Imported Debian version 2.5.2~trusty
[deb_ffmpeg.git] / ffmpeg / libavformat / sdp.c
... / ...
CommitLineData
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#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 "hevc.h"
33#include "rtp.h"
34#if CONFIG_NETWORK
35#include "network.h"
36#endif
37
38#if CONFIG_RTP_MUXER
39#define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
40
41struct sdp_session_level {
42 int sdp_version; /**< protocol version (currently 0) */
43 int id; /**< session ID */
44 int version; /**< session version */
45 int start_time; /**< session start time (NTP time, in seconds),
46 or 0 in case of permanent session */
47 int end_time; /**< session end time (NTP time, in seconds),
48 or 0 if the session is not bounded */
49 int ttl; /**< TTL, in case of multicast stream */
50 const char *user; /**< username of the session's creator */
51 const char *src_addr; /**< IP address of the machine from which the session was created */
52 const char *src_type; /**< address type of src_addr */
53 const char *dst_addr; /**< destination IP address (can be multicast) */
54 const char *dst_type; /**< destination IP address type */
55 const char *name; /**< session name (can be an empty string) */
56};
57
58static void sdp_write_address(char *buff, int size, const char *dest_addr,
59 const char *dest_type, int ttl)
60{
61 if (dest_addr) {
62 if (!dest_type)
63 dest_type = "IP4";
64 if (ttl > 0 && !strcmp(dest_type, "IP4")) {
65 /* The TTL should only be specified for IPv4 multicast addresses,
66 * not for IPv6. */
67 av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
68 } else {
69 av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
70 }
71 }
72}
73
74static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
75{
76 av_strlcatf(buff, size, "v=%d\r\n"
77 "o=- %d %d IN %s %s\r\n"
78 "s=%s\r\n",
79 s->sdp_version,
80 s->id, s->version, s->src_type, s->src_addr,
81 s->name);
82 sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
83 av_strlcatf(buff, size, "t=%d %d\r\n"
84 "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
85 s->start_time, s->end_time);
86}
87
88#if CONFIG_NETWORK
89static int resolve_destination(char *dest_addr, int size, char *type,
90 int type_size)
91{
92 struct addrinfo hints = { 0 }, *ai;
93 int is_multicast;
94
95 av_strlcpy(type, "IP4", type_size);
96 if (!dest_addr[0])
97 return 0;
98
99 /* Resolve the destination, since it must be written
100 * as a numeric IP address in the SDP. */
101
102 if (getaddrinfo(dest_addr, NULL, &hints, &ai))
103 return 0;
104 getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
105 NULL, 0, NI_NUMERICHOST);
106#ifdef AF_INET6
107 if (ai->ai_family == AF_INET6)
108 av_strlcpy(type, "IP6", type_size);
109#endif
110 is_multicast = ff_is_multicast_address(ai->ai_addr);
111 freeaddrinfo(ai);
112 return is_multicast;
113}
114#else
115static int resolve_destination(char *dest_addr, int size, char *type,
116 int type_size)
117{
118 return 0;
119}
120#endif
121
122static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
123{
124 int port;
125 const char *p;
126 char proto[32];
127
128 av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
129
130 *ttl = 0;
131
132 if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) {
133 /* The url isn't for the actual rtp sessions,
134 * don't parse out anything else than the destination.
135 */
136 return 0;
137 }
138
139 p = strchr(url, '?');
140 if (p) {
141 char buff[64];
142
143 if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
144 *ttl = strtol(buff, NULL, 10);
145 } else {
146 *ttl = 5;
147 }
148 }
149
150 return port;
151}
152
153#define MAX_PSET_SIZE 1024
154static char *extradata2psets(AVCodecContext *c)
155{
156 char *psets, *p;
157 const uint8_t *r;
158 static const char pset_string[] = "; sprop-parameter-sets=";
159 static const char profile_string[] = "; profile-level-id=";
160 uint8_t *extradata = c->extradata;
161 int extradata_size = c->extradata_size;
162 uint8_t *tmpbuf = NULL;
163 const uint8_t *sps = NULL, *sps_end;
164
165 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
166 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
167
168 return NULL;
169 }
170 if (c->extradata[0] == 1) {
171 if (ff_avc_write_annexb_extradata(c->extradata, &extradata,
172 &extradata_size))
173 return NULL;
174 tmpbuf = extradata;
175 }
176
177 psets = av_mallocz(MAX_PSET_SIZE);
178 if (!psets) {
179 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
180 av_free(tmpbuf);
181 return NULL;
182 }
183 memcpy(psets, pset_string, strlen(pset_string));
184 p = psets + strlen(pset_string);
185 r = ff_avc_find_startcode(extradata, extradata + extradata_size);
186 while (r < extradata + extradata_size) {
187 const uint8_t *r1;
188 uint8_t nal_type;
189
190 while (!*(r++));
191 nal_type = *r & 0x1f;
192 r1 = ff_avc_find_startcode(r, extradata + extradata_size);
193 if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
194 r = r1;
195 continue;
196 }
197 if (p != (psets + strlen(pset_string))) {
198 *p = ',';
199 p++;
200 }
201 if (!sps) {
202 sps = r;
203 sps_end = r1;
204 }
205 if (!av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r)) {
206 av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
207 av_free(psets);
208 av_free(tmpbuf);
209
210 return NULL;
211 }
212 p += strlen(p);
213 r = r1;
214 }
215 if (sps && sps_end - sps >= 4) {
216 memcpy(p, profile_string, strlen(profile_string));
217 p += strlen(p);
218 ff_data_to_hex(p, sps + 1, 3, 0);
219 p[6] = '\0';
220 }
221 av_free(tmpbuf);
222
223 return psets;
224}
225
226static char *extradata2psets_hevc(AVCodecContext *c)
227{
228 char *psets;
229 uint8_t *extradata = c->extradata;
230 int extradata_size = c->extradata_size;
231 uint8_t *tmpbuf = NULL;
232 int ps_pos[3] = { 0 };
233 static const char * const ps_names[3] = { "vps", "sps", "pps" };
234 int num_arrays, num_nalus;
235 int pos, i, j;
236
237 // Convert to hvcc format. Since we need to group multiple NALUs of
238 // the same type, and we might need to convert from one format to the
239 // other anyway, we get away with a little less work by using the hvcc
240 // format.
241 if (c->extradata[0] != 1) {
242 AVIOContext *pb;
243 if (avio_open_dyn_buf(&pb) < 0)
244 return NULL;
245 if (ff_isom_write_hvcc(pb, c->extradata, c->extradata_size, 0) < 0) {
246 avio_close_dyn_buf(pb, &tmpbuf);
247 goto err;
248 }
249 extradata_size = avio_close_dyn_buf(pb, &extradata);
250 tmpbuf = extradata;
251 }
252
253 if (extradata_size < 23)
254 goto err;
255
256 num_arrays = extradata[22];
257 pos = 23;
258 for (i = 0; i < num_arrays; i++) {
259 int num_nalus, nalu_type;
260 if (pos + 3 > extradata_size)
261 goto err;
262 nalu_type = extradata[pos] & 0x3f;
263 // Not including libavcodec/hevc.h to avoid confusion between
264 // NAL_* with the same name for both H264 and HEVC.
265 if (nalu_type == 32) // VPS
266 ps_pos[0] = pos;
267 else if (nalu_type == 33) // SPS
268 ps_pos[1] = pos;
269 else if (nalu_type == 34) // PPS
270 ps_pos[2] = pos;
271 num_nalus = AV_RB16(&extradata[pos + 1]);
272 pos += 3;
273 for (j = 0; j < num_nalus; j++) {
274 int len;
275 if (pos + 2 > extradata_size)
276 goto err;
277 len = AV_RB16(&extradata[pos]);
278 pos += 2;
279 if (pos + len > extradata_size)
280 goto err;
281 pos += len;
282 }
283 }
284 if (!ps_pos[0] || !ps_pos[1] || !ps_pos[2])
285 goto err;
286
287 psets = av_mallocz(MAX_PSET_SIZE);
288 if (!psets)
289 goto err;
290 psets[0] = '\0';
291
292 for (i = 0; i < 3; i++) {
293 pos = ps_pos[i];
294
295 if (i > 0)
296 av_strlcat(psets, "; ", MAX_PSET_SIZE);
297 av_strlcatf(psets, MAX_PSET_SIZE, "sprop-%s=", ps_names[i]);
298
299 // Skipping boundary checks in the input here; we've already traversed
300 // the whole hvcc structure above without issues
301 num_nalus = AV_RB16(&extradata[pos + 1]);
302 pos += 3;
303 for (j = 0; j < num_nalus; j++) {
304 int len = AV_RB16(&extradata[pos]);
305 int strpos;
306 pos += 2;
307 if (j > 0)
308 av_strlcat(psets, ",", MAX_PSET_SIZE);
309 strpos = strlen(psets);
310 if (!av_base64_encode(psets + strpos, MAX_PSET_SIZE - strpos,
311 &extradata[pos], len)) {
312 av_free(psets);
313 goto err;
314 }
315 pos += len;
316 }
317 }
318 av_free(tmpbuf);
319
320 return psets;
321
322err:
323 av_free(tmpbuf);
324 return NULL;
325}
326
327static char *extradata2config(AVCodecContext *c)
328{
329 char *config;
330
331 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
332 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
333
334 return NULL;
335 }
336 config = av_malloc(10 + c->extradata_size * 2);
337 if (!config) {
338 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
339 return NULL;
340 }
341 memcpy(config, "; config=", 9);
342 ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0);
343 config[9 + c->extradata_size * 2] = 0;
344
345 return config;
346}
347
348static char *xiph_extradata2config(AVCodecContext *c)
349{
350 char *config, *encoded_config;
351 uint8_t *header_start[3];
352 int headers_len, header_len[3], config_len;
353 int first_header_size;
354
355 switch (c->codec_id) {
356 case AV_CODEC_ID_THEORA:
357 first_header_size = 42;
358 break;
359 case AV_CODEC_ID_VORBIS:
360 first_header_size = 30;
361 break;
362 default:
363 av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
364 return NULL;
365 }
366
367 if (avpriv_split_xiph_headers(c->extradata, c->extradata_size,
368 first_header_size, header_start,
369 header_len) < 0) {
370 av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n");
371 return NULL;
372 }
373
374 headers_len = header_len[0] + header_len[2];
375 config_len = 4 + // count
376 3 + // ident
377 2 + // packet size
378 1 + // header count
379 2 + // header size
380 headers_len; // and the rest
381
382 config = av_malloc(config_len);
383 if (!config)
384 goto xiph_fail;
385
386 encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
387 if (!encoded_config) {
388 av_free(config);
389 goto xiph_fail;
390 }
391
392 config[0] = config[1] = config[2] = 0;
393 config[3] = 1;
394 config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
395 config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
396 config[6] = (RTP_XIPH_IDENT ) & 0xff;
397 config[7] = (headers_len >> 8) & 0xff;
398 config[8] = headers_len & 0xff;
399 config[9] = 2;
400 config[10] = header_len[0];
401 config[11] = 0; // size of comment header; nonexistent
402 memcpy(config + 12, header_start[0], header_len[0]);
403 memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
404
405 av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
406 config, config_len);
407 av_free(config);
408
409 return encoded_config;
410
411xiph_fail:
412 av_log(c, AV_LOG_ERROR,
413 "Not enough memory for configuration string\n");
414 return NULL;
415}
416
417static int latm_context2profilelevel(AVCodecContext *c)
418{
419 /* MP4A-LATM
420 * The RTP payload format specification is described in RFC 3016
421 * The encoding specifications are provided in ISO/IEC 14496-3 */
422
423 int profile_level = 0x2B;
424
425 /* TODO: AAC Profile only supports AAC LC Object Type.
426 * Different Object Types should implement different Profile Levels */
427
428 if (c->sample_rate <= 24000) {
429 if (c->channels <= 2)
430 profile_level = 0x28; // AAC Profile, Level 1
431 } else if (c->sample_rate <= 48000) {
432 if (c->channels <= 2) {
433 profile_level = 0x29; // AAC Profile, Level 2
434 } else if (c->channels <= 5) {
435 profile_level = 0x2A; // AAC Profile, Level 4
436 }
437 } else if (c->sample_rate <= 96000) {
438 if (c->channels <= 5) {
439 profile_level = 0x2B; // AAC Profile, Level 5
440 }
441 }
442
443 return profile_level;
444}
445
446static char *latm_context2config(AVCodecContext *c)
447{
448 /* MP4A-LATM
449 * The RTP payload format specification is described in RFC 3016
450 * The encoding specifications are provided in ISO/IEC 14496-3 */
451
452 uint8_t config_byte[6];
453 int rate_index;
454 char *config;
455
456 for (rate_index = 0; rate_index < 16; rate_index++)
457 if (avpriv_mpeg4audio_sample_rates[rate_index] == c->sample_rate)
458 break;
459 if (rate_index == 16) {
460 av_log(c, AV_LOG_ERROR, "Unsupported sample rate\n");
461 return NULL;
462 }
463
464 config_byte[0] = 0x40;
465 config_byte[1] = 0;
466 config_byte[2] = 0x20 | rate_index;
467 config_byte[3] = c->channels << 4;
468 config_byte[4] = 0x3f;
469 config_byte[5] = 0xc0;
470
471 config = av_malloc(6*2+1);
472 if (!config) {
473 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
474 return NULL;
475 }
476 ff_data_to_hex(config, config_byte, 6, 1);
477 config[12] = 0;
478
479 return config;
480}
481
482static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type, AVFormatContext *fmt)
483{
484 char *config = NULL;
485
486 switch (c->codec_id) {
487 case AV_CODEC_ID_H264: {
488 int mode = 1;
489 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
490 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
491 mode = 0;
492 if (c->extradata_size) {
493 config = extradata2psets(c);
494 }
495 av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
496 "a=fmtp:%d packetization-mode=%d%s\r\n",
497 payload_type,
498 payload_type, mode, config ? config : "");
499 break;
500 }
501 case AV_CODEC_ID_H261:
502 {
503 const char *pic_fmt = NULL;
504 /* only QCIF and CIF are specified as supported in RFC 4587 */
505 if (c->width == 176 && c->height == 144)
506 pic_fmt = "QCIF=1";
507 if (c->width == 352 && c->height == 288)
508 pic_fmt = "CIF=1";
509 av_strlcatf(buff, size, "a=rtpmap:%d H261/90000\r\n", payload_type);
510 if (pic_fmt)
511 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n", payload_type, pic_fmt);
512 break;
513 }
514 case AV_CODEC_ID_H263:
515 case AV_CODEC_ID_H263P:
516 /* a=framesize is required by 3GPP TS 26.234 (PSS). It
517 * actually specifies the maximum video size, but we only know
518 * the current size. This is required for playback on Android
519 * stagefright and on Samsung bada. */
520 if (!fmt || !fmt->oformat->priv_class ||
521 !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
522 c->codec_id == AV_CODEC_ID_H263P)
523 av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
524 "a=framesize:%d %d-%d\r\n",
525 payload_type,
526 payload_type, c->width, c->height);
527 break;
528 case AV_CODEC_ID_HEVC:
529 if (c->extradata_size)
530 config = extradata2psets_hevc(c);
531 av_strlcatf(buff, size, "a=rtpmap:%d H265/90000\r\n", payload_type);
532 if (config)
533 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n",
534 payload_type, config);
535 break;
536 case AV_CODEC_ID_MPEG4:
537 if (c->extradata_size) {
538 config = extradata2config(c);
539 }
540 av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
541 "a=fmtp:%d profile-level-id=1%s\r\n",
542 payload_type,
543 payload_type, config ? config : "");
544 break;
545 case AV_CODEC_ID_AAC:
546 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
547 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
548 config = latm_context2config(c);
549 if (!config)
550 return NULL;
551 av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
552 "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
553 payload_type, c->sample_rate, c->channels,
554 payload_type, latm_context2profilelevel(c), config);
555 } else {
556 if (c->extradata_size) {
557 config = extradata2config(c);
558 } else {
559 /* FIXME: maybe we can forge config information based on the
560 * codec parameters...
561 */
562 av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
563 return NULL;
564 }
565 if (!config) {
566 return NULL;
567 }
568 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
569 "a=fmtp:%d profile-level-id=1;"
570 "mode=AAC-hbr;sizelength=13;indexlength=3;"
571 "indexdeltalength=3%s\r\n",
572 payload_type, c->sample_rate, c->channels,
573 payload_type, config);
574 }
575 break;
576 case AV_CODEC_ID_PCM_S16BE:
577 if (payload_type >= RTP_PT_PRIVATE)
578 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
579 payload_type,
580 c->sample_rate, c->channels);
581 break;
582 case AV_CODEC_ID_PCM_MULAW:
583 if (payload_type >= RTP_PT_PRIVATE)
584 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
585 payload_type,
586 c->sample_rate, c->channels);
587 break;
588 case AV_CODEC_ID_PCM_ALAW:
589 if (payload_type >= RTP_PT_PRIVATE)
590 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
591 payload_type,
592 c->sample_rate, c->channels);
593 break;
594 case AV_CODEC_ID_AMR_NB:
595 av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
596 "a=fmtp:%d octet-align=1\r\n",
597 payload_type, c->sample_rate, c->channels,
598 payload_type);
599 break;
600 case AV_CODEC_ID_AMR_WB:
601 av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
602 "a=fmtp:%d octet-align=1\r\n",
603 payload_type, c->sample_rate, c->channels,
604 payload_type);
605 break;
606 case AV_CODEC_ID_VORBIS:
607 if (c->extradata_size)
608 config = xiph_extradata2config(c);
609 else
610 av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n");
611 if (!config)
612 return NULL;
613
614 av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
615 "a=fmtp:%d configuration=%s\r\n",
616 payload_type, c->sample_rate, c->channels,
617 payload_type, config);
618 break;
619 case AV_CODEC_ID_THEORA: {
620 const char *pix_fmt;
621 switch (c->pix_fmt) {
622 case AV_PIX_FMT_YUV420P:
623 pix_fmt = "YCbCr-4:2:0";
624 break;
625 case AV_PIX_FMT_YUV422P:
626 pix_fmt = "YCbCr-4:2:2";
627 break;
628 case AV_PIX_FMT_YUV444P:
629 pix_fmt = "YCbCr-4:4:4";
630 break;
631 default:
632 av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n");
633 return NULL;
634 }
635
636 if (c->extradata_size)
637 config = xiph_extradata2config(c);
638 else
639 av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n");
640 if (!config)
641 return NULL;
642
643 av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
644 "a=fmtp:%d delivery-method=inline; "
645 "width=%d; height=%d; sampling=%s; "
646 "configuration=%s\r\n",
647 payload_type, payload_type,
648 c->width, c->height, pix_fmt, config);
649 break;
650 }
651 case AV_CODEC_ID_VP8:
652 av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
653 payload_type);
654 break;
655 case AV_CODEC_ID_MJPEG:
656 if (payload_type >= RTP_PT_PRIVATE)
657 av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
658 payload_type);
659 break;
660 case AV_CODEC_ID_ADPCM_G722:
661 if (payload_type >= RTP_PT_PRIVATE)
662 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
663 payload_type,
664 8000, c->channels);
665 break;
666 case AV_CODEC_ID_ADPCM_G726: {
667 if (payload_type >= RTP_PT_PRIVATE)
668 av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
669 payload_type,
670 c->bits_per_coded_sample*8,
671 c->sample_rate);
672 break;
673 }
674 case AV_CODEC_ID_ILBC:
675 av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
676 "a=fmtp:%d mode=%d\r\n",
677 payload_type, c->sample_rate,
678 payload_type, c->block_align == 38 ? 20 : 30);
679 break;
680 case AV_CODEC_ID_SPEEX:
681 av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
682 payload_type, c->sample_rate);
683 if (c->codec) {
684 const char *mode;
685 uint64_t vad_option;
686
687 if (c->flags & CODEC_FLAG_QSCALE)
688 mode = "on";
689 else if (!av_opt_get_int(c, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option)
690 mode = "vad";
691 else
692 mode = "off";
693
694 av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n",
695 payload_type, mode);
696 }
697 break;
698 case AV_CODEC_ID_OPUS:
699 /* The opus RTP draft says that all opus streams MUST be declared
700 as stereo, to avoid negotiation failures. The actual number of
701 channels can change on a packet-by-packet basis. The number of
702 channels a receiver prefers to receive or a sender plans to send
703 can be declared via fmtp parameters (both default to mono), but
704 receivers MUST be able to receive and process stereo packets. */
705 av_strlcatf(buff, size, "a=rtpmap:%d opus/48000/2\r\n",
706 payload_type);
707 if (c->channels == 2) {
708 av_strlcatf(buff, size, "a=fmtp:%d sprop-stereo:1\r\n",
709 payload_type);
710 }
711 break;
712 default:
713 /* Nothing special to do here... */
714 break;
715 }
716
717 av_free(config);
718
719 return buff;
720}
721
722void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
723 const char *dest_addr, const char *dest_type,
724 int port, int ttl, AVFormatContext *fmt)
725{
726 AVCodecContext *c = st->codec;
727 const char *type;
728 int payload_type;
729
730 payload_type = ff_rtp_get_payload_type(fmt, c, idx);
731
732 switch (c->codec_type) {
733 case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
734 case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
735 case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
736 default : type = "application"; break;
737 }
738
739 av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
740 sdp_write_address(buff, size, dest_addr, dest_type, ttl);
741 if (c->bit_rate) {
742 av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000);
743 }
744
745 sdp_write_media_attributes(buff, size, c, payload_type, fmt);
746}
747
748int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
749{
750 AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
751 struct sdp_session_level s = { 0 };
752 int i, j, port, ttl, is_multicast, index = 0;
753 char dst[32], dst_type[5];
754
755 memset(buf, 0, size);
756 s.user = "-";
757 s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
758 s.src_type = "IP4";
759 s.name = title ? title->value : "No Name";
760
761 port = 0;
762 ttl = 0;
763 if (n_files == 1) {
764 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename);
765 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
766 sizeof(dst_type));
767 if (!is_multicast)
768 ttl = 0;
769 if (dst[0]) {
770 s.dst_addr = dst;
771 s.dst_type = dst_type;
772 s.ttl = ttl;
773 if (!strcmp(dst_type, "IP6")) {
774 s.src_addr = "::1";
775 s.src_type = "IP6";
776 }
777 }
778 }
779 sdp_write_header(buf, size, &s);
780
781 dst[0] = 0;
782 for (i = 0; i < n_files; i++) {
783 if (n_files != 1) {
784 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename);
785 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
786 sizeof(dst_type));
787 if (!is_multicast)
788 ttl = 0;
789 }
790 for (j = 0; j < ac[i]->nb_streams; j++) {
791 ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
792 dst[0] ? dst : NULL, dst_type,
793 (port > 0) ? port + j * 2 : 0,
794 ttl, ac[i]);
795 if (port <= 0) {
796 av_strlcatf(buf, size,
797 "a=control:streamid=%d\r\n", i + j);
798 }
799 if (ac[i]->pb && ac[i]->pb->av_class) {
800 uint8_t *crypto_suite = NULL, *crypto_params = NULL;
801 av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN,
802 &crypto_suite);
803 av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
804 &crypto_params);
805 if (crypto_suite && crypto_suite[0])
806 av_strlcatf(buf, size,
807 "a=crypto:1 %s inline:%s\r\n",
808 crypto_suite, crypto_params);
809 av_free(crypto_suite);
810 av_free(crypto_params);
811 }
812 }
813 }
814
815 return 0;
816}
817#else
818int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
819{
820 return AVERROR(ENOSYS);
821}
822
823void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
824 const char *dest_addr, const char *dest_type,
825 int port, int ttl, AVFormatContext *fmt)
826{
827}
828#endif