Create AVFormatContext objects as private transport for output RTSP sessions
[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
f9337897 25#include "libavutil/base64.h"
245976da 26#include "libavutil/avstring.h"
6a5d31ac 27#include "libavutil/intreadwrite.h"
1617ad97
FB
28#include "avformat.h"
29
db0ed93e 30#include <sys/time.h>
b250f9c6 31#if HAVE_SYS_SELECT_H
933bd8e2 32#include <sys/select.h>
6ad1c9c9 33#endif
ea452b54 34#include <strings.h>
42572ef5 35#include "network.h"
c971ff19 36#include "rtsp.h"
1617ad97 37
302879cb 38#include "rtpdec.h"
e9dea59f 39#include "rdt.h"
1a30d541 40#include "rtp_asf.h"
e6327fba 41#include "rtp_vorbis.h"
4934884a 42
1617ad97 43//#define DEBUG
b6892136 44//#define DEBUG_RTP_TCP
1617ad97 45
c482500f 46#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 47int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 48#endif
85fb7b34 49
1ef36a70 50#define SPACE_CHARS " \t\r\n"
da1e126e
RB
51/* we use memchr() instead of strchr() here because strchr() will return
52 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
53#define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
1617ad97
FB
54static void skip_spaces(const char **pp)
55{
56 const char *p;
57 p = *pp;
58 while (redir_isspace(*p))
59 p++;
60 *pp = p;
61}
62
1ef36a70
RB
63static void get_word_until_chars(char *buf, int buf_size,
64 const char *sep, const char **pp)
1617ad97
FB
65{
66 const char *p;
67 char *q;
68
69 p = *pp;
70 skip_spaces(&p);
71 q = buf;
72 while (!strchr(sep, *p) && *p != '\0') {
73 if ((q - buf) < buf_size - 1)
74 *q++ = *p;
75 p++;
76 }
77 if (buf_size > 0)
78 *q = '\0';
79 *pp = p;
80}
81
1ef36a70
RB
82static void get_word_sep(char *buf, int buf_size, const char *sep,
83 const char **pp)
1617ad97 84{
1ef36a70
RB
85 if (**pp == '/') (*pp)++;
86 get_word_until_chars(buf, buf_size, sep, pp);
87}
1617ad97 88
1ef36a70
RB
89static void get_word(char *buf, int buf_size, const char **pp)
90{
91 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
1617ad97
FB
92}
93
c8965800 94/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
8f3c87f3
RB
95static int sdp_parse_rtpmap(AVFormatContext *s,
96 AVCodecContext *codec, RTSPStream *rtsp_st,
c8965800 97 int payload_type, const char *p)
93ced3e8
FB
98{
99 char buf[256];
d1ccf0e0
RD
100 int i;
101 AVCodec *c;
7b49ce2e 102 const char *c_name;
93ced3e8 103
d1ccf0e0 104 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
9d50d396
RB
105 * see if we can handle this kind of payload.
106 * The space should normally not be there but some Real streams or
107 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
108 * have a trailing space. */
109 get_word_sep(buf, sizeof(buf), "/ ", &p);
d1ccf0e0 110 if (payload_type >= RTP_PT_PRIVATE) {
c8965800
RB
111 RTPDynamicProtocolHandler *handler;
112 for (handler = RTPFirstDynamicPayloadHandler;
113 handler; handler = handler->next) {
114 if (!strcasecmp(buf, handler->enc_name) &&
115 codec->codec_type == handler->codec_type) {
116 codec->codec_id = handler->codec_id;
117 rtsp_st->dynamic_handler = handler;
118 if (handler->open)
119 rtsp_st->dynamic_protocol_context = handler->open();
d1ccf0e0
RD
120 break;
121 }
4934884a 122 }
93ced3e8 123 } else {
c8965800
RB
124 /* We are in a standard case
125 * (from http://www.iana.org/assignments/rtp-parameters). */
d1ccf0e0 126 /* search into AVRtpPayloadTypes[] */
7ed19d7f 127 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
128 }
129
130 c = avcodec_find_decoder(codec->codec_id);
131 if (c && c->name)
7b49ce2e 132 c_name = c->name;
d1ccf0e0 133 else
170870b7 134 c_name = "(null)";
d1ccf0e0 135
7515ed0c
RB
136 get_word_sep(buf, sizeof(buf), "/", &p);
137 i = atoi(buf);
138 switch (codec->codec_type) {
139 case CODEC_TYPE_AUDIO:
140 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
141 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
142 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
143 if (i > 0) {
144 codec->sample_rate = i;
145 get_word_sep(buf, sizeof(buf), "/", &p);
146 i = atoi(buf);
147 if (i > 0)
148 codec->channels = i;
149 // TODO: there is a bug here; if it is a mono stream, and
150 // less than 22000Hz, faad upconverts to stereo and twice
151 // the frequency. No problem, but the sample rate is being
152 // set here by the sdp line. Patch on its way. (rdm)
d1ccf0e0 153 }
7515ed0c
RB
154 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
155 codec->sample_rate);
156 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
157 codec->channels);
158 break;
159 case CODEC_TYPE_VIDEO:
160 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
161 break;
162 default:
163 break;
164 }
165 return 0;
93ced3e8
FB
166}
167
c8965800 168/* return the length and optionally the data */
93ced3e8
FB
169static int hex_to_data(uint8_t *data, const char *p)
170{
171 int c, len, v;
172
173 len = 0;
174 v = 1;
c8965800 175 for (;;) {
93ced3e8 176 skip_spaces(&p);
6a8c8b36 177 if (*p == '\0')
93ced3e8 178 break;
c8965800 179 c = toupper((unsigned char) *p++);
93ced3e8
FB
180 if (c >= '0' && c <= '9')
181 c = c - '0';
182 else if (c >= 'A' && c <= 'F')
183 c = c - 'A' + 10;
184 else
185 break;
186 v = (v << 4) | c;
187 if (v & 0x100) {
188 if (data)
189 data[len] = v;
190 len++;
191 v = 1;
192 }
193 }
194 return len;
195}
196
e6327fba
RB
197static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
198 char *attr, char *value)
d1ccf0e0
RD
199{
200 switch (codec->codec_id) {
c8965800
RB
201 case CODEC_ID_MPEG4:
202 case CODEC_ID_AAC:
203 if (!strcmp(attr, "config")) {
204 /* decode the hexa encoded parameter */
205 int len = hex_to_data(NULL, value);
206 if (codec->extradata)
207 av_free(codec->extradata);
208 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
209 if (!codec->extradata)
210 return;
211 codec->extradata_size = len;
212 hex_to_data(codec->extradata, value);
213 }
214 break;
215 case CODEC_ID_VORBIS:
216 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
217 break;
218 default:
219 break;
d1ccf0e0
RD
220 }
221 return;
222}
223
644e7acb 224typedef struct {
7b49ce2e 225 const char *str;
c8965800
RB
226 uint16_t type;
227 uint32_t offset;
644e7acb 228} AttrNameMap;
d1ccf0e0
RD
229
230/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
231#define ATTR_NAME_TYPE_INT 0
232#define ATTR_NAME_TYPE_STR 1
644e7acb 233static const AttrNameMap attr_names[]=
d1ccf0e0 234{
c8965800
RB
235 { "SizeLength", ATTR_NAME_TYPE_INT,
236 offsetof(RTPPayloadData, sizelength) },
237 { "IndexLength", ATTR_NAME_TYPE_INT,
238 offsetof(RTPPayloadData, indexlength) },
239 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, indexdeltalength) },
241 { "profile-level-id", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, profile_level_id) },
243 { "StreamType", ATTR_NAME_TYPE_INT,
244 offsetof(RTPPayloadData, streamtype) },
245 { "mode", ATTR_NAME_TYPE_STR,
246 offsetof(RTPPayloadData, mode) },
247 { NULL, -1, -1 },
d1ccf0e0
RD
248};
249
c8965800
RB
250/* parse the attribute line from the fmtp a line of an sdp resonse. This
251 * is broken out as a function because it is used in rtp_h264.c, which is
252 * forthcoming. */
253int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
254 char *value, int value_size)
d0deedcb
RM
255{
256 skip_spaces(p);
c8965800 257 if (**p) {
d0deedcb
RM
258 get_word_sep(attr, attr_size, "=", p);
259 if (**p == '=')
260 (*p)++;
261 get_word_sep(value, value_size, ";", p);
262 if (**p == ';')
263 (*p)++;
264 return 1;
265 }
266 return 0;
267}
268
d1ccf0e0
RD
269/* parse a SDP line and save stream attributes */
270static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
271{
272 char attr[256];
373afbaf
RB
273 /* Vorbis setup headers can be up to 12KB and are sent base64
274 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
275 char value[16384];
d1ccf0e0 276 int i;
d1ccf0e0 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 */
c8965800
RB
282 while (rtsp_next_attr_and_value(&p, attr, sizeof(attr),
283 value, sizeof(value))) {
284 /* grab the codec extra_data from the config parameter of the fmtp
285 * line */
e6327fba
RB
286 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
287 attr, value);
d1ccf0e0
RD
288 /* Looking for a known attribute */
289 for (i = 0; attr_names[i].str; ++i) {
290 if (!strcasecmp(attr, attr_names[i].str)) {
c8965800
RB
291 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
292 *(int *)((char *)rtp_payload_data +
293 attr_names[i].offset) = atoi(value);
294 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
295 *(char **)((char *)rtp_payload_data +
296 attr_names[i].offset) = av_strdup(value);
bb270c08 297 }
93ced3e8 298 }
93ced3e8
FB
299 }
300}
301
debe86bf 302/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
31693e00
RM
303 * and end time.
304 * Used for seeking in the rtp stream.
305 */
306static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
307{
308 char buf[256];
309
310 skip_spaces(&p);
f7d78f36 311 if (!av_stristart(p, "npt=", &p))
31693e00
RM
312 return;
313
314 *start = AV_NOPTS_VALUE;
315 *end = AV_NOPTS_VALUE;
316
317 get_word_sep(buf, sizeof(buf), "-", &p);
318 *start = parse_date(buf, 1);
319 if (*p == '-') {
320 p++;
321 get_word_sep(buf, sizeof(buf), "-", &p);
322 *end = parse_date(buf, 1);
323 }
324// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
325// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
326}
327
93ced3e8
FB
328typedef struct SDPParseState {
329 /* SDP only */
330 struct in_addr default_ip;
c8965800
RB
331 int default_ttl;
332 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
333} SDPParseState;
334
335static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
336 int letter, const char *buf)
337{
8b1ab7bf 338 RTSPState *rt = s->priv_data;
1617ad97
FB
339 char buf1[64], st_type[64];
340 const char *p;
fb65d2ca
DP
341 enum CodecType codec_type;
342 int payload_type, i;
1617ad97
FB
343 AVStream *st;
344 RTSPStream *rtsp_st;
93ced3e8
FB
345 struct in_addr sdp_ip;
346 int ttl;
347
67c9cd69 348 dprintf(s, "sdp: %c='%s'\n", letter, buf);
1617ad97
FB
349
350 p = buf;
cb760a47
RB
351 if (s1->skip_media && letter != 'm')
352 return;
c8965800 353 switch (letter) {
93ced3e8
FB
354 case 'c':
355 get_word(buf1, sizeof(buf1), &p);
356 if (strcmp(buf1, "IN") != 0)
357 return;
358 get_word(buf1, sizeof(buf1), &p);
359 if (strcmp(buf1, "IP4") != 0)
360 return;
361 get_word_sep(buf1, sizeof(buf1), "/", &p);
362 if (inet_aton(buf1, &sdp_ip) == 0)
363 return;
364 ttl = 16;
365 if (*p == '/') {
366 p++;
367 get_word_sep(buf1, sizeof(buf1), "/", &p);
368 ttl = atoi(buf1);
369 }
370 if (s->nb_streams == 0) {
371 s1->default_ip = sdp_ip;
372 s1->default_ttl = ttl;
373 } else {
374 st = s->streams[s->nb_streams - 1];
375 rtsp_st = st->priv_data;
376 rtsp_st->sdp_ip = sdp_ip;
377 rtsp_st->sdp_ttl = ttl;
378 }
379 break;
1617ad97 380 case 's':
da61e413 381 av_metadata_set(&s->metadata, "title", p);
1617ad97
FB
382 break;
383 case 'i':
384 if (s->nb_streams == 0) {
da61e413 385 av_metadata_set(&s->metadata, "comment", p);
1617ad97
FB
386 break;
387 }
388 break;
389 case 'm':
390 /* new stream */
cb760a47 391 s1->skip_media = 0;
1617ad97
FB
392 get_word(st_type, sizeof(st_type), &p);
393 if (!strcmp(st_type, "audio")) {
394 codec_type = CODEC_TYPE_AUDIO;
395 } else if (!strcmp(st_type, "video")) {
396 codec_type = CODEC_TYPE_VIDEO;
090438cc
RB
397 } else if (!strcmp(st_type, "application")) {
398 codec_type = CODEC_TYPE_DATA;
1617ad97 399 } else {
cb760a47 400 s1->skip_media = 1;
1617ad97
FB
401 return;
402 }
1617ad97
FB
403 rtsp_st = av_mallocz(sizeof(RTSPStream));
404 if (!rtsp_st)
405 return;
8b1ab7bf
FB
406 rtsp_st->stream_index = -1;
407 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
408
409 rtsp_st->sdp_ip = s1->default_ip;
410 rtsp_st->sdp_ttl = s1->default_ttl;
411
93ced3e8
FB
412 get_word(buf1, sizeof(buf1), &p); /* port */
413 rtsp_st->sdp_port = atoi(buf1);
414
415 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 416
93ced3e8
FB
417 /* XXX: handle list of formats */
418 get_word(buf1, sizeof(buf1), &p); /* format list */
419 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 420
7ed19d7f 421 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
422 /* no corresponding stream */
423 } else {
424 st = av_new_stream(s, 0);
425 if (!st)
426 return;
427 st->priv_data = rtsp_st;
428 rtsp_st->stream_index = st->index;
01f4895c 429 st->codec->codec_type = codec_type;
d1ccf0e0 430 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 431 /* if standard payload type, we can find the codec right now */
bf6d9818 432 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
433 }
434 }
1617ad97 435 /* put a default control url */
00eb13e0 436 av_strlcpy(rtsp_st->control_url, rt->control_uri,
c8965800 437 sizeof(rtsp_st->control_url));
1617ad97
FB
438 break;
439 case 'a':
00eb13e0
AS
440 if (av_strstart(p, "control:", &p)) {
441 if (s->nb_streams == 0) {
442 if (!strncmp(p, "rtsp://", 7))
443 av_strlcpy(rt->control_uri, p,
444 sizeof(rt->control_uri));
445 } else {
1617ad97
FB
446 char proto[32];
447 /* get the control url */
448 st = s->streams[s->nb_streams - 1];
449 rtsp_st = st->priv_data;
115329f1 450
1617ad97 451 /* XXX: may need to add full url resolution */
c8965800
RB
452 url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
453 NULL, NULL, 0, p);
1617ad97
FB
454 if (proto[0] == '\0') {
455 /* relative control URL */
00eb13e0 456 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
c8965800
RB
457 av_strlcat(rtsp_st->control_url, "/",
458 sizeof(rtsp_st->control_url));
459 av_strlcat(rtsp_st->control_url, p,
460 sizeof(rtsp_st->control_url));
461 } else
462 av_strlcpy(rtsp_st->control_url, p,
463 sizeof(rtsp_st->control_url));
00eb13e0 464 }
83d14c85 465 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 466 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 467 get_word(buf1, sizeof(buf1), &p);
93ced3e8 468 payload_type = atoi(buf1);
83d14c85 469 st = s->streams[s->nb_streams - 1];
ff16f551 470 rtsp_st = st->priv_data;
8f3c87f3 471 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
f7d78f36 472 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 473 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 474 get_word(buf1, sizeof(buf1), &p);
93ced3e8 475 payload_type = atoi(buf1);
c8965800
RB
476 for (i = 0; i < s->nb_streams; i++) {
477 st = s->streams[i];
93ced3e8
FB
478 rtsp_st = st->priv_data;
479 if (rtsp_st->sdp_payload_type == payload_type) {
c8965800
RB
480 if (!(rtsp_st->dynamic_handler &&
481 rtsp_st->dynamic_handler->parse_sdp_a_line &&
482 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
483 i, rtsp_st->dynamic_protocol_context, buf)))
ed787542 484 sdp_parse_fmtp(st, p);
93ced3e8
FB
485 }
486 }
c8965800 487 } else if (av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
488 // let dynamic protocol handlers have a stab at the line.
489 get_word(buf1, sizeof(buf1), &p);
490 payload_type = atoi(buf1);
c8965800
RB
491 for (i = 0; i < s->nb_streams; i++) {
492 st = s->streams[i];
d0deedcb 493 rtsp_st = st->priv_data;
c8965800
RB
494 if (rtsp_st->sdp_payload_type == payload_type &&
495 rtsp_st->dynamic_handler &&
496 rtsp_st->dynamic_handler->parse_sdp_a_line)
497 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
498 rtsp_st->dynamic_protocol_context, buf);
d0deedcb 499 }
c8965800 500 } else if (av_strstart(p, "range:", &p)) {
31693e00
RM
501 int64_t start, end;
502
503 // this is so that seeking on a streamed file can work.
504 rtsp_parse_range_npt(p, &start, &end);
c8965800
RB
505 s->start_time = start;
506 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
507 s->duration = (end == AV_NOPTS_VALUE) ?
508 AV_NOPTS_VALUE : end - start;
119b4668
RB
509 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
510 if (atoi(p) == 1)
511 rt->transport = RTSP_TRANSPORT_RDT;
1a30d541
RB
512 } else {
513 if (rt->server_type == RTSP_SERVER_WMS)
514 ff_wms_parse_sdp_a_line(s, p);
515 if (s->nb_streams > 0) {
c4a3d032
RB
516 if (rt->server_type == RTSP_SERVER_REAL)
517 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
518
519 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
520 if (rtsp_st->dynamic_handler &&
521 rtsp_st->dynamic_handler->parse_sdp_a_line)
c8965800
RB
522 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
523 s->nb_streams - 1,
c4a3d032 524 rtsp_st->dynamic_protocol_context, buf);
1a30d541 525 }
1617ad97
FB
526 }
527 break;
528 }
529}
530
5c91a675 531static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
532{
533 const char *p;
534 int letter;
9211bcdd
RB
535 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
536 * contain long SDP lines containing complete ASF Headers (several
537 * kB) or arrays of MDPR (RM stream descriptor) headers plus
538 * "rulebooks" describing their properties. Therefore, the SDP line
373afbaf
RB
539 * buffer is large.
540 *
541 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
542 char buf[16384], *q;
93ced3e8 543 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 544
93ced3e8 545 memset(s1, 0, sizeof(SDPParseState));
1617ad97 546 p = content;
c8965800 547 for (;;) {
1617ad97
FB
548 skip_spaces(&p);
549 letter = *p;
550 if (letter == '\0')
551 break;
552 p++;
553 if (*p != '=')
554 goto next_line;
555 p++;
556 /* get the content */
557 q = buf;
b6892136 558 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
559 if ((q - buf) < sizeof(buf) - 1)
560 *q++ = *p;
561 p++;
562 }
563 *q = '\0';
93ced3e8 564 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
565 next_line:
566 while (*p != '\n' && *p != '\0')
567 p++;
568 if (*p == '\n')
569 p++;
570 }
571 return 0;
572}
573
1ced9da3 574/* close and free RTSP streams */
52aa4338 575static void rtsp_close_streams(AVFormatContext *s)
1ced9da3 576{
52aa4338 577 RTSPState *rt = s->priv_data;
1ced9da3
LA
578 int i;
579 RTSPStream *rtsp_st;
580
c8965800 581 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1ced9da3
LA
582 rtsp_st = rt->rtsp_streams[i];
583 if (rtsp_st) {
584 if (rtsp_st->transport_priv) {
fd450a51
MS
585 if (s->oformat) {
586 AVFormatContext *rtpctx = rtsp_st->transport_priv;
587 av_write_trailer(rtpctx);
588 url_fclose(rtpctx->pb);
589 av_free(rtpctx->streams[0]);
590 av_free(rtpctx);
591 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
592 ff_rdt_parse_close(rtsp_st->transport_priv);
593 else
594 rtp_parse_close(rtsp_st->transport_priv);
595 }
596 if (rtsp_st->rtp_handle)
597 url_close(rtsp_st->rtp_handle);
598 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
599 rtsp_st->dynamic_handler->close(
600 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
601 }
602 }
603 av_free(rt->rtsp_streams);
604 if (rt->asf_ctx) {
605 av_close_input_stream (rt->asf_ctx);
606 rt->asf_ctx = NULL;
607 }
608 av_freep(&rt->auth_b64);
609}
610
fd450a51
MS
611static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st, URLContext *handle) {
612 AVFormatContext *rtpctx;
613 int ret;
614 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
615
616 if (!rtp_format)
617 return NULL;
618
619 /* Allocate an AVFormatContext for each output stream */
620 rtpctx = avformat_alloc_context();
621 if (!rtpctx)
622 return NULL;
623
624 rtpctx->oformat = rtp_format;
625 if (!av_new_stream(rtpctx, 0)) {
626 av_free(rtpctx);
627 return NULL;
628 }
629 /* Copy the max delay setting; the rtp muxer reads this. */
630 rtpctx->max_delay = s->max_delay;
631 /* Copy other stream parameters. */
632 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
633
634 /* Remove the local codec, link to the original codec
635 * context instead, to give the rtp muxer access to
636 * codec parameters. */
637 av_free(rtpctx->streams[0]->codec);
638 rtpctx->streams[0]->codec = st->codec;
639
640 url_fdopen(&rtpctx->pb, handle);
641 ret = av_write_header(rtpctx);
642
643 if (ret) {
644 url_fclose(rtpctx->pb);
645 av_free(rtpctx->streams[0]);
646 av_free(rtpctx);
647 return NULL;
648 }
649
650 /* Copy the RTP AVStream timebase back to the original AVStream */
651 st->time_base = rtpctx->streams[0]->time_base;
652 return rtpctx;
653}
654
c8965800 655static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
656{
657 RTSPState *rt = s->priv_data;
658 AVStream *st = NULL;
659
660 /* open the RTP context */
661 if (rtsp_st->stream_index >= 0)
662 st = s->streams[rtsp_st->stream_index];
663 if (!st)
664 s->ctx_flags |= AVFMTCTX_NOHEADER;
665
fd450a51
MS
666 if (s->oformat) {
667 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
668 /* Ownage of rtp_handle is passed to the rtp mux context */
669 rtsp_st->rtp_handle = NULL;
670 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
671 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
672 rtsp_st->dynamic_protocol_context,
673 rtsp_st->dynamic_handler);
674 else
675 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
676 rtsp_st->sdp_payload_type,
677 &rtsp_st->rtp_payload_data);
678
679 if (!rtsp_st->transport_priv) {
680 return AVERROR(ENOMEM);
681 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 682 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
683 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
684 rtsp_st->dynamic_protocol_context,
685 rtsp_st->dynamic_handler);
686 }
687 }
688
689 return 0;
690}
691
103dfbe2 692#if CONFIG_RTSP_DEMUXER
1ced9da3
LA
693static int rtsp_probe(AVProbeData *p)
694{
695 if (av_strstart(p->filename, "rtsp:", NULL))
696 return AVPROBE_SCORE_MAX;
697 return 0;
698}
699
1617ad97
FB
700static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
701{
702 const char *p;
703 int v;
704
705 p = *pp;
706 skip_spaces(&p);
707 v = strtol(p, (char **)&p, 10);
708 if (*p == '-') {
709 p++;
710 *min_ptr = v;
711 v = strtol(p, (char **)&p, 10);
712 *max_ptr = v;
713 } else {
714 *min_ptr = v;
715 *max_ptr = v;
716 }
717 *pp = p;
718}
719
720/* XXX: only one transport specification is parsed */
a9e534d5 721static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
722{
723 char transport_protocol[16];
724 char profile[16];
725 char lower_transport[16];
726 char parameter[16];
727 RTSPTransportField *th;
728 char buf[256];
115329f1 729
1617ad97 730 reply->nb_transports = 0;
115329f1 731
c8965800 732 for (;;) {
1617ad97
FB
733 skip_spaces(&p);
734 if (*p == '\0')
735 break;
736
737 th = &reply->transports[reply->nb_transports];
738
115329f1 739 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 740 "/", &p);
e1502118 741 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
742 get_word_sep(profile, sizeof(profile), "/;,", &p);
743 lower_transport[0] = '\0';
744 /* rtp/avp/<protocol> */
745 if (*p == '/') {
7ecc634e
LB
746 get_word_sep(lower_transport, sizeof(lower_transport),
747 ";,", &p);
119b4668
RB
748 }
749 th->transport = RTSP_TRANSPORT_RTP;
750 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
751 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 752 /* x-pn-tng/<protocol> */
e1502118
LB
753 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
754 profile[0] = '\0';
119b4668 755 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 756 }
b6892136 757 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 758 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 759 else
90abbdba 760 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 761
1617ad97
FB
762 if (*p == ';')
763 p++;
764 /* get each parameter */
765 while (*p != '\0' && *p != ',') {
766 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
767 if (!strcmp(parameter, "port")) {
768 if (*p == '=') {
769 p++;
770 rtsp_parse_range(&th->port_min, &th->port_max, &p);
771 }
772 } else if (!strcmp(parameter, "client_port")) {
773 if (*p == '=') {
774 p++;
115329f1 775 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
776 &th->client_port_max, &p);
777 }
778 } else if (!strcmp(parameter, "server_port")) {
779 if (*p == '=') {
780 p++;
115329f1 781 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
782 &th->server_port_max, &p);
783 }
784 } else if (!strcmp(parameter, "interleaved")) {
785 if (*p == '=') {
786 p++;
115329f1 787 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
788 &th->interleaved_max, &p);
789 }
790 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
791 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
792 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
793 } else if (!strcmp(parameter, "ttl")) {
794 if (*p == '=') {
795 p++;
796 th->ttl = strtol(p, (char **)&p, 10);
797 }
798 } else if (!strcmp(parameter, "destination")) {
799 struct in_addr ipaddr;
800
801 if (*p == '=') {
802 p++;
803 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 804 if (inet_aton(buf, &ipaddr))
1617ad97
FB
805 th->destination = ntohl(ipaddr.s_addr);
806 }
807 }
808 while (*p != ';' && *p != '\0' && *p != ',')
809 p++;
810 if (*p == ';')
811 p++;
812 }
813 if (*p == ',')
814 p++;
815
816 reply->nb_transports++;
817 }
818}
819
a9e534d5 820void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
821{
822 const char *p;
823
824 /* NOTE: we do case independent match for broken servers */
825 p = buf;
f7d78f36 826 if (av_stristart(p, "Session:", &p)) {
30e79845 827 int t;
1617ad97 828 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
829 if (av_stristart(p, ";timeout=", &p) &&
830 (t = strtol(p, NULL, 10)) > 0) {
831 reply->timeout = t;
832 }
f7d78f36 833 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 834 reply->content_length = strtol(p, NULL, 10);
f7d78f36 835 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 836 rtsp_parse_transport(reply, p);
f7d78f36 837 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 838 reply->seq = strtol(p, NULL, 10);
f7d78f36 839 } else if (av_stristart(p, "Range:", &p)) {
31693e00 840 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
841 } else if (av_stristart(p, "RealChallenge1:", &p)) {
842 skip_spaces(&p);
843 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
844 } else if (av_stristart(p, "Server:", &p)) {
845 skip_spaces(&p);
846 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
847 } else if (av_stristart(p, "Notice:", &p) ||
848 av_stristart(p, "X-Notice:", &p)) {
849 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
850 } else if (av_stristart(p, "Location:", &p)) {
851 skip_spaces(&p);
852 av_strlcpy(reply->location, p , sizeof(reply->location));
1617ad97
FB
853 }
854}
855
b7b8fc34
FB
856/* skip a RTP/TCP interleaved packet */
857static void rtsp_skip_packet(AVFormatContext *s)
858{
859 RTSPState *rt = s->priv_data;
860 int ret, len, len1;
861 uint8_t buf[1024];
862
0e848977 863 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
864 if (ret != 3)
865 return;
80fb8234 866 len = AV_RB16(buf + 1);
67c9cd69
BC
867
868 dprintf(s, "skipping RTP packet len=%d\n", len);
869
b7b8fc34
FB
870 /* skip payload */
871 while (len > 0) {
872 len1 = len;
873 if (len1 > sizeof(buf))
874 len1 = sizeof(buf);
0e848977 875 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
876 if (ret != len1)
877 return;
878 len -= len1;
879 }
880}
1617ad97 881
7e726132
RB
882/**
883 * Read a RTSP message from the server, or prepare to read data
884 * packets if we're reading data interleaved over the TCP/RTSP
885 * connection as well.
886 *
887 * @param s RTSP demuxer context
888 * @param reply pointer where the RTSP message header will be stored
889 * @param content_ptr pointer where the RTSP message body, if any, will
702d0a9e 890 * be stored (length is in reply)
7e726132
RB
891 * @param return_on_interleaved_data whether the function may return if we
892 * encounter a data marker ('$'), which precedes data
893 * packets over interleaved TCP/RTSP connections. If this
894 * is set, this function will return 1 after encountering
895 * a '$'. If it is not set, the function will skip any
896 * data packets (if they are encountered), until a reply
897 * has been fully parsed. If no more data is available
898 * without parsing a reply, it will return an error.
899 *
900 * @returns 1 if a data packets is ready to be received, -1 on error,
901 * and 0 on success.
902 */
c8965800
RB
903static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
904 unsigned char **content_ptr,
905 int return_on_interleaved_data)
1617ad97
FB
906{
907 RTSPState *rt = s->priv_data;
908 char buf[4096], buf1[1024], *q;
909 unsigned char ch;
910 const char *p;
7e726132 911 int ret, content_length, line_count = 0;
1617ad97
FB
912 unsigned char *content = NULL;
913
d541a7d2 914 memset(reply, 0, sizeof(*reply));
1617ad97 915
1617ad97 916 /* parse reply (XXX: use buffers) */
1617ad97 917 rt->last_reply[0] = '\0';
c8965800 918 for (;;) {
1617ad97 919 q = buf;
c8965800 920 for (;;) {
0e848977 921 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 922#ifdef DEBUG_RTP_TCP
67c9cd69 923 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
924#endif
925 if (ret != 1)
926 return -1;
1617ad97
FB
927 if (ch == '\n')
928 break;
b7b8fc34
FB
929 if (ch == '$') {
930 /* XXX: only parse it if first char on line ? */
7e726132
RB
931 if (return_on_interleaved_data) {
932 return 1;
933 } else
b7b8fc34
FB
934 rtsp_skip_packet(s);
935 } else if (ch != '\r') {
1617ad97
FB
936 if ((q - buf) < sizeof(buf) - 1)
937 *q++ = ch;
938 }
939 }
940 *q = '\0';
67c9cd69
BC
941
942 dprintf(s, "line='%s'\n", buf);
943
1617ad97
FB
944 /* test if last line */
945 if (buf[0] == '\0')
946 break;
947 p = buf;
948 if (line_count == 0) {
949 /* get reply code */
950 get_word(buf1, sizeof(buf1), &p);
951 get_word(buf1, sizeof(buf1), &p);
952 reply->status_code = atoi(buf1);
953 } else {
954 rtsp_parse_line(reply, p);
75e61b0e
MR
955 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
956 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
957 }
958 line_count++;
959 }
115329f1 960
1617ad97 961 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 962 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 963
1617ad97
FB
964 content_length = reply->content_length;
965 if (content_length > 0) {
966 /* leave some room for a trailing '\0' (useful for simple parsing) */
967 content = av_malloc(content_length + 1);
0e848977 968 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
969 content[content_length] = '\0';
970 }
971 if (content_ptr)
972 *content_ptr = content;
e2e2e7dd
AB
973 else
974 av_free(content);
7e726132 975
fccb1770
RB
976 /* EOS */
977 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
978 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 979 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 980 rt->state = RTSP_STATE_IDLE;
c8965800 981 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 982 return AVERROR(EIO); /* data or server error */
c8965800 983 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
984 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
985 return AVERROR(EPERM);
986
7e726132 987 return 0;
1617ad97
FB
988}
989
dfd017bf
MS
990static void rtsp_send_cmd_with_content_async(AVFormatContext *s,
991 const char *cmd,
992 const unsigned char *send_content,
993 int send_content_length)
29b9f58b
RB
994{
995 RTSPState *rt = s->priv_data;
996 char buf[4096], buf1[1024];
997
998 rt->seq++;
999 av_strlcpy(buf, cmd, sizeof(buf));
1000 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1001 av_strlcat(buf, buf1, sizeof(buf));
1002 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
1003 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
1004 av_strlcat(buf, buf1, sizeof(buf));
1005 }
f9337897
RB
1006 if (rt->auth_b64)
1007 av_strlcatf(buf, sizeof(buf),
ba93ea6d
RB
1008 "Authorization: Basic %s\r\n",
1009 rt->auth_b64);
dfd017bf
MS
1010 if (send_content_length > 0 && send_content)
1011 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 1012 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
1013
1014 dprintf(s, "Sending:\n%s--\n", buf);
1015
29b9f58b 1016 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
1017 if (send_content_length > 0 && send_content)
1018 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
1019 rt->last_cmd_time = av_gettime();
1020}
1021
dfd017bf
MS
1022static void rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
1023{
1024 rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
1025}
1026
c8965800
RB
1027static void rtsp_send_cmd(AVFormatContext *s,
1028 const char *cmd, RTSPMessageHeader *reply,
1029 unsigned char **content_ptr)
30e79845 1030{
2e13ecfe 1031 rtsp_send_cmd_async(s, cmd);
29b9f58b 1032
7e726132 1033 rtsp_read_reply(s, reply, content_ptr, 0);
29b9f58b
RB
1034}
1035
dfd017bf
MS
1036static void rtsp_send_cmd_with_content(AVFormatContext *s,
1037 const char *cmd,
1038 RTSPMessageHeader *reply,
1039 unsigned char **content_ptr,
1040 const unsigned char *send_content,
1041 int send_content_length)
1042{
1043 rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
1044
1045 rtsp_read_reply(s, reply, content_ptr, 0);
1046}
1047
53620bba
RB
1048/**
1049 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1050 */
c8965800
RB
1051static int make_setup_request(AVFormatContext *s, const char *host, int port,
1052 int lower_transport, const char *real_challenge)
1617ad97
FB
1053{
1054 RTSPState *rt = s->priv_data;
f830c9a4 1055 int rtx, j, i, err, interleave = 0;
1617ad97 1056 RTSPStream *rtsp_st;
a9e534d5 1057 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1058 char cmd[2048];
e9dea59f
RB
1059 const char *trans_pref;
1060
119b4668 1061 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1062 trans_pref = "x-pn-tng";
1063 else
1064 trans_pref = "RTP/AVP";
115329f1 1065
30e79845
RB
1066 /* default timeout: 1 minute */
1067 rt->timeout = 60;
1068
1617ad97
FB
1069 /* for each stream, make the setup request */
1070 /* XXX: we assume the same server is used for the control of each
c8965800 1071 * RTSP stream */
d1ccf0e0 1072
c8965800 1073 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1074 char transport[2048];
1075
f830c9a4
RB
1076 /**
1077 * WMS serves all UDP data over a single connection, the RTX, which
1078 * isn't necessarily the first in the SDP but has to be the first
1079 * to be set up, else the second/third SETUP will fail with a 461.
1080 */
1081 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1082 rt->server_type == RTSP_SERVER_WMS) {
1083 if (i == 0) {
1084 /* rtx first */
1085 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1086 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1087 if (len >= 4 &&
c8965800
RB
1088 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1089 "/rtx"))
f830c9a4
RB
1090 break;
1091 }
1092 if (rtx == rt->nb_rtsp_streams)
1093 return -1; /* no RTX found */
1094 rtsp_st = rt->rtsp_streams[rtx];
1095 } else
1096 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1097 } else
2fea9650 1098 rtsp_st = rt->rtsp_streams[i];
1617ad97 1099
1617ad97 1100 /* RTP/UDP */
90abbdba 1101 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1102 char buf[256];
85fb7b34 1103
f830c9a4
RB
1104 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1105 port = reply->transports[0].client_port_min;
1106 goto have_port;
1107 }
1108
85fb7b34 1109 /* first try in specified port range */
d1ccf0e0 1110 if (RTSP_RTP_PORT_MIN != 0) {
c8965800
RB
1111 while (j <= RTSP_RTP_PORT_MAX) {
1112 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1113 host, j);
1114 /* we will use two ports per rtp stream (rtp and rtcp) */
1115 j += 2;
1116 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1117 goto rtp_opened;
1118 }
1617ad97 1119 }
85fb7b34 1120
c8965800
RB
1121#if 0
1122 /* then try on any port */
1123 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1124 err = AVERROR_INVALIDDATA;
1125 goto fail;
1126 }
1127#endif
85fb7b34
FB
1128
1129 rtp_opened:
8b1ab7bf 1130 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1131 have_port:
0ad306bc 1132 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1133 "%s/UDP;", trans_pref);
1134 if (rt->server_type != RTSP_SERVER_REAL)
1135 av_strlcat(transport, "unicast;", sizeof(transport));
1136 av_strlcatf(transport, sizeof(transport),
1137 "client_port=%d", port);
f830c9a4
RB
1138 if (rt->transport == RTSP_TRANSPORT_RTP &&
1139 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1140 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1141 }
1142
1143 /* RTP/TCP */
90abbdba 1144 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1145 /** For WMS streams, the application streams are only used for
1146 * UDP. When trying to set it up for TCP streams, the server
1147 * will return an error. Therefore, we skip those streams. */
1148 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1149 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1150 CODEC_TYPE_DATA)
090438cc 1151 continue;
0ad306bc 1152 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1153 "%s/TCP;", trans_pref);
1154 if (rt->server_type == RTSP_SERVER_WMS)
1155 av_strlcat(transport, "unicast;", sizeof(transport));
1156 av_strlcatf(transport, sizeof(transport),
1157 "interleaved=%d-%d",
1158 interleave, interleave + 1);
1159 interleave += 2;
1617ad97
FB
1160 }
1161
90abbdba 1162 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1163 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1164 "%s/UDP;multicast", trans_pref);
1617ad97 1165 }
69adcc4f
MS
1166 if (s->oformat) {
1167 av_strlcat(transport, ";mode=receive", sizeof(transport));
1168 } else if (rt->server_type == RTSP_SERVER_REAL ||
d1c6e47c 1169 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1170 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1171 snprintf(cmd, sizeof(cmd),
b6892136
FB
1172 "SETUP %s RTSP/1.0\r\n"
1173 "Transport: %s\r\n",
1617ad97 1174 rtsp_st->control_url, transport);
2e889ae4 1175 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1176 char real_res[41], real_csum[9];
1177 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1178 real_challenge);
1179 av_strlcatf(cmd, sizeof(cmd),
1180 "If-Match: %s\r\n"
1181 "RealChallenge2: %s, sd=%s\r\n",
1182 rt->session_id, real_res, real_csum);
1183 }
1617ad97 1184 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1185 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1186 err = 1;
1187 goto fail;
7e6ca34f
RB
1188 } else if (reply->status_code != RTSP_STATUS_OK ||
1189 reply->nb_transports != 1) {
1617ad97
FB
1190 err = AVERROR_INVALIDDATA;
1191 goto fail;
1192 }
1193
1194 /* XXX: same protocol for all streams is required */
1195 if (i > 0) {
119b4668
RB
1196 if (reply->transports[0].lower_transport != rt->lower_transport ||
1197 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1198 err = AVERROR_INVALIDDATA;
1199 goto fail;
1200 }
1201 } else {
90abbdba 1202 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1203 rt->transport = reply->transports[0].transport;
1617ad97
FB
1204 }
1205
1206 /* close RTP connection if not choosen */
90abbdba
RB
1207 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1208 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1209 url_close(rtsp_st->rtp_handle);
1210 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1211 }
1212
90abbdba
RB
1213 switch(reply->transports[0].lower_transport) {
1214 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1215 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1216 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1217 break;
115329f1 1218
c8965800
RB
1219 case RTSP_LOWER_TRANSPORT_UDP: {
1220 char url[1024];
1221
1222 /* XXX: also use address if specified */
1223 snprintf(url, sizeof(url), "rtp://%s:%d",
1224 host, reply->transports[0].server_port_min);
1225 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1226 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1227 err = AVERROR_INVALIDDATA;
1228 goto fail;
1617ad97 1229 }
9c8fa20d
MS
1230 /* Try to initialize the connection state in a
1231 * potential NAT router by sending dummy packets.
1232 * RTP/RTCP dummy packets are used for RDT, too.
1233 */
30ff7c5c 1234 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1235 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1236 break;
c8965800
RB
1237 }
1238 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1239 char url[1024];
1240 struct in_addr in;
1241 int port, ttl;
1242
1243 if (reply->transports[0].destination) {
1244 in.s_addr = htonl(reply->transports[0].destination);
1245 port = reply->transports[0].port_min;
1246 ttl = reply->transports[0].ttl;
1247 } else {
1248 in = rtsp_st->sdp_ip;
1249 port = rtsp_st->sdp_port;
1250 ttl = rtsp_st->sdp_ttl;
1251 }
1252 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1253 inet_ntoa(in), port, ttl);
1254 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1255 err = AVERROR_INVALIDDATA;
1256 goto fail;
1617ad97
FB
1257 }
1258 break;
1259 }
c8965800 1260 }
d1ccf0e0 1261
ee0cb67f 1262 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1263 goto fail;
1617ad97
FB
1264 }
1265
30e79845
RB
1266 if (reply->timeout > 0)
1267 rt->timeout = reply->timeout;
1268
2e889ae4 1269 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1270 rt->need_subscription = 1;
1271
53620bba
RB
1272 return 0;
1273
1274fail:
c8965800 1275 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1276 if (rt->rtsp_streams[i]->rtp_handle) {
1277 url_close(rt->rtsp_streams[i]->rtp_handle);
1278 rt->rtsp_streams[i]->rtp_handle = NULL;
1279 }
1280 }
53620bba
RB
1281 return err;
1282}
1283
1ced9da3
LA
1284static int rtsp_read_play(AVFormatContext *s)
1285{
1286 RTSPState *rt = s->priv_data;
1287 RTSPMessageHeader reply1, *reply = &reply1;
1288 char cmd[1024];
1289
1290 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1291
1292 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1293 if (rt->state == RTSP_STATE_PAUSED) {
1294 snprintf(cmd, sizeof(cmd),
1295 "PLAY %s RTSP/1.0\r\n",
00eb13e0 1296 rt->control_uri);
1ced9da3
LA
1297 } else {
1298 snprintf(cmd, sizeof(cmd),
1299 "PLAY %s RTSP/1.0\r\n"
1300 "Range: npt=%0.3f-\r\n",
00eb13e0 1301 rt->control_uri,
1ced9da3
LA
1302 (double)rt->seek_timestamp / AV_TIME_BASE);
1303 }
1304 rtsp_send_cmd(s, cmd, reply, NULL);
1305 if (reply->status_code != RTSP_STATUS_OK) {
1306 return -1;
1307 }
1308 }
c02fd3d2 1309 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1310 return 0;
1311}
1312
e23d195d
MS
1313static int rtsp_setup_input_streams(AVFormatContext *s)
1314{
1315 RTSPState *rt = s->priv_data;
1316 RTSPMessageHeader reply1, *reply = &reply1;
1317 char cmd[1024];
1318 unsigned char *content = NULL;
1319 int ret;
1320
1321 /* describe the stream */
1322 snprintf(cmd, sizeof(cmd),
1323 "DESCRIBE %s RTSP/1.0\r\n"
1324 "Accept: application/sdp\r\n",
1325 s->filename);
1326 if (rt->server_type == RTSP_SERVER_REAL) {
1327 /**
1328 * The Require: attribute is needed for proper streaming from
1329 * Realmedia servers.
1330 */
1331 av_strlcat(cmd,
1332 "Require: com.real.retain-entity-for-setup\r\n",
1333 sizeof(cmd));
1334 }
1335 rtsp_send_cmd(s, cmd, reply, &content);
1336 if (!content)
1337 return AVERROR_INVALIDDATA;
1338 if (reply->status_code != RTSP_STATUS_OK) {
1339 av_freep(&content);
1340 return AVERROR_INVALIDDATA;
1341 }
1342
1343 /* now we got the SDP description, we parse it */
1344 ret = sdp_parse(s, (const char *)content);
1345 av_freep(&content);
1346 if (ret < 0)
1347 return AVERROR_INVALIDDATA;
1348
1349 return 0;
1350}
1351
4280f9bb 1352static int rtsp_connect(AVFormatContext *s)
53620bba
RB
1353{
1354 RTSPState *rt = s->priv_data;
921da217
LB
1355 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1356 char *option_list, *option, *filename;
53620bba 1357 URLContext *rtsp_hd;
e23d195d 1358 int port, err;
a9e534d5 1359 RTSPMessageHeader reply1, *reply = &reply1;
90abbdba 1360 int lower_transport_mask = 0;
1cf151e9 1361 char real_challenge[64];
c8965800 1362redirect:
53620bba 1363 /* extract hostname and port */
f9337897 1364 url_split(NULL, 0, auth, sizeof(auth),
53620bba 1365 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897
RB
1366 if (*auth) {
1367 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1368
1369 if (!(rt->auth_b64 = av_malloc(b64_len)))
1370 return AVERROR(ENOMEM);
1371 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1372 err = AVERROR(EINVAL);
1373 goto fail;
1374 }
1375 }
53620bba
RB
1376 if (port < 0)
1377 port = RTSP_DEFAULT_PORT;
1378
1379 /* search for options */
1380 option_list = strchr(path, '?');
1381 if (option_list) {
921da217 1382 filename = strchr(s->filename, '?');
c8965800 1383 while (option_list) {
53620bba 1384 /* move the option pointer */
921da217 1385 option = ++option_list;
53620bba
RB
1386 option_list = strchr(option_list, '&');
1387 if (option_list)
921da217
LB
1388 *option_list = 0;
1389
53620bba 1390 /* handle the options */
c8965800 1391 if (!strcmp(option, "udp")) {
90abbdba 1392 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1393 } else if (!strcmp(option, "multicast")) {
90abbdba 1394 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1395 } else if (!strcmp(option, "tcp")) {
90abbdba 1396 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1397 } else {
921da217
LB
1398 strcpy(++filename, option);
1399 filename += strlen(option);
1400 if (option_list) *filename = '&';
1401 }
53620bba 1402 }
921da217 1403 *filename = 0;
53620bba
RB
1404 }
1405
90abbdba 1406 if (!lower_transport_mask)
2a1d51c5 1407 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba
RB
1408
1409 /* open the tcp connexion */
1410 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
f9337897
RB
1411 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1412 err = AVERROR(EIO);
1413 goto fail;
1414 }
53620bba
RB
1415 rt->rtsp_hd = rtsp_hd;
1416 rt->seq = 0;
1417
c8965800
RB
1418 /* request options supported by the server; this also detects server
1419 * type */
00eb13e0
AS
1420 av_strlcpy(rt->control_uri, s->filename,
1421 sizeof(rt->control_uri));
1cf151e9
RB
1422 for (rt->server_type = RTSP_SERVER_RTP;;) {
1423 snprintf(cmd, sizeof(cmd),
1424 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1425 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1426 av_strlcat(cmd,
1427 /**
1428 * The following entries are required for proper
1429 * streaming from a Realmedia server. They are
1430 * interdependent in some way although we currently
1431 * don't quite understand how. Values were copied
1432 * from mplayer SVN r23589.
1433 * @param CompanyID is a 16-byte ID in base64
1434 * @param ClientChallenge is a 16-byte ID in hex
1435 */
1436 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1437 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1438 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1439 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1440 sizeof(cmd));
1441 rtsp_send_cmd(s, cmd, reply, NULL);
1442 if (reply->status_code != RTSP_STATUS_OK) {
1443 err = AVERROR_INVALIDDATA;
1444 goto fail;
1445 }
1446
1447 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1448 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1449 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1450 continue;
7a86bafa
RB
1451 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1452 rt->server_type = RTSP_SERVER_WMS;
c8965800 1453 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1454 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1455 break;
1456 }
1457
e23d195d
MS
1458 err = rtsp_setup_input_streams(s);
1459 if (err)
53620bba 1460 goto fail;
53620bba 1461
8a8754d8 1462 do {
c8965800
RB
1463 int lower_transport = ff_log2_tab[lower_transport_mask &
1464 ~(lower_transport_mask - 1)];
8a8754d8 1465
90abbdba 1466 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1467 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1468 real_challenge : NULL);
8a8754d8 1469 if (err < 0)
7e6ca34f 1470 goto fail;
90abbdba
RB
1471 lower_transport_mask &= ~(1 << lower_transport);
1472 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1473 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1474 goto fail;
1475 }
1476 } while (err);
53620bba 1477
ff762d6e 1478 rt->state = RTSP_STATE_IDLE;
c8965800 1479 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1480 return 0;
1481 fail:
52aa4338 1482 rtsp_close_streams(s);
1617ad97 1483 url_close(rt->rtsp_hd);
d243ba30
LB
1484 if (reply->status_code >=300 && reply->status_code < 400) {
1485 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1486 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1487 reply->status_code,
1488 s->filename);
1489 goto redirect;
1490 }
1617ad97
FB
1491 return err;
1492}
1493
4280f9bb
MS
1494static int rtsp_read_header(AVFormatContext *s,
1495 AVFormatParameters *ap)
1496{
1497 RTSPState *rt = s->priv_data;
1498 int ret;
1499
1500 ret = rtsp_connect(s);
1501 if (ret)
1502 return ret;
1503
1504 if (ap->initial_pause) {
1505 /* do not start immediately */
1506 } else {
1507 if (rtsp_read_play(s) < 0) {
1508 rtsp_close_streams(s);
1509 url_close(rt->rtsp_hd);
1510 return AVERROR_INVALIDDATA;
1511 }
1512 }
1513
1514 return 0;
1515}
1516
0e59034e
RB
1517static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1518 uint8_t *buf, int buf_size)
1519{
1520 RTSPState *rt = s->priv_data;
1521 RTSPStream *rtsp_st;
1522 fd_set rfds;
1523 int fd, fd_max, n, i, ret, tcp_fd;
1524 struct timeval tv;
1525
c8965800 1526 for (;;) {
0e59034e
RB
1527 if (url_interrupt_cb())
1528 return AVERROR(EINTR);
1529 FD_ZERO(&rfds);
1530 if (rt->rtsp_hd) {
1531 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1532 FD_SET(tcp_fd, &rfds);
1533 } else {
1534 fd_max = 0;
1535 tcp_fd = -1;
1536 }
c8965800 1537 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1538 rtsp_st = rt->rtsp_streams[i];
1539 if (rtsp_st->rtp_handle) {
1540 /* currently, we cannot probe RTCP handle because of
1541 * blocking restrictions */
1542 fd = url_get_file_handle(rtsp_st->rtp_handle);
1543 if (fd > fd_max)
1544 fd_max = fd;
1545 FD_SET(fd, &rfds);
1546 }
1547 }
1548 tv.tv_sec = 0;
1549 tv.tv_usec = 100 * 1000;
1550 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1551 if (n > 0) {
c8965800 1552 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1553 rtsp_st = rt->rtsp_streams[i];
1554 if (rtsp_st->rtp_handle) {
1555 fd = url_get_file_handle(rtsp_st->rtp_handle);
1556 if (FD_ISSET(fd, &rfds)) {
1557 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1558 if (ret > 0) {
1559 *prtsp_st = rtsp_st;
1560 return ret;
1561 }
1562 }
1563 }
1564 }
1565#if CONFIG_RTSP_DEMUXER
27000636 1566 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1567 RTSPMessageHeader reply;
1568
1569 rtsp_read_reply(s, &reply, NULL, 0);
1570 /* XXX: parse message */
c02fd3d2 1571 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1572 return 0;
1573 }
1574#endif
1575 }
1576 }
1577}
1578
8b1ab7bf
FB
1579static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1580 uint8_t *buf, int buf_size)
1617ad97
FB
1581{
1582 RTSPState *rt = s->priv_data;
b6892136 1583 int id, len, i, ret;
1617ad97 1584 RTSPStream *rtsp_st;
1617ad97 1585
b6892136 1586#ifdef DEBUG_RTP_TCP
67c9cd69 1587 dprintf(s, "tcp_read_packet:\n");
b6892136 1588#endif
c8965800
RB
1589redo:
1590 for (;;) {
7e726132
RB
1591 RTSPMessageHeader reply;
1592
1593 ret = rtsp_read_reply(s, &reply, NULL, 1);
1594 if (ret == -1)
8b1ab7bf 1595 return -1;
7e726132 1596 if (ret == 1) /* received '$' */
1617ad97 1597 break;
7e726132 1598 /* XXX: parse message */
c02fd3d2 1599 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1600 return 0;
1617ad97 1601 }
0e848977 1602 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1603 if (ret != 3)
8b1ab7bf 1604 return -1;
c8965800 1605 id = buf[0];
80fb8234 1606 len = AV_RB16(buf + 1);
b6892136 1607#ifdef DEBUG_RTP_TCP
67c9cd69 1608 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1609#endif
8b1ab7bf 1610 if (len > buf_size || len < 12)
1617ad97
FB
1611 goto redo;
1612 /* get the data */
0e848977 1613 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1614 if (ret != len)
8b1ab7bf 1615 return -1;
985b05d3 1616 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1617 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1618 return -1;
115329f1 1619
1617ad97 1620 /* find the matching stream */
c8965800 1621 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1622 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1623 if (id >= rtsp_st->interleaved_min &&
1624 id <= rtsp_st->interleaved_max)
1617ad97
FB
1625 goto found;
1626 }
1627 goto redo;
c8965800 1628found:
8b1ab7bf
FB
1629 *prtsp_st = rtsp_st;
1630 return len;
1617ad97
FB
1631}
1632
0e59034e
RB
1633static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1634{
1635 RTSPState *rt = s->priv_data;
1636 int ret, len;
1637 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1638 RTSPStream *rtsp_st;
1639
1640 /* get next frames from the same RTP packet */
1641 if (rt->cur_transport_priv) {
c8965800 1642 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1643 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1644 } else
0e59034e
RB
1645 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1646 if (ret == 0) {
1647 rt->cur_transport_priv = NULL;
1648 return 0;
1649 } else if (ret == 1) {
1650 return 0;
c8965800 1651 } else
0e59034e 1652 rt->cur_transport_priv = NULL;
0e59034e
RB
1653 }
1654
1655 /* read next RTP packet */
1656 redo:
1657 switch(rt->lower_transport) {
1658 default:
1659#if CONFIG_RTSP_DEMUXER
1660 case RTSP_LOWER_TRANSPORT_TCP:
1661 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1662 break;
1663#endif
1664 case RTSP_LOWER_TRANSPORT_UDP:
1665 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1666 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1667 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1668 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1669 break;
1670 }
1671 if (len < 0)
1672 return len;
1673 if (len == 0)
1674 return AVERROR_EOF;
c8965800 1675 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1676 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1677 } else
0e59034e
RB
1678 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1679 if (ret < 0)
1680 goto redo;
c8965800 1681 if (ret == 1)
0e59034e
RB
1682 /* more packets may follow, so we save the RTP context */
1683 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1684
1685 return ret;
1686}
1687
c8965800 1688static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1689{
1690 RTSPState *rt = s->priv_data;
98713182 1691 int ret;
30e79845
RB
1692 RTSPMessageHeader reply1, *reply = &reply1;
1693 char cmd[1024];
8b1ab7bf 1694
572c6a38 1695 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1696 int i;
572c6a38 1697 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1698
572c6a38
RB
1699 for (i = 0; i < s->nb_streams; i++)
1700 cache[i] = s->streams[i]->discard;
1701
1702 if (!rt->need_subscription) {
1703 if (memcmp (cache, rt->real_setup_cache,
1704 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1705 snprintf(cmd, sizeof(cmd),
7eaa646f
RB
1706 "SET_PARAMETER %s RTSP/1.0\r\n"
1707 "Unsubscribe: %s\r\n",
00eb13e0 1708 rt->control_uri, rt->last_subscription);
572c6a38
RB
1709 rtsp_send_cmd(s, cmd, reply, NULL);
1710 if (reply->status_code != RTSP_STATUS_OK)
1711 return AVERROR_INVALIDDATA;
1712 rt->need_subscription = 1;
1713 }
1256d16b 1714 }
1256d16b 1715
572c6a38
RB
1716 if (rt->need_subscription) {
1717 int r, rule_nr, first = 1;
1718
1719 memcpy(rt->real_setup_cache, cache,
1720 sizeof(enum AVDiscard) * s->nb_streams);
1721 rt->last_subscription[0] = 0;
1722
1723 snprintf(cmd, sizeof(cmd),
1724 "SET_PARAMETER %s RTSP/1.0\r\n"
1725 "Subscribe: ",
00eb13e0 1726 rt->control_uri);
572c6a38
RB
1727 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1728 rule_nr = 0;
1729 for (r = 0; r < s->nb_streams; r++) {
1730 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1731 if (s->streams[r]->discard != AVDISCARD_ALL) {
1732 if (!first)
1733 av_strlcat(rt->last_subscription, ",",
1734 sizeof(rt->last_subscription));
1735 ff_rdt_subscribe_rule(
1736 rt->last_subscription,
1737 sizeof(rt->last_subscription), i, rule_nr);
1738 first = 0;
1739 }
1740 rule_nr++;
1741 }
1742 }
1743 }
1744 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1745 rtsp_send_cmd(s, cmd, reply, NULL);
1746 if (reply->status_code != RTSP_STATUS_OK)
1747 return AVERROR_INVALIDDATA;
1748 rt->need_subscription = 0;
1749
c02fd3d2 1750 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1751 rtsp_read_play (s);
1752 }
1256d16b
RB
1753 }
1754
d7250724 1755 ret = rtsp_fetch_packet(s, pkt);
c8965800 1756 if (ret < 0)
98713182 1757 return ret;
30e79845
RB
1758
1759 /* send dummy request to keep TCP connection alive */
1760 if ((rt->server_type == RTSP_SERVER_WMS ||
1761 rt->server_type == RTSP_SERVER_REAL) &&
1762 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1763 if (rt->server_type == RTSP_SERVER_WMS) {
1764 snprintf(cmd, sizeof(cmd) - 1,
1765 "GET_PARAMETER %s RTSP/1.0\r\n",
00eb13e0 1766 rt->control_uri);
2e13ecfe 1767 rtsp_send_cmd_async(s, cmd);
30e79845 1768 } else {
2e13ecfe 1769 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
30e79845
RB
1770 }
1771 }
1772
8b1ab7bf 1773 return 0;
1617ad97
FB
1774}
1775
ff762d6e
FB
1776/* pause the stream */
1777static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1778{
ff762d6e 1779 RTSPState *rt = s->priv_data;
a9e534d5 1780 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1781 char cmd[1024];
1782
b7b8fc34 1783 rt = s->priv_data;
115329f1 1784
c02fd3d2 1785 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1786 return 0;
2e889ae4 1787 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1788 snprintf(cmd, sizeof(cmd),
1789 "PAUSE %s RTSP/1.0\r\n",
00eb13e0 1790 rt->control_uri);
99b2ac07
RB
1791 rtsp_send_cmd(s, cmd, reply, NULL);
1792 if (reply->status_code != RTSP_STATUS_OK) {
1793 return -1;
1794 }
1256d16b 1795 }
5f86057f
RB
1796 rt->state = RTSP_STATE_PAUSED;
1797 return 0;
b7b8fc34
FB
1798}
1799
115329f1 1800static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1801 int64_t timestamp, int flags)
ff762d6e
FB
1802{
1803 RTSPState *rt = s->priv_data;
115329f1 1804
c8965800
RB
1805 rt->seek_timestamp = av_rescale_q(timestamp,
1806 s->streams[stream_index]->time_base,
1807 AV_TIME_BASE_Q);
ff762d6e
FB
1808 switch(rt->state) {
1809 default:
1810 case RTSP_STATE_IDLE:
1811 break;
c02fd3d2 1812 case RTSP_STATE_STREAMING:
ec606b36
LB
1813 if (rtsp_read_pause(s) != 0)
1814 return -1;
1815 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1816 if (rtsp_read_play(s) != 0)
1817 return -1;
1818 break;
1819 case RTSP_STATE_PAUSED:
1820 rt->state = RTSP_STATE_IDLE;
1821 break;
1822 }
1823 return 0;
1824}
1825
1617ad97
FB
1826static int rtsp_read_close(AVFormatContext *s)
1827{
1828 RTSPState *rt = s->priv_data;
1617ad97
FB
1829 char cmd[1024];
1830
b6892136 1831#if 0
1617ad97 1832 /* NOTE: it is valid to flush the buffer here */
90abbdba 1833 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1834 url_fclose(&rt->rtsp_gb);
1835 }
b6892136 1836#endif
115329f1 1837 snprintf(cmd, sizeof(cmd),
b6892136 1838 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97 1839 s->filename);
2e13ecfe 1840 rtsp_send_cmd_async(s, cmd);
1617ad97 1841
52aa4338 1842 rtsp_close_streams(s);
1617ad97
FB
1843 url_close(rt->rtsp_hd);
1844 return 0;
1845}
1846
d2a067d1 1847AVInputFormat rtsp_demuxer = {
1617ad97 1848 "rtsp",
bde15e74 1849 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1850 sizeof(RTSPState),
1851 rtsp_probe,
1852 rtsp_read_header,
1853 rtsp_read_packet,
1854 rtsp_read_close,
ff762d6e 1855 rtsp_read_seek,
bb76a117 1856 .flags = AVFMT_NOFILE,
ff762d6e
FB
1857 .read_play = rtsp_read_play,
1858 .read_pause = rtsp_read_pause,
1617ad97 1859};
96862926 1860#endif
1617ad97 1861
cb1fdc61 1862static int sdp_probe(AVProbeData *p1)
93ced3e8 1863{
0e1ceacd 1864 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1865
1866 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1867 while (p < p_end && *p != '\0') {
c8965800
RB
1868 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1869 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1870 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1871
c8965800 1872 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1873 if (++p >= p_end)
cb1fdc61 1874 break;
cb1fdc61
FB
1875 if (*p == '\r')
1876 p++;
1877 }
93ced3e8
FB
1878 return 0;
1879}
1880
1881#define SDP_MAX_SIZE 8192
1882
c8965800 1883static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1884{
8b1ab7bf 1885 RTSPState *rt = s->priv_data;
93ced3e8
FB
1886 RTSPStream *rtsp_st;
1887 int size, i, err;
1888 char *content;
1889 char url[1024];
1890
1891 /* read the whole sdp file */
1892 /* XXX: better loading */
1893 content = av_malloc(SDP_MAX_SIZE);
899681cd 1894 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1895 if (size <= 0) {
1896 av_free(content);
1897 return AVERROR_INVALIDDATA;
1898 }
1899 content[size] ='\0';
1900
1901 sdp_parse(s, content);
1902 av_free(content);
1903
1904 /* open each RTP stream */
c8965800 1905 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1906 rtsp_st = rt->rtsp_streams[i];
115329f1 1907
d2bf42be 1908 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1909 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1910 rtsp_st->sdp_port,
d2bf42be 1911 rtsp_st->sdp_port,
93ced3e8 1912 rtsp_st->sdp_ttl);
dbf30963 1913 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1914 err = AVERROR_INVALIDDATA;
1915 goto fail;
1916 }
ee0cb67f 1917 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1918 goto fail;
93ced3e8
FB
1919 }
1920 return 0;
c8965800 1921fail:
52aa4338 1922 rtsp_close_streams(s);
93ced3e8
FB
1923 return err;
1924}
1925
93ced3e8
FB
1926static int sdp_read_close(AVFormatContext *s)
1927{
52aa4338 1928 rtsp_close_streams(s);
93ced3e8
FB
1929 return 0;
1930}
1931
ff70e601 1932AVInputFormat sdp_demuxer = {
93ced3e8 1933 "sdp",
bde15e74 1934 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1935 sizeof(RTSPState),
1936 sdp_probe,
1937 sdp_read_header,
d7250724 1938 rtsp_fetch_packet,
93ced3e8
FB
1939 sdp_read_close,
1940};