Recognize the "application" data type, which is required for WMS/UDP
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
406792e7 3 * Copyright (c) 2002 Fabrice Bellard
1617ad97 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,
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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"
6a5d31ac 26#include "libavutil/intreadwrite.h"
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27#include "avformat.h"
28
db0ed93e 29#include <sys/time.h>
b250f9c6 30#if HAVE_SYS_SELECT_H
933bd8e2 31#include <sys/select.h>
6ad1c9c9 32#endif
ea452b54 33#include <strings.h>
42572ef5 34#include "network.h"
c971ff19 35#include "rtsp.h"
1617ad97 36
302879cb 37#include "rtpdec.h"
e9dea59f 38#include "rdt.h"
4934884a 39
1617ad97 40//#define DEBUG
b6892136 41//#define DEBUG_RTP_TCP
1617ad97 42
ff762d6e
FB
43static int rtsp_read_play(AVFormatContext *s);
44
1617ad97
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45/* XXX: currently, the only way to change the protocols consists in
46 changing this variable */
1617ad97 47
c482500f 48#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 49int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 50#endif
85fb7b34 51
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52static int rtsp_probe(AVProbeData *p)
53{
f7d78f36 54 if (av_strstart(p->filename, "rtsp:", NULL))
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55 return AVPROBE_SCORE_MAX;
56 return 0;
57}
58
59static int redir_isspace(int c)
60{
ccd425e7 61 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
1617ad97
FB
62}
63
64static void skip_spaces(const char **pp)
65{
66 const char *p;
67 p = *pp;
68 while (redir_isspace(*p))
69 p++;
70 *pp = p;
71}
72
115329f1 73static void get_word_sep(char *buf, int buf_size, const char *sep,
1617ad97
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74 const char **pp)
75{
76 const char *p;
77 char *q;
78
79 p = *pp;
d1ccf0e0
RD
80 if (*p == '/')
81 p++;
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82 skip_spaces(&p);
83 q = buf;
84 while (!strchr(sep, *p) && *p != '\0') {
85 if ((q - buf) < buf_size - 1)
86 *q++ = *p;
87 p++;
88 }
89 if (buf_size > 0)
90 *q = '\0';
91 *pp = p;
92}
93
94static void get_word(char *buf, int buf_size, const char **pp)
95{
96 const char *p;
97 char *q;
98
99 p = *pp;
100 skip_spaces(&p);
101 q = buf;
102 while (!redir_isspace(*p) && *p != '\0') {
103 if ((q - buf) < buf_size - 1)
104 *q++ = *p;
105 p++;
106 }
107 if (buf_size > 0)
108 *q = '\0';
109 *pp = p;
110}
111
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112/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
113 params>] */
4934884a 114static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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115{
116 char buf[256];
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RD
117 int i;
118 AVCodec *c;
7b49ce2e 119 const char *c_name;
93ced3e8 120
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RD
121 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
122 see if we can handle this kind of payload */
93ced3e8 123 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 124 if (payload_type >= RTP_PT_PRIVATE) {
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RM
125 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
126 while(handler) {
127 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
128 codec->codec_id = handler->codec_id;
129 rtsp_st->dynamic_handler= handler;
130 if(handler->open) {
131 rtsp_st->dynamic_protocol_context= handler->open();
132 }
d1ccf0e0
RD
133 break;
134 }
4934884a
RM
135 handler= handler->next;
136 }
93ced3e8 137 } else {
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RD
138 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
139 /* search into AVRtpPayloadTypes[] */
7ed19d7f 140 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
141 }
142
143 c = avcodec_find_decoder(codec->codec_id);
144 if (c && c->name)
7b49ce2e 145 c_name = c->name;
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RD
146 else
147 c_name = (char *)NULL;
148
149 if (c_name) {
150 get_word_sep(buf, sizeof(buf), "/", &p);
151 i = atoi(buf);
152 switch (codec->codec_type) {
153 case CODEC_TYPE_AUDIO:
154 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
155 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
156 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
157 if (i > 0) {
158 codec->sample_rate = i;
159 get_word_sep(buf, sizeof(buf), "/", &p);
160 i = atoi(buf);
161 if (i > 0)
162 codec->channels = i;
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RM
163 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
164 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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RD
165 }
166 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
167 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
168 break;
169 case CODEC_TYPE_VIDEO:
170 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
171 break;
172 default:
173 break;
174 }
175 return 0;
93ced3e8 176 }
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RD
177
178 return -1;
93ced3e8
FB
179}
180
181/* return the length and optionnaly the data */
182static int hex_to_data(uint8_t *data, const char *p)
183{
184 int c, len, v;
185
186 len = 0;
187 v = 1;
188 for(;;) {
189 skip_spaces(&p);
190 if (p == '\0')
191 break;
192 c = toupper((unsigned char)*p++);
193 if (c >= '0' && c <= '9')
194 c = c - '0';
195 else if (c >= 'A' && c <= 'F')
196 c = c - 'A' + 10;
197 else
198 break;
199 v = (v << 4) | c;
200 if (v & 0x100) {
201 if (data)
202 data[len] = v;
203 len++;
204 v = 1;
205 }
206 }
207 return len;
208}
209
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RD
210static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
211{
212 switch (codec->codec_id) {
213 case CODEC_ID_MPEG4:
cbee7a69 214 case CODEC_ID_AAC:
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RD
215 if (!strcmp(attr, "config")) {
216 /* decode the hexa encoded parameter */
217 int len = hex_to_data(NULL, value);
218 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
219 if (!codec->extradata)
220 return;
221 codec->extradata_size = len;
222 hex_to_data(codec->extradata, value);
223 }
224 break;
225 default:
226 break;
227 }
228 return;
229}
230
644e7acb 231typedef struct {
7b49ce2e 232 const char *str;
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RD
233 uint16_t type;
234 uint32_t offset;
644e7acb 235} AttrNameMap;
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236
237/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
238#define ATTR_NAME_TYPE_INT 0
239#define ATTR_NAME_TYPE_STR 1
644e7acb 240static const AttrNameMap attr_names[]=
d1ccf0e0 241{
be73a544
LA
242 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
243 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
244 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
245 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
246 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
247 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
d1ccf0e0
RD
248 {NULL, -1, -1},
249};
250
d0deedcb
RM
251/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
252* because it is used in rtp_h264.c, which is forthcoming.
253*/
254int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
255{
256 skip_spaces(p);
257 if(**p)
258 {
259 get_word_sep(attr, attr_size, "=", p);
260 if (**p == '=')
261 (*p)++;
262 get_word_sep(value, value_size, ";", p);
263 if (**p == ';')
264 (*p)++;
265 return 1;
266 }
267 return 0;
268}
269
d1ccf0e0
RD
270/* parse a SDP line and save stream attributes */
271static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
272{
273 char attr[256];
274 char value[4096];
d1ccf0e0
RD
275 int i;
276
277 RTSPStream *rtsp_st = st->priv_data;
01f4895c 278 AVCodecContext *codec = st->codec;
be73a544 279 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
280
281 /* loop on each attribute */
1ad20f96
RM
282 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
283 {
bb270c08 284 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
285 sdp_parse_fmtp_config(codec, attr, value);
286 /* Looking for a known attribute */
287 for (i = 0; attr_names[i].str; ++i) {
288 if (!strcasecmp(attr, attr_names[i].str)) {
289 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
290 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
291 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
292 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 293 }
93ced3e8 294 }
93ced3e8
FB
295 }
296}
297
31693e00
RM
298/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
299 * and end time.
300 * Used for seeking in the rtp stream.
301 */
302static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
303{
304 char buf[256];
305
306 skip_spaces(&p);
f7d78f36 307 if (!av_stristart(p, "npt=", &p))
31693e00
RM
308 return;
309
310 *start = AV_NOPTS_VALUE;
311 *end = AV_NOPTS_VALUE;
312
313 get_word_sep(buf, sizeof(buf), "-", &p);
314 *start = parse_date(buf, 1);
315 if (*p == '-') {
316 p++;
317 get_word_sep(buf, sizeof(buf), "-", &p);
318 *end = parse_date(buf, 1);
319 }
320// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
321// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
322}
323
93ced3e8
FB
324typedef struct SDPParseState {
325 /* SDP only */
326 struct in_addr default_ip;
327 int default_ttl;
cb760a47 328 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
329} SDPParseState;
330
331static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
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332 int letter, const char *buf)
333{
8b1ab7bf 334 RTSPState *rt = s->priv_data;
1617ad97
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335 char buf1[64], st_type[64];
336 const char *p;
fb65d2ca
DP
337 enum CodecType codec_type;
338 int payload_type, i;
1617ad97
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339 AVStream *st;
340 RTSPStream *rtsp_st;
93ced3e8
FB
341 struct in_addr sdp_ip;
342 int ttl;
343
1617ad97
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344#ifdef DEBUG
345 printf("sdp: %c='%s'\n", letter, buf);
346#endif
347
348 p = buf;
cb760a47
RB
349 if (s1->skip_media && letter != 'm')
350 return;
1617ad97 351 switch(letter) {
93ced3e8
FB
352 case 'c':
353 get_word(buf1, sizeof(buf1), &p);
354 if (strcmp(buf1, "IN") != 0)
355 return;
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IP4") != 0)
358 return;
359 get_word_sep(buf1, sizeof(buf1), "/", &p);
360 if (inet_aton(buf1, &sdp_ip) == 0)
361 return;
362 ttl = 16;
363 if (*p == '/') {
364 p++;
365 get_word_sep(buf1, sizeof(buf1), "/", &p);
366 ttl = atoi(buf1);
367 }
368 if (s->nb_streams == 0) {
369 s1->default_ip = sdp_ip;
370 s1->default_ttl = ttl;
371 } else {
372 st = s->streams[s->nb_streams - 1];
373 rtsp_st = st->priv_data;
374 rtsp_st->sdp_ip = sdp_ip;
375 rtsp_st->sdp_ttl = ttl;
376 }
377 break;
1617ad97 378 case 's':
da61e413 379 av_metadata_set(&s->metadata, "title", p);
1617ad97
FB
380 break;
381 case 'i':
382 if (s->nb_streams == 0) {
da61e413 383 av_metadata_set(&s->metadata, "comment", p);
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FB
384 break;
385 }
386 break;
387 case 'm':
388 /* new stream */
cb760a47 389 s1->skip_media = 0;
1617ad97
FB
390 get_word(st_type, sizeof(st_type), &p);
391 if (!strcmp(st_type, "audio")) {
392 codec_type = CODEC_TYPE_AUDIO;
393 } else if (!strcmp(st_type, "video")) {
394 codec_type = CODEC_TYPE_VIDEO;
090438cc
RB
395 } else if (!strcmp(st_type, "application")) {
396 codec_type = CODEC_TYPE_DATA;
1617ad97 397 } else {
cb760a47 398 s1->skip_media = 1;
1617ad97
FB
399 return;
400 }
1617ad97
FB
401 rtsp_st = av_mallocz(sizeof(RTSPStream));
402 if (!rtsp_st)
403 return;
8b1ab7bf
FB
404 rtsp_st->stream_index = -1;
405 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
406
407 rtsp_st->sdp_ip = s1->default_ip;
408 rtsp_st->sdp_ttl = s1->default_ttl;
409
93ced3e8
FB
410 get_word(buf1, sizeof(buf1), &p); /* port */
411 rtsp_st->sdp_port = atoi(buf1);
412
413 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 414
93ced3e8
FB
415 /* XXX: handle list of formats */
416 get_word(buf1, sizeof(buf1), &p); /* format list */
417 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 418
7ed19d7f 419 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
420 /* no corresponding stream */
421 } else {
422 st = av_new_stream(s, 0);
423 if (!st)
424 return;
425 st->priv_data = rtsp_st;
426 rtsp_st->stream_index = st->index;
01f4895c 427 st->codec->codec_type = codec_type;
d1ccf0e0 428 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 429 /* if standard payload type, we can find the codec right now */
bf6d9818 430 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
431 }
432 }
1617ad97 433 /* put a default control url */
75e61b0e 434 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1617ad97
FB
435 break;
436 case 'a':
f7d78f36 437 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
1617ad97
FB
438 char proto[32];
439 /* get the control url */
440 st = s->streams[s->nb_streams - 1];
441 rtsp_st = st->priv_data;
115329f1 442
1617ad97 443 /* XXX: may need to add full url resolution */
6ba5cbc6 444 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
445 if (proto[0] == '\0') {
446 /* relative control URL */
75e61b0e
MR
447 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
448 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 449 } else {
75e61b0e 450 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 451 }
83d14c85 452 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 453 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 454 get_word(buf1, sizeof(buf1), &p);
93ced3e8 455 payload_type = atoi(buf1);
83d14c85 456 st = s->streams[s->nb_streams - 1];
ff16f551
RB
457 rtsp_st = st->priv_data;
458 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
f7d78f36 459 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 460 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 461 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
462 payload_type = atoi(buf1);
463 for(i = 0; i < s->nb_streams;i++) {
464 st = s->streams[i];
465 rtsp_st = st->priv_data;
466 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 467 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 468 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
4934884a
RM
469 sdp_parse_fmtp(st, p);
470 }
471 } else {
ed787542 472 sdp_parse_fmtp(st, p);
4934884a 473 }
93ced3e8
FB
474 }
475 }
f7d78f36 476 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
477 // let dynamic protocol handlers have a stab at the line.
478 get_word(buf1, sizeof(buf1), &p);
479 payload_type = atoi(buf1);
480 for(i = 0; i < s->nb_streams;i++) {
481 st = s->streams[i];
482 rtsp_st = st->priv_data;
483 if (rtsp_st->sdp_payload_type == payload_type) {
484 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 485 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
d0deedcb
RM
486 }
487 }
488 }
f7d78f36 489 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
490 int64_t start, end;
491
492 // this is so that seeking on a streamed file can work.
493 rtsp_parse_range_npt(p, &start, &end);
494 s->start_time= start;
495 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
119b4668
RB
496 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
497 if (atoi(p) == 1)
498 rt->transport = RTSP_TRANSPORT_RDT;
8646b907 499 } else if (s->nb_streams > 0) {
3ca45429
RB
500 if (rt->server_type == RTSP_SERVER_REAL)
501 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
502
8646b907
RB
503 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
504 if (rtsp_st->dynamic_handler &&
505 rtsp_st->dynamic_handler->parse_sdp_a_line)
7b2a0708 506 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
8646b907 507 rtsp_st->dynamic_protocol_context, buf);
1617ad97
FB
508 }
509 break;
510 }
511}
512
5c91a675 513static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
514{
515 const char *p;
516 int letter;
9211bcdd
RB
517 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
518 * contain long SDP lines containing complete ASF Headers (several
519 * kB) or arrays of MDPR (RM stream descriptor) headers plus
520 * "rulebooks" describing their properties. Therefore, the SDP line
521 * buffer is large. */
e322d3f5 522 char buf[8192], *q;
93ced3e8 523 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 524
93ced3e8 525 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
526 p = content;
527 for(;;) {
528 skip_spaces(&p);
529 letter = *p;
530 if (letter == '\0')
531 break;
532 p++;
533 if (*p != '=')
534 goto next_line;
535 p++;
536 /* get the content */
537 q = buf;
b6892136 538 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
539 if ((q - buf) < sizeof(buf) - 1)
540 *q++ = *p;
541 p++;
542 }
543 *q = '\0';
93ced3e8 544 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
545 next_line:
546 while (*p != '\n' && *p != '\0')
547 p++;
548 if (*p == '\n')
549 p++;
550 }
551 return 0;
552}
553
554static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
555{
556 const char *p;
557 int v;
558
559 p = *pp;
560 skip_spaces(&p);
561 v = strtol(p, (char **)&p, 10);
562 if (*p == '-') {
563 p++;
564 *min_ptr = v;
565 v = strtol(p, (char **)&p, 10);
566 *max_ptr = v;
567 } else {
568 *min_ptr = v;
569 *max_ptr = v;
570 }
571 *pp = p;
572}
573
574/* XXX: only one transport specification is parsed */
a9e534d5 575static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
576{
577 char transport_protocol[16];
578 char profile[16];
579 char lower_transport[16];
580 char parameter[16];
581 RTSPTransportField *th;
582 char buf[256];
115329f1 583
1617ad97 584 reply->nb_transports = 0;
115329f1 585
1617ad97
FB
586 for(;;) {
587 skip_spaces(&p);
588 if (*p == '\0')
589 break;
590
591 th = &reply->transports[reply->nb_transports];
592
115329f1 593 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
594 "/", &p);
595 if (*p == '/')
596 p++;
e1502118 597 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
598 get_word_sep(profile, sizeof(profile), "/;,", &p);
599 lower_transport[0] = '\0';
600 /* rtp/avp/<protocol> */
601 if (*p == '/') {
602 p++;
603 get_word_sep(lower_transport, sizeof(lower_transport),
604 ";,", &p);
119b4668
RB
605 }
606 th->transport = RTSP_TRANSPORT_RTP;
607 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
608 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 609 /* x-pn-tng/<protocol> */
e1502118
LB
610 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
611 profile[0] = '\0';
119b4668 612 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 613 }
b6892136 614 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 615 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 616 else
90abbdba 617 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 618
1617ad97
FB
619 if (*p == ';')
620 p++;
621 /* get each parameter */
622 while (*p != '\0' && *p != ',') {
623 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
624 if (!strcmp(parameter, "port")) {
625 if (*p == '=') {
626 p++;
627 rtsp_parse_range(&th->port_min, &th->port_max, &p);
628 }
629 } else if (!strcmp(parameter, "client_port")) {
630 if (*p == '=') {
631 p++;
115329f1 632 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
633 &th->client_port_max, &p);
634 }
635 } else if (!strcmp(parameter, "server_port")) {
636 if (*p == '=') {
637 p++;
115329f1 638 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
639 &th->server_port_max, &p);
640 }
641 } else if (!strcmp(parameter, "interleaved")) {
642 if (*p == '=') {
643 p++;
115329f1 644 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
645 &th->interleaved_max, &p);
646 }
647 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
648 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
649 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
650 } else if (!strcmp(parameter, "ttl")) {
651 if (*p == '=') {
652 p++;
653 th->ttl = strtol(p, (char **)&p, 10);
654 }
655 } else if (!strcmp(parameter, "destination")) {
656 struct in_addr ipaddr;
657
658 if (*p == '=') {
659 p++;
660 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 661 if (inet_aton(buf, &ipaddr))
1617ad97
FB
662 th->destination = ntohl(ipaddr.s_addr);
663 }
664 }
665 while (*p != ';' && *p != '\0' && *p != ',')
666 p++;
667 if (*p == ';')
668 p++;
669 }
670 if (*p == ',')
671 p++;
672
673 reply->nb_transports++;
674 }
675}
676
a9e534d5 677void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
678{
679 const char *p;
680
681 /* NOTE: we do case independent match for broken servers */
682 p = buf;
f7d78f36 683 if (av_stristart(p, "Session:", &p)) {
1617ad97 684 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 685 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 686 reply->content_length = strtol(p, NULL, 10);
f7d78f36 687 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 688 rtsp_parse_transport(reply, p);
f7d78f36 689 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 690 reply->seq = strtol(p, NULL, 10);
f7d78f36 691 } else if (av_stristart(p, "Range:", &p)) {
31693e00 692 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
693 } else if (av_stristart(p, "RealChallenge1:", &p)) {
694 skip_spaces(&p);
695 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
696 } else if (av_stristart(p, "Server:", &p)) {
697 skip_spaces(&p);
698 av_strlcpy(reply->server, p, sizeof(reply->server));
1617ad97
FB
699 }
700}
701
2a42b5c3
LS
702static int url_readbuf(URLContext *h, unsigned char *buf, int size)
703{
704 int ret, len;
705
706 len = 0;
707 while (len < size) {
708 ret = url_read(h, buf+len, size-len);
709 if (ret < 1)
710 return ret;
711 len += ret;
712 }
713 return len;
714}
715
b7b8fc34
FB
716/* skip a RTP/TCP interleaved packet */
717static void rtsp_skip_packet(AVFormatContext *s)
718{
719 RTSPState *rt = s->priv_data;
720 int ret, len, len1;
721 uint8_t buf[1024];
722
2a42b5c3 723 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
724 if (ret != 3)
725 return;
80fb8234 726 len = AV_RB16(buf + 1);
b7b8fc34
FB
727#ifdef DEBUG
728 printf("skipping RTP packet len=%d\n", len);
729#endif
730 /* skip payload */
731 while (len > 0) {
732 len1 = len;
733 if (len1 > sizeof(buf))
734 len1 = sizeof(buf);
2a42b5c3 735 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
736 if (ret != len1)
737 return;
738 len -= len1;
739 }
740}
1617ad97 741
115329f1 742static void rtsp_send_cmd(AVFormatContext *s,
a9e534d5 743 const char *cmd, RTSPMessageHeader *reply,
1617ad97
FB
744 unsigned char **content_ptr)
745{
746 RTSPState *rt = s->priv_data;
747 char buf[4096], buf1[1024], *q;
748 unsigned char ch;
749 const char *p;
750 int content_length, line_count;
751 unsigned char *content = NULL;
752
d541a7d2 753 memset(reply, 0, sizeof(*reply));
1617ad97
FB
754
755 rt->seq++;
75e61b0e 756 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 757 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 758 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 759 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 760 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 761 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 762 }
75e61b0e 763 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
764#ifdef DEBUG
765 printf("Sending:\n%s--\n", buf);
766#endif
767 url_write(rt->rtsp_hd, buf, strlen(buf));
768
769 /* parse reply (XXX: use buffers) */
770 line_count = 0;
771 rt->last_reply[0] = '\0';
772 for(;;) {
773 q = buf;
774 for(;;) {
2a42b5c3 775 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
776 break;
777 if (ch == '\n')
778 break;
b7b8fc34
FB
779 if (ch == '$') {
780 /* XXX: only parse it if first char on line ? */
781 rtsp_skip_packet(s);
782 } else if (ch != '\r') {
1617ad97
FB
783 if ((q - buf) < sizeof(buf) - 1)
784 *q++ = ch;
785 }
786 }
787 *q = '\0';
788#ifdef DEBUG
789 printf("line='%s'\n", buf);
790#endif
791 /* test if last line */
792 if (buf[0] == '\0')
793 break;
794 p = buf;
795 if (line_count == 0) {
796 /* get reply code */
797 get_word(buf1, sizeof(buf1), &p);
798 get_word(buf1, sizeof(buf1), &p);
799 reply->status_code = atoi(buf1);
800 } else {
801 rtsp_parse_line(reply, p);
75e61b0e
MR
802 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
803 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
804 }
805 line_count++;
806 }
115329f1 807
1617ad97 808 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 809 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 810
1617ad97
FB
811 content_length = reply->content_length;
812 if (content_length > 0) {
813 /* leave some room for a trailing '\0' (useful for simple parsing) */
814 content = av_malloc(content_length + 1);
2a42b5c3 815 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
816 content[content_length] = '\0';
817 }
818 if (content_ptr)
819 *content_ptr = content;
e2e2e7dd
AB
820 else
821 av_free(content);
1617ad97
FB
822}
823
1617ad97 824
8b1ab7bf
FB
825/* close and free RTSP streams */
826static void rtsp_close_streams(RTSPState *rt)
827{
828 int i;
829 RTSPStream *rtsp_st;
830
831 for(i=0;i<rt->nb_rtsp_streams;i++) {
832 rtsp_st = rt->rtsp_streams[i];
833 if (rtsp_st) {
0a861b6f 834 if (rtsp_st->transport_priv) {
accc248f 835 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 836 ff_rdt_parse_close(rtsp_st->transport_priv);
accc248f 837 else
0a861b6f 838 rtp_parse_close(rtsp_st->transport_priv);
accc248f 839 }
8b1ab7bf
FB
840 if (rtsp_st->rtp_handle)
841 url_close(rtsp_st->rtp_handle);
4934884a
RM
842 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
843 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 844 }
8b1ab7bf
FB
845 }
846 av_free(rt->rtsp_streams);
847}
848
ee0cb67f
RB
849static int
850rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
851{
accc248f 852 RTSPState *rt = s->priv_data;
ee0cb67f
RB
853 AVStream *st = NULL;
854
a6789dca
RB
855 /* open the RTP context */
856 if (rtsp_st->stream_index >= 0)
857 st = s->streams[rtsp_st->stream_index];
858 if (!st)
859 s->ctx_flags |= AVFMTCTX_NOHEADER;
accc248f
RB
860
861 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 862 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
accc248f
RB
863 rtsp_st->dynamic_protocol_context,
864 rtsp_st->dynamic_handler);
865 else
0a861b6f 866 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
5c918b27
RB
867 rtsp_st->sdp_payload_type,
868 &rtsp_st->rtp_payload_data);
a6789dca 869
0a861b6f 870 if (!rtsp_st->transport_priv) {
a6789dca 871 return AVERROR(ENOMEM);
accc248f 872 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
a6789dca 873 if(rtsp_st->dynamic_handler) {
0a861b6f 874 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
99a1d191
RB
875 rtsp_st->dynamic_protocol_context,
876 rtsp_st->dynamic_handler);
ee0cb67f 877 }
a6789dca 878 }
ee0cb67f
RB
879
880 return 0;
881}
882
53620bba
RB
883/**
884 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
885 */
886static int
e9dea59f 887make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 888 int lower_transport, const char *real_challenge)
1617ad97
FB
889{
890 RTSPState *rt = s->priv_data;
d1c6e47c 891 int j, i, err, interleave = 0;
1617ad97 892 RTSPStream *rtsp_st;
a9e534d5 893 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 894 char cmd[2048];
e9dea59f
RB
895 const char *trans_pref;
896
119b4668 897 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
898 trans_pref = "x-pn-tng";
899 else
900 trans_pref = "RTP/AVP";
115329f1 901
1617ad97
FB
902 /* for each stream, make the setup request */
903 /* XXX: we assume the same server is used for the control of each
904 RTSP stream */
d1ccf0e0
RD
905
906 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
907 char transport[2048];
908
8b1ab7bf 909 rtsp_st = rt->rtsp_streams[i];
1617ad97 910
1617ad97 911 /* RTP/UDP */
90abbdba 912 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 913 char buf[256];
85fb7b34
FB
914
915 /* first try in specified port range */
d1ccf0e0
RD
916 if (RTSP_RTP_PORT_MIN != 0) {
917 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 918 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 919 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 920 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 921 goto rtp_opened;
d1ccf0e0 922 }
85fb7b34 923 }
1617ad97 924 }
85fb7b34 925
d1ccf0e0
RD
926/* then try on any port
927** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
928** err = AVERROR_INVALIDDATA;
929** goto fail;
930** }
931*/
85fb7b34
FB
932
933 rtp_opened:
8b1ab7bf 934 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 935 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
936 "%s/UDP;", trans_pref);
937 if (rt->server_type != RTSP_SERVER_REAL)
938 av_strlcat(transport, "unicast;", sizeof(transport));
939 av_strlcatf(transport, sizeof(transport),
940 "client_port=%d", port);
119b4668 941 if (rt->transport == RTSP_TRANSPORT_RTP)
e9dea59f 942 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
943 }
944
945 /* RTP/TCP */
90abbdba 946 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
947 /** For WMS streams, the application streams are only used for
948 * UDP. When trying to set it up for TCP streams, the server
949 * will return an error. Therefore, we skip those streams. */
950 if (rt->server_type == RTSP_SERVER_WMS &&
951 s->streams[rtsp_st->stream_index]->codec->codec_type == CODEC_TYPE_DATA)
952 continue;
0ad306bc 953 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
954 "%s/TCP;", trans_pref);
955 if (rt->server_type == RTSP_SERVER_WMS)
956 av_strlcat(transport, "unicast;", sizeof(transport));
957 av_strlcatf(transport, sizeof(transport),
958 "interleaved=%d-%d",
959 interleave, interleave + 1);
960 interleave += 2;
1617ad97
FB
961 }
962
90abbdba 963 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 964 snprintf(transport, sizeof(transport) - 1,
e9dea59f 965 "%s/UDP;multicast", trans_pref);
1617ad97 966 }
d1c6e47c
RB
967 if (rt->server_type == RTSP_SERVER_REAL ||
968 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 969 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 970 snprintf(cmd, sizeof(cmd),
b6892136
FB
971 "SETUP %s RTSP/1.0\r\n"
972 "Transport: %s\r\n",
1617ad97 973 rtsp_st->control_url, transport);
2e889ae4 974 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
975 char real_res[41], real_csum[9];
976 ff_rdt_calc_response_and_checksum(real_res, real_csum,
977 real_challenge);
978 av_strlcatf(cmd, sizeof(cmd),
979 "If-Match: %s\r\n"
980 "RealChallenge2: %s, sd=%s\r\n",
981 rt->session_id, real_res, real_csum);
982 }
1617ad97 983 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
984 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
985 err = 1;
986 goto fail;
7e6ca34f
RB
987 } else if (reply->status_code != RTSP_STATUS_OK ||
988 reply->nb_transports != 1) {
1617ad97
FB
989 err = AVERROR_INVALIDDATA;
990 goto fail;
991 }
992
993 /* XXX: same protocol for all streams is required */
994 if (i > 0) {
119b4668
RB
995 if (reply->transports[0].lower_transport != rt->lower_transport ||
996 reply->transports[0].transport != rt->transport) {
1617ad97
FB
997 err = AVERROR_INVALIDDATA;
998 goto fail;
999 }
1000 } else {
90abbdba 1001 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1002 rt->transport = reply->transports[0].transport;
1617ad97
FB
1003 }
1004
1005 /* close RTP connection if not choosen */
90abbdba
RB
1006 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1007 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1008 url_close(rtsp_st->rtp_handle);
1009 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1010 }
1011
90abbdba
RB
1012 switch(reply->transports[0].lower_transport) {
1013 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1014 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1015 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1016 break;
115329f1 1017
90abbdba 1018 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
1019 {
1020 char url[1024];
115329f1 1021
1617ad97 1022 /* XXX: also use address if specified */
115329f1 1023 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1024 host, reply->transports[0].server_port_min);
8b1ab7bf 1025 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1026 err = AVERROR_INVALIDDATA;
1027 goto fail;
1028 }
1029 }
1030 break;
90abbdba 1031 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1032 {
1033 char url[1024];
d02678ec 1034 struct in_addr in;
1617ad97 1035
d02678ec 1036 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1037 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1038 inet_ntoa(in),
1039 reply->transports[0].port_min,
1040 reply->transports[0].ttl);
dbf30963 1041 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1042 err = AVERROR_INVALIDDATA;
1043 goto fail;
1044 }
1045 }
1046 break;
1047 }
d1ccf0e0 1048
ee0cb67f 1049 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1050 goto fail;
1617ad97
FB
1051 }
1052
2e889ae4 1053 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1054 rt->need_subscription = 1;
1055
53620bba
RB
1056 return 0;
1057
1058fail:
8a8754d8
RB
1059 for (i=0; i<rt->nb_rtsp_streams; i++) {
1060 if (rt->rtsp_streams[i]->rtp_handle) {
1061 url_close(rt->rtsp_streams[i]->rtp_handle);
1062 rt->rtsp_streams[i]->rtp_handle = NULL;
1063 }
1064 }
53620bba
RB
1065 return err;
1066}
1067
1068static int rtsp_read_header(AVFormatContext *s,
1069 AVFormatParameters *ap)
1070{
1071 RTSPState *rt = s->priv_data;
1072 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1073 URLContext *rtsp_hd;
1074 int port, ret, err;
a9e534d5 1075 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1076 unsigned char *content = NULL;
90abbdba 1077 int lower_transport_mask = 0;
1cf151e9 1078 char real_challenge[64];
53620bba
RB
1079
1080 /* extract hostname and port */
1081 url_split(NULL, 0, NULL, 0,
1082 host, sizeof(host), &port, path, sizeof(path), s->filename);
1083 if (port < 0)
1084 port = RTSP_DEFAULT_PORT;
1085
1086 /* search for options */
1087 option_list = strchr(path, '?');
1088 if (option_list) {
1089 /* remove the options from the path */
1090 *option_list++ = 0;
1091 while(option_list) {
1092 /* move the option pointer */
1093 option = option_list;
1094 option_list = strchr(option_list, '&');
1095 if (option_list)
1096 *(option_list++) = 0;
1097 /* handle the options */
1098 if (strcmp(option, "udp") == 0)
90abbdba 1099 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1100 else if (strcmp(option, "multicast") == 0)
90abbdba 1101 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1102 else if (strcmp(option, "tcp") == 0)
90abbdba 1103 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1104 }
1105 }
1106
90abbdba 1107 if (!lower_transport_mask)
2a1d51c5 1108 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba
RB
1109
1110 /* open the tcp connexion */
1111 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1112 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1113 return AVERROR(EIO);
1114 rt->rtsp_hd = rtsp_hd;
1115 rt->seq = 0;
1116
1cf151e9
RB
1117 /* request options supported by the server; this also detects server type */
1118 for (rt->server_type = RTSP_SERVER_RTP;;) {
1119 snprintf(cmd, sizeof(cmd),
1120 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1121 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1122 av_strlcat(cmd,
1123 /**
1124 * The following entries are required for proper
1125 * streaming from a Realmedia server. They are
1126 * interdependent in some way although we currently
1127 * don't quite understand how. Values were copied
1128 * from mplayer SVN r23589.
1129 * @param CompanyID is a 16-byte ID in base64
1130 * @param ClientChallenge is a 16-byte ID in hex
1131 */
1132 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1133 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1134 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1135 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1136 sizeof(cmd));
1137 rtsp_send_cmd(s, cmd, reply, NULL);
1138 if (reply->status_code != RTSP_STATUS_OK) {
1139 err = AVERROR_INVALIDDATA;
1140 goto fail;
1141 }
1142
1143 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1144 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1145 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1146 continue;
7a86bafa
RB
1147 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1148 rt->server_type = RTSP_SERVER_WMS;
2e889ae4 1149 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1150 strcpy(real_challenge, reply->real_challenge);
1151 }
1152 break;
1153 }
1154
53620bba
RB
1155 /* describe the stream */
1156 snprintf(cmd, sizeof(cmd),
1157 "DESCRIBE %s RTSP/1.0\r\n"
1158 "Accept: application/sdp\r\n",
1159 s->filename);
2e889ae4 1160 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1161 /**
1162 * The Require: attribute is needed for proper streaming from
1163 * Realmedia servers.
1164 */
1165 av_strlcat(cmd,
1166 "Require: com.real.retain-entity-for-setup\r\n",
1167 sizeof(cmd));
1168 }
53620bba
RB
1169 rtsp_send_cmd(s, cmd, reply, &content);
1170 if (!content) {
1171 err = AVERROR_INVALIDDATA;
1172 goto fail;
1173 }
1174 if (reply->status_code != RTSP_STATUS_OK) {
1175 err = AVERROR_INVALIDDATA;
1176 goto fail;
1177 }
1178
1179 /* now we got the SDP description, we parse it */
1180 ret = sdp_parse(s, (const char *)content);
1181 av_freep(&content);
1182 if (ret < 0) {
1183 err = AVERROR_INVALIDDATA;
1184 goto fail;
1185 }
1186
8a8754d8 1187 do {
90abbdba 1188 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1189
90abbdba 1190 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1191 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1192 real_challenge : NULL);
8a8754d8 1193 if (err < 0)
7e6ca34f 1194 goto fail;
90abbdba
RB
1195 lower_transport_mask &= ~(1 << lower_transport);
1196 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1197 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1198 goto fail;
1199 }
1200 } while (err);
53620bba 1201
ff762d6e
FB
1202 rt->state = RTSP_STATE_IDLE;
1203 rt->seek_timestamp = 0; /* default is to start stream at position
1204 zero */
c04c3282 1205 if (ap->initial_pause) {
ff762d6e
FB
1206 /* do not start immediately */
1207 } else {
1208 if (rtsp_read_play(s) < 0) {
1209 err = AVERROR_INVALIDDATA;
1617ad97
FB
1210 goto fail;
1211 }
1212 }
1617ad97
FB
1213 return 0;
1214 fail:
8b1ab7bf 1215 rtsp_close_streams(rt);
1617ad97
FB
1216 av_freep(&content);
1217 url_close(rt->rtsp_hd);
1218 return err;
1219}
1220
8b1ab7bf
FB
1221static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1222 uint8_t *buf, int buf_size)
1617ad97
FB
1223{
1224 RTSPState *rt = s->priv_data;
b6892136 1225 int id, len, i, ret;
1617ad97 1226 RTSPStream *rtsp_st;
1617ad97 1227
b6892136
FB
1228#ifdef DEBUG_RTP_TCP
1229 printf("tcp_read_packet:\n");
1230#endif
1617ad97
FB
1231 redo:
1232 for(;;) {
2a42b5c3 1233 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1234#ifdef DEBUG_RTP_TCP
1235 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1236#endif
1237 if (ret != 1)
8b1ab7bf 1238 return -1;
b6892136 1239 if (buf[0] == '$')
1617ad97
FB
1240 break;
1241 }
2a42b5c3 1242 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1243 if (ret != 3)
8b1ab7bf 1244 return -1;
b6892136 1245 id = buf[0];
80fb8234 1246 len = AV_RB16(buf + 1);
b6892136
FB
1247#ifdef DEBUG_RTP_TCP
1248 printf("id=%d len=%d\n", id, len);
1249#endif
8b1ab7bf 1250 if (len > buf_size || len < 12)
1617ad97
FB
1251 goto redo;
1252 /* get the data */
2a42b5c3 1253 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1254 if (ret != len)
8b1ab7bf 1255 return -1;
985b05d3 1256 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1257 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1258 return -1;
115329f1 1259
1617ad97 1260 /* find the matching stream */
8b1ab7bf
FB
1261 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1262 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1263 if (id >= rtsp_st->interleaved_min &&
1264 id <= rtsp_st->interleaved_max)
1617ad97
FB
1265 goto found;
1266 }
1267 goto redo;
1268 found:
8b1ab7bf
FB
1269 *prtsp_st = rtsp_st;
1270 return len;
1617ad97
FB
1271}
1272
115329f1 1273static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1274 uint8_t *buf, int buf_size)
1617ad97 1275{
8b1ab7bf 1276 RTSPState *rt = s->priv_data;
1617ad97
FB
1277 RTSPStream *rtsp_st;
1278 fd_set rfds;
1279 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1280 struct timeval tv;
1281
1282 for(;;) {
b7b8fc34 1283 if (url_interrupt_cb())
a960a1e0 1284 return AVERROR(EINTR);
1617ad97
FB
1285 FD_ZERO(&rfds);
1286 fd_max = -1;
8b1ab7bf
FB
1287 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1288 rtsp_st = rt->rtsp_streams[i];
1617ad97 1289 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1290 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1291 if (fd1 > fd_max)
1292 fd_max = fd1;
1293 FD_SET(fd1, &rfds);
1294 }
1617ad97 1295 tv.tv_sec = 0;
b7b8fc34 1296 tv.tv_usec = 100 * 1000;
1617ad97
FB
1297 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1298 if (n > 0) {
8b1ab7bf
FB
1299 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1300 rtsp_st = rt->rtsp_streams[i];
1301 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1302 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1303 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1304 if (ret > 0) {
1305 *prtsp_st = rtsp_st;
1617ad97
FB
1306 return ret;
1307 }
1308 }
1309 }
1310 }
1311 }
1312}
1313
1314static int rtsp_read_packet(AVFormatContext *s,
1315 AVPacket *pkt)
1316{
1317 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1318 RTSPStream *rtsp_st;
1319 int ret, len;
e49906c3 1320 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
8b1ab7bf 1321
572c6a38 1322 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1323 int i;
a9e534d5 1324 RTSPMessageHeader reply1, *reply = &reply1;
572c6a38 1325 enum AVDiscard cache[MAX_STREAMS];
1256d16b
RB
1326 char cmd[1024];
1327
572c6a38
RB
1328 for (i = 0; i < s->nb_streams; i++)
1329 cache[i] = s->streams[i]->discard;
1330
1331 if (!rt->need_subscription) {
1332 if (memcmp (cache, rt->real_setup_cache,
1333 sizeof(enum AVDiscard) * s->nb_streams)) {
1334 av_strlcatf(cmd, sizeof(cmd),
1335 "SET_PARAMETER %s RTSP/1.0\r\n"
1336 "Unsubscribe: %s\r\n",
1337 s->filename, rt->last_subscription);
1338 rtsp_send_cmd(s, cmd, reply, NULL);
1339 if (reply->status_code != RTSP_STATUS_OK)
1340 return AVERROR_INVALIDDATA;
1341 rt->need_subscription = 1;
1342 }
1256d16b 1343 }
1256d16b 1344
572c6a38
RB
1345 if (rt->need_subscription) {
1346 int r, rule_nr, first = 1;
1347
1348 memcpy(rt->real_setup_cache, cache,
1349 sizeof(enum AVDiscard) * s->nb_streams);
1350 rt->last_subscription[0] = 0;
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 rule_nr = 0;
1358 for (r = 0; r < s->nb_streams; r++) {
1359 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1360 if (s->streams[r]->discard != AVDISCARD_ALL) {
1361 if (!first)
1362 av_strlcat(rt->last_subscription, ",",
1363 sizeof(rt->last_subscription));
1364 ff_rdt_subscribe_rule(
1365 rt->last_subscription,
1366 sizeof(rt->last_subscription), i, rule_nr);
1367 first = 0;
1368 }
1369 rule_nr++;
1370 }
1371 }
1372 }
1373 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1374 rtsp_send_cmd(s, cmd, reply, NULL);
1375 if (reply->status_code != RTSP_STATUS_OK)
1376 return AVERROR_INVALIDDATA;
1377 rt->need_subscription = 0;
1378
1379 if (rt->state == RTSP_STATE_PLAYING)
1380 rtsp_read_play (s);
1381 }
1256d16b
RB
1382 }
1383
8b1ab7bf 1384 /* get next frames from the same RTP packet */
0a861b6f 1385 if (rt->cur_transport_priv) {
119b4668 1386 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 1387 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
4fce284c 1388 else
0a861b6f 1389 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
8b1ab7bf 1390 if (ret == 0) {
0a861b6f 1391 rt->cur_transport_priv = NULL;
8b1ab7bf
FB
1392 return 0;
1393 } else if (ret == 1) {
1394 return 0;
1395 } else {
0a861b6f 1396 rt->cur_transport_priv = NULL;
8b1ab7bf
FB
1397 }
1398 }
1617ad97 1399
8b1ab7bf
FB
1400 /* read next RTP packet */
1401 redo:
90abbdba 1402 switch(rt->lower_transport) {
1617ad97 1403 default:
90abbdba 1404 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1405 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1406 break;
90abbdba
RB
1407 case RTSP_LOWER_TRANSPORT_UDP:
1408 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1409 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
0a861b6f
RB
1410 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1411 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1617ad97
FB
1412 break;
1413 }
8b1ab7bf 1414 if (len < 0)
489b0d4d 1415 return len;
119b4668 1416 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 1417 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
4fce284c 1418 else
0a861b6f 1419 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
8b1ab7bf
FB
1420 if (ret < 0)
1421 goto redo;
1422 if (ret == 1) {
1423 /* more packets may follow, so we save the RTP context */
0a861b6f 1424 rt->cur_transport_priv = rtsp_st->transport_priv;
8b1ab7bf
FB
1425 }
1426 return 0;
1617ad97
FB
1427}
1428
ff762d6e 1429static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1430{
ff762d6e 1431 RTSPState *rt = s->priv_data;
a9e534d5 1432 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1433 char cmd[1024];
1434
bc874dae 1435 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1436
2e889ae4 1437 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1438 if (rt->state == RTSP_STATE_PAUSED) {
1439 snprintf(cmd, sizeof(cmd),
1440 "PLAY %s RTSP/1.0\r\n",
1441 s->filename);
1442 } else {
1443 snprintf(cmd, sizeof(cmd),
1444 "PLAY %s RTSP/1.0\r\n"
1445 "Range: npt=%0.3f-\r\n",
1446 s->filename,
1447 (double)rt->seek_timestamp / AV_TIME_BASE);
1448 }
1449 rtsp_send_cmd(s, cmd, reply, NULL);
1450 if (reply->status_code != RTSP_STATUS_OK) {
1451 return -1;
1452 }
1256d16b 1453 }
5f86057f
RB
1454 rt->state = RTSP_STATE_PLAYING;
1455 return 0;
b7b8fc34
FB
1456}
1457
ff762d6e
FB
1458/* pause the stream */
1459static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1460{
ff762d6e 1461 RTSPState *rt = s->priv_data;
a9e534d5 1462 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1463 char cmd[1024];
1464
b7b8fc34 1465 rt = s->priv_data;
115329f1 1466
ff762d6e
FB
1467 if (rt->state != RTSP_STATE_PLAYING)
1468 return 0;
2e889ae4 1469 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1470 snprintf(cmd, sizeof(cmd),
1471 "PAUSE %s RTSP/1.0\r\n",
1472 s->filename);
1473 rtsp_send_cmd(s, cmd, reply, NULL);
1474 if (reply->status_code != RTSP_STATUS_OK) {
1475 return -1;
1476 }
1256d16b 1477 }
5f86057f
RB
1478 rt->state = RTSP_STATE_PAUSED;
1479 return 0;
b7b8fc34
FB
1480}
1481
115329f1 1482static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1483 int64_t timestamp, int flags)
ff762d6e
FB
1484{
1485 RTSPState *rt = s->priv_data;
115329f1 1486
50755217 1487 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1488 switch(rt->state) {
1489 default:
1490 case RTSP_STATE_IDLE:
1491 break;
1492 case RTSP_STATE_PLAYING:
1493 if (rtsp_read_play(s) != 0)
1494 return -1;
1495 break;
1496 case RTSP_STATE_PAUSED:
1497 rt->state = RTSP_STATE_IDLE;
1498 break;
1499 }
1500 return 0;
1501}
1502
1617ad97
FB
1503static int rtsp_read_close(AVFormatContext *s)
1504{
1505 RTSPState *rt = s->priv_data;
a9e534d5 1506 RTSPMessageHeader reply1, *reply = &reply1;
1617ad97
FB
1507 char cmd[1024];
1508
b6892136 1509#if 0
1617ad97 1510 /* NOTE: it is valid to flush the buffer here */
90abbdba 1511 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1512 url_fclose(&rt->rtsp_gb);
1513 }
b6892136 1514#endif
115329f1 1515 snprintf(cmd, sizeof(cmd),
b6892136 1516 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1517 s->filename);
1518 rtsp_send_cmd(s, cmd, reply, NULL);
1519
8b1ab7bf 1520 rtsp_close_streams(rt);
1617ad97
FB
1521 url_close(rt->rtsp_hd);
1522 return 0;
1523}
1524
b250f9c6 1525#if CONFIG_RTSP_DEMUXER
d2a067d1 1526AVInputFormat rtsp_demuxer = {
1617ad97 1527 "rtsp",
bde15e74 1528 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1529 sizeof(RTSPState),
1530 rtsp_probe,
1531 rtsp_read_header,
1532 rtsp_read_packet,
1533 rtsp_read_close,
ff762d6e 1534 rtsp_read_seek,
bb76a117 1535 .flags = AVFMT_NOFILE,
ff762d6e
FB
1536 .read_play = rtsp_read_play,
1537 .read_pause = rtsp_read_pause,
1617ad97 1538};
96862926 1539#endif
1617ad97 1540
cb1fdc61 1541static int sdp_probe(AVProbeData *p1)
93ced3e8 1542{
0e1ceacd 1543 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1544
1545 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1546 while (p < p_end && *p != '\0') {
f7d78f36 1547 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1548 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1549
1550 while(p < p_end - 1 && *p != '\n') p++;
1551 if (++p >= p_end)
cb1fdc61 1552 break;
cb1fdc61
FB
1553 if (*p == '\r')
1554 p++;
1555 }
93ced3e8
FB
1556 return 0;
1557}
1558
1559#define SDP_MAX_SIZE 8192
1560
1561static int sdp_read_header(AVFormatContext *s,
1562 AVFormatParameters *ap)
1563{
8b1ab7bf 1564 RTSPState *rt = s->priv_data;
93ced3e8
FB
1565 RTSPStream *rtsp_st;
1566 int size, i, err;
1567 char *content;
1568 char url[1024];
1569
1570 /* read the whole sdp file */
1571 /* XXX: better loading */
1572 content = av_malloc(SDP_MAX_SIZE);
899681cd 1573 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1574 if (size <= 0) {
1575 av_free(content);
1576 return AVERROR_INVALIDDATA;
1577 }
1578 content[size] ='\0';
1579
1580 sdp_parse(s, content);
1581 av_free(content);
1582
1583 /* open each RTP stream */
8b1ab7bf
FB
1584 for(i=0;i<rt->nb_rtsp_streams;i++) {
1585 rtsp_st = rt->rtsp_streams[i];
115329f1 1586
d2bf42be 1587 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1588 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1589 rtsp_st->sdp_port,
d2bf42be 1590 rtsp_st->sdp_port,
93ced3e8 1591 rtsp_st->sdp_ttl);
dbf30963 1592 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1593 err = AVERROR_INVALIDDATA;
1594 goto fail;
1595 }
ee0cb67f 1596 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1597 goto fail;
93ced3e8
FB
1598 }
1599 return 0;
1600 fail:
8b1ab7bf 1601 rtsp_close_streams(rt);
93ced3e8
FB
1602 return err;
1603}
1604
1605static int sdp_read_packet(AVFormatContext *s,
1606 AVPacket *pkt)
1607{
8b1ab7bf 1608 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1609}
1610
1611static int sdp_read_close(AVFormatContext *s)
1612{
8b1ab7bf
FB
1613 RTSPState *rt = s->priv_data;
1614 rtsp_close_streams(rt);
93ced3e8
FB
1615 return 0;
1616}
1617
b250f9c6 1618#if CONFIG_SDP_DEMUXER
ff70e601 1619AVInputFormat sdp_demuxer = {
93ced3e8 1620 "sdp",
bde15e74 1621 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1622 sizeof(RTSPState),
1623 sdp_probe,
1624 sdp_read_header,
1625 sdp_read_packet,
1626 sdp_read_close,
1627};
ff70e601 1628#endif
93ced3e8 1629
b250f9c6 1630#if CONFIG_REDIR_DEMUXER
1617ad97
FB
1631/* dummy redirector format (used directly in av_open_input_file now) */
1632static int redir_probe(AVProbeData *pd)
1633{
1634 const char *p;
1635 p = pd->buf;
1636 while (redir_isspace(*p))
1637 p++;
f7d78f36
MR
1638 if (av_strstart(p, "http://", NULL) ||
1639 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1640 return AVPROBE_SCORE_MAX;
1641 return 0;
1642}
1643
e8acf0ed 1644static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1645{
1646 char buf[4096], *q;
1647 int c;
1648 AVFormatContext *ic = NULL;
e8acf0ed 1649 ByteIOContext *f = s->pb;
1617ad97
FB
1650
1651 /* parse each URL and try to open it */
1652 c = url_fgetc(f);
1653 while (c != URL_EOF) {
1654 /* skip spaces */
1655 for(;;) {
1656 if (!redir_isspace(c))
1657 break;
1658 c = url_fgetc(f);
1659 }
1660 if (c == URL_EOF)
1661 break;
1662 /* record url */
1663 q = buf;
1664 for(;;) {
1665 if (c == URL_EOF || redir_isspace(c))
1666 break;
1667 if ((q - buf) < sizeof(buf) - 1)
1668 *q++ = c;
1669 c = url_fgetc(f);
1670 }
1671 *q = '\0';
1672 //printf("URL='%s'\n", buf);
1673 /* try to open the media file */
1674 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1675 break;
1676 }
1617ad97 1677 if (!ic)
6f3e0b21 1678 return AVERROR(EIO);
e8acf0ed
LA
1679
1680 *s = *ic;
1681 url_fclose(f);
1682
1683 return 0;
1617ad97
FB
1684}
1685
d2a067d1 1686AVInputFormat redir_demuxer = {
1617ad97 1687 "redir",
bde15e74 1688 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1689 0,
1690 redir_probe,
e8acf0ed 1691 redir_read_header,
1617ad97
FB
1692 NULL,
1693 NULL,
1694};
e7047005 1695#endif