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