Remove a redundant null pointer check
[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>
e4a9e3cc 32#include "internal.h"
42572ef5 33#include "network.h"
cbfa66d0 34#include "os_support.h"
c971ff19 35#include "rtsp.h"
1617ad97 36
302879cb 37#include "rtpdec.h"
e9dea59f 38#include "rdt.h"
f65919af
MS
39#include "rtpdec_asf.h"
40#include "rtpdec_vorbis.h"
4934884a 41
1617ad97 42//#define DEBUG
b6892136 43//#define DEBUG_RTP_TCP
1617ad97 44
c482500f 45#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 46int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 47#endif
85fb7b34 48
1ef36a70 49#define SPACE_CHARS " \t\r\n"
da1e126e
RB
50/* we use memchr() instead of strchr() here because strchr() will return
51 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
52#define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
1617ad97
FB
53static void skip_spaces(const char **pp)
54{
55 const char *p;
56 p = *pp;
57 while (redir_isspace(*p))
58 p++;
59 *pp = p;
60}
61
1ef36a70
RB
62static void get_word_until_chars(char *buf, int buf_size,
63 const char *sep, const char **pp)
1617ad97
FB
64{
65 const char *p;
66 char *q;
67
68 p = *pp;
69 skip_spaces(&p);
70 q = buf;
71 while (!strchr(sep, *p) && *p != '\0') {
72 if ((q - buf) < buf_size - 1)
73 *q++ = *p;
74 p++;
75 }
76 if (buf_size > 0)
77 *q = '\0';
78 *pp = p;
79}
80
1ef36a70
RB
81static void get_word_sep(char *buf, int buf_size, const char *sep,
82 const char **pp)
1617ad97 83{
1ef36a70
RB
84 if (**pp == '/') (*pp)++;
85 get_word_until_chars(buf, buf_size, sep, pp);
86}
1617ad97 87
1ef36a70
RB
88static void get_word(char *buf, int buf_size, const char **pp)
89{
90 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
1617ad97
FB
91}
92
c8965800 93/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
8f3c87f3
RB
94static int sdp_parse_rtpmap(AVFormatContext *s,
95 AVCodecContext *codec, RTSPStream *rtsp_st,
c8965800 96 int payload_type, const char *p)
93ced3e8
FB
97{
98 char buf[256];
d1ccf0e0
RD
99 int i;
100 AVCodec *c;
7b49ce2e 101 const char *c_name;
93ced3e8 102
d1ccf0e0 103 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
9d50d396
RB
104 * see if we can handle this kind of payload.
105 * The space should normally not be there but some Real streams or
106 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
107 * have a trailing space. */
108 get_word_sep(buf, sizeof(buf), "/ ", &p);
d1ccf0e0 109 if (payload_type >= RTP_PT_PRIVATE) {
c8965800
RB
110 RTPDynamicProtocolHandler *handler;
111 for (handler = RTPFirstDynamicPayloadHandler;
112 handler; handler = handler->next) {
113 if (!strcasecmp(buf, handler->enc_name) &&
114 codec->codec_type == handler->codec_type) {
115 codec->codec_id = handler->codec_id;
116 rtsp_st->dynamic_handler = handler;
117 if (handler->open)
118 rtsp_st->dynamic_protocol_context = handler->open();
d1ccf0e0
RD
119 break;
120 }
4934884a 121 }
93ced3e8 122 } else {
c8965800
RB
123 /* We are in a standard case
124 * (from http://www.iana.org/assignments/rtp-parameters). */
d1ccf0e0 125 /* search into AVRtpPayloadTypes[] */
7ed19d7f 126 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
127 }
128
129 c = avcodec_find_decoder(codec->codec_id);
130 if (c && c->name)
7b49ce2e 131 c_name = c->name;
d1ccf0e0 132 else
170870b7 133 c_name = "(null)";
d1ccf0e0 134
7515ed0c
RB
135 get_word_sep(buf, sizeof(buf), "/", &p);
136 i = atoi(buf);
137 switch (codec->codec_type) {
138 case CODEC_TYPE_AUDIO:
139 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
140 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
141 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
142 if (i > 0) {
143 codec->sample_rate = i;
144 get_word_sep(buf, sizeof(buf), "/", &p);
145 i = atoi(buf);
146 if (i > 0)
147 codec->channels = i;
148 // TODO: there is a bug here; if it is a mono stream, and
149 // less than 22000Hz, faad upconverts to stereo and twice
150 // the frequency. No problem, but the sample rate is being
151 // set here by the sdp line. Patch on its way. (rdm)
d1ccf0e0 152 }
7515ed0c
RB
153 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
154 codec->sample_rate);
155 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
156 codec->channels);
157 break;
158 case CODEC_TYPE_VIDEO:
159 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
160 break;
161 default:
162 break;
163 }
164 return 0;
93ced3e8
FB
165}
166
c8965800 167/* return the length and optionally the data */
93ced3e8
FB
168static int hex_to_data(uint8_t *data, const char *p)
169{
170 int c, len, v;
171
172 len = 0;
173 v = 1;
c8965800 174 for (;;) {
93ced3e8 175 skip_spaces(&p);
6a8c8b36 176 if (*p == '\0')
93ced3e8 177 break;
c8965800 178 c = toupper((unsigned char) *p++);
93ced3e8
FB
179 if (c >= '0' && c <= '9')
180 c = c - '0';
181 else if (c >= 'A' && c <= 'F')
182 c = c - 'A' + 10;
183 else
184 break;
185 v = (v << 4) | c;
186 if (v & 0x100) {
187 if (data)
188 data[len] = v;
189 len++;
190 v = 1;
191 }
192 }
193 return len;
194}
195
e6327fba
RB
196static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
197 char *attr, char *value)
d1ccf0e0
RD
198{
199 switch (codec->codec_id) {
c8965800
RB
200 case CODEC_ID_MPEG4:
201 case CODEC_ID_AAC:
202 if (!strcmp(attr, "config")) {
203 /* decode the hexa encoded parameter */
204 int len = hex_to_data(NULL, value);
205 if (codec->extradata)
206 av_free(codec->extradata);
207 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
208 if (!codec->extradata)
209 return;
210 codec->extradata_size = len;
211 hex_to_data(codec->extradata, value);
212 }
213 break;
214 case CODEC_ID_VORBIS:
215 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
216 break;
217 default:
218 break;
d1ccf0e0
RD
219 }
220 return;
221}
222
644e7acb 223typedef struct {
7b49ce2e 224 const char *str;
c8965800
RB
225 uint16_t type;
226 uint32_t offset;
644e7acb 227} AttrNameMap;
d1ccf0e0
RD
228
229/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
230#define ATTR_NAME_TYPE_INT 0
231#define ATTR_NAME_TYPE_STR 1
644e7acb 232static const AttrNameMap attr_names[]=
d1ccf0e0 233{
c8965800
RB
234 { "SizeLength", ATTR_NAME_TYPE_INT,
235 offsetof(RTPPayloadData, sizelength) },
236 { "IndexLength", ATTR_NAME_TYPE_INT,
237 offsetof(RTPPayloadData, indexlength) },
238 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
239 offsetof(RTPPayloadData, indexdeltalength) },
240 { "profile-level-id", ATTR_NAME_TYPE_INT,
241 offsetof(RTPPayloadData, profile_level_id) },
242 { "StreamType", ATTR_NAME_TYPE_INT,
243 offsetof(RTPPayloadData, streamtype) },
244 { "mode", ATTR_NAME_TYPE_STR,
245 offsetof(RTPPayloadData, mode) },
246 { NULL, -1, -1 },
d1ccf0e0
RD
247};
248
c8965800
RB
249/* parse the attribute line from the fmtp a line of an sdp resonse. This
250 * is broken out as a function because it is used in rtp_h264.c, which is
251 * forthcoming. */
3307e6ea 252int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
93993933 253 char *value, int value_size)
d0deedcb
RM
254{
255 skip_spaces(p);
c8965800 256 if (**p) {
d0deedcb
RM
257 get_word_sep(attr, attr_size, "=", p);
258 if (**p == '=')
259 (*p)++;
260 get_word_sep(value, value_size, ";", p);
261 if (**p == ';')
262 (*p)++;
263 return 1;
264 }
265 return 0;
266}
267
d1ccf0e0
RD
268/* parse a SDP line and save stream attributes */
269static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
270{
271 char attr[256];
373afbaf
RB
272 /* Vorbis setup headers can be up to 12KB and are sent base64
273 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
274 char value[16384];
d1ccf0e0 275 int i;
d1ccf0e0 276 RTSPStream *rtsp_st = st->priv_data;
01f4895c 277 AVCodecContext *codec = st->codec;
be73a544 278 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
279
280 /* loop on each attribute */
3307e6ea 281 while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
93993933 282 value, sizeof(value))) {
c8965800
RB
283 /* grab the codec extra_data from the config parameter of the fmtp
284 * line */
e6327fba
RB
285 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
286 attr, value);
d1ccf0e0
RD
287 /* Looking for a known attribute */
288 for (i = 0; attr_names[i].str; ++i) {
289 if (!strcasecmp(attr, attr_names[i].str)) {
c8965800
RB
290 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
291 *(int *)((char *)rtp_payload_data +
292 attr_names[i].offset) = atoi(value);
293 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
294 *(char **)((char *)rtp_payload_data +
295 attr_names[i].offset) = av_strdup(value);
bb270c08 296 }
93ced3e8 297 }
93ced3e8
FB
298 }
299}
300
debe86bf 301/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
31693e00
RM
302 * and end time.
303 * Used for seeking in the rtp stream.
304 */
305static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
306{
307 char buf[256];
308
309 skip_spaces(&p);
f7d78f36 310 if (!av_stristart(p, "npt=", &p))
31693e00
RM
311 return;
312
313 *start = AV_NOPTS_VALUE;
314 *end = AV_NOPTS_VALUE;
315
316 get_word_sep(buf, sizeof(buf), "-", &p);
317 *start = parse_date(buf, 1);
318 if (*p == '-') {
319 p++;
320 get_word_sep(buf, sizeof(buf), "-", &p);
321 *end = parse_date(buf, 1);
322 }
323// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
324// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
325}
326
93ced3e8
FB
327typedef struct SDPParseState {
328 /* SDP only */
329 struct in_addr default_ip;
c8965800
RB
330 int default_ttl;
331 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
332} SDPParseState;
333
334static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
335 int letter, const char *buf)
336{
8b1ab7bf 337 RTSPState *rt = s->priv_data;
1617ad97
FB
338 char buf1[64], st_type[64];
339 const char *p;
fb65d2ca
DP
340 enum CodecType codec_type;
341 int payload_type, i;
1617ad97
FB
342 AVStream *st;
343 RTSPStream *rtsp_st;
93ced3e8
FB
344 struct in_addr sdp_ip;
345 int ttl;
346
67c9cd69 347 dprintf(s, "sdp: %c='%s'\n", letter, buf);
1617ad97
FB
348
349 p = buf;
cb760a47
RB
350 if (s1->skip_media && letter != 'm')
351 return;
c8965800 352 switch (letter) {
93ced3e8
FB
353 case 'c':
354 get_word(buf1, sizeof(buf1), &p);
355 if (strcmp(buf1, "IN") != 0)
356 return;
357 get_word(buf1, sizeof(buf1), &p);
358 if (strcmp(buf1, "IP4") != 0)
359 return;
360 get_word_sep(buf1, sizeof(buf1), "/", &p);
ac11d562 361 if (ff_inet_aton(buf1, &sdp_ip) == 0)
93ced3e8
FB
362 return;
363 ttl = 16;
364 if (*p == '/') {
365 p++;
366 get_word_sep(buf1, sizeof(buf1), "/", &p);
367 ttl = atoi(buf1);
368 }
369 if (s->nb_streams == 0) {
370 s1->default_ip = sdp_ip;
371 s1->default_ttl = ttl;
372 } else {
373 st = s->streams[s->nb_streams - 1];
374 rtsp_st = st->priv_data;
375 rtsp_st->sdp_ip = sdp_ip;
376 rtsp_st->sdp_ttl = ttl;
377 }
378 break;
1617ad97 379 case 's':
da61e413 380 av_metadata_set(&s->metadata, "title", p);
1617ad97
FB
381 break;
382 case 'i':
383 if (s->nb_streams == 0) {
da61e413 384 av_metadata_set(&s->metadata, "comment", p);
1617ad97
FB
385 break;
386 }
387 break;
388 case 'm':
389 /* new stream */
cb760a47 390 s1->skip_media = 0;
1617ad97
FB
391 get_word(st_type, sizeof(st_type), &p);
392 if (!strcmp(st_type, "audio")) {
393 codec_type = CODEC_TYPE_AUDIO;
394 } else if (!strcmp(st_type, "video")) {
395 codec_type = CODEC_TYPE_VIDEO;
090438cc
RB
396 } else if (!strcmp(st_type, "application")) {
397 codec_type = CODEC_TYPE_DATA;
1617ad97 398 } else {
cb760a47 399 s1->skip_media = 1;
1617ad97
FB
400 return;
401 }
1617ad97
FB
402 rtsp_st = av_mallocz(sizeof(RTSPStream));
403 if (!rtsp_st)
404 return;
8b1ab7bf
FB
405 rtsp_st->stream_index = -1;
406 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
407
408 rtsp_st->sdp_ip = s1->default_ip;
409 rtsp_st->sdp_ttl = s1->default_ttl;
410
93ced3e8
FB
411 get_word(buf1, sizeof(buf1), &p); /* port */
412 rtsp_st->sdp_port = atoi(buf1);
413
414 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 415
93ced3e8
FB
416 /* XXX: handle list of formats */
417 get_word(buf1, sizeof(buf1), &p); /* format list */
418 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 419
7ed19d7f 420 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
421 /* no corresponding stream */
422 } else {
423 st = av_new_stream(s, 0);
424 if (!st)
425 return;
426 st->priv_data = rtsp_st;
427 rtsp_st->stream_index = st->index;
01f4895c 428 st->codec->codec_type = codec_type;
d1ccf0e0 429 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 430 /* if standard payload type, we can find the codec right now */
bf6d9818 431 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
432 }
433 }
1617ad97 434 /* put a default control url */
00eb13e0 435 av_strlcpy(rtsp_st->control_url, rt->control_uri,
c8965800 436 sizeof(rtsp_st->control_url));
1617ad97
FB
437 break;
438 case 'a':
00eb13e0
AS
439 if (av_strstart(p, "control:", &p)) {
440 if (s->nb_streams == 0) {
441 if (!strncmp(p, "rtsp://", 7))
442 av_strlcpy(rt->control_uri, p,
443 sizeof(rt->control_uri));
444 } else {
1617ad97
FB
445 char proto[32];
446 /* get the control url */
447 st = s->streams[s->nb_streams - 1];
448 rtsp_st = st->priv_data;
115329f1 449
1617ad97 450 /* XXX: may need to add full url resolution */
c5c6e67c 451 ff_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
f984dcf6 452 NULL, NULL, 0, p);
1617ad97
FB
453 if (proto[0] == '\0') {
454 /* relative control URL */
00eb13e0 455 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
c8965800
RB
456 av_strlcat(rtsp_st->control_url, "/",
457 sizeof(rtsp_st->control_url));
458 av_strlcat(rtsp_st->control_url, p,
459 sizeof(rtsp_st->control_url));
460 } else
461 av_strlcpy(rtsp_st->control_url, p,
462 sizeof(rtsp_st->control_url));
00eb13e0 463 }
83d14c85 464 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 465 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 466 get_word(buf1, sizeof(buf1), &p);
93ced3e8 467 payload_type = atoi(buf1);
83d14c85 468 st = s->streams[s->nb_streams - 1];
ff16f551 469 rtsp_st = st->priv_data;
8f3c87f3 470 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
f7d78f36 471 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 472 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 473 get_word(buf1, sizeof(buf1), &p);
93ced3e8 474 payload_type = atoi(buf1);
c8965800
RB
475 for (i = 0; i < s->nb_streams; i++) {
476 st = s->streams[i];
93ced3e8
FB
477 rtsp_st = st->priv_data;
478 if (rtsp_st->sdp_payload_type == payload_type) {
c8965800
RB
479 if (!(rtsp_st->dynamic_handler &&
480 rtsp_st->dynamic_handler->parse_sdp_a_line &&
481 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
482 i, rtsp_st->dynamic_protocol_context, buf)))
ed787542 483 sdp_parse_fmtp(st, p);
93ced3e8
FB
484 }
485 }
c8965800 486 } else if (av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
487 // let dynamic protocol handlers have a stab at the line.
488 get_word(buf1, sizeof(buf1), &p);
489 payload_type = atoi(buf1);
c8965800
RB
490 for (i = 0; i < s->nb_streams; i++) {
491 st = s->streams[i];
d0deedcb 492 rtsp_st = st->priv_data;
c8965800
RB
493 if (rtsp_st->sdp_payload_type == payload_type &&
494 rtsp_st->dynamic_handler &&
495 rtsp_st->dynamic_handler->parse_sdp_a_line)
496 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
497 rtsp_st->dynamic_protocol_context, buf);
d0deedcb 498 }
c8965800 499 } else if (av_strstart(p, "range:", &p)) {
31693e00
RM
500 int64_t start, end;
501
502 // this is so that seeking on a streamed file can work.
503 rtsp_parse_range_npt(p, &start, &end);
c8965800
RB
504 s->start_time = start;
505 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
506 s->duration = (end == AV_NOPTS_VALUE) ?
507 AV_NOPTS_VALUE : end - start;
119b4668
RB
508 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
509 if (atoi(p) == 1)
510 rt->transport = RTSP_TRANSPORT_RDT;
1a30d541
RB
511 } else {
512 if (rt->server_type == RTSP_SERVER_WMS)
513 ff_wms_parse_sdp_a_line(s, p);
514 if (s->nb_streams > 0) {
c4a3d032
RB
515 if (rt->server_type == RTSP_SERVER_REAL)
516 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
517
518 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
519 if (rtsp_st->dynamic_handler &&
520 rtsp_st->dynamic_handler->parse_sdp_a_line)
c8965800
RB
521 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
522 s->nb_streams - 1,
c4a3d032 523 rtsp_st->dynamic_protocol_context, buf);
1a30d541 524 }
1617ad97
FB
525 }
526 break;
527 }
528}
529
5c91a675 530static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
531{
532 const char *p;
533 int letter;
9211bcdd
RB
534 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
535 * contain long SDP lines containing complete ASF Headers (several
536 * kB) or arrays of MDPR (RM stream descriptor) headers plus
537 * "rulebooks" describing their properties. Therefore, the SDP line
373afbaf
RB
538 * buffer is large.
539 *
540 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
541 char buf[16384], *q;
93ced3e8 542 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 543
93ced3e8 544 memset(s1, 0, sizeof(SDPParseState));
1617ad97 545 p = content;
c8965800 546 for (;;) {
1617ad97
FB
547 skip_spaces(&p);
548 letter = *p;
549 if (letter == '\0')
550 break;
551 p++;
552 if (*p != '=')
553 goto next_line;
554 p++;
555 /* get the content */
556 q = buf;
b6892136 557 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
558 if ((q - buf) < sizeof(buf) - 1)
559 *q++ = *p;
560 p++;
561 }
562 *q = '\0';
93ced3e8 563 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
564 next_line:
565 while (*p != '\n' && *p != '\0')
566 p++;
567 if (*p == '\n')
568 p++;
569 }
570 return 0;
571}
572
1ced9da3 573/* close and free RTSP streams */
3307e6ea 574void ff_rtsp_close_streams(AVFormatContext *s)
1ced9da3 575{
52aa4338 576 RTSPState *rt = s->priv_data;
1ced9da3
LA
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) {
fd450a51
MS
584 if (s->oformat) {
585 AVFormatContext *rtpctx = rtsp_st->transport_priv;
586 av_write_trailer(rtpctx);
b7dc88fc
MS
587 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
588 uint8_t *ptr;
589 url_close_dyn_buf(rtpctx->pb, &ptr);
590 av_free(ptr);
591 } else {
685e76b5 592 url_fclose(rtpctx->pb);
b7dc88fc 593 }
f86f6656
MS
594 av_metadata_free(&rtpctx->streams[0]->metadata);
595 av_metadata_free(&rtpctx->metadata);
fd450a51
MS
596 av_free(rtpctx->streams[0]);
597 av_free(rtpctx);
598 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
599 ff_rdt_parse_close(rtsp_st->transport_priv);
600 else
601 rtp_parse_close(rtsp_st->transport_priv);
602 }
603 if (rtsp_st->rtp_handle)
604 url_close(rtsp_st->rtp_handle);
605 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
606 rtsp_st->dynamic_handler->close(
607 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
608 }
609 }
610 av_free(rt->rtsp_streams);
611 if (rt->asf_ctx) {
612 av_close_input_stream (rt->asf_ctx);
613 rt->asf_ctx = NULL;
614 }
1ced9da3
LA
615}
616
5c7fd910
MS
617static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
618 URLContext *handle)
619{
c07c6f81 620 RTSPState *rt = s->priv_data;
fd450a51
MS
621 AVFormatContext *rtpctx;
622 int ret;
623 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
624
625 if (!rtp_format)
626 return NULL;
627
628 /* Allocate an AVFormatContext for each output stream */
629 rtpctx = avformat_alloc_context();
630 if (!rtpctx)
631 return NULL;
632
633 rtpctx->oformat = rtp_format;
634 if (!av_new_stream(rtpctx, 0)) {
635 av_free(rtpctx);
636 return NULL;
637 }
638 /* Copy the max delay setting; the rtp muxer reads this. */
639 rtpctx->max_delay = s->max_delay;
640 /* Copy other stream parameters. */
641 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
642
c07c6f81
MS
643 /* Set the synchronized start time. */
644 rtpctx->start_time_realtime = rt->start_time;
645
fd450a51
MS
646 /* Remove the local codec, link to the original codec
647 * context instead, to give the rtp muxer access to
648 * codec parameters. */
649 av_free(rtpctx->streams[0]->codec);
650 rtpctx->streams[0]->codec = st->codec;
651
b7dc88fc 652 if (handle) {
685e76b5 653 url_fdopen(&rtpctx->pb, handle);
b7dc88fc
MS
654 } else
655 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
fd450a51
MS
656 ret = av_write_header(rtpctx);
657
658 if (ret) {
b7dc88fc 659 if (handle) {
685e76b5 660 url_fclose(rtpctx->pb);
b7dc88fc
MS
661 } else {
662 uint8_t *ptr;
663 url_close_dyn_buf(rtpctx->pb, &ptr);
664 av_free(ptr);
665 }
fd450a51
MS
666 av_free(rtpctx->streams[0]);
667 av_free(rtpctx);
668 return NULL;
669 }
670
671 /* Copy the RTP AVStream timebase back to the original AVStream */
672 st->time_base = rtpctx->streams[0]->time_base;
673 return rtpctx;
674}
675
c8965800 676static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
677{
678 RTSPState *rt = s->priv_data;
679 AVStream *st = NULL;
680
681 /* open the RTP context */
682 if (rtsp_st->stream_index >= 0)
683 st = s->streams[rtsp_st->stream_index];
684 if (!st)
685 s->ctx_flags |= AVFMTCTX_NOHEADER;
686
fd450a51
MS
687 if (s->oformat) {
688 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
689 /* Ownage of rtp_handle is passed to the rtp mux context */
690 rtsp_st->rtp_handle = NULL;
691 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
692 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
693 rtsp_st->dynamic_protocol_context,
694 rtsp_st->dynamic_handler);
695 else
696 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
697 rtsp_st->sdp_payload_type,
698 &rtsp_st->rtp_payload_data);
699
700 if (!rtsp_st->transport_priv) {
701 return AVERROR(ENOMEM);
702 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 703 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
704 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
705 rtsp_st->dynamic_protocol_context,
706 rtsp_st->dynamic_handler);
707 }
708 }
709
710 return 0;
711}
712
6f5a3d0a 713#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
1ced9da3
LA
714static int rtsp_probe(AVProbeData *p)
715{
716 if (av_strstart(p->filename, "rtsp:", NULL))
717 return AVPROBE_SCORE_MAX;
718 return 0;
719}
720
1617ad97
FB
721static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
722{
723 const char *p;
724 int v;
725
726 p = *pp;
727 skip_spaces(&p);
728 v = strtol(p, (char **)&p, 10);
729 if (*p == '-') {
730 p++;
731 *min_ptr = v;
732 v = strtol(p, (char **)&p, 10);
733 *max_ptr = v;
734 } else {
735 *min_ptr = v;
736 *max_ptr = v;
737 }
738 *pp = p;
739}
740
741/* XXX: only one transport specification is parsed */
a9e534d5 742static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
743{
744 char transport_protocol[16];
745 char profile[16];
746 char lower_transport[16];
747 char parameter[16];
748 RTSPTransportField *th;
749 char buf[256];
115329f1 750
1617ad97 751 reply->nb_transports = 0;
115329f1 752
c8965800 753 for (;;) {
1617ad97
FB
754 skip_spaces(&p);
755 if (*p == '\0')
756 break;
757
758 th = &reply->transports[reply->nb_transports];
759
115329f1 760 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 761 "/", &p);
e1502118 762 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
763 get_word_sep(profile, sizeof(profile), "/;,", &p);
764 lower_transport[0] = '\0';
765 /* rtp/avp/<protocol> */
766 if (*p == '/') {
7ecc634e
LB
767 get_word_sep(lower_transport, sizeof(lower_transport),
768 ";,", &p);
119b4668
RB
769 }
770 th->transport = RTSP_TRANSPORT_RTP;
771 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
772 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 773 /* x-pn-tng/<protocol> */
e1502118
LB
774 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
775 profile[0] = '\0';
119b4668 776 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 777 }
b6892136 778 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 779 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 780 else
90abbdba 781 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 782
1617ad97
FB
783 if (*p == ';')
784 p++;
785 /* get each parameter */
786 while (*p != '\0' && *p != ',') {
787 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
788 if (!strcmp(parameter, "port")) {
789 if (*p == '=') {
790 p++;
791 rtsp_parse_range(&th->port_min, &th->port_max, &p);
792 }
793 } else if (!strcmp(parameter, "client_port")) {
794 if (*p == '=') {
795 p++;
115329f1 796 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
797 &th->client_port_max, &p);
798 }
799 } else if (!strcmp(parameter, "server_port")) {
800 if (*p == '=') {
801 p++;
115329f1 802 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
803 &th->server_port_max, &p);
804 }
805 } else if (!strcmp(parameter, "interleaved")) {
806 if (*p == '=') {
807 p++;
115329f1 808 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
809 &th->interleaved_max, &p);
810 }
811 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
812 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
813 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
814 } else if (!strcmp(parameter, "ttl")) {
815 if (*p == '=') {
816 p++;
817 th->ttl = strtol(p, (char **)&p, 10);
818 }
819 } else if (!strcmp(parameter, "destination")) {
820 struct in_addr ipaddr;
821
822 if (*p == '=') {
823 p++;
824 get_word_sep(buf, sizeof(buf), ";,", &p);
ac11d562 825 if (ff_inet_aton(buf, &ipaddr))
1617ad97
FB
826 th->destination = ntohl(ipaddr.s_addr);
827 }
828 }
829 while (*p != ';' && *p != '\0' && *p != ',')
830 p++;
831 if (*p == ';')
832 p++;
833 }
834 if (*p == ',')
835 p++;
836
837 reply->nb_transports++;
838 }
839}
840
2626308a
MS
841void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
842 HTTPAuthState *auth_state)
1617ad97
FB
843{
844 const char *p;
845
846 /* NOTE: we do case independent match for broken servers */
847 p = buf;
f7d78f36 848 if (av_stristart(p, "Session:", &p)) {
30e79845 849 int t;
1617ad97 850 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
851 if (av_stristart(p, ";timeout=", &p) &&
852 (t = strtol(p, NULL, 10)) > 0) {
853 reply->timeout = t;
854 }
f7d78f36 855 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 856 reply->content_length = strtol(p, NULL, 10);
f7d78f36 857 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 858 rtsp_parse_transport(reply, p);
f7d78f36 859 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 860 reply->seq = strtol(p, NULL, 10);
f7d78f36 861 } else if (av_stristart(p, "Range:", &p)) {
31693e00 862 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
863 } else if (av_stristart(p, "RealChallenge1:", &p)) {
864 skip_spaces(&p);
865 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
866 } else if (av_stristart(p, "Server:", &p)) {
867 skip_spaces(&p);
868 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
869 } else if (av_stristart(p, "Notice:", &p) ||
870 av_stristart(p, "X-Notice:", &p)) {
871 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
872 } else if (av_stristart(p, "Location:", &p)) {
873 skip_spaces(&p);
874 av_strlcpy(reply->location, p , sizeof(reply->location));
2626308a
MS
875 } else if (av_stristart(p, "WWW-Authenticate:", &p) && auth_state) {
876 skip_spaces(&p);
877 ff_http_auth_handle_header(auth_state, "WWW-Authenticate", p);
878 } else if (av_stristart(p, "Authentication-Info:", &p) && auth_state) {
879 skip_spaces(&p);
880 ff_http_auth_handle_header(auth_state, "Authentication-Info", p);
1617ad97
FB
881 }
882}
883
b7b8fc34 884/* skip a RTP/TCP interleaved packet */
ec55edba 885void ff_rtsp_skip_packet(AVFormatContext *s)
b7b8fc34
FB
886{
887 RTSPState *rt = s->priv_data;
888 int ret, len, len1;
889 uint8_t buf[1024];
890
0e848977 891 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
892 if (ret != 3)
893 return;
80fb8234 894 len = AV_RB16(buf + 1);
67c9cd69
BC
895
896 dprintf(s, "skipping RTP packet len=%d\n", len);
897
b7b8fc34
FB
898 /* skip payload */
899 while (len > 0) {
900 len1 = len;
901 if (len1 > sizeof(buf))
902 len1 = sizeof(buf);
0e848977 903 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
904 if (ret != len1)
905 return;
906 len -= len1;
907 }
908}
1617ad97 909
3307e6ea 910int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
93993933
MS
911 unsigned char **content_ptr,
912 int return_on_interleaved_data)
1617ad97
FB
913{
914 RTSPState *rt = s->priv_data;
915 char buf[4096], buf1[1024], *q;
916 unsigned char ch;
917 const char *p;
7e726132 918 int ret, content_length, line_count = 0;
1617ad97
FB
919 unsigned char *content = NULL;
920
d541a7d2 921 memset(reply, 0, sizeof(*reply));
1617ad97 922
1617ad97 923 /* parse reply (XXX: use buffers) */
1617ad97 924 rt->last_reply[0] = '\0';
c8965800 925 for (;;) {
1617ad97 926 q = buf;
c8965800 927 for (;;) {
0e848977 928 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 929#ifdef DEBUG_RTP_TCP
67c9cd69 930 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
931#endif
932 if (ret != 1)
933 return -1;
1617ad97
FB
934 if (ch == '\n')
935 break;
b7b8fc34
FB
936 if (ch == '$') {
937 /* XXX: only parse it if first char on line ? */
7e726132
RB
938 if (return_on_interleaved_data) {
939 return 1;
940 } else
ec55edba 941 ff_rtsp_skip_packet(s);
b7b8fc34 942 } else if (ch != '\r') {
1617ad97
FB
943 if ((q - buf) < sizeof(buf) - 1)
944 *q++ = ch;
945 }
946 }
947 *q = '\0';
67c9cd69
BC
948
949 dprintf(s, "line='%s'\n", buf);
950
1617ad97
FB
951 /* test if last line */
952 if (buf[0] == '\0')
953 break;
954 p = buf;
955 if (line_count == 0) {
956 /* get reply code */
957 get_word(buf1, sizeof(buf1), &p);
958 get_word(buf1, sizeof(buf1), &p);
959 reply->status_code = atoi(buf1);
960 } else {
2626308a 961 ff_rtsp_parse_line(reply, p, &rt->auth_state);
75e61b0e
MR
962 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
963 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
964 }
965 line_count++;
966 }
115329f1 967
1617ad97 968 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 969 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 970
1617ad97
FB
971 content_length = reply->content_length;
972 if (content_length > 0) {
973 /* leave some room for a trailing '\0' (useful for simple parsing) */
974 content = av_malloc(content_length + 1);
0e848977 975 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
976 content[content_length] = '\0';
977 }
978 if (content_ptr)
979 *content_ptr = content;
e2e2e7dd
AB
980 else
981 av_free(content);
7e726132 982
7ed8211b
LB
983 if (rt->seq != reply->seq) {
984 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
985 rt->seq, reply->seq);
986 }
987
fccb1770
RB
988 /* EOS */
989 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
990 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 991 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 992 rt->state = RTSP_STATE_IDLE;
c8965800 993 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 994 return AVERROR(EIO); /* data or server error */
c8965800 995 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
996 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
997 return AVERROR(EPERM);
998
7e726132 999 return 0;
1617ad97
FB
1000}
1001
3307e6ea 1002void ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
b17d11c6
MS
1003 const char *method, const char *url,
1004 const char *headers,
93993933
MS
1005 const unsigned char *send_content,
1006 int send_content_length)
29b9f58b
RB
1007{
1008 RTSPState *rt = s->priv_data;
1009 char buf[4096], buf1[1024];
1010
1011 rt->seq++;
b17d11c6
MS
1012 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1013 if (headers)
1014 av_strlcat(buf, headers, sizeof(buf));
29b9f58b
RB
1015 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1016 av_strlcat(buf, buf1, sizeof(buf));
b17d11c6
MS
1017 if (rt->session_id[0] != '\0' && (!headers ||
1018 !strstr(headers, "\nIf-Match:"))) {
29b9f58b
RB
1019 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
1020 av_strlcat(buf, buf1, sizeof(buf));
1021 }
aa8bf2fb
MS
1022 if (rt->auth[0]) {
1023 char *str = ff_http_auth_create_response(&rt->auth_state,
1024 rt->auth, url, method);
1025 if (str)
1026 av_strlcat(buf, str, sizeof(buf));
1027 av_free(str);
1028 }
dfd017bf
MS
1029 if (send_content_length > 0 && send_content)
1030 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 1031 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
1032
1033 dprintf(s, "Sending:\n%s--\n", buf);
1034
29b9f58b 1035 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
1036 if (send_content_length > 0 && send_content)
1037 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
1038 rt->last_cmd_time = av_gettime();
1039}
1040
b17d11c6
MS
1041void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1042 const char *url, const char *headers)
dfd017bf 1043{
b17d11c6 1044 ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
dfd017bf
MS
1045}
1046
b17d11c6
MS
1047void ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1048 const char *headers, RTSPMessageHeader *reply,
93993933 1049 unsigned char **content_ptr)
30e79845 1050{
b17d11c6
MS
1051 ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1052 content_ptr, NULL, 0);
29b9f58b
RB
1053}
1054
3307e6ea 1055void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
b17d11c6
MS
1056 const char *method, const char *url,
1057 const char *header,
e9fea405
MS
1058 RTSPMessageHeader *reply,
1059 unsigned char **content_ptr,
1060 const unsigned char *send_content,
1061 int send_content_length)
dfd017bf 1062{
30af0779
MS
1063 RTSPState *rt = s->priv_data;
1064 HTTPAuthType cur_auth_type;
1065
1066retry:
1067 cur_auth_type = rt->auth_state.auth_type;
b17d11c6
MS
1068 ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1069 send_content, send_content_length);
dfd017bf 1070
3307e6ea 1071 ff_rtsp_read_reply(s, reply, content_ptr, 0);
30af0779
MS
1072
1073 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1074 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1075 goto retry;
dfd017bf
MS
1076}
1077
53620bba
RB
1078/**
1079 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1080 */
c8965800
RB
1081static int make_setup_request(AVFormatContext *s, const char *host, int port,
1082 int lower_transport, const char *real_challenge)
1617ad97
FB
1083{
1084 RTSPState *rt = s->priv_data;
f830c9a4 1085 int rtx, j, i, err, interleave = 0;
1617ad97 1086 RTSPStream *rtsp_st;
a9e534d5 1087 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1088 char cmd[2048];
e9dea59f
RB
1089 const char *trans_pref;
1090
119b4668 1091 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1092 trans_pref = "x-pn-tng";
1093 else
1094 trans_pref = "RTP/AVP";
115329f1 1095
30e79845
RB
1096 /* default timeout: 1 minute */
1097 rt->timeout = 60;
1098
1617ad97
FB
1099 /* for each stream, make the setup request */
1100 /* XXX: we assume the same server is used for the control of each
c8965800 1101 * RTSP stream */
d1ccf0e0 1102
c8965800 1103 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1104 char transport[2048];
1105
f830c9a4
RB
1106 /**
1107 * WMS serves all UDP data over a single connection, the RTX, which
1108 * isn't necessarily the first in the SDP but has to be the first
1109 * to be set up, else the second/third SETUP will fail with a 461.
1110 */
1111 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1112 rt->server_type == RTSP_SERVER_WMS) {
1113 if (i == 0) {
1114 /* rtx first */
1115 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1116 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1117 if (len >= 4 &&
c8965800
RB
1118 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1119 "/rtx"))
f830c9a4
RB
1120 break;
1121 }
1122 if (rtx == rt->nb_rtsp_streams)
1123 return -1; /* no RTX found */
1124 rtsp_st = rt->rtsp_streams[rtx];
1125 } else
1126 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1127 } else
2fea9650 1128 rtsp_st = rt->rtsp_streams[i];
1617ad97 1129
1617ad97 1130 /* RTP/UDP */
90abbdba 1131 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1132 char buf[256];
85fb7b34 1133
f830c9a4
RB
1134 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1135 port = reply->transports[0].client_port_min;
1136 goto have_port;
1137 }
1138
85fb7b34 1139 /* first try in specified port range */
d1ccf0e0 1140 if (RTSP_RTP_PORT_MIN != 0) {
c8965800 1141 while (j <= RTSP_RTP_PORT_MAX) {
57b5555c
MS
1142 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1143 "?localport=%d", j);
c8965800
RB
1144 /* we will use two ports per rtp stream (rtp and rtcp) */
1145 j += 2;
1146 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1147 goto rtp_opened;
1148 }
1617ad97 1149 }
85fb7b34 1150
c8965800
RB
1151#if 0
1152 /* then try on any port */
1153 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1154 err = AVERROR_INVALIDDATA;
1155 goto fail;
1156 }
1157#endif
85fb7b34
FB
1158
1159 rtp_opened:
8b1ab7bf 1160 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1161 have_port:
0ad306bc 1162 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1163 "%s/UDP;", trans_pref);
1164 if (rt->server_type != RTSP_SERVER_REAL)
1165 av_strlcat(transport, "unicast;", sizeof(transport));
1166 av_strlcatf(transport, sizeof(transport),
1167 "client_port=%d", port);
f830c9a4
RB
1168 if (rt->transport == RTSP_TRANSPORT_RTP &&
1169 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1170 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1171 }
1172
1173 /* RTP/TCP */
90abbdba 1174 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1175 /** For WMS streams, the application streams are only used for
1176 * UDP. When trying to set it up for TCP streams, the server
1177 * will return an error. Therefore, we skip those streams. */
1178 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1179 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1180 CODEC_TYPE_DATA)
090438cc 1181 continue;
0ad306bc 1182 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1183 "%s/TCP;", trans_pref);
1184 if (rt->server_type == RTSP_SERVER_WMS)
1185 av_strlcat(transport, "unicast;", sizeof(transport));
1186 av_strlcatf(transport, sizeof(transport),
1187 "interleaved=%d-%d",
1188 interleave, interleave + 1);
1189 interleave += 2;
1617ad97
FB
1190 }
1191
90abbdba 1192 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1193 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1194 "%s/UDP;multicast", trans_pref);
1617ad97 1195 }
69adcc4f
MS
1196 if (s->oformat) {
1197 av_strlcat(transport, ";mode=receive", sizeof(transport));
1198 } else if (rt->server_type == RTSP_SERVER_REAL ||
2efc97c2 1199 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1200 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1201 snprintf(cmd, sizeof(cmd),
b6892136 1202 "Transport: %s\r\n",
b17d11c6 1203 transport);
2e889ae4 1204 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1205 char real_res[41], real_csum[9];
1206 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1207 real_challenge);
1208 av_strlcatf(cmd, sizeof(cmd),
1209 "If-Match: %s\r\n"
1210 "RealChallenge2: %s, sd=%s\r\n",
1211 rt->session_id, real_res, real_csum);
1212 }
b17d11c6 1213 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
8a8754d8
RB
1214 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1215 err = 1;
1216 goto fail;
7e6ca34f
RB
1217 } else if (reply->status_code != RTSP_STATUS_OK ||
1218 reply->nb_transports != 1) {
1617ad97
FB
1219 err = AVERROR_INVALIDDATA;
1220 goto fail;
1221 }
1222
1223 /* XXX: same protocol for all streams is required */
1224 if (i > 0) {
119b4668
RB
1225 if (reply->transports[0].lower_transport != rt->lower_transport ||
1226 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1227 err = AVERROR_INVALIDDATA;
1228 goto fail;
1229 }
1230 } else {
90abbdba 1231 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1232 rt->transport = reply->transports[0].transport;
1617ad97
FB
1233 }
1234
1235 /* close RTP connection if not choosen */
90abbdba
RB
1236 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1237 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1238 url_close(rtsp_st->rtp_handle);
1239 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1240 }
1241
90abbdba
RB
1242 switch(reply->transports[0].lower_transport) {
1243 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1244 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1245 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1246 break;
115329f1 1247
c8965800
RB
1248 case RTSP_LOWER_TRANSPORT_UDP: {
1249 char url[1024];
1250
1251 /* XXX: also use address if specified */
57b5555c
MS
1252 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1253 reply->transports[0].server_port_min, NULL);
c8965800
RB
1254 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1255 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1256 err = AVERROR_INVALIDDATA;
1257 goto fail;
1617ad97 1258 }
9c8fa20d
MS
1259 /* Try to initialize the connection state in a
1260 * potential NAT router by sending dummy packets.
1261 * RTP/RTCP dummy packets are used for RDT, too.
1262 */
30ff7c5c 1263 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1264 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1265 break;
c8965800
RB
1266 }
1267 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1268 char url[1024];
1269 struct in_addr in;
1270 int port, ttl;
1271
1272 if (reply->transports[0].destination) {
1273 in.s_addr = htonl(reply->transports[0].destination);
1274 port = reply->transports[0].port_min;
1275 ttl = reply->transports[0].ttl;
1276 } else {
1277 in = rtsp_st->sdp_ip;
1278 port = rtsp_st->sdp_port;
1279 ttl = rtsp_st->sdp_ttl;
1280 }
57b5555c
MS
1281 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1282 port, "?ttl=%d", ttl);
c8965800
RB
1283 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1284 err = AVERROR_INVALIDDATA;
1285 goto fail;
1617ad97
FB
1286 }
1287 break;
1288 }
c8965800 1289 }
d1ccf0e0 1290
ee0cb67f 1291 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1292 goto fail;
1617ad97
FB
1293 }
1294
30e79845
RB
1295 if (reply->timeout > 0)
1296 rt->timeout = reply->timeout;
1297
2e889ae4 1298 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1299 rt->need_subscription = 1;
1300
53620bba
RB
1301 return 0;
1302
1303fail:
c8965800 1304 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1305 if (rt->rtsp_streams[i]->rtp_handle) {
1306 url_close(rt->rtsp_streams[i]->rtp_handle);
1307 rt->rtsp_streams[i]->rtp_handle = NULL;
1308 }
1309 }
53620bba
RB
1310 return err;
1311}
1312
1ced9da3
LA
1313static int rtsp_read_play(AVFormatContext *s)
1314{
1315 RTSPState *rt = s->priv_data;
1316 RTSPMessageHeader reply1, *reply = &reply1;
1317 char cmd[1024];
1318
1319 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1320
1321 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1322 if (rt->state == RTSP_STATE_PAUSED) {
b17d11c6 1323 cmd[0] = 0;
1ced9da3
LA
1324 } else {
1325 snprintf(cmd, sizeof(cmd),
1ced9da3 1326 "Range: npt=%0.3f-\r\n",
1ced9da3
LA
1327 (double)rt->seek_timestamp / AV_TIME_BASE);
1328 }
b17d11c6 1329 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
1ced9da3
LA
1330 if (reply->status_code != RTSP_STATUS_OK) {
1331 return -1;
1332 }
1333 }
c02fd3d2 1334 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1335 return 0;
1336}
1337
6e69f6c4 1338static int rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
e23d195d
MS
1339{
1340 RTSPState *rt = s->priv_data;
e23d195d
MS
1341 char cmd[1024];
1342 unsigned char *content = NULL;
1343 int ret;
1344
1345 /* describe the stream */
1346 snprintf(cmd, sizeof(cmd),
b17d11c6 1347 "Accept: application/sdp\r\n");
e23d195d
MS
1348 if (rt->server_type == RTSP_SERVER_REAL) {
1349 /**
1350 * The Require: attribute is needed for proper streaming from
1351 * Realmedia servers.
1352 */
1353 av_strlcat(cmd,
1354 "Require: com.real.retain-entity-for-setup\r\n",
1355 sizeof(cmd));
1356 }
b17d11c6 1357 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
e23d195d
MS
1358 if (!content)
1359 return AVERROR_INVALIDDATA;
1360 if (reply->status_code != RTSP_STATUS_OK) {
1361 av_freep(&content);
1362 return AVERROR_INVALIDDATA;
1363 }
1364
1365 /* now we got the SDP description, we parse it */
1366 ret = sdp_parse(s, (const char *)content);
1367 av_freep(&content);
1368 if (ret < 0)
1369 return AVERROR_INVALIDDATA;
1370
1371 return 0;
1372}
1373
26cb700c 1374static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
3e24c770
MS
1375{
1376 RTSPState *rt = s->priv_data;
1377 RTSPMessageHeader reply1, *reply = &reply1;
3e24c770
MS
1378 int i;
1379 char *sdp;
26cb700c 1380 AVFormatContext sdp_ctx, *ctx_array[1];
c07c6f81
MS
1381
1382 rt->start_time = av_gettime();
3e24c770
MS
1383
1384 /* Announce the stream */
3e24c770
MS
1385 sdp = av_mallocz(8192);
1386 if (sdp == NULL)
1387 return AVERROR(ENOMEM);
26cb700c
MS
1388 /* We create the SDP based on the RTSP AVFormatContext where we
1389 * aren't allowed to change the filename field. (We create the SDP
1390 * based on the RTSP context since the contexts for the RTP streams
1391 * don't exist yet.) In order to specify a custom URL with the actual
1392 * peer IP instead of the originally specified hostname, we create
1393 * a temporary copy of the AVFormatContext, where the custom URL is set.
1394 *
1395 * FIXME: Create the SDP without copying the AVFormatContext.
1396 * This either requires setting up the RTP stream AVFormatContexts
1397 * already here (complicating things immensely) or getting a more
1398 * flexible SDP creation interface.
1399 */
1400 sdp_ctx = *s;
1401 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1402 "rtsp", NULL, addr, -1, NULL);
1403 ctx_array[0] = &sdp_ctx;
1404 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
3e24c770
MS
1405 av_free(sdp);
1406 return AVERROR_INVALIDDATA;
1407 }
1408 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
b17d11c6
MS
1409 ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
1410 "Content-Type: application/sdp\r\n",
1411 reply, NULL, sdp, strlen(sdp));
3e24c770
MS
1412 av_free(sdp);
1413 if (reply->status_code != RTSP_STATUS_OK)
1414 return AVERROR_INVALIDDATA;
1415
1416 /* Set up the RTSPStreams for each AVStream */
1417 for (i = 0; i < s->nb_streams; i++) {
1418 RTSPStream *rtsp_st;
1419 AVStream *st = s->streams[i];
1420
1421 rtsp_st = av_mallocz(sizeof(RTSPStream));
1422 if (!rtsp_st)
1423 return AVERROR(ENOMEM);
1424 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1425
1426 st->priv_data = rtsp_st;
1427 rtsp_st->stream_index = i;
1428
db76ca7f 1429 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
3e24c770
MS
1430 /* Note, this must match the relative uri set in the sdp content */
1431 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1432 "/streamid=%d", i);
1433 }
1434
1435 return 0;
1436}
1437
3307e6ea 1438int ff_rtsp_connect(AVFormatContext *s)
53620bba
RB
1439{
1440 RTSPState *rt = s->priv_data;
921da217
LB
1441 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1442 char *option_list, *option, *filename;
53620bba 1443 URLContext *rtsp_hd;
03f8fc08 1444 int port, err, tcp_fd;
a9e534d5 1445 RTSPMessageHeader reply1, *reply = &reply1;
90abbdba 1446 int lower_transport_mask = 0;
1cf151e9 1447 char real_challenge[64];
03f8fc08
MS
1448 struct sockaddr_storage peer;
1449 socklen_t peer_len = sizeof(peer);
57b5555c
MS
1450
1451 if (!ff_network_init())
1452 return AVERROR(EIO);
c8965800 1453redirect:
53620bba 1454 /* extract hostname and port */
c5c6e67c 1455 ff_url_split(NULL, 0, auth, sizeof(auth),
f984dcf6 1456 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897 1457 if (*auth) {
aa8bf2fb 1458 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
f9337897 1459 }
53620bba
RB
1460 if (port < 0)
1461 port = RTSP_DEFAULT_PORT;
1462
1463 /* search for options */
602eb779 1464 option_list = strrchr(path, '?');
53620bba 1465 if (option_list) {
2a21adf9
MS
1466 /* Strip out the RTSP specific options, write out the rest of
1467 * the options back into the same string. */
1468 filename = option_list;
c8965800 1469 while (option_list) {
53620bba 1470 /* move the option pointer */
921da217 1471 option = ++option_list;
53620bba
RB
1472 option_list = strchr(option_list, '&');
1473 if (option_list)
921da217
LB
1474 *option_list = 0;
1475
53620bba 1476 /* handle the options */
c8965800 1477 if (!strcmp(option, "udp")) {
7a033e08 1478 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1479 } else if (!strcmp(option, "multicast")) {
7a033e08 1480 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1481 } else if (!strcmp(option, "tcp")) {
7a033e08 1482 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1483 } else {
2a21adf9
MS
1484 /* Write options back into the buffer, using memmove instead
1485 * of strcpy since the strings may overlap. */
1486 int len = strlen(option);
1487 memmove(++filename, option, len);
1488 filename += len;
921da217
LB
1489 if (option_list) *filename = '&';
1490 }
53620bba 1491 }
921da217 1492 *filename = 0;
53620bba
RB
1493 }
1494
90abbdba 1495 if (!lower_transport_mask)
2a1d51c5 1496 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba 1497
3e24c770 1498 if (s->oformat) {
b7dc88fc
MS
1499 /* Only UDP or TCP - UDP multicast isn't supported. */
1500 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1501 (1 << RTSP_LOWER_TRANSPORT_TCP);
3e24c770
MS
1502 if (!lower_transport_mask) {
1503 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
b7dc88fc 1504 "only UDP and TCP are supported for output.\n");
3e24c770
MS
1505 err = AVERROR(EINVAL);
1506 goto fail;
1507 }
1508 }
1509
53620bba 1510 /* open the tcp connexion */
57b5555c 1511 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
f9337897
RB
1512 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1513 err = AVERROR(EIO);
1514 goto fail;
1515 }
53620bba
RB
1516 rt->rtsp_hd = rtsp_hd;
1517 rt->seq = 0;
1518
03f8fc08
MS
1519 tcp_fd = url_get_file_handle(rtsp_hd);
1520 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1521 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1522 NULL, 0, NI_NUMERICHOST);
1523 }
1524
2a21adf9
MS
1525 /* Construct the URI used in request; this is similar to s->filename,
1526 * but with authentication credentials removed and RTSP specific options
1527 * stripped out. */
1528 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1529 host, port, "%s", path);
c8965800
RB
1530 /* request options supported by the server; this also detects server
1531 * type */
1cf151e9 1532 for (rt->server_type = RTSP_SERVER_RTP;;) {
b17d11c6 1533 cmd[0] = 0;
2e889ae4 1534 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1535 av_strlcat(cmd,
1536 /**
1537 * The following entries are required for proper
1538 * streaming from a Realmedia server. They are
1539 * interdependent in some way although we currently
1540 * don't quite understand how. Values were copied
1541 * from mplayer SVN r23589.
1542 * @param CompanyID is a 16-byte ID in base64
1543 * @param ClientChallenge is a 16-byte ID in hex
1544 */
1545 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1546 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1547 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1548 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1549 sizeof(cmd));
b17d11c6 1550 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1cf151e9
RB
1551 if (reply->status_code != RTSP_STATUS_OK) {
1552 err = AVERROR_INVALIDDATA;
1553 goto fail;
1554 }
1555
1556 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1557 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1558 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1559 continue;
7a86bafa
RB
1560 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1561 rt->server_type = RTSP_SERVER_WMS;
c8965800 1562 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1563 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1564 break;
1565 }
1566
3e24c770 1567 if (s->iformat)
6e69f6c4 1568 err = rtsp_setup_input_streams(s, reply);
3e24c770 1569 else
26cb700c 1570 err = rtsp_setup_output_streams(s, host);
e23d195d 1571 if (err)
53620bba 1572 goto fail;
53620bba 1573
8a8754d8 1574 do {
c8965800
RB
1575 int lower_transport = ff_log2_tab[lower_transport_mask &
1576 ~(lower_transport_mask - 1)];
8a8754d8 1577
90abbdba 1578 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1579 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1580 real_challenge : NULL);
8a8754d8 1581 if (err < 0)
7e6ca34f 1582 goto fail;
90abbdba
RB
1583 lower_transport_mask &= ~(1 << lower_transport);
1584 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1585 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1586 goto fail;
1587 }
1588 } while (err);
53620bba 1589
ff762d6e 1590 rt->state = RTSP_STATE_IDLE;
c8965800 1591 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1592 return 0;
1593 fail:
3307e6ea 1594 ff_rtsp_close_streams(s);
1617ad97 1595 url_close(rt->rtsp_hd);
35cfd646 1596 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
d243ba30
LB
1597 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1598 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1599 reply->status_code,
1600 s->filename);
1601 goto redirect;
1602 }
57b5555c 1603 ff_network_close();
1617ad97
FB
1604 return err;
1605}
6f5a3d0a 1606#endif
1617ad97 1607
6f5a3d0a 1608#if CONFIG_RTSP_DEMUXER
4280f9bb
MS
1609static int rtsp_read_header(AVFormatContext *s,
1610 AVFormatParameters *ap)
1611{
1612 RTSPState *rt = s->priv_data;
1613 int ret;
1614
3307e6ea 1615 ret = ff_rtsp_connect(s);
4280f9bb
MS
1616 if (ret)
1617 return ret;
1618
1619 if (ap->initial_pause) {
1620 /* do not start immediately */
1621 } else {
1622 if (rtsp_read_play(s) < 0) {
3307e6ea 1623 ff_rtsp_close_streams(s);
4280f9bb
MS
1624 url_close(rt->rtsp_hd);
1625 return AVERROR_INVALIDDATA;
1626 }
1627 }
1628
1629 return 0;
1630}
1631
0e59034e
RB
1632static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1633 uint8_t *buf, int buf_size)
1634{
1635 RTSPState *rt = s->priv_data;
1636 RTSPStream *rtsp_st;
1637 fd_set rfds;
1638 int fd, fd_max, n, i, ret, tcp_fd;
1639 struct timeval tv;
1640
c8965800 1641 for (;;) {
0e59034e
RB
1642 if (url_interrupt_cb())
1643 return AVERROR(EINTR);
1644 FD_ZERO(&rfds);
1645 if (rt->rtsp_hd) {
1646 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1647 FD_SET(tcp_fd, &rfds);
1648 } else {
1649 fd_max = 0;
1650 tcp_fd = -1;
1651 }
c8965800 1652 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1653 rtsp_st = rt->rtsp_streams[i];
1654 if (rtsp_st->rtp_handle) {
1655 /* currently, we cannot probe RTCP handle because of
1656 * blocking restrictions */
1657 fd = url_get_file_handle(rtsp_st->rtp_handle);
1658 if (fd > fd_max)
1659 fd_max = fd;
1660 FD_SET(fd, &rfds);
1661 }
1662 }
1663 tv.tv_sec = 0;
1664 tv.tv_usec = 100 * 1000;
1665 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1666 if (n > 0) {
c8965800 1667 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1668 rtsp_st = rt->rtsp_streams[i];
1669 if (rtsp_st->rtp_handle) {
1670 fd = url_get_file_handle(rtsp_st->rtp_handle);
1671 if (FD_ISSET(fd, &rfds)) {
1672 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1673 if (ret > 0) {
1674 *prtsp_st = rtsp_st;
1675 return ret;
1676 }
1677 }
1678 }
1679 }
1680#if CONFIG_RTSP_DEMUXER
27000636 1681 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1682 RTSPMessageHeader reply;
1683
3032276b
MS
1684 ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1685 if (ret < 0)
1686 return ret;
0e59034e 1687 /* XXX: parse message */
c02fd3d2 1688 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1689 return 0;
1690 }
1691#endif
1692 }
1693 }
1694}
1695
8b1ab7bf
FB
1696static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1697 uint8_t *buf, int buf_size)
1617ad97
FB
1698{
1699 RTSPState *rt = s->priv_data;
b6892136 1700 int id, len, i, ret;
1617ad97 1701 RTSPStream *rtsp_st;
1617ad97 1702
b6892136 1703#ifdef DEBUG_RTP_TCP
67c9cd69 1704 dprintf(s, "tcp_read_packet:\n");
b6892136 1705#endif
c8965800
RB
1706redo:
1707 for (;;) {
7e726132
RB
1708 RTSPMessageHeader reply;
1709
3307e6ea 1710 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
7e726132 1711 if (ret == -1)
8b1ab7bf 1712 return -1;
7e726132 1713 if (ret == 1) /* received '$' */
1617ad97 1714 break;
7e726132 1715 /* XXX: parse message */
c02fd3d2 1716 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1717 return 0;
1617ad97 1718 }
0e848977 1719 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1720 if (ret != 3)
8b1ab7bf 1721 return -1;
c8965800 1722 id = buf[0];
80fb8234 1723 len = AV_RB16(buf + 1);
b6892136 1724#ifdef DEBUG_RTP_TCP
67c9cd69 1725 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1726#endif
8b1ab7bf 1727 if (len > buf_size || len < 12)
1617ad97
FB
1728 goto redo;
1729 /* get the data */
0e848977 1730 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1731 if (ret != len)
8b1ab7bf 1732 return -1;
985b05d3 1733 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1734 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1735 return -1;
115329f1 1736
1617ad97 1737 /* find the matching stream */
c8965800 1738 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1739 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1740 if (id >= rtsp_st->interleaved_min &&
1741 id <= rtsp_st->interleaved_max)
1617ad97
FB
1742 goto found;
1743 }
1744 goto redo;
c8965800 1745found:
8b1ab7bf
FB
1746 *prtsp_st = rtsp_st;
1747 return len;
1617ad97
FB
1748}
1749
0e59034e
RB
1750static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1751{
1752 RTSPState *rt = s->priv_data;
1753 int ret, len;
1754 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1755 RTSPStream *rtsp_st;
1756
1757 /* get next frames from the same RTP packet */
1758 if (rt->cur_transport_priv) {
c8965800 1759 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1760 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1761 } else
0e59034e
RB
1762 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1763 if (ret == 0) {
1764 rt->cur_transport_priv = NULL;
1765 return 0;
1766 } else if (ret == 1) {
1767 return 0;
c8965800 1768 } else
0e59034e 1769 rt->cur_transport_priv = NULL;
0e59034e
RB
1770 }
1771
1772 /* read next RTP packet */
1773 redo:
1774 switch(rt->lower_transport) {
1775 default:
1776#if CONFIG_RTSP_DEMUXER
1777 case RTSP_LOWER_TRANSPORT_TCP:
1778 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1779 break;
1780#endif
1781 case RTSP_LOWER_TRANSPORT_UDP:
1782 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1783 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1784 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1785 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1786 break;
1787 }
1788 if (len < 0)
1789 return len;
1790 if (len == 0)
1791 return AVERROR_EOF;
c8965800 1792 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1793 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1794 } else
0e59034e
RB
1795 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1796 if (ret < 0)
1797 goto redo;
c8965800 1798 if (ret == 1)
0e59034e
RB
1799 /* more packets may follow, so we save the RTP context */
1800 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1801
1802 return ret;
1803}
1804
c8965800 1805static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1806{
1807 RTSPState *rt = s->priv_data;
98713182 1808 int ret;
30e79845
RB
1809 RTSPMessageHeader reply1, *reply = &reply1;
1810 char cmd[1024];
8b1ab7bf 1811
572c6a38 1812 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1813 int i;
572c6a38 1814 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1815
572c6a38
RB
1816 for (i = 0; i < s->nb_streams; i++)
1817 cache[i] = s->streams[i]->discard;
1818
1819 if (!rt->need_subscription) {
1820 if (memcmp (cache, rt->real_setup_cache,
1821 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1822 snprintf(cmd, sizeof(cmd),
7eaa646f 1823 "Unsubscribe: %s\r\n",
b17d11c6
MS
1824 rt->last_subscription);
1825 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1826 cmd, reply, NULL);
572c6a38
RB
1827 if (reply->status_code != RTSP_STATUS_OK)
1828 return AVERROR_INVALIDDATA;
1829 rt->need_subscription = 1;
1830 }
1256d16b 1831 }
1256d16b 1832
572c6a38
RB
1833 if (rt->need_subscription) {
1834 int r, rule_nr, first = 1;
1835
1836 memcpy(rt->real_setup_cache, cache,
1837 sizeof(enum AVDiscard) * s->nb_streams);
1838 rt->last_subscription[0] = 0;
1839
1840 snprintf(cmd, sizeof(cmd),
b17d11c6 1841 "Subscribe: ");
572c6a38
RB
1842 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1843 rule_nr = 0;
1844 for (r = 0; r < s->nb_streams; r++) {
1845 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1846 if (s->streams[r]->discard != AVDISCARD_ALL) {
1847 if (!first)
1848 av_strlcat(rt->last_subscription, ",",
1849 sizeof(rt->last_subscription));
1850 ff_rdt_subscribe_rule(
1851 rt->last_subscription,
1852 sizeof(rt->last_subscription), i, rule_nr);
1853 first = 0;
1854 }
1855 rule_nr++;
1856 }
1857 }
1858 }
1859 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
b17d11c6
MS
1860 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1861 cmd, reply, NULL);
572c6a38
RB
1862 if (reply->status_code != RTSP_STATUS_OK)
1863 return AVERROR_INVALIDDATA;
1864 rt->need_subscription = 0;
1865
c02fd3d2 1866 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1867 rtsp_read_play (s);
1868 }
1256d16b
RB
1869 }
1870
d7250724 1871 ret = rtsp_fetch_packet(s, pkt);
c8965800 1872 if (ret < 0)
98713182 1873 return ret;
30e79845
RB
1874
1875 /* send dummy request to keep TCP connection alive */
1876 if ((rt->server_type == RTSP_SERVER_WMS ||
1877 rt->server_type == RTSP_SERVER_REAL) &&
1878 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1879 if (rt->server_type == RTSP_SERVER_WMS) {
b17d11c6 1880 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
30e79845 1881 } else {
b17d11c6 1882 ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
30e79845
RB
1883 }
1884 }
1885
8b1ab7bf 1886 return 0;
1617ad97
FB
1887}
1888
ff762d6e
FB
1889/* pause the stream */
1890static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1891{
ff762d6e 1892 RTSPState *rt = s->priv_data;
a9e534d5 1893 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34 1894
b7b8fc34 1895 rt = s->priv_data;
115329f1 1896
c02fd3d2 1897 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1898 return 0;
2e889ae4 1899 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
b17d11c6 1900 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
99b2ac07
RB
1901 if (reply->status_code != RTSP_STATUS_OK) {
1902 return -1;
1903 }
1256d16b 1904 }
5f86057f
RB
1905 rt->state = RTSP_STATE_PAUSED;
1906 return 0;
b7b8fc34
FB
1907}
1908
115329f1 1909static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1910 int64_t timestamp, int flags)
ff762d6e
FB
1911{
1912 RTSPState *rt = s->priv_data;
115329f1 1913
c8965800
RB
1914 rt->seek_timestamp = av_rescale_q(timestamp,
1915 s->streams[stream_index]->time_base,
1916 AV_TIME_BASE_Q);
ff762d6e
FB
1917 switch(rt->state) {
1918 default:
1919 case RTSP_STATE_IDLE:
1920 break;
c02fd3d2 1921 case RTSP_STATE_STREAMING:
ec606b36
LB
1922 if (rtsp_read_pause(s) != 0)
1923 return -1;
1924 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1925 if (rtsp_read_play(s) != 0)
1926 return -1;
1927 break;
1928 case RTSP_STATE_PAUSED:
1929 rt->state = RTSP_STATE_IDLE;
1930 break;
1931 }
1932 return 0;
1933}
1934
1617ad97
FB
1935static int rtsp_read_close(AVFormatContext *s)
1936{
1937 RTSPState *rt = s->priv_data;
1617ad97 1938
b6892136 1939#if 0
1617ad97 1940 /* NOTE: it is valid to flush the buffer here */
90abbdba 1941 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1942 url_fclose(&rt->rtsp_gb);
1943 }
b6892136 1944#endif
b17d11c6 1945 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
1617ad97 1946
3307e6ea 1947 ff_rtsp_close_streams(s);
1617ad97 1948 url_close(rt->rtsp_hd);
57b5555c 1949 ff_network_close();
1617ad97
FB
1950 return 0;
1951}
1952
d2a067d1 1953AVInputFormat rtsp_demuxer = {
1617ad97 1954 "rtsp",
bde15e74 1955 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1956 sizeof(RTSPState),
1957 rtsp_probe,
1958 rtsp_read_header,
1959 rtsp_read_packet,
1960 rtsp_read_close,
ff762d6e 1961 rtsp_read_seek,
bb76a117 1962 .flags = AVFMT_NOFILE,
ff762d6e
FB
1963 .read_play = rtsp_read_play,
1964 .read_pause = rtsp_read_pause,
1617ad97 1965};
96862926 1966#endif
1617ad97 1967
cb1fdc61 1968static int sdp_probe(AVProbeData *p1)
93ced3e8 1969{
0e1ceacd 1970 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1971
1972 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1973 while (p < p_end && *p != '\0') {
c8965800
RB
1974 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1975 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1976 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1977
c8965800 1978 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1979 if (++p >= p_end)
cb1fdc61 1980 break;
cb1fdc61
FB
1981 if (*p == '\r')
1982 p++;
1983 }
93ced3e8
FB
1984 return 0;
1985}
1986
1987#define SDP_MAX_SIZE 8192
1988
c8965800 1989static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1990{
8b1ab7bf 1991 RTSPState *rt = s->priv_data;
93ced3e8
FB
1992 RTSPStream *rtsp_st;
1993 int size, i, err;
1994 char *content;
1995 char url[1024];
1996
57b5555c
MS
1997 if (!ff_network_init())
1998 return AVERROR(EIO);
1999
93ced3e8
FB
2000 /* read the whole sdp file */
2001 /* XXX: better loading */
2002 content = av_malloc(SDP_MAX_SIZE);
899681cd 2003 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
2004 if (size <= 0) {
2005 av_free(content);
2006 return AVERROR_INVALIDDATA;
2007 }
2008 content[size] ='\0';
2009
2010 sdp_parse(s, content);
2011 av_free(content);
2012
2013 /* open each RTP stream */
c8965800 2014 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 2015 rtsp_st = rt->rtsp_streams[i];
115329f1 2016
57b5555c
MS
2017 ff_url_join(url, sizeof(url), "rtp", NULL,
2018 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
2019 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
2020 rtsp_st->sdp_ttl);
dbf30963 2021 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
2022 err = AVERROR_INVALIDDATA;
2023 goto fail;
2024 }
ee0cb67f 2025 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 2026 goto fail;
93ced3e8
FB
2027 }
2028 return 0;
c8965800 2029fail:
3307e6ea 2030 ff_rtsp_close_streams(s);
57b5555c 2031 ff_network_close();
93ced3e8
FB
2032 return err;
2033}
2034
93ced3e8
FB
2035static int sdp_read_close(AVFormatContext *s)
2036{
3307e6ea 2037 ff_rtsp_close_streams(s);
57b5555c 2038 ff_network_close();
93ced3e8
FB
2039 return 0;
2040}
2041
ff70e601 2042AVInputFormat sdp_demuxer = {
93ced3e8 2043 "sdp",
bde15e74 2044 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
2045 sizeof(RTSPState),
2046 sdp_probe,
2047 sdp_read_header,
d7250724 2048 rtsp_fetch_packet,
93ced3e8
FB
2049 sdp_read_close,
2050};