FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/id3v2.c
Date: 2025-03-08 20:38:41
Exec Total Coverage
Lines: 471 662 71.1%
Functions: 32 33 97.0%
Branches: 265 455 58.2%
Line Branch Exec Source
1 /*
2 * Copyright (c) 2003 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21 /**
22 * @file
23 * ID3v2 header parser
24 *
25 * Specifications available at:
26 * http://id3.org/Developer_Information
27 */
28
29 #include "config.h"
30
31 #if CONFIG_ZLIB
32 #include <zlib.h>
33 #endif
34
35 #include "libavutil/avstring.h"
36 #include "libavutil/bprint.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/intreadwrite.h"
39 #include "libavutil/mem.h"
40 #include "libavcodec/png.h"
41 #include "avio_internal.h"
42 #include "demux.h"
43 #include "id3v1.h"
44 #include "id3v2.h"
45
46 const AVMetadataConv ff_id3v2_34_metadata_conv[] = {
47 { "TALB", "album" },
48 { "TCOM", "composer" },
49 { "TCON", "genre" },
50 { "TCOP", "copyright" },
51 { "TENC", "encoded_by" },
52 { "TIT2", "title" },
53 { "TLAN", "language" },
54 { "TPE1", "artist" },
55 { "TPE2", "album_artist" },
56 { "TPE3", "performer" },
57 { "TPOS", "disc" },
58 { "TPUB", "publisher" },
59 { "TRCK", "track" },
60 { "TSSE", "encoder" },
61 { "USLT", "lyrics" },
62 { 0 }
63 };
64
65 const AVMetadataConv ff_id3v2_4_metadata_conv[] = {
66 { "TCMP", "compilation" },
67 { "TDRC", "date" },
68 { "TDRL", "date" },
69 { "TDEN", "creation_time" },
70 { "TSOA", "album-sort" },
71 { "TSOP", "artist-sort" },
72 { "TSOT", "title-sort" },
73 { "TIT1", "grouping" },
74 { 0 }
75 };
76
77 static const AVMetadataConv id3v2_2_metadata_conv[] = {
78 { "TAL", "album" },
79 { "TCO", "genre" },
80 { "TCP", "compilation" },
81 { "TT2", "title" },
82 { "TEN", "encoded_by" },
83 { "TP1", "artist" },
84 { "TP2", "album_artist" },
85 { "TP3", "performer" },
86 { "TRK", "track" },
87 { 0 }
88 };
89
90 const char ff_id3v2_tags[][4] = {
91 "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
92 "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
93 "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
94 "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
95 { 0 },
96 };
97
98 const char ff_id3v2_4_tags[][4] = {
99 "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
100 "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
101 { 0 },
102 };
103
104 const char ff_id3v2_3_tags[][4] = {
105 "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
106 { 0 },
107 };
108
109 const char * const ff_id3v2_picture_types[21] = {
110 "Other",
111 "32x32 pixels 'file icon'",
112 "Other file icon",
113 "Cover (front)",
114 "Cover (back)",
115 "Leaflet page",
116 "Media (e.g. label side of CD)",
117 "Lead artist/lead performer/soloist",
118 "Artist/performer",
119 "Conductor",
120 "Band/Orchestra",
121 "Composer",
122 "Lyricist/text writer",
123 "Recording Location",
124 "During recording",
125 "During performance",
126 "Movie/video screen capture",
127 "A bright coloured fish",
128 "Illustration",
129 "Band/artist logotype",
130 "Publisher/Studio logotype",
131 };
132
133 const CodecMime ff_id3v2_mime_tags[] = {
134 { "image/gif", AV_CODEC_ID_GIF },
135 { "image/jpeg", AV_CODEC_ID_MJPEG },
136 { "image/jpg", AV_CODEC_ID_MJPEG },
137 { "image/png", AV_CODEC_ID_PNG },
138 { "image/tiff", AV_CODEC_ID_TIFF },
139 { "image/bmp", AV_CODEC_ID_BMP },
140 { "image/webp", AV_CODEC_ID_WEBP },
141 { "JPG", AV_CODEC_ID_MJPEG }, /* ID3v2.2 */
142 { "PNG", AV_CODEC_ID_PNG }, /* ID3v2.2 */
143 { "", AV_CODEC_ID_NONE },
144 };
145
146 26156 int ff_id3v2_match(const uint8_t *buf, const char *magic)
147 {
148 26449 return buf[0] == magic[0] &&
149
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 26567 (buf[8] & 0x80) == 0 &&
156
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 118 (buf[9] & 0x80) == 0;
157 }
158
159 81 int ff_id3v2_tag_len(const uint8_t *buf)
160 {
161 81 int len = ((buf[6] & 0x7f) << 21) +
162 81 ((buf[7] & 0x7f) << 14) +
163 81 ((buf[8] & 0x7f) << 7) +
164 81 (buf[9] & 0x7f) +
165 ID3v2_HEADER_SIZE;
166
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 81 if (buf[5] & 0x10)
167 ✗ len += ID3v2_HEADER_SIZE;
168 81 return len;
169 }
170
171 ✗ static unsigned int get_size(AVIOContext *s, int len)
172 {
173 ✗ int v = 0;
174 ✗ while (len--)
175 ✗ v = (v << 7) + (avio_r8(s) & 0x7F);
176 ✗ return v;
177 }
178
179 20 static unsigned int size_to_syncsafe(unsigned int size)
180 {
181 20 return (((size) & (0x7f << 0)) >> 0) +
182 20 (((size) & (0x7f << 8)) >> 1) +
183 40 (((size) & (0x7f << 16)) >> 2) +
184 20 (((size) & (0x7f << 24)) >> 3);
185 }
186
187 /* No real verification, only check that the tag consists of
188 * a combination of capital alpha-numerical characters */
189 4 static int is_tag(const char *buf, unsigned int len)
190 {
191
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 4 if (!len)
192 ✗ return 0;
193
194
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 20 while (len--)
195
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 16 if ((buf[len] < 'A' ||
196
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 16 buf[len] > 'Z') &&
197 ✗ (buf[len] < '0' ||
198 ✗ buf[len] > '9'))
199 ✗ return 0;
200
201 4 return 1;
202 }
203
204 /**
205 * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
206 */
207 4 static int check_tag(AVIOContext *s, int offset, unsigned int len)
208 {
209 char tag[4];
210
211
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 8 if (len > 4 ||
212 4 avio_seek(s, offset, SEEK_SET) < 0 ||
213
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 4 avio_read(s, tag, len) < (int)len)
214 ✗ return -1;
215
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 4 else if (!AV_RB32(tag) || is_tag(tag, len))
216 4 return 1;
217
218 ✗ return 0;
219 }
220
221 /**
222 * Free GEOB type extra metadata.
223 */
224 2 static void free_geobtag(void *obj)
225 {
226 2 ID3v2ExtraMetaGEOB *geob = obj;
227 2 av_freep(&geob->mime_type);
228 2 av_freep(&geob->file_name);
229 2 av_freep(&geob->description);
230 2 av_freep(&geob->data);
231 2 }
232
233 /**
234 * Decode characters to UTF-8 according to encoding type. The decoded buffer is
235 * always null terminated. Stop reading when either *maxread bytes are read from
236 * pb or U+0000 character is found.
237 *
238 * @param dst Pointer where the address of the buffer with the decoded bytes is
239 * stored. Buffer must be freed by caller.
240 * @param maxread Pointer to maximum number of characters to read from the
241 * AVIOContext. After execution the value is decremented by the number of bytes
242 * actually read.
243 * @returns 0 if no error occurred, dst is uninitialized on error
244 */
245 258 static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
246 uint8_t **dst, int *maxread)
247 {
248 int ret;
249 uint8_t tmp;
250 258 uint32_t ch = 1;
251 258 int left = *maxread, dynsize;
252 258 unsigned int (*get)(AVIOContext*) = avio_rb16;
253 AVIOContext *dynbuf;
254
255
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 258 if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
256 ✗ av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
257 ✗ return ret;
258 }
259
260
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 258 switch (encoding) {
261 89 case ID3v2_ENCODING_ISO8859:
262
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 864 while (left && ch) {
263 775 ch = avio_r8(pb);
264
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 776 PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
265 775 left--;
266 }
267 89 break;
268
269 8 case ID3v2_ENCODING_UTF16BOM:
270
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 8 if ((left -= 2) < 0) {
271 ✗ av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n");
272 ✗ ffio_free_dyn_buf(&dynbuf);
273 ✗ *dst = NULL;
274 ✗ return AVERROR_INVALIDDATA;
275 }
276
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 8 switch (avio_rb16(pb)) {
277 8 case 0xfffe:
278 8 get = avio_rl16;
279 8 case 0xfeff:
280 8 break;
281 ✗ default:
282 ✗ av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
283 ✗ ffio_free_dyn_buf(&dynbuf);
284 ✗ *dst = NULL;
285 ✗ *maxread = left;
286 ✗ return AVERROR_INVALIDDATA;
287 }
288 // fall-through
289
290 case ID3v2_ENCODING_UTF16BE:
291
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 223 while ((left > 1) && ch) {
292
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 197 GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
293
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 261 PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
294 }
295
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 26 if (left < 0)
296 ✗ left += 2; /* did not read last char from pb */
297 26 break;
298
299 143 case ID3v2_ENCODING_UTF8:
300
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 1658 while (left && ch) {
301 1515 ch = avio_r8(pb);
302 1515 avio_w8(dynbuf, ch);
303 1515 left--;
304 }
305 143 break;
306 ✗ default:
307 ✗ av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
308 }
309
310
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 258 if (ch)
311 22 avio_w8(dynbuf, 0);
312
313 258 dynsize = avio_close_dyn_buf(dynbuf, dst);
314
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 258 if (dynsize <= 0) {
315 ✗ av_freep(dst);
316 ✗ return AVERROR(ENOMEM);
317 }
318 258 *maxread = left;
319
320 258 return 0;
321 }
322
323 /**
324 * Parse a text tag.
325 */
326 165 static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
327 AVDictionary **metadata, const char *key)
328 {
329 uint8_t *dst;
330 165 int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
331 unsigned genre;
332
333
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 165 if (taglen < 1)
334 ✗ return;
335
336 165 encoding = avio_r8(pb);
337 165 taglen--; /* account for encoding type byte */
338
339
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 165 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
340 ✗ av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
341 ✗ return;
342 }
343
344
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 165 if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
345
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 13 (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
346 ✗ genre <= ID3v1_GENRE_MAX) {
347 ✗ av_freep(&dst);
348 ✗ dst = av_strdup(ff_id3v1_genre_str[genre]);
349
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 165 } else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
350 /* dst now contains the key, need to get value */
351 27 key = dst;
352
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 27 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
353 ✗ av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
354 ✗ av_freep(&key);
355 ✗ return;
356 }
357 27 dict_flags |= AV_DICT_DONT_STRDUP_KEY;
358
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 138 } else if (!*dst)
359 4 av_freep(&dst);
360
361
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 165 if (dst)
362 161 av_dict_set(metadata, key, dst, dict_flags);
363 }
364
365 1 static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
366 AVDictionary **metadata)
367 {
368 uint8_t lang[4];
369 1 uint8_t *descriptor = NULL; // 'Content descriptor'
370 uint8_t *text;
371 char *key;
372 int encoding;
373 1 int ok = 0;
374
375
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 1 if (taglen < 4)
376 ✗ goto error;
377
378 1 encoding = avio_r8(pb);
379 1 taglen--;
380
381
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 1 if (avio_read(pb, lang, 3) < 3)
382 ✗ goto error;
383 1 lang[3] = '\0';
384 1 taglen -= 3;
385
386
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 1 if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0 || taglen < 0)
387 ✗ goto error;
388
389
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 1 if (decode_str(s, pb, encoding, &text, &taglen) < 0 || taglen < 0)
390 ✗ goto error;
391
392 // FFmpeg does not support hierarchical metadata, so concatenate the keys.
393
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 1 key = av_asprintf("lyrics-%s%s%s", descriptor[0] ? (char *)descriptor : "",
394
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 1 descriptor[0] ? "-" : "",
395 lang);
396
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 1 if (!key) {
397 ✗ av_free(text);
398 ✗ goto error;
399 }
400
401 1 av_dict_set(metadata, key, text,
402 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
403
404 1 ok = 1;
405 1 error:
406
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 1 if (!ok)
407 ✗ av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
408 1 av_free(descriptor);
409 1 }
410
411 /**
412 * Parse a comment tag.
413 */
414 7 static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
415 AVDictionary **metadata)
416 {
417 7 const char *key = "comment";
418 uint8_t *dst;
419 7 int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
420 av_unused int language;
421
422
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 7 if (taglen < 4)
423 ✗ return;
424
425 7 encoding = avio_r8(pb);
426 7 language = avio_rl24(pb);
427 7 taglen -= 4;
428
429
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 7 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
430 ✗ av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
431 ✗ return;
432 }
433
434
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 7 if (dst && !*dst)
435 2 av_freep(&dst);
436
437
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 7 if (dst) {
438 5 key = (const char *) dst;
439 5 dict_flags |= AV_DICT_DONT_STRDUP_KEY;
440 }
441
442
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 7 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
443 ✗ av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
444 ✗ if (dict_flags & AV_DICT_DONT_STRDUP_KEY)
445 ✗ av_freep((void*)&key);
446 ✗ return;
447 }
448
449
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 7 if (dst)
450 7 av_dict_set(metadata, key, (const char *) dst, dict_flags);
451 }
452
453 typedef struct ExtraMetaList {
454 ID3v2ExtraMeta *head, *tail;
455 } ExtraMetaList;
456
457 46 static void list_append(ID3v2ExtraMeta *new_elem, ExtraMetaList *list)
458 {
459
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 46 if (list->tail)
460 23 list->tail->next = new_elem;
461 else
462 23 list->head = new_elem;
463 46 list->tail = new_elem;
464 46 }
465
466 /**
467 * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
468 */
469 2 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
470 const char *tag, ExtraMetaList *extra_meta, int isv34)
471 {
472 2 ID3v2ExtraMetaGEOB *geob_data = NULL;
473 2 ID3v2ExtraMeta *new_extra = NULL;
474 char encoding;
475 unsigned int len;
476
477
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 2 if (taglen < 1)
478 ✗ return;
479
480 2 new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
481
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 2 if (!new_extra) {
482 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
483 sizeof(ID3v2ExtraMeta));
484 ✗ return;
485 }
486
487 2 geob_data = &new_extra->data.geob;
488
489 /* read encoding type byte */
490 2 encoding = avio_r8(pb);
491 2 taglen--;
492
493 /* read MIME type (always ISO-8859) */
494
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 2 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
495 2 &taglen) < 0 ||
496
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 2 taglen <= 0)
497 ✗ goto fail;
498
499 /* read file name */
500
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 2 if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
501
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 2 taglen <= 0)
502 ✗ goto fail;
503
504 /* read content description */
505
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 2 if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
506
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 2 taglen < 0)
507 ✗ goto fail;
508
509
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 2 if (taglen) {
510 /* save encapsulated binary data */
511 2 geob_data->data = av_malloc(taglen);
512
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 2 if (!geob_data->data) {
513 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
514 ✗ goto fail;
515 }
516
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 2 if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
517 ✗ av_log(s, AV_LOG_WARNING,
518 "Error reading GEOB frame, data truncated.\n");
519 2 geob_data->datasize = len;
520 } else {
521 ✗ geob_data->data = NULL;
522 ✗ geob_data->datasize = 0;
523 }
524
525 /* add data to the list */
526 2 new_extra->tag = "GEOB";
527 2 list_append(new_extra, extra_meta);
528
529 2 return;
530
531 ✗ fail:
532 ✗ av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
533 ✗ free_geobtag(geob_data);
534 ✗ av_free(new_extra);
535 ✗ return;
536 }
537
538 7 static int is_number(const char *str)
539 {
540
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 35 while (*str >= '0' && *str <= '9')
541 28 str++;
542 7 return !*str;
543 }
544
545 9081 static AVDictionaryEntry *get_date_tag(AVDictionary *m, const char *tag)
546 {
547 AVDictionaryEntry *t;
548
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 9081 if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
549
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 7 strlen(t->value) == 4 && is_number(t->value))
550 7 return t;
551 9074 return NULL;
552 }
553
554 4537 static void merge_date(AVDictionary **m)
555 {
556 AVDictionaryEntry *t;
557 4537 char date[17] = { 0 }; // YYYY-MM-DD hh:mm
558
559
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 9069 if (!(t = get_date_tag(*m, "TYER")) &&
560 4532 !(t = get_date_tag(*m, "TYE")))
561 4532 return;
562 5 av_strlcpy(date, t->value, 5);
563 5 av_dict_set(m, "TYER", NULL, 0);
564 5 av_dict_set(m, "TYE", NULL, 0);
565
566
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 8 if (!(t = get_date_tag(*m, "TDAT")) &&
567 3 !(t = get_date_tag(*m, "TDA")))
568 3 goto finish;
569 2 snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
570 2 av_dict_set(m, "TDAT", NULL, 0);
571 2 av_dict_set(m, "TDA", NULL, 0);
572
573
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 4 if (!(t = get_date_tag(*m, "TIME")) &&
574 2 !(t = get_date_tag(*m, "TIM")))
575 2 goto finish;
576 ✗ snprintf(date + 10, sizeof(date) - 10,
577 ✗ " %.2s:%.2s", t->value, t->value + 2);
578 ✗ av_dict_set(m, "TIME", NULL, 0);
579 ✗ av_dict_set(m, "TIM", NULL, 0);
580
581 5 finish:
582
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 5 if (date[0])
583 5 av_dict_set(m, "date", date, 0);
584 }
585
586 19 static void free_apic(void *obj)
587 {
588 19 ID3v2ExtraMetaAPIC *apic = obj;
589 19 av_buffer_unref(&apic->buf);
590 19 av_freep(&apic->description);
591 19 }
592
593 19 static void rstrip_spaces(char *buf)
594 {
595 19 size_t len = strlen(buf);
596
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 19 while (len > 0 && buf[len - 1] == ' ')
597 ✗ buf[--len] = 0;
598 19 }
599
600 19 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
601 const char *tag, ExtraMetaList *extra_meta, int isv34)
602 {
603 int enc, pic_type;
604 19 char mimetype[64] = {0};
605 19 const CodecMime *mime = ff_id3v2_mime_tags;
606 19 enum AVCodecID id = AV_CODEC_ID_NONE;
607 19 ID3v2ExtraMetaAPIC *apic = NULL;
608 19 ID3v2ExtraMeta *new_extra = NULL;
609 19 int64_t end = avio_tell(pb) + taglen;
610
611
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 19 if (taglen <= 4 || (!isv34 && taglen <= 6))
612 ✗ goto fail;
613
614 19 new_extra = av_mallocz(sizeof(*new_extra));
615
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 19 if (!new_extra)
616 ✗ goto fail;
617
618 19 apic = &new_extra->data.apic;
619
620 19 enc = avio_r8(pb);
621 19 taglen--;
622
623 /* mimetype */
624
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 19 if (isv34) {
625 19 int ret = avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
626
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 19 if (ret < 0 || ret >= taglen)
627 ✗ goto fail;
628 19 taglen -= ret;
629 } else {
630 ✗ if (avio_read(pb, mimetype, 3) < 0)
631 ✗ goto fail;
632
633 ✗ mimetype[3] = 0;
634 ✗ taglen -= 3;
635 }
636
637
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 63 while (mime->id != AV_CODEC_ID_NONE) {
638
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 63 if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
639 19 id = mime->id;
640 19 break;
641 }
642 44 mime++;
643 }
644
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 19 if (id == AV_CODEC_ID_NONE) {
645 ✗ av_log(s, AV_LOG_WARNING,
646 "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
647 ✗ goto fail;
648 }
649 19 apic->id = id;
650
651 /* picture type */
652 19 pic_type = avio_r8(pb);
653 19 taglen--;
654
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 19 if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
655 ✗ av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
656 pic_type);
657 ✗ pic_type = 0;
658 }
659 19 apic->type = ff_id3v2_picture_types[pic_type];
660
661 /* description and picture data */
662
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 19 if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
663 ✗ av_log(s, AV_LOG_ERROR,
664 "Error decoding attached picture description.\n");
665 ✗ goto fail;
666 }
667
668 19 apic->buf = av_buffer_alloc(taglen + AV_INPUT_BUFFER_PADDING_SIZE);
669
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 19 if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
670 ✗ goto fail;
671 19 memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
672
673 19 new_extra->tag = "APIC";
674
675 // The description must be unique, and some ID3v2 tag writers add spaces
676 // to write several APIC entries with the same description.
677 19 rstrip_spaces(apic->description);
678 19 list_append(new_extra, extra_meta);
679
680 19 return;
681
682 ✗ fail:
683 ✗ if (apic)
684 ✗ free_apic(apic);
685 ✗ av_freep(&new_extra);
686 ✗ avio_seek(pb, end, SEEK_SET);
687 }
688
689 10 static void free_chapter(void *obj)
690 {
691 10 ID3v2ExtraMetaCHAP *chap = obj;
692 10 av_freep(&chap->element_id);
693 10 av_dict_free(&chap->meta);
694 10 }
695
696 10 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len,
697 const char *ttag, ExtraMetaList *extra_meta, int isv34)
698 {
699 int taglen;
700 char tag[5];
701 10 ID3v2ExtraMeta *new_extra = NULL;
702 10 ID3v2ExtraMetaCHAP *chap = NULL;
703
704 10 new_extra = av_mallocz(sizeof(*new_extra));
705
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 10 if (!new_extra)
706 10 return;
707
708 10 chap = &new_extra->data.chap;
709
710
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 10 if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
711 ✗ goto fail;
712
713
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 10 if (len < 16)
714 ✗ goto fail;
715
716 10 chap->start = avio_rb32(pb);
717 10 chap->end = avio_rb32(pb);
718 10 avio_skip(pb, 8);
719
720 10 len -= 16;
721
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 28 while (len > 10) {
722
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 18 if (avio_read(pb, tag, 4) < 4)
723 ✗ goto fail;
724 18 tag[4] = 0;
725 18 taglen = avio_rb32(pb);
726 18 avio_skip(pb, 2);
727 18 len -= 10;
728
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 18 if (taglen < 0 || taglen > len)
729 ✗ goto fail;
730
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 18 if (tag[0] == 'T')
731 18 read_ttag(s, pb, taglen, &chap->meta, tag);
732 else
733 ✗ avio_skip(pb, taglen);
734 18 len -= taglen;
735 }
736
737 10 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv);
738 10 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv);
739
740 10 new_extra->tag = "CHAP";
741 10 list_append(new_extra, extra_meta);
742
743 10 return;
744
745 ✗ fail:
746 ✗ free_chapter(chap);
747 ✗ av_freep(&new_extra);
748 }
749
750 15 static void free_priv(void *obj)
751 {
752 15 ID3v2ExtraMetaPRIV *priv = obj;
753 15 av_freep(&priv->owner);
754 15 av_freep(&priv->data);
755 15 }
756
757 15 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
758 const char *tag, ExtraMetaList *extra_meta, int isv34)
759 {
760 ID3v2ExtraMeta *meta;
761 ID3v2ExtraMetaPRIV *priv;
762
763 15 meta = av_mallocz(sizeof(*meta));
764
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 15 if (!meta)
765 15 return;
766
767 15 priv = &meta->data.priv;
768
769
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 15 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
770 ✗ goto fail;
771
772 15 priv->data = av_malloc(taglen);
773
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 15 if (!priv->data)
774 ✗ goto fail;
775
776 15 priv->datasize = taglen;
777
778
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 15 if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
779 ✗ goto fail;
780
781 15 meta->tag = "PRIV";
782 15 list_append(meta, extra_meta);
783
784 15 return;
785
786 ✗ fail:
787 ✗ free_priv(priv);
788 ✗ av_freep(&meta);
789 }
790
791 typedef struct ID3v2EMFunc {
792 const char *tag3;
793 const char *tag4;
794 void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
795 const char *tag, ExtraMetaList *extra_meta,
796 int isv34);
797 void (*free)(void *obj);
798 } ID3v2EMFunc;
799
800 static const ID3v2EMFunc id3v2_extra_meta_funcs[] = {
801 { "GEO", "GEOB", read_geobtag, free_geobtag },
802 { "PIC", "APIC", read_apic, free_apic },
803 { "CHAP","CHAP", read_chapter, free_chapter },
804 { "PRIV","PRIV", read_priv, free_priv },
805 { NULL }
806 };
807
808 /**
809 * Get the corresponding ID3v2EMFunc struct for a tag.
810 * @param isv34 Determines if v2.2 or v2.3/4 strings are used
811 * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
812 */
813 94 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
814 {
815 94 int i = 0;
816
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 270 while (id3v2_extra_meta_funcs[i].tag3) {
817
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 268 if (tag && !memcmp(tag,
818 (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
819 id3v2_extra_meta_funcs[i].tag3),
820 (isv34 ? 4 : 3)))
821 92 return &id3v2_extra_meta_funcs[i];
822 176 i++;
823 }
824 2 return NULL;
825 }
826
827 37 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
828 AVFormatContext *s, int len, uint8_t version,
829 uint8_t flags, ExtraMetaList *extra_meta)
830 {
831 int isv34, unsync;
832 unsigned tlen;
833 char tag[5];
834 37 int64_t next, end = avio_tell(pb);
835 int taghdrlen;
836 37 const char *reason = NULL;
837 FFIOContext pb_local;
838 AVIOContext *pbx;
839 37 unsigned char *buffer = NULL;
840 37 int buffer_size = 0;
841 37 const ID3v2EMFunc *extra_func = NULL;
842 37 unsigned char *uncompressed_buffer = NULL;
843 37 av_unused int uncompressed_buffer_size = 0;
844 const char *comm_frame;
845
846
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 37 if (end > INT64_MAX - len - 10)
847 ✗ return;
848 37 end += len;
849
850 37 av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
851
852
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 37 switch (version) {
853 ✗ case 2:
854 ✗ if (flags & 0x40) {
855 ✗ reason = "compression";
856 ✗ goto error;
857 }
858 ✗ isv34 = 0;
859 ✗ taghdrlen = 6;
860 ✗ comm_frame = "COM";
861 ✗ break;
862
863 37 case 3:
864 case 4:
865 37 isv34 = 1;
866 37 taghdrlen = 10;
867 37 comm_frame = "COMM";
868 37 break;
869
870 ✗ default:
871 ✗ reason = "version";
872 ✗ goto error;
873 }
874
875 37 unsync = flags & 0x80;
876
877
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 37 if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
878 ✗ int extlen = get_size(pb, 4);
879 ✗ if (version == 4)
880 /* In v2.4 the length includes the length field we just read. */
881 ✗ extlen -= 4;
882
883 ✗ if (extlen < 0) {
884 ✗ reason = "invalid extended header length";
885 ✗ goto error;
886 }
887 ✗ avio_skip(pb, extlen);
888 ✗ len -= extlen + 4;
889 ✗ if (len < 0) {
890 ✗ reason = "extended header too long.";
891 ✗ goto error;
892 }
893 }
894
895
2/2
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 1960 while (len >= taghdrlen) {
896 1923 unsigned int tflags = 0;
897 1923 int tunsync = 0;
898 1923 int tcomp = 0;
899 1923 int tencr = 0;
900 unsigned long av_unused dlen;
901
902
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 1923 if (isv34) {
903
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 1923 if (avio_read(pb, tag, 4) < 4)
904 ✗ break;
905 1923 tag[4] = 0;
906
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 1923 if (version == 3) {
907 977 tlen = avio_rb32(pb);
908 } else {
909 /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
910 * so check the next tag to see which one to use */
911 946 tlen = avio_rb32(pb);
912
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 946 if (tlen > 0x7f) {
913
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 16 if (tlen < len) {
914 4 int64_t cur = avio_tell(pb);
915
916
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 4 if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
917 ✗ break;
918
919
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✗ Branch 3 not taken.
 4 if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
920 4 tlen = size_to_syncsafe(tlen);
921 ✗ else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
922 ✗ break;
923 4 avio_seek(pb, cur, SEEK_SET);
924 } else
925 12 tlen = size_to_syncsafe(tlen);
926 }
927 }
928 1923 tflags = avio_rb16(pb);
929 1923 tunsync = tflags & ID3v2_FLAG_UNSYNCH;
930 } else {
931 ✗ if (avio_read(pb, tag, 3) < 3)
932 ✗ break;
933 ✗ tag[3] = 0;
934 ✗ tlen = avio_rb24(pb);
935 }
936
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 1923 if (tlen > (1<<28))
937 ✗ break;
938 1923 len -= taghdrlen + tlen;
939
940
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 1923 if (len < 0)
941 ✗ break;
942
943 1923 next = avio_tell(pb) + tlen;
944
945
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 1923 if (!tlen) {
946
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 1720 if (tag[0])
947 3 av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
948 tag);
949 1720 continue;
950 }
951
952
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 203 if (tflags & ID3v2_FLAG_DATALEN) {
953 ✗ if (tlen < 4)
954 ✗ break;
955 ✗ dlen = avio_rb32(pb);
956 ✗ tlen -= 4;
957 } else
958 203 dlen = tlen;
959
960 203 tcomp = tflags & ID3v2_FLAG_COMPRESSION;
961 203 tencr = tflags & ID3v2_FLAG_ENCRYPTION;
962
963 /* skip encrypted tags and, if no zlib, compressed tags */
964
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 203 if (tencr || (!CONFIG_ZLIB && tcomp)) {
965 const char *type;
966 ✗ if (!tcomp)
967 ✗ type = "encrypted";
968 ✗ else if (!tencr)
969 ✗ type = "compressed";
970 else
971 ✗ type = "encrypted and compressed";
972
973 ✗ av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
974 ✗ avio_skip(pb, tlen);
975 /* check for text tag or supported special meta tag */
976
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 203 } else if (tag[0] == 'T' ||
977
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 56 !memcmp(tag, "USLT", 4) ||
978
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 55 !strcmp(tag, comm_frame) ||
979
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 48 (extra_meta &&
980 48 (extra_func = get_extra_meta_func(tag, isv34)))) {
981 201 pbx = pb;
982
983
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 201 if (unsync || tunsync || tcomp) {
984 7 av_fast_malloc(&buffer, &buffer_size, tlen);
985
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 7 if (!buffer) {
986 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
987 ✗ goto seek;
988 }
989 }
990
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 201 if (unsync || tunsync) {
991 7 uint8_t *b = buffer;
992 7 uint8_t *t = buffer;
993 7 uint8_t *end = t + tlen;
994
995
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 7 if (avio_read(pb, buffer, tlen) != tlen) {
996 ✗ av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
997 ✗ goto seek;
998 }
999
1000
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 118 while (t != end) {
1001 111 *b++ = *t++;
1002
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 111 if (t != end && t[-1] == 0xff && !t[0])
1003 ✗ t++;
1004 }
1005
1006 7 ffio_init_read_context(&pb_local, buffer, b - buffer);
1007 7 tlen = b - buffer;
1008 7 pbx = &pb_local.pub; // read from sync buffer
1009 }
1010
1011 #if CONFIG_ZLIB
1012
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 201 if (tcomp) {
1013 int err;
1014
1015 ✗ av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
1016
1017 ✗ if (tlen <= 0)
1018 ✗ goto seek;
1019 ✗ if (dlen / 32768 > tlen)
1020 ✗ goto seek;
1021
1022 ✗ av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
1023 ✗ if (!uncompressed_buffer) {
1024 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
1025 ✗ goto seek;
1026 }
1027
1028 ✗ if (!(unsync || tunsync)) {
1029 ✗ err = avio_read(pb, buffer, tlen);
1030 ✗ if (err < 0) {
1031 ✗ av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1032 ✗ goto seek;
1033 }
1034 ✗ tlen = err;
1035 }
1036
1037 ✗ err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1038 ✗ if (err != Z_OK) {
1039 ✗ av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1040 ✗ goto seek;
1041 }
1042 ✗ ffio_init_read_context(&pb_local, uncompressed_buffer, dlen);
1043 ✗ tlen = dlen;
1044 ✗ pbx = &pb_local.pub; // read from sync buffer
1045 }
1046 #endif
1047
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 201 if (tag[0] == 'T')
1048 /* parse text tag */
1049 147 read_ttag(s, pbx, tlen, metadata, tag);
1050
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 54 else if (!memcmp(tag, "USLT", 4))
1051 1 read_uslt(s, pbx, tlen, metadata);
1052
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 53 else if (!strcmp(tag, comm_frame))
1053 7 read_comment(s, pbx, tlen, metadata);
1054 else
1055 /* parse special meta tag */
1056 46 extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1057
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 2 } else if (!tag[0]) {
1058 ✗ if (tag[1])
1059 ✗ av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1060 ✗ avio_skip(pb, tlen);
1061 ✗ break;
1062 }
1063 /* Skip to end of tag */
1064 2 seek:
1065 203 avio_seek(pb, next, SEEK_SET);
1066 }
1067
1068 /* Footer preset, always 10 bytes, skip over it */
1069
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 37 if (version == 4 && flags & 0x10)
1070 ✗ end += 10;
1071
1072 37 error:
1073
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 37 if (reason)
1074 ✗ av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1075 version, reason);
1076 37 avio_seek(pb, end, SEEK_SET);
1077 37 av_free(buffer);
1078 37 av_free(uncompressed_buffer);
1079 37 return;
1080 }
1081
1082 4537 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1083 AVFormatContext *s, const char *magic,
1084 ID3v2ExtraMeta **extra_metap, int64_t max_search_size)
1085 {
1086 int len, ret;
1087 uint8_t buf[ID3v2_HEADER_SIZE];
1088 4537 ExtraMetaList extra_meta = { NULL };
1089 int found_header;
1090 int64_t start, off;
1091
1092
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 4537 if (extra_metap)
1093 4537 *extra_metap = NULL;
1094
1095
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 4537 if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1096 ✗ return;
1097
1098 4537 start = avio_tell(pb);
1099 do {
1100 /* save the current offset in case there's nothing to read/skip */
1101 4574 off = avio_tell(pb);
1102
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 4574 if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1103 7 avio_seek(pb, off, SEEK_SET);
1104 7 break;
1105 }
1106
1107 4567 ret = ffio_ensure_seekback(pb, ID3v2_HEADER_SIZE);
1108
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 4567 if (ret >= 0)
1109 4567 ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1110
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 4567 if (ret != ID3v2_HEADER_SIZE) {
1111 3 avio_seek(pb, off, SEEK_SET);
1112 3 break;
1113 }
1114 4564 found_header = ff_id3v2_match(buf, magic);
1115
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 4564 if (found_header) {
1116 /* parse ID3v2 header */
1117 37 len = ((buf[6] & 0x7f) << 21) |
1118 37 ((buf[7] & 0x7f) << 14) |
1119 37 ((buf[8] & 0x7f) << 7) |
1120 37 (buf[9] & 0x7f);
1121
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 37 id3v2_parse(pb, metadata, s, len, buf[3], buf[5],
1122 extra_metap ? &extra_meta : NULL);
1123 } else {
1124 4527 avio_seek(pb, off, SEEK_SET);
1125 }
1126
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 4564 } while (found_header);
1127 4537 ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1128 4537 ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1129 4537 ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1130 4537 merge_date(metadata);
1131
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 4537 if (extra_metap)
1132 4537 *extra_metap = extra_meta.head;
1133 }
1134
1135 4523 void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata,
1136 const char *magic, ID3v2ExtraMeta **extra_meta)
1137 {
1138 4523 id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1139 4523 }
1140
1141 14 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1142 ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1143 {
1144 14 id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1145 14 }
1146
1147 39 void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
1148 {
1149 39 ID3v2ExtraMeta *current = *extra_meta, *next;
1150 const ID3v2EMFunc *extra_func;
1151
1152
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 85 while (current) {
1153
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 46 if ((extra_func = get_extra_meta_func(current->tag, 1)))
1154 46 extra_func->free(&current->data);
1155 46 next = current->next;
1156 46 av_freep(&current);
1157 46 current = next;
1158 }
1159
1160 39 *extra_meta = NULL;
1161 39 }
1162
1163 17 int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
1164 {
1165 ID3v2ExtraMeta *cur;
1166
1167
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 56 for (cur = extra_meta; cur; cur = cur->next) {
1168 ID3v2ExtraMetaAPIC *apic;
1169 AVStream *st;
1170 int ret;
1171
1172
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 39 if (strcmp(cur->tag, "APIC"))
1173 20 continue;
1174 19 apic = &cur->data.apic;
1175
1176 19 ret = ff_add_attached_pic(s, NULL, NULL, &apic->buf, 0);
1177
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 19 if (ret < 0)
1178 ✗ return ret;
1179 19 st = s->streams[s->nb_streams - 1];
1180 19 st->codecpar->codec_id = apic->id;
1181
1182
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 19 if (AV_RB64(st->attached_pic.data) == PNGSIG)
1183 4 st->codecpar->codec_id = AV_CODEC_ID_PNG;
1184
1185
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 19 if (apic->description[0])
1186 10 av_dict_set(&st->metadata, "title", apic->description, 0);
1187
1188 19 av_dict_set(&st->metadata, "comment", apic->type, 0);
1189 }
1190
1191 17 return 0;
1192 }
1193
1194 24 int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
1195 {
1196 24 AVRational time_base = {1, 1000};
1197 int ret;
1198
1199
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 67 for (unsigned i = 0; cur; cur = cur->next) {
1200 ID3v2ExtraMetaCHAP *chap;
1201 AVChapter *chapter;
1202
1203
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 43 if (strcmp(cur->tag, "CHAP"))
1204 33 continue;
1205
1206 10 chap = &cur->data.chap;
1207 10 chapter = avpriv_new_chapter(s, i++, time_base, chap->start,
1208 10 chap->end, chap->element_id);
1209
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 10 if (!chapter)
1210 ✗ continue;
1211
1212
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 10 if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1213 ✗ return ret;
1214 }
1215
1216 24 return 0;
1217 }
1218
1219 13 int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
1220 {
1221 ID3v2ExtraMeta *cur;
1222 13 int dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL;
1223
1224
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 34 for (cur = extra_meta; cur; cur = cur->next) {
1225
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 21 if (!strcmp(cur->tag, "PRIV")) {
1226 13 ID3v2ExtraMetaPRIV *priv = &cur->data.priv;
1227 AVBPrint bprint;
1228 char *escaped, *key;
1229 int i, ret;
1230
1231
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 13 if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1232 ✗ return AVERROR(ENOMEM);
1233 }
1234
1235 13 av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1236
1237
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 108 for (i = 0; i < priv->datasize; i++) {
1238
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 95 if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1239 44 av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1240 } else {
1241 51 av_bprint_chars(&bprint, priv->data[i], 1);
1242 }
1243 }
1244
1245
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 13 if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1246 ✗ av_free(key);
1247 ✗ return ret;
1248 }
1249
1250
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 13 if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1251 ✗ return ret;
1252 }
1253 }
1254 }
1255
1256 13 return 0;
1257 }
1258
1259 10 int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
1260 {
1261 10 return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);
1262 }
1263