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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 || !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 %08X...) "
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  AVPacketList *pktl;
373  int ret = 0, write = 1;
374 
376  mp3_write_xing(s);
377 
378  while ((pktl = mp3->queue)) {
379  if (write && (ret = mp3_write_audio_packet(s, &pktl->pkt)) < 0)
380  write = 0;
381  av_packet_unref(&pktl->pkt);
382  mp3->queue = pktl->next;
383  av_freep(&pktl);
384  }
385  mp3->queue_end = NULL;
386  return ret;
387 }
388 
390 {
391  MP3Context *mp3 = s->priv_data;
392  AVReplayGain *rg;
393  uint16_t tag_crc;
394  uint8_t *toc;
395  int i, rg_size;
396 
397  /* replace "Xing" identification string with "Info" for CBR files. */
398  if (!mp3->has_variable_bitrate)
399  AV_WL32(mp3->xing_frame + mp3->xing_offset, MKTAG('I', 'n', 'f', 'o'));
400 
401  AV_WB32(mp3->xing_frame + mp3->xing_offset + 8, mp3->frames);
402  AV_WB32(mp3->xing_frame + mp3->xing_offset + 12, mp3->size);
403 
404  toc = mp3->xing_frame + mp3->xing_offset + 16;
405  toc[0] = 0; // first toc entry has to be zero.
406  for (i = 1; i < XING_TOC_SIZE; ++i) {
407  int j = i * mp3->pos / XING_TOC_SIZE;
408  int seek_point = 256LL * mp3->bag[j] / mp3->size;
409  toc[i] = FFMIN(seek_point, 255);
410  }
411 
412  /* write replaygain */
414  &rg_size);
415  if (rg && rg_size >= sizeof(*rg)) {
416  uint16_t val;
417 
418  AV_WB32(mp3->xing_frame + mp3->xing_offset + 131,
419  av_rescale(rg->track_peak, 1 << 23, 100000));
420 
421  if (rg->track_gain != INT32_MIN) {
422  val = FFABS(rg->track_gain / 10000) & ((1 << 9) - 1);
423  val |= (rg->track_gain < 0) << 9;
424  val |= 1 << 13;
425  AV_WB16(mp3->xing_frame + mp3->xing_offset + 135, val);
426  }
427 
428  if (rg->album_gain != INT32_MIN) {
429  val = FFABS(rg->album_gain / 10000) & ((1 << 9) - 1);
430  val |= (rg->album_gain < 0) << 9;
431  val |= 1 << 14;
432  AV_WB16(mp3->xing_frame + mp3->xing_offset + 137, val);
433  }
434  }
435 
436  /* write encoder delay/padding */
437  if (mp3->delay >= 1 << 12) {
438  mp3->delay = (1 << 12) - 1;
439  av_log(s, AV_LOG_WARNING, "Too many samples of initial padding.\n");
440  }
441  if (mp3->padding >= 1 << 12) {
442  mp3->padding = (1 << 12) - 1;
443  av_log(s, AV_LOG_WARNING, "Too many samples of trailing padding.\n");
444  }
445  AV_WB24(mp3->xing_frame + mp3->xing_offset + 141, (mp3->delay << 12) + mp3->padding);
446 
447  AV_WB32(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 8, mp3->audio_size);
448  AV_WB16(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 4, mp3->audio_crc);
449 
450  tag_crc = av_crc(av_crc_get_table(AV_CRC_16_ANSI_LE), 0, mp3->xing_frame, 190);
451  AV_WB16(mp3->xing_frame + mp3->xing_offset + XING_SIZE - 2, tag_crc);
452 
453  avio_seek(s->pb, mp3->xing_frame_offset, SEEK_SET);
454  avio_write(s->pb, mp3->xing_frame, mp3->xing_frame_size);
455  avio_seek(s->pb, 0, SEEK_END);
456 }
457 
459 {
461  MP3Context *mp3 = s->priv_data;
462 
463  if (mp3->pics_to_write) {
464  av_log(s, AV_LOG_WARNING, "No packets were sent for some of the "
465  "attached pictures.\n");
466  mp3_queue_flush(s);
467  }
468 
469  /* write the id3v1 tag */
470  if (mp3->write_id3v1 && id3v1_create_tag(s, buf) > 0) {
471  avio_write(s->pb, buf, ID3v1_TAG_SIZE);
472  }
473 
474  if (mp3->xing_offset)
475  mp3_update_xing(s);
476 
477  av_freep(&mp3->xing_frame);
478 
479  return 0;
480 }
481 
482 static int query_codec(enum AVCodecID id, int std_compliance)
483 {
485  while(cm->id != AV_CODEC_ID_NONE) {
486  if(id == cm->id)
487  return MKTAG('A', 'P', 'I', 'C');
488  cm++;
489  }
490  return -1;
491 }
492 
493 static const AVOption options[] = {
494  { "id3v2_version", "Select ID3v2 version to write. Currently 3 and 4 are supported.",
495  offsetof(MP3Context, id3v2_version), AV_OPT_TYPE_INT, {.i64 = 4}, 0, 4, AV_OPT_FLAG_ENCODING_PARAM},
496  { "write_id3v1", "Enable ID3v1 writing. ID3v1 tags are written in UTF-8 which may not be supported by most software.",
497  offsetof(MP3Context, write_id3v1), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
498  { "write_xing", "Write the Xing header containing file duration.",
499  offsetof(MP3Context, write_xing), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
500  { NULL },
501 };
502 
503 static const AVClass mp3_muxer_class = {
504  .class_name = "MP3 muxer",
505  .item_name = av_default_item_name,
506  .option = options,
507  .version = LIBAVUTIL_VERSION_INT,
508 };
509 
511 {
512  MP3Context *mp3 = s->priv_data;
513 
514  if (pkt->stream_index == mp3->audio_stream_idx) {
515  if (mp3->pics_to_write) {
516  /* buffer audio packets until we get all the pictures */
517  AVPacketList *pktl = av_mallocz(sizeof(*pktl));
518  int ret;
519  if (!pktl) {
520  av_log(s, AV_LOG_WARNING, "Not enough memory to buffer audio. Skipping picture streams\n");
521  mp3->pics_to_write = 0;
522  mp3_queue_flush(s);
523  return mp3_write_audio_packet(s, pkt);
524  }
525 
526  ret = av_copy_packet(&pktl->pkt, pkt);
527  if (ret < 0) {
528  av_freep(&pktl);
529  return ret;
530  }
531 
532  if (mp3->queue_end)
533  mp3->queue_end->next = pktl;
534  else
535  mp3->queue = pktl;
536  mp3->queue_end = pktl;
537  } else
538  return mp3_write_audio_packet(s, pkt);
539  } else {
540  int ret;
541 
542  /* warn only once for each stream */
543  if (s->streams[pkt->stream_index]->nb_frames == 1) {
544  av_log(s, AV_LOG_WARNING, "Got more than one picture in stream %d,"
545  " ignoring.\n", pkt->stream_index);
546  }
547  if (!mp3->pics_to_write || s->streams[pkt->stream_index]->nb_frames >= 1)
548  return 0;
549 
550  if ((ret = ff_id3v2_write_apic(s, &mp3->id3, pkt)) < 0)
551  return ret;
552  mp3->pics_to_write--;
553 
554  /* flush the buffered audio packets */
555  if (!mp3->pics_to_write &&
556  (ret = mp3_queue_flush(s)) < 0)
557  return ret;
558  }
559 
560  return 0;
561 }
562 
563 /**
564  * Write an ID3v2 header at beginning of stream
565  */
566 
567 static int mp3_write_header(struct AVFormatContext *s)
568 {
569  MP3Context *mp3 = s->priv_data;
570  int ret, i;
571 
572  if (mp3->id3v2_version &&
573  mp3->id3v2_version != 3 &&
574  mp3->id3v2_version != 4) {
575  av_log(s, AV_LOG_ERROR, "Invalid ID3v2 version requested: %d. Only "
576  "3, 4 or 0 (disabled) are allowed.\n", mp3->id3v2_version);
577  return AVERROR(EINVAL);
578  }
579 
580  /* check the streams -- we want exactly one audio and arbitrary number of
581  * video (attached pictures) */
582  mp3->audio_stream_idx = -1;
583  for (i = 0; i < s->nb_streams; i++) {
584  AVStream *st = s->streams[i];
585  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
586  if (mp3->audio_stream_idx >= 0 || st->codecpar->codec_id != AV_CODEC_ID_MP3) {
587  av_log(s, AV_LOG_ERROR, "Invalid audio stream. Exactly one MP3 "
588  "audio stream is required.\n");
589  return AVERROR(EINVAL);
590  }
591  mp3->audio_stream_idx = i;
592  } else if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO) {
593  av_log(s, AV_LOG_ERROR, "Only audio streams and pictures are allowed in MP3.\n");
594  return AVERROR(EINVAL);
595  }
596  }
597  if (mp3->audio_stream_idx < 0) {
598  av_log(s, AV_LOG_ERROR, "No audio stream present.\n");
599  return AVERROR(EINVAL);
600  }
601  mp3->pics_to_write = s->nb_streams - 1;
602 
603  if (mp3->pics_to_write && !mp3->id3v2_version) {
604  av_log(s, AV_LOG_ERROR, "Attached pictures were requested, but the "
605  "ID3v2 header is disabled.\n");
606  return AVERROR(EINVAL);
607  }
608 
609  if (mp3->id3v2_version) {
611  ret = ff_id3v2_write_metadata(s, &mp3->id3);
612  if (ret < 0)
613  return ret;
614  }
615 
616  if (!mp3->pics_to_write) {
617  if (mp3->id3v2_version)
619  mp3_write_xing(s);
620  }
621 
622  return 0;
623 }
624 
626  .name = "mp3",
627  .long_name = NULL_IF_CONFIG_SMALL("MP3 (MPEG audio layer 3)"),
628  .mime_type = "audio/mpeg",
629  .extensions = "mp3",
630  .priv_data_size = sizeof(MP3Context),
631  .audio_codec = AV_CODEC_ID_MP3,
632  .video_codec = AV_CODEC_ID_PNG,
638  .priv_class = &mp3_muxer_class,
639 };
#define MPA_STEREO
Definition: mpegaudio.h:45
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
const char * s
Definition: avisynth_c.h:768
Bytestream IO Context.
Definition: avio.h:147
#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:1280
AVOption.
Definition: opt.h:246
void ff_id3v2_start(ID3v2EncContext *id3, AVIOContext *pb, int id3v2_version, const char *magic)
Initialize an ID3v2 tag.
Definition: id3v2enc.c:152
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:326
uint32_t pos
Definition: mp3enc.c:110
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3981
int size
Definition: avcodec.h:1602
#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:230
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
static AVPacket pkt
int avio_open_dyn_buf(AVIOContext **s)
Open a write only memory stream.
Definition: aviobuf.c:1268
mpeg audio layer common tables.
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3973
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
Format I/O context.
Definition: avformat.h:1338
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:389
int32_t size
Definition: mp3enc.c:107
static int mp3_write_trailer(struct AVFormatContext *s)
Definition: mp3enc.c:458
uint8_t
int delay
Definition: mp3enc.c:114
AVOptions.
AVPacket pkt
Definition: avformat.h:1948
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:5095
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:1406
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:1601
int avpriv_mpegaudio_decode_header(MPADecodeHeader *s, uint32_t header)
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1412
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:511
static const uint8_t header[24]
Definition: sdr2.c:67
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:204
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:66
#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:36
#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:4010
AVPacketList * queue_end
Definition: mp3enc.c:123
#define U(x)
Definition: vp56_arith.h:37
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:191
#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:1554
static const uint16_t mask[17]
Definition: lzw.c:38
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:517
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3977
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:109
#define FFMAX(a, b)
Definition: common.h:94
static void error(const char *err)
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:129
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1394
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:243
int ff_id3v2_write_metadata(AVFormatContext *s, ID3v2EncContext *id3)
Convert and write all global metadata from s into an ID3v2 tag.
Definition: id3v2enc.c:239
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:190
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:464
const char * name
Definition: avformat.h:524
static int query_codec(enum AVCodecID id, int std_compliance)
Definition: mp3enc.c:482
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:357
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
int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: rawenc.c:29
AVDictionary * metadata
Definition: avformat.h:958
int padding
Definition: mp3enc.c:115
int write_id3v1
Definition: mp3enc.c:90
#define FF_ARRAY_ELEMS(a)
int metadata_header_padding
Number of bytes to be written as padding in a metadata header.
Definition: avformat.h:1814
Stream structure.
Definition: avformat.h:889
int pics_to_write
Definition: mp3enc.c:120
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:486
static const AVClass mp3_muxer_class
Definition: mp3enc.c:503
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:1380
int32_t frames
Definition: mp3enc.c:106
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:182
static const AVOption options[]
Definition: mp3enc.c:493
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:568
int av_copy_packet(AVPacket *dst, const AVPacket *src)
Copy packet, including contents.
Definition: avpacket.c:264
void * buf
Definition: avisynth_c.h:690
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost)
Definition: ffmpeg.c:650
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:1473
uint8_t * xing_frame
Definition: mp3enc.c:95
#define MPA_MONO
Definition: mpegaudio.h:48
#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:452
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: avcodec.h:1416
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:257
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:343
int sample_rate
Audio only.
Definition: avcodec.h:4091
MPEG Audio header decoder.
static int mp3_queue_flush(AVFormatContext *s)
Definition: mp3enc.c:369
Main libavformat public API header.
struct AVPacketList * next
Definition: avformat.h:1949
AVOutputFormat ff_mp3_muxer
Definition: mp3enc.c:625
static int mp3_write_header(struct AVFormatContext *s)
Write an ID3v2 header at beginning of stream.
Definition: mp3enc.c:567
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:945
#define MKBETAG(a, b, c, d)
Definition: common.h:343
#define XING_TOC_SIZE
Definition: mp3enc.c:82
char * value
Definition: dict.h:87
void * priv_data
Format private data.
Definition: avformat.h:1366
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:344
int channels
Audio only.
Definition: avcodec.h:4087
#define ID3v1_TAG_SIZE
Definition: id3v1.h:27
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:354
#define av_freep(p)
uint8_t * av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
Definition: avpacket.c:339
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
Definition: avformat.h:1241
int stream_index
Definition: avcodec.h:1603
static int id3v1_create_tag(AVFormatContext *s, uint8_t *buf)
Definition: mp3enc.c:48
#define MKTAG(a, b, c, d)
Definition: common.h:342
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:510
#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:1578
uint32_t AVCRC
Definition: crc.h:47
ID3v2EncContext id3
Definition: mp3enc.c:88
#define av_unused
Definition: attributes.h:126
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