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
22 /* needed by inet_aton() */
25 #include "libavutil/avstring.h"
29 #include <unistd.h> /* for select() prototype */
34 #include "rtp_internal.h"
37 //#define DEBUG_RTP_TCP
39 enum RTSPClientState {
46 RTSP_SERVER_RTP, /*< Standard-compliant RTP-server */
47 RTSP_SERVER_RDT, /*< Realmedia-style server */
51 typedef struct RTSPState {
52 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
54 struct RTSPStream **rtsp_streams;
56 enum RTSPClientState state;
57 int64_t seek_timestamp;
59 /* XXX: currently we use unbuffered input */
60 // ByteIOContext rtsp_gb;
61 int seq; /* RTSP command sequence number */
63 enum RTSPProtocol protocol;
64 enum RTSPServerType server_type;
65 char last_reply[2048]; /* XXX: allocate ? */
66 RTPDemuxContext *cur_rtp;
69 typedef struct RTSPStream {
70 URLContext *rtp_handle; /* RTP stream handle */
71 RTPDemuxContext *rtp_ctx; /* RTP parse context */
73 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
74 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
75 char control_url[1024]; /* url for this stream (from SDP) */
77 int sdp_port; /* port (from SDP content - not used in RTSP) */
78 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
79 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
80 int sdp_payload_type; /* payload type - only used in SDP */
81 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
83 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
84 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
87 static int rtsp_read_play(AVFormatContext *s);
89 /* XXX: currently, the only way to change the protocols consists in
90 changing this variable */
92 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
93 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
96 static int rtsp_probe(AVProbeData *p)
98 if (av_strstart(p->filename, "rtsp:", NULL))
99 return AVPROBE_SCORE_MAX;
103 static int redir_isspace(int c)
105 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
108 static void skip_spaces(const char **pp)
112 while (redir_isspace(*p))
117 static void get_word_sep(char *buf, int buf_size, const char *sep,
128 while (!strchr(sep, *p) && *p != '\0') {
129 if ((q - buf) < buf_size - 1)
138 static void get_word(char *buf, int buf_size, const char **pp)
146 while (!redir_isspace(*p) && *p != '\0') {
147 if ((q - buf) < buf_size - 1)
156 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
158 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
165 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
166 see if we can handle this kind of payload */
167 get_word_sep(buf, sizeof(buf), "/", &p);
168 if (payload_type >= RTP_PT_PRIVATE) {
169 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
171 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
172 codec->codec_id = handler->codec_id;
173 rtsp_st->dynamic_handler= handler;
175 rtsp_st->dynamic_protocol_context= handler->open();
179 handler= handler->next;
182 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
183 /* search into AVRtpPayloadTypes[] */
184 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
187 c = avcodec_find_decoder(codec->codec_id);
191 c_name = (char *)NULL;
194 get_word_sep(buf, sizeof(buf), "/", &p);
196 switch (codec->codec_type) {
197 case CODEC_TYPE_AUDIO:
198 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
199 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
200 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
202 codec->sample_rate = i;
203 get_word_sep(buf, sizeof(buf), "/", &p);
207 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
208 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
210 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
211 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
213 case CODEC_TYPE_VIDEO:
214 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
225 /* return the length and optionnaly the data */
226 static int hex_to_data(uint8_t *data, const char *p)
236 c = toupper((unsigned char)*p++);
237 if (c >= '0' && c <= '9')
239 else if (c >= 'A' && c <= 'F')
254 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
256 switch (codec->codec_id) {
259 if (!strcmp(attr, "config")) {
260 /* decode the hexa encoded parameter */
261 int len = hex_to_data(NULL, value);
262 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
263 if (!codec->extradata)
265 codec->extradata_size = len;
266 hex_to_data(codec->extradata, value);
275 typedef struct attrname_map
282 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
283 #define ATTR_NAME_TYPE_INT 0
284 #define ATTR_NAME_TYPE_STR 1
285 static attrname_map_t attr_names[]=
287 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
288 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
289 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
290 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
291 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
292 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
296 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
297 * because it is used in rtp_h264.c, which is forthcoming.
299 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
304 get_word_sep(attr, attr_size, "=", p);
307 get_word_sep(value, value_size, ";", p);
315 /* parse a SDP line and save stream attributes */
316 static void sdp_parse_fmtp(AVStream *st, const char *p)
322 RTSPStream *rtsp_st = st->priv_data;
323 AVCodecContext *codec = st->codec;
324 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
326 /* loop on each attribute */
327 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
329 /* grab the codec extra_data from the config parameter of the fmtp line */
330 sdp_parse_fmtp_config(codec, attr, value);
331 /* Looking for a known attribute */
332 for (i = 0; attr_names[i].str; ++i) {
333 if (!strcasecmp(attr, attr_names[i].str)) {
334 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
335 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
336 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
337 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
343 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
345 * Used for seeking in the rtp stream.
347 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
352 if (!av_stristart(p, "npt=", &p))
355 *start = AV_NOPTS_VALUE;
356 *end = AV_NOPTS_VALUE;
358 get_word_sep(buf, sizeof(buf), "-", &p);
359 *start = parse_date(buf, 1);
362 get_word_sep(buf, sizeof(buf), "-", &p);
363 *end = parse_date(buf, 1);
365 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
366 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
369 typedef struct SDPParseState {
371 struct in_addr default_ip;
375 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
376 int letter, const char *buf)
378 RTSPState *rt = s->priv_data;
379 char buf1[64], st_type[64];
381 int codec_type, payload_type, i;
384 struct in_addr sdp_ip;
388 printf("sdp: %c='%s'\n", letter, buf);
394 get_word(buf1, sizeof(buf1), &p);
395 if (strcmp(buf1, "IN") != 0)
397 get_word(buf1, sizeof(buf1), &p);
398 if (strcmp(buf1, "IP4") != 0)
400 get_word_sep(buf1, sizeof(buf1), "/", &p);
401 if (inet_aton(buf1, &sdp_ip) == 0)
406 get_word_sep(buf1, sizeof(buf1), "/", &p);
409 if (s->nb_streams == 0) {
410 s1->default_ip = sdp_ip;
411 s1->default_ttl = ttl;
413 st = s->streams[s->nb_streams - 1];
414 rtsp_st = st->priv_data;
415 rtsp_st->sdp_ip = sdp_ip;
416 rtsp_st->sdp_ttl = ttl;
420 av_strlcpy(s->title, p, sizeof(s->title));
423 if (s->nb_streams == 0) {
424 av_strlcpy(s->comment, p, sizeof(s->comment));
430 get_word(st_type, sizeof(st_type), &p);
431 if (!strcmp(st_type, "audio")) {
432 codec_type = CODEC_TYPE_AUDIO;
433 } else if (!strcmp(st_type, "video")) {
434 codec_type = CODEC_TYPE_VIDEO;
438 rtsp_st = av_mallocz(sizeof(RTSPStream));
441 rtsp_st->stream_index = -1;
442 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
444 rtsp_st->sdp_ip = s1->default_ip;
445 rtsp_st->sdp_ttl = s1->default_ttl;
447 get_word(buf1, sizeof(buf1), &p); /* port */
448 rtsp_st->sdp_port = atoi(buf1);
450 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
452 /* XXX: handle list of formats */
453 get_word(buf1, sizeof(buf1), &p); /* format list */
454 rtsp_st->sdp_payload_type = atoi(buf1);
456 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
457 /* no corresponding stream */
459 st = av_new_stream(s, 0);
462 st->priv_data = rtsp_st;
463 rtsp_st->stream_index = st->index;
464 st->codec->codec_type = codec_type;
465 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
466 /* if standard payload type, we can find the codec right now */
467 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
470 /* put a default control url */
471 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
474 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
476 /* get the control url */
477 st = s->streams[s->nb_streams - 1];
478 rtsp_st = st->priv_data;
480 /* XXX: may need to add full url resolution */
481 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
482 if (proto[0] == '\0') {
483 /* relative control URL */
484 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
485 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
487 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
489 } else if (av_strstart(p, "rtpmap:", &p)) {
490 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
491 get_word(buf1, sizeof(buf1), &p);
492 payload_type = atoi(buf1);
493 for(i = 0; i < s->nb_streams;i++) {
495 rtsp_st = st->priv_data;
496 if (rtsp_st->sdp_payload_type == payload_type) {
497 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
500 } else if (av_strstart(p, "fmtp:", &p)) {
501 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
502 get_word(buf1, sizeof(buf1), &p);
503 payload_type = atoi(buf1);
504 for(i = 0; i < s->nb_streams;i++) {
506 rtsp_st = st->priv_data;
507 if (rtsp_st->sdp_payload_type == payload_type) {
508 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
509 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
510 sdp_parse_fmtp(st, p);
513 sdp_parse_fmtp(st, p);
517 } else if(av_strstart(p, "framesize:", &p)) {
518 // let dynamic protocol handlers have a stab at the line.
519 get_word(buf1, sizeof(buf1), &p);
520 payload_type = atoi(buf1);
521 for(i = 0; i < s->nb_streams;i++) {
523 rtsp_st = st->priv_data;
524 if (rtsp_st->sdp_payload_type == payload_type) {
525 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
526 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
530 } else if(av_strstart(p, "range:", &p)) {
533 // this is so that seeking on a streamed file can work.
534 rtsp_parse_range_npt(p, &start, &end);
535 s->start_time= start;
536 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
537 } else if (s->nb_streams > 0) {
538 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
539 if (rtsp_st->dynamic_handler &&
540 rtsp_st->dynamic_handler->parse_sdp_a_line)
541 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
542 rtsp_st->dynamic_protocol_context, buf);
548 static int sdp_parse(AVFormatContext *s, const char *content)
553 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
555 memset(s1, 0, sizeof(SDPParseState));
566 /* get the content */
568 while (*p != '\n' && *p != '\r' && *p != '\0') {
569 if ((q - buf) < sizeof(buf) - 1)
574 sdp_parse_line(s, s1, letter, buf);
576 while (*p != '\n' && *p != '\0')
584 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
591 v = strtol(p, (char **)&p, 10);
595 v = strtol(p, (char **)&p, 10);
604 /* XXX: only one transport specification is parsed */
605 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
607 char transport_protocol[16];
609 char lower_transport[16];
611 RTSPTransportField *th;
614 reply->nb_transports = 0;
621 th = &reply->transports[reply->nb_transports];
623 get_word_sep(transport_protocol, sizeof(transport_protocol),
627 if (!strcasecmp (transport_protocol, "rtp")) {
628 get_word_sep(profile, sizeof(profile), "/;,", &p);
629 lower_transport[0] = '\0';
630 /* rtp/avp/<protocol> */
633 get_word_sep(lower_transport, sizeof(lower_transport),
636 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
637 /* x-pn-tng/<protocol> */
638 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
641 if (!strcasecmp(lower_transport, "TCP"))
642 th->protocol = RTSP_PROTOCOL_RTP_TCP;
644 th->protocol = RTSP_PROTOCOL_RTP_UDP;
648 /* get each parameter */
649 while (*p != '\0' && *p != ',') {
650 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
651 if (!strcmp(parameter, "port")) {
654 rtsp_parse_range(&th->port_min, &th->port_max, &p);
656 } else if (!strcmp(parameter, "client_port")) {
659 rtsp_parse_range(&th->client_port_min,
660 &th->client_port_max, &p);
662 } else if (!strcmp(parameter, "server_port")) {
665 rtsp_parse_range(&th->server_port_min,
666 &th->server_port_max, &p);
668 } else if (!strcmp(parameter, "interleaved")) {
671 rtsp_parse_range(&th->interleaved_min,
672 &th->interleaved_max, &p);
674 } else if (!strcmp(parameter, "multicast")) {
675 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
676 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
677 } else if (!strcmp(parameter, "ttl")) {
680 th->ttl = strtol(p, (char **)&p, 10);
682 } else if (!strcmp(parameter, "destination")) {
683 struct in_addr ipaddr;
687 get_word_sep(buf, sizeof(buf), ";,", &p);
688 if (inet_aton(buf, &ipaddr))
689 th->destination = ntohl(ipaddr.s_addr);
692 while (*p != ';' && *p != '\0' && *p != ',')
700 reply->nb_transports++;
704 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
708 /* NOTE: we do case independent match for broken servers */
710 if (av_stristart(p, "Session:", &p)) {
711 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
712 } else if (av_stristart(p, "Content-Length:", &p)) {
713 reply->content_length = strtol(p, NULL, 10);
714 } else if (av_stristart(p, "Transport:", &p)) {
715 rtsp_parse_transport(reply, p);
716 } else if (av_stristart(p, "CSeq:", &p)) {
717 reply->seq = strtol(p, NULL, 10);
718 } else if (av_stristart(p, "Range:", &p)) {
719 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
720 } else if (av_stristart(p, "RealChallenge1:", &p)) {
722 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
726 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
732 ret = url_read(h, buf+len, size-len);
740 /* skip a RTP/TCP interleaved packet */
741 static void rtsp_skip_packet(AVFormatContext *s)
743 RTSPState *rt = s->priv_data;
747 ret = url_readbuf(rt->rtsp_hd, buf, 3);
750 len = AV_RB16(buf + 1);
752 printf("skipping RTP packet len=%d\n", len);
757 if (len1 > sizeof(buf))
759 ret = url_readbuf(rt->rtsp_hd, buf, len1);
766 static void rtsp_send_cmd(AVFormatContext *s,
767 const char *cmd, RTSPHeader *reply,
768 unsigned char **content_ptr)
770 RTSPState *rt = s->priv_data;
771 char buf[4096], buf1[1024], *q;
774 int content_length, line_count;
775 unsigned char *content = NULL;
777 memset(reply, 0, sizeof(RTSPHeader));
780 av_strlcpy(buf, cmd, sizeof(buf));
781 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
782 av_strlcat(buf, buf1, sizeof(buf));
783 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
784 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
785 av_strlcat(buf, buf1, sizeof(buf));
787 av_strlcat(buf, "\r\n", sizeof(buf));
789 printf("Sending:\n%s--\n", buf);
791 url_write(rt->rtsp_hd, buf, strlen(buf));
793 /* parse reply (XXX: use buffers) */
795 rt->last_reply[0] = '\0';
799 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
804 /* XXX: only parse it if first char on line ? */
806 } else if (ch != '\r') {
807 if ((q - buf) < sizeof(buf) - 1)
813 printf("line='%s'\n", buf);
815 /* test if last line */
819 if (line_count == 0) {
821 get_word(buf1, sizeof(buf1), &p);
822 get_word(buf1, sizeof(buf1), &p);
823 reply->status_code = atoi(buf1);
825 rtsp_parse_line(reply, p);
826 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
827 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
832 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
833 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
835 content_length = reply->content_length;
836 if (content_length > 0) {
837 /* leave some room for a trailing '\0' (useful for simple parsing) */
838 content = av_malloc(content_length + 1);
839 (void)url_readbuf(rt->rtsp_hd, content, content_length);
840 content[content_length] = '\0';
843 *content_ptr = content;
849 /* close and free RTSP streams */
850 static void rtsp_close_streams(RTSPState *rt)
855 for(i=0;i<rt->nb_rtsp_streams;i++) {
856 rtsp_st = rt->rtsp_streams[i];
858 if (rtsp_st->rtp_ctx)
859 rtp_parse_close(rtsp_st->rtp_ctx);
860 if (rtsp_st->rtp_handle)
861 url_close(rtsp_st->rtp_handle);
862 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
863 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
866 av_free(rt->rtsp_streams);
870 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
873 make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
875 RTSPState *rt = s->priv_data;
879 RTSPHeader reply1, *reply = &reply1;
882 /* for each stream, make the setup request */
883 /* XXX: we assume the same server is used for the control of each
886 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
887 char transport[2048];
889 rtsp_st = rt->rtsp_streams[i];
891 /* compute available transports */
895 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
898 /* first try in specified port range */
899 if (RTSP_RTP_PORT_MIN != 0) {
900 while(j <= RTSP_RTP_PORT_MAX) {
901 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
902 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
903 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
909 /* then try on any port
910 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
911 ** err = AVERROR_INVALIDDATA;
917 port = rtp_get_local_port(rtsp_st->rtp_handle);
918 if (transport[0] != '\0')
919 av_strlcat(transport, ",", sizeof(transport));
920 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
921 "RTP/AVP/UDP;unicast;client_port=%d-%d",
926 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
927 if (transport[0] != '\0')
928 av_strlcat(transport, ",", sizeof(transport));
929 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
933 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
934 if (transport[0] != '\0')
935 av_strlcat(transport, ",", sizeof(transport));
936 snprintf(transport + strlen(transport),
937 sizeof(transport) - strlen(transport) - 1,
938 "RTP/AVP/UDP;multicast");
940 snprintf(cmd, sizeof(cmd),
941 "SETUP %s RTSP/1.0\r\n"
943 rtsp_st->control_url, transport);
944 rtsp_send_cmd(s, cmd, reply, NULL);
945 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
948 } else if (reply->status_code != RTSP_STATUS_OK ||
949 reply->nb_transports != 1) {
950 err = AVERROR_INVALIDDATA;
954 /* XXX: same protocol for all streams is required */
956 if (reply->transports[0].protocol != rt->protocol) {
957 err = AVERROR_INVALIDDATA;
961 rt->protocol = reply->transports[0].protocol;
964 /* close RTP connection if not choosen */
965 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
966 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
967 url_close(rtsp_st->rtp_handle);
968 rtsp_st->rtp_handle = NULL;
971 switch(reply->transports[0].protocol) {
972 case RTSP_PROTOCOL_RTP_TCP:
973 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
974 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
977 case RTSP_PROTOCOL_RTP_UDP:
981 /* XXX: also use address if specified */
982 snprintf(url, sizeof(url), "rtp://%s:%d",
983 host, reply->transports[0].server_port_min);
984 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
985 err = AVERROR_INVALIDDATA;
990 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
995 in.s_addr = htonl(reply->transports[0].destination);
996 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
998 reply->transports[0].port_min,
999 reply->transports[0].ttl);
1000 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1001 err = AVERROR_INVALIDDATA;
1007 /* open the RTP context */
1009 if (rtsp_st->stream_index >= 0)
1010 st = s->streams[rtsp_st->stream_index];
1012 s->ctx_flags |= AVFMTCTX_NOHEADER;
1013 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1015 if (!rtsp_st->rtp_ctx) {
1016 err = AVERROR(ENOMEM);
1019 if(rtsp_st->dynamic_handler) {
1020 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1021 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1029 for (i=0; i<rt->nb_rtsp_streams; i++) {
1030 if (rt->rtsp_streams[i]->rtp_handle) {
1031 url_close(rt->rtsp_streams[i]->rtp_handle);
1032 rt->rtsp_streams[i]->rtp_handle = NULL;
1038 static int rtsp_read_header(AVFormatContext *s,
1039 AVFormatParameters *ap)
1041 RTSPState *rt = s->priv_data;
1042 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1043 URLContext *rtsp_hd;
1045 RTSPHeader reply1, *reply = &reply1;
1046 unsigned char *content = NULL;
1047 int protocol_mask = 0;
1048 char real_challenge[64];
1050 /* extract hostname and port */
1051 url_split(NULL, 0, NULL, 0,
1052 host, sizeof(host), &port, path, sizeof(path), s->filename);
1054 port = RTSP_DEFAULT_PORT;
1056 /* search for options */
1057 option_list = strchr(path, '?');
1059 /* remove the options from the path */
1061 while(option_list) {
1062 /* move the option pointer */
1063 option = option_list;
1064 option_list = strchr(option_list, '&');
1066 *(option_list++) = 0;
1067 /* handle the options */
1068 if (strcmp(option, "udp") == 0)
1069 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1070 else if (strcmp(option, "multicast") == 0)
1071 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1072 else if (strcmp(option, "tcp") == 0)
1073 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1078 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
1080 /* open the tcp connexion */
1081 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1082 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1083 return AVERROR(EIO);
1084 rt->rtsp_hd = rtsp_hd;
1087 /* request options supported by the server; this also detects server type */
1088 for (rt->server_type = RTSP_SERVER_RTP;;) {
1089 snprintf(cmd, sizeof(cmd),
1090 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1091 if (rt->server_type == RTSP_SERVER_RDT)
1094 * The following entries are required for proper
1095 * streaming from a Realmedia server. They are
1096 * interdependent in some way although we currently
1097 * don't quite understand how. Values were copied
1098 * from mplayer SVN r23589.
1099 * @param CompanyID is a 16-byte ID in base64
1100 * @param ClientChallenge is a 16-byte ID in hex
1102 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1103 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1104 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1105 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1107 rtsp_send_cmd(s, cmd, reply, NULL);
1108 if (reply->status_code != RTSP_STATUS_OK) {
1109 err = AVERROR_INVALIDDATA;
1113 /* detect server type if not standard-compliant RTP */
1114 if (rt->server_type != RTSP_SERVER_RDT && reply->real_challenge[0]) {
1115 rt->server_type = RTSP_SERVER_RDT;
1117 } else if (rt->server_type == RTSP_SERVER_RDT) {
1118 strcpy(real_challenge, reply->real_challenge);
1123 /* describe the stream */
1124 snprintf(cmd, sizeof(cmd),
1125 "DESCRIBE %s RTSP/1.0\r\n"
1126 "Accept: application/sdp\r\n",
1128 rtsp_send_cmd(s, cmd, reply, &content);
1130 err = AVERROR_INVALIDDATA;
1133 if (reply->status_code != RTSP_STATUS_OK) {
1134 err = AVERROR_INVALIDDATA;
1138 /* now we got the SDP description, we parse it */
1139 ret = sdp_parse(s, (const char *)content);
1142 err = AVERROR_INVALIDDATA;
1147 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
1149 err = make_setup_request(s, host, port, protocol);
1152 protocol_mask &= ~(1 << protocol);
1153 if (protocol_mask == 0 && err == 1) {
1154 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1159 rt->state = RTSP_STATE_IDLE;
1160 rt->seek_timestamp = 0; /* default is to start stream at position
1162 if (ap->initial_pause) {
1163 /* do not start immediately */
1165 if (rtsp_read_play(s) < 0) {
1166 err = AVERROR_INVALIDDATA;
1172 rtsp_close_streams(rt);
1174 url_close(rt->rtsp_hd);
1178 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1179 uint8_t *buf, int buf_size)
1181 RTSPState *rt = s->priv_data;
1182 int id, len, i, ret;
1183 RTSPStream *rtsp_st;
1185 #ifdef DEBUG_RTP_TCP
1186 printf("tcp_read_packet:\n");
1190 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1191 #ifdef DEBUG_RTP_TCP
1192 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1199 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1203 len = AV_RB16(buf + 1);
1204 #ifdef DEBUG_RTP_TCP
1205 printf("id=%d len=%d\n", id, len);
1207 if (len > buf_size || len < 12)
1210 ret = url_readbuf(rt->rtsp_hd, buf, len);
1214 /* find the matching stream */
1215 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1216 rtsp_st = rt->rtsp_streams[i];
1217 if (id >= rtsp_st->interleaved_min &&
1218 id <= rtsp_st->interleaved_max)
1223 *prtsp_st = rtsp_st;
1227 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1228 uint8_t *buf, int buf_size)
1230 RTSPState *rt = s->priv_data;
1231 RTSPStream *rtsp_st;
1233 int fd1, fd2, fd_max, n, i, ret;
1237 if (url_interrupt_cb())
1238 return AVERROR(EINTR);
1241 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1242 rtsp_st = rt->rtsp_streams[i];
1243 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1244 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1250 tv.tv_usec = 100 * 1000;
1251 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1253 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1254 rtsp_st = rt->rtsp_streams[i];
1255 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1256 if (FD_ISSET(fd1, &rfds)) {
1257 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1259 *prtsp_st = rtsp_st;
1268 static int rtsp_read_packet(AVFormatContext *s,
1271 RTSPState *rt = s->priv_data;
1272 RTSPStream *rtsp_st;
1274 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1276 /* get next frames from the same RTP packet */
1278 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1282 } else if (ret == 1) {
1289 /* read next RTP packet */
1291 switch(rt->protocol) {
1293 case RTSP_PROTOCOL_RTP_TCP:
1294 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1296 case RTSP_PROTOCOL_RTP_UDP:
1297 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1298 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1299 if (len >=0 && rtsp_st->rtp_ctx)
1300 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1305 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1309 /* more packets may follow, so we save the RTP context */
1310 rt->cur_rtp = rtsp_st->rtp_ctx;
1315 static int rtsp_read_play(AVFormatContext *s)
1317 RTSPState *rt = s->priv_data;
1318 RTSPHeader reply1, *reply = &reply1;
1321 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1323 if (rt->state == RTSP_STATE_PAUSED) {
1324 snprintf(cmd, sizeof(cmd),
1325 "PLAY %s RTSP/1.0\r\n",
1328 snprintf(cmd, sizeof(cmd),
1329 "PLAY %s RTSP/1.0\r\n"
1330 "Range: npt=%0.3f-\r\n",
1332 (double)rt->seek_timestamp / AV_TIME_BASE);
1334 rtsp_send_cmd(s, cmd, reply, NULL);
1335 if (reply->status_code != RTSP_STATUS_OK) {
1338 rt->state = RTSP_STATE_PLAYING;
1343 /* pause the stream */
1344 static int rtsp_read_pause(AVFormatContext *s)
1346 RTSPState *rt = s->priv_data;
1347 RTSPHeader reply1, *reply = &reply1;
1352 if (rt->state != RTSP_STATE_PLAYING)
1355 snprintf(cmd, sizeof(cmd),
1356 "PAUSE %s RTSP/1.0\r\n",
1358 rtsp_send_cmd(s, cmd, reply, NULL);
1359 if (reply->status_code != RTSP_STATUS_OK) {
1362 rt->state = RTSP_STATE_PAUSED;
1367 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1368 int64_t timestamp, int flags)
1370 RTSPState *rt = s->priv_data;
1372 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1375 case RTSP_STATE_IDLE:
1377 case RTSP_STATE_PLAYING:
1378 if (rtsp_read_play(s) != 0)
1381 case RTSP_STATE_PAUSED:
1382 rt->state = RTSP_STATE_IDLE;
1388 static int rtsp_read_close(AVFormatContext *s)
1390 RTSPState *rt = s->priv_data;
1391 RTSPHeader reply1, *reply = &reply1;
1395 /* NOTE: it is valid to flush the buffer here */
1396 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1397 url_fclose(&rt->rtsp_gb);
1400 snprintf(cmd, sizeof(cmd),
1401 "TEARDOWN %s RTSP/1.0\r\n",
1403 rtsp_send_cmd(s, cmd, reply, NULL);
1405 rtsp_close_streams(rt);
1406 url_close(rt->rtsp_hd);
1410 #ifdef CONFIG_RTSP_DEMUXER
1411 AVInputFormat rtsp_demuxer = {
1413 NULL_IF_CONFIG_SMALL("RTSP input format"),
1420 .flags = AVFMT_NOFILE,
1421 .read_play = rtsp_read_play,
1422 .read_pause = rtsp_read_pause,
1426 static int sdp_probe(AVProbeData *p1)
1428 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1430 /* we look for a line beginning "c=IN IP4" */
1431 while (p < p_end && *p != '\0') {
1432 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1433 return AVPROBE_SCORE_MAX / 2;
1435 while(p < p_end - 1 && *p != '\n') p++;
1444 #define SDP_MAX_SIZE 8192
1446 static int sdp_read_header(AVFormatContext *s,
1447 AVFormatParameters *ap)
1449 RTSPState *rt = s->priv_data;
1450 RTSPStream *rtsp_st;
1456 /* read the whole sdp file */
1457 /* XXX: better loading */
1458 content = av_malloc(SDP_MAX_SIZE);
1459 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1462 return AVERROR_INVALIDDATA;
1464 content[size] ='\0';
1466 sdp_parse(s, content);
1469 /* open each RTP stream */
1470 for(i=0;i<rt->nb_rtsp_streams;i++) {
1471 rtsp_st = rt->rtsp_streams[i];
1473 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1474 inet_ntoa(rtsp_st->sdp_ip),
1478 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1479 err = AVERROR_INVALIDDATA;
1482 /* open the RTP context */
1484 if (rtsp_st->stream_index >= 0)
1485 st = s->streams[rtsp_st->stream_index];
1487 s->ctx_flags |= AVFMTCTX_NOHEADER;
1488 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1489 if (!rtsp_st->rtp_ctx) {
1490 err = AVERROR(ENOMEM);
1493 if(rtsp_st->dynamic_handler) {
1494 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1495 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1501 rtsp_close_streams(rt);
1505 static int sdp_read_packet(AVFormatContext *s,
1508 return rtsp_read_packet(s, pkt);
1511 static int sdp_read_close(AVFormatContext *s)
1513 RTSPState *rt = s->priv_data;
1514 rtsp_close_streams(rt);
1518 #ifdef CONFIG_SDP_DEMUXER
1519 AVInputFormat sdp_demuxer = {
1521 NULL_IF_CONFIG_SMALL("SDP"),
1530 #ifdef CONFIG_REDIR_DEMUXER
1531 /* dummy redirector format (used directly in av_open_input_file now) */
1532 static int redir_probe(AVProbeData *pd)
1536 while (redir_isspace(*p))
1538 if (av_strstart(p, "http://", NULL) ||
1539 av_strstart(p, "rtsp://", NULL))
1540 return AVPROBE_SCORE_MAX;
1544 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1548 AVFormatContext *ic = NULL;
1549 ByteIOContext *f = s->pb;
1551 /* parse each URL and try to open it */
1553 while (c != URL_EOF) {
1556 if (!redir_isspace(c))
1565 if (c == URL_EOF || redir_isspace(c))
1567 if ((q - buf) < sizeof(buf) - 1)
1572 //printf("URL='%s'\n", buf);
1573 /* try to open the media file */
1574 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1578 return AVERROR(EIO);
1586 AVInputFormat redir_demuxer = {
1588 NULL_IF_CONFIG_SMALL("Redirector format"),