Add support for TCP as lower transport in the RTSP muxer
[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 av_freep(&rt->auth_b64);
616 }
617
618 static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
619 URLContext *handle)
620 {
621 RTSPState *rt = s->priv_data;
622 AVFormatContext *rtpctx;
623 int ret;
624 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
625
626 if (!rtp_format)
627 return NULL;
628
629 /* Allocate an AVFormatContext for each output stream */
630 rtpctx = avformat_alloc_context();
631 if (!rtpctx)
632 return NULL;
633
634 rtpctx->oformat = rtp_format;
635 if (!av_new_stream(rtpctx, 0)) {
636 av_free(rtpctx);
637 return NULL;
638 }
639 /* Copy the max delay setting; the rtp muxer reads this. */
640 rtpctx->max_delay = s->max_delay;
641 /* Copy other stream parameters. */
642 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
643
644 /* Set the synchronized start time. */
645 rtpctx->start_time_realtime = rt->start_time;
646
647 /* Remove the local codec, link to the original codec
648 * context instead, to give the rtp muxer access to
649 * codec parameters. */
650 av_free(rtpctx->streams[0]->codec);
651 rtpctx->streams[0]->codec = st->codec;
652
653 if (handle) {
654 url_fdopen(&rtpctx->pb, handle);
655 } else
656 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
657 ret = av_write_header(rtpctx);
658
659 if (ret) {
660 if (handle) {
661 url_fclose(rtpctx->pb);
662 } else {
663 uint8_t *ptr;
664 url_close_dyn_buf(rtpctx->pb, &ptr);
665 av_free(ptr);
666 }
667 av_free(rtpctx->streams[0]);
668 av_free(rtpctx);
669 return NULL;
670 }
671
672 /* Copy the RTP AVStream timebase back to the original AVStream */
673 st->time_base = rtpctx->streams[0]->time_base;
674 return rtpctx;
675 }
676
677 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
678 {
679 RTSPState *rt = s->priv_data;
680 AVStream *st = NULL;
681
682 /* open the RTP context */
683 if (rtsp_st->stream_index >= 0)
684 st = s->streams[rtsp_st->stream_index];
685 if (!st)
686 s->ctx_flags |= AVFMTCTX_NOHEADER;
687
688 if (s->oformat) {
689 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
690 /* Ownage of rtp_handle is passed to the rtp mux context */
691 rtsp_st->rtp_handle = NULL;
692 } else if (rt->transport == RTSP_TRANSPORT_RDT)
693 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
694 rtsp_st->dynamic_protocol_context,
695 rtsp_st->dynamic_handler);
696 else
697 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
698 rtsp_st->sdp_payload_type,
699 &rtsp_st->rtp_payload_data);
700
701 if (!rtsp_st->transport_priv) {
702 return AVERROR(ENOMEM);
703 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
704 if (rtsp_st->dynamic_handler) {
705 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
706 rtsp_st->dynamic_protocol_context,
707 rtsp_st->dynamic_handler);
708 }
709 }
710
711 return 0;
712 }
713
714 #if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
715 static int rtsp_probe(AVProbeData *p)
716 {
717 if (av_strstart(p->filename, "rtsp:", NULL))
718 return AVPROBE_SCORE_MAX;
719 return 0;
720 }
721
722 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
723 {
724 const char *p;
725 int v;
726
727 p = *pp;
728 skip_spaces(&p);
729 v = strtol(p, (char **)&p, 10);
730 if (*p == '-') {
731 p++;
732 *min_ptr = v;
733 v = strtol(p, (char **)&p, 10);
734 *max_ptr = v;
735 } else {
736 *min_ptr = v;
737 *max_ptr = v;
738 }
739 *pp = p;
740 }
741
742 /* XXX: only one transport specification is parsed */
743 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
744 {
745 char transport_protocol[16];
746 char profile[16];
747 char lower_transport[16];
748 char parameter[16];
749 RTSPTransportField *th;
750 char buf[256];
751
752 reply->nb_transports = 0;
753
754 for (;;) {
755 skip_spaces(&p);
756 if (*p == '\0')
757 break;
758
759 th = &reply->transports[reply->nb_transports];
760
761 get_word_sep(transport_protocol, sizeof(transport_protocol),
762 "/", &p);
763 if (!strcasecmp (transport_protocol, "rtp")) {
764 get_word_sep(profile, sizeof(profile), "/;,", &p);
765 lower_transport[0] = '\0';
766 /* rtp/avp/<protocol> */
767 if (*p == '/') {
768 get_word_sep(lower_transport, sizeof(lower_transport),
769 ";,", &p);
770 }
771 th->transport = RTSP_TRANSPORT_RTP;
772 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
773 !strcasecmp (transport_protocol, "x-real-rdt")) {
774 /* x-pn-tng/<protocol> */
775 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
776 profile[0] = '\0';
777 th->transport = RTSP_TRANSPORT_RDT;
778 }
779 if (!strcasecmp(lower_transport, "TCP"))
780 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
781 else
782 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
783
784 if (*p == ';')
785 p++;
786 /* get each parameter */
787 while (*p != '\0' && *p != ',') {
788 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
789 if (!strcmp(parameter, "port")) {
790 if (*p == '=') {
791 p++;
792 rtsp_parse_range(&th->port_min, &th->port_max, &p);
793 }
794 } else if (!strcmp(parameter, "client_port")) {
795 if (*p == '=') {
796 p++;
797 rtsp_parse_range(&th->client_port_min,
798 &th->client_port_max, &p);
799 }
800 } else if (!strcmp(parameter, "server_port")) {
801 if (*p == '=') {
802 p++;
803 rtsp_parse_range(&th->server_port_min,
804 &th->server_port_max, &p);
805 }
806 } else if (!strcmp(parameter, "interleaved")) {
807 if (*p == '=') {
808 p++;
809 rtsp_parse_range(&th->interleaved_min,
810 &th->interleaved_max, &p);
811 }
812 } else if (!strcmp(parameter, "multicast")) {
813 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
814 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
815 } else if (!strcmp(parameter, "ttl")) {
816 if (*p == '=') {
817 p++;
818 th->ttl = strtol(p, (char **)&p, 10);
819 }
820 } else if (!strcmp(parameter, "destination")) {
821 struct in_addr ipaddr;
822
823 if (*p == '=') {
824 p++;
825 get_word_sep(buf, sizeof(buf), ";,", &p);
826 if (ff_inet_aton(buf, &ipaddr))
827 th->destination = ntohl(ipaddr.s_addr);
828 }
829 }
830 while (*p != ';' && *p != '\0' && *p != ',')
831 p++;
832 if (*p == ';')
833 p++;
834 }
835 if (*p == ',')
836 p++;
837
838 reply->nb_transports++;
839 }
840 }
841
842 void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
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 }
876 }
877
878 /* skip a RTP/TCP interleaved packet */
879 void ff_rtsp_skip_packet(AVFormatContext *s)
880 {
881 RTSPState *rt = s->priv_data;
882 int ret, len, len1;
883 uint8_t buf[1024];
884
885 ret = url_read_complete(rt->rtsp_hd, buf, 3);
886 if (ret != 3)
887 return;
888 len = AV_RB16(buf + 1);
889
890 dprintf(s, "skipping RTP packet len=%d\n", len);
891
892 /* skip payload */
893 while (len > 0) {
894 len1 = len;
895 if (len1 > sizeof(buf))
896 len1 = sizeof(buf);
897 ret = url_read_complete(rt->rtsp_hd, buf, len1);
898 if (ret != len1)
899 return;
900 len -= len1;
901 }
902 }
903
904 int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
905 unsigned char **content_ptr,
906 int return_on_interleaved_data)
907 {
908 RTSPState *rt = s->priv_data;
909 char buf[4096], buf1[1024], *q;
910 unsigned char ch;
911 const char *p;
912 int ret, content_length, line_count = 0;
913 unsigned char *content = NULL;
914
915 memset(reply, 0, sizeof(*reply));
916
917 /* parse reply (XXX: use buffers) */
918 rt->last_reply[0] = '\0';
919 for (;;) {
920 q = buf;
921 for (;;) {
922 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
923 #ifdef DEBUG_RTP_TCP
924 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
925 #endif
926 if (ret != 1)
927 return -1;
928 if (ch == '\n')
929 break;
930 if (ch == '$') {
931 /* XXX: only parse it if first char on line ? */
932 if (return_on_interleaved_data) {
933 return 1;
934 } else
935 ff_rtsp_skip_packet(s);
936 } else if (ch != '\r') {
937 if ((q - buf) < sizeof(buf) - 1)
938 *q++ = ch;
939 }
940 }
941 *q = '\0';
942
943 dprintf(s, "line='%s'\n", buf);
944
945 /* test if last line */
946 if (buf[0] == '\0')
947 break;
948 p = buf;
949 if (line_count == 0) {
950 /* get reply code */
951 get_word(buf1, sizeof(buf1), &p);
952 get_word(buf1, sizeof(buf1), &p);
953 reply->status_code = atoi(buf1);
954 } else {
955 ff_rtsp_parse_line(reply, p);
956 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
957 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
958 }
959 line_count++;
960 }
961
962 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
963 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
964
965 content_length = reply->content_length;
966 if (content_length > 0) {
967 /* leave some room for a trailing '\0' (useful for simple parsing) */
968 content = av_malloc(content_length + 1);
969 (void)url_read_complete(rt->rtsp_hd, content, content_length);
970 content[content_length] = '\0';
971 }
972 if (content_ptr)
973 *content_ptr = content;
974 else
975 av_free(content);
976
977 /* EOS */
978 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
979 reply->notice == 2104 /* Start-of-Stream Reached */ ||
980 reply->notice == 2306 /* Continuous Feed Terminated */) {
981 rt->state = RTSP_STATE_IDLE;
982 } else if (reply->notice >= 4400 && reply->notice < 5500) {
983 return AVERROR(EIO); /* data or server error */
984 } else if (reply->notice == 2401 /* Ticket Expired */ ||
985 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
986 return AVERROR(EPERM);
987
988 return 0;
989 }
990
991 void ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
992 const char *cmd,
993 const unsigned char *send_content,
994 int send_content_length)
995 {
996 RTSPState *rt = s->priv_data;
997 char buf[4096], buf1[1024];
998
999 rt->seq++;
1000 av_strlcpy(buf, cmd, sizeof(buf));
1001 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1002 av_strlcat(buf, buf1, sizeof(buf));
1003 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
1004 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
1005 av_strlcat(buf, buf1, sizeof(buf));
1006 }
1007 if (rt->auth_b64)
1008 av_strlcatf(buf, sizeof(buf),
1009 "Authorization: Basic %s\r\n",
1010 rt->auth_b64);
1011 if (send_content_length > 0 && send_content)
1012 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
1013 av_strlcat(buf, "\r\n", sizeof(buf));
1014
1015 dprintf(s, "Sending:\n%s--\n", buf);
1016
1017 url_write(rt->rtsp_hd, buf, strlen(buf));
1018 if (send_content_length > 0 && send_content)
1019 url_write(rt->rtsp_hd, send_content, send_content_length);
1020 rt->last_cmd_time = av_gettime();
1021 }
1022
1023 void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
1024 {
1025 ff_rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
1026 }
1027
1028 void ff_rtsp_send_cmd(AVFormatContext *s,
1029 const char *cmd, RTSPMessageHeader *reply,
1030 unsigned char **content_ptr)
1031 {
1032 ff_rtsp_send_cmd_async(s, cmd);
1033
1034 ff_rtsp_read_reply(s, reply, content_ptr, 0);
1035 }
1036
1037 void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
1038 const char *cmd,
1039 RTSPMessageHeader *reply,
1040 unsigned char **content_ptr,
1041 const unsigned char *send_content,
1042 int send_content_length)
1043 {
1044 ff_rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
1045
1046 ff_rtsp_read_reply(s, reply, content_ptr, 0);
1047 }
1048
1049 /**
1050 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1051 */
1052 static int make_setup_request(AVFormatContext *s, const char *host, int port,
1053 int lower_transport, const char *real_challenge)
1054 {
1055 RTSPState *rt = s->priv_data;
1056 int rtx, j, i, err, interleave = 0;
1057 RTSPStream *rtsp_st;
1058 RTSPMessageHeader reply1, *reply = &reply1;
1059 char cmd[2048];
1060 const char *trans_pref;
1061
1062 if (rt->transport == RTSP_TRANSPORT_RDT)
1063 trans_pref = "x-pn-tng";
1064 else
1065 trans_pref = "RTP/AVP";
1066
1067 /* default timeout: 1 minute */
1068 rt->timeout = 60;
1069
1070 /* for each stream, make the setup request */
1071 /* XXX: we assume the same server is used for the control of each
1072 * RTSP stream */
1073
1074 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1075 char transport[2048];
1076
1077 /**
1078 * WMS serves all UDP data over a single connection, the RTX, which
1079 * isn't necessarily the first in the SDP but has to be the first
1080 * to be set up, else the second/third SETUP will fail with a 461.
1081 */
1082 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1083 rt->server_type == RTSP_SERVER_WMS) {
1084 if (i == 0) {
1085 /* rtx first */
1086 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1087 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1088 if (len >= 4 &&
1089 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1090 "/rtx"))
1091 break;
1092 }
1093 if (rtx == rt->nb_rtsp_streams)
1094 return -1; /* no RTX found */
1095 rtsp_st = rt->rtsp_streams[rtx];
1096 } else
1097 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1098 } else
1099 rtsp_st = rt->rtsp_streams[i];
1100
1101 /* RTP/UDP */
1102 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1103 char buf[256];
1104
1105 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1106 port = reply->transports[0].client_port_min;
1107 goto have_port;
1108 }
1109
1110 /* first try in specified port range */
1111 if (RTSP_RTP_PORT_MIN != 0) {
1112 while (j <= RTSP_RTP_PORT_MAX) {
1113 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1114 "?localport=%d", j);
1115 /* we will use two ports per rtp stream (rtp and rtcp) */
1116 j += 2;
1117 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1118 goto rtp_opened;
1119 }
1120 }
1121
1122 #if 0
1123 /* then try on any port */
1124 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1125 err = AVERROR_INVALIDDATA;
1126 goto fail;
1127 }
1128 #endif
1129
1130 rtp_opened:
1131 port = rtp_get_local_port(rtsp_st->rtp_handle);
1132 have_port:
1133 snprintf(transport, sizeof(transport) - 1,
1134 "%s/UDP;", trans_pref);
1135 if (rt->server_type != RTSP_SERVER_REAL)
1136 av_strlcat(transport, "unicast;", sizeof(transport));
1137 av_strlcatf(transport, sizeof(transport),
1138 "client_port=%d", port);
1139 if (rt->transport == RTSP_TRANSPORT_RTP &&
1140 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1141 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1142 }
1143
1144 /* RTP/TCP */
1145 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1146 /** For WMS streams, the application streams are only used for
1147 * UDP. When trying to set it up for TCP streams, the server
1148 * will return an error. Therefore, we skip those streams. */
1149 if (rt->server_type == RTSP_SERVER_WMS &&
1150 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1151 CODEC_TYPE_DATA)
1152 continue;
1153 snprintf(transport, sizeof(transport) - 1,
1154 "%s/TCP;", trans_pref);
1155 if (rt->server_type == RTSP_SERVER_WMS)
1156 av_strlcat(transport, "unicast;", sizeof(transport));
1157 av_strlcatf(transport, sizeof(transport),
1158 "interleaved=%d-%d",
1159 interleave, interleave + 1);
1160 interleave += 2;
1161 }
1162
1163 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1164 snprintf(transport, sizeof(transport) - 1,
1165 "%s/UDP;multicast", trans_pref);
1166 }
1167 if (s->oformat) {
1168 av_strlcat(transport, ";mode=receive", sizeof(transport));
1169 } else if (rt->server_type == RTSP_SERVER_REAL ||
1170 rt->server_type == RTSP_SERVER_WMS)
1171 av_strlcat(transport, ";mode=play", sizeof(transport));
1172 snprintf(cmd, sizeof(cmd),
1173 "SETUP %s RTSP/1.0\r\n"
1174 "Transport: %s\r\n",
1175 rtsp_st->control_url, transport);
1176 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1177 char real_res[41], real_csum[9];
1178 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1179 real_challenge);
1180 av_strlcatf(cmd, sizeof(cmd),
1181 "If-Match: %s\r\n"
1182 "RealChallenge2: %s, sd=%s\r\n",
1183 rt->session_id, real_res, real_csum);
1184 }
1185 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1186 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1187 err = 1;
1188 goto fail;
1189 } else if (reply->status_code != RTSP_STATUS_OK ||
1190 reply->nb_transports != 1) {
1191 err = AVERROR_INVALIDDATA;
1192 goto fail;
1193 }
1194
1195 /* XXX: same protocol for all streams is required */
1196 if (i > 0) {
1197 if (reply->transports[0].lower_transport != rt->lower_transport ||
1198 reply->transports[0].transport != rt->transport) {
1199 err = AVERROR_INVALIDDATA;
1200 goto fail;
1201 }
1202 } else {
1203 rt->lower_transport = reply->transports[0].lower_transport;
1204 rt->transport = reply->transports[0].transport;
1205 }
1206
1207 /* close RTP connection if not choosen */
1208 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1209 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1210 url_close(rtsp_st->rtp_handle);
1211 rtsp_st->rtp_handle = NULL;
1212 }
1213
1214 switch(reply->transports[0].lower_transport) {
1215 case RTSP_LOWER_TRANSPORT_TCP:
1216 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1217 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1218 break;
1219
1220 case RTSP_LOWER_TRANSPORT_UDP: {
1221 char url[1024];
1222
1223 /* XXX: also use address if specified */
1224 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1225 reply->transports[0].server_port_min, NULL);
1226 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1227 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1228 err = AVERROR_INVALIDDATA;
1229 goto fail;
1230 }
1231 /* Try to initialize the connection state in a
1232 * potential NAT router by sending dummy packets.
1233 * RTP/RTCP dummy packets are used for RDT, too.
1234 */
1235 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
1236 rtp_send_punch_packets(rtsp_st->rtp_handle);
1237 break;
1238 }
1239 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1240 char url[1024];
1241 struct in_addr in;
1242 int port, ttl;
1243
1244 if (reply->transports[0].destination) {
1245 in.s_addr = htonl(reply->transports[0].destination);
1246 port = reply->transports[0].port_min;
1247 ttl = reply->transports[0].ttl;
1248 } else {
1249 in = rtsp_st->sdp_ip;
1250 port = rtsp_st->sdp_port;
1251 ttl = rtsp_st->sdp_ttl;
1252 }
1253 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1254 port, "?ttl=%d", ttl);
1255 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1256 err = AVERROR_INVALIDDATA;
1257 goto fail;
1258 }
1259 break;
1260 }
1261 }
1262
1263 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1264 goto fail;
1265 }
1266
1267 if (reply->timeout > 0)
1268 rt->timeout = reply->timeout;
1269
1270 if (rt->server_type == RTSP_SERVER_REAL)
1271 rt->need_subscription = 1;
1272
1273 return 0;
1274
1275 fail:
1276 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1277 if (rt->rtsp_streams[i]->rtp_handle) {
1278 url_close(rt->rtsp_streams[i]->rtp_handle);
1279 rt->rtsp_streams[i]->rtp_handle = NULL;
1280 }
1281 }
1282 return err;
1283 }
1284
1285 static int rtsp_read_play(AVFormatContext *s)
1286 {
1287 RTSPState *rt = s->priv_data;
1288 RTSPMessageHeader reply1, *reply = &reply1;
1289 char cmd[1024];
1290
1291 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1292
1293 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1294 if (rt->state == RTSP_STATE_PAUSED) {
1295 snprintf(cmd, sizeof(cmd),
1296 "PLAY %s RTSP/1.0\r\n",
1297 rt->control_uri);
1298 } else {
1299 snprintf(cmd, sizeof(cmd),
1300 "PLAY %s RTSP/1.0\r\n"
1301 "Range: npt=%0.3f-\r\n",
1302 rt->control_uri,
1303 (double)rt->seek_timestamp / AV_TIME_BASE);
1304 }
1305 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1306 if (reply->status_code != RTSP_STATUS_OK) {
1307 return -1;
1308 }
1309 }
1310 rt->state = RTSP_STATE_STREAMING;
1311 return 0;
1312 }
1313
1314 static int rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
1315 {
1316 RTSPState *rt = s->priv_data;
1317 char cmd[1024];
1318 unsigned char *content = NULL;
1319 int ret;
1320
1321 /* describe the stream */
1322 snprintf(cmd, sizeof(cmd),
1323 "DESCRIBE %s RTSP/1.0\r\n"
1324 "Accept: application/sdp\r\n",
1325 rt->control_uri);
1326 if (rt->server_type == RTSP_SERVER_REAL) {
1327 /**
1328 * The Require: attribute is needed for proper streaming from
1329 * Realmedia servers.
1330 */
1331 av_strlcat(cmd,
1332 "Require: com.real.retain-entity-for-setup\r\n",
1333 sizeof(cmd));
1334 }
1335 ff_rtsp_send_cmd(s, cmd, reply, &content);
1336 if (!content)
1337 return AVERROR_INVALIDDATA;
1338 if (reply->status_code != RTSP_STATUS_OK) {
1339 av_freep(&content);
1340 return AVERROR_INVALIDDATA;
1341 }
1342
1343 /* now we got the SDP description, we parse it */
1344 ret = sdp_parse(s, (const char *)content);
1345 av_freep(&content);
1346 if (ret < 0)
1347 return AVERROR_INVALIDDATA;
1348
1349 return 0;
1350 }
1351
1352 static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
1353 {
1354 RTSPState *rt = s->priv_data;
1355 RTSPMessageHeader reply1, *reply = &reply1;
1356 char cmd[1024];
1357 int i;
1358 char *sdp;
1359 AVFormatContext sdp_ctx, *ctx_array[1];
1360
1361 rt->start_time = av_gettime();
1362
1363 /* Announce the stream */
1364 snprintf(cmd, sizeof(cmd),
1365 "ANNOUNCE %s RTSP/1.0\r\n"
1366 "Content-Type: application/sdp\r\n",
1367 rt->control_uri);
1368 sdp = av_mallocz(8192);
1369 if (sdp == NULL)
1370 return AVERROR(ENOMEM);
1371 /* We create the SDP based on the RTSP AVFormatContext where we
1372 * aren't allowed to change the filename field. (We create the SDP
1373 * based on the RTSP context since the contexts for the RTP streams
1374 * don't exist yet.) In order to specify a custom URL with the actual
1375 * peer IP instead of the originally specified hostname, we create
1376 * a temporary copy of the AVFormatContext, where the custom URL is set.
1377 *
1378 * FIXME: Create the SDP without copying the AVFormatContext.
1379 * This either requires setting up the RTP stream AVFormatContexts
1380 * already here (complicating things immensely) or getting a more
1381 * flexible SDP creation interface.
1382 */
1383 sdp_ctx = *s;
1384 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1385 "rtsp", NULL, addr, -1, NULL);
1386 ctx_array[0] = &sdp_ctx;
1387 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
1388 av_free(sdp);
1389 return AVERROR_INVALIDDATA;
1390 }
1391 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
1392 ff_rtsp_send_cmd_with_content(s, cmd, reply, NULL, sdp, strlen(sdp));
1393 av_free(sdp);
1394 if (reply->status_code != RTSP_STATUS_OK)
1395 return AVERROR_INVALIDDATA;
1396
1397 /* Set up the RTSPStreams for each AVStream */
1398 for (i = 0; i < s->nb_streams; i++) {
1399 RTSPStream *rtsp_st;
1400 AVStream *st = s->streams[i];
1401
1402 rtsp_st = av_mallocz(sizeof(RTSPStream));
1403 if (!rtsp_st)
1404 return AVERROR(ENOMEM);
1405 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1406
1407 st->priv_data = rtsp_st;
1408 rtsp_st->stream_index = i;
1409
1410 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
1411 /* Note, this must match the relative uri set in the sdp content */
1412 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1413 "/streamid=%d", i);
1414 }
1415
1416 return 0;
1417 }
1418
1419 int ff_rtsp_connect(AVFormatContext *s)
1420 {
1421 RTSPState *rt = s->priv_data;
1422 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1423 char *option_list, *option, *filename;
1424 URLContext *rtsp_hd;
1425 int port, err, tcp_fd;
1426 RTSPMessageHeader reply1, *reply = &reply1;
1427 int lower_transport_mask = 0;
1428 char real_challenge[64];
1429 struct sockaddr_storage peer;
1430 socklen_t peer_len = sizeof(peer);
1431
1432 if (!ff_network_init())
1433 return AVERROR(EIO);
1434 redirect:
1435 /* extract hostname and port */
1436 ff_url_split(NULL, 0, auth, sizeof(auth),
1437 host, sizeof(host), &port, path, sizeof(path), s->filename);
1438 if (*auth) {
1439 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1440
1441 if (!(rt->auth_b64 = av_malloc(b64_len)))
1442 return AVERROR(ENOMEM);
1443 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1444 err = AVERROR(EINVAL);
1445 goto fail;
1446 }
1447 }
1448 if (port < 0)
1449 port = RTSP_DEFAULT_PORT;
1450
1451 /* search for options */
1452 option_list = strchr(path, '?');
1453 if (option_list) {
1454 filename = strchr(s->filename, '?');
1455 while (option_list) {
1456 /* move the option pointer */
1457 option = ++option_list;
1458 option_list = strchr(option_list, '&');
1459 if (option_list)
1460 *option_list = 0;
1461
1462 /* handle the options */
1463 if (!strcmp(option, "udp")) {
1464 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1465 } else if (!strcmp(option, "multicast")) {
1466 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1467 } else if (!strcmp(option, "tcp")) {
1468 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1469 } else {
1470 strcpy(++filename, option);
1471 filename += strlen(option);
1472 if (option_list) *filename = '&';
1473 }
1474 }
1475 *filename = 0;
1476 }
1477
1478 if (!lower_transport_mask)
1479 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1480
1481 if (s->oformat) {
1482 /* Only UDP or TCP - UDP multicast isn't supported. */
1483 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1484 (1 << RTSP_LOWER_TRANSPORT_TCP);
1485 if (!lower_transport_mask) {
1486 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1487 "only UDP and TCP are supported for output.\n");
1488 err = AVERROR(EINVAL);
1489 goto fail;
1490 }
1491 }
1492
1493 /* open the tcp connexion */
1494 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
1495 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1496 err = AVERROR(EIO);
1497 goto fail;
1498 }
1499 rt->rtsp_hd = rtsp_hd;
1500 rt->seq = 0;
1501
1502 tcp_fd = url_get_file_handle(rtsp_hd);
1503 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1504 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1505 NULL, 0, NI_NUMERICHOST);
1506 }
1507
1508 /* request options supported by the server; this also detects server
1509 * type */
1510 av_strlcpy(rt->control_uri, s->filename,
1511 sizeof(rt->control_uri));
1512 for (rt->server_type = RTSP_SERVER_RTP;;) {
1513 snprintf(cmd, sizeof(cmd),
1514 "OPTIONS %s RTSP/1.0\r\n", rt->control_uri);
1515 if (rt->server_type == RTSP_SERVER_REAL)
1516 av_strlcat(cmd,
1517 /**
1518 * The following entries are required for proper
1519 * streaming from a Realmedia server. They are
1520 * interdependent in some way although we currently
1521 * don't quite understand how. Values were copied
1522 * from mplayer SVN r23589.
1523 * @param CompanyID is a 16-byte ID in base64
1524 * @param ClientChallenge is a 16-byte ID in hex
1525 */
1526 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1527 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1528 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1529 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1530 sizeof(cmd));
1531 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1532 if (reply->status_code != RTSP_STATUS_OK) {
1533 err = AVERROR_INVALIDDATA;
1534 goto fail;
1535 }
1536
1537 /* detect server type if not standard-compliant RTP */
1538 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1539 rt->server_type = RTSP_SERVER_REAL;
1540 continue;
1541 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1542 rt->server_type = RTSP_SERVER_WMS;
1543 } else if (rt->server_type == RTSP_SERVER_REAL)
1544 strcpy(real_challenge, reply->real_challenge);
1545 break;
1546 }
1547
1548 if (s->iformat)
1549 err = rtsp_setup_input_streams(s, reply);
1550 else
1551 err = rtsp_setup_output_streams(s, host);
1552 if (err)
1553 goto fail;
1554
1555 do {
1556 int lower_transport = ff_log2_tab[lower_transport_mask &
1557 ~(lower_transport_mask - 1)];
1558
1559 err = make_setup_request(s, host, port, lower_transport,
1560 rt->server_type == RTSP_SERVER_REAL ?
1561 real_challenge : NULL);
1562 if (err < 0)
1563 goto fail;
1564 lower_transport_mask &= ~(1 << lower_transport);
1565 if (lower_transport_mask == 0 && err == 1) {
1566 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1567 goto fail;
1568 }
1569 } while (err);
1570
1571 rt->state = RTSP_STATE_IDLE;
1572 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1573 return 0;
1574 fail:
1575 ff_rtsp_close_streams(s);
1576 url_close(rt->rtsp_hd);
1577 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
1578 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1579 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1580 reply->status_code,
1581 s->filename);
1582 goto redirect;
1583 }
1584 ff_network_close();
1585 return err;
1586 }
1587 #endif
1588
1589 #if CONFIG_RTSP_DEMUXER
1590 static int rtsp_read_header(AVFormatContext *s,
1591 AVFormatParameters *ap)
1592 {
1593 RTSPState *rt = s->priv_data;
1594 int ret;
1595
1596 ret = ff_rtsp_connect(s);
1597 if (ret)
1598 return ret;
1599
1600 if (ap->initial_pause) {
1601 /* do not start immediately */
1602 } else {
1603 if (rtsp_read_play(s) < 0) {
1604 ff_rtsp_close_streams(s);
1605 url_close(rt->rtsp_hd);
1606 return AVERROR_INVALIDDATA;
1607 }
1608 }
1609
1610 return 0;
1611 }
1612
1613 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1614 uint8_t *buf, int buf_size)
1615 {
1616 RTSPState *rt = s->priv_data;
1617 RTSPStream *rtsp_st;
1618 fd_set rfds;
1619 int fd, fd_max, n, i, ret, tcp_fd;
1620 struct timeval tv;
1621
1622 for (;;) {
1623 if (url_interrupt_cb())
1624 return AVERROR(EINTR);
1625 FD_ZERO(&rfds);
1626 if (rt->rtsp_hd) {
1627 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1628 FD_SET(tcp_fd, &rfds);
1629 } else {
1630 fd_max = 0;
1631 tcp_fd = -1;
1632 }
1633 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1634 rtsp_st = rt->rtsp_streams[i];
1635 if (rtsp_st->rtp_handle) {
1636 /* currently, we cannot probe RTCP handle because of
1637 * blocking restrictions */
1638 fd = url_get_file_handle(rtsp_st->rtp_handle);
1639 if (fd > fd_max)
1640 fd_max = fd;
1641 FD_SET(fd, &rfds);
1642 }
1643 }
1644 tv.tv_sec = 0;
1645 tv.tv_usec = 100 * 1000;
1646 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1647 if (n > 0) {
1648 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1649 rtsp_st = rt->rtsp_streams[i];
1650 if (rtsp_st->rtp_handle) {
1651 fd = url_get_file_handle(rtsp_st->rtp_handle);
1652 if (FD_ISSET(fd, &rfds)) {
1653 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1654 if (ret > 0) {
1655 *prtsp_st = rtsp_st;
1656 return ret;
1657 }
1658 }
1659 }
1660 }
1661 #if CONFIG_RTSP_DEMUXER
1662 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
1663 RTSPMessageHeader reply;
1664
1665 ff_rtsp_read_reply(s, &reply, NULL, 0);
1666 /* XXX: parse message */
1667 if (rt->state != RTSP_STATE_STREAMING)
1668 return 0;
1669 }
1670 #endif
1671 }
1672 }
1673 }
1674
1675 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1676 uint8_t *buf, int buf_size)
1677 {
1678 RTSPState *rt = s->priv_data;
1679 int id, len, i, ret;
1680 RTSPStream *rtsp_st;
1681
1682 #ifdef DEBUG_RTP_TCP
1683 dprintf(s, "tcp_read_packet:\n");
1684 #endif
1685 redo:
1686 for (;;) {
1687 RTSPMessageHeader reply;
1688
1689 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
1690 if (ret == -1)
1691 return -1;
1692 if (ret == 1) /* received '$' */
1693 break;
1694 /* XXX: parse message */
1695 if (rt->state != RTSP_STATE_STREAMING)
1696 return 0;
1697 }
1698 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1699 if (ret != 3)
1700 return -1;
1701 id = buf[0];
1702 len = AV_RB16(buf + 1);
1703 #ifdef DEBUG_RTP_TCP
1704 dprintf(s, "id=%d len=%d\n", id, len);
1705 #endif
1706 if (len > buf_size || len < 12)
1707 goto redo;
1708 /* get the data */
1709 ret = url_read_complete(rt->rtsp_hd, buf, len);
1710 if (ret != len)
1711 return -1;
1712 if (rt->transport == RTSP_TRANSPORT_RDT &&
1713 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1714 return -1;
1715
1716 /* find the matching stream */
1717 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1718 rtsp_st = rt->rtsp_streams[i];
1719 if (id >= rtsp_st->interleaved_min &&
1720 id <= rtsp_st->interleaved_max)
1721 goto found;
1722 }
1723 goto redo;
1724 found:
1725 *prtsp_st = rtsp_st;
1726 return len;
1727 }
1728
1729 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1730 {
1731 RTSPState *rt = s->priv_data;
1732 int ret, len;
1733 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1734 RTSPStream *rtsp_st;
1735
1736 /* get next frames from the same RTP packet */
1737 if (rt->cur_transport_priv) {
1738 if (rt->transport == RTSP_TRANSPORT_RDT) {
1739 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1740 } else
1741 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1742 if (ret == 0) {
1743 rt->cur_transport_priv = NULL;
1744 return 0;
1745 } else if (ret == 1) {
1746 return 0;
1747 } else
1748 rt->cur_transport_priv = NULL;
1749 }
1750
1751 /* read next RTP packet */
1752 redo:
1753 switch(rt->lower_transport) {
1754 default:
1755 #if CONFIG_RTSP_DEMUXER
1756 case RTSP_LOWER_TRANSPORT_TCP:
1757 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1758 break;
1759 #endif
1760 case RTSP_LOWER_TRANSPORT_UDP:
1761 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1762 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1763 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1764 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1765 break;
1766 }
1767 if (len < 0)
1768 return len;
1769 if (len == 0)
1770 return AVERROR_EOF;
1771 if (rt->transport == RTSP_TRANSPORT_RDT) {
1772 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1773 } else
1774 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1775 if (ret < 0)
1776 goto redo;
1777 if (ret == 1)
1778 /* more packets may follow, so we save the RTP context */
1779 rt->cur_transport_priv = rtsp_st->transport_priv;
1780
1781 return ret;
1782 }
1783
1784 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1785 {
1786 RTSPState *rt = s->priv_data;
1787 int ret;
1788 RTSPMessageHeader reply1, *reply = &reply1;
1789 char cmd[1024];
1790
1791 if (rt->server_type == RTSP_SERVER_REAL) {
1792 int i;
1793 enum AVDiscard cache[MAX_STREAMS];
1794
1795 for (i = 0; i < s->nb_streams; i++)
1796 cache[i] = s->streams[i]->discard;
1797
1798 if (!rt->need_subscription) {
1799 if (memcmp (cache, rt->real_setup_cache,
1800 sizeof(enum AVDiscard) * s->nb_streams)) {
1801 snprintf(cmd, sizeof(cmd),
1802 "SET_PARAMETER %s RTSP/1.0\r\n"
1803 "Unsubscribe: %s\r\n",
1804 rt->control_uri, rt->last_subscription);
1805 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1806 if (reply->status_code != RTSP_STATUS_OK)
1807 return AVERROR_INVALIDDATA;
1808 rt->need_subscription = 1;
1809 }
1810 }
1811
1812 if (rt->need_subscription) {
1813 int r, rule_nr, first = 1;
1814
1815 memcpy(rt->real_setup_cache, cache,
1816 sizeof(enum AVDiscard) * s->nb_streams);
1817 rt->last_subscription[0] = 0;
1818
1819 snprintf(cmd, sizeof(cmd),
1820 "SET_PARAMETER %s RTSP/1.0\r\n"
1821 "Subscribe: ",
1822 rt->control_uri);
1823 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1824 rule_nr = 0;
1825 for (r = 0; r < s->nb_streams; r++) {
1826 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1827 if (s->streams[r]->discard != AVDISCARD_ALL) {
1828 if (!first)
1829 av_strlcat(rt->last_subscription, ",",
1830 sizeof(rt->last_subscription));
1831 ff_rdt_subscribe_rule(
1832 rt->last_subscription,
1833 sizeof(rt->last_subscription), i, rule_nr);
1834 first = 0;
1835 }
1836 rule_nr++;
1837 }
1838 }
1839 }
1840 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1841 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1842 if (reply->status_code != RTSP_STATUS_OK)
1843 return AVERROR_INVALIDDATA;
1844 rt->need_subscription = 0;
1845
1846 if (rt->state == RTSP_STATE_STREAMING)
1847 rtsp_read_play (s);
1848 }
1849 }
1850
1851 ret = rtsp_fetch_packet(s, pkt);
1852 if (ret < 0)
1853 return ret;
1854
1855 /* send dummy request to keep TCP connection alive */
1856 if ((rt->server_type == RTSP_SERVER_WMS ||
1857 rt->server_type == RTSP_SERVER_REAL) &&
1858 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1859 if (rt->server_type == RTSP_SERVER_WMS) {
1860 snprintf(cmd, sizeof(cmd) - 1,
1861 "GET_PARAMETER %s RTSP/1.0\r\n",
1862 rt->control_uri);
1863 ff_rtsp_send_cmd_async(s, cmd);
1864 } else {
1865 ff_rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
1866 }
1867 }
1868
1869 return 0;
1870 }
1871
1872 /* pause the stream */
1873 static int rtsp_read_pause(AVFormatContext *s)
1874 {
1875 RTSPState *rt = s->priv_data;
1876 RTSPMessageHeader reply1, *reply = &reply1;
1877 char cmd[1024];
1878
1879 rt = s->priv_data;
1880
1881 if (rt->state != RTSP_STATE_STREAMING)
1882 return 0;
1883 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1884 snprintf(cmd, sizeof(cmd),
1885 "PAUSE %s RTSP/1.0\r\n",
1886 rt->control_uri);
1887 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1888 if (reply->status_code != RTSP_STATUS_OK) {
1889 return -1;
1890 }
1891 }
1892 rt->state = RTSP_STATE_PAUSED;
1893 return 0;
1894 }
1895
1896 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1897 int64_t timestamp, int flags)
1898 {
1899 RTSPState *rt = s->priv_data;
1900
1901 rt->seek_timestamp = av_rescale_q(timestamp,
1902 s->streams[stream_index]->time_base,
1903 AV_TIME_BASE_Q);
1904 switch(rt->state) {
1905 default:
1906 case RTSP_STATE_IDLE:
1907 break;
1908 case RTSP_STATE_STREAMING:
1909 if (rtsp_read_pause(s) != 0)
1910 return -1;
1911 rt->state = RTSP_STATE_SEEKING;
1912 if (rtsp_read_play(s) != 0)
1913 return -1;
1914 break;
1915 case RTSP_STATE_PAUSED:
1916 rt->state = RTSP_STATE_IDLE;
1917 break;
1918 }
1919 return 0;
1920 }
1921
1922 static int rtsp_read_close(AVFormatContext *s)
1923 {
1924 RTSPState *rt = s->priv_data;
1925 char cmd[1024];
1926
1927 #if 0
1928 /* NOTE: it is valid to flush the buffer here */
1929 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1930 url_fclose(&rt->rtsp_gb);
1931 }
1932 #endif
1933 snprintf(cmd, sizeof(cmd),
1934 "TEARDOWN %s RTSP/1.0\r\n",
1935 rt->control_uri);
1936 ff_rtsp_send_cmd_async(s, cmd);
1937
1938 ff_rtsp_close_streams(s);
1939 url_close(rt->rtsp_hd);
1940 ff_network_close();
1941 return 0;
1942 }
1943
1944 AVInputFormat rtsp_demuxer = {
1945 "rtsp",
1946 NULL_IF_CONFIG_SMALL("RTSP input format"),
1947 sizeof(RTSPState),
1948 rtsp_probe,
1949 rtsp_read_header,
1950 rtsp_read_packet,
1951 rtsp_read_close,
1952 rtsp_read_seek,
1953 .flags = AVFMT_NOFILE,
1954 .read_play = rtsp_read_play,
1955 .read_pause = rtsp_read_pause,
1956 };
1957 #endif
1958
1959 static int sdp_probe(AVProbeData *p1)
1960 {
1961 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1962
1963 /* we look for a line beginning "c=IN IP4" */
1964 while (p < p_end && *p != '\0') {
1965 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1966 av_strstart(p, "c=IN IP4", NULL))
1967 return AVPROBE_SCORE_MAX / 2;
1968
1969 while (p < p_end - 1 && *p != '\n') p++;
1970 if (++p >= p_end)
1971 break;
1972 if (*p == '\r')
1973 p++;
1974 }
1975 return 0;
1976 }
1977
1978 #define SDP_MAX_SIZE 8192
1979
1980 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1981 {
1982 RTSPState *rt = s->priv_data;
1983 RTSPStream *rtsp_st;
1984 int size, i, err;
1985 char *content;
1986 char url[1024];
1987
1988 if (!ff_network_init())
1989 return AVERROR(EIO);
1990
1991 /* read the whole sdp file */
1992 /* XXX: better loading */
1993 content = av_malloc(SDP_MAX_SIZE);
1994 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1995 if (size <= 0) {
1996 av_free(content);
1997 return AVERROR_INVALIDDATA;
1998 }
1999 content[size] ='\0';
2000
2001 sdp_parse(s, content);
2002 av_free(content);
2003
2004 /* open each RTP stream */
2005 for (i = 0; i < rt->nb_rtsp_streams; i++) {
2006 rtsp_st = rt->rtsp_streams[i];
2007
2008 ff_url_join(url, sizeof(url), "rtp", NULL,
2009 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
2010 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
2011 rtsp_st->sdp_ttl);
2012 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
2013 err = AVERROR_INVALIDDATA;
2014 goto fail;
2015 }
2016 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
2017 goto fail;
2018 }
2019 return 0;
2020 fail:
2021 ff_rtsp_close_streams(s);
2022 ff_network_close();
2023 return err;
2024 }
2025
2026 static int sdp_read_close(AVFormatContext *s)
2027 {
2028 ff_rtsp_close_streams(s);
2029 ff_network_close();
2030 return 0;
2031 }
2032
2033 AVInputFormat sdp_demuxer = {
2034 "sdp",
2035 NULL_IF_CONFIG_SMALL("SDP"),
2036 sizeof(RTSPState),
2037 sdp_probe,
2038 sdp_read_header,
2039 rtsp_fetch_packet,
2040 sdp_read_close,
2041 };