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 #ifdef HAVE_SYS_SELECT_H
30 #include <sys/select.h>
36 #include "rtp_internal.h"
40 //#define DEBUG_RTP_TCP
42 enum RTSPClientState {
49 RTSP_SERVER_RTP, /*< Standard-compliant RTP-server */
50 RTSP_SERVER_REAL, /*< Realmedia-style server */
60 typedef struct RTSPState {
61 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
63 struct RTSPStream **rtsp_streams;
65 enum RTSPClientState state;
66 int64_t seek_timestamp;
68 /* XXX: currently we use unbuffered input */
69 // ByteIOContext rtsp_gb;
70 int seq; /* RTSP command sequence number */
72 enum RTSPTransport transport;
73 enum RTSPLowerTransport lower_transport;
74 enum RTSPServerType server_type;
75 char last_reply[2048]; /* XXX: allocate ? */
77 int need_subscription;
80 typedef struct RTSPStream {
81 URLContext *rtp_handle; /* RTP stream handle */
82 void *tx_ctx; /* RTP/RDT parse context */
84 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
85 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
86 char control_url[1024]; /* url for this stream (from SDP) */
88 int sdp_port; /* port (from SDP content - not used in RTSP) */
89 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
90 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
91 int sdp_payload_type; /* payload type - only used in SDP */
92 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
94 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
95 PayloadContext *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
98 static int rtsp_read_play(AVFormatContext *s);
100 /* XXX: currently, the only way to change the protocols consists in
101 changing this variable */
103 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
104 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
107 static int rtsp_probe(AVProbeData *p)
109 if (av_strstart(p->filename, "rtsp:", NULL))
110 return AVPROBE_SCORE_MAX;
114 static int redir_isspace(int c)
116 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
119 static void skip_spaces(const char **pp)
123 while (redir_isspace(*p))
128 static void get_word_sep(char *buf, int buf_size, const char *sep,
139 while (!strchr(sep, *p) && *p != '\0') {
140 if ((q - buf) < buf_size - 1)
149 static void get_word(char *buf, int buf_size, const char **pp)
157 while (!redir_isspace(*p) && *p != '\0') {
158 if ((q - buf) < buf_size - 1)
167 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
169 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
176 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
177 see if we can handle this kind of payload */
178 get_word_sep(buf, sizeof(buf), "/", &p);
179 if (payload_type >= RTP_PT_PRIVATE) {
180 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
182 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
183 codec->codec_id = handler->codec_id;
184 rtsp_st->dynamic_handler= handler;
186 rtsp_st->dynamic_protocol_context= handler->open();
190 handler= handler->next;
193 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
194 /* search into AVRtpPayloadTypes[] */
195 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
198 c = avcodec_find_decoder(codec->codec_id);
202 c_name = (char *)NULL;
205 get_word_sep(buf, sizeof(buf), "/", &p);
207 switch (codec->codec_type) {
208 case CODEC_TYPE_AUDIO:
209 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
210 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
211 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
213 codec->sample_rate = i;
214 get_word_sep(buf, sizeof(buf), "/", &p);
218 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
219 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
221 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
222 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
224 case CODEC_TYPE_VIDEO:
225 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
236 /* return the length and optionnaly the data */
237 static int hex_to_data(uint8_t *data, const char *p)
247 c = toupper((unsigned char)*p++);
248 if (c >= '0' && c <= '9')
250 else if (c >= 'A' && c <= 'F')
265 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
267 switch (codec->codec_id) {
270 if (!strcmp(attr, "config")) {
271 /* decode the hexa encoded parameter */
272 int len = hex_to_data(NULL, value);
273 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
274 if (!codec->extradata)
276 codec->extradata_size = len;
277 hex_to_data(codec->extradata, value);
286 typedef struct attrname_map
293 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
294 #define ATTR_NAME_TYPE_INT 0
295 #define ATTR_NAME_TYPE_STR 1
296 static const attrname_map_t attr_names[]=
298 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
299 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
300 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
301 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
302 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
303 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
307 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
308 * because it is used in rtp_h264.c, which is forthcoming.
310 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
315 get_word_sep(attr, attr_size, "=", p);
318 get_word_sep(value, value_size, ";", p);
326 /* parse a SDP line and save stream attributes */
327 static void sdp_parse_fmtp(AVStream *st, const char *p)
333 RTSPStream *rtsp_st = st->priv_data;
334 AVCodecContext *codec = st->codec;
335 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
337 /* loop on each attribute */
338 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
340 /* grab the codec extra_data from the config parameter of the fmtp line */
341 sdp_parse_fmtp_config(codec, attr, value);
342 /* Looking for a known attribute */
343 for (i = 0; attr_names[i].str; ++i) {
344 if (!strcasecmp(attr, attr_names[i].str)) {
345 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
346 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
347 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
348 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
354 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
356 * Used for seeking in the rtp stream.
358 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
363 if (!av_stristart(p, "npt=", &p))
366 *start = AV_NOPTS_VALUE;
367 *end = AV_NOPTS_VALUE;
369 get_word_sep(buf, sizeof(buf), "-", &p);
370 *start = parse_date(buf, 1);
373 get_word_sep(buf, sizeof(buf), "-", &p);
374 *end = parse_date(buf, 1);
376 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
377 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
380 typedef struct SDPParseState {
382 struct in_addr default_ip;
386 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
387 int letter, const char *buf)
389 RTSPState *rt = s->priv_data;
390 char buf1[64], st_type[64];
392 enum CodecType codec_type;
396 struct in_addr sdp_ip;
400 printf("sdp: %c='%s'\n", letter, buf);
406 get_word(buf1, sizeof(buf1), &p);
407 if (strcmp(buf1, "IN") != 0)
409 get_word(buf1, sizeof(buf1), &p);
410 if (strcmp(buf1, "IP4") != 0)
412 get_word_sep(buf1, sizeof(buf1), "/", &p);
413 if (inet_aton(buf1, &sdp_ip) == 0)
418 get_word_sep(buf1, sizeof(buf1), "/", &p);
421 if (s->nb_streams == 0) {
422 s1->default_ip = sdp_ip;
423 s1->default_ttl = ttl;
425 st = s->streams[s->nb_streams - 1];
426 rtsp_st = st->priv_data;
427 rtsp_st->sdp_ip = sdp_ip;
428 rtsp_st->sdp_ttl = ttl;
432 av_strlcpy(s->title, p, sizeof(s->title));
435 if (s->nb_streams == 0) {
436 av_strlcpy(s->comment, p, sizeof(s->comment));
442 get_word(st_type, sizeof(st_type), &p);
443 if (!strcmp(st_type, "audio")) {
444 codec_type = CODEC_TYPE_AUDIO;
445 } else if (!strcmp(st_type, "video")) {
446 codec_type = CODEC_TYPE_VIDEO;
450 rtsp_st = av_mallocz(sizeof(RTSPStream));
453 rtsp_st->stream_index = -1;
454 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
456 rtsp_st->sdp_ip = s1->default_ip;
457 rtsp_st->sdp_ttl = s1->default_ttl;
459 get_word(buf1, sizeof(buf1), &p); /* port */
460 rtsp_st->sdp_port = atoi(buf1);
462 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
464 /* XXX: handle list of formats */
465 get_word(buf1, sizeof(buf1), &p); /* format list */
466 rtsp_st->sdp_payload_type = atoi(buf1);
468 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
469 /* no corresponding stream */
471 st = av_new_stream(s, 0);
474 st->priv_data = rtsp_st;
475 rtsp_st->stream_index = st->index;
476 st->codec->codec_type = codec_type;
477 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
478 /* if standard payload type, we can find the codec right now */
479 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
482 /* put a default control url */
483 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
486 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
488 /* get the control url */
489 st = s->streams[s->nb_streams - 1];
490 rtsp_st = st->priv_data;
492 /* XXX: may need to add full url resolution */
493 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
494 if (proto[0] == '\0') {
495 /* relative control URL */
496 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
497 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
499 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
501 } else if (av_strstart(p, "rtpmap:", &p)) {
502 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
503 get_word(buf1, sizeof(buf1), &p);
504 payload_type = atoi(buf1);
505 for(i = 0; i < s->nb_streams;i++) {
507 rtsp_st = st->priv_data;
508 if (rtsp_st->sdp_payload_type == payload_type) {
509 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
512 } else if (av_strstart(p, "fmtp:", &p)) {
513 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
514 get_word(buf1, sizeof(buf1), &p);
515 payload_type = atoi(buf1);
516 for(i = 0; i < s->nb_streams;i++) {
518 rtsp_st = st->priv_data;
519 if (rtsp_st->sdp_payload_type == payload_type) {
520 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
521 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
522 sdp_parse_fmtp(st, p);
525 sdp_parse_fmtp(st, p);
529 } else if(av_strstart(p, "framesize:", &p)) {
530 // let dynamic protocol handlers have a stab at the line.
531 get_word(buf1, sizeof(buf1), &p);
532 payload_type = atoi(buf1);
533 for(i = 0; i < s->nb_streams;i++) {
535 rtsp_st = st->priv_data;
536 if (rtsp_st->sdp_payload_type == payload_type) {
537 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
538 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
542 } else if(av_strstart(p, "range:", &p)) {
545 // this is so that seeking on a streamed file can work.
546 rtsp_parse_range_npt(p, &start, &end);
547 s->start_time= start;
548 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
549 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
551 rt->transport = RTSP_TRANSPORT_RDT;
552 } else if (s->nb_streams > 0) {
553 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
554 if (rtsp_st->dynamic_handler &&
555 rtsp_st->dynamic_handler->parse_sdp_a_line)
556 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
557 rtsp_st->dynamic_protocol_context, buf);
563 static int sdp_parse(AVFormatContext *s, const char *content)
568 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
570 memset(s1, 0, sizeof(SDPParseState));
581 /* get the content */
583 while (*p != '\n' && *p != '\r' && *p != '\0') {
584 if ((q - buf) < sizeof(buf) - 1)
589 sdp_parse_line(s, s1, letter, buf);
591 while (*p != '\n' && *p != '\0')
599 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
606 v = strtol(p, (char **)&p, 10);
610 v = strtol(p, (char **)&p, 10);
619 /* XXX: only one transport specification is parsed */
620 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
622 char transport_protocol[16];
624 char lower_transport[16];
626 RTSPTransportField *th;
629 reply->nb_transports = 0;
636 th = &reply->transports[reply->nb_transports];
638 get_word_sep(transport_protocol, sizeof(transport_protocol),
642 if (!strcasecmp (transport_protocol, "rtp")) {
643 get_word_sep(profile, sizeof(profile), "/;,", &p);
644 lower_transport[0] = '\0';
645 /* rtp/avp/<protocol> */
648 get_word_sep(lower_transport, sizeof(lower_transport),
651 th->transport = RTSP_TRANSPORT_RTP;
652 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
653 !strcasecmp (transport_protocol, "x-real-rdt")) {
654 /* x-pn-tng/<protocol> */
655 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
657 th->transport = RTSP_TRANSPORT_RDT;
659 if (!strcasecmp(lower_transport, "TCP"))
660 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
662 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
666 /* get each parameter */
667 while (*p != '\0' && *p != ',') {
668 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
669 if (!strcmp(parameter, "port")) {
672 rtsp_parse_range(&th->port_min, &th->port_max, &p);
674 } else if (!strcmp(parameter, "client_port")) {
677 rtsp_parse_range(&th->client_port_min,
678 &th->client_port_max, &p);
680 } else if (!strcmp(parameter, "server_port")) {
683 rtsp_parse_range(&th->server_port_min,
684 &th->server_port_max, &p);
686 } else if (!strcmp(parameter, "interleaved")) {
689 rtsp_parse_range(&th->interleaved_min,
690 &th->interleaved_max, &p);
692 } else if (!strcmp(parameter, "multicast")) {
693 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
694 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
695 } else if (!strcmp(parameter, "ttl")) {
698 th->ttl = strtol(p, (char **)&p, 10);
700 } else if (!strcmp(parameter, "destination")) {
701 struct in_addr ipaddr;
705 get_word_sep(buf, sizeof(buf), ";,", &p);
706 if (inet_aton(buf, &ipaddr))
707 th->destination = ntohl(ipaddr.s_addr);
710 while (*p != ';' && *p != '\0' && *p != ',')
718 reply->nb_transports++;
722 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
726 /* NOTE: we do case independent match for broken servers */
728 if (av_stristart(p, "Session:", &p)) {
729 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
730 } else if (av_stristart(p, "Content-Length:", &p)) {
731 reply->content_length = strtol(p, NULL, 10);
732 } else if (av_stristart(p, "Transport:", &p)) {
733 rtsp_parse_transport(reply, p);
734 } else if (av_stristart(p, "CSeq:", &p)) {
735 reply->seq = strtol(p, NULL, 10);
736 } else if (av_stristart(p, "Range:", &p)) {
737 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
738 } else if (av_stristart(p, "RealChallenge1:", &p)) {
740 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
744 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
750 ret = url_read(h, buf+len, size-len);
758 /* skip a RTP/TCP interleaved packet */
759 static void rtsp_skip_packet(AVFormatContext *s)
761 RTSPState *rt = s->priv_data;
765 ret = url_readbuf(rt->rtsp_hd, buf, 3);
768 len = AV_RB16(buf + 1);
770 printf("skipping RTP packet len=%d\n", len);
775 if (len1 > sizeof(buf))
777 ret = url_readbuf(rt->rtsp_hd, buf, len1);
784 static void rtsp_send_cmd(AVFormatContext *s,
785 const char *cmd, RTSPHeader *reply,
786 unsigned char **content_ptr)
788 RTSPState *rt = s->priv_data;
789 char buf[4096], buf1[1024], *q;
792 int content_length, line_count;
793 unsigned char *content = NULL;
795 memset(reply, 0, sizeof(RTSPHeader));
798 av_strlcpy(buf, cmd, sizeof(buf));
799 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
800 av_strlcat(buf, buf1, sizeof(buf));
801 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
802 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
803 av_strlcat(buf, buf1, sizeof(buf));
805 av_strlcat(buf, "\r\n", sizeof(buf));
807 printf("Sending:\n%s--\n", buf);
809 url_write(rt->rtsp_hd, buf, strlen(buf));
811 /* parse reply (XXX: use buffers) */
813 rt->last_reply[0] = '\0';
817 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
822 /* XXX: only parse it if first char on line ? */
824 } else if (ch != '\r') {
825 if ((q - buf) < sizeof(buf) - 1)
831 printf("line='%s'\n", buf);
833 /* test if last line */
837 if (line_count == 0) {
839 get_word(buf1, sizeof(buf1), &p);
840 get_word(buf1, sizeof(buf1), &p);
841 reply->status_code = atoi(buf1);
843 rtsp_parse_line(reply, p);
844 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
845 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
850 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
851 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
853 content_length = reply->content_length;
854 if (content_length > 0) {
855 /* leave some room for a trailing '\0' (useful for simple parsing) */
856 content = av_malloc(content_length + 1);
857 (void)url_readbuf(rt->rtsp_hd, content, content_length);
858 content[content_length] = '\0';
861 *content_ptr = content;
867 /* close and free RTSP streams */
868 static void rtsp_close_streams(RTSPState *rt)
873 for(i=0;i<rt->nb_rtsp_streams;i++) {
874 rtsp_st = rt->rtsp_streams[i];
876 if (rtsp_st->tx_ctx) {
877 if (rt->transport == RTSP_TRANSPORT_RDT)
878 ff_rdt_parse_close(rtsp_st->tx_ctx);
880 rtp_parse_close(rtsp_st->tx_ctx);
882 if (rtsp_st->rtp_handle)
883 url_close(rtsp_st->rtp_handle);
884 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
885 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
888 av_free(rt->rtsp_streams);
892 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
894 RTSPState *rt = s->priv_data;
897 /* open the RTP context */
898 if (rtsp_st->stream_index >= 0)
899 st = s->streams[rtsp_st->stream_index];
901 s->ctx_flags |= AVFMTCTX_NOHEADER;
903 if (rt->transport == RTSP_TRANSPORT_RDT)
904 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
905 rtsp_st->dynamic_protocol_context,
906 rtsp_st->dynamic_handler);
908 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
909 rtsp_st->sdp_payload_type,
910 &rtsp_st->rtp_payload_data);
912 if (!rtsp_st->tx_ctx) {
913 return AVERROR(ENOMEM);
914 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
915 if(rtsp_st->dynamic_handler) {
916 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
917 rtsp_st->dynamic_protocol_context,
918 rtsp_st->dynamic_handler);
926 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
929 make_setup_request (AVFormatContext *s, const char *host, int port,
930 int lower_transport, const char *real_challenge)
932 RTSPState *rt = s->priv_data;
935 RTSPHeader reply1, *reply = &reply1;
937 const char *trans_pref;
939 if (rt->transport == RTSP_TRANSPORT_RDT)
940 trans_pref = "x-pn-tng";
942 trans_pref = "RTP/AVP";
944 /* for each stream, make the setup request */
945 /* XXX: we assume the same server is used for the control of each
948 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
949 char transport[2048];
951 rtsp_st = rt->rtsp_streams[i];
954 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
957 /* first try in specified port range */
958 if (RTSP_RTP_PORT_MIN != 0) {
959 while(j <= RTSP_RTP_PORT_MAX) {
960 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
961 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
962 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
968 /* then try on any port
969 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
970 ** err = AVERROR_INVALIDDATA;
976 port = rtp_get_local_port(rtsp_st->rtp_handle);
977 snprintf(transport, sizeof(transport) - 1,
978 "%s/UDP;", trans_pref);
979 if (rt->server_type != RTSP_SERVER_REAL)
980 av_strlcat(transport, "unicast;", sizeof(transport));
981 av_strlcatf(transport, sizeof(transport),
982 "client_port=%d", port);
983 if (rt->transport == RTSP_TRANSPORT_RTP)
984 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
988 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
989 snprintf(transport, sizeof(transport) - 1,
990 "%s/TCP", trans_pref);
993 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
994 snprintf(transport, sizeof(transport) - 1,
995 "%s/UDP;multicast", trans_pref);
997 if (rt->server_type == RTSP_SERVER_REAL)
998 av_strlcat(transport, ";mode=play", sizeof(transport));
999 snprintf(cmd, sizeof(cmd),
1000 "SETUP %s RTSP/1.0\r\n"
1001 "Transport: %s\r\n",
1002 rtsp_st->control_url, transport);
1003 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1004 char real_res[41], real_csum[9];
1005 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1007 av_strlcatf(cmd, sizeof(cmd),
1009 "RealChallenge2: %s, sd=%s\r\n",
1010 rt->session_id, real_res, real_csum);
1012 rtsp_send_cmd(s, cmd, reply, NULL);
1013 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1016 } else if (reply->status_code != RTSP_STATUS_OK ||
1017 reply->nb_transports != 1) {
1018 err = AVERROR_INVALIDDATA;
1022 /* XXX: same protocol for all streams is required */
1024 if (reply->transports[0].lower_transport != rt->lower_transport ||
1025 reply->transports[0].transport != rt->transport) {
1026 err = AVERROR_INVALIDDATA;
1030 rt->lower_transport = reply->transports[0].lower_transport;
1031 rt->transport = reply->transports[0].transport;
1034 /* close RTP connection if not choosen */
1035 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1036 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1037 url_close(rtsp_st->rtp_handle);
1038 rtsp_st->rtp_handle = NULL;
1041 switch(reply->transports[0].lower_transport) {
1042 case RTSP_LOWER_TRANSPORT_TCP:
1043 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1044 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1047 case RTSP_LOWER_TRANSPORT_UDP:
1051 /* XXX: also use address if specified */
1052 snprintf(url, sizeof(url), "rtp://%s:%d",
1053 host, reply->transports[0].server_port_min);
1054 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1055 err = AVERROR_INVALIDDATA;
1060 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1065 in.s_addr = htonl(reply->transports[0].destination);
1066 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1068 reply->transports[0].port_min,
1069 reply->transports[0].ttl);
1070 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1071 err = AVERROR_INVALIDDATA;
1078 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1082 if (rt->server_type == RTSP_SERVER_REAL)
1083 rt->need_subscription = 1;
1088 for (i=0; i<rt->nb_rtsp_streams; i++) {
1089 if (rt->rtsp_streams[i]->rtp_handle) {
1090 url_close(rt->rtsp_streams[i]->rtp_handle);
1091 rt->rtsp_streams[i]->rtp_handle = NULL;
1097 static int rtsp_read_header(AVFormatContext *s,
1098 AVFormatParameters *ap)
1100 RTSPState *rt = s->priv_data;
1101 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1102 URLContext *rtsp_hd;
1104 RTSPHeader reply1, *reply = &reply1;
1105 unsigned char *content = NULL;
1106 int lower_transport_mask = 0;
1107 char real_challenge[64];
1109 /* extract hostname and port */
1110 url_split(NULL, 0, NULL, 0,
1111 host, sizeof(host), &port, path, sizeof(path), s->filename);
1113 port = RTSP_DEFAULT_PORT;
1115 /* search for options */
1116 option_list = strchr(path, '?');
1118 /* remove the options from the path */
1120 while(option_list) {
1121 /* move the option pointer */
1122 option = option_list;
1123 option_list = strchr(option_list, '&');
1125 *(option_list++) = 0;
1126 /* handle the options */
1127 if (strcmp(option, "udp") == 0)
1128 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1129 else if (strcmp(option, "multicast") == 0)
1130 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1131 else if (strcmp(option, "tcp") == 0)
1132 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1136 if (!lower_transport_mask)
1137 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
1139 /* open the tcp connexion */
1140 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1141 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1142 return AVERROR(EIO);
1143 rt->rtsp_hd = rtsp_hd;
1146 /* request options supported by the server; this also detects server type */
1147 for (rt->server_type = RTSP_SERVER_RTP;;) {
1148 snprintf(cmd, sizeof(cmd),
1149 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1150 if (rt->server_type == RTSP_SERVER_REAL)
1153 * The following entries are required for proper
1154 * streaming from a Realmedia server. They are
1155 * interdependent in some way although we currently
1156 * don't quite understand how. Values were copied
1157 * from mplayer SVN r23589.
1158 * @param CompanyID is a 16-byte ID in base64
1159 * @param ClientChallenge is a 16-byte ID in hex
1161 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1162 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1163 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1164 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1166 rtsp_send_cmd(s, cmd, reply, NULL);
1167 if (reply->status_code != RTSP_STATUS_OK) {
1168 err = AVERROR_INVALIDDATA;
1172 /* detect server type if not standard-compliant RTP */
1173 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1174 rt->server_type = RTSP_SERVER_REAL;
1176 } else if (rt->server_type == RTSP_SERVER_REAL) {
1177 strcpy(real_challenge, reply->real_challenge);
1182 /* describe the stream */
1183 snprintf(cmd, sizeof(cmd),
1184 "DESCRIBE %s RTSP/1.0\r\n"
1185 "Accept: application/sdp\r\n",
1187 if (rt->server_type == RTSP_SERVER_REAL) {
1189 * The Require: attribute is needed for proper streaming from
1190 * Realmedia servers.
1193 "Require: com.real.retain-entity-for-setup\r\n",
1196 rtsp_send_cmd(s, cmd, reply, &content);
1198 err = AVERROR_INVALIDDATA;
1201 if (reply->status_code != RTSP_STATUS_OK) {
1202 err = AVERROR_INVALIDDATA;
1206 /* now we got the SDP description, we parse it */
1207 ret = sdp_parse(s, (const char *)content);
1210 err = AVERROR_INVALIDDATA;
1215 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1217 err = make_setup_request(s, host, port, lower_transport,
1218 rt->server_type == RTSP_SERVER_REAL ?
1219 real_challenge : NULL);
1222 lower_transport_mask &= ~(1 << lower_transport);
1223 if (lower_transport_mask == 0 && err == 1) {
1224 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1229 rt->state = RTSP_STATE_IDLE;
1230 rt->seek_timestamp = 0; /* default is to start stream at position
1232 if (ap->initial_pause) {
1233 /* do not start immediately */
1235 if (rtsp_read_play(s) < 0) {
1236 err = AVERROR_INVALIDDATA;
1242 rtsp_close_streams(rt);
1244 url_close(rt->rtsp_hd);
1248 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1249 uint8_t *buf, int buf_size)
1251 RTSPState *rt = s->priv_data;
1252 int id, len, i, ret;
1253 RTSPStream *rtsp_st;
1255 #ifdef DEBUG_RTP_TCP
1256 printf("tcp_read_packet:\n");
1260 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1261 #ifdef DEBUG_RTP_TCP
1262 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1269 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1273 len = AV_RB16(buf + 1);
1274 #ifdef DEBUG_RTP_TCP
1275 printf("id=%d len=%d\n", id, len);
1277 if (len > buf_size || len < 12)
1280 ret = url_readbuf(rt->rtsp_hd, buf, len);
1283 if (rt->transport == RTSP_TRANSPORT_RDT &&
1284 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1287 /* find the matching stream */
1288 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1289 rtsp_st = rt->rtsp_streams[i];
1290 if (id >= rtsp_st->interleaved_min &&
1291 id <= rtsp_st->interleaved_max)
1296 *prtsp_st = rtsp_st;
1300 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1301 uint8_t *buf, int buf_size)
1303 RTSPState *rt = s->priv_data;
1304 RTSPStream *rtsp_st;
1306 int fd1, fd2, fd_max, n, i, ret;
1310 if (url_interrupt_cb())
1311 return AVERROR(EINTR);
1314 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1315 rtsp_st = rt->rtsp_streams[i];
1316 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1317 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1323 tv.tv_usec = 100 * 1000;
1324 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1326 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1327 rtsp_st = rt->rtsp_streams[i];
1328 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1329 if (FD_ISSET(fd1, &rfds)) {
1330 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1332 *prtsp_st = rtsp_st;
1341 static int rtsp_read_packet(AVFormatContext *s,
1344 RTSPState *rt = s->priv_data;
1345 RTSPStream *rtsp_st;
1347 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1349 if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1351 RTSPHeader reply1, *reply = &reply1;
1354 snprintf(cmd, sizeof(cmd),
1355 "SET_PARAMETER %s RTSP/1.0\r\n"
1358 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1359 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
1360 ff_rdt_subscribe_rule(cmd, sizeof(cmd), i, 0);
1361 if (rt->transport == RTSP_TRANSPORT_RDT)
1362 ff_rdt_subscribe_rule2(
1363 rt->rtsp_streams[i]->tx_ctx,
1364 cmd, sizeof(cmd), i, 0);
1366 av_strlcat(cmd, "\r\n", sizeof(cmd));
1367 rtsp_send_cmd(s, cmd, reply, NULL);
1368 if (reply->status_code != RTSP_STATUS_OK)
1369 return AVERROR_INVALIDDATA;
1370 rt->need_subscription = 0;
1372 if (rt->state == RTSP_STATE_PLAYING)
1376 /* get next frames from the same RTP packet */
1378 if (rt->transport == RTSP_TRANSPORT_RDT)
1379 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
1381 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
1385 } else if (ret == 1) {
1392 /* read next RTP packet */
1394 switch(rt->lower_transport) {
1396 case RTSP_LOWER_TRANSPORT_TCP:
1397 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1399 case RTSP_LOWER_TRANSPORT_UDP:
1400 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1401 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1402 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
1403 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1408 if (rt->transport == RTSP_TRANSPORT_RDT)
1409 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1411 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1415 /* more packets may follow, so we save the RTP context */
1416 rt->cur_tx = rtsp_st->tx_ctx;
1421 static int rtsp_read_play(AVFormatContext *s)
1423 RTSPState *rt = s->priv_data;
1424 RTSPHeader reply1, *reply = &reply1;
1427 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1429 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1430 if (rt->state == RTSP_STATE_PAUSED) {
1431 snprintf(cmd, sizeof(cmd),
1432 "PLAY %s RTSP/1.0\r\n",
1435 snprintf(cmd, sizeof(cmd),
1436 "PLAY %s RTSP/1.0\r\n"
1437 "Range: npt=%0.3f-\r\n",
1439 (double)rt->seek_timestamp / AV_TIME_BASE);
1441 rtsp_send_cmd(s, cmd, reply, NULL);
1442 if (reply->status_code != RTSP_STATUS_OK) {
1446 rt->state = RTSP_STATE_PLAYING;
1450 /* pause the stream */
1451 static int rtsp_read_pause(AVFormatContext *s)
1453 RTSPState *rt = s->priv_data;
1454 RTSPHeader reply1, *reply = &reply1;
1459 if (rt->state != RTSP_STATE_PLAYING)
1461 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1462 snprintf(cmd, sizeof(cmd),
1463 "PAUSE %s RTSP/1.0\r\n",
1465 rtsp_send_cmd(s, cmd, reply, NULL);
1466 if (reply->status_code != RTSP_STATUS_OK) {
1470 rt->state = RTSP_STATE_PAUSED;
1474 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1475 int64_t timestamp, int flags)
1477 RTSPState *rt = s->priv_data;
1479 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1482 case RTSP_STATE_IDLE:
1484 case RTSP_STATE_PLAYING:
1485 if (rtsp_read_play(s) != 0)
1488 case RTSP_STATE_PAUSED:
1489 rt->state = RTSP_STATE_IDLE;
1495 static int rtsp_read_close(AVFormatContext *s)
1497 RTSPState *rt = s->priv_data;
1498 RTSPHeader reply1, *reply = &reply1;
1502 /* NOTE: it is valid to flush the buffer here */
1503 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1504 url_fclose(&rt->rtsp_gb);
1507 snprintf(cmd, sizeof(cmd),
1508 "TEARDOWN %s RTSP/1.0\r\n",
1510 rtsp_send_cmd(s, cmd, reply, NULL);
1512 rtsp_close_streams(rt);
1513 url_close(rt->rtsp_hd);
1517 #ifdef CONFIG_RTSP_DEMUXER
1518 AVInputFormat rtsp_demuxer = {
1520 NULL_IF_CONFIG_SMALL("RTSP input format"),
1527 .flags = AVFMT_NOFILE,
1528 .read_play = rtsp_read_play,
1529 .read_pause = rtsp_read_pause,
1533 static int sdp_probe(AVProbeData *p1)
1535 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1537 /* we look for a line beginning "c=IN IP4" */
1538 while (p < p_end && *p != '\0') {
1539 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1540 return AVPROBE_SCORE_MAX / 2;
1542 while(p < p_end - 1 && *p != '\n') p++;
1551 #define SDP_MAX_SIZE 8192
1553 static int sdp_read_header(AVFormatContext *s,
1554 AVFormatParameters *ap)
1556 RTSPState *rt = s->priv_data;
1557 RTSPStream *rtsp_st;
1562 /* read the whole sdp file */
1563 /* XXX: better loading */
1564 content = av_malloc(SDP_MAX_SIZE);
1565 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1568 return AVERROR_INVALIDDATA;
1570 content[size] ='\0';
1572 sdp_parse(s, content);
1575 /* open each RTP stream */
1576 for(i=0;i<rt->nb_rtsp_streams;i++) {
1577 rtsp_st = rt->rtsp_streams[i];
1579 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1580 inet_ntoa(rtsp_st->sdp_ip),
1584 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1585 err = AVERROR_INVALIDDATA;
1588 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1593 rtsp_close_streams(rt);
1597 static int sdp_read_packet(AVFormatContext *s,
1600 return rtsp_read_packet(s, pkt);
1603 static int sdp_read_close(AVFormatContext *s)
1605 RTSPState *rt = s->priv_data;
1606 rtsp_close_streams(rt);
1610 #ifdef CONFIG_SDP_DEMUXER
1611 AVInputFormat sdp_demuxer = {
1613 NULL_IF_CONFIG_SMALL("SDP"),
1622 #ifdef CONFIG_REDIR_DEMUXER
1623 /* dummy redirector format (used directly in av_open_input_file now) */
1624 static int redir_probe(AVProbeData *pd)
1628 while (redir_isspace(*p))
1630 if (av_strstart(p, "http://", NULL) ||
1631 av_strstart(p, "rtsp://", NULL))
1632 return AVPROBE_SCORE_MAX;
1636 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1640 AVFormatContext *ic = NULL;
1641 ByteIOContext *f = s->pb;
1643 /* parse each URL and try to open it */
1645 while (c != URL_EOF) {
1648 if (!redir_isspace(c))
1657 if (c == URL_EOF || redir_isspace(c))
1659 if ((q - buf) < sizeof(buf) - 1)
1664 //printf("URL='%s'\n", buf);
1665 /* try to open the media file */
1666 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1670 return AVERROR(EIO);
1678 AVInputFormat redir_demuxer = {
1680 NULL_IF_CONFIG_SMALL("Redirector format"),