Implement a RTSPTransport field, which allows proper separation of server
[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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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 ? */
8b1ab7bf 76 RTPDemuxContext *cur_rtp;
1256d16b 77 int need_subscription;
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78} RTSPState;
79
80typedef struct RTSPStream {
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81 URLContext *rtp_handle; /* RTP stream handle */
82 RTPDemuxContext *rtp_ctx; /* RTP 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 */
d1ccf0e0 92 rtp_payload_data_t 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)
95 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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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
286typedef struct attrname_map
287{
7b49ce2e 288 const char *str;
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289 uint16_t type;
290 uint32_t offset;
291} attrname_map_t;
292
293/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
294#define ATTR_NAME_TYPE_INT 0
295#define ATTR_NAME_TYPE_STR 1
296static attrname_map_t attr_names[]=
297{
298 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
299 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
300 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
301 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
302 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
303 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
304 {NULL, -1, -1},
305};
306
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307/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
308* because it is used in rtp_h264.c, which is forthcoming.
309*/
310int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
311{
312 skip_spaces(p);
313 if(**p)
314 {
315 get_word_sep(attr, attr_size, "=", p);
316 if (**p == '=')
317 (*p)++;
318 get_word_sep(value, value_size, ";", p);
319 if (**p == ';')
320 (*p)++;
321 return 1;
322 }
323 return 0;
324}
325
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326/* parse a SDP line and save stream attributes */
327static void sdp_parse_fmtp(AVStream *st, const char *p)
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328{
329 char attr[256];
330 char value[4096];
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331 int i;
332
333 RTSPStream *rtsp_st = st->priv_data;
01f4895c 334 AVCodecContext *codec = st->codec;
d1ccf0e0 335 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
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336
337 /* loop on each attribute */
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338 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
339 {
bb270c08 340 /* grab the codec extra_data from the config parameter of the fmtp line */
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341 sdp_parse_fmtp_config(codec, attr, value);
342 /* Looking for a known attribute */
343 for (i = 0; attr_names[i].str; ++i) {
344 if (!strcasecmp(attr, attr_names[i].str)) {
345 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
346 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
347 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
348 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 349 }
93ced3e8 350 }
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351 }
352}
353
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354/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
355 * and end time.
356 * Used for seeking in the rtp stream.
357 */
358static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
359{
360 char buf[256];
361
362 skip_spaces(&p);
f7d78f36 363 if (!av_stristart(p, "npt=", &p))
31693e00
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364 return;
365
366 *start = AV_NOPTS_VALUE;
367 *end = AV_NOPTS_VALUE;
368
369 get_word_sep(buf, sizeof(buf), "-", &p);
370 *start = parse_date(buf, 1);
371 if (*p == '-') {
372 p++;
373 get_word_sep(buf, sizeof(buf), "-", &p);
374 *end = parse_date(buf, 1);
375 }
376// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
377// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
378}
379
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380typedef struct SDPParseState {
381 /* SDP only */
382 struct in_addr default_ip;
383 int default_ttl;
384} SDPParseState;
385
386static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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387 int letter, const char *buf)
388{
8b1ab7bf 389 RTSPState *rt = s->priv_data;
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390 char buf1[64], st_type[64];
391 const char *p;
93ced3e8 392 int codec_type, 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) {
93ced3e8
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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);
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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
RM
519 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
520 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
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) {
537 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
538 }
539 }
540 }
f7d78f36 541 } else if(av_strstart(p, "range:", &p)) {
31693e00
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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
RB
551 } else if (s->nb_streams > 0) {
552 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
553 if (rtsp_st->dynamic_handler &&
554 rtsp_st->dynamic_handler->parse_sdp_a_line)
555 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
556 rtsp_st->dynamic_protocol_context, buf);
1617ad97
FB
557 }
558 break;
559 }
560}
561
5c91a675 562static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
563{
564 const char *p;
565 int letter;
d6bb9ebd 566 char buf[2048], *q;
93ced3e8 567 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 568
93ced3e8 569 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
570 p = content;
571 for(;;) {
572 skip_spaces(&p);
573 letter = *p;
574 if (letter == '\0')
575 break;
576 p++;
577 if (*p != '=')
578 goto next_line;
579 p++;
580 /* get the content */
581 q = buf;
b6892136 582 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
583 if ((q - buf) < sizeof(buf) - 1)
584 *q++ = *p;
585 p++;
586 }
587 *q = '\0';
93ced3e8 588 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
589 next_line:
590 while (*p != '\n' && *p != '\0')
591 p++;
592 if (*p == '\n')
593 p++;
594 }
595 return 0;
596}
597
598static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
599{
600 const char *p;
601 int v;
602
603 p = *pp;
604 skip_spaces(&p);
605 v = strtol(p, (char **)&p, 10);
606 if (*p == '-') {
607 p++;
608 *min_ptr = v;
609 v = strtol(p, (char **)&p, 10);
610 *max_ptr = v;
611 } else {
612 *min_ptr = v;
613 *max_ptr = v;
614 }
615 *pp = p;
616}
617
618/* XXX: only one transport specification is parsed */
619static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
620{
621 char transport_protocol[16];
622 char profile[16];
623 char lower_transport[16];
624 char parameter[16];
625 RTSPTransportField *th;
626 char buf[256];
115329f1 627
1617ad97 628 reply->nb_transports = 0;
115329f1 629
1617ad97
FB
630 for(;;) {
631 skip_spaces(&p);
632 if (*p == '\0')
633 break;
634
635 th = &reply->transports[reply->nb_transports];
636
115329f1 637 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
638 "/", &p);
639 if (*p == '/')
640 p++;
e1502118 641 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
642 get_word_sep(profile, sizeof(profile), "/;,", &p);
643 lower_transport[0] = '\0';
644 /* rtp/avp/<protocol> */
645 if (*p == '/') {
646 p++;
647 get_word_sep(lower_transport, sizeof(lower_transport),
648 ";,", &p);
119b4668
RB
649 }
650 th->transport = RTSP_TRANSPORT_RTP;
651 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
652 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 653 /* x-pn-tng/<protocol> */
e1502118
LB
654 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
655 profile[0] = '\0';
119b4668 656 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 657 }
b6892136 658 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 659 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 660 else
90abbdba 661 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 662
1617ad97
FB
663 if (*p == ';')
664 p++;
665 /* get each parameter */
666 while (*p != '\0' && *p != ',') {
667 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
668 if (!strcmp(parameter, "port")) {
669 if (*p == '=') {
670 p++;
671 rtsp_parse_range(&th->port_min, &th->port_max, &p);
672 }
673 } else if (!strcmp(parameter, "client_port")) {
674 if (*p == '=') {
675 p++;
115329f1 676 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
677 &th->client_port_max, &p);
678 }
679 } else if (!strcmp(parameter, "server_port")) {
680 if (*p == '=') {
681 p++;
115329f1 682 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
683 &th->server_port_max, &p);
684 }
685 } else if (!strcmp(parameter, "interleaved")) {
686 if (*p == '=') {
687 p++;
115329f1 688 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
689 &th->interleaved_max, &p);
690 }
691 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
692 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
693 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
694 } else if (!strcmp(parameter, "ttl")) {
695 if (*p == '=') {
696 p++;
697 th->ttl = strtol(p, (char **)&p, 10);
698 }
699 } else if (!strcmp(parameter, "destination")) {
700 struct in_addr ipaddr;
701
702 if (*p == '=') {
703 p++;
704 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 705 if (inet_aton(buf, &ipaddr))
1617ad97
FB
706 th->destination = ntohl(ipaddr.s_addr);
707 }
708 }
709 while (*p != ';' && *p != '\0' && *p != ',')
710 p++;
711 if (*p == ';')
712 p++;
713 }
714 if (*p == ',')
715 p++;
716
717 reply->nb_transports++;
718 }
719}
720
721void rtsp_parse_line(RTSPHeader *reply, const char *buf)
722{
723 const char *p;
724
725 /* NOTE: we do case independent match for broken servers */
726 p = buf;
f7d78f36 727 if (av_stristart(p, "Session:", &p)) {
1617ad97 728 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 729 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 730 reply->content_length = strtol(p, NULL, 10);
f7d78f36 731 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 732 rtsp_parse_transport(reply, p);
f7d78f36 733 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 734 reply->seq = strtol(p, NULL, 10);
f7d78f36 735 } else if (av_stristart(p, "Range:", &p)) {
31693e00 736 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
737 } else if (av_stristart(p, "RealChallenge1:", &p)) {
738 skip_spaces(&p);
739 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1617ad97
FB
740 }
741}
742
2a42b5c3
LS
743static int url_readbuf(URLContext *h, unsigned char *buf, int size)
744{
745 int ret, len;
746
747 len = 0;
748 while (len < size) {
749 ret = url_read(h, buf+len, size-len);
750 if (ret < 1)
751 return ret;
752 len += ret;
753 }
754 return len;
755}
756
b7b8fc34
FB
757/* skip a RTP/TCP interleaved packet */
758static void rtsp_skip_packet(AVFormatContext *s)
759{
760 RTSPState *rt = s->priv_data;
761 int ret, len, len1;
762 uint8_t buf[1024];
763
2a42b5c3 764 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
765 if (ret != 3)
766 return;
80fb8234 767 len = AV_RB16(buf + 1);
b7b8fc34
FB
768#ifdef DEBUG
769 printf("skipping RTP packet len=%d\n", len);
770#endif
771 /* skip payload */
772 while (len > 0) {
773 len1 = len;
774 if (len1 > sizeof(buf))
775 len1 = sizeof(buf);
2a42b5c3 776 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
777 if (ret != len1)
778 return;
779 len -= len1;
780 }
781}
1617ad97 782
115329f1
DB
783static void rtsp_send_cmd(AVFormatContext *s,
784 const char *cmd, RTSPHeader *reply,
1617ad97
FB
785 unsigned char **content_ptr)
786{
787 RTSPState *rt = s->priv_data;
788 char buf[4096], buf1[1024], *q;
789 unsigned char ch;
790 const char *p;
791 int content_length, line_count;
792 unsigned char *content = NULL;
793
794 memset(reply, 0, sizeof(RTSPHeader));
795
796 rt->seq++;
75e61b0e 797 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 798 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 799 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 800 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 801 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 802 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 803 }
75e61b0e 804 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
805#ifdef DEBUG
806 printf("Sending:\n%s--\n", buf);
807#endif
808 url_write(rt->rtsp_hd, buf, strlen(buf));
809
810 /* parse reply (XXX: use buffers) */
811 line_count = 0;
812 rt->last_reply[0] = '\0';
813 for(;;) {
814 q = buf;
815 for(;;) {
2a42b5c3 816 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
817 break;
818 if (ch == '\n')
819 break;
b7b8fc34
FB
820 if (ch == '$') {
821 /* XXX: only parse it if first char on line ? */
822 rtsp_skip_packet(s);
823 } else if (ch != '\r') {
1617ad97
FB
824 if ((q - buf) < sizeof(buf) - 1)
825 *q++ = ch;
826 }
827 }
828 *q = '\0';
829#ifdef DEBUG
830 printf("line='%s'\n", buf);
831#endif
832 /* test if last line */
833 if (buf[0] == '\0')
834 break;
835 p = buf;
836 if (line_count == 0) {
837 /* get reply code */
838 get_word(buf1, sizeof(buf1), &p);
839 get_word(buf1, sizeof(buf1), &p);
840 reply->status_code = atoi(buf1);
841 } else {
842 rtsp_parse_line(reply, p);
75e61b0e
MR
843 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
844 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
845 }
846 line_count++;
847 }
115329f1 848
1617ad97 849 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 850 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 851
1617ad97
FB
852 content_length = reply->content_length;
853 if (content_length > 0) {
854 /* leave some room for a trailing '\0' (useful for simple parsing) */
855 content = av_malloc(content_length + 1);
2a42b5c3 856 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
857 content[content_length] = '\0';
858 }
859 if (content_ptr)
860 *content_ptr = content;
e2e2e7dd
AB
861 else
862 av_free(content);
1617ad97
FB
863}
864
1617ad97 865
8b1ab7bf
FB
866/* close and free RTSP streams */
867static void rtsp_close_streams(RTSPState *rt)
868{
869 int i;
870 RTSPStream *rtsp_st;
871
872 for(i=0;i<rt->nb_rtsp_streams;i++) {
873 rtsp_st = rt->rtsp_streams[i];
874 if (rtsp_st) {
875 if (rtsp_st->rtp_ctx)
876 rtp_parse_close(rtsp_st->rtp_ctx);
877 if (rtsp_st->rtp_handle)
878 url_close(rtsp_st->rtp_handle);
4934884a
RM
879 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
880 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 881 }
8b1ab7bf
FB
882 }
883 av_free(rt->rtsp_streams);
884}
885
ee0cb67f
RB
886static int
887rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
888{
889 AVStream *st = NULL;
890
a6789dca
RB
891 /* open the RTP context */
892 if (rtsp_st->stream_index >= 0)
893 st = s->streams[rtsp_st->stream_index];
894 if (!st)
895 s->ctx_flags |= AVFMTCTX_NOHEADER;
896 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
897
898 if (!rtsp_st->rtp_ctx) {
899 return AVERROR(ENOMEM);
900 } else {
901 if(rtsp_st->dynamic_handler) {
902 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
903 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
ee0cb67f 904 }
a6789dca 905 }
ee0cb67f
RB
906
907 return 0;
908}
909
53620bba
RB
910/**
911 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
912 */
913static int
e9dea59f 914make_setup_request (AVFormatContext *s, const char *host, int port,
90abbdba 915 int lower_transport, const char *real_challenge)
1617ad97
FB
916{
917 RTSPState *rt = s->priv_data;
53620bba 918 int j, i, err;
1617ad97 919 RTSPStream *rtsp_st;
53620bba
RB
920 RTSPHeader reply1, *reply = &reply1;
921 char cmd[2048];
e9dea59f
RB
922 const char *trans_pref;
923
119b4668 924 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
925 trans_pref = "x-pn-tng";
926 else
927 trans_pref = "RTP/AVP";
115329f1 928
1617ad97
FB
929 /* for each stream, make the setup request */
930 /* XXX: we assume the same server is used for the control of each
931 RTSP stream */
d1ccf0e0
RD
932
933 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
934 char transport[2048];
935
8b1ab7bf 936 rtsp_st = rt->rtsp_streams[i];
1617ad97 937
1617ad97 938 /* RTP/UDP */
90abbdba 939 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 940 char buf[256];
85fb7b34
FB
941
942 /* first try in specified port range */
d1ccf0e0
RD
943 if (RTSP_RTP_PORT_MIN != 0) {
944 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 945 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 946 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 947 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 948 goto rtp_opened;
d1ccf0e0 949 }
85fb7b34 950 }
1617ad97 951 }
85fb7b34 952
d1ccf0e0
RD
953/* then try on any port
954** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
955** err = AVERROR_INVALIDDATA;
956** goto fail;
957** }
958*/
85fb7b34
FB
959
960 rtp_opened:
8b1ab7bf 961 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 962 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
963 "%s/UDP;", trans_pref);
964 if (rt->server_type != RTSP_SERVER_REAL)
965 av_strlcat(transport, "unicast;", sizeof(transport));
966 av_strlcatf(transport, sizeof(transport),
967 "client_port=%d", port);
119b4668 968 if (rt->transport == RTSP_TRANSPORT_RTP)
e9dea59f 969 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
970 }
971
972 /* RTP/TCP */
90abbdba 973 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
0ad306bc 974 snprintf(transport, sizeof(transport) - 1,
e9dea59f 975 "%s/TCP", trans_pref);
1617ad97
FB
976 }
977
90abbdba 978 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 979 snprintf(transport, sizeof(transport) - 1,
e9dea59f 980 "%s/UDP;multicast", trans_pref);
1617ad97 981 }
2e889ae4 982 if (rt->server_type == RTSP_SERVER_REAL)
e9dea59f 983 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 984 snprintf(cmd, sizeof(cmd),
b6892136
FB
985 "SETUP %s RTSP/1.0\r\n"
986 "Transport: %s\r\n",
1617ad97 987 rtsp_st->control_url, transport);
2e889ae4 988 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
989 char real_res[41], real_csum[9];
990 ff_rdt_calc_response_and_checksum(real_res, real_csum,
991 real_challenge);
992 av_strlcatf(cmd, sizeof(cmd),
993 "If-Match: %s\r\n"
994 "RealChallenge2: %s, sd=%s\r\n",
995 rt->session_id, real_res, real_csum);
996 }
1617ad97 997 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
998 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
999 err = 1;
1000 goto fail;
7e6ca34f
RB
1001 } else if (reply->status_code != RTSP_STATUS_OK ||
1002 reply->nb_transports != 1) {
1617ad97
FB
1003 err = AVERROR_INVALIDDATA;
1004 goto fail;
1005 }
1006
1007 /* XXX: same protocol for all streams is required */
1008 if (i > 0) {
119b4668
RB
1009 if (reply->transports[0].lower_transport != rt->lower_transport ||
1010 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1011 err = AVERROR_INVALIDDATA;
1012 goto fail;
1013 }
1014 } else {
90abbdba 1015 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1016 rt->transport = reply->transports[0].transport;
1617ad97
FB
1017 }
1018
1019 /* close RTP connection if not choosen */
90abbdba
RB
1020 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1021 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1022 url_close(rtsp_st->rtp_handle);
1023 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1024 }
1025
90abbdba
RB
1026 switch(reply->transports[0].lower_transport) {
1027 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1028 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1029 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1030 break;
115329f1 1031
90abbdba 1032 case RTSP_LOWER_TRANSPORT_UDP:
1617ad97
FB
1033 {
1034 char url[1024];
115329f1 1035
1617ad97 1036 /* XXX: also use address if specified */
115329f1 1037 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1038 host, reply->transports[0].server_port_min);
8b1ab7bf 1039 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1040 err = AVERROR_INVALIDDATA;
1041 goto fail;
1042 }
1043 }
1044 break;
90abbdba 1045 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1617ad97
FB
1046 {
1047 char url[1024];
d02678ec 1048 struct in_addr in;
1617ad97 1049
d02678ec 1050 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1051 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1052 inet_ntoa(in),
1053 reply->transports[0].port_min,
1054 reply->transports[0].ttl);
dbf30963 1055 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1056 err = AVERROR_INVALIDDATA;
1057 goto fail;
1058 }
1059 }
1060 break;
1061 }
d1ccf0e0 1062
ee0cb67f 1063 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1064 goto fail;
1617ad97
FB
1065 }
1066
2e889ae4 1067 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1068 rt->need_subscription = 1;
1069
53620bba
RB
1070 return 0;
1071
1072fail:
8a8754d8
RB
1073 for (i=0; i<rt->nb_rtsp_streams; i++) {
1074 if (rt->rtsp_streams[i]->rtp_handle) {
1075 url_close(rt->rtsp_streams[i]->rtp_handle);
1076 rt->rtsp_streams[i]->rtp_handle = NULL;
1077 }
1078 }
53620bba
RB
1079 return err;
1080}
1081
1082static int rtsp_read_header(AVFormatContext *s,
1083 AVFormatParameters *ap)
1084{
1085 RTSPState *rt = s->priv_data;
1086 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1087 URLContext *rtsp_hd;
1088 int port, ret, err;
1089 RTSPHeader reply1, *reply = &reply1;
1090 unsigned char *content = NULL;
90abbdba 1091 int lower_transport_mask = 0;
1cf151e9 1092 char real_challenge[64];
53620bba
RB
1093
1094 /* extract hostname and port */
1095 url_split(NULL, 0, NULL, 0,
1096 host, sizeof(host), &port, path, sizeof(path), s->filename);
1097 if (port < 0)
1098 port = RTSP_DEFAULT_PORT;
1099
1100 /* search for options */
1101 option_list = strchr(path, '?');
1102 if (option_list) {
1103 /* remove the options from the path */
1104 *option_list++ = 0;
1105 while(option_list) {
1106 /* move the option pointer */
1107 option = option_list;
1108 option_list = strchr(option_list, '&');
1109 if (option_list)
1110 *(option_list++) = 0;
1111 /* handle the options */
1112 if (strcmp(option, "udp") == 0)
90abbdba 1113 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
53620bba 1114 else if (strcmp(option, "multicast") == 0)
90abbdba 1115 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
53620bba 1116 else if (strcmp(option, "tcp") == 0)
90abbdba 1117 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
53620bba
RB
1118 }
1119 }
1120
90abbdba
RB
1121 if (!lower_transport_mask)
1122 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
53620bba
RB
1123
1124 /* open the tcp connexion */
1125 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1126 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1127 return AVERROR(EIO);
1128 rt->rtsp_hd = rtsp_hd;
1129 rt->seq = 0;
1130
1cf151e9
RB
1131 /* request options supported by the server; this also detects server type */
1132 for (rt->server_type = RTSP_SERVER_RTP;;) {
1133 snprintf(cmd, sizeof(cmd),
1134 "OPTIONS %s RTSP/1.0\r\n", s->filename);
2e889ae4 1135 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1136 av_strlcat(cmd,
1137 /**
1138 * The following entries are required for proper
1139 * streaming from a Realmedia server. They are
1140 * interdependent in some way although we currently
1141 * don't quite understand how. Values were copied
1142 * from mplayer SVN r23589.
1143 * @param CompanyID is a 16-byte ID in base64
1144 * @param ClientChallenge is a 16-byte ID in hex
1145 */
1146 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1147 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1148 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1149 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1150 sizeof(cmd));
1151 rtsp_send_cmd(s, cmd, reply, NULL);
1152 if (reply->status_code != RTSP_STATUS_OK) {
1153 err = AVERROR_INVALIDDATA;
1154 goto fail;
1155 }
1156
1157 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1158 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1159 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1160 continue;
2e889ae4 1161 } else if (rt->server_type == RTSP_SERVER_REAL) {
1cf151e9
RB
1162 strcpy(real_challenge, reply->real_challenge);
1163 }
1164 break;
1165 }
1166
53620bba
RB
1167 /* describe the stream */
1168 snprintf(cmd, sizeof(cmd),
1169 "DESCRIBE %s RTSP/1.0\r\n"
1170 "Accept: application/sdp\r\n",
1171 s->filename);
2e889ae4 1172 if (rt->server_type == RTSP_SERVER_REAL) {
897ade1b
RB
1173 /**
1174 * The Require: attribute is needed for proper streaming from
1175 * Realmedia servers.
1176 */
1177 av_strlcat(cmd,
1178 "Require: com.real.retain-entity-for-setup\r\n",
1179 sizeof(cmd));
1180 }
53620bba
RB
1181 rtsp_send_cmd(s, cmd, reply, &content);
1182 if (!content) {
1183 err = AVERROR_INVALIDDATA;
1184 goto fail;
1185 }
1186 if (reply->status_code != RTSP_STATUS_OK) {
1187 err = AVERROR_INVALIDDATA;
1188 goto fail;
1189 }
1190
1191 /* now we got the SDP description, we parse it */
1192 ret = sdp_parse(s, (const char *)content);
1193 av_freep(&content);
1194 if (ret < 0) {
1195 err = AVERROR_INVALIDDATA;
1196 goto fail;
1197 }
1198
8a8754d8 1199 do {
90abbdba 1200 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
8a8754d8 1201
90abbdba 1202 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1203 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1204 real_challenge : NULL);
8a8754d8 1205 if (err < 0)
7e6ca34f 1206 goto fail;
90abbdba
RB
1207 lower_transport_mask &= ~(1 << lower_transport);
1208 if (lower_transport_mask == 0 && err == 1) {
5ee0e139 1209 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1210 goto fail;
1211 }
1212 } while (err);
53620bba 1213
ff762d6e
FB
1214 rt->state = RTSP_STATE_IDLE;
1215 rt->seek_timestamp = 0; /* default is to start stream at position
1216 zero */
c04c3282 1217 if (ap->initial_pause) {
ff762d6e
FB
1218 /* do not start immediately */
1219 } else {
1220 if (rtsp_read_play(s) < 0) {
1221 err = AVERROR_INVALIDDATA;
1617ad97
FB
1222 goto fail;
1223 }
1224 }
1617ad97
FB
1225 return 0;
1226 fail:
8b1ab7bf 1227 rtsp_close_streams(rt);
1617ad97
FB
1228 av_freep(&content);
1229 url_close(rt->rtsp_hd);
1230 return err;
1231}
1232
8b1ab7bf
FB
1233static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1234 uint8_t *buf, int buf_size)
1617ad97
FB
1235{
1236 RTSPState *rt = s->priv_data;
b6892136 1237 int id, len, i, ret;
1617ad97 1238 RTSPStream *rtsp_st;
1617ad97 1239
b6892136
FB
1240#ifdef DEBUG_RTP_TCP
1241 printf("tcp_read_packet:\n");
1242#endif
1617ad97
FB
1243 redo:
1244 for(;;) {
2a42b5c3 1245 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1246#ifdef DEBUG_RTP_TCP
1247 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1248#endif
1249 if (ret != 1)
8b1ab7bf 1250 return -1;
b6892136 1251 if (buf[0] == '$')
1617ad97
FB
1252 break;
1253 }
2a42b5c3 1254 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1255 if (ret != 3)
8b1ab7bf 1256 return -1;
b6892136 1257 id = buf[0];
80fb8234 1258 len = AV_RB16(buf + 1);
b6892136
FB
1259#ifdef DEBUG_RTP_TCP
1260 printf("id=%d len=%d\n", id, len);
1261#endif
8b1ab7bf 1262 if (len > buf_size || len < 12)
1617ad97
FB
1263 goto redo;
1264 /* get the data */
2a42b5c3 1265 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1266 if (ret != len)
8b1ab7bf 1267 return -1;
115329f1 1268
1617ad97 1269 /* find the matching stream */
8b1ab7bf
FB
1270 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1271 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1272 if (id >= rtsp_st->interleaved_min &&
1273 id <= rtsp_st->interleaved_max)
1617ad97
FB
1274 goto found;
1275 }
1276 goto redo;
1277 found:
8b1ab7bf
FB
1278 *prtsp_st = rtsp_st;
1279 return len;
1617ad97
FB
1280}
1281
115329f1 1282static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1283 uint8_t *buf, int buf_size)
1617ad97 1284{
8b1ab7bf 1285 RTSPState *rt = s->priv_data;
1617ad97
FB
1286 RTSPStream *rtsp_st;
1287 fd_set rfds;
1288 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1289 struct timeval tv;
1290
1291 for(;;) {
b7b8fc34 1292 if (url_interrupt_cb())
a960a1e0 1293 return AVERROR(EINTR);
1617ad97
FB
1294 FD_ZERO(&rfds);
1295 fd_max = -1;
8b1ab7bf
FB
1296 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1297 rtsp_st = rt->rtsp_streams[i];
1617ad97 1298 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1299 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1300 if (fd1 > fd_max)
1301 fd_max = fd1;
1302 FD_SET(fd1, &rfds);
1303 }
1617ad97 1304 tv.tv_sec = 0;
b7b8fc34 1305 tv.tv_usec = 100 * 1000;
1617ad97
FB
1306 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1307 if (n > 0) {
8b1ab7bf
FB
1308 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1309 rtsp_st = rt->rtsp_streams[i];
1310 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1311 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1312 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1313 if (ret > 0) {
1314 *prtsp_st = rtsp_st;
1617ad97
FB
1315 return ret;
1316 }
1317 }
1318 }
1319 }
1320 }
1321}
1322
1323static int rtsp_read_packet(AVFormatContext *s,
1324 AVPacket *pkt)
1325{
1326 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1327 RTSPStream *rtsp_st;
1328 int ret, len;
1329 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1330
2e889ae4 1331 if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1256d16b
RB
1332 int i;
1333 RTSPHeader reply1, *reply = &reply1;
1334 char cmd[1024];
1335
1336 snprintf(cmd, sizeof(cmd),
1337 "SET_PARAMETER %s RTSP/1.0\r\n"
1338 "Subscribe: ",
1339 s->filename);
1340 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1341 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
ab63fb03 1342 ff_rdt_subscribe_rule(cmd, sizeof(cmd), i, 0);
119b4668 1343 if (rt->transport == RTSP_TRANSPORT_RDT)
ab63fb03 1344 ff_rdt_subscribe_rule2(
1256d16b
RB
1345 rt->rtsp_streams[i]->rtp_ctx,
1346 cmd, sizeof(cmd), i, 0);
1347 }
1348 av_strlcat(cmd, "\r\n", sizeof(cmd));
1349 rtsp_send_cmd(s, cmd, reply, NULL);
1350 if (reply->status_code != RTSP_STATUS_OK)
1351 return AVERROR_INVALIDDATA;
1352 rt->need_subscription = 0;
1353
1354 if (rt->state == RTSP_STATE_PLAYING)
1355 rtsp_read_play (s);
1356 }
1357
8b1ab7bf
FB
1358 /* get next frames from the same RTP packet */
1359 if (rt->cur_rtp) {
119b4668 1360 if (rt->transport == RTSP_TRANSPORT_RDT)
4fce284c
RB
1361 ret = ff_rdt_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1362 else
1363 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
8b1ab7bf
FB
1364 if (ret == 0) {
1365 rt->cur_rtp = NULL;
1366 return 0;
1367 } else if (ret == 1) {
1368 return 0;
1369 } else {
1370 rt->cur_rtp = NULL;
1371 }
1372 }
1617ad97 1373
8b1ab7bf
FB
1374 /* read next RTP packet */
1375 redo:
90abbdba 1376 switch(rt->lower_transport) {
1617ad97 1377 default:
90abbdba 1378 case RTSP_LOWER_TRANSPORT_TCP:
8b1ab7bf 1379 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97 1380 break;
90abbdba
RB
1381 case RTSP_LOWER_TRANSPORT_UDP:
1382 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
8b1ab7bf 1383 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
74ef8b43 1384 if (len >=0 && rtsp_st->rtp_ctx)
dbf30963 1385 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1386 break;
1387 }
8b1ab7bf 1388 if (len < 0)
489b0d4d 1389 return len;
119b4668 1390 if (rt->transport == RTSP_TRANSPORT_RDT)
4fce284c
RB
1391 ret = ff_rdt_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1392 else
1393 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
8b1ab7bf
FB
1394 if (ret < 0)
1395 goto redo;
1396 if (ret == 1) {
1397 /* more packets may follow, so we save the RTP context */
1398 rt->cur_rtp = rtsp_st->rtp_ctx;
1399 }
1400 return 0;
1617ad97
FB
1401}
1402
ff762d6e 1403static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1404{
ff762d6e 1405 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1406 RTSPHeader reply1, *reply = &reply1;
1407 char cmd[1024];
1408
bc874dae 1409 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1410
2e889ae4 1411 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1412 if (rt->state == RTSP_STATE_PAUSED) {
1413 snprintf(cmd, sizeof(cmd),
1414 "PLAY %s RTSP/1.0\r\n",
1415 s->filename);
1416 } else {
1417 snprintf(cmd, sizeof(cmd),
1418 "PLAY %s RTSP/1.0\r\n"
1419 "Range: npt=%0.3f-\r\n",
1420 s->filename,
1421 (double)rt->seek_timestamp / AV_TIME_BASE);
1422 }
1423 rtsp_send_cmd(s, cmd, reply, NULL);
1424 if (reply->status_code != RTSP_STATUS_OK) {
1425 return -1;
1426 }
1256d16b 1427 }
5f86057f
RB
1428 rt->state = RTSP_STATE_PLAYING;
1429 return 0;
b7b8fc34
FB
1430}
1431
ff762d6e
FB
1432/* pause the stream */
1433static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1434{
ff762d6e 1435 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1436 RTSPHeader reply1, *reply = &reply1;
1437 char cmd[1024];
1438
b7b8fc34 1439 rt = s->priv_data;
115329f1 1440
ff762d6e
FB
1441 if (rt->state != RTSP_STATE_PLAYING)
1442 return 0;
2e889ae4 1443 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
99b2ac07
RB
1444 snprintf(cmd, sizeof(cmd),
1445 "PAUSE %s RTSP/1.0\r\n",
1446 s->filename);
1447 rtsp_send_cmd(s, cmd, reply, NULL);
1448 if (reply->status_code != RTSP_STATUS_OK) {
1449 return -1;
1450 }
1256d16b 1451 }
5f86057f
RB
1452 rt->state = RTSP_STATE_PAUSED;
1453 return 0;
b7b8fc34
FB
1454}
1455
115329f1 1456static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1457 int64_t timestamp, int flags)
ff762d6e
FB
1458{
1459 RTSPState *rt = s->priv_data;
115329f1 1460
50755217 1461 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1462 switch(rt->state) {
1463 default:
1464 case RTSP_STATE_IDLE:
1465 break;
1466 case RTSP_STATE_PLAYING:
1467 if (rtsp_read_play(s) != 0)
1468 return -1;
1469 break;
1470 case RTSP_STATE_PAUSED:
1471 rt->state = RTSP_STATE_IDLE;
1472 break;
1473 }
1474 return 0;
1475}
1476
1617ad97
FB
1477static int rtsp_read_close(AVFormatContext *s)
1478{
1479 RTSPState *rt = s->priv_data;
1617ad97 1480 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1481 char cmd[1024];
1482
b6892136 1483#if 0
1617ad97 1484 /* NOTE: it is valid to flush the buffer here */
90abbdba 1485 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1486 url_fclose(&rt->rtsp_gb);
1487 }
b6892136 1488#endif
115329f1 1489 snprintf(cmd, sizeof(cmd),
b6892136 1490 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1491 s->filename);
1492 rtsp_send_cmd(s, cmd, reply, NULL);
1493
8b1ab7bf 1494 rtsp_close_streams(rt);
1617ad97
FB
1495 url_close(rt->rtsp_hd);
1496 return 0;
1497}
1498
96862926 1499#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1500AVInputFormat rtsp_demuxer = {
1617ad97 1501 "rtsp",
bde15e74 1502 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1503 sizeof(RTSPState),
1504 rtsp_probe,
1505 rtsp_read_header,
1506 rtsp_read_packet,
1507 rtsp_read_close,
ff762d6e 1508 rtsp_read_seek,
bb76a117 1509 .flags = AVFMT_NOFILE,
ff762d6e
FB
1510 .read_play = rtsp_read_play,
1511 .read_pause = rtsp_read_pause,
1617ad97 1512};
96862926 1513#endif
1617ad97 1514
cb1fdc61 1515static int sdp_probe(AVProbeData *p1)
93ced3e8 1516{
0e1ceacd 1517 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1518
1519 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1520 while (p < p_end && *p != '\0') {
f7d78f36 1521 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1522 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1523
1524 while(p < p_end - 1 && *p != '\n') p++;
1525 if (++p >= p_end)
cb1fdc61 1526 break;
cb1fdc61
FB
1527 if (*p == '\r')
1528 p++;
1529 }
93ced3e8
FB
1530 return 0;
1531}
1532
1533#define SDP_MAX_SIZE 8192
1534
1535static int sdp_read_header(AVFormatContext *s,
1536 AVFormatParameters *ap)
1537{
8b1ab7bf 1538 RTSPState *rt = s->priv_data;
93ced3e8
FB
1539 RTSPStream *rtsp_st;
1540 int size, i, err;
1541 char *content;
1542 char url[1024];
1543
1544 /* read the whole sdp file */
1545 /* XXX: better loading */
1546 content = av_malloc(SDP_MAX_SIZE);
899681cd 1547 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1548 if (size <= 0) {
1549 av_free(content);
1550 return AVERROR_INVALIDDATA;
1551 }
1552 content[size] ='\0';
1553
1554 sdp_parse(s, content);
1555 av_free(content);
1556
1557 /* open each RTP stream */
8b1ab7bf
FB
1558 for(i=0;i<rt->nb_rtsp_streams;i++) {
1559 rtsp_st = rt->rtsp_streams[i];
115329f1 1560
d2bf42be 1561 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1562 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1563 rtsp_st->sdp_port,
d2bf42be 1564 rtsp_st->sdp_port,
93ced3e8 1565 rtsp_st->sdp_ttl);
dbf30963 1566 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1567 err = AVERROR_INVALIDDATA;
1568 goto fail;
1569 }
ee0cb67f 1570 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1571 goto fail;
93ced3e8
FB
1572 }
1573 return 0;
1574 fail:
8b1ab7bf 1575 rtsp_close_streams(rt);
93ced3e8
FB
1576 return err;
1577}
1578
1579static int sdp_read_packet(AVFormatContext *s,
1580 AVPacket *pkt)
1581{
8b1ab7bf 1582 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1583}
1584
1585static int sdp_read_close(AVFormatContext *s)
1586{
8b1ab7bf
FB
1587 RTSPState *rt = s->priv_data;
1588 rtsp_close_streams(rt);
93ced3e8
FB
1589 return 0;
1590}
1591
ff70e601
MR
1592#ifdef CONFIG_SDP_DEMUXER
1593AVInputFormat sdp_demuxer = {
93ced3e8 1594 "sdp",
bde15e74 1595 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1596 sizeof(RTSPState),
1597 sdp_probe,
1598 sdp_read_header,
1599 sdp_read_packet,
1600 sdp_read_close,
1601};
ff70e601 1602#endif
93ced3e8 1603
e7047005 1604#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1605/* dummy redirector format (used directly in av_open_input_file now) */
1606static int redir_probe(AVProbeData *pd)
1607{
1608 const char *p;
1609 p = pd->buf;
1610 while (redir_isspace(*p))
1611 p++;
f7d78f36
MR
1612 if (av_strstart(p, "http://", NULL) ||
1613 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1614 return AVPROBE_SCORE_MAX;
1615 return 0;
1616}
1617
e8acf0ed 1618static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1619{
1620 char buf[4096], *q;
1621 int c;
1622 AVFormatContext *ic = NULL;
e8acf0ed 1623 ByteIOContext *f = s->pb;
1617ad97
FB
1624
1625 /* parse each URL and try to open it */
1626 c = url_fgetc(f);
1627 while (c != URL_EOF) {
1628 /* skip spaces */
1629 for(;;) {
1630 if (!redir_isspace(c))
1631 break;
1632 c = url_fgetc(f);
1633 }
1634 if (c == URL_EOF)
1635 break;
1636 /* record url */
1637 q = buf;
1638 for(;;) {
1639 if (c == URL_EOF || redir_isspace(c))
1640 break;
1641 if ((q - buf) < sizeof(buf) - 1)
1642 *q++ = c;
1643 c = url_fgetc(f);
1644 }
1645 *q = '\0';
1646 //printf("URL='%s'\n", buf);
1647 /* try to open the media file */
1648 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1649 break;
1650 }
1617ad97 1651 if (!ic)
6f3e0b21 1652 return AVERROR(EIO);
e8acf0ed
LA
1653
1654 *s = *ic;
1655 url_fclose(f);
1656
1657 return 0;
1617ad97
FB
1658}
1659
d2a067d1 1660AVInputFormat redir_demuxer = {
1617ad97 1661 "redir",
bde15e74 1662 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1663 0,
1664 redir_probe,
e8acf0ed 1665 redir_read_header,
1617ad97
FB
1666 NULL,
1667 NULL,
1668};
e7047005 1669#endif