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 LIBAVFORMAT_VERSION_INT < (53 << 16)
47 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
50 #define SPACE_CHARS " \t\r\n"
51 /* we use memchr() instead of strchr() here because strchr() will return
52 * the terminating '\0' of SPACE_CHARS instead of NULL if c is '\0'. */
53 #define redir_isspace(c) memchr(SPACE_CHARS, c, 4)
54 static void skip_spaces(const char **pp)
58 while (redir_isspace(*p))
63 static void get_word_until_chars(char *buf, int buf_size,
64 const char *sep, const char **pp)
72 while (!strchr(sep, *p) && *p != '\0') {
73 if ((q - buf) < buf_size - 1)
82 static void get_word_sep(char *buf, int buf_size, const char *sep,
85 if (**pp == '/') (*pp)++;
86 get_word_until_chars(buf, buf_size, sep, pp);
89 static void get_word(char *buf, int buf_size, const char **pp)
91 get_word_until_chars(buf, buf_size, SPACE_CHARS, pp);
94 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other params>] */
95 static int sdp_parse_rtpmap(AVFormatContext *s,
96 AVCodecContext *codec, RTSPStream *rtsp_st,
97 int payload_type, const char *p)
104 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
105 * see if we can handle this kind of payload.
106 * The space should normally not be there but some Real streams or
107 * particular servers ("RealServer Version 6.1.3.970", see issue 1658)
108 * have a trailing space. */
109 get_word_sep(buf, sizeof(buf), "/ ", &p);
110 if (payload_type >= RTP_PT_PRIVATE) {
111 RTPDynamicProtocolHandler *handler;
112 for (handler = RTPFirstDynamicPayloadHandler;
113 handler; handler = handler->next) {
114 if (!strcasecmp(buf, handler->enc_name) &&
115 codec->codec_type == handler->codec_type) {
116 codec->codec_id = handler->codec_id;
117 rtsp_st->dynamic_handler = handler;
119 rtsp_st->dynamic_protocol_context = handler->open();
124 /* We are in a standard case
125 * (from http://www.iana.org/assignments/rtp-parameters). */
126 /* search into AVRtpPayloadTypes[] */
127 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
130 c = avcodec_find_decoder(codec->codec_id);
134 c_name = (char *) NULL;
137 get_word_sep(buf, sizeof(buf), "/", &p);
139 switch (codec->codec_type) {
140 case CODEC_TYPE_AUDIO:
141 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
142 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
143 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
145 codec->sample_rate = i;
146 get_word_sep(buf, sizeof(buf), "/", &p);
150 // TODO: there is a bug here; if it is a mono stream, and
151 // less than 22000Hz, faad upconverts to stereo and twice
152 // the frequency. No problem, but the sample rate is being
153 // set here by the sdp line. Patch on its way. (rdm)
155 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
157 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
160 case CODEC_TYPE_VIDEO:
161 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
172 /* return the length and optionally the data */
173 static int hex_to_data(uint8_t *data, const char *p)
183 c = toupper((unsigned char) *p++);
184 if (c >= '0' && c <= '9')
186 else if (c >= 'A' && c <= 'F')
201 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
202 char *attr, char *value)
204 switch (codec->codec_id) {
207 if (!strcmp(attr, "config")) {
208 /* decode the hexa encoded parameter */
209 int len = hex_to_data(NULL, value);
210 if (codec->extradata)
211 av_free(codec->extradata);
212 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
213 if (!codec->extradata)
215 codec->extradata_size = len;
216 hex_to_data(codec->extradata, value);
219 case CODEC_ID_VORBIS:
220 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
234 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
235 #define ATTR_NAME_TYPE_INT 0
236 #define ATTR_NAME_TYPE_STR 1
237 static const AttrNameMap attr_names[]=
239 { "SizeLength", ATTR_NAME_TYPE_INT,
240 offsetof(RTPPayloadData, sizelength) },
241 { "IndexLength", ATTR_NAME_TYPE_INT,
242 offsetof(RTPPayloadData, indexlength) },
243 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
244 offsetof(RTPPayloadData, indexdeltalength) },
245 { "profile-level-id", ATTR_NAME_TYPE_INT,
246 offsetof(RTPPayloadData, profile_level_id) },
247 { "StreamType", ATTR_NAME_TYPE_INT,
248 offsetof(RTPPayloadData, streamtype) },
249 { "mode", ATTR_NAME_TYPE_STR,
250 offsetof(RTPPayloadData, mode) },
254 /* parse the attribute line from the fmtp a line of an sdp resonse. This
255 * is broken out as a function because it is used in rtp_h264.c, which is
257 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
258 char *value, int value_size)
262 get_word_sep(attr, attr_size, "=", p);
265 get_word_sep(value, value_size, ";", p);
273 /* parse a SDP line and save stream attributes */
274 static void sdp_parse_fmtp(AVStream *st, const char *p)
277 /* Vorbis setup headers can be up to 12KB and are sent base64
278 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
281 RTSPStream *rtsp_st = st->priv_data;
282 AVCodecContext *codec = st->codec;
283 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
285 /* loop on each attribute */
286 while (rtsp_next_attr_and_value(&p, attr, sizeof(attr),
287 value, sizeof(value))) {
288 /* grab the codec extra_data from the config parameter of the fmtp
290 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
292 /* Looking for a known attribute */
293 for (i = 0; attr_names[i].str; ++i) {
294 if (!strcasecmp(attr, attr_names[i].str)) {
295 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
296 *(int *)((char *)rtp_payload_data +
297 attr_names[i].offset) = atoi(value);
298 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
299 *(char **)((char *)rtp_payload_data +
300 attr_names[i].offset) = av_strdup(value);
306 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
308 * Used for seeking in the rtp stream.
310 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
315 if (!av_stristart(p, "npt=", &p))
318 *start = AV_NOPTS_VALUE;
319 *end = AV_NOPTS_VALUE;
321 get_word_sep(buf, sizeof(buf), "-", &p);
322 *start = parse_date(buf, 1);
325 get_word_sep(buf, sizeof(buf), "-", &p);
326 *end = parse_date(buf, 1);
328 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
329 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
332 typedef struct SDPParseState {
334 struct in_addr default_ip;
336 int skip_media; ///< set if an unknown m= line occurs
339 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
340 int letter, const char *buf)
342 RTSPState *rt = s->priv_data;
343 char buf1[64], st_type[64];
345 enum CodecType codec_type;
349 struct in_addr sdp_ip;
352 dprintf(s, "sdp: %c='%s'\n", letter, buf);
355 if (s1->skip_media && letter != 'm')
359 get_word(buf1, sizeof(buf1), &p);
360 if (strcmp(buf1, "IN") != 0)
362 get_word(buf1, sizeof(buf1), &p);
363 if (strcmp(buf1, "IP4") != 0)
365 get_word_sep(buf1, sizeof(buf1), "/", &p);
366 if (inet_aton(buf1, &sdp_ip) == 0)
371 get_word_sep(buf1, sizeof(buf1), "/", &p);
374 if (s->nb_streams == 0) {
375 s1->default_ip = sdp_ip;
376 s1->default_ttl = ttl;
378 st = s->streams[s->nb_streams - 1];
379 rtsp_st = st->priv_data;
380 rtsp_st->sdp_ip = sdp_ip;
381 rtsp_st->sdp_ttl = ttl;
385 av_metadata_set(&s->metadata, "title", p);
388 if (s->nb_streams == 0) {
389 av_metadata_set(&s->metadata, "comment", p);
396 get_word(st_type, sizeof(st_type), &p);
397 if (!strcmp(st_type, "audio")) {
398 codec_type = CODEC_TYPE_AUDIO;
399 } else if (!strcmp(st_type, "video")) {
400 codec_type = CODEC_TYPE_VIDEO;
401 } else if (!strcmp(st_type, "application")) {
402 codec_type = CODEC_TYPE_DATA;
407 rtsp_st = av_mallocz(sizeof(RTSPStream));
410 rtsp_st->stream_index = -1;
411 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
413 rtsp_st->sdp_ip = s1->default_ip;
414 rtsp_st->sdp_ttl = s1->default_ttl;
416 get_word(buf1, sizeof(buf1), &p); /* port */
417 rtsp_st->sdp_port = atoi(buf1);
419 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
421 /* XXX: handle list of formats */
422 get_word(buf1, sizeof(buf1), &p); /* format list */
423 rtsp_st->sdp_payload_type = atoi(buf1);
425 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
426 /* no corresponding stream */
428 st = av_new_stream(s, 0);
431 st->priv_data = rtsp_st;
432 rtsp_st->stream_index = st->index;
433 st->codec->codec_type = codec_type;
434 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
435 /* if standard payload type, we can find the codec right now */
436 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
439 /* put a default control url */
440 av_strlcpy(rtsp_st->control_url, s->filename,
441 sizeof(rtsp_st->control_url));
444 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
446 /* get the control url */
447 st = s->streams[s->nb_streams - 1];
448 rtsp_st = st->priv_data;
450 /* XXX: may need to add full url resolution */
451 url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
453 if (proto[0] == '\0') {
454 /* relative control URL */
455 av_strlcat(rtsp_st->control_url, "/",
456 sizeof(rtsp_st->control_url));
457 av_strlcat(rtsp_st->control_url, p,
458 sizeof(rtsp_st->control_url));
460 av_strlcpy(rtsp_st->control_url, p,
461 sizeof(rtsp_st->control_url));
462 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
463 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
464 get_word(buf1, sizeof(buf1), &p);
465 payload_type = atoi(buf1);
466 st = s->streams[s->nb_streams - 1];
467 rtsp_st = st->priv_data;
468 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
469 } else if (av_strstart(p, "fmtp:", &p)) {
470 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
471 get_word(buf1, sizeof(buf1), &p);
472 payload_type = atoi(buf1);
473 for (i = 0; i < s->nb_streams; i++) {
475 rtsp_st = st->priv_data;
476 if (rtsp_st->sdp_payload_type == payload_type) {
477 if (!(rtsp_st->dynamic_handler &&
478 rtsp_st->dynamic_handler->parse_sdp_a_line &&
479 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
480 i, rtsp_st->dynamic_protocol_context, buf)))
481 sdp_parse_fmtp(st, p);
484 } else if (av_strstart(p, "framesize:", &p)) {
485 // let dynamic protocol handlers have a stab at the line.
486 get_word(buf1, sizeof(buf1), &p);
487 payload_type = atoi(buf1);
488 for (i = 0; i < s->nb_streams; i++) {
490 rtsp_st = st->priv_data;
491 if (rtsp_st->sdp_payload_type == payload_type &&
492 rtsp_st->dynamic_handler &&
493 rtsp_st->dynamic_handler->parse_sdp_a_line)
494 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
495 rtsp_st->dynamic_protocol_context, buf);
497 } else if (av_strstart(p, "range:", &p)) {
500 // this is so that seeking on a streamed file can work.
501 rtsp_parse_range_npt(p, &start, &end);
502 s->start_time = start;
503 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
504 s->duration = (end == AV_NOPTS_VALUE) ?
505 AV_NOPTS_VALUE : end - start;
506 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
508 rt->transport = RTSP_TRANSPORT_RDT;
510 if (rt->server_type == RTSP_SERVER_WMS)
511 ff_wms_parse_sdp_a_line(s, p);
512 if (s->nb_streams > 0) {
513 if (rt->server_type == RTSP_SERVER_REAL)
514 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
516 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
517 if (rtsp_st->dynamic_handler &&
518 rtsp_st->dynamic_handler->parse_sdp_a_line)
519 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
521 rtsp_st->dynamic_protocol_context, buf);
528 static int sdp_parse(AVFormatContext *s, const char *content)
532 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
533 * contain long SDP lines containing complete ASF Headers (several
534 * kB) or arrays of MDPR (RM stream descriptor) headers plus
535 * "rulebooks" describing their properties. Therefore, the SDP line
538 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
540 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
542 memset(s1, 0, sizeof(SDPParseState));
553 /* get the content */
555 while (*p != '\n' && *p != '\r' && *p != '\0') {
556 if ((q - buf) < sizeof(buf) - 1)
561 sdp_parse_line(s, s1, letter, buf);
563 while (*p != '\n' && *p != '\0')
571 /* close and free RTSP streams */
572 static void rtsp_close_streams(RTSPState *rt)
577 for (i = 0; i < rt->nb_rtsp_streams; i++) {
578 rtsp_st = rt->rtsp_streams[i];
580 if (rtsp_st->transport_priv) {
581 if (rt->transport == RTSP_TRANSPORT_RDT)
582 ff_rdt_parse_close(rtsp_st->transport_priv);
584 rtp_parse_close(rtsp_st->transport_priv);
586 if (rtsp_st->rtp_handle)
587 url_close(rtsp_st->rtp_handle);
588 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
589 rtsp_st->dynamic_handler->close(
590 rtsp_st->dynamic_protocol_context);
593 av_free(rt->rtsp_streams);
595 av_close_input_stream (rt->asf_ctx);
598 av_freep(&rt->auth_b64);
601 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
603 RTSPState *rt = s->priv_data;
606 /* open the RTP context */
607 if (rtsp_st->stream_index >= 0)
608 st = s->streams[rtsp_st->stream_index];
610 s->ctx_flags |= AVFMTCTX_NOHEADER;
612 if (rt->transport == RTSP_TRANSPORT_RDT)
613 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
614 rtsp_st->dynamic_protocol_context,
615 rtsp_st->dynamic_handler);
617 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
618 rtsp_st->sdp_payload_type,
619 &rtsp_st->rtp_payload_data);
621 if (!rtsp_st->transport_priv) {
622 return AVERROR(ENOMEM);
623 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
624 if (rtsp_st->dynamic_handler) {
625 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
626 rtsp_st->dynamic_protocol_context,
627 rtsp_st->dynamic_handler);
634 #if CONFIG_RTSP_DEMUXER
635 static int rtsp_probe(AVProbeData *p)
637 if (av_strstart(p->filename, "rtsp:", NULL))
638 return AVPROBE_SCORE_MAX;
642 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
649 v = strtol(p, (char **)&p, 10);
653 v = strtol(p, (char **)&p, 10);
662 /* XXX: only one transport specification is parsed */
663 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
665 char transport_protocol[16];
667 char lower_transport[16];
669 RTSPTransportField *th;
672 reply->nb_transports = 0;
679 th = &reply->transports[reply->nb_transports];
681 get_word_sep(transport_protocol, sizeof(transport_protocol),
683 if (!strcasecmp (transport_protocol, "rtp")) {
684 get_word_sep(profile, sizeof(profile), "/;,", &p);
685 lower_transport[0] = '\0';
686 /* rtp/avp/<protocol> */
688 get_word_sep(lower_transport, sizeof(lower_transport),
691 th->transport = RTSP_TRANSPORT_RTP;
692 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
693 !strcasecmp (transport_protocol, "x-real-rdt")) {
694 /* x-pn-tng/<protocol> */
695 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
697 th->transport = RTSP_TRANSPORT_RDT;
699 if (!strcasecmp(lower_transport, "TCP"))
700 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
702 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
706 /* get each parameter */
707 while (*p != '\0' && *p != ',') {
708 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
709 if (!strcmp(parameter, "port")) {
712 rtsp_parse_range(&th->port_min, &th->port_max, &p);
714 } else if (!strcmp(parameter, "client_port")) {
717 rtsp_parse_range(&th->client_port_min,
718 &th->client_port_max, &p);
720 } else if (!strcmp(parameter, "server_port")) {
723 rtsp_parse_range(&th->server_port_min,
724 &th->server_port_max, &p);
726 } else if (!strcmp(parameter, "interleaved")) {
729 rtsp_parse_range(&th->interleaved_min,
730 &th->interleaved_max, &p);
732 } else if (!strcmp(parameter, "multicast")) {
733 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
734 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
735 } else if (!strcmp(parameter, "ttl")) {
738 th->ttl = strtol(p, (char **)&p, 10);
740 } else if (!strcmp(parameter, "destination")) {
741 struct in_addr ipaddr;
745 get_word_sep(buf, sizeof(buf), ";,", &p);
746 if (inet_aton(buf, &ipaddr))
747 th->destination = ntohl(ipaddr.s_addr);
750 while (*p != ';' && *p != '\0' && *p != ',')
758 reply->nb_transports++;
762 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
766 /* NOTE: we do case independent match for broken servers */
768 if (av_stristart(p, "Session:", &p)) {
770 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
771 if (av_stristart(p, ";timeout=", &p) &&
772 (t = strtol(p, NULL, 10)) > 0) {
775 } else if (av_stristart(p, "Content-Length:", &p)) {
776 reply->content_length = strtol(p, NULL, 10);
777 } else if (av_stristart(p, "Transport:", &p)) {
778 rtsp_parse_transport(reply, p);
779 } else if (av_stristart(p, "CSeq:", &p)) {
780 reply->seq = strtol(p, NULL, 10);
781 } else if (av_stristart(p, "Range:", &p)) {
782 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
783 } else if (av_stristart(p, "RealChallenge1:", &p)) {
785 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
786 } else if (av_stristart(p, "Server:", &p)) {
788 av_strlcpy(reply->server, p, sizeof(reply->server));
789 } else if (av_stristart(p, "Notice:", &p) ||
790 av_stristart(p, "X-Notice:", &p)) {
791 reply->notice = strtol(p, NULL, 10);
792 } else if (av_stristart(p, "Location:", &p)) {
794 av_strlcpy(reply->location, p , sizeof(reply->location));
798 /* skip a RTP/TCP interleaved packet */
799 static void rtsp_skip_packet(AVFormatContext *s)
801 RTSPState *rt = s->priv_data;
805 ret = url_read_complete(rt->rtsp_hd, buf, 3);
808 len = AV_RB16(buf + 1);
810 dprintf(s, "skipping RTP packet len=%d\n", len);
815 if (len1 > sizeof(buf))
817 ret = url_read_complete(rt->rtsp_hd, buf, len1);
825 * Read a RTSP message from the server, or prepare to read data
826 * packets if we're reading data interleaved over the TCP/RTSP
827 * connection as well.
829 * @param s RTSP demuxer context
830 * @param reply pointer where the RTSP message header will be stored
831 * @param content_ptr pointer where the RTSP message body, if any, will
832 * be stored (length is in reply)
833 * @param return_on_interleaved_data whether the function may return if we
834 * encounter a data marker ('$'), which precedes data
835 * packets over interleaved TCP/RTSP connections. If this
836 * is set, this function will return 1 after encountering
837 * a '$'. If it is not set, the function will skip any
838 * data packets (if they are encountered), until a reply
839 * has been fully parsed. If no more data is available
840 * without parsing a reply, it will return an error.
842 * @returns 1 if a data packets is ready to be received, -1 on error,
845 static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
846 unsigned char **content_ptr,
847 int return_on_interleaved_data)
849 RTSPState *rt = s->priv_data;
850 char buf[4096], buf1[1024], *q;
853 int ret, content_length, line_count = 0;
854 unsigned char *content = NULL;
856 memset(reply, 0, sizeof(*reply));
858 /* parse reply (XXX: use buffers) */
859 rt->last_reply[0] = '\0';
863 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
865 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
872 /* XXX: only parse it if first char on line ? */
873 if (return_on_interleaved_data) {
877 } else if (ch != '\r') {
878 if ((q - buf) < sizeof(buf) - 1)
884 dprintf(s, "line='%s'\n", buf);
886 /* test if last line */
890 if (line_count == 0) {
892 get_word(buf1, sizeof(buf1), &p);
893 get_word(buf1, sizeof(buf1), &p);
894 reply->status_code = atoi(buf1);
896 rtsp_parse_line(reply, p);
897 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
898 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
903 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
904 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
906 content_length = reply->content_length;
907 if (content_length > 0) {
908 /* leave some room for a trailing '\0' (useful for simple parsing) */
909 content = av_malloc(content_length + 1);
910 (void)url_read_complete(rt->rtsp_hd, content, content_length);
911 content[content_length] = '\0';
914 *content_ptr = content;
919 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
920 reply->notice == 2104 /* Start-of-Stream Reached */ ||
921 reply->notice == 2306 /* Continuous Feed Terminated */) {
922 rt->state = RTSP_STATE_IDLE;
923 } else if (reply->notice >= 4400 && reply->notice < 5500) {
924 return AVERROR(EIO); /* data or server error */
925 } else if (reply->notice == 2401 /* Ticket Expired */ ||
926 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
927 return AVERROR(EPERM);
932 static void rtsp_send_cmd_async(AVFormatContext *s,
933 const char *cmd, RTSPMessageHeader *reply,
934 unsigned char **content_ptr)
936 RTSPState *rt = s->priv_data;
937 char buf[4096], buf1[1024];
940 av_strlcpy(buf, cmd, sizeof(buf));
941 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
942 av_strlcat(buf, buf1, sizeof(buf));
943 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
944 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
945 av_strlcat(buf, buf1, sizeof(buf));
948 av_strlcatf(buf, sizeof(buf),
949 "Authorization: Basic %s\r\n",
951 av_strlcat(buf, "\r\n", sizeof(buf));
953 dprintf(s, "Sending:\n%s--\n", buf);
955 url_write(rt->rtsp_hd, buf, strlen(buf));
956 rt->last_cmd_time = av_gettime();
959 static void rtsp_send_cmd(AVFormatContext *s,
960 const char *cmd, RTSPMessageHeader *reply,
961 unsigned char **content_ptr)
963 rtsp_send_cmd_async(s, cmd, reply, content_ptr);
965 rtsp_read_reply(s, reply, content_ptr, 0);
969 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
971 static int make_setup_request(AVFormatContext *s, const char *host, int port,
972 int lower_transport, const char *real_challenge)
974 RTSPState *rt = s->priv_data;
975 int rtx, j, i, err, interleave = 0;
977 RTSPMessageHeader reply1, *reply = &reply1;
979 const char *trans_pref;
981 if (rt->transport == RTSP_TRANSPORT_RDT)
982 trans_pref = "x-pn-tng";
984 trans_pref = "RTP/AVP";
986 /* default timeout: 1 minute */
989 /* for each stream, make the setup request */
990 /* XXX: we assume the same server is used for the control of each
993 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
994 char transport[2048];
997 * WMS serves all UDP data over a single connection, the RTX, which
998 * isn't necessarily the first in the SDP but has to be the first
999 * to be set up, else the second/third SETUP will fail with a 461.
1001 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
1002 rt->server_type == RTSP_SERVER_WMS) {
1005 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1006 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1008 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1012 if (rtx == rt->nb_rtsp_streams)
1013 return -1; /* no RTX found */
1014 rtsp_st = rt->rtsp_streams[rtx];
1016 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1018 rtsp_st = rt->rtsp_streams[i];
1021 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1024 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1025 port = reply->transports[0].client_port_min;
1029 /* first try in specified port range */
1030 if (RTSP_RTP_PORT_MIN != 0) {
1031 while (j <= RTSP_RTP_PORT_MAX) {
1032 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1034 /* we will use two ports per rtp stream (rtp and rtcp) */
1036 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1042 /* then try on any port */
1043 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1044 err = AVERROR_INVALIDDATA;
1050 port = rtp_get_local_port(rtsp_st->rtp_handle);
1052 snprintf(transport, sizeof(transport) - 1,
1053 "%s/UDP;", trans_pref);
1054 if (rt->server_type != RTSP_SERVER_REAL)
1055 av_strlcat(transport, "unicast;", sizeof(transport));
1056 av_strlcatf(transport, sizeof(transport),
1057 "client_port=%d", port);
1058 if (rt->transport == RTSP_TRANSPORT_RTP &&
1059 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1060 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1064 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1065 /** For WMS streams, the application streams are only used for
1066 * UDP. When trying to set it up for TCP streams, the server
1067 * will return an error. Therefore, we skip those streams. */
1068 if (rt->server_type == RTSP_SERVER_WMS &&
1069 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1072 snprintf(transport, sizeof(transport) - 1,
1073 "%s/TCP;", trans_pref);
1074 if (rt->server_type == RTSP_SERVER_WMS)
1075 av_strlcat(transport, "unicast;", sizeof(transport));
1076 av_strlcatf(transport, sizeof(transport),
1077 "interleaved=%d-%d",
1078 interleave, interleave + 1);
1082 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1083 snprintf(transport, sizeof(transport) - 1,
1084 "%s/UDP;multicast", trans_pref);
1086 if (rt->server_type == RTSP_SERVER_REAL ||
1087 rt->server_type == RTSP_SERVER_WMS)
1088 av_strlcat(transport, ";mode=play", sizeof(transport));
1089 snprintf(cmd, sizeof(cmd),
1090 "SETUP %s RTSP/1.0\r\n"
1091 "Transport: %s\r\n",
1092 rtsp_st->control_url, transport);
1093 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1094 char real_res[41], real_csum[9];
1095 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1097 av_strlcatf(cmd, sizeof(cmd),
1099 "RealChallenge2: %s, sd=%s\r\n",
1100 rt->session_id, real_res, real_csum);
1102 rtsp_send_cmd(s, cmd, reply, NULL);
1103 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1106 } else if (reply->status_code != RTSP_STATUS_OK ||
1107 reply->nb_transports != 1) {
1108 err = AVERROR_INVALIDDATA;
1112 /* XXX: same protocol for all streams is required */
1114 if (reply->transports[0].lower_transport != rt->lower_transport ||
1115 reply->transports[0].transport != rt->transport) {
1116 err = AVERROR_INVALIDDATA;
1120 rt->lower_transport = reply->transports[0].lower_transport;
1121 rt->transport = reply->transports[0].transport;
1124 /* close RTP connection if not choosen */
1125 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1126 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1127 url_close(rtsp_st->rtp_handle);
1128 rtsp_st->rtp_handle = NULL;
1131 switch(reply->transports[0].lower_transport) {
1132 case RTSP_LOWER_TRANSPORT_TCP:
1133 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1134 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1137 case RTSP_LOWER_TRANSPORT_UDP: {
1140 /* XXX: also use address if specified */
1141 snprintf(url, sizeof(url), "rtp://%s:%d",
1142 host, reply->transports[0].server_port_min);
1143 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1144 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1145 err = AVERROR_INVALIDDATA;
1150 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1155 if (reply->transports[0].destination) {
1156 in.s_addr = htonl(reply->transports[0].destination);
1157 port = reply->transports[0].port_min;
1158 ttl = reply->transports[0].ttl;
1160 in = rtsp_st->sdp_ip;
1161 port = rtsp_st->sdp_port;
1162 ttl = rtsp_st->sdp_ttl;
1164 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1165 inet_ntoa(in), port, ttl);
1166 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1167 err = AVERROR_INVALIDDATA;
1174 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1178 if (reply->timeout > 0)
1179 rt->timeout = reply->timeout;
1181 if (rt->server_type == RTSP_SERVER_REAL)
1182 rt->need_subscription = 1;
1187 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1188 if (rt->rtsp_streams[i]->rtp_handle) {
1189 url_close(rt->rtsp_streams[i]->rtp_handle);
1190 rt->rtsp_streams[i]->rtp_handle = NULL;
1196 static int rtsp_read_play(AVFormatContext *s)
1198 RTSPState *rt = s->priv_data;
1199 RTSPMessageHeader reply1, *reply = &reply1;
1202 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1204 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1205 if (rt->state == RTSP_STATE_PAUSED) {
1206 snprintf(cmd, sizeof(cmd),
1207 "PLAY %s RTSP/1.0\r\n",
1210 snprintf(cmd, sizeof(cmd),
1211 "PLAY %s RTSP/1.0\r\n"
1212 "Range: npt=%0.3f-\r\n",
1214 (double)rt->seek_timestamp / AV_TIME_BASE);
1216 rtsp_send_cmd(s, cmd, reply, NULL);
1217 if (reply->status_code != RTSP_STATUS_OK) {
1221 rt->state = RTSP_STATE_PLAYING;
1225 static int rtsp_read_header(AVFormatContext *s,
1226 AVFormatParameters *ap)
1228 RTSPState *rt = s->priv_data;
1229 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1230 char *option_list, *option, *filename;
1231 URLContext *rtsp_hd;
1233 RTSPMessageHeader reply1, *reply = &reply1;
1234 unsigned char *content = NULL;
1235 int lower_transport_mask = 0;
1236 char real_challenge[64];
1238 /* extract hostname and port */
1239 url_split(NULL, 0, auth, sizeof(auth),
1240 host, sizeof(host), &port, path, sizeof(path), s->filename);
1242 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1244 if (!(rt->auth_b64 = av_malloc(b64_len)))
1245 return AVERROR(ENOMEM);
1246 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1247 err = AVERROR(EINVAL);
1252 port = RTSP_DEFAULT_PORT;
1254 /* search for options */
1255 option_list = strchr(path, '?');
1257 filename = strchr(s->filename, '?');
1258 while (option_list) {
1259 /* move the option pointer */
1260 option = ++option_list;
1261 option_list = strchr(option_list, '&');
1265 /* handle the options */
1266 if (!strcmp(option, "udp")) {
1267 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1268 } else if (!strcmp(option, "multicast")) {
1269 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1270 } else if (!strcmp(option, "tcp")) {
1271 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1273 strcpy(++filename, option);
1274 filename += strlen(option);
1275 if (option_list) *filename = '&';
1281 if (!lower_transport_mask)
1282 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1284 /* open the tcp connexion */
1285 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1286 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1290 rt->rtsp_hd = rtsp_hd;
1293 /* request options supported by the server; this also detects server
1295 for (rt->server_type = RTSP_SERVER_RTP;;) {
1296 snprintf(cmd, sizeof(cmd),
1297 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1298 if (rt->server_type == RTSP_SERVER_REAL)
1301 * The following entries are required for proper
1302 * streaming from a Realmedia server. They are
1303 * interdependent in some way although we currently
1304 * don't quite understand how. Values were copied
1305 * from mplayer SVN r23589.
1306 * @param CompanyID is a 16-byte ID in base64
1307 * @param ClientChallenge is a 16-byte ID in hex
1309 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1310 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1311 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1312 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1314 rtsp_send_cmd(s, cmd, reply, NULL);
1315 if (reply->status_code != RTSP_STATUS_OK) {
1316 err = AVERROR_INVALIDDATA;
1320 /* detect server type if not standard-compliant RTP */
1321 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1322 rt->server_type = RTSP_SERVER_REAL;
1324 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1325 rt->server_type = RTSP_SERVER_WMS;
1326 } else if (rt->server_type == RTSP_SERVER_REAL)
1327 strcpy(real_challenge, reply->real_challenge);
1331 /* describe the stream */
1332 snprintf(cmd, sizeof(cmd),
1333 "DESCRIBE %s RTSP/1.0\r\n"
1334 "Accept: application/sdp\r\n",
1336 if (rt->server_type == RTSP_SERVER_REAL) {
1338 * The Require: attribute is needed for proper streaming from
1339 * Realmedia servers.
1342 "Require: com.real.retain-entity-for-setup\r\n",
1345 rtsp_send_cmd(s, cmd, reply, &content);
1347 err = AVERROR_INVALIDDATA;
1350 if (reply->status_code != RTSP_STATUS_OK) {
1351 err = AVERROR_INVALIDDATA;
1355 /* now we got the SDP description, we parse it */
1356 ret = sdp_parse(s, (const char *)content);
1359 err = AVERROR_INVALIDDATA;
1364 int lower_transport = ff_log2_tab[lower_transport_mask &
1365 ~(lower_transport_mask - 1)];
1367 err = make_setup_request(s, host, port, lower_transport,
1368 rt->server_type == RTSP_SERVER_REAL ?
1369 real_challenge : NULL);
1372 lower_transport_mask &= ~(1 << lower_transport);
1373 if (lower_transport_mask == 0 && err == 1) {
1374 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1379 rt->state = RTSP_STATE_IDLE;
1380 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1381 if (ap->initial_pause) {
1382 /* do not start immediately */
1384 if (rtsp_read_play(s) < 0) {
1385 err = AVERROR_INVALIDDATA;
1391 rtsp_close_streams(rt);
1393 url_close(rt->rtsp_hd);
1394 if (reply->status_code >=300 && reply->status_code < 400) {
1395 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1396 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1404 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1405 uint8_t *buf, int buf_size)
1407 RTSPState *rt = s->priv_data;
1408 RTSPStream *rtsp_st;
1410 int fd, fd_max, n, i, ret, tcp_fd;
1414 if (url_interrupt_cb())
1415 return AVERROR(EINTR);
1418 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1419 FD_SET(tcp_fd, &rfds);
1424 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1425 rtsp_st = rt->rtsp_streams[i];
1426 if (rtsp_st->rtp_handle) {
1427 /* currently, we cannot probe RTCP handle because of
1428 * blocking restrictions */
1429 fd = url_get_file_handle(rtsp_st->rtp_handle);
1436 tv.tv_usec = 100 * 1000;
1437 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1439 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1440 rtsp_st = rt->rtsp_streams[i];
1441 if (rtsp_st->rtp_handle) {
1442 fd = url_get_file_handle(rtsp_st->rtp_handle);
1443 if (FD_ISSET(fd, &rfds)) {
1444 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1446 *prtsp_st = rtsp_st;
1452 #if CONFIG_RTSP_DEMUXER
1453 if (FD_ISSET(tcp_fd, &rfds)) {
1454 RTSPMessageHeader reply;
1456 rtsp_read_reply(s, &reply, NULL, 0);
1457 /* XXX: parse message */
1458 if (rt->state != RTSP_STATE_PLAYING)
1466 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1467 uint8_t *buf, int buf_size)
1469 RTSPState *rt = s->priv_data;
1470 int id, len, i, ret;
1471 RTSPStream *rtsp_st;
1473 #ifdef DEBUG_RTP_TCP
1474 dprintf(s, "tcp_read_packet:\n");
1478 RTSPMessageHeader reply;
1480 ret = rtsp_read_reply(s, &reply, NULL, 1);
1483 if (ret == 1) /* received '$' */
1485 /* XXX: parse message */
1486 if (rt->state != RTSP_STATE_PLAYING)
1489 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1493 len = AV_RB16(buf + 1);
1494 #ifdef DEBUG_RTP_TCP
1495 dprintf(s, "id=%d len=%d\n", id, len);
1497 if (len > buf_size || len < 12)
1500 ret = url_read_complete(rt->rtsp_hd, buf, len);
1503 if (rt->transport == RTSP_TRANSPORT_RDT &&
1504 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1507 /* find the matching stream */
1508 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1509 rtsp_st = rt->rtsp_streams[i];
1510 if (id >= rtsp_st->interleaved_min &&
1511 id <= rtsp_st->interleaved_max)
1516 *prtsp_st = rtsp_st;
1520 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1522 RTSPState *rt = s->priv_data;
1524 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1525 RTSPStream *rtsp_st;
1527 /* get next frames from the same RTP packet */
1528 if (rt->cur_transport_priv) {
1529 if (rt->transport == RTSP_TRANSPORT_RDT) {
1530 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1532 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1534 rt->cur_transport_priv = NULL;
1536 } else if (ret == 1) {
1539 rt->cur_transport_priv = NULL;
1542 /* read next RTP packet */
1544 switch(rt->lower_transport) {
1546 #if CONFIG_RTSP_DEMUXER
1547 case RTSP_LOWER_TRANSPORT_TCP:
1548 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1551 case RTSP_LOWER_TRANSPORT_UDP:
1552 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1553 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1554 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1555 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1562 if (rt->transport == RTSP_TRANSPORT_RDT) {
1563 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1565 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1569 /* more packets may follow, so we save the RTP context */
1570 rt->cur_transport_priv = rtsp_st->transport_priv;
1575 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1577 RTSPState *rt = s->priv_data;
1579 RTSPMessageHeader reply1, *reply = &reply1;
1582 if (rt->server_type == RTSP_SERVER_REAL) {
1584 enum AVDiscard cache[MAX_STREAMS];
1586 for (i = 0; i < s->nb_streams; i++)
1587 cache[i] = s->streams[i]->discard;
1589 if (!rt->need_subscription) {
1590 if (memcmp (cache, rt->real_setup_cache,
1591 sizeof(enum AVDiscard) * s->nb_streams)) {
1592 av_strlcatf(cmd, sizeof(cmd),
1593 "SET_PARAMETER %s RTSP/1.0\r\n"
1594 "Unsubscribe: %s\r\n",
1595 s->filename, rt->last_subscription);
1596 rtsp_send_cmd(s, cmd, reply, NULL);
1597 if (reply->status_code != RTSP_STATUS_OK)
1598 return AVERROR_INVALIDDATA;
1599 rt->need_subscription = 1;
1603 if (rt->need_subscription) {
1604 int r, rule_nr, first = 1;
1606 memcpy(rt->real_setup_cache, cache,
1607 sizeof(enum AVDiscard) * s->nb_streams);
1608 rt->last_subscription[0] = 0;
1610 snprintf(cmd, sizeof(cmd),
1611 "SET_PARAMETER %s RTSP/1.0\r\n"
1614 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1616 for (r = 0; r < s->nb_streams; r++) {
1617 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1618 if (s->streams[r]->discard != AVDISCARD_ALL) {
1620 av_strlcat(rt->last_subscription, ",",
1621 sizeof(rt->last_subscription));
1622 ff_rdt_subscribe_rule(
1623 rt->last_subscription,
1624 sizeof(rt->last_subscription), i, rule_nr);
1631 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1632 rtsp_send_cmd(s, cmd, reply, NULL);
1633 if (reply->status_code != RTSP_STATUS_OK)
1634 return AVERROR_INVALIDDATA;
1635 rt->need_subscription = 0;
1637 if (rt->state == RTSP_STATE_PLAYING)
1642 ret = rtsp_fetch_packet(s, pkt);
1646 /* send dummy request to keep TCP connection alive */
1647 if ((rt->server_type == RTSP_SERVER_WMS ||
1648 rt->server_type == RTSP_SERVER_REAL) &&
1649 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1650 if (rt->server_type == RTSP_SERVER_WMS) {
1651 snprintf(cmd, sizeof(cmd) - 1,
1652 "GET_PARAMETER %s RTSP/1.0\r\n",
1654 rtsp_send_cmd_async(s, cmd, reply, NULL);
1656 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n",
1664 /* pause the stream */
1665 static int rtsp_read_pause(AVFormatContext *s)
1667 RTSPState *rt = s->priv_data;
1668 RTSPMessageHeader reply1, *reply = &reply1;
1673 if (rt->state != RTSP_STATE_PLAYING)
1675 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1676 snprintf(cmd, sizeof(cmd),
1677 "PAUSE %s RTSP/1.0\r\n",
1679 rtsp_send_cmd(s, cmd, reply, NULL);
1680 if (reply->status_code != RTSP_STATUS_OK) {
1684 rt->state = RTSP_STATE_PAUSED;
1688 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1689 int64_t timestamp, int flags)
1691 RTSPState *rt = s->priv_data;
1693 rt->seek_timestamp = av_rescale_q(timestamp,
1694 s->streams[stream_index]->time_base,
1698 case RTSP_STATE_IDLE:
1700 case RTSP_STATE_PLAYING:
1701 if (rtsp_read_pause(s) != 0)
1703 rt->state = RTSP_STATE_SEEKING;
1704 if (rtsp_read_play(s) != 0)
1707 case RTSP_STATE_PAUSED:
1708 rt->state = RTSP_STATE_IDLE;
1714 static int rtsp_read_close(AVFormatContext *s)
1716 RTSPState *rt = s->priv_data;
1717 RTSPMessageHeader reply1, *reply = &reply1;
1721 /* NOTE: it is valid to flush the buffer here */
1722 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1723 url_fclose(&rt->rtsp_gb);
1726 snprintf(cmd, sizeof(cmd),
1727 "TEARDOWN %s RTSP/1.0\r\n",
1729 rtsp_send_cmd(s, cmd, reply, NULL);
1731 rtsp_close_streams(rt);
1732 url_close(rt->rtsp_hd);
1736 AVInputFormat rtsp_demuxer = {
1738 NULL_IF_CONFIG_SMALL("RTSP input format"),
1745 .flags = AVFMT_NOFILE,
1746 .read_play = rtsp_read_play,
1747 .read_pause = rtsp_read_pause,
1751 static int sdp_probe(AVProbeData *p1)
1753 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1755 /* we look for a line beginning "c=IN IP4" */
1756 while (p < p_end && *p != '\0') {
1757 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1758 av_strstart(p, "c=IN IP4", NULL))
1759 return AVPROBE_SCORE_MAX / 2;
1761 while (p < p_end - 1 && *p != '\n') p++;
1770 #define SDP_MAX_SIZE 8192
1772 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1774 RTSPState *rt = s->priv_data;
1775 RTSPStream *rtsp_st;
1780 /* read the whole sdp file */
1781 /* XXX: better loading */
1782 content = av_malloc(SDP_MAX_SIZE);
1783 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1786 return AVERROR_INVALIDDATA;
1788 content[size] ='\0';
1790 sdp_parse(s, content);
1793 /* open each RTP stream */
1794 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1795 rtsp_st = rt->rtsp_streams[i];
1797 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1798 inet_ntoa(rtsp_st->sdp_ip),
1802 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1803 err = AVERROR_INVALIDDATA;
1806 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1811 rtsp_close_streams(rt);
1815 static int sdp_read_close(AVFormatContext *s)
1817 RTSPState *rt = s->priv_data;
1818 rtsp_close_streams(rt);
1822 AVInputFormat sdp_demuxer = {
1824 NULL_IF_CONFIG_SMALL("SDP"),