Convert ff_is_multicast_address to take a struct sockaddr parameter
[libav.git] / libavformat / sdp.c
CommitLineData
c5388c07
LA
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
c47b0738 21#include <string.h>
245976da
DB
22#include "libavutil/avstring.h"
23#include "libavutil/base64.h"
91af5601 24#include "libavcodec/xiph.h"
c5388c07 25#include "avformat.h"
f1c80e35 26#include "internal.h"
29e35d67 27#include "avc.h"
759d98d0 28#include "rtp.h"
51a269cd
MS
29#if CONFIG_NETWORK
30#include "network.h"
31#endif
c5388c07 32
b250f9c6 33#if CONFIG_RTP_MUXER
c5388c07
LA
34#define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
35
36struct sdp_session_level {
37 int sdp_version; /**< protocol version (currently 0) */
7be75dd7 38 int id; /**< session ID */
c5388c07
LA
39 int version; /**< session version */
40 int start_time; /**< session start time (NTP time, in seconds),
7be75dd7 41 or 0 in case of permanent session */
c5388c07
LA
42 int end_time; /**< session end time (NTP time, in seconds),
43 or 0 if the session is not bounded */
44 int ttl; /**< TTL, in case of multicast stream */
45 const char *user; /**< username of the session's creator */
46 const char *src_addr; /**< IP address of the machine from which the session was created */
7ad1dc54 47 const char *src_type; /**< address type of src_addr */
c5388c07 48 const char *dst_addr; /**< destination IP address (can be multicast) */
7ad1dc54 49 const char *dst_type; /**< destination IP address type */
c5388c07
LA
50 const char *name; /**< session name (can be an empty string) */
51};
52
7ad1dc54
MS
53static void sdp_write_address(char *buff, int size, const char *dest_addr,
54 const char *dest_type, int ttl)
c5388c07
LA
55{
56 if (dest_addr) {
7ad1dc54
MS
57 if (!dest_type)
58 dest_type = "IP4";
c5388c07 59 if (ttl > 0) {
7ad1dc54 60 av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
c5388c07 61 } else {
7ad1dc54 62 av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
c5388c07
LA
63 }
64 }
65}
66
67static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
68{
69 av_strlcatf(buff, size, "v=%d\r\n"
7ad1dc54 70 "o=- %d %d IN %s %s\r\n"
56e6f830 71 "s=%s\r\n",
c5388c07 72 s->sdp_version,
7ad1dc54 73 s->id, s->version, s->src_type, s->src_addr,
f3650b23 74 s->name);
7ad1dc54 75 sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
56e6f830
LA
76 av_strlcatf(buff, size, "t=%d %d\r\n"
77 "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
78 s->start_time, s->end_time);
c5388c07
LA
79}
80
51a269cd 81#if CONFIG_NETWORK
7ad1dc54
MS
82static void resolve_destination(char *dest_addr, int size, char *type,
83 int type_size)
51a269cd 84{
7ad526d2 85 struct addrinfo hints, *ai;
51a269cd 86
7ad1dc54 87 av_strlcpy(type, "IP4", type_size);
51a269cd
MS
88 if (!dest_addr[0])
89 return;
90
91 /* Resolve the destination, since it must be written
92 * as a numeric IP address in the SDP. */
93
94 memset(&hints, 0, sizeof(hints));
51a269cd
MS
95 if (getaddrinfo(dest_addr, NULL, &hints, &ai))
96 return;
5a8693ef
MS
97 getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
98 NULL, 0, NI_NUMERICHOST);
99 if (ai->ai_family == AF_INET6)
100 av_strlcpy(type, "IP6", type_size);
51a269cd
MS
101 freeaddrinfo(ai);
102}
103#else
1272ae7e
MS
104static void resolve_destination(char *dest_addr, int size, char *type,
105 int type_size)
51a269cd
MS
106{
107}
108#endif
109
91cd7eb6 110static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
c5388c07
LA
111{
112 int port;
113 const char *p;
c47b0738 114 char proto[32];
c5388c07 115
f3bfe388 116 av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
c5388c07
LA
117
118 *ttl = 0;
c47b0738
MS
119
120 if (strcmp(proto, "rtp")) {
121 /* The url isn't for the actual rtp sessions,
122 * don't parse out anything else than the destination.
123 */
124 return 0;
125 }
126
c5388c07
LA
127 p = strchr(url, '?');
128 if (p) {
129 char buff[64];
130 int is_multicast = find_info_tag(buff, sizeof(buff), "multicast", p);
131
132 if (is_multicast) {
133 if (find_info_tag(buff, sizeof(buff), "ttl", p)) {
134 *ttl = strtol(buff, NULL, 10);
135 } else {
136 *ttl = 5;
137 }
138 }
139 }
140
141 return port;
142}
143
29e35d67
LA
144#define MAX_PSET_SIZE 1024
145static char *extradata2psets(AVCodecContext *c)
146{
147 char *psets, *p;
a1fc4d4a 148 const uint8_t *r;
29e35d67
LA
149 const char *pset_string = "; sprop-parameter-sets=";
150
151 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
7be75dd7 152 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
29e35d67
LA
153
154 return NULL;
155 }
ede13f55
LA
156 if (c->extradata[0] == 1) {
157 uint8_t *dummy_p;
158 int dummy_int;
159 AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb");
160
161 if (!bsfc) {
162 av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
163
164 return NULL;
165 }
166 av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0);
167 av_bitstream_filter_close(bsfc);
168 }
29e35d67
LA
169
170 psets = av_mallocz(MAX_PSET_SIZE);
171 if (psets == NULL) {
7be75dd7 172 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
29e35d67
LA
173 return NULL;
174 }
175 memcpy(psets, pset_string, strlen(pset_string));
176 p = psets + strlen(pset_string);
177 r = ff_avc_find_startcode(c->extradata, c->extradata + c->extradata_size);
178 while (r < c->extradata + c->extradata_size) {
a1fc4d4a 179 const uint8_t *r1;
99f373f3 180 uint8_t nal_type;
29e35d67
LA
181
182 while (!*(r++));
99f373f3 183 nal_type = *r & 0x1f;
29e35d67 184 r1 = ff_avc_find_startcode(r, c->extradata + c->extradata_size);
99f373f3
MS
185 if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
186 r = r1;
187 continue;
188 }
29e35d67
LA
189 if (p != (psets + strlen(pset_string))) {
190 *p = ',';
191 p++;
192 }
193 if (av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r) == NULL) {
7be75dd7 194 av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %td %td!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
29e35d67
LA
195 av_free(psets);
196
197 return NULL;
198 }
199 p += strlen(p);
200 r = r1;
201 }
202
203 return psets;
204}
205
81ab1fa1 206static char *extradata2config(AVCodecContext *c)
4901263a
LA
207{
208 char *config;
209
81ab1fa1 210 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
7be75dd7 211 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
4901263a
LA
212
213 return NULL;
214 }
81ab1fa1 215 config = av_malloc(10 + c->extradata_size * 2);
4901263a 216 if (config == NULL) {
7be75dd7 217 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
4901263a
LA
218 return NULL;
219 }
220 memcpy(config, "; config=", 9);
ddbeb954 221 ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0);
81ab1fa1 222 config[9 + c->extradata_size * 2] = 0;
4901263a
LA
223
224 return config;
225}
226
91af5601
JA
227static char *xiph_extradata2config(AVCodecContext *c)
228{
229 char *config, *encoded_config;
230 uint8_t *header_start[3];
231 int headers_len, header_len[3], config_len;
232 int first_header_size;
233
234 switch (c->codec_id) {
235 case CODEC_ID_THEORA:
236 first_header_size = 42;
237 break;
238 case CODEC_ID_VORBIS:
239 first_header_size = 30;
240 break;
241 default:
242 av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
243 return NULL;
244 }
245
246 if (ff_split_xiph_headers(c->extradata, c->extradata_size,
247 first_header_size, header_start,
248 header_len) < 0) {
249 av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n");
250 return NULL;
251 }
252
253 headers_len = header_len[0] + header_len[2];
254 config_len = 4 + // count
255 3 + // ident
256 2 + // packet size
257 1 + // header count
258 2 + // header size
259 headers_len; // and the rest
260
261 config = av_malloc(config_len);
262 if (!config)
263 goto xiph_fail;
264
265 encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
266 if (!encoded_config) {
267 av_free(config);
268 goto xiph_fail;
269 }
270
271 config[0] = config[1] = config[2] = 0;
272 config[3] = 1;
b5c4bb98
MS
273 config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
274 config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
275 config[6] = (RTP_XIPH_IDENT ) & 0xff;
91af5601
JA
276 config[7] = (headers_len >> 8) & 0xff;
277 config[8] = headers_len & 0xff;
278 config[9] = 2;
279 config[10] = header_len[0];
280 config[11] = 0; // size of comment header; nonexistent
281 memcpy(config + 12, header_start[0], header_len[0]);
282 memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
283
284 av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
285 config, config_len);
286 av_free(config);
287
288 return encoded_config;
289
290xiph_fail:
291 av_log(c, AV_LOG_ERROR,
292 "Not enough memory for configuration string\n");
293 return NULL;
294}
295
91cd7eb6 296static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type)
c5388c07
LA
297{
298 char *config = NULL;
299
300 switch (c->codec_id) {
b21cd0bc 301 case CODEC_ID_H264:
29e35d67
LA
302 if (c->extradata_size) {
303 config = extradata2psets(c);
304 }
b21cd0bc
LA
305 av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
306 "a=fmtp:%d packetization-mode=1%s\r\n",
307 payload_type,
308 payload_type, config ? config : "");
309 break;
9edfaf3c
MS
310 case CODEC_ID_H263:
311 case CODEC_ID_H263P:
312 av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n", payload_type);
313 break;
c5388c07 314 case CODEC_ID_MPEG4:
21b37480 315 if (c->extradata_size) {
81ab1fa1 316 config = extradata2config(c);
c5388c07
LA
317 }
318 av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
319 "a=fmtp:%d profile-level-id=1%s\r\n",
320 payload_type,
321 payload_type, config ? config : "");
322 break;
4901263a 323 case CODEC_ID_AAC:
21b37480 324 if (c->extradata_size) {
81ab1fa1 325 config = extradata2config(c);
4901263a
LA
326 } else {
327 /* FIXME: maybe we can forge config information based on the
328 * codec parameters...
329 */
7be75dd7 330 av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
4901263a
LA
331 return NULL;
332 }
333 if (config == NULL) {
334 return NULL;
335 }
336 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
337 "a=fmtp:%d profile-level-id=1;"
338 "mode=AAC-hbr;sizelength=13;indexlength=3;"
339 "indexdeltalength=3%s\r\n",
340 payload_type, c->sample_rate, c->channels,
341 payload_type, config);
342 break;
c9215bab 343 case CODEC_ID_PCM_S16BE:
f877954f 344 if (payload_type >= RTP_PT_PRIVATE)
c9215bab
LA
345 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
346 payload_type,
347 c->sample_rate, c->channels);
348 break;
349 case CODEC_ID_PCM_MULAW:
f877954f 350 if (payload_type >= RTP_PT_PRIVATE)
c9215bab
LA
351 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
352 payload_type,
353 c->sample_rate, c->channels);
354 break;
355 case CODEC_ID_PCM_ALAW:
f877954f 356 if (payload_type >= RTP_PT_PRIVATE)
c9215bab
LA
357 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
358 payload_type,
359 c->sample_rate, c->channels);
360 break;
08e696c0
MS
361 case CODEC_ID_AMR_NB:
362 av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
363 "a=fmtp:%d octet-align=1\r\n",
364 payload_type, c->sample_rate, c->channels,
365 payload_type);
366 break;
367 case CODEC_ID_AMR_WB:
368 av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
369 "a=fmtp:%d octet-align=1\r\n",
370 payload_type, c->sample_rate, c->channels,
371 payload_type);
372 break;
91af5601
JA
373 case CODEC_ID_VORBIS:
374 if (c->extradata_size)
375 config = xiph_extradata2config(c);
376 else
377 av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n");
378 if (!config)
379 return NULL;
380
381 av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
382 "a=fmtp:%d configuration=%s\r\n",
383 payload_type, c->sample_rate, c->channels,
384 payload_type, config);
385 break;
386 case CODEC_ID_THEORA: {
387 const char *pix_fmt;
388 if (c->extradata_size)
389 config = xiph_extradata2config(c);
390 else
391 av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n");
392 if (!config)
393 return NULL;
394
395 switch (c->pix_fmt) {
396 case PIX_FMT_YUV420P:
397 pix_fmt = "YCbCr-4:2:0";
398 break;
399 case PIX_FMT_YUV422P:
400 pix_fmt = "YCbCr-4:2:2";
401 break;
402 case PIX_FMT_YUV444P:
403 pix_fmt = "YCbCr-4:4:4";
404 break;
405 default:
406 av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n");
407 return NULL;
408 }
409
410 av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
411 "a=fmtp:%d delivery-method=inline; "
412 "width=%d; height=%d; sampling=%s; "
413 "configuration=%s\r\n",
414 payload_type, payload_type,
415 c->width, c->height, pix_fmt, config);
416 break;
417 }
7b18d94c
JA
418 case CODEC_ID_VP8:
419 av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
420 payload_type);
421 break;
0048a2a8
MS
422 case CODEC_ID_ADPCM_G722:
423 if (payload_type >= RTP_PT_PRIVATE)
424 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
425 payload_type,
426 8000, c->channels);
427 break;
c5388c07 428 default:
7be75dd7 429 /* Nothing special to do here... */
c5388c07
LA
430 break;
431 }
432
433 av_free(config);
434
435 return buff;
436}
437
7ad1dc54 438void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl)
c5388c07
LA
439{
440 const char *type;
441 int payload_type;
442
0550b58f 443 payload_type = ff_rtp_get_payload_type(c);
c5388c07 444 if (payload_type < 0) {
72415b2a 445 payload_type = RTP_PT_PRIVATE + (c->codec_type == AVMEDIA_TYPE_AUDIO);
c5388c07
LA
446 }
447
448 switch (c->codec_type) {
72415b2a
SS
449 case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
450 case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
451 case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
c5388c07
LA
452 default : type = "application"; break;
453 }
454
455 av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
7ad1dc54 456 sdp_write_address(buff, size, dest_addr, dest_type, ttl);
83cc23c5
LA
457 if (c->bit_rate) {
458 av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000);
459 }
c5388c07 460
91cd7eb6 461 sdp_write_media_attributes(buff, size, c, payload_type);
c5388c07
LA
462}
463
8767b80f 464int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size)
c5388c07 465{
f3650b23 466 AVMetadataTag *title = av_metadata_get(ac[0]->metadata, "title", NULL, 0);
c5388c07
LA
467 struct sdp_session_level s;
468 int i, j, port, ttl;
7ad1dc54 469 char dst[32], dst_type[5];
c5388c07 470
5f2cbb53 471 memset(buff, 0, size);
c5388c07
LA
472 memset(&s, 0, sizeof(struct sdp_session_level));
473 s.user = "-";
474 s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
7ad1dc54 475 s.src_type = "IP4";
f3650b23 476 s.name = title ? title->value : "No Name";
c5388c07
LA
477
478 port = 0;
479 ttl = 0;
480 if (n_files == 1) {
91cd7eb6 481 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename);
7ad1dc54 482 resolve_destination(dst, sizeof(dst), dst_type, sizeof(dst_type));
9ea7f03a 483 if (dst[0]) {
c5388c07 484 s.dst_addr = dst;
7ad1dc54 485 s.dst_type = dst_type;
c5388c07 486 s.ttl = ttl;
7ad1dc54
MS
487 if (!strcmp(dst_type, "IP6")) {
488 s.src_addr = "::1";
489 s.src_type = "IP6";
490 }
c5388c07
LA
491 }
492 }
8767b80f 493 sdp_write_header(buff, size, &s);
c5388c07
LA
494
495 dst[0] = 0;
496 for (i = 0; i < n_files; i++) {
497 if (n_files != 1) {
91cd7eb6 498 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename);
7ad1dc54 499 resolve_destination(dst, sizeof(dst), dst_type, sizeof(dst_type));
c5388c07
LA
500 }
501 for (j = 0; j < ac[i]->nb_streams; j++) {
0341b699 502 ff_sdp_write_media(buff, size,
c5388c07 503 ac[i]->streams[j]->codec, dst[0] ? dst : NULL,
cc83027c 504 dst_type, (port > 0) ? port + j * 2 : 0, ttl);
c5388c07 505 if (port <= 0) {
8767b80f 506 av_strlcatf(buff, size,
c5388c07
LA
507 "a=control:streamid=%d\r\n", i + j);
508 }
509 }
510 }
511
8767b80f 512 return 0;
c5388c07 513}
7ba32703 514#else
8767b80f 515int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size)
7ba32703 516{
8767b80f 517 return AVERROR(ENOSYS);
7ba32703 518}
0341b699 519
f06d6c75 520void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl)
0341b699
MS
521{
522}
7ba32703 523#endif