FFmpeg  4.4.4
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 "matroska.h"
35 
36 #include "libavutil/avstring.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/opt.h"
40 
41 typedef struct AdaptationSet {
42  char id[10];
43  int *streams;
44  int nb_streams;
46 
47 typedef struct WebMDashMuxContext {
48  const AVClass *class;
51  int nb_as;
53  int is_live;
60 
61 static const char *get_codec_name(int codec_id)
62 {
64 }
65 
67 {
68  int i = 0;
69  double max = 0.0;
70  for (i = 0; i < s->nb_streams; i++) {
71  AVDictionaryEntry *duration = av_dict_get(s->streams[i]->metadata,
72  DURATION, NULL, 0);
73  if (!duration || atof(duration->value) < 0) continue;
74  if (atof(duration->value) > max) max = atof(duration->value);
75  }
76  return max / 1000;
77 }
78 
80 {
81  WebMDashMuxContext *w = s->priv_data;
82  AVIOContext *pb = s->pb;
83  double min_buffer_time = 1.0;
84  avio_printf(pb, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
85  avio_printf(pb, "<MPD\n");
86  avio_printf(pb, " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n");
87  avio_printf(pb, " xmlns=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
88  avio_printf(pb, " xsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
89  avio_printf(pb, " type=\"%s\"\n", w->is_live ? "dynamic" : "static");
90  if (!w->is_live) {
91  avio_printf(pb, " mediaPresentationDuration=\"PT%gS\"\n",
92  get_duration(s));
93  }
94  avio_printf(pb, " minBufferTime=\"PT%gS\"\n", min_buffer_time);
95  avio_printf(pb, " profiles=\"%s\"%s",
96  w->is_live ? "urn:mpeg:dash:profile:isoff-live:2011" : "urn:mpeg:dash:profile:webm-on-demand:2012",
97  w->is_live ? "\n" : ">\n");
98  if (w->is_live) {
99  time_t local_time = time(NULL);
100  struct tm gmt_buffer;
101  struct tm *gmt = gmtime_r(&local_time, &gmt_buffer);
102  char gmt_iso[21];
103  if (!strftime(gmt_iso, 21, "%Y-%m-%dT%H:%M:%SZ", gmt)) {
104  return AVERROR_UNKNOWN;
105  }
106  if (s->flags & AVFMT_FLAG_BITEXACT) {
107  av_strlcpy(gmt_iso, "", 1);
108  }
109  avio_printf(pb, " availabilityStartTime=\"%s\"\n", gmt_iso);
110  avio_printf(pb, " timeShiftBufferDepth=\"PT%gS\"\n", w->time_shift_buffer_depth);
111  avio_printf(pb, " minimumUpdatePeriod=\"PT%dS\"", w->minimum_update_period);
112  avio_printf(pb, ">\n");
113  if (w->utc_timing_url) {
114  avio_printf(pb, "<UTCTiming\n");
115  avio_printf(pb, " schemeIdUri=\"urn:mpeg:dash:utc:http-iso:2014\"\n");
116  avio_printf(pb, " value=\"%s\"/>\n", w->utc_timing_url);
117  }
118  }
119  return 0;
120 }
121 
123 {
124  avio_printf(s->pb, "</MPD>\n");
125 }
126 
128 {
129  int i;
130  AVDictionaryEntry *gold = av_dict_get(s->streams[as->streams[0]]->metadata,
131  CUE_TIMESTAMPS, NULL, 0);
132  if (!gold) return 0;
133  for (i = 1; i < as->nb_streams; i++) {
134  AVDictionaryEntry *ts = av_dict_get(s->streams[as->streams[i]]->metadata,
135  CUE_TIMESTAMPS, NULL, 0);
136  if (!ts || !av_strstart(ts->value, gold->value, NULL)) return 0;
137  }
138  return 1;
139 }
140 
142 {
143  int i;
144  const AVStream *gold_st = s->streams[as->streams[0]];
145  AVDictionaryEntry *gold_track_num = av_dict_get(gold_st->metadata,
146  TRACK_NUMBER, NULL, 0);
147  AVCodecParameters *gold_par = gold_st->codecpar;
148  if (!gold_track_num) return 0;
149  for (i = 1; i < as->nb_streams; i++) {
150  const AVStream *st = s->streams[as->streams[i]];
151  AVDictionaryEntry *track_num = av_dict_get(st->metadata,
152  TRACK_NUMBER, NULL, 0);
153  AVCodecParameters *par = st->codecpar;
154  if (!track_num ||
155  !av_strstart(track_num->value, gold_track_num->value, NULL) ||
156  gold_par->codec_id != par->codec_id ||
157  gold_par->extradata_size != par->extradata_size ||
158  (par->extradata_size > 0 &&
159  memcmp(gold_par->extradata, par->extradata, par->extradata_size))) {
160  return 0;
161  }
162  }
163  return 1;
164 }
165 
166 /*
167  * Writes a Representation within an Adaptation Set. Returns 0 on success and
168  * < 0 on failure.
169  */
170 static int write_representation(AVFormatContext *s, AVStream *st, char *id,
171  int output_width, int output_height,
172  int output_sample_rate)
173 {
174  WebMDashMuxContext *w = s->priv_data;
175  AVIOContext *pb = s->pb;
176  const AVCodecParameters *par = st->codecpar;
177  AVDictionaryEntry *bandwidth = av_dict_get(st->metadata, BANDWIDTH, NULL, 0);
178  const char *bandwidth_str;
179  avio_printf(pb, "<Representation id=\"%s\"", id);
180  if (bandwidth) {
181  bandwidth_str = bandwidth->value;
182  } else if (w->is_live) {
183  // if bandwidth for live was not provided, use a default
184  bandwidth_str = (par->codec_type == AVMEDIA_TYPE_AUDIO) ? "128000" : "1000000";
185  } else {
186  return AVERROR(EINVAL);
187  }
188  avio_printf(pb, " bandwidth=\"%s\"", bandwidth_str);
189  if (par->codec_type == AVMEDIA_TYPE_VIDEO && output_width)
190  avio_printf(pb, " width=\"%d\"", par->width);
191  if (par->codec_type == AVMEDIA_TYPE_VIDEO && output_height)
192  avio_printf(pb, " height=\"%d\"", par->height);
193  if (par->codec_type == AVMEDIA_TYPE_AUDIO && output_sample_rate)
194  avio_printf(pb, " audioSamplingRate=\"%d\"", par->sample_rate);
195  if (w->is_live) {
196  // For live streams, Codec and Mime Type always go in the Representation tag.
197  avio_printf(pb, " codecs=\"%s\"", get_codec_name(par->codec_id));
198  avio_printf(pb, " mimeType=\"%s/webm\"",
199  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
200  // For live streams, subsegments always start with key frames. So this
201  // is always 1.
202  avio_printf(pb, " startsWithSAP=\"1\"");
203  avio_printf(pb, ">");
204  } else {
206  AVDictionaryEntry *cues_start = av_dict_get(st->metadata, CUES_START, NULL, 0);
207  AVDictionaryEntry *cues_end = av_dict_get(st->metadata, CUES_END, NULL, 0);
208  AVDictionaryEntry *filename = av_dict_get(st->metadata, FILENAME, NULL, 0);
209  if (!irange || !cues_start || !cues_end || !filename)
210  return AVERROR(EINVAL);
211 
212  avio_printf(pb, ">\n");
213  avio_printf(pb, "<BaseURL>%s</BaseURL>\n", filename->value);
214  avio_printf(pb, "<SegmentBase\n");
215  avio_printf(pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value);
216  avio_printf(pb, "<Initialization\n");
217  avio_printf(pb, " range=\"0-%s\" />\n", irange->value);
218  avio_printf(pb, "</SegmentBase>\n");
219  }
220  avio_printf(pb, "</Representation>\n");
221  return 0;
222 }
223 
224 /*
225  * Checks if width of all streams are the same. Returns 1 if true, 0 otherwise.
226  */
228 {
229  int first_width, i;
230  if (as->nb_streams < 2) return 1;
231  first_width = s->streams[as->streams[0]]->codecpar->width;
232  for (i = 1; i < as->nb_streams; i++)
233  if (first_width != s->streams[as->streams[i]]->codecpar->width)
234  return 0;
235  return 1;
236 }
237 
238 /*
239  * Checks if height of all streams are the same. Returns 1 if true, 0 otherwise.
240  */
242 {
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  */
256 {
257  int first_sample_rate, i;
258  if (as->nb_streams < 2) return 1;
259  first_sample_rate = s->streams[as->streams[0]]->codecpar->sample_rate;
260  for (i = 1; i < as->nb_streams; i++)
261  if (first_sample_rate != s->streams[as->streams[i]]->codecpar->sample_rate)
262  return 0;
263  return 1;
264 }
265 
267 {
268  WebMDashMuxContext *w = s->priv_data;
269  int i;
270  for (i = 0; i < w->nb_as; i++) {
271  av_freep(&w->as[i].streams);
272  }
273  av_freep(&w->as);
274  w->nb_as = 0;
275 }
276 
277 /*
278  * Parses a live header filename and returns the position of the '_' and '.'
279  * delimiting <file_description> and <representation_id>.
280  *
281  * Name of the header file should conform to the following pattern:
282  * <file_description>_<representation_id>.hdr where <file_description> can be
283  * anything. The chunks should be named according to the following pattern:
284  * <file_description>_<representation_id>_<chunk_number>.chk
285  */
286 static int split_filename(char *filename, char **underscore_pos,
287  char **period_pos)
288 {
289  *underscore_pos = strrchr(filename, '_');
290  if (!*underscore_pos)
291  return AVERROR(EINVAL);
292  *period_pos = strchr(*underscore_pos, '.');
293  if (!*period_pos)
294  return AVERROR(EINVAL);
295  return 0;
296 }
297 
298 /*
299  * Writes an Adaptation Set. Returns 0 on success and < 0 on failure.
300  */
301 static int write_adaptation_set(AVFormatContext *s, int as_index)
302 {
303  WebMDashMuxContext *w = s->priv_data;
304  AdaptationSet *as = &w->as[as_index];
305  const AVStream *st = s->streams[as->streams[0]];
306  AVCodecParameters *par = st->codecpar;
307  AVDictionaryEntry *lang;
308  AVIOContext *pb = s->pb;
309  int i;
310  static const char boolean[2][6] = { "false", "true" };
311  int subsegmentStartsWithSAP = 1;
312 
313  // Width, Height and Sample Rate will go in the AdaptationSet tag if they
314  // are the same for all contained Representations. otherwise, they will go
315  // on their respective Representation tag. For live streams, they always go
316  // in the Representation tag.
317  int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1;
318  if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
319  width_in_as = !w->is_live && check_matching_width (s, as);
320  height_in_as = !w->is_live && check_matching_height(s, as);
321  } else {
322  sample_rate_in_as = !w->is_live && check_matching_sample_rate(s, as);
323  }
324 
325  avio_printf(pb, "<AdaptationSet id=\"%s\"", as->id);
326  avio_printf(pb, " mimeType=\"%s/webm\"",
327  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
328  avio_printf(pb, " codecs=\"%s\"", get_codec_name(par->codec_id));
329 
330  lang = av_dict_get(st->metadata, "language", NULL, 0);
331  if (lang)
332  avio_printf(pb, " lang=\"%s\"", lang->value);
333 
334  if (par->codec_type == AVMEDIA_TYPE_VIDEO && width_in_as)
335  avio_printf(pb, " width=\"%d\"", par->width);
336  if (par->codec_type == AVMEDIA_TYPE_VIDEO && height_in_as)
337  avio_printf(pb, " height=\"%d\"", par->height);
338  if (par->codec_type == AVMEDIA_TYPE_AUDIO && sample_rate_in_as)
339  avio_printf(pb, " audioSamplingRate=\"%d\"", par->sample_rate);
340 
341  avio_printf(pb, " bitstreamSwitching=\"%s\"",
342  boolean[bitstream_switching(s, as)]);
343  avio_printf(pb, " subsegmentAlignment=\"%s\"",
344  boolean[w->is_live || subsegment_alignment(s, as)]);
345 
346  for (i = 0; i < as->nb_streams; i++) {
347  AVDictionaryEntry *kf = av_dict_get(s->streams[as->streams[i]]->metadata,
348  CLUSTER_KEYFRAME, NULL, 0);
349  if (!w->is_live && (!kf || !strncmp(kf->value, "0", 1))) subsegmentStartsWithSAP = 0;
350  }
351  avio_printf(pb, " subsegmentStartsWithSAP=\"%d\"", subsegmentStartsWithSAP);
352  avio_printf(pb, ">\n");
353 
354  if (w->is_live) {
355  AVDictionaryEntry *filename =
356  av_dict_get(st->metadata, FILENAME, NULL, 0);
357  char *underscore_pos, *period_pos;
358  int ret;
359  if (!filename)
360  return AVERROR(EINVAL);
361  ret = split_filename(filename->value, &underscore_pos, &period_pos);
362  if (ret) return ret;
363  *underscore_pos = '\0';
364  avio_printf(pb, "<ContentComponent id=\"1\" type=\"%s\"/>\n",
365  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
366  avio_printf(pb, "<SegmentTemplate");
367  avio_printf(pb, " timescale=\"1000\"");
368  avio_printf(pb, " duration=\"%d\"", w->chunk_duration);
369  avio_printf(pb, " media=\"%s_$RepresentationID$_$Number$.chk\"",
370  filename->value);
371  avio_printf(pb, " startNumber=\"%d\"", w->chunk_start_index);
372  avio_printf(pb, " initialization=\"%s_$RepresentationID$.hdr\"",
373  filename->value);
374  avio_printf(pb, "/>\n");
375  *underscore_pos = '_';
376  }
377 
378  for (i = 0; i < as->nb_streams; i++) {
379  char buf[25], *representation_id = buf, *underscore_pos, *period_pos;
380  AVStream *st = s->streams[as->streams[i]];
381  int ret;
382  if (w->is_live) {
383  AVDictionaryEntry *filename =
384  av_dict_get(st->metadata, FILENAME, NULL, 0);
385  if (!filename)
386  return AVERROR(EINVAL);
387  ret = split_filename(filename->value, &underscore_pos, &period_pos);
388  if (ret < 0)
389  return ret;
390  representation_id = underscore_pos + 1;
391  *period_pos = '\0';
392  } else {
393  snprintf(buf, sizeof(buf), "%d", w->representation_id++);
394  }
395  ret = write_representation(s, st, representation_id, !width_in_as,
396  !height_in_as, !sample_rate_in_as);
397  if (ret) return ret;
398  if (w->is_live)
399  *period_pos = '.';
400  }
401  avio_printf(s->pb, "</AdaptationSet>\n");
402  return 0;
403 }
404 
406 {
407  WebMDashMuxContext *w = s->priv_data;
408  char *p = w->adaptation_sets;
409  char *q;
410  enum { new_set, parsed_id, parsing_streams } state;
411  if (!w->adaptation_sets) {
412  av_log(s, AV_LOG_ERROR, "The 'adaptation_sets' option must be set.\n");
413  return AVERROR(EINVAL);
414  }
415  // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
416  state = new_set;
417  while (1) {
418  if (*p == '\0') {
419  if (state == new_set)
420  break;
421  else
422  return AVERROR(EINVAL);
423  } else if (state == new_set && *p == ' ') {
424  p++;
425  continue;
426  } else if (state == new_set && !strncmp(p, "id=", 3)) {
427  void *mem = av_realloc(w->as, sizeof(*w->as) * (w->nb_as + 1));
428  const char *comma;
429  if (mem == NULL)
430  return AVERROR(ENOMEM);
431  w->as = mem;
432  ++w->nb_as;
433  w->as[w->nb_as - 1].nb_streams = 0;
434  w->as[w->nb_as - 1].streams = NULL;
435  p += 3; // consume "id="
436  q = w->as[w->nb_as - 1].id;
437  comma = strchr(p, ',');
438  if (!comma || comma - p >= sizeof(w->as[w->nb_as - 1].id)) {
439  av_log(s, AV_LOG_ERROR, "'id' in 'adaptation_sets' is malformed.\n");
440  return AVERROR(EINVAL);
441  }
442  while (*p != ',') *q++ = *p++;
443  *q = 0;
444  p++;
445  state = parsed_id;
446  } else if (state == parsed_id && !strncmp(p, "streams=", 8)) {
447  p += 8; // consume "streams="
448  state = parsing_streams;
449  } else if (state == parsing_streams) {
450  struct AdaptationSet *as = &w->as[w->nb_as - 1];
451  int64_t num;
452  int ret = av_reallocp_array(&as->streams, ++as->nb_streams,
453  sizeof(*as->streams));
454  if (ret < 0)
455  return ret;
456  num = strtoll(p, &q, 10);
457  if (!av_isdigit(*p) || (*q != ' ' && *q != '\0' && *q != ',') ||
458  num < 0 || num >= s->nb_streams) {
459  av_log(s, AV_LOG_ERROR, "Invalid value for 'streams' in adapation_sets.\n");
460  return AVERROR(EINVAL);
461  }
462  as->streams[as->nb_streams - 1] = num;
463  if (*q == '\0') break;
464  if (*q == ' ') state = new_set;
465  p = ++q;
466  } else {
467  return -1;
468  }
469  }
470  return 0;
471 }
472 
474 {
475  int i;
476  double start = 0.0;
477  int ret;
478  WebMDashMuxContext *w = s->priv_data;
479 
480  for (unsigned i = 0; i < s->nb_streams; i++) {
481  enum AVCodecID codec_id = s->streams[i]->codecpar->codec_id;
484  return AVERROR(EINVAL);
485  }
486 
487  ret = parse_adaptation_sets(s);
488  if (ret < 0) {
489  goto fail;
490  }
491  ret = write_header(s);
492  if (ret < 0) {
493  goto fail;
494  }
495  avio_printf(s->pb, "<Period id=\"0\"");
496  avio_printf(s->pb, " start=\"PT%gS\"", start);
497  if (!w->is_live) {
498  avio_printf(s->pb, " duration=\"PT%gS\"", get_duration(s));
499  }
500  avio_printf(s->pb, " >\n");
501 
502  for (i = 0; i < w->nb_as; i++) {
503  ret = write_adaptation_set(s, i);
504  if (ret < 0) {
505  goto fail;
506  }
507  }
508 
509  avio_printf(s->pb, "</Period>\n");
510  write_footer(s);
511 fail:
513  return ret < 0 ? ret : 0;
514 }
515 
517 {
518  return AVERROR_EOF;
519 }
520 
521 #define OFFSET(x) offsetof(WebMDashMuxContext, x)
522 static const AVOption options[] = {
523  { "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 },
524  { "live", "create a live stream manifest", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
525  { "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 },
526  { "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 },
527  { "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 },
528  { "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 },
529  { "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 },
530  { NULL },
531 };
532 
533 static const AVClass webm_dash_class = {
534  .class_name = "WebM DASH Manifest muxer",
535  .item_name = av_default_item_name,
536  .option = options,
537  .version = LIBAVUTIL_VERSION_INT,
538 };
539 
541  .name = "webm_dash_manifest",
542  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
543  .mime_type = "application/xml",
544  .extensions = "xml",
545  .priv_data_size = sizeof(WebMDashMuxContext),
548  .priv_class = &webm_dash_class,
549 };
Main libavformat public API header.
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1380
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.
#define s(width, name)
Definition: cbs_vp9.c:257
static struct @321 state
#define fail()
Definition: checkasm.h:133
#define NULL
Definition: coverity.c:32
#define max(a, b)
Definition: cuda_runtime.h:33
Public dictionary API.
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:729
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
@ AV_OPT_TYPE_BOOL
Definition: opt.h:242
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3501
@ AV_CODEC_ID_VORBIS
Definition: codec_id.h:429
@ AV_CODEC_ID_VP8
Definition: codec_id.h:189
@ AV_CODEC_ID_VP9
Definition: codec_id.h:217
@ AV_CODEC_ID_OPUS
Definition: codec_id.h:484
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
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:134
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
Definition: mem.c:206
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:211
int av_strstart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str.
Definition: avstring.c:34
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
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int i
Definition: input.c:407
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
uint8_t w
Definition: llviddspenc.c:39
#define CUES_START
Definition: matroska.h:376
#define CUES_END
Definition: matroska.h:377
#define FILENAME
Definition: matroska.h:378
#define CLUSTER_KEYFRAME
Definition: matroska.h:381
#define DURATION
Definition: matroska.h:380
#define BANDWIDTH
Definition: matroska.h:379
#define INITIALIZATION_RANGE
Definition: matroska.h:375
#define TRACK_NUMBER
Definition: matroska.h:383
#define CUE_TIMESTAMPS
Definition: matroska.h:382
AVOptions.
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:278
#define snprintf
Definition: snprintf.h:34
Describe the class of an AVClass context structure.
Definition: log.h:67
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
const char * name
Name of the codec described by this descriptor.
Definition: codec_desc.h:46
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
int width
Video only.
Definition: codec_par.h:126
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
char * value
Definition: dict.h:83
Format I/O context.
Definition: avformat.h:1232
Bytestream IO Context.
Definition: avio.h:161
AVOption.
Definition: opt.h:248
const char * name
Definition: avformat.h:491
This structure stores compressed data.
Definition: packet.h:346
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
AVDictionary * metadata
Definition: avformat.h:937
int nb_streams
Definition: dashenc.c:94
char * adaptation_sets
Definition: webmdashenc.c:49
double time_shift_buffer_depth
Definition: webmdashenc.c:57
AdaptationSet * as
Definition: webmdashenc.c:50
#define av_freep(p)
#define av_log(a,...)
int64_t duration
Definition: movenc.c:64
AVPacket * pkt
Definition: movenc.c:59
#define gmtime_r
Definition: time_internal.h:34
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
static const AVClass webm_dash_class
Definition: webmdashenc.c:533
static int check_matching_width(AVFormatContext *s, const AdaptationSet *as)
Definition: webmdashenc.c:227
static const AVOption options[]
Definition: webmdashenc.c:522
static int check_matching_sample_rate(AVFormatContext *s, const AdaptationSet *as)
Definition: webmdashenc.c:255
static int write_representation(AVFormatContext *s, AVStream *st, char *id, int output_width, int output_height, int output_sample_rate)
Definition: webmdashenc.c:170
static int check_matching_height(AVFormatContext *s, const AdaptationSet *as)
Definition: webmdashenc.c:241
static void free_adaptation_sets(AVFormatContext *s)
Definition: webmdashenc.c:266
static int split_filename(char *filename, char **underscore_pos, char **period_pos)
Definition: webmdashenc.c:286
static void write_footer(AVFormatContext *s)
Definition: webmdashenc.c:122
static double get_duration(AVFormatContext *s)
Definition: webmdashenc.c:66
static int bitstream_switching(AVFormatContext *s, const AdaptationSet *as)
Definition: webmdashenc.c:141
static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: webmdashenc.c:516
static int write_header(AVFormatContext *s)
Definition: webmdashenc.c:79
static int subsegment_alignment(AVFormatContext *s, const AdaptationSet *as)
Definition: webmdashenc.c:127
AVOutputFormat ff_webm_dash_manifest_muxer
Definition: webmdashenc.c:540
static int parse_adaptation_sets(AVFormatContext *s)
Definition: webmdashenc.c:405
#define OFFSET(x)
Definition: webmdashenc.c:521
static int webm_dash_manifest_write_header(AVFormatContext *s)
Definition: webmdashenc.c:473
static const char * get_codec_name(int codec_id)
Definition: webmdashenc.c:61
static int write_adaptation_set(AVFormatContext *s, int as_index)
Definition: webmdashenc.c:301