useless as this file wont be compiled if this is not true
[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 *
b78e7197
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5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
1617ad97
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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
438fcb75 23#include <unistd.h> /* for select() prototype */
1617ad97 24#include <sys/time.h>
b8a78f41 25#include <netinet/in.h>
1617ad97 26#include <sys/socket.h>
e9d511dc 27#include <arpa/inet.h>
1617ad97 28
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29#include "rtp_internal.h"
30
1617ad97 31//#define DEBUG
b6892136 32//#define DEBUG_RTP_TCP
1617ad97 33
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34enum RTSPClientState {
35 RTSP_STATE_IDLE,
36 RTSP_STATE_PLAYING,
37 RTSP_STATE_PAUSED,
38};
39
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40typedef struct RTSPState {
41 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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42 int nb_rtsp_streams;
43 struct RTSPStream **rtsp_streams;
115329f1 44
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45 enum RTSPClientState state;
46 int64_t seek_timestamp;
115329f1 47
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48 /* XXX: currently we use unbuffered input */
49 // ByteIOContext rtsp_gb;
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50 int seq; /* RTSP command sequence number */
51 char session_id[512];
52 enum RTSPProtocol protocol;
53 char last_reply[2048]; /* XXX: allocate ? */
8b1ab7bf 54 RTPDemuxContext *cur_rtp;
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55} RTSPState;
56
57typedef struct RTSPStream {
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58 URLContext *rtp_handle; /* RTP stream handle */
59 RTPDemuxContext *rtp_ctx; /* RTP parse context */
115329f1 60
8b1ab7bf 61 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
1617ad97 62 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
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63 char control_url[1024]; /* url for this stream (from SDP) */
64
65 int sdp_port; /* port (from SDP content - not used in RTSP) */
66 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
67 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
68 int sdp_payload_type; /* payload type - only used in SDP */
d1ccf0e0 69 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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70
71 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
72 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
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73} RTSPStream;
74
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75static int rtsp_read_play(AVFormatContext *s);
76
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77/* XXX: currently, the only way to change the protocols consists in
78 changing this variable */
1617ad97 79
d1ccf0e0 80int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
85fb7b34 81
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82FFRTSPCallback *ff_rtsp_callback = NULL;
83
84static int rtsp_probe(AVProbeData *p)
85{
86 if (strstart(p->filename, "rtsp:", NULL))
87 return AVPROBE_SCORE_MAX;
88 return 0;
89}
90
91static int redir_isspace(int c)
92{
93 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
94}
95
96static void skip_spaces(const char **pp)
97{
98 const char *p;
99 p = *pp;
100 while (redir_isspace(*p))
101 p++;
102 *pp = p;
103}
104
115329f1 105static void get_word_sep(char *buf, int buf_size, const char *sep,
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106 const char **pp)
107{
108 const char *p;
109 char *q;
110
111 p = *pp;
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112 if (*p == '/')
113 p++;
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114 skip_spaces(&p);
115 q = buf;
116 while (!strchr(sep, *p) && *p != '\0') {
117 if ((q - buf) < buf_size - 1)
118 *q++ = *p;
119 p++;
120 }
121 if (buf_size > 0)
122 *q = '\0';
123 *pp = p;
124}
125
126static void get_word(char *buf, int buf_size, const char **pp)
127{
128 const char *p;
129 char *q;
130
131 p = *pp;
132 skip_spaces(&p);
133 q = buf;
134 while (!redir_isspace(*p) && *p != '\0') {
135 if ((q - buf) < buf_size - 1)
136 *q++ = *p;
137 p++;
138 }
139 if (buf_size > 0)
140 *q = '\0';
141 *pp = p;
142}
143
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144/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
145 params>] */
4934884a 146static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
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147{
148 char buf[256];
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149 int i;
150 AVCodec *c;
7b49ce2e 151 const char *c_name;
93ced3e8 152
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153 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
154 see if we can handle this kind of payload */
93ced3e8 155 get_word_sep(buf, sizeof(buf), "/", &p);
d1ccf0e0 156 if (payload_type >= RTP_PT_PRIVATE) {
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157 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
158 while(handler) {
159 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
160 codec->codec_id = handler->codec_id;
161 rtsp_st->dynamic_handler= handler;
162 if(handler->open) {
163 rtsp_st->dynamic_protocol_context= handler->open();
164 }
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165 break;
166 }
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167 handler= handler->next;
168 }
93ced3e8 169 } else {
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170 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
171 /* search into AVRtpPayloadTypes[] */
172 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
173 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
174 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
175 break;
176 }
177 }
178
179 c = avcodec_find_decoder(codec->codec_id);
180 if (c && c->name)
7b49ce2e 181 c_name = c->name;
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182 else
183 c_name = (char *)NULL;
184
185 if (c_name) {
186 get_word_sep(buf, sizeof(buf), "/", &p);
187 i = atoi(buf);
188 switch (codec->codec_type) {
189 case CODEC_TYPE_AUDIO:
190 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
191 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
192 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
193 if (i > 0) {
194 codec->sample_rate = i;
195 get_word_sep(buf, sizeof(buf), "/", &p);
196 i = atoi(buf);
197 if (i > 0)
198 codec->channels = i;
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199 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
200 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
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201 }
202 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
203 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
204 break;
205 case CODEC_TYPE_VIDEO:
206 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
207 break;
208 default:
209 break;
210 }
211 return 0;
93ced3e8 212 }
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213
214 return -1;
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215}
216
217/* return the length and optionnaly the data */
218static int hex_to_data(uint8_t *data, const char *p)
219{
220 int c, len, v;
221
222 len = 0;
223 v = 1;
224 for(;;) {
225 skip_spaces(&p);
226 if (p == '\0')
227 break;
228 c = toupper((unsigned char)*p++);
229 if (c >= '0' && c <= '9')
230 c = c - '0';
231 else if (c >= 'A' && c <= 'F')
232 c = c - 'A' + 10;
233 else
234 break;
235 v = (v << 4) | c;
236 if (v & 0x100) {
237 if (data)
238 data[len] = v;
239 len++;
240 v = 1;
241 }
242 }
243 return len;
244}
245
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246static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
247{
248 switch (codec->codec_id) {
249 case CODEC_ID_MPEG4:
cbee7a69 250 case CODEC_ID_AAC:
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251 if (!strcmp(attr, "config")) {
252 /* decode the hexa encoded parameter */
253 int len = hex_to_data(NULL, value);
254 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
255 if (!codec->extradata)
256 return;
257 codec->extradata_size = len;
258 hex_to_data(codec->extradata, value);
259 }
260 break;
261 default:
262 break;
263 }
264 return;
265}
266
267typedef struct attrname_map
268{
7b49ce2e 269 const char *str;
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270 uint16_t type;
271 uint32_t offset;
272} attrname_map_t;
273
274/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
275#define ATTR_NAME_TYPE_INT 0
276#define ATTR_NAME_TYPE_STR 1
277static attrname_map_t attr_names[]=
278{
279 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
280 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
281 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
282 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
283 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
284 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
285 {NULL, -1, -1},
286};
287
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288/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
289* because it is used in rtp_h264.c, which is forthcoming.
290*/
291int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
292{
293 skip_spaces(p);
294 if(**p)
295 {
296 get_word_sep(attr, attr_size, "=", p);
297 if (**p == '=')
298 (*p)++;
299 get_word_sep(value, value_size, ";", p);
300 if (**p == ';')
301 (*p)++;
302 return 1;
303 }
304 return 0;
305}
306
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307/* parse a SDP line and save stream attributes */
308static void sdp_parse_fmtp(AVStream *st, const char *p)
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309{
310 char attr[256];
311 char value[4096];
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312 int i;
313
314 RTSPStream *rtsp_st = st->priv_data;
01f4895c 315 AVCodecContext *codec = st->codec;
d1ccf0e0 316 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
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317
318 /* loop on each attribute */
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RM
319 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
320 {
bb270c08 321 /* grab the codec extra_data from the config parameter of the fmtp line */
d1ccf0e0
RD
322 sdp_parse_fmtp_config(codec, attr, value);
323 /* Looking for a known attribute */
324 for (i = 0; attr_names[i].str; ++i) {
325 if (!strcasecmp(attr, attr_names[i].str)) {
326 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
327 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
328 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
329 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
bb270c08 330 }
93ced3e8 331 }
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332 }
333}
334
31693e00
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335/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
336 * and end time.
337 * Used for seeking in the rtp stream.
338 */
339static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
340{
341 char buf[256];
342
343 skip_spaces(&p);
344 if (!stristart(p, "npt=", &p))
345 return;
346
347 *start = AV_NOPTS_VALUE;
348 *end = AV_NOPTS_VALUE;
349
350 get_word_sep(buf, sizeof(buf), "-", &p);
351 *start = parse_date(buf, 1);
352 if (*p == '-') {
353 p++;
354 get_word_sep(buf, sizeof(buf), "-", &p);
355 *end = parse_date(buf, 1);
356 }
357// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
358// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
359}
360
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361typedef struct SDPParseState {
362 /* SDP only */
363 struct in_addr default_ip;
364 int default_ttl;
365} SDPParseState;
366
367static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
1617ad97
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368 int letter, const char *buf)
369{
8b1ab7bf 370 RTSPState *rt = s->priv_data;
1617ad97
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371 char buf1[64], st_type[64];
372 const char *p;
93ced3e8 373 int codec_type, payload_type, i;
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374 AVStream *st;
375 RTSPStream *rtsp_st;
93ced3e8
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376 struct in_addr sdp_ip;
377 int ttl;
378
1617ad97
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379#ifdef DEBUG
380 printf("sdp: %c='%s'\n", letter, buf);
381#endif
382
383 p = buf;
384 switch(letter) {
93ced3e8
FB
385 case 'c':
386 get_word(buf1, sizeof(buf1), &p);
387 if (strcmp(buf1, "IN") != 0)
388 return;
389 get_word(buf1, sizeof(buf1), &p);
390 if (strcmp(buf1, "IP4") != 0)
391 return;
392 get_word_sep(buf1, sizeof(buf1), "/", &p);
393 if (inet_aton(buf1, &sdp_ip) == 0)
394 return;
395 ttl = 16;
396 if (*p == '/') {
397 p++;
398 get_word_sep(buf1, sizeof(buf1), "/", &p);
399 ttl = atoi(buf1);
400 }
401 if (s->nb_streams == 0) {
402 s1->default_ip = sdp_ip;
403 s1->default_ttl = ttl;
404 } else {
405 st = s->streams[s->nb_streams - 1];
406 rtsp_st = st->priv_data;
407 rtsp_st->sdp_ip = sdp_ip;
408 rtsp_st->sdp_ttl = ttl;
409 }
410 break;
1617ad97
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411 case 's':
412 pstrcpy(s->title, sizeof(s->title), p);
413 break;
414 case 'i':
415 if (s->nb_streams == 0) {
416 pstrcpy(s->comment, sizeof(s->comment), p);
417 break;
418 }
419 break;
420 case 'm':
421 /* new stream */
422 get_word(st_type, sizeof(st_type), &p);
423 if (!strcmp(st_type, "audio")) {
424 codec_type = CODEC_TYPE_AUDIO;
425 } else if (!strcmp(st_type, "video")) {
426 codec_type = CODEC_TYPE_VIDEO;
427 } else {
428 return;
429 }
1617ad97
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430 rtsp_st = av_mallocz(sizeof(RTSPStream));
431 if (!rtsp_st)
432 return;
8b1ab7bf
FB
433 rtsp_st->stream_index = -1;
434 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
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435
436 rtsp_st->sdp_ip = s1->default_ip;
437 rtsp_st->sdp_ttl = s1->default_ttl;
438
93ced3e8
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439 get_word(buf1, sizeof(buf1), &p); /* port */
440 rtsp_st->sdp_port = atoi(buf1);
441
442 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 443
93ced3e8
FB
444 /* XXX: handle list of formats */
445 get_word(buf1, sizeof(buf1), &p); /* format list */
446 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 447
d1ccf0e0 448 if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
8b1ab7bf
FB
449 /* no corresponding stream */
450 } else {
451 st = av_new_stream(s, 0);
452 if (!st)
453 return;
454 st->priv_data = rtsp_st;
455 rtsp_st->stream_index = st->index;
01f4895c 456 st->codec->codec_type = codec_type;
d1ccf0e0 457 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 458 /* if standard payload type, we can find the codec right now */
01f4895c 459 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
460 }
461 }
1617ad97
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462 /* put a default control url */
463 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
1617ad97
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464 break;
465 case 'a':
466 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
467 char proto[32];
468 /* get the control url */
469 st = s->streams[s->nb_streams - 1];
470 rtsp_st = st->priv_data;
115329f1 471
1617ad97 472 /* XXX: may need to add full url resolution */
6ba5cbc6 473 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
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FB
474 if (proto[0] == '\0') {
475 /* relative control URL */
476 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
477 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
478 } else {
479 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
480 }
93ced3e8
FB
481 } else if (strstart(p, "rtpmap:", &p)) {
482 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 483 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
484 payload_type = atoi(buf1);
485 for(i = 0; i < s->nb_streams;i++) {
486 st = s->streams[i];
487 rtsp_st = st->priv_data;
488 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a 489 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
93ced3e8
FB
490 }
491 }
492 } else if (strstart(p, "fmtp:", &p)) {
493 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 494 get_word(buf1, sizeof(buf1), &p);
93ced3e8
FB
495 payload_type = atoi(buf1);
496 for(i = 0; i < s->nb_streams;i++) {
497 st = s->streams[i];
498 rtsp_st = st->priv_data;
499 if (rtsp_st->sdp_payload_type == payload_type) {
4934884a
RM
500 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
501 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
502 sdp_parse_fmtp(st, p);
503 }
504 } else {
ed787542 505 sdp_parse_fmtp(st, p);
4934884a 506 }
93ced3e8
FB
507 }
508 }
d0deedcb
RM
509 } else if(strstart(p, "framesize:", &p)) {
510 // let dynamic protocol handlers have a stab at the line.
511 get_word(buf1, sizeof(buf1), &p);
512 payload_type = atoi(buf1);
513 for(i = 0; i < s->nb_streams;i++) {
514 st = s->streams[i];
515 rtsp_st = st->priv_data;
516 if (rtsp_st->sdp_payload_type == payload_type) {
517 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
518 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
519 }
520 }
521 }
31693e00
RM
522 } else if(strstart(p, "range:", &p)) {
523 int64_t start, end;
524
525 // this is so that seeking on a streamed file can work.
526 rtsp_parse_range_npt(p, &start, &end);
527 s->start_time= start;
528 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
1617ad97
FB
529 }
530 break;
531 }
532}
533
5c91a675 534static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
535{
536 const char *p;
537 int letter;
538 char buf[1024], *q;
93ced3e8 539 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 540
93ced3e8 541 memset(s1, 0, sizeof(SDPParseState));
1617ad97
FB
542 p = content;
543 for(;;) {
544 skip_spaces(&p);
545 letter = *p;
546 if (letter == '\0')
547 break;
548 p++;
549 if (*p != '=')
550 goto next_line;
551 p++;
552 /* get the content */
553 q = buf;
b6892136 554 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
555 if ((q - buf) < sizeof(buf) - 1)
556 *q++ = *p;
557 p++;
558 }
559 *q = '\0';
93ced3e8 560 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
561 next_line:
562 while (*p != '\n' && *p != '\0')
563 p++;
564 if (*p == '\n')
565 p++;
566 }
567 return 0;
568}
569
570static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
571{
572 const char *p;
573 int v;
574
575 p = *pp;
576 skip_spaces(&p);
577 v = strtol(p, (char **)&p, 10);
578 if (*p == '-') {
579 p++;
580 *min_ptr = v;
581 v = strtol(p, (char **)&p, 10);
582 *max_ptr = v;
583 } else {
584 *min_ptr = v;
585 *max_ptr = v;
586 }
587 *pp = p;
588}
589
590/* XXX: only one transport specification is parsed */
591static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
592{
593 char transport_protocol[16];
594 char profile[16];
595 char lower_transport[16];
596 char parameter[16];
597 RTSPTransportField *th;
598 char buf[256];
115329f1 599
1617ad97 600 reply->nb_transports = 0;
115329f1 601
1617ad97
FB
602 for(;;) {
603 skip_spaces(&p);
604 if (*p == '\0')
605 break;
606
607 th = &reply->transports[reply->nb_transports];
608
115329f1 609 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97
FB
610 "/", &p);
611 if (*p == '/')
612 p++;
613 get_word_sep(profile, sizeof(profile), "/;,", &p);
614 lower_transport[0] = '\0';
615 if (*p == '/') {
b6892136 616 p++;
115329f1 617 get_word_sep(lower_transport, sizeof(lower_transport),
1617ad97
FB
618 ";,", &p);
619 }
b6892136 620 if (!strcasecmp(lower_transport, "TCP"))
1617ad97
FB
621 th->protocol = RTSP_PROTOCOL_RTP_TCP;
622 else
623 th->protocol = RTSP_PROTOCOL_RTP_UDP;
115329f1 624
1617ad97
FB
625 if (*p == ';')
626 p++;
627 /* get each parameter */
628 while (*p != '\0' && *p != ',') {
629 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
630 if (!strcmp(parameter, "port")) {
631 if (*p == '=') {
632 p++;
633 rtsp_parse_range(&th->port_min, &th->port_max, &p);
634 }
635 } else if (!strcmp(parameter, "client_port")) {
636 if (*p == '=') {
637 p++;
115329f1 638 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
639 &th->client_port_max, &p);
640 }
641 } else if (!strcmp(parameter, "server_port")) {
642 if (*p == '=') {
643 p++;
115329f1 644 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
645 &th->server_port_max, &p);
646 }
647 } else if (!strcmp(parameter, "interleaved")) {
648 if (*p == '=') {
649 p++;
115329f1 650 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
651 &th->interleaved_max, &p);
652 }
653 } else if (!strcmp(parameter, "multicast")) {
654 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
655 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
656 } else if (!strcmp(parameter, "ttl")) {
657 if (*p == '=') {
658 p++;
659 th->ttl = strtol(p, (char **)&p, 10);
660 }
661 } else if (!strcmp(parameter, "destination")) {
662 struct in_addr ipaddr;
663
664 if (*p == '=') {
665 p++;
666 get_word_sep(buf, sizeof(buf), ";,", &p);
115329f1 667 if (inet_aton(buf, &ipaddr))
1617ad97
FB
668 th->destination = ntohl(ipaddr.s_addr);
669 }
670 }
671 while (*p != ';' && *p != '\0' && *p != ',')
672 p++;
673 if (*p == ';')
674 p++;
675 }
676 if (*p == ',')
677 p++;
678
679 reply->nb_transports++;
680 }
681}
682
683void rtsp_parse_line(RTSPHeader *reply, const char *buf)
684{
685 const char *p;
686
687 /* NOTE: we do case independent match for broken servers */
688 p = buf;
689 if (stristart(p, "Session:", &p)) {
690 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
691 } else if (stristart(p, "Content-Length:", &p)) {
692 reply->content_length = strtol(p, NULL, 10);
693 } else if (stristart(p, "Transport:", &p)) {
694 rtsp_parse_transport(reply, p);
695 } else if (stristart(p, "CSeq:", &p)) {
696 reply->seq = strtol(p, NULL, 10);
ff762d6e 697 } else if (stristart(p, "Range:", &p)) {
31693e00 698 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
1617ad97
FB
699 }
700}
701
2a42b5c3
LS
702static int url_readbuf(URLContext *h, unsigned char *buf, int size)
703{
704 int ret, len;
705
706 len = 0;
707 while (len < size) {
708 ret = url_read(h, buf+len, size-len);
709 if (ret < 1)
710 return ret;
711 len += ret;
712 }
713 return len;
714}
715
b7b8fc34
FB
716/* skip a RTP/TCP interleaved packet */
717static void rtsp_skip_packet(AVFormatContext *s)
718{
719 RTSPState *rt = s->priv_data;
720 int ret, len, len1;
721 uint8_t buf[1024];
722
2a42b5c3 723 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
724 if (ret != 3)
725 return;
726 len = (buf[1] << 8) | buf[2];
727#ifdef DEBUG
728 printf("skipping RTP packet len=%d\n", len);
729#endif
730 /* skip payload */
731 while (len > 0) {
732 len1 = len;
733 if (len1 > sizeof(buf))
734 len1 = sizeof(buf);
2a42b5c3 735 ret = url_readbuf(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
736 if (ret != len1)
737 return;
738 len -= len1;
739 }
740}
1617ad97 741
115329f1
DB
742static void rtsp_send_cmd(AVFormatContext *s,
743 const char *cmd, RTSPHeader *reply,
1617ad97
FB
744 unsigned char **content_ptr)
745{
746 RTSPState *rt = s->priv_data;
747 char buf[4096], buf1[1024], *q;
748 unsigned char ch;
749 const char *p;
750 int content_length, line_count;
751 unsigned char *content = NULL;
752
753 memset(reply, 0, sizeof(RTSPHeader));
754
755 rt->seq++;
756 pstrcpy(buf, sizeof(buf), cmd);
b6892136 757 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1617ad97
FB
758 pstrcat(buf, sizeof(buf), buf1);
759 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
b6892136 760 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
1617ad97
FB
761 pstrcat(buf, sizeof(buf), buf1);
762 }
b6892136 763 pstrcat(buf, sizeof(buf), "\r\n");
1617ad97
FB
764#ifdef DEBUG
765 printf("Sending:\n%s--\n", buf);
766#endif
767 url_write(rt->rtsp_hd, buf, strlen(buf));
768
769 /* parse reply (XXX: use buffers) */
770 line_count = 0;
771 rt->last_reply[0] = '\0';
772 for(;;) {
773 q = buf;
774 for(;;) {
2a42b5c3 775 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
1617ad97
FB
776 break;
777 if (ch == '\n')
778 break;
b7b8fc34
FB
779 if (ch == '$') {
780 /* XXX: only parse it if first char on line ? */
781 rtsp_skip_packet(s);
782 } else if (ch != '\r') {
1617ad97
FB
783 if ((q - buf) < sizeof(buf) - 1)
784 *q++ = ch;
785 }
786 }
787 *q = '\0';
788#ifdef DEBUG
789 printf("line='%s'\n", buf);
790#endif
791 /* test if last line */
792 if (buf[0] == '\0')
793 break;
794 p = buf;
795 if (line_count == 0) {
796 /* get reply code */
797 get_word(buf1, sizeof(buf1), &p);
798 get_word(buf1, sizeof(buf1), &p);
799 reply->status_code = atoi(buf1);
800 } else {
801 rtsp_parse_line(reply, p);
802 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
803 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
804 }
805 line_count++;
806 }
115329f1 807
1617ad97
FB
808 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
809 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
115329f1 810
1617ad97
FB
811 content_length = reply->content_length;
812 if (content_length > 0) {
813 /* leave some room for a trailing '\0' (useful for simple parsing) */
814 content = av_malloc(content_length + 1);
2a42b5c3 815 (void)url_readbuf(rt->rtsp_hd, content, content_length);
1617ad97
FB
816 content[content_length] = '\0';
817 }
818 if (content_ptr)
819 *content_ptr = content;
820}
821
822/* useful for modules: set RTSP callback function */
823
824void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
825{
826 ff_rtsp_callback = rtsp_cb;
827}
828
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
FB
845 }
846 av_free(rtsp_st);
847 }
848 av_free(rt->rtsp_streams);
849}
850
1617ad97
FB
851static int rtsp_read_header(AVFormatContext *s,
852 AVFormatParameters *ap)
853{
854 RTSPState *rt = s->priv_data;
855 char host[1024], path[1024], tcpname[1024], cmd[2048];
856 URLContext *rtsp_hd;
d1ccf0e0 857 int port, i, j, ret, err;
1617ad97
FB
858 RTSPHeader reply1, *reply = &reply1;
859 unsigned char *content = NULL;
1617ad97
FB
860 RTSPStream *rtsp_st;
861 int protocol_mask;
8b1ab7bf 862 AVStream *st;
1617ad97 863
1617ad97 864 /* extract hostname and port */
6ba5cbc6 865 url_split(NULL, 0, NULL, 0,
1617ad97
FB
866 host, sizeof(host), &port, path, sizeof(path), s->filename);
867 if (port < 0)
868 port = RTSP_DEFAULT_PORT;
869
870 /* open the tcp connexion */
871 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
872 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
873 return AVERROR_IO;
874 rt->rtsp_hd = rtsp_hd;
875 rt->seq = 0;
115329f1 876
1617ad97 877 /* describe the stream */
115329f1 878 snprintf(cmd, sizeof(cmd),
b6892136
FB
879 "DESCRIBE %s RTSP/1.0\r\n"
880 "Accept: application/sdp\r\n",
1617ad97
FB
881 s->filename);
882 rtsp_send_cmd(s, cmd, reply, &content);
883 if (!content) {
884 err = AVERROR_INVALIDDATA;
885 goto fail;
886 }
887 if (reply->status_code != RTSP_STATUS_OK) {
888 err = AVERROR_INVALIDDATA;
889 goto fail;
890 }
115329f1 891
1617ad97
FB
892 /* now we got the SDP description, we parse it */
893 ret = sdp_parse(s, (const char *)content);
894 av_freep(&content);
895 if (ret < 0) {
896 err = AVERROR_INVALIDDATA;
897 goto fail;
898 }
115329f1 899
1617ad97
FB
900 protocol_mask = rtsp_default_protocols;
901
902 /* for each stream, make the setup request */
903 /* XXX: we assume the same server is used for the control of each
904 RTSP stream */
d1ccf0e0
RD
905
906 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
907 char transport[2048];
908
8b1ab7bf 909 rtsp_st = rt->rtsp_streams[i];
1617ad97
FB
910
911 /* compute available transports */
912 transport[0] = '\0';
913
914 /* RTP/UDP */
915 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
85fb7b34 916 char buf[256];
85fb7b34
FB
917
918 /* first try in specified port range */
d1ccf0e0
RD
919 if (RTSP_RTP_PORT_MIN != 0) {
920 while(j <= RTSP_RTP_PORT_MAX) {
85fb7b34 921 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
dbf30963 922 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
d1ccf0e0 923 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
85fb7b34 924 goto rtp_opened;
d1ccf0e0 925 }
85fb7b34 926 }
1617ad97 927 }
85fb7b34 928
d1ccf0e0
RD
929/* then try on any port
930** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
931** err = AVERROR_INVALIDDATA;
932** goto fail;
933** }
934*/
85fb7b34
FB
935
936 rtp_opened:
8b1ab7bf 937 port = rtp_get_local_port(rtsp_st->rtp_handle);
1617ad97
FB
938 if (transport[0] != '\0')
939 pstrcat(transport, sizeof(transport), ",");
940 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
941 "RTP/AVP/UDP;unicast;client_port=%d-%d",
942 port, port + 1);
943 }
944
945 /* RTP/TCP */
d1ccf0e0 946 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
1617ad97
FB
947 if (transport[0] != '\0')
948 pstrcat(transport, sizeof(transport), ",");
949 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
950 "RTP/AVP/TCP");
951 }
952
d1ccf0e0 953 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
1617ad97
FB
954 if (transport[0] != '\0')
955 pstrcat(transport, sizeof(transport), ",");
115329f1 956 snprintf(transport + strlen(transport),
1617ad97
FB
957 sizeof(transport) - strlen(transport) - 1,
958 "RTP/AVP/UDP;multicast");
959 }
115329f1 960 snprintf(cmd, sizeof(cmd),
b6892136
FB
961 "SETUP %s RTSP/1.0\r\n"
962 "Transport: %s\r\n",
1617ad97
FB
963 rtsp_st->control_url, transport);
964 rtsp_send_cmd(s, cmd, reply, NULL);
965 if (reply->status_code != RTSP_STATUS_OK ||
966 reply->nb_transports != 1) {
967 err = AVERROR_INVALIDDATA;
968 goto fail;
969 }
970
971 /* XXX: same protocol for all streams is required */
972 if (i > 0) {
973 if (reply->transports[0].protocol != rt->protocol) {
974 err = AVERROR_INVALIDDATA;
975 goto fail;
976 }
977 } else {
978 rt->protocol = reply->transports[0].protocol;
979 }
980
981 /* close RTP connection if not choosen */
982 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
983 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
8b1ab7bf
FB
984 url_close(rtsp_st->rtp_handle);
985 rtsp_st->rtp_handle = NULL;
1617ad97
FB
986 }
987
988 switch(reply->transports[0].protocol) {
989 case RTSP_PROTOCOL_RTP_TCP:
1617ad97
FB
990 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
991 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
992 break;
115329f1 993
1617ad97
FB
994 case RTSP_PROTOCOL_RTP_UDP:
995 {
996 char url[1024];
115329f1 997
1617ad97 998 /* XXX: also use address if specified */
115329f1 999 snprintf(url, sizeof(url), "rtp://%s:%d",
1617ad97 1000 host, reply->transports[0].server_port_min);
8b1ab7bf 1001 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1617ad97
FB
1002 err = AVERROR_INVALIDDATA;
1003 goto fail;
1004 }
1005 }
1006 break;
1007 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1008 {
1009 char url[1024];
1010 int ttl;
1011
1617ad97
FB
1012 ttl = reply->transports[0].ttl;
1013 if (!ttl)
1014 ttl = 16;
115329f1
DB
1015 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1016 host,
1617ad97
FB
1017 reply->transports[0].server_port_min,
1018 ttl);
dbf30963 1019 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1617ad97
FB
1020 err = AVERROR_INVALIDDATA;
1021 goto fail;
1022 }
1023 }
1024 break;
1025 }
8b1ab7bf
FB
1026 /* open the RTP context */
1027 st = NULL;
1028 if (rtsp_st->stream_index >= 0)
1029 st = s->streams[rtsp_st->stream_index];
1030 if (!st)
1031 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1032 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
d1ccf0e0 1033
8b1ab7bf
FB
1034 if (!rtsp_st->rtp_ctx) {
1035 err = AVERROR_NOMEM;
1036 goto fail;
4934884a
RM
1037 } else {
1038 if(rtsp_st->dynamic_handler) {
1039 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1040 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1041 }
8b1ab7bf 1042 }
1617ad97
FB
1043 }
1044
1045 /* use callback if available to extend setup */
1046 if (ff_rtsp_callback) {
115329f1 1047 if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
1617ad97
FB
1048 NULL, 0, rt->last_reply) < 0) {
1049 err = AVERROR_INVALIDDATA;
1050 goto fail;
1051 }
1052 }
115329f1 1053
1617ad97 1054
ff762d6e
FB
1055 rt->state = RTSP_STATE_IDLE;
1056 rt->seek_timestamp = 0; /* default is to start stream at position
1057 zero */
c04c3282 1058 if (ap->initial_pause) {
ff762d6e
FB
1059 /* do not start immediately */
1060 } else {
1061 if (rtsp_read_play(s) < 0) {
1062 err = AVERROR_INVALIDDATA;
1617ad97
FB
1063 goto fail;
1064 }
1065 }
1617ad97
FB
1066 return 0;
1067 fail:
8b1ab7bf 1068 rtsp_close_streams(rt);
1617ad97
FB
1069 av_freep(&content);
1070 url_close(rt->rtsp_hd);
1071 return err;
1072}
1073
8b1ab7bf
FB
1074static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1075 uint8_t *buf, int buf_size)
1617ad97
FB
1076{
1077 RTSPState *rt = s->priv_data;
b6892136 1078 int id, len, i, ret;
1617ad97 1079 RTSPStream *rtsp_st;
1617ad97 1080
b6892136
FB
1081#ifdef DEBUG_RTP_TCP
1082 printf("tcp_read_packet:\n");
1083#endif
1617ad97
FB
1084 redo:
1085 for(;;) {
2a42b5c3 1086 ret = url_readbuf(rt->rtsp_hd, buf, 1);
b6892136
FB
1087#ifdef DEBUG_RTP_TCP
1088 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1089#endif
1090 if (ret != 1)
8b1ab7bf 1091 return -1;
b6892136 1092 if (buf[0] == '$')
1617ad97
FB
1093 break;
1094 }
2a42b5c3 1095 ret = url_readbuf(rt->rtsp_hd, buf, 3);
b6892136 1096 if (ret != 3)
8b1ab7bf 1097 return -1;
b6892136
FB
1098 id = buf[0];
1099 len = (buf[1] << 8) | buf[2];
1100#ifdef DEBUG_RTP_TCP
1101 printf("id=%d len=%d\n", id, len);
1102#endif
8b1ab7bf 1103 if (len > buf_size || len < 12)
1617ad97
FB
1104 goto redo;
1105 /* get the data */
2a42b5c3 1106 ret = url_readbuf(rt->rtsp_hd, buf, len);
b6892136 1107 if (ret != len)
8b1ab7bf 1108 return -1;
115329f1 1109
1617ad97 1110 /* find the matching stream */
8b1ab7bf
FB
1111 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1112 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1113 if (id >= rtsp_st->interleaved_min &&
1114 id <= rtsp_st->interleaved_max)
1617ad97
FB
1115 goto found;
1116 }
1117 goto redo;
1118 found:
8b1ab7bf
FB
1119 *prtsp_st = rtsp_st;
1120 return len;
1617ad97
FB
1121}
1122
115329f1 1123static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
8b1ab7bf 1124 uint8_t *buf, int buf_size)
1617ad97 1125{
8b1ab7bf 1126 RTSPState *rt = s->priv_data;
1617ad97
FB
1127 RTSPStream *rtsp_st;
1128 fd_set rfds;
1129 int fd1, fd2, fd_max, n, i, ret;
1617ad97
FB
1130 struct timeval tv;
1131
1132 for(;;) {
b7b8fc34 1133 if (url_interrupt_cb())
8b1ab7bf 1134 return -1;
1617ad97
FB
1135 FD_ZERO(&rfds);
1136 fd_max = -1;
8b1ab7bf
FB
1137 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1138 rtsp_st = rt->rtsp_streams[i];
1617ad97 1139 /* currently, we cannot probe RTCP handle because of blocking restrictions */
8b1ab7bf 1140 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97
FB
1141 if (fd1 > fd_max)
1142 fd_max = fd1;
1143 FD_SET(fd1, &rfds);
1144 }
1617ad97 1145 tv.tv_sec = 0;
b7b8fc34 1146 tv.tv_usec = 100 * 1000;
1617ad97
FB
1147 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1148 if (n > 0) {
8b1ab7bf
FB
1149 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1150 rtsp_st = rt->rtsp_streams[i];
1151 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1617ad97 1152 if (FD_ISSET(fd1, &rfds)) {
8b1ab7bf
FB
1153 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1154 if (ret > 0) {
1155 *prtsp_st = rtsp_st;
1617ad97
FB
1156 return ret;
1157 }
1158 }
1159 }
1160 }
1161 }
1162}
1163
1164static int rtsp_read_packet(AVFormatContext *s,
1165 AVPacket *pkt)
1166{
1167 RTSPState *rt = s->priv_data;
8b1ab7bf
FB
1168 RTSPStream *rtsp_st;
1169 int ret, len;
1170 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1171
1172 /* get next frames from the same RTP packet */
1173 if (rt->cur_rtp) {
1174 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1175 if (ret == 0) {
1176 rt->cur_rtp = NULL;
1177 return 0;
1178 } else if (ret == 1) {
1179 return 0;
1180 } else {
1181 rt->cur_rtp = NULL;
1182 }
1183 }
1617ad97 1184
8b1ab7bf
FB
1185 /* read next RTP packet */
1186 redo:
1617ad97
FB
1187 switch(rt->protocol) {
1188 default:
1189 case RTSP_PROTOCOL_RTP_TCP:
8b1ab7bf 1190 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1617ad97
FB
1191 break;
1192 case RTSP_PROTOCOL_RTP_UDP:
8b1ab7bf
FB
1193 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1194 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
dbf30963
T
1195 if (rtsp_st->rtp_ctx)
1196 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1617ad97
FB
1197 break;
1198 }
8b1ab7bf
FB
1199 if (len < 0)
1200 return AVERROR_IO;
1201 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1202 if (ret < 0)
1203 goto redo;
1204 if (ret == 1) {
1205 /* more packets may follow, so we save the RTP context */
1206 rt->cur_rtp = rtsp_st->rtp_ctx;
1207 }
1208 return 0;
1617ad97
FB
1209}
1210
ff762d6e 1211static int rtsp_read_play(AVFormatContext *s)
b7b8fc34 1212{
ff762d6e 1213 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1214 RTSPHeader reply1, *reply = &reply1;
1215 char cmd[1024];
1216
bc874dae 1217 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
ff762d6e
FB
1218
1219 if (rt->state == RTSP_STATE_PAUSED) {
115329f1 1220 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1221 "PLAY %s RTSP/1.0\r\n",
1222 s->filename);
1223 } else {
115329f1 1224 snprintf(cmd, sizeof(cmd),
ff762d6e
FB
1225 "PLAY %s RTSP/1.0\r\n"
1226 "Range: npt=%0.3f-\r\n",
1227 s->filename,
1228 (double)rt->seek_timestamp / AV_TIME_BASE);
1229 }
b7b8fc34
FB
1230 rtsp_send_cmd(s, cmd, reply, NULL);
1231 if (reply->status_code != RTSP_STATUS_OK) {
1232 return -1;
1233 } else {
ff762d6e 1234 rt->state = RTSP_STATE_PLAYING;
b7b8fc34
FB
1235 return 0;
1236 }
1237}
1238
ff762d6e
FB
1239/* pause the stream */
1240static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1241{
ff762d6e 1242 RTSPState *rt = s->priv_data;
b7b8fc34
FB
1243 RTSPHeader reply1, *reply = &reply1;
1244 char cmd[1024];
1245
b7b8fc34 1246 rt = s->priv_data;
115329f1 1247
ff762d6e
FB
1248 if (rt->state != RTSP_STATE_PLAYING)
1249 return 0;
1250
115329f1 1251 snprintf(cmd, sizeof(cmd),
ff762d6e 1252 "PAUSE %s RTSP/1.0\r\n",
b7b8fc34
FB
1253 s->filename);
1254 rtsp_send_cmd(s, cmd, reply, NULL);
1255 if (reply->status_code != RTSP_STATUS_OK) {
1256 return -1;
1257 } else {
ff762d6e 1258 rt->state = RTSP_STATE_PAUSED;
b7b8fc34
FB
1259 return 0;
1260 }
1261}
1262
115329f1 1263static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1264 int64_t timestamp, int flags)
ff762d6e
FB
1265{
1266 RTSPState *rt = s->priv_data;
115329f1 1267
ff762d6e
FB
1268 rt->seek_timestamp = timestamp;
1269 switch(rt->state) {
1270 default:
1271 case RTSP_STATE_IDLE:
1272 break;
1273 case RTSP_STATE_PLAYING:
1274 if (rtsp_read_play(s) != 0)
1275 return -1;
1276 break;
1277 case RTSP_STATE_PAUSED:
1278 rt->state = RTSP_STATE_IDLE;
1279 break;
1280 }
1281 return 0;
1282}
1283
1617ad97
FB
1284static int rtsp_read_close(AVFormatContext *s)
1285{
1286 RTSPState *rt = s->priv_data;
1617ad97 1287 RTSPHeader reply1, *reply = &reply1;
1617ad97
FB
1288 char cmd[1024];
1289
b6892136 1290#if 0
1617ad97
FB
1291 /* NOTE: it is valid to flush the buffer here */
1292 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1293 url_fclose(&rt->rtsp_gb);
1294 }
b6892136 1295#endif
115329f1 1296 snprintf(cmd, sizeof(cmd),
b6892136 1297 "TEARDOWN %s RTSP/1.0\r\n",
1617ad97
FB
1298 s->filename);
1299 rtsp_send_cmd(s, cmd, reply, NULL);
1300
1301 if (ff_rtsp_callback) {
115329f1 1302 ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
1617ad97
FB
1303 NULL, 0, NULL);
1304 }
1305
8b1ab7bf 1306 rtsp_close_streams(rt);
1617ad97
FB
1307 url_close(rt->rtsp_hd);
1308 return 0;
1309}
1310
d2a067d1 1311AVInputFormat rtsp_demuxer = {
1617ad97
FB
1312 "rtsp",
1313 "RTSP input format",
1314 sizeof(RTSPState),
1315 rtsp_probe,
1316 rtsp_read_header,
1317 rtsp_read_packet,
1318 rtsp_read_close,
ff762d6e 1319 rtsp_read_seek,
bb76a117 1320 .flags = AVFMT_NOFILE,
ff762d6e
FB
1321 .read_play = rtsp_read_play,
1322 .read_pause = rtsp_read_pause,
1617ad97
FB
1323};
1324
cb1fdc61 1325static int sdp_probe(AVProbeData *p1)
93ced3e8 1326{
0e1ceacd 1327 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
1328
1329 /* we look for a line beginning "c=IN IP4" */
0e1ceacd
MN
1330 while (p < p_end && *p != '\0') {
1331 if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL))
cb1fdc61 1332 return AVPROBE_SCORE_MAX / 2;
0e1ceacd
MN
1333
1334 while(p < p_end - 1 && *p != '\n') p++;
1335 if (++p >= p_end)
cb1fdc61 1336 break;
cb1fdc61
FB
1337 if (*p == '\r')
1338 p++;
1339 }
93ced3e8
FB
1340 return 0;
1341}
1342
1343#define SDP_MAX_SIZE 8192
1344
1345static int sdp_read_header(AVFormatContext *s,
1346 AVFormatParameters *ap)
1347{
8b1ab7bf 1348 RTSPState *rt = s->priv_data;
93ced3e8
FB
1349 RTSPStream *rtsp_st;
1350 int size, i, err;
1351 char *content;
1352 char url[1024];
8b1ab7bf 1353 AVStream *st;
93ced3e8
FB
1354
1355 /* read the whole sdp file */
1356 /* XXX: better loading */
1357 content = av_malloc(SDP_MAX_SIZE);
1358 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1359 if (size <= 0) {
1360 av_free(content);
1361 return AVERROR_INVALIDDATA;
1362 }
1363 content[size] ='\0';
1364
1365 sdp_parse(s, content);
1366 av_free(content);
1367
1368 /* open each RTP stream */
8b1ab7bf
FB
1369 for(i=0;i<rt->nb_rtsp_streams;i++) {
1370 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1371
1372 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1373 inet_ntoa(rtsp_st->sdp_ip),
93ced3e8
FB
1374 rtsp_st->sdp_port,
1375 rtsp_st->sdp_ttl);
dbf30963 1376 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
1377 err = AVERROR_INVALIDDATA;
1378 goto fail;
1379 }
8b1ab7bf
FB
1380 /* open the RTP context */
1381 st = NULL;
1382 if (rtsp_st->stream_index >= 0)
1383 st = s->streams[rtsp_st->stream_index];
1384 if (!st)
1385 s->ctx_flags |= AVFMTCTX_NOHEADER;
dbf30963 1386 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
1387 if (!rtsp_st->rtp_ctx) {
1388 err = AVERROR_NOMEM;
1389 goto fail;
4934884a
RM
1390 } else {
1391 if(rtsp_st->dynamic_handler) {
1392 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1393 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1394 }
8b1ab7bf 1395 }
93ced3e8
FB
1396 }
1397 return 0;
1398 fail:
8b1ab7bf 1399 rtsp_close_streams(rt);
93ced3e8
FB
1400 return err;
1401}
1402
1403static int sdp_read_packet(AVFormatContext *s,
1404 AVPacket *pkt)
1405{
8b1ab7bf 1406 return rtsp_read_packet(s, pkt);
93ced3e8
FB
1407}
1408
1409static int sdp_read_close(AVFormatContext *s)
1410{
8b1ab7bf
FB
1411 RTSPState *rt = s->priv_data;
1412 rtsp_close_streams(rt);
93ced3e8
FB
1413 return 0;
1414}
1415
ff70e601
MR
1416#ifdef CONFIG_SDP_DEMUXER
1417AVInputFormat sdp_demuxer = {
93ced3e8
FB
1418 "sdp",
1419 "SDP",
1420 sizeof(RTSPState),
1421 sdp_probe,
1422 sdp_read_header,
1423 sdp_read_packet,
1424 sdp_read_close,
1425};
ff70e601 1426#endif
93ced3e8 1427
1617ad97
FB
1428/* dummy redirector format (used directly in av_open_input_file now) */
1429static int redir_probe(AVProbeData *pd)
1430{
1431 const char *p;
1432 p = pd->buf;
1433 while (redir_isspace(*p))
1434 p++;
1435 if (strstart(p, "http://", NULL) ||
1436 strstart(p, "rtsp://", NULL))
1437 return AVPROBE_SCORE_MAX;
1438 return 0;
1439}
1440
1441/* called from utils.c */
1442int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1443{
1444 char buf[4096], *q;
1445 int c;
1446 AVFormatContext *ic = NULL;
1447
1448 /* parse each URL and try to open it */
1449 c = url_fgetc(f);
1450 while (c != URL_EOF) {
1451 /* skip spaces */
1452 for(;;) {
1453 if (!redir_isspace(c))
1454 break;
1455 c = url_fgetc(f);
1456 }
1457 if (c == URL_EOF)
1458 break;
1459 /* record url */
1460 q = buf;
1461 for(;;) {
1462 if (c == URL_EOF || redir_isspace(c))
1463 break;
1464 if ((q - buf) < sizeof(buf) - 1)
1465 *q++ = c;
1466 c = url_fgetc(f);
1467 }
1468 *q = '\0';
1469 //printf("URL='%s'\n", buf);
1470 /* try to open the media file */
1471 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1472 break;
1473 }
1474 *ic_ptr = ic;
1475 if (!ic)
1476 return AVERROR_IO;
1477 else
1478 return 0;
1479}
1480
d2a067d1 1481AVInputFormat redir_demuxer = {
1617ad97
FB
1482 "redir",
1483 "Redirector format",
1484 0,
1485 redir_probe,
1486 NULL,
1487 NULL,
1488 NULL,
1489};