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avienc.c
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1 /*
2  * AVI muxer
3  * Copyright (c) 2000 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 //#define DEBUG
23 
24 #include "avformat.h"
25 #include "internal.h"
26 #include "avi.h"
27 #include "avio_internal.h"
28 #include "riff.h"
29 #include "mpegts.h"
30 #include "libavformat/avlanguage.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/dict.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/timestamp.h"
37 #include "libavutil/opt.h"
38 #include "libavutil/pixdesc.h"
39 #include "libavcodec/raw.h"
40 
41 /*
42  * TODO:
43  * - fill all fields if non streamed (nb_frames for example)
44  */
45 
46 typedef struct AVIIentry {
47  unsigned int flags, pos, len;
48 } AVIIentry;
49 
50 #define AVI_INDEX_CLUSTER_SIZE 16384
51 
52 typedef struct AVIIndex {
53  int64_t indx_start;
55  int entry;
59 } AVIIndex;
60 
61 typedef struct AVIContext {
62  const AVClass *class;
64  int64_t frames_hdr_all;
65  int riff_id;
67 } AVIContext;
68 
69 typedef struct AVIStream {
70  int64_t frames_hdr_strm;
73  int entry;
74  int max_size;
76 
77  int64_t last_dts;
78 
80 } AVIStream;
81 
83 
84 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
85 {
86  int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
87  int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
88  return &idx->cluster[cl][id];
89 }
90 
92  const char *riff_tag, const char *list_tag)
93 {
94  AVIContext *avi = s->priv_data;
95  int64_t loff;
96  int i;
97 
98  avi->riff_id++;
99  for (i = 0; i < s->nb_streams; i++) {
100  AVIStream *avist = s->streams[i]->priv_data;
102  avist->indexes.entry = 0;
103  }
104 
105  avi->riff_start = ff_start_tag(pb, "RIFF");
106  ffio_wfourcc(pb, riff_tag);
107  loff = ff_start_tag(pb, "LIST");
108  ffio_wfourcc(pb, list_tag);
109  return loff;
110 }
111 
112 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
113 {
114  tag[0] = '0' + index / 10;
115  tag[1] = '0' + index % 10;
116  if (type == AVMEDIA_TYPE_VIDEO) {
117  tag[2] = 'd';
118  tag[3] = 'c';
119  } else if (type == AVMEDIA_TYPE_SUBTITLE) {
120  // note: this is not an official code
121  tag[2] = 's';
122  tag[3] = 'b';
123  } else {
124  tag[2] = 'w';
125  tag[3] = 'b';
126  }
127  tag[4] = '\0';
128  return tag;
129 }
130 
131 static int avi_write_counters(AVFormatContext *s, int riff_id)
132 {
133  AVIOContext *pb = s->pb;
134  AVIContext *avi = s->priv_data;
135  int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
136  int64_t file_size;
137  AVCodecContext *stream;
138 
139  file_size = avio_tell(pb);
140  for (n = 0; n < s->nb_streams; n++) {
141  AVIStream *avist = s->streams[n]->priv_data;
142 
143  av_assert0(avist->frames_hdr_strm);
144  stream = s->streams[n]->codec;
145  avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
146  ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
147  if (au_ssize == 0)
148  avio_wl32(pb, avist->packet_count);
149  else
150  avio_wl32(pb, avist->audio_strm_length / au_ssize);
151  if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
152  nb_frames = FFMAX(nb_frames, avist->packet_count);
153  }
154  if (riff_id == 1) {
156  avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
157  avio_wl32(pb, nb_frames);
158  }
159  avio_seek(pb, file_size, SEEK_SET);
160 
161  return 0;
162 }
163 
164 static void write_odml_master(AVFormatContext *s, int stream_index)
165 {
166  AVIOContext *pb = s->pb;
167  AVStream *st = s->streams[stream_index];
168  AVCodecContext *enc = st->codec;
169  AVIStream *avist = st->priv_data;
170  unsigned char tag[5];
171  int j;
172 
173  /* Starting to lay out AVI OpenDML master index.
174  * We want to make it JUNK entry for now, since we'd
175  * like to get away without making AVI an OpenDML one
176  * for compatibility reasons. */
177  avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
178  avio_wl16(pb, 4); /* wLongsPerEntry */
179  avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
180  avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
181  avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
182  ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
183  /* dwChunkId */
184  avio_wl64(pb, 0); /* dwReserved[3] */
185  avio_wl32(pb, 0); /* Must be 0. */
186  for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
187  avio_wl64(pb, 0);
188  ff_end_tag(pb, avist->indexes.indx_start);
189 }
190 
192 {
193  AVIContext *avi = s->priv_data;
194  AVIOContext *pb = s->pb;
195  int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
196  AVCodecContext *video_enc;
198  int64_t list1, list2, strh, strf;
199  AVDictionaryEntry *t = NULL;
200  int padding;
201 
202  if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
203  av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
205  return AVERROR(EINVAL);
206  }
207 
208  for (n = 0; n < s->nb_streams; n++) {
209  s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
210  if (!s->streams[n]->priv_data)
211  return AVERROR(ENOMEM);
212  }
213 
214  /* header list */
215  avi->riff_id = 0;
216  list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
217 
218  /* avi header */
219  ffio_wfourcc(pb, "avih");
220  avio_wl32(pb, 14 * 4);
221  bitrate = 0;
222 
223  video_enc = NULL;
224  for (n = 0; n < s->nb_streams; n++) {
225  AVCodecContext *codec = s->streams[n]->codec;
226  bitrate += codec->bit_rate;
227  if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
228  video_enc = codec;
229  video_st = s->streams[n];
230  }
231  }
232 
233  nb_frames = 0;
234 
235  // TODO: should be avg_frame_rate
236  if (video_st)
237  avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
238  video_st->time_base.den));
239  else
240  avio_wl32(pb, 0);
241  avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
242  avio_wl32(pb, 0); /* padding */
243  if (!pb->seekable)
244  avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
245  else
247  avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
248  avio_wl32(pb, nb_frames); /* nb frames, filled later */
249  avio_wl32(pb, 0); /* initial frame */
250  avio_wl32(pb, s->nb_streams); /* nb streams */
251  avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
252  if (video_enc) {
253  avio_wl32(pb, video_enc->width);
254  avio_wl32(pb, video_enc->height);
255  } else {
256  avio_wl32(pb, 0);
257  avio_wl32(pb, 0);
258  }
259  avio_wl32(pb, 0); /* reserved */
260  avio_wl32(pb, 0); /* reserved */
261  avio_wl32(pb, 0); /* reserved */
262  avio_wl32(pb, 0); /* reserved */
263 
264  /* stream list */
265  for (i = 0; i < n; i++) {
266  AVStream *st = s->streams[i];
267  AVCodecContext *enc = st->codec;
268  AVIStream *avist = st->priv_data;
269  list2 = ff_start_tag(pb, "LIST");
270  ffio_wfourcc(pb, "strl");
271 
272  /* stream generic header */
273  strh = ff_start_tag(pb, "strh");
274  switch (enc->codec_type) {
276  // XSUB subtitles behave like video tracks, other subtitles
277  // are not (yet) supported.
278  if (enc->codec_id != AV_CODEC_ID_XSUB) {
279  av_log(s, AV_LOG_ERROR,
280  "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
281  return AVERROR_PATCHWELCOME;
282  }
283  case AVMEDIA_TYPE_VIDEO:
284  ffio_wfourcc(pb, "vids");
285  break;
286  case AVMEDIA_TYPE_AUDIO:
287  ffio_wfourcc(pb, "auds");
288  break;
289 // case AVMEDIA_TYPE_TEXT:
290 // ffio_wfourcc(pb, "txts");
291 // break;
292  case AVMEDIA_TYPE_DATA:
293  ffio_wfourcc(pb, "dats");
294  break;
295  }
296  if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
297  enc->codec_id == AV_CODEC_ID_XSUB)
298  avio_wl32(pb, enc->codec_tag);
299  else
300  avio_wl32(pb, 1);
301  avio_wl32(pb, 0); /* flags */
302  avio_wl16(pb, 0); /* priority */
303  avio_wl16(pb, 0); /* language */
304  avio_wl32(pb, 0); /* initial frame */
305 
306  ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
307 
308  if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
309  && enc->codec_id != AV_CODEC_ID_XSUB
310  && au_byterate > 1000LL*au_scale) {
311  au_byterate = 600;
312  au_scale = 1;
313  }
314  avpriv_set_pts_info(st, 64, au_scale, au_byterate);
315  if (enc->codec_id == AV_CODEC_ID_XSUB)
316  au_scale = au_byterate = 0;
317 
318  avio_wl32(pb, au_scale); /* scale */
319  avio_wl32(pb, au_byterate); /* rate */
320 
321  avio_wl32(pb, 0); /* start */
322  /* remember this offset to fill later */
323  avist->frames_hdr_strm = avio_tell(pb);
324  if (!pb->seekable)
325  /* FIXME: this may be broken, but who cares */
327  else
328  avio_wl32(pb, 0); /* length, XXX: filled later */
329 
330  /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
331  if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
332  avio_wl32(pb, 1024 * 1024);
333  else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
334  avio_wl32(pb, 12 * 1024);
335  else
336  avio_wl32(pb, 0);
337  avio_wl32(pb, -1); /* quality */
338  avio_wl32(pb, au_ssize); /* sample size */
339  avio_wl32(pb, 0);
340  avio_wl16(pb, enc->width);
341  avio_wl16(pb, enc->height);
342  ff_end_tag(pb, strh);
343 
344  if (enc->codec_type != AVMEDIA_TYPE_DATA) {
345  int ret, flags;
346  enum AVPixelFormat pix_fmt;
347 
348  strf = ff_start_tag(pb, "strf");
349  switch (enc->codec_type) {
351  /* XSUB subtitles behave like video tracks, other subtitles
352  * are not (yet) supported. */
353  if (enc->codec_id != AV_CODEC_ID_XSUB)
354  break;
355  case AVMEDIA_TYPE_VIDEO:
356  /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
357  if ( !enc->codec_tag
358  && enc->codec_id == AV_CODEC_ID_RAWVIDEO
359  && enc->pix_fmt == AV_PIX_FMT_RGB555LE
360  && enc->bits_per_coded_sample == 15)
361  enc->bits_per_coded_sample = 16;
362  ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
364  enc->bits_per_coded_sample);
365  if ( !enc->codec_tag
366  && enc->codec_id == AV_CODEC_ID_RAWVIDEO
367  && enc->pix_fmt != pix_fmt
368  && enc->pix_fmt != AV_PIX_FMT_NONE)
369  av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
371  break;
372  case AVMEDIA_TYPE_AUDIO:
373  flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
374  if ((ret = ff_put_wav_header(pb, enc, flags)) < 0)
375  return ret;
376  break;
377  default:
378  av_log(s, AV_LOG_ERROR,
379  "Invalid or not supported codec type '%s' found in the input\n",
380  (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
381  return AVERROR(EINVAL);
382  }
383  ff_end_tag(pb, strf);
384  if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
385  ff_riff_write_info_tag(s->pb, "strn", t->value);
386  t = NULL;
387  }
388  if (enc->codec_id == AV_CODEC_ID_XSUB
389  && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
390  const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
391  t = NULL;
392  if (langstr) {
393  char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
394  if (!str)
395  return AVERROR(ENOMEM);
396  ff_riff_write_info_tag(s->pb, "strn", str);
397  av_free(str);
398  }
399  }
400  }
401 
402  if (pb->seekable) {
403  write_odml_master(s, i);
404  }
405 
406  if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
407  st->sample_aspect_ratio.num > 0 &&
408  st->sample_aspect_ratio.den > 0) {
409  int vprp = ff_start_tag(pb, "vprp");
411  (AVRational) { enc->width,
412  enc->height });
413  int num, den;
414  av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
415 
416  avio_wl32(pb, 0); // video format = unknown
417  avio_wl32(pb, 0); // video standard = unknown
418  // TODO: should be avg_frame_rate
419  avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
420  avio_wl32(pb, enc->width);
421  avio_wl32(pb, enc->height);
422  avio_wl16(pb, den);
423  avio_wl16(pb, num);
424  avio_wl32(pb, enc->width);
425  avio_wl32(pb, enc->height);
426  avio_wl32(pb, 1); // progressive FIXME
427 
428  avio_wl32(pb, enc->height);
429  avio_wl32(pb, enc->width);
430  avio_wl32(pb, enc->height);
431  avio_wl32(pb, enc->width);
432  avio_wl32(pb, 0);
433  avio_wl32(pb, 0);
434 
435  avio_wl32(pb, 0);
436  avio_wl32(pb, 0);
437  ff_end_tag(pb, vprp);
438  }
439 
440  ff_end_tag(pb, list2);
441  }
442 
443  if (pb->seekable) {
444  /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
445  avi->odml_list = ff_start_tag(pb, "JUNK");
446  ffio_wfourcc(pb, "odml");
447  ffio_wfourcc(pb, "dmlh");
448  avio_wl32(pb, 248);
449  for (i = 0; i < 248; i += 4)
450  avio_wl32(pb, 0);
451  ff_end_tag(pb, avi->odml_list);
452  }
453 
454  ff_end_tag(pb, list1);
455 
457 
458 
459  padding = s->metadata_header_padding;
460  if (padding < 0)
461  padding = 1016;
462 
463  /* some padding for easier tag editing */
464  if (padding) {
465  list2 = ff_start_tag(pb, "JUNK");
466  for (i = padding; i > 0; i -= 4)
467  avio_wl32(pb, 0);
468  ff_end_tag(pb, list2);
469  }
470 
471  avi->movi_list = ff_start_tag(pb, "LIST");
472  ffio_wfourcc(pb, "movi");
473 
474  avio_flush(pb);
475 
476  return 0;
477 }
478 
479 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
480 {
481  AVIOContext *pb = s->pb;
482  AVIContext *avi = s->priv_data;
483  AVIStream *avist = s->streams[stream_index]->priv_data;
484  int64_t pos;
485  int au_byterate, au_ssize, au_scale;
486 
487  avio_flush(pb);
488  pos = avio_tell(pb);
489 
490  /* Updating one entry in the AVI OpenDML master index */
491  avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
492  ffio_wfourcc(pb, "indx"); /* enabling this entry */
493  avio_skip(pb, 8);
494  avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
495  avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
496  avio_wl64(pb, ix); /* qwOffset */
497  avio_wl32(pb, size); /* dwSize */
498  ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
499  if (s->streams[stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
500  uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
501  if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
502  avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
503  avist->sample_requested = 1;
504  }
505  avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
506  } else
507  avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
508 
509  avio_seek(pb, pos, SEEK_SET);
510 }
511 
513 {
514  AVIOContext *pb = s->pb;
515  AVIContext *avi = s->priv_data;
516  char tag[5];
517  char ix_tag[] = "ix00";
518  int i, j;
519 
520  av_assert0(pb->seekable);
521 
522  for (i = 0; i < s->nb_streams; i++) {
523  AVIStream *avist = s->streams[i]->priv_data;
525  int64_t pos;
526  int size = 8+2+1+1+4+8+4+4+16*AVI_MASTER_INDEX_SIZE;
527 
528  pos = avio_tell(pb);
529  update_odml_entry(s, i, pos, size);
530  write_odml_master(s, i);
531  av_assert1(avio_tell(pb) - pos == size);
532  avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
533  }
535  }
536 
537  for (i = 0; i < s->nb_streams; i++) {
538  AVIStream *avist = s->streams[i]->priv_data;
539  int64_t ix;
540 
541  avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
542  ix_tag[3] = '0' + i;
543 
544  /* Writing AVI OpenDML leaf index chunk */
545  ix = avio_tell(pb);
546  ffio_wfourcc(pb, ix_tag); /* ix?? */
547  avio_wl32(pb, avist->indexes.entry * 8 + 24);
548  /* chunk size */
549  avio_wl16(pb, 2); /* wLongsPerEntry */
550  avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
551  avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
552  avio_wl32(pb, avist->indexes.entry);
553  /* nEntriesInUse */
554  ffio_wfourcc(pb, tag); /* dwChunkId */
555  avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
556  avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
557 
558  for (j = 0; j < avist->indexes.entry; j++) {
559  AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
560  avio_wl32(pb, ie->pos + 8);
561  avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
562  (ie->flags & 0x10 ? 0 : 0x80000000));
563  }
564 
565  update_odml_entry(s, i, ix, avio_tell(pb) - ix);
566  }
567  return 0;
568 }
569 
571 {
572  AVIOContext *pb = s->pb;
573  AVIContext *avi = s->priv_data;
574  int64_t idx_chunk;
575  int i;
576  char tag[5];
577 
578  if (pb->seekable) {
579  AVIStream *avist;
580  AVIIentry *ie = 0, *tie;
581  int empty, stream_id = -1;
582 
583  idx_chunk = ff_start_tag(pb, "idx1");
584  for (i = 0; i < s->nb_streams; i++) {
585  avist = s->streams[i]->priv_data;
586  avist->entry = 0;
587  }
588 
589  do {
590  empty = 1;
591  for (i = 0; i < s->nb_streams; i++) {
592  avist = s->streams[i]->priv_data;
593  if (avist->indexes.entry <= avist->entry)
594  continue;
595 
596  tie = avi_get_ientry(&avist->indexes, avist->entry);
597  if (empty || tie->pos < ie->pos) {
598  ie = tie;
599  stream_id = i;
600  }
601  empty = 0;
602  }
603  if (!empty) {
604  avist = s->streams[stream_id]->priv_data;
605  avi_stream2fourcc(tag, stream_id,
606  s->streams[stream_id]->codec->codec_type);
607  ffio_wfourcc(pb, tag);
608  avio_wl32(pb, ie->flags);
609  avio_wl32(pb, ie->pos);
610  avio_wl32(pb, ie->len);
611  avist->entry++;
612  }
613  } while (!empty);
614  ff_end_tag(pb, idx_chunk);
615 
616  avi_write_counters(s, avi->riff_id);
617  }
618  return 0;
619 }
620 
621 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
622 {
623  AVIStream *avist = s->streams[stream_index]->priv_data;
624  AVCodecContext *enc = s->streams[stream_index]->codec;
625 
626  ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
627  while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
628  dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
629  AVPacket empty_packet;
630 
631  if (dts - avist->packet_count > 60000) {
632  av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
633  return AVERROR(EINVAL);
634  }
635 
636  av_init_packet(&empty_packet);
637  empty_packet.size = 0;
638  empty_packet.data = NULL;
639  empty_packet.stream_index = stream_index;
640  avi_write_packet(s, &empty_packet);
641  ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
642  }
643 
644  return 0;
645 }
646 
648 {
649  unsigned char tag[5];
650  unsigned int flags = 0;
651  const int stream_index = pkt->stream_index;
652  int size = pkt->size;
653  AVIContext *avi = s->priv_data;
654  AVIOContext *pb = s->pb;
655  AVIStream *avist = s->streams[stream_index]->priv_data;
656  AVCodecContext *enc = s->streams[stream_index]->codec;
657  int ret;
658 
659  if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
660  ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
661  if (ret < 0)
662  return ret;
663  }
664 
665  if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
666  return ret;
667 
668  if (pkt->dts != AV_NOPTS_VALUE)
669  avist->last_dts = pkt->dts + pkt->duration;
670 
671  avist->packet_count++;
672 
673  // Make sure to put an OpenDML chunk when the file size exceeds the limits
674  if (pb->seekable &&
675  (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
676  avi_write_ix(s);
677  ff_end_tag(pb, avi->movi_list);
678 
679  if (avi->riff_id == 1)
680  avi_write_idx1(s);
681 
682  ff_end_tag(pb, avi->riff_start);
683  avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
684  }
685 
686  avi_stream2fourcc(tag, stream_index, enc->codec_type);
687  if (pkt->flags & AV_PKT_FLAG_KEY)
688  flags = 0x10;
689  if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
690  avist->audio_strm_length += size;
691 
692  if (s->pb->seekable) {
693  AVIIndex *idx = &avist->indexes;
694  int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
695  int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
696  if (idx->ents_allocated <= idx->entry) {
697  idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
698  if (!idx->cluster) {
699  idx->ents_allocated = 0;
700  idx->entry = 0;
701  return AVERROR(ENOMEM);
702  }
703  idx->cluster[cl] =
705  if (!idx->cluster[cl])
706  return AVERROR(ENOMEM);
708  }
709 
710  idx->cluster[cl][id].flags = flags;
711  idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
712  idx->cluster[cl][id].len = size;
713  avist->max_size = FFMAX(avist->max_size, size);
714  idx->entry++;
715  }
716 
717  avio_write(pb, tag, 4);
718  avio_wl32(pb, size);
719  avio_write(pb, pkt->data, size);
720  if (size & 1)
721  avio_w8(pb, 0);
722 
723  return 0;
724 }
725 
727 {
728  AVIContext *avi = s->priv_data;
729  AVIOContext *pb = s->pb;
730  int res = 0;
731  int i, j, n, nb_frames;
732  int64_t file_size;
733 
734  for (i = 0; i < s->nb_streams; i++) {
735  AVIStream *avist = s->streams[i]->priv_data;
736  write_skip_frames(s, i, avist->last_dts);
737  }
738 
739  if (pb->seekable) {
740  if (avi->riff_id == 1) {
741  ff_end_tag(pb, avi->movi_list);
742  res = avi_write_idx1(s);
743  ff_end_tag(pb, avi->riff_start);
744  } else {
745  avi_write_ix(s);
746  ff_end_tag(pb, avi->movi_list);
747  ff_end_tag(pb, avi->riff_start);
748 
749  file_size = avio_tell(pb);
750  avio_seek(pb, avi->odml_list - 8, SEEK_SET);
751  ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
752  avio_skip(pb, 16);
753 
754  for (n = nb_frames = 0; n < s->nb_streams; n++) {
755  AVCodecContext *stream = s->streams[n]->codec;
756  AVIStream *avist = s->streams[n]->priv_data;
757 
758  if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
759  if (nb_frames < avist->packet_count)
760  nb_frames = avist->packet_count;
761  } else {
762  if (stream->codec_id == AV_CODEC_ID_MP2 ||
763  stream->codec_id == AV_CODEC_ID_MP3)
764  nb_frames += avist->packet_count;
765  }
766  }
767  avio_wl32(pb, nb_frames);
768  avio_seek(pb, file_size, SEEK_SET);
769 
770  avi_write_counters(s, avi->riff_id);
771  }
772  }
773 
774  for (i = 0; i < s->nb_streams; i++) {
775  AVIStream *avist = s->streams[i]->priv_data;
776  for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
777  av_freep(&avist->indexes.cluster[j]);
778  av_freep(&avist->indexes.cluster);
779  avist->indexes.ents_allocated = avist->indexes.entry = 0;
780  if (pb->seekable) {
781  avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
782  avio_wl32(pb, avist->max_size);
783  }
784  }
785 
786  return res;
787 }
788 
789 #define OFFSET(x) offsetof(AVIContext, x)
790 #define ENC AV_OPT_FLAG_ENCODING_PARAM
791 static const AVOption options[] = {
792  { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
793  { NULL },
794 };
795 
796 static const AVClass avi_muxer_class = {
797  .class_name = "AVI muxer",
798  .item_name = av_default_item_name,
799  .option = options,
800  .version = LIBAVUTIL_VERSION_INT,
801 };
802 
804  .name = "avi",
805  .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
806  .mime_type = "video/x-msvideo",
807  .extensions = "avi",
808  .priv_data_size = sizeof(AVIContext),
809  .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
810  .video_codec = AV_CODEC_ID_MPEG4,
814  .codec_tag = (const AVCodecTag * const []) {
816  },
817  .priv_class = &avi_muxer_class,
818 };
static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
Definition: avienc.c:621
#define NULL
Definition: coverity.c:32
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:424
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
static enum AVPixelFormat pix_fmt
#define av_realloc_f(p, o, n)
void ff_end_tag(AVIOContext *pb, int64_t start)
Definition: riffenc.c:38
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
Definition: riffenc.c:31
AVOption.
Definition: opt.h:245
enum AVCodecID id
Definition: mxfenc.c:104
int master_odml_riff_id_base
Definition: avienc.c:57
unsigned int pos
Definition: avienc.c:47
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1597
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
int ents_allocated
Definition: avienc.c:56
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4149
#define AVI_MAX_RIFF_SIZE
Definition: avi.h:31
AVStream * video_st
Definition: movenc-test.c:59
int64_t audio_strm_offset
Definition: avienc.c:54
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:949
int num
numerator
Definition: rational.h:44
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:117
int size
Definition: avcodec.h:1468
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:208
#define AVI_MASTER_INDEX_SIZE
Definition: avi.h:32
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
static char * avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
Definition: avienc.c:112
void * priv_data
Definition: avformat.h:897
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:282
static AVPacket pkt
AVOutputFormat ff_avi_muxer
Definition: avienc.c:803
int64_t frames_hdr_strm
Definition: avienc.c:70
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2324
Format I/O context.
Definition: avformat.h:1314
int64_t odml_list
Definition: avienc.c:63
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 AVIF_ISINTERLEAVED
Definition: avi.h:26
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Public dictionary API.
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:324
#define av_malloc(s)
Opaque data information usually continuous.
Definition: avutil.h:195
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1485
int64_t movi_list
Definition: avidec.c:75
#define OFFSET(x)
Definition: avienc.c:789
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1382
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:39
uint8_t * data
Definition: avcodec.h:1467
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
int64_t riff_start
Definition: avienc.c:63
uint32_t tag
Definition: movenc.c:1348
#define ff_dlog(a,...)
static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb, const char *riff_tag, const char *list_tag)
Definition: avienc.c:91
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:442
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2917
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:182
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:67
#define av_log(a,...)
static const AVClass avi_muxer_class
Definition: avienc.c:796
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1499
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:412
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:300
#define ENC
Definition: avienc.c:790
#define AVI_MAX_STREAM_COUNT
Definition: avi.h:33
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static int avi_write_idx1(AVFormatContext *s)
Definition: avienc.c:570
void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale)
Definition: riffenc.c:238
int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
Check presence of H264 startcode.
Definition: mpegtsenc.c:1361
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
const char * av_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
Write a single RIFF info tag.
Definition: riffenc.c:271
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:420
simple assert() macros that are a bit more flexible than ISO C assert().
unsigned int flags
Definition: avienc.c:47
const AVCodecTag ff_codec_wav_tags[]
Definition: riff.c:420
#define FFMAX(a, b)
Definition: common.h:94
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1473
int packet_count
Definition: avienc.c:72
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:896
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
unsigned int len
Definition: avienc.c:47
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1370
static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
Definition: avienc.c:479
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:207
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:202
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
Raw Video Codec.
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
int width
picture width / height.
Definition: avcodec.h:1711
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
const char * name
Definition: avformat.h:523
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
static int avi_write_trailer(AVFormatContext *s)
Definition: avienc.c:726
int n
Definition: avisynth_c.h:547
AVDictionary * metadata
Definition: avformat.h:951
int64_t indx_start
Definition: avienc.c:53
int64_t audio_strm_length
Definition: avienc.c:71
static int avi_write_header(AVFormatContext *s)
Definition: avienc.c:191
#define AVIF_HASINDEX
Definition: avi.h:24
Stream structure.
Definition: avformat.h:877
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: avienc.c:647
enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
Definition: utils.c:975
enum AVMediaType codec_type
Definition: avcodec.h:1540
enum AVCodecID codec_id
Definition: avcodec.h:1549
AVIOContext * pb
I/O context.
Definition: avformat.h:1356
static const AVOption options[]
Definition: avienc.c:791
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:160
main external API structure.
Definition: avcodec.h:1532
int sample_requested
Definition: avienc.c:75
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1564
GLint GLenum type
Definition: opengl_enc.c:105
void ff_riff_write_info(AVFormatContext *s)
Write all recognized RIFF tags from s->metadata.
Definition: riffenc.c:302
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AVI_INDEX_CLUSTER_SIZE
Definition: avienc.c:50
int index
Definition: gxfenc.c:89
rational number numerator/denominator
Definition: rational.h:43
void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf, int ignore_extradata)
Definition: riffenc.c:206
AVMediaType
Definition: avutil.h:191
static AVIIentry * avi_get_ientry(const AVIIndex *idx, int ent_id)
Definition: avienc.c:84
static void write_odml_master(AVFormatContext *s, int stream_index)
Definition: avienc.c:164
AVIIentry ** cluster
Definition: avienc.c:58
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:79
static int flags
Definition: cpu.c:47
Main libavformat public API header.
int write_channel_mask
Definition: avienc.c:66
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
int den
denominator
Definition: rational.h:45
#define av_free(p)
char * value
Definition: dict.h:88
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
int64_t frames_hdr_all
Definition: avienc.c:64
const PixelFormatTag avpriv_pix_fmt_bps_avi[]
Definition: raw.c:285
int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc, int flags)
Write WAVEFORMAT header structure.
Definition: riffenc.c:54
void * priv_data
Format private data.
Definition: avformat.h:1342
#define FF_PUT_WAV_HEADER_SKIP_CHANNELMASK
Tell ff_put_wav_header() to write an empty channel mask.
Definition: riff.h:58
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:497
int entry
Definition: avienc.c:73
AVIIndex indexes
Definition: avienc.c:79
static int avi_write_counters(AVFormatContext *s, int riff_id)
Definition: avienc.c:131
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1466
#define AVIF_TRUSTCKTYPE
Definition: avi.h:27
#define av_freep(p)
int entry
Definition: avienc.c:55
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2078
int stream_index
Definition: avcodec.h:1469
int max_size
Definition: avienc.c:74
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:919
int64_t last_dts
Definition: avienc.c:77
#define MKTAG(a, b, c, d)
Definition: common.h:342
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
This structure stores compressed data.
Definition: avcodec.h:1444
static int write_packet(AVFormatContext *s1, AVPacket *pkt)
Definition: v4l2enc.c:86
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
static int avi_write_ix(AVFormatContext *s)
Definition: avienc.c:512
3-char terminologic language codes as per ISO-IEC 639-2
Definition: avlanguage.h:30
int riff_id
Definition: avienc.c:65
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240