10l (dont store 2 different things at the same place ...)
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
1617ad97
FB
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
438fcb75 21#include <unistd.h> /* for select() prototype */
1617ad97 22#include <sys/time.h>
b8a78f41 23#include <netinet/in.h>
1617ad97 24#include <sys/socket.h>
9ddd71fc
FR
25#ifndef __BEOS__
26# include <arpa/inet.h>
27#else
28# include "barpainet.h"
29#endif
1617ad97
FB
30
31//#define DEBUG
b6892136 32//#define DEBUG_RTP_TCP
1617ad97 33
ff762d6e
FB
34enum RTSPClientState {
35 RTSP_STATE_IDLE,
36 RTSP_STATE_PLAYING,
37 RTSP_STATE_PAUSED,
38};
39
1617ad97
FB
40typedef struct RTSPState {
41 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
8b1ab7bf
FB
42 int nb_rtsp_streams;
43 struct RTSPStream **rtsp_streams;
ff762d6e
FB
44
45 enum RTSPClientState state;
46 int64_t seek_timestamp;
47
b6892136
FB
48 /* XXX: currently we use unbuffered input */
49 // ByteIOContext rtsp_gb;
1617ad97
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50 int seq; /* RTSP command sequence number */
51 char session_id[512];
52 enum RTSPProtocol protocol;
53 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 54 RTPDemuxContext *cur_rtp;
1617ad97
FB
55} RTSPState;
56
57typedef struct RTSPStream {
8b1ab7bf
FB
58 URLContext *rtp_handle; /* RTP stream handle */
59 RTPDemuxContext *rtp_ctx; /* RTP parse context */
60
61 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 62 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
93ced3e8
FB
63 char control_url[1024]; /* url for this stream (from SDP) */
64
65 int sdp_port; /* port (from SDP content - not used in RTSP) */
66 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
67 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
68 int sdp_payload_type; /* payload type - only used in SDP */
1617ad97
FB
69} RTSPStream;
70
ff762d6e
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71static int rtsp_read_play(AVFormatContext *s);
72
1617ad97
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73/* XXX: currently, the only way to change the protocols consists in
74 changing this variable */
ff762d6e 75#if 0
1617ad97 76int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_TCP) | (1 << RTSP_PROTOCOL_RTP_UDP) | (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST);
b6892136
FB
77#else
78/* try it if a proxy is used */
79int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_TCP);
80#endif
1617ad97 81
85fb7b34
FB
82/* if non zero, then set a range for RTP ports */
83int rtsp_rtp_port_min = 0;
84int rtsp_rtp_port_max = 0;
85
1617ad97
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86FFRTSPCallback *ff_rtsp_callback = NULL;
87
88static int rtsp_probe(AVProbeData *p)
89{
90 if (strstart(p->filename, "rtsp:", NULL))
91 return AVPROBE_SCORE_MAX;
92 return 0;
93}
94
95static int redir_isspace(int c)
96{
97 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
98}
99
100static void skip_spaces(const char **pp)
101{
102 const char *p;
103 p = *pp;
104 while (redir_isspace(*p))
105 p++;
106 *pp = p;
107}
108
109static void get_word_sep(char *buf, int buf_size, const char *sep,
110 const char **pp)
111{
112 const char *p;
113 char *q;
114
115 p = *pp;
116 skip_spaces(&p);
117 q = buf;
118 while (!strchr(sep, *p) && *p != '\0') {
119 if ((q - buf) < buf_size - 1)
120 *q++ = *p;
121 p++;
122 }
123 if (buf_size > 0)
124 *q = '\0';
125 *pp = p;
126}
127
128static void get_word(char *buf, int buf_size, const char **pp)
129{
130 const char *p;
131 char *q;
132
133 p = *pp;
134 skip_spaces(&p);
135 q = buf;
136 while (!redir_isspace(*p) && *p != '\0') {
137 if ((q - buf) < buf_size - 1)
138 *q++ = *p;
139 p++;
140 }
141 if (buf_size > 0)
142 *q = '\0';
143 *pp = p;
144}
145
93ced3e8
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146/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
147 params>] */
148static int sdp_parse_rtpmap(AVCodecContext *codec, const char *p)
149{
150 char buf[256];
151
152 /* codec name */
153 get_word_sep(buf, sizeof(buf), "/", &p);
154 if (!strcmp(buf, "MP4V-ES")) {
155 codec->codec_id = CODEC_ID_MPEG4;
156 return 0;
157 } else {
158 return -1;
159 }
160}
161
162/* return the length and optionnaly the data */
163static int hex_to_data(uint8_t *data, const char *p)
164{
165 int c, len, v;
166
167 len = 0;
168 v = 1;
169 for(;;) {
170 skip_spaces(&p);
171 if (p == '\0')
172 break;
173 c = toupper((unsigned char)*p++);
174 if (c >= '0' && c <= '9')
175 c = c - '0';
176 else if (c >= 'A' && c <= 'F')
177 c = c - 'A' + 10;
178 else
179 break;
180 v = (v << 4) | c;
181 if (v & 0x100) {
182 if (data)
183 data[len] = v;
184 len++;
185 v = 1;
186 }
187 }
188 return len;
189}
190
191static void sdp_parse_fmtp(AVCodecContext *codec, const char *p)
192{
193 char attr[256];
194 char value[4096];
195 int len;
196
197 /* loop on each attribute */
198 for(;;) {
199 skip_spaces(&p);
200 if (*p == '\0')
201 break;
202 get_word_sep(attr, sizeof(attr), "=", &p);
203 if (*p == '=')
204 p++;
205 get_word_sep(value, sizeof(value), ";", &p);
206 if (*p == ';')
207 p++;
208 /* handle MPEG4 video */
209 switch(codec->codec_id) {
210 case CODEC_ID_MPEG4:
211 if (!strcmp(attr, "config")) {
212 /* decode the hexa encoded parameter */
213 len = hex_to_data(NULL, value);
214 codec->extradata = av_mallocz(len);
215 if (!codec->extradata)
216 goto fail;
217 codec->extradata_size = len;
218 hex_to_data(codec->extradata, value);
219 }
220 break;
221 default:
222 /* ignore data for other codecs */
223 break;
224 }
225 fail: ;
226 // printf("'%s' = '%s'\n", attr, value);
227 }
228}
229
230typedef struct SDPParseState {
231 /* SDP only */
232 struct in_addr default_ip;
233 int default_ttl;
234} SDPParseState;
235
236static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
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237 int letter, const char *buf)
238{
8b1ab7bf 239 RTSPState *rt = s->priv_data;
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240 char buf1[64], st_type[64];
241 const char *p;
93ced3e8 242 int codec_type, payload_type, i;
1617ad97
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243 AVStream *st;
244 RTSPStream *rtsp_st;
93ced3e8
FB
245 struct in_addr sdp_ip;
246 int ttl;
247
1617ad97
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248#ifdef DEBUG
249 printf("sdp: %c='%s'\n", letter, buf);
250#endif
251
252 p = buf;
253 switch(letter) {
93ced3e8
FB
254 case 'c':
255 get_word(buf1, sizeof(buf1), &p);
256 if (strcmp(buf1, "IN") != 0)
257 return;
258 get_word(buf1, sizeof(buf1), &p);
259 if (strcmp(buf1, "IP4") != 0)
260 return;
261 get_word_sep(buf1, sizeof(buf1), "/", &p);
262 if (inet_aton(buf1, &sdp_ip) == 0)
263 return;
264 ttl = 16;
265 if (*p == '/') {
266 p++;
267 get_word_sep(buf1, sizeof(buf1), "/", &p);
268 ttl = atoi(buf1);
269 }
270 if (s->nb_streams == 0) {
271 s1->default_ip = sdp_ip;
272 s1->default_ttl = ttl;
273 } else {
274 st = s->streams[s->nb_streams - 1];
275 rtsp_st = st->priv_data;
276 rtsp_st->sdp_ip = sdp_ip;
277 rtsp_st->sdp_ttl = ttl;
278 }
279 break;
1617ad97
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280 case 's':
281 pstrcpy(s->title, sizeof(s->title), p);
282 break;
283 case 'i':
284 if (s->nb_streams == 0) {
285 pstrcpy(s->comment, sizeof(s->comment), p);
286 break;
287 }
288 break;
289 case 'm':
290 /* new stream */
291 get_word(st_type, sizeof(st_type), &p);
292 if (!strcmp(st_type, "audio")) {
293 codec_type = CODEC_TYPE_AUDIO;
294 } else if (!strcmp(st_type, "video")) {
295 codec_type = CODEC_TYPE_VIDEO;
296 } else {
297 return;
298 }
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299 rtsp_st = av_mallocz(sizeof(RTSPStream));
300 if (!rtsp_st)
301 return;
8b1ab7bf
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302 rtsp_st->stream_index = -1;
303 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
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304
305 rtsp_st->sdp_ip = s1->default_ip;
306 rtsp_st->sdp_ttl = s1->default_ttl;
307
93ced3e8
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308 get_word(buf1, sizeof(buf1), &p); /* port */
309 rtsp_st->sdp_port = atoi(buf1);
310
311 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
312
313 /* XXX: handle list of formats */
314 get_word(buf1, sizeof(buf1), &p); /* format list */
315 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 316
8b1ab7bf
FB
317 if (rtsp_st->sdp_payload_type == RTP_PT_MPEG2TS) {
318 /* no corresponding stream */
319 } else {
320 st = av_new_stream(s, 0);
321 if (!st)
322 return;
323 st->priv_data = rtsp_st;
324 rtsp_st->stream_index = st->index;
325 st->codec.codec_type = codec_type;
326 if (rtsp_st->sdp_payload_type < 96) {
327 /* if standard payload type, we can find the codec right now */
328 rtp_get_codec_info(&st->codec, rtsp_st->sdp_payload_type);
329 }
330 }
1617ad97
FB
331 /* put a default control url */
332 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
1617ad97
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333 break;
334 case 'a':
335 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
336 char proto[32];
337 /* get the control url */
338 st = s->streams[s->nb_streams - 1];
339 rtsp_st = st->priv_data;
340
341 /* XXX: may need to add full url resolution */
342 url_split(proto, sizeof(proto), NULL, 0, NULL, NULL, 0, p);
343 if (proto[0] == '\0') {
344 /* relative control URL */
345 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
346 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
347 } else {
348 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
349 }
93ced3e8
FB
350 } else if (strstart(p, "rtpmap:", &p)) {
351 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
352 get_word(buf1, sizeof(buf1), &p);
353 payload_type = atoi(buf1);
354 for(i = 0; i < s->nb_streams;i++) {
355 st = s->streams[i];
356 rtsp_st = st->priv_data;
357 if (rtsp_st->sdp_payload_type == payload_type) {
358 sdp_parse_rtpmap(&st->codec, p);
359 }
360 }
361 } else if (strstart(p, "fmtp:", &p)) {
362 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
363 get_word(buf1, sizeof(buf1), &p);
364 payload_type = atoi(buf1);
365 for(i = 0; i < s->nb_streams;i++) {
366 st = s->streams[i];
367 rtsp_st = st->priv_data;
368 if (rtsp_st->sdp_payload_type == payload_type) {
369 sdp_parse_fmtp(&st->codec, p);
370 }
371 }
1617ad97
FB
372 }
373 break;
374 }
375}
376
5c91a675 377static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
378{
379 const char *p;
380 int letter;
381 char buf[1024], *q;
93ced3e8
FB
382 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
383
384 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
385 p = content;
386 for(;;) {
387 skip_spaces(&p);
388 letter = *p;
389 if (letter == '\0')
390 break;
391 p++;
392 if (*p != '=')
393 goto next_line;
394 p++;
395 /* get the content */
396 q = buf;
b6892136 397 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
398 if ((q - buf) < sizeof(buf) - 1)
399 *q++ = *p;
400 p++;
401 }
402 *q = '\0';
93ced3e8 403 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
404 next_line:
405 while (*p != '\n' && *p != '\0')
406 p++;
407 if (*p == '\n')
408 p++;
409 }
410 return 0;
411}
412
413static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
414{
415 const char *p;
416 int v;
417
418 p = *pp;
419 skip_spaces(&p);
420 v = strtol(p, (char **)&p, 10);
421 if (*p == '-') {
422 p++;
423 *min_ptr = v;
424 v = strtol(p, (char **)&p, 10);
425 *max_ptr = v;
426 } else {
427 *min_ptr = v;
428 *max_ptr = v;
429 }
430 *pp = p;
431}
432
433/* XXX: only one transport specification is parsed */
434static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
435{
436 char transport_protocol[16];
437 char profile[16];
438 char lower_transport[16];
439 char parameter[16];
440 RTSPTransportField *th;
441 char buf[256];
442
443 reply->nb_transports = 0;
444
445 for(;;) {
446 skip_spaces(&p);
447 if (*p == '\0')
448 break;
449
450 th = &reply->transports[reply->nb_transports];
451
452 get_word_sep(transport_protocol, sizeof(transport_protocol),
453 "/", &p);
454 if (*p == '/')
455 p++;
456 get_word_sep(profile, sizeof(profile), "/;,", &p);
457 lower_transport[0] = '\0';
458 if (*p == '/') {
b6892136 459 p++;
1617ad97
FB
460 get_word_sep(lower_transport, sizeof(lower_transport),
461 ";,", &p);
462 }
b6892136 463 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
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464 th->protocol = RTSP_PROTOCOL_RTP_TCP;
465 else
466 th->protocol = RTSP_PROTOCOL_RTP_UDP;
467
468 if (*p == ';')
469 p++;
470 /* get each parameter */
471 while (*p != '\0' && *p != ',') {
472 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
473 if (!strcmp(parameter, "port")) {
474 if (*p == '=') {
475 p++;
476 rtsp_parse_range(&th->port_min, &th->port_max, &p);
477 }
478 } else if (!strcmp(parameter, "client_port")) {
479 if (*p == '=') {
480 p++;
481 rtsp_parse_range(&th->client_port_min,
482 &th->client_port_max, &p);
483 }
484 } else if (!strcmp(parameter, "server_port")) {
485 if (*p == '=') {
486 p++;
487 rtsp_parse_range(&th->server_port_min,
488 &th->server_port_max, &p);
489 }
490 } else if (!strcmp(parameter, "interleaved")) {
491 if (*p == '=') {
492 p++;
493 rtsp_parse_range(&th->interleaved_min,
494 &th->interleaved_max, &p);
495 }
496 } else if (!strcmp(parameter, "multicast")) {
497 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
498 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
499 } else if (!strcmp(parameter, "ttl")) {
500 if (*p == '=') {
501 p++;
502 th->ttl = strtol(p, (char **)&p, 10);
503 }
504 } else if (!strcmp(parameter, "destination")) {
505 struct in_addr ipaddr;
506
507 if (*p == '=') {
508 p++;
509 get_word_sep(buf, sizeof(buf), ";,", &p);
510 if (inet_aton(buf, &ipaddr))
511 th->destination = ntohl(ipaddr.s_addr);
512 }
513 }
514 while (*p != ';' && *p != '\0' && *p != ',')
515 p++;
516 if (*p == ';')
517 p++;
518 }
519 if (*p == ',')
520 p++;
521
522 reply->nb_transports++;
523 }
524}
525
ff762d6e
FB
526static void rtsp_parse_range_npt(RTSPHeader *reply, const char *p)
527{
528 char buf[256];
529
530 skip_spaces(&p);
531 if (!stristart(p, "npt=", &p))
532 return;
533
534 reply->range_start = AV_NOPTS_VALUE;
535 reply->range_end = AV_NOPTS_VALUE;
536
537 get_word_sep(buf, sizeof(buf), "-", &p);
538 reply->range_start = parse_date(buf, 1);
539 if (*p == '-') {
540 p++;
541 get_word_sep(buf, sizeof(buf), "-", &p);
542 reply->range_end = parse_date(buf, 1);
543 }
544}
545
1617ad97
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546void rtsp_parse_line(RTSPHeader *reply, const char *buf)
547{
548 const char *p;
549
550 /* NOTE: we do case independent match for broken servers */
551 p = buf;
552 if (stristart(p, "Session:", &p)) {
553 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
554 } else if (stristart(p, "Content-Length:", &p)) {
555 reply->content_length = strtol(p, NULL, 10);
556 } else if (stristart(p, "Transport:", &p)) {
557 rtsp_parse_transport(reply, p);
558 } else if (stristart(p, "CSeq:", &p)) {
559 reply->seq = strtol(p, NULL, 10);
ff762d6e
FB
560 } else if (stristart(p, "Range:", &p)) {
561 rtsp_parse_range_npt(reply, p);
1617ad97
FB
562 }
563}
564
2a42b5c3
LS
565static int url_readbuf(URLContext *h, unsigned char *buf, int size)
566{
567 int ret, len;
568
569 len = 0;
570 while (len < size) {
571 ret = url_read(h, buf+len, size-len);
572 if (ret < 1)
573 return ret;
574 len += ret;
575 }
576 return len;
577}
578
b7b8fc34
FB
579/* skip a RTP/TCP interleaved packet */
580static void rtsp_skip_packet(AVFormatContext *s)
581{
582 RTSPState *rt = s->priv_data;
583 int ret, len, len1;
584 uint8_t buf[1024];
585
2a42b5c3 586 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
587 if (ret != 3)
588 return;
589 len = (buf[1] << 8) | buf[2];
590#ifdef DEBUG
591 printf("skipping RTP packet len=%d\n", len);
592#endif
593 /* skip payload */
594 while (len > 0) {
595 len1 = len;
596 if (len1 > sizeof(buf))
597 len1 = sizeof(buf);
2a42b5c3 598 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
599 if (ret != len1)
600 return;
601 len -= len1;
602 }
603}
1617ad97
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604
605static void rtsp_send_cmd(AVFormatContext *s,
606 const char *cmd, RTSPHeader *reply,
607 unsigned char **content_ptr)
608{
609 RTSPState *rt = s->priv_data;
610 char buf[4096], buf1[1024], *q;
611 unsigned char ch;
612 const char *p;
613 int content_length, line_count;
614 unsigned char *content = NULL;
615
616 memset(reply, 0, sizeof(RTSPHeader));
617
618 rt->seq++;
619 pstrcpy(buf, sizeof(buf), cmd);
b6892136 620 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1617ad97
FB
621 pstrcat(buf, sizeof(buf), buf1);
622 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 623 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
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FB
624 pstrcat(buf, sizeof(buf), buf1);
625 }
b6892136 626 pstrcat(buf, sizeof(buf), "\r\n");
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627#ifdef DEBUG
628 printf("Sending:\n%s--\n", buf);
629#endif
630 url_write(rt->rtsp_hd, buf, strlen(buf));
631
632 /* parse reply (XXX: use buffers) */
633 line_count = 0;
634 rt->last_reply[0] = '\0';
635 for(;;) {
636 q = buf;
637 for(;;) {
2a42b5c3 638 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
639 break;
640 if (ch == '\n')
641 break;
b7b8fc34
FB
642 if (ch == '$') {
643 /* XXX: only parse it if first char on line ? */
644 rtsp_skip_packet(s);
645 } else if (ch != '\r') {
1617ad97
FB
646 if ((q - buf) < sizeof(buf) - 1)
647 *q++ = ch;
648 }
649 }
650 *q = '\0';
651#ifdef DEBUG
652 printf("line='%s'\n", buf);
653#endif
654 /* test if last line */
655 if (buf[0] == '\0')
656 break;
657 p = buf;
658 if (line_count == 0) {
659 /* get reply code */
660 get_word(buf1, sizeof(buf1), &p);
661 get_word(buf1, sizeof(buf1), &p);
662 reply->status_code = atoi(buf1);
663 } else {
664 rtsp_parse_line(reply, p);
665 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
666 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
667 }
668 line_count++;
669 }
670
671 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
672 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
673
674 content_length = reply->content_length;
675 if (content_length > 0) {
676 /* leave some room for a trailing '\0' (useful for simple parsing) */
677 content = av_malloc(content_length + 1);
2a42b5c3 678 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
679 content[content_length] = '\0';
680 }
681 if (content_ptr)
682 *content_ptr = content;
683}
684
685/* useful for modules: set RTSP callback function */
686
687void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
688{
689 ff_rtsp_callback = rtsp_cb;
690}
691
692
8b1ab7bf
FB
693/* close and free RTSP streams */
694static void rtsp_close_streams(RTSPState *rt)
695{
696 int i;
697 RTSPStream *rtsp_st;
698
699 for(i=0;i<rt->nb_rtsp_streams;i++) {
700 rtsp_st = rt->rtsp_streams[i];
701 if (rtsp_st) {
702 if (rtsp_st->rtp_ctx)
703 rtp_parse_close(rtsp_st->rtp_ctx);
704 if (rtsp_st->rtp_handle)
705 url_close(rtsp_st->rtp_handle);
706 }
707 av_free(rtsp_st);
708 }
709 av_free(rt->rtsp_streams);
710}
711
1617ad97
FB
712static int rtsp_read_header(AVFormatContext *s,
713 AVFormatParameters *ap)
714{
715 RTSPState *rt = s->priv_data;
716 char host[1024], path[1024], tcpname[1024], cmd[2048];
717 URLContext *rtsp_hd;
718 int port, i, ret, err;
719 RTSPHeader reply1, *reply = &reply1;
720 unsigned char *content = NULL;
1617ad97
FB
721 RTSPStream *rtsp_st;
722 int protocol_mask;
8b1ab7bf 723 AVStream *st;
1617ad97 724
1617ad97
FB
725 /* extract hostname and port */
726 url_split(NULL, 0,
727 host, sizeof(host), &port, path, sizeof(path), s->filename);
728 if (port < 0)
729 port = RTSP_DEFAULT_PORT;
730
731 /* open the tcp connexion */
732 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
733 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
734 return AVERROR_IO;
735 rt->rtsp_hd = rtsp_hd;
736 rt->seq = 0;
737
738 /* describe the stream */
739 snprintf(cmd, sizeof(cmd),
b6892136
FB
740 "DESCRIBE %s RTSP/1.0\r\n"
741 "Accept: application/sdp\r\n",
1617ad97
FB
742 s->filename);
743 rtsp_send_cmd(s, cmd, reply, &content);
744 if (!content) {
745 err = AVERROR_INVALIDDATA;
746 goto fail;
747 }
748 if (reply->status_code != RTSP_STATUS_OK) {
749 err = AVERROR_INVALIDDATA;
750 goto fail;
751 }
752
753 /* now we got the SDP description, we parse it */
754 ret = sdp_parse(s, (const char *)content);
755 av_freep(&content);
756 if (ret < 0) {
757 err = AVERROR_INVALIDDATA;
758 goto fail;
759 }
760
761 protocol_mask = rtsp_default_protocols;
762
763 /* for each stream, make the setup request */
764 /* XXX: we assume the same server is used for the control of each
765 RTSP stream */
8b1ab7bf 766 for(i=0;i<rt->nb_rtsp_streams;i++) {
1617ad97
FB
767 char transport[2048];
768
8b1ab7bf 769 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
770
771 /* compute available transports */
772 transport[0] = '\0';
773
774 /* RTP/UDP */
775 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
85fb7b34
FB
776 char buf[256];
777 int j;
778
779 /* first try in specified port range */
780 if (rtsp_rtp_port_min != 0) {
781 for(j=rtsp_rtp_port_min;j<=rtsp_rtp_port_max;j++) {
782 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
8b1ab7bf 783 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDONLY) == 0)
85fb7b34
FB
784 goto rtp_opened;
785 }
1617ad97 786 }
85fb7b34
FB
787
788 /* then try on any port */
8b1ab7bf
FB
789 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
790 err = AVERROR_INVALIDDATA;
791 goto fail;
85fb7b34
FB
792 }
793
794 rtp_opened:
8b1ab7bf 795 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97
FB
796 if (transport[0] != '\0')
797 pstrcat(transport, sizeof(transport), ",");
798 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
799 "RTP/AVP/UDP;unicast;client_port=%d-%d",
800 port, port + 1);
801 }
802
803 /* RTP/TCP */
804 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
805 if (transport[0] != '\0')
806 pstrcat(transport, sizeof(transport), ",");
807 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
808 "RTP/AVP/TCP");
809 }
810
811 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
812 if (transport[0] != '\0')
813 pstrcat(transport, sizeof(transport), ",");
814 snprintf(transport + strlen(transport),
815 sizeof(transport) - strlen(transport) - 1,
816 "RTP/AVP/UDP;multicast");
817 }
1617ad97 818 snprintf(cmd, sizeof(cmd),
b6892136
FB
819 "SETUP %s RTSP/1.0\r\n"
820 "Transport: %s\r\n",
1617ad97
FB
821 rtsp_st->control_url, transport);
822 rtsp_send_cmd(s, cmd, reply, NULL);
823 if (reply->status_code != RTSP_STATUS_OK ||
824 reply->nb_transports != 1) {
825 err = AVERROR_INVALIDDATA;
826 goto fail;
827 }
828
829 /* XXX: same protocol for all streams is required */
830 if (i > 0) {
831 if (reply->transports[0].protocol != rt->protocol) {
832 err = AVERROR_INVALIDDATA;
833 goto fail;
834 }
835 } else {
836 rt->protocol = reply->transports[0].protocol;
837 }
838
839 /* close RTP connection if not choosen */
840 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
841 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
8b1ab7bf
FB
842 url_close(rtsp_st->rtp_handle);
843 rtsp_st->rtp_handle = NULL;
1617ad97
FB
844 }
845
846 switch(reply->transports[0].protocol) {
847 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
848 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
849 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
850 break;
851
852 case RTSP_PROTOCOL_RTP_UDP:
853 {
854 char url[1024];
855
856 /* XXX: also use address if specified */
857 snprintf(url, sizeof(url), "rtp://%s:%d",
858 host, reply->transports[0].server_port_min);
8b1ab7bf 859 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
860 err = AVERROR_INVALIDDATA;
861 goto fail;
862 }
863 }
864 break;
865 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
866 {
867 char url[1024];
868 int ttl;
869
1617ad97
FB
870 ttl = reply->transports[0].ttl;
871 if (!ttl)
872 ttl = 16;
873 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
874 host,
875 reply->transports[0].server_port_min,
876 ttl);
8b1ab7bf 877 if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) {
1617ad97
FB
878 err = AVERROR_INVALIDDATA;
879 goto fail;
880 }
881 }
882 break;
883 }
8b1ab7bf
FB
884 /* open the RTP context */
885 st = NULL;
886 if (rtsp_st->stream_index >= 0)
887 st = s->streams[rtsp_st->stream_index];
888 if (!st)
889 s->ctx_flags |= AVFMTCTX_NOHEADER;
890 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type);
891 if (!rtsp_st->rtp_ctx) {
892 err = AVERROR_NOMEM;
893 goto fail;
894 }
1617ad97
FB
895 }
896
897 /* use callback if available to extend setup */
898 if (ff_rtsp_callback) {
899 if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
900 NULL, 0, rt->last_reply) < 0) {
901 err = AVERROR_INVALIDDATA;
902 goto fail;
903 }
904 }
905
1617ad97 906
ff762d6e
FB
907 rt->state = RTSP_STATE_IDLE;
908 rt->seek_timestamp = 0; /* default is to start stream at position
909 zero */
910 if (ap && ap->initial_pause) {
911 /* do not start immediately */
912 } else {
913 if (rtsp_read_play(s) < 0) {
914 err = AVERROR_INVALIDDATA;
1617ad97
FB
915 goto fail;
916 }
917 }
1617ad97
FB
918 return 0;
919 fail:
8b1ab7bf 920 rtsp_close_streams(rt);
1617ad97
FB
921 av_freep(&content);
922 url_close(rt->rtsp_hd);
923 return err;
924}
925
8b1ab7bf
FB
926static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
927 uint8_t *buf, int buf_size)
1617ad97
FB
928{
929 RTSPState *rt = s->priv_data;
b6892136 930 int id, len, i, ret;
1617ad97 931 RTSPStream *rtsp_st;
1617ad97 932
b6892136
FB
933#ifdef DEBUG_RTP_TCP
934 printf("tcp_read_packet:\n");
935#endif
1617ad97
FB
936 redo:
937 for(;;) {
2a42b5c3 938 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
939#ifdef DEBUG_RTP_TCP
940 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
941#endif
942 if (ret != 1)
8b1ab7bf 943 return -1;
b6892136 944 if (buf[0] == '$')
1617ad97
FB
945 break;
946 }
2a42b5c3 947 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 948 if (ret != 3)
8b1ab7bf 949 return -1;
b6892136
FB
950 id = buf[0];
951 len = (buf[1] << 8) | buf[2];
952#ifdef DEBUG_RTP_TCP
953 printf("id=%d len=%d\n", id, len);
954#endif
8b1ab7bf 955 if (len > buf_size || len < 12)
1617ad97
FB
956 goto redo;
957 /* get the data */
2a42b5c3 958 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 959 if (ret != len)
8b1ab7bf 960 return -1;
b6892136 961
1617ad97 962 /* find the matching stream */
8b1ab7bf
FB
963 for(i = 0; i < rt->nb_rtsp_streams; i++) {
964 rtsp_st = rt->rtsp_streams[i];
b6892136
FB
965 if (id >= rtsp_st->interleaved_min &&
966 id <= rtsp_st->interleaved_max)
1617ad97
FB
967 goto found;
968 }
969 goto redo;
970 found:
8b1ab7bf
FB
971 *prtsp_st = rtsp_st;
972 return len;
1617ad97
FB
973}
974
8b1ab7bf
FB
975static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
976 uint8_t *buf, int buf_size)
1617ad97 977{
8b1ab7bf 978 RTSPState *rt = s->priv_data;
1617ad97
FB
979 RTSPStream *rtsp_st;
980 fd_set rfds;
981 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
982 struct timeval tv;
983
984 for(;;) {
b7b8fc34 985 if (url_interrupt_cb())
8b1ab7bf 986 return -1;
1617ad97
FB
987 FD_ZERO(&rfds);
988 fd_max = -1;
8b1ab7bf
FB
989 for(i = 0; i < rt->nb_rtsp_streams; i++) {
990 rtsp_st = rt->rtsp_streams[i];
1617ad97 991 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 992 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
993 if (fd1 > fd_max)
994 fd_max = fd1;
995 FD_SET(fd1, &rfds);
996 }
1617ad97 997 tv.tv_sec = 0;
b7b8fc34 998 tv.tv_usec = 100 * 1000;
1617ad97
FB
999 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1000 if (n > 0) {
8b1ab7bf
FB
1001 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1002 rtsp_st = rt->rtsp_streams[i];
1003 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1004 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1005 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1006 if (ret > 0) {
1007 *prtsp_st = rtsp_st;
1617ad97
FB
1008 return ret;
1009 }
1010 }
1011 }
1012 }
1013 }
1014}
1015
1016static int rtsp_read_packet(AVFormatContext *s,
1017 AVPacket *pkt)
1018{
1019 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1020 RTSPStream *rtsp_st;
1021 int ret, len;
1022 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1023
1024 /* get next frames from the same RTP packet */
1025 if (rt->cur_rtp) {
1026 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1027 if (ret == 0) {
1028 rt->cur_rtp = NULL;
1029 return 0;
1030 } else if (ret == 1) {
1031 return 0;
1032 } else {
1033 rt->cur_rtp = NULL;
1034 }
1035 }
1617ad97 1036
8b1ab7bf
FB
1037 /* read next RTP packet */
1038 redo:
1617ad97
FB
1039 switch(rt->protocol) {
1040 default:
1041 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1042 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1043 break;
1044 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1045 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1046 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1047 break;
1048 }
8b1ab7bf
FB
1049 if (len < 0)
1050 return AVERROR_IO;
1051 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1052 if (ret < 0)
1053 goto redo;
1054 if (ret == 1) {
1055 /* more packets may follow, so we save the RTP context */
1056 rt->cur_rtp = rtsp_st->rtp_ctx;
1057 }
1058 return 0;
1617ad97
FB
1059}
1060
ff762d6e 1061static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1062{
ff762d6e 1063 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1064 RTSPHeader reply1, *reply = &reply1;
1065 char cmd[1024];
1066
bc874dae 1067 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1068
1069 if (rt->state == RTSP_STATE_PAUSED) {
1070 snprintf(cmd, sizeof(cmd),
1071 "PLAY %s RTSP/1.0\r\n",
1072 s->filename);
1073 } else {
1074 snprintf(cmd, sizeof(cmd),
1075 "PLAY %s RTSP/1.0\r\n"
1076 "Range: npt=%0.3f-\r\n",
1077 s->filename,
1078 (double)rt->seek_timestamp / AV_TIME_BASE);
1079 }
b7b8fc34
FB
1080 rtsp_send_cmd(s, cmd, reply, NULL);
1081 if (reply->status_code != RTSP_STATUS_OK) {
1082 return -1;
1083 } else {
ff762d6e 1084 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1085 return 0;
1086 }
1087}
1088
ff762d6e
FB
1089/* pause the stream */
1090static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1091{
ff762d6e 1092 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1093 RTSPHeader reply1, *reply = &reply1;
1094 char cmd[1024];
1095
b7b8fc34
FB
1096 rt = s->priv_data;
1097
ff762d6e
FB
1098 if (rt->state != RTSP_STATE_PLAYING)
1099 return 0;
1100
b7b8fc34 1101 snprintf(cmd, sizeof(cmd),
ff762d6e 1102 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1103 s->filename);
1104 rtsp_send_cmd(s, cmd, reply, NULL);
1105 if (reply->status_code != RTSP_STATUS_OK) {
1106 return -1;
1107 } else {
ff762d6e 1108 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1109 return 0;
1110 }
1111}
1112
ff762d6e
FB
1113static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1114 int64_t timestamp)
1115{
1116 RTSPState *rt = s->priv_data;
1117
1118 rt->seek_timestamp = timestamp;
1119 switch(rt->state) {
1120 default:
1121 case RTSP_STATE_IDLE:
1122 break;
1123 case RTSP_STATE_PLAYING:
1124 if (rtsp_read_play(s) != 0)
1125 return -1;
1126 break;
1127 case RTSP_STATE_PAUSED:
1128 rt->state = RTSP_STATE_IDLE;
1129 break;
1130 }
1131 return 0;
1132}
1133
1617ad97
FB
1134static int rtsp_read_close(AVFormatContext *s)
1135{
1136 RTSPState *rt = s->priv_data;
1617ad97 1137 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1138 char cmd[1024];
1139
b6892136 1140#if 0
1617ad97
FB
1141 /* NOTE: it is valid to flush the buffer here */
1142 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1143 url_fclose(&rt->rtsp_gb);
1144 }
b6892136 1145#endif
1617ad97 1146 snprintf(cmd, sizeof(cmd),
b6892136 1147 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1148 s->filename);
1149 rtsp_send_cmd(s, cmd, reply, NULL);
1150
1151 if (ff_rtsp_callback) {
1152 ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
1153 NULL, 0, NULL);
1154 }
1155
8b1ab7bf 1156 rtsp_close_streams(rt);
1617ad97
FB
1157 url_close(rt->rtsp_hd);
1158 return 0;
1159}
1160
b7b8fc34 1161AVInputFormat rtsp_demux = {
1617ad97
FB
1162 "rtsp",
1163 "RTSP input format",
1164 sizeof(RTSPState),
1165 rtsp_probe,
1166 rtsp_read_header,
1167 rtsp_read_packet,
1168 rtsp_read_close,
ff762d6e 1169 rtsp_read_seek,
bb76a117 1170 .flags = AVFMT_NOFILE,
ff762d6e
FB
1171 .read_play = rtsp_read_play,
1172 .read_pause = rtsp_read_pause,
1617ad97
FB
1173};
1174
cb1fdc61 1175static int sdp_probe(AVProbeData *p1)
93ced3e8 1176{
cb1fdc61
FB
1177 const char *p;
1178
1179 /* we look for a line beginning "c=IN IP4" */
1180 p = p1->buf;
1181 while (*p != '\0') {
1182 if (strstart(p, "c=IN IP4", NULL))
1183 return AVPROBE_SCORE_MAX / 2;
1184 p = strchr(p, '\n');
1185 if (!p)
1186 break;
1187 p++;
1188 if (*p == '\r')
1189 p++;
1190 }
93ced3e8
FB
1191 return 0;
1192}
1193
1194#define SDP_MAX_SIZE 8192
1195
1196static int sdp_read_header(AVFormatContext *s,
1197 AVFormatParameters *ap)
1198{
8b1ab7bf 1199 RTSPState *rt = s->priv_data;
93ced3e8
FB
1200 RTSPStream *rtsp_st;
1201 int size, i, err;
1202 char *content;
1203 char url[1024];
8b1ab7bf 1204 AVStream *st;
93ced3e8
FB
1205
1206 /* read the whole sdp file */
1207 /* XXX: better loading */
1208 content = av_malloc(SDP_MAX_SIZE);
1209 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1210 if (size <= 0) {
1211 av_free(content);
1212 return AVERROR_INVALIDDATA;
1213 }
1214 content[size] ='\0';
1215
1216 sdp_parse(s, content);
1217 av_free(content);
1218
1219 /* open each RTP stream */
8b1ab7bf
FB
1220 for(i=0;i<rt->nb_rtsp_streams;i++) {
1221 rtsp_st = rt->rtsp_streams[i];
93ced3e8
FB
1222
1223 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1224 inet_ntoa(rtsp_st->sdp_ip),
1225 rtsp_st->sdp_port,
1226 rtsp_st->sdp_ttl);
8b1ab7bf 1227 if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) {
93ced3e8
FB
1228 err = AVERROR_INVALIDDATA;
1229 goto fail;
1230 }
8b1ab7bf
FB
1231 /* open the RTP context */
1232 st = NULL;
1233 if (rtsp_st->stream_index >= 0)
1234 st = s->streams[rtsp_st->stream_index];
1235 if (!st)
1236 s->ctx_flags |= AVFMTCTX_NOHEADER;
1237 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type);
1238 if (!rtsp_st->rtp_ctx) {
1239 err = AVERROR_NOMEM;
1240 goto fail;
1241 }
93ced3e8
FB
1242 }
1243 return 0;
1244 fail:
8b1ab7bf 1245 rtsp_close_streams(rt);
93ced3e8
FB
1246 return err;
1247}
1248
1249static int sdp_read_packet(AVFormatContext *s,
1250 AVPacket *pkt)
1251{
8b1ab7bf 1252 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1253}
1254
1255static int sdp_read_close(AVFormatContext *s)
1256{
8b1ab7bf
FB
1257 RTSPState *rt = s->priv_data;
1258 rtsp_close_streams(rt);
93ced3e8
FB
1259 return 0;
1260}
1261
1262
1263static AVInputFormat sdp_demux = {
1264 "sdp",
1265 "SDP",
1266 sizeof(RTSPState),
1267 sdp_probe,
1268 sdp_read_header,
1269 sdp_read_packet,
1270 sdp_read_close,
1271};
1272
1273
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1274/* dummy redirector format (used directly in av_open_input_file now) */
1275static int redir_probe(AVProbeData *pd)
1276{
1277 const char *p;
1278 p = pd->buf;
1279 while (redir_isspace(*p))
1280 p++;
1281 if (strstart(p, "http://", NULL) ||
1282 strstart(p, "rtsp://", NULL))
1283 return AVPROBE_SCORE_MAX;
1284 return 0;
1285}
1286
1287/* called from utils.c */
1288int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1289{
1290 char buf[4096], *q;
1291 int c;
1292 AVFormatContext *ic = NULL;
1293
1294 /* parse each URL and try to open it */
1295 c = url_fgetc(f);
1296 while (c != URL_EOF) {
1297 /* skip spaces */
1298 for(;;) {
1299 if (!redir_isspace(c))
1300 break;
1301 c = url_fgetc(f);
1302 }
1303 if (c == URL_EOF)
1304 break;
1305 /* record url */
1306 q = buf;
1307 for(;;) {
1308 if (c == URL_EOF || redir_isspace(c))
1309 break;
1310 if ((q - buf) < sizeof(buf) - 1)
1311 *q++ = c;
1312 c = url_fgetc(f);
1313 }
1314 *q = '\0';
1315 //printf("URL='%s'\n", buf);
1316 /* try to open the media file */
1317 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1318 break;
1319 }
1320 *ic_ptr = ic;
1321 if (!ic)
1322 return AVERROR_IO;
1323 else
1324 return 0;
1325}
1326
1327AVInputFormat redir_demux = {
1328 "redir",
1329 "Redirector format",
1330 0,
1331 redir_probe,
1332 NULL,
1333 NULL,
1334 NULL,
1335};
1336
1337int rtsp_init(void)
1338{
1339 av_register_input_format(&rtsp_demux);
1340 av_register_input_format(&redir_demux);
93ced3e8 1341 av_register_input_format(&sdp_demux);
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1342 return 0;
1343}