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
41 struct 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
sdp_write_address(char * buff,int size,const char * dest_addr,const char * dest_type,int ttl)58 static 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
sdp_write_header(char * buff,int size,struct sdp_session_level * s)74 static 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
resolve_destination(char * dest_addr,int size,char * type,int type_size)89 static 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
resolve_destination(char * dest_addr,int size,char * type,int type_size)115 static int resolve_destination(char *dest_addr, int size, char *type,
116 int type_size)
117 {
118 return 0;
119 }
120 #endif
121
sdp_get_address(char * dest_addr,int size,int * ttl,const char * url)122 static 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
extradata2psets(AVFormatContext * s,AVCodecParameters * par)154 static char *extradata2psets(AVFormatContext *s, AVCodecParameters *par)
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 = par->extradata;
161 int extradata_size = par->extradata_size;
162 uint8_t *tmpbuf = NULL;
163 const uint8_t *sps = NULL, *sps_end;
164
165 if (par->extradata_size > MAX_EXTRADATA_SIZE) {
166 av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
167
168 return NULL;
169 }
170 if (par->extradata[0] == 1) {
171 if (ff_avc_write_annexb_extradata(par->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(s, 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(s, 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 && p - psets <= MAX_PSET_SIZE - strlen(profile_string) - 7) {
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
extradata2psets_hevc(AVCodecParameters * par)226 static char *extradata2psets_hevc(AVCodecParameters *par)
227 {
228 char *psets;
229 uint8_t *extradata = par->extradata;
230 int extradata_size = par->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 (par->extradata[0] != 1) {
242 AVIOContext *pb;
243 if (avio_open_dyn_buf(&pb) < 0)
244 return NULL;
245 if (ff_isom_write_hvcc(pb, par->extradata, par->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 H.264 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
322 err:
323 av_free(tmpbuf);
324 return NULL;
325 }
326
extradata2config(AVFormatContext * s,AVCodecParameters * par)327 static char *extradata2config(AVFormatContext *s, AVCodecParameters *par)
328 {
329 char *config;
330
331 if (par->extradata_size > MAX_EXTRADATA_SIZE) {
332 av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
333
334 return NULL;
335 }
336 config = av_malloc(10 + par->extradata_size * 2);
337 if (!config) {
338 av_log(s, 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, par->extradata, par->extradata_size, 0);
343 config[9 + par->extradata_size * 2] = 0;
344
345 return config;
346 }
347
xiph_extradata2config(AVFormatContext * s,AVCodecParameters * par)348 static char *xiph_extradata2config(AVFormatContext *s, AVCodecParameters *par)
349 {
350 uint8_t *config;
351 char *encoded_config;
352 const uint8_t *header_start[3];
353 int headers_len, header_len[3], config_len;
354 int first_header_size;
355
356 switch (par->codec_id) {
357 case AV_CODEC_ID_THEORA:
358 first_header_size = 42;
359 break;
360 case AV_CODEC_ID_VORBIS:
361 first_header_size = 30;
362 break;
363 default:
364 av_log(s, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
365 return NULL;
366 }
367
368 if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
369 first_header_size, header_start,
370 header_len) < 0) {
371 av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
372 return NULL;
373 }
374
375 headers_len = header_len[0] + header_len[2];
376 config_len = 4 + // count
377 3 + // ident
378 2 + // packet size
379 1 + // header count
380 2 + // header size
381 headers_len; // and the rest
382
383 config = av_malloc(config_len);
384 if (!config)
385 goto xiph_fail;
386
387 encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
388 if (!encoded_config) {
389 av_free(config);
390 goto xiph_fail;
391 }
392
393 config[0] = config[1] = config[2] = 0;
394 config[3] = 1;
395 config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
396 config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
397 config[6] = (RTP_XIPH_IDENT ) & 0xff;
398 config[7] = (headers_len >> 8) & 0xff;
399 config[8] = headers_len & 0xff;
400 config[9] = 2;
401 config[10] = header_len[0];
402 config[11] = 0; // size of comment header; nonexistent
403 memcpy(config + 12, header_start[0], header_len[0]);
404 memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
405
406 av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
407 config, config_len);
408 av_free(config);
409
410 return encoded_config;
411
412 xiph_fail:
413 av_log(s, AV_LOG_ERROR,
414 "Not enough memory for configuration string\n");
415 return NULL;
416 }
417
latm_context2profilelevel(AVCodecParameters * par)418 static int latm_context2profilelevel(AVCodecParameters *par)
419 {
420 /* MP4A-LATM
421 * The RTP payload format specification is described in RFC 3016
422 * The encoding specifications are provided in ISO/IEC 14496-3 */
423
424 int profile_level = 0x2B;
425
426 /* TODO: AAC Profile only supports AAC LC Object Type.
427 * Different Object Types should implement different Profile Levels */
428
429 if (par->sample_rate <= 24000) {
430 if (par->channels <= 2)
431 profile_level = 0x28; // AAC Profile, Level 1
432 } else if (par->sample_rate <= 48000) {
433 if (par->channels <= 2) {
434 profile_level = 0x29; // AAC Profile, Level 2
435 } else if (par->channels <= 5) {
436 profile_level = 0x2A; // AAC Profile, Level 4
437 }
438 } else if (par->sample_rate <= 96000) {
439 if (par->channels <= 5) {
440 profile_level = 0x2B; // AAC Profile, Level 5
441 }
442 }
443
444 return profile_level;
445 }
446
latm_context2config(AVFormatContext * s,AVCodecParameters * par)447 static char *latm_context2config(AVFormatContext *s, AVCodecParameters *par)
448 {
449 /* MP4A-LATM
450 * The RTP payload format specification is described in RFC 3016
451 * The encoding specifications are provided in ISO/IEC 14496-3 */
452
453 uint8_t config_byte[6];
454 int rate_index;
455 char *config;
456
457 for (rate_index = 0; rate_index < 16; rate_index++)
458 if (avpriv_mpeg4audio_sample_rates[rate_index] == par->sample_rate)
459 break;
460 if (rate_index == 16) {
461 av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
462 return NULL;
463 }
464
465 config_byte[0] = 0x40;
466 config_byte[1] = 0;
467 config_byte[2] = 0x20 | rate_index;
468 config_byte[3] = par->channels << 4;
469 config_byte[4] = 0x3f;
470 config_byte[5] = 0xc0;
471
472 config = av_malloc(6*2+1);
473 if (!config) {
474 av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
475 return NULL;
476 }
477 ff_data_to_hex(config, config_byte, 6, 1);
478 config[12] = 0;
479
480 return config;
481 }
482
sdp_write_media_attributes(char * buff,int size,AVStream * st,int payload_type,AVFormatContext * fmt)483 static char *sdp_write_media_attributes(char *buff, int size, AVStream *st, int payload_type, AVFormatContext *fmt)
484 {
485 char *config = NULL;
486 AVCodecParameters *p = st->codecpar;
487
488 switch (p->codec_id) {
489 case AV_CODEC_ID_DIRAC:
490 av_strlcatf(buff, size, "a=rtpmap:%d VC2/90000\r\n", payload_type);
491 break;
492 case AV_CODEC_ID_H264: {
493 int mode = 1;
494 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
495 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
496 mode = 0;
497 if (p->extradata_size) {
498 config = extradata2psets(fmt, p);
499 }
500 av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
501 "a=fmtp:%d packetization-mode=%d%s\r\n",
502 payload_type,
503 payload_type, mode, config ? config : "");
504 break;
505 }
506 case AV_CODEC_ID_H261:
507 {
508 const char *pic_fmt = NULL;
509 /* only QCIF and CIF are specified as supported in RFC 4587 */
510 if (p->width == 176 && p->height == 144)
511 pic_fmt = "QCIF=1";
512 else if (p->width == 352 && p->height == 288)
513 pic_fmt = "CIF=1";
514 if (payload_type >= RTP_PT_PRIVATE)
515 av_strlcatf(buff, size, "a=rtpmap:%d H261/90000\r\n", payload_type);
516 if (pic_fmt)
517 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n", payload_type, pic_fmt);
518 break;
519 }
520 case AV_CODEC_ID_H263:
521 case AV_CODEC_ID_H263P:
522 /* a=framesize is required by 3GPP TS 26.234 (PSS). It
523 * actually specifies the maximum video size, but we only know
524 * the current size. This is required for playback on Android
525 * stagefright and on Samsung bada. */
526 if (!fmt || !fmt->oformat->priv_class ||
527 !av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
528 p->codec_id == AV_CODEC_ID_H263P)
529 av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
530 "a=framesize:%d %d-%d\r\n",
531 payload_type,
532 payload_type, p->width, p->height);
533 break;
534 case AV_CODEC_ID_HEVC:
535 if (p->extradata_size)
536 config = extradata2psets_hevc(p);
537 av_strlcatf(buff, size, "a=rtpmap:%d H265/90000\r\n", payload_type);
538 if (config)
539 av_strlcatf(buff, size, "a=fmtp:%d %s\r\n",
540 payload_type, config);
541 break;
542 case AV_CODEC_ID_MPEG4:
543 if (p->extradata_size) {
544 config = extradata2config(fmt, p);
545 }
546 av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
547 "a=fmtp:%d profile-level-id=1%s\r\n",
548 payload_type,
549 payload_type, config ? config : "");
550 break;
551 case AV_CODEC_ID_AAC:
552 if (fmt && fmt->oformat && fmt->oformat->priv_class &&
553 av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
554 config = latm_context2config(fmt, p);
555 if (!config)
556 return NULL;
557 av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
558 "a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
559 payload_type, p->sample_rate, p->channels,
560 payload_type, latm_context2profilelevel(p), config);
561 } else {
562 if (p->extradata_size) {
563 config = extradata2config(fmt, p);
564 } else {
565 /* FIXME: maybe we can forge config information based on the
566 * codec parameters...
567 */
568 av_log(fmt, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
569 return NULL;
570 }
571 if (!config) {
572 return NULL;
573 }
574 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
575 "a=fmtp:%d profile-level-id=1;"
576 "mode=AAC-hbr;sizelength=13;indexlength=3;"
577 "indexdeltalength=3%s\r\n",
578 payload_type, p->sample_rate, p->channels,
579 payload_type, config);
580 }
581 break;
582 case AV_CODEC_ID_PCM_S16BE:
583 if (payload_type >= RTP_PT_PRIVATE)
584 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
585 payload_type,
586 p->sample_rate, p->channels);
587 break;
588 case AV_CODEC_ID_PCM_S24BE:
589 if (payload_type >= RTP_PT_PRIVATE)
590 av_strlcatf(buff, size, "a=rtpmap:%d L24/%d/%d\r\n",
591 payload_type,
592 p->sample_rate, p->channels);
593 break;
594 case AV_CODEC_ID_PCM_MULAW:
595 if (payload_type >= RTP_PT_PRIVATE)
596 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
597 payload_type,
598 p->sample_rate, p->channels);
599 break;
600 case AV_CODEC_ID_PCM_ALAW:
601 if (payload_type >= RTP_PT_PRIVATE)
602 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
603 payload_type,
604 p->sample_rate, p->channels);
605 break;
606 case AV_CODEC_ID_AMR_NB:
607 av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
608 "a=fmtp:%d octet-align=1\r\n",
609 payload_type, p->sample_rate, p->channels,
610 payload_type);
611 break;
612 case AV_CODEC_ID_AMR_WB:
613 av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
614 "a=fmtp:%d octet-align=1\r\n",
615 payload_type, p->sample_rate, p->channels,
616 payload_type);
617 break;
618 case AV_CODEC_ID_VORBIS:
619 if (p->extradata_size)
620 config = xiph_extradata2config(fmt, p);
621 else
622 av_log(fmt, AV_LOG_ERROR, "Vorbis configuration info missing\n");
623 if (!config)
624 return NULL;
625
626 av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
627 "a=fmtp:%d configuration=%s\r\n",
628 payload_type, p->sample_rate, p->channels,
629 payload_type, config);
630 break;
631 case AV_CODEC_ID_THEORA: {
632 const char *pix_fmt;
633 switch (p->format) {
634 case AV_PIX_FMT_YUV420P:
635 pix_fmt = "YCbCr-4:2:0";
636 break;
637 case AV_PIX_FMT_YUV422P:
638 pix_fmt = "YCbCr-4:2:2";
639 break;
640 case AV_PIX_FMT_YUV444P:
641 pix_fmt = "YCbCr-4:4:4";
642 break;
643 default:
644 av_log(fmt, AV_LOG_ERROR, "Unsupported pixel format.\n");
645 return NULL;
646 }
647
648 if (p->extradata_size)
649 config = xiph_extradata2config(fmt, p);
650 else
651 av_log(fmt, AV_LOG_ERROR, "Theora configuration info missing\n");
652 if (!config)
653 return NULL;
654
655 av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
656 "a=fmtp:%d delivery-method=inline; "
657 "width=%d; height=%d; sampling=%s; "
658 "configuration=%s\r\n",
659 payload_type, payload_type,
660 p->width, p->height, pix_fmt, config);
661 break;
662 }
663 case AV_CODEC_ID_VP8:
664 av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
665 payload_type);
666 break;
667 case AV_CODEC_ID_VP9:
668 av_strlcatf(buff, size, "a=rtpmap:%d VP9/90000\r\n",
669 payload_type);
670 break;
671 case AV_CODEC_ID_MJPEG:
672 if (payload_type >= RTP_PT_PRIVATE)
673 av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
674 payload_type);
675 break;
676 case AV_CODEC_ID_ADPCM_G722:
677 if (payload_type >= RTP_PT_PRIVATE)
678 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
679 payload_type,
680 8000, p->channels);
681 break;
682 case AV_CODEC_ID_ADPCM_G726: {
683 if (payload_type >= RTP_PT_PRIVATE)
684 av_strlcatf(buff, size, "a=rtpmap:%d AAL2-G726-%d/%d\r\n",
685 payload_type,
686 p->bits_per_coded_sample*8,
687 p->sample_rate);
688 break;
689 }
690 case AV_CODEC_ID_ADPCM_G726LE: {
691 if (payload_type >= RTP_PT_PRIVATE)
692 av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
693 payload_type,
694 p->bits_per_coded_sample*8,
695 p->sample_rate);
696 break;
697 }
698 case AV_CODEC_ID_ILBC:
699 av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
700 "a=fmtp:%d mode=%d\r\n",
701 payload_type, p->sample_rate,
702 payload_type, p->block_align == 38 ? 20 : 30);
703 break;
704 case AV_CODEC_ID_SPEEX:
705 av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
706 payload_type, p->sample_rate);
707 #if FF_API_LAVF_AVCTX
708 FF_DISABLE_DEPRECATION_WARNINGS
709 if (st->codec) {
710 const char *mode;
711 uint64_t vad_option;
712
713 if (st->codec->flags & AV_CODEC_FLAG_QSCALE)
714 mode = "on";
715 else if (!av_opt_get_int(st->codec, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option)
716 mode = "vad";
717 else
718 mode = "off";
719
720 av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n",
721 payload_type, mode);
722 }
723 FF_ENABLE_DEPRECATION_WARNINGS
724 #endif
725 break;
726 case AV_CODEC_ID_OPUS:
727 /* The opus RTP draft says that all opus streams MUST be declared
728 as stereo, to avoid negotiation failures. The actual number of
729 channels can change on a packet-by-packet basis. The number of
730 channels a receiver prefers to receive or a sender plans to send
731 can be declared via fmtp parameters (both default to mono), but
732 receivers MUST be able to receive and process stereo packets. */
733 av_strlcatf(buff, size, "a=rtpmap:%d opus/48000/2\r\n",
734 payload_type);
735 if (p->channels == 2) {
736 av_strlcatf(buff, size, "a=fmtp:%d sprop-stereo=1\r\n",
737 payload_type);
738 }
739 break;
740 default:
741 /* Nothing special to do here... */
742 break;
743 }
744
745 av_free(config);
746
747 return buff;
748 }
749
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)750 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
751 const char *dest_addr, const char *dest_type,
752 int port, int ttl, AVFormatContext *fmt)
753 {
754 AVCodecParameters *p = st->codecpar;
755 const char *type;
756 int payload_type;
757
758 payload_type = ff_rtp_get_payload_type(fmt, st->codecpar, idx);
759
760 switch (p->codec_type) {
761 case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
762 case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
763 case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
764 default : type = "application"; break;
765 }
766
767 av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
768 sdp_write_address(buff, size, dest_addr, dest_type, ttl);
769 if (p->bit_rate) {
770 av_strlcatf(buff, size, "b=AS:%"PRId64"\r\n", p->bit_rate / 1000);
771 }
772
773 sdp_write_media_attributes(buff, size, st, payload_type, fmt);
774 }
775
av_sdp_create(AVFormatContext * ac[],int n_files,char * buf,int size)776 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
777 {
778 AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
779 struct sdp_session_level s = { 0 };
780 int i, j, port, ttl, is_multicast, index = 0;
781 char dst[32], dst_type[5];
782
783 memset(buf, 0, size);
784 s.user = "-";
785 s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
786 s.src_type = "IP4";
787 s.name = title ? title->value : "No Name";
788
789 port = 0;
790 ttl = 0;
791 if (n_files == 1) {
792 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->url ? ac[0]->url : "");
793 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
794 sizeof(dst_type));
795 if (!is_multicast)
796 ttl = 0;
797 if (dst[0]) {
798 s.dst_addr = dst;
799 s.dst_type = dst_type;
800 s.ttl = ttl;
801 if (!strcmp(dst_type, "IP6")) {
802 s.src_addr = "::1";
803 s.src_type = "IP6";
804 }
805 }
806 }
807 sdp_write_header(buf, size, &s);
808
809 dst[0] = 0;
810 for (i = 0; i < n_files; i++) {
811 if (n_files != 1) {
812 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->url ? ac[i]->url : "");
813 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
814 sizeof(dst_type));
815 if (!is_multicast)
816 ttl = 0;
817 }
818 for (j = 0; j < ac[i]->nb_streams; j++) {
819 ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
820 dst[0] ? dst : NULL, dst_type,
821 (port > 0) ? port + j * 2 : 0,
822 ttl, ac[i]);
823 if (port <= 0) {
824 av_strlcatf(buf, size,
825 "a=control:streamid=%d\r\n", i + j);
826 }
827 if (ac[i]->pb && ac[i]->pb->av_class) {
828 uint8_t *crypto_suite = NULL, *crypto_params = NULL;
829 av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN,
830 &crypto_suite);
831 av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
832 &crypto_params);
833 if (crypto_suite && crypto_suite[0])
834 av_strlcatf(buf, size,
835 "a=crypto:1 %s inline:%s\r\n",
836 crypto_suite, crypto_params);
837 av_free(crypto_suite);
838 av_free(crypto_params);
839 }
840 }
841 }
842
843 return 0;
844 }
845 #else
av_sdp_create(AVFormatContext * ac[],int n_files,char * buf,int size)846 int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
847 {
848 return AVERROR(ENOSYS);
849 }
850
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)851 void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
852 const char *dest_addr, const char *dest_type,
853 int port, int ttl, AVFormatContext *fmt)
854 {
855 }
856 #endif
857