Parse the OpaqueData field for every AVStream represented by this "set of
[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
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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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54enum RTSPTransport {
55 RTSP_TRANSPORT_RTP,
56 RTSP_TRANSPORT_RDT,
57 RTSP_TRANSPORT_LAST
58};
59
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60typedef struct RTSPState {
61 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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62 int nb_rtsp_streams;
63 struct RTSPStream **rtsp_streams;
115329f1 64
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65 enum RTSPClientState state;
66 int64_t seek_timestamp;
115329f1 67
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68 /* XXX: currently we use unbuffered input */
69 // ByteIOContext rtsp_gb;
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70 int seq; /* RTSP command sequence number */
71 char session_id[512];
119b4668 72 enum RTSPTransport transport;
90abbdba 73 enum RTSPLowerTransport lower_transport;
e0776043 74 enum RTSPServerType server_type;
1617ad97 75 char last_reply[2048]; /* XXX: allocate ? */
5465b0d4 76 void *cur_tx;
1256d16b 77 int need_subscription;
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78} RTSPState;
79
80typedef struct RTSPStream {
8b1ab7bf 81 URLContext *rtp_handle; /* RTP stream handle */
5465b0d4 82 void *tx_ctx; /* RTP/RDT parse context */
115329f1 83
8b1ab7bf 84 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 85 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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86 char control_url[1024]; /* url for this stream (from SDP) */
87
88 int sdp_port; /* port (from SDP content - not used in RTSP) */
89 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
90 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
91 int sdp_payload_type; /* payload type - only used in SDP */
be73a544 92 RTPPayloadData rtp_payload_data; /* rtp payload parsing infos from SDP */
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93
94 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
ed0aacc7 95 PayloadContext *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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96} RTSPStream;
97
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98static int rtsp_read_play(AVFormatContext *s);
99
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100/* XXX: currently, the only way to change the protocols consists in
101 changing this variable */
1617ad97 102
c482500f 103#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 104int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 105#endif
85fb7b34 106
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107static int rtsp_probe(AVProbeData *p)
108{
f7d78f36 109 if (av_strstart(p->filename, "rtsp:", NULL))
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110 return AVPROBE_SCORE_MAX;
111 return 0;
112}
113
114static int redir_isspace(int c)
115{
ccd425e7 116 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
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117}
118
119static void skip_spaces(const char **pp)
120{
121 const char *p;
122 p = *pp;
123 while (redir_isspace(*p))
124 p++;
125 *pp = p;
126}
127
115329f1 128static void get_word_sep(char *buf, int buf_size, const char *sep,
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129 const char **pp)
130{
131 const char *p;
132 char *q;
133
134 p = *pp;
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135 if (*p == '/')
136 p++;
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137 skip_spaces(&p);
138 q = buf;
139 while (!strchr(sep, *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
149static void get_word(char *buf, int buf_size, const char **pp)
150{
151 const char *p;
152 char *q;
153
154 p = *pp;
155 skip_spaces(&p);
156 q = buf;
157 while (!redir_isspace(*p) && *p != '\0') {
158 if ((q - buf) < buf_size - 1)
159 *q++ = *p;
160 p++;
161 }
162 if (buf_size > 0)
163 *q = '\0';
164 *pp = p;
165}
166
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167/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
168 params>] */
4934884a 169static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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170{
171 char buf[256];
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172 int i;
173 AVCodec *c;
7b49ce2e 174 const char *c_name;
93ced3e8 175
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176 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
177 see if we can handle this kind of payload */
93ced3e8 178 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 179 if (payload_type >= RTP_PT_PRIVATE) {
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180 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
181 while(handler) {
182 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
183 codec->codec_id = handler->codec_id;
184 rtsp_st->dynamic_handler= handler;
185 if(handler->open) {
186 rtsp_st->dynamic_protocol_context= handler->open();
187 }
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188 break;
189 }
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190 handler= handler->next;
191 }
93ced3e8 192 } else {
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193 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
194 /* search into AVRtpPayloadTypes[] */
7ed19d7f 195 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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196 }
197
198 c = avcodec_find_decoder(codec->codec_id);
199 if (c && c->name)
7b49ce2e 200 c_name = c->name;
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201 else
202 c_name = (char *)NULL;
203
204 if (c_name) {
205 get_word_sep(buf, sizeof(buf), "/", &p);
206 i = atoi(buf);
207 switch (codec->codec_type) {
208 case CODEC_TYPE_AUDIO:
209 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
210 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
211 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
212 if (i > 0) {
213 codec->sample_rate = i;
214 get_word_sep(buf, sizeof(buf), "/", &p);
215 i = atoi(buf);
216 if (i > 0)
217 codec->channels = i;
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218 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
219 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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220 }
221 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
222 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
223 break;
224 case CODEC_TYPE_VIDEO:
225 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
226 break;
227 default:
228 break;
229 }
230 return 0;
93ced3e8 231 }
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232
233 return -1;
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234}
235
236/* return the length and optionnaly the data */
237static int hex_to_data(uint8_t *data, const char *p)
238{
239 int c, len, v;
240
241 len = 0;
242 v = 1;
243 for(;;) {
244 skip_spaces(&p);
245 if (p == '\0')
246 break;
247 c = toupper((unsigned char)*p++);
248 if (c >= '0' && c <= '9')
249 c = c - '0';
250 else if (c >= 'A' && c <= 'F')
251 c = c - 'A' + 10;
252 else
253 break;
254 v = (v << 4) | c;
255 if (v & 0x100) {
256 if (data)
257 data[len] = v;
258 len++;
259 v = 1;
260 }
261 }
262 return len;
263}
264
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265static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
266{
267 switch (codec->codec_id) {
268 case CODEC_ID_MPEG4:
cbee7a69 269 case CODEC_ID_AAC:
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270 if (!strcmp(attr, "config")) {
271 /* decode the hexa encoded parameter */
272 int len = hex_to_data(NULL, value);
273 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
274 if (!codec->extradata)
275 return;
276 codec->extradata_size = len;
277 hex_to_data(codec->extradata, value);
278 }
279 break;
280 default:
281 break;
282 }
283 return;
284}
285
644e7acb 286typedef struct {
7b49ce2e 287 const char *str;
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288 uint16_t type;
289 uint32_t offset;
644e7acb 290} AttrNameMap;
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291
292/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
293#define ATTR_NAME_TYPE_INT 0
294#define ATTR_NAME_TYPE_STR 1
644e7acb 295static const AttrNameMap attr_names[]=
d1ccf0e0 296{
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297 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
298 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
299 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
300 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
301 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
302 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
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303 {NULL, -1, -1},
304};
305
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306/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
307* because it is used in rtp_h264.c, which is forthcoming.
308*/
309int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
310{
311 skip_spaces(p);
312 if(**p)
313 {
314 get_word_sep(attr, attr_size, "=", p);
315 if (**p == '=')
316 (*p)++;
317 get_word_sep(value, value_size, ";", p);
318 if (**p == ';')
319 (*p)++;
320 return 1;
321 }
322 return 0;
323}
324
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325/* parse a SDP line and save stream attributes */
326static void sdp_parse_fmtp(AVStream *st, const char *p)
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327{
328 char attr[256];
329 char value[4096];
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330 int i;
331
332 RTSPStream *rtsp_st = st->priv_data;
01f4895c 333 AVCodecContext *codec = st->codec;
be73a544 334 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
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335
336 /* loop on each attribute */
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337 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
338 {
bb270c08 339 /* grab the codec extra_data from the config parameter of the fmtp line */
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340 sdp_parse_fmtp_config(codec, attr, value);
341 /* Looking for a known attribute */
342 for (i = 0; attr_names[i].str; ++i) {
343 if (!strcasecmp(attr, attr_names[i].str)) {
344 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
345 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
346 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
347 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 348 }
93ced3e8 349 }
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350 }
351}
352
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353/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
354 * and end time.
355 * Used for seeking in the rtp stream.
356 */
357static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
358{
359 char buf[256];
360
361 skip_spaces(&p);
f7d78f36 362 if (!av_stristart(p, "npt=", &p))
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363 return;
364
365 *start = AV_NOPTS_VALUE;
366 *end = AV_NOPTS_VALUE;
367
368 get_word_sep(buf, sizeof(buf), "-", &p);
369 *start = parse_date(buf, 1);
370 if (*p == '-') {
371 p++;
372 get_word_sep(buf, sizeof(buf), "-", &p);
373 *end = parse_date(buf, 1);
374 }
375// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
376// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
377}
378
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379typedef struct SDPParseState {
380 /* SDP only */
381 struct in_addr default_ip;
382 int default_ttl;
383} SDPParseState;
384
385static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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386 int letter, const char *buf)
387{
8b1ab7bf 388 RTSPState *rt = s->priv_data;
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389 char buf1[64], st_type[64];
390 const char *p;
fb65d2ca
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391 enum CodecType codec_type;
392 int payload_type, i;
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393 AVStream *st;
394 RTSPStream *rtsp_st;
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395 struct in_addr sdp_ip;
396 int ttl;
397
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398#ifdef DEBUG
399 printf("sdp: %c='%s'\n", letter, buf);
400#endif
401
402 p = buf;
403 switch(letter) {
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404 case 'c':
405 get_word(buf1, sizeof(buf1), &p);
406 if (strcmp(buf1, "IN") != 0)
407 return;
408 get_word(buf1, sizeof(buf1), &p);
409 if (strcmp(buf1, "IP4") != 0)
410 return;
411 get_word_sep(buf1, sizeof(buf1), "/", &p);
412 if (inet_aton(buf1, &sdp_ip) == 0)
413 return;
414 ttl = 16;
415 if (*p == '/') {
416 p++;
417 get_word_sep(buf1, sizeof(buf1), "/", &p);
418 ttl = atoi(buf1);
419 }
420 if (s->nb_streams == 0) {
421 s1->default_ip = sdp_ip;
422 s1->default_ttl = ttl;
423 } else {
424 st = s->streams[s->nb_streams - 1];
425 rtsp_st = st->priv_data;
426 rtsp_st->sdp_ip = sdp_ip;
427 rtsp_st->sdp_ttl = ttl;
428 }
429 break;
1617ad97 430 case 's':
75e61b0e 431 av_strlcpy(s->title, p, sizeof(s->title));
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432 break;
433 case 'i':
434 if (s->nb_streams == 0) {
75e61b0e 435 av_strlcpy(s->comment, p, sizeof(s->comment));
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436 break;
437 }
438 break;
439 case 'm':
440 /* new stream */
441 get_word(st_type, sizeof(st_type), &p);
442 if (!strcmp(st_type, "audio")) {
443 codec_type = CODEC_TYPE_AUDIO;
444 } else if (!strcmp(st_type, "video")) {
445 codec_type = CODEC_TYPE_VIDEO;
446 } else {
447 return;
448 }
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449 rtsp_st = av_mallocz(sizeof(RTSPStream));
450 if (!rtsp_st)
451 return;
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452 rtsp_st->stream_index = -1;
453 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
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454
455 rtsp_st->sdp_ip = s1->default_ip;
456 rtsp_st->sdp_ttl = s1->default_ttl;
457
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458 get_word(buf1, sizeof(buf1), &p); /* port */
459 rtsp_st->sdp_port = atoi(buf1);
460
461 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 462
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463 /* XXX: handle list of formats */
464 get_word(buf1, sizeof(buf1), &p); /* format list */
465 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 466
7ed19d7f 467 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
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FB
468 /* no corresponding stream */
469 } else {
470 st = av_new_stream(s, 0);
471 if (!st)
472 return;
473 st->priv_data = rtsp_st;
474 rtsp_st->stream_index = st->index;
01f4895c 475 st->codec->codec_type = codec_type;
d1ccf0e0 476 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 477 /* if standard payload type, we can find the codec right now */
01f4895c 478 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
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FB
479 }
480 }
1617ad97 481 /* put a default control url */
75e61b0e 482 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
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483 break;
484 case 'a':
f7d78f36 485 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
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486 char proto[32];
487 /* get the control url */
488 st = s->streams[s->nb_streams - 1];
489 rtsp_st = st->priv_data;
115329f1 490
1617ad97 491 /* XXX: may need to add full url resolution */
6ba5cbc6 492 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
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493 if (proto[0] == '\0') {
494 /* relative control URL */
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MR
495 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
496 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 497 } else {
75e61b0e 498 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 499 }
f7d78f36 500 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 501 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 502 get_word(buf1, sizeof(buf1), &p);
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503 payload_type = atoi(buf1);
504 for(i = 0; i < s->nb_streams;i++) {
505 st = s->streams[i];
506 rtsp_st = st->priv_data;
507 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 508 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
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509 }
510 }
f7d78f36 511 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 512 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 513 get_word(buf1, sizeof(buf1), &p);
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514 payload_type = atoi(buf1);
515 for(i = 0; i < s->nb_streams;i++) {
516 st = s->streams[i];
517 rtsp_st = st->priv_data;
518 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 519 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 520 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
4934884a
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521 sdp_parse_fmtp(st, p);
522 }
523 } else {
ed787542 524 sdp_parse_fmtp(st, p);
4934884a 525 }
93ced3e8
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526 }
527 }
f7d78f36 528 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
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529 // let dynamic protocol handlers have a stab at the line.
530 get_word(buf1, sizeof(buf1), &p);
531 payload_type = atoi(buf1);
532 for(i = 0; i < s->nb_streams;i++) {
533 st = s->streams[i];
534 rtsp_st = st->priv_data;
535 if (rtsp_st->sdp_payload_type == payload_type) {
536 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
7b2a0708 537 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
d0deedcb
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538 }
539 }
540 }
f7d78f36 541 } else if(av_strstart(p, "range:", &p)) {
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542 int64_t start, end;
543
544 // this is so that seeking on a streamed file can work.
545 rtsp_parse_range_npt(p, &start, &end);
546 s->start_time= start;
547 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
119b4668
RB
548 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
549 if (atoi(p) == 1)
550 rt->transport = RTSP_TRANSPORT_RDT;
8646b907 551 } else if (s->nb_streams > 0) {
3ca45429
RB
552 if (rt->server_type == RTSP_SERVER_REAL)
553 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
554
8646b907
RB
555 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
556 if (rtsp_st->dynamic_handler &&
557 rtsp_st->dynamic_handler->parse_sdp_a_line)
7b2a0708 558 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
8646b907 559 rtsp_st->dynamic_protocol_context, buf);
1617ad97
FB
560 }
561 break;
562 }
563}
564
5c91a675 565static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
566{
567 const char *p;
568 int letter;
b965ff35
RB
569 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams, contain long SDP
570 * lines containing complete ASF Headers (several kB) or arrays of MDPR (RM stream
571 * descriptor) headers plus "rulebooks" describing their properties. Therefore, the
572 * SDP line buffer is large. */
e322d3f5 573 char buf[8192], *q;
93ced3e8 574 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 575
93ced3e8 576 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
577 p = content;
578 for(;;) {
579 skip_spaces(&p);
580 letter = *p;
581 if (letter == '\0')
582 break;
583 p++;
584 if (*p != '=')
585 goto next_line;
586 p++;
587 /* get the content */
588 q = buf;
b6892136 589 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
590 if ((q - buf) < sizeof(buf) - 1)
591 *q++ = *p;
592 p++;
593 }
594 *q = '\0';
93ced3e8 595 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
596 next_line:
597 while (*p != '\n' && *p != '\0')
598 p++;
599 if (*p == '\n')
600 p++;
601 }
602 return 0;
603}
604
605static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
606{
607 const char *p;
608 int v;
609
610 p = *pp;
611 skip_spaces(&p);
612 v = strtol(p, (char **)&p, 10);
613 if (*p == '-') {
614 p++;
615 *min_ptr = v;
616 v = strtol(p, (char **)&p, 10);
617 *max_ptr = v;
618 } else {
619 *min_ptr = v;
620 *max_ptr = v;
621 }
622 *pp = p;
623}
624
625/* XXX: only one transport specification is parsed */
626static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
627{
628 char transport_protocol[16];
629 char profile[16];
630 char lower_transport[16];
631 char parameter[16];
632 RTSPTransportField *th;
633 char buf[256];
115329f1 634
1617ad97 635 reply->nb_transports = 0;
115329f1 636
1617ad97
FB
637 for(;;) {
638 skip_spaces(&p);
639 if (*p == '\0')
640 break;
641
642 th = &reply->transports[reply->nb_transports];
643
115329f1 644 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
645 "/", &p);
646 if (*p == '/')
647 p++;
e1502118 648 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
649 get_word_sep(profile, sizeof(profile), "/;,", &p);
650 lower_transport[0] = '\0';
651 /* rtp/avp/<protocol> */
652 if (*p == '/') {
653 p++;
654 get_word_sep(lower_transport, sizeof(lower_transport),
655 ";,", &p);
119b4668
RB
656 }
657 th->transport = RTSP_TRANSPORT_RTP;
658 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
659 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 660 /* x-pn-tng/<protocol> */
e1502118
LB
661 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
662 profile[0] = '\0';
119b4668 663 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 664 }
b6892136 665 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 666 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 667 else
90abbdba 668 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 669
1617ad97
FB
670 if (*p == ';')
671 p++;
672 /* get each parameter */
673 while (*p != '\0' && *p != ',') {
674 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
675 if (!strcmp(parameter, "port")) {
676 if (*p == '=') {
677 p++;
678 rtsp_parse_range(&th->port_min, &th->port_max, &p);
679 }
680 } else if (!strcmp(parameter, "client_port")) {
681 if (*p == '=') {
682 p++;
115329f1 683 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
684 &th->client_port_max, &p);
685 }
686 } else if (!strcmp(parameter, "server_port")) {
687 if (*p == '=') {
688 p++;
115329f1 689 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
690 &th->server_port_max, &p);
691 }
692 } else if (!strcmp(parameter, "interleaved")) {
693 if (*p == '=') {
694 p++;
115329f1 695 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
696 &th->interleaved_max, &p);
697 }
698 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
699 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
700 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
701 } else if (!strcmp(parameter, "ttl")) {
702 if (*p == '=') {
703 p++;
704 th->ttl = strtol(p, (char **)&p, 10);
705 }
706 } else if (!strcmp(parameter, "destination")) {
707 struct in_addr ipaddr;
708
709 if (*p == '=') {
710 p++;
711 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 712 if (inet_aton(buf, &ipaddr))
1617ad97
FB
713 th->destination = ntohl(ipaddr.s_addr);
714 }
715 }
716 while (*p != ';' && *p != '\0' && *p != ',')
717 p++;
718 if (*p == ';')
719 p++;
720 }
721 if (*p == ',')
722 p++;
723
724 reply->nb_transports++;
725 }
726}
727
728void rtsp_parse_line(RTSPHeader *reply, const char *buf)
729{
730 const char *p;
731
732 /* NOTE: we do case independent match for broken servers */
733 p = buf;
f7d78f36 734 if (av_stristart(p, "Session:", &p)) {
1617ad97 735 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 736 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 737 reply->content_length = strtol(p, NULL, 10);
f7d78f36 738 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 739 rtsp_parse_transport(reply, p);
f7d78f36 740 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 741 reply->seq = strtol(p, NULL, 10);
f7d78f36 742 } else if (av_stristart(p, "Range:", &p)) {
31693e00 743 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
744 } else if (av_stristart(p, "RealChallenge1:", &p)) {
745 skip_spaces(&p);
746 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1617ad97
FB
747 }
748}
749
2a42b5c3
LS
750static int url_readbuf(URLContext *h, unsigned char *buf, int size)
751{
752 int ret, len;
753
754 len = 0;
755 while (len < size) {
756 ret = url_read(h, buf+len, size-len);
757 if (ret < 1)
758 return ret;
759 len += ret;
760 }
761 return len;
762}
763
b7b8fc34
FB
764/* skip a RTP/TCP interleaved packet */
765static void rtsp_skip_packet(AVFormatContext *s)
766{
767 RTSPState *rt = s->priv_data;
768 int ret, len, len1;
769 uint8_t buf[1024];
770
2a42b5c3 771 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
772 if (ret != 3)
773 return;
80fb8234 774 len = AV_RB16(buf + 1);
b7b8fc34
FB
775#ifdef DEBUG
776 printf("skipping RTP packet len=%d\n", len);
777#endif
778 /* skip payload */
779 while (len > 0) {
780 len1 = len;
781 if (len1 > sizeof(buf))
782 len1 = sizeof(buf);
2a42b5c3 783 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
784 if (ret != len1)
785 return;
786 len -= len1;
787 }
788}
1617ad97 789
115329f1
DB
790static void rtsp_send_cmd(AVFormatContext *s,
791 const char *cmd, RTSPHeader *reply,
1617ad97
FB
792 unsigned char **content_ptr)
793{
794 RTSPState *rt = s->priv_data;
795 char buf[4096], buf1[1024], *q;
796 unsigned char ch;
797 const char *p;
798 int content_length, line_count;
799 unsigned char *content = NULL;
800
801 memset(reply, 0, sizeof(RTSPHeader));
802
803 rt->seq++;
75e61b0e 804 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 805 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 806 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 807 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 808 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 809 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 810 }
75e61b0e 811 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
812#ifdef DEBUG
813 printf("Sending:\n%s--\n", buf);
814#endif
815 url_write(rt->rtsp_hd, buf, strlen(buf));
816
817 /* parse reply (XXX: use buffers) */
818 line_count = 0;
819 rt->last_reply[0] = '\0';
820 for(;;) {
821 q = buf;
822 for(;;) {
2a42b5c3 823 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
824 break;
825 if (ch == '\n')
826 break;
b7b8fc34
FB
827 if (ch == '$') {
828 /* XXX: only parse it if first char on line ? */
829 rtsp_skip_packet(s);
830 } else if (ch != '\r') {
1617ad97
FB
831 if ((q - buf) < sizeof(buf) - 1)
832 *q++ = ch;
833 }
834 }
835 *q = '\0';
836#ifdef DEBUG
837 printf("line='%s'\n", buf);
838#endif
839 /* test if last line */
840 if (buf[0] == '\0')
841 break;
842 p = buf;
843 if (line_count == 0) {
844 /* get reply code */
845 get_word(buf1, sizeof(buf1), &p);
846 get_word(buf1, sizeof(buf1), &p);
847 reply->status_code = atoi(buf1);
848 } else {
849 rtsp_parse_line(reply, p);
75e61b0e
MR
850 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
851 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
852 }
853 line_count++;
854 }
115329f1 855
1617ad97 856 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 857 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 858
1617ad97
FB
859 content_length = reply->content_length;
860 if (content_length > 0) {
861 /* leave some room for a trailing '\0' (useful for simple parsing) */
862 content = av_malloc(content_length + 1);
2a42b5c3 863 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
864 content[content_length] = '\0';
865 }
866 if (content_ptr)
867 *content_ptr = content;
e2e2e7dd
AB
868 else
869 av_free(content);
1617ad97
FB
870}
871
1617ad97 872
8b1ab7bf
FB
873/* close and free RTSP streams */
874static void rtsp_close_streams(RTSPState *rt)
875{
876 int i;
877 RTSPStream *rtsp_st;
878
879 for(i=0;i<rt->nb_rtsp_streams;i++) {
880 rtsp_st = rt->rtsp_streams[i];
881 if (rtsp_st) {
accc248f
RB
882 if (rtsp_st->tx_ctx) {
883 if (rt->transport == RTSP_TRANSPORT_RDT)
884 ff_rdt_parse_close(rtsp_st->tx_ctx);
885 else
5c918b27 886 rtp_parse_close(rtsp_st->tx_ctx);
accc248f 887 }
8b1ab7bf
FB
888 if (rtsp_st->rtp_handle)
889 url_close(rtsp_st->rtp_handle);
4934884a
RM
890 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
891 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 892 }
8b1ab7bf
FB
893 }
894 av_free(rt->rtsp_streams);
895}
896
ee0cb67f
RB
897static int
898rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
899{
accc248f 900 RTSPState *rt = s->priv_data;
ee0cb67f
RB
901 AVStream *st = NULL;
902
a6789dca
RB
903 /* open the RTP context */
904 if (rtsp_st->stream_index >= 0)
905 st = s->streams[rtsp_st->stream_index];
906 if (!st)
907 s->ctx_flags |= AVFMTCTX_NOHEADER;
accc248f
RB
908
909 if (rt->transport == RTSP_TRANSPORT_RDT)
e0d1eabf 910 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
accc248f
RB
911 rtsp_st->dynamic_protocol_context,
912 rtsp_st->dynamic_handler);
913 else
5c918b27
RB
914 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
915 rtsp_st->sdp_payload_type,
916 &rtsp_st->rtp_payload_data);
a6789dca 917
5465b0d4 918 if (!rtsp_st->tx_ctx) {
a6789dca 919 return AVERROR(ENOMEM);
accc248f 920 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
a6789dca 921 if(rtsp_st->dynamic_handler) {
5465b0d4 922 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
99a1d191
RB
923 rtsp_st->dynamic_protocol_context,
924 rtsp_st->dynamic_handler);
ee0cb67f 925 }
a6789dca 926 }
ee0cb67f
RB
927
928 return 0;
929}
930
53620bba
RB
931/**
932 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
933 */
934static int
e9dea59f 935make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 936 int lower_transport, const char *real_challenge)
1617ad97
FB
937{
938 RTSPState *rt = s->priv_data;
53620bba 939 int j, i, err;
1617ad97 940 RTSPStream *rtsp_st;
53620bba
RB
941 RTSPHeader reply1, *reply = &reply1;
942 char cmd[2048];
e9dea59f
RB
943 const char *trans_pref;
944
119b4668 945 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
946 trans_pref = "x-pn-tng";
947 else
948 trans_pref = "RTP/AVP";
115329f1 949
1617ad97
FB
950 /* for each stream, make the setup request */
951 /* XXX: we assume the same server is used for the control of each
952 RTSP stream */
d1ccf0e0
RD
953
954 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
955 char transport[2048];
956
8b1ab7bf 957 rtsp_st = rt->rtsp_streams[i];
1617ad97 958
1617ad97 959 /* RTP/UDP */
90abbdba 960 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 961 char buf[256];
85fb7b34
FB
962
963 /* first try in specified port range */
d1ccf0e0
RD
964 if (RTSP_RTP_PORT_MIN != 0) {
965 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 966 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 967 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 968 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 969 goto rtp_opened;
d1ccf0e0 970 }
85fb7b34 971 }
1617ad97 972 }
85fb7b34 973
d1ccf0e0
RD
974/* then try on any port
975** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
976** err = AVERROR_INVALIDDATA;
977** goto fail;
978** }
979*/
85fb7b34
FB
980
981 rtp_opened:
8b1ab7bf 982 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 983 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
984 "%s/UDP;", trans_pref);
985 if (rt->server_type != RTSP_SERVER_REAL)
986 av_strlcat(transport, "unicast;", sizeof(transport));
987 av_strlcatf(transport, sizeof(transport),
988 "client_port=%d", port);
119b4668 989 if (rt->transport == RTSP_TRANSPORT_RTP)
e9dea59f 990 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
991 }
992
993 /* RTP/TCP */
90abbdba 994 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
0ad306bc 995 snprintf(transport, sizeof(transport) - 1,
e9dea59f 996 "%s/TCP", trans_pref);
1617ad97
FB
997 }
998
90abbdba 999 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1000 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1001 "%s/UDP;multicast", trans_pref);
1617ad97 1002 }
2e889ae4 1003 if (rt->server_type == RTSP_SERVER_REAL)
e9dea59f 1004 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1005 snprintf(cmd, sizeof(cmd),
b6892136
FB
1006 "SETUP %s RTSP/1.0\r\n"
1007 "Transport: %s\r\n",
1617ad97 1008 rtsp_st->control_url, transport);
2e889ae4 1009 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1010 char real_res[41], real_csum[9];
1011 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1012 real_challenge);
1013 av_strlcatf(cmd, sizeof(cmd),
1014 "If-Match: %s\r\n"
1015 "RealChallenge2: %s, sd=%s\r\n",
1016 rt->session_id, real_res, real_csum);
1017 }
1617ad97 1018 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
1019 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1020 err = 1;
1021 goto fail;
7e6ca34f
RB
1022 } else if (reply->status_code != RTSP_STATUS_OK ||
1023 reply->nb_transports != 1) {
1617ad97
FB
1024 err = AVERROR_INVALIDDATA;
1025 goto fail;
1026 }
1027
1028 /* XXX: same protocol for all streams is required */
1029 if (i > 0) {
119b4668
RB
1030 if (reply->transports[0].lower_transport != rt->lower_transport ||
1031 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1032 err = AVERROR_INVALIDDATA;
1033 goto fail;
1034 }
1035 } else {
90abbdba 1036 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1037 rt->transport = reply->transports[0].transport;
1617ad97
FB
1038 }
1039
1040 /* close RTP connection if not choosen */
90abbdba
RB
1041 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1042 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1043 url_close(rtsp_st->rtp_handle);
1044 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1045 }
1046
90abbdba
RB
1047 switch(reply->transports[0].lower_transport) {
1048 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1049 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1050 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1051 break;
115329f1 1052
90abbdba 1053 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
1054 {
1055 char url[1024];
115329f1 1056
1617ad97 1057 /* XXX: also use address if specified */
115329f1 1058 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1059 host, reply->transports[0].server_port_min);
8b1ab7bf 1060 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1061 err = AVERROR_INVALIDDATA;
1062 goto fail;
1063 }
1064 }
1065 break;
90abbdba 1066 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1067 {
1068 char url[1024];
d02678ec 1069 struct in_addr in;
1617ad97 1070
d02678ec 1071 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1072 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1073 inet_ntoa(in),
1074 reply->transports[0].port_min,
1075 reply->transports[0].ttl);
dbf30963 1076 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1077 err = AVERROR_INVALIDDATA;
1078 goto fail;
1079 }
1080 }
1081 break;
1082 }
d1ccf0e0 1083
ee0cb67f 1084 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1085 goto fail;
1617ad97
FB
1086 }
1087
2e889ae4 1088 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1089 rt->need_subscription = 1;
1090
53620bba
RB
1091 return 0;
1092
1093fail:
8a8754d8
RB
1094 for (i=0; i<rt->nb_rtsp_streams; i++) {
1095 if (rt->rtsp_streams[i]->rtp_handle) {
1096 url_close(rt->rtsp_streams[i]->rtp_handle);
1097 rt->rtsp_streams[i]->rtp_handle = NULL;
1098 }
1099 }
53620bba
RB
1100 return err;
1101}
1102
1103static int rtsp_read_header(AVFormatContext *s,
1104 AVFormatParameters *ap)
1105{
1106 RTSPState *rt = s->priv_data;
1107 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1108 URLContext *rtsp_hd;
1109 int port, ret, err;
1110 RTSPHeader reply1, *reply = &reply1;
1111 unsigned char *content = NULL;
90abbdba 1112 int lower_transport_mask = 0;
1cf151e9 1113 char real_challenge[64];
53620bba
RB
1114
1115 /* extract hostname and port */
1116 url_split(NULL, 0, NULL, 0,
1117 host, sizeof(host), &port, path, sizeof(path), s->filename);
1118 if (port < 0)
1119 port = RTSP_DEFAULT_PORT;
1120
1121 /* search for options */
1122 option_list = strchr(path, '?');
1123 if (option_list) {
1124 /* remove the options from the path */
1125 *option_list++ = 0;
1126 while(option_list) {
1127 /* move the option pointer */
1128 option = option_list;
1129 option_list = strchr(option_list, '&');
1130 if (option_list)
1131 *(option_list++) = 0;
1132 /* handle the options */
1133 if (strcmp(option, "udp") == 0)
90abbdba 1134 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1135 else if (strcmp(option, "multicast") == 0)
90abbdba 1136 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1137 else if (strcmp(option, "tcp") == 0)
90abbdba 1138 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1139 }
1140 }
1141
90abbdba
RB
1142 if (!lower_transport_mask)
1143 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
53620bba
RB
1144
1145 /* open the tcp connexion */
1146 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1147 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1148 return AVERROR(EIO);
1149 rt->rtsp_hd = rtsp_hd;
1150 rt->seq = 0;
1151
1cf151e9
RB
1152 /* request options supported by the server; this also detects server type */
1153 for (rt->server_type = RTSP_SERVER_RTP;;) {
1154 snprintf(cmd, sizeof(cmd),
1155 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1156 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1157 av_strlcat(cmd,
1158 /**
1159 * The following entries are required for proper
1160 * streaming from a Realmedia server. They are
1161 * interdependent in some way although we currently
1162 * don't quite understand how. Values were copied
1163 * from mplayer SVN r23589.
1164 * @param CompanyID is a 16-byte ID in base64
1165 * @param ClientChallenge is a 16-byte ID in hex
1166 */
1167 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1168 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1169 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1170 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1171 sizeof(cmd));
1172 rtsp_send_cmd(s, cmd, reply, NULL);
1173 if (reply->status_code != RTSP_STATUS_OK) {
1174 err = AVERROR_INVALIDDATA;
1175 goto fail;
1176 }
1177
1178 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1179 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1180 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1181 continue;
2e889ae4 1182 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1183 strcpy(real_challenge, reply->real_challenge);
1184 }
1185 break;
1186 }
1187
53620bba
RB
1188 /* describe the stream */
1189 snprintf(cmd, sizeof(cmd),
1190 "DESCRIBE %s RTSP/1.0\r\n"
1191 "Accept: application/sdp\r\n",
1192 s->filename);
2e889ae4 1193 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1194 /**
1195 * The Require: attribute is needed for proper streaming from
1196 * Realmedia servers.
1197 */
1198 av_strlcat(cmd,
1199 "Require: com.real.retain-entity-for-setup\r\n",
1200 sizeof(cmd));
1201 }
53620bba
RB
1202 rtsp_send_cmd(s, cmd, reply, &content);
1203 if (!content) {
1204 err = AVERROR_INVALIDDATA;
1205 goto fail;
1206 }
1207 if (reply->status_code != RTSP_STATUS_OK) {
1208 err = AVERROR_INVALIDDATA;
1209 goto fail;
1210 }
1211
1212 /* now we got the SDP description, we parse it */
1213 ret = sdp_parse(s, (const char *)content);
1214 av_freep(&content);
1215 if (ret < 0) {
1216 err = AVERROR_INVALIDDATA;
1217 goto fail;
1218 }
1219
8a8754d8 1220 do {
90abbdba 1221 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1222
90abbdba 1223 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1224 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1225 real_challenge : NULL);
8a8754d8 1226 if (err < 0)
7e6ca34f 1227 goto fail;
90abbdba
RB
1228 lower_transport_mask &= ~(1 << lower_transport);
1229 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1230 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1231 goto fail;
1232 }
1233 } while (err);
53620bba 1234
ff762d6e
FB
1235 rt->state = RTSP_STATE_IDLE;
1236 rt->seek_timestamp = 0; /* default is to start stream at position
1237 zero */
c04c3282 1238 if (ap->initial_pause) {
ff762d6e
FB
1239 /* do not start immediately */
1240 } else {
1241 if (rtsp_read_play(s) < 0) {
1242 err = AVERROR_INVALIDDATA;
1617ad97
FB
1243 goto fail;
1244 }
1245 }
1617ad97
FB
1246 return 0;
1247 fail:
8b1ab7bf 1248 rtsp_close_streams(rt);
1617ad97
FB
1249 av_freep(&content);
1250 url_close(rt->rtsp_hd);
1251 return err;
1252}
1253
8b1ab7bf
FB
1254static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1255 uint8_t *buf, int buf_size)
1617ad97
FB
1256{
1257 RTSPState *rt = s->priv_data;
b6892136 1258 int id, len, i, ret;
1617ad97 1259 RTSPStream *rtsp_st;
1617ad97 1260
b6892136
FB
1261#ifdef DEBUG_RTP_TCP
1262 printf("tcp_read_packet:\n");
1263#endif
1617ad97
FB
1264 redo:
1265 for(;;) {
2a42b5c3 1266 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1267#ifdef DEBUG_RTP_TCP
1268 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1269#endif
1270 if (ret != 1)
8b1ab7bf 1271 return -1;
b6892136 1272 if (buf[0] == '$')
1617ad97
FB
1273 break;
1274 }
2a42b5c3 1275 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1276 if (ret != 3)
8b1ab7bf 1277 return -1;
b6892136 1278 id = buf[0];
80fb8234 1279 len = AV_RB16(buf + 1);
b6892136
FB
1280#ifdef DEBUG_RTP_TCP
1281 printf("id=%d len=%d\n", id, len);
1282#endif
8b1ab7bf 1283 if (len > buf_size || len < 12)
1617ad97
FB
1284 goto redo;
1285 /* get the data */
2a42b5c3 1286 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1287 if (ret != len)
8b1ab7bf 1288 return -1;
985b05d3 1289 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1290 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1291 return -1;
115329f1 1292
1617ad97 1293 /* find the matching stream */
8b1ab7bf
FB
1294 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1295 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1296 if (id >= rtsp_st->interleaved_min &&
1297 id <= rtsp_st->interleaved_max)
1617ad97
FB
1298 goto found;
1299 }
1300 goto redo;
1301 found:
8b1ab7bf
FB
1302 *prtsp_st = rtsp_st;
1303 return len;
1617ad97
FB
1304}
1305
115329f1 1306static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1307 uint8_t *buf, int buf_size)
1617ad97 1308{
8b1ab7bf 1309 RTSPState *rt = s->priv_data;
1617ad97
FB
1310 RTSPStream *rtsp_st;
1311 fd_set rfds;
1312 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1313 struct timeval tv;
1314
1315 for(;;) {
b7b8fc34 1316 if (url_interrupt_cb())
a960a1e0 1317 return AVERROR(EINTR);
1617ad97
FB
1318 FD_ZERO(&rfds);
1319 fd_max = -1;
8b1ab7bf
FB
1320 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1321 rtsp_st = rt->rtsp_streams[i];
1617ad97 1322 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1323 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1324 if (fd1 > fd_max)
1325 fd_max = fd1;
1326 FD_SET(fd1, &rfds);
1327 }
1617ad97 1328 tv.tv_sec = 0;
b7b8fc34 1329 tv.tv_usec = 100 * 1000;
1617ad97
FB
1330 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1331 if (n > 0) {
8b1ab7bf
FB
1332 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1333 rtsp_st = rt->rtsp_streams[i];
1334 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1335 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1336 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1337 if (ret > 0) {
1338 *prtsp_st = rtsp_st;
1617ad97
FB
1339 return ret;
1340 }
1341 }
1342 }
1343 }
1344 }
1345}
1346
1347static int rtsp_read_packet(AVFormatContext *s,
1348 AVPacket *pkt)
1349{
1350 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1351 RTSPStream *rtsp_st;
1352 int ret, len;
1353 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1354
2e889ae4 1355 if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1256d16b
RB
1356 int i;
1357 RTSPHeader reply1, *reply = &reply1;
1358 char cmd[1024];
1359
1360 snprintf(cmd, sizeof(cmd),
1361 "SET_PARAMETER %s RTSP/1.0\r\n"
1362 "Subscribe: ",
1363 s->filename);
1364 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1365 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
ab63fb03 1366 ff_rdt_subscribe_rule(cmd, sizeof(cmd), i, 0);
1256d16b
RB
1367 }
1368 av_strlcat(cmd, "\r\n", sizeof(cmd));
1369 rtsp_send_cmd(s, cmd, reply, NULL);
1370 if (reply->status_code != RTSP_STATUS_OK)
1371 return AVERROR_INVALIDDATA;
1372 rt->need_subscription = 0;
1373
1374 if (rt->state == RTSP_STATE_PLAYING)
1375 rtsp_read_play (s);
1376 }
1377
8b1ab7bf 1378 /* get next frames from the same RTP packet */
5465b0d4 1379 if (rt->cur_tx) {
119b4668 1380 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1381 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
4fce284c 1382 else
5465b0d4 1383 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
8b1ab7bf 1384 if (ret == 0) {
5465b0d4 1385 rt->cur_tx = NULL;
8b1ab7bf
FB
1386 return 0;
1387 } else if (ret == 1) {
1388 return 0;
1389 } else {
5465b0d4 1390 rt->cur_tx = NULL;
8b1ab7bf
FB
1391 }
1392 }
1617ad97 1393
8b1ab7bf
FB
1394 /* read next RTP packet */
1395 redo:
90abbdba 1396 switch(rt->lower_transport) {
1617ad97 1397 default:
90abbdba 1398 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1399 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1400 break;
90abbdba
RB
1401 case RTSP_LOWER_TRANSPORT_UDP:
1402 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1403 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
6ff1f615 1404 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
5465b0d4 1405 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1617ad97
FB
1406 break;
1407 }
8b1ab7bf 1408 if (len < 0)
489b0d4d 1409 return len;
119b4668 1410 if (rt->transport == RTSP_TRANSPORT_RDT)
5465b0d4 1411 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
4fce284c 1412 else
5465b0d4 1413 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
8b1ab7bf
FB
1414 if (ret < 0)
1415 goto redo;
1416 if (ret == 1) {
1417 /* more packets may follow, so we save the RTP context */
5465b0d4 1418 rt->cur_tx = rtsp_st->tx_ctx;
8b1ab7bf
FB
1419 }
1420 return 0;
1617ad97
FB
1421}
1422
ff762d6e 1423static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1424{
ff762d6e 1425 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1426 RTSPHeader reply1, *reply = &reply1;
1427 char cmd[1024];
1428
bc874dae 1429 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1430
2e889ae4 1431 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1432 if (rt->state == RTSP_STATE_PAUSED) {
1433 snprintf(cmd, sizeof(cmd),
1434 "PLAY %s RTSP/1.0\r\n",
1435 s->filename);
1436 } else {
1437 snprintf(cmd, sizeof(cmd),
1438 "PLAY %s RTSP/1.0\r\n"
1439 "Range: npt=%0.3f-\r\n",
1440 s->filename,
1441 (double)rt->seek_timestamp / AV_TIME_BASE);
1442 }
1443 rtsp_send_cmd(s, cmd, reply, NULL);
1444 if (reply->status_code != RTSP_STATUS_OK) {
1445 return -1;
1446 }
1256d16b 1447 }
5f86057f
RB
1448 rt->state = RTSP_STATE_PLAYING;
1449 return 0;
b7b8fc34
FB
1450}
1451
ff762d6e
FB
1452/* pause the stream */
1453static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1454{
ff762d6e 1455 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1456 RTSPHeader reply1, *reply = &reply1;
1457 char cmd[1024];
1458
b7b8fc34 1459 rt = s->priv_data;
115329f1 1460
ff762d6e
FB
1461 if (rt->state != RTSP_STATE_PLAYING)
1462 return 0;
2e889ae4 1463 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1464 snprintf(cmd, sizeof(cmd),
1465 "PAUSE %s RTSP/1.0\r\n",
1466 s->filename);
1467 rtsp_send_cmd(s, cmd, reply, NULL);
1468 if (reply->status_code != RTSP_STATUS_OK) {
1469 return -1;
1470 }
1256d16b 1471 }
5f86057f
RB
1472 rt->state = RTSP_STATE_PAUSED;
1473 return 0;
b7b8fc34
FB
1474}
1475
115329f1 1476static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1477 int64_t timestamp, int flags)
ff762d6e
FB
1478{
1479 RTSPState *rt = s->priv_data;
115329f1 1480
50755217 1481 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1482 switch(rt->state) {
1483 default:
1484 case RTSP_STATE_IDLE:
1485 break;
1486 case RTSP_STATE_PLAYING:
1487 if (rtsp_read_play(s) != 0)
1488 return -1;
1489 break;
1490 case RTSP_STATE_PAUSED:
1491 rt->state = RTSP_STATE_IDLE;
1492 break;
1493 }
1494 return 0;
1495}
1496
1617ad97
FB
1497static int rtsp_read_close(AVFormatContext *s)
1498{
1499 RTSPState *rt = s->priv_data;
1617ad97 1500 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1501 char cmd[1024];
1502
b6892136 1503#if 0
1617ad97 1504 /* NOTE: it is valid to flush the buffer here */
90abbdba 1505 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1506 url_fclose(&rt->rtsp_gb);
1507 }
b6892136 1508#endif
115329f1 1509 snprintf(cmd, sizeof(cmd),
b6892136 1510 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1511 s->filename);
1512 rtsp_send_cmd(s, cmd, reply, NULL);
1513
8b1ab7bf 1514 rtsp_close_streams(rt);
1617ad97
FB
1515 url_close(rt->rtsp_hd);
1516 return 0;
1517}
1518
96862926 1519#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1520AVInputFormat rtsp_demuxer = {
1617ad97 1521 "rtsp",
bde15e74 1522 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1523 sizeof(RTSPState),
1524 rtsp_probe,
1525 rtsp_read_header,
1526 rtsp_read_packet,
1527 rtsp_read_close,
ff762d6e 1528 rtsp_read_seek,
bb76a117 1529 .flags = AVFMT_NOFILE,
ff762d6e
FB
1530 .read_play = rtsp_read_play,
1531 .read_pause = rtsp_read_pause,
1617ad97 1532};
96862926 1533#endif
1617ad97 1534
cb1fdc61 1535static int sdp_probe(AVProbeData *p1)
93ced3e8 1536{
0e1ceacd 1537 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1538
1539 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1540 while (p < p_end && *p != '\0') {
f7d78f36 1541 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1542 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1543
1544 while(p < p_end - 1 && *p != '\n') p++;
1545 if (++p >= p_end)
cb1fdc61 1546 break;
cb1fdc61
FB
1547 if (*p == '\r')
1548 p++;
1549 }
93ced3e8
FB
1550 return 0;
1551}
1552
1553#define SDP_MAX_SIZE 8192
1554
1555static int sdp_read_header(AVFormatContext *s,
1556 AVFormatParameters *ap)
1557{
8b1ab7bf 1558 RTSPState *rt = s->priv_data;
93ced3e8
FB
1559 RTSPStream *rtsp_st;
1560 int size, i, err;
1561 char *content;
1562 char url[1024];
1563
1564 /* read the whole sdp file */
1565 /* XXX: better loading */
1566 content = av_malloc(SDP_MAX_SIZE);
899681cd 1567 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1568 if (size <= 0) {
1569 av_free(content);
1570 return AVERROR_INVALIDDATA;
1571 }
1572 content[size] ='\0';
1573
1574 sdp_parse(s, content);
1575 av_free(content);
1576
1577 /* open each RTP stream */
8b1ab7bf
FB
1578 for(i=0;i<rt->nb_rtsp_streams;i++) {
1579 rtsp_st = rt->rtsp_streams[i];
115329f1 1580
d2bf42be 1581 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1582 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1583 rtsp_st->sdp_port,
d2bf42be 1584 rtsp_st->sdp_port,
93ced3e8 1585 rtsp_st->sdp_ttl);
dbf30963 1586 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1587 err = AVERROR_INVALIDDATA;
1588 goto fail;
1589 }
ee0cb67f 1590 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1591 goto fail;
93ced3e8
FB
1592 }
1593 return 0;
1594 fail:
8b1ab7bf 1595 rtsp_close_streams(rt);
93ced3e8
FB
1596 return err;
1597}
1598
1599static int sdp_read_packet(AVFormatContext *s,
1600 AVPacket *pkt)
1601{
8b1ab7bf 1602 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1603}
1604
1605static int sdp_read_close(AVFormatContext *s)
1606{
8b1ab7bf
FB
1607 RTSPState *rt = s->priv_data;
1608 rtsp_close_streams(rt);
93ced3e8
FB
1609 return 0;
1610}
1611
ff70e601
MR
1612#ifdef CONFIG_SDP_DEMUXER
1613AVInputFormat sdp_demuxer = {
93ced3e8 1614 "sdp",
bde15e74 1615 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1616 sizeof(RTSPState),
1617 sdp_probe,
1618 sdp_read_header,
1619 sdp_read_packet,
1620 sdp_read_close,
1621};
ff70e601 1622#endif
93ced3e8 1623
e7047005 1624#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1625/* dummy redirector format (used directly in av_open_input_file now) */
1626static int redir_probe(AVProbeData *pd)
1627{
1628 const char *p;
1629 p = pd->buf;
1630 while (redir_isspace(*p))
1631 p++;
f7d78f36
MR
1632 if (av_strstart(p, "http://", NULL) ||
1633 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1634 return AVPROBE_SCORE_MAX;
1635 return 0;
1636}
1637
e8acf0ed 1638static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1639{
1640 char buf[4096], *q;
1641 int c;
1642 AVFormatContext *ic = NULL;
e8acf0ed 1643 ByteIOContext *f = s->pb;
1617ad97
FB
1644
1645 /* parse each URL and try to open it */
1646 c = url_fgetc(f);
1647 while (c != URL_EOF) {
1648 /* skip spaces */
1649 for(;;) {
1650 if (!redir_isspace(c))
1651 break;
1652 c = url_fgetc(f);
1653 }
1654 if (c == URL_EOF)
1655 break;
1656 /* record url */
1657 q = buf;
1658 for(;;) {
1659 if (c == URL_EOF || redir_isspace(c))
1660 break;
1661 if ((q - buf) < sizeof(buf) - 1)
1662 *q++ = c;
1663 c = url_fgetc(f);
1664 }
1665 *q = '\0';
1666 //printf("URL='%s'\n", buf);
1667 /* try to open the media file */
1668 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1669 break;
1670 }
1617ad97 1671 if (!ic)
6f3e0b21 1672 return AVERROR(EIO);
e8acf0ed
LA
1673
1674 *s = *ic;
1675 url_fclose(f);
1676
1677 return 0;
1617ad97
FB
1678}
1679
d2a067d1 1680AVInputFormat redir_demuxer = {
1617ad97 1681 "redir",
bde15e74 1682 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1683 0,
1684 redir_probe,
e8acf0ed 1685 redir_read_header,
1617ad97
FB
1686 NULL,
1687 NULL,
1688};
e7047005 1689#endif