Use full internal pathname in doxygen @file directives.
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
406792e7 3 * Copyright (c) 2002 Fabrice Bellard
1617ad97 4 *
b78e7197
DB
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
1617ad97
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
7246177d
AJ
22/* needed by inet_aton() */
23#define _SVID_SOURCE
24
245976da 25#include "libavutil/avstring.h"
6a5d31ac 26#include "libavutil/intreadwrite.h"
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27#include "avformat.h"
28
db0ed93e 29#include <sys/time.h>
b250f9c6 30#if HAVE_SYS_SELECT_H
933bd8e2 31#include <sys/select.h>
6ad1c9c9 32#endif
ea452b54 33#include <strings.h>
42572ef5 34#include "network.h"
c971ff19 35#include "rtsp.h"
1617ad97 36
20631a9c 37#include "rtp.h"
e9dea59f 38#include "rdt.h"
4934884a 39
1617ad97 40//#define DEBUG
b6892136 41//#define DEBUG_RTP_TCP
1617ad97 42
ff762d6e
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43static int rtsp_read_play(AVFormatContext *s);
44
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45/* XXX: currently, the only way to change the protocols consists in
46 changing this variable */
1617ad97 47
c482500f 48#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 49int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 50#endif
85fb7b34 51
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52static int rtsp_probe(AVProbeData *p)
53{
f7d78f36 54 if (av_strstart(p->filename, "rtsp:", NULL))
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55 return AVPROBE_SCORE_MAX;
56 return 0;
57}
58
59static int redir_isspace(int c)
60{
ccd425e7 61 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
1617ad97
FB
62}
63
64static void skip_spaces(const char **pp)
65{
66 const char *p;
67 p = *pp;
68 while (redir_isspace(*p))
69 p++;
70 *pp = p;
71}
72
115329f1 73static void get_word_sep(char *buf, int buf_size, const char *sep,
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74 const char **pp)
75{
76 const char *p;
77 char *q;
78
79 p = *pp;
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80 if (*p == '/')
81 p++;
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82 skip_spaces(&p);
83 q = buf;
84 while (!strchr(sep, *p) && *p != '\0') {
85 if ((q - buf) < buf_size - 1)
86 *q++ = *p;
87 p++;
88 }
89 if (buf_size > 0)
90 *q = '\0';
91 *pp = p;
92}
93
94static void get_word(char *buf, int buf_size, const char **pp)
95{
96 const char *p;
97 char *q;
98
99 p = *pp;
100 skip_spaces(&p);
101 q = buf;
102 while (!redir_isspace(*p) && *p != '\0') {
103 if ((q - buf) < buf_size - 1)
104 *q++ = *p;
105 p++;
106 }
107 if (buf_size > 0)
108 *q = '\0';
109 *pp = p;
110}
111
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112/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
113 params>] */
4934884a 114static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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115{
116 char buf[256];
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117 int i;
118 AVCodec *c;
7b49ce2e 119 const char *c_name;
93ced3e8 120
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121 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
122 see if we can handle this kind of payload */
93ced3e8 123 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 124 if (payload_type >= RTP_PT_PRIVATE) {
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125 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
126 while(handler) {
127 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
128 codec->codec_id = handler->codec_id;
129 rtsp_st->dynamic_handler= handler;
130 if(handler->open) {
131 rtsp_st->dynamic_protocol_context= handler->open();
132 }
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133 break;
134 }
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135 handler= handler->next;
136 }
93ced3e8 137 } else {
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138 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
139 /* search into AVRtpPayloadTypes[] */
7ed19d7f 140 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
141 }
142
143 c = avcodec_find_decoder(codec->codec_id);
144 if (c && c->name)
7b49ce2e 145 c_name = c->name;
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RD
146 else
147 c_name = (char *)NULL;
148
149 if (c_name) {
150 get_word_sep(buf, sizeof(buf), "/", &p);
151 i = atoi(buf);
152 switch (codec->codec_type) {
153 case CODEC_TYPE_AUDIO:
154 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
155 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
156 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
157 if (i > 0) {
158 codec->sample_rate = i;
159 get_word_sep(buf, sizeof(buf), "/", &p);
160 i = atoi(buf);
161 if (i > 0)
162 codec->channels = i;
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163 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
164 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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RD
165 }
166 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
167 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
168 break;
169 case CODEC_TYPE_VIDEO:
170 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
171 break;
172 default:
173 break;
174 }
175 return 0;
93ced3e8 176 }
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177
178 return -1;
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179}
180
181/* return the length and optionnaly the data */
182static int hex_to_data(uint8_t *data, const char *p)
183{
184 int c, len, v;
185
186 len = 0;
187 v = 1;
188 for(;;) {
189 skip_spaces(&p);
190 if (p == '\0')
191 break;
192 c = toupper((unsigned char)*p++);
193 if (c >= '0' && c <= '9')
194 c = c - '0';
195 else if (c >= 'A' && c <= 'F')
196 c = c - 'A' + 10;
197 else
198 break;
199 v = (v << 4) | c;
200 if (v & 0x100) {
201 if (data)
202 data[len] = v;
203 len++;
204 v = 1;
205 }
206 }
207 return len;
208}
209
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RD
210static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
211{
212 switch (codec->codec_id) {
213 case CODEC_ID_MPEG4:
cbee7a69 214 case CODEC_ID_AAC:
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RD
215 if (!strcmp(attr, "config")) {
216 /* decode the hexa encoded parameter */
217 int len = hex_to_data(NULL, value);
218 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
219 if (!codec->extradata)
220 return;
221 codec->extradata_size = len;
222 hex_to_data(codec->extradata, value);
223 }
224 break;
225 default:
226 break;
227 }
228 return;
229}
230
644e7acb 231typedef struct {
7b49ce2e 232 const char *str;
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233 uint16_t type;
234 uint32_t offset;
644e7acb 235} AttrNameMap;
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236
237/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
238#define ATTR_NAME_TYPE_INT 0
239#define ATTR_NAME_TYPE_STR 1
644e7acb 240static const AttrNameMap attr_names[]=
d1ccf0e0 241{
be73a544
LA
242 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
243 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
244 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
245 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
246 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
247 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
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RD
248 {NULL, -1, -1},
249};
250
d0deedcb
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251/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
252* because it is used in rtp_h264.c, which is forthcoming.
253*/
254int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
255{
256 skip_spaces(p);
257 if(**p)
258 {
259 get_word_sep(attr, attr_size, "=", p);
260 if (**p == '=')
261 (*p)++;
262 get_word_sep(value, value_size, ";", p);
263 if (**p == ';')
264 (*p)++;
265 return 1;
266 }
267 return 0;
268}
269
d1ccf0e0
RD
270/* parse a SDP line and save stream attributes */
271static void sdp_parse_fmtp(AVStream *st, const char *p)
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272{
273 char attr[256];
274 char value[4096];
d1ccf0e0
RD
275 int i;
276
277 RTSPStream *rtsp_st = st->priv_data;
01f4895c 278 AVCodecContext *codec = st->codec;
be73a544 279 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
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280
281 /* loop on each attribute */
1ad20f96
RM
282 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
283 {
bb270c08 284 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
285 sdp_parse_fmtp_config(codec, attr, value);
286 /* Looking for a known attribute */
287 for (i = 0; attr_names[i].str; ++i) {
288 if (!strcasecmp(attr, attr_names[i].str)) {
289 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
290 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
291 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
292 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 293 }
93ced3e8 294 }
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FB
295 }
296}
297
31693e00
RM
298/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
299 * and end time.
300 * Used for seeking in the rtp stream.
301 */
302static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
303{
304 char buf[256];
305
306 skip_spaces(&p);
f7d78f36 307 if (!av_stristart(p, "npt=", &p))
31693e00
RM
308 return;
309
310 *start = AV_NOPTS_VALUE;
311 *end = AV_NOPTS_VALUE;
312
313 get_word_sep(buf, sizeof(buf), "-", &p);
314 *start = parse_date(buf, 1);
315 if (*p == '-') {
316 p++;
317 get_word_sep(buf, sizeof(buf), "-", &p);
318 *end = parse_date(buf, 1);
319 }
320// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
321// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
322}
323
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FB
324typedef struct SDPParseState {
325 /* SDP only */
326 struct in_addr default_ip;
327 int default_ttl;
cb760a47 328 int skip_media; ///< set if an unknown m= line occurs
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FB
329} SDPParseState;
330
331static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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332 int letter, const char *buf)
333{
8b1ab7bf 334 RTSPState *rt = s->priv_data;
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335 char buf1[64], st_type[64];
336 const char *p;
fb65d2ca
DP
337 enum CodecType codec_type;
338 int payload_type, i;
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339 AVStream *st;
340 RTSPStream *rtsp_st;
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341 struct in_addr sdp_ip;
342 int ttl;
343
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344#ifdef DEBUG
345 printf("sdp: %c='%s'\n", letter, buf);
346#endif
347
348 p = buf;
cb760a47
RB
349 if (s1->skip_media && letter != 'm')
350 return;
1617ad97 351 switch(letter) {
93ced3e8
FB
352 case 'c':
353 get_word(buf1, sizeof(buf1), &p);
354 if (strcmp(buf1, "IN") != 0)
355 return;
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IP4") != 0)
358 return;
359 get_word_sep(buf1, sizeof(buf1), "/", &p);
360 if (inet_aton(buf1, &sdp_ip) == 0)
361 return;
362 ttl = 16;
363 if (*p == '/') {
364 p++;
365 get_word_sep(buf1, sizeof(buf1), "/", &p);
366 ttl = atoi(buf1);
367 }
368 if (s->nb_streams == 0) {
369 s1->default_ip = sdp_ip;
370 s1->default_ttl = ttl;
371 } else {
372 st = s->streams[s->nb_streams - 1];
373 rtsp_st = st->priv_data;
374 rtsp_st->sdp_ip = sdp_ip;
375 rtsp_st->sdp_ttl = ttl;
376 }
377 break;
1617ad97 378 case 's':
75e61b0e 379 av_strlcpy(s->title, p, sizeof(s->title));
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380 break;
381 case 'i':
382 if (s->nb_streams == 0) {
75e61b0e 383 av_strlcpy(s->comment, p, sizeof(s->comment));
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384 break;
385 }
386 break;
387 case 'm':
388 /* new stream */
cb760a47 389 s1->skip_media = 0;
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390 get_word(st_type, sizeof(st_type), &p);
391 if (!strcmp(st_type, "audio")) {
392 codec_type = CODEC_TYPE_AUDIO;
393 } else if (!strcmp(st_type, "video")) {
394 codec_type = CODEC_TYPE_VIDEO;
395 } else {
cb760a47 396 s1->skip_media = 1;
1617ad97
FB
397 return;
398 }
1617ad97
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399 rtsp_st = av_mallocz(sizeof(RTSPStream));
400 if (!rtsp_st)
401 return;
8b1ab7bf
FB
402 rtsp_st->stream_index = -1;
403 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
404
405 rtsp_st->sdp_ip = s1->default_ip;
406 rtsp_st->sdp_ttl = s1->default_ttl;
407
93ced3e8
FB
408 get_word(buf1, sizeof(buf1), &p); /* port */
409 rtsp_st->sdp_port = atoi(buf1);
410
411 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 412
93ced3e8
FB
413 /* XXX: handle list of formats */
414 get_word(buf1, sizeof(buf1), &p); /* format list */
415 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 416
7ed19d7f 417 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
418 /* no corresponding stream */
419 } else {
420 st = av_new_stream(s, 0);
421 if (!st)
422 return;
423 st->priv_data = rtsp_st;
424 rtsp_st->stream_index = st->index;
01f4895c 425 st->codec->codec_type = codec_type;
d1ccf0e0 426 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 427 /* if standard payload type, we can find the codec right now */
01f4895c 428 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
429 }
430 }
1617ad97 431 /* put a default control url */
75e61b0e 432 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1617ad97
FB
433 break;
434 case 'a':
f7d78f36 435 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
1617ad97
FB
436 char proto[32];
437 /* get the control url */
438 st = s->streams[s->nb_streams - 1];
439 rtsp_st = st->priv_data;
115329f1 440
1617ad97 441 /* XXX: may need to add full url resolution */
6ba5cbc6 442 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
443 if (proto[0] == '\0') {
444 /* relative control URL */
75e61b0e
MR
445 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
446 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 447 } else {
75e61b0e 448 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 449 }
83d14c85 450 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 451 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 452 get_word(buf1, sizeof(buf1), &p);
93ced3e8 453 payload_type = atoi(buf1);
83d14c85 454 st = s->streams[s->nb_streams - 1];
ff16f551
RB
455 rtsp_st = st->priv_data;
456 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
f7d78f36 457 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 458 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 459 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
460 payload_type = atoi(buf1);
461 for(i = 0; i < s->nb_streams;i++) {
462 st = s->streams[i];
463 rtsp_st = st->priv_data;
464 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 465 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 466 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
4934884a
RM
467 sdp_parse_fmtp(st, p);
468 }
469 } else {
ed787542 470 sdp_parse_fmtp(st, p);
4934884a 471 }
93ced3e8
FB
472 }
473 }
f7d78f36 474 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
475 // let dynamic protocol handlers have a stab at the line.
476 get_word(buf1, sizeof(buf1), &p);
477 payload_type = atoi(buf1);
478 for(i = 0; i < s->nb_streams;i++) {
479 st = s->streams[i];
480 rtsp_st = st->priv_data;
481 if (rtsp_st->sdp_payload_type == payload_type) {
482 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 483 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
d0deedcb
RM
484 }
485 }
486 }
f7d78f36 487 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
488 int64_t start, end;
489
490 // this is so that seeking on a streamed file can work.
491 rtsp_parse_range_npt(p, &start, &end);
492 s->start_time= start;
493 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
119b4668
RB
494 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
495 if (atoi(p) == 1)
496 rt->transport = RTSP_TRANSPORT_RDT;
8646b907 497 } else if (s->nb_streams > 0) {
3ca45429
RB
498 if (rt->server_type == RTSP_SERVER_REAL)
499 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
500
8646b907
RB
501 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
502 if (rtsp_st->dynamic_handler &&
503 rtsp_st->dynamic_handler->parse_sdp_a_line)
7b2a0708 504 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
8646b907 505 rtsp_st->dynamic_protocol_context, buf);
1617ad97
FB
506 }
507 break;
508 }
509}
510
5c91a675 511static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
512{
513 const char *p;
514 int letter;
9211bcdd
RB
515 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
516 * contain long SDP lines containing complete ASF Headers (several
517 * kB) or arrays of MDPR (RM stream descriptor) headers plus
518 * "rulebooks" describing their properties. Therefore, the SDP line
519 * buffer is large. */
e322d3f5 520 char buf[8192], *q;
93ced3e8 521 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 522
93ced3e8 523 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
524 p = content;
525 for(;;) {
526 skip_spaces(&p);
527 letter = *p;
528 if (letter == '\0')
529 break;
530 p++;
531 if (*p != '=')
532 goto next_line;
533 p++;
534 /* get the content */
535 q = buf;
b6892136 536 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
537 if ((q - buf) < sizeof(buf) - 1)
538 *q++ = *p;
539 p++;
540 }
541 *q = '\0';
93ced3e8 542 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
543 next_line:
544 while (*p != '\n' && *p != '\0')
545 p++;
546 if (*p == '\n')
547 p++;
548 }
549 return 0;
550}
551
552static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
553{
554 const char *p;
555 int v;
556
557 p = *pp;
558 skip_spaces(&p);
559 v = strtol(p, (char **)&p, 10);
560 if (*p == '-') {
561 p++;
562 *min_ptr = v;
563 v = strtol(p, (char **)&p, 10);
564 *max_ptr = v;
565 } else {
566 *min_ptr = v;
567 *max_ptr = v;
568 }
569 *pp = p;
570}
571
572/* XXX: only one transport specification is parsed */
573static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
574{
575 char transport_protocol[16];
576 char profile[16];
577 char lower_transport[16];
578 char parameter[16];
579 RTSPTransportField *th;
580 char buf[256];
115329f1 581
1617ad97 582 reply->nb_transports = 0;
115329f1 583
1617ad97
FB
584 for(;;) {
585 skip_spaces(&p);
586 if (*p == '\0')
587 break;
588
589 th = &reply->transports[reply->nb_transports];
590
115329f1 591 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
592 "/", &p);
593 if (*p == '/')
594 p++;
e1502118 595 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
596 get_word_sep(profile, sizeof(profile), "/;,", &p);
597 lower_transport[0] = '\0';
598 /* rtp/avp/<protocol> */
599 if (*p == '/') {
600 p++;
601 get_word_sep(lower_transport, sizeof(lower_transport),
602 ";,", &p);
119b4668
RB
603 }
604 th->transport = RTSP_TRANSPORT_RTP;
605 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
606 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 607 /* x-pn-tng/<protocol> */
e1502118
LB
608 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
609 profile[0] = '\0';
119b4668 610 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 611 }
b6892136 612 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 613 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 614 else
90abbdba 615 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 616
1617ad97
FB
617 if (*p == ';')
618 p++;
619 /* get each parameter */
620 while (*p != '\0' && *p != ',') {
621 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
622 if (!strcmp(parameter, "port")) {
623 if (*p == '=') {
624 p++;
625 rtsp_parse_range(&th->port_min, &th->port_max, &p);
626 }
627 } else if (!strcmp(parameter, "client_port")) {
628 if (*p == '=') {
629 p++;
115329f1 630 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
631 &th->client_port_max, &p);
632 }
633 } else if (!strcmp(parameter, "server_port")) {
634 if (*p == '=') {
635 p++;
115329f1 636 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
637 &th->server_port_max, &p);
638 }
639 } else if (!strcmp(parameter, "interleaved")) {
640 if (*p == '=') {
641 p++;
115329f1 642 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
643 &th->interleaved_max, &p);
644 }
645 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
646 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
647 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
648 } else if (!strcmp(parameter, "ttl")) {
649 if (*p == '=') {
650 p++;
651 th->ttl = strtol(p, (char **)&p, 10);
652 }
653 } else if (!strcmp(parameter, "destination")) {
654 struct in_addr ipaddr;
655
656 if (*p == '=') {
657 p++;
658 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 659 if (inet_aton(buf, &ipaddr))
1617ad97
FB
660 th->destination = ntohl(ipaddr.s_addr);
661 }
662 }
663 while (*p != ';' && *p != '\0' && *p != ',')
664 p++;
665 if (*p == ';')
666 p++;
667 }
668 if (*p == ',')
669 p++;
670
671 reply->nb_transports++;
672 }
673}
674
675void rtsp_parse_line(RTSPHeader *reply, const char *buf)
676{
677 const char *p;
678
679 /* NOTE: we do case independent match for broken servers */
680 p = buf;
f7d78f36 681 if (av_stristart(p, "Session:", &p)) {
1617ad97 682 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 683 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 684 reply->content_length = strtol(p, NULL, 10);
f7d78f36 685 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 686 rtsp_parse_transport(reply, p);
f7d78f36 687 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 688 reply->seq = strtol(p, NULL, 10);
f7d78f36 689 } else if (av_stristart(p, "Range:", &p)) {
31693e00 690 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
691 } else if (av_stristart(p, "RealChallenge1:", &p)) {
692 skip_spaces(&p);
693 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
694 } else if (av_stristart(p, "Server:", &p)) {
695 skip_spaces(&p);
696 av_strlcpy(reply->server, p, sizeof(reply->server));
1617ad97
FB
697 }
698}
699
2a42b5c3
LS
700static int url_readbuf(URLContext *h, unsigned char *buf, int size)
701{
702 int ret, len;
703
704 len = 0;
705 while (len < size) {
706 ret = url_read(h, buf+len, size-len);
707 if (ret < 1)
708 return ret;
709 len += ret;
710 }
711 return len;
712}
713
b7b8fc34
FB
714/* skip a RTP/TCP interleaved packet */
715static void rtsp_skip_packet(AVFormatContext *s)
716{
717 RTSPState *rt = s->priv_data;
718 int ret, len, len1;
719 uint8_t buf[1024];
720
2a42b5c3 721 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
722 if (ret != 3)
723 return;
80fb8234 724 len = AV_RB16(buf + 1);
b7b8fc34
FB
725#ifdef DEBUG
726 printf("skipping RTP packet len=%d\n", len);
727#endif
728 /* skip payload */
729 while (len > 0) {
730 len1 = len;
731 if (len1 > sizeof(buf))
732 len1 = sizeof(buf);
2a42b5c3 733 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
734 if (ret != len1)
735 return;
736 len -= len1;
737 }
738}
1617ad97 739
115329f1
DB
740static void rtsp_send_cmd(AVFormatContext *s,
741 const char *cmd, RTSPHeader *reply,
1617ad97
FB
742 unsigned char **content_ptr)
743{
744 RTSPState *rt = s->priv_data;
745 char buf[4096], buf1[1024], *q;
746 unsigned char ch;
747 const char *p;
748 int content_length, line_count;
749 unsigned char *content = NULL;
750
751 memset(reply, 0, sizeof(RTSPHeader));
752
753 rt->seq++;
75e61b0e 754 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 755 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 756 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 757 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 758 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 759 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 760 }
75e61b0e 761 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
762#ifdef DEBUG
763 printf("Sending:\n%s--\n", buf);
764#endif
765 url_write(rt->rtsp_hd, buf, strlen(buf));
766
767 /* parse reply (XXX: use buffers) */
768 line_count = 0;
769 rt->last_reply[0] = '\0';
770 for(;;) {
771 q = buf;
772 for(;;) {
2a42b5c3 773 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
774 break;
775 if (ch == '\n')
776 break;
b7b8fc34
FB
777 if (ch == '$') {
778 /* XXX: only parse it if first char on line ? */
779 rtsp_skip_packet(s);
780 } else if (ch != '\r') {
1617ad97
FB
781 if ((q - buf) < sizeof(buf) - 1)
782 *q++ = ch;
783 }
784 }
785 *q = '\0';
786#ifdef DEBUG
787 printf("line='%s'\n", buf);
788#endif
789 /* test if last line */
790 if (buf[0] == '\0')
791 break;
792 p = buf;
793 if (line_count == 0) {
794 /* get reply code */
795 get_word(buf1, sizeof(buf1), &p);
796 get_word(buf1, sizeof(buf1), &p);
797 reply->status_code = atoi(buf1);
798 } else {
799 rtsp_parse_line(reply, p);
75e61b0e
MR
800 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
801 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
802 }
803 line_count++;
804 }
115329f1 805
1617ad97 806 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 807 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 808
1617ad97
FB
809 content_length = reply->content_length;
810 if (content_length > 0) {
811 /* leave some room for a trailing '\0' (useful for simple parsing) */
812 content = av_malloc(content_length + 1);
2a42b5c3 813 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
814 content[content_length] = '\0';
815 }
816 if (content_ptr)
817 *content_ptr = content;
e2e2e7dd
AB
818 else
819 av_free(content);
1617ad97
FB
820}
821
1617ad97 822
8b1ab7bf
FB
823/* close and free RTSP streams */
824static void rtsp_close_streams(RTSPState *rt)
825{
826 int i;
827 RTSPStream *rtsp_st;
828
829 for(i=0;i<rt->nb_rtsp_streams;i++) {
830 rtsp_st = rt->rtsp_streams[i];
831 if (rtsp_st) {
accc248f
RB
832 if (rtsp_st->tx_ctx) {
833 if (rt->transport == RTSP_TRANSPORT_RDT)
834 ff_rdt_parse_close(rtsp_st->tx_ctx);
835 else
5c918b27 836 rtp_parse_close(rtsp_st->tx_ctx);
accc248f 837 }
8b1ab7bf
FB
838 if (rtsp_st->rtp_handle)
839 url_close(rtsp_st->rtp_handle);
4934884a
RM
840 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
841 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 842 }
8b1ab7bf
FB
843 }
844 av_free(rt->rtsp_streams);
845}
846
ee0cb67f
RB
847static int
848rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
849{
accc248f 850 RTSPState *rt = s->priv_data;
ee0cb67f
RB
851 AVStream *st = NULL;
852
a6789dca
RB
853 /* open the RTP context */
854 if (rtsp_st->stream_index >= 0)
855 st = s->streams[rtsp_st->stream_index];
856 if (!st)
857 s->ctx_flags |= AVFMTCTX_NOHEADER;
accc248f
RB
858
859 if (rt->transport == RTSP_TRANSPORT_RDT)
e0d1eabf 860 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
accc248f
RB
861 rtsp_st->dynamic_protocol_context,
862 rtsp_st->dynamic_handler);
863 else
5c918b27
RB
864 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
865 rtsp_st->sdp_payload_type,
866 &rtsp_st->rtp_payload_data);
a6789dca 867
5465b0d4 868 if (!rtsp_st->tx_ctx) {
a6789dca 869 return AVERROR(ENOMEM);
accc248f 870 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
a6789dca 871 if(rtsp_st->dynamic_handler) {
5465b0d4 872 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
99a1d191
RB
873 rtsp_st->dynamic_protocol_context,
874 rtsp_st->dynamic_handler);
ee0cb67f 875 }
a6789dca 876 }
ee0cb67f
RB
877
878 return 0;
879}
880
53620bba
RB
881/**
882 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
883 */
884static int
e9dea59f 885make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 886 int lower_transport, const char *real_challenge)
1617ad97
FB
887{
888 RTSPState *rt = s->priv_data;
53620bba 889 int j, i, err;
1617ad97 890 RTSPStream *rtsp_st;
53620bba
RB
891 RTSPHeader reply1, *reply = &reply1;
892 char cmd[2048];
e9dea59f
RB
893 const char *trans_pref;
894
119b4668 895 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
896 trans_pref = "x-pn-tng";
897 else
898 trans_pref = "RTP/AVP";
115329f1 899
1617ad97
FB
900 /* for each stream, make the setup request */
901 /* XXX: we assume the same server is used for the control of each
902 RTSP stream */
d1ccf0e0
RD
903
904 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
905 char transport[2048];
906
8b1ab7bf 907 rtsp_st = rt->rtsp_streams[i];
1617ad97 908
1617ad97 909 /* RTP/UDP */
90abbdba 910 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 911 char buf[256];
85fb7b34
FB
912
913 /* first try in specified port range */
d1ccf0e0
RD
914 if (RTSP_RTP_PORT_MIN != 0) {
915 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 916 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 917 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 918 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 919 goto rtp_opened;
d1ccf0e0 920 }
85fb7b34 921 }
1617ad97 922 }
85fb7b34 923
d1ccf0e0
RD
924/* then try on any port
925** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
926** err = AVERROR_INVALIDDATA;
927** goto fail;
928** }
929*/
85fb7b34
FB
930
931 rtp_opened:
8b1ab7bf 932 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 933 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
934 "%s/UDP;", trans_pref);
935 if (rt->server_type != RTSP_SERVER_REAL)
936 av_strlcat(transport, "unicast;", sizeof(transport));
937 av_strlcatf(transport, sizeof(transport),
938 "client_port=%d", port);
119b4668 939 if (rt->transport == RTSP_TRANSPORT_RTP)
e9dea59f 940 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
941 }
942
943 /* RTP/TCP */
90abbdba 944 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
0ad306bc 945 snprintf(transport, sizeof(transport) - 1,
e9dea59f 946 "%s/TCP", trans_pref);
1617ad97
FB
947 }
948
90abbdba 949 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 950 snprintf(transport, sizeof(transport) - 1,
e9dea59f 951 "%s/UDP;multicast", trans_pref);
1617ad97 952 }
2e889ae4 953 if (rt->server_type == RTSP_SERVER_REAL)
e9dea59f 954 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 955 snprintf(cmd, sizeof(cmd),
b6892136
FB
956 "SETUP %s RTSP/1.0\r\n"
957 "Transport: %s\r\n",
1617ad97 958 rtsp_st->control_url, transport);
2e889ae4 959 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
960 char real_res[41], real_csum[9];
961 ff_rdt_calc_response_and_checksum(real_res, real_csum,
962 real_challenge);
963 av_strlcatf(cmd, sizeof(cmd),
964 "If-Match: %s\r\n"
965 "RealChallenge2: %s, sd=%s\r\n",
966 rt->session_id, real_res, real_csum);
967 }
1617ad97 968 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
969 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
970 err = 1;
971 goto fail;
7e6ca34f
RB
972 } else if (reply->status_code != RTSP_STATUS_OK ||
973 reply->nb_transports != 1) {
1617ad97
FB
974 err = AVERROR_INVALIDDATA;
975 goto fail;
976 }
977
978 /* XXX: same protocol for all streams is required */
979 if (i > 0) {
119b4668
RB
980 if (reply->transports[0].lower_transport != rt->lower_transport ||
981 reply->transports[0].transport != rt->transport) {
1617ad97
FB
982 err = AVERROR_INVALIDDATA;
983 goto fail;
984 }
985 } else {
90abbdba 986 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 987 rt->transport = reply->transports[0].transport;
1617ad97
FB
988 }
989
990 /* close RTP connection if not choosen */
90abbdba
RB
991 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
992 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
993 url_close(rtsp_st->rtp_handle);
994 rtsp_st->rtp_handle = NULL;
1617ad97
FB
995 }
996
90abbdba
RB
997 switch(reply->transports[0].lower_transport) {
998 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
999 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1000 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1001 break;
115329f1 1002
90abbdba 1003 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
1004 {
1005 char url[1024];
115329f1 1006
1617ad97 1007 /* XXX: also use address if specified */
115329f1 1008 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1009 host, reply->transports[0].server_port_min);
8b1ab7bf 1010 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1011 err = AVERROR_INVALIDDATA;
1012 goto fail;
1013 }
1014 }
1015 break;
90abbdba 1016 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1017 {
1018 char url[1024];
d02678ec 1019 struct in_addr in;
1617ad97 1020
d02678ec 1021 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1022 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1023 inet_ntoa(in),
1024 reply->transports[0].port_min,
1025 reply->transports[0].ttl);
dbf30963 1026 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1027 err = AVERROR_INVALIDDATA;
1028 goto fail;
1029 }
1030 }
1031 break;
1032 }
d1ccf0e0 1033
ee0cb67f 1034 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1035 goto fail;
1617ad97
FB
1036 }
1037
2e889ae4 1038 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1039 rt->need_subscription = 1;
1040
53620bba
RB
1041 return 0;
1042
1043fail:
8a8754d8
RB
1044 for (i=0; i<rt->nb_rtsp_streams; i++) {
1045 if (rt->rtsp_streams[i]->rtp_handle) {
1046 url_close(rt->rtsp_streams[i]->rtp_handle);
1047 rt->rtsp_streams[i]->rtp_handle = NULL;
1048 }
1049 }
53620bba
RB
1050 return err;
1051}
1052
1053static int rtsp_read_header(AVFormatContext *s,
1054 AVFormatParameters *ap)
1055{
1056 RTSPState *rt = s->priv_data;
1057 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1058 URLContext *rtsp_hd;
1059 int port, ret, err;
1060 RTSPHeader reply1, *reply = &reply1;
1061 unsigned char *content = NULL;
90abbdba 1062 int lower_transport_mask = 0;
1cf151e9 1063 char real_challenge[64];
53620bba
RB
1064
1065 /* extract hostname and port */
1066 url_split(NULL, 0, NULL, 0,
1067 host, sizeof(host), &port, path, sizeof(path), s->filename);
1068 if (port < 0)
1069 port = RTSP_DEFAULT_PORT;
1070
1071 /* search for options */
1072 option_list = strchr(path, '?');
1073 if (option_list) {
1074 /* remove the options from the path */
1075 *option_list++ = 0;
1076 while(option_list) {
1077 /* move the option pointer */
1078 option = option_list;
1079 option_list = strchr(option_list, '&');
1080 if (option_list)
1081 *(option_list++) = 0;
1082 /* handle the options */
1083 if (strcmp(option, "udp") == 0)
90abbdba 1084 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1085 else if (strcmp(option, "multicast") == 0)
90abbdba 1086 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1087 else if (strcmp(option, "tcp") == 0)
90abbdba 1088 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1089 }
1090 }
1091
90abbdba
RB
1092 if (!lower_transport_mask)
1093 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
53620bba
RB
1094
1095 /* open the tcp connexion */
1096 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1097 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1098 return AVERROR(EIO);
1099 rt->rtsp_hd = rtsp_hd;
1100 rt->seq = 0;
1101
1cf151e9
RB
1102 /* request options supported by the server; this also detects server type */
1103 for (rt->server_type = RTSP_SERVER_RTP;;) {
1104 snprintf(cmd, sizeof(cmd),
1105 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1106 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1107 av_strlcat(cmd,
1108 /**
1109 * The following entries are required for proper
1110 * streaming from a Realmedia server. They are
1111 * interdependent in some way although we currently
1112 * don't quite understand how. Values were copied
1113 * from mplayer SVN r23589.
1114 * @param CompanyID is a 16-byte ID in base64
1115 * @param ClientChallenge is a 16-byte ID in hex
1116 */
1117 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1118 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1119 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1120 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1121 sizeof(cmd));
1122 rtsp_send_cmd(s, cmd, reply, NULL);
1123 if (reply->status_code != RTSP_STATUS_OK) {
1124 err = AVERROR_INVALIDDATA;
1125 goto fail;
1126 }
1127
1128 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1129 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1130 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1131 continue;
7a86bafa
RB
1132 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1133 rt->server_type = RTSP_SERVER_WMS;
2e889ae4 1134 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1135 strcpy(real_challenge, reply->real_challenge);
1136 }
1137 break;
1138 }
1139
53620bba
RB
1140 /* describe the stream */
1141 snprintf(cmd, sizeof(cmd),
1142 "DESCRIBE %s RTSP/1.0\r\n"
1143 "Accept: application/sdp\r\n",
1144 s->filename);
2e889ae4 1145 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1146 /**
1147 * The Require: attribute is needed for proper streaming from
1148 * Realmedia servers.
1149 */
1150 av_strlcat(cmd,
1151 "Require: com.real.retain-entity-for-setup\r\n",
1152 sizeof(cmd));
1153 }
53620bba
RB
1154 rtsp_send_cmd(s, cmd, reply, &content);
1155 if (!content) {
1156 err = AVERROR_INVALIDDATA;
1157 goto fail;
1158 }
1159 if (reply->status_code != RTSP_STATUS_OK) {
1160 err = AVERROR_INVALIDDATA;
1161 goto fail;
1162 }
1163
1164 /* now we got the SDP description, we parse it */
1165 ret = sdp_parse(s, (const char *)content);
1166 av_freep(&content);
1167 if (ret < 0) {
1168 err = AVERROR_INVALIDDATA;
1169 goto fail;
1170 }
1171
8a8754d8 1172 do {
90abbdba 1173 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1174
90abbdba 1175 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1176 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1177 real_challenge : NULL);
8a8754d8 1178 if (err < 0)
7e6ca34f 1179 goto fail;
90abbdba
RB
1180 lower_transport_mask &= ~(1 << lower_transport);
1181 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1182 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1183 goto fail;
1184 }
1185 } while (err);
53620bba 1186
ff762d6e
FB
1187 rt->state = RTSP_STATE_IDLE;
1188 rt->seek_timestamp = 0; /* default is to start stream at position
1189 zero */
c04c3282 1190 if (ap->initial_pause) {
ff762d6e
FB
1191 /* do not start immediately */
1192 } else {
1193 if (rtsp_read_play(s) < 0) {
1194 err = AVERROR_INVALIDDATA;
1617ad97
FB
1195 goto fail;
1196 }
1197 }
1617ad97
FB
1198 return 0;
1199 fail:
8b1ab7bf 1200 rtsp_close_streams(rt);
1617ad97
FB
1201 av_freep(&content);
1202 url_close(rt->rtsp_hd);
1203 return err;
1204}
1205
8b1ab7bf
FB
1206static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1207 uint8_t *buf, int buf_size)
1617ad97
FB
1208{
1209 RTSPState *rt = s->priv_data;
b6892136 1210 int id, len, i, ret;
1617ad97 1211 RTSPStream *rtsp_st;
1617ad97 1212
b6892136
FB
1213#ifdef DEBUG_RTP_TCP
1214 printf("tcp_read_packet:\n");
1215#endif
1617ad97
FB
1216 redo:
1217 for(;;) {
2a42b5c3 1218 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1219#ifdef DEBUG_RTP_TCP
1220 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1221#endif
1222 if (ret != 1)
8b1ab7bf 1223 return -1;
b6892136 1224 if (buf[0] == '$')
1617ad97
FB
1225 break;
1226 }
2a42b5c3 1227 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1228 if (ret != 3)
8b1ab7bf 1229 return -1;
b6892136 1230 id = buf[0];
80fb8234 1231 len = AV_RB16(buf + 1);
b6892136
FB
1232#ifdef DEBUG_RTP_TCP
1233 printf("id=%d len=%d\n", id, len);
1234#endif
8b1ab7bf 1235 if (len > buf_size || len < 12)
1617ad97
FB
1236 goto redo;
1237 /* get the data */
2a42b5c3 1238 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1239 if (ret != len)
8b1ab7bf 1240 return -1;
985b05d3 1241 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1242 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1243 return -1;
115329f1 1244
1617ad97 1245 /* find the matching stream */
8b1ab7bf
FB
1246 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1247 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1248 if (id >= rtsp_st->interleaved_min &&
1249 id <= rtsp_st->interleaved_max)
1617ad97
FB
1250 goto found;
1251 }
1252 goto redo;
1253 found:
8b1ab7bf
FB
1254 *prtsp_st = rtsp_st;
1255 return len;
1617ad97
FB
1256}
1257
115329f1 1258static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1259 uint8_t *buf, int buf_size)
1617ad97 1260{
8b1ab7bf 1261 RTSPState *rt = s->priv_data;
1617ad97
FB
1262 RTSPStream *rtsp_st;
1263 fd_set rfds;
1264 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1265 struct timeval tv;
1266
1267 for(;;) {
b7b8fc34 1268 if (url_interrupt_cb())
a960a1e0 1269 return AVERROR(EINTR);
1617ad97
FB
1270 FD_ZERO(&rfds);
1271 fd_max = -1;
8b1ab7bf
FB
1272 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1273 rtsp_st = rt->rtsp_streams[i];
1617ad97 1274 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1275 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1276 if (fd1 > fd_max)
1277 fd_max = fd1;
1278 FD_SET(fd1, &rfds);
1279 }
1617ad97 1280 tv.tv_sec = 0;
b7b8fc34 1281 tv.tv_usec = 100 * 1000;
1617ad97
FB
1282 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1283 if (n > 0) {
8b1ab7bf
FB
1284 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1285 rtsp_st = rt->rtsp_streams[i];
1286 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1287 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1288 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1289 if (ret > 0) {
1290 *prtsp_st = rtsp_st;
1617ad97
FB
1291 return ret;
1292 }
1293 }
1294 }
1295 }
1296 }
1297}
1298
1299static int rtsp_read_packet(AVFormatContext *s,
1300 AVPacket *pkt)
1301{
1302 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1303 RTSPStream *rtsp_st;
1304 int ret, len;
e49906c3 1305 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
8b1ab7bf 1306
572c6a38 1307 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b
RB
1308 int i;
1309 RTSPHeader reply1, *reply = &reply1;
572c6a38 1310 enum AVDiscard cache[MAX_STREAMS];
1256d16b
RB
1311 char cmd[1024];
1312
572c6a38
RB
1313 for (i = 0; i < s->nb_streams; i++)
1314 cache[i] = s->streams[i]->discard;
1315
1316 if (!rt->need_subscription) {
1317 if (memcmp (cache, rt->real_setup_cache,
1318 sizeof(enum AVDiscard) * s->nb_streams)) {
1319 av_strlcatf(cmd, sizeof(cmd),
1320 "SET_PARAMETER %s RTSP/1.0\r\n"
1321 "Unsubscribe: %s\r\n",
1322 s->filename, rt->last_subscription);
1323 rtsp_send_cmd(s, cmd, reply, NULL);
1324 if (reply->status_code != RTSP_STATUS_OK)
1325 return AVERROR_INVALIDDATA;
1326 rt->need_subscription = 1;
1327 }
1256d16b 1328 }
1256d16b 1329
572c6a38
RB
1330 if (rt->need_subscription) {
1331 int r, rule_nr, first = 1;
1332
1333 memcpy(rt->real_setup_cache, cache,
1334 sizeof(enum AVDiscard) * s->nb_streams);
1335 rt->last_subscription[0] = 0;
1336
1337 snprintf(cmd, sizeof(cmd),
1338 "SET_PARAMETER %s RTSP/1.0\r\n"
1339 "Subscribe: ",
1340 s->filename);
1341 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1342 rule_nr = 0;
1343 for (r = 0; r < s->nb_streams; r++) {
1344 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1345 if (s->streams[r]->discard != AVDISCARD_ALL) {
1346 if (!first)
1347 av_strlcat(rt->last_subscription, ",",
1348 sizeof(rt->last_subscription));
1349 ff_rdt_subscribe_rule(
1350 rt->last_subscription,
1351 sizeof(rt->last_subscription), i, rule_nr);
1352 first = 0;
1353 }
1354 rule_nr++;
1355 }
1356 }
1357 }
1358 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1359 rtsp_send_cmd(s, cmd, reply, NULL);
1360 if (reply->status_code != RTSP_STATUS_OK)
1361 return AVERROR_INVALIDDATA;
1362 rt->need_subscription = 0;
1363
1364 if (rt->state == RTSP_STATE_PLAYING)
1365 rtsp_read_play (s);
1366 }
1256d16b
RB
1367 }
1368
8b1ab7bf 1369 /* get next frames from the same RTP packet */
5465b0d4 1370 if (rt->cur_tx) {
119b4668 1371 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1372 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
4fce284c 1373 else
5465b0d4 1374 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
8b1ab7bf 1375 if (ret == 0) {
5465b0d4 1376 rt->cur_tx = NULL;
8b1ab7bf
FB
1377 return 0;
1378 } else if (ret == 1) {
1379 return 0;
1380 } else {
5465b0d4 1381 rt->cur_tx = NULL;
8b1ab7bf
FB
1382 }
1383 }
1617ad97 1384
8b1ab7bf
FB
1385 /* read next RTP packet */
1386 redo:
90abbdba 1387 switch(rt->lower_transport) {
1617ad97 1388 default:
90abbdba 1389 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1390 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1391 break;
90abbdba
RB
1392 case RTSP_LOWER_TRANSPORT_UDP:
1393 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1394 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
6ff1f615 1395 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
5465b0d4 1396 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1617ad97
FB
1397 break;
1398 }
8b1ab7bf 1399 if (len < 0)
489b0d4d 1400 return len;
119b4668 1401 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1402 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
4fce284c 1403 else
5465b0d4 1404 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
8b1ab7bf
FB
1405 if (ret < 0)
1406 goto redo;
1407 if (ret == 1) {
1408 /* more packets may follow, so we save the RTP context */
5465b0d4 1409 rt->cur_tx = rtsp_st->tx_ctx;
8b1ab7bf
FB
1410 }
1411 return 0;
1617ad97
FB
1412}
1413
ff762d6e 1414static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1415{
ff762d6e 1416 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1417 RTSPHeader reply1, *reply = &reply1;
1418 char cmd[1024];
1419
bc874dae 1420 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1421
2e889ae4 1422 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1423 if (rt->state == RTSP_STATE_PAUSED) {
1424 snprintf(cmd, sizeof(cmd),
1425 "PLAY %s RTSP/1.0\r\n",
1426 s->filename);
1427 } else {
1428 snprintf(cmd, sizeof(cmd),
1429 "PLAY %s RTSP/1.0\r\n"
1430 "Range: npt=%0.3f-\r\n",
1431 s->filename,
1432 (double)rt->seek_timestamp / AV_TIME_BASE);
1433 }
1434 rtsp_send_cmd(s, cmd, reply, NULL);
1435 if (reply->status_code != RTSP_STATUS_OK) {
1436 return -1;
1437 }
1256d16b 1438 }
5f86057f
RB
1439 rt->state = RTSP_STATE_PLAYING;
1440 return 0;
b7b8fc34
FB
1441}
1442
ff762d6e
FB
1443/* pause the stream */
1444static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1445{
ff762d6e 1446 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1447 RTSPHeader reply1, *reply = &reply1;
1448 char cmd[1024];
1449
b7b8fc34 1450 rt = s->priv_data;
115329f1 1451
ff762d6e
FB
1452 if (rt->state != RTSP_STATE_PLAYING)
1453 return 0;
2e889ae4 1454 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1455 snprintf(cmd, sizeof(cmd),
1456 "PAUSE %s RTSP/1.0\r\n",
1457 s->filename);
1458 rtsp_send_cmd(s, cmd, reply, NULL);
1459 if (reply->status_code != RTSP_STATUS_OK) {
1460 return -1;
1461 }
1256d16b 1462 }
5f86057f
RB
1463 rt->state = RTSP_STATE_PAUSED;
1464 return 0;
b7b8fc34
FB
1465}
1466
115329f1 1467static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1468 int64_t timestamp, int flags)
ff762d6e
FB
1469{
1470 RTSPState *rt = s->priv_data;
115329f1 1471
50755217 1472 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1473 switch(rt->state) {
1474 default:
1475 case RTSP_STATE_IDLE:
1476 break;
1477 case RTSP_STATE_PLAYING:
1478 if (rtsp_read_play(s) != 0)
1479 return -1;
1480 break;
1481 case RTSP_STATE_PAUSED:
1482 rt->state = RTSP_STATE_IDLE;
1483 break;
1484 }
1485 return 0;
1486}
1487
1617ad97
FB
1488static int rtsp_read_close(AVFormatContext *s)
1489{
1490 RTSPState *rt = s->priv_data;
1617ad97 1491 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1492 char cmd[1024];
1493
b6892136 1494#if 0
1617ad97 1495 /* NOTE: it is valid to flush the buffer here */
90abbdba 1496 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1497 url_fclose(&rt->rtsp_gb);
1498 }
b6892136 1499#endif
115329f1 1500 snprintf(cmd, sizeof(cmd),
b6892136 1501 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1502 s->filename);
1503 rtsp_send_cmd(s, cmd, reply, NULL);
1504
8b1ab7bf 1505 rtsp_close_streams(rt);
1617ad97
FB
1506 url_close(rt->rtsp_hd);
1507 return 0;
1508}
1509
b250f9c6 1510#if CONFIG_RTSP_DEMUXER
d2a067d1 1511AVInputFormat rtsp_demuxer = {
1617ad97 1512 "rtsp",
bde15e74 1513 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1514 sizeof(RTSPState),
1515 rtsp_probe,
1516 rtsp_read_header,
1517 rtsp_read_packet,
1518 rtsp_read_close,
ff762d6e 1519 rtsp_read_seek,
bb76a117 1520 .flags = AVFMT_NOFILE,
ff762d6e
FB
1521 .read_play = rtsp_read_play,
1522 .read_pause = rtsp_read_pause,
1617ad97 1523};
96862926 1524#endif
1617ad97 1525
cb1fdc61 1526static int sdp_probe(AVProbeData *p1)
93ced3e8 1527{
0e1ceacd 1528 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1529
1530 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1531 while (p < p_end && *p != '\0') {
f7d78f36 1532 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1533 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1534
1535 while(p < p_end - 1 && *p != '\n') p++;
1536 if (++p >= p_end)
cb1fdc61 1537 break;
cb1fdc61
FB
1538 if (*p == '\r')
1539 p++;
1540 }
93ced3e8
FB
1541 return 0;
1542}
1543
1544#define SDP_MAX_SIZE 8192
1545
1546static int sdp_read_header(AVFormatContext *s,
1547 AVFormatParameters *ap)
1548{
8b1ab7bf 1549 RTSPState *rt = s->priv_data;
93ced3e8
FB
1550 RTSPStream *rtsp_st;
1551 int size, i, err;
1552 char *content;
1553 char url[1024];
1554
1555 /* read the whole sdp file */
1556 /* XXX: better loading */
1557 content = av_malloc(SDP_MAX_SIZE);
899681cd 1558 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1559 if (size <= 0) {
1560 av_free(content);
1561 return AVERROR_INVALIDDATA;
1562 }
1563 content[size] ='\0';
1564
1565 sdp_parse(s, content);
1566 av_free(content);
1567
1568 /* open each RTP stream */
8b1ab7bf
FB
1569 for(i=0;i<rt->nb_rtsp_streams;i++) {
1570 rtsp_st = rt->rtsp_streams[i];
115329f1 1571
d2bf42be 1572 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1573 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1574 rtsp_st->sdp_port,
d2bf42be 1575 rtsp_st->sdp_port,
93ced3e8 1576 rtsp_st->sdp_ttl);
dbf30963 1577 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1578 err = AVERROR_INVALIDDATA;
1579 goto fail;
1580 }
ee0cb67f 1581 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1582 goto fail;
93ced3e8
FB
1583 }
1584 return 0;
1585 fail:
8b1ab7bf 1586 rtsp_close_streams(rt);
93ced3e8
FB
1587 return err;
1588}
1589
1590static int sdp_read_packet(AVFormatContext *s,
1591 AVPacket *pkt)
1592{
8b1ab7bf 1593 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1594}
1595
1596static int sdp_read_close(AVFormatContext *s)
1597{
8b1ab7bf
FB
1598 RTSPState *rt = s->priv_data;
1599 rtsp_close_streams(rt);
93ced3e8
FB
1600 return 0;
1601}
1602
b250f9c6 1603#if CONFIG_SDP_DEMUXER
ff70e601 1604AVInputFormat sdp_demuxer = {
93ced3e8 1605 "sdp",
bde15e74 1606 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1607 sizeof(RTSPState),
1608 sdp_probe,
1609 sdp_read_header,
1610 sdp_read_packet,
1611 sdp_read_close,
1612};
ff70e601 1613#endif
93ced3e8 1614
b250f9c6 1615#if CONFIG_REDIR_DEMUXER
1617ad97
FB
1616/* dummy redirector format (used directly in av_open_input_file now) */
1617static int redir_probe(AVProbeData *pd)
1618{
1619 const char *p;
1620 p = pd->buf;
1621 while (redir_isspace(*p))
1622 p++;
f7d78f36
MR
1623 if (av_strstart(p, "http://", NULL) ||
1624 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1625 return AVPROBE_SCORE_MAX;
1626 return 0;
1627}
1628
e8acf0ed 1629static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1630{
1631 char buf[4096], *q;
1632 int c;
1633 AVFormatContext *ic = NULL;
e8acf0ed 1634 ByteIOContext *f = s->pb;
1617ad97
FB
1635
1636 /* parse each URL and try to open it */
1637 c = url_fgetc(f);
1638 while (c != URL_EOF) {
1639 /* skip spaces */
1640 for(;;) {
1641 if (!redir_isspace(c))
1642 break;
1643 c = url_fgetc(f);
1644 }
1645 if (c == URL_EOF)
1646 break;
1647 /* record url */
1648 q = buf;
1649 for(;;) {
1650 if (c == URL_EOF || redir_isspace(c))
1651 break;
1652 if ((q - buf) < sizeof(buf) - 1)
1653 *q++ = c;
1654 c = url_fgetc(f);
1655 }
1656 *q = '\0';
1657 //printf("URL='%s'\n", buf);
1658 /* try to open the media file */
1659 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1660 break;
1661 }
1617ad97 1662 if (!ic)
6f3e0b21 1663 return AVERROR(EIO);
e8acf0ed
LA
1664
1665 *s = *ic;
1666 url_fclose(f);
1667
1668 return 0;
1617ad97
FB
1669}
1670
d2a067d1 1671AVInputFormat redir_demuxer = {
1617ad97 1672 "redir",
bde15e74 1673 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1674 0,
1675 redir_probe,
e8acf0ed 1676 redir_read_header,
1617ad97
FB
1677 NULL,
1678 NULL,
1679};
e7047005 1680#endif