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Remove table that was forgotten in the split.
[FFMpeg-mirror/ordered_chapters.git] / libavformat / rtsp.c
blob320d45ce7f12d870592577b6ff51df3fd35600c1
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/avstring.h"
26 #include "libavutil/intreadwrite.h"
27 #include "avformat.h"
28
29 #include <sys/time.h>
30 #if HAVE_SYS_SELECT_H
31 #include <sys/select.h>
32 #endif
33 #include <strings.h>
34 #include "network.h"
35 #include "rtsp.h"
36
37 #include "rtpdec.h"
38 #include "rdt.h"
39 #include "rtp_asf.h"
40 #include "rtp_vorbis.h"
41
42 //#define DEBUG
43 //#define DEBUG_RTP_TCP
44
45 static int rtsp_read_play(AVFormatContext *s);
46
47 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
48 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
49 #endif
50
51 static int rtsp_probe(AVProbeData *p)
52 {
53 if (av_strstart(p->filename, "rtsp:", NULL))
54 return AVPROBE_SCORE_MAX;
55 return 0;
56 }
57
58 #define SPACE_CHARS " \t\r\n"
59 /* we use memchr() instead of strchr() here because strchr() will return
60 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
61 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
62 static void skip_spaces(const char **pp)
63 {
64 const char *p;
65 p = *pp;
66 while (redir_isspace(*p))
67 p++;
68 *pp = p;
69 }
70
71 static void get_word_until_chars(char *buf, int buf_size,
72 const char *sep, const char **pp)
73 {
74 const char *p;
75 char *q;
76
77 p = *pp;
78 skip_spaces(&p);
79 q = buf;
80 while (!strchr(sep, *p) && *p != '\0') {
81 if ((q - buf) < buf_size - 1)
82 *q++ = *p;
83 p++;
84 }
85 if (buf_size > 0)
86 *q = '\0';
87 *pp = p;
88 }
89
90 static void get_word_sep(char *buf, int buf_size, const char *sep,
91 const char **pp)
92 {
93 if (**pp == '/') (*pp)++;
94 get_word_until_chars(buf, buf_size, sep, pp);
95 }
96
97 static void get_word(char *buf, int buf_size, const char **pp)
98 {
99 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
100 }
101
102 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
103 params>] */
104 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
105 {
106 char buf[256];
107 int i;
108 AVCodec *c;
109 const char *c_name;
110
111 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
112 see if we can handle this kind of payload */
113 get_word_sep(buf, sizeof(buf), "/", &p);
114 if (payload_type >= RTP_PT_PRIVATE) {
115 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
116 while(handler) {
117 if (!strcasecmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
118 codec->codec_id = handler->codec_id;
119 rtsp_st->dynamic_handler= handler;
120 if(handler->open) {
121 rtsp_st->dynamic_protocol_context= handler->open();
122 }
123 break;
124 }
125 handler= handler->next;
126 }
127 } else {
128 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
129 /* search into AVRtpPayloadTypes[] */
130 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
131 }
132
133 c = avcodec_find_decoder(codec->codec_id);
134 if (c && c->name)
135 c_name = c->name;
136 else
137 c_name = (char *)NULL;
138
139 if (c_name) {
140 get_word_sep(buf, sizeof(buf), "/", &p);
141 i = atoi(buf);
142 switch (codec->codec_type) {
143 case CODEC_TYPE_AUDIO:
144 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
145 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
146 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
147 if (i > 0) {
148 codec->sample_rate = i;
149 get_word_sep(buf, sizeof(buf), "/", &p);
150 i = atoi(buf);
151 if (i > 0)
152 codec->channels = i;
153 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
154 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
155 }
156 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
157 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
158 break;
159 case CODEC_TYPE_VIDEO:
160 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
161 break;
162 default:
163 break;
164 }
165 return 0;
166 }
167
168 return -1;
169 }
170
171 /* return the length and optionnaly the data */
172 static int hex_to_data(uint8_t *data, const char *p)
173 {
174 int c, len, v;
175
176 len = 0;
177 v = 1;
178 for(;;) {
179 skip_spaces(&p);
180 if (*p == '\0')
181 break;
182 c = toupper((unsigned char)*p++);
183 if (c >= '0' && c <= '9')
184 c = c - '0';
185 else if (c >= 'A' && c <= 'F')
186 c = c - 'A' + 10;
187 else
188 break;
189 v = (v << 4) | c;
190 if (v & 0x100) {
191 if (data)
192 data[len] = v;
193 len++;
194 v = 1;
195 }
196 }
197 return len;
198 }
199
200 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
201 char *attr, char *value)
202 {
203 switch (codec->codec_id) {
204 case CODEC_ID_MPEG4:
205 case CODEC_ID_AAC:
206 if (!strcmp(attr, "config")) {
207 /* decode the hexa encoded parameter */
208 int len = hex_to_data(NULL, value);
209 if (codec->extradata)
210 av_free(codec->extradata);
211 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
212 if (!codec->extradata)
213 return;
214 codec->extradata_size = len;
215 hex_to_data(codec->extradata, value);
216 }
217 break;
218 case CODEC_ID_VORBIS:
219 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
220 break;
221 default:
222 break;
223 }
224 return;
225 }
226
227 typedef struct {
228 const char *str;
229 uint16_t type;
230 uint32_t offset;
231 } AttrNameMap;
232
233 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
234 #define ATTR_NAME_TYPE_INT 0
235 #define ATTR_NAME_TYPE_STR 1
236 static const AttrNameMap attr_names[]=
237 {
238 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
239 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
240 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
241 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
242 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
243 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
244 {NULL, -1, -1},
245 };
246
247 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
248 * because it is used in rtp_h264.c, which is forthcoming.
249 */
250 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
251 {
252 skip_spaces(p);
253 if(**p) {
254 get_word_sep(attr, attr_size, "=", p);
255 if (**p == '=')
256 (*p)++;
257 get_word_sep(value, value_size, ";", p);
258 if (**p == ';')
259 (*p)++;
260 return 1;
261 }
262 return 0;
263 }
264
265 /* parse a SDP line and save stream attributes */
266 static void sdp_parse_fmtp(AVStream *st, const char *p)
267 {
268 char attr[256];
269 /* Vorbis setup headers can be up to 12KB and are sent base64
270 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
271 char value[16384];
272 int i;
273
274 RTSPStream *rtsp_st = st->priv_data;
275 AVCodecContext *codec = st->codec;
276 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
277
278 /* loop on each attribute */
279 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
280 {
281 /* grab the codec extra_data from the config parameter of the fmtp line */
282 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
283 attr, value);
284 /* Looking for a known attribute */
285 for (i = 0; attr_names[i].str; ++i) {
286 if (!strcasecmp(attr, attr_names[i].str)) {
287 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
288 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
289 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
290 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
291 }
292 }
293 }
294 }
295
296 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
297 * and end time.
298 * Used for seeking in the rtp stream.
299 */
300 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
301 {
302 char buf[256];
303
304 skip_spaces(&p);
305 if (!av_stristart(p, "npt=", &p))
306 return;
307
308 *start = AV_NOPTS_VALUE;
309 *end = AV_NOPTS_VALUE;
310
311 get_word_sep(buf, sizeof(buf), "-", &p);
312 *start = parse_date(buf, 1);
313 if (*p == '-') {
314 p++;
315 get_word_sep(buf, sizeof(buf), "-", &p);
316 *end = parse_date(buf, 1);
317 }
318 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
319 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
320 }
321
322 typedef struct SDPParseState {
323 /* SDP only */
324 struct in_addr default_ip;
325 int default_ttl;
326 int skip_media; ///< set if an unknown m= line occurs
327 } SDPParseState;
328
329 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
330 int letter, const char *buf)
331 {
332 RTSPState *rt = s->priv_data;
333 char buf1[64], st_type[64];
334 const char *p;
335 enum CodecType codec_type;
336 int payload_type, i;
337 AVStream *st;
338 RTSPStream *rtsp_st;
339 struct in_addr sdp_ip;
340 int ttl;
341
342 dprintf(s, "sdp: %c='%s'\n", letter, buf);
343
344 p = buf;
345 if (s1->skip_media && letter != 'm')
346 return;
347 switch(letter) {
348 case 'c':
349 get_word(buf1, sizeof(buf1), &p);
350 if (strcmp(buf1, "IN") != 0)
351 return;
352 get_word(buf1, sizeof(buf1), &p);
353 if (strcmp(buf1, "IP4") != 0)
354 return;
355 get_word_sep(buf1, sizeof(buf1), "/", &p);
356 if (inet_aton(buf1, &sdp_ip) == 0)
357 return;
358 ttl = 16;
359 if (*p == '/') {
360 p++;
361 get_word_sep(buf1, sizeof(buf1), "/", &p);
362 ttl = atoi(buf1);
363 }
364 if (s->nb_streams == 0) {
365 s1->default_ip = sdp_ip;
366 s1->default_ttl = ttl;
367 } else {
368 st = s->streams[s->nb_streams - 1];
369 rtsp_st = st->priv_data;
370 rtsp_st->sdp_ip = sdp_ip;
371 rtsp_st->sdp_ttl = ttl;
372 }
373 break;
374 case 's':
375 av_metadata_set(&s->metadata, "title", p);
376 break;
377 case 'i':
378 if (s->nb_streams == 0) {
379 av_metadata_set(&s->metadata, "comment", p);
380 break;
381 }
382 break;
383 case 'm':
384 /* new stream */
385 s1->skip_media = 0;
386 get_word(st_type, sizeof(st_type), &p);
387 if (!strcmp(st_type, "audio")) {
388 codec_type = CODEC_TYPE_AUDIO;
389 } else if (!strcmp(st_type, "video")) {
390 codec_type = CODEC_TYPE_VIDEO;
391 } else if (!strcmp(st_type, "application")) {
392 codec_type = CODEC_TYPE_DATA;
393 } else {
394 s1->skip_media = 1;
395 return;
396 }
397 rtsp_st = av_mallocz(sizeof(RTSPStream));
398 if (!rtsp_st)
399 return;
400 rtsp_st->stream_index = -1;
401 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
402
403 rtsp_st->sdp_ip = s1->default_ip;
404 rtsp_st->sdp_ttl = s1->default_ttl;
405
406 get_word(buf1, sizeof(buf1), &p); /* port */
407 rtsp_st->sdp_port = atoi(buf1);
408
409 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
410
411 /* XXX: handle list of formats */
412 get_word(buf1, sizeof(buf1), &p); /* format list */
413 rtsp_st->sdp_payload_type = atoi(buf1);
414
415 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
416 /* no corresponding stream */
417 } else {
418 st = av_new_stream(s, 0);
419 if (!st)
420 return;
421 st->priv_data = rtsp_st;
422 rtsp_st->stream_index = st->index;
423 st->codec->codec_type = codec_type;
424 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
425 /* if standard payload type, we can find the codec right now */
426 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
427 }
428 }
429 /* put a default control url */
430 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
431 break;
432 case 'a':
433 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
434 char proto[32];
435 /* get the control url */
436 st = s->streams[s->nb_streams - 1];
437 rtsp_st = st->priv_data;
438
439 /* XXX: may need to add full url resolution */
440 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
441 if (proto[0] == '\0') {
442 /* relative control URL */
443 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
444 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
445 } else {
446 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
447 }
448 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
449 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
450 get_word(buf1, sizeof(buf1), &p);
451 payload_type = atoi(buf1);
452 st = s->streams[s->nb_streams - 1];
453 rtsp_st = st->priv_data;
454 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
455 } else if (av_strstart(p, "fmtp:", &p)) {
456 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
457 get_word(buf1, sizeof(buf1), &p);
458 payload_type = atoi(buf1);
459 for(i = 0; i < s->nb_streams;i++) {
460 st = s->streams[i];
461 rtsp_st = st->priv_data;
462 if (rtsp_st->sdp_payload_type == payload_type) {
463 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
464 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
465 sdp_parse_fmtp(st, p);
466 }
467 } else {
468 sdp_parse_fmtp(st, p);
469 }
470 }
471 }
472 } else if(av_strstart(p, "framesize:", &p)) {
473 // let dynamic protocol handlers have a stab at the line.
474 get_word(buf1, sizeof(buf1), &p);
475 payload_type = atoi(buf1);
476 for(i = 0; i < s->nb_streams;i++) {
477 st = s->streams[i];
478 rtsp_st = st->priv_data;
479 if (rtsp_st->sdp_payload_type == payload_type) {
480 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
481 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
482 }
483 }
484 }
485 } else if(av_strstart(p, "range:", &p)) {
486 int64_t start, end;
487
488 // this is so that seeking on a streamed file can work.
489 rtsp_parse_range_npt(p, &start, &end);
490 s->start_time= start;
491 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
492 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
493 if (atoi(p) == 1)
494 rt->transport = RTSP_TRANSPORT_RDT;
495 } else {
496 if (rt->server_type == RTSP_SERVER_WMS)
497 ff_wms_parse_sdp_a_line(s, p);
498 if (s->nb_streams > 0) {
499 if (rt->server_type == RTSP_SERVER_REAL)
500 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
501
502 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
503 if (rtsp_st->dynamic_handler &&
504 rtsp_st->dynamic_handler->parse_sdp_a_line)
505 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
506 rtsp_st->dynamic_protocol_context, buf);
507 }
508 }
509 break;
510 }
511 }
512
513 static int sdp_parse(AVFormatContext *s, const char *content)
514 {
515 const char *p;
516 int letter;
517 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
518 * contain long SDP lines containing complete ASF Headers (several
519 * kB) or arrays of MDPR (RM stream descriptor) headers plus
520 * "rulebooks" describing their properties. Therefore, the SDP line
521 * buffer is large.
522 *
523 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
524 char buf[16384], *q;
525 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
526
527 memset(s1, 0, sizeof(SDPParseState));
528 p = content;
529 for(;;) {
530 skip_spaces(&p);
531 letter = *p;
532 if (letter == '\0')
533 break;
534 p++;
535 if (*p != '=')
536 goto next_line;
537 p++;
538 /* get the content */
539 q = buf;
540 while (*p != '\n' && *p != '\r' && *p != '\0') {
541 if ((q - buf) < sizeof(buf) - 1)
542 *q++ = *p;
543 p++;
544 }
545 *q = '\0';
546 sdp_parse_line(s, s1, letter, buf);
547 next_line:
548 while (*p != '\n' && *p != '\0')
549 p++;
550 if (*p == '\n')
551 p++;
552 }
553 return 0;
554 }
555
556 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
557 {
558 const char *p;
559 int v;
560
561 p = *pp;
562 skip_spaces(&p);
563 v = strtol(p, (char **)&p, 10);
564 if (*p == '-') {
565 p++;
566 *min_ptr = v;
567 v = strtol(p, (char **)&p, 10);
568 *max_ptr = v;
569 } else {
570 *min_ptr = v;
571 *max_ptr = v;
572 }
573 *pp = p;
574 }
575
576 /* XXX: only one transport specification is parsed */
577 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
578 {
579 char transport_protocol[16];
580 char profile[16];
581 char lower_transport[16];
582 char parameter[16];
583 RTSPTransportField *th;
584 char buf[256];
585
586 reply->nb_transports = 0;
587
588 for(;;) {
589 skip_spaces(&p);
590 if (*p == '\0')
591 break;
592
593 th = &reply->transports[reply->nb_transports];
594
595 get_word_sep(transport_protocol, sizeof(transport_protocol),
596 "/", &p);
597 if (!strcasecmp (transport_protocol, "rtp")) {
598 get_word_sep(profile, sizeof(profile), "/;,", &p);
599 lower_transport[0] = '\0';
600 /* rtp/avp/<protocol> */
601 if (*p == '/') {
602 get_word_sep(lower_transport, sizeof(lower_transport),
603 ";,", &p);
604 }
605 th->transport = RTSP_TRANSPORT_RTP;
606 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
607 !strcasecmp (transport_protocol, "x-real-rdt")) {
608 /* x-pn-tng/<protocol> */
609 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
610 profile[0] = '\0';
611 th->transport = RTSP_TRANSPORT_RDT;
612 }
613 if (!strcasecmp(lower_transport, "TCP"))
614 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
615 else
616 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
617
618 if (*p == ';')
619 p++;
620 /* get each parameter */
621 while (*p != '\0' && *p != ',') {
622 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
623 if (!strcmp(parameter, "port")) {
624 if (*p == '=') {
625 p++;
626 rtsp_parse_range(&th->port_min, &th->port_max, &p);
627 }
628 } else if (!strcmp(parameter, "client_port")) {
629 if (*p == '=') {
630 p++;
631 rtsp_parse_range(&th->client_port_min,
632 &th->client_port_max, &p);
633 }
634 } else if (!strcmp(parameter, "server_port")) {
635 if (*p == '=') {
636 p++;
637 rtsp_parse_range(&th->server_port_min,
638 &th->server_port_max, &p);
639 }
640 } else if (!strcmp(parameter, "interleaved")) {
641 if (*p == '=') {
642 p++;
643 rtsp_parse_range(&th->interleaved_min,
644 &th->interleaved_max, &p);
645 }
646 } else if (!strcmp(parameter, "multicast")) {
647 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
648 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
649 } else if (!strcmp(parameter, "ttl")) {
650 if (*p == '=') {
651 p++;
652 th->ttl = strtol(p, (char **)&p, 10);
653 }
654 } else if (!strcmp(parameter, "destination")) {
655 struct in_addr ipaddr;
656
657 if (*p == '=') {
658 p++;
659 get_word_sep(buf, sizeof(buf), ";,", &p);
660 if (inet_aton(buf, &ipaddr))
661 th->destination = ntohl(ipaddr.s_addr);
662 }
663 }
664 while (*p != ';' && *p != '\0' && *p != ',')
665 p++;
666 if (*p == ';')
667 p++;
668 }
669 if (*p == ',')
670 p++;
671
672 reply->nb_transports++;
673 }
674 }
675
676 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
677 {
678 const char *p;
679
680 /* NOTE: we do case independent match for broken servers */
681 p = buf;
682 if (av_stristart(p, "Session:", &p)) {
683 int t;
684 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
685 if (av_stristart(p, ";timeout=", &p) &&
686 (t = strtol(p, NULL, 10)) > 0) {
687 reply->timeout = t;
688 }
689 } else if (av_stristart(p, "Content-Length:", &p)) {
690 reply->content_length = strtol(p, NULL, 10);
691 } else if (av_stristart(p, "Transport:", &p)) {
692 rtsp_parse_transport(reply, p);
693 } else if (av_stristart(p, "CSeq:", &p)) {
694 reply->seq = strtol(p, NULL, 10);
695 } else if (av_stristart(p, "Range:", &p)) {
696 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
697 } else if (av_stristart(p, "RealChallenge1:", &p)) {
698 skip_spaces(&p);
699 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
700 } else if (av_stristart(p, "Server:", &p)) {
701 skip_spaces(&p);
702 av_strlcpy(reply->server, p, sizeof(reply->server));
703 } else if (av_stristart(p, "Notice:", &p) ||
704 av_stristart(p, "X-Notice:", &p)) {
705 reply->notice = strtol(p, NULL, 10);
706 }
707 }
708
709 /* skip a RTP/TCP interleaved packet */
710 static void rtsp_skip_packet(AVFormatContext *s)
711 {
712 RTSPState *rt = s->priv_data;
713 int ret, len, len1;
714 uint8_t buf[1024];
715
716 ret = url_read_complete(rt->rtsp_hd, buf, 3);
717 if (ret != 3)
718 return;
719 len = AV_RB16(buf + 1);
720
721 dprintf(s, "skipping RTP packet len=%d\n", len);
722
723 /* skip payload */
724 while (len > 0) {
725 len1 = len;
726 if (len1 > sizeof(buf))
727 len1 = sizeof(buf);
728 ret = url_read_complete(rt->rtsp_hd, buf, len1);
729 if (ret != len1)
730 return;
731 len -= len1;
732 }
733 }
734
735 /**
736 * Read a RTSP message from the server, or prepare to read data
737 * packets if we're reading data interleaved over the TCP/RTSP
738 * connection as well.
739 *
740 * @param s RTSP demuxer context
741 * @param reply pointer where the RTSP message header will be stored
742 * @param content_ptr pointer where the RTSP message body, if any, will
743 * be stored (length is in \p reply)
744 * @param return_on_interleaved_data whether the function may return if we
745 * encounter a data marker ('$'), which precedes data
746 * packets over interleaved TCP/RTSP connections. If this
747 * is set, this function will return 1 after encountering
748 * a '$'. If it is not set, the function will skip any
749 * data packets (if they are encountered), until a reply
750 * has been fully parsed. If no more data is available
751 * without parsing a reply, it will return an error.
752 *
753 * @returns 1 if a data packets is ready to be received, -1 on error,
754 * and 0 on success.
755 */
756 static int
757 rtsp_read_reply (AVFormatContext *s, RTSPMessageHeader *reply,
758 unsigned char **content_ptr, int return_on_interleaved_data)
759 {
760 RTSPState *rt = s->priv_data;
761 char buf[4096], buf1[1024], *q;
762 unsigned char ch;
763 const char *p;
764 int ret, content_length, line_count = 0;
765 unsigned char *content = NULL;
766
767 memset(reply, 0, sizeof(*reply));
768
769 /* parse reply (XXX: use buffers) */
770 rt->last_reply[0] = '\0';
771 for(;;) {
772 q = buf;
773 for(;;) {
774 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
775 #ifdef DEBUG_RTP_TCP
776 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
777 #endif
778 if (ret != 1)
779 return -1;
780 if (ch == '\n')
781 break;
782 if (ch == '$') {
783 /* XXX: only parse it if first char on line ? */
784 if (return_on_interleaved_data) {
785 return 1;
786 } else
787 rtsp_skip_packet(s);
788 } else if (ch != '\r') {
789 if ((q - buf) < sizeof(buf) - 1)
790 *q++ = ch;
791 }
792 }
793 *q = '\0';
794
795 dprintf(s, "line='%s'\n", buf);
796
797 /* test if last line */
798 if (buf[0] == '\0')
799 break;
800 p = buf;
801 if (line_count == 0) {
802 /* get reply code */
803 get_word(buf1, sizeof(buf1), &p);
804 get_word(buf1, sizeof(buf1), &p);
805 reply->status_code = atoi(buf1);
806 } else {
807 rtsp_parse_line(reply, p);
808 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
809 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
810 }
811 line_count++;
812 }
813
814 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
815 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
816
817 content_length = reply->content_length;
818 if (content_length > 0) {
819 /* leave some room for a trailing '\0' (useful for simple parsing) */
820 content = av_malloc(content_length + 1);
821 (void)url_read_complete(rt->rtsp_hd, content, content_length);
822 content[content_length] = '\0';
823 }
824 if (content_ptr)
825 *content_ptr = content;
826 else
827 av_free(content);
828
829 /* EOS */
830 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
831 reply->notice == 2104 /* Start-of-Stream Reached */ ||
832 reply->notice == 2306 /* Continuous Feed Terminated */)
833 rt->state = RTSP_STATE_IDLE;
834 else if (reply->notice >= 4400 && reply->notice < 5500)
835 return AVERROR(EIO); /* data or server error */
836 else if (reply->notice == 2401 /* Ticket Expired */ ||
837 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
838 return AVERROR(EPERM);
839
840 return 0;
841 }
842
843 static void rtsp_send_cmd_async (AVFormatContext *s,
844 const char *cmd, RTSPMessageHeader *reply,
845 unsigned char **content_ptr)
846 {
847 RTSPState *rt = s->priv_data;
848 char buf[4096], buf1[1024];
849
850 rt->seq++;
851 av_strlcpy(buf, cmd, sizeof(buf));
852 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
853 av_strlcat(buf, buf1, sizeof(buf));
854 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
855 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
856 av_strlcat(buf, buf1, sizeof(buf));
857 }
858 av_strlcat(buf, "\r\n", sizeof(buf));
859
860 dprintf(s, "Sending:\n%s--\n", buf);
861
862 url_write(rt->rtsp_hd, buf, strlen(buf));
863 rt->last_cmd_time = av_gettime();
864 }
865
866 static void rtsp_send_cmd (AVFormatContext *s,
867 const char *cmd, RTSPMessageHeader *reply,
868 unsigned char **content_ptr)
869 {
870 rtsp_send_cmd_async(s, cmd, reply, content_ptr);
871
872 rtsp_read_reply(s, reply, content_ptr, 0);
873 }
874
875
876 /* close and free RTSP streams */
877 static void rtsp_close_streams(RTSPState *rt)
878 {
879 int i;
880 RTSPStream *rtsp_st;
881
882 for(i=0;i<rt->nb_rtsp_streams;i++) {
883 rtsp_st = rt->rtsp_streams[i];
884 if (rtsp_st) {
885 if (rtsp_st->transport_priv) {
886 if (rt->transport == RTSP_TRANSPORT_RDT)
887 ff_rdt_parse_close(rtsp_st->transport_priv);
888 else
889 rtp_parse_close(rtsp_st->transport_priv);
890 }
891 if (rtsp_st->rtp_handle)
892 url_close(rtsp_st->rtp_handle);
893 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
894 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
895 }
896 }
897 av_free(rt->rtsp_streams);
898 if (rt->asf_ctx) {
899 av_close_input_stream (rt->asf_ctx);
900 rt->asf_ctx = NULL;
901 }
902 }
903
904 static int
905 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
906 {
907 RTSPState *rt = s->priv_data;
908 AVStream *st = NULL;
909
910 /* open the RTP context */
911 if (rtsp_st->stream_index >= 0)
912 st = s->streams[rtsp_st->stream_index];
913 if (!st)
914 s->ctx_flags |= AVFMTCTX_NOHEADER;
915
916 if (rt->transport == RTSP_TRANSPORT_RDT)
917 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
918 rtsp_st->dynamic_protocol_context,
919 rtsp_st->dynamic_handler);
920 else
921 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
922 rtsp_st->sdp_payload_type,
923 &rtsp_st->rtp_payload_data);
924
925 if (!rtsp_st->transport_priv) {
926 return AVERROR(ENOMEM);
927 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
928 if(rtsp_st->dynamic_handler) {
929 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
930 rtsp_st->dynamic_protocol_context,
931 rtsp_st->dynamic_handler);
932 }
933 }
934
935 return 0;
936 }
937
938 /**
939 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
940 */
941 static int
942 make_setup_request (AVFormatContext *s, const char *host, int port,
943 int lower_transport, const char *real_challenge)
944 {
945 RTSPState *rt = s->priv_data;
946 int rtx, j, i, err, interleave = 0;
947 RTSPStream *rtsp_st;
948 RTSPMessageHeader reply1, *reply = &reply1;
949 char cmd[2048];
950 const char *trans_pref;
951
952 if (rt->transport == RTSP_TRANSPORT_RDT)
953 trans_pref = "x-pn-tng";
954 else
955 trans_pref = "RTP/AVP";
956
957 /* default timeout: 1 minute */
958 rt->timeout = 60;
959
960 /* for each stream, make the setup request */
961 /* XXX: we assume the same server is used for the control of each
962 RTSP stream */
963
964 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
965 char transport[2048];
966
967 /**
968 * WMS serves all UDP data over a single connection, the RTX, which
969 * isn't necessarily the first in the SDP but has to be the first
970 * to be set up, else the second/third SETUP will fail with a 461.
971 */
972 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
973 rt->server_type == RTSP_SERVER_WMS) {
974 if (i == 0) {
975 /* rtx first */
976 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
977 int len = strlen(rt->rtsp_streams[rtx]->control_url);
978 if (len >= 4 &&
979 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4, "/rtx"))
980 break;
981 }
982 if (rtx == rt->nb_rtsp_streams)
983 return -1; /* no RTX found */
984 rtsp_st = rt->rtsp_streams[rtx];
985 } else
986 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
987 } else
988 rtsp_st = rt->rtsp_streams[i];
989
990 /* RTP/UDP */
991 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
992 char buf[256];
993
994 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
995 port = reply->transports[0].client_port_min;
996 goto have_port;
997 }
998
999 /* first try in specified port range */
1000 if (RTSP_RTP_PORT_MIN != 0) {
1001 while(j <= RTSP_RTP_PORT_MAX) {
1002 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
1003 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
1004 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
1005 goto rtp_opened;
1006 }
1007 }
1008 }
1009
1010 /* then try on any port
1011 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1012 ** err = AVERROR_INVALIDDATA;
1013 ** goto fail;
1014 ** }
1015 */
1016
1017 rtp_opened:
1018 port = rtp_get_local_port(rtsp_st->rtp_handle);
1019 have_port:
1020 snprintf(transport, sizeof(transport) - 1,
1021 "%s/UDP;", trans_pref);
1022 if (rt->server_type != RTSP_SERVER_REAL)
1023 av_strlcat(transport, "unicast;", sizeof(transport));
1024 av_strlcatf(transport, sizeof(transport),
1025 "client_port=%d", port);
1026 if (rt->transport == RTSP_TRANSPORT_RTP &&
1027 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1028 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1029 }
1030
1031 /* RTP/TCP */
1032 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1033 /** For WMS streams, the application streams are only used for
1034 * UDP. When trying to set it up for TCP streams, the server
1035 * will return an error. Therefore, we skip those streams. */
1036 if (rt->server_type == RTSP_SERVER_WMS &&
1037 s->streams[rtsp_st->stream_index]->codec->codec_type == CODEC_TYPE_DATA)
1038 continue;
1039 snprintf(transport, sizeof(transport) - 1,
1040 "%s/TCP;", trans_pref);
1041 if (rt->server_type == RTSP_SERVER_WMS)
1042 av_strlcat(transport, "unicast;", sizeof(transport));
1043 av_strlcatf(transport, sizeof(transport),
1044 "interleaved=%d-%d",
1045 interleave, interleave + 1);
1046 interleave += 2;
1047 }
1048
1049 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1050 snprintf(transport, sizeof(transport) - 1,
1051 "%s/UDP;multicast", trans_pref);
1052 }
1053 if (rt->server_type == RTSP_SERVER_REAL ||
1054 rt->server_type == RTSP_SERVER_WMS)
1055 av_strlcat(transport, ";mode=play", sizeof(transport));
1056 snprintf(cmd, sizeof(cmd),
1057 "SETUP %s RTSP/1.0\r\n"
1058 "Transport: %s\r\n",
1059 rtsp_st->control_url, transport);
1060 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1061 char real_res[41], real_csum[9];
1062 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1063 real_challenge);
1064 av_strlcatf(cmd, sizeof(cmd),
1065 "If-Match: %s\r\n"
1066 "RealChallenge2: %s, sd=%s\r\n",
1067 rt->session_id, real_res, real_csum);
1068 }
1069 rtsp_send_cmd(s, cmd, reply, NULL);
1070 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1071 err = 1;
1072 goto fail;
1073 } else if (reply->status_code != RTSP_STATUS_OK ||
1074 reply->nb_transports != 1) {
1075 err = AVERROR_INVALIDDATA;
1076 goto fail;
1077 }
1078
1079 /* XXX: same protocol for all streams is required */
1080 if (i > 0) {
1081 if (reply->transports[0].lower_transport != rt->lower_transport ||
1082 reply->transports[0].transport != rt->transport) {
1083 err = AVERROR_INVALIDDATA;
1084 goto fail;
1085 }
1086 } else {
1087 rt->lower_transport = reply->transports[0].lower_transport;
1088 rt->transport = reply->transports[0].transport;
1089 }
1090
1091 /* close RTP connection if not choosen */
1092 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1093 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1094 url_close(rtsp_st->rtp_handle);
1095 rtsp_st->rtp_handle = NULL;
1096 }
1097
1098 switch(reply->transports[0].lower_transport) {
1099 case RTSP_LOWER_TRANSPORT_TCP:
1100 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1101 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1102 break;
1103
1104 case RTSP_LOWER_TRANSPORT_UDP:
1105 {
1106 char url[1024];
1107
1108 /* XXX: also use address if specified */
1109 snprintf(url, sizeof(url), "rtp://%s:%d",
1110 host, reply->transports[0].server_port_min);
1111 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1112 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1113 err = AVERROR_INVALIDDATA;
1114 goto fail;
1115 }
1116 }
1117 break;
1118 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1119 {
1120 char url[1024];
1121 struct in_addr in;
1122
1123 in.s_addr = htonl(reply->transports[0].destination);
1124 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1125 inet_ntoa(in),
1126 reply->transports[0].port_min,
1127 reply->transports[0].ttl);
1128 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1129 err = AVERROR_INVALIDDATA;
1130 goto fail;
1131 }
1132 }
1133 break;
1134 }
1135
1136 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1137 goto fail;
1138 }
1139
1140 if (reply->timeout > 0)
1141 rt->timeout = reply->timeout;
1142
1143 if (rt->server_type == RTSP_SERVER_REAL)
1144 rt->need_subscription = 1;
1145
1146 return 0;
1147
1148 fail:
1149 for (i=0; i<rt->nb_rtsp_streams; i++) {
1150 if (rt->rtsp_streams[i]->rtp_handle) {
1151 url_close(rt->rtsp_streams[i]->rtp_handle);
1152 rt->rtsp_streams[i]->rtp_handle = NULL;
1153 }
1154 }
1155 return err;
1156 }
1157
1158 static int rtsp_read_header(AVFormatContext *s,
1159 AVFormatParameters *ap)
1160 {
1161 RTSPState *rt = s->priv_data;
1162 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1163 URLContext *rtsp_hd;
1164 int port, ret, err;
1165 RTSPMessageHeader reply1, *reply = &reply1;
1166 unsigned char *content = NULL;
1167 int lower_transport_mask = 0;
1168 char real_challenge[64];
1169
1170 /* extract hostname and port */
1171 url_split(NULL, 0, NULL, 0,
1172 host, sizeof(host), &port, path, sizeof(path), s->filename);
1173 if (port < 0)
1174 port = RTSP_DEFAULT_PORT;
1175
1176 /* search for options */
1177 option_list = strchr(path, '?');
1178 if (option_list) {
1179 /* remove the options from the path */
1180 *option_list++ = 0;
1181 while(option_list) {
1182 /* move the option pointer */
1183 option = option_list;
1184 option_list = strchr(option_list, '&');
1185 if (option_list)
1186 *(option_list++) = 0;
1187 /* handle the options */
1188 if (strcmp(option, "udp") == 0)
1189 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1190 else if (strcmp(option, "multicast") == 0)
1191 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1192 else if (strcmp(option, "tcp") == 0)
1193 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1194 }
1195 }
1196
1197 if (!lower_transport_mask)
1198 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1199
1200 /* open the tcp connexion */
1201 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1202 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1203 return AVERROR(EIO);
1204 rt->rtsp_hd = rtsp_hd;
1205 rt->seq = 0;
1206
1207 /* request options supported by the server; this also detects server type */
1208 for (rt->server_type = RTSP_SERVER_RTP;;) {
1209 snprintf(cmd, sizeof(cmd),
1210 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1211 if (rt->server_type == RTSP_SERVER_REAL)
1212 av_strlcat(cmd,
1213 /**
1214 * The following entries are required for proper
1215 * streaming from a Realmedia server. They are
1216 * interdependent in some way although we currently
1217 * don't quite understand how. Values were copied
1218 * from mplayer SVN r23589.
1219 * @param CompanyID is a 16-byte ID in base64
1220 * @param ClientChallenge is a 16-byte ID in hex
1221 */
1222 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1223 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1224 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1225 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1226 sizeof(cmd));
1227 rtsp_send_cmd(s, cmd, reply, NULL);
1228 if (reply->status_code != RTSP_STATUS_OK) {
1229 err = AVERROR_INVALIDDATA;
1230 goto fail;
1231 }
1232
1233 /* detect server type if not standard-compliant RTP */
1234 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1235 rt->server_type = RTSP_SERVER_REAL;
1236 continue;
1237 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1238 rt->server_type = RTSP_SERVER_WMS;
1239 } else if (rt->server_type == RTSP_SERVER_REAL) {
1240 strcpy(real_challenge, reply->real_challenge);
1241 }
1242 break;
1243 }
1244
1245 /* describe the stream */
1246 snprintf(cmd, sizeof(cmd),
1247 "DESCRIBE %s RTSP/1.0\r\n"
1248 "Accept: application/sdp\r\n",
1249 s->filename);
1250 if (rt->server_type == RTSP_SERVER_REAL) {
1251 /**
1252 * The Require: attribute is needed for proper streaming from
1253 * Realmedia servers.
1254 */
1255 av_strlcat(cmd,
1256 "Require: com.real.retain-entity-for-setup\r\n",
1257 sizeof(cmd));
1258 }
1259 rtsp_send_cmd(s, cmd, reply, &content);
1260 if (!content) {
1261 err = AVERROR_INVALIDDATA;
1262 goto fail;
1263 }
1264 if (reply->status_code != RTSP_STATUS_OK) {
1265 err = AVERROR_INVALIDDATA;
1266 goto fail;
1267 }
1268
1269 /* now we got the SDP description, we parse it */
1270 ret = sdp_parse(s, (const char *)content);
1271 av_freep(&content);
1272 if (ret < 0) {
1273 err = AVERROR_INVALIDDATA;
1274 goto fail;
1275 }
1276
1277 do {
1278 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1279
1280 err = make_setup_request(s, host, port, lower_transport,
1281 rt->server_type == RTSP_SERVER_REAL ?
1282 real_challenge : NULL);
1283 if (err < 0)
1284 goto fail;
1285 lower_transport_mask &= ~(1 << lower_transport);
1286 if (lower_transport_mask == 0 && err == 1) {
1287 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1288 goto fail;
1289 }
1290 } while (err);
1291
1292 rt->state = RTSP_STATE_IDLE;
1293 rt->seek_timestamp = 0; /* default is to start stream at position
1294 zero */
1295 if (ap->initial_pause) {
1296 /* do not start immediately */
1297 } else {
1298 if (rtsp_read_play(s) < 0) {
1299 err = AVERROR_INVALIDDATA;
1300 goto fail;
1301 }
1302 }
1303 return 0;
1304 fail:
1305 rtsp_close_streams(rt);
1306 av_freep(&content);
1307 url_close(rt->rtsp_hd);
1308 return err;
1309 }
1310
1311 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1312 uint8_t *buf, int buf_size)
1313 {
1314 RTSPState *rt = s->priv_data;
1315 int id, len, i, ret;
1316 RTSPStream *rtsp_st;
1317
1318 #ifdef DEBUG_RTP_TCP
1319 dprintf(s, "tcp_read_packet:\n");
1320 #endif
1321 redo:
1322 for(;;) {
1323 RTSPMessageHeader reply;
1324
1325 ret = rtsp_read_reply(s, &reply, NULL, 1);
1326 if (ret == -1)
1327 return -1;
1328 if (ret == 1) /* received '$' */
1329 break;
1330 /* XXX: parse message */
1331 if (rt->state != RTSP_STATE_PLAYING)
1332 return 0;
1333 }
1334 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1335 if (ret != 3)
1336 return -1;
1337 id = buf[0];
1338 len = AV_RB16(buf + 1);
1339 #ifdef DEBUG_RTP_TCP
1340 dprintf(s, "id=%d len=%d\n", id, len);
1341 #endif
1342 if (len > buf_size || len < 12)
1343 goto redo;
1344 /* get the data */
1345 ret = url_read_complete(rt->rtsp_hd, buf, len);
1346 if (ret != len)
1347 return -1;
1348 if (rt->transport == RTSP_TRANSPORT_RDT &&
1349 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1350 return -1;
1351
1352 /* find the matching stream */
1353 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1354 rtsp_st = rt->rtsp_streams[i];
1355 if (id >= rtsp_st->interleaved_min &&
1356 id <= rtsp_st->interleaved_max)
1357 goto found;
1358 }
1359 goto redo;
1360 found:
1361 *prtsp_st = rtsp_st;
1362 return len;
1363 }
1364
1365 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1366 uint8_t *buf, int buf_size)
1367 {
1368 RTSPState *rt = s->priv_data;
1369 RTSPStream *rtsp_st;
1370 fd_set rfds;
1371 int fd, fd_max, n, i, ret, tcp_fd;
1372 struct timeval tv;
1373
1374 for(;;) {
1375 if (url_interrupt_cb())
1376 return AVERROR(EINTR);
1377 FD_ZERO(&rfds);
1378 if (rt->rtsp_hd) {
1379 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1380 FD_SET(tcp_fd, &rfds);
1381 } else {
1382 fd_max = 0;
1383 tcp_fd = -1;
1384 }
1385 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1386 rtsp_st = rt->rtsp_streams[i];
1387 if (rtsp_st->rtp_handle) {
1388 /* currently, we cannot probe RTCP handle because of
1389 * blocking restrictions */
1390 fd = url_get_file_handle(rtsp_st->rtp_handle);
1391 if (fd > fd_max)
1392 fd_max = fd;
1393 FD_SET(fd, &rfds);
1394 }
1395 }
1396 tv.tv_sec = 0;
1397 tv.tv_usec = 100 * 1000;
1398 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1399 if (n > 0) {
1400 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1401 rtsp_st = rt->rtsp_streams[i];
1402 if (rtsp_st->rtp_handle) {
1403 fd = url_get_file_handle(rtsp_st->rtp_handle);
1404 if (FD_ISSET(fd, &rfds)) {
1405 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1406 if (ret > 0) {
1407 *prtsp_st = rtsp_st;
1408 return ret;
1409 }
1410 }
1411 }
1412 }
1413 if (FD_ISSET(tcp_fd, &rfds)) {
1414 RTSPMessageHeader reply;
1415
1416 rtsp_read_reply(s, &reply, NULL, 0);
1417 /* XXX: parse message */
1418 if (rt->state != RTSP_STATE_PLAYING)
1419 return 0;
1420 }
1421 }
1422 }
1423 }
1424
1425 static int rtsp_read_packet(AVFormatContext *s,
1426 AVPacket *pkt)
1427 {
1428 RTSPState *rt = s->priv_data;
1429 RTSPStream *rtsp_st;
1430 int ret, len;
1431 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1432 RTSPMessageHeader reply1, *reply = &reply1;
1433 char cmd[1024];
1434
1435 if (rt->server_type == RTSP_SERVER_REAL) {
1436 int i;
1437 enum AVDiscard cache[MAX_STREAMS];
1438
1439 for (i = 0; i < s->nb_streams; i++)
1440 cache[i] = s->streams[i]->discard;
1441
1442 if (!rt->need_subscription) {
1443 if (memcmp (cache, rt->real_setup_cache,
1444 sizeof(enum AVDiscard) * s->nb_streams)) {
1445 av_strlcatf(cmd, sizeof(cmd),
1446 "SET_PARAMETER %s RTSP/1.0\r\n"
1447 "Unsubscribe: %s\r\n",
1448 s->filename, rt->last_subscription);
1449 rtsp_send_cmd(s, cmd, reply, NULL);
1450 if (reply->status_code != RTSP_STATUS_OK)
1451 return AVERROR_INVALIDDATA;
1452 rt->need_subscription = 1;
1453 }
1454 }
1455
1456 if (rt->need_subscription) {
1457 int r, rule_nr, first = 1;
1458
1459 memcpy(rt->real_setup_cache, cache,
1460 sizeof(enum AVDiscard) * s->nb_streams);
1461 rt->last_subscription[0] = 0;
1462
1463 snprintf(cmd, sizeof(cmd),
1464 "SET_PARAMETER %s RTSP/1.0\r\n"
1465 "Subscribe: ",
1466 s->filename);
1467 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1468 rule_nr = 0;
1469 for (r = 0; r < s->nb_streams; r++) {
1470 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1471 if (s->streams[r]->discard != AVDISCARD_ALL) {
1472 if (!first)
1473 av_strlcat(rt->last_subscription, ",",
1474 sizeof(rt->last_subscription));
1475 ff_rdt_subscribe_rule(
1476 rt->last_subscription,
1477 sizeof(rt->last_subscription), i, rule_nr);
1478 first = 0;
1479 }
1480 rule_nr++;
1481 }
1482 }
1483 }
1484 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1485 rtsp_send_cmd(s, cmd, reply, NULL);
1486 if (reply->status_code != RTSP_STATUS_OK)
1487 return AVERROR_INVALIDDATA;
1488 rt->need_subscription = 0;
1489
1490 if (rt->state == RTSP_STATE_PLAYING)
1491 rtsp_read_play (s);
1492 }
1493 }
1494
1495 /* get next frames from the same RTP packet */
1496 if (rt->cur_transport_priv) {
1497 if (rt->transport == RTSP_TRANSPORT_RDT)
1498 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1499 else
1500 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1501 if (ret == 0) {
1502 rt->cur_transport_priv = NULL;
1503 return 0;
1504 } else if (ret == 1) {
1505 return 0;
1506 } else {
1507 rt->cur_transport_priv = NULL;
1508 }
1509 }
1510
1511 /* read next RTP packet */
1512 redo:
1513 switch(rt->lower_transport) {
1514 default:
1515 case RTSP_LOWER_TRANSPORT_TCP:
1516 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1517 break;
1518 case RTSP_LOWER_TRANSPORT_UDP:
1519 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1520 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1521 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1522 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1523 break;
1524 }
1525 if (len < 0)
1526 return len;
1527 if (len == 0)
1528 return AVERROR_EOF;
1529 if (rt->transport == RTSP_TRANSPORT_RDT)
1530 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1531 else
1532 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1533 if (ret < 0)
1534 goto redo;
1535 if (ret == 1) {
1536 /* more packets may follow, so we save the RTP context */
1537 rt->cur_transport_priv = rtsp_st->transport_priv;
1538 }
1539
1540 /* send dummy request to keep TCP connection alive */
1541 if ((rt->server_type == RTSP_SERVER_WMS ||
1542 rt->server_type == RTSP_SERVER_REAL) &&
1543 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1544 if (rt->server_type == RTSP_SERVER_WMS) {
1545 snprintf(cmd, sizeof(cmd) - 1,
1546 "GET_PARAMETER %s RTSP/1.0\r\n",
1547 s->filename);
1548 rtsp_send_cmd_async(s, cmd, reply, NULL);
1549 } else {
1550 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n",
1551 reply, NULL);
1552 }
1553 }
1554
1555 return 0;
1556 }
1557
1558 static int rtsp_read_play(AVFormatContext *s)
1559 {
1560 RTSPState *rt = s->priv_data;
1561 RTSPMessageHeader reply1, *reply = &reply1;
1562 char cmd[1024];
1563
1564 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1565
1566 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1567 if (rt->state == RTSP_STATE_PAUSED) {
1568 snprintf(cmd, sizeof(cmd),
1569 "PLAY %s RTSP/1.0\r\n",
1570 s->filename);
1571 } else {
1572 snprintf(cmd, sizeof(cmd),
1573 "PLAY %s RTSP/1.0\r\n"
1574 "Range: npt=%0.3f-\r\n",
1575 s->filename,
1576 (double)rt->seek_timestamp / AV_TIME_BASE);
1577 }
1578 rtsp_send_cmd(s, cmd, reply, NULL);
1579 if (reply->status_code != RTSP_STATUS_OK) {
1580 return -1;
1581 }
1582 }
1583 rt->state = RTSP_STATE_PLAYING;
1584 return 0;
1585 }
1586
1587 /* pause the stream */
1588 static int rtsp_read_pause(AVFormatContext *s)
1589 {
1590 RTSPState *rt = s->priv_data;
1591 RTSPMessageHeader reply1, *reply = &reply1;
1592 char cmd[1024];
1593
1594 rt = s->priv_data;
1595
1596 if (rt->state != RTSP_STATE_PLAYING)
1597 return 0;
1598 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1599 snprintf(cmd, sizeof(cmd),
1600 "PAUSE %s RTSP/1.0\r\n",
1601 s->filename);
1602 rtsp_send_cmd(s, cmd, reply, NULL);
1603 if (reply->status_code != RTSP_STATUS_OK) {
1604 return -1;
1605 }
1606 }
1607 rt->state = RTSP_STATE_PAUSED;
1608 return 0;
1609 }
1610
1611 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1612 int64_t timestamp, int flags)
1613 {
1614 RTSPState *rt = s->priv_data;
1615
1616 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1617 switch(rt->state) {
1618 default:
1619 case RTSP_STATE_IDLE:
1620 break;
1621 case RTSP_STATE_PLAYING:
1622 if (rtsp_read_pause(s) != 0)
1623 return -1;
1624 rt->state = RTSP_STATE_SEEKING;
1625 if (rtsp_read_play(s) != 0)
1626 return -1;
1627 break;
1628 case RTSP_STATE_PAUSED:
1629 rt->state = RTSP_STATE_IDLE;
1630 break;
1631 }
1632 return 0;
1633 }
1634
1635 static int rtsp_read_close(AVFormatContext *s)
1636 {
1637 RTSPState *rt = s->priv_data;
1638 RTSPMessageHeader reply1, *reply = &reply1;
1639 char cmd[1024];
1640
1641 #if 0
1642 /* NOTE: it is valid to flush the buffer here */
1643 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1644 url_fclose(&rt->rtsp_gb);
1645 }
1646 #endif
1647 snprintf(cmd, sizeof(cmd),
1648 "TEARDOWN %s RTSP/1.0\r\n",
1649 s->filename);
1650 rtsp_send_cmd(s, cmd, reply, NULL);
1651
1652 rtsp_close_streams(rt);
1653 url_close(rt->rtsp_hd);
1654 return 0;
1655 }
1656
1657 #if CONFIG_RTSP_DEMUXER
1658 AVInputFormat rtsp_demuxer = {
1659 "rtsp",
1660 NULL_IF_CONFIG_SMALL("RTSP input format"),
1661 sizeof(RTSPState),
1662 rtsp_probe,
1663 rtsp_read_header,
1664 rtsp_read_packet,
1665 rtsp_read_close,
1666 rtsp_read_seek,
1667 .flags = AVFMT_NOFILE,
1668 .read_play = rtsp_read_play,
1669 .read_pause = rtsp_read_pause,
1670 };
1671 #endif
1672
1673 static int sdp_probe(AVProbeData *p1)
1674 {
1675 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1676
1677 /* we look for a line beginning "c=IN IP4" */
1678 while (p < p_end && *p != '\0') {
1679 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1680 return AVPROBE_SCORE_MAX / 2;
1681
1682 while(p < p_end - 1 && *p != '\n') p++;
1683 if (++p >= p_end)
1684 break;
1685 if (*p == '\r')
1686 p++;
1687 }
1688 return 0;
1689 }
1690
1691 #define SDP_MAX_SIZE 8192
1692
1693 static int sdp_read_header(AVFormatContext *s,
1694 AVFormatParameters *ap)
1695 {
1696 RTSPState *rt = s->priv_data;
1697 RTSPStream *rtsp_st;
1698 int size, i, err;
1699 char *content;
1700 char url[1024];
1701
1702 /* read the whole sdp file */
1703 /* XXX: better loading */
1704 content = av_malloc(SDP_MAX_SIZE);
1705 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1706 if (size <= 0) {
1707 av_free(content);
1708 return AVERROR_INVALIDDATA;
1709 }
1710 content[size] ='\0';
1711
1712 sdp_parse(s, content);
1713 av_free(content);
1714
1715 /* open each RTP stream */
1716 for(i=0;i<rt->nb_rtsp_streams;i++) {
1717 rtsp_st = rt->rtsp_streams[i];
1718
1719 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1720 inet_ntoa(rtsp_st->sdp_ip),
1721 rtsp_st->sdp_port,
1722 rtsp_st->sdp_port,
1723 rtsp_st->sdp_ttl);
1724 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1725 err = AVERROR_INVALIDDATA;
1726 goto fail;
1727 }
1728 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1729 goto fail;
1730 }
1731 return 0;
1732 fail:
1733 rtsp_close_streams(rt);
1734 return err;
1735 }
1736
1737 static int sdp_read_packet(AVFormatContext *s,
1738 AVPacket *pkt)
1739 {
1740 return rtsp_read_packet(s, pkt);
1741 }
1742
1743 static int sdp_read_close(AVFormatContext *s)
1744 {
1745 RTSPState *rt = s->priv_data;
1746 rtsp_close_streams(rt);
1747 return 0;
1748 }
1749
1750 #if CONFIG_SDP_DEMUXER
1751 AVInputFormat sdp_demuxer = {
1752 "sdp",
1753 NULL_IF_CONFIG_SMALL("SDP"),
1754 sizeof(RTSPState),
1755 sdp_probe,
1756 sdp_read_header,
1757 sdp_read_packet,
1758 sdp_read_close,
1759 };
1760 #endif
1761
1762 #if CONFIG_REDIR_DEMUXER
1763 /* dummy redirector format (used directly in av_open_input_file now) */
1764 static int redir_probe(AVProbeData *pd)
1765 {
1766 const char *p;
1767 p = pd->buf;
1768 skip_spaces(&p);
1769 if (av_strstart(p, "http://", NULL) ||
1770 av_strstart(p, "rtsp://", NULL))
1771 return AVPROBE_SCORE_MAX;
1772 return 0;
1773 }
1774
1775 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1776 {
1777 char buf[4096], *q;
1778 int c;
1779 AVFormatContext *ic = NULL;
1780 ByteIOContext *f = s->pb;
1781
1782 /* parse each URL and try to open it */
1783 c = url_fgetc(f);
1784 while (c != URL_EOF) {
1785 /* skip spaces */
1786 for(;;) {
1787 if (!redir_isspace(c))
1788 break;
1789 c = url_fgetc(f);
1790 }
1791 if (c == URL_EOF)
1792 break;
1793 /* record url */
1794 q = buf;
1795 for(;;) {
1796 if (c == URL_EOF || redir_isspace(c))
1797 break;
1798 if ((q - buf) < sizeof(buf) - 1)
1799 *q++ = c;
1800 c = url_fgetc(f);
1801 }
1802 *q = '\0';
1803 //printf("URL='%s'\n", buf);
1804 /* try to open the media file */
1805 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1806 break;
1807 }
1808 if (!ic)
1809 return AVERROR(EIO);
1810
1811 *s = *ic;
1812 url_fclose(f);
1813
1814 return 0;
1815 }
1816
1817 AVInputFormat redir_demuxer = {
1818 "redir",
1819 NULL_IF_CONFIG_SMALL("Redirector format"),
1820 0,
1821 redir_probe,
1822 redir_read_header,
1823 NULL,
1824 NULL,
1825 };
1826 #endif
ffmpeg with support for matroska ordered chapters