avoptions: Add an av_opt_flag_is_set function for inspecting flag fields
[libav.git] / libavformat / sdp.c
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1/*
2 * copyright (c) 2007 Luca Abeni
3 *
2912e87a 4 * This file is part of Libav.
c5388c07 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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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 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 17 * License along with Libav; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
c47b0738 21#include <string.h>
245976da
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22#include "libavutil/avstring.h"
23#include "libavutil/base64.h"
d2d67e42 24#include "libavutil/dict.h"
ab0287fc 25#include "libavutil/parseutils.h"
91af5601 26#include "libavcodec/xiph.h"
c5388c07 27#include "avformat.h"
f1c80e35 28#include "internal.h"
29e35d67 29#include "avc.h"
759d98d0 30#include "rtp.h"
51a269cd
MS
31#if CONFIG_NETWORK
32#include "network.h"
33#endif
c5388c07 34
b250f9c6 35#if CONFIG_RTP_MUXER
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36#define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
37
38struct sdp_session_level {
39 int sdp_version; /**< protocol version (currently 0) */
7be75dd7 40 int id; /**< session ID */
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41 int version; /**< session version */
42 int start_time; /**< session start time (NTP time, in seconds),
7be75dd7 43 or 0 in case of permanent session */
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44 int end_time; /**< session end time (NTP time, in seconds),
45 or 0 if the session is not bounded */
46 int ttl; /**< TTL, in case of multicast stream */
47 const char *user; /**< username of the session's creator */
48 const char *src_addr; /**< IP address of the machine from which the session was created */
7ad1dc54 49 const char *src_type; /**< address type of src_addr */
c5388c07 50 const char *dst_addr; /**< destination IP address (can be multicast) */
7ad1dc54 51 const char *dst_type; /**< destination IP address type */
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52 const char *name; /**< session name (can be an empty string) */
53};
54
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MS
55static void sdp_write_address(char *buff, int size, const char *dest_addr,
56 const char *dest_type, int ttl)
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57{
58 if (dest_addr) {
7ad1dc54
MS
59 if (!dest_type)
60 dest_type = "IP4";
6898677e
MS
61 if (ttl > 0 && !strcmp(dest_type, "IP4")) {
62 /* The TTL should only be specified for IPv4 multicast addresses,
63 * not for IPv6. */
7ad1dc54 64 av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
c5388c07 65 } else {
7ad1dc54 66 av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
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67 }
68 }
69}
70
71static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
72{
73 av_strlcatf(buff, size, "v=%d\r\n"
7ad1dc54 74 "o=- %d %d IN %s %s\r\n"
56e6f830 75 "s=%s\r\n",
c5388c07 76 s->sdp_version,
7ad1dc54 77 s->id, s->version, s->src_type, s->src_addr,
f3650b23 78 s->name);
7ad1dc54 79 sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
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LA
80 av_strlcatf(buff, size, "t=%d %d\r\n"
81 "a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
82 s->start_time, s->end_time);
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83}
84
51a269cd 85#if CONFIG_NETWORK
10105c9b 86static int resolve_destination(char *dest_addr, int size, char *type,
87b2b40a 87 int type_size)
51a269cd 88{
7ad526d2 89 struct addrinfo hints, *ai;
10105c9b 90 int is_multicast;
51a269cd 91
7ad1dc54 92 av_strlcpy(type, "IP4", type_size);
51a269cd 93 if (!dest_addr[0])
10105c9b 94 return 0;
51a269cd
MS
95
96 /* Resolve the destination, since it must be written
97 * as a numeric IP address in the SDP. */
98
99 memset(&hints, 0, sizeof(hints));
51a269cd 100 if (getaddrinfo(dest_addr, NULL, &hints, &ai))
10105c9b 101 return 0;
5a8693ef
MS
102 getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
103 NULL, 0, NI_NUMERICHOST);
095e5c0b 104#ifdef AF_INET6
5a8693ef
MS
105 if (ai->ai_family == AF_INET6)
106 av_strlcpy(type, "IP6", type_size);
095e5c0b 107#endif
10105c9b 108 is_multicast = ff_is_multicast_address(ai->ai_addr);
51a269cd 109 freeaddrinfo(ai);
10105c9b 110 return is_multicast;
51a269cd
MS
111}
112#else
10105c9b 113static int resolve_destination(char *dest_addr, int size, char *type,
87b2b40a 114 int type_size)
51a269cd 115{
10105c9b 116 return 0;
51a269cd
MS
117}
118#endif
119
91cd7eb6 120static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
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121{
122 int port;
123 const char *p;
c47b0738 124 char proto[32];
c5388c07 125
f3bfe388 126 av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
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127
128 *ttl = 0;
c47b0738
MS
129
130 if (strcmp(proto, "rtp")) {
131 /* The url isn't for the actual rtp sessions,
132 * don't parse out anything else than the destination.
133 */
134 return 0;
135 }
136
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LA
137 p = strchr(url, '?');
138 if (p) {
139 char buff[64];
c5388c07 140
ab0287fc 141 if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
87b2b40a
MS
142 *ttl = strtol(buff, NULL, 10);
143 } else {
144 *ttl = 5;
145 }
c5388c07
LA
146 }
147
148 return port;
149}
150
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151#define MAX_PSET_SIZE 1024
152static char *extradata2psets(AVCodecContext *c)
153{
154 char *psets, *p;
a1fc4d4a 155 const uint8_t *r;
29e35d67
LA
156 const char *pset_string = "; sprop-parameter-sets=";
157
158 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
7be75dd7 159 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
29e35d67
LA
160
161 return NULL;
162 }
ede13f55
LA
163 if (c->extradata[0] == 1) {
164 uint8_t *dummy_p;
165 int dummy_int;
166 AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb");
167
168 if (!bsfc) {
169 av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
170
171 return NULL;
172 }
173 av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0);
174 av_bitstream_filter_close(bsfc);
175 }
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LA
176
177 psets = av_mallocz(MAX_PSET_SIZE);
178 if (psets == NULL) {
7be75dd7 179 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
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LA
180 return NULL;
181 }
182 memcpy(psets, pset_string, strlen(pset_string));
183 p = psets + strlen(pset_string);
184 r = ff_avc_find_startcode(c->extradata, c->extradata + c->extradata_size);
185 while (r < c->extradata + c->extradata_size) {
a1fc4d4a 186 const uint8_t *r1;
99f373f3 187 uint8_t nal_type;
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LA
188
189 while (!*(r++));
99f373f3 190 nal_type = *r & 0x1f;
29e35d67 191 r1 = ff_avc_find_startcode(r, c->extradata + c->extradata_size);
99f373f3
MS
192 if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
193 r = r1;
194 continue;
195 }
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LA
196 if (p != (psets + strlen(pset_string))) {
197 *p = ',';
198 p++;
199 }
200 if (av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r) == NULL) {
7be75dd7 201 av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %td %td!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
29e35d67
LA
202 av_free(psets);
203
204 return NULL;
205 }
206 p += strlen(p);
207 r = r1;
208 }
209
210 return psets;
211}
212
81ab1fa1 213static char *extradata2config(AVCodecContext *c)
4901263a
LA
214{
215 char *config;
216
81ab1fa1 217 if (c->extradata_size > MAX_EXTRADATA_SIZE) {
7be75dd7 218 av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
4901263a
LA
219
220 return NULL;
221 }
81ab1fa1 222 config = av_malloc(10 + c->extradata_size * 2);
4901263a 223 if (config == NULL) {
7be75dd7 224 av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
4901263a
LA
225 return NULL;
226 }
227 memcpy(config, "; config=", 9);
ddbeb954 228 ff_data_to_hex(config + 9, c->extradata, c->extradata_size, 0);
81ab1fa1 229 config[9 + c->extradata_size * 2] = 0;
4901263a
LA
230
231 return config;
232}
233
91af5601
JA
234static char *xiph_extradata2config(AVCodecContext *c)
235{
236 char *config, *encoded_config;
237 uint8_t *header_start[3];
238 int headers_len, header_len[3], config_len;
239 int first_header_size;
240
241 switch (c->codec_id) {
242 case CODEC_ID_THEORA:
243 first_header_size = 42;
244 break;
245 case CODEC_ID_VORBIS:
246 first_header_size = 30;
247 break;
248 default:
249 av_log(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
250 return NULL;
251 }
252
253 if (ff_split_xiph_headers(c->extradata, c->extradata_size,
254 first_header_size, header_start,
255 header_len) < 0) {
256 av_log(c, AV_LOG_ERROR, "Extradata corrupt.\n");
257 return NULL;
258 }
259
260 headers_len = header_len[0] + header_len[2];
261 config_len = 4 + // count
262 3 + // ident
263 2 + // packet size
264 1 + // header count
265 2 + // header size
266 headers_len; // and the rest
267
268 config = av_malloc(config_len);
269 if (!config)
270 goto xiph_fail;
271
272 encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
273 if (!encoded_config) {
274 av_free(config);
275 goto xiph_fail;
276 }
277
278 config[0] = config[1] = config[2] = 0;
279 config[3] = 1;
b5c4bb98
MS
280 config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
281 config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
282 config[6] = (RTP_XIPH_IDENT ) & 0xff;
91af5601
JA
283 config[7] = (headers_len >> 8) & 0xff;
284 config[8] = headers_len & 0xff;
285 config[9] = 2;
286 config[10] = header_len[0];
287 config[11] = 0; // size of comment header; nonexistent
288 memcpy(config + 12, header_start[0], header_len[0]);
289 memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
290
291 av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
292 config, config_len);
293 av_free(config);
294
295 return encoded_config;
296
297xiph_fail:
298 av_log(c, AV_LOG_ERROR,
299 "Not enough memory for configuration string\n");
300 return NULL;
301}
302
0558e266 303static char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type, AVFormatContext *fmt)
c5388c07
LA
304{
305 char *config = NULL;
306
307 switch (c->codec_id) {
b21cd0bc 308 case CODEC_ID_H264:
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LA
309 if (c->extradata_size) {
310 config = extradata2psets(c);
311 }
b21cd0bc
LA
312 av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
313 "a=fmtp:%d packetization-mode=1%s\r\n",
314 payload_type,
315 payload_type, config ? config : "");
316 break;
9edfaf3c
MS
317 case CODEC_ID_H263:
318 case CODEC_ID_H263P:
9b14ec5f
MS
319 /* a=framesize is required by 3GPP TS 26.234 (PSS). It
320 * actually specifies the maximum video size, but we only know
321 * the current size. This is required for playback on Android
322 * stagefright and on Samsung bada. */
323 av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
324 "a=framesize:%d %d-%d\r\n",
325 payload_type,
326 payload_type, c->width, c->height);
9edfaf3c 327 break;
c5388c07 328 case CODEC_ID_MPEG4:
21b37480 329 if (c->extradata_size) {
81ab1fa1 330 config = extradata2config(c);
c5388c07
LA
331 }
332 av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
333 "a=fmtp:%d profile-level-id=1%s\r\n",
334 payload_type,
335 payload_type, config ? config : "");
336 break;
4901263a 337 case CODEC_ID_AAC:
21b37480 338 if (c->extradata_size) {
81ab1fa1 339 config = extradata2config(c);
4901263a
LA
340 } else {
341 /* FIXME: maybe we can forge config information based on the
342 * codec parameters...
343 */
7be75dd7 344 av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
4901263a
LA
345 return NULL;
346 }
347 if (config == NULL) {
348 return NULL;
349 }
350 av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
351 "a=fmtp:%d profile-level-id=1;"
352 "mode=AAC-hbr;sizelength=13;indexlength=3;"
353 "indexdeltalength=3%s\r\n",
354 payload_type, c->sample_rate, c->channels,
355 payload_type, config);
356 break;
c9215bab 357 case CODEC_ID_PCM_S16BE:
f877954f 358 if (payload_type >= RTP_PT_PRIVATE)
c9215bab
LA
359 av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
360 payload_type,
361 c->sample_rate, c->channels);
362 break;
363 case CODEC_ID_PCM_MULAW:
f877954f 364 if (payload_type >= RTP_PT_PRIVATE)
c9215bab
LA
365 av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
366 payload_type,
367 c->sample_rate, c->channels);
368 break;
369 case CODEC_ID_PCM_ALAW:
f877954f 370 if (payload_type >= RTP_PT_PRIVATE)
c9215bab
LA
371 av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
372 payload_type,
373 c->sample_rate, c->channels);
374 break;
08e696c0
MS
375 case CODEC_ID_AMR_NB:
376 av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
377 "a=fmtp:%d octet-align=1\r\n",
378 payload_type, c->sample_rate, c->channels,
379 payload_type);
380 break;
381 case CODEC_ID_AMR_WB:
382 av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
383 "a=fmtp:%d octet-align=1\r\n",
384 payload_type, c->sample_rate, c->channels,
385 payload_type);
386 break;
91af5601
JA
387 case CODEC_ID_VORBIS:
388 if (c->extradata_size)
389 config = xiph_extradata2config(c);
390 else
391 av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n");
392 if (!config)
393 return NULL;
394
395 av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
396 "a=fmtp:%d configuration=%s\r\n",
397 payload_type, c->sample_rate, c->channels,
398 payload_type, config);
399 break;
400 case CODEC_ID_THEORA: {
401 const char *pix_fmt;
402 if (c->extradata_size)
403 config = xiph_extradata2config(c);
404 else
405 av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n");
406 if (!config)
407 return NULL;
408
409 switch (c->pix_fmt) {
410 case PIX_FMT_YUV420P:
411 pix_fmt = "YCbCr-4:2:0";
412 break;
413 case PIX_FMT_YUV422P:
414 pix_fmt = "YCbCr-4:2:2";
415 break;
416 case PIX_FMT_YUV444P:
417 pix_fmt = "YCbCr-4:4:4";
418 break;
419 default:
420 av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n");
421 return NULL;
422 }
423
424 av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
425 "a=fmtp:%d delivery-method=inline; "
426 "width=%d; height=%d; sampling=%s; "
427 "configuration=%s\r\n",
428 payload_type, payload_type,
429 c->width, c->height, pix_fmt, config);
430 break;
431 }
7b18d94c
JA
432 case CODEC_ID_VP8:
433 av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
434 payload_type);
435 break;
0048a2a8
MS
436 case CODEC_ID_ADPCM_G722:
437 if (payload_type >= RTP_PT_PRIVATE)
438 av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
439 payload_type,
440 8000, c->channels);
441 break;
c5388c07 442 default:
7be75dd7 443 /* Nothing special to do here... */
c5388c07
LA
444 break;
445 }
446
447 av_free(config);
448
449 return buff;
450}
451
0558e266 452void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt)
c5388c07
LA
453{
454 const char *type;
455 int payload_type;
456
0550b58f 457 payload_type = ff_rtp_get_payload_type(c);
c5388c07 458 if (payload_type < 0) {
72415b2a 459 payload_type = RTP_PT_PRIVATE + (c->codec_type == AVMEDIA_TYPE_AUDIO);
c5388c07
LA
460 }
461
462 switch (c->codec_type) {
72415b2a
SS
463 case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
464 case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
465 case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
c5388c07
LA
466 default : type = "application"; break;
467 }
468
469 av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
7ad1dc54 470 sdp_write_address(buff, size, dest_addr, dest_type, ttl);
83cc23c5
LA
471 if (c->bit_rate) {
472 av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000);
473 }
c5388c07 474
0558e266 475 sdp_write_media_attributes(buff, size, c, payload_type, fmt);
c5388c07
LA
476}
477
c234d40b 478int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
c5388c07 479{
d2d67e42 480 AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
c5388c07 481 struct sdp_session_level s;
10105c9b 482 int i, j, port, ttl, is_multicast;
7ad1dc54 483 char dst[32], dst_type[5];
c5388c07 484
c234d40b 485 memset(buf, 0, size);
c5388c07
LA
486 memset(&s, 0, sizeof(struct sdp_session_level));
487 s.user = "-";
488 s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
7ad1dc54 489 s.src_type = "IP4";
f3650b23 490 s.name = title ? title->value : "No Name";
c5388c07
LA
491
492 port = 0;
493 ttl = 0;
494 if (n_files == 1) {
91cd7eb6 495 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->filename);
10105c9b
MS
496 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
497 sizeof(dst_type));
498 if (!is_multicast)
499 ttl = 0;
9ea7f03a 500 if (dst[0]) {
c5388c07 501 s.dst_addr = dst;
7ad1dc54 502 s.dst_type = dst_type;
c5388c07 503 s.ttl = ttl;
7ad1dc54
MS
504 if (!strcmp(dst_type, "IP6")) {
505 s.src_addr = "::1";
506 s.src_type = "IP6";
507 }
c5388c07
LA
508 }
509 }
c234d40b 510 sdp_write_header(buf, size, &s);
c5388c07
LA
511
512 dst[0] = 0;
513 for (i = 0; i < n_files; i++) {
514 if (n_files != 1) {
91cd7eb6 515 port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->filename);
10105c9b
MS
516 is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
517 sizeof(dst_type));
518 if (!is_multicast)
519 ttl = 0;
c5388c07
LA
520 }
521 for (j = 0; j < ac[i]->nb_streams; j++) {
c234d40b 522 ff_sdp_write_media(buf, size,
c5388c07 523 ac[i]->streams[j]->codec, dst[0] ? dst : NULL,
0558e266
MS
524 dst_type, (port > 0) ? port + j * 2 : 0, ttl,
525 ac[i]);
c5388c07 526 if (port <= 0) {
c234d40b 527 av_strlcatf(buf, size,
c5388c07
LA
528 "a=control:streamid=%d\r\n", i + j);
529 }
530 }
531 }
532
8767b80f 533 return 0;
c5388c07 534}
7ba32703 535#else
c234d40b 536int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
7ba32703 537{
8767b80f 538 return AVERROR(ENOSYS);
7ba32703 539}
0341b699 540
0558e266 541void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl, AVFormatContext *fmt)
0341b699
MS
542{
543}
7ba32703 544#endif
c3675dfe
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545
546#if FF_API_SDP_CREATE
547int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size)
548{
549 return av_sdp_create(ac, n_files, buff, size);
550}
551#endif