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);
292 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
293 #define ATTR_NAME_TYPE_INT 0
294 #define ATTR_NAME_TYPE_STR 1
295 static const AttrNameMap attr_names[]=
297 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
298 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
299 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
300 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
301 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
302 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
306 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
307 * because it is used in rtp_h264.c, which is forthcoming.
309 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
314 get_word_sep(attr, attr_size, "=", p);
317 get_word_sep(value, value_size, ";", p);
325 /* parse a SDP line and save stream attributes */
326 static void sdp_parse_fmtp(AVStream *st, const char *p)
332 RTSPStream *rtsp_st = st->priv_data;
333 AVCodecContext *codec = st->codec;
334 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
336 /* loop on each attribute */
337 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
339 /* grab the codec extra_data from the config parameter of the fmtp line */
340 sdp_parse_fmtp_config(codec, attr, value);
341 /* Looking for a known attribute */
342 for (i = 0; attr_names[i].str; ++i) {
343 if (!strcasecmp(attr, attr_names[i].str)) {
344 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
345 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
346 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
347 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
353 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
355 * Used for seeking in the rtp stream.
357 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
362 if (!av_stristart(p, "npt=", &p))
365 *start = AV_NOPTS_VALUE;
366 *end = AV_NOPTS_VALUE;
368 get_word_sep(buf, sizeof(buf), "-", &p);
369 *start = parse_date(buf, 1);
372 get_word_sep(buf, sizeof(buf), "-", &p);
373 *end = parse_date(buf, 1);
375 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
376 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
379 typedef struct SDPParseState {
381 struct in_addr default_ip;
385 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
386 int letter, const char *buf)
388 RTSPState *rt = s->priv_data;
389 char buf1[64], st_type[64];
391 enum CodecType codec_type;
395 struct in_addr sdp_ip;
399 printf("sdp: %c='%s'\n", letter, buf);
405 get_word(buf1, sizeof(buf1), &p);
406 if (strcmp(buf1, "IN") != 0)
408 get_word(buf1, sizeof(buf1), &p);
409 if (strcmp(buf1, "IP4") != 0)
411 get_word_sep(buf1, sizeof(buf1), "/", &p);
412 if (inet_aton(buf1, &sdp_ip) == 0)
417 get_word_sep(buf1, sizeof(buf1), "/", &p);
420 if (s->nb_streams == 0) {
421 s1->default_ip = sdp_ip;
422 s1->default_ttl = ttl;
424 st = s->streams[s->nb_streams - 1];
425 rtsp_st = st->priv_data;
426 rtsp_st->sdp_ip = sdp_ip;
427 rtsp_st->sdp_ttl = ttl;
431 av_strlcpy(s->title, p, sizeof(s->title));
434 if (s->nb_streams == 0) {
435 av_strlcpy(s->comment, p, sizeof(s->comment));
441 get_word(st_type, sizeof(st_type), &p);
442 if (!strcmp(st_type, "audio")) {
443 codec_type = CODEC_TYPE_AUDIO;
444 } else if (!strcmp(st_type, "video")) {
445 codec_type = CODEC_TYPE_VIDEO;
449 rtsp_st = av_mallocz(sizeof(RTSPStream));
452 rtsp_st->stream_index = -1;
453 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
455 rtsp_st->sdp_ip = s1->default_ip;
456 rtsp_st->sdp_ttl = s1->default_ttl;
458 get_word(buf1, sizeof(buf1), &p); /* port */
459 rtsp_st->sdp_port = atoi(buf1);
461 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
463 /* XXX: handle list of formats */
464 get_word(buf1, sizeof(buf1), &p); /* format list */
465 rtsp_st->sdp_payload_type = atoi(buf1);
467 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
468 /* no corresponding stream */
470 st = av_new_stream(s, 0);
473 st->priv_data = rtsp_st;
474 rtsp_st->stream_index = st->index;
475 st->codec->codec_type = codec_type;
476 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
477 /* if standard payload type, we can find the codec right now */
478 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
481 /* put a default control url */
482 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
485 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
487 /* get the control url */
488 st = s->streams[s->nb_streams - 1];
489 rtsp_st = st->priv_data;
491 /* XXX: may need to add full url resolution */
492 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
493 if (proto[0] == '\0') {
494 /* relative control URL */
495 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
496 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
498 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
500 } else if (av_strstart(p, "rtpmap:", &p)) {
501 /* NOTE: rtpmap is only supported AFTER the 'm=' 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 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
511 } else if (av_strstart(p, "fmtp:", &p)) {
512 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
513 get_word(buf1, sizeof(buf1), &p);
514 payload_type = atoi(buf1);
515 for(i = 0; i < s->nb_streams;i++) {
517 rtsp_st = st->priv_data;
518 if (rtsp_st->sdp_payload_type == payload_type) {
519 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
520 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
521 sdp_parse_fmtp(st, p);
524 sdp_parse_fmtp(st, p);
528 } else if(av_strstart(p, "framesize:", &p)) {
529 // let dynamic protocol handlers have a stab at the line.
530 get_word(buf1, sizeof(buf1), &p);
531 payload_type = atoi(buf1);
532 for(i = 0; i < s->nb_streams;i++) {
534 rtsp_st = st->priv_data;
535 if (rtsp_st->sdp_payload_type == payload_type) {
536 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
537 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
541 } else if(av_strstart(p, "range:", &p)) {
544 // this is so that seeking on a streamed file can work.
545 rtsp_parse_range_npt(p, &start, &end);
546 s->start_time= start;
547 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
548 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
550 rt->transport = RTSP_TRANSPORT_RDT;
551 } else if (s->nb_streams > 0) {
552 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
553 if (rtsp_st->dynamic_handler &&
554 rtsp_st->dynamic_handler->parse_sdp_a_line)
555 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
556 rtsp_st->dynamic_protocol_context, buf);
562 static int sdp_parse(AVFormatContext *s, const char *content)
567 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
569 memset(s1, 0, sizeof(SDPParseState));
580 /* get the content */
582 while (*p != '\n' && *p != '\r' && *p != '\0') {
583 if ((q - buf) < sizeof(buf) - 1)
588 sdp_parse_line(s, s1, letter, buf);
590 while (*p != '\n' && *p != '\0')
598 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
605 v = strtol(p, (char **)&p, 10);
609 v = strtol(p, (char **)&p, 10);
618 /* XXX: only one transport specification is parsed */
619 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
621 char transport_protocol[16];
623 char lower_transport[16];
625 RTSPTransportField *th;
628 reply->nb_transports = 0;
635 th = &reply->transports[reply->nb_transports];
637 get_word_sep(transport_protocol, sizeof(transport_protocol),
641 if (!strcasecmp (transport_protocol, "rtp")) {
642 get_word_sep(profile, sizeof(profile), "/;,", &p);
643 lower_transport[0] = '\0';
644 /* rtp/avp/<protocol> */
647 get_word_sep(lower_transport, sizeof(lower_transport),
650 th->transport = RTSP_TRANSPORT_RTP;
651 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
652 !strcasecmp (transport_protocol, "x-real-rdt")) {
653 /* x-pn-tng/<protocol> */
654 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
656 th->transport = RTSP_TRANSPORT_RDT;
658 if (!strcasecmp(lower_transport, "TCP"))
659 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
661 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
665 /* get each parameter */
666 while (*p != '\0' && *p != ',') {
667 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
668 if (!strcmp(parameter, "port")) {
671 rtsp_parse_range(&th->port_min, &th->port_max, &p);
673 } else if (!strcmp(parameter, "client_port")) {
676 rtsp_parse_range(&th->client_port_min,
677 &th->client_port_max, &p);
679 } else if (!strcmp(parameter, "server_port")) {
682 rtsp_parse_range(&th->server_port_min,
683 &th->server_port_max, &p);
685 } else if (!strcmp(parameter, "interleaved")) {
688 rtsp_parse_range(&th->interleaved_min,
689 &th->interleaved_max, &p);
691 } else if (!strcmp(parameter, "multicast")) {
692 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
693 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
694 } else if (!strcmp(parameter, "ttl")) {
697 th->ttl = strtol(p, (char **)&p, 10);
699 } else if (!strcmp(parameter, "destination")) {
700 struct in_addr ipaddr;
704 get_word_sep(buf, sizeof(buf), ";,", &p);
705 if (inet_aton(buf, &ipaddr))
706 th->destination = ntohl(ipaddr.s_addr);
709 while (*p != ';' && *p != '\0' && *p != ',')
717 reply->nb_transports++;
721 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
725 /* NOTE: we do case independent match for broken servers */
727 if (av_stristart(p, "Session:", &p)) {
728 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
729 } else if (av_stristart(p, "Content-Length:", &p)) {
730 reply->content_length = strtol(p, NULL, 10);
731 } else if (av_stristart(p, "Transport:", &p)) {
732 rtsp_parse_transport(reply, p);
733 } else if (av_stristart(p, "CSeq:", &p)) {
734 reply->seq = strtol(p, NULL, 10);
735 } else if (av_stristart(p, "Range:", &p)) {
736 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
737 } else if (av_stristart(p, "RealChallenge1:", &p)) {
739 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
743 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
749 ret = url_read(h, buf+len, size-len);
757 /* skip a RTP/TCP interleaved packet */
758 static void rtsp_skip_packet(AVFormatContext *s)
760 RTSPState *rt = s->priv_data;
764 ret = url_readbuf(rt->rtsp_hd, buf, 3);
767 len = AV_RB16(buf + 1);
769 printf("skipping RTP packet len=%d\n", len);
774 if (len1 > sizeof(buf))
776 ret = url_readbuf(rt->rtsp_hd, buf, len1);
783 static void rtsp_send_cmd(AVFormatContext *s,
784 const char *cmd, RTSPHeader *reply,
785 unsigned char **content_ptr)
787 RTSPState *rt = s->priv_data;
788 char buf[4096], buf1[1024], *q;
791 int content_length, line_count;
792 unsigned char *content = NULL;
794 memset(reply, 0, sizeof(RTSPHeader));
797 av_strlcpy(buf, cmd, sizeof(buf));
798 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
799 av_strlcat(buf, buf1, sizeof(buf));
800 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
801 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
802 av_strlcat(buf, buf1, sizeof(buf));
804 av_strlcat(buf, "\r\n", sizeof(buf));
806 printf("Sending:\n%s--\n", buf);
808 url_write(rt->rtsp_hd, buf, strlen(buf));
810 /* parse reply (XXX: use buffers) */
812 rt->last_reply[0] = '\0';
816 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
821 /* XXX: only parse it if first char on line ? */
823 } else if (ch != '\r') {
824 if ((q - buf) < sizeof(buf) - 1)
830 printf("line='%s'\n", buf);
832 /* test if last line */
836 if (line_count == 0) {
838 get_word(buf1, sizeof(buf1), &p);
839 get_word(buf1, sizeof(buf1), &p);
840 reply->status_code = atoi(buf1);
842 rtsp_parse_line(reply, p);
843 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
844 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
849 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
850 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
852 content_length = reply->content_length;
853 if (content_length > 0) {
854 /* leave some room for a trailing '\0' (useful for simple parsing) */
855 content = av_malloc(content_length + 1);
856 (void)url_readbuf(rt->rtsp_hd, content, content_length);
857 content[content_length] = '\0';
860 *content_ptr = content;
866 /* close and free RTSP streams */
867 static void rtsp_close_streams(RTSPState *rt)
872 for(i=0;i<rt->nb_rtsp_streams;i++) {
873 rtsp_st = rt->rtsp_streams[i];
875 if (rtsp_st->tx_ctx) {
876 if (rt->transport == RTSP_TRANSPORT_RDT)
877 ff_rdt_parse_close(rtsp_st->tx_ctx);
879 rtp_parse_close(rtsp_st->tx_ctx);
881 if (rtsp_st->rtp_handle)
882 url_close(rtsp_st->rtp_handle);
883 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
884 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
887 av_free(rt->rtsp_streams);
891 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
893 RTSPState *rt = s->priv_data;
896 /* open the RTP context */
897 if (rtsp_st->stream_index >= 0)
898 st = s->streams[rtsp_st->stream_index];
900 s->ctx_flags |= AVFMTCTX_NOHEADER;
902 if (rt->transport == RTSP_TRANSPORT_RDT)
903 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
904 rtsp_st->dynamic_protocol_context,
905 rtsp_st->dynamic_handler);
907 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
908 rtsp_st->sdp_payload_type,
909 &rtsp_st->rtp_payload_data);
911 if (!rtsp_st->tx_ctx) {
912 return AVERROR(ENOMEM);
913 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
914 if(rtsp_st->dynamic_handler) {
915 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
916 rtsp_st->dynamic_protocol_context,
917 rtsp_st->dynamic_handler);
925 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
928 make_setup_request (AVFormatContext *s, const char *host, int port,
929 int lower_transport, const char *real_challenge)
931 RTSPState *rt = s->priv_data;
934 RTSPHeader reply1, *reply = &reply1;
936 const char *trans_pref;
938 if (rt->transport == RTSP_TRANSPORT_RDT)
939 trans_pref = "x-pn-tng";
941 trans_pref = "RTP/AVP";
943 /* for each stream, make the setup request */
944 /* XXX: we assume the same server is used for the control of each
947 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
948 char transport[2048];
950 rtsp_st = rt->rtsp_streams[i];
953 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
956 /* first try in specified port range */
957 if (RTSP_RTP_PORT_MIN != 0) {
958 while(j <= RTSP_RTP_PORT_MAX) {
959 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
960 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
961 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
967 /* then try on any port
968 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
969 ** err = AVERROR_INVALIDDATA;
975 port = rtp_get_local_port(rtsp_st->rtp_handle);
976 snprintf(transport, sizeof(transport) - 1,
977 "%s/UDP;", trans_pref);
978 if (rt->server_type != RTSP_SERVER_REAL)
979 av_strlcat(transport, "unicast;", sizeof(transport));
980 av_strlcatf(transport, sizeof(transport),
981 "client_port=%d", port);
982 if (rt->transport == RTSP_TRANSPORT_RTP)
983 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
987 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
988 snprintf(transport, sizeof(transport) - 1,
989 "%s/TCP", trans_pref);
992 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
993 snprintf(transport, sizeof(transport) - 1,
994 "%s/UDP;multicast", trans_pref);
996 if (rt->server_type == RTSP_SERVER_REAL)
997 av_strlcat(transport, ";mode=play", sizeof(transport));
998 snprintf(cmd, sizeof(cmd),
999 "SETUP %s RTSP/1.0\r\n"
1000 "Transport: %s\r\n",
1001 rtsp_st->control_url, transport);
1002 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1003 char real_res[41], real_csum[9];
1004 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1006 av_strlcatf(cmd, sizeof(cmd),
1008 "RealChallenge2: %s, sd=%s\r\n",
1009 rt->session_id, real_res, real_csum);
1011 rtsp_send_cmd(s, cmd, reply, NULL);
1012 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1015 } else if (reply->status_code != RTSP_STATUS_OK ||
1016 reply->nb_transports != 1) {
1017 err = AVERROR_INVALIDDATA;
1021 /* XXX: same protocol for all streams is required */
1023 if (reply->transports[0].lower_transport != rt->lower_transport ||
1024 reply->transports[0].transport != rt->transport) {
1025 err = AVERROR_INVALIDDATA;
1029 rt->lower_transport = reply->transports[0].lower_transport;
1030 rt->transport = reply->transports[0].transport;
1033 /* close RTP connection if not choosen */
1034 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1035 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1036 url_close(rtsp_st->rtp_handle);
1037 rtsp_st->rtp_handle = NULL;
1040 switch(reply->transports[0].lower_transport) {
1041 case RTSP_LOWER_TRANSPORT_TCP:
1042 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1043 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1046 case RTSP_LOWER_TRANSPORT_UDP:
1050 /* XXX: also use address if specified */
1051 snprintf(url, sizeof(url), "rtp://%s:%d",
1052 host, reply->transports[0].server_port_min);
1053 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1054 err = AVERROR_INVALIDDATA;
1059 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1064 in.s_addr = htonl(reply->transports[0].destination);
1065 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1067 reply->transports[0].port_min,
1068 reply->transports[0].ttl);
1069 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1070 err = AVERROR_INVALIDDATA;
1077 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1081 if (rt->server_type == RTSP_SERVER_REAL)
1082 rt->need_subscription = 1;
1087 for (i=0; i<rt->nb_rtsp_streams; i++) {
1088 if (rt->rtsp_streams[i]->rtp_handle) {
1089 url_close(rt->rtsp_streams[i]->rtp_handle);
1090 rt->rtsp_streams[i]->rtp_handle = NULL;
1096 static int rtsp_read_header(AVFormatContext *s,
1097 AVFormatParameters *ap)
1099 RTSPState *rt = s->priv_data;
1100 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1101 URLContext *rtsp_hd;
1103 RTSPHeader reply1, *reply = &reply1;
1104 unsigned char *content = NULL;
1105 int lower_transport_mask = 0;
1106 char real_challenge[64];
1108 /* extract hostname and port */
1109 url_split(NULL, 0, NULL, 0,
1110 host, sizeof(host), &port, path, sizeof(path), s->filename);
1112 port = RTSP_DEFAULT_PORT;
1114 /* search for options */
1115 option_list = strchr(path, '?');
1117 /* remove the options from the path */
1119 while(option_list) {
1120 /* move the option pointer */
1121 option = option_list;
1122 option_list = strchr(option_list, '&');
1124 *(option_list++) = 0;
1125 /* handle the options */
1126 if (strcmp(option, "udp") == 0)
1127 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1128 else if (strcmp(option, "multicast") == 0)
1129 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1130 else if (strcmp(option, "tcp") == 0)
1131 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1135 if (!lower_transport_mask)
1136 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
1138 /* open the tcp connexion */
1139 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1140 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1141 return AVERROR(EIO);
1142 rt->rtsp_hd = rtsp_hd;
1145 /* request options supported by the server; this also detects server type */
1146 for (rt->server_type = RTSP_SERVER_RTP;;) {
1147 snprintf(cmd, sizeof(cmd),
1148 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1149 if (rt->server_type == RTSP_SERVER_REAL)
1152 * The following entries are required for proper
1153 * streaming from a Realmedia server. They are
1154 * interdependent in some way although we currently
1155 * don't quite understand how. Values were copied
1156 * from mplayer SVN r23589.
1157 * @param CompanyID is a 16-byte ID in base64
1158 * @param ClientChallenge is a 16-byte ID in hex
1160 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1161 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1162 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1163 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1165 rtsp_send_cmd(s, cmd, reply, NULL);
1166 if (reply->status_code != RTSP_STATUS_OK) {
1167 err = AVERROR_INVALIDDATA;
1171 /* detect server type if not standard-compliant RTP */
1172 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1173 rt->server_type = RTSP_SERVER_REAL;
1175 } else if (rt->server_type == RTSP_SERVER_REAL) {
1176 strcpy(real_challenge, reply->real_challenge);
1181 /* describe the stream */
1182 snprintf(cmd, sizeof(cmd),
1183 "DESCRIBE %s RTSP/1.0\r\n"
1184 "Accept: application/sdp\r\n",
1186 if (rt->server_type == RTSP_SERVER_REAL) {
1188 * The Require: attribute is needed for proper streaming from
1189 * Realmedia servers.
1192 "Require: com.real.retain-entity-for-setup\r\n",
1195 rtsp_send_cmd(s, cmd, reply, &content);
1197 err = AVERROR_INVALIDDATA;
1200 if (reply->status_code != RTSP_STATUS_OK) {
1201 err = AVERROR_INVALIDDATA;
1205 /* now we got the SDP description, we parse it */
1206 ret = sdp_parse(s, (const char *)content);
1209 err = AVERROR_INVALIDDATA;
1214 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1216 err = make_setup_request(s, host, port, lower_transport,
1217 rt->server_type == RTSP_SERVER_REAL ?
1218 real_challenge : NULL);
1221 lower_transport_mask &= ~(1 << lower_transport);
1222 if (lower_transport_mask == 0 && err == 1) {
1223 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1228 rt->state = RTSP_STATE_IDLE;
1229 rt->seek_timestamp = 0; /* default is to start stream at position
1231 if (ap->initial_pause) {
1232 /* do not start immediately */
1234 if (rtsp_read_play(s) < 0) {
1235 err = AVERROR_INVALIDDATA;
1241 rtsp_close_streams(rt);
1243 url_close(rt->rtsp_hd);
1247 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1248 uint8_t *buf, int buf_size)
1250 RTSPState *rt = s->priv_data;
1251 int id, len, i, ret;
1252 RTSPStream *rtsp_st;
1254 #ifdef DEBUG_RTP_TCP
1255 printf("tcp_read_packet:\n");
1259 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1260 #ifdef DEBUG_RTP_TCP
1261 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1268 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1272 len = AV_RB16(buf + 1);
1273 #ifdef DEBUG_RTP_TCP
1274 printf("id=%d len=%d\n", id, len);
1276 if (len > buf_size || len < 12)
1279 ret = url_readbuf(rt->rtsp_hd, buf, len);
1282 if (rt->transport == RTSP_TRANSPORT_RDT &&
1283 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1286 /* find the matching stream */
1287 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1288 rtsp_st = rt->rtsp_streams[i];
1289 if (id >= rtsp_st->interleaved_min &&
1290 id <= rtsp_st->interleaved_max)
1295 *prtsp_st = rtsp_st;
1299 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1300 uint8_t *buf, int buf_size)
1302 RTSPState *rt = s->priv_data;
1303 RTSPStream *rtsp_st;
1305 int fd1, fd2, fd_max, n, i, ret;
1309 if (url_interrupt_cb())
1310 return AVERROR(EINTR);
1313 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1314 rtsp_st = rt->rtsp_streams[i];
1315 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1316 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1322 tv.tv_usec = 100 * 1000;
1323 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1325 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1326 rtsp_st = rt->rtsp_streams[i];
1327 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1328 if (FD_ISSET(fd1, &rfds)) {
1329 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1331 *prtsp_st = rtsp_st;
1340 static int rtsp_read_packet(AVFormatContext *s,
1343 RTSPState *rt = s->priv_data;
1344 RTSPStream *rtsp_st;
1346 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1348 if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1350 RTSPHeader reply1, *reply = &reply1;
1353 snprintf(cmd, sizeof(cmd),
1354 "SET_PARAMETER %s RTSP/1.0\r\n"
1357 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1358 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
1359 ff_rdt_subscribe_rule(cmd, sizeof(cmd), i, 0);
1360 if (rt->transport == RTSP_TRANSPORT_RDT)
1361 ff_rdt_subscribe_rule2(
1362 rt->rtsp_streams[i]->tx_ctx,
1363 cmd, sizeof(cmd), i, 0);
1365 av_strlcat(cmd, "\r\n", sizeof(cmd));
1366 rtsp_send_cmd(s, cmd, reply, NULL);
1367 if (reply->status_code != RTSP_STATUS_OK)
1368 return AVERROR_INVALIDDATA;
1369 rt->need_subscription = 0;
1371 if (rt->state == RTSP_STATE_PLAYING)
1375 /* get next frames from the same RTP packet */
1377 if (rt->transport == RTSP_TRANSPORT_RDT)
1378 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
1380 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
1384 } else if (ret == 1) {
1391 /* read next RTP packet */
1393 switch(rt->lower_transport) {
1395 case RTSP_LOWER_TRANSPORT_TCP:
1396 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1398 case RTSP_LOWER_TRANSPORT_UDP:
1399 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1400 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1401 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
1402 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1407 if (rt->transport == RTSP_TRANSPORT_RDT)
1408 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1410 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1414 /* more packets may follow, so we save the RTP context */
1415 rt->cur_tx = rtsp_st->tx_ctx;
1420 static int rtsp_read_play(AVFormatContext *s)
1422 RTSPState *rt = s->priv_data;
1423 RTSPHeader reply1, *reply = &reply1;
1426 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1428 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1429 if (rt->state == RTSP_STATE_PAUSED) {
1430 snprintf(cmd, sizeof(cmd),
1431 "PLAY %s RTSP/1.0\r\n",
1434 snprintf(cmd, sizeof(cmd),
1435 "PLAY %s RTSP/1.0\r\n"
1436 "Range: npt=%0.3f-\r\n",
1438 (double)rt->seek_timestamp / AV_TIME_BASE);
1440 rtsp_send_cmd(s, cmd, reply, NULL);
1441 if (reply->status_code != RTSP_STATUS_OK) {
1445 rt->state = RTSP_STATE_PLAYING;
1449 /* pause the stream */
1450 static int rtsp_read_pause(AVFormatContext *s)
1452 RTSPState *rt = s->priv_data;
1453 RTSPHeader reply1, *reply = &reply1;
1458 if (rt->state != RTSP_STATE_PLAYING)
1460 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1461 snprintf(cmd, sizeof(cmd),
1462 "PAUSE %s RTSP/1.0\r\n",
1464 rtsp_send_cmd(s, cmd, reply, NULL);
1465 if (reply->status_code != RTSP_STATUS_OK) {
1469 rt->state = RTSP_STATE_PAUSED;
1473 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1474 int64_t timestamp, int flags)
1476 RTSPState *rt = s->priv_data;
1478 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1481 case RTSP_STATE_IDLE:
1483 case RTSP_STATE_PLAYING:
1484 if (rtsp_read_play(s) != 0)
1487 case RTSP_STATE_PAUSED:
1488 rt->state = RTSP_STATE_IDLE;
1494 static int rtsp_read_close(AVFormatContext *s)
1496 RTSPState *rt = s->priv_data;
1497 RTSPHeader reply1, *reply = &reply1;
1501 /* NOTE: it is valid to flush the buffer here */
1502 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1503 url_fclose(&rt->rtsp_gb);
1506 snprintf(cmd, sizeof(cmd),
1507 "TEARDOWN %s RTSP/1.0\r\n",
1509 rtsp_send_cmd(s, cmd, reply, NULL);
1511 rtsp_close_streams(rt);
1512 url_close(rt->rtsp_hd);
1516 #ifdef CONFIG_RTSP_DEMUXER
1517 AVInputFormat rtsp_demuxer = {
1519 NULL_IF_CONFIG_SMALL("RTSP input format"),
1526 .flags = AVFMT_NOFILE,
1527 .read_play = rtsp_read_play,
1528 .read_pause = rtsp_read_pause,
1532 static int sdp_probe(AVProbeData *p1)
1534 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1536 /* we look for a line beginning "c=IN IP4" */
1537 while (p < p_end && *p != '\0') {
1538 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1539 return AVPROBE_SCORE_MAX / 2;
1541 while(p < p_end - 1 && *p != '\n') p++;
1550 #define SDP_MAX_SIZE 8192
1552 static int sdp_read_header(AVFormatContext *s,
1553 AVFormatParameters *ap)
1555 RTSPState *rt = s->priv_data;
1556 RTSPStream *rtsp_st;
1561 /* read the whole sdp file */
1562 /* XXX: better loading */
1563 content = av_malloc(SDP_MAX_SIZE);
1564 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1567 return AVERROR_INVALIDDATA;
1569 content[size] ='\0';
1571 sdp_parse(s, content);
1574 /* open each RTP stream */
1575 for(i=0;i<rt->nb_rtsp_streams;i++) {
1576 rtsp_st = rt->rtsp_streams[i];
1578 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1579 inet_ntoa(rtsp_st->sdp_ip),
1583 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1584 err = AVERROR_INVALIDDATA;
1587 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1592 rtsp_close_streams(rt);
1596 static int sdp_read_packet(AVFormatContext *s,
1599 return rtsp_read_packet(s, pkt);
1602 static int sdp_read_close(AVFormatContext *s)
1604 RTSPState *rt = s->priv_data;
1605 rtsp_close_streams(rt);
1609 #ifdef CONFIG_SDP_DEMUXER
1610 AVInputFormat sdp_demuxer = {
1612 NULL_IF_CONFIG_SMALL("SDP"),
1621 #ifdef CONFIG_REDIR_DEMUXER
1622 /* dummy redirector format (used directly in av_open_input_file now) */
1623 static int redir_probe(AVProbeData *pd)
1627 while (redir_isspace(*p))
1629 if (av_strstart(p, "http://", NULL) ||
1630 av_strstart(p, "rtsp://", NULL))
1631 return AVPROBE_SCORE_MAX;
1635 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1639 AVFormatContext *ic = NULL;
1640 ByteIOContext *f = s->pb;
1642 /* parse each URL and try to open it */
1644 while (c != URL_EOF) {
1647 if (!redir_isspace(c))
1656 if (c == URL_EOF || redir_isspace(c))
1658 if ((q - buf) < sizeof(buf) - 1)
1663 //printf("URL='%s'\n", buf);
1664 /* try to open the media file */
1665 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1669 return AVERROR(EIO);
1677 AVInputFormat redir_demuxer = {
1679 NULL_IF_CONFIG_SMALL("Redirector format"),