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 */
29 #include "rtp_internal.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 */
71 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
72 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
75 static int rtsp_read_play(AVFormatContext *s);
77 /* XXX: currently, the only way to change the protocols consists in
78 changing this variable */
80 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
82 static int rtsp_probe(AVProbeData *p)
84 if (av_strstart(p->filename, "rtsp:", NULL))
85 return AVPROBE_SCORE_MAX;
89 static int redir_isspace(int c)
91 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
94 static void skip_spaces(const char **pp)
98 while (redir_isspace(*p))
103 static void get_word_sep(char *buf, int buf_size, const char *sep,
114 while (!strchr(sep, *p) && *p != '\0') {
115 if ((q - buf) < buf_size - 1)
124 static void get_word(char *buf, int buf_size, const char **pp)
132 while (!redir_isspace(*p) && *p != '\0') {
133 if ((q - buf) < buf_size - 1)
142 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
144 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
151 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
152 see if we can handle this kind of payload */
153 get_word_sep(buf, sizeof(buf), "/", &p);
154 if (payload_type >= RTP_PT_PRIVATE) {
155 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
157 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
158 codec->codec_id = handler->codec_id;
159 rtsp_st->dynamic_handler= handler;
161 rtsp_st->dynamic_protocol_context= handler->open();
165 handler= handler->next;
168 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
169 /* search into AVRtpPayloadTypes[] */
170 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
173 c = avcodec_find_decoder(codec->codec_id);
177 c_name = (char *)NULL;
180 get_word_sep(buf, sizeof(buf), "/", &p);
182 switch (codec->codec_type) {
183 case CODEC_TYPE_AUDIO:
184 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
185 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
186 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
188 codec->sample_rate = i;
189 get_word_sep(buf, sizeof(buf), "/", &p);
193 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
194 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
196 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
197 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
199 case CODEC_TYPE_VIDEO:
200 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
211 /* return the length and optionnaly the data */
212 static int hex_to_data(uint8_t *data, const char *p)
222 c = toupper((unsigned char)*p++);
223 if (c >= '0' && c <= '9')
225 else if (c >= 'A' && c <= 'F')
240 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
242 switch (codec->codec_id) {
245 if (!strcmp(attr, "config")) {
246 /* decode the hexa encoded parameter */
247 int len = hex_to_data(NULL, value);
248 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
249 if (!codec->extradata)
251 codec->extradata_size = len;
252 hex_to_data(codec->extradata, value);
261 typedef struct attrname_map
268 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
269 #define ATTR_NAME_TYPE_INT 0
270 #define ATTR_NAME_TYPE_STR 1
271 static attrname_map_t attr_names[]=
273 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
274 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
275 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
276 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
277 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
278 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
282 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
283 * because it is used in rtp_h264.c, which is forthcoming.
285 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
290 get_word_sep(attr, attr_size, "=", p);
293 get_word_sep(value, value_size, ";", p);
301 /* parse a SDP line and save stream attributes */
302 static void sdp_parse_fmtp(AVStream *st, const char *p)
308 RTSPStream *rtsp_st = st->priv_data;
309 AVCodecContext *codec = st->codec;
310 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
312 /* loop on each attribute */
313 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
315 /* grab the codec extra_data from the config parameter of the fmtp line */
316 sdp_parse_fmtp_config(codec, attr, value);
317 /* Looking for a known attribute */
318 for (i = 0; attr_names[i].str; ++i) {
319 if (!strcasecmp(attr, attr_names[i].str)) {
320 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
321 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
322 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
323 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
329 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
331 * Used for seeking in the rtp stream.
333 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
338 if (!av_stristart(p, "npt=", &p))
341 *start = AV_NOPTS_VALUE;
342 *end = AV_NOPTS_VALUE;
344 get_word_sep(buf, sizeof(buf), "-", &p);
345 *start = parse_date(buf, 1);
348 get_word_sep(buf, sizeof(buf), "-", &p);
349 *end = parse_date(buf, 1);
351 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
352 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
355 typedef struct SDPParseState {
357 struct in_addr default_ip;
361 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
362 int letter, const char *buf)
364 RTSPState *rt = s->priv_data;
365 char buf1[64], st_type[64];
367 int codec_type, payload_type, i;
370 struct in_addr sdp_ip;
374 printf("sdp: %c='%s'\n", letter, buf);
380 get_word(buf1, sizeof(buf1), &p);
381 if (strcmp(buf1, "IN") != 0)
383 get_word(buf1, sizeof(buf1), &p);
384 if (strcmp(buf1, "IP4") != 0)
386 get_word_sep(buf1, sizeof(buf1), "/", &p);
387 if (inet_aton(buf1, &sdp_ip) == 0)
392 get_word_sep(buf1, sizeof(buf1), "/", &p);
395 if (s->nb_streams == 0) {
396 s1->default_ip = sdp_ip;
397 s1->default_ttl = ttl;
399 st = s->streams[s->nb_streams - 1];
400 rtsp_st = st->priv_data;
401 rtsp_st->sdp_ip = sdp_ip;
402 rtsp_st->sdp_ttl = ttl;
406 av_strlcpy(s->title, p, sizeof(s->title));
409 if (s->nb_streams == 0) {
410 av_strlcpy(s->comment, p, sizeof(s->comment));
416 get_word(st_type, sizeof(st_type), &p);
417 if (!strcmp(st_type, "audio")) {
418 codec_type = CODEC_TYPE_AUDIO;
419 } else if (!strcmp(st_type, "video")) {
420 codec_type = CODEC_TYPE_VIDEO;
424 rtsp_st = av_mallocz(sizeof(RTSPStream));
427 rtsp_st->stream_index = -1;
428 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
430 rtsp_st->sdp_ip = s1->default_ip;
431 rtsp_st->sdp_ttl = s1->default_ttl;
433 get_word(buf1, sizeof(buf1), &p); /* port */
434 rtsp_st->sdp_port = atoi(buf1);
436 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
438 /* XXX: handle list of formats */
439 get_word(buf1, sizeof(buf1), &p); /* format list */
440 rtsp_st->sdp_payload_type = atoi(buf1);
442 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
443 /* no corresponding stream */
445 st = av_new_stream(s, 0);
448 st->priv_data = rtsp_st;
449 rtsp_st->stream_index = st->index;
450 st->codec->codec_type = codec_type;
451 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
452 /* if standard payload type, we can find the codec right now */
453 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
456 /* put a default control url */
457 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
460 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
462 /* get the control url */
463 st = s->streams[s->nb_streams - 1];
464 rtsp_st = st->priv_data;
466 /* XXX: may need to add full url resolution */
467 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
468 if (proto[0] == '\0') {
469 /* relative control URL */
470 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
471 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
473 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
475 } else if (av_strstart(p, "rtpmap:", &p)) {
476 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
477 get_word(buf1, sizeof(buf1), &p);
478 payload_type = atoi(buf1);
479 for(i = 0; i < s->nb_streams;i++) {
481 rtsp_st = st->priv_data;
482 if (rtsp_st->sdp_payload_type == payload_type) {
483 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
486 } else if (av_strstart(p, "fmtp:", &p)) {
487 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
488 get_word(buf1, sizeof(buf1), &p);
489 payload_type = atoi(buf1);
490 for(i = 0; i < s->nb_streams;i++) {
492 rtsp_st = st->priv_data;
493 if (rtsp_st->sdp_payload_type == payload_type) {
494 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
495 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
496 sdp_parse_fmtp(st, p);
499 sdp_parse_fmtp(st, p);
503 } else if(av_strstart(p, "framesize:", &p)) {
504 // let dynamic protocol handlers have a stab at the line.
505 get_word(buf1, sizeof(buf1), &p);
506 payload_type = atoi(buf1);
507 for(i = 0; i < s->nb_streams;i++) {
509 rtsp_st = st->priv_data;
510 if (rtsp_st->sdp_payload_type == payload_type) {
511 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
512 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
516 } else if(av_strstart(p, "range:", &p)) {
519 // this is so that seeking on a streamed file can work.
520 rtsp_parse_range_npt(p, &start, &end);
521 s->start_time= start;
522 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
528 static int sdp_parse(AVFormatContext *s, const char *content)
533 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
535 memset(s1, 0, sizeof(SDPParseState));
546 /* get the content */
548 while (*p != '\n' && *p != '\r' && *p != '\0') {
549 if ((q - buf) < sizeof(buf) - 1)
554 sdp_parse_line(s, s1, letter, buf);
556 while (*p != '\n' && *p != '\0')
564 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
571 v = strtol(p, (char **)&p, 10);
575 v = strtol(p, (char **)&p, 10);
584 /* XXX: only one transport specification is parsed */
585 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
587 char transport_protocol[16];
589 char lower_transport[16];
591 RTSPTransportField *th;
594 reply->nb_transports = 0;
601 th = &reply->transports[reply->nb_transports];
603 get_word_sep(transport_protocol, sizeof(transport_protocol),
607 get_word_sep(profile, sizeof(profile), "/;,", &p);
608 lower_transport[0] = '\0';
611 get_word_sep(lower_transport, sizeof(lower_transport),
614 if (!strcasecmp(lower_transport, "TCP"))
615 th->protocol = RTSP_PROTOCOL_RTP_TCP;
617 th->protocol = RTSP_PROTOCOL_RTP_UDP;
621 /* get each parameter */
622 while (*p != '\0' && *p != ',') {
623 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
624 if (!strcmp(parameter, "port")) {
627 rtsp_parse_range(&th->port_min, &th->port_max, &p);
629 } else if (!strcmp(parameter, "client_port")) {
632 rtsp_parse_range(&th->client_port_min,
633 &th->client_port_max, &p);
635 } else if (!strcmp(parameter, "server_port")) {
638 rtsp_parse_range(&th->server_port_min,
639 &th->server_port_max, &p);
641 } else if (!strcmp(parameter, "interleaved")) {
644 rtsp_parse_range(&th->interleaved_min,
645 &th->interleaved_max, &p);
647 } else if (!strcmp(parameter, "multicast")) {
648 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
649 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
650 } else if (!strcmp(parameter, "ttl")) {
653 th->ttl = strtol(p, (char **)&p, 10);
655 } else if (!strcmp(parameter, "destination")) {
656 struct in_addr ipaddr;
660 get_word_sep(buf, sizeof(buf), ";,", &p);
661 if (inet_aton(buf, &ipaddr))
662 th->destination = ntohl(ipaddr.s_addr);
665 while (*p != ';' && *p != '\0' && *p != ',')
673 reply->nb_transports++;
677 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
681 /* NOTE: we do case independent match for broken servers */
683 if (av_stristart(p, "Session:", &p)) {
684 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
685 } else if (av_stristart(p, "Content-Length:", &p)) {
686 reply->content_length = strtol(p, NULL, 10);
687 } else if (av_stristart(p, "Transport:", &p)) {
688 rtsp_parse_transport(reply, p);
689 } else if (av_stristart(p, "CSeq:", &p)) {
690 reply->seq = strtol(p, NULL, 10);
691 } else if (av_stristart(p, "Range:", &p)) {
692 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
696 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
702 ret = url_read(h, buf+len, size-len);
710 /* skip a RTP/TCP interleaved packet */
711 static void rtsp_skip_packet(AVFormatContext *s)
713 RTSPState *rt = s->priv_data;
717 ret = url_readbuf(rt->rtsp_hd, buf, 3);
720 len = AV_RB16(buf + 1);
722 printf("skipping RTP packet len=%d\n", len);
727 if (len1 > sizeof(buf))
729 ret = url_readbuf(rt->rtsp_hd, buf, len1);
736 static void rtsp_send_cmd(AVFormatContext *s,
737 const char *cmd, RTSPHeader *reply,
738 unsigned char **content_ptr)
740 RTSPState *rt = s->priv_data;
741 char buf[4096], buf1[1024], *q;
744 int content_length, line_count;
745 unsigned char *content = NULL;
747 memset(reply, 0, sizeof(RTSPHeader));
750 av_strlcpy(buf, cmd, sizeof(buf));
751 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
752 av_strlcat(buf, buf1, sizeof(buf));
753 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
754 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
755 av_strlcat(buf, buf1, sizeof(buf));
757 av_strlcat(buf, "\r\n", sizeof(buf));
759 printf("Sending:\n%s--\n", buf);
761 url_write(rt->rtsp_hd, buf, strlen(buf));
763 /* parse reply (XXX: use buffers) */
765 rt->last_reply[0] = '\0';
769 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
774 /* XXX: only parse it if first char on line ? */
776 } else if (ch != '\r') {
777 if ((q - buf) < sizeof(buf) - 1)
783 printf("line='%s'\n", buf);
785 /* test if last line */
789 if (line_count == 0) {
791 get_word(buf1, sizeof(buf1), &p);
792 get_word(buf1, sizeof(buf1), &p);
793 reply->status_code = atoi(buf1);
795 rtsp_parse_line(reply, p);
796 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
797 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
802 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
803 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
805 content_length = reply->content_length;
806 if (content_length > 0) {
807 /* leave some room for a trailing '\0' (useful for simple parsing) */
808 content = av_malloc(content_length + 1);
809 (void)url_readbuf(rt->rtsp_hd, content, content_length);
810 content[content_length] = '\0';
813 *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://%s?localport=%d", host, j);
933 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
934 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
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 av_strlcat(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 av_strlcat(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 av_strlcat(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 in.s_addr = htonl(reply->transports[0].destination);
1024 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1026 reply->transports[0].port_min,
1027 reply->transports[0].ttl);
1028 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1029 err = AVERROR_INVALIDDATA;
1035 /* open the RTP context */
1037 if (rtsp_st->stream_index >= 0)
1038 st = s->streams[rtsp_st->stream_index];
1040 s->ctx_flags |= AVFMTCTX_NOHEADER;
1041 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1043 if (!rtsp_st->rtp_ctx) {
1044 err = AVERROR(ENOMEM);
1047 if(rtsp_st->dynamic_handler) {
1048 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1049 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1054 rt->state = RTSP_STATE_IDLE;
1055 rt->seek_timestamp = 0; /* default is to start stream at position
1057 if (ap->initial_pause) {
1058 /* do not start immediately */
1060 if (rtsp_read_play(s) < 0) {
1061 err = AVERROR_INVALIDDATA;
1067 rtsp_close_streams(rt);
1069 url_close(rt->rtsp_hd);
1073 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1074 uint8_t *buf, int buf_size)
1076 RTSPState *rt = s->priv_data;
1077 int id, len, i, ret;
1078 RTSPStream *rtsp_st;
1080 #ifdef DEBUG_RTP_TCP
1081 printf("tcp_read_packet:\n");
1085 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1086 #ifdef DEBUG_RTP_TCP
1087 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1094 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1098 len = AV_RB16(buf + 1);
1099 #ifdef DEBUG_RTP_TCP
1100 printf("id=%d len=%d\n", id, len);
1102 if (len > buf_size || len < 12)
1105 ret = url_readbuf(rt->rtsp_hd, buf, len);
1109 /* find the matching stream */
1110 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1111 rtsp_st = rt->rtsp_streams[i];
1112 if (id >= rtsp_st->interleaved_min &&
1113 id <= rtsp_st->interleaved_max)
1118 *prtsp_st = rtsp_st;
1122 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1123 uint8_t *buf, int buf_size)
1125 RTSPState *rt = s->priv_data;
1126 RTSPStream *rtsp_st;
1128 int fd1, fd2, fd_max, n, i, ret;
1132 if (url_interrupt_cb())
1133 return AVERROR(EINTR);
1136 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1137 rtsp_st = rt->rtsp_streams[i];
1138 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1139 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1145 tv.tv_usec = 100 * 1000;
1146 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1148 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1149 rtsp_st = rt->rtsp_streams[i];
1150 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1151 if (FD_ISSET(fd1, &rfds)) {
1152 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1154 *prtsp_st = rtsp_st;
1163 static int rtsp_read_packet(AVFormatContext *s,
1166 RTSPState *rt = s->priv_data;
1167 RTSPStream *rtsp_st;
1169 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1171 /* get next frames from the same RTP packet */
1173 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1177 } else if (ret == 1) {
1184 /* read next RTP packet */
1186 switch(rt->protocol) {
1188 case RTSP_PROTOCOL_RTP_TCP:
1189 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1191 case RTSP_PROTOCOL_RTP_UDP:
1192 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1193 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1194 if (len >=0 && rtsp_st->rtp_ctx)
1195 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1200 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1204 /* more packets may follow, so we save the RTP context */
1205 rt->cur_rtp = rtsp_st->rtp_ctx;
1210 static int rtsp_read_play(AVFormatContext *s)
1212 RTSPState *rt = s->priv_data;
1213 RTSPHeader reply1, *reply = &reply1;
1216 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1218 if (rt->state == RTSP_STATE_PAUSED) {
1219 snprintf(cmd, sizeof(cmd),
1220 "PLAY %s RTSP/1.0\r\n",
1223 snprintf(cmd, sizeof(cmd),
1224 "PLAY %s RTSP/1.0\r\n"
1225 "Range: npt=%0.3f-\r\n",
1227 (double)rt->seek_timestamp / AV_TIME_BASE);
1229 rtsp_send_cmd(s, cmd, reply, NULL);
1230 if (reply->status_code != RTSP_STATUS_OK) {
1233 rt->state = RTSP_STATE_PLAYING;
1238 /* pause the stream */
1239 static int rtsp_read_pause(AVFormatContext *s)
1241 RTSPState *rt = s->priv_data;
1242 RTSPHeader reply1, *reply = &reply1;
1247 if (rt->state != RTSP_STATE_PLAYING)
1250 snprintf(cmd, sizeof(cmd),
1251 "PAUSE %s RTSP/1.0\r\n",
1253 rtsp_send_cmd(s, cmd, reply, NULL);
1254 if (reply->status_code != RTSP_STATUS_OK) {
1257 rt->state = RTSP_STATE_PAUSED;
1262 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1263 int64_t timestamp, int flags)
1265 RTSPState *rt = s->priv_data;
1267 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1270 case RTSP_STATE_IDLE:
1272 case RTSP_STATE_PLAYING:
1273 if (rtsp_read_play(s) != 0)
1276 case RTSP_STATE_PAUSED:
1277 rt->state = RTSP_STATE_IDLE;
1283 static int rtsp_read_close(AVFormatContext *s)
1285 RTSPState *rt = s->priv_data;
1286 RTSPHeader reply1, *reply = &reply1;
1290 /* NOTE: it is valid to flush the buffer here */
1291 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1292 url_fclose(&rt->rtsp_gb);
1295 snprintf(cmd, sizeof(cmd),
1296 "TEARDOWN %s RTSP/1.0\r\n",
1298 rtsp_send_cmd(s, cmd, reply, NULL);
1300 rtsp_close_streams(rt);
1301 url_close(rt->rtsp_hd);
1305 #ifdef CONFIG_RTSP_DEMUXER
1306 AVInputFormat rtsp_demuxer = {
1308 "RTSP input format",
1315 .flags = AVFMT_NOFILE,
1316 .read_play = rtsp_read_play,
1317 .read_pause = rtsp_read_pause,
1321 static int sdp_probe(AVProbeData *p1)
1323 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1325 /* we look for a line beginning "c=IN IP4" */
1326 while (p < p_end && *p != '\0') {
1327 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1328 return AVPROBE_SCORE_MAX / 2;
1330 while(p < p_end - 1 && *p != '\n') p++;
1339 #define SDP_MAX_SIZE 8192
1341 static int sdp_read_header(AVFormatContext *s,
1342 AVFormatParameters *ap)
1344 RTSPState *rt = s->priv_data;
1345 RTSPStream *rtsp_st;
1351 /* read the whole sdp file */
1352 /* XXX: better loading */
1353 content = av_malloc(SDP_MAX_SIZE);
1354 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1357 return AVERROR_INVALIDDATA;
1359 content[size] ='\0';
1361 sdp_parse(s, content);
1364 /* open each RTP stream */
1365 for(i=0;i<rt->nb_rtsp_streams;i++) {
1366 rtsp_st = rt->rtsp_streams[i];
1368 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1369 inet_ntoa(rtsp_st->sdp_ip),
1372 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1373 err = AVERROR_INVALIDDATA;
1376 /* open the RTP context */
1378 if (rtsp_st->stream_index >= 0)
1379 st = s->streams[rtsp_st->stream_index];
1381 s->ctx_flags |= AVFMTCTX_NOHEADER;
1382 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1383 if (!rtsp_st->rtp_ctx) {
1384 err = AVERROR(ENOMEM);
1387 if(rtsp_st->dynamic_handler) {
1388 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1389 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1395 rtsp_close_streams(rt);
1399 static int sdp_read_packet(AVFormatContext *s,
1402 return rtsp_read_packet(s, pkt);
1405 static int sdp_read_close(AVFormatContext *s)
1407 RTSPState *rt = s->priv_data;
1408 rtsp_close_streams(rt);
1412 #ifdef CONFIG_SDP_DEMUXER
1413 AVInputFormat sdp_demuxer = {
1424 #ifdef CONFIG_REDIR_DEMUXER
1425 /* dummy redirector format (used directly in av_open_input_file now) */
1426 static int redir_probe(AVProbeData *pd)
1430 while (redir_isspace(*p))
1432 if (av_strstart(p, "http://", NULL) ||
1433 av_strstart(p, "rtsp://", NULL))
1434 return AVPROBE_SCORE_MAX;
1438 /* called from utils.c */
1439 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1443 AVFormatContext *ic = NULL;
1445 /* parse each URL and try to open it */
1447 while (c != URL_EOF) {
1450 if (!redir_isspace(c))
1459 if (c == URL_EOF || redir_isspace(c))
1461 if ((q - buf) < sizeof(buf) - 1)
1466 //printf("URL='%s'\n", buf);
1467 /* try to open the media file */
1468 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1473 return AVERROR(EIO);
1478 AVInputFormat redir_demuxer = {
1480 "Redirector format",