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