Also copy pixel_aspect when copying the picref in avfilter_start_frame.
[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,
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"
6a5d31ac 26#include "libavutil/intreadwrite.h"
1617ad97
FB
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"
1a30d541 39#include "rtp_asf.h"
4934884a 40
1617ad97 41//#define DEBUG
b6892136 42//#define DEBUG_RTP_TCP
1617ad97 43
ff762d6e
FB
44static int rtsp_read_play(AVFormatContext *s);
45
c482500f 46#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 47int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 48#endif
85fb7b34 49
1617ad97
FB
50static int rtsp_probe(AVProbeData *p)
51{
f7d78f36 52 if (av_strstart(p->filename, "rtsp:", NULL))
1617ad97
FB
53 return AVPROBE_SCORE_MAX;
54 return 0;
55}
56
1ef36a70 57#define SPACE_CHARS " \t\r\n"
da1e126e
RB
58/* we use memchr() instead of strchr() here because strchr() will return
59 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
60#define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
1617ad97
FB
61static void skip_spaces(const char **pp)
62{
63 const char *p;
64 p = *pp;
65 while (redir_isspace(*p))
66 p++;
67 *pp = p;
68}
69
1ef36a70
RB
70static void get_word_until_chars(char *buf, int buf_size,
71 const char *sep, const char **pp)
1617ad97
FB
72{
73 const char *p;
74 char *q;
75
76 p = *pp;
77 skip_spaces(&p);
78 q = buf;
79 while (!strchr(sep, *p) && *p != '\0') {
80 if ((q - buf) < buf_size - 1)
81 *q++ = *p;
82 p++;
83 }
84 if (buf_size > 0)
85 *q = '\0';
86 *pp = p;
87}
88
1ef36a70
RB
89static void get_word_sep(char *buf, int buf_size, const char *sep,
90 const char **pp)
1617ad97 91{
1ef36a70
RB
92 if (**pp == '/') (*pp)++;
93 get_word_until_chars(buf, buf_size, sep, pp);
94}
1617ad97 95
1ef36a70
RB
96static void get_word(char *buf, int buf_size, const char **pp)
97{
98 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
1617ad97
FB
99}
100
93ced3e8
FB
101/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
102 params>] */
4934884a 103static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
93ced3e8
FB
104{
105 char buf[256];
d1ccf0e0
RD
106 int i;
107 AVCodec *c;
7b49ce2e 108 const char *c_name;
93ced3e8 109
d1ccf0e0
RD
110 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
111 see if we can handle this kind of payload */
93ced3e8 112 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 113 if (payload_type >= RTP_PT_PRIVATE) {
4934884a
RM
114 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
115 while(handler) {
743b3890 116 if (!strcasecmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
4934884a
RM
117 codec->codec_id = handler->codec_id;
118 rtsp_st->dynamic_handler= handler;
119 if(handler->open) {
120 rtsp_st->dynamic_protocol_context= handler->open();
121 }
d1ccf0e0
RD
122 break;
123 }
4934884a
RM
124 handler= handler->next;
125 }
93ced3e8 126 } else {
d1ccf0e0
RD
127 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
128 /* search into AVRtpPayloadTypes[] */
7ed19d7f 129 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
130 }
131
132 c = avcodec_find_decoder(codec->codec_id);
133 if (c && c->name)
7b49ce2e 134 c_name = c->name;
d1ccf0e0
RD
135 else
136 c_name = (char *)NULL;
137
138 if (c_name) {
139 get_word_sep(buf, sizeof(buf), "/", &p);
140 i = atoi(buf);
141 switch (codec->codec_type) {
142 case CODEC_TYPE_AUDIO:
143 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
144 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
145 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
146 if (i > 0) {
147 codec->sample_rate = i;
148 get_word_sep(buf, sizeof(buf), "/", &p);
149 i = atoi(buf);
150 if (i > 0)
151 codec->channels = i;
d0deedcb
RM
152 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
153 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
d1ccf0e0
RD
154 }
155 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
156 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
157 break;
158 case CODEC_TYPE_VIDEO:
159 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
160 break;
161 default:
162 break;
163 }
164 return 0;
93ced3e8 165 }
d1ccf0e0
RD
166
167 return -1;
93ced3e8
FB
168}
169
170/* return the length and optionnaly the data */
171static int hex_to_data(uint8_t *data, const char *p)
172{
173 int c, len, v;
174
175 len = 0;
176 v = 1;
177 for(;;) {
178 skip_spaces(&p);
6a8c8b36 179 if (*p == '\0')
93ced3e8
FB
180 break;
181 c = toupper((unsigned char)*p++);
182 if (c >= '0' && c <= '9')
183 c = c - '0';
184 else if (c >= 'A' && c <= 'F')
185 c = c - 'A' + 10;
186 else
187 break;
188 v = (v << 4) | c;
189 if (v & 0x100) {
190 if (data)
191 data[len] = v;
192 len++;
193 v = 1;
194 }
195 }
196 return len;
197}
198
d1ccf0e0
RD
199static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
200{
201 switch (codec->codec_id) {
202 case CODEC_ID_MPEG4:
cbee7a69 203 case CODEC_ID_AAC:
d1ccf0e0
RD
204 if (!strcmp(attr, "config")) {
205 /* decode the hexa encoded parameter */
206 int len = hex_to_data(NULL, value);
7d09a993
RB
207 if (codec->extradata)
208 av_free(codec->extradata);
d1ccf0e0
RD
209 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
210 if (!codec->extradata)
211 return;
212 codec->extradata_size = len;
213 hex_to_data(codec->extradata, value);
214 }
215 break;
216 default:
217 break;
218 }
219 return;
220}
221
644e7acb 222typedef struct {
7b49ce2e 223 const char *str;
d1ccf0e0
RD
224 uint16_t type;
225 uint32_t offset;
644e7acb 226} AttrNameMap;
d1ccf0e0
RD
227
228/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
229#define ATTR_NAME_TYPE_INT 0
230#define ATTR_NAME_TYPE_STR 1
644e7acb 231static const AttrNameMap attr_names[]=
d1ccf0e0 232{
be73a544
LA
233 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
234 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
235 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
236 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
237 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
238 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
d1ccf0e0
RD
239 {NULL, -1, -1},
240};
241
d0deedcb
RM
242/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
243* because it is used in rtp_h264.c, which is forthcoming.
244*/
245int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
246{
247 skip_spaces(p);
78f731de 248 if(**p) {
d0deedcb
RM
249 get_word_sep(attr, attr_size, "=", p);
250 if (**p == '=')
251 (*p)++;
252 get_word_sep(value, value_size, ";", p);
253 if (**p == ';')
254 (*p)++;
255 return 1;
256 }
257 return 0;
258}
259
d1ccf0e0
RD
260/* parse a SDP line and save stream attributes */
261static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
262{
263 char attr[256];
264 char value[4096];
d1ccf0e0
RD
265 int i;
266
267 RTSPStream *rtsp_st = st->priv_data;
01f4895c 268 AVCodecContext *codec = st->codec;
be73a544 269 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
270
271 /* loop on each attribute */
1ad20f96
RM
272 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
273 {
bb270c08 274 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
275 sdp_parse_fmtp_config(codec, attr, value);
276 /* Looking for a known attribute */
277 for (i = 0; attr_names[i].str; ++i) {
278 if (!strcasecmp(attr, attr_names[i].str)) {
279 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
280 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
281 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
282 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 283 }
93ced3e8 284 }
93ced3e8
FB
285 }
286}
287
31693e00
RM
288/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
289 * and end time.
290 * Used for seeking in the rtp stream.
291 */
292static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
293{
294 char buf[256];
295
296 skip_spaces(&p);
f7d78f36 297 if (!av_stristart(p, "npt=", &p))
31693e00
RM
298 return;
299
300 *start = AV_NOPTS_VALUE;
301 *end = AV_NOPTS_VALUE;
302
303 get_word_sep(buf, sizeof(buf), "-", &p);
304 *start = parse_date(buf, 1);
305 if (*p == '-') {
306 p++;
307 get_word_sep(buf, sizeof(buf), "-", &p);
308 *end = parse_date(buf, 1);
309 }
310// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
311// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
312}
313
93ced3e8
FB
314typedef struct SDPParseState {
315 /* SDP only */
316 struct in_addr default_ip;
317 int default_ttl;
cb760a47 318 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
319} SDPParseState;
320
321static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
322 int letter, const char *buf)
323{
8b1ab7bf 324 RTSPState *rt = s->priv_data;
1617ad97
FB
325 char buf1[64], st_type[64];
326 const char *p;
fb65d2ca
DP
327 enum CodecType codec_type;
328 int payload_type, i;
1617ad97
FB
329 AVStream *st;
330 RTSPStream *rtsp_st;
93ced3e8
FB
331 struct in_addr sdp_ip;
332 int ttl;
333
1617ad97
FB
334#ifdef DEBUG
335 printf("sdp: %c='%s'\n", letter, buf);
336#endif
337
338 p = buf;
cb760a47
RB
339 if (s1->skip_media && letter != 'm')
340 return;
1617ad97 341 switch(letter) {
93ced3e8
FB
342 case 'c':
343 get_word(buf1, sizeof(buf1), &p);
344 if (strcmp(buf1, "IN") != 0)
345 return;
346 get_word(buf1, sizeof(buf1), &p);
347 if (strcmp(buf1, "IP4") != 0)
348 return;
349 get_word_sep(buf1, sizeof(buf1), "/", &p);
350 if (inet_aton(buf1, &sdp_ip) == 0)
351 return;
352 ttl = 16;
353 if (*p == '/') {
354 p++;
355 get_word_sep(buf1, sizeof(buf1), "/", &p);
356 ttl = atoi(buf1);
357 }
358 if (s->nb_streams == 0) {
359 s1->default_ip = sdp_ip;
360 s1->default_ttl = ttl;
361 } else {
362 st = s->streams[s->nb_streams - 1];
363 rtsp_st = st->priv_data;
364 rtsp_st->sdp_ip = sdp_ip;
365 rtsp_st->sdp_ttl = ttl;
366 }
367 break;
1617ad97 368 case 's':
da61e413 369 av_metadata_set(&s->metadata, "title", p);
1617ad97
FB
370 break;
371 case 'i':
372 if (s->nb_streams == 0) {
da61e413 373 av_metadata_set(&s->metadata, "comment", p);
1617ad97
FB
374 break;
375 }
376 break;
377 case 'm':
378 /* new stream */
cb760a47 379 s1->skip_media = 0;
1617ad97
FB
380 get_word(st_type, sizeof(st_type), &p);
381 if (!strcmp(st_type, "audio")) {
382 codec_type = CODEC_TYPE_AUDIO;
383 } else if (!strcmp(st_type, "video")) {
384 codec_type = CODEC_TYPE_VIDEO;
090438cc
RB
385 } else if (!strcmp(st_type, "application")) {
386 codec_type = CODEC_TYPE_DATA;
1617ad97 387 } else {
cb760a47 388 s1->skip_media = 1;
1617ad97
FB
389 return;
390 }
1617ad97
FB
391 rtsp_st = av_mallocz(sizeof(RTSPStream));
392 if (!rtsp_st)
393 return;
8b1ab7bf
FB
394 rtsp_st->stream_index = -1;
395 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
396
397 rtsp_st->sdp_ip = s1->default_ip;
398 rtsp_st->sdp_ttl = s1->default_ttl;
399
93ced3e8
FB
400 get_word(buf1, sizeof(buf1), &p); /* port */
401 rtsp_st->sdp_port = atoi(buf1);
402
403 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 404
93ced3e8
FB
405 /* XXX: handle list of formats */
406 get_word(buf1, sizeof(buf1), &p); /* format list */
407 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 408
7ed19d7f 409 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
410 /* no corresponding stream */
411 } else {
412 st = av_new_stream(s, 0);
413 if (!st)
414 return;
415 st->priv_data = rtsp_st;
416 rtsp_st->stream_index = st->index;
01f4895c 417 st->codec->codec_type = codec_type;
d1ccf0e0 418 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 419 /* if standard payload type, we can find the codec right now */
bf6d9818 420 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
421 }
422 }
1617ad97 423 /* put a default control url */
75e61b0e 424 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1617ad97
FB
425 break;
426 case 'a':
f7d78f36 427 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
1617ad97
FB
428 char proto[32];
429 /* get the control url */
430 st = s->streams[s->nb_streams - 1];
431 rtsp_st = st->priv_data;
115329f1 432
1617ad97 433 /* XXX: may need to add full url resolution */
6ba5cbc6 434 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
435 if (proto[0] == '\0') {
436 /* relative control URL */
75e61b0e
MR
437 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
438 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 439 } else {
75e61b0e 440 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 441 }
83d14c85 442 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 443 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 444 get_word(buf1, sizeof(buf1), &p);
93ced3e8 445 payload_type = atoi(buf1);
83d14c85 446 st = s->streams[s->nb_streams - 1];
ff16f551
RB
447 rtsp_st = st->priv_data;
448 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
f7d78f36 449 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 450 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 451 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
452 payload_type = atoi(buf1);
453 for(i = 0; i < s->nb_streams;i++) {
454 st = s->streams[i];
455 rtsp_st = st->priv_data;
456 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 457 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 458 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
4934884a
RM
459 sdp_parse_fmtp(st, p);
460 }
461 } else {
ed787542 462 sdp_parse_fmtp(st, p);
4934884a 463 }
93ced3e8
FB
464 }
465 }
f7d78f36 466 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
467 // let dynamic protocol handlers have a stab at the line.
468 get_word(buf1, sizeof(buf1), &p);
469 payload_type = atoi(buf1);
470 for(i = 0; i < s->nb_streams;i++) {
471 st = s->streams[i];
472 rtsp_st = st->priv_data;
473 if (rtsp_st->sdp_payload_type == payload_type) {
474 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 475 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
d0deedcb
RM
476 }
477 }
478 }
f7d78f36 479 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
480 int64_t start, end;
481
482 // this is so that seeking on a streamed file can work.
483 rtsp_parse_range_npt(p, &start, &end);
484 s->start_time= start;
485 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
119b4668
RB
486 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
487 if (atoi(p) == 1)
488 rt->transport = RTSP_TRANSPORT_RDT;
1a30d541
RB
489 } else {
490 if (rt->server_type == RTSP_SERVER_WMS)
491 ff_wms_parse_sdp_a_line(s, p);
492 if (s->nb_streams > 0) {
c4a3d032
RB
493 if (rt->server_type == RTSP_SERVER_REAL)
494 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
495
496 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
497 if (rtsp_st->dynamic_handler &&
498 rtsp_st->dynamic_handler->parse_sdp_a_line)
499 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
500 rtsp_st->dynamic_protocol_context, buf);
1a30d541 501 }
1617ad97
FB
502 }
503 break;
504 }
505}
506
5c91a675 507static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
508{
509 const char *p;
510 int letter;
9211bcdd
RB
511 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
512 * contain long SDP lines containing complete ASF Headers (several
513 * kB) or arrays of MDPR (RM stream descriptor) headers plus
514 * "rulebooks" describing their properties. Therefore, the SDP line
515 * buffer is large. */
e322d3f5 516 char buf[8192], *q;
93ced3e8 517 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 518
93ced3e8 519 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
520 p = content;
521 for(;;) {
522 skip_spaces(&p);
523 letter = *p;
524 if (letter == '\0')
525 break;
526 p++;
527 if (*p != '=')
528 goto next_line;
529 p++;
530 /* get the content */
531 q = buf;
b6892136 532 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
533 if ((q - buf) < sizeof(buf) - 1)
534 *q++ = *p;
535 p++;
536 }
537 *q = '\0';
93ced3e8 538 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
539 next_line:
540 while (*p != '\n' && *p != '\0')
541 p++;
542 if (*p == '\n')
543 p++;
544 }
545 return 0;
546}
547
548static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
549{
550 const char *p;
551 int v;
552
553 p = *pp;
554 skip_spaces(&p);
555 v = strtol(p, (char **)&p, 10);
556 if (*p == '-') {
557 p++;
558 *min_ptr = v;
559 v = strtol(p, (char **)&p, 10);
560 *max_ptr = v;
561 } else {
562 *min_ptr = v;
563 *max_ptr = v;
564 }
565 *pp = p;
566}
567
568/* XXX: only one transport specification is parsed */
a9e534d5 569static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
570{
571 char transport_protocol[16];
572 char profile[16];
573 char lower_transport[16];
574 char parameter[16];
575 RTSPTransportField *th;
576 char buf[256];
115329f1 577
1617ad97 578 reply->nb_transports = 0;
115329f1 579
1617ad97
FB
580 for(;;) {
581 skip_spaces(&p);
582 if (*p == '\0')
583 break;
584
585 th = &reply->transports[reply->nb_transports];
586
115329f1 587 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 588 "/", &p);
e1502118 589 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
590 get_word_sep(profile, sizeof(profile), "/;,", &p);
591 lower_transport[0] = '\0';
592 /* rtp/avp/<protocol> */
593 if (*p == '/') {
7ecc634e
LB
594 get_word_sep(lower_transport, sizeof(lower_transport),
595 ";,", &p);
119b4668
RB
596 }
597 th->transport = RTSP_TRANSPORT_RTP;
598 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
599 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 600 /* x-pn-tng/<protocol> */
e1502118
LB
601 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
602 profile[0] = '\0';
119b4668 603 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 604 }
b6892136 605 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 606 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 607 else
90abbdba 608 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 609
1617ad97
FB
610 if (*p == ';')
611 p++;
612 /* get each parameter */
613 while (*p != '\0' && *p != ',') {
614 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
615 if (!strcmp(parameter, "port")) {
616 if (*p == '=') {
617 p++;
618 rtsp_parse_range(&th->port_min, &th->port_max, &p);
619 }
620 } else if (!strcmp(parameter, "client_port")) {
621 if (*p == '=') {
622 p++;
115329f1 623 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
624 &th->client_port_max, &p);
625 }
626 } else if (!strcmp(parameter, "server_port")) {
627 if (*p == '=') {
628 p++;
115329f1 629 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
630 &th->server_port_max, &p);
631 }
632 } else if (!strcmp(parameter, "interleaved")) {
633 if (*p == '=') {
634 p++;
115329f1 635 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
636 &th->interleaved_max, &p);
637 }
638 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
639 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
640 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
641 } else if (!strcmp(parameter, "ttl")) {
642 if (*p == '=') {
643 p++;
644 th->ttl = strtol(p, (char **)&p, 10);
645 }
646 } else if (!strcmp(parameter, "destination")) {
647 struct in_addr ipaddr;
648
649 if (*p == '=') {
650 p++;
651 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 652 if (inet_aton(buf, &ipaddr))
1617ad97
FB
653 th->destination = ntohl(ipaddr.s_addr);
654 }
655 }
656 while (*p != ';' && *p != '\0' && *p != ',')
657 p++;
658 if (*p == ';')
659 p++;
660 }
661 if (*p == ',')
662 p++;
663
664 reply->nb_transports++;
665 }
666}
667
a9e534d5 668void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
669{
670 const char *p;
671
672 /* NOTE: we do case independent match for broken servers */
673 p = buf;
f7d78f36 674 if (av_stristart(p, "Session:", &p)) {
1617ad97 675 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 676 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 677 reply->content_length = strtol(p, NULL, 10);
f7d78f36 678 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 679 rtsp_parse_transport(reply, p);
f7d78f36 680 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 681 reply->seq = strtol(p, NULL, 10);
f7d78f36 682 } else if (av_stristart(p, "Range:", &p)) {
31693e00 683 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
684 } else if (av_stristart(p, "RealChallenge1:", &p)) {
685 skip_spaces(&p);
686 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
687 } else if (av_stristart(p, "Server:", &p)) {
688 skip_spaces(&p);
689 av_strlcpy(reply->server, p, sizeof(reply->server));
1617ad97
FB
690 }
691}
692
2a42b5c3
LS
693static int url_readbuf(URLContext *h, unsigned char *buf, int size)
694{
695 int ret, len;
696
697 len = 0;
698 while (len < size) {
699 ret = url_read(h, buf+len, size-len);
700 if (ret < 1)
701 return ret;
702 len += ret;
703 }
704 return len;
705}
706
b7b8fc34
FB
707/* skip a RTP/TCP interleaved packet */
708static void rtsp_skip_packet(AVFormatContext *s)
709{
710 RTSPState *rt = s->priv_data;
711 int ret, len, len1;
712 uint8_t buf[1024];
713
2a42b5c3 714 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
715 if (ret != 3)
716 return;
80fb8234 717 len = AV_RB16(buf + 1);
b7b8fc34
FB
718#ifdef DEBUG
719 printf("skipping RTP packet len=%d\n", len);
720#endif
721 /* skip payload */
722 while (len > 0) {
723 len1 = len;
724 if (len1 > sizeof(buf))
725 len1 = sizeof(buf);
2a42b5c3 726 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
727 if (ret != len1)
728 return;
729 len -= len1;
730 }
731}
1617ad97 732
7e726132
RB
733/**
734 * Read a RTSP message from the server, or prepare to read data
735 * packets if we're reading data interleaved over the TCP/RTSP
736 * connection as well.
737 *
738 * @param s RTSP demuxer context
739 * @param reply pointer where the RTSP message header will be stored
740 * @param content_ptr pointer where the RTSP message body, if any, will
741 * be stored (length is in \p reply)
742 * @param return_on_interleaved_data whether the function may return if we
743 * encounter a data marker ('$'), which precedes data
744 * packets over interleaved TCP/RTSP connections. If this
745 * is set, this function will return 1 after encountering
746 * a '$'. If it is not set, the function will skip any
747 * data packets (if they are encountered), until a reply
748 * has been fully parsed. If no more data is available
749 * without parsing a reply, it will return an error.
750 *
751 * @returns 1 if a data packets is ready to be received, -1 on error,
752 * and 0 on success.
753 */
754static int
29b9f58b 755rtsp_read_reply (AVFormatContext *s, RTSPMessageHeader *reply,
7e726132 756 unsigned char **content_ptr, int return_on_interleaved_data)
1617ad97
FB
757{
758 RTSPState *rt = s->priv_data;
759 char buf[4096], buf1[1024], *q;
760 unsigned char ch;
761 const char *p;
7e726132 762 int ret, content_length, line_count = 0;
1617ad97
FB
763 unsigned char *content = NULL;
764
d541a7d2 765 memset(reply, 0, sizeof(*reply));
1617ad97 766
1617ad97 767 /* parse reply (XXX: use buffers) */
1617ad97
FB
768 rt->last_reply[0] = '\0';
769 for(;;) {
770 q = buf;
771 for(;;) {
7e726132
RB
772 ret = url_readbuf(rt->rtsp_hd, &ch, 1);
773#ifdef DEBUG_RTP_TCP
774 printf("ret=%d c=%02x [%c]\n", ret, ch, ch);
775#endif
776 if (ret != 1)
777 return -1;
1617ad97
FB
778 if (ch == '\n')
779 break;
b7b8fc34
FB
780 if (ch == '$') {
781 /* XXX: only parse it if first char on line ? */
7e726132
RB
782 if (return_on_interleaved_data) {
783 return 1;
784 } else
b7b8fc34
FB
785 rtsp_skip_packet(s);
786 } else if (ch != '\r') {
1617ad97
FB
787 if ((q - buf) < sizeof(buf) - 1)
788 *q++ = ch;
789 }
790 }
791 *q = '\0';
792#ifdef DEBUG
793 printf("line='%s'\n", buf);
794#endif
795 /* test if last line */
796 if (buf[0] == '\0')
797 break;
798 p = buf;
799 if (line_count == 0) {
800 /* get reply code */
801 get_word(buf1, sizeof(buf1), &p);
802 get_word(buf1, sizeof(buf1), &p);
803 reply->status_code = atoi(buf1);
804 } else {
805 rtsp_parse_line(reply, p);
75e61b0e
MR
806 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
807 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
808 }
809 line_count++;
810 }
115329f1 811
1617ad97 812 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 813 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 814
1617ad97
FB
815 content_length = reply->content_length;
816 if (content_length > 0) {
817 /* leave some room for a trailing '\0' (useful for simple parsing) */
818 content = av_malloc(content_length + 1);
2a42b5c3 819 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
820 content[content_length] = '\0';
821 }
822 if (content_ptr)
823 *content_ptr = content;
e2e2e7dd
AB
824 else
825 av_free(content);
7e726132
RB
826
827 return 0;
1617ad97
FB
828}
829
29b9f58b
RB
830static void rtsp_send_cmd(AVFormatContext *s,
831 const char *cmd, RTSPMessageHeader *reply,
832 unsigned char **content_ptr)
833{
834 RTSPState *rt = s->priv_data;
835 char buf[4096], buf1[1024];
836
837 rt->seq++;
838 av_strlcpy(buf, cmd, sizeof(buf));
839 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
840 av_strlcat(buf, buf1, sizeof(buf));
841 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
842 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
843 av_strlcat(buf, buf1, sizeof(buf));
844 }
845 av_strlcat(buf, "\r\n", sizeof(buf));
846#ifdef DEBUG
847 printf("Sending:\n%s--\n", buf);
848#endif
849 url_write(rt->rtsp_hd, buf, strlen(buf));
850
7e726132 851 rtsp_read_reply(s, reply, content_ptr, 0);
29b9f58b
RB
852}
853
1617ad97 854
8b1ab7bf
FB
855/* close and free RTSP streams */
856static void rtsp_close_streams(RTSPState *rt)
857{
858 int i;
859 RTSPStream *rtsp_st;
860
861 for(i=0;i<rt->nb_rtsp_streams;i++) {
862 rtsp_st = rt->rtsp_streams[i];
863 if (rtsp_st) {
0a861b6f 864 if (rtsp_st->transport_priv) {
accc248f 865 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 866 ff_rdt_parse_close(rtsp_st->transport_priv);
accc248f 867 else
0a861b6f 868 rtp_parse_close(rtsp_st->transport_priv);
accc248f 869 }
8b1ab7bf
FB
870 if (rtsp_st->rtp_handle)
871 url_close(rtsp_st->rtp_handle);
4934884a
RM
872 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
873 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 874 }
8b1ab7bf
FB
875 }
876 av_free(rt->rtsp_streams);
1a30d541
RB
877 if (rt->asf_ctx) {
878 av_close_input_stream (rt->asf_ctx);
879 rt->asf_ctx = NULL;
880 }
8b1ab7bf
FB
881}
882
ee0cb67f
RB
883static int
884rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
885{
accc248f 886 RTSPState *rt = s->priv_data;
ee0cb67f
RB
887 AVStream *st = NULL;
888
a6789dca
RB
889 /* open the RTP context */
890 if (rtsp_st->stream_index >= 0)
891 st = s->streams[rtsp_st->stream_index];
892 if (!st)
893 s->ctx_flags |= AVFMTCTX_NOHEADER;
accc248f
RB
894
895 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 896 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
accc248f
RB
897 rtsp_st->dynamic_protocol_context,
898 rtsp_st->dynamic_handler);
899 else
0a861b6f 900 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
5c918b27
RB
901 rtsp_st->sdp_payload_type,
902 &rtsp_st->rtp_payload_data);
a6789dca 903
0a861b6f 904 if (!rtsp_st->transport_priv) {
a6789dca 905 return AVERROR(ENOMEM);
accc248f 906 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
a6789dca 907 if(rtsp_st->dynamic_handler) {
0a861b6f 908 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
99a1d191
RB
909 rtsp_st->dynamic_protocol_context,
910 rtsp_st->dynamic_handler);
ee0cb67f 911 }
a6789dca 912 }
ee0cb67f
RB
913
914 return 0;
915}
916
53620bba
RB
917/**
918 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
919 */
920static int
e9dea59f 921make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 922 int lower_transport, const char *real_challenge)
1617ad97
FB
923{
924 RTSPState *rt = s->priv_data;
f830c9a4 925 int rtx, j, i, err, interleave = 0;
1617ad97 926 RTSPStream *rtsp_st;
a9e534d5 927 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 928 char cmd[2048];
e9dea59f
RB
929 const char *trans_pref;
930
119b4668 931 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
932 trans_pref = "x-pn-tng";
933 else
934 trans_pref = "RTP/AVP";
115329f1 935
1617ad97
FB
936 /* for each stream, make the setup request */
937 /* XXX: we assume the same server is used for the control of each
938 RTSP stream */
d1ccf0e0
RD
939
940 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
941 char transport[2048];
942
f830c9a4
RB
943 /**
944 * WMS serves all UDP data over a single connection, the RTX, which
945 * isn't necessarily the first in the SDP but has to be the first
946 * to be set up, else the second/third SETUP will fail with a 461.
947 */
948 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
949 rt->server_type == RTSP_SERVER_WMS) {
950 if (i == 0) {
951 /* rtx first */
952 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
953 int len = strlen(rt->rtsp_streams[rtx]->control_url);
954 if (len >= 4 &&
955 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4, "/rtx"))
956 break;
957 }
958 if (rtx == rt->nb_rtsp_streams)
959 return -1; /* no RTX found */
960 rtsp_st = rt->rtsp_streams[rtx];
961 } else
962 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
963 } else
2fea9650 964 rtsp_st = rt->rtsp_streams[i];
1617ad97 965
1617ad97 966 /* RTP/UDP */
90abbdba 967 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 968 char buf[256];
85fb7b34 969
f830c9a4
RB
970 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
971 port = reply->transports[0].client_port_min;
972 goto have_port;
973 }
974
85fb7b34 975 /* first try in specified port range */
d1ccf0e0
RD
976 if (RTSP_RTP_PORT_MIN != 0) {
977 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 978 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 979 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 980 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 981 goto rtp_opened;
d1ccf0e0 982 }
85fb7b34 983 }
1617ad97 984 }
85fb7b34 985
d1ccf0e0
RD
986/* then try on any port
987** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
988** err = AVERROR_INVALIDDATA;
989** goto fail;
990** }
991*/
85fb7b34
FB
992
993 rtp_opened:
8b1ab7bf 994 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 995 have_port:
0ad306bc 996 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
997 "%s/UDP;", trans_pref);
998 if (rt->server_type != RTSP_SERVER_REAL)
999 av_strlcat(transport, "unicast;", sizeof(transport));
1000 av_strlcatf(transport, sizeof(transport),
1001 "client_port=%d", port);
f830c9a4
RB
1002 if (rt->transport == RTSP_TRANSPORT_RTP &&
1003 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1004 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1005 }
1006
1007 /* RTP/TCP */
90abbdba 1008 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1009 /** For WMS streams, the application streams are only used for
1010 * UDP. When trying to set it up for TCP streams, the server
1011 * will return an error. Therefore, we skip those streams. */
1012 if (rt->server_type == RTSP_SERVER_WMS &&
1013 s->streams[rtsp_st->stream_index]->codec->codec_type == CODEC_TYPE_DATA)
1014 continue;
0ad306bc 1015 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1016 "%s/TCP;", trans_pref);
1017 if (rt->server_type == RTSP_SERVER_WMS)
1018 av_strlcat(transport, "unicast;", sizeof(transport));
1019 av_strlcatf(transport, sizeof(transport),
1020 "interleaved=%d-%d",
1021 interleave, interleave + 1);
1022 interleave += 2;
1617ad97
FB
1023 }
1024
90abbdba 1025 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1026 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1027 "%s/UDP;multicast", trans_pref);
1617ad97 1028 }
d1c6e47c
RB
1029 if (rt->server_type == RTSP_SERVER_REAL ||
1030 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1031 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1032 snprintf(cmd, sizeof(cmd),
b6892136
FB
1033 "SETUP %s RTSP/1.0\r\n"
1034 "Transport: %s\r\n",
1617ad97 1035 rtsp_st->control_url, transport);
2e889ae4 1036 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1037 char real_res[41], real_csum[9];
1038 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1039 real_challenge);
1040 av_strlcatf(cmd, sizeof(cmd),
1041 "If-Match: %s\r\n"
1042 "RealChallenge2: %s, sd=%s\r\n",
1043 rt->session_id, real_res, real_csum);
1044 }
1617ad97 1045 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1046 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1047 err = 1;
1048 goto fail;
7e6ca34f
RB
1049 } else if (reply->status_code != RTSP_STATUS_OK ||
1050 reply->nb_transports != 1) {
1617ad97
FB
1051 err = AVERROR_INVALIDDATA;
1052 goto fail;
1053 }
1054
1055 /* XXX: same protocol for all streams is required */
1056 if (i > 0) {
119b4668
RB
1057 if (reply->transports[0].lower_transport != rt->lower_transport ||
1058 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1059 err = AVERROR_INVALIDDATA;
1060 goto fail;
1061 }
1062 } else {
90abbdba 1063 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1064 rt->transport = reply->transports[0].transport;
1617ad97
FB
1065 }
1066
1067 /* close RTP connection if not choosen */
90abbdba
RB
1068 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1069 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1070 url_close(rtsp_st->rtp_handle);
1071 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1072 }
1073
90abbdba
RB
1074 switch(reply->transports[0].lower_transport) {
1075 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1076 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1077 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1078 break;
115329f1 1079
90abbdba 1080 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
1081 {
1082 char url[1024];
115329f1 1083
1617ad97 1084 /* XXX: also use address if specified */
115329f1 1085 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1086 host, reply->transports[0].server_port_min);
f830c9a4
RB
1087 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1088 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1089 err = AVERROR_INVALIDDATA;
1090 goto fail;
1091 }
1092 }
1093 break;
90abbdba 1094 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1095 {
1096 char url[1024];
d02678ec 1097 struct in_addr in;
1617ad97 1098
d02678ec 1099 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1100 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1101 inet_ntoa(in),
1102 reply->transports[0].port_min,
1103 reply->transports[0].ttl);
dbf30963 1104 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1105 err = AVERROR_INVALIDDATA;
1106 goto fail;
1107 }
1108 }
1109 break;
1110 }
d1ccf0e0 1111
ee0cb67f 1112 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1113 goto fail;
1617ad97
FB
1114 }
1115
2e889ae4 1116 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1117 rt->need_subscription = 1;
1118
53620bba
RB
1119 return 0;
1120
1121fail:
8a8754d8
RB
1122 for (i=0; i<rt->nb_rtsp_streams; i++) {
1123 if (rt->rtsp_streams[i]->rtp_handle) {
1124 url_close(rt->rtsp_streams[i]->rtp_handle);
1125 rt->rtsp_streams[i]->rtp_handle = NULL;
1126 }
1127 }
53620bba
RB
1128 return err;
1129}
1130
1131static int rtsp_read_header(AVFormatContext *s,
1132 AVFormatParameters *ap)
1133{
1134 RTSPState *rt = s->priv_data;
1135 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1136 URLContext *rtsp_hd;
1137 int port, ret, err;
a9e534d5 1138 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1139 unsigned char *content = NULL;
90abbdba 1140 int lower_transport_mask = 0;
1cf151e9 1141 char real_challenge[64];
53620bba
RB
1142
1143 /* extract hostname and port */
1144 url_split(NULL, 0, NULL, 0,
1145 host, sizeof(host), &port, path, sizeof(path), s->filename);
1146 if (port < 0)
1147 port = RTSP_DEFAULT_PORT;
1148
1149 /* search for options */
1150 option_list = strchr(path, '?');
1151 if (option_list) {
1152 /* remove the options from the path */
1153 *option_list++ = 0;
1154 while(option_list) {
1155 /* move the option pointer */
1156 option = option_list;
1157 option_list = strchr(option_list, '&');
1158 if (option_list)
1159 *(option_list++) = 0;
1160 /* handle the options */
1161 if (strcmp(option, "udp") == 0)
90abbdba 1162 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1163 else if (strcmp(option, "multicast") == 0)
90abbdba 1164 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1165 else if (strcmp(option, "tcp") == 0)
90abbdba 1166 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1167 }
1168 }
1169
90abbdba 1170 if (!lower_transport_mask)
2a1d51c5 1171 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba
RB
1172
1173 /* open the tcp connexion */
1174 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1175 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1176 return AVERROR(EIO);
1177 rt->rtsp_hd = rtsp_hd;
1178 rt->seq = 0;
1179
1cf151e9
RB
1180 /* request options supported by the server; this also detects server type */
1181 for (rt->server_type = RTSP_SERVER_RTP;;) {
1182 snprintf(cmd, sizeof(cmd),
1183 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1184 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1185 av_strlcat(cmd,
1186 /**
1187 * The following entries are required for proper
1188 * streaming from a Realmedia server. They are
1189 * interdependent in some way although we currently
1190 * don't quite understand how. Values were copied
1191 * from mplayer SVN r23589.
1192 * @param CompanyID is a 16-byte ID in base64
1193 * @param ClientChallenge is a 16-byte ID in hex
1194 */
1195 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1196 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1197 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1198 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1199 sizeof(cmd));
1200 rtsp_send_cmd(s, cmd, reply, NULL);
1201 if (reply->status_code != RTSP_STATUS_OK) {
1202 err = AVERROR_INVALIDDATA;
1203 goto fail;
1204 }
1205
1206 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1207 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1208 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1209 continue;
7a86bafa
RB
1210 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1211 rt->server_type = RTSP_SERVER_WMS;
2e889ae4 1212 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1213 strcpy(real_challenge, reply->real_challenge);
1214 }
1215 break;
1216 }
1217
53620bba
RB
1218 /* describe the stream */
1219 snprintf(cmd, sizeof(cmd),
1220 "DESCRIBE %s RTSP/1.0\r\n"
1221 "Accept: application/sdp\r\n",
1222 s->filename);
2e889ae4 1223 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1224 /**
1225 * The Require: attribute is needed for proper streaming from
1226 * Realmedia servers.
1227 */
1228 av_strlcat(cmd,
1229 "Require: com.real.retain-entity-for-setup\r\n",
1230 sizeof(cmd));
1231 }
53620bba
RB
1232 rtsp_send_cmd(s, cmd, reply, &content);
1233 if (!content) {
1234 err = AVERROR_INVALIDDATA;
1235 goto fail;
1236 }
1237 if (reply->status_code != RTSP_STATUS_OK) {
1238 err = AVERROR_INVALIDDATA;
1239 goto fail;
1240 }
1241
1242 /* now we got the SDP description, we parse it */
1243 ret = sdp_parse(s, (const char *)content);
1244 av_freep(&content);
1245 if (ret < 0) {
1246 err = AVERROR_INVALIDDATA;
1247 goto fail;
1248 }
1249
8a8754d8 1250 do {
90abbdba 1251 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1252
90abbdba 1253 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1254 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1255 real_challenge : NULL);
8a8754d8 1256 if (err < 0)
7e6ca34f 1257 goto fail;
90abbdba
RB
1258 lower_transport_mask &= ~(1 << lower_transport);
1259 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1260 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1261 goto fail;
1262 }
1263 } while (err);
53620bba 1264
ff762d6e
FB
1265 rt->state = RTSP_STATE_IDLE;
1266 rt->seek_timestamp = 0; /* default is to start stream at position
1267 zero */
c04c3282 1268 if (ap->initial_pause) {
ff762d6e
FB
1269 /* do not start immediately */
1270 } else {
1271 if (rtsp_read_play(s) < 0) {
1272 err = AVERROR_INVALIDDATA;
1617ad97
FB
1273 goto fail;
1274 }
1275 }
1617ad97
FB
1276 return 0;
1277 fail:
8b1ab7bf 1278 rtsp_close_streams(rt);
1617ad97
FB
1279 av_freep(&content);
1280 url_close(rt->rtsp_hd);
1281 return err;
1282}
1283
8b1ab7bf
FB
1284static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1285 uint8_t *buf, int buf_size)
1617ad97
FB
1286{
1287 RTSPState *rt = s->priv_data;
b6892136 1288 int id, len, i, ret;
1617ad97 1289 RTSPStream *rtsp_st;
1617ad97 1290
b6892136
FB
1291#ifdef DEBUG_RTP_TCP
1292 printf("tcp_read_packet:\n");
1293#endif
1617ad97
FB
1294 redo:
1295 for(;;) {
7e726132
RB
1296 RTSPMessageHeader reply;
1297
1298 ret = rtsp_read_reply(s, &reply, NULL, 1);
1299 if (ret == -1)
8b1ab7bf 1300 return -1;
7e726132 1301 if (ret == 1) /* received '$' */
1617ad97 1302 break;
7e726132 1303 /* XXX: parse message */
1617ad97 1304 }
2a42b5c3 1305 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1306 if (ret != 3)
8b1ab7bf 1307 return -1;
b6892136 1308 id = buf[0];
80fb8234 1309 len = AV_RB16(buf + 1);
b6892136
FB
1310#ifdef DEBUG_RTP_TCP
1311 printf("id=%d len=%d\n", id, len);
1312#endif
8b1ab7bf 1313 if (len > buf_size || len < 12)
1617ad97
FB
1314 goto redo;
1315 /* get the data */
2a42b5c3 1316 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1317 if (ret != len)
8b1ab7bf 1318 return -1;
985b05d3 1319 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1320 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1321 return -1;
115329f1 1322
1617ad97 1323 /* find the matching stream */
8b1ab7bf
FB
1324 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1325 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1326 if (id >= rtsp_st->interleaved_min &&
1327 id <= rtsp_st->interleaved_max)
1617ad97
FB
1328 goto found;
1329 }
1330 goto redo;
1331 found:
8b1ab7bf
FB
1332 *prtsp_st = rtsp_st;
1333 return len;
1617ad97
FB
1334}
1335
115329f1 1336static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1337 uint8_t *buf, int buf_size)
1617ad97 1338{
8b1ab7bf 1339 RTSPState *rt = s->priv_data;
1617ad97
FB
1340 RTSPStream *rtsp_st;
1341 fd_set rfds;
7e726132 1342 int fd, fd_max, n, i, ret, tcp_fd;
1617ad97
FB
1343 struct timeval tv;
1344
1345 for(;;) {
b7b8fc34 1346 if (url_interrupt_cb())
a960a1e0 1347 return AVERROR(EINTR);
1617ad97 1348 FD_ZERO(&rfds);
7e726132
RB
1349 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1350 FD_SET(tcp_fd, &rfds);
8b1ab7bf
FB
1351 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1352 rtsp_st = rt->rtsp_streams[i];
f830c9a4 1353 if (rtsp_st->rtp_handle) {
2fea9650
RB
1354 /* currently, we cannot probe RTCP handle because of
1355 * blocking restrictions */
bc8763cd
RB
1356 fd = url_get_file_handle(rtsp_st->rtp_handle);
1357 if (fd > fd_max)
1358 fd_max = fd;
1359 FD_SET(fd, &rfds);
f830c9a4 1360 }
1617ad97 1361 }
1617ad97 1362 tv.tv_sec = 0;
b7b8fc34 1363 tv.tv_usec = 100 * 1000;
1617ad97
FB
1364 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1365 if (n > 0) {
8b1ab7bf
FB
1366 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1367 rtsp_st = rt->rtsp_streams[i];
f830c9a4 1368 if (rtsp_st->rtp_handle) {
bc8763cd
RB
1369 fd = url_get_file_handle(rtsp_st->rtp_handle);
1370 if (FD_ISSET(fd, &rfds)) {
2fea9650
RB
1371 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1372 if (ret > 0) {
1373 *prtsp_st = rtsp_st;
1374 return ret;
1375 }
1617ad97
FB
1376 }
1377 }
1378 }
7e726132
RB
1379 if (FD_ISSET(tcp_fd, &rfds)) {
1380 RTSPMessageHeader reply;
1381
1382 rtsp_read_reply(s, &reply, NULL, 0);
1383 /* XXX: parse message */
1384 }
1617ad97
FB
1385 }
1386 }
1387}
1388
1389static int rtsp_read_packet(AVFormatContext *s,
1390 AVPacket *pkt)
1391{
1392 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1393 RTSPStream *rtsp_st;
1394 int ret, len;
e49906c3 1395 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
8b1ab7bf 1396
572c6a38 1397 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1398 int i;
a9e534d5 1399 RTSPMessageHeader reply1, *reply = &reply1;
572c6a38 1400 enum AVDiscard cache[MAX_STREAMS];
1256d16b
RB
1401 char cmd[1024];
1402
572c6a38
RB
1403 for (i = 0; i < s->nb_streams; i++)
1404 cache[i] = s->streams[i]->discard;
1405
1406 if (!rt->need_subscription) {
1407 if (memcmp (cache, rt->real_setup_cache,
1408 sizeof(enum AVDiscard) * s->nb_streams)) {
1409 av_strlcatf(cmd, sizeof(cmd),
1410 "SET_PARAMETER %s RTSP/1.0\r\n"
1411 "Unsubscribe: %s\r\n",
1412 s->filename, rt->last_subscription);
1413 rtsp_send_cmd(s, cmd, reply, NULL);
1414 if (reply->status_code != RTSP_STATUS_OK)
1415 return AVERROR_INVALIDDATA;
1416 rt->need_subscription = 1;
1417 }
1256d16b 1418 }
1256d16b 1419
572c6a38
RB
1420 if (rt->need_subscription) {
1421 int r, rule_nr, first = 1;
1422
1423 memcpy(rt->real_setup_cache, cache,
1424 sizeof(enum AVDiscard) * s->nb_streams);
1425 rt->last_subscription[0] = 0;
1426
1427 snprintf(cmd, sizeof(cmd),
1428 "SET_PARAMETER %s RTSP/1.0\r\n"
1429 "Subscribe: ",
1430 s->filename);
1431 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1432 rule_nr = 0;
1433 for (r = 0; r < s->nb_streams; r++) {
1434 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1435 if (s->streams[r]->discard != AVDISCARD_ALL) {
1436 if (!first)
1437 av_strlcat(rt->last_subscription, ",",
1438 sizeof(rt->last_subscription));
1439 ff_rdt_subscribe_rule(
1440 rt->last_subscription,
1441 sizeof(rt->last_subscription), i, rule_nr);
1442 first = 0;
1443 }
1444 rule_nr++;
1445 }
1446 }
1447 }
1448 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1449 rtsp_send_cmd(s, cmd, reply, NULL);
1450 if (reply->status_code != RTSP_STATUS_OK)
1451 return AVERROR_INVALIDDATA;
1452 rt->need_subscription = 0;
1453
1454 if (rt->state == RTSP_STATE_PLAYING)
1455 rtsp_read_play (s);
1456 }
1256d16b
RB
1457 }
1458
8b1ab7bf 1459 /* get next frames from the same RTP packet */
0a861b6f 1460 if (rt->cur_transport_priv) {
119b4668 1461 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 1462 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
4fce284c 1463 else
0a861b6f 1464 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
8b1ab7bf 1465 if (ret == 0) {
0a861b6f 1466 rt->cur_transport_priv = NULL;
8b1ab7bf
FB
1467 return 0;
1468 } else if (ret == 1) {
1469 return 0;
1470 } else {
0a861b6f 1471 rt->cur_transport_priv = NULL;
8b1ab7bf
FB
1472 }
1473 }
1617ad97 1474
8b1ab7bf
FB
1475 /* read next RTP packet */
1476 redo:
90abbdba 1477 switch(rt->lower_transport) {
1617ad97 1478 default:
90abbdba 1479 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1480 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1481 break;
90abbdba
RB
1482 case RTSP_LOWER_TRANSPORT_UDP:
1483 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1484 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
0a861b6f
RB
1485 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1486 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1617ad97
FB
1487 break;
1488 }
8b1ab7bf 1489 if (len < 0)
489b0d4d 1490 return len;
119b4668 1491 if (rt->transport == RTSP_TRANSPORT_RDT)
0a861b6f 1492 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
4fce284c 1493 else
0a861b6f 1494 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
8b1ab7bf
FB
1495 if (ret < 0)
1496 goto redo;
1497 if (ret == 1) {
1498 /* more packets may follow, so we save the RTP context */
0a861b6f 1499 rt->cur_transport_priv = rtsp_st->transport_priv;
8b1ab7bf
FB
1500 }
1501 return 0;
1617ad97
FB
1502}
1503
ff762d6e 1504static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1505{
ff762d6e 1506 RTSPState *rt = s->priv_data;
a9e534d5 1507 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1508 char cmd[1024];
1509
bc874dae 1510 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1511
2e889ae4 1512 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1513 if (rt->state == RTSP_STATE_PAUSED) {
1514 snprintf(cmd, sizeof(cmd),
1515 "PLAY %s RTSP/1.0\r\n",
1516 s->filename);
1517 } else {
1518 snprintf(cmd, sizeof(cmd),
1519 "PLAY %s RTSP/1.0\r\n"
1520 "Range: npt=%0.3f-\r\n",
1521 s->filename,
1522 (double)rt->seek_timestamp / AV_TIME_BASE);
1523 }
1524 rtsp_send_cmd(s, cmd, reply, NULL);
1525 if (reply->status_code != RTSP_STATUS_OK) {
1526 return -1;
1527 }
1256d16b 1528 }
5f86057f
RB
1529 rt->state = RTSP_STATE_PLAYING;
1530 return 0;
b7b8fc34
FB
1531}
1532
ff762d6e
FB
1533/* pause the stream */
1534static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1535{
ff762d6e 1536 RTSPState *rt = s->priv_data;
a9e534d5 1537 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1538 char cmd[1024];
1539
b7b8fc34 1540 rt = s->priv_data;
115329f1 1541
ff762d6e
FB
1542 if (rt->state != RTSP_STATE_PLAYING)
1543 return 0;
2e889ae4 1544 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1545 snprintf(cmd, sizeof(cmd),
1546 "PAUSE %s RTSP/1.0\r\n",
1547 s->filename);
1548 rtsp_send_cmd(s, cmd, reply, NULL);
1549 if (reply->status_code != RTSP_STATUS_OK) {
1550 return -1;
1551 }
1256d16b 1552 }
5f86057f
RB
1553 rt->state = RTSP_STATE_PAUSED;
1554 return 0;
b7b8fc34
FB
1555}
1556
115329f1 1557static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1558 int64_t timestamp, int flags)
ff762d6e
FB
1559{
1560 RTSPState *rt = s->priv_data;
115329f1 1561
50755217 1562 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1563 switch(rt->state) {
1564 default:
1565 case RTSP_STATE_IDLE:
1566 break;
1567 case RTSP_STATE_PLAYING:
1568 if (rtsp_read_play(s) != 0)
1569 return -1;
1570 break;
1571 case RTSP_STATE_PAUSED:
1572 rt->state = RTSP_STATE_IDLE;
1573 break;
1574 }
1575 return 0;
1576}
1577
1617ad97
FB
1578static int rtsp_read_close(AVFormatContext *s)
1579{
1580 RTSPState *rt = s->priv_data;
a9e534d5 1581 RTSPMessageHeader reply1, *reply = &reply1;
1617ad97
FB
1582 char cmd[1024];
1583
b6892136 1584#if 0
1617ad97 1585 /* NOTE: it is valid to flush the buffer here */
90abbdba 1586 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1587 url_fclose(&rt->rtsp_gb);
1588 }
b6892136 1589#endif
115329f1 1590 snprintf(cmd, sizeof(cmd),
b6892136 1591 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1592 s->filename);
1593 rtsp_send_cmd(s, cmd, reply, NULL);
1594
8b1ab7bf 1595 rtsp_close_streams(rt);
1617ad97
FB
1596 url_close(rt->rtsp_hd);
1597 return 0;
1598}
1599
b250f9c6 1600#if CONFIG_RTSP_DEMUXER
d2a067d1 1601AVInputFormat rtsp_demuxer = {
1617ad97 1602 "rtsp",
bde15e74 1603 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1604 sizeof(RTSPState),
1605 rtsp_probe,
1606 rtsp_read_header,
1607 rtsp_read_packet,
1608 rtsp_read_close,
ff762d6e 1609 rtsp_read_seek,
bb76a117 1610 .flags = AVFMT_NOFILE,
ff762d6e
FB
1611 .read_play = rtsp_read_play,
1612 .read_pause = rtsp_read_pause,
1617ad97 1613};
96862926 1614#endif
1617ad97 1615
cb1fdc61 1616static int sdp_probe(AVProbeData *p1)
93ced3e8 1617{
0e1ceacd 1618 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1619
1620 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1621 while (p < p_end && *p != '\0') {
f7d78f36 1622 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1623 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1624
1625 while(p < p_end - 1 && *p != '\n') p++;
1626 if (++p >= p_end)
cb1fdc61 1627 break;
cb1fdc61
FB
1628 if (*p == '\r')
1629 p++;
1630 }
93ced3e8
FB
1631 return 0;
1632}
1633
1634#define SDP_MAX_SIZE 8192
1635
1636static int sdp_read_header(AVFormatContext *s,
1637 AVFormatParameters *ap)
1638{
8b1ab7bf 1639 RTSPState *rt = s->priv_data;
93ced3e8
FB
1640 RTSPStream *rtsp_st;
1641 int size, i, err;
1642 char *content;
1643 char url[1024];
1644
1645 /* read the whole sdp file */
1646 /* XXX: better loading */
1647 content = av_malloc(SDP_MAX_SIZE);
899681cd 1648 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1649 if (size <= 0) {
1650 av_free(content);
1651 return AVERROR_INVALIDDATA;
1652 }
1653 content[size] ='\0';
1654
1655 sdp_parse(s, content);
1656 av_free(content);
1657
1658 /* open each RTP stream */
8b1ab7bf
FB
1659 for(i=0;i<rt->nb_rtsp_streams;i++) {
1660 rtsp_st = rt->rtsp_streams[i];
115329f1 1661
d2bf42be 1662 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1663 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1664 rtsp_st->sdp_port,
d2bf42be 1665 rtsp_st->sdp_port,
93ced3e8 1666 rtsp_st->sdp_ttl);
dbf30963 1667 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1668 err = AVERROR_INVALIDDATA;
1669 goto fail;
1670 }
ee0cb67f 1671 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1672 goto fail;
93ced3e8
FB
1673 }
1674 return 0;
1675 fail:
8b1ab7bf 1676 rtsp_close_streams(rt);
93ced3e8
FB
1677 return err;
1678}
1679
1680static int sdp_read_packet(AVFormatContext *s,
1681 AVPacket *pkt)
1682{
8b1ab7bf 1683 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1684}
1685
1686static int sdp_read_close(AVFormatContext *s)
1687{
8b1ab7bf
FB
1688 RTSPState *rt = s->priv_data;
1689 rtsp_close_streams(rt);
93ced3e8
FB
1690 return 0;
1691}
1692
b250f9c6 1693#if CONFIG_SDP_DEMUXER
ff70e601 1694AVInputFormat sdp_demuxer = {
93ced3e8 1695 "sdp",
bde15e74 1696 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1697 sizeof(RTSPState),
1698 sdp_probe,
1699 sdp_read_header,
1700 sdp_read_packet,
1701 sdp_read_close,
1702};
ff70e601 1703#endif
93ced3e8 1704
b250f9c6 1705#if CONFIG_REDIR_DEMUXER
1617ad97
FB
1706/* dummy redirector format (used directly in av_open_input_file now) */
1707static int redir_probe(AVProbeData *pd)
1708{
1709 const char *p;
1710 p = pd->buf;
36aa7bc2 1711 skip_spaces(&p);
f7d78f36
MR
1712 if (av_strstart(p, "http://", NULL) ||
1713 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1714 return AVPROBE_SCORE_MAX;
1715 return 0;
1716}
1717
e8acf0ed 1718static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1719{
1720 char buf[4096], *q;
1721 int c;
1722 AVFormatContext *ic = NULL;
e8acf0ed 1723 ByteIOContext *f = s->pb;
1617ad97
FB
1724
1725 /* parse each URL and try to open it */
1726 c = url_fgetc(f);
1727 while (c != URL_EOF) {
1728 /* skip spaces */
1729 for(;;) {
1730 if (!redir_isspace(c))
1731 break;
1732 c = url_fgetc(f);
1733 }
1734 if (c == URL_EOF)
1735 break;
1736 /* record url */
1737 q = buf;
1738 for(;;) {
1739 if (c == URL_EOF || redir_isspace(c))
1740 break;
1741 if ((q - buf) < sizeof(buf) - 1)
1742 *q++ = c;
1743 c = url_fgetc(f);
1744 }
1745 *q = '\0';
1746 //printf("URL='%s'\n", buf);
1747 /* try to open the media file */
1748 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1749 break;
1750 }
1617ad97 1751 if (!ic)
6f3e0b21 1752 return AVERROR(EIO);
e8acf0ed
LA
1753
1754 *s = *ic;
1755 url_fclose(f);
1756
1757 return 0;
1617ad97
FB
1758}
1759
d2a067d1 1760AVInputFormat redir_demuxer = {
1617ad97 1761 "redir",
bde15e74 1762 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1763 0,
1764 redir_probe,
e8acf0ed 1765 redir_read_header,
1617ad97
FB
1766 NULL,
1767 NULL,
1768};
e7047005 1769#endif