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[libav.git] / libavformat / rtsp.c
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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
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20 */
21#include "avformat.h"
22
db0ed93e 23#include <sys/time.h>
438fcb75 24#include <unistd.h> /* for select() prototype */
42572ef5 25#include "network.h"
75e61b0e 26#include "avstring.h"
c971ff19 27#include "rtsp.h"
1617ad97 28
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29#include "rtp_internal.h"
30
1617ad97 31//#define DEBUG
b6892136 32//#define DEBUG_RTP_TCP
1617ad97 33
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34enum RTSPClientState {
35 RTSP_STATE_IDLE,
36 RTSP_STATE_PLAYING,
37 RTSP_STATE_PAUSED,
38};
39
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40typedef struct RTSPState {
41 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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42 int nb_rtsp_streams;
43 struct RTSPStream **rtsp_streams;
115329f1 44
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45 enum RTSPClientState state;
46 int64_t seek_timestamp;
115329f1 47
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48 /* XXX: currently we use unbuffered input */
49 // ByteIOContext rtsp_gb;
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50 int seq; /* RTSP command sequence number */
51 char session_id[512];
52 enum RTSPProtocol protocol;
53 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 54 RTPDemuxContext *cur_rtp;
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55} RTSPState;
56
57typedef struct RTSPStream {
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58 URLContext *rtp_handle; /* RTP stream handle */
59 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 60
8b1ab7bf 61 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 62 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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63 char control_url[1024]; /* url for this stream (from SDP) */
64
65 int sdp_port; /* port (from SDP content - not used in RTSP) */
66 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
67 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
68 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 69 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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70
71 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
72 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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73} RTSPStream;
74
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75static int rtsp_read_play(AVFormatContext *s);
76
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77/* XXX: currently, the only way to change the protocols consists in
78 changing this variable */
1617ad97 79
c482500f 80#if LIBAVFORMAT_VERSION_INT < (53 << 16)
d1ccf0e0 81int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
c482500f 82#endif
85fb7b34 83
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84static int rtsp_probe(AVProbeData *p)
85{
f7d78f36 86 if (av_strstart(p->filename, "rtsp:", NULL))
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87 return AVPROBE_SCORE_MAX;
88 return 0;
89}
90
91static int redir_isspace(int c)
92{
93 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
94}
95
96static void skip_spaces(const char **pp)
97{
98 const char *p;
99 p = *pp;
100 while (redir_isspace(*p))
101 p++;
102 *pp = p;
103}
104
115329f1 105static void get_word_sep(char *buf, int buf_size, const char *sep,
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106 const char **pp)
107{
108 const char *p;
109 char *q;
110
111 p = *pp;
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112 if (*p == '/')
113 p++;
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114 skip_spaces(&p);
115 q = buf;
116 while (!strchr(sep, *p) && *p != '\0') {
117 if ((q - buf) < buf_size - 1)
118 *q++ = *p;
119 p++;
120 }
121 if (buf_size > 0)
122 *q = '\0';
123 *pp = p;
124}
125
126static void get_word(char *buf, int buf_size, const char **pp)
127{
128 const char *p;
129 char *q;
130
131 p = *pp;
132 skip_spaces(&p);
133 q = buf;
134 while (!redir_isspace(*p) && *p != '\0') {
135 if ((q - buf) < buf_size - 1)
136 *q++ = *p;
137 p++;
138 }
139 if (buf_size > 0)
140 *q = '\0';
141 *pp = p;
142}
143
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144/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
145 params>] */
4934884a 146static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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147{
148 char buf[256];
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149 int i;
150 AVCodec *c;
7b49ce2e 151 const char *c_name;
93ced3e8 152
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153 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
154 see if we can handle this kind of payload */
93ced3e8 155 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 156 if (payload_type >= RTP_PT_PRIVATE) {
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157 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
158 while(handler) {
159 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
160 codec->codec_id = handler->codec_id;
161 rtsp_st->dynamic_handler= handler;
162 if(handler->open) {
163 rtsp_st->dynamic_protocol_context= handler->open();
164 }
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165 break;
166 }
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167 handler= handler->next;
168 }
93ced3e8 169 } else {
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170 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
171 /* search into AVRtpPayloadTypes[] */
7ed19d7f 172 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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173 }
174
175 c = avcodec_find_decoder(codec->codec_id);
176 if (c && c->name)
7b49ce2e 177 c_name = c->name;
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178 else
179 c_name = (char *)NULL;
180
181 if (c_name) {
182 get_word_sep(buf, sizeof(buf), "/", &p);
183 i = atoi(buf);
184 switch (codec->codec_type) {
185 case CODEC_TYPE_AUDIO:
186 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
187 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
188 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
189 if (i > 0) {
190 codec->sample_rate = i;
191 get_word_sep(buf, sizeof(buf), "/", &p);
192 i = atoi(buf);
193 if (i > 0)
194 codec->channels = i;
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195 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
196 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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197 }
198 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
199 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
200 break;
201 case CODEC_TYPE_VIDEO:
202 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
203 break;
204 default:
205 break;
206 }
207 return 0;
93ced3e8 208 }
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209
210 return -1;
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211}
212
213/* return the length and optionnaly the data */
214static int hex_to_data(uint8_t *data, const char *p)
215{
216 int c, len, v;
217
218 len = 0;
219 v = 1;
220 for(;;) {
221 skip_spaces(&p);
222 if (p == '\0')
223 break;
224 c = toupper((unsigned char)*p++);
225 if (c >= '0' && c <= '9')
226 c = c - '0';
227 else if (c >= 'A' && c <= 'F')
228 c = c - 'A' + 10;
229 else
230 break;
231 v = (v << 4) | c;
232 if (v & 0x100) {
233 if (data)
234 data[len] = v;
235 len++;
236 v = 1;
237 }
238 }
239 return len;
240}
241
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242static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
243{
244 switch (codec->codec_id) {
245 case CODEC_ID_MPEG4:
cbee7a69 246 case CODEC_ID_AAC:
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247 if (!strcmp(attr, "config")) {
248 /* decode the hexa encoded parameter */
249 int len = hex_to_data(NULL, value);
250 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
251 if (!codec->extradata)
252 return;
253 codec->extradata_size = len;
254 hex_to_data(codec->extradata, value);
255 }
256 break;
257 default:
258 break;
259 }
260 return;
261}
262
263typedef struct attrname_map
264{
7b49ce2e 265 const char *str;
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266 uint16_t type;
267 uint32_t offset;
268} attrname_map_t;
269
270/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
271#define ATTR_NAME_TYPE_INT 0
272#define ATTR_NAME_TYPE_STR 1
273static attrname_map_t attr_names[]=
274{
275 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
276 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
277 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
278 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
279 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
280 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
281 {NULL, -1, -1},
282};
283
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284/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
285* because it is used in rtp_h264.c, which is forthcoming.
286*/
287int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
288{
289 skip_spaces(p);
290 if(**p)
291 {
292 get_word_sep(attr, attr_size, "=", p);
293 if (**p == '=')
294 (*p)++;
295 get_word_sep(value, value_size, ";", p);
296 if (**p == ';')
297 (*p)++;
298 return 1;
299 }
300 return 0;
301}
302
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303/* parse a SDP line and save stream attributes */
304static void sdp_parse_fmtp(AVStream *st, const char *p)
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305{
306 char attr[256];
307 char value[4096];
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308 int i;
309
310 RTSPStream *rtsp_st = st->priv_data;
01f4895c 311 AVCodecContext *codec = st->codec;
d1ccf0e0 312 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
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313
314 /* loop on each attribute */
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315 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
316 {
bb270c08 317 /* grab the codec extra_data from the config parameter of the fmtp line */
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318 sdp_parse_fmtp_config(codec, attr, value);
319 /* Looking for a known attribute */
320 for (i = 0; attr_names[i].str; ++i) {
321 if (!strcasecmp(attr, attr_names[i].str)) {
322 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
323 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
324 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
325 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 326 }
93ced3e8 327 }
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328 }
329}
330
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331/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
332 * and end time.
333 * Used for seeking in the rtp stream.
334 */
335static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
336{
337 char buf[256];
338
339 skip_spaces(&p);
f7d78f36 340 if (!av_stristart(p, "npt=", &p))
31693e00
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341 return;
342
343 *start = AV_NOPTS_VALUE;
344 *end = AV_NOPTS_VALUE;
345
346 get_word_sep(buf, sizeof(buf), "-", &p);
347 *start = parse_date(buf, 1);
348 if (*p == '-') {
349 p++;
350 get_word_sep(buf, sizeof(buf), "-", &p);
351 *end = parse_date(buf, 1);
352 }
353// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
354// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
355}
356
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357typedef struct SDPParseState {
358 /* SDP only */
359 struct in_addr default_ip;
360 int default_ttl;
361} SDPParseState;
362
363static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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364 int letter, const char *buf)
365{
8b1ab7bf 366 RTSPState *rt = s->priv_data;
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367 char buf1[64], st_type[64];
368 const char *p;
93ced3e8 369 int codec_type, payload_type, i;
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370 AVStream *st;
371 RTSPStream *rtsp_st;
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372 struct in_addr sdp_ip;
373 int ttl;
374
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375#ifdef DEBUG
376 printf("sdp: %c='%s'\n", letter, buf);
377#endif
378
379 p = buf;
380 switch(letter) {
93ced3e8
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381 case 'c':
382 get_word(buf1, sizeof(buf1), &p);
383 if (strcmp(buf1, "IN") != 0)
384 return;
385 get_word(buf1, sizeof(buf1), &p);
386 if (strcmp(buf1, "IP4") != 0)
387 return;
388 get_word_sep(buf1, sizeof(buf1), "/", &p);
389 if (inet_aton(buf1, &sdp_ip) == 0)
390 return;
391 ttl = 16;
392 if (*p == '/') {
393 p++;
394 get_word_sep(buf1, sizeof(buf1), "/", &p);
395 ttl = atoi(buf1);
396 }
397 if (s->nb_streams == 0) {
398 s1->default_ip = sdp_ip;
399 s1->default_ttl = ttl;
400 } else {
401 st = s->streams[s->nb_streams - 1];
402 rtsp_st = st->priv_data;
403 rtsp_st->sdp_ip = sdp_ip;
404 rtsp_st->sdp_ttl = ttl;
405 }
406 break;
1617ad97 407 case 's':
75e61b0e 408 av_strlcpy(s->title, p, sizeof(s->title));
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409 break;
410 case 'i':
411 if (s->nb_streams == 0) {
75e61b0e 412 av_strlcpy(s->comment, p, sizeof(s->comment));
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413 break;
414 }
415 break;
416 case 'm':
417 /* new stream */
418 get_word(st_type, sizeof(st_type), &p);
419 if (!strcmp(st_type, "audio")) {
420 codec_type = CODEC_TYPE_AUDIO;
421 } else if (!strcmp(st_type, "video")) {
422 codec_type = CODEC_TYPE_VIDEO;
423 } else {
424 return;
425 }
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426 rtsp_st = av_mallocz(sizeof(RTSPStream));
427 if (!rtsp_st)
428 return;
8b1ab7bf
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429 rtsp_st->stream_index = -1;
430 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
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431
432 rtsp_st->sdp_ip = s1->default_ip;
433 rtsp_st->sdp_ttl = s1->default_ttl;
434
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435 get_word(buf1, sizeof(buf1), &p); /* port */
436 rtsp_st->sdp_port = atoi(buf1);
437
438 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 439
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440 /* XXX: handle list of formats */
441 get_word(buf1, sizeof(buf1), &p); /* format list */
442 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 443
7ed19d7f 444 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
445 /* no corresponding stream */
446 } else {
447 st = av_new_stream(s, 0);
448 if (!st)
449 return;
450 st->priv_data = rtsp_st;
451 rtsp_st->stream_index = st->index;
01f4895c 452 st->codec->codec_type = codec_type;
d1ccf0e0 453 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 454 /* if standard payload type, we can find the codec right now */
01f4895c 455 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
456 }
457 }
1617ad97 458 /* put a default control url */
75e61b0e 459 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
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460 break;
461 case 'a':
f7d78f36 462 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
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463 char proto[32];
464 /* get the control url */
465 st = s->streams[s->nb_streams - 1];
466 rtsp_st = st->priv_data;
115329f1 467
1617ad97 468 /* XXX: may need to add full url resolution */
6ba5cbc6 469 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
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470 if (proto[0] == '\0') {
471 /* relative control URL */
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MR
472 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
473 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 474 } else {
75e61b0e 475 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 476 }
f7d78f36 477 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 478 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 479 get_word(buf1, sizeof(buf1), &p);
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480 payload_type = atoi(buf1);
481 for(i = 0; i < s->nb_streams;i++) {
482 st = s->streams[i];
483 rtsp_st = st->priv_data;
484 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 485 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
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486 }
487 }
f7d78f36 488 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 489 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 490 get_word(buf1, sizeof(buf1), &p);
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491 payload_type = atoi(buf1);
492 for(i = 0; i < s->nb_streams;i++) {
493 st = s->streams[i];
494 rtsp_st = st->priv_data;
495 if (rtsp_st->sdp_payload_type == payload_type) {
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RM
496 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
497 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
498 sdp_parse_fmtp(st, p);
499 }
500 } else {
ed787542 501 sdp_parse_fmtp(st, p);
4934884a 502 }
93ced3e8
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503 }
504 }
f7d78f36 505 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
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506 // let dynamic protocol handlers have a stab at the line.
507 get_word(buf1, sizeof(buf1), &p);
508 payload_type = atoi(buf1);
509 for(i = 0; i < s->nb_streams;i++) {
510 st = s->streams[i];
511 rtsp_st = st->priv_data;
512 if (rtsp_st->sdp_payload_type == payload_type) {
513 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
514 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
515 }
516 }
517 }
f7d78f36 518 } else if(av_strstart(p, "range:", &p)) {
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519 int64_t start, end;
520
521 // this is so that seeking on a streamed file can work.
522 rtsp_parse_range_npt(p, &start, &end);
523 s->start_time= start;
524 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
1617ad97
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525 }
526 break;
527 }
528}
529
5c91a675 530static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
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531{
532 const char *p;
533 int letter;
534 char buf[1024], *q;
93ced3e8 535 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 536
93ced3e8 537 memset(s1, 0, sizeof(SDPParseState));
1617ad97
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538 p = content;
539 for(;;) {
540 skip_spaces(&p);
541 letter = *p;
542 if (letter == '\0')
543 break;
544 p++;
545 if (*p != '=')
546 goto next_line;
547 p++;
548 /* get the content */
549 q = buf;
b6892136 550 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
551 if ((q - buf) < sizeof(buf) - 1)
552 *q++ = *p;
553 p++;
554 }
555 *q = '\0';
93ced3e8 556 sdp_parse_line(s, s1, letter, buf);
1617ad97
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557 next_line:
558 while (*p != '\n' && *p != '\0')
559 p++;
560 if (*p == '\n')
561 p++;
562 }
563 return 0;
564}
565
566static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
567{
568 const char *p;
569 int v;
570
571 p = *pp;
572 skip_spaces(&p);
573 v = strtol(p, (char **)&p, 10);
574 if (*p == '-') {
575 p++;
576 *min_ptr = v;
577 v = strtol(p, (char **)&p, 10);
578 *max_ptr = v;
579 } else {
580 *min_ptr = v;
581 *max_ptr = v;
582 }
583 *pp = p;
584}
585
586/* XXX: only one transport specification is parsed */
587static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
588{
589 char transport_protocol[16];
590 char profile[16];
591 char lower_transport[16];
592 char parameter[16];
593 RTSPTransportField *th;
594 char buf[256];
115329f1 595
1617ad97 596 reply->nb_transports = 0;
115329f1 597
1617ad97
FB
598 for(;;) {
599 skip_spaces(&p);
600 if (*p == '\0')
601 break;
602
603 th = &reply->transports[reply->nb_transports];
604
115329f1 605 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
606 "/", &p);
607 if (*p == '/')
608 p++;
e1502118 609 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
610 get_word_sep(profile, sizeof(profile), "/;,", &p);
611 lower_transport[0] = '\0';
612 /* rtp/avp/<protocol> */
613 if (*p == '/') {
614 p++;
615 get_word_sep(lower_transport, sizeof(lower_transport),
616 ";,", &p);
617 }
618 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
619 /* x-pn-tng/<protocol> */
e1502118
LB
620 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
621 profile[0] = '\0';
1617ad97 622 }
b6892136 623 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
624 th->protocol = RTSP_PROTOCOL_RTP_TCP;
625 else
626 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 627
1617ad97
FB
628 if (*p == ';')
629 p++;
630 /* get each parameter */
631 while (*p != '\0' && *p != ',') {
632 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
633 if (!strcmp(parameter, "port")) {
634 if (*p == '=') {
635 p++;
636 rtsp_parse_range(&th->port_min, &th->port_max, &p);
637 }
638 } else if (!strcmp(parameter, "client_port")) {
639 if (*p == '=') {
640 p++;
115329f1 641 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
642 &th->client_port_max, &p);
643 }
644 } else if (!strcmp(parameter, "server_port")) {
645 if (*p == '=') {
646 p++;
115329f1 647 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
648 &th->server_port_max, &p);
649 }
650 } else if (!strcmp(parameter, "interleaved")) {
651 if (*p == '=') {
652 p++;
115329f1 653 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
654 &th->interleaved_max, &p);
655 }
656 } else if (!strcmp(parameter, "multicast")) {
657 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
658 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
659 } else if (!strcmp(parameter, "ttl")) {
660 if (*p == '=') {
661 p++;
662 th->ttl = strtol(p, (char **)&p, 10);
663 }
664 } else if (!strcmp(parameter, "destination")) {
665 struct in_addr ipaddr;
666
667 if (*p == '=') {
668 p++;
669 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 670 if (inet_aton(buf, &ipaddr))
1617ad97
FB
671 th->destination = ntohl(ipaddr.s_addr);
672 }
673 }
674 while (*p != ';' && *p != '\0' && *p != ',')
675 p++;
676 if (*p == ';')
677 p++;
678 }
679 if (*p == ',')
680 p++;
681
682 reply->nb_transports++;
683 }
684}
685
686void rtsp_parse_line(RTSPHeader *reply, const char *buf)
687{
688 const char *p;
689
690 /* NOTE: we do case independent match for broken servers */
691 p = buf;
f7d78f36 692 if (av_stristart(p, "Session:", &p)) {
1617ad97 693 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 694 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 695 reply->content_length = strtol(p, NULL, 10);
f7d78f36 696 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 697 rtsp_parse_transport(reply, p);
f7d78f36 698 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 699 reply->seq = strtol(p, NULL, 10);
f7d78f36 700 } else if (av_stristart(p, "Range:", &p)) {
31693e00 701 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1617ad97
FB
702 }
703}
704
2a42b5c3
LS
705static int url_readbuf(URLContext *h, unsigned char *buf, int size)
706{
707 int ret, len;
708
709 len = 0;
710 while (len < size) {
711 ret = url_read(h, buf+len, size-len);
712 if (ret < 1)
713 return ret;
714 len += ret;
715 }
716 return len;
717}
718
b7b8fc34
FB
719/* skip a RTP/TCP interleaved packet */
720static void rtsp_skip_packet(AVFormatContext *s)
721{
722 RTSPState *rt = s->priv_data;
723 int ret, len, len1;
724 uint8_t buf[1024];
725
2a42b5c3 726 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
727 if (ret != 3)
728 return;
80fb8234 729 len = AV_RB16(buf + 1);
b7b8fc34
FB
730#ifdef DEBUG
731 printf("skipping RTP packet len=%d\n", len);
732#endif
733 /* skip payload */
734 while (len > 0) {
735 len1 = len;
736 if (len1 > sizeof(buf))
737 len1 = sizeof(buf);
2a42b5c3 738 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
739 if (ret != len1)
740 return;
741 len -= len1;
742 }
743}
1617ad97 744
115329f1
DB
745static void rtsp_send_cmd(AVFormatContext *s,
746 const char *cmd, RTSPHeader *reply,
1617ad97
FB
747 unsigned char **content_ptr)
748{
749 RTSPState *rt = s->priv_data;
750 char buf[4096], buf1[1024], *q;
751 unsigned char ch;
752 const char *p;
753 int content_length, line_count;
754 unsigned char *content = NULL;
755
756 memset(reply, 0, sizeof(RTSPHeader));
757
758 rt->seq++;
75e61b0e 759 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 760 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 761 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 762 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 763 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 764 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 765 }
75e61b0e 766 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
767#ifdef DEBUG
768 printf("Sending:\n%s--\n", buf);
769#endif
770 url_write(rt->rtsp_hd, buf, strlen(buf));
771
772 /* parse reply (XXX: use buffers) */
773 line_count = 0;
774 rt->last_reply[0] = '\0';
775 for(;;) {
776 q = buf;
777 for(;;) {
2a42b5c3 778 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
779 break;
780 if (ch == '\n')
781 break;
b7b8fc34
FB
782 if (ch == '$') {
783 /* XXX: only parse it if first char on line ? */
784 rtsp_skip_packet(s);
785 } else if (ch != '\r') {
1617ad97
FB
786 if ((q - buf) < sizeof(buf) - 1)
787 *q++ = ch;
788 }
789 }
790 *q = '\0';
791#ifdef DEBUG
792 printf("line='%s'\n", buf);
793#endif
794 /* test if last line */
795 if (buf[0] == '\0')
796 break;
797 p = buf;
798 if (line_count == 0) {
799 /* get reply code */
800 get_word(buf1, sizeof(buf1), &p);
801 get_word(buf1, sizeof(buf1), &p);
802 reply->status_code = atoi(buf1);
803 } else {
804 rtsp_parse_line(reply, p);
75e61b0e
MR
805 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
806 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
807 }
808 line_count++;
809 }
115329f1 810
1617ad97 811 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 812 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 813
1617ad97
FB
814 content_length = reply->content_length;
815 if (content_length > 0) {
816 /* leave some room for a trailing '\0' (useful for simple parsing) */
817 content = av_malloc(content_length + 1);
2a42b5c3 818 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
819 content[content_length] = '\0';
820 }
821 if (content_ptr)
822 *content_ptr = content;
e2e2e7dd
AB
823 else
824 av_free(content);
1617ad97
FB
825}
826
1617ad97 827
8b1ab7bf
FB
828/* close and free RTSP streams */
829static void rtsp_close_streams(RTSPState *rt)
830{
831 int i;
832 RTSPStream *rtsp_st;
833
834 for(i=0;i<rt->nb_rtsp_streams;i++) {
835 rtsp_st = rt->rtsp_streams[i];
836 if (rtsp_st) {
837 if (rtsp_st->rtp_ctx)
838 rtp_parse_close(rtsp_st->rtp_ctx);
839 if (rtsp_st->rtp_handle)
840 url_close(rtsp_st->rtp_handle);
4934884a
RM
841 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
842 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf
FB
843 }
844 av_free(rtsp_st);
845 }
846 av_free(rt->rtsp_streams);
847}
848
53620bba
RB
849/**
850 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
851 */
852static int
853make_setup_request (AVFormatContext *s, const char *host, int port, int protocol_mask)
1617ad97
FB
854{
855 RTSPState *rt = s->priv_data;
53620bba 856 int j, i, err;
1617ad97 857 RTSPStream *rtsp_st;
8b1ab7bf 858 AVStream *st;
53620bba
RB
859 RTSPHeader reply1, *reply = &reply1;
860 char cmd[2048];
115329f1 861
1617ad97
FB
862 /* for each stream, make the setup request */
863 /* XXX: we assume the same server is used for the control of each
864 RTSP stream */
d1ccf0e0
RD
865
866 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
867 char transport[2048];
868
8b1ab7bf 869 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
870
871 /* compute available transports */
872 transport[0] = '\0';
873
874 /* RTP/UDP */
875 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
85fb7b34 876 char buf[256];
85fb7b34
FB
877
878 /* first try in specified port range */
d1ccf0e0
RD
879 if (RTSP_RTP_PORT_MIN != 0) {
880 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 881 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 882 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 883 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 884 goto rtp_opened;
d1ccf0e0 885 }
85fb7b34 886 }
1617ad97 887 }
85fb7b34 888
d1ccf0e0
RD
889/* then try on any port
890** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
891** err = AVERROR_INVALIDDATA;
892** goto fail;
893** }
894*/
85fb7b34
FB
895
896 rtp_opened:
8b1ab7bf 897 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97 898 if (transport[0] != '\0')
75e61b0e 899 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
900 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
901 "RTP/AVP/UDP;unicast;client_port=%d-%d",
902 port, port + 1);
903 }
904
905 /* RTP/TCP */
d1ccf0e0 906 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
1617ad97 907 if (transport[0] != '\0')
75e61b0e 908 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
909 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
910 "RTP/AVP/TCP");
911 }
912
d1ccf0e0 913 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
1617ad97 914 if (transport[0] != '\0')
75e61b0e 915 av_strlcat(transport, ",", sizeof(transport));
115329f1 916 snprintf(transport + strlen(transport),
1617ad97
FB
917 sizeof(transport) - strlen(transport) - 1,
918 "RTP/AVP/UDP;multicast");
919 }
115329f1 920 snprintf(cmd, sizeof(cmd),
b6892136
FB
921 "SETUP %s RTSP/1.0\r\n"
922 "Transport: %s\r\n",
1617ad97
FB
923 rtsp_st->control_url, transport);
924 rtsp_send_cmd(s, cmd, reply, NULL);
925 if (reply->status_code != RTSP_STATUS_OK ||
926 reply->nb_transports != 1) {
927 err = AVERROR_INVALIDDATA;
928 goto fail;
929 }
930
931 /* XXX: same protocol for all streams is required */
932 if (i > 0) {
933 if (reply->transports[0].protocol != rt->protocol) {
934 err = AVERROR_INVALIDDATA;
935 goto fail;
936 }
937 } else {
938 rt->protocol = reply->transports[0].protocol;
939 }
940
941 /* close RTP connection if not choosen */
942 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
943 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
8b1ab7bf
FB
944 url_close(rtsp_st->rtp_handle);
945 rtsp_st->rtp_handle = NULL;
1617ad97
FB
946 }
947
948 switch(reply->transports[0].protocol) {
949 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
950 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
951 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
952 break;
115329f1 953
1617ad97
FB
954 case RTSP_PROTOCOL_RTP_UDP:
955 {
956 char url[1024];
115329f1 957
1617ad97 958 /* XXX: also use address if specified */
115329f1 959 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 960 host, reply->transports[0].server_port_min);
8b1ab7bf 961 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
962 err = AVERROR_INVALIDDATA;
963 goto fail;
964 }
965 }
966 break;
967 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
968 {
969 char url[1024];
d02678ec 970 struct in_addr in;
1617ad97 971
d02678ec 972 in.s_addr = htonl(reply->transports[0].destination);
115329f1 973 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
d02678ec
LB
974 inet_ntoa(in),
975 reply->transports[0].port_min,
976 reply->transports[0].ttl);
dbf30963 977 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
978 err = AVERROR_INVALIDDATA;
979 goto fail;
980 }
981 }
982 break;
983 }
8b1ab7bf
FB
984 /* open the RTP context */
985 st = NULL;
986 if (rtsp_st->stream_index >= 0)
987 st = s->streams[rtsp_st->stream_index];
988 if (!st)
989 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 990 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
d1ccf0e0 991
8b1ab7bf 992 if (!rtsp_st->rtp_ctx) {
769e10f0 993 err = AVERROR(ENOMEM);
8b1ab7bf 994 goto fail;
4934884a
RM
995 } else {
996 if(rtsp_st->dynamic_handler) {
997 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
998 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
999 }
8b1ab7bf 1000 }
1617ad97
FB
1001 }
1002
53620bba
RB
1003 return 0;
1004
1005fail:
1006 return err;
1007}
1008
1009static int rtsp_read_header(AVFormatContext *s,
1010 AVFormatParameters *ap)
1011{
1012 RTSPState *rt = s->priv_data;
1013 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1014 URLContext *rtsp_hd;
1015 int port, ret, err;
1016 RTSPHeader reply1, *reply = &reply1;
1017 unsigned char *content = NULL;
1018 int protocol_mask = 0;
1019
1020 /* extract hostname and port */
1021 url_split(NULL, 0, NULL, 0,
1022 host, sizeof(host), &port, path, sizeof(path), s->filename);
1023 if (port < 0)
1024 port = RTSP_DEFAULT_PORT;
1025
1026 /* search for options */
1027 option_list = strchr(path, '?');
1028 if (option_list) {
1029 /* remove the options from the path */
1030 *option_list++ = 0;
1031 while(option_list) {
1032 /* move the option pointer */
1033 option = option_list;
1034 option_list = strchr(option_list, '&');
1035 if (option_list)
1036 *(option_list++) = 0;
1037 /* handle the options */
1038 if (strcmp(option, "udp") == 0)
1039 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1040 else if (strcmp(option, "multicast") == 0)
1041 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1042 else if (strcmp(option, "tcp") == 0)
1043 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1044 }
1045 }
1046
1047 if (!protocol_mask)
1048 protocol_mask = rtsp_default_protocols;
1049
1050 /* open the tcp connexion */
1051 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1052 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1053 return AVERROR(EIO);
1054 rt->rtsp_hd = rtsp_hd;
1055 rt->seq = 0;
1056
1057 /* describe the stream */
1058 snprintf(cmd, sizeof(cmd),
1059 "DESCRIBE %s RTSP/1.0\r\n"
1060 "Accept: application/sdp\r\n",
1061 s->filename);
1062 rtsp_send_cmd(s, cmd, reply, &content);
1063 if (!content) {
1064 err = AVERROR_INVALIDDATA;
1065 goto fail;
1066 }
1067 if (reply->status_code != RTSP_STATUS_OK) {
1068 err = AVERROR_INVALIDDATA;
1069 goto fail;
1070 }
1071
1072 /* now we got the SDP description, we parse it */
1073 ret = sdp_parse(s, (const char *)content);
1074 av_freep(&content);
1075 if (ret < 0) {
1076 err = AVERROR_INVALIDDATA;
1077 goto fail;
1078 }
1079
1080 err = make_setup_request(s, host, port, protocol_mask);
1081 if (err)
1082 goto fail;
1083
ff762d6e
FB
1084 rt->state = RTSP_STATE_IDLE;
1085 rt->seek_timestamp = 0; /* default is to start stream at position
1086 zero */
c04c3282 1087 if (ap->initial_pause) {
ff762d6e
FB
1088 /* do not start immediately */
1089 } else {
1090 if (rtsp_read_play(s) < 0) {
1091 err = AVERROR_INVALIDDATA;
1617ad97
FB
1092 goto fail;
1093 }
1094 }
1617ad97
FB
1095 return 0;
1096 fail:
8b1ab7bf 1097 rtsp_close_streams(rt);
1617ad97
FB
1098 av_freep(&content);
1099 url_close(rt->rtsp_hd);
1100 return err;
1101}
1102
8b1ab7bf
FB
1103static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1104 uint8_t *buf, int buf_size)
1617ad97
FB
1105{
1106 RTSPState *rt = s->priv_data;
b6892136 1107 int id, len, i, ret;
1617ad97 1108 RTSPStream *rtsp_st;
1617ad97 1109
b6892136
FB
1110#ifdef DEBUG_RTP_TCP
1111 printf("tcp_read_packet:\n");
1112#endif
1617ad97
FB
1113 redo:
1114 for(;;) {
2a42b5c3 1115 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1116#ifdef DEBUG_RTP_TCP
1117 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1118#endif
1119 if (ret != 1)
8b1ab7bf 1120 return -1;
b6892136 1121 if (buf[0] == '$')
1617ad97
FB
1122 break;
1123 }
2a42b5c3 1124 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1125 if (ret != 3)
8b1ab7bf 1126 return -1;
b6892136 1127 id = buf[0];
80fb8234 1128 len = AV_RB16(buf + 1);
b6892136
FB
1129#ifdef DEBUG_RTP_TCP
1130 printf("id=%d len=%d\n", id, len);
1131#endif
8b1ab7bf 1132 if (len > buf_size || len < 12)
1617ad97
FB
1133 goto redo;
1134 /* get the data */
2a42b5c3 1135 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1136 if (ret != len)
8b1ab7bf 1137 return -1;
115329f1 1138
1617ad97 1139 /* find the matching stream */
8b1ab7bf
FB
1140 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1141 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1142 if (id >= rtsp_st->interleaved_min &&
1143 id <= rtsp_st->interleaved_max)
1617ad97
FB
1144 goto found;
1145 }
1146 goto redo;
1147 found:
8b1ab7bf
FB
1148 *prtsp_st = rtsp_st;
1149 return len;
1617ad97
FB
1150}
1151
115329f1 1152static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1153 uint8_t *buf, int buf_size)
1617ad97 1154{
8b1ab7bf 1155 RTSPState *rt = s->priv_data;
1617ad97
FB
1156 RTSPStream *rtsp_st;
1157 fd_set rfds;
1158 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1159 struct timeval tv;
1160
1161 for(;;) {
b7b8fc34 1162 if (url_interrupt_cb())
a960a1e0 1163 return AVERROR(EINTR);
1617ad97
FB
1164 FD_ZERO(&rfds);
1165 fd_max = -1;
8b1ab7bf
FB
1166 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1167 rtsp_st = rt->rtsp_streams[i];
1617ad97 1168 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1169 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1170 if (fd1 > fd_max)
1171 fd_max = fd1;
1172 FD_SET(fd1, &rfds);
1173 }
1617ad97 1174 tv.tv_sec = 0;
b7b8fc34 1175 tv.tv_usec = 100 * 1000;
1617ad97
FB
1176 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1177 if (n > 0) {
8b1ab7bf
FB
1178 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1179 rtsp_st = rt->rtsp_streams[i];
1180 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1181 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1182 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1183 if (ret > 0) {
1184 *prtsp_st = rtsp_st;
1617ad97
FB
1185 return ret;
1186 }
1187 }
1188 }
1189 }
1190 }
1191}
1192
1193static int rtsp_read_packet(AVFormatContext *s,
1194 AVPacket *pkt)
1195{
1196 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1197 RTSPStream *rtsp_st;
1198 int ret, len;
1199 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1200
1201 /* get next frames from the same RTP packet */
1202 if (rt->cur_rtp) {
1203 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1204 if (ret == 0) {
1205 rt->cur_rtp = NULL;
1206 return 0;
1207 } else if (ret == 1) {
1208 return 0;
1209 } else {
1210 rt->cur_rtp = NULL;
1211 }
1212 }
1617ad97 1213
8b1ab7bf
FB
1214 /* read next RTP packet */
1215 redo:
1617ad97
FB
1216 switch(rt->protocol) {
1217 default:
1218 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1219 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1220 break;
1221 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1222 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1223 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
74ef8b43 1224 if (len >=0 && rtsp_st->rtp_ctx)
dbf30963 1225 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1226 break;
1227 }
8b1ab7bf 1228 if (len < 0)
489b0d4d 1229 return len;
8b1ab7bf
FB
1230 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1231 if (ret < 0)
1232 goto redo;
1233 if (ret == 1) {
1234 /* more packets may follow, so we save the RTP context */
1235 rt->cur_rtp = rtsp_st->rtp_ctx;
1236 }
1237 return 0;
1617ad97
FB
1238}
1239
ff762d6e 1240static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1241{
ff762d6e 1242 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1243 RTSPHeader reply1, *reply = &reply1;
1244 char cmd[1024];
1245
bc874dae 1246 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1247
1248 if (rt->state == RTSP_STATE_PAUSED) {
115329f1 1249 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1250 "PLAY %s RTSP/1.0\r\n",
1251 s->filename);
1252 } else {
115329f1 1253 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1254 "PLAY %s RTSP/1.0\r\n"
1255 "Range: npt=%0.3f-\r\n",
1256 s->filename,
1257 (double)rt->seek_timestamp / AV_TIME_BASE);
1258 }
b7b8fc34
FB
1259 rtsp_send_cmd(s, cmd, reply, NULL);
1260 if (reply->status_code != RTSP_STATUS_OK) {
1261 return -1;
1262 } else {
ff762d6e 1263 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1264 return 0;
1265 }
1266}
1267
ff762d6e
FB
1268/* pause the stream */
1269static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1270{
ff762d6e 1271 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1272 RTSPHeader reply1, *reply = &reply1;
1273 char cmd[1024];
1274
b7b8fc34 1275 rt = s->priv_data;
115329f1 1276
ff762d6e
FB
1277 if (rt->state != RTSP_STATE_PLAYING)
1278 return 0;
1279
115329f1 1280 snprintf(cmd, sizeof(cmd),
ff762d6e 1281 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1282 s->filename);
1283 rtsp_send_cmd(s, cmd, reply, NULL);
1284 if (reply->status_code != RTSP_STATUS_OK) {
1285 return -1;
1286 } else {
ff762d6e 1287 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1288 return 0;
1289 }
1290}
1291
115329f1 1292static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1293 int64_t timestamp, int flags)
ff762d6e
FB
1294{
1295 RTSPState *rt = s->priv_data;
115329f1 1296
50755217 1297 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1298 switch(rt->state) {
1299 default:
1300 case RTSP_STATE_IDLE:
1301 break;
1302 case RTSP_STATE_PLAYING:
1303 if (rtsp_read_play(s) != 0)
1304 return -1;
1305 break;
1306 case RTSP_STATE_PAUSED:
1307 rt->state = RTSP_STATE_IDLE;
1308 break;
1309 }
1310 return 0;
1311}
1312
1617ad97
FB
1313static int rtsp_read_close(AVFormatContext *s)
1314{
1315 RTSPState *rt = s->priv_data;
1617ad97 1316 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1317 char cmd[1024];
1318
b6892136 1319#if 0
1617ad97
FB
1320 /* NOTE: it is valid to flush the buffer here */
1321 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1322 url_fclose(&rt->rtsp_gb);
1323 }
b6892136 1324#endif
115329f1 1325 snprintf(cmd, sizeof(cmd),
b6892136 1326 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1327 s->filename);
1328 rtsp_send_cmd(s, cmd, reply, NULL);
1329
8b1ab7bf 1330 rtsp_close_streams(rt);
1617ad97
FB
1331 url_close(rt->rtsp_hd);
1332 return 0;
1333}
1334
96862926 1335#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1336AVInputFormat rtsp_demuxer = {
1617ad97
FB
1337 "rtsp",
1338 "RTSP input format",
1339 sizeof(RTSPState),
1340 rtsp_probe,
1341 rtsp_read_header,
1342 rtsp_read_packet,
1343 rtsp_read_close,
ff762d6e 1344 rtsp_read_seek,
bb76a117 1345 .flags = AVFMT_NOFILE,
ff762d6e
FB
1346 .read_play = rtsp_read_play,
1347 .read_pause = rtsp_read_pause,
1617ad97 1348};
96862926 1349#endif
1617ad97 1350
cb1fdc61 1351static int sdp_probe(AVProbeData *p1)
93ced3e8 1352{
0e1ceacd 1353 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1354
1355 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1356 while (p < p_end && *p != '\0') {
f7d78f36 1357 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1358 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1359
1360 while(p < p_end - 1 && *p != '\n') p++;
1361 if (++p >= p_end)
cb1fdc61 1362 break;
cb1fdc61
FB
1363 if (*p == '\r')
1364 p++;
1365 }
93ced3e8
FB
1366 return 0;
1367}
1368
1369#define SDP_MAX_SIZE 8192
1370
1371static int sdp_read_header(AVFormatContext *s,
1372 AVFormatParameters *ap)
1373{
8b1ab7bf 1374 RTSPState *rt = s->priv_data;
93ced3e8
FB
1375 RTSPStream *rtsp_st;
1376 int size, i, err;
1377 char *content;
1378 char url[1024];
8b1ab7bf 1379 AVStream *st;
93ced3e8
FB
1380
1381 /* read the whole sdp file */
1382 /* XXX: better loading */
1383 content = av_malloc(SDP_MAX_SIZE);
899681cd 1384 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1385 if (size <= 0) {
1386 av_free(content);
1387 return AVERROR_INVALIDDATA;
1388 }
1389 content[size] ='\0';
1390
1391 sdp_parse(s, content);
1392 av_free(content);
1393
1394 /* open each RTP stream */
8b1ab7bf
FB
1395 for(i=0;i<rt->nb_rtsp_streams;i++) {
1396 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1397
1398 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1399 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8
FB
1400 rtsp_st->sdp_port,
1401 rtsp_st->sdp_ttl);
dbf30963 1402 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1403 err = AVERROR_INVALIDDATA;
1404 goto fail;
1405 }
8b1ab7bf
FB
1406 /* open the RTP context */
1407 st = NULL;
1408 if (rtsp_st->stream_index >= 0)
1409 st = s->streams[rtsp_st->stream_index];
1410 if (!st)
1411 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1412 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
8b1ab7bf 1413 if (!rtsp_st->rtp_ctx) {
769e10f0 1414 err = AVERROR(ENOMEM);
8b1ab7bf 1415 goto fail;
4934884a
RM
1416 } else {
1417 if(rtsp_st->dynamic_handler) {
1418 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1419 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1420 }
8b1ab7bf 1421 }
93ced3e8
FB
1422 }
1423 return 0;
1424 fail:
8b1ab7bf 1425 rtsp_close_streams(rt);
93ced3e8
FB
1426 return err;
1427}
1428
1429static int sdp_read_packet(AVFormatContext *s,
1430 AVPacket *pkt)
1431{
8b1ab7bf 1432 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1433}
1434
1435static int sdp_read_close(AVFormatContext *s)
1436{
8b1ab7bf
FB
1437 RTSPState *rt = s->priv_data;
1438 rtsp_close_streams(rt);
93ced3e8
FB
1439 return 0;
1440}
1441
ff70e601
MR
1442#ifdef CONFIG_SDP_DEMUXER
1443AVInputFormat sdp_demuxer = {
93ced3e8
FB
1444 "sdp",
1445 "SDP",
1446 sizeof(RTSPState),
1447 sdp_probe,
1448 sdp_read_header,
1449 sdp_read_packet,
1450 sdp_read_close,
1451};
ff70e601 1452#endif
93ced3e8 1453
e7047005 1454#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1455/* dummy redirector format (used directly in av_open_input_file now) */
1456static int redir_probe(AVProbeData *pd)
1457{
1458 const char *p;
1459 p = pd->buf;
1460 while (redir_isspace(*p))
1461 p++;
f7d78f36
MR
1462 if (av_strstart(p, "http://", NULL) ||
1463 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1464 return AVPROBE_SCORE_MAX;
1465 return 0;
1466}
1467
e8acf0ed 1468static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1469{
1470 char buf[4096], *q;
1471 int c;
1472 AVFormatContext *ic = NULL;
e8acf0ed 1473 ByteIOContext *f = s->pb;
1617ad97
FB
1474
1475 /* parse each URL and try to open it */
1476 c = url_fgetc(f);
1477 while (c != URL_EOF) {
1478 /* skip spaces */
1479 for(;;) {
1480 if (!redir_isspace(c))
1481 break;
1482 c = url_fgetc(f);
1483 }
1484 if (c == URL_EOF)
1485 break;
1486 /* record url */
1487 q = buf;
1488 for(;;) {
1489 if (c == URL_EOF || redir_isspace(c))
1490 break;
1491 if ((q - buf) < sizeof(buf) - 1)
1492 *q++ = c;
1493 c = url_fgetc(f);
1494 }
1495 *q = '\0';
1496 //printf("URL='%s'\n", buf);
1497 /* try to open the media file */
1498 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1499 break;
1500 }
1617ad97 1501 if (!ic)
6f3e0b21 1502 return AVERROR(EIO);
e8acf0ed
LA
1503
1504 *s = *ic;
1505 url_fclose(f);
1506
1507 return 0;
1617ad97
FB
1508}
1509
d2a067d1 1510AVInputFormat redir_demuxer = {
1617ad97
FB
1511 "redir",
1512 "Redirector format",
1513 0,
1514 redir_probe,
e8acf0ed 1515 redir_read_header,
1617ad97
FB
1516 NULL,
1517 NULL,
1518};
e7047005 1519#endif