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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 */
69 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
72 static int rtsp_read_play(AVFormatContext *s);
74 /* XXX: currently, the only way to change the protocols consists in
75 changing this variable */
77 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
79 FFRTSPCallback *ff_rtsp_callback = NULL;
81 static int rtsp_probe(AVProbeData *p)
83 if (strstart(p->filename, "rtsp:", NULL))
84 return AVPROBE_SCORE_MAX;
88 static int redir_isspace(int c)
90 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
93 static void skip_spaces(const char **pp)
97 while (redir_isspace(*p))
102 static void get_word_sep(char *buf, int buf_size, const char *sep,
113 while (!strchr(sep, *p) && *p != '\0') {
114 if ((q - buf) < buf_size - 1)
123 static void get_word(char *buf, int buf_size, const char **pp)
131 while (!redir_isspace(*p) && *p != '\0') {
132 if ((q - buf) < buf_size - 1)
141 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
143 static int sdp_parse_rtpmap(AVCodecContext *codec, int payload_type, const char *p)
150 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
151 see if we can handle this kind of payload */
152 get_word_sep(buf, sizeof(buf), "/", &p);
153 if (payload_type >= RTP_PT_PRIVATE) {
154 /* We are in dynmaic payload type case ... search into AVRtpDynamicPayloadTypes[] */
155 for (i = 0; AVRtpDynamicPayloadTypes[i].codec_id != CODEC_ID_NONE; ++i)
156 if (!strcmp(buf, AVRtpDynamicPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpDynamicPayloadTypes[i].codec_type)) {
157 codec->codec_id = AVRtpDynamicPayloadTypes[i].codec_id;
161 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
162 /* search into AVRtpPayloadTypes[] */
163 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
164 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
165 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
170 c = avcodec_find_decoder(codec->codec_id);
172 c_name = (char *)c->name;
174 c_name = (char *)NULL;
177 get_word_sep(buf, sizeof(buf), "/", &p);
179 switch (codec->codec_type) {
180 case CODEC_TYPE_AUDIO:
181 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
182 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
183 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
185 codec->sample_rate = i;
186 get_word_sep(buf, sizeof(buf), "/", &p);
191 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
192 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
194 case CODEC_TYPE_VIDEO:
195 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
206 /* return the length and optionnaly the data */
207 static int hex_to_data(uint8_t *data, const char *p)
217 c = toupper((unsigned char)*p++);
218 if (c >= '0' && c <= '9')
220 else if (c >= 'A' && c <= 'F')
235 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
237 switch (codec->codec_id) {
239 case CODEC_ID_MPEG4AAC:
240 if (!strcmp(attr, "config")) {
241 /* decode the hexa encoded parameter */
242 int len = hex_to_data(NULL, value);
243 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
244 if (!codec->extradata)
246 codec->extradata_size = len;
247 hex_to_data(codec->extradata, value);
256 typedef struct attrname_map
263 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
264 #define ATTR_NAME_TYPE_INT 0
265 #define ATTR_NAME_TYPE_STR 1
266 static attrname_map_t attr_names[]=
268 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
269 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
270 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
271 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
272 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
273 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
277 /* parse a SDP line and save stream attributes */
278 static void sdp_parse_fmtp(AVStream *st, const char *p)
284 RTSPStream *rtsp_st = st->priv_data;
285 AVCodecContext *codec = st->codec;
286 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
288 /* loop on each attribute */
293 get_word_sep(attr, sizeof(attr), "=", &p);
296 get_word_sep(value, sizeof(value), ";", &p);
299 /* grab the codec extra_data from the config parameter of the fmtp line */
300 sdp_parse_fmtp_config(codec, attr, value);
301 /* Looking for a known attribute */
302 for (i = 0; attr_names[i].str; ++i) {
303 if (!strcasecmp(attr, attr_names[i].str)) {
304 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
305 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
306 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
307 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
313 typedef struct SDPParseState {
315 struct in_addr default_ip;
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 int codec_type, payload_type, i;
328 struct in_addr sdp_ip;
332 printf("sdp: %c='%s'\n", letter, buf);
338 get_word(buf1, sizeof(buf1), &p);
339 if (strcmp(buf1, "IN") != 0)
341 get_word(buf1, sizeof(buf1), &p);
342 if (strcmp(buf1, "IP4") != 0)
344 get_word_sep(buf1, sizeof(buf1), "/", &p);
345 if (inet_aton(buf1, &sdp_ip) == 0)
350 get_word_sep(buf1, sizeof(buf1), "/", &p);
353 if (s->nb_streams == 0) {
354 s1->default_ip = sdp_ip;
355 s1->default_ttl = ttl;
357 st = s->streams[s->nb_streams - 1];
358 rtsp_st = st->priv_data;
359 rtsp_st->sdp_ip = sdp_ip;
360 rtsp_st->sdp_ttl = ttl;
364 pstrcpy(s->title, sizeof(s->title), p);
367 if (s->nb_streams == 0) {
368 pstrcpy(s->comment, sizeof(s->comment), p);
374 get_word(st_type, sizeof(st_type), &p);
375 if (!strcmp(st_type, "audio")) {
376 codec_type = CODEC_TYPE_AUDIO;
377 } else if (!strcmp(st_type, "video")) {
378 codec_type = CODEC_TYPE_VIDEO;
382 rtsp_st = av_mallocz(sizeof(RTSPStream));
385 rtsp_st->stream_index = -1;
386 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
388 rtsp_st->sdp_ip = s1->default_ip;
389 rtsp_st->sdp_ttl = s1->default_ttl;
391 get_word(buf1, sizeof(buf1), &p); /* port */
392 rtsp_st->sdp_port = atoi(buf1);
394 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
396 /* XXX: handle list of formats */
397 get_word(buf1, sizeof(buf1), &p); /* format list */
398 rtsp_st->sdp_payload_type = atoi(buf1);
400 if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
401 /* no corresponding stream */
403 st = av_new_stream(s, 0);
406 st->priv_data = rtsp_st;
407 rtsp_st->stream_index = st->index;
408 st->codec->codec_type = codec_type;
409 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
410 /* if standard payload type, we can find the codec right now */
411 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
414 /* put a default control url */
415 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
418 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
420 /* get the control url */
421 st = s->streams[s->nb_streams - 1];
422 rtsp_st = st->priv_data;
424 /* XXX: may need to add full url resolution */
425 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
426 if (proto[0] == '\0') {
427 /* relative control URL */
428 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
429 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
431 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
433 } else if (strstart(p, "rtpmap:", &p)) {
434 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
435 get_word(buf1, sizeof(buf1), &p);
436 payload_type = atoi(buf1);
437 for(i = 0; i < s->nb_streams;i++) {
439 rtsp_st = st->priv_data;
440 if (rtsp_st->sdp_payload_type == payload_type) {
441 sdp_parse_rtpmap(st->codec, payload_type, p);
444 } else if (strstart(p, "fmtp:", &p)) {
445 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
446 get_word(buf1, sizeof(buf1), &p);
447 payload_type = atoi(buf1);
448 for(i = 0; i < s->nb_streams;i++) {
450 rtsp_st = st->priv_data;
451 if (rtsp_st->sdp_payload_type == payload_type) {
452 sdp_parse_fmtp(st, p);
460 static int sdp_parse(AVFormatContext *s, const char *content)
465 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
467 memset(s1, 0, sizeof(SDPParseState));
478 /* get the content */
480 while (*p != '\n' && *p != '\r' && *p != '\0') {
481 if ((q - buf) < sizeof(buf) - 1)
486 sdp_parse_line(s, s1, letter, buf);
488 while (*p != '\n' && *p != '\0')
496 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
503 v = strtol(p, (char **)&p, 10);
507 v = strtol(p, (char **)&p, 10);
516 /* XXX: only one transport specification is parsed */
517 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
519 char transport_protocol[16];
521 char lower_transport[16];
523 RTSPTransportField *th;
526 reply->nb_transports = 0;
533 th = &reply->transports[reply->nb_transports];
535 get_word_sep(transport_protocol, sizeof(transport_protocol),
539 get_word_sep(profile, sizeof(profile), "/;,", &p);
540 lower_transport[0] = '\0';
543 get_word_sep(lower_transport, sizeof(lower_transport),
546 if (!strcasecmp(lower_transport, "TCP"))
547 th->protocol = RTSP_PROTOCOL_RTP_TCP;
549 th->protocol = RTSP_PROTOCOL_RTP_UDP;
553 /* get each parameter */
554 while (*p != '\0' && *p != ',') {
555 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
556 if (!strcmp(parameter, "port")) {
559 rtsp_parse_range(&th->port_min, &th->port_max, &p);
561 } else if (!strcmp(parameter, "client_port")) {
564 rtsp_parse_range(&th->client_port_min,
565 &th->client_port_max, &p);
567 } else if (!strcmp(parameter, "server_port")) {
570 rtsp_parse_range(&th->server_port_min,
571 &th->server_port_max, &p);
573 } else if (!strcmp(parameter, "interleaved")) {
576 rtsp_parse_range(&th->interleaved_min,
577 &th->interleaved_max, &p);
579 } else if (!strcmp(parameter, "multicast")) {
580 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
581 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
582 } else if (!strcmp(parameter, "ttl")) {
585 th->ttl = strtol(p, (char **)&p, 10);
587 } else if (!strcmp(parameter, "destination")) {
588 struct in_addr ipaddr;
592 get_word_sep(buf, sizeof(buf), ";,", &p);
593 if (inet_aton(buf, &ipaddr))
594 th->destination = ntohl(ipaddr.s_addr);
597 while (*p != ';' && *p != '\0' && *p != ',')
605 reply->nb_transports++;
609 static void rtsp_parse_range_npt(RTSPHeader *reply, const char *p)
614 if (!stristart(p, "npt=", &p))
617 reply->range_start = AV_NOPTS_VALUE;
618 reply->range_end = AV_NOPTS_VALUE;
620 get_word_sep(buf, sizeof(buf), "-", &p);
621 reply->range_start = parse_date(buf, 1);
624 get_word_sep(buf, sizeof(buf), "-", &p);
625 reply->range_end = parse_date(buf, 1);
629 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
633 /* NOTE: we do case independent match for broken servers */
635 if (stristart(p, "Session:", &p)) {
636 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
637 } else if (stristart(p, "Content-Length:", &p)) {
638 reply->content_length = strtol(p, NULL, 10);
639 } else if (stristart(p, "Transport:", &p)) {
640 rtsp_parse_transport(reply, p);
641 } else if (stristart(p, "CSeq:", &p)) {
642 reply->seq = strtol(p, NULL, 10);
643 } else if (stristart(p, "Range:", &p)) {
644 rtsp_parse_range_npt(reply, p);
648 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
654 ret = url_read(h, buf+len, size-len);
662 /* skip a RTP/TCP interleaved packet */
663 static void rtsp_skip_packet(AVFormatContext *s)
665 RTSPState *rt = s->priv_data;
669 ret = url_readbuf(rt->rtsp_hd, buf, 3);
672 len = (buf[1] << 8) | buf[2];
674 printf("skipping RTP packet len=%d\n", len);
679 if (len1 > sizeof(buf))
681 ret = url_readbuf(rt->rtsp_hd, buf, len1);
688 static void rtsp_send_cmd(AVFormatContext *s,
689 const char *cmd, RTSPHeader *reply,
690 unsigned char **content_ptr)
692 RTSPState *rt = s->priv_data;
693 char buf[4096], buf1[1024], *q;
696 int content_length, line_count;
697 unsigned char *content = NULL;
699 memset(reply, 0, sizeof(RTSPHeader));
702 pstrcpy(buf, sizeof(buf), cmd);
703 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
704 pstrcat(buf, sizeof(buf), buf1);
705 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
706 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
707 pstrcat(buf, sizeof(buf), buf1);
709 pstrcat(buf, sizeof(buf), "\r\n");
711 printf("Sending:\n%s--\n", buf);
713 url_write(rt->rtsp_hd, buf, strlen(buf));
715 /* parse reply (XXX: use buffers) */
717 rt->last_reply[0] = '\0';
721 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
726 /* XXX: only parse it if first char on line ? */
728 } else if (ch != '\r') {
729 if ((q - buf) < sizeof(buf) - 1)
735 printf("line='%s'\n", buf);
737 /* test if last line */
741 if (line_count == 0) {
743 get_word(buf1, sizeof(buf1), &p);
744 get_word(buf1, sizeof(buf1), &p);
745 reply->status_code = atoi(buf1);
747 rtsp_parse_line(reply, p);
748 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
749 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
754 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
755 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
757 content_length = reply->content_length;
758 if (content_length > 0) {
759 /* leave some room for a trailing '\0' (useful for simple parsing) */
760 content = av_malloc(content_length + 1);
761 (void)url_readbuf(rt->rtsp_hd, content, content_length);
762 content[content_length] = '\0';
765 *content_ptr = content;
768 /* useful for modules: set RTSP callback function */
770 void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
772 ff_rtsp_callback = rtsp_cb;
776 /* close and free RTSP streams */
777 static void rtsp_close_streams(RTSPState *rt)
782 for(i=0;i<rt->nb_rtsp_streams;i++) {
783 rtsp_st = rt->rtsp_streams[i];
785 if (rtsp_st->rtp_ctx)
786 rtp_parse_close(rtsp_st->rtp_ctx);
787 if (rtsp_st->rtp_handle)
788 url_close(rtsp_st->rtp_handle);
792 av_free(rt->rtsp_streams);
795 static int rtsp_read_header(AVFormatContext *s,
796 AVFormatParameters *ap)
798 RTSPState *rt = s->priv_data;
799 char host[1024], path[1024], tcpname[1024], cmd[2048];
801 int port, i, j, ret, err;
802 RTSPHeader reply1, *reply = &reply1;
803 unsigned char *content = NULL;
808 /* extract hostname and port */
809 url_split(NULL, 0, NULL, 0,
810 host, sizeof(host), &port, path, sizeof(path), s->filename);
812 port = RTSP_DEFAULT_PORT;
814 /* open the tcp connexion */
815 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
816 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
818 rt->rtsp_hd = rtsp_hd;
821 /* describe the stream */
822 snprintf(cmd, sizeof(cmd),
823 "DESCRIBE %s RTSP/1.0\r\n"
824 "Accept: application/sdp\r\n",
826 rtsp_send_cmd(s, cmd, reply, &content);
828 err = AVERROR_INVALIDDATA;
831 if (reply->status_code != RTSP_STATUS_OK) {
832 err = AVERROR_INVALIDDATA;
836 /* now we got the SDP description, we parse it */
837 ret = sdp_parse(s, (const char *)content);
840 err = AVERROR_INVALIDDATA;
844 protocol_mask = rtsp_default_protocols;
846 /* for each stream, make the setup request */
847 /* XXX: we assume the same server is used for the control of each
850 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
851 char transport[2048];
853 rtsp_st = rt->rtsp_streams[i];
855 /* compute available transports */
859 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
862 /* first try in specified port range */
863 if (RTSP_RTP_PORT_MIN != 0) {
864 while(j <= RTSP_RTP_PORT_MAX) {
865 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
866 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDONLY) == 0) {
867 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
873 /* then try on any port
874 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
875 ** err = AVERROR_INVALIDDATA;
881 port = rtp_get_local_port(rtsp_st->rtp_handle);
882 if (transport[0] != '\0')
883 pstrcat(transport, sizeof(transport), ",");
884 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
885 "RTP/AVP/UDP;unicast;client_port=%d-%d",
890 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
891 if (transport[0] != '\0')
892 pstrcat(transport, sizeof(transport), ",");
893 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
897 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
898 if (transport[0] != '\0')
899 pstrcat(transport, sizeof(transport), ",");
900 snprintf(transport + strlen(transport),
901 sizeof(transport) - strlen(transport) - 1,
902 "RTP/AVP/UDP;multicast");
904 snprintf(cmd, sizeof(cmd),
905 "SETUP %s RTSP/1.0\r\n"
907 rtsp_st->control_url, transport);
908 rtsp_send_cmd(s, cmd, reply, NULL);
909 if (reply->status_code != RTSP_STATUS_OK ||
910 reply->nb_transports != 1) {
911 err = AVERROR_INVALIDDATA;
915 /* XXX: same protocol for all streams is required */
917 if (reply->transports[0].protocol != rt->protocol) {
918 err = AVERROR_INVALIDDATA;
922 rt->protocol = reply->transports[0].protocol;
925 /* close RTP connection if not choosen */
926 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
927 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
928 url_close(rtsp_st->rtp_handle);
929 rtsp_st->rtp_handle = NULL;
932 switch(reply->transports[0].protocol) {
933 case RTSP_PROTOCOL_RTP_TCP:
934 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
935 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
938 case RTSP_PROTOCOL_RTP_UDP:
942 /* XXX: also use address if specified */
943 snprintf(url, sizeof(url), "rtp://%s:%d",
944 host, reply->transports[0].server_port_min);
945 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
946 err = AVERROR_INVALIDDATA;
951 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
956 ttl = reply->transports[0].ttl;
959 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
961 reply->transports[0].server_port_min,
963 if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) {
964 err = AVERROR_INVALIDDATA;
970 /* open the RTP context */
972 if (rtsp_st->stream_index >= 0)
973 st = s->streams[rtsp_st->stream_index];
975 s->ctx_flags |= AVFMTCTX_NOHEADER;
976 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
978 if (!rtsp_st->rtp_ctx) {
984 /* use callback if available to extend setup */
985 if (ff_rtsp_callback) {
986 if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
987 NULL, 0, rt->last_reply) < 0) {
988 err = AVERROR_INVALIDDATA;
994 rt->state = RTSP_STATE_IDLE;
995 rt->seek_timestamp = 0; /* default is to start stream at position
997 if (ap && ap->initial_pause) {
998 /* do not start immediately */
1000 if (rtsp_read_play(s) < 0) {
1001 err = AVERROR_INVALIDDATA;
1007 rtsp_close_streams(rt);
1009 url_close(rt->rtsp_hd);
1013 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1014 uint8_t *buf, int buf_size)
1016 RTSPState *rt = s->priv_data;
1017 int id, len, i, ret;
1018 RTSPStream *rtsp_st;
1020 #ifdef DEBUG_RTP_TCP
1021 printf("tcp_read_packet:\n");
1025 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1026 #ifdef DEBUG_RTP_TCP
1027 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1034 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1038 len = (buf[1] << 8) | buf[2];
1039 #ifdef DEBUG_RTP_TCP
1040 printf("id=%d len=%d\n", id, len);
1042 if (len > buf_size || len < 12)
1045 ret = url_readbuf(rt->rtsp_hd, buf, len);
1049 /* find the matching stream */
1050 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1051 rtsp_st = rt->rtsp_streams[i];
1052 if (id >= rtsp_st->interleaved_min &&
1053 id <= rtsp_st->interleaved_max)
1058 *prtsp_st = rtsp_st;
1062 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1063 uint8_t *buf, int buf_size)
1065 RTSPState *rt = s->priv_data;
1066 RTSPStream *rtsp_st;
1068 int fd1, fd2, fd_max, n, i, ret;
1072 if (url_interrupt_cb())
1076 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1077 rtsp_st = rt->rtsp_streams[i];
1078 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1079 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1085 tv.tv_usec = 100 * 1000;
1086 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1088 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1089 rtsp_st = rt->rtsp_streams[i];
1090 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1091 if (FD_ISSET(fd1, &rfds)) {
1092 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1094 *prtsp_st = rtsp_st;
1103 static int rtsp_read_packet(AVFormatContext *s,
1106 RTSPState *rt = s->priv_data;
1107 RTSPStream *rtsp_st;
1109 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1111 /* get next frames from the same RTP packet */
1113 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1117 } else if (ret == 1) {
1124 /* read next RTP packet */
1126 switch(rt->protocol) {
1128 case RTSP_PROTOCOL_RTP_TCP:
1129 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1131 case RTSP_PROTOCOL_RTP_UDP:
1132 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1133 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1138 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1142 /* more packets may follow, so we save the RTP context */
1143 rt->cur_rtp = rtsp_st->rtp_ctx;
1148 static int rtsp_read_play(AVFormatContext *s)
1150 RTSPState *rt = s->priv_data;
1151 RTSPHeader reply1, *reply = &reply1;
1154 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1156 if (rt->state == RTSP_STATE_PAUSED) {
1157 snprintf(cmd, sizeof(cmd),
1158 "PLAY %s RTSP/1.0\r\n",
1161 snprintf(cmd, sizeof(cmd),
1162 "PLAY %s RTSP/1.0\r\n"
1163 "Range: npt=%0.3f-\r\n",
1165 (double)rt->seek_timestamp / AV_TIME_BASE);
1167 rtsp_send_cmd(s, cmd, reply, NULL);
1168 if (reply->status_code != RTSP_STATUS_OK) {
1171 rt->state = RTSP_STATE_PLAYING;
1176 /* pause the stream */
1177 static int rtsp_read_pause(AVFormatContext *s)
1179 RTSPState *rt = s->priv_data;
1180 RTSPHeader reply1, *reply = &reply1;
1185 if (rt->state != RTSP_STATE_PLAYING)
1188 snprintf(cmd, sizeof(cmd),
1189 "PAUSE %s RTSP/1.0\r\n",
1191 rtsp_send_cmd(s, cmd, reply, NULL);
1192 if (reply->status_code != RTSP_STATUS_OK) {
1195 rt->state = RTSP_STATE_PAUSED;
1200 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1201 int64_t timestamp, int flags)
1203 RTSPState *rt = s->priv_data;
1205 rt->seek_timestamp = timestamp;
1208 case RTSP_STATE_IDLE:
1210 case RTSP_STATE_PLAYING:
1211 if (rtsp_read_play(s) != 0)
1214 case RTSP_STATE_PAUSED:
1215 rt->state = RTSP_STATE_IDLE;
1221 static int rtsp_read_close(AVFormatContext *s)
1223 RTSPState *rt = s->priv_data;
1224 RTSPHeader reply1, *reply = &reply1;
1228 /* NOTE: it is valid to flush the buffer here */
1229 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1230 url_fclose(&rt->rtsp_gb);
1233 snprintf(cmd, sizeof(cmd),
1234 "TEARDOWN %s RTSP/1.0\r\n",
1236 rtsp_send_cmd(s, cmd, reply, NULL);
1238 if (ff_rtsp_callback) {
1239 ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
1243 rtsp_close_streams(rt);
1244 url_close(rt->rtsp_hd);
1248 AVInputFormat rtsp_demux = {
1250 "RTSP input format",
1257 .flags = AVFMT_NOFILE,
1258 .read_play = rtsp_read_play,
1259 .read_pause = rtsp_read_pause,
1262 static int sdp_probe(AVProbeData *p1)
1264 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1266 /* we look for a line beginning "c=IN IP4" */
1267 while (p < p_end && *p != '\0') {
1268 if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL))
1269 return AVPROBE_SCORE_MAX / 2;
1271 while(p < p_end - 1 && *p != '\n') p++;
1280 #define SDP_MAX_SIZE 8192
1282 static int sdp_read_header(AVFormatContext *s,
1283 AVFormatParameters *ap)
1285 RTSPState *rt = s->priv_data;
1286 RTSPStream *rtsp_st;
1292 /* read the whole sdp file */
1293 /* XXX: better loading */
1294 content = av_malloc(SDP_MAX_SIZE);
1295 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1298 return AVERROR_INVALIDDATA;
1300 content[size] ='\0';
1302 sdp_parse(s, content);
1305 /* open each RTP stream */
1306 for(i=0;i<rt->nb_rtsp_streams;i++) {
1307 rtsp_st = rt->rtsp_streams[i];
1309 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1310 inet_ntoa(rtsp_st->sdp_ip),
1313 if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) {
1314 err = AVERROR_INVALIDDATA;
1317 /* open the RTP context */
1319 if (rtsp_st->stream_index >= 0)
1320 st = s->streams[rtsp_st->stream_index];
1322 s->ctx_flags |= AVFMTCTX_NOHEADER;
1323 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1324 if (!rtsp_st->rtp_ctx) {
1325 err = AVERROR_NOMEM;
1331 rtsp_close_streams(rt);
1335 static int sdp_read_packet(AVFormatContext *s,
1338 return rtsp_read_packet(s, pkt);
1341 static int sdp_read_close(AVFormatContext *s)
1343 RTSPState *rt = s->priv_data;
1344 rtsp_close_streams(rt);
1349 static AVInputFormat sdp_demux = {
1360 /* dummy redirector format (used directly in av_open_input_file now) */
1361 static int redir_probe(AVProbeData *pd)
1365 while (redir_isspace(*p))
1367 if (strstart(p, "http://", NULL) ||
1368 strstart(p, "rtsp://", NULL))
1369 return AVPROBE_SCORE_MAX;
1373 /* called from utils.c */
1374 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1378 AVFormatContext *ic = NULL;
1380 /* parse each URL and try to open it */
1382 while (c != URL_EOF) {
1385 if (!redir_isspace(c))
1394 if (c == URL_EOF || redir_isspace(c))
1396 if ((q - buf) < sizeof(buf) - 1)
1401 //printf("URL='%s'\n", buf);
1402 /* try to open the media file */
1403 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1413 AVInputFormat redir_demux = {
1415 "Redirector format",
1425 av_register_input_format(&rtsp_demux);
1426 av_register_input_format(&redir_demux);
1427 av_register_input_format(&sdp_demux);