import ok'd hunks for mxf muxer
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
1617ad97
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3 * Copyright (c) 2002 Fabrice Bellard.
4 *
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
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21
22#include "libavutil/avstring.h"
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23#include "avformat.h"
24
db0ed93e 25#include <sys/time.h>
438fcb75 26#include <unistd.h> /* for select() prototype */
ea452b54 27#include <strings.h>
42572ef5 28#include "network.h"
c971ff19 29#include "rtsp.h"
1617ad97 30
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31#include "rtp_internal.h"
32
1617ad97 33//#define DEBUG
b6892136 34//#define DEBUG_RTP_TCP
1617ad97 35
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36enum RTSPClientState {
37 RTSP_STATE_IDLE,
38 RTSP_STATE_PLAYING,
39 RTSP_STATE_PAUSED,
40};
41
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42typedef struct RTSPState {
43 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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44 int nb_rtsp_streams;
45 struct RTSPStream **rtsp_streams;
115329f1 46
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47 enum RTSPClientState state;
48 int64_t seek_timestamp;
115329f1 49
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50 /* XXX: currently we use unbuffered input */
51 // ByteIOContext rtsp_gb;
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52 int seq; /* RTSP command sequence number */
53 char session_id[512];
54 enum RTSPProtocol protocol;
55 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 56 RTPDemuxContext *cur_rtp;
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57} RTSPState;
58
59typedef struct RTSPStream {
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60 URLContext *rtp_handle; /* RTP stream handle */
61 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 62
8b1ab7bf 63 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 64 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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65 char control_url[1024]; /* url for this stream (from SDP) */
66
67 int sdp_port; /* port (from SDP content - not used in RTSP) */
68 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
69 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
70 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 71 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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72
73 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
74 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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75} RTSPStream;
76
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77static int rtsp_read_play(AVFormatContext *s);
78
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79/* XXX: currently, the only way to change the protocols consists in
80 changing this variable */
1617ad97 81
c482500f 82#if LIBAVFORMAT_VERSION_INT < (53 << 16)
d1ccf0e0 83int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
c482500f 84#endif
85fb7b34 85
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86static int rtsp_probe(AVProbeData *p)
87{
f7d78f36 88 if (av_strstart(p->filename, "rtsp:", NULL))
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89 return AVPROBE_SCORE_MAX;
90 return 0;
91}
92
93static int redir_isspace(int c)
94{
ccd425e7 95 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
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96}
97
98static void skip_spaces(const char **pp)
99{
100 const char *p;
101 p = *pp;
102 while (redir_isspace(*p))
103 p++;
104 *pp = p;
105}
106
115329f1 107static void get_word_sep(char *buf, int buf_size, const char *sep,
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108 const char **pp)
109{
110 const char *p;
111 char *q;
112
113 p = *pp;
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114 if (*p == '/')
115 p++;
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116 skip_spaces(&p);
117 q = buf;
118 while (!strchr(sep, *p) && *p != '\0') {
119 if ((q - buf) < buf_size - 1)
120 *q++ = *p;
121 p++;
122 }
123 if (buf_size > 0)
124 *q = '\0';
125 *pp = p;
126}
127
128static void get_word(char *buf, int buf_size, const char **pp)
129{
130 const char *p;
131 char *q;
132
133 p = *pp;
134 skip_spaces(&p);
135 q = buf;
136 while (!redir_isspace(*p) && *p != '\0') {
137 if ((q - buf) < buf_size - 1)
138 *q++ = *p;
139 p++;
140 }
141 if (buf_size > 0)
142 *q = '\0';
143 *pp = p;
144}
145
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146/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
147 params>] */
4934884a 148static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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149{
150 char buf[256];
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151 int i;
152 AVCodec *c;
7b49ce2e 153 const char *c_name;
93ced3e8 154
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155 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
156 see if we can handle this kind of payload */
93ced3e8 157 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 158 if (payload_type >= RTP_PT_PRIVATE) {
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159 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
160 while(handler) {
161 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
162 codec->codec_id = handler->codec_id;
163 rtsp_st->dynamic_handler= handler;
164 if(handler->open) {
165 rtsp_st->dynamic_protocol_context= handler->open();
166 }
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167 break;
168 }
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169 handler= handler->next;
170 }
93ced3e8 171 } else {
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172 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
173 /* search into AVRtpPayloadTypes[] */
7ed19d7f 174 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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175 }
176
177 c = avcodec_find_decoder(codec->codec_id);
178 if (c && c->name)
7b49ce2e 179 c_name = c->name;
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180 else
181 c_name = (char *)NULL;
182
183 if (c_name) {
184 get_word_sep(buf, sizeof(buf), "/", &p);
185 i = atoi(buf);
186 switch (codec->codec_type) {
187 case CODEC_TYPE_AUDIO:
188 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
189 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
190 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
191 if (i > 0) {
192 codec->sample_rate = i;
193 get_word_sep(buf, sizeof(buf), "/", &p);
194 i = atoi(buf);
195 if (i > 0)
196 codec->channels = i;
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197 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
198 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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199 }
200 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
201 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
202 break;
203 case CODEC_TYPE_VIDEO:
204 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
205 break;
206 default:
207 break;
208 }
209 return 0;
93ced3e8 210 }
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211
212 return -1;
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213}
214
215/* return the length and optionnaly the data */
216static int hex_to_data(uint8_t *data, const char *p)
217{
218 int c, len, v;
219
220 len = 0;
221 v = 1;
222 for(;;) {
223 skip_spaces(&p);
224 if (p == '\0')
225 break;
226 c = toupper((unsigned char)*p++);
227 if (c >= '0' && c <= '9')
228 c = c - '0';
229 else if (c >= 'A' && c <= 'F')
230 c = c - 'A' + 10;
231 else
232 break;
233 v = (v << 4) | c;
234 if (v & 0x100) {
235 if (data)
236 data[len] = v;
237 len++;
238 v = 1;
239 }
240 }
241 return len;
242}
243
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244static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
245{
246 switch (codec->codec_id) {
247 case CODEC_ID_MPEG4:
cbee7a69 248 case CODEC_ID_AAC:
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249 if (!strcmp(attr, "config")) {
250 /* decode the hexa encoded parameter */
251 int len = hex_to_data(NULL, value);
252 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
253 if (!codec->extradata)
254 return;
255 codec->extradata_size = len;
256 hex_to_data(codec->extradata, value);
257 }
258 break;
259 default:
260 break;
261 }
262 return;
263}
264
265typedef struct attrname_map
266{
7b49ce2e 267 const char *str;
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268 uint16_t type;
269 uint32_t offset;
270} attrname_map_t;
271
272/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
273#define ATTR_NAME_TYPE_INT 0
274#define ATTR_NAME_TYPE_STR 1
275static attrname_map_t attr_names[]=
276{
277 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
278 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
279 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
280 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
281 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
282 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
283 {NULL, -1, -1},
284};
285
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286/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
287* because it is used in rtp_h264.c, which is forthcoming.
288*/
289int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
290{
291 skip_spaces(p);
292 if(**p)
293 {
294 get_word_sep(attr, attr_size, "=", p);
295 if (**p == '=')
296 (*p)++;
297 get_word_sep(value, value_size, ";", p);
298 if (**p == ';')
299 (*p)++;
300 return 1;
301 }
302 return 0;
303}
304
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305/* parse a SDP line and save stream attributes */
306static void sdp_parse_fmtp(AVStream *st, const char *p)
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307{
308 char attr[256];
309 char value[4096];
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310 int i;
311
312 RTSPStream *rtsp_st = st->priv_data;
01f4895c 313 AVCodecContext *codec = st->codec;
d1ccf0e0 314 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
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315
316 /* loop on each attribute */
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317 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
318 {
bb270c08 319 /* grab the codec extra_data from the config parameter of the fmtp line */
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320 sdp_parse_fmtp_config(codec, attr, value);
321 /* Looking for a known attribute */
322 for (i = 0; attr_names[i].str; ++i) {
323 if (!strcasecmp(attr, attr_names[i].str)) {
324 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
325 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
326 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
327 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 328 }
93ced3e8 329 }
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330 }
331}
332
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333/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
334 * and end time.
335 * Used for seeking in the rtp stream.
336 */
337static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
338{
339 char buf[256];
340
341 skip_spaces(&p);
f7d78f36 342 if (!av_stristart(p, "npt=", &p))
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343 return;
344
345 *start = AV_NOPTS_VALUE;
346 *end = AV_NOPTS_VALUE;
347
348 get_word_sep(buf, sizeof(buf), "-", &p);
349 *start = parse_date(buf, 1);
350 if (*p == '-') {
351 p++;
352 get_word_sep(buf, sizeof(buf), "-", &p);
353 *end = parse_date(buf, 1);
354 }
355// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
356// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
357}
358
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359typedef struct SDPParseState {
360 /* SDP only */
361 struct in_addr default_ip;
362 int default_ttl;
363} SDPParseState;
364
365static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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366 int letter, const char *buf)
367{
8b1ab7bf 368 RTSPState *rt = s->priv_data;
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369 char buf1[64], st_type[64];
370 const char *p;
93ced3e8 371 int codec_type, payload_type, i;
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372 AVStream *st;
373 RTSPStream *rtsp_st;
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374 struct in_addr sdp_ip;
375 int ttl;
376
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377#ifdef DEBUG
378 printf("sdp: %c='%s'\n", letter, buf);
379#endif
380
381 p = buf;
382 switch(letter) {
93ced3e8
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383 case 'c':
384 get_word(buf1, sizeof(buf1), &p);
385 if (strcmp(buf1, "IN") != 0)
386 return;
387 get_word(buf1, sizeof(buf1), &p);
388 if (strcmp(buf1, "IP4") != 0)
389 return;
390 get_word_sep(buf1, sizeof(buf1), "/", &p);
391 if (inet_aton(buf1, &sdp_ip) == 0)
392 return;
393 ttl = 16;
394 if (*p == '/') {
395 p++;
396 get_word_sep(buf1, sizeof(buf1), "/", &p);
397 ttl = atoi(buf1);
398 }
399 if (s->nb_streams == 0) {
400 s1->default_ip = sdp_ip;
401 s1->default_ttl = ttl;
402 } else {
403 st = s->streams[s->nb_streams - 1];
404 rtsp_st = st->priv_data;
405 rtsp_st->sdp_ip = sdp_ip;
406 rtsp_st->sdp_ttl = ttl;
407 }
408 break;
1617ad97 409 case 's':
75e61b0e 410 av_strlcpy(s->title, p, sizeof(s->title));
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411 break;
412 case 'i':
413 if (s->nb_streams == 0) {
75e61b0e 414 av_strlcpy(s->comment, p, sizeof(s->comment));
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415 break;
416 }
417 break;
418 case 'm':
419 /* new stream */
420 get_word(st_type, sizeof(st_type), &p);
421 if (!strcmp(st_type, "audio")) {
422 codec_type = CODEC_TYPE_AUDIO;
423 } else if (!strcmp(st_type, "video")) {
424 codec_type = CODEC_TYPE_VIDEO;
425 } else {
426 return;
427 }
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428 rtsp_st = av_mallocz(sizeof(RTSPStream));
429 if (!rtsp_st)
430 return;
8b1ab7bf
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431 rtsp_st->stream_index = -1;
432 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
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433
434 rtsp_st->sdp_ip = s1->default_ip;
435 rtsp_st->sdp_ttl = s1->default_ttl;
436
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437 get_word(buf1, sizeof(buf1), &p); /* port */
438 rtsp_st->sdp_port = atoi(buf1);
439
440 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 441
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442 /* XXX: handle list of formats */
443 get_word(buf1, sizeof(buf1), &p); /* format list */
444 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 445
7ed19d7f 446 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
447 /* no corresponding stream */
448 } else {
449 st = av_new_stream(s, 0);
450 if (!st)
451 return;
452 st->priv_data = rtsp_st;
453 rtsp_st->stream_index = st->index;
01f4895c 454 st->codec->codec_type = codec_type;
d1ccf0e0 455 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 456 /* if standard payload type, we can find the codec right now */
01f4895c 457 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
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FB
458 }
459 }
1617ad97 460 /* put a default control url */
75e61b0e 461 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
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462 break;
463 case 'a':
f7d78f36 464 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
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465 char proto[32];
466 /* get the control url */
467 st = s->streams[s->nb_streams - 1];
468 rtsp_st = st->priv_data;
115329f1 469
1617ad97 470 /* XXX: may need to add full url resolution */
6ba5cbc6 471 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
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472 if (proto[0] == '\0') {
473 /* relative control URL */
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MR
474 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
475 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 476 } else {
75e61b0e 477 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
1617ad97 478 }
f7d78f36 479 } else if (av_strstart(p, "rtpmap:", &p)) {
93ced3e8 480 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 481 get_word(buf1, sizeof(buf1), &p);
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482 payload_type = atoi(buf1);
483 for(i = 0; i < s->nb_streams;i++) {
484 st = s->streams[i];
485 rtsp_st = st->priv_data;
486 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 487 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
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488 }
489 }
f7d78f36 490 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 491 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 492 get_word(buf1, sizeof(buf1), &p);
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493 payload_type = atoi(buf1);
494 for(i = 0; i < s->nb_streams;i++) {
495 st = s->streams[i];
496 rtsp_st = st->priv_data;
497 if (rtsp_st->sdp_payload_type == payload_type) {
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RM
498 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
499 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
500 sdp_parse_fmtp(st, p);
501 }
502 } else {
ed787542 503 sdp_parse_fmtp(st, p);
4934884a 504 }
93ced3e8
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505 }
506 }
f7d78f36 507 } else if(av_strstart(p, "framesize:", &p)) {
d0deedcb
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508 // let dynamic protocol handlers have a stab at the line.
509 get_word(buf1, sizeof(buf1), &p);
510 payload_type = atoi(buf1);
511 for(i = 0; i < s->nb_streams;i++) {
512 st = s->streams[i];
513 rtsp_st = st->priv_data;
514 if (rtsp_st->sdp_payload_type == payload_type) {
515 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
516 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
517 }
518 }
519 }
f7d78f36 520 } else if(av_strstart(p, "range:", &p)) {
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521 int64_t start, end;
522
523 // this is so that seeking on a streamed file can work.
524 rtsp_parse_range_npt(p, &start, &end);
525 s->start_time= start;
526 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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527 }
528 break;
529 }
530}
531
5c91a675 532static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
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533{
534 const char *p;
535 int letter;
536 char buf[1024], *q;
93ced3e8 537 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 538
93ced3e8 539 memset(s1, 0, sizeof(SDPParseState));
1617ad97
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540 p = content;
541 for(;;) {
542 skip_spaces(&p);
543 letter = *p;
544 if (letter == '\0')
545 break;
546 p++;
547 if (*p != '=')
548 goto next_line;
549 p++;
550 /* get the content */
551 q = buf;
b6892136 552 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
553 if ((q - buf) < sizeof(buf) - 1)
554 *q++ = *p;
555 p++;
556 }
557 *q = '\0';
93ced3e8 558 sdp_parse_line(s, s1, letter, buf);
1617ad97
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559 next_line:
560 while (*p != '\n' && *p != '\0')
561 p++;
562 if (*p == '\n')
563 p++;
564 }
565 return 0;
566}
567
568static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
569{
570 const char *p;
571 int v;
572
573 p = *pp;
574 skip_spaces(&p);
575 v = strtol(p, (char **)&p, 10);
576 if (*p == '-') {
577 p++;
578 *min_ptr = v;
579 v = strtol(p, (char **)&p, 10);
580 *max_ptr = v;
581 } else {
582 *min_ptr = v;
583 *max_ptr = v;
584 }
585 *pp = p;
586}
587
588/* XXX: only one transport specification is parsed */
589static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
590{
591 char transport_protocol[16];
592 char profile[16];
593 char lower_transport[16];
594 char parameter[16];
595 RTSPTransportField *th;
596 char buf[256];
115329f1 597
1617ad97 598 reply->nb_transports = 0;
115329f1 599
1617ad97
FB
600 for(;;) {
601 skip_spaces(&p);
602 if (*p == '\0')
603 break;
604
605 th = &reply->transports[reply->nb_transports];
606
115329f1 607 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
608 "/", &p);
609 if (*p == '/')
610 p++;
e1502118 611 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
612 get_word_sep(profile, sizeof(profile), "/;,", &p);
613 lower_transport[0] = '\0';
614 /* rtp/avp/<protocol> */
615 if (*p == '/') {
616 p++;
617 get_word_sep(lower_transport, sizeof(lower_transport),
618 ";,", &p);
619 }
620 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
621 /* x-pn-tng/<protocol> */
e1502118
LB
622 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
623 profile[0] = '\0';
1617ad97 624 }
b6892136 625 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
626 th->protocol = RTSP_PROTOCOL_RTP_TCP;
627 else
628 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 629
1617ad97
FB
630 if (*p == ';')
631 p++;
632 /* get each parameter */
633 while (*p != '\0' && *p != ',') {
634 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
635 if (!strcmp(parameter, "port")) {
636 if (*p == '=') {
637 p++;
638 rtsp_parse_range(&th->port_min, &th->port_max, &p);
639 }
640 } else if (!strcmp(parameter, "client_port")) {
641 if (*p == '=') {
642 p++;
115329f1 643 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
644 &th->client_port_max, &p);
645 }
646 } else if (!strcmp(parameter, "server_port")) {
647 if (*p == '=') {
648 p++;
115329f1 649 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
650 &th->server_port_max, &p);
651 }
652 } else if (!strcmp(parameter, "interleaved")) {
653 if (*p == '=') {
654 p++;
115329f1 655 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
656 &th->interleaved_max, &p);
657 }
658 } else if (!strcmp(parameter, "multicast")) {
659 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
660 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
661 } else if (!strcmp(parameter, "ttl")) {
662 if (*p == '=') {
663 p++;
664 th->ttl = strtol(p, (char **)&p, 10);
665 }
666 } else if (!strcmp(parameter, "destination")) {
667 struct in_addr ipaddr;
668
669 if (*p == '=') {
670 p++;
671 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 672 if (inet_aton(buf, &ipaddr))
1617ad97
FB
673 th->destination = ntohl(ipaddr.s_addr);
674 }
675 }
676 while (*p != ';' && *p != '\0' && *p != ',')
677 p++;
678 if (*p == ';')
679 p++;
680 }
681 if (*p == ',')
682 p++;
683
684 reply->nb_transports++;
685 }
686}
687
688void rtsp_parse_line(RTSPHeader *reply, const char *buf)
689{
690 const char *p;
691
692 /* NOTE: we do case independent match for broken servers */
693 p = buf;
f7d78f36 694 if (av_stristart(p, "Session:", &p)) {
1617ad97 695 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
f7d78f36 696 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 697 reply->content_length = strtol(p, NULL, 10);
f7d78f36 698 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 699 rtsp_parse_transport(reply, p);
f7d78f36 700 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 701 reply->seq = strtol(p, NULL, 10);
f7d78f36 702 } else if (av_stristart(p, "Range:", &p)) {
31693e00 703 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1617ad97
FB
704 }
705}
706
2a42b5c3
LS
707static int url_readbuf(URLContext *h, unsigned char *buf, int size)
708{
709 int ret, len;
710
711 len = 0;
712 while (len < size) {
713 ret = url_read(h, buf+len, size-len);
714 if (ret < 1)
715 return ret;
716 len += ret;
717 }
718 return len;
719}
720
b7b8fc34
FB
721/* skip a RTP/TCP interleaved packet */
722static void rtsp_skip_packet(AVFormatContext *s)
723{
724 RTSPState *rt = s->priv_data;
725 int ret, len, len1;
726 uint8_t buf[1024];
727
2a42b5c3 728 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
729 if (ret != 3)
730 return;
80fb8234 731 len = AV_RB16(buf + 1);
b7b8fc34
FB
732#ifdef DEBUG
733 printf("skipping RTP packet len=%d\n", len);
734#endif
735 /* skip payload */
736 while (len > 0) {
737 len1 = len;
738 if (len1 > sizeof(buf))
739 len1 = sizeof(buf);
2a42b5c3 740 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
741 if (ret != len1)
742 return;
743 len -= len1;
744 }
745}
1617ad97 746
115329f1
DB
747static void rtsp_send_cmd(AVFormatContext *s,
748 const char *cmd, RTSPHeader *reply,
1617ad97
FB
749 unsigned char **content_ptr)
750{
751 RTSPState *rt = s->priv_data;
752 char buf[4096], buf1[1024], *q;
753 unsigned char ch;
754 const char *p;
755 int content_length, line_count;
756 unsigned char *content = NULL;
757
758 memset(reply, 0, sizeof(RTSPHeader));
759
760 rt->seq++;
75e61b0e 761 av_strlcpy(buf, cmd, sizeof(buf));
b6892136 762 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
75e61b0e 763 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 764 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 765 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
75e61b0e 766 av_strlcat(buf, buf1, sizeof(buf));
1617ad97 767 }
75e61b0e 768 av_strlcat(buf, "\r\n", sizeof(buf));
1617ad97
FB
769#ifdef DEBUG
770 printf("Sending:\n%s--\n", buf);
771#endif
772 url_write(rt->rtsp_hd, buf, strlen(buf));
773
774 /* parse reply (XXX: use buffers) */
775 line_count = 0;
776 rt->last_reply[0] = '\0';
777 for(;;) {
778 q = buf;
779 for(;;) {
2a42b5c3 780 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
781 break;
782 if (ch == '\n')
783 break;
b7b8fc34
FB
784 if (ch == '$') {
785 /* XXX: only parse it if first char on line ? */
786 rtsp_skip_packet(s);
787 } else if (ch != '\r') {
1617ad97
FB
788 if ((q - buf) < sizeof(buf) - 1)
789 *q++ = ch;
790 }
791 }
792 *q = '\0';
793#ifdef DEBUG
794 printf("line='%s'\n", buf);
795#endif
796 /* test if last line */
797 if (buf[0] == '\0')
798 break;
799 p = buf;
800 if (line_count == 0) {
801 /* get reply code */
802 get_word(buf1, sizeof(buf1), &p);
803 get_word(buf1, sizeof(buf1), &p);
804 reply->status_code = atoi(buf1);
805 } else {
806 rtsp_parse_line(reply, p);
75e61b0e
MR
807 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
808 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
809 }
810 line_count++;
811 }
115329f1 812
1617ad97 813 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 814 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 815
1617ad97
FB
816 content_length = reply->content_length;
817 if (content_length > 0) {
818 /* leave some room for a trailing '\0' (useful for simple parsing) */
819 content = av_malloc(content_length + 1);
2a42b5c3 820 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
821 content[content_length] = '\0';
822 }
823 if (content_ptr)
824 *content_ptr = content;
e2e2e7dd
AB
825 else
826 av_free(content);
1617ad97
FB
827}
828
1617ad97 829
8b1ab7bf
FB
830/* close and free RTSP streams */
831static void rtsp_close_streams(RTSPState *rt)
832{
833 int i;
834 RTSPStream *rtsp_st;
835
836 for(i=0;i<rt->nb_rtsp_streams;i++) {
837 rtsp_st = rt->rtsp_streams[i];
838 if (rtsp_st) {
839 if (rtsp_st->rtp_ctx)
840 rtp_parse_close(rtsp_st->rtp_ctx);
841 if (rtsp_st->rtp_handle)
842 url_close(rtsp_st->rtp_handle);
4934884a
RM
843 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
844 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf 845 }
8b1ab7bf
FB
846 }
847 av_free(rt->rtsp_streams);
848}
849
53620bba
RB
850/**
851 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
852 */
853static int
8792f52a 854make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
1617ad97
FB
855{
856 RTSPState *rt = s->priv_data;
53620bba 857 int j, i, err;
1617ad97 858 RTSPStream *rtsp_st;
8b1ab7bf 859 AVStream *st;
53620bba
RB
860 RTSPHeader reply1, *reply = &reply1;
861 char cmd[2048];
115329f1 862
1617ad97
FB
863 /* for each stream, make the setup request */
864 /* XXX: we assume the same server is used for the control of each
865 RTSP stream */
d1ccf0e0
RD
866
867 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
868 char transport[2048];
869
8b1ab7bf 870 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
871
872 /* compute available transports */
873 transport[0] = '\0';
874
875 /* RTP/UDP */
8792f52a 876 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
85fb7b34 877 char buf[256];
85fb7b34
FB
878
879 /* first try in specified port range */
d1ccf0e0
RD
880 if (RTSP_RTP_PORT_MIN != 0) {
881 while(j <= RTSP_RTP_PORT_MAX) {
b316aa1a 882 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
ecdcbbf6 883 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
dbf30963 884 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
85fb7b34 885 goto rtp_opened;
d1ccf0e0 886 }
85fb7b34 887 }
1617ad97 888 }
85fb7b34 889
d1ccf0e0
RD
890/* then try on any port
891** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
892** err = AVERROR_INVALIDDATA;
893** goto fail;
894** }
895*/
85fb7b34
FB
896
897 rtp_opened:
8b1ab7bf 898 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97 899 if (transport[0] != '\0')
75e61b0e 900 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
901 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
902 "RTP/AVP/UDP;unicast;client_port=%d-%d",
903 port, port + 1);
904 }
905
906 /* RTP/TCP */
8792f52a 907 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
1617ad97 908 if (transport[0] != '\0')
75e61b0e 909 av_strlcat(transport, ",", sizeof(transport));
1617ad97
FB
910 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
911 "RTP/AVP/TCP");
912 }
913
8792f52a 914 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
1617ad97 915 if (transport[0] != '\0')
75e61b0e 916 av_strlcat(transport, ",", sizeof(transport));
115329f1 917 snprintf(transport + strlen(transport),
1617ad97
FB
918 sizeof(transport) - strlen(transport) - 1,
919 "RTP/AVP/UDP;multicast");
920 }
115329f1 921 snprintf(cmd, sizeof(cmd),
b6892136
FB
922 "SETUP %s RTSP/1.0\r\n"
923 "Transport: %s\r\n",
1617ad97
FB
924 rtsp_st->control_url, transport);
925 rtsp_send_cmd(s, cmd, reply, NULL);
8a8754d8
RB
926 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
927 err = 1;
928 goto fail;
7e6ca34f
RB
929 } else if (reply->status_code != RTSP_STATUS_OK ||
930 reply->nb_transports != 1) {
1617ad97
FB
931 err = AVERROR_INVALIDDATA;
932 goto fail;
933 }
934
935 /* XXX: same protocol for all streams is required */
936 if (i > 0) {
937 if (reply->transports[0].protocol != rt->protocol) {
938 err = AVERROR_INVALIDDATA;
939 goto fail;
940 }
941 } else {
942 rt->protocol = reply->transports[0].protocol;
943 }
944
945 /* close RTP connection if not choosen */
946 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
8792f52a 947 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
8b1ab7bf
FB
948 url_close(rtsp_st->rtp_handle);
949 rtsp_st->rtp_handle = NULL;
1617ad97
FB
950 }
951
952 switch(reply->transports[0].protocol) {
953 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
954 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
955 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
956 break;
115329f1 957
1617ad97
FB
958 case RTSP_PROTOCOL_RTP_UDP:
959 {
960 char url[1024];
115329f1 961
1617ad97 962 /* XXX: also use address if specified */
115329f1 963 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 964 host, reply->transports[0].server_port_min);
8b1ab7bf 965 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
966 err = AVERROR_INVALIDDATA;
967 goto fail;
968 }
969 }
970 break;
971 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
972 {
973 char url[1024];
d02678ec 974 struct in_addr in;
1617ad97 975
d02678ec 976 in.s_addr = htonl(reply->transports[0].destination);
35b74c3d 977 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
d02678ec
LB
978 inet_ntoa(in),
979 reply->transports[0].port_min,
980 reply->transports[0].ttl);
dbf30963 981 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
982 err = AVERROR_INVALIDDATA;
983 goto fail;
984 }
985 }
986 break;
987 }
8b1ab7bf
FB
988 /* open the RTP context */
989 st = NULL;
990 if (rtsp_st->stream_index >= 0)
991 st = s->streams[rtsp_st->stream_index];
992 if (!st)
993 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 994 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
d1ccf0e0 995
8b1ab7bf 996 if (!rtsp_st->rtp_ctx) {
769e10f0 997 err = AVERROR(ENOMEM);
8b1ab7bf 998 goto fail;
4934884a
RM
999 } else {
1000 if(rtsp_st->dynamic_handler) {
1001 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1002 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1003 }
8b1ab7bf 1004 }
1617ad97
FB
1005 }
1006
53620bba
RB
1007 return 0;
1008
1009fail:
8a8754d8
RB
1010 for (i=0; i<rt->nb_rtsp_streams; i++) {
1011 if (rt->rtsp_streams[i]->rtp_handle) {
1012 url_close(rt->rtsp_streams[i]->rtp_handle);
1013 rt->rtsp_streams[i]->rtp_handle = NULL;
1014 }
1015 }
53620bba
RB
1016 return err;
1017}
1018
1019static int rtsp_read_header(AVFormatContext *s,
1020 AVFormatParameters *ap)
1021{
1022 RTSPState *rt = s->priv_data;
1023 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1024 URLContext *rtsp_hd;
1025 int port, ret, err;
1026 RTSPHeader reply1, *reply = &reply1;
1027 unsigned char *content = NULL;
1028 int protocol_mask = 0;
1029
1030 /* extract hostname and port */
1031 url_split(NULL, 0, NULL, 0,
1032 host, sizeof(host), &port, path, sizeof(path), s->filename);
1033 if (port < 0)
1034 port = RTSP_DEFAULT_PORT;
1035
1036 /* search for options */
1037 option_list = strchr(path, '?');
1038 if (option_list) {
1039 /* remove the options from the path */
1040 *option_list++ = 0;
1041 while(option_list) {
1042 /* move the option pointer */
1043 option = option_list;
1044 option_list = strchr(option_list, '&');
1045 if (option_list)
1046 *(option_list++) = 0;
1047 /* handle the options */
1048 if (strcmp(option, "udp") == 0)
1049 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1050 else if (strcmp(option, "multicast") == 0)
1051 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1052 else if (strcmp(option, "tcp") == 0)
1053 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1054 }
1055 }
1056
1057 if (!protocol_mask)
8a8754d8 1058 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
53620bba
RB
1059
1060 /* open the tcp connexion */
1061 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1062 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1063 return AVERROR(EIO);
1064 rt->rtsp_hd = rtsp_hd;
1065 rt->seq = 0;
1066
1067 /* describe the stream */
1068 snprintf(cmd, sizeof(cmd),
1069 "DESCRIBE %s RTSP/1.0\r\n"
1070 "Accept: application/sdp\r\n",
1071 s->filename);
1072 rtsp_send_cmd(s, cmd, reply, &content);
1073 if (!content) {
1074 err = AVERROR_INVALIDDATA;
1075 goto fail;
1076 }
1077 if (reply->status_code != RTSP_STATUS_OK) {
1078 err = AVERROR_INVALIDDATA;
1079 goto fail;
1080 }
1081
1082 /* now we got the SDP description, we parse it */
1083 ret = sdp_parse(s, (const char *)content);
1084 av_freep(&content);
1085 if (ret < 0) {
1086 err = AVERROR_INVALIDDATA;
1087 goto fail;
1088 }
1089
8a8754d8 1090 do {
8792f52a 1091 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
8a8754d8
RB
1092
1093 err = make_setup_request(s, host, port, protocol);
1094 if (err < 0)
7e6ca34f 1095 goto fail;
8792f52a 1096 protocol_mask &= ~(1 << protocol);
8a8754d8 1097 if (protocol_mask == 0 && err == 1) {
5ee0e139 1098 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
8a8754d8
RB
1099 goto fail;
1100 }
1101 } while (err);
53620bba 1102
ff762d6e
FB
1103 rt->state = RTSP_STATE_IDLE;
1104 rt->seek_timestamp = 0; /* default is to start stream at position
1105 zero */
c04c3282 1106 if (ap->initial_pause) {
ff762d6e
FB
1107 /* do not start immediately */
1108 } else {
1109 if (rtsp_read_play(s) < 0) {
1110 err = AVERROR_INVALIDDATA;
1617ad97
FB
1111 goto fail;
1112 }
1113 }
1617ad97
FB
1114 return 0;
1115 fail:
8b1ab7bf 1116 rtsp_close_streams(rt);
1617ad97
FB
1117 av_freep(&content);
1118 url_close(rt->rtsp_hd);
1119 return err;
1120}
1121
8b1ab7bf
FB
1122static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1123 uint8_t *buf, int buf_size)
1617ad97
FB
1124{
1125 RTSPState *rt = s->priv_data;
b6892136 1126 int id, len, i, ret;
1617ad97 1127 RTSPStream *rtsp_st;
1617ad97 1128
b6892136
FB
1129#ifdef DEBUG_RTP_TCP
1130 printf("tcp_read_packet:\n");
1131#endif
1617ad97
FB
1132 redo:
1133 for(;;) {
2a42b5c3 1134 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1135#ifdef DEBUG_RTP_TCP
1136 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1137#endif
1138 if (ret != 1)
8b1ab7bf 1139 return -1;
b6892136 1140 if (buf[0] == '$')
1617ad97
FB
1141 break;
1142 }
2a42b5c3 1143 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1144 if (ret != 3)
8b1ab7bf 1145 return -1;
b6892136 1146 id = buf[0];
80fb8234 1147 len = AV_RB16(buf + 1);
b6892136
FB
1148#ifdef DEBUG_RTP_TCP
1149 printf("id=%d len=%d\n", id, len);
1150#endif
8b1ab7bf 1151 if (len > buf_size || len < 12)
1617ad97
FB
1152 goto redo;
1153 /* get the data */
2a42b5c3 1154 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1155 if (ret != len)
8b1ab7bf 1156 return -1;
115329f1 1157
1617ad97 1158 /* find the matching stream */
8b1ab7bf
FB
1159 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1160 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1161 if (id >= rtsp_st->interleaved_min &&
1162 id <= rtsp_st->interleaved_max)
1617ad97
FB
1163 goto found;
1164 }
1165 goto redo;
1166 found:
8b1ab7bf
FB
1167 *prtsp_st = rtsp_st;
1168 return len;
1617ad97
FB
1169}
1170
115329f1 1171static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1172 uint8_t *buf, int buf_size)
1617ad97 1173{
8b1ab7bf 1174 RTSPState *rt = s->priv_data;
1617ad97
FB
1175 RTSPStream *rtsp_st;
1176 fd_set rfds;
1177 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1178 struct timeval tv;
1179
1180 for(;;) {
b7b8fc34 1181 if (url_interrupt_cb())
a960a1e0 1182 return AVERROR(EINTR);
1617ad97
FB
1183 FD_ZERO(&rfds);
1184 fd_max = -1;
8b1ab7bf
FB
1185 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1186 rtsp_st = rt->rtsp_streams[i];
1617ad97 1187 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1188 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1189 if (fd1 > fd_max)
1190 fd_max = fd1;
1191 FD_SET(fd1, &rfds);
1192 }
1617ad97 1193 tv.tv_sec = 0;
b7b8fc34 1194 tv.tv_usec = 100 * 1000;
1617ad97
FB
1195 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1196 if (n > 0) {
8b1ab7bf
FB
1197 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1198 rtsp_st = rt->rtsp_streams[i];
1199 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1200 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1201 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1202 if (ret > 0) {
1203 *prtsp_st = rtsp_st;
1617ad97
FB
1204 return ret;
1205 }
1206 }
1207 }
1208 }
1209 }
1210}
1211
1212static int rtsp_read_packet(AVFormatContext *s,
1213 AVPacket *pkt)
1214{
1215 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1216 RTSPStream *rtsp_st;
1217 int ret, len;
1218 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1219
1220 /* get next frames from the same RTP packet */
1221 if (rt->cur_rtp) {
1222 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1223 if (ret == 0) {
1224 rt->cur_rtp = NULL;
1225 return 0;
1226 } else if (ret == 1) {
1227 return 0;
1228 } else {
1229 rt->cur_rtp = NULL;
1230 }
1231 }
1617ad97 1232
8b1ab7bf
FB
1233 /* read next RTP packet */
1234 redo:
1617ad97
FB
1235 switch(rt->protocol) {
1236 default:
1237 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1238 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1239 break;
1240 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1241 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1242 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
74ef8b43 1243 if (len >=0 && rtsp_st->rtp_ctx)
dbf30963 1244 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1245 break;
1246 }
8b1ab7bf 1247 if (len < 0)
489b0d4d 1248 return len;
8b1ab7bf
FB
1249 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1250 if (ret < 0)
1251 goto redo;
1252 if (ret == 1) {
1253 /* more packets may follow, so we save the RTP context */
1254 rt->cur_rtp = rtsp_st->rtp_ctx;
1255 }
1256 return 0;
1617ad97
FB
1257}
1258
ff762d6e 1259static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1260{
ff762d6e 1261 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1262 RTSPHeader reply1, *reply = &reply1;
1263 char cmd[1024];
1264
bc874dae 1265 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1266
1267 if (rt->state == RTSP_STATE_PAUSED) {
115329f1 1268 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1269 "PLAY %s RTSP/1.0\r\n",
1270 s->filename);
1271 } else {
115329f1 1272 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1273 "PLAY %s RTSP/1.0\r\n"
1274 "Range: npt=%0.3f-\r\n",
1275 s->filename,
1276 (double)rt->seek_timestamp / AV_TIME_BASE);
1277 }
b7b8fc34
FB
1278 rtsp_send_cmd(s, cmd, reply, NULL);
1279 if (reply->status_code != RTSP_STATUS_OK) {
1280 return -1;
1281 } else {
ff762d6e 1282 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1283 return 0;
1284 }
1285}
1286
ff762d6e
FB
1287/* pause the stream */
1288static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1289{
ff762d6e 1290 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1291 RTSPHeader reply1, *reply = &reply1;
1292 char cmd[1024];
1293
b7b8fc34 1294 rt = s->priv_data;
115329f1 1295
ff762d6e
FB
1296 if (rt->state != RTSP_STATE_PLAYING)
1297 return 0;
1298
115329f1 1299 snprintf(cmd, sizeof(cmd),
ff762d6e 1300 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1301 s->filename);
1302 rtsp_send_cmd(s, cmd, reply, NULL);
1303 if (reply->status_code != RTSP_STATUS_OK) {
1304 return -1;
1305 } else {
ff762d6e 1306 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1307 return 0;
1308 }
1309}
1310
115329f1 1311static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1312 int64_t timestamp, int flags)
ff762d6e
FB
1313{
1314 RTSPState *rt = s->priv_data;
115329f1 1315
50755217 1316 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
ff762d6e
FB
1317 switch(rt->state) {
1318 default:
1319 case RTSP_STATE_IDLE:
1320 break;
1321 case RTSP_STATE_PLAYING:
1322 if (rtsp_read_play(s) != 0)
1323 return -1;
1324 break;
1325 case RTSP_STATE_PAUSED:
1326 rt->state = RTSP_STATE_IDLE;
1327 break;
1328 }
1329 return 0;
1330}
1331
1617ad97
FB
1332static int rtsp_read_close(AVFormatContext *s)
1333{
1334 RTSPState *rt = s->priv_data;
1617ad97 1335 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1336 char cmd[1024];
1337
b6892136 1338#if 0
1617ad97
FB
1339 /* NOTE: it is valid to flush the buffer here */
1340 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1341 url_fclose(&rt->rtsp_gb);
1342 }
b6892136 1343#endif
115329f1 1344 snprintf(cmd, sizeof(cmd),
b6892136 1345 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1346 s->filename);
1347 rtsp_send_cmd(s, cmd, reply, NULL);
1348
8b1ab7bf 1349 rtsp_close_streams(rt);
1617ad97
FB
1350 url_close(rt->rtsp_hd);
1351 return 0;
1352}
1353
96862926 1354#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1355AVInputFormat rtsp_demuxer = {
1617ad97 1356 "rtsp",
bde15e74 1357 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1358 sizeof(RTSPState),
1359 rtsp_probe,
1360 rtsp_read_header,
1361 rtsp_read_packet,
1362 rtsp_read_close,
ff762d6e 1363 rtsp_read_seek,
bb76a117 1364 .flags = AVFMT_NOFILE,
ff762d6e
FB
1365 .read_play = rtsp_read_play,
1366 .read_pause = rtsp_read_pause,
1617ad97 1367};
96862926 1368#endif
1617ad97 1369
cb1fdc61 1370static int sdp_probe(AVProbeData *p1)
93ced3e8 1371{
0e1ceacd 1372 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1373
1374 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 1375 while (p < p_end && *p != '\0') {
f7d78f36 1376 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 1377 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1378
1379 while(p < p_end - 1 && *p != '\n') p++;
1380 if (++p >= p_end)
cb1fdc61 1381 break;
cb1fdc61
FB
1382 if (*p == '\r')
1383 p++;
1384 }
93ced3e8
FB
1385 return 0;
1386}
1387
1388#define SDP_MAX_SIZE 8192
1389
1390static int sdp_read_header(AVFormatContext *s,
1391 AVFormatParameters *ap)
1392{
8b1ab7bf 1393 RTSPState *rt = s->priv_data;
93ced3e8
FB
1394 RTSPStream *rtsp_st;
1395 int size, i, err;
1396 char *content;
1397 char url[1024];
8b1ab7bf 1398 AVStream *st;
93ced3e8
FB
1399
1400 /* read the whole sdp file */
1401 /* XXX: better loading */
1402 content = av_malloc(SDP_MAX_SIZE);
899681cd 1403 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
1404 if (size <= 0) {
1405 av_free(content);
1406 return AVERROR_INVALIDDATA;
1407 }
1408 content[size] ='\0';
1409
1410 sdp_parse(s, content);
1411 av_free(content);
1412
1413 /* open each RTP stream */
8b1ab7bf
FB
1414 for(i=0;i<rt->nb_rtsp_streams;i++) {
1415 rtsp_st = rt->rtsp_streams[i];
115329f1 1416
d2bf42be 1417 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
115329f1 1418 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8 1419 rtsp_st->sdp_port,
d2bf42be 1420 rtsp_st->sdp_port,
93ced3e8 1421 rtsp_st->sdp_ttl);
dbf30963 1422 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1423 err = AVERROR_INVALIDDATA;
1424 goto fail;
1425 }
8b1ab7bf
FB
1426 /* open the RTP context */
1427 st = NULL;
1428 if (rtsp_st->stream_index >= 0)
1429 st = s->streams[rtsp_st->stream_index];
1430 if (!st)
1431 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1432 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
8b1ab7bf 1433 if (!rtsp_st->rtp_ctx) {
769e10f0 1434 err = AVERROR(ENOMEM);
8b1ab7bf 1435 goto fail;
4934884a
RM
1436 } else {
1437 if(rtsp_st->dynamic_handler) {
1438 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1439 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1440 }
8b1ab7bf 1441 }
93ced3e8
FB
1442 }
1443 return 0;
1444 fail:
8b1ab7bf 1445 rtsp_close_streams(rt);
93ced3e8
FB
1446 return err;
1447}
1448
1449static int sdp_read_packet(AVFormatContext *s,
1450 AVPacket *pkt)
1451{
8b1ab7bf 1452 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1453}
1454
1455static int sdp_read_close(AVFormatContext *s)
1456{
8b1ab7bf
FB
1457 RTSPState *rt = s->priv_data;
1458 rtsp_close_streams(rt);
93ced3e8
FB
1459 return 0;
1460}
1461
ff70e601
MR
1462#ifdef CONFIG_SDP_DEMUXER
1463AVInputFormat sdp_demuxer = {
93ced3e8 1464 "sdp",
bde15e74 1465 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
1466 sizeof(RTSPState),
1467 sdp_probe,
1468 sdp_read_header,
1469 sdp_read_packet,
1470 sdp_read_close,
1471};
ff70e601 1472#endif
93ced3e8 1473
e7047005 1474#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1475/* dummy redirector format (used directly in av_open_input_file now) */
1476static int redir_probe(AVProbeData *pd)
1477{
1478 const char *p;
1479 p = pd->buf;
1480 while (redir_isspace(*p))
1481 p++;
f7d78f36
MR
1482 if (av_strstart(p, "http://", NULL) ||
1483 av_strstart(p, "rtsp://", NULL))
1617ad97
FB
1484 return AVPROBE_SCORE_MAX;
1485 return 0;
1486}
1487
e8acf0ed 1488static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1617ad97
FB
1489{
1490 char buf[4096], *q;
1491 int c;
1492 AVFormatContext *ic = NULL;
e8acf0ed 1493 ByteIOContext *f = s->pb;
1617ad97
FB
1494
1495 /* parse each URL and try to open it */
1496 c = url_fgetc(f);
1497 while (c != URL_EOF) {
1498 /* skip spaces */
1499 for(;;) {
1500 if (!redir_isspace(c))
1501 break;
1502 c = url_fgetc(f);
1503 }
1504 if (c == URL_EOF)
1505 break;
1506 /* record url */
1507 q = buf;
1508 for(;;) {
1509 if (c == URL_EOF || redir_isspace(c))
1510 break;
1511 if ((q - buf) < sizeof(buf) - 1)
1512 *q++ = c;
1513 c = url_fgetc(f);
1514 }
1515 *q = '\0';
1516 //printf("URL='%s'\n", buf);
1517 /* try to open the media file */
1518 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1519 break;
1520 }
1617ad97 1521 if (!ic)
6f3e0b21 1522 return AVERROR(EIO);
e8acf0ed
LA
1523
1524 *s = *ic;
1525 url_fclose(f);
1526
1527 return 0;
1617ad97
FB
1528}
1529
d2a067d1 1530AVInputFormat redir_demuxer = {
1617ad97 1531 "redir",
bde15e74 1532 NULL_IF_CONFIG_SMALL("Redirector format"),
1617ad97
FB
1533 0,
1534 redir_probe,
e8acf0ed 1535 redir_read_header,
1617ad97
FB
1536 NULL,
1537 NULL,
1538};
e7047005 1539#endif