RTSP muxer: Create the SDP with the numerical IP of the peer
[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
f9337897 22#include "libavutil/base64.h"
245976da 23#include "libavutil/avstring.h"
6a5d31ac 24#include "libavutil/intreadwrite.h"
1617ad97
FB
25#include "avformat.h"
26
db0ed93e 27#include <sys/time.h>
b250f9c6 28#if HAVE_SYS_SELECT_H
933bd8e2 29#include <sys/select.h>
6ad1c9c9 30#endif
ea452b54 31#include <strings.h>
42572ef5 32#include "network.h"
cbfa66d0 33#include "os_support.h"
c971ff19 34#include "rtsp.h"
1617ad97 35
302879cb 36#include "rtpdec.h"
e9dea59f 37#include "rdt.h"
f65919af
MS
38#include "rtpdec_asf.h"
39#include "rtpdec_vorbis.h"
4934884a 40
1617ad97 41//#define DEBUG
b6892136 42//#define DEBUG_RTP_TCP
1617ad97 43
c482500f 44#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 45int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 46#endif
85fb7b34 47
1ef36a70 48#define SPACE_CHARS " \t\r\n"
da1e126e
RB
49/* we use memchr() instead of strchr() here because strchr() will return
50 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
51#define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
1617ad97
FB
52static void skip_spaces(const char **pp)
53{
54 const char *p;
55 p = *pp;
56 while (redir_isspace(*p))
57 p++;
58 *pp = p;
59}
60
1ef36a70
RB
61static void get_word_until_chars(char *buf, int buf_size,
62 const char *sep, const char **pp)
1617ad97
FB
63{
64 const char *p;
65 char *q;
66
67 p = *pp;
68 skip_spaces(&p);
69 q = buf;
70 while (!strchr(sep, *p) && *p != '\0') {
71 if ((q - buf) < buf_size - 1)
72 *q++ = *p;
73 p++;
74 }
75 if (buf_size > 0)
76 *q = '\0';
77 *pp = p;
78}
79
1ef36a70
RB
80static void get_word_sep(char *buf, int buf_size, const char *sep,
81 const char **pp)
1617ad97 82{
1ef36a70
RB
83 if (**pp == '/') (*pp)++;
84 get_word_until_chars(buf, buf_size, sep, pp);
85}
1617ad97 86
1ef36a70
RB
87static void get_word(char *buf, int buf_size, const char **pp)
88{
89 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
1617ad97
FB
90}
91
c8965800 92/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
8f3c87f3
RB
93static int sdp_parse_rtpmap(AVFormatContext *s,
94 AVCodecContext *codec, RTSPStream *rtsp_st,
c8965800 95 int payload_type, const char *p)
93ced3e8
FB
96{
97 char buf[256];
d1ccf0e0
RD
98 int i;
99 AVCodec *c;
7b49ce2e 100 const char *c_name;
93ced3e8 101
d1ccf0e0 102 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
9d50d396
RB
103 * see if we can handle this kind of payload.
104 * The space should normally not be there but some Real streams or
105 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
106 * have a trailing space. */
107 get_word_sep(buf, sizeof(buf), "/ ", &p);
d1ccf0e0 108 if (payload_type >= RTP_PT_PRIVATE) {
c8965800
RB
109 RTPDynamicProtocolHandler *handler;
110 for (handler = RTPFirstDynamicPayloadHandler;
111 handler; handler = handler->next) {
112 if (!strcasecmp(buf, handler->enc_name) &&
113 codec->codec_type == handler->codec_type) {
114 codec->codec_id = handler->codec_id;
115 rtsp_st->dynamic_handler = handler;
116 if (handler->open)
117 rtsp_st->dynamic_protocol_context = handler->open();
d1ccf0e0
RD
118 break;
119 }
4934884a 120 }
93ced3e8 121 } else {
c8965800
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122 /* We are in a standard case
123 * (from http://www.iana.org/assignments/rtp-parameters). */
d1ccf0e0 124 /* search into AVRtpPayloadTypes[] */
7ed19d7f 125 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
126 }
127
128 c = avcodec_find_decoder(codec->codec_id);
129 if (c && c->name)
7b49ce2e 130 c_name = c->name;
d1ccf0e0 131 else
170870b7 132 c_name = "(null)";
d1ccf0e0 133
7515ed0c
RB
134 get_word_sep(buf, sizeof(buf), "/", &p);
135 i = atoi(buf);
136 switch (codec->codec_type) {
137 case CODEC_TYPE_AUDIO:
138 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
139 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
140 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
141 if (i > 0) {
142 codec->sample_rate = i;
143 get_word_sep(buf, sizeof(buf), "/", &p);
144 i = atoi(buf);
145 if (i > 0)
146 codec->channels = i;
147 // TODO: there is a bug here; if it is a mono stream, and
148 // less than 22000Hz, faad upconverts to stereo and twice
149 // the frequency. No problem, but the sample rate is being
150 // set here by the sdp line. Patch on its way. (rdm)
d1ccf0e0 151 }
7515ed0c
RB
152 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
153 codec->sample_rate);
154 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
155 codec->channels);
156 break;
157 case CODEC_TYPE_VIDEO:
158 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
159 break;
160 default:
161 break;
162 }
163 return 0;
93ced3e8
FB
164}
165
c8965800 166/* return the length and optionally the data */
93ced3e8
FB
167static int hex_to_data(uint8_t *data, const char *p)
168{
169 int c, len, v;
170
171 len = 0;
172 v = 1;
c8965800 173 for (;;) {
93ced3e8 174 skip_spaces(&p);
6a8c8b36 175 if (*p == '\0')
93ced3e8 176 break;
c8965800 177 c = toupper((unsigned char) *p++);
93ced3e8
FB
178 if (c >= '0' && c <= '9')
179 c = c - '0';
180 else if (c >= 'A' && c <= 'F')
181 c = c - 'A' + 10;
182 else
183 break;
184 v = (v << 4) | c;
185 if (v & 0x100) {
186 if (data)
187 data[len] = v;
188 len++;
189 v = 1;
190 }
191 }
192 return len;
193}
194
e6327fba
RB
195static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
196 char *attr, char *value)
d1ccf0e0
RD
197{
198 switch (codec->codec_id) {
c8965800
RB
199 case CODEC_ID_MPEG4:
200 case CODEC_ID_AAC:
201 if (!strcmp(attr, "config")) {
202 /* decode the hexa encoded parameter */
203 int len = hex_to_data(NULL, value);
204 if (codec->extradata)
205 av_free(codec->extradata);
206 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
207 if (!codec->extradata)
208 return;
209 codec->extradata_size = len;
210 hex_to_data(codec->extradata, value);
211 }
212 break;
213 case CODEC_ID_VORBIS:
214 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
215 break;
216 default:
217 break;
d1ccf0e0
RD
218 }
219 return;
220}
221
644e7acb 222typedef struct {
7b49ce2e 223 const char *str;
c8965800
RB
224 uint16_t type;
225 uint32_t offset;
644e7acb 226} AttrNameMap;
d1ccf0e0
RD
227
228/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
229#define ATTR_NAME_TYPE_INT 0
230#define ATTR_NAME_TYPE_STR 1
644e7acb 231static const AttrNameMap attr_names[]=
d1ccf0e0 232{
c8965800
RB
233 { "SizeLength", ATTR_NAME_TYPE_INT,
234 offsetof(RTPPayloadData, sizelength) },
235 { "IndexLength", ATTR_NAME_TYPE_INT,
236 offsetof(RTPPayloadData, indexlength) },
237 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
238 offsetof(RTPPayloadData, indexdeltalength) },
239 { "profile-level-id", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, profile_level_id) },
241 { "StreamType", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, streamtype) },
243 { "mode", ATTR_NAME_TYPE_STR,
244 offsetof(RTPPayloadData, mode) },
245 { NULL, -1, -1 },
d1ccf0e0
RD
246};
247
c8965800
RB
248/* parse the attribute line from the fmtp a line of an sdp resonse. This
249 * is broken out as a function because it is used in rtp_h264.c, which is
250 * forthcoming. */
3307e6ea 251int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
93993933 252 char *value, int value_size)
d0deedcb
RM
253{
254 skip_spaces(p);
c8965800 255 if (**p) {
d0deedcb
RM
256 get_word_sep(attr, attr_size, "=", p);
257 if (**p == '=')
258 (*p)++;
259 get_word_sep(value, value_size, ";", p);
260 if (**p == ';')
261 (*p)++;
262 return 1;
263 }
264 return 0;
265}
266
d1ccf0e0
RD
267/* parse a SDP line and save stream attributes */
268static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
269{
270 char attr[256];
373afbaf
RB
271 /* Vorbis setup headers can be up to 12KB and are sent base64
272 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
273 char value[16384];
d1ccf0e0 274 int i;
d1ccf0e0 275 RTSPStream *rtsp_st = st->priv_data;
01f4895c 276 AVCodecContext *codec = st->codec;
be73a544 277 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
278
279 /* loop on each attribute */
3307e6ea 280 while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
93993933 281 value, sizeof(value))) {
c8965800
RB
282 /* grab the codec extra_data from the config parameter of the fmtp
283 * line */
e6327fba
RB
284 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
285 attr, value);
d1ccf0e0
RD
286 /* Looking for a known attribute */
287 for (i = 0; attr_names[i].str; ++i) {
288 if (!strcasecmp(attr, attr_names[i].str)) {
c8965800
RB
289 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
290 *(int *)((char *)rtp_payload_data +
291 attr_names[i].offset) = atoi(value);
292 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
293 *(char **)((char *)rtp_payload_data +
294 attr_names[i].offset) = av_strdup(value);
bb270c08 295 }
93ced3e8 296 }
93ced3e8
FB
297 }
298}
299
debe86bf 300/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
31693e00
RM
301 * and end time.
302 * Used for seeking in the rtp stream.
303 */
304static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
305{
306 char buf[256];
307
308 skip_spaces(&p);
f7d78f36 309 if (!av_stristart(p, "npt=", &p))
31693e00
RM
310 return;
311
312 *start = AV_NOPTS_VALUE;
313 *end = AV_NOPTS_VALUE;
314
315 get_word_sep(buf, sizeof(buf), "-", &p);
316 *start = parse_date(buf, 1);
317 if (*p == '-') {
318 p++;
319 get_word_sep(buf, sizeof(buf), "-", &p);
320 *end = parse_date(buf, 1);
321 }
322// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
323// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
324}
325
93ced3e8
FB
326typedef struct SDPParseState {
327 /* SDP only */
328 struct in_addr default_ip;
c8965800
RB
329 int default_ttl;
330 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
331} SDPParseState;
332
333static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
334 int letter, const char *buf)
335{
8b1ab7bf 336 RTSPState *rt = s->priv_data;
1617ad97
FB
337 char buf1[64], st_type[64];
338 const char *p;
fb65d2ca
DP
339 enum CodecType codec_type;
340 int payload_type, i;
1617ad97
FB
341 AVStream *st;
342 RTSPStream *rtsp_st;
93ced3e8
FB
343 struct in_addr sdp_ip;
344 int ttl;
345
67c9cd69 346 dprintf(s, "sdp: %c='%s'\n", letter, buf);
1617ad97
FB
347
348 p = buf;
cb760a47
RB
349 if (s1->skip_media && letter != 'm')
350 return;
c8965800 351 switch (letter) {
93ced3e8
FB
352 case 'c':
353 get_word(buf1, sizeof(buf1), &p);
354 if (strcmp(buf1, "IN") != 0)
355 return;
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IP4") != 0)
358 return;
359 get_word_sep(buf1, sizeof(buf1), "/", &p);
ac11d562 360 if (ff_inet_aton(buf1, &sdp_ip) == 0)
93ced3e8
FB
361 return;
362 ttl = 16;
363 if (*p == '/') {
364 p++;
365 get_word_sep(buf1, sizeof(buf1), "/", &p);
366 ttl = atoi(buf1);
367 }
368 if (s->nb_streams == 0) {
369 s1->default_ip = sdp_ip;
370 s1->default_ttl = ttl;
371 } else {
372 st = s->streams[s->nb_streams - 1];
373 rtsp_st = st->priv_data;
374 rtsp_st->sdp_ip = sdp_ip;
375 rtsp_st->sdp_ttl = ttl;
376 }
377 break;
1617ad97 378 case 's':
da61e413 379 av_metadata_set(&s->metadata, "title", p);
1617ad97
FB
380 break;
381 case 'i':
382 if (s->nb_streams == 0) {
da61e413 383 av_metadata_set(&s->metadata, "comment", p);
1617ad97
FB
384 break;
385 }
386 break;
387 case 'm':
388 /* new stream */
cb760a47 389 s1->skip_media = 0;
1617ad97
FB
390 get_word(st_type, sizeof(st_type), &p);
391 if (!strcmp(st_type, "audio")) {
392 codec_type = CODEC_TYPE_AUDIO;
393 } else if (!strcmp(st_type, "video")) {
394 codec_type = CODEC_TYPE_VIDEO;
090438cc
RB
395 } else if (!strcmp(st_type, "application")) {
396 codec_type = CODEC_TYPE_DATA;
1617ad97 397 } else {
cb760a47 398 s1->skip_media = 1;
1617ad97
FB
399 return;
400 }
1617ad97
FB
401 rtsp_st = av_mallocz(sizeof(RTSPStream));
402 if (!rtsp_st)
403 return;
8b1ab7bf
FB
404 rtsp_st->stream_index = -1;
405 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
406
407 rtsp_st->sdp_ip = s1->default_ip;
408 rtsp_st->sdp_ttl = s1->default_ttl;
409
93ced3e8
FB
410 get_word(buf1, sizeof(buf1), &p); /* port */
411 rtsp_st->sdp_port = atoi(buf1);
412
413 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 414
93ced3e8
FB
415 /* XXX: handle list of formats */
416 get_word(buf1, sizeof(buf1), &p); /* format list */
417 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 418
7ed19d7f 419 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
420 /* no corresponding stream */
421 } else {
422 st = av_new_stream(s, 0);
423 if (!st)
424 return;
425 st->priv_data = rtsp_st;
426 rtsp_st->stream_index = st->index;
01f4895c 427 st->codec->codec_type = codec_type;
d1ccf0e0 428 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 429 /* if standard payload type, we can find the codec right now */
bf6d9818 430 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
431 }
432 }
1617ad97 433 /* put a default control url */
00eb13e0 434 av_strlcpy(rtsp_st->control_url, rt->control_uri,
c8965800 435 sizeof(rtsp_st->control_url));
1617ad97
FB
436 break;
437 case 'a':
00eb13e0
AS
438 if (av_strstart(p, "control:", &p)) {
439 if (s->nb_streams == 0) {
440 if (!strncmp(p, "rtsp://", 7))
441 av_strlcpy(rt->control_uri, p,
442 sizeof(rt->control_uri));
443 } else {
1617ad97
FB
444 char proto[32];
445 /* get the control url */
446 st = s->streams[s->nb_streams - 1];
447 rtsp_st = st->priv_data;
115329f1 448
1617ad97 449 /* XXX: may need to add full url resolution */
c5c6e67c 450 ff_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
f984dcf6 451 NULL, NULL, 0, p);
1617ad97
FB
452 if (proto[0] == '\0') {
453 /* relative control URL */
00eb13e0 454 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
c8965800
RB
455 av_strlcat(rtsp_st->control_url, "/",
456 sizeof(rtsp_st->control_url));
457 av_strlcat(rtsp_st->control_url, p,
458 sizeof(rtsp_st->control_url));
459 } else
460 av_strlcpy(rtsp_st->control_url, p,
461 sizeof(rtsp_st->control_url));
00eb13e0 462 }
83d14c85 463 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 464 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 465 get_word(buf1, sizeof(buf1), &p);
93ced3e8 466 payload_type = atoi(buf1);
83d14c85 467 st = s->streams[s->nb_streams - 1];
ff16f551 468 rtsp_st = st->priv_data;
8f3c87f3 469 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
f7d78f36 470 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 471 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 472 get_word(buf1, sizeof(buf1), &p);
93ced3e8 473 payload_type = atoi(buf1);
c8965800
RB
474 for (i = 0; i < s->nb_streams; i++) {
475 st = s->streams[i];
93ced3e8
FB
476 rtsp_st = st->priv_data;
477 if (rtsp_st->sdp_payload_type == payload_type) {
c8965800
RB
478 if (!(rtsp_st->dynamic_handler &&
479 rtsp_st->dynamic_handler->parse_sdp_a_line &&
480 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
481 i, rtsp_st->dynamic_protocol_context, buf)))
ed787542 482 sdp_parse_fmtp(st, p);
93ced3e8
FB
483 }
484 }
c8965800 485 } else if (av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
486 // let dynamic protocol handlers have a stab at the line.
487 get_word(buf1, sizeof(buf1), &p);
488 payload_type = atoi(buf1);
c8965800
RB
489 for (i = 0; i < s->nb_streams; i++) {
490 st = s->streams[i];
d0deedcb 491 rtsp_st = st->priv_data;
c8965800
RB
492 if (rtsp_st->sdp_payload_type == payload_type &&
493 rtsp_st->dynamic_handler &&
494 rtsp_st->dynamic_handler->parse_sdp_a_line)
495 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
496 rtsp_st->dynamic_protocol_context, buf);
d0deedcb 497 }
c8965800 498 } else if (av_strstart(p, "range:", &p)) {
31693e00
RM
499 int64_t start, end;
500
501 // this is so that seeking on a streamed file can work.
502 rtsp_parse_range_npt(p, &start, &end);
c8965800
RB
503 s->start_time = start;
504 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
505 s->duration = (end == AV_NOPTS_VALUE) ?
506 AV_NOPTS_VALUE : end - start;
119b4668
RB
507 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
508 if (atoi(p) == 1)
509 rt->transport = RTSP_TRANSPORT_RDT;
1a30d541
RB
510 } else {
511 if (rt->server_type == RTSP_SERVER_WMS)
512 ff_wms_parse_sdp_a_line(s, p);
513 if (s->nb_streams > 0) {
c4a3d032
RB
514 if (rt->server_type == RTSP_SERVER_REAL)
515 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
516
517 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
518 if (rtsp_st->dynamic_handler &&
519 rtsp_st->dynamic_handler->parse_sdp_a_line)
c8965800
RB
520 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
521 s->nb_streams - 1,
c4a3d032 522 rtsp_st->dynamic_protocol_context, buf);
1a30d541 523 }
1617ad97
FB
524 }
525 break;
526 }
527}
528
5c91a675 529static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
530{
531 const char *p;
532 int letter;
9211bcdd
RB
533 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
534 * contain long SDP lines containing complete ASF Headers (several
535 * kB) or arrays of MDPR (RM stream descriptor) headers plus
536 * "rulebooks" describing their properties. Therefore, the SDP line
373afbaf
RB
537 * buffer is large.
538 *
539 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
540 char buf[16384], *q;
93ced3e8 541 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 542
93ced3e8 543 memset(s1, 0, sizeof(SDPParseState));
1617ad97 544 p = content;
c8965800 545 for (;;) {
1617ad97
FB
546 skip_spaces(&p);
547 letter = *p;
548 if (letter == '\0')
549 break;
550 p++;
551 if (*p != '=')
552 goto next_line;
553 p++;
554 /* get the content */
555 q = buf;
b6892136 556 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
557 if ((q - buf) < sizeof(buf) - 1)
558 *q++ = *p;
559 p++;
560 }
561 *q = '\0';
93ced3e8 562 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
563 next_line:
564 while (*p != '\n' && *p != '\0')
565 p++;
566 if (*p == '\n')
567 p++;
568 }
569 return 0;
570}
571
1ced9da3 572/* close and free RTSP streams */
3307e6ea 573void ff_rtsp_close_streams(AVFormatContext *s)
1ced9da3 574{
52aa4338 575 RTSPState *rt = s->priv_data;
1ced9da3
LA
576 int i;
577 RTSPStream *rtsp_st;
578
c8965800 579 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1ced9da3
LA
580 rtsp_st = rt->rtsp_streams[i];
581 if (rtsp_st) {
582 if (rtsp_st->transport_priv) {
fd450a51
MS
583 if (s->oformat) {
584 AVFormatContext *rtpctx = rtsp_st->transport_priv;
585 av_write_trailer(rtpctx);
586 url_fclose(rtpctx->pb);
f86f6656
MS
587 av_metadata_free(&rtpctx->streams[0]->metadata);
588 av_metadata_free(&rtpctx->metadata);
fd450a51
MS
589 av_free(rtpctx->streams[0]);
590 av_free(rtpctx);
591 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
592 ff_rdt_parse_close(rtsp_st->transport_priv);
593 else
594 rtp_parse_close(rtsp_st->transport_priv);
595 }
596 if (rtsp_st->rtp_handle)
597 url_close(rtsp_st->rtp_handle);
598 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
599 rtsp_st->dynamic_handler->close(
600 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
601 }
602 }
603 av_free(rt->rtsp_streams);
604 if (rt->asf_ctx) {
605 av_close_input_stream (rt->asf_ctx);
606 rt->asf_ctx = NULL;
607 }
608 av_freep(&rt->auth_b64);
609}
610
fd450a51
MS
611static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st, URLContext *handle) {
612 AVFormatContext *rtpctx;
613 int ret;
614 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
615
616 if (!rtp_format)
617 return NULL;
618
619 /* Allocate an AVFormatContext for each output stream */
620 rtpctx = avformat_alloc_context();
621 if (!rtpctx)
622 return NULL;
623
624 rtpctx->oformat = rtp_format;
625 if (!av_new_stream(rtpctx, 0)) {
626 av_free(rtpctx);
627 return NULL;
628 }
629 /* Copy the max delay setting; the rtp muxer reads this. */
630 rtpctx->max_delay = s->max_delay;
631 /* Copy other stream parameters. */
632 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
633
634 /* Remove the local codec, link to the original codec
635 * context instead, to give the rtp muxer access to
636 * codec parameters. */
637 av_free(rtpctx->streams[0]->codec);
638 rtpctx->streams[0]->codec = st->codec;
639
640 url_fdopen(&rtpctx->pb, handle);
641 ret = av_write_header(rtpctx);
642
643 if (ret) {
644 url_fclose(rtpctx->pb);
645 av_free(rtpctx->streams[0]);
646 av_free(rtpctx);
647 return NULL;
648 }
649
650 /* Copy the RTP AVStream timebase back to the original AVStream */
651 st->time_base = rtpctx->streams[0]->time_base;
652 return rtpctx;
653}
654
c8965800 655static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
656{
657 RTSPState *rt = s->priv_data;
658 AVStream *st = NULL;
659
660 /* open the RTP context */
661 if (rtsp_st->stream_index >= 0)
662 st = s->streams[rtsp_st->stream_index];
663 if (!st)
664 s->ctx_flags |= AVFMTCTX_NOHEADER;
665
fd450a51
MS
666 if (s->oformat) {
667 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
668 /* Ownage of rtp_handle is passed to the rtp mux context */
669 rtsp_st->rtp_handle = NULL;
670 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
671 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
672 rtsp_st->dynamic_protocol_context,
673 rtsp_st->dynamic_handler);
674 else
675 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
676 rtsp_st->sdp_payload_type,
677 &rtsp_st->rtp_payload_data);
678
679 if (!rtsp_st->transport_priv) {
680 return AVERROR(ENOMEM);
681 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 682 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
683 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
684 rtsp_st->dynamic_protocol_context,
685 rtsp_st->dynamic_handler);
686 }
687 }
688
689 return 0;
690}
691
6f5a3d0a 692#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
1ced9da3
LA
693static int rtsp_probe(AVProbeData *p)
694{
695 if (av_strstart(p->filename, "rtsp:", NULL))
696 return AVPROBE_SCORE_MAX;
697 return 0;
698}
699
1617ad97
FB
700static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
701{
702 const char *p;
703 int v;
704
705 p = *pp;
706 skip_spaces(&p);
707 v = strtol(p, (char **)&p, 10);
708 if (*p == '-') {
709 p++;
710 *min_ptr = v;
711 v = strtol(p, (char **)&p, 10);
712 *max_ptr = v;
713 } else {
714 *min_ptr = v;
715 *max_ptr = v;
716 }
717 *pp = p;
718}
719
720/* XXX: only one transport specification is parsed */
a9e534d5 721static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
722{
723 char transport_protocol[16];
724 char profile[16];
725 char lower_transport[16];
726 char parameter[16];
727 RTSPTransportField *th;
728 char buf[256];
115329f1 729
1617ad97 730 reply->nb_transports = 0;
115329f1 731
c8965800 732 for (;;) {
1617ad97
FB
733 skip_spaces(&p);
734 if (*p == '\0')
735 break;
736
737 th = &reply->transports[reply->nb_transports];
738
115329f1 739 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 740 "/", &p);
e1502118 741 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
742 get_word_sep(profile, sizeof(profile), "/;,", &p);
743 lower_transport[0] = '\0';
744 /* rtp/avp/<protocol> */
745 if (*p == '/') {
7ecc634e
LB
746 get_word_sep(lower_transport, sizeof(lower_transport),
747 ";,", &p);
119b4668
RB
748 }
749 th->transport = RTSP_TRANSPORT_RTP;
750 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
751 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 752 /* x-pn-tng/<protocol> */
e1502118
LB
753 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
754 profile[0] = '\0';
119b4668 755 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 756 }
b6892136 757 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 758 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 759 else
90abbdba 760 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 761
1617ad97
FB
762 if (*p == ';')
763 p++;
764 /* get each parameter */
765 while (*p != '\0' && *p != ',') {
766 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
767 if (!strcmp(parameter, "port")) {
768 if (*p == '=') {
769 p++;
770 rtsp_parse_range(&th->port_min, &th->port_max, &p);
771 }
772 } else if (!strcmp(parameter, "client_port")) {
773 if (*p == '=') {
774 p++;
115329f1 775 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
776 &th->client_port_max, &p);
777 }
778 } else if (!strcmp(parameter, "server_port")) {
779 if (*p == '=') {
780 p++;
115329f1 781 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
782 &th->server_port_max, &p);
783 }
784 } else if (!strcmp(parameter, "interleaved")) {
785 if (*p == '=') {
786 p++;
115329f1 787 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
788 &th->interleaved_max, &p);
789 }
790 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
791 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
792 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
793 } else if (!strcmp(parameter, "ttl")) {
794 if (*p == '=') {
795 p++;
796 th->ttl = strtol(p, (char **)&p, 10);
797 }
798 } else if (!strcmp(parameter, "destination")) {
799 struct in_addr ipaddr;
800
801 if (*p == '=') {
802 p++;
803 get_word_sep(buf, sizeof(buf), ";,", &p);
ac11d562 804 if (ff_inet_aton(buf, &ipaddr))
1617ad97
FB
805 th->destination = ntohl(ipaddr.s_addr);
806 }
807 }
808 while (*p != ';' && *p != '\0' && *p != ',')
809 p++;
810 if (*p == ';')
811 p++;
812 }
813 if (*p == ',')
814 p++;
815
816 reply->nb_transports++;
817 }
818}
819
3307e6ea 820void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
821{
822 const char *p;
823
824 /* NOTE: we do case independent match for broken servers */
825 p = buf;
f7d78f36 826 if (av_stristart(p, "Session:", &p)) {
30e79845 827 int t;
1617ad97 828 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
829 if (av_stristart(p, ";timeout=", &p) &&
830 (t = strtol(p, NULL, 10)) > 0) {
831 reply->timeout = t;
832 }
f7d78f36 833 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 834 reply->content_length = strtol(p, NULL, 10);
f7d78f36 835 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 836 rtsp_parse_transport(reply, p);
f7d78f36 837 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 838 reply->seq = strtol(p, NULL, 10);
f7d78f36 839 } else if (av_stristart(p, "Range:", &p)) {
31693e00 840 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
841 } else if (av_stristart(p, "RealChallenge1:", &p)) {
842 skip_spaces(&p);
843 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
844 } else if (av_stristart(p, "Server:", &p)) {
845 skip_spaces(&p);
846 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
847 } else if (av_stristart(p, "Notice:", &p) ||
848 av_stristart(p, "X-Notice:", &p)) {
849 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
850 } else if (av_stristart(p, "Location:", &p)) {
851 skip_spaces(&p);
852 av_strlcpy(reply->location, p , sizeof(reply->location));
1617ad97
FB
853 }
854}
855
b7b8fc34
FB
856/* skip a RTP/TCP interleaved packet */
857static void rtsp_skip_packet(AVFormatContext *s)
858{
859 RTSPState *rt = s->priv_data;
860 int ret, len, len1;
861 uint8_t buf[1024];
862
0e848977 863 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
864 if (ret != 3)
865 return;
80fb8234 866 len = AV_RB16(buf + 1);
67c9cd69
BC
867
868 dprintf(s, "skipping RTP packet len=%d\n", len);
869
b7b8fc34
FB
870 /* skip payload */
871 while (len > 0) {
872 len1 = len;
873 if (len1 > sizeof(buf))
874 len1 = sizeof(buf);
0e848977 875 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
876 if (ret != len1)
877 return;
878 len -= len1;
879 }
880}
1617ad97 881
3307e6ea 882int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
93993933
MS
883 unsigned char **content_ptr,
884 int return_on_interleaved_data)
1617ad97
FB
885{
886 RTSPState *rt = s->priv_data;
887 char buf[4096], buf1[1024], *q;
888 unsigned char ch;
889 const char *p;
7e726132 890 int ret, content_length, line_count = 0;
1617ad97
FB
891 unsigned char *content = NULL;
892
d541a7d2 893 memset(reply, 0, sizeof(*reply));
1617ad97 894
1617ad97 895 /* parse reply (XXX: use buffers) */
1617ad97 896 rt->last_reply[0] = '\0';
c8965800 897 for (;;) {
1617ad97 898 q = buf;
c8965800 899 for (;;) {
0e848977 900 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 901#ifdef DEBUG_RTP_TCP
67c9cd69 902 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
903#endif
904 if (ret != 1)
905 return -1;
1617ad97
FB
906 if (ch == '\n')
907 break;
b7b8fc34
FB
908 if (ch == '$') {
909 /* XXX: only parse it if first char on line ? */
7e726132
RB
910 if (return_on_interleaved_data) {
911 return 1;
912 } else
b7b8fc34
FB
913 rtsp_skip_packet(s);
914 } else if (ch != '\r') {
1617ad97
FB
915 if ((q - buf) < sizeof(buf) - 1)
916 *q++ = ch;
917 }
918 }
919 *q = '\0';
67c9cd69
BC
920
921 dprintf(s, "line='%s'\n", buf);
922
1617ad97
FB
923 /* test if last line */
924 if (buf[0] == '\0')
925 break;
926 p = buf;
927 if (line_count == 0) {
928 /* get reply code */
929 get_word(buf1, sizeof(buf1), &p);
930 get_word(buf1, sizeof(buf1), &p);
931 reply->status_code = atoi(buf1);
932 } else {
3307e6ea 933 ff_rtsp_parse_line(reply, p);
75e61b0e
MR
934 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
935 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
936 }
937 line_count++;
938 }
115329f1 939
1617ad97 940 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 941 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 942
1617ad97
FB
943 content_length = reply->content_length;
944 if (content_length > 0) {
945 /* leave some room for a trailing '\0' (useful for simple parsing) */
946 content = av_malloc(content_length + 1);
0e848977 947 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
948 content[content_length] = '\0';
949 }
950 if (content_ptr)
951 *content_ptr = content;
e2e2e7dd
AB
952 else
953 av_free(content);
7e726132 954
fccb1770
RB
955 /* EOS */
956 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
957 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 958 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 959 rt->state = RTSP_STATE_IDLE;
c8965800 960 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 961 return AVERROR(EIO); /* data or server error */
c8965800 962 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
963 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
964 return AVERROR(EPERM);
965
7e726132 966 return 0;
1617ad97
FB
967}
968
3307e6ea 969void ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
93993933
MS
970 const char *cmd,
971 const unsigned char *send_content,
972 int send_content_length)
29b9f58b
RB
973{
974 RTSPState *rt = s->priv_data;
975 char buf[4096], buf1[1024];
976
977 rt->seq++;
978 av_strlcpy(buf, cmd, sizeof(buf));
979 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
980 av_strlcat(buf, buf1, sizeof(buf));
981 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
982 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
983 av_strlcat(buf, buf1, sizeof(buf));
984 }
f9337897
RB
985 if (rt->auth_b64)
986 av_strlcatf(buf, sizeof(buf),
ba93ea6d
RB
987 "Authorization: Basic %s\r\n",
988 rt->auth_b64);
dfd017bf
MS
989 if (send_content_length > 0 && send_content)
990 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 991 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
992
993 dprintf(s, "Sending:\n%s--\n", buf);
994
29b9f58b 995 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
996 if (send_content_length > 0 && send_content)
997 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
998 rt->last_cmd_time = av_gettime();
999}
1000
3307e6ea 1001void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
dfd017bf 1002{
3307e6ea 1003 ff_rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
dfd017bf
MS
1004}
1005
3307e6ea 1006void ff_rtsp_send_cmd(AVFormatContext *s,
93993933
MS
1007 const char *cmd, RTSPMessageHeader *reply,
1008 unsigned char **content_ptr)
30e79845 1009{
3307e6ea 1010 ff_rtsp_send_cmd_async(s, cmd);
29b9f58b 1011
3307e6ea 1012 ff_rtsp_read_reply(s, reply, content_ptr, 0);
29b9f58b
RB
1013}
1014
3307e6ea 1015void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
af037f80
MS
1016 const char *cmd,
1017 RTSPMessageHeader *reply,
1018 unsigned char **content_ptr,
1019 const unsigned char *send_content,
1020 int send_content_length)
dfd017bf 1021{
3307e6ea 1022 ff_rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
dfd017bf 1023
3307e6ea 1024 ff_rtsp_read_reply(s, reply, content_ptr, 0);
dfd017bf
MS
1025}
1026
53620bba
RB
1027/**
1028 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1029 */
c8965800
RB
1030static int make_setup_request(AVFormatContext *s, const char *host, int port,
1031 int lower_transport, const char *real_challenge)
1617ad97
FB
1032{
1033 RTSPState *rt = s->priv_data;
f830c9a4 1034 int rtx, j, i, err, interleave = 0;
1617ad97 1035 RTSPStream *rtsp_st;
a9e534d5 1036 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1037 char cmd[2048];
e9dea59f
RB
1038 const char *trans_pref;
1039
119b4668 1040 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1041 trans_pref = "x-pn-tng";
1042 else
1043 trans_pref = "RTP/AVP";
115329f1 1044
30e79845
RB
1045 /* default timeout: 1 minute */
1046 rt->timeout = 60;
1047
1617ad97
FB
1048 /* for each stream, make the setup request */
1049 /* XXX: we assume the same server is used for the control of each
c8965800 1050 * RTSP stream */
d1ccf0e0 1051
c8965800 1052 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1053 char transport[2048];
1054
f830c9a4
RB
1055 /**
1056 * WMS serves all UDP data over a single connection, the RTX, which
1057 * isn't necessarily the first in the SDP but has to be the first
1058 * to be set up, else the second/third SETUP will fail with a 461.
1059 */
1060 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1061 rt->server_type == RTSP_SERVER_WMS) {
1062 if (i == 0) {
1063 /* rtx first */
1064 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1065 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1066 if (len >= 4 &&
c8965800
RB
1067 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1068 "/rtx"))
f830c9a4
RB
1069 break;
1070 }
1071 if (rtx == rt->nb_rtsp_streams)
1072 return -1; /* no RTX found */
1073 rtsp_st = rt->rtsp_streams[rtx];
1074 } else
1075 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1076 } else
2fea9650 1077 rtsp_st = rt->rtsp_streams[i];
1617ad97 1078
1617ad97 1079 /* RTP/UDP */
90abbdba 1080 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1081 char buf[256];
85fb7b34 1082
f830c9a4
RB
1083 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1084 port = reply->transports[0].client_port_min;
1085 goto have_port;
1086 }
1087
85fb7b34 1088 /* first try in specified port range */
d1ccf0e0 1089 if (RTSP_RTP_PORT_MIN != 0) {
c8965800 1090 while (j <= RTSP_RTP_PORT_MAX) {
57b5555c
MS
1091 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1092 "?localport=%d", j);
c8965800
RB
1093 /* we will use two ports per rtp stream (rtp and rtcp) */
1094 j += 2;
1095 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1096 goto rtp_opened;
1097 }
1617ad97 1098 }
85fb7b34 1099
c8965800
RB
1100#if 0
1101 /* then try on any port */
1102 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1103 err = AVERROR_INVALIDDATA;
1104 goto fail;
1105 }
1106#endif
85fb7b34
FB
1107
1108 rtp_opened:
8b1ab7bf 1109 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1110 have_port:
0ad306bc 1111 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1112 "%s/UDP;", trans_pref);
1113 if (rt->server_type != RTSP_SERVER_REAL)
1114 av_strlcat(transport, "unicast;", sizeof(transport));
1115 av_strlcatf(transport, sizeof(transport),
1116 "client_port=%d", port);
f830c9a4
RB
1117 if (rt->transport == RTSP_TRANSPORT_RTP &&
1118 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1119 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1120 }
1121
1122 /* RTP/TCP */
90abbdba 1123 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1124 /** For WMS streams, the application streams are only used for
1125 * UDP. When trying to set it up for TCP streams, the server
1126 * will return an error. Therefore, we skip those streams. */
1127 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1128 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1129 CODEC_TYPE_DATA)
090438cc 1130 continue;
0ad306bc 1131 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1132 "%s/TCP;", trans_pref);
1133 if (rt->server_type == RTSP_SERVER_WMS)
1134 av_strlcat(transport, "unicast;", sizeof(transport));
1135 av_strlcatf(transport, sizeof(transport),
1136 "interleaved=%d-%d",
1137 interleave, interleave + 1);
1138 interleave += 2;
1617ad97
FB
1139 }
1140
90abbdba 1141 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1142 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1143 "%s/UDP;multicast", trans_pref);
1617ad97 1144 }
69adcc4f
MS
1145 if (s->oformat) {
1146 av_strlcat(transport, ";mode=receive", sizeof(transport));
1147 } else if (rt->server_type == RTSP_SERVER_REAL ||
2efc97c2 1148 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1149 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1150 snprintf(cmd, sizeof(cmd),
b6892136
FB
1151 "SETUP %s RTSP/1.0\r\n"
1152 "Transport: %s\r\n",
1617ad97 1153 rtsp_st->control_url, transport);
2e889ae4 1154 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1155 char real_res[41], real_csum[9];
1156 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1157 real_challenge);
1158 av_strlcatf(cmd, sizeof(cmd),
1159 "If-Match: %s\r\n"
1160 "RealChallenge2: %s, sd=%s\r\n",
1161 rt->session_id, real_res, real_csum);
1162 }
3307e6ea 1163 ff_rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1164 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1165 err = 1;
1166 goto fail;
7e6ca34f
RB
1167 } else if (reply->status_code != RTSP_STATUS_OK ||
1168 reply->nb_transports != 1) {
1617ad97
FB
1169 err = AVERROR_INVALIDDATA;
1170 goto fail;
1171 }
1172
1173 /* XXX: same protocol for all streams is required */
1174 if (i > 0) {
119b4668
RB
1175 if (reply->transports[0].lower_transport != rt->lower_transport ||
1176 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1177 err = AVERROR_INVALIDDATA;
1178 goto fail;
1179 }
1180 } else {
90abbdba 1181 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1182 rt->transport = reply->transports[0].transport;
1617ad97
FB
1183 }
1184
1185 /* close RTP connection if not choosen */
90abbdba
RB
1186 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1187 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1188 url_close(rtsp_st->rtp_handle);
1189 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1190 }
1191
90abbdba
RB
1192 switch(reply->transports[0].lower_transport) {
1193 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1194 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1195 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1196 break;
115329f1 1197
c8965800
RB
1198 case RTSP_LOWER_TRANSPORT_UDP: {
1199 char url[1024];
1200
1201 /* XXX: also use address if specified */
57b5555c
MS
1202 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1203 reply->transports[0].server_port_min, NULL);
c8965800
RB
1204 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1205 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1206 err = AVERROR_INVALIDDATA;
1207 goto fail;
1617ad97 1208 }
9c8fa20d
MS
1209 /* Try to initialize the connection state in a
1210 * potential NAT router by sending dummy packets.
1211 * RTP/RTCP dummy packets are used for RDT, too.
1212 */
30ff7c5c 1213 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1214 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1215 break;
c8965800
RB
1216 }
1217 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1218 char url[1024];
1219 struct in_addr in;
1220 int port, ttl;
1221
1222 if (reply->transports[0].destination) {
1223 in.s_addr = htonl(reply->transports[0].destination);
1224 port = reply->transports[0].port_min;
1225 ttl = reply->transports[0].ttl;
1226 } else {
1227 in = rtsp_st->sdp_ip;
1228 port = rtsp_st->sdp_port;
1229 ttl = rtsp_st->sdp_ttl;
1230 }
57b5555c
MS
1231 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1232 port, "?ttl=%d", ttl);
c8965800
RB
1233 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1234 err = AVERROR_INVALIDDATA;
1235 goto fail;
1617ad97
FB
1236 }
1237 break;
1238 }
c8965800 1239 }
d1ccf0e0 1240
ee0cb67f 1241 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1242 goto fail;
1617ad97
FB
1243 }
1244
30e79845
RB
1245 if (reply->timeout > 0)
1246 rt->timeout = reply->timeout;
1247
2e889ae4 1248 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1249 rt->need_subscription = 1;
1250
53620bba
RB
1251 return 0;
1252
1253fail:
c8965800 1254 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1255 if (rt->rtsp_streams[i]->rtp_handle) {
1256 url_close(rt->rtsp_streams[i]->rtp_handle);
1257 rt->rtsp_streams[i]->rtp_handle = NULL;
1258 }
1259 }
53620bba
RB
1260 return err;
1261}
1262
1ced9da3
LA
1263static int rtsp_read_play(AVFormatContext *s)
1264{
1265 RTSPState *rt = s->priv_data;
1266 RTSPMessageHeader reply1, *reply = &reply1;
1267 char cmd[1024];
1268
1269 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1270
1271 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1272 if (rt->state == RTSP_STATE_PAUSED) {
1273 snprintf(cmd, sizeof(cmd),
1274 "PLAY %s RTSP/1.0\r\n",
00eb13e0 1275 rt->control_uri);
1ced9da3
LA
1276 } else {
1277 snprintf(cmd, sizeof(cmd),
1278 "PLAY %s RTSP/1.0\r\n"
1279 "Range: npt=%0.3f-\r\n",
00eb13e0 1280 rt->control_uri,
1ced9da3
LA
1281 (double)rt->seek_timestamp / AV_TIME_BASE);
1282 }
3307e6ea 1283 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1ced9da3
LA
1284 if (reply->status_code != RTSP_STATUS_OK) {
1285 return -1;
1286 }
1287 }
c02fd3d2 1288 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1289 return 0;
1290}
1291
e23d195d
MS
1292static int rtsp_setup_input_streams(AVFormatContext *s)
1293{
1294 RTSPState *rt = s->priv_data;
1295 RTSPMessageHeader reply1, *reply = &reply1;
1296 char cmd[1024];
1297 unsigned char *content = NULL;
1298 int ret;
1299
1300 /* describe the stream */
1301 snprintf(cmd, sizeof(cmd),
1302 "DESCRIBE %s RTSP/1.0\r\n"
1303 "Accept: application/sdp\r\n",
db76ca7f 1304 rt->control_uri);
e23d195d
MS
1305 if (rt->server_type == RTSP_SERVER_REAL) {
1306 /**
1307 * The Require: attribute is needed for proper streaming from
1308 * Realmedia servers.
1309 */
1310 av_strlcat(cmd,
1311 "Require: com.real.retain-entity-for-setup\r\n",
1312 sizeof(cmd));
1313 }
3307e6ea 1314 ff_rtsp_send_cmd(s, cmd, reply, &content);
e23d195d
MS
1315 if (!content)
1316 return AVERROR_INVALIDDATA;
1317 if (reply->status_code != RTSP_STATUS_OK) {
1318 av_freep(&content);
1319 return AVERROR_INVALIDDATA;
1320 }
1321
1322 /* now we got the SDP description, we parse it */
1323 ret = sdp_parse(s, (const char *)content);
1324 av_freep(&content);
1325 if (ret < 0)
1326 return AVERROR_INVALIDDATA;
1327
1328 return 0;
1329}
1330
26cb700c 1331static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
3e24c770
MS
1332{
1333 RTSPState *rt = s->priv_data;
1334 RTSPMessageHeader reply1, *reply = &reply1;
1335 char cmd[1024];
1336 int i;
1337 char *sdp;
26cb700c 1338 AVFormatContext sdp_ctx, *ctx_array[1];
3e24c770
MS
1339
1340 /* Announce the stream */
1341 snprintf(cmd, sizeof(cmd),
1342 "ANNOUNCE %s RTSP/1.0\r\n"
1343 "Content-Type: application/sdp\r\n",
db76ca7f 1344 rt->control_uri);
3e24c770
MS
1345 sdp = av_mallocz(8192);
1346 if (sdp == NULL)
1347 return AVERROR(ENOMEM);
26cb700c
MS
1348 /* We create the SDP based on the RTSP AVFormatContext where we
1349 * aren't allowed to change the filename field. (We create the SDP
1350 * based on the RTSP context since the contexts for the RTP streams
1351 * don't exist yet.) In order to specify a custom URL with the actual
1352 * peer IP instead of the originally specified hostname, we create
1353 * a temporary copy of the AVFormatContext, where the custom URL is set.
1354 *
1355 * FIXME: Create the SDP without copying the AVFormatContext.
1356 * This either requires setting up the RTP stream AVFormatContexts
1357 * already here (complicating things immensely) or getting a more
1358 * flexible SDP creation interface.
1359 */
1360 sdp_ctx = *s;
1361 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1362 "rtsp", NULL, addr, -1, NULL);
1363 ctx_array[0] = &sdp_ctx;
1364 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
3e24c770
MS
1365 av_free(sdp);
1366 return AVERROR_INVALIDDATA;
1367 }
1368 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
3307e6ea 1369 ff_rtsp_send_cmd_with_content(s, cmd, reply, NULL, sdp, strlen(sdp));
3e24c770
MS
1370 av_free(sdp);
1371 if (reply->status_code != RTSP_STATUS_OK)
1372 return AVERROR_INVALIDDATA;
1373
1374 /* Set up the RTSPStreams for each AVStream */
1375 for (i = 0; i < s->nb_streams; i++) {
1376 RTSPStream *rtsp_st;
1377 AVStream *st = s->streams[i];
1378
1379 rtsp_st = av_mallocz(sizeof(RTSPStream));
1380 if (!rtsp_st)
1381 return AVERROR(ENOMEM);
1382 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1383
1384 st->priv_data = rtsp_st;
1385 rtsp_st->stream_index = i;
1386
db76ca7f 1387 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
3e24c770
MS
1388 /* Note, this must match the relative uri set in the sdp content */
1389 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1390 "/streamid=%d", i);
1391 }
1392
1393 return 0;
1394}
1395
3307e6ea 1396int ff_rtsp_connect(AVFormatContext *s)
53620bba
RB
1397{
1398 RTSPState *rt = s->priv_data;
921da217
LB
1399 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1400 char *option_list, *option, *filename;
53620bba 1401 URLContext *rtsp_hd;
03f8fc08 1402 int port, err, tcp_fd;
a9e534d5 1403 RTSPMessageHeader reply1, *reply = &reply1;
90abbdba 1404 int lower_transport_mask = 0;
1cf151e9 1405 char real_challenge[64];
03f8fc08
MS
1406 struct sockaddr_storage peer;
1407 socklen_t peer_len = sizeof(peer);
57b5555c
MS
1408
1409 if (!ff_network_init())
1410 return AVERROR(EIO);
c8965800 1411redirect:
53620bba 1412 /* extract hostname and port */
c5c6e67c 1413 ff_url_split(NULL, 0, auth, sizeof(auth),
f984dcf6 1414 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897
RB
1415 if (*auth) {
1416 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1417
1418 if (!(rt->auth_b64 = av_malloc(b64_len)))
1419 return AVERROR(ENOMEM);
1420 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1421 err = AVERROR(EINVAL);
1422 goto fail;
1423 }
1424 }
53620bba
RB
1425 if (port < 0)
1426 port = RTSP_DEFAULT_PORT;
1427
1428 /* search for options */
1429 option_list = strchr(path, '?');
1430 if (option_list) {
921da217 1431 filename = strchr(s->filename, '?');
c8965800 1432 while (option_list) {
53620bba 1433 /* move the option pointer */
921da217 1434 option = ++option_list;
53620bba
RB
1435 option_list = strchr(option_list, '&');
1436 if (option_list)
921da217
LB
1437 *option_list = 0;
1438
53620bba 1439 /* handle the options */
c8965800 1440 if (!strcmp(option, "udp")) {
90abbdba 1441 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1442 } else if (!strcmp(option, "multicast")) {
90abbdba 1443 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1444 } else if (!strcmp(option, "tcp")) {
90abbdba 1445 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1446 } else {
921da217
LB
1447 strcpy(++filename, option);
1448 filename += strlen(option);
1449 if (option_list) *filename = '&';
1450 }
53620bba 1451 }
921da217 1452 *filename = 0;
53620bba
RB
1453 }
1454
90abbdba 1455 if (!lower_transport_mask)
2a1d51c5 1456 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba 1457
3e24c770
MS
1458 if (s->oformat) {
1459 /* Only UDP output is supported at the moment. */
1460 lower_transport_mask &= 1 << RTSP_LOWER_TRANSPORT_UDP;
1461 if (!lower_transport_mask) {
1462 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1463 "only UDP is supported for output.\n");
1464 err = AVERROR(EINVAL);
1465 goto fail;
1466 }
1467 }
1468
53620bba 1469 /* open the tcp connexion */
57b5555c 1470 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
f9337897
RB
1471 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1472 err = AVERROR(EIO);
1473 goto fail;
1474 }
53620bba
RB
1475 rt->rtsp_hd = rtsp_hd;
1476 rt->seq = 0;
1477
03f8fc08
MS
1478 tcp_fd = url_get_file_handle(rtsp_hd);
1479 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1480 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1481 NULL, 0, NI_NUMERICHOST);
1482 }
1483
c8965800
RB
1484 /* request options supported by the server; this also detects server
1485 * type */
00eb13e0
AS
1486 av_strlcpy(rt->control_uri, s->filename,
1487 sizeof(rt->control_uri));
1cf151e9
RB
1488 for (rt->server_type = RTSP_SERVER_RTP;;) {
1489 snprintf(cmd, sizeof(cmd),
db76ca7f 1490 "OPTIONS %s RTSP/1.0\r\n", rt->control_uri);
2e889ae4 1491 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1492 av_strlcat(cmd,
1493 /**
1494 * The following entries are required for proper
1495 * streaming from a Realmedia server. They are
1496 * interdependent in some way although we currently
1497 * don't quite understand how. Values were copied
1498 * from mplayer SVN r23589.
1499 * @param CompanyID is a 16-byte ID in base64
1500 * @param ClientChallenge is a 16-byte ID in hex
1501 */
1502 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1503 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1504 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1505 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1506 sizeof(cmd));
3307e6ea 1507 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1cf151e9
RB
1508 if (reply->status_code != RTSP_STATUS_OK) {
1509 err = AVERROR_INVALIDDATA;
1510 goto fail;
1511 }
1512
1513 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1514 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1515 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1516 continue;
7a86bafa
RB
1517 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1518 rt->server_type = RTSP_SERVER_WMS;
c8965800 1519 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1520 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1521 break;
1522 }
1523
3e24c770 1524 if (s->iformat)
2efc97c2 1525 err = rtsp_setup_input_streams(s);
3e24c770 1526 else
26cb700c 1527 err = rtsp_setup_output_streams(s, host);
e23d195d 1528 if (err)
53620bba 1529 goto fail;
53620bba 1530
8a8754d8 1531 do {
c8965800
RB
1532 int lower_transport = ff_log2_tab[lower_transport_mask &
1533 ~(lower_transport_mask - 1)];
8a8754d8 1534
90abbdba 1535 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1536 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1537 real_challenge : NULL);
8a8754d8 1538 if (err < 0)
7e6ca34f 1539 goto fail;
90abbdba
RB
1540 lower_transport_mask &= ~(1 << lower_transport);
1541 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1542 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1543 goto fail;
1544 }
1545 } while (err);
53620bba 1546
ff762d6e 1547 rt->state = RTSP_STATE_IDLE;
c8965800 1548 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1549 return 0;
1550 fail:
3307e6ea 1551 ff_rtsp_close_streams(s);
1617ad97 1552 url_close(rt->rtsp_hd);
35cfd646 1553 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
d243ba30
LB
1554 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1555 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1556 reply->status_code,
1557 s->filename);
1558 goto redirect;
1559 }
57b5555c 1560 ff_network_close();
1617ad97
FB
1561 return err;
1562}
6f5a3d0a 1563#endif
1617ad97 1564
6f5a3d0a 1565#if CONFIG_RTSP_DEMUXER
4280f9bb
MS
1566static int rtsp_read_header(AVFormatContext *s,
1567 AVFormatParameters *ap)
1568{
1569 RTSPState *rt = s->priv_data;
1570 int ret;
1571
3307e6ea 1572 ret = ff_rtsp_connect(s);
4280f9bb
MS
1573 if (ret)
1574 return ret;
1575
1576 if (ap->initial_pause) {
1577 /* do not start immediately */
1578 } else {
1579 if (rtsp_read_play(s) < 0) {
3307e6ea 1580 ff_rtsp_close_streams(s);
4280f9bb
MS
1581 url_close(rt->rtsp_hd);
1582 return AVERROR_INVALIDDATA;
1583 }
1584 }
1585
1586 return 0;
1587}
1588
0e59034e
RB
1589static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1590 uint8_t *buf, int buf_size)
1591{
1592 RTSPState *rt = s->priv_data;
1593 RTSPStream *rtsp_st;
1594 fd_set rfds;
1595 int fd, fd_max, n, i, ret, tcp_fd;
1596 struct timeval tv;
1597
c8965800 1598 for (;;) {
0e59034e
RB
1599 if (url_interrupt_cb())
1600 return AVERROR(EINTR);
1601 FD_ZERO(&rfds);
1602 if (rt->rtsp_hd) {
1603 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1604 FD_SET(tcp_fd, &rfds);
1605 } else {
1606 fd_max = 0;
1607 tcp_fd = -1;
1608 }
c8965800 1609 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1610 rtsp_st = rt->rtsp_streams[i];
1611 if (rtsp_st->rtp_handle) {
1612 /* currently, we cannot probe RTCP handle because of
1613 * blocking restrictions */
1614 fd = url_get_file_handle(rtsp_st->rtp_handle);
1615 if (fd > fd_max)
1616 fd_max = fd;
1617 FD_SET(fd, &rfds);
1618 }
1619 }
1620 tv.tv_sec = 0;
1621 tv.tv_usec = 100 * 1000;
1622 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1623 if (n > 0) {
c8965800 1624 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1625 rtsp_st = rt->rtsp_streams[i];
1626 if (rtsp_st->rtp_handle) {
1627 fd = url_get_file_handle(rtsp_st->rtp_handle);
1628 if (FD_ISSET(fd, &rfds)) {
1629 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1630 if (ret > 0) {
1631 *prtsp_st = rtsp_st;
1632 return ret;
1633 }
1634 }
1635 }
1636 }
1637#if CONFIG_RTSP_DEMUXER
27000636 1638 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1639 RTSPMessageHeader reply;
1640
3307e6ea 1641 ff_rtsp_read_reply(s, &reply, NULL, 0);
0e59034e 1642 /* XXX: parse message */
c02fd3d2 1643 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1644 return 0;
1645 }
1646#endif
1647 }
1648 }
1649}
1650
8b1ab7bf
FB
1651static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1652 uint8_t *buf, int buf_size)
1617ad97
FB
1653{
1654 RTSPState *rt = s->priv_data;
b6892136 1655 int id, len, i, ret;
1617ad97 1656 RTSPStream *rtsp_st;
1617ad97 1657
b6892136 1658#ifdef DEBUG_RTP_TCP
67c9cd69 1659 dprintf(s, "tcp_read_packet:\n");
b6892136 1660#endif
c8965800
RB
1661redo:
1662 for (;;) {
7e726132
RB
1663 RTSPMessageHeader reply;
1664
3307e6ea 1665 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
7e726132 1666 if (ret == -1)
8b1ab7bf 1667 return -1;
7e726132 1668 if (ret == 1) /* received '$' */
1617ad97 1669 break;
7e726132 1670 /* XXX: parse message */
c02fd3d2 1671 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1672 return 0;
1617ad97 1673 }
0e848977 1674 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1675 if (ret != 3)
8b1ab7bf 1676 return -1;
c8965800 1677 id = buf[0];
80fb8234 1678 len = AV_RB16(buf + 1);
b6892136 1679#ifdef DEBUG_RTP_TCP
67c9cd69 1680 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1681#endif
8b1ab7bf 1682 if (len > buf_size || len < 12)
1617ad97
FB
1683 goto redo;
1684 /* get the data */
0e848977 1685 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1686 if (ret != len)
8b1ab7bf 1687 return -1;
985b05d3 1688 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1689 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1690 return -1;
115329f1 1691
1617ad97 1692 /* find the matching stream */
c8965800 1693 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1694 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1695 if (id >= rtsp_st->interleaved_min &&
1696 id <= rtsp_st->interleaved_max)
1617ad97
FB
1697 goto found;
1698 }
1699 goto redo;
c8965800 1700found:
8b1ab7bf
FB
1701 *prtsp_st = rtsp_st;
1702 return len;
1617ad97
FB
1703}
1704
0e59034e
RB
1705static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1706{
1707 RTSPState *rt = s->priv_data;
1708 int ret, len;
1709 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1710 RTSPStream *rtsp_st;
1711
1712 /* get next frames from the same RTP packet */
1713 if (rt->cur_transport_priv) {
c8965800 1714 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1715 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1716 } else
0e59034e
RB
1717 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1718 if (ret == 0) {
1719 rt->cur_transport_priv = NULL;
1720 return 0;
1721 } else if (ret == 1) {
1722 return 0;
c8965800 1723 } else
0e59034e 1724 rt->cur_transport_priv = NULL;
0e59034e
RB
1725 }
1726
1727 /* read next RTP packet */
1728 redo:
1729 switch(rt->lower_transport) {
1730 default:
1731#if CONFIG_RTSP_DEMUXER
1732 case RTSP_LOWER_TRANSPORT_TCP:
1733 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1734 break;
1735#endif
1736 case RTSP_LOWER_TRANSPORT_UDP:
1737 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1738 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1739 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1740 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1741 break;
1742 }
1743 if (len < 0)
1744 return len;
1745 if (len == 0)
1746 return AVERROR_EOF;
c8965800 1747 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1748 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1749 } else
0e59034e
RB
1750 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1751 if (ret < 0)
1752 goto redo;
c8965800 1753 if (ret == 1)
0e59034e
RB
1754 /* more packets may follow, so we save the RTP context */
1755 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1756
1757 return ret;
1758}
1759
c8965800 1760static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1761{
1762 RTSPState *rt = s->priv_data;
98713182 1763 int ret;
30e79845
RB
1764 RTSPMessageHeader reply1, *reply = &reply1;
1765 char cmd[1024];
8b1ab7bf 1766
572c6a38 1767 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1768 int i;
572c6a38 1769 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1770
572c6a38
RB
1771 for (i = 0; i < s->nb_streams; i++)
1772 cache[i] = s->streams[i]->discard;
1773
1774 if (!rt->need_subscription) {
1775 if (memcmp (cache, rt->real_setup_cache,
1776 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1777 snprintf(cmd, sizeof(cmd),
7eaa646f
RB
1778 "SET_PARAMETER %s RTSP/1.0\r\n"
1779 "Unsubscribe: %s\r\n",
00eb13e0 1780 rt->control_uri, rt->last_subscription);
3307e6ea 1781 ff_rtsp_send_cmd(s, cmd, reply, NULL);
572c6a38
RB
1782 if (reply->status_code != RTSP_STATUS_OK)
1783 return AVERROR_INVALIDDATA;
1784 rt->need_subscription = 1;
1785 }
1256d16b 1786 }
1256d16b 1787
572c6a38
RB
1788 if (rt->need_subscription) {
1789 int r, rule_nr, first = 1;
1790
1791 memcpy(rt->real_setup_cache, cache,
1792 sizeof(enum AVDiscard) * s->nb_streams);
1793 rt->last_subscription[0] = 0;
1794
1795 snprintf(cmd, sizeof(cmd),
1796 "SET_PARAMETER %s RTSP/1.0\r\n"
1797 "Subscribe: ",
00eb13e0 1798 rt->control_uri);
572c6a38
RB
1799 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1800 rule_nr = 0;
1801 for (r = 0; r < s->nb_streams; r++) {
1802 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1803 if (s->streams[r]->discard != AVDISCARD_ALL) {
1804 if (!first)
1805 av_strlcat(rt->last_subscription, ",",
1806 sizeof(rt->last_subscription));
1807 ff_rdt_subscribe_rule(
1808 rt->last_subscription,
1809 sizeof(rt->last_subscription), i, rule_nr);
1810 first = 0;
1811 }
1812 rule_nr++;
1813 }
1814 }
1815 }
1816 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
3307e6ea 1817 ff_rtsp_send_cmd(s, cmd, reply, NULL);
572c6a38
RB
1818 if (reply->status_code != RTSP_STATUS_OK)
1819 return AVERROR_INVALIDDATA;
1820 rt->need_subscription = 0;
1821
c02fd3d2 1822 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1823 rtsp_read_play (s);
1824 }
1256d16b
RB
1825 }
1826
d7250724 1827 ret = rtsp_fetch_packet(s, pkt);
c8965800 1828 if (ret < 0)
98713182 1829 return ret;
30e79845
RB
1830
1831 /* send dummy request to keep TCP connection alive */
1832 if ((rt->server_type == RTSP_SERVER_WMS ||
1833 rt->server_type == RTSP_SERVER_REAL) &&
1834 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1835 if (rt->server_type == RTSP_SERVER_WMS) {
1836 snprintf(cmd, sizeof(cmd) - 1,
1837 "GET_PARAMETER %s RTSP/1.0\r\n",
00eb13e0 1838 rt->control_uri);
3307e6ea 1839 ff_rtsp_send_cmd_async(s, cmd);
30e79845 1840 } else {
3307e6ea 1841 ff_rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
30e79845
RB
1842 }
1843 }
1844
8b1ab7bf 1845 return 0;
1617ad97
FB
1846}
1847
ff762d6e
FB
1848/* pause the stream */
1849static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1850{
ff762d6e 1851 RTSPState *rt = s->priv_data;
a9e534d5 1852 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1853 char cmd[1024];
1854
b7b8fc34 1855 rt = s->priv_data;
115329f1 1856
c02fd3d2 1857 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1858 return 0;
2e889ae4 1859 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1860 snprintf(cmd, sizeof(cmd),
1861 "PAUSE %s RTSP/1.0\r\n",
00eb13e0 1862 rt->control_uri);
3307e6ea 1863 ff_rtsp_send_cmd(s, cmd, reply, NULL);
99b2ac07
RB
1864 if (reply->status_code != RTSP_STATUS_OK) {
1865 return -1;
1866 }
1256d16b 1867 }
5f86057f
RB
1868 rt->state = RTSP_STATE_PAUSED;
1869 return 0;
b7b8fc34
FB
1870}
1871
115329f1 1872static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1873 int64_t timestamp, int flags)
ff762d6e
FB
1874{
1875 RTSPState *rt = s->priv_data;
115329f1 1876
c8965800
RB
1877 rt->seek_timestamp = av_rescale_q(timestamp,
1878 s->streams[stream_index]->time_base,
1879 AV_TIME_BASE_Q);
ff762d6e
FB
1880 switch(rt->state) {
1881 default:
1882 case RTSP_STATE_IDLE:
1883 break;
c02fd3d2 1884 case RTSP_STATE_STREAMING:
ec606b36
LB
1885 if (rtsp_read_pause(s) != 0)
1886 return -1;
1887 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1888 if (rtsp_read_play(s) != 0)
1889 return -1;
1890 break;
1891 case RTSP_STATE_PAUSED:
1892 rt->state = RTSP_STATE_IDLE;
1893 break;
1894 }
1895 return 0;
1896}
1897
1617ad97
FB
1898static int rtsp_read_close(AVFormatContext *s)
1899{
1900 RTSPState *rt = s->priv_data;
1617ad97
FB
1901 char cmd[1024];
1902
b6892136 1903#if 0
1617ad97 1904 /* NOTE: it is valid to flush the buffer here */
90abbdba 1905 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1906 url_fclose(&rt->rtsp_gb);
1907 }
b6892136 1908#endif
115329f1 1909 snprintf(cmd, sizeof(cmd),
b6892136 1910 "TEARDOWN %s RTSP/1.0\r\n",
db76ca7f 1911 rt->control_uri);
3307e6ea 1912 ff_rtsp_send_cmd_async(s, cmd);
1617ad97 1913
3307e6ea 1914 ff_rtsp_close_streams(s);
1617ad97 1915 url_close(rt->rtsp_hd);
57b5555c 1916 ff_network_close();
1617ad97
FB
1917 return 0;
1918}
1919
d2a067d1 1920AVInputFormat rtsp_demuxer = {
1617ad97 1921 "rtsp",
bde15e74 1922 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1923 sizeof(RTSPState),
1924 rtsp_probe,
1925 rtsp_read_header,
1926 rtsp_read_packet,
1927 rtsp_read_close,
ff762d6e 1928 rtsp_read_seek,
bb76a117 1929 .flags = AVFMT_NOFILE,
ff762d6e
FB
1930 .read_play = rtsp_read_play,
1931 .read_pause = rtsp_read_pause,
1617ad97 1932};
96862926 1933#endif
1617ad97 1934
cb1fdc61 1935static int sdp_probe(AVProbeData *p1)
93ced3e8 1936{
0e1ceacd 1937 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1938
1939 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1940 while (p < p_end && *p != '\0') {
c8965800
RB
1941 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1942 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1943 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1944
c8965800 1945 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1946 if (++p >= p_end)
cb1fdc61 1947 break;
cb1fdc61
FB
1948 if (*p == '\r')
1949 p++;
1950 }
93ced3e8
FB
1951 return 0;
1952}
1953
1954#define SDP_MAX_SIZE 8192
1955
c8965800 1956static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1957{
8b1ab7bf 1958 RTSPState *rt = s->priv_data;
93ced3e8
FB
1959 RTSPStream *rtsp_st;
1960 int size, i, err;
1961 char *content;
1962 char url[1024];
1963
57b5555c
MS
1964 if (!ff_network_init())
1965 return AVERROR(EIO);
1966
93ced3e8
FB
1967 /* read the whole sdp file */
1968 /* XXX: better loading */
1969 content = av_malloc(SDP_MAX_SIZE);
899681cd 1970 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1971 if (size <= 0) {
1972 av_free(content);
1973 return AVERROR_INVALIDDATA;
1974 }
1975 content[size] ='\0';
1976
1977 sdp_parse(s, content);
1978 av_free(content);
1979
1980 /* open each RTP stream */
c8965800 1981 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1982 rtsp_st = rt->rtsp_streams[i];
115329f1 1983
57b5555c
MS
1984 ff_url_join(url, sizeof(url), "rtp", NULL,
1985 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
1986 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1987 rtsp_st->sdp_ttl);
dbf30963 1988 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1989 err = AVERROR_INVALIDDATA;
1990 goto fail;
1991 }
ee0cb67f 1992 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1993 goto fail;
93ced3e8
FB
1994 }
1995 return 0;
c8965800 1996fail:
3307e6ea 1997 ff_rtsp_close_streams(s);
57b5555c 1998 ff_network_close();
93ced3e8
FB
1999 return err;
2000}
2001
93ced3e8
FB
2002static int sdp_read_close(AVFormatContext *s)
2003{
3307e6ea 2004 ff_rtsp_close_streams(s);
57b5555c 2005 ff_network_close();
93ced3e8
FB
2006 return 0;
2007}
2008
ff70e601 2009AVInputFormat sdp_demuxer = {
93ced3e8 2010 "sdp",
bde15e74 2011 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
2012 sizeof(RTSPState),
2013 sdp_probe,
2014 sdp_read_header,
d7250724 2015 rtsp_fetch_packet,
93ced3e8
FB
2016 sdp_read_close,
2017};