Move predict_field_decoding_flag() from h264.h to .c as its only used there and belongs
[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
LA
574/* close and free RTSP streams */
575static void rtsp_close_streams(RTSPState *rt)
576{
577 int i;
578 RTSPStream *rtsp_st;
579
c8965800 580 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1ced9da3
LA
581 rtsp_st = rt->rtsp_streams[i];
582 if (rtsp_st) {
583 if (rtsp_st->transport_priv) {
584 if (rt->transport == RTSP_TRANSPORT_RDT)
585 ff_rdt_parse_close(rtsp_st->transport_priv);
586 else
587 rtp_parse_close(rtsp_st->transport_priv);
588 }
589 if (rtsp_st->rtp_handle)
590 url_close(rtsp_st->rtp_handle);
591 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
592 rtsp_st->dynamic_handler->close(
593 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
594 }
595 }
596 av_free(rt->rtsp_streams);
597 if (rt->asf_ctx) {
598 av_close_input_stream (rt->asf_ctx);
599 rt->asf_ctx = NULL;
600 }
601 av_freep(&rt->auth_b64);
602}
603
c8965800 604static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
605{
606 RTSPState *rt = s->priv_data;
607 AVStream *st = NULL;
608
609 /* open the RTP context */
610 if (rtsp_st->stream_index >= 0)
611 st = s->streams[rtsp_st->stream_index];
612 if (!st)
613 s->ctx_flags |= AVFMTCTX_NOHEADER;
614
615 if (rt->transport == RTSP_TRANSPORT_RDT)
616 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
617 rtsp_st->dynamic_protocol_context,
618 rtsp_st->dynamic_handler);
619 else
620 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
621 rtsp_st->sdp_payload_type,
622 &rtsp_st->rtp_payload_data);
623
624 if (!rtsp_st->transport_priv) {
625 return AVERROR(ENOMEM);
626 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 627 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
628 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
629 rtsp_st->dynamic_protocol_context,
630 rtsp_st->dynamic_handler);
631 }
632 }
633
634 return 0;
635}
636
103dfbe2 637#if CONFIG_RTSP_DEMUXER
1ced9da3
LA
638static int rtsp_probe(AVProbeData *p)
639{
640 if (av_strstart(p->filename, "rtsp:", NULL))
641 return AVPROBE_SCORE_MAX;
642 return 0;
643}
644
1617ad97
FB
645static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
646{
647 const char *p;
648 int v;
649
650 p = *pp;
651 skip_spaces(&p);
652 v = strtol(p, (char **)&p, 10);
653 if (*p == '-') {
654 p++;
655 *min_ptr = v;
656 v = strtol(p, (char **)&p, 10);
657 *max_ptr = v;
658 } else {
659 *min_ptr = v;
660 *max_ptr = v;
661 }
662 *pp = p;
663}
664
665/* XXX: only one transport specification is parsed */
a9e534d5 666static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
667{
668 char transport_protocol[16];
669 char profile[16];
670 char lower_transport[16];
671 char parameter[16];
672 RTSPTransportField *th;
673 char buf[256];
115329f1 674
1617ad97 675 reply->nb_transports = 0;
115329f1 676
c8965800 677 for (;;) {
1617ad97
FB
678 skip_spaces(&p);
679 if (*p == '\0')
680 break;
681
682 th = &reply->transports[reply->nb_transports];
683
115329f1 684 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 685 "/", &p);
e1502118 686 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
687 get_word_sep(profile, sizeof(profile), "/;,", &p);
688 lower_transport[0] = '\0';
689 /* rtp/avp/<protocol> */
690 if (*p == '/') {
7ecc634e
LB
691 get_word_sep(lower_transport, sizeof(lower_transport),
692 ";,", &p);
119b4668
RB
693 }
694 th->transport = RTSP_TRANSPORT_RTP;
695 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
696 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 697 /* x-pn-tng/<protocol> */
e1502118
LB
698 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
699 profile[0] = '\0';
119b4668 700 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 701 }
b6892136 702 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 703 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 704 else
90abbdba 705 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 706
1617ad97
FB
707 if (*p == ';')
708 p++;
709 /* get each parameter */
710 while (*p != '\0' && *p != ',') {
711 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
712 if (!strcmp(parameter, "port")) {
713 if (*p == '=') {
714 p++;
715 rtsp_parse_range(&th->port_min, &th->port_max, &p);
716 }
717 } else if (!strcmp(parameter, "client_port")) {
718 if (*p == '=') {
719 p++;
115329f1 720 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
721 &th->client_port_max, &p);
722 }
723 } else if (!strcmp(parameter, "server_port")) {
724 if (*p == '=') {
725 p++;
115329f1 726 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
727 &th->server_port_max, &p);
728 }
729 } else if (!strcmp(parameter, "interleaved")) {
730 if (*p == '=') {
731 p++;
115329f1 732 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
733 &th->interleaved_max, &p);
734 }
735 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
736 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
737 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
738 } else if (!strcmp(parameter, "ttl")) {
739 if (*p == '=') {
740 p++;
741 th->ttl = strtol(p, (char **)&p, 10);
742 }
743 } else if (!strcmp(parameter, "destination")) {
744 struct in_addr ipaddr;
745
746 if (*p == '=') {
747 p++;
748 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 749 if (inet_aton(buf, &ipaddr))
1617ad97
FB
750 th->destination = ntohl(ipaddr.s_addr);
751 }
752 }
753 while (*p != ';' && *p != '\0' && *p != ',')
754 p++;
755 if (*p == ';')
756 p++;
757 }
758 if (*p == ',')
759 p++;
760
761 reply->nb_transports++;
762 }
763}
764
a9e534d5 765void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
766{
767 const char *p;
768
769 /* NOTE: we do case independent match for broken servers */
770 p = buf;
f7d78f36 771 if (av_stristart(p, "Session:", &p)) {
30e79845 772 int t;
1617ad97 773 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
774 if (av_stristart(p, ";timeout=", &p) &&
775 (t = strtol(p, NULL, 10)) > 0) {
776 reply->timeout = t;
777 }
f7d78f36 778 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 779 reply->content_length = strtol(p, NULL, 10);
f7d78f36 780 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 781 rtsp_parse_transport(reply, p);
f7d78f36 782 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 783 reply->seq = strtol(p, NULL, 10);
f7d78f36 784 } else if (av_stristart(p, "Range:", &p)) {
31693e00 785 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
786 } else if (av_stristart(p, "RealChallenge1:", &p)) {
787 skip_spaces(&p);
788 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
789 } else if (av_stristart(p, "Server:", &p)) {
790 skip_spaces(&p);
791 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
792 } else if (av_stristart(p, "Notice:", &p) ||
793 av_stristart(p, "X-Notice:", &p)) {
794 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
795 } else if (av_stristart(p, "Location:", &p)) {
796 skip_spaces(&p);
797 av_strlcpy(reply->location, p , sizeof(reply->location));
1617ad97
FB
798 }
799}
800
b7b8fc34
FB
801/* skip a RTP/TCP interleaved packet */
802static void rtsp_skip_packet(AVFormatContext *s)
803{
804 RTSPState *rt = s->priv_data;
805 int ret, len, len1;
806 uint8_t buf[1024];
807
0e848977 808 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
809 if (ret != 3)
810 return;
80fb8234 811 len = AV_RB16(buf + 1);
67c9cd69
BC
812
813 dprintf(s, "skipping RTP packet len=%d\n", len);
814
b7b8fc34
FB
815 /* skip payload */
816 while (len > 0) {
817 len1 = len;
818 if (len1 > sizeof(buf))
819 len1 = sizeof(buf);
0e848977 820 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
821 if (ret != len1)
822 return;
823 len -= len1;
824 }
825}
1617ad97 826
7e726132
RB
827/**
828 * Read a RTSP message from the server, or prepare to read data
829 * packets if we're reading data interleaved over the TCP/RTSP
830 * connection as well.
831 *
832 * @param s RTSP demuxer context
833 * @param reply pointer where the RTSP message header will be stored
834 * @param content_ptr pointer where the RTSP message body, if any, will
702d0a9e 835 * be stored (length is in reply)
7e726132
RB
836 * @param return_on_interleaved_data whether the function may return if we
837 * encounter a data marker ('$'), which precedes data
838 * packets over interleaved TCP/RTSP connections. If this
839 * is set, this function will return 1 after encountering
840 * a '$'. If it is not set, the function will skip any
841 * data packets (if they are encountered), until a reply
842 * has been fully parsed. If no more data is available
843 * without parsing a reply, it will return an error.
844 *
845 * @returns 1 if a data packets is ready to be received, -1 on error,
846 * and 0 on success.
847 */
c8965800
RB
848static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
849 unsigned char **content_ptr,
850 int return_on_interleaved_data)
1617ad97
FB
851{
852 RTSPState *rt = s->priv_data;
853 char buf[4096], buf1[1024], *q;
854 unsigned char ch;
855 const char *p;
7e726132 856 int ret, content_length, line_count = 0;
1617ad97
FB
857 unsigned char *content = NULL;
858
d541a7d2 859 memset(reply, 0, sizeof(*reply));
1617ad97 860
1617ad97 861 /* parse reply (XXX: use buffers) */
1617ad97 862 rt->last_reply[0] = '\0';
c8965800 863 for (;;) {
1617ad97 864 q = buf;
c8965800 865 for (;;) {
0e848977 866 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 867#ifdef DEBUG_RTP_TCP
67c9cd69 868 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
869#endif
870 if (ret != 1)
871 return -1;
1617ad97
FB
872 if (ch == '\n')
873 break;
b7b8fc34
FB
874 if (ch == '$') {
875 /* XXX: only parse it if first char on line ? */
7e726132
RB
876 if (return_on_interleaved_data) {
877 return 1;
878 } else
b7b8fc34
FB
879 rtsp_skip_packet(s);
880 } else if (ch != '\r') {
1617ad97
FB
881 if ((q - buf) < sizeof(buf) - 1)
882 *q++ = ch;
883 }
884 }
885 *q = '\0';
67c9cd69
BC
886
887 dprintf(s, "line='%s'\n", buf);
888
1617ad97
FB
889 /* test if last line */
890 if (buf[0] == '\0')
891 break;
892 p = buf;
893 if (line_count == 0) {
894 /* get reply code */
895 get_word(buf1, sizeof(buf1), &p);
896 get_word(buf1, sizeof(buf1), &p);
897 reply->status_code = atoi(buf1);
898 } else {
899 rtsp_parse_line(reply, p);
75e61b0e
MR
900 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
901 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
902 }
903 line_count++;
904 }
115329f1 905
1617ad97 906 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 907 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 908
1617ad97
FB
909 content_length = reply->content_length;
910 if (content_length > 0) {
911 /* leave some room for a trailing '\0' (useful for simple parsing) */
912 content = av_malloc(content_length + 1);
0e848977 913 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
914 content[content_length] = '\0';
915 }
916 if (content_ptr)
917 *content_ptr = content;
e2e2e7dd
AB
918 else
919 av_free(content);
7e726132 920
fccb1770
RB
921 /* EOS */
922 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
923 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 924 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 925 rt->state = RTSP_STATE_IDLE;
c8965800 926 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 927 return AVERROR(EIO); /* data or server error */
c8965800 928 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
929 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
930 return AVERROR(EPERM);
931
7e726132 932 return 0;
1617ad97
FB
933}
934
2e13ecfe 935static void rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
29b9f58b
RB
936{
937 RTSPState *rt = s->priv_data;
938 char buf[4096], buf1[1024];
939
940 rt->seq++;
941 av_strlcpy(buf, cmd, sizeof(buf));
942 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
943 av_strlcat(buf, buf1, sizeof(buf));
944 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
945 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
946 av_strlcat(buf, buf1, sizeof(buf));
947 }
f9337897
RB
948 if (rt->auth_b64)
949 av_strlcatf(buf, sizeof(buf),
ba93ea6d
RB
950 "Authorization: Basic %s\r\n",
951 rt->auth_b64);
29b9f58b 952 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
953
954 dprintf(s, "Sending:\n%s--\n", buf);
955
29b9f58b 956 url_write(rt->rtsp_hd, buf, strlen(buf));
30e79845
RB
957 rt->last_cmd_time = av_gettime();
958}
959
c8965800
RB
960static void rtsp_send_cmd(AVFormatContext *s,
961 const char *cmd, RTSPMessageHeader *reply,
962 unsigned char **content_ptr)
30e79845 963{
2e13ecfe 964 rtsp_send_cmd_async(s, cmd);
29b9f58b 965
7e726132 966 rtsp_read_reply(s, reply, content_ptr, 0);
29b9f58b
RB
967}
968
53620bba
RB
969/**
970 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
971 */
c8965800
RB
972static int make_setup_request(AVFormatContext *s, const char *host, int port,
973 int lower_transport, const char *real_challenge)
1617ad97
FB
974{
975 RTSPState *rt = s->priv_data;
f830c9a4 976 int rtx, j, i, err, interleave = 0;
1617ad97 977 RTSPStream *rtsp_st;
a9e534d5 978 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 979 char cmd[2048];
e9dea59f
RB
980 const char *trans_pref;
981
119b4668 982 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
983 trans_pref = "x-pn-tng";
984 else
985 trans_pref = "RTP/AVP";
115329f1 986
30e79845
RB
987 /* default timeout: 1 minute */
988 rt->timeout = 60;
989
1617ad97
FB
990 /* for each stream, make the setup request */
991 /* XXX: we assume the same server is used for the control of each
c8965800 992 * RTSP stream */
d1ccf0e0 993
c8965800 994 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
995 char transport[2048];
996
f830c9a4
RB
997 /**
998 * WMS serves all UDP data over a single connection, the RTX, which
999 * isn't necessarily the first in the SDP but has to be the first
1000 * to be set up, else the second/third SETUP will fail with a 461.
1001 */
1002 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1003 rt->server_type == RTSP_SERVER_WMS) {
1004 if (i == 0) {
1005 /* rtx first */
1006 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1007 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1008 if (len >= 4 &&
c8965800
RB
1009 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1010 "/rtx"))
f830c9a4
RB
1011 break;
1012 }
1013 if (rtx == rt->nb_rtsp_streams)
1014 return -1; /* no RTX found */
1015 rtsp_st = rt->rtsp_streams[rtx];
1016 } else
1017 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1018 } else
2fea9650 1019 rtsp_st = rt->rtsp_streams[i];
1617ad97 1020
1617ad97 1021 /* RTP/UDP */
90abbdba 1022 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1023 char buf[256];
85fb7b34 1024
f830c9a4
RB
1025 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1026 port = reply->transports[0].client_port_min;
1027 goto have_port;
1028 }
1029
85fb7b34 1030 /* first try in specified port range */
d1ccf0e0 1031 if (RTSP_RTP_PORT_MIN != 0) {
c8965800
RB
1032 while (j <= RTSP_RTP_PORT_MAX) {
1033 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1034 host, j);
1035 /* we will use two ports per rtp stream (rtp and rtcp) */
1036 j += 2;
1037 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1038 goto rtp_opened;
1039 }
1617ad97 1040 }
85fb7b34 1041
c8965800
RB
1042#if 0
1043 /* then try on any port */
1044 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1045 err = AVERROR_INVALIDDATA;
1046 goto fail;
1047 }
1048#endif
85fb7b34
FB
1049
1050 rtp_opened:
8b1ab7bf 1051 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1052 have_port:
0ad306bc 1053 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1054 "%s/UDP;", trans_pref);
1055 if (rt->server_type != RTSP_SERVER_REAL)
1056 av_strlcat(transport, "unicast;", sizeof(transport));
1057 av_strlcatf(transport, sizeof(transport),
1058 "client_port=%d", port);
f830c9a4
RB
1059 if (rt->transport == RTSP_TRANSPORT_RTP &&
1060 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1061 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1062 }
1063
1064 /* RTP/TCP */
90abbdba 1065 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1066 /** For WMS streams, the application streams are only used for
1067 * UDP. When trying to set it up for TCP streams, the server
1068 * will return an error. Therefore, we skip those streams. */
1069 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1070 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1071 CODEC_TYPE_DATA)
090438cc 1072 continue;
0ad306bc 1073 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1074 "%s/TCP;", trans_pref);
1075 if (rt->server_type == RTSP_SERVER_WMS)
1076 av_strlcat(transport, "unicast;", sizeof(transport));
1077 av_strlcatf(transport, sizeof(transport),
1078 "interleaved=%d-%d",
1079 interleave, interleave + 1);
1080 interleave += 2;
1617ad97
FB
1081 }
1082
90abbdba 1083 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1084 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1085 "%s/UDP;multicast", trans_pref);
1617ad97 1086 }
d1c6e47c
RB
1087 if (rt->server_type == RTSP_SERVER_REAL ||
1088 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1089 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1090 snprintf(cmd, sizeof(cmd),
b6892136
FB
1091 "SETUP %s RTSP/1.0\r\n"
1092 "Transport: %s\r\n",
1617ad97 1093 rtsp_st->control_url, transport);
2e889ae4 1094 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1095 char real_res[41], real_csum[9];
1096 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1097 real_challenge);
1098 av_strlcatf(cmd, sizeof(cmd),
1099 "If-Match: %s\r\n"
1100 "RealChallenge2: %s, sd=%s\r\n",
1101 rt->session_id, real_res, real_csum);
1102 }
1617ad97 1103 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1104 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1105 err = 1;
1106 goto fail;
7e6ca34f
RB
1107 } else if (reply->status_code != RTSP_STATUS_OK ||
1108 reply->nb_transports != 1) {
1617ad97
FB
1109 err = AVERROR_INVALIDDATA;
1110 goto fail;
1111 }
1112
1113 /* XXX: same protocol for all streams is required */
1114 if (i > 0) {
119b4668
RB
1115 if (reply->transports[0].lower_transport != rt->lower_transport ||
1116 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1117 err = AVERROR_INVALIDDATA;
1118 goto fail;
1119 }
1120 } else {
90abbdba 1121 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1122 rt->transport = reply->transports[0].transport;
1617ad97
FB
1123 }
1124
1125 /* close RTP connection if not choosen */
90abbdba
RB
1126 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1127 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1128 url_close(rtsp_st->rtp_handle);
1129 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1130 }
1131
90abbdba
RB
1132 switch(reply->transports[0].lower_transport) {
1133 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1134 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1135 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1136 break;
115329f1 1137
c8965800
RB
1138 case RTSP_LOWER_TRANSPORT_UDP: {
1139 char url[1024];
1140
1141 /* XXX: also use address if specified */
1142 snprintf(url, sizeof(url), "rtp://%s:%d",
1143 host, reply->transports[0].server_port_min);
1144 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1145 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1146 err = AVERROR_INVALIDDATA;
1147 goto fail;
1617ad97 1148 }
9c8fa20d
MS
1149 /* Try to initialize the connection state in a
1150 * potential NAT router by sending dummy packets.
1151 * RTP/RTCP dummy packets are used for RDT, too.
1152 */
1153 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1))
1154 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1155 break;
c8965800
RB
1156 }
1157 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1158 char url[1024];
1159 struct in_addr in;
1160 int port, ttl;
1161
1162 if (reply->transports[0].destination) {
1163 in.s_addr = htonl(reply->transports[0].destination);
1164 port = reply->transports[0].port_min;
1165 ttl = reply->transports[0].ttl;
1166 } else {
1167 in = rtsp_st->sdp_ip;
1168 port = rtsp_st->sdp_port;
1169 ttl = rtsp_st->sdp_ttl;
1170 }
1171 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1172 inet_ntoa(in), port, ttl);
1173 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1174 err = AVERROR_INVALIDDATA;
1175 goto fail;
1617ad97
FB
1176 }
1177 break;
1178 }
c8965800 1179 }
d1ccf0e0 1180
ee0cb67f 1181 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1182 goto fail;
1617ad97
FB
1183 }
1184
30e79845
RB
1185 if (reply->timeout > 0)
1186 rt->timeout = reply->timeout;
1187
2e889ae4 1188 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1189 rt->need_subscription = 1;
1190
53620bba
RB
1191 return 0;
1192
1193fail:
c8965800 1194 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1195 if (rt->rtsp_streams[i]->rtp_handle) {
1196 url_close(rt->rtsp_streams[i]->rtp_handle);
1197 rt->rtsp_streams[i]->rtp_handle = NULL;
1198 }
1199 }
53620bba
RB
1200 return err;
1201}
1202
1ced9da3
LA
1203static int rtsp_read_play(AVFormatContext *s)
1204{
1205 RTSPState *rt = s->priv_data;
1206 RTSPMessageHeader reply1, *reply = &reply1;
1207 char cmd[1024];
1208
1209 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1210
1211 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1212 if (rt->state == RTSP_STATE_PAUSED) {
1213 snprintf(cmd, sizeof(cmd),
1214 "PLAY %s RTSP/1.0\r\n",
00eb13e0 1215 rt->control_uri);
1ced9da3
LA
1216 } else {
1217 snprintf(cmd, sizeof(cmd),
1218 "PLAY %s RTSP/1.0\r\n"
1219 "Range: npt=%0.3f-\r\n",
00eb13e0 1220 rt->control_uri,
1ced9da3
LA
1221 (double)rt->seek_timestamp / AV_TIME_BASE);
1222 }
1223 rtsp_send_cmd(s, cmd, reply, NULL);
1224 if (reply->status_code != RTSP_STATUS_OK) {
1225 return -1;
1226 }
1227 }
1228 rt->state = RTSP_STATE_PLAYING;
1229 return 0;
1230}
1231
53620bba
RB
1232static int rtsp_read_header(AVFormatContext *s,
1233 AVFormatParameters *ap)
1234{
1235 RTSPState *rt = s->priv_data;
921da217
LB
1236 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1237 char *option_list, *option, *filename;
53620bba
RB
1238 URLContext *rtsp_hd;
1239 int port, ret, err;
a9e534d5 1240 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1241 unsigned char *content = NULL;
90abbdba 1242 int lower_transport_mask = 0;
1cf151e9 1243 char real_challenge[64];
c8965800 1244redirect:
53620bba 1245 /* extract hostname and port */
f9337897 1246 url_split(NULL, 0, auth, sizeof(auth),
53620bba 1247 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897
RB
1248 if (*auth) {
1249 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1250
1251 if (!(rt->auth_b64 = av_malloc(b64_len)))
1252 return AVERROR(ENOMEM);
1253 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1254 err = AVERROR(EINVAL);
1255 goto fail;
1256 }
1257 }
53620bba
RB
1258 if (port < 0)
1259 port = RTSP_DEFAULT_PORT;
1260
1261 /* search for options */
1262 option_list = strchr(path, '?');
1263 if (option_list) {
921da217 1264 filename = strchr(s->filename, '?');
c8965800 1265 while (option_list) {
53620bba 1266 /* move the option pointer */
921da217 1267 option = ++option_list;
53620bba
RB
1268 option_list = strchr(option_list, '&');
1269 if (option_list)
921da217
LB
1270 *option_list = 0;
1271
53620bba 1272 /* handle the options */
c8965800 1273 if (!strcmp(option, "udp")) {
90abbdba 1274 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1275 } else if (!strcmp(option, "multicast")) {
90abbdba 1276 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1277 } else if (!strcmp(option, "tcp")) {
90abbdba 1278 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1279 } else {
921da217
LB
1280 strcpy(++filename, option);
1281 filename += strlen(option);
1282 if (option_list) *filename = '&';
1283 }
53620bba 1284 }
921da217 1285 *filename = 0;
53620bba
RB
1286 }
1287
90abbdba 1288 if (!lower_transport_mask)
2a1d51c5 1289 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba
RB
1290
1291 /* open the tcp connexion */
1292 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
f9337897
RB
1293 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1294 err = AVERROR(EIO);
1295 goto fail;
1296 }
53620bba
RB
1297 rt->rtsp_hd = rtsp_hd;
1298 rt->seq = 0;
1299
c8965800
RB
1300 /* request options supported by the server; this also detects server
1301 * type */
00eb13e0
AS
1302 av_strlcpy(rt->control_uri, s->filename,
1303 sizeof(rt->control_uri));
1cf151e9
RB
1304 for (rt->server_type = RTSP_SERVER_RTP;;) {
1305 snprintf(cmd, sizeof(cmd),
1306 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1307 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1308 av_strlcat(cmd,
1309 /**
1310 * The following entries are required for proper
1311 * streaming from a Realmedia server. They are
1312 * interdependent in some way although we currently
1313 * don't quite understand how. Values were copied
1314 * from mplayer SVN r23589.
1315 * @param CompanyID is a 16-byte ID in base64
1316 * @param ClientChallenge is a 16-byte ID in hex
1317 */
1318 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1319 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1320 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1321 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1322 sizeof(cmd));
1323 rtsp_send_cmd(s, cmd, reply, NULL);
1324 if (reply->status_code != RTSP_STATUS_OK) {
1325 err = AVERROR_INVALIDDATA;
1326 goto fail;
1327 }
1328
1329 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1330 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1331 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1332 continue;
7a86bafa
RB
1333 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1334 rt->server_type = RTSP_SERVER_WMS;
c8965800 1335 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1336 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1337 break;
1338 }
1339
53620bba
RB
1340 /* describe the stream */
1341 snprintf(cmd, sizeof(cmd),
1342 "DESCRIBE %s RTSP/1.0\r\n"
1343 "Accept: application/sdp\r\n",
1344 s->filename);
2e889ae4 1345 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1346 /**
1347 * The Require: attribute is needed for proper streaming from
1348 * Realmedia servers.
1349 */
1350 av_strlcat(cmd,
1351 "Require: com.real.retain-entity-for-setup\r\n",
1352 sizeof(cmd));
1353 }
53620bba
RB
1354 rtsp_send_cmd(s, cmd, reply, &content);
1355 if (!content) {
1356 err = AVERROR_INVALIDDATA;
1357 goto fail;
1358 }
1359 if (reply->status_code != RTSP_STATUS_OK) {
1360 err = AVERROR_INVALIDDATA;
1361 goto fail;
1362 }
1363
1364 /* now we got the SDP description, we parse it */
1365 ret = sdp_parse(s, (const char *)content);
1366 av_freep(&content);
1367 if (ret < 0) {
1368 err = AVERROR_INVALIDDATA;
1369 goto fail;
1370 }
1371
8a8754d8 1372 do {
c8965800
RB
1373 int lower_transport = ff_log2_tab[lower_transport_mask &
1374 ~(lower_transport_mask - 1)];
8a8754d8 1375
90abbdba 1376 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1377 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1378 real_challenge : NULL);
8a8754d8 1379 if (err < 0)
7e6ca34f 1380 goto fail;
90abbdba
RB
1381 lower_transport_mask &= ~(1 << lower_transport);
1382 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1383 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1384 goto fail;
1385 }
1386 } while (err);
53620bba 1387
ff762d6e 1388 rt->state = RTSP_STATE_IDLE;
c8965800 1389 rt->seek_timestamp = 0; /* default is to start stream at position zero */
c04c3282 1390 if (ap->initial_pause) {
ff762d6e
FB
1391 /* do not start immediately */
1392 } else {
1393 if (rtsp_read_play(s) < 0) {
1394 err = AVERROR_INVALIDDATA;
1617ad97
FB
1395 goto fail;
1396 }
1397 }
1617ad97
FB
1398 return 0;
1399 fail:
8b1ab7bf 1400 rtsp_close_streams(rt);
1617ad97
FB
1401 av_freep(&content);
1402 url_close(rt->rtsp_hd);
d243ba30
LB
1403 if (reply->status_code >=300 && reply->status_code < 400) {
1404 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1405 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1406 reply->status_code,
1407 s->filename);
1408 goto redirect;
1409 }
1617ad97
FB
1410 return err;
1411}
1412
0e59034e
RB
1413static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1414 uint8_t *buf, int buf_size)
1415{
1416 RTSPState *rt = s->priv_data;
1417 RTSPStream *rtsp_st;
1418 fd_set rfds;
1419 int fd, fd_max, n, i, ret, tcp_fd;
1420 struct timeval tv;
1421
c8965800 1422 for (;;) {
0e59034e
RB
1423 if (url_interrupt_cb())
1424 return AVERROR(EINTR);
1425 FD_ZERO(&rfds);
1426 if (rt->rtsp_hd) {
1427 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1428 FD_SET(tcp_fd, &rfds);
1429 } else {
1430 fd_max = 0;
1431 tcp_fd = -1;
1432 }
c8965800 1433 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1434 rtsp_st = rt->rtsp_streams[i];
1435 if (rtsp_st->rtp_handle) {
1436 /* currently, we cannot probe RTCP handle because of
1437 * blocking restrictions */
1438 fd = url_get_file_handle(rtsp_st->rtp_handle);
1439 if (fd > fd_max)
1440 fd_max = fd;
1441 FD_SET(fd, &rfds);
1442 }
1443 }
1444 tv.tv_sec = 0;
1445 tv.tv_usec = 100 * 1000;
1446 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1447 if (n > 0) {
c8965800 1448 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1449 rtsp_st = rt->rtsp_streams[i];
1450 if (rtsp_st->rtp_handle) {
1451 fd = url_get_file_handle(rtsp_st->rtp_handle);
1452 if (FD_ISSET(fd, &rfds)) {
1453 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1454 if (ret > 0) {
1455 *prtsp_st = rtsp_st;
1456 return ret;
1457 }
1458 }
1459 }
1460 }
1461#if CONFIG_RTSP_DEMUXER
27000636 1462 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1463 RTSPMessageHeader reply;
1464
1465 rtsp_read_reply(s, &reply, NULL, 0);
1466 /* XXX: parse message */
1467 if (rt->state != RTSP_STATE_PLAYING)
1468 return 0;
1469 }
1470#endif
1471 }
1472 }
1473}
1474
8b1ab7bf
FB
1475static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1476 uint8_t *buf, int buf_size)
1617ad97
FB
1477{
1478 RTSPState *rt = s->priv_data;
b6892136 1479 int id, len, i, ret;
1617ad97 1480 RTSPStream *rtsp_st;
1617ad97 1481
b6892136 1482#ifdef DEBUG_RTP_TCP
67c9cd69 1483 dprintf(s, "tcp_read_packet:\n");
b6892136 1484#endif
c8965800
RB
1485redo:
1486 for (;;) {
7e726132
RB
1487 RTSPMessageHeader reply;
1488
1489 ret = rtsp_read_reply(s, &reply, NULL, 1);
1490 if (ret == -1)
8b1ab7bf 1491 return -1;
7e726132 1492 if (ret == 1) /* received '$' */
1617ad97 1493 break;
7e726132 1494 /* XXX: parse message */
fccb1770
RB
1495 if (rt->state != RTSP_STATE_PLAYING)
1496 return 0;
1617ad97 1497 }
0e848977 1498 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1499 if (ret != 3)
8b1ab7bf 1500 return -1;
c8965800 1501 id = buf[0];
80fb8234 1502 len = AV_RB16(buf + 1);
b6892136 1503#ifdef DEBUG_RTP_TCP
67c9cd69 1504 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1505#endif
8b1ab7bf 1506 if (len > buf_size || len < 12)
1617ad97
FB
1507 goto redo;
1508 /* get the data */
0e848977 1509 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1510 if (ret != len)
8b1ab7bf 1511 return -1;
985b05d3 1512 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1513 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1514 return -1;
115329f1 1515
1617ad97 1516 /* find the matching stream */
c8965800 1517 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1518 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1519 if (id >= rtsp_st->interleaved_min &&
1520 id <= rtsp_st->interleaved_max)
1617ad97
FB
1521 goto found;
1522 }
1523 goto redo;
c8965800 1524found:
8b1ab7bf
FB
1525 *prtsp_st = rtsp_st;
1526 return len;
1617ad97
FB
1527}
1528
0e59034e
RB
1529static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1530{
1531 RTSPState *rt = s->priv_data;
1532 int ret, len;
1533 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1534 RTSPStream *rtsp_st;
1535
1536 /* get next frames from the same RTP packet */
1537 if (rt->cur_transport_priv) {
c8965800 1538 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1539 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1540 } else
0e59034e
RB
1541 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1542 if (ret == 0) {
1543 rt->cur_transport_priv = NULL;
1544 return 0;
1545 } else if (ret == 1) {
1546 return 0;
c8965800 1547 } else
0e59034e 1548 rt->cur_transport_priv = NULL;
0e59034e
RB
1549 }
1550
1551 /* read next RTP packet */
1552 redo:
1553 switch(rt->lower_transport) {
1554 default:
1555#if CONFIG_RTSP_DEMUXER
1556 case RTSP_LOWER_TRANSPORT_TCP:
1557 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1558 break;
1559#endif
1560 case RTSP_LOWER_TRANSPORT_UDP:
1561 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1562 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1563 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1564 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1565 break;
1566 }
1567 if (len < 0)
1568 return len;
1569 if (len == 0)
1570 return AVERROR_EOF;
c8965800 1571 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1572 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1573 } else
0e59034e
RB
1574 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1575 if (ret < 0)
1576 goto redo;
c8965800 1577 if (ret == 1)
0e59034e
RB
1578 /* more packets may follow, so we save the RTP context */
1579 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1580
1581 return ret;
1582}
1583
c8965800 1584static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1585{
1586 RTSPState *rt = s->priv_data;
98713182 1587 int ret;
30e79845
RB
1588 RTSPMessageHeader reply1, *reply = &reply1;
1589 char cmd[1024];
8b1ab7bf 1590
572c6a38 1591 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1592 int i;
572c6a38 1593 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1594
572c6a38
RB
1595 for (i = 0; i < s->nb_streams; i++)
1596 cache[i] = s->streams[i]->discard;
1597
1598 if (!rt->need_subscription) {
1599 if (memcmp (cache, rt->real_setup_cache,
1600 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1601 snprintf(cmd, sizeof(cmd),
7eaa646f
RB
1602 "SET_PARAMETER %s RTSP/1.0\r\n"
1603 "Unsubscribe: %s\r\n",
00eb13e0 1604 rt->control_uri, rt->last_subscription);
572c6a38
RB
1605 rtsp_send_cmd(s, cmd, reply, NULL);
1606 if (reply->status_code != RTSP_STATUS_OK)
1607 return AVERROR_INVALIDDATA;
1608 rt->need_subscription = 1;
1609 }
1256d16b 1610 }
1256d16b 1611
572c6a38
RB
1612 if (rt->need_subscription) {
1613 int r, rule_nr, first = 1;
1614
1615 memcpy(rt->real_setup_cache, cache,
1616 sizeof(enum AVDiscard) * s->nb_streams);
1617 rt->last_subscription[0] = 0;
1618
1619 snprintf(cmd, sizeof(cmd),
1620 "SET_PARAMETER %s RTSP/1.0\r\n"
1621 "Subscribe: ",
00eb13e0 1622 rt->control_uri);
572c6a38
RB
1623 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1624 rule_nr = 0;
1625 for (r = 0; r < s->nb_streams; r++) {
1626 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1627 if (s->streams[r]->discard != AVDISCARD_ALL) {
1628 if (!first)
1629 av_strlcat(rt->last_subscription, ",",
1630 sizeof(rt->last_subscription));
1631 ff_rdt_subscribe_rule(
1632 rt->last_subscription,
1633 sizeof(rt->last_subscription), i, rule_nr);
1634 first = 0;
1635 }
1636 rule_nr++;
1637 }
1638 }
1639 }
1640 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1641 rtsp_send_cmd(s, cmd, reply, NULL);
1642 if (reply->status_code != RTSP_STATUS_OK)
1643 return AVERROR_INVALIDDATA;
1644 rt->need_subscription = 0;
1645
1646 if (rt->state == RTSP_STATE_PLAYING)
1647 rtsp_read_play (s);
1648 }
1256d16b
RB
1649 }
1650
d7250724 1651 ret = rtsp_fetch_packet(s, pkt);
c8965800 1652 if (ret < 0)
98713182 1653 return ret;
30e79845
RB
1654
1655 /* send dummy request to keep TCP connection alive */
1656 if ((rt->server_type == RTSP_SERVER_WMS ||
1657 rt->server_type == RTSP_SERVER_REAL) &&
1658 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1659 if (rt->server_type == RTSP_SERVER_WMS) {
1660 snprintf(cmd, sizeof(cmd) - 1,
1661 "GET_PARAMETER %s RTSP/1.0\r\n",
00eb13e0 1662 rt->control_uri);
2e13ecfe 1663 rtsp_send_cmd_async(s, cmd);
30e79845 1664 } else {
2e13ecfe 1665 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
30e79845
RB
1666 }
1667 }
1668
8b1ab7bf 1669 return 0;
1617ad97
FB
1670}
1671
ff762d6e
FB
1672/* pause the stream */
1673static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1674{
ff762d6e 1675 RTSPState *rt = s->priv_data;
a9e534d5 1676 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1677 char cmd[1024];
1678
b7b8fc34 1679 rt = s->priv_data;
115329f1 1680
ff762d6e
FB
1681 if (rt->state != RTSP_STATE_PLAYING)
1682 return 0;
2e889ae4 1683 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1684 snprintf(cmd, sizeof(cmd),
1685 "PAUSE %s RTSP/1.0\r\n",
00eb13e0 1686 rt->control_uri);
99b2ac07
RB
1687 rtsp_send_cmd(s, cmd, reply, NULL);
1688 if (reply->status_code != RTSP_STATUS_OK) {
1689 return -1;
1690 }
1256d16b 1691 }
5f86057f
RB
1692 rt->state = RTSP_STATE_PAUSED;
1693 return 0;
b7b8fc34
FB
1694}
1695
115329f1 1696static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1697 int64_t timestamp, int flags)
ff762d6e
FB
1698{
1699 RTSPState *rt = s->priv_data;
115329f1 1700
c8965800
RB
1701 rt->seek_timestamp = av_rescale_q(timestamp,
1702 s->streams[stream_index]->time_base,
1703 AV_TIME_BASE_Q);
ff762d6e
FB
1704 switch(rt->state) {
1705 default:
1706 case RTSP_STATE_IDLE:
1707 break;
1708 case RTSP_STATE_PLAYING:
ec606b36
LB
1709 if (rtsp_read_pause(s) != 0)
1710 return -1;
1711 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1712 if (rtsp_read_play(s) != 0)
1713 return -1;
1714 break;
1715 case RTSP_STATE_PAUSED:
1716 rt->state = RTSP_STATE_IDLE;
1717 break;
1718 }
1719 return 0;
1720}
1721
1617ad97
FB
1722static int rtsp_read_close(AVFormatContext *s)
1723{
1724 RTSPState *rt = s->priv_data;
1617ad97
FB
1725 char cmd[1024];
1726
b6892136 1727#if 0
1617ad97 1728 /* NOTE: it is valid to flush the buffer here */
90abbdba 1729 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1730 url_fclose(&rt->rtsp_gb);
1731 }
b6892136 1732#endif
115329f1 1733 snprintf(cmd, sizeof(cmd),
b6892136 1734 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97 1735 s->filename);
2e13ecfe 1736 rtsp_send_cmd_async(s, cmd);
1617ad97 1737
8b1ab7bf 1738 rtsp_close_streams(rt);
1617ad97
FB
1739 url_close(rt->rtsp_hd);
1740 return 0;
1741}
1742
d2a067d1 1743AVInputFormat rtsp_demuxer = {
1617ad97 1744 "rtsp",
bde15e74 1745 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1746 sizeof(RTSPState),
1747 rtsp_probe,
1748 rtsp_read_header,
1749 rtsp_read_packet,
1750 rtsp_read_close,
ff762d6e 1751 rtsp_read_seek,
bb76a117 1752 .flags = AVFMT_NOFILE,
ff762d6e
FB
1753 .read_play = rtsp_read_play,
1754 .read_pause = rtsp_read_pause,
1617ad97 1755};
96862926 1756#endif
1617ad97 1757
cb1fdc61 1758static int sdp_probe(AVProbeData *p1)
93ced3e8 1759{
0e1ceacd 1760 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1761
1762 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1763 while (p < p_end && *p != '\0') {
c8965800
RB
1764 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1765 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1766 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1767
c8965800 1768 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1769 if (++p >= p_end)
cb1fdc61 1770 break;
cb1fdc61
FB
1771 if (*p == '\r')
1772 p++;
1773 }
93ced3e8
FB
1774 return 0;
1775}
1776
1777#define SDP_MAX_SIZE 8192
1778
c8965800 1779static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1780{
8b1ab7bf 1781 RTSPState *rt = s->priv_data;
93ced3e8
FB
1782 RTSPStream *rtsp_st;
1783 int size, i, err;
1784 char *content;
1785 char url[1024];
1786
1787 /* read the whole sdp file */
1788 /* XXX: better loading */
1789 content = av_malloc(SDP_MAX_SIZE);
899681cd 1790 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1791 if (size <= 0) {
1792 av_free(content);
1793 return AVERROR_INVALIDDATA;
1794 }
1795 content[size] ='\0';
1796
1797 sdp_parse(s, content);
1798 av_free(content);
1799
1800 /* open each RTP stream */
c8965800 1801 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1802 rtsp_st = rt->rtsp_streams[i];
115329f1 1803
d2bf42be 1804 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1805 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1806 rtsp_st->sdp_port,
d2bf42be 1807 rtsp_st->sdp_port,
93ced3e8 1808 rtsp_st->sdp_ttl);
dbf30963 1809 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1810 err = AVERROR_INVALIDDATA;
1811 goto fail;
1812 }
ee0cb67f 1813 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1814 goto fail;
93ced3e8
FB
1815 }
1816 return 0;
c8965800 1817fail:
8b1ab7bf 1818 rtsp_close_streams(rt);
93ced3e8
FB
1819 return err;
1820}
1821
93ced3e8
FB
1822static int sdp_read_close(AVFormatContext *s)
1823{
8b1ab7bf
FB
1824 RTSPState *rt = s->priv_data;
1825 rtsp_close_streams(rt);
93ced3e8
FB
1826 return 0;
1827}
1828
ff70e601 1829AVInputFormat sdp_demuxer = {
93ced3e8 1830 "sdp",
bde15e74 1831 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1832 sizeof(RTSPState),
1833 sdp_probe,
1834 sdp_read_header,
d7250724 1835 rtsp_fetch_packet,
93ced3e8
FB
1836 sdp_read_close,
1837};