3 * Copyright (c) 2002 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <unistd.h> /* for select() prototype */
23 #include <netinet/in.h>
24 #include <sys/socket.h>
26 # include <arpa/inet.h>
28 # include "barpainet.h"
32 //#define DEBUG_RTP_TCP
34 enum RTSPClientState {
40 typedef struct RTSPState {
41 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
43 struct RTSPStream **rtsp_streams;
45 enum RTSPClientState state;
46 int64_t seek_timestamp;
48 /* XXX: currently we use unbuffered input */
49 // ByteIOContext rtsp_gb;
50 int seq; /* RTSP command sequence number */
52 enum RTSPProtocol protocol;
53 char last_reply[2048]; /* XXX: allocate ? */
54 RTPDemuxContext *cur_rtp;
57 typedef struct RTSPStream {
58 URLContext *rtp_handle; /* RTP stream handle */
59 RTPDemuxContext *rtp_ctx; /* RTP parse context */
61 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
62 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
63 char control_url[1024]; /* url for this stream (from SDP) */
65 int sdp_port; /* port (from SDP content - not used in RTSP) */
66 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
67 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
68 int sdp_payload_type; /* payload type - only used in SDP */
71 static int rtsp_read_play(AVFormatContext *s);
73 /* XXX: currently, the only way to change the protocols consists in
74 changing this variable */
76 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_TCP) | (1 << RTSP_PROTOCOL_RTP_UDP) | (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST);
78 /* try it if a proxy is used */
79 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_TCP);
82 /* if non zero, then set a range for RTP ports */
83 int rtsp_rtp_port_min = 0;
84 int rtsp_rtp_port_max = 0;
86 FFRTSPCallback *ff_rtsp_callback = NULL;
88 static int rtsp_probe(AVProbeData *p)
90 if (strstart(p->filename, "rtsp:", NULL))
91 return AVPROBE_SCORE_MAX;
95 static int redir_isspace(int c)
97 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
100 static void skip_spaces(const char **pp)
104 while (redir_isspace(*p))
109 static void get_word_sep(char *buf, int buf_size, const char *sep,
118 while (!strchr(sep, *p) && *p != '\0') {
119 if ((q - buf) < buf_size - 1)
128 static void get_word(char *buf, int buf_size, const char **pp)
136 while (!redir_isspace(*p) && *p != '\0') {
137 if ((q - buf) < buf_size - 1)
146 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
148 static int sdp_parse_rtpmap(AVCodecContext *codec, const char *p)
153 get_word_sep(buf, sizeof(buf), "/", &p);
154 if (!strcmp(buf, "MP4V-ES")) {
155 codec->codec_id = CODEC_ID_MPEG4;
162 /* return the length and optionnaly the data */
163 static int hex_to_data(uint8_t *data, const char *p)
173 c = toupper((unsigned char)*p++);
174 if (c >= '0' && c <= '9')
176 else if (c >= 'A' && c <= 'F')
191 static void sdp_parse_fmtp(AVCodecContext *codec, const char *p)
197 /* loop on each attribute */
202 get_word_sep(attr, sizeof(attr), "=", &p);
205 get_word_sep(value, sizeof(value), ";", &p);
208 /* handle MPEG4 video */
209 switch(codec->codec_id) {
211 if (!strcmp(attr, "config")) {
212 /* decode the hexa encoded parameter */
213 len = hex_to_data(NULL, value);
214 codec->extradata = av_mallocz(len);
215 if (!codec->extradata)
217 codec->extradata_size = len;
218 hex_to_data(codec->extradata, value);
222 /* ignore data for other codecs */
226 // printf("'%s' = '%s'\n", attr, value);
230 typedef struct SDPParseState {
232 struct in_addr default_ip;
236 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
237 int letter, const char *buf)
239 RTSPState *rt = s->priv_data;
240 char buf1[64], st_type[64];
242 int codec_type, payload_type, i;
245 struct in_addr sdp_ip;
249 printf("sdp: %c='%s'\n", letter, buf);
255 get_word(buf1, sizeof(buf1), &p);
256 if (strcmp(buf1, "IN") != 0)
258 get_word(buf1, sizeof(buf1), &p);
259 if (strcmp(buf1, "IP4") != 0)
261 get_word_sep(buf1, sizeof(buf1), "/", &p);
262 if (inet_aton(buf1, &sdp_ip) == 0)
267 get_word_sep(buf1, sizeof(buf1), "/", &p);
270 if (s->nb_streams == 0) {
271 s1->default_ip = sdp_ip;
272 s1->default_ttl = ttl;
274 st = s->streams[s->nb_streams - 1];
275 rtsp_st = st->priv_data;
276 rtsp_st->sdp_ip = sdp_ip;
277 rtsp_st->sdp_ttl = ttl;
281 pstrcpy(s->title, sizeof(s->title), p);
284 if (s->nb_streams == 0) {
285 pstrcpy(s->comment, sizeof(s->comment), p);
291 get_word(st_type, sizeof(st_type), &p);
292 if (!strcmp(st_type, "audio")) {
293 codec_type = CODEC_TYPE_AUDIO;
294 } else if (!strcmp(st_type, "video")) {
295 codec_type = CODEC_TYPE_VIDEO;
299 rtsp_st = av_mallocz(sizeof(RTSPStream));
302 rtsp_st->stream_index = -1;
303 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
305 rtsp_st->sdp_ip = s1->default_ip;
306 rtsp_st->sdp_ttl = s1->default_ttl;
308 get_word(buf1, sizeof(buf1), &p); /* port */
309 rtsp_st->sdp_port = atoi(buf1);
311 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
313 /* XXX: handle list of formats */
314 get_word(buf1, sizeof(buf1), &p); /* format list */
315 rtsp_st->sdp_payload_type = atoi(buf1);
317 if (rtsp_st->sdp_payload_type == RTP_PT_MPEG2TS) {
318 /* no corresponding stream */
320 st = av_new_stream(s, 0);
323 st->priv_data = rtsp_st;
324 rtsp_st->stream_index = st->index;
325 st->codec.codec_type = codec_type;
326 if (rtsp_st->sdp_payload_type < 96) {
327 /* if standard payload type, we can find the codec right now */
328 rtp_get_codec_info(&st->codec, rtsp_st->sdp_payload_type);
331 /* put a default control url */
332 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
335 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
337 /* get the control url */
338 st = s->streams[s->nb_streams - 1];
339 rtsp_st = st->priv_data;
341 /* XXX: may need to add full url resolution */
342 url_split(proto, sizeof(proto), NULL, 0, NULL, NULL, 0, p);
343 if (proto[0] == '\0') {
344 /* relative control URL */
345 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
346 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
348 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
350 } else if (strstart(p, "rtpmap:", &p)) {
351 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
352 get_word(buf1, sizeof(buf1), &p);
353 payload_type = atoi(buf1);
354 for(i = 0; i < s->nb_streams;i++) {
356 rtsp_st = st->priv_data;
357 if (rtsp_st->sdp_payload_type == payload_type) {
358 sdp_parse_rtpmap(&st->codec, p);
361 } else if (strstart(p, "fmtp:", &p)) {
362 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
363 get_word(buf1, sizeof(buf1), &p);
364 payload_type = atoi(buf1);
365 for(i = 0; i < s->nb_streams;i++) {
367 rtsp_st = st->priv_data;
368 if (rtsp_st->sdp_payload_type == payload_type) {
369 sdp_parse_fmtp(&st->codec, p);
377 static int sdp_parse(AVFormatContext *s, const char *content)
382 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
384 memset(s1, 0, sizeof(SDPParseState));
395 /* get the content */
397 while (*p != '\n' && *p != '\r' && *p != '\0') {
398 if ((q - buf) < sizeof(buf) - 1)
403 sdp_parse_line(s, s1, letter, buf);
405 while (*p != '\n' && *p != '\0')
413 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
420 v = strtol(p, (char **)&p, 10);
424 v = strtol(p, (char **)&p, 10);
433 /* XXX: only one transport specification is parsed */
434 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
436 char transport_protocol[16];
438 char lower_transport[16];
440 RTSPTransportField *th;
443 reply->nb_transports = 0;
450 th = &reply->transports[reply->nb_transports];
452 get_word_sep(transport_protocol, sizeof(transport_protocol),
456 get_word_sep(profile, sizeof(profile), "/;,", &p);
457 lower_transport[0] = '\0';
460 get_word_sep(lower_transport, sizeof(lower_transport),
463 if (!strcasecmp(lower_transport, "TCP"))
464 th->protocol = RTSP_PROTOCOL_RTP_TCP;
466 th->protocol = RTSP_PROTOCOL_RTP_UDP;
470 /* get each parameter */
471 while (*p != '\0' && *p != ',') {
472 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
473 if (!strcmp(parameter, "port")) {
476 rtsp_parse_range(&th->port_min, &th->port_max, &p);
478 } else if (!strcmp(parameter, "client_port")) {
481 rtsp_parse_range(&th->client_port_min,
482 &th->client_port_max, &p);
484 } else if (!strcmp(parameter, "server_port")) {
487 rtsp_parse_range(&th->server_port_min,
488 &th->server_port_max, &p);
490 } else if (!strcmp(parameter, "interleaved")) {
493 rtsp_parse_range(&th->interleaved_min,
494 &th->interleaved_max, &p);
496 } else if (!strcmp(parameter, "multicast")) {
497 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
498 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
499 } else if (!strcmp(parameter, "ttl")) {
502 th->ttl = strtol(p, (char **)&p, 10);
504 } else if (!strcmp(parameter, "destination")) {
505 struct in_addr ipaddr;
509 get_word_sep(buf, sizeof(buf), ";,", &p);
510 if (inet_aton(buf, &ipaddr))
511 th->destination = ntohl(ipaddr.s_addr);
514 while (*p != ';' && *p != '\0' && *p != ',')
522 reply->nb_transports++;
526 static void rtsp_parse_range_npt(RTSPHeader *reply, const char *p)
531 if (!stristart(p, "npt=", &p))
534 reply->range_start = AV_NOPTS_VALUE;
535 reply->range_end = AV_NOPTS_VALUE;
537 get_word_sep(buf, sizeof(buf), "-", &p);
538 reply->range_start = parse_date(buf, 1);
541 get_word_sep(buf, sizeof(buf), "-", &p);
542 reply->range_end = parse_date(buf, 1);
546 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
550 /* NOTE: we do case independent match for broken servers */
552 if (stristart(p, "Session:", &p)) {
553 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
554 } else if (stristart(p, "Content-Length:", &p)) {
555 reply->content_length = strtol(p, NULL, 10);
556 } else if (stristart(p, "Transport:", &p)) {
557 rtsp_parse_transport(reply, p);
558 } else if (stristart(p, "CSeq:", &p)) {
559 reply->seq = strtol(p, NULL, 10);
560 } else if (stristart(p, "Range:", &p)) {
561 rtsp_parse_range_npt(reply, p);
565 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
571 ret = url_read(h, buf+len, size-len);
579 /* skip a RTP/TCP interleaved packet */
580 static void rtsp_skip_packet(AVFormatContext *s)
582 RTSPState *rt = s->priv_data;
586 ret = url_readbuf(rt->rtsp_hd, buf, 3);
589 len = (buf[1] << 8) | buf[2];
591 printf("skipping RTP packet len=%d\n", len);
596 if (len1 > sizeof(buf))
598 ret = url_readbuf(rt->rtsp_hd, buf, len1);
605 static void rtsp_send_cmd(AVFormatContext *s,
606 const char *cmd, RTSPHeader *reply,
607 unsigned char **content_ptr)
609 RTSPState *rt = s->priv_data;
610 char buf[4096], buf1[1024], *q;
613 int content_length, line_count;
614 unsigned char *content = NULL;
616 memset(reply, 0, sizeof(RTSPHeader));
619 pstrcpy(buf, sizeof(buf), cmd);
620 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
621 pstrcat(buf, sizeof(buf), buf1);
622 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
623 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
624 pstrcat(buf, sizeof(buf), buf1);
626 pstrcat(buf, sizeof(buf), "\r\n");
628 printf("Sending:\n%s--\n", buf);
630 url_write(rt->rtsp_hd, buf, strlen(buf));
632 /* parse reply (XXX: use buffers) */
634 rt->last_reply[0] = '\0';
638 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
643 /* XXX: only parse it if first char on line ? */
645 } else if (ch != '\r') {
646 if ((q - buf) < sizeof(buf) - 1)
652 printf("line='%s'\n", buf);
654 /* test if last line */
658 if (line_count == 0) {
660 get_word(buf1, sizeof(buf1), &p);
661 get_word(buf1, sizeof(buf1), &p);
662 reply->status_code = atoi(buf1);
664 rtsp_parse_line(reply, p);
665 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
666 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
671 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
672 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
674 content_length = reply->content_length;
675 if (content_length > 0) {
676 /* leave some room for a trailing '\0' (useful for simple parsing) */
677 content = av_malloc(content_length + 1);
678 (void)url_readbuf(rt->rtsp_hd, content, content_length);
679 content[content_length] = '\0';
682 *content_ptr = content;
685 /* useful for modules: set RTSP callback function */
687 void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
689 ff_rtsp_callback = rtsp_cb;
693 /* close and free RTSP streams */
694 static void rtsp_close_streams(RTSPState *rt)
699 for(i=0;i<rt->nb_rtsp_streams;i++) {
700 rtsp_st = rt->rtsp_streams[i];
702 if (rtsp_st->rtp_ctx)
703 rtp_parse_close(rtsp_st->rtp_ctx);
704 if (rtsp_st->rtp_handle)
705 url_close(rtsp_st->rtp_handle);
709 av_free(rt->rtsp_streams);
712 static int rtsp_read_header(AVFormatContext *s,
713 AVFormatParameters *ap)
715 RTSPState *rt = s->priv_data;
716 char host[1024], path[1024], tcpname[1024], cmd[2048];
718 int port, i, ret, err;
719 RTSPHeader reply1, *reply = &reply1;
720 unsigned char *content = NULL;
725 /* extract hostname and port */
727 host, sizeof(host), &port, path, sizeof(path), s->filename);
729 port = RTSP_DEFAULT_PORT;
731 /* open the tcp connexion */
732 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
733 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
735 rt->rtsp_hd = rtsp_hd;
738 /* describe the stream */
739 snprintf(cmd, sizeof(cmd),
740 "DESCRIBE %s RTSP/1.0\r\n"
741 "Accept: application/sdp\r\n",
743 rtsp_send_cmd(s, cmd, reply, &content);
745 err = AVERROR_INVALIDDATA;
748 if (reply->status_code != RTSP_STATUS_OK) {
749 err = AVERROR_INVALIDDATA;
753 /* now we got the SDP description, we parse it */
754 ret = sdp_parse(s, (const char *)content);
757 err = AVERROR_INVALIDDATA;
761 protocol_mask = rtsp_default_protocols;
763 /* for each stream, make the setup request */
764 /* XXX: we assume the same server is used for the control of each
766 for(i=0;i<rt->nb_rtsp_streams;i++) {
767 char transport[2048];
769 rtsp_st = rt->rtsp_streams[i];
771 /* compute available transports */
775 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
779 /* first try in specified port range */
780 if (rtsp_rtp_port_min != 0) {
781 for(j=rtsp_rtp_port_min;j<=rtsp_rtp_port_max;j++) {
782 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
783 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDONLY) == 0)
788 /* then try on any port */
789 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
790 err = AVERROR_INVALIDDATA;
795 port = rtp_get_local_port(rtsp_st->rtp_handle);
796 if (transport[0] != '\0')
797 pstrcat(transport, sizeof(transport), ",");
798 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
799 "RTP/AVP/UDP;unicast;client_port=%d-%d",
804 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
805 if (transport[0] != '\0')
806 pstrcat(transport, sizeof(transport), ",");
807 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
811 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
812 if (transport[0] != '\0')
813 pstrcat(transport, sizeof(transport), ",");
814 snprintf(transport + strlen(transport),
815 sizeof(transport) - strlen(transport) - 1,
816 "RTP/AVP/UDP;multicast");
818 snprintf(cmd, sizeof(cmd),
819 "SETUP %s RTSP/1.0\r\n"
821 rtsp_st->control_url, transport);
822 rtsp_send_cmd(s, cmd, reply, NULL);
823 if (reply->status_code != RTSP_STATUS_OK ||
824 reply->nb_transports != 1) {
825 err = AVERROR_INVALIDDATA;
829 /* XXX: same protocol for all streams is required */
831 if (reply->transports[0].protocol != rt->protocol) {
832 err = AVERROR_INVALIDDATA;
836 rt->protocol = reply->transports[0].protocol;
839 /* close RTP connection if not choosen */
840 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
841 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
842 url_close(rtsp_st->rtp_handle);
843 rtsp_st->rtp_handle = NULL;
846 switch(reply->transports[0].protocol) {
847 case RTSP_PROTOCOL_RTP_TCP:
848 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
849 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
852 case RTSP_PROTOCOL_RTP_UDP:
856 /* XXX: also use address if specified */
857 snprintf(url, sizeof(url), "rtp://%s:%d",
858 host, reply->transports[0].server_port_min);
859 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
860 err = AVERROR_INVALIDDATA;
865 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
870 ttl = reply->transports[0].ttl;
873 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
875 reply->transports[0].server_port_min,
877 if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) {
878 err = AVERROR_INVALIDDATA;
884 /* open the RTP context */
886 if (rtsp_st->stream_index >= 0)
887 st = s->streams[rtsp_st->stream_index];
889 s->ctx_flags |= AVFMTCTX_NOHEADER;
890 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type);
891 if (!rtsp_st->rtp_ctx) {
897 /* use callback if available to extend setup */
898 if (ff_rtsp_callback) {
899 if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
900 NULL, 0, rt->last_reply) < 0) {
901 err = AVERROR_INVALIDDATA;
907 rt->state = RTSP_STATE_IDLE;
908 rt->seek_timestamp = 0; /* default is to start stream at position
910 if (ap && ap->initial_pause) {
911 /* do not start immediately */
913 if (rtsp_read_play(s) < 0) {
914 err = AVERROR_INVALIDDATA;
920 rtsp_close_streams(rt);
922 url_close(rt->rtsp_hd);
926 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
927 uint8_t *buf, int buf_size)
929 RTSPState *rt = s->priv_data;
934 printf("tcp_read_packet:\n");
938 ret = url_readbuf(rt->rtsp_hd, buf, 1);
940 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
947 ret = url_readbuf(rt->rtsp_hd, buf, 3);
951 len = (buf[1] << 8) | buf[2];
953 printf("id=%d len=%d\n", id, len);
955 if (len > buf_size || len < 12)
958 ret = url_readbuf(rt->rtsp_hd, buf, len);
962 /* find the matching stream */
963 for(i = 0; i < rt->nb_rtsp_streams; i++) {
964 rtsp_st = rt->rtsp_streams[i];
965 if (id >= rtsp_st->interleaved_min &&
966 id <= rtsp_st->interleaved_max)
975 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
976 uint8_t *buf, int buf_size)
978 RTSPState *rt = s->priv_data;
981 int fd1, fd2, fd_max, n, i, ret;
985 if (url_interrupt_cb())
989 for(i = 0; i < rt->nb_rtsp_streams; i++) {
990 rtsp_st = rt->rtsp_streams[i];
991 /* currently, we cannot probe RTCP handle because of blocking restrictions */
992 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
998 tv.tv_usec = 100 * 1000;
999 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1001 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1002 rtsp_st = rt->rtsp_streams[i];
1003 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1004 if (FD_ISSET(fd1, &rfds)) {
1005 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1007 *prtsp_st = rtsp_st;
1016 static int rtsp_read_packet(AVFormatContext *s,
1019 RTSPState *rt = s->priv_data;
1020 RTSPStream *rtsp_st;
1022 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1024 /* get next frames from the same RTP packet */
1026 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1030 } else if (ret == 1) {
1037 /* read next RTP packet */
1039 switch(rt->protocol) {
1041 case RTSP_PROTOCOL_RTP_TCP:
1042 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1044 case RTSP_PROTOCOL_RTP_UDP:
1045 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1046 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1051 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1055 /* more packets may follow, so we save the RTP context */
1056 rt->cur_rtp = rtsp_st->rtp_ctx;
1061 static int rtsp_read_play(AVFormatContext *s)
1063 RTSPState *rt = s->priv_data;
1064 RTSPHeader reply1, *reply = &reply1;
1067 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1069 if (rt->state == RTSP_STATE_PAUSED) {
1070 snprintf(cmd, sizeof(cmd),
1071 "PLAY %s RTSP/1.0\r\n",
1074 snprintf(cmd, sizeof(cmd),
1075 "PLAY %s RTSP/1.0\r\n"
1076 "Range: npt=%0.3f-\r\n",
1078 (double)rt->seek_timestamp / AV_TIME_BASE);
1080 rtsp_send_cmd(s, cmd, reply, NULL);
1081 if (reply->status_code != RTSP_STATUS_OK) {
1084 rt->state = RTSP_STATE_PLAYING;
1089 /* pause the stream */
1090 static int rtsp_read_pause(AVFormatContext *s)
1092 RTSPState *rt = s->priv_data;
1093 RTSPHeader reply1, *reply = &reply1;
1098 if (rt->state != RTSP_STATE_PLAYING)
1101 snprintf(cmd, sizeof(cmd),
1102 "PAUSE %s RTSP/1.0\r\n",
1104 rtsp_send_cmd(s, cmd, reply, NULL);
1105 if (reply->status_code != RTSP_STATUS_OK) {
1108 rt->state = RTSP_STATE_PAUSED;
1113 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1116 RTSPState *rt = s->priv_data;
1118 rt->seek_timestamp = timestamp;
1121 case RTSP_STATE_IDLE:
1123 case RTSP_STATE_PLAYING:
1124 if (rtsp_read_play(s) != 0)
1127 case RTSP_STATE_PAUSED:
1128 rt->state = RTSP_STATE_IDLE;
1134 static int rtsp_read_close(AVFormatContext *s)
1136 RTSPState *rt = s->priv_data;
1137 RTSPHeader reply1, *reply = &reply1;
1141 /* NOTE: it is valid to flush the buffer here */
1142 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1143 url_fclose(&rt->rtsp_gb);
1146 snprintf(cmd, sizeof(cmd),
1147 "TEARDOWN %s RTSP/1.0\r\n",
1149 rtsp_send_cmd(s, cmd, reply, NULL);
1151 if (ff_rtsp_callback) {
1152 ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
1156 rtsp_close_streams(rt);
1157 url_close(rt->rtsp_hd);
1161 AVInputFormat rtsp_demux = {
1163 "RTSP input format",
1170 .flags = AVFMT_NOFILE,
1171 .read_play = rtsp_read_play,
1172 .read_pause = rtsp_read_pause,
1175 static int sdp_probe(AVProbeData *p1)
1179 /* we look for a line beginning "c=IN IP4" */
1181 while (*p != '\0') {
1182 if (strstart(p, "c=IN IP4", NULL))
1183 return AVPROBE_SCORE_MAX / 2;
1184 p = strchr(p, '\n');
1194 #define SDP_MAX_SIZE 8192
1196 static int sdp_read_header(AVFormatContext *s,
1197 AVFormatParameters *ap)
1199 RTSPState *rt = s->priv_data;
1200 RTSPStream *rtsp_st;
1206 /* read the whole sdp file */
1207 /* XXX: better loading */
1208 content = av_malloc(SDP_MAX_SIZE);
1209 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1212 return AVERROR_INVALIDDATA;
1214 content[size] ='\0';
1216 sdp_parse(s, content);
1219 /* open each RTP stream */
1220 for(i=0;i<rt->nb_rtsp_streams;i++) {
1221 rtsp_st = rt->rtsp_streams[i];
1223 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1224 inet_ntoa(rtsp_st->sdp_ip),
1227 if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) {
1228 err = AVERROR_INVALIDDATA;
1231 /* open the RTP context */
1233 if (rtsp_st->stream_index >= 0)
1234 st = s->streams[rtsp_st->stream_index];
1236 s->ctx_flags |= AVFMTCTX_NOHEADER;
1237 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type);
1238 if (!rtsp_st->rtp_ctx) {
1239 err = AVERROR_NOMEM;
1245 rtsp_close_streams(rt);
1249 static int sdp_read_packet(AVFormatContext *s,
1252 return rtsp_read_packet(s, pkt);
1255 static int sdp_read_close(AVFormatContext *s)
1257 RTSPState *rt = s->priv_data;
1258 rtsp_close_streams(rt);
1263 static AVInputFormat sdp_demux = {
1274 /* dummy redirector format (used directly in av_open_input_file now) */
1275 static int redir_probe(AVProbeData *pd)
1279 while (redir_isspace(*p))
1281 if (strstart(p, "http://", NULL) ||
1282 strstart(p, "rtsp://", NULL))
1283 return AVPROBE_SCORE_MAX;
1287 /* called from utils.c */
1288 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1292 AVFormatContext *ic = NULL;
1294 /* parse each URL and try to open it */
1296 while (c != URL_EOF) {
1299 if (!redir_isspace(c))
1308 if (c == URL_EOF || redir_isspace(c))
1310 if ((q - buf) < sizeof(buf) - 1)
1315 //printf("URL='%s'\n", buf);
1316 /* try to open the media file */
1317 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1327 AVInputFormat redir_demux = {
1329 "Redirector format",
1339 av_register_input_format(&rtsp_demux);
1340 av_register_input_format(&redir_demux);
1341 av_register_input_format(&sdp_demux);