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