summaryrefslogtreecommitdiff
path: root/libavcodec/tiff.c (plain)
blob: 3aaf63338d60040e833204d73407fd60f20ae345
1/*
2 * Copyright (c) 2006 Konstantin Shishkov
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21/**
22 * @file
23 * TIFF image decoder
24 * @author Konstantin Shishkov
25 */
26
27#include "config.h"
28#if CONFIG_ZLIB
29#include <zlib.h>
30#endif
31#if CONFIG_LZMA
32#define LZMA_API_STATIC
33#include <lzma.h>
34#endif
35
36#include "libavutil/attributes.h"
37#include "libavutil/avstring.h"
38#include "libavutil/intreadwrite.h"
39#include "libavutil/imgutils.h"
40#include "avcodec.h"
41#include "bytestream.h"
42#include "faxcompr.h"
43#include "internal.h"
44#include "lzw.h"
45#include "mathops.h"
46#include "tiff.h"
47#include "tiff_data.h"
48#include "thread.h"
49
50typedef struct TiffContext {
51 AVCodecContext *avctx;
52 GetByteContext gb;
53
54 int width, height;
55 unsigned int bpp, bppcount;
56 uint32_t palette[256];
57 int palette_is_set;
58 int le;
59 enum TiffCompr compr;
60 enum TiffPhotometric photometric;
61 int planar;
62 int subsampling[2];
63 int fax_opts;
64 int predictor;
65 int fill_order;
66 uint32_t res[4];
67
68 int strips, rps, sstype;
69 int sot;
70 int stripsizesoff, stripsize, stripoff, strippos;
71 LZWState *lzw;
72
73 uint8_t *deinvert_buf;
74 int deinvert_buf_size;
75 uint8_t *yuv_line;
76 unsigned int yuv_line_size;
77
78 int geotag_count;
79 TiffGeoTag *geotags;
80} TiffContext;
81
82static void free_geotags(TiffContext *const s)
83{
84 int i;
85 for (i = 0; i < s->geotag_count; i++) {
86 if (s->geotags[i].val)
87 av_freep(&s->geotags[i].val);
88 }
89 av_freep(&s->geotags);
90 s->geotag_count = 0;
91}
92
93#define RET_GEOKEY(TYPE, array, element)\
94 if (key >= TIFF_##TYPE##_KEY_ID_OFFSET &&\
95 key - TIFF_##TYPE##_KEY_ID_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_name_type_map))\
96 return ff_tiff_##array##_name_type_map[key - TIFF_##TYPE##_KEY_ID_OFFSET].element;
97
98static const char *get_geokey_name(int key)
99{
100 RET_GEOKEY(VERT, vert, name);
101 RET_GEOKEY(PROJ, proj, name);
102 RET_GEOKEY(GEOG, geog, name);
103 RET_GEOKEY(CONF, conf, name);
104
105 return NULL;
106}
107
108static int get_geokey_type(int key)
109{
110 RET_GEOKEY(VERT, vert, type);
111 RET_GEOKEY(PROJ, proj, type);
112 RET_GEOKEY(GEOG, geog, type);
113 RET_GEOKEY(CONF, conf, type);
114
115 return AVERROR_INVALIDDATA;
116}
117
118static int cmp_id_key(const void *id, const void *k)
119{
120 return *(const int*)id - ((const TiffGeoTagKeyName*)k)->key;
121}
122
123static const char *search_keyval(const TiffGeoTagKeyName *keys, int n, int id)
124{
125 TiffGeoTagKeyName *r = bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key);
126 if(r)
127 return r->name;
128
129 return NULL;
130}
131
132static char *get_geokey_val(int key, int val)
133{
134 char *ap;
135
136 if (val == TIFF_GEO_KEY_UNDEFINED)
137 return av_strdup("undefined");
138 if (val == TIFF_GEO_KEY_USER_DEFINED)
139 return av_strdup("User-Defined");
140
141#define RET_GEOKEY_VAL(TYPE, array)\
142 if (val >= TIFF_##TYPE##_OFFSET &&\
143 val - TIFF_##TYPE##_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_codes))\
144 return av_strdup(ff_tiff_##array##_codes[val - TIFF_##TYPE##_OFFSET]);
145
146 switch (key) {
147 case TIFF_GT_MODEL_TYPE_GEOKEY:
148 RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);
149 break;
150 case TIFF_GT_RASTER_TYPE_GEOKEY:
151 RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);
152 break;
153 case TIFF_GEOG_LINEAR_UNITS_GEOKEY:
154 case TIFF_PROJ_LINEAR_UNITS_GEOKEY:
155 case TIFF_VERTICAL_UNITS_GEOKEY:
156 RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);
157 break;
158 case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:
159 case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:
160 RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);
161 break;
162 case TIFF_GEOGRAPHIC_TYPE_GEOKEY:
163 RET_GEOKEY_VAL(GCS_TYPE, gcs_type);
164 RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);
165 break;
166 case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:
167 RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);
168 RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);
169 break;
170 case TIFF_GEOG_ELLIPSOID_GEOKEY:
171 RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);
172 break;
173 case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:
174 RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);
175 break;
176 case TIFF_PROJECTED_CS_TYPE_GEOKEY:
177 ap = av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val));
178 if(ap) return ap;
179 break;
180 case TIFF_PROJECTION_GEOKEY:
181 ap = av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val));
182 if(ap) return ap;
183 break;
184 case TIFF_PROJ_COORD_TRANS_GEOKEY:
185 RET_GEOKEY_VAL(COORD_TRANS, coord_trans);
186 break;
187 case TIFF_VERTICAL_CS_TYPE_GEOKEY:
188 RET_GEOKEY_VAL(VERT_CS, vert_cs);
189 RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);
190 break;
191
192 }
193
194 ap = av_malloc(14);
195 if (ap)
196 snprintf(ap, 14, "Unknown-%d", val);
197 return ap;
198}
199
200static char *doubles2str(double *dp, int count, const char *sep)
201{
202 int i;
203 char *ap, *ap0;
204 uint64_t component_len;
205 if (!sep) sep = ", ";
206 component_len = 24LL + strlen(sep);
207 if (count >= (INT_MAX - 1)/component_len)
208 return NULL;
209 ap = av_malloc(component_len * count + 1);
210 if (!ap)
211 return NULL;
212 ap0 = ap;
213 ap[0] = '\0';
214 for (i = 0; i < count; i++) {
215 unsigned l = snprintf(ap, component_len, "%.15g%s", dp[i], sep);
216 if(l >= component_len) {
217 av_free(ap0);
218 return NULL;
219 }
220 ap += l;
221 }
222 ap0[strlen(ap0) - strlen(sep)] = '\0';
223 return ap0;
224}
225
226static int add_metadata(int count, int type,
227 const char *name, const char *sep, TiffContext *s, AVFrame *frame)
228{
229 switch(type) {
230 case TIFF_DOUBLE: return ff_tadd_doubles_metadata(count, name, sep, &s->gb, s->le, avpriv_frame_get_metadatap(frame));
231 case TIFF_SHORT : return ff_tadd_shorts_metadata(count, name, sep, &s->gb, s->le, 0, avpriv_frame_get_metadatap(frame));
232 case TIFF_STRING: return ff_tadd_string_metadata(count, name, &s->gb, s->le, avpriv_frame_get_metadatap(frame));
233 default : return AVERROR_INVALIDDATA;
234 };
235}
236
237static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
238 int usePtr, const uint8_t *src,
239 uint8_t c, int width, int offset)
240{
241 switch (bpp) {
242 case 1:
243 while (--width >= 0) {
244 dst[(width+offset)*8+7] = (usePtr ? src[width] : c) & 0x1;
245 dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1;
246 dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1;
247 dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1;
248 dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1;
249 dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1;
250 dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1;
251 dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7;
252 }
253 break;
254 case 2:
255 while (--width >= 0) {
256 dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3;
257 dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3;
258 dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3;
259 dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6;
260 }
261 break;
262 case 4:
263 while (--width >= 0) {
264 dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF;
265 dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4;
266 }
267 break;
268 default:
269 if (usePtr) {
270 memcpy(dst + offset, src, width);
271 } else {
272 memset(dst + offset, c, width);
273 }
274 }
275}
276
277static int deinvert_buffer(TiffContext *s, const uint8_t *src, int size)
278{
279 int i;
280
281 av_fast_padded_malloc(&s->deinvert_buf, &s->deinvert_buf_size, size);
282 if (!s->deinvert_buf)
283 return AVERROR(ENOMEM);
284 for (i = 0; i < size; i++)
285 s->deinvert_buf[i] = ff_reverse[src[i]];
286
287 return 0;
288}
289
290static void unpack_yuv(TiffContext *s, AVFrame *p,
291 const uint8_t *src, int lnum)
292{
293 int i, j, k;
294 int w = (s->width - 1) / s->subsampling[0] + 1;
295 uint8_t *pu = &p->data[1][lnum / s->subsampling[1] * p->linesize[1]];
296 uint8_t *pv = &p->data[2][lnum / s->subsampling[1] * p->linesize[2]];
297 if (s->width % s->subsampling[0] || s->height % s->subsampling[1]) {
298 for (i = 0; i < w; i++) {
299 for (j = 0; j < s->subsampling[1]; j++)
300 for (k = 0; k < s->subsampling[0]; k++)
301 p->data[0][FFMIN(lnum + j, s->height-1) * p->linesize[0] +
302 FFMIN(i * s->subsampling[0] + k, s->width-1)] = *src++;
303 *pu++ = *src++;
304 *pv++ = *src++;
305 }
306 }else{
307 for (i = 0; i < w; i++) {
308 for (j = 0; j < s->subsampling[1]; j++)
309 for (k = 0; k < s->subsampling[0]; k++)
310 p->data[0][(lnum + j) * p->linesize[0] +
311 i * s->subsampling[0] + k] = *src++;
312 *pu++ = *src++;
313 *pv++ = *src++;
314 }
315 }
316}
317
318#if CONFIG_ZLIB
319static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src,
320 int size)
321{
322 z_stream zstream = { 0 };
323 int zret;
324
325 zstream.next_in = (uint8_t *)src;
326 zstream.avail_in = size;
327 zstream.next_out = dst;
328 zstream.avail_out = *len;
329 zret = inflateInit(&zstream);
330 if (zret != Z_OK) {
331 av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
332 return zret;
333 }
334 zret = inflate(&zstream, Z_SYNC_FLUSH);
335 inflateEnd(&zstream);
336 *len = zstream.total_out;
337 return zret == Z_STREAM_END ? Z_OK : zret;
338}
339
340static int tiff_unpack_zlib(TiffContext *s, AVFrame *p, uint8_t *dst, int stride,
341 const uint8_t *src, int size, int width, int lines,
342 int strip_start, int is_yuv)
343{
344 uint8_t *zbuf;
345 unsigned long outlen;
346 int ret, line;
347 outlen = width * lines;
348 zbuf = av_malloc(outlen);
349 if (!zbuf)
350 return AVERROR(ENOMEM);
351 if (s->fill_order) {
352 if ((ret = deinvert_buffer(s, src, size)) < 0) {
353 av_free(zbuf);
354 return ret;
355 }
356 src = s->deinvert_buf;
357 }
358 ret = tiff_uncompress(zbuf, &outlen, src, size);
359 if (ret != Z_OK) {
360 av_log(s->avctx, AV_LOG_ERROR,
361 "Uncompressing failed (%lu of %lu) with error %d\n", outlen,
362 (unsigned long)width * lines, ret);
363 av_free(zbuf);
364 return AVERROR_UNKNOWN;
365 }
366 src = zbuf;
367 for (line = 0; line < lines; line++) {
368 if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
369 horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);
370 } else {
371 memcpy(dst, src, width);
372 }
373 if (is_yuv) {
374 unpack_yuv(s, p, dst, strip_start + line);
375 line += s->subsampling[1] - 1;
376 }
377 dst += stride;
378 src += width;
379 }
380 av_free(zbuf);
381 return 0;
382}
383#endif
384
385#if CONFIG_LZMA
386static int tiff_uncompress_lzma(uint8_t *dst, uint64_t *len, const uint8_t *src,
387 int size)
388{
389 lzma_stream stream = LZMA_STREAM_INIT;
390 lzma_ret ret;
391
392 stream.next_in = (uint8_t *)src;
393 stream.avail_in = size;
394 stream.next_out = dst;
395 stream.avail_out = *len;
396 ret = lzma_stream_decoder(&stream, UINT64_MAX, 0);
397 if (ret != LZMA_OK) {
398 av_log(NULL, AV_LOG_ERROR, "LZMA init error: %d\n", ret);
399 return ret;
400 }
401 ret = lzma_code(&stream, LZMA_RUN);
402 lzma_end(&stream);
403 *len = stream.total_out;
404 return ret == LZMA_STREAM_END ? LZMA_OK : ret;
405}
406
407static int tiff_unpack_lzma(TiffContext *s, AVFrame *p, uint8_t *dst, int stride,
408 const uint8_t *src, int size, int width, int lines,
409 int strip_start, int is_yuv)
410{
411 uint64_t outlen = width * (uint64_t)lines;
412 int ret, line;
413 uint8_t *buf = av_malloc(outlen);
414 if (!buf)
415 return AVERROR(ENOMEM);
416 if (s->fill_order) {
417 if ((ret = deinvert_buffer(s, src, size)) < 0) {
418 av_free(buf);
419 return ret;
420 }
421 src = s->deinvert_buf;
422 }
423 ret = tiff_uncompress_lzma(buf, &outlen, src, size);
424 if (ret != LZMA_OK) {
425 av_log(s->avctx, AV_LOG_ERROR,
426 "Uncompressing failed (%"PRIu64" of %"PRIu64") with error %d\n", outlen,
427 (uint64_t)width * lines, ret);
428 av_free(buf);
429 return AVERROR_UNKNOWN;
430 }
431 src = buf;
432 for (line = 0; line < lines; line++) {
433 if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
434 horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);
435 } else {
436 memcpy(dst, src, width);
437 }
438 if (is_yuv) {
439 unpack_yuv(s, p, dst, strip_start + line);
440 line += s->subsampling[1] - 1;
441 }
442 dst += stride;
443 src += width;
444 }
445 av_free(buf);
446 return 0;
447}
448#endif
449
450static int tiff_unpack_fax(TiffContext *s, uint8_t *dst, int stride,
451 const uint8_t *src, int size, int width, int lines)
452{
453 int i, ret = 0;
454 int line;
455 uint8_t *src2 = av_malloc((unsigned)size +
456 AV_INPUT_BUFFER_PADDING_SIZE);
457
458 if (!src2) {
459 av_log(s->avctx, AV_LOG_ERROR,
460 "Error allocating temporary buffer\n");
461 return AVERROR(ENOMEM);
462 }
463
464 if (!s->fill_order) {
465 memcpy(src2, src, size);
466 } else {
467 for (i = 0; i < size; i++)
468 src2[i] = ff_reverse[src[i]];
469 }
470 memset(src2 + size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
471 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride,
472 s->compr, s->fax_opts);
473 if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
474 for (line = 0; line < lines; line++) {
475 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
476 dst += stride;
477 }
478 av_free(src2);
479 return ret;
480}
481
482static int tiff_unpack_strip(TiffContext *s, AVFrame *p, uint8_t *dst, int stride,
483 const uint8_t *src, int size, int strip_start, int lines)
484{
485 PutByteContext pb;
486 int c, line, pixels, code, ret;
487 const uint8_t *ssrc = src;
488 int width = ((s->width * s->bpp) + 7) >> 3;
489 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(p->format);
490 int is_yuv = !(desc->flags & AV_PIX_FMT_FLAG_RGB) &&
491 (desc->flags & AV_PIX_FMT_FLAG_PLANAR) &&
492 desc->nb_components >= 3;
493
494 if (s->planar)
495 width /= s->bppcount;
496
497 if (size <= 0)
498 return AVERROR_INVALIDDATA;
499
500 if (is_yuv) {
501 int bytes_per_row = (((s->width - 1) / s->subsampling[0] + 1) * s->bpp *
502 s->subsampling[0] * s->subsampling[1] + 7) >> 3;
503 av_fast_padded_malloc(&s->yuv_line, &s->yuv_line_size, bytes_per_row);
504 if (s->yuv_line == NULL) {
505 av_log(s->avctx, AV_LOG_ERROR, "Not enough memory\n");
506 return AVERROR(ENOMEM);
507 }
508 dst = s->yuv_line;
509 stride = 0;
510
511 width = (s->width - 1) / s->subsampling[0] + 1;
512 width = width * s->subsampling[0] * s->subsampling[1] + 2*width;
513 av_assert0(width <= bytes_per_row);
514 av_assert0(s->bpp == 24);
515 }
516
517 if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
518#if CONFIG_ZLIB
519 return tiff_unpack_zlib(s, p, dst, stride, src, size, width, lines,
520 strip_start, is_yuv);
521#else
522 av_log(s->avctx, AV_LOG_ERROR,
523 "zlib support not enabled, "
524 "deflate compression not supported\n");
525 return AVERROR(ENOSYS);
526#endif
527 }
528 if (s->compr == TIFF_LZMA) {
529#if CONFIG_LZMA
530 return tiff_unpack_lzma(s, p, dst, stride, src, size, width, lines,
531 strip_start, is_yuv);
532#else
533 av_log(s->avctx, AV_LOG_ERROR,
534 "LZMA support not enabled\n");
535 return AVERROR(ENOSYS);
536#endif
537 }
538 if (s->compr == TIFF_LZW) {
539 if (s->fill_order) {
540 if ((ret = deinvert_buffer(s, src, size)) < 0)
541 return ret;
542 ssrc = src = s->deinvert_buf;
543 }
544 if (size > 1 && !src[0] && (src[1]&1)) {
545 av_log(s->avctx, AV_LOG_ERROR, "Old style LZW is unsupported\n");
546 }
547 if ((ret = ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF)) < 0) {
548 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
549 return ret;
550 }
551 for (line = 0; line < lines; line++) {
552 pixels = ff_lzw_decode(s->lzw, dst, width);
553 if (pixels < width) {
554 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n",
555 pixels, width);
556 return AVERROR_INVALIDDATA;
557 }
558 if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
559 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
560 if (is_yuv) {
561 unpack_yuv(s, p, dst, strip_start + line);
562 line += s->subsampling[1] - 1;
563 }
564 dst += stride;
565 }
566 return 0;
567 }
568 if (s->compr == TIFF_CCITT_RLE ||
569 s->compr == TIFF_G3 ||
570 s->compr == TIFF_G4) {
571 if (is_yuv)
572 return AVERROR_INVALIDDATA;
573
574 return tiff_unpack_fax(s, dst, stride, src, size, width, lines);
575 }
576
577 bytestream2_init(&s->gb, src, size);
578 bytestream2_init_writer(&pb, dst, is_yuv ? s->yuv_line_size : (stride * lines));
579
580 for (line = 0; line < lines; line++) {
581 if (src - ssrc > size) {
582 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
583 return AVERROR_INVALIDDATA;
584 }
585
586 if (bytestream2_get_bytes_left(&s->gb) == 0 || bytestream2_get_eof(&pb))
587 break;
588 bytestream2_seek_p(&pb, stride * line, SEEK_SET);
589 switch (s->compr) {
590 case TIFF_RAW:
591 if (ssrc + size - src < width)
592 return AVERROR_INVALIDDATA;
593
594 if (!s->fill_order) {
595 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
596 dst, 1, src, 0, width, 0);
597 } else {
598 int i;
599 for (i = 0; i < width; i++)
600 dst[i] = ff_reverse[src[i]];
601 }
602 src += width;
603 break;
604 case TIFF_PACKBITS:
605 for (pixels = 0; pixels < width;) {
606 if (ssrc + size - src < 2) {
607 av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
608 return AVERROR_INVALIDDATA;
609 }
610 code = s->fill_order ? (int8_t) ff_reverse[*src++]: (int8_t) *src++;
611 if (code >= 0) {
612 code++;
613 if (pixels + code > width ||
614 ssrc + size - src < code) {
615 av_log(s->avctx, AV_LOG_ERROR,
616 "Copy went out of bounds\n");
617 return AVERROR_INVALIDDATA;
618 }
619 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
620 dst, 1, src, 0, code, pixels);
621 src += code;
622 pixels += code;
623 } else if (code != -128) { // -127..-1
624 code = (-code) + 1;
625 if (pixels + code > width) {
626 av_log(s->avctx, AV_LOG_ERROR,
627 "Run went out of bounds\n");
628 return AVERROR_INVALIDDATA;
629 }
630 c = *src++;
631 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
632 dst, 0, NULL, c, code, pixels);
633 pixels += code;
634 }
635 }
636 if (s->fill_order) {
637 int i;
638 for (i = 0; i < width; i++)
639 dst[i] = ff_reverse[dst[i]];
640 }
641 break;
642 }
643 if (is_yuv) {
644 unpack_yuv(s, p, dst, strip_start + line);
645 line += s->subsampling[1] - 1;
646 }
647 dst += stride;
648 }
649 return 0;
650}
651
652static int init_image(TiffContext *s, ThreadFrame *frame)
653{
654 int ret;
655 int create_gray_palette = 0;
656
657 // make sure there is no aliasing in the following switch
658 if (s->bpp >= 100 || s->bppcount >= 10) {
659 av_log(s->avctx, AV_LOG_ERROR,
660 "Unsupported image parameters: bpp=%d, bppcount=%d\n",
661 s->bpp, s->bppcount);
662 return AVERROR_INVALIDDATA;
663 }
664
665 switch (s->planar * 1000 + s->bpp * 10 + s->bppcount) {
666 case 11:
667 if (!s->palette_is_set) {
668 s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
669 break;
670 }
671 case 21:
672 case 41:
673 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
674 if (!s->palette_is_set) {
675 create_gray_palette = 1;
676 }
677 break;
678 case 81:
679 s->avctx->pix_fmt = s->palette_is_set ? AV_PIX_FMT_PAL8 : AV_PIX_FMT_GRAY8;
680 break;
681 case 243:
682 if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {
683 if (s->subsampling[0] == 1 && s->subsampling[1] == 1) {
684 s->avctx->pix_fmt = AV_PIX_FMT_YUV444P;
685 } else if (s->subsampling[0] == 2 && s->subsampling[1] == 1) {
686 s->avctx->pix_fmt = AV_PIX_FMT_YUV422P;
687 } else if (s->subsampling[0] == 4 && s->subsampling[1] == 1) {
688 s->avctx->pix_fmt = AV_PIX_FMT_YUV411P;
689 } else if (s->subsampling[0] == 1 && s->subsampling[1] == 2) {
690 s->avctx->pix_fmt = AV_PIX_FMT_YUV440P;
691 } else if (s->subsampling[0] == 2 && s->subsampling[1] == 2) {
692 s->avctx->pix_fmt = AV_PIX_FMT_YUV420P;
693 } else if (s->subsampling[0] == 4 && s->subsampling[1] == 4) {
694 s->avctx->pix_fmt = AV_PIX_FMT_YUV410P;
695 } else {
696 av_log(s->avctx, AV_LOG_ERROR, "Unsupported YCbCr subsampling\n");
697 return AVERROR_PATCHWELCOME;
698 }
699 } else
700 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
701 break;
702 case 161:
703 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE;
704 break;
705 case 162:
706 s->avctx->pix_fmt = AV_PIX_FMT_YA8;
707 break;
708 case 322:
709 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_YA16LE : AV_PIX_FMT_YA16BE;
710 break;
711 case 324:
712 s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
713 break;
714 case 483:
715 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE;
716 break;
717 case 644:
718 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE;
719 break;
720 case 1243:
721 s->avctx->pix_fmt = AV_PIX_FMT_GBRP;
722 break;
723 case 1324:
724 s->avctx->pix_fmt = AV_PIX_FMT_GBRAP;
725 break;
726 case 1483:
727 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRP16LE : AV_PIX_FMT_GBRP16BE;
728 break;
729 case 1644:
730 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GBRAP16LE : AV_PIX_FMT_GBRAP16BE;
731 break;
732 default:
733 av_log(s->avctx, AV_LOG_ERROR,
734 "This format is not supported (bpp=%d, bppcount=%d)\n",
735 s->bpp, s->bppcount);
736 return AVERROR_INVALIDDATA;
737 }
738
739 if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {
740 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(s->avctx->pix_fmt);
741 if((desc->flags & AV_PIX_FMT_FLAG_RGB) ||
742 !(desc->flags & AV_PIX_FMT_FLAG_PLANAR) ||
743 desc->nb_components < 3) {
744 av_log(s->avctx, AV_LOG_ERROR, "Unsupported YCbCr variant\n");
745 return AVERROR_INVALIDDATA;
746 }
747 }
748
749 if (s->width != s->avctx->width || s->height != s->avctx->height) {
750 ret = ff_set_dimensions(s->avctx, s->width, s->height);
751 if (ret < 0)
752 return ret;
753 }
754 if ((ret = ff_thread_get_buffer(s->avctx, frame, 0)) < 0)
755 return ret;
756 if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
757 if (!create_gray_palette)
758 memcpy(frame->f->data[1], s->palette, sizeof(s->palette));
759 else {
760 /* make default grayscale pal */
761 int i;
762 uint32_t *pal = (uint32_t *)frame->f->data[1];
763 for (i = 0; i < 1<<s->bpp; i++)
764 pal[i] = 0xFFU << 24 | i * 255 / ((1<<s->bpp) - 1) * 0x010101;
765 }
766 }
767 return 0;
768}
769
770static void set_sar(TiffContext *s, unsigned tag, unsigned num, unsigned den)
771{
772 int offset = tag == TIFF_YRES ? 2 : 0;
773 s->res[offset++] = num;
774 s->res[offset] = den;
775 if (s->res[0] && s->res[1] && s->res[2] && s->res[3]) {
776 uint64_t num = s->res[2] * (uint64_t)s->res[1];
777 uint64_t den = s->res[0] * (uint64_t)s->res[3];
778 if (num > INT64_MAX || den > INT64_MAX) {
779 num = num >> 1;
780 den = den >> 1;
781 }
782 av_reduce(&s->avctx->sample_aspect_ratio.num, &s->avctx->sample_aspect_ratio.den,
783 num, den, INT32_MAX);
784 if (!s->avctx->sample_aspect_ratio.den)
785 s->avctx->sample_aspect_ratio = (AVRational) {0, 1};
786 }
787}
788
789static int tiff_decode_tag(TiffContext *s, AVFrame *frame)
790{
791 unsigned tag, type, count, off, value = 0, value2 = 0;
792 int i, start;
793 int pos;
794 int ret;
795 double *dp;
796
797 ret = ff_tread_tag(&s->gb, s->le, &tag, &type, &count, &start);
798 if (ret < 0) {
799 goto end;
800 }
801
802 off = bytestream2_tell(&s->gb);
803 if (count == 1) {
804 switch (type) {
805 case TIFF_BYTE:
806 case TIFF_SHORT:
807 case TIFF_LONG:
808 value = ff_tget(&s->gb, type, s->le);
809 break;
810 case TIFF_RATIONAL:
811 value = ff_tget(&s->gb, TIFF_LONG, s->le);
812 value2 = ff_tget(&s->gb, TIFF_LONG, s->le);
813 break;
814 case TIFF_STRING:
815 if (count <= 4) {
816 break;
817 }
818 default:
819 value = UINT_MAX;
820 }
821 }
822
823 switch (tag) {
824 case TIFF_WIDTH:
825 s->width = value;
826 break;
827 case TIFF_HEIGHT:
828 s->height = value;
829 break;
830 case TIFF_BPP:
831 if (count > 4U) {
832 av_log(s->avctx, AV_LOG_ERROR,
833 "This format is not supported (bpp=%d, %d components)\n",
834 value, count);
835 return AVERROR_INVALIDDATA;
836 }
837 s->bppcount = count;
838 if (count == 1)
839 s->bpp = value;
840 else {
841 switch (type) {
842 case TIFF_BYTE:
843 case TIFF_SHORT:
844 case TIFF_LONG:
845 s->bpp = 0;
846 if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count)
847 return AVERROR_INVALIDDATA;
848 for (i = 0; i < count; i++)
849 s->bpp += ff_tget(&s->gb, type, s->le);
850 break;
851 default:
852 s->bpp = -1;
853 }
854 }
855 break;
856 case TIFF_SAMPLES_PER_PIXEL:
857 if (count != 1) {
858 av_log(s->avctx, AV_LOG_ERROR,
859 "Samples per pixel requires a single value, many provided\n");
860 return AVERROR_INVALIDDATA;
861 }
862 if (value > 4U) {
863 av_log(s->avctx, AV_LOG_ERROR,
864 "Samples per pixel %d is too large\n", value);
865 return AVERROR_INVALIDDATA;
866 }
867 if (s->bppcount == 1)
868 s->bpp *= value;
869 s->bppcount = value;
870 break;
871 case TIFF_COMPR:
872 s->compr = value;
873 av_log(s->avctx, AV_LOG_DEBUG, "compression: %d\n", s->compr);
874 s->predictor = 0;
875 switch (s->compr) {
876 case TIFF_RAW:
877 case TIFF_PACKBITS:
878 case TIFF_LZW:
879 case TIFF_CCITT_RLE:
880 break;
881 case TIFF_G3:
882 case TIFF_G4:
883 s->fax_opts = 0;
884 break;
885 case TIFF_DEFLATE:
886 case TIFF_ADOBE_DEFLATE:
887#if CONFIG_ZLIB
888 break;
889#else
890 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
891 return AVERROR(ENOSYS);
892#endif
893 case TIFF_JPEG:
894 case TIFF_NEWJPEG:
895 avpriv_report_missing_feature(s->avctx, "JPEG compression");
896 return AVERROR_PATCHWELCOME;
897 case TIFF_LZMA:
898#if CONFIG_LZMA
899 break;
900#else
901 av_log(s->avctx, AV_LOG_ERROR, "LZMA not compiled in\n");
902 return AVERROR(ENOSYS);
903#endif
904 default:
905 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
906 s->compr);
907 return AVERROR_INVALIDDATA;
908 }
909 break;
910 case TIFF_ROWSPERSTRIP:
911 if (!value || (type == TIFF_LONG && value == UINT_MAX))
912 value = s->height;
913 s->rps = FFMIN(value, s->height);
914 break;
915 case TIFF_STRIP_OFFS:
916 if (count == 1) {
917 if (value > INT_MAX) {
918 av_log(s->avctx, AV_LOG_ERROR,
919 "strippos %u too large\n", value);
920 return AVERROR_INVALIDDATA;
921 }
922 s->strippos = 0;
923 s->stripoff = value;
924 } else
925 s->strippos = off;
926 s->strips = count;
927 if (s->strips == 1)
928 s->rps = s->height;
929 s->sot = type;
930 break;
931 case TIFF_STRIP_SIZE:
932 if (count == 1) {
933 if (value > INT_MAX) {
934 av_log(s->avctx, AV_LOG_ERROR,
935 "stripsize %u too large\n", value);
936 return AVERROR_INVALIDDATA;
937 }
938 s->stripsizesoff = 0;
939 s->stripsize = value;
940 s->strips = 1;
941 } else {
942 s->stripsizesoff = off;
943 }
944 s->strips = count;
945 s->sstype = type;
946 break;
947 case TIFF_XRES:
948 case TIFF_YRES:
949 set_sar(s, tag, value, value2);
950 break;
951 case TIFF_TILE_BYTE_COUNTS:
952 case TIFF_TILE_LENGTH:
953 case TIFF_TILE_OFFSETS:
954 case TIFF_TILE_WIDTH:
955 av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");
956 return AVERROR_PATCHWELCOME;
957 break;
958 case TIFF_PREDICTOR:
959 s->predictor = value;
960 break;
961 case TIFF_PHOTOMETRIC:
962 switch (value) {
963 case TIFF_PHOTOMETRIC_WHITE_IS_ZERO:
964 case TIFF_PHOTOMETRIC_BLACK_IS_ZERO:
965 case TIFF_PHOTOMETRIC_RGB:
966 case TIFF_PHOTOMETRIC_PALETTE:
967 case TIFF_PHOTOMETRIC_YCBCR:
968 s->photometric = value;
969 break;
970 case TIFF_PHOTOMETRIC_ALPHA_MASK:
971 case TIFF_PHOTOMETRIC_SEPARATED:
972 case TIFF_PHOTOMETRIC_CIE_LAB:
973 case TIFF_PHOTOMETRIC_ICC_LAB:
974 case TIFF_PHOTOMETRIC_ITU_LAB:
975 case TIFF_PHOTOMETRIC_CFA:
976 case TIFF_PHOTOMETRIC_LOG_L:
977 case TIFF_PHOTOMETRIC_LOG_LUV:
978 case TIFF_PHOTOMETRIC_LINEAR_RAW:
979 avpriv_report_missing_feature(s->avctx,
980 "PhotometricInterpretation 0x%04X",
981 value);
982 return AVERROR_PATCHWELCOME;
983 default:
984 av_log(s->avctx, AV_LOG_ERROR, "PhotometricInterpretation %u is "
985 "unknown\n", value);
986 return AVERROR_INVALIDDATA;
987 }
988 break;
989 case TIFF_FILL_ORDER:
990 if (value < 1 || value > 2) {
991 av_log(s->avctx, AV_LOG_ERROR,
992 "Unknown FillOrder value %d, trying default one\n", value);
993 value = 1;
994 }
995 s->fill_order = value - 1;
996 break;
997 case TIFF_PAL: {
998 GetByteContext pal_gb[3];
999 off = type_sizes[type];
1000 if (count / 3 > 256 ||
1001 bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)
1002 return AVERROR_INVALIDDATA;
1003
1004 pal_gb[0] = pal_gb[1] = pal_gb[2] = s->gb;
1005 bytestream2_skip(&pal_gb[1], count / 3 * off);
1006 bytestream2_skip(&pal_gb[2], count / 3 * off * 2);
1007
1008 off = (type_sizes[type] - 1) << 3;
1009 if (off > 31U) {
1010 av_log(s->avctx, AV_LOG_ERROR, "palette shift %d is out of range\n", off);
1011 return AVERROR_INVALIDDATA;
1012 }
1013
1014 for (i = 0; i < count / 3; i++) {
1015 uint32_t p = 0xFF000000;
1016 p |= (ff_tget(&pal_gb[0], type, s->le) >> off) << 16;
1017 p |= (ff_tget(&pal_gb[1], type, s->le) >> off) << 8;
1018 p |= ff_tget(&pal_gb[2], type, s->le) >> off;
1019 s->palette[i] = p;
1020 }
1021 s->palette_is_set = 1;
1022 break;
1023 }
1024 case TIFF_PLANAR:
1025 s->planar = value == 2;
1026 break;
1027 case TIFF_YCBCR_SUBSAMPLING:
1028 if (count != 2) {
1029 av_log(s->avctx, AV_LOG_ERROR, "subsample count invalid\n");
1030 return AVERROR_INVALIDDATA;
1031 }
1032 for (i = 0; i < count; i++) {
1033 s->subsampling[i] = ff_tget(&s->gb, type, s->le);
1034 if (s->subsampling[i] <= 0) {
1035 av_log(s->avctx, AV_LOG_ERROR, "subsampling %d is invalid\n", s->subsampling[i]);
1036 return AVERROR_INVALIDDATA;
1037 }
1038 }
1039 break;
1040 case TIFF_T4OPTIONS:
1041 if (s->compr == TIFF_G3)
1042 s->fax_opts = value;
1043 break;
1044 case TIFF_T6OPTIONS:
1045 if (s->compr == TIFF_G4)
1046 s->fax_opts = value;
1047 break;
1048#define ADD_METADATA(count, name, sep)\
1049 if ((ret = add_metadata(count, type, name, sep, s, frame)) < 0) {\
1050 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\
1051 goto end;\
1052 }
1053 case TIFF_MODEL_PIXEL_SCALE:
1054 ADD_METADATA(count, "ModelPixelScaleTag", NULL);
1055 break;
1056 case TIFF_MODEL_TRANSFORMATION:
1057 ADD_METADATA(count, "ModelTransformationTag", NULL);
1058 break;
1059 case TIFF_MODEL_TIEPOINT:
1060 ADD_METADATA(count, "ModelTiepointTag", NULL);
1061 break;
1062 case TIFF_GEO_KEY_DIRECTORY:
1063 if (s->geotag_count) {
1064 avpriv_request_sample(s->avctx, "Multiple geo key directories\n");
1065 return AVERROR_INVALIDDATA;
1066 }
1067 ADD_METADATA(1, "GeoTIFF_Version", NULL);
1068 ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");
1069 s->geotag_count = ff_tget_short(&s->gb, s->le);
1070 if (s->geotag_count > count / 4 - 1) {
1071 s->geotag_count = count / 4 - 1;
1072 av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");
1073 }
1074 if ( bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4
1075 || s->geotag_count == 0) {
1076 s->geotag_count = 0;
1077 return -1;
1078 }
1079 s->geotags = av_mallocz_array(s->geotag_count, sizeof(TiffGeoTag));
1080 if (!s->geotags) {
1081 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
1082 s->geotag_count = 0;
1083 goto end;
1084 }
1085 for (i = 0; i < s->geotag_count; i++) {
1086 s->geotags[i].key = ff_tget_short(&s->gb, s->le);
1087 s->geotags[i].type = ff_tget_short(&s->gb, s->le);
1088 s->geotags[i].count = ff_tget_short(&s->gb, s->le);
1089
1090 if (!s->geotags[i].type)
1091 s->geotags[i].val = get_geokey_val(s->geotags[i].key, ff_tget_short(&s->gb, s->le));
1092 else
1093 s->geotags[i].offset = ff_tget_short(&s->gb, s->le);
1094 }
1095 break;
1096 case TIFF_GEO_DOUBLE_PARAMS:
1097 if (count >= INT_MAX / sizeof(int64_t))
1098 return AVERROR_INVALIDDATA;
1099 if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
1100 return AVERROR_INVALIDDATA;
1101 dp = av_malloc_array(count, sizeof(double));
1102 if (!dp) {
1103 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
1104 goto end;
1105 }
1106 for (i = 0; i < count; i++)
1107 dp[i] = ff_tget_double(&s->gb, s->le);
1108 for (i = 0; i < s->geotag_count; i++) {
1109 if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {
1110 if (s->geotags[i].count == 0
1111 || s->geotags[i].offset + s->geotags[i].count > count) {
1112 av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
1113 } else {
1114 char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");
1115 if (!ap) {
1116 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
1117 av_freep(&dp);
1118 return AVERROR(ENOMEM);
1119 }
1120 s->geotags[i].val = ap;
1121 }
1122 }
1123 }
1124 av_freep(&dp);
1125 break;
1126 case TIFF_GEO_ASCII_PARAMS:
1127 pos = bytestream2_tell(&s->gb);
1128 for (i = 0; i < s->geotag_count; i++) {
1129 if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {
1130 if (s->geotags[i].count == 0
1131 || s->geotags[i].offset + s->geotags[i].count > count) {
1132 av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
1133 } else {
1134 char *ap;
1135
1136 bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);
1137 if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)
1138 return AVERROR_INVALIDDATA;
1139 ap = av_malloc(s->geotags[i].count);
1140 if (!ap) {
1141 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
1142 return AVERROR(ENOMEM);
1143 }
1144 bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);
1145 ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte
1146 s->geotags[i].val = ap;
1147 }
1148 }
1149 }
1150 break;
1151 case TIFF_ARTIST:
1152 ADD_METADATA(count, "artist", NULL);
1153 break;
1154 case TIFF_COPYRIGHT:
1155 ADD_METADATA(count, "copyright", NULL);
1156 break;
1157 case TIFF_DATE:
1158 ADD_METADATA(count, "date", NULL);
1159 break;
1160 case TIFF_DOCUMENT_NAME:
1161 ADD_METADATA(count, "document_name", NULL);
1162 break;
1163 case TIFF_HOST_COMPUTER:
1164 ADD_METADATA(count, "computer", NULL);
1165 break;
1166 case TIFF_IMAGE_DESCRIPTION:
1167 ADD_METADATA(count, "description", NULL);
1168 break;
1169 case TIFF_MAKE:
1170 ADD_METADATA(count, "make", NULL);
1171 break;
1172 case TIFF_MODEL:
1173 ADD_METADATA(count, "model", NULL);
1174 break;
1175 case TIFF_PAGE_NAME:
1176 ADD_METADATA(count, "page_name", NULL);
1177 break;
1178 case TIFF_PAGE_NUMBER:
1179 ADD_METADATA(count, "page_number", " / ");
1180 break;
1181 case TIFF_SOFTWARE_NAME:
1182 ADD_METADATA(count, "software", NULL);
1183 break;
1184 default:
1185 if (s->avctx->err_recognition & AV_EF_EXPLODE) {
1186 av_log(s->avctx, AV_LOG_ERROR,
1187 "Unknown or unsupported tag %d/0X%0X\n",
1188 tag, tag);
1189 return AVERROR_INVALIDDATA;
1190 }
1191 }
1192end:
1193 if (s->bpp > 64U) {
1194 av_log(s->avctx, AV_LOG_ERROR,
1195 "This format is not supported (bpp=%d, %d components)\n",
1196 s->bpp, count);
1197 s->bpp = 0;
1198 return AVERROR_INVALIDDATA;
1199 }
1200 bytestream2_seek(&s->gb, start, SEEK_SET);
1201 return 0;
1202}
1203
1204static int decode_frame(AVCodecContext *avctx,
1205 void *data, int *got_frame, AVPacket *avpkt)
1206{
1207 TiffContext *const s = avctx->priv_data;
1208 AVFrame *const p = data;
1209 ThreadFrame frame = { .f = data };
1210 unsigned off;
1211 int le, ret, plane, planes;
1212 int i, j, entries, stride;
1213 unsigned soff, ssize;
1214 uint8_t *dst;
1215 GetByteContext stripsizes;
1216 GetByteContext stripdata;
1217
1218 bytestream2_init(&s->gb, avpkt->data, avpkt->size);
1219
1220 // parse image header
1221 if ((ret = ff_tdecode_header(&s->gb, &le, &off))) {
1222 av_log(avctx, AV_LOG_ERROR, "Invalid TIFF header\n");
1223 return ret;
1224 } else if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {
1225 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
1226 return AVERROR_INVALIDDATA;
1227 }
1228 s->le = le;
1229 // TIFF_BPP is not a required tag and defaults to 1
1230 s->bppcount = s->bpp = 1;
1231 s->photometric = TIFF_PHOTOMETRIC_NONE;
1232 s->compr = TIFF_RAW;
1233 s->fill_order = 0;
1234 free_geotags(s);
1235
1236 // Reset these offsets so we can tell if they were set this frame
1237 s->stripsizesoff = s->strippos = 0;
1238 /* parse image file directory */
1239 bytestream2_seek(&s->gb, off, SEEK_SET);
1240 entries = ff_tget_short(&s->gb, le);
1241 if (bytestream2_get_bytes_left(&s->gb) < entries * 12)
1242 return AVERROR_INVALIDDATA;
1243 for (i = 0; i < entries; i++) {
1244 if ((ret = tiff_decode_tag(s, p)) < 0)
1245 return ret;
1246 }
1247
1248 for (i = 0; i<s->geotag_count; i++) {
1249 const char *keyname = get_geokey_name(s->geotags[i].key);
1250 if (!keyname) {
1251 av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);
1252 continue;
1253 }
1254 if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {
1255 av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);
1256 continue;
1257 }
1258 ret = av_dict_set(avpriv_frame_get_metadatap(p), keyname, s->geotags[i].val, 0);
1259 if (ret<0) {
1260 av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);
1261 return ret;
1262 }
1263 }
1264
1265 if (!s->strippos && !s->stripoff) {
1266 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
1267 return AVERROR_INVALIDDATA;
1268 }
1269 /* now we have the data and may start decoding */
1270 if ((ret = init_image(s, &frame)) < 0)
1271 return ret;
1272
1273 if (s->strips == 1 && !s->stripsize) {
1274 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
1275 s->stripsize = avpkt->size - s->stripoff;
1276 }
1277
1278 if (s->stripsizesoff) {
1279 if (s->stripsizesoff >= (unsigned)avpkt->size)
1280 return AVERROR_INVALIDDATA;
1281 bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff,
1282 avpkt->size - s->stripsizesoff);
1283 }
1284 if (s->strippos) {
1285 if (s->strippos >= (unsigned)avpkt->size)
1286 return AVERROR_INVALIDDATA;
1287 bytestream2_init(&stripdata, avpkt->data + s->strippos,
1288 avpkt->size - s->strippos);
1289 }
1290
1291 if (s->rps <= 0 || s->rps % s->subsampling[1]) {
1292 av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);
1293 return AVERROR_INVALIDDATA;
1294 }
1295
1296 planes = s->planar ? s->bppcount : 1;
1297 for (plane = 0; plane < planes; plane++) {
1298 stride = p->linesize[plane];
1299 dst = p->data[plane];
1300 for (i = 0; i < s->height; i += s->rps) {
1301 if (s->stripsizesoff)
1302 ssize = ff_tget(&stripsizes, s->sstype, le);
1303 else
1304 ssize = s->stripsize;
1305
1306 if (s->strippos)
1307 soff = ff_tget(&stripdata, s->sot, le);
1308 else
1309 soff = s->stripoff;
1310
1311 if (soff > avpkt->size || ssize > avpkt->size - soff) {
1312 av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
1313 return AVERROR_INVALIDDATA;
1314 }
1315 if ((ret = tiff_unpack_strip(s, p, dst, stride, avpkt->data + soff, ssize, i,
1316 FFMIN(s->rps, s->height - i))) < 0) {
1317 if (avctx->err_recognition & AV_EF_EXPLODE)
1318 return ret;
1319 break;
1320 }
1321 dst += s->rps * stride;
1322 }
1323 if (s->predictor == 2) {
1324 if (s->photometric == TIFF_PHOTOMETRIC_YCBCR) {
1325 av_log(s->avctx, AV_LOG_ERROR, "predictor == 2 with YUV is unsupported");
1326 return AVERROR_PATCHWELCOME;
1327 }
1328 dst = p->data[plane];
1329 soff = s->bpp >> 3;
1330 if (s->planar)
1331 soff = FFMAX(soff / s->bppcount, 1);
1332 ssize = s->width * soff;
1333 if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
1334 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE ||
1335 s->avctx->pix_fmt == AV_PIX_FMT_GRAY16LE ||
1336 s->avctx->pix_fmt == AV_PIX_FMT_YA16LE ||
1337 s->avctx->pix_fmt == AV_PIX_FMT_GBRP16LE ||
1338 s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16LE) {
1339 for (i = 0; i < s->height; i++) {
1340 for (j = soff; j < ssize; j += 2)
1341 AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
1342 dst += stride;
1343 }
1344 } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
1345 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE ||
1346 s->avctx->pix_fmt == AV_PIX_FMT_GRAY16BE ||
1347 s->avctx->pix_fmt == AV_PIX_FMT_YA16BE ||
1348 s->avctx->pix_fmt == AV_PIX_FMT_GBRP16BE ||
1349 s->avctx->pix_fmt == AV_PIX_FMT_GBRAP16BE) {
1350 for (i = 0; i < s->height; i++) {
1351 for (j = soff; j < ssize; j += 2)
1352 AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
1353 dst += stride;
1354 }
1355 } else {
1356 for (i = 0; i < s->height; i++) {
1357 for (j = soff; j < ssize; j++)
1358 dst[j] += dst[j - soff];
1359 dst += stride;
1360 }
1361 }
1362 }
1363
1364 if (s->photometric == TIFF_PHOTOMETRIC_WHITE_IS_ZERO) {
1365 dst = p->data[plane];
1366 for (i = 0; i < s->height; i++) {
1367 for (j = 0; j < stride; j++)
1368 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
1369 dst += stride;
1370 }
1371 }
1372 }
1373
1374 if (s->planar && s->bppcount > 2) {
1375 FFSWAP(uint8_t*, p->data[0], p->data[2]);
1376 FFSWAP(int, p->linesize[0], p->linesize[2]);
1377 FFSWAP(uint8_t*, p->data[0], p->data[1]);
1378 FFSWAP(int, p->linesize[0], p->linesize[1]);
1379 }
1380
1381 *got_frame = 1;
1382
1383 return avpkt->size;
1384}
1385
1386static av_cold int tiff_init(AVCodecContext *avctx)
1387{
1388 TiffContext *s = avctx->priv_data;
1389
1390 s->width = 0;
1391 s->height = 0;
1392 s->subsampling[0] =
1393 s->subsampling[1] = 1;
1394 s->avctx = avctx;
1395 ff_lzw_decode_open(&s->lzw);
1396 ff_ccitt_unpack_init();
1397
1398 return 0;
1399}
1400
1401static av_cold int tiff_end(AVCodecContext *avctx)
1402{
1403 TiffContext *const s = avctx->priv_data;
1404
1405 free_geotags(s);
1406
1407 ff_lzw_decode_close(&s->lzw);
1408 av_freep(&s->deinvert_buf);
1409 return 0;
1410}
1411
1412AVCodec ff_tiff_decoder = {
1413 .name = "tiff",
1414 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),
1415 .type = AVMEDIA_TYPE_VIDEO,
1416 .id = AV_CODEC_ID_TIFF,
1417 .priv_data_size = sizeof(TiffContext),
1418 .init = tiff_init,
1419 .close = tiff_end,
1420 .decode = decode_frame,
1421 .init_thread_copy = ONLY_IF_THREADS_ENABLED(tiff_init),
1422 .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_FRAME_THREADS,
1423};
1424
generated by cgit at 2024-05-18 08:40:19 (GMT)