2 * Copyright (c) 2006 Konstantin Shishkov
4 * This file is part of FFmpeg.
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.
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.
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
24 * @author Konstantin Shishkov
28 #include "bytestream.h"
35 #include "tiff_data.h"
39 #include "libavutil/attributes.h"
40 #include "libavutil/intreadwrite.h"
41 #include "libavutil/imgutils.h"
42 #include "libavutil/avstring.h"
44 typedef struct TiffContext {
45 AVCodecContext *avctx;
50 unsigned int bpp, bppcount;
51 uint32_t palette[256];
60 int strips, rps, sstype;
62 int stripsizesoff, stripsize, stripoff, strippos;
69 static unsigned tget_short(GetByteContext *gb, int le)
71 unsigned v = le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);
75 static unsigned tget_long(GetByteContext *gb, int le)
77 unsigned v = le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);
81 static double tget_double(GetByteContext *gb, int le)
83 av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)};
87 static unsigned tget(GetByteContext *gb, int type, int le)
90 case TIFF_BYTE : return bytestream2_get_byte(gb);
91 case TIFF_SHORT: return tget_short(gb, le);
92 case TIFF_LONG : return tget_long(gb, le);
93 default : return UINT_MAX;
97 static void free_geotags(TiffContext *const s)
100 for (i = 0; i < s->geotag_count; i++) {
101 if (s->geotags[i].val)
102 av_freep(&s->geotags[i].val);
104 av_freep(&s->geotags);
107 #define RET_GEOKEY(TYPE, array, element)\
108 if (key >= TIFF_##TYPE##_KEY_ID_OFFSET &&\
109 key - TIFF_##TYPE##_KEY_ID_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_name_type_map))\
110 return ff_tiff_##array##_name_type_map[key - TIFF_##TYPE##_KEY_ID_OFFSET].element;
112 static const char *get_geokey_name(int key)
114 RET_GEOKEY(VERT, vert, name);
115 RET_GEOKEY(PROJ, proj, name);
116 RET_GEOKEY(GEOG, geog, name);
117 RET_GEOKEY(CONF, conf, name);
122 static int get_geokey_type(int key)
124 RET_GEOKEY(VERT, vert, type);
125 RET_GEOKEY(PROJ, proj, type);
126 RET_GEOKEY(GEOG, geog, type);
127 RET_GEOKEY(CONF, conf, type);
129 return AVERROR_INVALIDDATA;
132 static int cmp_id_key(const void *id, const void *k)
134 return *(const int*)id - ((const TiffGeoTagKeyName*)k)->key;
137 static const char *search_keyval(const TiffGeoTagKeyName *keys, int n, int id)
139 return ((TiffGeoTagKeyName*)bsearch(&id, keys, n, sizeof(keys[0]), cmp_id_key))->name;
142 static char *get_geokey_val(int key, int val)
146 if (val == TIFF_GEO_KEY_UNDEFINED)
147 return av_strdup("undefined");
148 if (val == TIFF_GEO_KEY_USER_DEFINED)
149 return av_strdup("User-Defined");
151 #define RET_GEOKEY_VAL(TYPE, array)\
152 if (val >= TIFF_##TYPE##_OFFSET &&\
153 val - TIFF_##TYPE##_OFFSET < FF_ARRAY_ELEMS(ff_tiff_##array##_codes))\
154 return av_strdup(ff_tiff_##array##_codes[val - TIFF_##TYPE##_OFFSET]);
157 case TIFF_GT_MODEL_TYPE_GEOKEY:
158 RET_GEOKEY_VAL(GT_MODEL_TYPE, gt_model_type);
160 case TIFF_GT_RASTER_TYPE_GEOKEY:
161 RET_GEOKEY_VAL(GT_RASTER_TYPE, gt_raster_type);
163 case TIFF_GEOG_LINEAR_UNITS_GEOKEY:
164 case TIFF_PROJ_LINEAR_UNITS_GEOKEY:
165 case TIFF_VERTICAL_UNITS_GEOKEY:
166 RET_GEOKEY_VAL(LINEAR_UNIT, linear_unit);
168 case TIFF_GEOG_ANGULAR_UNITS_GEOKEY:
169 case TIFF_GEOG_AZIMUTH_UNITS_GEOKEY:
170 RET_GEOKEY_VAL(ANGULAR_UNIT, angular_unit);
172 case TIFF_GEOGRAPHIC_TYPE_GEOKEY:
173 RET_GEOKEY_VAL(GCS_TYPE, gcs_type);
174 RET_GEOKEY_VAL(GCSE_TYPE, gcse_type);
176 case TIFF_GEOG_GEODETIC_DATUM_GEOKEY:
177 RET_GEOKEY_VAL(GEODETIC_DATUM, geodetic_datum);
178 RET_GEOKEY_VAL(GEODETIC_DATUM_E, geodetic_datum_e);
180 case TIFF_GEOG_ELLIPSOID_GEOKEY:
181 RET_GEOKEY_VAL(ELLIPSOID, ellipsoid);
183 case TIFF_GEOG_PRIME_MERIDIAN_GEOKEY:
184 RET_GEOKEY_VAL(PRIME_MERIDIAN, prime_meridian);
186 case TIFF_PROJECTED_CS_TYPE_GEOKEY:
187 return av_strdup(search_keyval(ff_tiff_proj_cs_type_codes, FF_ARRAY_ELEMS(ff_tiff_proj_cs_type_codes), val));
189 case TIFF_PROJECTION_GEOKEY:
190 return av_strdup(search_keyval(ff_tiff_projection_codes, FF_ARRAY_ELEMS(ff_tiff_projection_codes), val));
192 case TIFF_PROJ_COORD_TRANS_GEOKEY:
193 RET_GEOKEY_VAL(COORD_TRANS, coord_trans);
195 case TIFF_VERTICAL_CS_TYPE_GEOKEY:
196 RET_GEOKEY_VAL(VERT_CS, vert_cs);
197 RET_GEOKEY_VAL(ORTHO_VERT_CS, ortho_vert_cs);
204 snprintf(ap, 14, "Unknown-%d", val);
208 static char *doubles2str(double *dp, int count, const char *sep)
213 if (!sep) sep = ", ";
214 component_len = 15 + strlen(sep);
215 ap = av_malloc(component_len * count);
220 for (i = 0; i < count; i++) {
221 unsigned l = snprintf(ap, component_len, "%f%s", dp[i], sep);
222 if(l >= component_len) {
228 ap0[strlen(ap0) - strlen(sep)] = '\0';
232 static char *shorts2str(int16_t *sp, int count, const char *sep)
236 if (!sep) sep = ", ";
237 ap = av_malloc((5 + strlen(sep)) * count);
242 for (i = 0; i < count; i++) {
243 int l = snprintf(ap, 5 + strlen(sep), "%d%s", sp[i], sep);
246 ap0[strlen(ap0) - strlen(sep)] = '\0';
250 static int add_doubles_metadata(int count,
251 const char *name, const char *sep,
258 if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
259 return AVERROR_INVALIDDATA;
260 if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
261 return AVERROR_INVALIDDATA;
263 dp = av_malloc(count * sizeof(double));
265 return AVERROR(ENOMEM);
267 for (i = 0; i < count; i++)
268 dp[i] = tget_double(&s->gb, s->le);
269 ap = doubles2str(dp, count, sep);
272 return AVERROR(ENOMEM);
273 av_dict_set(&s->picture.metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
277 static int add_shorts_metadata(int count, const char *name,
278 const char *sep, TiffContext *s)
284 if (count >= INT_MAX / sizeof(int16_t) || count <= 0)
285 return AVERROR_INVALIDDATA;
286 if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int16_t))
287 return AVERROR_INVALIDDATA;
289 sp = av_malloc(count * sizeof(int16_t));
291 return AVERROR(ENOMEM);
293 for (i = 0; i < count; i++)
294 sp[i] = tget_short(&s->gb, s->le);
295 ap = shorts2str(sp, count, sep);
298 return AVERROR(ENOMEM);
299 av_dict_set(&s->picture.metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
303 static int add_string_metadata(int count, const char *name,
308 if (bytestream2_get_bytes_left(&s->gb) < count)
309 return AVERROR_INVALIDDATA;
311 value = av_malloc(count + 1);
313 return AVERROR(ENOMEM);
315 bytestream2_get_bufferu(&s->gb, value, count);
318 av_dict_set(&s->picture.metadata, name, value, AV_DICT_DONT_STRDUP_VAL);
322 static int add_metadata(int count, int type,
323 const char *name, const char *sep, TiffContext *s)
326 case TIFF_DOUBLE: return add_doubles_metadata(count, name, sep, s);
327 case TIFF_SHORT : return add_shorts_metadata(count, name, sep, s);
328 case TIFF_STRING: return add_string_metadata(count, name, s);
329 default : return AVERROR_INVALIDDATA;
334 static int tiff_uncompress(uint8_t *dst, unsigned long *len, const uint8_t *src,
337 z_stream zstream = { 0 };
340 zstream.next_in = (uint8_t *)src;
341 zstream.avail_in = size;
342 zstream.next_out = dst;
343 zstream.avail_out = *len;
344 zret = inflateInit(&zstream);
346 av_log(NULL, AV_LOG_ERROR, "Inflate init error: %d\n", zret);
349 zret = inflate(&zstream, Z_SYNC_FLUSH);
350 inflateEnd(&zstream);
351 *len = zstream.total_out;
352 return zret == Z_STREAM_END ? Z_OK : zret;
356 static void av_always_inline horizontal_fill(unsigned int bpp, uint8_t* dst,
357 int usePtr, const uint8_t *src,
358 uint8_t c, int width, int offset)
362 while (--width >= 0) {
363 dst[(width+offset)*8+7] = (usePtr ? src[width] : c) & 0x1;
364 dst[(width+offset)*8+6] = (usePtr ? src[width] : c) >> 1 & 0x1;
365 dst[(width+offset)*8+5] = (usePtr ? src[width] : c) >> 2 & 0x1;
366 dst[(width+offset)*8+4] = (usePtr ? src[width] : c) >> 3 & 0x1;
367 dst[(width+offset)*8+3] = (usePtr ? src[width] : c) >> 4 & 0x1;
368 dst[(width+offset)*8+2] = (usePtr ? src[width] : c) >> 5 & 0x1;
369 dst[(width+offset)*8+1] = (usePtr ? src[width] : c) >> 6 & 0x1;
370 dst[(width+offset)*8+0] = (usePtr ? src[width] : c) >> 7;
374 while (--width >= 0) {
375 dst[(width+offset)*4+3] = (usePtr ? src[width] : c) & 0x3;
376 dst[(width+offset)*4+2] = (usePtr ? src[width] : c) >> 2 & 0x3;
377 dst[(width+offset)*4+1] = (usePtr ? src[width] : c) >> 4 & 0x3;
378 dst[(width+offset)*4+0] = (usePtr ? src[width] : c) >> 6;
382 while (--width >= 0) {
383 dst[(width+offset)*2+1] = (usePtr ? src[width] : c) & 0xF;
384 dst[(width+offset)*2+0] = (usePtr ? src[width] : c) >> 4;
389 memcpy(dst + offset, src, width);
391 memset(dst + offset, c, width);
396 static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride,
397 const uint8_t *src, int size, int lines)
399 int c, line, pixels, code;
400 const uint8_t *ssrc = src;
401 int width = ((s->width * s->bpp) + 7) >> 3;
404 return AVERROR_INVALIDDATA;
407 if (s->compr == TIFF_DEFLATE || s->compr == TIFF_ADOBE_DEFLATE) {
408 uint8_t *src2 = NULL, *zbuf;
409 unsigned long outlen;
411 outlen = width * lines;
412 zbuf = av_malloc(outlen);
414 return AVERROR(ENOMEM);
416 src2 = av_malloc((unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE);
418 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
420 return AVERROR(ENOMEM);
422 for (i = 0; i < size; i++)
423 src2[i] = ff_reverse[src[i]];
424 memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
427 ret = tiff_uncompress(zbuf, &outlen, src, size);
429 av_log(s->avctx, AV_LOG_ERROR,
430 "Uncompressing failed (%lu of %lu) with error %d\n", outlen,
431 (unsigned long)width * lines, ret);
437 for (line = 0; line < lines; line++) {
438 if(s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8){
439 horizontal_fill(s->bpp, dst, 1, src, 0, width, 0);
441 memcpy(dst, src, width);
451 if (s->compr == TIFF_LZW) {
452 if (ff_lzw_decode_init(s->lzw, 8, src, size, FF_LZW_TIFF) < 0) {
453 av_log(s->avctx, AV_LOG_ERROR, "Error initializing LZW decoder\n");
457 if (s->compr == TIFF_CCITT_RLE || s->compr == TIFF_G3
458 || s->compr == TIFF_G4) {
460 uint8_t *src2 = av_malloc((unsigned)size +
461 FF_INPUT_BUFFER_PADDING_SIZE);
464 av_log(s->avctx, AV_LOG_ERROR,
465 "Error allocating temporary buffer\n");
466 return AVERROR(ENOMEM);
468 if (s->fax_opts & 2) {
469 av_log(s->avctx, AV_LOG_ERROR,
470 "Uncompressed fax mode is not supported (yet)\n");
474 if (!s->fill_order) {
475 memcpy(src2, src, size);
477 for (i = 0; i < size; i++)
478 src2[i] = ff_reverse[src[i]];
480 memset(src2 + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
485 ret = ff_ccitt_unpack(s->avctx, src2, size, dst, lines, stride,
486 s->compr, s->fax_opts);
489 if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
490 for (line = 0; line < lines; line++) {
491 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
497 for (line = 0; line < lines; line++) {
498 if (src - ssrc > size) {
499 av_log(s->avctx, AV_LOG_ERROR, "Source data overread\n");
504 if (ssrc + size - src < width)
505 return AVERROR_INVALIDDATA;
506 if (!s->fill_order) {
507 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
508 dst, 1, src, 0, width, 0);
511 for (i = 0; i < width; i++)
512 dst[i] = ff_reverse[src[i]];
517 for (pixels = 0; pixels < width;) {
518 if (ssrc + size - src < 2) {
519 av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
520 return AVERROR_INVALIDDATA;
522 code = (int8_t) * src++;
525 if (pixels + code > width) {
526 av_log(s->avctx, AV_LOG_ERROR,
527 "Copy went out of bounds\n");
530 if (ssrc + size - src < code) {
531 av_log(s->avctx, AV_LOG_ERROR, "Read went out of bounds\n");
532 return AVERROR_INVALIDDATA;
534 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
535 dst, 1, src, 0, code, pixels);
538 } else if (code != -128) { // -127..-1
540 if (pixels + code > width) {
541 av_log(s->avctx, AV_LOG_ERROR,
542 "Run went out of bounds\n");
546 horizontal_fill(s->bpp * (s->avctx->pix_fmt == AV_PIX_FMT_PAL8),
547 dst, 0, NULL, c, code, pixels);
553 pixels = ff_lzw_decode(s->lzw, dst, width);
554 if (pixels < width) {
555 av_log(s->avctx, AV_LOG_ERROR, "Decoded only %i bytes of %i\n",
559 if (s->bpp < 8 && s->avctx->pix_fmt == AV_PIX_FMT_PAL8)
560 horizontal_fill(s->bpp, dst, 1, dst, 0, width, 0);
568 static int init_image(TiffContext *s)
573 switch (s->bpp * 10 + s->bppcount) {
575 if (!s->palette_is_set) {
576 s->avctx->pix_fmt = AV_PIX_FMT_MONOBLACK;
582 s->avctx->pix_fmt = AV_PIX_FMT_PAL8;
585 s->avctx->pix_fmt = AV_PIX_FMT_RGB24;
588 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_GRAY16LE : AV_PIX_FMT_GRAY16BE;
591 s->avctx->pix_fmt = AV_PIX_FMT_GRAY8A;
594 s->avctx->pix_fmt = AV_PIX_FMT_RGBA;
597 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGB48LE : AV_PIX_FMT_RGB48BE;
600 s->avctx->pix_fmt = s->le ? AV_PIX_FMT_RGBA64LE : AV_PIX_FMT_RGBA64BE;
603 av_log(s->avctx, AV_LOG_ERROR,
604 "This format is not supported (bpp=%d, bppcount=%d)\n",
605 s->bpp, s->bppcount);
606 return AVERROR_INVALIDDATA;
608 if (s->width != s->avctx->width || s->height != s->avctx->height) {
609 if ((ret = av_image_check_size(s->width, s->height, 0, s->avctx)) < 0)
611 avcodec_set_dimensions(s->avctx, s->width, s->height);
613 if (s->picture.data[0])
614 s->avctx->release_buffer(s->avctx, &s->picture);
615 if ((ret = ff_get_buffer(s->avctx, &s->picture)) < 0) {
616 av_log(s->avctx, AV_LOG_ERROR, "get_buffer() failed\n");
619 if (s->avctx->pix_fmt == AV_PIX_FMT_PAL8) {
620 if (s->palette_is_set) {
621 memcpy(s->picture.data[1], s->palette, sizeof(s->palette));
623 /* make default grayscale pal */
624 pal = (uint32_t *) s->picture.data[1];
625 for (i = 0; i < 1<<s->bpp; i++)
626 pal[i] = 0xFFU << 24 | i * 255 / ((1<<s->bpp) - 1) * 0x010101;
632 static int tiff_decode_tag(TiffContext *s)
634 unsigned tag, type, count, off, value = 0;
635 int i, j, k, pos, start;
640 tag = tget_short(&s->gb, s->le);
641 type = tget_short(&s->gb, s->le);
642 count = tget_long(&s->gb, s->le);
643 off = tget_long(&s->gb, s->le);
644 start = bytestream2_tell(&s->gb);
646 if (type == 0 || type >= FF_ARRAY_ELEMS(type_sizes)) {
647 av_log(s->avctx, AV_LOG_DEBUG, "Unknown tiff type (%u) encountered\n",
656 bytestream2_seek(&s->gb, -4, SEEK_CUR);
657 value = tget(&s->gb, type, s->le);
664 bytestream2_seek(&s->gb, -4, SEEK_CUR);
669 bytestream2_seek(&s->gb, off, SEEK_SET);
672 if (count <= 4 && type_sizes[type] * count <= 4) {
673 bytestream2_seek(&s->gb, -4, SEEK_CUR);
675 bytestream2_seek(&s->gb, off, SEEK_SET);
689 av_log(s->avctx, AV_LOG_ERROR,
690 "This format is not supported (bpp=%d, %d components)\n",
699 s->bpp = (off & 0xFF) + ((off >> 8) & 0xFF) +
700 ((off >> 16) & 0xFF) + ((off >> 24) & 0xFF);
705 if (bytestream2_get_bytes_left(&s->gb) < type_sizes[type] * count)
707 for (i = 0; i < count; i++)
708 s->bpp += tget(&s->gb, type, s->le);
715 case TIFF_SAMPLES_PER_PIXEL:
717 av_log(s->avctx, AV_LOG_ERROR,
718 "Samples per pixel requires a single value, many provided\n");
719 return AVERROR_INVALIDDATA;
721 if (s->bppcount == 1)
739 case TIFF_ADOBE_DEFLATE:
743 av_log(s->avctx, AV_LOG_ERROR, "Deflate: ZLib not compiled in\n");
748 av_log(s->avctx, AV_LOG_ERROR,
749 "JPEG compression is not supported\n");
752 av_log(s->avctx, AV_LOG_ERROR, "Unknown compression method %i\n",
757 case TIFF_ROWSPERSTRIP:
758 if (type == TIFF_LONG && value == UINT_MAX)
759 value = s->avctx->height;
761 av_log(s->avctx, AV_LOG_ERROR,
762 "Incorrect value of rows per strip\n");
767 case TIFF_STRIP_OFFS:
777 if (s->strippos > bytestream2_size(&s->gb)) {
778 av_log(s->avctx, AV_LOG_ERROR,
779 "Tag referencing position outside the image\n");
783 case TIFF_STRIP_SIZE:
785 s->stripsizesoff = 0;
786 s->stripsize = value;
789 s->stripsizesoff = off;
793 if (s->stripsizesoff > bytestream2_size(&s->gb)) {
794 av_log(s->avctx, AV_LOG_ERROR,
795 "Tag referencing position outside the image\n");
799 case TIFF_TILE_BYTE_COUNTS:
800 case TIFF_TILE_LENGTH:
801 case TIFF_TILE_OFFSETS:
802 case TIFF_TILE_WIDTH:
803 av_log(s->avctx, AV_LOG_ERROR, "Tiled images are not supported\n");
804 return AVERROR_PATCHWELCOME;
807 s->predictor = value;
821 av_log(s->avctx, AV_LOG_ERROR, "Color mode %d is not supported\n",
826 case TIFF_FILL_ORDER:
827 if (value < 1 || value > 2) {
828 av_log(s->avctx, AV_LOG_ERROR,
829 "Unknown FillOrder value %d, trying default one\n", value);
832 s->fill_order = value - 1;
835 pal = (uint32_t *) s->palette;
836 off = type_sizes[type];
837 if (count / 3 > 256 || bytestream2_get_bytes_left(&s->gb) < count / 3 * off * 3)
839 off = (type_sizes[type] - 1) << 3;
840 for (k = 2; k >= 0; k--) {
841 for (i = 0; i < count / 3; i++) {
843 pal[i] = 0xFFU << 24;
844 j = (tget(&s->gb, type, s->le) >> off) << (k * 8);
848 s->palette_is_set = 1;
852 av_log(s->avctx, AV_LOG_ERROR, "Planar format is not supported\n");
857 if (s->compr == TIFF_G3)
861 if (s->compr == TIFF_G4)
864 #define ADD_METADATA(count, name, sep)\
865 if (ret = add_metadata(count, type, name, sep, s) < 0) {\
866 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");\
869 case TIFF_MODEL_PIXEL_SCALE:
870 ADD_METADATA(count, "ModelPixelScaleTag", NULL);
872 case TIFF_MODEL_TRANSFORMATION:
873 ADD_METADATA(count, "ModelTransformationTag", NULL);
875 case TIFF_MODEL_TIEPOINT:
876 ADD_METADATA(count, "ModelTiepointTag", NULL);
878 case TIFF_GEO_KEY_DIRECTORY:
879 ADD_METADATA(1, "GeoTIFF_Version", NULL);
880 ADD_METADATA(2, "GeoTIFF_Key_Revision", ".");
881 s->geotag_count = tget_short(&s->gb, s->le);
882 if (s->geotag_count > count / 4 - 1) {
883 s->geotag_count = count / 4 - 1;
884 av_log(s->avctx, AV_LOG_WARNING, "GeoTIFF key directory buffer shorter than specified\n");
886 if (bytestream2_get_bytes_left(&s->gb) < s->geotag_count * sizeof(int16_t) * 4)
888 s->geotags = av_mallocz(sizeof(TiffGeoTag) * s->geotag_count);
890 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
891 return AVERROR(ENOMEM);
893 for (i = 0; i < s->geotag_count; i++) {
894 s->geotags[i].key = tget_short(&s->gb, s->le);
895 s->geotags[i].type = tget_short(&s->gb, s->le);
896 s->geotags[i].count = tget_short(&s->gb, s->le);
898 if (!s->geotags[i].type)
899 s->geotags[i].val = get_geokey_val(s->geotags[i].key, tget_short(&s->gb, s->le));
901 s->geotags[i].offset = tget_short(&s->gb, s->le);
904 case TIFF_GEO_DOUBLE_PARAMS:
905 if (count >= INT_MAX / sizeof(int64_t))
906 return AVERROR_INVALIDDATA;
907 if (bytestream2_get_bytes_left(&s->gb) < count * sizeof(int64_t))
908 return AVERROR_INVALIDDATA;
909 dp = av_malloc(count * sizeof(double));
911 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
912 return AVERROR(ENOMEM);
914 for (i = 0; i < count; i++)
915 dp[i] = tget_double(&s->gb, s->le);
916 for (i = 0; i < s->geotag_count; i++) {
917 if (s->geotags[i].type == TIFF_GEO_DOUBLE_PARAMS) {
918 if (s->geotags[i].count == 0
919 || s->geotags[i].offset + s->geotags[i].count > count) {
920 av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
922 char *ap = doubles2str(&dp[s->geotags[i].offset], s->geotags[i].count, ", ");
924 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
926 return AVERROR(ENOMEM);
928 s->geotags[i].val = ap;
934 case TIFF_GEO_ASCII_PARAMS:
935 pos = bytestream2_tell(&s->gb);
936 for (i = 0; i < s->geotag_count; i++) {
937 if (s->geotags[i].type == TIFF_GEO_ASCII_PARAMS) {
938 if (s->geotags[i].count == 0
939 || s->geotags[i].offset + s->geotags[i].count > count) {
940 av_log(s->avctx, AV_LOG_WARNING, "Invalid GeoTIFF key %d\n", s->geotags[i].key);
944 bytestream2_seek(&s->gb, pos + s->geotags[i].offset, SEEK_SET);
945 if (bytestream2_get_bytes_left(&s->gb) < s->geotags[i].count)
947 ap = av_malloc(s->geotags[i].count);
949 av_log(s->avctx, AV_LOG_ERROR, "Error allocating temporary buffer\n");
950 return AVERROR(ENOMEM);
952 bytestream2_get_bufferu(&s->gb, ap, s->geotags[i].count);
953 ap[s->geotags[i].count - 1] = '\0'; //replace the "|" delimiter with a 0 byte
954 s->geotags[i].val = ap;
960 ADD_METADATA(count, "artist", NULL);
963 ADD_METADATA(count, "copyright", NULL);
966 ADD_METADATA(count, "date", NULL);
968 case TIFF_DOCUMENT_NAME:
969 ADD_METADATA(count, "document_name", NULL);
971 case TIFF_HOST_COMPUTER:
972 ADD_METADATA(count, "computer", NULL);
974 case TIFF_IMAGE_DESCRIPTION:
975 ADD_METADATA(count, "description", NULL);
978 ADD_METADATA(count, "make", NULL);
981 ADD_METADATA(count, "model", NULL);
984 ADD_METADATA(count, "page_name", NULL);
986 case TIFF_PAGE_NUMBER:
987 ADD_METADATA(count, "page_number", " / ");
989 case TIFF_SOFTWARE_NAME:
990 ADD_METADATA(count, "software", NULL);
993 av_log(s->avctx, AV_LOG_DEBUG, "Unknown or unsupported tag %d/0X%0X\n",
996 bytestream2_seek(&s->gb, start, SEEK_SET);
1000 static int decode_frame(AVCodecContext *avctx,
1001 void *data, int *got_frame, AVPacket *avpkt)
1003 TiffContext *const s = avctx->priv_data;
1004 AVFrame *picture = data;
1005 AVFrame *const p = &s->picture;
1010 unsigned soff, ssize;
1012 GetByteContext stripsizes;
1013 GetByteContext stripdata;
1015 bytestream2_init(&s->gb, avpkt->data, avpkt->size);
1017 //parse image header
1018 if (avpkt->size < 8)
1019 return AVERROR_INVALIDDATA;
1020 id = bytestream2_get_le16u(&s->gb);
1023 else if (id == 0x4D4D)
1026 av_log(avctx, AV_LOG_ERROR, "TIFF header not found\n");
1030 // TIFF_BPP is not a required tag and defaults to 1
1031 s->bppcount = s->bpp = 1;
1033 s->compr = TIFF_RAW;
1036 /* metadata has been destroyed from lavc internals, that pointer is not
1038 s->picture.metadata = NULL;
1040 // As TIFF 6.0 specification puts it "An arbitrary but carefully chosen number
1041 // that further identifies the file as a TIFF file"
1042 if (tget_short(&s->gb, le) != 42) {
1043 av_log(avctx, AV_LOG_ERROR,
1044 "The answer to life, universe and everything is not correct!\n");
1047 // Reset these offsets so we can tell if they were set this frame
1048 s->stripsizesoff = s->strippos = 0;
1049 /* parse image file directory */
1050 off = tget_long(&s->gb, le);
1051 if (off >= UINT_MAX - 14 || avpkt->size < off + 14) {
1052 av_log(avctx, AV_LOG_ERROR, "IFD offset is greater than image size\n");
1053 return AVERROR_INVALIDDATA;
1055 bytestream2_seek(&s->gb, off, SEEK_SET);
1056 entries = tget_short(&s->gb, le);
1057 if (bytestream2_get_bytes_left(&s->gb) < entries * 12)
1058 return AVERROR_INVALIDDATA;
1059 for (i = 0; i < entries; i++) {
1060 if (tiff_decode_tag(s) < 0)
1064 for (i = 0; i<s->geotag_count; i++) {
1065 const char *keyname = get_geokey_name(s->geotags[i].key);
1067 av_log(avctx, AV_LOG_WARNING, "Unknown or unsupported GeoTIFF key %d\n", s->geotags[i].key);
1070 if (get_geokey_type(s->geotags[i].key) != s->geotags[i].type) {
1071 av_log(avctx, AV_LOG_WARNING, "Type of GeoTIFF key %d is wrong\n", s->geotags[i].key);
1074 ret = av_dict_set(&s->picture.metadata, keyname, s->geotags[i].val, 0);
1076 av_log(avctx, AV_LOG_ERROR, "Writing metadata with key '%s' failed\n", keyname);
1081 if (!s->strippos && !s->stripoff) {
1082 av_log(avctx, AV_LOG_ERROR, "Image data is missing\n");
1085 /* now we have the data and may start decoding */
1086 if ((ret = init_image(s)) < 0)
1089 if (s->strips == 1 && !s->stripsize) {
1090 av_log(avctx, AV_LOG_WARNING, "Image data size missing\n");
1091 s->stripsize = avpkt->size - s->stripoff;
1093 stride = p->linesize[0];
1096 if (s->stripsizesoff) {
1097 if (s->stripsizesoff >= (unsigned)avpkt->size)
1098 return AVERROR_INVALIDDATA;
1099 bytestream2_init(&stripsizes, avpkt->data + s->stripsizesoff, avpkt->size - s->stripsizesoff);
1102 if (s->strippos >= (unsigned)avpkt->size)
1103 return AVERROR_INVALIDDATA;
1104 bytestream2_init(&stripdata, avpkt->data + s->strippos, avpkt->size - s->strippos);
1108 av_log(avctx, AV_LOG_ERROR, "rps %d invalid\n", s->rps);
1109 return AVERROR_INVALIDDATA;
1112 for (i = 0; i < s->height; i += s->rps) {
1113 if (s->stripsizesoff)
1114 ssize = tget(&stripsizes, s->sstype, s->le);
1116 ssize = s->stripsize;
1119 soff = tget(&stripdata, s->sot, s->le);
1123 if (soff > avpkt->size || ssize > avpkt->size - soff) {
1124 av_log(avctx, AV_LOG_ERROR, "Invalid strip size/offset\n");
1127 if (tiff_unpack_strip(s, dst, stride, avpkt->data + soff, ssize,
1128 FFMIN(s->rps, s->height - i)) < 0)
1130 dst += s->rps * stride;
1132 if (s->predictor == 2) {
1135 ssize = s->width * soff;
1136 if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48LE ||
1137 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64LE) {
1138 for (i = 0; i < s->height; i++) {
1139 for (j = soff; j < ssize; j += 2)
1140 AV_WL16(dst + j, AV_RL16(dst + j) + AV_RL16(dst + j - soff));
1143 } else if (s->avctx->pix_fmt == AV_PIX_FMT_RGB48BE ||
1144 s->avctx->pix_fmt == AV_PIX_FMT_RGBA64BE) {
1145 for (i = 0; i < s->height; i++) {
1146 for (j = soff; j < ssize; j += 2)
1147 AV_WB16(dst + j, AV_RB16(dst + j) + AV_RB16(dst + j - soff));
1151 for (i = 0; i < s->height; i++) {
1152 for (j = soff; j < ssize; j++)
1153 dst[j] += dst[j - soff];
1160 dst = s->picture.data[0];
1161 for (i = 0; i < s->height; i++) {
1162 for (j = 0; j < s->picture.linesize[0]; j++)
1163 dst[j] = (s->avctx->pix_fmt == AV_PIX_FMT_PAL8 ? (1<<s->bpp) - 1 : 255) - dst[j];
1164 dst += s->picture.linesize[0];
1167 *picture = s->picture;
1173 static av_cold int tiff_init(AVCodecContext *avctx)
1175 TiffContext *s = avctx->priv_data;
1180 avcodec_get_frame_defaults(&s->picture);
1181 avctx->coded_frame = &s->picture;
1182 ff_lzw_decode_open(&s->lzw);
1183 ff_ccitt_unpack_init();
1188 static av_cold int tiff_end(AVCodecContext *avctx)
1190 TiffContext *const s = avctx->priv_data;
1194 ff_lzw_decode_close(&s->lzw);
1195 if (s->picture.data[0])
1196 avctx->release_buffer(avctx, &s->picture);
1200 AVCodec ff_tiff_decoder = {
1202 .type = AVMEDIA_TYPE_VIDEO,
1203 .id = AV_CODEC_ID_TIFF,
1204 .priv_data_size = sizeof(TiffContext),
1207 .decode = decode_frame,
1208 .capabilities = CODEC_CAP_DR1,
1209 .long_name = NULL_IF_CONFIG_SMALL("TIFF image"),