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 ? */
76 RTPDemuxContext *cur_rtp;
77 int need_subscription;
80 typedef struct RTSPStream {
81 URLContext *rtp_handle; /* RTP stream handle */
82 RTPDemuxContext *rtp_ctx; /* RTP 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 void *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 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 int codec_type, payload_type, i;
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(st, 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(st, 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->streams[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->rtp_ctx)
876 rtp_parse_close(rtsp_st->rtp_ctx);
877 if (rtsp_st->rtp_handle)
878 url_close(rtsp_st->rtp_handle);
879 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
880 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
883 av_free(rt->rtsp_streams);
887 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
891 /* open the RTP context */
892 if (rtsp_st->stream_index >= 0)
893 st = s->streams[rtsp_st->stream_index];
895 s->ctx_flags |= AVFMTCTX_NOHEADER;
896 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
898 if (!rtsp_st->rtp_ctx) {
899 return AVERROR(ENOMEM);
901 if(rtsp_st->dynamic_handler) {
902 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
903 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
911 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
914 make_setup_request (AVFormatContext *s, const char *host, int port,
915 int lower_transport, const char *real_challenge)
917 RTSPState *rt = s->priv_data;
920 RTSPHeader reply1, *reply = &reply1;
922 const char *trans_pref;
924 if (rt->transport == RTSP_TRANSPORT_RDT)
925 trans_pref = "x-pn-tng";
927 trans_pref = "RTP/AVP";
929 /* for each stream, make the setup request */
930 /* XXX: we assume the same server is used for the control of each
933 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
934 char transport[2048];
936 rtsp_st = rt->rtsp_streams[i];
939 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
942 /* first try in specified port range */
943 if (RTSP_RTP_PORT_MIN != 0) {
944 while(j <= RTSP_RTP_PORT_MAX) {
945 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
946 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
947 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
953 /* then try on any port
954 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
955 ** err = AVERROR_INVALIDDATA;
961 port = rtp_get_local_port(rtsp_st->rtp_handle);
962 snprintf(transport, sizeof(transport) - 1,
963 "%s/UDP;", trans_pref);
964 if (rt->server_type != RTSP_SERVER_REAL)
965 av_strlcat(transport, "unicast;", sizeof(transport));
966 av_strlcatf(transport, sizeof(transport),
967 "client_port=%d", port);
968 if (rt->transport == RTSP_TRANSPORT_RTP)
969 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
973 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
974 snprintf(transport, sizeof(transport) - 1,
975 "%s/TCP", trans_pref);
978 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
979 snprintf(transport, sizeof(transport) - 1,
980 "%s/UDP;multicast", trans_pref);
982 if (rt->server_type == RTSP_SERVER_REAL)
983 av_strlcat(transport, ";mode=play", sizeof(transport));
984 snprintf(cmd, sizeof(cmd),
985 "SETUP %s RTSP/1.0\r\n"
987 rtsp_st->control_url, transport);
988 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
989 char real_res[41], real_csum[9];
990 ff_rdt_calc_response_and_checksum(real_res, real_csum,
992 av_strlcatf(cmd, sizeof(cmd),
994 "RealChallenge2: %s, sd=%s\r\n",
995 rt->session_id, real_res, real_csum);
997 rtsp_send_cmd(s, cmd, reply, NULL);
998 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1001 } else if (reply->status_code != RTSP_STATUS_OK ||
1002 reply->nb_transports != 1) {
1003 err = AVERROR_INVALIDDATA;
1007 /* XXX: same protocol for all streams is required */
1009 if (reply->transports[0].lower_transport != rt->lower_transport ||
1010 reply->transports[0].transport != rt->transport) {
1011 err = AVERROR_INVALIDDATA;
1015 rt->lower_transport = reply->transports[0].lower_transport;
1016 rt->transport = reply->transports[0].transport;
1019 /* close RTP connection if not choosen */
1020 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1021 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1022 url_close(rtsp_st->rtp_handle);
1023 rtsp_st->rtp_handle = NULL;
1026 switch(reply->transports[0].lower_transport) {
1027 case RTSP_LOWER_TRANSPORT_TCP:
1028 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1029 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1032 case RTSP_LOWER_TRANSPORT_UDP:
1036 /* XXX: also use address if specified */
1037 snprintf(url, sizeof(url), "rtp://%s:%d",
1038 host, reply->transports[0].server_port_min);
1039 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1040 err = AVERROR_INVALIDDATA;
1045 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1050 in.s_addr = htonl(reply->transports[0].destination);
1051 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1053 reply->transports[0].port_min,
1054 reply->transports[0].ttl);
1055 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1056 err = AVERROR_INVALIDDATA;
1063 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1067 if (rt->server_type == RTSP_SERVER_REAL)
1068 rt->need_subscription = 1;
1073 for (i=0; i<rt->nb_rtsp_streams; i++) {
1074 if (rt->rtsp_streams[i]->rtp_handle) {
1075 url_close(rt->rtsp_streams[i]->rtp_handle);
1076 rt->rtsp_streams[i]->rtp_handle = NULL;
1082 static int rtsp_read_header(AVFormatContext *s,
1083 AVFormatParameters *ap)
1085 RTSPState *rt = s->priv_data;
1086 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1087 URLContext *rtsp_hd;
1089 RTSPHeader reply1, *reply = &reply1;
1090 unsigned char *content = NULL;
1091 int lower_transport_mask = 0;
1092 char real_challenge[64];
1094 /* extract hostname and port */
1095 url_split(NULL, 0, NULL, 0,
1096 host, sizeof(host), &port, path, sizeof(path), s->filename);
1098 port = RTSP_DEFAULT_PORT;
1100 /* search for options */
1101 option_list = strchr(path, '?');
1103 /* remove the options from the path */
1105 while(option_list) {
1106 /* move the option pointer */
1107 option = option_list;
1108 option_list = strchr(option_list, '&');
1110 *(option_list++) = 0;
1111 /* handle the options */
1112 if (strcmp(option, "udp") == 0)
1113 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1114 else if (strcmp(option, "multicast") == 0)
1115 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1116 else if (strcmp(option, "tcp") == 0)
1117 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1121 if (!lower_transport_mask)
1122 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
1124 /* open the tcp connexion */
1125 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1126 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1127 return AVERROR(EIO);
1128 rt->rtsp_hd = rtsp_hd;
1131 /* request options supported by the server; this also detects server type */
1132 for (rt->server_type = RTSP_SERVER_RTP;;) {
1133 snprintf(cmd, sizeof(cmd),
1134 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1135 if (rt->server_type == RTSP_SERVER_REAL)
1138 * The following entries are required for proper
1139 * streaming from a Realmedia server. They are
1140 * interdependent in some way although we currently
1141 * don't quite understand how. Values were copied
1142 * from mplayer SVN r23589.
1143 * @param CompanyID is a 16-byte ID in base64
1144 * @param ClientChallenge is a 16-byte ID in hex
1146 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1147 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1148 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1149 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1151 rtsp_send_cmd(s, cmd, reply, NULL);
1152 if (reply->status_code != RTSP_STATUS_OK) {
1153 err = AVERROR_INVALIDDATA;
1157 /* detect server type if not standard-compliant RTP */
1158 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1159 rt->server_type = RTSP_SERVER_REAL;
1161 } else if (rt->server_type == RTSP_SERVER_REAL) {
1162 strcpy(real_challenge, reply->real_challenge);
1167 /* describe the stream */
1168 snprintf(cmd, sizeof(cmd),
1169 "DESCRIBE %s RTSP/1.0\r\n"
1170 "Accept: application/sdp\r\n",
1172 if (rt->server_type == RTSP_SERVER_REAL) {
1174 * The Require: attribute is needed for proper streaming from
1175 * Realmedia servers.
1178 "Require: com.real.retain-entity-for-setup\r\n",
1181 rtsp_send_cmd(s, cmd, reply, &content);
1183 err = AVERROR_INVALIDDATA;
1186 if (reply->status_code != RTSP_STATUS_OK) {
1187 err = AVERROR_INVALIDDATA;
1191 /* now we got the SDP description, we parse it */
1192 ret = sdp_parse(s, (const char *)content);
1195 err = AVERROR_INVALIDDATA;
1200 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1202 err = make_setup_request(s, host, port, lower_transport,
1203 rt->server_type == RTSP_SERVER_REAL ?
1204 real_challenge : NULL);
1207 lower_transport_mask &= ~(1 << lower_transport);
1208 if (lower_transport_mask == 0 && err == 1) {
1209 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1214 rt->state = RTSP_STATE_IDLE;
1215 rt->seek_timestamp = 0; /* default is to start stream at position
1217 if (ap->initial_pause) {
1218 /* do not start immediately */
1220 if (rtsp_read_play(s) < 0) {
1221 err = AVERROR_INVALIDDATA;
1227 rtsp_close_streams(rt);
1229 url_close(rt->rtsp_hd);
1233 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1234 uint8_t *buf, int buf_size)
1236 RTSPState *rt = s->priv_data;
1237 int id, len, i, ret;
1238 RTSPStream *rtsp_st;
1240 #ifdef DEBUG_RTP_TCP
1241 printf("tcp_read_packet:\n");
1245 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1246 #ifdef DEBUG_RTP_TCP
1247 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1254 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1258 len = AV_RB16(buf + 1);
1259 #ifdef DEBUG_RTP_TCP
1260 printf("id=%d len=%d\n", id, len);
1262 if (len > buf_size || len < 12)
1265 ret = url_readbuf(rt->rtsp_hd, buf, len);
1268 if (rt->transport == RTSP_TRANSPORT_RDT &&
1269 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL) < 0)
1272 /* find the matching stream */
1273 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1274 rtsp_st = rt->rtsp_streams[i];
1275 if (id >= rtsp_st->interleaved_min &&
1276 id <= rtsp_st->interleaved_max)
1281 *prtsp_st = rtsp_st;
1285 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1286 uint8_t *buf, int buf_size)
1288 RTSPState *rt = s->priv_data;
1289 RTSPStream *rtsp_st;
1291 int fd1, fd2, fd_max, n, i, ret;
1295 if (url_interrupt_cb())
1296 return AVERROR(EINTR);
1299 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1300 rtsp_st = rt->rtsp_streams[i];
1301 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1302 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1308 tv.tv_usec = 100 * 1000;
1309 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1311 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1312 rtsp_st = rt->rtsp_streams[i];
1313 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1314 if (FD_ISSET(fd1, &rfds)) {
1315 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1317 *prtsp_st = rtsp_st;
1326 static int rtsp_read_packet(AVFormatContext *s,
1329 RTSPState *rt = s->priv_data;
1330 RTSPStream *rtsp_st;
1332 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1334 if (rt->server_type == RTSP_SERVER_REAL && rt->need_subscription) {
1336 RTSPHeader reply1, *reply = &reply1;
1339 snprintf(cmd, sizeof(cmd),
1340 "SET_PARAMETER %s RTSP/1.0\r\n"
1343 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1344 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
1345 ff_rdt_subscribe_rule(cmd, sizeof(cmd), i, 0);
1346 if (rt->transport == RTSP_TRANSPORT_RDT)
1347 ff_rdt_subscribe_rule2(
1348 rt->rtsp_streams[i]->rtp_ctx,
1349 cmd, sizeof(cmd), i, 0);
1351 av_strlcat(cmd, "\r\n", sizeof(cmd));
1352 rtsp_send_cmd(s, cmd, reply, NULL);
1353 if (reply->status_code != RTSP_STATUS_OK)
1354 return AVERROR_INVALIDDATA;
1355 rt->need_subscription = 0;
1357 if (rt->state == RTSP_STATE_PLAYING)
1361 /* get next frames from the same RTP packet */
1363 if (rt->transport == RTSP_TRANSPORT_RDT)
1364 ret = ff_rdt_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1366 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1370 } else if (ret == 1) {
1377 /* read next RTP packet */
1379 switch(rt->lower_transport) {
1381 case RTSP_LOWER_TRANSPORT_TCP:
1382 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1384 case RTSP_LOWER_TRANSPORT_UDP:
1385 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1386 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1387 if (len >=0 && rtsp_st->rtp_ctx)
1388 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1393 if (rt->transport == RTSP_TRANSPORT_RDT)
1394 ret = ff_rdt_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1396 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1400 /* more packets may follow, so we save the RTP context */
1401 rt->cur_rtp = rtsp_st->rtp_ctx;
1406 static int rtsp_read_play(AVFormatContext *s)
1408 RTSPState *rt = s->priv_data;
1409 RTSPHeader reply1, *reply = &reply1;
1412 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1414 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1415 if (rt->state == RTSP_STATE_PAUSED) {
1416 snprintf(cmd, sizeof(cmd),
1417 "PLAY %s RTSP/1.0\r\n",
1420 snprintf(cmd, sizeof(cmd),
1421 "PLAY %s RTSP/1.0\r\n"
1422 "Range: npt=%0.3f-\r\n",
1424 (double)rt->seek_timestamp / AV_TIME_BASE);
1426 rtsp_send_cmd(s, cmd, reply, NULL);
1427 if (reply->status_code != RTSP_STATUS_OK) {
1431 rt->state = RTSP_STATE_PLAYING;
1435 /* pause the stream */
1436 static int rtsp_read_pause(AVFormatContext *s)
1438 RTSPState *rt = s->priv_data;
1439 RTSPHeader reply1, *reply = &reply1;
1444 if (rt->state != RTSP_STATE_PLAYING)
1446 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1447 snprintf(cmd, sizeof(cmd),
1448 "PAUSE %s RTSP/1.0\r\n",
1450 rtsp_send_cmd(s, cmd, reply, NULL);
1451 if (reply->status_code != RTSP_STATUS_OK) {
1455 rt->state = RTSP_STATE_PAUSED;
1459 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1460 int64_t timestamp, int flags)
1462 RTSPState *rt = s->priv_data;
1464 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1467 case RTSP_STATE_IDLE:
1469 case RTSP_STATE_PLAYING:
1470 if (rtsp_read_play(s) != 0)
1473 case RTSP_STATE_PAUSED:
1474 rt->state = RTSP_STATE_IDLE;
1480 static int rtsp_read_close(AVFormatContext *s)
1482 RTSPState *rt = s->priv_data;
1483 RTSPHeader reply1, *reply = &reply1;
1487 /* NOTE: it is valid to flush the buffer here */
1488 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1489 url_fclose(&rt->rtsp_gb);
1492 snprintf(cmd, sizeof(cmd),
1493 "TEARDOWN %s RTSP/1.0\r\n",
1495 rtsp_send_cmd(s, cmd, reply, NULL);
1497 rtsp_close_streams(rt);
1498 url_close(rt->rtsp_hd);
1502 #ifdef CONFIG_RTSP_DEMUXER
1503 AVInputFormat rtsp_demuxer = {
1505 NULL_IF_CONFIG_SMALL("RTSP input format"),
1512 .flags = AVFMT_NOFILE,
1513 .read_play = rtsp_read_play,
1514 .read_pause = rtsp_read_pause,
1518 static int sdp_probe(AVProbeData *p1)
1520 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1522 /* we look for a line beginning "c=IN IP4" */
1523 while (p < p_end && *p != '\0') {
1524 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1525 return AVPROBE_SCORE_MAX / 2;
1527 while(p < p_end - 1 && *p != '\n') p++;
1536 #define SDP_MAX_SIZE 8192
1538 static int sdp_read_header(AVFormatContext *s,
1539 AVFormatParameters *ap)
1541 RTSPState *rt = s->priv_data;
1542 RTSPStream *rtsp_st;
1547 /* read the whole sdp file */
1548 /* XXX: better loading */
1549 content = av_malloc(SDP_MAX_SIZE);
1550 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1553 return AVERROR_INVALIDDATA;
1555 content[size] ='\0';
1557 sdp_parse(s, content);
1560 /* open each RTP stream */
1561 for(i=0;i<rt->nb_rtsp_streams;i++) {
1562 rtsp_st = rt->rtsp_streams[i];
1564 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1565 inet_ntoa(rtsp_st->sdp_ip),
1569 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1570 err = AVERROR_INVALIDDATA;
1573 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1578 rtsp_close_streams(rt);
1582 static int sdp_read_packet(AVFormatContext *s,
1585 return rtsp_read_packet(s, pkt);
1588 static int sdp_read_close(AVFormatContext *s)
1590 RTSPState *rt = s->priv_data;
1591 rtsp_close_streams(rt);
1595 #ifdef CONFIG_SDP_DEMUXER
1596 AVInputFormat sdp_demuxer = {
1598 NULL_IF_CONFIG_SMALL("SDP"),
1607 #ifdef CONFIG_REDIR_DEMUXER
1608 /* dummy redirector format (used directly in av_open_input_file now) */
1609 static int redir_probe(AVProbeData *pd)
1613 while (redir_isspace(*p))
1615 if (av_strstart(p, "http://", NULL) ||
1616 av_strstart(p, "rtsp://", NULL))
1617 return AVPROBE_SCORE_MAX;
1621 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1625 AVFormatContext *ic = NULL;
1626 ByteIOContext *f = s->pb;
1628 /* parse each URL and try to open it */
1630 while (c != URL_EOF) {
1633 if (!redir_isspace(c))
1642 if (c == URL_EOF || redir_isspace(c))
1644 if ((q - buf) < sizeof(buf) - 1)
1649 //printf("URL='%s'\n", buf);
1650 /* try to open the media file */
1651 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1655 return AVERROR(EIO);
1663 AVInputFormat redir_demuxer = {
1665 NULL_IF_CONFIG_SMALL("Redirector format"),