3 * Copyright (c) 2013 Thilo Borgmann <thilo.borgmann _at_ mail.de>
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 * TIFF Common Routines
25 * @author Thilo Borgmann <thilo.borgmann _at_ mail.de>
28 #include "tiff_common.h"
31 int ff_tis_ifd(unsigned tag)
34 for (i = 0; i < FF_ARRAY_ELEMS(ifd_tags); i++) {
35 if (ifd_tags[i] == tag) {
43 unsigned ff_tget_short(GetByteContext *gb, int le)
45 return le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);
49 unsigned ff_tget_long(GetByteContext *gb, int le)
51 return le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);
55 double ff_tget_double(GetByteContext *gb, int le)
57 av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)};
62 unsigned ff_tget(GetByteContext *gb, int type, int le)
65 case TIFF_BYTE: return bytestream2_get_byte(gb);
66 case TIFF_SHORT: return ff_tget_short(gb, le);
67 case TIFF_LONG: return ff_tget_long(gb, le);
68 default: return UINT_MAX;
72 static const char *auto_sep(int count, const char *sep, int i, int columns)
79 return columns < count ? "\n" : "";
82 int ff_tadd_rational_metadata(int count, const char *name, const char *sep,
83 GetByteContext *gb, int le, AVDictionary **metadata)
90 if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
91 return AVERROR_INVALIDDATA;
92 if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t))
93 return AVERROR_INVALIDDATA;
95 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
97 for (i = 0; i < count; i++) {
98 nom = ff_tget_long(gb, le);
99 denom = ff_tget_long(gb, le);
100 av_bprintf(&bp, "%s%7i:%-7i", auto_sep(count, sep, i, 4), nom, denom);
103 if ((i = av_bprint_finalize(&bp, &ap))) {
107 return AVERROR(ENOMEM);
110 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
116 int ff_tadd_long_metadata(int count, const char *name, const char *sep,
117 GetByteContext *gb, int le, AVDictionary **metadata)
123 if (count >= INT_MAX / sizeof(int32_t) || count <= 0)
124 return AVERROR_INVALIDDATA;
125 if (bytestream2_get_bytes_left(gb) < count * sizeof(int32_t))
126 return AVERROR_INVALIDDATA;
128 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
130 for (i = 0; i < count; i++) {
131 av_bprintf(&bp, "%s%7i", auto_sep(count, sep, i, 8), ff_tget_long(gb, le));
134 if ((i = av_bprint_finalize(&bp, &ap))) {
138 return AVERROR(ENOMEM);
141 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
147 int ff_tadd_doubles_metadata(int count, const char *name, const char *sep,
148 GetByteContext *gb, int le, AVDictionary **metadata)
154 if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
155 return AVERROR_INVALIDDATA;
156 if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t))
157 return AVERROR_INVALIDDATA;
159 av_bprint_init(&bp, 10 * count, 100 * count);
161 for (i = 0; i < count; i++) {
162 av_bprintf(&bp, "%s%.15g", auto_sep(count, sep, i, 4), ff_tget_double(gb, le));
165 if ((i = av_bprint_finalize(&bp, &ap))) {
169 return AVERROR(ENOMEM);
172 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
178 int ff_tadd_shorts_metadata(int count, const char *name, const char *sep,
179 GetByteContext *gb, int le, AVDictionary **metadata)
185 if (count >= INT_MAX / sizeof(int16_t) || count <= 0)
186 return AVERROR_INVALIDDATA;
187 if (bytestream2_get_bytes_left(gb) < count * sizeof(int16_t))
188 return AVERROR_INVALIDDATA;
190 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
192 for (i = 0; i < count; i++) {
193 av_bprintf(&bp, "%s%5i", auto_sep(count, sep, i, 8), ff_tget_short(gb, le));
196 if ((i = av_bprint_finalize(&bp, &ap))) {
200 return AVERROR(ENOMEM);
203 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
209 int ff_tadd_bytes_metadata(int count, const char *name, const char *sep,
210 GetByteContext *gb, int le, AVDictionary **metadata)
216 if (count >= INT_MAX / sizeof(int8_t) || count < 0)
217 return AVERROR_INVALIDDATA;
218 if (bytestream2_get_bytes_left(gb) < count * sizeof(int8_t))
219 return AVERROR_INVALIDDATA;
221 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
223 for (i = 0; i < count; i++) {
224 av_bprintf(&bp, "%s%3i", auto_sep(count, sep, i, 16), bytestream2_get_byte(gb));
227 if ((i = av_bprint_finalize(&bp, &ap))) {
231 return AVERROR(ENOMEM);
234 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
239 int ff_tadd_string_metadata(int count, const char *name,
240 GetByteContext *gb, int le, AVDictionary **metadata)
244 if (bytestream2_get_bytes_left(gb) < count || count < 0)
245 return AVERROR_INVALIDDATA;
247 value = av_malloc(count + 1);
249 return AVERROR(ENOMEM);
251 bytestream2_get_bufferu(gb, value, count);
254 av_dict_set(metadata, name, value, AV_DICT_DONT_STRDUP_VAL);
259 int ff_tdecode_header(GetByteContext *gb, int *le, int *ifd_offset)
261 if (bytestream2_get_bytes_left(gb) < 8) {
262 return AVERROR_INVALIDDATA;
265 *le = bytestream2_get_le16u(gb);
266 if (*le == AV_RB16("II")) {
268 } else if (*le == AV_RB16("MM")) {
271 return AVERROR_INVALIDDATA;
274 if (ff_tget_short(gb, *le) != 42) {
275 return AVERROR_INVALIDDATA;
278 *ifd_offset = ff_tget_long(gb, *le);
284 int ff_tread_tag(GetByteContext *gb, int le, unsigned *tag, unsigned *type,
285 unsigned *count, int *next)
290 *tag = ff_tget_short(gb, le);
291 *type = ff_tget_short(gb, le);
292 *count = ff_tget_long (gb, le);
294 ifd_tag = ff_tis_ifd(*tag);
295 valid_type = *type != 0 && *type < FF_ARRAY_ELEMS(type_sizes);
297 *next = bytestream2_tell(gb) + 4;
299 // check for valid type
301 return AVERROR_INVALIDDATA;
304 // seek to offset if this is an IFD-tag or
305 // if count values do not fit into the offset value
306 if (ifd_tag || (*count > 4 || !(type_sizes[*type] * (*count) <= 4 || *type == TIFF_STRING))) {
307 bytestream2_seek(gb, ff_tget_long (gb, le), SEEK_SET);