FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/tiff_common.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 84 115 73.0%
Branches: 63 100 63.0%

Line Branch Exec Source
1 /*
2 * TIFF Common Routines
3 * Copyright (c) 2013 Thilo Borgmann <thilo.borgmann _at_ mail.de>
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 <thilo.borgmann _at_ mail.de>
26 */
27
28 #include "libavutil/bprint.h"
29 #include "tiff_common.h"
30
31
32 795 int ff_tis_ifd(unsigned tag)
33 {
34 int i;
35
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3100 for (i = 0; i < FF_ARRAY_ELEMS(ifd_tags); i++) {
36
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2337 if (ifd_tags[i] == tag) {
37 32 return i + 1;
38 }
39 }
40 763 return 0;
41 }
42
43
44 1443 unsigned ff_tget_short(GetByteContext *gb, int le)
45 {
46
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1443 return le ? bytestream2_get_le16(gb) : bytestream2_get_be16(gb);
47 }
48
49
50 2503 unsigned ff_tget_long(GetByteContext *gb, int le)
51 {
52
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2503 return le ? bytestream2_get_le32(gb) : bytestream2_get_be32(gb);
53 }
54
55
56 double ff_tget_double(GetByteContext *gb, int le)
57 {
58 av_alias64 i = { .u64 = le ? bytestream2_get_le64(gb) : bytestream2_get_be64(gb)};
59 return i.f64;
60 }
61
62
63 1689 unsigned ff_tget(GetByteContext *gb, int type, int le)
64 {
65
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1689 switch (type) {
66 case TIFF_BYTE: return bytestream2_get_byte(gb);
67 173 case TIFF_SHORT: return ff_tget_short(gb, le);
68 1516 case TIFF_LONG: return ff_tget_long(gb, le);
69 default: return UINT_MAX;
70 }
71 }
72
73 10302 static const char *auto_sep(int count, const char *sep, int i, int columns)
74 {
75
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10302 if (sep)
76
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4 return i ? sep : "";
77
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10298 if (i && i%columns) {
78 9488 return ", ";
79 } else
80
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810 return columns < count ? "\n" : "";
81 }
82
83 188 static int bprint_to_avdict(AVBPrint *bp, const char *name,
84 AVDictionary **metadata)
85 {
86 char *ap;
87 int ret;
88
89
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188 if (!av_bprint_is_complete(bp)) {
90 av_bprint_finalize(bp, NULL);
91 return AVERROR(ENOMEM);
92 }
93
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188 if ((ret = av_bprint_finalize(bp, &ap)) < 0)
94 return ret;
95
96 188 return av_dict_set(metadata, name, ap, AV_DICT_DONT_STRDUP_VAL);
97 }
98
99 56 int ff_tadd_rational_metadata(int count, const char *name, const char *sep,
100 GetByteContext *gb, int le, AVDictionary **metadata)
101 {
102 AVBPrint bp;
103 int32_t nom, denom;
104 int i;
105
106
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56 if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
107 return AVERROR_INVALIDDATA;
108
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56 if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t))
109 return AVERROR_INVALIDDATA;
110
111 56 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
112
113
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112 for (i = 0; i < count; i++) {
114 56 nom = ff_tget_long(gb, le);
115 56 denom = ff_tget_long(gb, le);
116 56 av_bprintf(&bp, "%s%7"PRId32":%-7"PRId32, auto_sep(count, sep, i, 4), nom, denom);
117 }
118
119 56 return bprint_to_avdict(&bp, name, metadata);
120 }
121
122
123 20 int ff_tadd_long_metadata(int count, const char *name, const char *sep,
124 GetByteContext *gb, int le, AVDictionary **metadata)
125 {
126 AVBPrint bp;
127 int i;
128
129
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20 if (count >= INT_MAX / sizeof(int32_t) || count <= 0)
130 return AVERROR_INVALIDDATA;
131
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20 if (bytestream2_get_bytes_left(gb) < count * sizeof(int32_t))
132 return AVERROR_INVALIDDATA;
133
134 20 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
135
136
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40 for (i = 0; i < count; i++) {
137 20 av_bprintf(&bp, "%s%7i", auto_sep(count, sep, i, 8), ff_tget_long(gb, le));
138 }
139
140 20 return bprint_to_avdict(&bp, name, metadata);
141 }
142
143
144 int ff_tadd_doubles_metadata(int count, const char *name, const char *sep,
145 GetByteContext *gb, int le, AVDictionary **metadata)
146 {
147 AVBPrint bp;
148 int i;
149
150 if (count >= INT_MAX / sizeof(int64_t) || count <= 0)
151 return AVERROR_INVALIDDATA;
152 if (bytestream2_get_bytes_left(gb) < count * sizeof(int64_t))
153 return AVERROR_INVALIDDATA;
154
155 av_bprint_init(&bp, 10 * count, 100 * count);
156
157 for (i = 0; i < count; i++) {
158 av_bprintf(&bp, "%s%.15g", auto_sep(count, sep, i, 4), ff_tget_double(gb, le));
159 }
160
161 return bprint_to_avdict(&bp, name, metadata);
162 }
163
164
165 76 int ff_tadd_shorts_metadata(int count, const char *name, const char *sep,
166 GetByteContext *gb, int le, int is_signed, AVDictionary **metadata)
167 {
168 AVBPrint bp;
169 int i;
170
171
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76 if (count >= INT_MAX / sizeof(int16_t) || count <= 0)
172 return AVERROR_INVALIDDATA;
173
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76 if (bytestream2_get_bytes_left(gb) < count * sizeof(int16_t))
174 return AVERROR_INVALIDDATA;
175
176 76 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
177
178
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154 for (i = 0; i < count; i++) {
179
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78 int v = is_signed ? (int16_t)ff_tget_short(gb, le) : ff_tget_short(gb, le);
180 78 av_bprintf(&bp, "%s%5i", auto_sep(count, sep, i, 8), v);
181 }
182
183 76 return bprint_to_avdict(&bp, name, metadata);
184 }
185
186
187 36 int ff_tadd_bytes_metadata(int count, const char *name, const char *sep,
188 GetByteContext *gb, int le, int is_signed, AVDictionary **metadata)
189 {
190 AVBPrint bp;
191 int i;
192
193
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36 if (count >= INT_MAX / sizeof(int8_t) || count < 0)
194 return AVERROR_INVALIDDATA;
195
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36 if (bytestream2_get_bytes_left(gb) < count * sizeof(int8_t))
196 return AVERROR_INVALIDDATA;
197
198 36 av_bprint_init(&bp, 10 * count, AV_BPRINT_SIZE_UNLIMITED);
199
200
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10184 for (i = 0; i < count; i++) {
201
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10148 int v = is_signed ? (int8_t)bytestream2_get_byte(gb) : bytestream2_get_byte(gb);
202 10148 av_bprintf(&bp, "%s%3i", auto_sep(count, sep, i, 16), v);
203 }
204
205 36 return bprint_to_avdict(&bp, name, metadata);
206 }
207
208 58 int ff_tadd_string_metadata(int count, const char *name,
209 GetByteContext *gb, int le, AVDictionary **metadata)
210 {
211 char *value;
212
213
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58 if (bytestream2_get_bytes_left(gb) < count || count < 0)
214 return AVERROR_INVALIDDATA;
215
216 58 value = av_malloc(count + 1);
217
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58 if (!value)
218 return AVERROR(ENOMEM);
219
220 58 bytestream2_get_bufferu(gb, value, count);
221 58 value[count] = 0;
222
223 58 av_dict_set(metadata, name, value, AV_DICT_DONT_STRDUP_VAL);
224 58 return 0;
225 }
226
227
228 41 int ff_tdecode_header(GetByteContext *gb, int *le, int *ifd_offset)
229 {
230
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41 if (bytestream2_get_bytes_left(gb) < 8) {
231 return AVERROR_INVALIDDATA;
232 }
233
234 41 *le = bytestream2_get_le16u(gb);
235
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41 if (*le == AV_RB16("II")) {
236 27 *le = 1;
237
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14 } else if (*le == AV_RB16("MM")) {
238 14 *le = 0;
239 } else {
240 return AVERROR_INVALIDDATA;
241 }
242
243
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41 if (ff_tget_short(gb, *le) != 42) {
244 return AVERROR_INVALIDDATA;
245 }
246
247 41 *ifd_offset = ff_tget_long(gb, *le);
248
249 41 return 0;
250 }
251
252
253 547 int ff_tread_tag(GetByteContext *gb, int le, unsigned *tag, unsigned *type,
254 unsigned *count, int *next)
255 {
256 int ifd_tag;
257 int valid_type;
258
259 547 *tag = ff_tget_short(gb, le);
260 547 *type = ff_tget_short(gb, le);
261 547 *count = ff_tget_long (gb, le);
262
263 547 ifd_tag = ff_tis_ifd(*tag);
264
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547 valid_type = *type != 0 && *type < FF_ARRAY_ELEMS(type_sizes);
265
266 547 *next = bytestream2_tell(gb) + 4;
267
268 // check for valid type
269
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547 if (!valid_type) {
270 return AVERROR_INVALIDDATA;
271 }
272
273 // seek to offset if this is an IFD-tag or
274 // if count values do not fit into the offset value
275
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547 if (ifd_tag || (*count > 4 || !(type_sizes[*type] * (*count) <= 4 || *type == TIFF_STRING))) {
276 231 bytestream2_seek(gb, ff_tget_long (gb, le), SEEK_SET);
277 }
278
279 547 return 0;
280 }
281