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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 "avio_internal.h"
40 #include "internal.h"
41 #include "id3v1.h"
42 #include "id3v2.h"
43 
45  { "TALB", "album" },
46  { "TCOM", "composer" },
47  { "TCON", "genre" },
48  { "TCOP", "copyright" },
49  { "TENC", "encoded_by" },
50  { "TIT2", "title" },
51  { "TLAN", "language" },
52  { "TPE1", "artist" },
53  { "TPE2", "album_artist" },
54  { "TPE3", "performer" },
55  { "TPOS", "disc" },
56  { "TPUB", "publisher" },
57  { "TRCK", "track" },
58  { "TSSE", "encoder" },
59  { "USLT", "lyrics" },
60  { 0 }
61 };
62 
64  { "TCMP", "compilation" },
65  { "TDRC", "date" },
66  { "TDRL", "date" },
67  { "TDEN", "creation_time" },
68  { "TSOA", "album-sort" },
69  { "TSOP", "artist-sort" },
70  { "TSOT", "title-sort" },
71  { 0 }
72 };
73 
75  { "TAL", "album" },
76  { "TCO", "genre" },
77  { "TCP", "compilation" },
78  { "TT2", "title" },
79  { "TEN", "encoded_by" },
80  { "TP1", "artist" },
81  { "TP2", "album_artist" },
82  { "TP3", "performer" },
83  { "TRK", "track" },
84  { 0 }
85 };
86 
87 const char ff_id3v2_tags[][4] = {
88  "TALB", "TBPM", "TCOM", "TCON", "TCOP", "TDLY", "TENC", "TEXT",
89  "TFLT", "TIT1", "TIT2", "TIT3", "TKEY", "TLAN", "TLEN", "TMED",
90  "TOAL", "TOFN", "TOLY", "TOPE", "TOWN", "TPE1", "TPE2", "TPE3",
91  "TPE4", "TPOS", "TPUB", "TRCK", "TRSN", "TRSO", "TSRC", "TSSE",
92  { 0 },
93 };
94 
95 const char ff_id3v2_4_tags[][4] = {
96  "TDEN", "TDOR", "TDRC", "TDRL", "TDTG", "TIPL", "TMCL", "TMOO",
97  "TPRO", "TSOA", "TSOP", "TSOT", "TSST",
98  { 0 },
99 };
100 
101 const char ff_id3v2_3_tags[][4] = {
102  "TDAT", "TIME", "TORY", "TRDA", "TSIZ", "TYER",
103  { 0 },
104 };
105 
106 const char * const ff_id3v2_picture_types[21] = {
107  "Other",
108  "32x32 pixels 'file icon'",
109  "Other file icon",
110  "Cover (front)",
111  "Cover (back)",
112  "Leaflet page",
113  "Media (e.g. label side of CD)",
114  "Lead artist/lead performer/soloist",
115  "Artist/performer",
116  "Conductor",
117  "Band/Orchestra",
118  "Composer",
119  "Lyricist/text writer",
120  "Recording Location",
121  "During recording",
122  "During performance",
123  "Movie/video screen capture",
124  "A bright coloured fish",
125  "Illustration",
126  "Band/artist logotype",
127  "Publisher/Studio logotype",
128 };
129 
131  { "image/gif", AV_CODEC_ID_GIF },
132  { "image/jpeg", AV_CODEC_ID_MJPEG },
133  { "image/jpg", AV_CODEC_ID_MJPEG },
134  { "image/png", AV_CODEC_ID_PNG },
135  { "image/tiff", AV_CODEC_ID_TIFF },
136  { "image/bmp", AV_CODEC_ID_BMP },
137  { "JPG", AV_CODEC_ID_MJPEG }, /* ID3v2.2 */
138  { "PNG", AV_CODEC_ID_PNG }, /* ID3v2.2 */
139  { "", AV_CODEC_ID_NONE },
140 };
141 
142 int ff_id3v2_match(const uint8_t *buf, const char *magic)
143 {
144  return buf[0] == magic[0] &&
145  buf[1] == magic[1] &&
146  buf[2] == magic[2] &&
147  buf[3] != 0xff &&
148  buf[4] != 0xff &&
149  (buf[6] & 0x80) == 0 &&
150  (buf[7] & 0x80) == 0 &&
151  (buf[8] & 0x80) == 0 &&
152  (buf[9] & 0x80) == 0;
153 }
154 
156 {
157  int len = ((buf[6] & 0x7f) << 21) +
158  ((buf[7] & 0x7f) << 14) +
159  ((buf[8] & 0x7f) << 7) +
160  (buf[9] & 0x7f) +
162  if (buf[5] & 0x10)
163  len += ID3v2_HEADER_SIZE;
164  return len;
165 }
166 
167 static unsigned int get_size(AVIOContext *s, int len)
168 {
169  int v = 0;
170  while (len--)
171  v = (v << 7) + (avio_r8(s) & 0x7F);
172  return v;
173 }
174 
175 static unsigned int size_to_syncsafe(unsigned int size)
176 {
177  return (((size) & (0x7f << 0)) >> 0) +
178  (((size) & (0x7f << 8)) >> 1) +
179  (((size) & (0x7f << 16)) >> 2) +
180  (((size) & (0x7f << 24)) >> 3);
181 }
182 
183 /* No real verification, only check that the tag consists of
184  * a combination of capital alpha-numerical characters */
185 static int is_tag(const char *buf, unsigned int len)
186 {
187  if (!len)
188  return 0;
189 
190  while (len--)
191  if ((buf[len] < 'A' ||
192  buf[len] > 'Z') &&
193  (buf[len] < '0' ||
194  buf[len] > '9'))
195  return 0;
196 
197  return 1;
198 }
199 
200 /**
201  * Return 1 if the tag of length len at the given offset is valid, 0 if not, -1 on error
202  */
203 static int check_tag(AVIOContext *s, int offset, unsigned int len)
204 {
205  char tag[4];
206 
207  if (len > 4 ||
208  avio_seek(s, offset, SEEK_SET) < 0 ||
209  avio_read(s, tag, len) < (int)len)
210  return -1;
211  else if (!AV_RB32(tag) || is_tag(tag, len))
212  return 1;
213 
214  return 0;
215 }
216 
217 /**
218  * Free GEOB type extra metadata.
219  */
220 static void free_geobtag(void *obj)
221 {
222  ID3v2ExtraMetaGEOB *geob = obj;
223  av_freep(&geob->mime_type);
224  av_freep(&geob->file_name);
225  av_freep(&geob->description);
226  av_freep(&geob->data);
227  av_free(geob);
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 = NULL;
364  char *key = NULL;
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  goto error;
391 
392  av_dict_set(metadata, key, text, 0);
393 
394  ok = 1;
395 error:
396  if (!ok)
397  av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
398  av_free(descriptor);
399  av_free(text);
400  av_free(key);
401 }
402 
403 /**
404  * Parse a comment tag.
405  */
406 static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen,
407  AVDictionary **metadata)
408 {
409  const char *key = "comment";
410  uint8_t *dst;
411  int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
412  av_unused int language;
413 
414  if (taglen < 4)
415  return;
416 
417  encoding = avio_r8(pb);
418  language = avio_rl24(pb);
419  taglen -= 4;
420 
421  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
422  av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
423  return;
424  }
425 
426  if (dst && !*dst)
427  av_freep(&dst);
428 
429  if (dst) {
430  key = (const char *) dst;
431  dict_flags |= AV_DICT_DONT_STRDUP_KEY;
432  }
433 
434  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
435  av_log(s, AV_LOG_ERROR, "Error reading comment frame, skipped\n");
436  if (dict_flags & AV_DICT_DONT_STRDUP_KEY)
437  av_freep((void*)&key);
438  return;
439  }
440 
441  if (dst)
442  av_dict_set(metadata, key, (const char *) dst, dict_flags);
443 }
444 
445 /**
446  * Parse GEOB tag into a ID3v2ExtraMetaGEOB struct.
447  */
448 static void read_geobtag(AVFormatContext *s, AVIOContext *pb, int taglen,
449  const char *tag, ID3v2ExtraMeta **extra_meta,
450  int isv34)
451 {
452  ID3v2ExtraMetaGEOB *geob_data = NULL;
453  ID3v2ExtraMeta *new_extra = NULL;
454  char encoding;
455  unsigned int len;
456 
457  if (taglen < 1)
458  return;
459 
460  geob_data = av_mallocz(sizeof(ID3v2ExtraMetaGEOB));
461  if (!geob_data) {
462  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
463  sizeof(ID3v2ExtraMetaGEOB));
464  return;
465  }
466 
467  new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
468  if (!new_extra) {
469  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
470  sizeof(ID3v2ExtraMeta));
471  goto fail;
472  }
473 
474  /* read encoding type byte */
475  encoding = avio_r8(pb);
476  taglen--;
477 
478  /* read MIME type (always ISO-8859) */
479  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
480  &taglen) < 0 ||
481  taglen <= 0)
482  goto fail;
483 
484  /* read file name */
485  if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
486  taglen <= 0)
487  goto fail;
488 
489  /* read content description */
490  if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
491  taglen < 0)
492  goto fail;
493 
494  if (taglen) {
495  /* save encapsulated binary data */
496  geob_data->data = av_malloc(taglen);
497  if (!geob_data->data) {
498  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
499  goto fail;
500  }
501  if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
503  "Error reading GEOB frame, data truncated.\n");
504  geob_data->datasize = len;
505  } else {
506  geob_data->data = NULL;
507  geob_data->datasize = 0;
508  }
509 
510  /* add data to the list */
511  new_extra->tag = "GEOB";
512  new_extra->data = geob_data;
513  new_extra->next = *extra_meta;
514  *extra_meta = new_extra;
515 
516  return;
517 
518 fail:
519  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
520  free_geobtag(geob_data);
521  av_free(new_extra);
522  return;
523 }
524 
525 static int is_number(const char *str)
526 {
527  while (*str >= '0' && *str <= '9')
528  str++;
529  return !*str;
530 }
531 
533 {
535  if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
536  strlen(t->value) == 4 && is_number(t->value))
537  return t;
538  return NULL;
539 }
540 
541 static void merge_date(AVDictionary **m)
542 {
544  char date[17] = { 0 }; // YYYY-MM-DD hh:mm
545 
546  if (!(t = get_date_tag(*m, "TYER")) &&
547  !(t = get_date_tag(*m, "TYE")))
548  return;
549  av_strlcpy(date, t->value, 5);
550  av_dict_set(m, "TYER", NULL, 0);
551  av_dict_set(m, "TYE", NULL, 0);
552 
553  if (!(t = get_date_tag(*m, "TDAT")) &&
554  !(t = get_date_tag(*m, "TDA")))
555  goto finish;
556  snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
557  av_dict_set(m, "TDAT", NULL, 0);
558  av_dict_set(m, "TDA", NULL, 0);
559 
560  if (!(t = get_date_tag(*m, "TIME")) &&
561  !(t = get_date_tag(*m, "TIM")))
562  goto finish;
563  snprintf(date + 10, sizeof(date) - 10,
564  " %.2s:%.2s", t->value, t->value + 2);
565  av_dict_set(m, "TIME", NULL, 0);
566  av_dict_set(m, "TIM", NULL, 0);
567 
568 finish:
569  if (date[0])
570  av_dict_set(m, "date", date, 0);
571 }
572 
573 static void free_apic(void *obj)
574 {
575  ID3v2ExtraMetaAPIC *apic = obj;
576  av_buffer_unref(&apic->buf);
577  av_freep(&apic->description);
578  av_freep(&apic);
579 }
580 
581 static void rstrip_spaces(char *buf)
582 {
583  size_t len = strlen(buf);
584  while (len > 0 && buf[len - 1] == ' ')
585  buf[--len] = 0;
586 }
587 
588 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
589  const char *tag, ID3v2ExtraMeta **extra_meta,
590  int isv34)
591 {
592  int enc, pic_type;
593  char mimetype[64];
594  const CodecMime *mime = ff_id3v2_mime_tags;
595  enum AVCodecID id = AV_CODEC_ID_NONE;
596  ID3v2ExtraMetaAPIC *apic = NULL;
597  ID3v2ExtraMeta *new_extra = NULL;
598  int64_t end = avio_tell(pb) + taglen;
599 
600  if (taglen <= 4 || (!isv34 && taglen <= 6))
601  goto fail;
602 
603  new_extra = av_mallocz(sizeof(*new_extra));
604  apic = av_mallocz(sizeof(*apic));
605  if (!new_extra || !apic)
606  goto fail;
607 
608  enc = avio_r8(pb);
609  taglen--;
610 
611  /* mimetype */
612  if (isv34) {
613  taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
614  } else {
615  avio_read(pb, mimetype, 3);
616  mimetype[3] = 0;
617  taglen -= 3;
618  }
619 
620  while (mime->id != AV_CODEC_ID_NONE) {
621  if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
622  id = mime->id;
623  break;
624  }
625  mime++;
626  }
627  if (id == AV_CODEC_ID_NONE) {
629  "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
630  goto fail;
631  }
632  apic->id = id;
633 
634  /* picture type */
635  pic_type = avio_r8(pb);
636  taglen--;
637  if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
638  av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
639  pic_type);
640  pic_type = 0;
641  }
642  apic->type = ff_id3v2_picture_types[pic_type];
643 
644  /* description and picture data */
645  if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
646  av_log(s, AV_LOG_ERROR,
647  "Error decoding attached picture description.\n");
648  goto fail;
649  }
650 
652  if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
653  goto fail;
654  memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
655 
656  new_extra->tag = "APIC";
657  new_extra->data = apic;
658  new_extra->next = *extra_meta;
659  *extra_meta = new_extra;
660 
661  // The description must be unique, and some ID3v2 tag writers add spaces
662  // to write several APIC entries with the same description.
663  rstrip_spaces(apic->description);
664 
665  return;
666 
667 fail:
668  if (apic)
669  free_apic(apic);
670  av_freep(&new_extra);
671  avio_seek(pb, end, SEEK_SET);
672 }
673 
674 static void free_chapter(void *obj)
675 {
676  ID3v2ExtraMetaCHAP *chap = obj;
677  av_freep(&chap->element_id);
678  av_dict_free(&chap->meta);
679  av_freep(&chap);
680 }
681 
682 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
683 {
684  int taglen;
685  char tag[5];
686  ID3v2ExtraMeta *new_extra = NULL;
687  ID3v2ExtraMetaCHAP *chap = NULL;
688 
689  new_extra = av_mallocz(sizeof(*new_extra));
690  chap = av_mallocz(sizeof(*chap));
691 
692  if (!new_extra || !chap)
693  goto fail;
694 
695  if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
696  goto fail;
697 
698  if (len < 16)
699  goto fail;
700 
701  chap->start = avio_rb32(pb);
702  chap->end = avio_rb32(pb);
703  avio_skip(pb, 8);
704 
705  len -= 16;
706  while (len > 10) {
707  if (avio_read(pb, tag, 4) < 4)
708  goto fail;
709  tag[4] = 0;
710  taglen = avio_rb32(pb);
711  avio_skip(pb, 2);
712  len -= 10;
713  if (taglen < 0 || taglen > len)
714  goto fail;
715  if (tag[0] == 'T')
716  read_ttag(s, pb, taglen, &chap->meta, tag);
717  else
718  avio_skip(pb, taglen);
719  len -= taglen;
720  }
721 
722  ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv);
723  ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv);
724 
725  new_extra->tag = "CHAP";
726  new_extra->data = chap;
727  new_extra->next = *extra_meta;
728  *extra_meta = new_extra;
729 
730  return;
731 
732 fail:
733  if (chap)
734  free_chapter(chap);
735  av_freep(&new_extra);
736 }
737 
738 static void free_priv(void *obj)
739 {
740  ID3v2ExtraMetaPRIV *priv = obj;
741  av_freep(&priv->owner);
742  av_freep(&priv->data);
743  av_freep(&priv);
744 }
745 
746 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
747  const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
748 {
749  ID3v2ExtraMeta *meta;
750  ID3v2ExtraMetaPRIV *priv;
751 
752  meta = av_mallocz(sizeof(*meta));
753  priv = av_mallocz(sizeof(*priv));
754 
755  if (!meta || !priv)
756  goto fail;
757 
758  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
759  goto fail;
760 
761  priv->data = av_malloc(taglen);
762  if (!priv->data)
763  goto fail;
764 
765  priv->datasize = taglen;
766 
767  if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
768  goto fail;
769 
770  meta->tag = "PRIV";
771  meta->data = priv;
772  meta->next = *extra_meta;
773  *extra_meta = meta;
774 
775  return;
776 
777 fail:
778  if (priv)
779  free_priv(priv);
780  av_freep(&meta);
781 }
782 
783 typedef struct ID3v2EMFunc {
784  const char *tag3;
785  const char *tag4;
786  void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
787  const char *tag, ID3v2ExtraMeta **extra_meta,
788  int isv34);
789  void (*free)(void *obj);
790 } ID3v2EMFunc;
791 
793  { "GEO", "GEOB", read_geobtag, free_geobtag },
794  { "PIC", "APIC", read_apic, free_apic },
795  { "CHAP","CHAP", read_chapter, free_chapter },
796  { "PRIV","PRIV", read_priv, free_priv },
797  { NULL }
798 };
799 
800 /**
801  * Get the corresponding ID3v2EMFunc struct for a tag.
802  * @param isv34 Determines if v2.2 or v2.3/4 strings are used
803  * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
804  */
805 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
806 {
807  int i = 0;
808  while (id3v2_extra_meta_funcs[i].tag3) {
809  if (tag && !memcmp(tag,
810  (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
811  id3v2_extra_meta_funcs[i].tag3),
812  (isv34 ? 4 : 3)))
813  return &id3v2_extra_meta_funcs[i];
814  i++;
815  }
816  return NULL;
817 }
818 
819 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
821  uint8_t flags, ID3v2ExtraMeta **extra_meta)
822 {
823  int isv34, unsync;
824  unsigned tlen;
825  char tag[5];
826  int64_t next, end = avio_tell(pb) + len;
827  int taghdrlen;
828  const char *reason = NULL;
829  AVIOContext pb_local;
830  AVIOContext *pbx;
831  unsigned char *buffer = NULL;
832  int buffer_size = 0;
833  const ID3v2EMFunc *extra_func = NULL;
834  unsigned char *uncompressed_buffer = NULL;
835  av_unused int uncompressed_buffer_size = 0;
836  const char *comm_frame;
837 
838  av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
839 
840  switch (version) {
841  case 2:
842  if (flags & 0x40) {
843  reason = "compression";
844  goto error;
845  }
846  isv34 = 0;
847  taghdrlen = 6;
848  comm_frame = "COM";
849  break;
850 
851  case 3:
852  case 4:
853  isv34 = 1;
854  taghdrlen = 10;
855  comm_frame = "COMM";
856  break;
857 
858  default:
859  reason = "version";
860  goto error;
861  }
862 
863  unsync = flags & 0x80;
864 
865  if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
866  int extlen = get_size(pb, 4);
867  if (version == 4)
868  /* In v2.4 the length includes the length field we just read. */
869  extlen -= 4;
870 
871  if (extlen < 0) {
872  reason = "invalid extended header length";
873  goto error;
874  }
875  avio_skip(pb, extlen);
876  len -= extlen + 4;
877  if (len < 0) {
878  reason = "extended header too long.";
879  goto error;
880  }
881  }
882 
883  while (len >= taghdrlen) {
884  unsigned int tflags = 0;
885  int tunsync = 0;
886  int tcomp = 0;
887  int tencr = 0;
888  unsigned long av_unused dlen;
889 
890  if (isv34) {
891  if (avio_read(pb, tag, 4) < 4)
892  break;
893  tag[4] = 0;
894  if (version == 3) {
895  tlen = avio_rb32(pb);
896  } else {
897  /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
898  * so check the next tag to see which one to use */
899  tlen = avio_rb32(pb);
900  if (tlen > 0x7f) {
901  if (tlen < len) {
902  int64_t cur = avio_tell(pb);
903 
904  if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
905  break;
906 
907  if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
908  tlen = size_to_syncsafe(tlen);
909  else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
910  break;
911  avio_seek(pb, cur, SEEK_SET);
912  } else
913  tlen = size_to_syncsafe(tlen);
914  }
915  }
916  tflags = avio_rb16(pb);
917  tunsync = tflags & ID3v2_FLAG_UNSYNCH;
918  } else {
919  if (avio_read(pb, tag, 3) < 3)
920  break;
921  tag[3] = 0;
922  tlen = avio_rb24(pb);
923  }
924  if (tlen > (1<<28))
925  break;
926  len -= taghdrlen + tlen;
927 
928  if (len < 0)
929  break;
930 
931  next = avio_tell(pb) + tlen;
932 
933  if (!tlen) {
934  if (tag[0])
935  av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
936  tag);
937  continue;
938  }
939 
940  if (tflags & ID3v2_FLAG_DATALEN) {
941  if (tlen < 4)
942  break;
943  dlen = avio_rb32(pb);
944  tlen -= 4;
945  } else
946  dlen = tlen;
947 
948  tcomp = tflags & ID3v2_FLAG_COMPRESSION;
949  tencr = tflags & ID3v2_FLAG_ENCRYPTION;
950 
951  /* skip encrypted tags and, if no zlib, compressed tags */
952  if (tencr || (!CONFIG_ZLIB && tcomp)) {
953  const char *type;
954  if (!tcomp)
955  type = "encrypted";
956  else if (!tencr)
957  type = "compressed";
958  else
959  type = "encrypted and compressed";
960 
961  av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
962  avio_skip(pb, tlen);
963  /* check for text tag or supported special meta tag */
964  } else if (tag[0] == 'T' ||
965  !memcmp(tag, "USLT", 4) ||
966  !strcmp(tag, comm_frame) ||
967  (extra_meta &&
968  (extra_func = get_extra_meta_func(tag, isv34)))) {
969  pbx = pb;
970 
971  if (unsync || tunsync || tcomp) {
972  av_fast_malloc(&buffer, &buffer_size, tlen);
973  if (!buffer) {
974  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
975  goto seek;
976  }
977  }
978  if (unsync || tunsync) {
979  uint8_t *b = buffer;
980  uint8_t *t = buffer;
981  uint8_t *end = t + tlen;
982 
983  if (avio_read(pb, buffer, tlen) != tlen) {
984  av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
985  goto seek;
986  }
987 
988  while (t != end) {
989  *b++ = *t++;
990  if (t != end && t[-1] == 0xff && !t[0])
991  t++;
992  }
993 
994  ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL,
995  NULL);
996  tlen = b - buffer;
997  pbx = &pb_local; // read from sync buffer
998  }
999 
1000 #if CONFIG_ZLIB
1001  if (tcomp) {
1002  int err;
1003 
1004  av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
1005 
1006  av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
1007  if (!uncompressed_buffer) {
1008  av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
1009  goto seek;
1010  }
1011 
1012  if (!(unsync || tunsync)) {
1013  err = avio_read(pb, buffer, tlen);
1014  if (err < 0) {
1015  av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1016  goto seek;
1017  }
1018  tlen = err;
1019  }
1020 
1021  err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1022  if (err != Z_OK) {
1023  av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1024  goto seek;
1025  }
1026  ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL);
1027  tlen = dlen;
1028  pbx = &pb_local; // read from sync buffer
1029  }
1030 #endif
1031  if (tag[0] == 'T')
1032  /* parse text tag */
1033  read_ttag(s, pbx, tlen, metadata, tag);
1034  else if (!memcmp(tag, "USLT", 4))
1035  read_uslt(s, pbx, tlen, metadata);
1036  else if (!strcmp(tag, comm_frame))
1037  read_comment(s, pbx, tlen, metadata);
1038  else
1039  /* parse special meta tag */
1040  extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1041  } else if (!tag[0]) {
1042  if (tag[1])
1043  av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1044  avio_skip(pb, tlen);
1045  break;
1046  }
1047  /* Skip to end of tag */
1048 seek:
1049  avio_seek(pb, next, SEEK_SET);
1050  }
1051 
1052  /* Footer preset, always 10 bytes, skip over it */
1053  if (version == 4 && flags & 0x10)
1054  end += 10;
1055 
1056 error:
1057  if (reason)
1058  av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1059  version, reason);
1060  avio_seek(pb, end, SEEK_SET);
1061  av_free(buffer);
1062  av_free(uncompressed_buffer);
1063  return;
1064 }
1065 
1066 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1067  AVFormatContext *s, const char *magic,
1068  ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
1069 {
1070  int len, ret;
1072  int found_header;
1073  int64_t start, off;
1074 
1075  if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1076  return;
1077 
1078  start = avio_tell(pb);
1079  do {
1080  /* save the current offset in case there's nothing to read/skip */
1081  off = avio_tell(pb);
1082  if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1083  avio_seek(pb, off, SEEK_SET);
1084  break;
1085  }
1086 
1088  if (ret >= 0)
1089  ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1090  if (ret != ID3v2_HEADER_SIZE) {
1091  avio_seek(pb, off, SEEK_SET);
1092  break;
1093  }
1094  found_header = ff_id3v2_match(buf, magic);
1095  if (found_header) {
1096  /* parse ID3v2 header */
1097  len = ((buf[6] & 0x7f) << 21) |
1098  ((buf[7] & 0x7f) << 14) |
1099  ((buf[8] & 0x7f) << 7) |
1100  (buf[9] & 0x7f);
1101  id3v2_parse(pb, metadata, s, len, buf[3], buf[5], extra_meta);
1102  } else {
1103  avio_seek(pb, off, SEEK_SET);
1104  }
1105  } while (found_header);
1106  ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1107  ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1108  ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1109  merge_date(metadata);
1110 }
1111 
1113  const char *magic, ID3v2ExtraMeta **extra_meta)
1114 {
1115  id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1116 }
1117 
1118 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1119  ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1120 {
1121  id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1122 }
1123 
1125 {
1126  ID3v2ExtraMeta *current = *extra_meta, *next;
1127  const ID3v2EMFunc *extra_func;
1128 
1129  while (current) {
1130  if ((extra_func = get_extra_meta_func(current->tag, 1)))
1131  extra_func->free(current->data);
1132  next = current->next;
1133  av_freep(&current);
1134  current = next;
1135  }
1136 
1137  *extra_meta = NULL;
1138 }
1139 
1141 {
1142  ID3v2ExtraMeta *cur;
1143 
1144  for (cur = *extra_meta; cur; cur = cur->next) {
1145  ID3v2ExtraMetaAPIC *apic;
1146  AVStream *st;
1147 
1148  if (strcmp(cur->tag, "APIC"))
1149  continue;
1150  apic = cur->data;
1151 
1152  if (!(st = avformat_new_stream(s, NULL)))
1153  return AVERROR(ENOMEM);
1154 
1157  st->codecpar->codec_id = apic->id;
1158 
1159  if (AV_RB64(apic->buf->data) == 0x89504e470d0a1a0a)
1161 
1162  if (apic->description[0])
1163  av_dict_set(&st->metadata, "title", apic->description, 0);
1164 
1165  av_dict_set(&st->metadata, "comment", apic->type, 0);
1166 
1168  st->attached_pic.buf = apic->buf;
1169  st->attached_pic.data = apic->buf->data;
1171  st->attached_pic.stream_index = st->index;
1173 
1174  apic->buf = NULL;
1175  }
1176 
1177  return 0;
1178 }
1179 
1181 {
1182  int ret = 0;
1183  ID3v2ExtraMeta *cur;
1184  AVRational time_base = {1, 1000};
1185  ID3v2ExtraMetaCHAP **chapters = NULL;
1186  int num_chapters = 0;
1187  int i;
1188 
1189  // since extra_meta is a linked list where elements are prepended,
1190  // we need to reverse the order of chapters
1191  for (cur = *extra_meta; cur; cur = cur->next) {
1192  ID3v2ExtraMetaCHAP *chap;
1193 
1194  if (strcmp(cur->tag, "CHAP"))
1195  continue;
1196  chap = cur->data;
1197 
1198  if ((ret = av_dynarray_add_nofree(&chapters, &num_chapters, chap)) < 0)
1199  goto end;
1200  }
1201 
1202  for (i = 0; i < (num_chapters / 2); i++) {
1203  ID3v2ExtraMetaCHAP *right;
1204  int right_index;
1205 
1206  right_index = (num_chapters - 1) - i;
1207  right = chapters[right_index];
1208 
1209  chapters[right_index] = chapters[i];
1210  chapters[i] = right;
1211  }
1212 
1213  for (i = 0; i < num_chapters; i++) {
1214  ID3v2ExtraMetaCHAP *chap;
1215  AVChapter *chapter;
1216 
1217  chap = chapters[i];
1218  chapter = avpriv_new_chapter(s, i, time_base, chap->start, chap->end, chap->element_id);
1219  if (!chapter)
1220  continue;
1221 
1222  if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1223  goto end;
1224  }
1225 
1226 end:
1227  av_freep(&chapters);
1228  return ret;
1229 }
1230 
1232 {
1233  ID3v2ExtraMeta *cur;
1235 
1236  for (cur = *extra_meta; cur; cur = cur->next) {
1237  if (!strcmp(cur->tag, "PRIV")) {
1238  ID3v2ExtraMetaPRIV *priv = cur->data;
1239  AVBPrint bprint;
1240  char *escaped, *key;
1241  int i, ret;
1242 
1243  if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1244  return AVERROR(ENOMEM);
1245  }
1246 
1247  av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1248 
1249  for (i = 0; i < priv->datasize; i++) {
1250  if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1251  av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1252  } else {
1253  av_bprint_chars(&bprint, priv->data[i], 1);
1254  }
1255  }
1256 
1257  if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1258  av_free(key);
1259  return ret;
1260  }
1261 
1262  if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1263  av_free(key);
1264  av_free(escaped);
1265  return ret;
1266  }
1267  }
1268  }
1269 
1270  return 0;
1271 }
1272 
1274 {
1275  return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);
1276 }
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
void * data
Definition: id3v2.h:59
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:87
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 avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1366
static int is_number(const char *str)
Definition: id3v2.c:525
static AVDictionaryEntry * get_date_tag(AVDictionary *m, const char *tag)
Definition: id3v2.c:532
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define AV_DICT_DONT_OVERWRITE
Don't overwrite existing entries.
Definition: dict.h:79
static const ID3v2EMFunc id3v2_extra_meta_funcs[]
Definition: id3v2.c:792
static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, int len, uint8_t version, uint8_t flags, ID3v2ExtraMeta **extra_meta)
Definition: id3v2.c:819
const char * tag3
Definition: id3v2.c:784
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3862
uint8_t * element_id
Definition: id3v2.h:85
uint32_t datasize
Definition: id3v2.h:64
int index
stream index in AVFormatContext
Definition: avformat.h:873
int size
Definition: avcodec.h:1416
const char * b
Definition: vf_curves.c:113
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
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:588
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
static void free_apic(void *obj)
Definition: id3v2.c:573
const char ff_id3v2_4_tags[][4]
ID3v2.4-only text information frames.
Definition: id3v2.c:95
const char * key
int version
Definition: avisynth_c.h:766
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
#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:438
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:786
AVDictionary * metadata
Definition: avformat.h:1302
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:1140
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1337
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'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:4542
Format I/O context.
Definition: avformat.h:1341
char str[32]
Definition: internal.h:50
void(* read)(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:786
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:1066
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
const AVMetadataConv ff_id3v2_34_metadata_conv[]
Definition: id3v2.c:44
uint8_t
#define av_malloc(s)
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1180
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:801
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
int ff_id3v2_parse_priv_dict(AVDictionary **metadata, ID3v2ExtraMeta **extra_meta)
Parse PRIV tags into a dictionary.
Definition: id3v2.c:1231
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4415
static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:746
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
uint32_t end
Definition: id3v2.h:86
uint8_t * description
Definition: id3v2.h:67
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: avcodec.h:1415
const char * type
Definition: id3v2.h:73
static int flags
Definition: log.c:55
uint32_t tag
Definition: movenc.c:1449
enum AVCodecID id
Definition: internal.h:51
int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)
Add an element to a dynamic array.
Definition: mem.c:294
ptrdiff_t size
Definition: opengl_enc.c:101
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:648
uint8_t * data
Definition: id3v2.h:68
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1447
static int is_tag(const char *buf, unsigned int len)
Definition: id3v2.c:185
#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:410
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
#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:1579
#define AV_BPRINT_SIZE_UNLIMITED
const AVMetadataConv ff_id3v2_4_metadata_conv[]
Definition: id3v2.c:63
#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:738
#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
int ff_id3v2_parse_priv(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Add metadata for all PRIV tags in the ID3v2 header.
Definition: id3v2.c:1273
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3858
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1398
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1124
static void read_comment(AVFormatContext *s, AVIOContext *pb, int taglen, AVDictionary **metadata)
Parse a comment tag.
Definition: id3v2.c:406
uint8_t * data
Definition: id3v2.h:80
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
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:114
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1421
static unsigned int size_to_syncsafe(unsigned int size)
Definition: id3v2.c:175
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:639
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:488
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:130
unsigned int avio_rb24(AVIOContext *s)
Definition: aviobuf.c:794
#define AV_DICT_DONT_STRDUP_VAL
Take ownership of a value that'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:86
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
static void free_geobtag(void *obj)
Free GEOB type extra metadata.
Definition: id3v2.c:220
static unsigned int get_size(AVIOContext *s, int len)
Definition: id3v2.c:167
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:448
#define ID3v2_FLAG_UNSYNCH
Definition: id3v2.h:38
AVDictionary * metadata
Definition: avformat.h:936
uint8_t * owner
Definition: id3v2.h:79
static void error(const char *err)
#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:842
static void merge_date(AVDictionary **m)
Definition: id3v2.c:541
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1396
Stream structure.
Definition: avformat.h:872
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:87
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
struct ID3v2ExtraMeta * next
Definition: id3v2.h:60
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:1383
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
uint8_t * data
The data buffer.
Definition: buffer.h:89
#define ID3v2_FLAG_COMPRESSION
Definition: id3v2.h:40
enum AVCodecID id
Definition: id3v2.h:75
uint8_t * description
Definition: id3v2.h:74
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
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
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#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
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:203
static void rstrip_spaces(char *buf)
Definition: id3v2.c:581
static const ID3v2EMFunc * get_extra_meta_func(const char *tag, int isv34)
Get the corresponding ID3v2EMFunc struct for a tag.
Definition: id3v2.c:805
uint8_t * mime_type
Definition: id3v2.h:65
int ffio_ensure_seekback(AVIOContext *s, int64_t buf_size)
Ensures that the requested seekback buffer size will be available.
Definition: aviobuf.c:998
static void free_chapter(void *obj)
Definition: id3v2.c:674
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:754
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:87
int
int ff_id3v2_match(const uint8_t *buf, const char *magic)
Detect ID3v2 Header.
Definition: id3v2.c:142
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:81
const char * tag
Definition: id3v2.h:58
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:925
#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:33
const char * tag4
Definition: id3v2.c:785
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:1118
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:771
const char ff_id3v2_3_tags[][4]
ID3v2.3-only text information frames.
Definition: id3v2.c:101
uint8_t * file_name
Definition: id3v2.h:66
#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:1112
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:155
AVBufferRef * buf
Definition: id3v2.h:72
uint32_t datasize
Definition: id3v2.h:81
void(* free)(void *obj)
Definition: id3v2.c:789
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:690
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1019
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:106
int avio_get_str(AVIOContext *pb, int maxlen, char *buf, int buflen)
Read a string from pb into buf.
Definition: aviobuf.c:826
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:762
#define ID3v2_FLAG_DATALEN
Definition: id3v2.h:37
int stream_index
Definition: avcodec.h:1417
#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:682
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:954
GLuint buffer
Definition: opengl_enc.c:102
#define av_unused
Definition: attributes.h:125
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_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),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){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) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;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)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) 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);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=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){intplanes=out->planar?out->ch_count:1;unsignedm=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){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
static const AVMetadataConv id3v2_2_metadata_conv[]
Definition: id3v2.c:74
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