FFmpeg  4.3
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 {
63  return avcodec_descriptor_get(codec_id)->name;
64 }
65 
67 {
68  int i = 0;
69  double max = 0.0;
70  for (i = 0; i < s->nb_streams; i++) {
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 {
82  double min_buffer_time = 1.0;
83  avio_printf(s->pb, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
84  avio_printf(s->pb, "<MPD\n");
85  avio_printf(s->pb, " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"\n");
86  avio_printf(s->pb, " xmlns=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
87  avio_printf(s->pb, " xsi:schemaLocation=\"urn:mpeg:DASH:schema:MPD:2011\"\n");
88  avio_printf(s->pb, " type=\"%s\"\n", w->is_live ? "dynamic" : "static");
89  if (!w->is_live) {
90  avio_printf(s->pb, " mediaPresentationDuration=\"PT%gS\"\n",
91  get_duration(s));
92  }
93  avio_printf(s->pb, " minBufferTime=\"PT%gS\"\n", min_buffer_time);
94  avio_printf(s->pb, " profiles=\"%s\"%s",
95  w->is_live ? "urn:mpeg:dash:profile:isoff-live:2011" : "urn:webm:dash:profile:webm-on-demand:2012",
96  w->is_live ? "\n" : ">\n");
97  if (w->is_live) {
98  time_t local_time = time(NULL);
99  struct tm gmt_buffer;
100  struct tm *gmt = gmtime_r(&local_time, &gmt_buffer);
101  char gmt_iso[21];
102  if (!strftime(gmt_iso, 21, "%Y-%m-%dT%H:%M:%SZ", gmt)) {
103  return AVERROR_UNKNOWN;
104  }
105  if (s->flags & AVFMT_FLAG_BITEXACT) {
106  av_strlcpy(gmt_iso, "", 1);
107  }
108  avio_printf(s->pb, " availabilityStartTime=\"%s\"\n", gmt_iso);
109  avio_printf(s->pb, " timeShiftBufferDepth=\"PT%gS\"\n", w->time_shift_buffer_depth);
110  avio_printf(s->pb, " minimumUpdatePeriod=\"PT%dS\"", w->minimum_update_period);
111  avio_printf(s->pb, ">\n");
112  if (w->utc_timing_url) {
113  avio_printf(s->pb, "<UTCTiming\n");
114  avio_printf(s->pb, " schemeIdUri=\"urn:mpeg:dash:utc:http-iso:2014\"\n");
115  avio_printf(s->pb, " value=\"%s\"/>\n", w->utc_timing_url);
116  }
117  }
118  return 0;
119 }
120 
122 {
123  avio_printf(s->pb, "</MPD>\n");
124 }
125 
127  int i;
129  CUE_TIMESTAMPS, NULL, 0);
130  if (!gold) return 0;
131  for (i = 1; i < as->nb_streams; i++) {
133  CUE_TIMESTAMPS, NULL, 0);
134  if (!ts || strncmp(gold->value, ts->value, strlen(gold->value))) return 0;
135  }
136  return 1;
137 }
138 
140  int i;
141  AVDictionaryEntry *gold_track_num = av_dict_get(s->streams[as->streams[0]]->metadata,
142  TRACK_NUMBER, NULL, 0);
143  AVCodecParameters *gold_par = s->streams[as->streams[0]]->codecpar;
144  if (!gold_track_num) return 0;
145  for (i = 1; i < as->nb_streams; i++) {
146  AVDictionaryEntry *track_num = av_dict_get(s->streams[as->streams[i]]->metadata,
147  TRACK_NUMBER, NULL, 0);
149  if (!track_num ||
150  strncmp(gold_track_num->value, track_num->value, strlen(gold_track_num->value)) ||
151  gold_par->codec_id != par->codec_id ||
152  gold_par->extradata_size != par->extradata_size ||
153  memcmp(gold_par->extradata, par->extradata, par->extradata_size)) {
154  return 0;
155  }
156  }
157  return 1;
158 }
159 
160 /*
161  * Writes a Representation within an Adaptation Set. Returns 0 on success and
162  * < 0 on failure.
163  */
164 static int write_representation(AVFormatContext *s, AVStream *stream, char *id,
165  int output_width, int output_height,
166  int output_sample_rate) {
169  AVDictionaryEntry *cues_start = av_dict_get(stream->metadata, CUES_START, NULL, 0);
170  AVDictionaryEntry *cues_end = av_dict_get(stream->metadata, CUES_END, NULL, 0);
171  AVDictionaryEntry *filename = av_dict_get(stream->metadata, FILENAME, NULL, 0);
172  AVDictionaryEntry *bandwidth = av_dict_get(stream->metadata, BANDWIDTH, NULL, 0);
173  const char *bandwidth_str;
174  if ((w->is_live && (!filename)) ||
175  (!w->is_live && (!irange || !cues_start || !cues_end || !filename || !bandwidth))) {
176  return AVERROR_INVALIDDATA;
177  }
178  avio_printf(s->pb, "<Representation id=\"%s\"", id);
179  // if bandwidth for live was not provided, use a default
180  if (w->is_live && !bandwidth) {
181  bandwidth_str = (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) ? "128000" : "1000000";
182  } else {
183  bandwidth_str = bandwidth->value;
184  }
185  avio_printf(s->pb, " bandwidth=\"%s\"", bandwidth_str);
186  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && output_width)
187  avio_printf(s->pb, " width=\"%d\"", stream->codecpar->width);
188  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && output_height)
189  avio_printf(s->pb, " height=\"%d\"", stream->codecpar->height);
190  if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && output_sample_rate)
191  avio_printf(s->pb, " audioSamplingRate=\"%d\"", stream->codecpar->sample_rate);
192  if (w->is_live) {
193  // For live streams, Codec and Mime Type always go in the Representation tag.
194  avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(stream->codecpar->codec_id));
195  avio_printf(s->pb, " mimeType=\"%s/webm\"",
196  stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
197  // For live streams, subsegments always start with key frames. So this
198  // is always 1.
199  avio_printf(s->pb, " startsWithSAP=\"1\"");
200  avio_printf(s->pb, ">");
201  } else {
202  avio_printf(s->pb, ">\n");
203  avio_printf(s->pb, "<BaseURL>%s</BaseURL>\n", filename->value);
204  avio_printf(s->pb, "<SegmentBase\n");
205  avio_printf(s->pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value);
206  avio_printf(s->pb, "<Initialization\n");
207  avio_printf(s->pb, " range=\"0-%s\" />\n", irange->value);
208  avio_printf(s->pb, "</SegmentBase>\n");
209  }
210  avio_printf(s->pb, "</Representation>\n");
211  return 0;
212 }
213 
214 /*
215  * Checks if width of all streams are the same. Returns 1 if true, 0 otherwise.
216  */
218  int first_width, i;
219  if (as->nb_streams < 2) return 1;
220  first_width = s->streams[as->streams[0]]->codecpar->width;
221  for (i = 1; i < as->nb_streams; i++)
222  if (first_width != s->streams[as->streams[i]]->codecpar->width)
223  return 0;
224  return 1;
225 }
226 
227 /*
228  * Checks if height of all streams are the same. Returns 1 if true, 0 otherwise.
229  */
231  int first_height, i;
232  if (as->nb_streams < 2) return 1;
233  first_height = s->streams[as->streams[0]]->codecpar->height;
234  for (i = 1; i < as->nb_streams; i++)
235  if (first_height != s->streams[as->streams[i]]->codecpar->height)
236  return 0;
237  return 1;
238 }
239 
240 /*
241  * Checks if sample rate of all streams are the same. Returns 1 if true, 0 otherwise.
242  */
244  int first_sample_rate, i;
245  if (as->nb_streams < 2) return 1;
246  first_sample_rate = s->streams[as->streams[0]]->codecpar->sample_rate;
247  for (i = 1; i < as->nb_streams; i++)
248  if (first_sample_rate != s->streams[as->streams[i]]->codecpar->sample_rate)
249  return 0;
250  return 1;
251 }
252 
255  int i;
256  for (i = 0; i < w->nb_as; i++) {
257  av_freep(&w->as[i].streams);
258  }
259  av_freep(&w->as);
260  w->nb_as = 0;
261 }
262 
263 /*
264  * Parses a live header filename and computes the representation id,
265  * initialization pattern and the media pattern. Pass NULL if you don't want to
266  * compute any of those 3. Returns 0 on success and non-zero on failure.
267  *
268  * Name of the header file should conform to the following pattern:
269  * <file_description>_<representation_id>.hdr where <file_description> can be
270  * anything. The chunks should be named according to the following pattern:
271  * <file_description>_<representation_id>_<chunk_number>.chk
272  */
273 static int parse_filename(char *filename, char **representation_id,
274  char **initialization_pattern, char **media_pattern) {
275  char *underscore_pos = NULL;
276  char *period_pos = NULL;
277  char *filename_str = av_strdup(filename);
278  int ret = 0;
279 
280  if (!filename_str) {
281  ret = AVERROR(ENOMEM);
282  goto end;
283  }
284  underscore_pos = strrchr(filename_str, '_');
285  if (!underscore_pos) {
286  ret = AVERROR_INVALIDDATA;
287  goto end;
288  }
289  period_pos = strchr(++underscore_pos, '.');
290  if (!period_pos) {
291  ret = AVERROR_INVALIDDATA;
292  goto end;
293  }
294  *(underscore_pos - 1) = 0;
295  if (representation_id) {
296  *representation_id = av_malloc(period_pos - underscore_pos + 1);
297  if (!(*representation_id)) {
298  ret = AVERROR(ENOMEM);
299  goto end;
300  }
301  av_strlcpy(*representation_id, underscore_pos, period_pos - underscore_pos + 1);
302  }
303  if (initialization_pattern) {
304  *initialization_pattern = av_asprintf("%s_$RepresentationID$.hdr",
305  filename_str);
306  if (!(*initialization_pattern)) {
307  ret = AVERROR(ENOMEM);
308  goto end;
309  }
310  }
311  if (media_pattern) {
312  *media_pattern = av_asprintf("%s_$RepresentationID$_$Number$.chk",
313  filename_str);
314  if (!(*media_pattern)) {
315  ret = AVERROR(ENOMEM);
316  goto end;
317  }
318  }
319 
320 end:
321  av_freep(&filename_str);
322  return ret;
323 }
324 
325 /*
326  * Writes an Adaptation Set. Returns 0 on success and < 0 on failure.
327  */
328 static int write_adaptation_set(AVFormatContext *s, int as_index)
329 {
331  AdaptationSet *as = &w->as[as_index];
333  AVDictionaryEntry *lang;
334  int i;
335  static const char boolean[2][6] = { "false", "true" };
336  int subsegmentStartsWithSAP = 1;
337 
338  // Width, Height and Sample Rate will go in the AdaptationSet tag if they
339  // are the same for all contained Representations. otherwise, they will go
340  // on their respective Representation tag. For live streams, they always go
341  // in the Representation tag.
342  int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1;
343  if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
344  width_in_as = !w->is_live && check_matching_width(s, as);
345  height_in_as = !w->is_live && check_matching_height(s, as);
346  } else {
347  sample_rate_in_as = !w->is_live && check_matching_sample_rate(s, as);
348  }
349 
350  avio_printf(s->pb, "<AdaptationSet id=\"%s\"", as->id);
351  avio_printf(s->pb, " mimeType=\"%s/webm\"",
352  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
353  avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(par->codec_id));
354 
355  lang = av_dict_get(s->streams[as->streams[0]]->metadata, "language", NULL, 0);
356  if (lang) avio_printf(s->pb, " lang=\"%s\"", lang->value);
357 
358  if (par->codec_type == AVMEDIA_TYPE_VIDEO && width_in_as)
359  avio_printf(s->pb, " width=\"%d\"", par->width);
360  if (par->codec_type == AVMEDIA_TYPE_VIDEO && height_in_as)
361  avio_printf(s->pb, " height=\"%d\"", par->height);
362  if (par->codec_type == AVMEDIA_TYPE_AUDIO && sample_rate_in_as)
363  avio_printf(s->pb, " audioSamplingRate=\"%d\"", par->sample_rate);
364 
365  avio_printf(s->pb, " bitstreamSwitching=\"%s\"",
366  boolean[bitstream_switching(s, as)]);
367  avio_printf(s->pb, " subsegmentAlignment=\"%s\"",
368  boolean[w->is_live || subsegment_alignment(s, as)]);
369 
370  for (i = 0; i < as->nb_streams; i++) {
372  CLUSTER_KEYFRAME, NULL, 0);
373  if (!w->is_live && (!kf || !strncmp(kf->value, "0", 1))) subsegmentStartsWithSAP = 0;
374  }
375  avio_printf(s->pb, " subsegmentStartsWithSAP=\"%d\"", subsegmentStartsWithSAP);
376  avio_printf(s->pb, ">\n");
377 
378  if (w->is_live) {
379  AVDictionaryEntry *filename =
380  av_dict_get(s->streams[as->streams[0]]->metadata, FILENAME, NULL, 0);
381  char *initialization_pattern = NULL;
382  char *media_pattern = NULL;
383  int ret = parse_filename(filename->value, NULL, &initialization_pattern,
384  &media_pattern);
385  if (ret) return ret;
386  avio_printf(s->pb, "<ContentComponent id=\"1\" type=\"%s\"/>\n",
387  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
388  avio_printf(s->pb, "<SegmentTemplate");
389  avio_printf(s->pb, " timescale=\"1000\"");
390  avio_printf(s->pb, " duration=\"%d\"", w->chunk_duration);
391  avio_printf(s->pb, " media=\"%s\"", media_pattern);
392  avio_printf(s->pb, " startNumber=\"%d\"", w->chunk_start_index);
393  avio_printf(s->pb, " initialization=\"%s\"", initialization_pattern);
394  avio_printf(s->pb, "/>\n");
395  av_free(initialization_pattern);
396  av_free(media_pattern);
397  }
398 
399  for (i = 0; i < as->nb_streams; i++) {
400  char *representation_id = NULL;
401  int ret;
402  if (w->is_live) {
403  AVDictionaryEntry *filename =
404  av_dict_get(s->streams[as->streams[i]]->metadata, FILENAME, NULL, 0);
405  if (!filename)
406  return AVERROR(EINVAL);
407  if (ret = parse_filename(filename->value, &representation_id, NULL, NULL))
408  return ret;
409  } else {
410  representation_id = av_asprintf("%d", w->representation_id++);
411  if (!representation_id) return AVERROR(ENOMEM);
412  }
413  ret = write_representation(s, s->streams[as->streams[i]],
414  representation_id, !width_in_as,
415  !height_in_as, !sample_rate_in_as);
416  av_free(representation_id);
417  if (ret) return ret;
418  }
419  avio_printf(s->pb, "</AdaptationSet>\n");
420  return 0;
421 }
422 
424 {
426  char *p = w->adaptation_sets;
427  char *q;
428  enum { new_set, parsed_id, parsing_streams } state;
429  if (!w->adaptation_sets) {
430  av_log(s, AV_LOG_ERROR, "The 'adaptation_sets' option must be set.\n");
431  return AVERROR(EINVAL);
432  }
433  // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
434  state = new_set;
435  while (1) {
436  if (*p == '\0') {
437  if (state == new_set)
438  break;
439  else
440  return AVERROR(EINVAL);
441  } else if (state == new_set && *p == ' ') {
442  p++;
443  continue;
444  } else if (state == new_set && !strncmp(p, "id=", 3)) {
445  void *mem = av_realloc(w->as, sizeof(*w->as) * (w->nb_as + 1));
446  const char *comma;
447  if (mem == NULL)
448  return AVERROR(ENOMEM);
449  w->as = mem;
450  ++w->nb_as;
451  w->as[w->nb_as - 1].nb_streams = 0;
452  w->as[w->nb_as - 1].streams = NULL;
453  p += 3; // consume "id="
454  q = w->as[w->nb_as - 1].id;
455  comma = strchr(p, ',');
456  if (!comma || comma - p >= sizeof(w->as[w->nb_as - 1].id)) {
457  av_log(s, AV_LOG_ERROR, "'id' in 'adaptation_sets' is malformed.\n");
458  return AVERROR(EINVAL);
459  }
460  while (*p != ',') *q++ = *p++;
461  *q = 0;
462  p++;
463  state = parsed_id;
464  } else if (state == parsed_id && !strncmp(p, "streams=", 8)) {
465  p += 8; // consume "streams="
466  state = parsing_streams;
467  } else if (state == parsing_streams) {
468  struct AdaptationSet *as = &w->as[w->nb_as - 1];
469  int64_t num;
470  int ret = av_reallocp_array(&as->streams, ++as->nb_streams,
471  sizeof(*as->streams));
472  if (ret < 0)
473  return ret;
474  num = strtoll(p, &q, 10);
475  if (!av_isdigit(*p) || (*q != ' ' && *q != '\0' && *q != ',') ||
476  num < 0 || num >= s->nb_streams) {
477  av_log(s, AV_LOG_ERROR, "Invalid value for 'streams' in adapation_sets.\n");
478  return AVERROR(EINVAL);
479  }
480  as->streams[as->nb_streams - 1] = num;
481  if (*q == '\0') break;
482  if (*q == ' ') state = new_set;
483  p = ++q;
484  } else {
485  return -1;
486  }
487  }
488  return 0;
489 }
490 
492 {
493  int i;
494  double start = 0.0;
495  int ret;
497 
498  for (unsigned i = 0; i < s->nb_streams; i++) {
500  if (codec_id != AV_CODEC_ID_VP8 && codec_id != AV_CODEC_ID_VP9 &&
501  codec_id != AV_CODEC_ID_VORBIS && codec_id != AV_CODEC_ID_OPUS)
502  return AVERROR(EINVAL);
503  }
504 
505  ret = parse_adaptation_sets(s);
506  if (ret < 0) {
507  goto fail;
508  }
509  ret = write_header(s);
510  if (ret < 0) {
511  goto fail;
512  }
513  avio_printf(s->pb, "<Period id=\"0\"");
514  avio_printf(s->pb, " start=\"PT%gS\"", start);
515  if (!w->is_live) {
516  avio_printf(s->pb, " duration=\"PT%gS\"", get_duration(s));
517  }
518  avio_printf(s->pb, " >\n");
519 
520  for (i = 0; i < w->nb_as; i++) {
521  ret = write_adaptation_set(s, i);
522  if (ret < 0) {
523  goto fail;
524  }
525  }
526 
527  avio_printf(s->pb, "</Period>\n");
528  write_footer(s);
529 fail:
531  return ret < 0 ? ret : 0;
532 }
533 
535 {
536  return AVERROR_EOF;
537 }
538 
539 #define OFFSET(x) offsetof(WebMDashMuxContext, x)
540 static const AVOption options[] = {
541  { "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 },
542  { "live", "create a live stream manifest", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
543  { "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 },
544  { "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 },
545  { "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 },
546  { "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 },
547  { "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 },
548  { NULL },
549 };
550 
551 static const AVClass webm_dash_class = {
552  .class_name = "WebM DASH Manifest muxer",
553  .item_name = av_default_item_name,
554  .option = options,
555  .version = LIBAVUTIL_VERSION_INT,
556 };
557 
559  .name = "webm_dash_manifest",
560  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
561  .mime_type = "application/xml",
562  .extensions = "xml",
563  .priv_data_size = sizeof(WebMDashMuxContext),
566  .priv_class = &webm_dash_class,
567 };
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:701
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
void * av_realloc(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory.
Definition: mem.c:135
static struct @314 state
static av_const int av_isdigit(int c)
Locale-independent conversion of ASCII isdigit.
Definition: avstring.h:206
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
#define INITIALIZATION_RANGE
Definition: matroska.h:370
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
static int subsegment_alignment(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:126
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
static AVPacket pkt
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
AVOutputFormat ff_webm_dash_manifest_muxer
Definition: webmdashenc.c:558
Format I/O context.
Definition: avformat.h:1351
#define gmtime_r
Definition: time_internal.h:34
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
Public dictionary API.
#define av_malloc(s)
int width
Video only.
Definition: codec_par.h:126
AVOptions.
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
#define TRACK_NUMBER
Definition: matroska.h:378
AdaptationSet * as
Definition: webmdashenc.c:50
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int64_t duration
Definition: movenc.c:63
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
int flags
Flags modifying the (de)muxer behaviour.
Definition: avformat.h:1482
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define max(a, b)
Definition: cuda_runtime.h:33
#define AVFMT_FLAG_BITEXACT
When muxing, try to avoid writing any random/volatile data to the output.
Definition: avformat.h:1499
#define av_log(a,...)
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
#define FILENAME
Definition: matroska.h:373
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: codec_id.h:46
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define AVERROR(e)
Definition: error.h:43
static const AVOption options[]
Definition: webmdashenc.c:540
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: webmdashenc.c:534
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
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 fail()
Definition: checkasm.h:123
static int check_matching_sample_rate(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:243
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:78
static int webm_dash_manifest_write_header(AVFormatContext *s)
Definition: webmdashenc.c:491
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:208
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
static int write_header(AVFormatContext *s)
Definition: webmdashenc.c:79
double time_shift_buffer_depth
Definition: webmdashenc.c:57
#define OFFSET(x)
Definition: webmdashenc.c:539
static void write_footer(AVFormatContext *s)
Definition: webmdashenc.c:121
uint8_t w
Definition: llviddspenc.c:38
char * adaptation_sets
Definition: webmdashenc.c:49
#define CLUSTER_KEYFRAME
Definition: matroska.h:376
const char * name
Definition: avformat.h:500
static double get_duration(AVFormatContext *s)
Definition: webmdashenc.c:66
#define DURATION
Definition: matroska.h:375
#define s(width, name)
Definition: cbs_vp9.c:257
static const char * get_codec_name(int codec_id)
Definition: webmdashenc.c:61
AVDictionary * metadata
Definition: avformat.h:940
enum AVCodecID codec_id
Definition: vaapi_decode.c:369
AVRational par
Definition: dashenc.c:95
Stream structure.
Definition: avformat.h:876
#define CUES_END
Definition: matroska.h:372
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:255
#define BANDWIDTH
Definition: matroska.h:374
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int nb_streams
Definition: dashenc.c:94
#define CUE_TIMESTAMPS
Definition: matroska.h:377
Describe the class of an AVClass context structure.
Definition: log.h:67
static int parse_filename(char *filename, char **representation_id, char **initialization_pattern, char **media_pattern)
Definition: webmdashenc.c:273
static int check_matching_height(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:230
const char * name
Name of the codec described by this descriptor.
Definition: codec_desc.h:46
static void free_adaptation_sets(AVFormatContext *s)
Definition: webmdashenc.c:253
int sample_rate
Audio only.
Definition: codec_par.h:170
Main libavformat public API header.
#define AVERROR_UNKNOWN
Unknown error, typically from an external library.
Definition: error.h:71
#define av_free(p)
char * value
Definition: dict.h:87
void * priv_data
Format private data.
Definition: avformat.h:1379
static const AVClass webm_dash_class
Definition: webmdashenc.c:551
static int write_adaptation_set(AVFormatContext *s, int as_index)
Definition: webmdashenc.c:328
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
Definition: codec_desc.c:3394
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
static int bitstream_switching(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:139
#define av_freep(p)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
static int parse_adaptation_sets(AVFormatContext *s)
Definition: webmdashenc.c:423
static int check_matching_width(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:217
#define CUES_START
Definition: matroska.h:371
This structure stores compressed data.
Definition: packet.h:332
static int write_representation(AVFormatContext *s, AVStream *stream, char *id, int output_width, int output_height, int output_sample_rate)
Definition: webmdashenc.c:164
int avio_printf(AVIOContext *s, const char *fmt,...) av_printf_format(2
Writes a formatted string to the context.