add some string functions
[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
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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"
1617ad97 26
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27#include "rtp_internal.h"
28
1617ad97 29//#define DEBUG
b6892136 30//#define DEBUG_RTP_TCP
1617ad97 31
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32enum RTSPClientState {
33 RTSP_STATE_IDLE,
34 RTSP_STATE_PLAYING,
35 RTSP_STATE_PAUSED,
36};
37
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38typedef struct RTSPState {
39 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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40 int nb_rtsp_streams;
41 struct RTSPStream **rtsp_streams;
115329f1 42
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43 enum RTSPClientState state;
44 int64_t seek_timestamp;
115329f1 45
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46 /* XXX: currently we use unbuffered input */
47 // ByteIOContext rtsp_gb;
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48 int seq; /* RTSP command sequence number */
49 char session_id[512];
50 enum RTSPProtocol protocol;
51 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 52 RTPDemuxContext *cur_rtp;
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53} RTSPState;
54
55typedef struct RTSPStream {
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56 URLContext *rtp_handle; /* RTP stream handle */
57 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 58
8b1ab7bf 59 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 60 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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61 char control_url[1024]; /* url for this stream (from SDP) */
62
63 int sdp_port; /* port (from SDP content - not used in RTSP) */
64 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
65 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
66 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 67 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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68
69 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
70 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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71} RTSPStream;
72
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73static int rtsp_read_play(AVFormatContext *s);
74
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75/* XXX: currently, the only way to change the protocols consists in
76 changing this variable */
1617ad97 77
d1ccf0e0 78int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
85fb7b34 79
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80static int rtsp_probe(AVProbeData *p)
81{
82 if (strstart(p->filename, "rtsp:", NULL))
83 return AVPROBE_SCORE_MAX;
84 return 0;
85}
86
87static int redir_isspace(int c)
88{
89 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
90}
91
92static void skip_spaces(const char **pp)
93{
94 const char *p;
95 p = *pp;
96 while (redir_isspace(*p))
97 p++;
98 *pp = p;
99}
100
115329f1 101static void get_word_sep(char *buf, int buf_size, const char *sep,
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102 const char **pp)
103{
104 const char *p;
105 char *q;
106
107 p = *pp;
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108 if (*p == '/')
109 p++;
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110 skip_spaces(&p);
111 q = buf;
112 while (!strchr(sep, *p) && *p != '\0') {
113 if ((q - buf) < buf_size - 1)
114 *q++ = *p;
115 p++;
116 }
117 if (buf_size > 0)
118 *q = '\0';
119 *pp = p;
120}
121
122static void get_word(char *buf, int buf_size, const char **pp)
123{
124 const char *p;
125 char *q;
126
127 p = *pp;
128 skip_spaces(&p);
129 q = buf;
130 while (!redir_isspace(*p) && *p != '\0') {
131 if ((q - buf) < buf_size - 1)
132 *q++ = *p;
133 p++;
134 }
135 if (buf_size > 0)
136 *q = '\0';
137 *pp = p;
138}
139
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140/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
141 params>] */
4934884a 142static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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143{
144 char buf[256];
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145 int i;
146 AVCodec *c;
7b49ce2e 147 const char *c_name;
93ced3e8 148
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149 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
150 see if we can handle this kind of payload */
93ced3e8 151 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 152 if (payload_type >= RTP_PT_PRIVATE) {
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153 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
154 while(handler) {
155 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
156 codec->codec_id = handler->codec_id;
157 rtsp_st->dynamic_handler= handler;
158 if(handler->open) {
159 rtsp_st->dynamic_protocol_context= handler->open();
160 }
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161 break;
162 }
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163 handler= handler->next;
164 }
93ced3e8 165 } else {
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166 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
167 /* search into AVRtpPayloadTypes[] */
168 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
169 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
170 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
171 break;
172 }
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);
340 if (!stristart(p, "npt=", &p))
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) {
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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;
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407 case 's':
408 pstrcpy(s->title, sizeof(s->title), p);
409 break;
410 case 'i':
411 if (s->nb_streams == 0) {
412 pstrcpy(s->comment, sizeof(s->comment), p);
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;
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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
d1ccf0e0 444 if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
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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);
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456 }
457 }
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458 /* put a default control url */
459 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
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460 break;
461 case 'a':
462 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
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 */
472 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
473 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
474 } else {
475 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
476 }
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477 } else if (strstart(p, "rtpmap:", &p)) {
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 }
488 } else if (strstart(p, "fmtp:", &p)) {
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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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 }
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503 }
504 }
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505 } else if(strstart(p, "framesize:", &p)) {
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 }
31693e00
RM
518 } else if(strstart(p, "range:", &p)) {
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)
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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));
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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') {
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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++;
609 get_word_sep(profile, sizeof(profile), "/;,", &p);
610 lower_transport[0] = '\0';
611 if (*p == '/') {
b6892136 612 p++;
115329f1 613 get_word_sep(lower_transport, sizeof(lower_transport),
1617ad97
FB
614 ";,", &p);
615 }
b6892136 616 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
617 th->protocol = RTSP_PROTOCOL_RTP_TCP;
618 else
619 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 620
1617ad97
FB
621 if (*p == ';')
622 p++;
623 /* get each parameter */
624 while (*p != '\0' && *p != ',') {
625 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
626 if (!strcmp(parameter, "port")) {
627 if (*p == '=') {
628 p++;
629 rtsp_parse_range(&th->port_min, &th->port_max, &p);
630 }
631 } else if (!strcmp(parameter, "client_port")) {
632 if (*p == '=') {
633 p++;
115329f1 634 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
635 &th->client_port_max, &p);
636 }
637 } else if (!strcmp(parameter, "server_port")) {
638 if (*p == '=') {
639 p++;
115329f1 640 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
641 &th->server_port_max, &p);
642 }
643 } else if (!strcmp(parameter, "interleaved")) {
644 if (*p == '=') {
645 p++;
115329f1 646 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
647 &th->interleaved_max, &p);
648 }
649 } else if (!strcmp(parameter, "multicast")) {
650 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
651 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
652 } else if (!strcmp(parameter, "ttl")) {
653 if (*p == '=') {
654 p++;
655 th->ttl = strtol(p, (char **)&p, 10);
656 }
657 } else if (!strcmp(parameter, "destination")) {
658 struct in_addr ipaddr;
659
660 if (*p == '=') {
661 p++;
662 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 663 if (inet_aton(buf, &ipaddr))
1617ad97
FB
664 th->destination = ntohl(ipaddr.s_addr);
665 }
666 }
667 while (*p != ';' && *p != '\0' && *p != ',')
668 p++;
669 if (*p == ';')
670 p++;
671 }
672 if (*p == ',')
673 p++;
674
675 reply->nb_transports++;
676 }
677}
678
679void rtsp_parse_line(RTSPHeader *reply, const char *buf)
680{
681 const char *p;
682
683 /* NOTE: we do case independent match for broken servers */
684 p = buf;
685 if (stristart(p, "Session:", &p)) {
686 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
687 } else if (stristart(p, "Content-Length:", &p)) {
688 reply->content_length = strtol(p, NULL, 10);
689 } else if (stristart(p, "Transport:", &p)) {
690 rtsp_parse_transport(reply, p);
691 } else if (stristart(p, "CSeq:", &p)) {
692 reply->seq = strtol(p, NULL, 10);
ff762d6e 693 } else if (stristart(p, "Range:", &p)) {
31693e00 694 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1617ad97
FB
695 }
696}
697
2a42b5c3
LS
698static int url_readbuf(URLContext *h, unsigned char *buf, int size)
699{
700 int ret, len;
701
702 len = 0;
703 while (len < size) {
704 ret = url_read(h, buf+len, size-len);
705 if (ret < 1)
706 return ret;
707 len += ret;
708 }
709 return len;
710}
711
b7b8fc34
FB
712/* skip a RTP/TCP interleaved packet */
713static void rtsp_skip_packet(AVFormatContext *s)
714{
715 RTSPState *rt = s->priv_data;
716 int ret, len, len1;
717 uint8_t buf[1024];
718
2a42b5c3 719 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
720 if (ret != 3)
721 return;
722 len = (buf[1] << 8) | buf[2];
723#ifdef DEBUG
724 printf("skipping RTP packet len=%d\n", len);
725#endif
726 /* skip payload */
727 while (len > 0) {
728 len1 = len;
729 if (len1 > sizeof(buf))
730 len1 = sizeof(buf);
2a42b5c3 731 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
732 if (ret != len1)
733 return;
734 len -= len1;
735 }
736}
1617ad97 737
115329f1
DB
738static void rtsp_send_cmd(AVFormatContext *s,
739 const char *cmd, RTSPHeader *reply,
1617ad97
FB
740 unsigned char **content_ptr)
741{
742 RTSPState *rt = s->priv_data;
743 char buf[4096], buf1[1024], *q;
744 unsigned char ch;
745 const char *p;
746 int content_length, line_count;
747 unsigned char *content = NULL;
748
749 memset(reply, 0, sizeof(RTSPHeader));
750
751 rt->seq++;
752 pstrcpy(buf, sizeof(buf), cmd);
b6892136 753 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1617ad97
FB
754 pstrcat(buf, sizeof(buf), buf1);
755 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 756 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
1617ad97
FB
757 pstrcat(buf, sizeof(buf), buf1);
758 }
b6892136 759 pstrcat(buf, sizeof(buf), "\r\n");
1617ad97
FB
760#ifdef DEBUG
761 printf("Sending:\n%s--\n", buf);
762#endif
763 url_write(rt->rtsp_hd, buf, strlen(buf));
764
765 /* parse reply (XXX: use buffers) */
766 line_count = 0;
767 rt->last_reply[0] = '\0';
768 for(;;) {
769 q = buf;
770 for(;;) {
2a42b5c3 771 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
772 break;
773 if (ch == '\n')
774 break;
b7b8fc34
FB
775 if (ch == '$') {
776 /* XXX: only parse it if first char on line ? */
777 rtsp_skip_packet(s);
778 } else if (ch != '\r') {
1617ad97
FB
779 if ((q - buf) < sizeof(buf) - 1)
780 *q++ = ch;
781 }
782 }
783 *q = '\0';
784#ifdef DEBUG
785 printf("line='%s'\n", buf);
786#endif
787 /* test if last line */
788 if (buf[0] == '\0')
789 break;
790 p = buf;
791 if (line_count == 0) {
792 /* get reply code */
793 get_word(buf1, sizeof(buf1), &p);
794 get_word(buf1, sizeof(buf1), &p);
795 reply->status_code = atoi(buf1);
796 } else {
797 rtsp_parse_line(reply, p);
798 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
799 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
800 }
801 line_count++;
802 }
115329f1 803
1617ad97
FB
804 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
805 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
115329f1 806
1617ad97
FB
807 content_length = reply->content_length;
808 if (content_length > 0) {
809 /* leave some room for a trailing '\0' (useful for simple parsing) */
810 content = av_malloc(content_length + 1);
2a42b5c3 811 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
812 content[content_length] = '\0';
813 }
814 if (content_ptr)
815 *content_ptr = content;
816}
817
1617ad97 818
8b1ab7bf
FB
819/* close and free RTSP streams */
820static void rtsp_close_streams(RTSPState *rt)
821{
822 int i;
823 RTSPStream *rtsp_st;
824
825 for(i=0;i<rt->nb_rtsp_streams;i++) {
826 rtsp_st = rt->rtsp_streams[i];
827 if (rtsp_st) {
828 if (rtsp_st->rtp_ctx)
829 rtp_parse_close(rtsp_st->rtp_ctx);
830 if (rtsp_st->rtp_handle)
831 url_close(rtsp_st->rtp_handle);
4934884a
RM
832 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
833 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
8b1ab7bf
FB
834 }
835 av_free(rtsp_st);
836 }
837 av_free(rt->rtsp_streams);
838}
839
1617ad97
FB
840static int rtsp_read_header(AVFormatContext *s,
841 AVFormatParameters *ap)
842{
843 RTSPState *rt = s->priv_data;
badc9ae2 844 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1617ad97 845 URLContext *rtsp_hd;
d1ccf0e0 846 int port, i, j, ret, err;
1617ad97
FB
847 RTSPHeader reply1, *reply = &reply1;
848 unsigned char *content = NULL;
1617ad97 849 RTSPStream *rtsp_st;
8bd32c04 850 int protocol_mask = 0;
8b1ab7bf 851 AVStream *st;
1617ad97 852
1617ad97 853 /* extract hostname and port */
6ba5cbc6 854 url_split(NULL, 0, NULL, 0,
1617ad97
FB
855 host, sizeof(host), &port, path, sizeof(path), s->filename);
856 if (port < 0)
857 port = RTSP_DEFAULT_PORT;
858
badc9ae2
TV
859 /* search for options */
860 option_list = strchr(path, '?');
861 if (option_list) {
862 /* remove the options from the path */
863 *option_list++ = 0;
864 while(option_list) {
865 /* move the option pointer */
866 option = option_list;
867 option_list = strchr(option_list, '&');
868 if (option_list)
869 *(option_list++) = 0;
870 /* handle the options */
8bd32c04
TV
871 if (strcmp(option, "udp") == 0)
872 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
873 else if (strcmp(option, "multicast") == 0)
874 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
875 else if (strcmp(option, "tcp") == 0)
876 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
badc9ae2
TV
877 }
878 }
879
8bd32c04
TV
880 if (!protocol_mask)
881 protocol_mask = rtsp_default_protocols;
882
1617ad97
FB
883 /* open the tcp connexion */
884 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
885 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
886 return AVERROR_IO;
887 rt->rtsp_hd = rtsp_hd;
888 rt->seq = 0;
115329f1 889
1617ad97 890 /* describe the stream */
115329f1 891 snprintf(cmd, sizeof(cmd),
b6892136
FB
892 "DESCRIBE %s RTSP/1.0\r\n"
893 "Accept: application/sdp\r\n",
1617ad97
FB
894 s->filename);
895 rtsp_send_cmd(s, cmd, reply, &content);
896 if (!content) {
897 err = AVERROR_INVALIDDATA;
898 goto fail;
899 }
900 if (reply->status_code != RTSP_STATUS_OK) {
901 err = AVERROR_INVALIDDATA;
902 goto fail;
903 }
115329f1 904
1617ad97
FB
905 /* now we got the SDP description, we parse it */
906 ret = sdp_parse(s, (const char *)content);
907 av_freep(&content);
908 if (ret < 0) {
909 err = AVERROR_INVALIDDATA;
910 goto fail;
911 }
115329f1 912
1617ad97
FB
913 /* for each stream, make the setup request */
914 /* XXX: we assume the same server is used for the control of each
915 RTSP stream */
d1ccf0e0
RD
916
917 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
918 char transport[2048];
919
8b1ab7bf 920 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
921
922 /* compute available transports */
923 transport[0] = '\0';
924
925 /* RTP/UDP */
926 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
85fb7b34 927 char buf[256];
85fb7b34
FB
928
929 /* first try in specified port range */
d1ccf0e0
RD
930 if (RTSP_RTP_PORT_MIN != 0) {
931 while(j <= RTSP_RTP_PORT_MAX) {
85fb7b34 932 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
dbf30963 933 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
d1ccf0e0 934 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
85fb7b34 935 goto rtp_opened;
d1ccf0e0 936 }
85fb7b34 937 }
1617ad97 938 }
85fb7b34 939
d1ccf0e0
RD
940/* then try on any port
941** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
942** err = AVERROR_INVALIDDATA;
943** goto fail;
944** }
945*/
85fb7b34
FB
946
947 rtp_opened:
8b1ab7bf 948 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97
FB
949 if (transport[0] != '\0')
950 pstrcat(transport, sizeof(transport), ",");
951 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
952 "RTP/AVP/UDP;unicast;client_port=%d-%d",
953 port, port + 1);
954 }
955
956 /* RTP/TCP */
d1ccf0e0 957 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
1617ad97
FB
958 if (transport[0] != '\0')
959 pstrcat(transport, sizeof(transport), ",");
960 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
961 "RTP/AVP/TCP");
962 }
963
d1ccf0e0 964 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
1617ad97
FB
965 if (transport[0] != '\0')
966 pstrcat(transport, sizeof(transport), ",");
115329f1 967 snprintf(transport + strlen(transport),
1617ad97
FB
968 sizeof(transport) - strlen(transport) - 1,
969 "RTP/AVP/UDP;multicast");
970 }
115329f1 971 snprintf(cmd, sizeof(cmd),
b6892136
FB
972 "SETUP %s RTSP/1.0\r\n"
973 "Transport: %s\r\n",
1617ad97
FB
974 rtsp_st->control_url, transport);
975 rtsp_send_cmd(s, cmd, reply, NULL);
976 if (reply->status_code != RTSP_STATUS_OK ||
977 reply->nb_transports != 1) {
978 err = AVERROR_INVALIDDATA;
979 goto fail;
980 }
981
982 /* XXX: same protocol for all streams is required */
983 if (i > 0) {
984 if (reply->transports[0].protocol != rt->protocol) {
985 err = AVERROR_INVALIDDATA;
986 goto fail;
987 }
988 } else {
989 rt->protocol = reply->transports[0].protocol;
990 }
991
992 /* close RTP connection if not choosen */
993 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
994 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
8b1ab7bf
FB
995 url_close(rtsp_st->rtp_handle);
996 rtsp_st->rtp_handle = NULL;
1617ad97
FB
997 }
998
999 switch(reply->transports[0].protocol) {
1000 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
1001 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1002 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1003 break;
115329f1 1004
1617ad97
FB
1005 case RTSP_PROTOCOL_RTP_UDP:
1006 {
1007 char url[1024];
115329f1 1008
1617ad97 1009 /* XXX: also use address if specified */
115329f1 1010 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1011 host, reply->transports[0].server_port_min);
8b1ab7bf 1012 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1013 err = AVERROR_INVALIDDATA;
1014 goto fail;
1015 }
1016 }
1017 break;
1018 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1019 {
1020 char url[1024];
1021 int ttl;
1022
1617ad97
FB
1023 ttl = reply->transports[0].ttl;
1024 if (!ttl)
1025 ttl = 16;
115329f1
DB
1026 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1027 host,
1617ad97
FB
1028 reply->transports[0].server_port_min,
1029 ttl);
dbf30963 1030 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1031 err = AVERROR_INVALIDDATA;
1032 goto fail;
1033 }
1034 }
1035 break;
1036 }
8b1ab7bf
FB
1037 /* open the RTP context */
1038 st = NULL;
1039 if (rtsp_st->stream_index >= 0)
1040 st = s->streams[rtsp_st->stream_index];
1041 if (!st)
1042 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1043 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
d1ccf0e0 1044
8b1ab7bf
FB
1045 if (!rtsp_st->rtp_ctx) {
1046 err = AVERROR_NOMEM;
1047 goto fail;
4934884a
RM
1048 } else {
1049 if(rtsp_st->dynamic_handler) {
1050 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1051 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1052 }
8b1ab7bf 1053 }
1617ad97
FB
1054 }
1055
ff762d6e
FB
1056 rt->state = RTSP_STATE_IDLE;
1057 rt->seek_timestamp = 0; /* default is to start stream at position
1058 zero */
c04c3282 1059 if (ap->initial_pause) {
ff762d6e
FB
1060 /* do not start immediately */
1061 } else {
1062 if (rtsp_read_play(s) < 0) {
1063 err = AVERROR_INVALIDDATA;
1617ad97
FB
1064 goto fail;
1065 }
1066 }
1617ad97
FB
1067 return 0;
1068 fail:
8b1ab7bf 1069 rtsp_close_streams(rt);
1617ad97
FB
1070 av_freep(&content);
1071 url_close(rt->rtsp_hd);
1072 return err;
1073}
1074
8b1ab7bf
FB
1075static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1076 uint8_t *buf, int buf_size)
1617ad97
FB
1077{
1078 RTSPState *rt = s->priv_data;
b6892136 1079 int id, len, i, ret;
1617ad97 1080 RTSPStream *rtsp_st;
1617ad97 1081
b6892136
FB
1082#ifdef DEBUG_RTP_TCP
1083 printf("tcp_read_packet:\n");
1084#endif
1617ad97
FB
1085 redo:
1086 for(;;) {
2a42b5c3 1087 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1088#ifdef DEBUG_RTP_TCP
1089 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1090#endif
1091 if (ret != 1)
8b1ab7bf 1092 return -1;
b6892136 1093 if (buf[0] == '$')
1617ad97
FB
1094 break;
1095 }
2a42b5c3 1096 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1097 if (ret != 3)
8b1ab7bf 1098 return -1;
b6892136
FB
1099 id = buf[0];
1100 len = (buf[1] << 8) | buf[2];
1101#ifdef DEBUG_RTP_TCP
1102 printf("id=%d len=%d\n", id, len);
1103#endif
8b1ab7bf 1104 if (len > buf_size || len < 12)
1617ad97
FB
1105 goto redo;
1106 /* get the data */
2a42b5c3 1107 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1108 if (ret != len)
8b1ab7bf 1109 return -1;
115329f1 1110
1617ad97 1111 /* find the matching stream */
8b1ab7bf
FB
1112 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1113 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1114 if (id >= rtsp_st->interleaved_min &&
1115 id <= rtsp_st->interleaved_max)
1617ad97
FB
1116 goto found;
1117 }
1118 goto redo;
1119 found:
8b1ab7bf
FB
1120 *prtsp_st = rtsp_st;
1121 return len;
1617ad97
FB
1122}
1123
115329f1 1124static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1125 uint8_t *buf, int buf_size)
1617ad97 1126{
8b1ab7bf 1127 RTSPState *rt = s->priv_data;
1617ad97
FB
1128 RTSPStream *rtsp_st;
1129 fd_set rfds;
1130 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1131 struct timeval tv;
1132
1133 for(;;) {
b7b8fc34 1134 if (url_interrupt_cb())
8b1ab7bf 1135 return -1;
1617ad97
FB
1136 FD_ZERO(&rfds);
1137 fd_max = -1;
8b1ab7bf
FB
1138 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1139 rtsp_st = rt->rtsp_streams[i];
1617ad97 1140 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1141 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1142 if (fd1 > fd_max)
1143 fd_max = fd1;
1144 FD_SET(fd1, &rfds);
1145 }
1617ad97 1146 tv.tv_sec = 0;
b7b8fc34 1147 tv.tv_usec = 100 * 1000;
1617ad97
FB
1148 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1149 if (n > 0) {
8b1ab7bf
FB
1150 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1151 rtsp_st = rt->rtsp_streams[i];
1152 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1153 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1154 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1155 if (ret > 0) {
1156 *prtsp_st = rtsp_st;
1617ad97
FB
1157 return ret;
1158 }
1159 }
1160 }
1161 }
1162 }
1163}
1164
1165static int rtsp_read_packet(AVFormatContext *s,
1166 AVPacket *pkt)
1167{
1168 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1169 RTSPStream *rtsp_st;
1170 int ret, len;
1171 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1172
1173 /* get next frames from the same RTP packet */
1174 if (rt->cur_rtp) {
1175 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1176 if (ret == 0) {
1177 rt->cur_rtp = NULL;
1178 return 0;
1179 } else if (ret == 1) {
1180 return 0;
1181 } else {
1182 rt->cur_rtp = NULL;
1183 }
1184 }
1617ad97 1185
8b1ab7bf
FB
1186 /* read next RTP packet */
1187 redo:
1617ad97
FB
1188 switch(rt->protocol) {
1189 default:
1190 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1191 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1192 break;
1193 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1194 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1195 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
dbf30963
T
1196 if (rtsp_st->rtp_ctx)
1197 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1198 break;
1199 }
8b1ab7bf
FB
1200 if (len < 0)
1201 return AVERROR_IO;
1202 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1203 if (ret < 0)
1204 goto redo;
1205 if (ret == 1) {
1206 /* more packets may follow, so we save the RTP context */
1207 rt->cur_rtp = rtsp_st->rtp_ctx;
1208 }
1209 return 0;
1617ad97
FB
1210}
1211
ff762d6e 1212static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1213{
ff762d6e 1214 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1215 RTSPHeader reply1, *reply = &reply1;
1216 char cmd[1024];
1217
bc874dae 1218 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1219
1220 if (rt->state == RTSP_STATE_PAUSED) {
115329f1 1221 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1222 "PLAY %s RTSP/1.0\r\n",
1223 s->filename);
1224 } else {
115329f1 1225 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1226 "PLAY %s RTSP/1.0\r\n"
1227 "Range: npt=%0.3f-\r\n",
1228 s->filename,
1229 (double)rt->seek_timestamp / AV_TIME_BASE);
1230 }
b7b8fc34
FB
1231 rtsp_send_cmd(s, cmd, reply, NULL);
1232 if (reply->status_code != RTSP_STATUS_OK) {
1233 return -1;
1234 } else {
ff762d6e 1235 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1236 return 0;
1237 }
1238}
1239
ff762d6e
FB
1240/* pause the stream */
1241static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1242{
ff762d6e 1243 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1244 RTSPHeader reply1, *reply = &reply1;
1245 char cmd[1024];
1246
b7b8fc34 1247 rt = s->priv_data;
115329f1 1248
ff762d6e
FB
1249 if (rt->state != RTSP_STATE_PLAYING)
1250 return 0;
1251
115329f1 1252 snprintf(cmd, sizeof(cmd),
ff762d6e 1253 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1254 s->filename);
1255 rtsp_send_cmd(s, cmd, reply, NULL);
1256 if (reply->status_code != RTSP_STATUS_OK) {
1257 return -1;
1258 } else {
ff762d6e 1259 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1260 return 0;
1261 }
1262}
1263
115329f1 1264static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1265 int64_t timestamp, int flags)
ff762d6e
FB
1266{
1267 RTSPState *rt = s->priv_data;
115329f1 1268
ff762d6e
FB
1269 rt->seek_timestamp = timestamp;
1270 switch(rt->state) {
1271 default:
1272 case RTSP_STATE_IDLE:
1273 break;
1274 case RTSP_STATE_PLAYING:
1275 if (rtsp_read_play(s) != 0)
1276 return -1;
1277 break;
1278 case RTSP_STATE_PAUSED:
1279 rt->state = RTSP_STATE_IDLE;
1280 break;
1281 }
1282 return 0;
1283}
1284
1617ad97
FB
1285static int rtsp_read_close(AVFormatContext *s)
1286{
1287 RTSPState *rt = s->priv_data;
1617ad97 1288 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1289 char cmd[1024];
1290
b6892136 1291#if 0
1617ad97
FB
1292 /* NOTE: it is valid to flush the buffer here */
1293 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1294 url_fclose(&rt->rtsp_gb);
1295 }
b6892136 1296#endif
115329f1 1297 snprintf(cmd, sizeof(cmd),
b6892136 1298 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1299 s->filename);
1300 rtsp_send_cmd(s, cmd, reply, NULL);
1301
8b1ab7bf 1302 rtsp_close_streams(rt);
1617ad97
FB
1303 url_close(rt->rtsp_hd);
1304 return 0;
1305}
1306
96862926 1307#ifdef CONFIG_RTSP_DEMUXER
d2a067d1 1308AVInputFormat rtsp_demuxer = {
1617ad97
FB
1309 "rtsp",
1310 "RTSP input format",
1311 sizeof(RTSPState),
1312 rtsp_probe,
1313 rtsp_read_header,
1314 rtsp_read_packet,
1315 rtsp_read_close,
ff762d6e 1316 rtsp_read_seek,
bb76a117 1317 .flags = AVFMT_NOFILE,
ff762d6e
FB
1318 .read_play = rtsp_read_play,
1319 .read_pause = rtsp_read_pause,
1617ad97 1320};
96862926 1321#endif
1617ad97 1322
cb1fdc61 1323static int sdp_probe(AVProbeData *p1)
93ced3e8 1324{
0e1ceacd 1325 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1326
1327 /* we look for a line beginning "c=IN IP4" */
0e1ceacd
MN
1328 while (p < p_end && *p != '\0') {
1329 if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL))
cb1fdc61 1330 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1331
1332 while(p < p_end - 1 && *p != '\n') p++;
1333 if (++p >= p_end)
cb1fdc61 1334 break;
cb1fdc61
FB
1335 if (*p == '\r')
1336 p++;
1337 }
93ced3e8
FB
1338 return 0;
1339}
1340
1341#define SDP_MAX_SIZE 8192
1342
1343static int sdp_read_header(AVFormatContext *s,
1344 AVFormatParameters *ap)
1345{
8b1ab7bf 1346 RTSPState *rt = s->priv_data;
93ced3e8
FB
1347 RTSPStream *rtsp_st;
1348 int size, i, err;
1349 char *content;
1350 char url[1024];
8b1ab7bf 1351 AVStream *st;
93ced3e8
FB
1352
1353 /* read the whole sdp file */
1354 /* XXX: better loading */
1355 content = av_malloc(SDP_MAX_SIZE);
1356 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1357 if (size <= 0) {
1358 av_free(content);
1359 return AVERROR_INVALIDDATA;
1360 }
1361 content[size] ='\0';
1362
1363 sdp_parse(s, content);
1364 av_free(content);
1365
1366 /* open each RTP stream */
8b1ab7bf
FB
1367 for(i=0;i<rt->nb_rtsp_streams;i++) {
1368 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1369
1370 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1371 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8
FB
1372 rtsp_st->sdp_port,
1373 rtsp_st->sdp_ttl);
dbf30963 1374 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1375 err = AVERROR_INVALIDDATA;
1376 goto fail;
1377 }
8b1ab7bf
FB
1378 /* open the RTP context */
1379 st = NULL;
1380 if (rtsp_st->stream_index >= 0)
1381 st = s->streams[rtsp_st->stream_index];
1382 if (!st)
1383 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1384 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
8b1ab7bf
FB
1385 if (!rtsp_st->rtp_ctx) {
1386 err = AVERROR_NOMEM;
1387 goto fail;
4934884a
RM
1388 } else {
1389 if(rtsp_st->dynamic_handler) {
1390 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1391 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1392 }
8b1ab7bf 1393 }
93ced3e8
FB
1394 }
1395 return 0;
1396 fail:
8b1ab7bf 1397 rtsp_close_streams(rt);
93ced3e8
FB
1398 return err;
1399}
1400
1401static int sdp_read_packet(AVFormatContext *s,
1402 AVPacket *pkt)
1403{
8b1ab7bf 1404 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1405}
1406
1407static int sdp_read_close(AVFormatContext *s)
1408{
8b1ab7bf
FB
1409 RTSPState *rt = s->priv_data;
1410 rtsp_close_streams(rt);
93ced3e8
FB
1411 return 0;
1412}
1413
ff70e601
MR
1414#ifdef CONFIG_SDP_DEMUXER
1415AVInputFormat sdp_demuxer = {
93ced3e8
FB
1416 "sdp",
1417 "SDP",
1418 sizeof(RTSPState),
1419 sdp_probe,
1420 sdp_read_header,
1421 sdp_read_packet,
1422 sdp_read_close,
1423};
ff70e601 1424#endif
93ced3e8 1425
e7047005 1426#ifdef CONFIG_REDIR_DEMUXER
1617ad97
FB
1427/* dummy redirector format (used directly in av_open_input_file now) */
1428static int redir_probe(AVProbeData *pd)
1429{
1430 const char *p;
1431 p = pd->buf;
1432 while (redir_isspace(*p))
1433 p++;
1434 if (strstart(p, "http://", NULL) ||
1435 strstart(p, "rtsp://", NULL))
1436 return AVPROBE_SCORE_MAX;
1437 return 0;
1438}
1439
1440/* called from utils.c */
1441int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1442{
1443 char buf[4096], *q;
1444 int c;
1445 AVFormatContext *ic = NULL;
1446
1447 /* parse each URL and try to open it */
1448 c = url_fgetc(f);
1449 while (c != URL_EOF) {
1450 /* skip spaces */
1451 for(;;) {
1452 if (!redir_isspace(c))
1453 break;
1454 c = url_fgetc(f);
1455 }
1456 if (c == URL_EOF)
1457 break;
1458 /* record url */
1459 q = buf;
1460 for(;;) {
1461 if (c == URL_EOF || redir_isspace(c))
1462 break;
1463 if ((q - buf) < sizeof(buf) - 1)
1464 *q++ = c;
1465 c = url_fgetc(f);
1466 }
1467 *q = '\0';
1468 //printf("URL='%s'\n", buf);
1469 /* try to open the media file */
1470 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1471 break;
1472 }
1473 *ic_ptr = ic;
1474 if (!ic)
1475 return AVERROR_IO;
1476 else
1477 return 0;
1478}
1479
d2a067d1 1480AVInputFormat redir_demuxer = {
1617ad97
FB
1481 "redir",
1482 "Redirector format",
1483 0,
1484 redir_probe,
1485 NULL,
1486 NULL,
1487 NULL,
1488};
e7047005 1489#endif