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 /* XXX: currently, the only way to change the protocols consists in
47 changing this variable */
49 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
50 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
53 static int rtsp_probe(AVProbeData *p)
55 if (av_strstart(p->filename, "rtsp:", NULL))
56 return AVPROBE_SCORE_MAX;
60 static int redir_isspace(int c)
62 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
65 static void skip_spaces(const char **pp)
69 while (redir_isspace(*p))
74 static void get_word_sep(char *buf, int buf_size, const char *sep,
85 while (!strchr(sep, *p) && *p != '\0') {
86 if ((q - buf) < buf_size - 1)
95 static void get_word(char *buf, int buf_size, const char **pp)
103 while (!redir_isspace(*p) && *p != '\0') {
104 if ((q - buf) < buf_size - 1)
113 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
115 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
122 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
123 see if we can handle this kind of payload */
124 get_word_sep(buf, sizeof(buf), "/", &p);
125 if (payload_type >= RTP_PT_PRIVATE) {
126 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
128 if (!strcasecmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
129 codec->codec_id = handler->codec_id;
130 rtsp_st->dynamic_handler= handler;
132 rtsp_st->dynamic_protocol_context= handler->open();
136 handler= handler->next;
139 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
140 /* search into AVRtpPayloadTypes[] */
141 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
144 c = avcodec_find_decoder(codec->codec_id);
148 c_name = (char *)NULL;
151 get_word_sep(buf, sizeof(buf), "/", &p);
153 switch (codec->codec_type) {
154 case CODEC_TYPE_AUDIO:
155 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
156 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
157 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
159 codec->sample_rate = i;
160 get_word_sep(buf, sizeof(buf), "/", &p);
164 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
165 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
167 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
168 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
170 case CODEC_TYPE_VIDEO:
171 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
182 /* return the length and optionnaly the data */
183 static int hex_to_data(uint8_t *data, const char *p)
193 c = toupper((unsigned char)*p++);
194 if (c >= '0' && c <= '9')
196 else if (c >= 'A' && c <= 'F')
211 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
213 switch (codec->codec_id) {
216 if (!strcmp(attr, "config")) {
217 /* decode the hexa encoded parameter */
218 int len = hex_to_data(NULL, value);
219 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
220 if (!codec->extradata)
222 codec->extradata_size = len;
223 hex_to_data(codec->extradata, value);
238 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
239 #define ATTR_NAME_TYPE_INT 0
240 #define ATTR_NAME_TYPE_STR 1
241 static const AttrNameMap attr_names[]=
243 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
244 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
245 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
246 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
247 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
248 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
252 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
253 * because it is used in rtp_h264.c, which is forthcoming.
255 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
260 get_word_sep(attr, attr_size, "=", p);
263 get_word_sep(value, value_size, ";", p);
271 /* parse a SDP line and save stream attributes */
272 static void sdp_parse_fmtp(AVStream *st, const char *p)
278 RTSPStream *rtsp_st = st->priv_data;
279 AVCodecContext *codec = st->codec;
280 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
282 /* loop on each attribute */
283 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
285 /* grab the codec extra_data from the config parameter of the fmtp line */
286 sdp_parse_fmtp_config(codec, attr, value);
287 /* Looking for a known attribute */
288 for (i = 0; attr_names[i].str; ++i) {
289 if (!strcasecmp(attr, attr_names[i].str)) {
290 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
291 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
292 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
293 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
299 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
301 * Used for seeking in the rtp stream.
303 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
308 if (!av_stristart(p, "npt=", &p))
311 *start = AV_NOPTS_VALUE;
312 *end = AV_NOPTS_VALUE;
314 get_word_sep(buf, sizeof(buf), "-", &p);
315 *start = parse_date(buf, 1);
318 get_word_sep(buf, sizeof(buf), "-", &p);
319 *end = parse_date(buf, 1);
321 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
322 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
325 typedef struct SDPParseState {
327 struct in_addr default_ip;
329 int skip_media; ///< set if an unknown m= line occurs
332 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
333 int letter, const char *buf)
335 RTSPState *rt = s->priv_data;
336 char buf1[64], st_type[64];
338 enum CodecType codec_type;
342 struct in_addr sdp_ip;
346 printf("sdp: %c='%s'\n", letter, buf);
350 if (s1->skip_media && letter != 'm')
354 get_word(buf1, sizeof(buf1), &p);
355 if (strcmp(buf1, "IN") != 0)
357 get_word(buf1, sizeof(buf1), &p);
358 if (strcmp(buf1, "IP4") != 0)
360 get_word_sep(buf1, sizeof(buf1), "/", &p);
361 if (inet_aton(buf1, &sdp_ip) == 0)
366 get_word_sep(buf1, sizeof(buf1), "/", &p);
369 if (s->nb_streams == 0) {
370 s1->default_ip = sdp_ip;
371 s1->default_ttl = ttl;
373 st = s->streams[s->nb_streams - 1];
374 rtsp_st = st->priv_data;
375 rtsp_st->sdp_ip = sdp_ip;
376 rtsp_st->sdp_ttl = ttl;
380 av_metadata_set(&s->metadata, "title", p);
383 if (s->nb_streams == 0) {
384 av_metadata_set(&s->metadata, "comment", p);
391 get_word(st_type, sizeof(st_type), &p);
392 if (!strcmp(st_type, "audio")) {
393 codec_type = CODEC_TYPE_AUDIO;
394 } else if (!strcmp(st_type, "video")) {
395 codec_type = CODEC_TYPE_VIDEO;
396 } else if (!strcmp(st_type, "application")) {
397 codec_type = CODEC_TYPE_DATA;
402 rtsp_st = av_mallocz(sizeof(RTSPStream));
405 rtsp_st->stream_index = -1;
406 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
408 rtsp_st->sdp_ip = s1->default_ip;
409 rtsp_st->sdp_ttl = s1->default_ttl;
411 get_word(buf1, sizeof(buf1), &p); /* port */
412 rtsp_st->sdp_port = atoi(buf1);
414 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
416 /* XXX: handle list of formats */
417 get_word(buf1, sizeof(buf1), &p); /* format list */
418 rtsp_st->sdp_payload_type = atoi(buf1);
420 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
421 /* no corresponding stream */
423 st = av_new_stream(s, 0);
426 st->priv_data = rtsp_st;
427 rtsp_st->stream_index = st->index;
428 st->codec->codec_type = codec_type;
429 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
430 /* if standard payload type, we can find the codec right now */
431 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
434 /* put a default control url */
435 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
438 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
440 /* get the control url */
441 st = s->streams[s->nb_streams - 1];
442 rtsp_st = st->priv_data;
444 /* XXX: may need to add full url resolution */
445 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
446 if (proto[0] == '\0') {
447 /* relative control URL */
448 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
449 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
451 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
453 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
454 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
455 get_word(buf1, sizeof(buf1), &p);
456 payload_type = atoi(buf1);
457 st = s->streams[s->nb_streams - 1];
458 rtsp_st = st->priv_data;
459 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
460 } else if (av_strstart(p, "fmtp:", &p)) {
461 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
462 get_word(buf1, sizeof(buf1), &p);
463 payload_type = atoi(buf1);
464 for(i = 0; i < s->nb_streams;i++) {
466 rtsp_st = st->priv_data;
467 if (rtsp_st->sdp_payload_type == payload_type) {
468 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
469 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
470 sdp_parse_fmtp(st, p);
473 sdp_parse_fmtp(st, p);
477 } else if(av_strstart(p, "framesize:", &p)) {
478 // let dynamic protocol handlers have a stab at the line.
479 get_word(buf1, sizeof(buf1), &p);
480 payload_type = atoi(buf1);
481 for(i = 0; i < s->nb_streams;i++) {
483 rtsp_st = st->priv_data;
484 if (rtsp_st->sdp_payload_type == payload_type) {
485 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
486 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
490 } else if(av_strstart(p, "range:", &p)) {
493 // this is so that seeking on a streamed file can work.
494 rtsp_parse_range_npt(p, &start, &end);
495 s->start_time= start;
496 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
497 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
499 rt->transport = RTSP_TRANSPORT_RDT;
501 if (rt->server_type == RTSP_SERVER_WMS)
502 ff_wms_parse_sdp_a_line(s, p);
503 if (s->nb_streams > 0) {
504 if (rt->server_type == RTSP_SERVER_REAL)
505 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
507 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
508 if (rtsp_st->dynamic_handler &&
509 rtsp_st->dynamic_handler->parse_sdp_a_line)
510 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
511 rtsp_st->dynamic_protocol_context, buf);
518 static int sdp_parse(AVFormatContext *s, const char *content)
522 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
523 * contain long SDP lines containing complete ASF Headers (several
524 * kB) or arrays of MDPR (RM stream descriptor) headers plus
525 * "rulebooks" describing their properties. Therefore, the SDP line
526 * buffer is large. */
528 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
530 memset(s1, 0, sizeof(SDPParseState));
541 /* get the content */
543 while (*p != '\n' && *p != '\r' && *p != '\0') {
544 if ((q - buf) < sizeof(buf) - 1)
549 sdp_parse_line(s, s1, letter, buf);
551 while (*p != '\n' && *p != '\0')
559 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
566 v = strtol(p, (char **)&p, 10);
570 v = strtol(p, (char **)&p, 10);
579 /* XXX: only one transport specification is parsed */
580 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
582 char transport_protocol[16];
584 char lower_transport[16];
586 RTSPTransportField *th;
589 reply->nb_transports = 0;
596 th = &reply->transports[reply->nb_transports];
598 get_word_sep(transport_protocol, sizeof(transport_protocol),
602 if (!strcasecmp (transport_protocol, "rtp")) {
603 get_word_sep(profile, sizeof(profile), "/;,", &p);
604 lower_transport[0] = '\0';
605 /* rtp/avp/<protocol> */
608 get_word_sep(lower_transport, sizeof(lower_transport),
611 th->transport = RTSP_TRANSPORT_RTP;
612 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
613 !strcasecmp (transport_protocol, "x-real-rdt")) {
614 /* x-pn-tng/<protocol> */
615 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
617 th->transport = RTSP_TRANSPORT_RDT;
619 if (!strcasecmp(lower_transport, "TCP"))
620 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
622 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
626 /* get each parameter */
627 while (*p != '\0' && *p != ',') {
628 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
629 if (!strcmp(parameter, "port")) {
632 rtsp_parse_range(&th->port_min, &th->port_max, &p);
634 } else if (!strcmp(parameter, "client_port")) {
637 rtsp_parse_range(&th->client_port_min,
638 &th->client_port_max, &p);
640 } else if (!strcmp(parameter, "server_port")) {
643 rtsp_parse_range(&th->server_port_min,
644 &th->server_port_max, &p);
646 } else if (!strcmp(parameter, "interleaved")) {
649 rtsp_parse_range(&th->interleaved_min,
650 &th->interleaved_max, &p);
652 } else if (!strcmp(parameter, "multicast")) {
653 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
654 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
655 } else if (!strcmp(parameter, "ttl")) {
658 th->ttl = strtol(p, (char **)&p, 10);
660 } else if (!strcmp(parameter, "destination")) {
661 struct in_addr ipaddr;
665 get_word_sep(buf, sizeof(buf), ";,", &p);
666 if (inet_aton(buf, &ipaddr))
667 th->destination = ntohl(ipaddr.s_addr);
670 while (*p != ';' && *p != '\0' && *p != ',')
678 reply->nb_transports++;
682 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
686 /* NOTE: we do case independent match for broken servers */
688 if (av_stristart(p, "Session:", &p)) {
689 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
690 } else if (av_stristart(p, "Content-Length:", &p)) {
691 reply->content_length = strtol(p, NULL, 10);
692 } else if (av_stristart(p, "Transport:", &p)) {
693 rtsp_parse_transport(reply, p);
694 } else if (av_stristart(p, "CSeq:", &p)) {
695 reply->seq = strtol(p, NULL, 10);
696 } else if (av_stristart(p, "Range:", &p)) {
697 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
698 } else if (av_stristart(p, "RealChallenge1:", &p)) {
700 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
701 } else if (av_stristart(p, "Server:", &p)) {
703 av_strlcpy(reply->server, p, sizeof(reply->server));
707 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
713 ret = url_read(h, buf+len, size-len);
721 /* skip a RTP/TCP interleaved packet */
722 static void rtsp_skip_packet(AVFormatContext *s)
724 RTSPState *rt = s->priv_data;
728 ret = url_readbuf(rt->rtsp_hd, buf, 3);
731 len = AV_RB16(buf + 1);
733 printf("skipping RTP packet len=%d\n", len);
738 if (len1 > sizeof(buf))
740 ret = url_readbuf(rt->rtsp_hd, buf, len1);
748 rtsp_read_reply (AVFormatContext *s, RTSPMessageHeader *reply,
749 unsigned char **content_ptr)
751 RTSPState *rt = s->priv_data;
752 char buf[4096], buf1[1024], *q;
755 int content_length, line_count = 0;
756 unsigned char *content = NULL;
758 memset(reply, 0, sizeof(*reply));
760 /* parse reply (XXX: use buffers) */
761 rt->last_reply[0] = '\0';
765 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
770 /* XXX: only parse it if first char on line ? */
772 } else if (ch != '\r') {
773 if ((q - buf) < sizeof(buf) - 1)
779 printf("line='%s'\n", buf);
781 /* test if last line */
785 if (line_count == 0) {
787 get_word(buf1, sizeof(buf1), &p);
788 get_word(buf1, sizeof(buf1), &p);
789 reply->status_code = atoi(buf1);
791 rtsp_parse_line(reply, p);
792 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
793 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
798 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
799 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
801 content_length = reply->content_length;
802 if (content_length > 0) {
803 /* leave some room for a trailing '\0' (useful for simple parsing) */
804 content = av_malloc(content_length + 1);
805 (void)url_readbuf(rt->rtsp_hd, content, content_length);
806 content[content_length] = '\0';
809 *content_ptr = content;
814 static void rtsp_send_cmd(AVFormatContext *s,
815 const char *cmd, RTSPMessageHeader *reply,
816 unsigned char **content_ptr)
818 RTSPState *rt = s->priv_data;
819 char buf[4096], buf1[1024];
822 av_strlcpy(buf, cmd, sizeof(buf));
823 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
824 av_strlcat(buf, buf1, sizeof(buf));
825 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
826 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
827 av_strlcat(buf, buf1, sizeof(buf));
829 av_strlcat(buf, "\r\n", sizeof(buf));
831 printf("Sending:\n%s--\n", buf);
833 url_write(rt->rtsp_hd, buf, strlen(buf));
835 rtsp_read_reply(s, reply, content_ptr);
839 /* close and free RTSP streams */
840 static void rtsp_close_streams(RTSPState *rt)
845 for(i=0;i<rt->nb_rtsp_streams;i++) {
846 rtsp_st = rt->rtsp_streams[i];
848 if (rtsp_st->transport_priv) {
849 if (rt->transport == RTSP_TRANSPORT_RDT)
850 ff_rdt_parse_close(rtsp_st->transport_priv);
852 rtp_parse_close(rtsp_st->transport_priv);
854 if (rtsp_st->rtp_handle)
855 url_close(rtsp_st->rtp_handle);
856 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
857 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
860 av_free(rt->rtsp_streams);
862 av_close_input_stream (rt->asf_ctx);
868 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
870 RTSPState *rt = s->priv_data;
873 /* open the RTP context */
874 if (rtsp_st->stream_index >= 0)
875 st = s->streams[rtsp_st->stream_index];
877 s->ctx_flags |= AVFMTCTX_NOHEADER;
879 if (rt->transport == RTSP_TRANSPORT_RDT)
880 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
881 rtsp_st->dynamic_protocol_context,
882 rtsp_st->dynamic_handler);
884 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
885 rtsp_st->sdp_payload_type,
886 &rtsp_st->rtp_payload_data);
888 if (!rtsp_st->transport_priv) {
889 return AVERROR(ENOMEM);
890 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
891 if(rtsp_st->dynamic_handler) {
892 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
893 rtsp_st->dynamic_protocol_context,
894 rtsp_st->dynamic_handler);
902 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
905 make_setup_request (AVFormatContext *s, const char *host, int port,
906 int lower_transport, const char *real_challenge)
908 RTSPState *rt = s->priv_data;
909 int rtx, j, i, err, interleave = 0;
911 RTSPMessageHeader reply1, *reply = &reply1;
913 const char *trans_pref;
915 if (rt->transport == RTSP_TRANSPORT_RDT)
916 trans_pref = "x-pn-tng";
918 trans_pref = "RTP/AVP";
920 /* for each stream, make the setup request */
921 /* XXX: we assume the same server is used for the control of each
924 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
925 char transport[2048];
928 * WMS serves all UDP data over a single connection, the RTX, which
929 * isn't necessarily the first in the SDP but has to be the first
930 * to be set up, else the second/third SETUP will fail with a 461.
932 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
933 rt->server_type == RTSP_SERVER_WMS) {
936 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
937 int len = strlen(rt->rtsp_streams[rtx]->control_url);
939 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4, "/rtx"))
942 if (rtx == rt->nb_rtsp_streams)
943 return -1; /* no RTX found */
944 rtsp_st = rt->rtsp_streams[rtx];
946 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
948 rtsp_st = rt->rtsp_streams[i];
951 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
954 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
955 port = reply->transports[0].client_port_min;
959 /* first try in specified port range */
960 if (RTSP_RTP_PORT_MIN != 0) {
961 while(j <= RTSP_RTP_PORT_MAX) {
962 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
963 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
964 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
970 /* then try on any port
971 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
972 ** err = AVERROR_INVALIDDATA;
978 port = rtp_get_local_port(rtsp_st->rtp_handle);
980 snprintf(transport, sizeof(transport) - 1,
981 "%s/UDP;", trans_pref);
982 if (rt->server_type != RTSP_SERVER_REAL)
983 av_strlcat(transport, "unicast;", sizeof(transport));
984 av_strlcatf(transport, sizeof(transport),
985 "client_port=%d", port);
986 if (rt->transport == RTSP_TRANSPORT_RTP &&
987 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
988 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
992 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
993 /** For WMS streams, the application streams are only used for
994 * UDP. When trying to set it up for TCP streams, the server
995 * will return an error. Therefore, we skip those streams. */
996 if (rt->server_type == RTSP_SERVER_WMS &&
997 s->streams[rtsp_st->stream_index]->codec->codec_type == CODEC_TYPE_DATA)
999 snprintf(transport, sizeof(transport) - 1,
1000 "%s/TCP;", trans_pref);
1001 if (rt->server_type == RTSP_SERVER_WMS)
1002 av_strlcat(transport, "unicast;", sizeof(transport));
1003 av_strlcatf(transport, sizeof(transport),
1004 "interleaved=%d-%d",
1005 interleave, interleave + 1);
1009 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1010 snprintf(transport, sizeof(transport) - 1,
1011 "%s/UDP;multicast", trans_pref);
1013 if (rt->server_type == RTSP_SERVER_REAL ||
1014 rt->server_type == RTSP_SERVER_WMS)
1015 av_strlcat(transport, ";mode=play", sizeof(transport));
1016 snprintf(cmd, sizeof(cmd),
1017 "SETUP %s RTSP/1.0\r\n"
1018 "Transport: %s\r\n",
1019 rtsp_st->control_url, transport);
1020 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1021 char real_res[41], real_csum[9];
1022 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1024 av_strlcatf(cmd, sizeof(cmd),
1026 "RealChallenge2: %s, sd=%s\r\n",
1027 rt->session_id, real_res, real_csum);
1029 rtsp_send_cmd(s, cmd, reply, NULL);
1030 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1033 } else if (reply->status_code != RTSP_STATUS_OK ||
1034 reply->nb_transports != 1) {
1035 err = AVERROR_INVALIDDATA;
1039 /* XXX: same protocol for all streams is required */
1041 if (reply->transports[0].lower_transport != rt->lower_transport ||
1042 reply->transports[0].transport != rt->transport) {
1043 err = AVERROR_INVALIDDATA;
1047 rt->lower_transport = reply->transports[0].lower_transport;
1048 rt->transport = reply->transports[0].transport;
1051 /* close RTP connection if not choosen */
1052 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1053 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1054 url_close(rtsp_st->rtp_handle);
1055 rtsp_st->rtp_handle = NULL;
1058 switch(reply->transports[0].lower_transport) {
1059 case RTSP_LOWER_TRANSPORT_TCP:
1060 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1061 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1064 case RTSP_LOWER_TRANSPORT_UDP:
1068 /* XXX: also use address if specified */
1069 snprintf(url, sizeof(url), "rtp://%s:%d",
1070 host, reply->transports[0].server_port_min);
1071 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1072 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1073 err = AVERROR_INVALIDDATA;
1078 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1083 in.s_addr = htonl(reply->transports[0].destination);
1084 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1086 reply->transports[0].port_min,
1087 reply->transports[0].ttl);
1088 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1089 err = AVERROR_INVALIDDATA;
1096 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1100 if (rt->server_type == RTSP_SERVER_REAL)
1101 rt->need_subscription = 1;
1106 for (i=0; i<rt->nb_rtsp_streams; i++) {
1107 if (rt->rtsp_streams[i]->rtp_handle) {
1108 url_close(rt->rtsp_streams[i]->rtp_handle);
1109 rt->rtsp_streams[i]->rtp_handle = NULL;
1115 static int rtsp_read_header(AVFormatContext *s,
1116 AVFormatParameters *ap)
1118 RTSPState *rt = s->priv_data;
1119 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1120 URLContext *rtsp_hd;
1122 RTSPMessageHeader reply1, *reply = &reply1;
1123 unsigned char *content = NULL;
1124 int lower_transport_mask = 0;
1125 char real_challenge[64];
1127 /* extract hostname and port */
1128 url_split(NULL, 0, NULL, 0,
1129 host, sizeof(host), &port, path, sizeof(path), s->filename);
1131 port = RTSP_DEFAULT_PORT;
1133 /* search for options */
1134 option_list = strchr(path, '?');
1136 /* remove the options from the path */
1138 while(option_list) {
1139 /* move the option pointer */
1140 option = option_list;
1141 option_list = strchr(option_list, '&');
1143 *(option_list++) = 0;
1144 /* handle the options */
1145 if (strcmp(option, "udp") == 0)
1146 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1147 else if (strcmp(option, "multicast") == 0)
1148 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1149 else if (strcmp(option, "tcp") == 0)
1150 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1154 if (!lower_transport_mask)
1155 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1157 /* open the tcp connexion */
1158 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1159 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1160 return AVERROR(EIO);
1161 rt->rtsp_hd = rtsp_hd;
1164 /* request options supported by the server; this also detects server type */
1165 for (rt->server_type = RTSP_SERVER_RTP;;) {
1166 snprintf(cmd, sizeof(cmd),
1167 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1168 if (rt->server_type == RTSP_SERVER_REAL)
1171 * The following entries are required for proper
1172 * streaming from a Realmedia server. They are
1173 * interdependent in some way although we currently
1174 * don't quite understand how. Values were copied
1175 * from mplayer SVN r23589.
1176 * @param CompanyID is a 16-byte ID in base64
1177 * @param ClientChallenge is a 16-byte ID in hex
1179 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1180 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1181 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1182 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1184 rtsp_send_cmd(s, cmd, reply, NULL);
1185 if (reply->status_code != RTSP_STATUS_OK) {
1186 err = AVERROR_INVALIDDATA;
1190 /* detect server type if not standard-compliant RTP */
1191 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1192 rt->server_type = RTSP_SERVER_REAL;
1194 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1195 rt->server_type = RTSP_SERVER_WMS;
1196 } else if (rt->server_type == RTSP_SERVER_REAL) {
1197 strcpy(real_challenge, reply->real_challenge);
1202 /* describe the stream */
1203 snprintf(cmd, sizeof(cmd),
1204 "DESCRIBE %s RTSP/1.0\r\n"
1205 "Accept: application/sdp\r\n",
1207 if (rt->server_type == RTSP_SERVER_REAL) {
1209 * The Require: attribute is needed for proper streaming from
1210 * Realmedia servers.
1213 "Require: com.real.retain-entity-for-setup\r\n",
1216 rtsp_send_cmd(s, cmd, reply, &content);
1218 err = AVERROR_INVALIDDATA;
1221 if (reply->status_code != RTSP_STATUS_OK) {
1222 err = AVERROR_INVALIDDATA;
1226 /* now we got the SDP description, we parse it */
1227 ret = sdp_parse(s, (const char *)content);
1230 err = AVERROR_INVALIDDATA;
1235 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1237 err = make_setup_request(s, host, port, lower_transport,
1238 rt->server_type == RTSP_SERVER_REAL ?
1239 real_challenge : NULL);
1242 lower_transport_mask &= ~(1 << lower_transport);
1243 if (lower_transport_mask == 0 && err == 1) {
1244 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1249 rt->state = RTSP_STATE_IDLE;
1250 rt->seek_timestamp = 0; /* default is to start stream at position
1252 if (ap->initial_pause) {
1253 /* do not start immediately */
1255 if (rtsp_read_play(s) < 0) {
1256 err = AVERROR_INVALIDDATA;
1262 rtsp_close_streams(rt);
1264 url_close(rt->rtsp_hd);
1268 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1269 uint8_t *buf, int buf_size)
1271 RTSPState *rt = s->priv_data;
1272 int id, len, i, ret;
1273 RTSPStream *rtsp_st;
1275 #ifdef DEBUG_RTP_TCP
1276 printf("tcp_read_packet:\n");
1280 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1281 #ifdef DEBUG_RTP_TCP
1282 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1289 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1293 len = AV_RB16(buf + 1);
1294 #ifdef DEBUG_RTP_TCP
1295 printf("id=%d len=%d\n", id, len);
1297 if (len > buf_size || len < 12)
1300 ret = url_readbuf(rt->rtsp_hd, buf, len);
1303 if (rt->transport == RTSP_TRANSPORT_RDT &&
1304 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1307 /* find the matching stream */
1308 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1309 rtsp_st = rt->rtsp_streams[i];
1310 if (id >= rtsp_st->interleaved_min &&
1311 id <= rtsp_st->interleaved_max)
1316 *prtsp_st = rtsp_st;
1320 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1321 uint8_t *buf, int buf_size)
1323 RTSPState *rt = s->priv_data;
1324 RTSPStream *rtsp_st;
1326 int fd, fd_max, n, i, ret;
1330 if (url_interrupt_cb())
1331 return AVERROR(EINTR);
1334 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1335 rtsp_st = rt->rtsp_streams[i];
1336 if (rtsp_st->rtp_handle) {
1337 /* currently, we cannot probe RTCP handle because of
1338 * blocking restrictions */
1339 fd = url_get_file_handle(rtsp_st->rtp_handle);
1346 tv.tv_usec = 100 * 1000;
1347 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1349 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1350 rtsp_st = rt->rtsp_streams[i];
1351 if (rtsp_st->rtp_handle) {
1352 fd = url_get_file_handle(rtsp_st->rtp_handle);
1353 if (FD_ISSET(fd, &rfds)) {
1354 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1356 *prtsp_st = rtsp_st;
1366 static int rtsp_read_packet(AVFormatContext *s,
1369 RTSPState *rt = s->priv_data;
1370 RTSPStream *rtsp_st;
1372 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1374 if (rt->server_type == RTSP_SERVER_REAL) {
1376 RTSPMessageHeader reply1, *reply = &reply1;
1377 enum AVDiscard cache[MAX_STREAMS];
1380 for (i = 0; i < s->nb_streams; i++)
1381 cache[i] = s->streams[i]->discard;
1383 if (!rt->need_subscription) {
1384 if (memcmp (cache, rt->real_setup_cache,
1385 sizeof(enum AVDiscard) * s->nb_streams)) {
1386 av_strlcatf(cmd, sizeof(cmd),
1387 "SET_PARAMETER %s RTSP/1.0\r\n"
1388 "Unsubscribe: %s\r\n",
1389 s->filename, rt->last_subscription);
1390 rtsp_send_cmd(s, cmd, reply, NULL);
1391 if (reply->status_code != RTSP_STATUS_OK)
1392 return AVERROR_INVALIDDATA;
1393 rt->need_subscription = 1;
1397 if (rt->need_subscription) {
1398 int r, rule_nr, first = 1;
1400 memcpy(rt->real_setup_cache, cache,
1401 sizeof(enum AVDiscard) * s->nb_streams);
1402 rt->last_subscription[0] = 0;
1404 snprintf(cmd, sizeof(cmd),
1405 "SET_PARAMETER %s RTSP/1.0\r\n"
1408 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1410 for (r = 0; r < s->nb_streams; r++) {
1411 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1412 if (s->streams[r]->discard != AVDISCARD_ALL) {
1414 av_strlcat(rt->last_subscription, ",",
1415 sizeof(rt->last_subscription));
1416 ff_rdt_subscribe_rule(
1417 rt->last_subscription,
1418 sizeof(rt->last_subscription), i, rule_nr);
1425 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1426 rtsp_send_cmd(s, cmd, reply, NULL);
1427 if (reply->status_code != RTSP_STATUS_OK)
1428 return AVERROR_INVALIDDATA;
1429 rt->need_subscription = 0;
1431 if (rt->state == RTSP_STATE_PLAYING)
1436 /* get next frames from the same RTP packet */
1437 if (rt->cur_transport_priv) {
1438 if (rt->transport == RTSP_TRANSPORT_RDT)
1439 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1441 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1443 rt->cur_transport_priv = NULL;
1445 } else if (ret == 1) {
1448 rt->cur_transport_priv = NULL;
1452 /* read next RTP packet */
1454 switch(rt->lower_transport) {
1456 case RTSP_LOWER_TRANSPORT_TCP:
1457 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1459 case RTSP_LOWER_TRANSPORT_UDP:
1460 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1461 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1462 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1463 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1468 if (rt->transport == RTSP_TRANSPORT_RDT)
1469 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1471 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1475 /* more packets may follow, so we save the RTP context */
1476 rt->cur_transport_priv = rtsp_st->transport_priv;
1481 static int rtsp_read_play(AVFormatContext *s)
1483 RTSPState *rt = s->priv_data;
1484 RTSPMessageHeader reply1, *reply = &reply1;
1487 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1489 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1490 if (rt->state == RTSP_STATE_PAUSED) {
1491 snprintf(cmd, sizeof(cmd),
1492 "PLAY %s RTSP/1.0\r\n",
1495 snprintf(cmd, sizeof(cmd),
1496 "PLAY %s RTSP/1.0\r\n"
1497 "Range: npt=%0.3f-\r\n",
1499 (double)rt->seek_timestamp / AV_TIME_BASE);
1501 rtsp_send_cmd(s, cmd, reply, NULL);
1502 if (reply->status_code != RTSP_STATUS_OK) {
1506 rt->state = RTSP_STATE_PLAYING;
1510 /* pause the stream */
1511 static int rtsp_read_pause(AVFormatContext *s)
1513 RTSPState *rt = s->priv_data;
1514 RTSPMessageHeader reply1, *reply = &reply1;
1519 if (rt->state != RTSP_STATE_PLAYING)
1521 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1522 snprintf(cmd, sizeof(cmd),
1523 "PAUSE %s RTSP/1.0\r\n",
1525 rtsp_send_cmd(s, cmd, reply, NULL);
1526 if (reply->status_code != RTSP_STATUS_OK) {
1530 rt->state = RTSP_STATE_PAUSED;
1534 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1535 int64_t timestamp, int flags)
1537 RTSPState *rt = s->priv_data;
1539 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1542 case RTSP_STATE_IDLE:
1544 case RTSP_STATE_PLAYING:
1545 if (rtsp_read_play(s) != 0)
1548 case RTSP_STATE_PAUSED:
1549 rt->state = RTSP_STATE_IDLE;
1555 static int rtsp_read_close(AVFormatContext *s)
1557 RTSPState *rt = s->priv_data;
1558 RTSPMessageHeader reply1, *reply = &reply1;
1562 /* NOTE: it is valid to flush the buffer here */
1563 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1564 url_fclose(&rt->rtsp_gb);
1567 snprintf(cmd, sizeof(cmd),
1568 "TEARDOWN %s RTSP/1.0\r\n",
1570 rtsp_send_cmd(s, cmd, reply, NULL);
1572 rtsp_close_streams(rt);
1573 url_close(rt->rtsp_hd);
1577 #if CONFIG_RTSP_DEMUXER
1578 AVInputFormat rtsp_demuxer = {
1580 NULL_IF_CONFIG_SMALL("RTSP input format"),
1587 .flags = AVFMT_NOFILE,
1588 .read_play = rtsp_read_play,
1589 .read_pause = rtsp_read_pause,
1593 static int sdp_probe(AVProbeData *p1)
1595 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1597 /* we look for a line beginning "c=IN IP4" */
1598 while (p < p_end && *p != '\0') {
1599 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1600 return AVPROBE_SCORE_MAX / 2;
1602 while(p < p_end - 1 && *p != '\n') p++;
1611 #define SDP_MAX_SIZE 8192
1613 static int sdp_read_header(AVFormatContext *s,
1614 AVFormatParameters *ap)
1616 RTSPState *rt = s->priv_data;
1617 RTSPStream *rtsp_st;
1622 /* read the whole sdp file */
1623 /* XXX: better loading */
1624 content = av_malloc(SDP_MAX_SIZE);
1625 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1628 return AVERROR_INVALIDDATA;
1630 content[size] ='\0';
1632 sdp_parse(s, content);
1635 /* open each RTP stream */
1636 for(i=0;i<rt->nb_rtsp_streams;i++) {
1637 rtsp_st = rt->rtsp_streams[i];
1639 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1640 inet_ntoa(rtsp_st->sdp_ip),
1644 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1645 err = AVERROR_INVALIDDATA;
1648 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1653 rtsp_close_streams(rt);
1657 static int sdp_read_packet(AVFormatContext *s,
1660 return rtsp_read_packet(s, pkt);
1663 static int sdp_read_close(AVFormatContext *s)
1665 RTSPState *rt = s->priv_data;
1666 rtsp_close_streams(rt);
1670 #if CONFIG_SDP_DEMUXER
1671 AVInputFormat sdp_demuxer = {
1673 NULL_IF_CONFIG_SMALL("SDP"),
1682 #if CONFIG_REDIR_DEMUXER
1683 /* dummy redirector format (used directly in av_open_input_file now) */
1684 static int redir_probe(AVProbeData *pd)
1688 while (redir_isspace(*p))
1690 if (av_strstart(p, "http://", NULL) ||
1691 av_strstart(p, "rtsp://", NULL))
1692 return AVPROBE_SCORE_MAX;
1696 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1700 AVFormatContext *ic = NULL;
1701 ByteIOContext *f = s->pb;
1703 /* parse each URL and try to open it */
1705 while (c != URL_EOF) {
1708 if (!redir_isspace(c))
1717 if (c == URL_EOF || redir_isspace(c))
1719 if ((q - buf) < sizeof(buf) - 1)
1724 //printf("URL='%s'\n", buf);
1725 /* try to open the media file */
1726 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1730 return AVERROR(EIO);
1738 AVInputFormat redir_demuxer = {
1740 NULL_IF_CONFIG_SMALL("Redirector format"),