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
24 #include <unistd.h> /* for select() prototype */
27 #include "rtp_internal.h"
30 //#define DEBUG_RTP_TCP
32 enum RTSPClientState {
38 typedef struct RTSPState {
39 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
41 struct RTSPStream **rtsp_streams;
43 enum RTSPClientState state;
44 int64_t seek_timestamp;
46 /* XXX: currently we use unbuffered input */
47 // ByteIOContext rtsp_gb;
48 int seq; /* RTSP command sequence number */
50 enum RTSPProtocol protocol;
51 char last_reply[2048]; /* XXX: allocate ? */
52 RTPDemuxContext *cur_rtp;
55 typedef struct RTSPStream {
56 URLContext *rtp_handle; /* RTP stream handle */
57 RTPDemuxContext *rtp_ctx; /* RTP parse context */
59 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
60 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
61 char control_url[1024]; /* url for this stream (from SDP) */
63 int sdp_port; /* port (from SDP content - not used in RTSP) */
64 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
65 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
66 int sdp_payload_type; /* payload type - only used in SDP */
67 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
69 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
70 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
73 static int rtsp_read_play(AVFormatContext *s);
75 /* XXX: currently, the only way to change the protocols consists in
76 changing this variable */
78 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
80 static int rtsp_probe(AVProbeData *p)
82 if (strstart(p->filename, "rtsp:", NULL))
83 return AVPROBE_SCORE_MAX;
87 static int redir_isspace(int c)
89 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
92 static void skip_spaces(const char **pp)
96 while (redir_isspace(*p))
101 static void get_word_sep(char *buf, int buf_size, const char *sep,
112 while (!strchr(sep, *p) && *p != '\0') {
113 if ((q - buf) < buf_size - 1)
122 static void get_word(char *buf, int buf_size, const char **pp)
130 while (!redir_isspace(*p) && *p != '\0') {
131 if ((q - buf) < buf_size - 1)
140 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
142 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
149 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
150 see if we can handle this kind of payload */
151 get_word_sep(buf, sizeof(buf), "/", &p);
152 if (payload_type >= RTP_PT_PRIVATE) {
153 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
155 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
156 codec->codec_id = handler->codec_id;
157 rtsp_st->dynamic_handler= handler;
159 rtsp_st->dynamic_protocol_context= handler->open();
163 handler= handler->next;
166 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
167 /* search into AVRtpPayloadTypes[] */
168 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
169 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
170 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
175 c = avcodec_find_decoder(codec->codec_id);
179 c_name = (char *)NULL;
182 get_word_sep(buf, sizeof(buf), "/", &p);
184 switch (codec->codec_type) {
185 case CODEC_TYPE_AUDIO:
186 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
187 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
188 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
190 codec->sample_rate = i;
191 get_word_sep(buf, sizeof(buf), "/", &p);
195 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
196 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
198 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
199 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
201 case CODEC_TYPE_VIDEO:
202 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
213 /* return the length and optionnaly the data */
214 static int hex_to_data(uint8_t *data, const char *p)
224 c = toupper((unsigned char)*p++);
225 if (c >= '0' && c <= '9')
227 else if (c >= 'A' && c <= 'F')
242 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
244 switch (codec->codec_id) {
247 if (!strcmp(attr, "config")) {
248 /* decode the hexa encoded parameter */
249 int len = hex_to_data(NULL, value);
250 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
251 if (!codec->extradata)
253 codec->extradata_size = len;
254 hex_to_data(codec->extradata, value);
263 typedef struct attrname_map
270 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
271 #define ATTR_NAME_TYPE_INT 0
272 #define ATTR_NAME_TYPE_STR 1
273 static attrname_map_t attr_names[]=
275 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
276 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
277 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
278 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
279 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
280 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
284 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
285 * because it is used in rtp_h264.c, which is forthcoming.
287 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
292 get_word_sep(attr, attr_size, "=", p);
295 get_word_sep(value, value_size, ";", p);
303 /* parse a SDP line and save stream attributes */
304 static void sdp_parse_fmtp(AVStream *st, const char *p)
310 RTSPStream *rtsp_st = st->priv_data;
311 AVCodecContext *codec = st->codec;
312 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
314 /* loop on each attribute */
315 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
317 /* grab the codec extra_data from the config parameter of the fmtp line */
318 sdp_parse_fmtp_config(codec, attr, value);
319 /* Looking for a known attribute */
320 for (i = 0; attr_names[i].str; ++i) {
321 if (!strcasecmp(attr, attr_names[i].str)) {
322 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
323 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
324 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
325 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
331 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
333 * Used for seeking in the rtp stream.
335 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
340 if (!stristart(p, "npt=", &p))
343 *start = AV_NOPTS_VALUE;
344 *end = AV_NOPTS_VALUE;
346 get_word_sep(buf, sizeof(buf), "-", &p);
347 *start = parse_date(buf, 1);
350 get_word_sep(buf, sizeof(buf), "-", &p);
351 *end = parse_date(buf, 1);
353 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
354 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
357 typedef struct SDPParseState {
359 struct in_addr default_ip;
363 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
364 int letter, const char *buf)
366 RTSPState *rt = s->priv_data;
367 char buf1[64], st_type[64];
369 int codec_type, payload_type, i;
372 struct in_addr sdp_ip;
376 printf("sdp: %c='%s'\n", letter, buf);
382 get_word(buf1, sizeof(buf1), &p);
383 if (strcmp(buf1, "IN") != 0)
385 get_word(buf1, sizeof(buf1), &p);
386 if (strcmp(buf1, "IP4") != 0)
388 get_word_sep(buf1, sizeof(buf1), "/", &p);
389 if (inet_aton(buf1, &sdp_ip) == 0)
394 get_word_sep(buf1, sizeof(buf1), "/", &p);
397 if (s->nb_streams == 0) {
398 s1->default_ip = sdp_ip;
399 s1->default_ttl = ttl;
401 st = s->streams[s->nb_streams - 1];
402 rtsp_st = st->priv_data;
403 rtsp_st->sdp_ip = sdp_ip;
404 rtsp_st->sdp_ttl = ttl;
408 pstrcpy(s->title, sizeof(s->title), p);
411 if (s->nb_streams == 0) {
412 pstrcpy(s->comment, sizeof(s->comment), p);
418 get_word(st_type, sizeof(st_type), &p);
419 if (!strcmp(st_type, "audio")) {
420 codec_type = CODEC_TYPE_AUDIO;
421 } else if (!strcmp(st_type, "video")) {
422 codec_type = CODEC_TYPE_VIDEO;
426 rtsp_st = av_mallocz(sizeof(RTSPStream));
429 rtsp_st->stream_index = -1;
430 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
432 rtsp_st->sdp_ip = s1->default_ip;
433 rtsp_st->sdp_ttl = s1->default_ttl;
435 get_word(buf1, sizeof(buf1), &p); /* port */
436 rtsp_st->sdp_port = atoi(buf1);
438 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
440 /* XXX: handle list of formats */
441 get_word(buf1, sizeof(buf1), &p); /* format list */
442 rtsp_st->sdp_payload_type = atoi(buf1);
444 if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
445 /* no corresponding stream */
447 st = av_new_stream(s, 0);
450 st->priv_data = rtsp_st;
451 rtsp_st->stream_index = st->index;
452 st->codec->codec_type = codec_type;
453 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
454 /* if standard payload type, we can find the codec right now */
455 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
458 /* put a default control url */
459 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
462 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
464 /* get the control url */
465 st = s->streams[s->nb_streams - 1];
466 rtsp_st = st->priv_data;
468 /* XXX: may need to add full url resolution */
469 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
470 if (proto[0] == '\0') {
471 /* relative control URL */
472 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
473 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
475 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
477 } else if (strstart(p, "rtpmap:", &p)) {
478 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
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 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
488 } else if (strstart(p, "fmtp:", &p)) {
489 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
490 get_word(buf1, sizeof(buf1), &p);
491 payload_type = atoi(buf1);
492 for(i = 0; i < s->nb_streams;i++) {
494 rtsp_st = st->priv_data;
495 if (rtsp_st->sdp_payload_type == payload_type) {
496 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
497 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
498 sdp_parse_fmtp(st, p);
501 sdp_parse_fmtp(st, p);
505 } else if(strstart(p, "framesize:", &p)) {
506 // let dynamic protocol handlers have a stab at the line.
507 get_word(buf1, sizeof(buf1), &p);
508 payload_type = atoi(buf1);
509 for(i = 0; i < s->nb_streams;i++) {
511 rtsp_st = st->priv_data;
512 if (rtsp_st->sdp_payload_type == payload_type) {
513 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
514 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
518 } else if(strstart(p, "range:", &p)) {
521 // this is so that seeking on a streamed file can work.
522 rtsp_parse_range_npt(p, &start, &end);
523 s->start_time= start;
524 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
530 static int sdp_parse(AVFormatContext *s, const char *content)
535 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
537 memset(s1, 0, sizeof(SDPParseState));
548 /* get the content */
550 while (*p != '\n' && *p != '\r' && *p != '\0') {
551 if ((q - buf) < sizeof(buf) - 1)
556 sdp_parse_line(s, s1, letter, buf);
558 while (*p != '\n' && *p != '\0')
566 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
573 v = strtol(p, (char **)&p, 10);
577 v = strtol(p, (char **)&p, 10);
586 /* XXX: only one transport specification is parsed */
587 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
589 char transport_protocol[16];
591 char lower_transport[16];
593 RTSPTransportField *th;
596 reply->nb_transports = 0;
603 th = &reply->transports[reply->nb_transports];
605 get_word_sep(transport_protocol, sizeof(transport_protocol),
609 get_word_sep(profile, sizeof(profile), "/;,", &p);
610 lower_transport[0] = '\0';
613 get_word_sep(lower_transport, sizeof(lower_transport),
616 if (!strcasecmp(lower_transport, "TCP"))
617 th->protocol = RTSP_PROTOCOL_RTP_TCP;
619 th->protocol = RTSP_PROTOCOL_RTP_UDP;
623 /* get each parameter */
624 while (*p != '\0' && *p != ',') {
625 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
626 if (!strcmp(parameter, "port")) {
629 rtsp_parse_range(&th->port_min, &th->port_max, &p);
631 } else if (!strcmp(parameter, "client_port")) {
634 rtsp_parse_range(&th->client_port_min,
635 &th->client_port_max, &p);
637 } else if (!strcmp(parameter, "server_port")) {
640 rtsp_parse_range(&th->server_port_min,
641 &th->server_port_max, &p);
643 } else if (!strcmp(parameter, "interleaved")) {
646 rtsp_parse_range(&th->interleaved_min,
647 &th->interleaved_max, &p);
649 } else if (!strcmp(parameter, "multicast")) {
650 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
651 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
652 } else if (!strcmp(parameter, "ttl")) {
655 th->ttl = strtol(p, (char **)&p, 10);
657 } else if (!strcmp(parameter, "destination")) {
658 struct in_addr ipaddr;
662 get_word_sep(buf, sizeof(buf), ";,", &p);
663 if (inet_aton(buf, &ipaddr))
664 th->destination = ntohl(ipaddr.s_addr);
667 while (*p != ';' && *p != '\0' && *p != ',')
675 reply->nb_transports++;
679 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
683 /* NOTE: we do case independent match for broken servers */
685 if (stristart(p, "Session:", &p)) {
686 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
687 } else if (stristart(p, "Content-Length:", &p)) {
688 reply->content_length = strtol(p, NULL, 10);
689 } else if (stristart(p, "Transport:", &p)) {
690 rtsp_parse_transport(reply, p);
691 } else if (stristart(p, "CSeq:", &p)) {
692 reply->seq = strtol(p, NULL, 10);
693 } else if (stristart(p, "Range:", &p)) {
694 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
698 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
704 ret = url_read(h, buf+len, size-len);
712 /* skip a RTP/TCP interleaved packet */
713 static void rtsp_skip_packet(AVFormatContext *s)
715 RTSPState *rt = s->priv_data;
719 ret = url_readbuf(rt->rtsp_hd, buf, 3);
722 len = (buf[1] << 8) | buf[2];
724 printf("skipping RTP packet len=%d\n", len);
729 if (len1 > sizeof(buf))
731 ret = url_readbuf(rt->rtsp_hd, buf, len1);
738 static void rtsp_send_cmd(AVFormatContext *s,
739 const char *cmd, RTSPHeader *reply,
740 unsigned char **content_ptr)
742 RTSPState *rt = s->priv_data;
743 char buf[4096], buf1[1024], *q;
746 int content_length, line_count;
747 unsigned char *content = NULL;
749 memset(reply, 0, sizeof(RTSPHeader));
752 pstrcpy(buf, sizeof(buf), cmd);
753 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
754 pstrcat(buf, sizeof(buf), buf1);
755 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
756 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
757 pstrcat(buf, sizeof(buf), buf1);
759 pstrcat(buf, sizeof(buf), "\r\n");
761 printf("Sending:\n%s--\n", buf);
763 url_write(rt->rtsp_hd, buf, strlen(buf));
765 /* parse reply (XXX: use buffers) */
767 rt->last_reply[0] = '\0';
771 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
776 /* XXX: only parse it if first char on line ? */
778 } else if (ch != '\r') {
779 if ((q - buf) < sizeof(buf) - 1)
785 printf("line='%s'\n", buf);
787 /* test if last line */
791 if (line_count == 0) {
793 get_word(buf1, sizeof(buf1), &p);
794 get_word(buf1, sizeof(buf1), &p);
795 reply->status_code = atoi(buf1);
797 rtsp_parse_line(reply, p);
798 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
799 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
804 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
805 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
807 content_length = reply->content_length;
808 if (content_length > 0) {
809 /* leave some room for a trailing '\0' (useful for simple parsing) */
810 content = av_malloc(content_length + 1);
811 (void)url_readbuf(rt->rtsp_hd, content, content_length);
812 content[content_length] = '\0';
815 *content_ptr = content;
819 /* close and free RTSP streams */
820 static void rtsp_close_streams(RTSPState *rt)
825 for(i=0;i<rt->nb_rtsp_streams;i++) {
826 rtsp_st = rt->rtsp_streams[i];
828 if (rtsp_st->rtp_ctx)
829 rtp_parse_close(rtsp_st->rtp_ctx);
830 if (rtsp_st->rtp_handle)
831 url_close(rtsp_st->rtp_handle);
832 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
833 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
837 av_free(rt->rtsp_streams);
840 static int rtsp_read_header(AVFormatContext *s,
841 AVFormatParameters *ap)
843 RTSPState *rt = s->priv_data;
844 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
846 int port, i, j, ret, err;
847 RTSPHeader reply1, *reply = &reply1;
848 unsigned char *content = NULL;
850 int protocol_mask = 0;
853 /* extract hostname and port */
854 url_split(NULL, 0, NULL, 0,
855 host, sizeof(host), &port, path, sizeof(path), s->filename);
857 port = RTSP_DEFAULT_PORT;
859 /* search for options */
860 option_list = strchr(path, '?');
862 /* remove the options from the path */
865 /* move the option pointer */
866 option = option_list;
867 option_list = strchr(option_list, '&');
869 *(option_list++) = 0;
870 /* handle the options */
871 if (strcmp(option, "udp") == 0)
872 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
873 else if (strcmp(option, "multicast") == 0)
874 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
875 else if (strcmp(option, "tcp") == 0)
876 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
881 protocol_mask = rtsp_default_protocols;
883 /* open the tcp connexion */
884 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
885 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
887 rt->rtsp_hd = rtsp_hd;
890 /* describe the stream */
891 snprintf(cmd, sizeof(cmd),
892 "DESCRIBE %s RTSP/1.0\r\n"
893 "Accept: application/sdp\r\n",
895 rtsp_send_cmd(s, cmd, reply, &content);
897 err = AVERROR_INVALIDDATA;
900 if (reply->status_code != RTSP_STATUS_OK) {
901 err = AVERROR_INVALIDDATA;
905 /* now we got the SDP description, we parse it */
906 ret = sdp_parse(s, (const char *)content);
909 err = AVERROR_INVALIDDATA;
913 /* for each stream, make the setup request */
914 /* XXX: we assume the same server is used for the control of each
917 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
918 char transport[2048];
920 rtsp_st = rt->rtsp_streams[i];
922 /* compute available transports */
926 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
929 /* first try in specified port range */
930 if (RTSP_RTP_PORT_MIN != 0) {
931 while(j <= RTSP_RTP_PORT_MAX) {
932 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
933 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
934 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
940 /* then try on any port
941 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
942 ** err = AVERROR_INVALIDDATA;
948 port = rtp_get_local_port(rtsp_st->rtp_handle);
949 if (transport[0] != '\0')
950 pstrcat(transport, sizeof(transport), ",");
951 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
952 "RTP/AVP/UDP;unicast;client_port=%d-%d",
957 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
958 if (transport[0] != '\0')
959 pstrcat(transport, sizeof(transport), ",");
960 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
964 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
965 if (transport[0] != '\0')
966 pstrcat(transport, sizeof(transport), ",");
967 snprintf(transport + strlen(transport),
968 sizeof(transport) - strlen(transport) - 1,
969 "RTP/AVP/UDP;multicast");
971 snprintf(cmd, sizeof(cmd),
972 "SETUP %s RTSP/1.0\r\n"
974 rtsp_st->control_url, transport);
975 rtsp_send_cmd(s, cmd, reply, NULL);
976 if (reply->status_code != RTSP_STATUS_OK ||
977 reply->nb_transports != 1) {
978 err = AVERROR_INVALIDDATA;
982 /* XXX: same protocol for all streams is required */
984 if (reply->transports[0].protocol != rt->protocol) {
985 err = AVERROR_INVALIDDATA;
989 rt->protocol = reply->transports[0].protocol;
992 /* close RTP connection if not choosen */
993 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
994 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
995 url_close(rtsp_st->rtp_handle);
996 rtsp_st->rtp_handle = NULL;
999 switch(reply->transports[0].protocol) {
1000 case RTSP_PROTOCOL_RTP_TCP:
1001 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1002 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1005 case RTSP_PROTOCOL_RTP_UDP:
1009 /* XXX: also use address if specified */
1010 snprintf(url, sizeof(url), "rtp://%s:%d",
1011 host, reply->transports[0].server_port_min);
1012 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1013 err = AVERROR_INVALIDDATA;
1018 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1023 ttl = reply->transports[0].ttl;
1026 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1028 reply->transports[0].server_port_min,
1030 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1031 err = AVERROR_INVALIDDATA;
1037 /* open the RTP context */
1039 if (rtsp_st->stream_index >= 0)
1040 st = s->streams[rtsp_st->stream_index];
1042 s->ctx_flags |= AVFMTCTX_NOHEADER;
1043 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1045 if (!rtsp_st->rtp_ctx) {
1046 err = AVERROR_NOMEM;
1049 if(rtsp_st->dynamic_handler) {
1050 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1051 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1056 rt->state = RTSP_STATE_IDLE;
1057 rt->seek_timestamp = 0; /* default is to start stream at position
1059 if (ap->initial_pause) {
1060 /* do not start immediately */
1062 if (rtsp_read_play(s) < 0) {
1063 err = AVERROR_INVALIDDATA;
1069 rtsp_close_streams(rt);
1071 url_close(rt->rtsp_hd);
1075 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1076 uint8_t *buf, int buf_size)
1078 RTSPState *rt = s->priv_data;
1079 int id, len, i, ret;
1080 RTSPStream *rtsp_st;
1082 #ifdef DEBUG_RTP_TCP
1083 printf("tcp_read_packet:\n");
1087 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1088 #ifdef DEBUG_RTP_TCP
1089 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1096 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1100 len = (buf[1] << 8) | buf[2];
1101 #ifdef DEBUG_RTP_TCP
1102 printf("id=%d len=%d\n", id, len);
1104 if (len > buf_size || len < 12)
1107 ret = url_readbuf(rt->rtsp_hd, buf, len);
1111 /* find the matching stream */
1112 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1113 rtsp_st = rt->rtsp_streams[i];
1114 if (id >= rtsp_st->interleaved_min &&
1115 id <= rtsp_st->interleaved_max)
1120 *prtsp_st = rtsp_st;
1124 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1125 uint8_t *buf, int buf_size)
1127 RTSPState *rt = s->priv_data;
1128 RTSPStream *rtsp_st;
1130 int fd1, fd2, fd_max, n, i, ret;
1134 if (url_interrupt_cb())
1138 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1139 rtsp_st = rt->rtsp_streams[i];
1140 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1141 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1147 tv.tv_usec = 100 * 1000;
1148 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1150 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1151 rtsp_st = rt->rtsp_streams[i];
1152 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1153 if (FD_ISSET(fd1, &rfds)) {
1154 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1156 *prtsp_st = rtsp_st;
1165 static int rtsp_read_packet(AVFormatContext *s,
1168 RTSPState *rt = s->priv_data;
1169 RTSPStream *rtsp_st;
1171 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1173 /* get next frames from the same RTP packet */
1175 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1179 } else if (ret == 1) {
1186 /* read next RTP packet */
1188 switch(rt->protocol) {
1190 case RTSP_PROTOCOL_RTP_TCP:
1191 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1193 case RTSP_PROTOCOL_RTP_UDP:
1194 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1195 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1196 if (rtsp_st->rtp_ctx)
1197 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1202 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1206 /* more packets may follow, so we save the RTP context */
1207 rt->cur_rtp = rtsp_st->rtp_ctx;
1212 static int rtsp_read_play(AVFormatContext *s)
1214 RTSPState *rt = s->priv_data;
1215 RTSPHeader reply1, *reply = &reply1;
1218 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1220 if (rt->state == RTSP_STATE_PAUSED) {
1221 snprintf(cmd, sizeof(cmd),
1222 "PLAY %s RTSP/1.0\r\n",
1225 snprintf(cmd, sizeof(cmd),
1226 "PLAY %s RTSP/1.0\r\n"
1227 "Range: npt=%0.3f-\r\n",
1229 (double)rt->seek_timestamp / AV_TIME_BASE);
1231 rtsp_send_cmd(s, cmd, reply, NULL);
1232 if (reply->status_code != RTSP_STATUS_OK) {
1235 rt->state = RTSP_STATE_PLAYING;
1240 /* pause the stream */
1241 static int rtsp_read_pause(AVFormatContext *s)
1243 RTSPState *rt = s->priv_data;
1244 RTSPHeader reply1, *reply = &reply1;
1249 if (rt->state != RTSP_STATE_PLAYING)
1252 snprintf(cmd, sizeof(cmd),
1253 "PAUSE %s RTSP/1.0\r\n",
1255 rtsp_send_cmd(s, cmd, reply, NULL);
1256 if (reply->status_code != RTSP_STATUS_OK) {
1259 rt->state = RTSP_STATE_PAUSED;
1264 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1265 int64_t timestamp, int flags)
1267 RTSPState *rt = s->priv_data;
1269 rt->seek_timestamp = timestamp;
1272 case RTSP_STATE_IDLE:
1274 case RTSP_STATE_PLAYING:
1275 if (rtsp_read_play(s) != 0)
1278 case RTSP_STATE_PAUSED:
1279 rt->state = RTSP_STATE_IDLE;
1285 static int rtsp_read_close(AVFormatContext *s)
1287 RTSPState *rt = s->priv_data;
1288 RTSPHeader reply1, *reply = &reply1;
1292 /* NOTE: it is valid to flush the buffer here */
1293 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1294 url_fclose(&rt->rtsp_gb);
1297 snprintf(cmd, sizeof(cmd),
1298 "TEARDOWN %s RTSP/1.0\r\n",
1300 rtsp_send_cmd(s, cmd, reply, NULL);
1302 rtsp_close_streams(rt);
1303 url_close(rt->rtsp_hd);
1307 #ifdef CONFIG_RTSP_DEMUXER
1308 AVInputFormat rtsp_demuxer = {
1310 "RTSP input format",
1317 .flags = AVFMT_NOFILE,
1318 .read_play = rtsp_read_play,
1319 .read_pause = rtsp_read_pause,
1323 static int sdp_probe(AVProbeData *p1)
1325 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1327 /* we look for a line beginning "c=IN IP4" */
1328 while (p < p_end && *p != '\0') {
1329 if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL))
1330 return AVPROBE_SCORE_MAX / 2;
1332 while(p < p_end - 1 && *p != '\n') p++;
1341 #define SDP_MAX_SIZE 8192
1343 static int sdp_read_header(AVFormatContext *s,
1344 AVFormatParameters *ap)
1346 RTSPState *rt = s->priv_data;
1347 RTSPStream *rtsp_st;
1353 /* read the whole sdp file */
1354 /* XXX: better loading */
1355 content = av_malloc(SDP_MAX_SIZE);
1356 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1359 return AVERROR_INVALIDDATA;
1361 content[size] ='\0';
1363 sdp_parse(s, content);
1366 /* open each RTP stream */
1367 for(i=0;i<rt->nb_rtsp_streams;i++) {
1368 rtsp_st = rt->rtsp_streams[i];
1370 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1371 inet_ntoa(rtsp_st->sdp_ip),
1374 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1375 err = AVERROR_INVALIDDATA;
1378 /* open the RTP context */
1380 if (rtsp_st->stream_index >= 0)
1381 st = s->streams[rtsp_st->stream_index];
1383 s->ctx_flags |= AVFMTCTX_NOHEADER;
1384 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1385 if (!rtsp_st->rtp_ctx) {
1386 err = AVERROR_NOMEM;
1389 if(rtsp_st->dynamic_handler) {
1390 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1391 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1397 rtsp_close_streams(rt);
1401 static int sdp_read_packet(AVFormatContext *s,
1404 return rtsp_read_packet(s, pkt);
1407 static int sdp_read_close(AVFormatContext *s)
1409 RTSPState *rt = s->priv_data;
1410 rtsp_close_streams(rt);
1414 #ifdef CONFIG_SDP_DEMUXER
1415 AVInputFormat sdp_demuxer = {
1426 #ifdef CONFIG_REDIR_DEMUXER
1427 /* dummy redirector format (used directly in av_open_input_file now) */
1428 static int redir_probe(AVProbeData *pd)
1432 while (redir_isspace(*p))
1434 if (strstart(p, "http://", NULL) ||
1435 strstart(p, "rtsp://", NULL))
1436 return AVPROBE_SCORE_MAX;
1440 /* called from utils.c */
1441 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1445 AVFormatContext *ic = NULL;
1447 /* parse each URL and try to open it */
1449 while (c != URL_EOF) {
1452 if (!redir_isspace(c))
1461 if (c == URL_EOF || redir_isspace(c))
1463 if ((q - buf) < sizeof(buf) - 1)
1468 //printf("URL='%s'\n", buf);
1469 /* try to open the media file */
1470 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1480 AVInputFormat redir_demuxer = {
1482 "Redirector format",