3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 /* needed by inet_aton() */
25 #include "libavutil/avstring.h"
26 #include "libavutil/intreadwrite.h"
31 #include <sys/select.h>
40 #include "rtp_vorbis.h"
43 //#define DEBUG_RTP_TCP
45 static int rtsp_read_play(AVFormatContext *s);
47 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
48 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
51 static int rtsp_probe(AVProbeData *p)
53 if (av_strstart(p->filename, "rtsp:", NULL))
54 return AVPROBE_SCORE_MAX;
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;
343 printf("sdp: %c='%s'\n", letter, buf);
347 if (s1->skip_media && letter != 'm')
351 get_word(buf1, sizeof(buf1), &p);
352 if (strcmp(buf1, "IN") != 0)
354 get_word(buf1, sizeof(buf1), &p);
355 if (strcmp(buf1, "IP4") != 0)
357 get_word_sep(buf1, sizeof(buf1), "/", &p);
358 if (inet_aton(buf1, &sdp_ip) == 0)
363 get_word_sep(buf1, sizeof(buf1), "/", &p);
366 if (s->nb_streams == 0) {
367 s1->default_ip = sdp_ip;
368 s1->default_ttl = ttl;
370 st = s->streams[s->nb_streams - 1];
371 rtsp_st = st->priv_data;
372 rtsp_st->sdp_ip = sdp_ip;
373 rtsp_st->sdp_ttl = ttl;
377 av_metadata_set(&s->metadata, "title", p);
380 if (s->nb_streams == 0) {
381 av_metadata_set(&s->metadata, "comment", p);
388 get_word(st_type, sizeof(st_type), &p);
389 if (!strcmp(st_type, "audio")) {
390 codec_type = CODEC_TYPE_AUDIO;
391 } else if (!strcmp(st_type, "video")) {
392 codec_type = CODEC_TYPE_VIDEO;
393 } else if (!strcmp(st_type, "application")) {
394 codec_type = CODEC_TYPE_DATA;
399 rtsp_st = av_mallocz(sizeof(RTSPStream));
402 rtsp_st->stream_index = -1;
403 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
405 rtsp_st->sdp_ip = s1->default_ip;
406 rtsp_st->sdp_ttl = s1->default_ttl;
408 get_word(buf1, sizeof(buf1), &p); /* port */
409 rtsp_st->sdp_port = atoi(buf1);
411 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
413 /* XXX: handle list of formats */
414 get_word(buf1, sizeof(buf1), &p); /* format list */
415 rtsp_st->sdp_payload_type = atoi(buf1);
417 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
418 /* no corresponding stream */
420 st = av_new_stream(s, 0);
423 st->priv_data = rtsp_st;
424 rtsp_st->stream_index = st->index;
425 st->codec->codec_type = codec_type;
426 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
427 /* if standard payload type, we can find the codec right now */
428 ff_rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
431 /* put a default control url */
432 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
435 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
437 /* get the control url */
438 st = s->streams[s->nb_streams - 1];
439 rtsp_st = st->priv_data;
441 /* XXX: may need to add full url resolution */
442 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
443 if (proto[0] == '\0') {
444 /* relative control URL */
445 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
446 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
448 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
450 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
451 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
452 get_word(buf1, sizeof(buf1), &p);
453 payload_type = atoi(buf1);
454 st = s->streams[s->nb_streams - 1];
455 rtsp_st = st->priv_data;
456 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
457 } else if (av_strstart(p, "fmtp:", &p)) {
458 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
459 get_word(buf1, sizeof(buf1), &p);
460 payload_type = atoi(buf1);
461 for(i = 0; i < s->nb_streams;i++) {
463 rtsp_st = st->priv_data;
464 if (rtsp_st->sdp_payload_type == payload_type) {
465 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
466 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
467 sdp_parse_fmtp(st, p);
470 sdp_parse_fmtp(st, p);
474 } else if(av_strstart(p, "framesize:", &p)) {
475 // let dynamic protocol handlers have a stab at the line.
476 get_word(buf1, sizeof(buf1), &p);
477 payload_type = atoi(buf1);
478 for(i = 0; i < s->nb_streams;i++) {
480 rtsp_st = st->priv_data;
481 if (rtsp_st->sdp_payload_type == payload_type) {
482 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
483 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
487 } else if(av_strstart(p, "range:", &p)) {
490 // this is so that seeking on a streamed file can work.
491 rtsp_parse_range_npt(p, &start, &end);
492 s->start_time= start;
493 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
494 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
496 rt->transport = RTSP_TRANSPORT_RDT;
498 if (rt->server_type == RTSP_SERVER_WMS)
499 ff_wms_parse_sdp_a_line(s, p);
500 if (s->nb_streams > 0) {
501 if (rt->server_type == RTSP_SERVER_REAL)
502 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
504 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
505 if (rtsp_st->dynamic_handler &&
506 rtsp_st->dynamic_handler->parse_sdp_a_line)
507 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
508 rtsp_st->dynamic_protocol_context, buf);
515 static int sdp_parse(AVFormatContext *s, const char *content)
519 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
520 * contain long SDP lines containing complete ASF Headers (several
521 * kB) or arrays of MDPR (RM stream descriptor) headers plus
522 * "rulebooks" describing their properties. Therefore, the SDP line
525 * The Vorbis FMTP line can be up to 16KB - see sdp_parse_fmtp. */
527 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
529 memset(s1, 0, sizeof(SDPParseState));
540 /* get the content */
542 while (*p != '\n' && *p != '\r' && *p != '\0') {
543 if ((q - buf) < sizeof(buf) - 1)
548 sdp_parse_line(s, s1, letter, buf);
550 while (*p != '\n' && *p != '\0')
558 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
565 v = strtol(p, (char **)&p, 10);
569 v = strtol(p, (char **)&p, 10);
578 /* XXX: only one transport specification is parsed */
579 static void rtsp_parse_transport(RTSPMessageHeader *reply, const char *p)
581 char transport_protocol[16];
583 char lower_transport[16];
585 RTSPTransportField *th;
588 reply->nb_transports = 0;
595 th = &reply->transports[reply->nb_transports];
597 get_word_sep(transport_protocol, sizeof(transport_protocol),
599 if (!strcasecmp (transport_protocol, "rtp")) {
600 get_word_sep(profile, sizeof(profile), "/;,", &p);
601 lower_transport[0] = '\0';
602 /* rtp/avp/<protocol> */
604 get_word_sep(lower_transport, sizeof(lower_transport),
607 th->transport = RTSP_TRANSPORT_RTP;
608 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
609 !strcasecmp (transport_protocol, "x-real-rdt")) {
610 /* x-pn-tng/<protocol> */
611 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
613 th->transport = RTSP_TRANSPORT_RDT;
615 if (!strcasecmp(lower_transport, "TCP"))
616 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
618 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
622 /* get each parameter */
623 while (*p != '\0' && *p != ',') {
624 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
625 if (!strcmp(parameter, "port")) {
628 rtsp_parse_range(&th->port_min, &th->port_max, &p);
630 } else if (!strcmp(parameter, "client_port")) {
633 rtsp_parse_range(&th->client_port_min,
634 &th->client_port_max, &p);
636 } else if (!strcmp(parameter, "server_port")) {
639 rtsp_parse_range(&th->server_port_min,
640 &th->server_port_max, &p);
642 } else if (!strcmp(parameter, "interleaved")) {
645 rtsp_parse_range(&th->interleaved_min,
646 &th->interleaved_max, &p);
648 } else if (!strcmp(parameter, "multicast")) {
649 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
650 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
651 } else if (!strcmp(parameter, "ttl")) {
654 th->ttl = strtol(p, (char **)&p, 10);
656 } else if (!strcmp(parameter, "destination")) {
657 struct in_addr ipaddr;
661 get_word_sep(buf, sizeof(buf), ";,", &p);
662 if (inet_aton(buf, &ipaddr))
663 th->destination = ntohl(ipaddr.s_addr);
666 while (*p != ';' && *p != '\0' && *p != ',')
674 reply->nb_transports++;
678 void rtsp_parse_line(RTSPMessageHeader *reply, const char *buf)
682 /* NOTE: we do case independent match for broken servers */
684 if (av_stristart(p, "Session:", &p)) {
686 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
687 if (av_stristart(p, ";timeout=", &p) &&
688 (t = strtol(p, NULL, 10)) > 0) {
691 } else if (av_stristart(p, "Content-Length:", &p)) {
692 reply->content_length = strtol(p, NULL, 10);
693 } else if (av_stristart(p, "Transport:", &p)) {
694 rtsp_parse_transport(reply, p);
695 } else if (av_stristart(p, "CSeq:", &p)) {
696 reply->seq = strtol(p, NULL, 10);
697 } else if (av_stristart(p, "Range:", &p)) {
698 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
699 } else if (av_stristart(p, "RealChallenge1:", &p)) {
701 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
702 } else if (av_stristart(p, "Server:", &p)) {
704 av_strlcpy(reply->server, p, sizeof(reply->server));
708 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
714 ret = url_read(h, buf+len, size-len);
722 /* skip a RTP/TCP interleaved packet */
723 static void rtsp_skip_packet(AVFormatContext *s)
725 RTSPState *rt = s->priv_data;
729 ret = url_readbuf(rt->rtsp_hd, buf, 3);
732 len = AV_RB16(buf + 1);
734 printf("skipping RTP packet len=%d\n", len);
739 if (len1 > sizeof(buf))
741 ret = url_readbuf(rt->rtsp_hd, buf, len1);
749 * Read a RTSP message from the server, or prepare to read data
750 * packets if we're reading data interleaved over the TCP/RTSP
751 * connection as well.
753 * @param s RTSP demuxer context
754 * @param reply pointer where the RTSP message header will be stored
755 * @param content_ptr pointer where the RTSP message body, if any, will
756 * be stored (length is in \p reply)
757 * @param return_on_interleaved_data whether the function may return if we
758 * encounter a data marker ('$'), which precedes data
759 * packets over interleaved TCP/RTSP connections. If this
760 * is set, this function will return 1 after encountering
761 * a '$'. If it is not set, the function will skip any
762 * data packets (if they are encountered), until a reply
763 * has been fully parsed. If no more data is available
764 * without parsing a reply, it will return an error.
766 * @returns 1 if a data packets is ready to be received, -1 on error,
770 rtsp_read_reply (AVFormatContext *s, RTSPMessageHeader *reply,
771 unsigned char **content_ptr, int return_on_interleaved_data)
773 RTSPState *rt = s->priv_data;
774 char buf[4096], buf1[1024], *q;
777 int ret, content_length, line_count = 0;
778 unsigned char *content = NULL;
780 memset(reply, 0, sizeof(*reply));
782 /* parse reply (XXX: use buffers) */
783 rt->last_reply[0] = '\0';
787 ret = url_readbuf(rt->rtsp_hd, &ch, 1);
789 printf("ret=%d c=%02x [%c]\n", ret, ch, ch);
796 /* XXX: only parse it if first char on line ? */
797 if (return_on_interleaved_data) {
801 } else if (ch != '\r') {
802 if ((q - buf) < sizeof(buf) - 1)
808 printf("line='%s'\n", buf);
810 /* test if last line */
814 if (line_count == 0) {
816 get_word(buf1, sizeof(buf1), &p);
817 get_word(buf1, sizeof(buf1), &p);
818 reply->status_code = atoi(buf1);
820 rtsp_parse_line(reply, p);
821 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
822 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
827 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
828 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
830 content_length = reply->content_length;
831 if (content_length > 0) {
832 /* leave some room for a trailing '\0' (useful for simple parsing) */
833 content = av_malloc(content_length + 1);
834 (void)url_readbuf(rt->rtsp_hd, content, content_length);
835 content[content_length] = '\0';
838 *content_ptr = content;
845 static void rtsp_send_cmd_async (AVFormatContext *s,
846 const char *cmd, RTSPMessageHeader *reply,
847 unsigned char **content_ptr)
849 RTSPState *rt = s->priv_data;
850 char buf[4096], buf1[1024];
853 av_strlcpy(buf, cmd, sizeof(buf));
854 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
855 av_strlcat(buf, buf1, sizeof(buf));
856 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
857 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
858 av_strlcat(buf, buf1, sizeof(buf));
860 av_strlcat(buf, "\r\n", sizeof(buf));
862 printf("Sending:\n%s--\n", buf);
864 url_write(rt->rtsp_hd, buf, strlen(buf));
865 rt->last_cmd_time = av_gettime();
868 static void rtsp_send_cmd (AVFormatContext *s,
869 const char *cmd, RTSPMessageHeader *reply,
870 unsigned char **content_ptr)
872 rtsp_send_cmd_async(s, cmd, reply, content_ptr);
874 rtsp_read_reply(s, reply, content_ptr, 0);
878 /* close and free RTSP streams */
879 static void rtsp_close_streams(RTSPState *rt)
884 for(i=0;i<rt->nb_rtsp_streams;i++) {
885 rtsp_st = rt->rtsp_streams[i];
887 if (rtsp_st->transport_priv) {
888 if (rt->transport == RTSP_TRANSPORT_RDT)
889 ff_rdt_parse_close(rtsp_st->transport_priv);
891 rtp_parse_close(rtsp_st->transport_priv);
893 if (rtsp_st->rtp_handle)
894 url_close(rtsp_st->rtp_handle);
895 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
896 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
899 av_free(rt->rtsp_streams);
901 av_close_input_stream (rt->asf_ctx);
907 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
909 RTSPState *rt = s->priv_data;
912 /* open the RTP context */
913 if (rtsp_st->stream_index >= 0)
914 st = s->streams[rtsp_st->stream_index];
916 s->ctx_flags |= AVFMTCTX_NOHEADER;
918 if (rt->transport == RTSP_TRANSPORT_RDT)
919 rtsp_st->transport_priv = ff_rdt_parse_open(s, st->index,
920 rtsp_st->dynamic_protocol_context,
921 rtsp_st->dynamic_handler);
923 rtsp_st->transport_priv = rtp_parse_open(s, st, rtsp_st->rtp_handle,
924 rtsp_st->sdp_payload_type,
925 &rtsp_st->rtp_payload_data);
927 if (!rtsp_st->transport_priv) {
928 return AVERROR(ENOMEM);
929 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
930 if(rtsp_st->dynamic_handler) {
931 rtp_parse_set_dynamic_protocol(rtsp_st->transport_priv,
932 rtsp_st->dynamic_protocol_context,
933 rtsp_st->dynamic_handler);
941 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
944 make_setup_request (AVFormatContext *s, const char *host, int port,
945 int lower_transport, const char *real_challenge)
947 RTSPState *rt = s->priv_data;
948 int rtx, j, i, err, interleave = 0;
950 RTSPMessageHeader reply1, *reply = &reply1;
952 const char *trans_pref;
954 if (rt->transport == RTSP_TRANSPORT_RDT)
955 trans_pref = "x-pn-tng";
957 trans_pref = "RTP/AVP";
959 /* default timeout: 1 minute */
962 /* for each stream, make the setup request */
963 /* XXX: we assume the same server is used for the control of each
966 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
967 char transport[2048];
970 * WMS serves all UDP data over a single connection, the RTX, which
971 * isn't necessarily the first in the SDP but has to be the first
972 * to be set up, else the second/third SETUP will fail with a 461.
974 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
975 rt->server_type == RTSP_SERVER_WMS) {
978 for (rtx = 0; rtx < rt->nb_rtsp_streams; rtx++) {
979 int len = strlen(rt->rtsp_streams[rtx]->control_url);
981 !strcmp(rt->rtsp_streams[rtx]->control_url + len - 4, "/rtx"))
984 if (rtx == rt->nb_rtsp_streams)
985 return -1; /* no RTX found */
986 rtsp_st = rt->rtsp_streams[rtx];
988 rtsp_st = rt->rtsp_streams[i > rtx ? i : i - 1];
990 rtsp_st = rt->rtsp_streams[i];
993 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
996 if (rt->server_type == RTSP_SERVER_WMS && i > 1) {
997 port = reply->transports[0].client_port_min;
1001 /* first try in specified port range */
1002 if (RTSP_RTP_PORT_MIN != 0) {
1003 while(j <= RTSP_RTP_PORT_MAX) {
1004 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
1005 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
1006 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
1012 /* then try on any port
1013 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
1014 ** err = AVERROR_INVALIDDATA;
1020 port = rtp_get_local_port(rtsp_st->rtp_handle);
1022 snprintf(transport, sizeof(transport) - 1,
1023 "%s/UDP;", trans_pref);
1024 if (rt->server_type != RTSP_SERVER_REAL)
1025 av_strlcat(transport, "unicast;", sizeof(transport));
1026 av_strlcatf(transport, sizeof(transport),
1027 "client_port=%d", port);
1028 if (rt->transport == RTSP_TRANSPORT_RTP &&
1029 !(rt->server_type == RTSP_SERVER_WMS && i > 0))
1030 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
1034 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1035 /** For WMS streams, the application streams are only used for
1036 * UDP. When trying to set it up for TCP streams, the server
1037 * will return an error. Therefore, we skip those streams. */
1038 if (rt->server_type == RTSP_SERVER_WMS &&
1039 s->streams[rtsp_st->stream_index]->codec->codec_type == CODEC_TYPE_DATA)
1041 snprintf(transport, sizeof(transport) - 1,
1042 "%s/TCP;", trans_pref);
1043 if (rt->server_type == RTSP_SERVER_WMS)
1044 av_strlcat(transport, "unicast;", sizeof(transport));
1045 av_strlcatf(transport, sizeof(transport),
1046 "interleaved=%d-%d",
1047 interleave, interleave + 1);
1051 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
1052 snprintf(transport, sizeof(transport) - 1,
1053 "%s/UDP;multicast", trans_pref);
1055 if (rt->server_type == RTSP_SERVER_REAL ||
1056 rt->server_type == RTSP_SERVER_WMS)
1057 av_strlcat(transport, ";mode=play", sizeof(transport));
1058 snprintf(cmd, sizeof(cmd),
1059 "SETUP %s RTSP/1.0\r\n"
1060 "Transport: %s\r\n",
1061 rtsp_st->control_url, transport);
1062 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
1063 char real_res[41], real_csum[9];
1064 ff_rdt_calc_response_and_checksum(real_res, real_csum,
1066 av_strlcatf(cmd, sizeof(cmd),
1068 "RealChallenge2: %s, sd=%s\r\n",
1069 rt->session_id, real_res, real_csum);
1071 rtsp_send_cmd(s, cmd, reply, NULL);
1072 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
1075 } else if (reply->status_code != RTSP_STATUS_OK ||
1076 reply->nb_transports != 1) {
1077 err = AVERROR_INVALIDDATA;
1081 /* XXX: same protocol for all streams is required */
1083 if (reply->transports[0].lower_transport != rt->lower_transport ||
1084 reply->transports[0].transport != rt->transport) {
1085 err = AVERROR_INVALIDDATA;
1089 rt->lower_transport = reply->transports[0].lower_transport;
1090 rt->transport = reply->transports[0].transport;
1093 /* close RTP connection if not choosen */
1094 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
1095 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
1096 url_close(rtsp_st->rtp_handle);
1097 rtsp_st->rtp_handle = NULL;
1100 switch(reply->transports[0].lower_transport) {
1101 case RTSP_LOWER_TRANSPORT_TCP:
1102 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1103 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1106 case RTSP_LOWER_TRANSPORT_UDP:
1110 /* XXX: also use address if specified */
1111 snprintf(url, sizeof(url), "rtp://%s:%d",
1112 host, reply->transports[0].server_port_min);
1113 if (!(rt->server_type == RTSP_SERVER_WMS && i > 1) &&
1114 rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1115 err = AVERROR_INVALIDDATA;
1120 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1125 in.s_addr = htonl(reply->transports[0].destination);
1126 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1128 reply->transports[0].port_min,
1129 reply->transports[0].ttl);
1130 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1131 err = AVERROR_INVALIDDATA;
1138 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1142 if (reply->timeout > 0)
1143 rt->timeout = reply->timeout;
1145 if (rt->server_type == RTSP_SERVER_REAL)
1146 rt->need_subscription = 1;
1151 for (i=0; i<rt->nb_rtsp_streams; i++) {
1152 if (rt->rtsp_streams[i]->rtp_handle) {
1153 url_close(rt->rtsp_streams[i]->rtp_handle);
1154 rt->rtsp_streams[i]->rtp_handle = NULL;
1160 static int rtsp_read_header(AVFormatContext *s,
1161 AVFormatParameters *ap)
1163 RTSPState *rt = s->priv_data;
1164 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1165 URLContext *rtsp_hd;
1167 RTSPMessageHeader reply1, *reply = &reply1;
1168 unsigned char *content = NULL;
1169 int lower_transport_mask = 0;
1170 char real_challenge[64];
1172 /* extract hostname and port */
1173 url_split(NULL, 0, NULL, 0,
1174 host, sizeof(host), &port, path, sizeof(path), s->filename);
1176 port = RTSP_DEFAULT_PORT;
1178 /* search for options */
1179 option_list = strchr(path, '?');
1181 /* remove the options from the path */
1183 while(option_list) {
1184 /* move the option pointer */
1185 option = option_list;
1186 option_list = strchr(option_list, '&');
1188 *(option_list++) = 0;
1189 /* handle the options */
1190 if (strcmp(option, "udp") == 0)
1191 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1192 else if (strcmp(option, "multicast") == 0)
1193 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1194 else if (strcmp(option, "tcp") == 0)
1195 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1199 if (!lower_transport_mask)
1200 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_NB) - 1;
1202 /* open the tcp connexion */
1203 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1204 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1205 return AVERROR(EIO);
1206 rt->rtsp_hd = rtsp_hd;
1209 /* request options supported by the server; this also detects server type */
1210 for (rt->server_type = RTSP_SERVER_RTP;;) {
1211 snprintf(cmd, sizeof(cmd),
1212 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1213 if (rt->server_type == RTSP_SERVER_REAL)
1216 * The following entries are required for proper
1217 * streaming from a Realmedia server. They are
1218 * interdependent in some way although we currently
1219 * don't quite understand how. Values were copied
1220 * from mplayer SVN r23589.
1221 * @param CompanyID is a 16-byte ID in base64
1222 * @param ClientChallenge is a 16-byte ID in hex
1224 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1225 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1226 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1227 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1229 rtsp_send_cmd(s, cmd, reply, NULL);
1230 if (reply->status_code != RTSP_STATUS_OK) {
1231 err = AVERROR_INVALIDDATA;
1235 /* detect server type if not standard-compliant RTP */
1236 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1237 rt->server_type = RTSP_SERVER_REAL;
1239 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1240 rt->server_type = RTSP_SERVER_WMS;
1241 } else if (rt->server_type == RTSP_SERVER_REAL) {
1242 strcpy(real_challenge, reply->real_challenge);
1247 /* describe the stream */
1248 snprintf(cmd, sizeof(cmd),
1249 "DESCRIBE %s RTSP/1.0\r\n"
1250 "Accept: application/sdp\r\n",
1252 if (rt->server_type == RTSP_SERVER_REAL) {
1254 * The Require: attribute is needed for proper streaming from
1255 * Realmedia servers.
1258 "Require: com.real.retain-entity-for-setup\r\n",
1261 rtsp_send_cmd(s, cmd, reply, &content);
1263 err = AVERROR_INVALIDDATA;
1266 if (reply->status_code != RTSP_STATUS_OK) {
1267 err = AVERROR_INVALIDDATA;
1271 /* now we got the SDP description, we parse it */
1272 ret = sdp_parse(s, (const char *)content);
1275 err = AVERROR_INVALIDDATA;
1280 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1282 err = make_setup_request(s, host, port, lower_transport,
1283 rt->server_type == RTSP_SERVER_REAL ?
1284 real_challenge : NULL);
1287 lower_transport_mask &= ~(1 << lower_transport);
1288 if (lower_transport_mask == 0 && err == 1) {
1289 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1294 rt->state = RTSP_STATE_IDLE;
1295 rt->seek_timestamp = 0; /* default is to start stream at position
1297 if (ap->initial_pause) {
1298 /* do not start immediately */
1300 if (rtsp_read_play(s) < 0) {
1301 err = AVERROR_INVALIDDATA;
1307 rtsp_close_streams(rt);
1309 url_close(rt->rtsp_hd);
1313 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1314 uint8_t *buf, int buf_size)
1316 RTSPState *rt = s->priv_data;
1317 int id, len, i, ret;
1318 RTSPStream *rtsp_st;
1320 #ifdef DEBUG_RTP_TCP
1321 printf("tcp_read_packet:\n");
1325 RTSPMessageHeader reply;
1327 ret = rtsp_read_reply(s, &reply, NULL, 1);
1330 if (ret == 1) /* received '$' */
1332 /* XXX: parse message */
1334 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1338 len = AV_RB16(buf + 1);
1339 #ifdef DEBUG_RTP_TCP
1340 printf("id=%d len=%d\n", id, len);
1342 if (len > buf_size || len < 12)
1345 ret = url_readbuf(rt->rtsp_hd, buf, len);
1348 if (rt->transport == RTSP_TRANSPORT_RDT &&
1349 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1352 /* find the matching stream */
1353 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1354 rtsp_st = rt->rtsp_streams[i];
1355 if (id >= rtsp_st->interleaved_min &&
1356 id <= rtsp_st->interleaved_max)
1361 *prtsp_st = rtsp_st;
1365 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1366 uint8_t *buf, int buf_size)
1368 RTSPState *rt = s->priv_data;
1369 RTSPStream *rtsp_st;
1371 int fd, fd_max, n, i, ret, tcp_fd;
1375 if (url_interrupt_cb())
1376 return AVERROR(EINTR);
1379 tcp_fd = fd_max = url_get_file_handle(rt->rtsp_hd);
1380 FD_SET(tcp_fd, &rfds);
1385 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1386 rtsp_st = rt->rtsp_streams[i];
1387 if (rtsp_st->rtp_handle) {
1388 /* currently, we cannot probe RTCP handle because of
1389 * blocking restrictions */
1390 fd = url_get_file_handle(rtsp_st->rtp_handle);
1397 tv.tv_usec = 100 * 1000;
1398 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1400 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1401 rtsp_st = rt->rtsp_streams[i];
1402 if (rtsp_st->rtp_handle) {
1403 fd = url_get_file_handle(rtsp_st->rtp_handle);
1404 if (FD_ISSET(fd, &rfds)) {
1405 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1407 *prtsp_st = rtsp_st;
1413 if (FD_ISSET(tcp_fd, &rfds)) {
1414 RTSPMessageHeader reply;
1416 rtsp_read_reply(s, &reply, NULL, 0);
1417 /* XXX: parse message */
1423 static int rtsp_read_packet(AVFormatContext *s,
1426 RTSPState *rt = s->priv_data;
1427 RTSPStream *rtsp_st;
1429 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1430 RTSPMessageHeader reply1, *reply = &reply1;
1433 if (rt->server_type == RTSP_SERVER_REAL) {
1435 enum AVDiscard cache[MAX_STREAMS];
1437 for (i = 0; i < s->nb_streams; i++)
1438 cache[i] = s->streams[i]->discard;
1440 if (!rt->need_subscription) {
1441 if (memcmp (cache, rt->real_setup_cache,
1442 sizeof(enum AVDiscard) * s->nb_streams)) {
1443 av_strlcatf(cmd, sizeof(cmd),
1444 "SET_PARAMETER %s RTSP/1.0\r\n"
1445 "Unsubscribe: %s\r\n",
1446 s->filename, rt->last_subscription);
1447 rtsp_send_cmd(s, cmd, reply, NULL);
1448 if (reply->status_code != RTSP_STATUS_OK)
1449 return AVERROR_INVALIDDATA;
1450 rt->need_subscription = 1;
1454 if (rt->need_subscription) {
1455 int r, rule_nr, first = 1;
1457 memcpy(rt->real_setup_cache, cache,
1458 sizeof(enum AVDiscard) * s->nb_streams);
1459 rt->last_subscription[0] = 0;
1461 snprintf(cmd, sizeof(cmd),
1462 "SET_PARAMETER %s RTSP/1.0\r\n"
1465 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1467 for (r = 0; r < s->nb_streams; r++) {
1468 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1469 if (s->streams[r]->discard != AVDISCARD_ALL) {
1471 av_strlcat(rt->last_subscription, ",",
1472 sizeof(rt->last_subscription));
1473 ff_rdt_subscribe_rule(
1474 rt->last_subscription,
1475 sizeof(rt->last_subscription), i, rule_nr);
1482 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1483 rtsp_send_cmd(s, cmd, reply, NULL);
1484 if (reply->status_code != RTSP_STATUS_OK)
1485 return AVERROR_INVALIDDATA;
1486 rt->need_subscription = 0;
1488 if (rt->state == RTSP_STATE_PLAYING)
1493 /* get next frames from the same RTP packet */
1494 if (rt->cur_transport_priv) {
1495 if (rt->transport == RTSP_TRANSPORT_RDT)
1496 ret = ff_rdt_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1498 ret = rtp_parse_packet(rt->cur_transport_priv, pkt, NULL, 0);
1500 rt->cur_transport_priv = NULL;
1502 } else if (ret == 1) {
1505 rt->cur_transport_priv = NULL;
1509 /* read next RTP packet */
1511 switch(rt->lower_transport) {
1513 case RTSP_LOWER_TRANSPORT_TCP:
1514 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1516 case RTSP_LOWER_TRANSPORT_UDP:
1517 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1518 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1519 if (len >=0 && rtsp_st->transport_priv && rt->transport == RTSP_TRANSPORT_RTP)
1520 rtp_check_and_send_back_rr(rtsp_st->transport_priv, len);
1525 if (rt->transport == RTSP_TRANSPORT_RDT)
1526 ret = ff_rdt_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1528 ret = rtp_parse_packet(rtsp_st->transport_priv, pkt, buf, len);
1532 /* more packets may follow, so we save the RTP context */
1533 rt->cur_transport_priv = rtsp_st->transport_priv;
1536 /* send dummy request to keep TCP connection alive */
1537 if ((rt->server_type == RTSP_SERVER_WMS ||
1538 rt->server_type == RTSP_SERVER_REAL) &&
1539 (av_gettime() - rt->last_cmd_time) / 1000000 >= rt->timeout / 2) {
1540 if (rt->server_type == RTSP_SERVER_WMS) {
1541 snprintf(cmd, sizeof(cmd) - 1,
1542 "GET_PARAMETER %s RTSP/1.0\r\n",
1544 rtsp_send_cmd_async(s, cmd, reply, NULL);
1546 rtsp_send_cmd_async(s, "OPTIONS * RTSP/1.0\r\n",
1554 static int rtsp_read_play(AVFormatContext *s)
1556 RTSPState *rt = s->priv_data;
1557 RTSPMessageHeader reply1, *reply = &reply1;
1560 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1562 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1563 if (rt->state == RTSP_STATE_PAUSED) {
1564 snprintf(cmd, sizeof(cmd),
1565 "PLAY %s RTSP/1.0\r\n",
1568 snprintf(cmd, sizeof(cmd),
1569 "PLAY %s RTSP/1.0\r\n"
1570 "Range: npt=%0.3f-\r\n",
1572 (double)rt->seek_timestamp / AV_TIME_BASE);
1574 rtsp_send_cmd(s, cmd, reply, NULL);
1575 if (reply->status_code != RTSP_STATUS_OK) {
1579 rt->state = RTSP_STATE_PLAYING;
1583 /* pause the stream */
1584 static int rtsp_read_pause(AVFormatContext *s)
1586 RTSPState *rt = s->priv_data;
1587 RTSPMessageHeader reply1, *reply = &reply1;
1592 if (rt->state != RTSP_STATE_PLAYING)
1594 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1595 snprintf(cmd, sizeof(cmd),
1596 "PAUSE %s RTSP/1.0\r\n",
1598 rtsp_send_cmd(s, cmd, reply, NULL);
1599 if (reply->status_code != RTSP_STATUS_OK) {
1603 rt->state = RTSP_STATE_PAUSED;
1607 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1608 int64_t timestamp, int flags)
1610 RTSPState *rt = s->priv_data;
1612 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1615 case RTSP_STATE_IDLE:
1617 case RTSP_STATE_PLAYING:
1618 if (rtsp_read_play(s) != 0)
1621 case RTSP_STATE_PAUSED:
1622 rt->state = RTSP_STATE_IDLE;
1628 static int rtsp_read_close(AVFormatContext *s)
1630 RTSPState *rt = s->priv_data;
1631 RTSPMessageHeader reply1, *reply = &reply1;
1635 /* NOTE: it is valid to flush the buffer here */
1636 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1637 url_fclose(&rt->rtsp_gb);
1640 snprintf(cmd, sizeof(cmd),
1641 "TEARDOWN %s RTSP/1.0\r\n",
1643 rtsp_send_cmd(s, cmd, reply, NULL);
1645 rtsp_close_streams(rt);
1646 url_close(rt->rtsp_hd);
1650 #if CONFIG_RTSP_DEMUXER
1651 AVInputFormat rtsp_demuxer = {
1653 NULL_IF_CONFIG_SMALL("RTSP input format"),
1660 .flags = AVFMT_NOFILE,
1661 .read_play = rtsp_read_play,
1662 .read_pause = rtsp_read_pause,
1666 static int sdp_probe(AVProbeData *p1)
1668 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1670 /* we look for a line beginning "c=IN IP4" */
1671 while (p < p_end && *p != '\0') {
1672 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1673 return AVPROBE_SCORE_MAX / 2;
1675 while(p < p_end - 1 && *p != '\n') p++;
1684 #define SDP_MAX_SIZE 8192
1686 static int sdp_read_header(AVFormatContext *s,
1687 AVFormatParameters *ap)
1689 RTSPState *rt = s->priv_data;
1690 RTSPStream *rtsp_st;
1695 /* read the whole sdp file */
1696 /* XXX: better loading */
1697 content = av_malloc(SDP_MAX_SIZE);
1698 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1701 return AVERROR_INVALIDDATA;
1703 content[size] ='\0';
1705 sdp_parse(s, content);
1708 /* open each RTP stream */
1709 for(i=0;i<rt->nb_rtsp_streams;i++) {
1710 rtsp_st = rt->rtsp_streams[i];
1712 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1713 inet_ntoa(rtsp_st->sdp_ip),
1717 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1718 err = AVERROR_INVALIDDATA;
1721 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1726 rtsp_close_streams(rt);
1730 static int sdp_read_packet(AVFormatContext *s,
1733 return rtsp_read_packet(s, pkt);
1736 static int sdp_read_close(AVFormatContext *s)
1738 RTSPState *rt = s->priv_data;
1739 rtsp_close_streams(rt);
1743 #if CONFIG_SDP_DEMUXER
1744 AVInputFormat sdp_demuxer = {
1746 NULL_IF_CONFIG_SMALL("SDP"),
1755 #if CONFIG_REDIR_DEMUXER
1756 /* dummy redirector format (used directly in av_open_input_file now) */
1757 static int redir_probe(AVProbeData *pd)
1762 if (av_strstart(p, "http://", NULL) ||
1763 av_strstart(p, "rtsp://", NULL))
1764 return AVPROBE_SCORE_MAX;
1768 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1772 AVFormatContext *ic = NULL;
1773 ByteIOContext *f = s->pb;
1775 /* parse each URL and try to open it */
1777 while (c != URL_EOF) {
1780 if (!redir_isspace(c))
1789 if (c == URL_EOF || redir_isspace(c))
1791 if ((q - buf) < sizeof(buf) - 1)
1796 //printf("URL='%s'\n", buf);
1797 /* try to open the media file */
1798 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1802 return AVERROR(EIO);
1810 AVInputFormat redir_demuxer = {
1812 NULL_IF_CONFIG_SMALL("Redirector format"),