Factorize out common code for opening of the RTP parsing context between
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
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3 * Copyright (c) 2002 Fabrice Bellard.
4 *
b78e7197
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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>
438fcb75 29#include <unistd.h> /* for select() prototype */
ea452b54 30#include <strings.h>
42572ef5 31#include "network.h"
c971ff19 32#include "rtsp.h"
1617ad97 33
4934884a 34#include "rtp_internal.h"
e9dea59f 35#include "rdt.h"
4934884a 36
1617ad97 37//#define DEBUG
b6892136 38//#define DEBUG_RTP_TCP
1617ad97 39
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40enum RTSPClientState {
41 RTSP_STATE_IDLE,
42 RTSP_STATE_PLAYING,
43 RTSP_STATE_PAUSED,
44};
45
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46enum RTSPServerType {
47 RTSP_SERVER_RTP, /*< Standard-compliant RTP-server */
48 RTSP_SERVER_RDT, /*< Realmedia-style server */
49 RTSP_SERVER_LAST
50};
51
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52typedef struct RTSPState {
53 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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54 int nb_rtsp_streams;
55 struct RTSPStream **rtsp_streams;
115329f1 56
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57 enum RTSPClientState state;
58 int64_t seek_timestamp;
115329f1 59
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60 /* XXX: currently we use unbuffered input */
61 // ByteIOContext rtsp_gb;
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62 int seq; /* RTSP command sequence number */
63 char session_id[512];
64 enum RTSPProtocol protocol;
e0776043 65 enum RTSPServerType server_type;
1617ad97 66 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 67 RTPDemuxContext *cur_rtp;
1256d16b 68 int need_subscription;
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69} RTSPState;
70
71typedef struct RTSPStream {
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72 URLContext *rtp_handle; /* RTP stream handle */
73 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 74
8b1ab7bf 75 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 76 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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77 char control_url[1024]; /* url for this stream (from SDP) */
78
79 int sdp_port; /* port (from SDP content - not used in RTSP) */
80 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
81 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
82 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 83 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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84
85 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
86 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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87} RTSPStream;
88
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89static int rtsp_read_play(AVFormatContext *s);
90
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91/* XXX: currently, the only way to change the protocols consists in
92 changing this variable */
1617ad97 93
c482500f 94#if LIBAVFORMAT_VERSION_INT < (53 << 16)
d1ccf0e0 95int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
c482500f 96#endif
85fb7b34 97
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98static int rtsp_probe(AVProbeData *p)
99{
f7d78f36 100 if (av_strstart(p->filename, "rtsp:", NULL))
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101 return AVPROBE_SCORE_MAX;
102 return 0;
103}
104
105static int redir_isspace(int c)
106{
ccd425e7 107 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
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108}
109
110static void skip_spaces(const char **pp)
111{
112 const char *p;
113 p = *pp;
114 while (redir_isspace(*p))
115 p++;
116 *pp = p;
117}
118
115329f1 119static void get_word_sep(char *buf, int buf_size, const char *sep,
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120 const char **pp)
121{
122 const char *p;
123 char *q;
124
125 p = *pp;
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126 if (*p == '/')
127 p++;
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128 skip_spaces(&p);
129 q = buf;
130 while (!strchr(sep, *p) && *p != '\0') {
131 if ((q - buf) < buf_size - 1)
132 *q++ = *p;
133 p++;
134 }
135 if (buf_size > 0)
136 *q = '\0';
137 *pp = p;
138}
139
140static void get_word(char *buf, int buf_size, const char **pp)
141{
142 const char *p;
143 char *q;
144
145 p = *pp;
146 skip_spaces(&p);
147 q = buf;
148 while (!redir_isspace(*p) && *p != '\0') {
149 if ((q - buf) < buf_size - 1)
150 *q++ = *p;
151 p++;
152 }
153 if (buf_size > 0)
154 *q = '\0';
155 *pp = p;
156}
157
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158/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
159 params>] */
4934884a 160static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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161{
162 char buf[256];
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163 int i;
164 AVCodec *c;
7b49ce2e 165 const char *c_name;
93ced3e8 166
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167 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
168 see if we can handle this kind of payload */
93ced3e8 169 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 170 if (payload_type >= RTP_PT_PRIVATE) {
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171 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
172 while(handler) {
173 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
174 codec->codec_id = handler->codec_id;
175 rtsp_st->dynamic_handler= handler;
176 if(handler->open) {
177 rtsp_st->dynamic_protocol_context= handler->open();
178 }
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179 break;
180 }
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181 handler= handler->next;
182 }
93ced3e8 183 } else {
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184 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
185 /* search into AVRtpPayloadTypes[] */
7ed19d7f 186 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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187 }
188
189 c = avcodec_find_decoder(codec->codec_id);
190 if (c && c->name)
7b49ce2e 191 c_name = c->name;
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192 else
193 c_name = (char *)NULL;
194
195 if (c_name) {
196 get_word_sep(buf, sizeof(buf), "/", &p);
197 i = atoi(buf);
198 switch (codec->codec_type) {
199 case CODEC_TYPE_AUDIO:
200 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
201 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
202 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
203 if (i > 0) {
204 codec->sample_rate = i;
205 get_word_sep(buf, sizeof(buf), "/", &p);
206 i = atoi(buf);
207 if (i > 0)
208 codec->channels = i;
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209 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
210 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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211 }
212 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
213 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
214 break;
215 case CODEC_TYPE_VIDEO:
216 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
217 break;
218 default:
219 break;
220 }
221 return 0;
93ced3e8 222 }
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223
224 return -1;
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225}
226
227/* return the length and optionnaly the data */
228static int hex_to_data(uint8_t *data, const char *p)
229{
230 int c, len, v;
231
232 len = 0;
233 v = 1;
234 for(;;) {
235 skip_spaces(&p);
236 if (p == '\0')
237 break;
238 c = toupper((unsigned char)*p++);
239 if (c >= '0' && c <= '9')
240 c = c - '0';
241 else if (c >= 'A' && c <= 'F')
242 c = c - 'A' + 10;
243 else
244 break;
245 v = (v << 4) | c;
246 if (v & 0x100) {
247 if (data)
248 data[len] = v;
249 len++;
250 v = 1;
251 }
252 }
253 return len;
254}
255
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256static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
257{
258 switch (codec->codec_id) {
259 case CODEC_ID_MPEG4:
cbee7a69 260 case CODEC_ID_AAC:
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RD
261 if (!strcmp(attr, "config")) {
262 /* decode the hexa encoded parameter */
263 int len = hex_to_data(NULL, value);
264 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
265 if (!codec->extradata)
266 return;
267 codec->extradata_size = len;
268 hex_to_data(codec->extradata, value);
269 }
270 break;
271 default:
272 break;
273 }
274 return;
275}
276
277typedef struct attrname_map
278{
7b49ce2e 279 const char *str;
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280 uint16_t type;
281 uint32_t offset;
282} attrname_map_t;
283
284/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
285#define ATTR_NAME_TYPE_INT 0
286#define ATTR_NAME_TYPE_STR 1
287static attrname_map_t attr_names[]=
288{
289 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
290 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
291 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
292 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
293 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
294 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
295 {NULL, -1, -1},
296};
297
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298/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
299* because it is used in rtp_h264.c, which is forthcoming.
300*/
301int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
302{
303 skip_spaces(p);
304 if(**p)
305 {
306 get_word_sep(attr, attr_size, "=", p);
307 if (**p == '=')
308 (*p)++;
309 get_word_sep(value, value_size, ";", p);
310 if (**p == ';')
311 (*p)++;
312 return 1;
313 }
314 return 0;
315}
316
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317/* parse a SDP line and save stream attributes */
318static void sdp_parse_fmtp(AVStream *st, const char *p)
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319{
320 char attr[256];
321 char value[4096];
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322 int i;
323
324 RTSPStream *rtsp_st = st->priv_data;
01f4895c 325 AVCodecContext *codec = st->codec;
d1ccf0e0 326 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
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327
328 /* loop on each attribute */
1ad20f96
RM
329 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
330 {
bb270c08 331 /* grab the codec extra_data from the config parameter of the fmtp line */
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RD
332 sdp_parse_fmtp_config(codec, attr, value);
333 /* Looking for a known attribute */
334 for (i = 0; attr_names[i].str; ++i) {
335 if (!strcasecmp(attr, attr_names[i].str)) {
336 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
337 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
338 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
339 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 340 }
93ced3e8 341 }
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342 }
343}
344
31693e00
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345/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
346 * and end time.
347 * Used for seeking in the rtp stream.
348 */
349static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
350{
351 char buf[256];
352
353 skip_spaces(&p);
f7d78f36 354 if (!av_stristart(p, "npt=", &p))
31693e00
RM
355 return;
356
357 *start = AV_NOPTS_VALUE;
358 *end = AV_NOPTS_VALUE;
359
360 get_word_sep(buf, sizeof(buf), "-", &p);
361 *start = parse_date(buf, 1);
362 if (*p == '-') {
363 p++;
364 get_word_sep(buf, sizeof(buf), "-", &p);
365 *end = parse_date(buf, 1);
366 }
367// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
368// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
369}
370
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371typedef struct SDPParseState {
372 /* SDP only */
373 struct in_addr default_ip;
374 int default_ttl;
375} SDPParseState;
376
377static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
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378 int letter, const char *buf)
379{
8b1ab7bf 380 RTSPState *rt = s->priv_data;
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381 char buf1[64], st_type[64];
382 const char *p;
93ced3e8 383 int codec_type, payload_type, i;
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384 AVStream *st;
385 RTSPStream *rtsp_st;
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386 struct in_addr sdp_ip;
387 int ttl;
388
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389#ifdef DEBUG
390 printf("sdp: %c='%s'\n", letter, buf);
391#endif
392
393 p = buf;
394 switch(letter) {
93ced3e8
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395 case 'c':
396 get_word(buf1, sizeof(buf1), &p);
397 if (strcmp(buf1, "IN") != 0)
398 return;
399 get_word(buf1, sizeof(buf1), &p);
400 if (strcmp(buf1, "IP4") != 0)
401 return;
402 get_word_sep(buf1, sizeof(buf1), "/", &p);
403 if (inet_aton(buf1, &sdp_ip) == 0)
404 return;
405 ttl = 16;
406 if (*p == '/') {
407 p++;
408 get_word_sep(buf1, sizeof(buf1), "/", &p);
409 ttl = atoi(buf1);
410 }
411 if (s->nb_streams == 0) {
412 s1->default_ip = sdp_ip;
413 s1->default_ttl = ttl;
414 } else {
415 st = s->streams[s->nb_streams - 1];
416 rtsp_st = st->priv_data;
417 rtsp_st->sdp_ip = sdp_ip;
418 rtsp_st->sdp_ttl = ttl;
419 }
420 break;
1617ad97 421 case 's':
75e61b0e 422 av_strlcpy(s->title, p, sizeof(s->title));
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423 break;
424 case 'i':
425 if (s->nb_streams == 0) {
75e61b0e 426 av_strlcpy(s->comment, p, sizeof(s->comment));
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427 break;
428 }
429 break;
430 case 'm':
431 /* new stream */
432 get_word(st_type, sizeof(st_type), &p);
433 if (!strcmp(st_type, "audio")) {
434 codec_type = CODEC_TYPE_AUDIO;
435 } else if (!strcmp(st_type, "video")) {
436 codec_type = CODEC_TYPE_VIDEO;
437 } else {
438 return;
439 }
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440 rtsp_st = av_mallocz(sizeof(RTSPStream));
441 if (!rtsp_st)
442 return;
8b1ab7bf
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443 rtsp_st->stream_index = -1;
444 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
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445
446 rtsp_st->sdp_ip = s1->default_ip;
447 rtsp_st->sdp_ttl = s1->default_ttl;
448
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449 get_word(buf1, sizeof(buf1), &p); /* port */
450 rtsp_st->sdp_port = atoi(buf1);
451
452 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 453
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FB
454 /* XXX: handle list of formats */
455 get_word(buf1, sizeof(buf1), &p); /* format list */
456 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 457
7ed19d7f 458 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
459 /* no corresponding stream */
460 } else {
461 st = av_new_stream(s, 0);
462 if (!st)
463 return;
464 st->priv_data = rtsp_st;
465 rtsp_st->stream_index = st->index;
01f4895c 466 st->codec->codec_type = codec_type;
d1ccf0e0 467 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 468 /* if standard payload type, we can find the codec right now */
01f4895c 469 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
470 }
471 }
1617ad97 472 /* put a default control url */
75e61b0e 473 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
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474 break;
475 case 'a':
f7d78f36 476 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
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477 char proto[32];
478 /* get the control url */
479 st = s->streams[s->nb_streams - 1];
480 rtsp_st = st->priv_data;
115329f1 481
1617ad97 482 /* XXX: may need to add full url resolution */
6ba5cbc6 483 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
1617ad97
FB
484 if (proto[0] == '\0') {
485 /* relative control URL */
75e61b0e
MR
486 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
487 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 488 } else {
75e61b0e 489 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 490 }
f7d78f36 491 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 492 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 493 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
494 payload_type = atoi(buf1);
495 for(i = 0; i < s->nb_streams;i++) {
496 st = s->streams[i];
497 rtsp_st = st->priv_data;
498 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 499 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
FB
500 }
501 }
f7d78f36 502 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 503 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 504 get_word(buf1, sizeof(buf1), &p);
93ced3e8
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505 payload_type = atoi(buf1);
506 for(i = 0; i < s->nb_streams;i++) {
507 st = s->streams[i];
508 rtsp_st = st->priv_data;
509 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a
RM
510 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
511 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
512 sdp_parse_fmtp(st, p);
513 }
514 } else {
ed787542 515 sdp_parse_fmtp(st, p);
4934884a 516 }
93ced3e8
FB
517 }
518 }
f7d78f36 519 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
520 // let dynamic protocol handlers have a stab at the line.
521 get_word(buf1, sizeof(buf1), &p);
522 payload_type = atoi(buf1);
523 for(i = 0; i < s->nb_streams;i++) {
524 st = s->streams[i];
525 rtsp_st = st->priv_data;
526 if (rtsp_st->sdp_payload_type == payload_type) {
527 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
528 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
529 }
530 }
531 }
f7d78f36 532 } else if(av_strstart(p, "range:", &p)) {
31693e00
RM
533 int64_t start, end;
534
535 // this is so that seeking on a streamed file can work.
536 rtsp_parse_range_npt(p, &start, &end);
537 s->start_time= start;
538 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
8646b907
RB
539 } else if (s->nb_streams > 0) {
540 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
541 if (rtsp_st->dynamic_handler &&
542 rtsp_st->dynamic_handler->parse_sdp_a_line)
543 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
544 rtsp_st->dynamic_protocol_context, buf);
1617ad97
FB
545 }
546 break;
547 }
548}
549
5c91a675 550static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
551{
552 const char *p;
553 int letter;
d6bb9ebd 554 char buf[2048], *q;
93ced3e8 555 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 556
93ced3e8 557 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
558 p = content;
559 for(;;) {
560 skip_spaces(&p);
561 letter = *p;
562 if (letter == '\0')
563 break;
564 p++;
565 if (*p != '=')
566 goto next_line;
567 p++;
568 /* get the content */
569 q = buf;
b6892136 570 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
571 if ((q - buf) < sizeof(buf) - 1)
572 *q++ = *p;
573 p++;
574 }
575 *q = '\0';
93ced3e8 576 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
577 next_line:
578 while (*p != '\n' && *p != '\0')
579 p++;
580 if (*p == '\n')
581 p++;
582 }
583 return 0;
584}
585
586static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
587{
588 const char *p;
589 int v;
590
591 p = *pp;
592 skip_spaces(&p);
593 v = strtol(p, (char **)&p, 10);
594 if (*p == '-') {
595 p++;
596 *min_ptr = v;
597 v = strtol(p, (char **)&p, 10);
598 *max_ptr = v;
599 } else {
600 *min_ptr = v;
601 *max_ptr = v;
602 }
603 *pp = p;
604}
605
606/* XXX: only one transport specification is parsed */
607static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
608{
609 char transport_protocol[16];
610 char profile[16];
611 char lower_transport[16];
612 char parameter[16];
613 RTSPTransportField *th;
614 char buf[256];
115329f1 615
1617ad97 616 reply->nb_transports = 0;
115329f1 617
1617ad97
FB
618 for(;;) {
619 skip_spaces(&p);
620 if (*p == '\0')
621 break;
622
623 th = &reply->transports[reply->nb_transports];
624
115329f1 625 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
626 "/", &p);
627 if (*p == '/')
628 p++;
e1502118 629 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
630 get_word_sep(profile, sizeof(profile), "/;,", &p);
631 lower_transport[0] = '\0';
632 /* rtp/avp/<protocol> */
633 if (*p == '/') {
634 p++;
635 get_word_sep(lower_transport, sizeof(lower_transport),
636 ";,", &p);
637 }
638 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
639 /* x-pn-tng/<protocol> */
e1502118
LB
640 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
641 profile[0] = '\0';
1617ad97 642 }
b6892136 643 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
644 th->protocol = RTSP_PROTOCOL_RTP_TCP;
645 else
646 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 647
1617ad97
FB
648 if (*p == ';')
649 p++;
650 /* get each parameter */
651 while (*p != '\0' && *p != ',') {
652 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
653 if (!strcmp(parameter, "port")) {
654 if (*p == '=') {
655 p++;
656 rtsp_parse_range(&th->port_min, &th->port_max, &p);
657 }
658 } else if (!strcmp(parameter, "client_port")) {
659 if (*p == '=') {
660 p++;
115329f1 661 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
662 &th->client_port_max, &p);
663 }
664 } else if (!strcmp(parameter, "server_port")) {
665 if (*p == '=') {
666 p++;
115329f1 667 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
668 &th->server_port_max, &p);
669 }
670 } else if (!strcmp(parameter, "interleaved")) {
671 if (*p == '=') {
672 p++;
115329f1 673 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
674 &th->interleaved_max, &p);
675 }
676 } else if (!strcmp(parameter, "multicast")) {
677 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
678 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
679 } else if (!strcmp(parameter, "ttl")) {
680 if (*p == '=') {
681 p++;
682 th->ttl = strtol(p, (char **)&p, 10);
683 }
684 } else if (!strcmp(parameter, "destination")) {
685 struct in_addr ipaddr;
686
687 if (*p == '=') {
688 p++;
689 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 690 if (inet_aton(buf, &ipaddr))
1617ad97
FB
691 th->destination = ntohl(ipaddr.s_addr);
692 }
693 }
694 while (*p != ';' && *p != '\0' && *p != ',')
695 p++;
696 if (*p == ';')
697 p++;
698 }
699 if (*p == ',')
700 p++;
701
702 reply->nb_transports++;
703 }
704}
705
706void rtsp_parse_line(RTSPHeader *reply, const char *buf)
707{
708 const char *p;
709
710 /* NOTE: we do case independent match for broken servers */
711 p = buf;
f7d78f36 712 if (av_stristart(p, "Session:", &p)) {
1617ad97 713 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 714 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 715 reply->content_length = strtol(p, NULL, 10);
f7d78f36 716 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 717 rtsp_parse_transport(reply, p);
f7d78f36 718 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 719 reply->seq = strtol(p, NULL, 10);
f7d78f36 720 } else if (av_stristart(p, "Range:", &p)) {
31693e00 721 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
722 } else if (av_stristart(p, "RealChallenge1:", &p)) {
723 skip_spaces(&p);
724 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
1617ad97
FB
725 }
726}
727
2a42b5c3
LS
728static int url_readbuf(URLContext *h, unsigned char *buf, int size)
729{
730 int ret, len;
731
732 len = 0;
733 while (len < size) {
734 ret = url_read(h, buf+len, size-len);
735 if (ret < 1)
736 return ret;
737 len += ret;
738 }
739 return len;
740}
741
b7b8fc34
FB
742/* skip a RTP/TCP interleaved packet */
743static void rtsp_skip_packet(AVFormatContext *s)
744{
745 RTSPState *rt = s->priv_data;
746 int ret, len, len1;
747 uint8_t buf[1024];
748
2a42b5c3 749 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
750 if (ret != 3)
751 return;
80fb8234 752 len = AV_RB16(buf + 1);
b7b8fc34
FB
753#ifdef DEBUG
754 printf("skipping RTP packet len=%d\n", len);
755#endif
756 /* skip payload */
757 while (len > 0) {
758 len1 = len;
759 if (len1 > sizeof(buf))
760 len1 = sizeof(buf);
2a42b5c3 761 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
762 if (ret != len1)
763 return;
764 len -= len1;
765 }
766}
1617ad97 767
115329f1
DB
768static void rtsp_send_cmd(AVFormatContext *s,
769 const char *cmd, RTSPHeader *reply,
1617ad97
FB
770 unsigned char **content_ptr)
771{
772 RTSPState *rt = s->priv_data;
773 char buf[4096], buf1[1024], *q;
774 unsigned char ch;
775 const char *p;
776 int content_length, line_count;
777 unsigned char *content = NULL;
778
779 memset(reply, 0, sizeof(RTSPHeader));
780
781 rt->seq++;
75e61b0e 782 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 783 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 784 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 785 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 786 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 787 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 788 }
75e61b0e 789 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
790#ifdef DEBUG
791 printf("Sending:\n%s--\n", buf);
792#endif
793 url_write(rt->rtsp_hd, buf, strlen(buf));
794
795 /* parse reply (XXX: use buffers) */
796 line_count = 0;
797 rt->last_reply[0] = '\0';
798 for(;;) {
799 q = buf;
800 for(;;) {
2a42b5c3 801 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
802 break;
803 if (ch == '\n')
804 break;
b7b8fc34
FB
805 if (ch == '$') {
806 /* XXX: only parse it if first char on line ? */
807 rtsp_skip_packet(s);
808 } else if (ch != '\r') {
1617ad97
FB
809 if ((q - buf) < sizeof(buf) - 1)
810 *q++ = ch;
811 }
812 }
813 *q = '\0';
814#ifdef DEBUG
815 printf("line='%s'\n", buf);
816#endif
817 /* test if last line */
818 if (buf[0] == '\0')
819 break;
820 p = buf;
821 if (line_count == 0) {
822 /* get reply code */
823 get_word(buf1, sizeof(buf1), &p);
824 get_word(buf1, sizeof(buf1), &p);
825 reply->status_code = atoi(buf1);
826 } else {
827 rtsp_parse_line(reply, p);
75e61b0e
MR
828 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
829 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
830 }
831 line_count++;
832 }
115329f1 833
1617ad97 834 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 835 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 836
1617ad97
FB
837 content_length = reply->content_length;
838 if (content_length > 0) {
839 /* leave some room for a trailing '\0' (useful for simple parsing) */
840 content = av_malloc(content_length + 1);
2a42b5c3 841 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
842 content[content_length] = '\0';
843 }
844 if (content_ptr)
845 *content_ptr = content;
e2e2e7dd
AB
846 else
847 av_free(content);
1617ad97
FB
848}
849
1617ad97 850
8b1ab7bf
FB
851/* close and free RTSP streams */
852static void rtsp_close_streams(RTSPState *rt)
853{
854 int i;
855 RTSPStream *rtsp_st;
856
857 for(i=0;i<rt->nb_rtsp_streams;i++) {
858 rtsp_st = rt->rtsp_streams[i];
859 if (rtsp_st) {
860 if (rtsp_st->rtp_ctx)
861 rtp_parse_close(rtsp_st->rtp_ctx);
862 if (rtsp_st->rtp_handle)
863 url_close(rtsp_st->rtp_handle);
4934884a
RM
864 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
865 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 866 }
8b1ab7bf
FB
867 }
868 av_free(rt->rtsp_streams);
869}
870
ee0cb67f
RB
871static int
872rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
873{
874 AVStream *st = NULL;
875
876 /* open the RTP context */
877 if (rtsp_st->stream_index >= 0)
878 st = s->streams[rtsp_st->stream_index];
879 if (!st)
880 s->ctx_flags |= AVFMTCTX_NOHEADER;
881 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
882
883 if (!rtsp_st->rtp_ctx) {
884 return AVERROR(ENOMEM);
885 } else {
886 if(rtsp_st->dynamic_handler) {
887 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
888 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
889 }
890 }
891
892 return 0;
893}
894
53620bba
RB
895/**
896 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
897 */
898static int
e9dea59f
RB
899make_setup_request (AVFormatContext *s, const char *host, int port,
900 int protocol, const char *real_challenge)
1617ad97
FB
901{
902 RTSPState *rt = s->priv_data;
53620bba 903 int j, i, err;
1617ad97 904 RTSPStream *rtsp_st;
53620bba
RB
905 RTSPHeader reply1, *reply = &reply1;
906 char cmd[2048];
e9dea59f
RB
907 const char *trans_pref;
908
909 if (rt->server_type == RTSP_SERVER_RDT)
910 trans_pref = "x-pn-tng";
911 else
912 trans_pref = "RTP/AVP";
115329f1 913
1617ad97
FB
914 /* for each stream, make the setup request */
915 /* XXX: we assume the same server is used for the control of each
916 RTSP stream */
d1ccf0e0
RD
917
918 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
919 char transport[2048];
920
8b1ab7bf 921 rtsp_st = rt->rtsp_streams[i];
1617ad97 922
1617ad97 923 /* RTP/UDP */
8792f52a 924 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
85fb7b34 925 char buf[256];
85fb7b34
FB
926
927 /* first try in specified port range */
d1ccf0e0
RD
928 if (RTSP_RTP_PORT_MIN != 0) {
929 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 930 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 931 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 932 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 933 goto rtp_opened;
d1ccf0e0 934 }
85fb7b34 935 }
1617ad97 936 }
85fb7b34 937
d1ccf0e0
RD
938/* then try on any port
939** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
940** err = AVERROR_INVALIDDATA;
941** goto fail;
942** }
943*/
85fb7b34
FB
944
945 rtp_opened:
8b1ab7bf 946 port = rtp_get_local_port(rtsp_st->rtp_handle);
0ad306bc 947 snprintf(transport, sizeof(transport) - 1,
e9dea59f
RB
948 "%s/UDP;unicast;client_port=%d",
949 trans_pref, port);
950 if (rt->server_type == RTSP_SERVER_RTP)
951 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
952 }
953
954 /* RTP/TCP */
8792f52a 955 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
0ad306bc 956 snprintf(transport, sizeof(transport) - 1,
e9dea59f 957 "%s/TCP", trans_pref);
1617ad97
FB
958 }
959
8792f52a 960 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
0ad306bc 961 snprintf(transport, sizeof(transport) - 1,
e9dea59f 962 "%s/UDP;multicast", trans_pref);
1617ad97 963 }
e9dea59f
RB
964 if (rt->server_type == RTSP_SERVER_RDT)
965 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 966 snprintf(cmd, sizeof(cmd),
b6892136
FB
967 "SETUP %s RTSP/1.0\r\n"
968 "Transport: %s\r\n",
1617ad97 969 rtsp_st->control_url, transport);
e9dea59f
RB
970 if (i == 0 && rt->server_type == RTSP_SERVER_RDT) {
971 char real_res[41], real_csum[9];
972 ff_rdt_calc_response_and_checksum(real_res, real_csum,
973 real_challenge);
974 av_strlcatf(cmd, sizeof(cmd),
975 "If-Match: %s\r\n"
976 "RealChallenge2: %s, sd=%s\r\n",
977 rt->session_id, real_res, real_csum);
978 }
1617ad97 979 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
980 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
981 err = 1;
982 goto fail;
7e6ca34f
RB
983 } else if (reply->status_code != RTSP_STATUS_OK ||
984 reply->nb_transports != 1) {
1617ad97
FB
985 err = AVERROR_INVALIDDATA;
986 goto fail;
987 }
988
989 /* XXX: same protocol for all streams is required */
990 if (i > 0) {
991 if (reply->transports[0].protocol != rt->protocol) {
992 err = AVERROR_INVALIDDATA;
993 goto fail;
994 }
995 } else {
996 rt->protocol = reply->transports[0].protocol;
997 }
998
999 /* close RTP connection if not choosen */
1000 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
8792f52a 1001 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
8b1ab7bf
FB
1002 url_close(rtsp_st->rtp_handle);
1003 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1004 }
1005
1006 switch(reply->transports[0].protocol) {
1007 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
1008 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1009 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1010 break;
115329f1 1011
1617ad97
FB
1012 case RTSP_PROTOCOL_RTP_UDP:
1013 {
1014 char url[1024];
115329f1 1015
1617ad97 1016 /* XXX: also use address if specified */
115329f1 1017 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1018 host, reply->transports[0].server_port_min);
8b1ab7bf 1019 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1020 err = AVERROR_INVALIDDATA;
1021 goto fail;
1022 }
1023 }
1024 break;
1025 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1026 {
1027 char url[1024];
d02678ec 1028 struct in_addr in;
1617ad97 1029
d02678ec 1030 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 1031 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
1032 inet_ntoa(in),
1033 reply->transports[0].port_min,
1034 reply->transports[0].ttl);
dbf30963 1035 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1036 err = AVERROR_INVALIDDATA;
1037 goto fail;
1038 }
1039 }
1040 break;
1041 }
d1ccf0e0 1042
ee0cb67f 1043 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1044 goto fail;
1617ad97
FB
1045 }
1046
1256d16b
RB
1047 if (rt->server_type == RTSP_SERVER_RDT)
1048 rt->need_subscription = 1;
1049
53620bba
RB
1050 return 0;
1051
1052fail:
8a8754d8
RB
1053 for (i=0; i<rt->nb_rtsp_streams; i++) {
1054 if (rt->rtsp_streams[i]->rtp_handle) {
1055 url_close(rt->rtsp_streams[i]->rtp_handle);
1056 rt->rtsp_streams[i]->rtp_handle = NULL;
1057 }
1058 }
53620bba
RB
1059 return err;
1060}
1061
1062static int rtsp_read_header(AVFormatContext *s,
1063 AVFormatParameters *ap)
1064{
1065 RTSPState *rt = s->priv_data;
1066 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1067 URLContext *rtsp_hd;
1068 int port, ret, err;
1069 RTSPHeader reply1, *reply = &reply1;
1070 unsigned char *content = NULL;
1071 int protocol_mask = 0;
1cf151e9 1072 char real_challenge[64];
53620bba
RB
1073
1074 /* extract hostname and port */
1075 url_split(NULL, 0, NULL, 0,
1076 host, sizeof(host), &port, path, sizeof(path), s->filename);
1077 if (port < 0)
1078 port = RTSP_DEFAULT_PORT;
1079
1080 /* search for options */
1081 option_list = strchr(path, '?');
1082 if (option_list) {
1083 /* remove the options from the path */
1084 *option_list++ = 0;
1085 while(option_list) {
1086 /* move the option pointer */
1087 option = option_list;
1088 option_list = strchr(option_list, '&');
1089 if (option_list)
1090 *(option_list++) = 0;
1091 /* handle the options */
1092 if (strcmp(option, "udp") == 0)
1093 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1094 else if (strcmp(option, "multicast") == 0)
1095 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1096 else if (strcmp(option, "tcp") == 0)
1097 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1098 }
1099 }
1100
1101 if (!protocol_mask)
8a8754d8 1102 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
53620bba
RB
1103
1104 /* open the tcp connexion */
1105 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1106 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1107 return AVERROR(EIO);
1108 rt->rtsp_hd = rtsp_hd;
1109 rt->seq = 0;
1110
1cf151e9
RB
1111 /* request options supported by the server; this also detects server type */
1112 for (rt->server_type = RTSP_SERVER_RTP;;) {
1113 snprintf(cmd, sizeof(cmd),
1114 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1115 if (rt->server_type == RTSP_SERVER_RDT)
1116 av_strlcat(cmd,
1117 /**
1118 * The following entries are required for proper
1119 * streaming from a Realmedia server. They are
1120 * interdependent in some way although we currently
1121 * don't quite understand how. Values were copied
1122 * from mplayer SVN r23589.
1123 * @param CompanyID is a 16-byte ID in base64
1124 * @param ClientChallenge is a 16-byte ID in hex
1125 */
1126 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1127 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1128 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1129 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1130 sizeof(cmd));
1131 rtsp_send_cmd(s, cmd, reply, NULL);
1132 if (reply->status_code != RTSP_STATUS_OK) {
1133 err = AVERROR_INVALIDDATA;
1134 goto fail;
1135 }
1136
1137 /* detect server type if not standard-compliant RTP */
1138 if (rt->server_type != RTSP_SERVER_RDT && reply->real_challenge[0]) {
1139 rt->server_type = RTSP_SERVER_RDT;
1140 continue;
1141 } else if (rt->server_type == RTSP_SERVER_RDT) {
1142 strcpy(real_challenge, reply->real_challenge);
1143 }
1144 break;
1145 }
1146
53620bba
RB
1147 /* describe the stream */
1148 snprintf(cmd, sizeof(cmd),
1149 "DESCRIBE %s RTSP/1.0\r\n"
1150 "Accept: application/sdp\r\n",
1151 s->filename);
897ade1b
RB
1152 if (rt->server_type == RTSP_SERVER_RDT) {
1153 /**
1154 * The Require: attribute is needed for proper streaming from
1155 * Realmedia servers.
1156 */
1157 av_strlcat(cmd,
1158 "Require: com.real.retain-entity-for-setup\r\n",
1159 sizeof(cmd));
1160 }
53620bba
RB
1161 rtsp_send_cmd(s, cmd, reply, &content);
1162 if (!content) {
1163 err = AVERROR_INVALIDDATA;
1164 goto fail;
1165 }
1166 if (reply->status_code != RTSP_STATUS_OK) {
1167 err = AVERROR_INVALIDDATA;
1168 goto fail;
1169 }
1170
1171 /* now we got the SDP description, we parse it */
1172 ret = sdp_parse(s, (const char *)content);
1173 av_freep(&content);
1174 if (ret < 0) {
1175 err = AVERROR_INVALIDDATA;
1176 goto fail;
1177 }
1178
8a8754d8 1179 do {
8792f52a 1180 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
8a8754d8 1181
e9dea59f
RB
1182 err = make_setup_request(s, host, port, protocol,
1183 rt->server_type == RTSP_SERVER_RDT ?
1184 real_challenge : NULL);
8a8754d8 1185 if (err < 0)
7e6ca34f 1186 goto fail;
8792f52a 1187 protocol_mask &= ~(1 << protocol);
8a8754d8 1188 if (protocol_mask == 0 && err == 1) {
5ee0e139 1189 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1190 goto fail;
1191 }
1192 } while (err);
53620bba 1193
ff762d6e
FB
1194 rt->state = RTSP_STATE_IDLE;
1195 rt->seek_timestamp = 0; /* default is to start stream at position
1196 zero */
c04c3282 1197 if (ap->initial_pause) {
ff762d6e
FB
1198 /* do not start immediately */
1199 } else {
1200 if (rtsp_read_play(s) < 0) {
1201 err = AVERROR_INVALIDDATA;
1617ad97
FB
1202 goto fail;
1203 }
1204 }
1617ad97
FB
1205 return 0;
1206 fail:
8b1ab7bf 1207 rtsp_close_streams(rt);
1617ad97
FB
1208 av_freep(&content);
1209 url_close(rt->rtsp_hd);
1210 return err;
1211}
1212
8b1ab7bf
FB
1213static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1214 uint8_t *buf, int buf_size)
1617ad97
FB
1215{
1216 RTSPState *rt = s->priv_data;
b6892136 1217 int id, len, i, ret;
1617ad97 1218 RTSPStream *rtsp_st;
1617ad97 1219
b6892136
FB
1220#ifdef DEBUG_RTP_TCP
1221 printf("tcp_read_packet:\n");
1222#endif
1617ad97
FB
1223 redo:
1224 for(;;) {
2a42b5c3 1225 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1226#ifdef DEBUG_RTP_TCP
1227 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1228#endif
1229 if (ret != 1)
8b1ab7bf 1230 return -1;
b6892136 1231 if (buf[0] == '$')
1617ad97
FB
1232 break;
1233 }
2a42b5c3 1234 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1235 if (ret != 3)
8b1ab7bf 1236 return -1;
b6892136 1237 id = buf[0];
80fb8234 1238 len = AV_RB16(buf + 1);
b6892136
FB
1239#ifdef DEBUG_RTP_TCP
1240 printf("id=%d len=%d\n", id, len);
1241#endif
8b1ab7bf 1242 if (len > buf_size || len < 12)
1617ad97
FB
1243 goto redo;
1244 /* get the data */
2a42b5c3 1245 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1246 if (ret != len)
8b1ab7bf 1247 return -1;
115329f1 1248
1617ad97 1249 /* find the matching stream */
8b1ab7bf
FB
1250 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1251 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1252 if (id >= rtsp_st->interleaved_min &&
1253 id <= rtsp_st->interleaved_max)
1617ad97
FB
1254 goto found;
1255 }
1256 goto redo;
1257 found:
8b1ab7bf
FB
1258 *prtsp_st = rtsp_st;
1259 return len;
1617ad97
FB
1260}
1261
115329f1 1262static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1263 uint8_t *buf, int buf_size)
1617ad97 1264{
8b1ab7bf 1265 RTSPState *rt = s->priv_data;
1617ad97
FB
1266 RTSPStream *rtsp_st;
1267 fd_set rfds;
1268 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1269 struct timeval tv;
1270
1271 for(;;) {
b7b8fc34 1272 if (url_interrupt_cb())
a960a1e0 1273 return AVERROR(EINTR);
1617ad97
FB
1274 FD_ZERO(&rfds);
1275 fd_max = -1;
8b1ab7bf
FB
1276 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1277 rtsp_st = rt->rtsp_streams[i];
1617ad97 1278 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1279 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1280 if (fd1 > fd_max)
1281 fd_max = fd1;
1282 FD_SET(fd1, &rfds);
1283 }
1617ad97 1284 tv.tv_sec = 0;
b7b8fc34 1285 tv.tv_usec = 100 * 1000;
1617ad97
FB
1286 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1287 if (n > 0) {
8b1ab7bf
FB
1288 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1289 rtsp_st = rt->rtsp_streams[i];
1290 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1291 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1292 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1293 if (ret > 0) {
1294 *prtsp_st = rtsp_st;
1617ad97
FB
1295 return ret;
1296 }
1297 }
1298 }
1299 }
1300 }
1301}
1302
1303static int rtsp_read_packet(AVFormatContext *s,
1304 AVPacket *pkt)
1305{
1306 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1307 RTSPStream *rtsp_st;
1308 int ret, len;
1309 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1310
1256d16b
RB
1311 if (rt->server_type == RTSP_SERVER_RDT && rt->need_subscription) {
1312 int i;
1313 RTSPHeader reply1, *reply = &reply1;
1314 char cmd[1024];
1315
1316 snprintf(cmd, sizeof(cmd),
1317 "SET_PARAMETER %s RTSP/1.0\r\n"
1318 "Subscribe: ",
1319 s->filename);
1320 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1321 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
1322 ff_rdt_subscribe_rule(
1323 rt->rtsp_streams[i]->rtp_ctx,
1324 cmd, sizeof(cmd), i, 0);
1325 }
1326 av_strlcat(cmd, "\r\n", sizeof(cmd));
1327 rtsp_send_cmd(s, cmd, reply, NULL);
1328 if (reply->status_code != RTSP_STATUS_OK)
1329 return AVERROR_INVALIDDATA;
1330 rt->need_subscription = 0;
1331
1332 if (rt->state == RTSP_STATE_PLAYING)
1333 rtsp_read_play (s);
1334 }
1335
8b1ab7bf
FB
1336 /* get next frames from the same RTP packet */
1337 if (rt->cur_rtp) {
4fce284c
RB
1338 if (rt->server_type == RTSP_SERVER_RDT)
1339 ret = ff_rdt_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1340 else
1341 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
8b1ab7bf
FB
1342 if (ret == 0) {
1343 rt->cur_rtp = NULL;
1344 return 0;
1345 } else if (ret == 1) {
1346 return 0;
1347 } else {
1348 rt->cur_rtp = NULL;
1349 }
1350 }
1617ad97 1351
8b1ab7bf
FB
1352 /* read next RTP packet */
1353 redo:
1617ad97
FB
1354 switch(rt->protocol) {
1355 default:
1356 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1357 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1358 break;
1359 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1360 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1361 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
74ef8b43 1362 if (len >=0 && rtsp_st->rtp_ctx)
dbf30963 1363 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1364 break;
1365 }
8b1ab7bf 1366 if (len < 0)
489b0d4d 1367 return len;
4fce284c
RB
1368 if (rt->server_type == RTSP_SERVER_RDT)
1369 ret = ff_rdt_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1370 else
1371 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
8b1ab7bf
FB
1372 if (ret < 0)
1373 goto redo;
1374 if (ret == 1) {
1375 /* more packets may follow, so we save the RTP context */
1376 rt->cur_rtp = rtsp_st->rtp_ctx;
1377 }
1378 return 0;
1617ad97
FB
1379}
1380
ff762d6e 1381static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1382{
ff762d6e 1383 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1384 RTSPHeader reply1, *reply = &reply1;
1385 char cmd[1024];
1386
bc874dae 1387 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e 1388
1256d16b 1389 if (!(rt->server_type == RTSP_SERVER_RDT && rt->need_subscription)) {
99b2ac07
RB
1390 if (rt->state == RTSP_STATE_PAUSED) {
1391 snprintf(cmd, sizeof(cmd),
1392 "PLAY %s RTSP/1.0\r\n",
1393 s->filename);
1394 } else {
1395 snprintf(cmd, sizeof(cmd),
1396 "PLAY %s RTSP/1.0\r\n"
1397 "Range: npt=%0.3f-\r\n",
1398 s->filename,
1399 (double)rt->seek_timestamp / AV_TIME_BASE);
1400 }
1401 rtsp_send_cmd(s, cmd, reply, NULL);
1402 if (reply->status_code != RTSP_STATUS_OK) {
1403 return -1;
1404 }
1256d16b 1405 }
5f86057f
RB
1406 rt->state = RTSP_STATE_PLAYING;
1407 return 0;
b7b8fc34
FB
1408}
1409
ff762d6e
FB
1410/* pause the stream */
1411static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1412{
ff762d6e 1413 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1414 RTSPHeader reply1, *reply = &reply1;
1415 char cmd[1024];
1416
b7b8fc34 1417 rt = s->priv_data;
115329f1 1418
ff762d6e
FB
1419 if (rt->state != RTSP_STATE_PLAYING)
1420 return 0;
1256d16b 1421 else if (!(rt->server_type == RTSP_SERVER_RDT && rt->need_subscription)) {
99b2ac07
RB
1422 snprintf(cmd, sizeof(cmd),
1423 "PAUSE %s RTSP/1.0\r\n",
1424 s->filename);
1425 rtsp_send_cmd(s, cmd, reply, NULL);
1426 if (reply->status_code != RTSP_STATUS_OK) {
1427 return -1;
1428 }
1256d16b 1429 }
5f86057f
RB
1430 rt->state = RTSP_STATE_PAUSED;
1431 return 0;
b7b8fc34
FB
1432}
1433
115329f1 1434static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1435 int64_t timestamp, int flags)
ff762d6e
FB
1436{
1437 RTSPState *rt = s->priv_data;
115329f1 1438
50755217 1439 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1440 switch(rt->state) {
1441 default:
1442 case RTSP_STATE_IDLE:
1443 break;
1444 case RTSP_STATE_PLAYING:
1445 if (rtsp_read_play(s) != 0)
1446 return -1;
1447 break;
1448 case RTSP_STATE_PAUSED:
1449 rt->state = RTSP_STATE_IDLE;
1450 break;
1451 }
1452 return 0;
1453}
1454
1617ad97
FB
1455static int rtsp_read_close(AVFormatContext *s)
1456{
1457 RTSPState *rt = s->priv_data;
1617ad97 1458 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1459 char cmd[1024];
1460
b6892136 1461#if 0
1617ad97
FB
1462 /* NOTE: it is valid to flush the buffer here */
1463 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1464 url_fclose(&rt->rtsp_gb);
1465 }
b6892136 1466#endif
115329f1 1467 snprintf(cmd, sizeof(cmd),
b6892136 1468 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1469 s->filename);
1470 rtsp_send_cmd(s, cmd, reply, NULL);
1471
8b1ab7bf 1472 rtsp_close_streams(rt);
1617ad97
FB
1473 url_close(rt->rtsp_hd);
1474 return 0;
1475}
1476
96862926 1477#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1478AVInputFormat rtsp_demuxer = {
1617ad97 1479 "rtsp",
bde15e74 1480 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1481 sizeof(RTSPState),
1482 rtsp_probe,
1483 rtsp_read_header,
1484 rtsp_read_packet,
1485 rtsp_read_close,
ff762d6e 1486 rtsp_read_seek,
bb76a117 1487 .flags = AVFMT_NOFILE,
ff762d6e
FB
1488 .read_play = rtsp_read_play,
1489 .read_pause = rtsp_read_pause,
1617ad97 1490};
96862926 1491#endif
1617ad97 1492
cb1fdc61 1493static int sdp_probe(AVProbeData *p1)
93ced3e8 1494{
0e1ceacd 1495 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1496
1497 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1498 while (p < p_end && *p != '\0') {
f7d78f36 1499 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1500 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1501
1502 while(p < p_end - 1 && *p != '\n') p++;
1503 if (++p >= p_end)
cb1fdc61 1504 break;
cb1fdc61
FB
1505 if (*p == '\r')
1506 p++;
1507 }
93ced3e8
FB
1508 return 0;
1509}
1510
1511#define SDP_MAX_SIZE 8192
1512
1513static int sdp_read_header(AVFormatContext *s,
1514 AVFormatParameters *ap)
1515{
8b1ab7bf 1516 RTSPState *rt = s->priv_data;
93ced3e8
FB
1517 RTSPStream *rtsp_st;
1518 int size, i, err;
1519 char *content;
1520 char url[1024];
1521
1522 /* read the whole sdp file */
1523 /* XXX: better loading */
1524 content = av_malloc(SDP_MAX_SIZE);
899681cd 1525 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1526 if (size <= 0) {
1527 av_free(content);
1528 return AVERROR_INVALIDDATA;
1529 }
1530 content[size] ='\0';
1531
1532 sdp_parse(s, content);
1533 av_free(content);
1534
1535 /* open each RTP stream */
8b1ab7bf
FB
1536 for(i=0;i<rt->nb_rtsp_streams;i++) {
1537 rtsp_st = rt->rtsp_streams[i];
115329f1 1538
d2bf42be 1539 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1540 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1541 rtsp_st->sdp_port,
d2bf42be 1542 rtsp_st->sdp_port,
93ced3e8 1543 rtsp_st->sdp_ttl);
dbf30963 1544 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1545 err = AVERROR_INVALIDDATA;
1546 goto fail;
1547 }
ee0cb67f 1548 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1549 goto fail;
93ced3e8
FB
1550 }
1551 return 0;
1552 fail:
8b1ab7bf 1553 rtsp_close_streams(rt);
93ced3e8
FB
1554 return err;
1555}
1556
1557static int sdp_read_packet(AVFormatContext *s,
1558 AVPacket *pkt)
1559{
8b1ab7bf 1560 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1561}
1562
1563static int sdp_read_close(AVFormatContext *s)
1564{
8b1ab7bf
FB
1565 RTSPState *rt = s->priv_data;
1566 rtsp_close_streams(rt);
93ced3e8
FB
1567 return 0;
1568}
1569
ff70e601
MR
1570#ifdef CONFIG_SDP_DEMUXER
1571AVInputFormat sdp_demuxer = {
93ced3e8 1572 "sdp",
bde15e74 1573 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1574 sizeof(RTSPState),
1575 sdp_probe,
1576 sdp_read_header,
1577 sdp_read_packet,
1578 sdp_read_close,
1579};
ff70e601 1580#endif
93ced3e8 1581
e7047005 1582#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1583/* dummy redirector format (used directly in av_open_input_file now) */
1584static int redir_probe(AVProbeData *pd)
1585{
1586 const char *p;
1587 p = pd->buf;
1588 while (redir_isspace(*p))
1589 p++;
f7d78f36
MR
1590 if (av_strstart(p, "http://", NULL) ||
1591 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1592 return AVPROBE_SCORE_MAX;
1593 return 0;
1594}
1595
e8acf0ed 1596static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1597{
1598 char buf[4096], *q;
1599 int c;
1600 AVFormatContext *ic = NULL;
e8acf0ed 1601 ByteIOContext *f = s->pb;
1617ad97
FB
1602
1603 /* parse each URL and try to open it */
1604 c = url_fgetc(f);
1605 while (c != URL_EOF) {
1606 /* skip spaces */
1607 for(;;) {
1608 if (!redir_isspace(c))
1609 break;
1610 c = url_fgetc(f);
1611 }
1612 if (c == URL_EOF)
1613 break;
1614 /* record url */
1615 q = buf;
1616 for(;;) {
1617 if (c == URL_EOF || redir_isspace(c))
1618 break;
1619 if ((q - buf) < sizeof(buf) - 1)
1620 *q++ = c;
1621 c = url_fgetc(f);
1622 }
1623 *q = '\0';
1624 //printf("URL='%s'\n", buf);
1625 /* try to open the media file */
1626 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1627 break;
1628 }
1617ad97 1629 if (!ic)
6f3e0b21 1630 return AVERROR(EIO);
e8acf0ed
LA
1631
1632 *s = *ic;
1633 url_fclose(f);
1634
1635 return 0;
1617ad97
FB
1636}
1637
d2a067d1 1638AVInputFormat redir_demuxer = {
1617ad97 1639 "redir",
bde15e74 1640 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1641 0,
1642 redir_probe,
e8acf0ed 1643 redir_read_header,
1617ad97
FB
1644 NULL,
1645 NULL,
1646};
e7047005 1647#endif