Make Bink decoder able to skip alpha plane
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
406792e7 3 * Copyright (c) 2002 Fabrice Bellard
1617ad97 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
1617ad97
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
7246177d
AJ
22/* needed by inet_aton() */
23#define _SVID_SOURCE
24
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 {
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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) {
585 if (rt->transport == RTSP_TRANSPORT_RDT)
586 ff_rdt_parse_close(rtsp_st->transport_priv);
587 else
588 rtp_parse_close(rtsp_st->transport_priv);
589 }
590 if (rtsp_st->rtp_handle)
591 url_close(rtsp_st->rtp_handle);
592 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
593 rtsp_st->dynamic_handler->close(
594 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
595 }
596 }
597 av_free(rt->rtsp_streams);
598 if (rt->asf_ctx) {
599 av_close_input_stream (rt->asf_ctx);
600 rt->asf_ctx = NULL;
601 }
602 av_freep(&rt->auth_b64);
603}
604
c8965800 605static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
606{
607 RTSPState *rt = s->priv_data;
608 AVStream *st = NULL;
609
610 /* open the RTP context */
611 if (rtsp_st->stream_index >= 0)
612 st = s->streams[rtsp_st->stream_index];
613 if (!st)
614 s->ctx_flags |= AVFMTCTX_NOHEADER;
615
616 if (rt->transport == RTSP_TRANSPORT_RDT)
617 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
618 rtsp_st->dynamic_protocol_context,
619 rtsp_st->dynamic_handler);
620 else
621 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
622 rtsp_st->sdp_payload_type,
623 &rtsp_st->rtp_payload_data);
624
625 if (!rtsp_st->transport_priv) {
626 return AVERROR(ENOMEM);
627 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 628 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
629 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
630 rtsp_st->dynamic_protocol_context,
631 rtsp_st->dynamic_handler);
632 }
633 }
634
635 return 0;
636}
637
103dfbe2 638#if CONFIG_RTSP_DEMUXER
1ced9da3
LA
639static int rtsp_probe(AVProbeData *p)
640{
641 if (av_strstart(p->filename, "rtsp:", NULL))
642 return AVPROBE_SCORE_MAX;
643 return 0;
644}
645
1617ad97
FB
646static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
647{
648 const char *p;
649 int v;
650
651 p = *pp;
652 skip_spaces(&p);
653 v = strtol(p, (char **)&p, 10);
654 if (*p == '-') {
655 p++;
656 *min_ptr = v;
657 v = strtol(p, (char **)&p, 10);
658 *max_ptr = v;
659 } else {
660 *min_ptr = v;
661 *max_ptr = v;
662 }
663 *pp = p;
664}
665
666/* XXX: only one transport specification is parsed */
a9e534d5 667static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
668{
669 char transport_protocol[16];
670 char profile[16];
671 char lower_transport[16];
672 char parameter[16];
673 RTSPTransportField *th;
674 char buf[256];
115329f1 675
1617ad97 676 reply->nb_transports = 0;
115329f1 677
c8965800 678 for (;;) {
1617ad97
FB
679 skip_spaces(&p);
680 if (*p == '\0')
681 break;
682
683 th = &reply->transports[reply->nb_transports];
684
115329f1 685 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 686 "/", &p);
e1502118 687 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
688 get_word_sep(profile, sizeof(profile), "/;,", &p);
689 lower_transport[0] = '\0';
690 /* rtp/avp/<protocol> */
691 if (*p == '/') {
7ecc634e
LB
692 get_word_sep(lower_transport, sizeof(lower_transport),
693 ";,", &p);
119b4668
RB
694 }
695 th->transport = RTSP_TRANSPORT_RTP;
696 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
697 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 698 /* x-pn-tng/<protocol> */
e1502118
LB
699 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
700 profile[0] = '\0';
119b4668 701 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 702 }
b6892136 703 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 704 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 705 else
90abbdba 706 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 707
1617ad97
FB
708 if (*p == ';')
709 p++;
710 /* get each parameter */
711 while (*p != '\0' && *p != ',') {
712 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
713 if (!strcmp(parameter, "port")) {
714 if (*p == '=') {
715 p++;
716 rtsp_parse_range(&th->port_min, &th->port_max, &p);
717 }
718 } else if (!strcmp(parameter, "client_port")) {
719 if (*p == '=') {
720 p++;
115329f1 721 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
722 &th->client_port_max, &p);
723 }
724 } else if (!strcmp(parameter, "server_port")) {
725 if (*p == '=') {
726 p++;
115329f1 727 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
728 &th->server_port_max, &p);
729 }
730 } else if (!strcmp(parameter, "interleaved")) {
731 if (*p == '=') {
732 p++;
115329f1 733 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
734 &th->interleaved_max, &p);
735 }
736 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
737 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
738 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
739 } else if (!strcmp(parameter, "ttl")) {
740 if (*p == '=') {
741 p++;
742 th->ttl = strtol(p, (char **)&p, 10);
743 }
744 } else if (!strcmp(parameter, "destination")) {
745 struct in_addr ipaddr;
746
747 if (*p == '=') {
748 p++;
749 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 750 if (inet_aton(buf, &ipaddr))
1617ad97
FB
751 th->destination = ntohl(ipaddr.s_addr);
752 }
753 }
754 while (*p != ';' && *p != '\0' && *p != ',')
755 p++;
756 if (*p == ';')
757 p++;
758 }
759 if (*p == ',')
760 p++;
761
762 reply->nb_transports++;
763 }
764}
765
a9e534d5 766void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
767{
768 const char *p;
769
770 /* NOTE: we do case independent match for broken servers */
771 p = buf;
f7d78f36 772 if (av_stristart(p, "Session:", &p)) {
30e79845 773 int t;
1617ad97 774 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
775 if (av_stristart(p, ";timeout=", &p) &&
776 (t = strtol(p, NULL, 10)) > 0) {
777 reply->timeout = t;
778 }
f7d78f36 779 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 780 reply->content_length = strtol(p, NULL, 10);
f7d78f36 781 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 782 rtsp_parse_transport(reply, p);
f7d78f36 783 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 784 reply->seq = strtol(p, NULL, 10);
f7d78f36 785 } else if (av_stristart(p, "Range:", &p)) {
31693e00 786 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
787 } else if (av_stristart(p, "RealChallenge1:", &p)) {
788 skip_spaces(&p);
789 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
790 } else if (av_stristart(p, "Server:", &p)) {
791 skip_spaces(&p);
792 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
793 } else if (av_stristart(p, "Notice:", &p) ||
794 av_stristart(p, "X-Notice:", &p)) {
795 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
796 } else if (av_stristart(p, "Location:", &p)) {
797 skip_spaces(&p);
798 av_strlcpy(reply->location, p , sizeof(reply->location));
1617ad97
FB
799 }
800}
801
b7b8fc34
FB
802/* skip a RTP/TCP interleaved packet */
803static void rtsp_skip_packet(AVFormatContext *s)
804{
805 RTSPState *rt = s->priv_data;
806 int ret, len, len1;
807 uint8_t buf[1024];
808
0e848977 809 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
810 if (ret != 3)
811 return;
80fb8234 812 len = AV_RB16(buf + 1);
67c9cd69
BC
813
814 dprintf(s, "skipping RTP packet len=%d\n", len);
815
b7b8fc34
FB
816 /* skip payload */
817 while (len > 0) {
818 len1 = len;
819 if (len1 > sizeof(buf))
820 len1 = sizeof(buf);
0e848977 821 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
822 if (ret != len1)
823 return;
824 len -= len1;
825 }
826}
1617ad97 827
7e726132
RB
828/**
829 * Read a RTSP message from the server, or prepare to read data
830 * packets if we're reading data interleaved over the TCP/RTSP
831 * connection as well.
832 *
833 * @param s RTSP demuxer context
834 * @param reply pointer where the RTSP message header will be stored
835 * @param content_ptr pointer where the RTSP message body, if any, will
702d0a9e 836 * be stored (length is in reply)
7e726132
RB
837 * @param return_on_interleaved_data whether the function may return if we
838 * encounter a data marker ('$'), which precedes data
839 * packets over interleaved TCP/RTSP connections. If this
840 * is set, this function will return 1 after encountering
841 * a '$'. If it is not set, the function will skip any
842 * data packets (if they are encountered), until a reply
843 * has been fully parsed. If no more data is available
844 * without parsing a reply, it will return an error.
845 *
846 * @returns 1 if a data packets is ready to be received, -1 on error,
847 * and 0 on success.
848 */
c8965800
RB
849static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
850 unsigned char **content_ptr,
851 int return_on_interleaved_data)
1617ad97
FB
852{
853 RTSPState *rt = s->priv_data;
854 char buf[4096], buf1[1024], *q;
855 unsigned char ch;
856 const char *p;
7e726132 857 int ret, content_length, line_count = 0;
1617ad97
FB
858 unsigned char *content = NULL;
859
d541a7d2 860 memset(reply, 0, sizeof(*reply));
1617ad97 861
1617ad97 862 /* parse reply (XXX: use buffers) */
1617ad97 863 rt->last_reply[0] = '\0';
c8965800 864 for (;;) {
1617ad97 865 q = buf;
c8965800 866 for (;;) {
0e848977 867 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 868#ifdef DEBUG_RTP_TCP
67c9cd69 869 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
870#endif
871 if (ret != 1)
872 return -1;
1617ad97
FB
873 if (ch == '\n')
874 break;
b7b8fc34
FB
875 if (ch == '$') {
876 /* XXX: only parse it if first char on line ? */
7e726132
RB
877 if (return_on_interleaved_data) {
878 return 1;
879 } else
b7b8fc34
FB
880 rtsp_skip_packet(s);
881 } else if (ch != '\r') {
1617ad97
FB
882 if ((q - buf) < sizeof(buf) - 1)
883 *q++ = ch;
884 }
885 }
886 *q = '\0';
67c9cd69
BC
887
888 dprintf(s, "line='%s'\n", buf);
889
1617ad97
FB
890 /* test if last line */
891 if (buf[0] == '\0')
892 break;
893 p = buf;
894 if (line_count == 0) {
895 /* get reply code */
896 get_word(buf1, sizeof(buf1), &p);
897 get_word(buf1, sizeof(buf1), &p);
898 reply->status_code = atoi(buf1);
899 } else {
900 rtsp_parse_line(reply, p);
75e61b0e
MR
901 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
902 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
903 }
904 line_count++;
905 }
115329f1 906
1617ad97 907 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 908 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 909
1617ad97
FB
910 content_length = reply->content_length;
911 if (content_length > 0) {
912 /* leave some room for a trailing '\0' (useful for simple parsing) */
913 content = av_malloc(content_length + 1);
0e848977 914 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
915 content[content_length] = '\0';
916 }
917 if (content_ptr)
918 *content_ptr = content;
e2e2e7dd
AB
919 else
920 av_free(content);
7e726132 921
fccb1770
RB
922 /* EOS */
923 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
924 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 925 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 926 rt->state = RTSP_STATE_IDLE;
c8965800 927 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 928 return AVERROR(EIO); /* data or server error */
c8965800 929 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
930 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
931 return AVERROR(EPERM);
932
7e726132 933 return 0;
1617ad97
FB
934}
935
dfd017bf
MS
936static void rtsp_send_cmd_with_content_async(AVFormatContext *s,
937 const char *cmd,
938 const unsigned char *send_content,
939 int send_content_length)
29b9f58b
RB
940{
941 RTSPState *rt = s->priv_data;
942 char buf[4096], buf1[1024];
943
944 rt->seq++;
945 av_strlcpy(buf, cmd, sizeof(buf));
946 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
947 av_strlcat(buf, buf1, sizeof(buf));
948 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
949 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
950 av_strlcat(buf, buf1, sizeof(buf));
951 }
f9337897
RB
952 if (rt->auth_b64)
953 av_strlcatf(buf, sizeof(buf),
ba93ea6d
RB
954 "Authorization: Basic %s\r\n",
955 rt->auth_b64);
dfd017bf
MS
956 if (send_content_length > 0 && send_content)
957 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 958 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
959
960 dprintf(s, "Sending:\n%s--\n", buf);
961
29b9f58b 962 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
963 if (send_content_length > 0 && send_content)
964 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
965 rt->last_cmd_time = av_gettime();
966}
967
dfd017bf
MS
968static void rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
969{
970 rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
971}
972
c8965800
RB
973static void rtsp_send_cmd(AVFormatContext *s,
974 const char *cmd, RTSPMessageHeader *reply,
975 unsigned char **content_ptr)
30e79845 976{
2e13ecfe 977 rtsp_send_cmd_async(s, cmd);
29b9f58b 978
7e726132 979 rtsp_read_reply(s, reply, content_ptr, 0);
29b9f58b
RB
980}
981
dfd017bf
MS
982static void rtsp_send_cmd_with_content(AVFormatContext *s,
983 const char *cmd,
984 RTSPMessageHeader *reply,
985 unsigned char **content_ptr,
986 const unsigned char *send_content,
987 int send_content_length)
988{
989 rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
990
991 rtsp_read_reply(s, reply, content_ptr, 0);
992}
993
53620bba
RB
994/**
995 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
996 */
c8965800
RB
997static int make_setup_request(AVFormatContext *s, const char *host, int port,
998 int lower_transport, const char *real_challenge)
1617ad97
FB
999{
1000 RTSPState *rt = s->priv_data;
f830c9a4 1001 int rtx, j, i, err, interleave = 0;
1617ad97 1002 RTSPStream *rtsp_st;
a9e534d5 1003 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1004 char cmd[2048];
e9dea59f
RB
1005 const char *trans_pref;
1006
119b4668 1007 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1008 trans_pref = "x-pn-tng";
1009 else
1010 trans_pref = "RTP/AVP";
115329f1 1011
30e79845
RB
1012 /* default timeout: 1 minute */
1013 rt->timeout = 60;
1014
1617ad97
FB
1015 /* for each stream, make the setup request */
1016 /* XXX: we assume the same server is used for the control of each
c8965800 1017 * RTSP stream */
d1ccf0e0 1018
c8965800 1019 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1020 char transport[2048];
1021
f830c9a4
RB
1022 /**
1023 * WMS serves all UDP data over a single connection, the RTX, which
1024 * isn't necessarily the first in the SDP but has to be the first
1025 * to be set up, else the second/third SETUP will fail with a 461.
1026 */
1027 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1028 rt->server_type == RTSP_SERVER_WMS) {
1029 if (i == 0) {
1030 /* rtx first */
1031 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1032 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1033 if (len >= 4 &&
c8965800
RB
1034 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1035 "/rtx"))
f830c9a4
RB
1036 break;
1037 }
1038 if (rtx == rt->nb_rtsp_streams)
1039 return -1; /* no RTX found */
1040 rtsp_st = rt->rtsp_streams[rtx];
1041 } else
1042 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1043 } else
2fea9650 1044 rtsp_st = rt->rtsp_streams[i];
1617ad97 1045
1617ad97 1046 /* RTP/UDP */
90abbdba 1047 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1048 char buf[256];
85fb7b34 1049
f830c9a4
RB
1050 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1051 port = reply->transports[0].client_port_min;
1052 goto have_port;
1053 }
1054
85fb7b34 1055 /* first try in specified port range */
d1ccf0e0 1056 if (RTSP_RTP_PORT_MIN != 0) {
c8965800
RB
1057 while (j <= RTSP_RTP_PORT_MAX) {
1058 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1059 host, j);
1060 /* we will use two ports per rtp stream (rtp and rtcp) */
1061 j += 2;
1062 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1063 goto rtp_opened;
1064 }
1617ad97 1065 }
85fb7b34 1066
c8965800
RB
1067#if 0
1068 /* then try on any port */
1069 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1070 err = AVERROR_INVALIDDATA;
1071 goto fail;
1072 }
1073#endif
85fb7b34
FB
1074
1075 rtp_opened:
8b1ab7bf 1076 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1077 have_port:
0ad306bc 1078 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1079 "%s/UDP;", trans_pref);
1080 if (rt->server_type != RTSP_SERVER_REAL)
1081 av_strlcat(transport, "unicast;", sizeof(transport));
1082 av_strlcatf(transport, sizeof(transport),
1083 "client_port=%d", port);
f830c9a4
RB
1084 if (rt->transport == RTSP_TRANSPORT_RTP &&
1085 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1086 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1087 }
1088
1089 /* RTP/TCP */
90abbdba 1090 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1091 /** For WMS streams, the application streams are only used for
1092 * UDP. When trying to set it up for TCP streams, the server
1093 * will return an error. Therefore, we skip those streams. */
1094 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1095 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1096 CODEC_TYPE_DATA)
090438cc 1097 continue;
0ad306bc 1098 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1099 "%s/TCP;", trans_pref);
1100 if (rt->server_type == RTSP_SERVER_WMS)
1101 av_strlcat(transport, "unicast;", sizeof(transport));
1102 av_strlcatf(transport, sizeof(transport),
1103 "interleaved=%d-%d",
1104 interleave, interleave + 1);
1105 interleave += 2;
1617ad97
FB
1106 }
1107
90abbdba 1108 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1109 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1110 "%s/UDP;multicast", trans_pref);
1617ad97 1111 }
69adcc4f
MS
1112 if (s->oformat) {
1113 av_strlcat(transport, ";mode=receive", sizeof(transport));
1114 } else if (rt->server_type == RTSP_SERVER_REAL ||
d1c6e47c 1115 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1116 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1117 snprintf(cmd, sizeof(cmd),
b6892136
FB
1118 "SETUP %s RTSP/1.0\r\n"
1119 "Transport: %s\r\n",
1617ad97 1120 rtsp_st->control_url, transport);
2e889ae4 1121 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1122 char real_res[41], real_csum[9];
1123 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1124 real_challenge);
1125 av_strlcatf(cmd, sizeof(cmd),
1126 "If-Match: %s\r\n"
1127 "RealChallenge2: %s, sd=%s\r\n",
1128 rt->session_id, real_res, real_csum);
1129 }
1617ad97 1130 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1131 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1132 err = 1;
1133 goto fail;
7e6ca34f
RB
1134 } else if (reply->status_code != RTSP_STATUS_OK ||
1135 reply->nb_transports != 1) {
1617ad97
FB
1136 err = AVERROR_INVALIDDATA;
1137 goto fail;
1138 }
1139
1140 /* XXX: same protocol for all streams is required */
1141 if (i > 0) {
119b4668
RB
1142 if (reply->transports[0].lower_transport != rt->lower_transport ||
1143 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1144 err = AVERROR_INVALIDDATA;
1145 goto fail;
1146 }
1147 } else {
90abbdba 1148 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1149 rt->transport = reply->transports[0].transport;
1617ad97
FB
1150 }
1151
1152 /* close RTP connection if not choosen */
90abbdba
RB
1153 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1154 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1155 url_close(rtsp_st->rtp_handle);
1156 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1157 }
1158
90abbdba
RB
1159 switch(reply->transports[0].lower_transport) {
1160 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1161 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1162 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1163 break;
115329f1 1164
c8965800
RB
1165 case RTSP_LOWER_TRANSPORT_UDP: {
1166 char url[1024];
1167
1168 /* XXX: also use address if specified */
1169 snprintf(url, sizeof(url), "rtp://%s:%d",
1170 host, reply->transports[0].server_port_min);
1171 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1172 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1173 err = AVERROR_INVALIDDATA;
1174 goto fail;
1617ad97 1175 }
9c8fa20d
MS
1176 /* Try to initialize the connection state in a
1177 * potential NAT router by sending dummy packets.
1178 * RTP/RTCP dummy packets are used for RDT, too.
1179 */
30ff7c5c 1180 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1181 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1182 break;
c8965800
RB
1183 }
1184 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1185 char url[1024];
1186 struct in_addr in;
1187 int port, ttl;
1188
1189 if (reply->transports[0].destination) {
1190 in.s_addr = htonl(reply->transports[0].destination);
1191 port = reply->transports[0].port_min;
1192 ttl = reply->transports[0].ttl;
1193 } else {
1194 in = rtsp_st->sdp_ip;
1195 port = rtsp_st->sdp_port;
1196 ttl = rtsp_st->sdp_ttl;
1197 }
1198 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1199 inet_ntoa(in), port, ttl);
1200 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1201 err = AVERROR_INVALIDDATA;
1202 goto fail;
1617ad97
FB
1203 }
1204 break;
1205 }
c8965800 1206 }
d1ccf0e0 1207
ee0cb67f 1208 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1209 goto fail;
1617ad97
FB
1210 }
1211
30e79845
RB
1212 if (reply->timeout > 0)
1213 rt->timeout = reply->timeout;
1214
2e889ae4 1215 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1216 rt->need_subscription = 1;
1217
53620bba
RB
1218 return 0;
1219
1220fail:
c8965800 1221 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1222 if (rt->rtsp_streams[i]->rtp_handle) {
1223 url_close(rt->rtsp_streams[i]->rtp_handle);
1224 rt->rtsp_streams[i]->rtp_handle = NULL;
1225 }
1226 }
53620bba
RB
1227 return err;
1228}
1229
1ced9da3
LA
1230static int rtsp_read_play(AVFormatContext *s)
1231{
1232 RTSPState *rt = s->priv_data;
1233 RTSPMessageHeader reply1, *reply = &reply1;
1234 char cmd[1024];
1235
1236 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1237
1238 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1239 if (rt->state == RTSP_STATE_PAUSED) {
1240 snprintf(cmd, sizeof(cmd),
1241 "PLAY %s RTSP/1.0\r\n",
00eb13e0 1242 rt->control_uri);
1ced9da3
LA
1243 } else {
1244 snprintf(cmd, sizeof(cmd),
1245 "PLAY %s RTSP/1.0\r\n"
1246 "Range: npt=%0.3f-\r\n",
00eb13e0 1247 rt->control_uri,
1ced9da3
LA
1248 (double)rt->seek_timestamp / AV_TIME_BASE);
1249 }
1250 rtsp_send_cmd(s, cmd, reply, NULL);
1251 if (reply->status_code != RTSP_STATUS_OK) {
1252 return -1;
1253 }
1254 }
c02fd3d2 1255 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1256 return 0;
1257}
1258
e23d195d
MS
1259static int rtsp_setup_input_streams(AVFormatContext *s)
1260{
1261 RTSPState *rt = s->priv_data;
1262 RTSPMessageHeader reply1, *reply = &reply1;
1263 char cmd[1024];
1264 unsigned char *content = NULL;
1265 int ret;
1266
1267 /* describe the stream */
1268 snprintf(cmd, sizeof(cmd),
1269 "DESCRIBE %s RTSP/1.0\r\n"
1270 "Accept: application/sdp\r\n",
1271 s->filename);
1272 if (rt->server_type == RTSP_SERVER_REAL) {
1273 /**
1274 * The Require: attribute is needed for proper streaming from
1275 * Realmedia servers.
1276 */
1277 av_strlcat(cmd,
1278 "Require: com.real.retain-entity-for-setup\r\n",
1279 sizeof(cmd));
1280 }
1281 rtsp_send_cmd(s, cmd, reply, &content);
1282 if (!content)
1283 return AVERROR_INVALIDDATA;
1284 if (reply->status_code != RTSP_STATUS_OK) {
1285 av_freep(&content);
1286 return AVERROR_INVALIDDATA;
1287 }
1288
1289 /* now we got the SDP description, we parse it */
1290 ret = sdp_parse(s, (const char *)content);
1291 av_freep(&content);
1292 if (ret < 0)
1293 return AVERROR_INVALIDDATA;
1294
1295 return 0;
1296}
1297
4280f9bb 1298static int rtsp_connect(AVFormatContext *s)
53620bba
RB
1299{
1300 RTSPState *rt = s->priv_data;
921da217
LB
1301 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1302 char *option_list, *option, *filename;
53620bba 1303 URLContext *rtsp_hd;
e23d195d 1304 int port, err;
a9e534d5 1305 RTSPMessageHeader reply1, *reply = &reply1;
90abbdba 1306 int lower_transport_mask = 0;
1cf151e9 1307 char real_challenge[64];
c8965800 1308redirect:
53620bba 1309 /* extract hostname and port */
f9337897 1310 url_split(NULL, 0, auth, sizeof(auth),
53620bba 1311 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897
RB
1312 if (*auth) {
1313 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1314
1315 if (!(rt->auth_b64 = av_malloc(b64_len)))
1316 return AVERROR(ENOMEM);
1317 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1318 err = AVERROR(EINVAL);
1319 goto fail;
1320 }
1321 }
53620bba
RB
1322 if (port < 0)
1323 port = RTSP_DEFAULT_PORT;
1324
1325 /* search for options */
1326 option_list = strchr(path, '?');
1327 if (option_list) {
921da217 1328 filename = strchr(s->filename, '?');
c8965800 1329 while (option_list) {
53620bba 1330 /* move the option pointer */
921da217 1331 option = ++option_list;
53620bba
RB
1332 option_list = strchr(option_list, '&');
1333 if (option_list)
921da217
LB
1334 *option_list = 0;
1335
53620bba 1336 /* handle the options */
c8965800 1337 if (!strcmp(option, "udp")) {
90abbdba 1338 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1339 } else if (!strcmp(option, "multicast")) {
90abbdba 1340 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1341 } else if (!strcmp(option, "tcp")) {
90abbdba 1342 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1343 } else {
921da217
LB
1344 strcpy(++filename, option);
1345 filename += strlen(option);
1346 if (option_list) *filename = '&';
1347 }
53620bba 1348 }
921da217 1349 *filename = 0;
53620bba
RB
1350 }
1351
90abbdba 1352 if (!lower_transport_mask)
2a1d51c5 1353 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba
RB
1354
1355 /* open the tcp connexion */
1356 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
f9337897
RB
1357 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1358 err = AVERROR(EIO);
1359 goto fail;
1360 }
53620bba
RB
1361 rt->rtsp_hd = rtsp_hd;
1362 rt->seq = 0;
1363
c8965800
RB
1364 /* request options supported by the server; this also detects server
1365 * type */
00eb13e0
AS
1366 av_strlcpy(rt->control_uri, s->filename,
1367 sizeof(rt->control_uri));
1cf151e9
RB
1368 for (rt->server_type = RTSP_SERVER_RTP;;) {
1369 snprintf(cmd, sizeof(cmd),
1370 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1371 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1372 av_strlcat(cmd,
1373 /**
1374 * The following entries are required for proper
1375 * streaming from a Realmedia server. They are
1376 * interdependent in some way although we currently
1377 * don't quite understand how. Values were copied
1378 * from mplayer SVN r23589.
1379 * @param CompanyID is a 16-byte ID in base64
1380 * @param ClientChallenge is a 16-byte ID in hex
1381 */
1382 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1383 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1384 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1385 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1386 sizeof(cmd));
1387 rtsp_send_cmd(s, cmd, reply, NULL);
1388 if (reply->status_code != RTSP_STATUS_OK) {
1389 err = AVERROR_INVALIDDATA;
1390 goto fail;
1391 }
1392
1393 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1394 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1395 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1396 continue;
7a86bafa
RB
1397 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1398 rt->server_type = RTSP_SERVER_WMS;
c8965800 1399 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1400 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1401 break;
1402 }
1403
e23d195d
MS
1404 err = rtsp_setup_input_streams(s);
1405 if (err)
53620bba 1406 goto fail;
53620bba 1407
8a8754d8 1408 do {
c8965800
RB
1409 int lower_transport = ff_log2_tab[lower_transport_mask &
1410 ~(lower_transport_mask - 1)];
8a8754d8 1411
90abbdba 1412 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1413 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1414 real_challenge : NULL);
8a8754d8 1415 if (err < 0)
7e6ca34f 1416 goto fail;
90abbdba
RB
1417 lower_transport_mask &= ~(1 << lower_transport);
1418 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1419 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1420 goto fail;
1421 }
1422 } while (err);
53620bba 1423
ff762d6e 1424 rt->state = RTSP_STATE_IDLE;
c8965800 1425 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1426 return 0;
1427 fail:
52aa4338 1428 rtsp_close_streams(s);
1617ad97 1429 url_close(rt->rtsp_hd);
d243ba30
LB
1430 if (reply->status_code >=300 && reply->status_code < 400) {
1431 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1432 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1433 reply->status_code,
1434 s->filename);
1435 goto redirect;
1436 }
1617ad97
FB
1437 return err;
1438}
1439
4280f9bb
MS
1440static int rtsp_read_header(AVFormatContext *s,
1441 AVFormatParameters *ap)
1442{
1443 RTSPState *rt = s->priv_data;
1444 int ret;
1445
1446 ret = rtsp_connect(s);
1447 if (ret)
1448 return ret;
1449
1450 if (ap->initial_pause) {
1451 /* do not start immediately */
1452 } else {
1453 if (rtsp_read_play(s) < 0) {
1454 rtsp_close_streams(s);
1455 url_close(rt->rtsp_hd);
1456 return AVERROR_INVALIDDATA;
1457 }
1458 }
1459
1460 return 0;
1461}
1462
0e59034e
RB
1463static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1464 uint8_t *buf, int buf_size)
1465{
1466 RTSPState *rt = s->priv_data;
1467 RTSPStream *rtsp_st;
1468 fd_set rfds;
1469 int fd, fd_max, n, i, ret, tcp_fd;
1470 struct timeval tv;
1471
c8965800 1472 for (;;) {
0e59034e
RB
1473 if (url_interrupt_cb())
1474 return AVERROR(EINTR);
1475 FD_ZERO(&rfds);
1476 if (rt->rtsp_hd) {
1477 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1478 FD_SET(tcp_fd, &rfds);
1479 } else {
1480 fd_max = 0;
1481 tcp_fd = -1;
1482 }
c8965800 1483 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1484 rtsp_st = rt->rtsp_streams[i];
1485 if (rtsp_st->rtp_handle) {
1486 /* currently, we cannot probe RTCP handle because of
1487 * blocking restrictions */
1488 fd = url_get_file_handle(rtsp_st->rtp_handle);
1489 if (fd > fd_max)
1490 fd_max = fd;
1491 FD_SET(fd, &rfds);
1492 }
1493 }
1494 tv.tv_sec = 0;
1495 tv.tv_usec = 100 * 1000;
1496 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1497 if (n > 0) {
c8965800 1498 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1499 rtsp_st = rt->rtsp_streams[i];
1500 if (rtsp_st->rtp_handle) {
1501 fd = url_get_file_handle(rtsp_st->rtp_handle);
1502 if (FD_ISSET(fd, &rfds)) {
1503 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1504 if (ret > 0) {
1505 *prtsp_st = rtsp_st;
1506 return ret;
1507 }
1508 }
1509 }
1510 }
1511#if CONFIG_RTSP_DEMUXER
27000636 1512 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1513 RTSPMessageHeader reply;
1514
1515 rtsp_read_reply(s, &reply, NULL, 0);
1516 /* XXX: parse message */
c02fd3d2 1517 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1518 return 0;
1519 }
1520#endif
1521 }
1522 }
1523}
1524
8b1ab7bf
FB
1525static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1526 uint8_t *buf, int buf_size)
1617ad97
FB
1527{
1528 RTSPState *rt = s->priv_data;
b6892136 1529 int id, len, i, ret;
1617ad97 1530 RTSPStream *rtsp_st;
1617ad97 1531
b6892136 1532#ifdef DEBUG_RTP_TCP
67c9cd69 1533 dprintf(s, "tcp_read_packet:\n");
b6892136 1534#endif
c8965800
RB
1535redo:
1536 for (;;) {
7e726132
RB
1537 RTSPMessageHeader reply;
1538
1539 ret = rtsp_read_reply(s, &reply, NULL, 1);
1540 if (ret == -1)
8b1ab7bf 1541 return -1;
7e726132 1542 if (ret == 1) /* received '$' */
1617ad97 1543 break;
7e726132 1544 /* XXX: parse message */
c02fd3d2 1545 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1546 return 0;
1617ad97 1547 }
0e848977 1548 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1549 if (ret != 3)
8b1ab7bf 1550 return -1;
c8965800 1551 id = buf[0];
80fb8234 1552 len = AV_RB16(buf + 1);
b6892136 1553#ifdef DEBUG_RTP_TCP
67c9cd69 1554 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1555#endif
8b1ab7bf 1556 if (len > buf_size || len < 12)
1617ad97
FB
1557 goto redo;
1558 /* get the data */
0e848977 1559 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1560 if (ret != len)
8b1ab7bf 1561 return -1;
985b05d3 1562 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1563 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1564 return -1;
115329f1 1565
1617ad97 1566 /* find the matching stream */
c8965800 1567 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1568 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1569 if (id >= rtsp_st->interleaved_min &&
1570 id <= rtsp_st->interleaved_max)
1617ad97
FB
1571 goto found;
1572 }
1573 goto redo;
c8965800 1574found:
8b1ab7bf
FB
1575 *prtsp_st = rtsp_st;
1576 return len;
1617ad97
FB
1577}
1578
0e59034e
RB
1579static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1580{
1581 RTSPState *rt = s->priv_data;
1582 int ret, len;
1583 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1584 RTSPStream *rtsp_st;
1585
1586 /* get next frames from the same RTP packet */
1587 if (rt->cur_transport_priv) {
c8965800 1588 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1589 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1590 } else
0e59034e
RB
1591 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1592 if (ret == 0) {
1593 rt->cur_transport_priv = NULL;
1594 return 0;
1595 } else if (ret == 1) {
1596 return 0;
c8965800 1597 } else
0e59034e 1598 rt->cur_transport_priv = NULL;
0e59034e
RB
1599 }
1600
1601 /* read next RTP packet */
1602 redo:
1603 switch(rt->lower_transport) {
1604 default:
1605#if CONFIG_RTSP_DEMUXER
1606 case RTSP_LOWER_TRANSPORT_TCP:
1607 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1608 break;
1609#endif
1610 case RTSP_LOWER_TRANSPORT_UDP:
1611 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1612 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1613 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1614 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1615 break;
1616 }
1617 if (len < 0)
1618 return len;
1619 if (len == 0)
1620 return AVERROR_EOF;
c8965800 1621 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1622 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1623 } else
0e59034e
RB
1624 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1625 if (ret < 0)
1626 goto redo;
c8965800 1627 if (ret == 1)
0e59034e
RB
1628 /* more packets may follow, so we save the RTP context */
1629 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1630
1631 return ret;
1632}
1633
c8965800 1634static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1635{
1636 RTSPState *rt = s->priv_data;
98713182 1637 int ret;
30e79845
RB
1638 RTSPMessageHeader reply1, *reply = &reply1;
1639 char cmd[1024];
8b1ab7bf 1640
572c6a38 1641 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1642 int i;
572c6a38 1643 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1644
572c6a38
RB
1645 for (i = 0; i < s->nb_streams; i++)
1646 cache[i] = s->streams[i]->discard;
1647
1648 if (!rt->need_subscription) {
1649 if (memcmp (cache, rt->real_setup_cache,
1650 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1651 snprintf(cmd, sizeof(cmd),
7eaa646f
RB
1652 "SET_PARAMETER %s RTSP/1.0\r\n"
1653 "Unsubscribe: %s\r\n",
00eb13e0 1654 rt->control_uri, rt->last_subscription);
572c6a38
RB
1655 rtsp_send_cmd(s, cmd, reply, NULL);
1656 if (reply->status_code != RTSP_STATUS_OK)
1657 return AVERROR_INVALIDDATA;
1658 rt->need_subscription = 1;
1659 }
1256d16b 1660 }
1256d16b 1661
572c6a38
RB
1662 if (rt->need_subscription) {
1663 int r, rule_nr, first = 1;
1664
1665 memcpy(rt->real_setup_cache, cache,
1666 sizeof(enum AVDiscard) * s->nb_streams);
1667 rt->last_subscription[0] = 0;
1668
1669 snprintf(cmd, sizeof(cmd),
1670 "SET_PARAMETER %s RTSP/1.0\r\n"
1671 "Subscribe: ",
00eb13e0 1672 rt->control_uri);
572c6a38
RB
1673 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1674 rule_nr = 0;
1675 for (r = 0; r < s->nb_streams; r++) {
1676 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1677 if (s->streams[r]->discard != AVDISCARD_ALL) {
1678 if (!first)
1679 av_strlcat(rt->last_subscription, ",",
1680 sizeof(rt->last_subscription));
1681 ff_rdt_subscribe_rule(
1682 rt->last_subscription,
1683 sizeof(rt->last_subscription), i, rule_nr);
1684 first = 0;
1685 }
1686 rule_nr++;
1687 }
1688 }
1689 }
1690 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1691 rtsp_send_cmd(s, cmd, reply, NULL);
1692 if (reply->status_code != RTSP_STATUS_OK)
1693 return AVERROR_INVALIDDATA;
1694 rt->need_subscription = 0;
1695
c02fd3d2 1696 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1697 rtsp_read_play (s);
1698 }
1256d16b
RB
1699 }
1700
d7250724 1701 ret = rtsp_fetch_packet(s, pkt);
c8965800 1702 if (ret < 0)
98713182 1703 return ret;
30e79845
RB
1704
1705 /* send dummy request to keep TCP connection alive */
1706 if ((rt->server_type == RTSP_SERVER_WMS ||
1707 rt->server_type == RTSP_SERVER_REAL) &&
1708 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1709 if (rt->server_type == RTSP_SERVER_WMS) {
1710 snprintf(cmd, sizeof(cmd) - 1,
1711 "GET_PARAMETER %s RTSP/1.0\r\n",
00eb13e0 1712 rt->control_uri);
2e13ecfe 1713 rtsp_send_cmd_async(s, cmd);
30e79845 1714 } else {
2e13ecfe 1715 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
30e79845
RB
1716 }
1717 }
1718
8b1ab7bf 1719 return 0;
1617ad97
FB
1720}
1721
ff762d6e
FB
1722/* pause the stream */
1723static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1724{
ff762d6e 1725 RTSPState *rt = s->priv_data;
a9e534d5 1726 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1727 char cmd[1024];
1728
b7b8fc34 1729 rt = s->priv_data;
115329f1 1730
c02fd3d2 1731 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1732 return 0;
2e889ae4 1733 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1734 snprintf(cmd, sizeof(cmd),
1735 "PAUSE %s RTSP/1.0\r\n",
00eb13e0 1736 rt->control_uri);
99b2ac07
RB
1737 rtsp_send_cmd(s, cmd, reply, NULL);
1738 if (reply->status_code != RTSP_STATUS_OK) {
1739 return -1;
1740 }
1256d16b 1741 }
5f86057f
RB
1742 rt->state = RTSP_STATE_PAUSED;
1743 return 0;
b7b8fc34
FB
1744}
1745
115329f1 1746static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1747 int64_t timestamp, int flags)
ff762d6e
FB
1748{
1749 RTSPState *rt = s->priv_data;
115329f1 1750
c8965800
RB
1751 rt->seek_timestamp = av_rescale_q(timestamp,
1752 s->streams[stream_index]->time_base,
1753 AV_TIME_BASE_Q);
ff762d6e
FB
1754 switch(rt->state) {
1755 default:
1756 case RTSP_STATE_IDLE:
1757 break;
c02fd3d2 1758 case RTSP_STATE_STREAMING:
ec606b36
LB
1759 if (rtsp_read_pause(s) != 0)
1760 return -1;
1761 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1762 if (rtsp_read_play(s) != 0)
1763 return -1;
1764 break;
1765 case RTSP_STATE_PAUSED:
1766 rt->state = RTSP_STATE_IDLE;
1767 break;
1768 }
1769 return 0;
1770}
1771
1617ad97
FB
1772static int rtsp_read_close(AVFormatContext *s)
1773{
1774 RTSPState *rt = s->priv_data;
1617ad97
FB
1775 char cmd[1024];
1776
b6892136 1777#if 0
1617ad97 1778 /* NOTE: it is valid to flush the buffer here */
90abbdba 1779 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1780 url_fclose(&rt->rtsp_gb);
1781 }
b6892136 1782#endif
115329f1 1783 snprintf(cmd, sizeof(cmd),
b6892136 1784 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97 1785 s->filename);
2e13ecfe 1786 rtsp_send_cmd_async(s, cmd);
1617ad97 1787
52aa4338 1788 rtsp_close_streams(s);
1617ad97
FB
1789 url_close(rt->rtsp_hd);
1790 return 0;
1791}
1792
d2a067d1 1793AVInputFormat rtsp_demuxer = {
1617ad97 1794 "rtsp",
bde15e74 1795 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1796 sizeof(RTSPState),
1797 rtsp_probe,
1798 rtsp_read_header,
1799 rtsp_read_packet,
1800 rtsp_read_close,
ff762d6e 1801 rtsp_read_seek,
bb76a117 1802 .flags = AVFMT_NOFILE,
ff762d6e
FB
1803 .read_play = rtsp_read_play,
1804 .read_pause = rtsp_read_pause,
1617ad97 1805};
96862926 1806#endif
1617ad97 1807
cb1fdc61 1808static int sdp_probe(AVProbeData *p1)
93ced3e8 1809{
0e1ceacd 1810 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1811
1812 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1813 while (p < p_end && *p != '\0') {
c8965800
RB
1814 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1815 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1816 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1817
c8965800 1818 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1819 if (++p >= p_end)
cb1fdc61 1820 break;
cb1fdc61
FB
1821 if (*p == '\r')
1822 p++;
1823 }
93ced3e8
FB
1824 return 0;
1825}
1826
1827#define SDP_MAX_SIZE 8192
1828
c8965800 1829static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1830{
8b1ab7bf 1831 RTSPState *rt = s->priv_data;
93ced3e8
FB
1832 RTSPStream *rtsp_st;
1833 int size, i, err;
1834 char *content;
1835 char url[1024];
1836
1837 /* read the whole sdp file */
1838 /* XXX: better loading */
1839 content = av_malloc(SDP_MAX_SIZE);
899681cd 1840 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1841 if (size <= 0) {
1842 av_free(content);
1843 return AVERROR_INVALIDDATA;
1844 }
1845 content[size] ='\0';
1846
1847 sdp_parse(s, content);
1848 av_free(content);
1849
1850 /* open each RTP stream */
c8965800 1851 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1852 rtsp_st = rt->rtsp_streams[i];
115329f1 1853
d2bf42be 1854 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1855 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1856 rtsp_st->sdp_port,
d2bf42be 1857 rtsp_st->sdp_port,
93ced3e8 1858 rtsp_st->sdp_ttl);
dbf30963 1859 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1860 err = AVERROR_INVALIDDATA;
1861 goto fail;
1862 }
ee0cb67f 1863 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1864 goto fail;
93ced3e8
FB
1865 }
1866 return 0;
c8965800 1867fail:
52aa4338 1868 rtsp_close_streams(s);
93ced3e8
FB
1869 return err;
1870}
1871
93ced3e8
FB
1872static int sdp_read_close(AVFormatContext *s)
1873{
52aa4338 1874 rtsp_close_streams(s);
93ced3e8
FB
1875 return 0;
1876}
1877
ff70e601 1878AVInputFormat sdp_demuxer = {
93ced3e8 1879 "sdp",
bde15e74 1880 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1881 sizeof(RTSPState),
1882 sdp_probe,
1883 sdp_read_header,
d7250724 1884 rtsp_fetch_packet,
93ced3e8
FB
1885 sdp_read_close,
1886};