Ensure the first audio stream is selected as the default stream
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
1617ad97
FB
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,
1617ad97
FB
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
DB
21
22#include "libavutil/avstring.h"
1617ad97
FB
23#include "avformat.h"
24
db0ed93e 25#include <sys/time.h>
438fcb75 26#include <unistd.h> /* for select() prototype */
42572ef5 27#include "network.h"
c971ff19 28#include "rtsp.h"
1617ad97 29
4934884a
RM
30#include "rtp_internal.h"
31
1617ad97 32//#define DEBUG
b6892136 33//#define DEBUG_RTP_TCP
1617ad97 34
ff762d6e
FB
35enum RTSPClientState {
36 RTSP_STATE_IDLE,
37 RTSP_STATE_PLAYING,
38 RTSP_STATE_PAUSED,
39};
40
1617ad97
FB
41typedef struct RTSPState {
42 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
8b1ab7bf
FB
43 int nb_rtsp_streams;
44 struct RTSPStream **rtsp_streams;
115329f1 45
ff762d6e
FB
46 enum RTSPClientState state;
47 int64_t seek_timestamp;
115329f1 48
b6892136
FB
49 /* XXX: currently we use unbuffered input */
50 // ByteIOContext rtsp_gb;
1617ad97
FB
51 int seq; /* RTSP command sequence number */
52 char session_id[512];
53 enum RTSPProtocol protocol;
54 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 55 RTPDemuxContext *cur_rtp;
1617ad97
FB
56} RTSPState;
57
58typedef struct RTSPStream {
8b1ab7bf
FB
59 URLContext *rtp_handle; /* RTP stream handle */
60 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 61
8b1ab7bf 62 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 63 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
93ced3e8
FB
64 char control_url[1024]; /* url for this stream (from SDP) */
65
66 int sdp_port; /* port (from SDP content - not used in RTSP) */
67 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
68 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
69 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 70 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
4934884a
RM
71
72 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
73 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
1617ad97
FB
74} RTSPStream;
75
ff762d6e
FB
76static int rtsp_read_play(AVFormatContext *s);
77
1617ad97
FB
78/* XXX: currently, the only way to change the protocols consists in
79 changing this variable */
1617ad97 80
c482500f 81#if LIBAVFORMAT_VERSION_INT < (53 << 16)
d1ccf0e0 82int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
c482500f 83#endif
85fb7b34 84
1617ad97
FB
85static int rtsp_probe(AVProbeData *p)
86{
f7d78f36 87 if (av_strstart(p->filename, "rtsp:", NULL))
1617ad97
FB
88 return AVPROBE_SCORE_MAX;
89 return 0;
90}
91
92static int redir_isspace(int c)
93{
ccd425e7 94 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
1617ad97
FB
95}
96
97static void skip_spaces(const char **pp)
98{
99 const char *p;
100 p = *pp;
101 while (redir_isspace(*p))
102 p++;
103 *pp = p;
104}
105
115329f1 106static void get_word_sep(char *buf, int buf_size, const char *sep,
1617ad97
FB
107 const char **pp)
108{
109 const char *p;
110 char *q;
111
112 p = *pp;
d1ccf0e0
RD
113 if (*p == '/')
114 p++;
1617ad97
FB
115 skip_spaces(&p);
116 q = buf;
117 while (!strchr(sep, *p) && *p != '\0') {
118 if ((q - buf) < buf_size - 1)
119 *q++ = *p;
120 p++;
121 }
122 if (buf_size > 0)
123 *q = '\0';
124 *pp = p;
125}
126
127static void get_word(char *buf, int buf_size, const char **pp)
128{
129 const char *p;
130 char *q;
131
132 p = *pp;
133 skip_spaces(&p);
134 q = buf;
135 while (!redir_isspace(*p) && *p != '\0') {
136 if ((q - buf) < buf_size - 1)
137 *q++ = *p;
138 p++;
139 }
140 if (buf_size > 0)
141 *q = '\0';
142 *pp = p;
143}
144
93ced3e8
FB
145/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
146 params>] */
4934884a 147static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
93ced3e8
FB
148{
149 char buf[256];
d1ccf0e0
RD
150 int i;
151 AVCodec *c;
7b49ce2e 152 const char *c_name;
93ced3e8 153
d1ccf0e0
RD
154 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
155 see if we can handle this kind of payload */
93ced3e8 156 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 157 if (payload_type >= RTP_PT_PRIVATE) {
4934884a
RM
158 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
159 while(handler) {
160 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
161 codec->codec_id = handler->codec_id;
162 rtsp_st->dynamic_handler= handler;
163 if(handler->open) {
164 rtsp_st->dynamic_protocol_context= handler->open();
165 }
d1ccf0e0
RD
166 break;
167 }
4934884a
RM
168 handler= handler->next;
169 }
93ced3e8 170 } else {
d1ccf0e0
RD
171 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
172 /* search into AVRtpPayloadTypes[] */
7ed19d7f 173 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
174 }
175
176 c = avcodec_find_decoder(codec->codec_id);
177 if (c && c->name)
7b49ce2e 178 c_name = c->name;
d1ccf0e0
RD
179 else
180 c_name = (char *)NULL;
181
182 if (c_name) {
183 get_word_sep(buf, sizeof(buf), "/", &p);
184 i = atoi(buf);
185 switch (codec->codec_type) {
186 case CODEC_TYPE_AUDIO:
187 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
188 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
189 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
190 if (i > 0) {
191 codec->sample_rate = i;
192 get_word_sep(buf, sizeof(buf), "/", &p);
193 i = atoi(buf);
194 if (i > 0)
195 codec->channels = i;
d0deedcb
RM
196 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
197 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
d1ccf0e0
RD
198 }
199 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
200 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
201 break;
202 case CODEC_TYPE_VIDEO:
203 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
204 break;
205 default:
206 break;
207 }
208 return 0;
93ced3e8 209 }
d1ccf0e0
RD
210
211 return -1;
93ced3e8
FB
212}
213
214/* return the length and optionnaly the data */
215static int hex_to_data(uint8_t *data, const char *p)
216{
217 int c, len, v;
218
219 len = 0;
220 v = 1;
221 for(;;) {
222 skip_spaces(&p);
223 if (p == '\0')
224 break;
225 c = toupper((unsigned char)*p++);
226 if (c >= '0' && c <= '9')
227 c = c - '0';
228 else if (c >= 'A' && c <= 'F')
229 c = c - 'A' + 10;
230 else
231 break;
232 v = (v << 4) | c;
233 if (v & 0x100) {
234 if (data)
235 data[len] = v;
236 len++;
237 v = 1;
238 }
239 }
240 return len;
241}
242
d1ccf0e0
RD
243static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
244{
245 switch (codec->codec_id) {
246 case CODEC_ID_MPEG4:
cbee7a69 247 case CODEC_ID_AAC:
d1ccf0e0
RD
248 if (!strcmp(attr, "config")) {
249 /* decode the hexa encoded parameter */
250 int len = hex_to_data(NULL, value);
251 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
252 if (!codec->extradata)
253 return;
254 codec->extradata_size = len;
255 hex_to_data(codec->extradata, value);
256 }
257 break;
258 default:
259 break;
260 }
261 return;
262}
263
264typedef struct attrname_map
265{
7b49ce2e 266 const char *str;
d1ccf0e0
RD
267 uint16_t type;
268 uint32_t offset;
269} attrname_map_t;
270
271/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
272#define ATTR_NAME_TYPE_INT 0
273#define ATTR_NAME_TYPE_STR 1
274static attrname_map_t attr_names[]=
275{
276 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
277 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
278 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
279 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
280 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
281 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
282 {NULL, -1, -1},
283};
284
d0deedcb
RM
285/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
286* because it is used in rtp_h264.c, which is forthcoming.
287*/
288int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
289{
290 skip_spaces(p);
291 if(**p)
292 {
293 get_word_sep(attr, attr_size, "=", p);
294 if (**p == '=')
295 (*p)++;
296 get_word_sep(value, value_size, ";", p);
297 if (**p == ';')
298 (*p)++;
299 return 1;
300 }
301 return 0;
302}
303
d1ccf0e0
RD
304/* parse a SDP line and save stream attributes */
305static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
306{
307 char attr[256];
308 char value[4096];
d1ccf0e0
RD
309 int i;
310
311 RTSPStream *rtsp_st = st->priv_data;
01f4895c 312 AVCodecContext *codec = st->codec;
d1ccf0e0 313 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
314
315 /* loop on each attribute */
1ad20f96
RM
316 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
317 {
bb270c08 318 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
319 sdp_parse_fmtp_config(codec, attr, value);
320 /* Looking for a known attribute */
321 for (i = 0; attr_names[i].str; ++i) {
322 if (!strcasecmp(attr, attr_names[i].str)) {
323 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
324 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
325 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
326 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 327 }
93ced3e8 328 }
93ced3e8
FB
329 }
330}
331
31693e00
RM
332/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
333 * and end time.
334 * Used for seeking in the rtp stream.
335 */
336static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
337{
338 char buf[256];
339
340 skip_spaces(&p);
f7d78f36 341 if (!av_stristart(p, "npt=", &p))
31693e00
RM
342 return;
343
344 *start = AV_NOPTS_VALUE;
345 *end = AV_NOPTS_VALUE;
346
347 get_word_sep(buf, sizeof(buf), "-", &p);
348 *start = parse_date(buf, 1);
349 if (*p == '-') {
350 p++;
351 get_word_sep(buf, sizeof(buf), "-", &p);
352 *end = parse_date(buf, 1);
353 }
354// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
355// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
356}
357
93ced3e8
FB
358typedef struct SDPParseState {
359 /* SDP only */
360 struct in_addr default_ip;
361 int default_ttl;
362} SDPParseState;
363
364static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
365 int letter, const char *buf)
366{
8b1ab7bf 367 RTSPState *rt = s->priv_data;
1617ad97
FB
368 char buf1[64], st_type[64];
369 const char *p;
93ced3e8 370 int codec_type, payload_type, i;
1617ad97
FB
371 AVStream *st;
372 RTSPStream *rtsp_st;
93ced3e8
FB
373 struct in_addr sdp_ip;
374 int ttl;
375
1617ad97
FB
376#ifdef DEBUG
377 printf("sdp: %c='%s'\n", letter, buf);
378#endif
379
380 p = buf;
381 switch(letter) {
93ced3e8
FB
382 case 'c':
383 get_word(buf1, sizeof(buf1), &p);
384 if (strcmp(buf1, "IN") != 0)
385 return;
386 get_word(buf1, sizeof(buf1), &p);
387 if (strcmp(buf1, "IP4") != 0)
388 return;
389 get_word_sep(buf1, sizeof(buf1), "/", &p);
390 if (inet_aton(buf1, &sdp_ip) == 0)
391 return;
392 ttl = 16;
393 if (*p == '/') {
394 p++;
395 get_word_sep(buf1, sizeof(buf1), "/", &p);
396 ttl = atoi(buf1);
397 }
398 if (s->nb_streams == 0) {
399 s1->default_ip = sdp_ip;
400 s1->default_ttl = ttl;
401 } else {
402 st = s->streams[s->nb_streams - 1];
403 rtsp_st = st->priv_data;
404 rtsp_st->sdp_ip = sdp_ip;
405 rtsp_st->sdp_ttl = ttl;
406 }
407 break;
1617ad97 408 case 's':
75e61b0e 409 av_strlcpy(s->title, p, sizeof(s->title));
1617ad97
FB
410 break;
411 case 'i':
412 if (s->nb_streams == 0) {
75e61b0e 413 av_strlcpy(s->comment, p, sizeof(s->comment));
1617ad97
FB
414 break;
415 }
416 break;
417 case 'm':
418 /* new stream */
419 get_word(st_type, sizeof(st_type), &p);
420 if (!strcmp(st_type, "audio")) {
421 codec_type = CODEC_TYPE_AUDIO;
422 } else if (!strcmp(st_type, "video")) {
423 codec_type = CODEC_TYPE_VIDEO;
424 } else {
425 return;
426 }
1617ad97
FB
427 rtsp_st = av_mallocz(sizeof(RTSPStream));
428 if (!rtsp_st)
429 return;
8b1ab7bf
FB
430 rtsp_st->stream_index = -1;
431 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
432
433 rtsp_st->sdp_ip = s1->default_ip;
434 rtsp_st->sdp_ttl = s1->default_ttl;
435
93ced3e8
FB
436 get_word(buf1, sizeof(buf1), &p); /* port */
437 rtsp_st->sdp_port = atoi(buf1);
438
439 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 440
93ced3e8
FB
441 /* XXX: handle list of formats */
442 get_word(buf1, sizeof(buf1), &p); /* format list */
443 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 444
7ed19d7f 445 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
446 /* no corresponding stream */
447 } else {
448 st = av_new_stream(s, 0);
449 if (!st)
450 return;
451 st->priv_data = rtsp_st;
452 rtsp_st->stream_index = st->index;
01f4895c 453 st->codec->codec_type = codec_type;
d1ccf0e0 454 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 455 /* if standard payload type, we can find the codec right now */
01f4895c 456 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
457 }
458 }
1617ad97 459 /* put a default control url */
75e61b0e 460 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1617ad97
FB
461 break;
462 case 'a':
f7d78f36 463 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
1617ad97
FB
464 char proto[32];
465 /* get the control url */
466 st = s->streams[s->nb_streams - 1];
467 rtsp_st = st->priv_data;
115329f1 468
1617ad97 469 /* XXX: may need to add full url resolution */
6ba5cbc6 470 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
471 if (proto[0] == '\0') {
472 /* relative control URL */
75e61b0e
MR
473 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
474 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 475 } else {
75e61b0e 476 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 477 }
f7d78f36 478 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 479 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 480 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
481 payload_type = atoi(buf1);
482 for(i = 0; i < s->nb_streams;i++) {
483 st = s->streams[i];
484 rtsp_st = st->priv_data;
485 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 486 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
FB
487 }
488 }
f7d78f36 489 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 490 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 491 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
492 payload_type = atoi(buf1);
493 for(i = 0; i < s->nb_streams;i++) {
494 st = s->streams[i];
495 rtsp_st = st->priv_data;
496 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a
RM
497 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
498 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
499 sdp_parse_fmtp(st, p);
500 }
501 } else {
ed787542 502 sdp_parse_fmtp(st, p);
4934884a 503 }
93ced3e8
FB
504 }
505 }
f7d78f36 506 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
507 // let dynamic protocol handlers have a stab at the line.
508 get_word(buf1, sizeof(buf1), &p);
509 payload_type = atoi(buf1);
510 for(i = 0; i < s->nb_streams;i++) {
511 st = s->streams[i];
512 rtsp_st = st->priv_data;
513 if (rtsp_st->sdp_payload_type == payload_type) {
514 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
515 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
516 }
517 }
518 }
f7d78f36 519 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
520 int64_t start, end;
521
522 // this is so that seeking on a streamed file can work.
523 rtsp_parse_range_npt(p, &start, &end);
524 s->start_time= start;
525 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
1617ad97
FB
526 }
527 break;
528 }
529}
530
5c91a675 531static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
532{
533 const char *p;
534 int letter;
535 char buf[1024], *q;
93ced3e8 536 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 537
93ced3e8 538 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
539 p = content;
540 for(;;) {
541 skip_spaces(&p);
542 letter = *p;
543 if (letter == '\0')
544 break;
545 p++;
546 if (*p != '=')
547 goto next_line;
548 p++;
549 /* get the content */
550 q = buf;
b6892136 551 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
552 if ((q - buf) < sizeof(buf) - 1)
553 *q++ = *p;
554 p++;
555 }
556 *q = '\0';
93ced3e8 557 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
558 next_line:
559 while (*p != '\n' && *p != '\0')
560 p++;
561 if (*p == '\n')
562 p++;
563 }
564 return 0;
565}
566
567static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
568{
569 const char *p;
570 int v;
571
572 p = *pp;
573 skip_spaces(&p);
574 v = strtol(p, (char **)&p, 10);
575 if (*p == '-') {
576 p++;
577 *min_ptr = v;
578 v = strtol(p, (char **)&p, 10);
579 *max_ptr = v;
580 } else {
581 *min_ptr = v;
582 *max_ptr = v;
583 }
584 *pp = p;
585}
586
587/* XXX: only one transport specification is parsed */
588static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
589{
590 char transport_protocol[16];
591 char profile[16];
592 char lower_transport[16];
593 char parameter[16];
594 RTSPTransportField *th;
595 char buf[256];
115329f1 596
1617ad97 597 reply->nb_transports = 0;
115329f1 598
1617ad97
FB
599 for(;;) {
600 skip_spaces(&p);
601 if (*p == '\0')
602 break;
603
604 th = &reply->transports[reply->nb_transports];
605
115329f1 606 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
607 "/", &p);
608 if (*p == '/')
609 p++;
e1502118 610 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
611 get_word_sep(profile, sizeof(profile), "/;,", &p);
612 lower_transport[0] = '\0';
613 /* rtp/avp/<protocol> */
614 if (*p == '/') {
615 p++;
616 get_word_sep(lower_transport, sizeof(lower_transport),
617 ";,", &p);
618 }
619 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
620 /* x-pn-tng/<protocol> */
e1502118
LB
621 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
622 profile[0] = '\0';
1617ad97 623 }
b6892136 624 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
625 th->protocol = RTSP_PROTOCOL_RTP_TCP;
626 else
627 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 628
1617ad97
FB
629 if (*p == ';')
630 p++;
631 /* get each parameter */
632 while (*p != '\0' && *p != ',') {
633 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
634 if (!strcmp(parameter, "port")) {
635 if (*p == '=') {
636 p++;
637 rtsp_parse_range(&th->port_min, &th->port_max, &p);
638 }
639 } else if (!strcmp(parameter, "client_port")) {
640 if (*p == '=') {
641 p++;
115329f1 642 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
643 &th->client_port_max, &p);
644 }
645 } else if (!strcmp(parameter, "server_port")) {
646 if (*p == '=') {
647 p++;
115329f1 648 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
649 &th->server_port_max, &p);
650 }
651 } else if (!strcmp(parameter, "interleaved")) {
652 if (*p == '=') {
653 p++;
115329f1 654 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
655 &th->interleaved_max, &p);
656 }
657 } else if (!strcmp(parameter, "multicast")) {
658 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
659 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
660 } else if (!strcmp(parameter, "ttl")) {
661 if (*p == '=') {
662 p++;
663 th->ttl = strtol(p, (char **)&p, 10);
664 }
665 } else if (!strcmp(parameter, "destination")) {
666 struct in_addr ipaddr;
667
668 if (*p == '=') {
669 p++;
670 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 671 if (inet_aton(buf, &ipaddr))
1617ad97
FB
672 th->destination = ntohl(ipaddr.s_addr);
673 }
674 }
675 while (*p != ';' && *p != '\0' && *p != ',')
676 p++;
677 if (*p == ';')
678 p++;
679 }
680 if (*p == ',')
681 p++;
682
683 reply->nb_transports++;
684 }
685}
686
687void rtsp_parse_line(RTSPHeader *reply, const char *buf)
688{
689 const char *p;
690
691 /* NOTE: we do case independent match for broken servers */
692 p = buf;
f7d78f36 693 if (av_stristart(p, "Session:", &p)) {
1617ad97 694 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 695 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 696 reply->content_length = strtol(p, NULL, 10);
f7d78f36 697 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 698 rtsp_parse_transport(reply, p);
f7d78f36 699 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 700 reply->seq = strtol(p, NULL, 10);
f7d78f36 701 } else if (av_stristart(p, "Range:", &p)) {
31693e00 702 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1617ad97
FB
703 }
704}
705
2a42b5c3
LS
706static int url_readbuf(URLContext *h, unsigned char *buf, int size)
707{
708 int ret, len;
709
710 len = 0;
711 while (len < size) {
712 ret = url_read(h, buf+len, size-len);
713 if (ret < 1)
714 return ret;
715 len += ret;
716 }
717 return len;
718}
719
b7b8fc34
FB
720/* skip a RTP/TCP interleaved packet */
721static void rtsp_skip_packet(AVFormatContext *s)
722{
723 RTSPState *rt = s->priv_data;
724 int ret, len, len1;
725 uint8_t buf[1024];
726
2a42b5c3 727 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
728 if (ret != 3)
729 return;
80fb8234 730 len = AV_RB16(buf + 1);
b7b8fc34
FB
731#ifdef DEBUG
732 printf("skipping RTP packet len=%d\n", len);
733#endif
734 /* skip payload */
735 while (len > 0) {
736 len1 = len;
737 if (len1 > sizeof(buf))
738 len1 = sizeof(buf);
2a42b5c3 739 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
740 if (ret != len1)
741 return;
742 len -= len1;
743 }
744}
1617ad97 745
115329f1
DB
746static void rtsp_send_cmd(AVFormatContext *s,
747 const char *cmd, RTSPHeader *reply,
1617ad97
FB
748 unsigned char **content_ptr)
749{
750 RTSPState *rt = s->priv_data;
751 char buf[4096], buf1[1024], *q;
752 unsigned char ch;
753 const char *p;
754 int content_length, line_count;
755 unsigned char *content = NULL;
756
757 memset(reply, 0, sizeof(RTSPHeader));
758
759 rt->seq++;
75e61b0e 760 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 761 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 762 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 763 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 764 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 765 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 766 }
75e61b0e 767 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
768#ifdef DEBUG
769 printf("Sending:\n%s--\n", buf);
770#endif
771 url_write(rt->rtsp_hd, buf, strlen(buf));
772
773 /* parse reply (XXX: use buffers) */
774 line_count = 0;
775 rt->last_reply[0] = '\0';
776 for(;;) {
777 q = buf;
778 for(;;) {
2a42b5c3 779 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
780 break;
781 if (ch == '\n')
782 break;
b7b8fc34
FB
783 if (ch == '$') {
784 /* XXX: only parse it if first char on line ? */
785 rtsp_skip_packet(s);
786 } else if (ch != '\r') {
1617ad97
FB
787 if ((q - buf) < sizeof(buf) - 1)
788 *q++ = ch;
789 }
790 }
791 *q = '\0';
792#ifdef DEBUG
793 printf("line='%s'\n", buf);
794#endif
795 /* test if last line */
796 if (buf[0] == '\0')
797 break;
798 p = buf;
799 if (line_count == 0) {
800 /* get reply code */
801 get_word(buf1, sizeof(buf1), &p);
802 get_word(buf1, sizeof(buf1), &p);
803 reply->status_code = atoi(buf1);
804 } else {
805 rtsp_parse_line(reply, p);
75e61b0e
MR
806 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
807 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
808 }
809 line_count++;
810 }
115329f1 811
1617ad97 812 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 813 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 814
1617ad97
FB
815 content_length = reply->content_length;
816 if (content_length > 0) {
817 /* leave some room for a trailing '\0' (useful for simple parsing) */
818 content = av_malloc(content_length + 1);
2a42b5c3 819 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
820 content[content_length] = '\0';
821 }
822 if (content_ptr)
823 *content_ptr = content;
e2e2e7dd
AB
824 else
825 av_free(content);
1617ad97
FB
826}
827
1617ad97 828
8b1ab7bf
FB
829/* close and free RTSP streams */
830static void rtsp_close_streams(RTSPState *rt)
831{
832 int i;
833 RTSPStream *rtsp_st;
834
835 for(i=0;i<rt->nb_rtsp_streams;i++) {
836 rtsp_st = rt->rtsp_streams[i];
837 if (rtsp_st) {
838 if (rtsp_st->rtp_ctx)
839 rtp_parse_close(rtsp_st->rtp_ctx);
840 if (rtsp_st->rtp_handle)
841 url_close(rtsp_st->rtp_handle);
4934884a
RM
842 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
843 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf
FB
844 }
845 av_free(rtsp_st);
846 }
847 av_free(rt->rtsp_streams);
848}
849
53620bba
RB
850/**
851 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
852 */
853static int
8792f52a 854make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
1617ad97
FB
855{
856 RTSPState *rt = s->priv_data;
53620bba 857 int j, i, err;
1617ad97 858 RTSPStream *rtsp_st;
8b1ab7bf 859 AVStream *st;
53620bba
RB
860 RTSPHeader reply1, *reply = &reply1;
861 char cmd[2048];
115329f1 862
1617ad97
FB
863 /* for each stream, make the setup request */
864 /* XXX: we assume the same server is used for the control of each
865 RTSP stream */
d1ccf0e0
RD
866
867 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
868 char transport[2048];
869
8b1ab7bf 870 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
871
872 /* compute available transports */
873 transport[0] = '\0';
874
875 /* RTP/UDP */
8792f52a 876 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
85fb7b34 877 char buf[256];
85fb7b34
FB
878
879 /* first try in specified port range */
d1ccf0e0
RD
880 if (RTSP_RTP_PORT_MIN != 0) {
881 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 882 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 883 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 884 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 885 goto rtp_opened;
d1ccf0e0 886 }
85fb7b34 887 }
1617ad97 888 }
85fb7b34 889
d1ccf0e0
RD
890/* then try on any port
891** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
892** err = AVERROR_INVALIDDATA;
893** goto fail;
894** }
895*/
85fb7b34
FB
896
897 rtp_opened:
8b1ab7bf 898 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97 899 if (transport[0] != '\0')
75e61b0e 900 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
901 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
902 "RTP/AVP/UDP;unicast;client_port=%d-%d",
903 port, port + 1);
904 }
905
906 /* RTP/TCP */
8792f52a 907 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
1617ad97 908 if (transport[0] != '\0')
75e61b0e 909 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
910 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
911 "RTP/AVP/TCP");
912 }
913
8792f52a 914 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
1617ad97 915 if (transport[0] != '\0')
75e61b0e 916 av_strlcat(transport, ",", sizeof(transport));
115329f1 917 snprintf(transport + strlen(transport),
1617ad97
FB
918 sizeof(transport) - strlen(transport) - 1,
919 "RTP/AVP/UDP;multicast");
920 }
115329f1 921 snprintf(cmd, sizeof(cmd),
b6892136
FB
922 "SETUP %s RTSP/1.0\r\n"
923 "Transport: %s\r\n",
1617ad97
FB
924 rtsp_st->control_url, transport);
925 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
926 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
927 err = 1;
928 goto fail;
7e6ca34f
RB
929 } else if (reply->status_code != RTSP_STATUS_OK ||
930 reply->nb_transports != 1) {
1617ad97
FB
931 err = AVERROR_INVALIDDATA;
932 goto fail;
933 }
934
935 /* XXX: same protocol for all streams is required */
936 if (i > 0) {
937 if (reply->transports[0].protocol != rt->protocol) {
938 err = AVERROR_INVALIDDATA;
939 goto fail;
940 }
941 } else {
942 rt->protocol = reply->transports[0].protocol;
943 }
944
945 /* close RTP connection if not choosen */
946 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
8792f52a 947 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
8b1ab7bf
FB
948 url_close(rtsp_st->rtp_handle);
949 rtsp_st->rtp_handle = NULL;
1617ad97
FB
950 }
951
952 switch(reply->transports[0].protocol) {
953 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
954 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
955 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
956 break;
115329f1 957
1617ad97
FB
958 case RTSP_PROTOCOL_RTP_UDP:
959 {
960 char url[1024];
115329f1 961
1617ad97 962 /* XXX: also use address if specified */
115329f1 963 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 964 host, reply->transports[0].server_port_min);
8b1ab7bf 965 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
966 err = AVERROR_INVALIDDATA;
967 goto fail;
968 }
969 }
970 break;
971 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
972 {
973 char url[1024];
d02678ec 974 struct in_addr in;
1617ad97 975
d02678ec 976 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 977 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
978 inet_ntoa(in),
979 reply->transports[0].port_min,
980 reply->transports[0].ttl);
dbf30963 981 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
982 err = AVERROR_INVALIDDATA;
983 goto fail;
984 }
985 }
986 break;
987 }
8b1ab7bf
FB
988 /* open the RTP context */
989 st = NULL;
990 if (rtsp_st->stream_index >= 0)
991 st = s->streams[rtsp_st->stream_index];
992 if (!st)
993 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 994 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
d1ccf0e0 995
8b1ab7bf 996 if (!rtsp_st->rtp_ctx) {
769e10f0 997 err = AVERROR(ENOMEM);
8b1ab7bf 998 goto fail;
4934884a
RM
999 } else {
1000 if(rtsp_st->dynamic_handler) {
1001 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1002 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1003 }
8b1ab7bf 1004 }
1617ad97
FB
1005 }
1006
53620bba
RB
1007 return 0;
1008
1009fail:
8a8754d8
RB
1010 for (i=0; i<rt->nb_rtsp_streams; i++) {
1011 if (rt->rtsp_streams[i]->rtp_handle) {
1012 url_close(rt->rtsp_streams[i]->rtp_handle);
1013 rt->rtsp_streams[i]->rtp_handle = NULL;
1014 }
1015 }
53620bba
RB
1016 return err;
1017}
1018
1019static int rtsp_read_header(AVFormatContext *s,
1020 AVFormatParameters *ap)
1021{
1022 RTSPState *rt = s->priv_data;
1023 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1024 URLContext *rtsp_hd;
1025 int port, ret, err;
1026 RTSPHeader reply1, *reply = &reply1;
1027 unsigned char *content = NULL;
1028 int protocol_mask = 0;
1029
1030 /* extract hostname and port */
1031 url_split(NULL, 0, NULL, 0,
1032 host, sizeof(host), &port, path, sizeof(path), s->filename);
1033 if (port < 0)
1034 port = RTSP_DEFAULT_PORT;
1035
1036 /* search for options */
1037 option_list = strchr(path, '?');
1038 if (option_list) {
1039 /* remove the options from the path */
1040 *option_list++ = 0;
1041 while(option_list) {
1042 /* move the option pointer */
1043 option = option_list;
1044 option_list = strchr(option_list, '&');
1045 if (option_list)
1046 *(option_list++) = 0;
1047 /* handle the options */
1048 if (strcmp(option, "udp") == 0)
1049 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1050 else if (strcmp(option, "multicast") == 0)
1051 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1052 else if (strcmp(option, "tcp") == 0)
1053 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1054 }
1055 }
1056
1057 if (!protocol_mask)
8a8754d8 1058 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
53620bba
RB
1059
1060 /* open the tcp connexion */
1061 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1062 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1063 return AVERROR(EIO);
1064 rt->rtsp_hd = rtsp_hd;
1065 rt->seq = 0;
1066
1067 /* describe the stream */
1068 snprintf(cmd, sizeof(cmd),
1069 "DESCRIBE %s RTSP/1.0\r\n"
1070 "Accept: application/sdp\r\n",
1071 s->filename);
1072 rtsp_send_cmd(s, cmd, reply, &content);
1073 if (!content) {
1074 err = AVERROR_INVALIDDATA;
1075 goto fail;
1076 }
1077 if (reply->status_code != RTSP_STATUS_OK) {
1078 err = AVERROR_INVALIDDATA;
1079 goto fail;
1080 }
1081
1082 /* now we got the SDP description, we parse it */
1083 ret = sdp_parse(s, (const char *)content);
1084 av_freep(&content);
1085 if (ret < 0) {
1086 err = AVERROR_INVALIDDATA;
1087 goto fail;
1088 }
1089
8a8754d8 1090 do {
8792f52a 1091 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
8a8754d8
RB
1092
1093 err = make_setup_request(s, host, port, protocol);
1094 if (err < 0)
7e6ca34f 1095 goto fail;
8792f52a 1096 protocol_mask &= ~(1 << protocol);
8a8754d8 1097 if (protocol_mask == 0 && err == 1) {
5ee0e139 1098 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1099 goto fail;
1100 }
1101 } while (err);
53620bba 1102
ff762d6e
FB
1103 rt->state = RTSP_STATE_IDLE;
1104 rt->seek_timestamp = 0; /* default is to start stream at position
1105 zero */
c04c3282 1106 if (ap->initial_pause) {
ff762d6e
FB
1107 /* do not start immediately */
1108 } else {
1109 if (rtsp_read_play(s) < 0) {
1110 err = AVERROR_INVALIDDATA;
1617ad97
FB
1111 goto fail;
1112 }
1113 }
1617ad97
FB
1114 return 0;
1115 fail:
8b1ab7bf 1116 rtsp_close_streams(rt);
1617ad97
FB
1117 av_freep(&content);
1118 url_close(rt->rtsp_hd);
1119 return err;
1120}
1121
8b1ab7bf
FB
1122static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1123 uint8_t *buf, int buf_size)
1617ad97
FB
1124{
1125 RTSPState *rt = s->priv_data;
b6892136 1126 int id, len, i, ret;
1617ad97 1127 RTSPStream *rtsp_st;
1617ad97 1128
b6892136
FB
1129#ifdef DEBUG_RTP_TCP
1130 printf("tcp_read_packet:\n");
1131#endif
1617ad97
FB
1132 redo:
1133 for(;;) {
2a42b5c3 1134 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1135#ifdef DEBUG_RTP_TCP
1136 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1137#endif
1138 if (ret != 1)
8b1ab7bf 1139 return -1;
b6892136 1140 if (buf[0] == '$')
1617ad97
FB
1141 break;
1142 }
2a42b5c3 1143 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1144 if (ret != 3)
8b1ab7bf 1145 return -1;
b6892136 1146 id = buf[0];
80fb8234 1147 len = AV_RB16(buf + 1);
b6892136
FB
1148#ifdef DEBUG_RTP_TCP
1149 printf("id=%d len=%d\n", id, len);
1150#endif
8b1ab7bf 1151 if (len > buf_size || len < 12)
1617ad97
FB
1152 goto redo;
1153 /* get the data */
2a42b5c3 1154 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1155 if (ret != len)
8b1ab7bf 1156 return -1;
115329f1 1157
1617ad97 1158 /* find the matching stream */
8b1ab7bf
FB
1159 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1160 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1161 if (id >= rtsp_st->interleaved_min &&
1162 id <= rtsp_st->interleaved_max)
1617ad97
FB
1163 goto found;
1164 }
1165 goto redo;
1166 found:
8b1ab7bf
FB
1167 *prtsp_st = rtsp_st;
1168 return len;
1617ad97
FB
1169}
1170
115329f1 1171static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1172 uint8_t *buf, int buf_size)
1617ad97 1173{
8b1ab7bf 1174 RTSPState *rt = s->priv_data;
1617ad97
FB
1175 RTSPStream *rtsp_st;
1176 fd_set rfds;
1177 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1178 struct timeval tv;
1179
1180 for(;;) {
b7b8fc34 1181 if (url_interrupt_cb())
a960a1e0 1182 return AVERROR(EINTR);
1617ad97
FB
1183 FD_ZERO(&rfds);
1184 fd_max = -1;
8b1ab7bf
FB
1185 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1186 rtsp_st = rt->rtsp_streams[i];
1617ad97 1187 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1188 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1189 if (fd1 > fd_max)
1190 fd_max = fd1;
1191 FD_SET(fd1, &rfds);
1192 }
1617ad97 1193 tv.tv_sec = 0;
b7b8fc34 1194 tv.tv_usec = 100 * 1000;
1617ad97
FB
1195 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1196 if (n > 0) {
8b1ab7bf
FB
1197 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1198 rtsp_st = rt->rtsp_streams[i];
1199 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1200 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1201 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1202 if (ret > 0) {
1203 *prtsp_st = rtsp_st;
1617ad97
FB
1204 return ret;
1205 }
1206 }
1207 }
1208 }
1209 }
1210}
1211
1212static int rtsp_read_packet(AVFormatContext *s,
1213 AVPacket *pkt)
1214{
1215 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1216 RTSPStream *rtsp_st;
1217 int ret, len;
1218 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1219
1220 /* get next frames from the same RTP packet */
1221 if (rt->cur_rtp) {
1222 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1223 if (ret == 0) {
1224 rt->cur_rtp = NULL;
1225 return 0;
1226 } else if (ret == 1) {
1227 return 0;
1228 } else {
1229 rt->cur_rtp = NULL;
1230 }
1231 }
1617ad97 1232
8b1ab7bf
FB
1233 /* read next RTP packet */
1234 redo:
1617ad97
FB
1235 switch(rt->protocol) {
1236 default:
1237 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1238 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1239 break;
1240 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1241 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1242 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
74ef8b43 1243 if (len >=0 && rtsp_st->rtp_ctx)
dbf30963 1244 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1245 break;
1246 }
8b1ab7bf 1247 if (len < 0)
489b0d4d 1248 return len;
8b1ab7bf
FB
1249 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1250 if (ret < 0)
1251 goto redo;
1252 if (ret == 1) {
1253 /* more packets may follow, so we save the RTP context */
1254 rt->cur_rtp = rtsp_st->rtp_ctx;
1255 }
1256 return 0;
1617ad97
FB
1257}
1258
ff762d6e 1259static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1260{
ff762d6e 1261 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1262 RTSPHeader reply1, *reply = &reply1;
1263 char cmd[1024];
1264
bc874dae 1265 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1266
1267 if (rt->state == RTSP_STATE_PAUSED) {
115329f1 1268 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1269 "PLAY %s RTSP/1.0\r\n",
1270 s->filename);
1271 } else {
115329f1 1272 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1273 "PLAY %s RTSP/1.0\r\n"
1274 "Range: npt=%0.3f-\r\n",
1275 s->filename,
1276 (double)rt->seek_timestamp / AV_TIME_BASE);
1277 }
b7b8fc34
FB
1278 rtsp_send_cmd(s, cmd, reply, NULL);
1279 if (reply->status_code != RTSP_STATUS_OK) {
1280 return -1;
1281 } else {
ff762d6e 1282 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1283 return 0;
1284 }
1285}
1286
ff762d6e
FB
1287/* pause the stream */
1288static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1289{
ff762d6e 1290 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1291 RTSPHeader reply1, *reply = &reply1;
1292 char cmd[1024];
1293
b7b8fc34 1294 rt = s->priv_data;
115329f1 1295
ff762d6e
FB
1296 if (rt->state != RTSP_STATE_PLAYING)
1297 return 0;
1298
115329f1 1299 snprintf(cmd, sizeof(cmd),
ff762d6e 1300 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1301 s->filename);
1302 rtsp_send_cmd(s, cmd, reply, NULL);
1303 if (reply->status_code != RTSP_STATUS_OK) {
1304 return -1;
1305 } else {
ff762d6e 1306 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1307 return 0;
1308 }
1309}
1310
115329f1 1311static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1312 int64_t timestamp, int flags)
ff762d6e
FB
1313{
1314 RTSPState *rt = s->priv_data;
115329f1 1315
50755217 1316 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1317 switch(rt->state) {
1318 default:
1319 case RTSP_STATE_IDLE:
1320 break;
1321 case RTSP_STATE_PLAYING:
1322 if (rtsp_read_play(s) != 0)
1323 return -1;
1324 break;
1325 case RTSP_STATE_PAUSED:
1326 rt->state = RTSP_STATE_IDLE;
1327 break;
1328 }
1329 return 0;
1330}
1331
1617ad97
FB
1332static int rtsp_read_close(AVFormatContext *s)
1333{
1334 RTSPState *rt = s->priv_data;
1617ad97 1335 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1336 char cmd[1024];
1337
b6892136 1338#if 0
1617ad97
FB
1339 /* NOTE: it is valid to flush the buffer here */
1340 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1341 url_fclose(&rt->rtsp_gb);
1342 }
b6892136 1343#endif
115329f1 1344 snprintf(cmd, sizeof(cmd),
b6892136 1345 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1346 s->filename);
1347 rtsp_send_cmd(s, cmd, reply, NULL);
1348
8b1ab7bf 1349 rtsp_close_streams(rt);
1617ad97
FB
1350 url_close(rt->rtsp_hd);
1351 return 0;
1352}
1353
96862926 1354#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1355AVInputFormat rtsp_demuxer = {
1617ad97
FB
1356 "rtsp",
1357 "RTSP input format",
1358 sizeof(RTSPState),
1359 rtsp_probe,
1360 rtsp_read_header,
1361 rtsp_read_packet,
1362 rtsp_read_close,
ff762d6e 1363 rtsp_read_seek,
bb76a117 1364 .flags = AVFMT_NOFILE,
ff762d6e
FB
1365 .read_play = rtsp_read_play,
1366 .read_pause = rtsp_read_pause,
1617ad97 1367};
96862926 1368#endif
1617ad97 1369
cb1fdc61 1370static int sdp_probe(AVProbeData *p1)
93ced3e8 1371{
0e1ceacd 1372 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1373
1374 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1375 while (p < p_end && *p != '\0') {
f7d78f36 1376 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1377 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1378
1379 while(p < p_end - 1 && *p != '\n') p++;
1380 if (++p >= p_end)
cb1fdc61 1381 break;
cb1fdc61
FB
1382 if (*p == '\r')
1383 p++;
1384 }
93ced3e8
FB
1385 return 0;
1386}
1387
1388#define SDP_MAX_SIZE 8192
1389
1390static int sdp_read_header(AVFormatContext *s,
1391 AVFormatParameters *ap)
1392{
8b1ab7bf 1393 RTSPState *rt = s->priv_data;
93ced3e8
FB
1394 RTSPStream *rtsp_st;
1395 int size, i, err;
1396 char *content;
1397 char url[1024];
8b1ab7bf 1398 AVStream *st;
93ced3e8
FB
1399
1400 /* read the whole sdp file */
1401 /* XXX: better loading */
1402 content = av_malloc(SDP_MAX_SIZE);
899681cd 1403 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1404 if (size <= 0) {
1405 av_free(content);
1406 return AVERROR_INVALIDDATA;
1407 }
1408 content[size] ='\0';
1409
1410 sdp_parse(s, content);
1411 av_free(content);
1412
1413 /* open each RTP stream */
8b1ab7bf
FB
1414 for(i=0;i<rt->nb_rtsp_streams;i++) {
1415 rtsp_st = rt->rtsp_streams[i];
115329f1 1416
d2bf42be 1417 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1418 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1419 rtsp_st->sdp_port,
d2bf42be 1420 rtsp_st->sdp_port,
93ced3e8 1421 rtsp_st->sdp_ttl);
dbf30963 1422 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1423 err = AVERROR_INVALIDDATA;
1424 goto fail;
1425 }
8b1ab7bf
FB
1426 /* open the RTP context */
1427 st = NULL;
1428 if (rtsp_st->stream_index >= 0)
1429 st = s->streams[rtsp_st->stream_index];
1430 if (!st)
1431 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1432 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
8b1ab7bf 1433 if (!rtsp_st->rtp_ctx) {
769e10f0 1434 err = AVERROR(ENOMEM);
8b1ab7bf 1435 goto fail;
4934884a
RM
1436 } else {
1437 if(rtsp_st->dynamic_handler) {
1438 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1439 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1440 }
8b1ab7bf 1441 }
93ced3e8
FB
1442 }
1443 return 0;
1444 fail:
8b1ab7bf 1445 rtsp_close_streams(rt);
93ced3e8
FB
1446 return err;
1447}
1448
1449static int sdp_read_packet(AVFormatContext *s,
1450 AVPacket *pkt)
1451{
8b1ab7bf 1452 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1453}
1454
1455static int sdp_read_close(AVFormatContext *s)
1456{
8b1ab7bf
FB
1457 RTSPState *rt = s->priv_data;
1458 rtsp_close_streams(rt);
93ced3e8
FB
1459 return 0;
1460}
1461
ff70e601
MR
1462#ifdef CONFIG_SDP_DEMUXER
1463AVInputFormat sdp_demuxer = {
93ced3e8
FB
1464 "sdp",
1465 "SDP",
1466 sizeof(RTSPState),
1467 sdp_probe,
1468 sdp_read_header,
1469 sdp_read_packet,
1470 sdp_read_close,
1471};
ff70e601 1472#endif
93ced3e8 1473
e7047005 1474#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1475/* dummy redirector format (used directly in av_open_input_file now) */
1476static int redir_probe(AVProbeData *pd)
1477{
1478 const char *p;
1479 p = pd->buf;
1480 while (redir_isspace(*p))
1481 p++;
f7d78f36
MR
1482 if (av_strstart(p, "http://", NULL) ||
1483 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1484 return AVPROBE_SCORE_MAX;
1485 return 0;
1486}
1487
e8acf0ed 1488static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1489{
1490 char buf[4096], *q;
1491 int c;
1492 AVFormatContext *ic = NULL;
e8acf0ed 1493 ByteIOContext *f = s->pb;
1617ad97
FB
1494
1495 /* parse each URL and try to open it */
1496 c = url_fgetc(f);
1497 while (c != URL_EOF) {
1498 /* skip spaces */
1499 for(;;) {
1500 if (!redir_isspace(c))
1501 break;
1502 c = url_fgetc(f);
1503 }
1504 if (c == URL_EOF)
1505 break;
1506 /* record url */
1507 q = buf;
1508 for(;;) {
1509 if (c == URL_EOF || redir_isspace(c))
1510 break;
1511 if ((q - buf) < sizeof(buf) - 1)
1512 *q++ = c;
1513 c = url_fgetc(f);
1514 }
1515 *q = '\0';
1516 //printf("URL='%s'\n", buf);
1517 /* try to open the media file */
1518 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1519 break;
1520 }
1617ad97 1521 if (!ic)
6f3e0b21 1522 return AVERROR(EIO);
e8acf0ed
LA
1523
1524 *s = *ic;
1525 url_fclose(f);
1526
1527 return 0;
1617ad97
FB
1528}
1529
d2a067d1 1530AVInputFormat redir_demuxer = {
1617ad97
FB
1531 "redir",
1532 "Redirector format",
1533 0,
1534 redir_probe,
e8acf0ed 1535 redir_read_header,
1617ad97
FB
1536 NULL,
1537 NULL,
1538};
e7047005 1539#endif