Implement RDTDemuxContext, which contains RDT-specific data (similar to
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
1617ad97
FB
3 * Copyright (c) 2002 Fabrice Bellard.
4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
1617ad97
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
1617ad97
FB
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
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
7246177d
AJ
22/* needed by inet_aton() */
23#define _SVID_SOURCE
24
245976da 25#include "libavutil/avstring.h"
1617ad97
FB
26#include "avformat.h"
27
db0ed93e 28#include <sys/time.h>
6ad1c9c9 29#ifdef HAVE_SYS_SELECT_H
933bd8e2 30#include <sys/select.h>
6ad1c9c9 31#endif
ea452b54 32#include <strings.h>
42572ef5 33#include "network.h"
c971ff19 34#include "rtsp.h"
1617ad97 35
4934884a 36#include "rtp_internal.h"
e9dea59f 37#include "rdt.h"
4934884a 38
1617ad97 39//#define DEBUG
b6892136 40//#define DEBUG_RTP_TCP
1617ad97 41
ff762d6e
FB
42enum RTSPClientState {
43 RTSP_STATE_IDLE,
44 RTSP_STATE_PLAYING,
45 RTSP_STATE_PAUSED,
46};
47
e0776043 48enum RTSPServerType {
2834c365 49 RTSP_SERVER_RTP, /*< Standard-compliant RTP-server */
2e889ae4 50 RTSP_SERVER_REAL, /*< Realmedia-style server */
e0776043
RB
51 RTSP_SERVER_LAST
52};
53
119b4668
RB
54enum RTSPTransport {
55 RTSP_TRANSPORT_RTP,
56 RTSP_TRANSPORT_RDT,
57 RTSP_TRANSPORT_LAST
58};
59
1617ad97
FB
60typedef struct RTSPState {
61 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
8b1ab7bf
FB
62 int nb_rtsp_streams;
63 struct RTSPStream **rtsp_streams;
115329f1 64
ff762d6e
FB
65 enum RTSPClientState state;
66 int64_t seek_timestamp;
115329f1 67
b6892136
FB
68 /* XXX: currently we use unbuffered input */
69 // ByteIOContext rtsp_gb;
1617ad97
FB
70 int seq; /* RTSP command sequence number */
71 char session_id[512];
119b4668 72 enum RTSPTransport transport;
90abbdba 73 enum RTSPLowerTransport lower_transport;
e0776043 74 enum RTSPServerType server_type;
1617ad97 75 char last_reply[2048]; /* XXX: allocate ? */
5465b0d4 76 void *cur_tx;
1256d16b 77 int need_subscription;
1617ad97
FB
78} RTSPState;
79
80typedef struct RTSPStream {
8b1ab7bf 81 URLContext *rtp_handle; /* RTP stream handle */
5465b0d4 82 void *tx_ctx; /* RTP/RDT parse context */
115329f1 83
8b1ab7bf 84 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 85 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
93ced3e8
FB
86 char control_url[1024]; /* url for this stream (from SDP) */
87
88 int sdp_port; /* port (from SDP content - not used in RTSP) */
89 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
90 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
91 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 92 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
4934884a
RM
93
94 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
ed0aacc7 95 PayloadContext *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
1617ad97
FB
96} RTSPStream;
97
ff762d6e
FB
98static int rtsp_read_play(AVFormatContext *s);
99
1617ad97
FB
100/* XXX: currently, the only way to change the protocols consists in
101 changing this variable */
1617ad97 102
c482500f 103#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 104int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 105#endif
85fb7b34 106
1617ad97
FB
107static int rtsp_probe(AVProbeData *p)
108{
f7d78f36 109 if (av_strstart(p->filename, "rtsp:", NULL))
1617ad97
FB
110 return AVPROBE_SCORE_MAX;
111 return 0;
112}
113
114static int redir_isspace(int c)
115{
ccd425e7 116 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
1617ad97
FB
117}
118
119static void skip_spaces(const char **pp)
120{
121 const char *p;
122 p = *pp;
123 while (redir_isspace(*p))
124 p++;
125 *pp = p;
126}
127
115329f1 128static void get_word_sep(char *buf, int buf_size, const char *sep,
1617ad97
FB
129 const char **pp)
130{
131 const char *p;
132 char *q;
133
134 p = *pp;
d1ccf0e0
RD
135 if (*p == '/')
136 p++;
1617ad97
FB
137 skip_spaces(&p);
138 q = buf;
139 while (!strchr(sep, *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
149static void get_word(char *buf, int buf_size, const char **pp)
150{
151 const char *p;
152 char *q;
153
154 p = *pp;
155 skip_spaces(&p);
156 q = buf;
157 while (!redir_isspace(*p) && *p != '\0') {
158 if ((q - buf) < buf_size - 1)
159 *q++ = *p;
160 p++;
161 }
162 if (buf_size > 0)
163 *q = '\0';
164 *pp = p;
165}
166
93ced3e8
FB
167/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
168 params>] */
4934884a 169static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
93ced3e8
FB
170{
171 char buf[256];
d1ccf0e0
RD
172 int i;
173 AVCodec *c;
7b49ce2e 174 const char *c_name;
93ced3e8 175
d1ccf0e0
RD
176 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
177 see if we can handle this kind of payload */
93ced3e8 178 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 179 if (payload_type >= RTP_PT_PRIVATE) {
4934884a
RM
180 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
181 while(handler) {
182 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
183 codec->codec_id = handler->codec_id;
184 rtsp_st->dynamic_handler= handler;
185 if(handler->open) {
186 rtsp_st->dynamic_protocol_context= handler->open();
187 }
d1ccf0e0
RD
188 break;
189 }
4934884a
RM
190 handler= handler->next;
191 }
93ced3e8 192 } else {
d1ccf0e0
RD
193 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
194 /* search into AVRtpPayloadTypes[] */
7ed19d7f 195 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
196 }
197
198 c = avcodec_find_decoder(codec->codec_id);
199 if (c && c->name)
7b49ce2e 200 c_name = c->name;
d1ccf0e0
RD
201 else
202 c_name = (char *)NULL;
203
204 if (c_name) {
205 get_word_sep(buf, sizeof(buf), "/", &p);
206 i = atoi(buf);
207 switch (codec->codec_type) {
208 case CODEC_TYPE_AUDIO:
209 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
210 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
211 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
212 if (i > 0) {
213 codec->sample_rate = i;
214 get_word_sep(buf, sizeof(buf), "/", &p);
215 i = atoi(buf);
216 if (i > 0)
217 codec->channels = i;
d0deedcb
RM
218 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
219 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
d1ccf0e0
RD
220 }
221 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
222 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
223 break;
224 case CODEC_TYPE_VIDEO:
225 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
226 break;
227 default:
228 break;
229 }
230 return 0;
93ced3e8 231 }
d1ccf0e0
RD
232
233 return -1;
93ced3e8
FB
234}
235
236/* return the length and optionnaly the data */
237static int hex_to_data(uint8_t *data, const char *p)
238{
239 int c, len, v;
240
241 len = 0;
242 v = 1;
243 for(;;) {
244 skip_spaces(&p);
245 if (p == '\0')
246 break;
247 c = toupper((unsigned char)*p++);
248 if (c >= '0' && c <= '9')
249 c = c - '0';
250 else if (c >= 'A' && c <= 'F')
251 c = c - 'A' + 10;
252 else
253 break;
254 v = (v << 4) | c;
255 if (v & 0x100) {
256 if (data)
257 data[len] = v;
258 len++;
259 v = 1;
260 }
261 }
262 return len;
263}
264
d1ccf0e0
RD
265static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
266{
267 switch (codec->codec_id) {
268 case CODEC_ID_MPEG4:
cbee7a69 269 case CODEC_ID_AAC:
d1ccf0e0
RD
270 if (!strcmp(attr, "config")) {
271 /* decode the hexa encoded parameter */
272 int len = hex_to_data(NULL, value);
273 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
274 if (!codec->extradata)
275 return;
276 codec->extradata_size = len;
277 hex_to_data(codec->extradata, value);
278 }
279 break;
280 default:
281 break;
282 }
283 return;
284}
285
286typedef struct attrname_map
287{
7b49ce2e 288 const char *str;
d1ccf0e0
RD
289 uint16_t type;
290 uint32_t offset;
291} attrname_map_t;
292
293/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
294#define ATTR_NAME_TYPE_INT 0
295#define ATTR_NAME_TYPE_STR 1
9b5ede5b 296static const attrname_map_t attr_names[]=
d1ccf0e0
RD
297{
298 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
299 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
300 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
301 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
302 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
303 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
304 {NULL, -1, -1},
305};
306
d0deedcb
RM
307/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
308* because it is used in rtp_h264.c, which is forthcoming.
309*/
310int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
311{
312 skip_spaces(p);
313 if(**p)
314 {
315 get_word_sep(attr, attr_size, "=", p);
316 if (**p == '=')
317 (*p)++;
318 get_word_sep(value, value_size, ";", p);
319 if (**p == ';')
320 (*p)++;
321 return 1;
322 }
323 return 0;
324}
325
d1ccf0e0
RD
326/* parse a SDP line and save stream attributes */
327static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
328{
329 char attr[256];
330 char value[4096];
d1ccf0e0
RD
331 int i;
332
333 RTSPStream *rtsp_st = st->priv_data;
01f4895c 334 AVCodecContext *codec = st->codec;
d1ccf0e0 335 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
336
337 /* loop on each attribute */
1ad20f96
RM
338 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
339 {
bb270c08 340 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
341 sdp_parse_fmtp_config(codec, attr, value);
342 /* Looking for a known attribute */
343 for (i = 0; attr_names[i].str; ++i) {
344 if (!strcasecmp(attr, attr_names[i].str)) {
345 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
346 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
347 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
348 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 349 }
93ced3e8 350 }
93ced3e8
FB
351 }
352}
353
31693e00
RM
354/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
355 * and end time.
356 * Used for seeking in the rtp stream.
357 */
358static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
359{
360 char buf[256];
361
362 skip_spaces(&p);
f7d78f36 363 if (!av_stristart(p, "npt=", &p))
31693e00
RM
364 return;
365
366 *start = AV_NOPTS_VALUE;
367 *end = AV_NOPTS_VALUE;
368
369 get_word_sep(buf, sizeof(buf), "-", &p);
370 *start = parse_date(buf, 1);
371 if (*p == '-') {
372 p++;
373 get_word_sep(buf, sizeof(buf), "-", &p);
374 *end = parse_date(buf, 1);
375 }
376// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
377// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
378}
379
93ced3e8
FB
380typedef struct SDPParseState {
381 /* SDP only */
382 struct in_addr default_ip;
383 int default_ttl;
384} SDPParseState;
385
386static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
387 int letter, const char *buf)
388{
8b1ab7bf 389 RTSPState *rt = s->priv_data;
1617ad97
FB
390 char buf1[64], st_type[64];
391 const char *p;
fb65d2ca
DP
392 enum CodecType codec_type;
393 int payload_type, i;
1617ad97
FB
394 AVStream *st;
395 RTSPStream *rtsp_st;
93ced3e8
FB
396 struct in_addr sdp_ip;
397 int ttl;
398
1617ad97
FB
399#ifdef DEBUG
400 printf("sdp: %c='%s'\n", letter, buf);
401#endif
402
403 p = buf;
404 switch(letter) {
93ced3e8
FB
405 case 'c':
406 get_word(buf1, sizeof(buf1), &p);
407 if (strcmp(buf1, "IN") != 0)
408 return;
409 get_word(buf1, sizeof(buf1), &p);
410 if (strcmp(buf1, "IP4") != 0)
411 return;
412 get_word_sep(buf1, sizeof(buf1), "/", &p);
413 if (inet_aton(buf1, &sdp_ip) == 0)
414 return;
415 ttl = 16;
416 if (*p == '/') {
417 p++;
418 get_word_sep(buf1, sizeof(buf1), "/", &p);
419 ttl = atoi(buf1);
420 }
421 if (s->nb_streams == 0) {
422 s1->default_ip = sdp_ip;
423 s1->default_ttl = ttl;
424 } else {
425 st = s->streams[s->nb_streams - 1];
426 rtsp_st = st->priv_data;
427 rtsp_st->sdp_ip = sdp_ip;
428 rtsp_st->sdp_ttl = ttl;
429 }
430 break;
1617ad97 431 case 's':
75e61b0e 432 av_strlcpy(s->title, p, sizeof(s->title));
1617ad97
FB
433 break;
434 case 'i':
435 if (s->nb_streams == 0) {
75e61b0e 436 av_strlcpy(s->comment, p, sizeof(s->comment));
1617ad97
FB
437 break;
438 }
439 break;
440 case 'm':
441 /* new stream */
442 get_word(st_type, sizeof(st_type), &p);
443 if (!strcmp(st_type, "audio")) {
444 codec_type = CODEC_TYPE_AUDIO;
445 } else if (!strcmp(st_type, "video")) {
446 codec_type = CODEC_TYPE_VIDEO;
447 } else {
448 return;
449 }
1617ad97
FB
450 rtsp_st = av_mallocz(sizeof(RTSPStream));
451 if (!rtsp_st)
452 return;
8b1ab7bf
FB
453 rtsp_st->stream_index = -1;
454 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
455
456 rtsp_st->sdp_ip = s1->default_ip;
457 rtsp_st->sdp_ttl = s1->default_ttl;
458
93ced3e8
FB
459 get_word(buf1, sizeof(buf1), &p); /* port */
460 rtsp_st->sdp_port = atoi(buf1);
461
462 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 463
93ced3e8
FB
464 /* XXX: handle list of formats */
465 get_word(buf1, sizeof(buf1), &p); /* format list */
466 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 467
7ed19d7f 468 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
469 /* no corresponding stream */
470 } else {
471 st = av_new_stream(s, 0);
472 if (!st)
473 return;
474 st->priv_data = rtsp_st;
475 rtsp_st->stream_index = st->index;
01f4895c 476 st->codec->codec_type = codec_type;
d1ccf0e0 477 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 478 /* if standard payload type, we can find the codec right now */
01f4895c 479 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
480 }
481 }
1617ad97 482 /* put a default control url */
75e61b0e 483 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1617ad97
FB
484 break;
485 case 'a':
f7d78f36 486 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
1617ad97
FB
487 char proto[32];
488 /* get the control url */
489 st = s->streams[s->nb_streams - 1];
490 rtsp_st = st->priv_data;
115329f1 491
1617ad97 492 /* XXX: may need to add full url resolution */
6ba5cbc6 493 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
494 if (proto[0] == '\0') {
495 /* relative control URL */
75e61b0e
MR
496 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
497 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 498 } else {
75e61b0e 499 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 500 }
f7d78f36 501 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 502 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 503 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
504 payload_type = atoi(buf1);
505 for(i = 0; i < s->nb_streams;i++) {
506 st = s->streams[i];
507 rtsp_st = st->priv_data;
508 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 509 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
FB
510 }
511 }
f7d78f36 512 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 513 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 514 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
515 payload_type = atoi(buf1);
516 for(i = 0; i < s->nb_streams;i++) {
517 st = s->streams[i];
518 rtsp_st = st->priv_data;
519 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a
RM
520 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
521 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
522 sdp_parse_fmtp(st, p);
523 }
524 } else {
ed787542 525 sdp_parse_fmtp(st, p);
4934884a 526 }
93ced3e8
FB
527 }
528 }
f7d78f36 529 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
530 // let dynamic protocol handlers have a stab at the line.
531 get_word(buf1, sizeof(buf1), &p);
532 payload_type = atoi(buf1);
533 for(i = 0; i < s->nb_streams;i++) {
534 st = s->streams[i];
535 rtsp_st = st->priv_data;
536 if (rtsp_st->sdp_payload_type == payload_type) {
537 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
538 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
539 }
540 }
541 }
f7d78f36 542 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
543 int64_t start, end;
544
545 // this is so that seeking on a streamed file can work.
546 rtsp_parse_range_npt(p, &start, &end);
547 s->start_time= start;
548 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
119b4668
RB
549 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
550 if (atoi(p) == 1)
551 rt->transport = RTSP_TRANSPORT_RDT;
8646b907
RB
552 } else if (s->nb_streams > 0) {
553 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
554 if (rtsp_st->dynamic_handler &&
555 rtsp_st->dynamic_handler->parse_sdp_a_line)
556 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
557 rtsp_st->dynamic_protocol_context, buf);
1617ad97
FB
558 }
559 break;
560 }
561}
562
5c91a675 563static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
564{
565 const char *p;
566 int letter;
d6bb9ebd 567 char buf[2048], *q;
93ced3e8 568 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 569
93ced3e8 570 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
571 p = content;
572 for(;;) {
573 skip_spaces(&p);
574 letter = *p;
575 if (letter == '\0')
576 break;
577 p++;
578 if (*p != '=')
579 goto next_line;
580 p++;
581 /* get the content */
582 q = buf;
b6892136 583 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
584 if ((q - buf) < sizeof(buf) - 1)
585 *q++ = *p;
586 p++;
587 }
588 *q = '\0';
93ced3e8 589 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
590 next_line:
591 while (*p != '\n' && *p != '\0')
592 p++;
593 if (*p == '\n')
594 p++;
595 }
596 return 0;
597}
598
599static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
600{
601 const char *p;
602 int v;
603
604 p = *pp;
605 skip_spaces(&p);
606 v = strtol(p, (char **)&p, 10);
607 if (*p == '-') {
608 p++;
609 *min_ptr = v;
610 v = strtol(p, (char **)&p, 10);
611 *max_ptr = v;
612 } else {
613 *min_ptr = v;
614 *max_ptr = v;
615 }
616 *pp = p;
617}
618
619/* XXX: only one transport specification is parsed */
620static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
621{
622 char transport_protocol[16];
623 char profile[16];
624 char lower_transport[16];
625 char parameter[16];
626 RTSPTransportField *th;
627 char buf[256];
115329f1 628
1617ad97 629 reply->nb_transports = 0;
115329f1 630
1617ad97
FB
631 for(;;) {
632 skip_spaces(&p);
633 if (*p == '\0')
634 break;
635
636 th = &reply->transports[reply->nb_transports];
637
115329f1 638 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
639 "/", &p);
640 if (*p == '/')
641 p++;
e1502118 642 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
643 get_word_sep(profile, sizeof(profile), "/;,", &p);
644 lower_transport[0] = '\0';
645 /* rtp/avp/<protocol> */
646 if (*p == '/') {
647 p++;
648 get_word_sep(lower_transport, sizeof(lower_transport),
649 ";,", &p);
119b4668
RB
650 }
651 th->transport = RTSP_TRANSPORT_RTP;
652 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
653 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 654 /* x-pn-tng/<protocol> */
e1502118
LB
655 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
656 profile[0] = '\0';
119b4668 657 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 658 }
b6892136 659 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 660 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 661 else
90abbdba 662 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 663
1617ad97
FB
664 if (*p == ';')
665 p++;
666 /* get each parameter */
667 while (*p != '\0' && *p != ',') {
668 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
669 if (!strcmp(parameter, "port")) {
670 if (*p == '=') {
671 p++;
672 rtsp_parse_range(&th->port_min, &th->port_max, &p);
673 }
674 } else if (!strcmp(parameter, "client_port")) {
675 if (*p == '=') {
676 p++;
115329f1 677 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
678 &th->client_port_max, &p);
679 }
680 } else if (!strcmp(parameter, "server_port")) {
681 if (*p == '=') {
682 p++;
115329f1 683 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
684 &th->server_port_max, &p);
685 }
686 } else if (!strcmp(parameter, "interleaved")) {
687 if (*p == '=') {
688 p++;
115329f1 689 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
690 &th->interleaved_max, &p);
691 }
692 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
693 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
694 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
695 } else if (!strcmp(parameter, "ttl")) {
696 if (*p == '=') {
697 p++;
698 th->ttl = strtol(p, (char **)&p, 10);
699 }
700 } else if (!strcmp(parameter, "destination")) {
701 struct in_addr ipaddr;
702
703 if (*p == '=') {
704 p++;
705 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 706 if (inet_aton(buf, &ipaddr))
1617ad97
FB
707 th->destination = ntohl(ipaddr.s_addr);
708 }
709 }
710 while (*p != ';' && *p != '\0' && *p != ',')
711 p++;
712 if (*p == ';')
713 p++;
714 }
715 if (*p == ',')
716 p++;
717
718 reply->nb_transports++;
719 }
720}
721
722void rtsp_parse_line(RTSPHeader *reply, const char *buf)
723{
724 const char *p;
725
726 /* NOTE: we do case independent match for broken servers */
727 p = buf;
f7d78f36 728 if (av_stristart(p, "Session:", &p)) {
1617ad97 729 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 730 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 731 reply->content_length = strtol(p, NULL, 10);
f7d78f36 732 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 733 rtsp_parse_transport(reply, p);
f7d78f36 734 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 735 reply->seq = strtol(p, NULL, 10);
f7d78f36 736 } else if (av_stristart(p, "Range:", &p)) {
31693e00 737 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
738 } else if (av_stristart(p, "RealChallenge1:", &p)) {
739 skip_spaces(&p);
740 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1617ad97
FB
741 }
742}
743
2a42b5c3
LS
744static int url_readbuf(URLContext *h, unsigned char *buf, int size)
745{
746 int ret, len;
747
748 len = 0;
749 while (len < size) {
750 ret = url_read(h, buf+len, size-len);
751 if (ret < 1)
752 return ret;
753 len += ret;
754 }
755 return len;
756}
757
b7b8fc34
FB
758/* skip a RTP/TCP interleaved packet */
759static void rtsp_skip_packet(AVFormatContext *s)
760{
761 RTSPState *rt = s->priv_data;
762 int ret, len, len1;
763 uint8_t buf[1024];
764
2a42b5c3 765 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
766 if (ret != 3)
767 return;
80fb8234 768 len = AV_RB16(buf + 1);
b7b8fc34
FB
769#ifdef DEBUG
770 printf("skipping RTP packet len=%d\n", len);
771#endif
772 /* skip payload */
773 while (len > 0) {
774 len1 = len;
775 if (len1 > sizeof(buf))
776 len1 = sizeof(buf);
2a42b5c3 777 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
778 if (ret != len1)
779 return;
780 len -= len1;
781 }
782}
1617ad97 783
115329f1
DB
784static void rtsp_send_cmd(AVFormatContext *s,
785 const char *cmd, RTSPHeader *reply,
1617ad97
FB
786 unsigned char **content_ptr)
787{
788 RTSPState *rt = s->priv_data;
789 char buf[4096], buf1[1024], *q;
790 unsigned char ch;
791 const char *p;
792 int content_length, line_count;
793 unsigned char *content = NULL;
794
795 memset(reply, 0, sizeof(RTSPHeader));
796
797 rt->seq++;
75e61b0e 798 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 799 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 800 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 801 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 802 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 803 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 804 }
75e61b0e 805 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
806#ifdef DEBUG
807 printf("Sending:\n%s--\n", buf);
808#endif
809 url_write(rt->rtsp_hd, buf, strlen(buf));
810
811 /* parse reply (XXX: use buffers) */
812 line_count = 0;
813 rt->last_reply[0] = '\0';
814 for(;;) {
815 q = buf;
816 for(;;) {
2a42b5c3 817 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
818 break;
819 if (ch == '\n')
820 break;
b7b8fc34
FB
821 if (ch == '$') {
822 /* XXX: only parse it if first char on line ? */
823 rtsp_skip_packet(s);
824 } else if (ch != '\r') {
1617ad97
FB
825 if ((q - buf) < sizeof(buf) - 1)
826 *q++ = ch;
827 }
828 }
829 *q = '\0';
830#ifdef DEBUG
831 printf("line='%s'\n", buf);
832#endif
833 /* test if last line */
834 if (buf[0] == '\0')
835 break;
836 p = buf;
837 if (line_count == 0) {
838 /* get reply code */
839 get_word(buf1, sizeof(buf1), &p);
840 get_word(buf1, sizeof(buf1), &p);
841 reply->status_code = atoi(buf1);
842 } else {
843 rtsp_parse_line(reply, p);
75e61b0e
MR
844 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
845 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
846 }
847 line_count++;
848 }
115329f1 849
1617ad97 850 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 851 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 852
1617ad97
FB
853 content_length = reply->content_length;
854 if (content_length > 0) {
855 /* leave some room for a trailing '\0' (useful for simple parsing) */
856 content = av_malloc(content_length + 1);
2a42b5c3 857 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
858 content[content_length] = '\0';
859 }
860 if (content_ptr)
861 *content_ptr = content;
e2e2e7dd
AB
862 else
863 av_free(content);
1617ad97
FB
864}
865
1617ad97 866
8b1ab7bf
FB
867/* close and free RTSP streams */
868static void rtsp_close_streams(RTSPState *rt)
869{
870 int i;
871 RTSPStream *rtsp_st;
872
873 for(i=0;i<rt->nb_rtsp_streams;i++) {
874 rtsp_st = rt->rtsp_streams[i];
875 if (rtsp_st) {
accc248f
RB
876 if (rtsp_st->tx_ctx) {
877 if (rt->transport == RTSP_TRANSPORT_RDT)
878 ff_rdt_parse_close(rtsp_st->tx_ctx);
879 else
5465b0d4 880 rtp_parse_close(rtsp_st->tx_ctx);
accc248f 881 }
8b1ab7bf
FB
882 if (rtsp_st->rtp_handle)
883 url_close(rtsp_st->rtp_handle);
4934884a
RM
884 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
885 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 886 }
8b1ab7bf
FB
887 }
888 av_free(rt->rtsp_streams);
889}
890
ee0cb67f
RB
891static int
892rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
893{
accc248f 894 RTSPState *rt = s->priv_data;
ee0cb67f
RB
895 AVStream *st = NULL;
896
a6789dca
RB
897 /* open the RTP context */
898 if (rtsp_st->stream_index >= 0)
899 st = s->streams[rtsp_st->stream_index];
900 if (!st)
901 s->ctx_flags |= AVFMTCTX_NOHEADER;
accc248f
RB
902
903 if (rt->transport == RTSP_TRANSPORT_RDT)
904 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st,
905 rtsp_st->dynamic_protocol_context,
906 rtsp_st->dynamic_handler);
907 else
5465b0d4 908 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
a6789dca 909
5465b0d4 910 if (!rtsp_st->tx_ctx) {
a6789dca 911 return AVERROR(ENOMEM);
accc248f 912 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
a6789dca 913 if(rtsp_st->dynamic_handler) {
5465b0d4 914 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
99a1d191
RB
915 rtsp_st->dynamic_protocol_context,
916 rtsp_st->dynamic_handler);
ee0cb67f 917 }
a6789dca 918 }
ee0cb67f
RB
919
920 return 0;
921}
922
53620bba
RB
923/**
924 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
925 */
926static int
e9dea59f 927make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 928 int lower_transport, const char *real_challenge)
1617ad97
FB
929{
930 RTSPState *rt = s->priv_data;
53620bba 931 int j, i, err;
1617ad97 932 RTSPStream *rtsp_st;
53620bba
RB
933 RTSPHeader reply1, *reply = &reply1;
934 char cmd[2048];
e9dea59f
RB
935 const char *trans_pref;
936
119b4668 937 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
938 trans_pref = "x-pn-tng";
939 else
940 trans_pref = "RTP/AVP";
115329f1 941
1617ad97
FB
942 /* for each stream, make the setup request */
943 /* XXX: we assume the same server is used for the control of each
944 RTSP stream */
d1ccf0e0
RD
945
946 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
947 char transport[2048];
948
8b1ab7bf 949 rtsp_st = rt->rtsp_streams[i];
1617ad97 950
1617ad97 951 /* RTP/UDP */
90abbdba 952 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 953 char buf[256];
85fb7b34
FB
954
955 /* first try in specified port range */
d1ccf0e0
RD
956 if (RTSP_RTP_PORT_MIN != 0) {
957 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 958 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 959 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 960 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 961 goto rtp_opened;
d1ccf0e0 962 }
85fb7b34 963 }
1617ad97 964 }
85fb7b34 965
d1ccf0e0
RD
966/* then try on any port
967** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
968** err = AVERROR_INVALIDDATA;
969** goto fail;
970** }
971*/
85fb7b34
FB
972
973 rtp_opened:
8b1ab7bf 974 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 975 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
976 "%s/UDP;", trans_pref);
977 if (rt->server_type != RTSP_SERVER_REAL)
978 av_strlcat(transport, "unicast;", sizeof(transport));
979 av_strlcatf(transport, sizeof(transport),
980 "client_port=%d", port);
119b4668 981 if (rt->transport == RTSP_TRANSPORT_RTP)
e9dea59f 982 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
983 }
984
985 /* RTP/TCP */
90abbdba 986 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
0ad306bc 987 snprintf(transport, sizeof(transport) - 1,
e9dea59f 988 "%s/TCP", trans_pref);
1617ad97
FB
989 }
990
90abbdba 991 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 992 snprintf(transport, sizeof(transport) - 1,
e9dea59f 993 "%s/UDP;multicast", trans_pref);
1617ad97 994 }
2e889ae4 995 if (rt->server_type == RTSP_SERVER_REAL)
e9dea59f 996 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 997 snprintf(cmd, sizeof(cmd),
b6892136
FB
998 "SETUP %s RTSP/1.0\r\n"
999 "Transport: %s\r\n",
1617ad97 1000 rtsp_st->control_url, transport);
2e889ae4 1001 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1002 char real_res[41], real_csum[9];
1003 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1004 real_challenge);
1005 av_strlcatf(cmd, sizeof(cmd),
1006 "If-Match: %s\r\n"
1007 "RealChallenge2: %s, sd=%s\r\n",
1008 rt->session_id, real_res, real_csum);
1009 }
1617ad97 1010 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1011 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1012 err = 1;
1013 goto fail;
7e6ca34f
RB
1014 } else if (reply->status_code != RTSP_STATUS_OK ||
1015 reply->nb_transports != 1) {
1617ad97
FB
1016 err = AVERROR_INVALIDDATA;
1017 goto fail;
1018 }
1019
1020 /* XXX: same protocol for all streams is required */
1021 if (i > 0) {
119b4668
RB
1022 if (reply->transports[0].lower_transport != rt->lower_transport ||
1023 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1024 err = AVERROR_INVALIDDATA;
1025 goto fail;
1026 }
1027 } else {
90abbdba 1028 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1029 rt->transport = reply->transports[0].transport;
1617ad97
FB
1030 }
1031
1032 /* close RTP connection if not choosen */
90abbdba
RB
1033 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1034 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1035 url_close(rtsp_st->rtp_handle);
1036 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1037 }
1038
90abbdba
RB
1039 switch(reply->transports[0].lower_transport) {
1040 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1041 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1042 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1043 break;
115329f1 1044
90abbdba 1045 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
1046 {
1047 char url[1024];
115329f1 1048
1617ad97 1049 /* XXX: also use address if specified */
115329f1 1050 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1051 host, reply->transports[0].server_port_min);
8b1ab7bf 1052 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1053 err = AVERROR_INVALIDDATA;
1054 goto fail;
1055 }
1056 }
1057 break;
90abbdba 1058 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1059 {
1060 char url[1024];
d02678ec 1061 struct in_addr in;
1617ad97 1062
d02678ec 1063 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1064 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1065 inet_ntoa(in),
1066 reply->transports[0].port_min,
1067 reply->transports[0].ttl);
dbf30963 1068 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1069 err = AVERROR_INVALIDDATA;
1070 goto fail;
1071 }
1072 }
1073 break;
1074 }
d1ccf0e0 1075
ee0cb67f 1076 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1077 goto fail;
1617ad97
FB
1078 }
1079
2e889ae4 1080 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1081 rt->need_subscription = 1;
1082
53620bba
RB
1083 return 0;
1084
1085fail:
8a8754d8
RB
1086 for (i=0; i<rt->nb_rtsp_streams; i++) {
1087 if (rt->rtsp_streams[i]->rtp_handle) {
1088 url_close(rt->rtsp_streams[i]->rtp_handle);
1089 rt->rtsp_streams[i]->rtp_handle = NULL;
1090 }
1091 }
53620bba
RB
1092 return err;
1093}
1094
1095static int rtsp_read_header(AVFormatContext *s,
1096 AVFormatParameters *ap)
1097{
1098 RTSPState *rt = s->priv_data;
1099 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1100 URLContext *rtsp_hd;
1101 int port, ret, err;
1102 RTSPHeader reply1, *reply = &reply1;
1103 unsigned char *content = NULL;
90abbdba 1104 int lower_transport_mask = 0;
1cf151e9 1105 char real_challenge[64];
53620bba
RB
1106
1107 /* extract hostname and port */
1108 url_split(NULL, 0, NULL, 0,
1109 host, sizeof(host), &port, path, sizeof(path), s->filename);
1110 if (port < 0)
1111 port = RTSP_DEFAULT_PORT;
1112
1113 /* search for options */
1114 option_list = strchr(path, '?');
1115 if (option_list) {
1116 /* remove the options from the path */
1117 *option_list++ = 0;
1118 while(option_list) {
1119 /* move the option pointer */
1120 option = option_list;
1121 option_list = strchr(option_list, '&');
1122 if (option_list)
1123 *(option_list++) = 0;
1124 /* handle the options */
1125 if (strcmp(option, "udp") == 0)
90abbdba 1126 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1127 else if (strcmp(option, "multicast") == 0)
90abbdba 1128 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1129 else if (strcmp(option, "tcp") == 0)
90abbdba 1130 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1131 }
1132 }
1133
90abbdba
RB
1134 if (!lower_transport_mask)
1135 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
53620bba
RB
1136
1137 /* open the tcp connexion */
1138 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1139 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1140 return AVERROR(EIO);
1141 rt->rtsp_hd = rtsp_hd;
1142 rt->seq = 0;
1143
1cf151e9
RB
1144 /* request options supported by the server; this also detects server type */
1145 for (rt->server_type = RTSP_SERVER_RTP;;) {
1146 snprintf(cmd, sizeof(cmd),
1147 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1148 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1149 av_strlcat(cmd,
1150 /**
1151 * The following entries are required for proper
1152 * streaming from a Realmedia server. They are
1153 * interdependent in some way although we currently
1154 * don't quite understand how. Values were copied
1155 * from mplayer SVN r23589.
1156 * @param CompanyID is a 16-byte ID in base64
1157 * @param ClientChallenge is a 16-byte ID in hex
1158 */
1159 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1160 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1161 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1162 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1163 sizeof(cmd));
1164 rtsp_send_cmd(s, cmd, reply, NULL);
1165 if (reply->status_code != RTSP_STATUS_OK) {
1166 err = AVERROR_INVALIDDATA;
1167 goto fail;
1168 }
1169
1170 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1171 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1172 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1173 continue;
2e889ae4 1174 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1175 strcpy(real_challenge, reply->real_challenge);
1176 }
1177 break;
1178 }
1179
53620bba
RB
1180 /* describe the stream */
1181 snprintf(cmd, sizeof(cmd),
1182 "DESCRIBE %s RTSP/1.0\r\n"
1183 "Accept: application/sdp\r\n",
1184 s->filename);
2e889ae4 1185 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1186 /**
1187 * The Require: attribute is needed for proper streaming from
1188 * Realmedia servers.
1189 */
1190 av_strlcat(cmd,
1191 "Require: com.real.retain-entity-for-setup\r\n",
1192 sizeof(cmd));
1193 }
53620bba
RB
1194 rtsp_send_cmd(s, cmd, reply, &content);
1195 if (!content) {
1196 err = AVERROR_INVALIDDATA;
1197 goto fail;
1198 }
1199 if (reply->status_code != RTSP_STATUS_OK) {
1200 err = AVERROR_INVALIDDATA;
1201 goto fail;
1202 }
1203
1204 /* now we got the SDP description, we parse it */
1205 ret = sdp_parse(s, (const char *)content);
1206 av_freep(&content);
1207 if (ret < 0) {
1208 err = AVERROR_INVALIDDATA;
1209 goto fail;
1210 }
1211
8a8754d8 1212 do {
90abbdba 1213 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1214
90abbdba 1215 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1216 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1217 real_challenge : NULL);
8a8754d8 1218 if (err < 0)
7e6ca34f 1219 goto fail;
90abbdba
RB
1220 lower_transport_mask &= ~(1 << lower_transport);
1221 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1222 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1223 goto fail;
1224 }
1225 } while (err);
53620bba 1226
ff762d6e
FB
1227 rt->state = RTSP_STATE_IDLE;
1228 rt->seek_timestamp = 0; /* default is to start stream at position
1229 zero */
c04c3282 1230 if (ap->initial_pause) {
ff762d6e
FB
1231 /* do not start immediately */
1232 } else {
1233 if (rtsp_read_play(s) < 0) {
1234 err = AVERROR_INVALIDDATA;
1617ad97
FB
1235 goto fail;
1236 }
1237 }
1617ad97
FB
1238 return 0;
1239 fail:
8b1ab7bf 1240 rtsp_close_streams(rt);
1617ad97
FB
1241 av_freep(&content);
1242 url_close(rt->rtsp_hd);
1243 return err;
1244}
1245
8b1ab7bf
FB
1246static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1247 uint8_t *buf, int buf_size)
1617ad97
FB
1248{
1249 RTSPState *rt = s->priv_data;
b6892136 1250 int id, len, i, ret;
1617ad97 1251 RTSPStream *rtsp_st;
1617ad97 1252
b6892136
FB
1253#ifdef DEBUG_RTP_TCP
1254 printf("tcp_read_packet:\n");
1255#endif
1617ad97
FB
1256 redo:
1257 for(;;) {
2a42b5c3 1258 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1259#ifdef DEBUG_RTP_TCP
1260 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1261#endif
1262 if (ret != 1)
8b1ab7bf 1263 return -1;
b6892136 1264 if (buf[0] == '$')
1617ad97
FB
1265 break;
1266 }
2a42b5c3 1267 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1268 if (ret != 3)
8b1ab7bf 1269 return -1;
b6892136 1270 id = buf[0];
80fb8234 1271 len = AV_RB16(buf + 1);
b6892136
FB
1272#ifdef DEBUG_RTP_TCP
1273 printf("id=%d len=%d\n", id, len);
1274#endif
8b1ab7bf 1275 if (len > buf_size || len < 12)
1617ad97
FB
1276 goto redo;
1277 /* get the data */
2a42b5c3 1278 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1279 if (ret != len)
8b1ab7bf 1280 return -1;
985b05d3
RB
1281 if (rt->transport == RTSP_TRANSPORT_RDT &&
1282 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL) < 0)
1283 return -1;
115329f1 1284
1617ad97 1285 /* find the matching stream */
8b1ab7bf
FB
1286 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1287 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1288 if (id >= rtsp_st->interleaved_min &&
1289 id <= rtsp_st->interleaved_max)
1617ad97
FB
1290 goto found;
1291 }
1292 goto redo;
1293 found:
8b1ab7bf
FB
1294 *prtsp_st = rtsp_st;
1295 return len;
1617ad97
FB
1296}
1297
115329f1 1298static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1299 uint8_t *buf, int buf_size)
1617ad97 1300{
8b1ab7bf 1301 RTSPState *rt = s->priv_data;
1617ad97
FB
1302 RTSPStream *rtsp_st;
1303 fd_set rfds;
1304 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1305 struct timeval tv;
1306
1307 for(;;) {
b7b8fc34 1308 if (url_interrupt_cb())
a960a1e0 1309 return AVERROR(EINTR);
1617ad97
FB
1310 FD_ZERO(&rfds);
1311 fd_max = -1;
8b1ab7bf
FB
1312 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1313 rtsp_st = rt->rtsp_streams[i];
1617ad97 1314 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1315 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1316 if (fd1 > fd_max)
1317 fd_max = fd1;
1318 FD_SET(fd1, &rfds);
1319 }
1617ad97 1320 tv.tv_sec = 0;
b7b8fc34 1321 tv.tv_usec = 100 * 1000;
1617ad97
FB
1322 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1323 if (n > 0) {
8b1ab7bf
FB
1324 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1325 rtsp_st = rt->rtsp_streams[i];
1326 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1327 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1328 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1329 if (ret > 0) {
1330 *prtsp_st = rtsp_st;
1617ad97
FB
1331 return ret;
1332 }
1333 }
1334 }
1335 }
1336 }
1337}
1338
1339static int rtsp_read_packet(AVFormatContext *s,
1340 AVPacket *pkt)
1341{
1342 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1343 RTSPStream *rtsp_st;
1344 int ret, len;
1345 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1346
2e889ae4 1347 if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1256d16b
RB
1348 int i;
1349 RTSPHeader reply1, *reply = &reply1;
1350 char cmd[1024];
1351
1352 snprintf(cmd, sizeof(cmd),
1353 "SET_PARAMETER %s RTSP/1.0\r\n"
1354 "Subscribe: ",
1355 s->filename);
1356 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1357 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
ab63fb03 1358 ff_rdt_subscribe_rule(cmd, sizeof(cmd), i, 0);
119b4668 1359 if (rt->transport == RTSP_TRANSPORT_RDT)
f5f1e97f 1360 ff_rdt_subscribe_rule2(
5465b0d4 1361 rt->rtsp_streams[i]->tx_ctx,
f5f1e97f 1362 cmd, sizeof(cmd), i, 0);
1256d16b
RB
1363 }
1364 av_strlcat(cmd, "\r\n", sizeof(cmd));
1365 rtsp_send_cmd(s, cmd, reply, NULL);
1366 if (reply->status_code != RTSP_STATUS_OK)
1367 return AVERROR_INVALIDDATA;
1368 rt->need_subscription = 0;
1369
1370 if (rt->state == RTSP_STATE_PLAYING)
1371 rtsp_read_play (s);
1372 }
1373
8b1ab7bf 1374 /* get next frames from the same RTP packet */
5465b0d4 1375 if (rt->cur_tx) {
119b4668 1376 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1377 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
4fce284c 1378 else
5465b0d4 1379 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
8b1ab7bf 1380 if (ret == 0) {
5465b0d4 1381 rt->cur_tx = NULL;
8b1ab7bf
FB
1382 return 0;
1383 } else if (ret == 1) {
1384 return 0;
1385 } else {
5465b0d4 1386 rt->cur_tx = NULL;
8b1ab7bf
FB
1387 }
1388 }
1617ad97 1389
8b1ab7bf
FB
1390 /* read next RTP packet */
1391 redo:
90abbdba 1392 switch(rt->lower_transport) {
1617ad97 1393 default:
90abbdba 1394 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1395 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1396 break;
90abbdba
RB
1397 case RTSP_LOWER_TRANSPORT_UDP:
1398 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1399 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
5465b0d4
RB
1400 if (len >=0 && rtsp_st->tx_ctx)
1401 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1617ad97
FB
1402 break;
1403 }
8b1ab7bf 1404 if (len < 0)
489b0d4d 1405 return len;
119b4668 1406 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1407 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
4fce284c 1408 else
5465b0d4 1409 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
8b1ab7bf
FB
1410 if (ret < 0)
1411 goto redo;
1412 if (ret == 1) {
1413 /* more packets may follow, so we save the RTP context */
5465b0d4 1414 rt->cur_tx = rtsp_st->tx_ctx;
8b1ab7bf
FB
1415 }
1416 return 0;
1617ad97
FB
1417}
1418
ff762d6e 1419static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1420{
ff762d6e 1421 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1422 RTSPHeader reply1, *reply = &reply1;
1423 char cmd[1024];
1424
bc874dae 1425 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1426
2e889ae4 1427 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1428 if (rt->state == RTSP_STATE_PAUSED) {
1429 snprintf(cmd, sizeof(cmd),
1430 "PLAY %s RTSP/1.0\r\n",
1431 s->filename);
1432 } else {
1433 snprintf(cmd, sizeof(cmd),
1434 "PLAY %s RTSP/1.0\r\n"
1435 "Range: npt=%0.3f-\r\n",
1436 s->filename,
1437 (double)rt->seek_timestamp / AV_TIME_BASE);
1438 }
1439 rtsp_send_cmd(s, cmd, reply, NULL);
1440 if (reply->status_code != RTSP_STATUS_OK) {
1441 return -1;
1442 }
1256d16b 1443 }
5f86057f
RB
1444 rt->state = RTSP_STATE_PLAYING;
1445 return 0;
b7b8fc34
FB
1446}
1447
ff762d6e
FB
1448/* pause the stream */
1449static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1450{
ff762d6e 1451 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1452 RTSPHeader reply1, *reply = &reply1;
1453 char cmd[1024];
1454
b7b8fc34 1455 rt = s->priv_data;
115329f1 1456
ff762d6e
FB
1457 if (rt->state != RTSP_STATE_PLAYING)
1458 return 0;
2e889ae4 1459 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1460 snprintf(cmd, sizeof(cmd),
1461 "PAUSE %s RTSP/1.0\r\n",
1462 s->filename);
1463 rtsp_send_cmd(s, cmd, reply, NULL);
1464 if (reply->status_code != RTSP_STATUS_OK) {
1465 return -1;
1466 }
1256d16b 1467 }
5f86057f
RB
1468 rt->state = RTSP_STATE_PAUSED;
1469 return 0;
b7b8fc34
FB
1470}
1471
115329f1 1472static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1473 int64_t timestamp, int flags)
ff762d6e
FB
1474{
1475 RTSPState *rt = s->priv_data;
115329f1 1476
50755217 1477 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1478 switch(rt->state) {
1479 default:
1480 case RTSP_STATE_IDLE:
1481 break;
1482 case RTSP_STATE_PLAYING:
1483 if (rtsp_read_play(s) != 0)
1484 return -1;
1485 break;
1486 case RTSP_STATE_PAUSED:
1487 rt->state = RTSP_STATE_IDLE;
1488 break;
1489 }
1490 return 0;
1491}
1492
1617ad97
FB
1493static int rtsp_read_close(AVFormatContext *s)
1494{
1495 RTSPState *rt = s->priv_data;
1617ad97 1496 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1497 char cmd[1024];
1498
b6892136 1499#if 0
1617ad97 1500 /* NOTE: it is valid to flush the buffer here */
90abbdba 1501 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1502 url_fclose(&rt->rtsp_gb);
1503 }
b6892136 1504#endif
115329f1 1505 snprintf(cmd, sizeof(cmd),
b6892136 1506 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1507 s->filename);
1508 rtsp_send_cmd(s, cmd, reply, NULL);
1509
8b1ab7bf 1510 rtsp_close_streams(rt);
1617ad97
FB
1511 url_close(rt->rtsp_hd);
1512 return 0;
1513}
1514
96862926 1515#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1516AVInputFormat rtsp_demuxer = {
1617ad97 1517 "rtsp",
bde15e74 1518 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1519 sizeof(RTSPState),
1520 rtsp_probe,
1521 rtsp_read_header,
1522 rtsp_read_packet,
1523 rtsp_read_close,
ff762d6e 1524 rtsp_read_seek,
bb76a117 1525 .flags = AVFMT_NOFILE,
ff762d6e
FB
1526 .read_play = rtsp_read_play,
1527 .read_pause = rtsp_read_pause,
1617ad97 1528};
96862926 1529#endif
1617ad97 1530
cb1fdc61 1531static int sdp_probe(AVProbeData *p1)
93ced3e8 1532{
0e1ceacd 1533 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1534
1535 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1536 while (p < p_end && *p != '\0') {
f7d78f36 1537 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1538 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1539
1540 while(p < p_end - 1 && *p != '\n') p++;
1541 if (++p >= p_end)
cb1fdc61 1542 break;
cb1fdc61
FB
1543 if (*p == '\r')
1544 p++;
1545 }
93ced3e8
FB
1546 return 0;
1547}
1548
1549#define SDP_MAX_SIZE 8192
1550
1551static int sdp_read_header(AVFormatContext *s,
1552 AVFormatParameters *ap)
1553{
8b1ab7bf 1554 RTSPState *rt = s->priv_data;
93ced3e8
FB
1555 RTSPStream *rtsp_st;
1556 int size, i, err;
1557 char *content;
1558 char url[1024];
1559
1560 /* read the whole sdp file */
1561 /* XXX: better loading */
1562 content = av_malloc(SDP_MAX_SIZE);
899681cd 1563 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1564 if (size <= 0) {
1565 av_free(content);
1566 return AVERROR_INVALIDDATA;
1567 }
1568 content[size] ='\0';
1569
1570 sdp_parse(s, content);
1571 av_free(content);
1572
1573 /* open each RTP stream */
8b1ab7bf
FB
1574 for(i=0;i<rt->nb_rtsp_streams;i++) {
1575 rtsp_st = rt->rtsp_streams[i];
115329f1 1576
d2bf42be 1577 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1578 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1579 rtsp_st->sdp_port,
d2bf42be 1580 rtsp_st->sdp_port,
93ced3e8 1581 rtsp_st->sdp_ttl);
dbf30963 1582 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1583 err = AVERROR_INVALIDDATA;
1584 goto fail;
1585 }
ee0cb67f 1586 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1587 goto fail;
93ced3e8
FB
1588 }
1589 return 0;
1590 fail:
8b1ab7bf 1591 rtsp_close_streams(rt);
93ced3e8
FB
1592 return err;
1593}
1594
1595static int sdp_read_packet(AVFormatContext *s,
1596 AVPacket *pkt)
1597{
8b1ab7bf 1598 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1599}
1600
1601static int sdp_read_close(AVFormatContext *s)
1602{
8b1ab7bf
FB
1603 RTSPState *rt = s->priv_data;
1604 rtsp_close_streams(rt);
93ced3e8
FB
1605 return 0;
1606}
1607
ff70e601
MR
1608#ifdef CONFIG_SDP_DEMUXER
1609AVInputFormat sdp_demuxer = {
93ced3e8 1610 "sdp",
bde15e74 1611 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1612 sizeof(RTSPState),
1613 sdp_probe,
1614 sdp_read_header,
1615 sdp_read_packet,
1616 sdp_read_close,
1617};
ff70e601 1618#endif
93ced3e8 1619
e7047005 1620#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1621/* dummy redirector format (used directly in av_open_input_file now) */
1622static int redir_probe(AVProbeData *pd)
1623{
1624 const char *p;
1625 p = pd->buf;
1626 while (redir_isspace(*p))
1627 p++;
f7d78f36
MR
1628 if (av_strstart(p, "http://", NULL) ||
1629 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1630 return AVPROBE_SCORE_MAX;
1631 return 0;
1632}
1633
e8acf0ed 1634static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1635{
1636 char buf[4096], *q;
1637 int c;
1638 AVFormatContext *ic = NULL;
e8acf0ed 1639 ByteIOContext *f = s->pb;
1617ad97
FB
1640
1641 /* parse each URL and try to open it */
1642 c = url_fgetc(f);
1643 while (c != URL_EOF) {
1644 /* skip spaces */
1645 for(;;) {
1646 if (!redir_isspace(c))
1647 break;
1648 c = url_fgetc(f);
1649 }
1650 if (c == URL_EOF)
1651 break;
1652 /* record url */
1653 q = buf;
1654 for(;;) {
1655 if (c == URL_EOF || redir_isspace(c))
1656 break;
1657 if ((q - buf) < sizeof(buf) - 1)
1658 *q++ = c;
1659 c = url_fgetc(f);
1660 }
1661 *q = '\0';
1662 //printf("URL='%s'\n", buf);
1663 /* try to open the media file */
1664 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1665 break;
1666 }
1617ad97 1667 if (!ic)
6f3e0b21 1668 return AVERROR(EIO);
e8acf0ed
LA
1669
1670 *s = *ic;
1671 url_fclose(f);
1672
1673 return 0;
1617ad97
FB
1674}
1675
d2a067d1 1676AVInputFormat redir_demuxer = {
1617ad97 1677 "redir",
bde15e74 1678 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1679 0,
1680 redir_probe,
e8acf0ed 1681 redir_read_header,
1617ad97
FB
1682 NULL,
1683 NULL,
1684};
e7047005 1685#endif