Cosmetics: Fix a comment.
[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
f9337897 22#include "libavutil/base64.h"
245976da 23#include "libavutil/avstring.h"
6a5d31ac 24#include "libavutil/intreadwrite.h"
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25#include "avformat.h"
26
db0ed93e 27#include <sys/time.h>
b250f9c6 28#if HAVE_SYS_SELECT_H
933bd8e2 29#include <sys/select.h>
6ad1c9c9 30#endif
ea452b54 31#include <strings.h>
42572ef5 32#include "network.h"
cbfa66d0 33#include "os_support.h"
c971ff19 34#include "rtsp.h"
1617ad97 35
302879cb 36#include "rtpdec.h"
e9dea59f 37#include "rdt.h"
f65919af
MS
38#include "rtpdec_asf.h"
39#include "rtpdec_vorbis.h"
4934884a 40
1617ad97 41//#define DEBUG
b6892136 42//#define DEBUG_RTP_TCP
1617ad97 43
c482500f 44#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 45int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 46#endif
85fb7b34 47
1ef36a70 48#define SPACE_CHARS " \t\r\n"
da1e126e
RB
49/* we use memchr() instead of strchr() here because strchr() will return
50 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
51#define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
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52static void skip_spaces(const char **pp)
53{
54 const char *p;
55 p = *pp;
56 while (redir_isspace(*p))
57 p++;
58 *pp = p;
59}
60
1ef36a70
RB
61static void get_word_until_chars(char *buf, int buf_size,
62 const char *sep, const char **pp)
1617ad97
FB
63{
64 const char *p;
65 char *q;
66
67 p = *pp;
68 skip_spaces(&p);
69 q = buf;
70 while (!strchr(sep, *p) && *p != '\0') {
71 if ((q - buf) < buf_size - 1)
72 *q++ = *p;
73 p++;
74 }
75 if (buf_size > 0)
76 *q = '\0';
77 *pp = p;
78}
79
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80static void get_word_sep(char *buf, int buf_size, const char *sep,
81 const char **pp)
1617ad97 82{
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83 if (**pp == '/') (*pp)++;
84 get_word_until_chars(buf, buf_size, sep, pp);
85}
1617ad97 86
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87static void get_word(char *buf, int buf_size, const char **pp)
88{
89 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
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90}
91
c8965800 92/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
8f3c87f3
RB
93static int sdp_parse_rtpmap(AVFormatContext *s,
94 AVCodecContext *codec, RTSPStream *rtsp_st,
c8965800 95 int payload_type, const char *p)
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96{
97 char buf[256];
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98 int i;
99 AVCodec *c;
7b49ce2e 100 const char *c_name;
93ced3e8 101
d1ccf0e0 102 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
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RB
103 * see if we can handle this kind of payload.
104 * The space should normally not be there but some Real streams or
105 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
106 * have a trailing space. */
107 get_word_sep(buf, sizeof(buf), "/ ", &p);
d1ccf0e0 108 if (payload_type >= RTP_PT_PRIVATE) {
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109 RTPDynamicProtocolHandler *handler;
110 for (handler = RTPFirstDynamicPayloadHandler;
111 handler; handler = handler->next) {
112 if (!strcasecmp(buf, handler->enc_name) &&
113 codec->codec_type == handler->codec_type) {
114 codec->codec_id = handler->codec_id;
115 rtsp_st->dynamic_handler = handler;
116 if (handler->open)
117 rtsp_st->dynamic_protocol_context = handler->open();
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118 break;
119 }
4934884a 120 }
93ced3e8 121 } else {
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122 /* We are in a standard case
123 * (from http://www.iana.org/assignments/rtp-parameters). */
d1ccf0e0 124 /* search into AVRtpPayloadTypes[] */
7ed19d7f 125 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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RD
126 }
127
128 c = avcodec_find_decoder(codec->codec_id);
129 if (c && c->name)
7b49ce2e 130 c_name = c->name;
d1ccf0e0 131 else
170870b7 132 c_name = "(null)";
d1ccf0e0 133
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RB
134 get_word_sep(buf, sizeof(buf), "/", &p);
135 i = atoi(buf);
136 switch (codec->codec_type) {
137 case CODEC_TYPE_AUDIO:
138 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
139 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
140 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
141 if (i > 0) {
142 codec->sample_rate = i;
143 get_word_sep(buf, sizeof(buf), "/", &p);
144 i = atoi(buf);
145 if (i > 0)
146 codec->channels = i;
147 // TODO: there is a bug here; if it is a mono stream, and
148 // less than 22000Hz, faad upconverts to stereo and twice
149 // the frequency. No problem, but the sample rate is being
150 // set here by the sdp line. Patch on its way. (rdm)
d1ccf0e0 151 }
7515ed0c
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152 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
153 codec->sample_rate);
154 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
155 codec->channels);
156 break;
157 case CODEC_TYPE_VIDEO:
158 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
159 break;
160 default:
161 break;
162 }
163 return 0;
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164}
165
c8965800 166/* return the length and optionally the data */
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167static int hex_to_data(uint8_t *data, const char *p)
168{
169 int c, len, v;
170
171 len = 0;
172 v = 1;
c8965800 173 for (;;) {
93ced3e8 174 skip_spaces(&p);
6a8c8b36 175 if (*p == '\0')
93ced3e8 176 break;
c8965800 177 c = toupper((unsigned char) *p++);
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178 if (c >= '0' && c <= '9')
179 c = c - '0';
180 else if (c >= 'A' && c <= 'F')
181 c = c - 'A' + 10;
182 else
183 break;
184 v = (v << 4) | c;
185 if (v & 0x100) {
186 if (data)
187 data[len] = v;
188 len++;
189 v = 1;
190 }
191 }
192 return len;
193}
194
e6327fba
RB
195static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
196 char *attr, char *value)
d1ccf0e0
RD
197{
198 switch (codec->codec_id) {
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199 case CODEC_ID_MPEG4:
200 case CODEC_ID_AAC:
201 if (!strcmp(attr, "config")) {
202 /* decode the hexa encoded parameter */
203 int len = hex_to_data(NULL, value);
204 if (codec->extradata)
205 av_free(codec->extradata);
206 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
207 if (!codec->extradata)
208 return;
209 codec->extradata_size = len;
210 hex_to_data(codec->extradata, value);
211 }
212 break;
213 case CODEC_ID_VORBIS:
214 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
215 break;
216 default:
217 break;
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RD
218 }
219 return;
220}
221
644e7acb 222typedef struct {
7b49ce2e 223 const char *str;
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224 uint16_t type;
225 uint32_t offset;
644e7acb 226} AttrNameMap;
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227
228/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
229#define ATTR_NAME_TYPE_INT 0
230#define ATTR_NAME_TYPE_STR 1
644e7acb 231static const AttrNameMap attr_names[]=
d1ccf0e0 232{
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233 { "SizeLength", ATTR_NAME_TYPE_INT,
234 offsetof(RTPPayloadData, sizelength) },
235 { "IndexLength", ATTR_NAME_TYPE_INT,
236 offsetof(RTPPayloadData, indexlength) },
237 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
238 offsetof(RTPPayloadData, indexdeltalength) },
239 { "profile-level-id", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, profile_level_id) },
241 { "StreamType", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, streamtype) },
243 { "mode", ATTR_NAME_TYPE_STR,
244 offsetof(RTPPayloadData, mode) },
245 { NULL, -1, -1 },
d1ccf0e0
RD
246};
247
c8965800
RB
248/* parse the attribute line from the fmtp a line of an sdp resonse. This
249 * is broken out as a function because it is used in rtp_h264.c, which is
250 * forthcoming. */
3307e6ea 251int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
93993933 252 char *value, int value_size)
d0deedcb
RM
253{
254 skip_spaces(p);
c8965800 255 if (**p) {
d0deedcb
RM
256 get_word_sep(attr, attr_size, "=", p);
257 if (**p == '=')
258 (*p)++;
259 get_word_sep(value, value_size, ";", p);
260 if (**p == ';')
261 (*p)++;
262 return 1;
263 }
264 return 0;
265}
266
d1ccf0e0
RD
267/* parse a SDP line and save stream attributes */
268static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
269{
270 char attr[256];
373afbaf
RB
271 /* Vorbis setup headers can be up to 12KB and are sent base64
272 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
273 char value[16384];
d1ccf0e0 274 int i;
d1ccf0e0 275 RTSPStream *rtsp_st = st->priv_data;
01f4895c 276 AVCodecContext *codec = st->codec;
be73a544 277 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
278
279 /* loop on each attribute */
3307e6ea 280 while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
93993933 281 value, sizeof(value))) {
c8965800
RB
282 /* grab the codec extra_data from the config parameter of the fmtp
283 * line */
e6327fba
RB
284 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
285 attr, value);
d1ccf0e0
RD
286 /* Looking for a known attribute */
287 for (i = 0; attr_names[i].str; ++i) {
288 if (!strcasecmp(attr, attr_names[i].str)) {
c8965800
RB
289 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
290 *(int *)((char *)rtp_payload_data +
291 attr_names[i].offset) = atoi(value);
292 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
293 *(char **)((char *)rtp_payload_data +
294 attr_names[i].offset) = av_strdup(value);
bb270c08 295 }
93ced3e8 296 }
93ced3e8
FB
297 }
298}
299
debe86bf 300/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
31693e00
RM
301 * and end time.
302 * Used for seeking in the rtp stream.
303 */
304static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
305{
306 char buf[256];
307
308 skip_spaces(&p);
f7d78f36 309 if (!av_stristart(p, "npt=", &p))
31693e00
RM
310 return;
311
312 *start = AV_NOPTS_VALUE;
313 *end = AV_NOPTS_VALUE;
314
315 get_word_sep(buf, sizeof(buf), "-", &p);
316 *start = parse_date(buf, 1);
317 if (*p == '-') {
318 p++;
319 get_word_sep(buf, sizeof(buf), "-", &p);
320 *end = parse_date(buf, 1);
321 }
322// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
323// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
324}
325
93ced3e8
FB
326typedef struct SDPParseState {
327 /* SDP only */
328 struct in_addr default_ip;
c8965800
RB
329 int default_ttl;
330 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
331} SDPParseState;
332
333static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
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334 int letter, const char *buf)
335{
8b1ab7bf 336 RTSPState *rt = s->priv_data;
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337 char buf1[64], st_type[64];
338 const char *p;
fb65d2ca
DP
339 enum CodecType codec_type;
340 int payload_type, i;
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341 AVStream *st;
342 RTSPStream *rtsp_st;
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343 struct in_addr sdp_ip;
344 int ttl;
345
67c9cd69 346 dprintf(s, "sdp: %c='%s'\n", letter, buf);
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347
348 p = buf;
cb760a47
RB
349 if (s1->skip_media && letter != 'm')
350 return;
c8965800 351 switch (letter) {
93ced3e8
FB
352 case 'c':
353 get_word(buf1, sizeof(buf1), &p);
354 if (strcmp(buf1, "IN") != 0)
355 return;
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IP4") != 0)
358 return;
359 get_word_sep(buf1, sizeof(buf1), "/", &p);
ac11d562 360 if (ff_inet_aton(buf1, &sdp_ip) == 0)
93ced3e8
FB
361 return;
362 ttl = 16;
363 if (*p == '/') {
364 p++;
365 get_word_sep(buf1, sizeof(buf1), "/", &p);
366 ttl = atoi(buf1);
367 }
368 if (s->nb_streams == 0) {
369 s1->default_ip = sdp_ip;
370 s1->default_ttl = ttl;
371 } else {
372 st = s->streams[s->nb_streams - 1];
373 rtsp_st = st->priv_data;
374 rtsp_st->sdp_ip = sdp_ip;
375 rtsp_st->sdp_ttl = ttl;
376 }
377 break;
1617ad97 378 case 's':
da61e413 379 av_metadata_set(&s->metadata, "title", p);
1617ad97
FB
380 break;
381 case 'i':
382 if (s->nb_streams == 0) {
da61e413 383 av_metadata_set(&s->metadata, "comment", p);
1617ad97
FB
384 break;
385 }
386 break;
387 case 'm':
388 /* new stream */
cb760a47 389 s1->skip_media = 0;
1617ad97
FB
390 get_word(st_type, sizeof(st_type), &p);
391 if (!strcmp(st_type, "audio")) {
392 codec_type = CODEC_TYPE_AUDIO;
393 } else if (!strcmp(st_type, "video")) {
394 codec_type = CODEC_TYPE_VIDEO;
090438cc
RB
395 } else if (!strcmp(st_type, "application")) {
396 codec_type = CODEC_TYPE_DATA;
1617ad97 397 } else {
cb760a47 398 s1->skip_media = 1;
1617ad97
FB
399 return;
400 }
1617ad97
FB
401 rtsp_st = av_mallocz(sizeof(RTSPStream));
402 if (!rtsp_st)
403 return;
8b1ab7bf
FB
404 rtsp_st->stream_index = -1;
405 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
406
407 rtsp_st->sdp_ip = s1->default_ip;
408 rtsp_st->sdp_ttl = s1->default_ttl;
409
93ced3e8
FB
410 get_word(buf1, sizeof(buf1), &p); /* port */
411 rtsp_st->sdp_port = atoi(buf1);
412
413 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 414
93ced3e8
FB
415 /* XXX: handle list of formats */
416 get_word(buf1, sizeof(buf1), &p); /* format list */
417 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 418
7ed19d7f 419 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
420 /* no corresponding stream */
421 } else {
422 st = av_new_stream(s, 0);
423 if (!st)
424 return;
425 st->priv_data = rtsp_st;
426 rtsp_st->stream_index = st->index;
01f4895c 427 st->codec->codec_type = codec_type;
d1ccf0e0 428 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 429 /* if standard payload type, we can find the codec right now */
bf6d9818 430 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
431 }
432 }
1617ad97 433 /* put a default control url */
00eb13e0 434 av_strlcpy(rtsp_st->control_url, rt->control_uri,
c8965800 435 sizeof(rtsp_st->control_url));
1617ad97
FB
436 break;
437 case 'a':
00eb13e0
AS
438 if (av_strstart(p, "control:", &p)) {
439 if (s->nb_streams == 0) {
440 if (!strncmp(p, "rtsp://", 7))
441 av_strlcpy(rt->control_uri, p,
442 sizeof(rt->control_uri));
443 } else {
1617ad97
FB
444 char proto[32];
445 /* get the control url */
446 st = s->streams[s->nb_streams - 1];
447 rtsp_st = st->priv_data;
115329f1 448
1617ad97 449 /* XXX: may need to add full url resolution */
c5c6e67c 450 ff_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
f984dcf6 451 NULL, NULL, 0, p);
1617ad97
FB
452 if (proto[0] == '\0') {
453 /* relative control URL */
00eb13e0 454 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
c8965800
RB
455 av_strlcat(rtsp_st->control_url, "/",
456 sizeof(rtsp_st->control_url));
457 av_strlcat(rtsp_st->control_url, p,
458 sizeof(rtsp_st->control_url));
459 } else
460 av_strlcpy(rtsp_st->control_url, p,
461 sizeof(rtsp_st->control_url));
00eb13e0 462 }
83d14c85 463 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 464 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 465 get_word(buf1, sizeof(buf1), &p);
93ced3e8 466 payload_type = atoi(buf1);
83d14c85 467 st = s->streams[s->nb_streams - 1];
ff16f551 468 rtsp_st = st->priv_data;
8f3c87f3 469 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
f7d78f36 470 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 471 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 472 get_word(buf1, sizeof(buf1), &p);
93ced3e8 473 payload_type = atoi(buf1);
c8965800
RB
474 for (i = 0; i < s->nb_streams; i++) {
475 st = s->streams[i];
93ced3e8
FB
476 rtsp_st = st->priv_data;
477 if (rtsp_st->sdp_payload_type == payload_type) {
c8965800
RB
478 if (!(rtsp_st->dynamic_handler &&
479 rtsp_st->dynamic_handler->parse_sdp_a_line &&
480 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
481 i, rtsp_st->dynamic_protocol_context, buf)))
ed787542 482 sdp_parse_fmtp(st, p);
93ced3e8
FB
483 }
484 }
c8965800 485 } else if (av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
486 // let dynamic protocol handlers have a stab at the line.
487 get_word(buf1, sizeof(buf1), &p);
488 payload_type = atoi(buf1);
c8965800
RB
489 for (i = 0; i < s->nb_streams; i++) {
490 st = s->streams[i];
d0deedcb 491 rtsp_st = st->priv_data;
c8965800
RB
492 if (rtsp_st->sdp_payload_type == payload_type &&
493 rtsp_st->dynamic_handler &&
494 rtsp_st->dynamic_handler->parse_sdp_a_line)
495 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
496 rtsp_st->dynamic_protocol_context, buf);
d0deedcb 497 }
c8965800 498 } else if (av_strstart(p, "range:", &p)) {
31693e00
RM
499 int64_t start, end;
500
501 // this is so that seeking on a streamed file can work.
502 rtsp_parse_range_npt(p, &start, &end);
c8965800
RB
503 s->start_time = start;
504 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
505 s->duration = (end == AV_NOPTS_VALUE) ?
506 AV_NOPTS_VALUE : end - start;
119b4668
RB
507 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
508 if (atoi(p) == 1)
509 rt->transport = RTSP_TRANSPORT_RDT;
1a30d541
RB
510 } else {
511 if (rt->server_type == RTSP_SERVER_WMS)
512 ff_wms_parse_sdp_a_line(s, p);
513 if (s->nb_streams > 0) {
c4a3d032
RB
514 if (rt->server_type == RTSP_SERVER_REAL)
515 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
516
517 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
518 if (rtsp_st->dynamic_handler &&
519 rtsp_st->dynamic_handler->parse_sdp_a_line)
c8965800
RB
520 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
521 s->nb_streams - 1,
c4a3d032 522 rtsp_st->dynamic_protocol_context, buf);
1a30d541 523 }
1617ad97
FB
524 }
525 break;
526 }
527}
528
5c91a675 529static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
530{
531 const char *p;
532 int letter;
9211bcdd
RB
533 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
534 * contain long SDP lines containing complete ASF Headers (several
535 * kB) or arrays of MDPR (RM stream descriptor) headers plus
536 * "rulebooks" describing their properties. Therefore, the SDP line
373afbaf
RB
537 * buffer is large.
538 *
539 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
540 char buf[16384], *q;
93ced3e8 541 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 542
93ced3e8 543 memset(s1, 0, sizeof(SDPParseState));
1617ad97 544 p = content;
c8965800 545 for (;;) {
1617ad97
FB
546 skip_spaces(&p);
547 letter = *p;
548 if (letter == '\0')
549 break;
550 p++;
551 if (*p != '=')
552 goto next_line;
553 p++;
554 /* get the content */
555 q = buf;
b6892136 556 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
557 if ((q - buf) < sizeof(buf) - 1)
558 *q++ = *p;
559 p++;
560 }
561 *q = '\0';
93ced3e8 562 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
563 next_line:
564 while (*p != '\n' && *p != '\0')
565 p++;
566 if (*p == '\n')
567 p++;
568 }
569 return 0;
570}
571
1ced9da3 572/* close and free RTSP streams */
3307e6ea 573void ff_rtsp_close_streams(AVFormatContext *s)
1ced9da3 574{
52aa4338 575 RTSPState *rt = s->priv_data;
1ced9da3
LA
576 int i;
577 RTSPStream *rtsp_st;
578
c8965800 579 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1ced9da3
LA
580 rtsp_st = rt->rtsp_streams[i];
581 if (rtsp_st) {
582 if (rtsp_st->transport_priv) {
fd450a51
MS
583 if (s->oformat) {
584 AVFormatContext *rtpctx = rtsp_st->transport_priv;
585 av_write_trailer(rtpctx);
586 url_fclose(rtpctx->pb);
f86f6656
MS
587 av_metadata_free(&rtpctx->streams[0]->metadata);
588 av_metadata_free(&rtpctx->metadata);
fd450a51
MS
589 av_free(rtpctx->streams[0]);
590 av_free(rtpctx);
591 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
592 ff_rdt_parse_close(rtsp_st->transport_priv);
593 else
594 rtp_parse_close(rtsp_st->transport_priv);
595 }
596 if (rtsp_st->rtp_handle)
597 url_close(rtsp_st->rtp_handle);
598 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
599 rtsp_st->dynamic_handler->close(
600 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
601 }
602 }
603 av_free(rt->rtsp_streams);
604 if (rt->asf_ctx) {
605 av_close_input_stream (rt->asf_ctx);
606 rt->asf_ctx = NULL;
607 }
608 av_freep(&rt->auth_b64);
609}
610
5c7fd910
MS
611static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
612 URLContext *handle)
613{
fd450a51
MS
614 AVFormatContext *rtpctx;
615 int ret;
616 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
617
618 if (!rtp_format)
619 return NULL;
620
621 /* Allocate an AVFormatContext for each output stream */
622 rtpctx = avformat_alloc_context();
623 if (!rtpctx)
624 return NULL;
625
626 rtpctx->oformat = rtp_format;
627 if (!av_new_stream(rtpctx, 0)) {
628 av_free(rtpctx);
629 return NULL;
630 }
631 /* Copy the max delay setting; the rtp muxer reads this. */
632 rtpctx->max_delay = s->max_delay;
633 /* Copy other stream parameters. */
634 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
635
636 /* Remove the local codec, link to the original codec
637 * context instead, to give the rtp muxer access to
638 * codec parameters. */
639 av_free(rtpctx->streams[0]->codec);
640 rtpctx->streams[0]->codec = st->codec;
641
642 url_fdopen(&rtpctx->pb, handle);
643 ret = av_write_header(rtpctx);
644
645 if (ret) {
646 url_fclose(rtpctx->pb);
647 av_free(rtpctx->streams[0]);
648 av_free(rtpctx);
649 return NULL;
650 }
651
652 /* Copy the RTP AVStream timebase back to the original AVStream */
653 st->time_base = rtpctx->streams[0]->time_base;
654 return rtpctx;
655}
656
c8965800 657static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
658{
659 RTSPState *rt = s->priv_data;
660 AVStream *st = NULL;
661
662 /* open the RTP context */
663 if (rtsp_st->stream_index >= 0)
664 st = s->streams[rtsp_st->stream_index];
665 if (!st)
666 s->ctx_flags |= AVFMTCTX_NOHEADER;
667
fd450a51
MS
668 if (s->oformat) {
669 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
670 /* Ownage of rtp_handle is passed to the rtp mux context */
671 rtsp_st->rtp_handle = NULL;
672 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
673 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
674 rtsp_st->dynamic_protocol_context,
675 rtsp_st->dynamic_handler);
676 else
677 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
678 rtsp_st->sdp_payload_type,
679 &rtsp_st->rtp_payload_data);
680
681 if (!rtsp_st->transport_priv) {
682 return AVERROR(ENOMEM);
683 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 684 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
685 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
686 rtsp_st->dynamic_protocol_context,
687 rtsp_st->dynamic_handler);
688 }
689 }
690
691 return 0;
692}
693
6f5a3d0a 694#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
1ced9da3
LA
695static int rtsp_probe(AVProbeData *p)
696{
697 if (av_strstart(p->filename, "rtsp:", NULL))
698 return AVPROBE_SCORE_MAX;
699 return 0;
700}
701
1617ad97
FB
702static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
703{
704 const char *p;
705 int v;
706
707 p = *pp;
708 skip_spaces(&p);
709 v = strtol(p, (char **)&p, 10);
710 if (*p == '-') {
711 p++;
712 *min_ptr = v;
713 v = strtol(p, (char **)&p, 10);
714 *max_ptr = v;
715 } else {
716 *min_ptr = v;
717 *max_ptr = v;
718 }
719 *pp = p;
720}
721
722/* XXX: only one transport specification is parsed */
a9e534d5 723static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
724{
725 char transport_protocol[16];
726 char profile[16];
727 char lower_transport[16];
728 char parameter[16];
729 RTSPTransportField *th;
730 char buf[256];
115329f1 731
1617ad97 732 reply->nb_transports = 0;
115329f1 733
c8965800 734 for (;;) {
1617ad97
FB
735 skip_spaces(&p);
736 if (*p == '\0')
737 break;
738
739 th = &reply->transports[reply->nb_transports];
740
115329f1 741 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 742 "/", &p);
e1502118 743 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
744 get_word_sep(profile, sizeof(profile), "/;,", &p);
745 lower_transport[0] = '\0';
746 /* rtp/avp/<protocol> */
747 if (*p == '/') {
7ecc634e
LB
748 get_word_sep(lower_transport, sizeof(lower_transport),
749 ";,", &p);
119b4668
RB
750 }
751 th->transport = RTSP_TRANSPORT_RTP;
752 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
753 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 754 /* x-pn-tng/<protocol> */
e1502118
LB
755 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
756 profile[0] = '\0';
119b4668 757 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 758 }
b6892136 759 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 760 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 761 else
90abbdba 762 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 763
1617ad97
FB
764 if (*p == ';')
765 p++;
766 /* get each parameter */
767 while (*p != '\0' && *p != ',') {
768 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
769 if (!strcmp(parameter, "port")) {
770 if (*p == '=') {
771 p++;
772 rtsp_parse_range(&th->port_min, &th->port_max, &p);
773 }
774 } else if (!strcmp(parameter, "client_port")) {
775 if (*p == '=') {
776 p++;
115329f1 777 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
778 &th->client_port_max, &p);
779 }
780 } else if (!strcmp(parameter, "server_port")) {
781 if (*p == '=') {
782 p++;
115329f1 783 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
784 &th->server_port_max, &p);
785 }
786 } else if (!strcmp(parameter, "interleaved")) {
787 if (*p == '=') {
788 p++;
115329f1 789 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
790 &th->interleaved_max, &p);
791 }
792 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
793 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
794 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
795 } else if (!strcmp(parameter, "ttl")) {
796 if (*p == '=') {
797 p++;
798 th->ttl = strtol(p, (char **)&p, 10);
799 }
800 } else if (!strcmp(parameter, "destination")) {
801 struct in_addr ipaddr;
802
803 if (*p == '=') {
804 p++;
805 get_word_sep(buf, sizeof(buf), ";,", &p);
ac11d562 806 if (ff_inet_aton(buf, &ipaddr))
1617ad97
FB
807 th->destination = ntohl(ipaddr.s_addr);
808 }
809 }
810 while (*p != ';' && *p != '\0' && *p != ',')
811 p++;
812 if (*p == ';')
813 p++;
814 }
815 if (*p == ',')
816 p++;
817
818 reply->nb_transports++;
819 }
820}
821
3307e6ea 822void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
1617ad97
FB
823{
824 const char *p;
825
826 /* NOTE: we do case independent match for broken servers */
827 p = buf;
f7d78f36 828 if (av_stristart(p, "Session:", &p)) {
30e79845 829 int t;
1617ad97 830 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
831 if (av_stristart(p, ";timeout=", &p) &&
832 (t = strtol(p, NULL, 10)) > 0) {
833 reply->timeout = t;
834 }
f7d78f36 835 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 836 reply->content_length = strtol(p, NULL, 10);
f7d78f36 837 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 838 rtsp_parse_transport(reply, p);
f7d78f36 839 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 840 reply->seq = strtol(p, NULL, 10);
f7d78f36 841 } else if (av_stristart(p, "Range:", &p)) {
31693e00 842 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
843 } else if (av_stristart(p, "RealChallenge1:", &p)) {
844 skip_spaces(&p);
845 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
846 } else if (av_stristart(p, "Server:", &p)) {
847 skip_spaces(&p);
848 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
849 } else if (av_stristart(p, "Notice:", &p) ||
850 av_stristart(p, "X-Notice:", &p)) {
851 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
852 } else if (av_stristart(p, "Location:", &p)) {
853 skip_spaces(&p);
854 av_strlcpy(reply->location, p , sizeof(reply->location));
1617ad97
FB
855 }
856}
857
b7b8fc34
FB
858/* skip a RTP/TCP interleaved packet */
859static void rtsp_skip_packet(AVFormatContext *s)
860{
861 RTSPState *rt = s->priv_data;
862 int ret, len, len1;
863 uint8_t buf[1024];
864
0e848977 865 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
866 if (ret != 3)
867 return;
80fb8234 868 len = AV_RB16(buf + 1);
67c9cd69
BC
869
870 dprintf(s, "skipping RTP packet len=%d\n", len);
871
b7b8fc34
FB
872 /* skip payload */
873 while (len > 0) {
874 len1 = len;
875 if (len1 > sizeof(buf))
876 len1 = sizeof(buf);
0e848977 877 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
878 if (ret != len1)
879 return;
880 len -= len1;
881 }
882}
1617ad97 883
3307e6ea 884int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
93993933
MS
885 unsigned char **content_ptr,
886 int return_on_interleaved_data)
1617ad97
FB
887{
888 RTSPState *rt = s->priv_data;
889 char buf[4096], buf1[1024], *q;
890 unsigned char ch;
891 const char *p;
7e726132 892 int ret, content_length, line_count = 0;
1617ad97
FB
893 unsigned char *content = NULL;
894
d541a7d2 895 memset(reply, 0, sizeof(*reply));
1617ad97 896
1617ad97 897 /* parse reply (XXX: use buffers) */
1617ad97 898 rt->last_reply[0] = '\0';
c8965800 899 for (;;) {
1617ad97 900 q = buf;
c8965800 901 for (;;) {
0e848977 902 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 903#ifdef DEBUG_RTP_TCP
67c9cd69 904 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
905#endif
906 if (ret != 1)
907 return -1;
1617ad97
FB
908 if (ch == '\n')
909 break;
b7b8fc34
FB
910 if (ch == '$') {
911 /* XXX: only parse it if first char on line ? */
7e726132
RB
912 if (return_on_interleaved_data) {
913 return 1;
914 } else
b7b8fc34
FB
915 rtsp_skip_packet(s);
916 } else if (ch != '\r') {
1617ad97
FB
917 if ((q - buf) < sizeof(buf) - 1)
918 *q++ = ch;
919 }
920 }
921 *q = '\0';
67c9cd69
BC
922
923 dprintf(s, "line='%s'\n", buf);
924
1617ad97
FB
925 /* test if last line */
926 if (buf[0] == '\0')
927 break;
928 p = buf;
929 if (line_count == 0) {
930 /* get reply code */
931 get_word(buf1, sizeof(buf1), &p);
932 get_word(buf1, sizeof(buf1), &p);
933 reply->status_code = atoi(buf1);
934 } else {
3307e6ea 935 ff_rtsp_parse_line(reply, p);
75e61b0e
MR
936 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
937 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
938 }
939 line_count++;
940 }
115329f1 941
1617ad97 942 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 943 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 944
1617ad97
FB
945 content_length = reply->content_length;
946 if (content_length > 0) {
947 /* leave some room for a trailing '\0' (useful for simple parsing) */
948 content = av_malloc(content_length + 1);
0e848977 949 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
950 content[content_length] = '\0';
951 }
952 if (content_ptr)
953 *content_ptr = content;
e2e2e7dd
AB
954 else
955 av_free(content);
7e726132 956
fccb1770
RB
957 /* EOS */
958 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
959 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 960 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 961 rt->state = RTSP_STATE_IDLE;
c8965800 962 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 963 return AVERROR(EIO); /* data or server error */
c8965800 964 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
965 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
966 return AVERROR(EPERM);
967
7e726132 968 return 0;
1617ad97
FB
969}
970
3307e6ea 971void ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
93993933
MS
972 const char *cmd,
973 const unsigned char *send_content,
974 int send_content_length)
29b9f58b
RB
975{
976 RTSPState *rt = s->priv_data;
977 char buf[4096], buf1[1024];
978
979 rt->seq++;
980 av_strlcpy(buf, cmd, sizeof(buf));
981 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
982 av_strlcat(buf, buf1, sizeof(buf));
983 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
984 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
985 av_strlcat(buf, buf1, sizeof(buf));
986 }
f9337897
RB
987 if (rt->auth_b64)
988 av_strlcatf(buf, sizeof(buf),
ba93ea6d
RB
989 "Authorization: Basic %s\r\n",
990 rt->auth_b64);
dfd017bf
MS
991 if (send_content_length > 0 && send_content)
992 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 993 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
994
995 dprintf(s, "Sending:\n%s--\n", buf);
996
29b9f58b 997 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
998 if (send_content_length > 0 && send_content)
999 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
1000 rt->last_cmd_time = av_gettime();
1001}
1002
3307e6ea 1003void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *cmd)
dfd017bf 1004{
3307e6ea 1005 ff_rtsp_send_cmd_with_content_async(s, cmd, NULL, 0);
dfd017bf
MS
1006}
1007
3307e6ea 1008void ff_rtsp_send_cmd(AVFormatContext *s,
93993933
MS
1009 const char *cmd, RTSPMessageHeader *reply,
1010 unsigned char **content_ptr)
30e79845 1011{
3307e6ea 1012 ff_rtsp_send_cmd_async(s, cmd);
29b9f58b 1013
3307e6ea 1014 ff_rtsp_read_reply(s, reply, content_ptr, 0);
29b9f58b
RB
1015}
1016
3307e6ea 1017void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
af037f80
MS
1018 const char *cmd,
1019 RTSPMessageHeader *reply,
1020 unsigned char **content_ptr,
1021 const unsigned char *send_content,
1022 int send_content_length)
dfd017bf 1023{
3307e6ea 1024 ff_rtsp_send_cmd_with_content_async(s, cmd, send_content, send_content_length);
dfd017bf 1025
3307e6ea 1026 ff_rtsp_read_reply(s, reply, content_ptr, 0);
dfd017bf
MS
1027}
1028
53620bba
RB
1029/**
1030 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1031 */
c8965800
RB
1032static int make_setup_request(AVFormatContext *s, const char *host, int port,
1033 int lower_transport, const char *real_challenge)
1617ad97
FB
1034{
1035 RTSPState *rt = s->priv_data;
f830c9a4 1036 int rtx, j, i, err, interleave = 0;
1617ad97 1037 RTSPStream *rtsp_st;
a9e534d5 1038 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1039 char cmd[2048];
e9dea59f
RB
1040 const char *trans_pref;
1041
119b4668 1042 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1043 trans_pref = "x-pn-tng";
1044 else
1045 trans_pref = "RTP/AVP";
115329f1 1046
30e79845
RB
1047 /* default timeout: 1 minute */
1048 rt->timeout = 60;
1049
1617ad97
FB
1050 /* for each stream, make the setup request */
1051 /* XXX: we assume the same server is used for the control of each
c8965800 1052 * RTSP stream */
d1ccf0e0 1053
c8965800 1054 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1055 char transport[2048];
1056
f830c9a4
RB
1057 /**
1058 * WMS serves all UDP data over a single connection, the RTX, which
1059 * isn't necessarily the first in the SDP but has to be the first
1060 * to be set up, else the second/third SETUP will fail with a 461.
1061 */
1062 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1063 rt->server_type == RTSP_SERVER_WMS) {
1064 if (i == 0) {
1065 /* rtx first */
1066 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1067 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1068 if (len >= 4 &&
c8965800
RB
1069 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1070 "/rtx"))
f830c9a4
RB
1071 break;
1072 }
1073 if (rtx == rt->nb_rtsp_streams)
1074 return -1; /* no RTX found */
1075 rtsp_st = rt->rtsp_streams[rtx];
1076 } else
1077 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1078 } else
2fea9650 1079 rtsp_st = rt->rtsp_streams[i];
1617ad97 1080
1617ad97 1081 /* RTP/UDP */
90abbdba 1082 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1083 char buf[256];
85fb7b34 1084
f830c9a4
RB
1085 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1086 port = reply->transports[0].client_port_min;
1087 goto have_port;
1088 }
1089
85fb7b34 1090 /* first try in specified port range */
d1ccf0e0 1091 if (RTSP_RTP_PORT_MIN != 0) {
c8965800 1092 while (j <= RTSP_RTP_PORT_MAX) {
57b5555c
MS
1093 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1094 "?localport=%d", j);
c8965800
RB
1095 /* we will use two ports per rtp stream (rtp and rtcp) */
1096 j += 2;
1097 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1098 goto rtp_opened;
1099 }
1617ad97 1100 }
85fb7b34 1101
c8965800
RB
1102#if 0
1103 /* then try on any port */
1104 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1105 err = AVERROR_INVALIDDATA;
1106 goto fail;
1107 }
1108#endif
85fb7b34
FB
1109
1110 rtp_opened:
8b1ab7bf 1111 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1112 have_port:
0ad306bc 1113 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1114 "%s/UDP;", trans_pref);
1115 if (rt->server_type != RTSP_SERVER_REAL)
1116 av_strlcat(transport, "unicast;", sizeof(transport));
1117 av_strlcatf(transport, sizeof(transport),
1118 "client_port=%d", port);
f830c9a4
RB
1119 if (rt->transport == RTSP_TRANSPORT_RTP &&
1120 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1121 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1122 }
1123
1124 /* RTP/TCP */
90abbdba 1125 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1126 /** For WMS streams, the application streams are only used for
1127 * UDP. When trying to set it up for TCP streams, the server
1128 * will return an error. Therefore, we skip those streams. */
1129 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800
RB
1130 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1131 CODEC_TYPE_DATA)
090438cc 1132 continue;
0ad306bc 1133 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1134 "%s/TCP;", trans_pref);
1135 if (rt->server_type == RTSP_SERVER_WMS)
1136 av_strlcat(transport, "unicast;", sizeof(transport));
1137 av_strlcatf(transport, sizeof(transport),
1138 "interleaved=%d-%d",
1139 interleave, interleave + 1);
1140 interleave += 2;
1617ad97
FB
1141 }
1142
90abbdba 1143 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1144 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1145 "%s/UDP;multicast", trans_pref);
1617ad97 1146 }
69adcc4f
MS
1147 if (s->oformat) {
1148 av_strlcat(transport, ";mode=receive", sizeof(transport));
1149 } else if (rt->server_type == RTSP_SERVER_REAL ||
2efc97c2 1150 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1151 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1152 snprintf(cmd, sizeof(cmd),
b6892136
FB
1153 "SETUP %s RTSP/1.0\r\n"
1154 "Transport: %s\r\n",
1617ad97 1155 rtsp_st->control_url, transport);
2e889ae4 1156 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1157 char real_res[41], real_csum[9];
1158 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1159 real_challenge);
1160 av_strlcatf(cmd, sizeof(cmd),
1161 "If-Match: %s\r\n"
1162 "RealChallenge2: %s, sd=%s\r\n",
1163 rt->session_id, real_res, real_csum);
1164 }
3307e6ea 1165 ff_rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1166 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1167 err = 1;
1168 goto fail;
7e6ca34f
RB
1169 } else if (reply->status_code != RTSP_STATUS_OK ||
1170 reply->nb_transports != 1) {
1617ad97
FB
1171 err = AVERROR_INVALIDDATA;
1172 goto fail;
1173 }
1174
1175 /* XXX: same protocol for all streams is required */
1176 if (i > 0) {
119b4668
RB
1177 if (reply->transports[0].lower_transport != rt->lower_transport ||
1178 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1179 err = AVERROR_INVALIDDATA;
1180 goto fail;
1181 }
1182 } else {
90abbdba 1183 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1184 rt->transport = reply->transports[0].transport;
1617ad97
FB
1185 }
1186
1187 /* close RTP connection if not choosen */
90abbdba
RB
1188 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1189 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1190 url_close(rtsp_st->rtp_handle);
1191 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1192 }
1193
90abbdba
RB
1194 switch(reply->transports[0].lower_transport) {
1195 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1196 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1197 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1198 break;
115329f1 1199
c8965800
RB
1200 case RTSP_LOWER_TRANSPORT_UDP: {
1201 char url[1024];
1202
1203 /* XXX: also use address if specified */
57b5555c
MS
1204 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1205 reply->transports[0].server_port_min, NULL);
c8965800
RB
1206 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1207 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1208 err = AVERROR_INVALIDDATA;
1209 goto fail;
1617ad97 1210 }
9c8fa20d
MS
1211 /* Try to initialize the connection state in a
1212 * potential NAT router by sending dummy packets.
1213 * RTP/RTCP dummy packets are used for RDT, too.
1214 */
30ff7c5c 1215 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1216 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1217 break;
c8965800
RB
1218 }
1219 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1220 char url[1024];
1221 struct in_addr in;
1222 int port, ttl;
1223
1224 if (reply->transports[0].destination) {
1225 in.s_addr = htonl(reply->transports[0].destination);
1226 port = reply->transports[0].port_min;
1227 ttl = reply->transports[0].ttl;
1228 } else {
1229 in = rtsp_st->sdp_ip;
1230 port = rtsp_st->sdp_port;
1231 ttl = rtsp_st->sdp_ttl;
1232 }
57b5555c
MS
1233 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1234 port, "?ttl=%d", ttl);
c8965800
RB
1235 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1236 err = AVERROR_INVALIDDATA;
1237 goto fail;
1617ad97
FB
1238 }
1239 break;
1240 }
c8965800 1241 }
d1ccf0e0 1242
ee0cb67f 1243 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1244 goto fail;
1617ad97
FB
1245 }
1246
30e79845
RB
1247 if (reply->timeout > 0)
1248 rt->timeout = reply->timeout;
1249
2e889ae4 1250 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1251 rt->need_subscription = 1;
1252
53620bba
RB
1253 return 0;
1254
1255fail:
c8965800 1256 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1257 if (rt->rtsp_streams[i]->rtp_handle) {
1258 url_close(rt->rtsp_streams[i]->rtp_handle);
1259 rt->rtsp_streams[i]->rtp_handle = NULL;
1260 }
1261 }
53620bba
RB
1262 return err;
1263}
1264
1ced9da3
LA
1265static int rtsp_read_play(AVFormatContext *s)
1266{
1267 RTSPState *rt = s->priv_data;
1268 RTSPMessageHeader reply1, *reply = &reply1;
1269 char cmd[1024];
1270
1271 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1272
1273 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1274 if (rt->state == RTSP_STATE_PAUSED) {
1275 snprintf(cmd, sizeof(cmd),
1276 "PLAY %s RTSP/1.0\r\n",
00eb13e0 1277 rt->control_uri);
1ced9da3
LA
1278 } else {
1279 snprintf(cmd, sizeof(cmd),
1280 "PLAY %s RTSP/1.0\r\n"
1281 "Range: npt=%0.3f-\r\n",
00eb13e0 1282 rt->control_uri,
1ced9da3
LA
1283 (double)rt->seek_timestamp / AV_TIME_BASE);
1284 }
3307e6ea 1285 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1ced9da3
LA
1286 if (reply->status_code != RTSP_STATUS_OK) {
1287 return -1;
1288 }
1289 }
c02fd3d2 1290 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1291 return 0;
1292}
1293
e23d195d
MS
1294static int rtsp_setup_input_streams(AVFormatContext *s)
1295{
1296 RTSPState *rt = s->priv_data;
1297 RTSPMessageHeader reply1, *reply = &reply1;
1298 char cmd[1024];
1299 unsigned char *content = NULL;
1300 int ret;
1301
1302 /* describe the stream */
1303 snprintf(cmd, sizeof(cmd),
1304 "DESCRIBE %s RTSP/1.0\r\n"
1305 "Accept: application/sdp\r\n",
db76ca7f 1306 rt->control_uri);
e23d195d
MS
1307 if (rt->server_type == RTSP_SERVER_REAL) {
1308 /**
1309 * The Require: attribute is needed for proper streaming from
1310 * Realmedia servers.
1311 */
1312 av_strlcat(cmd,
1313 "Require: com.real.retain-entity-for-setup\r\n",
1314 sizeof(cmd));
1315 }
3307e6ea 1316 ff_rtsp_send_cmd(s, cmd, reply, &content);
e23d195d
MS
1317 if (!content)
1318 return AVERROR_INVALIDDATA;
1319 if (reply->status_code != RTSP_STATUS_OK) {
1320 av_freep(&content);
1321 return AVERROR_INVALIDDATA;
1322 }
1323
1324 /* now we got the SDP description, we parse it */
1325 ret = sdp_parse(s, (const char *)content);
1326 av_freep(&content);
1327 if (ret < 0)
1328 return AVERROR_INVALIDDATA;
1329
1330 return 0;
1331}
1332
26cb700c 1333static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
3e24c770
MS
1334{
1335 RTSPState *rt = s->priv_data;
1336 RTSPMessageHeader reply1, *reply = &reply1;
1337 char cmd[1024];
1338 int i;
1339 char *sdp;
26cb700c 1340 AVFormatContext sdp_ctx, *ctx_array[1];
3e24c770
MS
1341
1342 /* Announce the stream */
1343 snprintf(cmd, sizeof(cmd),
1344 "ANNOUNCE %s RTSP/1.0\r\n"
1345 "Content-Type: application/sdp\r\n",
db76ca7f 1346 rt->control_uri);
3e24c770
MS
1347 sdp = av_mallocz(8192);
1348 if (sdp == NULL)
1349 return AVERROR(ENOMEM);
26cb700c
MS
1350 /* We create the SDP based on the RTSP AVFormatContext where we
1351 * aren't allowed to change the filename field. (We create the SDP
1352 * based on the RTSP context since the contexts for the RTP streams
1353 * don't exist yet.) In order to specify a custom URL with the actual
1354 * peer IP instead of the originally specified hostname, we create
1355 * a temporary copy of the AVFormatContext, where the custom URL is set.
1356 *
1357 * FIXME: Create the SDP without copying the AVFormatContext.
1358 * This either requires setting up the RTP stream AVFormatContexts
1359 * already here (complicating things immensely) or getting a more
1360 * flexible SDP creation interface.
1361 */
1362 sdp_ctx = *s;
1363 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1364 "rtsp", NULL, addr, -1, NULL);
1365 ctx_array[0] = &sdp_ctx;
1366 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
3e24c770
MS
1367 av_free(sdp);
1368 return AVERROR_INVALIDDATA;
1369 }
1370 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
3307e6ea 1371 ff_rtsp_send_cmd_with_content(s, cmd, reply, NULL, sdp, strlen(sdp));
3e24c770
MS
1372 av_free(sdp);
1373 if (reply->status_code != RTSP_STATUS_OK)
1374 return AVERROR_INVALIDDATA;
1375
1376 /* Set up the RTSPStreams for each AVStream */
1377 for (i = 0; i < s->nb_streams; i++) {
1378 RTSPStream *rtsp_st;
1379 AVStream *st = s->streams[i];
1380
1381 rtsp_st = av_mallocz(sizeof(RTSPStream));
1382 if (!rtsp_st)
1383 return AVERROR(ENOMEM);
1384 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1385
1386 st->priv_data = rtsp_st;
1387 rtsp_st->stream_index = i;
1388
db76ca7f 1389 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
3e24c770
MS
1390 /* Note, this must match the relative uri set in the sdp content */
1391 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1392 "/streamid=%d", i);
1393 }
1394
1395 return 0;
1396}
1397
3307e6ea 1398int ff_rtsp_connect(AVFormatContext *s)
53620bba
RB
1399{
1400 RTSPState *rt = s->priv_data;
921da217
LB
1401 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1402 char *option_list, *option, *filename;
53620bba 1403 URLContext *rtsp_hd;
03f8fc08 1404 int port, err, tcp_fd;
a9e534d5 1405 RTSPMessageHeader reply1, *reply = &reply1;
90abbdba 1406 int lower_transport_mask = 0;
1cf151e9 1407 char real_challenge[64];
03f8fc08
MS
1408 struct sockaddr_storage peer;
1409 socklen_t peer_len = sizeof(peer);
57b5555c
MS
1410
1411 if (!ff_network_init())
1412 return AVERROR(EIO);
c8965800 1413redirect:
53620bba 1414 /* extract hostname and port */
c5c6e67c 1415 ff_url_split(NULL, 0, auth, sizeof(auth),
f984dcf6 1416 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897
RB
1417 if (*auth) {
1418 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1419
1420 if (!(rt->auth_b64 = av_malloc(b64_len)))
1421 return AVERROR(ENOMEM);
1422 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1423 err = AVERROR(EINVAL);
1424 goto fail;
1425 }
1426 }
53620bba
RB
1427 if (port < 0)
1428 port = RTSP_DEFAULT_PORT;
1429
1430 /* search for options */
1431 option_list = strchr(path, '?');
1432 if (option_list) {
921da217 1433 filename = strchr(s->filename, '?');
c8965800 1434 while (option_list) {
53620bba 1435 /* move the option pointer */
921da217 1436 option = ++option_list;
53620bba
RB
1437 option_list = strchr(option_list, '&');
1438 if (option_list)
921da217
LB
1439 *option_list = 0;
1440
53620bba 1441 /* handle the options */
c8965800 1442 if (!strcmp(option, "udp")) {
90abbdba 1443 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1444 } else if (!strcmp(option, "multicast")) {
90abbdba 1445 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1446 } else if (!strcmp(option, "tcp")) {
90abbdba 1447 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1448 } else {
921da217
LB
1449 strcpy(++filename, option);
1450 filename += strlen(option);
1451 if (option_list) *filename = '&';
1452 }
53620bba 1453 }
921da217 1454 *filename = 0;
53620bba
RB
1455 }
1456
90abbdba 1457 if (!lower_transport_mask)
2a1d51c5 1458 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba 1459
3e24c770
MS
1460 if (s->oformat) {
1461 /* Only UDP output is supported at the moment. */
1462 lower_transport_mask &= 1 << RTSP_LOWER_TRANSPORT_UDP;
1463 if (!lower_transport_mask) {
1464 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
1465 "only UDP is supported for output.\n");
1466 err = AVERROR(EINVAL);
1467 goto fail;
1468 }
1469 }
1470
53620bba 1471 /* open the tcp connexion */
57b5555c 1472 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
f9337897
RB
1473 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1474 err = AVERROR(EIO);
1475 goto fail;
1476 }
53620bba
RB
1477 rt->rtsp_hd = rtsp_hd;
1478 rt->seq = 0;
1479
03f8fc08
MS
1480 tcp_fd = url_get_file_handle(rtsp_hd);
1481 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1482 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1483 NULL, 0, NI_NUMERICHOST);
1484 }
1485
c8965800
RB
1486 /* request options supported by the server; this also detects server
1487 * type */
00eb13e0
AS
1488 av_strlcpy(rt->control_uri, s->filename,
1489 sizeof(rt->control_uri));
1cf151e9
RB
1490 for (rt->server_type = RTSP_SERVER_RTP;;) {
1491 snprintf(cmd, sizeof(cmd),
db76ca7f 1492 "OPTIONS %s RTSP/1.0\r\n", rt->control_uri);
2e889ae4 1493 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1494 av_strlcat(cmd,
1495 /**
1496 * The following entries are required for proper
1497 * streaming from a Realmedia server. They are
1498 * interdependent in some way although we currently
1499 * don't quite understand how. Values were copied
1500 * from mplayer SVN r23589.
1501 * @param CompanyID is a 16-byte ID in base64
1502 * @param ClientChallenge is a 16-byte ID in hex
1503 */
1504 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1505 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1506 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1507 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1508 sizeof(cmd));
3307e6ea 1509 ff_rtsp_send_cmd(s, cmd, reply, NULL);
1cf151e9
RB
1510 if (reply->status_code != RTSP_STATUS_OK) {
1511 err = AVERROR_INVALIDDATA;
1512 goto fail;
1513 }
1514
1515 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1516 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1517 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1518 continue;
7a86bafa
RB
1519 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1520 rt->server_type = RTSP_SERVER_WMS;
c8965800 1521 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1522 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1523 break;
1524 }
1525
3e24c770 1526 if (s->iformat)
2efc97c2 1527 err = rtsp_setup_input_streams(s);
3e24c770 1528 else
26cb700c 1529 err = rtsp_setup_output_streams(s, host);
e23d195d 1530 if (err)
53620bba 1531 goto fail;
53620bba 1532
8a8754d8 1533 do {
c8965800
RB
1534 int lower_transport = ff_log2_tab[lower_transport_mask &
1535 ~(lower_transport_mask - 1)];
8a8754d8 1536
90abbdba 1537 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1538 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1539 real_challenge : NULL);
8a8754d8 1540 if (err < 0)
7e6ca34f 1541 goto fail;
90abbdba
RB
1542 lower_transport_mask &= ~(1 << lower_transport);
1543 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1544 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1545 goto fail;
1546 }
1547 } while (err);
53620bba 1548
ff762d6e 1549 rt->state = RTSP_STATE_IDLE;
c8965800 1550 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1551 return 0;
1552 fail:
3307e6ea 1553 ff_rtsp_close_streams(s);
1617ad97 1554 url_close(rt->rtsp_hd);
35cfd646 1555 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
d243ba30
LB
1556 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1557 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1558 reply->status_code,
1559 s->filename);
1560 goto redirect;
1561 }
57b5555c 1562 ff_network_close();
1617ad97
FB
1563 return err;
1564}
6f5a3d0a 1565#endif
1617ad97 1566
6f5a3d0a 1567#if CONFIG_RTSP_DEMUXER
4280f9bb
MS
1568static int rtsp_read_header(AVFormatContext *s,
1569 AVFormatParameters *ap)
1570{
1571 RTSPState *rt = s->priv_data;
1572 int ret;
1573
3307e6ea 1574 ret = ff_rtsp_connect(s);
4280f9bb
MS
1575 if (ret)
1576 return ret;
1577
1578 if (ap->initial_pause) {
1579 /* do not start immediately */
1580 } else {
1581 if (rtsp_read_play(s) < 0) {
3307e6ea 1582 ff_rtsp_close_streams(s);
4280f9bb
MS
1583 url_close(rt->rtsp_hd);
1584 return AVERROR_INVALIDDATA;
1585 }
1586 }
1587
1588 return 0;
1589}
1590
0e59034e
RB
1591static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1592 uint8_t *buf, int buf_size)
1593{
1594 RTSPState *rt = s->priv_data;
1595 RTSPStream *rtsp_st;
1596 fd_set rfds;
1597 int fd, fd_max, n, i, ret, tcp_fd;
1598 struct timeval tv;
1599
c8965800 1600 for (;;) {
0e59034e
RB
1601 if (url_interrupt_cb())
1602 return AVERROR(EINTR);
1603 FD_ZERO(&rfds);
1604 if (rt->rtsp_hd) {
1605 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1606 FD_SET(tcp_fd, &rfds);
1607 } else {
1608 fd_max = 0;
1609 tcp_fd = -1;
1610 }
c8965800 1611 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1612 rtsp_st = rt->rtsp_streams[i];
1613 if (rtsp_st->rtp_handle) {
1614 /* currently, we cannot probe RTCP handle because of
1615 * blocking restrictions */
1616 fd = url_get_file_handle(rtsp_st->rtp_handle);
1617 if (fd > fd_max)
1618 fd_max = fd;
1619 FD_SET(fd, &rfds);
1620 }
1621 }
1622 tv.tv_sec = 0;
1623 tv.tv_usec = 100 * 1000;
1624 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1625 if (n > 0) {
c8965800 1626 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1627 rtsp_st = rt->rtsp_streams[i];
1628 if (rtsp_st->rtp_handle) {
1629 fd = url_get_file_handle(rtsp_st->rtp_handle);
1630 if (FD_ISSET(fd, &rfds)) {
1631 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1632 if (ret > 0) {
1633 *prtsp_st = rtsp_st;
1634 return ret;
1635 }
1636 }
1637 }
1638 }
1639#if CONFIG_RTSP_DEMUXER
27000636 1640 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1641 RTSPMessageHeader reply;
1642
3307e6ea 1643 ff_rtsp_read_reply(s, &reply, NULL, 0);
0e59034e 1644 /* XXX: parse message */
c02fd3d2 1645 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1646 return 0;
1647 }
1648#endif
1649 }
1650 }
1651}
1652
8b1ab7bf
FB
1653static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1654 uint8_t *buf, int buf_size)
1617ad97
FB
1655{
1656 RTSPState *rt = s->priv_data;
b6892136 1657 int id, len, i, ret;
1617ad97 1658 RTSPStream *rtsp_st;
1617ad97 1659
b6892136 1660#ifdef DEBUG_RTP_TCP
67c9cd69 1661 dprintf(s, "tcp_read_packet:\n");
b6892136 1662#endif
c8965800
RB
1663redo:
1664 for (;;) {
7e726132
RB
1665 RTSPMessageHeader reply;
1666
3307e6ea 1667 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
7e726132 1668 if (ret == -1)
8b1ab7bf 1669 return -1;
7e726132 1670 if (ret == 1) /* received '$' */
1617ad97 1671 break;
7e726132 1672 /* XXX: parse message */
c02fd3d2 1673 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1674 return 0;
1617ad97 1675 }
0e848977 1676 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1677 if (ret != 3)
8b1ab7bf 1678 return -1;
c8965800 1679 id = buf[0];
80fb8234 1680 len = AV_RB16(buf + 1);
b6892136 1681#ifdef DEBUG_RTP_TCP
67c9cd69 1682 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1683#endif
8b1ab7bf 1684 if (len > buf_size || len < 12)
1617ad97
FB
1685 goto redo;
1686 /* get the data */
0e848977 1687 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1688 if (ret != len)
8b1ab7bf 1689 return -1;
985b05d3 1690 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1691 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1692 return -1;
115329f1 1693
1617ad97 1694 /* find the matching stream */
c8965800 1695 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1696 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1697 if (id >= rtsp_st->interleaved_min &&
1698 id <= rtsp_st->interleaved_max)
1617ad97
FB
1699 goto found;
1700 }
1701 goto redo;
c8965800 1702found:
8b1ab7bf
FB
1703 *prtsp_st = rtsp_st;
1704 return len;
1617ad97
FB
1705}
1706
0e59034e
RB
1707static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1708{
1709 RTSPState *rt = s->priv_data;
1710 int ret, len;
1711 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1712 RTSPStream *rtsp_st;
1713
1714 /* get next frames from the same RTP packet */
1715 if (rt->cur_transport_priv) {
c8965800 1716 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1717 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1718 } else
0e59034e
RB
1719 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1720 if (ret == 0) {
1721 rt->cur_transport_priv = NULL;
1722 return 0;
1723 } else if (ret == 1) {
1724 return 0;
c8965800 1725 } else
0e59034e 1726 rt->cur_transport_priv = NULL;
0e59034e
RB
1727 }
1728
1729 /* read next RTP packet */
1730 redo:
1731 switch(rt->lower_transport) {
1732 default:
1733#if CONFIG_RTSP_DEMUXER
1734 case RTSP_LOWER_TRANSPORT_TCP:
1735 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1736 break;
1737#endif
1738 case RTSP_LOWER_TRANSPORT_UDP:
1739 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1740 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1741 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1742 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1743 break;
1744 }
1745 if (len < 0)
1746 return len;
1747 if (len == 0)
1748 return AVERROR_EOF;
c8965800 1749 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1750 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
c8965800 1751 } else
0e59034e
RB
1752 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1753 if (ret < 0)
1754 goto redo;
c8965800 1755 if (ret == 1)
0e59034e
RB
1756 /* more packets may follow, so we save the RTP context */
1757 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1758
1759 return ret;
1760}
1761
c8965800 1762static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1763{
1764 RTSPState *rt = s->priv_data;
98713182 1765 int ret;
30e79845
RB
1766 RTSPMessageHeader reply1, *reply = &reply1;
1767 char cmd[1024];
8b1ab7bf 1768
572c6a38 1769 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1770 int i;
572c6a38 1771 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1772
572c6a38
RB
1773 for (i = 0; i < s->nb_streams; i++)
1774 cache[i] = s->streams[i]->discard;
1775
1776 if (!rt->need_subscription) {
1777 if (memcmp (cache, rt->real_setup_cache,
1778 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1779 snprintf(cmd, sizeof(cmd),
7eaa646f
RB
1780 "SET_PARAMETER %s RTSP/1.0\r\n"
1781 "Unsubscribe: %s\r\n",
00eb13e0 1782 rt->control_uri, rt->last_subscription);
3307e6ea 1783 ff_rtsp_send_cmd(s, cmd, reply, NULL);
572c6a38
RB
1784 if (reply->status_code != RTSP_STATUS_OK)
1785 return AVERROR_INVALIDDATA;
1786 rt->need_subscription = 1;
1787 }
1256d16b 1788 }
1256d16b 1789
572c6a38
RB
1790 if (rt->need_subscription) {
1791 int r, rule_nr, first = 1;
1792
1793 memcpy(rt->real_setup_cache, cache,
1794 sizeof(enum AVDiscard) * s->nb_streams);
1795 rt->last_subscription[0] = 0;
1796
1797 snprintf(cmd, sizeof(cmd),
1798 "SET_PARAMETER %s RTSP/1.0\r\n"
1799 "Subscribe: ",
00eb13e0 1800 rt->control_uri);
572c6a38
RB
1801 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1802 rule_nr = 0;
1803 for (r = 0; r < s->nb_streams; r++) {
1804 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1805 if (s->streams[r]->discard != AVDISCARD_ALL) {
1806 if (!first)
1807 av_strlcat(rt->last_subscription, ",",
1808 sizeof(rt->last_subscription));
1809 ff_rdt_subscribe_rule(
1810 rt->last_subscription,
1811 sizeof(rt->last_subscription), i, rule_nr);
1812 first = 0;
1813 }
1814 rule_nr++;
1815 }
1816 }
1817 }
1818 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
3307e6ea 1819 ff_rtsp_send_cmd(s, cmd, reply, NULL);
572c6a38
RB
1820 if (reply->status_code != RTSP_STATUS_OK)
1821 return AVERROR_INVALIDDATA;
1822 rt->need_subscription = 0;
1823
c02fd3d2 1824 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1825 rtsp_read_play (s);
1826 }
1256d16b
RB
1827 }
1828
d7250724 1829 ret = rtsp_fetch_packet(s, pkt);
c8965800 1830 if (ret < 0)
98713182 1831 return ret;
30e79845
RB
1832
1833 /* send dummy request to keep TCP connection alive */
1834 if ((rt->server_type == RTSP_SERVER_WMS ||
1835 rt->server_type == RTSP_SERVER_REAL) &&
1836 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1837 if (rt->server_type == RTSP_SERVER_WMS) {
1838 snprintf(cmd, sizeof(cmd) - 1,
1839 "GET_PARAMETER %s RTSP/1.0\r\n",
00eb13e0 1840 rt->control_uri);
3307e6ea 1841 ff_rtsp_send_cmd_async(s, cmd);
30e79845 1842 } else {
3307e6ea 1843 ff_rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n");
30e79845
RB
1844 }
1845 }
1846
8b1ab7bf 1847 return 0;
1617ad97
FB
1848}
1849
ff762d6e
FB
1850/* pause the stream */
1851static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1852{
ff762d6e 1853 RTSPState *rt = s->priv_data;
a9e534d5 1854 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34
FB
1855 char cmd[1024];
1856
b7b8fc34 1857 rt = s->priv_data;
115329f1 1858
c02fd3d2 1859 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1860 return 0;
2e889ae4 1861 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1862 snprintf(cmd, sizeof(cmd),
1863 "PAUSE %s RTSP/1.0\r\n",
00eb13e0 1864 rt->control_uri);
3307e6ea 1865 ff_rtsp_send_cmd(s, cmd, reply, NULL);
99b2ac07
RB
1866 if (reply->status_code != RTSP_STATUS_OK) {
1867 return -1;
1868 }
1256d16b 1869 }
5f86057f
RB
1870 rt->state = RTSP_STATE_PAUSED;
1871 return 0;
b7b8fc34
FB
1872}
1873
115329f1 1874static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1875 int64_t timestamp, int flags)
ff762d6e
FB
1876{
1877 RTSPState *rt = s->priv_data;
115329f1 1878
c8965800
RB
1879 rt->seek_timestamp = av_rescale_q(timestamp,
1880 s->streams[stream_index]->time_base,
1881 AV_TIME_BASE_Q);
ff762d6e
FB
1882 switch(rt->state) {
1883 default:
1884 case RTSP_STATE_IDLE:
1885 break;
c02fd3d2 1886 case RTSP_STATE_STREAMING:
ec606b36
LB
1887 if (rtsp_read_pause(s) != 0)
1888 return -1;
1889 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1890 if (rtsp_read_play(s) != 0)
1891 return -1;
1892 break;
1893 case RTSP_STATE_PAUSED:
1894 rt->state = RTSP_STATE_IDLE;
1895 break;
1896 }
1897 return 0;
1898}
1899
1617ad97
FB
1900static int rtsp_read_close(AVFormatContext *s)
1901{
1902 RTSPState *rt = s->priv_data;
1617ad97
FB
1903 char cmd[1024];
1904
b6892136 1905#if 0
1617ad97 1906 /* NOTE: it is valid to flush the buffer here */
90abbdba 1907 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1908 url_fclose(&rt->rtsp_gb);
1909 }
b6892136 1910#endif
115329f1 1911 snprintf(cmd, sizeof(cmd),
b6892136 1912 "TEARDOWN %s RTSP/1.0\r\n",
db76ca7f 1913 rt->control_uri);
3307e6ea 1914 ff_rtsp_send_cmd_async(s, cmd);
1617ad97 1915
3307e6ea 1916 ff_rtsp_close_streams(s);
1617ad97 1917 url_close(rt->rtsp_hd);
57b5555c 1918 ff_network_close();
1617ad97
FB
1919 return 0;
1920}
1921
d2a067d1 1922AVInputFormat rtsp_demuxer = {
1617ad97 1923 "rtsp",
bde15e74 1924 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1925 sizeof(RTSPState),
1926 rtsp_probe,
1927 rtsp_read_header,
1928 rtsp_read_packet,
1929 rtsp_read_close,
ff762d6e 1930 rtsp_read_seek,
bb76a117 1931 .flags = AVFMT_NOFILE,
ff762d6e
FB
1932 .read_play = rtsp_read_play,
1933 .read_pause = rtsp_read_pause,
1617ad97 1934};
96862926 1935#endif
1617ad97 1936
cb1fdc61 1937static int sdp_probe(AVProbeData *p1)
93ced3e8 1938{
0e1ceacd 1939 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1940
1941 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1942 while (p < p_end && *p != '\0') {
c8965800
RB
1943 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1944 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1945 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 1946
c8965800 1947 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 1948 if (++p >= p_end)
cb1fdc61 1949 break;
cb1fdc61
FB
1950 if (*p == '\r')
1951 p++;
1952 }
93ced3e8
FB
1953 return 0;
1954}
1955
1956#define SDP_MAX_SIZE 8192
1957
c8965800 1958static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 1959{
8b1ab7bf 1960 RTSPState *rt = s->priv_data;
93ced3e8
FB
1961 RTSPStream *rtsp_st;
1962 int size, i, err;
1963 char *content;
1964 char url[1024];
1965
57b5555c
MS
1966 if (!ff_network_init())
1967 return AVERROR(EIO);
1968
93ced3e8
FB
1969 /* read the whole sdp file */
1970 /* XXX: better loading */
1971 content = av_malloc(SDP_MAX_SIZE);
899681cd 1972 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1973 if (size <= 0) {
1974 av_free(content);
1975 return AVERROR_INVALIDDATA;
1976 }
1977 content[size] ='\0';
1978
1979 sdp_parse(s, content);
1980 av_free(content);
1981
1982 /* open each RTP stream */
c8965800 1983 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1984 rtsp_st = rt->rtsp_streams[i];
115329f1 1985
57b5555c
MS
1986 ff_url_join(url, sizeof(url), "rtp", NULL,
1987 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
1988 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
1989 rtsp_st->sdp_ttl);
dbf30963 1990 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1991 err = AVERROR_INVALIDDATA;
1992 goto fail;
1993 }
ee0cb67f 1994 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1995 goto fail;
93ced3e8
FB
1996 }
1997 return 0;
c8965800 1998fail:
3307e6ea 1999 ff_rtsp_close_streams(s);
57b5555c 2000 ff_network_close();
93ced3e8
FB
2001 return err;
2002}
2003
93ced3e8
FB
2004static int sdp_read_close(AVFormatContext *s)
2005{
3307e6ea 2006 ff_rtsp_close_streams(s);
57b5555c 2007 ff_network_close();
93ced3e8
FB
2008 return 0;
2009}
2010
ff70e601 2011AVInputFormat sdp_demuxer = {
93ced3e8 2012 "sdp",
bde15e74 2013 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
2014 sizeof(RTSPState),
2015 sdp_probe,
2016 sdp_read_header,
d7250724 2017 rtsp_fetch_packet,
93ced3e8
FB
2018 sdp_read_close,
2019};