1/* 2 * OpenEXR (.exr) image decoder 3 * Copyright (c) 2006 Industrial Light & Magic, a division of Lucas Digital Ltd. LLC 4 * Copyright (c) 2009 Jimmy Christensen 5 * 6 * B44/B44A, Tile, UINT32 added by Jokyo Images support by CNC - French National Center for Cinema 7 * 8 * This file is part of FFmpeg. 9 * 10 * FFmpeg is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU Lesser General Public 12 * License as published by the Free Software Foundation; either 13 * version 2.1 of the License, or (at your option) any later version. 14 * 15 * FFmpeg is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * Lesser General Public License for more details. 19 * 20 * You should have received a copy of the GNU Lesser General Public 21 * License along with FFmpeg; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 23 */ 24 25/** 26 * @file 27 * OpenEXR decoder 28 * @author Jimmy Christensen 29 * 30 * For more information on the OpenEXR format, visit: 31 * http://openexr.com/ 32 */ 33 34#include <float.h> 35#include <zlib.h> 36 37#include "libavutil/avassert.h" 38#include "libavutil/common.h" 39#include "libavutil/imgutils.h" 40#include "libavutil/intfloat.h" 41#include "libavutil/avstring.h" 42#include "libavutil/opt.h" 43#include "libavutil/color_utils.h" 44 45#include "avcodec.h" 46#include "bytestream.h" 47 48#if HAVE_BIGENDIAN 49#include "bswapdsp.h" 50#endif 51 52#include "codec_internal.h" 53#include "exrdsp.h" 54#include "get_bits.h" 55#include "internal.h" 56#include "half2float.h" 57#include "mathops.h" 58#include "thread.h" 59 60enum ExrCompr { 61 EXR_RAW, 62 EXR_RLE, 63 EXR_ZIP1, 64 EXR_ZIP16, 65 EXR_PIZ, 66 EXR_PXR24, 67 EXR_B44, 68 EXR_B44A, 69 EXR_DWAA, 70 EXR_DWAB, 71 EXR_UNKN, 72}; 73 74enum ExrPixelType { 75 EXR_UINT, 76 EXR_HALF, 77 EXR_FLOAT, 78 EXR_UNKNOWN, 79}; 80 81enum ExrTileLevelMode { 82 EXR_TILE_LEVEL_ONE, 83 EXR_TILE_LEVEL_MIPMAP, 84 EXR_TILE_LEVEL_RIPMAP, 85 EXR_TILE_LEVEL_UNKNOWN, 86}; 87 88enum ExrTileLevelRound { 89 EXR_TILE_ROUND_UP, 90 EXR_TILE_ROUND_DOWN, 91 EXR_TILE_ROUND_UNKNOWN, 92}; 93 94typedef struct HuffEntry { 95 uint8_t len; 96 uint16_t sym; 97 uint32_t code; 98} HuffEntry; 99 100typedef struct EXRChannel { 101 int xsub, ysub; 102 enum ExrPixelType pixel_type; 103} EXRChannel; 104 105typedef struct EXRTileAttribute { 106 int32_t xSize; 107 int32_t ySize; 108 enum ExrTileLevelMode level_mode; 109 enum ExrTileLevelRound level_round; 110} EXRTileAttribute; 111 112typedef struct EXRThreadData { 113 uint8_t *uncompressed_data; 114 int uncompressed_size; 115 116 uint8_t *tmp; 117 int tmp_size; 118 119 uint8_t *bitmap; 120 uint16_t *lut; 121 122 uint8_t *ac_data; 123 unsigned ac_size; 124 125 uint8_t *dc_data; 126 unsigned dc_size; 127 128 uint8_t *rle_data; 129 unsigned rle_size; 130 131 uint8_t *rle_raw_data; 132 unsigned rle_raw_size; 133 134 float block[3][64]; 135 136 int ysize, xsize; 137 138 int channel_line_size; 139 140 int run_sym; 141 HuffEntry *he; 142 uint64_t *freq; 143 VLC vlc; 144} EXRThreadData; 145 146typedef struct EXRContext { 147 AVClass *class; 148 AVFrame *picture; 149 AVCodecContext *avctx; 150 ExrDSPContext dsp; 151 152#if HAVE_BIGENDIAN 153 BswapDSPContext bbdsp; 154#endif 155 156 enum ExrCompr compression; 157 enum ExrPixelType pixel_type; 158 int channel_offsets[4]; // 0 = red, 1 = green, 2 = blue and 3 = alpha 159 const AVPixFmtDescriptor *desc; 160 161 int w, h; 162 uint32_t sar; 163 int32_t xmax, xmin; 164 int32_t ymax, ymin; 165 uint32_t xdelta, ydelta; 166 167 int scan_lines_per_block; 168 169 EXRTileAttribute tile_attr; /* header data attribute of tile */ 170 int is_tile; /* 0 if scanline, 1 if tile */ 171 int is_multipart; 172 int current_part; 173 174 int is_luma;/* 1 if there is an Y plane */ 175 176 GetByteContext gb; 177 const uint8_t *buf; 178 int buf_size; 179 180 EXRChannel *channels; 181 int nb_channels; 182 int current_channel_offset; 183 uint32_t chunk_count; 184 185 EXRThreadData *thread_data; 186 187 const char *layer; 188 int selected_part; 189 190 enum AVColorTransferCharacteristic apply_trc_type; 191 float gamma; 192 union av_intfloat32 gamma_table[65536]; 193 194 uint32_t mantissatable[2048]; 195 uint32_t exponenttable[64]; 196 uint16_t offsettable[64]; 197} EXRContext; 198 199static int zip_uncompress(EXRContext *s, const uint8_t *src, int compressed_size, 200 int uncompressed_size, EXRThreadData *td) 201{ 202 unsigned long dest_len = uncompressed_size; 203 204 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK || 205 dest_len != uncompressed_size) 206 return AVERROR_INVALIDDATA; 207 208 av_assert1(uncompressed_size % 2 == 0); 209 210 s->dsp.predictor(td->tmp, uncompressed_size); 211 s->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size); 212 213 return 0; 214} 215 216static int rle(uint8_t *dst, const uint8_t *src, 217 int compressed_size, int uncompressed_size) 218{ 219 uint8_t *d = dst; 220 const int8_t *s = src; 221 int ssize = compressed_size; 222 int dsize = uncompressed_size; 223 uint8_t *dend = d + dsize; 224 int count; 225 226 while (ssize > 0) { 227 count = *s++; 228 229 if (count < 0) { 230 count = -count; 231 232 if ((dsize -= count) < 0 || 233 (ssize -= count + 1) < 0) 234 return AVERROR_INVALIDDATA; 235 236 while (count--) 237 *d++ = *s++; 238 } else { 239 count++; 240 241 if ((dsize -= count) < 0 || 242 (ssize -= 2) < 0) 243 return AVERROR_INVALIDDATA; 244 245 while (count--) 246 *d++ = *s; 247 248 s++; 249 } 250 } 251 252 if (dend != d) 253 return AVERROR_INVALIDDATA; 254 255 return 0; 256} 257 258static int rle_uncompress(EXRContext *ctx, const uint8_t *src, int compressed_size, 259 int uncompressed_size, EXRThreadData *td) 260{ 261 rle(td->tmp, src, compressed_size, uncompressed_size); 262 263 av_assert1(uncompressed_size % 2 == 0); 264 265 ctx->dsp.predictor(td->tmp, uncompressed_size); 266 ctx->dsp.reorder_pixels(td->uncompressed_data, td->tmp, uncompressed_size); 267 268 return 0; 269} 270 271#define USHORT_RANGE (1 << 16) 272#define BITMAP_SIZE (1 << 13) 273 274static uint16_t reverse_lut(const uint8_t *bitmap, uint16_t *lut) 275{ 276 int i, k = 0; 277 278 for (i = 0; i < USHORT_RANGE; i++) 279 if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7)))) 280 lut[k++] = i; 281 282 i = k - 1; 283 284 memset(lut + k, 0, (USHORT_RANGE - k) * 2); 285 286 return i; 287} 288 289static void apply_lut(const uint16_t *lut, uint16_t *dst, int dsize) 290{ 291 int i; 292 293 for (i = 0; i < dsize; ++i) 294 dst[i] = lut[dst[i]]; 295} 296 297#define HUF_ENCBITS 16 // literal (value) bit length 298#define HUF_ENCSIZE ((1 << HUF_ENCBITS) + 1) // encoding table size 299 300static void huf_canonical_code_table(uint64_t *freq) 301{ 302 uint64_t c, n[59] = { 0 }; 303 int i; 304 305 for (i = 0; i < HUF_ENCSIZE; i++) 306 n[freq[i]] += 1; 307 308 c = 0; 309 for (i = 58; i > 0; --i) { 310 uint64_t nc = ((c + n[i]) >> 1); 311 n[i] = c; 312 c = nc; 313 } 314 315 for (i = 0; i < HUF_ENCSIZE; ++i) { 316 int l = freq[i]; 317 318 if (l > 0) 319 freq[i] = l | (n[l]++ << 6); 320 } 321} 322 323#define SHORT_ZEROCODE_RUN 59 324#define LONG_ZEROCODE_RUN 63 325#define SHORTEST_LONG_RUN (2 + LONG_ZEROCODE_RUN - SHORT_ZEROCODE_RUN) 326#define LONGEST_LONG_RUN (255 + SHORTEST_LONG_RUN) 327 328static int huf_unpack_enc_table(GetByteContext *gb, 329 int32_t im, int32_t iM, uint64_t *freq) 330{ 331 GetBitContext gbit; 332 int ret = init_get_bits8(&gbit, gb->buffer, bytestream2_get_bytes_left(gb)); 333 if (ret < 0) 334 return ret; 335 336 for (; im <= iM; im++) { 337 uint64_t l = freq[im] = get_bits(&gbit, 6); 338 339 if (l == LONG_ZEROCODE_RUN) { 340 int zerun = get_bits(&gbit, 8) + SHORTEST_LONG_RUN; 341 342 if (im + zerun > iM + 1) 343 return AVERROR_INVALIDDATA; 344 345 while (zerun--) 346 freq[im++] = 0; 347 348 im--; 349 } else if (l >= SHORT_ZEROCODE_RUN) { 350 int zerun = l - SHORT_ZEROCODE_RUN + 2; 351 352 if (im + zerun > iM + 1) 353 return AVERROR_INVALIDDATA; 354 355 while (zerun--) 356 freq[im++] = 0; 357 358 im--; 359 } 360 } 361 362 bytestream2_skip(gb, (get_bits_count(&gbit) + 7) / 8); 363 huf_canonical_code_table(freq); 364 365 return 0; 366} 367 368static int huf_build_dec_table(EXRContext *s, 369 EXRThreadData *td, int im, int iM) 370{ 371 int j = 0; 372 373 td->run_sym = -1; 374 for (int i = im; i < iM; i++) { 375 td->he[j].sym = i; 376 td->he[j].len = td->freq[i] & 63; 377 td->he[j].code = td->freq[i] >> 6; 378 if (td->he[j].len > 32) { 379 avpriv_request_sample(s->avctx, "Too big code length"); 380 return AVERROR_PATCHWELCOME; 381 } 382 if (td->he[j].len > 0) 383 j++; 384 else 385 td->run_sym = i; 386 } 387 388 if (im > 0) 389 td->run_sym = 0; 390 else if (iM < 65535) 391 td->run_sym = 65535; 392 393 if (td->run_sym == -1) { 394 avpriv_request_sample(s->avctx, "No place for run symbol"); 395 return AVERROR_PATCHWELCOME; 396 } 397 398 td->he[j].sym = td->run_sym; 399 td->he[j].len = td->freq[iM] & 63; 400 if (td->he[j].len > 32) { 401 avpriv_request_sample(s->avctx, "Too big code length"); 402 return AVERROR_PATCHWELCOME; 403 } 404 td->he[j].code = td->freq[iM] >> 6; 405 j++; 406 407 ff_free_vlc(&td->vlc); 408 return ff_init_vlc_sparse(&td->vlc, 12, j, 409 &td->he[0].len, sizeof(td->he[0]), sizeof(td->he[0].len), 410 &td->he[0].code, sizeof(td->he[0]), sizeof(td->he[0].code), 411 &td->he[0].sym, sizeof(td->he[0]), sizeof(td->he[0].sym), 0); 412} 413 414static int huf_decode(VLC *vlc, GetByteContext *gb, int nbits, int run_sym, 415 int no, uint16_t *out) 416{ 417 GetBitContext gbit; 418 int oe = 0; 419 420 init_get_bits(&gbit, gb->buffer, nbits); 421 while (get_bits_left(&gbit) > 0 && oe < no) { 422 uint16_t x = get_vlc2(&gbit, vlc->table, 12, 3); 423 424 if (x == run_sym) { 425 int run = get_bits(&gbit, 8); 426 uint16_t fill; 427 428 if (oe == 0 || oe + run > no) 429 return AVERROR_INVALIDDATA; 430 431 fill = out[oe - 1]; 432 433 while (run-- > 0) 434 out[oe++] = fill; 435 } else { 436 out[oe++] = x; 437 } 438 } 439 440 return 0; 441} 442 443static int huf_uncompress(EXRContext *s, 444 EXRThreadData *td, 445 GetByteContext *gb, 446 uint16_t *dst, int dst_size) 447{ 448 int32_t im, iM; 449 uint32_t nBits; 450 int ret; 451 452 im = bytestream2_get_le32(gb); 453 iM = bytestream2_get_le32(gb); 454 bytestream2_skip(gb, 4); 455 nBits = bytestream2_get_le32(gb); 456 if (im < 0 || im >= HUF_ENCSIZE || 457 iM < 0 || iM >= HUF_ENCSIZE) 458 return AVERROR_INVALIDDATA; 459 460 bytestream2_skip(gb, 4); 461 462 if (!td->freq) 463 td->freq = av_malloc_array(HUF_ENCSIZE, sizeof(*td->freq)); 464 if (!td->he) 465 td->he = av_calloc(HUF_ENCSIZE, sizeof(*td->he)); 466 if (!td->freq || !td->he) { 467 ret = AVERROR(ENOMEM); 468 return ret; 469 } 470 471 memset(td->freq, 0, sizeof(*td->freq) * HUF_ENCSIZE); 472 if ((ret = huf_unpack_enc_table(gb, im, iM, td->freq)) < 0) 473 return ret; 474 475 if (nBits > 8 * bytestream2_get_bytes_left(gb)) { 476 ret = AVERROR_INVALIDDATA; 477 return ret; 478 } 479 480 if ((ret = huf_build_dec_table(s, td, im, iM)) < 0) 481 return ret; 482 return huf_decode(&td->vlc, gb, nBits, td->run_sym, dst_size, dst); 483} 484 485static inline void wdec14(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b) 486{ 487 int16_t ls = l; 488 int16_t hs = h; 489 int hi = hs; 490 int ai = ls + (hi & 1) + (hi >> 1); 491 int16_t as = ai; 492 int16_t bs = ai - hi; 493 494 *a = as; 495 *b = bs; 496} 497 498#define NBITS 16 499#define A_OFFSET (1 << (NBITS - 1)) 500#define MOD_MASK ((1 << NBITS) - 1) 501 502static inline void wdec16(uint16_t l, uint16_t h, uint16_t *a, uint16_t *b) 503{ 504 int m = l; 505 int d = h; 506 int bb = (m - (d >> 1)) & MOD_MASK; 507 int aa = (d + bb - A_OFFSET) & MOD_MASK; 508 *b = bb; 509 *a = aa; 510} 511 512static void wav_decode(uint16_t *in, int nx, int ox, 513 int ny, int oy, uint16_t mx) 514{ 515 int w14 = (mx < (1 << 14)); 516 int n = (nx > ny) ? ny : nx; 517 int p = 1; 518 int p2; 519 520 while (p <= n) 521 p <<= 1; 522 523 p >>= 1; 524 p2 = p; 525 p >>= 1; 526 527 while (p >= 1) { 528 uint16_t *py = in; 529 uint16_t *ey = in + oy * (ny - p2); 530 uint16_t i00, i01, i10, i11; 531 int oy1 = oy * p; 532 int oy2 = oy * p2; 533 int ox1 = ox * p; 534 int ox2 = ox * p2; 535 536 for (; py <= ey; py += oy2) { 537 uint16_t *px = py; 538 uint16_t *ex = py + ox * (nx - p2); 539 540 for (; px <= ex; px += ox2) { 541 uint16_t *p01 = px + ox1; 542 uint16_t *p10 = px + oy1; 543 uint16_t *p11 = p10 + ox1; 544 545 if (w14) { 546 wdec14(*px, *p10, &i00, &i10); 547 wdec14(*p01, *p11, &i01, &i11); 548 wdec14(i00, i01, px, p01); 549 wdec14(i10, i11, p10, p11); 550 } else { 551 wdec16(*px, *p10, &i00, &i10); 552 wdec16(*p01, *p11, &i01, &i11); 553 wdec16(i00, i01, px, p01); 554 wdec16(i10, i11, p10, p11); 555 } 556 } 557 558 if (nx & p) { 559 uint16_t *p10 = px + oy1; 560 561 if (w14) 562 wdec14(*px, *p10, &i00, p10); 563 else 564 wdec16(*px, *p10, &i00, p10); 565 566 *px = i00; 567 } 568 } 569 570 if (ny & p) { 571 uint16_t *px = py; 572 uint16_t *ex = py + ox * (nx - p2); 573 574 for (; px <= ex; px += ox2) { 575 uint16_t *p01 = px + ox1; 576 577 if (w14) 578 wdec14(*px, *p01, &i00, p01); 579 else 580 wdec16(*px, *p01, &i00, p01); 581 582 *px = i00; 583 } 584 } 585 586 p2 = p; 587 p >>= 1; 588 } 589} 590 591static int piz_uncompress(EXRContext *s, const uint8_t *src, int ssize, 592 int dsize, EXRThreadData *td) 593{ 594 GetByteContext gb; 595 uint16_t maxval, min_non_zero, max_non_zero; 596 uint16_t *ptr; 597 uint16_t *tmp = (uint16_t *)td->tmp; 598 uint16_t *out; 599 uint16_t *in; 600 int ret, i, j; 601 int pixel_half_size;/* 1 for half, 2 for float and uint32 */ 602 EXRChannel *channel; 603 int tmp_offset; 604 605 if (!td->bitmap) 606 td->bitmap = av_malloc(BITMAP_SIZE); 607 if (!td->lut) 608 td->lut = av_malloc(1 << 17); 609 if (!td->bitmap || !td->lut) { 610 av_freep(&td->bitmap); 611 av_freep(&td->lut); 612 return AVERROR(ENOMEM); 613 } 614 615 bytestream2_init(&gb, src, ssize); 616 min_non_zero = bytestream2_get_le16(&gb); 617 max_non_zero = bytestream2_get_le16(&gb); 618 619 if (max_non_zero >= BITMAP_SIZE) 620 return AVERROR_INVALIDDATA; 621 622 memset(td->bitmap, 0, FFMIN(min_non_zero, BITMAP_SIZE)); 623 if (min_non_zero <= max_non_zero) 624 bytestream2_get_buffer(&gb, td->bitmap + min_non_zero, 625 max_non_zero - min_non_zero + 1); 626 memset(td->bitmap + max_non_zero + 1, 0, BITMAP_SIZE - max_non_zero - 1); 627 628 maxval = reverse_lut(td->bitmap, td->lut); 629 630 bytestream2_skip(&gb, 4); 631 ret = huf_uncompress(s, td, &gb, tmp, dsize / sizeof(uint16_t)); 632 if (ret) 633 return ret; 634 635 ptr = tmp; 636 for (i = 0; i < s->nb_channels; i++) { 637 channel = &s->channels[i]; 638 639 if (channel->pixel_type == EXR_HALF) 640 pixel_half_size = 1; 641 else 642 pixel_half_size = 2; 643 644 for (j = 0; j < pixel_half_size; j++) 645 wav_decode(ptr + j, td->xsize, pixel_half_size, td->ysize, 646 td->xsize * pixel_half_size, maxval); 647 ptr += td->xsize * td->ysize * pixel_half_size; 648 } 649 650 apply_lut(td->lut, tmp, dsize / sizeof(uint16_t)); 651 652 out = (uint16_t *)td->uncompressed_data; 653 for (i = 0; i < td->ysize; i++) { 654 tmp_offset = 0; 655 for (j = 0; j < s->nb_channels; j++) { 656 channel = &s->channels[j]; 657 if (channel->pixel_type == EXR_HALF) 658 pixel_half_size = 1; 659 else 660 pixel_half_size = 2; 661 662 in = tmp + tmp_offset * td->xsize * td->ysize + i * td->xsize * pixel_half_size; 663 tmp_offset += pixel_half_size; 664 665#if HAVE_BIGENDIAN 666 s->bbdsp.bswap16_buf(out, in, td->xsize * pixel_half_size); 667#else 668 memcpy(out, in, td->xsize * 2 * pixel_half_size); 669#endif 670 out += td->xsize * pixel_half_size; 671 } 672 } 673 674 return 0; 675} 676 677static int pxr24_uncompress(EXRContext *s, const uint8_t *src, 678 int compressed_size, int uncompressed_size, 679 EXRThreadData *td) 680{ 681 unsigned long dest_len, expected_len = 0; 682 const uint8_t *in = td->tmp; 683 uint8_t *out; 684 int c, i, j; 685 686 for (i = 0; i < s->nb_channels; i++) { 687 if (s->channels[i].pixel_type == EXR_FLOAT) { 688 expected_len += (td->xsize * td->ysize * 3);/* PRX 24 store float in 24 bit instead of 32 */ 689 } else if (s->channels[i].pixel_type == EXR_HALF) { 690 expected_len += (td->xsize * td->ysize * 2); 691 } else {//UINT 32 692 expected_len += (td->xsize * td->ysize * 4); 693 } 694 } 695 696 dest_len = expected_len; 697 698 if (uncompress(td->tmp, &dest_len, src, compressed_size) != Z_OK) { 699 return AVERROR_INVALIDDATA; 700 } else if (dest_len != expected_len) { 701 return AVERROR_INVALIDDATA; 702 } 703 704 out = td->uncompressed_data; 705 for (i = 0; i < td->ysize; i++) 706 for (c = 0; c < s->nb_channels; c++) { 707 EXRChannel *channel = &s->channels[c]; 708 const uint8_t *ptr[4]; 709 uint32_t pixel = 0; 710 711 switch (channel->pixel_type) { 712 case EXR_FLOAT: 713 ptr[0] = in; 714 ptr[1] = ptr[0] + td->xsize; 715 ptr[2] = ptr[1] + td->xsize; 716 in = ptr[2] + td->xsize; 717 718 for (j = 0; j < td->xsize; ++j) { 719 uint32_t diff = ((unsigned)*(ptr[0]++) << 24) | 720 (*(ptr[1]++) << 16) | 721 (*(ptr[2]++) << 8); 722 pixel += diff; 723 bytestream_put_le32(&out, pixel); 724 } 725 break; 726 case EXR_HALF: 727 ptr[0] = in; 728 ptr[1] = ptr[0] + td->xsize; 729 in = ptr[1] + td->xsize; 730 for (j = 0; j < td->xsize; j++) { 731 uint32_t diff = (*(ptr[0]++) << 8) | *(ptr[1]++); 732 733 pixel += diff; 734 bytestream_put_le16(&out, pixel); 735 } 736 break; 737 case EXR_UINT: 738 ptr[0] = in; 739 ptr[1] = ptr[0] + s->xdelta; 740 ptr[2] = ptr[1] + s->xdelta; 741 ptr[3] = ptr[2] + s->xdelta; 742 in = ptr[3] + s->xdelta; 743 744 for (j = 0; j < s->xdelta; ++j) { 745 uint32_t diff = ((uint32_t)*(ptr[0]++) << 24) | 746 (*(ptr[1]++) << 16) | 747 (*(ptr[2]++) << 8 ) | 748 (*(ptr[3]++)); 749 pixel += diff; 750 bytestream_put_le32(&out, pixel); 751 } 752 break; 753 default: 754 return AVERROR_INVALIDDATA; 755 } 756 } 757 758 return 0; 759} 760 761static void unpack_14(const uint8_t b[14], uint16_t s[16]) 762{ 763 unsigned short shift = (b[ 2] >> 2) & 15; 764 unsigned short bias = (0x20 << shift); 765 int i; 766 767 s[ 0] = (b[0] << 8) | b[1]; 768 769 s[ 4] = s[ 0] + ((((b[ 2] << 4) | (b[ 3] >> 4)) & 0x3f) << shift) - bias; 770 s[ 8] = s[ 4] + ((((b[ 3] << 2) | (b[ 4] >> 6)) & 0x3f) << shift) - bias; 771 s[12] = s[ 8] + ((b[ 4] & 0x3f) << shift) - bias; 772 773 s[ 1] = s[ 0] + ((b[ 5] >> 2) << shift) - bias; 774 s[ 5] = s[ 4] + ((((b[ 5] << 4) | (b[ 6] >> 4)) & 0x3f) << shift) - bias; 775 s[ 9] = s[ 8] + ((((b[ 6] << 2) | (b[ 7] >> 6)) & 0x3f) << shift) - bias; 776 s[13] = s[12] + ((b[ 7] & 0x3f) << shift) - bias; 777 778 s[ 2] = s[ 1] + ((b[ 8] >> 2) << shift) - bias; 779 s[ 6] = s[ 5] + ((((b[ 8] << 4) | (b[ 9] >> 4)) & 0x3f) << shift) - bias; 780 s[10] = s[ 9] + ((((b[ 9] << 2) | (b[10] >> 6)) & 0x3f) << shift) - bias; 781 s[14] = s[13] + ((b[10] & 0x3f) << shift) - bias; 782 783 s[ 3] = s[ 2] + ((b[11] >> 2) << shift) - bias; 784 s[ 7] = s[ 6] + ((((b[11] << 4) | (b[12] >> 4)) & 0x3f) << shift) - bias; 785 s[11] = s[10] + ((((b[12] << 2) | (b[13] >> 6)) & 0x3f) << shift) - bias; 786 s[15] = s[14] + ((b[13] & 0x3f) << shift) - bias; 787 788 for (i = 0; i < 16; ++i) { 789 if (s[i] & 0x8000) 790 s[i] &= 0x7fff; 791 else 792 s[i] = ~s[i]; 793 } 794} 795 796static void unpack_3(const uint8_t b[3], uint16_t s[16]) 797{ 798 int i; 799 800 s[0] = (b[0] << 8) | b[1]; 801 802 if (s[0] & 0x8000) 803 s[0] &= 0x7fff; 804 else 805 s[0] = ~s[0]; 806 807 for (i = 1; i < 16; i++) 808 s[i] = s[0]; 809} 810 811 812static int b44_uncompress(EXRContext *s, const uint8_t *src, int compressed_size, 813 int uncompressed_size, EXRThreadData *td) { 814 const int8_t *sr = src; 815 int stay_to_uncompress = compressed_size; 816 int nb_b44_block_w, nb_b44_block_h; 817 int index_tl_x, index_tl_y, index_out, index_tmp; 818 uint16_t tmp_buffer[16]; /* B44 use 4x4 half float pixel */ 819 int c, iY, iX, y, x; 820 int target_channel_offset = 0; 821 822 /* calc B44 block count */ 823 nb_b44_block_w = td->xsize / 4; 824 if ((td->xsize % 4) != 0) 825 nb_b44_block_w++; 826 827 nb_b44_block_h = td->ysize / 4; 828 if ((td->ysize % 4) != 0) 829 nb_b44_block_h++; 830 831 for (c = 0; c < s->nb_channels; c++) { 832 if (s->channels[c].pixel_type == EXR_HALF) {/* B44 only compress half float data */ 833 for (iY = 0; iY < nb_b44_block_h; iY++) { 834 for (iX = 0; iX < nb_b44_block_w; iX++) {/* For each B44 block */ 835 if (stay_to_uncompress < 3) { 836 av_log(s, AV_LOG_ERROR, "Not enough data for B44A block: %d", stay_to_uncompress); 837 return AVERROR_INVALIDDATA; 838 } 839 840 if (src[compressed_size - stay_to_uncompress + 2] == 0xfc) { /* B44A block */ 841 unpack_3(sr, tmp_buffer); 842 sr += 3; 843 stay_to_uncompress -= 3; 844 } else {/* B44 Block */ 845 if (stay_to_uncompress < 14) { 846 av_log(s, AV_LOG_ERROR, "Not enough data for B44 block: %d", stay_to_uncompress); 847 return AVERROR_INVALIDDATA; 848 } 849 unpack_14(sr, tmp_buffer); 850 sr += 14; 851 stay_to_uncompress -= 14; 852 } 853 854 /* copy data to uncompress buffer (B44 block can exceed target resolution)*/ 855 index_tl_x = iX * 4; 856 index_tl_y = iY * 4; 857 858 for (y = index_tl_y; y < FFMIN(index_tl_y + 4, td->ysize); y++) { 859 for (x = index_tl_x; x < FFMIN(index_tl_x + 4, td->xsize); x++) { 860 index_out = target_channel_offset * td->xsize + y * td->channel_line_size + 2 * x; 861 index_tmp = (y-index_tl_y) * 4 + (x-index_tl_x); 862 td->uncompressed_data[index_out] = tmp_buffer[index_tmp] & 0xff; 863 td->uncompressed_data[index_out + 1] = tmp_buffer[index_tmp] >> 8; 864 } 865 } 866 } 867 } 868 target_channel_offset += 2; 869 } else {/* Float or UINT 32 channel */ 870 if (stay_to_uncompress < td->ysize * td->xsize * 4) { 871 av_log(s, AV_LOG_ERROR, "Not enough data for uncompress channel: %d", stay_to_uncompress); 872 return AVERROR_INVALIDDATA; 873 } 874 875 for (y = 0; y < td->ysize; y++) { 876 index_out = target_channel_offset * td->xsize + y * td->channel_line_size; 877 memcpy(&td->uncompressed_data[index_out], sr, td->xsize * 4); 878 sr += td->xsize * 4; 879 } 880 target_channel_offset += 4; 881 882 stay_to_uncompress -= td->ysize * td->xsize * 4; 883 } 884 } 885 886 return 0; 887} 888 889static int ac_uncompress(EXRContext *s, GetByteContext *gb, float *block) 890{ 891 int ret = 0, n = 1; 892 893 while (n < 64) { 894 uint16_t val = bytestream2_get_ne16(gb); 895 896 if (val == 0xff00) { 897 n = 64; 898 } else if ((val >> 8) == 0xff) { 899 n += val & 0xff; 900 } else { 901 ret = n; 902 block[ff_zigzag_direct[n]] = av_int2float(half2float(val, 903 s->mantissatable, 904 s->exponenttable, 905 s->offsettable)); 906 n++; 907 } 908 } 909 910 return ret; 911} 912 913static void idct_1d(float *blk, int step) 914{ 915 const float a = .5f * cosf( M_PI / 4.f); 916 const float b = .5f * cosf( M_PI / 16.f); 917 const float c = .5f * cosf( M_PI / 8.f); 918 const float d = .5f * cosf(3.f*M_PI / 16.f); 919 const float e = .5f * cosf(5.f*M_PI / 16.f); 920 const float f = .5f * cosf(3.f*M_PI / 8.f); 921 const float g = .5f * cosf(7.f*M_PI / 16.f); 922 923 float alpha[4], beta[4], theta[4], gamma[4]; 924 925 alpha[0] = c * blk[2 * step]; 926 alpha[1] = f * blk[2 * step]; 927 alpha[2] = c * blk[6 * step]; 928 alpha[3] = f * blk[6 * step]; 929 930 beta[0] = b * blk[1 * step] + d * blk[3 * step] + e * blk[5 * step] + g * blk[7 * step]; 931 beta[1] = d * blk[1 * step] - g * blk[3 * step] - b * blk[5 * step] - e * blk[7 * step]; 932 beta[2] = e * blk[1 * step] - b * blk[3 * step] + g * blk[5 * step] + d * blk[7 * step]; 933 beta[3] = g * blk[1 * step] - e * blk[3 * step] + d * blk[5 * step] - b * blk[7 * step]; 934 935 theta[0] = a * (blk[0 * step] + blk[4 * step]); 936 theta[3] = a * (blk[0 * step] - blk[4 * step]); 937 938 theta[1] = alpha[0] + alpha[3]; 939 theta[2] = alpha[1] - alpha[2]; 940 941 gamma[0] = theta[0] + theta[1]; 942 gamma[1] = theta[3] + theta[2]; 943 gamma[2] = theta[3] - theta[2]; 944 gamma[3] = theta[0] - theta[1]; 945 946 blk[0 * step] = gamma[0] + beta[0]; 947 blk[1 * step] = gamma[1] + beta[1]; 948 blk[2 * step] = gamma[2] + beta[2]; 949 blk[3 * step] = gamma[3] + beta[3]; 950 951 blk[4 * step] = gamma[3] - beta[3]; 952 blk[5 * step] = gamma[2] - beta[2]; 953 blk[6 * step] = gamma[1] - beta[1]; 954 blk[7 * step] = gamma[0] - beta[0]; 955} 956 957static void dct_inverse(float *block) 958{ 959 for (int i = 0; i < 8; i++) 960 idct_1d(block + i, 8); 961 962 for (int i = 0; i < 8; i++) { 963 idct_1d(block, 1); 964 block += 8; 965 } 966} 967 968static void convert(float y, float u, float v, 969 float *b, float *g, float *r) 970{ 971 *r = y + 1.5747f * v; 972 *g = y - 0.1873f * u - 0.4682f * v; 973 *b = y + 1.8556f * u; 974} 975 976static float to_linear(float x, float scale) 977{ 978 float ax = fabsf(x); 979 980 if (ax <= 1.f) { 981 return FFSIGN(x) * powf(ax, 2.2f * scale); 982 } else { 983 const float log_base = expf(2.2f * scale); 984 985 return FFSIGN(x) * powf(log_base, ax - 1.f); 986 } 987} 988 989static int dwa_uncompress(EXRContext *s, const uint8_t *src, int compressed_size, 990 int uncompressed_size, EXRThreadData *td) 991{ 992 int64_t version, lo_usize, lo_size; 993 int64_t ac_size, dc_size, rle_usize, rle_csize, rle_raw_size; 994 int64_t ac_count, dc_count, ac_compression; 995 const int dc_w = td->xsize >> 3; 996 const int dc_h = td->ysize >> 3; 997 GetByteContext gb, agb; 998 int skip, ret; 999 1000 if (compressed_size <= 88) 1001 return AVERROR_INVALIDDATA; 1002 1003 version = AV_RL64(src + 0); 1004 if (version != 2) 1005 return AVERROR_INVALIDDATA; 1006 1007 lo_usize = AV_RL64(src + 8); 1008 lo_size = AV_RL64(src + 16); 1009 ac_size = AV_RL64(src + 24); 1010 dc_size = AV_RL64(src + 32); 1011 rle_csize = AV_RL64(src + 40); 1012 rle_usize = AV_RL64(src + 48); 1013 rle_raw_size = AV_RL64(src + 56); 1014 ac_count = AV_RL64(src + 64); 1015 dc_count = AV_RL64(src + 72); 1016 ac_compression = AV_RL64(src + 80); 1017 1018 if ( compressed_size < (uint64_t)(lo_size | ac_size | dc_size | rle_csize) || compressed_size < 88LL + lo_size + ac_size + dc_size + rle_csize 1019 || ac_count > (uint64_t)INT_MAX/2 1020 ) 1021 return AVERROR_INVALIDDATA; 1022 1023 bytestream2_init(&gb, src + 88, compressed_size - 88); 1024 skip = bytestream2_get_le16(&gb); 1025 if (skip < 2) 1026 return AVERROR_INVALIDDATA; 1027 1028 bytestream2_skip(&gb, skip - 2); 1029 1030 if (lo_size > 0) { 1031 if (lo_usize > uncompressed_size) 1032 return AVERROR_INVALIDDATA; 1033 bytestream2_skip(&gb, lo_size); 1034 } 1035 1036 if (ac_size > 0) { 1037 unsigned long dest_len; 1038 GetByteContext agb = gb; 1039 1040 if (ac_count > 3LL * td->xsize * s->scan_lines_per_block) 1041 return AVERROR_INVALIDDATA; 1042 1043 dest_len = ac_count * 2LL; 1044 1045 av_fast_padded_malloc(&td->ac_data, &td->ac_size, dest_len); 1046 if (!td->ac_data) 1047 return AVERROR(ENOMEM); 1048 1049 switch (ac_compression) { 1050 case 0: 1051 ret = huf_uncompress(s, td, &agb, (int16_t *)td->ac_data, ac_count); 1052 if (ret < 0) 1053 return ret; 1054 break; 1055 case 1: 1056 if (uncompress(td->ac_data, &dest_len, agb.buffer, ac_size) != Z_OK || 1057 dest_len != ac_count * 2LL) 1058 return AVERROR_INVALIDDATA; 1059 break; 1060 default: 1061 return AVERROR_INVALIDDATA; 1062 } 1063 1064 bytestream2_skip(&gb, ac_size); 1065 } 1066 1067 { 1068 unsigned long dest_len; 1069 GetByteContext agb = gb; 1070 1071 if (dc_count != dc_w * dc_h * 3) 1072 return AVERROR_INVALIDDATA; 1073 1074 dest_len = dc_count * 2LL; 1075 1076 av_fast_padded_malloc(&td->dc_data, &td->dc_size, FFALIGN(dest_len, 64) * 2); 1077 if (!td->dc_data) 1078 return AVERROR(ENOMEM); 1079 1080 if (uncompress(td->dc_data + FFALIGN(dest_len, 64), &dest_len, agb.buffer, dc_size) != Z_OK || 1081 (dest_len != dc_count * 2LL)) 1082 return AVERROR_INVALIDDATA; 1083 1084 s->dsp.predictor(td->dc_data + FFALIGN(dest_len, 64), dest_len); 1085 s->dsp.reorder_pixels(td->dc_data, td->dc_data + FFALIGN(dest_len, 64), dest_len); 1086 1087 bytestream2_skip(&gb, dc_size); 1088 } 1089 1090 if (rle_raw_size > 0 && rle_csize > 0 && rle_usize > 0) { 1091 unsigned long dest_len = rle_usize; 1092 1093 av_fast_padded_malloc(&td->rle_data, &td->rle_size, rle_usize); 1094 if (!td->rle_data) 1095 return AVERROR(ENOMEM); 1096 1097 av_fast_padded_malloc(&td->rle_raw_data, &td->rle_raw_size, rle_raw_size); 1098 if (!td->rle_raw_data) 1099 return AVERROR(ENOMEM); 1100 1101 if (uncompress(td->rle_data, &dest_len, gb.buffer, rle_csize) != Z_OK || 1102 (dest_len != rle_usize)) 1103 return AVERROR_INVALIDDATA; 1104 1105 ret = rle(td->rle_raw_data, td->rle_data, rle_usize, rle_raw_size); 1106 if (ret < 0) 1107 return ret; 1108 bytestream2_skip(&gb, rle_csize); 1109 } 1110 1111 bytestream2_init(&agb, td->ac_data, ac_count * 2); 1112 1113 for (int y = 0; y < td->ysize; y += 8) { 1114 for (int x = 0; x < td->xsize; x += 8) { 1115 memset(td->block, 0, sizeof(td->block)); 1116 1117 for (int j = 0; j < 3; j++) { 1118 float *block = td->block[j]; 1119 const int idx = (x >> 3) + (y >> 3) * dc_w + dc_w * dc_h * j; 1120 uint16_t *dc = (uint16_t *)td->dc_data; 1121 union av_intfloat32 dc_val; 1122 1123 dc_val.i = half2float(dc[idx], s->mantissatable, 1124 s->exponenttable, s->offsettable); 1125 1126 block[0] = dc_val.f; 1127 ac_uncompress(s, &agb, block); 1128 dct_inverse(block); 1129 } 1130 1131 { 1132 const float scale = s->pixel_type == EXR_FLOAT ? 2.f : 1.f; 1133 const int o = s->nb_channels == 4; 1134 float *bo = ((float *)td->uncompressed_data) + 1135 y * td->xsize * s->nb_channels + td->xsize * (o + 0) + x; 1136 float *go = ((float *)td->uncompressed_data) + 1137 y * td->xsize * s->nb_channels + td->xsize * (o + 1) + x; 1138 float *ro = ((float *)td->uncompressed_data) + 1139 y * td->xsize * s->nb_channels + td->xsize * (o + 2) + x; 1140 float *yb = td->block[0]; 1141 float *ub = td->block[1]; 1142 float *vb = td->block[2]; 1143 1144 for (int yy = 0; yy < 8; yy++) { 1145 for (int xx = 0; xx < 8; xx++) { 1146 const int idx = xx + yy * 8; 1147 1148 convert(yb[idx], ub[idx], vb[idx], &bo[xx], &go[xx], &ro[xx]); 1149 1150 bo[xx] = to_linear(bo[xx], scale); 1151 go[xx] = to_linear(go[xx], scale); 1152 ro[xx] = to_linear(ro[xx], scale); 1153 } 1154 1155 bo += td->xsize * s->nb_channels; 1156 go += td->xsize * s->nb_channels; 1157 ro += td->xsize * s->nb_channels; 1158 } 1159 } 1160 } 1161 } 1162 1163 if (s->nb_channels < 4) 1164 return 0; 1165 1166 for (int y = 0; y < td->ysize && td->rle_raw_data; y++) { 1167 uint32_t *ao = ((uint32_t *)td->uncompressed_data) + y * td->xsize * s->nb_channels; 1168 uint8_t *ai0 = td->rle_raw_data + y * td->xsize; 1169 uint8_t *ai1 = td->rle_raw_data + y * td->xsize + rle_raw_size / 2; 1170 1171 for (int x = 0; x < td->xsize; x++) { 1172 uint16_t ha = ai0[x] | (ai1[x] << 8); 1173 1174 ao[x] = half2float(ha, s->mantissatable, s->exponenttable, s->offsettable); 1175 } 1176 } 1177 1178 return 0; 1179} 1180 1181static int decode_block(AVCodecContext *avctx, void *tdata, 1182 int jobnr, int threadnr) 1183{ 1184 EXRContext *s = avctx->priv_data; 1185 AVFrame *const p = s->picture; 1186 EXRThreadData *td = &s->thread_data[threadnr]; 1187 const uint8_t *channel_buffer[4] = { 0 }; 1188 const uint8_t *buf = s->buf; 1189 uint64_t line_offset, uncompressed_size; 1190 uint8_t *ptr; 1191 uint32_t data_size; 1192 int line, col = 0; 1193 uint64_t tile_x, tile_y, tile_level_x, tile_level_y; 1194 const uint8_t *src; 1195 int step = s->desc->flags & AV_PIX_FMT_FLAG_FLOAT ? 4 : 2 * s->desc->nb_components; 1196 int bxmin = 0, axmax = 0, window_xoffset = 0; 1197 int window_xmin, window_xmax, window_ymin, window_ymax; 1198 int data_xoffset, data_yoffset, data_window_offset, xsize, ysize; 1199 int i, x, buf_size = s->buf_size; 1200 int c, rgb_channel_count; 1201 float one_gamma = 1.0f / s->gamma; 1202 avpriv_trc_function trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type); 1203 int ret; 1204 1205 line_offset = AV_RL64(s->gb.buffer + jobnr * 8); 1206 1207 if (s->is_tile) { 1208 if (buf_size < 20 || line_offset > buf_size - 20) 1209 return AVERROR_INVALIDDATA; 1210 1211 src = buf + line_offset + 20; 1212 if (s->is_multipart) 1213 src += 4; 1214 1215 tile_x = AV_RL32(src - 20); 1216 tile_y = AV_RL32(src - 16); 1217 tile_level_x = AV_RL32(src - 12); 1218 tile_level_y = AV_RL32(src - 8); 1219 1220 data_size = AV_RL32(src - 4); 1221 if (data_size <= 0 || data_size > buf_size - line_offset - 20) 1222 return AVERROR_INVALIDDATA; 1223 1224 if (tile_level_x || tile_level_y) { /* tile level, is not the full res level */ 1225 avpriv_report_missing_feature(s->avctx, "Subres tile before full res tile"); 1226 return AVERROR_PATCHWELCOME; 1227 } 1228 1229 if (tile_x && s->tile_attr.xSize + (int64_t)FFMAX(s->xmin, 0) >= INT_MAX / tile_x ) 1230 return AVERROR_INVALIDDATA; 1231 if (tile_y && s->tile_attr.ySize + (int64_t)FFMAX(s->ymin, 0) >= INT_MAX / tile_y ) 1232 return AVERROR_INVALIDDATA; 1233 1234 line = s->ymin + s->tile_attr.ySize * tile_y; 1235 col = s->tile_attr.xSize * tile_x; 1236 1237 if (line < s->ymin || line > s->ymax || 1238 s->xmin + col < s->xmin || s->xmin + col > s->xmax) 1239 return AVERROR_INVALIDDATA; 1240 1241 td->ysize = FFMIN(s->tile_attr.ySize, s->ydelta - tile_y * s->tile_attr.ySize); 1242 td->xsize = FFMIN(s->tile_attr.xSize, s->xdelta - tile_x * s->tile_attr.xSize); 1243 1244 if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX || 1245 av_image_check_size2(td->xsize, td->ysize, s->avctx->max_pixels, AV_PIX_FMT_NONE, 0, s->avctx) < 0) 1246 return AVERROR_INVALIDDATA; 1247 1248 td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */ 1249 uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */ 1250 } else { 1251 if (buf_size < 8 || line_offset > buf_size - 8) 1252 return AVERROR_INVALIDDATA; 1253 1254 src = buf + line_offset + 8; 1255 if (s->is_multipart) 1256 src += 4; 1257 line = AV_RL32(src - 8); 1258 1259 if (line < s->ymin || line > s->ymax) 1260 return AVERROR_INVALIDDATA; 1261 1262 data_size = AV_RL32(src - 4); 1263 if (data_size <= 0 || data_size > buf_size - line_offset - 8) 1264 return AVERROR_INVALIDDATA; 1265 1266 td->ysize = FFMIN(s->scan_lines_per_block, s->ymax - line + 1); /* s->ydelta - line ?? */ 1267 td->xsize = s->xdelta; 1268 1269 if (td->xsize * (uint64_t)s->current_channel_offset > INT_MAX || 1270 av_image_check_size2(td->xsize, td->ysize, s->avctx->max_pixels, AV_PIX_FMT_NONE, 0, s->avctx) < 0) 1271 return AVERROR_INVALIDDATA; 1272 1273 td->channel_line_size = td->xsize * s->current_channel_offset;/* uncompress size of one line */ 1274 uncompressed_size = td->channel_line_size * (uint64_t)td->ysize;/* uncompress size of the block */ 1275 1276 if ((s->compression == EXR_RAW && (data_size != uncompressed_size || 1277 line_offset > buf_size - uncompressed_size)) || 1278 (s->compression != EXR_RAW && (data_size > uncompressed_size || 1279 line_offset > buf_size - data_size))) { 1280 return AVERROR_INVALIDDATA; 1281 } 1282 } 1283 1284 window_xmin = FFMIN(avctx->width, FFMAX(0, s->xmin + col)); 1285 window_xmax = FFMIN(avctx->width, FFMAX(0, s->xmin + col + td->xsize)); 1286 window_ymin = FFMIN(avctx->height, FFMAX(0, line )); 1287 window_ymax = FFMIN(avctx->height, FFMAX(0, line + td->ysize)); 1288 xsize = window_xmax - window_xmin; 1289 ysize = window_ymax - window_ymin; 1290 1291 /* tile or scanline not visible skip decoding */ 1292 if (xsize <= 0 || ysize <= 0) 1293 return 0; 1294 1295 /* is the first tile or is a scanline */ 1296 if(col == 0) { 1297 window_xmin = 0; 1298 /* pixels to add at the left of the display window */ 1299 window_xoffset = FFMAX(0, s->xmin); 1300 /* bytes to add at the left of the display window */ 1301 bxmin = window_xoffset * step; 1302 } 1303 1304 /* is the last tile or is a scanline */ 1305 if(col + td->xsize == s->xdelta) { 1306 window_xmax = avctx->width; 1307 /* bytes to add at the right of the display window */ 1308 axmax = FFMAX(0, (avctx->width - (s->xmax + 1))) * step; 1309 } 1310 1311 if (avctx->max_pixels && uncompressed_size > avctx->max_pixels * 16LL) 1312 return AVERROR_INVALIDDATA; 1313 1314 if (data_size < uncompressed_size || s->is_tile) { /* td->tmp is use for tile reorganization */ 1315 av_fast_padded_malloc(&td->tmp, &td->tmp_size, uncompressed_size); 1316 if (!td->tmp) 1317 return AVERROR(ENOMEM); 1318 } 1319 1320 if (data_size < uncompressed_size) { 1321 av_fast_padded_malloc(&td->uncompressed_data, 1322 &td->uncompressed_size, uncompressed_size + 64);/* Force 64 padding for AVX2 reorder_pixels dst */ 1323 1324 if (!td->uncompressed_data) 1325 return AVERROR(ENOMEM); 1326 1327 ret = AVERROR_INVALIDDATA; 1328 switch (s->compression) { 1329 case EXR_ZIP1: 1330 case EXR_ZIP16: 1331 ret = zip_uncompress(s, src, data_size, uncompressed_size, td); 1332 break; 1333 case EXR_PIZ: 1334 ret = piz_uncompress(s, src, data_size, uncompressed_size, td); 1335 break; 1336 case EXR_PXR24: 1337 ret = pxr24_uncompress(s, src, data_size, uncompressed_size, td); 1338 break; 1339 case EXR_RLE: 1340 ret = rle_uncompress(s, src, data_size, uncompressed_size, td); 1341 break; 1342 case EXR_B44: 1343 case EXR_B44A: 1344 ret = b44_uncompress(s, src, data_size, uncompressed_size, td); 1345 break; 1346 case EXR_DWAA: 1347 case EXR_DWAB: 1348 ret = dwa_uncompress(s, src, data_size, uncompressed_size, td); 1349 break; 1350 } 1351 if (ret < 0) { 1352 av_log(avctx, AV_LOG_ERROR, "decode_block() failed.\n"); 1353 return ret; 1354 } 1355 src = td->uncompressed_data; 1356 } 1357 1358 /* offsets to crop data outside display window */ 1359 data_xoffset = FFABS(FFMIN(0, s->xmin + col)) * (s->pixel_type == EXR_HALF ? 2 : 4); 1360 data_yoffset = FFABS(FFMIN(0, line)); 1361 data_window_offset = (data_yoffset * td->channel_line_size) + data_xoffset; 1362 1363 if (!s->is_luma) { 1364 channel_buffer[0] = src + (td->xsize * s->channel_offsets[0]) + data_window_offset; 1365 channel_buffer[1] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset; 1366 channel_buffer[2] = src + (td->xsize * s->channel_offsets[2]) + data_window_offset; 1367 rgb_channel_count = 3; 1368 } else { /* put y data in the first channel_buffer */ 1369 channel_buffer[0] = src + (td->xsize * s->channel_offsets[1]) + data_window_offset; 1370 rgb_channel_count = 1; 1371 } 1372 if (s->channel_offsets[3] >= 0) 1373 channel_buffer[3] = src + (td->xsize * s->channel_offsets[3]) + data_window_offset; 1374 1375 if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) { 1376 /* todo: change this when a floating point pixel format with luma with alpha is implemented */ 1377 int channel_count = s->channel_offsets[3] >= 0 ? 4 : rgb_channel_count; 1378 if (s->is_luma) { 1379 channel_buffer[1] = channel_buffer[0]; 1380 channel_buffer[2] = channel_buffer[0]; 1381 } 1382 1383 for (c = 0; c < channel_count; c++) { 1384 int plane = s->desc->comp[c].plane; 1385 ptr = p->data[plane] + window_ymin * p->linesize[plane] + (window_xmin * 4); 1386 1387 for (i = 0; i < ysize; i++, ptr += p->linesize[plane]) { 1388 const uint8_t *src; 1389 union av_intfloat32 *ptr_x; 1390 1391 src = channel_buffer[c]; 1392 ptr_x = (union av_intfloat32 *)ptr; 1393 1394 // Zero out the start if xmin is not 0 1395 memset(ptr_x, 0, bxmin); 1396 ptr_x += window_xoffset; 1397 1398 if (s->pixel_type == EXR_FLOAT || 1399 s->compression == EXR_DWAA || 1400 s->compression == EXR_DWAB) { 1401 // 32-bit 1402 union av_intfloat32 t; 1403 if (trc_func && c < 3) { 1404 for (x = 0; x < xsize; x++) { 1405 t.i = bytestream_get_le32(&src); 1406 t.f = trc_func(t.f); 1407 *ptr_x++ = t; 1408 } 1409 } else if (one_gamma != 1.f) { 1410 for (x = 0; x < xsize; x++) { 1411 t.i = bytestream_get_le32(&src); 1412 if (t.f > 0.0f && c < 3) /* avoid negative values */ 1413 t.f = powf(t.f, one_gamma); 1414 *ptr_x++ = t; 1415 } 1416 } else { 1417 for (x = 0; x < xsize; x++) { 1418 t.i = bytestream_get_le32(&src); 1419 *ptr_x++ = t; 1420 } 1421 } 1422 } else if (s->pixel_type == EXR_HALF) { 1423 // 16-bit 1424 if (c < 3 || !trc_func) { 1425 for (x = 0; x < xsize; x++) { 1426 *ptr_x++ = s->gamma_table[bytestream_get_le16(&src)]; 1427 } 1428 } else { 1429 for (x = 0; x < xsize; x++) { 1430 ptr_x[0].i = half2float(bytestream_get_le16(&src), 1431 s->mantissatable, 1432 s->exponenttable, 1433 s->offsettable); 1434 ptr_x++; 1435 } 1436 } 1437 } 1438 1439 // Zero out the end if xmax+1 is not w 1440 memset(ptr_x, 0, axmax); 1441 channel_buffer[c] += td->channel_line_size; 1442 } 1443 } 1444 } else { 1445 1446 av_assert1(s->pixel_type == EXR_UINT); 1447 ptr = p->data[0] + window_ymin * p->linesize[0] + (window_xmin * s->desc->nb_components * 2); 1448 1449 for (i = 0; i < ysize; i++, ptr += p->linesize[0]) { 1450 1451 const uint8_t * a; 1452 const uint8_t *rgb[3]; 1453 uint16_t *ptr_x; 1454 1455 for (c = 0; c < rgb_channel_count; c++) { 1456 rgb[c] = channel_buffer[c]; 1457 } 1458 1459 if (channel_buffer[3]) 1460 a = channel_buffer[3]; 1461 1462 ptr_x = (uint16_t *) ptr; 1463 1464 // Zero out the start if xmin is not 0 1465 memset(ptr_x, 0, bxmin); 1466 ptr_x += window_xoffset * s->desc->nb_components; 1467 1468 for (x = 0; x < xsize; x++) { 1469 for (c = 0; c < rgb_channel_count; c++) { 1470 *ptr_x++ = bytestream_get_le32(&rgb[c]) >> 16; 1471 } 1472 1473 if (channel_buffer[3]) 1474 *ptr_x++ = bytestream_get_le32(&a) >> 16; 1475 } 1476 1477 // Zero out the end if xmax+1 is not w 1478 memset(ptr_x, 0, axmax); 1479 1480 channel_buffer[0] += td->channel_line_size; 1481 channel_buffer[1] += td->channel_line_size; 1482 channel_buffer[2] += td->channel_line_size; 1483 if (channel_buffer[3]) 1484 channel_buffer[3] += td->channel_line_size; 1485 } 1486 } 1487 1488 return 0; 1489} 1490 1491static void skip_header_chunk(EXRContext *s) 1492{ 1493 GetByteContext *gb = &s->gb; 1494 1495 while (bytestream2_get_bytes_left(gb) > 0) { 1496 if (!bytestream2_peek_byte(gb)) 1497 break; 1498 1499 // Process unknown variables 1500 for (int i = 0; i < 2; i++) // value_name and value_type 1501 while (bytestream2_get_byte(gb) != 0); 1502 1503 // Skip variable length 1504 bytestream2_skip(gb, bytestream2_get_le32(gb)); 1505 } 1506} 1507 1508/** 1509 * Check if the variable name corresponds to its data type. 1510 * 1511 * @param s the EXRContext 1512 * @param value_name name of the variable to check 1513 * @param value_type type of the variable to check 1514 * @param minimum_length minimum length of the variable data 1515 * 1516 * @return bytes to read containing variable data 1517 * -1 if variable is not found 1518 * 0 if buffer ended prematurely 1519 */ 1520static int check_header_variable(EXRContext *s, 1521 const char *value_name, 1522 const char *value_type, 1523 unsigned int minimum_length) 1524{ 1525 GetByteContext *gb = &s->gb; 1526 int var_size = -1; 1527 1528 if (bytestream2_get_bytes_left(gb) >= minimum_length && 1529 !strcmp(gb->buffer, value_name)) { 1530 // found value_name, jump to value_type (null terminated strings) 1531 gb->buffer += strlen(value_name) + 1; 1532 if (!strcmp(gb->buffer, value_type)) { 1533 gb->buffer += strlen(value_type) + 1; 1534 var_size = bytestream2_get_le32(gb); 1535 // don't go read past boundaries 1536 if (var_size > bytestream2_get_bytes_left(gb)) 1537 var_size = 0; 1538 } else { 1539 // value_type not found, reset the buffer 1540 gb->buffer -= strlen(value_name) + 1; 1541 av_log(s->avctx, AV_LOG_WARNING, 1542 "Unknown data type %s for header variable %s.\n", 1543 value_type, value_name); 1544 } 1545 } 1546 1547 return var_size; 1548} 1549 1550static int decode_header(EXRContext *s, AVFrame *frame) 1551{ 1552 AVDictionary *metadata = NULL; 1553 GetByteContext *gb = &s->gb; 1554 int magic_number, version, flags; 1555 int layer_match = 0; 1556 int ret; 1557 int dup_channels = 0; 1558 1559 s->current_channel_offset = 0; 1560 s->xmin = ~0; 1561 s->xmax = ~0; 1562 s->ymin = ~0; 1563 s->ymax = ~0; 1564 s->xdelta = ~0; 1565 s->ydelta = ~0; 1566 s->channel_offsets[0] = -1; 1567 s->channel_offsets[1] = -1; 1568 s->channel_offsets[2] = -1; 1569 s->channel_offsets[3] = -1; 1570 s->pixel_type = EXR_UNKNOWN; 1571 s->compression = EXR_UNKN; 1572 s->nb_channels = 0; 1573 s->w = 0; 1574 s->h = 0; 1575 s->tile_attr.xSize = -1; 1576 s->tile_attr.ySize = -1; 1577 s->is_tile = 0; 1578 s->is_multipart = 0; 1579 s->is_luma = 0; 1580 s->current_part = 0; 1581 1582 if (bytestream2_get_bytes_left(gb) < 10) { 1583 av_log(s->avctx, AV_LOG_ERROR, "Header too short to parse.\n"); 1584 return AVERROR_INVALIDDATA; 1585 } 1586 1587 magic_number = bytestream2_get_le32(gb); 1588 if (magic_number != 20000630) { 1589 /* As per documentation of OpenEXR, it is supposed to be 1590 * int 20000630 little-endian */ 1591 av_log(s->avctx, AV_LOG_ERROR, "Wrong magic number %d.\n", magic_number); 1592 return AVERROR_INVALIDDATA; 1593 } 1594 1595 version = bytestream2_get_byte(gb); 1596 if (version != 2) { 1597 avpriv_report_missing_feature(s->avctx, "Version %d", version); 1598 return AVERROR_PATCHWELCOME; 1599 } 1600 1601 flags = bytestream2_get_le24(gb); 1602 1603 if (flags & 0x02) 1604 s->is_tile = 1; 1605 if (flags & 0x10) 1606 s->is_multipart = 1; 1607 if (flags & 0x08) { 1608 avpriv_report_missing_feature(s->avctx, "deep data"); 1609 return AVERROR_PATCHWELCOME; 1610 } 1611 1612 // Parse the header 1613 while (bytestream2_get_bytes_left(gb) > 0) { 1614 int var_size; 1615 1616 while (s->is_multipart && s->current_part < s->selected_part && 1617 bytestream2_get_bytes_left(gb) > 0) { 1618 if (bytestream2_peek_byte(gb)) { 1619 skip_header_chunk(s); 1620 } else { 1621 bytestream2_skip(gb, 1); 1622 if (!bytestream2_peek_byte(gb)) 1623 break; 1624 } 1625 bytestream2_skip(gb, 1); 1626 s->current_part++; 1627 } 1628 1629 if (!bytestream2_peek_byte(gb)) { 1630 if (!s->is_multipart) 1631 break; 1632 bytestream2_skip(gb, 1); 1633 if (s->current_part == s->selected_part) { 1634 while (bytestream2_get_bytes_left(gb) > 0) { 1635 if (bytestream2_peek_byte(gb)) { 1636 skip_header_chunk(s); 1637 } else { 1638 bytestream2_skip(gb, 1); 1639 if (!bytestream2_peek_byte(gb)) 1640 break; 1641 } 1642 } 1643 } 1644 if (!bytestream2_peek_byte(gb)) 1645 break; 1646 s->current_part++; 1647 } 1648 1649 if ((var_size = check_header_variable(s, "channels", 1650 "chlist", 38)) >= 0) { 1651 GetByteContext ch_gb; 1652 if (!var_size) { 1653 ret = AVERROR_INVALIDDATA; 1654 goto fail; 1655 } 1656 1657 bytestream2_init(&ch_gb, gb->buffer, var_size); 1658 1659 while (bytestream2_get_bytes_left(&ch_gb) >= 19) { 1660 EXRChannel *channel; 1661 enum ExrPixelType current_pixel_type; 1662 int channel_index = -1; 1663 int xsub, ysub; 1664 1665 if (strcmp(s->layer, "") != 0) { 1666 if (strncmp(ch_gb.buffer, s->layer, strlen(s->layer)) == 0) { 1667 layer_match = 1; 1668 av_log(s->avctx, AV_LOG_INFO, 1669 "Channel match layer : %s.\n", ch_gb.buffer); 1670 ch_gb.buffer += strlen(s->layer); 1671 if (*ch_gb.buffer == '.') 1672 ch_gb.buffer++; /* skip dot if not given */ 1673 } else { 1674 layer_match = 0; 1675 av_log(s->avctx, AV_LOG_INFO, 1676 "Channel doesn't match layer : %s.\n", ch_gb.buffer); 1677 } 1678 } else { 1679 layer_match = 1; 1680 } 1681 1682 if (layer_match) { /* only search channel if the layer match is valid */ 1683 if (!av_strcasecmp(ch_gb.buffer, "R") || 1684 !av_strcasecmp(ch_gb.buffer, "X") || 1685 !av_strcasecmp(ch_gb.buffer, "U")) { 1686 channel_index = 0; 1687 s->is_luma = 0; 1688 } else if (!av_strcasecmp(ch_gb.buffer, "G") || 1689 !av_strcasecmp(ch_gb.buffer, "V")) { 1690 channel_index = 1; 1691 s->is_luma = 0; 1692 } else if (!av_strcasecmp(ch_gb.buffer, "Y")) { 1693 channel_index = 1; 1694 s->is_luma = 1; 1695 } else if (!av_strcasecmp(ch_gb.buffer, "B") || 1696 !av_strcasecmp(ch_gb.buffer, "Z") || 1697 !av_strcasecmp(ch_gb.buffer, "W")) { 1698 channel_index = 2; 1699 s->is_luma = 0; 1700 } else if (!av_strcasecmp(ch_gb.buffer, "A")) { 1701 channel_index = 3; 1702 } else { 1703 av_log(s->avctx, AV_LOG_WARNING, 1704 "Unsupported channel %.256s.\n", ch_gb.buffer); 1705 } 1706 } 1707 1708 /* skip until you get a 0 */ 1709 while (bytestream2_get_bytes_left(&ch_gb) > 0 && 1710 bytestream2_get_byte(&ch_gb)) 1711 continue; 1712 1713 if (bytestream2_get_bytes_left(&ch_gb) < 4) { 1714 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header.\n"); 1715 ret = AVERROR_INVALIDDATA; 1716 goto fail; 1717 } 1718 1719 current_pixel_type = bytestream2_get_le32(&ch_gb); 1720 if (current_pixel_type >= EXR_UNKNOWN) { 1721 avpriv_report_missing_feature(s->avctx, "Pixel type %d", 1722 current_pixel_type); 1723 ret = AVERROR_PATCHWELCOME; 1724 goto fail; 1725 } 1726 1727 bytestream2_skip(&ch_gb, 4); 1728 xsub = bytestream2_get_le32(&ch_gb); 1729 ysub = bytestream2_get_le32(&ch_gb); 1730 1731 if (xsub != 1 || ysub != 1) { 1732 avpriv_report_missing_feature(s->avctx, 1733 "Subsampling %dx%d", 1734 xsub, ysub); 1735 ret = AVERROR_PATCHWELCOME; 1736 goto fail; 1737 } 1738 1739 if (channel_index >= 0 && s->channel_offsets[channel_index] == -1) { /* channel has not been previously assigned */ 1740 if (s->pixel_type != EXR_UNKNOWN && 1741 s->pixel_type != current_pixel_type) { 1742 av_log(s->avctx, AV_LOG_ERROR, 1743 "RGB channels not of the same depth.\n"); 1744 ret = AVERROR_INVALIDDATA; 1745 goto fail; 1746 } 1747 s->pixel_type = current_pixel_type; 1748 s->channel_offsets[channel_index] = s->current_channel_offset; 1749 } else if (channel_index >= 0) { 1750 av_log(s->avctx, AV_LOG_WARNING, 1751 "Multiple channels with index %d.\n", channel_index); 1752 if (++dup_channels > 10) { 1753 ret = AVERROR_INVALIDDATA; 1754 goto fail; 1755 } 1756 } 1757 1758 s->channels = av_realloc(s->channels, 1759 ++s->nb_channels * sizeof(EXRChannel)); 1760 if (!s->channels) { 1761 ret = AVERROR(ENOMEM); 1762 goto fail; 1763 } 1764 channel = &s->channels[s->nb_channels - 1]; 1765 channel->pixel_type = current_pixel_type; 1766 channel->xsub = xsub; 1767 channel->ysub = ysub; 1768 1769 if (current_pixel_type == EXR_HALF) { 1770 s->current_channel_offset += 2; 1771 } else {/* Float or UINT32 */ 1772 s->current_channel_offset += 4; 1773 } 1774 } 1775 1776 /* Check if all channels are set with an offset or if the channels 1777 * are causing an overflow */ 1778 if (!s->is_luma) {/* if we expected to have at least 3 channels */ 1779 if (FFMIN3(s->channel_offsets[0], 1780 s->channel_offsets[1], 1781 s->channel_offsets[2]) < 0) { 1782 if (s->channel_offsets[0] < 0) 1783 av_log(s->avctx, AV_LOG_ERROR, "Missing red channel.\n"); 1784 if (s->channel_offsets[1] < 0) 1785 av_log(s->avctx, AV_LOG_ERROR, "Missing green channel.\n"); 1786 if (s->channel_offsets[2] < 0) 1787 av_log(s->avctx, AV_LOG_ERROR, "Missing blue channel.\n"); 1788 ret = AVERROR_INVALIDDATA; 1789 goto fail; 1790 } 1791 } 1792 1793 // skip one last byte and update main gb 1794 gb->buffer = ch_gb.buffer + 1; 1795 continue; 1796 } else if ((var_size = check_header_variable(s, "dataWindow", "box2i", 1797 31)) >= 0) { 1798 int xmin, ymin, xmax, ymax; 1799 if (!var_size) { 1800 ret = AVERROR_INVALIDDATA; 1801 goto fail; 1802 } 1803 1804 xmin = bytestream2_get_le32(gb); 1805 ymin = bytestream2_get_le32(gb); 1806 xmax = bytestream2_get_le32(gb); 1807 ymax = bytestream2_get_le32(gb); 1808 1809 if (xmin > xmax || ymin > ymax || 1810 ymax == INT_MAX || xmax == INT_MAX || 1811 (unsigned)xmax - xmin >= INT_MAX || 1812 (unsigned)ymax - ymin >= INT_MAX) { 1813 ret = AVERROR_INVALIDDATA; 1814 goto fail; 1815 } 1816 s->xmin = xmin; 1817 s->xmax = xmax; 1818 s->ymin = ymin; 1819 s->ymax = ymax; 1820 s->xdelta = (s->xmax - s->xmin) + 1; 1821 s->ydelta = (s->ymax - s->ymin) + 1; 1822 1823 continue; 1824 } else if ((var_size = check_header_variable(s, "displayWindow", 1825 "box2i", 34)) >= 0) { 1826 int32_t sx, sy, dx, dy; 1827 1828 if (!var_size) { 1829 ret = AVERROR_INVALIDDATA; 1830 goto fail; 1831 } 1832 1833 sx = bytestream2_get_le32(gb); 1834 sy = bytestream2_get_le32(gb); 1835 dx = bytestream2_get_le32(gb); 1836 dy = bytestream2_get_le32(gb); 1837 1838 s->w = (unsigned)dx - sx + 1; 1839 s->h = (unsigned)dy - sy + 1; 1840 1841 continue; 1842 } else if ((var_size = check_header_variable(s, "lineOrder", 1843 "lineOrder", 25)) >= 0) { 1844 int line_order; 1845 if (!var_size) { 1846 ret = AVERROR_INVALIDDATA; 1847 goto fail; 1848 } 1849 1850 line_order = bytestream2_get_byte(gb); 1851 av_log(s->avctx, AV_LOG_DEBUG, "line order: %d.\n", line_order); 1852 if (line_order > 2) { 1853 av_log(s->avctx, AV_LOG_ERROR, "Unknown line order.\n"); 1854 ret = AVERROR_INVALIDDATA; 1855 goto fail; 1856 } 1857 1858 continue; 1859 } else if ((var_size = check_header_variable(s, "pixelAspectRatio", 1860 "float", 31)) >= 0) { 1861 if (!var_size) { 1862 ret = AVERROR_INVALIDDATA; 1863 goto fail; 1864 } 1865 1866 s->sar = bytestream2_get_le32(gb); 1867 1868 continue; 1869 } else if ((var_size = check_header_variable(s, "compression", 1870 "compression", 29)) >= 0) { 1871 if (!var_size) { 1872 ret = AVERROR_INVALIDDATA; 1873 goto fail; 1874 } 1875 1876 if (s->compression == EXR_UNKN) 1877 s->compression = bytestream2_get_byte(gb); 1878 else { 1879 bytestream2_skip(gb, 1); 1880 av_log(s->avctx, AV_LOG_WARNING, 1881 "Found more than one compression attribute.\n"); 1882 } 1883 1884 continue; 1885 } else if ((var_size = check_header_variable(s, "tiles", 1886 "tiledesc", 22)) >= 0) { 1887 char tileLevel; 1888 1889 if (!s->is_tile) 1890 av_log(s->avctx, AV_LOG_WARNING, 1891 "Found tile attribute and scanline flags. Exr will be interpreted as scanline.\n"); 1892 1893 s->tile_attr.xSize = bytestream2_get_le32(gb); 1894 s->tile_attr.ySize = bytestream2_get_le32(gb); 1895 1896 tileLevel = bytestream2_get_byte(gb); 1897 s->tile_attr.level_mode = tileLevel & 0x0f; 1898 s->tile_attr.level_round = (tileLevel >> 4) & 0x0f; 1899 1900 if (s->tile_attr.level_mode >= EXR_TILE_LEVEL_UNKNOWN) { 1901 avpriv_report_missing_feature(s->avctx, "Tile level mode %d", 1902 s->tile_attr.level_mode); 1903 ret = AVERROR_PATCHWELCOME; 1904 goto fail; 1905 } 1906 1907 if (s->tile_attr.level_round >= EXR_TILE_ROUND_UNKNOWN) { 1908 avpriv_report_missing_feature(s->avctx, "Tile level round %d", 1909 s->tile_attr.level_round); 1910 ret = AVERROR_PATCHWELCOME; 1911 goto fail; 1912 } 1913 1914 continue; 1915 } else if ((var_size = check_header_variable(s, "writer", 1916 "string", 1)) >= 0) { 1917 uint8_t key[256] = { 0 }; 1918 1919 bytestream2_get_buffer(gb, key, FFMIN(sizeof(key) - 1, var_size)); 1920 av_dict_set(&metadata, "writer", key, 0); 1921 1922 continue; 1923 } else if ((var_size = check_header_variable(s, "framesPerSecond", 1924 "rational", 33)) >= 0) { 1925 if (!var_size) { 1926 ret = AVERROR_INVALIDDATA; 1927 goto fail; 1928 } 1929 1930 s->avctx->framerate.num = bytestream2_get_le32(gb); 1931 s->avctx->framerate.den = bytestream2_get_le32(gb); 1932 1933 continue; 1934 } else if ((var_size = check_header_variable(s, "chunkCount", 1935 "int", 23)) >= 0) { 1936 1937 s->chunk_count = bytestream2_get_le32(gb); 1938 1939 continue; 1940 } else if ((var_size = check_header_variable(s, "type", 1941 "string", 16)) >= 0) { 1942 uint8_t key[256] = { 0 }; 1943 1944 bytestream2_get_buffer(gb, key, FFMIN(sizeof(key) - 1, var_size)); 1945 if (strncmp("scanlineimage", key, var_size) && 1946 strncmp("tiledimage", key, var_size)) { 1947 ret = AVERROR_PATCHWELCOME; 1948 goto fail; 1949 } 1950 1951 continue; 1952 } else if ((var_size = check_header_variable(s, "preview", 1953 "preview", 16)) >= 0) { 1954 uint32_t pw = bytestream2_get_le32(gb); 1955 uint32_t ph = bytestream2_get_le32(gb); 1956 uint64_t psize = pw * ph; 1957 if (psize > INT64_MAX / 4) { 1958 ret = AVERROR_INVALIDDATA; 1959 goto fail; 1960 } 1961 psize *= 4; 1962 1963 if ((int64_t)psize >= bytestream2_get_bytes_left(gb)) { 1964 ret = AVERROR_INVALIDDATA; 1965 goto fail; 1966 } 1967 1968 bytestream2_skip(gb, psize); 1969 1970 continue; 1971 } 1972 1973 // Check if there are enough bytes for a header 1974 if (bytestream2_get_bytes_left(gb) <= 9) { 1975 av_log(s->avctx, AV_LOG_ERROR, "Incomplete header\n"); 1976 ret = AVERROR_INVALIDDATA; 1977 goto fail; 1978 } 1979 1980 // Process unknown variables 1981 { 1982 uint8_t name[256] = { 0 }; 1983 uint8_t type[256] = { 0 }; 1984 uint8_t value[256] = { 0 }; 1985 int i = 0, size; 1986 1987 while (bytestream2_get_bytes_left(gb) > 0 && 1988 bytestream2_peek_byte(gb) && i < 255) { 1989 name[i++] = bytestream2_get_byte(gb); 1990 } 1991 1992 bytestream2_skip(gb, 1); 1993 i = 0; 1994 while (bytestream2_get_bytes_left(gb) > 0 && 1995 bytestream2_peek_byte(gb) && i < 255) { 1996 type[i++] = bytestream2_get_byte(gb); 1997 } 1998 bytestream2_skip(gb, 1); 1999 size = bytestream2_get_le32(gb); 2000 2001 bytestream2_get_buffer(gb, value, FFMIN(sizeof(value) - 1, size)); 2002 if (!strcmp(type, "string")) 2003 av_dict_set(&metadata, name, value, 0); 2004 } 2005 } 2006 2007 if (s->compression == EXR_UNKN) { 2008 av_log(s->avctx, AV_LOG_ERROR, "Missing compression attribute.\n"); 2009 ret = AVERROR_INVALIDDATA; 2010 goto fail; 2011 } 2012 2013 if (s->is_tile) { 2014 if (s->tile_attr.xSize < 1 || s->tile_attr.ySize < 1) { 2015 av_log(s->avctx, AV_LOG_ERROR, "Invalid tile attribute.\n"); 2016 ret = AVERROR_INVALIDDATA; 2017 goto fail; 2018 } 2019 } 2020 2021 if (bytestream2_get_bytes_left(gb) <= 0) { 2022 av_log(s->avctx, AV_LOG_ERROR, "Incomplete frame.\n"); 2023 ret = AVERROR_INVALIDDATA; 2024 goto fail; 2025 } 2026 2027 frame->metadata = metadata; 2028 2029 // aaand we are done 2030 bytestream2_skip(gb, 1); 2031 return 0; 2032fail: 2033 av_dict_free(&metadata); 2034 return ret; 2035} 2036 2037static int decode_frame(AVCodecContext *avctx, AVFrame *picture, 2038 int *got_frame, AVPacket *avpkt) 2039{ 2040 EXRContext *s = avctx->priv_data; 2041 GetByteContext *gb = &s->gb; 2042 uint8_t *ptr; 2043 2044 int i, y, ret, ymax; 2045 int planes; 2046 int out_line_size; 2047 int nb_blocks; /* nb scanline or nb tile */ 2048 uint64_t start_offset_table; 2049 uint64_t start_next_scanline; 2050 PutByteContext offset_table_writer; 2051 2052 bytestream2_init(gb, avpkt->data, avpkt->size); 2053 2054 if ((ret = decode_header(s, picture)) < 0) 2055 return ret; 2056 2057 if ((s->compression == EXR_DWAA || s->compression == EXR_DWAB) && 2058 s->pixel_type == EXR_HALF) { 2059 s->current_channel_offset *= 2; 2060 for (int i = 0; i < 4; i++) 2061 s->channel_offsets[i] *= 2; 2062 } 2063 2064 switch (s->pixel_type) { 2065 case EXR_FLOAT: 2066 case EXR_HALF: 2067 if (s->channel_offsets[3] >= 0) { 2068 if (!s->is_luma) { 2069 avctx->pix_fmt = AV_PIX_FMT_GBRAPF32; 2070 } else { 2071 /* todo: change this when a floating point pixel format with luma with alpha is implemented */ 2072 avctx->pix_fmt = AV_PIX_FMT_GBRAPF32; 2073 } 2074 } else { 2075 if (!s->is_luma) { 2076 avctx->pix_fmt = AV_PIX_FMT_GBRPF32; 2077 } else { 2078 avctx->pix_fmt = AV_PIX_FMT_GRAYF32; 2079 } 2080 } 2081 break; 2082 case EXR_UINT: 2083 if (s->channel_offsets[3] >= 0) { 2084 if (!s->is_luma) { 2085 avctx->pix_fmt = AV_PIX_FMT_RGBA64; 2086 } else { 2087 avctx->pix_fmt = AV_PIX_FMT_YA16; 2088 } 2089 } else { 2090 if (!s->is_luma) { 2091 avctx->pix_fmt = AV_PIX_FMT_RGB48; 2092 } else { 2093 avctx->pix_fmt = AV_PIX_FMT_GRAY16; 2094 } 2095 } 2096 break; 2097 default: 2098 av_log(avctx, AV_LOG_ERROR, "Missing channel list.\n"); 2099 return AVERROR_INVALIDDATA; 2100 } 2101 2102 if (s->apply_trc_type != AVCOL_TRC_UNSPECIFIED) 2103 avctx->color_trc = s->apply_trc_type; 2104 2105 switch (s->compression) { 2106 case EXR_RAW: 2107 case EXR_RLE: 2108 case EXR_ZIP1: 2109 s->scan_lines_per_block = 1; 2110 break; 2111 case EXR_PXR24: 2112 case EXR_ZIP16: 2113 s->scan_lines_per_block = 16; 2114 break; 2115 case EXR_PIZ: 2116 case EXR_B44: 2117 case EXR_B44A: 2118 case EXR_DWAA: 2119 s->scan_lines_per_block = 32; 2120 break; 2121 case EXR_DWAB: 2122 s->scan_lines_per_block = 256; 2123 break; 2124 default: 2125 avpriv_report_missing_feature(avctx, "Compression %d", s->compression); 2126 return AVERROR_PATCHWELCOME; 2127 } 2128 2129 /* Verify the xmin, xmax, ymin and ymax before setting the actual image size. 2130 * It's possible for the data window can larger or outside the display window */ 2131 if (s->xmin > s->xmax || s->ymin > s->ymax || 2132 s->ydelta == 0xFFFFFFFF || s->xdelta == 0xFFFFFFFF) { 2133 av_log(avctx, AV_LOG_ERROR, "Wrong or missing size information.\n"); 2134 return AVERROR_INVALIDDATA; 2135 } 2136 2137 if ((ret = ff_set_dimensions(avctx, s->w, s->h)) < 0) 2138 return ret; 2139 2140 ff_set_sar(s->avctx, av_d2q(av_int2float(s->sar), 255)); 2141 2142 s->desc = av_pix_fmt_desc_get(avctx->pix_fmt); 2143 if (!s->desc) 2144 return AVERROR_INVALIDDATA; 2145 2146 if (s->desc->flags & AV_PIX_FMT_FLAG_FLOAT) { 2147 planes = s->desc->nb_components; 2148 out_line_size = avctx->width * 4; 2149 } else { 2150 planes = 1; 2151 out_line_size = avctx->width * 2 * s->desc->nb_components; 2152 } 2153 2154 if (s->is_tile) { 2155 nb_blocks = ((s->xdelta + s->tile_attr.xSize - 1) / s->tile_attr.xSize) * 2156 ((s->ydelta + s->tile_attr.ySize - 1) / s->tile_attr.ySize); 2157 } else { /* scanline */ 2158 nb_blocks = (s->ydelta + s->scan_lines_per_block - 1) / 2159 s->scan_lines_per_block; 2160 } 2161 2162 if ((ret = ff_thread_get_buffer(avctx, picture, 0)) < 0) 2163 return ret; 2164 2165 if (bytestream2_get_bytes_left(gb)/8 < nb_blocks) 2166 return AVERROR_INVALIDDATA; 2167 2168 // check offset table and recreate it if need 2169 if (!s->is_tile && bytestream2_peek_le64(gb) == 0) { 2170 av_log(s->avctx, AV_LOG_DEBUG, "recreating invalid scanline offset table\n"); 2171 2172 start_offset_table = bytestream2_tell(gb); 2173 start_next_scanline = start_offset_table + nb_blocks * 8; 2174 bytestream2_init_writer(&offset_table_writer, &avpkt->data[start_offset_table], nb_blocks * 8); 2175 2176 for (y = 0; y < nb_blocks; y++) { 2177 /* write offset of prev scanline in offset table */ 2178 bytestream2_put_le64(&offset_table_writer, start_next_scanline); 2179 2180 /* get len of next scanline */ 2181 bytestream2_seek(gb, start_next_scanline + 4, SEEK_SET);/* skip line number */ 2182 start_next_scanline += (bytestream2_get_le32(gb) + 8); 2183 } 2184 bytestream2_seek(gb, start_offset_table, SEEK_SET); 2185 } 2186 2187 // save pointer we are going to use in decode_block 2188 s->buf = avpkt->data; 2189 s->buf_size = avpkt->size; 2190 2191 // Zero out the start if ymin is not 0 2192 for (i = 0; i < planes; i++) { 2193 ptr = picture->data[i]; 2194 for (y = 0; y < FFMIN(s->ymin, s->h); y++) { 2195 memset(ptr, 0, out_line_size); 2196 ptr += picture->linesize[i]; 2197 } 2198 } 2199 2200 s->picture = picture; 2201 2202 avctx->execute2(avctx, decode_block, s->thread_data, NULL, nb_blocks); 2203 2204 ymax = FFMAX(0, s->ymax + 1); 2205 // Zero out the end if ymax+1 is not h 2206 if (ymax < avctx->height) 2207 for (i = 0; i < planes; i++) { 2208 ptr = picture->data[i] + (ymax * picture->linesize[i]); 2209 for (y = ymax; y < avctx->height; y++) { 2210 memset(ptr, 0, out_line_size); 2211 ptr += picture->linesize[i]; 2212 } 2213 } 2214 2215 picture->pict_type = AV_PICTURE_TYPE_I; 2216 *got_frame = 1; 2217 2218 return avpkt->size; 2219} 2220 2221static av_cold int decode_init(AVCodecContext *avctx) 2222{ 2223 EXRContext *s = avctx->priv_data; 2224 uint32_t i; 2225 union av_intfloat32 t; 2226 float one_gamma = 1.0f / s->gamma; 2227 avpriv_trc_function trc_func = NULL; 2228 2229 half2float_table(s->mantissatable, s->exponenttable, s->offsettable); 2230 2231 s->avctx = avctx; 2232 2233 ff_exrdsp_init(&s->dsp); 2234 2235#if HAVE_BIGENDIAN 2236 ff_bswapdsp_init(&s->bbdsp); 2237#endif 2238 2239 trc_func = avpriv_get_trc_function_from_trc(s->apply_trc_type); 2240 if (trc_func) { 2241 for (i = 0; i < 65536; ++i) { 2242 t.i = half2float(i, s->mantissatable, s->exponenttable, s->offsettable); 2243 t.f = trc_func(t.f); 2244 s->gamma_table[i] = t; 2245 } 2246 } else { 2247 if (one_gamma > 0.9999f && one_gamma < 1.0001f) { 2248 for (i = 0; i < 65536; ++i) { 2249 s->gamma_table[i].i = half2float(i, s->mantissatable, s->exponenttable, s->offsettable); 2250 } 2251 } else { 2252 for (i = 0; i < 65536; ++i) { 2253 t.i = half2float(i, s->mantissatable, s->exponenttable, s->offsettable); 2254 /* If negative value we reuse half value */ 2255 if (t.f <= 0.0f) { 2256 s->gamma_table[i] = t; 2257 } else { 2258 t.f = powf(t.f, one_gamma); 2259 s->gamma_table[i] = t; 2260 } 2261 } 2262 } 2263 } 2264 2265 // allocate thread data, used for non EXR_RAW compression types 2266 s->thread_data = av_calloc(avctx->thread_count, sizeof(*s->thread_data)); 2267 if (!s->thread_data) 2268 return AVERROR(ENOMEM); 2269 2270 return 0; 2271} 2272 2273static av_cold int decode_end(AVCodecContext *avctx) 2274{ 2275 EXRContext *s = avctx->priv_data; 2276 int i; 2277 for (i = 0; i < avctx->thread_count; i++) { 2278 EXRThreadData *td = &s->thread_data[i]; 2279 av_freep(&td->uncompressed_data); 2280 av_freep(&td->tmp); 2281 av_freep(&td->bitmap); 2282 av_freep(&td->lut); 2283 av_freep(&td->he); 2284 av_freep(&td->freq); 2285 av_freep(&td->ac_data); 2286 av_freep(&td->dc_data); 2287 av_freep(&td->rle_data); 2288 av_freep(&td->rle_raw_data); 2289 ff_free_vlc(&td->vlc); 2290 } 2291 2292 av_freep(&s->thread_data); 2293 av_freep(&s->channels); 2294 2295 return 0; 2296} 2297 2298#define OFFSET(x) offsetof(EXRContext, x) 2299#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM 2300static const AVOption options[] = { 2301 { "layer", "Set the decoding layer", OFFSET(layer), 2302 AV_OPT_TYPE_STRING, { .str = "" }, 0, 0, VD }, 2303 { "part", "Set the decoding part", OFFSET(selected_part), 2304 AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VD }, 2305 { "gamma", "Set the float gamma value when decoding", OFFSET(gamma), 2306 AV_OPT_TYPE_FLOAT, { .dbl = 1.0f }, 0.001, FLT_MAX, VD }, 2307 2308 // XXX: Note the abuse of the enum using AVCOL_TRC_UNSPECIFIED to subsume the existing gamma option 2309 { "apply_trc", "color transfer characteristics to apply to EXR linear input", OFFSET(apply_trc_type), 2310 AV_OPT_TYPE_INT, {.i64 = AVCOL_TRC_UNSPECIFIED }, 1, AVCOL_TRC_NB-1, VD, "apply_trc_type"}, 2311 { "bt709", "BT.709", 0, 2312 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT709 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2313 { "gamma", "gamma", 0, 2314 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_UNSPECIFIED }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2315 { "gamma22", "BT.470 M", 0, 2316 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA22 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2317 { "gamma28", "BT.470 BG", 0, 2318 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_GAMMA28 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2319 { "smpte170m", "SMPTE 170 M", 0, 2320 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE170M }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2321 { "smpte240m", "SMPTE 240 M", 0, 2322 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTE240M }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2323 { "linear", "Linear", 0, 2324 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LINEAR }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2325 { "log", "Log", 0, 2326 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2327 { "log_sqrt", "Log square root", 0, 2328 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_LOG_SQRT }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2329 { "iec61966_2_4", "IEC 61966-2-4", 0, 2330 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_4 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2331 { "bt1361", "BT.1361", 0, 2332 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT1361_ECG }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2333 { "iec61966_2_1", "IEC 61966-2-1", 0, 2334 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_IEC61966_2_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2335 { "bt2020_10bit", "BT.2020 - 10 bit", 0, 2336 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_10 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2337 { "bt2020_12bit", "BT.2020 - 12 bit", 0, 2338 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_BT2020_12 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2339 { "smpte2084", "SMPTE ST 2084", 0, 2340 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST2084 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2341 { "smpte428_1", "SMPTE ST 428-1", 0, 2342 AV_OPT_TYPE_CONST, {.i64 = AVCOL_TRC_SMPTEST428_1 }, INT_MIN, INT_MAX, VD, "apply_trc_type"}, 2343 2344 { NULL }, 2345}; 2346 2347static const AVClass exr_class = { 2348 .class_name = "EXR", 2349 .item_name = av_default_item_name, 2350 .option = options, 2351 .version = LIBAVUTIL_VERSION_INT, 2352}; 2353 2354const FFCodec ff_exr_decoder = { 2355 .p.name = "exr", 2356 .p.long_name = NULL_IF_CONFIG_SMALL("OpenEXR image"), 2357 .p.type = AVMEDIA_TYPE_VIDEO, 2358 .p.id = AV_CODEC_ID_EXR, 2359 .priv_data_size = sizeof(EXRContext), 2360 .init = decode_init, 2361 .close = decode_end, 2362 FF_CODEC_DECODE_CB(decode_frame), 2363 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS | 2364 AV_CODEC_CAP_SLICE_THREADS, 2365 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, 2366 .p.priv_class = &exr_class, 2367}; 2368