3 * Copyright (c) 2002 Fabrice Bellard.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 /* needed by inet_aton() */
25 #include "libavutil/avstring.h"
29 #include <unistd.h> /* for select() prototype */
34 #include "rtp_internal.h"
38 //#define DEBUG_RTP_TCP
40 enum RTSPClientState {
47 RTSP_SERVER_RTP, /*< Standard-compliant RTP-server */
48 RTSP_SERVER_RDT, /*< Realmedia-style server */
52 typedef struct RTSPState {
53 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
55 struct RTSPStream **rtsp_streams;
57 enum RTSPClientState state;
58 int64_t seek_timestamp;
60 /* XXX: currently we use unbuffered input */
61 // ByteIOContext rtsp_gb;
62 int seq; /* RTSP command sequence number */
64 enum RTSPProtocol protocol;
65 enum RTSPServerType server_type;
66 char last_reply[2048]; /* XXX: allocate ? */
67 RTPDemuxContext *cur_rtp;
68 int need_subscription;
71 typedef struct RTSPStream {
72 URLContext *rtp_handle; /* RTP stream handle */
73 RTPDemuxContext *rtp_ctx; /* RTP parse context */
75 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
76 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
77 char control_url[1024]; /* url for this stream (from SDP) */
79 int sdp_port; /* port (from SDP content - not used in RTSP) */
80 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
81 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
82 int sdp_payload_type; /* payload type - only used in SDP */
83 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
85 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
86 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
89 static int rtsp_read_play(AVFormatContext *s);
91 /* XXX: currently, the only way to change the protocols consists in
92 changing this variable */
94 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
95 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
98 static int rtsp_probe(AVProbeData *p)
100 if (av_strstart(p->filename, "rtsp:", NULL))
101 return AVPROBE_SCORE_MAX;
105 static int redir_isspace(int c)
107 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
110 static void skip_spaces(const char **pp)
114 while (redir_isspace(*p))
119 static void get_word_sep(char *buf, int buf_size, const char *sep,
130 while (!strchr(sep, *p) && *p != '\0') {
131 if ((q - buf) < buf_size - 1)
140 static void get_word(char *buf, int buf_size, const char **pp)
148 while (!redir_isspace(*p) && *p != '\0') {
149 if ((q - buf) < buf_size - 1)
158 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
160 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
167 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
168 see if we can handle this kind of payload */
169 get_word_sep(buf, sizeof(buf), "/", &p);
170 if (payload_type >= RTP_PT_PRIVATE) {
171 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
173 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
174 codec->codec_id = handler->codec_id;
175 rtsp_st->dynamic_handler= handler;
177 rtsp_st->dynamic_protocol_context= handler->open();
181 handler= handler->next;
184 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
185 /* search into AVRtpPayloadTypes[] */
186 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
189 c = avcodec_find_decoder(codec->codec_id);
193 c_name = (char *)NULL;
196 get_word_sep(buf, sizeof(buf), "/", &p);
198 switch (codec->codec_type) {
199 case CODEC_TYPE_AUDIO:
200 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
201 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
202 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
204 codec->sample_rate = i;
205 get_word_sep(buf, sizeof(buf), "/", &p);
209 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
210 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
212 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
213 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
215 case CODEC_TYPE_VIDEO:
216 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
227 /* return the length and optionnaly the data */
228 static int hex_to_data(uint8_t *data, const char *p)
238 c = toupper((unsigned char)*p++);
239 if (c >= '0' && c <= '9')
241 else if (c >= 'A' && c <= 'F')
256 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
258 switch (codec->codec_id) {
261 if (!strcmp(attr, "config")) {
262 /* decode the hexa encoded parameter */
263 int len = hex_to_data(NULL, value);
264 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
265 if (!codec->extradata)
267 codec->extradata_size = len;
268 hex_to_data(codec->extradata, value);
277 typedef struct attrname_map
284 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
285 #define ATTR_NAME_TYPE_INT 0
286 #define ATTR_NAME_TYPE_STR 1
287 static attrname_map_t attr_names[]=
289 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
290 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
291 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
292 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
293 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
294 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
298 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
299 * because it is used in rtp_h264.c, which is forthcoming.
301 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
306 get_word_sep(attr, attr_size, "=", p);
309 get_word_sep(value, value_size, ";", p);
317 /* parse a SDP line and save stream attributes */
318 static void sdp_parse_fmtp(AVStream *st, const char *p)
324 RTSPStream *rtsp_st = st->priv_data;
325 AVCodecContext *codec = st->codec;
326 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
328 /* loop on each attribute */
329 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
331 /* grab the codec extra_data from the config parameter of the fmtp line */
332 sdp_parse_fmtp_config(codec, attr, value);
333 /* Looking for a known attribute */
334 for (i = 0; attr_names[i].str; ++i) {
335 if (!strcasecmp(attr, attr_names[i].str)) {
336 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
337 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
338 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
339 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
345 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
347 * Used for seeking in the rtp stream.
349 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
354 if (!av_stristart(p, "npt=", &p))
357 *start = AV_NOPTS_VALUE;
358 *end = AV_NOPTS_VALUE;
360 get_word_sep(buf, sizeof(buf), "-", &p);
361 *start = parse_date(buf, 1);
364 get_word_sep(buf, sizeof(buf), "-", &p);
365 *end = parse_date(buf, 1);
367 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
368 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
371 typedef struct SDPParseState {
373 struct in_addr default_ip;
377 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
378 int letter, const char *buf)
380 RTSPState *rt = s->priv_data;
381 char buf1[64], st_type[64];
383 int codec_type, payload_type, i;
386 struct in_addr sdp_ip;
390 printf("sdp: %c='%s'\n", letter, buf);
396 get_word(buf1, sizeof(buf1), &p);
397 if (strcmp(buf1, "IN") != 0)
399 get_word(buf1, sizeof(buf1), &p);
400 if (strcmp(buf1, "IP4") != 0)
402 get_word_sep(buf1, sizeof(buf1), "/", &p);
403 if (inet_aton(buf1, &sdp_ip) == 0)
408 get_word_sep(buf1, sizeof(buf1), "/", &p);
411 if (s->nb_streams == 0) {
412 s1->default_ip = sdp_ip;
413 s1->default_ttl = ttl;
415 st = s->streams[s->nb_streams - 1];
416 rtsp_st = st->priv_data;
417 rtsp_st->sdp_ip = sdp_ip;
418 rtsp_st->sdp_ttl = ttl;
422 av_strlcpy(s->title, p, sizeof(s->title));
425 if (s->nb_streams == 0) {
426 av_strlcpy(s->comment, p, sizeof(s->comment));
432 get_word(st_type, sizeof(st_type), &p);
433 if (!strcmp(st_type, "audio")) {
434 codec_type = CODEC_TYPE_AUDIO;
435 } else if (!strcmp(st_type, "video")) {
436 codec_type = CODEC_TYPE_VIDEO;
440 rtsp_st = av_mallocz(sizeof(RTSPStream));
443 rtsp_st->stream_index = -1;
444 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
446 rtsp_st->sdp_ip = s1->default_ip;
447 rtsp_st->sdp_ttl = s1->default_ttl;
449 get_word(buf1, sizeof(buf1), &p); /* port */
450 rtsp_st->sdp_port = atoi(buf1);
452 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
454 /* XXX: handle list of formats */
455 get_word(buf1, sizeof(buf1), &p); /* format list */
456 rtsp_st->sdp_payload_type = atoi(buf1);
458 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
459 /* no corresponding stream */
461 st = av_new_stream(s, 0);
464 st->priv_data = rtsp_st;
465 rtsp_st->stream_index = st->index;
466 st->codec->codec_type = codec_type;
467 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
468 /* if standard payload type, we can find the codec right now */
469 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
472 /* put a default control url */
473 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
476 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
478 /* get the control url */
479 st = s->streams[s->nb_streams - 1];
480 rtsp_st = st->priv_data;
482 /* XXX: may need to add full url resolution */
483 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
484 if (proto[0] == '\0') {
485 /* relative control URL */
486 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
487 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
489 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
491 } else if (av_strstart(p, "rtpmap:", &p)) {
492 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
493 get_word(buf1, sizeof(buf1), &p);
494 payload_type = atoi(buf1);
495 for(i = 0; i < s->nb_streams;i++) {
497 rtsp_st = st->priv_data;
498 if (rtsp_st->sdp_payload_type == payload_type) {
499 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
502 } else if (av_strstart(p, "fmtp:", &p)) {
503 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
504 get_word(buf1, sizeof(buf1), &p);
505 payload_type = atoi(buf1);
506 for(i = 0; i < s->nb_streams;i++) {
508 rtsp_st = st->priv_data;
509 if (rtsp_st->sdp_payload_type == payload_type) {
510 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
511 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
512 sdp_parse_fmtp(st, p);
515 sdp_parse_fmtp(st, p);
519 } else if(av_strstart(p, "framesize:", &p)) {
520 // let dynamic protocol handlers have a stab at the line.
521 get_word(buf1, sizeof(buf1), &p);
522 payload_type = atoi(buf1);
523 for(i = 0; i < s->nb_streams;i++) {
525 rtsp_st = st->priv_data;
526 if (rtsp_st->sdp_payload_type == payload_type) {
527 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
528 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
532 } else if(av_strstart(p, "range:", &p)) {
535 // this is so that seeking on a streamed file can work.
536 rtsp_parse_range_npt(p, &start, &end);
537 s->start_time= start;
538 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
539 } else if (s->nb_streams > 0) {
540 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
541 if (rtsp_st->dynamic_handler &&
542 rtsp_st->dynamic_handler->parse_sdp_a_line)
543 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
544 rtsp_st->dynamic_protocol_context, buf);
550 static int sdp_parse(AVFormatContext *s, const char *content)
555 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
557 memset(s1, 0, sizeof(SDPParseState));
568 /* get the content */
570 while (*p != '\n' && *p != '\r' && *p != '\0') {
571 if ((q - buf) < sizeof(buf) - 1)
576 sdp_parse_line(s, s1, letter, buf);
578 while (*p != '\n' && *p != '\0')
586 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
593 v = strtol(p, (char **)&p, 10);
597 v = strtol(p, (char **)&p, 10);
606 /* XXX: only one transport specification is parsed */
607 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
609 char transport_protocol[16];
611 char lower_transport[16];
613 RTSPTransportField *th;
616 reply->nb_transports = 0;
623 th = &reply->transports[reply->nb_transports];
625 get_word_sep(transport_protocol, sizeof(transport_protocol),
629 if (!strcasecmp (transport_protocol, "rtp")) {
630 get_word_sep(profile, sizeof(profile), "/;,", &p);
631 lower_transport[0] = '\0';
632 /* rtp/avp/<protocol> */
635 get_word_sep(lower_transport, sizeof(lower_transport),
638 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
639 /* x-pn-tng/<protocol> */
640 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
643 if (!strcasecmp(lower_transport, "TCP"))
644 th->protocol = RTSP_PROTOCOL_RTP_TCP;
646 th->protocol = RTSP_PROTOCOL_RTP_UDP;
650 /* get each parameter */
651 while (*p != '\0' && *p != ',') {
652 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
653 if (!strcmp(parameter, "port")) {
656 rtsp_parse_range(&th->port_min, &th->port_max, &p);
658 } else if (!strcmp(parameter, "client_port")) {
661 rtsp_parse_range(&th->client_port_min,
662 &th->client_port_max, &p);
664 } else if (!strcmp(parameter, "server_port")) {
667 rtsp_parse_range(&th->server_port_min,
668 &th->server_port_max, &p);
670 } else if (!strcmp(parameter, "interleaved")) {
673 rtsp_parse_range(&th->interleaved_min,
674 &th->interleaved_max, &p);
676 } else if (!strcmp(parameter, "multicast")) {
677 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
678 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
679 } else if (!strcmp(parameter, "ttl")) {
682 th->ttl = strtol(p, (char **)&p, 10);
684 } else if (!strcmp(parameter, "destination")) {
685 struct in_addr ipaddr;
689 get_word_sep(buf, sizeof(buf), ";,", &p);
690 if (inet_aton(buf, &ipaddr))
691 th->destination = ntohl(ipaddr.s_addr);
694 while (*p != ';' && *p != '\0' && *p != ',')
702 reply->nb_transports++;
706 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
710 /* NOTE: we do case independent match for broken servers */
712 if (av_stristart(p, "Session:", &p)) {
713 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
714 } else if (av_stristart(p, "Content-Length:", &p)) {
715 reply->content_length = strtol(p, NULL, 10);
716 } else if (av_stristart(p, "Transport:", &p)) {
717 rtsp_parse_transport(reply, p);
718 } else if (av_stristart(p, "CSeq:", &p)) {
719 reply->seq = strtol(p, NULL, 10);
720 } else if (av_stristart(p, "Range:", &p)) {
721 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
722 } else if (av_stristart(p, "RealChallenge1:", &p)) {
724 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
728 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
734 ret = url_read(h, buf+len, size-len);
742 /* skip a RTP/TCP interleaved packet */
743 static void rtsp_skip_packet(AVFormatContext *s)
745 RTSPState *rt = s->priv_data;
749 ret = url_readbuf(rt->rtsp_hd, buf, 3);
752 len = AV_RB16(buf + 1);
754 printf("skipping RTP packet len=%d\n", len);
759 if (len1 > sizeof(buf))
761 ret = url_readbuf(rt->rtsp_hd, buf, len1);
768 static void rtsp_send_cmd(AVFormatContext *s,
769 const char *cmd, RTSPHeader *reply,
770 unsigned char **content_ptr)
772 RTSPState *rt = s->priv_data;
773 char buf[4096], buf1[1024], *q;
776 int content_length, line_count;
777 unsigned char *content = NULL;
779 memset(reply, 0, sizeof(RTSPHeader));
782 av_strlcpy(buf, cmd, sizeof(buf));
783 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
784 av_strlcat(buf, buf1, sizeof(buf));
785 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
786 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
787 av_strlcat(buf, buf1, sizeof(buf));
789 av_strlcat(buf, "\r\n", sizeof(buf));
791 printf("Sending:\n%s--\n", buf);
793 url_write(rt->rtsp_hd, buf, strlen(buf));
795 /* parse reply (XXX: use buffers) */
797 rt->last_reply[0] = '\0';
801 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
806 /* XXX: only parse it if first char on line ? */
808 } else if (ch != '\r') {
809 if ((q - buf) < sizeof(buf) - 1)
815 printf("line='%s'\n", buf);
817 /* test if last line */
821 if (line_count == 0) {
823 get_word(buf1, sizeof(buf1), &p);
824 get_word(buf1, sizeof(buf1), &p);
825 reply->status_code = atoi(buf1);
827 rtsp_parse_line(reply, p);
828 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
829 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
834 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
835 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
837 content_length = reply->content_length;
838 if (content_length > 0) {
839 /* leave some room for a trailing '\0' (useful for simple parsing) */
840 content = av_malloc(content_length + 1);
841 (void)url_readbuf(rt->rtsp_hd, content, content_length);
842 content[content_length] = '\0';
845 *content_ptr = content;
851 /* close and free RTSP streams */
852 static void rtsp_close_streams(RTSPState *rt)
857 for(i=0;i<rt->nb_rtsp_streams;i++) {
858 rtsp_st = rt->rtsp_streams[i];
860 if (rtsp_st->rtp_ctx)
861 rtp_parse_close(rtsp_st->rtp_ctx);
862 if (rtsp_st->rtp_handle)
863 url_close(rtsp_st->rtp_handle);
864 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
865 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
868 av_free(rt->rtsp_streams);
872 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
876 /* open the RTP context */
877 if (rtsp_st->stream_index >= 0)
878 st = s->streams[rtsp_st->stream_index];
880 s->ctx_flags |= AVFMTCTX_NOHEADER;
881 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
883 if (!rtsp_st->rtp_ctx) {
884 return AVERROR(ENOMEM);
886 if(rtsp_st->dynamic_handler) {
887 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
888 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
896 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
899 make_setup_request (AVFormatContext *s, const char *host, int port,
900 int protocol, const char *real_challenge)
902 RTSPState *rt = s->priv_data;
905 RTSPHeader reply1, *reply = &reply1;
907 const char *trans_pref;
909 if (rt->server_type == RTSP_SERVER_RDT)
910 trans_pref = "x-pn-tng";
912 trans_pref = "RTP/AVP";
914 /* for each stream, make the setup request */
915 /* XXX: we assume the same server is used for the control of each
918 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
919 char transport[2048];
921 rtsp_st = rt->rtsp_streams[i];
924 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
927 /* first try in specified port range */
928 if (RTSP_RTP_PORT_MIN != 0) {
929 while(j <= RTSP_RTP_PORT_MAX) {
930 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
931 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
932 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
938 /* then try on any port
939 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
940 ** err = AVERROR_INVALIDDATA;
946 port = rtp_get_local_port(rtsp_st->rtp_handle);
947 snprintf(transport, sizeof(transport) - 1,
948 "%s/UDP;unicast;client_port=%d",
950 if (rt->server_type == RTSP_SERVER_RTP)
951 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
955 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
956 snprintf(transport, sizeof(transport) - 1,
957 "%s/TCP", trans_pref);
960 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
961 snprintf(transport, sizeof(transport) - 1,
962 "%s/UDP;multicast", trans_pref);
964 if (rt->server_type == RTSP_SERVER_RDT)
965 av_strlcat(transport, ";mode=play", sizeof(transport));
966 snprintf(cmd, sizeof(cmd),
967 "SETUP %s RTSP/1.0\r\n"
969 rtsp_st->control_url, transport);
970 if (i == 0 && rt->server_type == RTSP_SERVER_RDT) {
971 char real_res[41], real_csum[9];
972 ff_rdt_calc_response_and_checksum(real_res, real_csum,
974 av_strlcatf(cmd, sizeof(cmd),
976 "RealChallenge2: %s, sd=%s\r\n",
977 rt->session_id, real_res, real_csum);
979 rtsp_send_cmd(s, cmd, reply, NULL);
980 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
983 } else if (reply->status_code != RTSP_STATUS_OK ||
984 reply->nb_transports != 1) {
985 err = AVERROR_INVALIDDATA;
989 /* XXX: same protocol for all streams is required */
991 if (reply->transports[0].protocol != rt->protocol) {
992 err = AVERROR_INVALIDDATA;
996 rt->protocol = reply->transports[0].protocol;
999 /* close RTP connection if not choosen */
1000 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
1001 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
1002 url_close(rtsp_st->rtp_handle);
1003 rtsp_st->rtp_handle = NULL;
1006 switch(reply->transports[0].protocol) {
1007 case RTSP_PROTOCOL_RTP_TCP:
1008 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1009 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1012 case RTSP_PROTOCOL_RTP_UDP:
1016 /* XXX: also use address if specified */
1017 snprintf(url, sizeof(url), "rtp://%s:%d",
1018 host, reply->transports[0].server_port_min);
1019 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1020 err = AVERROR_INVALIDDATA;
1025 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1030 in.s_addr = htonl(reply->transports[0].destination);
1031 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1033 reply->transports[0].port_min,
1034 reply->transports[0].ttl);
1035 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1036 err = AVERROR_INVALIDDATA;
1043 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1047 if (rt->server_type == RTSP_SERVER_RDT)
1048 rt->need_subscription = 1;
1053 for (i=0; i<rt->nb_rtsp_streams; i++) {
1054 if (rt->rtsp_streams[i]->rtp_handle) {
1055 url_close(rt->rtsp_streams[i]->rtp_handle);
1056 rt->rtsp_streams[i]->rtp_handle = NULL;
1062 static int rtsp_read_header(AVFormatContext *s,
1063 AVFormatParameters *ap)
1065 RTSPState *rt = s->priv_data;
1066 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1067 URLContext *rtsp_hd;
1069 RTSPHeader reply1, *reply = &reply1;
1070 unsigned char *content = NULL;
1071 int protocol_mask = 0;
1072 char real_challenge[64];
1074 /* extract hostname and port */
1075 url_split(NULL, 0, NULL, 0,
1076 host, sizeof(host), &port, path, sizeof(path), s->filename);
1078 port = RTSP_DEFAULT_PORT;
1080 /* search for options */
1081 option_list = strchr(path, '?');
1083 /* remove the options from the path */
1085 while(option_list) {
1086 /* move the option pointer */
1087 option = option_list;
1088 option_list = strchr(option_list, '&');
1090 *(option_list++) = 0;
1091 /* handle the options */
1092 if (strcmp(option, "udp") == 0)
1093 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1094 else if (strcmp(option, "multicast") == 0)
1095 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1096 else if (strcmp(option, "tcp") == 0)
1097 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1102 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
1104 /* open the tcp connexion */
1105 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1106 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1107 return AVERROR(EIO);
1108 rt->rtsp_hd = rtsp_hd;
1111 /* request options supported by the server; this also detects server type */
1112 for (rt->server_type = RTSP_SERVER_RTP;;) {
1113 snprintf(cmd, sizeof(cmd),
1114 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1115 if (rt->server_type == RTSP_SERVER_RDT)
1118 * The following entries are required for proper
1119 * streaming from a Realmedia server. They are
1120 * interdependent in some way although we currently
1121 * don't quite understand how. Values were copied
1122 * from mplayer SVN r23589.
1123 * @param CompanyID is a 16-byte ID in base64
1124 * @param ClientChallenge is a 16-byte ID in hex
1126 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1127 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1128 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1129 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1131 rtsp_send_cmd(s, cmd, reply, NULL);
1132 if (reply->status_code != RTSP_STATUS_OK) {
1133 err = AVERROR_INVALIDDATA;
1137 /* detect server type if not standard-compliant RTP */
1138 if (rt->server_type != RTSP_SERVER_RDT && reply->real_challenge[0]) {
1139 rt->server_type = RTSP_SERVER_RDT;
1141 } else if (rt->server_type == RTSP_SERVER_RDT) {
1142 strcpy(real_challenge, reply->real_challenge);
1147 /* describe the stream */
1148 snprintf(cmd, sizeof(cmd),
1149 "DESCRIBE %s RTSP/1.0\r\n"
1150 "Accept: application/sdp\r\n",
1152 if (rt->server_type == RTSP_SERVER_RDT) {
1154 * The Require: attribute is needed for proper streaming from
1155 * Realmedia servers.
1158 "Require: com.real.retain-entity-for-setup\r\n",
1161 rtsp_send_cmd(s, cmd, reply, &content);
1163 err = AVERROR_INVALIDDATA;
1166 if (reply->status_code != RTSP_STATUS_OK) {
1167 err = AVERROR_INVALIDDATA;
1171 /* now we got the SDP description, we parse it */
1172 ret = sdp_parse(s, (const char *)content);
1175 err = AVERROR_INVALIDDATA;
1180 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
1182 err = make_setup_request(s, host, port, protocol,
1183 rt->server_type == RTSP_SERVER_RDT ?
1184 real_challenge : NULL);
1187 protocol_mask &= ~(1 << protocol);
1188 if (protocol_mask == 0 && err == 1) {
1189 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1194 rt->state = RTSP_STATE_IDLE;
1195 rt->seek_timestamp = 0; /* default is to start stream at position
1197 if (ap->initial_pause) {
1198 /* do not start immediately */
1200 if (rtsp_read_play(s) < 0) {
1201 err = AVERROR_INVALIDDATA;
1207 rtsp_close_streams(rt);
1209 url_close(rt->rtsp_hd);
1213 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1214 uint8_t *buf, int buf_size)
1216 RTSPState *rt = s->priv_data;
1217 int id, len, i, ret;
1218 RTSPStream *rtsp_st;
1220 #ifdef DEBUG_RTP_TCP
1221 printf("tcp_read_packet:\n");
1225 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1226 #ifdef DEBUG_RTP_TCP
1227 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1234 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1238 len = AV_RB16(buf + 1);
1239 #ifdef DEBUG_RTP_TCP
1240 printf("id=%d len=%d\n", id, len);
1242 if (len > buf_size || len < 12)
1245 ret = url_readbuf(rt->rtsp_hd, buf, len);
1249 /* find the matching stream */
1250 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1251 rtsp_st = rt->rtsp_streams[i];
1252 if (id >= rtsp_st->interleaved_min &&
1253 id <= rtsp_st->interleaved_max)
1258 *prtsp_st = rtsp_st;
1262 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1263 uint8_t *buf, int buf_size)
1265 RTSPState *rt = s->priv_data;
1266 RTSPStream *rtsp_st;
1268 int fd1, fd2, fd_max, n, i, ret;
1272 if (url_interrupt_cb())
1273 return AVERROR(EINTR);
1276 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1277 rtsp_st = rt->rtsp_streams[i];
1278 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1279 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1285 tv.tv_usec = 100 * 1000;
1286 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1288 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1289 rtsp_st = rt->rtsp_streams[i];
1290 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1291 if (FD_ISSET(fd1, &rfds)) {
1292 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1294 *prtsp_st = rtsp_st;
1303 static int rtsp_read_packet(AVFormatContext *s,
1306 RTSPState *rt = s->priv_data;
1307 RTSPStream *rtsp_st;
1309 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1311 if (rt->server_type == RTSP_SERVER_RDT && rt->need_subscription) {
1313 RTSPHeader reply1, *reply = &reply1;
1316 snprintf(cmd, sizeof(cmd),
1317 "SET_PARAMETER %s RTSP/1.0\r\n"
1320 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1321 if (i != 0) av_strlcat(cmd, ",", sizeof(cmd));
1322 ff_rdt_subscribe_rule(
1323 rt->rtsp_streams[i]->rtp_ctx,
1324 cmd, sizeof(cmd), i, 0);
1326 av_strlcat(cmd, "\r\n", sizeof(cmd));
1327 rtsp_send_cmd(s, cmd, reply, NULL);
1328 if (reply->status_code != RTSP_STATUS_OK)
1329 return AVERROR_INVALIDDATA;
1330 rt->need_subscription = 0;
1332 if (rt->state == RTSP_STATE_PLAYING)
1336 /* get next frames from the same RTP packet */
1338 if (rt->server_type == RTSP_SERVER_RDT)
1339 ret = ff_rdt_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1341 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1345 } else if (ret == 1) {
1352 /* read next RTP packet */
1354 switch(rt->protocol) {
1356 case RTSP_PROTOCOL_RTP_TCP:
1357 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1359 case RTSP_PROTOCOL_RTP_UDP:
1360 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1361 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1362 if (len >=0 && rtsp_st->rtp_ctx)
1363 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1368 if (rt->server_type == RTSP_SERVER_RDT)
1369 ret = ff_rdt_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1371 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1375 /* more packets may follow, so we save the RTP context */
1376 rt->cur_rtp = rtsp_st->rtp_ctx;
1381 static int rtsp_read_play(AVFormatContext *s)
1383 RTSPState *rt = s->priv_data;
1384 RTSPHeader reply1, *reply = &reply1;
1387 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1389 if (!(rt->server_type == RTSP_SERVER_RDT && rt->need_subscription)) {
1390 if (rt->state == RTSP_STATE_PAUSED) {
1391 snprintf(cmd, sizeof(cmd),
1392 "PLAY %s RTSP/1.0\r\n",
1395 snprintf(cmd, sizeof(cmd),
1396 "PLAY %s RTSP/1.0\r\n"
1397 "Range: npt=%0.3f-\r\n",
1399 (double)rt->seek_timestamp / AV_TIME_BASE);
1401 rtsp_send_cmd(s, cmd, reply, NULL);
1402 if (reply->status_code != RTSP_STATUS_OK) {
1406 rt->state = RTSP_STATE_PLAYING;
1410 /* pause the stream */
1411 static int rtsp_read_pause(AVFormatContext *s)
1413 RTSPState *rt = s->priv_data;
1414 RTSPHeader reply1, *reply = &reply1;
1419 if (rt->state != RTSP_STATE_PLAYING)
1421 else if (!(rt->server_type == RTSP_SERVER_RDT && rt->need_subscription)) {
1422 snprintf(cmd, sizeof(cmd),
1423 "PAUSE %s RTSP/1.0\r\n",
1425 rtsp_send_cmd(s, cmd, reply, NULL);
1426 if (reply->status_code != RTSP_STATUS_OK) {
1430 rt->state = RTSP_STATE_PAUSED;
1434 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1435 int64_t timestamp, int flags)
1437 RTSPState *rt = s->priv_data;
1439 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1442 case RTSP_STATE_IDLE:
1444 case RTSP_STATE_PLAYING:
1445 if (rtsp_read_play(s) != 0)
1448 case RTSP_STATE_PAUSED:
1449 rt->state = RTSP_STATE_IDLE;
1455 static int rtsp_read_close(AVFormatContext *s)
1457 RTSPState *rt = s->priv_data;
1458 RTSPHeader reply1, *reply = &reply1;
1462 /* NOTE: it is valid to flush the buffer here */
1463 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1464 url_fclose(&rt->rtsp_gb);
1467 snprintf(cmd, sizeof(cmd),
1468 "TEARDOWN %s RTSP/1.0\r\n",
1470 rtsp_send_cmd(s, cmd, reply, NULL);
1472 rtsp_close_streams(rt);
1473 url_close(rt->rtsp_hd);
1477 #ifdef CONFIG_RTSP_DEMUXER
1478 AVInputFormat rtsp_demuxer = {
1480 NULL_IF_CONFIG_SMALL("RTSP input format"),
1487 .flags = AVFMT_NOFILE,
1488 .read_play = rtsp_read_play,
1489 .read_pause = rtsp_read_pause,
1493 static int sdp_probe(AVProbeData *p1)
1495 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1497 /* we look for a line beginning "c=IN IP4" */
1498 while (p < p_end && *p != '\0') {
1499 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1500 return AVPROBE_SCORE_MAX / 2;
1502 while(p < p_end - 1 && *p != '\n') p++;
1511 #define SDP_MAX_SIZE 8192
1513 static int sdp_read_header(AVFormatContext *s,
1514 AVFormatParameters *ap)
1516 RTSPState *rt = s->priv_data;
1517 RTSPStream *rtsp_st;
1522 /* read the whole sdp file */
1523 /* XXX: better loading */
1524 content = av_malloc(SDP_MAX_SIZE);
1525 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1528 return AVERROR_INVALIDDATA;
1530 content[size] ='\0';
1532 sdp_parse(s, content);
1535 /* open each RTP stream */
1536 for(i=0;i<rt->nb_rtsp_streams;i++) {
1537 rtsp_st = rt->rtsp_streams[i];
1539 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1540 inet_ntoa(rtsp_st->sdp_ip),
1544 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1545 err = AVERROR_INVALIDDATA;
1548 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1553 rtsp_close_streams(rt);
1557 static int sdp_read_packet(AVFormatContext *s,
1560 return rtsp_read_packet(s, pkt);
1563 static int sdp_read_close(AVFormatContext *s)
1565 RTSPState *rt = s->priv_data;
1566 rtsp_close_streams(rt);
1570 #ifdef CONFIG_SDP_DEMUXER
1571 AVInputFormat sdp_demuxer = {
1573 NULL_IF_CONFIG_SMALL("SDP"),
1582 #ifdef CONFIG_REDIR_DEMUXER
1583 /* dummy redirector format (used directly in av_open_input_file now) */
1584 static int redir_probe(AVProbeData *pd)
1588 while (redir_isspace(*p))
1590 if (av_strstart(p, "http://", NULL) ||
1591 av_strstart(p, "rtsp://", NULL))
1592 return AVPROBE_SCORE_MAX;
1596 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1600 AVFormatContext *ic = NULL;
1601 ByteIOContext *f = s->pb;
1603 /* parse each URL and try to open it */
1605 while (c != URL_EOF) {
1608 if (!redir_isspace(c))
1617 if (c == URL_EOF || redir_isspace(c))
1619 if ((q - buf) < sizeof(buf) - 1)
1624 //printf("URL='%s'\n", buf);
1625 /* try to open the media file */
1626 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1630 return AVERROR(EIO);
1638 AVInputFormat redir_demuxer = {
1640 NULL_IF_CONFIG_SMALL("Redirector format"),