FFmpeg  4.3.8
id3v2enc.c
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1 /*
2  * ID3v2 header writer
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 #include <stdint.h>
22 #include <string.h>
23 
24 #include "libavutil/avstring.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/intreadwrite.h"
27 #include "avformat.h"
28 #include "avio.h"
29 #include "avio_internal.h"
30 #include "id3v2.h"
31 
32 static void id3v2_put_size(AVIOContext *pb, int size)
33 {
34  avio_w8(pb, size >> 21 & 0x7f);
35  avio_w8(pb, size >> 14 & 0x7f);
36  avio_w8(pb, size >> 7 & 0x7f);
37  avio_w8(pb, size & 0x7f);
38 }
39 
40 static int string_is_ascii(const uint8_t *str)
41 {
42  while (*str && *str < 128) str++;
43  return !*str;
44 }
45 
46 static void id3v2_encode_string(AVIOContext *pb, const uint8_t *str,
47  enum ID3v2Encoding enc)
48 {
49  int (*put)(AVIOContext*, const char*);
50 
51  if (enc == ID3v2_ENCODING_UTF16BOM) {
52  avio_wl16(pb, 0xFEFF); /* BOM */
53  put = avio_put_str16le;
54  } else
55  put = avio_put_str;
56 
57  put(pb, str);
58 }
59 
60 /**
61  * Write a text frame with one (normal frames) or two (TXXX frames) strings
62  * according to encoding (only UTF-8 or UTF-16+BOM supported).
63  * @return number of bytes written or a negative error code.
64  */
65 static int id3v2_put_ttag(ID3v2EncContext *id3, AVIOContext *avioc, const char *str1, const char *str2,
66  uint32_t tag, enum ID3v2Encoding enc)
67 {
68  int len, ret;
69  uint8_t *pb;
70  AVIOContext *dyn_buf;
71  if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
72  return ret;
73 
74  /* check if the strings are ASCII-only and use UTF16 only if
75  * they're not */
76  if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(str1) &&
77  (!str2 || string_is_ascii(str2)))
79 
80  avio_w8(dyn_buf, enc);
81  id3v2_encode_string(dyn_buf, str1, enc);
82  if (str2)
83  id3v2_encode_string(dyn_buf, str2, enc);
84  len = avio_get_dyn_buf(dyn_buf, &pb);
85 
86  avio_wb32(avioc, tag);
87  /* ID3v2.3 frame size is not sync-safe */
88  if (id3->version == 3)
89  avio_wb32(avioc, len);
90  else
91  id3v2_put_size(avioc, len);
92  avio_wb16(avioc, 0);
93  avio_write(avioc, pb, len);
94 
95  ffio_free_dyn_buf(&dyn_buf);
96  return len + ID3v2_HEADER_SIZE;
97 }
98 
99 /**
100  * Write a priv frame with owner and data. 'key' is the owner prepended with
101  * ID3v2_PRIV_METADATA_PREFIX. 'data' is provided as a string. Any \xXX
102  * (where 'X' is a valid hex digit) will be unescaped to the byte value.
103  */
104 static int id3v2_put_priv(ID3v2EncContext *id3, AVIOContext *avioc, const char *key, const char *data)
105 {
106  int len, ret;
107  uint8_t *pb;
108  AVIOContext *dyn_buf;
109 
110  if (!av_strstart(key, ID3v2_PRIV_METADATA_PREFIX, &key)) {
111  return 0;
112  }
113 
114  if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
115  return ret;
116 
117  // owner + null byte.
118  avio_write(dyn_buf, key, strlen(key) + 1);
119 
120  while (*data) {
121  if (av_strstart(data, "\\x", &data)) {
122  if (data[0] && data[1] && av_isxdigit(data[0]) && av_isxdigit(data[1])) {
123  char digits[] = {data[0], data[1], 0};
124  avio_w8(dyn_buf, strtol(digits, NULL, 16));
125  data += 2;
126  } else {
127  ffio_free_dyn_buf(&dyn_buf);
128  av_log(avioc, AV_LOG_ERROR, "Invalid escape '\\x%.2s' in metadata tag '"
129  ID3v2_PRIV_METADATA_PREFIX "%s'.\n", data, key);
130  return AVERROR(EINVAL);
131  }
132  } else {
133  avio_write(dyn_buf, data++, 1);
134  }
135  }
136 
137  len = avio_get_dyn_buf(dyn_buf, &pb);
138 
139  avio_wb32(avioc, MKBETAG('P', 'R', 'I', 'V'));
140  if (id3->version == 3)
141  avio_wb32(avioc, len);
142  else
143  id3v2_put_size(avioc, len);
144  avio_wb16(avioc, 0);
145  avio_write(avioc, pb, len);
146 
147  ffio_free_dyn_buf(&dyn_buf);
148 
149  return len + ID3v2_HEADER_SIZE;
150 }
151 
153  const char table[][4], enum ID3v2Encoding enc)
154 {
155  uint32_t tag;
156  int i;
157 
158  if (t->key[0] != 'T' || strlen(t->key) != 4)
159  return -1;
160  tag = AV_RB32(t->key);
161  for (i = 0; *table[i]; i++)
162  if (tag == AV_RB32(table[i]))
163  return id3v2_put_ttag(id3, pb, t->value, NULL, tag, enc);
164  return -1;
165 }
166 
168 {
169  AVDictionaryEntry *mtag = NULL;
170  AVDictionary *dst = NULL;
171  const char *key, *value;
172  char year[5] = {0}, day_month[5] = {0};
173  int i;
174 
175  while ((mtag = av_dict_get(*pm, "", mtag, AV_DICT_IGNORE_SUFFIX))) {
176  key = mtag->key;
177  if (!av_strcasecmp(key, "date")) {
178  /* split date tag using "YYYY-MM-DD" format into year and month/day segments */
179  value = mtag->value;
180  i = 0;
181  while (value[i] >= '0' && value[i] <= '9') i++;
182  if (value[i] == '\0' || value[i] == '-') {
183  av_strlcpy(year, value, sizeof(year));
184  av_dict_set(&dst, "TYER", year, 0);
185 
186  if (value[i] == '-' &&
187  value[i+1] >= '0' && value[i+1] <= '1' &&
188  value[i+2] >= '0' && value[i+2] <= '9' &&
189  value[i+3] == '-' &&
190  value[i+4] >= '0' && value[i+4] <= '3' &&
191  value[i+5] >= '0' && value[i+5] <= '9' &&
192  (value[i+6] == '\0' || value[i+6] == ' ')) {
193  snprintf(day_month, sizeof(day_month), "%.2s%.2s", value + i + 4, value + i + 1);
194  av_dict_set(&dst, "TDAT", day_month, 0);
195  }
196  } else
197  av_dict_set(&dst, key, value, 0);
198  } else
199  av_dict_set(&dst, key, mtag->value, 0);
200  }
201  av_dict_free(pm);
202  *pm = dst;
203 }
204 
205 void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version,
206  const char *magic)
207 {
208  id3->version = id3v2_version;
209 
210  avio_wb32(pb, MKBETAG(magic[0], magic[1], magic[2], id3v2_version));
211  avio_w8(pb, 0);
212  avio_w8(pb, 0); /* flags */
213 
214  /* reserve space for size */
215  id3->size_pos = avio_tell(pb);
216  avio_wb32(pb, 0);
217 }
218 
219 static int write_metadata(AVIOContext *pb, AVDictionary **metadata,
220  ID3v2EncContext *id3, int enc)
221 {
222  AVDictionaryEntry *t = NULL;
223  int ret;
224 
226  if (id3->version == 3)
227  id3v2_3_metadata_split_date(metadata);
228  else if (id3->version == 4)
230 
231  while ((t = av_dict_get(*metadata, "", t, AV_DICT_IGNORE_SUFFIX))) {
232  if ((ret = id3v2_check_write_tag(id3, pb, t, ff_id3v2_tags, enc)) > 0) {
233  id3->len += ret;
234  continue;
235  }
236  if ((ret = id3v2_check_write_tag(id3, pb, t, id3->version == 3 ?
237  ff_id3v2_3_tags : ff_id3v2_4_tags, enc)) > 0) {
238  id3->len += ret;
239  continue;
240  }
241 
242  if ((ret = id3v2_put_priv(id3, pb, t->key, t->value)) > 0) {
243  id3->len += ret;
244  continue;
245  } else if (ret < 0) {
246  return ret;
247  }
248 
249  /* unknown tag, write as TXXX frame */
250  if ((ret = id3v2_put_ttag(id3, pb, t->key, t->value, MKBETAG('T', 'X', 'X', 'X'), enc)) < 0)
251  return ret;
252  id3->len += ret;
253  }
254 
255  return 0;
256 }
257 
258 static int write_ctoc(AVFormatContext *s, ID3v2EncContext *id3, int enc)
259 {
260  uint8_t *dyn_buf;
261  AVIOContext *dyn_bc;
262  char name[123];
263  int len, ret;
264 
265  if (s->nb_chapters == 0)
266  return 0;
267 
268  if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0)
269  return ret;
270 
271  avio_put_str(dyn_bc, "toc");
272  avio_w8(dyn_bc, 0x03);
273  avio_w8(dyn_bc, s->nb_chapters);
274  for (int i = 0; i < s->nb_chapters; i++) {
275  snprintf(name, 122, "ch%d", i);
276  avio_put_str(dyn_bc, name);
277  }
278  len = avio_get_dyn_buf(dyn_bc, &dyn_buf);
279  id3->len += len + ID3v2_HEADER_SIZE;
280 
281  avio_wb32(s->pb, MKBETAG('C', 'T', 'O', 'C'));
282  avio_wb32(s->pb, len);
283  avio_wb16(s->pb, 0);
284  avio_write(s->pb, dyn_buf, len);
285 
286  ffio_free_dyn_buf(&dyn_bc);
287 
288  return ret;
289 }
290 
291 static int write_chapter(AVFormatContext *s, ID3v2EncContext *id3, int id, int enc)
292 {
293  const AVRational time_base = {1, 1000};
294  AVChapter *ch = s->chapters[id];
295  uint8_t *dyn_buf;
296  AVIOContext *dyn_bc;
297  char name[123];
298  int len, start, end, ret;
299 
300  if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0)
301  return ret;
302 
303  start = av_rescale_q(ch->start, ch->time_base, time_base);
304  end = av_rescale_q(ch->end, ch->time_base, time_base);
305 
306  snprintf(name, 122, "ch%d", id);
307  id3->len += avio_put_str(dyn_bc, name);
308  avio_wb32(dyn_bc, start);
309  avio_wb32(dyn_bc, end);
310  avio_wb32(dyn_bc, 0xFFFFFFFFu);
311  avio_wb32(dyn_bc, 0xFFFFFFFFu);
312 
313  if ((ret = write_metadata(dyn_bc, &ch->metadata, id3, enc)) < 0)
314  goto fail;
315 
316  len = avio_get_dyn_buf(dyn_bc, &dyn_buf);
317  id3->len += 16 + ID3v2_HEADER_SIZE;
318 
319  avio_wb32(s->pb, MKBETAG('C', 'H', 'A', 'P'));
320  avio_wb32(s->pb, len);
321  avio_wb16(s->pb, 0);
322  avio_write(s->pb, dyn_buf, len);
323 
324 fail:
325  ffio_free_dyn_buf(&dyn_bc);
326 
327  return ret;
328 }
329 
331 {
332  int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
334  int i, ret;
335 
337  if ((ret = write_metadata(s->pb, &s->metadata, id3, enc)) < 0)
338  return ret;
339 
340  if ((ret = write_ctoc(s, id3, enc)) < 0)
341  return ret;
342 
343  for (i = 0; i < s->nb_chapters; i++) {
344  if ((ret = write_chapter(s, id3, i, enc)) < 0)
345  return ret;
346  }
347 
348  return 0;
349 }
350 
352 {
353  AVStream *st = s->streams[pkt->stream_index];
355 
356  AVIOContext *dyn_buf;
357  uint8_t *buf;
358  const CodecMime *mime = ff_id3v2_mime_tags;
359  const char *mimetype = NULL, *desc = "";
360  int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
362  int i, len, type = 0, ret;
363 
364  /* get the mimetype*/
365  while (mime->id != AV_CODEC_ID_NONE) {
366  if (mime->id == st->codecpar->codec_id) {
367  mimetype = mime->str;
368  break;
369  }
370  mime++;
371  }
372  if (!mimetype) {
373  av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot "
374  "write an attached picture.\n", st->index);
375  return AVERROR(EINVAL);
376  }
377 
378  /* get the picture type */
379  e = av_dict_get(st->metadata, "comment", NULL, 0);
380  for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) {
382  type = i;
383  break;
384  }
385  }
386 
387  /* get the description */
388  if ((e = av_dict_get(st->metadata, "title", NULL, 0)))
389  desc = e->value;
390 
391  /* use UTF16 only for non-ASCII strings */
392  if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(desc))
394 
395  /* start writing */
396  if ((ret = avio_open_dyn_buf(&dyn_buf)) < 0)
397  return ret;
398 
399  avio_w8(dyn_buf, enc);
400  avio_put_str(dyn_buf, mimetype);
401  avio_w8(dyn_buf, type);
402  id3v2_encode_string(dyn_buf, desc, enc);
403  avio_write(dyn_buf, pkt->data, pkt->size);
404  len = avio_get_dyn_buf(dyn_buf, &buf);
405 
406  avio_wb32(s->pb, MKBETAG('A', 'P', 'I', 'C'));
407  if (id3->version == 3)
408  avio_wb32(s->pb, len);
409  else
410  id3v2_put_size(s->pb, len);
411  avio_wb16(s->pb, 0);
412  avio_write(s->pb, buf, len);
413  ffio_free_dyn_buf(&dyn_buf);
414 
415  id3->len += len + ID3v2_HEADER_SIZE;
416 
417  return 0;
418 }
419 
421  int padding_bytes)
422 {
423  int64_t cur_pos;
424 
425  if (padding_bytes < 0)
426  padding_bytes = 10;
427 
428  /* The ID3v2.3 specification states that 28 bits are used to represent the
429  * size of the whole tag. Therefore the current size of the tag needs to be
430  * subtracted from the upper limit of 2^28-1 to clip the value correctly. */
431  /* The minimum of 10 is an arbitrary amount of padding at the end of the tag
432  * to fix cover art display with some software such as iTunes, Traktor,
433  * Serato, Torq. */
434  padding_bytes = av_clip(padding_bytes, 10, 268435455 - id3->len);
435  ffio_fill(pb, 0, padding_bytes);
436  id3->len += padding_bytes;
437 
438  cur_pos = avio_tell(pb);
439  avio_seek(pb, id3->size_pos, SEEK_SET);
440  id3v2_put_size(pb, id3->len);
441  avio_seek(pb, cur_pos, SEEK_SET);
442 }
443 
444 int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version,
445  const char *magic)
446 {
447  ID3v2EncContext id3 = { 0 };
448  int ret;
449 
450  ff_id3v2_start(&id3, s->pb, id3v2_version, magic);
451  if ((ret = ff_id3v2_write_metadata(s, &id3)) < 0)
452  return ret;
454 
455  return 0;
456 }
unsigned int nb_chapters
Number of chapters in AVChapter array.
Definition: avformat.h:1580
#define NULL
Definition: coverity.c:32
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:447
Bytestream IO Context.
Definition: avio.h:161
Buffered I/O operations.
int size
int len
size of the tag written so far
Definition: id3v2.h:54
const char * desc
Definition: nvenc.c:79
int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
Convert and write all global metadata from s into an ID3v2 tag.
Definition: id3v2enc.c:330
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
#define ID3v2_PRIV_METADATA_PREFIX
Definition: id3v2.h:42
const char ff_id3v2_4_tags[][4]
ID3v2.4-only text information frames.
Definition: id3v2.c:96
const char * key
static AVPacket pkt
AVDictionary * metadata
Definition: avformat.h:1312
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1356
Format I/O context.
Definition: avformat.h:1351
ID3v2Encoding
Definition: id3v2.h:44
char str[32]
Definition: internal.h:48
Public dictionary API.
static int write_ctoc(AVFormatContext *s, ID3v2EncContext *id3, int enc)
Definition: id3v2enc.c:258
void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version, const char *magic)
Initialize an ID3v2 tag.
Definition: id3v2enc.c:205
#define ID3v2_HEADER_SIZE
Definition: id3v2.h:30
const AVMetadataConv ff_id3v2_34_metadata_conv[]
Definition: id3v2.c:45
uint8_t
#define AV_RB32
Definition: intreadwrite.h:130
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
const char data[16]
Definition: mxf.c:91
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
uint8_t * data
Definition: packet.h:355
uint32_t tag
Definition: movenc.c:1532
enum AVCodecID id
Definition: internal.h:49
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:213
#define av_log(a,...)
static const uint16_t table[]
Definition: prosumer.c:206
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1591
const AVMetadataConv ff_id3v2_4_metadata_conv[]
Definition: id3v2.c:64
#define AVERROR(e)
Definition: error.h:43
static int string_is_ascii(const uint8_t *str)
Definition: id3v2enc.c:40
void av_dict_free(AVDictionary **pm)
Free all the memory allocated for an AVDictionary struct and all keys and values. ...
Definition: dict.c:203
AVChapter ** chapters
Definition: avformat.h:1581
static int write_chapter(AVFormatContext *s, ID3v2EncContext *id3, int id, int enc)
Definition: id3v2enc.c:291
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5724
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
#define fail()
Definition: checkasm.h:123
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
const char * name
Definition: qsvenc.c:46
void ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:199
int64_t size_pos
offset of the tag total size
Definition: id3v2.h:53
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
#define s(width, name)
Definition: cbs_vp9.c:257
AVDictionary * metadata
Definition: avformat.h:940
void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb, int padding_bytes)
Finalize an opened ID3v2 tag.
Definition: id3v2enc.c:420
#define FF_ARRAY_ELEMS(a)
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1431
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
Definition: aviobuf.c:383
int metadata_header_padding
Number of bytes to be written as padding in a metadata header.
Definition: avformat.h:1851
Stream structure.
Definition: avformat.h:876
int64_t end
chapter start/end time in time_base units
Definition: avformat.h:1311
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
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
static int id3v2_check_write_tag(ID3v2EncContext *id3, AVIOContext *pb, AVDictionaryEntry *t, const char table[][4], enum ID3v2Encoding enc)
Definition: id3v2enc.c:152
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:191
long long int64_t
Definition: coverity.c:34
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
double value
Definition: eval.c:98
Rational number (pair of numerator and denominator).
Definition: rational.h:58
static int write_metadata(AVIOContext *pb, AVDictionary **metadata, ID3v2EncContext *id3, int enc)
Definition: id3v2enc.c:219
cl_device_type type
int avio_put_str16le(AVIOContext *s, const char *str)
Convert an UTF-8 string to UTF-16LE and write it.
static void id3v2_encode_string(AVIOContext *pb, const uint8_t *str, enum ID3v2Encoding enc)
Definition: id3v2enc.c:46
#define snprintf
Definition: snprintf.h:34
static av_const int av_isxdigit(int c)
Locale-independent conversion of ASCII isxdigit.
Definition: avstring.h:251
int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version, const char *magic)
Write an ID3v2 tag containing all global metadata from s.
Definition: id3v2enc.c:444
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:453
int64_t start
Definition: avformat.h:1311
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
static int id3v2_put_ttag(ID3v2EncContext *id3, AVIOContext *avioc, const char *str1, const char *str2, uint32_t tag, enum ID3v2Encoding enc)
Write a text frame with one (normal frames) or two (TXXX frames) strings according to encoding (only ...
Definition: id3v2enc.c:65
Main libavformat public API header.
int
if(ret< 0)
Definition: vf_mcdeint.c:279
static void id3v2_put_size(AVIOContext *pb, int size)
Definition: id3v2enc.c:32
AVRational time_base
time base in which the start/end timestamps are specified
Definition: avformat.h:1310
char * key
Definition: dict.h:86
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
#define MKBETAG(a, b, c, d)
Definition: common.h:407
const char ff_id3v2_3_tags[][4]
ID3v2.3-only text information frames.
Definition: id3v2.c:102
char * value
Definition: dict.h:87
static int id3v2_put_priv(ID3v2EncContext *id3, AVIOContext *avioc, const char *key, const char *data)
Write a priv frame with owner and data.
Definition: id3v2enc.c:104
int len
int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt)
Write an attached picture from pkt into an ID3v2 tag.
Definition: id3v2enc.c:351
static void id3v2_3_metadata_split_date(AVDictionary **pm)
Definition: id3v2enc.c:167
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:375
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:107
int stream_index
Definition: packet.h:357
int version
ID3v2 minor version, either 3 or 4.
Definition: id3v2.h:52
enum AVCodecID id
This structure stores compressed data.
Definition: packet.h:332
int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1368