1/* 2 * WavPack lossless audio decoder 3 * Copyright (c) 2006,2011 Konstantin Shishkov 4 * Copyright (c) 2020 David Bryant 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include "libavutil/buffer.h" 24#include "libavutil/channel_layout.h" 25 26#define BITSTREAM_READER_LE 27#include "avcodec.h" 28#include "bytestream.h" 29#include "codec_internal.h" 30#include "get_bits.h" 31#include "thread.h" 32#include "threadframe.h" 33#include "unary.h" 34#include "wavpack.h" 35#include "dsd.h" 36 37/** 38 * @file 39 * WavPack lossless audio decoder 40 */ 41 42#define DSD_BYTE_READY(low,high) (!(((low) ^ (high)) & 0xff000000)) 43 44#define PTABLE_BITS 8 45#define PTABLE_BINS (1<<PTABLE_BITS) 46#define PTABLE_MASK (PTABLE_BINS-1) 47 48#define UP 0x010000fe 49#define DOWN 0x00010000 50#define DECAY 8 51 52#define PRECISION 20 53#define VALUE_ONE (1 << PRECISION) 54#define PRECISION_USE 12 55 56#define RATE_S 20 57 58#define MAX_HISTORY_BITS 5 59#define MAX_HISTORY_BINS (1 << MAX_HISTORY_BITS) 60#define MAX_BIN_BYTES 1280 // for value_lookup, per bin (2k - 512 - 256) 61 62typedef enum { 63 MODULATION_PCM, // pulse code modulation 64 MODULATION_DSD // pulse density modulation (aka DSD) 65} Modulation; 66 67typedef struct WavpackFrameContext { 68 AVCodecContext *avctx; 69 int frame_flags; 70 int stereo, stereo_in; 71 int joint; 72 uint32_t CRC; 73 GetBitContext gb; 74 int got_extra_bits; 75 uint32_t crc_extra_bits; 76 GetBitContext gb_extra_bits; 77 int samples; 78 int terms; 79 Decorr decorr[MAX_TERMS]; 80 int zero, one, zeroes; 81 int extra_bits; 82 int and, or, shift; 83 int post_shift; 84 int hybrid, hybrid_bitrate; 85 int hybrid_maxclip, hybrid_minclip; 86 int float_flag; 87 int float_shift; 88 int float_max_exp; 89 WvChannel ch[2]; 90 91 GetByteContext gbyte; 92 int ptable [PTABLE_BINS]; 93 uint8_t value_lookup_buffer[MAX_HISTORY_BINS*MAX_BIN_BYTES]; 94 uint16_t summed_probabilities[MAX_HISTORY_BINS][256]; 95 uint8_t probabilities[MAX_HISTORY_BINS][256]; 96 uint8_t *value_lookup[MAX_HISTORY_BINS]; 97} WavpackFrameContext; 98 99#define WV_MAX_FRAME_DECODERS 14 100 101typedef struct WavpackContext { 102 AVCodecContext *avctx; 103 104 WavpackFrameContext *fdec[WV_MAX_FRAME_DECODERS]; 105 int fdec_num; 106 107 int block; 108 int samples; 109 int ch_offset; 110 111 AVFrame *frame; 112 ThreadFrame curr_frame, prev_frame; 113 Modulation modulation; 114 115 AVBufferRef *dsd_ref; 116 DSDContext *dsdctx; 117 int dsd_channels; 118} WavpackContext; 119 120#define LEVEL_DECAY(a) (((a) + 0x80) >> 8) 121 122static av_always_inline unsigned get_tail(GetBitContext *gb, int k) 123{ 124 int p, e, res; 125 126 if (k < 1) 127 return 0; 128 p = av_log2(k); 129 e = (1 << (p + 1)) - k - 1; 130 res = get_bitsz(gb, p); 131 if (res >= e) 132 res = res * 2U - e + get_bits1(gb); 133 return res; 134} 135 136static int update_error_limit(WavpackFrameContext *ctx) 137{ 138 int i, br[2], sl[2]; 139 140 for (i = 0; i <= ctx->stereo_in; i++) { 141 if (ctx->ch[i].bitrate_acc > UINT_MAX - ctx->ch[i].bitrate_delta) 142 return AVERROR_INVALIDDATA; 143 ctx->ch[i].bitrate_acc += ctx->ch[i].bitrate_delta; 144 br[i] = ctx->ch[i].bitrate_acc >> 16; 145 sl[i] = LEVEL_DECAY(ctx->ch[i].slow_level); 146 } 147 if (ctx->stereo_in && ctx->hybrid_bitrate) { 148 int balance = (sl[1] - sl[0] + br[1] + 1) >> 1; 149 if (balance > br[0]) { 150 br[1] = br[0] * 2; 151 br[0] = 0; 152 } else if (-balance > br[0]) { 153 br[0] *= 2; 154 br[1] = 0; 155 } else { 156 br[1] = br[0] + balance; 157 br[0] = br[0] - balance; 158 } 159 } 160 for (i = 0; i <= ctx->stereo_in; i++) { 161 if (ctx->hybrid_bitrate) { 162 if (sl[i] - br[i] > -0x100) 163 ctx->ch[i].error_limit = wp_exp2(sl[i] - br[i] + 0x100); 164 else 165 ctx->ch[i].error_limit = 0; 166 } else { 167 ctx->ch[i].error_limit = wp_exp2(br[i]); 168 } 169 } 170 171 return 0; 172} 173 174static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb, 175 int channel, int *last) 176{ 177 int t, t2; 178 int sign, base, add, ret; 179 WvChannel *c = &ctx->ch[channel]; 180 181 *last = 0; 182 183 if ((ctx->ch[0].median[0] < 2U) && (ctx->ch[1].median[0] < 2U) && 184 !ctx->zero && !ctx->one) { 185 if (ctx->zeroes) { 186 ctx->zeroes--; 187 if (ctx->zeroes) { 188 c->slow_level -= LEVEL_DECAY(c->slow_level); 189 return 0; 190 } 191 } else { 192 t = get_unary_0_33(gb); 193 if (t >= 2) { 194 if (t >= 32 || get_bits_left(gb) < t - 1) 195 goto error; 196 t = get_bits_long(gb, t - 1) | (1 << (t - 1)); 197 } else { 198 if (get_bits_left(gb) < 0) 199 goto error; 200 } 201 ctx->zeroes = t; 202 if (ctx->zeroes) { 203 memset(ctx->ch[0].median, 0, sizeof(ctx->ch[0].median)); 204 memset(ctx->ch[1].median, 0, sizeof(ctx->ch[1].median)); 205 c->slow_level -= LEVEL_DECAY(c->slow_level); 206 return 0; 207 } 208 } 209 } 210 211 if (ctx->zero) { 212 t = 0; 213 ctx->zero = 0; 214 } else { 215 t = get_unary_0_33(gb); 216 if (get_bits_left(gb) < 0) 217 goto error; 218 if (t == 16) { 219 t2 = get_unary_0_33(gb); 220 if (t2 < 2) { 221 if (get_bits_left(gb) < 0) 222 goto error; 223 t += t2; 224 } else { 225 if (t2 >= 32 || get_bits_left(gb) < t2 - 1) 226 goto error; 227 t += get_bits_long(gb, t2 - 1) | (1 << (t2 - 1)); 228 } 229 } 230 231 if (ctx->one) { 232 ctx->one = t & 1; 233 t = (t >> 1) + 1; 234 } else { 235 ctx->one = t & 1; 236 t >>= 1; 237 } 238 ctx->zero = !ctx->one; 239 } 240 241 if (ctx->hybrid && !channel) { 242 if (update_error_limit(ctx) < 0) 243 goto error; 244 } 245 246 if (!t) { 247 base = 0; 248 add = GET_MED(0) - 1; 249 DEC_MED(0); 250 } else if (t == 1) { 251 base = GET_MED(0); 252 add = GET_MED(1) - 1; 253 INC_MED(0); 254 DEC_MED(1); 255 } else if (t == 2) { 256 base = GET_MED(0) + GET_MED(1); 257 add = GET_MED(2) - 1; 258 INC_MED(0); 259 INC_MED(1); 260 DEC_MED(2); 261 } else { 262 base = GET_MED(0) + GET_MED(1) + GET_MED(2) * (t - 2U); 263 add = GET_MED(2) - 1; 264 INC_MED(0); 265 INC_MED(1); 266 INC_MED(2); 267 } 268 if (!c->error_limit) { 269 if (add >= 0x2000000U) { 270 av_log(ctx->avctx, AV_LOG_ERROR, "k %d is too large\n", add); 271 goto error; 272 } 273 ret = base + get_tail(gb, add); 274 if (get_bits_left(gb) <= 0) 275 goto error; 276 } else { 277 int mid = (base * 2U + add + 1) >> 1; 278 while (add > c->error_limit) { 279 if (get_bits_left(gb) <= 0) 280 goto error; 281 if (get_bits1(gb)) { 282 add -= (mid - (unsigned)base); 283 base = mid; 284 } else 285 add = mid - (unsigned)base - 1; 286 mid = (base * 2U + add + 1) >> 1; 287 } 288 ret = mid; 289 } 290 sign = get_bits1(gb); 291 if (ctx->hybrid_bitrate) 292 c->slow_level += wp_log2(ret) - LEVEL_DECAY(c->slow_level); 293 return sign ? ~ret : ret; 294 295error: 296 ret = get_bits_left(gb); 297 if (ret <= 0) { 298 av_log(ctx->avctx, AV_LOG_ERROR, "Too few bits (%d) left\n", ret); 299 } 300 *last = 1; 301 return 0; 302} 303 304static inline int wv_get_value_integer(WavpackFrameContext *s, uint32_t *crc, 305 unsigned S) 306{ 307 unsigned bit; 308 309 if (s->extra_bits) { 310 S *= 1 << s->extra_bits; 311 312 if (s->got_extra_bits && 313 get_bits_left(&s->gb_extra_bits) >= s->extra_bits) { 314 S |= get_bits_long(&s->gb_extra_bits, s->extra_bits); 315 *crc = *crc * 9 + (S & 0xffff) * 3 + ((unsigned)S >> 16); 316 } 317 } 318 319 bit = (S & s->and) | s->or; 320 bit = ((S + bit) << s->shift) - bit; 321 322 if (s->hybrid) 323 bit = av_clip(bit, s->hybrid_minclip, s->hybrid_maxclip); 324 325 return bit << s->post_shift; 326} 327 328static float wv_get_value_float(WavpackFrameContext *s, uint32_t *crc, int S) 329{ 330 union { 331 float f; 332 uint32_t u; 333 } value; 334 335 unsigned int sign; 336 int exp = s->float_max_exp; 337 338 if (s->got_extra_bits) { 339 const int max_bits = 1 + 23 + 8 + 1; 340 const int left_bits = get_bits_left(&s->gb_extra_bits); 341 342 if (left_bits + 8 * AV_INPUT_BUFFER_PADDING_SIZE < max_bits) 343 return 0.0; 344 } 345 346 if (S) { 347 S *= 1U << s->float_shift; 348 sign = S < 0; 349 if (sign) 350 S = -(unsigned)S; 351 if (S >= 0x1000000U) { 352 if (s->got_extra_bits && get_bits1(&s->gb_extra_bits)) 353 S = get_bits(&s->gb_extra_bits, 23); 354 else 355 S = 0; 356 exp = 255; 357 } else if (exp) { 358 int shift = 23 - av_log2(S); 359 exp = s->float_max_exp; 360 if (exp <= shift) 361 shift = --exp; 362 exp -= shift; 363 364 if (shift) { 365 S <<= shift; 366 if ((s->float_flag & WV_FLT_SHIFT_ONES) || 367 (s->got_extra_bits && 368 (s->float_flag & WV_FLT_SHIFT_SAME) && 369 get_bits1(&s->gb_extra_bits))) { 370 S |= (1 << shift) - 1; 371 } else if (s->got_extra_bits && 372 (s->float_flag & WV_FLT_SHIFT_SENT)) { 373 S |= get_bits(&s->gb_extra_bits, shift); 374 } 375 } 376 } else { 377 exp = s->float_max_exp; 378 } 379 S &= 0x7fffff; 380 } else { 381 sign = 0; 382 exp = 0; 383 if (s->got_extra_bits && (s->float_flag & WV_FLT_ZERO_SENT)) { 384 if (get_bits1(&s->gb_extra_bits)) { 385 S = get_bits(&s->gb_extra_bits, 23); 386 if (s->float_max_exp >= 25) 387 exp = get_bits(&s->gb_extra_bits, 8); 388 sign = get_bits1(&s->gb_extra_bits); 389 } else { 390 if (s->float_flag & WV_FLT_ZERO_SIGN) 391 sign = get_bits1(&s->gb_extra_bits); 392 } 393 } 394 } 395 396 *crc = *crc * 27 + S * 9 + exp * 3 + sign; 397 398 value.u = (sign << 31) | (exp << 23) | S; 399 return value.f; 400} 401 402static inline int wv_check_crc(WavpackFrameContext *s, uint32_t crc, 403 uint32_t crc_extra_bits) 404{ 405 if (crc != s->CRC) { 406 av_log(s->avctx, AV_LOG_ERROR, "CRC error\n"); 407 return AVERROR_INVALIDDATA; 408 } 409 if (s->got_extra_bits && crc_extra_bits != s->crc_extra_bits) { 410 av_log(s->avctx, AV_LOG_ERROR, "Extra bits CRC error\n"); 411 return AVERROR_INVALIDDATA; 412 } 413 414 return 0; 415} 416 417static void init_ptable(int *table, int rate_i, int rate_s) 418{ 419 int value = 0x808000, rate = rate_i << 8; 420 421 for (int c = (rate + 128) >> 8; c--;) 422 value += (DOWN - value) >> DECAY; 423 424 for (int i = 0; i < PTABLE_BINS/2; i++) { 425 table[i] = value; 426 table[PTABLE_BINS-1-i] = 0x100ffff - value; 427 428 if (value > 0x010000) { 429 rate += (rate * rate_s + 128) >> 8; 430 431 for (int c = (rate + 64) >> 7; c--;) 432 value += (DOWN - value) >> DECAY; 433 } 434 } 435} 436 437typedef struct { 438 int32_t value, fltr0, fltr1, fltr2, fltr3, fltr4, fltr5, fltr6, factor; 439 unsigned int byte; 440} DSDfilters; 441 442static int wv_unpack_dsd_high(WavpackFrameContext *s, uint8_t *dst_left, uint8_t *dst_right) 443{ 444 uint32_t checksum = 0xFFFFFFFF; 445 uint8_t *dst_l = dst_left, *dst_r = dst_right; 446 int total_samples = s->samples, stereo = dst_r ? 1 : 0; 447 DSDfilters filters[2], *sp = filters; 448 int rate_i, rate_s; 449 uint32_t low, high, value; 450 451 if (bytestream2_get_bytes_left(&s->gbyte) < (stereo ? 20 : 13)) 452 return AVERROR_INVALIDDATA; 453 454 rate_i = bytestream2_get_byte(&s->gbyte); 455 rate_s = bytestream2_get_byte(&s->gbyte); 456 457 if (rate_s != RATE_S) 458 return AVERROR_INVALIDDATA; 459 460 init_ptable(s->ptable, rate_i, rate_s); 461 462 for (int channel = 0; channel < stereo + 1; channel++) { 463 DSDfilters *sp = filters + channel; 464 465 sp->fltr1 = bytestream2_get_byte(&s->gbyte) << (PRECISION - 8); 466 sp->fltr2 = bytestream2_get_byte(&s->gbyte) << (PRECISION - 8); 467 sp->fltr3 = bytestream2_get_byte(&s->gbyte) << (PRECISION - 8); 468 sp->fltr4 = bytestream2_get_byte(&s->gbyte) << (PRECISION - 8); 469 sp->fltr5 = bytestream2_get_byte(&s->gbyte) << (PRECISION - 8); 470 sp->fltr6 = 0; 471 sp->factor = bytestream2_get_byte(&s->gbyte) & 0xff; 472 sp->factor |= (bytestream2_get_byte(&s->gbyte) << 8) & 0xff00; 473 sp->factor = (int32_t)((uint32_t)sp->factor << 16) >> 16; 474 } 475 476 value = bytestream2_get_be32(&s->gbyte); 477 high = 0xffffffff; 478 low = 0x0; 479 480 while (total_samples--) { 481 int bitcount = 8; 482 483 sp[0].value = sp[0].fltr1 - sp[0].fltr5 + ((sp[0].fltr6 * sp[0].factor) >> 2); 484 485 if (stereo) 486 sp[1].value = sp[1].fltr1 - sp[1].fltr5 + ((sp[1].fltr6 * sp[1].factor) >> 2); 487 488 while (bitcount--) { 489 int32_t *pp = s->ptable + ((sp[0].value >> (PRECISION - PRECISION_USE)) & PTABLE_MASK); 490 uint32_t split = low + ((high - low) >> 8) * (*pp >> 16); 491 492 if (value <= split) { 493 high = split; 494 *pp += (UP - *pp) >> DECAY; 495 sp[0].fltr0 = -1; 496 } else { 497 low = split + 1; 498 *pp += (DOWN - *pp) >> DECAY; 499 sp[0].fltr0 = 0; 500 } 501 502 if (DSD_BYTE_READY(high, low) && !bytestream2_get_bytes_left(&s->gbyte)) 503 return AVERROR_INVALIDDATA; 504 while (DSD_BYTE_READY(high, low) && bytestream2_get_bytes_left(&s->gbyte)) { 505 value = (value << 8) | bytestream2_get_byte(&s->gbyte); 506 high = (high << 8) | 0xff; 507 low <<= 8; 508 } 509 510 sp[0].value += sp[0].fltr6 * 8; 511 sp[0].byte = (sp[0].byte << 1) | (sp[0].fltr0 & 1); 512 sp[0].factor += (((sp[0].value ^ sp[0].fltr0) >> 31) | 1) & 513 ((sp[0].value ^ (sp[0].value - (sp[0].fltr6 * 16))) >> 31); 514 sp[0].fltr1 += ((sp[0].fltr0 & VALUE_ONE) - sp[0].fltr1) >> 6; 515 sp[0].fltr2 += ((sp[0].fltr0 & VALUE_ONE) - sp[0].fltr2) >> 4; 516 sp[0].fltr3 += (sp[0].fltr2 - sp[0].fltr3) >> 4; 517 sp[0].fltr4 += (sp[0].fltr3 - sp[0].fltr4) >> 4; 518 sp[0].value = (sp[0].fltr4 - sp[0].fltr5) >> 4; 519 sp[0].fltr5 += sp[0].value; 520 sp[0].fltr6 += (sp[0].value - sp[0].fltr6) >> 3; 521 sp[0].value = sp[0].fltr1 - sp[0].fltr5 + ((sp[0].fltr6 * sp[0].factor) >> 2); 522 523 if (!stereo) 524 continue; 525 526 pp = s->ptable + ((sp[1].value >> (PRECISION - PRECISION_USE)) & PTABLE_MASK); 527 split = low + ((high - low) >> 8) * (*pp >> 16); 528 529 if (value <= split) { 530 high = split; 531 *pp += (UP - *pp) >> DECAY; 532 sp[1].fltr0 = -1; 533 } else { 534 low = split + 1; 535 *pp += (DOWN - *pp) >> DECAY; 536 sp[1].fltr0 = 0; 537 } 538 539 if (DSD_BYTE_READY(high, low) && !bytestream2_get_bytes_left(&s->gbyte)) 540 return AVERROR_INVALIDDATA; 541 while (DSD_BYTE_READY(high, low) && bytestream2_get_bytes_left(&s->gbyte)) { 542 value = (value << 8) | bytestream2_get_byte(&s->gbyte); 543 high = (high << 8) | 0xff; 544 low <<= 8; 545 } 546 547 sp[1].value += sp[1].fltr6 * 8; 548 sp[1].byte = (sp[1].byte << 1) | (sp[1].fltr0 & 1); 549 sp[1].factor += (((sp[1].value ^ sp[1].fltr0) >> 31) | 1) & 550 ((sp[1].value ^ (sp[1].value - (sp[1].fltr6 * 16))) >> 31); 551 sp[1].fltr1 += ((sp[1].fltr0 & VALUE_ONE) - sp[1].fltr1) >> 6; 552 sp[1].fltr2 += ((sp[1].fltr0 & VALUE_ONE) - sp[1].fltr2) >> 4; 553 sp[1].fltr3 += (sp[1].fltr2 - sp[1].fltr3) >> 4; 554 sp[1].fltr4 += (sp[1].fltr3 - sp[1].fltr4) >> 4; 555 sp[1].value = (sp[1].fltr4 - sp[1].fltr5) >> 4; 556 sp[1].fltr5 += sp[1].value; 557 sp[1].fltr6 += (sp[1].value - sp[1].fltr6) >> 3; 558 sp[1].value = sp[1].fltr1 - sp[1].fltr5 + ((sp[1].fltr6 * sp[1].factor) >> 2); 559 } 560 561 checksum += (checksum << 1) + (*dst_l = sp[0].byte & 0xff); 562 sp[0].factor -= (sp[0].factor + 512) >> 10; 563 dst_l += 4; 564 565 if (stereo) { 566 checksum += (checksum << 1) + (*dst_r = filters[1].byte & 0xff); 567 filters[1].factor -= (filters[1].factor + 512) >> 10; 568 dst_r += 4; 569 } 570 } 571 572 if (wv_check_crc(s, checksum, 0)) { 573 if (s->avctx->err_recognition & AV_EF_CRCCHECK) 574 return AVERROR_INVALIDDATA; 575 576 memset(dst_left, 0x69, s->samples * 4); 577 578 if (dst_r) 579 memset(dst_right, 0x69, s->samples * 4); 580 } 581 582 return 0; 583} 584 585static int wv_unpack_dsd_fast(WavpackFrameContext *s, uint8_t *dst_left, uint8_t *dst_right) 586{ 587 uint8_t *dst_l = dst_left, *dst_r = dst_right; 588 uint8_t history_bits, max_probability; 589 int total_summed_probabilities = 0; 590 int total_samples = s->samples; 591 uint8_t *vlb = s->value_lookup_buffer; 592 int history_bins, p0, p1, chan; 593 uint32_t checksum = 0xFFFFFFFF; 594 uint32_t low, high, value; 595 596 if (!bytestream2_get_bytes_left(&s->gbyte)) 597 return AVERROR_INVALIDDATA; 598 599 history_bits = bytestream2_get_byte(&s->gbyte); 600 601 if (!bytestream2_get_bytes_left(&s->gbyte) || history_bits > MAX_HISTORY_BITS) 602 return AVERROR_INVALIDDATA; 603 604 history_bins = 1 << history_bits; 605 max_probability = bytestream2_get_byte(&s->gbyte); 606 607 if (max_probability < 0xff) { 608 uint8_t *outptr = (uint8_t *)s->probabilities; 609 uint8_t *outend = outptr + sizeof(*s->probabilities) * history_bins; 610 611 while (outptr < outend && bytestream2_get_bytes_left(&s->gbyte)) { 612 int code = bytestream2_get_byte(&s->gbyte); 613 614 if (code > max_probability) { 615 int zcount = code - max_probability; 616 617 while (outptr < outend && zcount--) 618 *outptr++ = 0; 619 } else if (code) { 620 *outptr++ = code; 621 } 622 else { 623 break; 624 } 625 } 626 627 if (outptr < outend || 628 (bytestream2_get_bytes_left(&s->gbyte) && bytestream2_get_byte(&s->gbyte))) 629 return AVERROR_INVALIDDATA; 630 } else if (bytestream2_get_bytes_left(&s->gbyte) > (int)sizeof(*s->probabilities) * history_bins) { 631 bytestream2_get_buffer(&s->gbyte, (uint8_t *)s->probabilities, 632 sizeof(*s->probabilities) * history_bins); 633 } else { 634 return AVERROR_INVALIDDATA; 635 } 636 637 for (p0 = 0; p0 < history_bins; p0++) { 638 int32_t sum_values = 0; 639 640 for (int i = 0; i < 256; i++) 641 s->summed_probabilities[p0][i] = sum_values += s->probabilities[p0][i]; 642 643 if (sum_values) { 644 total_summed_probabilities += sum_values; 645 646 if (total_summed_probabilities > history_bins * MAX_BIN_BYTES) 647 return AVERROR_INVALIDDATA; 648 649 s->value_lookup[p0] = vlb; 650 651 for (int i = 0; i < 256; i++) { 652 int c = s->probabilities[p0][i]; 653 654 while (c--) 655 *vlb++ = i; 656 } 657 } 658 } 659 660 if (bytestream2_get_bytes_left(&s->gbyte) < 4) 661 return AVERROR_INVALIDDATA; 662 663 chan = p0 = p1 = 0; 664 low = 0; high = 0xffffffff; 665 value = bytestream2_get_be32(&s->gbyte); 666 667 if (dst_r) 668 total_samples *= 2; 669 670 while (total_samples--) { 671 unsigned int mult, index, code; 672 673 if (!s->summed_probabilities[p0][255]) 674 return AVERROR_INVALIDDATA; 675 676 mult = (high - low) / s->summed_probabilities[p0][255]; 677 678 if (!mult) { 679 if (bytestream2_get_bytes_left(&s->gbyte) >= 4) 680 value = bytestream2_get_be32(&s->gbyte); 681 682 low = 0; 683 high = 0xffffffff; 684 mult = high / s->summed_probabilities[p0][255]; 685 686 if (!mult) 687 return AVERROR_INVALIDDATA; 688 } 689 690 index = (value - low) / mult; 691 692 if (index >= s->summed_probabilities[p0][255]) 693 return AVERROR_INVALIDDATA; 694 695 if (!dst_r) { 696 if ((*dst_l = code = s->value_lookup[p0][index])) 697 low += s->summed_probabilities[p0][code-1] * mult; 698 699 dst_l += 4; 700 } else { 701 if ((code = s->value_lookup[p0][index])) 702 low += s->summed_probabilities[p0][code-1] * mult; 703 704 if (chan) { 705 *dst_r = code; 706 dst_r += 4; 707 } 708 else { 709 *dst_l = code; 710 dst_l += 4; 711 } 712 713 chan ^= 1; 714 } 715 716 high = low + s->probabilities[p0][code] * mult - 1; 717 checksum += (checksum << 1) + code; 718 719 if (!dst_r) { 720 p0 = code & (history_bins-1); 721 } else { 722 p0 = p1; 723 p1 = code & (history_bins-1); 724 } 725 726 while (DSD_BYTE_READY(high, low) && bytestream2_get_bytes_left(&s->gbyte)) { 727 value = (value << 8) | bytestream2_get_byte(&s->gbyte); 728 high = (high << 8) | 0xff; 729 low <<= 8; 730 } 731 } 732 733 if (wv_check_crc(s, checksum, 0)) { 734 if (s->avctx->err_recognition & AV_EF_CRCCHECK) 735 return AVERROR_INVALIDDATA; 736 737 memset(dst_left, 0x69, s->samples * 4); 738 739 if (dst_r) 740 memset(dst_right, 0x69, s->samples * 4); 741 } 742 743 return 0; 744} 745 746static int wv_unpack_dsd_copy(WavpackFrameContext *s, uint8_t *dst_left, uint8_t *dst_right) 747{ 748 uint8_t *dst_l = dst_left, *dst_r = dst_right; 749 int total_samples = s->samples; 750 uint32_t checksum = 0xFFFFFFFF; 751 752 if (bytestream2_get_bytes_left(&s->gbyte) != total_samples * (dst_r ? 2 : 1)) 753 return AVERROR_INVALIDDATA; 754 755 while (total_samples--) { 756 checksum += (checksum << 1) + (*dst_l = bytestream2_get_byte(&s->gbyte)); 757 dst_l += 4; 758 759 if (dst_r) { 760 checksum += (checksum << 1) + (*dst_r = bytestream2_get_byte(&s->gbyte)); 761 dst_r += 4; 762 } 763 } 764 765 if (wv_check_crc(s, checksum, 0)) { 766 if (s->avctx->err_recognition & AV_EF_CRCCHECK) 767 return AVERROR_INVALIDDATA; 768 769 memset(dst_left, 0x69, s->samples * 4); 770 771 if (dst_r) 772 memset(dst_right, 0x69, s->samples * 4); 773 } 774 775 return 0; 776} 777 778static inline int wv_unpack_stereo(WavpackFrameContext *s, GetBitContext *gb, 779 void *dst_l, void *dst_r, const int type) 780{ 781 int i, j, count = 0; 782 int last, t; 783 int A, B, L, L2, R, R2; 784 int pos = 0; 785 uint32_t crc = 0xFFFFFFFF; 786 uint32_t crc_extra_bits = 0xFFFFFFFF; 787 int16_t *dst16_l = dst_l; 788 int16_t *dst16_r = dst_r; 789 int32_t *dst32_l = dst_l; 790 int32_t *dst32_r = dst_r; 791 float *dstfl_l = dst_l; 792 float *dstfl_r = dst_r; 793 794 s->one = s->zero = s->zeroes = 0; 795 do { 796 L = wv_get_value(s, gb, 0, &last); 797 if (last) 798 break; 799 R = wv_get_value(s, gb, 1, &last); 800 if (last) 801 break; 802 for (i = 0; i < s->terms; i++) { 803 t = s->decorr[i].value; 804 if (t > 0) { 805 if (t > 8) { 806 if (t & 1) { 807 A = 2U * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; 808 B = 2U * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]; 809 } else { 810 A = (int)(3U * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; 811 B = (int)(3U * s->decorr[i].samplesB[0] - s->decorr[i].samplesB[1]) >> 1; 812 } 813 s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; 814 s->decorr[i].samplesB[1] = s->decorr[i].samplesB[0]; 815 j = 0; 816 } else { 817 A = s->decorr[i].samplesA[pos]; 818 B = s->decorr[i].samplesB[pos]; 819 j = (pos + t) & 7; 820 } 821 if (type != AV_SAMPLE_FMT_S16P) { 822 L2 = L + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); 823 R2 = R + ((s->decorr[i].weightB * (int64_t)B + 512) >> 10); 824 } else { 825 L2 = L + (unsigned)((int)(s->decorr[i].weightA * (unsigned)A + 512) >> 10); 826 R2 = R + (unsigned)((int)(s->decorr[i].weightB * (unsigned)B + 512) >> 10); 827 } 828 if (A && L) 829 s->decorr[i].weightA -= ((((L ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; 830 if (B && R) 831 s->decorr[i].weightB -= ((((R ^ B) >> 30) & 2) - 1) * s->decorr[i].delta; 832 s->decorr[i].samplesA[j] = L = L2; 833 s->decorr[i].samplesB[j] = R = R2; 834 } else if (t == -1) { 835 if (type != AV_SAMPLE_FMT_S16P) 836 L2 = L + ((s->decorr[i].weightA * (int64_t)s->decorr[i].samplesA[0] + 512) >> 10); 837 else 838 L2 = L + (unsigned)((int)(s->decorr[i].weightA * (unsigned)s->decorr[i].samplesA[0] + 512) >> 10); 839 UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, s->decorr[i].samplesA[0], L); 840 L = L2; 841 if (type != AV_SAMPLE_FMT_S16P) 842 R2 = R + ((s->decorr[i].weightB * (int64_t)L2 + 512) >> 10); 843 else 844 R2 = R + (unsigned)((int)(s->decorr[i].weightB * (unsigned)L2 + 512) >> 10); 845 UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, L2, R); 846 R = R2; 847 s->decorr[i].samplesA[0] = R; 848 } else { 849 if (type != AV_SAMPLE_FMT_S16P) 850 R2 = R + ((s->decorr[i].weightB * (int64_t)s->decorr[i].samplesB[0] + 512) >> 10); 851 else 852 R2 = R + (unsigned)((int)(s->decorr[i].weightB * (unsigned)s->decorr[i].samplesB[0] + 512) >> 10); 853 UPDATE_WEIGHT_CLIP(s->decorr[i].weightB, s->decorr[i].delta, s->decorr[i].samplesB[0], R); 854 R = R2; 855 856 if (t == -3) { 857 R2 = s->decorr[i].samplesA[0]; 858 s->decorr[i].samplesA[0] = R; 859 } 860 861 if (type != AV_SAMPLE_FMT_S16P) 862 L2 = L + ((s->decorr[i].weightA * (int64_t)R2 + 512) >> 10); 863 else 864 L2 = L + (unsigned)((int)(s->decorr[i].weightA * (unsigned)R2 + 512) >> 10); 865 UPDATE_WEIGHT_CLIP(s->decorr[i].weightA, s->decorr[i].delta, R2, L); 866 L = L2; 867 s->decorr[i].samplesB[0] = L; 868 } 869 } 870 871 if (type == AV_SAMPLE_FMT_S16P) { 872 if (FFABS((int64_t)L) + FFABS((int64_t)R) > (1<<19)) { 873 av_log(s->avctx, AV_LOG_ERROR, "sample %d %d too large\n", L, R); 874 return AVERROR_INVALIDDATA; 875 } 876 } 877 878 pos = (pos + 1) & 7; 879 if (s->joint) 880 L += (unsigned)(R -= (unsigned)(L >> 1)); 881 crc = (crc * 3 + L) * 3 + R; 882 883 if (type == AV_SAMPLE_FMT_FLTP) { 884 *dstfl_l++ = wv_get_value_float(s, &crc_extra_bits, L); 885 *dstfl_r++ = wv_get_value_float(s, &crc_extra_bits, R); 886 } else if (type == AV_SAMPLE_FMT_S32P) { 887 *dst32_l++ = wv_get_value_integer(s, &crc_extra_bits, L); 888 *dst32_r++ = wv_get_value_integer(s, &crc_extra_bits, R); 889 } else { 890 *dst16_l++ = wv_get_value_integer(s, &crc_extra_bits, L); 891 *dst16_r++ = wv_get_value_integer(s, &crc_extra_bits, R); 892 } 893 count++; 894 } while (!last && count < s->samples); 895 896 if (last && count < s->samples) { 897 int size = av_get_bytes_per_sample(type); 898 memset((uint8_t*)dst_l + count*size, 0, (s->samples-count)*size); 899 memset((uint8_t*)dst_r + count*size, 0, (s->samples-count)*size); 900 } 901 902 if ((s->avctx->err_recognition & AV_EF_CRCCHECK) && 903 wv_check_crc(s, crc, crc_extra_bits)) 904 return AVERROR_INVALIDDATA; 905 906 return 0; 907} 908 909static inline int wv_unpack_mono(WavpackFrameContext *s, GetBitContext *gb, 910 void *dst, const int type) 911{ 912 int i, j, count = 0; 913 int last, t; 914 int A, S, T; 915 int pos = 0; 916 uint32_t crc = 0xFFFFFFFF; 917 uint32_t crc_extra_bits = 0xFFFFFFFF; 918 int16_t *dst16 = dst; 919 int32_t *dst32 = dst; 920 float *dstfl = dst; 921 922 s->one = s->zero = s->zeroes = 0; 923 do { 924 T = wv_get_value(s, gb, 0, &last); 925 S = 0; 926 if (last) 927 break; 928 for (i = 0; i < s->terms; i++) { 929 t = s->decorr[i].value; 930 if (t > 8) { 931 if (t & 1) 932 A = 2U * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]; 933 else 934 A = (int)(3U * s->decorr[i].samplesA[0] - s->decorr[i].samplesA[1]) >> 1; 935 s->decorr[i].samplesA[1] = s->decorr[i].samplesA[0]; 936 j = 0; 937 } else { 938 A = s->decorr[i].samplesA[pos]; 939 j = (pos + t) & 7; 940 } 941 if (type != AV_SAMPLE_FMT_S16P) 942 S = T + ((s->decorr[i].weightA * (int64_t)A + 512) >> 10); 943 else 944 S = T + (unsigned)((int)(s->decorr[i].weightA * (unsigned)A + 512) >> 10); 945 if (A && T) 946 s->decorr[i].weightA -= ((((T ^ A) >> 30) & 2) - 1) * s->decorr[i].delta; 947 s->decorr[i].samplesA[j] = T = S; 948 } 949 pos = (pos + 1) & 7; 950 crc = crc * 3 + S; 951 952 if (type == AV_SAMPLE_FMT_FLTP) { 953 *dstfl++ = wv_get_value_float(s, &crc_extra_bits, S); 954 } else if (type == AV_SAMPLE_FMT_S32P) { 955 *dst32++ = wv_get_value_integer(s, &crc_extra_bits, S); 956 } else { 957 *dst16++ = wv_get_value_integer(s, &crc_extra_bits, S); 958 } 959 count++; 960 } while (!last && count < s->samples); 961 962 if (last && count < s->samples) { 963 int size = av_get_bytes_per_sample(type); 964 memset((uint8_t*)dst + count*size, 0, (s->samples-count)*size); 965 } 966 967 if (s->avctx->err_recognition & AV_EF_CRCCHECK) { 968 int ret = wv_check_crc(s, crc, crc_extra_bits); 969 if (ret < 0 && s->avctx->err_recognition & AV_EF_EXPLODE) 970 return ret; 971 } 972 973 return 0; 974} 975 976static av_cold int wv_alloc_frame_context(WavpackContext *c) 977{ 978 if (c->fdec_num == WV_MAX_FRAME_DECODERS) 979 return -1; 980 981 c->fdec[c->fdec_num] = av_mallocz(sizeof(**c->fdec)); 982 if (!c->fdec[c->fdec_num]) 983 return -1; 984 c->fdec_num++; 985 c->fdec[c->fdec_num - 1]->avctx = c->avctx; 986 987 return 0; 988} 989 990static int wv_dsd_reset(WavpackContext *s, int channels) 991{ 992 int i; 993 994 s->dsdctx = NULL; 995 s->dsd_channels = 0; 996 av_buffer_unref(&s->dsd_ref); 997 998 if (!channels) 999 return 0; 1000 1001 if (channels > INT_MAX / sizeof(*s->dsdctx)) 1002 return AVERROR(EINVAL); 1003 1004 s->dsd_ref = av_buffer_allocz(channels * sizeof(*s->dsdctx)); 1005 if (!s->dsd_ref) 1006 return AVERROR(ENOMEM); 1007 s->dsdctx = (DSDContext*)s->dsd_ref->data; 1008 s->dsd_channels = channels; 1009 1010 for (i = 0; i < channels; i++) 1011 memset(s->dsdctx[i].buf, 0x69, sizeof(s->dsdctx[i].buf)); 1012 1013 return 0; 1014} 1015 1016#if HAVE_THREADS 1017static int update_thread_context(AVCodecContext *dst, const AVCodecContext *src) 1018{ 1019 WavpackContext *fsrc = src->priv_data; 1020 WavpackContext *fdst = dst->priv_data; 1021 int ret; 1022 1023 if (dst == src) 1024 return 0; 1025 1026 ff_thread_release_ext_buffer(dst, &fdst->curr_frame); 1027 if (fsrc->curr_frame.f->data[0]) { 1028 if ((ret = ff_thread_ref_frame(&fdst->curr_frame, &fsrc->curr_frame)) < 0) 1029 return ret; 1030 } 1031 1032 fdst->dsdctx = NULL; 1033 fdst->dsd_channels = 0; 1034 ret = av_buffer_replace(&fdst->dsd_ref, fsrc->dsd_ref); 1035 if (ret < 0) 1036 return ret; 1037 if (fsrc->dsd_ref) { 1038 fdst->dsdctx = (DSDContext*)fdst->dsd_ref->data; 1039 fdst->dsd_channels = fsrc->dsd_channels; 1040 } 1041 1042 return 0; 1043} 1044#endif 1045 1046static av_cold int wavpack_decode_init(AVCodecContext *avctx) 1047{ 1048 WavpackContext *s = avctx->priv_data; 1049 1050 s->avctx = avctx; 1051 1052 s->fdec_num = 0; 1053 1054 s->curr_frame.f = av_frame_alloc(); 1055 s->prev_frame.f = av_frame_alloc(); 1056 1057 if (!s->curr_frame.f || !s->prev_frame.f) 1058 return AVERROR(ENOMEM); 1059 1060 ff_init_dsd_data(); 1061 1062 return 0; 1063} 1064 1065static av_cold int wavpack_decode_end(AVCodecContext *avctx) 1066{ 1067 WavpackContext *s = avctx->priv_data; 1068 1069 for (int i = 0; i < s->fdec_num; i++) 1070 av_freep(&s->fdec[i]); 1071 s->fdec_num = 0; 1072 1073 ff_thread_release_ext_buffer(avctx, &s->curr_frame); 1074 av_frame_free(&s->curr_frame.f); 1075 1076 ff_thread_release_ext_buffer(avctx, &s->prev_frame); 1077 av_frame_free(&s->prev_frame.f); 1078 1079 av_buffer_unref(&s->dsd_ref); 1080 1081 return 0; 1082} 1083 1084static int wavpack_decode_block(AVCodecContext *avctx, int block_no, 1085 const uint8_t *buf, int buf_size) 1086{ 1087 WavpackContext *wc = avctx->priv_data; 1088 WavpackFrameContext *s; 1089 GetByteContext gb; 1090 enum AVSampleFormat sample_fmt; 1091 void *samples_l = NULL, *samples_r = NULL; 1092 int ret; 1093 int got_terms = 0, got_weights = 0, got_samples = 0, 1094 got_entropy = 0, got_pcm = 0, got_float = 0, got_hybrid = 0; 1095 int got_dsd = 0; 1096 int i, j, id, size, ssize, weights, t; 1097 int bpp, chan = 0, orig_bpp, sample_rate = 0, rate_x = 1, dsd_mode = 0; 1098 int multiblock; 1099 uint64_t chmask = 0; 1100 1101 if (block_no >= wc->fdec_num && wv_alloc_frame_context(wc) < 0) { 1102 av_log(avctx, AV_LOG_ERROR, "Error creating frame decode context\n"); 1103 return AVERROR_INVALIDDATA; 1104 } 1105 1106 s = wc->fdec[block_no]; 1107 if (!s) { 1108 av_log(avctx, AV_LOG_ERROR, "Context for block %d is not present\n", 1109 block_no); 1110 return AVERROR_INVALIDDATA; 1111 } 1112 1113 memset(s->decorr, 0, MAX_TERMS * sizeof(Decorr)); 1114 memset(s->ch, 0, sizeof(s->ch)); 1115 s->extra_bits = 0; 1116 s->and = s->or = s->shift = 0; 1117 s->got_extra_bits = 0; 1118 1119 bytestream2_init(&gb, buf, buf_size); 1120 1121 s->samples = bytestream2_get_le32(&gb); 1122 if (s->samples != wc->samples) { 1123 av_log(avctx, AV_LOG_ERROR, "Mismatching number of samples in " 1124 "a sequence: %d and %d\n", wc->samples, s->samples); 1125 return AVERROR_INVALIDDATA; 1126 } 1127 s->frame_flags = bytestream2_get_le32(&gb); 1128 1129 if (s->frame_flags & (WV_FLOAT_DATA | WV_DSD_DATA)) 1130 sample_fmt = AV_SAMPLE_FMT_FLTP; 1131 else if ((s->frame_flags & 0x03) <= 1) 1132 sample_fmt = AV_SAMPLE_FMT_S16P; 1133 else 1134 sample_fmt = AV_SAMPLE_FMT_S32P; 1135 1136 if (wc->ch_offset && avctx->sample_fmt != sample_fmt) 1137 return AVERROR_INVALIDDATA; 1138 1139 bpp = av_get_bytes_per_sample(sample_fmt); 1140 orig_bpp = ((s->frame_flags & 0x03) + 1) << 3; 1141 multiblock = (s->frame_flags & WV_SINGLE_BLOCK) != WV_SINGLE_BLOCK; 1142 1143 s->stereo = !(s->frame_flags & WV_MONO); 1144 s->stereo_in = (s->frame_flags & WV_FALSE_STEREO) ? 0 : s->stereo; 1145 s->joint = s->frame_flags & WV_JOINT_STEREO; 1146 s->hybrid = s->frame_flags & WV_HYBRID_MODE; 1147 s->hybrid_bitrate = s->frame_flags & WV_HYBRID_BITRATE; 1148 s->post_shift = bpp * 8 - orig_bpp + ((s->frame_flags >> 13) & 0x1f); 1149 if (s->post_shift < 0 || s->post_shift > 31) { 1150 return AVERROR_INVALIDDATA; 1151 } 1152 s->hybrid_maxclip = ((1LL << (orig_bpp - 1)) - 1); 1153 s->hybrid_minclip = ((-1UL << (orig_bpp - 1))); 1154 s->CRC = bytestream2_get_le32(&gb); 1155 1156 // parse metadata blocks 1157 while (bytestream2_get_bytes_left(&gb)) { 1158 id = bytestream2_get_byte(&gb); 1159 size = bytestream2_get_byte(&gb); 1160 if (id & WP_IDF_LONG) 1161 size |= (bytestream2_get_le16u(&gb)) << 8; 1162 size <<= 1; // size is specified in words 1163 ssize = size; 1164 if (id & WP_IDF_ODD) 1165 size--; 1166 if (size < 0) { 1167 av_log(avctx, AV_LOG_ERROR, 1168 "Got incorrect block %02X with size %i\n", id, size); 1169 break; 1170 } 1171 if (bytestream2_get_bytes_left(&gb) < ssize) { 1172 av_log(avctx, AV_LOG_ERROR, 1173 "Block size %i is out of bounds\n", size); 1174 break; 1175 } 1176 switch (id & WP_IDF_MASK) { 1177 case WP_ID_DECTERMS: 1178 if (size > MAX_TERMS) { 1179 av_log(avctx, AV_LOG_ERROR, "Too many decorrelation terms\n"); 1180 s->terms = 0; 1181 bytestream2_skip(&gb, ssize); 1182 continue; 1183 } 1184 s->terms = size; 1185 for (i = 0; i < s->terms; i++) { 1186 uint8_t val = bytestream2_get_byte(&gb); 1187 s->decorr[s->terms - i - 1].value = (val & 0x1F) - 5; 1188 s->decorr[s->terms - i - 1].delta = val >> 5; 1189 } 1190 got_terms = 1; 1191 break; 1192 case WP_ID_DECWEIGHTS: 1193 if (!got_terms) { 1194 av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); 1195 continue; 1196 } 1197 weights = size >> s->stereo_in; 1198 if (weights > MAX_TERMS || weights > s->terms) { 1199 av_log(avctx, AV_LOG_ERROR, "Too many decorrelation weights\n"); 1200 bytestream2_skip(&gb, ssize); 1201 continue; 1202 } 1203 for (i = 0; i < weights; i++) { 1204 t = (int8_t)bytestream2_get_byte(&gb); 1205 s->decorr[s->terms - i - 1].weightA = t * (1 << 3); 1206 if (s->decorr[s->terms - i - 1].weightA > 0) 1207 s->decorr[s->terms - i - 1].weightA += 1208 (s->decorr[s->terms - i - 1].weightA + 64) >> 7; 1209 if (s->stereo_in) { 1210 t = (int8_t)bytestream2_get_byte(&gb); 1211 s->decorr[s->terms - i - 1].weightB = t * (1 << 3); 1212 if (s->decorr[s->terms - i - 1].weightB > 0) 1213 s->decorr[s->terms - i - 1].weightB += 1214 (s->decorr[s->terms - i - 1].weightB + 64) >> 7; 1215 } 1216 } 1217 got_weights = 1; 1218 break; 1219 case WP_ID_DECSAMPLES: 1220 if (!got_terms) { 1221 av_log(avctx, AV_LOG_ERROR, "No decorrelation terms met\n"); 1222 continue; 1223 } 1224 t = 0; 1225 for (i = s->terms - 1; (i >= 0) && (t < size); i--) { 1226 if (s->decorr[i].value > 8) { 1227 s->decorr[i].samplesA[0] = 1228 wp_exp2(bytestream2_get_le16(&gb)); 1229 s->decorr[i].samplesA[1] = 1230 wp_exp2(bytestream2_get_le16(&gb)); 1231 1232 if (s->stereo_in) { 1233 s->decorr[i].samplesB[0] = 1234 wp_exp2(bytestream2_get_le16(&gb)); 1235 s->decorr[i].samplesB[1] = 1236 wp_exp2(bytestream2_get_le16(&gb)); 1237 t += 4; 1238 } 1239 t += 4; 1240 } else if (s->decorr[i].value < 0) { 1241 s->decorr[i].samplesA[0] = 1242 wp_exp2(bytestream2_get_le16(&gb)); 1243 s->decorr[i].samplesB[0] = 1244 wp_exp2(bytestream2_get_le16(&gb)); 1245 t += 4; 1246 } else { 1247 for (j = 0; j < s->decorr[i].value; j++) { 1248 s->decorr[i].samplesA[j] = 1249 wp_exp2(bytestream2_get_le16(&gb)); 1250 if (s->stereo_in) { 1251 s->decorr[i].samplesB[j] = 1252 wp_exp2(bytestream2_get_le16(&gb)); 1253 } 1254 } 1255 t += s->decorr[i].value * 2 * (s->stereo_in + 1); 1256 } 1257 } 1258 got_samples = 1; 1259 break; 1260 case WP_ID_ENTROPY: 1261 if (size != 6 * (s->stereo_in + 1)) { 1262 av_log(avctx, AV_LOG_ERROR, 1263 "Entropy vars size should be %i, got %i.\n", 1264 6 * (s->stereo_in + 1), size); 1265 bytestream2_skip(&gb, ssize); 1266 continue; 1267 } 1268 for (j = 0; j <= s->stereo_in; j++) 1269 for (i = 0; i < 3; i++) { 1270 s->ch[j].median[i] = wp_exp2(bytestream2_get_le16(&gb)); 1271 } 1272 got_entropy = 1; 1273 break; 1274 case WP_ID_HYBRID: 1275 if (s->hybrid_bitrate) { 1276 for (i = 0; i <= s->stereo_in; i++) { 1277 s->ch[i].slow_level = wp_exp2(bytestream2_get_le16(&gb)); 1278 size -= 2; 1279 } 1280 } 1281 for (i = 0; i < (s->stereo_in + 1); i++) { 1282 s->ch[i].bitrate_acc = bytestream2_get_le16(&gb) << 16; 1283 size -= 2; 1284 } 1285 if (size > 0) { 1286 for (i = 0; i < (s->stereo_in + 1); i++) { 1287 s->ch[i].bitrate_delta = 1288 wp_exp2((int16_t)bytestream2_get_le16(&gb)); 1289 } 1290 } else { 1291 for (i = 0; i < (s->stereo_in + 1); i++) 1292 s->ch[i].bitrate_delta = 0; 1293 } 1294 got_hybrid = 1; 1295 break; 1296 case WP_ID_INT32INFO: { 1297 uint8_t val[4]; 1298 if (size != 4) { 1299 av_log(avctx, AV_LOG_ERROR, 1300 "Invalid INT32INFO, size = %i\n", 1301 size); 1302 bytestream2_skip(&gb, ssize - 4); 1303 continue; 1304 } 1305 bytestream2_get_buffer(&gb, val, 4); 1306 if (val[0] > 30) { 1307 av_log(avctx, AV_LOG_ERROR, 1308 "Invalid INT32INFO, extra_bits = %d (> 30)\n", val[0]); 1309 continue; 1310 } else { 1311 s->extra_bits = val[0]; 1312 } 1313 if (val[1]) 1314 s->shift = val[1]; 1315 if (val[2]) { 1316 s->and = s->or = 1; 1317 s->shift = val[2]; 1318 } 1319 if (val[3]) { 1320 s->and = 1; 1321 s->shift = val[3]; 1322 } 1323 if (s->shift > 31) { 1324 av_log(avctx, AV_LOG_ERROR, 1325 "Invalid INT32INFO, shift = %d (> 31)\n", s->shift); 1326 s->and = s->or = s->shift = 0; 1327 continue; 1328 } 1329 /* original WavPack decoder forces 32-bit lossy sound to be treated 1330 * as 24-bit one in order to have proper clipping */ 1331 if (s->hybrid && bpp == 4 && s->post_shift < 8 && s->shift > 8) { 1332 s->post_shift += 8; 1333 s->shift -= 8; 1334 s->hybrid_maxclip >>= 8; 1335 s->hybrid_minclip >>= 8; 1336 } 1337 break; 1338 } 1339 case WP_ID_FLOATINFO: 1340 if (size != 4) { 1341 av_log(avctx, AV_LOG_ERROR, 1342 "Invalid FLOATINFO, size = %i\n", size); 1343 bytestream2_skip(&gb, ssize); 1344 continue; 1345 } 1346 s->float_flag = bytestream2_get_byte(&gb); 1347 s->float_shift = bytestream2_get_byte(&gb); 1348 s->float_max_exp = bytestream2_get_byte(&gb); 1349 if (s->float_shift > 31) { 1350 av_log(avctx, AV_LOG_ERROR, 1351 "Invalid FLOATINFO, shift = %d (> 31)\n", s->float_shift); 1352 s->float_shift = 0; 1353 continue; 1354 } 1355 got_float = 1; 1356 bytestream2_skip(&gb, 1); 1357 break; 1358 case WP_ID_DATA: 1359 if ((ret = init_get_bits8(&s->gb, gb.buffer, size)) < 0) 1360 return ret; 1361 bytestream2_skip(&gb, size); 1362 got_pcm = 1; 1363 break; 1364 case WP_ID_DSD_DATA: 1365 if (size < 2) { 1366 av_log(avctx, AV_LOG_ERROR, "Invalid DSD_DATA, size = %i\n", 1367 size); 1368 bytestream2_skip(&gb, ssize); 1369 continue; 1370 } 1371 rate_x = bytestream2_get_byte(&gb); 1372 if (rate_x > 30) 1373 return AVERROR_INVALIDDATA; 1374 rate_x = 1 << rate_x; 1375 dsd_mode = bytestream2_get_byte(&gb); 1376 if (dsd_mode && dsd_mode != 1 && dsd_mode != 3) { 1377 av_log(avctx, AV_LOG_ERROR, "Invalid DSD encoding mode: %d\n", 1378 dsd_mode); 1379 return AVERROR_INVALIDDATA; 1380 } 1381 bytestream2_init(&s->gbyte, gb.buffer, size-2); 1382 bytestream2_skip(&gb, size-2); 1383 got_dsd = 1; 1384 break; 1385 case WP_ID_EXTRABITS: 1386 if (size <= 4) { 1387 av_log(avctx, AV_LOG_ERROR, "Invalid EXTRABITS, size = %i\n", 1388 size); 1389 bytestream2_skip(&gb, size); 1390 continue; 1391 } 1392 if ((ret = init_get_bits8(&s->gb_extra_bits, gb.buffer, size)) < 0) 1393 return ret; 1394 s->crc_extra_bits = get_bits_long(&s->gb_extra_bits, 32); 1395 bytestream2_skip(&gb, size); 1396 s->got_extra_bits = 1; 1397 break; 1398 case WP_ID_CHANINFO: 1399 if (size <= 1) { 1400 av_log(avctx, AV_LOG_ERROR, 1401 "Insufficient channel information\n"); 1402 return AVERROR_INVALIDDATA; 1403 } 1404 chan = bytestream2_get_byte(&gb); 1405 switch (size - 2) { 1406 case 0: 1407 chmask = bytestream2_get_byte(&gb); 1408 break; 1409 case 1: 1410 chmask = bytestream2_get_le16(&gb); 1411 break; 1412 case 2: 1413 chmask = bytestream2_get_le24(&gb); 1414 break; 1415 case 3: 1416 chmask = bytestream2_get_le32(&gb); 1417 break; 1418 case 4: 1419 size = bytestream2_get_byte(&gb); 1420 chan |= (bytestream2_get_byte(&gb) & 0xF) << 8; 1421 chan += 1; 1422 if (avctx->ch_layout.nb_channels != chan) 1423 av_log(avctx, AV_LOG_WARNING, "%i channels signalled" 1424 " instead of %i.\n", chan, avctx->ch_layout.nb_channels); 1425 chmask = bytestream2_get_le24(&gb); 1426 break; 1427 case 5: 1428 size = bytestream2_get_byte(&gb); 1429 chan |= (bytestream2_get_byte(&gb) & 0xF) << 8; 1430 chan += 1; 1431 if (avctx->ch_layout.nb_channels != chan) 1432 av_log(avctx, AV_LOG_WARNING, "%i channels signalled" 1433 " instead of %i.\n", chan, avctx->ch_layout.nb_channels); 1434 chmask = bytestream2_get_le32(&gb); 1435 break; 1436 default: 1437 av_log(avctx, AV_LOG_ERROR, "Invalid channel info size %d\n", 1438 size); 1439 } 1440 break; 1441 case WP_ID_SAMPLE_RATE: 1442 if (size != 3) { 1443 av_log(avctx, AV_LOG_ERROR, "Invalid custom sample rate.\n"); 1444 return AVERROR_INVALIDDATA; 1445 } 1446 sample_rate = bytestream2_get_le24(&gb); 1447 break; 1448 default: 1449 bytestream2_skip(&gb, size); 1450 } 1451 if (id & WP_IDF_ODD) 1452 bytestream2_skip(&gb, 1); 1453 } 1454 1455 if (got_pcm) { 1456 if (!got_terms) { 1457 av_log(avctx, AV_LOG_ERROR, "No block with decorrelation terms\n"); 1458 return AVERROR_INVALIDDATA; 1459 } 1460 if (!got_weights) { 1461 av_log(avctx, AV_LOG_ERROR, "No block with decorrelation weights\n"); 1462 return AVERROR_INVALIDDATA; 1463 } 1464 if (!got_samples) { 1465 av_log(avctx, AV_LOG_ERROR, "No block with decorrelation samples\n"); 1466 return AVERROR_INVALIDDATA; 1467 } 1468 if (!got_entropy) { 1469 av_log(avctx, AV_LOG_ERROR, "No block with entropy info\n"); 1470 return AVERROR_INVALIDDATA; 1471 } 1472 if (s->hybrid && !got_hybrid) { 1473 av_log(avctx, AV_LOG_ERROR, "Hybrid config not found\n"); 1474 return AVERROR_INVALIDDATA; 1475 } 1476 if (!got_float && sample_fmt == AV_SAMPLE_FMT_FLTP) { 1477 av_log(avctx, AV_LOG_ERROR, "Float information not found\n"); 1478 return AVERROR_INVALIDDATA; 1479 } 1480 if (s->got_extra_bits && sample_fmt != AV_SAMPLE_FMT_FLTP) { 1481 const int size = get_bits_left(&s->gb_extra_bits); 1482 const int wanted = s->samples * s->extra_bits << s->stereo_in; 1483 if (size < wanted) { 1484 av_log(avctx, AV_LOG_ERROR, "Too small EXTRABITS\n"); 1485 s->got_extra_bits = 0; 1486 } 1487 } 1488 } 1489 1490 if (!got_pcm && !got_dsd) { 1491 av_log(avctx, AV_LOG_ERROR, "Packed samples not found\n"); 1492 return AVERROR_INVALIDDATA; 1493 } 1494 1495 if ((got_pcm && wc->modulation != MODULATION_PCM) || 1496 (got_dsd && wc->modulation != MODULATION_DSD)) { 1497 av_log(avctx, AV_LOG_ERROR, "Invalid PCM/DSD mix encountered\n"); 1498 return AVERROR_INVALIDDATA; 1499 } 1500 1501 if (!wc->ch_offset) { 1502 AVChannelLayout new_ch_layout = { 0 }; 1503 int new_samplerate; 1504 int sr = (s->frame_flags >> 23) & 0xf; 1505 if (sr == 0xf) { 1506 if (!sample_rate) { 1507 av_log(avctx, AV_LOG_ERROR, "Custom sample rate missing.\n"); 1508 return AVERROR_INVALIDDATA; 1509 } 1510 new_samplerate = sample_rate; 1511 } else 1512 new_samplerate = wv_rates[sr]; 1513 1514 if (new_samplerate * (uint64_t)rate_x > INT_MAX) 1515 return AVERROR_INVALIDDATA; 1516 new_samplerate *= rate_x; 1517 1518 if (multiblock) { 1519 if (chmask) { 1520 av_channel_layout_from_mask(&new_ch_layout, chmask); 1521 if (chan && new_ch_layout.nb_channels != chan) { 1522 av_log(avctx, AV_LOG_ERROR, "Channel mask does not match the channel count\n"); 1523 return AVERROR_INVALIDDATA; 1524 } 1525 } else { 1526 ret = av_channel_layout_copy(&new_ch_layout, &avctx->ch_layout); 1527 if (ret < 0) { 1528 av_log(avctx, AV_LOG_ERROR, "Error copying channel layout\n"); 1529 return ret; 1530 } 1531 } 1532 } else { 1533 av_channel_layout_default(&new_ch_layout, s->stereo + 1); 1534 } 1535 1536 /* clear DSD state if stream properties change */ 1537 if (new_ch_layout.nb_channels != wc->dsd_channels || 1538 av_channel_layout_compare(&new_ch_layout, &avctx->ch_layout) || 1539 new_samplerate != avctx->sample_rate || 1540 !!got_dsd != !!wc->dsdctx) { 1541 ret = wv_dsd_reset(wc, got_dsd ? new_ch_layout.nb_channels : 0); 1542 if (ret < 0) { 1543 av_log(avctx, AV_LOG_ERROR, "Error reinitializing the DSD context\n"); 1544 return ret; 1545 } 1546 ff_thread_release_ext_buffer(avctx, &wc->curr_frame); 1547 } 1548 av_channel_layout_copy(&avctx->ch_layout, &new_ch_layout); 1549 avctx->sample_rate = new_samplerate; 1550 avctx->sample_fmt = sample_fmt; 1551 avctx->bits_per_raw_sample = orig_bpp; 1552 1553 ff_thread_release_ext_buffer(avctx, &wc->prev_frame); 1554 FFSWAP(ThreadFrame, wc->curr_frame, wc->prev_frame); 1555 1556 /* get output buffer */ 1557 wc->curr_frame.f->nb_samples = s->samples; 1558 ret = ff_thread_get_ext_buffer(avctx, &wc->curr_frame, 1559 AV_GET_BUFFER_FLAG_REF); 1560 if (ret < 0) 1561 return ret; 1562 1563 wc->frame = wc->curr_frame.f; 1564 ff_thread_finish_setup(avctx); 1565 } 1566 1567 if (wc->ch_offset + s->stereo >= avctx->ch_layout.nb_channels) { 1568 av_log(avctx, AV_LOG_WARNING, "Too many channels coded in a packet.\n"); 1569 return ((avctx->err_recognition & AV_EF_EXPLODE) || !wc->ch_offset) ? AVERROR_INVALIDDATA : 0; 1570 } 1571 1572 samples_l = wc->frame->extended_data[wc->ch_offset]; 1573 if (s->stereo) 1574 samples_r = wc->frame->extended_data[wc->ch_offset + 1]; 1575 1576 wc->ch_offset += 1 + s->stereo; 1577 1578 if (s->stereo_in) { 1579 if (got_dsd) { 1580 if (dsd_mode == 3) { 1581 ret = wv_unpack_dsd_high(s, samples_l, samples_r); 1582 } else if (dsd_mode == 1) { 1583 ret = wv_unpack_dsd_fast(s, samples_l, samples_r); 1584 } else { 1585 ret = wv_unpack_dsd_copy(s, samples_l, samples_r); 1586 } 1587 } else { 1588 ret = wv_unpack_stereo(s, &s->gb, samples_l, samples_r, avctx->sample_fmt); 1589 } 1590 if (ret < 0) 1591 return ret; 1592 } else { 1593 if (got_dsd) { 1594 if (dsd_mode == 3) { 1595 ret = wv_unpack_dsd_high(s, samples_l, NULL); 1596 } else if (dsd_mode == 1) { 1597 ret = wv_unpack_dsd_fast(s, samples_l, NULL); 1598 } else { 1599 ret = wv_unpack_dsd_copy(s, samples_l, NULL); 1600 } 1601 } else { 1602 ret = wv_unpack_mono(s, &s->gb, samples_l, avctx->sample_fmt); 1603 } 1604 if (ret < 0) 1605 return ret; 1606 1607 if (s->stereo) 1608 memcpy(samples_r, samples_l, bpp * s->samples); 1609 } 1610 1611 return 0; 1612} 1613 1614static void wavpack_decode_flush(AVCodecContext *avctx) 1615{ 1616 WavpackContext *s = avctx->priv_data; 1617 1618 wv_dsd_reset(s, 0); 1619} 1620 1621static int dsd_channel(AVCodecContext *avctx, void *frmptr, int jobnr, int threadnr) 1622{ 1623 WavpackContext *s = avctx->priv_data; 1624 AVFrame *frame = frmptr; 1625 1626 ff_dsd2pcm_translate (&s->dsdctx [jobnr], s->samples, 0, 1627 (uint8_t *)frame->extended_data[jobnr], 4, 1628 (float *)frame->extended_data[jobnr], 1); 1629 1630 return 0; 1631} 1632 1633static int wavpack_decode_frame(AVCodecContext *avctx, AVFrame *rframe, 1634 int *got_frame_ptr, AVPacket *avpkt) 1635{ 1636 WavpackContext *s = avctx->priv_data; 1637 const uint8_t *buf = avpkt->data; 1638 int buf_size = avpkt->size; 1639 int frame_size, ret, frame_flags; 1640 1641 if (avpkt->size <= WV_HEADER_SIZE) 1642 return AVERROR_INVALIDDATA; 1643 1644 s->frame = NULL; 1645 s->block = 0; 1646 s->ch_offset = 0; 1647 1648 /* determine number of samples */ 1649 s->samples = AV_RL32(buf + 20); 1650 frame_flags = AV_RL32(buf + 24); 1651 if (s->samples <= 0 || s->samples > WV_MAX_SAMPLES) { 1652 av_log(avctx, AV_LOG_ERROR, "Invalid number of samples: %d\n", 1653 s->samples); 1654 return AVERROR_INVALIDDATA; 1655 } 1656 1657 s->modulation = (frame_flags & WV_DSD_DATA) ? MODULATION_DSD : MODULATION_PCM; 1658 1659 while (buf_size > WV_HEADER_SIZE) { 1660 frame_size = AV_RL32(buf + 4) - 12; 1661 buf += 20; 1662 buf_size -= 20; 1663 if (frame_size <= 0 || frame_size > buf_size) { 1664 av_log(avctx, AV_LOG_ERROR, 1665 "Block %d has invalid size (size %d vs. %d bytes left)\n", 1666 s->block, frame_size, buf_size); 1667 ret = AVERROR_INVALIDDATA; 1668 goto error; 1669 } 1670 if ((ret = wavpack_decode_block(avctx, s->block, buf, frame_size)) < 0) 1671 goto error; 1672 s->block++; 1673 buf += frame_size; 1674 buf_size -= frame_size; 1675 } 1676 1677 if (s->ch_offset != avctx->ch_layout.nb_channels) { 1678 av_log(avctx, AV_LOG_ERROR, "Not enough channels coded in a packet.\n"); 1679 ret = AVERROR_INVALIDDATA; 1680 goto error; 1681 } 1682 1683 ff_thread_await_progress(&s->prev_frame, INT_MAX, 0); 1684 ff_thread_release_ext_buffer(avctx, &s->prev_frame); 1685 1686 if (s->modulation == MODULATION_DSD) 1687 avctx->execute2(avctx, dsd_channel, s->frame, NULL, avctx->ch_layout.nb_channels); 1688 1689 ff_thread_report_progress(&s->curr_frame, INT_MAX, 0); 1690 1691 if ((ret = av_frame_ref(rframe, s->frame)) < 0) 1692 return ret; 1693 1694 *got_frame_ptr = 1; 1695 1696 return avpkt->size; 1697 1698error: 1699 if (s->frame) { 1700 ff_thread_await_progress(&s->prev_frame, INT_MAX, 0); 1701 ff_thread_release_ext_buffer(avctx, &s->prev_frame); 1702 ff_thread_report_progress(&s->curr_frame, INT_MAX, 0); 1703 } 1704 1705 return ret; 1706} 1707 1708const FFCodec ff_wavpack_decoder = { 1709 .p.name = "wavpack", 1710 .p.long_name = NULL_IF_CONFIG_SMALL("WavPack"), 1711 .p.type = AVMEDIA_TYPE_AUDIO, 1712 .p.id = AV_CODEC_ID_WAVPACK, 1713 .priv_data_size = sizeof(WavpackContext), 1714 .init = wavpack_decode_init, 1715 .close = wavpack_decode_end, 1716 FF_CODEC_DECODE_CB(wavpack_decode_frame), 1717 .flush = wavpack_decode_flush, 1718 .update_thread_context = ONLY_IF_THREADS_ENABLED(update_thread_context), 1719 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | 1720 AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_CHANNEL_CONF, 1721 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP | 1722 FF_CODEC_CAP_ALLOCATE_PROGRESS, 1723}; 1724