Rename RTSPProtocol to RTSPLowerTransport, so that its name properly tells us
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
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3 * Copyright (c) 2002 Fabrice Bellard.
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
7246177d
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22/* needed by inet_aton() */
23#define _SVID_SOURCE
24
245976da 25#include "libavutil/avstring.h"
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26#include "avformat.h"
27
db0ed93e 28#include <sys/time.h>
6ad1c9c9 29#ifdef HAVE_SYS_SELECT_H
933bd8e2 30#include <sys/select.h>
6ad1c9c9 31#endif
ea452b54 32#include <strings.h>
42572ef5 33#include "network.h"
c971ff19 34#include "rtsp.h"
1617ad97 35
4934884a 36#include "rtp_internal.h"
e9dea59f 37#include "rdt.h"
4934884a 38
1617ad97 39//#define DEBUG
b6892136 40//#define DEBUG_RTP_TCP
1617ad97 41
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42enum RTSPClientState {
43 RTSP_STATE_IDLE,
44 RTSP_STATE_PLAYING,
45 RTSP_STATE_PAUSED,
46};
47
e0776043 48enum RTSPServerType {
2834c365 49 RTSP_SERVER_RTP, /*< Standard-compliant RTP-server */
2e889ae4 50 RTSP_SERVER_REAL, /*< Realmedia-style server */
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51 RTSP_SERVER_LAST
52};
53
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54typedef struct RTSPState {
55 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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56 int nb_rtsp_streams;
57 struct RTSPStream **rtsp_streams;
115329f1 58
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59 enum RTSPClientState state;
60 int64_t seek_timestamp;
115329f1 61
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62 /* XXX: currently we use unbuffered input */
63 // ByteIOContext rtsp_gb;
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64 int seq; /* RTSP command sequence number */
65 char session_id[512];
90abbdba 66 enum RTSPLowerTransport lower_transport;
e0776043 67 enum RTSPServerType server_type;
1617ad97 68 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 69 RTPDemuxContext *cur_rtp;
1256d16b 70 int need_subscription;
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71} RTSPState;
72
73typedef struct RTSPStream {
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74 URLContext *rtp_handle; /* RTP stream handle */
75 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 76
8b1ab7bf 77 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 78 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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79 char control_url[1024]; /* url for this stream (from SDP) */
80
81 int sdp_port; /* port (from SDP content - not used in RTSP) */
82 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
83 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
84 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 85 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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86
87 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
88 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
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89} RTSPStream;
90
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91static int rtsp_read_play(AVFormatContext *s);
92
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93/* XXX: currently, the only way to change the protocols consists in
94 changing this variable */
1617ad97 95
c482500f 96#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 97int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 98#endif
85fb7b34 99
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100static int rtsp_probe(AVProbeData *p)
101{
f7d78f36 102 if (av_strstart(p->filename, "rtsp:", NULL))
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103 return AVPROBE_SCORE_MAX;
104 return 0;
105}
106
107static int redir_isspace(int c)
108{
ccd425e7 109 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
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110}
111
112static void skip_spaces(const char **pp)
113{
114 const char *p;
115 p = *pp;
116 while (redir_isspace(*p))
117 p++;
118 *pp = p;
119}
120
115329f1 121static void get_word_sep(char *buf, int buf_size, const char *sep,
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122 const char **pp)
123{
124 const char *p;
125 char *q;
126
127 p = *pp;
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128 if (*p == '/')
129 p++;
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130 skip_spaces(&p);
131 q = buf;
132 while (!strchr(sep, *p) && *p != '\0') {
133 if ((q - buf) < buf_size - 1)
134 *q++ = *p;
135 p++;
136 }
137 if (buf_size > 0)
138 *q = '\0';
139 *pp = p;
140}
141
142static void get_word(char *buf, int buf_size, const char **pp)
143{
144 const char *p;
145 char *q;
146
147 p = *pp;
148 skip_spaces(&p);
149 q = buf;
150 while (!redir_isspace(*p) && *p != '\0') {
151 if ((q - buf) < buf_size - 1)
152 *q++ = *p;
153 p++;
154 }
155 if (buf_size > 0)
156 *q = '\0';
157 *pp = p;
158}
159
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160/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
161 params>] */
4934884a 162static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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163{
164 char buf[256];
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165 int i;
166 AVCodec *c;
7b49ce2e 167 const char *c_name;
93ced3e8 168
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169 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
170 see if we can handle this kind of payload */
93ced3e8 171 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 172 if (payload_type >= RTP_PT_PRIVATE) {
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173 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
174 while(handler) {
175 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
176 codec->codec_id = handler->codec_id;
177 rtsp_st->dynamic_handler= handler;
178 if(handler->open) {
179 rtsp_st->dynamic_protocol_context= handler->open();
180 }
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181 break;
182 }
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183 handler= handler->next;
184 }
93ced3e8 185 } else {
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186 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
187 /* search into AVRtpPayloadTypes[] */
7ed19d7f 188 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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189 }
190
191 c = avcodec_find_decoder(codec->codec_id);
192 if (c && c->name)
7b49ce2e 193 c_name = c->name;
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194 else
195 c_name = (char *)NULL;
196
197 if (c_name) {
198 get_word_sep(buf, sizeof(buf), "/", &p);
199 i = atoi(buf);
200 switch (codec->codec_type) {
201 case CODEC_TYPE_AUDIO:
202 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
203 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
204 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
205 if (i > 0) {
206 codec->sample_rate = i;
207 get_word_sep(buf, sizeof(buf), "/", &p);
208 i = atoi(buf);
209 if (i > 0)
210 codec->channels = i;
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211 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
212 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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213 }
214 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
215 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
216 break;
217 case CODEC_TYPE_VIDEO:
218 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
219 break;
220 default:
221 break;
222 }
223 return 0;
93ced3e8 224 }
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225
226 return -1;
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227}
228
229/* return the length and optionnaly the data */
230static int hex_to_data(uint8_t *data, const char *p)
231{
232 int c, len, v;
233
234 len = 0;
235 v = 1;
236 for(;;) {
237 skip_spaces(&p);
238 if (p == '\0')
239 break;
240 c = toupper((unsigned char)*p++);
241 if (c >= '0' && c <= '9')
242 c = c - '0';
243 else if (c >= 'A' && c <= 'F')
244 c = c - 'A' + 10;
245 else
246 break;
247 v = (v << 4) | c;
248 if (v & 0x100) {
249 if (data)
250 data[len] = v;
251 len++;
252 v = 1;
253 }
254 }
255 return len;
256}
257
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258static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
259{
260 switch (codec->codec_id) {
261 case CODEC_ID_MPEG4:
cbee7a69 262 case CODEC_ID_AAC:
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263 if (!strcmp(attr, "config")) {
264 /* decode the hexa encoded parameter */
265 int len = hex_to_data(NULL, value);
266 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
267 if (!codec->extradata)
268 return;
269 codec->extradata_size = len;
270 hex_to_data(codec->extradata, value);
271 }
272 break;
273 default:
274 break;
275 }
276 return;
277}
278
279typedef struct attrname_map
280{
7b49ce2e 281 const char *str;
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282 uint16_t type;
283 uint32_t offset;
284} attrname_map_t;
285
286/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
287#define ATTR_NAME_TYPE_INT 0
288#define ATTR_NAME_TYPE_STR 1
289static attrname_map_t attr_names[]=
290{
291 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
292 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
293 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
294 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
295 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
296 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
297 {NULL, -1, -1},
298};
299
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300/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
301* because it is used in rtp_h264.c, which is forthcoming.
302*/
303int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
304{
305 skip_spaces(p);
306 if(**p)
307 {
308 get_word_sep(attr, attr_size, "=", p);
309 if (**p == '=')
310 (*p)++;
311 get_word_sep(value, value_size, ";", p);
312 if (**p == ';')
313 (*p)++;
314 return 1;
315 }
316 return 0;
317}
318
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319/* parse a SDP line and save stream attributes */
320static void sdp_parse_fmtp(AVStream *st, const char *p)
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321{
322 char attr[256];
323 char value[4096];
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324 int i;
325
326 RTSPStream *rtsp_st = st->priv_data;
01f4895c 327 AVCodecContext *codec = st->codec;
d1ccf0e0 328 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
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329
330 /* loop on each attribute */
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331 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
332 {
bb270c08 333 /* grab the codec extra_data from the config parameter of the fmtp line */
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334 sdp_parse_fmtp_config(codec, attr, value);
335 /* Looking for a known attribute */
336 for (i = 0; attr_names[i].str; ++i) {
337 if (!strcasecmp(attr, attr_names[i].str)) {
338 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
339 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
340 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
341 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 342 }
93ced3e8 343 }
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344 }
345}
346
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347/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
348 * and end time.
349 * Used for seeking in the rtp stream.
350 */
351static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
352{
353 char buf[256];
354
355 skip_spaces(&p);
f7d78f36 356 if (!av_stristart(p, "npt=", &p))
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357 return;
358
359 *start = AV_NOPTS_VALUE;
360 *end = AV_NOPTS_VALUE;
361
362 get_word_sep(buf, sizeof(buf), "-", &p);
363 *start = parse_date(buf, 1);
364 if (*p == '-') {
365 p++;
366 get_word_sep(buf, sizeof(buf), "-", &p);
367 *end = parse_date(buf, 1);
368 }
369// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
370// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
371}
372
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373typedef struct SDPParseState {
374 /* SDP only */
375 struct in_addr default_ip;
376 int default_ttl;
377} SDPParseState;
378
379static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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380 int letter, const char *buf)
381{
8b1ab7bf 382 RTSPState *rt = s->priv_data;
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383 char buf1[64], st_type[64];
384 const char *p;
93ced3e8 385 int codec_type, payload_type, i;
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386 AVStream *st;
387 RTSPStream *rtsp_st;
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388 struct in_addr sdp_ip;
389 int ttl;
390
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391#ifdef DEBUG
392 printf("sdp: %c='%s'\n", letter, buf);
393#endif
394
395 p = buf;
396 switch(letter) {
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397 case 'c':
398 get_word(buf1, sizeof(buf1), &p);
399 if (strcmp(buf1, "IN") != 0)
400 return;
401 get_word(buf1, sizeof(buf1), &p);
402 if (strcmp(buf1, "IP4") != 0)
403 return;
404 get_word_sep(buf1, sizeof(buf1), "/", &p);
405 if (inet_aton(buf1, &sdp_ip) == 0)
406 return;
407 ttl = 16;
408 if (*p == '/') {
409 p++;
410 get_word_sep(buf1, sizeof(buf1), "/", &p);
411 ttl = atoi(buf1);
412 }
413 if (s->nb_streams == 0) {
414 s1->default_ip = sdp_ip;
415 s1->default_ttl = ttl;
416 } else {
417 st = s->streams[s->nb_streams - 1];
418 rtsp_st = st->priv_data;
419 rtsp_st->sdp_ip = sdp_ip;
420 rtsp_st->sdp_ttl = ttl;
421 }
422 break;
1617ad97 423 case 's':
75e61b0e 424 av_strlcpy(s->title, p, sizeof(s->title));
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425 break;
426 case 'i':
427 if (s->nb_streams == 0) {
75e61b0e 428 av_strlcpy(s->comment, p, sizeof(s->comment));
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429 break;
430 }
431 break;
432 case 'm':
433 /* new stream */
434 get_word(st_type, sizeof(st_type), &p);
435 if (!strcmp(st_type, "audio")) {
436 codec_type = CODEC_TYPE_AUDIO;
437 } else if (!strcmp(st_type, "video")) {
438 codec_type = CODEC_TYPE_VIDEO;
439 } else {
440 return;
441 }
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442 rtsp_st = av_mallocz(sizeof(RTSPStream));
443 if (!rtsp_st)
444 return;
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445 rtsp_st->stream_index = -1;
446 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
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447
448 rtsp_st->sdp_ip = s1->default_ip;
449 rtsp_st->sdp_ttl = s1->default_ttl;
450
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451 get_word(buf1, sizeof(buf1), &p); /* port */
452 rtsp_st->sdp_port = atoi(buf1);
453
454 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 455
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456 /* XXX: handle list of formats */
457 get_word(buf1, sizeof(buf1), &p); /* format list */
458 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 459
7ed19d7f 460 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
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FB
461 /* no corresponding stream */
462 } else {
463 st = av_new_stream(s, 0);
464 if (!st)
465 return;
466 st->priv_data = rtsp_st;
467 rtsp_st->stream_index = st->index;
01f4895c 468 st->codec->codec_type = codec_type;
d1ccf0e0 469 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 470 /* if standard payload type, we can find the codec right now */
01f4895c 471 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
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FB
472 }
473 }
1617ad97 474 /* put a default control url */
75e61b0e 475 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
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476 break;
477 case 'a':
f7d78f36 478 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
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479 char proto[32];
480 /* get the control url */
481 st = s->streams[s->nb_streams - 1];
482 rtsp_st = st->priv_data;
115329f1 483
1617ad97 484 /* XXX: may need to add full url resolution */
6ba5cbc6 485 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
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486 if (proto[0] == '\0') {
487 /* relative control URL */
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MR
488 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
489 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 490 } else {
75e61b0e 491 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 492 }
f7d78f36 493 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 494 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 495 get_word(buf1, sizeof(buf1), &p);
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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 501 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
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502 }
503 }
f7d78f36 504 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 505 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 506 get_word(buf1, sizeof(buf1), &p);
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507 payload_type = atoi(buf1);
508 for(i = 0; i < s->nb_streams;i++) {
509 st = s->streams[i];
510 rtsp_st = st->priv_data;
511 if (rtsp_st->sdp_payload_type == payload_type) {
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RM
512 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
513 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
514 sdp_parse_fmtp(st, p);
515 }
516 } else {
ed787542 517 sdp_parse_fmtp(st, p);
4934884a 518 }
93ced3e8
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519 }
520 }
f7d78f36 521 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
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522 // let dynamic protocol handlers have a stab at the line.
523 get_word(buf1, sizeof(buf1), &p);
524 payload_type = atoi(buf1);
525 for(i = 0; i < s->nb_streams;i++) {
526 st = s->streams[i];
527 rtsp_st = st->priv_data;
528 if (rtsp_st->sdp_payload_type == payload_type) {
529 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
530 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
531 }
532 }
533 }
f7d78f36 534 } else if(av_strstart(p, "range:", &p)) {
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535 int64_t start, end;
536
537 // this is so that seeking on a streamed file can work.
538 rtsp_parse_range_npt(p, &start, &end);
539 s->start_time= start;
540 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
8646b907
RB
541 } else if (s->nb_streams > 0) {
542 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
543 if (rtsp_st->dynamic_handler &&
544 rtsp_st->dynamic_handler->parse_sdp_a_line)
545 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
546 rtsp_st->dynamic_protocol_context, buf);
1617ad97
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547 }
548 break;
549 }
550}
551
5c91a675 552static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
553{
554 const char *p;
555 int letter;
d6bb9ebd 556 char buf[2048], *q;
93ced3e8 557 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 558
93ced3e8 559 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
560 p = content;
561 for(;;) {
562 skip_spaces(&p);
563 letter = *p;
564 if (letter == '\0')
565 break;
566 p++;
567 if (*p != '=')
568 goto next_line;
569 p++;
570 /* get the content */
571 q = buf;
b6892136 572 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
573 if ((q - buf) < sizeof(buf) - 1)
574 *q++ = *p;
575 p++;
576 }
577 *q = '\0';
93ced3e8 578 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
579 next_line:
580 while (*p != '\n' && *p != '\0')
581 p++;
582 if (*p == '\n')
583 p++;
584 }
585 return 0;
586}
587
588static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
589{
590 const char *p;
591 int v;
592
593 p = *pp;
594 skip_spaces(&p);
595 v = strtol(p, (char **)&p, 10);
596 if (*p == '-') {
597 p++;
598 *min_ptr = v;
599 v = strtol(p, (char **)&p, 10);
600 *max_ptr = v;
601 } else {
602 *min_ptr = v;
603 *max_ptr = v;
604 }
605 *pp = p;
606}
607
608/* XXX: only one transport specification is parsed */
609static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
610{
611 char transport_protocol[16];
612 char profile[16];
613 char lower_transport[16];
614 char parameter[16];
615 RTSPTransportField *th;
616 char buf[256];
115329f1 617
1617ad97 618 reply->nb_transports = 0;
115329f1 619
1617ad97
FB
620 for(;;) {
621 skip_spaces(&p);
622 if (*p == '\0')
623 break;
624
625 th = &reply->transports[reply->nb_transports];
626
115329f1 627 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
628 "/", &p);
629 if (*p == '/')
630 p++;
e1502118 631 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
632 get_word_sep(profile, sizeof(profile), "/;,", &p);
633 lower_transport[0] = '\0';
634 /* rtp/avp/<protocol> */
635 if (*p == '/') {
636 p++;
637 get_word_sep(lower_transport, sizeof(lower_transport),
638 ";,", &p);
639 }
640 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
641 /* x-pn-tng/<protocol> */
e1502118
LB
642 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
643 profile[0] = '\0';
1617ad97 644 }
b6892136 645 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 646 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 647 else
90abbdba 648 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 649
1617ad97
FB
650 if (*p == ';')
651 p++;
652 /* get each parameter */
653 while (*p != '\0' && *p != ',') {
654 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
655 if (!strcmp(parameter, "port")) {
656 if (*p == '=') {
657 p++;
658 rtsp_parse_range(&th->port_min, &th->port_max, &p);
659 }
660 } else if (!strcmp(parameter, "client_port")) {
661 if (*p == '=') {
662 p++;
115329f1 663 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
664 &th->client_port_max, &p);
665 }
666 } else if (!strcmp(parameter, "server_port")) {
667 if (*p == '=') {
668 p++;
115329f1 669 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
670 &th->server_port_max, &p);
671 }
672 } else if (!strcmp(parameter, "interleaved")) {
673 if (*p == '=') {
674 p++;
115329f1 675 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
676 &th->interleaved_max, &p);
677 }
678 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
679 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
680 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
681 } else if (!strcmp(parameter, "ttl")) {
682 if (*p == '=') {
683 p++;
684 th->ttl = strtol(p, (char **)&p, 10);
685 }
686 } else if (!strcmp(parameter, "destination")) {
687 struct in_addr ipaddr;
688
689 if (*p == '=') {
690 p++;
691 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 692 if (inet_aton(buf, &ipaddr))
1617ad97
FB
693 th->destination = ntohl(ipaddr.s_addr);
694 }
695 }
696 while (*p != ';' && *p != '\0' && *p != ',')
697 p++;
698 if (*p == ';')
699 p++;
700 }
701 if (*p == ',')
702 p++;
703
704 reply->nb_transports++;
705 }
706}
707
708void rtsp_parse_line(RTSPHeader *reply, const char *buf)
709{
710 const char *p;
711
712 /* NOTE: we do case independent match for broken servers */
713 p = buf;
f7d78f36 714 if (av_stristart(p, "Session:", &p)) {
1617ad97 715 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 716 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 717 reply->content_length = strtol(p, NULL, 10);
f7d78f36 718 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 719 rtsp_parse_transport(reply, p);
f7d78f36 720 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 721 reply->seq = strtol(p, NULL, 10);
f7d78f36 722 } else if (av_stristart(p, "Range:", &p)) {
31693e00 723 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
724 } else if (av_stristart(p, "RealChallenge1:", &p)) {
725 skip_spaces(&p);
726 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1617ad97
FB
727 }
728}
729
2a42b5c3
LS
730static int url_readbuf(URLContext *h, unsigned char *buf, int size)
731{
732 int ret, len;
733
734 len = 0;
735 while (len < size) {
736 ret = url_read(h, buf+len, size-len);
737 if (ret < 1)
738 return ret;
739 len += ret;
740 }
741 return len;
742}
743
b7b8fc34
FB
744/* skip a RTP/TCP interleaved packet */
745static void rtsp_skip_packet(AVFormatContext *s)
746{
747 RTSPState *rt = s->priv_data;
748 int ret, len, len1;
749 uint8_t buf[1024];
750
2a42b5c3 751 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
752 if (ret != 3)
753 return;
80fb8234 754 len = AV_RB16(buf + 1);
b7b8fc34
FB
755#ifdef DEBUG
756 printf("skipping RTP packet len=%d\n", len);
757#endif
758 /* skip payload */
759 while (len > 0) {
760 len1 = len;
761 if (len1 > sizeof(buf))
762 len1 = sizeof(buf);
2a42b5c3 763 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
764 if (ret != len1)
765 return;
766 len -= len1;
767 }
768}
1617ad97 769
115329f1
DB
770static void rtsp_send_cmd(AVFormatContext *s,
771 const char *cmd, RTSPHeader *reply,
1617ad97
FB
772 unsigned char **content_ptr)
773{
774 RTSPState *rt = s->priv_data;
775 char buf[4096], buf1[1024], *q;
776 unsigned char ch;
777 const char *p;
778 int content_length, line_count;
779 unsigned char *content = NULL;
780
781 memset(reply, 0, sizeof(RTSPHeader));
782
783 rt->seq++;
75e61b0e 784 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 785 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 786 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 787 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 788 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 789 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 790 }
75e61b0e 791 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
792#ifdef DEBUG
793 printf("Sending:\n%s--\n", buf);
794#endif
795 url_write(rt->rtsp_hd, buf, strlen(buf));
796
797 /* parse reply (XXX: use buffers) */
798 line_count = 0;
799 rt->last_reply[0] = '\0';
800 for(;;) {
801 q = buf;
802 for(;;) {
2a42b5c3 803 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
804 break;
805 if (ch == '\n')
806 break;
b7b8fc34
FB
807 if (ch == '$') {
808 /* XXX: only parse it if first char on line ? */
809 rtsp_skip_packet(s);
810 } else if (ch != '\r') {
1617ad97
FB
811 if ((q - buf) < sizeof(buf) - 1)
812 *q++ = ch;
813 }
814 }
815 *q = '\0';
816#ifdef DEBUG
817 printf("line='%s'\n", buf);
818#endif
819 /* test if last line */
820 if (buf[0] == '\0')
821 break;
822 p = buf;
823 if (line_count == 0) {
824 /* get reply code */
825 get_word(buf1, sizeof(buf1), &p);
826 get_word(buf1, sizeof(buf1), &p);
827 reply->status_code = atoi(buf1);
828 } else {
829 rtsp_parse_line(reply, p);
75e61b0e
MR
830 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
831 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
832 }
833 line_count++;
834 }
115329f1 835
1617ad97 836 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 837 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 838
1617ad97
FB
839 content_length = reply->content_length;
840 if (content_length > 0) {
841 /* leave some room for a trailing '\0' (useful for simple parsing) */
842 content = av_malloc(content_length + 1);
2a42b5c3 843 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
844 content[content_length] = '\0';
845 }
846 if (content_ptr)
847 *content_ptr = content;
e2e2e7dd
AB
848 else
849 av_free(content);
1617ad97
FB
850}
851
1617ad97 852
8b1ab7bf
FB
853/* close and free RTSP streams */
854static void rtsp_close_streams(RTSPState *rt)
855{
856 int i;
857 RTSPStream *rtsp_st;
858
859 for(i=0;i<rt->nb_rtsp_streams;i++) {
860 rtsp_st = rt->rtsp_streams[i];
861 if (rtsp_st) {
862 if (rtsp_st->rtp_ctx)
863 rtp_parse_close(rtsp_st->rtp_ctx);
864 if (rtsp_st->rtp_handle)
865 url_close(rtsp_st->rtp_handle);
4934884a
RM
866 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
867 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 868 }
8b1ab7bf
FB
869 }
870 av_free(rt->rtsp_streams);
871}
872
ee0cb67f
RB
873static int
874rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
875{
876 AVStream *st = NULL;
877
a6789dca
RB
878 /* open the RTP context */
879 if (rtsp_st->stream_index >= 0)
880 st = s->streams[rtsp_st->stream_index];
881 if (!st)
882 s->ctx_flags |= AVFMTCTX_NOHEADER;
883 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
884
885 if (!rtsp_st->rtp_ctx) {
886 return AVERROR(ENOMEM);
887 } else {
888 if(rtsp_st->dynamic_handler) {
889 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
890 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
ee0cb67f 891 }
a6789dca 892 }
ee0cb67f
RB
893
894 return 0;
895}
896
53620bba
RB
897/**
898 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
899 */
900static int
e9dea59f 901make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 902 int lower_transport, const char *real_challenge)
1617ad97
FB
903{
904 RTSPState *rt = s->priv_data;
53620bba 905 int j, i, err;
1617ad97 906 RTSPStream *rtsp_st;
53620bba
RB
907 RTSPHeader reply1, *reply = &reply1;
908 char cmd[2048];
e9dea59f
RB
909 const char *trans_pref;
910
2e889ae4 911 if (rt->server_type == RTSP_SERVER_REAL)
e9dea59f
RB
912 trans_pref = "x-pn-tng";
913 else
914 trans_pref = "RTP/AVP";
115329f1 915
1617ad97
FB
916 /* for each stream, make the setup request */
917 /* XXX: we assume the same server is used for the control of each
918 RTSP stream */
d1ccf0e0
RD
919
920 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
921 char transport[2048];
922
8b1ab7bf 923 rtsp_st = rt->rtsp_streams[i];
1617ad97 924
1617ad97 925 /* RTP/UDP */
90abbdba 926 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 927 char buf[256];
85fb7b34
FB
928
929 /* first try in specified port range */
d1ccf0e0
RD
930 if (RTSP_RTP_PORT_MIN != 0) {
931 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 932 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 933 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 934 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 935 goto rtp_opened;
d1ccf0e0 936 }
85fb7b34 937 }
1617ad97 938 }
85fb7b34 939
d1ccf0e0
RD
940/* then try on any port
941** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
942** err = AVERROR_INVALIDDATA;
943** goto fail;
944** }
945*/
85fb7b34
FB
946
947 rtp_opened:
8b1ab7bf 948 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 949 snprintf(transport, sizeof(transport) - 1,
e9dea59f
RB
950 "%s/UDP;unicast;client_port=%d",
951 trans_pref, port);
952 if (rt->server_type == RTSP_SERVER_RTP)
953 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
954 }
955
956 /* RTP/TCP */
90abbdba 957 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
0ad306bc 958 snprintf(transport, sizeof(transport) - 1,
e9dea59f 959 "%s/TCP", trans_pref);
1617ad97
FB
960 }
961
90abbdba 962 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 963 snprintf(transport, sizeof(transport) - 1,
e9dea59f 964 "%s/UDP;multicast", trans_pref);
1617ad97 965 }
2e889ae4 966 if (rt->server_type == RTSP_SERVER_REAL)
e9dea59f 967 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 968 snprintf(cmd, sizeof(cmd),
b6892136
FB
969 "SETUP %s RTSP/1.0\r\n"
970 "Transport: %s\r\n",
1617ad97 971 rtsp_st->control_url, transport);
2e889ae4 972 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
973 char real_res[41], real_csum[9];
974 ff_rdt_calc_response_and_checksum(real_res, real_csum,
975 real_challenge);
976 av_strlcatf(cmd, sizeof(cmd),
977 "If-Match: %s\r\n"
978 "RealChallenge2: %s, sd=%s\r\n",
979 rt->session_id, real_res, real_csum);
980 }
1617ad97 981 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
982 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
983 err = 1;
984 goto fail;
7e6ca34f
RB
985 } else if (reply->status_code != RTSP_STATUS_OK ||
986 reply->nb_transports != 1) {
1617ad97
FB
987 err = AVERROR_INVALIDDATA;
988 goto fail;
989 }
990
991 /* XXX: same protocol for all streams is required */
992 if (i > 0) {
90abbdba 993 if (reply->transports[0].lower_transport != rt->lower_transport) {
1617ad97
FB
994 err = AVERROR_INVALIDDATA;
995 goto fail;
996 }
997 } else {
90abbdba 998 rt->lower_transport = reply->transports[0].lower_transport;
1617ad97
FB
999 }
1000
1001 /* close RTP connection if not choosen */
90abbdba
RB
1002 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1003 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1004 url_close(rtsp_st->rtp_handle);
1005 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1006 }
1007
90abbdba
RB
1008 switch(reply->transports[0].lower_transport) {
1009 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1010 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1011 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1012 break;
115329f1 1013
90abbdba 1014 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
1015 {
1016 char url[1024];
115329f1 1017
1617ad97 1018 /* XXX: also use address if specified */
115329f1 1019 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1020 host, reply->transports[0].server_port_min);
8b1ab7bf 1021 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1022 err = AVERROR_INVALIDDATA;
1023 goto fail;
1024 }
1025 }
1026 break;
90abbdba 1027 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1028 {
1029 char url[1024];
d02678ec 1030 struct in_addr in;
1617ad97 1031
d02678ec 1032 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1033 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1034 inet_ntoa(in),
1035 reply->transports[0].port_min,
1036 reply->transports[0].ttl);
dbf30963 1037 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1038 err = AVERROR_INVALIDDATA;
1039 goto fail;
1040 }
1041 }
1042 break;
1043 }
d1ccf0e0 1044
ee0cb67f 1045 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1046 goto fail;
1617ad97
FB
1047 }
1048
2e889ae4 1049 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1050 rt->need_subscription = 1;
1051
53620bba
RB
1052 return 0;
1053
1054fail:
8a8754d8
RB
1055 for (i=0; i<rt->nb_rtsp_streams; i++) {
1056 if (rt->rtsp_streams[i]->rtp_handle) {
1057 url_close(rt->rtsp_streams[i]->rtp_handle);
1058 rt->rtsp_streams[i]->rtp_handle = NULL;
1059 }
1060 }
53620bba
RB
1061 return err;
1062}
1063
1064static int rtsp_read_header(AVFormatContext *s,
1065 AVFormatParameters *ap)
1066{
1067 RTSPState *rt = s->priv_data;
1068 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1069 URLContext *rtsp_hd;
1070 int port, ret, err;
1071 RTSPHeader reply1, *reply = &reply1;
1072 unsigned char *content = NULL;
90abbdba 1073 int lower_transport_mask = 0;
1cf151e9 1074 char real_challenge[64];
53620bba
RB
1075
1076 /* extract hostname and port */
1077 url_split(NULL, 0, NULL, 0,
1078 host, sizeof(host), &port, path, sizeof(path), s->filename);
1079 if (port < 0)
1080 port = RTSP_DEFAULT_PORT;
1081
1082 /* search for options */
1083 option_list = strchr(path, '?');
1084 if (option_list) {
1085 /* remove the options from the path */
1086 *option_list++ = 0;
1087 while(option_list) {
1088 /* move the option pointer */
1089 option = option_list;
1090 option_list = strchr(option_list, '&');
1091 if (option_list)
1092 *(option_list++) = 0;
1093 /* handle the options */
1094 if (strcmp(option, "udp") == 0)
90abbdba 1095 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1096 else if (strcmp(option, "multicast") == 0)
90abbdba 1097 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1098 else if (strcmp(option, "tcp") == 0)
90abbdba 1099 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1100 }
1101 }
1102
90abbdba
RB
1103 if (!lower_transport_mask)
1104 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
53620bba
RB
1105
1106 /* open the tcp connexion */
1107 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1108 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1109 return AVERROR(EIO);
1110 rt->rtsp_hd = rtsp_hd;
1111 rt->seq = 0;
1112
1cf151e9
RB
1113 /* request options supported by the server; this also detects server type */
1114 for (rt->server_type = RTSP_SERVER_RTP;;) {
1115 snprintf(cmd, sizeof(cmd),
1116 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1117 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1118 av_strlcat(cmd,
1119 /**
1120 * The following entries are required for proper
1121 * streaming from a Realmedia server. They are
1122 * interdependent in some way although we currently
1123 * don't quite understand how. Values were copied
1124 * from mplayer SVN r23589.
1125 * @param CompanyID is a 16-byte ID in base64
1126 * @param ClientChallenge is a 16-byte ID in hex
1127 */
1128 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1129 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1130 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1131 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1132 sizeof(cmd));
1133 rtsp_send_cmd(s, cmd, reply, NULL);
1134 if (reply->status_code != RTSP_STATUS_OK) {
1135 err = AVERROR_INVALIDDATA;
1136 goto fail;
1137 }
1138
1139 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1140 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1141 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1142 continue;
2e889ae4 1143 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1144 strcpy(real_challenge, reply->real_challenge);
1145 }
1146 break;
1147 }
1148
53620bba
RB
1149 /* describe the stream */
1150 snprintf(cmd, sizeof(cmd),
1151 "DESCRIBE %s RTSP/1.0\r\n"
1152 "Accept: application/sdp\r\n",
1153 s->filename);
2e889ae4 1154 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1155 /**
1156 * The Require: attribute is needed for proper streaming from
1157 * Realmedia servers.
1158 */
1159 av_strlcat(cmd,
1160 "Require: com.real.retain-entity-for-setup\r\n",
1161 sizeof(cmd));
1162 }
53620bba
RB
1163 rtsp_send_cmd(s, cmd, reply, &content);
1164 if (!content) {
1165 err = AVERROR_INVALIDDATA;
1166 goto fail;
1167 }
1168 if (reply->status_code != RTSP_STATUS_OK) {
1169 err = AVERROR_INVALIDDATA;
1170 goto fail;
1171 }
1172
1173 /* now we got the SDP description, we parse it */
1174 ret = sdp_parse(s, (const char *)content);
1175 av_freep(&content);
1176 if (ret < 0) {
1177 err = AVERROR_INVALIDDATA;
1178 goto fail;
1179 }
1180
8a8754d8 1181 do {
90abbdba 1182 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1183
90abbdba 1184 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1185 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1186 real_challenge : NULL);
8a8754d8 1187 if (err < 0)
7e6ca34f 1188 goto fail;
90abbdba
RB
1189 lower_transport_mask &= ~(1 << lower_transport);
1190 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1191 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1192 goto fail;
1193 }
1194 } while (err);
53620bba 1195
ff762d6e
FB
1196 rt->state = RTSP_STATE_IDLE;
1197 rt->seek_timestamp = 0; /* default is to start stream at position
1198 zero */
c04c3282 1199 if (ap->initial_pause) {
ff762d6e
FB
1200 /* do not start immediately */
1201 } else {
1202 if (rtsp_read_play(s) < 0) {
1203 err = AVERROR_INVALIDDATA;
1617ad97
FB
1204 goto fail;
1205 }
1206 }
1617ad97
FB
1207 return 0;
1208 fail:
8b1ab7bf 1209 rtsp_close_streams(rt);
1617ad97
FB
1210 av_freep(&content);
1211 url_close(rt->rtsp_hd);
1212 return err;
1213}
1214
8b1ab7bf
FB
1215static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1216 uint8_t *buf, int buf_size)
1617ad97
FB
1217{
1218 RTSPState *rt = s->priv_data;
b6892136 1219 int id, len, i, ret;
1617ad97 1220 RTSPStream *rtsp_st;
1617ad97 1221
b6892136
FB
1222#ifdef DEBUG_RTP_TCP
1223 printf("tcp_read_packet:\n");
1224#endif
1617ad97
FB
1225 redo:
1226 for(;;) {
2a42b5c3 1227 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1228#ifdef DEBUG_RTP_TCP
1229 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1230#endif
1231 if (ret != 1)
8b1ab7bf 1232 return -1;
b6892136 1233 if (buf[0] == '$')
1617ad97
FB
1234 break;
1235 }
2a42b5c3 1236 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1237 if (ret != 3)
8b1ab7bf 1238 return -1;
b6892136 1239 id = buf[0];
80fb8234 1240 len = AV_RB16(buf + 1);
b6892136
FB
1241#ifdef DEBUG_RTP_TCP
1242 printf("id=%d len=%d\n", id, len);
1243#endif
8b1ab7bf 1244 if (len > buf_size || len < 12)
1617ad97
FB
1245 goto redo;
1246 /* get the data */
2a42b5c3 1247 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1248 if (ret != len)
8b1ab7bf 1249 return -1;
115329f1 1250
1617ad97 1251 /* find the matching stream */
8b1ab7bf
FB
1252 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1253 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1254 if (id >= rtsp_st->interleaved_min &&
1255 id <= rtsp_st->interleaved_max)
1617ad97
FB
1256 goto found;
1257 }
1258 goto redo;
1259 found:
8b1ab7bf
FB
1260 *prtsp_st = rtsp_st;
1261 return len;
1617ad97
FB
1262}
1263
115329f1 1264static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1265 uint8_t *buf, int buf_size)
1617ad97 1266{
8b1ab7bf 1267 RTSPState *rt = s->priv_data;
1617ad97
FB
1268 RTSPStream *rtsp_st;
1269 fd_set rfds;
1270 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1271 struct timeval tv;
1272
1273 for(;;) {
b7b8fc34 1274 if (url_interrupt_cb())
a960a1e0 1275 return AVERROR(EINTR);
1617ad97
FB
1276 FD_ZERO(&rfds);
1277 fd_max = -1;
8b1ab7bf
FB
1278 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1279 rtsp_st = rt->rtsp_streams[i];
1617ad97 1280 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1281 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1282 if (fd1 > fd_max)
1283 fd_max = fd1;
1284 FD_SET(fd1, &rfds);
1285 }
1617ad97 1286 tv.tv_sec = 0;
b7b8fc34 1287 tv.tv_usec = 100 * 1000;
1617ad97
FB
1288 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1289 if (n > 0) {
8b1ab7bf
FB
1290 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1291 rtsp_st = rt->rtsp_streams[i];
1292 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1293 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1294 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1295 if (ret > 0) {
1296 *prtsp_st = rtsp_st;
1617ad97
FB
1297 return ret;
1298 }
1299 }
1300 }
1301 }
1302 }
1303}
1304
1305static int rtsp_read_packet(AVFormatContext *s,
1306 AVPacket *pkt)
1307{
1308 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1309 RTSPStream *rtsp_st;
1310 int ret, len;
1311 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1312
2e889ae4 1313 if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1256d16b
RB
1314 int i;
1315 RTSPHeader reply1, *reply = &reply1;
1316 char cmd[1024];
1317
1318 snprintf(cmd, sizeof(cmd),
1319 "SET_PARAMETER %s RTSP/1.0\r\n"
1320 "Subscribe: ",
1321 s->filename);
1322 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1323 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
1324 ff_rdt_subscribe_rule(
1325 rt->rtsp_streams[i]->rtp_ctx,
1326 cmd, sizeof(cmd), i, 0);
1327 }
1328 av_strlcat(cmd, "\r\n", sizeof(cmd));
1329 rtsp_send_cmd(s, cmd, reply, NULL);
1330 if (reply->status_code != RTSP_STATUS_OK)
1331 return AVERROR_INVALIDDATA;
1332 rt->need_subscription = 0;
1333
1334 if (rt->state == RTSP_STATE_PLAYING)
1335 rtsp_read_play (s);
1336 }
1337
8b1ab7bf
FB
1338 /* get next frames from the same RTP packet */
1339 if (rt->cur_rtp) {
2e889ae4 1340 if (rt->server_type == RTSP_SERVER_REAL)
4fce284c
RB
1341 ret = ff_rdt_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1342 else
1343 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
8b1ab7bf
FB
1344 if (ret == 0) {
1345 rt->cur_rtp = NULL;
1346 return 0;
1347 } else if (ret == 1) {
1348 return 0;
1349 } else {
1350 rt->cur_rtp = NULL;
1351 }
1352 }
1617ad97 1353
8b1ab7bf
FB
1354 /* read next RTP packet */
1355 redo:
90abbdba 1356 switch(rt->lower_transport) {
1617ad97 1357 default:
90abbdba 1358 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1359 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1360 break;
90abbdba
RB
1361 case RTSP_LOWER_TRANSPORT_UDP:
1362 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1363 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
74ef8b43 1364 if (len >=0 && rtsp_st->rtp_ctx)
dbf30963 1365 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1366 break;
1367 }
8b1ab7bf 1368 if (len < 0)
489b0d4d 1369 return len;
2e889ae4 1370 if (rt->server_type == RTSP_SERVER_REAL)
4fce284c
RB
1371 ret = ff_rdt_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1372 else
1373 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
8b1ab7bf
FB
1374 if (ret < 0)
1375 goto redo;
1376 if (ret == 1) {
1377 /* more packets may follow, so we save the RTP context */
1378 rt->cur_rtp = rtsp_st->rtp_ctx;
1379 }
1380 return 0;
1617ad97
FB
1381}
1382
ff762d6e 1383static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1384{
ff762d6e 1385 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1386 RTSPHeader reply1, *reply = &reply1;
1387 char cmd[1024];
1388
bc874dae 1389 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1390
2e889ae4 1391 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1392 if (rt->state == RTSP_STATE_PAUSED) {
1393 snprintf(cmd, sizeof(cmd),
1394 "PLAY %s RTSP/1.0\r\n",
1395 s->filename);
1396 } else {
1397 snprintf(cmd, sizeof(cmd),
1398 "PLAY %s RTSP/1.0\r\n"
1399 "Range: npt=%0.3f-\r\n",
1400 s->filename,
1401 (double)rt->seek_timestamp / AV_TIME_BASE);
1402 }
1403 rtsp_send_cmd(s, cmd, reply, NULL);
1404 if (reply->status_code != RTSP_STATUS_OK) {
1405 return -1;
1406 }
1256d16b 1407 }
5f86057f
RB
1408 rt->state = RTSP_STATE_PLAYING;
1409 return 0;
b7b8fc34
FB
1410}
1411
ff762d6e
FB
1412/* pause the stream */
1413static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1414{
ff762d6e 1415 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1416 RTSPHeader reply1, *reply = &reply1;
1417 char cmd[1024];
1418
b7b8fc34 1419 rt = s->priv_data;
115329f1 1420
ff762d6e
FB
1421 if (rt->state != RTSP_STATE_PLAYING)
1422 return 0;
2e889ae4 1423 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1424 snprintf(cmd, sizeof(cmd),
1425 "PAUSE %s RTSP/1.0\r\n",
1426 s->filename);
1427 rtsp_send_cmd(s, cmd, reply, NULL);
1428 if (reply->status_code != RTSP_STATUS_OK) {
1429 return -1;
1430 }
1256d16b 1431 }
5f86057f
RB
1432 rt->state = RTSP_STATE_PAUSED;
1433 return 0;
b7b8fc34
FB
1434}
1435
115329f1 1436static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1437 int64_t timestamp, int flags)
ff762d6e
FB
1438{
1439 RTSPState *rt = s->priv_data;
115329f1 1440
50755217 1441 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1442 switch(rt->state) {
1443 default:
1444 case RTSP_STATE_IDLE:
1445 break;
1446 case RTSP_STATE_PLAYING:
1447 if (rtsp_read_play(s) != 0)
1448 return -1;
1449 break;
1450 case RTSP_STATE_PAUSED:
1451 rt->state = RTSP_STATE_IDLE;
1452 break;
1453 }
1454 return 0;
1455}
1456
1617ad97
FB
1457static int rtsp_read_close(AVFormatContext *s)
1458{
1459 RTSPState *rt = s->priv_data;
1617ad97 1460 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1461 char cmd[1024];
1462
b6892136 1463#if 0
1617ad97 1464 /* NOTE: it is valid to flush the buffer here */
90abbdba 1465 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1466 url_fclose(&rt->rtsp_gb);
1467 }
b6892136 1468#endif
115329f1 1469 snprintf(cmd, sizeof(cmd),
b6892136 1470 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1471 s->filename);
1472 rtsp_send_cmd(s, cmd, reply, NULL);
1473
8b1ab7bf 1474 rtsp_close_streams(rt);
1617ad97
FB
1475 url_close(rt->rtsp_hd);
1476 return 0;
1477}
1478
96862926 1479#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1480AVInputFormat rtsp_demuxer = {
1617ad97 1481 "rtsp",
bde15e74 1482 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1483 sizeof(RTSPState),
1484 rtsp_probe,
1485 rtsp_read_header,
1486 rtsp_read_packet,
1487 rtsp_read_close,
ff762d6e 1488 rtsp_read_seek,
bb76a117 1489 .flags = AVFMT_NOFILE,
ff762d6e
FB
1490 .read_play = rtsp_read_play,
1491 .read_pause = rtsp_read_pause,
1617ad97 1492};
96862926 1493#endif
1617ad97 1494
cb1fdc61 1495static int sdp_probe(AVProbeData *p1)
93ced3e8 1496{
0e1ceacd 1497 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1498
1499 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1500 while (p < p_end && *p != '\0') {
f7d78f36 1501 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1502 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1503
1504 while(p < p_end - 1 && *p != '\n') p++;
1505 if (++p >= p_end)
cb1fdc61 1506 break;
cb1fdc61
FB
1507 if (*p == '\r')
1508 p++;
1509 }
93ced3e8
FB
1510 return 0;
1511}
1512
1513#define SDP_MAX_SIZE 8192
1514
1515static int sdp_read_header(AVFormatContext *s,
1516 AVFormatParameters *ap)
1517{
8b1ab7bf 1518 RTSPState *rt = s->priv_data;
93ced3e8
FB
1519 RTSPStream *rtsp_st;
1520 int size, i, err;
1521 char *content;
1522 char url[1024];
1523
1524 /* read the whole sdp file */
1525 /* XXX: better loading */
1526 content = av_malloc(SDP_MAX_SIZE);
899681cd 1527 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1528 if (size <= 0) {
1529 av_free(content);
1530 return AVERROR_INVALIDDATA;
1531 }
1532 content[size] ='\0';
1533
1534 sdp_parse(s, content);
1535 av_free(content);
1536
1537 /* open each RTP stream */
8b1ab7bf
FB
1538 for(i=0;i<rt->nb_rtsp_streams;i++) {
1539 rtsp_st = rt->rtsp_streams[i];
115329f1 1540
d2bf42be 1541 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1542 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1543 rtsp_st->sdp_port,
d2bf42be 1544 rtsp_st->sdp_port,
93ced3e8 1545 rtsp_st->sdp_ttl);
dbf30963 1546 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1547 err = AVERROR_INVALIDDATA;
1548 goto fail;
1549 }
ee0cb67f 1550 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1551 goto fail;
93ced3e8
FB
1552 }
1553 return 0;
1554 fail:
8b1ab7bf 1555 rtsp_close_streams(rt);
93ced3e8
FB
1556 return err;
1557}
1558
1559static int sdp_read_packet(AVFormatContext *s,
1560 AVPacket *pkt)
1561{
8b1ab7bf 1562 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1563}
1564
1565static int sdp_read_close(AVFormatContext *s)
1566{
8b1ab7bf
FB
1567 RTSPState *rt = s->priv_data;
1568 rtsp_close_streams(rt);
93ced3e8
FB
1569 return 0;
1570}
1571
ff70e601
MR
1572#ifdef CONFIG_SDP_DEMUXER
1573AVInputFormat sdp_demuxer = {
93ced3e8 1574 "sdp",
bde15e74 1575 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1576 sizeof(RTSPState),
1577 sdp_probe,
1578 sdp_read_header,
1579 sdp_read_packet,
1580 sdp_read_close,
1581};
ff70e601 1582#endif
93ced3e8 1583
e7047005 1584#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1585/* dummy redirector format (used directly in av_open_input_file now) */
1586static int redir_probe(AVProbeData *pd)
1587{
1588 const char *p;
1589 p = pd->buf;
1590 while (redir_isspace(*p))
1591 p++;
f7d78f36
MR
1592 if (av_strstart(p, "http://", NULL) ||
1593 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1594 return AVPROBE_SCORE_MAX;
1595 return 0;
1596}
1597
e8acf0ed 1598static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1599{
1600 char buf[4096], *q;
1601 int c;
1602 AVFormatContext *ic = NULL;
e8acf0ed 1603 ByteIOContext *f = s->pb;
1617ad97
FB
1604
1605 /* parse each URL and try to open it */
1606 c = url_fgetc(f);
1607 while (c != URL_EOF) {
1608 /* skip spaces */
1609 for(;;) {
1610 if (!redir_isspace(c))
1611 break;
1612 c = url_fgetc(f);
1613 }
1614 if (c == URL_EOF)
1615 break;
1616 /* record url */
1617 q = buf;
1618 for(;;) {
1619 if (c == URL_EOF || redir_isspace(c))
1620 break;
1621 if ((q - buf) < sizeof(buf) - 1)
1622 *q++ = c;
1623 c = url_fgetc(f);
1624 }
1625 *q = '\0';
1626 //printf("URL='%s'\n", buf);
1627 /* try to open the media file */
1628 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1629 break;
1630 }
1617ad97 1631 if (!ic)
6f3e0b21 1632 return AVERROR(EIO);
e8acf0ed
LA
1633
1634 *s = *ic;
1635 url_fclose(f);
1636
1637 return 0;
1617ad97
FB
1638}
1639
d2a067d1 1640AVInputFormat redir_demuxer = {
1617ad97 1641 "redir",
bde15e74 1642 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1643 0,
1644 redir_probe,
e8acf0ed 1645 redir_read_header,
1617ad97
FB
1646 NULL,
1647 NULL,
1648};
e7047005 1649#endif