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 "config_components.h"
22
23 #include <string.h>
24 #include "libavutil/avstring.h"
25 #include "libavutil/base64.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/parseutils.h"
28 #include "libavutil/opt.h"
29 #include "libavcodec/xiph.h"
30 #include "libavcodec/mpeg4audio.h"
31 #include "avformat.h"
32 #include "internal.h"
33 #include "avc.h"
34 #include "hevc.h"
35 #include "rtp.h"
36 #if CONFIG_NETWORK
37 #include "network.h"
38 #endif
39
40 #if CONFIG_RTP_MUXER
41 #define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
42
43 struct sdp_session_level {
44 int sdp_version; /**< protocol version (currently 0) */
45 int id; /**< session ID */
46 int version; /**< session version */
47 int start_time; /**< session start time (NTP time, in seconds),
48 or 0 in case of permanent session */
49 int end_time; /**< session end time (NTP time, in seconds),
50 or 0 if the session is not bounded */
51 int ttl; /**< TTL, in case of multicast stream */
52 const char *user; /**< username of the session's creator */
53 const char *src_addr; /**< IP address of the machine from which the session was created */
54 const char *src_type; /**< address type of src_addr */
55 const char *dst_addr; /**< destination IP address (can be multicast) */
56 const char *dst_type; /**< destination IP address type */
57 const char *name; /**< session name (can be an empty string) */
58 };
59
sdp_write_address(char * buff,int size,const char * dest_addr,const char * dest_type,int ttl)60 static void sdp_write_address(char *buff, int size, const char *dest_addr,
61 const char *dest_type, int ttl)
62 {
63 if (dest_addr) {
64 if (!dest_type)
65 dest_type = "IP4";
66 if (ttl > 0 && !strcmp(dest_type, "IP4")) {
67 /* The TTL should only be specified for IPv4 multicast addresses,
68 * not for IPv6. */
69 av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
70 } else {
71 av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
72 }
73 }
74 }
75
sdp_write_header(char * buff,int size,struct sdp_session_level * s)76 static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
77 {
78 av_strlcatf(buff, size, "v=%d\r\n"
79 "o=- %d %d IN %s %s\r\n"
80 "s=%s\r\n",
81 s->sdp_version,
82 s->id, s->version, s->src_type, s->src_addr,
83 s->name);
84 sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
85 av_strlcatf(buff, size, "t=%d %d\r\n"
86 "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
87 s->start_time, s->end_time);
88 }
89
90 #if CONFIG_NETWORK
resolve_destination(char * dest_addr,int size,char * type,int type_size)91 static int resolve_destination(char *dest_addr, int size, char *type,
92 int type_size)
93 {
94 struct addrinfo hints = { 0 }, *ai;
95 int is_multicast;
96
97 av_strlcpy(type, "IP4", type_size);
98 if (!dest_addr[0])
99 return 0;
100
101 /* Resolve the destination, since it must be written
102 * as a numeric IP address in the SDP. */
103
104 if (getaddrinfo(dest_addr, NULL, &hints, &ai))
105 return 0;
106 getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
107 NULL, 0, NI_NUMERICHOST);
108 #ifdef AF_INET6
109 if (ai->ai_family == AF_INET6)
110 av_strlcpy(type, "IP6", type_size);
111 #endif
112 is_multicast = ff_is_multicast_address(ai->ai_addr);
113 freeaddrinfo(ai);
114 return is_multicast;
115 }
116 #else
resolve_destination(char * dest_addr,int size,char * type,int type_size)117 static int resolve_destination(char *dest_addr, int size, char *type,
118 int type_size)
119 {
120 return 0;
121 }
122 #endif
123
sdp_get_address(char * dest_addr,int size,int * ttl,const char * url)124 static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
125 {
126 int port;
127 const char *p;
128 char proto[32];
129
130 av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
131
132 *ttl = 0;
133
134 if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) {
135 /* The url isn't for the actual rtp sessions,
136 * don't parse out anything else than the destination.
137 */
138 return 0;
139 }
140
141 p = strchr(url, '?');
142 if (p) {
143 char buff[64];
144
145 if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
146 *ttl = strtol(buff, NULL, 10);
147 } else {
148 *ttl = 5;
149 }
150 }
151
152 return port;
153 }
154
155 #define MAX_PSET_SIZE 1024
extradata2psets(AVFormatContext * s,const AVCodecParameters * par,char ** out)156 static int extradata2psets(AVFormatContext *s, const AVCodecParameters *par,
157 char **out)
158 {
159 char *psets, *p;
160 const uint8_t *r;
161 static const char pset_string[] = "; sprop-parameter-sets=";
162 static const char profile_string[] = "; profile-level-id=";
163 uint8_t *extradata = par->extradata;
164 int extradata_size = par->extradata_size;
165 uint8_t *tmpbuf = NULL;
166 const uint8_t *sps = NULL, *sps_end;
167
168 *out = NULL;
169
170 if (par->extradata_size > MAX_EXTRADATA_SIZE) {
171 av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
172 return AVERROR_INVALIDDATA;
173 }
174 if (par->extradata[0] == 1) {
175 int ret = ff_avc_write_annexb_extradata(par->extradata, &extradata,
176 &extradata_size);
177 if (ret < 0)
178 return ret;
179
180 tmpbuf = extradata;
181 }
182
183 psets = av_mallocz(MAX_PSET_SIZE);
184 if (!psets) {
185 av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
186 av_free(tmpbuf);
187 return AVERROR(ENOMEM);
188 }
189 memcpy(psets, pset_string, strlen(pset_string));
190 p = psets + strlen(pset_string);
191 r = ff_avc_find_startcode(extradata, extradata + extradata_size);
192 while (r < extradata + extradata_size) {
193 const uint8_t *r1;
194 uint8_t nal_type;
195
196 while (!*(r++));
197 nal_type = *r & 0x1f;
198 r1 = ff_avc_find_startcode(r, extradata + extradata_size);
199 if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
200 r = r1;
201 continue;
202 }
203 if (p != (psets + strlen(pset_string))) {
204 *p = ',';
205 p++;
206 }
207 if (!sps) {
208 sps = r;
209 sps_end = r1;
210 }
211 if (!av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r)) {
212 av_log(s, AV_LOG_ERROR, "Cannot Base64-encode %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"!\n",
213 MAX_PSET_SIZE - (p - psets), r1 - r);
214 av_free(psets);
215 av_free(tmpbuf);
216
217 return AVERROR_INVALIDDATA;
218 }
219 p += strlen(p);
220 r = r1;
221 }
222 if (sps && sps_end - sps >= 4 && p - psets <= MAX_PSET_SIZE - strlen(profile_string) - 7) {
223 memcpy(p, profile_string, strlen(profile_string));
224 p += strlen(p);
225 ff_data_to_hex(p, sps + 1, 3, 0);
226 }
227 av_free(tmpbuf);
228
229 *out = psets;
230 return 0;
231 }
232
extradata2psets_hevc(const AVCodecParameters * par,char ** out)233 static int extradata2psets_hevc(const AVCodecParameters *par, char **out)
234 {
235 char *psets;
236 uint8_t *extradata = par->extradata;
237 int extradata_size = par->extradata_size;
238 uint8_t *tmpbuf = NULL;
239 int ps_pos[3] = { 0 };
240 static const char * const ps_names[3] = { "vps", "sps", "pps" };
241 int num_arrays, num_nalus;
242 int pos, i, j, ret = 0;
243
244 *out = NULL;
245
246 // Convert to hvcc format. Since we need to group multiple NALUs of
247 // the same type, and we might need to convert from one format to the
248 // other anyway, we get away with a little less work by using the hvcc
249 // format.
250 if (par->extradata[0] != 1) {
251 AVIOContext *pb;
252
253 ret = avio_open_dyn_buf(&pb);
254 if (ret < 0)
255 return ret;
256
257 ret = ff_isom_write_hvcc(pb, par->extradata, par->extradata_size, 0);
258 if (ret < 0) {
259 avio_close_dyn_buf(pb, &tmpbuf);
260 goto err;
261 }
262 extradata_size = avio_close_dyn_buf(pb, &extradata);
263 tmpbuf = extradata;
264 }
265
266 if (extradata_size < 23)
267 goto err;
268
269 num_arrays = extradata[22];
270 pos = 23;
271 for (i = 0; i < num_arrays; i++) {
272 int num_nalus, nalu_type;
273 if (pos + 3 > extradata_size)
274 goto err;
275 nalu_type = extradata[pos] & 0x3f;
276 // Not including libavcodec/hevc.h to avoid confusion between
277 // NAL_* with the same name for both H.264 and HEVC.
278 if (nalu_type == 32) // VPS
279 ps_pos[0] = pos;
280 else if (nalu_type == 33) // SPS
281 ps_pos[1] = pos;
282 else if (nalu_type == 34) // PPS
283 ps_pos[2] = pos;
284 num_nalus = AV_RB16(&extradata[pos + 1]);
285 pos += 3;
286 for (j = 0; j < num_nalus; j++) {
287 int len;
288 if (pos + 2 > extradata_size)
289 goto err;
290 len = AV_RB16(&extradata[pos]);
291 pos += 2;
292 if (pos + len > extradata_size)
293 goto err;
294 pos += len;
295 }
296 }
297 if (!ps_pos[0] || !ps_pos[1] || !ps_pos[2])
298 goto err;
299
300 psets = av_mallocz(MAX_PSET_SIZE);
301 if (!psets) {
302 ret = AVERROR(ENOMEM);
303 goto err;
304 }
305
306 psets[0] = '\0';
307
308 for (i = 0; i < 3; i++) {
309 pos = ps_pos[i];
310
311 if (i > 0)
312 av_strlcat(psets, "; ", MAX_PSET_SIZE);
313 av_strlcatf(psets, MAX_PSET_SIZE, "sprop-%s=", ps_names[i]);
314
315 // Skipping boundary checks in the input here; we've already traversed
316 // the whole hvcc structure above without issues
317 num_nalus = AV_RB16(&extradata[pos + 1]);
318 pos += 3;
319 for (j = 0; j < num_nalus; j++) {
320 int len = AV_RB16(&extradata[pos]);
321 int strpos;
322 pos += 2;
323 if (j > 0)
324 av_strlcat(psets, ",", MAX_PSET_SIZE);
325 strpos = strlen(psets);
326 if (!av_base64_encode(psets + strpos, MAX_PSET_SIZE - strpos,
327 &extradata[pos], len)) {
328 av_free(psets);
329 goto err;
330 }
331 pos += len;
332 }
333 }
334 av_free(tmpbuf);
335
336 *out = psets;
337 return 0;
338 err:
339 if (ret >= 0)
340 ret = AVERROR_INVALIDDATA;
341 av_free(tmpbuf);
342 return ret;
343 }
344
extradata2config(AVFormatContext * s,const AVCodecParameters * par,char ** out)345 static int extradata2config(AVFormatContext *s, const AVCodecParameters *par,
346 char **out)
347 {
348 char *config;
349
350 *out = NULL;
351
352 if (par->extradata_size > MAX_EXTRADATA_SIZE) {
353 av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
354 return AVERROR_INVALIDDATA;
355 }
356 config = av_malloc(10 + par->extradata_size * 2);
357 if (!config) {
358 av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
359 return AVERROR(ENOMEM);
360 }
361 memcpy(config, "; config=", 9);
362 ff_data_to_hex(config + 9, par->extradata, par->extradata_size, 0);
363
364 *out = config;
365 return 0;
366 }
367
xiph_extradata2config(AVFormatContext * s,const AVCodecParameters * par,char ** out)368 static int xiph_extradata2config(AVFormatContext *s, const AVCodecParameters *par,
369 char **out)
370 {
371 uint8_t *config;
372 char *encoded_config;
373 const uint8_t *header_start[3];
374 int headers_len, header_len[3], config_len;
375 int first_header_size, ret;
376
377 *out = NULL;
378
379 switch (par->codec_id) {
380 case AV_CODEC_ID_THEORA:
381 first_header_size = 42;
382 break;
383 case AV_CODEC_ID_VORBIS:
384 first_header_size = 30;
385 break;
386 default:
387 av_log(s, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
388 return AVERROR(ENOSYS);
389 }
390
391 ret = avpriv_split_xiph_headers(par->extradata, par->extradata_size,
392 first_header_size, header_start,
393 header_len);
394 if (ret < 0) {
395 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
396 return ret;
397 }
398
399 headers_len = header_len[0] + header_len[2];
400 config_len = 4 + // count
401 3 + // ident
402 2 + // packet size
403 1 + // header count
404 2 + // header size
405 headers_len; // and the rest
406
407 config = av_malloc(config_len);
408 if (!config)
409 goto xiph_fail;
410
411 encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
412 if (!encoded_config) {
413 av_free(config);
414 goto xiph_fail;
415 }
416
417 config[0] = config[1] = config[2] = 0;
418 config[3] = 1;
419 config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
420 config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
421 config[6] = (RTP_XIPH_IDENT ) & 0xff;
422 config[7] = (headers_len >> 8) & 0xff;
423 config[8] = headers_len & 0xff;
424 config[9] = 2;
425 config[10] = header_len[0];
426 config[11] = 0; // size of comment header; nonexistent
427 memcpy(config + 12, header_start[0], header_len[0]);
428 memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
429
430 av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
431 config, config_len);
432 av_free(config);
433
434 *out = encoded_config;
435 return 0;
436
437 xiph_fail:
438 av_log(s, AV_LOG_ERROR,
439 "Not enough memory for configuration string\n");
440 return AVERROR(ENOMEM);
441 }
442
latm_context2profilelevel(const AVCodecParameters * par)443 static int latm_context2profilelevel(const AVCodecParameters *par)
444 {
445 /* MP4A-LATM
446 * The RTP payload format specification is described in RFC 3016
447 * The encoding specifications are provided in ISO/IEC 14496-3 */
448
449 int profile_level = 0x2B;
450
451 /* TODO: AAC Profile only supports AAC LC Object Type.
452 * Different Object Types should implement different Profile Levels */
453
454 if (par->sample_rate <= 24000) {
455 if (par->ch_layout.nb_channels <= 2)
456 profile_level = 0x28; // AAC Profile, Level 1
457 } else if (par->sample_rate <= 48000) {
458 if (par->ch_layout.nb_channels <= 2) {
459 profile_level = 0x29; // AAC Profile, Level 2
460 } else if (par->ch_layout.nb_channels <= 5) {
461 profile_level = 0x2A; // AAC Profile, Level 4
462 }
463 } else if (par->sample_rate <= 96000) {
464 if (par->ch_layout.nb_channels <= 5) {
465 profile_level = 0x2B; // AAC Profile, Level 5
466 }
467 }
468
469 return profile_level;
470 }
471
latm_context2config(AVFormatContext * s,const AVCodecParameters * par,char ** out)472 static int latm_context2config(AVFormatContext *s, const AVCodecParameters *par,
473 char **out)
474 {
475 /* MP4A-LATM
476 * The RTP payload format specification is described in RFC 3016
477 * The encoding specifications are provided in ISO/IEC 14496-3 */
478
479 uint8_t config_byte[6];
480 int rate_index;
481 char *config;
482
483 *out = NULL;
484
485 for (rate_index = 0; rate_index < 16; rate_index++)
486 if (ff_mpeg4audio_sample_rates[rate_index] == par->sample_rate)
487 break;
488 if (rate_index == 16) {
489 av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
490 return AVERROR(ENOSYS);
491 }
492
493 config_byte[0] = 0x40;
494 config_byte[1] = 0;
495 config_byte[2] = 0x20 | rate_index;
496 config_byte[3] = par->ch_layout.nb_channels << 4;
497 config_byte[4] = 0x3f;
498 config_byte[5] = 0xc0;
499
500 config = av_malloc(6*2+1);
501 if (!config) {
502 av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
503 return AVERROR(ENOMEM);
504 }
505 ff_data_to_hex(config, config_byte, 6, 1);
506
507 *out = config;
508 return 0;
509 }
510
sdp_write_media_attributes(char * buff,int size,const AVStream * st,int payload_type,AVFormatContext * fmt)511 static int sdp_write_media_attributes(char *buff, int size, const AVStream *st,
512 int payload_type, AVFormatContext *fmt)
513 {
514 char *config = NULL;
515 const AVCodecParameters *p = st->codecpar;
516 int ret = 0;
517
518 switch (p->codec_id) {
519 case AV_CODEC_ID_DIRAC:
520 av_strlcatf(buff, size, "a=rtpmap:%d VC2/90000\r\n", payload_type);
521 break;
522 case AV_CODEC_ID_H264: {
523 int mode = 1;
524 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
525 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
526 mode = 0;
527 if (p->extradata_size) {
528 ret = extradata2psets(fmt, p, &config);
529 if (ret < 0)
530 return ret;
531 }
532 av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
533 "a=fmtp:%d packetization-mode=%d%s\r\n",
534 payload_type,
535 payload_type, mode, config ? config : "");
536 break;
537 }
538 case AV_CODEC_ID_H261:
539 {
540 const char *pic_fmt = NULL;
541 /* only QCIF and CIF are specified as supported in RFC 4587 */
542 if (p->width == 176 && p->height == 144)
543 pic_fmt = "QCIF=1";
544 else if (p->width == 352 && p->height == 288)
545 pic_fmt = "CIF=1";
546 if (payload_type >= RTP_PT_PRIVATE)
547 av_strlcatf(buff, size, "a=rtpmap:%d H261/90000\r\n", payload_type);
548 if (pic_fmt)
549 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n", payload_type, pic_fmt);
550 break;
551 }
552 case AV_CODEC_ID_H263:
553 case AV_CODEC_ID_H263P:
554 /* a=framesize is required by 3GPP TS 26.234 (PSS). It
555 * actually specifies the maximum video size, but we only know
556 * the current size. This is required for playback on Android
557 * stagefright and on Samsung bada. */
558 if (!fmt || !fmt->oformat->priv_class ||
559 !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
560 p->codec_id == AV_CODEC_ID_H263P)
561 av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
562 "a=framesize:%d %d-%d\r\n",
563 payload_type,
564 payload_type, p->width, p->height);
565 break;
566 case AV_CODEC_ID_HEVC:
567 if (p->extradata_size) {
568 ret = extradata2psets_hevc(p, &config);
569 if (ret < 0)
570 return ret;
571 }
572 av_strlcatf(buff, size, "a=rtpmap:%d H265/90000\r\n", payload_type);
573 if (config)
574 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n",
575 payload_type, config);
576 break;
577 case AV_CODEC_ID_MPEG4:
578 if (p->extradata_size) {
579 ret = extradata2config(fmt, p, &config);
580 if (ret < 0)
581 return ret;
582 }
583 av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
584 "a=fmtp:%d profile-level-id=1%s\r\n",
585 payload_type,
586 payload_type, config ? config : "");
587 break;
588 case AV_CODEC_ID_AAC:
589 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
590 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
591 ret = latm_context2config(fmt, p, &config);
592 if (ret < 0)
593 return ret;
594 av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
595 "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
596 payload_type, p->sample_rate, p->ch_layout.nb_channels,
597 payload_type, latm_context2profilelevel(p), config);
598 } else {
599 if (p->extradata_size) {
600 ret = extradata2config(fmt, p, &config);
601 if (ret < 0)
602 return ret;
603 } else {
604 /* FIXME: maybe we can forge config information based on the
605 * codec parameters...
606 */
607 av_log(fmt, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
608 return AVERROR(ENOSYS);
609 }
610 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
611 "a=fmtp:%d profile-level-id=1;"
612 "mode=AAC-hbr;sizelength=13;indexlength=3;"
613 "indexdeltalength=3%s\r\n",
614 payload_type, p->sample_rate, p->ch_layout.nb_channels,
615 payload_type, config);
616 }
617 break;
618 case AV_CODEC_ID_PCM_S16BE:
619 if (payload_type >= RTP_PT_PRIVATE)
620 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
621 payload_type,
622 p->sample_rate, p->ch_layout.nb_channels);
623 break;
624 case AV_CODEC_ID_PCM_S24BE:
625 if (payload_type >= RTP_PT_PRIVATE)
626 av_strlcatf(buff, size, "a=rtpmap:%d L24/%d/%d\r\n",
627 payload_type,
628 p->sample_rate, p->ch_layout.nb_channels);
629 break;
630 case AV_CODEC_ID_PCM_MULAW:
631 if (payload_type >= RTP_PT_PRIVATE)
632 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
633 payload_type,
634 p->sample_rate, p->ch_layout.nb_channels);
635 break;
636 case AV_CODEC_ID_PCM_ALAW:
637 if (payload_type >= RTP_PT_PRIVATE)
638 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
639 payload_type,
640 p->sample_rate, p->ch_layout.nb_channels);
641 break;
642 case AV_CODEC_ID_AMR_NB:
643 av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
644 "a=fmtp:%d octet-align=1\r\n",
645 payload_type, p->sample_rate, p->ch_layout.nb_channels,
646 payload_type);
647 break;
648 case AV_CODEC_ID_AMR_WB:
649 av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
650 "a=fmtp:%d octet-align=1\r\n",
651 payload_type, p->sample_rate, p->ch_layout.nb_channels,
652 payload_type);
653 break;
654 case AV_CODEC_ID_VORBIS:
655 if (p->extradata_size)
656 ret = xiph_extradata2config(fmt, p, &config);
657 else {
658 av_log(fmt, AV_LOG_ERROR, "Vorbis configuration info missing\n");
659 ret = AVERROR_INVALIDDATA;
660 }
661 if (ret < 0)
662 return ret;
663
664 av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
665 "a=fmtp:%d configuration=%s\r\n",
666 payload_type, p->sample_rate, p->ch_layout.nb_channels,
667 payload_type, config);
668 break;
669 case AV_CODEC_ID_THEORA: {
670 const char *pix_fmt;
671 switch (p->format) {
672 case AV_PIX_FMT_YUV420P:
673 pix_fmt = "YCbCr-4:2:0";
674 break;
675 case AV_PIX_FMT_YUV422P:
676 pix_fmt = "YCbCr-4:2:2";
677 break;
678 case AV_PIX_FMT_YUV444P:
679 pix_fmt = "YCbCr-4:4:4";
680 break;
681 default:
682 av_log(fmt, AV_LOG_ERROR, "Unsupported pixel format.\n");
683 return AVERROR(ENOSYS);
684 }
685
686 if (p->extradata_size)
687 ret = xiph_extradata2config(fmt, p, &config);
688 else {
689 av_log(fmt, AV_LOG_ERROR, "Theora configuration info missing\n");
690 ret = AVERROR_INVALIDDATA;
691 }
692 if (ret < 0)
693 return ret;
694
695 av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
696 "a=fmtp:%d delivery-method=inline; "
697 "width=%d; height=%d; sampling=%s; "
698 "configuration=%s\r\n",
699 payload_type, payload_type,
700 p->width, p->height, pix_fmt, config);
701 break;
702 }
703 case AV_CODEC_ID_BITPACKED:
704 case AV_CODEC_ID_RAWVIDEO: {
705 const char *pix_fmt;
706 int bit_depth = 8;
707
708 switch (p->format) {
709 case AV_PIX_FMT_UYVY422:
710 pix_fmt = "YCbCr-4:2:2";
711 break;
712 case AV_PIX_FMT_YUV422P10:
713 pix_fmt = "YCbCr-4:2:2";
714 bit_depth = 10;
715 break;
716 case AV_PIX_FMT_YUV420P:
717 pix_fmt = "YCbCr-4:2:0";
718 break;
719 case AV_PIX_FMT_RGB24:
720 pix_fmt = "RGB";
721 break;
722 case AV_PIX_FMT_BGR24:
723 pix_fmt = "BGR";
724 break;
725 default:
726 av_log(fmt, AV_LOG_ERROR, "Unsupported pixel format.\n");
727 return AVERROR(ENOSYS);
728 }
729
730 av_strlcatf(buff, size, "a=rtpmap:%d raw/90000\r\n"
731 "a=fmtp:%d sampling=%s; "
732 "width=%d; height=%d; "
733 "depth=%d",
734 payload_type, payload_type,
735 pix_fmt, p->width, p->height, bit_depth);
736 if (p->field_order != AV_FIELD_PROGRESSIVE)
737 av_strlcatf(buff, size, "; interlace");
738 av_strlcatf(buff, size, "\r\n");
739 break;
740 }
741
742 case AV_CODEC_ID_VP8:
743 av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
744 payload_type);
745 break;
746 case AV_CODEC_ID_VP9:
747 av_strlcatf(buff, size, "a=rtpmap:%d VP9/90000\r\n",
748 payload_type);
749 break;
750 case AV_CODEC_ID_MJPEG:
751 if (payload_type >= RTP_PT_PRIVATE)
752 av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
753 payload_type);
754 break;
755 case AV_CODEC_ID_ADPCM_G722:
756 if (payload_type >= RTP_PT_PRIVATE)
757 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
758 payload_type,
759 8000, p->ch_layout.nb_channels);
760 break;
761 case AV_CODEC_ID_ADPCM_G726: {
762 if (payload_type >= RTP_PT_PRIVATE)
763 av_strlcatf(buff, size, "a=rtpmap:%d AAL2-G726-%d/%d\r\n",
764 payload_type,
765 p->bits_per_coded_sample*8,
766 p->sample_rate);
767 break;
768 }
769 case AV_CODEC_ID_ADPCM_G726LE: {
770 if (payload_type >= RTP_PT_PRIVATE)
771 av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
772 payload_type,
773 p->bits_per_coded_sample*8,
774 p->sample_rate);
775 break;
776 }
777 case AV_CODEC_ID_ILBC:
778 av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
779 "a=fmtp:%d mode=%d\r\n",
780 payload_type, p->sample_rate,
781 payload_type, p->block_align == 38 ? 20 : 30);
782 break;
783 case AV_CODEC_ID_SPEEX:
784 av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
785 payload_type, p->sample_rate);
786 break;
787 case AV_CODEC_ID_OPUS:
788 /* The opus RTP draft says that all opus streams MUST be declared
789 as stereo, to avoid negotiation failures. The actual number of
790 channels can change on a packet-by-packet basis. The number of
791 channels a receiver prefers to receive or a sender plans to send
792 can be declared via fmtp parameters (both default to mono), but
793 receivers MUST be able to receive and process stereo packets. */
794 av_strlcatf(buff, size, "a=rtpmap:%d opus/48000/2\r\n",
795 payload_type);
796 if (p->ch_layout.nb_channels == 2) {
797 av_strlcatf(buff, size, "a=fmtp:%d sprop-stereo=1\r\n",
798 payload_type);
799 }
800 break;
801 default:
802 /* Nothing special to do here... */
803 break;
804 }
805
806 av_free(config);
807
808 return 0;
809 }
810
ff_sdp_write_media(char * buff,int size,const AVStream * st,int idx,const char * dest_addr,const char * dest_type,int port,int ttl,AVFormatContext * fmt)811 int ff_sdp_write_media(char *buff, int size, const AVStream *st, int idx,
812 const char *dest_addr, const char *dest_type,
813 int port, int ttl, AVFormatContext *fmt)
814 {
815 const AVCodecParameters *p = st->codecpar;
816 const char *type;
817 int payload_type;
818
819 payload_type = ff_rtp_get_payload_type(fmt, st->codecpar, idx);
820
821 switch (p->codec_type) {
822 case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
823 case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
824 case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
825 default : type = "application"; break;
826 }
827
828 av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
829 sdp_write_address(buff, size, dest_addr, dest_type, ttl);
830 if (p->bit_rate) {
831 av_strlcatf(buff, size, "b=AS:%"PRId64"\r\n", p->bit_rate / 1000);
832 }
833
834 return sdp_write_media_attributes(buff, size, st, payload_type, fmt);
835 }
836
av_sdp_create(AVFormatContext * ac[],int n_files,char * buf,int size)837 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
838 {
839 AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
840 struct sdp_session_level s = { 0 };
841 int i, j, port, ttl, is_multicast, index = 0;
842 char dst[32], dst_type[5];
843
844 memset(buf, 0, size);
845 s.user = "-";
846 s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
847 s.src_type = "IP4";
848 s.name = title ? title->value : "No Name";
849
850 port = 0;
851 ttl = 0;
852 if (n_files == 1) {
853 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->url ? ac[0]->url : "");
854 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
855 sizeof(dst_type));
856 if (!is_multicast)
857 ttl = 0;
858 if (dst[0]) {
859 s.dst_addr = dst;
860 s.dst_type = dst_type;
861 s.ttl = ttl;
862 if (!strcmp(dst_type, "IP6")) {
863 s.src_addr = "::1";
864 s.src_type = "IP6";
865 }
866 }
867 }
868 sdp_write_header(buf, size, &s);
869
870 dst[0] = 0;
871 for (i = 0; i < n_files; i++) {
872 if (n_files != 1) {
873 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->url ? ac[i]->url : "");
874 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
875 sizeof(dst_type));
876 if (!is_multicast)
877 ttl = 0;
878 }
879 for (j = 0; j < ac[i]->nb_streams; j++) {
880 int ret = ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
881 dst[0] ? dst : NULL, dst_type,
882 (port > 0) ? port + j * 2 : 0,
883 ttl, ac[i]);
884 if (ret < 0)
885 return ret;
886
887 if (port <= 0) {
888 av_strlcatf(buf, size,
889 "a=control:streamid=%d\r\n", i + j);
890 }
891 if (ac[i]->pb && ac[i]->pb->av_class) {
892 uint8_t *crypto_suite = NULL, *crypto_params = NULL;
893 av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN,
894 &crypto_suite);
895 av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
896 &crypto_params);
897 if (crypto_suite && crypto_suite[0])
898 av_strlcatf(buf, size,
899 "a=crypto:1 %s inline:%s\r\n",
900 crypto_suite, crypto_params);
901 av_free(crypto_suite);
902 av_free(crypto_params);
903 }
904 }
905 }
906
907 return 0;
908 }
909 #else
av_sdp_create(AVFormatContext * ac[],int n_files,char * buf,int size)910 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
911 {
912 return AVERROR(ENOSYS);
913 }
914
ff_sdp_write_media(char * buff,int size,const AVStream * st,int idx,const char * dest_addr,const char * dest_type,int port,int ttl,AVFormatContext * fmt)915 int ff_sdp_write_media(char *buff, int size, const AVStream *st, int idx,
916 const char *dest_addr, const char *dest_type,
917 int port, int ttl, AVFormatContext *fmt)
918 {
919 return AVERROR(ENOSYS);
920 }
921 #endif
922