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 get_word_sep(buf, sizeof(buf), "/", &p);
107 if (payload_type >= RTP_PT_PRIVATE) {
108 RTPDynamicProtocolHandler *handler;
109 for (handler = RTPFirstDynamicPayloadHandler;
110 handler; handler = handler->next) {
111 if (!strcasecmp(buf, handler->enc_name) &&
112 codec->codec_type == handler->codec_type) {
113 codec->codec_id = handler->codec_id;
114 rtsp_st->dynamic_handler = handler;
116 rtsp_st->dynamic_protocol_context = handler->open();
121 /* We are in a standard case
122 * (from http://www.iana.org/assignments/rtp-parameters). */
123 /* search into AVRtpPayloadTypes[] */
124 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
127 c = avcodec_find_decoder(codec->codec_id);
131 c_name = (char *) NULL;
134 get_word_sep(buf, sizeof(buf), "/", &p);
136 switch (codec->codec_type) {
137 case CODEC_TYPE_AUDIO:
138 av_log(s, AV_LOG_DEBUG, "audio codec set to: %s\n", c_name);
139 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
140 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
142 codec->sample_rate = i;
143 get_word_sep(buf, sizeof(buf), "/", &p);
147 // TODO: there is a bug here; if it is a mono stream, and
148 // less than 22000Hz, faad upconverts to stereo and twice
149 // the frequency. No problem, but the sample rate is being
150 // set here by the sdp line. Patch on its way. (rdm)
152 av_log(s, AV_LOG_DEBUG, "audio samplerate set to: %i\n",
154 av_log(s, AV_LOG_DEBUG, "audio channels set to: %i\n",
157 case CODEC_TYPE_VIDEO:
158 av_log(s, AV_LOG_DEBUG, "video codec set to: %s\n", c_name);
169 /* return the length and optionally the data */
170 static int hex_to_data(uint8_t *data, const char *p)
180 c = toupper((unsigned char) *p++);
181 if (c >= '0' && c <= '9')
183 else if (c >= 'A' && c <= 'F')
198 static void sdp_parse_fmtp_config(AVCodecContext * codec, void *ctx,
199 char *attr, char *value)
201 switch (codec->codec_id) {
204 if (!strcmp(attr, "config")) {
205 /* decode the hexa encoded parameter */
206 int len = hex_to_data(NULL, value);
207 if (codec->extradata)
208 av_free(codec->extradata);
209 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
210 if (!codec->extradata)
212 codec->extradata_size = len;
213 hex_to_data(codec->extradata, value);
216 case CODEC_ID_VORBIS:
217 ff_vorbis_parse_fmtp_config(codec, ctx, attr, value);
231 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
232 #define ATTR_NAME_TYPE_INT 0
233 #define ATTR_NAME_TYPE_STR 1
234 static const AttrNameMap attr_names[]=
236 { "SizeLength", ATTR_NAME_TYPE_INT,
237 offsetof(RTPPayloadData, sizelength) },
238 { "IndexLength", ATTR_NAME_TYPE_INT,
239 offsetof(RTPPayloadData, indexlength) },
240 { "IndexDeltaLength", ATTR_NAME_TYPE_INT,
241 offsetof(RTPPayloadData, indexdeltalength) },
242 { "profile-level-id", ATTR_NAME_TYPE_INT,
243 offsetof(RTPPayloadData, profile_level_id) },
244 { "StreamType", ATTR_NAME_TYPE_INT,
245 offsetof(RTPPayloadData, streamtype) },
246 { "mode", ATTR_NAME_TYPE_STR,
247 offsetof(RTPPayloadData, mode) },
251 /* parse the attribute line from the fmtp a line of an sdp resonse. This
252 * is broken out as a function because it is used in rtp_h264.c, which is
254 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size,
255 char *value, int value_size)
259 get_word_sep(attr, attr_size, "=", p);
262 get_word_sep(value, value_size, ";", p);
270 /* parse a SDP line and save stream attributes */
271 static void sdp_parse_fmtp(AVStream *st, const char *p)
274 /* Vorbis setup headers can be up to 12KB and are sent base64
275 * encoded, giving a 12KB * (4/3) = 16KB FMTP line. */
278 RTSPStream *rtsp_st = st->priv_data;
279 AVCodecContext *codec = st->codec;
280 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
282 /* loop on each attribute */
283 while (rtsp_next_attr_and_value(&p, attr, sizeof(attr),
284 value, sizeof(value))) {
285 /* grab the codec extra_data from the config parameter of the fmtp
287 sdp_parse_fmtp_config(codec, rtsp_st->dynamic_protocol_context,
289 /* Looking for a known attribute */
290 for (i = 0; attr_names[i].str; ++i) {
291 if (!strcasecmp(attr, attr_names[i].str)) {
292 if (attr_names[i].type == ATTR_NAME_TYPE_INT) {
293 *(int *)((char *)rtp_payload_data +
294 attr_names[i].offset) = atoi(value);
295 } else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
296 *(char **)((char *)rtp_payload_data +
297 attr_names[i].offset) = av_strdup(value);
303 /** Parse a string p in the form of Range:npt=xx-xx, and determine the start
305 * Used for seeking in the rtp stream.
307 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
312 if (!av_stristart(p, "npt=", &p))
315 *start = AV_NOPTS_VALUE;
316 *end = AV_NOPTS_VALUE;
318 get_word_sep(buf, sizeof(buf), "-", &p);
319 *start = parse_date(buf, 1);
322 get_word_sep(buf, sizeof(buf), "-", &p);
323 *end = parse_date(buf, 1);
325 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
326 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
329 typedef struct SDPParseState {
331 struct in_addr default_ip;
333 int skip_media; ///< set if an unknown m= line occurs
336 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
337 int letter, const char *buf)
339 RTSPState *rt = s->priv_data;
340 char buf1[64], st_type[64];
342 enum CodecType codec_type;
346 struct in_addr sdp_ip;
349 dprintf(s, "sdp: %c='%s'\n", letter, buf);
352 if (s1->skip_media && letter != 'm')
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IN") != 0)
359 get_word(buf1, sizeof(buf1), &p);
360 if (strcmp(buf1, "IP4") != 0)
362 get_word_sep(buf1, sizeof(buf1), "/", &p);
363 if (inet_aton(buf1, &sdp_ip) == 0)
368 get_word_sep(buf1, sizeof(buf1), "/", &p);
371 if (s->nb_streams == 0) {
372 s1->default_ip = sdp_ip;
373 s1->default_ttl = ttl;
375 st = s->streams[s->nb_streams - 1];
376 rtsp_st = st->priv_data;
377 rtsp_st->sdp_ip = sdp_ip;
378 rtsp_st->sdp_ttl = ttl;
382 av_metadata_set(&s->metadata, "title", p);
385 if (s->nb_streams == 0) {
386 av_metadata_set(&s->metadata, "comment", p);
393 get_word(st_type, sizeof(st_type), &p);
394 if (!strcmp(st_type, "audio")) {
395 codec_type = CODEC_TYPE_AUDIO;
396 } else if (!strcmp(st_type, "video")) {
397 codec_type = CODEC_TYPE_VIDEO;
398 } else if (!strcmp(st_type, "application")) {
399 codec_type = CODEC_TYPE_DATA;
404 rtsp_st = av_mallocz(sizeof(RTSPStream));
407 rtsp_st->stream_index = -1;
408 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
410 rtsp_st->sdp_ip = s1->default_ip;
411 rtsp_st->sdp_ttl = s1->default_ttl;
413 get_word(buf1, sizeof(buf1), &p); /* port */
414 rtsp_st->sdp_port = atoi(buf1);
416 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
418 /* XXX: handle list of formats */
419 get_word(buf1, sizeof(buf1), &p); /* format list */
420 rtsp_st->sdp_payload_type = atoi(buf1);
422 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
423 /* no corresponding stream */
425 st = av_new_stream(s, 0);
428 st->priv_data = rtsp_st;
429 rtsp_st->stream_index = st->index;
430 st->codec->codec_type = codec_type;
431 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
432 /* if standard payload type, we can find the codec right now */
433 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
436 /* put a default control url */
437 av_strlcpy(rtsp_st->control_url, s->filename,
438 sizeof(rtsp_st->control_url));
441 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
443 /* get the control url */
444 st = s->streams[s->nb_streams - 1];
445 rtsp_st = st->priv_data;
447 /* XXX: may need to add full url resolution */
448 url_split(proto, sizeof(proto), NULL, 0, NULL, 0,
450 if (proto[0] == '\0') {
451 /* relative control URL */
452 av_strlcat(rtsp_st->control_url, "/",
453 sizeof(rtsp_st->control_url));
454 av_strlcat(rtsp_st->control_url, p,
455 sizeof(rtsp_st->control_url));
457 av_strlcpy(rtsp_st->control_url, p,
458 sizeof(rtsp_st->control_url));
459 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
460 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
461 get_word(buf1, sizeof(buf1), &p);
462 payload_type = atoi(buf1);
463 st = s->streams[s->nb_streams - 1];
464 rtsp_st = st->priv_data;
465 sdp_parse_rtpmap(s, st->codec, rtsp_st, payload_type, p);
466 } else if (av_strstart(p, "fmtp:", &p)) {
467 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
468 get_word(buf1, sizeof(buf1), &p);
469 payload_type = atoi(buf1);
470 for (i = 0; i < s->nb_streams; i++) {
472 rtsp_st = st->priv_data;
473 if (rtsp_st->sdp_payload_type == payload_type) {
474 if (!(rtsp_st->dynamic_handler &&
475 rtsp_st->dynamic_handler->parse_sdp_a_line &&
476 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
477 i, rtsp_st->dynamic_protocol_context, buf)))
478 sdp_parse_fmtp(st, p);
481 } else if (av_strstart(p, "framesize:", &p)) {
482 // let dynamic protocol handlers have a stab at the line.
483 get_word(buf1, sizeof(buf1), &p);
484 payload_type = atoi(buf1);
485 for (i = 0; i < s->nb_streams; i++) {
487 rtsp_st = st->priv_data;
488 if (rtsp_st->sdp_payload_type == payload_type &&
489 rtsp_st->dynamic_handler &&
490 rtsp_st->dynamic_handler->parse_sdp_a_line)
491 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i,
492 rtsp_st->dynamic_protocol_context, buf);
494 } else if (av_strstart(p, "range:", &p)) {
497 // this is so that seeking on a streamed file can work.
498 rtsp_parse_range_npt(p, &start, &end);
499 s->start_time = start;
500 /* AV_NOPTS_VALUE means live broadcast (and can't seek) */
501 s->duration = (end == AV_NOPTS_VALUE) ?
502 AV_NOPTS_VALUE : end - start;
503 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
505 rt->transport = RTSP_TRANSPORT_RDT;
507 if (rt->server_type == RTSP_SERVER_WMS)
508 ff_wms_parse_sdp_a_line(s, p);
509 if (s->nb_streams > 0) {
510 if (rt->server_type == RTSP_SERVER_REAL)
511 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
513 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
514 if (rtsp_st->dynamic_handler &&
515 rtsp_st->dynamic_handler->parse_sdp_a_line)
516 rtsp_st->dynamic_handler->parse_sdp_a_line(s,
518 rtsp_st->dynamic_protocol_context, buf);
525 static int sdp_parse(AVFormatContext *s, const char *content)
529 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
530 * contain long SDP lines containing complete ASF Headers (several
531 * kB) or arrays of MDPR (RM stream descriptor) headers plus
532 * "rulebooks" describing their properties. Therefore, the SDP line
535 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
537 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
539 memset(s1, 0, sizeof(SDPParseState));
550 /* get the content */
552 while (*p != '\n' && *p != '\r' && *p != '\0') {
553 if ((q - buf) < sizeof(buf) - 1)
558 sdp_parse_line(s, s1, letter, buf);
560 while (*p != '\n' && *p != '\0')
568 /* close and free RTSP streams */
569 static void rtsp_close_streams(RTSPState *rt)
574 for (i = 0; i < rt->nb_rtsp_streams; i++) {
575 rtsp_st = rt->rtsp_streams[i];
577 if (rtsp_st->transport_priv) {
578 if (rt->transport == RTSP_TRANSPORT_RDT)
579 ff_rdt_parse_close(rtsp_st->transport_priv);
581 rtp_parse_close(rtsp_st->transport_priv);
583 if (rtsp_st->rtp_handle)
584 url_close(rtsp_st->rtp_handle);
585 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
586 rtsp_st->dynamic_handler->close(
587 rtsp_st->dynamic_protocol_context);
590 av_free(rt->rtsp_streams);
592 av_close_input_stream (rt->asf_ctx);
595 av_freep(&rt->auth_b64);
598 static int rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
600 RTSPState *rt = s->priv_data;
603 /* open the RTP context */
604 if (rtsp_st->stream_index >= 0)
605 st = s->streams[rtsp_st->stream_index];
607 s->ctx_flags |= AVFMTCTX_NOHEADER;
609 if (rt->transport == RTSP_TRANSPORT_RDT)
610 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
611 rtsp_st->dynamic_protocol_context,
612 rtsp_st->dynamic_handler);
614 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
615 rtsp_st->sdp_payload_type,
616 &rtsp_st->rtp_payload_data);
618 if (!rtsp_st->transport_priv) {
619 return AVERROR(ENOMEM);
620 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
621 if (rtsp_st->dynamic_handler) {
622 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
623 rtsp_st->dynamic_protocol_context,
624 rtsp_st->dynamic_handler);
631 #if CONFIG_RTSP_DEMUXER
632 static int rtsp_probe(AVProbeData *p)
634 if (av_strstart(p->filename, "rtsp:", NULL))
635 return AVPROBE_SCORE_MAX;
639 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
646 v = strtol(p, (char **)&p, 10);
650 v = strtol(p, (char **)&p, 10);
659 /* XXX: only one transport specification is parsed */
660 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
662 char transport_protocol[16];
664 char lower_transport[16];
666 RTSPTransportField *th;
669 reply->nb_transports = 0;
676 th = &reply->transports[reply->nb_transports];
678 get_word_sep(transport_protocol, sizeof(transport_protocol),
680 if (!strcasecmp (transport_protocol, "rtp")) {
681 get_word_sep(profile, sizeof(profile), "/;,", &p);
682 lower_transport[0] = '\0';
683 /* rtp/avp/<protocol> */
685 get_word_sep(lower_transport, sizeof(lower_transport),
688 th->transport = RTSP_TRANSPORT_RTP;
689 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
690 !strcasecmp (transport_protocol, "x-real-rdt")) {
691 /* x-pn-tng/<protocol> */
692 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
694 th->transport = RTSP_TRANSPORT_RDT;
696 if (!strcasecmp(lower_transport, "TCP"))
697 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
699 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
703 /* get each parameter */
704 while (*p != '\0' && *p != ',') {
705 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
706 if (!strcmp(parameter, "port")) {
709 rtsp_parse_range(&th->port_min, &th->port_max, &p);
711 } else if (!strcmp(parameter, "client_port")) {
714 rtsp_parse_range(&th->client_port_min,
715 &th->client_port_max, &p);
717 } else if (!strcmp(parameter, "server_port")) {
720 rtsp_parse_range(&th->server_port_min,
721 &th->server_port_max, &p);
723 } else if (!strcmp(parameter, "interleaved")) {
726 rtsp_parse_range(&th->interleaved_min,
727 &th->interleaved_max, &p);
729 } else if (!strcmp(parameter, "multicast")) {
730 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
731 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
732 } else if (!strcmp(parameter, "ttl")) {
735 th->ttl = strtol(p, (char **)&p, 10);
737 } else if (!strcmp(parameter, "destination")) {
738 struct in_addr ipaddr;
742 get_word_sep(buf, sizeof(buf), ";,", &p);
743 if (inet_aton(buf, &ipaddr))
744 th->destination = ntohl(ipaddr.s_addr);
747 while (*p != ';' && *p != '\0' && *p != ',')
755 reply->nb_transports++;
759 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
763 /* NOTE: we do case independent match for broken servers */
765 if (av_stristart(p, "Session:", &p)) {
767 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
768 if (av_stristart(p, ";timeout=", &p) &&
769 (t = strtol(p, NULL, 10)) > 0) {
772 } else if (av_stristart(p, "Content-Length:", &p)) {
773 reply->content_length = strtol(p, NULL, 10);
774 } else if (av_stristart(p, "Transport:", &p)) {
775 rtsp_parse_transport(reply, p);
776 } else if (av_stristart(p, "CSeq:", &p)) {
777 reply->seq = strtol(p, NULL, 10);
778 } else if (av_stristart(p, "Range:", &p)) {
779 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
780 } else if (av_stristart(p, "RealChallenge1:", &p)) {
782 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
783 } else if (av_stristart(p, "Server:", &p)) {
785 av_strlcpy(reply->server, p, sizeof(reply->server));
786 } else if (av_stristart(p, "Notice:", &p) ||
787 av_stristart(p, "X-Notice:", &p)) {
788 reply->notice = strtol(p, NULL, 10);
789 } else if (av_stristart(p, "Location:", &p)) {
791 av_strlcpy(reply->location, p , sizeof(reply->location));
795 /* skip a RTP/TCP interleaved packet */
796 static void rtsp_skip_packet(AVFormatContext *s)
798 RTSPState *rt = s->priv_data;
802 ret = url_read_complete(rt->rtsp_hd, buf, 3);
805 len = AV_RB16(buf + 1);
807 dprintf(s, "skipping RTP packet len=%d\n", len);
812 if (len1 > sizeof(buf))
814 ret = url_read_complete(rt->rtsp_hd, buf, len1);
822 * Read a RTSP message from the server, or prepare to read data
823 * packets if we're reading data interleaved over the TCP/RTSP
824 * connection as well.
826 * @param s RTSP demuxer context
827 * @param reply pointer where the RTSP message header will be stored
828 * @param content_ptr pointer where the RTSP message body, if any, will
829 * be stored (length is in reply)
830 * @param return_on_interleaved_data whether the function may return if we
831 * encounter a data marker ('$'), which precedes data
832 * packets over interleaved TCP/RTSP connections. If this
833 * is set, this function will return 1 after encountering
834 * a '$'. If it is not set, the function will skip any
835 * data packets (if they are encountered), until a reply
836 * has been fully parsed. If no more data is available
837 * without parsing a reply, it will return an error.
839 * @returns 1 if a data packets is ready to be received, -1 on error,
842 static int rtsp_read_reply(AVFormatContext *s, RTSPMessageHeader *reply,
843 unsigned char **content_ptr,
844 int return_on_interleaved_data)
846 RTSPState *rt = s->priv_data;
847 char buf[4096], buf1[1024], *q;
850 int ret, content_length, line_count = 0;
851 unsigned char *content = NULL;
853 memset(reply, 0, sizeof(*reply));
855 /* parse reply (XXX: use buffers) */
856 rt->last_reply[0] = '\0';
860 ret = url_read_complete(rt->rtsp_hd, &ch, 1);
862 dprintf(s, "ret=%d c=%02x [%c]\n", ret, ch, ch);
869 /* XXX: only parse it if first char on line ? */
870 if (return_on_interleaved_data) {
874 } else if (ch != '\r') {
875 if ((q - buf) < sizeof(buf) - 1)
881 dprintf(s, "line='%s'\n", buf);
883 /* test if last line */
887 if (line_count == 0) {
889 get_word(buf1, sizeof(buf1), &p);
890 get_word(buf1, sizeof(buf1), &p);
891 reply->status_code = atoi(buf1);
893 rtsp_parse_line(reply, p);
894 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
895 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
900 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
901 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
903 content_length = reply->content_length;
904 if (content_length > 0) {
905 /* leave some room for a trailing '\0' (useful for simple parsing) */
906 content = av_malloc(content_length + 1);
907 (void)url_read_complete(rt->rtsp_hd, content, content_length);
908 content[content_length] = '\0';
911 *content_ptr = content;
916 if (reply->notice == 2101 /* End-of-Stream Reached */ ||
917 reply->notice == 2104 /* Start-of-Stream Reached */ ||
918 reply->notice == 2306 /* Continuous Feed Terminated */) {
919 rt->state = RTSP_STATE_IDLE;
920 } else if (reply->notice >= 4400 && reply->notice < 5500) {
921 return AVERROR(EIO); /* data or server error */
922 } else if (reply->notice == 2401 /* Ticket Expired */ ||
923 (reply->notice >= 5500 && reply->notice < 5600) /* end of term */ )
924 return AVERROR(EPERM);
929 static void rtsp_send_cmd_async(AVFormatContext *s,
930 const char *cmd, RTSPMessageHeader *reply,
931 unsigned char **content_ptr)
933 RTSPState *rt = s->priv_data;
934 char buf[4096], buf1[1024];
937 av_strlcpy(buf, cmd, sizeof(buf));
938 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
939 av_strlcat(buf, buf1, sizeof(buf));
940 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
941 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
942 av_strlcat(buf, buf1, sizeof(buf));
945 av_strlcatf(buf, sizeof(buf),
946 "Authorization: Basic %s\r\n",
948 av_strlcat(buf, "\r\n", sizeof(buf));
950 dprintf(s, "Sending:\n%s--\n", buf);
952 url_write(rt->rtsp_hd, buf, strlen(buf));
953 rt->last_cmd_time = av_gettime();
956 static void rtsp_send_cmd(AVFormatContext *s,
957 const char *cmd, RTSPMessageHeader *reply,
958 unsigned char **content_ptr)
960 rtsp_send_cmd_async(s, cmd, reply, content_ptr);
962 rtsp_read_reply(s, reply, content_ptr, 0);
966 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
968 static int make_setup_request(AVFormatContext *s, const char *host, int port,
969 int lower_transport, const char *real_challenge)
971 RTSPState *rt = s->priv_data;
972 int rtx, j, i, err, interleave = 0;
974 RTSPMessageHeader reply1, *reply = &reply1;
976 const char *trans_pref;
978 if (rt->transport == RTSP_TRANSPORT_RDT)
979 trans_pref = "x-pn-tng";
981 trans_pref = "RTP/AVP";
983 /* default timeout: 1 minute */
986 /* for each stream, make the setup request */
987 /* XXX: we assume the same server is used for the control of each
990 for (j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
991 char transport[2048];
994 * WMS serves all UDP data over a single connection, the RTX, which
995 * isn't necessarily the first in the SDP but has to be the first
996 * to be set up, else the second/third SETUP will fail with a 461.
998 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
999 rt->server_type == RTSP_SERVER_WMS) {
1002 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
1003 int len = strlen(rt->rtsp_streams[rtx]->control_url);
1005 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4,
1009 if (rtx == rt->nb_rtsp_streams)
1010 return -1; /* no RTX found */
1011 rtsp_st = rt->rtsp_streams[rtx];
1013 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
1015 rtsp_st = rt->rtsp_streams[i];
1018 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
1021 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
1022 port = reply->transports[0].client_port_min;
1026 /* first try in specified port range */
1027 if (RTSP_RTP_PORT_MIN != 0) {
1028 while (j <= RTSP_RTP_PORT_MAX) {
1029 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d",
1031 /* we will use two ports per rtp stream (rtp and rtcp) */
1033 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0)
1039 /* then try on any port */
1040 if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1041 err = AVERROR_INVALIDDATA;
1047 port = rtp_get_local_port(rtsp_st->rtp_handle);
1049 snprintf(transport, sizeof(transport) - 1,
1050 "%s/UDP;", trans_pref);
1051 if (rt->server_type != RTSP_SERVER_REAL)
1052 av_strlcat(transport, "unicast;", sizeof(transport));
1053 av_strlcatf(transport, sizeof(transport),
1054 "client_port=%d", port);
1055 if (rt->transport == RTSP_TRANSPORT_RTP &&
1056 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1057 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1061 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1062 /** For WMS streams, the application streams are only used for
1063 * UDP. When trying to set it up for TCP streams, the server
1064 * will return an error. Therefore, we skip those streams. */
1065 if (rt->server_type == RTSP_SERVER_WMS &&
1066 s->streams[rtsp_st->stream_index]->codec->codec_type ==
1069 snprintf(transport, sizeof(transport) - 1,
1070 "%s/TCP;", trans_pref);
1071 if (rt->server_type == RTSP_SERVER_WMS)
1072 av_strlcat(transport, "unicast;", sizeof(transport));
1073 av_strlcatf(transport, sizeof(transport),
1074 "interleaved=%d-%d",
1075 interleave, interleave + 1);
1079 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1080 snprintf(transport, sizeof(transport) - 1,
1081 "%s/UDP;multicast", trans_pref);
1083 if (rt->server_type == RTSP_SERVER_REAL ||
1084 rt->server_type == RTSP_SERVER_WMS)
1085 av_strlcat(transport, ";mode=play", sizeof(transport));
1086 snprintf(cmd, sizeof(cmd),
1087 "SETUP %s RTSP/1.0\r\n"
1088 "Transport: %s\r\n",
1089 rtsp_st->control_url, transport);
1090 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1091 char real_res[41], real_csum[9];
1092 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1094 av_strlcatf(cmd, sizeof(cmd),
1096 "RealChallenge2: %s, sd=%s\r\n",
1097 rt->session_id, real_res, real_csum);
1099 rtsp_send_cmd(s, cmd, reply, NULL);
1100 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1103 } else if (reply->status_code != RTSP_STATUS_OK ||
1104 reply->nb_transports != 1) {
1105 err = AVERROR_INVALIDDATA;
1109 /* XXX: same protocol for all streams is required */
1111 if (reply->transports[0].lower_transport != rt->lower_transport ||
1112 reply->transports[0].transport != rt->transport) {
1113 err = AVERROR_INVALIDDATA;
1117 rt->lower_transport = reply->transports[0].lower_transport;
1118 rt->transport = reply->transports[0].transport;
1121 /* close RTP connection if not choosen */
1122 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1123 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1124 url_close(rtsp_st->rtp_handle);
1125 rtsp_st->rtp_handle = NULL;
1128 switch(reply->transports[0].lower_transport) {
1129 case RTSP_LOWER_TRANSPORT_TCP:
1130 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1131 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1134 case RTSP_LOWER_TRANSPORT_UDP: {
1137 /* XXX: also use address if specified */
1138 snprintf(url, sizeof(url), "rtp://%s:%d",
1139 host, reply->transports[0].server_port_min);
1140 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1141 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1142 err = AVERROR_INVALIDDATA;
1147 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST: {
1152 if (reply->transports[0].destination) {
1153 in.s_addr = htonl(reply->transports[0].destination);
1154 port = reply->transports[0].port_min;
1155 ttl = reply->transports[0].ttl;
1157 in = rtsp_st->sdp_ip;
1158 port = rtsp_st->sdp_port;
1159 ttl = rtsp_st->sdp_ttl;
1161 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1162 inet_ntoa(in), port, ttl);
1163 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1164 err = AVERROR_INVALIDDATA;
1171 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1175 if (reply->timeout > 0)
1176 rt->timeout = reply->timeout;
1178 if (rt->server_type == RTSP_SERVER_REAL)
1179 rt->need_subscription = 1;
1184 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1185 if (rt->rtsp_streams[i]->rtp_handle) {
1186 url_close(rt->rtsp_streams[i]->rtp_handle);
1187 rt->rtsp_streams[i]->rtp_handle = NULL;
1193 static int rtsp_read_play(AVFormatContext *s)
1195 RTSPState *rt = s->priv_data;
1196 RTSPMessageHeader reply1, *reply = &reply1;
1199 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1201 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1202 if (rt->state == RTSP_STATE_PAUSED) {
1203 snprintf(cmd, sizeof(cmd),
1204 "PLAY %s RTSP/1.0\r\n",
1207 snprintf(cmd, sizeof(cmd),
1208 "PLAY %s RTSP/1.0\r\n"
1209 "Range: npt=%0.3f-\r\n",
1211 (double)rt->seek_timestamp / AV_TIME_BASE);
1213 rtsp_send_cmd(s, cmd, reply, NULL);
1214 if (reply->status_code != RTSP_STATUS_OK) {
1218 rt->state = RTSP_STATE_PLAYING;
1222 static int rtsp_read_header(AVFormatContext *s,
1223 AVFormatParameters *ap)
1225 RTSPState *rt = s->priv_data;
1226 char host[1024], path[1024], tcpname[1024], cmd[2048], auth[128];
1227 char *option_list, *option, *filename;
1228 URLContext *rtsp_hd;
1230 RTSPMessageHeader reply1, *reply = &reply1;
1231 unsigned char *content = NULL;
1232 int lower_transport_mask = 0;
1233 char real_challenge[64];
1235 /* extract hostname and port */
1236 url_split(NULL, 0, auth, sizeof(auth),
1237 host, sizeof(host), &port, path, sizeof(path), s->filename);
1239 int auth_len = strlen(auth), b64_len = ((auth_len + 2) / 3) * 4 + 1;
1241 if (!(rt->auth_b64 = av_malloc(b64_len)))
1242 return AVERROR(ENOMEM);
1243 if (!av_base64_encode(rt->auth_b64, b64_len, auth, auth_len)) {
1244 err = AVERROR(EINVAL);
1249 port = RTSP_DEFAULT_PORT;
1251 /* search for options */
1252 option_list = strchr(path, '?');
1254 filename = strchr(s->filename, '?');
1255 while (option_list) {
1256 /* move the option pointer */
1257 option = ++option_list;
1258 option_list = strchr(option_list, '&');
1262 /* handle the options */
1263 if (!strcmp(option, "udp")) {
1264 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1265 } else if (!strcmp(option, "multicast")) {
1266 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1267 } else if (!strcmp(option, "tcp")) {
1268 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1270 strcpy(++filename, option);
1271 filename += strlen(option);
1272 if (option_list) *filename = '&';
1278 if (!lower_transport_mask)
1279 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1281 /* open the tcp connexion */
1282 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1283 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) {
1287 rt->rtsp_hd = rtsp_hd;
1290 /* request options supported by the server; this also detects server
1292 for (rt->server_type = RTSP_SERVER_RTP;;) {
1293 snprintf(cmd, sizeof(cmd),
1294 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1295 if (rt->server_type == RTSP_SERVER_REAL)
1298 * The following entries are required for proper
1299 * streaming from a Realmedia server. They are
1300 * interdependent in some way although we currently
1301 * don't quite understand how. Values were copied
1302 * from mplayer SVN r23589.
1303 * @param CompanyID is a 16-byte ID in base64
1304 * @param ClientChallenge is a 16-byte ID in hex
1306 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1307 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1308 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1309 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1311 rtsp_send_cmd(s, cmd, reply, NULL);
1312 if (reply->status_code != RTSP_STATUS_OK) {
1313 err = AVERROR_INVALIDDATA;
1317 /* detect server type if not standard-compliant RTP */
1318 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1319 rt->server_type = RTSP_SERVER_REAL;
1321 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1322 rt->server_type = RTSP_SERVER_WMS;
1323 } else if (rt->server_type == RTSP_SERVER_REAL)
1324 strcpy(real_challenge, reply->real_challenge);
1328 /* describe the stream */
1329 snprintf(cmd, sizeof(cmd),
1330 "DESCRIBE %s RTSP/1.0\r\n"
1331 "Accept: application/sdp\r\n",
1333 if (rt->server_type == RTSP_SERVER_REAL) {
1335 * The Require: attribute is needed for proper streaming from
1336 * Realmedia servers.
1339 "Require: com.real.retain-entity-for-setup\r\n",
1342 rtsp_send_cmd(s, cmd, reply, &content);
1344 err = AVERROR_INVALIDDATA;
1347 if (reply->status_code != RTSP_STATUS_OK) {
1348 err = AVERROR_INVALIDDATA;
1352 /* now we got the SDP description, we parse it */
1353 ret = sdp_parse(s, (const char *)content);
1356 err = AVERROR_INVALIDDATA;
1361 int lower_transport = ff_log2_tab[lower_transport_mask &
1362 ~(lower_transport_mask - 1)];
1364 err = make_setup_request(s, host, port, lower_transport,
1365 rt->server_type == RTSP_SERVER_REAL ?
1366 real_challenge : NULL);
1369 lower_transport_mask &= ~(1 << lower_transport);
1370 if (lower_transport_mask == 0 && err == 1) {
1371 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1376 rt->state = RTSP_STATE_IDLE;
1377 rt->seek_timestamp = 0; /* default is to start stream at position zero */
1378 if (ap->initial_pause) {
1379 /* do not start immediately */
1381 if (rtsp_read_play(s) < 0) {
1382 err = AVERROR_INVALIDDATA;
1388 rtsp_close_streams(rt);
1390 url_close(rt->rtsp_hd);
1391 if (reply->status_code >=300 && reply->status_code < 400) {
1392 av_strlcpy(s->filename, reply->location, sizeof(s->filename));
1393 av_log(s, AV_LOG_INFO, "Status %d: Redirecting to %s\n",
1401 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1402 uint8_t *buf, int buf_size)
1404 RTSPState *rt = s->priv_data;
1405 RTSPStream *rtsp_st;
1407 int fd, fd_max, n, i, ret, tcp_fd;
1411 if (url_interrupt_cb())
1412 return AVERROR(EINTR);
1415 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1416 FD_SET(tcp_fd, &rfds);
1421 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1422 rtsp_st = rt->rtsp_streams[i];
1423 if (rtsp_st->rtp_handle) {
1424 /* currently, we cannot probe RTCP handle because of
1425 * blocking restrictions */
1426 fd = url_get_file_handle(rtsp_st->rtp_handle);
1433 tv.tv_usec = 100 * 1000;
1434 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1436 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1437 rtsp_st = rt->rtsp_streams[i];
1438 if (rtsp_st->rtp_handle) {
1439 fd = url_get_file_handle(rtsp_st->rtp_handle);
1440 if (FD_ISSET(fd, &rfds)) {
1441 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1443 *prtsp_st = rtsp_st;
1449 #if CONFIG_RTSP_DEMUXER
1450 if (FD_ISSET(tcp_fd, &rfds)) {
1451 RTSPMessageHeader reply;
1453 rtsp_read_reply(s, &reply, NULL, 0);
1454 /* XXX: parse message */
1455 if (rt->state != RTSP_STATE_PLAYING)
1463 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1464 uint8_t *buf, int buf_size)
1466 RTSPState *rt = s->priv_data;
1467 int id, len, i, ret;
1468 RTSPStream *rtsp_st;
1470 #ifdef DEBUG_RTP_TCP
1471 dprintf(s, "tcp_read_packet:\n");
1475 RTSPMessageHeader reply;
1477 ret = rtsp_read_reply(s, &reply, NULL, 1);
1480 if (ret == 1) /* received '$' */
1482 /* XXX: parse message */
1483 if (rt->state != RTSP_STATE_PLAYING)
1486 ret = url_read_complete(rt->rtsp_hd, buf, 3);
1490 len = AV_RB16(buf + 1);
1491 #ifdef DEBUG_RTP_TCP
1492 dprintf(s, "id=%d len=%d\n", id, len);
1494 if (len > buf_size || len < 12)
1497 ret = url_read_complete(rt->rtsp_hd, buf, len);
1500 if (rt->transport == RTSP_TRANSPORT_RDT &&
1501 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1504 /* find the matching stream */
1505 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1506 rtsp_st = rt->rtsp_streams[i];
1507 if (id >= rtsp_st->interleaved_min &&
1508 id <= rtsp_st->interleaved_max)
1513 *prtsp_st = rtsp_st;
1517 static int rtsp_fetch_packet(AVFormatContext *s, AVPacket *pkt)
1519 RTSPState *rt = s->priv_data;
1521 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1522 RTSPStream *rtsp_st;
1524 /* get next frames from the same RTP packet */
1525 if (rt->cur_transport_priv) {
1526 if (rt->transport == RTSP_TRANSPORT_RDT) {
1527 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1529 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1531 rt->cur_transport_priv = NULL;
1533 } else if (ret == 1) {
1536 rt->cur_transport_priv = NULL;
1539 /* read next RTP packet */
1541 switch(rt->lower_transport) {
1543 #if CONFIG_RTSP_DEMUXER
1544 case RTSP_LOWER_TRANSPORT_TCP:
1545 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1548 case RTSP_LOWER_TRANSPORT_UDP:
1549 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1550 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1551 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1552 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1559 if (rt->transport == RTSP_TRANSPORT_RDT) {
1560 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1562 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1566 /* more packets may follow, so we save the RTP context */
1567 rt->cur_transport_priv = rtsp_st->transport_priv;
1572 static int rtsp_read_packet(AVFormatContext *s, AVPacket *pkt)
1574 RTSPState *rt = s->priv_data;
1576 RTSPMessageHeader reply1, *reply = &reply1;
1579 if (rt->server_type == RTSP_SERVER_REAL) {
1581 enum AVDiscard cache[MAX_STREAMS];
1583 for (i = 0; i < s->nb_streams; i++)
1584 cache[i] = s->streams[i]->discard;
1586 if (!rt->need_subscription) {
1587 if (memcmp (cache, rt->real_setup_cache,
1588 sizeof(enum AVDiscard) * s->nb_streams)) {
1589 av_strlcatf(cmd, sizeof(cmd),
1590 "SET_PARAMETER %s RTSP/1.0\r\n"
1591 "Unsubscribe: %s\r\n",
1592 s->filename, rt->last_subscription);
1593 rtsp_send_cmd(s, cmd, reply, NULL);
1594 if (reply->status_code != RTSP_STATUS_OK)
1595 return AVERROR_INVALIDDATA;
1596 rt->need_subscription = 1;
1600 if (rt->need_subscription) {
1601 int r, rule_nr, first = 1;
1603 memcpy(rt->real_setup_cache, cache,
1604 sizeof(enum AVDiscard) * s->nb_streams);
1605 rt->last_subscription[0] = 0;
1607 snprintf(cmd, sizeof(cmd),
1608 "SET_PARAMETER %s RTSP/1.0\r\n"
1611 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1613 for (r = 0; r < s->nb_streams; r++) {
1614 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1615 if (s->streams[r]->discard != AVDISCARD_ALL) {
1617 av_strlcat(rt->last_subscription, ",",
1618 sizeof(rt->last_subscription));
1619 ff_rdt_subscribe_rule(
1620 rt->last_subscription,
1621 sizeof(rt->last_subscription), i, rule_nr);
1628 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1629 rtsp_send_cmd(s, cmd, reply, NULL);
1630 if (reply->status_code != RTSP_STATUS_OK)
1631 return AVERROR_INVALIDDATA;
1632 rt->need_subscription = 0;
1634 if (rt->state == RTSP_STATE_PLAYING)
1639 ret = rtsp_fetch_packet(s, pkt);
1643 /* send dummy request to keep TCP connection alive */
1644 if ((rt->server_type == RTSP_SERVER_WMS ||
1645 rt->server_type == RTSP_SERVER_REAL) &&
1646 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1647 if (rt->server_type == RTSP_SERVER_WMS) {
1648 snprintf(cmd, sizeof(cmd) - 1,
1649 "GET_PARAMETER %s RTSP/1.0\r\n",
1651 rtsp_send_cmd_async(s, cmd, reply, NULL);
1653 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n",
1661 /* pause the stream */
1662 static int rtsp_read_pause(AVFormatContext *s)
1664 RTSPState *rt = s->priv_data;
1665 RTSPMessageHeader reply1, *reply = &reply1;
1670 if (rt->state != RTSP_STATE_PLAYING)
1672 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1673 snprintf(cmd, sizeof(cmd),
1674 "PAUSE %s RTSP/1.0\r\n",
1676 rtsp_send_cmd(s, cmd, reply, NULL);
1677 if (reply->status_code != RTSP_STATUS_OK) {
1681 rt->state = RTSP_STATE_PAUSED;
1685 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1686 int64_t timestamp, int flags)
1688 RTSPState *rt = s->priv_data;
1690 rt->seek_timestamp = av_rescale_q(timestamp,
1691 s->streams[stream_index]->time_base,
1695 case RTSP_STATE_IDLE:
1697 case RTSP_STATE_PLAYING:
1698 if (rtsp_read_pause(s) != 0)
1700 rt->state = RTSP_STATE_SEEKING;
1701 if (rtsp_read_play(s) != 0)
1704 case RTSP_STATE_PAUSED:
1705 rt->state = RTSP_STATE_IDLE;
1711 static int rtsp_read_close(AVFormatContext *s)
1713 RTSPState *rt = s->priv_data;
1714 RTSPMessageHeader reply1, *reply = &reply1;
1718 /* NOTE: it is valid to flush the buffer here */
1719 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1720 url_fclose(&rt->rtsp_gb);
1723 snprintf(cmd, sizeof(cmd),
1724 "TEARDOWN %s RTSP/1.0\r\n",
1726 rtsp_send_cmd(s, cmd, reply, NULL);
1728 rtsp_close_streams(rt);
1729 url_close(rt->rtsp_hd);
1733 AVInputFormat rtsp_demuxer = {
1735 NULL_IF_CONFIG_SMALL("RTSP input format"),
1742 .flags = AVFMT_NOFILE,
1743 .read_play = rtsp_read_play,
1744 .read_pause = rtsp_read_pause,
1748 static int sdp_probe(AVProbeData *p1)
1750 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1752 /* we look for a line beginning "c=IN IP4" */
1753 while (p < p_end && *p != '\0') {
1754 if (p + sizeof("c=IN IP4") - 1 < p_end &&
1755 av_strstart(p, "c=IN IP4", NULL))
1756 return AVPROBE_SCORE_MAX / 2;
1758 while (p < p_end - 1 && *p != '\n') p++;
1767 #define SDP_MAX_SIZE 8192
1769 static int sdp_read_header(AVFormatContext *s, AVFormatParameters *ap)
1771 RTSPState *rt = s->priv_data;
1772 RTSPStream *rtsp_st;
1777 /* read the whole sdp file */
1778 /* XXX: better loading */
1779 content = av_malloc(SDP_MAX_SIZE);
1780 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1783 return AVERROR_INVALIDDATA;
1785 content[size] ='\0';
1787 sdp_parse(s, content);
1790 /* open each RTP stream */
1791 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1792 rtsp_st = rt->rtsp_streams[i];
1794 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1795 inet_ntoa(rtsp_st->sdp_ip),
1799 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1800 err = AVERROR_INVALIDDATA;
1803 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1808 rtsp_close_streams(rt);
1812 static int sdp_read_close(AVFormatContext *s)
1814 RTSPState *rt = s->priv_data;
1815 rtsp_close_streams(rt);
1819 AVInputFormat sdp_demuxer = {
1821 NULL_IF_CONFIG_SMALL("SDP"),