Libav
sdp.c
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1 /*
2  * copyright (c) 2007 Luca Abeni
3  *
4  * This file is part of Libav.
5  *
6  * Libav is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * Libav is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include <string.h>
22 #include "libavutil/avstring.h"
23 #include "libavutil/base64.h"
24 #include "libavutil/dict.h"
25 #include "libavutil/parseutils.h"
26 #include "libavutil/opt.h"
27 #include "libavcodec/xiph.h"
28 #include "libavcodec/mpeg4audio.h"
29 #include "avformat.h"
30 #include "internal.h"
31 #include "avc.h"
32 #include "rtp.h"
33 #if CONFIG_NETWORK
34 #include "network.h"
35 #endif
36 
37 #if CONFIG_RTP_MUXER
38 #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
39 
40 struct sdp_session_level {
41  int sdp_version;
42  int id;
43  int version;
44  int start_time;
46  int end_time;
48  int ttl;
49  const char *user;
50  const char *src_addr;
51  const char *src_type;
52  const char *dst_addr;
53  const char *dst_type;
54  const char *name;
55 };
56 
57 static void sdp_write_address(char *buff, int size, const char *dest_addr,
58  const char *dest_type, int ttl)
59 {
60  if (dest_addr) {
61  if (!dest_type)
62  dest_type = "IP4";
63  if (ttl > 0 && !strcmp(dest_type, "IP4")) {
64  /* The TTL should only be specified for IPv4 multicast addresses,
65  * not for IPv6. */
66  av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
67  } else {
68  av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
69  }
70  }
71 }
72 
73 static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
74 {
75  av_strlcatf(buff, size, "v=%d\r\n"
76  "o=- %d %d IN %s %s\r\n"
77  "s=%s\r\n",
78  s->sdp_version,
79  s->id, s->version, s->src_type, s->src_addr,
80  s->name);
81  sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
82  av_strlcatf(buff, size, "t=%d %d\r\n"
83  "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
84  s->start_time, s->end_time);
85 }
86 
87 #if CONFIG_NETWORK
88 static int resolve_destination(char *dest_addr, int size, char *type,
89  int type_size)
90 {
91  struct addrinfo hints = { 0 }, *ai;
92  int is_multicast;
93 
94  av_strlcpy(type, "IP4", type_size);
95  if (!dest_addr[0])
96  return 0;
97 
98  /* Resolve the destination, since it must be written
99  * as a numeric IP address in the SDP. */
100 
101  if (getaddrinfo(dest_addr, NULL, &hints, &ai))
102  return 0;
103  getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
104  NULL, 0, NI_NUMERICHOST);
105 #ifdef AF_INET6
106  if (ai->ai_family == AF_INET6)
107  av_strlcpy(type, "IP6", type_size);
108 #endif
109  is_multicast = ff_is_multicast_address(ai->ai_addr);
110  freeaddrinfo(ai);
111  return is_multicast;
112 }
113 #else
114 static int resolve_destination(char *dest_addr, int size, char *type,
115  int type_size)
116 {
117  return 0;
118 }
119 #endif
120 
121 static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
122 {
123  int port;
124  const char *p;
125  char proto[32];
126 
127  av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
128 
129  *ttl = 0;
130 
131  if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) {
132  /* The url isn't for the actual rtp sessions,
133  * don't parse out anything else than the destination.
134  */
135  return 0;
136  }
137 
138  p = strchr(url, '?');
139  if (p) {
140  char buff[64];
141 
142  if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
143  *ttl = strtol(buff, NULL, 10);
144  } else {
145  *ttl = 5;
146  }
147  }
148 
149  return port;
150 }
151 
152 #define MAX_PSET_SIZE 1024
153 static char *extradata2psets(AVCodecContext *c)
154 {
155  char *psets, *p;
156  const uint8_t *r;
157  static const char pset_string[] = "; sprop-parameter-sets=";
158  static const char profile_string[] = "; profile-level-id=";
159  uint8_t *orig_extradata = NULL;
160  int orig_extradata_size = 0;
161  const uint8_t *sps = NULL, *sps_end;
162 
163  if (c->extradata_size > MAX_EXTRADATA_SIZE) {
164  av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
165 
166  return NULL;
167  }
168  if (c->extradata[0] == 1) {
169  uint8_t *dummy_p;
170  int dummy_int;
171  AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb");
172 
173  if (!bsfc) {
174  av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
175 
176  return NULL;
177  }
178 
179  orig_extradata_size = c->extradata_size;
180  orig_extradata = av_mallocz(orig_extradata_size +
182  if (!orig_extradata) {
184  return NULL;
185  }
186  memcpy(orig_extradata, c->extradata, orig_extradata_size);
187  av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0);
189  }
190 
191  psets = av_mallocz(MAX_PSET_SIZE);
192  if (psets == NULL) {
193  av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
194  av_free(orig_extradata);
195  return NULL;
196  }
197  memcpy(psets, pset_string, strlen(pset_string));
198  p = psets + strlen(pset_string);
200  while (r < c->extradata + c->extradata_size) {
201  const uint8_t *r1;
202  uint8_t nal_type;
203 
204  while (!*(r++));
205  nal_type = *r & 0x1f;
207  if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
208  r = r1;
209  continue;
210  }
211  if (p != (psets + strlen(pset_string))) {
212  *p = ',';
213  p++;
214  }
215  if (!sps) {
216  sps = r;
217  sps_end = r1;
218  }
219  if (av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r) == NULL) {
220  av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %td %td!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
221  av_free(psets);
222 
223  return NULL;
224  }
225  p += strlen(p);
226  r = r1;
227  }
228  if (sps && sps_end - sps >= 4) {
229  memcpy(p, profile_string, strlen(profile_string));
230  p += strlen(p);
231  ff_data_to_hex(p, sps + 1, 3, 0);
232  p[6] = '\0';
233  }
234  if (orig_extradata) {
235  av_free(c->extradata);
236  c->extradata = orig_extradata;
237  c->extradata_size = orig_extradata_size;
238  }
239 
240  return psets;
241 }
242 
243 static char *extradata2config(AVCodecContext *c)
244 {
245  char *config;
246 
247  if (c->extradata_size > MAX_EXTRADATA_SIZE) {
248  av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
249 
250  return NULL;
251  }
252  config = av_malloc(10 + c->extradata_size * 2);
253  if (config == NULL) {
254  av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
255  return NULL;
256  }
257  memcpy(config, "; config=", 9);
258  ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0);
259  config[9 + c->extradata_size * 2] = 0;
260 
261  return config;
262 }
263 
264 static char *xiph_extradata2config(AVCodecContext *c)
265 {
266  char *config, *encoded_config;
267  uint8_t *header_start[3];
268  int headers_len, header_len[3], config_len;
269  int first_header_size;
270 
271  switch (c->codec_id) {
272  case AV_CODEC_ID_THEORA:
273  first_header_size = 42;
274  break;
275  case AV_CODEC_ID_VORBIS:
276  first_header_size = 30;
277  break;
278  default:
279  av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
280  return NULL;
281  }
282 
284  first_header_size, header_start,
285  header_len) < 0) {
286  av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n");
287  return NULL;
288  }
289 
290  headers_len = header_len[0] + header_len[2];
291  config_len = 4 + // count
292  3 + // ident
293  2 + // packet size
294  1 + // header count
295  2 + // header size
296  headers_len; // and the rest
297 
298  config = av_malloc(config_len);
299  if (!config)
300  goto xiph_fail;
301 
302  encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
303  if (!encoded_config) {
304  av_free(config);
305  goto xiph_fail;
306  }
307 
308  config[0] = config[1] = config[2] = 0;
309  config[3] = 1;
310  config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
311  config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
312  config[6] = (RTP_XIPH_IDENT ) & 0xff;
313  config[7] = (headers_len >> 8) & 0xff;
314  config[8] = headers_len & 0xff;
315  config[9] = 2;
316  config[10] = header_len[0];
317  config[11] = 0; // size of comment header; nonexistent
318  memcpy(config + 12, header_start[0], header_len[0]);
319  memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
320 
321  av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
322  config, config_len);
323  av_free(config);
324 
325  return encoded_config;
326 
327 xiph_fail:
328  av_log(c, AV_LOG_ERROR,
329  "Not enough memory for configuration string\n");
330  return NULL;
331 }
332 
333 static int latm_context2profilelevel(AVCodecContext *c)
334 {
335  /* MP4A-LATM
336  * The RTP payload format specification is described in RFC 3016
337  * The encoding specifications are provided in ISO/IEC 14496-3 */
338 
339  int profile_level = 0x2B;
340 
341  /* TODO: AAC Profile only supports AAC LC Object Type.
342  * Different Object Types should implement different Profile Levels */
343 
344  if (c->sample_rate <= 24000) {
345  if (c->channels <= 2)
346  profile_level = 0x28; // AAC Profile, Level 1
347  } else if (c->sample_rate <= 48000) {
348  if (c->channels <= 2) {
349  profile_level = 0x29; // AAC Profile, Level 2
350  } else if (c->channels <= 5) {
351  profile_level = 0x2A; // AAC Profile, Level 4
352  }
353  } else if (c->sample_rate <= 96000) {
354  if (c->channels <= 5) {
355  profile_level = 0x2B; // AAC Profile, Level 5
356  }
357  }
358 
359  return profile_level;
360 }
361 
362 static char *latm_context2config(AVCodecContext *c)
363 {
364  /* MP4A-LATM
365  * The RTP payload format specification is described in RFC 3016
366  * The encoding specifications are provided in ISO/IEC 14496-3 */
367 
368  uint8_t config_byte[6];
369  int rate_index;
370  char *config;
371 
372  for (rate_index = 0; rate_index < 16; rate_index++)
373  if (avpriv_mpeg4audio_sample_rates[rate_index] == c->sample_rate)
374  break;
375  if (rate_index == 16) {
376  av_log(c, AV_LOG_ERROR, "Unsupported sample rate\n");
377  return NULL;
378  }
379 
380  config_byte[0] = 0x40;
381  config_byte[1] = 0;
382  config_byte[2] = 0x20 | rate_index;
383  config_byte[3] = c->channels << 4;
384  config_byte[4] = 0x3f;
385  config_byte[5] = 0xc0;
386 
387  config = av_malloc(6*2+1);
388  if (!config) {
389  av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
390  return NULL;
391  }
392  ff_data_to_hex(config, config_byte, 6, 1);
393  config[12] = 0;
394 
395  return config;
396 }
397 
398 static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type, AVFormatContext *fmt)
399 {
400  char *config = NULL;
401 
402  switch (c->codec_id) {
403  case AV_CODEC_ID_H264: {
404  int mode = 1;
405  if (fmt && fmt->oformat && fmt->oformat->priv_class &&
406  av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
407  mode = 0;
408  if (c->extradata_size) {
409  config = extradata2psets(c);
410  }
411  av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
412  "a=fmtp:%d packetization-mode=%d%s\r\n",
413  payload_type,
414  payload_type, mode, config ? config : "");
415  break;
416  }
417  case AV_CODEC_ID_H263:
418  case AV_CODEC_ID_H263P:
419  /* a=framesize is required by 3GPP TS 26.234 (PSS). It
420  * actually specifies the maximum video size, but we only know
421  * the current size. This is required for playback on Android
422  * stagefright and on Samsung bada. */
423  if (!fmt || !fmt->oformat->priv_class ||
424  !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
426  av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
427  "a=framesize:%d %d-%d\r\n",
428  payload_type,
429  payload_type, c->width, c->height);
430  break;
431  case AV_CODEC_ID_MPEG4:
432  if (c->extradata_size) {
433  config = extradata2config(c);
434  }
435  av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
436  "a=fmtp:%d profile-level-id=1%s\r\n",
437  payload_type,
438  payload_type, config ? config : "");
439  break;
440  case AV_CODEC_ID_AAC:
441  if (fmt && fmt->oformat->priv_class &&
442  av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
443  config = latm_context2config(c);
444  if (!config)
445  return NULL;
446  av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
447  "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
448  payload_type, c->sample_rate, c->channels,
449  payload_type, latm_context2profilelevel(c), config);
450  } else {
451  if (c->extradata_size) {
452  config = extradata2config(c);
453  } else {
454  /* FIXME: maybe we can forge config information based on the
455  * codec parameters...
456  */
457  av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
458  return NULL;
459  }
460  if (config == NULL) {
461  return NULL;
462  }
463  av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
464  "a=fmtp:%d profile-level-id=1;"
465  "mode=AAC-hbr;sizelength=13;indexlength=3;"
466  "indexdeltalength=3%s\r\n",
467  payload_type, c->sample_rate, c->channels,
468  payload_type, config);
469  }
470  break;
472  if (payload_type >= RTP_PT_PRIVATE)
473  av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
474  payload_type,
475  c->sample_rate, c->channels);
476  break;
478  if (payload_type >= RTP_PT_PRIVATE)
479  av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
480  payload_type,
481  c->sample_rate, c->channels);
482  break;
484  if (payload_type >= RTP_PT_PRIVATE)
485  av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
486  payload_type,
487  c->sample_rate, c->channels);
488  break;
489  case AV_CODEC_ID_AMR_NB:
490  av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
491  "a=fmtp:%d octet-align=1\r\n",
492  payload_type, c->sample_rate, c->channels,
493  payload_type);
494  break;
495  case AV_CODEC_ID_AMR_WB:
496  av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
497  "a=fmtp:%d octet-align=1\r\n",
498  payload_type, c->sample_rate, c->channels,
499  payload_type);
500  break;
501  case AV_CODEC_ID_VORBIS:
502  if (c->extradata_size)
503  config = xiph_extradata2config(c);
504  else
505  av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n");
506  if (!config)
507  return NULL;
508 
509  av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
510  "a=fmtp:%d configuration=%s\r\n",
511  payload_type, c->sample_rate, c->channels,
512  payload_type, config);
513  break;
514  case AV_CODEC_ID_THEORA: {
515  const char *pix_fmt;
516  switch (c->pix_fmt) {
517  case AV_PIX_FMT_YUV420P:
518  pix_fmt = "YCbCr-4:2:0";
519  break;
520  case AV_PIX_FMT_YUV422P:
521  pix_fmt = "YCbCr-4:2:2";
522  break;
523  case AV_PIX_FMT_YUV444P:
524  pix_fmt = "YCbCr-4:4:4";
525  break;
526  default:
527  av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n");
528  return NULL;
529  }
530 
531  if (c->extradata_size)
532  config = xiph_extradata2config(c);
533  else
534  av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n");
535  if (!config)
536  return NULL;
537 
538  av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
539  "a=fmtp:%d delivery-method=inline; "
540  "width=%d; height=%d; sampling=%s; "
541  "configuration=%s\r\n",
542  payload_type, payload_type,
543  c->width, c->height, pix_fmt, config);
544  break;
545  }
546  case AV_CODEC_ID_VP8:
547  av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
548  payload_type);
549  break;
550  case AV_CODEC_ID_MJPEG:
551  if (payload_type >= RTP_PT_PRIVATE)
552  av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
553  payload_type);
554  break;
556  if (payload_type >= RTP_PT_PRIVATE)
557  av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
558  payload_type,
559  8000, c->channels);
560  break;
561  case AV_CODEC_ID_ADPCM_G726: {
562  if (payload_type >= RTP_PT_PRIVATE)
563  av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
564  payload_type,
566  c->sample_rate);
567  break;
568  }
569  case AV_CODEC_ID_ILBC:
570  av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
571  "a=fmtp:%d mode=%d\r\n",
572  payload_type, c->sample_rate,
573  payload_type, c->block_align == 38 ? 20 : 30);
574  break;
575  case AV_CODEC_ID_SPEEX:
576  av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
577  payload_type, c->sample_rate);
578  break;
579  case AV_CODEC_ID_OPUS:
580  av_strlcatf(buff, size, "a=rtpmap:%d opus/48000\r\n",
581  payload_type);
582  break;
583  default:
584  /* Nothing special to do here... */
585  break;
586  }
587 
588  av_free(config);
589 
590  return buff;
591 }
592 
593 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
594  const char *dest_addr, const char *dest_type,
595  int port, int ttl, AVFormatContext *fmt)
596 {
597  AVCodecContext *c = st->codec;
598  const char *type;
599  int payload_type;
600 
601  payload_type = ff_rtp_get_payload_type(fmt, c, idx);
602 
603  switch (c->codec_type) {
604  case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
605  case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
606  case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
607  default : type = "application"; break;
608  }
609 
610  av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
611  sdp_write_address(buff, size, dest_addr, dest_type, ttl);
612  if (c->bit_rate) {
613  av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000);
614  }
615 
616  sdp_write_media_attributes(buff, size, c, payload_type, fmt);
617 }
618 
619 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
620 {
621  AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
622  struct sdp_session_level s = { 0 };
623  int i, j, port, ttl, is_multicast, index = 0;
624  char dst[32], dst_type[5];
625 
626  memset(buf, 0, size);
627  s.user = "-";
628  s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
629  s.src_type = "IP4";
630  s.name = title ? title->value : "No Name";
631 
632  port = 0;
633  ttl = 0;
634  if (n_files == 1) {
635  port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename);
636  is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
637  sizeof(dst_type));
638  if (!is_multicast)
639  ttl = 0;
640  if (dst[0]) {
641  s.dst_addr = dst;
642  s.dst_type = dst_type;
643  s.ttl = ttl;
644  if (!strcmp(dst_type, "IP6")) {
645  s.src_addr = "::1";
646  s.src_type = "IP6";
647  }
648  }
649  }
650  sdp_write_header(buf, size, &s);
651 
652  dst[0] = 0;
653  for (i = 0; i < n_files; i++) {
654  if (n_files != 1) {
655  port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename);
656  is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
657  sizeof(dst_type));
658  if (!is_multicast)
659  ttl = 0;
660  }
661  for (j = 0; j < ac[i]->nb_streams; j++) {
662  ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
663  dst[0] ? dst : NULL, dst_type,
664  (port > 0) ? port + j * 2 : 0,
665  ttl, ac[i]);
666  if (port <= 0) {
667  av_strlcatf(buf, size,
668  "a=control:streamid=%d\r\n", i + j);
669  }
670  if (ac[i]->pb && ac[i]->pb->av_class) {
671  uint8_t *crypto_suite = NULL, *crypto_params = NULL;
672  av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN,
673  &crypto_suite);
674  av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
675  &crypto_params);
676  if (crypto_suite && crypto_suite[0])
677  av_strlcatf(buf, size,
678  "a=crypto:1 %s inline:%s\r\n",
679  crypto_suite, crypto_params);
680  av_free(crypto_suite);
681  av_free(crypto_params);
682  }
683  }
684  }
685 
686  return 0;
687 }
688 #else
689 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
690 {
691  return AVERROR(ENOSYS);
692 }
693 
694 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
695  const char *dest_addr, const char *dest_type,
696  int port, int ttl, AVFormatContext *fmt)
697 {
698 }
699 #endif
void av_url_split(char *proto, int proto_size, char *authorization, int authorization_size, char *hostname, int hostname_size, int *port_ptr, char *path, int path_size, const char *url)
Split a URL string into components.
Definition: utils.c:3092
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
int size
const uint8_t * ff_avc_find_startcode(const uint8_t *p, const uint8_t *end)
Definition: avc.c:64
enum AVCodecID id
Definition: mxfenc.c:84
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:70
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1247
#define freeaddrinfo
Definition: network.h:183
AVDictionaryEntry * av_dict_get(AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:1816
Format I/O context.
Definition: avformat.h:871
#define RTP_PT_PRIVATE
Definition: rtp.h:77
Public dictionary API.
uint8_t
AVOptions.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1162
const char * name
int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
Generate an SDP for an RTP session.
Definition: sdp.c:689
int av_find_info_tag(char *arg, int arg_size, const char *tag1, const char *info)
Attempt to find a specific tag in a URL.
Definition: parseutils.c:606
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2481
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:890
#define r
Definition: input.c:51
int ff_rtp_get_payload_type(AVFormatContext *fmt, AVCodecContext *codec, int idx)
Return the payload type for a given stream used in the given format context.
Definition: rtp.c:89
static int64_t start_time
Definition: avplay.c:245
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:123
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:186
#define AVERROR(e)
Definition: error.h:43
void av_bitstream_filter_close(AVBitStreamFilterContext *bsf)
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:148
char * av_base64_encode(char *out, int out_size, const uint8_t *in, int in_size)
Encode data to base64 and null-terminate.
Definition: base64.c:72
int ff_is_multicast_address(struct sockaddr *addr)
Definition: network.c:179
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:81
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:69
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:702
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition: avcodec.h:509
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:923
#define NI_NUMERICHOST
Definition: network.h:160
int bit_rate
the average bitrate
Definition: avcodec.h:1112
#define AV_BASE64_SIZE(x)
Calculate the output size needed to base64-encode x bytes.
Definition: base64.h:59
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:371
int width
picture width / height.
Definition: avcodec.h:1217
AVBitStreamFilterContext * av_bitstream_filter_init(const char *name)
enum AVPixelFormat pix_fmt
Definition: movenc.c:821
const AVClass * priv_class
AVClass for the private context.
Definition: avformat.h:465
Stream structure.
Definition: avformat.h:683
NULL
Definition: eval.c:55
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
enum AVMediaType codec_type
Definition: avcodec.h:1062
version
Definition: ffv1enc.c:1080
enum AVCodecID codec_id
Definition: avcodec.h:1065
int sample_rate
samples per second
Definition: avcodec.h:1779
main external API structure.
Definition: avcodec.h:1054
int extradata_size
Definition: avcodec.h:1163
#define AV_STRINGIFY(s)
Definition: macros.h:36
int index
Definition: gxfenc.c:72
const AVClass * av_class
A class for logging and AVOptions.
Definition: avformat.h:876
int avpriv_split_xiph_headers(uint8_t *extradata, int extradata_size, int first_header_size, uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
Definition: xiph.c:24
size_t av_strlcatf(char *dst, size_t size, const char *fmt,...)
Definition: avstring.c:99
misc parsing utilities
#define LIBAVFORMAT_VERSION
Definition: version.h:39
#define RTP_XIPH_IDENT
Definition: rtp.h:89
const int avpriv_mpeg4audio_sample_rates[16]
Definition: mpeg4audio.c:55
#define getaddrinfo
Definition: network.h:182
Main libavformat public API header.
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:65
#define getnameinfo
Definition: network.h:184
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:307
char * value
Definition: dict.h:76
int channels
number of audio channels
Definition: avcodec.h:1780
void * priv_data
Format private data.
Definition: avformat.h:899
int av_opt_flag_is_set(void *obj, const char *field_name, const char *flag_name)
Check whether a particular flag is set in a flags field.
Definition: opt.c:410
void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt)
Append the media-specific SDP fragment for the media stream c to the buffer buff. ...
Definition: sdp.c:694
char * ff_data_to_hex(char *buf, const uint8_t *src, int size, int lowercase)
Definition: utils.c:3159
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:205