Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
6148 | serge | 1 | /* |
2 | * TIFF Common Routines |
||
3 | * Copyright (c) 2013 Thilo Borgmann |
||
4 | * |
||
5 | * This file is part of FFmpeg. |
||
6 | * |
||
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. |
||
11 | * |
||
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. |
||
16 | * |
||
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 |
||
20 | */ |
||
21 | |||
22 | /** |
||
23 | * @file |
||
24 | * TIFF Common Routines |
||
25 | * @author Thilo Borgmann |
||
26 | */ |
||
27 | |||
28 | #include "tiff_common.h" |
||
29 | |||
30 | |||
31 | int ff_tis_ifd(unsigned tag) |
||
32 | { |
||
33 | int i; |
||
34 | for (i = 0; i < FF_ARRAY_ELEMS(ifd_tags); i++) { |
||
35 | if (ifd_tags[i] == tag) { |
||
36 | return i + 1; |
||
37 | } |
||
38 | } |
||
39 | return 0; |
||
40 | } |
||
41 | |||
42 | |||
43 | unsigned ff_tget_short(GetByteContext *gb, int le) |
||
44 | { |
||
45 | unsigned v = le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb); |
||
46 | return v; |
||
47 | } |
||
48 | |||
49 | |||
50 | unsigned ff_tget_long(GetByteContext *gb, int le) |
||
51 | { |
||
52 | unsigned v = le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb); |
||
53 | return v; |
||
54 | } |
||
55 | |||
56 | |||
57 | double ff_tget_double(GetByteContext *gb, int le) |
||
58 | { |
||
59 | av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)}; |
||
60 | return i.f64; |
||
61 | } |
||
62 | |||
63 | |||
64 | unsigned ff_tget(GetByteContext *gb, int type, int le) |
||
65 | { |
||
66 | switch (type) { |
||
67 | case TIFF_BYTE: |
||
68 | return bytestream2_get_byte(gb); |
||
69 | case TIFF_SHORT: |
||
70 | return ff_tget_short(gb, le); |
||
71 | case TIFF_LONG: |
||
72 | return ff_tget_long(gb, le); |
||
73 | default: |
||
74 | return UINT_MAX; |
||
75 | } |
||
76 | } |
||
77 | |||
78 | static char *auto_sep(int count, char *sep, int i, int columns) |
||
79 | { |
||
80 | if (sep) |
||
81 | return i ? sep : ""; |
||
82 | if (i && i%columns) { |
||
83 | return ", "; |
||
84 | } else |
||
85 | return columns < count ? "\n" : ""; |
||
86 | } |
||
87 | |||
88 | int ff_tadd_rational_metadata(int count, const char *name, const char *sep, |
||
89 | GetByteContext *gb, int le, AVDictionary **metadata) |
||
90 | { |
||
91 | AVBPrint bp; |
||
92 | char *ap; |
||
93 | int32_t nom, denom; |
||
94 | int i; |
||
95 | |||
96 | if (count >= INT_MAX / sizeof(int64_t) || count <= 0) |
||
97 | return AVERROR_INVALIDDATA; |
||
98 | if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t)) |
||
99 | return AVERROR_INVALIDDATA; |
||
100 | |||
101 | av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED); |
||
102 | |||
103 | for (i = 0; i < count; i++) { |
||
104 | nom = ff_tget_long(gb, le); |
||
105 | denom = ff_tget_long(gb, le); |
||
106 | av_bprintf(&bp, "%s%7i:%-7i", auto_sep(count, sep, i, 4), nom, denom); |
||
107 | } |
||
108 | |||
109 | if ((i = av_bprint_finalize(&bp, &ap))) { |
||
110 | return i; |
||
111 | } |
||
112 | if (!ap) { |
||
113 | return AVERROR(ENOMEM); |
||
114 | } |
||
115 | |||
116 | av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL); |
||
117 | |||
118 | return 0; |
||
119 | } |
||
120 | |||
121 | |||
122 | int ff_tadd_long_metadata(int count, const char *name, const char *sep, |
||
123 | GetByteContext *gb, int le, AVDictionary **metadata) |
||
124 | { |
||
125 | AVBPrint bp; |
||
126 | char *ap; |
||
127 | int i; |
||
128 | |||
129 | if (count >= INT_MAX / sizeof(int32_t) || count <= 0) |
||
130 | return AVERROR_INVALIDDATA; |
||
131 | if (bytestream2_get_bytes_left(gb) < count * sizeof(int32_t)) |
||
132 | return AVERROR_INVALIDDATA; |
||
133 | |||
134 | av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED); |
||
135 | |||
136 | for (i = 0; i < count; i++) { |
||
137 | av_bprintf(&bp, "%s%7i", auto_sep(count, sep, i, 8), ff_tget_long(gb, le)); |
||
138 | } |
||
139 | |||
140 | if ((i = av_bprint_finalize(&bp, &ap))) { |
||
141 | return i; |
||
142 | } |
||
143 | if (!ap) { |
||
144 | return AVERROR(ENOMEM); |
||
145 | } |
||
146 | |||
147 | av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL); |
||
148 | |||
149 | return 0; |
||
150 | } |
||
151 | |||
152 | |||
153 | int ff_tadd_doubles_metadata(int count, const char *name, const char *sep, |
||
154 | GetByteContext *gb, int le, AVDictionary **metadata) |
||
155 | { |
||
156 | AVBPrint bp; |
||
157 | char *ap; |
||
158 | int i; |
||
159 | |||
160 | if (count >= INT_MAX / sizeof(int64_t) || count <= 0) |
||
161 | return AVERROR_INVALIDDATA; |
||
162 | if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t)) |
||
163 | return AVERROR_INVALIDDATA; |
||
164 | |||
165 | av_bprint_init(&bp, 10 * count, 100 * count); |
||
166 | |||
167 | for (i = 0; i < count; i++) { |
||
168 | av_bprintf(&bp, "%s%f", auto_sep(count, sep, i, 4), ff_tget_double(gb, le)); |
||
169 | } |
||
170 | |||
171 | if ((i = av_bprint_finalize(&bp, &ap))) { |
||
172 | return i; |
||
173 | } |
||
174 | if (!ap) { |
||
175 | return AVERROR(ENOMEM); |
||
176 | } |
||
177 | |||
178 | av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL); |
||
179 | |||
180 | return 0; |
||
181 | } |
||
182 | |||
183 | |||
184 | int ff_tadd_shorts_metadata(int count, const char *name, const char *sep, |
||
185 | GetByteContext *gb, int le, AVDictionary **metadata) |
||
186 | { |
||
187 | AVBPrint bp; |
||
188 | char *ap; |
||
189 | int i; |
||
190 | |||
191 | if (count >= INT_MAX / sizeof(int16_t) || count <= 0) |
||
192 | return AVERROR_INVALIDDATA; |
||
193 | if (bytestream2_get_bytes_left(gb) < count * sizeof(int16_t)) |
||
194 | return AVERROR_INVALIDDATA; |
||
195 | |||
196 | av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED); |
||
197 | |||
198 | for (i = 0; i < count; i++) { |
||
199 | av_bprintf(&bp, "%s%5i", auto_sep(count, sep, i, 8), ff_tget_short(gb, le)); |
||
200 | } |
||
201 | |||
202 | if ((i = av_bprint_finalize(&bp, &ap))) { |
||
203 | return i; |
||
204 | } |
||
205 | if (!ap) { |
||
206 | return AVERROR(ENOMEM); |
||
207 | } |
||
208 | |||
209 | av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL); |
||
210 | |||
211 | return 0; |
||
212 | } |
||
213 | |||
214 | |||
215 | int ff_tadd_bytes_metadata(int count, const char *name, const char *sep, |
||
216 | GetByteContext *gb, int le, AVDictionary **metadata) |
||
217 | { |
||
218 | AVBPrint bp; |
||
219 | char *ap; |
||
220 | int i; |
||
221 | |||
222 | if (count >= INT_MAX / sizeof(int8_t) || count < 0) |
||
223 | return AVERROR_INVALIDDATA; |
||
224 | if (bytestream2_get_bytes_left(gb) < count * sizeof(int8_t)) |
||
225 | return AVERROR_INVALIDDATA; |
||
226 | |||
227 | av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED); |
||
228 | |||
229 | for (i = 0; i < count; i++) { |
||
230 | av_bprintf(&bp, "%s%3i", auto_sep(count, sep, i, 16), bytestream2_get_byte(gb)); |
||
231 | } |
||
232 | |||
233 | if ((i = av_bprint_finalize(&bp, &ap))) { |
||
234 | return i; |
||
235 | } |
||
236 | if (!ap) { |
||
237 | return AVERROR(ENOMEM); |
||
238 | } |
||
239 | |||
240 | av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL); |
||
241 | |||
242 | return 0; |
||
243 | } |
||
244 | |||
245 | int ff_tadd_string_metadata(int count, const char *name, |
||
246 | GetByteContext *gb, int le, AVDictionary **metadata) |
||
247 | { |
||
248 | char *value; |
||
249 | |||
250 | if (bytestream2_get_bytes_left(gb) < count || count < 0) |
||
251 | return AVERROR_INVALIDDATA; |
||
252 | |||
253 | value = av_malloc(count + 1); |
||
254 | if (!value) |
||
255 | return AVERROR(ENOMEM); |
||
256 | |||
257 | bytestream2_get_bufferu(gb, value, count); |
||
258 | value[count] = 0; |
||
259 | |||
260 | av_dict_set(metadata, name, value, AV_DICT_DONT_STRDUP_VAL); |
||
261 | return 0; |
||
262 | } |
||
263 | |||
264 | |||
265 | int ff_tdecode_header(GetByteContext *gb, int *le, int *ifd_offset) |
||
266 | { |
||
267 | if (bytestream2_get_bytes_left(gb) < 8) { |
||
268 | return AVERROR_INVALIDDATA; |
||
269 | } |
||
270 | |||
271 | *le = bytestream2_get_le16u(gb); |
||
272 | if (*le == AV_RB16("II")) { |
||
273 | *le = 1; |
||
274 | } else if (*le == AV_RB16("MM")) { |
||
275 | *le = 0; |
||
276 | } else { |
||
277 | return AVERROR_INVALIDDATA; |
||
278 | } |
||
279 | |||
280 | if (ff_tget_short(gb, *le) != 42) { |
||
281 | return AVERROR_INVALIDDATA; |
||
282 | } |
||
283 | |||
284 | *ifd_offset = ff_tget_long(gb, *le); |
||
285 | |||
286 | return 0; |
||
287 | } |
||
288 | |||
289 | |||
290 | int ff_tread_tag(GetByteContext *gb, int le, unsigned *tag, unsigned *type, |
||
291 | unsigned *count, int *next) |
||
292 | { |
||
293 | int ifd_tag; |
||
294 | int valid_type; |
||
295 | |||
296 | *tag = ff_tget_short(gb, le); |
||
297 | *type = ff_tget_short(gb, le); |
||
298 | *count = ff_tget_long (gb, le); |
||
299 | |||
300 | ifd_tag = ff_tis_ifd(*tag); |
||
301 | valid_type = *type != 0 && *type < FF_ARRAY_ELEMS(type_sizes); |
||
302 | |||
303 | *next = bytestream2_tell(gb) + 4; |
||
304 | |||
305 | // check for valid type |
||
306 | if (!valid_type) { |
||
307 | return AVERROR_INVALIDDATA; |
||
308 | } |
||
309 | |||
310 | // seek to offset if this is an IFD-tag or |
||
311 | // if count values do not fit into the offset value |
||
312 | if (ifd_tag || (*count > 4 || !(type_sizes[*type] * (*count) <= 4 || *type == TIFF_STRING))) { |
||
313 | bytestream2_seek(gb, ff_tget_long (gb, le), SEEK_SET); |
||
314 | } |
||
315 | |||
316 | return 0; |
||
317 | }=>>>>>>>>>>=>>>=>>>=>>>=>>> |