1 /*
2 * copyright (c) 2007 Luca Abeni
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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
23 #include "libavutil/avstring.h"
24 #include "libavutil/base64.h"
25 #include "libavutil/dict.h"
26 #include "libavutil/parseutils.h"
27 #include "libavutil/opt.h"
28 #include "libavcodec/xiph.h"
29 #include "libavcodec/mpeg4audio.h"
30 #include "avformat.h"
31 #include "internal.h"
32 #include "avc.h"
33 #include "rtp.h"
34
35 #if CONFIG_NETWORK
36 #include "network.h"
37 #endif
38
39 #if CONFIG_RTP_MUXER
40 #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
41
42 struct sdp_session_level {
43 int sdp_version; /**< protocol version (currently 0) */
44 int id; /**< session ID */
45 int version; /**< session version */
46 int start_time; /**< session start time (NTP time, in seconds),
47 or 0 in case of permanent session */
48 int end_time; /**< session end time (NTP time, in seconds),
49 or 0 if the session is not bounded */
50 int ttl; /**< TTL, in case of multicast stream */
51 const char *user; /**< username of the session's creator */
52 const char *src_addr; /**< IP address of the machine from which the session was created */
53 const char *src_type; /**< address type of src_addr */
54 const char *dst_addr; /**< destination IP address (can be multicast) */
55 const char *dst_type; /**< destination IP address type */
56 const char *name; /**< session name (can be an empty string) */
57 };
58
sdp_write_address(char * buff,int size,const char * dest_addr,const char * dest_type,int ttl)59 static void sdp_write_address(char *buff, int size, const char *dest_addr,
60 const char *dest_type, int ttl)
61 {
62 if (dest_addr) {
63 if (!dest_type)
64 dest_type = "IP4";
65 if (ttl > 0 && !strcmp(dest_type, "IP4")) {
66 /* The TTL should only be specified for IPv4 multicast addresses,
67 * not for IPv6. */
68 av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
69 } else {
70 av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
71 }
72 }
73 }
74
sdp_write_header(char * buff,int size,struct sdp_session_level * s)75 static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
76 {
77 av_strlcatf(buff, size, "v=%d\r\n"
78 "o=- %d %d IN %s %s\r\n"
79 "s=%s\r\n",
80 s->sdp_version,
81 s->id, s->version, s->src_type, s->src_addr,
82 s->name);
83 sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
84 av_strlcatf(buff, size, "t=%d %d\r\n"
85 "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
86 s->start_time, s->end_time);
87 }
88
89 #if CONFIG_NETWORK
resolve_destination(char * dest_addr,int size,char * type,int type_size)90 static int resolve_destination(char *dest_addr, int size, char *type,
91 int type_size)
92 {
93 struct addrinfo hints = { 0 }, *ai;
94 int is_multicast;
95
96 av_strlcpy(type, "IP4", type_size);
97 if (!dest_addr[0])
98 return 0;
99
100 /* Resolve the destination, since it must be written
101 * as a numeric IP address in the SDP. */
102
103 if (getaddrinfo(dest_addr, NULL, &hints, &ai))
104 return 0;
105 getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
106 NULL, 0, NI_NUMERICHOST);
107 #ifdef AF_INET6
108 if (ai->ai_family == AF_INET6)
109 av_strlcpy(type, "IP6", type_size);
110 #endif
111 is_multicast = ff_is_multicast_address(ai->ai_addr);
112 freeaddrinfo(ai);
113 return is_multicast;
114 }
115 #else
resolve_destination(char * dest_addr,int size,char * type,int type_size)116 static int resolve_destination(char *dest_addr, int size, char *type,
117 int type_size)
118 {
119 return 0;
120 }
121 #endif
122
sdp_get_address(char * dest_addr,int size,int * ttl,const char * url)123 static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
124 {
125 int port;
126 const char *p;
127 char proto[32];
128
129 av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
130
131 *ttl = 0;
132
133 if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) {
134 /* The url isn't for the actual rtp sessions,
135 * don't parse out anything else than the destination.
136 */
137 return 0;
138 }
139
140 p = strchr(url, '?');
141 if (p) {
142 char buff[64];
143
144 if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
145 *ttl = strtol(buff, NULL, 10);
146 } else {
147 *ttl = 5;
148 }
149 }
150
151 return port;
152 }
153
154 #define MAX_PSET_SIZE 1024
extradata2psets(AVCodecContext * c)155 static char *extradata2psets(AVCodecContext *c)
156 {
157 char *psets, *p;
158 const uint8_t *r;
159 static const char pset_string[] = "; sprop-parameter-sets=";
160 static const char profile_string[] = "; profile-level-id=";
161 uint8_t *orig_extradata = NULL;
162 int orig_extradata_size = 0;
163 const uint8_t *sps = NULL;
164 const uint8_t *sps_end = NULL;
165
166 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
167 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
168
169 return NULL;
170 }
171 if (c->extradata[0] == 1) {
172 uint8_t *dummy_p;
173 int dummy_int;
174 AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb");
175
176 if (!bsfc) {
177 av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
178
179 return NULL;
180 }
181
182 orig_extradata_size = c->extradata_size;
183 orig_extradata = av_mallocz(orig_extradata_size +
184 FF_INPUT_BUFFER_PADDING_SIZE);
185 if (!orig_extradata) {
186 av_bitstream_filter_close(bsfc);
187 return NULL;
188 }
189 memcpy(orig_extradata, c->extradata, orig_extradata_size);
190 av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0);
191 av_bitstream_filter_close(bsfc);
192 }
193
194 psets = av_mallocz(MAX_PSET_SIZE);
195 if (!psets) {
196 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
197 av_free(orig_extradata);
198 return NULL;
199 }
200 memcpy(psets, pset_string, strlen(pset_string));
201 p = psets + strlen(pset_string);
202 r = ff_avc_find_startcode(c->extradata, c->extradata + c->extradata_size);
203 while (r < c->extradata + c->extradata_size) {
204 const uint8_t *r1;
205 uint8_t nal_type;
206
207 while (!*(r++));
208 nal_type = *r & 0x1f;
209 r1 = ff_avc_find_startcode(r, c->extradata + c->extradata_size);
210 if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
211 r = r1;
212 continue;
213 }
214 if (p != (psets + strlen(pset_string))) {
215 *p = ',';
216 p++;
217 }
218 if (!sps) {
219 sps = r;
220 sps_end = r1;
221 }
222 if (!av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r)) {
223 av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
224 av_free(psets);
225
226 return NULL;
227 }
228 p += strlen(p);
229 r = r1;
230 }
231 if (sps && sps_end - sps >= 4) {
232 memcpy(p, profile_string, strlen(profile_string));
233 p += strlen(p);
234 ff_data_to_hex(p, sps + 1, 3, 0);
235 p[6] = '\0';
236 }
237 if (orig_extradata) {
238 av_free(c->extradata);
239 c->extradata = orig_extradata;
240 c->extradata_size = orig_extradata_size;
241 }
242
243 return psets;
244 }
245
extradata2config(AVCodecContext * c)246 static char *extradata2config(AVCodecContext *c)
247 {
248 char *config;
249
250 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
251 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
252
253 return NULL;
254 }
255 config = av_malloc(10 + c->extradata_size * 2);
256 if (!config) {
257 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
258 return NULL;
259 }
260 memcpy(config, "; config=", 9);
261 ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0);
262 config[9 + c->extradata_size * 2] = 0;
263
264 return config;
265 }
266
xiph_extradata2config(AVCodecContext * c)267 static char *xiph_extradata2config(AVCodecContext *c)
268 {
269 char *config, *encoded_config;
270 uint8_t *header_start[3];
271 int headers_len, header_len[3], config_len;
272 int first_header_size;
273
274 switch (c->codec_id) {
275 case AV_CODEC_ID_THEORA:
276 first_header_size = 42;
277 break;
278 case AV_CODEC_ID_VORBIS:
279 first_header_size = 30;
280 break;
281 default:
282 av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
283 return NULL;
284 }
285
286 if (avpriv_split_xiph_headers(c->extradata, c->extradata_size,
287 first_header_size, header_start,
288 header_len) < 0) {
289 av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n");
290 return NULL;
291 }
292
293 headers_len = header_len[0] + header_len[2];
294 config_len = 4 + // count
295 3 + // ident
296 2 + // packet size
297 1 + // header count
298 2 + // header size
299 headers_len; // and the rest
300
301 config = av_malloc(config_len);
302 if (!config)
303 goto xiph_fail;
304
305 encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
306 if (!encoded_config) {
307 av_free(config);
308 goto xiph_fail;
309 }
310
311 config[0] = config[1] = config[2] = 0;
312 config[3] = 1;
313 config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
314 config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
315 config[6] = (RTP_XIPH_IDENT ) & 0xff;
316 config[7] = (headers_len >> 8) & 0xff;
317 config[8] = headers_len & 0xff;
318 config[9] = 2;
319 config[10] = header_len[0];
320 config[11] = 0; // size of comment header; nonexistent
321 memcpy(config + 12, header_start[0], header_len[0]);
322 memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
323
324 av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
325 config, config_len);
326 av_free(config);
327
328 return encoded_config;
329
330 xiph_fail:
331 av_log(c, AV_LOG_ERROR,
332 "Not enough memory for configuration string\n");
333 return NULL;
334 }
335
latm_context2profilelevel(AVCodecContext * c)336 static int latm_context2profilelevel(AVCodecContext *c)
337 {
338 /* MP4A-LATM
339 * The RTP payload format specification is described in RFC 3016
340 * The encoding specifications are provided in ISO/IEC 14496-3 */
341
342 int profile_level = 0x2B;
343
344 /* TODO: AAC Profile only supports AAC LC Object Type.
345 * Different Object Types should implement different Profile Levels */
346
347 if (c->sample_rate <= 24000) {
348 if (c->channels <= 2)
349 profile_level = 0x28; // AAC Profile, Level 1
350 } else if (c->sample_rate <= 48000) {
351 if (c->channels <= 2) {
352 profile_level = 0x29; // AAC Profile, Level 2
353 } else if (c->channels <= 5) {
354 profile_level = 0x2A; // AAC Profile, Level 4
355 }
356 } else if (c->sample_rate <= 96000) {
357 if (c->channels <= 5) {
358 profile_level = 0x2B; // AAC Profile, Level 5
359 }
360 }
361
362 return profile_level;
363 }
364
latm_context2config(AVCodecContext * c)365 static char *latm_context2config(AVCodecContext *c)
366 {
367 /* MP4A-LATM
368 * The RTP payload format specification is described in RFC 3016
369 * The encoding specifications are provided in ISO/IEC 14496-3 */
370
371 uint8_t config_byte[6];
372 int rate_index;
373 char *config;
374
375 for (rate_index = 0; rate_index < 16; rate_index++)
376 if (avpriv_mpeg4audio_sample_rates[rate_index] == c->sample_rate)
377 break;
378 if (rate_index == 16) {
379 av_log(c, AV_LOG_ERROR, "Unsupported sample rate\n");
380 return NULL;
381 }
382
383 config_byte[0] = 0x40;
384 config_byte[1] = 0;
385 config_byte[2] = 0x20 | rate_index;
386 config_byte[3] = c->channels << 4;
387 config_byte[4] = 0x3f;
388 config_byte[5] = 0xc0;
389
390 config = av_malloc(6*2+1);
391 if (!config) {
392 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
393 return NULL;
394 }
395 ff_data_to_hex(config, config_byte, 6, 1);
396 config[12] = 0;
397
398 return config;
399 }
400
sdp_write_media_attributes(char * buff,int size,AVCodecContext * c,int payload_type,AVFormatContext * fmt)401 static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type, AVFormatContext *fmt)
402 {
403 char *config = NULL;
404
405 switch (c->codec_id) {
406 case AV_CODEC_ID_H264: {
407 int mode = 1;
408 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
409 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
410 mode = 0;
411 if (c->extradata_size) {
412 config = extradata2psets(c);
413 }
414 av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
415 "a=fmtp:%d packetization-mode=%d%s\r\n",
416 payload_type,
417 payload_type, mode, config ? config : "");
418 break;
419 }
420 case AV_CODEC_ID_H261:
421 {
422 const char *pic_fmt = NULL;
423 /* only QCIF and CIF are specified as supported in RFC 4587 */
424 if (c->width == 176 && c->height == 144)
425 pic_fmt = "QCIF=1";
426 if (c->width == 352 && c->height == 288)
427 pic_fmt = "CIF=1";
428 av_strlcatf(buff, size, "a=rtpmap:%d H261/90000\r\n", payload_type);
429 if (pic_fmt)
430 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n", payload_type, pic_fmt);
431 break;
432 }
433 case AV_CODEC_ID_H263:
434 case AV_CODEC_ID_H263P:
435 /* a=framesize is required by 3GPP TS 26.234 (PSS). It
436 * actually specifies the maximum video size, but we only know
437 * the current size. This is required for playback on Android
438 * stagefright and on Samsung bada. */
439 if (!fmt || !fmt->oformat->priv_class ||
440 !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
441 c->codec_id == AV_CODEC_ID_H263P)
442 av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
443 "a=framesize:%d %d-%d\r\n",
444 payload_type,
445 payload_type, c->width, c->height);
446 break;
447 case AV_CODEC_ID_MPEG4:
448 if (c->extradata_size) {
449 config = extradata2config(c);
450 }
451 av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
452 "a=fmtp:%d profile-level-id=1%s\r\n",
453 payload_type,
454 payload_type, config ? config : "");
455 break;
456 case AV_CODEC_ID_AAC:
457 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
458 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
459 config = latm_context2config(c);
460 if (!config)
461 return NULL;
462 av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
463 "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
464 payload_type, c->sample_rate, c->channels,
465 payload_type, latm_context2profilelevel(c), config);
466 } else {
467 if (c->extradata_size) {
468 config = extradata2config(c);
469 } else {
470 /* FIXME: maybe we can forge config information based on the
471 * codec parameters...
472 */
473 av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
474 return NULL;
475 }
476 if (!config) {
477 return NULL;
478 }
479 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
480 "a=fmtp:%d profile-level-id=1;"
481 "mode=AAC-hbr;sizelength=13;indexlength=3;"
482 "indexdeltalength=3%s\r\n",
483 payload_type, c->sample_rate, c->channels,
484 payload_type, config);
485 }
486 break;
487 case AV_CODEC_ID_PCM_S16BE:
488 if (payload_type >= RTP_PT_PRIVATE)
489 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
490 payload_type,
491 c->sample_rate, c->channels);
492 break;
493 case AV_CODEC_ID_PCM_MULAW:
494 if (payload_type >= RTP_PT_PRIVATE)
495 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
496 payload_type,
497 c->sample_rate, c->channels);
498 break;
499 case AV_CODEC_ID_PCM_ALAW:
500 if (payload_type >= RTP_PT_PRIVATE)
501 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
502 payload_type,
503 c->sample_rate, c->channels);
504 break;
505 case AV_CODEC_ID_AMR_NB:
506 av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
507 "a=fmtp:%d octet-align=1\r\n",
508 payload_type, c->sample_rate, c->channels,
509 payload_type);
510 break;
511 case AV_CODEC_ID_AMR_WB:
512 av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
513 "a=fmtp:%d octet-align=1\r\n",
514 payload_type, c->sample_rate, c->channels,
515 payload_type);
516 break;
517 case AV_CODEC_ID_VORBIS:
518 if (c->extradata_size)
519 config = xiph_extradata2config(c);
520 else
521 av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n");
522 if (!config)
523 return NULL;
524
525 av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
526 "a=fmtp:%d configuration=%s\r\n",
527 payload_type, c->sample_rate, c->channels,
528 payload_type, config);
529 break;
530 case AV_CODEC_ID_THEORA: {
531 const char *pix_fmt;
532 switch (c->pix_fmt) {
533 case AV_PIX_FMT_YUV420P:
534 pix_fmt = "YCbCr-4:2:0";
535 break;
536 case AV_PIX_FMT_YUV422P:
537 pix_fmt = "YCbCr-4:2:2";
538 break;
539 case AV_PIX_FMT_YUV444P:
540 pix_fmt = "YCbCr-4:4:4";
541 break;
542 default:
543 av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n");
544 return NULL;
545 }
546
547 if (c->extradata_size)
548 config = xiph_extradata2config(c);
549 else
550 av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n");
551 if (!config)
552 return NULL;
553
554 av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
555 "a=fmtp:%d delivery-method=inline; "
556 "width=%d; height=%d; sampling=%s; "
557 "configuration=%s\r\n",
558 payload_type, payload_type,
559 c->width, c->height, pix_fmt, config);
560 break;
561 }
562 case AV_CODEC_ID_VP8:
563 av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
564 payload_type);
565 break;
566 case AV_CODEC_ID_MJPEG:
567 if (payload_type >= RTP_PT_PRIVATE)
568 av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
569 payload_type);
570 break;
571 case AV_CODEC_ID_ADPCM_G722:
572 if (payload_type >= RTP_PT_PRIVATE)
573 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
574 payload_type,
575 8000, c->channels);
576 break;
577 case AV_CODEC_ID_ADPCM_G726: {
578 if (payload_type >= RTP_PT_PRIVATE)
579 av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
580 payload_type,
581 c->bits_per_coded_sample*8,
582 c->sample_rate);
583 break;
584 }
585 case AV_CODEC_ID_ILBC:
586 av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
587 "a=fmtp:%d mode=%d\r\n",
588 payload_type, c->sample_rate,
589 payload_type, c->block_align == 38 ? 20 : 30);
590 break;
591 case AV_CODEC_ID_SPEEX:
592 av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
593 payload_type, c->sample_rate);
594 if (c->codec) {
595 const char *mode;
596 uint64_t vad_option;
597
598 if (c->flags & CODEC_FLAG_QSCALE)
599 mode = "on";
600 else if (!av_opt_get_int(c, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option)
601 mode = "vad";
602 else
603 mode = "off";
604
605 av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n",
606 payload_type, mode);
607 }
608 break;
609 case AV_CODEC_ID_OPUS:
610 av_strlcatf(buff, size, "a=rtpmap:%d opus/48000\r\n",
611 payload_type);
612 break;
613 default:
614 /* Nothing special to do here... */
615 break;
616 }
617
618 av_free(config);
619
620 return buff;
621 }
622
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)623 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
624 const char *dest_addr, const char *dest_type,
625 int port, int ttl, AVFormatContext *fmt)
626 {
627 AVCodecContext *c = st->codec;
628 const char *type;
629 int payload_type;
630
631 payload_type = ff_rtp_get_payload_type(fmt, c, idx);
632
633 switch (c->codec_type) {
634 case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
635 case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
636 case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
637 default : type = "application"; break;
638 }
639
640 av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
641 sdp_write_address(buff, size, dest_addr, dest_type, ttl);
642 if (c->bit_rate) {
643 av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000);
644 }
645
646 sdp_write_media_attributes(buff, size, c, payload_type, fmt);
647 }
648
av_sdp_create(AVFormatContext * ac[],int n_files,char * buf,int size)649 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
650 {
651 AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
652 struct sdp_session_level s = { 0 };
653 int i, j, port, ttl, is_multicast, index = 0;
654 char dst[32], dst_type[5];
655
656 memset(buf, 0, size);
657 s.user = "-";
658 s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
659 s.src_type = "IP4";
660 s.name = title ? title->value : "No Name";
661
662 port = 0;
663 ttl = 0;
664 if (n_files == 1) {
665 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename);
666 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
667 sizeof(dst_type));
668 if (!is_multicast)
669 ttl = 0;
670 if (dst[0]) {
671 s.dst_addr = dst;
672 s.dst_type = dst_type;
673 s.ttl = ttl;
674 if (!strcmp(dst_type, "IP6")) {
675 s.src_addr = "::1";
676 s.src_type = "IP6";
677 }
678 }
679 }
680 sdp_write_header(buf, size, &s);
681
682 dst[0] = 0;
683 for (i = 0; i < n_files; i++) {
684 if (n_files != 1) {
685 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename);
686 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
687 sizeof(dst_type));
688 if (!is_multicast)
689 ttl = 0;
690 }
691 for (j = 0; j < ac[i]->nb_streams; j++) {
692 ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
693 dst[0] ? dst : NULL, dst_type,
694 (port > 0) ? port + j * 2 : 0,
695 ttl, ac[i]);
696 if (port <= 0) {
697 av_strlcatf(buf, size,
698 "a=control:streamid=%d\r\n", i + j);
699 }
700 if (ac[i]->pb && ac[i]->pb->av_class) {
701 uint8_t *crypto_suite = NULL, *crypto_params = NULL;
702 av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN,
703 &crypto_suite);
704 av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
705 &crypto_params);
706 if (crypto_suite && crypto_suite[0])
707 av_strlcatf(buf, size,
708 "a=crypto:1 %s inline:%s\r\n",
709 crypto_suite, crypto_params);
710 av_free(crypto_suite);
711 av_free(crypto_params);
712 }
713 }
714 }
715
716 return 0;
717 }
718 #else
av_sdp_create(AVFormatContext * ac[],int n_files,char * buf,int size)719 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
720 {
721 return AVERROR(ENOSYS);
722 }
723
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)724 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
725 const char *dest_addr, const char *dest_type,
726 int port, int ttl, AVFormatContext *fmt)
727 {
728 }
729 #endif
730