3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 /* needed by inet_aton() */
25 #include "libavutil/avstring.h"
26 #include "libavutil/intreadwrite.h"
31 #include <sys/select.h>
42 //#define DEBUG_RTP_TCP
44 static int rtsp_read_play(AVFormatContext *s);
46 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
47 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
50 static int rtsp_probe(AVProbeData *p)
52 if (av_strstart(p->filename, "rtsp:", NULL))
53 return AVPROBE_SCORE_MAX;
57 #define SPACE_CHARS " \t\r\n"
58 #define redir_isspace(c) strchr(SPACE_CHARS, c)
59 static void skip_spaces(const char **pp)
63 while (redir_isspace(*p))
68 static void get_word_until_chars(char *buf, int buf_size,
69 const char *sep, const char **pp)
77 while (!strchr(sep, *p) && *p != '\0') {
78 if ((q - buf) < buf_size - 1)
87 static void get_word_sep(char *buf, int buf_size, const char *sep,
90 if (**pp == '/') (*pp)++;
91 get_word_until_chars(buf, buf_size, sep, pp);
94 static void get_word(char *buf, int buf_size, const char **pp)
96 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
99 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
101 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
108 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
109 see if we can handle this kind of payload */
110 get_word_sep(buf, sizeof(buf), "/", &p);
111 if (payload_type >= RTP_PT_PRIVATE) {
112 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
114 if (!strcasecmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
115 codec->codec_id = handler->codec_id;
116 rtsp_st->dynamic_handler= handler;
118 rtsp_st->dynamic_protocol_context= handler->open();
122 handler= handler->next;
125 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
126 /* search into AVRtpPayloadTypes[] */
127 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
130 c = avcodec_find_decoder(codec->codec_id);
134 c_name = (char *)NULL;
137 get_word_sep(buf, sizeof(buf), "/", &p);
139 switch (codec->codec_type) {
140 case CODEC_TYPE_AUDIO:
141 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
142 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
143 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
145 codec->sample_rate = i;
146 get_word_sep(buf, sizeof(buf), "/", &p);
150 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
151 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
153 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
154 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
156 case CODEC_TYPE_VIDEO:
157 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
168 /* return the length and optionnaly the data */
169 static int hex_to_data(uint8_t *data, const char *p)
179 c = toupper((unsigned char)*p++);
180 if (c >= '0' && c <= '9')
182 else if (c >= 'A' && c <= 'F')
197 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
199 switch (codec->codec_id) {
202 if (!strcmp(attr, "config")) {
203 /* decode the hexa encoded parameter */
204 int len = hex_to_data(NULL, value);
205 if (codec->extradata)
206 av_free(codec->extradata);
207 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
208 if (!codec->extradata)
210 codec->extradata_size = len;
211 hex_to_data(codec->extradata, value);
226 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
227 #define ATTR_NAME_TYPE_INT 0
228 #define ATTR_NAME_TYPE_STR 1
229 static const AttrNameMap attr_names[]=
231 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
232 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
233 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
234 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
235 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
236 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
240 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
241 * because it is used in rtp_h264.c, which is forthcoming.
243 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
247 get_word_sep(attr, attr_size, "=", p);
250 get_word_sep(value, value_size, ";", p);
258 /* parse a SDP line and save stream attributes */
259 static void sdp_parse_fmtp(AVStream *st, const char *p)
265 RTSPStream *rtsp_st = st->priv_data;
266 AVCodecContext *codec = st->codec;
267 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
269 /* loop on each attribute */
270 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
272 /* grab the codec extra_data from the config parameter of the fmtp line */
273 sdp_parse_fmtp_config(codec, attr, value);
274 /* Looking for a known attribute */
275 for (i = 0; attr_names[i].str; ++i) {
276 if (!strcasecmp(attr, attr_names[i].str)) {
277 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
278 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
279 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
280 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
286 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
288 * Used for seeking in the rtp stream.
290 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
295 if (!av_stristart(p, "npt=", &p))
298 *start = AV_NOPTS_VALUE;
299 *end = AV_NOPTS_VALUE;
301 get_word_sep(buf, sizeof(buf), "-", &p);
302 *start = parse_date(buf, 1);
305 get_word_sep(buf, sizeof(buf), "-", &p);
306 *end = parse_date(buf, 1);
308 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
309 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
312 typedef struct SDPParseState {
314 struct in_addr default_ip;
316 int skip_media; ///< set if an unknown m= line occurs
319 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
320 int letter, const char *buf)
322 RTSPState *rt = s->priv_data;
323 char buf1[64], st_type[64];
325 enum CodecType codec_type;
329 struct in_addr sdp_ip;
333 printf("sdp: %c='%s'\n", letter, buf);
337 if (s1->skip_media && letter != 'm')
341 get_word(buf1, sizeof(buf1), &p);
342 if (strcmp(buf1, "IN") != 0)
344 get_word(buf1, sizeof(buf1), &p);
345 if (strcmp(buf1, "IP4") != 0)
347 get_word_sep(buf1, sizeof(buf1), "/", &p);
348 if (inet_aton(buf1, &sdp_ip) == 0)
353 get_word_sep(buf1, sizeof(buf1), "/", &p);
356 if (s->nb_streams == 0) {
357 s1->default_ip = sdp_ip;
358 s1->default_ttl = ttl;
360 st = s->streams[s->nb_streams - 1];
361 rtsp_st = st->priv_data;
362 rtsp_st->sdp_ip = sdp_ip;
363 rtsp_st->sdp_ttl = ttl;
367 av_metadata_set(&s->metadata, "title", p);
370 if (s->nb_streams == 0) {
371 av_metadata_set(&s->metadata, "comment", p);
378 get_word(st_type, sizeof(st_type), &p);
379 if (!strcmp(st_type, "audio")) {
380 codec_type = CODEC_TYPE_AUDIO;
381 } else if (!strcmp(st_type, "video")) {
382 codec_type = CODEC_TYPE_VIDEO;
383 } else if (!strcmp(st_type, "application")) {
384 codec_type = CODEC_TYPE_DATA;
389 rtsp_st = av_mallocz(sizeof(RTSPStream));
392 rtsp_st->stream_index = -1;
393 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
395 rtsp_st->sdp_ip = s1->default_ip;
396 rtsp_st->sdp_ttl = s1->default_ttl;
398 get_word(buf1, sizeof(buf1), &p); /* port */
399 rtsp_st->sdp_port = atoi(buf1);
401 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
403 /* XXX: handle list of formats */
404 get_word(buf1, sizeof(buf1), &p); /* format list */
405 rtsp_st->sdp_payload_type = atoi(buf1);
407 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
408 /* no corresponding stream */
410 st = av_new_stream(s, 0);
413 st->priv_data = rtsp_st;
414 rtsp_st->stream_index = st->index;
415 st->codec->codec_type = codec_type;
416 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
417 /* if standard payload type, we can find the codec right now */
418 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
421 /* put a default control url */
422 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
425 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
427 /* get the control url */
428 st = s->streams[s->nb_streams - 1];
429 rtsp_st = st->priv_data;
431 /* XXX: may need to add full url resolution */
432 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
433 if (proto[0] == '\0') {
434 /* relative control URL */
435 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
436 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
438 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
440 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
441 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
442 get_word(buf1, sizeof(buf1), &p);
443 payload_type = atoi(buf1);
444 st = s->streams[s->nb_streams - 1];
445 rtsp_st = st->priv_data;
446 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
447 } else if (av_strstart(p, "fmtp:", &p)) {
448 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
449 get_word(buf1, sizeof(buf1), &p);
450 payload_type = atoi(buf1);
451 for(i = 0; i < s->nb_streams;i++) {
453 rtsp_st = st->priv_data;
454 if (rtsp_st->sdp_payload_type == payload_type) {
455 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
456 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
457 sdp_parse_fmtp(st, p);
460 sdp_parse_fmtp(st, p);
464 } else if(av_strstart(p, "framesize:", &p)) {
465 // let dynamic protocol handlers have a stab at the line.
466 get_word(buf1, sizeof(buf1), &p);
467 payload_type = atoi(buf1);
468 for(i = 0; i < s->nb_streams;i++) {
470 rtsp_st = st->priv_data;
471 if (rtsp_st->sdp_payload_type == payload_type) {
472 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
473 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
477 } else if(av_strstart(p, "range:", &p)) {
480 // this is so that seeking on a streamed file can work.
481 rtsp_parse_range_npt(p, &start, &end);
482 s->start_time= start;
483 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
484 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
486 rt->transport = RTSP_TRANSPORT_RDT;
488 if (rt->server_type == RTSP_SERVER_WMS)
489 ff_wms_parse_sdp_a_line(s, p);
490 if (s->nb_streams > 0) {
491 if (rt->server_type == RTSP_SERVER_REAL)
492 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
494 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
495 if (rtsp_st->dynamic_handler &&
496 rtsp_st->dynamic_handler->parse_sdp_a_line)
497 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
498 rtsp_st->dynamic_protocol_context, buf);
505 static int sdp_parse(AVFormatContext *s, const char *content)
509 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
510 * contain long SDP lines containing complete ASF Headers (several
511 * kB) or arrays of MDPR (RM stream descriptor) headers plus
512 * "rulebooks" describing their properties. Therefore, the SDP line
513 * buffer is large. */
515 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
517 memset(s1, 0, sizeof(SDPParseState));
528 /* get the content */
530 while (*p != '\n' && *p != '\r' && *p != '\0') {
531 if ((q - buf) < sizeof(buf) - 1)
536 sdp_parse_line(s, s1, letter, buf);
538 while (*p != '\n' && *p != '\0')
546 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
553 v = strtol(p, (char **)&p, 10);
557 v = strtol(p, (char **)&p, 10);
566 /* XXX: only one transport specification is parsed */
567 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
569 char transport_protocol[16];
571 char lower_transport[16];
573 RTSPTransportField *th;
576 reply->nb_transports = 0;
583 th = &reply->transports[reply->nb_transports];
585 get_word_sep(transport_protocol, sizeof(transport_protocol),
587 if (!strcasecmp (transport_protocol, "rtp")) {
588 get_word_sep(profile, sizeof(profile), "/;,", &p);
589 lower_transport[0] = '\0';
590 /* rtp/avp/<protocol> */
592 get_word_sep(lower_transport, sizeof(lower_transport),
595 th->transport = RTSP_TRANSPORT_RTP;
596 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
597 !strcasecmp (transport_protocol, "x-real-rdt")) {
598 /* x-pn-tng/<protocol> */
599 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
601 th->transport = RTSP_TRANSPORT_RDT;
603 if (!strcasecmp(lower_transport, "TCP"))
604 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
606 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
610 /* get each parameter */
611 while (*p != '\0' && *p != ',') {
612 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
613 if (!strcmp(parameter, "port")) {
616 rtsp_parse_range(&th->port_min, &th->port_max, &p);
618 } else if (!strcmp(parameter, "client_port")) {
621 rtsp_parse_range(&th->client_port_min,
622 &th->client_port_max, &p);
624 } else if (!strcmp(parameter, "server_port")) {
627 rtsp_parse_range(&th->server_port_min,
628 &th->server_port_max, &p);
630 } else if (!strcmp(parameter, "interleaved")) {
633 rtsp_parse_range(&th->interleaved_min,
634 &th->interleaved_max, &p);
636 } else if (!strcmp(parameter, "multicast")) {
637 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
638 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
639 } else if (!strcmp(parameter, "ttl")) {
642 th->ttl = strtol(p, (char **)&p, 10);
644 } else if (!strcmp(parameter, "destination")) {
645 struct in_addr ipaddr;
649 get_word_sep(buf, sizeof(buf), ";,", &p);
650 if (inet_aton(buf, &ipaddr))
651 th->destination = ntohl(ipaddr.s_addr);
654 while (*p != ';' && *p != '\0' && *p != ',')
662 reply->nb_transports++;
666 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
670 /* NOTE: we do case independent match for broken servers */
672 if (av_stristart(p, "Session:", &p)) {
673 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
674 } else if (av_stristart(p, "Content-Length:", &p)) {
675 reply->content_length = strtol(p, NULL, 10);
676 } else if (av_stristart(p, "Transport:", &p)) {
677 rtsp_parse_transport(reply, p);
678 } else if (av_stristart(p, "CSeq:", &p)) {
679 reply->seq = strtol(p, NULL, 10);
680 } else if (av_stristart(p, "Range:", &p)) {
681 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
682 } else if (av_stristart(p, "RealChallenge1:", &p)) {
684 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
685 } else if (av_stristart(p, "Server:", &p)) {
687 av_strlcpy(reply->server, p, sizeof(reply->server));
691 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
697 ret = url_read(h, buf+len, size-len);
705 /* skip a RTP/TCP interleaved packet */
706 static void rtsp_skip_packet(AVFormatContext *s)
708 RTSPState *rt = s->priv_data;
712 ret = url_readbuf(rt->rtsp_hd, buf, 3);
715 len = AV_RB16(buf + 1);
717 printf("skipping RTP packet len=%d\n", len);
722 if (len1 > sizeof(buf))
724 ret = url_readbuf(rt->rtsp_hd, buf, len1);
732 * Read a RTSP message from the server, or prepare to read data
733 * packets if we're reading data interleaved over the TCP/RTSP
734 * connection as well.
736 * @param s RTSP demuxer context
737 * @param reply pointer where the RTSP message header will be stored
738 * @param content_ptr pointer where the RTSP message body, if any, will
739 * be stored (length is in \p reply)
740 * @param return_on_interleaved_data whether the function may return if we
741 * encounter a data marker ('$'), which precedes data
742 * packets over interleaved TCP/RTSP connections. If this
743 * is set, this function will return 1 after encountering
744 * a '$'. If it is not set, the function will skip any
745 * data packets (if they are encountered), until a reply
746 * has been fully parsed. If no more data is available
747 * without parsing a reply, it will return an error.
749 * @returns 1 if a data packets is ready to be received, -1 on error,
753 rtsp_read_reply (AVFormatContext *s, RTSPMessageHeader *reply,
754 unsigned char **content_ptr, int return_on_interleaved_data)
756 RTSPState *rt = s->priv_data;
757 char buf[4096], buf1[1024], *q;
760 int ret, content_length, line_count = 0;
761 unsigned char *content = NULL;
763 memset(reply, 0, sizeof(*reply));
765 /* parse reply (XXX: use buffers) */
766 rt->last_reply[0] = '\0';
770 ret = url_readbuf(rt->rtsp_hd, &ch, 1);
772 printf("ret=%d c=%02x [%c]\n", ret, ch, ch);
779 /* XXX: only parse it if first char on line ? */
780 if (return_on_interleaved_data) {
784 } else if (ch != '\r') {
785 if ((q - buf) < sizeof(buf) - 1)
791 printf("line='%s'\n", buf);
793 /* test if last line */
797 if (line_count == 0) {
799 get_word(buf1, sizeof(buf1), &p);
800 get_word(buf1, sizeof(buf1), &p);
801 reply->status_code = atoi(buf1);
803 rtsp_parse_line(reply, p);
804 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
805 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
810 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
811 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
813 content_length = reply->content_length;
814 if (content_length > 0) {
815 /* leave some room for a trailing '\0' (useful for simple parsing) */
816 content = av_malloc(content_length + 1);
817 (void)url_readbuf(rt->rtsp_hd, content, content_length);
818 content[content_length] = '\0';
821 *content_ptr = content;
828 static void rtsp_send_cmd(AVFormatContext *s,
829 const char *cmd, RTSPMessageHeader *reply,
830 unsigned char **content_ptr)
832 RTSPState *rt = s->priv_data;
833 char buf[4096], buf1[1024];
836 av_strlcpy(buf, cmd, sizeof(buf));
837 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
838 av_strlcat(buf, buf1, sizeof(buf));
839 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
840 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
841 av_strlcat(buf, buf1, sizeof(buf));
843 av_strlcat(buf, "\r\n", sizeof(buf));
845 printf("Sending:\n%s--\n", buf);
847 url_write(rt->rtsp_hd, buf, strlen(buf));
849 rtsp_read_reply(s, reply, content_ptr, 0);
853 /* close and free RTSP streams */
854 static void rtsp_close_streams(RTSPState *rt)
859 for(i=0;i<rt->nb_rtsp_streams;i++) {
860 rtsp_st = rt->rtsp_streams[i];
862 if (rtsp_st->transport_priv) {
863 if (rt->transport == RTSP_TRANSPORT_RDT)
864 ff_rdt_parse_close(rtsp_st->transport_priv);
866 rtp_parse_close(rtsp_st->transport_priv);
868 if (rtsp_st->rtp_handle)
869 url_close(rtsp_st->rtp_handle);
870 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
871 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
874 av_free(rt->rtsp_streams);
876 av_close_input_stream (rt->asf_ctx);
882 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
884 RTSPState *rt = s->priv_data;
887 /* open the RTP context */
888 if (rtsp_st->stream_index >= 0)
889 st = s->streams[rtsp_st->stream_index];
891 s->ctx_flags |= AVFMTCTX_NOHEADER;
893 if (rt->transport == RTSP_TRANSPORT_RDT)
894 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
895 rtsp_st->dynamic_protocol_context,
896 rtsp_st->dynamic_handler);
898 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
899 rtsp_st->sdp_payload_type,
900 &rtsp_st->rtp_payload_data);
902 if (!rtsp_st->transport_priv) {
903 return AVERROR(ENOMEM);
904 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
905 if(rtsp_st->dynamic_handler) {
906 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
907 rtsp_st->dynamic_protocol_context,
908 rtsp_st->dynamic_handler);
916 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
919 make_setup_request (AVFormatContext *s, const char *host, int port,
920 int lower_transport, const char *real_challenge)
922 RTSPState *rt = s->priv_data;
923 int rtx, j, i, err, interleave = 0;
925 RTSPMessageHeader reply1, *reply = &reply1;
927 const char *trans_pref;
929 if (rt->transport == RTSP_TRANSPORT_RDT)
930 trans_pref = "x-pn-tng";
932 trans_pref = "RTP/AVP";
934 /* for each stream, make the setup request */
935 /* XXX: we assume the same server is used for the control of each
938 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
939 char transport[2048];
942 * WMS serves all UDP data over a single connection, the RTX, which
943 * isn't necessarily the first in the SDP but has to be the first
944 * to be set up, else the second/third SETUP will fail with a 461.
946 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
947 rt->server_type == RTSP_SERVER_WMS) {
950 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
951 int len = strlen(rt->rtsp_streams[rtx]->control_url);
953 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4, "/rtx"))
956 if (rtx == rt->nb_rtsp_streams)
957 return -1; /* no RTX found */
958 rtsp_st = rt->rtsp_streams[rtx];
960 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
962 rtsp_st = rt->rtsp_streams[i];
965 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
968 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
969 port = reply->transports[0].client_port_min;
973 /* first try in specified port range */
974 if (RTSP_RTP_PORT_MIN != 0) {
975 while(j <= RTSP_RTP_PORT_MAX) {
976 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
977 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
978 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
984 /* then try on any port
985 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
986 ** err = AVERROR_INVALIDDATA;
992 port = rtp_get_local_port(rtsp_st->rtp_handle);
994 snprintf(transport, sizeof(transport) - 1,
995 "%s/UDP;", trans_pref);
996 if (rt->server_type != RTSP_SERVER_REAL)
997 av_strlcat(transport, "unicast;", sizeof(transport));
998 av_strlcatf(transport, sizeof(transport),
999 "client_port=%d", port);
1000 if (rt->transport == RTSP_TRANSPORT_RTP &&
1001 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1002 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1006 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1007 /** For WMS streams, the application streams are only used for
1008 * UDP. When trying to set it up for TCP streams, the server
1009 * will return an error. Therefore, we skip those streams. */
1010 if (rt->server_type == RTSP_SERVER_WMS &&
1011 s->streams[rtsp_st->stream_index]->codec->codec_type == CODEC_TYPE_DATA)
1013 snprintf(transport, sizeof(transport) - 1,
1014 "%s/TCP;", trans_pref);
1015 if (rt->server_type == RTSP_SERVER_WMS)
1016 av_strlcat(transport, "unicast;", sizeof(transport));
1017 av_strlcatf(transport, sizeof(transport),
1018 "interleaved=%d-%d",
1019 interleave, interleave + 1);
1023 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1024 snprintf(transport, sizeof(transport) - 1,
1025 "%s/UDP;multicast", trans_pref);
1027 if (rt->server_type == RTSP_SERVER_REAL ||
1028 rt->server_type == RTSP_SERVER_WMS)
1029 av_strlcat(transport, ";mode=play", sizeof(transport));
1030 snprintf(cmd, sizeof(cmd),
1031 "SETUP %s RTSP/1.0\r\n"
1032 "Transport: %s\r\n",
1033 rtsp_st->control_url, transport);
1034 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1035 char real_res[41], real_csum[9];
1036 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1038 av_strlcatf(cmd, sizeof(cmd),
1040 "RealChallenge2: %s, sd=%s\r\n",
1041 rt->session_id, real_res, real_csum);
1043 rtsp_send_cmd(s, cmd, reply, NULL);
1044 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1047 } else if (reply->status_code != RTSP_STATUS_OK ||
1048 reply->nb_transports != 1) {
1049 err = AVERROR_INVALIDDATA;
1053 /* XXX: same protocol for all streams is required */
1055 if (reply->transports[0].lower_transport != rt->lower_transport ||
1056 reply->transports[0].transport != rt->transport) {
1057 err = AVERROR_INVALIDDATA;
1061 rt->lower_transport = reply->transports[0].lower_transport;
1062 rt->transport = reply->transports[0].transport;
1065 /* close RTP connection if not choosen */
1066 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1067 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1068 url_close(rtsp_st->rtp_handle);
1069 rtsp_st->rtp_handle = NULL;
1072 switch(reply->transports[0].lower_transport) {
1073 case RTSP_LOWER_TRANSPORT_TCP:
1074 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1075 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1078 case RTSP_LOWER_TRANSPORT_UDP:
1082 /* XXX: also use address if specified */
1083 snprintf(url, sizeof(url), "rtp://%s:%d",
1084 host, reply->transports[0].server_port_min);
1085 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1086 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1087 err = AVERROR_INVALIDDATA;
1092 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1097 in.s_addr = htonl(reply->transports[0].destination);
1098 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1100 reply->transports[0].port_min,
1101 reply->transports[0].ttl);
1102 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1103 err = AVERROR_INVALIDDATA;
1110 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1114 if (rt->server_type == RTSP_SERVER_REAL)
1115 rt->need_subscription = 1;
1120 for (i=0; i<rt->nb_rtsp_streams; i++) {
1121 if (rt->rtsp_streams[i]->rtp_handle) {
1122 url_close(rt->rtsp_streams[i]->rtp_handle);
1123 rt->rtsp_streams[i]->rtp_handle = NULL;
1129 static int rtsp_read_header(AVFormatContext *s,
1130 AVFormatParameters *ap)
1132 RTSPState *rt = s->priv_data;
1133 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1134 URLContext *rtsp_hd;
1136 RTSPMessageHeader reply1, *reply = &reply1;
1137 unsigned char *content = NULL;
1138 int lower_transport_mask = 0;
1139 char real_challenge[64];
1141 /* extract hostname and port */
1142 url_split(NULL, 0, NULL, 0,
1143 host, sizeof(host), &port, path, sizeof(path), s->filename);
1145 port = RTSP_DEFAULT_PORT;
1147 /* search for options */
1148 option_list = strchr(path, '?');
1150 /* remove the options from the path */
1152 while(option_list) {
1153 /* move the option pointer */
1154 option = option_list;
1155 option_list = strchr(option_list, '&');
1157 *(option_list++) = 0;
1158 /* handle the options */
1159 if (strcmp(option, "udp") == 0)
1160 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1161 else if (strcmp(option, "multicast") == 0)
1162 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1163 else if (strcmp(option, "tcp") == 0)
1164 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1168 if (!lower_transport_mask)
1169 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1171 /* open the tcp connexion */
1172 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1173 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1174 return AVERROR(EIO);
1175 rt->rtsp_hd = rtsp_hd;
1178 /* request options supported by the server; this also detects server type */
1179 for (rt->server_type = RTSP_SERVER_RTP;;) {
1180 snprintf(cmd, sizeof(cmd),
1181 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1182 if (rt->server_type == RTSP_SERVER_REAL)
1185 * The following entries are required for proper
1186 * streaming from a Realmedia server. They are
1187 * interdependent in some way although we currently
1188 * don't quite understand how. Values were copied
1189 * from mplayer SVN r23589.
1190 * @param CompanyID is a 16-byte ID in base64
1191 * @param ClientChallenge is a 16-byte ID in hex
1193 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1194 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1195 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1196 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1198 rtsp_send_cmd(s, cmd, reply, NULL);
1199 if (reply->status_code != RTSP_STATUS_OK) {
1200 err = AVERROR_INVALIDDATA;
1204 /* detect server type if not standard-compliant RTP */
1205 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1206 rt->server_type = RTSP_SERVER_REAL;
1208 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1209 rt->server_type = RTSP_SERVER_WMS;
1210 } else if (rt->server_type == RTSP_SERVER_REAL) {
1211 strcpy(real_challenge, reply->real_challenge);
1216 /* describe the stream */
1217 snprintf(cmd, sizeof(cmd),
1218 "DESCRIBE %s RTSP/1.0\r\n"
1219 "Accept: application/sdp\r\n",
1221 if (rt->server_type == RTSP_SERVER_REAL) {
1223 * The Require: attribute is needed for proper streaming from
1224 * Realmedia servers.
1227 "Require: com.real.retain-entity-for-setup\r\n",
1230 rtsp_send_cmd(s, cmd, reply, &content);
1232 err = AVERROR_INVALIDDATA;
1235 if (reply->status_code != RTSP_STATUS_OK) {
1236 err = AVERROR_INVALIDDATA;
1240 /* now we got the SDP description, we parse it */
1241 ret = sdp_parse(s, (const char *)content);
1244 err = AVERROR_INVALIDDATA;
1249 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1251 err = make_setup_request(s, host, port, lower_transport,
1252 rt->server_type == RTSP_SERVER_REAL ?
1253 real_challenge : NULL);
1256 lower_transport_mask &= ~(1 << lower_transport);
1257 if (lower_transport_mask == 0 && err == 1) {
1258 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1263 rt->state = RTSP_STATE_IDLE;
1264 rt->seek_timestamp = 0; /* default is to start stream at position
1266 if (ap->initial_pause) {
1267 /* do not start immediately */
1269 if (rtsp_read_play(s) < 0) {
1270 err = AVERROR_INVALIDDATA;
1276 rtsp_close_streams(rt);
1278 url_close(rt->rtsp_hd);
1282 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1283 uint8_t *buf, int buf_size)
1285 RTSPState *rt = s->priv_data;
1286 int id, len, i, ret;
1287 RTSPStream *rtsp_st;
1289 #ifdef DEBUG_RTP_TCP
1290 printf("tcp_read_packet:\n");
1294 RTSPMessageHeader reply;
1296 ret = rtsp_read_reply(s, &reply, NULL, 1);
1299 if (ret == 1) /* received '$' */
1301 /* XXX: parse message */
1303 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1307 len = AV_RB16(buf + 1);
1308 #ifdef DEBUG_RTP_TCP
1309 printf("id=%d len=%d\n", id, len);
1311 if (len > buf_size || len < 12)
1314 ret = url_readbuf(rt->rtsp_hd, buf, len);
1317 if (rt->transport == RTSP_TRANSPORT_RDT &&
1318 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1321 /* find the matching stream */
1322 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1323 rtsp_st = rt->rtsp_streams[i];
1324 if (id >= rtsp_st->interleaved_min &&
1325 id <= rtsp_st->interleaved_max)
1330 *prtsp_st = rtsp_st;
1334 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1335 uint8_t *buf, int buf_size)
1337 RTSPState *rt = s->priv_data;
1338 RTSPStream *rtsp_st;
1340 int fd, fd_max, n, i, ret, tcp_fd;
1344 if (url_interrupt_cb())
1345 return AVERROR(EINTR);
1347 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1348 FD_SET(tcp_fd, &rfds);
1349 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1350 rtsp_st = rt->rtsp_streams[i];
1351 if (rtsp_st->rtp_handle) {
1352 /* currently, we cannot probe RTCP handle because of
1353 * blocking restrictions */
1354 fd = url_get_file_handle(rtsp_st->rtp_handle);
1361 tv.tv_usec = 100 * 1000;
1362 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1364 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1365 rtsp_st = rt->rtsp_streams[i];
1366 if (rtsp_st->rtp_handle) {
1367 fd = url_get_file_handle(rtsp_st->rtp_handle);
1368 if (FD_ISSET(fd, &rfds)) {
1369 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1371 *prtsp_st = rtsp_st;
1377 if (FD_ISSET(tcp_fd, &rfds)) {
1378 RTSPMessageHeader reply;
1380 rtsp_read_reply(s, &reply, NULL, 0);
1381 /* XXX: parse message */
1387 static int rtsp_read_packet(AVFormatContext *s,
1390 RTSPState *rt = s->priv_data;
1391 RTSPStream *rtsp_st;
1393 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1395 if (rt->server_type == RTSP_SERVER_REAL) {
1397 RTSPMessageHeader reply1, *reply = &reply1;
1398 enum AVDiscard cache[MAX_STREAMS];
1401 for (i = 0; i < s->nb_streams; i++)
1402 cache[i] = s->streams[i]->discard;
1404 if (!rt->need_subscription) {
1405 if (memcmp (cache, rt->real_setup_cache,
1406 sizeof(enum AVDiscard) * s->nb_streams)) {
1407 av_strlcatf(cmd, sizeof(cmd),
1408 "SET_PARAMETER %s RTSP/1.0\r\n"
1409 "Unsubscribe: %s\r\n",
1410 s->filename, rt->last_subscription);
1411 rtsp_send_cmd(s, cmd, reply, NULL);
1412 if (reply->status_code != RTSP_STATUS_OK)
1413 return AVERROR_INVALIDDATA;
1414 rt->need_subscription = 1;
1418 if (rt->need_subscription) {
1419 int r, rule_nr, first = 1;
1421 memcpy(rt->real_setup_cache, cache,
1422 sizeof(enum AVDiscard) * s->nb_streams);
1423 rt->last_subscription[0] = 0;
1425 snprintf(cmd, sizeof(cmd),
1426 "SET_PARAMETER %s RTSP/1.0\r\n"
1429 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1431 for (r = 0; r < s->nb_streams; r++) {
1432 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1433 if (s->streams[r]->discard != AVDISCARD_ALL) {
1435 av_strlcat(rt->last_subscription, ",",
1436 sizeof(rt->last_subscription));
1437 ff_rdt_subscribe_rule(
1438 rt->last_subscription,
1439 sizeof(rt->last_subscription), i, rule_nr);
1446 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1447 rtsp_send_cmd(s, cmd, reply, NULL);
1448 if (reply->status_code != RTSP_STATUS_OK)
1449 return AVERROR_INVALIDDATA;
1450 rt->need_subscription = 0;
1452 if (rt->state == RTSP_STATE_PLAYING)
1457 /* get next frames from the same RTP packet */
1458 if (rt->cur_transport_priv) {
1459 if (rt->transport == RTSP_TRANSPORT_RDT)
1460 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1462 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1464 rt->cur_transport_priv = NULL;
1466 } else if (ret == 1) {
1469 rt->cur_transport_priv = NULL;
1473 /* read next RTP packet */
1475 switch(rt->lower_transport) {
1477 case RTSP_LOWER_TRANSPORT_TCP:
1478 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1480 case RTSP_LOWER_TRANSPORT_UDP:
1481 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1482 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1483 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1484 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1489 if (rt->transport == RTSP_TRANSPORT_RDT)
1490 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1492 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1496 /* more packets may follow, so we save the RTP context */
1497 rt->cur_transport_priv = rtsp_st->transport_priv;
1502 static int rtsp_read_play(AVFormatContext *s)
1504 RTSPState *rt = s->priv_data;
1505 RTSPMessageHeader reply1, *reply = &reply1;
1508 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1510 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1511 if (rt->state == RTSP_STATE_PAUSED) {
1512 snprintf(cmd, sizeof(cmd),
1513 "PLAY %s RTSP/1.0\r\n",
1516 snprintf(cmd, sizeof(cmd),
1517 "PLAY %s RTSP/1.0\r\n"
1518 "Range: npt=%0.3f-\r\n",
1520 (double)rt->seek_timestamp / AV_TIME_BASE);
1522 rtsp_send_cmd(s, cmd, reply, NULL);
1523 if (reply->status_code != RTSP_STATUS_OK) {
1527 rt->state = RTSP_STATE_PLAYING;
1531 /* pause the stream */
1532 static int rtsp_read_pause(AVFormatContext *s)
1534 RTSPState *rt = s->priv_data;
1535 RTSPMessageHeader reply1, *reply = &reply1;
1540 if (rt->state != RTSP_STATE_PLAYING)
1542 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1543 snprintf(cmd, sizeof(cmd),
1544 "PAUSE %s RTSP/1.0\r\n",
1546 rtsp_send_cmd(s, cmd, reply, NULL);
1547 if (reply->status_code != RTSP_STATUS_OK) {
1551 rt->state = RTSP_STATE_PAUSED;
1555 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1556 int64_t timestamp, int flags)
1558 RTSPState *rt = s->priv_data;
1560 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1563 case RTSP_STATE_IDLE:
1565 case RTSP_STATE_PLAYING:
1566 if (rtsp_read_play(s) != 0)
1569 case RTSP_STATE_PAUSED:
1570 rt->state = RTSP_STATE_IDLE;
1576 static int rtsp_read_close(AVFormatContext *s)
1578 RTSPState *rt = s->priv_data;
1579 RTSPMessageHeader reply1, *reply = &reply1;
1583 /* NOTE: it is valid to flush the buffer here */
1584 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1585 url_fclose(&rt->rtsp_gb);
1588 snprintf(cmd, sizeof(cmd),
1589 "TEARDOWN %s RTSP/1.0\r\n",
1591 rtsp_send_cmd(s, cmd, reply, NULL);
1593 rtsp_close_streams(rt);
1594 url_close(rt->rtsp_hd);
1598 #if CONFIG_RTSP_DEMUXER
1599 AVInputFormat rtsp_demuxer = {
1601 NULL_IF_CONFIG_SMALL("RTSP input format"),
1608 .flags = AVFMT_NOFILE,
1609 .read_play = rtsp_read_play,
1610 .read_pause = rtsp_read_pause,
1614 static int sdp_probe(AVProbeData *p1)
1616 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1618 /* we look for a line beginning "c=IN IP4" */
1619 while (p < p_end && *p != '\0') {
1620 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1621 return AVPROBE_SCORE_MAX / 2;
1623 while(p < p_end - 1 && *p != '\n') p++;
1632 #define SDP_MAX_SIZE 8192
1634 static int sdp_read_header(AVFormatContext *s,
1635 AVFormatParameters *ap)
1637 RTSPState *rt = s->priv_data;
1638 RTSPStream *rtsp_st;
1643 /* read the whole sdp file */
1644 /* XXX: better loading */
1645 content = av_malloc(SDP_MAX_SIZE);
1646 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1649 return AVERROR_INVALIDDATA;
1651 content[size] ='\0';
1653 sdp_parse(s, content);
1656 /* open each RTP stream */
1657 for(i=0;i<rt->nb_rtsp_streams;i++) {
1658 rtsp_st = rt->rtsp_streams[i];
1660 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1661 inet_ntoa(rtsp_st->sdp_ip),
1665 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1666 err = AVERROR_INVALIDDATA;
1669 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1674 rtsp_close_streams(rt);
1678 static int sdp_read_packet(AVFormatContext *s,
1681 return rtsp_read_packet(s, pkt);
1684 static int sdp_read_close(AVFormatContext *s)
1686 RTSPState *rt = s->priv_data;
1687 rtsp_close_streams(rt);
1691 #if CONFIG_SDP_DEMUXER
1692 AVInputFormat sdp_demuxer = {
1694 NULL_IF_CONFIG_SMALL("SDP"),
1703 #if CONFIG_REDIR_DEMUXER
1704 /* dummy redirector format (used directly in av_open_input_file now) */
1705 static int redir_probe(AVProbeData *pd)
1710 if (av_strstart(p, "http://", NULL) ||
1711 av_strstart(p, "rtsp://", NULL))
1712 return AVPROBE_SCORE_MAX;
1716 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1720 AVFormatContext *ic = NULL;
1721 ByteIOContext *f = s->pb;
1723 /* parse each URL and try to open it */
1725 while (c != URL_EOF) {
1728 if (!redir_isspace(c))
1737 if (c == URL_EOF || redir_isspace(c))
1739 if ((q - buf) < sizeof(buf) - 1)
1744 //printf("URL='%s'\n", buf);
1745 /* try to open the media file */
1746 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1750 return AVERROR(EIO);
1758 AVInputFormat redir_demuxer = {
1760 NULL_IF_CONFIG_SMALL("Redirector format"),