Reassemble the RTSP URL before replacing hostname with the numerical IP
[libav.git] / libavformat / rtsp.c
1 /*
2 * RTSP/SDP client
3 * Copyright (c) 2002 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/base64.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/intreadwrite.h"
25 #include "avformat.h"
26
27 #include <sys/time.h>
28 #if HAVE_SYS_SELECT_H
29 #include <sys/select.h>
30 #endif
31 #include <strings.h>
32 #include "internal.h"
33 #include "network.h"
34 #include "os_support.h"
35 #include "rtsp.h"
36
37 #include "rtpdec.h"
38 #include "rdt.h"
39 #include "rtpdec_asf.h"
40 #include "rtpdec_vorbis.h"
41
42 //#define DEBUG
43 //#define DEBUG_RTP_TCP
44
45 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
46 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
47 #endif
48
49 #define SPACE_CHARS " \t\r\n"
50 /* we use memchr() instead of strchr() here because strchr() will return
51 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
52 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
53 static void skip_spaces(const char **pp)
54 {
55 const char *p;
56 p = *pp;
57 while (redir_isspace(*p))
58 p++;
59 *pp = p;
60 }
61
62 static void get_word_until_chars(char *buf, int buf_size,
63 const char *sep, const char **pp)
64 {
65 const char *p;
66 char *q;
67
68 p = *pp;
69 skip_spaces(&p);
70 q = buf;
71 while (!strchr(sep, *p) && *p != '\0') {
72 if ((q - buf) < buf_size - 1)
73 *q++ = *p;
74 p++;
75 }
76 if (buf_size > 0)
77 *q = '\0';
78 *pp = p;
79 }
80
81 static void get_word_sep(char *buf, int buf_size, const char *sep,
82 const char **pp)
83 {
84 if (**pp == '/') (*pp)++;
85 get_word_until_chars(buf, buf_size, sep, pp);
86 }
87
88 static void get_word(char *buf, int buf_size, const char **pp)
89 {
90 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
91 }
92
93 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
94 static int sdp_parse_rtpmap(AVFormatContext *s,
95 AVCodecContext *codec, RTSPStream *rtsp_st,
96 int payload_type, const char *p)
97 {
98 char buf[256];
99 int i;
100 AVCodec *c;
101 const char *c_name;
102
103 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
104 * see if we can handle this kind of payload.
105 * The space should normally not be there but some Real streams or
106 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
107 * have a trailing space. */
108 get_word_sep(buf, sizeof(buf), "/ ", &p);
109 if (payload_type >= RTP_PT_PRIVATE) {
110 RTPDynamicProtocolHandler *handler;
111 for (handler = RTPFirstDynamicPayloadHandler;
112 handler; handler = handler->next) {
113 if (!strcasecmp(buf, handler->enc_name) &&
114 codec->codec_type == handler->codec_type) {
115 codec->codec_id = handler->codec_id;
116 rtsp_st->dynamic_handler = handler;
117 if (handler->open)
118 rtsp_st->dynamic_protocol_context = handler->open();
119 break;
120 }
121 }
122 } else {
123 /* We are in a standard case
124 * (from http://www.iana.org/assignments/rtp-parameters). */
125 /* search into AVRtpPayloadTypes[] */
126 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
127 }
128
129 c = avcodec_find_decoder(codec->codec_id);
130 if (c && c->name)
131 c_name = c->name;
132 else
133 c_name = "(null)";
134
135 get_word_sep(buf, sizeof(buf), "/", &p);
136 i = atoi(buf);
137 switch (codec->codec_type) {
138 case CODEC_TYPE_AUDIO:
139 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
140 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
141 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
142 if (i > 0) {
143 codec->sample_rate = i;
144 get_word_sep(buf, sizeof(buf), "/", &p);
145 i = atoi(buf);
146 if (i > 0)
147 codec->channels = i;
148 // TODO: there is a bug here; if it is a mono stream, and
149 // less than 22000Hz, faad upconverts to stereo and twice
150 // the frequency. No problem, but the sample rate is being
151 // set here by the sdp line. Patch on its way. (rdm)
152 }
153 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
154 codec->sample_rate);
155 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
156 codec->channels);
157 break;
158 case CODEC_TYPE_VIDEO:
159 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
160 break;
161 default:
162 break;
163 }
164 return 0;
165 }
166
167 /* return the length and optionally the data */
168 static int hex_to_data(uint8_t *data, const char *p)
169 {
170 int c, len, v;
171
172 len = 0;
173 v = 1;
174 for (;;) {
175 skip_spaces(&p);
176 if (*p == '\0')
177 break;
178 c = toupper((unsigned char) *p++);
179 if (c >= '0' && c <= '9')
180 c = c - '0';
181 else if (c >= 'A' && c <= 'F')
182 c = c - 'A' + 10;
183 else
184 break;
185 v = (v << 4) | c;
186 if (v & 0x100) {
187 if (data)
188 data[len] = v;
189 len++;
190 v = 1;
191 }
192 }
193 return len;
194 }
195
196 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
197 char *attr, char *value)
198 {
199 switch (codec->codec_id) {
200 case CODEC_ID_MPEG4:
201 case CODEC_ID_AAC:
202 if (!strcmp(attr, "config")) {
203 /* decode the hexa encoded parameter */
204 int len = hex_to_data(NULL, value);
205 if (codec->extradata)
206 av_free(codec->extradata);
207 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
208 if (!codec->extradata)
209 return;
210 codec->extradata_size = len;
211 hex_to_data(codec->extradata, value);
212 }
213 break;
214 case CODEC_ID_VORBIS:
215 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
216 break;
217 default:
218 break;
219 }
220 return;
221 }
222
223 typedef struct {
224 const char *str;
225 uint16_t type;
226 uint32_t offset;
227 } AttrNameMap;
228
229 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
230 #define ATTR_NAME_TYPE_INT 0
231 #define ATTR_NAME_TYPE_STR 1
232 static const AttrNameMap attr_names[]=
233 {
234 { "SizeLength", ATTR_NAME_TYPE_INT,
235 offsetof(RTPPayloadData, sizelength) },
236 { "IndexLength", ATTR_NAME_TYPE_INT,
237 offsetof(RTPPayloadData, indexlength) },
238 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
239 offsetof(RTPPayloadData, indexdeltalength) },
240 { "profile-level-id", ATTR_NAME_TYPE_INT,
241 offsetof(RTPPayloadData, profile_level_id) },
242 { "StreamType", ATTR_NAME_TYPE_INT,
243 offsetof(RTPPayloadData, streamtype) },
244 { "mode", ATTR_NAME_TYPE_STR,
245 offsetof(RTPPayloadData, mode) },
246 { NULL, -1, -1 },
247 };
248
249 /* parse the attribute line from the fmtp a line of an sdp resonse. This
250 * is broken out as a function because it is used in rtp_h264.c, which is
251 * forthcoming. */
252 int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
253 char *value, int value_size)
254 {
255 skip_spaces(p);
256 if (**p) {
257 get_word_sep(attr, attr_size, "=", p);
258 if (**p == '=')
259 (*p)++;
260 get_word_sep(value, value_size, ";", p);
261 if (**p == ';')
262 (*p)++;
263 return 1;
264 }
265 return 0;
266 }
267
268 /* parse a SDP line and save stream attributes */
269 static void sdp_parse_fmtp(AVStream *st, const char *p)
270 {
271 char attr[256];
272 /* Vorbis setup headers can be up to 12KB and are sent base64
273 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
274 char value[16384];
275 int i;
276 RTSPStream *rtsp_st = st->priv_data;
277 AVCodecContext *codec = st->codec;
278 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
279
280 /* loop on each attribute */
281 while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
282 value, sizeof(value))) {
283 /* grab the codec extra_data from the config parameter of the fmtp
284 * line */
285 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
286 attr, value);
287 /* Looking for a known attribute */
288 for (i = 0; attr_names[i].str; ++i) {
289 if (!strcasecmp(attr, attr_names[i].str)) {
290 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
291 *(int *)((char *)rtp_payload_data +
292 attr_names[i].offset) = atoi(value);
293 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
294 *(char **)((char *)rtp_payload_data +
295 attr_names[i].offset) = av_strdup(value);
296 }
297 }
298 }
299 }
300
301 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
302 * and end time.
303 * Used for seeking in the rtp stream.
304 */
305 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
306 {
307 char buf[256];
308
309 skip_spaces(&p);
310 if (!av_stristart(p, "npt=", &p))
311 return;
312
313 *start = AV_NOPTS_VALUE;
314 *end = AV_NOPTS_VALUE;
315
316 get_word_sep(buf, sizeof(buf), "-", &p);
317 *start = parse_date(buf, 1);
318 if (*p == '-') {
319 p++;
320 get_word_sep(buf, sizeof(buf), "-", &p);
321 *end = parse_date(buf, 1);
322 }
323 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
324 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
325 }
326
327 typedef struct SDPParseState {
328 /* SDP only */
329 struct in_addr default_ip;
330 int default_ttl;
331 int skip_media; ///< set if an unknown m= line occurs
332 } SDPParseState;
333
334 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
335 int letter, const char *buf)
336 {
337 RTSPState *rt = s->priv_data;
338 char buf1[64], st_type[64];
339 const char *p;
340 enum CodecType codec_type;
341 int payload_type, i;
342 AVStream *st;
343 RTSPStream *rtsp_st;
344 struct in_addr sdp_ip;
345 int ttl;
346
347 dprintf(s, "sdp: %c='%s'\n", letter, buf);
348
349 p = buf;
350 if (s1->skip_media && letter != 'm')
351 return;
352 switch (letter) {
353 case 'c':
354 get_word(buf1, sizeof(buf1), &p);
355 if (strcmp(buf1, "IN") != 0)
356 return;
357 get_word(buf1, sizeof(buf1), &p);
358 if (strcmp(buf1, "IP4") != 0)
359 return;
360 get_word_sep(buf1, sizeof(buf1), "/", &p);
361 if (ff_inet_aton(buf1, &sdp_ip) == 0)
362 return;
363 ttl = 16;
364 if (*p == '/') {
365 p++;
366 get_word_sep(buf1, sizeof(buf1), "/", &p);
367 ttl = atoi(buf1);
368 }
369 if (s->nb_streams == 0) {
370 s1->default_ip = sdp_ip;
371 s1->default_ttl = ttl;
372 } else {
373 st = s->streams[s->nb_streams - 1];
374 rtsp_st = st->priv_data;
375 rtsp_st->sdp_ip = sdp_ip;
376 rtsp_st->sdp_ttl = ttl;
377 }
378 break;
379 case 's':
380 av_metadata_set(&s->metadata, "title", p);
381 break;
382 case 'i':
383 if (s->nb_streams == 0) {
384 av_metadata_set(&s->metadata, "comment", p);
385 break;
386 }
387 break;
388 case 'm':
389 /* new stream */
390 s1->skip_media = 0;
391 get_word(st_type, sizeof(st_type), &p);
392 if (!strcmp(st_type, "audio")) {
393 codec_type = CODEC_TYPE_AUDIO;
394 } else if (!strcmp(st_type, "video")) {
395 codec_type = CODEC_TYPE_VIDEO;
396 } else if (!strcmp(st_type, "application")) {
397 codec_type = CODEC_TYPE_DATA;
398 } else {
399 s1->skip_media = 1;
400 return;
401 }
402 rtsp_st = av_mallocz(sizeof(RTSPStream));
403 if (!rtsp_st)
404 return;
405 rtsp_st->stream_index = -1;
406 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
407
408 rtsp_st->sdp_ip = s1->default_ip;
409 rtsp_st->sdp_ttl = s1->default_ttl;
410
411 get_word(buf1, sizeof(buf1), &p); /* port */
412 rtsp_st->sdp_port = atoi(buf1);
413
414 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
415
416 /* XXX: handle list of formats */
417 get_word(buf1, sizeof(buf1), &p); /* format list */
418 rtsp_st->sdp_payload_type = atoi(buf1);
419
420 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
421 /* no corresponding stream */
422 } else {
423 st = av_new_stream(s, 0);
424 if (!st)
425 return;
426 st->priv_data = rtsp_st;
427 rtsp_st->stream_index = st->index;
428 st->codec->codec_type = codec_type;
429 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
430 /* if standard payload type, we can find the codec right now */
431 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
432 }
433 }
434 /* put a default control url */
435 av_strlcpy(rtsp_st->control_url, rt->control_uri,
436 sizeof(rtsp_st->control_url));
437 break;
438 case 'a':
439 if (av_strstart(p, "control:", &p)) {
440 if (s->nb_streams == 0) {
441 if (!strncmp(p, "rtsp://", 7))
442 av_strlcpy(rt->control_uri, p,
443 sizeof(rt->control_uri));
444 } else {
445 char proto[32];
446 /* get the control url */
447 st = s->streams[s->nb_streams - 1];
448 rtsp_st = st->priv_data;
449
450 /* XXX: may need to add full url resolution */
451 ff_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
452 NULL, NULL, 0, p);
453 if (proto[0] == '\0') {
454 /* relative control URL */
455 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
456 av_strlcat(rtsp_st->control_url, "/",
457 sizeof(rtsp_st->control_url));
458 av_strlcat(rtsp_st->control_url, p,
459 sizeof(rtsp_st->control_url));
460 } else
461 av_strlcpy(rtsp_st->control_url, p,
462 sizeof(rtsp_st->control_url));
463 }
464 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
465 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
466 get_word(buf1, sizeof(buf1), &p);
467 payload_type = atoi(buf1);
468 st = s->streams[s->nb_streams - 1];
469 rtsp_st = st->priv_data;
470 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
471 } else if (av_strstart(p, "fmtp:", &p)) {
472 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
473 get_word(buf1, sizeof(buf1), &p);
474 payload_type = atoi(buf1);
475 for (i = 0; i < s->nb_streams; i++) {
476 st = s->streams[i];
477 rtsp_st = st->priv_data;
478 if (rtsp_st->sdp_payload_type == payload_type) {
479 if (!(rtsp_st->dynamic_handler &&
480 rtsp_st->dynamic_handler->parse_sdp_a_line &&
481 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
482 i, rtsp_st->dynamic_protocol_context, buf)))
483 sdp_parse_fmtp(st, p);
484 }
485 }
486 } else if (av_strstart(p, "framesize:", &p)) {
487 // let dynamic protocol handlers have a stab at the line.
488 get_word(buf1, sizeof(buf1), &p);
489 payload_type = atoi(buf1);
490 for (i = 0; i < s->nb_streams; i++) {
491 st = s->streams[i];
492 rtsp_st = st->priv_data;
493 if (rtsp_st->sdp_payload_type == payload_type &&
494 rtsp_st->dynamic_handler &&
495 rtsp_st->dynamic_handler->parse_sdp_a_line)
496 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
497 rtsp_st->dynamic_protocol_context, buf);
498 }
499 } else if (av_strstart(p, "range:", &p)) {
500 int64_t start, end;
501
502 // this is so that seeking on a streamed file can work.
503 rtsp_parse_range_npt(p, &start, &end);
504 s->start_time = start;
505 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
506 s->duration = (end == AV_NOPTS_VALUE) ?
507 AV_NOPTS_VALUE : end - start;
508 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
509 if (atoi(p) == 1)
510 rt->transport = RTSP_TRANSPORT_RDT;
511 } else {
512 if (rt->server_type == RTSP_SERVER_WMS)
513 ff_wms_parse_sdp_a_line(s, p);
514 if (s->nb_streams > 0) {
515 if (rt->server_type == RTSP_SERVER_REAL)
516 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
517
518 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
519 if (rtsp_st->dynamic_handler &&
520 rtsp_st->dynamic_handler->parse_sdp_a_line)
521 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
522 s->nb_streams - 1,
523 rtsp_st->dynamic_protocol_context, buf);
524 }
525 }
526 break;
527 }
528 }
529
530 static int sdp_parse(AVFormatContext *s, const char *content)
531 {
532 const char *p;
533 int letter;
534 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
535 * contain long SDP lines containing complete ASF Headers (several
536 * kB) or arrays of MDPR (RM stream descriptor) headers plus
537 * "rulebooks" describing their properties. Therefore, the SDP line
538 * buffer is large.
539 *
540 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
541 char buf[16384], *q;
542 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
543
544 memset(s1, 0, sizeof(SDPParseState));
545 p = content;
546 for (;;) {
547 skip_spaces(&p);
548 letter = *p;
549 if (letter == '\0')
550 break;
551 p++;
552 if (*p != '=')
553 goto next_line;
554 p++;
555 /* get the content */
556 q = buf;
557 while (*p != '\n' && *p != '\r' && *p != '\0') {
558 if ((q - buf) < sizeof(buf) - 1)
559 *q++ = *p;
560 p++;
561 }
562 *q = '\0';
563 sdp_parse_line(s, s1, letter, buf);
564 next_line:
565 while (*p != '\n' && *p != '\0')
566 p++;
567 if (*p == '\n')
568 p++;
569 }
570 return 0;
571 }
572
573 /* close and free RTSP streams */
574 void ff_rtsp_close_streams(AVFormatContext *s)
575 {
576 RTSPState *rt = s->priv_data;
577 int i;
578 RTSPStream *rtsp_st;
579
580 for (i = 0; i < rt->nb_rtsp_streams; i++) {
581 rtsp_st = rt->rtsp_streams[i];
582 if (rtsp_st) {
583 if (rtsp_st->transport_priv) {
584 if (s->oformat) {
585 AVFormatContext *rtpctx = rtsp_st->transport_priv;
586 av_write_trailer(rtpctx);
587 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
588 uint8_t *ptr;
589 url_close_dyn_buf(rtpctx->pb, &ptr);
590 av_free(ptr);
591 } else {
592 url_fclose(rtpctx->pb);
593 }
594 av_metadata_free(&rtpctx->streams[0]->metadata);
595 av_metadata_free(&rtpctx->metadata);
596 av_free(rtpctx->streams[0]);
597 av_free(rtpctx);
598 } else if (rt->transport == RTSP_TRANSPORT_RDT)
599 ff_rdt_parse_close(rtsp_st->transport_priv);
600 else
601 rtp_parse_close(rtsp_st->transport_priv);
602 }
603 if (rtsp_st->rtp_handle)
604 url_close(rtsp_st->rtp_handle);
605 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
606 rtsp_st->dynamic_handler->close(
607 rtsp_st->dynamic_protocol_context);
608 }
609 }
610 av_free(rt->rtsp_streams);
611 if (rt->asf_ctx) {
612 av_close_input_stream (rt->asf_ctx);
613 rt->asf_ctx = NULL;
614 }
615 }
616
617 static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
618 URLContext *handle)
619 {
620 RTSPState *rt = s->priv_data;
621 AVFormatContext *rtpctx;
622 int ret;
623 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
624
625 if (!rtp_format)
626 return NULL;
627
628 /* Allocate an AVFormatContext for each output stream */
629 rtpctx = avformat_alloc_context();
630 if (!rtpctx)
631 return NULL;
632
633 rtpctx->oformat = rtp_format;
634 if (!av_new_stream(rtpctx, 0)) {
635 av_free(rtpctx);
636 return NULL;
637 }
638 /* Copy the max delay setting; the rtp muxer reads this. */
639 rtpctx->max_delay = s->max_delay;
640 /* Copy other stream parameters. */
641 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
642
643 /* Set the synchronized start time. */
644 rtpctx->start_time_realtime = rt->start_time;
645
646 /* Remove the local codec, link to the original codec
647 * context instead, to give the rtp muxer access to
648 * codec parameters. */
649 av_free(rtpctx->streams[0]->codec);
650 rtpctx->streams[0]->codec = st->codec;
651
652 if (handle) {
653 url_fdopen(&rtpctx->pb, handle);
654 } else
655 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
656 ret = av_write_header(rtpctx);
657
658 if (ret) {
659 if (handle) {
660 url_fclose(rtpctx->pb);
661 } else {
662 uint8_t *ptr;
663 url_close_dyn_buf(rtpctx->pb, &ptr);
664 av_free(ptr);
665 }
666 av_free(rtpctx->streams[0]);
667 av_free(rtpctx);
668 return NULL;
669 }
670
671 /* Copy the RTP AVStream timebase back to the original AVStream */
672 st->time_base = rtpctx->streams[0]->time_base;
673 return rtpctx;
674 }
675
676 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
677 {
678 RTSPState *rt = s->priv_data;
679 AVStream *st = NULL;
680
681 /* open the RTP context */
682 if (rtsp_st->stream_index >= 0)
683 st = s->streams[rtsp_st->stream_index];
684 if (!st)
685 s->ctx_flags |= AVFMTCTX_NOHEADER;
686
687 if (s->oformat) {
688 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
689 /* Ownage of rtp_handle is passed to the rtp mux context */
690 rtsp_st->rtp_handle = NULL;
691 } else if (rt->transport == RTSP_TRANSPORT_RDT)
692 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
693 rtsp_st->dynamic_protocol_context,
694 rtsp_st->dynamic_handler);
695 else
696 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
697 rtsp_st->sdp_payload_type,
698 &rtsp_st->rtp_payload_data);
699
700 if (!rtsp_st->transport_priv) {
701 return AVERROR(ENOMEM);
702 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
703 if (rtsp_st->dynamic_handler) {
704 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
705 rtsp_st->dynamic_protocol_context,
706 rtsp_st->dynamic_handler);
707 }
708 }
709
710 return 0;
711 }
712
713 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
714 static int rtsp_probe(AVProbeData *p)
715 {
716 if (av_strstart(p->filename, "rtsp:", NULL))
717 return AVPROBE_SCORE_MAX;
718 return 0;
719 }
720
721 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
722 {
723 const char *p;
724 int v;
725
726 p = *pp;
727 skip_spaces(&p);
728 v = strtol(p, (char **)&p, 10);
729 if (*p == '-') {
730 p++;
731 *min_ptr = v;
732 v = strtol(p, (char **)&p, 10);
733 *max_ptr = v;
734 } else {
735 *min_ptr = v;
736 *max_ptr = v;
737 }
738 *pp = p;
739 }
740
741 /* XXX: only one transport specification is parsed */
742 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
743 {
744 char transport_protocol[16];
745 char profile[16];
746 char lower_transport[16];
747 char parameter[16];
748 RTSPTransportField *th;
749 char buf[256];
750
751 reply->nb_transports = 0;
752
753 for (;;) {
754 skip_spaces(&p);
755 if (*p == '\0')
756 break;
757
758 th = &reply->transports[reply->nb_transports];
759
760 get_word_sep(transport_protocol, sizeof(transport_protocol),
761 "/", &p);
762 if (!strcasecmp (transport_protocol, "rtp")) {
763 get_word_sep(profile, sizeof(profile), "/;,", &p);
764 lower_transport[0] = '\0';
765 /* rtp/avp/<protocol> */
766 if (*p == '/') {
767 get_word_sep(lower_transport, sizeof(lower_transport),
768 ";,", &p);
769 }
770 th->transport = RTSP_TRANSPORT_RTP;
771 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
772 !strcasecmp (transport_protocol, "x-real-rdt")) {
773 /* x-pn-tng/<protocol> */
774 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
775 profile[0] = '\0';
776 th->transport = RTSP_TRANSPORT_RDT;
777 }
778 if (!strcasecmp(lower_transport, "TCP"))
779 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
780 else
781 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
782
783 if (*p == ';')
784 p++;
785 /* get each parameter */
786 while (*p != '\0' && *p != ',') {
787 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
788 if (!strcmp(parameter, "port")) {
789 if (*p == '=') {
790 p++;
791 rtsp_parse_range(&th->port_min, &th->port_max, &p);
792 }
793 } else if (!strcmp(parameter, "client_port")) {
794 if (*p == '=') {
795 p++;
796 rtsp_parse_range(&th->client_port_min,
797 &th->client_port_max, &p);
798 }
799 } else if (!strcmp(parameter, "server_port")) {
800 if (*p == '=') {
801 p++;
802 rtsp_parse_range(&th->server_port_min,
803 &th->server_port_max, &p);
804 }
805 } else if (!strcmp(parameter, "interleaved")) {
806 if (*p == '=') {
807 p++;
808 rtsp_parse_range(&th->interleaved_min,
809 &th->interleaved_max, &p);
810 }
811 } else if (!strcmp(parameter, "multicast")) {
812 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
813 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
814 } else if (!strcmp(parameter, "ttl")) {
815 if (*p == '=') {
816 p++;
817 th->ttl = strtol(p, (char **)&p, 10);
818 }
819 } else if (!strcmp(parameter, "destination")) {
820 struct in_addr ipaddr;
821
822 if (*p == '=') {
823 p++;
824 get_word_sep(buf, sizeof(buf), ";,", &p);
825 if (ff_inet_aton(buf, &ipaddr))
826 th->destination = ntohl(ipaddr.s_addr);
827 }
828 }
829 while (*p != ';' && *p != '\0' && *p != ',')
830 p++;
831 if (*p == ';')
832 p++;
833 }
834 if (*p == ',')
835 p++;
836
837 reply->nb_transports++;
838 }
839 }
840
841 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
842 HTTPAuthState *auth_state)
843 {
844 const char *p;
845
846 /* NOTE: we do case independent match for broken servers */
847 p = buf;
848 if (av_stristart(p, "Session:", &p)) {
849 int t;
850 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
851 if (av_stristart(p, ";timeout=", &p) &&
852 (t = strtol(p, NULL, 10)) > 0) {
853 reply->timeout = t;
854 }
855 } else if (av_stristart(p, "Content-Length:", &p)) {
856 reply->content_length = strtol(p, NULL, 10);
857 } else if (av_stristart(p, "Transport:", &p)) {
858 rtsp_parse_transport(reply, p);
859 } else if (av_stristart(p, "CSeq:", &p)) {
860 reply->seq = strtol(p, NULL, 10);
861 } else if (av_stristart(p, "Range:", &p)) {
862 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
863 } else if (av_stristart(p, "RealChallenge1:", &p)) {
864 skip_spaces(&p);
865 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
866 } else if (av_stristart(p, "Server:", &p)) {
867 skip_spaces(&p);
868 av_strlcpy(reply->server, p, sizeof(reply->server));
869 } else if (av_stristart(p, "Notice:", &p) ||
870 av_stristart(p, "X-Notice:", &p)) {
871 reply->notice = strtol(p, NULL, 10);
872 } else if (av_stristart(p, "Location:", &p)) {
873 skip_spaces(&p);
874 av_strlcpy(reply->location, p , sizeof(reply->location));
875 } else if (av_stristart(p, "WWW-Authenticate:", &p) && auth_state) {
876 skip_spaces(&p);
877 ff_http_auth_handle_header(auth_state, "WWW-Authenticate", p);
878 } else if (av_stristart(p, "Authentication-Info:", &p) && auth_state) {
879 skip_spaces(&p);
880 ff_http_auth_handle_header(auth_state, "Authentication-Info", p);
881 }
882 }
883
884 /* skip a RTP/TCP interleaved packet */
885 void ff_rtsp_skip_packet(AVFormatContext *s)
886 {
887 RTSPState *rt = s->priv_data;
888 int ret, len, len1;
889 uint8_t buf[1024];
890
891 ret = url_read_complete(rt->rtsp_hd, buf, 3);
892 if (ret != 3)
893 return;
894 len = AV_RB16(buf + 1);
895
896 dprintf(s, "skipping RTP packet len=%d\n", len);
897
898 /* skip payload */
899 while (len > 0) {
900 len1 = len;
901 if (len1 > sizeof(buf))
902 len1 = sizeof(buf);
903 ret = url_read_complete(rt->rtsp_hd, buf, len1);
904 if (ret != len1)
905 return;
906 len -= len1;
907 }
908 }
909
910 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
911 unsigned char **content_ptr,
912 int return_on_interleaved_data)
913 {
914 RTSPState *rt = s->priv_data;
915 char buf[4096], buf1[1024], *q;
916 unsigned char ch;
917 const char *p;
918 int ret, content_length, line_count = 0;
919 unsigned char *content = NULL;
920
921 memset(reply, 0, sizeof(*reply));
922
923 /* parse reply (XXX: use buffers) */
924 rt->last_reply[0] = '\0';
925 for (;;) {
926 q = buf;
927 for (;;) {
928 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
929 #ifdef DEBUG_RTP_TCP
930 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
931 #endif
932 if (ret != 1)
933 return -1;
934 if (ch == '\n')
935 break;
936 if (ch == '$') {
937 /* XXX: only parse it if first char on line ? */
938 if (return_on_interleaved_data) {
939 return 1;
940 } else
941 ff_rtsp_skip_packet(s);
942 } else if (ch != '\r') {
943 if ((q - buf) < sizeof(buf) - 1)
944 *q++ = ch;
945 }
946 }
947 *q = '\0';
948
949 dprintf(s, "line='%s'\n", buf);
950
951 /* test if last line */
952 if (buf[0] == '\0')
953 break;
954 p = buf;
955 if (line_count == 0) {
956 /* get reply code */
957 get_word(buf1, sizeof(buf1), &p);
958 get_word(buf1, sizeof(buf1), &p);
959 reply->status_code = atoi(buf1);
960 } else {
961 ff_rtsp_parse_line(reply, p, &rt->auth_state);
962 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
963 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
964 }
965 line_count++;
966 }
967
968 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
969 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
970
971 content_length = reply->content_length;
972 if (content_length > 0) {
973 /* leave some room for a trailing '\0' (useful for simple parsing) */
974 content = av_malloc(content_length + 1);
975 (void)url_read_complete(rt->rtsp_hd, content, content_length);
976 content[content_length] = '\0';
977 }
978 if (content_ptr)
979 *content_ptr = content;
980 else
981 av_free(content);
982
983 if (rt->seq != reply->seq) {
984 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
985 rt->seq, reply->seq);
986 }
987
988 /* EOS */
989 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
990 reply->notice == 2104 /* Start-of-Stream Reached */ ||
991 reply->notice == 2306 /* Continuous Feed Terminated */) {
992 rt->state = RTSP_STATE_IDLE;
993 } else if (reply->notice >= 4400 && reply->notice < 5500) {
994 return AVERROR(EIO); /* data or server error */
995 } else if (reply->notice == 2401 /* Ticket Expired */ ||
996 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
997 return AVERROR(EPERM);
998
999 return 0;
1000 }
1001
1002 void ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
1003 const char *method, const char *url,
1004 const char *headers,
1005 const unsigned char *send_content,
1006 int send_content_length)
1007 {
1008 RTSPState *rt = s->priv_data;
1009 char buf[4096];
1010
1011 rt->seq++;
1012 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1013 if (headers)
1014 av_strlcat(buf, headers, sizeof(buf));
1015 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
1016 if (rt->session_id[0] != '\0' && (!headers ||
1017 !strstr(headers, "\nIf-Match:"))) {
1018 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
1019 }
1020 if (rt->auth[0]) {
1021 char *str = ff_http_auth_create_response(&rt->auth_state,
1022 rt->auth, url, method);
1023 if (str)
1024 av_strlcat(buf, str, sizeof(buf));
1025 av_free(str);
1026 }
1027 if (send_content_length > 0 && send_content)
1028 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1029 av_strlcat(buf, "\r\n", sizeof(buf));
1030
1031 dprintf(s, "Sending:\n%s--\n", buf);
1032
1033 url_write(rt->rtsp_hd, buf, strlen(buf));
1034 if (send_content_length > 0 && send_content)
1035 url_write(rt->rtsp_hd, send_content, send_content_length);
1036 rt->last_cmd_time = av_gettime();
1037 }
1038
1039 void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1040 const char *url, const char *headers)
1041 {
1042 ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
1043 }
1044
1045 void ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1046 const char *headers, RTSPMessageHeader *reply,
1047 unsigned char **content_ptr)
1048 {
1049 ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1050 content_ptr, NULL, 0);
1051 }
1052
1053 void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1054 const char *method, const char *url,
1055 const char *header,
1056 RTSPMessageHeader *reply,
1057 unsigned char **content_ptr,
1058 const unsigned char *send_content,
1059 int send_content_length)
1060 {
1061 RTSPState *rt = s->priv_data;
1062 HTTPAuthType cur_auth_type;
1063
1064 retry:
1065 cur_auth_type = rt->auth_state.auth_type;
1066 ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1067 send_content, send_content_length);
1068
1069 ff_rtsp_read_reply(s, reply, content_ptr, 0);
1070
1071 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1072 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1073 goto retry;
1074 }
1075
1076 /**
1077 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1078 */
1079 static int make_setup_request(AVFormatContext *s, const char *host, int port,
1080 int lower_transport, const char *real_challenge)
1081 {
1082 RTSPState *rt = s->priv_data;
1083 int rtx, j, i, err, interleave = 0;
1084 RTSPStream *rtsp_st;
1085 RTSPMessageHeader reply1, *reply = &reply1;
1086 char cmd[2048];
1087 const char *trans_pref;
1088
1089 if (rt->transport == RTSP_TRANSPORT_RDT)
1090 trans_pref = "x-pn-tng";
1091 else
1092 trans_pref = "RTP/AVP";
1093
1094 /* default timeout: 1 minute */
1095 rt->timeout = 60;
1096
1097 /* for each stream, make the setup request */
1098 /* XXX: we assume the same server is used for the control of each
1099 * RTSP stream */
1100
1101 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1102 char transport[2048];
1103
1104 /**
1105 * WMS serves all UDP data over a single connection, the RTX, which
1106 * isn't necessarily the first in the SDP but has to be the first
1107 * to be set up, else the second/third SETUP will fail with a 461.
1108 */
1109 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1110 rt->server_type == RTSP_SERVER_WMS) {
1111 if (i == 0) {
1112 /* rtx first */
1113 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1114 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1115 if (len >= 4 &&
1116 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1117 "/rtx"))
1118 break;
1119 }
1120 if (rtx == rt->nb_rtsp_streams)
1121 return -1; /* no RTX found */
1122 rtsp_st = rt->rtsp_streams[rtx];
1123 } else
1124 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1125 } else
1126 rtsp_st = rt->rtsp_streams[i];
1127
1128 /* RTP/UDP */
1129 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1130 char buf[256];
1131
1132 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1133 port = reply->transports[0].client_port_min;
1134 goto have_port;
1135 }
1136
1137 /* first try in specified port range */
1138 if (RTSP_RTP_PORT_MIN != 0) {
1139 while (j <= RTSP_RTP_PORT_MAX) {
1140 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1141 "?localport=%d", j);
1142 /* we will use two ports per rtp stream (rtp and rtcp) */
1143 j += 2;
1144 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1145 goto rtp_opened;
1146 }
1147 }
1148
1149 #if 0
1150 /* then try on any port */
1151 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1152 err = AVERROR_INVALIDDATA;
1153 goto fail;
1154 }
1155 #endif
1156
1157 rtp_opened:
1158 port = rtp_get_local_port(rtsp_st->rtp_handle);
1159 have_port:
1160 snprintf(transport, sizeof(transport) - 1,
1161 "%s/UDP;", trans_pref);
1162 if (rt->server_type != RTSP_SERVER_REAL)
1163 av_strlcat(transport, "unicast;", sizeof(transport));
1164 av_strlcatf(transport, sizeof(transport),
1165 "client_port=%d", port);
1166 if (rt->transport == RTSP_TRANSPORT_RTP &&
1167 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1168 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1169 }
1170
1171 /* RTP/TCP */
1172 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1173 /** For WMS streams, the application streams are only used for
1174 * UDP. When trying to set it up for TCP streams, the server
1175 * will return an error. Therefore, we skip those streams. */
1176 if (rt->server_type == RTSP_SERVER_WMS &&
1177 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1178 CODEC_TYPE_DATA)
1179 continue;
1180 snprintf(transport, sizeof(transport) - 1,
1181 "%s/TCP;", trans_pref);
1182 if (rt->server_type == RTSP_SERVER_WMS)
1183 av_strlcat(transport, "unicast;", sizeof(transport));
1184 av_strlcatf(transport, sizeof(transport),
1185 "interleaved=%d-%d",
1186 interleave, interleave + 1);
1187 interleave += 2;
1188 }
1189
1190 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1191 snprintf(transport, sizeof(transport) - 1,
1192 "%s/UDP;multicast", trans_pref);
1193 }
1194 if (s->oformat) {
1195 av_strlcat(transport, ";mode=receive", sizeof(transport));
1196 } else if (rt->server_type == RTSP_SERVER_REAL ||
1197 rt->server_type == RTSP_SERVER_WMS)
1198 av_strlcat(transport, ";mode=play", sizeof(transport));
1199 snprintf(cmd, sizeof(cmd),
1200 "Transport: %s\r\n",
1201 transport);
1202 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1203 char real_res[41], real_csum[9];
1204 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1205 real_challenge);
1206 av_strlcatf(cmd, sizeof(cmd),
1207 "If-Match: %s\r\n"
1208 "RealChallenge2: %s, sd=%s\r\n",
1209 rt->session_id, real_res, real_csum);
1210 }
1211 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
1212 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1213 err = 1;
1214 goto fail;
1215 } else if (reply->status_code != RTSP_STATUS_OK ||
1216 reply->nb_transports != 1) {
1217 err = AVERROR_INVALIDDATA;
1218 goto fail;
1219 }
1220
1221 /* XXX: same protocol for all streams is required */
1222 if (i > 0) {
1223 if (reply->transports[0].lower_transport != rt->lower_transport ||
1224 reply->transports[0].transport != rt->transport) {
1225 err = AVERROR_INVALIDDATA;
1226 goto fail;
1227 }
1228 } else {
1229 rt->lower_transport = reply->transports[0].lower_transport;
1230 rt->transport = reply->transports[0].transport;
1231 }
1232
1233 /* close RTP connection if not choosen */
1234 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1235 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1236 url_close(rtsp_st->rtp_handle);
1237 rtsp_st->rtp_handle = NULL;
1238 }
1239
1240 switch(reply->transports[0].lower_transport) {
1241 case RTSP_LOWER_TRANSPORT_TCP:
1242 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1243 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1244 break;
1245
1246 case RTSP_LOWER_TRANSPORT_UDP: {
1247 char url[1024];
1248
1249 /* XXX: also use address if specified */
1250 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1251 reply->transports[0].server_port_min, NULL);
1252 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1253 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1254 err = AVERROR_INVALIDDATA;
1255 goto fail;
1256 }
1257 /* Try to initialize the connection state in a
1258 * potential NAT router by sending dummy packets.
1259 * RTP/RTCP dummy packets are used for RDT, too.
1260 */
1261 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
1262 rtp_send_punch_packets(rtsp_st->rtp_handle);
1263 break;
1264 }
1265 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1266 char url[1024];
1267 struct in_addr in;
1268 int port, ttl;
1269
1270 if (reply->transports[0].destination) {
1271 in.s_addr = htonl(reply->transports[0].destination);
1272 port = reply->transports[0].port_min;
1273 ttl = reply->transports[0].ttl;
1274 } else {
1275 in = rtsp_st->sdp_ip;
1276 port = rtsp_st->sdp_port;
1277 ttl = rtsp_st->sdp_ttl;
1278 }
1279 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1280 port, "?ttl=%d", ttl);
1281 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1282 err = AVERROR_INVALIDDATA;
1283 goto fail;
1284 }
1285 break;
1286 }
1287 }
1288
1289 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1290 goto fail;
1291 }
1292
1293 if (reply->timeout > 0)
1294 rt->timeout = reply->timeout;
1295
1296 if (rt->server_type == RTSP_SERVER_REAL)
1297 rt->need_subscription = 1;
1298
1299 return 0;
1300
1301 fail:
1302 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1303 if (rt->rtsp_streams[i]->rtp_handle) {
1304 url_close(rt->rtsp_streams[i]->rtp_handle);
1305 rt->rtsp_streams[i]->rtp_handle = NULL;
1306 }
1307 }
1308 return err;
1309 }
1310
1311 static int rtsp_read_play(AVFormatContext *s)
1312 {
1313 RTSPState *rt = s->priv_data;
1314 RTSPMessageHeader reply1, *reply = &reply1;
1315 char cmd[1024];
1316
1317 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1318
1319 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1320 if (rt->state == RTSP_STATE_PAUSED) {
1321 cmd[0] = 0;
1322 } else {
1323 snprintf(cmd, sizeof(cmd),
1324 "Range: npt=%0.3f-\r\n",
1325 (double)rt->seek_timestamp / AV_TIME_BASE);
1326 }
1327 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
1328 if (reply->status_code != RTSP_STATUS_OK) {
1329 return -1;
1330 }
1331 }
1332 rt->state = RTSP_STATE_STREAMING;
1333 return 0;
1334 }
1335
1336 static int rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
1337 {
1338 RTSPState *rt = s->priv_data;
1339 char cmd[1024];
1340 unsigned char *content = NULL;
1341 int ret;
1342
1343 /* describe the stream */
1344 snprintf(cmd, sizeof(cmd),
1345 "Accept: application/sdp\r\n");
1346 if (rt->server_type == RTSP_SERVER_REAL) {
1347 /**
1348 * The Require: attribute is needed for proper streaming from
1349 * Realmedia servers.
1350 */
1351 av_strlcat(cmd,
1352 "Require: com.real.retain-entity-for-setup\r\n",
1353 sizeof(cmd));
1354 }
1355 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
1356 if (!content)
1357 return AVERROR_INVALIDDATA;
1358 if (reply->status_code != RTSP_STATUS_OK) {
1359 av_freep(&content);
1360 return AVERROR_INVALIDDATA;
1361 }
1362
1363 /* now we got the SDP description, we parse it */
1364 ret = sdp_parse(s, (const char *)content);
1365 av_freep(&content);
1366 if (ret < 0)
1367 return AVERROR_INVALIDDATA;
1368
1369 return 0;
1370 }
1371
1372 static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
1373 {
1374 RTSPState *rt = s->priv_data;
1375 RTSPMessageHeader reply1, *reply = &reply1;
1376 int i;
1377 char *sdp;
1378 AVFormatContext sdp_ctx, *ctx_array[1];
1379
1380 rt->start_time = av_gettime();
1381
1382 /* Announce the stream */
1383 sdp = av_mallocz(8192);
1384 if (sdp == NULL)
1385 return AVERROR(ENOMEM);
1386 /* We create the SDP based on the RTSP AVFormatContext where we
1387 * aren't allowed to change the filename field. (We create the SDP
1388 * based on the RTSP context since the contexts for the RTP streams
1389 * don't exist yet.) In order to specify a custom URL with the actual
1390 * peer IP instead of the originally specified hostname, we create
1391 * a temporary copy of the AVFormatContext, where the custom URL is set.
1392 *
1393 * FIXME: Create the SDP without copying the AVFormatContext.
1394 * This either requires setting up the RTP stream AVFormatContexts
1395 * already here (complicating things immensely) or getting a more
1396 * flexible SDP creation interface.
1397 */
1398 sdp_ctx = *s;
1399 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1400 "rtsp", NULL, addr, -1, NULL);
1401 ctx_array[0] = &sdp_ctx;
1402 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
1403 av_free(sdp);
1404 return AVERROR_INVALIDDATA;
1405 }
1406 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
1407 ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
1408 "Content-Type: application/sdp\r\n",
1409 reply, NULL, sdp, strlen(sdp));
1410 av_free(sdp);
1411 if (reply->status_code != RTSP_STATUS_OK)
1412 return AVERROR_INVALIDDATA;
1413
1414 /* Set up the RTSPStreams for each AVStream */
1415 for (i = 0; i < s->nb_streams; i++) {
1416 RTSPStream *rtsp_st;
1417 AVStream *st = s->streams[i];
1418
1419 rtsp_st = av_mallocz(sizeof(RTSPStream));
1420 if (!rtsp_st)
1421 return AVERROR(ENOMEM);
1422 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1423
1424 st->priv_data = rtsp_st;
1425 rtsp_st->stream_index = i;
1426
1427 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
1428 /* Note, this must match the relative uri set in the sdp content */
1429 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1430 "/streamid=%d", i);
1431 }
1432
1433 return 0;
1434 }
1435
1436 int ff_rtsp_connect(AVFormatContext *s)
1437 {
1438 RTSPState *rt = s->priv_data;
1439 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1440 char *option_list, *option, *filename;
1441 URLContext *rtsp_hd;
1442 int port, err, tcp_fd;
1443 RTSPMessageHeader reply1, *reply = &reply1;
1444 int lower_transport_mask = 0;
1445 char real_challenge[64];
1446 struct sockaddr_storage peer;
1447 socklen_t peer_len = sizeof(peer);
1448
1449 if (!ff_network_init())
1450 return AVERROR(EIO);
1451 redirect:
1452 /* extract hostname and port */
1453 ff_url_split(NULL, 0, auth, sizeof(auth),
1454 host, sizeof(host), &port, path, sizeof(path), s->filename);
1455 if (*auth) {
1456 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
1457 }
1458 if (port < 0)
1459 port = RTSP_DEFAULT_PORT;
1460
1461 /* search for options */
1462 option_list = strrchr(path, '?');
1463 if (option_list) {
1464 /* Strip out the RTSP specific options, write out the rest of
1465 * the options back into the same string. */
1466 filename = option_list;
1467 while (option_list) {
1468 /* move the option pointer */
1469 option = ++option_list;
1470 option_list = strchr(option_list, '&');
1471 if (option_list)
1472 *option_list = 0;
1473
1474 /* handle the options */
1475 if (!strcmp(option, "udp")) {
1476 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
1477 } else if (!strcmp(option, "multicast")) {
1478 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1479 } else if (!strcmp(option, "tcp")) {
1480 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
1481 } else {
1482 /* Write options back into the buffer, using memmove instead
1483 * of strcpy since the strings may overlap. */
1484 int len = strlen(option);
1485 memmove(++filename, option, len);
1486 filename += len;
1487 if (option_list) *filename = '&';
1488 }
1489 }
1490 *filename = 0;
1491 }
1492
1493 if (!lower_transport_mask)
1494 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1495
1496 if (s->oformat) {
1497 /* Only UDP or TCP - UDP multicast isn't supported. */
1498 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1499 (1 << RTSP_LOWER_TRANSPORT_TCP);
1500 if (!lower_transport_mask) {
1501 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1502 "only UDP and TCP are supported for output.\n");
1503 err = AVERROR(EINVAL);
1504 goto fail;
1505 }
1506 }
1507
1508 /* Construct the URI used in request; this is similar to s->filename,
1509 * but with authentication credentials removed and RTSP specific options
1510 * stripped out. */
1511 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1512 host, port, "%s", path);
1513
1514 /* open the tcp connexion */
1515 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1516 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1517 err = AVERROR(EIO);
1518 goto fail;
1519 }
1520 rt->rtsp_hd = rtsp_hd;
1521 rt->seq = 0;
1522
1523 tcp_fd = url_get_file_handle(rtsp_hd);
1524 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1525 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1526 NULL, 0, NI_NUMERICHOST);
1527 }
1528
1529 /* request options supported by the server; this also detects server
1530 * type */
1531 for (rt->server_type = RTSP_SERVER_RTP;;) {
1532 cmd[0] = 0;
1533 if (rt->server_type == RTSP_SERVER_REAL)
1534 av_strlcat(cmd,
1535 /**
1536 * The following entries are required for proper
1537 * streaming from a Realmedia server. They are
1538 * interdependent in some way although we currently
1539 * don't quite understand how. Values were copied
1540 * from mplayer SVN r23589.
1541 * @param CompanyID is a 16-byte ID in base64
1542 * @param ClientChallenge is a 16-byte ID in hex
1543 */
1544 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1545 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1546 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1547 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1548 sizeof(cmd));
1549 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1550 if (reply->status_code != RTSP_STATUS_OK) {
1551 err = AVERROR_INVALIDDATA;
1552 goto fail;
1553 }
1554
1555 /* detect server type if not standard-compliant RTP */
1556 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1557 rt->server_type = RTSP_SERVER_REAL;
1558 continue;
1559 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1560 rt->server_type = RTSP_SERVER_WMS;
1561 } else if (rt->server_type == RTSP_SERVER_REAL)
1562 strcpy(real_challenge, reply->real_challenge);
1563 break;
1564 }
1565
1566 if (s->iformat)
1567 err = rtsp_setup_input_streams(s, reply);
1568 else
1569 err = rtsp_setup_output_streams(s, host);
1570 if (err)
1571 goto fail;
1572
1573 do {
1574 int lower_transport = ff_log2_tab[lower_transport_mask &
1575 ~(lower_transport_mask - 1)];
1576
1577 err = make_setup_request(s, host, port, lower_transport,
1578 rt->server_type == RTSP_SERVER_REAL ?
1579 real_challenge : NULL);
1580 if (err < 0)
1581 goto fail;
1582 lower_transport_mask &= ~(1 << lower_transport);
1583 if (lower_transport_mask == 0 && err == 1) {
1584 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1585 goto fail;
1586 }
1587 } while (err);
1588
1589 rt->state = RTSP_STATE_IDLE;
1590 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1591 return 0;
1592 fail:
1593 ff_rtsp_close_streams(s);
1594 url_close(rt->rtsp_hd);
1595 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1596 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1597 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1598 reply->status_code,
1599 s->filename);
1600 goto redirect;
1601 }
1602 ff_network_close();
1603 return err;
1604 }
1605 #endif
1606
1607 #if CONFIG_RTSP_DEMUXER
1608 static int rtsp_read_header(AVFormatContext *s,
1609 AVFormatParameters *ap)
1610 {
1611 RTSPState *rt = s->priv_data;
1612 int ret;
1613
1614 ret = ff_rtsp_connect(s);
1615 if (ret)
1616 return ret;
1617
1618 if (ap->initial_pause) {
1619 /* do not start immediately */
1620 } else {
1621 if (rtsp_read_play(s) < 0) {
1622 ff_rtsp_close_streams(s);
1623 url_close(rt->rtsp_hd);
1624 return AVERROR_INVALIDDATA;
1625 }
1626 }
1627
1628 return 0;
1629 }
1630
1631 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1632 uint8_t *buf, int buf_size)
1633 {
1634 RTSPState *rt = s->priv_data;
1635 RTSPStream *rtsp_st;
1636 fd_set rfds;
1637 int fd, fd_max, n, i, ret, tcp_fd;
1638 struct timeval tv;
1639
1640 for (;;) {
1641 if (url_interrupt_cb())
1642 return AVERROR(EINTR);
1643 FD_ZERO(&rfds);
1644 if (rt->rtsp_hd) {
1645 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1646 FD_SET(tcp_fd, &rfds);
1647 } else {
1648 fd_max = 0;
1649 tcp_fd = -1;
1650 }
1651 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1652 rtsp_st = rt->rtsp_streams[i];
1653 if (rtsp_st->rtp_handle) {
1654 /* currently, we cannot probe RTCP handle because of
1655 * blocking restrictions */
1656 fd = url_get_file_handle(rtsp_st->rtp_handle);
1657 if (fd > fd_max)
1658 fd_max = fd;
1659 FD_SET(fd, &rfds);
1660 }
1661 }
1662 tv.tv_sec = 0;
1663 tv.tv_usec = 100 * 1000;
1664 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1665 if (n > 0) {
1666 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1667 rtsp_st = rt->rtsp_streams[i];
1668 if (rtsp_st->rtp_handle) {
1669 fd = url_get_file_handle(rtsp_st->rtp_handle);
1670 if (FD_ISSET(fd, &rfds)) {
1671 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1672 if (ret > 0) {
1673 *prtsp_st = rtsp_st;
1674 return ret;
1675 }
1676 }
1677 }
1678 }
1679 #if CONFIG_RTSP_DEMUXER
1680 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1681 RTSPMessageHeader reply;
1682
1683 ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1684 if (ret < 0)
1685 return ret;
1686 /* XXX: parse message */
1687 if (rt->state != RTSP_STATE_STREAMING)
1688 return 0;
1689 }
1690 #endif
1691 }
1692 }
1693 }
1694
1695 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1696 uint8_t *buf, int buf_size)
1697 {
1698 RTSPState *rt = s->priv_data;
1699 int id, len, i, ret;
1700 RTSPStream *rtsp_st;
1701
1702 #ifdef DEBUG_RTP_TCP
1703 dprintf(s, "tcp_read_packet:\n");
1704 #endif
1705 redo:
1706 for (;;) {
1707 RTSPMessageHeader reply;
1708
1709 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
1710 if (ret == -1)
1711 return -1;
1712 if (ret == 1) /* received '$' */
1713 break;
1714 /* XXX: parse message */
1715 if (rt->state != RTSP_STATE_STREAMING)
1716 return 0;
1717 }
1718 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1719 if (ret != 3)
1720 return -1;
1721 id = buf[0];
1722 len = AV_RB16(buf + 1);
1723 #ifdef DEBUG_RTP_TCP
1724 dprintf(s, "id=%d len=%d\n", id, len);
1725 #endif
1726 if (len > buf_size || len < 12)
1727 goto redo;
1728 /* get the data */
1729 ret = url_read_complete(rt->rtsp_hd, buf, len);
1730 if (ret != len)
1731 return -1;
1732 if (rt->transport == RTSP_TRANSPORT_RDT &&
1733 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1734 return -1;
1735
1736 /* find the matching stream */
1737 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1738 rtsp_st = rt->rtsp_streams[i];
1739 if (id >= rtsp_st->interleaved_min &&
1740 id <= rtsp_st->interleaved_max)
1741 goto found;
1742 }
1743 goto redo;
1744 found:
1745 *prtsp_st = rtsp_st;
1746 return len;
1747 }
1748
1749 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1750 {
1751 RTSPState *rt = s->priv_data;
1752 int ret, len;
1753 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1754 RTSPStream *rtsp_st;
1755
1756 /* get next frames from the same RTP packet */
1757 if (rt->cur_transport_priv) {
1758 if (rt->transport == RTSP_TRANSPORT_RDT) {
1759 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1760 } else
1761 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1762 if (ret == 0) {
1763 rt->cur_transport_priv = NULL;
1764 return 0;
1765 } else if (ret == 1) {
1766 return 0;
1767 } else
1768 rt->cur_transport_priv = NULL;
1769 }
1770
1771 /* read next RTP packet */
1772 redo:
1773 switch(rt->lower_transport) {
1774 default:
1775 #if CONFIG_RTSP_DEMUXER
1776 case RTSP_LOWER_TRANSPORT_TCP:
1777 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1778 break;
1779 #endif
1780 case RTSP_LOWER_TRANSPORT_UDP:
1781 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1782 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1783 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1784 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1785 break;
1786 }
1787 if (len < 0)
1788 return len;
1789 if (len == 0)
1790 return AVERROR_EOF;
1791 if (rt->transport == RTSP_TRANSPORT_RDT) {
1792 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1793 } else
1794 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1795 if (ret < 0)
1796 goto redo;
1797 if (ret == 1)
1798 /* more packets may follow, so we save the RTP context */
1799 rt->cur_transport_priv = rtsp_st->transport_priv;
1800
1801 return ret;
1802 }
1803
1804 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1805 {
1806 RTSPState *rt = s->priv_data;
1807 int ret;
1808 RTSPMessageHeader reply1, *reply = &reply1;
1809 char cmd[1024];
1810
1811 if (rt->server_type == RTSP_SERVER_REAL) {
1812 int i;
1813 enum AVDiscard cache[MAX_STREAMS];
1814
1815 for (i = 0; i < s->nb_streams; i++)
1816 cache[i] = s->streams[i]->discard;
1817
1818 if (!rt->need_subscription) {
1819 if (memcmp (cache, rt->real_setup_cache,
1820 sizeof(enum AVDiscard) * s->nb_streams)) {
1821 snprintf(cmd, sizeof(cmd),
1822 "Unsubscribe: %s\r\n",
1823 rt->last_subscription);
1824 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1825 cmd, reply, NULL);
1826 if (reply->status_code != RTSP_STATUS_OK)
1827 return AVERROR_INVALIDDATA;
1828 rt->need_subscription = 1;
1829 }
1830 }
1831
1832 if (rt->need_subscription) {
1833 int r, rule_nr, first = 1;
1834
1835 memcpy(rt->real_setup_cache, cache,
1836 sizeof(enum AVDiscard) * s->nb_streams);
1837 rt->last_subscription[0] = 0;
1838
1839 snprintf(cmd, sizeof(cmd),
1840 "Subscribe: ");
1841 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1842 rule_nr = 0;
1843 for (r = 0; r < s->nb_streams; r++) {
1844 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1845 if (s->streams[r]->discard != AVDISCARD_ALL) {
1846 if (!first)
1847 av_strlcat(rt->last_subscription, ",",
1848 sizeof(rt->last_subscription));
1849 ff_rdt_subscribe_rule(
1850 rt->last_subscription,
1851 sizeof(rt->last_subscription), i, rule_nr);
1852 first = 0;
1853 }
1854 rule_nr++;
1855 }
1856 }
1857 }
1858 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1859 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1860 cmd, reply, NULL);
1861 if (reply->status_code != RTSP_STATUS_OK)
1862 return AVERROR_INVALIDDATA;
1863 rt->need_subscription = 0;
1864
1865 if (rt->state == RTSP_STATE_STREAMING)
1866 rtsp_read_play (s);
1867 }
1868 }
1869
1870 ret = rtsp_fetch_packet(s, pkt);
1871 if (ret < 0)
1872 return ret;
1873
1874 /* send dummy request to keep TCP connection alive */
1875 if ((rt->server_type == RTSP_SERVER_WMS ||
1876 rt->server_type == RTSP_SERVER_REAL) &&
1877 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1878 if (rt->server_type == RTSP_SERVER_WMS) {
1879 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
1880 } else {
1881 ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
1882 }
1883 }
1884
1885 return 0;
1886 }
1887
1888 /* pause the stream */
1889 static int rtsp_read_pause(AVFormatContext *s)
1890 {
1891 RTSPState *rt = s->priv_data;
1892 RTSPMessageHeader reply1, *reply = &reply1;
1893
1894 rt = s->priv_data;
1895
1896 if (rt->state != RTSP_STATE_STREAMING)
1897 return 0;
1898 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1899 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
1900 if (reply->status_code != RTSP_STATUS_OK) {
1901 return -1;
1902 }
1903 }
1904 rt->state = RTSP_STATE_PAUSED;
1905 return 0;
1906 }
1907
1908 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1909 int64_t timestamp, int flags)
1910 {
1911 RTSPState *rt = s->priv_data;
1912
1913 rt->seek_timestamp = av_rescale_q(timestamp,
1914 s->streams[stream_index]->time_base,
1915 AV_TIME_BASE_Q);
1916 switch(rt->state) {
1917 default:
1918 case RTSP_STATE_IDLE:
1919 break;
1920 case RTSP_STATE_STREAMING:
1921 if (rtsp_read_pause(s) != 0)
1922 return -1;
1923 rt->state = RTSP_STATE_SEEKING;
1924 if (rtsp_read_play(s) != 0)
1925 return -1;
1926 break;
1927 case RTSP_STATE_PAUSED:
1928 rt->state = RTSP_STATE_IDLE;
1929 break;
1930 }
1931 return 0;
1932 }
1933
1934 static int rtsp_read_close(AVFormatContext *s)
1935 {
1936 RTSPState *rt = s->priv_data;
1937
1938 #if 0
1939 /* NOTE: it is valid to flush the buffer here */
1940 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1941 url_fclose(&rt->rtsp_gb);
1942 }
1943 #endif
1944 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
1945
1946 ff_rtsp_close_streams(s);
1947 url_close(rt->rtsp_hd);
1948 ff_network_close();
1949 return 0;
1950 }
1951
1952 AVInputFormat rtsp_demuxer = {
1953 "rtsp",
1954 NULL_IF_CONFIG_SMALL("RTSP input format"),
1955 sizeof(RTSPState),
1956 rtsp_probe,
1957 rtsp_read_header,
1958 rtsp_read_packet,
1959 rtsp_read_close,
1960 rtsp_read_seek,
1961 .flags = AVFMT_NOFILE,
1962 .read_play = rtsp_read_play,
1963 .read_pause = rtsp_read_pause,
1964 };
1965 #endif
1966
1967 static int sdp_probe(AVProbeData *p1)
1968 {
1969 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1970
1971 /* we look for a line beginning "c=IN IP4" */
1972 while (p < p_end && *p != '\0') {
1973 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1974 av_strstart(p, "c=IN IP4", NULL))
1975 return AVPROBE_SCORE_MAX / 2;
1976
1977 while (p < p_end - 1 && *p != '\n') p++;
1978 if (++p >= p_end)
1979 break;
1980 if (*p == '\r')
1981 p++;
1982 }
1983 return 0;
1984 }
1985
1986 #define SDP_MAX_SIZE 8192
1987
1988 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1989 {
1990 RTSPState *rt = s->priv_data;
1991 RTSPStream *rtsp_st;
1992 int size, i, err;
1993 char *content;
1994 char url[1024];
1995
1996 if (!ff_network_init())
1997 return AVERROR(EIO);
1998
1999 /* read the whole sdp file */
2000 /* XXX: better loading */
2001 content = av_malloc(SDP_MAX_SIZE);
2002 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
2003 if (size <= 0) {
2004 av_free(content);
2005 return AVERROR_INVALIDDATA;
2006 }
2007 content[size] ='\0';
2008
2009 sdp_parse(s, content);
2010 av_free(content);
2011
2012 /* open each RTP stream */
2013 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2014 rtsp_st = rt->rtsp_streams[i];
2015
2016 ff_url_join(url, sizeof(url), "rtp", NULL,
2017 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
2018 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
2019 rtsp_st->sdp_ttl);
2020 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
2021 err = AVERROR_INVALIDDATA;
2022 goto fail;
2023 }
2024 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
2025 goto fail;
2026 }
2027 return 0;
2028 fail:
2029 ff_rtsp_close_streams(s);
2030 ff_network_close();
2031 return err;
2032 }
2033
2034 static int sdp_read_close(AVFormatContext *s)
2035 {
2036 ff_rtsp_close_streams(s);
2037 ff_network_close();
2038 return 0;
2039 }
2040
2041 AVInputFormat sdp_demuxer = {
2042 "sdp",
2043 NULL_IF_CONFIG_SMALL("SDP"),
2044 sizeof(RTSPState),
2045 sdp_probe,
2046 sdp_read_header,
2047 rtsp_fetch_packet,
2048 sdp_read_close,
2049 };