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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/intreadwrite.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/timestamp.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavcodec/raw.h"
38 
39 /*
40  * TODO:
41  * - fill all fields if non streamed (nb_frames for example)
42  */
43 
44 typedef struct AVIIentry {
45  unsigned int flags, pos, len;
46 } AVIIentry;
47 
48 #define AVI_INDEX_CLUSTER_SIZE 16384
49 
50 typedef struct AVIIndex {
51  int64_t indx_start;
53  int entry;
57 } AVIIndex;
58 
59 typedef struct AVIContext {
61  int64_t frames_hdr_all;
62  int riff_id;
63 } AVIContext;
64 
65 typedef struct AVIStream {
66  int64_t frames_hdr_strm;
69  int entry;
70  int max_size;
72 
73  int64_t last_dts;
74 
76 } AVIStream;
77 
79 
80 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
81 {
82  int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
83  int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
84  return &idx->cluster[cl][id];
85 }
86 
88  const char *riff_tag, const char *list_tag)
89 {
90  AVIContext *avi = s->priv_data;
91  int64_t loff;
92  int i;
93 
94  avi->riff_id++;
95  for (i = 0; i < s->nb_streams; i++) {
96  AVIStream *avist = s->streams[i]->priv_data;
98  avist->indexes.entry = 0;
99  }
100 
101  avi->riff_start = ff_start_tag(pb, "RIFF");
102  ffio_wfourcc(pb, riff_tag);
103  loff = ff_start_tag(pb, "LIST");
104  ffio_wfourcc(pb, list_tag);
105  return loff;
106 }
107 
108 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
109 {
110  tag[0] = '0' + index / 10;
111  tag[1] = '0' + index % 10;
112  if (type == AVMEDIA_TYPE_VIDEO) {
113  tag[2] = 'd';
114  tag[3] = 'c';
115  } else if (type == AVMEDIA_TYPE_SUBTITLE) {
116  // note: this is not an official code
117  tag[2] = 's';
118  tag[3] = 'b';
119  } else {
120  tag[2] = 'w';
121  tag[3] = 'b';
122  }
123  tag[4] = '\0';
124  return tag;
125 }
126 
127 static int avi_write_counters(AVFormatContext *s, int riff_id)
128 {
129  AVIOContext *pb = s->pb;
130  AVIContext *avi = s->priv_data;
131  int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
132  int64_t file_size;
133  AVCodecContext *stream;
134 
135  file_size = avio_tell(pb);
136  for (n = 0; n < s->nb_streams; n++) {
137  AVIStream *avist = s->streams[n]->priv_data;
138 
139  av_assert0(avist->frames_hdr_strm);
140  stream = s->streams[n]->codec;
141  avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
142  ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
143  if (au_ssize == 0)
144  avio_wl32(pb, avist->packet_count);
145  else
146  avio_wl32(pb, avist->audio_strm_length / au_ssize);
147  if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
148  nb_frames = FFMAX(nb_frames, avist->packet_count);
149  }
150  if (riff_id == 1) {
152  avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
153  avio_wl32(pb, nb_frames);
154  }
155  avio_seek(pb, file_size, SEEK_SET);
156 
157  return 0;
158 }
159 
160 static void write_odml_master(AVFormatContext *s, int stream_index)
161 {
162  AVIOContext *pb = s->pb;
163  AVStream *st = s->streams[stream_index];
164  AVCodecContext *enc = st->codec;
165  AVIStream *avist = st->priv_data;
166  unsigned char tag[5];
167  int j;
168 
169  /* Starting to lay out AVI OpenDML master index.
170  * We want to make it JUNK entry for now, since we'd
171  * like to get away without making AVI an OpenDML one
172  * for compatibility reasons. */
173  avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
174  avio_wl16(pb, 4); /* wLongsPerEntry */
175  avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
176  avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
177  avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
178  ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
179  /* dwChunkId */
180  avio_wl64(pb, 0); /* dwReserved[3] */
181  avio_wl32(pb, 0); /* Must be 0. */
182  for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
183  avio_wl64(pb, 0);
184  ff_end_tag(pb, avist->indexes.indx_start);
185 }
186 
188 {
189  AVIContext *avi = s->priv_data;
190  AVIOContext *pb = s->pb;
191  int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
192  AVCodecContext *video_enc;
193  AVStream *video_st = NULL;
194  int64_t list1, list2, strh, strf;
195  AVDictionaryEntry *t = NULL;
196  int padding;
197 
198  if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
199  av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
201  return AVERROR(EINVAL);
202  }
203 
204  for (n = 0; n < s->nb_streams; n++) {
205  s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
206  if (!s->streams[n]->priv_data)
207  return AVERROR(ENOMEM);
208  }
209 
210  /* header list */
211  avi->riff_id = 0;
212  list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
213 
214  /* avi header */
215  ffio_wfourcc(pb, "avih");
216  avio_wl32(pb, 14 * 4);
217  bitrate = 0;
218 
219  video_enc = NULL;
220  for (n = 0; n < s->nb_streams; n++) {
221  AVCodecContext *codec = s->streams[n]->codec;
222  bitrate += codec->bit_rate;
223  if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
224  video_enc = codec;
225  video_st = s->streams[n];
226  }
227  }
228 
229  nb_frames = 0;
230 
231  // TODO: should be avg_frame_rate
232  if (video_st)
233  avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
234  video_st->time_base.den));
235  else
236  avio_wl32(pb, 0);
237  avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
238  avio_wl32(pb, 0); /* padding */
239  if (!pb->seekable)
240  avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
241  else
243  avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
244  avio_wl32(pb, nb_frames); /* nb frames, filled later */
245  avio_wl32(pb, 0); /* initial frame */
246  avio_wl32(pb, s->nb_streams); /* nb streams */
247  avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
248  if (video_enc) {
249  avio_wl32(pb, video_enc->width);
250  avio_wl32(pb, video_enc->height);
251  } else {
252  avio_wl32(pb, 0);
253  avio_wl32(pb, 0);
254  }
255  avio_wl32(pb, 0); /* reserved */
256  avio_wl32(pb, 0); /* reserved */
257  avio_wl32(pb, 0); /* reserved */
258  avio_wl32(pb, 0); /* reserved */
259 
260  /* stream list */
261  for (i = 0; i < n; i++) {
262  AVStream *st = s->streams[i];
263  AVCodecContext *enc = st->codec;
264  AVIStream *avist = st->priv_data;
265  list2 = ff_start_tag(pb, "LIST");
266  ffio_wfourcc(pb, "strl");
267 
268  /* stream generic header */
269  strh = ff_start_tag(pb, "strh");
270  switch (enc->codec_type) {
272  // XSUB subtitles behave like video tracks, other subtitles
273  // are not (yet) supported.
274  if (enc->codec_id != AV_CODEC_ID_XSUB) {
275  av_log(s, AV_LOG_ERROR,
276  "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
277  return AVERROR_PATCHWELCOME;
278  }
279  case AVMEDIA_TYPE_VIDEO:
280  ffio_wfourcc(pb, "vids");
281  break;
282  case AVMEDIA_TYPE_AUDIO:
283  ffio_wfourcc(pb, "auds");
284  break;
285 // case AVMEDIA_TYPE_TEXT:
286 // ffio_wfourcc(pb, "txts");
287 // break;
288  case AVMEDIA_TYPE_DATA:
289  ffio_wfourcc(pb, "dats");
290  break;
291  }
292  if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
293  enc->codec_id == AV_CODEC_ID_XSUB)
294  avio_wl32(pb, enc->codec_tag);
295  else
296  avio_wl32(pb, 1);
297  avio_wl32(pb, 0); /* flags */
298  avio_wl16(pb, 0); /* priority */
299  avio_wl16(pb, 0); /* language */
300  avio_wl32(pb, 0); /* initial frame */
301 
302  ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
303 
304  if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
305  && enc->codec_id != AV_CODEC_ID_XSUB
306  && au_byterate > 1000LL*au_scale) {
307  au_byterate = 600;
308  au_scale = 1;
309  }
310  avpriv_set_pts_info(st, 64, au_scale, au_byterate);
311  if (enc->codec_id == AV_CODEC_ID_XSUB)
312  au_scale = au_byterate = 0;
313 
314  avio_wl32(pb, au_scale); /* scale */
315  avio_wl32(pb, au_byterate); /* rate */
316 
317  avio_wl32(pb, 0); /* start */
318  /* remember this offset to fill later */
319  avist->frames_hdr_strm = avio_tell(pb);
320  if (!pb->seekable)
321  /* FIXME: this may be broken, but who cares */
323  else
324  avio_wl32(pb, 0); /* length, XXX: filled later */
325 
326  /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
327  if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
328  avio_wl32(pb, 1024 * 1024);
329  else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
330  avio_wl32(pb, 12 * 1024);
331  else
332  avio_wl32(pb, 0);
333  avio_wl32(pb, -1); /* quality */
334  avio_wl32(pb, au_ssize); /* sample size */
335  avio_wl32(pb, 0);
336  avio_wl16(pb, enc->width);
337  avio_wl16(pb, enc->height);
338  ff_end_tag(pb, strh);
339 
340  if (enc->codec_type != AVMEDIA_TYPE_DATA) {
341  int ret;
342  enum AVPixelFormat pix_fmt;
343 
344  strf = ff_start_tag(pb, "strf");
345  switch (enc->codec_type) {
347  /* XSUB subtitles behave like video tracks, other subtitles
348  * are not (yet) supported. */
349  if (enc->codec_id != AV_CODEC_ID_XSUB)
350  break;
351  case AVMEDIA_TYPE_VIDEO:
352  /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
353  if ( !enc->codec_tag
354  && enc->codec_id == AV_CODEC_ID_RAWVIDEO
355  && enc->pix_fmt == AV_PIX_FMT_RGB555LE
356  && enc->bits_per_coded_sample == 15)
357  enc->bits_per_coded_sample = 16;
358  ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
360  enc->bits_per_coded_sample);
361  if ( !enc->codec_tag
362  && enc->codec_id == AV_CODEC_ID_RAWVIDEO
363  && enc->pix_fmt != pix_fmt
364  && enc->pix_fmt != AV_PIX_FMT_NONE)
365  av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
367  break;
368  case AVMEDIA_TYPE_AUDIO:
369  if ((ret = ff_put_wav_header(pb, enc, 0)) < 0)
370  return ret;
371  break;
372  default:
373  av_log(s, AV_LOG_ERROR,
374  "Invalid or not supported codec type '%s' found in the input\n",
375  (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
376  return AVERROR(EINVAL);
377  }
378  ff_end_tag(pb, strf);
379  if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
380  ff_riff_write_info_tag(s->pb, "strn", t->value);
381  t = NULL;
382  }
383  if (enc->codec_id == AV_CODEC_ID_XSUB
384  && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
385  const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
386  t = NULL;
387  if (langstr) {
388  char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
389  ff_riff_write_info_tag(s->pb, "strn", str);
390  av_free(str);
391  }
392  }
393  }
394 
395  if (pb->seekable) {
396  write_odml_master(s, i);
397  }
398 
399  if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
400  st->sample_aspect_ratio.num > 0 &&
401  st->sample_aspect_ratio.den > 0) {
402  int vprp = ff_start_tag(pb, "vprp");
404  (AVRational) { enc->width,
405  enc->height });
406  int num, den;
407  av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
408 
409  avio_wl32(pb, 0); // video format = unknown
410  avio_wl32(pb, 0); // video standard = unknown
411  // TODO: should be avg_frame_rate
412  avio_wl32(pb, lrintf(1.0 / av_q2d(st->time_base)));
413  avio_wl32(pb, enc->width);
414  avio_wl32(pb, enc->height);
415  avio_wl16(pb, den);
416  avio_wl16(pb, num);
417  avio_wl32(pb, enc->width);
418  avio_wl32(pb, enc->height);
419  avio_wl32(pb, 1); // progressive FIXME
420 
421  avio_wl32(pb, enc->height);
422  avio_wl32(pb, enc->width);
423  avio_wl32(pb, enc->height);
424  avio_wl32(pb, enc->width);
425  avio_wl32(pb, 0);
426  avio_wl32(pb, 0);
427 
428  avio_wl32(pb, 0);
429  avio_wl32(pb, 0);
430  ff_end_tag(pb, vprp);
431  }
432 
433  ff_end_tag(pb, list2);
434  }
435 
436  if (pb->seekable) {
437  /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
438  avi->odml_list = ff_start_tag(pb, "JUNK");
439  ffio_wfourcc(pb, "odml");
440  ffio_wfourcc(pb, "dmlh");
441  avio_wl32(pb, 248);
442  for (i = 0; i < 248; i += 4)
443  avio_wl32(pb, 0);
444  ff_end_tag(pb, avi->odml_list);
445  }
446 
447  ff_end_tag(pb, list1);
448 
450 
451 
452  padding = s->metadata_header_padding;
453  if (padding < 0)
454  padding = 1016;
455 
456  /* some padding for easier tag editing */
457  if (padding) {
458  list2 = ff_start_tag(pb, "JUNK");
459  for (i = padding; i > 0; i -= 4)
460  avio_wl32(pb, 0);
461  ff_end_tag(pb, list2);
462  }
463 
464  avi->movi_list = ff_start_tag(pb, "LIST");
465  ffio_wfourcc(pb, "movi");
466 
467  avio_flush(pb);
468 
469  return 0;
470 }
471 
472 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
473 {
474  AVIOContext *pb = s->pb;
475  AVIContext *avi = s->priv_data;
476  AVIStream *avist = s->streams[stream_index]->priv_data;
477  int64_t pos;
478  int au_byterate, au_ssize, au_scale;
479 
480  avio_flush(pb);
481  pos = avio_tell(pb);
482 
483  /* Updating one entry in the AVI OpenDML master index */
484  avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
485  ffio_wfourcc(pb, "indx"); /* enabling this entry */
486  avio_skip(pb, 8);
487  avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
488  avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
489  avio_wl64(pb, ix); /* qwOffset */
490  avio_wl32(pb, size); /* dwSize */
491  ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
492  if (s->streams[stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
493  uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
494  if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
495  avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
496  avist->sample_requested = 1;
497  }
498  avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
499  } else
500  avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
501 
502  avio_seek(pb, pos, SEEK_SET);
503 }
504 
506 {
507  AVIOContext *pb = s->pb;
508  AVIContext *avi = s->priv_data;
509  char tag[5];
510  char ix_tag[] = "ix00";
511  int i, j;
512 
513  av_assert0(pb->seekable);
514 
515  for (i = 0; i < s->nb_streams; i++) {
516  AVIStream *avist = s->streams[i]->priv_data;
518  int64_t pos;
519  int size = 8+2+1+1+4+8+4+4+16*AVI_MASTER_INDEX_SIZE;
520 
521  pos = avio_tell(pb);
522  update_odml_entry(s, i, pos, size);
523  write_odml_master(s, i);
524  av_assert1(avio_tell(pb) - pos == size);
525  avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
526  }
528  }
529 
530  for (i = 0; i < s->nb_streams; i++) {
531  AVIStream *avist = s->streams[i]->priv_data;
532  int64_t ix;
533 
534  avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
535  ix_tag[3] = '0' + i;
536 
537  /* Writing AVI OpenDML leaf index chunk */
538  ix = avio_tell(pb);
539  ffio_wfourcc(pb, ix_tag); /* ix?? */
540  avio_wl32(pb, avist->indexes.entry * 8 + 24);
541  /* chunk size */
542  avio_wl16(pb, 2); /* wLongsPerEntry */
543  avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
544  avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
545  avio_wl32(pb, avist->indexes.entry);
546  /* nEntriesInUse */
547  ffio_wfourcc(pb, tag); /* dwChunkId */
548  avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
549  avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
550 
551  for (j = 0; j < avist->indexes.entry; j++) {
552  AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
553  avio_wl32(pb, ie->pos + 8);
554  avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
555  (ie->flags & 0x10 ? 0 : 0x80000000));
556  }
557 
558  update_odml_entry(s, i, ix, avio_tell(pb) - ix);
559  }
560  return 0;
561 }
562 
564 {
565  AVIOContext *pb = s->pb;
566  AVIContext *avi = s->priv_data;
567  int64_t idx_chunk;
568  int i;
569  char tag[5];
570 
571  if (pb->seekable) {
572  AVIStream *avist;
573  AVIIentry *ie = 0, *tie;
574  int empty, stream_id = -1;
575 
576  idx_chunk = ff_start_tag(pb, "idx1");
577  for (i = 0; i < s->nb_streams; i++) {
578  avist = s->streams[i]->priv_data;
579  avist->entry = 0;
580  }
581 
582  do {
583  empty = 1;
584  for (i = 0; i < s->nb_streams; i++) {
585  avist = s->streams[i]->priv_data;
586  if (avist->indexes.entry <= avist->entry)
587  continue;
588 
589  tie = avi_get_ientry(&avist->indexes, avist->entry);
590  if (empty || tie->pos < ie->pos) {
591  ie = tie;
592  stream_id = i;
593  }
594  empty = 0;
595  }
596  if (!empty) {
597  avist = s->streams[stream_id]->priv_data;
598  avi_stream2fourcc(tag, stream_id,
599  s->streams[stream_id]->codec->codec_type);
600  ffio_wfourcc(pb, tag);
601  avio_wl32(pb, ie->flags);
602  avio_wl32(pb, ie->pos);
603  avio_wl32(pb, ie->len);
604  avist->entry++;
605  }
606  } while (!empty);
607  ff_end_tag(pb, idx_chunk);
608 
609  avi_write_counters(s, avi->riff_id);
610  }
611  return 0;
612 }
613 
614 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
615 {
616  AVIStream *avist = s->streams[stream_index]->priv_data;
617  AVCodecContext *enc = s->streams[stream_index]->codec;
618 
619  av_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
620  while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
621  dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
622  AVPacket empty_packet;
623 
624  if (dts - avist->packet_count > 60000) {
625  av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
626  return AVERROR(EINVAL);
627  }
628 
629  av_init_packet(&empty_packet);
630  empty_packet.size = 0;
631  empty_packet.data = NULL;
632  empty_packet.stream_index = stream_index;
633  avi_write_packet(s, &empty_packet);
634  av_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
635  }
636 
637  return 0;
638 }
639 
641 {
642  unsigned char tag[5];
643  unsigned int flags = 0;
644  const int stream_index = pkt->stream_index;
645  int size = pkt->size;
646  AVIContext *avi = s->priv_data;
647  AVIOContext *pb = s->pb;
648  AVIStream *avist = s->streams[stream_index]->priv_data;
649  AVCodecContext *enc = s->streams[stream_index]->codec;
650  int ret;
651 
652  if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
653  ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
654  if (ret < 0)
655  return ret;
656  }
657 
658  if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
659  return ret;
660 
661  if (pkt->dts != AV_NOPTS_VALUE)
662  avist->last_dts = pkt->dts + pkt->duration;
663 
664  avist->packet_count++;
665 
666  // Make sure to put an OpenDML chunk when the file size exceeds the limits
667  if (pb->seekable &&
668  (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
669  avi_write_ix(s);
670  ff_end_tag(pb, avi->movi_list);
671 
672  if (avi->riff_id == 1)
673  avi_write_idx1(s);
674 
675  ff_end_tag(pb, avi->riff_start);
676  avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
677  }
678 
679  avi_stream2fourcc(tag, stream_index, enc->codec_type);
680  if (pkt->flags & AV_PKT_FLAG_KEY)
681  flags = 0x10;
682  if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
683  avist->audio_strm_length += size;
684 
685  if (s->pb->seekable) {
686  AVIIndex *idx = &avist->indexes;
687  int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
688  int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
689  if (idx->ents_allocated <= idx->entry) {
690  idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
691  if (!idx->cluster) {
692  idx->ents_allocated = 0;
693  idx->entry = 0;
694  return AVERROR(ENOMEM);
695  }
696  idx->cluster[cl] =
698  if (!idx->cluster[cl])
699  return AVERROR(ENOMEM);
701  }
702 
703  idx->cluster[cl][id].flags = flags;
704  idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
705  idx->cluster[cl][id].len = size;
706  avist->max_size = FFMAX(avist->max_size, size);
707  idx->entry++;
708  }
709 
710  avio_write(pb, tag, 4);
711  avio_wl32(pb, size);
712  avio_write(pb, pkt->data, size);
713  if (size & 1)
714  avio_w8(pb, 0);
715 
716  return 0;
717 }
718 
720 {
721  AVIContext *avi = s->priv_data;
722  AVIOContext *pb = s->pb;
723  int res = 0;
724  int i, j, n, nb_frames;
725  int64_t file_size;
726 
727  for (i = 0; i < s->nb_streams; i++) {
728  AVIStream *avist = s->streams[i]->priv_data;
729  write_skip_frames(s, i, avist->last_dts);
730  }
731 
732  if (pb->seekable) {
733  if (avi->riff_id == 1) {
734  ff_end_tag(pb, avi->movi_list);
735  res = avi_write_idx1(s);
736  ff_end_tag(pb, avi->riff_start);
737  } else {
738  avi_write_ix(s);
739  ff_end_tag(pb, avi->movi_list);
740  ff_end_tag(pb, avi->riff_start);
741 
742  file_size = avio_tell(pb);
743  avio_seek(pb, avi->odml_list - 8, SEEK_SET);
744  ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
745  avio_skip(pb, 16);
746 
747  for (n = nb_frames = 0; n < s->nb_streams; n++) {
748  AVCodecContext *stream = s->streams[n]->codec;
749  AVIStream *avist = s->streams[n]->priv_data;
750 
751  if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
752  if (nb_frames < avist->packet_count)
753  nb_frames = avist->packet_count;
754  } else {
755  if (stream->codec_id == AV_CODEC_ID_MP2 ||
756  stream->codec_id == AV_CODEC_ID_MP3)
757  nb_frames += avist->packet_count;
758  }
759  }
760  avio_wl32(pb, nb_frames);
761  avio_seek(pb, file_size, SEEK_SET);
762 
763  avi_write_counters(s, avi->riff_id);
764  }
765  }
766 
767  for (i = 0; i < s->nb_streams; i++) {
768  AVIStream *avist = s->streams[i]->priv_data;
769  for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
770  av_freep(&avist->indexes.cluster[j]);
771  av_freep(&avist->indexes.cluster);
772  avist->indexes.ents_allocated = avist->indexes.entry = 0;
773  if (pb->seekable) {
774  avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
775  avio_wl32(pb, avist->max_size);
776  }
777  }
778 
779  return res;
780 }
781 
783  .name = "avi",
784  .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
785  .mime_type = "video/x-msvideo",
786  .extensions = "avi",
787  .priv_data_size = sizeof(AVIContext),
788  .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
789  .video_codec = AV_CODEC_ID_MPEG4,
793  .codec_tag = (const AVCodecTag * const []) {
795  },
796 };