Reindent after r16509.
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
1617ad97
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3 * Copyright (c) 2002 Fabrice Bellard.
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"
1617ad97
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26#include "avformat.h"
27
db0ed93e 28#include <sys/time.h>
6ad1c9c9 29#ifdef HAVE_SYS_SELECT_H
933bd8e2 30#include <sys/select.h>
6ad1c9c9 31#endif
ea452b54 32#include <strings.h>
42572ef5 33#include "network.h"
c971ff19 34#include "rtsp.h"
1617ad97 35
4934884a 36#include "rtp_internal.h"
e9dea59f 37#include "rdt.h"
4934884a 38
1617ad97 39//#define DEBUG
b6892136 40//#define DEBUG_RTP_TCP
1617ad97 41
ff762d6e
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42static int rtsp_read_play(AVFormatContext *s);
43
1617ad97
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44/* XXX: currently, the only way to change the protocols consists in
45 changing this variable */
1617ad97 46
c482500f 47#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 48int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 49#endif
85fb7b34 50
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51static int rtsp_probe(AVProbeData *p)
52{
f7d78f36 53 if (av_strstart(p->filename, "rtsp:", NULL))
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54 return AVPROBE_SCORE_MAX;
55 return 0;
56}
57
58static int redir_isspace(int c)
59{
ccd425e7 60 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
1617ad97
FB
61}
62
63static void skip_spaces(const char **pp)
64{
65 const char *p;
66 p = *pp;
67 while (redir_isspace(*p))
68 p++;
69 *pp = p;
70}
71
115329f1 72static void get_word_sep(char *buf, int buf_size, const char *sep,
1617ad97
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73 const char **pp)
74{
75 const char *p;
76 char *q;
77
78 p = *pp;
d1ccf0e0
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79 if (*p == '/')
80 p++;
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81 skip_spaces(&p);
82 q = buf;
83 while (!strchr(sep, *p) && *p != '\0') {
84 if ((q - buf) < buf_size - 1)
85 *q++ = *p;
86 p++;
87 }
88 if (buf_size > 0)
89 *q = '\0';
90 *pp = p;
91}
92
93static void get_word(char *buf, int buf_size, const char **pp)
94{
95 const char *p;
96 char *q;
97
98 p = *pp;
99 skip_spaces(&p);
100 q = buf;
101 while (!redir_isspace(*p) && *p != '\0') {
102 if ((q - buf) < buf_size - 1)
103 *q++ = *p;
104 p++;
105 }
106 if (buf_size > 0)
107 *q = '\0';
108 *pp = p;
109}
110
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111/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
112 params>] */
4934884a 113static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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114{
115 char buf[256];
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116 int i;
117 AVCodec *c;
7b49ce2e 118 const char *c_name;
93ced3e8 119
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120 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
121 see if we can handle this kind of payload */
93ced3e8 122 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 123 if (payload_type >= RTP_PT_PRIVATE) {
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124 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
125 while(handler) {
126 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
127 codec->codec_id = handler->codec_id;
128 rtsp_st->dynamic_handler= handler;
129 if(handler->open) {
130 rtsp_st->dynamic_protocol_context= handler->open();
131 }
d1ccf0e0
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132 break;
133 }
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134 handler= handler->next;
135 }
93ced3e8 136 } else {
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137 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
138 /* search into AVRtpPayloadTypes[] */
7ed19d7f 139 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
140 }
141
142 c = avcodec_find_decoder(codec->codec_id);
143 if (c && c->name)
7b49ce2e 144 c_name = c->name;
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RD
145 else
146 c_name = (char *)NULL;
147
148 if (c_name) {
149 get_word_sep(buf, sizeof(buf), "/", &p);
150 i = atoi(buf);
151 switch (codec->codec_type) {
152 case CODEC_TYPE_AUDIO:
153 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
154 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
155 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
156 if (i > 0) {
157 codec->sample_rate = i;
158 get_word_sep(buf, sizeof(buf), "/", &p);
159 i = atoi(buf);
160 if (i > 0)
161 codec->channels = i;
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162 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
163 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
d1ccf0e0
RD
164 }
165 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
166 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
167 break;
168 case CODEC_TYPE_VIDEO:
169 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
170 break;
171 default:
172 break;
173 }
174 return 0;
93ced3e8 175 }
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176
177 return -1;
93ced3e8
FB
178}
179
180/* return the length and optionnaly the data */
181static int hex_to_data(uint8_t *data, const char *p)
182{
183 int c, len, v;
184
185 len = 0;
186 v = 1;
187 for(;;) {
188 skip_spaces(&p);
189 if (p == '\0')
190 break;
191 c = toupper((unsigned char)*p++);
192 if (c >= '0' && c <= '9')
193 c = c - '0';
194 else if (c >= 'A' && c <= 'F')
195 c = c - 'A' + 10;
196 else
197 break;
198 v = (v << 4) | c;
199 if (v & 0x100) {
200 if (data)
201 data[len] = v;
202 len++;
203 v = 1;
204 }
205 }
206 return len;
207}
208
d1ccf0e0
RD
209static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
210{
211 switch (codec->codec_id) {
212 case CODEC_ID_MPEG4:
cbee7a69 213 case CODEC_ID_AAC:
d1ccf0e0
RD
214 if (!strcmp(attr, "config")) {
215 /* decode the hexa encoded parameter */
216 int len = hex_to_data(NULL, value);
217 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
218 if (!codec->extradata)
219 return;
220 codec->extradata_size = len;
221 hex_to_data(codec->extradata, value);
222 }
223 break;
224 default:
225 break;
226 }
227 return;
228}
229
644e7acb 230typedef struct {
7b49ce2e 231 const char *str;
d1ccf0e0
RD
232 uint16_t type;
233 uint32_t offset;
644e7acb 234} AttrNameMap;
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235
236/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
237#define ATTR_NAME_TYPE_INT 0
238#define ATTR_NAME_TYPE_STR 1
644e7acb 239static const AttrNameMap attr_names[]=
d1ccf0e0 240{
be73a544
LA
241 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
242 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
243 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
244 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
245 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
246 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
d1ccf0e0
RD
247 {NULL, -1, -1},
248};
249
d0deedcb
RM
250/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
251* because it is used in rtp_h264.c, which is forthcoming.
252*/
253int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
254{
255 skip_spaces(p);
256 if(**p)
257 {
258 get_word_sep(attr, attr_size, "=", p);
259 if (**p == '=')
260 (*p)++;
261 get_word_sep(value, value_size, ";", p);
262 if (**p == ';')
263 (*p)++;
264 return 1;
265 }
266 return 0;
267}
268
d1ccf0e0
RD
269/* parse a SDP line and save stream attributes */
270static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
271{
272 char attr[256];
273 char value[4096];
d1ccf0e0
RD
274 int i;
275
276 RTSPStream *rtsp_st = st->priv_data;
01f4895c 277 AVCodecContext *codec = st->codec;
be73a544 278 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
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279
280 /* loop on each attribute */
1ad20f96
RM
281 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
282 {
bb270c08 283 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
284 sdp_parse_fmtp_config(codec, attr, value);
285 /* Looking for a known attribute */
286 for (i = 0; attr_names[i].str; ++i) {
287 if (!strcasecmp(attr, attr_names[i].str)) {
288 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
289 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
290 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
291 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 292 }
93ced3e8 293 }
93ced3e8
FB
294 }
295}
296
31693e00
RM
297/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
298 * and end time.
299 * Used for seeking in the rtp stream.
300 */
301static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
302{
303 char buf[256];
304
305 skip_spaces(&p);
f7d78f36 306 if (!av_stristart(p, "npt=", &p))
31693e00
RM
307 return;
308
309 *start = AV_NOPTS_VALUE;
310 *end = AV_NOPTS_VALUE;
311
312 get_word_sep(buf, sizeof(buf), "-", &p);
313 *start = parse_date(buf, 1);
314 if (*p == '-') {
315 p++;
316 get_word_sep(buf, sizeof(buf), "-", &p);
317 *end = parse_date(buf, 1);
318 }
319// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
320// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
321}
322
93ced3e8
FB
323typedef struct SDPParseState {
324 /* SDP only */
325 struct in_addr default_ip;
326 int default_ttl;
327} SDPParseState;
328
329static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
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330 int letter, const char *buf)
331{
8b1ab7bf 332 RTSPState *rt = s->priv_data;
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333 char buf1[64], st_type[64];
334 const char *p;
fb65d2ca
DP
335 enum CodecType codec_type;
336 int payload_type, i;
1617ad97
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337 AVStream *st;
338 RTSPStream *rtsp_st;
93ced3e8
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339 struct in_addr sdp_ip;
340 int ttl;
341
1617ad97
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342#ifdef DEBUG
343 printf("sdp: %c='%s'\n", letter, buf);
344#endif
345
346 p = buf;
347 switch(letter) {
93ced3e8
FB
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;
1617ad97 374 case 's':
75e61b0e 375 av_strlcpy(s->title, p, sizeof(s->title));
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376 break;
377 case 'i':
378 if (s->nb_streams == 0) {
75e61b0e 379 av_strlcpy(s->comment, p, sizeof(s->comment));
1617ad97
FB
380 break;
381 }
382 break;
383 case 'm':
384 /* new stream */
385 get_word(st_type, sizeof(st_type), &p);
386 if (!strcmp(st_type, "audio")) {
387 codec_type = CODEC_TYPE_AUDIO;
388 } else if (!strcmp(st_type, "video")) {
389 codec_type = CODEC_TYPE_VIDEO;
390 } else {
391 return;
392 }
1617ad97
FB
393 rtsp_st = av_mallocz(sizeof(RTSPStream));
394 if (!rtsp_st)
395 return;
8b1ab7bf
FB
396 rtsp_st->stream_index = -1;
397 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
398
399 rtsp_st->sdp_ip = s1->default_ip;
400 rtsp_st->sdp_ttl = s1->default_ttl;
401
93ced3e8
FB
402 get_word(buf1, sizeof(buf1), &p); /* port */
403 rtsp_st->sdp_port = atoi(buf1);
404
405 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 406
93ced3e8
FB
407 /* XXX: handle list of formats */
408 get_word(buf1, sizeof(buf1), &p); /* format list */
409 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 410
7ed19d7f 411 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
412 /* no corresponding stream */
413 } else {
414 st = av_new_stream(s, 0);
415 if (!st)
416 return;
417 st->priv_data = rtsp_st;
418 rtsp_st->stream_index = st->index;
01f4895c 419 st->codec->codec_type = codec_type;
d1ccf0e0 420 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 421 /* if standard payload type, we can find the codec right now */
01f4895c 422 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
423 }
424 }
1617ad97 425 /* put a default control url */
75e61b0e 426 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1617ad97
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427 break;
428 case 'a':
f7d78f36 429 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
1617ad97
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430 char proto[32];
431 /* get the control url */
432 st = s->streams[s->nb_streams - 1];
433 rtsp_st = st->priv_data;
115329f1 434
1617ad97 435 /* XXX: may need to add full url resolution */
6ba5cbc6 436 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
437 if (proto[0] == '\0') {
438 /* relative control URL */
75e61b0e
MR
439 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
440 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 441 } else {
75e61b0e 442 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 443 }
83d14c85 444 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 445 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 446 get_word(buf1, sizeof(buf1), &p);
93ced3e8 447 payload_type = atoi(buf1);
83d14c85 448 st = s->streams[s->nb_streams - 1];
ff16f551
RB
449 rtsp_st = st->priv_data;
450 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
f7d78f36 451 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 452 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 453 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
454 payload_type = atoi(buf1);
455 for(i = 0; i < s->nb_streams;i++) {
456 st = s->streams[i];
457 rtsp_st = st->priv_data;
458 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 459 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 460 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
4934884a
RM
461 sdp_parse_fmtp(st, p);
462 }
463 } else {
ed787542 464 sdp_parse_fmtp(st, p);
4934884a 465 }
93ced3e8
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466 }
467 }
f7d78f36 468 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
469 // let dynamic protocol handlers have a stab at the line.
470 get_word(buf1, sizeof(buf1), &p);
471 payload_type = atoi(buf1);
472 for(i = 0; i < s->nb_streams;i++) {
473 st = s->streams[i];
474 rtsp_st = st->priv_data;
475 if (rtsp_st->sdp_payload_type == payload_type) {
476 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 477 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
d0deedcb
RM
478 }
479 }
480 }
f7d78f36 481 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
482 int64_t start, end;
483
484 // this is so that seeking on a streamed file can work.
485 rtsp_parse_range_npt(p, &start, &end);
486 s->start_time= start;
487 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
119b4668
RB
488 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
489 if (atoi(p) == 1)
490 rt->transport = RTSP_TRANSPORT_RDT;
8646b907 491 } else if (s->nb_streams > 0) {
3ca45429
RB
492 if (rt->server_type == RTSP_SERVER_REAL)
493 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
494
8646b907
RB
495 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
496 if (rtsp_st->dynamic_handler &&
497 rtsp_st->dynamic_handler->parse_sdp_a_line)
7b2a0708 498 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
8646b907 499 rtsp_st->dynamic_protocol_context, buf);
1617ad97
FB
500 }
501 break;
502 }
503}
504
5c91a675 505static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
506{
507 const char *p;
508 int letter;
b965ff35
RB
509 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams, contain long SDP
510 * lines containing complete ASF Headers (several kB) or arrays of MDPR (RM stream
511 * descriptor) headers plus "rulebooks" describing their properties. Therefore, the
512 * SDP line buffer is large. */
e322d3f5 513 char buf[8192], *q;
93ced3e8 514 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 515
93ced3e8 516 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
517 p = content;
518 for(;;) {
519 skip_spaces(&p);
520 letter = *p;
521 if (letter == '\0')
522 break;
523 p++;
524 if (*p != '=')
525 goto next_line;
526 p++;
527 /* get the content */
528 q = buf;
b6892136 529 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
530 if ((q - buf) < sizeof(buf) - 1)
531 *q++ = *p;
532 p++;
533 }
534 *q = '\0';
93ced3e8 535 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
536 next_line:
537 while (*p != '\n' && *p != '\0')
538 p++;
539 if (*p == '\n')
540 p++;
541 }
542 return 0;
543}
544
545static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
546{
547 const char *p;
548 int v;
549
550 p = *pp;
551 skip_spaces(&p);
552 v = strtol(p, (char **)&p, 10);
553 if (*p == '-') {
554 p++;
555 *min_ptr = v;
556 v = strtol(p, (char **)&p, 10);
557 *max_ptr = v;
558 } else {
559 *min_ptr = v;
560 *max_ptr = v;
561 }
562 *pp = p;
563}
564
565/* XXX: only one transport specification is parsed */
566static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
567{
568 char transport_protocol[16];
569 char profile[16];
570 char lower_transport[16];
571 char parameter[16];
572 RTSPTransportField *th;
573 char buf[256];
115329f1 574
1617ad97 575 reply->nb_transports = 0;
115329f1 576
1617ad97
FB
577 for(;;) {
578 skip_spaces(&p);
579 if (*p == '\0')
580 break;
581
582 th = &reply->transports[reply->nb_transports];
583
115329f1 584 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
585 "/", &p);
586 if (*p == '/')
587 p++;
e1502118 588 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
589 get_word_sep(profile, sizeof(profile), "/;,", &p);
590 lower_transport[0] = '\0';
591 /* rtp/avp/<protocol> */
592 if (*p == '/') {
593 p++;
594 get_word_sep(lower_transport, sizeof(lower_transport),
595 ";,", &p);
119b4668
RB
596 }
597 th->transport = RTSP_TRANSPORT_RTP;
598 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
599 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 600 /* x-pn-tng/<protocol> */
e1502118
LB
601 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
602 profile[0] = '\0';
119b4668 603 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 604 }
b6892136 605 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 606 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 607 else
90abbdba 608 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 609
1617ad97
FB
610 if (*p == ';')
611 p++;
612 /* get each parameter */
613 while (*p != '\0' && *p != ',') {
614 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
615 if (!strcmp(parameter, "port")) {
616 if (*p == '=') {
617 p++;
618 rtsp_parse_range(&th->port_min, &th->port_max, &p);
619 }
620 } else if (!strcmp(parameter, "client_port")) {
621 if (*p == '=') {
622 p++;
115329f1 623 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
624 &th->client_port_max, &p);
625 }
626 } else if (!strcmp(parameter, "server_port")) {
627 if (*p == '=') {
628 p++;
115329f1 629 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
630 &th->server_port_max, &p);
631 }
632 } else if (!strcmp(parameter, "interleaved")) {
633 if (*p == '=') {
634 p++;
115329f1 635 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
636 &th->interleaved_max, &p);
637 }
638 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
639 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
640 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
641 } else if (!strcmp(parameter, "ttl")) {
642 if (*p == '=') {
643 p++;
644 th->ttl = strtol(p, (char **)&p, 10);
645 }
646 } else if (!strcmp(parameter, "destination")) {
647 struct in_addr ipaddr;
648
649 if (*p == '=') {
650 p++;
651 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 652 if (inet_aton(buf, &ipaddr))
1617ad97
FB
653 th->destination = ntohl(ipaddr.s_addr);
654 }
655 }
656 while (*p != ';' && *p != '\0' && *p != ',')
657 p++;
658 if (*p == ';')
659 p++;
660 }
661 if (*p == ',')
662 p++;
663
664 reply->nb_transports++;
665 }
666}
667
668void rtsp_parse_line(RTSPHeader *reply, const char *buf)
669{
670 const char *p;
671
672 /* NOTE: we do case independent match for broken servers */
673 p = buf;
f7d78f36 674 if (av_stristart(p, "Session:", &p)) {
1617ad97 675 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 676 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 677 reply->content_length = strtol(p, NULL, 10);
f7d78f36 678 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 679 rtsp_parse_transport(reply, p);
f7d78f36 680 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 681 reply->seq = strtol(p, NULL, 10);
f7d78f36 682 } else if (av_stristart(p, "Range:", &p)) {
31693e00 683 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
684 } else if (av_stristart(p, "RealChallenge1:", &p)) {
685 skip_spaces(&p);
686 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
687 } else if (av_stristart(p, "Server:", &p)) {
688 skip_spaces(&p);
689 av_strlcpy(reply->server, p, sizeof(reply->server));
1617ad97
FB
690 }
691}
692
2a42b5c3
LS
693static int url_readbuf(URLContext *h, unsigned char *buf, int size)
694{
695 int ret, len;
696
697 len = 0;
698 while (len < size) {
699 ret = url_read(h, buf+len, size-len);
700 if (ret < 1)
701 return ret;
702 len += ret;
703 }
704 return len;
705}
706
b7b8fc34
FB
707/* skip a RTP/TCP interleaved packet */
708static void rtsp_skip_packet(AVFormatContext *s)
709{
710 RTSPState *rt = s->priv_data;
711 int ret, len, len1;
712 uint8_t buf[1024];
713
2a42b5c3 714 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
715 if (ret != 3)
716 return;
80fb8234 717 len = AV_RB16(buf + 1);
b7b8fc34
FB
718#ifdef DEBUG
719 printf("skipping RTP packet len=%d\n", len);
720#endif
721 /* skip payload */
722 while (len > 0) {
723 len1 = len;
724 if (len1 > sizeof(buf))
725 len1 = sizeof(buf);
2a42b5c3 726 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
727 if (ret != len1)
728 return;
729 len -= len1;
730 }
731}
1617ad97 732
115329f1
DB
733static void rtsp_send_cmd(AVFormatContext *s,
734 const char *cmd, RTSPHeader *reply,
1617ad97
FB
735 unsigned char **content_ptr)
736{
737 RTSPState *rt = s->priv_data;
738 char buf[4096], buf1[1024], *q;
739 unsigned char ch;
740 const char *p;
741 int content_length, line_count;
742 unsigned char *content = NULL;
743
744 memset(reply, 0, sizeof(RTSPHeader));
745
746 rt->seq++;
75e61b0e 747 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 748 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 749 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 750 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 751 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 752 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 753 }
75e61b0e 754 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
755#ifdef DEBUG
756 printf("Sending:\n%s--\n", buf);
757#endif
758 url_write(rt->rtsp_hd, buf, strlen(buf));
759
760 /* parse reply (XXX: use buffers) */
761 line_count = 0;
762 rt->last_reply[0] = '\0';
763 for(;;) {
764 q = buf;
765 for(;;) {
2a42b5c3 766 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
767 break;
768 if (ch == '\n')
769 break;
b7b8fc34
FB
770 if (ch == '$') {
771 /* XXX: only parse it if first char on line ? */
772 rtsp_skip_packet(s);
773 } else if (ch != '\r') {
1617ad97
FB
774 if ((q - buf) < sizeof(buf) - 1)
775 *q++ = ch;
776 }
777 }
778 *q = '\0';
779#ifdef DEBUG
780 printf("line='%s'\n", buf);
781#endif
782 /* test if last line */
783 if (buf[0] == '\0')
784 break;
785 p = buf;
786 if (line_count == 0) {
787 /* get reply code */
788 get_word(buf1, sizeof(buf1), &p);
789 get_word(buf1, sizeof(buf1), &p);
790 reply->status_code = atoi(buf1);
791 } else {
792 rtsp_parse_line(reply, p);
75e61b0e
MR
793 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
794 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
795 }
796 line_count++;
797 }
115329f1 798
1617ad97 799 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 800 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 801
1617ad97
FB
802 content_length = reply->content_length;
803 if (content_length > 0) {
804 /* leave some room for a trailing '\0' (useful for simple parsing) */
805 content = av_malloc(content_length + 1);
2a42b5c3 806 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
807 content[content_length] = '\0';
808 }
809 if (content_ptr)
810 *content_ptr = content;
e2e2e7dd
AB
811 else
812 av_free(content);
1617ad97
FB
813}
814
1617ad97 815
8b1ab7bf
FB
816/* close and free RTSP streams */
817static void rtsp_close_streams(RTSPState *rt)
818{
819 int i;
820 RTSPStream *rtsp_st;
821
822 for(i=0;i<rt->nb_rtsp_streams;i++) {
823 rtsp_st = rt->rtsp_streams[i];
824 if (rtsp_st) {
accc248f
RB
825 if (rtsp_st->tx_ctx) {
826 if (rt->transport == RTSP_TRANSPORT_RDT)
827 ff_rdt_parse_close(rtsp_st->tx_ctx);
828 else
5c918b27 829 rtp_parse_close(rtsp_st->tx_ctx);
accc248f 830 }
8b1ab7bf
FB
831 if (rtsp_st->rtp_handle)
832 url_close(rtsp_st->rtp_handle);
4934884a
RM
833 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
834 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 835 }
8b1ab7bf
FB
836 }
837 av_free(rt->rtsp_streams);
838}
839
ee0cb67f
RB
840static int
841rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
842{
accc248f 843 RTSPState *rt = s->priv_data;
ee0cb67f
RB
844 AVStream *st = NULL;
845
a6789dca
RB
846 /* open the RTP context */
847 if (rtsp_st->stream_index >= 0)
848 st = s->streams[rtsp_st->stream_index];
849 if (!st)
850 s->ctx_flags |= AVFMTCTX_NOHEADER;
accc248f
RB
851
852 if (rt->transport == RTSP_TRANSPORT_RDT)
e0d1eabf 853 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
accc248f
RB
854 rtsp_st->dynamic_protocol_context,
855 rtsp_st->dynamic_handler);
856 else
5c918b27
RB
857 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
858 rtsp_st->sdp_payload_type,
859 &rtsp_st->rtp_payload_data);
a6789dca 860
5465b0d4 861 if (!rtsp_st->tx_ctx) {
a6789dca 862 return AVERROR(ENOMEM);
accc248f 863 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
a6789dca 864 if(rtsp_st->dynamic_handler) {
5465b0d4 865 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
99a1d191
RB
866 rtsp_st->dynamic_protocol_context,
867 rtsp_st->dynamic_handler);
ee0cb67f 868 }
a6789dca 869 }
ee0cb67f
RB
870
871 return 0;
872}
873
53620bba
RB
874/**
875 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
876 */
877static int
e9dea59f 878make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 879 int lower_transport, const char *real_challenge)
1617ad97
FB
880{
881 RTSPState *rt = s->priv_data;
53620bba 882 int j, i, err;
1617ad97 883 RTSPStream *rtsp_st;
53620bba
RB
884 RTSPHeader reply1, *reply = &reply1;
885 char cmd[2048];
e9dea59f
RB
886 const char *trans_pref;
887
119b4668 888 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
889 trans_pref = "x-pn-tng";
890 else
891 trans_pref = "RTP/AVP";
115329f1 892
1617ad97
FB
893 /* for each stream, make the setup request */
894 /* XXX: we assume the same server is used for the control of each
895 RTSP stream */
d1ccf0e0
RD
896
897 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
898 char transport[2048];
899
8b1ab7bf 900 rtsp_st = rt->rtsp_streams[i];
1617ad97 901
1617ad97 902 /* RTP/UDP */
90abbdba 903 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 904 char buf[256];
85fb7b34
FB
905
906 /* first try in specified port range */
d1ccf0e0
RD
907 if (RTSP_RTP_PORT_MIN != 0) {
908 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 909 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 910 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 911 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 912 goto rtp_opened;
d1ccf0e0 913 }
85fb7b34 914 }
1617ad97 915 }
85fb7b34 916
d1ccf0e0
RD
917/* then try on any port
918** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
919** err = AVERROR_INVALIDDATA;
920** goto fail;
921** }
922*/
85fb7b34
FB
923
924 rtp_opened:
8b1ab7bf 925 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 926 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
927 "%s/UDP;", trans_pref);
928 if (rt->server_type != RTSP_SERVER_REAL)
929 av_strlcat(transport, "unicast;", sizeof(transport));
930 av_strlcatf(transport, sizeof(transport),
931 "client_port=%d", port);
119b4668 932 if (rt->transport == RTSP_TRANSPORT_RTP)
e9dea59f 933 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
934 }
935
936 /* RTP/TCP */
90abbdba 937 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
0ad306bc 938 snprintf(transport, sizeof(transport) - 1,
e9dea59f 939 "%s/TCP", trans_pref);
1617ad97
FB
940 }
941
90abbdba 942 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 943 snprintf(transport, sizeof(transport) - 1,
e9dea59f 944 "%s/UDP;multicast", trans_pref);
1617ad97 945 }
2e889ae4 946 if (rt->server_type == RTSP_SERVER_REAL)
e9dea59f 947 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 948 snprintf(cmd, sizeof(cmd),
b6892136
FB
949 "SETUP %s RTSP/1.0\r\n"
950 "Transport: %s\r\n",
1617ad97 951 rtsp_st->control_url, transport);
2e889ae4 952 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
953 char real_res[41], real_csum[9];
954 ff_rdt_calc_response_and_checksum(real_res, real_csum,
955 real_challenge);
956 av_strlcatf(cmd, sizeof(cmd),
957 "If-Match: %s\r\n"
958 "RealChallenge2: %s, sd=%s\r\n",
959 rt->session_id, real_res, real_csum);
960 }
1617ad97 961 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
962 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
963 err = 1;
964 goto fail;
7e6ca34f
RB
965 } else if (reply->status_code != RTSP_STATUS_OK ||
966 reply->nb_transports != 1) {
1617ad97
FB
967 err = AVERROR_INVALIDDATA;
968 goto fail;
969 }
970
971 /* XXX: same protocol for all streams is required */
972 if (i > 0) {
119b4668
RB
973 if (reply->transports[0].lower_transport != rt->lower_transport ||
974 reply->transports[0].transport != rt->transport) {
1617ad97
FB
975 err = AVERROR_INVALIDDATA;
976 goto fail;
977 }
978 } else {
90abbdba 979 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 980 rt->transport = reply->transports[0].transport;
1617ad97
FB
981 }
982
983 /* close RTP connection if not choosen */
90abbdba
RB
984 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
985 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
986 url_close(rtsp_st->rtp_handle);
987 rtsp_st->rtp_handle = NULL;
1617ad97
FB
988 }
989
90abbdba
RB
990 switch(reply->transports[0].lower_transport) {
991 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
992 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
993 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
994 break;
115329f1 995
90abbdba 996 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
997 {
998 char url[1024];
115329f1 999
1617ad97 1000 /* XXX: also use address if specified */
115329f1 1001 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1002 host, reply->transports[0].server_port_min);
8b1ab7bf 1003 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1004 err = AVERROR_INVALIDDATA;
1005 goto fail;
1006 }
1007 }
1008 break;
90abbdba 1009 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1010 {
1011 char url[1024];
d02678ec 1012 struct in_addr in;
1617ad97 1013
d02678ec 1014 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1015 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1016 inet_ntoa(in),
1017 reply->transports[0].port_min,
1018 reply->transports[0].ttl);
dbf30963 1019 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1020 err = AVERROR_INVALIDDATA;
1021 goto fail;
1022 }
1023 }
1024 break;
1025 }
d1ccf0e0 1026
ee0cb67f 1027 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1028 goto fail;
1617ad97
FB
1029 }
1030
2e889ae4 1031 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1032 rt->need_subscription = 1;
1033
53620bba
RB
1034 return 0;
1035
1036fail:
8a8754d8
RB
1037 for (i=0; i<rt->nb_rtsp_streams; i++) {
1038 if (rt->rtsp_streams[i]->rtp_handle) {
1039 url_close(rt->rtsp_streams[i]->rtp_handle);
1040 rt->rtsp_streams[i]->rtp_handle = NULL;
1041 }
1042 }
53620bba
RB
1043 return err;
1044}
1045
1046static int rtsp_read_header(AVFormatContext *s,
1047 AVFormatParameters *ap)
1048{
1049 RTSPState *rt = s->priv_data;
1050 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1051 URLContext *rtsp_hd;
1052 int port, ret, err;
1053 RTSPHeader reply1, *reply = &reply1;
1054 unsigned char *content = NULL;
90abbdba 1055 int lower_transport_mask = 0;
1cf151e9 1056 char real_challenge[64];
53620bba
RB
1057
1058 /* extract hostname and port */
1059 url_split(NULL, 0, NULL, 0,
1060 host, sizeof(host), &port, path, sizeof(path), s->filename);
1061 if (port < 0)
1062 port = RTSP_DEFAULT_PORT;
1063
1064 /* search for options */
1065 option_list = strchr(path, '?');
1066 if (option_list) {
1067 /* remove the options from the path */
1068 *option_list++ = 0;
1069 while(option_list) {
1070 /* move the option pointer */
1071 option = option_list;
1072 option_list = strchr(option_list, '&');
1073 if (option_list)
1074 *(option_list++) = 0;
1075 /* handle the options */
1076 if (strcmp(option, "udp") == 0)
90abbdba 1077 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1078 else if (strcmp(option, "multicast") == 0)
90abbdba 1079 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1080 else if (strcmp(option, "tcp") == 0)
90abbdba 1081 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1082 }
1083 }
1084
90abbdba
RB
1085 if (!lower_transport_mask)
1086 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
53620bba
RB
1087
1088 /* open the tcp connexion */
1089 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1090 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1091 return AVERROR(EIO);
1092 rt->rtsp_hd = rtsp_hd;
1093 rt->seq = 0;
1094
1cf151e9
RB
1095 /* request options supported by the server; this also detects server type */
1096 for (rt->server_type = RTSP_SERVER_RTP;;) {
1097 snprintf(cmd, sizeof(cmd),
1098 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1099 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1100 av_strlcat(cmd,
1101 /**
1102 * The following entries are required for proper
1103 * streaming from a Realmedia server. They are
1104 * interdependent in some way although we currently
1105 * don't quite understand how. Values were copied
1106 * from mplayer SVN r23589.
1107 * @param CompanyID is a 16-byte ID in base64
1108 * @param ClientChallenge is a 16-byte ID in hex
1109 */
1110 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1111 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1112 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1113 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1114 sizeof(cmd));
1115 rtsp_send_cmd(s, cmd, reply, NULL);
1116 if (reply->status_code != RTSP_STATUS_OK) {
1117 err = AVERROR_INVALIDDATA;
1118 goto fail;
1119 }
1120
1121 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1122 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1123 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1124 continue;
7a86bafa
RB
1125 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1126 rt->server_type = RTSP_SERVER_WMS;
2e889ae4 1127 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1128 strcpy(real_challenge, reply->real_challenge);
1129 }
1130 break;
1131 }
1132
53620bba
RB
1133 /* describe the stream */
1134 snprintf(cmd, sizeof(cmd),
1135 "DESCRIBE %s RTSP/1.0\r\n"
1136 "Accept: application/sdp\r\n",
1137 s->filename);
2e889ae4 1138 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1139 /**
1140 * The Require: attribute is needed for proper streaming from
1141 * Realmedia servers.
1142 */
1143 av_strlcat(cmd,
1144 "Require: com.real.retain-entity-for-setup\r\n",
1145 sizeof(cmd));
1146 }
53620bba
RB
1147 rtsp_send_cmd(s, cmd, reply, &content);
1148 if (!content) {
1149 err = AVERROR_INVALIDDATA;
1150 goto fail;
1151 }
1152 if (reply->status_code != RTSP_STATUS_OK) {
1153 err = AVERROR_INVALIDDATA;
1154 goto fail;
1155 }
1156
1157 /* now we got the SDP description, we parse it */
1158 ret = sdp_parse(s, (const char *)content);
1159 av_freep(&content);
1160 if (ret < 0) {
1161 err = AVERROR_INVALIDDATA;
1162 goto fail;
1163 }
1164
8a8754d8 1165 do {
90abbdba 1166 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1167
90abbdba 1168 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1169 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1170 real_challenge : NULL);
8a8754d8 1171 if (err < 0)
7e6ca34f 1172 goto fail;
90abbdba
RB
1173 lower_transport_mask &= ~(1 << lower_transport);
1174 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1175 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1176 goto fail;
1177 }
1178 } while (err);
53620bba 1179
ff762d6e
FB
1180 rt->state = RTSP_STATE_IDLE;
1181 rt->seek_timestamp = 0; /* default is to start stream at position
1182 zero */
c04c3282 1183 if (ap->initial_pause) {
ff762d6e
FB
1184 /* do not start immediately */
1185 } else {
1186 if (rtsp_read_play(s) < 0) {
1187 err = AVERROR_INVALIDDATA;
1617ad97
FB
1188 goto fail;
1189 }
1190 }
1617ad97
FB
1191 return 0;
1192 fail:
8b1ab7bf 1193 rtsp_close_streams(rt);
1617ad97
FB
1194 av_freep(&content);
1195 url_close(rt->rtsp_hd);
1196 return err;
1197}
1198
8b1ab7bf
FB
1199static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1200 uint8_t *buf, int buf_size)
1617ad97
FB
1201{
1202 RTSPState *rt = s->priv_data;
b6892136 1203 int id, len, i, ret;
1617ad97 1204 RTSPStream *rtsp_st;
1617ad97 1205
b6892136
FB
1206#ifdef DEBUG_RTP_TCP
1207 printf("tcp_read_packet:\n");
1208#endif
1617ad97
FB
1209 redo:
1210 for(;;) {
2a42b5c3 1211 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1212#ifdef DEBUG_RTP_TCP
1213 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1214#endif
1215 if (ret != 1)
8b1ab7bf 1216 return -1;
b6892136 1217 if (buf[0] == '$')
1617ad97
FB
1218 break;
1219 }
2a42b5c3 1220 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1221 if (ret != 3)
8b1ab7bf 1222 return -1;
b6892136 1223 id = buf[0];
80fb8234 1224 len = AV_RB16(buf + 1);
b6892136
FB
1225#ifdef DEBUG_RTP_TCP
1226 printf("id=%d len=%d\n", id, len);
1227#endif
8b1ab7bf 1228 if (len > buf_size || len < 12)
1617ad97
FB
1229 goto redo;
1230 /* get the data */
2a42b5c3 1231 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1232 if (ret != len)
8b1ab7bf 1233 return -1;
985b05d3 1234 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1235 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1236 return -1;
115329f1 1237
1617ad97 1238 /* find the matching stream */
8b1ab7bf
FB
1239 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1240 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1241 if (id >= rtsp_st->interleaved_min &&
1242 id <= rtsp_st->interleaved_max)
1617ad97
FB
1243 goto found;
1244 }
1245 goto redo;
1246 found:
8b1ab7bf
FB
1247 *prtsp_st = rtsp_st;
1248 return len;
1617ad97
FB
1249}
1250
115329f1 1251static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1252 uint8_t *buf, int buf_size)
1617ad97 1253{
8b1ab7bf 1254 RTSPState *rt = s->priv_data;
1617ad97
FB
1255 RTSPStream *rtsp_st;
1256 fd_set rfds;
1257 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1258 struct timeval tv;
1259
1260 for(;;) {
b7b8fc34 1261 if (url_interrupt_cb())
a960a1e0 1262 return AVERROR(EINTR);
1617ad97
FB
1263 FD_ZERO(&rfds);
1264 fd_max = -1;
8b1ab7bf
FB
1265 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1266 rtsp_st = rt->rtsp_streams[i];
1617ad97 1267 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1268 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1269 if (fd1 > fd_max)
1270 fd_max = fd1;
1271 FD_SET(fd1, &rfds);
1272 }
1617ad97 1273 tv.tv_sec = 0;
b7b8fc34 1274 tv.tv_usec = 100 * 1000;
1617ad97
FB
1275 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1276 if (n > 0) {
8b1ab7bf
FB
1277 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1278 rtsp_st = rt->rtsp_streams[i];
1279 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1280 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1281 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1282 if (ret > 0) {
1283 *prtsp_st = rtsp_st;
1617ad97
FB
1284 return ret;
1285 }
1286 }
1287 }
1288 }
1289 }
1290}
1291
1292static int rtsp_read_packet(AVFormatContext *s,
1293 AVPacket *pkt)
1294{
1295 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1296 RTSPStream *rtsp_st;
1297 int ret, len;
e49906c3 1298 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
8b1ab7bf 1299
572c6a38 1300 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b
RB
1301 int i;
1302 RTSPHeader reply1, *reply = &reply1;
572c6a38 1303 enum AVDiscard cache[MAX_STREAMS];
1256d16b
RB
1304 char cmd[1024];
1305
572c6a38
RB
1306 for (i = 0; i < s->nb_streams; i++)
1307 cache[i] = s->streams[i]->discard;
1308
1309 if (!rt->need_subscription) {
1310 if (memcmp (cache, rt->real_setup_cache,
1311 sizeof(enum AVDiscard) * s->nb_streams)) {
1312 av_strlcatf(cmd, sizeof(cmd),
1313 "SET_PARAMETER %s RTSP/1.0\r\n"
1314 "Unsubscribe: %s\r\n",
1315 s->filename, rt->last_subscription);
1316 rtsp_send_cmd(s, cmd, reply, NULL);
1317 if (reply->status_code != RTSP_STATUS_OK)
1318 return AVERROR_INVALIDDATA;
1319 rt->need_subscription = 1;
1320 }
1256d16b 1321 }
1256d16b 1322
572c6a38
RB
1323 if (rt->need_subscription) {
1324 int r, rule_nr, first = 1;
1325
1326 memcpy(rt->real_setup_cache, cache,
1327 sizeof(enum AVDiscard) * s->nb_streams);
1328 rt->last_subscription[0] = 0;
1329
1330 snprintf(cmd, sizeof(cmd),
1331 "SET_PARAMETER %s RTSP/1.0\r\n"
1332 "Subscribe: ",
1333 s->filename);
1334 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1335 rule_nr = 0;
1336 for (r = 0; r < s->nb_streams; r++) {
1337 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1338 if (s->streams[r]->discard != AVDISCARD_ALL) {
1339 if (!first)
1340 av_strlcat(rt->last_subscription, ",",
1341 sizeof(rt->last_subscription));
1342 ff_rdt_subscribe_rule(
1343 rt->last_subscription,
1344 sizeof(rt->last_subscription), i, rule_nr);
1345 first = 0;
1346 }
1347 rule_nr++;
1348 }
1349 }
1350 }
1351 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1352 rtsp_send_cmd(s, cmd, reply, NULL);
1353 if (reply->status_code != RTSP_STATUS_OK)
1354 return AVERROR_INVALIDDATA;
1355 rt->need_subscription = 0;
1356
1357 if (rt->state == RTSP_STATE_PLAYING)
1358 rtsp_read_play (s);
1359 }
1256d16b
RB
1360 }
1361
8b1ab7bf 1362 /* get next frames from the same RTP packet */
5465b0d4 1363 if (rt->cur_tx) {
119b4668 1364 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1365 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
4fce284c 1366 else
5465b0d4 1367 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
8b1ab7bf 1368 if (ret == 0) {
5465b0d4 1369 rt->cur_tx = NULL;
8b1ab7bf
FB
1370 return 0;
1371 } else if (ret == 1) {
1372 return 0;
1373 } else {
5465b0d4 1374 rt->cur_tx = NULL;
8b1ab7bf
FB
1375 }
1376 }
1617ad97 1377
8b1ab7bf
FB
1378 /* read next RTP packet */
1379 redo:
90abbdba 1380 switch(rt->lower_transport) {
1617ad97 1381 default:
90abbdba 1382 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1383 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1384 break;
90abbdba
RB
1385 case RTSP_LOWER_TRANSPORT_UDP:
1386 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1387 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
6ff1f615 1388 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
5465b0d4 1389 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1617ad97
FB
1390 break;
1391 }
8b1ab7bf 1392 if (len < 0)
489b0d4d 1393 return len;
119b4668 1394 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1395 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
4fce284c 1396 else
5465b0d4 1397 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
8b1ab7bf
FB
1398 if (ret < 0)
1399 goto redo;
1400 if (ret == 1) {
1401 /* more packets may follow, so we save the RTP context */
5465b0d4 1402 rt->cur_tx = rtsp_st->tx_ctx;
8b1ab7bf
FB
1403 }
1404 return 0;
1617ad97
FB
1405}
1406
ff762d6e 1407static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1408{
ff762d6e 1409 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1410 RTSPHeader reply1, *reply = &reply1;
1411 char cmd[1024];
1412
bc874dae 1413 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1414
2e889ae4 1415 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1416 if (rt->state == RTSP_STATE_PAUSED) {
1417 snprintf(cmd, sizeof(cmd),
1418 "PLAY %s RTSP/1.0\r\n",
1419 s->filename);
1420 } else {
1421 snprintf(cmd, sizeof(cmd),
1422 "PLAY %s RTSP/1.0\r\n"
1423 "Range: npt=%0.3f-\r\n",
1424 s->filename,
1425 (double)rt->seek_timestamp / AV_TIME_BASE);
1426 }
1427 rtsp_send_cmd(s, cmd, reply, NULL);
1428 if (reply->status_code != RTSP_STATUS_OK) {
1429 return -1;
1430 }
1256d16b 1431 }
5f86057f
RB
1432 rt->state = RTSP_STATE_PLAYING;
1433 return 0;
b7b8fc34
FB
1434}
1435
ff762d6e
FB
1436/* pause the stream */
1437static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1438{
ff762d6e 1439 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1440 RTSPHeader reply1, *reply = &reply1;
1441 char cmd[1024];
1442
b7b8fc34 1443 rt = s->priv_data;
115329f1 1444
ff762d6e
FB
1445 if (rt->state != RTSP_STATE_PLAYING)
1446 return 0;
2e889ae4 1447 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1448 snprintf(cmd, sizeof(cmd),
1449 "PAUSE %s RTSP/1.0\r\n",
1450 s->filename);
1451 rtsp_send_cmd(s, cmd, reply, NULL);
1452 if (reply->status_code != RTSP_STATUS_OK) {
1453 return -1;
1454 }
1256d16b 1455 }
5f86057f
RB
1456 rt->state = RTSP_STATE_PAUSED;
1457 return 0;
b7b8fc34
FB
1458}
1459
115329f1 1460static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1461 int64_t timestamp, int flags)
ff762d6e
FB
1462{
1463 RTSPState *rt = s->priv_data;
115329f1 1464
50755217 1465 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1466 switch(rt->state) {
1467 default:
1468 case RTSP_STATE_IDLE:
1469 break;
1470 case RTSP_STATE_PLAYING:
1471 if (rtsp_read_play(s) != 0)
1472 return -1;
1473 break;
1474 case RTSP_STATE_PAUSED:
1475 rt->state = RTSP_STATE_IDLE;
1476 break;
1477 }
1478 return 0;
1479}
1480
1617ad97
FB
1481static int rtsp_read_close(AVFormatContext *s)
1482{
1483 RTSPState *rt = s->priv_data;
1617ad97 1484 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1485 char cmd[1024];
1486
b6892136 1487#if 0
1617ad97 1488 /* NOTE: it is valid to flush the buffer here */
90abbdba 1489 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1490 url_fclose(&rt->rtsp_gb);
1491 }
b6892136 1492#endif
115329f1 1493 snprintf(cmd, sizeof(cmd),
b6892136 1494 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1495 s->filename);
1496 rtsp_send_cmd(s, cmd, reply, NULL);
1497
8b1ab7bf 1498 rtsp_close_streams(rt);
1617ad97
FB
1499 url_close(rt->rtsp_hd);
1500 return 0;
1501}
1502
96862926 1503#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1504AVInputFormat rtsp_demuxer = {
1617ad97 1505 "rtsp",
bde15e74 1506 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1507 sizeof(RTSPState),
1508 rtsp_probe,
1509 rtsp_read_header,
1510 rtsp_read_packet,
1511 rtsp_read_close,
ff762d6e 1512 rtsp_read_seek,
bb76a117 1513 .flags = AVFMT_NOFILE,
ff762d6e
FB
1514 .read_play = rtsp_read_play,
1515 .read_pause = rtsp_read_pause,
1617ad97 1516};
96862926 1517#endif
1617ad97 1518
cb1fdc61 1519static int sdp_probe(AVProbeData *p1)
93ced3e8 1520{
0e1ceacd 1521 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1522
1523 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1524 while (p < p_end && *p != '\0') {
f7d78f36 1525 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1526 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1527
1528 while(p < p_end - 1 && *p != '\n') p++;
1529 if (++p >= p_end)
cb1fdc61 1530 break;
cb1fdc61
FB
1531 if (*p == '\r')
1532 p++;
1533 }
93ced3e8
FB
1534 return 0;
1535}
1536
1537#define SDP_MAX_SIZE 8192
1538
1539static int sdp_read_header(AVFormatContext *s,
1540 AVFormatParameters *ap)
1541{
8b1ab7bf 1542 RTSPState *rt = s->priv_data;
93ced3e8
FB
1543 RTSPStream *rtsp_st;
1544 int size, i, err;
1545 char *content;
1546 char url[1024];
1547
1548 /* read the whole sdp file */
1549 /* XXX: better loading */
1550 content = av_malloc(SDP_MAX_SIZE);
899681cd 1551 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1552 if (size <= 0) {
1553 av_free(content);
1554 return AVERROR_INVALIDDATA;
1555 }
1556 content[size] ='\0';
1557
1558 sdp_parse(s, content);
1559 av_free(content);
1560
1561 /* open each RTP stream */
8b1ab7bf
FB
1562 for(i=0;i<rt->nb_rtsp_streams;i++) {
1563 rtsp_st = rt->rtsp_streams[i];
115329f1 1564
d2bf42be 1565 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1566 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1567 rtsp_st->sdp_port,
d2bf42be 1568 rtsp_st->sdp_port,
93ced3e8 1569 rtsp_st->sdp_ttl);
dbf30963 1570 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1571 err = AVERROR_INVALIDDATA;
1572 goto fail;
1573 }
ee0cb67f 1574 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1575 goto fail;
93ced3e8
FB
1576 }
1577 return 0;
1578 fail:
8b1ab7bf 1579 rtsp_close_streams(rt);
93ced3e8
FB
1580 return err;
1581}
1582
1583static int sdp_read_packet(AVFormatContext *s,
1584 AVPacket *pkt)
1585{
8b1ab7bf 1586 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1587}
1588
1589static int sdp_read_close(AVFormatContext *s)
1590{
8b1ab7bf
FB
1591 RTSPState *rt = s->priv_data;
1592 rtsp_close_streams(rt);
93ced3e8
FB
1593 return 0;
1594}
1595
ff70e601
MR
1596#ifdef CONFIG_SDP_DEMUXER
1597AVInputFormat sdp_demuxer = {
93ced3e8 1598 "sdp",
bde15e74 1599 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1600 sizeof(RTSPState),
1601 sdp_probe,
1602 sdp_read_header,
1603 sdp_read_packet,
1604 sdp_read_close,
1605};
ff70e601 1606#endif
93ced3e8 1607
e7047005 1608#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1609/* dummy redirector format (used directly in av_open_input_file now) */
1610static int redir_probe(AVProbeData *pd)
1611{
1612 const char *p;
1613 p = pd->buf;
1614 while (redir_isspace(*p))
1615 p++;
f7d78f36
MR
1616 if (av_strstart(p, "http://", NULL) ||
1617 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1618 return AVPROBE_SCORE_MAX;
1619 return 0;
1620}
1621
e8acf0ed 1622static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1623{
1624 char buf[4096], *q;
1625 int c;
1626 AVFormatContext *ic = NULL;
e8acf0ed 1627 ByteIOContext *f = s->pb;
1617ad97
FB
1628
1629 /* parse each URL and try to open it */
1630 c = url_fgetc(f);
1631 while (c != URL_EOF) {
1632 /* skip spaces */
1633 for(;;) {
1634 if (!redir_isspace(c))
1635 break;
1636 c = url_fgetc(f);
1637 }
1638 if (c == URL_EOF)
1639 break;
1640 /* record url */
1641 q = buf;
1642 for(;;) {
1643 if (c == URL_EOF || redir_isspace(c))
1644 break;
1645 if ((q - buf) < sizeof(buf) - 1)
1646 *q++ = c;
1647 c = url_fgetc(f);
1648 }
1649 *q = '\0';
1650 //printf("URL='%s'\n", buf);
1651 /* try to open the media file */
1652 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1653 break;
1654 }
1617ad97 1655 if (!ic)
6f3e0b21 1656 return AVERROR(EIO);
e8acf0ed
LA
1657
1658 *s = *ic;
1659 url_fclose(f);
1660
1661 return 0;
1617ad97
FB
1662}
1663
d2a067d1 1664AVInputFormat redir_demuxer = {
1617ad97 1665 "redir",
bde15e74 1666 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1667 0,
1668 redir_probe,
e8acf0ed 1669 redir_read_header,
1617ad97
FB
1670 NULL,
1671 NULL,
1672};
e7047005 1673#endif