FFmpeg
mp3enc.c
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1 /*
2  * MP3 muxer
3  * Copyright (c) 2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "avformat.h"
23 #include "avio_internal.h"
24 #include "id3v1.h"
25 #include "id3v2.h"
26 #include "rawenc.h"
27 #include "libavutil/avstring.h"
28 #include "libavcodec/mpegaudio.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/opt.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/crc.h"
36 #include "libavutil/mathematics.h"
37 #include "libavutil/replaygain.h"
38 
39 static int id3v1_set_string(AVFormatContext *s, const char *key,
40  uint8_t *buf, int buf_size)
41 {
43  if ((tag = av_dict_get(s->metadata, key, NULL, 0)))
44  av_strlcpy(buf, tag->value, buf_size);
45  return !!tag;
46 }
47 
49 {
51  int i, count = 0;
52 
53  memset(buf, 0, ID3v1_TAG_SIZE); /* fail safe */
54  buf[0] = 'T';
55  buf[1] = 'A';
56  buf[2] = 'G';
57  /* we knowingly overspecify each tag length by one byte to compensate for the mandatory null byte added by av_strlcpy */
58  count += id3v1_set_string(s, "TIT2", buf + 3, 30 + 1); //title
59  count += id3v1_set_string(s, "TPE1", buf + 33, 30 + 1); //author|artist
60  count += id3v1_set_string(s, "TALB", buf + 63, 30 + 1); //album
61  count += id3v1_set_string(s, "TDRC", buf + 93, 4 + 1); //date
62  count += id3v1_set_string(s, "comment", buf + 97, 30 + 1);
63  if ((tag = av_dict_get(s->metadata, "TRCK", NULL, 0))) { //track
64  buf[125] = 0;
65  buf[126] = atoi(tag->value);
66  count++;
67  }
68  buf[127] = 0xFF; /* default to unknown genre */
69  if ((tag = av_dict_get(s->metadata, "TCON", NULL, 0))) { //genre
70  for(i = 0; i <= ID3v1_GENRE_MAX; i++) {
71  if (!av_strcasecmp(tag->value, ff_id3v1_genre_str[i])) {
72  buf[127] = i;
73  count++;
74  break;
75  }
76  }
77  }
78  return count;
79 }
80 
81 #define XING_NUM_BAGS 400
82 #define XING_TOC_SIZE 100
83 // size of the XING/LAME data, starting from the Xing tag
84 #define XING_SIZE 156
85 
86 typedef struct MP3Context {
87  const AVClass *class;
92 
93  /* xing header */
94  // a buffer containing the whole XING/LAME frame
97 
98  AVCRC audio_crc; // CRC of the audio data
99  uint32_t audio_size; // total size of the audio data
100 
101  // offset of the XING/LAME frame in the file
103  // offset of the XING/INFO tag in the frame
105 
108  uint32_t want;
109  uint32_t seen;
110  uint32_t pos;
111  uint64_t bag[XING_NUM_BAGS];
114  int delay;
115  int padding;
116 
117  /* index of the audio stream */
119  /* number of attached pictures we still need to write */
121 
122  /* audio packets are queued here until we get all the attached pictures */
124 } MP3Context;
125 
126 static const uint8_t xing_offtbl[2][2] = {{32, 17}, {17, 9}};
127 
128 /*
129  * Write an empty XING header and initialize respective data.
130  */
132 {
133  MP3Context *mp3 = s->priv_data;
135  AVDictionaryEntry *enc = av_dict_get(s->streams[mp3->audio_stream_idx]->metadata, "encoder", NULL, 0);
136  AVIOContext *dyn_ctx;
137  int32_t header;
138  MPADecodeHeader mpah;
139  int srate_idx, i, channels;
140  int bitrate_idx;
141  int best_bitrate_idx = -1;
142  int best_bitrate_error = INT_MAX;
143  int ret;
144  int ver = 0;
145  int bytes_needed;
146 
147  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) || !mp3->write_xing)
148  return 0;
149 
150  for (i = 0; i < FF_ARRAY_ELEMS(avpriv_mpa_freq_tab); i++) {
151  const uint16_t base_freq = avpriv_mpa_freq_tab[i];
152 
153  if (par->sample_rate == base_freq) ver = 0x3; // MPEG 1
154  else if (par->sample_rate == base_freq / 2) ver = 0x2; // MPEG 2
155  else if (par->sample_rate == base_freq / 4) ver = 0x0; // MPEG 2.5
156  else continue;
157 
158  srate_idx = i;
159  break;
160  }
162  av_log(s, AV_LOG_WARNING, "Unsupported sample rate, not writing Xing header.\n");
163  return -1;
164  }
165 
166  switch (par->channels) {
167  case 1: channels = MPA_MONO; break;
168  case 2: channels = MPA_STEREO; break;
169  default: av_log(s, AV_LOG_WARNING, "Unsupported number of channels, "
170  "not writing Xing header.\n");
171  return -1;
172  }
173 
174  /* dummy MPEG audio header */
175  header = 0xffU << 24; // sync
176  header |= (0x7 << 5 | ver << 3 | 0x1 << 1 | 0x1) << 16; // sync/audio-version/layer 3/no crc*/
177  header |= (srate_idx << 2) << 8;
178  header |= channels << 6;
179 
180  for (bitrate_idx = 1; bitrate_idx < 15; bitrate_idx++) {
181  int bit_rate = 1000 * avpriv_mpa_bitrate_tab[ver != 3][3 - 1][bitrate_idx];
182  int error = FFABS(bit_rate - par->bit_rate);
183 
184  if (error < best_bitrate_error) {
185  best_bitrate_error = error;
186  best_bitrate_idx = bitrate_idx;
187  }
188  }
189  av_assert0(best_bitrate_idx >= 0);
190 
191  for (bitrate_idx = best_bitrate_idx; ; bitrate_idx++) {
192  int32_t mask = bitrate_idx << (4 + 8);
193  if (15 == bitrate_idx)
194  return -1;
195  header |= mask;
196 
197  ret = avpriv_mpegaudio_decode_header(&mpah, header);
198  av_assert0(ret >= 0);
199  mp3->xing_offset = xing_offtbl[mpah.lsf == 1][mpah.nb_channels == 1] + 4;
200  bytes_needed = mp3->xing_offset + XING_SIZE;
201 
202  if (bytes_needed <= mpah.frame_size)
203  break;
204 
205  header &= ~mask;
206  }
207 
208  ret = avio_open_dyn_buf(&dyn_ctx);
209  if (ret < 0)
210  return ret;
211 
212  avio_wb32(dyn_ctx, header);
213 
214  ffio_fill(dyn_ctx, 0, mp3->xing_offset - 4);
215  ffio_wfourcc(dyn_ctx, "Xing");
216  avio_wb32(dyn_ctx, 0x01 | 0x02 | 0x04 | 0x08); // frames / size / TOC / vbr scale
217 
218  mp3->size = mpah.frame_size;
219  mp3->want=1;
220  mp3->seen=0;
221  mp3->pos=0;
222 
223  avio_wb32(dyn_ctx, 0); // frames
224  avio_wb32(dyn_ctx, 0); // size
225 
226  // TOC
227  for (i = 0; i < XING_TOC_SIZE; i++)
228  avio_w8(dyn_ctx, (uint8_t)(255 * i / XING_TOC_SIZE));
229 
230  // vbr quality
231  // we write it, because some (broken) tools always expect it to be present
232  avio_wb32(dyn_ctx, 0);
233 
234  // encoder short version string
235  if (enc) {
236  uint8_t encoder_str[9] = { 0 };
237  if ( strlen(enc->value) > sizeof(encoder_str)
238  && !strcmp("Lavc libmp3lame", enc->value)) {
239  memcpy(encoder_str, "Lavf lame", 9);
240  } else
241  memcpy(encoder_str, enc->value, FFMIN(strlen(enc->value), sizeof(encoder_str)));
242 
243  avio_write(dyn_ctx, encoder_str, sizeof(encoder_str));
244  } else
245  avio_write(dyn_ctx, "Lavf\0\0\0\0\0", 9);
246 
247  avio_w8(dyn_ctx, 0); // tag revision 0 / unknown vbr method
248  avio_w8(dyn_ctx, 0); // unknown lowpass filter value
249  ffio_fill(dyn_ctx, 0, 8); // empty replaygain fields
250  avio_w8(dyn_ctx, 0); // unknown encoding flags
251  avio_w8(dyn_ctx, 0); // unknown abr/minimal bitrate
252  avio_wb24(dyn_ctx, 0); // empty encoder delay/padding
253 
254  avio_w8(dyn_ctx, 0); // misc
255  avio_w8(dyn_ctx, 0); // mp3gain
256  avio_wb16(dyn_ctx, 0); // preset
257 
258  // audio length and CRCs (will be updated later)
259  avio_wb32(dyn_ctx, 0); // music length
260  avio_wb16(dyn_ctx, 0); // music crc
261  avio_wb16(dyn_ctx, 0); // tag crc
262 
263  ffio_fill(dyn_ctx, 0, mpah.frame_size - bytes_needed);
264 
265  mp3->xing_frame_size = avio_close_dyn_buf(dyn_ctx, &mp3->xing_frame);
266  mp3->xing_frame_offset = avio_tell(s->pb);
267  avio_write(s->pb, mp3->xing_frame, mp3->xing_frame_size);
268 
269  mp3->audio_size = mp3->xing_frame_size;
270 
271  return 0;
272 }
273 
274 /*
275  * Add a frame to XING data.
276  * Following lame's "VbrTag.c".
277  */
279 {
280  int i;
281 
282  mp3->frames++;
283  mp3->seen++;
284  mp3->size += pkt->size;
285 
286  if (mp3->want == mp3->seen) {
287  mp3->bag[mp3->pos] = mp3->size;
288 
289  if (XING_NUM_BAGS == ++mp3->pos) {
290  /* shrink table to half size by throwing away each second bag. */
291  for (i = 1; i < XING_NUM_BAGS; i += 2)
292  mp3->bag[i >> 1] = mp3->bag[i];
293 
294  /* double wanted amount per bag. */
295  mp3->want *= 2;
296  /* adjust current position to half of table size. */
297  mp3->pos = XING_NUM_BAGS / 2;
298  }
299 
300  mp3->seen = 0;
301  }
302 }
303 
305 {
306  MP3Context *mp3 = s->priv_data;
307 
308  if (pkt->data && pkt->size >= 4) {
309  MPADecodeHeader mpah;
310  int ret;
311  int av_unused base;
312  uint32_t h;
313 
314  h = AV_RB32(pkt->data);
315  ret = avpriv_mpegaudio_decode_header(&mpah, h);
316  if (ret >= 0) {
317  if (!mp3->initial_bitrate)
318  mp3->initial_bitrate = mpah.bit_rate;
319  if ((mpah.bit_rate == 0) || (mp3->initial_bitrate != mpah.bit_rate))
320  mp3->has_variable_bitrate = 1;
321  } else {
322  av_log(s, AV_LOG_WARNING, "Audio packet of size %d (starting with %08"PRIX32"...) "
323  "is invalid, writing it anyway.\n", pkt->size, h);
324  }
325 
326 #ifdef FILTER_VBR_HEADERS
327  /* filter out XING and INFO headers. */
328  base = 4 + xing_offtbl[mpah.lsf == 1][mpah.nb_channels == 1];
329 
330  if (base + 4 <= pkt->size) {
331  uint32_t v = AV_RB32(pkt->data + base);
332 
333  if (MKBETAG('X','i','n','g') == v || MKBETAG('I','n','f','o') == v)
334  return 0;
335  }
336 
337  /* filter out VBRI headers. */
338  base = 4 + 32;
339 
340  if (base + 4 <= pkt->size && MKBETAG('V','B','R','I') == AV_RB32(pkt->data + base))
341  return 0;
342 #endif
343 
344  if (mp3->xing_offset) {
345  uint8_t *side_data = NULL;
346  int side_data_size = 0;
347 
348  mp3_xing_add_frame(mp3, pkt);
349  mp3->audio_size += pkt->size;
351  mp3->audio_crc, pkt->data, pkt->size);
352 
353  side_data = av_packet_get_side_data(pkt,
355  &side_data_size);
356  if (side_data && side_data_size >= 10) {
357  mp3->padding = FFMAX(AV_RL32(side_data + 4) + 528 + 1, 0);
358  if (!mp3->delay)
359  mp3->delay = FFMAX(AV_RL32(side_data) - 528 - 1, 0);
360  } else {
361  mp3->padding = 0;
362  }
363  }
364  }
365 
366  return ff_raw_write_packet(s, pkt);
367 }
368 
370 {
371  MP3Context *mp3 = s->priv_data;
372  AVPacket pkt;
373  int ret = 0, write = 1;
374 
376  mp3_write_xing(s);
377 
378  while (mp3->queue) {
379  ff_packet_list_get(&mp3->queue, &mp3->queue_end, &pkt);
380  if (write && (ret = mp3_write_audio_packet(s, &pkt)) < 0)
381  write = 0;
382  av_packet_unref(&pkt);
383  }
384  return ret;
385 }
386 
388 {
389  MP3Context *mp3 = s->priv_data;
390  AVReplayGain *rg;
391  uint16_t tag_crc;
392  uint8_t *toc;
393  int i, rg_size;
394  int64_t old_pos = avio_tell(s->pb);
395 
396  /* replace "Xing" identification string with "Info" for CBR files. */
397  if (!mp3->has_variable_bitrate)
398  AV_WL32(mp3->xing_frame + mp3->xing_offset, MKTAG('I', 'n', 'f', 'o'));
399 
400  AV_WB32(mp3->xing_frame + mp3->xing_offset + 8, mp3->frames);
401  AV_WB32(mp3->xing_frame + mp3->xing_offset + 12, mp3->size);
402 
403  toc = mp3->xing_frame + mp3->xing_offset + 16;
404  toc[0] = 0; // first toc entry has to be zero.
405  for (i = 1; i < XING_TOC_SIZE; ++i) {
406  int j = i * mp3->pos / XING_TOC_SIZE;
407  int seek_point = 256LL * mp3->bag[j] / mp3->size;
408  toc[i] = FFMIN(seek_point, 255);
409  }
410 
411  /* write replaygain */
413  &rg_size);
414  if (rg && rg_size >= sizeof(*rg)) {
415  uint16_t val;
416 
417  AV_WB32(mp3->xing_frame + mp3->xing_offset + 131,
418  av_rescale(rg->track_peak, 1 << 23, 100000));
419 
420  if (rg->track_gain != INT32_MIN) {
421  val = FFABS(rg->track_gain / 10000) & ((1 << 9) - 1);
422  val |= (rg->track_gain < 0) << 9;
423  val |= 1 << 13;
424  AV_WB16(mp3->xing_frame + mp3->xing_offset + 135, val);
425  }
426 
427  if (rg->album_gain != INT32_MIN) {
428  val = FFABS(rg->album_gain / 10000) & ((1 << 9) - 1);
429  val |= (rg->album_gain < 0) << 9;
430  val |= 1 << 14;
431  AV_WB16(mp3->xing_frame + mp3->xing_offset + 137, val);
432  }
433  }
434 
435  /* write encoder delay/padding */
436  if (mp3->delay >= 1 << 12) {
437  mp3->delay = (1 << 12) - 1;
438  av_log(s, AV_LOG_WARNING, "Too many samples of initial padding.\n");
439  }
440  if (mp3->padding >= 1 << 12) {
441  mp3->padding = (1 << 12) - 1;
442  av_log(s, AV_LOG_WARNING, "Too many samples of trailing padding.\n");
443  }
444  AV_WB24(mp3->xing_frame + mp3->xing_offset + 141, (mp3->delay << 12) + mp3->padding);
445 
446  AV_WB32(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 8, mp3->audio_size);
447  AV_WB16(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 4, mp3->audio_crc);
448 
449  tag_crc = av_crc(av_crc_get_table(AV_CRC_16_ANSI_LE), 0, mp3->xing_frame, 190);
450  AV_WB16(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 2, tag_crc);
451 
452  avio_seek(s->pb, mp3->xing_frame_offset, SEEK_SET);
453  avio_write(s->pb, mp3->xing_frame, mp3->xing_frame_size);
454  avio_seek(s->pb, old_pos, SEEK_SET);
455 }
456 
458 {
460  MP3Context *mp3 = s->priv_data;
461 
462  if (mp3->pics_to_write) {
463  av_log(s, AV_LOG_WARNING, "No packets were sent for some of the "
464  "attached pictures.\n");
465  mp3_queue_flush(s);
466  }
467 
468  /* write the id3v1 tag */
469  if (mp3->write_id3v1 && id3v1_create_tag(s, buf) > 0) {
470  avio_write(s->pb, buf, ID3v1_TAG_SIZE);
471  }
472 
473  if (mp3->xing_offset)
474  mp3_update_xing(s);
475 
476  av_freep(&mp3->xing_frame);
477 
478  return 0;
479 }
480 
481 static int query_codec(enum AVCodecID id, int std_compliance)
482 {
484  while(cm->id != AV_CODEC_ID_NONE) {
485  if(id == cm->id)
486  return MKTAG('A', 'P', 'I', 'C');
487  cm++;
488  }
489  return -1;
490 }
491 
492 static const AVOption options[] = {
493  { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
494  offsetof(MP3Context, id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 0, 4, AV_OPT_FLAG_ENCODING_PARAM},
495  { "write_id3v1", "Enable ID3v1 writing. ID3v1 tags are written in UTF-8 which may not be supported by most software.",
496  offsetof(MP3Context, write_id3v1), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
497  { "write_xing", "Write the Xing header containing file duration.",
498  offsetof(MP3Context, write_xing), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
499  { NULL },
500 };
501 
502 static const AVClass mp3_muxer_class = {
503  .class_name = "MP3 muxer",
504  .item_name = av_default_item_name,
505  .option = options,
506  .version = LIBAVUTIL_VERSION_INT,
507 };
508 
510 {
511  MP3Context *mp3 = s->priv_data;
512 
513  if (pkt->stream_index == mp3->audio_stream_idx) {
514  if (mp3->pics_to_write) {
515  /* buffer audio packets until we get all the pictures */
517 
518  if (ret < 0) {
519  av_log(s, AV_LOG_WARNING, "Not enough memory to buffer audio. Skipping picture streams\n");
520  mp3->pics_to_write = 0;
521  mp3_queue_flush(s);
522  return mp3_write_audio_packet(s, pkt);
523  }
524  } else
525  return mp3_write_audio_packet(s, pkt);
526  } else {
527  int ret;
528 
529  /* warn only once for each stream */
530  if (s->streams[pkt->stream_index]->nb_frames == 1) {
531  av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
532  " ignoring.\n", pkt->stream_index);
533  }
534  if (!mp3->pics_to_write || s->streams[pkt->stream_index]->nb_frames >= 1)
535  return 0;
536 
537  if ((ret = ff_id3v2_write_apic(s, &mp3->id3, pkt)) < 0)
538  return ret;
539  mp3->pics_to_write--;
540 
541  /* flush the buffered audio packets */
542  if (!mp3->pics_to_write &&
543  (ret = mp3_queue_flush(s)) < 0)
544  return ret;
545  }
546 
547  return 0;
548 }
549 
550 /**
551  * Write an ID3v2 header at beginning of stream
552  */
553 
554 static int mp3_write_header(struct AVFormatContext *s)
555 {
556  MP3Context *mp3 = s->priv_data;
557  int ret, i;
558 
559  if (mp3->id3v2_version &&
560  mp3->id3v2_version != 3 &&
561  mp3->id3v2_version != 4) {
562  av_log(s, AV_LOG_ERROR, "Invalid ID3v2 version requested: %d. Only "
563  "3, 4 or 0 (disabled) are allowed.\n", mp3->id3v2_version);
564  return AVERROR(EINVAL);
565  }
566 
567  /* check the streams -- we want exactly one audio and arbitrary number of
568  * video (attached pictures) */
569  mp3->audio_stream_idx = -1;
570  for (i = 0; i < s->nb_streams; i++) {
571  AVStream *st = s->streams[i];
572  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
573  if (mp3->audio_stream_idx >= 0 || st->codecpar->codec_id != AV_CODEC_ID_MP3) {
574  av_log(s, AV_LOG_ERROR, "Invalid audio stream. Exactly one MP3 "
575  "audio stream is required.\n");
576  return AVERROR(EINVAL);
577  }
578  mp3->audio_stream_idx = i;
579  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO) {
580  av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in MP3.\n");
581  return AVERROR(EINVAL);
582  }
583  }
584  if (mp3->audio_stream_idx < 0) {
585  av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
586  return AVERROR(EINVAL);
587  }
588  mp3->pics_to_write = s->nb_streams - 1;
589 
590  if (mp3->pics_to_write && !mp3->id3v2_version) {
591  av_log(s, AV_LOG_ERROR, "Attached pictures were requested, but the "
592  "ID3v2 header is disabled.\n");
593  return AVERROR(EINVAL);
594  }
595 
596  if (mp3->id3v2_version) {
598  ret = ff_id3v2_write_metadata(s, &mp3->id3);
599  if (ret < 0)
600  return ret;
601  }
602 
603  if (!mp3->pics_to_write) {
604  if (mp3->id3v2_version)
606  mp3_write_xing(s);
607  }
608 
609  return 0;
610 }
611 
613  .name = "mp3",
614  .long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"),
615  .mime_type = "audio/mpeg",
616  .extensions = "mp3",
617  .priv_data_size = sizeof(MP3Context),
618  .audio_codec = AV_CODEC_ID_MP3,
619  .video_codec = AV_CODEC_ID_PNG,
625  .priv_class = &mp3_muxer_class,
626 };
#define MPA_STEREO
Definition: mpegaudio.h:46
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:689
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:863
Bytestream IO Context.
Definition: avio.h:161
#define XING_NUM_BAGS
Definition: mp3enc.c:81
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1459
AVOption.
Definition: opt.h:246
int ff_packet_list_put(AVPacketList **head, AVPacketList **tail, AVPacket *pkt, int flags)
Append an AVPacket to the list.
Definition: utils.c:447
void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version, const char *magic)
Initialize an ID3v2 tag.
Definition: id3v2enc.c:205
static int mp3_write_audio_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mp3enc.c:304
int64_t xing_frame_offset
Definition: mp3enc.c:102
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
void ff_id3v2_finish(ID3v2EncContext *id3, AVIOContext *pb, int padding_bytes)
Finalize an opened ID3v2 tag.
Definition: id3v2enc.c:425
uint32_t pos
Definition: mp3enc.c:110
channels
Definition: aptx.c:30
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
int size
Definition: avcodec.h:1478
#define ID3v2_DEFAULT_MAGIC
Default magic bytes for ID3v2 header: "ID3".
Definition: id3v2.h:35
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
const char * key
static AVPacket pkt
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1430
mpeg audio layer common tables.
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3949
uint64_t bag[XING_NUM_BAGS]
Definition: mp3enc.c:111
uint32_t track_peak
Peak track amplitude, with 100000 representing full scale (but values may overflow).
Definition: replaygain.h:39
uint8_t base
Definition: vp3data.h:202
Format I/O context.
Definition: avformat.h:1358
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Public dictionary API.
static void mp3_update_xing(AVFormatContext *s)
Definition: mp3enc.c:387
int32_t size
Definition: mp3enc.c:107
static int mp3_write_trailer(struct AVFormatContext *s)
Definition: mp3enc.c:457
uint8_t
int delay
Definition: mp3enc.c:114
AVOptions.
const uint16_t avpriv_mpa_freq_tab[3]
Definition: mpegaudiodata.c:40
uint8_t * av_stream_get_side_data(const AVStream *stream, enum AVPacketSideDataType type, int *size)
Get side information from stream.
Definition: utils.c:5453
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:1426
#define FF_PACKETLIST_FLAG_REF_PACKET
Create a new reference for the packet instead of transferring the ownership of the existing one to th...
Definition: internal.h:757
Public header for CRC hash function implementation.
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:1477
int avpriv_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
uint32_t tag
Definition: movenc.c:1496
static const uint8_t xing_offtbl[2][2]
Definition: mp3enc.c:126
enum AVCodecID id
Definition: internal.h:51
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
static const uint8_t header[24]
Definition: sdr2.c:67
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:58
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
AVCRC audio_crc
Definition: mp3enc.c:98
int32_t album_gain
Same as track_gain, but for the whole album.
Definition: replaygain.h:43
#define av_log(a,...)
#define cm
Definition: dvbsubdec.c:37
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
AVPacketList * queue_end
Definition: mp3enc.c:123
#define U(x)
Definition: vp56_arith.h:37
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
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
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1598
static const uint16_t mask[17]
Definition: lzw.c:38
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:350
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:565
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
simple assert() macros that are a bit more flexible than ISO C assert().
uint32_t want
Definition: mp3enc.c:108
GLsizei count
Definition: opengl_enc.c:108
#define FFMAX(a, b)
Definition: common.h:94
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
int initial_bitrate
Definition: mp3enc.c:112
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
static int mp3_write_xing(AVFormatContext *s)
Definition: mp3enc.c:131
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
Convert and write all global metadata from s into an ID3v2 tag.
Definition: id3v2enc.c:335
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
void ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:204
int id3v2_version
Definition: mp3enc.c:89
#define FFMIN(a, b)
Definition: common.h:96
int av_strcasecmp(const char *a, const char *b)
Locale-independent case-insensitive compare.
Definition: avstring.c:213
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:490
const char * name
Definition: avformat.h:505
static int query_codec(enum AVCodecID id, int std_compliance)
Definition: mp3enc.c:481
int32_t
uint32_t av_crc(const AVCRC *ctx, uint32_t crc, const uint8_t *buffer, size_t length)
Calculate the CRC of a block.
Definition: crc.c:392
AVPacketList * queue
Definition: mp3enc.c:123
#define AV_WB24(p, d)
Definition: intreadwrite.h:450
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
#define s(width, name)
Definition: cbs_vp9.c:257
int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawenc.c:29
AVDictionary * metadata
Definition: avformat.h:945
int padding
Definition: mp3enc.c:115
int write_id3v1
Definition: mp3enc.c:90
static void error(const char *err)
#define FF_ARRAY_ELEMS(a)
int metadata_header_padding
Number of bytes to be written as padding in a metadata header.
Definition: avformat.h:1858
Stream structure.
Definition: avformat.h:881
int pics_to_write
Definition: mp3enc.c:120
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:467
static const AVClass mp3_muxer_class
Definition: mp3enc.c:502
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int has_variable_bitrate
Definition: mp3enc.c:113
int audio_stream_idx
Definition: mp3enc.c:118
int xing_offset
Definition: mp3enc.c:104
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
int32_t frames
Definition: mp3enc.c:106
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
static const AVOption options[]
Definition: mp3enc.c:492
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
void * buf
Definition: avisynth_c.h:766
int xing_frame_size
Definition: mp3enc.c:96
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AV_WB32(p, v)
Definition: intreadwrite.h:419
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1300
uint8_t * xing_frame
Definition: mp3enc.c:95
#define MPA_MONO
Definition: mpegaudio.h:49
#define XING_SIZE
Definition: mp3enc.c:84
uint32_t audio_size
Definition: mp3enc.c:99
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:478
#define flags(name, subs,...)
Definition: cbs_av1.c:561
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: avcodec.h:1243
static int id3v1_set_string(AVFormatContext *s, const char *key, uint8_t *buf, int buf_size)
Definition: mp3enc.c:39
int ff_id3v2_write_apic(AVFormatContext *s, ID3v2EncContext *id3, AVPacket *pkt)
Write an attached picture from pkt into an ID3v2 tag.
Definition: id3v2enc.c:356
int write_xing
Definition: mp3enc.c:91
const AVCRC * av_crc_get_table(AVCRCId crc_id)
Get an initialized standard CRC table.
Definition: crc.c:374
int sample_rate
Audio only.
Definition: avcodec.h:4067
MPEG Audio header decoder.
int ff_packet_list_get(AVPacketList **head, AVPacketList **tail, AVPacket *pkt)
Remove the oldest AVPacket in the list and return it.
Definition: utils.c:1550
static int mp3_queue_flush(AVFormatContext *s)
Definition: mp3enc.c:369
Main libavformat public API header.
AVOutputFormat ff_mp3_muxer
Definition: mp3enc.c:612
static int mp3_write_header(struct AVFormatContext *s)
Write an ID3v2 header at beginning of stream.
Definition: mp3enc.c:554
mpeg audio declarations for both encoder and decoder.
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:932
#define MKBETAG(a, b, c, d)
Definition: common.h:367
#define XING_TOC_SIZE
Definition: mp3enc.c:82
char * value
Definition: dict.h:87
void * priv_data
Format private data.
Definition: avformat.h:1386
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
int channels
Audio only.
Definition: avcodec.h:4063
#define ID3v1_TAG_SIZE
Definition: id3v1.h:27
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:380
#define av_freep(p)
int32_t track_gain
Track replay gain in microbels (divide by 100000 to get the value in dB).
Definition: replaygain.h:34
const uint16_t avpriv_mpa_bitrate_tab[2][3][15]
Definition: mpegaudiodata.c:30
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int stream_index
Definition: avcodec.h:1479
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
static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
Definition: mp3enc.c:48
#define MKTAG(a, b, c, d)
Definition: common.h:366
ReplayGain information (see http://wiki.hydrogenaudio.org/index.php?title=ReplayGain_1.0_specification).
Definition: replaygain.h:29
static int mp3_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mp3enc.c:509
#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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1454
uint32_t AVCRC
Definition: crc.h:47
ID3v2EncContext id3
Definition: mp3enc.c:88
#define av_unused
Definition: attributes.h:125
static void mp3_xing_add_frame(MP3Context *mp3, AVPacket *pkt)
Definition: mp3enc.c:278
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
uint32_t seen
Definition: mp3enc.c:109