FFmpeg: libavformat/webmdashenc.c Source File

FFmpeg
webmdashenc.c
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1 /*
2  * WebM DASH Manifest XML muxer
3  * Copyright (c) 2014 Vignesh Venkatasubramanian
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 /*
23  * WebM DASH Specification:
24  * https://sites.google.com/a/webmproject.org/wiki/adaptive-streaming/webm-dash-specification
25  * ISO DASH Specification:
26  * http://standards.iso.org/ittf/PubliclyAvailableStandards/c065274_ISO_IEC_23009-1_2014.zip
27  */
28 
29 #include <float.h>
30 #include <stdint.h>
31 #include <string.h>
32 
33 #include "avformat.h"
34 #include "avio_internal.h"
35 #include "matroska.h"
36 
37 #include "libavutil/avstring.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/opt.h"
40 #include "libavutil/time_internal.h"
41 
42 typedef struct AdaptationSet {
43  char id[10];
44   int *streams;
45   int nb_streams;
46 } AdaptationSet;
47 
48  typedef struct WebMDashMuxContext {
49   const AVClass *class;
50   char *adaptation_sets;
51   AdaptationSet *as;
52   int nb_as;
53   int representation_id;
54   int is_live;
55   int chunk_start_index;
56   int chunk_duration;
57   char *utc_timing_url;
58   double time_shift_buffer_depth;
59   int minimum_update_period;
60   int debug_mode;
61 } WebMDashMuxContext;
62 
63  static const char *get_codec_name(int codec_id)
64 {
65  switch (codec_id) {
66  case AV_CODEC_ID_VP8:
67  return "vp8";
68  case AV_CODEC_ID_VP9:
69  return "vp9";
70  case AV_CODEC_ID_VORBIS:
71  return "vorbis";
72  case AV_CODEC_ID_OPUS:
73  return "opus";
74  }
75  return NULL;
76 }
77 
78  static double get_duration(AVFormatContext *s)
79 {
80  int i = 0;
81  double max = 0.0;
82  for (i = 0; i < s->nb_streams; i++) {
83  AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata,
84  DURATION, NULL, 0);
85  if (!duration || atof(duration->value) < 0) continue;
86  if (atof(duration->value) > max) max = atof(duration->value);
87  }
88  return max / 1000;
89 }
90 
91  static int write_header(AVFormatContext *s)
92 {
93  WebMDashMuxContext *w = s->priv_data;
94  double min_buffer_time = 1.0;
95  avio_printf(s->pb, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
96  avio_printf(s->pb, "<MPD\n");
97  avio_printf(s->pb, " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n");
98  avio_printf(s->pb, " xmlns=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
99  avio_printf(s->pb, " xsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
100  avio_printf(s->pb, " type=\"%s\"\n", w->is_live ? "dynamic" : "static");
101  if (!w->is_live) {
102  avio_printf(s->pb, " mediaPresentationDuration=\"PT%gS\"\n",
103  get_duration(s));
104  }
105  avio_printf(s->pb, " minBufferTime=\"PT%gS\"\n", min_buffer_time);
106  avio_printf(s->pb, " profiles=\"%s\"%s",
107  w->is_live ? "urn:mpeg:dash:profile:isoff-live:2011" : "urn:webm:dash:profile:webm-on-demand:2012",
108  w->is_live ? "\n" : ">\n");
109  if (w->is_live) {
110  time_t local_time = time(NULL);
111  struct tm gmt_buffer;
112  struct tm *gmt = gmtime_r(&local_time, &gmt_buffer);
113  char gmt_iso[21];
114  if (!strftime(gmt_iso, 21, "%Y-%m-%dT%H:%M:%SZ", gmt)) {
115  return AVERROR_UNKNOWN;
116  }
117  if (w->debug_mode) {
118  av_strlcpy(gmt_iso, "", 1);
119  }
120  avio_printf(s->pb, " availabilityStartTime=\"%s\"\n", gmt_iso);
121  avio_printf(s->pb, " timeShiftBufferDepth=\"PT%gS\"\n", w->time_shift_buffer_depth);
122  avio_printf(s->pb, " minimumUpdatePeriod=\"PT%dS\"", w->minimum_update_period);
123  avio_printf(s->pb, ">\n");
124  if (w->utc_timing_url) {
125  avio_printf(s->pb, "<UTCTiming\n");
126  avio_printf(s->pb, " schemeIdUri=\"urn:mpeg:dash:utc:http-iso:2014\"\n");
127  avio_printf(s->pb, " value=\"%s\"/>\n", w->utc_timing_url);
128  }
129  }
130  return 0;
131 }
132 
133  static void write_footer(AVFormatContext *s)
134 {
135  avio_printf(s->pb, "</MPD>\n");
136 }
137 
138  static int subsegment_alignment(AVFormatContext *s, AdaptationSet *as) {
139  int i;
140  AVDictionaryEntry *gold = av_dict_get(s->streams[as->streams[0]]->metadata,
141  CUE_TIMESTAMPS, NULL, 0);
142  if (!gold) return 0;
143  for (i = 1; i < as->nb_streams; i++) {
144  AVDictionaryEntry *ts = av_dict_get(s->streams[as->streams[i]]->metadata,
145  CUE_TIMESTAMPS, NULL, 0);
146  if (!ts || strncmp(gold->value, ts->value, strlen(gold->value))) return 0;
147  }
148  return 1;
149 }
150 
151  static int bitstream_switching(AVFormatContext *s, AdaptationSet *as) {
152  int i;
153  AVDictionaryEntry *gold_track_num = av_dict_get(s->streams[as->streams[0]]->metadata,
154  TRACK_NUMBER, NULL, 0);
155  AVCodecParameters *gold_par = s->streams[as->streams[0]]->codecpar;
156  if (!gold_track_num) return 0;
157  for (i = 1; i < as->nb_streams; i++) {
158  AVDictionaryEntry *track_num = av_dict_get(s->streams[as->streams[i]]->metadata,
159  TRACK_NUMBER, NULL, 0);
160  AVCodecParameters *par = s->streams[as->streams[i]]->codecpar;
161  if (!track_num ||
162  strncmp(gold_track_num->value, track_num->value, strlen(gold_track_num->value)) ||
163  gold_par->codec_id != par->codec_id ||
164  gold_par->extradata_size != par->extradata_size ||
165  memcmp(gold_par->extradata, par->extradata, par->extradata_size)) {
166  return 0;
167  }
168  }
169  return 1;
170 }
171 
172 /*
173  * Writes a Representation within an Adaptation Set. Returns 0 on success and
174  * < 0 on failure.
175  */
176  static int write_representation(AVFormatContext *s, AVStream *stream, char *id,
177  int output_width, int output_height,
178  int output_sample_rate) {
179  WebMDashMuxContext *w = s->priv_data;
180  AVDictionaryEntry *irange = av_dict_get(stream->metadata, INITIALIZATION_RANGE, NULL, 0);
181  AVDictionaryEntry *cues_start = av_dict_get(stream->metadata, CUES_START, NULL, 0);
182  AVDictionaryEntry *cues_end = av_dict_get(stream->metadata, CUES_END, NULL, 0);
183  AVDictionaryEntry *filename = av_dict_get(stream->metadata, FILENAME, NULL, 0);
184  AVDictionaryEntry *bandwidth = av_dict_get(stream->metadata, BANDWIDTH, NULL, 0);
185  const char *bandwidth_str;
186  if ((w->is_live && (!filename)) ||
187  (!w->is_live && (!irange || !cues_start || !cues_end || !filename || !bandwidth))) {
188  return AVERROR_INVALIDDATA;
189  }
190  avio_printf(s->pb, "<Representation id=\"%s\"", id);
191  // if bandwidth for live was not provided, use a default
192  if (w->is_live && !bandwidth) {
193  bandwidth_str = (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) ? "128000" : "1000000";
194  } else {
195  bandwidth_str = bandwidth->value;
196  }
197  avio_printf(s->pb, " bandwidth=\"%s\"", bandwidth_str);
198  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && output_width)
199  avio_printf(s->pb, " width=\"%d\"", stream->codecpar->width);
200  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && output_height)
201  avio_printf(s->pb, " height=\"%d\"", stream->codecpar->height);
202  if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && output_sample_rate)
203  avio_printf(s->pb, " audioSamplingRate=\"%d\"", stream->codecpar->sample_rate);
204  if (w->is_live) {
205  // For live streams, Codec and Mime Type always go in the Representation tag.
206  avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(stream->codecpar->codec_id));
207  avio_printf(s->pb, " mimeType=\"%s/webm\"",
208  stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
209  // For live streams, subsegments always start with key frames. So this
210  // is always 1.
211  avio_printf(s->pb, " startsWithSAP=\"1\"");
212  avio_printf(s->pb, ">");
213  } else {
214  avio_printf(s->pb, ">\n");
215  avio_printf(s->pb, "<BaseURL>%s</BaseURL>\n", filename->value);
216  avio_printf(s->pb, "<SegmentBase\n");
217  avio_printf(s->pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value);
218  avio_printf(s->pb, "<Initialization\n");
219  avio_printf(s->pb, " range=\"0-%s\" />\n", irange->value);
220  avio_printf(s->pb, "</SegmentBase>\n");
221  }
222  avio_printf(s->pb, "</Representation>\n");
223  return 0;
224 }
225 
226 /*
227  * Checks if width of all streams are the same. Returns 1 if true, 0 otherwise.
228  */
229  static int check_matching_width(AVFormatContext *s, AdaptationSet *as) {
230  int first_width, i;
231  if (as->nb_streams < 2) return 1;
232  first_width = s->streams[as->streams[0]]->codecpar->width;
233  for (i = 1; i < as->nb_streams; i++)
234  if (first_width != s->streams[as->streams[i]]->codecpar->width)
235  return 0;
236  return 1;
237 }
238 
239 /*
240  * Checks if height of all streams are the same. Returns 1 if true, 0 otherwise.
241  */
242  static int check_matching_height(AVFormatContext *s, AdaptationSet *as) {
243  int first_height, i;
244  if (as->nb_streams < 2) return 1;
245  first_height = s->streams[as->streams[0]]->codecpar->height;
246  for (i = 1; i < as->nb_streams; i++)
247  if (first_height != s->streams[as->streams[i]]->codecpar->height)
248  return 0;
249  return 1;
250 }
251 
252 /*
253  * Checks if sample rate of all streams are the same. Returns 1 if true, 0 otherwise.
254  */
255  static int check_matching_sample_rate(AVFormatContext *s, AdaptationSet *as) {
256  int first_sample_rate, i;
257  if (as->nb_streams < 2) return 1;
258  first_sample_rate = s->streams[as->streams[0]]->codecpar->sample_rate;
259  for (i = 1; i < as->nb_streams; i++)
260  if (first_sample_rate != s->streams[as->streams[i]]->codecpar->sample_rate)
261  return 0;
262  return 1;
263 }
264 
265  static void free_adaptation_sets(AVFormatContext *s) {
266  WebMDashMuxContext *w = s->priv_data;
267  int i;
268  for (i = 0; i < w->nb_as; i++) {
269  av_freep(&w->as[i].streams);
270  }
271  av_freep(&w->as);
272  w->nb_as = 0;
273 }
274 
275 /*
276  * Parses a live header filename and computes the representation id,
277  * initialization pattern and the media pattern. Pass NULL if you don't want to
278  * compute any of those 3. Returns 0 on success and non-zero on failure.
279  *
280  * Name of the header file should conform to the following pattern:
281  * <file_description>_<representation_id>.hdr where <file_description> can be
282  * anything. The chunks should be named according to the following pattern:
283  * <file_description>_<representation_id>_<chunk_number>.chk
284  */
285  static int parse_filename(char *filename, char **representation_id,
286  char **initialization_pattern, char **media_pattern) {
287  char *underscore_pos = NULL;
288  char *period_pos = NULL;
289  char *temp_pos = NULL;
290  char *filename_str = av_strdup(filename);
291  int ret = 0;
292 
293  if (!filename_str) {
294  ret = AVERROR(ENOMEM);
295  goto end;
296  }
297  temp_pos = av_stristr(filename_str, "_");
298  while (temp_pos) {
299  underscore_pos = temp_pos + 1;
300  temp_pos = av_stristr(temp_pos + 1, "_");
301  }
302  if (!underscore_pos) {
303  ret = AVERROR_INVALIDDATA;
304  goto end;
305  }
306  period_pos = av_stristr(underscore_pos, ".");
307  if (!period_pos) {
308  ret = AVERROR_INVALIDDATA;
309  goto end;
310  }
311  *(underscore_pos - 1) = 0;
312  if (representation_id) {
313  *representation_id = av_malloc(period_pos - underscore_pos + 1);
314  if (!(*representation_id)) {
315  ret = AVERROR(ENOMEM);
316  goto end;
317  }
318  av_strlcpy(*representation_id, underscore_pos, period_pos - underscore_pos + 1);
319  }
320  if (initialization_pattern) {
321  *initialization_pattern = av_asprintf("%s_$RepresentationID$.hdr",
322  filename_str);
323  if (!(*initialization_pattern)) {
324  ret = AVERROR(ENOMEM);
325  goto end;
326  }
327  }
328  if (media_pattern) {
329  *media_pattern = av_asprintf("%s_$RepresentationID$_$Number$.chk",
330  filename_str);
331  if (!(*media_pattern)) {
332  ret = AVERROR(ENOMEM);
333  goto end;
334  }
335  }
336 
337 end:
338  av_freep(&filename_str);
339  return ret;
340 }
341 
342 /*
343  * Writes an Adaptation Set. Returns 0 on success and < 0 on failure.
344  */
345  static int write_adaptation_set(AVFormatContext *s, int as_index)
346 {
347  WebMDashMuxContext *w = s->priv_data;
348  AdaptationSet *as = &w->as[as_index];
349  AVCodecParameters *par = s->streams[as->streams[0]]->codecpar;
350  AVDictionaryEntry *lang;
351  int i;
352  static const char boolean[2][6] = { "false", "true" };
353  int subsegmentStartsWithSAP = 1;
354 
355  // Width, Height and Sample Rate will go in the AdaptationSet tag if they
356  // are the same for all contained Representations. otherwise, they will go
357  // on their respective Representation tag. For live streams, they always go
358  // in the Representation tag.
359  int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1;
360  if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
361  width_in_as = !w->is_live && check_matching_width(s, as);
362  height_in_as = !w->is_live && check_matching_height(s, as);
363  } else {
364  sample_rate_in_as = !w->is_live && check_matching_sample_rate(s, as);
365  }
366 
367  avio_printf(s->pb, "<AdaptationSet id=\"%s\"", as->id);
368  avio_printf(s->pb, " mimeType=\"%s/webm\"",
369  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
370  avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(par->codec_id));
371 
372  lang = av_dict_get(s->streams[as->streams[0]]->metadata, "language", NULL, 0);
373  if (lang) avio_printf(s->pb, " lang=\"%s\"", lang->value);
374 
375  if (par->codec_type == AVMEDIA_TYPE_VIDEO && width_in_as)
376  avio_printf(s->pb, " width=\"%d\"", par->width);
377  if (par->codec_type == AVMEDIA_TYPE_VIDEO && height_in_as)
378  avio_printf(s->pb, " height=\"%d\"", par->height);
379  if (par->codec_type == AVMEDIA_TYPE_AUDIO && sample_rate_in_as)
380  avio_printf(s->pb, " audioSamplingRate=\"%d\"", par->sample_rate);
381 
382  avio_printf(s->pb, " bitstreamSwitching=\"%s\"",
383  boolean[bitstream_switching(s, as)]);
384  avio_printf(s->pb, " subsegmentAlignment=\"%s\"",
385  boolean[w->is_live || subsegment_alignment(s, as)]);
386 
387  for (i = 0; i < as->nb_streams; i++) {
388  AVDictionaryEntry *kf = av_dict_get(s->streams[as->streams[i]]->metadata,
389  CLUSTER_KEYFRAME, NULL, 0);
390  if (!w->is_live && (!kf || !strncmp(kf->value, "0", 1))) subsegmentStartsWithSAP = 0;
391  }
392  avio_printf(s->pb, " subsegmentStartsWithSAP=\"%d\"", subsegmentStartsWithSAP);
393  avio_printf(s->pb, ">\n");
394 
395  if (w->is_live) {
396  AVDictionaryEntry *filename =
397  av_dict_get(s->streams[as->streams[0]]->metadata, FILENAME, NULL, 0);
398  char *initialization_pattern = NULL;
399  char *media_pattern = NULL;
400  int ret = parse_filename(filename->value, NULL, &initialization_pattern,
401  &media_pattern);
402  if (ret) return ret;
403  avio_printf(s->pb, "<ContentComponent id=\"1\" type=\"%s\"/>\n",
404  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
405  avio_printf(s->pb, "<SegmentTemplate");
406  avio_printf(s->pb, " timescale=\"1000\"");
407  avio_printf(s->pb, " duration=\"%d\"", w->chunk_duration);
408  avio_printf(s->pb, " media=\"%s\"", media_pattern);
409  avio_printf(s->pb, " startNumber=\"%d\"", w->chunk_start_index);
410  avio_printf(s->pb, " initialization=\"%s\"", initialization_pattern);
411  avio_printf(s->pb, "/>\n");
412  av_free(initialization_pattern);
413  av_free(media_pattern);
414  }
415 
416  for (i = 0; i < as->nb_streams; i++) {
417  char *representation_id = NULL;
418  int ret;
419  if (w->is_live) {
420  AVDictionaryEntry *filename =
421  av_dict_get(s->streams[as->streams[i]]->metadata, FILENAME, NULL, 0);
422  if (!filename)
423  return AVERROR(EINVAL);
424  if (ret = parse_filename(filename->value, &representation_id, NULL, NULL))
425  return ret;
426  } else {
427  representation_id = av_asprintf("%d", w->representation_id++);
428  if (!representation_id) return AVERROR(ENOMEM);
429  }
430  ret = write_representation(s, s->streams[as->streams[i]],
431  representation_id, !width_in_as,
432  !height_in_as, !sample_rate_in_as);
433  av_free(representation_id);
434  if (ret) return ret;
435  }
436  avio_printf(s->pb, "</AdaptationSet>\n");
437  return 0;
438 }
439 
440  static int to_integer(char *p, int len)
441 {
442  int ret;
443  char *q = av_malloc(sizeof(char) * len);
444  if (!q)
445  return AVERROR(ENOMEM);
446  av_strlcpy(q, p, len);
447  ret = atoi(q);
448  av_free(q);
449  return ret;
450 }
451 
452  static int parse_adaptation_sets(AVFormatContext *s)
453 {
454  WebMDashMuxContext *w = s->priv_data;
455  char *p = w->adaptation_sets;
456  char *q;
457  enum { new_set, parsed_id, parsing_streams } state;
458  if (!w->adaptation_sets) {
459  av_log(s, AV_LOG_ERROR, "The 'adaptation_sets' option must be set.\n");
460  return AVERROR(EINVAL);
461  }
462  // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
463  state = new_set;
464  while (p < w->adaptation_sets + strlen(w->adaptation_sets)) {
465  if (*p == ' ')
466  continue;
467  else if (state == new_set && !strncmp(p, "id=", 3)) {
468  void *mem = av_realloc(w->as, sizeof(*w->as) * (w->nb_as + 1));
469  if (mem == NULL)
470  return AVERROR(ENOMEM);
471  w->as = mem;
472  ++w->nb_as;
473  w->as[w->nb_as - 1].nb_streams = 0;
474  w->as[w->nb_as - 1].streams = NULL;
475  p += 3; // consume "id="
476  q = w->as[w->nb_as - 1].id;
477  while (*p != ',') *q++ = *p++;
478  *q = 0;
479  p++;
480  state = parsed_id;
481  } else if (state == parsed_id && !strncmp(p, "streams=", 8)) {
482  p += 8; // consume "streams="
483  state = parsing_streams;
484  } else if (state == parsing_streams) {
485  struct AdaptationSet *as = &w->as[w->nb_as - 1];
486  q = p;
487  while (*q != '0円' && *q != ',' && *q != ' ') q++;
488  as->streams = av_realloc(as->streams, sizeof(*as->streams) * ++as->nb_streams);
489  if (as->streams == NULL)
490  return AVERROR(ENOMEM);
491  as->streams[as->nb_streams - 1] = to_integer(p, q - p + 1);
492  if (as->streams[as->nb_streams - 1] < 0 ||
493  as->streams[as->nb_streams - 1] >= s->nb_streams) {
494  av_log(s, AV_LOG_ERROR, "Invalid value for 'streams' in adapation_sets.\n");
495  return AVERROR(EINVAL);
496  }
497  if (*q == '0円') break;
498  if (*q == ' ') state = new_set;
499  p = ++q;
500  } else {
501  return -1;
502  }
503  }
504  return 0;
505 }
506 
507  static int webm_dash_manifest_write_header(AVFormatContext *s)
508 {
509  int i;
510  double start = 0.0;
511  int ret;
512  WebMDashMuxContext *w = s->priv_data;
513  ret = parse_adaptation_sets(s);
514  if (ret < 0) {
515  goto fail;
516  }
517  ret = write_header(s);
518  if (ret < 0) {
519  goto fail;
520  }
521  avio_printf(s->pb, "<Period id=\"0\"");
522  avio_printf(s->pb, " start=\"PT%gS\"", start);
523  if (!w->is_live) {
524  avio_printf(s->pb, " duration=\"PT%gS\"", get_duration(s));
525  }
526  avio_printf(s->pb, " >\n");
527 
528  for (i = 0; i < w->nb_as; i++) {
529  ret = write_adaptation_set(s, i);
530  if (ret < 0) {
531  goto fail;
532  }
533  }
534 
535  avio_printf(s->pb, "</Period>\n");
536  write_footer(s);
537 fail:
538  free_adaptation_sets(s);
539  return ret < 0 ? ret : 0;
540 }
541 
542  static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt)
543 {
544  return AVERROR_EOF;
545 }
546 
547  static int webm_dash_manifest_write_trailer(AVFormatContext *s)
548 {
549  free_adaptation_sets(s);
550  return 0;
551 }
552 
553  #define OFFSET(x) offsetof(WebMDashMuxContext, x)
554  static const AVOption options[] = {
555  { "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
556  { "debug_mode", "[private option - users should never set this]. Create deterministic output", OFFSET(debug_mode), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
557  { "live", "create a live stream manifest", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
558  { "chunk_start_index", "start index of the chunk", OFFSET(chunk_start_index), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
559  { "chunk_duration_ms", "duration of each chunk (in milliseconds)", OFFSET(chunk_duration), AV_OPT_TYPE_INT, {.i64 = 1000}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
560  { "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
561  { "time_shift_buffer_depth", "Smallest time (in seconds) shifting buffer for which any Representation is guaranteed to be available.", OFFSET(time_shift_buffer_depth), AV_OPT_TYPE_DOUBLE, { .dbl = 60.0 }, 1.0, DBL_MAX, AV_OPT_FLAG_ENCODING_PARAM },
562  { "minimum_update_period", "Minimum Update Period (in seconds) of the manifest.", OFFSET(minimum_update_period), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
563  { NULL },
564 };
565 
566 #if CONFIG_WEBM_DASH_MANIFEST_MUXER
567 static const AVClass webm_dash_class = {
568  .class_name = "WebM DASH Manifest muxer",
569  .item_name = av_default_item_name,
570  .option = options,
571  .version = LIBAVUTIL_VERSION_INT,
572 };
573 
574 AVOutputFormat ff_webm_dash_manifest_muxer = {
575  .name = "webm_dash_manifest",
576  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
577  .mime_type = "application/xml",
578  .extensions = "xml",
579  .priv_data_size = sizeof(WebMDashMuxContext),
580  .write_header = webm_dash_manifest_write_header,
581  .write_packet = webm_dash_manifest_write_packet,
582  .write_trailer = webm_dash_manifest_write_trailer,
583  .priv_class = &webm_dash_class,
584 };
585 #endif
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:679
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_VP9
Definition: avcodec.h:386
s
const char * s
Definition: avisynth_c.h:768
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
time_internal.h
AVOption
AVOption.
Definition: opt.h:246
av_realloc
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
INITIALIZATION_RANGE
#define INITIALIZATION_RANGE
Definition: matroska.h:370
av_stristr
char * av_stristr(const char *s1, const char *s2)
Locate the first case-independent occurrence in the string haystack of the string needle...
Definition: avstring.c:56
AV_OPT_TYPE_INT
Definition: opt.h:223
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
subsegment_alignment
static int subsegment_alignment(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:138
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
WebMDashMuxContext::utc_timing_url
char * utc_timing_url
Definition: webmdashenc.c:57
AVFormatContext
Format I/O context.
Definition: avformat.h:1342
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
dict.h
Public dictionary API.
mem
int mem
Definition: avisynth_c.h:821
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:3950
opt.h
AVOptions.
AdaptationSet::streams
int * streams
Definition: webmdashenc.c:44
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
TRACK_NUMBER
#define TRACK_NUMBER
Definition: matroska.h:378
WebMDashMuxContext::as
AdaptationSet * as
Definition: webmdashenc.c:51
ff_webm_dash_manifest_muxer
AVOutputFormat ff_webm_dash_manifest_muxer
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
duration
int64_t duration
Definition: movenc.c:63
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
AV_OPT_TYPE_STRING
Definition: opt.h:227
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_OPT_FLAG_ENCODING_PARAM
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
FILENAME
#define FILENAME
Definition: matroska.h:373
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVERROR
#define AVERROR(e)
Definition: error.h:43
options
static const AVOption options[]
Definition: webmdashenc.c:554
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:186
webm_dash_manifest_write_packet
static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: webmdashenc.c:542
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
av_strlcpy
size_t av_strlcpy(char *dst, const char *src, size_t size)
Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst.
Definition: avstring.c:83
fail
#define fail()
Definition: checkasm.h:116
check_matching_sample_rate
static int check_matching_sample_rate(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:255
gmtime_r
static struct tm * gmtime_r(const time_t *clock, struct tm *result)
Definition: time_internal.h:26
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3902
webm_dash_manifest_write_header
static int webm_dash_manifest_write_header(AVFormatContext *s)
Definition: webmdashenc.c:507
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1398
write_header
static int write_header(AVFormatContext *s)
Definition: webmdashenc.c:91
webm_dash_manifest_write_trailer
static int webm_dash_manifest_write_trailer(AVFormatContext *s)
Definition: webmdashenc.c:547
WebMDashMuxContext::time_shift_buffer_depth
double time_shift_buffer_depth
Definition: webmdashenc.c:58
OFFSET
#define OFFSET(x)
Definition: webmdashenc.c:553
write_footer
static void write_footer(AVFormatContext *s)
Definition: webmdashenc.c:133
w
uint8_t w
Definition: llviddspenc.c:38
WebMDashMuxContext::adaptation_sets
char * adaptation_sets
Definition: webmdashenc.c:50
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
CLUSTER_KEYFRAME
#define CLUSTER_KEYFRAME
Definition: matroska.h:376
AVOutputFormat::name
const char * name
Definition: avformat.h:507
AV_OPT_TYPE_BOOL
Definition: opt.h:240
get_duration
static double get_duration(AVFormatContext *s)
Definition: webmdashenc.c:78
DURATION
#define DURATION
Definition: matroska.h:375
get_codec_name
static const char * get_codec_name(int codec_id)
Definition: webmdashenc.c:63
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:937
AV_CODEC_ID_OPUS
Definition: avcodec.h:611
codec_id
enum AVCodecID codec_id
Definition: vaapi_decode.c:362
state
static struct @271 state
to_integer
static int to_integer(char *p, int len)
Definition: webmdashenc.c:440
AV_CODEC_ID_VP8
Definition: avcodec.h:358
AVStream
Stream structure.
Definition: avformat.h:873
CUES_END
#define CUES_END
Definition: matroska.h:372
AV_OPT_TYPE_DOUBLE
Definition: opt.h:225
av_strdup
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:251
BANDWIDTH
#define BANDWIDTH
Definition: matroska.h:374
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1384
AdaptationSet::nb_streams
int nb_streams
Definition: webmdashenc.c:45
CUE_TIMESTAMPS
#define CUE_TIMESTAMPS
Definition: matroska.h:377
webm_dash_class
static const AVClass webm_dash_class
Definition: matroskadec.c:4019
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
parse_filename
static int parse_filename(char *filename, char **representation_id, char **initialization_pattern, char **media_pattern)
Definition: webmdashenc.c:285
check_matching_height
static int check_matching_height(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:242
free_adaptation_sets
static void free_adaptation_sets(AVFormatContext *s)
Definition: webmdashenc.c:265
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:3994
avformat.h
Main libavformat public API header.
AVERROR_UNKNOWN
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
AdaptationSet::id
char id[10]
Definition: dashenc.c:60
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
AVDictionaryEntry::value
char * value
Definition: dict.h:87
len
int len
Definition: vorbis_enc_data.h:452
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1370
write_adaptation_set
static int write_adaptation_set(AVFormatContext *s, int as_index)
Definition: webmdashenc.c:345
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3898
bitstream_switching
static int bitstream_switching(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:151
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
start
void INT64 start
Definition: avisynth_c.h:690
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
parse_adaptation_sets
static int parse_adaptation_sets(AVFormatContext *s)
Definition: webmdashenc.c:452
check_matching_width
static int check_matching_width(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:229
CUES_START
#define CUES_START
Definition: matroska.h:371
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
AV_CODEC_ID_VORBIS
Definition: avcodec.h:556
write_representation
static int write_representation(AVFormatContext *s, AVStream *stream, char *id, int output_width, int output_height, int output_sample_rate)
Definition: webmdashenc.c:176
avio_printf
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
WebMDashMuxContext::minimum_update_period
int minimum_update_period
Definition: webmdashenc.c:59
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