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 if (!strcasecmp (transport_protocol, "rtp")) {
608 get_word_sep(profile, sizeof(profile), "/;,", &p);
609 lower_transport[0] = '\0';
610 if (*p == '/') { /* rtp/avp/<protocol> */
612 get_word_sep(lower_transport, sizeof(lower_transport),
615 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) { /* x-pn-tng/<protocol> */
616 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
619 if (!strcasecmp(lower_transport, "TCP"))
620 th->protocol = RTSP_PROTOCOL_RTP_TCP;
622 th->protocol = RTSP_PROTOCOL_RTP_UDP;
626 /* get each parameter */
627 while (*p != '\0' && *p != ',') {
628 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
629 if (!strcmp(parameter, "port")) {
632 rtsp_parse_range(&th->port_min, &th->port_max, &p);
634 } else if (!strcmp(parameter, "client_port")) {
637 rtsp_parse_range(&th->client_port_min,
638 &th->client_port_max, &p);
640 } else if (!strcmp(parameter, "server_port")) {
643 rtsp_parse_range(&th->server_port_min,
644 &th->server_port_max, &p);
646 } else if (!strcmp(parameter, "interleaved")) {
649 rtsp_parse_range(&th->interleaved_min,
650 &th->interleaved_max, &p);
652 } else if (!strcmp(parameter, "multicast")) {
653 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
654 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
655 } else if (!strcmp(parameter, "ttl")) {
658 th->ttl = strtol(p, (char **)&p, 10);
660 } else if (!strcmp(parameter, "destination")) {
661 struct in_addr ipaddr;
665 get_word_sep(buf, sizeof(buf), ";,", &p);
666 if (inet_aton(buf, &ipaddr))
667 th->destination = ntohl(ipaddr.s_addr);
670 while (*p != ';' && *p != '\0' && *p != ',')
678 reply->nb_transports++;
682 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
686 /* NOTE: we do case independent match for broken servers */
688 if (av_stristart(p, "Session:", &p)) {
689 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
690 } else if (av_stristart(p, "Content-Length:", &p)) {
691 reply->content_length = strtol(p, NULL, 10);
692 } else if (av_stristart(p, "Transport:", &p)) {
693 rtsp_parse_transport(reply, p);
694 } else if (av_stristart(p, "CSeq:", &p)) {
695 reply->seq = strtol(p, NULL, 10);
696 } else if (av_stristart(p, "Range:", &p)) {
697 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
701 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
707 ret = url_read(h, buf+len, size-len);
715 /* skip a RTP/TCP interleaved packet */
716 static void rtsp_skip_packet(AVFormatContext *s)
718 RTSPState *rt = s->priv_data;
722 ret = url_readbuf(rt->rtsp_hd, buf, 3);
725 len = AV_RB16(buf + 1);
727 printf("skipping RTP packet len=%d\n", len);
732 if (len1 > sizeof(buf))
734 ret = url_readbuf(rt->rtsp_hd, buf, len1);
741 static void rtsp_send_cmd(AVFormatContext *s,
742 const char *cmd, RTSPHeader *reply,
743 unsigned char **content_ptr)
745 RTSPState *rt = s->priv_data;
746 char buf[4096], buf1[1024], *q;
749 int content_length, line_count;
750 unsigned char *content = NULL;
752 memset(reply, 0, sizeof(RTSPHeader));
755 av_strlcpy(buf, cmd, sizeof(buf));
756 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
757 av_strlcat(buf, buf1, sizeof(buf));
758 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
759 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
760 av_strlcat(buf, buf1, sizeof(buf));
762 av_strlcat(buf, "\r\n", sizeof(buf));
764 printf("Sending:\n%s--\n", buf);
766 url_write(rt->rtsp_hd, buf, strlen(buf));
768 /* parse reply (XXX: use buffers) */
770 rt->last_reply[0] = '\0';
774 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
779 /* XXX: only parse it if first char on line ? */
781 } else if (ch != '\r') {
782 if ((q - buf) < sizeof(buf) - 1)
788 printf("line='%s'\n", buf);
790 /* test if last line */
794 if (line_count == 0) {
796 get_word(buf1, sizeof(buf1), &p);
797 get_word(buf1, sizeof(buf1), &p);
798 reply->status_code = atoi(buf1);
800 rtsp_parse_line(reply, p);
801 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
802 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
807 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
808 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
810 content_length = reply->content_length;
811 if (content_length > 0) {
812 /* leave some room for a trailing '\0' (useful for simple parsing) */
813 content = av_malloc(content_length + 1);
814 (void)url_readbuf(rt->rtsp_hd, content, content_length);
815 content[content_length] = '\0';
818 *content_ptr = content;
824 /* close and free RTSP streams */
825 static void rtsp_close_streams(RTSPState *rt)
830 for(i=0;i<rt->nb_rtsp_streams;i++) {
831 rtsp_st = rt->rtsp_streams[i];
833 if (rtsp_st->rtp_ctx)
834 rtp_parse_close(rtsp_st->rtp_ctx);
835 if (rtsp_st->rtp_handle)
836 url_close(rtsp_st->rtp_handle);
837 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
838 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
842 av_free(rt->rtsp_streams);
845 static int rtsp_read_header(AVFormatContext *s,
846 AVFormatParameters *ap)
848 RTSPState *rt = s->priv_data;
849 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
851 int port, i, j, ret, err;
852 RTSPHeader reply1, *reply = &reply1;
853 unsigned char *content = NULL;
855 int protocol_mask = 0;
858 /* extract hostname and port */
859 url_split(NULL, 0, NULL, 0,
860 host, sizeof(host), &port, path, sizeof(path), s->filename);
862 port = RTSP_DEFAULT_PORT;
864 /* search for options */
865 option_list = strchr(path, '?');
867 /* remove the options from the path */
870 /* move the option pointer */
871 option = option_list;
872 option_list = strchr(option_list, '&');
874 *(option_list++) = 0;
875 /* handle the options */
876 if (strcmp(option, "udp") == 0)
877 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
878 else if (strcmp(option, "multicast") == 0)
879 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
880 else if (strcmp(option, "tcp") == 0)
881 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
886 protocol_mask = rtsp_default_protocols;
888 /* open the tcp connexion */
889 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
890 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
892 rt->rtsp_hd = rtsp_hd;
895 /* describe the stream */
896 snprintf(cmd, sizeof(cmd),
897 "DESCRIBE %s RTSP/1.0\r\n"
898 "Accept: application/sdp\r\n",
900 rtsp_send_cmd(s, cmd, reply, &content);
902 err = AVERROR_INVALIDDATA;
905 if (reply->status_code != RTSP_STATUS_OK) {
906 err = AVERROR_INVALIDDATA;
910 /* now we got the SDP description, we parse it */
911 ret = sdp_parse(s, (const char *)content);
914 err = AVERROR_INVALIDDATA;
918 /* for each stream, make the setup request */
919 /* XXX: we assume the same server is used for the control of each
922 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
923 char transport[2048];
925 rtsp_st = rt->rtsp_streams[i];
927 /* compute available transports */
931 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
934 /* first try in specified port range */
935 if (RTSP_RTP_PORT_MIN != 0) {
936 while(j <= RTSP_RTP_PORT_MAX) {
937 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
938 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
939 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
945 /* then try on any port
946 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
947 ** err = AVERROR_INVALIDDATA;
953 port = rtp_get_local_port(rtsp_st->rtp_handle);
954 if (transport[0] != '\0')
955 av_strlcat(transport, ",", sizeof(transport));
956 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
957 "RTP/AVP/UDP;unicast;client_port=%d-%d",
962 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
963 if (transport[0] != '\0')
964 av_strlcat(transport, ",", sizeof(transport));
965 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
969 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
970 if (transport[0] != '\0')
971 av_strlcat(transport, ",", sizeof(transport));
972 snprintf(transport + strlen(transport),
973 sizeof(transport) - strlen(transport) - 1,
974 "RTP/AVP/UDP;multicast");
976 snprintf(cmd, sizeof(cmd),
977 "SETUP %s RTSP/1.0\r\n"
979 rtsp_st->control_url, transport);
980 rtsp_send_cmd(s, cmd, reply, NULL);
981 if (reply->status_code != RTSP_STATUS_OK ||
982 reply->nb_transports != 1) {
983 err = AVERROR_INVALIDDATA;
987 /* XXX: same protocol for all streams is required */
989 if (reply->transports[0].protocol != rt->protocol) {
990 err = AVERROR_INVALIDDATA;
994 rt->protocol = reply->transports[0].protocol;
997 /* close RTP connection if not choosen */
998 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
999 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
1000 url_close(rtsp_st->rtp_handle);
1001 rtsp_st->rtp_handle = NULL;
1004 switch(reply->transports[0].protocol) {
1005 case RTSP_PROTOCOL_RTP_TCP:
1006 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1007 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1010 case RTSP_PROTOCOL_RTP_UDP:
1014 /* XXX: also use address if specified */
1015 snprintf(url, sizeof(url), "rtp://%s:%d",
1016 host, reply->transports[0].server_port_min);
1017 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1018 err = AVERROR_INVALIDDATA;
1023 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1028 in.s_addr = htonl(reply->transports[0].destination);
1029 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1031 reply->transports[0].port_min,
1032 reply->transports[0].ttl);
1033 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1034 err = AVERROR_INVALIDDATA;
1040 /* open the RTP context */
1042 if (rtsp_st->stream_index >= 0)
1043 st = s->streams[rtsp_st->stream_index];
1045 s->ctx_flags |= AVFMTCTX_NOHEADER;
1046 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1048 if (!rtsp_st->rtp_ctx) {
1049 err = AVERROR(ENOMEM);
1052 if(rtsp_st->dynamic_handler) {
1053 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1054 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1059 rt->state = RTSP_STATE_IDLE;
1060 rt->seek_timestamp = 0; /* default is to start stream at position
1062 if (ap->initial_pause) {
1063 /* do not start immediately */
1065 if (rtsp_read_play(s) < 0) {
1066 err = AVERROR_INVALIDDATA;
1072 rtsp_close_streams(rt);
1074 url_close(rt->rtsp_hd);
1078 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1079 uint8_t *buf, int buf_size)
1081 RTSPState *rt = s->priv_data;
1082 int id, len, i, ret;
1083 RTSPStream *rtsp_st;
1085 #ifdef DEBUG_RTP_TCP
1086 printf("tcp_read_packet:\n");
1090 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1091 #ifdef DEBUG_RTP_TCP
1092 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1099 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1103 len = AV_RB16(buf + 1);
1104 #ifdef DEBUG_RTP_TCP
1105 printf("id=%d len=%d\n", id, len);
1107 if (len > buf_size || len < 12)
1110 ret = url_readbuf(rt->rtsp_hd, buf, len);
1114 /* find the matching stream */
1115 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1116 rtsp_st = rt->rtsp_streams[i];
1117 if (id >= rtsp_st->interleaved_min &&
1118 id <= rtsp_st->interleaved_max)
1123 *prtsp_st = rtsp_st;
1127 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1128 uint8_t *buf, int buf_size)
1130 RTSPState *rt = s->priv_data;
1131 RTSPStream *rtsp_st;
1133 int fd1, fd2, fd_max, n, i, ret;
1137 if (url_interrupt_cb())
1138 return AVERROR(EINTR);
1141 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1142 rtsp_st = rt->rtsp_streams[i];
1143 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1144 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1150 tv.tv_usec = 100 * 1000;
1151 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1153 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1154 rtsp_st = rt->rtsp_streams[i];
1155 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1156 if (FD_ISSET(fd1, &rfds)) {
1157 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1159 *prtsp_st = rtsp_st;
1168 static int rtsp_read_packet(AVFormatContext *s,
1171 RTSPState *rt = s->priv_data;
1172 RTSPStream *rtsp_st;
1174 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1176 /* get next frames from the same RTP packet */
1178 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1182 } else if (ret == 1) {
1189 /* read next RTP packet */
1191 switch(rt->protocol) {
1193 case RTSP_PROTOCOL_RTP_TCP:
1194 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1196 case RTSP_PROTOCOL_RTP_UDP:
1197 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1198 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1199 if (len >=0 && rtsp_st->rtp_ctx)
1200 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1205 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1209 /* more packets may follow, so we save the RTP context */
1210 rt->cur_rtp = rtsp_st->rtp_ctx;
1215 static int rtsp_read_play(AVFormatContext *s)
1217 RTSPState *rt = s->priv_data;
1218 RTSPHeader reply1, *reply = &reply1;
1221 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1223 if (rt->state == RTSP_STATE_PAUSED) {
1224 snprintf(cmd, sizeof(cmd),
1225 "PLAY %s RTSP/1.0\r\n",
1228 snprintf(cmd, sizeof(cmd),
1229 "PLAY %s RTSP/1.0\r\n"
1230 "Range: npt=%0.3f-\r\n",
1232 (double)rt->seek_timestamp / AV_TIME_BASE);
1234 rtsp_send_cmd(s, cmd, reply, NULL);
1235 if (reply->status_code != RTSP_STATUS_OK) {
1238 rt->state = RTSP_STATE_PLAYING;
1243 /* pause the stream */
1244 static int rtsp_read_pause(AVFormatContext *s)
1246 RTSPState *rt = s->priv_data;
1247 RTSPHeader reply1, *reply = &reply1;
1252 if (rt->state != RTSP_STATE_PLAYING)
1255 snprintf(cmd, sizeof(cmd),
1256 "PAUSE %s RTSP/1.0\r\n",
1258 rtsp_send_cmd(s, cmd, reply, NULL);
1259 if (reply->status_code != RTSP_STATUS_OK) {
1262 rt->state = RTSP_STATE_PAUSED;
1267 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1268 int64_t timestamp, int flags)
1270 RTSPState *rt = s->priv_data;
1272 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1275 case RTSP_STATE_IDLE:
1277 case RTSP_STATE_PLAYING:
1278 if (rtsp_read_play(s) != 0)
1281 case RTSP_STATE_PAUSED:
1282 rt->state = RTSP_STATE_IDLE;
1288 static int rtsp_read_close(AVFormatContext *s)
1290 RTSPState *rt = s->priv_data;
1291 RTSPHeader reply1, *reply = &reply1;
1295 /* NOTE: it is valid to flush the buffer here */
1296 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1297 url_fclose(&rt->rtsp_gb);
1300 snprintf(cmd, sizeof(cmd),
1301 "TEARDOWN %s RTSP/1.0\r\n",
1303 rtsp_send_cmd(s, cmd, reply, NULL);
1305 rtsp_close_streams(rt);
1306 url_close(rt->rtsp_hd);
1310 #ifdef CONFIG_RTSP_DEMUXER
1311 AVInputFormat rtsp_demuxer = {
1313 "RTSP input format",
1320 .flags = AVFMT_NOFILE,
1321 .read_play = rtsp_read_play,
1322 .read_pause = rtsp_read_pause,
1326 static int sdp_probe(AVProbeData *p1)
1328 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1330 /* we look for a line beginning "c=IN IP4" */
1331 while (p < p_end && *p != '\0') {
1332 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1333 return AVPROBE_SCORE_MAX / 2;
1335 while(p < p_end - 1 && *p != '\n') p++;
1344 #define SDP_MAX_SIZE 8192
1346 static int sdp_read_header(AVFormatContext *s,
1347 AVFormatParameters *ap)
1349 RTSPState *rt = s->priv_data;
1350 RTSPStream *rtsp_st;
1356 /* read the whole sdp file */
1357 /* XXX: better loading */
1358 content = av_malloc(SDP_MAX_SIZE);
1359 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1362 return AVERROR_INVALIDDATA;
1364 content[size] ='\0';
1366 sdp_parse(s, content);
1369 /* open each RTP stream */
1370 for(i=0;i<rt->nb_rtsp_streams;i++) {
1371 rtsp_st = rt->rtsp_streams[i];
1373 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1374 inet_ntoa(rtsp_st->sdp_ip),
1377 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1378 err = AVERROR_INVALIDDATA;
1381 /* open the RTP context */
1383 if (rtsp_st->stream_index >= 0)
1384 st = s->streams[rtsp_st->stream_index];
1386 s->ctx_flags |= AVFMTCTX_NOHEADER;
1387 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1388 if (!rtsp_st->rtp_ctx) {
1389 err = AVERROR(ENOMEM);
1392 if(rtsp_st->dynamic_handler) {
1393 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1394 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1400 rtsp_close_streams(rt);
1404 static int sdp_read_packet(AVFormatContext *s,
1407 return rtsp_read_packet(s, pkt);
1410 static int sdp_read_close(AVFormatContext *s)
1412 RTSPState *rt = s->priv_data;
1413 rtsp_close_streams(rt);
1417 #ifdef CONFIG_SDP_DEMUXER
1418 AVInputFormat sdp_demuxer = {
1429 #ifdef CONFIG_REDIR_DEMUXER
1430 /* dummy redirector format (used directly in av_open_input_file now) */
1431 static int redir_probe(AVProbeData *pd)
1435 while (redir_isspace(*p))
1437 if (av_strstart(p, "http://", NULL) ||
1438 av_strstart(p, "rtsp://", NULL))
1439 return AVPROBE_SCORE_MAX;
1443 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1447 AVFormatContext *ic = NULL;
1448 ByteIOContext *f = s->pb;
1450 /* parse each URL and try to open it */
1452 while (c != URL_EOF) {
1455 if (!redir_isspace(c))
1464 if (c == URL_EOF || redir_isspace(c))
1466 if ((q - buf) < sizeof(buf) - 1)
1471 //printf("URL='%s'\n", buf);
1472 /* try to open the media file */
1473 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1477 return AVERROR(EIO);
1485 AVInputFormat redir_demuxer = {
1487 "Redirector format",