FFmpeg  4.3
id3v2.c
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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 "libavcodec/png.h"
40 #include "avio_internal.h"
41 #include "internal.h"
42 #include "id3v1.h"
43 #include "id3v2.h"
44 
46  { "TALB", "album" },
47  { "TCOM", "composer" },
48  { "TCON", "genre" },
49  { "TCOP", "copyright" },
50  { "TENC", "encoded_by" },
51  { "TIT2", "title" },
52  { "TLAN", "language" },
53  { "TPE1", "artist" },
54  { "TPE2", "album_artist" },
55  { "TPE3", "performer" },
56  { "TPOS", "disc" },
57  { "TPUB", "publisher" },
58  { "TRCK", "track" },
59  { "TSSE", "encoder" },
60  { "USLT", "lyrics" },
61  { 0 }
62 };
63 
65  { "TCMP", "compilation" },
66  { "TDRC", "date" },
67  { "TDRL", "date" },
68  { "TDEN", "creation_time" },
69  { "TSOA", "album-sort" },
70  { "TSOP", "artist-sort" },
71  { "TSOT", "title-sort" },
72  { 0 }
73 };
74 
76  { "TAL", "album" },
77  { "TCO", "genre" },
78  { "TCP", "compilation" },
79  { "TT2", "title" },
80  { "TEN", "encoded_by" },
81  { "TP1", "artist" },
82  { "TP2", "album_artist" },
83  { "TP3", "performer" },
84  { "TRK", "track" },
85  { 0 }
86 };
87 
88 const char ff_id3v2_tags[][4] = {
89  "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
90  "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
91  "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
92  "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
93  { 0 },
94 };
95 
96 const char ff_id3v2_4_tags[][4] = {
97  "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
98  "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
99  { 0 },
100 };
101 
102 const char ff_id3v2_3_tags[][4] = {
103  "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
104  { 0 },
105 };
106 
107 const char * const ff_id3v2_picture_types[21] = {
108  "Other",
109  "32x32 pixels 'file icon'",
110  "Other file icon",
111  "Cover (front)",
112  "Cover (back)",
113  "Leaflet page",
114  "Media (e.g. label side of CD)",
115  "Lead artist/lead performer/soloist",
116  "Artist/performer",
117  "Conductor",
118  "Band/Orchestra",
119  "Composer",
120  "Lyricist/text writer",
121  "Recording Location",
122  "During recording",
123  "During performance",
124  "Movie/video screen capture",
125  "A bright coloured fish",
126  "Illustration",
127  "Band/artist logotype",
128  "Publisher/Studio logotype",
129 };
130 
132  { "image/gif", AV_CODEC_ID_GIF },
133  { "image/jpeg", AV_CODEC_ID_MJPEG },
134  { "image/jpg", AV_CODEC_ID_MJPEG },
135  { "image/png", AV_CODEC_ID_PNG },
136  { "image/tiff", AV_CODEC_ID_TIFF },
137  { "image/bmp", AV_CODEC_ID_BMP },
138  { "JPG", AV_CODEC_ID_MJPEG }, /* ID3v2.2 */
139  { "PNG", AV_CODEC_ID_PNG }, /* ID3v2.2 */
140  { "", AV_CODEC_ID_NONE },
141 };
142 
143 int ff_id3v2_match(const uint8_t *buf, const char *magic)
144 {
145  return buf[0] == magic[0] &&
146  buf[1] == magic[1] &&
147  buf[2] == magic[2] &&
148  buf[3] != 0xff &&
149  buf[4] != 0xff &&
150  (buf[6] & 0x80) == 0 &&
151  (buf[7] & 0x80) == 0 &&
152  (buf[8] & 0x80) == 0 &&
153  (buf[9] & 0x80) == 0;
154 }
155 
156 int ff_id3v2_tag_len(const uint8_t *buf)
157 {
158  int len = ((buf[6] & 0x7f) << 21) +
159  ((buf[7] & 0x7f) << 14) +
160  ((buf[8] & 0x7f) << 7) +
161  (buf[9] & 0x7f) +
163  if (buf[5] & 0x10)
164  len += ID3v2_HEADER_SIZE;
165  return len;
166 }
167 
168 static unsigned int get_size(AVIOContext *s, int len)
169 {
170  int v = 0;
171  while (len--)
172  v = (v << 7) + (avio_r8(s) & 0x7F);
173  return v;
174 }
175 
176 static unsigned int size_to_syncsafe(unsigned int size)
177 {
178  return (((size) & (0x7f << 0)) >> 0) +
179  (((size) & (0x7f << 8)) >> 1) +
180  (((size) & (0x7f << 16)) >> 2) +
181  (((size) & (0x7f << 24)) >> 3);
182 }
183 
184 /* No real verification, only check that the tag consists of
185  * a combination of capital alpha-numerical characters */
186 static int is_tag(const char *buf, unsigned int len)
187 {
188  if (!len)
189  return 0;
190 
191  while (len--)
192  if ((buf[len] < 'A' ||
193  buf[len] > 'Z') &&
194  (buf[len] < '0' ||
195  buf[len] > '9'))
196  return 0;
197 
198  return 1;
199 }
200 
201 /**
202  * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
203  */
204 static int check_tag(AVIOContext *s, int offset, unsigned int len)
205 {
206  char tag[4];
207 
208  if (len > 4 ||
209  avio_seek(s, offset, SEEK_SET) < 0 ||
210  avio_read(s, tag, len) < (int)len)
211  return -1;
212  else if (!AV_RB32(tag) || is_tag(tag, len))
213  return 1;
214 
215  return 0;
216 }
217 
218 /**
219  * Free GEOB type extra metadata.
220  */
221 static void free_geobtag(void *obj)
222 {
223  ID3v2ExtraMetaGEOB *geob = obj;
224  av_freep(&geob->mime_type);
225  av_freep(&geob->file_name);
226  av_freep(&geob->description);
227  av_freep(&geob->data);
228 }
229 
230 /**
231  * Decode characters to UTF-8 according to encoding type. The decoded buffer is
232  * always null terminated. Stop reading when either *maxread bytes are read from
233  * pb or U+0000 character is found.
234  *
235  * @param dst Pointer where the address of the buffer with the decoded bytes is
236  * stored. Buffer must be freed by caller.
237  * @param maxread Pointer to maximum number of characters to read from the
238  * AVIOContext. After execution the value is decremented by the number of bytes
239  * actually read.
240  * @returns 0 if no error occurred, dst is uninitialized on error
241  */
242 static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
243  uint8_t **dst, int *maxread)
244 {
245  int ret;
246  uint8_t tmp;
247  uint32_t ch = 1;
248  int left = *maxread;
249  unsigned int (*get)(AVIOContext*) = avio_rb16;
250  AVIOContext *dynbuf;
251 
252  if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
253  av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
254  return ret;
255  }
256 
257  switch (encoding) {
259  while (left && ch) {
260  ch = avio_r8(pb);
261  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
262  left--;
263  }
264  break;
265 
267  if ((left -= 2) < 0) {
268  av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n");
269  ffio_free_dyn_buf(&dynbuf);
270  *dst = NULL;
271  return AVERROR_INVALIDDATA;
272  }
273  switch (avio_rb16(pb)) {
274  case 0xfffe:
275  get = avio_rl16;
276  case 0xfeff:
277  break;
278  default:
279  av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
280  ffio_free_dyn_buf(&dynbuf);
281  *dst = NULL;
282  *maxread = left;
283  return AVERROR_INVALIDDATA;
284  }
285  // fall-through
286 
288  while ((left > 1) && ch) {
289  GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
290  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
291  }
292  if (left < 0)
293  left += 2; /* did not read last char from pb */
294  break;
295 
296  case ID3v2_ENCODING_UTF8:
297  while (left && ch) {
298  ch = avio_r8(pb);
299  avio_w8(dynbuf, ch);
300  left--;
301  }
302  break;
303  default:
304  av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
305  }
306 
307  if (ch)
308  avio_w8(dynbuf, 0);
309 
310  avio_close_dyn_buf(dynbuf, dst);
311  *maxread = left;
312 
313  return 0;
314 }
315 
316 /**
317  * Parse a text tag.
318  */
319 static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
320  AVDictionary **metadata, const char *key)
321 {
322  uint8_t *dst;
323  int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
324  unsigned genre;
325 
326  if (taglen < 1)
327  return;
328 
329  encoding = avio_r8(pb);
330  taglen--; /* account for encoding type byte */
331 
332  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
333  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
334  return;
335  }
336 
337  if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
338  (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
339  genre <= ID3v1_GENRE_MAX) {
340  av_freep(&dst);
341  dst = av_strdup(ff_id3v1_genre_str[genre]);
342  } else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
343  /* dst now contains the key, need to get value */
344  key = dst;
345  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
346  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
347  av_freep(&key);
348  return;
349  }
350  dict_flags |= AV_DICT_DONT_STRDUP_KEY;
351  } else if (!*dst)
352  av_freep(&dst);
353 
354  if (dst)
355  av_dict_set(metadata, key, dst, dict_flags);
356 }
357 
358 static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
359  AVDictionary **metadata)
360 {
361  uint8_t lang[4];
362  uint8_t *descriptor = NULL; // 'Content descriptor'
363  uint8_t *text;
364  char *key;
365  int encoding;
366  int ok = 0;
367 
368  if (taglen < 1)
369  goto error;
370 
371  encoding = avio_r8(pb);
372  taglen--;
373 
374  if (avio_read(pb, lang, 3) < 3)
375  goto error;
376  lang[3] = '\0';
377  taglen -= 3;
378 
379  if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0)
380  goto error;
381 
382  if (decode_str(s, pb, encoding, &text, &taglen) < 0)
383  goto error;
384 
385  // FFmpeg does not support hierarchical metadata, so concatenate the keys.
386  key = av_asprintf("lyrics-%s%s%s", descriptor[0] ? (char *)descriptor : "",
387  descriptor[0] ? "-" : "",
388  lang);
389  if (!key) {
390  av_free(text);
391  goto error;
392  }
393 
394  av_dict_set(metadata, key, text,
396 
397  ok = 1;
398 error:
399  if (!ok)
400  av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
401  av_free(descriptor);
402 }
403 
404 /**
405  * Parse a comment tag.
406  */
407 static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
408  AVDictionary **metadata)
409 {
410  const char *key = "comment";
411  uint8_t *dst;
412  int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
413  av_unused int language;
414 
415  if (taglen < 4)
416  return;
417 
418  encoding = avio_r8(pb);
419  language = avio_rl24(pb);
420  taglen -= 4;
421 
422  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
423  av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
424  return;
425  }
426 
427  if (dst && !*dst)
428  av_freep(&dst);
429 
430  if (dst) {
431  key = (const char *) dst;
432  dict_flags |= AV_DICT_DONT_STRDUP_KEY;
433  }
434 
435  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
436  av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
437  if (dict_flags & AV_DICT_DONT_STRDUP_KEY)
438  av_freep((void*)&key);
439  return;
440  }
441 
442  if (dst)
443  av_dict_set(metadata, key, (const char *) dst, dict_flags);
444 }
445 
446 /**
447  * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
448  */
449 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
450  const char *tag, ID3v2ExtraMeta **extra_meta,
451  int isv34)
452 {
453  ID3v2ExtraMetaGEOB *geob_data = NULL;
454  ID3v2ExtraMeta *new_extra = NULL;
455  char encoding;
456  unsigned int len;
457 
458  if (taglen < 1)
459  return;
460 
461  new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
462  if (!new_extra) {
463  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
464  sizeof(ID3v2ExtraMeta));
465  return;
466  }
467 
468  geob_data = &new_extra->data.geob;
469 
470  /* read encoding type byte */
471  encoding = avio_r8(pb);
472  taglen--;
473 
474  /* read MIME type (always ISO-8859) */
475  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
476  &taglen) < 0 ||
477  taglen <= 0)
478  goto fail;
479 
480  /* read file name */
481  if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
482  taglen <= 0)
483  goto fail;
484 
485  /* read content description */
486  if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
487  taglen < 0)
488  goto fail;
489 
490  if (taglen) {
491  /* save encapsulated binary data */
492  geob_data->data = av_malloc(taglen);
493  if (!geob_data->data) {
494  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
495  goto fail;
496  }
497  if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
499  "Error reading GEOB frame, data truncated.\n");
500  geob_data->datasize = len;
501  } else {
502  geob_data->data = NULL;
503  geob_data->datasize = 0;
504  }
505 
506  /* add data to the list */
507  new_extra->tag = "GEOB";
508  new_extra->next = *extra_meta;
509  *extra_meta = new_extra;
510 
511  return;
512 
513 fail:
514  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
515  free_geobtag(geob_data);
516  av_free(new_extra);
517  return;
518 }
519 
520 static int is_number(const char *str)
521 {
522  while (*str >= '0' && *str <= '9')
523  str++;
524  return !*str;
525 }
526 
528 {
530  if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
531  strlen(t->value) == 4 && is_number(t->value))
532  return t;
533  return NULL;
534 }
535 
536 static void merge_date(AVDictionary **m)
537 {
539  char date[17] = { 0 }; // YYYY-MM-DD hh:mm
540 
541  if (!(t = get_date_tag(*m, "TYER")) &&
542  !(t = get_date_tag(*m, "TYE")))
543  return;
544  av_strlcpy(date, t->value, 5);
545  av_dict_set(m, "TYER", NULL, 0);
546  av_dict_set(m, "TYE", NULL, 0);
547 
548  if (!(t = get_date_tag(*m, "TDAT")) &&
549  !(t = get_date_tag(*m, "TDA")))
550  goto finish;
551  snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
552  av_dict_set(m, "TDAT", NULL, 0);
553  av_dict_set(m, "TDA", NULL, 0);
554 
555  if (!(t = get_date_tag(*m, "TIME")) &&
556  !(t = get_date_tag(*m, "TIM")))
557  goto finish;
558  snprintf(date + 10, sizeof(date) - 10,
559  " %.2s:%.2s", t->value, t->value + 2);
560  av_dict_set(m, "TIME", NULL, 0);
561  av_dict_set(m, "TIM", NULL, 0);
562 
563 finish:
564  if (date[0])
565  av_dict_set(m, "date", date, 0);
566 }
567 
568 static void free_apic(void *obj)
569 {
570  ID3v2ExtraMetaAPIC *apic = obj;
571  av_buffer_unref(&apic->buf);
572  av_freep(&apic->description);
573 }
574 
575 static void rstrip_spaces(char *buf)
576 {
577  size_t len = strlen(buf);
578  while (len > 0 && buf[len - 1] == ' ')
579  buf[--len] = 0;
580 }
581 
582 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
583  const char *tag, ID3v2ExtraMeta **extra_meta,
584  int isv34)
585 {
586  int enc, pic_type;
587  char mimetype[64] = {0};
588  const CodecMime *mime = ff_id3v2_mime_tags;
589  enum AVCodecID id = AV_CODEC_ID_NONE;
590  ID3v2ExtraMetaAPIC *apic = NULL;
591  ID3v2ExtraMeta *new_extra = NULL;
592  int64_t end = avio_tell(pb) + taglen;
593 
594  if (taglen <= 4 || (!isv34 && taglen <= 6))
595  goto fail;
596 
597  new_extra = av_mallocz(sizeof(*new_extra));
598  if (!new_extra)
599  goto fail;
600 
601  apic = &new_extra->data.apic;
602 
603  enc = avio_r8(pb);
604  taglen--;
605 
606  /* mimetype */
607  if (isv34) {
608  taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
609  } else {
610  if (avio_read(pb, mimetype, 3) < 0)
611  goto fail;
612 
613  mimetype[3] = 0;
614  taglen -= 3;
615  }
616 
617  while (mime->id != AV_CODEC_ID_NONE) {
618  if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
619  id = mime->id;
620  break;
621  }
622  mime++;
623  }
624  if (id == AV_CODEC_ID_NONE) {
626  "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
627  goto fail;
628  }
629  apic->id = id;
630 
631  /* picture type */
632  pic_type = avio_r8(pb);
633  taglen--;
634  if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
635  av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
636  pic_type);
637  pic_type = 0;
638  }
639  apic->type = ff_id3v2_picture_types[pic_type];
640 
641  /* description and picture data */
642  if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
643  av_log(s, AV_LOG_ERROR,
644  "Error decoding attached picture description.\n");
645  goto fail;
646  }
647 
649  if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
650  goto fail;
651  memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
652 
653  new_extra->tag = "APIC";
654  new_extra->next = *extra_meta;
655  *extra_meta = new_extra;
656 
657  // The description must be unique, and some ID3v2 tag writers add spaces
658  // to write several APIC entries with the same description.
659  rstrip_spaces(apic->description);
660 
661  return;
662 
663 fail:
664  if (apic)
665  free_apic(apic);
666  av_freep(&new_extra);
667  avio_seek(pb, end, SEEK_SET);
668 }
669 
670 static void free_chapter(void *obj)
671 {
672  ID3v2ExtraMetaCHAP *chap = obj;
673  av_freep(&chap->element_id);
674  av_dict_free(&chap->meta);
675 }
676 
677 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
678 {
679  int taglen;
680  char tag[5];
681  ID3v2ExtraMeta *new_extra = NULL;
682  ID3v2ExtraMetaCHAP *chap = NULL;
683 
684  new_extra = av_mallocz(sizeof(*new_extra));
685  if (!new_extra)
686  return;
687 
688  chap = &new_extra->data.chap;
689 
690  if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
691  goto fail;
692 
693  if (len < 16)
694  goto fail;
695 
696  chap->start = avio_rb32(pb);
697  chap->end = avio_rb32(pb);
698  avio_skip(pb, 8);
699 
700  len -= 16;
701  while (len > 10) {
702  if (avio_read(pb, tag, 4) < 4)
703  goto fail;
704  tag[4] = 0;
705  taglen = avio_rb32(pb);
706  avio_skip(pb, 2);
707  len -= 10;
708  if (taglen < 0 || taglen > len)
709  goto fail;
710  if (tag[0] == 'T')
711  read_ttag(s, pb, taglen, &chap->meta, tag);
712  else
713  avio_skip(pb, taglen);
714  len -= taglen;
715  }
716 
717  ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv);
718  ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv);
719 
720  new_extra->tag = "CHAP";
721  new_extra->next = *extra_meta;
722  *extra_meta = new_extra;
723 
724  return;
725 
726 fail:
727  free_chapter(chap);
728  av_freep(&new_extra);
729 }
730 
731 static void free_priv(void *obj)
732 {
733  ID3v2ExtraMetaPRIV *priv = obj;
734  av_freep(&priv->owner);
735  av_freep(&priv->data);
736 }
737 
738 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
739  const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
740 {
741  ID3v2ExtraMeta *meta;
742  ID3v2ExtraMetaPRIV *priv;
743 
744  meta = av_mallocz(sizeof(*meta));
745  if (!meta)
746  return;
747 
748  priv = &meta->data.priv;
749 
750  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
751  goto fail;
752 
753  priv->data = av_malloc(taglen);
754  if (!priv->data)
755  goto fail;
756 
757  priv->datasize = taglen;
758 
759  if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
760  goto fail;
761 
762  meta->tag = "PRIV";
763  meta->next = *extra_meta;
764  *extra_meta = meta;
765 
766  return;
767 
768 fail:
769  free_priv(priv);
770  av_freep(&meta);
771 }
772 
773 typedef struct ID3v2EMFunc {
774  const char *tag3;
775  const char *tag4;
776  void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
777  const char *tag, ID3v2ExtraMeta **extra_meta,
778  int isv34);
779  void (*free)(void *obj);
780 } ID3v2EMFunc;
781 
783  { "GEO", "GEOB", read_geobtag, free_geobtag },
784  { "PIC", "APIC", read_apic, free_apic },
785  { "CHAP","CHAP", read_chapter, free_chapter },
786  { "PRIV","PRIV", read_priv, free_priv },
787  { NULL }
788 };
789 
790 /**
791  * Get the corresponding ID3v2EMFunc struct for a tag.
792  * @param isv34 Determines if v2.2 or v2.3/4 strings are used
793  * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
794  */
795 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
796 {
797  int i = 0;
798  while (id3v2_extra_meta_funcs[i].tag3) {
799  if (tag && !memcmp(tag,
800  (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
801  id3v2_extra_meta_funcs[i].tag3),
802  (isv34 ? 4 : 3)))
803  return &id3v2_extra_meta_funcs[i];
804  i++;
805  }
806  return NULL;
807 }
808 
809 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
811  uint8_t flags, ID3v2ExtraMeta **extra_meta)
812 {
813  int isv34, unsync;
814  unsigned tlen;
815  char tag[5];
816  int64_t next, end = avio_tell(pb) + len;
817  int taghdrlen;
818  const char *reason = NULL;
819  AVIOContext pb_local;
820  AVIOContext *pbx;
821  unsigned char *buffer = NULL;
822  int buffer_size = 0;
823  const ID3v2EMFunc *extra_func = NULL;
824  unsigned char *uncompressed_buffer = NULL;
825  av_unused int uncompressed_buffer_size = 0;
826  const char *comm_frame;
827 
828  av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
829 
830  switch (version) {
831  case 2:
832  if (flags & 0x40) {
833  reason = "compression";
834  goto error;
835  }
836  isv34 = 0;
837  taghdrlen = 6;
838  comm_frame = "COM";
839  break;
840 
841  case 3:
842  case 4:
843  isv34 = 1;
844  taghdrlen = 10;
845  comm_frame = "COMM";
846  break;
847 
848  default:
849  reason = "version";
850  goto error;
851  }
852 
853  unsync = flags & 0x80;
854 
855  if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
856  int extlen = get_size(pb, 4);
857  if (version == 4)
858  /* In v2.4 the length includes the length field we just read. */
859  extlen -= 4;
860 
861  if (extlen < 0) {
862  reason = "invalid extended header length";
863  goto error;
864  }
865  avio_skip(pb, extlen);
866  len -= extlen + 4;
867  if (len < 0) {
868  reason = "extended header too long.";
869  goto error;
870  }
871  }
872 
873  while (len >= taghdrlen) {
874  unsigned int tflags = 0;
875  int tunsync = 0;
876  int tcomp = 0;
877  int tencr = 0;
878  unsigned long av_unused dlen;
879 
880  if (isv34) {
881  if (avio_read(pb, tag, 4) < 4)
882  break;
883  tag[4] = 0;
884  if (version == 3) {
885  tlen = avio_rb32(pb);
886  } else {
887  /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
888  * so check the next tag to see which one to use */
889  tlen = avio_rb32(pb);
890  if (tlen > 0x7f) {
891  if (tlen < len) {
892  int64_t cur = avio_tell(pb);
893 
894  if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
895  break;
896 
897  if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
898  tlen = size_to_syncsafe(tlen);
899  else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
900  break;
901  avio_seek(pb, cur, SEEK_SET);
902  } else
903  tlen = size_to_syncsafe(tlen);
904  }
905  }
906  tflags = avio_rb16(pb);
907  tunsync = tflags & ID3v2_FLAG_UNSYNCH;
908  } else {
909  if (avio_read(pb, tag, 3) < 3)
910  break;
911  tag[3] = 0;
912  tlen = avio_rb24(pb);
913  }
914  if (tlen > (1<<28))
915  break;
916  len -= taghdrlen + tlen;
917 
918  if (len < 0)
919  break;
920 
921  next = avio_tell(pb) + tlen;
922 
923  if (!tlen) {
924  if (tag[0])
925  av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
926  tag);
927  continue;
928  }
929 
930  if (tflags & ID3v2_FLAG_DATALEN) {
931  if (tlen < 4)
932  break;
933  dlen = avio_rb32(pb);
934  tlen -= 4;
935  } else
936  dlen = tlen;
937 
938  tcomp = tflags & ID3v2_FLAG_COMPRESSION;
939  tencr = tflags & ID3v2_FLAG_ENCRYPTION;
940 
941  /* skip encrypted tags and, if no zlib, compressed tags */
942  if (tencr || (!CONFIG_ZLIB && tcomp)) {
943  const char *type;
944  if (!tcomp)
945  type = "encrypted";
946  else if (!tencr)
947  type = "compressed";
948  else
949  type = "encrypted and compressed";
950 
951  av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
952  avio_skip(pb, tlen);
953  /* check for text tag or supported special meta tag */
954  } else if (tag[0] == 'T' ||
955  !memcmp(tag, "USLT", 4) ||
956  !strcmp(tag, comm_frame) ||
957  (extra_meta &&
958  (extra_func = get_extra_meta_func(tag, isv34)))) {
959  pbx = pb;
960 
961  if (unsync || tunsync || tcomp) {
962  av_fast_malloc(&buffer, &buffer_size, tlen);
963  if (!buffer) {
964  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
965  goto seek;
966  }
967  }
968  if (unsync || tunsync) {
969  uint8_t *b = buffer;
970  uint8_t *t = buffer;
971  uint8_t *end = t + tlen;
972 
973  if (avio_read(pb, buffer, tlen) != tlen) {
974  av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
975  goto seek;
976  }
977 
978  while (t != end) {
979  *b++ = *t++;
980  if (t != end && t[-1] == 0xff && !t[0])
981  t++;
982  }
983 
984  ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL,
985  NULL);
986  tlen = b - buffer;
987  pbx = &pb_local; // read from sync buffer
988  }
989 
990 #if CONFIG_ZLIB
991  if (tcomp) {
992  int err;
993 
994  av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
995 
996  av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
997  if (!uncompressed_buffer) {
998  av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
999  goto seek;
1000  }
1001 
1002  if (!(unsync || tunsync)) {
1003  err = avio_read(pb, buffer, tlen);
1004  if (err < 0) {
1005  av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1006  goto seek;
1007  }
1008  tlen = err;
1009  }
1010 
1011  err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1012  if (err != Z_OK) {
1013  av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1014  goto seek;
1015  }
1016  ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL);
1017  tlen = dlen;
1018  pbx = &pb_local; // read from sync buffer
1019  }
1020 #endif
1021  if (tag[0] == 'T')
1022  /* parse text tag */
1023  read_ttag(s, pbx, tlen, metadata, tag);
1024  else if (!memcmp(tag, "USLT", 4))
1025  read_uslt(s, pbx, tlen, metadata);
1026  else if (!strcmp(tag, comm_frame))
1027  read_comment(s, pbx, tlen, metadata);
1028  else
1029  /* parse special meta tag */
1030  extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1031  } else if (!tag[0]) {
1032  if (tag[1])
1033  av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1034  avio_skip(pb, tlen);
1035  break;
1036  }
1037  /* Skip to end of tag */
1038 seek:
1039  avio_seek(pb, next, SEEK_SET);
1040  }
1041 
1042  /* Footer preset, always 10 bytes, skip over it */
1043  if (version == 4 && flags & 0x10)
1044  end += 10;
1045 
1046 error:
1047  if (reason)
1048  av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1049  version, reason);
1050  avio_seek(pb, end, SEEK_SET);
1051  av_free(buffer);
1052  av_free(uncompressed_buffer);
1053  return;
1054 }
1055 
1056 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1057  AVFormatContext *s, const char *magic,
1058  ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
1059 {
1060  int len, ret;
1062  int found_header;
1063  int64_t start, off;
1064 
1065  if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1066  return;
1067 
1068  start = avio_tell(pb);
1069  do {
1070  /* save the current offset in case there's nothing to read/skip */
1071  off = avio_tell(pb);
1072  if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1073  avio_seek(pb, off, SEEK_SET);
1074  break;
1075  }
1076 
1078  if (ret >= 0)
1079  ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1080  if (ret != ID3v2_HEADER_SIZE) {
1081  avio_seek(pb, off, SEEK_SET);
1082  break;
1083  }
1084  found_header = ff_id3v2_match(buf, magic);
1085  if (found_header) {
1086  /* parse ID3v2 header */
1087  len = ((buf[6] & 0x7f) << 21) |
1088  ((buf[7] & 0x7f) << 14) |
1089  ((buf[8] & 0x7f) << 7) |
1090  (buf[9] & 0x7f);
1091  id3v2_parse(pb, metadata, s, len, buf[3], buf[5], extra_meta);
1092  } else {
1093  avio_seek(pb, off, SEEK_SET);
1094  }
1095  } while (found_header);
1096  ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1097  ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1098  ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1099  merge_date(metadata);
1100 }
1101 
1103  const char *magic, ID3v2ExtraMeta **extra_meta)
1104 {
1105  id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1106 }
1107 
1108 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1109  ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1110 {
1111  id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1112 }
1113 
1115 {
1116  ID3v2ExtraMeta *current = *extra_meta, *next;
1117  const ID3v2EMFunc *extra_func;
1118 
1119  while (current) {
1120  if ((extra_func = get_extra_meta_func(current->tag, 1)))
1121  extra_func->free(&current->data);
1122  next = current->next;
1123  av_freep(&current);
1124  current = next;
1125  }
1126 
1127  *extra_meta = NULL;
1128 }
1129 
1131 {
1132  ID3v2ExtraMeta *cur;
1133 
1134  for (cur = extra_meta; cur; cur = cur->next) {
1135  ID3v2ExtraMetaAPIC *apic;
1136  AVStream *st;
1137 
1138  if (strcmp(cur->tag, "APIC"))
1139  continue;
1140  apic = &cur->data.apic;
1141 
1142  if (!(st = avformat_new_stream(s, NULL)))
1143  return AVERROR(ENOMEM);
1144 
1147  st->codecpar->codec_id = apic->id;
1148 
1149  if (AV_RB64(apic->buf->data) == PNGSIG)
1151 
1152  if (apic->description[0])
1153  av_dict_set(&st->metadata, "title", apic->description, 0);
1154 
1155  av_dict_set(&st->metadata, "comment", apic->type, 0);
1156 
1158  st->attached_pic.buf = apic->buf;
1159  st->attached_pic.data = apic->buf->data;
1161  st->attached_pic.stream_index = st->index;
1163 
1164  apic->buf = NULL;
1165  }
1166 
1167  return 0;
1168 }
1169 
1171 {
1172  int ret = 0;
1173  ID3v2ExtraMeta *cur;
1174  AVRational time_base = {1, 1000};
1175  ID3v2ExtraMetaCHAP **chapters = NULL;
1176  int num_chapters = 0;
1177  int i;
1178 
1179  // since extra_meta is a linked list where elements are prepended,
1180  // we need to reverse the order of chapters
1181  for (cur = extra_meta; cur; cur = cur->next) {
1182  ID3v2ExtraMetaCHAP *chap;
1183 
1184  if (strcmp(cur->tag, "CHAP"))
1185  continue;
1186  chap = &cur->data.chap;
1187 
1188  if ((ret = av_dynarray_add_nofree(&chapters, &num_chapters, chap)) < 0)
1189  goto end;
1190  }
1191 
1192  for (i = 0; i < (num_chapters / 2); i++) {
1193  ID3v2ExtraMetaCHAP *right;
1194  int right_index;
1195 
1196  right_index = (num_chapters - 1) - i;
1197  right = chapters[right_index];
1198 
1199  chapters[right_index] = chapters[i];
1200  chapters[i] = right;
1201  }
1202 
1203  for (i = 0; i < num_chapters; i++) {
1204  ID3v2ExtraMetaCHAP *chap;
1205  AVChapter *chapter;
1206 
1207  chap = chapters[i];
1208  chapter = avpriv_new_chapter(s, i, time_base, chap->start, chap->end, chap->element_id);
1209  if (!chapter)
1210  continue;
1211 
1212  if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1213  goto end;
1214  }
1215 
1216 end:
1217  av_freep(&chapters);
1218  return ret;
1219 }
1220 
1222 {
1223  ID3v2ExtraMeta *cur;
1225 
1226  for (cur = extra_meta; cur; cur = cur->next) {
1227  if (!strcmp(cur->tag, "PRIV")) {
1228  ID3v2ExtraMetaPRIV *priv = &cur->data.priv;
1229  AVBPrint bprint;
1230  char *escaped, *key;
1231  int i, ret;
1232 
1233  if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1234  return AVERROR(ENOMEM);
1235  }
1236 
1237  av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1238 
1239  for (i = 0; i < priv->datasize; i++) {
1240  if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1241  av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1242  } else {
1243  av_bprint_chars(&bprint, priv->data[i], 1);
1244  }
1245  }
1246 
1247  if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1248  av_free(key);
1249  return ret;
1250  }
1251 
1252  if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1253  return ret;
1254  }
1255  }
1256  }
1257 
1258  return 0;
1259 }
1260 
1262 {
1263  return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);
1264 }
#define NULL
Definition: coverity.c:32
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1261
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void av_bprintf(AVBPrint *buf, const char *fmt,...)
Definition: bprint.c:94
AVDictionary * meta
Definition: id3v2.h:81
version
Definition: libkvazaar.c:292
ID3v2ExtraMetaPRIV priv
Definition: id3v2.h:91
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
int size
union ID3v2ExtraMeta::@255 data
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1401
static int is_number(const char *str)
Definition: id3v2.c:520
static AVDictionaryEntry * get_date_tag(AVDictionary *m, const char *tag)
Definition: id3v2.c:527
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define AV_RB64
Definition: intreadwrite.h:164
#define AV_DICT_DONT_OVERWRITE
Don&#39;t overwrite existing entries.
Definition: dict.h:79
static const ID3v2EMFunc id3v2_extra_meta_funcs[]
Definition: id3v2.c:782
static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, int len, uint8_t version, uint8_t flags, ID3v2ExtraMeta **extra_meta)
Definition: id3v2.c:809
const char * tag3
Definition: id3v2.c:774
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
uint8_t * element_id
Definition: id3v2.h:79
uint32_t datasize
Definition: id3v2.h:58
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
const char * b
Definition: vf_curves.c:116
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
#define ID3v2_PRIV_METADATA_PREFIX
Definition: id3v2.h:42
int av_dict_copy(AVDictionary **dst, const AVDictionary *src, int flags)
Copy entries from one AVDictionary struct into another.
Definition: dict.c:217
static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:582
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
static void free_apic(void *obj)
Definition: id3v2.c:568
const char ff_id3v2_4_tags[][4]
ID3v2.4-only text information frames.
Definition: id3v2.c:96
const char * key
#define PUT_UTF8(val, tmp, PUT_BYTE)
Convert a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
Definition: common.h:480
static void error(const char *err)
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:763
AVDictionary * metadata
Definition: avformat.h:1312
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1356
int av_bprint_finalize(AVBPrint *buf, char **ret_str)
Finalize a print buffer.
Definition: bprint.c:235
static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding, uint8_t **dst, int *maxread)
Decode characters to UTF-8 according to encoding type.
Definition: id3v2.c:242
#define AV_DICT_DONT_STRDUP_KEY
Take ownership of a key that&#39;s been allocated with av_malloc() or another memory allocation function...
Definition: dict.h:73
AVChapter * avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)
Add a new chapter.
Definition: utils.c:4647
Format I/O context.
Definition: avformat.h:1351
char str[32]
Definition: internal.h:48
Public dictionary API.
static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
Definition: id3v2.c:1056
static char buffer[20]
Definition: seek.c:32
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
const AVMetadataConv ff_id3v2_34_metadata_conv[]
Definition: id3v2.c:45
uint8_t
#define av_malloc(s)
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
#define AV_RB32
Definition: intreadwrite.h:130
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:738
uint32_t end
Definition: id3v2.h:80
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1170
uint8_t * description
Definition: id3v2.h:61
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
static void finish(void)
Definition: movenc.c:345
uint8_t * data
Definition: packet.h:355
const char * type
Definition: id3v2.h:67
uint32_t tag
Definition: movenc.c:1532
enum AVCodecID id
Definition: internal.h:49
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:298
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
uint8_t * data
Definition: id3v2.h:62
void(* free)(void *obj)
Definition: id3v2.c:779
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:388
static int is_tag(const char *buf, unsigned int len)
Definition: id3v2.c:186
#define GET_UTF16(val, GET_16BIT, ERROR)
Convert a UTF-16 character (2 or 4 bytes) to its 32-bit UCS-4 encoded form.
Definition: common.h:452
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
Definition: dict.h:69
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
#define AV_BPRINT_SIZE_UNLIMITED
const AVMetadataConv ff_id3v2_4_metadata_conv[]
Definition: id3v2.c:64
#define AVERROR(e)
Definition: error.h:43
void av_bprint_init(AVBPrint *buf, unsigned size_init, unsigned size_max)
Definition: bprint.c:69
static void free_priv(void *obj)
Definition: id3v2.c:731
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: packet.h:338
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1114
#define PNGSIG
Definition: png.h:47
static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata)
Parse a comment tag.
Definition: id3v2.c:407
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
uint8_t * data
Definition: id3v2.h:74
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
#define CONFIG_ZLIB
Definition: config.h:523
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi - 0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64, *(const int64_t *) pi *(1.0f/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64, *(const int64_t *) pi *(1.0/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(UINT64_C(1)<< 63))) #define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={ FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64), };static void cpy1(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, len);} static void cpy2(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 2 *len);} static void cpy4(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 4 *len);} static void cpy8(uint8_t **dst, const uint8_t **src, int len){ memcpy(*dst, *src, 8 *len);} AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags) { AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;if(channels==1){ in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);} ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map) { switch(av_get_bytes_per_sample(in_fmt)){ case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;} } if(HAVE_X86ASM &&HAVE_MMX) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);return ctx;} void swri_audio_convert_free(AudioConvert **ctx) { av_freep(ctx);} int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len) { int ch;int off=0;const int os=(out->planar ? 1 :out->ch_count) *out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask) { int planes=in->planar ? in->ch_count :1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;} if(ctx->out_simd_align_mask) { int planes=out->planar ? out->ch_count :1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;} if(ctx->simd_f &&!ctx->ch_map &&!misaligned){ off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){ if(out->planar==in->planar){ int planes=out->planar ? out->ch_count :1;for(ch=0;ch< planes;ch++){ ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:123
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:361
static unsigned int size_to_syncsafe(unsigned int size)
Definition: id3v2.c:176
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
Definition: mem.c:504
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:771
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that&#39;s been allocated with av_malloc() or another memory allocation functio...
Definition: dict.h:76
static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata, const char *key)
Parse a text tag.
Definition: id3v2.c:319
uint32_t start
Definition: id3v2.h:80
static void free_geobtag(void *obj)
Free GEOB type extra metadata.
Definition: id3v2.c:221
static unsigned int get_size(AVIOContext *s, int len)
Definition: id3v2.c:168
static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
Definition: id3v2.c:449
#define s(width, name)
Definition: cbs_vp9.c:257
#define ID3v2_FLAG_UNSYNCH
Definition: id3v2.h:38
AVDictionary * metadata
Definition: avformat.h:940
uint8_t * owner
Definition: id3v2.h:73
#define FF_ARRAY_ELEMS(a)
#define AV_DISPOSITION_ATTACHED_PIC
The stream is stored in the file as an attached picture/"cover art" (e.g.
Definition: avformat.h:844
static void merge_date(AVDictionary **m)
Definition: id3v2.c:536
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1431
void(* read)(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:776
Stream structure.
Definition: avformat.h:876
const char ff_id3v2_tags[][4]
A list of text information frames allowed in both ID3 v2.3 and v2.4 http://www.id3.org/id3v2.4.0-frames http://www.id3.org/id3v2.4.0-changes.
Definition: id3v2.c:88
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:255
struct ID3v2ExtraMeta * next
Definition: id3v2.h:86
typedef void(RENAME(mix_any_func_type))
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
Definition: buffer.c:67
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:191
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define ID3v2_FLAG_COMPRESSION
Definition: id3v2.h:40
enum AVCodecID id
Definition: id3v2.h:69
uint8_t * description
Definition: id3v2.h:68
ID3v2ExtraMetaAPIC apic
Definition: id3v2.h:88
int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta *extra_meta)
Create a stream for each APIC (attached picture) extracted from the ID3v2 header. ...
Definition: id3v2.c:1130
ID3v2ExtraMetaCHAP chap
Definition: id3v2.h:89
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta *extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1221
Rational number (pair of numerator and denominator).
Definition: rational.h:58
cl_device_type type
#define snprintf
Definition: snprintf.h:34
int size
Size of data in bytes.
Definition: buffer.h:93
static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata)
Definition: id3v2.c:358
#define SIZE_SPECIFIER
Definition: internal.h:262
#define flags(name, subs,...)
Definition: cbs_av1.c:564
static int check_tag(AVIOContext *s, int offset, unsigned int len)
Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error.
Definition: id3v2.c:204
static void rstrip_spaces(char *buf)
Definition: id3v2.c:575
static const ID3v2EMFunc * get_extra_meta_func(const char *tag, int isv34)
Get the corresponding ID3v2EMFunc struct for a tag.
Definition: id3v2.c:795
uint8_t * mime_type
Definition: id3v2.h:59
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:982
static void free_chapter(void *obj)
Definition: id3v2.c:670
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
int
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:143
int ffio_init_context(AVIOContext *s, unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Definition: aviobuf.c:76
const char * tag
Definition: id3v2.h:85
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:929
#define ID3v2_FLAG_ENCRYPTION
Definition: id3v2.h:39
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
const char * tag4
Definition: id3v2.c:775
void ff_id3v2_read(AVFormatContext *s, const char *magic, ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
Read an ID3v2 tag, including supported extra metadata.
Definition: id3v2.c:1108
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
#define AV_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:215
const char ff_id3v2_3_tags[][4]
ID3v2.3-only text information frames.
Definition: id3v2.c:102
uint8_t * file_name
Definition: id3v2.h:60
ID3v2ExtraMetaGEOB geob
Definition: id3v2.h:90
#define av_free(p)
void ff_id3v2_read_dict(AVIOContext *pb, AVDictionary **metadata, const char *magic, ID3v2ExtraMeta **extra_meta)
Read an ID3v2 tag into specified dictionary and retrieve supported extra metadata.
Definition: id3v2.c:1102
char * value
Definition: dict.h:87
int len
int ff_id3v2_tag_len(const uint8_t *buf)
Get the length of an ID3v2 tag.
Definition: id3v2.c:156
AVBufferRef * buf
Definition: id3v2.h:66
uint32_t datasize
Definition: id3v2.h:75
#define av_freep(p)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:107
int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a string from pb into buf.
Definition: aviobuf.c:857
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:739
#define ID3v2_FLAG_DATALEN
Definition: id3v2.h:37
int stream_index
Definition: packet.h:357
#define ID3v1_GENRE_MAX
Definition: id3v1.h:29
const char *const ff_id3v1_genre_str[ID3v1_GENRE_MAX+1]
ID3v1 genres.
Definition: id3v1.c:27
enum AVCodecID id
static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:677
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:958
#define av_unused
Definition: attributes.h:131
static const AVMetadataConv id3v2_2_metadata_conv[]
Definition: id3v2.c:75
void av_bprint_chars(AVBPrint *buf, char c, unsigned n)
Append char c n times to a print buffer.
Definition: bprint.c:140
static uint8_t tmp[11]
Definition: aes_ctr.c:26