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 unsigned v = le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);
50 unsigned ff_tget_long(GetByteContext *gb, int le)
52 unsigned v = le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);
57 double ff_tget_double(GetByteContext *gb, int le)
59 av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)};
64 unsigned ff_tget(GetByteContext *gb, int type, int le)
68 return bytestream2_get_byte(gb);
70 return ff_tget_short(gb, le);
72 return ff_tget_long(gb, le);
79 int ff_tadd_rational_metadata(int count, const char *name, const char *sep,
80 GetByteContext *gb, int le, AVDictionary **metadata)
87 if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
88 return AVERROR_INVALIDDATA;
89 if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t))
90 return AVERROR_INVALIDDATA;
93 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_AUTOMATIC);
95 for (i = 0; i < count; i++) {
96 nom = ff_tget_long(gb, le);
97 denom = ff_tget_long(gb, le);
98 av_bprintf(&bp, "%s%i:%i", (i ? sep : ""), nom, denom);
101 if ((i = av_bprint_finalize(&bp, &ap))) {
105 return AVERROR(ENOMEM);
108 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
114 int ff_tadd_long_metadata(int count, const char *name, const char *sep,
115 GetByteContext *gb, int le, AVDictionary **metadata)
121 if (count >= INT_MAX / sizeof(int32_t) || count <= 0)
122 return AVERROR_INVALIDDATA;
123 if (bytestream2_get_bytes_left(gb) < count * sizeof(int32_t))
124 return AVERROR_INVALIDDATA;
125 if (!sep) sep = ", ";
127 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_AUTOMATIC);
129 for (i = 0; i < count; i++) {
130 av_bprintf(&bp, "%s%i", (i ? sep : ""), ff_tget_long(gb, le));
133 if ((i = av_bprint_finalize(&bp, &ap))) {
137 return AVERROR(ENOMEM);
140 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
146 int ff_tadd_doubles_metadata(int count, const char *name, const char *sep,
147 GetByteContext *gb, int le, AVDictionary **metadata)
153 if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
154 return AVERROR_INVALIDDATA;
155 if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t))
156 return AVERROR_INVALIDDATA;
157 if (!sep) sep = ", ";
159 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_AUTOMATIC);
161 for (i = 0; i < count; i++) {
162 av_bprintf(&bp, "%s%f", (i ? sep : ""), 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;
189 if (!sep) sep = ", ";
191 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_AUTOMATIC);
193 for (i = 0; i < count; i++) {
194 av_bprintf(&bp, "%s%i", (i ? sep : ""), ff_tget_short(gb, le));
197 if ((i = av_bprint_finalize(&bp, &ap))) {
201 return AVERROR(ENOMEM);
204 av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
210 int ff_tadd_string_metadata(int count, const char *name,
211 GetByteContext *gb, int le, AVDictionary **metadata)
215 if (bytestream2_get_bytes_left(gb) < count || count < 0)
216 return AVERROR_INVALIDDATA;
218 value = av_malloc(count + 1);
220 return AVERROR(ENOMEM);
222 bytestream2_get_bufferu(gb, value, count);
225 av_dict_set(metadata, name, value, AV_DICT_DONT_STRDUP_VAL);
230 int ff_tdecode_header(GetByteContext *gb, int *le, int *ifd_offset)
232 if (bytestream2_get_bytes_left(gb) < 8) {
233 return AVERROR_INVALIDDATA;
236 *le = bytestream2_get_le16u(gb);
237 if (*le == AV_RB16("II")) {
239 } else if (*le == AV_RB16("MM")) {
242 return AVERROR_INVALIDDATA;
245 if (ff_tget_short(gb, *le) != 42) {
246 return AVERROR_INVALIDDATA;
249 *ifd_offset = ff_tget_long(gb, *le);
255 int ff_tread_tag(GetByteContext *gb, int le, unsigned *tag, unsigned *type,
256 unsigned *count, int *next)
261 *tag = ff_tget_short(gb, le);
262 *type = ff_tget_short(gb, le);
263 *count = ff_tget_long (gb, le);
265 ifd_tag = ff_tis_ifd(*tag);
266 valid_type = *type != 0 && *type < FF_ARRAY_ELEMS(type_sizes);
268 *next = bytestream2_tell(gb) + 4;
270 // check for valid type
272 return AVERROR_INVALIDDATA;
275 // seek to offset if this is an IFD-tag or
276 // if count values do not fit into the offset value
277 if (ifd_tag || (*count > 4 || !(type_sizes[*type] * (*count) <= 4 || *type == TIFF_STRING))) {
278 bytestream2_seek(gb, ff_tget_long (gb, le), SEEK_SET);