Cosmetics: reindent
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
406792e7 3 * Copyright (c) 2002 Fabrice Bellard
1617ad97 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
1617ad97
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
7246177d
AJ
22/* needed by inet_aton() */
23#define _SVID_SOURCE
24
f9337897 25#include "libavutil/base64.h"
245976da 26#include "libavutil/avstring.h"
6a5d31ac 27#include "libavutil/intreadwrite.h"
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28#include "avformat.h"
29
db0ed93e 30#include <sys/time.h>
b250f9c6 31#if HAVE_SYS_SELECT_H
933bd8e2 32#include <sys/select.h>
6ad1c9c9 33#endif
ea452b54 34#include <strings.h>
42572ef5 35#include "network.h"
c971ff19 36#include "rtsp.h"
1617ad97 37
302879cb 38#include "rtpdec.h"
e9dea59f 39#include "rdt.h"
1a30d541 40#include "rtp_asf.h"
e6327fba 41#include "rtp_vorbis.h"
4934884a 42
1617ad97 43//#define DEBUG
b6892136 44//#define DEBUG_RTP_TCP
1617ad97 45
c482500f 46#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 47int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 48#endif
85fb7b34 49
1ef36a70 50#define SPACE_CHARS " \t\r\n"
da1e126e
RB
51/* we use memchr() instead of strchr() here because strchr() will return
52 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
53#define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
1617ad97
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54static void skip_spaces(const char **pp)
55{
56 const char *p;
57 p = *pp;
58 while (redir_isspace(*p))
59 p++;
60 *pp = p;
61}
62
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RB
63static void get_word_until_chars(char *buf, int buf_size,
64 const char *sep, const char **pp)
1617ad97
FB
65{
66 const char *p;
67 char *q;
68
69 p = *pp;
70 skip_spaces(&p);
71 q = buf;
72 while (!strchr(sep, *p) && *p != '\0') {
73 if ((q - buf) < buf_size - 1)
74 *q++ = *p;
75 p++;
76 }
77 if (buf_size > 0)
78 *q = '\0';
79 *pp = p;
80}
81
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RB
82static void get_word_sep(char *buf, int buf_size, const char *sep,
83 const char **pp)
1617ad97 84{
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RB
85 if (**pp == '/') (*pp)++;
86 get_word_until_chars(buf, buf_size, sep, pp);
87}
1617ad97 88
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89static void get_word(char *buf, int buf_size, const char **pp)
90{
91 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
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92}
93
c8965800 94/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
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95static int sdp_parse_rtpmap(AVFormatContext *s,
96 AVCodecContext *codec, RTSPStream *rtsp_st,
c8965800 97 int payload_type, const char *p)
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98{
99 char buf[256];
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100 int i;
101 AVCodec *c;
7b49ce2e 102 const char *c_name;
93ced3e8 103
d1ccf0e0 104 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
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105 * see if we can handle this kind of payload.
106 * The space should normally not be there but some Real streams or
107 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
108 * have a trailing space. */
109 get_word_sep(buf, sizeof(buf), "/ ", &p);
d1ccf0e0 110 if (payload_type >= RTP_PT_PRIVATE) {
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111 RTPDynamicProtocolHandler *handler;
112 for (handler = RTPFirstDynamicPayloadHandler;
113 handler; handler = handler->next) {
114 if (!strcasecmp(buf, handler->enc_name) &&
115 codec->codec_type == handler->codec_type) {
116 codec->codec_id = handler->codec_id;
117 rtsp_st->dynamic_handler = handler;
118 if (handler->open)
119 rtsp_st->dynamic_protocol_context = handler->open();
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120 break;
121 }
4934884a 122 }
93ced3e8 123 } else {
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124 /* We are in a standard case
125 * (from http://www.iana.org/assignments/rtp-parameters). */
d1ccf0e0 126 /* search into AVRtpPayloadTypes[] */
7ed19d7f 127 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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RD
128 }
129
130 c = avcodec_find_decoder(codec->codec_id);
131 if (c && c->name)
7b49ce2e 132 c_name = c->name;
d1ccf0e0 133 else
170870b7 134 c_name = "(null)";
d1ccf0e0 135
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RB
136 get_word_sep(buf, sizeof(buf), "/", &p);
137 i = atoi(buf);
138 switch (codec->codec_type) {
139 case CODEC_TYPE_AUDIO:
140 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
141 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
142 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
143 if (i > 0) {
144 codec->sample_rate = i;
145 get_word_sep(buf, sizeof(buf), "/", &p);
146 i = atoi(buf);
147 if (i > 0)
148 codec->channels = i;
149 // TODO: there is a bug here; if it is a mono stream, and
150 // less than 22000Hz, faad upconverts to stereo and twice
151 // the frequency. No problem, but the sample rate is being
152 // set here by the sdp line. Patch on its way. (rdm)
d1ccf0e0 153 }
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154 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
155 codec->sample_rate);
156 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
157 codec->channels);
158 break;
159 case CODEC_TYPE_VIDEO:
160 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
161 break;
162 default:
163 break;
164 }
165 return 0;
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166}
167
c8965800 168/* return the length and optionally the data */
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169static int hex_to_data(uint8_t *data, const char *p)
170{
171 int c, len, v;
172
173 len = 0;
174 v = 1;
c8965800 175 for (;;) {
93ced3e8 176 skip_spaces(&p);
6a8c8b36 177 if (*p == '\0')
93ced3e8 178 break;
c8965800 179 c = toupper((unsigned char) *p++);
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180 if (c >= '0' && c <= '9')
181 c = c - '0';
182 else if (c >= 'A' && c <= 'F')
183 c = c - 'A' + 10;
184 else
185 break;
186 v = (v << 4) | c;
187 if (v & 0x100) {
188 if (data)
189 data[len] = v;
190 len++;
191 v = 1;
192 }
193 }
194 return len;
195}
196
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197static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
198 char *attr, char *value)
d1ccf0e0
RD
199{
200 switch (codec->codec_id) {
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201 case CODEC_ID_MPEG4:
202 case CODEC_ID_AAC:
203 if (!strcmp(attr, "config")) {
204 /* decode the hexa encoded parameter */
205 int len = hex_to_data(NULL, value);
206 if (codec->extradata)
207 av_free(codec->extradata);
208 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
209 if (!codec->extradata)
210 return;
211 codec->extradata_size = len;
212 hex_to_data(codec->extradata, value);
213 }
214 break;
215 case CODEC_ID_VORBIS:
216 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
217 break;
218 default:
219 break;
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RD
220 }
221 return;
222}
223
644e7acb 224typedef struct {
7b49ce2e 225 const char *str;
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226 uint16_t type;
227 uint32_t offset;
644e7acb 228} AttrNameMap;
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229
230/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
231#define ATTR_NAME_TYPE_INT 0
232#define ATTR_NAME_TYPE_STR 1
644e7acb 233static const AttrNameMap attr_names[]=
d1ccf0e0 234{
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235 { "SizeLength", ATTR_NAME_TYPE_INT,
236 offsetof(RTPPayloadData, sizelength) },
237 { "IndexLength", ATTR_NAME_TYPE_INT,
238 offsetof(RTPPayloadData, indexlength) },
239 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, indexdeltalength) },
241 { "profile-level-id", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, profile_level_id) },
243 { "StreamType", ATTR_NAME_TYPE_INT,
244 offsetof(RTPPayloadData, streamtype) },
245 { "mode", ATTR_NAME_TYPE_STR,
246 offsetof(RTPPayloadData, mode) },
247 { NULL, -1, -1 },
d1ccf0e0
RD
248};
249
c8965800
RB
250/* parse the attribute line from the fmtp a line of an sdp resonse. This
251 * is broken out as a function because it is used in rtp_h264.c, which is
252 * forthcoming. */
253int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
254 char *value, int value_size)
d0deedcb
RM
255{
256 skip_spaces(p);
c8965800 257 if (**p) {
d0deedcb
RM
258 get_word_sep(attr, attr_size, "=", p);
259 if (**p == '=')
260 (*p)++;
261 get_word_sep(value, value_size, ";", p);
262 if (**p == ';')
263 (*p)++;
264 return 1;
265 }
266 return 0;
267}
268
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RD
269/* parse a SDP line and save stream attributes */
270static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
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271{
272 char attr[256];
373afbaf
RB
273 /* Vorbis setup headers can be up to 12KB and are sent base64
274 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
275 char value[16384];
d1ccf0e0 276 int i;
d1ccf0e0 277 RTSPStream *rtsp_st = st->priv_data;
01f4895c 278 AVCodecContext *codec = st->codec;
be73a544 279 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
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280
281 /* loop on each attribute */
c8965800
RB
282 while (rtsp_next_attr_and_value(&p, attr, sizeof(attr),
283 value, sizeof(value))) {
284 /* grab the codec extra_data from the config parameter of the fmtp
285 * line */
e6327fba
RB
286 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
287 attr, value);
d1ccf0e0
RD
288 /* Looking for a known attribute */
289 for (i = 0; attr_names[i].str; ++i) {
290 if (!strcasecmp(attr, attr_names[i].str)) {
c8965800
RB
291 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
292 *(int *)((char *)rtp_payload_data +
293 attr_names[i].offset) = atoi(value);
294 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
295 *(char **)((char *)rtp_payload_data +
296 attr_names[i].offset) = av_strdup(value);
bb270c08 297 }
93ced3e8 298 }
93ced3e8
FB
299 }
300}
301
debe86bf 302/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
31693e00
RM
303 * and end time.
304 * Used for seeking in the rtp stream.
305 */
306static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
307{
308 char buf[256];
309
310 skip_spaces(&p);
f7d78f36 311 if (!av_stristart(p, "npt=", &p))
31693e00
RM
312 return;
313
314 *start = AV_NOPTS_VALUE;
315 *end = AV_NOPTS_VALUE;
316
317 get_word_sep(buf, sizeof(buf), "-", &p);
318 *start = parse_date(buf, 1);
319 if (*p == '-') {
320 p++;
321 get_word_sep(buf, sizeof(buf), "-", &p);
322 *end = parse_date(buf, 1);
323 }
324// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
325// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
326}
327
93ced3e8
FB
328typedef struct SDPParseState {
329 /* SDP only */
330 struct in_addr default_ip;
c8965800
RB
331 int default_ttl;
332 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
333} SDPParseState;
334
335static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
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336 int letter, const char *buf)
337{
8b1ab7bf 338 RTSPState *rt = s->priv_data;
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339 char buf1[64], st_type[64];
340 const char *p;
fb65d2ca
DP
341 enum CodecType codec_type;
342 int payload_type, i;
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343 AVStream *st;
344 RTSPStream *rtsp_st;
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345 struct in_addr sdp_ip;
346 int ttl;
347
67c9cd69 348 dprintf(s, "sdp: %c='%s'\n", letter, buf);
1617ad97
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349
350 p = buf;
cb760a47
RB
351 if (s1->skip_media && letter != 'm')
352 return;
c8965800 353 switch (letter) {
93ced3e8
FB
354 case 'c':
355 get_word(buf1, sizeof(buf1), &p);
356 if (strcmp(buf1, "IN") != 0)
357 return;
358 get_word(buf1, sizeof(buf1), &p);
359 if (strcmp(buf1, "IP4") != 0)
360 return;
361 get_word_sep(buf1, sizeof(buf1), "/", &p);
362 if (inet_aton(buf1, &sdp_ip) == 0)
363 return;
364 ttl = 16;
365 if (*p == '/') {
366 p++;
367 get_word_sep(buf1, sizeof(buf1), "/", &p);
368 ttl = atoi(buf1);
369 }
370 if (s->nb_streams == 0) {
371 s1->default_ip = sdp_ip;
372 s1->default_ttl = ttl;
373 } else {
374 st = s->streams[s->nb_streams - 1];
375 rtsp_st = st->priv_data;
376 rtsp_st->sdp_ip = sdp_ip;
377 rtsp_st->sdp_ttl = ttl;
378 }
379 break;
1617ad97 380 case 's':
da61e413 381 av_metadata_set(&s->metadata, "title", p);
1617ad97
FB
382 break;
383 case 'i':
384 if (s->nb_streams == 0) {
da61e413 385 av_metadata_set(&s->metadata, "comment", p);
1617ad97
FB
386 break;
387 }
388 break;
389 case 'm':
390 /* new stream */
cb760a47 391 s1->skip_media = 0;
1617ad97
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392 get_word(st_type, sizeof(st_type), &p);
393 if (!strcmp(st_type, "audio")) {
394 codec_type = CODEC_TYPE_AUDIO;
395 } else if (!strcmp(st_type, "video")) {
396 codec_type = CODEC_TYPE_VIDEO;
090438cc
RB
397 } else if (!strcmp(st_type, "application")) {
398 codec_type = CODEC_TYPE_DATA;
1617ad97 399 } else {
cb760a47 400 s1->skip_media = 1;
1617ad97
FB
401 return;
402 }
1617ad97
FB
403 rtsp_st = av_mallocz(sizeof(RTSPStream));
404 if (!rtsp_st)
405 return;
8b1ab7bf
FB
406 rtsp_st->stream_index = -1;
407 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
408
409 rtsp_st->sdp_ip = s1->default_ip;
410 rtsp_st->sdp_ttl = s1->default_ttl;
411
93ced3e8
FB
412 get_word(buf1, sizeof(buf1), &p); /* port */
413 rtsp_st->sdp_port = atoi(buf1);
414
415 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 416
93ced3e8
FB
417 /* XXX: handle list of formats */
418 get_word(buf1, sizeof(buf1), &p); /* format list */
419 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 420
7ed19d7f 421 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
422 /* no corresponding stream */
423 } else {
424 st = av_new_stream(s, 0);
425 if (!st)
426 return;
427 st->priv_data = rtsp_st;
428 rtsp_st->stream_index = st->index;
01f4895c 429 st->codec->codec_type = codec_type;
d1ccf0e0 430 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 431 /* if standard payload type, we can find the codec right now */
bf6d9818 432 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
433 }
434 }
1617ad97 435 /* put a default control url */
00eb13e0 436 av_strlcpy(rtsp_st->control_url, rt->control_uri,
c8965800 437 sizeof(rtsp_st->control_url));
1617ad97
FB
438 break;
439 case 'a':
00eb13e0
AS
440 if (av_strstart(p, "control:", &p)) {
441 if (s->nb_streams == 0) {
442 if (!strncmp(p, "rtsp://", 7))
443 av_strlcpy(rt->control_uri, p,
444 sizeof(rt->control_uri));
445 } else {
1617ad97
FB
446 char proto[32];
447 /* get the control url */
448 st = s->streams[s->nb_streams - 1];
449 rtsp_st = st->priv_data;
115329f1 450
1617ad97 451 /* XXX: may need to add full url resolution */
c8965800
RB
452 url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
453 NULL, NULL, 0, p);
1617ad97
FB
454 if (proto[0] == '\0') {
455 /* relative control URL */
00eb13e0 456 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
c8965800
RB
457 av_strlcat(rtsp_st->control_url, "/",
458 sizeof(rtsp_st->control_url));
459 av_strlcat(rtsp_st->control_url, p,
460 sizeof(rtsp_st->control_url));
461 } else
462 av_strlcpy(rtsp_st->control_url, p,
463 sizeof(rtsp_st->control_url));
00eb13e0 464 }
83d14c85 465 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 466 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 467 get_word(buf1, sizeof(buf1), &p);
93ced3e8 468 payload_type = atoi(buf1);
83d14c85 469 st = s->streams[s->nb_streams - 1];
ff16f551 470 rtsp_st = st->priv_data;
8f3c87f3 471 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
f7d78f36 472 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 473 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 474 get_word(buf1, sizeof(buf1), &p);
93ced3e8 475 payload_type = atoi(buf1);
c8965800
RB
476 for (i = 0; i < s->nb_streams; i++) {
477 st = s->streams[i];
93ced3e8
FB
478 rtsp_st = st->priv_data;
479 if (rtsp_st->sdp_payload_type == payload_type) {
c8965800
RB
480 if (!(rtsp_st->dynamic_handler &&
481 rtsp_st->dynamic_handler->parse_sdp_a_line &&
482 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
483 i, rtsp_st->dynamic_protocol_context, buf)))
ed787542 484 sdp_parse_fmtp(st, p);
93ced3e8
FB
485 }
486 }
c8965800 487 } else if (av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
488 // let dynamic protocol handlers have a stab at the line.
489 get_word(buf1, sizeof(buf1), &p);
490 payload_type = atoi(buf1);
c8965800
RB
491 for (i = 0; i < s->nb_streams; i++) {
492 st = s->streams[i];
d0deedcb 493 rtsp_st = st->priv_data;
c8965800
RB
494 if (rtsp_st->sdp_payload_type == payload_type &&
495 rtsp_st->dynamic_handler &&
496 rtsp_st->dynamic_handler->parse_sdp_a_line)
497 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
498 rtsp_st->dynamic_protocol_context, buf);
d0deedcb 499 }
c8965800 500 } else if (av_strstart(p, "range:", &p)) {
31693e00
RM
501 int64_t start, end;
502
503 // this is so that seeking on a streamed file can work.
504 rtsp_parse_range_npt(p, &start, &end);
c8965800
RB
505 s->start_time = start;
506 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
507 s->duration = (end == AV_NOPTS_VALUE) ?
508 AV_NOPTS_VALUE : end - start;
119b4668
RB
509 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
510 if (atoi(p) == 1)
511 rt->transport = RTSP_TRANSPORT_RDT;
1a30d541
RB
512 } else {
513 if (rt->server_type == RTSP_SERVER_WMS)
514 ff_wms_parse_sdp_a_line(s, p);
515 if (s->nb_streams > 0) {
c4a3d032
RB
516 if (rt->server_type == RTSP_SERVER_REAL)
517 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
518
519 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
520 if (rtsp_st->dynamic_handler &&
521 rtsp_st->dynamic_handler->parse_sdp_a_line)
c8965800
RB
522 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
523 s->nb_streams - 1,
c4a3d032 524 rtsp_st->dynamic_protocol_context, buf);
1a30d541 525 }
1617ad97
FB
526 }
527 break;
528 }
529}
530
5c91a675 531static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
532{
533 const char *p;
534 int letter;
9211bcdd
RB
535 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
536 * contain long SDP lines containing complete ASF Headers (several
537 * kB) or arrays of MDPR (RM stream descriptor) headers plus
538 * "rulebooks" describing their properties. Therefore, the SDP line
373afbaf
RB
539 * buffer is large.
540 *
541 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
542 char buf[16384], *q;
93ced3e8 543 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 544
93ced3e8 545 memset(s1, 0, sizeof(SDPParseState));
1617ad97 546 p = content;
c8965800 547 for (;;) {
1617ad97
FB
548 skip_spaces(&p);
549 letter = *p;
550 if (letter == '\0')
551 break;
552 p++;
553 if (*p != '=')
554 goto next_line;
555 p++;
556 /* get the content */
557 q = buf;
b6892136 558 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
559 if ((q - buf) < sizeof(buf) - 1)
560 *q++ = *p;
561 p++;
562 }
563 *q = '\0';
93ced3e8 564 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
565 next_line:
566 while (*p != '\n' && *p != '\0')
567 p++;
568 if (*p == '\n')
569 p++;
570 }
571 return 0;
572}
573
1ced9da3 574/* close and free RTSP streams */
15ba2315 575void rtsp_close_streams(AVFormatContext *s)
1ced9da3 576{
52aa4338 577 RTSPState *rt = s->priv_data;
1ced9da3
LA
578 int i;
579 RTSPStream *rtsp_st;
580
c8965800 581 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1ced9da3
LA
582 rtsp_st = rt->rtsp_streams[i];
583 if (rtsp_st) {
584 if (rtsp_st->transport_priv) {
fd450a51
MS
585 if (s->oformat) {
586 AVFormatContext *rtpctx = rtsp_st->transport_priv;
587 av_write_trailer(rtpctx);
588 url_fclose(rtpctx->pb);
589 av_free(rtpctx->streams[0]);
590 av_free(rtpctx);
591 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
592 ff_rdt_parse_close(rtsp_st->transport_priv);
593 else
594 rtp_parse_close(rtsp_st->transport_priv);
595 }
596 if (rtsp_st->rtp_handle)
597 url_close(rtsp_st->rtp_handle);
598 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
599 rtsp_st->dynamic_handler->close(
600 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
601 }
602 }
603 av_free(rt->rtsp_streams);
604 if (rt->asf_ctx) {
605 av_close_input_stream (rt->asf_ctx);
606 rt->asf_ctx = NULL;
607 }
608 av_freep(&rt->auth_b64);
609}
610
fd450a51
MS
611static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st, URLContext *handle) {
612 AVFormatContext *rtpctx;
613 int ret;
614 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
615
616 if (!rtp_format)
617 return NULL;
618
619 /* Allocate an AVFormatContext for each output stream */
620 rtpctx = avformat_alloc_context();
621 if (!rtpctx)
622 return NULL;
623
624 rtpctx->oformat = rtp_format;
625 if (!av_new_stream(rtpctx, 0)) {
626 av_free(rtpctx);
627 return NULL;
628 }
629 /* Copy the max delay setting; the rtp muxer reads this. */
630 rtpctx->max_delay = s->max_delay;
631 /* Copy other stream parameters. */
632 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
633
634 /* Remove the local codec, link to the original codec
635 * context instead, to give the rtp muxer access to
636 * codec parameters. */
637 av_free(rtpctx->streams[0]->codec);
638 rtpctx->streams[0]->codec = st->codec;
639
640 url_fdopen(&rtpctx->pb, handle);
641 ret = av_write_header(rtpctx);
642
643 if (ret) {
644 url_fclose(rtpctx->pb);
645 av_free(rtpctx->streams[0]);
646 av_free(rtpctx);
647 return NULL;
648 }
649
650 /* Copy the RTP AVStream timebase back to the original AVStream */
651 st->time_base = rtpctx->streams[0]->time_base;
652 return rtpctx;
653}
654
c8965800 655static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
656{
657 RTSPState *rt = s->priv_data;
658 AVStream *st = NULL;
659
660 /* open the RTP context */
661 if (rtsp_st->stream_index >= 0)
662 st = s->streams[rtsp_st->stream_index];
663 if (!st)
664 s->ctx_flags |= AVFMTCTX_NOHEADER;
665
fd450a51
MS
666 if (s->oformat) {
667 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
668 /* Ownage of rtp_handle is passed to the rtp mux context */
669 rtsp_st->rtp_handle = NULL;
670 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
671 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
672 rtsp_st->dynamic_protocol_context,
673 rtsp_st->dynamic_handler);
674 else
675 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
676 rtsp_st->sdp_payload_type,
677 &rtsp_st->rtp_payload_data);
678
679 if (!rtsp_st->transport_priv) {
680 return AVERROR(ENOMEM);
681 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 682 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
683 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
684 rtsp_st->dynamic_protocol_context,
685 rtsp_st->dynamic_handler);
686 }
687 }
688
689 return 0;
690}
691
103dfbe2 692#if CONFIG_RTSP_DEMUXER
1ced9da3
LA
693static int rtsp_probe(AVProbeData *p)
694{
695 if (av_strstart(p->filename, "rtsp:", NULL))
696 return AVPROBE_SCORE_MAX;
697 return 0;
698}
699
1617ad97
FB
700static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
701{
702 const char *p;
703 int v;
704
705 p = *pp;
706 skip_spaces(&p);
707 v = strtol(p, (char **)&p, 10);
708 if (*p == '-') {
709 p++;
710 *min_ptr = v;
711 v = strtol(p, (char **)&p, 10);
712 *max_ptr = v;
713 } else {
714 *min_ptr = v;
715 *max_ptr = v;
716 }
717 *pp = p;
718}
719
720/* XXX: only one transport specification is parsed */
a9e534d5 721static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
722{
723 char transport_protocol[16];
724 char profile[16];
725 char lower_transport[16];
726 char parameter[16];
727 RTSPTransportField *th;
728 char buf[256];
115329f1 729
1617ad97 730 reply->nb_transports = 0;
115329f1 731
c8965800 732 for (;;) {
1617ad97
FB
733 skip_spaces(&p);
734 if (*p == '\0')
735 break;
736
737 th = &reply->transports[reply->nb_transports];
738
115329f1 739 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 740 "/", &p);
e1502118 741 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
742 get_word_sep(profile, sizeof(profile), "/;,", &p);
743 lower_transport[0] = '\0';
744 /* rtp/avp/<protocol> */
745 if (*p == '/') {
7ecc634e
LB
746 get_word_sep(lower_transport, sizeof(lower_transport),
747 ";,", &p);
119b4668
RB
748 }
749 th->transport = RTSP_TRANSPORT_RTP;
750 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
751 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 752 /* x-pn-tng/<protocol> */
e1502118
LB
753 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
754 profile[0] = '\0';
119b4668 755 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 756 }
b6892136 757 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 758 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 759 else
90abbdba 760 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 761
1617ad97
FB
762 if (*p == ';')
763 p++;
764 /* get each parameter */
765 while (*p != '\0' && *p != ',') {
766 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
767 if (!strcmp(parameter, "port")) {
768 if (*p == '=') {
769 p++;
770 rtsp_parse_range(&th->port_min, &th->port_max, &p);
771 }
772 } else if (!strcmp(parameter, "client_port")) {
773 if (*p == '=') {
774 p++;
115329f1 775 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
776 &th->client_port_max, &p);
777 }
778 } else if (!strcmp(parameter, "server_port")) {
779 if (*p == '=') {
780 p++;
115329f1 781 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
782 &th->server_port_max, &p);
783 }
784 } else if (!strcmp(parameter, "interleaved")) {
785 if (*p == '=') {
786 p++;
115329f1 787 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
788 &th->interleaved_max, &p);
789 }
790 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
791 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
792 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
793 } else if (!strcmp(parameter, "ttl")) {
794 if (*p == '=') {
795 p++;
796 th->ttl = strtol(p, (char **)&p, 10);
797 }
798 } else if (!strcmp(parameter, "destination")) {
799 struct in_addr ipaddr;
800
801 if (*p == '=') {
802 p++;
803 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 804 if (inet_aton(buf, &ipaddr))
1617ad97
FB
805 th->destination = ntohl(ipaddr.s_addr);
806 }
807 }
808 while (*p != ';' && *p != '\0' && *p != ',')
809 p++;
810 if (*p == ';')
811 p++;
812 }
813 if (*p == ',')
814 p++;
815
816 reply->nb_transports++;
817 }
818}
819
a9e534d5 820void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
821{
822 const char *p;
823
824 /* NOTE: we do case independent match for broken servers */
825 p = buf;
f7d78f36 826 if (av_stristart(p, "Session:", &p)) {
30e79845 827 int t;
1617ad97 828 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
829 if (av_stristart(p, ";timeout=", &p) &&
830 (t = strtol(p, NULL, 10)) > 0) {
831 reply->timeout = t;
832 }
f7d78f36 833 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 834 reply->content_length = strtol(p, NULL, 10);
f7d78f36 835 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 836 rtsp_parse_transport(reply, p);
f7d78f36 837 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 838 reply->seq = strtol(p, NULL, 10);
f7d78f36 839 } else if (av_stristart(p, "Range:", &p)) {
31693e00 840 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
841 } else if (av_stristart(p, "RealChallenge1:", &p)) {
842 skip_spaces(&p);
843 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
844 } else if (av_stristart(p, "Server:", &p)) {
845 skip_spaces(&p);
846 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
847 } else if (av_stristart(p, "Notice:", &p) ||
848 av_stristart(p, "X-Notice:", &p)) {
849 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
850 } else if (av_stristart(p, "Location:", &p)) {
851 skip_spaces(&p);
852 av_strlcpy(reply->location, p , sizeof(reply->location));
1617ad97
FB
853 }
854}
855
b7b8fc34
FB
856/* skip a RTP/TCP interleaved packet */
857static void rtsp_skip_packet(AVFormatContext *s)
858{
859 RTSPState *rt = s->priv_data;
860 int ret, len, len1;
861 uint8_t buf[1024];
862
0e848977 863 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
864 if (ret != 3)
865 return;
80fb8234 866 len = AV_RB16(buf + 1);
67c9cd69
BC
867
868 dprintf(s, "skipping RTP packet len=%d\n", len);
869
b7b8fc34
FB
870 /* skip payload */
871 while (len > 0) {
872 len1 = len;
873 if (len1 > sizeof(buf))
874 len1 = sizeof(buf);
0e848977 875 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
876 if (ret != len1)
877 return;
878 len -= len1;
879 }
880}
1617ad97 881
15ba2315 882int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
af037f80
MS
883 unsigned char **content_ptr,
884 int return_on_interleaved_data)
1617ad97
FB
885{
886 RTSPState *rt = s->priv_data;
887 char buf[4096], buf1[1024], *q;
888 unsigned char ch;
889 const char *p;
7e726132 890 int ret, content_length, line_count = 0;
1617ad97
FB
891 unsigned char *content = NULL;
892
d541a7d2 893 memset(reply, 0, sizeof(*reply));
1617ad97 894
1617ad97 895 /* parse reply (XXX: use buffers) */
1617ad97 896 rt->last_reply[0] = '\0';
c8965800 897 for (;;) {
1617ad97 898 q = buf;
c8965800 899 for (;;) {
0e848977 900 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 901#ifdef DEBUG_RTP_TCP
67c9cd69 902 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
903#endif
904 if (ret != 1)
905 return -1;
1617ad97
FB
906 if (ch == '\n')
907 break;
b7b8fc34
FB
908 if (ch == '$') {
909 /* XXX: only parse it if first char on line ? */
7e726132
RB
910 if (return_on_interleaved_data) {
911 return 1;
912 } else
b7b8fc34
FB
913 rtsp_skip_packet(s);
914 } else if (ch != '\r') {
1617ad97
FB
915 if ((q - buf) < sizeof(buf) - 1)
916 *q++ = ch;
917 }
918 }
919 *q = '\0';
67c9cd69
BC
920
921 dprintf(s, "line='%s'\n", buf);
922
1617ad97
FB
923 /* test if last line */
924 if (buf[0] == '\0')
925 break;
926 p = buf;
927 if (line_count == 0) {
928 /* get reply code */
929 get_word(buf1, sizeof(buf1), &p);
930 get_word(buf1, sizeof(buf1), &p);
931 reply->status_code = atoi(buf1);
932 } else {
933 rtsp_parse_line(reply, p);
75e61b0e
MR
934 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
935 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
936 }
937 line_count++;
938 }
115329f1 939
1617ad97 940 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 941 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 942
1617ad97
FB
943 content_length = reply->content_length;
944 if (content_length > 0) {
945 /* leave some room for a trailing '\0' (useful for simple parsing) */
946 content = av_malloc(content_length + 1);
0e848977 947 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
948 content[content_length] = '\0';
949 }
950 if (content_ptr)
951 *content_ptr = content;
e2e2e7dd
AB
952 else
953 av_free(content);
7e726132 954
fccb1770
RB
955 /* EOS */
956 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
957 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 958 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 959 rt->state = RTSP_STATE_IDLE;
c8965800 960 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 961 return AVERROR(EIO); /* data or server error */
c8965800 962 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
963 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
964 return AVERROR(EPERM);
965
7e726132 966 return 0;
1617ad97
FB
967}
968
15ba2315 969void rtsp_send_cmd_with_content_async(AVFormatContext *s,
af037f80
MS
970 const char *cmd,
971 const unsigned char *send_content,
972 int send_content_length)
29b9f58b
RB
973{
974 RTSPState *rt = s->priv_data;
975 char buf[4096], buf1[1024];
976
977 rt->seq++;
978 av_strlcpy(buf, cmd, sizeof(buf));
979 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
980 av_strlcat(buf, buf1, sizeof(buf));
981 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
982 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
983 av_strlcat(buf, buf1, sizeof(buf));
984 }
f9337897
RB
985 if (rt->auth_b64)
986 av_strlcatf(buf, sizeof(buf),
ba93ea6d
RB
987 "Authorization: Basic %s\r\n",
988 rt->auth_b64);
dfd017bf
MS
989 if (send_content_length > 0 && send_content)
990 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 991 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
992
993 dprintf(s, "Sending:\n%s--\n", buf);
994
29b9f58b 995 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
996 if (send_content_length > 0 && send_content)
997 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
998 rt->last_cmd_time = av_gettime();
999}
1000
15ba2315 1001void rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
dfd017bf
MS
1002{
1003 rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
1004}
1005
15ba2315 1006void rtsp_send_cmd(AVFormatContext *s,
af037f80
MS
1007 const char *cmd, RTSPMessageHeader *reply,
1008 unsigned char **content_ptr)
30e79845 1009{
2e13ecfe 1010 rtsp_send_cmd_async(s, cmd);
29b9f58b 1011
7e726132 1012 rtsp_read_reply(s, reply, content_ptr, 0);
29b9f58b
RB
1013}
1014
15ba2315 1015void rtsp_send_cmd_with_content(AVFormatContext *s,
af037f80
MS
1016 const char *cmd,
1017 RTSPMessageHeader *reply,
1018 unsigned char **content_ptr,
1019 const unsigned char *send_content,
1020 int send_content_length)
dfd017bf
MS
1021{
1022 rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
1023
1024 rtsp_read_reply(s, reply, content_ptr, 0);
1025}
1026
53620bba
RB
1027/**
1028 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1029 */
c8965800
RB
1030static int make_setup_request(AVFormatContext *s, const char *host, int port,
1031 int lower_transport, const char *real_challenge)
1617ad97
FB
1032{
1033 RTSPState *rt = s->priv_data;
f830c9a4 1034 int rtx, j, i, err, interleave = 0;
1617ad97 1035 RTSPStream *rtsp_st;
a9e534d5 1036 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1037 char cmd[2048];
e9dea59f
RB
1038 const char *trans_pref;
1039
119b4668 1040 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1041 trans_pref = "x-pn-tng";
1042 else
1043 trans_pref = "RTP/AVP";
115329f1 1044
30e79845
RB
1045 /* default timeout: 1 minute */
1046 rt->timeout = 60;
1047
1617ad97
FB
1048 /* for each stream, make the setup request */
1049 /* XXX: we assume the same server is used for the control of each
c8965800 1050 * RTSP stream */
d1ccf0e0 1051
c8965800 1052 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1053 char transport[2048];
1054
f830c9a4
RB
1055 /**
1056 * WMS serves all UDP data over a single connection, the RTX, which
1057 * isn't necessarily the first in the SDP but has to be the first
1058 * to be set up, else the second/third SETUP will fail with a 461.
1059 */
1060 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1061 rt->server_type == RTSP_SERVER_WMS) {
1062 if (i == 0) {
1063 /* rtx first */
1064 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1065 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1066 if (len >= 4 &&
c8965800
RB
1067 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1068 "/rtx"))
f830c9a4
RB
1069 break;
1070 }
1071 if (rtx == rt->nb_rtsp_streams)
1072 return -1; /* no RTX found */
1073 rtsp_st = rt->rtsp_streams[rtx];
1074 } else
1075 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1076 } else
2fea9650 1077 rtsp_st = rt->rtsp_streams[i];
1617ad97 1078
1617ad97 1079 /* RTP/UDP */
90abbdba 1080 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1081 char buf[256];
85fb7b34 1082
f830c9a4
RB
1083 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1084 port = reply->transports[0].client_port_min;
1085 goto have_port;
1086 }
1087
85fb7b34 1088 /* first try in specified port range */
d1ccf0e0 1089 if (RTSP_RTP_PORT_MIN != 0) {
c8965800
RB
1090 while (j <= RTSP_RTP_PORT_MAX) {
1091 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1092 host, j);
1093 /* we will use two ports per rtp stream (rtp and rtcp) */
1094 j += 2;
1095 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1096 goto rtp_opened;
1097 }
1617ad97 1098 }
85fb7b34 1099
c8965800
RB
1100#if 0
1101 /* then try on any port */
1102 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1103 err = AVERROR_INVALIDDATA;
1104 goto fail;
1105 }
1106#endif
85fb7b34
FB
1107
1108 rtp_opened:
8b1ab7bf 1109 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1110 have_port:
0ad306bc 1111 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1112 "%s/UDP;", trans_pref);
1113 if (rt->server_type != RTSP_SERVER_REAL)
1114 av_strlcat(transport, "unicast;", sizeof(transport));
1115 av_strlcatf(transport, sizeof(transport),
1116 "client_port=%d", port);
f830c9a4
RB
1117 if (rt->transport == RTSP_TRANSPORT_RTP &&
1118 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1119 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1120 }
1121
1122 /* RTP/TCP */
90abbdba 1123 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1124 /** For WMS streams, the application streams are only used for
1125 * UDP. When trying to set it up for TCP streams, the server
1126 * will return an error. Therefore, we skip those streams. */
1127 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1128 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1129 CODEC_TYPE_DATA)
090438cc 1130 continue;
0ad306bc 1131 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1132 "%s/TCP;", trans_pref);
1133 if (rt->server_type == RTSP_SERVER_WMS)
1134 av_strlcat(transport, "unicast;", sizeof(transport));
1135 av_strlcatf(transport, sizeof(transport),
1136 "interleaved=%d-%d",
1137 interleave, interleave + 1);
1138 interleave += 2;
1617ad97
FB
1139 }
1140
90abbdba 1141 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1142 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1143 "%s/UDP;multicast", trans_pref);
1617ad97 1144 }
69adcc4f
MS
1145 if (s->oformat) {
1146 av_strlcat(transport, ";mode=receive", sizeof(transport));
1147 } else if (rt->server_type == RTSP_SERVER_REAL ||
2efc97c2 1148 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1149 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1150 snprintf(cmd, sizeof(cmd),
b6892136
FB
1151 "SETUP %s RTSP/1.0\r\n"
1152 "Transport: %s\r\n",
1617ad97 1153 rtsp_st->control_url, transport);
2e889ae4 1154 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1155 char real_res[41], real_csum[9];
1156 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1157 real_challenge);
1158 av_strlcatf(cmd, sizeof(cmd),
1159 "If-Match: %s\r\n"
1160 "RealChallenge2: %s, sd=%s\r\n",
1161 rt->session_id, real_res, real_csum);
1162 }
1617ad97 1163 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1164 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1165 err = 1;
1166 goto fail;
7e6ca34f
RB
1167 } else if (reply->status_code != RTSP_STATUS_OK ||
1168 reply->nb_transports != 1) {
1617ad97
FB
1169 err = AVERROR_INVALIDDATA;
1170 goto fail;
1171 }
1172
1173 /* XXX: same protocol for all streams is required */
1174 if (i > 0) {
119b4668
RB
1175 if (reply->transports[0].lower_transport != rt->lower_transport ||
1176 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1177 err = AVERROR_INVALIDDATA;
1178 goto fail;
1179 }
1180 } else {
90abbdba 1181 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1182 rt->transport = reply->transports[0].transport;
1617ad97
FB
1183 }
1184
1185 /* close RTP connection if not choosen */
90abbdba
RB
1186 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1187 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1188 url_close(rtsp_st->rtp_handle);
1189 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1190 }
1191
90abbdba
RB
1192 switch(reply->transports[0].lower_transport) {
1193 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1194 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1195 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1196 break;
115329f1 1197
c8965800
RB
1198 case RTSP_LOWER_TRANSPORT_UDP: {
1199 char url[1024];
1200
1201 /* XXX: also use address if specified */
1202 snprintf(url, sizeof(url), "rtp://%s:%d",
1203 host, reply->transports[0].server_port_min);
1204 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1205 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1206 err = AVERROR_INVALIDDATA;
1207 goto fail;
1617ad97 1208 }
9c8fa20d
MS
1209 /* Try to initialize the connection state in a
1210 * potential NAT router by sending dummy packets.
1211 * RTP/RTCP dummy packets are used for RDT, too.
1212 */
30ff7c5c 1213 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1214 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1215 break;
c8965800
RB
1216 }
1217 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1218 char url[1024];
1219 struct in_addr in;
1220 int port, ttl;
1221
1222 if (reply->transports[0].destination) {
1223 in.s_addr = htonl(reply->transports[0].destination);
1224 port = reply->transports[0].port_min;
1225 ttl = reply->transports[0].ttl;
1226 } else {
1227 in = rtsp_st->sdp_ip;
1228 port = rtsp_st->sdp_port;
1229 ttl = rtsp_st->sdp_ttl;
1230 }
1231 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1232 inet_ntoa(in), port, ttl);
1233 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1234 err = AVERROR_INVALIDDATA;
1235 goto fail;
1617ad97
FB
1236 }
1237 break;
1238 }
c8965800 1239 }
d1ccf0e0 1240
ee0cb67f 1241 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1242 goto fail;
1617ad97
FB
1243 }
1244
30e79845
RB
1245 if (reply->timeout > 0)
1246 rt->timeout = reply->timeout;
1247
2e889ae4 1248 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1249 rt->need_subscription = 1;
1250
53620bba
RB
1251 return 0;
1252
1253fail:
c8965800 1254 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1255 if (rt->rtsp_streams[i]->rtp_handle) {
1256 url_close(rt->rtsp_streams[i]->rtp_handle);
1257 rt->rtsp_streams[i]->rtp_handle = NULL;
1258 }
1259 }
53620bba
RB
1260 return err;
1261}
1262
1ced9da3
LA
1263static int rtsp_read_play(AVFormatContext *s)
1264{
1265 RTSPState *rt = s->priv_data;
1266 RTSPMessageHeader reply1, *reply = &reply1;
1267 char cmd[1024];
1268
1269 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1270
1271 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1272 if (rt->state == RTSP_STATE_PAUSED) {
1273 snprintf(cmd, sizeof(cmd),
1274 "PLAY %s RTSP/1.0\r\n",
00eb13e0 1275 rt->control_uri);
1ced9da3
LA
1276 } else {
1277 snprintf(cmd, sizeof(cmd),
1278 "PLAY %s RTSP/1.0\r\n"
1279 "Range: npt=%0.3f-\r\n",
00eb13e0 1280 rt->control_uri,
1ced9da3
LA
1281 (double)rt->seek_timestamp / AV_TIME_BASE);
1282 }
1283 rtsp_send_cmd(s, cmd, reply, NULL);
1284 if (reply->status_code != RTSP_STATUS_OK) {
1285 return -1;
1286 }
1287 }
c02fd3d2 1288 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1289 return 0;
1290}
1291
e23d195d
MS
1292static int rtsp_setup_input_streams(AVFormatContext *s)
1293{
1294 RTSPState *rt = s->priv_data;
1295 RTSPMessageHeader reply1, *reply = &reply1;
1296 char cmd[1024];
1297 unsigned char *content = NULL;
1298 int ret;
1299
1300 /* describe the stream */
1301 snprintf(cmd, sizeof(cmd),
1302 "DESCRIBE %s RTSP/1.0\r\n"
1303 "Accept: application/sdp\r\n",
1304 s->filename);
1305 if (rt->server_type == RTSP_SERVER_REAL) {
1306 /**
1307 * The Require: attribute is needed for proper streaming from
1308 * Realmedia servers.
1309 */
1310 av_strlcat(cmd,
1311 "Require: com.real.retain-entity-for-setup\r\n",
1312 sizeof(cmd));
1313 }
1314 rtsp_send_cmd(s, cmd, reply, &content);
1315 if (!content)
1316 return AVERROR_INVALIDDATA;
1317 if (reply->status_code != RTSP_STATUS_OK) {
1318 av_freep(&content);
1319 return AVERROR_INVALIDDATA;
1320 }
1321
1322 /* now we got the SDP description, we parse it */
1323 ret = sdp_parse(s, (const char *)content);
1324 av_freep(&content);
1325 if (ret < 0)
1326 return AVERROR_INVALIDDATA;
1327
1328 return 0;
1329}
1330
3e24c770
MS
1331static int rtsp_setup_output_streams(AVFormatContext *s)
1332{
1333 RTSPState *rt = s->priv_data;
1334 RTSPMessageHeader reply1, *reply = &reply1;
1335 char cmd[1024];
1336 int i;
1337 char *sdp;
1338
1339 /* Announce the stream */
1340 snprintf(cmd, sizeof(cmd),
1341 "ANNOUNCE %s RTSP/1.0\r\n"
1342 "Content-Type: application/sdp\r\n",
1343 s->filename);
1344 sdp = av_mallocz(8192);
1345 if (sdp == NULL)
1346 return AVERROR(ENOMEM);
1347 if (avf_sdp_create(&s, 1, sdp, 8192)) {
1348 av_free(sdp);
1349 return AVERROR_INVALIDDATA;
1350 }
1351 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
1352 rtsp_send_cmd_with_content(s, cmd, reply, NULL, sdp, strlen(sdp));
1353 av_free(sdp);
1354 if (reply->status_code != RTSP_STATUS_OK)
1355 return AVERROR_INVALIDDATA;
1356
1357 /* Set up the RTSPStreams for each AVStream */
1358 for (i = 0; i < s->nb_streams; i++) {
1359 RTSPStream *rtsp_st;
1360 AVStream *st = s->streams[i];
1361
1362 rtsp_st = av_mallocz(sizeof(RTSPStream));
1363 if (!rtsp_st)
1364 return AVERROR(ENOMEM);
1365 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1366
1367 st->priv_data = rtsp_st;
1368 rtsp_st->stream_index = i;
1369
1370 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1371 /* Note, this must match the relative uri set in the sdp content */
1372 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1373 "/streamid=%d", i);
1374 }
1375
1376 return 0;
1377}
1378
15ba2315 1379int rtsp_connect(AVFormatContext *s)
53620bba
RB
1380{
1381 RTSPState *rt = s->priv_data;
921da217
LB
1382 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1383 char *option_list, *option, *filename;
53620bba 1384 URLContext *rtsp_hd;
e23d195d 1385 int port, err;
a9e534d5 1386 RTSPMessageHeader reply1, *reply = &reply1;
90abbdba 1387 int lower_transport_mask = 0;
1cf151e9 1388 char real_challenge[64];
c8965800 1389redirect:
53620bba 1390 /* extract hostname and port */
f9337897 1391 url_split(NULL, 0, auth, sizeof(auth),
53620bba 1392 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897
RB
1393 if (*auth) {
1394 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1395
1396 if (!(rt->auth_b64 = av_malloc(b64_len)))
1397 return AVERROR(ENOMEM);
1398 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1399 err = AVERROR(EINVAL);
1400 goto fail;
1401 }
1402 }
53620bba
RB
1403 if (port < 0)
1404 port = RTSP_DEFAULT_PORT;
1405
1406 /* search for options */
1407 option_list = strchr(path, '?');
1408 if (option_list) {
921da217 1409 filename = strchr(s->filename, '?');
c8965800 1410 while (option_list) {
53620bba 1411 /* move the option pointer */
921da217 1412 option = ++option_list;
53620bba
RB
1413 option_list = strchr(option_list, '&');
1414 if (option_list)
921da217
LB
1415 *option_list = 0;
1416
53620bba 1417 /* handle the options */
c8965800 1418 if (!strcmp(option, "udp")) {
90abbdba 1419 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1420 } else if (!strcmp(option, "multicast")) {
90abbdba 1421 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1422 } else if (!strcmp(option, "tcp")) {
90abbdba 1423 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1424 } else {
921da217
LB
1425 strcpy(++filename, option);
1426 filename += strlen(option);
1427 if (option_list) *filename = '&';
1428 }
53620bba 1429 }
921da217 1430 *filename = 0;
53620bba
RB
1431 }
1432
90abbdba 1433 if (!lower_transport_mask)
2a1d51c5 1434 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba 1435
3e24c770
MS
1436 if (s->oformat) {
1437 /* Only UDP output is supported at the moment. */
1438 lower_transport_mask &= 1 << RTSP_LOWER_TRANSPORT_UDP;
1439 if (!lower_transport_mask) {
1440 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1441 "only UDP is supported for output.\n");
1442 err = AVERROR(EINVAL);
1443 goto fail;
1444 }
1445 }
1446
53620bba
RB
1447 /* open the tcp connexion */
1448 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
f9337897
RB
1449 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1450 err = AVERROR(EIO);
1451 goto fail;
1452 }
53620bba
RB
1453 rt->rtsp_hd = rtsp_hd;
1454 rt->seq = 0;
1455
c8965800
RB
1456 /* request options supported by the server; this also detects server
1457 * type */
00eb13e0
AS
1458 av_strlcpy(rt->control_uri, s->filename,
1459 sizeof(rt->control_uri));
1cf151e9
RB
1460 for (rt->server_type = RTSP_SERVER_RTP;;) {
1461 snprintf(cmd, sizeof(cmd),
1462 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1463 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1464 av_strlcat(cmd,
1465 /**
1466 * The following entries are required for proper
1467 * streaming from a Realmedia server. They are
1468 * interdependent in some way although we currently
1469 * don't quite understand how. Values were copied
1470 * from mplayer SVN r23589.
1471 * @param CompanyID is a 16-byte ID in base64
1472 * @param ClientChallenge is a 16-byte ID in hex
1473 */
1474 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1475 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1476 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1477 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1478 sizeof(cmd));
1479 rtsp_send_cmd(s, cmd, reply, NULL);
1480 if (reply->status_code != RTSP_STATUS_OK) {
1481 err = AVERROR_INVALIDDATA;
1482 goto fail;
1483 }
1484
1485 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1486 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1487 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1488 continue;
7a86bafa
RB
1489 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1490 rt->server_type = RTSP_SERVER_WMS;
c8965800 1491 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1492 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1493 break;
1494 }
1495
3e24c770 1496 if (s->iformat)
2efc97c2 1497 err = rtsp_setup_input_streams(s);
3e24c770
MS
1498 else
1499 err = rtsp_setup_output_streams(s);
e23d195d 1500 if (err)
53620bba 1501 goto fail;
53620bba 1502
8a8754d8 1503 do {
c8965800
RB
1504 int lower_transport = ff_log2_tab[lower_transport_mask &
1505 ~(lower_transport_mask - 1)];
8a8754d8 1506
90abbdba 1507 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1508 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1509 real_challenge : NULL);
8a8754d8 1510 if (err < 0)
7e6ca34f 1511 goto fail;
90abbdba
RB
1512 lower_transport_mask &= ~(1 << lower_transport);
1513 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1514 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1515 goto fail;
1516 }
1517 } while (err);
53620bba 1518
ff762d6e 1519 rt->state = RTSP_STATE_IDLE;
c8965800 1520 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1521 return 0;
1522 fail:
52aa4338 1523 rtsp_close_streams(s);
1617ad97 1524 url_close(rt->rtsp_hd);
35cfd646 1525 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
d243ba30
LB
1526 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1527 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1528 reply->status_code,
1529 s->filename);
1530 goto redirect;
1531 }
1617ad97
FB
1532 return err;
1533}
1534
4280f9bb
MS
1535static int rtsp_read_header(AVFormatContext *s,
1536 AVFormatParameters *ap)
1537{
1538 RTSPState *rt = s->priv_data;
1539 int ret;
1540
1541 ret = rtsp_connect(s);
1542 if (ret)
1543 return ret;
1544
1545 if (ap->initial_pause) {
1546 /* do not start immediately */
1547 } else {
1548 if (rtsp_read_play(s) < 0) {
1549 rtsp_close_streams(s);
1550 url_close(rt->rtsp_hd);
1551 return AVERROR_INVALIDDATA;
1552 }
1553 }
1554
1555 return 0;
1556}
1557
0e59034e
RB
1558static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1559 uint8_t *buf, int buf_size)
1560{
1561 RTSPState *rt = s->priv_data;
1562 RTSPStream *rtsp_st;
1563 fd_set rfds;
1564 int fd, fd_max, n, i, ret, tcp_fd;
1565 struct timeval tv;
1566
c8965800 1567 for (;;) {
0e59034e
RB
1568 if (url_interrupt_cb())
1569 return AVERROR(EINTR);
1570 FD_ZERO(&rfds);
1571 if (rt->rtsp_hd) {
1572 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1573 FD_SET(tcp_fd, &rfds);
1574 } else {
1575 fd_max = 0;
1576 tcp_fd = -1;
1577 }
c8965800 1578 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1579 rtsp_st = rt->rtsp_streams[i];
1580 if (rtsp_st->rtp_handle) {
1581 /* currently, we cannot probe RTCP handle because of
1582 * blocking restrictions */
1583 fd = url_get_file_handle(rtsp_st->rtp_handle);
1584 if (fd > fd_max)
1585 fd_max = fd;
1586 FD_SET(fd, &rfds);
1587 }
1588 }
1589 tv.tv_sec = 0;
1590 tv.tv_usec = 100 * 1000;
1591 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1592 if (n > 0) {
c8965800 1593 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1594 rtsp_st = rt->rtsp_streams[i];
1595 if (rtsp_st->rtp_handle) {
1596 fd = url_get_file_handle(rtsp_st->rtp_handle);
1597 if (FD_ISSET(fd, &rfds)) {
1598 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1599 if (ret > 0) {
1600 *prtsp_st = rtsp_st;
1601 return ret;
1602 }
1603 }
1604 }
1605 }
1606#if CONFIG_RTSP_DEMUXER
27000636 1607 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1608 RTSPMessageHeader reply;
1609
1610 rtsp_read_reply(s, &reply, NULL, 0);
1611 /* XXX: parse message */
c02fd3d2 1612 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1613 return 0;
1614 }
1615#endif
1616 }
1617 }
1618}
1619
8b1ab7bf
FB
1620static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1621 uint8_t *buf, int buf_size)
1617ad97
FB
1622{
1623 RTSPState *rt = s->priv_data;
b6892136 1624 int id, len, i, ret;
1617ad97 1625 RTSPStream *rtsp_st;
1617ad97 1626
b6892136 1627#ifdef DEBUG_RTP_TCP
67c9cd69 1628 dprintf(s, "tcp_read_packet:\n");
b6892136 1629#endif
c8965800
RB
1630redo:
1631 for (;;) {
7e726132
RB
1632 RTSPMessageHeader reply;
1633
1634 ret = rtsp_read_reply(s, &reply, NULL, 1);
1635 if (ret == -1)
8b1ab7bf 1636 return -1;
7e726132 1637 if (ret == 1) /* received '$' */
1617ad97 1638 break;
7e726132 1639 /* XXX: parse message */
c02fd3d2 1640 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1641 return 0;
1617ad97 1642 }
0e848977 1643 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1644 if (ret != 3)
8b1ab7bf 1645 return -1;
c8965800 1646 id = buf[0];
80fb8234 1647 len = AV_RB16(buf + 1);
b6892136 1648#ifdef DEBUG_RTP_TCP
67c9cd69 1649 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1650#endif
8b1ab7bf 1651 if (len > buf_size || len < 12)
1617ad97
FB
1652 goto redo;
1653 /* get the data */
0e848977 1654 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1655 if (ret != len)
8b1ab7bf 1656 return -1;
985b05d3 1657 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1658 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1659 return -1;
115329f1 1660
1617ad97 1661 /* find the matching stream */
c8965800 1662 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1663 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1664 if (id >= rtsp_st->interleaved_min &&
1665 id <= rtsp_st->interleaved_max)
1617ad97
FB
1666 goto found;
1667 }
1668 goto redo;
c8965800 1669found:
8b1ab7bf
FB
1670 *prtsp_st = rtsp_st;
1671 return len;
1617ad97
FB
1672}
1673
0e59034e
RB
1674static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1675{
1676 RTSPState *rt = s->priv_data;
1677 int ret, len;
1678 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1679 RTSPStream *rtsp_st;
1680
1681 /* get next frames from the same RTP packet */
1682 if (rt->cur_transport_priv) {
c8965800 1683 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1684 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1685 } else
0e59034e
RB
1686 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1687 if (ret == 0) {
1688 rt->cur_transport_priv = NULL;
1689 return 0;
1690 } else if (ret == 1) {
1691 return 0;
c8965800 1692 } else
0e59034e 1693 rt->cur_transport_priv = NULL;
0e59034e
RB
1694 }
1695
1696 /* read next RTP packet */
1697 redo:
1698 switch(rt->lower_transport) {
1699 default:
1700#if CONFIG_RTSP_DEMUXER
1701 case RTSP_LOWER_TRANSPORT_TCP:
1702 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1703 break;
1704#endif
1705 case RTSP_LOWER_TRANSPORT_UDP:
1706 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1707 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1708 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1709 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1710 break;
1711 }
1712 if (len < 0)
1713 return len;
1714 if (len == 0)
1715 return AVERROR_EOF;
c8965800 1716 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1717 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1718 } else
0e59034e
RB
1719 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1720 if (ret < 0)
1721 goto redo;
c8965800 1722 if (ret == 1)
0e59034e
RB
1723 /* more packets may follow, so we save the RTP context */
1724 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1725
1726 return ret;
1727}
1728
c8965800 1729static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1730{
1731 RTSPState *rt = s->priv_data;
98713182 1732 int ret;
30e79845
RB
1733 RTSPMessageHeader reply1, *reply = &reply1;
1734 char cmd[1024];
8b1ab7bf 1735
572c6a38 1736 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1737 int i;
572c6a38 1738 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1739
572c6a38
RB
1740 for (i = 0; i < s->nb_streams; i++)
1741 cache[i] = s->streams[i]->discard;
1742
1743 if (!rt->need_subscription) {
1744 if (memcmp (cache, rt->real_setup_cache,
1745 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1746 snprintf(cmd, sizeof(cmd),
7eaa646f
RB
1747 "SET_PARAMETER %s RTSP/1.0\r\n"
1748 "Unsubscribe: %s\r\n",
00eb13e0 1749 rt->control_uri, rt->last_subscription);
572c6a38
RB
1750 rtsp_send_cmd(s, cmd, reply, NULL);
1751 if (reply->status_code != RTSP_STATUS_OK)
1752 return AVERROR_INVALIDDATA;
1753 rt->need_subscription = 1;
1754 }
1256d16b 1755 }
1256d16b 1756
572c6a38
RB
1757 if (rt->need_subscription) {
1758 int r, rule_nr, first = 1;
1759
1760 memcpy(rt->real_setup_cache, cache,
1761 sizeof(enum AVDiscard) * s->nb_streams);
1762 rt->last_subscription[0] = 0;
1763
1764 snprintf(cmd, sizeof(cmd),
1765 "SET_PARAMETER %s RTSP/1.0\r\n"
1766 "Subscribe: ",
00eb13e0 1767 rt->control_uri);
572c6a38
RB
1768 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1769 rule_nr = 0;
1770 for (r = 0; r < s->nb_streams; r++) {
1771 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1772 if (s->streams[r]->discard != AVDISCARD_ALL) {
1773 if (!first)
1774 av_strlcat(rt->last_subscription, ",",
1775 sizeof(rt->last_subscription));
1776 ff_rdt_subscribe_rule(
1777 rt->last_subscription,
1778 sizeof(rt->last_subscription), i, rule_nr);
1779 first = 0;
1780 }
1781 rule_nr++;
1782 }
1783 }
1784 }
1785 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1786 rtsp_send_cmd(s, cmd, reply, NULL);
1787 if (reply->status_code != RTSP_STATUS_OK)
1788 return AVERROR_INVALIDDATA;
1789 rt->need_subscription = 0;
1790
c02fd3d2 1791 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1792 rtsp_read_play (s);
1793 }
1256d16b
RB
1794 }
1795
d7250724 1796 ret = rtsp_fetch_packet(s, pkt);
c8965800 1797 if (ret < 0)
98713182 1798 return ret;
30e79845
RB
1799
1800 /* send dummy request to keep TCP connection alive */
1801 if ((rt->server_type == RTSP_SERVER_WMS ||
1802 rt->server_type == RTSP_SERVER_REAL) &&
1803 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1804 if (rt->server_type == RTSP_SERVER_WMS) {
1805 snprintf(cmd, sizeof(cmd) - 1,
1806 "GET_PARAMETER %s RTSP/1.0\r\n",
00eb13e0 1807 rt->control_uri);
2e13ecfe 1808 rtsp_send_cmd_async(s, cmd);
30e79845 1809 } else {
2e13ecfe 1810 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
30e79845
RB
1811 }
1812 }
1813
8b1ab7bf 1814 return 0;
1617ad97
FB
1815}
1816
ff762d6e
FB
1817/* pause the stream */
1818static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1819{
ff762d6e 1820 RTSPState *rt = s->priv_data;
a9e534d5 1821 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1822 char cmd[1024];
1823
b7b8fc34 1824 rt = s->priv_data;
115329f1 1825
c02fd3d2 1826 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1827 return 0;
2e889ae4 1828 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1829 snprintf(cmd, sizeof(cmd),
1830 "PAUSE %s RTSP/1.0\r\n",
00eb13e0 1831 rt->control_uri);
99b2ac07
RB
1832 rtsp_send_cmd(s, cmd, reply, NULL);
1833 if (reply->status_code != RTSP_STATUS_OK) {
1834 return -1;
1835 }
1256d16b 1836 }
5f86057f
RB
1837 rt->state = RTSP_STATE_PAUSED;
1838 return 0;
b7b8fc34
FB
1839}
1840
115329f1 1841static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1842 int64_t timestamp, int flags)
ff762d6e
FB
1843{
1844 RTSPState *rt = s->priv_data;
115329f1 1845
c8965800
RB
1846 rt->seek_timestamp = av_rescale_q(timestamp,
1847 s->streams[stream_index]->time_base,
1848 AV_TIME_BASE_Q);
ff762d6e
FB
1849 switch(rt->state) {
1850 default:
1851 case RTSP_STATE_IDLE:
1852 break;
c02fd3d2 1853 case RTSP_STATE_STREAMING:
ec606b36
LB
1854 if (rtsp_read_pause(s) != 0)
1855 return -1;
1856 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1857 if (rtsp_read_play(s) != 0)
1858 return -1;
1859 break;
1860 case RTSP_STATE_PAUSED:
1861 rt->state = RTSP_STATE_IDLE;
1862 break;
1863 }
1864 return 0;
1865}
1866
1617ad97
FB
1867static int rtsp_read_close(AVFormatContext *s)
1868{
1869 RTSPState *rt = s->priv_data;
1617ad97
FB
1870 char cmd[1024];
1871
b6892136 1872#if 0
1617ad97 1873 /* NOTE: it is valid to flush the buffer here */
90abbdba 1874 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1875 url_fclose(&rt->rtsp_gb);
1876 }
b6892136 1877#endif
115329f1 1878 snprintf(cmd, sizeof(cmd),
b6892136 1879 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97 1880 s->filename);
2e13ecfe 1881 rtsp_send_cmd_async(s, cmd);
1617ad97 1882
52aa4338 1883 rtsp_close_streams(s);
1617ad97
FB
1884 url_close(rt->rtsp_hd);
1885 return 0;
1886}
1887
d2a067d1 1888AVInputFormat rtsp_demuxer = {
1617ad97 1889 "rtsp",
bde15e74 1890 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1891 sizeof(RTSPState),
1892 rtsp_probe,
1893 rtsp_read_header,
1894 rtsp_read_packet,
1895 rtsp_read_close,
ff762d6e 1896 rtsp_read_seek,
bb76a117 1897 .flags = AVFMT_NOFILE,
ff762d6e
FB
1898 .read_play = rtsp_read_play,
1899 .read_pause = rtsp_read_pause,
1617ad97 1900};
96862926 1901#endif
1617ad97 1902
cb1fdc61 1903static int sdp_probe(AVProbeData *p1)
93ced3e8 1904{
0e1ceacd 1905 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1906
1907 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1908 while (p < p_end && *p != '\0') {
c8965800
RB
1909 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1910 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1911 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1912
c8965800 1913 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1914 if (++p >= p_end)
cb1fdc61 1915 break;
cb1fdc61
FB
1916 if (*p == '\r')
1917 p++;
1918 }
93ced3e8
FB
1919 return 0;
1920}
1921
1922#define SDP_MAX_SIZE 8192
1923
c8965800 1924static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1925{
8b1ab7bf 1926 RTSPState *rt = s->priv_data;
93ced3e8
FB
1927 RTSPStream *rtsp_st;
1928 int size, i, err;
1929 char *content;
1930 char url[1024];
1931
1932 /* read the whole sdp file */
1933 /* XXX: better loading */
1934 content = av_malloc(SDP_MAX_SIZE);
899681cd 1935 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1936 if (size <= 0) {
1937 av_free(content);
1938 return AVERROR_INVALIDDATA;
1939 }
1940 content[size] ='\0';
1941
1942 sdp_parse(s, content);
1943 av_free(content);
1944
1945 /* open each RTP stream */
c8965800 1946 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1947 rtsp_st = rt->rtsp_streams[i];
115329f1 1948
d2bf42be 1949 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1950 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1951 rtsp_st->sdp_port,
d2bf42be 1952 rtsp_st->sdp_port,
93ced3e8 1953 rtsp_st->sdp_ttl);
dbf30963 1954 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1955 err = AVERROR_INVALIDDATA;
1956 goto fail;
1957 }
ee0cb67f 1958 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1959 goto fail;
93ced3e8
FB
1960 }
1961 return 0;
c8965800 1962fail:
52aa4338 1963 rtsp_close_streams(s);
93ced3e8
FB
1964 return err;
1965}
1966
93ced3e8
FB
1967static int sdp_read_close(AVFormatContext *s)
1968{
52aa4338 1969 rtsp_close_streams(s);
93ced3e8
FB
1970 return 0;
1971}
1972
ff70e601 1973AVInputFormat sdp_demuxer = {
93ced3e8 1974 "sdp",
bde15e74 1975 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1976 sizeof(RTSPState),
1977 sdp_probe,
1978 sdp_read_header,
d7250724 1979 rtsp_fetch_packet,
93ced3e8
FB
1980 sdp_read_close,
1981};