simplify mpeg12 avctx->pix_fmt set
[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 21
7246177d
AJ
22/* needed by inet_aton() */
23#define _SVID_SOURCE
24
245976da 25#include "libavutil/avstring.h"
1617ad97
FB
26#include "avformat.h"
27
db0ed93e 28#include <sys/time.h>
438fcb75 29#include <unistd.h> /* for select() prototype */
ea452b54 30#include <strings.h>
42572ef5 31#include "network.h"
c971ff19 32#include "rtsp.h"
1617ad97 33
4934884a
RM
34#include "rtp_internal.h"
35
1617ad97 36//#define DEBUG
b6892136 37//#define DEBUG_RTP_TCP
1617ad97 38
ff762d6e
FB
39enum RTSPClientState {
40 RTSP_STATE_IDLE,
41 RTSP_STATE_PLAYING,
42 RTSP_STATE_PAUSED,
43};
44
1617ad97
FB
45typedef struct RTSPState {
46 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
8b1ab7bf
FB
47 int nb_rtsp_streams;
48 struct RTSPStream **rtsp_streams;
115329f1 49
ff762d6e
FB
50 enum RTSPClientState state;
51 int64_t seek_timestamp;
115329f1 52
b6892136
FB
53 /* XXX: currently we use unbuffered input */
54 // ByteIOContext rtsp_gb;
1617ad97
FB
55 int seq; /* RTSP command sequence number */
56 char session_id[512];
57 enum RTSPProtocol protocol;
58 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 59 RTPDemuxContext *cur_rtp;
1617ad97
FB
60} RTSPState;
61
62typedef struct RTSPStream {
8b1ab7bf
FB
63 URLContext *rtp_handle; /* RTP stream handle */
64 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 65
8b1ab7bf 66 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 67 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
93ced3e8
FB
68 char control_url[1024]; /* url for this stream (from SDP) */
69
70 int sdp_port; /* port (from SDP content - not used in RTSP) */
71 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
72 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
73 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 74 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
4934884a
RM
75
76 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
77 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
1617ad97
FB
78} RTSPStream;
79
ff762d6e
FB
80static int rtsp_read_play(AVFormatContext *s);
81
1617ad97
FB
82/* XXX: currently, the only way to change the protocols consists in
83 changing this variable */
1617ad97 84
c482500f 85#if LIBAVFORMAT_VERSION_INT < (53 << 16)
d1ccf0e0 86int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
c482500f 87#endif
85fb7b34 88
1617ad97
FB
89static int rtsp_probe(AVProbeData *p)
90{
f7d78f36 91 if (av_strstart(p->filename, "rtsp:", NULL))
1617ad97
FB
92 return AVPROBE_SCORE_MAX;
93 return 0;
94}
95
96static int redir_isspace(int c)
97{
ccd425e7 98 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
1617ad97
FB
99}
100
101static void skip_spaces(const char **pp)
102{
103 const char *p;
104 p = *pp;
105 while (redir_isspace(*p))
106 p++;
107 *pp = p;
108}
109
115329f1 110static void get_word_sep(char *buf, int buf_size, const char *sep,
1617ad97
FB
111 const char **pp)
112{
113 const char *p;
114 char *q;
115
116 p = *pp;
d1ccf0e0
RD
117 if (*p == '/')
118 p++;
1617ad97
FB
119 skip_spaces(&p);
120 q = buf;
121 while (!strchr(sep, *p) && *p != '\0') {
122 if ((q - buf) < buf_size - 1)
123 *q++ = *p;
124 p++;
125 }
126 if (buf_size > 0)
127 *q = '\0';
128 *pp = p;
129}
130
131static void get_word(char *buf, int buf_size, const char **pp)
132{
133 const char *p;
134 char *q;
135
136 p = *pp;
137 skip_spaces(&p);
138 q = buf;
139 while (!redir_isspace(*p) && *p != '\0') {
140 if ((q - buf) < buf_size - 1)
141 *q++ = *p;
142 p++;
143 }
144 if (buf_size > 0)
145 *q = '\0';
146 *pp = p;
147}
148
93ced3e8
FB
149/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
150 params>] */
4934884a 151static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
93ced3e8
FB
152{
153 char buf[256];
d1ccf0e0
RD
154 int i;
155 AVCodec *c;
7b49ce2e 156 const char *c_name;
93ced3e8 157
d1ccf0e0
RD
158 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
159 see if we can handle this kind of payload */
93ced3e8 160 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 161 if (payload_type >= RTP_PT_PRIVATE) {
4934884a
RM
162 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
163 while(handler) {
164 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
165 codec->codec_id = handler->codec_id;
166 rtsp_st->dynamic_handler= handler;
167 if(handler->open) {
168 rtsp_st->dynamic_protocol_context= handler->open();
169 }
d1ccf0e0
RD
170 break;
171 }
4934884a
RM
172 handler= handler->next;
173 }
93ced3e8 174 } else {
d1ccf0e0
RD
175 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
176 /* search into AVRtpPayloadTypes[] */
7ed19d7f 177 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
d1ccf0e0
RD
178 }
179
180 c = avcodec_find_decoder(codec->codec_id);
181 if (c && c->name)
7b49ce2e 182 c_name = c->name;
d1ccf0e0
RD
183 else
184 c_name = (char *)NULL;
185
186 if (c_name) {
187 get_word_sep(buf, sizeof(buf), "/", &p);
188 i = atoi(buf);
189 switch (codec->codec_type) {
190 case CODEC_TYPE_AUDIO:
191 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
192 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
193 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
194 if (i > 0) {
195 codec->sample_rate = i;
196 get_word_sep(buf, sizeof(buf), "/", &p);
197 i = atoi(buf);
198 if (i > 0)
199 codec->channels = i;
d0deedcb
RM
200 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
201 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
d1ccf0e0
RD
202 }
203 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
204 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
205 break;
206 case CODEC_TYPE_VIDEO:
207 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
208 break;
209 default:
210 break;
211 }
212 return 0;
93ced3e8 213 }
d1ccf0e0
RD
214
215 return -1;
93ced3e8
FB
216}
217
218/* return the length and optionnaly the data */
219static int hex_to_data(uint8_t *data, const char *p)
220{
221 int c, len, v;
222
223 len = 0;
224 v = 1;
225 for(;;) {
226 skip_spaces(&p);
227 if (p == '\0')
228 break;
229 c = toupper((unsigned char)*p++);
230 if (c >= '0' && c <= '9')
231 c = c - '0';
232 else if (c >= 'A' && c <= 'F')
233 c = c - 'A' + 10;
234 else
235 break;
236 v = (v << 4) | c;
237 if (v & 0x100) {
238 if (data)
239 data[len] = v;
240 len++;
241 v = 1;
242 }
243 }
244 return len;
245}
246
d1ccf0e0
RD
247static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
248{
249 switch (codec->codec_id) {
250 case CODEC_ID_MPEG4:
cbee7a69 251 case CODEC_ID_AAC:
d1ccf0e0
RD
252 if (!strcmp(attr, "config")) {
253 /* decode the hexa encoded parameter */
254 int len = hex_to_data(NULL, value);
255 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
256 if (!codec->extradata)
257 return;
258 codec->extradata_size = len;
259 hex_to_data(codec->extradata, value);
260 }
261 break;
262 default:
263 break;
264 }
265 return;
266}
267
268typedef struct attrname_map
269{
7b49ce2e 270 const char *str;
d1ccf0e0
RD
271 uint16_t type;
272 uint32_t offset;
273} attrname_map_t;
274
275/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
276#define ATTR_NAME_TYPE_INT 0
277#define ATTR_NAME_TYPE_STR 1
278static attrname_map_t attr_names[]=
279{
280 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
281 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
282 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
283 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
284 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
285 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
286 {NULL, -1, -1},
287};
288
d0deedcb
RM
289/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
290* because it is used in rtp_h264.c, which is forthcoming.
291*/
292int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
293{
294 skip_spaces(p);
295 if(**p)
296 {
297 get_word_sep(attr, attr_size, "=", p);
298 if (**p == '=')
299 (*p)++;
300 get_word_sep(value, value_size, ";", p);
301 if (**p == ';')
302 (*p)++;
303 return 1;
304 }
305 return 0;
306}
307
d1ccf0e0
RD
308/* parse a SDP line and save stream attributes */
309static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
FB
310{
311 char attr[256];
312 char value[4096];
d1ccf0e0
RD
313 int i;
314
315 RTSPStream *rtsp_st = st->priv_data;
01f4895c 316 AVCodecContext *codec = st->codec;
d1ccf0e0 317 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
93ced3e8
FB
318
319 /* loop on each attribute */
1ad20f96
RM
320 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
321 {
bb270c08 322 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
323 sdp_parse_fmtp_config(codec, attr, value);
324 /* Looking for a known attribute */
325 for (i = 0; attr_names[i].str; ++i) {
326 if (!strcasecmp(attr, attr_names[i].str)) {
327 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
328 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
329 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
330 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 331 }
93ced3e8 332 }
93ced3e8
FB
333 }
334}
335
31693e00
RM
336/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
337 * and end time.
338 * Used for seeking in the rtp stream.
339 */
340static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
341{
342 char buf[256];
343
344 skip_spaces(&p);
f7d78f36 345 if (!av_stristart(p, "npt=", &p))
31693e00
RM
346 return;
347
348 *start = AV_NOPTS_VALUE;
349 *end = AV_NOPTS_VALUE;
350
351 get_word_sep(buf, sizeof(buf), "-", &p);
352 *start = parse_date(buf, 1);
353 if (*p == '-') {
354 p++;
355 get_word_sep(buf, sizeof(buf), "-", &p);
356 *end = parse_date(buf, 1);
357 }
358// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
359// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
360}
361
93ced3e8
FB
362typedef struct SDPParseState {
363 /* SDP only */
364 struct in_addr default_ip;
365 int default_ttl;
366} SDPParseState;
367
368static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
FB
369 int letter, const char *buf)
370{
8b1ab7bf 371 RTSPState *rt = s->priv_data;
1617ad97
FB
372 char buf1[64], st_type[64];
373 const char *p;
93ced3e8 374 int codec_type, payload_type, i;
1617ad97
FB
375 AVStream *st;
376 RTSPStream *rtsp_st;
93ced3e8
FB
377 struct in_addr sdp_ip;
378 int ttl;
379
1617ad97
FB
380#ifdef DEBUG
381 printf("sdp: %c='%s'\n", letter, buf);
382#endif
383
384 p = buf;
385 switch(letter) {
93ced3e8
FB
386 case 'c':
387 get_word(buf1, sizeof(buf1), &p);
388 if (strcmp(buf1, "IN") != 0)
389 return;
390 get_word(buf1, sizeof(buf1), &p);
391 if (strcmp(buf1, "IP4") != 0)
392 return;
393 get_word_sep(buf1, sizeof(buf1), "/", &p);
394 if (inet_aton(buf1, &sdp_ip) == 0)
395 return;
396 ttl = 16;
397 if (*p == '/') {
398 p++;
399 get_word_sep(buf1, sizeof(buf1), "/", &p);
400 ttl = atoi(buf1);
401 }
402 if (s->nb_streams == 0) {
403 s1->default_ip = sdp_ip;
404 s1->default_ttl = ttl;
405 } else {
406 st = s->streams[s->nb_streams - 1];
407 rtsp_st = st->priv_data;
408 rtsp_st->sdp_ip = sdp_ip;
409 rtsp_st->sdp_ttl = ttl;
410 }
411 break;
1617ad97 412 case 's':
75e61b0e 413 av_strlcpy(s->title, p, sizeof(s->title));
1617ad97
FB
414 break;
415 case 'i':
416 if (s->nb_streams == 0) {
75e61b0e 417 av_strlcpy(s->comment, p, sizeof(s->comment));
1617ad97
FB
418 break;
419 }
420 break;
421 case 'm':
422 /* new stream */
423 get_word(st_type, sizeof(st_type), &p);
424 if (!strcmp(st_type, "audio")) {
425 codec_type = CODEC_TYPE_AUDIO;
426 } else if (!strcmp(st_type, "video")) {
427 codec_type = CODEC_TYPE_VIDEO;
428 } else {
429 return;
430 }
1617ad97
FB
431 rtsp_st = av_mallocz(sizeof(RTSPStream));
432 if (!rtsp_st)
433 return;
8b1ab7bf
FB
434 rtsp_st->stream_index = -1;
435 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
436
437 rtsp_st->sdp_ip = s1->default_ip;
438 rtsp_st->sdp_ttl = s1->default_ttl;
439
93ced3e8
FB
440 get_word(buf1, sizeof(buf1), &p); /* port */
441 rtsp_st->sdp_port = atoi(buf1);
442
443 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 444
93ced3e8
FB
445 /* XXX: handle list of formats */
446 get_word(buf1, sizeof(buf1), &p); /* format list */
447 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 448
7ed19d7f 449 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
450 /* no corresponding stream */
451 } else {
452 st = av_new_stream(s, 0);
453 if (!st)
454 return;
455 st->priv_data = rtsp_st;
456 rtsp_st->stream_index = st->index;
01f4895c 457 st->codec->codec_type = codec_type;
d1ccf0e0 458 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 459 /* if standard payload type, we can find the codec right now */
01f4895c 460 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
461 }
462 }
1617ad97 463 /* put a default control url */
75e61b0e 464 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
1617ad97
FB
465 break;
466 case 'a':
f7d78f36 467 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
1617ad97
FB
468 char proto[32];
469 /* get the control url */
470 st = s->streams[s->nb_streams - 1];
471 rtsp_st = st->priv_data;
115329f1 472
1617ad97 473 /* XXX: may need to add full url resolution */
6ba5cbc6 474 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
475 if (proto[0] == '\0') {
476 /* relative control URL */
75e61b0e
MR
477 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
478 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 479 } else {
75e61b0e 480 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 481 }
f7d78f36 482 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 483 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 484 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
485 payload_type = atoi(buf1);
486 for(i = 0; i < s->nb_streams;i++) {
487 st = s->streams[i];
488 rtsp_st = st->priv_data;
489 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 490 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
FB
491 }
492 }
f7d78f36 493 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 494 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 495 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
496 payload_type = atoi(buf1);
497 for(i = 0; i < s->nb_streams;i++) {
498 st = s->streams[i];
499 rtsp_st = st->priv_data;
500 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a
RM
501 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
502 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
503 sdp_parse_fmtp(st, p);
504 }
505 } else {
ed787542 506 sdp_parse_fmtp(st, p);
4934884a 507 }
93ced3e8
FB
508 }
509 }
f7d78f36 510 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
511 // let dynamic protocol handlers have a stab at the line.
512 get_word(buf1, sizeof(buf1), &p);
513 payload_type = atoi(buf1);
514 for(i = 0; i < s->nb_streams;i++) {
515 st = s->streams[i];
516 rtsp_st = st->priv_data;
517 if (rtsp_st->sdp_payload_type == payload_type) {
518 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
519 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
520 }
521 }
522 }
f7d78f36 523 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
524 int64_t start, end;
525
526 // this is so that seeking on a streamed file can work.
527 rtsp_parse_range_npt(p, &start, &end);
528 s->start_time= start;
529 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
1617ad97
FB
530 }
531 break;
532 }
533}
534
5c91a675 535static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
536{
537 const char *p;
538 int letter;
539 char buf[1024], *q;
93ced3e8 540 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 541
93ced3e8 542 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
543 p = content;
544 for(;;) {
545 skip_spaces(&p);
546 letter = *p;
547 if (letter == '\0')
548 break;
549 p++;
550 if (*p != '=')
551 goto next_line;
552 p++;
553 /* get the content */
554 q = buf;
b6892136 555 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
556 if ((q - buf) < sizeof(buf) - 1)
557 *q++ = *p;
558 p++;
559 }
560 *q = '\0';
93ced3e8 561 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
562 next_line:
563 while (*p != '\n' && *p != '\0')
564 p++;
565 if (*p == '\n')
566 p++;
567 }
568 return 0;
569}
570
571static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
572{
573 const char *p;
574 int v;
575
576 p = *pp;
577 skip_spaces(&p);
578 v = strtol(p, (char **)&p, 10);
579 if (*p == '-') {
580 p++;
581 *min_ptr = v;
582 v = strtol(p, (char **)&p, 10);
583 *max_ptr = v;
584 } else {
585 *min_ptr = v;
586 *max_ptr = v;
587 }
588 *pp = p;
589}
590
591/* XXX: only one transport specification is parsed */
592static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
593{
594 char transport_protocol[16];
595 char profile[16];
596 char lower_transport[16];
597 char parameter[16];
598 RTSPTransportField *th;
599 char buf[256];
115329f1 600
1617ad97 601 reply->nb_transports = 0;
115329f1 602
1617ad97
FB
603 for(;;) {
604 skip_spaces(&p);
605 if (*p == '\0')
606 break;
607
608 th = &reply->transports[reply->nb_transports];
609
115329f1 610 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
611 "/", &p);
612 if (*p == '/')
613 p++;
e1502118 614 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
615 get_word_sep(profile, sizeof(profile), "/;,", &p);
616 lower_transport[0] = '\0';
617 /* rtp/avp/<protocol> */
618 if (*p == '/') {
619 p++;
620 get_word_sep(lower_transport, sizeof(lower_transport),
621 ";,", &p);
622 }
623 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
624 /* x-pn-tng/<protocol> */
e1502118
LB
625 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
626 profile[0] = '\0';
1617ad97 627 }
b6892136 628 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
629 th->protocol = RTSP_PROTOCOL_RTP_TCP;
630 else
631 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 632
1617ad97
FB
633 if (*p == ';')
634 p++;
635 /* get each parameter */
636 while (*p != '\0' && *p != ',') {
637 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
638 if (!strcmp(parameter, "port")) {
639 if (*p == '=') {
640 p++;
641 rtsp_parse_range(&th->port_min, &th->port_max, &p);
642 }
643 } else if (!strcmp(parameter, "client_port")) {
644 if (*p == '=') {
645 p++;
115329f1 646 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
647 &th->client_port_max, &p);
648 }
649 } else if (!strcmp(parameter, "server_port")) {
650 if (*p == '=') {
651 p++;
115329f1 652 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
653 &th->server_port_max, &p);
654 }
655 } else if (!strcmp(parameter, "interleaved")) {
656 if (*p == '=') {
657 p++;
115329f1 658 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
659 &th->interleaved_max, &p);
660 }
661 } else if (!strcmp(parameter, "multicast")) {
662 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
663 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
664 } else if (!strcmp(parameter, "ttl")) {
665 if (*p == '=') {
666 p++;
667 th->ttl = strtol(p, (char **)&p, 10);
668 }
669 } else if (!strcmp(parameter, "destination")) {
670 struct in_addr ipaddr;
671
672 if (*p == '=') {
673 p++;
674 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 675 if (inet_aton(buf, &ipaddr))
1617ad97
FB
676 th->destination = ntohl(ipaddr.s_addr);
677 }
678 }
679 while (*p != ';' && *p != '\0' && *p != ',')
680 p++;
681 if (*p == ';')
682 p++;
683 }
684 if (*p == ',')
685 p++;
686
687 reply->nb_transports++;
688 }
689}
690
691void rtsp_parse_line(RTSPHeader *reply, const char *buf)
692{
693 const char *p;
694
695 /* NOTE: we do case independent match for broken servers */
696 p = buf;
f7d78f36 697 if (av_stristart(p, "Session:", &p)) {
1617ad97 698 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 699 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 700 reply->content_length = strtol(p, NULL, 10);
f7d78f36 701 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 702 rtsp_parse_transport(reply, p);
f7d78f36 703 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 704 reply->seq = strtol(p, NULL, 10);
f7d78f36 705 } else if (av_stristart(p, "Range:", &p)) {
31693e00 706 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1617ad97
FB
707 }
708}
709
2a42b5c3
LS
710static int url_readbuf(URLContext *h, unsigned char *buf, int size)
711{
712 int ret, len;
713
714 len = 0;
715 while (len < size) {
716 ret = url_read(h, buf+len, size-len);
717 if (ret < 1)
718 return ret;
719 len += ret;
720 }
721 return len;
722}
723
b7b8fc34
FB
724/* skip a RTP/TCP interleaved packet */
725static void rtsp_skip_packet(AVFormatContext *s)
726{
727 RTSPState *rt = s->priv_data;
728 int ret, len, len1;
729 uint8_t buf[1024];
730
2a42b5c3 731 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
732 if (ret != 3)
733 return;
80fb8234 734 len = AV_RB16(buf + 1);
b7b8fc34
FB
735#ifdef DEBUG
736 printf("skipping RTP packet len=%d\n", len);
737#endif
738 /* skip payload */
739 while (len > 0) {
740 len1 = len;
741 if (len1 > sizeof(buf))
742 len1 = sizeof(buf);
2a42b5c3 743 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
744 if (ret != len1)
745 return;
746 len -= len1;
747 }
748}
1617ad97 749
115329f1
DB
750static void rtsp_send_cmd(AVFormatContext *s,
751 const char *cmd, RTSPHeader *reply,
1617ad97
FB
752 unsigned char **content_ptr)
753{
754 RTSPState *rt = s->priv_data;
755 char buf[4096], buf1[1024], *q;
756 unsigned char ch;
757 const char *p;
758 int content_length, line_count;
759 unsigned char *content = NULL;
760
761 memset(reply, 0, sizeof(RTSPHeader));
762
763 rt->seq++;
75e61b0e 764 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 765 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 766 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 767 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 768 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 769 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 770 }
75e61b0e 771 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
772#ifdef DEBUG
773 printf("Sending:\n%s--\n", buf);
774#endif
775 url_write(rt->rtsp_hd, buf, strlen(buf));
776
777 /* parse reply (XXX: use buffers) */
778 line_count = 0;
779 rt->last_reply[0] = '\0';
780 for(;;) {
781 q = buf;
782 for(;;) {
2a42b5c3 783 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
784 break;
785 if (ch == '\n')
786 break;
b7b8fc34
FB
787 if (ch == '$') {
788 /* XXX: only parse it if first char on line ? */
789 rtsp_skip_packet(s);
790 } else if (ch != '\r') {
1617ad97
FB
791 if ((q - buf) < sizeof(buf) - 1)
792 *q++ = ch;
793 }
794 }
795 *q = '\0';
796#ifdef DEBUG
797 printf("line='%s'\n", buf);
798#endif
799 /* test if last line */
800 if (buf[0] == '\0')
801 break;
802 p = buf;
803 if (line_count == 0) {
804 /* get reply code */
805 get_word(buf1, sizeof(buf1), &p);
806 get_word(buf1, sizeof(buf1), &p);
807 reply->status_code = atoi(buf1);
808 } else {
809 rtsp_parse_line(reply, p);
75e61b0e
MR
810 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
811 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
812 }
813 line_count++;
814 }
115329f1 815
1617ad97 816 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 817 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 818
1617ad97
FB
819 content_length = reply->content_length;
820 if (content_length > 0) {
821 /* leave some room for a trailing '\0' (useful for simple parsing) */
822 content = av_malloc(content_length + 1);
2a42b5c3 823 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
824 content[content_length] = '\0';
825 }
826 if (content_ptr)
827 *content_ptr = content;
e2e2e7dd
AB
828 else
829 av_free(content);
1617ad97
FB
830}
831
1617ad97 832
8b1ab7bf
FB
833/* close and free RTSP streams */
834static void rtsp_close_streams(RTSPState *rt)
835{
836 int i;
837 RTSPStream *rtsp_st;
838
839 for(i=0;i<rt->nb_rtsp_streams;i++) {
840 rtsp_st = rt->rtsp_streams[i];
841 if (rtsp_st) {
842 if (rtsp_st->rtp_ctx)
843 rtp_parse_close(rtsp_st->rtp_ctx);
844 if (rtsp_st->rtp_handle)
845 url_close(rtsp_st->rtp_handle);
4934884a
RM
846 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
847 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 848 }
8b1ab7bf
FB
849 }
850 av_free(rt->rtsp_streams);
851}
852
53620bba
RB
853/**
854 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
855 */
856static int
8792f52a 857make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
1617ad97
FB
858{
859 RTSPState *rt = s->priv_data;
53620bba 860 int j, i, err;
1617ad97 861 RTSPStream *rtsp_st;
8b1ab7bf 862 AVStream *st;
53620bba
RB
863 RTSPHeader reply1, *reply = &reply1;
864 char cmd[2048];
115329f1 865
1617ad97
FB
866 /* for each stream, make the setup request */
867 /* XXX: we assume the same server is used for the control of each
868 RTSP stream */
d1ccf0e0
RD
869
870 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
871 char transport[2048];
872
8b1ab7bf 873 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
874
875 /* compute available transports */
876 transport[0] = '\0';
877
878 /* RTP/UDP */
8792f52a 879 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
85fb7b34 880 char buf[256];
85fb7b34
FB
881
882 /* first try in specified port range */
d1ccf0e0
RD
883 if (RTSP_RTP_PORT_MIN != 0) {
884 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 885 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 886 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 887 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 888 goto rtp_opened;
d1ccf0e0 889 }
85fb7b34 890 }
1617ad97 891 }
85fb7b34 892
d1ccf0e0
RD
893/* then try on any port
894** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
895** err = AVERROR_INVALIDDATA;
896** goto fail;
897** }
898*/
85fb7b34
FB
899
900 rtp_opened:
8b1ab7bf 901 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97 902 if (transport[0] != '\0')
75e61b0e 903 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
904 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
905 "RTP/AVP/UDP;unicast;client_port=%d-%d",
906 port, port + 1);
907 }
908
909 /* RTP/TCP */
8792f52a 910 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
1617ad97 911 if (transport[0] != '\0')
75e61b0e 912 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
913 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
914 "RTP/AVP/TCP");
915 }
916
8792f52a 917 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
1617ad97 918 if (transport[0] != '\0')
75e61b0e 919 av_strlcat(transport, ",", sizeof(transport));
115329f1 920 snprintf(transport + strlen(transport),
1617ad97
FB
921 sizeof(transport) - strlen(transport) - 1,
922 "RTP/AVP/UDP;multicast");
923 }
115329f1 924 snprintf(cmd, sizeof(cmd),
b6892136
FB
925 "SETUP %s RTSP/1.0\r\n"
926 "Transport: %s\r\n",
1617ad97
FB
927 rtsp_st->control_url, transport);
928 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
929 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
930 err = 1;
931 goto fail;
7e6ca34f
RB
932 } else if (reply->status_code != RTSP_STATUS_OK ||
933 reply->nb_transports != 1) {
1617ad97
FB
934 err = AVERROR_INVALIDDATA;
935 goto fail;
936 }
937
938 /* XXX: same protocol for all streams is required */
939 if (i > 0) {
940 if (reply->transports[0].protocol != rt->protocol) {
941 err = AVERROR_INVALIDDATA;
942 goto fail;
943 }
944 } else {
945 rt->protocol = reply->transports[0].protocol;
946 }
947
948 /* close RTP connection if not choosen */
949 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
8792f52a 950 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
8b1ab7bf
FB
951 url_close(rtsp_st->rtp_handle);
952 rtsp_st->rtp_handle = NULL;
1617ad97
FB
953 }
954
955 switch(reply->transports[0].protocol) {
956 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
957 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
958 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
959 break;
115329f1 960
1617ad97
FB
961 case RTSP_PROTOCOL_RTP_UDP:
962 {
963 char url[1024];
115329f1 964
1617ad97 965 /* XXX: also use address if specified */
115329f1 966 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 967 host, reply->transports[0].server_port_min);
8b1ab7bf 968 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
969 err = AVERROR_INVALIDDATA;
970 goto fail;
971 }
972 }
973 break;
974 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
975 {
976 char url[1024];
d02678ec 977 struct in_addr in;
1617ad97 978
d02678ec 979 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 980 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
981 inet_ntoa(in),
982 reply->transports[0].port_min,
983 reply->transports[0].ttl);
dbf30963 984 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
985 err = AVERROR_INVALIDDATA;
986 goto fail;
987 }
988 }
989 break;
990 }
8b1ab7bf
FB
991 /* open the RTP context */
992 st = NULL;
993 if (rtsp_st->stream_index >= 0)
994 st = s->streams[rtsp_st->stream_index];
995 if (!st)
996 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 997 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
d1ccf0e0 998
8b1ab7bf 999 if (!rtsp_st->rtp_ctx) {
769e10f0 1000 err = AVERROR(ENOMEM);
8b1ab7bf 1001 goto fail;
4934884a
RM
1002 } else {
1003 if(rtsp_st->dynamic_handler) {
1004 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1005 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1006 }
8b1ab7bf 1007 }
1617ad97
FB
1008 }
1009
53620bba
RB
1010 return 0;
1011
1012fail:
8a8754d8
RB
1013 for (i=0; i<rt->nb_rtsp_streams; i++) {
1014 if (rt->rtsp_streams[i]->rtp_handle) {
1015 url_close(rt->rtsp_streams[i]->rtp_handle);
1016 rt->rtsp_streams[i]->rtp_handle = NULL;
1017 }
1018 }
53620bba
RB
1019 return err;
1020}
1021
1022static int rtsp_read_header(AVFormatContext *s,
1023 AVFormatParameters *ap)
1024{
1025 RTSPState *rt = s->priv_data;
1026 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1027 URLContext *rtsp_hd;
1028 int port, ret, err;
1029 RTSPHeader reply1, *reply = &reply1;
1030 unsigned char *content = NULL;
1031 int protocol_mask = 0;
1032
1033 /* extract hostname and port */
1034 url_split(NULL, 0, NULL, 0,
1035 host, sizeof(host), &port, path, sizeof(path), s->filename);
1036 if (port < 0)
1037 port = RTSP_DEFAULT_PORT;
1038
1039 /* search for options */
1040 option_list = strchr(path, '?');
1041 if (option_list) {
1042 /* remove the options from the path */
1043 *option_list++ = 0;
1044 while(option_list) {
1045 /* move the option pointer */
1046 option = option_list;
1047 option_list = strchr(option_list, '&');
1048 if (option_list)
1049 *(option_list++) = 0;
1050 /* handle the options */
1051 if (strcmp(option, "udp") == 0)
1052 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1053 else if (strcmp(option, "multicast") == 0)
1054 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1055 else if (strcmp(option, "tcp") == 0)
1056 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1057 }
1058 }
1059
1060 if (!protocol_mask)
8a8754d8 1061 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
53620bba
RB
1062
1063 /* open the tcp connexion */
1064 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1065 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1066 return AVERROR(EIO);
1067 rt->rtsp_hd = rtsp_hd;
1068 rt->seq = 0;
1069
1070 /* describe the stream */
1071 snprintf(cmd, sizeof(cmd),
1072 "DESCRIBE %s RTSP/1.0\r\n"
1073 "Accept: application/sdp\r\n",
1074 s->filename);
1075 rtsp_send_cmd(s, cmd, reply, &content);
1076 if (!content) {
1077 err = AVERROR_INVALIDDATA;
1078 goto fail;
1079 }
1080 if (reply->status_code != RTSP_STATUS_OK) {
1081 err = AVERROR_INVALIDDATA;
1082 goto fail;
1083 }
1084
1085 /* now we got the SDP description, we parse it */
1086 ret = sdp_parse(s, (const char *)content);
1087 av_freep(&content);
1088 if (ret < 0) {
1089 err = AVERROR_INVALIDDATA;
1090 goto fail;
1091 }
1092
8a8754d8 1093 do {
8792f52a 1094 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
8a8754d8
RB
1095
1096 err = make_setup_request(s, host, port, protocol);
1097 if (err < 0)
7e6ca34f 1098 goto fail;
8792f52a 1099 protocol_mask &= ~(1 << protocol);
8a8754d8 1100 if (protocol_mask == 0 && err == 1) {
5ee0e139 1101 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1102 goto fail;
1103 }
1104 } while (err);
53620bba 1105
ff762d6e
FB
1106 rt->state = RTSP_STATE_IDLE;
1107 rt->seek_timestamp = 0; /* default is to start stream at position
1108 zero */
c04c3282 1109 if (ap->initial_pause) {
ff762d6e
FB
1110 /* do not start immediately */
1111 } else {
1112 if (rtsp_read_play(s) < 0) {
1113 err = AVERROR_INVALIDDATA;
1617ad97
FB
1114 goto fail;
1115 }
1116 }
1617ad97
FB
1117 return 0;
1118 fail:
8b1ab7bf 1119 rtsp_close_streams(rt);
1617ad97
FB
1120 av_freep(&content);
1121 url_close(rt->rtsp_hd);
1122 return err;
1123}
1124
8b1ab7bf
FB
1125static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1126 uint8_t *buf, int buf_size)
1617ad97
FB
1127{
1128 RTSPState *rt = s->priv_data;
b6892136 1129 int id, len, i, ret;
1617ad97 1130 RTSPStream *rtsp_st;
1617ad97 1131
b6892136
FB
1132#ifdef DEBUG_RTP_TCP
1133 printf("tcp_read_packet:\n");
1134#endif
1617ad97
FB
1135 redo:
1136 for(;;) {
2a42b5c3 1137 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1138#ifdef DEBUG_RTP_TCP
1139 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1140#endif
1141 if (ret != 1)
8b1ab7bf 1142 return -1;
b6892136 1143 if (buf[0] == '$')
1617ad97
FB
1144 break;
1145 }
2a42b5c3 1146 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1147 if (ret != 3)
8b1ab7bf 1148 return -1;
b6892136 1149 id = buf[0];
80fb8234 1150 len = AV_RB16(buf + 1);
b6892136
FB
1151#ifdef DEBUG_RTP_TCP
1152 printf("id=%d len=%d\n", id, len);
1153#endif
8b1ab7bf 1154 if (len > buf_size || len < 12)
1617ad97
FB
1155 goto redo;
1156 /* get the data */
2a42b5c3 1157 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1158 if (ret != len)
8b1ab7bf 1159 return -1;
115329f1 1160
1617ad97 1161 /* find the matching stream */
8b1ab7bf
FB
1162 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1163 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1164 if (id >= rtsp_st->interleaved_min &&
1165 id <= rtsp_st->interleaved_max)
1617ad97
FB
1166 goto found;
1167 }
1168 goto redo;
1169 found:
8b1ab7bf
FB
1170 *prtsp_st = rtsp_st;
1171 return len;
1617ad97
FB
1172}
1173
115329f1 1174static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1175 uint8_t *buf, int buf_size)
1617ad97 1176{
8b1ab7bf 1177 RTSPState *rt = s->priv_data;
1617ad97
FB
1178 RTSPStream *rtsp_st;
1179 fd_set rfds;
1180 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1181 struct timeval tv;
1182
1183 for(;;) {
b7b8fc34 1184 if (url_interrupt_cb())
a960a1e0 1185 return AVERROR(EINTR);
1617ad97
FB
1186 FD_ZERO(&rfds);
1187 fd_max = -1;
8b1ab7bf
FB
1188 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1189 rtsp_st = rt->rtsp_streams[i];
1617ad97 1190 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1191 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1192 if (fd1 > fd_max)
1193 fd_max = fd1;
1194 FD_SET(fd1, &rfds);
1195 }
1617ad97 1196 tv.tv_sec = 0;
b7b8fc34 1197 tv.tv_usec = 100 * 1000;
1617ad97
FB
1198 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1199 if (n > 0) {
8b1ab7bf
FB
1200 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1201 rtsp_st = rt->rtsp_streams[i];
1202 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1203 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1204 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1205 if (ret > 0) {
1206 *prtsp_st = rtsp_st;
1617ad97
FB
1207 return ret;
1208 }
1209 }
1210 }
1211 }
1212 }
1213}
1214
1215static int rtsp_read_packet(AVFormatContext *s,
1216 AVPacket *pkt)
1217{
1218 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1219 RTSPStream *rtsp_st;
1220 int ret, len;
1221 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1222
1223 /* get next frames from the same RTP packet */
1224 if (rt->cur_rtp) {
1225 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1226 if (ret == 0) {
1227 rt->cur_rtp = NULL;
1228 return 0;
1229 } else if (ret == 1) {
1230 return 0;
1231 } else {
1232 rt->cur_rtp = NULL;
1233 }
1234 }
1617ad97 1235
8b1ab7bf
FB
1236 /* read next RTP packet */
1237 redo:
1617ad97
FB
1238 switch(rt->protocol) {
1239 default:
1240 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1241 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1242 break;
1243 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1244 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1245 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
74ef8b43 1246 if (len >=0 && rtsp_st->rtp_ctx)
dbf30963 1247 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1248 break;
1249 }
8b1ab7bf 1250 if (len < 0)
489b0d4d 1251 return len;
8b1ab7bf
FB
1252 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1253 if (ret < 0)
1254 goto redo;
1255 if (ret == 1) {
1256 /* more packets may follow, so we save the RTP context */
1257 rt->cur_rtp = rtsp_st->rtp_ctx;
1258 }
1259 return 0;
1617ad97
FB
1260}
1261
ff762d6e 1262static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1263{
ff762d6e 1264 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1265 RTSPHeader reply1, *reply = &reply1;
1266 char cmd[1024];
1267
bc874dae 1268 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1269
1270 if (rt->state == RTSP_STATE_PAUSED) {
115329f1 1271 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1272 "PLAY %s RTSP/1.0\r\n",
1273 s->filename);
1274 } else {
115329f1 1275 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1276 "PLAY %s RTSP/1.0\r\n"
1277 "Range: npt=%0.3f-\r\n",
1278 s->filename,
1279 (double)rt->seek_timestamp / AV_TIME_BASE);
1280 }
b7b8fc34
FB
1281 rtsp_send_cmd(s, cmd, reply, NULL);
1282 if (reply->status_code != RTSP_STATUS_OK) {
1283 return -1;
1284 } else {
ff762d6e 1285 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1286 return 0;
1287 }
1288}
1289
ff762d6e
FB
1290/* pause the stream */
1291static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1292{
ff762d6e 1293 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1294 RTSPHeader reply1, *reply = &reply1;
1295 char cmd[1024];
1296
b7b8fc34 1297 rt = s->priv_data;
115329f1 1298
ff762d6e
FB
1299 if (rt->state != RTSP_STATE_PLAYING)
1300 return 0;
1301
115329f1 1302 snprintf(cmd, sizeof(cmd),
ff762d6e 1303 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1304 s->filename);
1305 rtsp_send_cmd(s, cmd, reply, NULL);
1306 if (reply->status_code != RTSP_STATUS_OK) {
1307 return -1;
1308 } else {
ff762d6e 1309 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1310 return 0;
1311 }
1312}
1313
115329f1 1314static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1315 int64_t timestamp, int flags)
ff762d6e
FB
1316{
1317 RTSPState *rt = s->priv_data;
115329f1 1318
50755217 1319 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1320 switch(rt->state) {
1321 default:
1322 case RTSP_STATE_IDLE:
1323 break;
1324 case RTSP_STATE_PLAYING:
1325 if (rtsp_read_play(s) != 0)
1326 return -1;
1327 break;
1328 case RTSP_STATE_PAUSED:
1329 rt->state = RTSP_STATE_IDLE;
1330 break;
1331 }
1332 return 0;
1333}
1334
1617ad97
FB
1335static int rtsp_read_close(AVFormatContext *s)
1336{
1337 RTSPState *rt = s->priv_data;
1617ad97 1338 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1339 char cmd[1024];
1340
b6892136 1341#if 0
1617ad97
FB
1342 /* NOTE: it is valid to flush the buffer here */
1343 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1344 url_fclose(&rt->rtsp_gb);
1345 }
b6892136 1346#endif
115329f1 1347 snprintf(cmd, sizeof(cmd),
b6892136 1348 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1349 s->filename);
1350 rtsp_send_cmd(s, cmd, reply, NULL);
1351
8b1ab7bf 1352 rtsp_close_streams(rt);
1617ad97
FB
1353 url_close(rt->rtsp_hd);
1354 return 0;
1355}
1356
96862926 1357#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1358AVInputFormat rtsp_demuxer = {
1617ad97 1359 "rtsp",
bde15e74 1360 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1361 sizeof(RTSPState),
1362 rtsp_probe,
1363 rtsp_read_header,
1364 rtsp_read_packet,
1365 rtsp_read_close,
ff762d6e 1366 rtsp_read_seek,
bb76a117 1367 .flags = AVFMT_NOFILE,
ff762d6e
FB
1368 .read_play = rtsp_read_play,
1369 .read_pause = rtsp_read_pause,
1617ad97 1370};
96862926 1371#endif
1617ad97 1372
cb1fdc61 1373static int sdp_probe(AVProbeData *p1)
93ced3e8 1374{
0e1ceacd 1375 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1376
1377 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1378 while (p < p_end && *p != '\0') {
f7d78f36 1379 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1380 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1381
1382 while(p < p_end - 1 && *p != '\n') p++;
1383 if (++p >= p_end)
cb1fdc61 1384 break;
cb1fdc61
FB
1385 if (*p == '\r')
1386 p++;
1387 }
93ced3e8
FB
1388 return 0;
1389}
1390
1391#define SDP_MAX_SIZE 8192
1392
1393static int sdp_read_header(AVFormatContext *s,
1394 AVFormatParameters *ap)
1395{
8b1ab7bf 1396 RTSPState *rt = s->priv_data;
93ced3e8
FB
1397 RTSPStream *rtsp_st;
1398 int size, i, err;
1399 char *content;
1400 char url[1024];
8b1ab7bf 1401 AVStream *st;
93ced3e8
FB
1402
1403 /* read the whole sdp file */
1404 /* XXX: better loading */
1405 content = av_malloc(SDP_MAX_SIZE);
899681cd 1406 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1407 if (size <= 0) {
1408 av_free(content);
1409 return AVERROR_INVALIDDATA;
1410 }
1411 content[size] ='\0';
1412
1413 sdp_parse(s, content);
1414 av_free(content);
1415
1416 /* open each RTP stream */
8b1ab7bf
FB
1417 for(i=0;i<rt->nb_rtsp_streams;i++) {
1418 rtsp_st = rt->rtsp_streams[i];
115329f1 1419
d2bf42be 1420 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1421 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1422 rtsp_st->sdp_port,
d2bf42be 1423 rtsp_st->sdp_port,
93ced3e8 1424 rtsp_st->sdp_ttl);
dbf30963 1425 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1426 err = AVERROR_INVALIDDATA;
1427 goto fail;
1428 }
8b1ab7bf
FB
1429 /* open the RTP context */
1430 st = NULL;
1431 if (rtsp_st->stream_index >= 0)
1432 st = s->streams[rtsp_st->stream_index];
1433 if (!st)
1434 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1435 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
8b1ab7bf 1436 if (!rtsp_st->rtp_ctx) {
769e10f0 1437 err = AVERROR(ENOMEM);
8b1ab7bf 1438 goto fail;
4934884a
RM
1439 } else {
1440 if(rtsp_st->dynamic_handler) {
1441 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1442 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1443 }
8b1ab7bf 1444 }
93ced3e8
FB
1445 }
1446 return 0;
1447 fail:
8b1ab7bf 1448 rtsp_close_streams(rt);
93ced3e8
FB
1449 return err;
1450}
1451
1452static int sdp_read_packet(AVFormatContext *s,
1453 AVPacket *pkt)
1454{
8b1ab7bf 1455 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1456}
1457
1458static int sdp_read_close(AVFormatContext *s)
1459{
8b1ab7bf
FB
1460 RTSPState *rt = s->priv_data;
1461 rtsp_close_streams(rt);
93ced3e8
FB
1462 return 0;
1463}
1464
ff70e601
MR
1465#ifdef CONFIG_SDP_DEMUXER
1466AVInputFormat sdp_demuxer = {
93ced3e8 1467 "sdp",
bde15e74 1468 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1469 sizeof(RTSPState),
1470 sdp_probe,
1471 sdp_read_header,
1472 sdp_read_packet,
1473 sdp_read_close,
1474};
ff70e601 1475#endif
93ced3e8 1476
e7047005 1477#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1478/* dummy redirector format (used directly in av_open_input_file now) */
1479static int redir_probe(AVProbeData *pd)
1480{
1481 const char *p;
1482 p = pd->buf;
1483 while (redir_isspace(*p))
1484 p++;
f7d78f36
MR
1485 if (av_strstart(p, "http://", NULL) ||
1486 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1487 return AVPROBE_SCORE_MAX;
1488 return 0;
1489}
1490
e8acf0ed 1491static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1492{
1493 char buf[4096], *q;
1494 int c;
1495 AVFormatContext *ic = NULL;
e8acf0ed 1496 ByteIOContext *f = s->pb;
1617ad97
FB
1497
1498 /* parse each URL and try to open it */
1499 c = url_fgetc(f);
1500 while (c != URL_EOF) {
1501 /* skip spaces */
1502 for(;;) {
1503 if (!redir_isspace(c))
1504 break;
1505 c = url_fgetc(f);
1506 }
1507 if (c == URL_EOF)
1508 break;
1509 /* record url */
1510 q = buf;
1511 for(;;) {
1512 if (c == URL_EOF || redir_isspace(c))
1513 break;
1514 if ((q - buf) < sizeof(buf) - 1)
1515 *q++ = c;
1516 c = url_fgetc(f);
1517 }
1518 *q = '\0';
1519 //printf("URL='%s'\n", buf);
1520 /* try to open the media file */
1521 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1522 break;
1523 }
1617ad97 1524 if (!ic)
6f3e0b21 1525 return AVERROR(EIO);
e8acf0ed
LA
1526
1527 *s = *ic;
1528 url_fclose(f);
1529
1530 return 0;
1617ad97
FB
1531}
1532
d2a067d1 1533AVInputFormat redir_demuxer = {
1617ad97 1534 "redir",
bde15e74 1535 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1536 0,
1537 redir_probe,
e8acf0ed 1538 redir_read_header,
1617ad97
FB
1539 NULL,
1540 NULL,
1541};
e7047005 1542#endif