88d15c3f4e94170b330f3d33d62e2accbb5a742b
[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 /* needed by inet_aton() */
23 #define _SVID_SOURCE
24
25 #include "libavutil/avstring.h"
26 #include "avformat.h"
27
28 #include <sys/time.h>
29 #include <unistd.h> /* for select() prototype */
30 #include <strings.h>
31 #include "network.h"
32 #include "rtsp.h"
33
34 #include "rtp_internal.h"
35
36 //#define DEBUG
37 //#define DEBUG_RTP_TCP
38
39 enum RTSPClientState {
40 RTSP_STATE_IDLE,
41 RTSP_STATE_PLAYING,
42 RTSP_STATE_PAUSED,
43 };
44
45 typedef struct RTSPState {
46 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
47 int nb_rtsp_streams;
48 struct RTSPStream **rtsp_streams;
49
50 enum RTSPClientState state;
51 int64_t seek_timestamp;
52
53 /* XXX: currently we use unbuffered input */
54 // ByteIOContext rtsp_gb;
55 int seq; /* RTSP command sequence number */
56 char session_id[512];
57 enum RTSPProtocol protocol;
58 char last_reply[2048]; /* XXX: allocate ? */
59 RTPDemuxContext *cur_rtp;
60 } RTSPState;
61
62 typedef struct RTSPStream {
63 URLContext *rtp_handle; /* RTP stream handle */
64 RTPDemuxContext *rtp_ctx; /* RTP parse context */
65
66 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
67 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
68 char control_url[1024]; /* url for this stream (from SDP) */
69
70 int sdp_port; /* port (from SDP content - not used in RTSP) */
71 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
72 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
73 int sdp_payload_type; /* payload type - only used in SDP */
74 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
75
76 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
77 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
78 } RTSPStream;
79
80 static int rtsp_read_play(AVFormatContext *s);
81
82 /* XXX: currently, the only way to change the protocols consists in
83 changing this variable */
84
85 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
86 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
87 #endif
88
89 static int rtsp_probe(AVProbeData *p)
90 {
91 if (av_strstart(p->filename, "rtsp:", NULL))
92 return AVPROBE_SCORE_MAX;
93 return 0;
94 }
95
96 static int redir_isspace(int c)
97 {
98 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
99 }
100
101 static void skip_spaces(const char **pp)
102 {
103 const char *p;
104 p = *pp;
105 while (redir_isspace(*p))
106 p++;
107 *pp = p;
108 }
109
110 static void get_word_sep(char *buf, int buf_size, const char *sep,
111 const char **pp)
112 {
113 const char *p;
114 char *q;
115
116 p = *pp;
117 if (*p == '/')
118 p++;
119 skip_spaces(&p);
120 q = buf;
121 while (!strchr(sep, *p) && *p != '\0') {
122 if ((q - buf) < buf_size - 1)
123 *q++ = *p;
124 p++;
125 }
126 if (buf_size > 0)
127 *q = '\0';
128 *pp = p;
129 }
130
131 static void get_word(char *buf, int buf_size, const char **pp)
132 {
133 const char *p;
134 char *q;
135
136 p = *pp;
137 skip_spaces(&p);
138 q = buf;
139 while (!redir_isspace(*p) && *p != '\0') {
140 if ((q - buf) < buf_size - 1)
141 *q++ = *p;
142 p++;
143 }
144 if (buf_size > 0)
145 *q = '\0';
146 *pp = p;
147 }
148
149 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
150 params>] */
151 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
152 {
153 char buf[256];
154 int i;
155 AVCodec *c;
156 const char *c_name;
157
158 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
159 see if we can handle this kind of payload */
160 get_word_sep(buf, sizeof(buf), "/", &p);
161 if (payload_type >= RTP_PT_PRIVATE) {
162 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
163 while(handler) {
164 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
165 codec->codec_id = handler->codec_id;
166 rtsp_st->dynamic_handler= handler;
167 if(handler->open) {
168 rtsp_st->dynamic_protocol_context= handler->open();
169 }
170 break;
171 }
172 handler= handler->next;
173 }
174 } else {
175 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
176 /* search into AVRtpPayloadTypes[] */
177 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
178 }
179
180 c = avcodec_find_decoder(codec->codec_id);
181 if (c && c->name)
182 c_name = c->name;
183 else
184 c_name = (char *)NULL;
185
186 if (c_name) {
187 get_word_sep(buf, sizeof(buf), "/", &p);
188 i = atoi(buf);
189 switch (codec->codec_type) {
190 case CODEC_TYPE_AUDIO:
191 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
192 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
193 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
194 if (i > 0) {
195 codec->sample_rate = i;
196 get_word_sep(buf, sizeof(buf), "/", &p);
197 i = atoi(buf);
198 if (i > 0)
199 codec->channels = i;
200 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
201 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
202 }
203 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
204 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
205 break;
206 case CODEC_TYPE_VIDEO:
207 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
208 break;
209 default:
210 break;
211 }
212 return 0;
213 }
214
215 return -1;
216 }
217
218 /* return the length and optionnaly the data */
219 static int hex_to_data(uint8_t *data, const char *p)
220 {
221 int c, len, v;
222
223 len = 0;
224 v = 1;
225 for(;;) {
226 skip_spaces(&p);
227 if (p == '\0')
228 break;
229 c = toupper((unsigned char)*p++);
230 if (c >= '0' && c <= '9')
231 c = c - '0';
232 else if (c >= 'A' && c <= 'F')
233 c = c - 'A' + 10;
234 else
235 break;
236 v = (v << 4) | c;
237 if (v & 0x100) {
238 if (data)
239 data[len] = v;
240 len++;
241 v = 1;
242 }
243 }
244 return len;
245 }
246
247 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
248 {
249 switch (codec->codec_id) {
250 case CODEC_ID_MPEG4:
251 case CODEC_ID_AAC:
252 if (!strcmp(attr, "config")) {
253 /* decode the hexa encoded parameter */
254 int len = hex_to_data(NULL, value);
255 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
256 if (!codec->extradata)
257 return;
258 codec->extradata_size = len;
259 hex_to_data(codec->extradata, value);
260 }
261 break;
262 default:
263 break;
264 }
265 return;
266 }
267
268 typedef struct attrname_map
269 {
270 const char *str;
271 uint16_t type;
272 uint32_t offset;
273 } attrname_map_t;
274
275 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
276 #define ATTR_NAME_TYPE_INT 0
277 #define ATTR_NAME_TYPE_STR 1
278 static attrname_map_t attr_names[]=
279 {
280 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
281 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
282 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
283 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
284 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
285 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
286 {NULL, -1, -1},
287 };
288
289 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
290 * because it is used in rtp_h264.c, which is forthcoming.
291 */
292 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
293 {
294 skip_spaces(p);
295 if(**p)
296 {
297 get_word_sep(attr, attr_size, "=", p);
298 if (**p == '=')
299 (*p)++;
300 get_word_sep(value, value_size, ";", p);
301 if (**p == ';')
302 (*p)++;
303 return 1;
304 }
305 return 0;
306 }
307
308 /* parse a SDP line and save stream attributes */
309 static void sdp_parse_fmtp(AVStream *st, const char *p)
310 {
311 char attr[256];
312 char value[4096];
313 int i;
314
315 RTSPStream *rtsp_st = st->priv_data;
316 AVCodecContext *codec = st->codec;
317 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
318
319 /* loop on each attribute */
320 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
321 {
322 /* grab the codec extra_data from the config parameter of the fmtp line */
323 sdp_parse_fmtp_config(codec, attr, value);
324 /* Looking for a known attribute */
325 for (i = 0; attr_names[i].str; ++i) {
326 if (!strcasecmp(attr, attr_names[i].str)) {
327 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
328 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
329 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
330 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
331 }
332 }
333 }
334 }
335
336 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
337 * and end time.
338 * Used for seeking in the rtp stream.
339 */
340 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
341 {
342 char buf[256];
343
344 skip_spaces(&p);
345 if (!av_stristart(p, "npt=", &p))
346 return;
347
348 *start = AV_NOPTS_VALUE;
349 *end = AV_NOPTS_VALUE;
350
351 get_word_sep(buf, sizeof(buf), "-", &p);
352 *start = parse_date(buf, 1);
353 if (*p == '-') {
354 p++;
355 get_word_sep(buf, sizeof(buf), "-", &p);
356 *end = parse_date(buf, 1);
357 }
358 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
359 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
360 }
361
362 typedef struct SDPParseState {
363 /* SDP only */
364 struct in_addr default_ip;
365 int default_ttl;
366 } SDPParseState;
367
368 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
369 int letter, const char *buf)
370 {
371 RTSPState *rt = s->priv_data;
372 char buf1[64], st_type[64];
373 const char *p;
374 int codec_type, payload_type, i;
375 AVStream *st;
376 RTSPStream *rtsp_st;
377 struct in_addr sdp_ip;
378 int ttl;
379
380 #ifdef DEBUG
381 printf("sdp: %c='%s'\n", letter, buf);
382 #endif
383
384 p = buf;
385 switch(letter) {
386 case 'c':
387 get_word(buf1, sizeof(buf1), &p);
388 if (strcmp(buf1, "IN") != 0)
389 return;
390 get_word(buf1, sizeof(buf1), &p);
391 if (strcmp(buf1, "IP4") != 0)
392 return;
393 get_word_sep(buf1, sizeof(buf1), "/", &p);
394 if (inet_aton(buf1, &sdp_ip) == 0)
395 return;
396 ttl = 16;
397 if (*p == '/') {
398 p++;
399 get_word_sep(buf1, sizeof(buf1), "/", &p);
400 ttl = atoi(buf1);
401 }
402 if (s->nb_streams == 0) {
403 s1->default_ip = sdp_ip;
404 s1->default_ttl = ttl;
405 } else {
406 st = s->streams[s->nb_streams - 1];
407 rtsp_st = st->priv_data;
408 rtsp_st->sdp_ip = sdp_ip;
409 rtsp_st->sdp_ttl = ttl;
410 }
411 break;
412 case 's':
413 av_strlcpy(s->title, p, sizeof(s->title));
414 break;
415 case 'i':
416 if (s->nb_streams == 0) {
417 av_strlcpy(s->comment, p, sizeof(s->comment));
418 break;
419 }
420 break;
421 case 'm':
422 /* new stream */
423 get_word(st_type, sizeof(st_type), &p);
424 if (!strcmp(st_type, "audio")) {
425 codec_type = CODEC_TYPE_AUDIO;
426 } else if (!strcmp(st_type, "video")) {
427 codec_type = CODEC_TYPE_VIDEO;
428 } else {
429 return;
430 }
431 rtsp_st = av_mallocz(sizeof(RTSPStream));
432 if (!rtsp_st)
433 return;
434 rtsp_st->stream_index = -1;
435 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
436
437 rtsp_st->sdp_ip = s1->default_ip;
438 rtsp_st->sdp_ttl = s1->default_ttl;
439
440 get_word(buf1, sizeof(buf1), &p); /* port */
441 rtsp_st->sdp_port = atoi(buf1);
442
443 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
444
445 /* XXX: handle list of formats */
446 get_word(buf1, sizeof(buf1), &p); /* format list */
447 rtsp_st->sdp_payload_type = atoi(buf1);
448
449 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
450 /* no corresponding stream */
451 } else {
452 st = av_new_stream(s, 0);
453 if (!st)
454 return;
455 st->priv_data = rtsp_st;
456 rtsp_st->stream_index = st->index;
457 st->codec->codec_type = codec_type;
458 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
459 /* if standard payload type, we can find the codec right now */
460 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
461 }
462 }
463 /* put a default control url */
464 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
465 break;
466 case 'a':
467 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
468 char proto[32];
469 /* get the control url */
470 st = s->streams[s->nb_streams - 1];
471 rtsp_st = st->priv_data;
472
473 /* XXX: may need to add full url resolution */
474 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
475 if (proto[0] == '\0') {
476 /* relative control URL */
477 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
478 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
479 } else {
480 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
481 }
482 } else if (av_strstart(p, "rtpmap:", &p)) {
483 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
484 get_word(buf1, sizeof(buf1), &p);
485 payload_type = atoi(buf1);
486 for(i = 0; i < s->nb_streams;i++) {
487 st = s->streams[i];
488 rtsp_st = st->priv_data;
489 if (rtsp_st->sdp_payload_type == payload_type) {
490 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
491 }
492 }
493 } else if (av_strstart(p, "fmtp:", &p)) {
494 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
495 get_word(buf1, sizeof(buf1), &p);
496 payload_type = atoi(buf1);
497 for(i = 0; i < s->nb_streams;i++) {
498 st = s->streams[i];
499 rtsp_st = st->priv_data;
500 if (rtsp_st->sdp_payload_type == payload_type) {
501 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
502 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
503 sdp_parse_fmtp(st, p);
504 }
505 } else {
506 sdp_parse_fmtp(st, p);
507 }
508 }
509 }
510 } else if(av_strstart(p, "framesize:", &p)) {
511 // let dynamic protocol handlers have a stab at the line.
512 get_word(buf1, sizeof(buf1), &p);
513 payload_type = atoi(buf1);
514 for(i = 0; i < s->nb_streams;i++) {
515 st = s->streams[i];
516 rtsp_st = st->priv_data;
517 if (rtsp_st->sdp_payload_type == payload_type) {
518 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
519 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
520 }
521 }
522 }
523 } else if(av_strstart(p, "range:", &p)) {
524 int64_t start, end;
525
526 // this is so that seeking on a streamed file can work.
527 rtsp_parse_range_npt(p, &start, &end);
528 s->start_time= start;
529 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
530 } else if (s->nb_streams > 0) {
531 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
532 if (rtsp_st->dynamic_handler &&
533 rtsp_st->dynamic_handler->parse_sdp_a_line)
534 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
535 rtsp_st->dynamic_protocol_context, buf);
536 }
537 break;
538 }
539 }
540
541 static int sdp_parse(AVFormatContext *s, const char *content)
542 {
543 const char *p;
544 int letter;
545 char buf[1024], *q;
546 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
547
548 memset(s1, 0, sizeof(SDPParseState));
549 p = content;
550 for(;;) {
551 skip_spaces(&p);
552 letter = *p;
553 if (letter == '\0')
554 break;
555 p++;
556 if (*p != '=')
557 goto next_line;
558 p++;
559 /* get the content */
560 q = buf;
561 while (*p != '\n' && *p != '\r' && *p != '\0') {
562 if ((q - buf) < sizeof(buf) - 1)
563 *q++ = *p;
564 p++;
565 }
566 *q = '\0';
567 sdp_parse_line(s, s1, letter, buf);
568 next_line:
569 while (*p != '\n' && *p != '\0')
570 p++;
571 if (*p == '\n')
572 p++;
573 }
574 return 0;
575 }
576
577 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
578 {
579 const char *p;
580 int v;
581
582 p = *pp;
583 skip_spaces(&p);
584 v = strtol(p, (char **)&p, 10);
585 if (*p == '-') {
586 p++;
587 *min_ptr = v;
588 v = strtol(p, (char **)&p, 10);
589 *max_ptr = v;
590 } else {
591 *min_ptr = v;
592 *max_ptr = v;
593 }
594 *pp = p;
595 }
596
597 /* XXX: only one transport specification is parsed */
598 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
599 {
600 char transport_protocol[16];
601 char profile[16];
602 char lower_transport[16];
603 char parameter[16];
604 RTSPTransportField *th;
605 char buf[256];
606
607 reply->nb_transports = 0;
608
609 for(;;) {
610 skip_spaces(&p);
611 if (*p == '\0')
612 break;
613
614 th = &reply->transports[reply->nb_transports];
615
616 get_word_sep(transport_protocol, sizeof(transport_protocol),
617 "/", &p);
618 if (*p == '/')
619 p++;
620 if (!strcasecmp (transport_protocol, "rtp")) {
621 get_word_sep(profile, sizeof(profile), "/;,", &p);
622 lower_transport[0] = '\0';
623 /* rtp/avp/<protocol> */
624 if (*p == '/') {
625 p++;
626 get_word_sep(lower_transport, sizeof(lower_transport),
627 ";,", &p);
628 }
629 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
630 /* x-pn-tng/<protocol> */
631 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
632 profile[0] = '\0';
633 }
634 if (!strcasecmp(lower_transport, "TCP"))
635 th->protocol = RTSP_PROTOCOL_RTP_TCP;
636 else
637 th->protocol = RTSP_PROTOCOL_RTP_UDP;
638
639 if (*p == ';')
640 p++;
641 /* get each parameter */
642 while (*p != '\0' && *p != ',') {
643 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
644 if (!strcmp(parameter, "port")) {
645 if (*p == '=') {
646 p++;
647 rtsp_parse_range(&th->port_min, &th->port_max, &p);
648 }
649 } else if (!strcmp(parameter, "client_port")) {
650 if (*p == '=') {
651 p++;
652 rtsp_parse_range(&th->client_port_min,
653 &th->client_port_max, &p);
654 }
655 } else if (!strcmp(parameter, "server_port")) {
656 if (*p == '=') {
657 p++;
658 rtsp_parse_range(&th->server_port_min,
659 &th->server_port_max, &p);
660 }
661 } else if (!strcmp(parameter, "interleaved")) {
662 if (*p == '=') {
663 p++;
664 rtsp_parse_range(&th->interleaved_min,
665 &th->interleaved_max, &p);
666 }
667 } else if (!strcmp(parameter, "multicast")) {
668 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
669 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
670 } else if (!strcmp(parameter, "ttl")) {
671 if (*p == '=') {
672 p++;
673 th->ttl = strtol(p, (char **)&p, 10);
674 }
675 } else if (!strcmp(parameter, "destination")) {
676 struct in_addr ipaddr;
677
678 if (*p == '=') {
679 p++;
680 get_word_sep(buf, sizeof(buf), ";,", &p);
681 if (inet_aton(buf, &ipaddr))
682 th->destination = ntohl(ipaddr.s_addr);
683 }
684 }
685 while (*p != ';' && *p != '\0' && *p != ',')
686 p++;
687 if (*p == ';')
688 p++;
689 }
690 if (*p == ',')
691 p++;
692
693 reply->nb_transports++;
694 }
695 }
696
697 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
698 {
699 const char *p;
700
701 /* NOTE: we do case independent match for broken servers */
702 p = buf;
703 if (av_stristart(p, "Session:", &p)) {
704 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
705 } else if (av_stristart(p, "Content-Length:", &p)) {
706 reply->content_length = strtol(p, NULL, 10);
707 } else if (av_stristart(p, "Transport:", &p)) {
708 rtsp_parse_transport(reply, p);
709 } else if (av_stristart(p, "CSeq:", &p)) {
710 reply->seq = strtol(p, NULL, 10);
711 } else if (av_stristart(p, "Range:", &p)) {
712 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
713 }
714 }
715
716 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
717 {
718 int ret, len;
719
720 len = 0;
721 while (len < size) {
722 ret = url_read(h, buf+len, size-len);
723 if (ret < 1)
724 return ret;
725 len += ret;
726 }
727 return len;
728 }
729
730 /* skip a RTP/TCP interleaved packet */
731 static void rtsp_skip_packet(AVFormatContext *s)
732 {
733 RTSPState *rt = s->priv_data;
734 int ret, len, len1;
735 uint8_t buf[1024];
736
737 ret = url_readbuf(rt->rtsp_hd, buf, 3);
738 if (ret != 3)
739 return;
740 len = AV_RB16(buf + 1);
741 #ifdef DEBUG
742 printf("skipping RTP packet len=%d\n", len);
743 #endif
744 /* skip payload */
745 while (len > 0) {
746 len1 = len;
747 if (len1 > sizeof(buf))
748 len1 = sizeof(buf);
749 ret = url_readbuf(rt->rtsp_hd, buf, len1);
750 if (ret != len1)
751 return;
752 len -= len1;
753 }
754 }
755
756 static void rtsp_send_cmd(AVFormatContext *s,
757 const char *cmd, RTSPHeader *reply,
758 unsigned char **content_ptr)
759 {
760 RTSPState *rt = s->priv_data;
761 char buf[4096], buf1[1024], *q;
762 unsigned char ch;
763 const char *p;
764 int content_length, line_count;
765 unsigned char *content = NULL;
766
767 memset(reply, 0, sizeof(RTSPHeader));
768
769 rt->seq++;
770 av_strlcpy(buf, cmd, sizeof(buf));
771 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
772 av_strlcat(buf, buf1, sizeof(buf));
773 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
774 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
775 av_strlcat(buf, buf1, sizeof(buf));
776 }
777 av_strlcat(buf, "\r\n", sizeof(buf));
778 #ifdef DEBUG
779 printf("Sending:\n%s--\n", buf);
780 #endif
781 url_write(rt->rtsp_hd, buf, strlen(buf));
782
783 /* parse reply (XXX: use buffers) */
784 line_count = 0;
785 rt->last_reply[0] = '\0';
786 for(;;) {
787 q = buf;
788 for(;;) {
789 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
790 break;
791 if (ch == '\n')
792 break;
793 if (ch == '$') {
794 /* XXX: only parse it if first char on line ? */
795 rtsp_skip_packet(s);
796 } else if (ch != '\r') {
797 if ((q - buf) < sizeof(buf) - 1)
798 *q++ = ch;
799 }
800 }
801 *q = '\0';
802 #ifdef DEBUG
803 printf("line='%s'\n", buf);
804 #endif
805 /* test if last line */
806 if (buf[0] == '\0')
807 break;
808 p = buf;
809 if (line_count == 0) {
810 /* get reply code */
811 get_word(buf1, sizeof(buf1), &p);
812 get_word(buf1, sizeof(buf1), &p);
813 reply->status_code = atoi(buf1);
814 } else {
815 rtsp_parse_line(reply, p);
816 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
817 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
818 }
819 line_count++;
820 }
821
822 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
823 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
824
825 content_length = reply->content_length;
826 if (content_length > 0) {
827 /* leave some room for a trailing '\0' (useful for simple parsing) */
828 content = av_malloc(content_length + 1);
829 (void)url_readbuf(rt->rtsp_hd, content, content_length);
830 content[content_length] = '\0';
831 }
832 if (content_ptr)
833 *content_ptr = content;
834 else
835 av_free(content);
836 }
837
838
839 /* close and free RTSP streams */
840 static void rtsp_close_streams(RTSPState *rt)
841 {
842 int i;
843 RTSPStream *rtsp_st;
844
845 for(i=0;i<rt->nb_rtsp_streams;i++) {
846 rtsp_st = rt->rtsp_streams[i];
847 if (rtsp_st) {
848 if (rtsp_st->rtp_ctx)
849 rtp_parse_close(rtsp_st->rtp_ctx);
850 if (rtsp_st->rtp_handle)
851 url_close(rtsp_st->rtp_handle);
852 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
853 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
854 }
855 }
856 av_free(rt->rtsp_streams);
857 }
858
859 /**
860 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
861 */
862 static int
863 make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
864 {
865 RTSPState *rt = s->priv_data;
866 int j, i, err;
867 RTSPStream *rtsp_st;
868 AVStream *st;
869 RTSPHeader reply1, *reply = &reply1;
870 char cmd[2048];
871
872 /* for each stream, make the setup request */
873 /* XXX: we assume the same server is used for the control of each
874 RTSP stream */
875
876 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
877 char transport[2048];
878
879 rtsp_st = rt->rtsp_streams[i];
880
881 /* compute available transports */
882 transport[0] = '\0';
883
884 /* RTP/UDP */
885 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
886 char buf[256];
887
888 /* first try in specified port range */
889 if (RTSP_RTP_PORT_MIN != 0) {
890 while(j <= RTSP_RTP_PORT_MAX) {
891 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
892 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
893 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
894 goto rtp_opened;
895 }
896 }
897 }
898
899 /* then try on any port
900 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
901 ** err = AVERROR_INVALIDDATA;
902 ** goto fail;
903 ** }
904 */
905
906 rtp_opened:
907 port = rtp_get_local_port(rtsp_st->rtp_handle);
908 if (transport[0] != '\0')
909 av_strlcat(transport, ",", sizeof(transport));
910 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
911 "RTP/AVP/UDP;unicast;client_port=%d-%d",
912 port, port + 1);
913 }
914
915 /* RTP/TCP */
916 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
917 if (transport[0] != '\0')
918 av_strlcat(transport, ",", sizeof(transport));
919 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
920 "RTP/AVP/TCP");
921 }
922
923 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
924 if (transport[0] != '\0')
925 av_strlcat(transport, ",", sizeof(transport));
926 snprintf(transport + strlen(transport),
927 sizeof(transport) - strlen(transport) - 1,
928 "RTP/AVP/UDP;multicast");
929 }
930 snprintf(cmd, sizeof(cmd),
931 "SETUP %s RTSP/1.0\r\n"
932 "Transport: %s\r\n",
933 rtsp_st->control_url, transport);
934 rtsp_send_cmd(s, cmd, reply, NULL);
935 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
936 err = 1;
937 goto fail;
938 } else if (reply->status_code != RTSP_STATUS_OK ||
939 reply->nb_transports != 1) {
940 err = AVERROR_INVALIDDATA;
941 goto fail;
942 }
943
944 /* XXX: same protocol for all streams is required */
945 if (i > 0) {
946 if (reply->transports[0].protocol != rt->protocol) {
947 err = AVERROR_INVALIDDATA;
948 goto fail;
949 }
950 } else {
951 rt->protocol = reply->transports[0].protocol;
952 }
953
954 /* close RTP connection if not choosen */
955 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
956 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
957 url_close(rtsp_st->rtp_handle);
958 rtsp_st->rtp_handle = NULL;
959 }
960
961 switch(reply->transports[0].protocol) {
962 case RTSP_PROTOCOL_RTP_TCP:
963 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
964 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
965 break;
966
967 case RTSP_PROTOCOL_RTP_UDP:
968 {
969 char url[1024];
970
971 /* XXX: also use address if specified */
972 snprintf(url, sizeof(url), "rtp://%s:%d",
973 host, reply->transports[0].server_port_min);
974 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
975 err = AVERROR_INVALIDDATA;
976 goto fail;
977 }
978 }
979 break;
980 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
981 {
982 char url[1024];
983 struct in_addr in;
984
985 in.s_addr = htonl(reply->transports[0].destination);
986 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
987 inet_ntoa(in),
988 reply->transports[0].port_min,
989 reply->transports[0].ttl);
990 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
991 err = AVERROR_INVALIDDATA;
992 goto fail;
993 }
994 }
995 break;
996 }
997 /* open the RTP context */
998 st = NULL;
999 if (rtsp_st->stream_index >= 0)
1000 st = s->streams[rtsp_st->stream_index];
1001 if (!st)
1002 s->ctx_flags |= AVFMTCTX_NOHEADER;
1003 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1004
1005 if (!rtsp_st->rtp_ctx) {
1006 err = AVERROR(ENOMEM);
1007 goto fail;
1008 } else {
1009 if(rtsp_st->dynamic_handler) {
1010 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1011 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1012 }
1013 }
1014 }
1015
1016 return 0;
1017
1018 fail:
1019 for (i=0; i<rt->nb_rtsp_streams; i++) {
1020 if (rt->rtsp_streams[i]->rtp_handle) {
1021 url_close(rt->rtsp_streams[i]->rtp_handle);
1022 rt->rtsp_streams[i]->rtp_handle = NULL;
1023 }
1024 }
1025 return err;
1026 }
1027
1028 static int rtsp_read_header(AVFormatContext *s,
1029 AVFormatParameters *ap)
1030 {
1031 RTSPState *rt = s->priv_data;
1032 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1033 URLContext *rtsp_hd;
1034 int port, ret, err;
1035 RTSPHeader reply1, *reply = &reply1;
1036 unsigned char *content = NULL;
1037 int protocol_mask = 0;
1038
1039 /* extract hostname and port */
1040 url_split(NULL, 0, NULL, 0,
1041 host, sizeof(host), &port, path, sizeof(path), s->filename);
1042 if (port < 0)
1043 port = RTSP_DEFAULT_PORT;
1044
1045 /* search for options */
1046 option_list = strchr(path, '?');
1047 if (option_list) {
1048 /* remove the options from the path */
1049 *option_list++ = 0;
1050 while(option_list) {
1051 /* move the option pointer */
1052 option = option_list;
1053 option_list = strchr(option_list, '&');
1054 if (option_list)
1055 *(option_list++) = 0;
1056 /* handle the options */
1057 if (strcmp(option, "udp") == 0)
1058 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1059 else if (strcmp(option, "multicast") == 0)
1060 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1061 else if (strcmp(option, "tcp") == 0)
1062 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1063 }
1064 }
1065
1066 if (!protocol_mask)
1067 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
1068
1069 /* open the tcp connexion */
1070 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1071 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1072 return AVERROR(EIO);
1073 rt->rtsp_hd = rtsp_hd;
1074 rt->seq = 0;
1075
1076 /* describe the stream */
1077 snprintf(cmd, sizeof(cmd),
1078 "DESCRIBE %s RTSP/1.0\r\n"
1079 "Accept: application/sdp\r\n",
1080 s->filename);
1081 rtsp_send_cmd(s, cmd, reply, &content);
1082 if (!content) {
1083 err = AVERROR_INVALIDDATA;
1084 goto fail;
1085 }
1086 if (reply->status_code != RTSP_STATUS_OK) {
1087 err = AVERROR_INVALIDDATA;
1088 goto fail;
1089 }
1090
1091 /* now we got the SDP description, we parse it */
1092 ret = sdp_parse(s, (const char *)content);
1093 av_freep(&content);
1094 if (ret < 0) {
1095 err = AVERROR_INVALIDDATA;
1096 goto fail;
1097 }
1098
1099 do {
1100 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
1101
1102 err = make_setup_request(s, host, port, protocol);
1103 if (err < 0)
1104 goto fail;
1105 protocol_mask &= ~(1 << protocol);
1106 if (protocol_mask == 0 && err == 1) {
1107 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1108 goto fail;
1109 }
1110 } while (err);
1111
1112 rt->state = RTSP_STATE_IDLE;
1113 rt->seek_timestamp = 0; /* default is to start stream at position
1114 zero */
1115 if (ap->initial_pause) {
1116 /* do not start immediately */
1117 } else {
1118 if (rtsp_read_play(s) < 0) {
1119 err = AVERROR_INVALIDDATA;
1120 goto fail;
1121 }
1122 }
1123 return 0;
1124 fail:
1125 rtsp_close_streams(rt);
1126 av_freep(&content);
1127 url_close(rt->rtsp_hd);
1128 return err;
1129 }
1130
1131 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1132 uint8_t *buf, int buf_size)
1133 {
1134 RTSPState *rt = s->priv_data;
1135 int id, len, i, ret;
1136 RTSPStream *rtsp_st;
1137
1138 #ifdef DEBUG_RTP_TCP
1139 printf("tcp_read_packet:\n");
1140 #endif
1141 redo:
1142 for(;;) {
1143 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1144 #ifdef DEBUG_RTP_TCP
1145 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1146 #endif
1147 if (ret != 1)
1148 return -1;
1149 if (buf[0] == '$')
1150 break;
1151 }
1152 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1153 if (ret != 3)
1154 return -1;
1155 id = buf[0];
1156 len = AV_RB16(buf + 1);
1157 #ifdef DEBUG_RTP_TCP
1158 printf("id=%d len=%d\n", id, len);
1159 #endif
1160 if (len > buf_size || len < 12)
1161 goto redo;
1162 /* get the data */
1163 ret = url_readbuf(rt->rtsp_hd, buf, len);
1164 if (ret != len)
1165 return -1;
1166
1167 /* find the matching stream */
1168 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1169 rtsp_st = rt->rtsp_streams[i];
1170 if (id >= rtsp_st->interleaved_min &&
1171 id <= rtsp_st->interleaved_max)
1172 goto found;
1173 }
1174 goto redo;
1175 found:
1176 *prtsp_st = rtsp_st;
1177 return len;
1178 }
1179
1180 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1181 uint8_t *buf, int buf_size)
1182 {
1183 RTSPState *rt = s->priv_data;
1184 RTSPStream *rtsp_st;
1185 fd_set rfds;
1186 int fd1, fd2, fd_max, n, i, ret;
1187 struct timeval tv;
1188
1189 for(;;) {
1190 if (url_interrupt_cb())
1191 return AVERROR(EINTR);
1192 FD_ZERO(&rfds);
1193 fd_max = -1;
1194 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1195 rtsp_st = rt->rtsp_streams[i];
1196 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1197 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1198 if (fd1 > fd_max)
1199 fd_max = fd1;
1200 FD_SET(fd1, &rfds);
1201 }
1202 tv.tv_sec = 0;
1203 tv.tv_usec = 100 * 1000;
1204 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1205 if (n > 0) {
1206 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1207 rtsp_st = rt->rtsp_streams[i];
1208 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1209 if (FD_ISSET(fd1, &rfds)) {
1210 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1211 if (ret > 0) {
1212 *prtsp_st = rtsp_st;
1213 return ret;
1214 }
1215 }
1216 }
1217 }
1218 }
1219 }
1220
1221 static int rtsp_read_packet(AVFormatContext *s,
1222 AVPacket *pkt)
1223 {
1224 RTSPState *rt = s->priv_data;
1225 RTSPStream *rtsp_st;
1226 int ret, len;
1227 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1228
1229 /* get next frames from the same RTP packet */
1230 if (rt->cur_rtp) {
1231 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1232 if (ret == 0) {
1233 rt->cur_rtp = NULL;
1234 return 0;
1235 } else if (ret == 1) {
1236 return 0;
1237 } else {
1238 rt->cur_rtp = NULL;
1239 }
1240 }
1241
1242 /* read next RTP packet */
1243 redo:
1244 switch(rt->protocol) {
1245 default:
1246 case RTSP_PROTOCOL_RTP_TCP:
1247 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1248 break;
1249 case RTSP_PROTOCOL_RTP_UDP:
1250 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1251 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1252 if (len >=0 && rtsp_st->rtp_ctx)
1253 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1254 break;
1255 }
1256 if (len < 0)
1257 return len;
1258 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1259 if (ret < 0)
1260 goto redo;
1261 if (ret == 1) {
1262 /* more packets may follow, so we save the RTP context */
1263 rt->cur_rtp = rtsp_st->rtp_ctx;
1264 }
1265 return 0;
1266 }
1267
1268 static int rtsp_read_play(AVFormatContext *s)
1269 {
1270 RTSPState *rt = s->priv_data;
1271 RTSPHeader reply1, *reply = &reply1;
1272 char cmd[1024];
1273
1274 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1275
1276 if (rt->state == RTSP_STATE_PAUSED) {
1277 snprintf(cmd, sizeof(cmd),
1278 "PLAY %s RTSP/1.0\r\n",
1279 s->filename);
1280 } else {
1281 snprintf(cmd, sizeof(cmd),
1282 "PLAY %s RTSP/1.0\r\n"
1283 "Range: npt=%0.3f-\r\n",
1284 s->filename,
1285 (double)rt->seek_timestamp / AV_TIME_BASE);
1286 }
1287 rtsp_send_cmd(s, cmd, reply, NULL);
1288 if (reply->status_code != RTSP_STATUS_OK) {
1289 return -1;
1290 } else {
1291 rt->state = RTSP_STATE_PLAYING;
1292 return 0;
1293 }
1294 }
1295
1296 /* pause the stream */
1297 static int rtsp_read_pause(AVFormatContext *s)
1298 {
1299 RTSPState *rt = s->priv_data;
1300 RTSPHeader reply1, *reply = &reply1;
1301 char cmd[1024];
1302
1303 rt = s->priv_data;
1304
1305 if (rt->state != RTSP_STATE_PLAYING)
1306 return 0;
1307
1308 snprintf(cmd, sizeof(cmd),
1309 "PAUSE %s RTSP/1.0\r\n",
1310 s->filename);
1311 rtsp_send_cmd(s, cmd, reply, NULL);
1312 if (reply->status_code != RTSP_STATUS_OK) {
1313 return -1;
1314 } else {
1315 rt->state = RTSP_STATE_PAUSED;
1316 return 0;
1317 }
1318 }
1319
1320 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1321 int64_t timestamp, int flags)
1322 {
1323 RTSPState *rt = s->priv_data;
1324
1325 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1326 switch(rt->state) {
1327 default:
1328 case RTSP_STATE_IDLE:
1329 break;
1330 case RTSP_STATE_PLAYING:
1331 if (rtsp_read_play(s) != 0)
1332 return -1;
1333 break;
1334 case RTSP_STATE_PAUSED:
1335 rt->state = RTSP_STATE_IDLE;
1336 break;
1337 }
1338 return 0;
1339 }
1340
1341 static int rtsp_read_close(AVFormatContext *s)
1342 {
1343 RTSPState *rt = s->priv_data;
1344 RTSPHeader reply1, *reply = &reply1;
1345 char cmd[1024];
1346
1347 #if 0
1348 /* NOTE: it is valid to flush the buffer here */
1349 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1350 url_fclose(&rt->rtsp_gb);
1351 }
1352 #endif
1353 snprintf(cmd, sizeof(cmd),
1354 "TEARDOWN %s RTSP/1.0\r\n",
1355 s->filename);
1356 rtsp_send_cmd(s, cmd, reply, NULL);
1357
1358 rtsp_close_streams(rt);
1359 url_close(rt->rtsp_hd);
1360 return 0;
1361 }
1362
1363 #ifdef CONFIG_RTSP_DEMUXER
1364 AVInputFormat rtsp_demuxer = {
1365 "rtsp",
1366 NULL_IF_CONFIG_SMALL("RTSP input format"),
1367 sizeof(RTSPState),
1368 rtsp_probe,
1369 rtsp_read_header,
1370 rtsp_read_packet,
1371 rtsp_read_close,
1372 rtsp_read_seek,
1373 .flags = AVFMT_NOFILE,
1374 .read_play = rtsp_read_play,
1375 .read_pause = rtsp_read_pause,
1376 };
1377 #endif
1378
1379 static int sdp_probe(AVProbeData *p1)
1380 {
1381 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1382
1383 /* we look for a line beginning "c=IN IP4" */
1384 while (p < p_end && *p != '\0') {
1385 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1386 return AVPROBE_SCORE_MAX / 2;
1387
1388 while(p < p_end - 1 && *p != '\n') p++;
1389 if (++p >= p_end)
1390 break;
1391 if (*p == '\r')
1392 p++;
1393 }
1394 return 0;
1395 }
1396
1397 #define SDP_MAX_SIZE 8192
1398
1399 static int sdp_read_header(AVFormatContext *s,
1400 AVFormatParameters *ap)
1401 {
1402 RTSPState *rt = s->priv_data;
1403 RTSPStream *rtsp_st;
1404 int size, i, err;
1405 char *content;
1406 char url[1024];
1407 AVStream *st;
1408
1409 /* read the whole sdp file */
1410 /* XXX: better loading */
1411 content = av_malloc(SDP_MAX_SIZE);
1412 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1413 if (size <= 0) {
1414 av_free(content);
1415 return AVERROR_INVALIDDATA;
1416 }
1417 content[size] ='\0';
1418
1419 sdp_parse(s, content);
1420 av_free(content);
1421
1422 /* open each RTP stream */
1423 for(i=0;i<rt->nb_rtsp_streams;i++) {
1424 rtsp_st = rt->rtsp_streams[i];
1425
1426 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1427 inet_ntoa(rtsp_st->sdp_ip),
1428 rtsp_st->sdp_port,
1429 rtsp_st->sdp_port,
1430 rtsp_st->sdp_ttl);
1431 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1432 err = AVERROR_INVALIDDATA;
1433 goto fail;
1434 }
1435 /* open the RTP context */
1436 st = NULL;
1437 if (rtsp_st->stream_index >= 0)
1438 st = s->streams[rtsp_st->stream_index];
1439 if (!st)
1440 s->ctx_flags |= AVFMTCTX_NOHEADER;
1441 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1442 if (!rtsp_st->rtp_ctx) {
1443 err = AVERROR(ENOMEM);
1444 goto fail;
1445 } else {
1446 if(rtsp_st->dynamic_handler) {
1447 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1448 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1449 }
1450 }
1451 }
1452 return 0;
1453 fail:
1454 rtsp_close_streams(rt);
1455 return err;
1456 }
1457
1458 static int sdp_read_packet(AVFormatContext *s,
1459 AVPacket *pkt)
1460 {
1461 return rtsp_read_packet(s, pkt);
1462 }
1463
1464 static int sdp_read_close(AVFormatContext *s)
1465 {
1466 RTSPState *rt = s->priv_data;
1467 rtsp_close_streams(rt);
1468 return 0;
1469 }
1470
1471 #ifdef CONFIG_SDP_DEMUXER
1472 AVInputFormat sdp_demuxer = {
1473 "sdp",
1474 NULL_IF_CONFIG_SMALL("SDP"),
1475 sizeof(RTSPState),
1476 sdp_probe,
1477 sdp_read_header,
1478 sdp_read_packet,
1479 sdp_read_close,
1480 };
1481 #endif
1482
1483 #ifdef CONFIG_REDIR_DEMUXER
1484 /* dummy redirector format (used directly in av_open_input_file now) */
1485 static int redir_probe(AVProbeData *pd)
1486 {
1487 const char *p;
1488 p = pd->buf;
1489 while (redir_isspace(*p))
1490 p++;
1491 if (av_strstart(p, "http://", NULL) ||
1492 av_strstart(p, "rtsp://", NULL))
1493 return AVPROBE_SCORE_MAX;
1494 return 0;
1495 }
1496
1497 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1498 {
1499 char buf[4096], *q;
1500 int c;
1501 AVFormatContext *ic = NULL;
1502 ByteIOContext *f = s->pb;
1503
1504 /* parse each URL and try to open it */
1505 c = url_fgetc(f);
1506 while (c != URL_EOF) {
1507 /* skip spaces */
1508 for(;;) {
1509 if (!redir_isspace(c))
1510 break;
1511 c = url_fgetc(f);
1512 }
1513 if (c == URL_EOF)
1514 break;
1515 /* record url */
1516 q = buf;
1517 for(;;) {
1518 if (c == URL_EOF || redir_isspace(c))
1519 break;
1520 if ((q - buf) < sizeof(buf) - 1)
1521 *q++ = c;
1522 c = url_fgetc(f);
1523 }
1524 *q = '\0';
1525 //printf("URL='%s'\n", buf);
1526 /* try to open the media file */
1527 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1528 break;
1529 }
1530 if (!ic)
1531 return AVERROR(EIO);
1532
1533 *s = *ic;
1534 url_fclose(f);
1535
1536 return 0;
1537 }
1538
1539 AVInputFormat redir_demuxer = {
1540 "redir",
1541 NULL_IF_CONFIG_SMALL("Redirector format"),
1542 0,
1543 redir_probe,
1544 redir_read_header,
1545 NULL,
1546 NULL,
1547 };
1548 #endif