| 1 | /* |
| 2 | * WavPack lossless audio decoder |
| 3 | * Copyright (c) 2006,2011 Konstantin Shishkov |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | #define BITSTREAM_READER_LE |
| 23 | |
| 24 | #include "libavutil/channel_layout.h" |
| 25 | #include "avcodec.h" |
| 26 | #include "get_bits.h" |
| 27 | #include "internal.h" |
| 28 | #include "thread.h" |
| 29 | #include "unary.h" |
| 30 | #include "bytestream.h" |
| 31 | #include "wavpack.h" |
| 32 | |
| 33 | /** |
| 34 | * @file |
| 35 | * WavPack lossless audio decoder |
| 36 | */ |
| 37 | |
| 38 | typedef struct SavedContext { |
| 39 | int offset; |
| 40 | int size; |
| 41 | int bits_used; |
| 42 | uint32_t crc; |
| 43 | } SavedContext; |
| 44 | |
| 45 | typedef struct WavpackFrameContext { |
| 46 | AVCodecContext *avctx; |
| 47 | int frame_flags; |
| 48 | int stereo, stereo_in; |
| 49 | int joint; |
| 50 | uint32_t CRC; |
| 51 | GetBitContext gb; |
| 52 | int got_extra_bits; |
| 53 | uint32_t crc_extra_bits; |
| 54 | GetBitContext gb_extra_bits; |
| 55 | int data_size; // in bits |
| 56 | int samples; |
| 57 | int terms; |
| 58 | Decorr decorr[MAX_TERMS]; |
| 59 | int zero, one, zeroes; |
| 60 | int extra_bits; |
| 61 | int and, or, shift; |
| 62 | int post_shift; |
| 63 | int hybrid, hybrid_bitrate; |
| 64 | int hybrid_maxclip, hybrid_minclip; |
| 65 | int float_flag; |
| 66 | int float_shift; |
| 67 | int float_max_exp; |
| 68 | WvChannel ch[2]; |
| 69 | int pos; |
| 70 | SavedContext sc, extra_sc; |
| 71 | } WavpackFrameContext; |
| 72 | |
| 73 | #define WV_MAX_FRAME_DECODERS 14 |
| 74 | |
| 75 | typedef struct WavpackContext { |
| 76 | AVCodecContext *avctx; |
| 77 | |
| 78 | WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS]; |
| 79 | int fdec_num; |
| 80 | |
| 81 | int block; |
| 82 | int samples; |
| 83 | int ch_offset; |
| 84 | } WavpackContext; |
| 85 | |
| 86 | #define LEVEL_DECAY(a) (((a) + 0x80) >> 8) |
| 87 | |
| 88 | static av_always_inline int get_tail(GetBitContext *gb, int k) |
| 89 | { |
| 90 | int p, e, res; |
| 91 | |
| 92 | if (k < 1) |
| 93 | return 0; |
| 94 | p = av_log2(k); |
| 95 | e = (1 << (p + 1)) - k - 1; |
| 96 | res = p ? get_bits(gb, p) : 0; |
| 97 | if (res >= e) |
| 98 | res = (res << 1) - e + get_bits1(gb); |
| 99 | return res; |
| 100 | } |
| 101 | |
| 102 | static void update_error_limit(WavpackFrameContext *ctx) |
| 103 | { |
| 104 | int i, br[2], sl[2]; |
| 105 | |
| 106 | for (i = 0; i <= ctx->stereo_in; i++) { |
| 107 | ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta; |
| 108 | br[i] = ctx->ch[i].bitrate_acc >> 16; |
| 109 | sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level); |
| 110 | } |
| 111 | if (ctx->stereo_in && ctx->hybrid_bitrate) { |
| 112 | int balance = (sl[1] - sl[0] + br[1] + 1) >> 1; |
| 113 | if (balance > br[0]) { |
| 114 | br[1] = br[0] << 1; |
| 115 | br[0] = 0; |
| 116 | } else if (-balance > br[0]) { |
| 117 | br[0] <<= 1; |
| 118 | br[1] = 0; |
| 119 | } else { |
| 120 | br[1] = br[0] + balance; |
| 121 | br[0] = br[0] - balance; |
| 122 | } |
| 123 | } |
| 124 | for (i = 0; i <= ctx->stereo_in; i++) { |
| 125 | if (ctx->hybrid_bitrate) { |
| 126 | if (sl[i] - br[i] > -0x100) |
| 127 | ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100); |
| 128 | else |
| 129 | ctx->ch[i].error_limit = 0; |
| 130 | } else { |
| 131 | ctx->ch[i].error_limit = wp_exp2(br[i]); |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb, |
| 137 | int channel, int *last) |
| 138 | { |
| 139 | int t, t2; |
| 140 | int sign, base, add, ret; |
| 141 | WvChannel *c = &ctx->ch[channel]; |
| 142 | |
| 143 | *last = 0; |
| 144 | |
| 145 | if ((ctx->ch[0].median[0] < 2U) && (ctx->ch[1].median[0] < 2U) && |
| 146 | !ctx->zero && !ctx->one) { |
| 147 | if (ctx->zeroes) { |
| 148 | ctx->zeroes--; |
| 149 | if (ctx->zeroes) { |
| 150 | c->slow_level -= LEVEL_DECAY(c->slow_level); |
| 151 | return 0; |
| 152 | } |
| 153 | } else { |
| 154 | t = get_unary_0_33(gb); |
| 155 | if (t >= 2) { |
| 156 | if (get_bits_left(gb) < t - 1) |
| 157 | goto error; |
| 158 | t = get_bits(gb, t - 1) | (1 << (t - 1)); |
| 159 | } else { |
| 160 | if (get_bits_left(gb) < 0) |
| 161 | goto error; |
| 162 | } |
| 163 | ctx->zeroes = t; |
| 164 | if (ctx->zeroes) { |
| 165 | memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median)); |
| 166 | memset(ctx->ch[1].median, 0, sizeof(ctx->ch[1].median)); |
| 167 | c->slow_level -= LEVEL_DECAY(c->slow_level); |
| 168 | return 0; |
| 169 | } |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | if (ctx->zero) { |
| 174 | t = 0; |
| 175 | ctx->zero = 0; |
| 176 | } else { |
| 177 | t = get_unary_0_33(gb); |
| 178 | if (get_bits_left(gb) < 0) |
| 179 | goto error; |
| 180 | if (t == 16) { |
| 181 | t2 = get_unary_0_33(gb); |
| 182 | if (t2 < 2) { |
| 183 | if (get_bits_left(gb) < 0) |
| 184 | goto error; |
| 185 | t += t2; |
| 186 | } else { |
| 187 | if (get_bits_left(gb) < t2 - 1) |
| 188 | goto error; |
| 189 | t += get_bits(gb, t2 - 1) | (1 << (t2 - 1)); |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | if (ctx->one) { |
| 194 | ctx->one = t & 1; |
| 195 | t = (t >> 1) + 1; |
| 196 | } else { |
| 197 | ctx->one = t & 1; |
| 198 | t >>= 1; |
| 199 | } |
| 200 | ctx->zero = !ctx->one; |
| 201 | } |
| 202 | |
| 203 | if (ctx->hybrid && !channel) |
| 204 | update_error_limit(ctx); |
| 205 | |
| 206 | if (!t) { |
| 207 | base = 0; |
| 208 | add = GET_MED(0) - 1; |
| 209 | DEC_MED(0); |
| 210 | } else if (t == 1) { |
| 211 | base = GET_MED(0); |
| 212 | add = GET_MED(1) - 1; |
| 213 | INC_MED(0); |
| 214 | DEC_MED(1); |
| 215 | } else if (t == 2) { |
| 216 | base = GET_MED(0) + GET_MED(1); |
| 217 | add = GET_MED(2) - 1; |
| 218 | INC_MED(0); |
| 219 | INC_MED(1); |
| 220 | DEC_MED(2); |
| 221 | } else { |
| 222 | base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2); |
| 223 | add = GET_MED(2) - 1; |
| 224 | INC_MED(0); |
| 225 | INC_MED(1); |
| 226 | INC_MED(2); |
| 227 | } |
| 228 | if (!c->error_limit) { |
| 229 | if (add >= 0x2000000U) { |
| 230 | av_log(ctx->avctx, AV_LOG_ERROR, "k %d is too large\n", add); |
| 231 | goto error; |
| 232 | } |
| 233 | ret = base + get_tail(gb, add); |
| 234 | if (get_bits_left(gb) <= 0) |
| 235 | goto error; |
| 236 | } else { |
| 237 | int mid = (base * 2 + add + 1) >> 1; |
| 238 | while (add > c->error_limit) { |
| 239 | if (get_bits_left(gb) <= 0) |
| 240 | goto error; |
| 241 | if (get_bits1(gb)) { |
| 242 | add -= (mid - base); |
| 243 | base = mid; |
| 244 | } else |
| 245 | add = mid - base - 1; |
| 246 | mid = (base * 2 + add + 1) >> 1; |
| 247 | } |
| 248 | ret = mid; |
| 249 | } |
| 250 | sign = get_bits1(gb); |
| 251 | if (ctx->hybrid_bitrate) |
| 252 | c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level); |
| 253 | return sign ? ~ret : ret; |
| 254 | |
| 255 | error: |
| 256 | ret = get_bits_left(gb); |
| 257 | if (ret <= 0) { |
| 258 | av_log(ctx->avctx, AV_LOG_ERROR, "Too few bits (%d) left\n", ret); |
| 259 | } |
| 260 | *last = 1; |
| 261 | return 0; |
| 262 | } |
| 263 | |
| 264 | static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc, |
| 265 | int S) |
| 266 | { |
| 267 | int bit; |
| 268 | |
| 269 | if (s->extra_bits) { |
| 270 | S <<= s->extra_bits; |
| 271 | |
| 272 | if (s->got_extra_bits && |
| 273 | get_bits_left(&s->gb_extra_bits) >= s->extra_bits) { |
| 274 | S |= get_bits(&s->gb_extra_bits, s->extra_bits); |
| 275 | *crc = *crc * 9 + (S & 0xffff) * 3 + ((unsigned)S >> 16); |
| 276 | } |
| 277 | } |
| 278 | |
| 279 | bit = (S & s->and) | s->or; |
| 280 | bit = ((S + bit) << s->shift) - bit; |
| 281 | |
| 282 | if (s->hybrid) |
| 283 | bit = av_clip(bit, s->hybrid_minclip, s->hybrid_maxclip); |
| 284 | |
| 285 | return bit << s->post_shift; |
| 286 | } |
| 287 | |
| 288 | static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S) |
| 289 | { |
| 290 | union { |
| 291 | float f; |
| 292 | uint32_t u; |
| 293 | } value; |
| 294 | |
| 295 | unsigned int sign; |
| 296 | int exp = s->float_max_exp; |
| 297 | |
| 298 | if (s->got_extra_bits) { |
| 299 | const int max_bits = 1 + 23 + 8 + 1; |
| 300 | const int left_bits = get_bits_left(&s->gb_extra_bits); |
| 301 | |
| 302 | if (left_bits + 8 * FF_INPUT_BUFFER_PADDING_SIZE < max_bits) |
| 303 | return 0.0; |
| 304 | } |
| 305 | |
| 306 | if (S) { |
| 307 | S <<= s->float_shift; |
| 308 | sign = S < 0; |
| 309 | if (sign) |
| 310 | S = -S; |
| 311 | if (S >= 0x1000000) { |
| 312 | if (s->got_extra_bits && get_bits1(&s->gb_extra_bits)) |
| 313 | S = get_bits(&s->gb_extra_bits, 23); |
| 314 | else |
| 315 | S = 0; |
| 316 | exp = 255; |
| 317 | } else if (exp) { |
| 318 | int shift = 23 - av_log2(S); |
| 319 | exp = s->float_max_exp; |
| 320 | if (exp <= shift) |
| 321 | shift = --exp; |
| 322 | exp -= shift; |
| 323 | |
| 324 | if (shift) { |
| 325 | S <<= shift; |
| 326 | if ((s->float_flag & WV_FLT_SHIFT_ONES) || |
| 327 | (s->got_extra_bits && |
| 328 | (s->float_flag & WV_FLT_SHIFT_SAME) && |
| 329 | get_bits1(&s->gb_extra_bits))) { |
| 330 | S |= (1 << shift) - 1; |
| 331 | } else if (s->got_extra_bits && |
| 332 | (s->float_flag & WV_FLT_SHIFT_SENT)) { |
| 333 | S |= get_bits(&s->gb_extra_bits, shift); |
| 334 | } |
| 335 | } |
| 336 | } else { |
| 337 | exp = s->float_max_exp; |
| 338 | } |
| 339 | S &= 0x7fffff; |
| 340 | } else { |
| 341 | sign = 0; |
| 342 | exp = 0; |
| 343 | if (s->got_extra_bits && (s->float_flag & WV_FLT_ZERO_SENT)) { |
| 344 | if (get_bits1(&s->gb_extra_bits)) { |
| 345 | S = get_bits(&s->gb_extra_bits, 23); |
| 346 | if (s->float_max_exp >= 25) |
| 347 | exp = get_bits(&s->gb_extra_bits, 8); |
| 348 | sign = get_bits1(&s->gb_extra_bits); |
| 349 | } else { |
| 350 | if (s->float_flag & WV_FLT_ZERO_SIGN) |
| 351 | sign = get_bits1(&s->gb_extra_bits); |
| 352 | } |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | *crc = *crc * 27 + S * 9 + exp * 3 + sign; |
| 357 | |
| 358 | value.u = (sign << 31) | (exp << 23) | S; |
| 359 | return value.f; |
| 360 | } |
| 361 | |
| 362 | static void wv_reset_saved_context(WavpackFrameContext *s) |
| 363 | { |
| 364 | s->pos = 0; |
| 365 | s->sc.crc = s->extra_sc.crc = 0xFFFFFFFF; |
| 366 | } |
| 367 | |
| 368 | static inline int wv_check_crc(WavpackFrameContext *s, uint32_t crc, |
| 369 | uint32_t crc_extra_bits) |
| 370 | { |
| 371 | if (crc != s->CRC) { |
| 372 | av_log(s->avctx, AV_LOG_ERROR, "CRC error\n"); |
| 373 | return AVERROR_INVALIDDATA; |
| 374 | } |
| 375 | if (s->got_extra_bits && crc_extra_bits != s->crc_extra_bits) { |
| 376 | av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n"); |
| 377 | return AVERROR_INVALIDDATA; |
| 378 | } |
| 379 | |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb, |
| 384 | void *dst_l, void *dst_r, const int type) |
| 385 | { |
| 386 | int i, j, count = 0; |
| 387 | int last, t; |
| 388 | int A, B, L, L2, R, R2; |
| 389 | int pos = s->pos; |
| 390 | uint32_t crc = s->sc.crc; |
| 391 | uint32_t crc_extra_bits = s->extra_sc.crc; |
| 392 | int16_t *dst16_l = dst_l; |
| 393 | int16_t *dst16_r = dst_r; |
| 394 | int32_t *dst32_l = dst_l; |
| 395 | int32_t *dst32_r = dst_r; |
| 396 | float *dstfl_l = dst_l; |
| 397 | float *dstfl_r = dst_r; |
| 398 | |
| 399 | s->one = s->zero = s->zeroes = 0; |
| 400 | do { |
| 401 | L = wv_get_value(s, gb, 0, &last); |
| 402 | if (last) |
| 403 | break; |
| 404 | R = wv_get_value(s, gb, 1, &last); |
| 405 | if (last) |
| 406 | break; |
| 407 | for (i = 0; i < s->terms; i++) { |
| 408 | t = s->decorr[i].value; |
| 409 | if (t > 0) { |
| 410 | if (t > 8) { |
| 411 | if (t & 1) { |
| 412 | A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; |
| 413 | B = 2 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]; |
| 414 | } else { |
| 415 | A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; |
| 416 | B = (3 * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]) >> 1; |
| 417 | } |
| 418 | s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; |
| 419 | s->decorr[i].samplesB[1] = s->decorr[i].samplesB[0]; |
| 420 | j = 0; |
| 421 | } else { |
| 422 | A = s->decorr[i].samplesA[pos]; |
| 423 | B = s->decorr[i].samplesB[pos]; |
| 424 | j = (pos + t) & 7; |
| 425 | } |
| 426 | if (type != AV_SAMPLE_FMT_S16P) { |
| 427 | L2 = L + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); |
| 428 | R2 = R + ((s->decorr[i].weightB * (int64_t)B + 512) >> 10); |
| 429 | } else { |
| 430 | L2 = L + ((s->decorr[i].weightA * A + 512) >> 10); |
| 431 | R2 = R + ((s->decorr[i].weightB * B + 512) >> 10); |
| 432 | } |
| 433 | if (A && L) |
| 434 | s->decorr[i].weightA -= ((((L ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; |
| 435 | if (B && R) |
| 436 | s->decorr[i].weightB -= ((((R ^ B) >> 30) & 2) - 1) * s->decorr[i].delta; |
| 437 | s->decorr[i].samplesA[j] = L = L2; |
| 438 | s->decorr[i].samplesB[j] = R = R2; |
| 439 | } else if (t == -1) { |
| 440 | if (type != AV_SAMPLE_FMT_S16P) |
| 441 | L2 = L + ((s->decorr[i].weightA * (int64_t)s->decorr[i].samplesA[0] + 512) >> 10); |
| 442 | else |
| 443 | L2 = L + ((s->decorr[i].weightA * s->decorr[i].samplesA[0] + 512) >> 10); |
| 444 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, s->decorr[i].samplesA[0], L); |
| 445 | L = L2; |
| 446 | if (type != AV_SAMPLE_FMT_S16P) |
| 447 | R2 = R + ((s->decorr[i].weightB * (int64_t)L2 + 512) >> 10); |
| 448 | else |
| 449 | R2 = R + ((s->decorr[i].weightB * L2 + 512) >> 10); |
| 450 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, L2, R); |
| 451 | R = R2; |
| 452 | s->decorr[i].samplesA[0] = R; |
| 453 | } else { |
| 454 | if (type != AV_SAMPLE_FMT_S16P) |
| 455 | R2 = R + ((s->decorr[i].weightB * (int64_t)s->decorr[i].samplesB[0] + 512) >> 10); |
| 456 | else |
| 457 | R2 = R + ((s->decorr[i].weightB * s->decorr[i].samplesB[0] + 512) >> 10); |
| 458 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, s->decorr[i].samplesB[0], R); |
| 459 | R = R2; |
| 460 | |
| 461 | if (t == -3) { |
| 462 | R2 = s->decorr[i].samplesA[0]; |
| 463 | s->decorr[i].samplesA[0] = R; |
| 464 | } |
| 465 | |
| 466 | if (type != AV_SAMPLE_FMT_S16P) |
| 467 | L2 = L + ((s->decorr[i].weightA * (int64_t)R2 + 512) >> 10); |
| 468 | else |
| 469 | L2 = L + ((s->decorr[i].weightA * R2 + 512) >> 10); |
| 470 | UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, R2, L); |
| 471 | L = L2; |
| 472 | s->decorr[i].samplesB[0] = L; |
| 473 | } |
| 474 | } |
| 475 | pos = (pos + 1) & 7; |
| 476 | if (s->joint) |
| 477 | L += (R -= (L >> 1)); |
| 478 | crc = (crc * 3 + L) * 3 + R; |
| 479 | |
| 480 | if (type == AV_SAMPLE_FMT_FLTP) { |
| 481 | *dstfl_l++ = wv_get_value_float(s, &crc_extra_bits, L); |
| 482 | *dstfl_r++ = wv_get_value_float(s, &crc_extra_bits, R); |
| 483 | } else if (type == AV_SAMPLE_FMT_S32P) { |
| 484 | *dst32_l++ = wv_get_value_integer(s, &crc_extra_bits, L); |
| 485 | *dst32_r++ = wv_get_value_integer(s, &crc_extra_bits, R); |
| 486 | } else { |
| 487 | *dst16_l++ = wv_get_value_integer(s, &crc_extra_bits, L); |
| 488 | *dst16_r++ = wv_get_value_integer(s, &crc_extra_bits, R); |
| 489 | } |
| 490 | count++; |
| 491 | } while (!last && count < s->samples); |
| 492 | |
| 493 | wv_reset_saved_context(s); |
| 494 | |
| 495 | if (last && count < s->samples) { |
| 496 | int size = av_get_bytes_per_sample(type); |
| 497 | memset((uint8_t*)dst_l + count*size, 0, (s->samples-count)*size); |
| 498 | memset((uint8_t*)dst_r + count*size, 0, (s->samples-count)*size); |
| 499 | } |
| 500 | |
| 501 | if ((s->avctx->err_recognition & AV_EF_CRCCHECK) && |
| 502 | wv_check_crc(s, crc, crc_extra_bits)) |
| 503 | return AVERROR_INVALIDDATA; |
| 504 | |
| 505 | return 0; |
| 506 | } |
| 507 | |
| 508 | static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb, |
| 509 | void *dst, const int type) |
| 510 | { |
| 511 | int i, j, count = 0; |
| 512 | int last, t; |
| 513 | int A, S, T; |
| 514 | int pos = s->pos; |
| 515 | uint32_t crc = s->sc.crc; |
| 516 | uint32_t crc_extra_bits = s->extra_sc.crc; |
| 517 | int16_t *dst16 = dst; |
| 518 | int32_t *dst32 = dst; |
| 519 | float *dstfl = dst; |
| 520 | |
| 521 | s->one = s->zero = s->zeroes = 0; |
| 522 | do { |
| 523 | T = wv_get_value(s, gb, 0, &last); |
| 524 | S = 0; |
| 525 | if (last) |
| 526 | break; |
| 527 | for (i = 0; i < s->terms; i++) { |
| 528 | t = s->decorr[i].value; |
| 529 | if (t > 8) { |
| 530 | if (t & 1) |
| 531 | A = 2 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; |
| 532 | else |
| 533 | A = (3 * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; |
| 534 | s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; |
| 535 | j = 0; |
| 536 | } else { |
| 537 | A = s->decorr[i].samplesA[pos]; |
| 538 | j = (pos + t) & 7; |
| 539 | } |
| 540 | if (type != AV_SAMPLE_FMT_S16P) |
| 541 | S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); |
| 542 | else |
| 543 | S = T + ((s->decorr[i].weightA * A + 512) >> 10); |
| 544 | if (A && T) |
| 545 | s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; |
| 546 | s->decorr[i].samplesA[j] = T = S; |
| 547 | } |
| 548 | pos = (pos + 1) & 7; |
| 549 | crc = crc * 3 + S; |
| 550 | |
| 551 | if (type == AV_SAMPLE_FMT_FLTP) { |
| 552 | *dstfl++ = wv_get_value_float(s, &crc_extra_bits, S); |
| 553 | } else if (type == AV_SAMPLE_FMT_S32P) { |
| 554 | *dst32++ = wv_get_value_integer(s, &crc_extra_bits, S); |
| 555 | } else { |
| 556 | *dst16++ = wv_get_value_integer(s, &crc_extra_bits, S); |
| 557 | } |
| 558 | count++; |
| 559 | } while (!last && count < s->samples); |
| 560 | |
| 561 | wv_reset_saved_context(s); |
| 562 | |
| 563 | if (last && count < s->samples) { |
| 564 | int size = av_get_bytes_per_sample(type); |
| 565 | memset((uint8_t*)dst + count*size, 0, (s->samples-count)*size); |
| 566 | } |
| 567 | |
| 568 | if (s->avctx->err_recognition & AV_EF_CRCCHECK) { |
| 569 | int ret = wv_check_crc(s, crc, crc_extra_bits); |
| 570 | if (ret < 0 && s->avctx->err_recognition & AV_EF_EXPLODE) |
| 571 | return ret; |
| 572 | } |
| 573 | |
| 574 | return 0; |
| 575 | } |
| 576 | |
| 577 | static av_cold int wv_alloc_frame_context(WavpackContext *c) |
| 578 | { |
| 579 | if (c->fdec_num == WV_MAX_FRAME_DECODERS) |
| 580 | return -1; |
| 581 | |
| 582 | c->fdec[c->fdec_num] = av_mallocz(sizeof(**c->fdec)); |
| 583 | if (!c->fdec[c->fdec_num]) |
| 584 | return -1; |
| 585 | c->fdec_num++; |
| 586 | c->fdec[c->fdec_num - 1]->avctx = c->avctx; |
| 587 | wv_reset_saved_context(c->fdec[c->fdec_num - 1]); |
| 588 | |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | static int init_thread_copy(AVCodecContext *avctx) |
| 593 | { |
| 594 | WavpackContext *s = avctx->priv_data; |
| 595 | s->avctx = avctx; |
| 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | static av_cold int wavpack_decode_init(AVCodecContext *avctx) |
| 600 | { |
| 601 | WavpackContext *s = avctx->priv_data; |
| 602 | |
| 603 | s->avctx = avctx; |
| 604 | |
| 605 | s->fdec_num = 0; |
| 606 | |
| 607 | return 0; |
| 608 | } |
| 609 | |
| 610 | static av_cold int wavpack_decode_end(AVCodecContext *avctx) |
| 611 | { |
| 612 | WavpackContext *s = avctx->priv_data; |
| 613 | int i; |
| 614 | |
| 615 | for (i = 0; i < s->fdec_num; i++) |
| 616 | av_freep(&s->fdec[i]); |
| 617 | s->fdec_num = 0; |
| 618 | |
| 619 | return 0; |
| 620 | } |
| 621 | |
| 622 | static int wavpack_decode_block(AVCodecContext *avctx, int block_no, |
| 623 | AVFrame *frame, const uint8_t *buf, int buf_size) |
| 624 | { |
| 625 | WavpackContext *wc = avctx->priv_data; |
| 626 | ThreadFrame tframe = { .f = frame }; |
| 627 | WavpackFrameContext *s; |
| 628 | GetByteContext gb; |
| 629 | void *samples_l = NULL, *samples_r = NULL; |
| 630 | int ret; |
| 631 | int got_terms = 0, got_weights = 0, got_samples = 0, |
| 632 | got_entropy = 0, got_bs = 0, got_float = 0, got_hybrid = 0; |
| 633 | int i, j, id, size, ssize, weights, t; |
| 634 | int bpp, chan = 0, chmask = 0, orig_bpp, sample_rate = 0; |
| 635 | int multiblock; |
| 636 | |
| 637 | if (block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0) { |
| 638 | av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n"); |
| 639 | return AVERROR_INVALIDDATA; |
| 640 | } |
| 641 | |
| 642 | s = wc->fdec[block_no]; |
| 643 | if (!s) { |
| 644 | av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n", |
| 645 | block_no); |
| 646 | return AVERROR_INVALIDDATA; |
| 647 | } |
| 648 | |
| 649 | memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr)); |
| 650 | memset(s->ch, 0, sizeof(s->ch)); |
| 651 | s->extra_bits = 0; |
| 652 | s->and = s->or = s->shift = 0; |
| 653 | s->got_extra_bits = 0; |
| 654 | |
| 655 | bytestream2_init(&gb, buf, buf_size); |
| 656 | |
| 657 | s->samples = bytestream2_get_le32(&gb); |
| 658 | if (s->samples != wc->samples) { |
| 659 | av_log(avctx, AV_LOG_ERROR, "Mismatching number of samples in " |
| 660 | "a sequence: %d and %d\n", wc->samples, s->samples); |
| 661 | return AVERROR_INVALIDDATA; |
| 662 | } |
| 663 | s->frame_flags = bytestream2_get_le32(&gb); |
| 664 | bpp = av_get_bytes_per_sample(avctx->sample_fmt); |
| 665 | orig_bpp = ((s->frame_flags & 0x03) + 1) << 3; |
| 666 | multiblock = (s->frame_flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK; |
| 667 | |
| 668 | s->stereo = !(s->frame_flags & WV_MONO); |
| 669 | s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo; |
| 670 | s->joint = s->frame_flags & WV_JOINT_STEREO; |
| 671 | s->hybrid = s->frame_flags & WV_HYBRID_MODE; |
| 672 | s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE; |
| 673 | s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f); |
| 674 | s->hybrid_maxclip = ((1LL << (orig_bpp - 1)) - 1); |
| 675 | s->hybrid_minclip = ((-1LL << (orig_bpp - 1))); |
| 676 | s->CRC = bytestream2_get_le32(&gb); |
| 677 | |
| 678 | // parse metadata blocks |
| 679 | while (bytestream2_get_bytes_left(&gb)) { |
| 680 | id = bytestream2_get_byte(&gb); |
| 681 | size = bytestream2_get_byte(&gb); |
| 682 | if (id & WP_IDF_LONG) { |
| 683 | size |= (bytestream2_get_byte(&gb)) << 8; |
| 684 | size |= (bytestream2_get_byte(&gb)) << 16; |
| 685 | } |
| 686 | size <<= 1; // size is specified in words |
| 687 | ssize = size; |
| 688 | if (id & WP_IDF_ODD) |
| 689 | size--; |
| 690 | if (size < 0) { |
| 691 | av_log(avctx, AV_LOG_ERROR, |
| 692 | "Got incorrect block %02X with size %i\n", id, size); |
| 693 | break; |
| 694 | } |
| 695 | if (bytestream2_get_bytes_left(&gb) < ssize) { |
| 696 | av_log(avctx, AV_LOG_ERROR, |
| 697 | "Block size %i is out of bounds\n", size); |
| 698 | break; |
| 699 | } |
| 700 | switch (id & WP_IDF_MASK) { |
| 701 | case WP_ID_DECTERMS: |
| 702 | if (size > MAX_TERMS) { |
| 703 | av_log(avctx, AV_LOG_ERROR, "Too many decorrelation terms\n"); |
| 704 | s->terms = 0; |
| 705 | bytestream2_skip(&gb, ssize); |
| 706 | continue; |
| 707 | } |
| 708 | s->terms = size; |
| 709 | for (i = 0; i < s->terms; i++) { |
| 710 | uint8_t val = bytestream2_get_byte(&gb); |
| 711 | s->decorr[s->terms - i - 1].value = (val & 0x1F) - 5; |
| 712 | s->decorr[s->terms - i - 1].delta = val >> 5; |
| 713 | } |
| 714 | got_terms = 1; |
| 715 | break; |
| 716 | case WP_ID_DECWEIGHTS: |
| 717 | if (!got_terms) { |
| 718 | av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); |
| 719 | continue; |
| 720 | } |
| 721 | weights = size >> s->stereo_in; |
| 722 | if (weights > MAX_TERMS || weights > s->terms) { |
| 723 | av_log(avctx, AV_LOG_ERROR, "Too many decorrelation weights\n"); |
| 724 | bytestream2_skip(&gb, ssize); |
| 725 | continue; |
| 726 | } |
| 727 | for (i = 0; i < weights; i++) { |
| 728 | t = (int8_t)bytestream2_get_byte(&gb); |
| 729 | s->decorr[s->terms - i - 1].weightA = t << 3; |
| 730 | if (s->decorr[s->terms - i - 1].weightA > 0) |
| 731 | s->decorr[s->terms - i - 1].weightA += |
| 732 | (s->decorr[s->terms - i - 1].weightA + 64) >> 7; |
| 733 | if (s->stereo_in) { |
| 734 | t = (int8_t)bytestream2_get_byte(&gb); |
| 735 | s->decorr[s->terms - i - 1].weightB = t << 3; |
| 736 | if (s->decorr[s->terms - i - 1].weightB > 0) |
| 737 | s->decorr[s->terms - i - 1].weightB += |
| 738 | (s->decorr[s->terms - i - 1].weightB + 64) >> 7; |
| 739 | } |
| 740 | } |
| 741 | got_weights = 1; |
| 742 | break; |
| 743 | case WP_ID_DECSAMPLES: |
| 744 | if (!got_terms) { |
| 745 | av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); |
| 746 | continue; |
| 747 | } |
| 748 | t = 0; |
| 749 | for (i = s->terms - 1; (i >= 0) && (t < size); i--) { |
| 750 | if (s->decorr[i].value > 8) { |
| 751 | s->decorr[i].samplesA[0] = |
| 752 | wp_exp2(bytestream2_get_le16(&gb)); |
| 753 | s->decorr[i].samplesA[1] = |
| 754 | wp_exp2(bytestream2_get_le16(&gb)); |
| 755 | |
| 756 | if (s->stereo_in) { |
| 757 | s->decorr[i].samplesB[0] = |
| 758 | wp_exp2(bytestream2_get_le16(&gb)); |
| 759 | s->decorr[i].samplesB[1] = |
| 760 | wp_exp2(bytestream2_get_le16(&gb)); |
| 761 | t += 4; |
| 762 | } |
| 763 | t += 4; |
| 764 | } else if (s->decorr[i].value < 0) { |
| 765 | s->decorr[i].samplesA[0] = |
| 766 | wp_exp2(bytestream2_get_le16(&gb)); |
| 767 | s->decorr[i].samplesB[0] = |
| 768 | wp_exp2(bytestream2_get_le16(&gb)); |
| 769 | t += 4; |
| 770 | } else { |
| 771 | for (j = 0; j < s->decorr[i].value; j++) { |
| 772 | s->decorr[i].samplesA[j] = |
| 773 | wp_exp2(bytestream2_get_le16(&gb)); |
| 774 | if (s->stereo_in) { |
| 775 | s->decorr[i].samplesB[j] = |
| 776 | wp_exp2(bytestream2_get_le16(&gb)); |
| 777 | } |
| 778 | } |
| 779 | t += s->decorr[i].value * 2 * (s->stereo_in + 1); |
| 780 | } |
| 781 | } |
| 782 | got_samples = 1; |
| 783 | break; |
| 784 | case WP_ID_ENTROPY: |
| 785 | if (size != 6 * (s->stereo_in + 1)) { |
| 786 | av_log(avctx, AV_LOG_ERROR, |
| 787 | "Entropy vars size should be %i, got %i.\n", |
| 788 | 6 * (s->stereo_in + 1), size); |
| 789 | bytestream2_skip(&gb, ssize); |
| 790 | continue; |
| 791 | } |
| 792 | for (j = 0; j <= s->stereo_in; j++) |
| 793 | for (i = 0; i < 3; i++) { |
| 794 | s->ch[j].median[i] = wp_exp2(bytestream2_get_le16(&gb)); |
| 795 | } |
| 796 | got_entropy = 1; |
| 797 | break; |
| 798 | case WP_ID_HYBRID: |
| 799 | if (s->hybrid_bitrate) { |
| 800 | for (i = 0; i <= s->stereo_in; i++) { |
| 801 | s->ch[i].slow_level = wp_exp2(bytestream2_get_le16(&gb)); |
| 802 | size -= 2; |
| 803 | } |
| 804 | } |
| 805 | for (i = 0; i < (s->stereo_in + 1); i++) { |
| 806 | s->ch[i].bitrate_acc = bytestream2_get_le16(&gb) << 16; |
| 807 | size -= 2; |
| 808 | } |
| 809 | if (size > 0) { |
| 810 | for (i = 0; i < (s->stereo_in + 1); i++) { |
| 811 | s->ch[i].bitrate_delta = |
| 812 | wp_exp2((int16_t)bytestream2_get_le16(&gb)); |
| 813 | } |
| 814 | } else { |
| 815 | for (i = 0; i < (s->stereo_in + 1); i++) |
| 816 | s->ch[i].bitrate_delta = 0; |
| 817 | } |
| 818 | got_hybrid = 1; |
| 819 | break; |
| 820 | case WP_ID_INT32INFO: { |
| 821 | uint8_t val[4]; |
| 822 | if (size != 4) { |
| 823 | av_log(avctx, AV_LOG_ERROR, |
| 824 | "Invalid INT32INFO, size = %i\n", |
| 825 | size); |
| 826 | bytestream2_skip(&gb, ssize - 4); |
| 827 | continue; |
| 828 | } |
| 829 | bytestream2_get_buffer(&gb, val, 4); |
| 830 | if (val[0]) { |
| 831 | s->extra_bits = val[0]; |
| 832 | } else if (val[1]) { |
| 833 | s->shift = val[1]; |
| 834 | } else if (val[2]) { |
| 835 | s->and = s->or = 1; |
| 836 | s->shift = val[2]; |
| 837 | } else if (val[3]) { |
| 838 | s->and = 1; |
| 839 | s->shift = val[3]; |
| 840 | } |
| 841 | /* original WavPack decoder forces 32-bit lossy sound to be treated |
| 842 | * as 24-bit one in order to have proper clipping */ |
| 843 | if (s->hybrid && bpp == 4 && s->post_shift < 8 && s->shift > 8) { |
| 844 | s->post_shift += 8; |
| 845 | s->shift -= 8; |
| 846 | s->hybrid_maxclip >>= 8; |
| 847 | s->hybrid_minclip >>= 8; |
| 848 | } |
| 849 | break; |
| 850 | } |
| 851 | case WP_ID_FLOATINFO: |
| 852 | if (size != 4) { |
| 853 | av_log(avctx, AV_LOG_ERROR, |
| 854 | "Invalid FLOATINFO, size = %i\n", size); |
| 855 | bytestream2_skip(&gb, ssize); |
| 856 | continue; |
| 857 | } |
| 858 | s->float_flag = bytestream2_get_byte(&gb); |
| 859 | s->float_shift = bytestream2_get_byte(&gb); |
| 860 | s->float_max_exp = bytestream2_get_byte(&gb); |
| 861 | got_float = 1; |
| 862 | bytestream2_skip(&gb, 1); |
| 863 | break; |
| 864 | case WP_ID_DATA: |
| 865 | s->sc.offset = bytestream2_tell(&gb); |
| 866 | s->sc.size = size * 8; |
| 867 | if ((ret = init_get_bits8(&s->gb, gb.buffer, size)) < 0) |
| 868 | return ret; |
| 869 | s->data_size = size * 8; |
| 870 | bytestream2_skip(&gb, size); |
| 871 | got_bs = 1; |
| 872 | break; |
| 873 | case WP_ID_EXTRABITS: |
| 874 | if (size <= 4) { |
| 875 | av_log(avctx, AV_LOG_ERROR, "Invalid EXTRABITS, size = %i\n", |
| 876 | size); |
| 877 | bytestream2_skip(&gb, size); |
| 878 | continue; |
| 879 | } |
| 880 | s->extra_sc.offset = bytestream2_tell(&gb); |
| 881 | s->extra_sc.size = size * 8; |
| 882 | if ((ret = init_get_bits8(&s->gb_extra_bits, gb.buffer, size)) < 0) |
| 883 | return ret; |
| 884 | s->crc_extra_bits = get_bits_long(&s->gb_extra_bits, 32); |
| 885 | bytestream2_skip(&gb, size); |
| 886 | s->got_extra_bits = 1; |
| 887 | break; |
| 888 | case WP_ID_CHANINFO: |
| 889 | if (size <= 1) { |
| 890 | av_log(avctx, AV_LOG_ERROR, |
| 891 | "Insufficient channel information\n"); |
| 892 | return AVERROR_INVALIDDATA; |
| 893 | } |
| 894 | chan = bytestream2_get_byte(&gb); |
| 895 | switch (size - 2) { |
| 896 | case 0: |
| 897 | chmask = bytestream2_get_byte(&gb); |
| 898 | break; |
| 899 | case 1: |
| 900 | chmask = bytestream2_get_le16(&gb); |
| 901 | break; |
| 902 | case 2: |
| 903 | chmask = bytestream2_get_le24(&gb); |
| 904 | break; |
| 905 | case 3: |
| 906 | chmask = bytestream2_get_le32(&gb); |
| 907 | break; |
| 908 | case 5: |
| 909 | size = bytestream2_get_byte(&gb); |
| 910 | if (avctx->channels != size) |
| 911 | av_log(avctx, AV_LOG_WARNING, "%i channels signalled" |
| 912 | " instead of %i.\n", size, avctx->channels); |
| 913 | chan |= (bytestream2_get_byte(&gb) & 0xF) << 8; |
| 914 | chmask = bytestream2_get_le16(&gb); |
| 915 | break; |
| 916 | default: |
| 917 | av_log(avctx, AV_LOG_ERROR, "Invalid channel info size %d\n", |
| 918 | size); |
| 919 | chan = avctx->channels; |
| 920 | chmask = avctx->channel_layout; |
| 921 | } |
| 922 | break; |
| 923 | case WP_ID_SAMPLE_RATE: |
| 924 | if (size != 3) { |
| 925 | av_log(avctx, AV_LOG_ERROR, "Invalid custom sample rate.\n"); |
| 926 | return AVERROR_INVALIDDATA; |
| 927 | } |
| 928 | sample_rate = bytestream2_get_le24(&gb); |
| 929 | break; |
| 930 | default: |
| 931 | bytestream2_skip(&gb, size); |
| 932 | } |
| 933 | if (id & WP_IDF_ODD) |
| 934 | bytestream2_skip(&gb, 1); |
| 935 | } |
| 936 | |
| 937 | if (!got_terms) { |
| 938 | av_log(avctx, AV_LOG_ERROR, "No block with decorrelation terms\n"); |
| 939 | return AVERROR_INVALIDDATA; |
| 940 | } |
| 941 | if (!got_weights) { |
| 942 | av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n"); |
| 943 | return AVERROR_INVALIDDATA; |
| 944 | } |
| 945 | if (!got_samples) { |
| 946 | av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n"); |
| 947 | return AVERROR_INVALIDDATA; |
| 948 | } |
| 949 | if (!got_entropy) { |
| 950 | av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n"); |
| 951 | return AVERROR_INVALIDDATA; |
| 952 | } |
| 953 | if (s->hybrid && !got_hybrid) { |
| 954 | av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n"); |
| 955 | return AVERROR_INVALIDDATA; |
| 956 | } |
| 957 | if (!got_bs) { |
| 958 | av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n"); |
| 959 | return AVERROR_INVALIDDATA; |
| 960 | } |
| 961 | if (!got_float && avctx->sample_fmt == AV_SAMPLE_FMT_FLTP) { |
| 962 | av_log(avctx, AV_LOG_ERROR, "Float information not found\n"); |
| 963 | return AVERROR_INVALIDDATA; |
| 964 | } |
| 965 | if (s->got_extra_bits && avctx->sample_fmt != AV_SAMPLE_FMT_FLTP) { |
| 966 | const int size = get_bits_left(&s->gb_extra_bits); |
| 967 | const int wanted = s->samples * s->extra_bits << s->stereo_in; |
| 968 | if (size < wanted) { |
| 969 | av_log(avctx, AV_LOG_ERROR, "Too small EXTRABITS\n"); |
| 970 | s->got_extra_bits = 0; |
| 971 | } |
| 972 | } |
| 973 | |
| 974 | if (!wc->ch_offset) { |
| 975 | int sr = (s->frame_flags >> 23) & 0xf; |
| 976 | if (sr == 0xf) { |
| 977 | if (!sample_rate) { |
| 978 | av_log(avctx, AV_LOG_ERROR, "Custom sample rate missing.\n"); |
| 979 | return AVERROR_INVALIDDATA; |
| 980 | } |
| 981 | avctx->sample_rate = sample_rate; |
| 982 | } else |
| 983 | avctx->sample_rate = wv_rates[sr]; |
| 984 | |
| 985 | if (multiblock) { |
| 986 | if (chan) |
| 987 | avctx->channels = chan; |
| 988 | if (chmask) |
| 989 | avctx->channel_layout = chmask; |
| 990 | } else { |
| 991 | avctx->channels = s->stereo ? 2 : 1; |
| 992 | avctx->channel_layout = s->stereo ? AV_CH_LAYOUT_STEREO : |
| 993 | AV_CH_LAYOUT_MONO; |
| 994 | } |
| 995 | |
| 996 | /* get output buffer */ |
| 997 | frame->nb_samples = s->samples + 1; |
| 998 | if ((ret = ff_thread_get_buffer(avctx, &tframe, 0)) < 0) |
| 999 | return ret; |
| 1000 | frame->nb_samples = s->samples; |
| 1001 | } |
| 1002 | |
| 1003 | if (wc->ch_offset + s->stereo >= avctx->channels) { |
| 1004 | av_log(avctx, AV_LOG_WARNING, "Too many channels coded in a packet.\n"); |
| 1005 | return (avctx->err_recognition & AV_EF_EXPLODE) ? AVERROR_INVALIDDATA : 0; |
| 1006 | } |
| 1007 | |
| 1008 | samples_l = frame->extended_data[wc->ch_offset]; |
| 1009 | if (s->stereo) |
| 1010 | samples_r = frame->extended_data[wc->ch_offset + 1]; |
| 1011 | |
| 1012 | wc->ch_offset += 1 + s->stereo; |
| 1013 | |
| 1014 | if (s->stereo_in) { |
| 1015 | ret = wv_unpack_stereo(s, &s->gb, samples_l, samples_r, avctx->sample_fmt); |
| 1016 | if (ret < 0) |
| 1017 | return ret; |
| 1018 | } else { |
| 1019 | ret = wv_unpack_mono(s, &s->gb, samples_l, avctx->sample_fmt); |
| 1020 | if (ret < 0) |
| 1021 | return ret; |
| 1022 | |
| 1023 | if (s->stereo) |
| 1024 | memcpy(samples_r, samples_l, bpp * s->samples); |
| 1025 | } |
| 1026 | |
| 1027 | return 0; |
| 1028 | } |
| 1029 | |
| 1030 | static void wavpack_decode_flush(AVCodecContext *avctx) |
| 1031 | { |
| 1032 | WavpackContext *s = avctx->priv_data; |
| 1033 | int i; |
| 1034 | |
| 1035 | for (i = 0; i < s->fdec_num; i++) |
| 1036 | wv_reset_saved_context(s->fdec[i]); |
| 1037 | } |
| 1038 | |
| 1039 | static int wavpack_decode_frame(AVCodecContext *avctx, void *data, |
| 1040 | int *got_frame_ptr, AVPacket *avpkt) |
| 1041 | { |
| 1042 | WavpackContext *s = avctx->priv_data; |
| 1043 | const uint8_t *buf = avpkt->data; |
| 1044 | int buf_size = avpkt->size; |
| 1045 | AVFrame *frame = data; |
| 1046 | int frame_size, ret, frame_flags; |
| 1047 | |
| 1048 | if (avpkt->size <= WV_HEADER_SIZE) |
| 1049 | return AVERROR_INVALIDDATA; |
| 1050 | |
| 1051 | s->block = 0; |
| 1052 | s->ch_offset = 0; |
| 1053 | |
| 1054 | /* determine number of samples */ |
| 1055 | s->samples = AV_RL32(buf + 20); |
| 1056 | frame_flags = AV_RL32(buf + 24); |
| 1057 | if (s->samples <= 0 || s->samples > WV_MAX_SAMPLES) { |
| 1058 | av_log(avctx, AV_LOG_ERROR, "Invalid number of samples: %d\n", |
| 1059 | s->samples); |
| 1060 | return AVERROR_INVALIDDATA; |
| 1061 | } |
| 1062 | |
| 1063 | if (frame_flags & 0x80) { |
| 1064 | avctx->sample_fmt = AV_SAMPLE_FMT_FLTP; |
| 1065 | } else if ((frame_flags & 0x03) <= 1) { |
| 1066 | avctx->sample_fmt = AV_SAMPLE_FMT_S16P; |
| 1067 | } else { |
| 1068 | avctx->sample_fmt = AV_SAMPLE_FMT_S32P; |
| 1069 | avctx->bits_per_raw_sample = ((frame_flags & 0x03) + 1) << 3; |
| 1070 | } |
| 1071 | |
| 1072 | while (buf_size > 0) { |
| 1073 | if (buf_size <= WV_HEADER_SIZE) |
| 1074 | break; |
| 1075 | frame_size = AV_RL32(buf + 4) - 12; |
| 1076 | buf += 20; |
| 1077 | buf_size -= 20; |
| 1078 | if (frame_size <= 0 || frame_size > buf_size) { |
| 1079 | av_log(avctx, AV_LOG_ERROR, |
| 1080 | "Block %d has invalid size (size %d vs. %d bytes left)\n", |
| 1081 | s->block, frame_size, buf_size); |
| 1082 | wavpack_decode_flush(avctx); |
| 1083 | return AVERROR_INVALIDDATA; |
| 1084 | } |
| 1085 | if ((ret = wavpack_decode_block(avctx, s->block, |
| 1086 | frame, buf, frame_size)) < 0) { |
| 1087 | wavpack_decode_flush(avctx); |
| 1088 | return ret; |
| 1089 | } |
| 1090 | s->block++; |
| 1091 | buf += frame_size; |
| 1092 | buf_size -= frame_size; |
| 1093 | } |
| 1094 | |
| 1095 | if (s->ch_offset != avctx->channels) { |
| 1096 | av_log(avctx, AV_LOG_ERROR, "Not enough channels coded in a packet.\n"); |
| 1097 | return AVERROR_INVALIDDATA; |
| 1098 | } |
| 1099 | |
| 1100 | *got_frame_ptr = 1; |
| 1101 | |
| 1102 | return avpkt->size; |
| 1103 | } |
| 1104 | |
| 1105 | AVCodec ff_wavpack_decoder = { |
| 1106 | .name = "wavpack", |
| 1107 | .long_name = NULL_IF_CONFIG_SMALL("WavPack"), |
| 1108 | .type = AVMEDIA_TYPE_AUDIO, |
| 1109 | .id = AV_CODEC_ID_WAVPACK, |
| 1110 | .priv_data_size = sizeof(WavpackContext), |
| 1111 | .init = wavpack_decode_init, |
| 1112 | .close = wavpack_decode_end, |
| 1113 | .decode = wavpack_decode_frame, |
| 1114 | .flush = wavpack_decode_flush, |
| 1115 | .init_thread_copy = ONLY_IF_THREADS_ENABLED(init_thread_copy), |
| 1116 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_FRAME_THREADS, |
| 1117 | }; |