FFmpeg  4.3
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 
48 // refer to: http://id3.org/ID3v1
50 {
52  int i, count = 0;
53 
54  memset(buf, 0, ID3v1_TAG_SIZE); /* fail safe */
55  buf[0] = 'T';
56  buf[1] = 'A';
57  buf[2] = 'G';
58  /* we knowingly overspecify each tag length by one byte to compensate for the mandatory null byte added by av_strlcpy */
59  count += id3v1_set_string(s, "TIT2", buf + 3, 30 + 1); //title
60  count += id3v1_set_string(s, "TPE1", buf + 33, 30 + 1); //author|artist
61  count += id3v1_set_string(s, "TALB", buf + 63, 30 + 1); //album
62  if ((tag = av_dict_get(s->metadata, "TYER", NULL, 0))) { //year
63  av_strlcpy(buf + 93, tag->value, 4 + 1);
64  count++;
65  } else if ((tag = av_dict_get(s->metadata, "TDRC", NULL, 0))) {
66  av_strlcpy(buf + 93, tag->value, 4 + 1);
67  count++;
68  } else if ((tag = av_dict_get(s->metadata, "TDAT", NULL, 0))) {
69  av_strlcpy(buf + 93, tag->value, 4 + 1);
70  count++;
71  }
72 
73  count += id3v1_set_string(s, "comment", buf + 97, 30 + 1);
74  if ((tag = av_dict_get(s->metadata, "TRCK", NULL, 0))) { //track
75  buf[125] = 0;
76  buf[126] = atoi(tag->value);
77  count++;
78  }
79  buf[127] = 0xFF; /* default to unknown genre */
80  if ((tag = av_dict_get(s->metadata, "TCON", NULL, 0))) { //genre
81  for(i = 0; i <= ID3v1_GENRE_MAX; i++) {
82  if (!av_strcasecmp(tag->value, ff_id3v1_genre_str[i])) {
83  buf[127] = i;
84  count++;
85  break;
86  }
87  }
88  }
89  return count;
90 }
91 
92 #define XING_NUM_BAGS 400
93 #define XING_TOC_SIZE 100
94 // size of the XING/LAME data, starting from the Xing tag
95 #define XING_SIZE 156
96 
97 typedef struct MP3Context {
98  const AVClass *class;
103 
104  /* xing header */
105  // a buffer containing the whole XING/LAME frame
108 
109  AVCRC audio_crc; // CRC of the audio data
110  uint32_t audio_size; // total size of the audio data
111 
112  // offset of the XING/LAME frame in the file
114  // offset of the XING/INFO tag in the frame
116 
119  uint32_t want;
120  uint32_t seen;
121  uint32_t pos;
122  uint64_t bag[XING_NUM_BAGS];
125  int delay;
126  int padding;
127 
128  /* index of the audio stream */
130  /* number of attached pictures we still need to write */
132 
133  /* audio packets are queued here until we get all the attached pictures */
135 } MP3Context;
136 
137 static const uint8_t xing_offtbl[2][2] = {{32, 17}, {17, 9}};
138 
139 /*
140  * Write an empty XING header and initialize respective data.
141  */
143 {
144  MP3Context *mp3 = s->priv_data;
146  AVDictionaryEntry *enc = av_dict_get(s->streams[mp3->audio_stream_idx]->metadata, "encoder", NULL, 0);
147  AVIOContext *dyn_ctx;
148  int32_t header;
149  MPADecodeHeader mpah;
150  int srate_idx, i, channels;
151  int bitrate_idx;
152  int best_bitrate_idx = -1;
153  int best_bitrate_error = INT_MAX;
154  int ret;
155  int ver = 0;
156  int bytes_needed;
157 
158  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL) || !mp3->write_xing)
159  return 0;
160 
161  for (i = 0; i < FF_ARRAY_ELEMS(avpriv_mpa_freq_tab); i++) {
162  const uint16_t base_freq = avpriv_mpa_freq_tab[i];
163 
164  if (par->sample_rate == base_freq) ver = 0x3; // MPEG 1
165  else if (par->sample_rate == base_freq / 2) ver = 0x2; // MPEG 2
166  else if (par->sample_rate == base_freq / 4) ver = 0x0; // MPEG 2.5
167  else continue;
168 
169  srate_idx = i;
170  break;
171  }
173  av_log(s, AV_LOG_WARNING, "Unsupported sample rate, not writing Xing header.\n");
174  return -1;
175  }
176 
177  switch (par->channels) {
178  case 1: channels = MPA_MONO; break;
179  case 2: channels = MPA_STEREO; break;
180  default: av_log(s, AV_LOG_WARNING, "Unsupported number of channels, "
181  "not writing Xing header.\n");
182  return -1;
183  }
184 
185  /* dummy MPEG audio header */
186  header = 0xffU << 24; // sync
187  header |= (0x7 << 5 | ver << 3 | 0x1 << 1 | 0x1) << 16; // sync/audio-version/layer 3/no crc*/
188  header |= (srate_idx << 2) << 8;
189  header |= channels << 6;
190 
191  for (bitrate_idx = 1; bitrate_idx < 15; bitrate_idx++) {
192  int bit_rate = 1000 * avpriv_mpa_bitrate_tab[ver != 3][3 - 1][bitrate_idx];
193  int error = FFABS(bit_rate - par->bit_rate);
194 
195  if (error < best_bitrate_error) {
196  best_bitrate_error = error;
197  best_bitrate_idx = bitrate_idx;
198  }
199  }
200  av_assert0(best_bitrate_idx >= 0);
201 
202  for (bitrate_idx = best_bitrate_idx; ; bitrate_idx++) {
203  int32_t mask = bitrate_idx << (4 + 8);
204  if (15 == bitrate_idx)
205  return -1;
206  header |= mask;
207 
208  ret = avpriv_mpegaudio_decode_header(&mpah, header);
209  av_assert0(ret >= 0);
210  mp3->xing_offset = xing_offtbl[mpah.lsf == 1][mpah.nb_channels == 1] + 4;
211  bytes_needed = mp3->xing_offset + XING_SIZE;
212 
213  if (bytes_needed <= mpah.frame_size)
214  break;
215 
216  header &= ~mask;
217  }
218 
219  ret = avio_open_dyn_buf(&dyn_ctx);
220  if (ret < 0)
221  return ret;
222 
223  avio_wb32(dyn_ctx, header);
224 
225  ffio_fill(dyn_ctx, 0, mp3->xing_offset - 4);
226  ffio_wfourcc(dyn_ctx, "Xing");
227  avio_wb32(dyn_ctx, 0x01 | 0x02 | 0x04 | 0x08); // frames / size / TOC / vbr scale
228 
229  mp3->size = mpah.frame_size;
230  mp3->want=1;
231  mp3->seen=0;
232  mp3->pos=0;
233 
234  avio_wb32(dyn_ctx, 0); // frames
235  avio_wb32(dyn_ctx, 0); // size
236 
237  // TOC
238  for (i = 0; i < XING_TOC_SIZE; i++)
239  avio_w8(dyn_ctx, (uint8_t)(255 * i / XING_TOC_SIZE));
240 
241  // vbr quality
242  // we write it, because some (broken) tools always expect it to be present
243  avio_wb32(dyn_ctx, 0);
244 
245  // encoder short version string
246  if (enc) {
247  uint8_t encoder_str[9] = { 0 };
248  if ( strlen(enc->value) > sizeof(encoder_str)
249  && !strcmp("Lavc libmp3lame", enc->value)) {
250  memcpy(encoder_str, "Lavf lame", 9);
251  } else
252  memcpy(encoder_str, enc->value, FFMIN(strlen(enc->value), sizeof(encoder_str)));
253 
254  avio_write(dyn_ctx, encoder_str, sizeof(encoder_str));
255  } else
256  avio_write(dyn_ctx, "Lavf\0\0\0\0\0", 9);
257 
258  avio_w8(dyn_ctx, 0); // tag revision 0 / unknown vbr method
259  avio_w8(dyn_ctx, 0); // unknown lowpass filter value
260  ffio_fill(dyn_ctx, 0, 8); // empty replaygain fields
261  avio_w8(dyn_ctx, 0); // unknown encoding flags
262  avio_w8(dyn_ctx, 0); // unknown abr/minimal bitrate
263  avio_wb24(dyn_ctx, 0); // empty encoder delay/padding
264 
265  avio_w8(dyn_ctx, 0); // misc
266  avio_w8(dyn_ctx, 0); // mp3gain
267  avio_wb16(dyn_ctx, 0); // preset
268 
269  // audio length and CRCs (will be updated later)
270  avio_wb32(dyn_ctx, 0); // music length
271  avio_wb16(dyn_ctx, 0); // music crc
272  avio_wb16(dyn_ctx, 0); // tag crc
273 
274  ffio_fill(dyn_ctx, 0, mpah.frame_size - bytes_needed);
275 
276  mp3->xing_frame_size = avio_close_dyn_buf(dyn_ctx, &mp3->xing_frame);
277  mp3->xing_frame_offset = avio_tell(s->pb);
278  avio_write(s->pb, mp3->xing_frame, mp3->xing_frame_size);
279 
280  mp3->audio_size = mp3->xing_frame_size;
281 
282  return 0;
283 }
284 
285 /*
286  * Add a frame to XING data.
287  * Following lame's "VbrTag.c".
288  */
290 {
291  int i;
292 
293  mp3->frames++;
294  mp3->seen++;
295  mp3->size += pkt->size;
296 
297  if (mp3->want == mp3->seen) {
298  mp3->bag[mp3->pos] = mp3->size;
299 
300  if (XING_NUM_BAGS == ++mp3->pos) {
301  /* shrink table to half size by throwing away each second bag. */
302  for (i = 1; i < XING_NUM_BAGS; i += 2)
303  mp3->bag[i >> 1] = mp3->bag[i];
304 
305  /* double wanted amount per bag. */
306  mp3->want *= 2;
307  /* adjust current position to half of table size. */
308  mp3->pos = XING_NUM_BAGS / 2;
309  }
310 
311  mp3->seen = 0;
312  }
313 }
314 
316 {
317  MP3Context *mp3 = s->priv_data;
318 
319  if (pkt->data && pkt->size >= 4) {
320  MPADecodeHeader mpah;
321  int ret;
322  int av_unused base;
323  uint32_t h;
324 
325  h = AV_RB32(pkt->data);
326  ret = avpriv_mpegaudio_decode_header(&mpah, h);
327  if (ret >= 0) {
328  if (!mp3->initial_bitrate)
329  mp3->initial_bitrate = mpah.bit_rate;
330  if ((mpah.bit_rate == 0) || (mp3->initial_bitrate != mpah.bit_rate))
331  mp3->has_variable_bitrate = 1;
332  } else {
333  av_log(s, AV_LOG_WARNING, "Audio packet of size %d (starting with %08"PRIX32"...) "
334  "is invalid, writing it anyway.\n", pkt->size, h);
335  }
336 
337 #ifdef FILTER_VBR_HEADERS
338  /* filter out XING and INFO headers. */
339  base = 4 + xing_offtbl[mpah.lsf == 1][mpah.nb_channels == 1];
340 
341  if (base + 4 <= pkt->size) {
342  uint32_t v = AV_RB32(pkt->data + base);
343 
344  if (MKBETAG('X','i','n','g') == v || MKBETAG('I','n','f','o') == v)
345  return 0;
346  }
347 
348  /* filter out VBRI headers. */
349  base = 4 + 32;
350 
351  if (base + 4 <= pkt->size && MKBETAG('V','B','R','I') == AV_RB32(pkt->data + base))
352  return 0;
353 #endif
354 
355  if (mp3->xing_offset) {
356  uint8_t *side_data = NULL;
357  int side_data_size = 0;
358 
359  mp3_xing_add_frame(mp3, pkt);
360  mp3->audio_size += pkt->size;
362  mp3->audio_crc, pkt->data, pkt->size);
363 
364  side_data = av_packet_get_side_data(pkt,
366  &side_data_size);
367  if (side_data && side_data_size >= 10) {
368  mp3->padding = FFMAX(AV_RL32(side_data + 4) + 528 + 1, 0);
369  if (!mp3->delay)
370  mp3->delay = FFMAX(AV_RL32(side_data) - 528 - 1, 0);
371  } else {
372  mp3->padding = 0;
373  }
374  }
375  }
376 
377  return ff_raw_write_packet(s, pkt);
378 }
379 
381 {
382  MP3Context *mp3 = s->priv_data;
383  AVPacket pkt;
384  int ret = 0, write = 1;
385 
387  mp3_write_xing(s);
388 
389  while (mp3->queue) {
390  ff_packet_list_get(&mp3->queue, &mp3->queue_end, &pkt);
391  if (write && (ret = mp3_write_audio_packet(s, &pkt)) < 0)
392  write = 0;
393  av_packet_unref(&pkt);
394  }
395  return ret;
396 }
397 
399 {
400  MP3Context *mp3 = s->priv_data;
401  AVReplayGain *rg;
402  uint16_t tag_crc;
403  uint8_t *toc;
404  int i, rg_size;
405  int64_t old_pos = avio_tell(s->pb);
406 
407  /* replace "Xing" identification string with "Info" for CBR files. */
408  if (!mp3->has_variable_bitrate)
409  AV_WL32(mp3->xing_frame + mp3->xing_offset, MKTAG('I', 'n', 'f', 'o'));
410 
411  AV_WB32(mp3->xing_frame + mp3->xing_offset + 8, mp3->frames);
412  AV_WB32(mp3->xing_frame + mp3->xing_offset + 12, mp3->size);
413 
414  toc = mp3->xing_frame + mp3->xing_offset + 16;
415  toc[0] = 0; // first toc entry has to be zero.
416  for (i = 1; i < XING_TOC_SIZE; ++i) {
417  int j = i * mp3->pos / XING_TOC_SIZE;
418  int seek_point = 256LL * mp3->bag[j] / mp3->size;
419  toc[i] = FFMIN(seek_point, 255);
420  }
421 
422  /* write replaygain */
424  &rg_size);
425  if (rg && rg_size >= sizeof(*rg)) {
426  uint16_t val;
427 
428  AV_WB32(mp3->xing_frame + mp3->xing_offset + 131,
429  av_rescale(rg->track_peak, 1 << 23, 100000));
430 
431  if (rg->track_gain != INT32_MIN) {
432  val = FFABS(rg->track_gain / 10000) & ((1 << 9) - 1);
433  val |= (rg->track_gain < 0) << 9;
434  val |= 1 << 13;
435  AV_WB16(mp3->xing_frame + mp3->xing_offset + 135, val);
436  }
437 
438  if (rg->album_gain != INT32_MIN) {
439  val = FFABS(rg->album_gain / 10000) & ((1 << 9) - 1);
440  val |= (rg->album_gain < 0) << 9;
441  val |= 1 << 14;
442  AV_WB16(mp3->xing_frame + mp3->xing_offset + 137, val);
443  }
444  }
445 
446  /* write encoder delay/padding */
447  if (mp3->delay >= 1 << 12) {
448  mp3->delay = (1 << 12) - 1;
449  av_log(s, AV_LOG_WARNING, "Too many samples of initial padding.\n");
450  }
451  if (mp3->padding >= 1 << 12) {
452  mp3->padding = (1 << 12) - 1;
453  av_log(s, AV_LOG_WARNING, "Too many samples of trailing padding.\n");
454  }
455  AV_WB24(mp3->xing_frame + mp3->xing_offset + 141, (mp3->delay << 12) + mp3->padding);
456 
457  AV_WB32(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 8, mp3->audio_size);
458  AV_WB16(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 4, mp3->audio_crc);
459 
460  tag_crc = av_crc(av_crc_get_table(AV_CRC_16_ANSI_LE), 0, mp3->xing_frame, 190);
461  AV_WB16(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 2, tag_crc);
462 
463  avio_seek(s->pb, mp3->xing_frame_offset, SEEK_SET);
464  avio_write(s->pb, mp3->xing_frame, mp3->xing_frame_size);
465  avio_seek(s->pb, old_pos, SEEK_SET);
466 }
467 
469 {
470  uint8_t buf[ID3v1_TAG_SIZE];
471  MP3Context *mp3 = s->priv_data;
472 
473  if (mp3->pics_to_write) {
474  av_log(s, AV_LOG_WARNING, "No packets were sent for some of the "
475  "attached pictures.\n");
476  mp3_queue_flush(s);
477  }
478 
479  /* write the id3v1 tag */
480  if (mp3->write_id3v1 && id3v1_create_tag(s, buf) > 0) {
481  avio_write(s->pb, buf, ID3v1_TAG_SIZE);
482  }
483 
484  if (mp3->xing_offset)
485  mp3_update_xing(s);
486 
487  return 0;
488 }
489 
490 static int query_codec(enum AVCodecID id, int std_compliance)
491 {
493  while(cm->id != AV_CODEC_ID_NONE) {
494  if(id == cm->id)
495  return MKTAG('A', 'P', 'I', 'C');
496  cm++;
497  }
498  return -1;
499 }
500 
501 static const AVOption options[] = {
502  { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
503  offsetof(MP3Context, id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 0, 4, AV_OPT_FLAG_ENCODING_PARAM},
504  { "write_id3v1", "Enable ID3v1 writing. ID3v1 tags are written in UTF-8 which may not be supported by most software.",
505  offsetof(MP3Context, write_id3v1), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
506  { "write_xing", "Write the Xing header containing file duration.",
507  offsetof(MP3Context, write_xing), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
508  { NULL },
509 };
510 
511 static const AVClass mp3_muxer_class = {
512  .class_name = "MP3 muxer",
513  .item_name = av_default_item_name,
514  .option = options,
515  .version = LIBAVUTIL_VERSION_INT,
516 };
517 
519 {
520  MP3Context *mp3 = s->priv_data;
521 
522  if (pkt->stream_index == mp3->audio_stream_idx) {
523  if (mp3->pics_to_write) {
524  /* buffer audio packets until we get all the pictures */
525  int ret = ff_packet_list_put(&mp3->queue, &mp3->queue_end, pkt, FF_PACKETLIST_FLAG_REF_PACKET);
526 
527  if (ret < 0) {
528  av_log(s, AV_LOG_WARNING, "Not enough memory to buffer audio. Skipping picture streams\n");
529  mp3->pics_to_write = 0;
530  mp3_queue_flush(s);
531  return mp3_write_audio_packet(s, pkt);
532  }
533  } else
534  return mp3_write_audio_packet(s, pkt);
535  } else {
536  int ret;
537 
538  /* warn only once for each stream */
539  if (s->streams[pkt->stream_index]->nb_frames == 1) {
540  av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
541  " ignoring.\n", pkt->stream_index);
542  }
543  if (!mp3->pics_to_write || s->streams[pkt->stream_index]->nb_frames >= 1)
544  return 0;
545 
546  if ((ret = ff_id3v2_write_apic(s, &mp3->id3, pkt)) < 0)
547  return ret;
548  mp3->pics_to_write--;
549 
550  /* flush the buffered audio packets */
551  if (!mp3->pics_to_write &&
552  (ret = mp3_queue_flush(s)) < 0)
553  return ret;
554  }
555 
556  return 0;
557 }
558 
559 /**
560  * Write an ID3v2 header at beginning of stream
561  */
562 
563 static int mp3_init(struct AVFormatContext *s)
564 {
565  MP3Context *mp3 = s->priv_data;
566  int i;
567 
568  if (mp3->id3v2_version &&
569  mp3->id3v2_version != 3 &&
570  mp3->id3v2_version != 4) {
571  av_log(s, AV_LOG_ERROR, "Invalid ID3v2 version requested: %d. Only "
572  "3, 4 or 0 (disabled) are allowed.\n", mp3->id3v2_version);
573  return AVERROR(EINVAL);
574  }
575 
576  /* check the streams -- we want exactly one audio and arbitrary number of
577  * video (attached pictures) */
578  mp3->audio_stream_idx = -1;
579  for (i = 0; i < s->nb_streams; i++) {
580  AVStream *st = s->streams[i];
581  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
582  if (mp3->audio_stream_idx >= 0 || st->codecpar->codec_id != AV_CODEC_ID_MP3) {
583  av_log(s, AV_LOG_ERROR, "Invalid audio stream. Exactly one MP3 "
584  "audio stream is required.\n");
585  return AVERROR(EINVAL);
586  }
587  mp3->audio_stream_idx = i;
588  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO) {
589  av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in MP3.\n");
590  return AVERROR(EINVAL);
591  }
592  }
593  if (mp3->audio_stream_idx < 0) {
594  av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
595  return AVERROR(EINVAL);
596  }
597  mp3->pics_to_write = s->nb_streams - 1;
598 
599  if (mp3->pics_to_write && !mp3->id3v2_version) {
600  av_log(s, AV_LOG_ERROR, "Attached pictures were requested, but the "
601  "ID3v2 header is disabled.\n");
602  return AVERROR(EINVAL);
603  }
604 
605  return 0;
606 }
607 
608 static int mp3_write_header(struct AVFormatContext *s)
609 {
610  MP3Context *mp3 = s->priv_data;
611  int ret;
612 
613  if (mp3->id3v2_version) {
615  ret = ff_id3v2_write_metadata(s, &mp3->id3);
616  if (ret < 0)
617  return ret;
618  }
619 
620  if (!mp3->pics_to_write) {
621  if (mp3->id3v2_version)
623  mp3_write_xing(s);
624  }
625 
626  return 0;
627 }
628 
629 static void mp3_deinit(struct AVFormatContext *s)
630 {
631  MP3Context *mp3 = s->priv_data;
632 
633  ff_packet_list_free(&mp3->queue, &mp3->queue_end);
634  av_freep(&mp3->xing_frame);
635 }
636 
638  .name = "mp3",
639  .long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"),
640  .mime_type = "audio/mpeg",
641  .extensions = "mp3",
642  .priv_data_size = sizeof(MP3Context),
643  .audio_codec = AV_CODEC_ID_MP3,
644  .video_codec = AV_CODEC_ID_PNG,
645  .init = mp3_init,
649  .deinit = mp3_deinit,
652  .priv_class = &mp3_muxer_class,
653 };
#define MPA_STEREO
Definition: mpegaudio.h:46
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:701
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
#define XING_NUM_BAGS
Definition: mp3enc.c:92
int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer)
Return the written size and a pointer to the buffer.
Definition: aviobuf.c:1401
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:441
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:315
int64_t xing_frame_offset
Definition: mp3enc.c:113
#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:420
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
uint32_t pos
Definition: mp3enc.c:121
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int size
Definition: packet.h:356
#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:241
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
const char * key
static AVPacket pkt
static void error(const char *err)
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1356
mpeg audio layer common tables.
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
uint64_t bag[XING_NUM_BAGS]
Definition: mp3enc.c:122
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:1351
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:398
int32_t size
Definition: mp3enc.c:118
static int mp3_write_trailer(struct AVFormatContext *s)
Definition: mp3enc.c:468
uint8_t
int delay
Definition: mp3enc.c:125
AVOptions.
#define AV_RB32
Definition: intreadwrite.h:130
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:5498
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
#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:733
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: packet.h:355
int avpriv_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
uint32_t tag
Definition: movenc.c:1532
static const uint8_t xing_offtbl[2][2]
Definition: mp3enc.c:137
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
static const uint8_t header[24]
Definition: sdr2.c:67
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:213
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:58
channels
Definition: aptx.h:33
#define AV_WB16(p, v)
Definition: intreadwrite.h:405
AVCRC audio_crc
Definition: mp3enc.c:109
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: codec_par.h:89
AVPacketList * queue_end
Definition: mp3enc.c:134
#define U(x)
Definition: vp56_arith.h:37
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#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
static const uint16_t mask[17]
Definition: lzw.c:38
#define AVERROR(e)
Definition: error.h:43
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:353
#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: codec_id.h:411
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
simple assert() macros that are a bit more flexible than ISO C assert().
uint32_t want
Definition: mp3enc.c:119
#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:123
const CodecMime ff_id3v2_mime_tags[]
Definition: id3v2.c:131
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
static int mp3_write_xing(AVFormatContext *s)
Definition: mp3enc.c:142
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:330
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:199
int id3v2_version
Definition: mp3enc.c:100
#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 mp3_init(struct AVFormatContext *s)
Write an ID3v2 header at beginning of stream.
Definition: mp3enc.c:563
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:465
const char * name
Definition: avformat.h:500
static int query_codec(enum AVCodecID id, int std_compliance)
Definition: mp3enc.c:490
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:134
#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
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:940
int padding
Definition: mp3enc.c:126
int write_id3v1
Definition: mp3enc.c:101
#define FF_ARRAY_ELEMS(a)
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
int pics_to_write
Definition: mp3enc.c:131
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:462
static const AVClass mp3_muxer_class
Definition: mp3enc.c:511
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int has_variable_bitrate
Definition: mp3enc.c:124
int audio_stream_idx
Definition: mp3enc.c:129
int xing_offset
Definition: mp3enc.c:115
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int32_t frames
Definition: mp3enc.c:117
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:191
static const AVOption options[]
Definition: mp3enc.c:501
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
int xing_frame_size
Definition: mp3enc.c:107
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: packet.h:156
uint8_t * xing_frame
Definition: mp3enc.c:106
#define MPA_MONO
Definition: mpegaudio.h:49
void ff_packet_list_free(AVPacketList **head, AVPacketList **tail)
Wipe the list and unref all the packets in it.
Definition: utils.c:1423
#define XING_SIZE
Definition: mp3enc.c:95
uint32_t audio_size
Definition: mp3enc.c:110
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:453
#define flags(name, subs,...)
Definition: cbs_av1.c:564
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: packet.h:99
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:351
int write_xing
Definition: mp3enc.c:102
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: codec_par.h:170
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:1553
static int mp3_queue_flush(AVFormatContext *s)
Definition: mp3enc.c:380
Main libavformat public API header.
AVOutputFormat ff_mp3_muxer
Definition: mp3enc.c:637
static int mp3_write_header(struct AVFormatContext *s)
Definition: mp3enc.c:608
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:927
#define MKBETAG(a, b, c, d)
Definition: common.h:407
static void mp3_deinit(struct AVFormatContext *s)
Definition: mp3enc.c:629
#define XING_TOC_SIZE
Definition: mp3enc.c:93
char * value
Definition: dict.h:87
void * priv_data
Format private data.
Definition: avformat.h:1379
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
int channels
Audio only.
Definition: codec_par.h:166
#define ID3v1_TAG_SIZE
Definition: id3v1.h:27
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:375
#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:1023
int stream_index
Definition: packet.h:357
static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
Definition: mp3enc.c:49
#define MKTAG(a, b, c, d)
Definition: common.h:406
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:518
#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
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:332
uint32_t AVCRC
Definition: crc.h:47
ID3v2EncContext id3
Definition: mp3enc.c:99
#define av_unused
Definition: attributes.h:131
static void mp3_xing_add_frame(MP3Context *mp3, AVPacket *pkt)
Definition: mp3enc.c:289
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
uint32_t seen
Definition: mp3enc.c:120