 | |
| 809 | block_predictor = bytestream2_get_byteu(&gb); |
| 810 | if (block_predictor > 6) { |
| 811 | av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n", |
| 812 | block_predictor); |
| 813 | return AVERROR_INVALIDDATA; |
| 814 | } |
| 815 | c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor]; |
| 816 | c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor]; |
| 817 | if (st) { |
| 818 | block_predictor = bytestream2_get_byteu(&gb); |
| 819 | if (block_predictor > 6) { |
| 820 | av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n", |
| 821 | block_predictor); |
| 822 | return AVERROR_INVALIDDATA; |
| 823 | } |
| 824 | c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor]; |
| 825 | c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor]; |
| 826 | } |
| 827 | c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 828 | if (st){ |
| 829 | c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 830 | } |
| 831 | |
| 832 | c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 833 | if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 834 | c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 835 | if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 836 | |
| 837 | *samples++ = c->status[0].sample2; |
| 838 | if (st) *samples++ = c->status[1].sample2; |
| 839 | *samples++ = c->status[0].sample1; |
| 840 | if (st) *samples++ = c->status[1].sample1; |
| 841 | for(n = (nb_samples - 2) >> (1 - st); n > 0; n--) { |
| 842 | int byte = bytestream2_get_byteu(&gb); |
| 843 | *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 ); |
| 844 | *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F); |
| 845 | } |
| 846 | break; |
| 847 | } |
| 848 | case AV_CODEC_ID_ADPCM_IMA_DK4: |
| 849 | for (channel = 0; channel < avctx->channels; channel++) { |
| 850 | cs = &c->status[channel]; |
| 851 | cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 852 | cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 853 | if (cs->step_index > 88u){ |
| 854 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| 855 | channel, cs->step_index); |
| 856 | return AVERROR_INVALIDDATA; |
| 857 | } |
| 858 | } |
| 859 | for (n = (nb_samples - 1) >> (1 - st); n > 0; n--) { |
| 860 | int v = bytestream2_get_byteu(&gb); |
| 861 | *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3); |
| 862 | *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3); |
| 863 | } |
| 864 | break; |
| 865 | case AV_CODEC_ID_ADPCM_IMA_DK3: |
| 866 | { |
| 867 | int last_byte = 0; |
| 868 | int nibble; |
| 869 | int decode_top_nibble_next = 0; |
| 870 | int diff_channel; |
| 871 | const int16_t *samples_end = samples + avctx->channels * nb_samples; |
| 872 | |
| 873 | bytestream2_skipu(&gb, 10); |
| 874 | c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 875 | c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 876 | c->status[0].step_index = bytestream2_get_byteu(&gb); |
| 877 | c->status[1].step_index = bytestream2_get_byteu(&gb); |
| 878 | if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){ |
| 879 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n", |
| 880 | c->status[0].step_index, c->status[1].step_index); |
| 881 | return AVERROR_INVALIDDATA; |
| 882 | } |
| 883 | /* sign extend the predictors */ |
| 884 | diff_channel = c->status[1].predictor; |
| 885 | |
| 886 | /* DK3 ADPCM support macro */ |
| 887 | #define DK3_GET_NEXT_NIBBLE() \ |
| 888 | if (decode_top_nibble_next) { \ |
| 889 | nibble = last_byte >> 4; \ |
| 890 | decode_top_nibble_next = 0; \ |
| 891 | } else { \ |
| 892 | last_byte = bytestream2_get_byteu(&gb); \ |
| 893 | nibble = last_byte & 0x0F; \ |
| 894 | decode_top_nibble_next = 1; \ |
| 895 | } |
| 896 | |
| 897 | while (samples < samples_end) { |
| 898 | |
| 899 | /* for this algorithm, c->status[0] is the sum channel and |
| 900 | * c->status[1] is the diff channel */ |
| 901 | |
| 902 | /* process the first predictor of the sum channel */ |
| 903 | DK3_GET_NEXT_NIBBLE(); |
| 904 | adpcm_ima_expand_nibble(&c->status[0], nibble, 3); |
| 905 | |
| 906 | /* process the diff channel predictor */ |
| 907 | DK3_GET_NEXT_NIBBLE(); |
| 908 | adpcm_ima_expand_nibble(&c->status[1], nibble, 3); |
| 909 | |
| 910 | /* process the first pair of stereo PCM samples */ |
| 911 | diff_channel = (diff_channel + c->status[1].predictor) / 2; |
| 912 | *samples++ = c->status[0].predictor + c->status[1].predictor; |
| 913 | *samples++ = c->status[0].predictor - c->status[1].predictor; |
| 914 | |
| 915 | /* process the second predictor of the sum channel */ |
| 916 | DK3_GET_NEXT_NIBBLE(); |
| 917 | adpcm_ima_expand_nibble(&c->status[0], nibble, 3); |
| 918 | |
| 919 | /* process the second pair of stereo PCM samples */ |
| 920 | diff_channel = (diff_channel + c->status[1].predictor) / 2; |
| 921 | *samples++ = c->status[0].predictor + c->status[1].predictor; |
| 922 | *samples++ = c->status[0].predictor - c->status[1].predictor; |
| 923 | } |
| 924 | |
| 925 | if ((bytestream2_tell(&gb) & 1)) |
| 926 | bytestream2_skip(&gb, 1); |
| 927 | break; |
| 928 | } |
| 929 | case AV_CODEC_ID_ADPCM_IMA_ISS: |
| 930 | for (channel = 0; channel < avctx->channels; channel++) { |
| 931 | cs = &c->status[channel]; |
| 932 | cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 933 | cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 934 | if (cs->step_index > 88u){ |
| 935 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| 936 | channel, cs->step_index); |
| 937 | return AVERROR_INVALIDDATA; |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 942 | int v1, v2; |
| 943 | int v = bytestream2_get_byteu(&gb); |
| 944 | /* nibbles are swapped for mono */ |
| 945 | if (st) { |
| 946 | v1 = v >> 4; |
| 947 | v2 = v & 0x0F; |
| 948 | } else { |
| 949 | v2 = v >> 4; |
| 950 | v1 = v & 0x0F; |
| 951 | } |
| 952 | *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3); |
| 953 | *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3); |
| 954 | } |
| 955 | break; |
| 956 | case AV_CODEC_ID_ADPCM_IMA_APC: |
| 957 | while (bytestream2_get_bytes_left(&gb) > 0) { |
| 958 | int v = bytestream2_get_byteu(&gb); |
| 959 | *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3); |
| 960 | *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3); |
| 961 | } |
| 962 | break; |
| 963 | case AV_CODEC_ID_ADPCM_IMA_OKI: |
| 964 | while (bytestream2_get_bytes_left(&gb) > 0) { |
| 965 | int v = bytestream2_get_byteu(&gb); |
| 966 | *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 ); |
| 967 | *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F); |
| 968 | } |
| 969 | break; |
| 970 | case AV_CODEC_ID_ADPCM_IMA_RAD: |
| 971 | for (channel = 0; channel < avctx->channels; channel++) { |
| 972 | cs = &c->status[channel]; |
| 973 | cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 974 | cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 975 | if (cs->step_index > 88u){ |
| 976 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| 977 | channel, cs->step_index); |
| 978 | return AVERROR_INVALIDDATA; |
| 979 | } |
| 980 | } |
| 981 | for (n = 0; n < nb_samples / 2; n++) { |
| 982 | int byte[2]; |
| 983 | |
| 984 | byte[0] = bytestream2_get_byteu(&gb); |
| 985 | if (st) |
| 986 | byte[1] = bytestream2_get_byteu(&gb); |
| 987 | for(channel = 0; channel < avctx->channels; channel++) { |
| 988 | *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3); |
| 989 | } |
| 990 | for(channel = 0; channel < avctx->channels; channel++) { |
| 991 | *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3); |
| 992 | } |
| 993 | } |
| 994 | break; |
| 995 | case AV_CODEC_ID_ADPCM_IMA_WS: |
| 996 | if (c->vqa_version == 3) { |
| 997 | for (channel = 0; channel < avctx->channels; channel++) { |
| 998 | int16_t *smp = samples_p[channel]; |
| 999 | |
| 1000 | for (n = nb_samples / 2; n > 0; n--) { |
| 1001 | int v = bytestream2_get_byteu(&gb); |
| 1002 | *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3); |
| 1003 | *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3); |
| 1004 | } |
| 1005 | } |
| 1006 | } else { |
| 1007 | for (n = nb_samples / 2; n > 0; n--) { |
| 1008 | for (channel = 0; channel < avctx->channels; channel++) { |
| 1009 | int v = bytestream2_get_byteu(&gb); |
| 1010 | *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3); |
| 1011 | samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3); |
| 1012 | } |
| 1013 | samples += avctx->channels; |
| 1014 | } |
| 1015 | } |
| 1016 | bytestream2_seek(&gb, 0, SEEK_END); |
| 1017 | break; |
| 1018 | case AV_CODEC_ID_ADPCM_XA: |
| 1019 | { |
| 1020 | int16_t *out0 = samples_p[0]; |
| 1021 | int16_t *out1 = samples_p[1]; |
| 1022 | int samples_per_block = 28 * (3 - avctx->channels) * 4; |
| 1023 | int sample_offset = 0; |
| 1024 | while (bytestream2_get_bytes_left(&gb) >= 128) { |
| 1025 | if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb), |
| 1026 | &c->status[0], &c->status[1], |
| 1027 | avctx->channels, sample_offset)) < 0) |
| 1028 | return ret; |
| 1029 | bytestream2_skipu(&gb, 128); |
| 1030 | sample_offset += samples_per_block; |
| 1031 | } |
| 1032 | break; |
| 1033 | } |
| 1034 | case AV_CODEC_ID_ADPCM_IMA_EA_EACS: |
| 1035 | for (i=0; i<=st; i++) { |
| 1036 | c->status[i].step_index = bytestream2_get_le32u(&gb); |
| 1037 | if (c->status[i].step_index > 88u) { |
| 1038 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n", |
| 1039 | i, c->status[i].step_index); |
| 1040 | return AVERROR_INVALIDDATA; |
| 1041 | } |
| 1042 | } |
| 1043 | for (i=0; i<=st; i++) |
| 1044 | c->status[i].predictor = bytestream2_get_le32u(&gb); |
| 1045 | |
| 1046 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 1047 | int byte = bytestream2_get_byteu(&gb); |
| 1048 | *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3); |
| 1049 | *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3); |
| 1050 | } |
| 1051 | break; |
| 1052 | case AV_CODEC_ID_ADPCM_IMA_EA_SEAD: |
| 1053 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 1054 | int byte = bytestream2_get_byteu(&gb); |
| 1055 | *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6); |
| 1056 | *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6); |
| 1057 | } |
| 1058 | break; |
| 1059 | case AV_CODEC_ID_ADPCM_EA: |
| 1060 | { |
| 1061 | int previous_left_sample, previous_right_sample; |
| 1062 | int current_left_sample, current_right_sample; |
| 1063 | int next_left_sample, next_right_sample; |
| 1064 | int coeff1l, coeff2l, coeff1r, coeff2r; |
| 1065 | int shift_left, shift_right; |
| 1066 | |
| 1067 | /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces, |
| 1068 | each coding 28 stereo samples. */ |
| 1069 | |
| 1070 | if(avctx->channels != 2) |
| 1071 | return AVERROR_INVALIDDATA; |
| 1072 | |
| 1073 | current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 1074 | previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 1075 | current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 1076 | previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 1077 | |
| 1078 | for (count1 = 0; count1 < nb_samples / 28; count1++) { |
| 1079 | int byte = bytestream2_get_byteu(&gb); |
| 1080 | coeff1l = ea_adpcm_table[ byte >> 4 ]; |
| 1081 | coeff2l = ea_adpcm_table[(byte >> 4 ) + 4]; |
| 1082 | coeff1r = ea_adpcm_table[ byte & 0x0F]; |
| 1083 | coeff2r = ea_adpcm_table[(byte & 0x0F) + 4]; |
| 1084 | |
| 1085 | byte = bytestream2_get_byteu(&gb); |
| 1086 | shift_left = 20 - (byte >> 4); |
| 1087 | shift_right = 20 - (byte & 0x0F); |
| 1088 | |
| 1089 | for (count2 = 0; count2 < 28; count2++) { |
| 1090 | byte = bytestream2_get_byteu(&gb); |
| 1091 | next_left_sample = sign_extend(byte >> 4, 4) << shift_left; |
| 1092 | next_right_sample = sign_extend(byte, 4) << shift_right; |
| 1093 | |
| 1094 | next_left_sample = (next_left_sample + |
| 1095 | (current_left_sample * coeff1l) + |
| 1096 | (previous_left_sample * coeff2l) + 0x80) >> 8; |
| 1097 | next_right_sample = (next_right_sample + |
| 1098 | (current_right_sample * coeff1r) + |
| 1099 | (previous_right_sample * coeff2r) + 0x80) >> 8; |
| 1100 | |
| 1101 | previous_left_sample = current_left_sample; |
| 1102 | current_left_sample = av_clip_int16(next_left_sample); |
| 1103 | previous_right_sample = current_right_sample; |
| 1104 | current_right_sample = av_clip_int16(next_right_sample); |
| 1105 | *samples++ = current_left_sample; |
| 1106 | *samples++ = current_right_sample; |
| 1107 | } |
| 1108 | } |
| 1109 | |
| 1110 | bytestream2_skip(&gb, 2); // Skip terminating 0x0000 |
| 1111 | |
| 1112 | break; |
| 1113 | } |
| 1114 | case AV_CODEC_ID_ADPCM_EA_MAXIS_XA: |
| 1115 | { |
| 1116 | int coeff[2][2], shift[2]; |
| 1117 | |
| 1118 | for(channel = 0; channel < avctx->channels; channel++) { |
| 1119 | int byte = bytestream2_get_byteu(&gb); |
| 1120 | for (i=0; i<2; i++) |
| 1121 | coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i]; |
| 1122 | shift[channel] = 20 - (byte & 0x0F); |
| 1123 | } |
| 1124 | for (count1 = 0; count1 < nb_samples / 2; count1++) { |
| 1125 | int byte[2]; |
| 1126 | |
| 1127 | byte[0] = bytestream2_get_byteu(&gb); |
| 1128 | if (st) byte[1] = bytestream2_get_byteu(&gb); |
| 1129 | for(i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */ |
| 1130 | for(channel = 0; channel < avctx->channels; channel++) { |
| 1131 | int sample = sign_extend(byte[channel] >> i, 4) << shift[channel]; |
| 1132 | sample = (sample + |
| 1133 | c->status[channel].sample1 * coeff[channel][0] + |
| 1134 | c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8; |
| 1135 | c->status[channel].sample2 = c->status[channel].sample1; |
| 1136 | c->status[channel].sample1 = av_clip_int16(sample); |
| 1137 | *samples++ = c->status[channel].sample1; |
| 1138 | } |
| 1139 | } |
| 1140 | } |
| 1141 | bytestream2_seek(&gb, 0, SEEK_END); |
| 1142 | break; |
| 1143 | } |
| 1144 | case AV_CODEC_ID_ADPCM_EA_R1: |
| 1145 | case AV_CODEC_ID_ADPCM_EA_R2: |
| 1146 | case AV_CODEC_ID_ADPCM_EA_R3: { |
| 1147 | /* channel numbering |
| 1148 | 2chan: 0=fl, 1=fr |
| 1149 | 4chan: 0=fl, 1=rl, 2=fr, 3=rr |
| 1150 | 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */ |
| 1151 | const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3; |
| 1152 | int previous_sample, current_sample, next_sample; |
| 1153 | int coeff1, coeff2; |
| 1154 | int shift; |
| 1155 | unsigned int channel; |
| 1156 | uint16_t *samplesC; |
| 1157 | int count = 0; |
| 1158 | int offsets[6]; |
| 1159 | |
| 1160 | for (channel=0; channel<avctx->channels; channel++) |
| 1161 | offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) : |
| 1162 | bytestream2_get_le32(&gb)) + |
| 1163 | (avctx->channels + 1) * 4; |
| 1164 | |
| 1165 | for (channel=0; channel<avctx->channels; channel++) { |
| 1166 | bytestream2_seek(&gb, offsets[channel], SEEK_SET); |
| 1167 | samplesC = samples_p[channel]; |
| 1168 | |
| 1169 | if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) { |
| 1170 | current_sample = sign_extend(bytestream2_get_le16(&gb), 16); |
| 1171 | previous_sample = sign_extend(bytestream2_get_le16(&gb), 16); |
| 1172 | } else { |
| 1173 | current_sample = c->status[channel].predictor; |
| 1174 | previous_sample = c->status[channel].prev_sample; |
| 1175 | } |
| 1176 | |
| 1177 | for (count1 = 0; count1 < nb_samples / 28; count1++) { |
| 1178 | int byte = bytestream2_get_byte(&gb); |
| 1179 | if (byte == 0xEE) { /* only seen in R2 and R3 */ |
| 1180 | current_sample = sign_extend(bytestream2_get_be16(&gb), 16); |
| 1181 | previous_sample = sign_extend(bytestream2_get_be16(&gb), 16); |
| 1182 | |
| 1183 | for (count2=0; count2<28; count2++) |
| 1184 | *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16); |
| 1185 | } else { |
| 1186 | coeff1 = ea_adpcm_table[ byte >> 4 ]; |
| 1187 | coeff2 = ea_adpcm_table[(byte >> 4) + 4]; |
| 1188 | shift = 20 - (byte & 0x0F); |
| 1189 | |
| 1190 | for (count2=0; count2<28; count2++) { |
| 1191 | if (count2 & 1) |
| 1192 | next_sample = sign_extend(byte, 4) << shift; |
| 1193 | else { |
| 1194 | byte = bytestream2_get_byte(&gb); |
| 1195 | next_sample = sign_extend(byte >> 4, 4) << shift; |
| 1196 | } |
| 1197 | |
| 1198 | next_sample += (current_sample * coeff1) + |
| 1199 | (previous_sample * coeff2); |
| 1200 | next_sample = av_clip_int16(next_sample >> 8); |
| 1201 | |
| 1202 | previous_sample = current_sample; |
| 1203 | current_sample = next_sample; |
| 1204 | *samplesC++ = current_sample; |
| 1205 | } |
| 1206 | } |
| 1207 | } |
| 1208 | if (!count) { |
| 1209 | count = count1; |
| 1210 | } else if (count != count1) { |
| 1211 | av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n"); |
| 1212 | count = FFMAX(count, count1); |
| 1213 | } |
| 1214 | |
| 1215 | if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) { |
| 1216 | c->status[channel].predictor = current_sample; |
| 1217 | c->status[channel].prev_sample = previous_sample; |
| 1218 | } |
| 1219 | } |
| 1220 | |
| 1221 | frame->nb_samples = count * 28; |
| 1222 | bytestream2_seek(&gb, 0, SEEK_END); |
| 1223 | break; |
| 1224 | } |
| 1225 | case AV_CODEC_ID_ADPCM_EA_XAS: |
| 1226 | for (channel=0; channel<avctx->channels; channel++) { |
| 1227 | int coeff[2][4], shift[4]; |
| 1228 | int16_t *s = samples_p[channel]; |
| 1229 | for (n = 0; n < 4; n++, s += 32) { |
| 1230 | int val = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 1231 | for (i=0; i<2; i++) |
| 1232 | coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i]; |
| 1233 | s[0] = val & ~0x0F; |
| 1234 | |
| 1235 | val = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 1236 | shift[n] = 20 - (val & 0x0F); |
| 1237 | s[1] = val & ~0x0F; |
| 1238 | } |
| 1239 | |
| 1240 | for (m=2; m<32; m+=2) { |
| 1241 | s = &samples_p[channel][m]; |
| 1242 | for (n = 0; n < 4; n++, s += 32) { |
| 1243 | int level, pred; |
| 1244 | int byte = bytestream2_get_byteu(&gb); |
| 1245 | |
| 1246 | level = sign_extend(byte >> 4, 4) << shift[n]; |
| 1247 | pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n]; |
| 1248 | s[0] = av_clip_int16((level + pred + 0x80) >> 8); |
| 1249 | |
| 1250 | level = sign_extend(byte, 4) << shift[n]; |
| 1251 | pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n]; |
| 1252 | s[1] = av_clip_int16((level + pred + 0x80) >> 8); |
| 1253 | } |
| 1254 | } |
| 1255 | } |
| 1256 | break; |
| 1257 | case AV_CODEC_ID_ADPCM_IMA_AMV: |
| 1258 | c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16); |
| 1259 | c->status[0].step_index = bytestream2_get_le16u(&gb); |
| 1260 | bytestream2_skipu(&gb, 4); |
| 1261 | if (c->status[0].step_index > 88u) { |
| 1262 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", |
| 1263 | c->status[0].step_index); |
| 1264 | return AVERROR_INVALIDDATA; |
| 1265 | } |
| 1266 | |
| 1267 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 1268 | int v = bytestream2_get_byteu(&gb); |
| 1269 | |
| 1270 | *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3); |
| 1271 | *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3); |
| 1272 | } |
| 1273 | break; |
| 1274 | case AV_CODEC_ID_ADPCM_IMA_SMJPEG: |
| 1275 | for (i = 0; i < avctx->channels; i++) { |
| 1276 | c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16); |
| 1277 | c->status[i].step_index = bytestream2_get_byteu(&gb); |
| 1278 | bytestream2_skipu(&gb, 1); |
| 1279 | if (c->status[i].step_index > 88u) { |
| 1280 | av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n", |
| 1281 | c->status[i].step_index); |
| 1282 | return AVERROR_INVALIDDATA; |
| 1283 | } |
| 1284 | } |
| 1285 | |
| 1286 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 1287 | int v = bytestream2_get_byteu(&gb); |
| 1288 | |
| 1289 | *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4, 3); |
| 1290 | *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf, 3); |
| 1291 | } |
| 1292 | break; |
| 1293 | case AV_CODEC_ID_ADPCM_CT: |
| 1294 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 1295 | int v = bytestream2_get_byteu(&gb); |
| 1296 | *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 ); |
| 1297 | *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F); |
| 1298 | } |
| 1299 | break; |
| 1300 | case AV_CODEC_ID_ADPCM_SBPRO_4: |
| 1301 | case AV_CODEC_ID_ADPCM_SBPRO_3: |
| 1302 | case AV_CODEC_ID_ADPCM_SBPRO_2: |
| 1303 | if (!c->status[0].step_index) { |
| 1304 | /* the first byte is a raw sample */ |
| 1305 | *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80); |
| 1306 | if (st) |
| 1307 | *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80); |
| 1308 | c->status[0].step_index = 1; |
| 1309 | nb_samples--; |
| 1310 | } |
| 1311 | if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) { |
| 1312 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 1313 | int byte = bytestream2_get_byteu(&gb); |
| 1314 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| 1315 | byte >> 4, 4, 0); |
| 1316 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[st], |
| 1317 | byte & 0x0F, 4, 0); |
| 1318 | } |
| 1319 | } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) { |
| 1320 | for (n = (nb_samples<<st) / 3; n > 0; n--) { |
| 1321 | int byte = bytestream2_get_byteu(&gb); |
| 1322 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| 1323 | byte >> 5 , 3, 0); |
| 1324 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| 1325 | (byte >> 2) & 0x07, 3, 0); |
| 1326 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| 1327 | byte & 0x03, 2, 0); |
| 1328 | } |
| 1329 | } else { |
| 1330 | for (n = nb_samples >> (2 - st); n > 0; n--) { |
| 1331 | int byte = bytestream2_get_byteu(&gb); |
| 1332 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| 1333 | byte >> 6 , 2, 2); |
| 1334 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[st], |
| 1335 | (byte >> 4) & 0x03, 2, 2); |
| 1336 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[0], |
| 1337 | (byte >> 2) & 0x03, 2, 2); |
| 1338 | *samples++ = adpcm_sbpro_expand_nibble(&c->status[st], |
| 1339 | byte & 0x03, 2, 2); |
| 1340 | } |
| 1341 | } |
| 1342 | break; |
| 1343 | case AV_CODEC_ID_ADPCM_SWF: |
| 1344 | adpcm_swf_decode(avctx, buf, buf_size, samples); |
| 1345 | bytestream2_seek(&gb, 0, SEEK_END); |
| 1346 | break; |
| 1347 | case AV_CODEC_ID_ADPCM_YAMAHA: |
| 1348 | for (n = nb_samples >> (1 - st); n > 0; n--) { |
| 1349 | int v = bytestream2_get_byteu(&gb); |
| 1350 | *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F); |
| 1351 | *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 ); |
| 1352 | } |
| 1353 | break; |
| 1354 | case AV_CODEC_ID_ADPCM_AFC: |
| 1355 | { |
| 1356 | int samples_per_block; |
| 1357 | int blocks; |
| 1358 | |
| 1359 | if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) { |
| 1360 | samples_per_block = avctx->extradata[0] / 16; |
| 1361 | blocks = nb_samples / avctx->extradata[0]; |
| 1362 | } else { |
| 1363 | samples_per_block = nb_samples / 16; |
| 1364 | blocks = 1; |
| 1365 | } |
| 1366 | |
| 1367 | for (m = 0; m < blocks; m++) { |
| 1368 | for (channel = 0; channel < avctx->channels; channel++) { |
| 1369 | int prev1 = c->status[channel].sample1; |
| 1370 | int prev2 = c->status[channel].sample2; |
| 1371 | |
| 1372 | samples = samples_p[channel] + m * 16; |
| 1373 | /* Read in every sample for this channel. */ |
| 1374 | for (i = 0; i < samples_per_block; i++) { |
| 1375 | int byte = bytestream2_get_byteu(&gb); |
| 1376 | int scale = 1 << (byte >> 4); |
| 1377 | int index = byte & 0xf; |
| 1378 | int factor1 = ff_adpcm_afc_coeffs[0][index]; |
| 1379 | int factor2 = ff_adpcm_afc_coeffs[1][index]; |
| 1380 | |
| 1381 | /* Decode 16 samples. */ |
| 1382 | for (n = 0; n < 16; n++) { |
| 1383 | int32_t sampledat; |
| 1384 | |
| 1385 | if (n & 1) { |
| 1386 | sampledat = sign_extend(byte, 4); |
| 1387 | } else { |
| 1388 | byte = bytestream2_get_byteu(&gb); |
| 1389 | sampledat = sign_extend(byte >> 4, 4); |
| 1390 | } |
| 1391 | |
| 1392 | sampledat = ((prev1 * factor1 + prev2 * factor2) + |
| 1393 | ((sampledat * scale) << 11)) >> 11; |
| 1394 | *samples = av_clip_int16(sampledat); |
| 1395 | prev2 = prev1; |
| 1396 | prev1 = *samples++; |
| 1397 | } |
| 1398 | } |
| 1399 | |
| 1400 | c->status[channel].sample1 = prev1; |
| 1401 | c->status[channel].sample2 = prev2; |
| 1402 | } |
| 1403 | } |
| 1404 | bytestream2_seek(&gb, 0, SEEK_END); |
| 1405 | break; |
| 1406 | } |
| 1407 | case AV_CODEC_ID_ADPCM_THP: |
| 1408 | { |
| 1409 | int table[6][16]; |
| 1410 | int ch; |
| 1411 | |
| 1412 | if (avctx->extradata) { |
| 1413 | GetByteContext tb; |
| 1414 | if (avctx->extradata_size < 32 * avctx->channels) { |
| 1415 | av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n"); |
| 1416 | return AVERROR_INVALIDDATA; |
| 1417 | } |
| 1418 | |
| 1419 | bytestream2_init(&tb, avctx->extradata, avctx->extradata_size); |
| 1420 | for (i = 0; i < avctx->channels; i++) |
| 1421 | for (n = 0; n < 16; n++) |
| 1422 | table[i][n] = sign_extend(bytestream2_get_be16u(&tb), 16); |
| 1423 | } else { |
| 1424 | for (i = 0; i < avctx->channels; i++) |
| 1425 | for (n = 0; n < 16; n++) |
| 1426 | table[i][n] = sign_extend(bytestream2_get_be16u(&gb), 16); |
| 1427 | |
| 1428 | /* Initialize the previous sample. */ |
| 1429 | for (i = 0; i < avctx->channels; i++) { |
| 1430 | c->status[i].sample1 = sign_extend(bytestream2_get_be16u(&gb), 16); |
| 1431 | c->status[i].sample2 = sign_extend(bytestream2_get_be16u(&gb), 16); |
| 1432 | } |
| 1433 | } |
| 1434 | |
| 1435 | for (ch = 0; ch < avctx->channels; ch++) { |
| 1436 | samples = samples_p[ch]; |
| 1437 | |
| 1438 | /* Read in every sample for this channel. */ |
| 1439 | for (i = 0; i < nb_samples / 14; i++) { |
| 1440 | int byte = bytestream2_get_byteu(&gb); |
| 1441 | int index = (byte >> 4) & 7; |
| 1442 | unsigned int exp = byte & 0x0F; |
| 1443 | int factor1 = table[ch][index * 2]; |
| 1444 | int factor2 = table[ch][index * 2 + 1]; |
| 1445 | |
| 1446 | /* Decode 14 samples. */ |
| 1447 | for (n = 0; n < 14; n++) { |
| 1448 | int32_t sampledat; |
| 1449 | |
| 1450 | if (n & 1) { |
| 1451 | sampledat = sign_extend(byte, 4); |
| 1452 | } else { |
| 1453 | byte = bytestream2_get_byteu(&gb); |
| 1454 | sampledat = sign_extend(byte >> 4, 4); |
| 1455 | } |
| 1456 | |
| 1457 | sampledat = ((c->status[ch].sample1 * factor1 |
| 1458 | + c->status[ch].sample2 * factor2) >> 11) + (sampledat << exp); |
| 1459 | *samples = av_clip_int16(sampledat); |
| 1460 | c->status[ch].sample2 = c->status[ch].sample1; |
| 1461 | c->status[ch].sample1 = *samples++; |
| 1462 | } |
| 1463 | } |
| 1464 | } |
| 1465 | break; |
| 1466 | } |
| 1467 | case AV_CODEC_ID_ADPCM_DTK: |
| 1468 | for (channel = 0; channel < avctx->channels; channel++) { |
| 1469 | samples = samples_p[channel]; |
| 1470 | |
| 1471 | /* Read in every sample for this channel. */ |
| 1472 | for (i = 0; i < nb_samples / 28; i++) { |
| 1473 | int byte, header; |
| 1474 | if (channel) |
| 1475 | bytestream2_skipu(&gb, 1); |
| 1476 | header = bytestream2_get_byteu(&gb); |
| 1477 | bytestream2_skipu(&gb, 3 - channel); |
| 1478 | |
| 1479 | /* Decode 28 samples. */ |
| 1480 | for (n = 0; n < 28; n++) { |
| 1481 | int32_t sampledat, prev; |
| 1482 | |
| 1483 | switch (header >> 4) { |
| 1484 | case 1: |
| 1485 | prev = (c->status[channel].sample1 * 0x3c); |
| 1486 | break; |
| 1487 | case 2: |
| 1488 | prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34); |
| 1489 | break; |
| 1490 | case 3: |
| 1491 | prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37); |
| 1492 | break; |
| 1493 | default: |
| 1494 | prev = 0; |
| 1495 | } |
| 1496 | |
| 1497 | prev = av_clip((prev + 0x20) >> 6, -0x200000, 0x1fffff); |
| 1498 | |
| 1499 | byte = bytestream2_get_byteu(&gb); |
| 1500 | if (!channel) |
| 1501 | sampledat = sign_extend(byte, 4); |
| 1502 | else |
| 1503 | sampledat = sign_extend(byte >> 4, 4); |
| 1504 | |
| 1505 | sampledat = (((sampledat << 12) >> (header & 0xf)) << 6) + prev; |
| 1506 | *samples++ = av_clip_int16(sampledat >> 6); |
| 1507 | c->status[channel].sample2 = c->status[channel].sample1; |
| 1508 | c->status[channel].sample1 = sampledat; |
| 1509 | } |
| 1510 | } |
| 1511 | if (!channel) |
| 1512 | bytestream2_seek(&gb, 0, SEEK_SET); |
| 1513 | } |
| 1514 | break; |
| 1515 | |
| 1516 | default: |
| 1517 | return -1; |
| 1518 | } |
| 1519 | |
| 1520 | if (avpkt->size && bytestream2_tell(&gb) == 0) { |
| 1521 | av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n"); |
| 1522 | return AVERROR_INVALIDDATA; |
| 1523 | } |
| 1524 | |
| 1525 | *got_frame_ptr = 1; |
| 1526 | |
| 1527 | return bytestream2_tell(&gb); |
| 1528 | } |
| 1529 | |
| 1530 | |
| 1531 | static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16, |
| 1532 | AV_SAMPLE_FMT_NONE }; |
| 1533 | static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P, |
| 1534 | AV_SAMPLE_FMT_NONE }; |
| 1535 | static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16, |
| 1536 | AV_SAMPLE_FMT_S16P, |
| 1537 | AV_SAMPLE_FMT_NONE }; |
| 1538 | |
| 1539 | #define ADPCM_DECODER(id_, sample_fmts_, name_, long_name_) \ |
| 1540 | AVCodec ff_ ## name_ ## _decoder = { \ |
| 1541 | .name = #name_, \ |
| 1542 | .long_name = NULL_IF_CONFIG_SMALL(long_name_), \ |
| 1543 | .type = AVMEDIA_TYPE_AUDIO, \ |
| 1544 | .id = id_, \ |
| 1545 | .priv_data_size = sizeof(ADPCMDecodeContext), \ |
| 1546 | .init = adpcm_decode_init, \ |
| 1547 | .decode = adpcm_decode_frame, \ |
| 1548 | .capabilities = CODEC_CAP_DR1, \ |
| 1549 | .sample_fmts = sample_fmts_, \ |
| 1550 | } |
| 1551 | |
| 1552 | /* Note: Do not forget to add new entries to the Makefile as well. */ |
| 1553 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie"); |
| 1554 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC"); |
| 1555 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology"); |
| 1556 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK"); |
| 1557 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts"); |
| 1558 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA"); |
| 1559 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1"); |
| 1560 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2"); |
| 1561 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3"); |
| 1562 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS"); |
| 1563 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV"); |
| 1564 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC"); |
| 1565 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3"); |
| 1566 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4"); |
| 1567 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS"); |
| 1568 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD"); |
| 1569 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS"); |
| 1570 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI"); |
| 1571 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime"); |
| 1572 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical"); |
| 1573 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG"); |
| 1574 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV"); |
| 1575 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood"); |
| 1576 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_MS, sample_fmts_s16, adpcm_ms, "ADPCM Microsoft"); |
| 1577 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit"); |
| 1578 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit"); |
| 1579 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit"); |
| 1580 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash"); |
| 1581 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo Gamecube THP"); |
| 1582 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA"); |
| 1583 | ADPCM_DECODER(AV_CODEC_ID_ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha"); |