do not read probe data if format is specified - match_ext() must be exported
[libav.git] / libav / rtsp.c
CommitLineData
1617ad97
FB
1/*
2 * RTSP client
3 * Copyright (c) 2002 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19#include "avformat.h"
20
21#include <sys/time.h>
b8a78f41 22#include <netinet/in.h>
1617ad97 23#include <sys/socket.h>
9ddd71fc
FR
24#ifndef __BEOS__
25# include <arpa/inet.h>
26#else
27# include "barpainet.h"
28#endif
1617ad97
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29
30//#define DEBUG
31
32typedef struct RTSPState {
33 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
34 ByteIOContext rtsp_gb;
35 int seq; /* RTSP command sequence number */
36 char session_id[512];
37 enum RTSPProtocol protocol;
38 char last_reply[2048]; /* XXX: allocate ? */
39} RTSPState;
40
41typedef struct RTSPStream {
42 AVFormatContext *ic;
43 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
44 char control_url[1024]; /* url for this stream */
45} RTSPStream;
46
47/* suppress this hack */
48int rtsp_abort_req = 0;
49
50/* XXX: currently, the only way to change the protocols consists in
51 changing this variable */
52int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_TCP) | (1 << RTSP_PROTOCOL_RTP_UDP) | (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST);
53
85fb7b34
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54/* if non zero, then set a range for RTP ports */
55int rtsp_rtp_port_min = 0;
56int rtsp_rtp_port_max = 0;
57
1617ad97
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58FFRTSPCallback *ff_rtsp_callback = NULL;
59
60static int rtsp_probe(AVProbeData *p)
61{
62 if (strstart(p->filename, "rtsp:", NULL))
63 return AVPROBE_SCORE_MAX;
64 return 0;
65}
66
67static int redir_isspace(int c)
68{
69 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
70}
71
72static void skip_spaces(const char **pp)
73{
74 const char *p;
75 p = *pp;
76 while (redir_isspace(*p))
77 p++;
78 *pp = p;
79}
80
81static void get_word_sep(char *buf, int buf_size, const char *sep,
82 const char **pp)
83{
84 const char *p;
85 char *q;
86
87 p = *pp;
88 skip_spaces(&p);
89 q = buf;
90 while (!strchr(sep, *p) && *p != '\0') {
91 if ((q - buf) < buf_size - 1)
92 *q++ = *p;
93 p++;
94 }
95 if (buf_size > 0)
96 *q = '\0';
97 *pp = p;
98}
99
100static void get_word(char *buf, int buf_size, const char **pp)
101{
102 const char *p;
103 char *q;
104
105 p = *pp;
106 skip_spaces(&p);
107 q = buf;
108 while (!redir_isspace(*p) && *p != '\0') {
109 if ((q - buf) < buf_size - 1)
110 *q++ = *p;
111 p++;
112 }
113 if (buf_size > 0)
114 *q = '\0';
115 *pp = p;
116}
117
118static void sdp_parse_line(AVFormatContext *s,
119 int letter, const char *buf)
120{
121 char buf1[64], st_type[64];
122 const char *p;
123 int codec_type, payload_type;
124 AVStream *st;
125 RTSPStream *rtsp_st;
126
127#ifdef DEBUG
128 printf("sdp: %c='%s'\n", letter, buf);
129#endif
130
131 p = buf;
132 switch(letter) {
133 case 's':
134 pstrcpy(s->title, sizeof(s->title), p);
135 break;
136 case 'i':
137 if (s->nb_streams == 0) {
138 pstrcpy(s->comment, sizeof(s->comment), p);
139 break;
140 }
141 break;
142 case 'm':
143 /* new stream */
144 get_word(st_type, sizeof(st_type), &p);
145 if (!strcmp(st_type, "audio")) {
146 codec_type = CODEC_TYPE_AUDIO;
147 } else if (!strcmp(st_type, "video")) {
148 codec_type = CODEC_TYPE_VIDEO;
149 } else {
150 return;
151 }
152 get_word(buf1, sizeof(buf1), &p); /* port */
153 get_word(buf1, sizeof(buf1), &p); /* protocol */
154 /* XXX: handle list of formats */
155 get_word(buf1, sizeof(buf1), &p); /* format list */
156 payload_type = atoi(buf1);
157
158 rtsp_st = av_mallocz(sizeof(RTSPStream));
159 if (!rtsp_st)
160 return;
161 st = av_new_stream(s, s->nb_streams);
162 if (!st)
163 return;
164 st->priv_data = rtsp_st;
165 /* put a default control url */
166 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
167 st->codec.codec_type = codec_type;
168 rtp_get_codec_info(&st->codec, payload_type);
169 break;
170 case 'a':
171 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
172 char proto[32];
173 /* get the control url */
174 st = s->streams[s->nb_streams - 1];
175 rtsp_st = st->priv_data;
176
177 /* XXX: may need to add full url resolution */
178 url_split(proto, sizeof(proto), NULL, 0, NULL, NULL, 0, p);
179 if (proto[0] == '\0') {
180 /* relative control URL */
181 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
182 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
183 } else {
184 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
185 }
186 }
187 break;
188 }
189}
190
191int sdp_parse(AVFormatContext *s, const char *content)
192{
193 const char *p;
194 int letter;
195 char buf[1024], *q;
196
197 p = content;
198 for(;;) {
199 skip_spaces(&p);
200 letter = *p;
201 if (letter == '\0')
202 break;
203 p++;
204 if (*p != '=')
205 goto next_line;
206 p++;
207 /* get the content */
208 q = buf;
209 while (*p != '\n' && *p != '\0') {
210 if ((q - buf) < sizeof(buf) - 1)
211 *q++ = *p;
212 p++;
213 }
214 *q = '\0';
215 sdp_parse_line(s, letter, buf);
216 next_line:
217 while (*p != '\n' && *p != '\0')
218 p++;
219 if (*p == '\n')
220 p++;
221 }
222 return 0;
223}
224
225static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
226{
227 const char *p;
228 int v;
229
230 p = *pp;
231 skip_spaces(&p);
232 v = strtol(p, (char **)&p, 10);
233 if (*p == '-') {
234 p++;
235 *min_ptr = v;
236 v = strtol(p, (char **)&p, 10);
237 *max_ptr = v;
238 } else {
239 *min_ptr = v;
240 *max_ptr = v;
241 }
242 *pp = p;
243}
244
245/* XXX: only one transport specification is parsed */
246static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
247{
248 char transport_protocol[16];
249 char profile[16];
250 char lower_transport[16];
251 char parameter[16];
252 RTSPTransportField *th;
253 char buf[256];
254
255 reply->nb_transports = 0;
256
257 for(;;) {
258 skip_spaces(&p);
259 if (*p == '\0')
260 break;
261
262 th = &reply->transports[reply->nb_transports];
263
264 get_word_sep(transport_protocol, sizeof(transport_protocol),
265 "/", &p);
266 if (*p == '/')
267 p++;
268 get_word_sep(profile, sizeof(profile), "/;,", &p);
269 lower_transport[0] = '\0';
270 if (*p == '/') {
271 get_word_sep(lower_transport, sizeof(lower_transport),
272 ";,", &p);
273 }
274 if (!strcmp(lower_transport, "TCP"))
275 th->protocol = RTSP_PROTOCOL_RTP_TCP;
276 else
277 th->protocol = RTSP_PROTOCOL_RTP_UDP;
278
279 if (*p == ';')
280 p++;
281 /* get each parameter */
282 while (*p != '\0' && *p != ',') {
283 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
284 if (!strcmp(parameter, "port")) {
285 if (*p == '=') {
286 p++;
287 rtsp_parse_range(&th->port_min, &th->port_max, &p);
288 }
289 } else if (!strcmp(parameter, "client_port")) {
290 if (*p == '=') {
291 p++;
292 rtsp_parse_range(&th->client_port_min,
293 &th->client_port_max, &p);
294 }
295 } else if (!strcmp(parameter, "server_port")) {
296 if (*p == '=') {
297 p++;
298 rtsp_parse_range(&th->server_port_min,
299 &th->server_port_max, &p);
300 }
301 } else if (!strcmp(parameter, "interleaved")) {
302 if (*p == '=') {
303 p++;
304 rtsp_parse_range(&th->interleaved_min,
305 &th->interleaved_max, &p);
306 }
307 } else if (!strcmp(parameter, "multicast")) {
308 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
309 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
310 } else if (!strcmp(parameter, "ttl")) {
311 if (*p == '=') {
312 p++;
313 th->ttl = strtol(p, (char **)&p, 10);
314 }
315 } else if (!strcmp(parameter, "destination")) {
316 struct in_addr ipaddr;
317
318 if (*p == '=') {
319 p++;
320 get_word_sep(buf, sizeof(buf), ";,", &p);
321 if (inet_aton(buf, &ipaddr))
322 th->destination = ntohl(ipaddr.s_addr);
323 }
324 }
325 while (*p != ';' && *p != '\0' && *p != ',')
326 p++;
327 if (*p == ';')
328 p++;
329 }
330 if (*p == ',')
331 p++;
332
333 reply->nb_transports++;
334 }
335}
336
337void rtsp_parse_line(RTSPHeader *reply, const char *buf)
338{
339 const char *p;
340
341 /* NOTE: we do case independent match for broken servers */
342 p = buf;
343 if (stristart(p, "Session:", &p)) {
344 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
345 } else if (stristart(p, "Content-Length:", &p)) {
346 reply->content_length = strtol(p, NULL, 10);
347 } else if (stristart(p, "Transport:", &p)) {
348 rtsp_parse_transport(reply, p);
349 } else if (stristart(p, "CSeq:", &p)) {
350 reply->seq = strtol(p, NULL, 10);
351 }
352}
353
354
355static void rtsp_send_cmd(AVFormatContext *s,
356 const char *cmd, RTSPHeader *reply,
357 unsigned char **content_ptr)
358{
359 RTSPState *rt = s->priv_data;
360 char buf[4096], buf1[1024], *q;
361 unsigned char ch;
362 const char *p;
363 int content_length, line_count;
364 unsigned char *content = NULL;
365
366 memset(reply, 0, sizeof(RTSPHeader));
367
368 rt->seq++;
369 pstrcpy(buf, sizeof(buf), cmd);
370 snprintf(buf1, sizeof(buf1), "CSeq: %d\n", rt->seq);
371 pstrcat(buf, sizeof(buf), buf1);
372 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
373 snprintf(buf1, sizeof(buf1), "Session: %s\n", rt->session_id);
374 pstrcat(buf, sizeof(buf), buf1);
375 }
376 pstrcat(buf, sizeof(buf), "\n");
377#ifdef DEBUG
378 printf("Sending:\n%s--\n", buf);
379#endif
380 url_write(rt->rtsp_hd, buf, strlen(buf));
381
382 /* parse reply (XXX: use buffers) */
383 line_count = 0;
384 rt->last_reply[0] = '\0';
385 for(;;) {
386 q = buf;
387 for(;;) {
388 if (url_read(rt->rtsp_hd, &ch, 1) == 0)
389 break;
390 if (ch == '\n')
391 break;
392 if (ch != '\r') {
393 if ((q - buf) < sizeof(buf) - 1)
394 *q++ = ch;
395 }
396 }
397 *q = '\0';
398#ifdef DEBUG
399 printf("line='%s'\n", buf);
400#endif
401 /* test if last line */
402 if (buf[0] == '\0')
403 break;
404 p = buf;
405 if (line_count == 0) {
406 /* get reply code */
407 get_word(buf1, sizeof(buf1), &p);
408 get_word(buf1, sizeof(buf1), &p);
409 reply->status_code = atoi(buf1);
410 } else {
411 rtsp_parse_line(reply, p);
412 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
413 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
414 }
415 line_count++;
416 }
417
418 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
419 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
420
421 content_length = reply->content_length;
422 if (content_length > 0) {
423 /* leave some room for a trailing '\0' (useful for simple parsing) */
424 content = av_malloc(content_length + 1);
425 url_read(rt->rtsp_hd, content, content_length);
426 content[content_length] = '\0';
427 }
428 if (content_ptr)
429 *content_ptr = content;
430}
431
432/* useful for modules: set RTSP callback function */
433
434void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
435{
436 ff_rtsp_callback = rtsp_cb;
437}
438
439
440static int rtsp_read_header(AVFormatContext *s,
441 AVFormatParameters *ap)
442{
443 RTSPState *rt = s->priv_data;
444 char host[1024], path[1024], tcpname[1024], cmd[2048];
445 URLContext *rtsp_hd;
446 int port, i, ret, err;
447 RTSPHeader reply1, *reply = &reply1;
448 unsigned char *content = NULL;
449 AVStream *st;
450 RTSPStream *rtsp_st;
451 int protocol_mask;
452
453 rtsp_abort_req = 0;
454
455 /* extract hostname and port */
456 url_split(NULL, 0,
457 host, sizeof(host), &port, path, sizeof(path), s->filename);
458 if (port < 0)
459 port = RTSP_DEFAULT_PORT;
460
461 /* open the tcp connexion */
462 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
463 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
464 return AVERROR_IO;
465 rt->rtsp_hd = rtsp_hd;
466 rt->seq = 0;
467
468 /* describe the stream */
469 snprintf(cmd, sizeof(cmd),
470 "DESCRIBE %s RTSP/1.0\n"
471 "Accept: application/sdp\n",
472 s->filename);
473 rtsp_send_cmd(s, cmd, reply, &content);
474 if (!content) {
475 err = AVERROR_INVALIDDATA;
476 goto fail;
477 }
478 if (reply->status_code != RTSP_STATUS_OK) {
479 err = AVERROR_INVALIDDATA;
480 goto fail;
481 }
482
483 /* now we got the SDP description, we parse it */
484 ret = sdp_parse(s, (const char *)content);
485 av_freep(&content);
486 if (ret < 0) {
487 err = AVERROR_INVALIDDATA;
488 goto fail;
489 }
490
491 protocol_mask = rtsp_default_protocols;
492
493 /* for each stream, make the setup request */
494 /* XXX: we assume the same server is used for the control of each
495 RTSP stream */
496 for(i=0;i<s->nb_streams;i++) {
1617ad97 497 char transport[2048];
85fb7b34 498 AVInputFormat *fmt;
1617ad97
FB
499
500 st = s->streams[i];
501 rtsp_st = st->priv_data;
502
503 /* compute available transports */
504 transport[0] = '\0';
505
506 /* RTP/UDP */
507 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
85fb7b34
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508 char buf[256];
509 int j;
510
511 /* first try in specified port range */
512 if (rtsp_rtp_port_min != 0) {
513 for(j=rtsp_rtp_port_min;j<=rtsp_rtp_port_max;j++) {
514 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
515 if (!av_open_input_file(&rtsp_st->ic, buf,
516 &rtp_demux, 0, NULL))
517 goto rtp_opened;
518 }
1617ad97 519 }
85fb7b34
FB
520
521 /* then try on any port */
522 if (av_open_input_file(&rtsp_st->ic, "rtp://",
523 &rtp_demux, 0, NULL) < 0) {
524 err = AVERROR_INVALIDDATA;
525 goto fail;
526 }
527
528 rtp_opened:
1617ad97
FB
529 port = rtp_get_local_port(url_fileno(&rtsp_st->ic->pb));
530 if (transport[0] != '\0')
531 pstrcat(transport, sizeof(transport), ",");
532 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
533 "RTP/AVP/UDP;unicast;client_port=%d-%d",
534 port, port + 1);
535 }
536
537 /* RTP/TCP */
538 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
539 if (transport[0] != '\0')
540 pstrcat(transport, sizeof(transport), ",");
541 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
542 "RTP/AVP/TCP");
543 }
544
545 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
546 if (transport[0] != '\0')
547 pstrcat(transport, sizeof(transport), ",");
548 snprintf(transport + strlen(transport),
549 sizeof(transport) - strlen(transport) - 1,
550 "RTP/AVP/UDP;multicast");
551 }
552
553 snprintf(cmd, sizeof(cmd),
554 "SETUP %s RTSP/1.0\n"
555 "Transport: %s\n",
556 rtsp_st->control_url, transport);
557 rtsp_send_cmd(s, cmd, reply, NULL);
558 if (reply->status_code != RTSP_STATUS_OK ||
559 reply->nb_transports != 1) {
560 err = AVERROR_INVALIDDATA;
561 goto fail;
562 }
563
564 /* XXX: same protocol for all streams is required */
565 if (i > 0) {
566 if (reply->transports[0].protocol != rt->protocol) {
567 err = AVERROR_INVALIDDATA;
568 goto fail;
569 }
570 } else {
571 rt->protocol = reply->transports[0].protocol;
572 }
573
574 /* close RTP connection if not choosen */
575 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
576 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
577 av_close_input_file(rtsp_st->ic);
578 rtsp_st->ic = NULL;
579 }
580
581 switch(reply->transports[0].protocol) {
582 case RTSP_PROTOCOL_RTP_TCP:
583 fmt = &rtp_demux;
584 if (av_open_input_file(&rtsp_st->ic, "null", fmt, 0, NULL) < 0) {
585 err = AVERROR_INVALIDDATA;
586 goto fail;
587 }
588 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
589 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
590 break;
591
592 case RTSP_PROTOCOL_RTP_UDP:
593 {
594 char url[1024];
595
596 /* XXX: also use address if specified */
597 snprintf(url, sizeof(url), "rtp://%s:%d",
598 host, reply->transports[0].server_port_min);
599 if (rtp_set_remote_url(url_fileno(&rtsp_st->ic->pb), url) < 0) {
600 err = AVERROR_INVALIDDATA;
601 goto fail;
602 }
603 }
604 break;
605 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
606 {
607 char url[1024];
608 int ttl;
609
610 fmt = &rtp_demux;
611 ttl = reply->transports[0].ttl;
612 if (!ttl)
613 ttl = 16;
614 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
615 host,
616 reply->transports[0].server_port_min,
617 ttl);
618 if (av_open_input_file(&rtsp_st->ic, url, fmt, 0, NULL) < 0) {
619 err = AVERROR_INVALIDDATA;
620 goto fail;
621 }
622 }
623 break;
624 }
625 }
626
627 /* use callback if available to extend setup */
628 if (ff_rtsp_callback) {
629 if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
630 NULL, 0, rt->last_reply) < 0) {
631 err = AVERROR_INVALIDDATA;
632 goto fail;
633 }
634 }
635
636 /* start playing */
637 snprintf(cmd, sizeof(cmd),
638 "PLAY %s RTSP/1.0\n",
639 s->filename);
640 rtsp_send_cmd(s, cmd, reply, NULL);
641 if (reply->status_code != RTSP_STATUS_OK) {
642 err = AVERROR_INVALIDDATA;
643 goto fail;
644 }
645
646 /* open TCP with bufferized input */
647 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
648 if (url_fdopen(&rt->rtsp_gb, rt->rtsp_hd) < 0) {
649 err = AVERROR_NOMEM;
650 goto fail;
651 }
652 }
653
654 return 0;
655 fail:
656 for(i=0;i<s->nb_streams;i++) {
657 st = s->streams[i];
658 rtsp_st = st->priv_data;
659 if (rtsp_st) {
660 if (rtsp_st->ic)
661 av_close_input_file(rtsp_st->ic);
662 }
663 av_free(rtsp_st);
664 }
665 av_freep(&content);
666 url_close(rt->rtsp_hd);
667 return err;
668}
669
670static int tcp_read_packet(AVFormatContext *s,
671 AVPacket *pkt)
672{
673 RTSPState *rt = s->priv_data;
674 ByteIOContext *rtsp_gb = &rt->rtsp_gb;
675 int c, id, len, i, ret;
676 AVStream *st;
677 RTSPStream *rtsp_st;
678 char buf[RTP_MAX_PACKET_LENGTH];
679
680 redo:
681 for(;;) {
682 c = url_fgetc(rtsp_gb);
683 if (c == URL_EOF)
684 return AVERROR_IO;
685 if (c == '$')
686 break;
687 }
688 id = get_byte(rtsp_gb);
689 len = get_be16(rtsp_gb);
690 if (len > RTP_MAX_PACKET_LENGTH || len < 12)
691 goto redo;
692 /* get the data */
693 get_buffer(rtsp_gb, buf, len);
694
695 /* find the matching stream */
696 for(i = 0; i < s->nb_streams; i++) {
697 st = s->streams[i];
698 rtsp_st = st->priv_data;
699 if (i >= rtsp_st->interleaved_min &&
700 i <= rtsp_st->interleaved_max)
701 goto found;
702 }
703 goto redo;
704 found:
705 ret = rtp_parse_packet(rtsp_st->ic, pkt, buf, len);
706 if (ret < 0)
707 goto redo;
708 pkt->stream_index = i;
709 return ret;
710}
711
712/* NOTE: output one packet at a time. May need to add a small fifo */
713static int udp_read_packet(AVFormatContext *s,
714 AVPacket *pkt)
715{
716 AVFormatContext *ic;
717 AVStream *st;
718 RTSPStream *rtsp_st;
719 fd_set rfds;
720 int fd1, fd2, fd_max, n, i, ret;
721 char buf[RTP_MAX_PACKET_LENGTH];
722 struct timeval tv;
723
724 for(;;) {
725 if (rtsp_abort_req)
726 return -EIO;
727 FD_ZERO(&rfds);
728 fd_max = -1;
729 for(i = 0; i < s->nb_streams; i++) {
730 st = s->streams[i];
731 rtsp_st = st->priv_data;
732 ic = rtsp_st->ic;
733 /* currently, we cannot probe RTCP handle because of blocking restrictions */
734 rtp_get_file_handles(url_fileno(&ic->pb), &fd1, &fd2);
735 if (fd1 > fd_max)
736 fd_max = fd1;
737 FD_SET(fd1, &rfds);
738 }
739 /* XXX: also add proper API to abort */
740 tv.tv_sec = 0;
741 tv.tv_usec = 500000;
742 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
743 if (n > 0) {
744 for(i = 0; i < s->nb_streams; i++) {
745 st = s->streams[i];
746 rtsp_st = st->priv_data;
747 ic = rtsp_st->ic;
748 rtp_get_file_handles(url_fileno(&ic->pb), &fd1, &fd2);
749 if (FD_ISSET(fd1, &rfds)) {
750 ret = url_read(url_fileno(&ic->pb), buf, sizeof(buf));
751 if (ret >= 0 &&
752 rtp_parse_packet(ic, pkt, buf, ret) == 0) {
753 pkt->stream_index = i;
754 return ret;
755 }
756 }
757 }
758 }
759 }
760}
761
762static int rtsp_read_packet(AVFormatContext *s,
763 AVPacket *pkt)
764{
765 RTSPState *rt = s->priv_data;
766 int ret;
767
768 switch(rt->protocol) {
769 default:
770 case RTSP_PROTOCOL_RTP_TCP:
771 ret = tcp_read_packet(s, pkt);
772 break;
773 case RTSP_PROTOCOL_RTP_UDP:
774 ret = udp_read_packet(s, pkt);
775 break;
776 }
777 return ret;
778}
779
780static int rtsp_read_close(AVFormatContext *s)
781{
782 RTSPState *rt = s->priv_data;
783 AVStream *st;
784 RTSPStream *rtsp_st;
785 RTSPHeader reply1, *reply = &reply1;
786 int i;
787 char cmd[1024];
788
789 /* NOTE: it is valid to flush the buffer here */
790 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
791 url_fclose(&rt->rtsp_gb);
792 }
793
794 snprintf(cmd, sizeof(cmd),
795 "TEARDOWN %s RTSP/1.0\n",
796 s->filename);
797 rtsp_send_cmd(s, cmd, reply, NULL);
798
799 if (ff_rtsp_callback) {
800 ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
801 NULL, 0, NULL);
802 }
803
804 for(i=0;i<s->nb_streams;i++) {
805 st = s->streams[i];
806 rtsp_st = st->priv_data;
807 if (rtsp_st) {
808 if (rtsp_st->ic)
809 av_close_input_file(rtsp_st->ic);
810 }
811 av_free(rtsp_st);
812 }
813 url_close(rt->rtsp_hd);
814 return 0;
815}
816
817static AVInputFormat rtsp_demux = {
818 "rtsp",
819 "RTSP input format",
820 sizeof(RTSPState),
821 rtsp_probe,
822 rtsp_read_header,
823 rtsp_read_packet,
824 rtsp_read_close,
bb76a117 825 .flags = AVFMT_NOFILE,
1617ad97
FB
826};
827
828/* dummy redirector format (used directly in av_open_input_file now) */
829static int redir_probe(AVProbeData *pd)
830{
831 const char *p;
832 p = pd->buf;
833 while (redir_isspace(*p))
834 p++;
835 if (strstart(p, "http://", NULL) ||
836 strstart(p, "rtsp://", NULL))
837 return AVPROBE_SCORE_MAX;
838 return 0;
839}
840
841/* called from utils.c */
842int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
843{
844 char buf[4096], *q;
845 int c;
846 AVFormatContext *ic = NULL;
847
848 /* parse each URL and try to open it */
849 c = url_fgetc(f);
850 while (c != URL_EOF) {
851 /* skip spaces */
852 for(;;) {
853 if (!redir_isspace(c))
854 break;
855 c = url_fgetc(f);
856 }
857 if (c == URL_EOF)
858 break;
859 /* record url */
860 q = buf;
861 for(;;) {
862 if (c == URL_EOF || redir_isspace(c))
863 break;
864 if ((q - buf) < sizeof(buf) - 1)
865 *q++ = c;
866 c = url_fgetc(f);
867 }
868 *q = '\0';
869 //printf("URL='%s'\n", buf);
870 /* try to open the media file */
871 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
872 break;
873 }
874 *ic_ptr = ic;
875 if (!ic)
876 return AVERROR_IO;
877 else
878 return 0;
879}
880
881AVInputFormat redir_demux = {
882 "redir",
883 "Redirector format",
884 0,
885 redir_probe,
886 NULL,
887 NULL,
888 NULL,
889};
890
891int rtsp_init(void)
892{
893 av_register_input_format(&rtsp_demux);
894 av_register_input_format(&redir_demux);
895 return 0;
896}