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/base64.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/intreadwrite.h"
32 #include <sys/select.h>
41 #include "rtp_vorbis.h"
44 //#define DEBUG_RTP_TCP
46 #if CONFIG_RTSP_DEMUXER
47 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
48 uint8_t *buf, int buf_size);
49 static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
50 unsigned char **content_ptr,
51 int return_on_interleaved_data);
54 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
55 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
58 #define SPACE_CHARS " \t\r\n"
59 /* we use memchr() instead of strchr() here because strchr() will return
60 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
61 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
62 static void skip_spaces(const char **pp)
66 while (redir_isspace(*p))
71 static void get_word_until_chars(char *buf, int buf_size,
72 const char *sep, const char **pp)
80 while (!strchr(sep, *p) && *p != '\0') {
81 if ((q - buf) < buf_size - 1)
90 static void get_word_sep(char *buf, int buf_size, const char *sep,
93 if (**pp == '/') (*pp)++;
94 get_word_until_chars(buf, buf_size, sep, pp);
97 static void get_word(char *buf, int buf_size, const char **pp)
99 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
102 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
104 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
111 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
112 see if we can handle this kind of payload */
113 get_word_sep(buf, sizeof(buf), "/", &p);
114 if (payload_type >= RTP_PT_PRIVATE) {
115 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
117 if (!strcasecmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
118 codec->codec_id = handler->codec_id;
119 rtsp_st->dynamic_handler= handler;
121 rtsp_st->dynamic_protocol_context= handler->open();
125 handler= handler->next;
128 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
129 /* search into AVRtpPayloadTypes[] */
130 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
133 c = avcodec_find_decoder(codec->codec_id);
137 c_name = (char *)NULL;
140 get_word_sep(buf, sizeof(buf), "/", &p);
142 switch (codec->codec_type) {
143 case CODEC_TYPE_AUDIO:
144 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
145 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
146 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
148 codec->sample_rate = i;
149 get_word_sep(buf, sizeof(buf), "/", &p);
153 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
154 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
156 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
157 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
159 case CODEC_TYPE_VIDEO:
160 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
171 /* return the length and optionnaly the data */
172 static int hex_to_data(uint8_t *data, const char *p)
182 c = toupper((unsigned char)*p++);
183 if (c >= '0' && c <= '9')
185 else if (c >= 'A' && c <= 'F')
200 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
201 char *attr, char *value)
203 switch (codec->codec_id) {
206 if (!strcmp(attr, "config")) {
207 /* decode the hexa encoded parameter */
208 int len = hex_to_data(NULL, value);
209 if (codec->extradata)
210 av_free(codec->extradata);
211 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
212 if (!codec->extradata)
214 codec->extradata_size = len;
215 hex_to_data(codec->extradata, value);
218 case CODEC_ID_VORBIS:
219 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
233 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
234 #define ATTR_NAME_TYPE_INT 0
235 #define ATTR_NAME_TYPE_STR 1
236 static const AttrNameMap attr_names[]=
238 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
239 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
240 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
241 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
242 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
243 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
247 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
248 * because it is used in rtp_h264.c, which is forthcoming.
250 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
254 get_word_sep(attr, attr_size, "=", p);
257 get_word_sep(value, value_size, ";", p);
265 /* parse a SDP line and save stream attributes */
266 static void sdp_parse_fmtp(AVStream *st, const char *p)
269 /* Vorbis setup headers can be up to 12KB and are sent base64
270 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
274 RTSPStream *rtsp_st = st->priv_data;
275 AVCodecContext *codec = st->codec;
276 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
278 /* loop on each attribute */
279 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
281 /* grab the codec extra_data from the config parameter of the fmtp line */
282 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
284 /* Looking for a known attribute */
285 for (i = 0; attr_names[i].str; ++i) {
286 if (!strcasecmp(attr, attr_names[i].str)) {
287 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
288 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
289 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
290 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
296 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
298 * Used for seeking in the rtp stream.
300 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
305 if (!av_stristart(p, "npt=", &p))
308 *start = AV_NOPTS_VALUE;
309 *end = AV_NOPTS_VALUE;
311 get_word_sep(buf, sizeof(buf), "-", &p);
312 *start = parse_date(buf, 1);
315 get_word_sep(buf, sizeof(buf), "-", &p);
316 *end = parse_date(buf, 1);
318 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
319 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
322 typedef struct SDPParseState {
324 struct in_addr default_ip;
326 int skip_media; ///< set if an unknown m= line occurs
329 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
330 int letter, const char *buf)
332 RTSPState *rt = s->priv_data;
333 char buf1[64], st_type[64];
335 enum CodecType codec_type;
339 struct in_addr sdp_ip;
342 dprintf(s, "sdp: %c='%s'\n", letter, buf);
345 if (s1->skip_media && letter != 'm')
349 get_word(buf1, sizeof(buf1), &p);
350 if (strcmp(buf1, "IN") != 0)
352 get_word(buf1, sizeof(buf1), &p);
353 if (strcmp(buf1, "IP4") != 0)
355 get_word_sep(buf1, sizeof(buf1), "/", &p);
356 if (inet_aton(buf1, &sdp_ip) == 0)
361 get_word_sep(buf1, sizeof(buf1), "/", &p);
364 if (s->nb_streams == 0) {
365 s1->default_ip = sdp_ip;
366 s1->default_ttl = ttl;
368 st = s->streams[s->nb_streams - 1];
369 rtsp_st = st->priv_data;
370 rtsp_st->sdp_ip = sdp_ip;
371 rtsp_st->sdp_ttl = ttl;
375 av_metadata_set(&s->metadata, "title", p);
378 if (s->nb_streams == 0) {
379 av_metadata_set(&s->metadata, "comment", p);
386 get_word(st_type, sizeof(st_type), &p);
387 if (!strcmp(st_type, "audio")) {
388 codec_type = CODEC_TYPE_AUDIO;
389 } else if (!strcmp(st_type, "video")) {
390 codec_type = CODEC_TYPE_VIDEO;
391 } else if (!strcmp(st_type, "application")) {
392 codec_type = CODEC_TYPE_DATA;
397 rtsp_st = av_mallocz(sizeof(RTSPStream));
400 rtsp_st->stream_index = -1;
401 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
403 rtsp_st->sdp_ip = s1->default_ip;
404 rtsp_st->sdp_ttl = s1->default_ttl;
406 get_word(buf1, sizeof(buf1), &p); /* port */
407 rtsp_st->sdp_port = atoi(buf1);
409 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
411 /* XXX: handle list of formats */
412 get_word(buf1, sizeof(buf1), &p); /* format list */
413 rtsp_st->sdp_payload_type = atoi(buf1);
415 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
416 /* no corresponding stream */
418 st = av_new_stream(s, 0);
421 st->priv_data = rtsp_st;
422 rtsp_st->stream_index = st->index;
423 st->codec->codec_type = codec_type;
424 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
425 /* if standard payload type, we can find the codec right now */
426 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
429 /* put a default control url */
430 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
433 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
435 /* get the control url */
436 st = s->streams[s->nb_streams - 1];
437 rtsp_st = st->priv_data;
439 /* XXX: may need to add full url resolution */
440 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
441 if (proto[0] == '\0') {
442 /* relative control URL */
443 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
444 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
446 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
448 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
449 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
450 get_word(buf1, sizeof(buf1), &p);
451 payload_type = atoi(buf1);
452 st = s->streams[s->nb_streams - 1];
453 rtsp_st = st->priv_data;
454 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
455 } else if (av_strstart(p, "fmtp:", &p)) {
456 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
457 get_word(buf1, sizeof(buf1), &p);
458 payload_type = atoi(buf1);
459 for(i = 0; i < s->nb_streams;i++) {
461 rtsp_st = st->priv_data;
462 if (rtsp_st->sdp_payload_type == payload_type) {
463 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
464 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
465 sdp_parse_fmtp(st, p);
468 sdp_parse_fmtp(st, p);
472 } else if(av_strstart(p, "framesize:", &p)) {
473 // let dynamic protocol handlers have a stab at the line.
474 get_word(buf1, sizeof(buf1), &p);
475 payload_type = atoi(buf1);
476 for(i = 0; i < s->nb_streams;i++) {
478 rtsp_st = st->priv_data;
479 if (rtsp_st->sdp_payload_type == payload_type) {
480 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
481 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
485 } else if(av_strstart(p, "range:", &p)) {
488 // this is so that seeking on a streamed file can work.
489 rtsp_parse_range_npt(p, &start, &end);
490 s->start_time= start;
491 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
492 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
494 rt->transport = RTSP_TRANSPORT_RDT;
496 if (rt->server_type == RTSP_SERVER_WMS)
497 ff_wms_parse_sdp_a_line(s, p);
498 if (s->nb_streams > 0) {
499 if (rt->server_type == RTSP_SERVER_REAL)
500 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
502 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
503 if (rtsp_st->dynamic_handler &&
504 rtsp_st->dynamic_handler->parse_sdp_a_line)
505 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
506 rtsp_st->dynamic_protocol_context, buf);
513 static int sdp_parse(AVFormatContext *s, const char *content)
517 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
518 * contain long SDP lines containing complete ASF Headers (several
519 * kB) or arrays of MDPR (RM stream descriptor) headers plus
520 * "rulebooks" describing their properties. Therefore, the SDP line
523 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
525 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
527 memset(s1, 0, sizeof(SDPParseState));
538 /* get the content */
540 while (*p != '\n' && *p != '\r' && *p != '\0') {
541 if ((q - buf) < sizeof(buf) - 1)
546 sdp_parse_line(s, s1, letter, buf);
548 while (*p != '\n' && *p != '\0')
556 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
557 uint8_t *buf, int buf_size)
559 RTSPState *rt = s->priv_data;
562 int fd, fd_max, n, i, ret, tcp_fd;
566 if (url_interrupt_cb())
567 return AVERROR(EINTR);
570 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
571 FD_SET(tcp_fd, &rfds);
576 for(i = 0; i < rt->nb_rtsp_streams; i++) {
577 rtsp_st = rt->rtsp_streams[i];
578 if (rtsp_st->rtp_handle) {
579 /* currently, we cannot probe RTCP handle because of
580 * blocking restrictions */
581 fd = url_get_file_handle(rtsp_st->rtp_handle);
588 tv.tv_usec = 100 * 1000;
589 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
591 for(i = 0; i < rt->nb_rtsp_streams; i++) {
592 rtsp_st = rt->rtsp_streams[i];
593 if (rtsp_st->rtp_handle) {
594 fd = url_get_file_handle(rtsp_st->rtp_handle);
595 if (FD_ISSET(fd, &rfds)) {
596 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
604 #if CONFIG_RTSP_DEMUXER
605 if (FD_ISSET(tcp_fd, &rfds)) {
606 RTSPMessageHeader reply;
608 rtsp_read_reply(s, &reply, NULL, 0);
609 /* XXX: parse message */
610 if (rt->state != RTSP_STATE_PLAYING)
618 static int sdp_read_packet(AVFormatContext *s, AVPacket *pkt)
620 RTSPState *rt = s->priv_data;
622 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
625 /* get next frames from the same RTP packet */
626 if (rt->cur_transport_priv) {
627 if (rt->transport == RTSP_TRANSPORT_RDT)
628 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
630 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
632 rt->cur_transport_priv = NULL;
634 } else if (ret == 1) {
637 rt->cur_transport_priv = NULL;
641 /* read next RTP packet */
643 switch(rt->lower_transport) {
645 #if CONFIG_RTSP_DEMUXER
646 case RTSP_LOWER_TRANSPORT_TCP:
647 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
650 case RTSP_LOWER_TRANSPORT_UDP:
651 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
652 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
653 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
654 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
661 if (rt->transport == RTSP_TRANSPORT_RDT)
662 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
664 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
668 /* more packets may follow, so we save the RTP context */
669 rt->cur_transport_priv = rtsp_st->transport_priv;
675 /* close and free RTSP streams */
676 static void rtsp_close_streams(RTSPState *rt)
681 for(i=0;i<rt->nb_rtsp_streams;i++) {
682 rtsp_st = rt->rtsp_streams[i];
684 if (rtsp_st->transport_priv) {
685 if (rt->transport == RTSP_TRANSPORT_RDT)
686 ff_rdt_parse_close(rtsp_st->transport_priv);
688 rtp_parse_close(rtsp_st->transport_priv);
690 if (rtsp_st->rtp_handle)
691 url_close(rtsp_st->rtp_handle);
692 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
693 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
696 av_free(rt->rtsp_streams);
698 av_close_input_stream (rt->asf_ctx);
701 av_freep(&rt->auth_b64);
705 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
707 RTSPState *rt = s->priv_data;
710 /* open the RTP context */
711 if (rtsp_st->stream_index >= 0)
712 st = s->streams[rtsp_st->stream_index];
714 s->ctx_flags |= AVFMTCTX_NOHEADER;
716 if (rt->transport == RTSP_TRANSPORT_RDT)
717 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
718 rtsp_st->dynamic_protocol_context,
719 rtsp_st->dynamic_handler);
721 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
722 rtsp_st->sdp_payload_type,
723 &rtsp_st->rtp_payload_data);
725 if (!rtsp_st->transport_priv) {
726 return AVERROR(ENOMEM);
727 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
728 if(rtsp_st->dynamic_handler) {
729 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
730 rtsp_st->dynamic_protocol_context,
731 rtsp_st->dynamic_handler);
738 #if CONFIG_RTSP_DEMUXER
739 static int rtsp_probe(AVProbeData *p)
741 if (av_strstart(p->filename, "rtsp:", NULL))
742 return AVPROBE_SCORE_MAX;
746 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
753 v = strtol(p, (char **)&p, 10);
757 v = strtol(p, (char **)&p, 10);
766 /* XXX: only one transport specification is parsed */
767 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
769 char transport_protocol[16];
771 char lower_transport[16];
773 RTSPTransportField *th;
776 reply->nb_transports = 0;
783 th = &reply->transports[reply->nb_transports];
785 get_word_sep(transport_protocol, sizeof(transport_protocol),
787 if (!strcasecmp (transport_protocol, "rtp")) {
788 get_word_sep(profile, sizeof(profile), "/;,", &p);
789 lower_transport[0] = '\0';
790 /* rtp/avp/<protocol> */
792 get_word_sep(lower_transport, sizeof(lower_transport),
795 th->transport = RTSP_TRANSPORT_RTP;
796 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
797 !strcasecmp (transport_protocol, "x-real-rdt")) {
798 /* x-pn-tng/<protocol> */
799 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
801 th->transport = RTSP_TRANSPORT_RDT;
803 if (!strcasecmp(lower_transport, "TCP"))
804 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
806 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
810 /* get each parameter */
811 while (*p != '\0' && *p != ',') {
812 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
813 if (!strcmp(parameter, "port")) {
816 rtsp_parse_range(&th->port_min, &th->port_max, &p);
818 } else if (!strcmp(parameter, "client_port")) {
821 rtsp_parse_range(&th->client_port_min,
822 &th->client_port_max, &p);
824 } else if (!strcmp(parameter, "server_port")) {
827 rtsp_parse_range(&th->server_port_min,
828 &th->server_port_max, &p);
830 } else if (!strcmp(parameter, "interleaved")) {
833 rtsp_parse_range(&th->interleaved_min,
834 &th->interleaved_max, &p);
836 } else if (!strcmp(parameter, "multicast")) {
837 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
838 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
839 } else if (!strcmp(parameter, "ttl")) {
842 th->ttl = strtol(p, (char **)&p, 10);
844 } else if (!strcmp(parameter, "destination")) {
845 struct in_addr ipaddr;
849 get_word_sep(buf, sizeof(buf), ";,", &p);
850 if (inet_aton(buf, &ipaddr))
851 th->destination = ntohl(ipaddr.s_addr);
854 while (*p != ';' && *p != '\0' && *p != ',')
862 reply->nb_transports++;
866 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
870 /* NOTE: we do case independent match for broken servers */
872 if (av_stristart(p, "Session:", &p)) {
874 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
875 if (av_stristart(p, ";timeout=", &p) &&
876 (t = strtol(p, NULL, 10)) > 0) {
879 } else if (av_stristart(p, "Content-Length:", &p)) {
880 reply->content_length = strtol(p, NULL, 10);
881 } else if (av_stristart(p, "Transport:", &p)) {
882 rtsp_parse_transport(reply, p);
883 } else if (av_stristart(p, "CSeq:", &p)) {
884 reply->seq = strtol(p, NULL, 10);
885 } else if (av_stristart(p, "Range:", &p)) {
886 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
887 } else if (av_stristart(p, "RealChallenge1:", &p)) {
889 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
890 } else if (av_stristart(p, "Server:", &p)) {
892 av_strlcpy(reply->server, p, sizeof(reply->server));
893 } else if (av_stristart(p, "Notice:", &p) ||
894 av_stristart(p, "X-Notice:", &p)) {
895 reply->notice = strtol(p, NULL, 10);
896 } else if (av_stristart(p, "Location:", &p)) {
898 av_strlcpy(reply->location, p , sizeof(reply->location));
902 /* skip a RTP/TCP interleaved packet */
903 static void rtsp_skip_packet(AVFormatContext *s)
905 RTSPState *rt = s->priv_data;
909 ret = url_read_complete(rt->rtsp_hd, buf, 3);
912 len = AV_RB16(buf + 1);
914 dprintf(s, "skipping RTP packet len=%d\n", len);
919 if (len1 > sizeof(buf))
921 ret = url_read_complete(rt->rtsp_hd, buf, len1);
929 * Read a RTSP message from the server, or prepare to read data
930 * packets if we're reading data interleaved over the TCP/RTSP
931 * connection as well.
933 * @param s RTSP demuxer context
934 * @param reply pointer where the RTSP message header will be stored
935 * @param content_ptr pointer where the RTSP message body, if any, will
936 * be stored (length is in \p reply)
937 * @param return_on_interleaved_data whether the function may return if we
938 * encounter a data marker ('$'), which precedes data
939 * packets over interleaved TCP/RTSP connections. If this
940 * is set, this function will return 1 after encountering
941 * a '$'. If it is not set, the function will skip any
942 * data packets (if they are encountered), until a reply
943 * has been fully parsed. If no more data is available
944 * without parsing a reply, it will return an error.
946 * @returns 1 if a data packets is ready to be received, -1 on error,
950 rtsp_read_reply (AVFormatContext *s, RTSPMessageHeader *reply,
951 unsigned char **content_ptr, int return_on_interleaved_data)
953 RTSPState *rt = s->priv_data;
954 char buf[4096], buf1[1024], *q;
957 int ret, content_length, line_count = 0;
958 unsigned char *content = NULL;
960 memset(reply, 0, sizeof(*reply));
962 /* parse reply (XXX: use buffers) */
963 rt->last_reply[0] = '\0';
967 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
969 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
976 /* XXX: only parse it if first char on line ? */
977 if (return_on_interleaved_data) {
981 } else if (ch != '\r') {
982 if ((q - buf) < sizeof(buf) - 1)
988 dprintf(s, "line='%s'\n", buf);
990 /* test if last line */
994 if (line_count == 0) {
996 get_word(buf1, sizeof(buf1), &p);
997 get_word(buf1, sizeof(buf1), &p);
998 reply->status_code = atoi(buf1);
1000 rtsp_parse_line(reply, p);
1001 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
1002 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
1007 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
1008 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
1010 content_length = reply->content_length;
1011 if (content_length > 0) {
1012 /* leave some room for a trailing '\0' (useful for simple parsing) */
1013 content = av_malloc(content_length + 1);
1014 (void)url_read_complete(rt->rtsp_hd, content, content_length);
1015 content[content_length] = '\0';
1018 *content_ptr = content;
1023 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
1024 reply->notice == 2104 /* Start-of-Stream Reached */ ||
1025 reply->notice == 2306 /* Continuous Feed Terminated */)
1026 rt->state = RTSP_STATE_IDLE;
1027 else if (reply->notice >= 4400 && reply->notice < 5500)
1028 return AVERROR(EIO); /* data or server error */
1029 else if (reply->notice == 2401 /* Ticket Expired */ ||
1030 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
1031 return AVERROR(EPERM);
1036 static void rtsp_send_cmd_async (AVFormatContext *s,
1037 const char *cmd, RTSPMessageHeader *reply,
1038 unsigned char **content_ptr)
1040 RTSPState *rt = s->priv_data;
1041 char buf[4096], buf1[1024];
1044 av_strlcpy(buf, cmd, sizeof(buf));
1045 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
1046 av_strlcat(buf, buf1, sizeof(buf));
1047 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
1048 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
1049 av_strlcat(buf, buf1, sizeof(buf));
1052 av_strlcatf(buf, sizeof(buf),
1053 "Authorization: Basic %s\r\n",
1055 av_strlcat(buf, "\r\n", sizeof(buf));
1057 dprintf(s, "Sending:\n%s--\n", buf);
1059 url_write(rt->rtsp_hd, buf, strlen(buf));
1060 rt->last_cmd_time = av_gettime();
1063 static void rtsp_send_cmd (AVFormatContext *s,
1064 const char *cmd, RTSPMessageHeader *reply,
1065 unsigned char **content_ptr)
1067 rtsp_send_cmd_async(s, cmd, reply, content_ptr);
1069 rtsp_read_reply(s, reply, content_ptr, 0);
1073 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
1076 make_setup_request (AVFormatContext *s, const char *host, int port,
1077 int lower_transport, const char *real_challenge)
1079 RTSPState *rt = s->priv_data;
1080 int rtx, j, i, err, interleave = 0;
1081 RTSPStream *rtsp_st;
1082 RTSPMessageHeader reply1, *reply = &reply1;
1084 const char *trans_pref;
1086 if (rt->transport == RTSP_TRANSPORT_RDT)
1087 trans_pref = "x-pn-tng";
1089 trans_pref = "RTP/AVP";
1091 /* default timeout: 1 minute */
1094 /* for each stream, make the setup request */
1095 /* XXX: we assume the same server is used for the control of each
1098 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
1099 char transport[2048];
1102 * WMS serves all UDP data over a single connection, the RTX, which
1103 * isn't necessarily the first in the SDP but has to be the first
1104 * to be set up, else the second/third SETUP will fail with a 461.
1106 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1107 rt->server_type == RTSP_SERVER_WMS) {
1110 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1111 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1113 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4, "/rtx"))
1116 if (rtx == rt->nb_rtsp_streams)
1117 return -1; /* no RTX found */
1118 rtsp_st = rt->rtsp_streams[rtx];
1120 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1122 rtsp_st = rt->rtsp_streams[i];
1125 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1128 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1129 port = reply->transports[0].client_port_min;
1133 /* first try in specified port range */
1134 if (RTSP_RTP_PORT_MIN != 0) {
1135 while(j <= RTSP_RTP_PORT_MAX) {
1136 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
1137 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
1138 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
1144 /* then try on any port
1145 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1146 ** err = AVERROR_INVALIDDATA;
1152 port = rtp_get_local_port(rtsp_st->rtp_handle);
1154 snprintf(transport, sizeof(transport) - 1,
1155 "%s/UDP;", trans_pref);
1156 if (rt->server_type != RTSP_SERVER_REAL)
1157 av_strlcat(transport, "unicast;", sizeof(transport));
1158 av_strlcatf(transport, sizeof(transport),
1159 "client_port=%d", port);
1160 if (rt->transport == RTSP_TRANSPORT_RTP &&
1161 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1162 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1166 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1167 /** For WMS streams, the application streams are only used for
1168 * UDP. When trying to set it up for TCP streams, the server
1169 * will return an error. Therefore, we skip those streams. */
1170 if (rt->server_type == RTSP_SERVER_WMS &&
1171 s->streams[rtsp_st->stream_index]->codec->codec_type == CODEC_TYPE_DATA)
1173 snprintf(transport, sizeof(transport) - 1,
1174 "%s/TCP;", trans_pref);
1175 if (rt->server_type == RTSP_SERVER_WMS)
1176 av_strlcat(transport, "unicast;", sizeof(transport));
1177 av_strlcatf(transport, sizeof(transport),
1178 "interleaved=%d-%d",
1179 interleave, interleave + 1);
1183 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1184 snprintf(transport, sizeof(transport) - 1,
1185 "%s/UDP;multicast", trans_pref);
1187 if (rt->server_type == RTSP_SERVER_REAL ||
1188 rt->server_type == RTSP_SERVER_WMS)
1189 av_strlcat(transport, ";mode=play", sizeof(transport));
1190 snprintf(cmd, sizeof(cmd),
1191 "SETUP %s RTSP/1.0\r\n"
1192 "Transport: %s\r\n",
1193 rtsp_st->control_url, transport);
1194 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1195 char real_res[41], real_csum[9];
1196 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1198 av_strlcatf(cmd, sizeof(cmd),
1200 "RealChallenge2: %s, sd=%s\r\n",
1201 rt->session_id, real_res, real_csum);
1203 rtsp_send_cmd(s, cmd, reply, NULL);
1204 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1207 } else if (reply->status_code != RTSP_STATUS_OK ||
1208 reply->nb_transports != 1) {
1209 err = AVERROR_INVALIDDATA;
1213 /* XXX: same protocol for all streams is required */
1215 if (reply->transports[0].lower_transport != rt->lower_transport ||
1216 reply->transports[0].transport != rt->transport) {
1217 err = AVERROR_INVALIDDATA;
1221 rt->lower_transport = reply->transports[0].lower_transport;
1222 rt->transport = reply->transports[0].transport;
1225 /* close RTP connection if not choosen */
1226 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1227 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1228 url_close(rtsp_st->rtp_handle);
1229 rtsp_st->rtp_handle = NULL;
1232 switch(reply->transports[0].lower_transport) {
1233 case RTSP_LOWER_TRANSPORT_TCP:
1234 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1235 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1238 case RTSP_LOWER_TRANSPORT_UDP:
1242 /* XXX: also use address if specified */
1243 snprintf(url, sizeof(url), "rtp://%s:%d",
1244 host, reply->transports[0].server_port_min);
1245 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1246 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1247 err = AVERROR_INVALIDDATA;
1252 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1258 if (reply->transports[0].destination) {
1259 in.s_addr = htonl(reply->transports[0].destination);
1260 port = reply->transports[0].port_min;
1261 ttl = reply->transports[0].ttl;
1263 in = rtsp_st->sdp_ip;
1264 port = rtsp_st->sdp_port;
1265 ttl = rtsp_st->sdp_ttl;
1267 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1268 inet_ntoa(in), port, ttl);
1269 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1270 err = AVERROR_INVALIDDATA;
1277 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1281 if (reply->timeout > 0)
1282 rt->timeout = reply->timeout;
1284 if (rt->server_type == RTSP_SERVER_REAL)
1285 rt->need_subscription = 1;
1290 for (i=0; i<rt->nb_rtsp_streams; i++) {
1291 if (rt->rtsp_streams[i]->rtp_handle) {
1292 url_close(rt->rtsp_streams[i]->rtp_handle);
1293 rt->rtsp_streams[i]->rtp_handle = NULL;
1299 static int rtsp_read_play(AVFormatContext *s)
1301 RTSPState *rt = s->priv_data;
1302 RTSPMessageHeader reply1, *reply = &reply1;
1305 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1307 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1308 if (rt->state == RTSP_STATE_PAUSED) {
1309 snprintf(cmd, sizeof(cmd),
1310 "PLAY %s RTSP/1.0\r\n",
1313 snprintf(cmd, sizeof(cmd),
1314 "PLAY %s RTSP/1.0\r\n"
1315 "Range: npt=%0.3f-\r\n",
1317 (double)rt->seek_timestamp / AV_TIME_BASE);
1319 rtsp_send_cmd(s, cmd, reply, NULL);
1320 if (reply->status_code != RTSP_STATUS_OK) {
1324 rt->state = RTSP_STATE_PLAYING;
1328 static int rtsp_read_header(AVFormatContext *s,
1329 AVFormatParameters *ap)
1331 RTSPState *rt = s->priv_data;
1332 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1333 char *option_list, *option, *filename;
1334 URLContext *rtsp_hd;
1336 RTSPMessageHeader reply1, *reply = &reply1;
1337 unsigned char *content = NULL;
1338 int lower_transport_mask = 0;
1339 char real_challenge[64];
1341 /* extract hostname and port */
1342 url_split(NULL, 0, auth, sizeof(auth),
1343 host, sizeof(host), &port, path, sizeof(path), s->filename);
1345 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1347 if (!(rt->auth_b64 = av_malloc(b64_len)))
1348 return AVERROR(ENOMEM);
1349 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1350 err = AVERROR(EINVAL);
1355 port = RTSP_DEFAULT_PORT;
1357 /* search for options */
1358 option_list = strchr(path, '?');
1360 filename = strchr(s->filename, '?');
1361 while(option_list) {
1362 /* move the option pointer */
1363 option = ++option_list;
1364 option_list = strchr(option_list, '&');
1368 /* handle the options */
1369 if (strcmp(option, "udp") == 0)
1370 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1371 else if (strcmp(option, "multicast") == 0)
1372 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1373 else if (strcmp(option, "tcp") == 0)
1374 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1376 strcpy(++filename, option);
1377 filename += strlen(option);
1378 if (option_list) *filename = '&';
1384 if (!lower_transport_mask)
1385 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1387 /* open the tcp connexion */
1388 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1389 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1393 rt->rtsp_hd = rtsp_hd;
1396 /* request options supported by the server; this also detects server type */
1397 for (rt->server_type = RTSP_SERVER_RTP;;) {
1398 snprintf(cmd, sizeof(cmd),
1399 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1400 if (rt->server_type == RTSP_SERVER_REAL)
1403 * The following entries are required for proper
1404 * streaming from a Realmedia server. They are
1405 * interdependent in some way although we currently
1406 * don't quite understand how. Values were copied
1407 * from mplayer SVN r23589.
1408 * @param CompanyID is a 16-byte ID in base64
1409 * @param ClientChallenge is a 16-byte ID in hex
1411 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1412 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1413 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1414 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1416 rtsp_send_cmd(s, cmd, reply, NULL);
1417 if (reply->status_code != RTSP_STATUS_OK) {
1418 err = AVERROR_INVALIDDATA;
1422 /* detect server type if not standard-compliant RTP */
1423 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1424 rt->server_type = RTSP_SERVER_REAL;
1426 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1427 rt->server_type = RTSP_SERVER_WMS;
1428 } else if (rt->server_type == RTSP_SERVER_REAL) {
1429 strcpy(real_challenge, reply->real_challenge);
1434 /* describe the stream */
1435 snprintf(cmd, sizeof(cmd),
1436 "DESCRIBE %s RTSP/1.0\r\n"
1437 "Accept: application/sdp\r\n",
1439 if (rt->server_type == RTSP_SERVER_REAL) {
1441 * The Require: attribute is needed for proper streaming from
1442 * Realmedia servers.
1445 "Require: com.real.retain-entity-for-setup\r\n",
1448 rtsp_send_cmd(s, cmd, reply, &content);
1450 err = AVERROR_INVALIDDATA;
1453 if (reply->status_code != RTSP_STATUS_OK) {
1454 err = AVERROR_INVALIDDATA;
1458 /* now we got the SDP description, we parse it */
1459 ret = sdp_parse(s, (const char *)content);
1462 err = AVERROR_INVALIDDATA;
1467 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1469 err = make_setup_request(s, host, port, lower_transport,
1470 rt->server_type == RTSP_SERVER_REAL ?
1471 real_challenge : NULL);
1474 lower_transport_mask &= ~(1 << lower_transport);
1475 if (lower_transport_mask == 0 && err == 1) {
1476 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1481 rt->state = RTSP_STATE_IDLE;
1482 rt->seek_timestamp = 0; /* default is to start stream at position
1484 if (ap->initial_pause) {
1485 /* do not start immediately */
1487 if (rtsp_read_play(s) < 0) {
1488 err = AVERROR_INVALIDDATA;
1494 rtsp_close_streams(rt);
1496 url_close(rt->rtsp_hd);
1497 if (reply->status_code >=300 && reply->status_code < 400) {
1498 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1499 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1507 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1508 uint8_t *buf, int buf_size)
1510 RTSPState *rt = s->priv_data;
1511 int id, len, i, ret;
1512 RTSPStream *rtsp_st;
1514 #ifdef DEBUG_RTP_TCP
1515 dprintf(s, "tcp_read_packet:\n");
1519 RTSPMessageHeader reply;
1521 ret = rtsp_read_reply(s, &reply, NULL, 1);
1524 if (ret == 1) /* received '$' */
1526 /* XXX: parse message */
1527 if (rt->state != RTSP_STATE_PLAYING)
1530 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1534 len = AV_RB16(buf + 1);
1535 #ifdef DEBUG_RTP_TCP
1536 dprintf(s, "id=%d len=%d\n", id, len);
1538 if (len > buf_size || len < 12)
1541 ret = url_read_complete(rt->rtsp_hd, buf, len);
1544 if (rt->transport == RTSP_TRANSPORT_RDT &&
1545 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1548 /* find the matching stream */
1549 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1550 rtsp_st = rt->rtsp_streams[i];
1551 if (id >= rtsp_st->interleaved_min &&
1552 id <= rtsp_st->interleaved_max)
1557 *prtsp_st = rtsp_st;
1561 static int rtsp_read_packet(AVFormatContext *s,
1564 RTSPState *rt = s->priv_data;
1566 RTSPMessageHeader reply1, *reply = &reply1;
1569 if (rt->server_type == RTSP_SERVER_REAL) {
1571 enum AVDiscard cache[MAX_STREAMS];
1573 for (i = 0; i < s->nb_streams; i++)
1574 cache[i] = s->streams[i]->discard;
1576 if (!rt->need_subscription) {
1577 if (memcmp (cache, rt->real_setup_cache,
1578 sizeof(enum AVDiscard) * s->nb_streams)) {
1579 av_strlcatf(cmd, sizeof(cmd),
1580 "SET_PARAMETER %s RTSP/1.0\r\n"
1581 "Unsubscribe: %s\r\n",
1582 s->filename, rt->last_subscription);
1583 rtsp_send_cmd(s, cmd, reply, NULL);
1584 if (reply->status_code != RTSP_STATUS_OK)
1585 return AVERROR_INVALIDDATA;
1586 rt->need_subscription = 1;
1590 if (rt->need_subscription) {
1591 int r, rule_nr, first = 1;
1593 memcpy(rt->real_setup_cache, cache,
1594 sizeof(enum AVDiscard) * s->nb_streams);
1595 rt->last_subscription[0] = 0;
1597 snprintf(cmd, sizeof(cmd),
1598 "SET_PARAMETER %s RTSP/1.0\r\n"
1601 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1603 for (r = 0; r < s->nb_streams; r++) {
1604 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1605 if (s->streams[r]->discard != AVDISCARD_ALL) {
1607 av_strlcat(rt->last_subscription, ",",
1608 sizeof(rt->last_subscription));
1609 ff_rdt_subscribe_rule(
1610 rt->last_subscription,
1611 sizeof(rt->last_subscription), i, rule_nr);
1618 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1619 rtsp_send_cmd(s, cmd, reply, NULL);
1620 if (reply->status_code != RTSP_STATUS_OK)
1621 return AVERROR_INVALIDDATA;
1622 rt->need_subscription = 0;
1624 if (rt->state == RTSP_STATE_PLAYING)
1629 ret = sdp_read_packet(s, pkt);
1634 /* send dummy request to keep TCP connection alive */
1635 if ((rt->server_type == RTSP_SERVER_WMS ||
1636 rt->server_type == RTSP_SERVER_REAL) &&
1637 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1638 if (rt->server_type == RTSP_SERVER_WMS) {
1639 snprintf(cmd, sizeof(cmd) - 1,
1640 "GET_PARAMETER %s RTSP/1.0\r\n",
1642 rtsp_send_cmd_async(s, cmd, reply, NULL);
1644 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n",
1652 /* pause the stream */
1653 static int rtsp_read_pause(AVFormatContext *s)
1655 RTSPState *rt = s->priv_data;
1656 RTSPMessageHeader reply1, *reply = &reply1;
1661 if (rt->state != RTSP_STATE_PLAYING)
1663 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1664 snprintf(cmd, sizeof(cmd),
1665 "PAUSE %s RTSP/1.0\r\n",
1667 rtsp_send_cmd(s, cmd, reply, NULL);
1668 if (reply->status_code != RTSP_STATUS_OK) {
1672 rt->state = RTSP_STATE_PAUSED;
1676 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1677 int64_t timestamp, int flags)
1679 RTSPState *rt = s->priv_data;
1681 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1684 case RTSP_STATE_IDLE:
1686 case RTSP_STATE_PLAYING:
1687 if (rtsp_read_pause(s) != 0)
1689 rt->state = RTSP_STATE_SEEKING;
1690 if (rtsp_read_play(s) != 0)
1693 case RTSP_STATE_PAUSED:
1694 rt->state = RTSP_STATE_IDLE;
1700 static int rtsp_read_close(AVFormatContext *s)
1702 RTSPState *rt = s->priv_data;
1703 RTSPMessageHeader reply1, *reply = &reply1;
1707 /* NOTE: it is valid to flush the buffer here */
1708 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1709 url_fclose(&rt->rtsp_gb);
1712 snprintf(cmd, sizeof(cmd),
1713 "TEARDOWN %s RTSP/1.0\r\n",
1715 rtsp_send_cmd(s, cmd, reply, NULL);
1717 rtsp_close_streams(rt);
1718 url_close(rt->rtsp_hd);
1722 AVInputFormat rtsp_demuxer = {
1724 NULL_IF_CONFIG_SMALL("RTSP input format"),
1731 .flags = AVFMT_NOFILE,
1732 .read_play = rtsp_read_play,
1733 .read_pause = rtsp_read_pause,
1737 static int sdp_probe(AVProbeData *p1)
1739 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1741 /* we look for a line beginning "c=IN IP4" */
1742 while (p < p_end && *p != '\0') {
1743 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1744 return AVPROBE_SCORE_MAX / 2;
1746 while(p < p_end - 1 && *p != '\n') p++;
1755 #define SDP_MAX_SIZE 8192
1757 static int sdp_read_header(AVFormatContext *s,
1758 AVFormatParameters *ap)
1760 RTSPState *rt = s->priv_data;
1761 RTSPStream *rtsp_st;
1766 /* read the whole sdp file */
1767 /* XXX: better loading */
1768 content = av_malloc(SDP_MAX_SIZE);
1769 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1772 return AVERROR_INVALIDDATA;
1774 content[size] ='\0';
1776 sdp_parse(s, content);
1779 /* open each RTP stream */
1780 for(i=0;i<rt->nb_rtsp_streams;i++) {
1781 rtsp_st = rt->rtsp_streams[i];
1783 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1784 inet_ntoa(rtsp_st->sdp_ip),
1788 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1789 err = AVERROR_INVALIDDATA;
1792 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1797 rtsp_close_streams(rt);
1801 static int sdp_read_close(AVFormatContext *s)
1803 RTSPState *rt = s->priv_data;
1804 rtsp_close_streams(rt);
1808 AVInputFormat sdp_demuxer = {
1810 NULL_IF_CONFIG_SMALL("SDP"),