FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/id3v2.c
Date: 2025-10-17 15:29:15
Exec Total Coverage
Lines: 472 663 71.2%
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 21958 int ff_id3v2_match(const uint8_t *buf, const char *magic)
147 {
148 22106 return buf[0] == magic[0] &&
149
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 22224 (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 8 uint16_t bom = avio_rb16(pb);
277
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 8 switch (bom) {
278 8 case 0xfffe:
279 8 get = avio_rl16;
280 8 case 0xfeff:
281 8 break;
282 ✗ default:
283 ✗ av_log(s, AV_LOG_ERROR, "Incorrect BOM value: 0x%x\n", bom);
284 ✗ ffio_free_dyn_buf(&dynbuf);
285 ✗ *dst = NULL;
286 ✗ *maxread = left;
287 ✗ return AVERROR_INVALIDDATA;
288 }
289 // fall-through
290
291 case ID3v2_ENCODING_UTF16BE:
292
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 223 while ((left > 1) && ch) {
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 197 GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
294
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 261 PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
295 }
296
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 26 if (left < 0)
297 ✗ left += 2; /* did not read last char from pb */
298 26 break;
299
300 143 case ID3v2_ENCODING_UTF8:
301
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 1658 while (left && ch) {
302 1515 ch = avio_r8(pb);
303 1515 avio_w8(dynbuf, ch);
304 1515 left--;
305 }
306 143 break;
307 ✗ default:
308 ✗ av_log(s, AV_LOG_WARNING, "Unknown encoding %d\n", encoding);
309 }
310
311
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 258 if (ch)
312 22 avio_w8(dynbuf, 0);
313
314 258 dynsize = avio_close_dyn_buf(dynbuf, dst);
315
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 258 if (dynsize <= 0) {
316 ✗ av_freep(dst);
317 ✗ return AVERROR(ENOMEM);
318 }
319 258 *maxread = left;
320
321 258 return 0;
322 }
323
324 /**
325 * Parse a text tag.
326 */
327 165 static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
328 AVDictionary **metadata, const char *key)
329 {
330 uint8_t *dst;
331 165 int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
332 unsigned genre;
333
334
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 165 if (taglen < 1)
335 ✗ return;
336
337 165 encoding = avio_r8(pb);
338 165 taglen--; /* account for encoding type byte */
339
340
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 165 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
341 ✗ av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
342 ✗ return;
343 }
344
345
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 165 if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
346
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 13 (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
347 ✗ genre <= ID3v1_GENRE_MAX) {
348 ✗ av_freep(&dst);
349 ✗ dst = av_strdup(ff_id3v1_genre_str[genre]);
350
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 165 } else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
351 /* dst now contains the key, need to get value */
352 27 key = dst;
353
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 27 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
354 ✗ av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
355 ✗ av_freep(&key);
356 ✗ return;
357 }
358 27 dict_flags |= AV_DICT_DONT_STRDUP_KEY;
359
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 138 } else if (!*dst)
360 4 av_freep(&dst);
361
362
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 165 if (dst)
363 161 av_dict_set(metadata, key, dst, dict_flags);
364 }
365
366 1 static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
367 AVDictionary **metadata)
368 {
369 uint8_t lang[4];
370 1 uint8_t *descriptor = NULL; // 'Content descriptor'
371 uint8_t *text;
372 char *key;
373 int encoding;
374 1 int ok = 0;
375
376
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 1 if (taglen < 4)
377 ✗ goto error;
378
379 1 encoding = avio_r8(pb);
380 1 taglen--;
381
382
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 1 if (avio_read(pb, lang, 3) < 3)
383 ✗ goto error;
384 1 lang[3] = '\0';
385 1 taglen -= 3;
386
387
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 1 if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0 || taglen < 0)
388 ✗ goto error;
389
390
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 1 if (decode_str(s, pb, encoding, &text, &taglen) < 0 || taglen < 0)
391 ✗ goto error;
392
393 // FFmpeg does not support hierarchical metadata, so concatenate the keys.
394
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 1 key = av_asprintf("lyrics-%s%s%s", descriptor[0] ? (char *)descriptor : "",
395
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 1 descriptor[0] ? "-" : "",
396 lang);
397
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 1 if (!key) {
398 ✗ av_free(text);
399 ✗ goto error;
400 }
401
402 1 av_dict_set(metadata, key, text,
403 AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL);
404
405 1 ok = 1;
406 1 error:
407
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 1 if (!ok)
408 ✗ av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
409 1 av_free(descriptor);
410 1 }
411
412 /**
413 * Parse a comment tag.
414 */
415 7 static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
416 AVDictionary **metadata)
417 {
418 7 const char *key = "comment";
419 uint8_t *dst;
420 7 int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
421 av_unused int language;
422
423
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 7 if (taglen < 4)
424 ✗ return;
425
426 7 encoding = avio_r8(pb);
427 7 language = avio_rl24(pb);
428 7 taglen -= 4;
429
430
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 7 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
431 ✗ av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
432 ✗ return;
433 }
434
435
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 7 if (dst && !*dst)
436 2 av_freep(&dst);
437
438
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 7 if (dst) {
439 5 key = (const char *) dst;
440 5 dict_flags |= AV_DICT_DONT_STRDUP_KEY;
441 }
442
443
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 7 if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
444 ✗ av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
445 ✗ if (dict_flags & AV_DICT_DONT_STRDUP_KEY)
446 ✗ av_freep((void*)&key);
447 ✗ return;
448 }
449
450
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 7 if (dst)
451 7 av_dict_set(metadata, key, (const char *) dst, dict_flags);
452 }
453
454 typedef struct ExtraMetaList {
455 ID3v2ExtraMeta *head, *tail;
456 } ExtraMetaList;
457
458 46 static void list_append(ID3v2ExtraMeta *new_elem, ExtraMetaList *list)
459 {
460
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 46 if (list->tail)
461 23 list->tail->next = new_elem;
462 else
463 23 list->head = new_elem;
464 46 list->tail = new_elem;
465 46 }
466
467 /**
468 * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
469 */
470 2 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
471 const char *tag, ExtraMetaList *extra_meta, int isv34)
472 {
473 2 ID3v2ExtraMetaGEOB *geob_data = NULL;
474 2 ID3v2ExtraMeta *new_extra = NULL;
475 char encoding;
476 unsigned int len;
477
478
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 2 if (taglen < 1)
479 ✗ return;
480
481 2 new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
482
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 2 if (!new_extra) {
483 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
484 sizeof(ID3v2ExtraMeta));
485 ✗ return;
486 }
487
488 2 geob_data = &new_extra->data.geob;
489
490 /* read encoding type byte */
491 2 encoding = avio_r8(pb);
492 2 taglen--;
493
494 /* read MIME type (always ISO-8859) */
495
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 2 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
496 2 &taglen) < 0 ||
497
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 2 taglen <= 0)
498 ✗ goto fail;
499
500 /* read file name */
501
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 2 if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
502
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 2 taglen <= 0)
503 ✗ goto fail;
504
505 /* read content description */
506
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 2 if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
507
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 2 taglen < 0)
508 ✗ goto fail;
509
510
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 2 if (taglen) {
511 /* save encapsulated binary data */
512 2 geob_data->data = av_malloc(taglen);
513
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 2 if (!geob_data->data) {
514 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
515 ✗ goto fail;
516 }
517
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 2 if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
518 ✗ av_log(s, AV_LOG_WARNING,
519 "Error reading GEOB frame, data truncated.\n");
520 2 geob_data->datasize = len;
521 } else {
522 ✗ geob_data->data = NULL;
523 ✗ geob_data->datasize = 0;
524 }
525
526 /* add data to the list */
527 2 new_extra->tag = "GEOB";
528 2 list_append(new_extra, extra_meta);
529
530 2 return;
531
532 ✗ fail:
533 ✗ av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
534 ✗ free_geobtag(geob_data);
535 ✗ av_free(new_extra);
536 ✗ return;
537 }
538
539 7 static int is_number(const char *str)
540 {
541
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 35 while (*str >= '0' && *str <= '9')
542 28 str++;
543 7 return !*str;
544 }
545
546 243 static AVDictionaryEntry *get_date_tag(AVDictionary *m, const char *tag)
547 {
548 AVDictionaryEntry *t;
549
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 243 if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
550
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 7 strlen(t->value) == 4 && is_number(t->value))
551 7 return t;
552 236 return NULL;
553 }
554
555 118 static void merge_date(AVDictionary **m)
556 {
557 AVDictionaryEntry *t;
558 118 char date[17] = { 0 }; // YYYY-MM-DD hh:mm
559
560
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 231 if (!(t = get_date_tag(*m, "TYER")) &&
561 113 !(t = get_date_tag(*m, "TYE")))
562 113 return;
563 5 av_strlcpy(date, t->value, 5);
564 5 av_dict_set(m, "TYER", NULL, 0);
565 5 av_dict_set(m, "TYE", NULL, 0);
566
567
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 8 if (!(t = get_date_tag(*m, "TDAT")) &&
568 3 !(t = get_date_tag(*m, "TDA")))
569 3 goto finish;
570 2 snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
571 2 av_dict_set(m, "TDAT", NULL, 0);
572 2 av_dict_set(m, "TDA", NULL, 0);
573
574
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 4 if (!(t = get_date_tag(*m, "TIME")) &&
575 2 !(t = get_date_tag(*m, "TIM")))
576 2 goto finish;
577 ✗ snprintf(date + 10, sizeof(date) - 10,
578 ✗ " %.2s:%.2s", t->value, t->value + 2);
579 ✗ av_dict_set(m, "TIME", NULL, 0);
580 ✗ av_dict_set(m, "TIM", NULL, 0);
581
582 5 finish:
583
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 5 if (date[0])
584 5 av_dict_set(m, "date", date, 0);
585 }
586
587 19 static void free_apic(void *obj)
588 {
589 19 ID3v2ExtraMetaAPIC *apic = obj;
590 19 av_buffer_unref(&apic->buf);
591 19 av_freep(&apic->description);
592 19 }
593
594 19 static void rstrip_spaces(char *buf)
595 {
596 19 size_t len = strlen(buf);
597
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 19 while (len > 0 && buf[len - 1] == ' ')
598 ✗ buf[--len] = 0;
599 19 }
600
601 19 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
602 const char *tag, ExtraMetaList *extra_meta, int isv34)
603 {
604 int enc, pic_type;
605 19 char mimetype[64] = {0};
606 19 const CodecMime *mime = ff_id3v2_mime_tags;
607 19 enum AVCodecID id = AV_CODEC_ID_NONE;
608 19 ID3v2ExtraMetaAPIC *apic = NULL;
609 19 ID3v2ExtraMeta *new_extra = NULL;
610 19 int64_t end = avio_tell(pb) + taglen;
611
612
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 19 if (taglen <= 4 || (!isv34 && taglen <= 6))
613 ✗ goto fail;
614
615 19 new_extra = av_mallocz(sizeof(*new_extra));
616
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 19 if (!new_extra)
617 ✗ goto fail;
618
619 19 apic = &new_extra->data.apic;
620
621 19 enc = avio_r8(pb);
622 19 taglen--;
623
624 /* mimetype */
625
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 19 if (isv34) {
626 19 int ret = avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
627
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 19 if (ret < 0 || ret >= taglen)
628 ✗ goto fail;
629 19 taglen -= ret;
630 } else {
631 ✗ if (avio_read(pb, mimetype, 3) < 0)
632 ✗ goto fail;
633
634 ✗ mimetype[3] = 0;
635 ✗ taglen -= 3;
636 }
637
638
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 63 while (mime->id != AV_CODEC_ID_NONE) {
639
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 63 if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
640 19 id = mime->id;
641 19 break;
642 }
643 44 mime++;
644 }
645
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 19 if (id == AV_CODEC_ID_NONE) {
646 ✗ av_log(s, AV_LOG_WARNING,
647 "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
648 ✗ goto fail;
649 }
650 19 apic->id = id;
651
652 /* picture type */
653 19 pic_type = avio_r8(pb);
654 19 taglen--;
655
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 19 if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
656 ✗ av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
657 pic_type);
658 ✗ pic_type = 0;
659 }
660 19 apic->type = ff_id3v2_picture_types[pic_type];
661
662 /* description and picture data */
663
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 19 if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
664 ✗ av_log(s, AV_LOG_ERROR,
665 "Error decoding attached picture description.\n");
666 ✗ goto fail;
667 }
668
669 19 apic->buf = av_buffer_alloc(taglen + AV_INPUT_BUFFER_PADDING_SIZE);
670
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 19 if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
671 ✗ goto fail;
672 19 memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
673
674 19 new_extra->tag = "APIC";
675
676 // The description must be unique, and some ID3v2 tag writers add spaces
677 // to write several APIC entries with the same description.
678 19 rstrip_spaces(apic->description);
679 19 list_append(new_extra, extra_meta);
680
681 19 return;
682
683 ✗ fail:
684 ✗ if (apic)
685 ✗ free_apic(apic);
686 ✗ av_freep(&new_extra);
687 ✗ avio_seek(pb, end, SEEK_SET);
688 }
689
690 10 static void free_chapter(void *obj)
691 {
692 10 ID3v2ExtraMetaCHAP *chap = obj;
693 10 av_freep(&chap->element_id);
694 10 av_dict_free(&chap->meta);
695 10 }
696
697 10 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len,
698 const char *ttag, ExtraMetaList *extra_meta, int isv34)
699 {
700 int taglen;
701 char tag[5];
702 10 ID3v2ExtraMeta *new_extra = NULL;
703 10 ID3v2ExtraMetaCHAP *chap = NULL;
704
705 10 new_extra = av_mallocz(sizeof(*new_extra));
706
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 10 if (!new_extra)
707 10 return;
708
709 10 chap = &new_extra->data.chap;
710
711
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 10 if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
712 ✗ goto fail;
713
714
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 10 if (len < 16)
715 ✗ goto fail;
716
717 10 chap->start = avio_rb32(pb);
718 10 chap->end = avio_rb32(pb);
719 10 avio_skip(pb, 8);
720
721 10 len -= 16;
722
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 28 while (len > 10) {
723
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 18 if (avio_read(pb, tag, 4) < 4)
724 ✗ goto fail;
725 18 tag[4] = 0;
726 18 taglen = avio_rb32(pb);
727 18 avio_skip(pb, 2);
728 18 len -= 10;
729
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 18 if (taglen < 0 || taglen > len)
730 ✗ goto fail;
731
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 18 if (tag[0] == 'T')
732 18 read_ttag(s, pb, taglen, &chap->meta, tag);
733 else
734 ✗ avio_skip(pb, taglen);
735 18 len -= taglen;
736 }
737
738 10 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv);
739 10 ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv);
740
741 10 new_extra->tag = "CHAP";
742 10 list_append(new_extra, extra_meta);
743
744 10 return;
745
746 ✗ fail:
747 ✗ free_chapter(chap);
748 ✗ av_freep(&new_extra);
749 }
750
751 15 static void free_priv(void *obj)
752 {
753 15 ID3v2ExtraMetaPRIV *priv = obj;
754 15 av_freep(&priv->owner);
755 15 av_freep(&priv->data);
756 15 }
757
758 15 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
759 const char *tag, ExtraMetaList *extra_meta, int isv34)
760 {
761 ID3v2ExtraMeta *meta;
762 ID3v2ExtraMetaPRIV *priv;
763
764 15 meta = av_mallocz(sizeof(*meta));
765
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 15 if (!meta)
766 15 return;
767
768 15 priv = &meta->data.priv;
769
770
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 15 if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
771 ✗ goto fail;
772
773 15 priv->data = av_malloc(taglen);
774
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 15 if (!priv->data)
775 ✗ goto fail;
776
777 15 priv->datasize = taglen;
778
779
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 15 if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
780 ✗ goto fail;
781
782 15 meta->tag = "PRIV";
783 15 list_append(meta, extra_meta);
784
785 15 return;
786
787 ✗ fail:
788 ✗ free_priv(priv);
789 ✗ av_freep(&meta);
790 }
791
792 typedef struct ID3v2EMFunc {
793 const char *tag3;
794 const char *tag4;
795 void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
796 const char *tag, ExtraMetaList *extra_meta,
797 int isv34);
798 void (*free)(void *obj);
799 } ID3v2EMFunc;
800
801 static const ID3v2EMFunc id3v2_extra_meta_funcs[] = {
802 { "GEO", "GEOB", read_geobtag, free_geobtag },
803 { "PIC", "APIC", read_apic, free_apic },
804 { "CHAP","CHAP", read_chapter, free_chapter },
805 { "PRIV","PRIV", read_priv, free_priv },
806 { NULL }
807 };
808
809 /**
810 * Get the corresponding ID3v2EMFunc struct for a tag.
811 * @param isv34 Determines if v2.2 or v2.3/4 strings are used
812 * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
813 */
814 94 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
815 {
816 94 int i = 0;
817
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 270 while (id3v2_extra_meta_funcs[i].tag3) {
818
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 268 if (tag && !memcmp(tag,
819 (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
820 id3v2_extra_meta_funcs[i].tag3),
821 (isv34 ? 4 : 3)))
822 92 return &id3v2_extra_meta_funcs[i];
823 176 i++;
824 }
825 2 return NULL;
826 }
827
828 37 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
829 AVFormatContext *s, int len, uint8_t version,
830 uint8_t flags, ExtraMetaList *extra_meta)
831 {
832 int isv34, unsync;
833 unsigned tlen;
834 char tag[5];
835 37 int64_t next, end = avio_tell(pb);
836 int taghdrlen;
837 37 const char *reason = NULL;
838 FFIOContext pb_local;
839 AVIOContext *pbx;
840 37 unsigned char *buffer = NULL;
841 37 int buffer_size = 0;
842 37 const ID3v2EMFunc *extra_func = NULL;
843 37 unsigned char *uncompressed_buffer = NULL;
844 37 av_unused int uncompressed_buffer_size = 0;
845 const char *comm_frame;
846
847
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 37 if (end > INT64_MAX - len - 10)
848 ✗ return;
849 37 end += len;
850
851 37 av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
852
853
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 37 switch (version) {
854 ✗ case 2:
855 ✗ if (flags & 0x40) {
856 ✗ reason = "compression";
857 ✗ goto error;
858 }
859 ✗ isv34 = 0;
860 ✗ taghdrlen = 6;
861 ✗ comm_frame = "COM";
862 ✗ break;
863
864 37 case 3:
865 case 4:
866 37 isv34 = 1;
867 37 taghdrlen = 10;
868 37 comm_frame = "COMM";
869 37 break;
870
871 ✗ default:
872 ✗ reason = "version";
873 ✗ goto error;
874 }
875
876 37 unsync = flags & 0x80;
877
878
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 37 if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
879 ✗ int extlen = get_size(pb, 4);
880 ✗ if (version == 4)
881 /* In v2.4 the length includes the length field we just read. */
882 ✗ extlen -= 4;
883
884 ✗ if (extlen < 0) {
885 ✗ reason = "invalid extended header length";
886 ✗ goto error;
887 }
888 ✗ avio_skip(pb, extlen);
889 ✗ len -= extlen + 4;
890 ✗ if (len < 0) {
891 ✗ reason = "extended header too long.";
892 ✗ goto error;
893 }
894 }
895
896
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 1960 while (len >= taghdrlen) {
897 1923 unsigned int tflags = 0;
898 1923 int tunsync = 0;
899 1923 int tcomp = 0;
900 1923 int tencr = 0;
901 av_unused unsigned long dlen;
902
903
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 1923 if (isv34) {
904
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 1923 if (avio_read(pb, tag, 4) < 4)
905 ✗ break;
906 1923 tag[4] = 0;
907
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 1923 if (version == 3) {
908 977 tlen = avio_rb32(pb);
909 } else {
910 /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
911 * so check the next tag to see which one to use */
912 946 tlen = avio_rb32(pb);
913
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 946 if (tlen > 0x7f) {
914
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 16 if (tlen < len) {
915 4 int64_t cur = avio_tell(pb);
916
917
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 4 if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
918 ✗ break;
919
920
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 4 if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
921 4 tlen = size_to_syncsafe(tlen);
922 ✗ else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
923 ✗ break;
924 4 avio_seek(pb, cur, SEEK_SET);
925 } else
926 12 tlen = size_to_syncsafe(tlen);
927 }
928 }
929 1923 tflags = avio_rb16(pb);
930 1923 tunsync = tflags & ID3v2_FLAG_UNSYNCH;
931 } else {
932 ✗ if (avio_read(pb, tag, 3) < 3)
933 ✗ break;
934 ✗ tag[3] = 0;
935 ✗ tlen = avio_rb24(pb);
936 }
937
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 1923 if (tlen > (1<<28))
938 ✗ break;
939 1923 len -= taghdrlen + tlen;
940
941
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 1923 if (len < 0)
942 ✗ break;
943
944 1923 next = avio_tell(pb) + tlen;
945
946
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 1923 if (!tlen) {
947
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 1720 if (tag[0])
948 3 av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
949 tag);
950 1720 continue;
951 }
952
953
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 203 if (tflags & ID3v2_FLAG_DATALEN) {
954 ✗ if (tlen < 4)
955 ✗ break;
956 ✗ dlen = avio_rb32(pb);
957 ✗ tlen -= 4;
958 } else
959 203 dlen = tlen;
960
961 203 tcomp = tflags & ID3v2_FLAG_COMPRESSION;
962 203 tencr = tflags & ID3v2_FLAG_ENCRYPTION;
963
964 /* skip encrypted tags and, if no zlib, compressed tags */
965
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 203 if (tencr || (!CONFIG_ZLIB && tcomp)) {
966 const char *type;
967 ✗ if (!tcomp)
968 ✗ type = "encrypted";
969 ✗ else if (!tencr)
970 ✗ type = "compressed";
971 else
972 ✗ type = "encrypted and compressed";
973
974 ✗ av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
975 ✗ avio_skip(pb, tlen);
976 /* check for text tag or supported special meta tag */
977
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 203 } else if (tag[0] == 'T' ||
978
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 56 !memcmp(tag, "USLT", 4) ||
979
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 55 !strcmp(tag, comm_frame) ||
980
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 48 (extra_meta &&
981 48 (extra_func = get_extra_meta_func(tag, isv34)))) {
982 201 pbx = pb;
983
984
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 201 if (unsync || tunsync || tcomp) {
985 7 av_fast_malloc(&buffer, &buffer_size, tlen);
986
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 7 if (!buffer) {
987 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
988 ✗ goto seek;
989 }
990 }
991
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 201 if (unsync || tunsync) {
992 7 uint8_t *b = buffer;
993 7 uint8_t *t = buffer;
994 7 uint8_t *end = t + tlen;
995
996
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 7 if (avio_read(pb, buffer, tlen) != tlen) {
997 ✗ av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
998 ✗ goto seek;
999 }
1000
1001
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 118 while (t != end) {
1002 111 *b++ = *t++;
1003
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 111 if (t != end && t[-1] == 0xff && !t[0])
1004 ✗ t++;
1005 }
1006
1007 7 ffio_init_read_context(&pb_local, buffer, b - buffer);
1008 7 tlen = b - buffer;
1009 7 pbx = &pb_local.pub; // read from sync buffer
1010 }
1011
1012 #if CONFIG_ZLIB
1013
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 201 if (tcomp) {
1014 int err;
1015
1016 ✗ av_log(s, AV_LOG_DEBUG, "Compressed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
1017
1018 ✗ if (tlen <= 0)
1019 ✗ goto seek;
1020 ✗ if (dlen / 32768 > tlen)
1021 ✗ goto seek;
1022
1023 ✗ av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
1024 ✗ if (!uncompressed_buffer) {
1025 ✗ av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
1026 ✗ goto seek;
1027 }
1028
1029 ✗ if (!(unsync || tunsync)) {
1030 ✗ err = avio_read(pb, buffer, tlen);
1031 ✗ if (err < 0) {
1032 ✗ av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1033 ✗ goto seek;
1034 }
1035 ✗ tlen = err;
1036 }
1037
1038 ✗ err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1039 ✗ if (err != Z_OK) {
1040 ✗ av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1041 ✗ goto seek;
1042 }
1043 ✗ ffio_init_read_context(&pb_local, uncompressed_buffer, dlen);
1044 ✗ tlen = dlen;
1045 ✗ pbx = &pb_local.pub; // read from sync buffer
1046 }
1047 #endif
1048
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 201 if (tag[0] == 'T')
1049 /* parse text tag */
1050 147 read_ttag(s, pbx, tlen, metadata, tag);
1051
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 54 else if (!memcmp(tag, "USLT", 4))
1052 1 read_uslt(s, pbx, tlen, metadata);
1053
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 53 else if (!strcmp(tag, comm_frame))
1054 7 read_comment(s, pbx, tlen, metadata);
1055 else
1056 /* parse special meta tag */
1057 46 extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1058
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 2 } else if (!tag[0]) {
1059 ✗ if (tag[1])
1060 ✗ av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1061 ✗ avio_skip(pb, tlen);
1062 ✗ break;
1063 }
1064 /* Skip to end of tag */
1065 2 seek:
1066 203 avio_seek(pb, next, SEEK_SET);
1067 }
1068
1069 /* Footer preset, always 10 bytes, skip over it */
1070
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 37 if (version == 4 && flags & 0x10)
1071 ✗ end += 10;
1072
1073 37 error:
1074
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 37 if (reason)
1075 ✗ av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1076 version, reason);
1077 37 avio_seek(pb, end, SEEK_SET);
1078 37 av_free(buffer);
1079 37 av_free(uncompressed_buffer);
1080 37 return;
1081 }
1082
1083 118 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1084 AVFormatContext *s, const char *magic,
1085 ID3v2ExtraMeta **extra_metap, int64_t max_search_size)
1086 {
1087 int len, ret;
1088 uint8_t buf[ID3v2_HEADER_SIZE];
1089 118 ExtraMetaList extra_meta = { NULL };
1090 int found_header;
1091 int64_t start, off;
1092
1093
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 118 if (extra_metap)
1094 118 *extra_metap = NULL;
1095
1096
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 118 if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1097 ✗ return;
1098
1099 118 start = avio_tell(pb);
1100 do {
1101 /* save the current offset in case there's nothing to read/skip */
1102 155 off = avio_tell(pb);
1103
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 155 if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1104 7 avio_seek(pb, off, SEEK_SET);
1105 7 break;
1106 }
1107
1108 148 ret = ffio_ensure_seekback(pb, ID3v2_HEADER_SIZE);
1109
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 148 if (ret >= 0)
1110 148 ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1111
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 148 if (ret != ID3v2_HEADER_SIZE) {
1112 3 avio_seek(pb, off, SEEK_SET);
1113 3 break;
1114 }
1115 145 found_header = ff_id3v2_match(buf, magic);
1116
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 145 if (found_header) {
1117 /* parse ID3v2 header */
1118 37 len = ((buf[6] & 0x7f) << 21) |
1119 37 ((buf[7] & 0x7f) << 14) |
1120 37 ((buf[8] & 0x7f) << 7) |
1121 37 (buf[9] & 0x7f);
1122
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 37 id3v2_parse(pb, metadata, s, len, buf[3], buf[5],
1123 extra_metap ? &extra_meta : NULL);
1124 } else {
1125 108 avio_seek(pb, off, SEEK_SET);
1126 }
1127
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 145 } while (found_header);
1128 118 ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1129 118 ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1130 118 ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1131 118 merge_date(metadata);
1132
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 118 if (extra_metap)
1133 118 *extra_metap = extra_meta.head;
1134 }
1135
1136 104 void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata,
1137 const char *magic, ID3v2ExtraMeta **extra_meta)
1138 {
1139 104 id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1140 104 }
1141
1142 14 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1143 ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1144 {
1145 14 id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1146 14 }
1147
1148 40 void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
1149 {
1150 40 ID3v2ExtraMeta *current = *extra_meta, *next;
1151 const ID3v2EMFunc *extra_func;
1152
1153
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 86 while (current) {
1154
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 46 if ((extra_func = get_extra_meta_func(current->tag, 1)))
1155 46 extra_func->free(&current->data);
1156 46 next = current->next;
1157 46 av_freep(&current);
1158 46 current = next;
1159 }
1160
1161 40 *extra_meta = NULL;
1162 40 }
1163
1164 17 int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
1165 {
1166 ID3v2ExtraMeta *cur;
1167
1168
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 56 for (cur = extra_meta; cur; cur = cur->next) {
1169 ID3v2ExtraMetaAPIC *apic;
1170 AVStream *st;
1171 int ret;
1172
1173
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 39 if (strcmp(cur->tag, "APIC"))
1174 20 continue;
1175 19 apic = &cur->data.apic;
1176
1177 19 ret = ff_add_attached_pic(s, NULL, NULL, &apic->buf, 0);
1178
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 19 if (ret < 0)
1179 ✗ return ret;
1180 19 st = s->streams[s->nb_streams - 1];
1181 19 st->codecpar->codec_id = apic->id;
1182
1183
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 19 if (AV_RB64(st->attached_pic.data) == PNGSIG)
1184 4 st->codecpar->codec_id = AV_CODEC_ID_PNG;
1185
1186
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 19 if (apic->description[0])
1187 10 av_dict_set(&st->metadata, "title", apic->description, 0);
1188
1189 19 av_dict_set(&st->metadata, "comment", apic->type, 0);
1190 }
1191
1192 17 return 0;
1193 }
1194
1195 24 int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *cur)
1196 {
1197 24 AVRational time_base = {1, 1000};
1198 int ret;
1199
1200
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 67 for (unsigned i = 0; cur; cur = cur->next) {
1201 ID3v2ExtraMetaCHAP *chap;
1202 AVChapter *chapter;
1203
1204
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 43 if (strcmp(cur->tag, "CHAP"))
1205 33 continue;
1206
1207 10 chap = &cur->data.chap;
1208 10 chapter = avpriv_new_chapter(s, i++, time_base, chap->start,
1209 10 chap->end, chap->element_id);
1210
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 10 if (!chapter)
1211 ✗ continue;
1212
1213
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 10 if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1214 ✗ return ret;
1215 }
1216
1217 24 return 0;
1218 }
1219
1220 13 int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
1221 {
1222 ID3v2ExtraMeta *cur;
1223 13 int dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_KEY | AV_DICT_DONT_STRDUP_VAL;
1224
1225
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 34 for (cur = extra_meta; cur; cur = cur->next) {
1226
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 21 if (!strcmp(cur->tag, "PRIV")) {
1227 13 ID3v2ExtraMetaPRIV *priv = &cur->data.priv;
1228 AVBPrint bprint;
1229 char *escaped, *key;
1230 int i, ret;
1231
1232
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 13 if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1233 ✗ return AVERROR(ENOMEM);
1234 }
1235
1236 13 av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1237
1238
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 108 for (i = 0; i < priv->datasize; i++) {
1239
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 95 if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1240 44 av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1241 } else {
1242 51 av_bprint_chars(&bprint, priv->data[i], 1);
1243 }
1244 }
1245
1246
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 13 if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1247 ✗ av_free(key);
1248 ✗ return ret;
1249 }
1250
1251
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 13 if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1252 ✗ return ret;
1253 }
1254 }
1255 }
1256
1257 13 return 0;
1258 }
1259
1260 10 int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
1261 {
1262 10 return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);
1263 }
1264