FFmpeg  4.3.8
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:mpeg: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 && (!irange || !cues_start || !cues_end || !filename || !bandwidth)) {
175  return AVERROR_INVALIDDATA;
176  }
177  avio_printf(s->pb, "<Representation id=\"%s\"", id);
178  // if bandwidth for live was not provided, use a default
179  if (w->is_live && !bandwidth) {
180  bandwidth_str = (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) ? "128000" : "1000000";
181  } else {
182  bandwidth_str = bandwidth->value;
183  }
184  avio_printf(s->pb, " bandwidth=\"%s\"", bandwidth_str);
185  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && output_width)
186  avio_printf(s->pb, " width=\"%d\"", stream->codecpar->width);
187  if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && output_height)
188  avio_printf(s->pb, " height=\"%d\"", stream->codecpar->height);
189  if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && output_sample_rate)
190  avio_printf(s->pb, " audioSamplingRate=\"%d\"", stream->codecpar->sample_rate);
191  if (w->is_live) {
192  // For live streams, Codec and Mime Type always go in the Representation tag.
193  avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(stream->codecpar->codec_id));
194  avio_printf(s->pb, " mimeType=\"%s/webm\"",
195  stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
196  // For live streams, subsegments always start with key frames. So this
197  // is always 1.
198  avio_printf(s->pb, " startsWithSAP=\"1\"");
199  avio_printf(s->pb, ">");
200  } else {
201  avio_printf(s->pb, ">\n");
202  avio_printf(s->pb, "<BaseURL>%s</BaseURL>\n", filename->value);
203  avio_printf(s->pb, "<SegmentBase\n");
204  avio_printf(s->pb, " indexRange=\"%s-%s\">\n", cues_start->value, cues_end->value);
205  avio_printf(s->pb, "<Initialization\n");
206  avio_printf(s->pb, " range=\"0-%s\" />\n", irange->value);
207  avio_printf(s->pb, "</SegmentBase>\n");
208  }
209  avio_printf(s->pb, "</Representation>\n");
210  return 0;
211 }
212 
213 /*
214  * Checks if width of all streams are the same. Returns 1 if true, 0 otherwise.
215  */
217  int first_width, i;
218  if (as->nb_streams < 2) return 1;
219  first_width = s->streams[as->streams[0]]->codecpar->width;
220  for (i = 1; i < as->nb_streams; i++)
221  if (first_width != s->streams[as->streams[i]]->codecpar->width)
222  return 0;
223  return 1;
224 }
225 
226 /*
227  * Checks if height of all streams are the same. Returns 1 if true, 0 otherwise.
228  */
230  int first_height, i;
231  if (as->nb_streams < 2) return 1;
232  first_height = s->streams[as->streams[0]]->codecpar->height;
233  for (i = 1; i < as->nb_streams; i++)
234  if (first_height != s->streams[as->streams[i]]->codecpar->height)
235  return 0;
236  return 1;
237 }
238 
239 /*
240  * Checks if sample rate of all streams are the same. Returns 1 if true, 0 otherwise.
241  */
243  int first_sample_rate, i;
244  if (as->nb_streams < 2) return 1;
245  first_sample_rate = s->streams[as->streams[0]]->codecpar->sample_rate;
246  for (i = 1; i < as->nb_streams; i++)
247  if (first_sample_rate != s->streams[as->streams[i]]->codecpar->sample_rate)
248  return 0;
249  return 1;
250 }
251 
254  int i;
255  for (i = 0; i < w->nb_as; i++) {
256  av_freep(&w->as[i].streams);
257  }
258  av_freep(&w->as);
259  w->nb_as = 0;
260 }
261 
262 /*
263  * Parses a live header filename and returns the position of the '_' and '.'
264  * delimiting <file_description> and <representation_id>.
265  *
266  * Name of the header file should conform to the following pattern:
267  * <file_description>_<representation_id>.hdr where <file_description> can be
268  * anything. The chunks should be named according to the following pattern:
269  * <file_description>_<representation_id>_<chunk_number>.chk
270  */
271 static int split_filename(char *filename, char **underscore_pos,
272  char **period_pos)
273 {
274  *underscore_pos = strrchr(filename, '_');
275  if (!*underscore_pos)
276  return AVERROR(EINVAL);
277  *period_pos = strchr(*underscore_pos, '.');
278  if (!*period_pos)
279  return AVERROR(EINVAL);
280  return 0;
281 }
282 
283 /*
284  * Writes an Adaptation Set. Returns 0 on success and < 0 on failure.
285  */
286 static int write_adaptation_set(AVFormatContext *s, int as_index)
287 {
289  AdaptationSet *as = &w->as[as_index];
291  AVDictionaryEntry *lang;
292  int i;
293  static const char boolean[2][6] = { "false", "true" };
294  int subsegmentStartsWithSAP = 1;
295 
296  // Width, Height and Sample Rate will go in the AdaptationSet tag if they
297  // are the same for all contained Representations. otherwise, they will go
298  // on their respective Representation tag. For live streams, they always go
299  // in the Representation tag.
300  int width_in_as = 1, height_in_as = 1, sample_rate_in_as = 1;
301  if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
302  width_in_as = !w->is_live && check_matching_width(s, as);
303  height_in_as = !w->is_live && check_matching_height(s, as);
304  } else {
305  sample_rate_in_as = !w->is_live && check_matching_sample_rate(s, as);
306  }
307 
308  avio_printf(s->pb, "<AdaptationSet id=\"%s\"", as->id);
309  avio_printf(s->pb, " mimeType=\"%s/webm\"",
310  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
311  avio_printf(s->pb, " codecs=\"%s\"", get_codec_name(par->codec_id));
312 
313  lang = av_dict_get(s->streams[as->streams[0]]->metadata, "language", NULL, 0);
314  if (lang) avio_printf(s->pb, " lang=\"%s\"", lang->value);
315 
316  if (par->codec_type == AVMEDIA_TYPE_VIDEO && width_in_as)
317  avio_printf(s->pb, " width=\"%d\"", par->width);
318  if (par->codec_type == AVMEDIA_TYPE_VIDEO && height_in_as)
319  avio_printf(s->pb, " height=\"%d\"", par->height);
320  if (par->codec_type == AVMEDIA_TYPE_AUDIO && sample_rate_in_as)
321  avio_printf(s->pb, " audioSamplingRate=\"%d\"", par->sample_rate);
322 
323  avio_printf(s->pb, " bitstreamSwitching=\"%s\"",
324  boolean[bitstream_switching(s, as)]);
325  avio_printf(s->pb, " subsegmentAlignment=\"%s\"",
326  boolean[w->is_live || subsegment_alignment(s, as)]);
327 
328  for (i = 0; i < as->nb_streams; i++) {
330  CLUSTER_KEYFRAME, NULL, 0);
331  if (!w->is_live && (!kf || !strncmp(kf->value, "0", 1))) subsegmentStartsWithSAP = 0;
332  }
333  avio_printf(s->pb, " subsegmentStartsWithSAP=\"%d\"", subsegmentStartsWithSAP);
334  avio_printf(s->pb, ">\n");
335 
336  if (w->is_live) {
337  AVDictionaryEntry *filename =
338  av_dict_get(s->streams[as->streams[0]]->metadata, FILENAME, NULL, 0);
339  char *underscore_pos, *period_pos;
340  int ret;
341  if (!filename)
342  return AVERROR(EINVAL);
343  ret = split_filename(filename->value, &underscore_pos, &period_pos);
344  if (ret) return ret;
345  *underscore_pos = '\0';
346  avio_printf(s->pb, "<ContentComponent id=\"1\" type=\"%s\"/>\n",
347  par->codec_type == AVMEDIA_TYPE_VIDEO ? "video" : "audio");
348  avio_printf(s->pb, "<SegmentTemplate");
349  avio_printf(s->pb, " timescale=\"1000\"");
350  avio_printf(s->pb, " duration=\"%d\"", w->chunk_duration);
351  avio_printf(s->pb, " media=\"%s_$RepresentationID$_$Number$.chk\"",
352  filename->value);
353  avio_printf(s->pb, " startNumber=\"%d\"", w->chunk_start_index);
354  avio_printf(s->pb, " initialization=\"%s_$RepresentationID$.hdr\"",
355  filename->value);
356  avio_printf(s->pb, "/>\n");
357  *underscore_pos = '_';
358  }
359 
360  for (i = 0; i < as->nb_streams; i++) {
361  char buf[25], *representation_id = buf, *underscore_pos, *period_pos;
362  int ret;
363  if (w->is_live) {
364  AVDictionaryEntry *filename =
365  av_dict_get(s->streams[as->streams[i]]->metadata, FILENAME, NULL, 0);
366  if (!filename)
367  return AVERROR(EINVAL);
368  ret = split_filename(filename->value, &underscore_pos, &period_pos);
369  if (ret < 0)
370  return ret;
371  representation_id = underscore_pos + 1;
372  *period_pos = '\0';
373  } else {
374  snprintf(buf, sizeof(buf), "%d", w->representation_id++);
375  }
376  ret = write_representation(s, s->streams[as->streams[i]],
377  representation_id, !width_in_as,
378  !height_in_as, !sample_rate_in_as);
379  if (ret) return ret;
380  if (w->is_live)
381  *period_pos = '.';
382  }
383  avio_printf(s->pb, "</AdaptationSet>\n");
384  return 0;
385 }
386 
388 {
390  char *p = w->adaptation_sets;
391  char *q;
392  enum { new_set, parsed_id, parsing_streams } state;
393  if (!w->adaptation_sets) {
394  av_log(s, AV_LOG_ERROR, "The 'adaptation_sets' option must be set.\n");
395  return AVERROR(EINVAL);
396  }
397  // syntax id=0,streams=0,1,2 id=1,streams=3,4 and so on
398  state = new_set;
399  while (1) {
400  if (*p == '\0') {
401  if (state == new_set)
402  break;
403  else
404  return AVERROR(EINVAL);
405  } else if (state == new_set && *p == ' ') {
406  p++;
407  continue;
408  } else if (state == new_set && !strncmp(p, "id=", 3)) {
409  void *mem = av_realloc(w->as, sizeof(*w->as) * (w->nb_as + 1));
410  const char *comma;
411  if (mem == NULL)
412  return AVERROR(ENOMEM);
413  w->as = mem;
414  ++w->nb_as;
415  w->as[w->nb_as - 1].nb_streams = 0;
416  w->as[w->nb_as - 1].streams = NULL;
417  p += 3; // consume "id="
418  q = w->as[w->nb_as - 1].id;
419  comma = strchr(p, ',');
420  if (!comma || comma - p >= sizeof(w->as[w->nb_as - 1].id)) {
421  av_log(s, AV_LOG_ERROR, "'id' in 'adaptation_sets' is malformed.\n");
422  return AVERROR(EINVAL);
423  }
424  while (*p != ',') *q++ = *p++;
425  *q = 0;
426  p++;
427  state = parsed_id;
428  } else if (state == parsed_id && !strncmp(p, "streams=", 8)) {
429  p += 8; // consume "streams="
430  state = parsing_streams;
431  } else if (state == parsing_streams) {
432  struct AdaptationSet *as = &w->as[w->nb_as - 1];
433  int64_t num;
434  int ret = av_reallocp_array(&as->streams, ++as->nb_streams,
435  sizeof(*as->streams));
436  if (ret < 0)
437  return ret;
438  num = strtoll(p, &q, 10);
439  if (!av_isdigit(*p) || (*q != ' ' && *q != '\0' && *q != ',') ||
440  num < 0 || num >= s->nb_streams) {
441  av_log(s, AV_LOG_ERROR, "Invalid value for 'streams' in adapation_sets.\n");
442  return AVERROR(EINVAL);
443  }
444  as->streams[as->nb_streams - 1] = num;
445  if (*q == '\0') break;
446  if (*q == ' ') state = new_set;
447  p = ++q;
448  } else {
449  return -1;
450  }
451  }
452  return 0;
453 }
454 
456 {
457  int i;
458  double start = 0.0;
459  int ret;
461 
462  for (unsigned i = 0; i < s->nb_streams; i++) {
464  if (codec_id != AV_CODEC_ID_VP8 && codec_id != AV_CODEC_ID_VP9 &&
465  codec_id != AV_CODEC_ID_VORBIS && codec_id != AV_CODEC_ID_OPUS)
466  return AVERROR(EINVAL);
467  }
468 
469  ret = parse_adaptation_sets(s);
470  if (ret < 0) {
471  goto fail;
472  }
473  ret = write_header(s);
474  if (ret < 0) {
475  goto fail;
476  }
477  avio_printf(s->pb, "<Period id=\"0\"");
478  avio_printf(s->pb, " start=\"PT%gS\"", start);
479  if (!w->is_live) {
480  avio_printf(s->pb, " duration=\"PT%gS\"", get_duration(s));
481  }
482  avio_printf(s->pb, " >\n");
483 
484  for (i = 0; i < w->nb_as; i++) {
485  ret = write_adaptation_set(s, i);
486  if (ret < 0) {
487  goto fail;
488  }
489  }
490 
491  avio_printf(s->pb, "</Period>\n");
492  write_footer(s);
493 fail:
495  return ret < 0 ? ret : 0;
496 }
497 
499 {
500  return AVERROR_EOF;
501 }
502 
503 #define OFFSET(x) offsetof(WebMDashMuxContext, x)
504 static const AVOption options[] = {
505  { "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 },
506  { "live", "create a live stream manifest", OFFSET(is_live), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM },
507  { "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 },
508  { "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 },
509  { "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 },
510  { "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 },
511  { "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 },
512  { NULL },
513 };
514 
515 static const AVClass webm_dash_class = {
516  .class_name = "WebM DASH Manifest muxer",
517  .item_name = av_default_item_name,
518  .option = options,
519  .version = LIBAVUTIL_VERSION_INT,
520 };
521 
523  .name = "webm_dash_manifest",
524  .long_name = NULL_IF_CONFIG_SMALL("WebM DASH Manifest"),
525  .mime_type = "application/xml",
526  .extensions = "xml",
527  .priv_data_size = sizeof(WebMDashMuxContext),
530  .priv_class = &webm_dash_class,
531 };
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:703
#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:134
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:522
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.
int width
Video only.
Definition: codec_par.h:126
AVOptions.
#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:504
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
static int webm_dash_manifest_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: webmdashenc.c:498
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:242
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:455
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
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:503
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
static int split_filename(char *filename, char **underscore_pos, char **period_pos)
Definition: webmdashenc.c:271
#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
#define BANDWIDTH
Definition: matroska.h:374
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int nb_streams
Definition: dashenc.c:94
long long int64_t
Definition: coverity.c:34
#define CUE_TIMESTAMPS
Definition: matroska.h:377
Describe the class of an AVClass context structure.
Definition: log.h:67
static int check_matching_height(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:229
const char * name
Name of the codec described by this descriptor.
Definition: codec_desc.h:46
#define snprintf
Definition: snprintf.h:34
static void free_adaptation_sets(AVFormatContext *s)
Definition: webmdashenc.c:252
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
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:515
static int write_adaptation_set(AVFormatContext *s, int as_index)
Definition: webmdashenc.c:286
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:387
static int check_matching_width(AVFormatContext *s, AdaptationSet *as)
Definition: webmdashenc.c:216
#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.