FFmpeg
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;
69  uint8_t *pb;
70  AVIOContext *dyn_buf;
71  if (avio_open_dyn_buf(&dyn_buf) < 0)
72  return AVERROR(ENOMEM);
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_close_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  av_freep(&pb);
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;
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 (avio_open_dyn_buf(&dyn_buf) < 0)
115  return AVERROR(ENOMEM);
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_close_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  av_free(pb);
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_chapter(AVFormatContext *s, ID3v2EncContext *id3, int id, int enc)
259 {
260  const AVRational time_base = {1, 1000};
261  AVChapter *ch = s->chapters[id];
262  uint8_t *dyn_buf = NULL;
263  AVIOContext *dyn_bc = NULL;
264  char name[123];
265  int len, start, end, ret;
266 
267  if ((ret = avio_open_dyn_buf(&dyn_bc)) < 0)
268  goto fail;
269 
270  start = av_rescale_q(ch->start, ch->time_base, time_base);
271  end = av_rescale_q(ch->end, ch->time_base, time_base);
272 
273  snprintf(name, 122, "ch%d", id);
274  id3->len += avio_put_str(dyn_bc, name);
275  avio_wb32(dyn_bc, start);
276  avio_wb32(dyn_bc, end);
277  avio_wb32(dyn_bc, 0xFFFFFFFFu);
278  avio_wb32(dyn_bc, 0xFFFFFFFFu);
279 
280  if ((ret = write_metadata(dyn_bc, &ch->metadata, id3, enc)) < 0)
281  goto fail;
282 
283  len = avio_close_dyn_buf(dyn_bc, &dyn_buf);
284  id3->len += 16 + ID3v2_HEADER_SIZE;
285 
286  avio_wb32(s->pb, MKBETAG('C', 'H', 'A', 'P'));
287  avio_wb32(s->pb, len);
288  avio_wb16(s->pb, 0);
289  avio_write(s->pb, dyn_buf, len);
290 
291 fail:
292  if (dyn_bc && !dyn_buf)
293  avio_close_dyn_buf(dyn_bc, &dyn_buf);
294  av_freep(&dyn_buf);
295 
296  return ret;
297 }
298 
300 {
301  int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
303  int i, ret;
304 
306  if ((ret = write_metadata(s->pb, &s->metadata, id3, enc)) < 0)
307  return ret;
308 
309  for (i = 0; i < s->nb_chapters; i++) {
310  if ((ret = write_chapter(s, id3, i, enc)) < 0)
311  return ret;
312  }
313 
314  return 0;
315 }
316 
318 {
319  AVStream *st = s->streams[pkt->stream_index];
321 
322  AVIOContext *dyn_buf;
323  uint8_t *buf;
324  const CodecMime *mime = ff_id3v2_mime_tags;
325  const char *mimetype = NULL, *desc = "";
326  int enc = id3->version == 3 ? ID3v2_ENCODING_UTF16BOM :
328  int i, len, type = 0;
329 
330  /* get the mimetype*/
331  while (mime->id != AV_CODEC_ID_NONE) {
332  if (mime->id == st->codecpar->codec_id) {
333  mimetype = mime->str;
334  break;
335  }
336  mime++;
337  }
338  if (!mimetype) {
339  av_log(s, AV_LOG_ERROR, "No mimetype is known for stream %d, cannot "
340  "write an attached picture.\n", st->index);
341  return AVERROR(EINVAL);
342  }
343 
344  /* get the picture type */
345  e = av_dict_get(st->metadata, "comment", NULL, 0);
346  for (i = 0; e && i < FF_ARRAY_ELEMS(ff_id3v2_picture_types); i++) {
348  type = i;
349  break;
350  }
351  }
352 
353  /* get the description */
354  if ((e = av_dict_get(st->metadata, "title", NULL, 0)))
355  desc = e->value;
356 
357  /* use UTF16 only for non-ASCII strings */
358  if (enc == ID3v2_ENCODING_UTF16BOM && string_is_ascii(desc))
360 
361  /* start writing */
362  if (avio_open_dyn_buf(&dyn_buf) < 0)
363  return AVERROR(ENOMEM);
364 
365  avio_w8(dyn_buf, enc);
366  avio_put_str(dyn_buf, mimetype);
367  avio_w8(dyn_buf, type);
368  id3v2_encode_string(dyn_buf, desc, enc);
369  avio_write(dyn_buf, pkt->data, pkt->size);
370  len = avio_close_dyn_buf(dyn_buf, &buf);
371 
372  avio_wb32(s->pb, MKBETAG('A', 'P', 'I', 'C'));
373  if (id3->version == 3)
374  avio_wb32(s->pb, len);
375  else
376  id3v2_put_size(s->pb, len);
377  avio_wb16(s->pb, 0);
378  avio_write(s->pb, buf, len);
379  av_freep(&buf);
380 
381  id3->len += len + ID3v2_HEADER_SIZE;
382 
383  return 0;
384 }
385 
387  int padding_bytes)
388 {
389  int64_t cur_pos;
390 
391  if (padding_bytes < 0)
392  padding_bytes = 10;
393 
394  /* The ID3v2.3 specification states that 28 bits are used to represent the
395  * size of the whole tag. Therefore the current size of the tag needs to be
396  * subtracted from the upper limit of 2^28-1 to clip the value correctly. */
397  /* The minimum of 10 is an arbitrary amount of padding at the end of the tag
398  * to fix cover art display with some software such as iTunes, Traktor,
399  * Serato, Torq. */
400  padding_bytes = av_clip(padding_bytes, 10, 268435455 - id3->len);
401  ffio_fill(pb, 0, padding_bytes);
402  id3->len += padding_bytes;
403 
404  cur_pos = avio_tell(pb);
405  avio_seek(pb, id3->size_pos, SEEK_SET);
406  id3v2_put_size(pb, id3->len);
407  avio_seek(pb, cur_pos, SEEK_SET);
408 }
409 
410 int ff_id3v2_write_simple(struct AVFormatContext *s, int id3v2_version,
411  const char *magic)
412 {
413  ID3v2EncContext id3 = { 0 };
414  int ret;
415 
416  ff_id3v2_start(&id3, s->pb, id3v2_version, magic);
417  if ((ret = ff_id3v2_write_metadata(s, &id3)) < 0)
418  return ret;
420 
421  return 0;
422 }
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:469
Bytestream IO Context.
Definition: avio.h:161
Buffered I/O operations.
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1420
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
int len
size of the tag written so far
Definition: id3v2.h:54
const char * desc
Definition: nvenc.c:68
int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
Convert and write all global metadata from s into an ID3v2 tag.
Definition: id3v2enc.c:299
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3944
int index
stream index in AVFormatContext
Definition: avformat.h:875
int size
Definition: avcodec.h:1469
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(INT64_C(1)<< 63)))#define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};static void cpy1(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, len);}static void cpy2(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 2 *len);}static void cpy4(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 4 *len);}static void cpy8(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&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);return ctx;}void swri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len){int ch;int off=0;const int os=(out->planar?1:out->ch_count)*out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){int planes=in->planar?in->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){int planes=out->planar?out->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){int planes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
#define ID3v2_PRIV_METADATA_PREFIX
Definition: id3v2.h:42
GLint GLenum type
Definition: opengl_enc.c:105
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:1391
Format I/O context.
Definition: avformat.h:1351
ID3v2Encoding
Definition: id3v2.h:44
char str[32]
Definition: internal.h:50
Public dictionary API.
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
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
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
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
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: avcodec.h:1468
uint32_t tag
Definition: movenc.c:1501
enum AVCodecID id
Definition: internal.h:51
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
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
#define av_log(a,...)
static const uint16_t table[]
Definition: prosumer.c:201
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 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
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:258
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5660
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:118
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
void ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:204
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:938
void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb, int padding_bytes)
Finalize an opened ID3v2 tag.
Definition: id3v2enc.c:386
#define FF_ARRAY_ELEMS(a)
void ffio_free_dyn_buf(AVIOContext **s)
Free a dynamic buffer.
Definition: aviobuf.c:1450
if(ret)
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
Definition: aviobuf.c:385
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:874
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:196
void * buf
Definition: avisynth_c.h:690
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
static int write_metadata(AVIOContext *pb, AVDictionary **metadata, ID3v2EncContext *id3, int enc)
Definition: id3v2enc.c:219
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:410
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:475
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
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:367
const char ff_id3v2_3_tags[][4]
ID3v2.3-only text information frames.
Definition: id3v2.c:102
#define av_free(p)
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:317
static void id3v2_3_metadata_split_date(AVDictionary **pm)
Definition: id3v2enc.c:167
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:377
#define av_freep(p)
void INT64 start
Definition: avisynth_c.h:690
#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:1021
const char *const ff_id3v2_picture_types[21]
Definition: id3v2.c:107
int stream_index
Definition: avcodec.h:1470
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int version
ID3v2 minor version, either 3 or 4.
Definition: id3v2.h:52
enum AVCodecID id
This structure stores compressed data.
Definition: avcodec.h:1445
const char * name
Definition: opengl_enc.c:103