Make texi2pod.pl look for section "AUTHORS" rather than "AUTHOR", as
[libav.git] / libavformat / rtsp.c
CommitLineData
1617ad97 1/*
93ced3e8 2 * RTSP/SDP client
406792e7 3 * Copyright (c) 2002 Fabrice Bellard
1617ad97 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
FB
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
b78e7197 10 * version 2.1 of the License, or (at your option) any later version.
1617ad97 11 *
b78e7197 12 * FFmpeg is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
b78e7197 18 * License along with FFmpeg; if not, write to the Free Software
5509bffa 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1617ad97 20 */
245976da 21
f9337897 22#include "libavutil/base64.h"
245976da 23#include "libavutil/avstring.h"
6a5d31ac 24#include "libavutil/intreadwrite.h"
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25#include "avformat.h"
26
db0ed93e 27#include <sys/time.h>
b250f9c6 28#if HAVE_SYS_SELECT_H
933bd8e2 29#include <sys/select.h>
6ad1c9c9 30#endif
ea452b54 31#include <strings.h>
e4a9e3cc 32#include "internal.h"
42572ef5 33#include "network.h"
cbfa66d0 34#include "os_support.h"
c971ff19 35#include "rtsp.h"
1617ad97 36
302879cb 37#include "rtpdec.h"
e9dea59f 38#include "rdt.h"
f65919af 39#include "rtpdec_asf.h"
4934884a 40
1617ad97 41//#define DEBUG
b6892136 42//#define DEBUG_RTP_TCP
1617ad97 43
c482500f 44#if LIBAVFORMAT_VERSION_INT < (53 << 16)
90abbdba 45int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
c482500f 46#endif
85fb7b34 47
c2bfd816 48/* Timeout values for socket select, in ms,
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49 * and read_packet(), in seconds */
50#define SELECT_TIMEOUT_MS 100
51#define READ_PACKET_TIMEOUT_S 10
52#define MAX_TIMEOUTS READ_PACKET_TIMEOUT_S * 1000 / SELECT_TIMEOUT_MS
53
1ef36a70 54#define SPACE_CHARS " \t\r\n"
da1e126e
RB
55/* we use memchr() instead of strchr() here because strchr() will return
56 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
57#define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
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58static void skip_spaces(const char **pp)
59{
60 const char *p;
61 p = *pp;
62 while (redir_isspace(*p))
63 p++;
64 *pp = p;
65}
66
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67static void get_word_until_chars(char *buf, int buf_size,
68 const char *sep, const char **pp)
1617ad97
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69{
70 const char *p;
71 char *q;
72
73 p = *pp;
74 skip_spaces(&p);
75 q = buf;
76 while (!strchr(sep, *p) && *p != '\0') {
77 if ((q - buf) < buf_size - 1)
78 *q++ = *p;
79 p++;
80 }
81 if (buf_size > 0)
82 *q = '\0';
83 *pp = p;
84}
85
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86static void get_word_sep(char *buf, int buf_size, const char *sep,
87 const char **pp)
1617ad97 88{
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89 if (**pp == '/') (*pp)++;
90 get_word_until_chars(buf, buf_size, sep, pp);
91}
1617ad97 92
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93static void get_word(char *buf, int buf_size, const char **pp)
94{
95 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
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96}
97
c8965800 98/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
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99static int sdp_parse_rtpmap(AVFormatContext *s,
100 AVCodecContext *codec, RTSPStream *rtsp_st,
c8965800 101 int payload_type, const char *p)
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102{
103 char buf[256];
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104 int i;
105 AVCodec *c;
7b49ce2e 106 const char *c_name;
93ced3e8 107
d1ccf0e0 108 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
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109 * see if we can handle this kind of payload.
110 * The space should normally not be there but some Real streams or
111 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
112 * have a trailing space. */
113 get_word_sep(buf, sizeof(buf), "/ ", &p);
d1ccf0e0 114 if (payload_type >= RTP_PT_PRIVATE) {
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115 RTPDynamicProtocolHandler *handler;
116 for (handler = RTPFirstDynamicPayloadHandler;
117 handler; handler = handler->next) {
118 if (!strcasecmp(buf, handler->enc_name) &&
119 codec->codec_type == handler->codec_type) {
120 codec->codec_id = handler->codec_id;
121 rtsp_st->dynamic_handler = handler;
122 if (handler->open)
123 rtsp_st->dynamic_protocol_context = handler->open();
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124 break;
125 }
4934884a 126 }
93ced3e8 127 } else {
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128 /* We are in a standard case
129 * (from http://www.iana.org/assignments/rtp-parameters). */
d1ccf0e0 130 /* search into AVRtpPayloadTypes[] */
7ed19d7f 131 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
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RD
132 }
133
134 c = avcodec_find_decoder(codec->codec_id);
135 if (c && c->name)
7b49ce2e 136 c_name = c->name;
d1ccf0e0 137 else
170870b7 138 c_name = "(null)";
d1ccf0e0 139
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140 get_word_sep(buf, sizeof(buf), "/", &p);
141 i = atoi(buf);
142 switch (codec->codec_type) {
72415b2a 143 case AVMEDIA_TYPE_AUDIO:
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144 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
145 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
146 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
147 if (i > 0) {
148 codec->sample_rate = i;
149 get_word_sep(buf, sizeof(buf), "/", &p);
150 i = atoi(buf);
151 if (i > 0)
152 codec->channels = i;
153 // TODO: there is a bug here; if it is a mono stream, and
154 // less than 22000Hz, faad upconverts to stereo and twice
155 // the frequency. No problem, but the sample rate is being
156 // set here by the sdp line. Patch on its way. (rdm)
d1ccf0e0 157 }
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158 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
159 codec->sample_rate);
160 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
161 codec->channels);
162 break;
72415b2a 163 case AVMEDIA_TYPE_VIDEO:
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164 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
165 break;
166 default:
167 break;
168 }
169 return 0;
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170}
171
c8965800 172/* return the length and optionally the data */
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173static int hex_to_data(uint8_t *data, const char *p)
174{
175 int c, len, v;
176
177 len = 0;
178 v = 1;
c8965800 179 for (;;) {
93ced3e8 180 skip_spaces(&p);
6a8c8b36 181 if (*p == '\0')
93ced3e8 182 break;
c8965800 183 c = toupper((unsigned char) *p++);
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184 if (c >= '0' && c <= '9')
185 c = c - '0';
186 else if (c >= 'A' && c <= 'F')
187 c = c - 'A' + 10;
188 else
189 break;
190 v = (v << 4) | c;
191 if (v & 0x100) {
192 if (data)
193 data[len] = v;
194 len++;
195 v = 1;
196 }
197 }
198 return len;
199}
200
e6327fba
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201static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
202 char *attr, char *value)
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203{
204 switch (codec->codec_id) {
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205 case CODEC_ID_MPEG4:
206 case CODEC_ID_AAC:
207 if (!strcmp(attr, "config")) {
208 /* decode the hexa encoded parameter */
209 int len = hex_to_data(NULL, value);
210 if (codec->extradata)
211 av_free(codec->extradata);
212 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
213 if (!codec->extradata)
214 return;
215 codec->extradata_size = len;
216 hex_to_data(codec->extradata, value);
217 }
218 break;
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219 default:
220 break;
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221 }
222 return;
223}
224
644e7acb 225typedef struct {
7b49ce2e 226 const char *str;
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227 uint16_t type;
228 uint32_t offset;
644e7acb 229} AttrNameMap;
d1ccf0e0 230
c2bfd816 231/* All known fmtp parameters and the corresponding RTPAttrTypeEnum */
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232#define ATTR_NAME_TYPE_INT 0
233#define ATTR_NAME_TYPE_STR 1
644e7acb 234static const AttrNameMap attr_names[]=
d1ccf0e0 235{
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236 { "SizeLength", ATTR_NAME_TYPE_INT,
237 offsetof(RTPPayloadData, sizelength) },
238 { "IndexLength", ATTR_NAME_TYPE_INT,
239 offsetof(RTPPayloadData, indexlength) },
240 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
241 offsetof(RTPPayloadData, indexdeltalength) },
242 { "profile-level-id", ATTR_NAME_TYPE_INT,
243 offsetof(RTPPayloadData, profile_level_id) },
244 { "StreamType", ATTR_NAME_TYPE_INT,
245 offsetof(RTPPayloadData, streamtype) },
246 { "mode", ATTR_NAME_TYPE_STR,
247 offsetof(RTPPayloadData, mode) },
248 { NULL, -1, -1 },
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RD
249};
250
c2bfd816 251/* parse the attribute line from the fmtp a line of an sdp response. This
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252 * is broken out as a function because it is used in rtp_h264.c, which is
253 * forthcoming. */
3307e6ea 254int ff_rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
93993933 255 char *value, int value_size)
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256{
257 skip_spaces(p);
c8965800 258 if (**p) {
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259 get_word_sep(attr, attr_size, "=", p);
260 if (**p == '=')
261 (*p)++;
262 get_word_sep(value, value_size, ";", p);
263 if (**p == ';')
264 (*p)++;
265 return 1;
266 }
267 return 0;
268}
269
d1ccf0e0
RD
270/* parse a SDP line and save stream attributes */
271static void sdp_parse_fmtp(AVStream *st, const char *p)
93ced3e8
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272{
273 char attr[256];
373afbaf
RB
274 /* Vorbis setup headers can be up to 12KB and are sent base64
275 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
276 char value[16384];
d1ccf0e0 277 int i;
d1ccf0e0 278 RTSPStream *rtsp_st = st->priv_data;
01f4895c 279 AVCodecContext *codec = st->codec;
be73a544 280 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
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281
282 /* loop on each attribute */
3307e6ea 283 while (ff_rtsp_next_attr_and_value(&p, attr, sizeof(attr),
93993933 284 value, sizeof(value))) {
c8965800
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285 /* grab the codec extra_data from the config parameter of the fmtp
286 * line */
e6327fba
RB
287 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
288 attr, value);
d1ccf0e0
RD
289 /* Looking for a known attribute */
290 for (i = 0; attr_names[i].str; ++i) {
291 if (!strcasecmp(attr, attr_names[i].str)) {
c8965800
RB
292 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
293 *(int *)((char *)rtp_payload_data +
294 attr_names[i].offset) = atoi(value);
295 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
296 *(char **)((char *)rtp_payload_data +
297 attr_names[i].offset) = av_strdup(value);
bb270c08 298 }
93ced3e8 299 }
93ced3e8
FB
300 }
301}
302
debe86bf 303/** Parse a string p in the form of Range:npt=xx-xx, and determine the start
31693e00
RM
304 * and end time.
305 * Used for seeking in the rtp stream.
306 */
307static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
308{
309 char buf[256];
310
311 skip_spaces(&p);
f7d78f36 312 if (!av_stristart(p, "npt=", &p))
31693e00
RM
313 return;
314
315 *start = AV_NOPTS_VALUE;
316 *end = AV_NOPTS_VALUE;
317
318 get_word_sep(buf, sizeof(buf), "-", &p);
319 *start = parse_date(buf, 1);
320 if (*p == '-') {
321 p++;
322 get_word_sep(buf, sizeof(buf), "-", &p);
323 *end = parse_date(buf, 1);
324 }
325// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
326// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
327}
328
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329typedef struct SDPParseState {
330 /* SDP only */
331 struct in_addr default_ip;
c8965800
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332 int default_ttl;
333 int skip_media; ///< set if an unknown m= line occurs
93ced3e8
FB
334} SDPParseState;
335
336static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
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337 int letter, const char *buf)
338{
8b1ab7bf 339 RTSPState *rt = s->priv_data;
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340 char buf1[64], st_type[64];
341 const char *p;
72415b2a 342 enum AVMediaType codec_type;
fb65d2ca 343 int payload_type, i;
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344 AVStream *st;
345 RTSPStream *rtsp_st;
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346 struct in_addr sdp_ip;
347 int ttl;
348
67c9cd69 349 dprintf(s, "sdp: %c='%s'\n", letter, buf);
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350
351 p = buf;
cb760a47
RB
352 if (s1->skip_media && letter != 'm')
353 return;
c8965800 354 switch (letter) {
93ced3e8
FB
355 case 'c':
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IN") != 0)
358 return;
359 get_word(buf1, sizeof(buf1), &p);
360 if (strcmp(buf1, "IP4") != 0)
361 return;
362 get_word_sep(buf1, sizeof(buf1), "/", &p);
ac11d562 363 if (ff_inet_aton(buf1, &sdp_ip) == 0)
93ced3e8
FB
364 return;
365 ttl = 16;
366 if (*p == '/') {
367 p++;
368 get_word_sep(buf1, sizeof(buf1), "/", &p);
369 ttl = atoi(buf1);
370 }
371 if (s->nb_streams == 0) {
372 s1->default_ip = sdp_ip;
373 s1->default_ttl = ttl;
374 } else {
375 st = s->streams[s->nb_streams - 1];
376 rtsp_st = st->priv_data;
377 rtsp_st->sdp_ip = sdp_ip;
378 rtsp_st->sdp_ttl = ttl;
379 }
380 break;
1617ad97 381 case 's':
2ef6c124 382 av_metadata_set2(&s->metadata, "title", p, 0);
1617ad97
FB
383 break;
384 case 'i':
385 if (s->nb_streams == 0) {
2ef6c124 386 av_metadata_set2(&s->metadata, "comment", p, 0);
1617ad97
FB
387 break;
388 }
389 break;
390 case 'm':
391 /* new stream */
cb760a47 392 s1->skip_media = 0;
1617ad97
FB
393 get_word(st_type, sizeof(st_type), &p);
394 if (!strcmp(st_type, "audio")) {
72415b2a 395 codec_type = AVMEDIA_TYPE_AUDIO;
1617ad97 396 } else if (!strcmp(st_type, "video")) {
72415b2a 397 codec_type = AVMEDIA_TYPE_VIDEO;
090438cc 398 } else if (!strcmp(st_type, "application")) {
72415b2a 399 codec_type = AVMEDIA_TYPE_DATA;
1617ad97 400 } else {
cb760a47 401 s1->skip_media = 1;
1617ad97
FB
402 return;
403 }
1617ad97
FB
404 rtsp_st = av_mallocz(sizeof(RTSPStream));
405 if (!rtsp_st)
406 return;
8b1ab7bf
FB
407 rtsp_st->stream_index = -1;
408 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
93ced3e8
FB
409
410 rtsp_st->sdp_ip = s1->default_ip;
411 rtsp_st->sdp_ttl = s1->default_ttl;
412
93ced3e8
FB
413 get_word(buf1, sizeof(buf1), &p); /* port */
414 rtsp_st->sdp_port = atoi(buf1);
415
416 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
115329f1 417
93ced3e8
FB
418 /* XXX: handle list of formats */
419 get_word(buf1, sizeof(buf1), &p); /* format list */
420 rtsp_st->sdp_payload_type = atoi(buf1);
93ced3e8 421
7ed19d7f 422 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
8b1ab7bf
FB
423 /* no corresponding stream */
424 } else {
425 st = av_new_stream(s, 0);
426 if (!st)
427 return;
428 st->priv_data = rtsp_st;
429 rtsp_st->stream_index = st->index;
01f4895c 430 st->codec->codec_type = codec_type;
d1ccf0e0 431 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
8b1ab7bf 432 /* if standard payload type, we can find the codec right now */
bf6d9818 433 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
8b1ab7bf
FB
434 }
435 }
1617ad97 436 /* put a default control url */
00eb13e0 437 av_strlcpy(rtsp_st->control_url, rt->control_uri,
c8965800 438 sizeof(rtsp_st->control_url));
1617ad97
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439 break;
440 case 'a':
00eb13e0
AS
441 if (av_strstart(p, "control:", &p)) {
442 if (s->nb_streams == 0) {
443 if (!strncmp(p, "rtsp://", 7))
444 av_strlcpy(rt->control_uri, p,
445 sizeof(rt->control_uri));
446 } else {
1617ad97
FB
447 char proto[32];
448 /* get the control url */
449 st = s->streams[s->nb_streams - 1];
450 rtsp_st = st->priv_data;
115329f1 451
1617ad97 452 /* XXX: may need to add full url resolution */
c5c6e67c 453 ff_url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
f984dcf6 454 NULL, NULL, 0, p);
1617ad97
FB
455 if (proto[0] == '\0') {
456 /* relative control URL */
00eb13e0 457 if (rtsp_st->control_url[strlen(rtsp_st->control_url)-1]!='/')
c8965800
RB
458 av_strlcat(rtsp_st->control_url, "/",
459 sizeof(rtsp_st->control_url));
460 av_strlcat(rtsp_st->control_url, p,
461 sizeof(rtsp_st->control_url));
462 } else
463 av_strlcpy(rtsp_st->control_url, p,
464 sizeof(rtsp_st->control_url));
00eb13e0 465 }
83d14c85 466 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
93ced3e8 467 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
115329f1 468 get_word(buf1, sizeof(buf1), &p);
93ced3e8 469 payload_type = atoi(buf1);
83d14c85 470 st = s->streams[s->nb_streams - 1];
ff16f551 471 rtsp_st = st->priv_data;
8f3c87f3 472 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
f7d78f36 473 } else if (av_strstart(p, "fmtp:", &p)) {
93ced3e8 474 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
115329f1 475 get_word(buf1, sizeof(buf1), &p);
93ced3e8 476 payload_type = atoi(buf1);
c8965800
RB
477 for (i = 0; i < s->nb_streams; i++) {
478 st = s->streams[i];
93ced3e8
FB
479 rtsp_st = st->priv_data;
480 if (rtsp_st->sdp_payload_type == payload_type) {
c8965800
RB
481 if (!(rtsp_st->dynamic_handler &&
482 rtsp_st->dynamic_handler->parse_sdp_a_line &&
483 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
484 i, rtsp_st->dynamic_protocol_context, buf)))
ed787542 485 sdp_parse_fmtp(st, p);
93ced3e8
FB
486 }
487 }
c8965800 488 } else if (av_strstart(p, "framesize:", &p)) {
d0deedcb
RM
489 // let dynamic protocol handlers have a stab at the line.
490 get_word(buf1, sizeof(buf1), &p);
491 payload_type = atoi(buf1);
c8965800
RB
492 for (i = 0; i < s->nb_streams; i++) {
493 st = s->streams[i];
d0deedcb 494 rtsp_st = st->priv_data;
c8965800
RB
495 if (rtsp_st->sdp_payload_type == payload_type &&
496 rtsp_st->dynamic_handler &&
497 rtsp_st->dynamic_handler->parse_sdp_a_line)
498 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
499 rtsp_st->dynamic_protocol_context, buf);
d0deedcb 500 }
c8965800 501 } else if (av_strstart(p, "range:", &p)) {
31693e00
RM
502 int64_t start, end;
503
504 // this is so that seeking on a streamed file can work.
505 rtsp_parse_range_npt(p, &start, &end);
c8965800
RB
506 s->start_time = start;
507 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
508 s->duration = (end == AV_NOPTS_VALUE) ?
509 AV_NOPTS_VALUE : end - start;
119b4668
RB
510 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
511 if (atoi(p) == 1)
512 rt->transport = RTSP_TRANSPORT_RDT;
1a30d541
RB
513 } else {
514 if (rt->server_type == RTSP_SERVER_WMS)
515 ff_wms_parse_sdp_a_line(s, p);
516 if (s->nb_streams > 0) {
c4a3d032
RB
517 if (rt->server_type == RTSP_SERVER_REAL)
518 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
519
520 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
521 if (rtsp_st->dynamic_handler &&
522 rtsp_st->dynamic_handler->parse_sdp_a_line)
c8965800
RB
523 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
524 s->nb_streams - 1,
c4a3d032 525 rtsp_st->dynamic_protocol_context, buf);
1a30d541 526 }
1617ad97
FB
527 }
528 break;
529 }
530}
531
5c91a675 532static int sdp_parse(AVFormatContext *s, const char *content)
1617ad97
FB
533{
534 const char *p;
535 int letter;
9211bcdd
RB
536 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
537 * contain long SDP lines containing complete ASF Headers (several
538 * kB) or arrays of MDPR (RM stream descriptor) headers plus
539 * "rulebooks" describing their properties. Therefore, the SDP line
373afbaf
RB
540 * buffer is large.
541 *
542 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
543 char buf[16384], *q;
93ced3e8 544 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
115329f1 545
93ced3e8 546 memset(s1, 0, sizeof(SDPParseState));
1617ad97 547 p = content;
c8965800 548 for (;;) {
1617ad97
FB
549 skip_spaces(&p);
550 letter = *p;
551 if (letter == '\0')
552 break;
553 p++;
554 if (*p != '=')
555 goto next_line;
556 p++;
557 /* get the content */
558 q = buf;
b6892136 559 while (*p != '\n' && *p != '\r' && *p != '\0') {
1617ad97
FB
560 if ((q - buf) < sizeof(buf) - 1)
561 *q++ = *p;
562 p++;
563 }
564 *q = '\0';
93ced3e8 565 sdp_parse_line(s, s1, letter, buf);
1617ad97
FB
566 next_line:
567 while (*p != '\n' && *p != '\0')
568 p++;
569 if (*p == '\n')
570 p++;
571 }
572 return 0;
573}
574
1ced9da3 575/* close and free RTSP streams */
3307e6ea 576void ff_rtsp_close_streams(AVFormatContext *s)
1ced9da3 577{
52aa4338 578 RTSPState *rt = s->priv_data;
1ced9da3
LA
579 int i;
580 RTSPStream *rtsp_st;
581
c8965800 582 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1ced9da3
LA
583 rtsp_st = rt->rtsp_streams[i];
584 if (rtsp_st) {
585 if (rtsp_st->transport_priv) {
fd450a51
MS
586 if (s->oformat) {
587 AVFormatContext *rtpctx = rtsp_st->transport_priv;
588 av_write_trailer(rtpctx);
b7dc88fc
MS
589 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
590 uint8_t *ptr;
591 url_close_dyn_buf(rtpctx->pb, &ptr);
592 av_free(ptr);
593 } else {
685e76b5 594 url_fclose(rtpctx->pb);
b7dc88fc 595 }
f86f6656
MS
596 av_metadata_free(&rtpctx->streams[0]->metadata);
597 av_metadata_free(&rtpctx->metadata);
fd450a51
MS
598 av_free(rtpctx->streams[0]);
599 av_free(rtpctx);
600 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
601 ff_rdt_parse_close(rtsp_st->transport_priv);
602 else
603 rtp_parse_close(rtsp_st->transport_priv);
604 }
605 if (rtsp_st->rtp_handle)
606 url_close(rtsp_st->rtp_handle);
607 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
c8965800
RB
608 rtsp_st->dynamic_handler->close(
609 rtsp_st->dynamic_protocol_context);
1ced9da3
LA
610 }
611 }
612 av_free(rt->rtsp_streams);
613 if (rt->asf_ctx) {
614 av_close_input_stream (rt->asf_ctx);
615 rt->asf_ctx = NULL;
616 }
1ced9da3
LA
617}
618
5c7fd910
MS
619static void *rtsp_rtp_mux_open(AVFormatContext *s, AVStream *st,
620 URLContext *handle)
621{
c07c6f81 622 RTSPState *rt = s->priv_data;
fd450a51
MS
623 AVFormatContext *rtpctx;
624 int ret;
625 AVOutputFormat *rtp_format = av_guess_format("rtp", NULL, NULL);
626
627 if (!rtp_format)
628 return NULL;
629
630 /* Allocate an AVFormatContext for each output stream */
631 rtpctx = avformat_alloc_context();
632 if (!rtpctx)
633 return NULL;
634
635 rtpctx->oformat = rtp_format;
636 if (!av_new_stream(rtpctx, 0)) {
637 av_free(rtpctx);
638 return NULL;
639 }
640 /* Copy the max delay setting; the rtp muxer reads this. */
641 rtpctx->max_delay = s->max_delay;
642 /* Copy other stream parameters. */
643 rtpctx->streams[0]->sample_aspect_ratio = st->sample_aspect_ratio;
644
c07c6f81
MS
645 /* Set the synchronized start time. */
646 rtpctx->start_time_realtime = rt->start_time;
647
fd450a51
MS
648 /* Remove the local codec, link to the original codec
649 * context instead, to give the rtp muxer access to
650 * codec parameters. */
651 av_free(rtpctx->streams[0]->codec);
652 rtpctx->streams[0]->codec = st->codec;
653
b7dc88fc 654 if (handle) {
685e76b5 655 url_fdopen(&rtpctx->pb, handle);
b7dc88fc
MS
656 } else
657 url_open_dyn_packet_buf(&rtpctx->pb, RTSP_TCP_MAX_PACKET_SIZE);
fd450a51
MS
658 ret = av_write_header(rtpctx);
659
660 if (ret) {
b7dc88fc 661 if (handle) {
685e76b5 662 url_fclose(rtpctx->pb);
b7dc88fc
MS
663 } else {
664 uint8_t *ptr;
665 url_close_dyn_buf(rtpctx->pb, &ptr);
666 av_free(ptr);
667 }
fd450a51
MS
668 av_free(rtpctx->streams[0]);
669 av_free(rtpctx);
670 return NULL;
671 }
672
673 /* Copy the RTP AVStream timebase back to the original AVStream */
674 st->time_base = rtpctx->streams[0]->time_base;
675 return rtpctx;
676}
677
c8965800 678static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
1ced9da3
LA
679{
680 RTSPState *rt = s->priv_data;
681 AVStream *st = NULL;
682
683 /* open the RTP context */
684 if (rtsp_st->stream_index >= 0)
685 st = s->streams[rtsp_st->stream_index];
686 if (!st)
687 s->ctx_flags |= AVFMTCTX_NOHEADER;
688
fd450a51
MS
689 if (s->oformat) {
690 rtsp_st->transport_priv = rtsp_rtp_mux_open(s, st, rtsp_st->rtp_handle);
c2bfd816 691 /* Ownership of rtp_handle is passed to the rtp mux context */
fd450a51
MS
692 rtsp_st->rtp_handle = NULL;
693 } else if (rt->transport == RTSP_TRANSPORT_RDT)
1ced9da3
LA
694 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
695 rtsp_st->dynamic_protocol_context,
696 rtsp_st->dynamic_handler);
697 else
698 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
699 rtsp_st->sdp_payload_type,
700 &rtsp_st->rtp_payload_data);
701
702 if (!rtsp_st->transport_priv) {
703 return AVERROR(ENOMEM);
704 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
c8965800 705 if (rtsp_st->dynamic_handler) {
1ced9da3
LA
706 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
707 rtsp_st->dynamic_protocol_context,
708 rtsp_st->dynamic_handler);
709 }
710 }
711
712 return 0;
713}
714
6f5a3d0a 715#if CONFIG_RTSP_DEMUXER || CONFIG_RTSP_MUXER
1ced9da3
LA
716static int rtsp_probe(AVProbeData *p)
717{
718 if (av_strstart(p->filename, "rtsp:", NULL))
719 return AVPROBE_SCORE_MAX;
720 return 0;
721}
722
1617ad97
FB
723static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
724{
725 const char *p;
726 int v;
727
728 p = *pp;
729 skip_spaces(&p);
730 v = strtol(p, (char **)&p, 10);
731 if (*p == '-') {
732 p++;
733 *min_ptr = v;
734 v = strtol(p, (char **)&p, 10);
735 *max_ptr = v;
736 } else {
737 *min_ptr = v;
738 *max_ptr = v;
739 }
740 *pp = p;
741}
742
743/* XXX: only one transport specification is parsed */
a9e534d5 744static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
1617ad97
FB
745{
746 char transport_protocol[16];
747 char profile[16];
748 char lower_transport[16];
749 char parameter[16];
750 RTSPTransportField *th;
751 char buf[256];
115329f1 752
1617ad97 753 reply->nb_transports = 0;
115329f1 754
c8965800 755 for (;;) {
1617ad97
FB
756 skip_spaces(&p);
757 if (*p == '\0')
758 break;
759
760 th = &reply->transports[reply->nb_transports];
761
115329f1 762 get_word_sep(transport_protocol, sizeof(transport_protocol),
1617ad97 763 "/", &p);
e1502118 764 if (!strcasecmp (transport_protocol, "rtp")) {
7ecc634e
LB
765 get_word_sep(profile, sizeof(profile), "/;,", &p);
766 lower_transport[0] = '\0';
767 /* rtp/avp/<protocol> */
768 if (*p == '/') {
7ecc634e
LB
769 get_word_sep(lower_transport, sizeof(lower_transport),
770 ";,", &p);
119b4668
RB
771 }
772 th->transport = RTSP_TRANSPORT_RTP;
773 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
774 !strcasecmp (transport_protocol, "x-real-rdt")) {
7ecc634e 775 /* x-pn-tng/<protocol> */
e1502118
LB
776 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
777 profile[0] = '\0';
119b4668 778 th->transport = RTSP_TRANSPORT_RDT;
1617ad97 779 }
b6892136 780 if (!strcasecmp(lower_transport, "TCP"))
90abbdba 781 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
1617ad97 782 else
90abbdba 783 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
115329f1 784
1617ad97
FB
785 if (*p == ';')
786 p++;
787 /* get each parameter */
788 while (*p != '\0' && *p != ',') {
789 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
790 if (!strcmp(parameter, "port")) {
791 if (*p == '=') {
792 p++;
793 rtsp_parse_range(&th->port_min, &th->port_max, &p);
794 }
795 } else if (!strcmp(parameter, "client_port")) {
796 if (*p == '=') {
797 p++;
115329f1 798 rtsp_parse_range(&th->client_port_min,
1617ad97
FB
799 &th->client_port_max, &p);
800 }
801 } else if (!strcmp(parameter, "server_port")) {
802 if (*p == '=') {
803 p++;
115329f1 804 rtsp_parse_range(&th->server_port_min,
1617ad97
FB
805 &th->server_port_max, &p);
806 }
807 } else if (!strcmp(parameter, "interleaved")) {
808 if (*p == '=') {
809 p++;
115329f1 810 rtsp_parse_range(&th->interleaved_min,
1617ad97
FB
811 &th->interleaved_max, &p);
812 }
813 } else if (!strcmp(parameter, "multicast")) {
90abbdba
RB
814 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
815 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
1617ad97
FB
816 } else if (!strcmp(parameter, "ttl")) {
817 if (*p == '=') {
818 p++;
819 th->ttl = strtol(p, (char **)&p, 10);
820 }
821 } else if (!strcmp(parameter, "destination")) {
822 struct in_addr ipaddr;
823
824 if (*p == '=') {
825 p++;
826 get_word_sep(buf, sizeof(buf), ";,", &p);
ac11d562 827 if (ff_inet_aton(buf, &ipaddr))
1617ad97
FB
828 th->destination = ntohl(ipaddr.s_addr);
829 }
830 }
831 while (*p != ';' && *p != '\0' && *p != ',')
832 p++;
833 if (*p == ';')
834 p++;
835 }
836 if (*p == ',')
837 p++;
838
839 reply->nb_transports++;
840 }
841}
842
2626308a
MS
843void ff_rtsp_parse_line(RTSPMessageHeader *reply, const char *buf,
844 HTTPAuthState *auth_state)
1617ad97
FB
845{
846 const char *p;
847
848 /* NOTE: we do case independent match for broken servers */
849 p = buf;
f7d78f36 850 if (av_stristart(p, "Session:", &p)) {
30e79845 851 int t;
1617ad97 852 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
30e79845
RB
853 if (av_stristart(p, ";timeout=", &p) &&
854 (t = strtol(p, NULL, 10)) > 0) {
855 reply->timeout = t;
856 }
f7d78f36 857 } else if (av_stristart(p, "Content-Length:", &p)) {
1617ad97 858 reply->content_length = strtol(p, NULL, 10);
f7d78f36 859 } else if (av_stristart(p, "Transport:", &p)) {
1617ad97 860 rtsp_parse_transport(reply, p);
f7d78f36 861 } else if (av_stristart(p, "CSeq:", &p)) {
1617ad97 862 reply->seq = strtol(p, NULL, 10);
f7d78f36 863 } else if (av_stristart(p, "Range:", &p)) {
31693e00 864 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
30aa6aed
RB
865 } else if (av_stristart(p, "RealChallenge1:", &p)) {
866 skip_spaces(&p);
867 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
7a86bafa
RB
868 } else if (av_stristart(p, "Server:", &p)) {
869 skip_spaces(&p);
870 av_strlcpy(reply->server, p, sizeof(reply->server));
fccb1770
RB
871 } else if (av_stristart(p, "Notice:", &p) ||
872 av_stristart(p, "X-Notice:", &p)) {
873 reply->notice = strtol(p, NULL, 10);
d243ba30
LB
874 } else if (av_stristart(p, "Location:", &p)) {
875 skip_spaces(&p);
876 av_strlcpy(reply->location, p , sizeof(reply->location));
2626308a
MS
877 } else if (av_stristart(p, "WWW-Authenticate:", &p) && auth_state) {
878 skip_spaces(&p);
879 ff_http_auth_handle_header(auth_state, "WWW-Authenticate", p);
880 } else if (av_stristart(p, "Authentication-Info:", &p) && auth_state) {
881 skip_spaces(&p);
882 ff_http_auth_handle_header(auth_state, "Authentication-Info", p);
1617ad97
FB
883 }
884}
885
b7b8fc34 886/* skip a RTP/TCP interleaved packet */
ec55edba 887void ff_rtsp_skip_packet(AVFormatContext *s)
b7b8fc34
FB
888{
889 RTSPState *rt = s->priv_data;
890 int ret, len, len1;
891 uint8_t buf[1024];
892
0e848977 893 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b7b8fc34
FB
894 if (ret != 3)
895 return;
80fb8234 896 len = AV_RB16(buf + 1);
67c9cd69
BC
897
898 dprintf(s, "skipping RTP packet len=%d\n", len);
899
b7b8fc34
FB
900 /* skip payload */
901 while (len > 0) {
902 len1 = len;
903 if (len1 > sizeof(buf))
904 len1 = sizeof(buf);
0e848977 905 ret = url_read_complete(rt->rtsp_hd, buf, len1);
b7b8fc34
FB
906 if (ret != len1)
907 return;
908 len -= len1;
909 }
910}
1617ad97 911
3307e6ea 912int ff_rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
93993933
MS
913 unsigned char **content_ptr,
914 int return_on_interleaved_data)
1617ad97
FB
915{
916 RTSPState *rt = s->priv_data;
917 char buf[4096], buf1[1024], *q;
918 unsigned char ch;
919 const char *p;
7e726132 920 int ret, content_length, line_count = 0;
1617ad97
FB
921 unsigned char *content = NULL;
922
d541a7d2 923 memset(reply, 0, sizeof(*reply));
1617ad97 924
1617ad97 925 /* parse reply (XXX: use buffers) */
1617ad97 926 rt->last_reply[0] = '\0';
c8965800 927 for (;;) {
1617ad97 928 q = buf;
c8965800 929 for (;;) {
0e848977 930 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
7e726132 931#ifdef DEBUG_RTP_TCP
67c9cd69 932 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
7e726132
RB
933#endif
934 if (ret != 1)
935 return -1;
1617ad97
FB
936 if (ch == '\n')
937 break;
b7b8fc34
FB
938 if (ch == '$') {
939 /* XXX: only parse it if first char on line ? */
7e726132
RB
940 if (return_on_interleaved_data) {
941 return 1;
942 } else
ec55edba 943 ff_rtsp_skip_packet(s);
b7b8fc34 944 } else if (ch != '\r') {
1617ad97
FB
945 if ((q - buf) < sizeof(buf) - 1)
946 *q++ = ch;
947 }
948 }
949 *q = '\0';
67c9cd69
BC
950
951 dprintf(s, "line='%s'\n", buf);
952
1617ad97
FB
953 /* test if last line */
954 if (buf[0] == '\0')
955 break;
956 p = buf;
957 if (line_count == 0) {
958 /* get reply code */
959 get_word(buf1, sizeof(buf1), &p);
960 get_word(buf1, sizeof(buf1), &p);
961 reply->status_code = atoi(buf1);
962 } else {
2626308a 963 ff_rtsp_parse_line(reply, p, &rt->auth_state);
75e61b0e
MR
964 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
965 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1617ad97
FB
966 }
967 line_count++;
968 }
115329f1 969
1617ad97 970 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
75e61b0e 971 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
115329f1 972
1617ad97
FB
973 content_length = reply->content_length;
974 if (content_length > 0) {
975 /* leave some room for a trailing '\0' (useful for simple parsing) */
976 content = av_malloc(content_length + 1);
0e848977 977 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1617ad97
FB
978 content[content_length] = '\0';
979 }
980 if (content_ptr)
981 *content_ptr = content;
e2e2e7dd
AB
982 else
983 av_free(content);
7e726132 984
7ed8211b
LB
985 if (rt->seq != reply->seq) {
986 av_log(s, AV_LOG_WARNING, "CSeq %d expected, %d received.\n",
987 rt->seq, reply->seq);
988 }
989
fccb1770
RB
990 /* EOS */
991 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
992 reply->notice == 2104 /* Start-of-Stream Reached */ ||
c8965800 993 reply->notice == 2306 /* Continuous Feed Terminated */) {
fccb1770 994 rt->state = RTSP_STATE_IDLE;
c8965800 995 } else if (reply->notice >= 4400 && reply->notice < 5500) {
fccb1770 996 return AVERROR(EIO); /* data or server error */
c8965800 997 } else if (reply->notice == 2401 /* Ticket Expired */ ||
fccb1770
RB
998 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
999 return AVERROR(EPERM);
1000
7e726132 1001 return 0;
1617ad97
FB
1002}
1003
3307e6ea 1004void ff_rtsp_send_cmd_with_content_async(AVFormatContext *s,
b17d11c6
MS
1005 const char *method, const char *url,
1006 const char *headers,
93993933
MS
1007 const unsigned char *send_content,
1008 int send_content_length)
29b9f58b
RB
1009{
1010 RTSPState *rt = s->priv_data;
7b4a3645 1011 char buf[4096];
29b9f58b
RB
1012
1013 rt->seq++;
b17d11c6
MS
1014 snprintf(buf, sizeof(buf), "%s %s RTSP/1.0\r\n", method, url);
1015 if (headers)
1016 av_strlcat(buf, headers, sizeof(buf));
7b4a3645 1017 av_strlcatf(buf, sizeof(buf), "CSeq: %d\r\n", rt->seq);
b17d11c6
MS
1018 if (rt->session_id[0] != '\0' && (!headers ||
1019 !strstr(headers, "\nIf-Match:"))) {
7b4a3645 1020 av_strlcatf(buf, sizeof(buf), "Session: %s\r\n", rt->session_id);
29b9f58b 1021 }
aa8bf2fb
MS
1022 if (rt->auth[0]) {
1023 char *str = ff_http_auth_create_response(&rt->auth_state,
1024 rt->auth, url, method);
1025 if (str)
1026 av_strlcat(buf, str, sizeof(buf));
1027 av_free(str);
1028 }
dfd017bf
MS
1029 if (send_content_length > 0 && send_content)
1030 av_strlcatf(buf, sizeof(buf), "Content-Length: %d\r\n", send_content_length);
29b9f58b 1031 av_strlcat(buf, "\r\n", sizeof(buf));
67c9cd69
BC
1032
1033 dprintf(s, "Sending:\n%s--\n", buf);
1034
29b9f58b 1035 url_write(rt->rtsp_hd, buf, strlen(buf));
dfd017bf
MS
1036 if (send_content_length > 0 && send_content)
1037 url_write(rt->rtsp_hd, send_content, send_content_length);
30e79845
RB
1038 rt->last_cmd_time = av_gettime();
1039}
1040
b17d11c6
MS
1041void ff_rtsp_send_cmd_async(AVFormatContext *s, const char *method,
1042 const char *url, const char *headers)
dfd017bf 1043{
b17d11c6 1044 ff_rtsp_send_cmd_with_content_async(s, method, url, headers, NULL, 0);
dfd017bf
MS
1045}
1046
b17d11c6
MS
1047void ff_rtsp_send_cmd(AVFormatContext *s, const char *method, const char *url,
1048 const char *headers, RTSPMessageHeader *reply,
93993933 1049 unsigned char **content_ptr)
30e79845 1050{
b17d11c6
MS
1051 ff_rtsp_send_cmd_with_content(s, method, url, headers, reply,
1052 content_ptr, NULL, 0);
29b9f58b
RB
1053}
1054
3307e6ea 1055void ff_rtsp_send_cmd_with_content(AVFormatContext *s,
b17d11c6
MS
1056 const char *method, const char *url,
1057 const char *header,
e9fea405
MS
1058 RTSPMessageHeader *reply,
1059 unsigned char **content_ptr,
1060 const unsigned char *send_content,
1061 int send_content_length)
dfd017bf 1062{
30af0779
MS
1063 RTSPState *rt = s->priv_data;
1064 HTTPAuthType cur_auth_type;
1065
1066retry:
1067 cur_auth_type = rt->auth_state.auth_type;
b17d11c6
MS
1068 ff_rtsp_send_cmd_with_content_async(s, method, url, header,
1069 send_content, send_content_length);
dfd017bf 1070
3307e6ea 1071 ff_rtsp_read_reply(s, reply, content_ptr, 0);
30af0779
MS
1072
1073 if (reply->status_code == 401 && cur_auth_type == HTTP_AUTH_NONE &&
1074 rt->auth_state.auth_type != HTTP_AUTH_NONE)
1075 goto retry;
dfd017bf
MS
1076}
1077
53620bba 1078/**
32e543f8 1079 * @return 0 on success, <0 on error, 1 if protocol is unavailable.
53620bba 1080 */
c8965800
RB
1081static int make_setup_request(AVFormatContext *s, const char *host, int port,
1082 int lower_transport, const char *real_challenge)
1617ad97
FB
1083{
1084 RTSPState *rt = s->priv_data;
f830c9a4 1085 int rtx, j, i, err, interleave = 0;
1617ad97 1086 RTSPStream *rtsp_st;
a9e534d5 1087 RTSPMessageHeader reply1, *reply = &reply1;
53620bba 1088 char cmd[2048];
e9dea59f
RB
1089 const char *trans_pref;
1090
119b4668 1091 if (rt->transport == RTSP_TRANSPORT_RDT)
e9dea59f
RB
1092 trans_pref = "x-pn-tng";
1093 else
1094 trans_pref = "RTP/AVP";
115329f1 1095
30e79845
RB
1096 /* default timeout: 1 minute */
1097 rt->timeout = 60;
1098
1617ad97
FB
1099 /* for each stream, make the setup request */
1100 /* XXX: we assume the same server is used for the control of each
c8965800 1101 * RTSP stream */
d1ccf0e0 1102
c8965800 1103 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1617ad97
FB
1104 char transport[2048];
1105
f830c9a4
RB
1106 /**
1107 * WMS serves all UDP data over a single connection, the RTX, which
1108 * isn't necessarily the first in the SDP but has to be the first
1109 * to be set up, else the second/third SETUP will fail with a 461.
1110 */
1111 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1112 rt->server_type == RTSP_SERVER_WMS) {
1113 if (i == 0) {
1114 /* rtx first */
1115 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1116 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1117 if (len >= 4 &&
c8965800
RB
1118 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1119 "/rtx"))
f830c9a4
RB
1120 break;
1121 }
1122 if (rtx == rt->nb_rtsp_streams)
1123 return -1; /* no RTX found */
1124 rtsp_st = rt->rtsp_streams[rtx];
1125 } else
1126 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1127 } else
2fea9650 1128 rtsp_st = rt->rtsp_streams[i];
1617ad97 1129
1617ad97 1130 /* RTP/UDP */
90abbdba 1131 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
85fb7b34 1132 char buf[256];
85fb7b34 1133
f830c9a4
RB
1134 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1135 port = reply->transports[0].client_port_min;
1136 goto have_port;
1137 }
1138
85fb7b34 1139 /* first try in specified port range */
d1ccf0e0 1140 if (RTSP_RTP_PORT_MIN != 0) {
c8965800 1141 while (j <= RTSP_RTP_PORT_MAX) {
57b5555c
MS
1142 ff_url_join(buf, sizeof(buf), "rtp", NULL, host, -1,
1143 "?localport=%d", j);
c8965800
RB
1144 /* we will use two ports per rtp stream (rtp and rtcp) */
1145 j += 2;
1146 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
85fb7b34
FB
1147 goto rtp_opened;
1148 }
1617ad97 1149 }
85fb7b34 1150
c8965800
RB
1151#if 0
1152 /* then try on any port */
1153 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1154 err = AVERROR_INVALIDDATA;
1155 goto fail;
1156 }
1157#endif
85fb7b34
FB
1158
1159 rtp_opened:
8b1ab7bf 1160 port = rtp_get_local_port(rtsp_st->rtp_handle);
f830c9a4 1161 have_port:
0ad306bc 1162 snprintf(transport, sizeof(transport) - 1,
eee2cbff
RB
1163 "%s/UDP;", trans_pref);
1164 if (rt->server_type != RTSP_SERVER_REAL)
1165 av_strlcat(transport, "unicast;", sizeof(transport));
1166 av_strlcatf(transport, sizeof(transport),
1167 "client_port=%d", port);
f830c9a4
RB
1168 if (rt->transport == RTSP_TRANSPORT_RTP &&
1169 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
e9dea59f 1170 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1617ad97
FB
1171 }
1172
1173 /* RTP/TCP */
90abbdba 1174 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
090438cc
RB
1175 /** For WMS streams, the application streams are only used for
1176 * UDP. When trying to set it up for TCP streams, the server
1177 * will return an error. Therefore, we skip those streams. */
1178 if (rt->server_type == RTSP_SERVER_WMS &&
c8965800 1179 s->streams[rtsp_st->stream_index]->codec->codec_type ==
72415b2a 1180 AVMEDIA_TYPE_DATA)
090438cc 1181 continue;
0ad306bc 1182 snprintf(transport, sizeof(transport) - 1,
d1c6e47c
RB
1183 "%s/TCP;", trans_pref);
1184 if (rt->server_type == RTSP_SERVER_WMS)
1185 av_strlcat(transport, "unicast;", sizeof(transport));
1186 av_strlcatf(transport, sizeof(transport),
1187 "interleaved=%d-%d",
1188 interleave, interleave + 1);
1189 interleave += 2;
1617ad97
FB
1190 }
1191
90abbdba 1192 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
0ad306bc 1193 snprintf(transport, sizeof(transport) - 1,
e9dea59f 1194 "%s/UDP;multicast", trans_pref);
1617ad97 1195 }
69adcc4f
MS
1196 if (s->oformat) {
1197 av_strlcat(transport, ";mode=receive", sizeof(transport));
1198 } else if (rt->server_type == RTSP_SERVER_REAL ||
2efc97c2 1199 rt->server_type == RTSP_SERVER_WMS)
e9dea59f 1200 av_strlcat(transport, ";mode=play", sizeof(transport));
115329f1 1201 snprintf(cmd, sizeof(cmd),
b6892136 1202 "Transport: %s\r\n",
b17d11c6 1203 transport);
2e889ae4 1204 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
e9dea59f
RB
1205 char real_res[41], real_csum[9];
1206 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1207 real_challenge);
1208 av_strlcatf(cmd, sizeof(cmd),
1209 "If-Match: %s\r\n"
1210 "RealChallenge2: %s, sd=%s\r\n",
1211 rt->session_id, real_res, real_csum);
1212 }
b17d11c6 1213 ff_rtsp_send_cmd(s, "SETUP", rtsp_st->control_url, cmd, reply, NULL);
8a8754d8
RB
1214 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1215 err = 1;
1216 goto fail;
7e6ca34f
RB
1217 } else if (reply->status_code != RTSP_STATUS_OK ||
1218 reply->nb_transports != 1) {
1617ad97
FB
1219 err = AVERROR_INVALIDDATA;
1220 goto fail;
1221 }
1222
1223 /* XXX: same protocol for all streams is required */
1224 if (i > 0) {
119b4668
RB
1225 if (reply->transports[0].lower_transport != rt->lower_transport ||
1226 reply->transports[0].transport != rt->transport) {
1617ad97
FB
1227 err = AVERROR_INVALIDDATA;
1228 goto fail;
1229 }
1230 } else {
90abbdba 1231 rt->lower_transport = reply->transports[0].lower_transport;
119b4668 1232 rt->transport = reply->transports[0].transport;
1617ad97
FB
1233 }
1234
1235 /* close RTP connection if not choosen */
90abbdba
RB
1236 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1237 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
8b1ab7bf
FB
1238 url_close(rtsp_st->rtp_handle);
1239 rtsp_st->rtp_handle = NULL;
1617ad97
FB
1240 }
1241
90abbdba
RB
1242 switch(reply->transports[0].lower_transport) {
1243 case RTSP_LOWER_TRANSPORT_TCP:
1617ad97
FB
1244 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1245 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1246 break;
115329f1 1247
c8965800
RB
1248 case RTSP_LOWER_TRANSPORT_UDP: {
1249 char url[1024];
1250
1251 /* XXX: also use address if specified */
57b5555c
MS
1252 ff_url_join(url, sizeof(url), "rtp", NULL, host,
1253 reply->transports[0].server_port_min, NULL);
c8965800
RB
1254 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1255 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1256 err = AVERROR_INVALIDDATA;
1257 goto fail;
1617ad97 1258 }
9c8fa20d
MS
1259 /* Try to initialize the connection state in a
1260 * potential NAT router by sending dummy packets.
1261 * RTP/RTCP dummy packets are used for RDT, too.
1262 */
30ff7c5c 1263 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) && s->iformat)
9c8fa20d 1264 rtp_send_punch_packets(rtsp_st->rtp_handle);
1617ad97 1265 break;
c8965800
RB
1266 }
1267 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1268 char url[1024];
1269 struct in_addr in;
1270 int port, ttl;
1271
1272 if (reply->transports[0].destination) {
1273 in.s_addr = htonl(reply->transports[0].destination);
1274 port = reply->transports[0].port_min;
1275 ttl = reply->transports[0].ttl;
1276 } else {
1277 in = rtsp_st->sdp_ip;
1278 port = rtsp_st->sdp_port;
1279 ttl = rtsp_st->sdp_ttl;
1280 }
57b5555c
MS
1281 ff_url_join(url, sizeof(url), "rtp", NULL, inet_ntoa(in),
1282 port, "?ttl=%d", ttl);
c8965800
RB
1283 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1284 err = AVERROR_INVALIDDATA;
1285 goto fail;
1617ad97
FB
1286 }
1287 break;
1288 }
c8965800 1289 }
d1ccf0e0 1290
ee0cb67f 1291 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 1292 goto fail;
1617ad97
FB
1293 }
1294
30e79845
RB
1295 if (reply->timeout > 0)
1296 rt->timeout = reply->timeout;
1297
2e889ae4 1298 if (rt->server_type == RTSP_SERVER_REAL)
1256d16b
RB
1299 rt->need_subscription = 1;
1300
53620bba
RB
1301 return 0;
1302
1303fail:
c8965800 1304 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8a8754d8
RB
1305 if (rt->rtsp_streams[i]->rtp_handle) {
1306 url_close(rt->rtsp_streams[i]->rtp_handle);
1307 rt->rtsp_streams[i]->rtp_handle = NULL;
1308 }
1309 }
53620bba
RB
1310 return err;
1311}
1312
1ced9da3
LA
1313static int rtsp_read_play(AVFormatContext *s)
1314{
1315 RTSPState *rt = s->priv_data;
1316 RTSPMessageHeader reply1, *reply = &reply1;
5948f822 1317 int i;
1ced9da3
LA
1318 char cmd[1024];
1319
1320 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1321
1322 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1323 if (rt->state == RTSP_STATE_PAUSED) {
b17d11c6 1324 cmd[0] = 0;
1ced9da3
LA
1325 } else {
1326 snprintf(cmd, sizeof(cmd),
1ced9da3 1327 "Range: npt=%0.3f-\r\n",
1ced9da3
LA
1328 (double)rt->seek_timestamp / AV_TIME_BASE);
1329 }
b17d11c6 1330 ff_rtsp_send_cmd(s, "PLAY", rt->control_uri, cmd, reply, NULL);
1ced9da3
LA
1331 if (reply->status_code != RTSP_STATUS_OK) {
1332 return -1;
1333 }
5948f822
MS
1334 if (reply->range_start != AV_NOPTS_VALUE &&
1335 rt->transport == RTSP_TRANSPORT_RTP) {
1336 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1337 RTSPStream *rtsp_st = rt->rtsp_streams[i];
1338 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1339 AVStream *st = NULL;
8d168a92
MS
1340 if (!rtpctx)
1341 continue;
5948f822
MS
1342 if (rtsp_st->stream_index >= 0)
1343 st = s->streams[rtsp_st->stream_index];
1344 rtpctx->last_rtcp_ntp_time = AV_NOPTS_VALUE;
1345 rtpctx->first_rtcp_ntp_time = AV_NOPTS_VALUE;
1346 if (st)
1347 rtpctx->range_start_offset = av_rescale_q(reply->range_start,
1348 AV_TIME_BASE_Q,
1349 st->time_base);
1350 }
1351 }
1ced9da3 1352 }
c02fd3d2 1353 rt->state = RTSP_STATE_STREAMING;
1ced9da3
LA
1354 return 0;
1355}
1356
6e69f6c4 1357static int rtsp_setup_input_streams(AVFormatContext *s, RTSPMessageHeader *reply)
e23d195d
MS
1358{
1359 RTSPState *rt = s->priv_data;
e23d195d
MS
1360 char cmd[1024];
1361 unsigned char *content = NULL;
1362 int ret;
1363
1364 /* describe the stream */
1365 snprintf(cmd, sizeof(cmd),
b17d11c6 1366 "Accept: application/sdp\r\n");
e23d195d
MS
1367 if (rt->server_type == RTSP_SERVER_REAL) {
1368 /**
1369 * The Require: attribute is needed for proper streaming from
1370 * Realmedia servers.
1371 */
1372 av_strlcat(cmd,
1373 "Require: com.real.retain-entity-for-setup\r\n",
1374 sizeof(cmd));
1375 }
b17d11c6 1376 ff_rtsp_send_cmd(s, "DESCRIBE", rt->control_uri, cmd, reply, &content);
e23d195d
MS
1377 if (!content)
1378 return AVERROR_INVALIDDATA;
1379 if (reply->status_code != RTSP_STATUS_OK) {
1380 av_freep(&content);
1381 return AVERROR_INVALIDDATA;
1382 }
1383
1384 /* now we got the SDP description, we parse it */
1385 ret = sdp_parse(s, (const char *)content);
1386 av_freep(&content);
1387 if (ret < 0)
1388 return AVERROR_INVALIDDATA;
1389
1390 return 0;
1391}
1392
26cb700c 1393static int rtsp_setup_output_streams(AVFormatContext *s, const char *addr)
3e24c770
MS
1394{
1395 RTSPState *rt = s->priv_data;
1396 RTSPMessageHeader reply1, *reply = &reply1;
3e24c770
MS
1397 int i;
1398 char *sdp;
26cb700c 1399 AVFormatContext sdp_ctx, *ctx_array[1];
c07c6f81
MS
1400
1401 rt->start_time = av_gettime();
3e24c770
MS
1402
1403 /* Announce the stream */
3e24c770
MS
1404 sdp = av_mallocz(8192);
1405 if (sdp == NULL)
1406 return AVERROR(ENOMEM);
26cb700c
MS
1407 /* We create the SDP based on the RTSP AVFormatContext where we
1408 * aren't allowed to change the filename field. (We create the SDP
1409 * based on the RTSP context since the contexts for the RTP streams
1410 * don't exist yet.) In order to specify a custom URL with the actual
1411 * peer IP instead of the originally specified hostname, we create
1412 * a temporary copy of the AVFormatContext, where the custom URL is set.
1413 *
1414 * FIXME: Create the SDP without copying the AVFormatContext.
1415 * This either requires setting up the RTP stream AVFormatContexts
1416 * already here (complicating things immensely) or getting a more
1417 * flexible SDP creation interface.
1418 */
1419 sdp_ctx = *s;
1420 ff_url_join(sdp_ctx.filename, sizeof(sdp_ctx.filename),
1421 "rtsp", NULL, addr, -1, NULL);
1422 ctx_array[0] = &sdp_ctx;
1423 if (avf_sdp_create(ctx_array, 1, sdp, 8192)) {
3e24c770
MS
1424 av_free(sdp);
1425 return AVERROR_INVALIDDATA;
1426 }
1427 av_log(s, AV_LOG_INFO, "SDP:\n%s\n", sdp);
b17d11c6
MS
1428 ff_rtsp_send_cmd_with_content(s, "ANNOUNCE", rt->control_uri,
1429 "Content-Type: application/sdp\r\n",
1430 reply, NULL, sdp, strlen(sdp));
3e24c770
MS
1431 av_free(sdp);
1432 if (reply->status_code != RTSP_STATUS_OK)
1433 return AVERROR_INVALIDDATA;
1434
1435 /* Set up the RTSPStreams for each AVStream */
1436 for (i = 0; i < s->nb_streams; i++) {
1437 RTSPStream *rtsp_st;
1438 AVStream *st = s->streams[i];
1439
1440 rtsp_st = av_mallocz(sizeof(RTSPStream));
1441 if (!rtsp_st)
1442 return AVERROR(ENOMEM);
1443 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
1444
1445 st->priv_data = rtsp_st;
1446 rtsp_st->stream_index = i;
1447
db76ca7f 1448 av_strlcpy(rtsp_st->control_url, rt->control_uri, sizeof(rtsp_st->control_url));
3e24c770
MS
1449 /* Note, this must match the relative uri set in the sdp content */
1450 av_strlcatf(rtsp_st->control_url, sizeof(rtsp_st->control_url),
1451 "/streamid=%d", i);
1452 }
1453
1454 return 0;
1455}
1456
3307e6ea 1457int ff_rtsp_connect(AVFormatContext *s)
53620bba
RB
1458{
1459 RTSPState *rt = s->priv_data;
921da217
LB
1460 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1461 char *option_list, *option, *filename;
53620bba 1462 URLContext *rtsp_hd;
03f8fc08 1463 int port, err, tcp_fd;
3370289a 1464 RTSPMessageHeader reply1 = {}, *reply = &reply1;
90abbdba 1465 int lower_transport_mask = 0;
1cf151e9 1466 char real_challenge[64];
03f8fc08
MS
1467 struct sockaddr_storage peer;
1468 socklen_t peer_len = sizeof(peer);
57b5555c
MS
1469
1470 if (!ff_network_init())
1471 return AVERROR(EIO);
c8965800 1472redirect:
53620bba 1473 /* extract hostname and port */
c5c6e67c 1474 ff_url_split(NULL, 0, auth, sizeof(auth),
f984dcf6 1475 host, sizeof(host), &port, path, sizeof(path), s->filename);
f9337897 1476 if (*auth) {
aa8bf2fb 1477 av_strlcpy(rt->auth, auth, sizeof(rt->auth));
f9337897 1478 }
53620bba
RB
1479 if (port < 0)
1480 port = RTSP_DEFAULT_PORT;
1481
1482 /* search for options */
602eb779 1483 option_list = strrchr(path, '?');
53620bba 1484 if (option_list) {
2a21adf9
MS
1485 /* Strip out the RTSP specific options, write out the rest of
1486 * the options back into the same string. */
1487 filename = option_list;
c8965800 1488 while (option_list) {
53620bba 1489 /* move the option pointer */
921da217 1490 option = ++option_list;
53620bba
RB
1491 option_list = strchr(option_list, '&');
1492 if (option_list)
921da217
LB
1493 *option_list = 0;
1494
53620bba 1495 /* handle the options */
c8965800 1496 if (!strcmp(option, "udp")) {
7a033e08 1497 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP);
c8965800 1498 } else if (!strcmp(option, "multicast")) {
7a033e08 1499 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
c8965800 1500 } else if (!strcmp(option, "tcp")) {
7a033e08 1501 lower_transport_mask |= (1<< RTSP_LOWER_TRANSPORT_TCP);
c8965800 1502 } else {
2a21adf9
MS
1503 /* Write options back into the buffer, using memmove instead
1504 * of strcpy since the strings may overlap. */
1505 int len = strlen(option);
1506 memmove(++filename, option, len);
1507 filename += len;
921da217
LB
1508 if (option_list) *filename = '&';
1509 }
53620bba 1510 }
921da217 1511 *filename = 0;
53620bba
RB
1512 }
1513
90abbdba 1514 if (!lower_transport_mask)
2a1d51c5 1515 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
53620bba 1516
3e24c770 1517 if (s->oformat) {
b7dc88fc
MS
1518 /* Only UDP or TCP - UDP multicast isn't supported. */
1519 lower_transport_mask &= (1 << RTSP_LOWER_TRANSPORT_UDP) |
1520 (1 << RTSP_LOWER_TRANSPORT_TCP);
3e24c770
MS
1521 if (!lower_transport_mask) {
1522 av_log(s, AV_LOG_ERROR, "Unsupported lower transport method, "
b7dc88fc 1523 "only UDP and TCP are supported for output.\n");
3e24c770
MS
1524 err = AVERROR(EINVAL);
1525 goto fail;
1526 }
1527 }
1528
4bc5cc23
MS
1529 /* Construct the URI used in request; this is similar to s->filename,
1530 * but with authentication credentials removed and RTSP specific options
1531 * stripped out. */
1532 ff_url_join(rt->control_uri, sizeof(rt->control_uri), "rtsp", NULL,
1533 host, port, "%s", path);
1534
53620bba 1535 /* open the tcp connexion */
57b5555c 1536 ff_url_join(tcpname, sizeof(tcpname), "tcp", NULL, host, port, NULL);
f9337897
RB
1537 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1538 err = AVERROR(EIO);
1539 goto fail;
1540 }
53620bba
RB
1541 rt->rtsp_hd = rtsp_hd;
1542 rt->seq = 0;
1543
03f8fc08
MS
1544 tcp_fd = url_get_file_handle(rtsp_hd);
1545 if (!getpeername(tcp_fd, (struct sockaddr*) &peer, &peer_len)) {
1546 getnameinfo((struct sockaddr*) &peer, peer_len, host, sizeof(host),
1547 NULL, 0, NI_NUMERICHOST);
1548 }
1549
c8965800
RB
1550 /* request options supported by the server; this also detects server
1551 * type */
1cf151e9 1552 for (rt->server_type = RTSP_SERVER_RTP;;) {
b17d11c6 1553 cmd[0] = 0;
2e889ae4 1554 if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9
RB
1555 av_strlcat(cmd,
1556 /**
1557 * The following entries are required for proper
1558 * streaming from a Realmedia server. They are
1559 * interdependent in some way although we currently
1560 * don't quite understand how. Values were copied
1561 * from mplayer SVN r23589.
1562 * @param CompanyID is a 16-byte ID in base64
1563 * @param ClientChallenge is a 16-byte ID in hex
1564 */
1565 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1566 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1567 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1568 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1569 sizeof(cmd));
b17d11c6 1570 ff_rtsp_send_cmd(s, "OPTIONS", rt->control_uri, cmd, reply, NULL);
1cf151e9
RB
1571 if (reply->status_code != RTSP_STATUS_OK) {
1572 err = AVERROR_INVALIDDATA;
1573 goto fail;
1574 }
1575
1576 /* detect server type if not standard-compliant RTP */
2e889ae4
RB
1577 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1578 rt->server_type = RTSP_SERVER_REAL;
1cf151e9 1579 continue;
7a86bafa
RB
1580 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1581 rt->server_type = RTSP_SERVER_WMS;
c8965800 1582 } else if (rt->server_type == RTSP_SERVER_REAL)
1cf151e9 1583 strcpy(real_challenge, reply->real_challenge);
1cf151e9
RB
1584 break;
1585 }
1586
3e24c770 1587 if (s->iformat)
6e69f6c4 1588 err = rtsp_setup_input_streams(s, reply);
3e24c770 1589 else
26cb700c 1590 err = rtsp_setup_output_streams(s, host);
e23d195d 1591 if (err)
53620bba 1592 goto fail;
53620bba 1593
8a8754d8 1594 do {
c8965800
RB
1595 int lower_transport = ff_log2_tab[lower_transport_mask &
1596 ~(lower_transport_mask - 1)];
8a8754d8 1597
90abbdba 1598 err = make_setup_request(s, host, port, lower_transport,
2e889ae4 1599 rt->server_type == RTSP_SERVER_REAL ?
e9dea59f 1600 real_challenge : NULL);
8a8754d8 1601 if (err < 0)
7e6ca34f 1602 goto fail;
90abbdba
RB
1603 lower_transport_mask &= ~(1 << lower_transport);
1604 if (lower_transport_mask == 0 && err == 1) {
adef229e 1605 err = FF_NETERROR(EPROTONOSUPPORT);
8a8754d8
RB
1606 goto fail;
1607 }
1608 } while (err);
53620bba 1609
ff762d6e 1610 rt->state = RTSP_STATE_IDLE;
c8965800 1611 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1617ad97
FB
1612 return 0;
1613 fail:
3307e6ea 1614 ff_rtsp_close_streams(s);
1617ad97 1615 url_close(rt->rtsp_hd);
35cfd646 1616 if (reply->status_code >=300 && reply->status_code < 400 && s->iformat) {
d243ba30
LB
1617 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1618 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1619 reply->status_code,
1620 s->filename);
1621 goto redirect;
1622 }
57b5555c 1623 ff_network_close();
1617ad97
FB
1624 return err;
1625}
6f5a3d0a 1626#endif
1617ad97 1627
6f5a3d0a 1628#if CONFIG_RTSP_DEMUXER
4280f9bb
MS
1629static int rtsp_read_header(AVFormatContext *s,
1630 AVFormatParameters *ap)
1631{
1632 RTSPState *rt = s->priv_data;
1633 int ret;
1634
3307e6ea 1635 ret = ff_rtsp_connect(s);
4280f9bb
MS
1636 if (ret)
1637 return ret;
1638
1639 if (ap->initial_pause) {
1640 /* do not start immediately */
1641 } else {
1642 if (rtsp_read_play(s) < 0) {
3307e6ea 1643 ff_rtsp_close_streams(s);
4280f9bb
MS
1644 url_close(rt->rtsp_hd);
1645 return AVERROR_INVALIDDATA;
1646 }
1647 }
1648
1649 return 0;
1650}
1651
0e59034e
RB
1652static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1653 uint8_t *buf, int buf_size)
1654{
1655 RTSPState *rt = s->priv_data;
1656 RTSPStream *rtsp_st;
1657 fd_set rfds;
9cba6f5f 1658 int fd, fd_max, n, i, ret, tcp_fd, timeout_cnt = 0;
0e59034e
RB
1659 struct timeval tv;
1660
c8965800 1661 for (;;) {
0e59034e
RB
1662 if (url_interrupt_cb())
1663 return AVERROR(EINTR);
1664 FD_ZERO(&rfds);
1665 if (rt->rtsp_hd) {
1666 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1667 FD_SET(tcp_fd, &rfds);
1668 } else {
1669 fd_max = 0;
1670 tcp_fd = -1;
1671 }
c8965800 1672 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1673 rtsp_st = rt->rtsp_streams[i];
1674 if (rtsp_st->rtp_handle) {
1675 /* currently, we cannot probe RTCP handle because of
1676 * blocking restrictions */
1677 fd = url_get_file_handle(rtsp_st->rtp_handle);
1678 if (fd > fd_max)
1679 fd_max = fd;
1680 FD_SET(fd, &rfds);
1681 }
1682 }
1683 tv.tv_sec = 0;
9cba6f5f 1684 tv.tv_usec = SELECT_TIMEOUT_MS * 1000;
0e59034e
RB
1685 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1686 if (n > 0) {
9cba6f5f 1687 timeout_cnt = 0;
c8965800 1688 for (i = 0; i < rt->nb_rtsp_streams; i++) {
0e59034e
RB
1689 rtsp_st = rt->rtsp_streams[i];
1690 if (rtsp_st->rtp_handle) {
1691 fd = url_get_file_handle(rtsp_st->rtp_handle);
1692 if (FD_ISSET(fd, &rfds)) {
1693 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1694 if (ret > 0) {
1695 *prtsp_st = rtsp_st;
1696 return ret;
1697 }
1698 }
1699 }
1700 }
1701#if CONFIG_RTSP_DEMUXER
27000636 1702 if (tcp_fd != -1 && FD_ISSET(tcp_fd, &rfds)) {
0e59034e
RB
1703 RTSPMessageHeader reply;
1704
3032276b
MS
1705 ret = ff_rtsp_read_reply(s, &reply, NULL, 0);
1706 if (ret < 0)
1707 return ret;
0e59034e 1708 /* XXX: parse message */
c02fd3d2 1709 if (rt->state != RTSP_STATE_STREAMING)
0e59034e
RB
1710 return 0;
1711 }
1712#endif
9cba6f5f 1713 } else if (n == 0 && ++timeout_cnt >= MAX_TIMEOUTS) {
4aecee7f 1714 return FF_NETERROR(ETIMEDOUT);
9cba6f5f
SG
1715 } else if (n < 0 && errno != EINTR)
1716 return AVERROR(errno);
0e59034e
RB
1717 }
1718}
1719
8b1ab7bf
FB
1720static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1721 uint8_t *buf, int buf_size)
1617ad97
FB
1722{
1723 RTSPState *rt = s->priv_data;
b6892136 1724 int id, len, i, ret;
1617ad97 1725 RTSPStream *rtsp_st;
1617ad97 1726
b6892136 1727#ifdef DEBUG_RTP_TCP
67c9cd69 1728 dprintf(s, "tcp_read_packet:\n");
b6892136 1729#endif
c8965800
RB
1730redo:
1731 for (;;) {
7e726132
RB
1732 RTSPMessageHeader reply;
1733
3307e6ea 1734 ret = ff_rtsp_read_reply(s, &reply, NULL, 1);
7e726132 1735 if (ret == -1)
8b1ab7bf 1736 return -1;
7e726132 1737 if (ret == 1) /* received '$' */
1617ad97 1738 break;
7e726132 1739 /* XXX: parse message */
c02fd3d2 1740 if (rt->state != RTSP_STATE_STREAMING)
fccb1770 1741 return 0;
1617ad97 1742 }
0e848977 1743 ret = url_read_complete(rt->rtsp_hd, buf, 3);
b6892136 1744 if (ret != 3)
8b1ab7bf 1745 return -1;
c8965800 1746 id = buf[0];
80fb8234 1747 len = AV_RB16(buf + 1);
b6892136 1748#ifdef DEBUG_RTP_TCP
67c9cd69 1749 dprintf(s, "id=%d len=%d\n", id, len);
b6892136 1750#endif
8b1ab7bf 1751 if (len > buf_size || len < 12)
1617ad97
FB
1752 goto redo;
1753 /* get the data */
0e848977 1754 ret = url_read_complete(rt->rtsp_hd, buf, len);
b6892136 1755 if (ret != len)
8b1ab7bf 1756 return -1;
985b05d3 1757 if (rt->transport == RTSP_TRANSPORT_RDT &&
114732f4 1758 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
985b05d3 1759 return -1;
115329f1 1760
1617ad97 1761 /* find the matching stream */
c8965800 1762 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 1763 rtsp_st = rt->rtsp_streams[i];
115329f1
DB
1764 if (id >= rtsp_st->interleaved_min &&
1765 id <= rtsp_st->interleaved_max)
1617ad97
FB
1766 goto found;
1767 }
1768 goto redo;
c8965800 1769found:
8b1ab7bf
FB
1770 *prtsp_st = rtsp_st;
1771 return len;
1617ad97
FB
1772}
1773
0e59034e
RB
1774static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1775{
1776 RTSPState *rt = s->priv_data;
1777 int ret, len;
1778 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1779 RTSPStream *rtsp_st;
1780
1781 /* get next frames from the same RTP packet */
1782 if (rt->cur_transport_priv) {
c8965800 1783 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1784 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
c8965800 1785 } else
0e59034e
RB
1786 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1787 if (ret == 0) {
1788 rt->cur_transport_priv = NULL;
1789 return 0;
1790 } else if (ret == 1) {
1791 return 0;
c8965800 1792 } else
0e59034e 1793 rt->cur_transport_priv = NULL;
0e59034e
RB
1794 }
1795
1796 /* read next RTP packet */
1797 redo:
1798 switch(rt->lower_transport) {
1799 default:
1800#if CONFIG_RTSP_DEMUXER
1801 case RTSP_LOWER_TRANSPORT_TCP:
1802 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1803 break;
1804#endif
1805 case RTSP_LOWER_TRANSPORT_UDP:
1806 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1807 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1808 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1809 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1810 break;
1811 }
1812 if (len < 0)
1813 return len;
1814 if (len == 0)
1815 return AVERROR_EOF;
c8965800 1816 if (rt->transport == RTSP_TRANSPORT_RDT) {
0e59034e 1817 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
2cab6b48 1818 } else {
0e59034e 1819 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
2cab6b48
MS
1820 if (ret < 0) {
1821 /* Either bad packet, or a RTCP packet. Check if the
1822 * first_rtcp_ntp_time field was initialized. */
1823 RTPDemuxContext *rtpctx = rtsp_st->transport_priv;
1824 if (rtpctx->first_rtcp_ntp_time != AV_NOPTS_VALUE) {
1825 /* first_rtcp_ntp_time has been initialized for this stream,
1826 * copy the same value to all other uninitialized streams,
1827 * in order to map their timestamp origin to the same ntp time
1828 * as this one. */
1829 int i;
1830 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1831 RTPDemuxContext *rtpctx2 = rtsp_st->transport_priv;
1832 if (rtpctx2 &&
1833 rtpctx2->first_rtcp_ntp_time == AV_NOPTS_VALUE)
1834 rtpctx2->first_rtcp_ntp_time = rtpctx->first_rtcp_ntp_time;
1835 }
1836 }
1837 }
1838 }
0e59034e
RB
1839 if (ret < 0)
1840 goto redo;
c8965800 1841 if (ret == 1)
0e59034e
RB
1842 /* more packets may follow, so we save the RTP context */
1843 rt->cur_transport_priv = rtsp_st->transport_priv;
0e59034e
RB
1844
1845 return ret;
1846}
1847
c8965800 1848static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1617ad97
FB
1849{
1850 RTSPState *rt = s->priv_data;
98713182 1851 int ret;
30e79845
RB
1852 RTSPMessageHeader reply1, *reply = &reply1;
1853 char cmd[1024];
8b1ab7bf 1854
572c6a38 1855 if (rt->server_type == RTSP_SERVER_REAL) {
1256d16b 1856 int i;
572c6a38 1857 enum AVDiscard cache[MAX_STREAMS];
1256d16b 1858
572c6a38
RB
1859 for (i = 0; i < s->nb_streams; i++)
1860 cache[i] = s->streams[i]->discard;
1861
1862 if (!rt->need_subscription) {
1863 if (memcmp (cache, rt->real_setup_cache,
1864 sizeof(enum AVDiscard) * s->nb_streams)) {
8b9457de 1865 snprintf(cmd, sizeof(cmd),
7eaa646f 1866 "Unsubscribe: %s\r\n",
b17d11c6
MS
1867 rt->last_subscription);
1868 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1869 cmd, reply, NULL);
572c6a38
RB
1870 if (reply->status_code != RTSP_STATUS_OK)
1871 return AVERROR_INVALIDDATA;
1872 rt->need_subscription = 1;
1873 }
1256d16b 1874 }
1256d16b 1875
572c6a38
RB
1876 if (rt->need_subscription) {
1877 int r, rule_nr, first = 1;
1878
1879 memcpy(rt->real_setup_cache, cache,
1880 sizeof(enum AVDiscard) * s->nb_streams);
1881 rt->last_subscription[0] = 0;
1882
1883 snprintf(cmd, sizeof(cmd),
b17d11c6 1884 "Subscribe: ");
572c6a38
RB
1885 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1886 rule_nr = 0;
1887 for (r = 0; r < s->nb_streams; r++) {
1888 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1889 if (s->streams[r]->discard != AVDISCARD_ALL) {
1890 if (!first)
1891 av_strlcat(rt->last_subscription, ",",
1892 sizeof(rt->last_subscription));
1893 ff_rdt_subscribe_rule(
1894 rt->last_subscription,
1895 sizeof(rt->last_subscription), i, rule_nr);
1896 first = 0;
1897 }
1898 rule_nr++;
1899 }
1900 }
1901 }
1902 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
b17d11c6
MS
1903 ff_rtsp_send_cmd(s, "SET_PARAMETER", rt->control_uri,
1904 cmd, reply, NULL);
572c6a38
RB
1905 if (reply->status_code != RTSP_STATUS_OK)
1906 return AVERROR_INVALIDDATA;
1907 rt->need_subscription = 0;
1908
c02fd3d2 1909 if (rt->state == RTSP_STATE_STREAMING)
572c6a38
RB
1910 rtsp_read_play (s);
1911 }
1256d16b
RB
1912 }
1913
d7250724 1914 ret = rtsp_fetch_packet(s, pkt);
c8965800 1915 if (ret < 0)
98713182 1916 return ret;
30e79845
RB
1917
1918 /* send dummy request to keep TCP connection alive */
1919 if ((rt->server_type == RTSP_SERVER_WMS ||
1920 rt->server_type == RTSP_SERVER_REAL) &&
1921 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1922 if (rt->server_type == RTSP_SERVER_WMS) {
b17d11c6 1923 ff_rtsp_send_cmd_async(s, "GET_PARAMETER", rt->control_uri, NULL);
30e79845 1924 } else {
b17d11c6 1925 ff_rtsp_send_cmd_async(s, "OPTIONS", "*", NULL);
30e79845
RB
1926 }
1927 }
1928
8b1ab7bf 1929 return 0;
1617ad97
FB
1930}
1931
ff762d6e
FB
1932/* pause the stream */
1933static int rtsp_read_pause(AVFormatContext *s)
b7b8fc34 1934{
ff762d6e 1935 RTSPState *rt = s->priv_data;
a9e534d5 1936 RTSPMessageHeader reply1, *reply = &reply1;
b7b8fc34 1937
c02fd3d2 1938 if (rt->state != RTSP_STATE_STREAMING)
ff762d6e 1939 return 0;
2e889ae4 1940 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
b17d11c6 1941 ff_rtsp_send_cmd(s, "PAUSE", rt->control_uri, NULL, reply, NULL);
99b2ac07
RB
1942 if (reply->status_code != RTSP_STATUS_OK) {
1943 return -1;
1944 }
1256d16b 1945 }
5f86057f
RB
1946 rt->state = RTSP_STATE_PAUSED;
1947 return 0;
b7b8fc34
FB
1948}
1949
115329f1 1950static int rtsp_read_seek(AVFormatContext *s, int stream_index,
7b3c1382 1951 int64_t timestamp, int flags)
ff762d6e
FB
1952{
1953 RTSPState *rt = s->priv_data;
115329f1 1954
c8965800
RB
1955 rt->seek_timestamp = av_rescale_q(timestamp,
1956 s->streams[stream_index]->time_base,
1957 AV_TIME_BASE_Q);
ff762d6e
FB
1958 switch(rt->state) {
1959 default:
1960 case RTSP_STATE_IDLE:
1961 break;
c02fd3d2 1962 case RTSP_STATE_STREAMING:
ec606b36
LB
1963 if (rtsp_read_pause(s) != 0)
1964 return -1;
1965 rt->state = RTSP_STATE_SEEKING;
ff762d6e
FB
1966 if (rtsp_read_play(s) != 0)
1967 return -1;
1968 break;
1969 case RTSP_STATE_PAUSED:
1970 rt->state = RTSP_STATE_IDLE;
1971 break;
1972 }
1973 return 0;
1974}
1975
1617ad97
FB
1976static int rtsp_read_close(AVFormatContext *s)
1977{
1978 RTSPState *rt = s->priv_data;
1617ad97 1979
b6892136 1980#if 0
1617ad97 1981 /* NOTE: it is valid to flush the buffer here */
90abbdba 1982 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1617ad97
FB
1983 url_fclose(&rt->rtsp_gb);
1984 }
b6892136 1985#endif
b17d11c6 1986 ff_rtsp_send_cmd_async(s, "TEARDOWN", rt->control_uri, NULL);
1617ad97 1987
3307e6ea 1988 ff_rtsp_close_streams(s);
1617ad97 1989 url_close(rt->rtsp_hd);
57b5555c 1990 ff_network_close();
1617ad97
FB
1991 return 0;
1992}
1993
d2a067d1 1994AVInputFormat rtsp_demuxer = {
1617ad97 1995 "rtsp",
bde15e74 1996 NULL_IF_CONFIG_SMALL("RTSP input format"),
1617ad97
FB
1997 sizeof(RTSPState),
1998 rtsp_probe,
1999 rtsp_read_header,
2000 rtsp_read_packet,
2001 rtsp_read_close,
ff762d6e 2002 rtsp_read_seek,
bb76a117 2003 .flags = AVFMT_NOFILE,
ff762d6e
FB
2004 .read_play = rtsp_read_play,
2005 .read_pause = rtsp_read_pause,
1617ad97 2006};
96862926 2007#endif
1617ad97 2008
cb1fdc61 2009static int sdp_probe(AVProbeData *p1)
93ced3e8 2010{
0e1ceacd 2011 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
cb1fdc61
FB
2012
2013 /* we look for a line beginning "c=IN IP4" */
0e1ceacd 2014 while (p < p_end && *p != '\0') {
c8965800
RB
2015 if (p + sizeof("c=IN IP4") - 1 < p_end &&
2016 av_strstart(p, "c=IN IP4", NULL))
cb1fdc61 2017 return AVPROBE_SCORE_MAX / 2;
0e1ceacd 2018
c8965800 2019 while (p < p_end - 1 && *p != '\n') p++;
0e1ceacd 2020 if (++p >= p_end)
cb1fdc61 2021 break;
cb1fdc61
FB
2022 if (*p == '\r')
2023 p++;
2024 }
93ced3e8
FB
2025 return 0;
2026}
2027
2028#define SDP_MAX_SIZE 8192
2029
c8965800 2030static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
93ced3e8 2031{
8b1ab7bf 2032 RTSPState *rt = s->priv_data;
93ced3e8
FB
2033 RTSPStream *rtsp_st;
2034 int size, i, err;
2035 char *content;
2036 char url[1024];
2037
57b5555c
MS
2038 if (!ff_network_init())
2039 return AVERROR(EIO);
2040
93ced3e8
FB
2041 /* read the whole sdp file */
2042 /* XXX: better loading */
2043 content = av_malloc(SDP_MAX_SIZE);
899681cd 2044 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
93ced3e8
FB
2045 if (size <= 0) {
2046 av_free(content);
2047 return AVERROR_INVALIDDATA;
2048 }
2049 content[size] ='\0';
2050
2051 sdp_parse(s, content);
2052 av_free(content);
2053
2054 /* open each RTP stream */
c8965800 2055 for (i = 0; i < rt->nb_rtsp_streams; i++) {
8b1ab7bf 2056 rtsp_st = rt->rtsp_streams[i];
115329f1 2057
57b5555c
MS
2058 ff_url_join(url, sizeof(url), "rtp", NULL,
2059 inet_ntoa(rtsp_st->sdp_ip), rtsp_st->sdp_port,
2060 "?localport=%d&ttl=%d", rtsp_st->sdp_port,
2061 rtsp_st->sdp_ttl);
dbf30963 2062 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
93ced3e8
FB
2063 err = AVERROR_INVALIDDATA;
2064 goto fail;
2065 }
ee0cb67f 2066 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
8b1ab7bf 2067 goto fail;
93ced3e8
FB
2068 }
2069 return 0;
c8965800 2070fail:
3307e6ea 2071 ff_rtsp_close_streams(s);
57b5555c 2072 ff_network_close();
93ced3e8
FB
2073 return err;
2074}
2075
93ced3e8
FB
2076static int sdp_read_close(AVFormatContext *s)
2077{
3307e6ea 2078 ff_rtsp_close_streams(s);
57b5555c 2079 ff_network_close();
93ced3e8
FB
2080 return 0;
2081}
2082
ff70e601 2083AVInputFormat sdp_demuxer = {
93ced3e8 2084 "sdp",
bde15e74 2085 NULL_IF_CONFIG_SMALL("SDP"),
93ced3e8
FB
2086 sizeof(RTSPState),
2087 sdp_probe,
2088 sdp_read_header,
d7250724 2089 rtsp_fetch_packet,
93ced3e8
FB
2090 sdp_read_close,
2091};