FFmpeg
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 #include <math.h>
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/avutil.h"
33 #include "libavutil/internal.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  char tag[4];
48  unsigned int flags;
49  unsigned int pos;
50  unsigned int len;
51 } AVIIentry;
52 
53 #define AVI_INDEX_CLUSTER_SIZE 16384
54 #define AVI_MASTER_INDEX_PREFIX_SIZE (8+2+1+1+4+8+4+4)
55 #define AVI_MASTER_INDEX_ENTRY_SIZE 16 /* bytes per entry */
56 #define AVI_MASTER_INDEX_SIZE_DEFAULT 256 /* number of entries */
57 
58 typedef struct AVIIndex {
59  int64_t indx_start;
60  int64_t audio_strm_offset;
61  int entry;
62  int ents_allocated;
63  int master_odml_riff_id_base;
64  AVIIentry** cluster;
65 } AVIIndex;
66 
67 typedef struct AVIContext {
68  const AVClass *class;
69  AVPacket *empty_packet;
70  int64_t riff_start, movi_list, odml_list;
71  int64_t frames_hdr_all;
72  int riff_id;
73  int reserve_index_space;
74  int master_index_max_size;
75  int write_channel_mask;
76  int flipped_raw_rgb;
77 } AVIContext;
78 
79 typedef struct AVIStream {
80  int64_t frames_hdr_strm;
81  int64_t audio_strm_length;
82  int packet_count;
83  int entry;
84  int max_size;
85  int sample_requested;
86 
87  int64_t last_dts;
88 
89  AVIIndex indexes;
90 
91  int64_t strh_flags_offset;
92 
93  uint32_t palette[AVPALETTE_COUNT];
94  uint32_t old_palette[AVPALETTE_COUNT];
95  int64_t pal_offset;
96 } AVIStream;
97 
98 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
99 
100 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
101 {
102  int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
103  int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
104  return &idx->cluster[cl][id];
105 }
106 
107 static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,
108  unsigned int flags, unsigned int size)
109 {
110  AVIContext *avi = s->priv_data;
111  AVIOContext *pb = s->pb;
112  AVIStream *avist = s->streams[stream_index]->priv_data;
113  AVIIndex *idx = &avist->indexes;
114  int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
115  int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
116 
117  if (idx->ents_allocated <= idx->entry) {
118  idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
119  if (!idx->cluster) {
120  idx->ents_allocated = 0;
121  idx->entry = 0;
122  return AVERROR(ENOMEM);
123  }
124  idx->cluster[cl] =
125  av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
126  if (!idx->cluster[cl])
127  return AVERROR(ENOMEM);
128  idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
129  }
130 
131  if (tag)
132  memcpy(idx->cluster[cl][id].tag, tag, 4);
133  else
134  memset(idx->cluster[cl][id].tag, 0, 4);
135  idx->cluster[cl][id].flags = flags;
136  idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
137  idx->cluster[cl][id].len = size;
138  avist->max_size = FFMAX(avist->max_size, size);
139  idx->entry++;
140 
141  return 0;
142 }
143 
144 static av_cold int avi_init(struct AVFormatContext *s)
145 {
146  AVIContext *avi = s->priv_data;
147 
148  if (avi->reserve_index_space > 0) {
149  avi->master_index_max_size = (avi->reserve_index_space - AVI_MASTER_INDEX_PREFIX_SIZE) / AVI_MASTER_INDEX_ENTRY_SIZE;
150  avi->master_index_max_size = FFMAX(avi->master_index_max_size, 16);
151  } else
152  avi->master_index_max_size = AVI_MASTER_INDEX_SIZE_DEFAULT;
153  av_log(s, AV_LOG_DEBUG, "reserve_index_space:%d master_index_max_size:%d\n",
154  avi->reserve_index_space, avi->master_index_max_size);
155 
156  return 1; /* stream initialization continues in avi_write_header */
157 }
158 
159 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
160  const char *riff_tag, const char *list_tag)
161 {
162  AVIContext *avi = s->priv_data;
163  int64_t loff;
164  int i;
165 
166  avi->riff_id++;
167  for (i = 0; i < s->nb_streams; i++) {
168  AVIStream *avist = s->streams[i]->priv_data;
169  avist->indexes.audio_strm_offset = avist->audio_strm_length;
170  avist->indexes.entry = 0;
171  }
172 
173  avi->riff_start = ff_start_tag(pb, "RIFF");
174  ffio_wfourcc(pb, riff_tag);
175  loff = ff_start_tag(pb, "LIST");
176  ffio_wfourcc(pb, list_tag);
177  return loff;
178 }
179 
180 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
181 {
182  tag[0] = '0' + index / 10;
183  tag[1] = '0' + index % 10;
184  if (type == AVMEDIA_TYPE_VIDEO) {
185  tag[2] = 'd';
186  tag[3] = 'c';
187  } else if (type == AVMEDIA_TYPE_SUBTITLE) {
188  // note: this is not an official code
189  tag[2] = 's';
190  tag[3] = 'b';
191  } else {
192  tag[2] = 'w';
193  tag[3] = 'b';
194  }
195  tag[4] = '\0';
196  return tag;
197 }
198 
199 static int avi_write_counters(AVFormatContext *s, int riff_id)
200 {
201  AVIOContext *pb = s->pb;
202  AVIContext *avi = s->priv_data;
203  int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
204  int64_t file_size;
205  AVCodecParameters *par;
206 
207  file_size = avio_tell(pb);
208  for (n = 0; n < s->nb_streams; n++) {
209  AVIStream *avist = s->streams[n]->priv_data;
210 
211  av_assert0(avist->frames_hdr_strm);
212  par = s->streams[n]->codecpar;
213  avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
214  ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
215  if (au_ssize == 0)
216  avio_wl32(pb, avist->packet_count);
217  else
218  avio_wl32(pb, avist->audio_strm_length / au_ssize);
219  if (par->codec_type == AVMEDIA_TYPE_VIDEO)
220  nb_frames = FFMAX(nb_frames, avist->packet_count);
221  }
222  if (riff_id == 1) {
223  av_assert0(avi->frames_hdr_all);
224  avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
225  avio_wl32(pb, nb_frames);
226  }
227  avio_seek(pb, file_size, SEEK_SET);
228 
229  return 0;
230 }
231 
232 static void write_odml_master(AVFormatContext *s, int stream_index)
233 {
234  AVIOContext *pb = s->pb;
235  AVIContext *avi = s->priv_data;
236  AVStream *st = s->streams[stream_index];
237  AVCodecParameters *par = st->codecpar;
238  AVIStream *avist = st->priv_data;
239  unsigned char tag[5];
240  int j;
241 
242  /* Starting to lay out AVI OpenDML master index.
243  * We want to make it JUNK entry for now, since we'd
244  * like to get away without making AVI an OpenDML one
245  * for compatibility reasons. */
246  avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
247  avio_wl16(pb, 4); /* wLongsPerEntry */
248  avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
249  avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
250  avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
251  ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));
252  /* dwChunkId */
253  avio_wl64(pb, 0); /* dwReserved[3] */
254  avio_wl32(pb, 0); /* Must be 0. */
255  for (j = 0; j < avi->master_index_max_size * 2; j++)
256  avio_wl64(pb, 0);
257  ff_end_tag(pb, avist->indexes.indx_start);
258 }
259 
260 static int avi_write_header(AVFormatContext *s)
261 {
262  AVIContext *avi = s->priv_data;
263  AVIOContext *pb = s->pb;
264  int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
265  int64_t max_stream_duration = 0;
266  AVCodecParameters *video_par;
267  AVStream *video_st = NULL;
268  int64_t list1, list2, strh, strf;
269  AVDictionaryEntry *t = NULL;
270  int padding;
271 
272  if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
273  av_log(s, AV_LOG_ERROR, "AVI does not support "
274  ">"AV_STRINGIFY(AVI_MAX_STREAM_COUNT)" streams\n");
275  return AVERROR(EINVAL);
276  }
277 
278  avi->empty_packet = av_packet_alloc();
279  if (!avi->empty_packet)
280  return AVERROR(ENOMEM);
281 
282  for (n = 0; n < s->nb_streams; n++) {
283  s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
284  if (!s->streams[n]->priv_data)
285  return AVERROR(ENOMEM);
286  }
287 
288  /* header list */
289  avi->riff_id = 0;
290  list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
291 
292  /* avi header */
293  ffio_wfourcc(pb, "avih");
294  avio_wl32(pb, 14 * 4);
295  bitrate = 0;
296 
297  video_par = NULL;
298  for (n = 0; n < s->nb_streams; n++) {
299  AVCodecParameters *par = s->streams[n]->codecpar;
300  AVStream *st = s->streams[n];
301  bitrate = FFMIN(bitrate + par->bit_rate, INT32_MAX);
302  if (st->duration > 0) {
303  int64_t stream_duration = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
304  max_stream_duration = FFMAX(stream_duration, max_stream_duration);
305  }
306  if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
307  video_par = par;
308  video_st = st;
309  }
310  }
311 
312  /* guess master index size based on bitrate and duration */
313  if (!avi->reserve_index_space) {
314  double duration_est, filesize_est;
315  if (s->duration > 0)
316  duration_est = (double)s->duration / AV_TIME_BASE;
317  else if (max_stream_duration > 0)
318  duration_est = (double)max_stream_duration / AV_TIME_BASE;
319  else
320  duration_est = 10 * 60 * 60; /* default to 10 hours */
321  filesize_est = duration_est * (bitrate / 8) * 1.10; /* add 10% safety margin for muxer+bitrate */
322  avi->master_index_max_size = FFMAX((int)ceil(filesize_est / AVI_MAX_RIFF_SIZE) + 1,
323  avi->master_index_max_size);
324  av_log(s, AV_LOG_DEBUG, "duration_est:%0.3f, filesize_est:%0.1fGiB, master_index_max_size:%d\n",
325  duration_est, filesize_est / (1024*1024*1024), avi->master_index_max_size);
326  }
327 
328  nb_frames = 0;
329 
330  // TODO: should be avg_frame_rate
331  if (video_st)
332  avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
333  video_st->time_base.den));
334  else
335  avio_wl32(pb, 0);
336  avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
337  avio_wl32(pb, 0); /* padding */
338  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
339  avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
340  else
341  avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
342  avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
343  avio_wl32(pb, nb_frames); /* nb frames, filled later */
344  avio_wl32(pb, 0); /* initial frame */
345  avio_wl32(pb, s->nb_streams); /* nb streams */
346  avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
347  if (video_par) {
348  avio_wl32(pb, video_par->width);
349  avio_wl32(pb, video_par->height);
350  } else {
351  avio_wl32(pb, 0);
352  avio_wl32(pb, 0);
353  }
354  avio_wl32(pb, 0); /* reserved */
355  avio_wl32(pb, 0); /* reserved */
356  avio_wl32(pb, 0); /* reserved */
357  avio_wl32(pb, 0); /* reserved */
358 
359  /* stream list */
360  for (i = 0; i < n; i++) {
361  AVStream *st = s->streams[i];
362  AVCodecParameters *par = st->codecpar;
363  AVIStream *avist = st->priv_data;
364  list2 = ff_start_tag(pb, "LIST");
365  ffio_wfourcc(pb, "strl");
366 
367  /* stream generic header */
368  strh = ff_start_tag(pb, "strh");
369  switch (par->codec_type) {
370  case AVMEDIA_TYPE_SUBTITLE:
371  // XSUB subtitles behave like video tracks, other subtitles
372  // are not (yet) supported.
373  if (par->codec_id != AV_CODEC_ID_XSUB) {
374  avpriv_report_missing_feature(s, "Subtitle streams other than DivX XSUB");
375  return AVERROR_PATCHWELCOME;
376  }
377  case AVMEDIA_TYPE_VIDEO:
378  ffio_wfourcc(pb, "vids");
379  break;
380  case AVMEDIA_TYPE_AUDIO:
381  ffio_wfourcc(pb, "auds");
382  break;
383 // case AVMEDIA_TYPE_TEXT:
384 // ffio_wfourcc(pb, "txts");
385 // break;
386  case AVMEDIA_TYPE_DATA:
387  ffio_wfourcc(pb, "dats");
388  break;
389  }
390  if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
391  par->codec_id == AV_CODEC_ID_XSUB)
392  avio_wl32(pb, par->codec_tag);
393  else
394  avio_wl32(pb, 1);
395  avist->strh_flags_offset = avio_tell(pb);
396  avio_wl32(pb, 0); /* flags */
397  avio_wl16(pb, 0); /* priority */
398  avio_wl16(pb, 0); /* language */
399  avio_wl32(pb, 0); /* initial frame */
400 
401  ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
402 
403  if ( par->codec_type == AVMEDIA_TYPE_VIDEO
404  && par->codec_id != AV_CODEC_ID_XSUB
405  && au_byterate > 1000LL*au_scale) {
406  au_byterate = 600;
407  au_scale = 1;
408  }
409  avpriv_set_pts_info(st, 64, au_scale, au_byterate);
410  if (par->codec_id == AV_CODEC_ID_XSUB)
411  au_scale = au_byterate = 0;
412 
413  avio_wl32(pb, au_scale); /* scale */
414  avio_wl32(pb, au_byterate); /* rate */
415 
416  avio_wl32(pb, 0); /* start */
417  /* remember this offset to fill later */
418  avist->frames_hdr_strm = avio_tell(pb);
419  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
420  /* FIXME: this may be broken, but who cares */
421  avio_wl32(pb, AVI_MAX_RIFF_SIZE);
422  else
423  avio_wl32(pb, 0); /* length, XXX: filled later */
424 
425  /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
426  if (par->codec_type == AVMEDIA_TYPE_VIDEO)
427  avio_wl32(pb, 1024 * 1024);
428  else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
429  avio_wl32(pb, 12 * 1024);
430  else
431  avio_wl32(pb, 0);
432  avio_wl32(pb, -1); /* quality */
433  avio_wl32(pb, au_ssize); /* sample size */
434  avio_wl32(pb, 0);
435  avio_wl16(pb, par->width);
436  avio_wl16(pb, par->height);
437  ff_end_tag(pb, strh);
438 
439  if (par->codec_type != AVMEDIA_TYPE_DATA) {
440  int ret, flags;
441  enum AVPixelFormat pix_fmt;
442 
443  strf = ff_start_tag(pb, "strf");
444  switch (par->codec_type) {
445  case AVMEDIA_TYPE_SUBTITLE:
446  /* XSUB subtitles behave like video tracks, other subtitles
447  * are not (yet) supported. */
448  if (par->codec_id != AV_CODEC_ID_XSUB)
449  break;
450  case AVMEDIA_TYPE_VIDEO:
451  /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
452  if ( !par->codec_tag
453  && par->codec_id == AV_CODEC_ID_RAWVIDEO
454  && par->format == AV_PIX_FMT_RGB555LE
455  && par->bits_per_coded_sample == 15)
456  par->bits_per_coded_sample = 16;
457  avist->pal_offset = avio_tell(pb) + 40;
458  ff_put_bmp_header(pb, par, 0, 0, avi->flipped_raw_rgb);
459  pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
460  par->bits_per_coded_sample);
461  if ( !par->codec_tag
462  && par->codec_id == AV_CODEC_ID_RAWVIDEO
463  && par->format != pix_fmt
464  && par->format != AV_PIX_FMT_NONE)
465  av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
466  av_get_pix_fmt_name(par->format));
467 
468  if (par->format == AV_PIX_FMT_PAL8) {
469  if (par->bits_per_coded_sample < 0 || par->bits_per_coded_sample > 8) {
470  av_log(s, AV_LOG_ERROR, "PAL8 with %d bps is not allowed\n", par->bits_per_coded_sample);
471  return AVERROR(EINVAL);
472  }
473  }
474 
475  break;
476  case AVMEDIA_TYPE_AUDIO:
477  flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
478  if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)
479  return ret;
480  break;
481  default:
482  av_log(s, AV_LOG_ERROR,
483  "Invalid or not supported codec type '%s' found in the input\n",
484  (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));
485  return AVERROR(EINVAL);
486  }
487  ff_end_tag(pb, strf);
488  if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
489  ff_riff_write_info_tag(s->pb, "strn", t->value);
490  t = NULL;
491  }
492  if (par->codec_id == AV_CODEC_ID_XSUB
493  && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
494  const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);
495  t = NULL;
496  if (langstr) {
497  char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
498  if (!str)
499  return AVERROR(ENOMEM);
500  ff_riff_write_info_tag(s->pb, "strn", str);
501  av_free(str);
502  }
503  }
504  }
505 
506  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
507  write_odml_master(s, i);
508  }
509 
510  if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
511  st->sample_aspect_ratio.num > 0 &&
512  st->sample_aspect_ratio.den > 0) {
513  int vprp = ff_start_tag(pb, "vprp");
514  AVRational dar = av_mul_q(st->sample_aspect_ratio,
515  (AVRational) { par->width,
516  par->height });
517  int num, den, fields, i;
518  av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
519  if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_BB ||
520  par->field_order == AV_FIELD_TB || par->field_order == AV_FIELD_BT) {
521  fields = 2; // interlaced
522  } else {
523  fields = 1; // progressive
524  }
525 
526  avio_wl32(pb, 0); // video format = unknown
527  avio_wl32(pb, 0); // video standard = unknown
528  // TODO: should be avg_frame_rate
529  avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
530  avio_wl32(pb, par->width);
531  avio_wl32(pb, par->height);
532  avio_wl16(pb, den);
533  avio_wl16(pb, num);
534  avio_wl32(pb, par->width);
535  avio_wl32(pb, par->height);
536  avio_wl32(pb, fields); // fields per frame
537 
538  for (i = 0; i < fields; i++) {
539  int start_line;
540  // OpenDML v1.02 is not very specific on what value to use for
541  // start_line when frame data is not coming from a capturing device,
542  // so just use 0/1 depending on the field order for interlaced frames
543  if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_TB) {
544  start_line = (i == 0) ? 0 : 1;
545  } else if (par->field_order == AV_FIELD_BB || par->field_order == AV_FIELD_BT) {
546  start_line = (i == 0) ? 1 : 0;
547  } else {
548  start_line = 0;
549  }
550 
551  avio_wl32(pb, par->height / fields); // compressed bitmap height
552  avio_wl32(pb, par->width); // compressed bitmap width
553  avio_wl32(pb, par->height / fields); // valid bitmap height
554  avio_wl32(pb, par->width); // valid bitmap width
555  avio_wl32(pb, 0); // valid bitmap X offset
556  avio_wl32(pb, 0); // valid bitmap Y offset
557  avio_wl32(pb, 0); // valid X offset in T
558  avio_wl32(pb, start_line); // valid Y start line
559  }
560  ff_end_tag(pb, vprp);
561  }
562 
563  ff_end_tag(pb, list2);
564  }
565 
566  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
567  /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
568  avi->odml_list = ff_start_tag(pb, "JUNK");
569  ffio_wfourcc(pb, "odml");
570  ffio_wfourcc(pb, "dmlh");
571  avio_wl32(pb, 248);
572  for (i = 0; i < 248; i += 4)
573  avio_wl32(pb, 0);
574  ff_end_tag(pb, avi->odml_list);
575  }
576 
577  ff_end_tag(pb, list1);
578 
579  ff_riff_write_info(s);
580 
581 
582  padding = s->metadata_header_padding;
583  if (padding < 0)
584  padding = 1016;
585 
586  /* some padding for easier tag editing */
587  if (padding) {
588  list2 = ff_start_tag(pb, "JUNK");
589  for (i = padding; i > 0; i -= 4)
590  avio_wl32(pb, 0);
591  ff_end_tag(pb, list2);
592  }
593 
594  avi->movi_list = ff_start_tag(pb, "LIST");
595  ffio_wfourcc(pb, "movi");
596 
597  return 0;
598 }
599 
600 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
601 {
602  AVIOContext *pb = s->pb;
603  AVIContext *avi = s->priv_data;
604  AVIStream *avist = s->streams[stream_index]->priv_data;
605  int64_t pos;
606  int au_byterate, au_ssize, au_scale;
607 
608  pos = avio_tell(pb);
609 
610  /* Updating one entry in the AVI OpenDML master index */
611  avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
612  ffio_wfourcc(pb, "indx"); /* enabling this entry */
613  avio_skip(pb, 8);
614  avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
615  avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
616  avio_wl64(pb, ix); /* qwOffset */
617  avio_wl32(pb, size); /* dwSize */
618  ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
619  if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
620  uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
621  if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
622  avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
623  avist->sample_requested = 1;
624  }
625  avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
626  } else
627  avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
628 
629  avio_seek(pb, pos, SEEK_SET);
630 }
631 
632 static int avi_write_ix(AVFormatContext *s)
633 {
634  AVIOContext *pb = s->pb;
635  AVIContext *avi = s->priv_data;
636  char tag[5];
637  char ix_tag[] = "ix00";
638  int i, j;
639 
640  av_assert0(pb->seekable & AVIO_SEEKABLE_NORMAL);
641 
642  for (i = 0; i < s->nb_streams; i++) {
643  AVIStream *avist = s->streams[i]->priv_data;
644  if (avi->riff_id - avist->indexes.master_odml_riff_id_base == avi->master_index_max_size) {
645  int64_t pos;
646  int size = AVI_MASTER_INDEX_PREFIX_SIZE + AVI_MASTER_INDEX_ENTRY_SIZE * avi->master_index_max_size;
647 
648  pos = avio_tell(pb);
649  update_odml_entry(s, i, pos, size);
650  write_odml_master(s, i);
651  av_assert1(avio_tell(pb) - pos == size);
652  avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
653  }
654  av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < avi->master_index_max_size);
655  }
656 
657  for (i = 0; i < s->nb_streams; i++) {
658  AVIStream *avist = s->streams[i]->priv_data;
659  int64_t ix;
660 
661  avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);
662  ix_tag[3] = '0' + i;
663 
664  /* Writing AVI OpenDML leaf index chunk */
665  ix = avio_tell(pb);
666  ffio_wfourcc(pb, ix_tag); /* ix?? */
667  avio_wl32(pb, avist->indexes.entry * 8 + 24);
668  /* chunk size */
669  avio_wl16(pb, 2); /* wLongsPerEntry */
670  avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
671  avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
672  avio_wl32(pb, avist->indexes.entry);
673  /* nEntriesInUse */
674  ffio_wfourcc(pb, tag); /* dwChunkId */
675  avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
676  avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
677 
678  for (j = 0; j < avist->indexes.entry; j++) {
679  AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
680  avio_wl32(pb, ie->pos + 8);
681  avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
682  (ie->flags & 0x10 ? 0 : 0x80000000));
683  }
684 
685  update_odml_entry(s, i, ix, avio_tell(pb) - ix);
686  }
687  return 0;
688 }
689 
690 static int avi_write_idx1(AVFormatContext *s)
691 {
692  AVIOContext *pb = s->pb;
693  AVIContext *avi = s->priv_data;
694  int64_t idx_chunk;
695  int i;
696  char tag[5];
697 
698  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
699  AVIStream *avist;
700  AVIIentry *ie = 0, *tie;
701  int empty, stream_id = -1;
702 
703  idx_chunk = ff_start_tag(pb, "idx1");
704  for (i = 0; i < s->nb_streams; i++) {
705  avist = s->streams[i]->priv_data;
706  avist->entry = 0;
707  }
708 
709  do {
710  empty = 1;
711  for (i = 0; i < s->nb_streams; i++) {
712  avist = s->streams[i]->priv_data;
713  if (avist->indexes.entry <= avist->entry)
714  continue;
715 
716  tie = avi_get_ientry(&avist->indexes, avist->entry);
717  if (empty || tie->pos < ie->pos) {
718  ie = tie;
719  stream_id = i;
720  }
721  empty = 0;
722  }
723  if (!empty) {
724  avist = s->streams[stream_id]->priv_data;
725  if (*ie->tag)
726  ffio_wfourcc(pb, ie->tag);
727  else {
728  avi_stream2fourcc(tag, stream_id,
729  s->streams[stream_id]->codecpar->codec_type);
730  ffio_wfourcc(pb, tag);
731  }
732  avio_wl32(pb, ie->flags);
733  avio_wl32(pb, ie->pos);
734  avio_wl32(pb, ie->len);
735  avist->entry++;
736  }
737  } while (!empty);
738  ff_end_tag(pb, idx_chunk);
739 
740  avi_write_counters(s, avi->riff_id);
741  }
742  return 0;
743 }
744 
745 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
746 {
747  AVIContext *avi = s->priv_data;
748  AVIStream *avist = s->streams[stream_index]->priv_data;
749  AVCodecParameters *par = s->streams[stream_index]->codecpar;
750 
751  ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
752  while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&
753  dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
754 
755  if (dts - avist->packet_count > 60000) {
756  av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
757  return AVERROR(EINVAL);
758  }
759 
760  avi->empty_packet->stream_index = stream_index;
761  avi_write_packet_internal(s, avi->empty_packet);
762  ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
763  }
764 
765  return 0;
766 }
767 
768 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
769 {
770  const int stream_index = pkt->stream_index;
771  AVCodecParameters *par = s->streams[stream_index]->codecpar;
772  int ret;
773 
774  if (par->codec_id == AV_CODEC_ID_H264 && par->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
775  ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
776  if (ret < 0)
777  return ret;
778  }
779 
780  if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
781  return ret;
782 
783  if (!pkt->size)
784  return avi_write_packet_internal(s, pkt); /* Passthrough */
785 
786  if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
787  AVIStream *avist = s->streams[stream_index]->priv_data;
788  AVIOContext *pb = s->pb;
789  AVPacket *opkt = pkt;
790  int reshuffle_ret;
791  if (par->codec_id == AV_CODEC_ID_RAWVIDEO && par->codec_tag == 0) {
792  int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;
793  int expected_stride = ((par->width * bpc + 31) >> 5)*4;
794  reshuffle_ret = ff_reshuffle_raw_rgb(s, &pkt, par, expected_stride);
795  if (reshuffle_ret < 0)
796  return reshuffle_ret;
797  } else
798  reshuffle_ret = 0;
799  if (par->format == AV_PIX_FMT_PAL8) {
800  ret = ff_get_packet_palette(s, opkt, reshuffle_ret, avist->palette);
801  if (ret < 0)
802  goto fail;
803  if (ret) {
804  int pal_size = 1 << par->bits_per_coded_sample;
805  int pc_tag, i;
806 
807  av_assert0(par->bits_per_coded_sample >= 0 && par->bits_per_coded_sample <= 8);
808 
809  if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && avist->pal_offset) {
810  int64_t cur_offset = avio_tell(pb);
811  avio_seek(pb, avist->pal_offset, SEEK_SET);
812  for (i = 0; i < pal_size; i++) {
813  uint32_t v = avist->palette[i];
814  avio_wl32(pb, v & 0xffffff);
815  }
816  avio_seek(pb, cur_offset, SEEK_SET);
817  memcpy(avist->old_palette, avist->palette, pal_size * 4);
818  avist->pal_offset = 0;
819  }
820  if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {
821  unsigned char tag[5];
822  avi_stream2fourcc(tag, stream_index, par->codec_type);
823  tag[2] = 'p'; tag[3] = 'c';
824  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
825  if (avist->strh_flags_offset) {
826  int64_t cur_offset = avio_tell(pb);
827  avio_seek(pb, avist->strh_flags_offset, SEEK_SET);
828  avio_wl32(pb, AVISF_VIDEO_PALCHANGES);
829  avio_seek(pb, cur_offset, SEEK_SET);
830  avist->strh_flags_offset = 0;
831  }
832  ret = avi_add_ientry(s, stream_index, tag, AVIIF_NO_TIME,
833  pal_size * 4 + 4);
834  if (ret < 0)
835  goto fail;
836  }
837  pc_tag = ff_start_tag(pb, tag);
838  avio_w8(pb, 0);
839  avio_w8(pb, pal_size & 0xFF);
840  avio_wl16(pb, 0); // reserved
841  for (i = 0; i < pal_size; i++) {
842  uint32_t v = avist->palette[i];
843  avio_wb32(pb, v<<8);
844  }
845  ff_end_tag(pb, pc_tag);
846  memcpy(avist->old_palette, avist->palette, pal_size * 4);
847  }
848  }
849  }
850  if (reshuffle_ret) {
851  ret = avi_write_packet_internal(s, pkt);
852 
853 fail:
854  if (reshuffle_ret)
855  av_packet_free(&pkt);
856  return ret;
857  }
858  }
859 
860  return avi_write_packet_internal(s, pkt);
861 }
862 
863 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
864 {
865  unsigned char tag[5];
866  unsigned int flags = 0;
867  const int stream_index = pkt->stream_index;
868  int size = pkt->size;
869  AVIContext *avi = s->priv_data;
870  AVIOContext *pb = s->pb;
871  AVIStream *avist = s->streams[stream_index]->priv_data;
872  AVCodecParameters *par = s->streams[stream_index]->codecpar;
873 
874  if (pkt->dts != AV_NOPTS_VALUE)
875  avist->last_dts = pkt->dts + pkt->duration;
876 
877  avist->packet_count++;
878 
879  // Make sure to put an OpenDML chunk when the file size exceeds the limits
880  if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
881  (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
882  avi_write_ix(s);
883  ff_end_tag(pb, avi->movi_list);
884 
885  if (avi->riff_id == 1)
886  avi_write_idx1(s);
887 
888  ff_end_tag(pb, avi->riff_start);
889  avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
890  }
891 
892  avi_stream2fourcc(tag, stream_index, par->codec_type);
893  if (pkt->flags & AV_PKT_FLAG_KEY)
894  flags = 0x10;
895  if (par->codec_type == AVMEDIA_TYPE_AUDIO)
896  avist->audio_strm_length += size;
897 
898  if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
899  int ret;
900  ret = avi_add_ientry(s, stream_index, NULL, flags, size);
901  if (ret < 0)
902  return ret;
903  }
904 
905  avio_write(pb, tag, 4);
906  avio_wl32(pb, size);
907  avio_write(pb, pkt->data, size);
908  if (size & 1)
909  avio_w8(pb, 0);
910 
911  return 0;
912 }
913 
914 static int avi_write_trailer(AVFormatContext *s)
915 {
916  AVIContext *avi = s->priv_data;
917  AVIOContext *pb = s->pb;
918  int res = 0;
919  int i, n, nb_frames;
920  int64_t file_size;
921 
922  for (i = 0; i < s->nb_streams; i++) {
923  AVIStream *avist = s->streams[i]->priv_data;
924  write_skip_frames(s, i, avist->last_dts);
925  }
926 
927  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
928  if (avi->riff_id == 1) {
929  ff_end_tag(pb, avi->movi_list);
930  res = avi_write_idx1(s);
931  ff_end_tag(pb, avi->riff_start);
932  } else {
933  avi_write_ix(s);
934  ff_end_tag(pb, avi->movi_list);
935  ff_end_tag(pb, avi->riff_start);
936 
937  file_size = avio_tell(pb);
938  avio_seek(pb, avi->odml_list - 8, SEEK_SET);
939  ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
940  avio_skip(pb, 16);
941 
942  for (n = nb_frames = 0; n < s->nb_streams; n++) {
943  AVCodecParameters *par = s->streams[n]->codecpar;
944  AVIStream *avist = s->streams[n]->priv_data;
945 
946  if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
947  if (nb_frames < avist->packet_count)
948  nb_frames = avist->packet_count;
949  } else {
950  if (par->codec_id == AV_CODEC_ID_MP2 ||
951  par->codec_id == AV_CODEC_ID_MP3)
952  nb_frames += avist->packet_count;
953  }
954  }
955  avio_wl32(pb, nb_frames);
956  avio_seek(pb, file_size, SEEK_SET);
957 
958  avi_write_counters(s, avi->riff_id);
959  }
960  }
961 
962  if (avi->riff_id >= avi->master_index_max_size) {
963  int index_space = AVI_MASTER_INDEX_PREFIX_SIZE +
964  AVI_MASTER_INDEX_ENTRY_SIZE * avi->riff_id;
965  av_log(s, AV_LOG_WARNING, "Output file not strictly OpenDML compliant, "
966  "consider re-muxing with 'reserve_index_space' option value >= %d\n",
967  index_space);
968  }
969 
970  for (i = 0; i < s->nb_streams; i++) {
971  AVIStream *avist = s->streams[i]->priv_data;
972  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
973  avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
974  avio_wl32(pb, avist->max_size);
975  }
976  }
977 
978  return res;
979 }
980 
981 static void avi_deinit(AVFormatContext *s)
982 {
983  AVIContext *avi = s->priv_data;
984 
985  av_packet_free(&avi->empty_packet);
986 
987  for (int i = 0; i < s->nb_streams; i++) {
988  AVIStream *avist = s->streams[i]->priv_data;
989  if (!avist)
990  continue;
991  for (int j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
992  av_freep(&avist->indexes.cluster[j]);
993  av_freep(&avist->indexes.cluster);
994  avist->indexes.ents_allocated = avist->indexes.entry = 0;
995  }
996 }
997 
998 #define OFFSET(x) offsetof(AVIContext, x)
999 #define ENC AV_OPT_FLAG_ENCODING_PARAM
1000 static const AVOption options[] = {
1001  { "reserve_index_space", "reserve space (in bytes) at the beginning of the file for each stream index", OFFSET(reserve_index_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, ENC },
1002  { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
1003  { "flipped_raw_rgb", "Raw RGB bitmaps are stored bottom-up", OFFSET(flipped_raw_rgb), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
1004  { NULL },
1005 };
1006 
1007 static const AVClass avi_muxer_class = {
1008  .class_name = "AVI muxer",
1009  .item_name = av_default_item_name,
1010  .option = options,
1011  .version = LIBAVUTIL_VERSION_INT,
1012 };
1013 
1014 AVOutputFormat ff_avi_muxer = {
1015  .name = "avi",
1016  .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
1017  .mime_type = "video/x-msvideo",
1018  .extensions = "avi",
1019  .priv_data_size = sizeof(AVIContext),
1020  .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
1021  .video_codec = AV_CODEC_ID_MPEG4,
1022  .init = avi_init,
1023  .deinit = avi_deinit,
1024  .write_header = avi_write_header,
1025  .write_packet = avi_write_packet,
1026  .write_trailer = avi_write_trailer,
1027  .codec_tag = ff_riff_codec_tags_list,
1028  .priv_class = &avi_muxer_class,
1029 };
AVI_MASTER_INDEX_PREFIX_SIZE
#define AVI_MASTER_INDEX_PREFIX_SIZE
Definition: avienc.c:54
write_skip_frames
static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
Definition: avienc.c:745
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:729
NULL
#define NULL
Definition: coverity.c:32
AVCodecParameters::field_order
enum AVFieldOrder field_order
Video only.
Definition: codec_par.h:141
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void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:455
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
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static enum AVPixelFormat pix_fmt
Definition: demuxing_decoding.c:40
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#define AVI_MASTER_INDEX_SIZE_DEFAULT
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#define av_realloc_f(p, o, n)
Definition: tableprint_vlc.h:33
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Definition: riffenc.c:38
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Definition: riffenc.c:31
AVOption
AVOption.
Definition: opt.h:248
ff_put_wav_header
int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags)
Write WAVEFORMAT header structure.
Definition: riffenc.c:54
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int master_odml_riff_id_base
Definition: avienc.c:63
ret
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Definition: filter_design.txt:187
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#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
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unsigned int pos
Definition: avienc.c:49
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#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
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int ents_allocated
Definition: avienc.c:62
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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:4999
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Definition: opt.h:225
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#define AVI_MAX_RIFF_SIZE
Definition: avi.h:31
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:39
AVIIndex::audio_strm_offset
int64_t audio_strm_offset
Definition: avienc.c:60
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVStream::sample_aspect_ratio
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:946
AVRational::num
int num
Numerator.
Definition: rational.h:59
AV_PIX_FMT_RGB555LE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
Definition: pixfmt.h:108
AVPacket::size
int size
Definition: packet.h:370
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
avutil.h
Convenience header that includes libavutil&#39;s core.
avi_stream2fourcc
static char * avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
Definition: avienc.c:180
type
GLint GLenum type
Definition: opengl_enc.c:104
AV_CODEC_ID_MPEG4
Definition: codec_id.h:61
AVStream::priv_data
void * priv_data
Definition: avformat.h:899
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
AVIContext::empty_packet
AVPacket * empty_packet
Definition: avienc.c:69
ceil
static __device__ float ceil(float a)
Definition: cuda_runtime.h:176
pkt
AVPacket * pkt
Definition: movenc.c:59
ff_avi_muxer
AVOutputFormat ff_avi_muxer
Definition: avienc.c:1014
index
fg index
Definition: ffmpeg_filter.c:170
AV_CODEC_ID_H264
Definition: codec_id.h:76
AVIStream::frames_hdr_strm
int64_t frames_hdr_strm
Definition: avienc.c:80
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
AVFormatContext
Format I/O context.
Definition: avformat.h:1247
AVIContext::odml_list
int64_t odml_list
Definition: avienc.c:70
AVClass::class_name
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
AVIF_ISINTERLEAVED
#define AVIF_ISINTERLEAVED
Definition: avi.h:26
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
dict.h
Public dictionary API.
AV_FIELD_TB
Definition: codec_par.h:41
av_packet_free
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
Definition: avpacket.c:75
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:375
av_cold
#define av_cold
Definition: attributes.h:88
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
Definition: avutil.h:203
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:126
AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
opt.h
AVOptions.
timestamp.h
timestamp utils, mostly useful for debugging/logging purposes
avi_add_ientry
static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag, unsigned int flags, unsigned int size)
Definition: avienc.c:107
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
AVIContext::movi_list
int64_t movi_list
Definition: avidec.c:74
OFFSET
#define OFFSET(x)
Definition: avienc.c:998
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1315
AV_FIELD_TT
Definition: codec_par.h:39
avio_internal.h
av_dict_get
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
AVPacket::data
uint8_t * data
Definition: packet.h:369
AVIContext::riff_start
int64_t riff_start
Definition: avienc.c:70
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
avi_start_new_riff
static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb, const char *riff_tag, const char *list_tag)
Definition: avienc.c:159
size
ptrdiff_t size
Definition: opengl_enc.c:100
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
av_reduce
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
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:225
ffio_wfourcc
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
Definition: avio_internal.h:58
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
avi_muxer_class
static const AVClass avi_muxer_class
Definition: avienc.c:1007
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
avio_wl64
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:443
av_x_if_null
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:308
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
AVIStream::old_palette
uint32_t old_palette[AVPALETTE_COUNT]
Definition: avienc.c:94
ENC
#define ENC
Definition: avienc.c:999
AVI_MAX_STREAM_COUNT
#define AVI_MAX_STREAM_COUNT
Definition: avi.h:32
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
avi_write_idx1
static int avi_write_idx1(AVFormatContext *s)
Definition: avienc.c:690
AVIContext::master_index_max_size
int master_index_max_size
Definition: avienc.c:74
ff_parse_specific_params
void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale)
Definition: riffenc.c:272
ff_check_h264_startcode
int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
Check presence of H264 startcode.
Definition: mpegtsenc.c:1588
ff_convert_lang_to
const char * ff_convert_lang_to(const char *lang, enum AVLangCodespace target_codespace)
Convert a language code to a target codespace.
Definition: avlanguage.c:736
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:117
ff_riff_write_info_tag
void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
Write a single RIFF info tag.
Definition: riffenc.c:302
AVIIentry::tag
char tag[4]
Definition: avienc.c:47
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
video_st
AVStream * video_st
Definition: movenc.c:60
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:425
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
AVIIentry::flags
unsigned int flags
Definition: avienc.c:48
FFMAX
#define FFMAX(a, b)
Definition: common.h:103
fail
#define fail()
Definition: checkasm.h:133
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
AVIStream::packet_count
int packet_count
Definition: avienc.c:82
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
AVIIentry::len
unsigned int len
Definition: avienc.c:50
internal.h
common internal API header
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1303
update_odml_entry
static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
Definition: avienc.c:600
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:177
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
fields
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the then the processing requires a frame on this link and the filter is expected to make efforts in that direction The status of input links is stored by the fifo and status_out fields
Definition: filter_design.txt:154
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
raw.h
Raw Video Codec.
AVIContext::flipped_raw_rgb
int flipped_raw_rgb
Definition: avienc.c:76
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:98
AVOutputFormat::name
const char * name
Definition: avformat.h:500
ff_get_packet_palette
int ff_get_packet_palette(AVFormatContext *s, AVPacket *pkt, int ret, uint32_t *palette)
Retrieves the palette from a packet, either from side data, or appended to the video data in the pack...
Definition: utils.c:5784
riff.h
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
AV_OPT_TYPE_BOOL
Definition: opt.h:242
avi_write_trailer
static int avi_write_trailer(AVFormatContext *s)
Definition: avienc.c:914
s
#define s(width, name)
Definition: cbs_vp9.c:257
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:948
AV_FIELD_BT
Definition: codec_par.h:42
AV_CODEC_ID_XSUB
Definition: codec_id.h:526
AVIIndex::indx_start
int64_t indx_start
Definition: avienc.c:59
AVIStream::audio_strm_length
int64_t audio_strm_length
Definition: avienc.c:81
avi_write_header
static int avi_write_header(AVFormatContext *s)
Definition: avienc.c:260
AVIF_HASINDEX
#define AVIF_HASINDEX
Definition: avi.h:24
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext::metadata_header_padding
int metadata_header_padding
Number of bytes to be written as padding in a metadata header.
Definition: avformat.h:1761
AVStream
Stream structure.
Definition: avformat.h:884
AVIStream::pal_offset
int64_t pal_offset
Definition: avienc.c:95
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
avi_write_packet
static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: avienc.c:768
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
avpriv_find_pix_fmt
enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
Definition: utils.c:421
avi_init
static av_cold int avi_init(struct AVFormatContext *s)
Definition: avienc.c:144
AV_TIME_BASE_Q
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1289
options
static const AVOption options[]
Definition: avienc.c:1000
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:203
AVIStream::sample_requested
int sample_requested
Definition: avienc.c:85
AV_CODEC_ID_AC3
Definition: codec_id.h:427
AVIIF_NO_TIME
#define AVIIF_NO_TIME
Definition: avi.h:39
ff_riff_write_info
void ff_riff_write_info(AVFormatContext *s)
Write all recognized RIFF tags from s->metadata.
Definition: riffenc.c:334
AV_STRINGIFY
#define AV_STRINGIFY(s)
Definition: macros.h:36
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVI_INDEX_CLUSTER_SIZE
#define AVI_INDEX_CLUSTER_SIZE
Definition: avienc.c:53
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_riff_codec_tags_list
const AVCodecTag *const ff_riff_codec_tags_list[]
AVI_MASTER_INDEX_ENTRY_SIZE
#define AVI_MASTER_INDEX_ENTRY_SIZE
Definition: avienc.c:55
AVMediaType
AVMediaType
Definition: avutil.h:199
avi_deinit
static void avi_deinit(AVFormatContext *s)
Definition: avienc.c:981
AV_CODEC_ID_MP2
Definition: codec_id.h:424
avi_get_ientry
static AVIIentry * avi_get_ientry(const AVIIndex *idx, int ent_id)
Definition: avienc.c:100
AVPALETTE_COUNT
#define AVPALETTE_COUNT
Definition: pixfmt.h:33
AVIStream::strh_flags_offset
int64_t strh_flags_offset
Definition: avienc.c:91
write_odml_master
static void write_odml_master(AVFormatContext *s, int stream_index)
Definition: avienc.c:232
convert_header.str
string str
Definition: convert_header.py:20
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
AVIIndex::cluster
AVIIentry ** cluster
Definition: avienc.c:64
av_get_media_type_string
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:76
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:933
bitrate
int64_t bitrate
Definition: h264_levels.c:131
avi_write_packet_internal
static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
Definition: avienc.c:863
avformat.h
Main libavformat public API header.
AV_FIELD_BB
Definition: codec_par.h:40
AVIContext::write_channel_mask
int write_channel_mask
Definition: avienc.c:75
ff_put_bmp_header
void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par, int for_asf, int ignore_extradata, int rgb_frame_is_flipped)
Definition: riffenc.c:215
AVRational::den
int den
Denominator.
Definition: rational.h:60
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVIContext::reserve_index_space
int reserve_index_space
Definition: avienc.c:73
AVDictionaryEntry::value
char * value
Definition: dict.h:87
av_ts2str
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
AVIContext::frames_hdr_all
int64_t frames_hdr_all
Definition: avienc.c:71
avpriv_pix_fmt_bps_avi
const PixelFormatTag avpriv_pix_fmt_bps_avi[]
Definition: raw.c:316
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1275
av_packet_alloc
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
Definition: avpacket.c:64
FF_PUT_WAV_HEADER_SKIP_CHANNELMASK
#define FF_PUT_WAV_HEADER_SKIP_CHANNELMASK
Tell ff_put_wav_header() to write an empty channel mask.
Definition: riff.h:59
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:346
AVIStream::entry
int entry
Definition: avienc.c:83
ff_reshuffle_raw_rgb
int ff_reshuffle_raw_rgb(AVFormatContext *s, AVPacket **ppkt, AVCodecParameters *par, int expected_stride)
Reshuffles the lines to use the user specified stride.
Definition: rawutils.c:25
AVIStream::indexes
AVIIndex indexes
Definition: avienc.c:89
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
avi_write_counters
static int avi_write_counters(AVFormatContext *s, int riff_id)
Definition: avienc.c:199
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:368
av_mul_q
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
avio_wb32
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:383
AVFormatContext::duration
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1362
AVIF_TRUSTCKTYPE
#define AVIF_TRUSTCKTYPE
Definition: avi.h:27
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1049
AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:62
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
AVIIndex::entry
int entry
Definition: avienc.c:61
AVIStream::palette
uint32_t palette[AVPALETTE_COUNT]
Definition: avienc.c:93
av_get_pix_fmt_name
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:2489
AVPacket::stream_index
int stream_index
Definition: packet.h:371
AVIStream::max_size
int max_size
Definition: avienc.c:84
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
AVIStream::last_dts
int64_t last_dts
Definition: avienc.c:87
AVMEDIA_TYPE_SUBTITLE
Definition: avutil.h:204
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:478
id
enum AVCodecID id
Definition: extract_extradata_bsf.c:325
AVISF_VIDEO_PALCHANGES
#define AVISF_VIDEO_PALCHANGES
Definition: avi.h:35
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AVPacket
This structure stores compressed data.
Definition: packet.h:346
avi_write_ix
static int avi_write_ix(AVFormatContext *s)
Definition: avienc.c:632
AV_LANG_ISO639_1
3-char terminological language codes as per ISO-IEC 639-2
Definition: avlanguage.h:30
i
int i
Definition: input.c:407
AVIContext::riff_id
int riff_id
Definition: avienc.c:72
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
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