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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 "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 
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  av_free(geob);
229 }
230 
231 /**
232  * Decode characters to UTF-8 according to encoding type. The decoded buffer is
233  * always null terminated. Stop reading when either *maxread bytes are read from
234  * pb or U+0000 character is found.
235  *
236  * @param dst Pointer where the address of the buffer with the decoded bytes is
237  * stored. Buffer must be freed by caller.
238  * @param maxread Pointer to maximum number of characters to read from the
239  * AVIOContext. After execution the value is decremented by the number of bytes
240  * actually read.
241  * @returns 0 if no error occurred, dst is uninitialized on error
242  */
243 static int decode_str(AVFormatContext *s, AVIOContext *pb, int encoding,
244  uint8_t **dst, int *maxread)
245 {
246  int ret;
247  uint8_t tmp;
248  uint32_t ch = 1;
249  int left = *maxread;
250  unsigned int (*get)(AVIOContext*) = avio_rb16;
251  AVIOContext *dynbuf;
252 
253  if ((ret = avio_open_dyn_buf(&dynbuf)) < 0) {
254  av_log(s, AV_LOG_ERROR, "Error opening memory stream\n");
255  return ret;
256  }
257 
258  switch (encoding) {
260  while (left && ch) {
261  ch = avio_r8(pb);
262  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
263  left--;
264  }
265  break;
266 
268  if ((left -= 2) < 0) {
269  av_log(s, AV_LOG_ERROR, "Cannot read BOM value, input too short\n");
270  ffio_free_dyn_buf(&dynbuf);
271  *dst = NULL;
272  return AVERROR_INVALIDDATA;
273  }
274  switch (avio_rb16(pb)) {
275  case 0xfffe:
276  get = avio_rl16;
277  case 0xfeff:
278  break;
279  default:
280  av_log(s, AV_LOG_ERROR, "Incorrect BOM value\n");
281  ffio_free_dyn_buf(&dynbuf);
282  *dst = NULL;
283  *maxread = left;
284  return AVERROR_INVALIDDATA;
285  }
286  // fall-through
287 
289  while ((left > 1) && ch) {
290  GET_UTF16(ch, ((left -= 2) >= 0 ? get(pb) : 0), break;)
291  PUT_UTF8(ch, tmp, avio_w8(dynbuf, tmp);)
292  }
293  if (left < 0)
294  left += 2; /* did not read last char from pb */
295  break;
296 
297  case ID3v2_ENCODING_UTF8:
298  while (left && ch) {
299  ch = avio_r8(pb);
300  avio_w8(dynbuf, ch);
301  left--;
302  }
303  break;
304  default:
305  av_log(s, AV_LOG_WARNING, "Unknown encoding\n");
306  }
307 
308  if (ch)
309  avio_w8(dynbuf, 0);
310 
311  avio_close_dyn_buf(dynbuf, dst);
312  *maxread = left;
313 
314  return 0;
315 }
316 
317 /**
318  * Parse a text tag.
319  */
320 static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen,
321  AVDictionary **metadata, const char *key)
322 {
323  uint8_t *dst;
324  int encoding, dict_flags = AV_DICT_DONT_OVERWRITE | AV_DICT_DONT_STRDUP_VAL;
325  unsigned genre;
326 
327  if (taglen < 1)
328  return;
329 
330  encoding = avio_r8(pb);
331  taglen--; /* account for encoding type byte */
332 
333  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
334  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
335  return;
336  }
337 
338  if (!(strcmp(key, "TCON") && strcmp(key, "TCO")) &&
339  (sscanf(dst, "(%d)", &genre) == 1 || sscanf(dst, "%d", &genre) == 1) &&
340  genre <= ID3v1_GENRE_MAX) {
341  av_freep(&dst);
342  dst = av_strdup(ff_id3v1_genre_str[genre]);
343  } else if (!(strcmp(key, "TXXX") && strcmp(key, "TXX"))) {
344  /* dst now contains the key, need to get value */
345  key = dst;
346  if (decode_str(s, pb, encoding, &dst, &taglen) < 0) {
347  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", key);
348  av_freep(&key);
349  return;
350  }
351  dict_flags |= AV_DICT_DONT_STRDUP_KEY;
352  } else if (!*dst)
353  av_freep(&dst);
354 
355  if (dst)
356  av_dict_set(metadata, key, dst, dict_flags);
357 }
358 
359 static void read_uslt(AVFormatContext *s, AVIOContext *pb, int taglen,
360  AVDictionary **metadata)
361 {
362  uint8_t lang[4];
363  uint8_t *descriptor = NULL; // 'Content descriptor'
364  uint8_t *text = NULL;
365  char *key = NULL;
366  int encoding;
367  int ok = 0;
368 
369  if (taglen < 1)
370  goto error;
371 
372  encoding = avio_r8(pb);
373  taglen--;
374 
375  if (avio_read(pb, lang, 3) < 3)
376  goto error;
377  lang[3] = '\0';
378  taglen -= 3;
379 
380  if (decode_str(s, pb, encoding, &descriptor, &taglen) < 0)
381  goto error;
382 
383  if (decode_str(s, pb, encoding, &text, &taglen) < 0)
384  goto error;
385 
386  // FFmpeg does not support hierarchical metadata, so concatenate the keys.
387  key = av_asprintf("lyrics-%s%s%s", descriptor[0] ? (char *)descriptor : "",
388  descriptor[0] ? "-" : "",
389  lang);
390  if (!key)
391  goto error;
392 
393  av_dict_set(metadata, key, text, 0);
394 
395  ok = 1;
396 error:
397  if (!ok)
398  av_log(s, AV_LOG_ERROR, "Error reading lyrics, skipped\n");
399  av_free(descriptor);
400  av_free(text);
401  av_free(key);
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  geob_data = av_mallocz(sizeof(ID3v2ExtraMetaGEOB));
462  if (!geob_data) {
463  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
464  sizeof(ID3v2ExtraMetaGEOB));
465  return;
466  }
467 
468  new_extra = av_mallocz(sizeof(ID3v2ExtraMeta));
469  if (!new_extra) {
470  av_log(s, AV_LOG_ERROR, "Failed to alloc %"SIZE_SPECIFIER" bytes\n",
471  sizeof(ID3v2ExtraMeta));
472  goto fail;
473  }
474 
475  /* read encoding type byte */
476  encoding = avio_r8(pb);
477  taglen--;
478 
479  /* read MIME type (always ISO-8859) */
480  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &geob_data->mime_type,
481  &taglen) < 0 ||
482  taglen <= 0)
483  goto fail;
484 
485  /* read file name */
486  if (decode_str(s, pb, encoding, &geob_data->file_name, &taglen) < 0 ||
487  taglen <= 0)
488  goto fail;
489 
490  /* read content description */
491  if (decode_str(s, pb, encoding, &geob_data->description, &taglen) < 0 ||
492  taglen < 0)
493  goto fail;
494 
495  if (taglen) {
496  /* save encapsulated binary data */
497  geob_data->data = av_malloc(taglen);
498  if (!geob_data->data) {
499  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", taglen);
500  goto fail;
501  }
502  if ((len = avio_read(pb, geob_data->data, taglen)) < taglen)
504  "Error reading GEOB frame, data truncated.\n");
505  geob_data->datasize = len;
506  } else {
507  geob_data->data = NULL;
508  geob_data->datasize = 0;
509  }
510 
511  /* add data to the list */
512  new_extra->tag = "GEOB";
513  new_extra->data = geob_data;
514  new_extra->next = *extra_meta;
515  *extra_meta = new_extra;
516 
517  return;
518 
519 fail:
520  av_log(s, AV_LOG_ERROR, "Error reading frame %s, skipped\n", tag);
521  free_geobtag(geob_data);
522  av_free(new_extra);
523  return;
524 }
525 
526 static int is_number(const char *str)
527 {
528  while (*str >= '0' && *str <= '9')
529  str++;
530  return !*str;
531 }
532 
534 {
536  if ((t = av_dict_get(m, tag, NULL, AV_DICT_MATCH_CASE)) &&
537  strlen(t->value) == 4 && is_number(t->value))
538  return t;
539  return NULL;
540 }
541 
542 static void merge_date(AVDictionary **m)
543 {
545  char date[17] = { 0 }; // YYYY-MM-DD hh:mm
546 
547  if (!(t = get_date_tag(*m, "TYER")) &&
548  !(t = get_date_tag(*m, "TYE")))
549  return;
550  av_strlcpy(date, t->value, 5);
551  av_dict_set(m, "TYER", NULL, 0);
552  av_dict_set(m, "TYE", NULL, 0);
553 
554  if (!(t = get_date_tag(*m, "TDAT")) &&
555  !(t = get_date_tag(*m, "TDA")))
556  goto finish;
557  snprintf(date + 4, sizeof(date) - 4, "-%.2s-%.2s", t->value + 2, t->value);
558  av_dict_set(m, "TDAT", NULL, 0);
559  av_dict_set(m, "TDA", NULL, 0);
560 
561  if (!(t = get_date_tag(*m, "TIME")) &&
562  !(t = get_date_tag(*m, "TIM")))
563  goto finish;
564  snprintf(date + 10, sizeof(date) - 10,
565  " %.2s:%.2s", t->value, t->value + 2);
566  av_dict_set(m, "TIME", NULL, 0);
567  av_dict_set(m, "TIM", NULL, 0);
568 
569 finish:
570  if (date[0])
571  av_dict_set(m, "date", date, 0);
572 }
573 
574 static void free_apic(void *obj)
575 {
576  ID3v2ExtraMetaAPIC *apic = obj;
577  av_buffer_unref(&apic->buf);
578  av_freep(&apic->description);
579  av_freep(&apic);
580 }
581 
582 static void rstrip_spaces(char *buf)
583 {
584  size_t len = strlen(buf);
585  while (len > 0 && buf[len - 1] == ' ')
586  buf[--len] = 0;
587 }
588 
589 static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen,
590  const char *tag, ID3v2ExtraMeta **extra_meta,
591  int isv34)
592 {
593  int enc, pic_type;
594  char mimetype[64] = {0};
595  const CodecMime *mime = ff_id3v2_mime_tags;
596  enum AVCodecID id = AV_CODEC_ID_NONE;
597  ID3v2ExtraMetaAPIC *apic = NULL;
598  ID3v2ExtraMeta *new_extra = NULL;
599  int64_t end = avio_tell(pb) + taglen;
600 
601  if (taglen <= 4 || (!isv34 && taglen <= 6))
602  goto fail;
603 
604  new_extra = av_mallocz(sizeof(*new_extra));
605  apic = av_mallocz(sizeof(*apic));
606  if (!new_extra || !apic)
607  goto fail;
608 
609  enc = avio_r8(pb);
610  taglen--;
611 
612  /* mimetype */
613  if (isv34) {
614  taglen -= avio_get_str(pb, taglen, mimetype, sizeof(mimetype));
615  } else {
616  if (avio_read(pb, mimetype, 3) < 0)
617  goto fail;
618 
619  mimetype[3] = 0;
620  taglen -= 3;
621  }
622 
623  while (mime->id != AV_CODEC_ID_NONE) {
624  if (!av_strncasecmp(mime->str, mimetype, sizeof(mimetype))) {
625  id = mime->id;
626  break;
627  }
628  mime++;
629  }
630  if (id == AV_CODEC_ID_NONE) {
632  "Unknown attached picture mimetype: %s, skipping.\n", mimetype);
633  goto fail;
634  }
635  apic->id = id;
636 
637  /* picture type */
638  pic_type = avio_r8(pb);
639  taglen--;
640  if (pic_type < 0 || pic_type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types)) {
641  av_log(s, AV_LOG_WARNING, "Unknown attached picture type %d.\n",
642  pic_type);
643  pic_type = 0;
644  }
645  apic->type = ff_id3v2_picture_types[pic_type];
646 
647  /* description and picture data */
648  if (decode_str(s, pb, enc, &apic->description, &taglen) < 0) {
649  av_log(s, AV_LOG_ERROR,
650  "Error decoding attached picture description.\n");
651  goto fail;
652  }
653 
655  if (!apic->buf || !taglen || avio_read(pb, apic->buf->data, taglen) != taglen)
656  goto fail;
657  memset(apic->buf->data + taglen, 0, AV_INPUT_BUFFER_PADDING_SIZE);
658 
659  new_extra->tag = "APIC";
660  new_extra->data = apic;
661  new_extra->next = *extra_meta;
662  *extra_meta = new_extra;
663 
664  // The description must be unique, and some ID3v2 tag writers add spaces
665  // to write several APIC entries with the same description.
666  rstrip_spaces(apic->description);
667 
668  return;
669 
670 fail:
671  if (apic)
672  free_apic(apic);
673  av_freep(&new_extra);
674  avio_seek(pb, end, SEEK_SET);
675 }
676 
677 static void free_chapter(void *obj)
678 {
679  ID3v2ExtraMetaCHAP *chap = obj;
680  av_freep(&chap->element_id);
681  av_dict_free(&chap->meta);
682  av_freep(&chap);
683 }
684 
685 static void read_chapter(AVFormatContext *s, AVIOContext *pb, int len, const char *ttag, ID3v2ExtraMeta **extra_meta, int isv34)
686 {
687  int taglen;
688  char tag[5];
689  ID3v2ExtraMeta *new_extra = NULL;
690  ID3v2ExtraMetaCHAP *chap = NULL;
691 
692  new_extra = av_mallocz(sizeof(*new_extra));
693  chap = av_mallocz(sizeof(*chap));
694 
695  if (!new_extra || !chap)
696  goto fail;
697 
698  if (decode_str(s, pb, 0, &chap->element_id, &len) < 0)
699  goto fail;
700 
701  if (len < 16)
702  goto fail;
703 
704  chap->start = avio_rb32(pb);
705  chap->end = avio_rb32(pb);
706  avio_skip(pb, 8);
707 
708  len -= 16;
709  while (len > 10) {
710  if (avio_read(pb, tag, 4) < 4)
711  goto fail;
712  tag[4] = 0;
713  taglen = avio_rb32(pb);
714  avio_skip(pb, 2);
715  len -= 10;
716  if (taglen < 0 || taglen > len)
717  goto fail;
718  if (tag[0] == 'T')
719  read_ttag(s, pb, taglen, &chap->meta, tag);
720  else
721  avio_skip(pb, taglen);
722  len -= taglen;
723  }
724 
725  ff_metadata_conv(&chap->meta, NULL, ff_id3v2_34_metadata_conv);
726  ff_metadata_conv(&chap->meta, NULL, ff_id3v2_4_metadata_conv);
727 
728  new_extra->tag = "CHAP";
729  new_extra->data = chap;
730  new_extra->next = *extra_meta;
731  *extra_meta = new_extra;
732 
733  return;
734 
735 fail:
736  if (chap)
737  free_chapter(chap);
738  av_freep(&new_extra);
739 }
740 
741 static void free_priv(void *obj)
742 {
743  ID3v2ExtraMetaPRIV *priv = obj;
744  av_freep(&priv->owner);
745  av_freep(&priv->data);
746  av_freep(&priv);
747 }
748 
749 static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen,
750  const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
751 {
752  ID3v2ExtraMeta *meta;
753  ID3v2ExtraMetaPRIV *priv;
754 
755  meta = av_mallocz(sizeof(*meta));
756  priv = av_mallocz(sizeof(*priv));
757 
758  if (!meta || !priv)
759  goto fail;
760 
761  if (decode_str(s, pb, ID3v2_ENCODING_ISO8859, &priv->owner, &taglen) < 0)
762  goto fail;
763 
764  priv->data = av_malloc(taglen);
765  if (!priv->data)
766  goto fail;
767 
768  priv->datasize = taglen;
769 
770  if (avio_read(pb, priv->data, priv->datasize) != priv->datasize)
771  goto fail;
772 
773  meta->tag = "PRIV";
774  meta->data = priv;
775  meta->next = *extra_meta;
776  *extra_meta = meta;
777 
778  return;
779 
780 fail:
781  if (priv)
782  free_priv(priv);
783  av_freep(&meta);
784 }
785 
786 typedef struct ID3v2EMFunc {
787  const char *tag3;
788  const char *tag4;
789  void (*read)(AVFormatContext *s, AVIOContext *pb, int taglen,
790  const char *tag, ID3v2ExtraMeta **extra_meta,
791  int isv34);
792  void (*free)(void *obj);
793 } ID3v2EMFunc;
794 
796  { "GEO", "GEOB", read_geobtag, free_geobtag },
797  { "PIC", "APIC", read_apic, free_apic },
798  { "CHAP","CHAP", read_chapter, free_chapter },
799  { "PRIV","PRIV", read_priv, free_priv },
800  { NULL }
801 };
802 
803 /**
804  * Get the corresponding ID3v2EMFunc struct for a tag.
805  * @param isv34 Determines if v2.2 or v2.3/4 strings are used
806  * @return A pointer to the ID3v2EMFunc struct if found, NULL otherwise.
807  */
808 static const ID3v2EMFunc *get_extra_meta_func(const char *tag, int isv34)
809 {
810  int i = 0;
811  while (id3v2_extra_meta_funcs[i].tag3) {
812  if (tag && !memcmp(tag,
813  (isv34 ? id3v2_extra_meta_funcs[i].tag4 :
814  id3v2_extra_meta_funcs[i].tag3),
815  (isv34 ? 4 : 3)))
816  return &id3v2_extra_meta_funcs[i];
817  i++;
818  }
819  return NULL;
820 }
821 
822 static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata,
824  uint8_t flags, ID3v2ExtraMeta **extra_meta)
825 {
826  int isv34, unsync;
827  unsigned tlen;
828  char tag[5];
829  int64_t next, end = avio_tell(pb) + len;
830  int taghdrlen;
831  const char *reason = NULL;
832  AVIOContext pb_local;
833  AVIOContext *pbx;
834  unsigned char *buffer = NULL;
835  int buffer_size = 0;
836  const ID3v2EMFunc *extra_func = NULL;
837  unsigned char *uncompressed_buffer = NULL;
838  av_unused int uncompressed_buffer_size = 0;
839  const char *comm_frame;
840 
841  av_log(s, AV_LOG_DEBUG, "id3v2 ver:%d flags:%02X len:%d\n", version, flags, len);
842 
843  switch (version) {
844  case 2:
845  if (flags & 0x40) {
846  reason = "compression";
847  goto error;
848  }
849  isv34 = 0;
850  taghdrlen = 6;
851  comm_frame = "COM";
852  break;
853 
854  case 3:
855  case 4:
856  isv34 = 1;
857  taghdrlen = 10;
858  comm_frame = "COMM";
859  break;
860 
861  default:
862  reason = "version";
863  goto error;
864  }
865 
866  unsync = flags & 0x80;
867 
868  if (isv34 && flags & 0x40) { /* Extended header present, just skip over it */
869  int extlen = get_size(pb, 4);
870  if (version == 4)
871  /* In v2.4 the length includes the length field we just read. */
872  extlen -= 4;
873 
874  if (extlen < 0) {
875  reason = "invalid extended header length";
876  goto error;
877  }
878  avio_skip(pb, extlen);
879  len -= extlen + 4;
880  if (len < 0) {
881  reason = "extended header too long.";
882  goto error;
883  }
884  }
885 
886  while (len >= taghdrlen) {
887  unsigned int tflags = 0;
888  int tunsync = 0;
889  int tcomp = 0;
890  int tencr = 0;
891  unsigned long av_unused dlen;
892 
893  if (isv34) {
894  if (avio_read(pb, tag, 4) < 4)
895  break;
896  tag[4] = 0;
897  if (version == 3) {
898  tlen = avio_rb32(pb);
899  } else {
900  /* some encoders incorrectly uses v3 sizes instead of syncsafe ones
901  * so check the next tag to see which one to use */
902  tlen = avio_rb32(pb);
903  if (tlen > 0x7f) {
904  if (tlen < len) {
905  int64_t cur = avio_tell(pb);
906 
907  if (ffio_ensure_seekback(pb, 2 /* tflags */ + tlen + 4 /* next tag */))
908  break;
909 
910  if (check_tag(pb, cur + 2 + size_to_syncsafe(tlen), 4) == 1)
911  tlen = size_to_syncsafe(tlen);
912  else if (check_tag(pb, cur + 2 + tlen, 4) != 1)
913  break;
914  avio_seek(pb, cur, SEEK_SET);
915  } else
916  tlen = size_to_syncsafe(tlen);
917  }
918  }
919  tflags = avio_rb16(pb);
920  tunsync = tflags & ID3v2_FLAG_UNSYNCH;
921  } else {
922  if (avio_read(pb, tag, 3) < 3)
923  break;
924  tag[3] = 0;
925  tlen = avio_rb24(pb);
926  }
927  if (tlen > (1<<28))
928  break;
929  len -= taghdrlen + tlen;
930 
931  if (len < 0)
932  break;
933 
934  next = avio_tell(pb) + tlen;
935 
936  if (!tlen) {
937  if (tag[0])
938  av_log(s, AV_LOG_DEBUG, "Invalid empty frame %s, skipping.\n",
939  tag);
940  continue;
941  }
942 
943  if (tflags & ID3v2_FLAG_DATALEN) {
944  if (tlen < 4)
945  break;
946  dlen = avio_rb32(pb);
947  tlen -= 4;
948  } else
949  dlen = tlen;
950 
951  tcomp = tflags & ID3v2_FLAG_COMPRESSION;
952  tencr = tflags & ID3v2_FLAG_ENCRYPTION;
953 
954  /* skip encrypted tags and, if no zlib, compressed tags */
955  if (tencr || (!CONFIG_ZLIB && tcomp)) {
956  const char *type;
957  if (!tcomp)
958  type = "encrypted";
959  else if (!tencr)
960  type = "compressed";
961  else
962  type = "encrypted and compressed";
963 
964  av_log(s, AV_LOG_WARNING, "Skipping %s ID3v2 frame %s.\n", type, tag);
965  avio_skip(pb, tlen);
966  /* check for text tag or supported special meta tag */
967  } else if (tag[0] == 'T' ||
968  !memcmp(tag, "USLT", 4) ||
969  !strcmp(tag, comm_frame) ||
970  (extra_meta &&
971  (extra_func = get_extra_meta_func(tag, isv34)))) {
972  pbx = pb;
973 
974  if (unsync || tunsync || tcomp) {
975  av_fast_malloc(&buffer, &buffer_size, tlen);
976  if (!buffer) {
977  av_log(s, AV_LOG_ERROR, "Failed to alloc %d bytes\n", tlen);
978  goto seek;
979  }
980  }
981  if (unsync || tunsync) {
982  uint8_t *b = buffer;
983  uint8_t *t = buffer;
984  uint8_t *end = t + tlen;
985 
986  if (avio_read(pb, buffer, tlen) != tlen) {
987  av_log(s, AV_LOG_ERROR, "Failed to read tag data\n");
988  goto seek;
989  }
990 
991  while (t != end) {
992  *b++ = *t++;
993  if (t != end && t[-1] == 0xff && !t[0])
994  t++;
995  }
996 
997  ffio_init_context(&pb_local, buffer, b - buffer, 0, NULL, NULL, NULL,
998  NULL);
999  tlen = b - buffer;
1000  pbx = &pb_local; // read from sync buffer
1001  }
1002 
1003 #if CONFIG_ZLIB
1004  if (tcomp) {
1005  int err;
1006 
1007  av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen);
1008 
1009  av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen);
1010  if (!uncompressed_buffer) {
1011  av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen);
1012  goto seek;
1013  }
1014 
1015  if (!(unsync || tunsync)) {
1016  err = avio_read(pb, buffer, tlen);
1017  if (err < 0) {
1018  av_log(s, AV_LOG_ERROR, "Failed to read compressed tag\n");
1019  goto seek;
1020  }
1021  tlen = err;
1022  }
1023 
1024  err = uncompress(uncompressed_buffer, &dlen, buffer, tlen);
1025  if (err != Z_OK) {
1026  av_log(s, AV_LOG_ERROR, "Failed to uncompress tag: %d\n", err);
1027  goto seek;
1028  }
1029  ffio_init_context(&pb_local, uncompressed_buffer, dlen, 0, NULL, NULL, NULL, NULL);
1030  tlen = dlen;
1031  pbx = &pb_local; // read from sync buffer
1032  }
1033 #endif
1034  if (tag[0] == 'T')
1035  /* parse text tag */
1036  read_ttag(s, pbx, tlen, metadata, tag);
1037  else if (!memcmp(tag, "USLT", 4))
1038  read_uslt(s, pbx, tlen, metadata);
1039  else if (!strcmp(tag, comm_frame))
1040  read_comment(s, pbx, tlen, metadata);
1041  else
1042  /* parse special meta tag */
1043  extra_func->read(s, pbx, tlen, tag, extra_meta, isv34);
1044  } else if (!tag[0]) {
1045  if (tag[1])
1046  av_log(s, AV_LOG_WARNING, "invalid frame id, assuming padding\n");
1047  avio_skip(pb, tlen);
1048  break;
1049  }
1050  /* Skip to end of tag */
1051 seek:
1052  avio_seek(pb, next, SEEK_SET);
1053  }
1054 
1055  /* Footer preset, always 10 bytes, skip over it */
1056  if (version == 4 && flags & 0x10)
1057  end += 10;
1058 
1059 error:
1060  if (reason)
1061  av_log(s, AV_LOG_INFO, "ID3v2.%d tag skipped, cannot handle %s\n",
1062  version, reason);
1063  avio_seek(pb, end, SEEK_SET);
1064  av_free(buffer);
1065  av_free(uncompressed_buffer);
1066  return;
1067 }
1068 
1069 static void id3v2_read_internal(AVIOContext *pb, AVDictionary **metadata,
1070  AVFormatContext *s, const char *magic,
1071  ID3v2ExtraMeta **extra_meta, int64_t max_search_size)
1072 {
1073  int len, ret;
1075  int found_header;
1076  int64_t start, off;
1077 
1078  if (max_search_size && max_search_size < ID3v2_HEADER_SIZE)
1079  return;
1080 
1081  start = avio_tell(pb);
1082  do {
1083  /* save the current offset in case there's nothing to read/skip */
1084  off = avio_tell(pb);
1085  if (max_search_size && off - start >= max_search_size - ID3v2_HEADER_SIZE) {
1086  avio_seek(pb, off, SEEK_SET);
1087  break;
1088  }
1089 
1091  if (ret >= 0)
1092  ret = avio_read(pb, buf, ID3v2_HEADER_SIZE);
1093  if (ret != ID3v2_HEADER_SIZE) {
1094  avio_seek(pb, off, SEEK_SET);
1095  break;
1096  }
1097  found_header = ff_id3v2_match(buf, magic);
1098  if (found_header) {
1099  /* parse ID3v2 header */
1100  len = ((buf[6] & 0x7f) << 21) |
1101  ((buf[7] & 0x7f) << 14) |
1102  ((buf[8] & 0x7f) << 7) |
1103  (buf[9] & 0x7f);
1104  id3v2_parse(pb, metadata, s, len, buf[3], buf[5], extra_meta);
1105  } else {
1106  avio_seek(pb, off, SEEK_SET);
1107  }
1108  } while (found_header);
1109  ff_metadata_conv(metadata, NULL, ff_id3v2_34_metadata_conv);
1110  ff_metadata_conv(metadata, NULL, id3v2_2_metadata_conv);
1111  ff_metadata_conv(metadata, NULL, ff_id3v2_4_metadata_conv);
1112  merge_date(metadata);
1113 }
1114 
1116  const char *magic, ID3v2ExtraMeta **extra_meta)
1117 {
1118  id3v2_read_internal(pb, metadata, NULL, magic, extra_meta, 0);
1119 }
1120 
1121 void ff_id3v2_read(AVFormatContext *s, const char *magic,
1122  ID3v2ExtraMeta **extra_meta, unsigned int max_search_size)
1123 {
1124  id3v2_read_internal(s->pb, &s->metadata, s, magic, extra_meta, max_search_size);
1125 }
1126 
1128 {
1129  ID3v2ExtraMeta *current = *extra_meta, *next;
1130  const ID3v2EMFunc *extra_func;
1131 
1132  while (current) {
1133  if ((extra_func = get_extra_meta_func(current->tag, 1)))
1134  extra_func->free(current->data);
1135  next = current->next;
1136  av_freep(&current);
1137  current = next;
1138  }
1139 
1140  *extra_meta = NULL;
1141 }
1142 
1144 {
1145  ID3v2ExtraMeta *cur;
1146 
1147  for (cur = *extra_meta; cur; cur = cur->next) {
1148  ID3v2ExtraMetaAPIC *apic;
1149  AVStream *st;
1150 
1151  if (strcmp(cur->tag, "APIC"))
1152  continue;
1153  apic = cur->data;
1154 
1155  if (!(st = avformat_new_stream(s, NULL)))
1156  return AVERROR(ENOMEM);
1157 
1160  st->codecpar->codec_id = apic->id;
1161 
1162  if (AV_RB64(apic->buf->data) == PNGSIG)
1164 
1165  if (apic->description[0])
1166  av_dict_set(&st->metadata, "title", apic->description, 0);
1167 
1168  av_dict_set(&st->metadata, "comment", apic->type, 0);
1169 
1171  st->attached_pic.buf = apic->buf;
1172  st->attached_pic.data = apic->buf->data;
1174  st->attached_pic.stream_index = st->index;
1176 
1177  apic->buf = NULL;
1178  }
1179 
1180  return 0;
1181 }
1182 
1184 {
1185  int ret = 0;
1186  ID3v2ExtraMeta *cur;
1187  AVRational time_base = {1, 1000};
1188  ID3v2ExtraMetaCHAP **chapters = NULL;
1189  int num_chapters = 0;
1190  int i;
1191 
1192  // since extra_meta is a linked list where elements are prepended,
1193  // we need to reverse the order of chapters
1194  for (cur = *extra_meta; cur; cur = cur->next) {
1195  ID3v2ExtraMetaCHAP *chap;
1196 
1197  if (strcmp(cur->tag, "CHAP"))
1198  continue;
1199  chap = cur->data;
1200 
1201  if ((ret = av_dynarray_add_nofree(&chapters, &num_chapters, chap)) < 0)
1202  goto end;
1203  }
1204 
1205  for (i = 0; i < (num_chapters / 2); i++) {
1206  ID3v2ExtraMetaCHAP *right;
1207  int right_index;
1208 
1209  right_index = (num_chapters - 1) - i;
1210  right = chapters[right_index];
1211 
1212  chapters[right_index] = chapters[i];
1213  chapters[i] = right;
1214  }
1215 
1216  for (i = 0; i < num_chapters; i++) {
1217  ID3v2ExtraMetaCHAP *chap;
1218  AVChapter *chapter;
1219 
1220  chap = chapters[i];
1221  chapter = avpriv_new_chapter(s, i, time_base, chap->start, chap->end, chap->element_id);
1222  if (!chapter)
1223  continue;
1224 
1225  if ((ret = av_dict_copy(&chapter->metadata, chap->meta, 0)) < 0)
1226  goto end;
1227  }
1228 
1229 end:
1230  av_freep(&chapters);
1231  return ret;
1232 }
1233 
1235 {
1236  ID3v2ExtraMeta *cur;
1238 
1239  for (cur = *extra_meta; cur; cur = cur->next) {
1240  if (!strcmp(cur->tag, "PRIV")) {
1241  ID3v2ExtraMetaPRIV *priv = cur->data;
1242  AVBPrint bprint;
1243  char *escaped, *key;
1244  int i, ret;
1245 
1246  if ((key = av_asprintf(ID3v2_PRIV_METADATA_PREFIX "%s", priv->owner)) == NULL) {
1247  return AVERROR(ENOMEM);
1248  }
1249 
1250  av_bprint_init(&bprint, priv->datasize + 1, AV_BPRINT_SIZE_UNLIMITED);
1251 
1252  for (i = 0; i < priv->datasize; i++) {
1253  if (priv->data[i] < 32 || priv->data[i] > 126 || priv->data[i] == '\\') {
1254  av_bprintf(&bprint, "\\x%02x", priv->data[i]);
1255  } else {
1256  av_bprint_chars(&bprint, priv->data[i], 1);
1257  }
1258  }
1259 
1260  if ((ret = av_bprint_finalize(&bprint, &escaped)) < 0) {
1261  av_free(key);
1262  return ret;
1263  }
1264 
1265  if ((ret = av_dict_set(metadata, key, escaped, dict_flags)) < 0) {
1266  av_free(key);
1267  av_free(escaped);
1268  return ret;
1269  }
1270  }
1271  }
1272 
1273  return 0;
1274 }
1275 
1277 {
1278  return ff_id3v2_parse_priv_dict(&s->metadata, extra_meta);
1279 }
#define NULL
Definition: coverity.c:32
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:1420
static int is_number(const char *str)
Definition: id3v2.c:526
static AVDictionaryEntry * get_date_tag(AVDictionary *m, const char *tag)
Definition: id3v2.c:533
#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:795
static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata, AVFormatContext *s, int len, uint8_t version, uint8_t flags, ID3v2ExtraMeta **extra_meta)
Definition: id3v2.c:822
const char * tag3
Definition: id3v2.c:787
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3917
uint8_t * element_id
Definition: id3v2.h:85
uint32_t datasize
Definition: id3v2.h:64
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1453
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: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:589
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:574
const char ff_id3v2_4_tags[][4]
ID3v2.4-only text information frames.
Definition: id3v2.c:96
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:1312
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:1143
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1391
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:243
#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:4583
Format I/O context.
Definition: avformat.h:1351
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:789
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:1069
#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)
int ff_id3v2_parse_chapters(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
Create chapters for all CHAP tags found in the ID3v2 header.
Definition: id3v2.c:1183
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:1234
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4455
static void read_priv(AVFormatContext *s, AVIOContext *pb, int taglen, const char *tag, ID3v2ExtraMeta **extra_meta, int isv34)
Definition: id3v2.c:749
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:1452
const char * type
Definition: id3v2.h:73
uint32_t tag
Definition: movenc.c:1486
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:1484
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: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: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:741
#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:1276
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3913
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1435
void ff_id3v2_free_extra_meta(ID3v2ExtraMeta **extra_meta)
Free memory allocated parsing special (non-text) metadata.
Definition: id3v2.c:1127
#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
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:117
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1458
static unsigned int size_to_syncsafe(unsigned int size)
Definition: id3v2.c:176
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:131
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:320
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: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:938
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:542
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1450
Stream structure.
Definition: avformat.h:874
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: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:1393
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:359
#define SIZE_SPECIFIER
Definition: internal.h:262
#define flags(name, subs,...)
Definition: cbs_av1.c:584
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:582
static const ID3v2EMFunc * get_extra_meta_func(const char *tag, int isv34)
Get the corresponding ID3v2EMFunc struct for a tag.
Definition: id3v2.c:808
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:1052
static void free_chapter(void *obj)
Definition: id3v2.c:677
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: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:81
const char * tag
Definition: id3v2.h:58
int disposition
AV_DISPOSITION_* bit field.
Definition: avformat.h:927
#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:788
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:1121
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:782
const char ff_id3v2_3_tags[][4]
ID3v2.3-only text information frames.
Definition: id3v2.c:102
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:1115
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:72
uint32_t datasize
Definition: id3v2.h:81
void(* free)(void *obj)
Definition: id3v2.c:792
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:690
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
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:880
unsigned int avio_rl24(AVIOContext *s)
Definition: aviobuf.c:762
#define ID3v2_FLAG_DATALEN
Definition: id3v2.h:37
int stream_index
Definition: avcodec.h:1454
#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:685
AVPacket attached_pic
For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached pictu...
Definition: avformat.h:956
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: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