Simplify ff_rtsp_send_cmd_with_content_async, remove an unnecessary buffer
[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
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
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;
7b4a3645 1009 char buf[4096];
29b9f58b
RB
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));
7b4a3645 1015 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
b17d11c6
MS
1016 if (rt->session_id[0] != '\0' && (!headers ||
1017 !strstr(headers, "\nIf-Match:"))) {
7b4a3645 1018 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
29b9f58b 1019 }
aa8bf2fb
MS
1020 if (rt->auth[0]) {
1021 char *str = ff_http_auth_create_response(&rt->auth_state,
1022 rt->auth, url, method);
1023 if (str)
1024 av_strlcat(buf, str, sizeof(buf));
1025 av_free(str);
1026 }
dfd017bf
MS
1027 if (send_content_length > 0 && send_content)
1028 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 1029 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
1030
1031 dprintf(s, "Sending:\n%s--\n", buf);
1032
29b9f58b 1033 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
1034 if (send_content_length > 0 && send_content)
1035 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
1036 rt->last_cmd_time = av_gettime();
1037}
1038
b17d11c6
MS
1039void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1040 const char *url, const char *headers)
dfd017bf 1041{
b17d11c6 1042 ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
dfd017bf
MS
1043}
1044
b17d11c6
MS
1045void ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1046 const char *headers, RTSPMessageHeader *reply,
93993933 1047 unsigned char **content_ptr)
30e79845 1048{
b17d11c6
MS
1049 ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1050 content_ptr, NULL, 0);
29b9f58b
RB
1051}
1052
3307e6ea 1053void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
b17d11c6
MS
1054 const char *method, const char *url,
1055 const char *header,
e9fea405
MS
1056 RTSPMessageHeader *reply,
1057 unsigned char **content_ptr,
1058 const unsigned char *send_content,
1059 int send_content_length)
dfd017bf 1060{
30af0779
MS
1061 RTSPState *rt = s->priv_data;
1062 HTTPAuthType cur_auth_type;
1063
1064retry:
1065 cur_auth_type = rt->auth_state.auth_type;
b17d11c6
MS
1066 ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1067 send_content, send_content_length);
dfd017bf 1068
3307e6ea 1069 ff_rtsp_read_reply(s, reply, content_ptr, 0);
30af0779
MS
1070
1071 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1072 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1073 goto retry;
dfd017bf
MS
1074}
1075
53620bba
RB
1076/**
1077 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1078 */
c8965800
RB
1079static int make_setup_request(AVFormatContext *s, const char *host, int port,
1080 int lower_transport, const char *real_challenge)
1617ad97
FB
1081{
1082 RTSPState *rt = s->priv_data;
f830c9a4 1083 int rtx, j, i, err, interleave = 0;
1617ad97 1084 RTSPStream *rtsp_st;
a9e534d5 1085 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1086 char cmd[2048];
e9dea59f
RB
1087 const char *trans_pref;
1088
119b4668 1089 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1090 trans_pref = "x-pn-tng";
1091 else
1092 trans_pref = "RTP/AVP";
115329f1 1093
30e79845
RB
1094 /* default timeout: 1 minute */
1095 rt->timeout = 60;
1096
1617ad97
FB
1097 /* for each stream, make the setup request */
1098 /* XXX: we assume the same server is used for the control of each
c8965800 1099 * RTSP stream */
d1ccf0e0 1100
c8965800 1101 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1102 char transport[2048];
1103
f830c9a4
RB
1104 /**
1105 * WMS serves all UDP data over a single connection, the RTX, which
1106 * isn't necessarily the first in the SDP but has to be the first
1107 * to be set up, else the second/third SETUP will fail with a 461.
1108 */
1109 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1110 rt->server_type == RTSP_SERVER_WMS) {
1111 if (i == 0) {
1112 /* rtx first */
1113 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1114 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1115 if (len >= 4 &&
c8965800
RB
1116 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1117 "/rtx"))
f830c9a4
RB
1118 break;
1119 }
1120 if (rtx == rt->nb_rtsp_streams)
1121 return -1; /* no RTX found */
1122 rtsp_st = rt->rtsp_streams[rtx];
1123 } else
1124 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1125 } else
2fea9650 1126 rtsp_st = rt->rtsp_streams[i];
1617ad97 1127
1617ad97 1128 /* RTP/UDP */
90abbdba 1129 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1130 char buf[256];
85fb7b34 1131
f830c9a4
RB
1132 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1133 port = reply->transports[0].client_port_min;
1134 goto have_port;
1135 }
1136
85fb7b34 1137 /* first try in specified port range */
d1ccf0e0 1138 if (RTSP_RTP_PORT_MIN != 0) {
c8965800 1139 while (j <= RTSP_RTP_PORT_MAX) {
57b5555c
MS
1140 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1141 "?localport=%d", j);
c8965800
RB
1142 /* we will use two ports per rtp stream (rtp and rtcp) */
1143 j += 2;
1144 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1145 goto rtp_opened;
1146 }
1617ad97 1147 }
85fb7b34 1148
c8965800
RB
1149#if 0
1150 /* then try on any port */
1151 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1152 err = AVERROR_INVALIDDATA;
1153 goto fail;
1154 }
1155#endif
85fb7b34
FB
1156
1157 rtp_opened:
8b1ab7bf 1158 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1159 have_port:
0ad306bc 1160 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1161 "%s/UDP;", trans_pref);
1162 if (rt->server_type != RTSP_SERVER_REAL)
1163 av_strlcat(transport, "unicast;", sizeof(transport));
1164 av_strlcatf(transport, sizeof(transport),
1165 "client_port=%d", port);
f830c9a4
RB
1166 if (rt->transport == RTSP_TRANSPORT_RTP &&
1167 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1168 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1169 }
1170
1171 /* RTP/TCP */
90abbdba 1172 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1173 /** For WMS streams, the application streams are only used for
1174 * UDP. When trying to set it up for TCP streams, the server
1175 * will return an error. Therefore, we skip those streams. */
1176 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1177 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1178 CODEC_TYPE_DATA)
090438cc 1179 continue;
0ad306bc 1180 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1181 "%s/TCP;", trans_pref);
1182 if (rt->server_type == RTSP_SERVER_WMS)
1183 av_strlcat(transport, "unicast;", sizeof(transport));
1184 av_strlcatf(transport, sizeof(transport),
1185 "interleaved=%d-%d",
1186 interleave, interleave + 1);
1187 interleave += 2;
1617ad97
FB
1188 }
1189
90abbdba 1190 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1191 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1192 "%s/UDP;multicast", trans_pref);
1617ad97 1193 }
69adcc4f
MS
1194 if (s->oformat) {
1195 av_strlcat(transport, ";mode=receive", sizeof(transport));
1196 } else if (rt->server_type == RTSP_SERVER_REAL ||
2efc97c2 1197 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1198 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1199 snprintf(cmd, sizeof(cmd),
b6892136 1200 "Transport: %s\r\n",
b17d11c6 1201 transport);
2e889ae4 1202 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1203 char real_res[41], real_csum[9];
1204 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1205 real_challenge);
1206 av_strlcatf(cmd, sizeof(cmd),
1207 "If-Match: %s\r\n"
1208 "RealChallenge2: %s, sd=%s\r\n",
1209 rt->session_id, real_res, real_csum);
1210 }
b17d11c6 1211 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
8a8754d8
RB
1212 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1213 err = 1;
1214 goto fail;
7e6ca34f
RB
1215 } else if (reply->status_code != RTSP_STATUS_OK ||
1216 reply->nb_transports != 1) {
1617ad97
FB
1217 err = AVERROR_INVALIDDATA;
1218 goto fail;
1219 }
1220
1221 /* XXX: same protocol for all streams is required */
1222 if (i > 0) {
119b4668
RB
1223 if (reply->transports[0].lower_transport != rt->lower_transport ||
1224 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1225 err = AVERROR_INVALIDDATA;
1226 goto fail;
1227 }
1228 } else {
90abbdba 1229 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1230 rt->transport = reply->transports[0].transport;
1617ad97
FB
1231 }
1232
1233 /* close RTP connection if not choosen */
90abbdba
RB
1234 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1235 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1236 url_close(rtsp_st->rtp_handle);
1237 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1238 }
1239
90abbdba
RB
1240 switch(reply->transports[0].lower_transport) {
1241 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1242 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1243 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1244 break;
115329f1 1245
c8965800
RB
1246 case RTSP_LOWER_TRANSPORT_UDP: {
1247 char url[1024];
1248
1249 /* XXX: also use address if specified */
57b5555c
MS
1250 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1251 reply->transports[0].server_port_min, NULL);
c8965800
RB
1252 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1253 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1254 err = AVERROR_INVALIDDATA;
1255 goto fail;
1617ad97 1256 }
9c8fa20d
MS
1257 /* Try to initialize the connection state in a
1258 * potential NAT router by sending dummy packets.
1259 * RTP/RTCP dummy packets are used for RDT, too.
1260 */
30ff7c5c 1261 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1262 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1263 break;
c8965800
RB
1264 }
1265 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1266 char url[1024];
1267 struct in_addr in;
1268 int port, ttl;
1269
1270 if (reply->transports[0].destination) {
1271 in.s_addr = htonl(reply->transports[0].destination);
1272 port = reply->transports[0].port_min;
1273 ttl = reply->transports[0].ttl;
1274 } else {
1275 in = rtsp_st->sdp_ip;
1276 port = rtsp_st->sdp_port;
1277 ttl = rtsp_st->sdp_ttl;
1278 }
57b5555c
MS
1279 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1280 port, "?ttl=%d", ttl);
c8965800
RB
1281 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1282 err = AVERROR_INVALIDDATA;
1283 goto fail;
1617ad97
FB
1284 }
1285 break;
1286 }
c8965800 1287 }
d1ccf0e0 1288
ee0cb67f 1289 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1290 goto fail;
1617ad97
FB
1291 }
1292
30e79845
RB
1293 if (reply->timeout > 0)
1294 rt->timeout = reply->timeout;
1295
2e889ae4 1296 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1297 rt->need_subscription = 1;
1298
53620bba
RB
1299 return 0;
1300
1301fail:
c8965800 1302 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1303 if (rt->rtsp_streams[i]->rtp_handle) {
1304 url_close(rt->rtsp_streams[i]->rtp_handle);
1305 rt->rtsp_streams[i]->rtp_handle = NULL;
1306 }
1307 }
53620bba
RB
1308 return err;
1309}
1310
1ced9da3
LA
1311static int rtsp_read_play(AVFormatContext *s)
1312{
1313 RTSPState *rt = s->priv_data;
1314 RTSPMessageHeader reply1, *reply = &reply1;
1315 char cmd[1024];
1316
1317 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1318
1319 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1320 if (rt->state == RTSP_STATE_PAUSED) {
b17d11c6 1321 cmd[0] = 0;
1ced9da3
LA
1322 } else {
1323 snprintf(cmd, sizeof(cmd),
1ced9da3 1324 "Range: npt=%0.3f-\r\n",
1ced9da3
LA
1325 (double)rt->seek_timestamp / AV_TIME_BASE);
1326 }
b17d11c6 1327 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
1ced9da3
LA
1328 if (reply->status_code != RTSP_STATUS_OK) {
1329 return -1;
1330 }
1331 }
c02fd3d2 1332 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1333 return 0;
1334}
1335
6e69f6c4 1336static int rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
e23d195d
MS
1337{
1338 RTSPState *rt = s->priv_data;
e23d195d
MS
1339 char cmd[1024];
1340 unsigned char *content = NULL;
1341 int ret;
1342
1343 /* describe the stream */
1344 snprintf(cmd, sizeof(cmd),
b17d11c6 1345 "Accept: application/sdp\r\n");
e23d195d
MS
1346 if (rt->server_type == RTSP_SERVER_REAL) {
1347 /**
1348 * The Require: attribute is needed for proper streaming from
1349 * Realmedia servers.
1350 */
1351 av_strlcat(cmd,
1352 "Require: com.real.retain-entity-for-setup\r\n",
1353 sizeof(cmd));
1354 }
b17d11c6 1355 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
e23d195d
MS
1356 if (!content)
1357 return AVERROR_INVALIDDATA;
1358 if (reply->status_code != RTSP_STATUS_OK) {
1359 av_freep(&content);
1360 return AVERROR_INVALIDDATA;
1361 }
1362
1363 /* now we got the SDP description, we parse it */
1364 ret = sdp_parse(s, (const char *)content);
1365 av_freep(&content);
1366 if (ret < 0)
1367 return AVERROR_INVALIDDATA;
1368
1369 return 0;
1370}
1371
26cb700c 1372static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
3e24c770
MS
1373{
1374 RTSPState *rt = s->priv_data;
1375 RTSPMessageHeader reply1, *reply = &reply1;
3e24c770
MS
1376 int i;
1377 char *sdp;
26cb700c 1378 AVFormatContext sdp_ctx, *ctx_array[1];
c07c6f81
MS
1379
1380 rt->start_time = av_gettime();
3e24c770
MS
1381
1382 /* Announce the stream */
3e24c770
MS
1383 sdp = av_mallocz(8192);
1384 if (sdp == NULL)
1385 return AVERROR(ENOMEM);
26cb700c
MS
1386 /* We create the SDP based on the RTSP AVFormatContext where we
1387 * aren't allowed to change the filename field. (We create the SDP
1388 * based on the RTSP context since the contexts for the RTP streams
1389 * don't exist yet.) In order to specify a custom URL with the actual
1390 * peer IP instead of the originally specified hostname, we create
1391 * a temporary copy of the AVFormatContext, where the custom URL is set.
1392 *
1393 * FIXME: Create the SDP without copying the AVFormatContext.
1394 * This either requires setting up the RTP stream AVFormatContexts
1395 * already here (complicating things immensely) or getting a more
1396 * flexible SDP creation interface.
1397 */
1398 sdp_ctx = *s;
1399 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1400 "rtsp", NULL, addr, -1, NULL);
1401 ctx_array[0] = &sdp_ctx;
1402 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
3e24c770
MS
1403 av_free(sdp);
1404 return AVERROR_INVALIDDATA;
1405 }
1406 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
b17d11c6
MS
1407 ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
1408 "Content-Type: application/sdp\r\n",
1409 reply, NULL, sdp, strlen(sdp));
3e24c770
MS
1410 av_free(sdp);
1411 if (reply->status_code != RTSP_STATUS_OK)
1412 return AVERROR_INVALIDDATA;
1413
1414 /* Set up the RTSPStreams for each AVStream */
1415 for (i = 0; i < s->nb_streams; i++) {
1416 RTSPStream *rtsp_st;
1417 AVStream *st = s->streams[i];
1418
1419 rtsp_st = av_mallocz(sizeof(RTSPStream));
1420 if (!rtsp_st)
1421 return AVERROR(ENOMEM);
1422 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1423
1424 st->priv_data = rtsp_st;
1425 rtsp_st->stream_index = i;
1426
db76ca7f 1427 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
3e24c770
MS
1428 /* Note, this must match the relative uri set in the sdp content */
1429 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1430 "/streamid=%d", i);
1431 }
1432
1433 return 0;
1434}
1435
3307e6ea 1436int ff_rtsp_connect(AVFormatContext *s)
53620bba
RB
1437{
1438 RTSPState *rt = s->priv_data;
921da217
LB
1439 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1440 char *option_list, *option, *filename;
53620bba 1441 URLContext *rtsp_hd;
03f8fc08 1442 int port, err, tcp_fd;
a9e534d5 1443 RTSPMessageHeader reply1, *reply = &reply1;
90abbdba 1444 int lower_transport_mask = 0;
1cf151e9 1445 char real_challenge[64];
03f8fc08
MS
1446 struct sockaddr_storage peer;
1447 socklen_t peer_len = sizeof(peer);
57b5555c
MS
1448
1449 if (!ff_network_init())
1450 return AVERROR(EIO);
c8965800 1451redirect:
53620bba 1452 /* extract hostname and port */
c5c6e67c 1453 ff_url_split(NULL, 0, auth, sizeof(auth),
f984dcf6 1454 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897 1455 if (*auth) {
aa8bf2fb 1456 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
f9337897 1457 }
53620bba
RB
1458 if (port < 0)
1459 port = RTSP_DEFAULT_PORT;
1460
1461 /* search for options */
602eb779 1462 option_list = strrchr(path, '?');
53620bba 1463 if (option_list) {
2a21adf9
MS
1464 /* Strip out the RTSP specific options, write out the rest of
1465 * the options back into the same string. */
1466 filename = option_list;
c8965800 1467 while (option_list) {
53620bba 1468 /* move the option pointer */
921da217 1469 option = ++option_list;
53620bba
RB
1470 option_list = strchr(option_list, '&');
1471 if (option_list)
921da217
LB
1472 *option_list = 0;
1473
53620bba 1474 /* handle the options */
c8965800 1475 if (!strcmp(option, "udp")) {
7a033e08 1476 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1477 } else if (!strcmp(option, "multicast")) {
7a033e08 1478 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1479 } else if (!strcmp(option, "tcp")) {
7a033e08 1480 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1481 } else {
2a21adf9
MS
1482 /* Write options back into the buffer, using memmove instead
1483 * of strcpy since the strings may overlap. */
1484 int len = strlen(option);
1485 memmove(++filename, option, len);
1486 filename += len;
921da217
LB
1487 if (option_list) *filename = '&';
1488 }
53620bba 1489 }
921da217 1490 *filename = 0;
53620bba
RB
1491 }
1492
90abbdba 1493 if (!lower_transport_mask)
2a1d51c5 1494 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba 1495
3e24c770 1496 if (s->oformat) {
b7dc88fc
MS
1497 /* Only UDP or TCP - UDP multicast isn't supported. */
1498 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1499 (1 << RTSP_LOWER_TRANSPORT_TCP);
3e24c770
MS
1500 if (!lower_transport_mask) {
1501 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
b7dc88fc 1502 "only UDP and TCP are supported for output.\n");
3e24c770
MS
1503 err = AVERROR(EINVAL);
1504 goto fail;
1505 }
1506 }
1507
53620bba 1508 /* open the tcp connexion */
57b5555c 1509 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
f9337897
RB
1510 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1511 err = AVERROR(EIO);
1512 goto fail;
1513 }
53620bba
RB
1514 rt->rtsp_hd = rtsp_hd;
1515 rt->seq = 0;
1516
03f8fc08
MS
1517 tcp_fd = url_get_file_handle(rtsp_hd);
1518 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1519 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1520 NULL, 0, NI_NUMERICHOST);
1521 }
1522
2a21adf9
MS
1523 /* Construct the URI used in request; this is similar to s->filename,
1524 * but with authentication credentials removed and RTSP specific options
1525 * stripped out. */
1526 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1527 host, port, "%s", path);
c8965800
RB
1528 /* request options supported by the server; this also detects server
1529 * type */
1cf151e9 1530 for (rt->server_type = RTSP_SERVER_RTP;;) {
b17d11c6 1531 cmd[0] = 0;
2e889ae4 1532 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1533 av_strlcat(cmd,
1534 /**
1535 * The following entries are required for proper
1536 * streaming from a Realmedia server. They are
1537 * interdependent in some way although we currently
1538 * don't quite understand how. Values were copied
1539 * from mplayer SVN r23589.
1540 * @param CompanyID is a 16-byte ID in base64
1541 * @param ClientChallenge is a 16-byte ID in hex
1542 */
1543 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1544 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1545 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1546 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1547 sizeof(cmd));
b17d11c6 1548 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1cf151e9
RB
1549 if (reply->status_code != RTSP_STATUS_OK) {
1550 err = AVERROR_INVALIDDATA;
1551 goto fail;
1552 }
1553
1554 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1555 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1556 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1557 continue;
7a86bafa
RB
1558 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1559 rt->server_type = RTSP_SERVER_WMS;
c8965800 1560 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1561 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1562 break;
1563 }
1564
3e24c770 1565 if (s->iformat)
6e69f6c4 1566 err = rtsp_setup_input_streams(s, reply);
3e24c770 1567 else
26cb700c 1568 err = rtsp_setup_output_streams(s, host);
e23d195d 1569 if (err)
53620bba 1570 goto fail;
53620bba 1571
8a8754d8 1572 do {
c8965800
RB
1573 int lower_transport = ff_log2_tab[lower_transport_mask &
1574 ~(lower_transport_mask - 1)];
8a8754d8 1575
90abbdba 1576 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1577 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1578 real_challenge : NULL);
8a8754d8 1579 if (err < 0)
7e6ca34f 1580 goto fail;
90abbdba
RB
1581 lower_transport_mask &= ~(1 << lower_transport);
1582 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1583 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1584 goto fail;
1585 }
1586 } while (err);
53620bba 1587
ff762d6e 1588 rt->state = RTSP_STATE_IDLE;
c8965800 1589 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1590 return 0;
1591 fail:
3307e6ea 1592 ff_rtsp_close_streams(s);
1617ad97 1593 url_close(rt->rtsp_hd);
35cfd646 1594 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
d243ba30
LB
1595 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1596 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1597 reply->status_code,
1598 s->filename);
1599 goto redirect;
1600 }
57b5555c 1601 ff_network_close();
1617ad97
FB
1602 return err;
1603}
6f5a3d0a 1604#endif
1617ad97 1605
6f5a3d0a 1606#if CONFIG_RTSP_DEMUXER
4280f9bb
MS
1607static int rtsp_read_header(AVFormatContext *s,
1608 AVFormatParameters *ap)
1609{
1610 RTSPState *rt = s->priv_data;
1611 int ret;
1612
3307e6ea 1613 ret = ff_rtsp_connect(s);
4280f9bb
MS
1614 if (ret)
1615 return ret;
1616
1617 if (ap->initial_pause) {
1618 /* do not start immediately */
1619 } else {
1620 if (rtsp_read_play(s) < 0) {
3307e6ea 1621 ff_rtsp_close_streams(s);
4280f9bb
MS
1622 url_close(rt->rtsp_hd);
1623 return AVERROR_INVALIDDATA;
1624 }
1625 }
1626
1627 return 0;
1628}
1629
0e59034e
RB
1630static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1631 uint8_t *buf, int buf_size)
1632{
1633 RTSPState *rt = s->priv_data;
1634 RTSPStream *rtsp_st;
1635 fd_set rfds;
1636 int fd, fd_max, n, i, ret, tcp_fd;
1637 struct timeval tv;
1638
c8965800 1639 for (;;) {
0e59034e
RB
1640 if (url_interrupt_cb())
1641 return AVERROR(EINTR);
1642 FD_ZERO(&rfds);
1643 if (rt->rtsp_hd) {
1644 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1645 FD_SET(tcp_fd, &rfds);
1646 } else {
1647 fd_max = 0;
1648 tcp_fd = -1;
1649 }
c8965800 1650 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1651 rtsp_st = rt->rtsp_streams[i];
1652 if (rtsp_st->rtp_handle) {
1653 /* currently, we cannot probe RTCP handle because of
1654 * blocking restrictions */
1655 fd = url_get_file_handle(rtsp_st->rtp_handle);
1656 if (fd > fd_max)
1657 fd_max = fd;
1658 FD_SET(fd, &rfds);
1659 }
1660 }
1661 tv.tv_sec = 0;
1662 tv.tv_usec = 100 * 1000;
1663 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1664 if (n > 0) {
c8965800 1665 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1666 rtsp_st = rt->rtsp_streams[i];
1667 if (rtsp_st->rtp_handle) {
1668 fd = url_get_file_handle(rtsp_st->rtp_handle);
1669 if (FD_ISSET(fd, &rfds)) {
1670 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1671 if (ret > 0) {
1672 *prtsp_st = rtsp_st;
1673 return ret;
1674 }
1675 }
1676 }
1677 }
1678#if CONFIG_RTSP_DEMUXER
27000636 1679 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1680 RTSPMessageHeader reply;
1681
3032276b
MS
1682 ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1683 if (ret < 0)
1684 return ret;
0e59034e 1685 /* XXX: parse message */
c02fd3d2 1686 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1687 return 0;
1688 }
1689#endif
1690 }
1691 }
1692}
1693
8b1ab7bf
FB
1694static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1695 uint8_t *buf, int buf_size)
1617ad97
FB
1696{
1697 RTSPState *rt = s->priv_data;
b6892136 1698 int id, len, i, ret;
1617ad97 1699 RTSPStream *rtsp_st;
1617ad97 1700
b6892136 1701#ifdef DEBUG_RTP_TCP
67c9cd69 1702 dprintf(s, "tcp_read_packet:\n");
b6892136 1703#endif
c8965800
RB
1704redo:
1705 for (;;) {
7e726132
RB
1706 RTSPMessageHeader reply;
1707
3307e6ea 1708 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
7e726132 1709 if (ret == -1)
8b1ab7bf 1710 return -1;
7e726132 1711 if (ret == 1) /* received '$' */
1617ad97 1712 break;
7e726132 1713 /* XXX: parse message */
c02fd3d2 1714 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1715 return 0;
1617ad97 1716 }
0e848977 1717 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1718 if (ret != 3)
8b1ab7bf 1719 return -1;
c8965800 1720 id = buf[0];
80fb8234 1721 len = AV_RB16(buf + 1);
b6892136 1722#ifdef DEBUG_RTP_TCP
67c9cd69 1723 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1724#endif
8b1ab7bf 1725 if (len > buf_size || len < 12)
1617ad97
FB
1726 goto redo;
1727 /* get the data */
0e848977 1728 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1729 if (ret != len)
8b1ab7bf 1730 return -1;
985b05d3 1731 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1732 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1733 return -1;
115329f1 1734
1617ad97 1735 /* find the matching stream */
c8965800 1736 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1737 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1738 if (id >= rtsp_st->interleaved_min &&
1739 id <= rtsp_st->interleaved_max)
1617ad97
FB
1740 goto found;
1741 }
1742 goto redo;
c8965800 1743found:
8b1ab7bf
FB
1744 *prtsp_st = rtsp_st;
1745 return len;
1617ad97
FB
1746}
1747
0e59034e
RB
1748static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1749{
1750 RTSPState *rt = s->priv_data;
1751 int ret, len;
1752 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1753 RTSPStream *rtsp_st;
1754
1755 /* get next frames from the same RTP packet */
1756 if (rt->cur_transport_priv) {
c8965800 1757 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1758 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1759 } else
0e59034e
RB
1760 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1761 if (ret == 0) {
1762 rt->cur_transport_priv = NULL;
1763 return 0;
1764 } else if (ret == 1) {
1765 return 0;
c8965800 1766 } else
0e59034e 1767 rt->cur_transport_priv = NULL;
0e59034e
RB
1768 }
1769
1770 /* read next RTP packet */
1771 redo:
1772 switch(rt->lower_transport) {
1773 default:
1774#if CONFIG_RTSP_DEMUXER
1775 case RTSP_LOWER_TRANSPORT_TCP:
1776 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1777 break;
1778#endif
1779 case RTSP_LOWER_TRANSPORT_UDP:
1780 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1781 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1782 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1783 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1784 break;
1785 }
1786 if (len < 0)
1787 return len;
1788 if (len == 0)
1789 return AVERROR_EOF;
c8965800 1790 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1791 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1792 } else
0e59034e
RB
1793 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1794 if (ret < 0)
1795 goto redo;
c8965800 1796 if (ret == 1)
0e59034e
RB
1797 /* more packets may follow, so we save the RTP context */
1798 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1799
1800 return ret;
1801}
1802
c8965800 1803static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1804{
1805 RTSPState *rt = s->priv_data;
98713182 1806 int ret;
30e79845
RB
1807 RTSPMessageHeader reply1, *reply = &reply1;
1808 char cmd[1024];
8b1ab7bf 1809
572c6a38 1810 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1811 int i;
572c6a38 1812 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1813
572c6a38
RB
1814 for (i = 0; i < s->nb_streams; i++)
1815 cache[i] = s->streams[i]->discard;
1816
1817 if (!rt->need_subscription) {
1818 if (memcmp (cache, rt->real_setup_cache,
1819 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1820 snprintf(cmd, sizeof(cmd),
7eaa646f 1821 "Unsubscribe: %s\r\n",
b17d11c6
MS
1822 rt->last_subscription);
1823 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1824 cmd, reply, NULL);
572c6a38
RB
1825 if (reply->status_code != RTSP_STATUS_OK)
1826 return AVERROR_INVALIDDATA;
1827 rt->need_subscription = 1;
1828 }
1256d16b 1829 }
1256d16b 1830
572c6a38
RB
1831 if (rt->need_subscription) {
1832 int r, rule_nr, first = 1;
1833
1834 memcpy(rt->real_setup_cache, cache,
1835 sizeof(enum AVDiscard) * s->nb_streams);
1836 rt->last_subscription[0] = 0;
1837
1838 snprintf(cmd, sizeof(cmd),
b17d11c6 1839 "Subscribe: ");
572c6a38
RB
1840 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1841 rule_nr = 0;
1842 for (r = 0; r < s->nb_streams; r++) {
1843 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1844 if (s->streams[r]->discard != AVDISCARD_ALL) {
1845 if (!first)
1846 av_strlcat(rt->last_subscription, ",",
1847 sizeof(rt->last_subscription));
1848 ff_rdt_subscribe_rule(
1849 rt->last_subscription,
1850 sizeof(rt->last_subscription), i, rule_nr);
1851 first = 0;
1852 }
1853 rule_nr++;
1854 }
1855 }
1856 }
1857 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
b17d11c6
MS
1858 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1859 cmd, reply, NULL);
572c6a38
RB
1860 if (reply->status_code != RTSP_STATUS_OK)
1861 return AVERROR_INVALIDDATA;
1862 rt->need_subscription = 0;
1863
c02fd3d2 1864 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1865 rtsp_read_play (s);
1866 }
1256d16b
RB
1867 }
1868
d7250724 1869 ret = rtsp_fetch_packet(s, pkt);
c8965800 1870 if (ret < 0)
98713182 1871 return ret;
30e79845
RB
1872
1873 /* send dummy request to keep TCP connection alive */
1874 if ((rt->server_type == RTSP_SERVER_WMS ||
1875 rt->server_type == RTSP_SERVER_REAL) &&
1876 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1877 if (rt->server_type == RTSP_SERVER_WMS) {
b17d11c6 1878 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
30e79845 1879 } else {
b17d11c6 1880 ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
30e79845
RB
1881 }
1882 }
1883
8b1ab7bf 1884 return 0;
1617ad97
FB
1885}
1886
ff762d6e
FB
1887/* pause the stream */
1888static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1889{
ff762d6e 1890 RTSPState *rt = s->priv_data;
a9e534d5 1891 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34 1892
b7b8fc34 1893 rt = s->priv_data;
115329f1 1894
c02fd3d2 1895 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1896 return 0;
2e889ae4 1897 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
b17d11c6 1898 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
99b2ac07
RB
1899 if (reply->status_code != RTSP_STATUS_OK) {
1900 return -1;
1901 }
1256d16b 1902 }
5f86057f
RB
1903 rt->state = RTSP_STATE_PAUSED;
1904 return 0;
b7b8fc34
FB
1905}
1906
115329f1 1907static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1908 int64_t timestamp, int flags)
ff762d6e
FB
1909{
1910 RTSPState *rt = s->priv_data;
115329f1 1911
c8965800
RB
1912 rt->seek_timestamp = av_rescale_q(timestamp,
1913 s->streams[stream_index]->time_base,
1914 AV_TIME_BASE_Q);
ff762d6e
FB
1915 switch(rt->state) {
1916 default:
1917 case RTSP_STATE_IDLE:
1918 break;
c02fd3d2 1919 case RTSP_STATE_STREAMING:
ec606b36
LB
1920 if (rtsp_read_pause(s) != 0)
1921 return -1;
1922 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1923 if (rtsp_read_play(s) != 0)
1924 return -1;
1925 break;
1926 case RTSP_STATE_PAUSED:
1927 rt->state = RTSP_STATE_IDLE;
1928 break;
1929 }
1930 return 0;
1931}
1932
1617ad97
FB
1933static int rtsp_read_close(AVFormatContext *s)
1934{
1935 RTSPState *rt = s->priv_data;
1617ad97 1936
b6892136 1937#if 0
1617ad97 1938 /* NOTE: it is valid to flush the buffer here */
90abbdba 1939 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1940 url_fclose(&rt->rtsp_gb);
1941 }
b6892136 1942#endif
b17d11c6 1943 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
1617ad97 1944
3307e6ea 1945 ff_rtsp_close_streams(s);
1617ad97 1946 url_close(rt->rtsp_hd);
57b5555c 1947 ff_network_close();
1617ad97
FB
1948 return 0;
1949}
1950
d2a067d1 1951AVInputFormat rtsp_demuxer = {
1617ad97 1952 "rtsp",
bde15e74 1953 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1954 sizeof(RTSPState),
1955 rtsp_probe,
1956 rtsp_read_header,
1957 rtsp_read_packet,
1958 rtsp_read_close,
ff762d6e 1959 rtsp_read_seek,
bb76a117 1960 .flags = AVFMT_NOFILE,
ff762d6e
FB
1961 .read_play = rtsp_read_play,
1962 .read_pause = rtsp_read_pause,
1617ad97 1963};
96862926 1964#endif
1617ad97 1965
cb1fdc61 1966static int sdp_probe(AVProbeData *p1)
93ced3e8 1967{
0e1ceacd 1968 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1969
1970 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1971 while (p < p_end && *p != '\0') {
c8965800
RB
1972 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1973 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1974 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1975
c8965800 1976 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1977 if (++p >= p_end)
cb1fdc61 1978 break;
cb1fdc61
FB
1979 if (*p == '\r')
1980 p++;
1981 }
93ced3e8
FB
1982 return 0;
1983}
1984
1985#define SDP_MAX_SIZE 8192
1986
c8965800 1987static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1988{
8b1ab7bf 1989 RTSPState *rt = s->priv_data;
93ced3e8
FB
1990 RTSPStream *rtsp_st;
1991 int size, i, err;
1992 char *content;
1993 char url[1024];
1994
57b5555c
MS
1995 if (!ff_network_init())
1996 return AVERROR(EIO);
1997
93ced3e8
FB
1998 /* read the whole sdp file */
1999 /* XXX: better loading */
2000 content = av_malloc(SDP_MAX_SIZE);
899681cd 2001 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
2002 if (size <= 0) {
2003 av_free(content);
2004 return AVERROR_INVALIDDATA;
2005 }
2006 content[size] ='\0';
2007
2008 sdp_parse(s, content);
2009 av_free(content);
2010
2011 /* open each RTP stream */
c8965800 2012 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 2013 rtsp_st = rt->rtsp_streams[i];
115329f1 2014
57b5555c
MS
2015 ff_url_join(url, sizeof(url), "rtp", NULL,
2016 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
2017 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
2018 rtsp_st->sdp_ttl);
dbf30963 2019 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
2020 err = AVERROR_INVALIDDATA;
2021 goto fail;
2022 }
ee0cb67f 2023 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 2024 goto fail;
93ced3e8
FB
2025 }
2026 return 0;
c8965800 2027fail:
3307e6ea 2028 ff_rtsp_close_streams(s);
57b5555c 2029 ff_network_close();
93ced3e8
FB
2030 return err;
2031}
2032
93ced3e8
FB
2033static int sdp_read_close(AVFormatContext *s)
2034{
3307e6ea 2035 ff_rtsp_close_streams(s);
57b5555c 2036 ff_network_close();
93ced3e8
FB
2037 return 0;
2038}
2039
ff70e601 2040AVInputFormat sdp_demuxer = {
93ced3e8 2041 "sdp",
bde15e74 2042 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
2043 sizeof(RTSPState),
2044 sdp_probe,
2045 sdp_read_header,
d7250724 2046 rtsp_fetch_packet,
93ced3e8
FB
2047 sdp_read_close,
2048};