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>
37 #include "rtp_internal.h"
41 //#define DEBUG_RTP_TCP
43 static int rtsp_read_play(AVFormatContext *s);
45 /* XXX: currently, the only way to change the protocols consists in
46 changing this variable */
48 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
49 int rtsp_default_protocols = (1 << RTSP_LOWER_TRANSPORT_UDP);
52 static int rtsp_probe(AVProbeData *p)
54 if (av_strstart(p->filename, "rtsp:", NULL))
55 return AVPROBE_SCORE_MAX;
59 static int redir_isspace(int c)
61 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
64 static void skip_spaces(const char **pp)
68 while (redir_isspace(*p))
73 static void get_word_sep(char *buf, int buf_size, const char *sep,
84 while (!strchr(sep, *p) && *p != '\0') {
85 if ((q - buf) < buf_size - 1)
94 static void get_word(char *buf, int buf_size, const char **pp)
102 while (!redir_isspace(*p) && *p != '\0') {
103 if ((q - buf) < buf_size - 1)
112 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
114 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
121 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
122 see if we can handle this kind of payload */
123 get_word_sep(buf, sizeof(buf), "/", &p);
124 if (payload_type >= RTP_PT_PRIVATE) {
125 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
127 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
128 codec->codec_id = handler->codec_id;
129 rtsp_st->dynamic_handler= handler;
131 rtsp_st->dynamic_protocol_context= handler->open();
135 handler= handler->next;
138 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
139 /* search into AVRtpPayloadTypes[] */
140 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
143 c = avcodec_find_decoder(codec->codec_id);
147 c_name = (char *)NULL;
150 get_word_sep(buf, sizeof(buf), "/", &p);
152 switch (codec->codec_type) {
153 case CODEC_TYPE_AUDIO:
154 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
155 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
156 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
158 codec->sample_rate = i;
159 get_word_sep(buf, sizeof(buf), "/", &p);
163 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
164 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
166 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
167 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
169 case CODEC_TYPE_VIDEO:
170 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
181 /* return the length and optionnaly the data */
182 static int hex_to_data(uint8_t *data, const char *p)
192 c = toupper((unsigned char)*p++);
193 if (c >= '0' && c <= '9')
195 else if (c >= 'A' && c <= 'F')
210 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
212 switch (codec->codec_id) {
215 if (!strcmp(attr, "config")) {
216 /* decode the hexa encoded parameter */
217 int len = hex_to_data(NULL, value);
218 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
219 if (!codec->extradata)
221 codec->extradata_size = len;
222 hex_to_data(codec->extradata, value);
237 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
238 #define ATTR_NAME_TYPE_INT 0
239 #define ATTR_NAME_TYPE_STR 1
240 static const AttrNameMap attr_names[]=
242 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
243 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
244 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
245 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
246 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
247 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
251 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
252 * because it is used in rtp_h264.c, which is forthcoming.
254 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, 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)
277 RTSPStream *rtsp_st = st->priv_data;
278 AVCodecContext *codec = st->codec;
279 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
281 /* loop on each attribute */
282 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
284 /* grab the codec extra_data from the config parameter of the fmtp line */
285 sdp_parse_fmtp_config(codec, attr, value);
286 /* Looking for a known attribute */
287 for (i = 0; attr_names[i].str; ++i) {
288 if (!strcasecmp(attr, attr_names[i].str)) {
289 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
290 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
291 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
292 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
298 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
300 * Used for seeking in the rtp stream.
302 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
307 if (!av_stristart(p, "npt=", &p))
310 *start = AV_NOPTS_VALUE;
311 *end = AV_NOPTS_VALUE;
313 get_word_sep(buf, sizeof(buf), "-", &p);
314 *start = parse_date(buf, 1);
317 get_word_sep(buf, sizeof(buf), "-", &p);
318 *end = parse_date(buf, 1);
320 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
321 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
324 typedef struct SDPParseState {
326 struct in_addr default_ip;
330 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
331 int letter, const char *buf)
333 RTSPState *rt = s->priv_data;
334 char buf1[64], st_type[64];
336 enum CodecType codec_type;
340 struct in_addr sdp_ip;
344 printf("sdp: %c='%s'\n", letter, buf);
350 get_word(buf1, sizeof(buf1), &p);
351 if (strcmp(buf1, "IN") != 0)
353 get_word(buf1, sizeof(buf1), &p);
354 if (strcmp(buf1, "IP4") != 0)
356 get_word_sep(buf1, sizeof(buf1), "/", &p);
357 if (inet_aton(buf1, &sdp_ip) == 0)
362 get_word_sep(buf1, sizeof(buf1), "/", &p);
365 if (s->nb_streams == 0) {
366 s1->default_ip = sdp_ip;
367 s1->default_ttl = ttl;
369 st = s->streams[s->nb_streams - 1];
370 rtsp_st = st->priv_data;
371 rtsp_st->sdp_ip = sdp_ip;
372 rtsp_st->sdp_ttl = ttl;
376 av_strlcpy(s->title, p, sizeof(s->title));
379 if (s->nb_streams == 0) {
380 av_strlcpy(s->comment, p, sizeof(s->comment));
386 get_word(st_type, sizeof(st_type), &p);
387 if (!strcmp(st_type, "audio")) {
388 codec_type = CODEC_TYPE_AUDIO;
389 } else if (!strcmp(st_type, "video")) {
390 codec_type = CODEC_TYPE_VIDEO;
394 rtsp_st = av_mallocz(sizeof(RTSPStream));
397 rtsp_st->stream_index = -1;
398 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
400 rtsp_st->sdp_ip = s1->default_ip;
401 rtsp_st->sdp_ttl = s1->default_ttl;
403 get_word(buf1, sizeof(buf1), &p); /* port */
404 rtsp_st->sdp_port = atoi(buf1);
406 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
408 /* XXX: handle list of formats */
409 get_word(buf1, sizeof(buf1), &p); /* format list */
410 rtsp_st->sdp_payload_type = atoi(buf1);
412 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
413 /* no corresponding stream */
415 st = av_new_stream(s, 0);
418 st->priv_data = rtsp_st;
419 rtsp_st->stream_index = st->index;
420 st->codec->codec_type = codec_type;
421 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
422 /* if standard payload type, we can find the codec right now */
423 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
426 /* put a default control url */
427 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
430 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
432 /* get the control url */
433 st = s->streams[s->nb_streams - 1];
434 rtsp_st = st->priv_data;
436 /* XXX: may need to add full url resolution */
437 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
438 if (proto[0] == '\0') {
439 /* relative control URL */
440 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
441 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
443 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
445 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
446 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
447 get_word(buf1, sizeof(buf1), &p);
448 payload_type = atoi(buf1);
449 st = s->streams[s->nb_streams - 1];
450 rtsp_st = st->priv_data;
451 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
452 } else if (av_strstart(p, "fmtp:", &p)) {
453 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
454 get_word(buf1, sizeof(buf1), &p);
455 payload_type = atoi(buf1);
456 for(i = 0; i < s->nb_streams;i++) {
458 rtsp_st = st->priv_data;
459 if (rtsp_st->sdp_payload_type == payload_type) {
460 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
461 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
462 sdp_parse_fmtp(st, p);
465 sdp_parse_fmtp(st, p);
469 } else if(av_strstart(p, "framesize:", &p)) {
470 // let dynamic protocol handlers have a stab at the line.
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 && rtsp_st->dynamic_handler->parse_sdp_a_line) {
478 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
482 } else if(av_strstart(p, "range:", &p)) {
485 // this is so that seeking on a streamed file can work.
486 rtsp_parse_range_npt(p, &start, &end);
487 s->start_time= start;
488 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
489 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
491 rt->transport = RTSP_TRANSPORT_RDT;
492 } else if (s->nb_streams > 0) {
493 if (rt->server_type == RTSP_SERVER_REAL)
494 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
496 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
497 if (rtsp_st->dynamic_handler &&
498 rtsp_st->dynamic_handler->parse_sdp_a_line)
499 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
500 rtsp_st->dynamic_protocol_context, buf);
506 static int sdp_parse(AVFormatContext *s, const char *content)
510 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
511 * contain long SDP lines containing complete ASF Headers (several
512 * kB) or arrays of MDPR (RM stream descriptor) headers plus
513 * "rulebooks" describing their properties. Therefore, the SDP line
514 * buffer is large. */
516 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
518 memset(s1, 0, sizeof(SDPParseState));
529 /* get the content */
531 while (*p != '\n' && *p != '\r' && *p != '\0') {
532 if ((q - buf) < sizeof(buf) - 1)
537 sdp_parse_line(s, s1, letter, buf);
539 while (*p != '\n' && *p != '\0')
547 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
554 v = strtol(p, (char **)&p, 10);
558 v = strtol(p, (char **)&p, 10);
567 /* XXX: only one transport specification is parsed */
568 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
570 char transport_protocol[16];
572 char lower_transport[16];
574 RTSPTransportField *th;
577 reply->nb_transports = 0;
584 th = &reply->transports[reply->nb_transports];
586 get_word_sep(transport_protocol, sizeof(transport_protocol),
590 if (!strcasecmp (transport_protocol, "rtp")) {
591 get_word_sep(profile, sizeof(profile), "/;,", &p);
592 lower_transport[0] = '\0';
593 /* rtp/avp/<protocol> */
596 get_word_sep(lower_transport, sizeof(lower_transport),
599 th->transport = RTSP_TRANSPORT_RTP;
600 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
601 !strcasecmp (transport_protocol, "x-real-rdt")) {
602 /* x-pn-tng/<protocol> */
603 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
605 th->transport = RTSP_TRANSPORT_RDT;
607 if (!strcasecmp(lower_transport, "TCP"))
608 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
610 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
614 /* get each parameter */
615 while (*p != '\0' && *p != ',') {
616 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
617 if (!strcmp(parameter, "port")) {
620 rtsp_parse_range(&th->port_min, &th->port_max, &p);
622 } else if (!strcmp(parameter, "client_port")) {
625 rtsp_parse_range(&th->client_port_min,
626 &th->client_port_max, &p);
628 } else if (!strcmp(parameter, "server_port")) {
631 rtsp_parse_range(&th->server_port_min,
632 &th->server_port_max, &p);
634 } else if (!strcmp(parameter, "interleaved")) {
637 rtsp_parse_range(&th->interleaved_min,
638 &th->interleaved_max, &p);
640 } else if (!strcmp(parameter, "multicast")) {
641 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
642 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
643 } else if (!strcmp(parameter, "ttl")) {
646 th->ttl = strtol(p, (char **)&p, 10);
648 } else if (!strcmp(parameter, "destination")) {
649 struct in_addr ipaddr;
653 get_word_sep(buf, sizeof(buf), ";,", &p);
654 if (inet_aton(buf, &ipaddr))
655 th->destination = ntohl(ipaddr.s_addr);
658 while (*p != ';' && *p != '\0' && *p != ',')
666 reply->nb_transports++;
670 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
674 /* NOTE: we do case independent match for broken servers */
676 if (av_stristart(p, "Session:", &p)) {
677 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
678 } else if (av_stristart(p, "Content-Length:", &p)) {
679 reply->content_length = strtol(p, NULL, 10);
680 } else if (av_stristart(p, "Transport:", &p)) {
681 rtsp_parse_transport(reply, p);
682 } else if (av_stristart(p, "CSeq:", &p)) {
683 reply->seq = strtol(p, NULL, 10);
684 } else if (av_stristart(p, "Range:", &p)) {
685 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
686 } else if (av_stristart(p, "RealChallenge1:", &p)) {
688 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
689 } else if (av_stristart(p, "Server:", &p)) {
691 av_strlcpy(reply->server, p, sizeof(reply->server));
695 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
701 ret = url_read(h, buf+len, size-len);
709 /* skip a RTP/TCP interleaved packet */
710 static void rtsp_skip_packet(AVFormatContext *s)
712 RTSPState *rt = s->priv_data;
716 ret = url_readbuf(rt->rtsp_hd, buf, 3);
719 len = AV_RB16(buf + 1);
721 printf("skipping RTP packet len=%d\n", len);
726 if (len1 > sizeof(buf))
728 ret = url_readbuf(rt->rtsp_hd, buf, len1);
735 static void rtsp_send_cmd(AVFormatContext *s,
736 const char *cmd, RTSPHeader *reply,
737 unsigned char **content_ptr)
739 RTSPState *rt = s->priv_data;
740 char buf[4096], buf1[1024], *q;
743 int content_length, line_count;
744 unsigned char *content = NULL;
746 memset(reply, 0, sizeof(RTSPHeader));
749 av_strlcpy(buf, cmd, sizeof(buf));
750 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
751 av_strlcat(buf, buf1, sizeof(buf));
752 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
753 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
754 av_strlcat(buf, buf1, sizeof(buf));
756 av_strlcat(buf, "\r\n", sizeof(buf));
758 printf("Sending:\n%s--\n", buf);
760 url_write(rt->rtsp_hd, buf, strlen(buf));
762 /* parse reply (XXX: use buffers) */
764 rt->last_reply[0] = '\0';
768 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
773 /* XXX: only parse it if first char on line ? */
775 } else if (ch != '\r') {
776 if ((q - buf) < sizeof(buf) - 1)
782 printf("line='%s'\n", buf);
784 /* test if last line */
788 if (line_count == 0) {
790 get_word(buf1, sizeof(buf1), &p);
791 get_word(buf1, sizeof(buf1), &p);
792 reply->status_code = atoi(buf1);
794 rtsp_parse_line(reply, p);
795 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
796 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
801 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
802 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
804 content_length = reply->content_length;
805 if (content_length > 0) {
806 /* leave some room for a trailing '\0' (useful for simple parsing) */
807 content = av_malloc(content_length + 1);
808 (void)url_readbuf(rt->rtsp_hd, content, content_length);
809 content[content_length] = '\0';
812 *content_ptr = content;
818 /* close and free RTSP streams */
819 static void rtsp_close_streams(RTSPState *rt)
824 for(i=0;i<rt->nb_rtsp_streams;i++) {
825 rtsp_st = rt->rtsp_streams[i];
827 if (rtsp_st->tx_ctx) {
828 if (rt->transport == RTSP_TRANSPORT_RDT)
829 ff_rdt_parse_close(rtsp_st->tx_ctx);
831 rtp_parse_close(rtsp_st->tx_ctx);
833 if (rtsp_st->rtp_handle)
834 url_close(rtsp_st->rtp_handle);
835 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
836 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
839 av_free(rt->rtsp_streams);
843 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
845 RTSPState *rt = s->priv_data;
848 /* open the RTP context */
849 if (rtsp_st->stream_index >= 0)
850 st = s->streams[rtsp_st->stream_index];
852 s->ctx_flags |= AVFMTCTX_NOHEADER;
854 if (rt->transport == RTSP_TRANSPORT_RDT)
855 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
856 rtsp_st->dynamic_protocol_context,
857 rtsp_st->dynamic_handler);
859 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
860 rtsp_st->sdp_payload_type,
861 &rtsp_st->rtp_payload_data);
863 if (!rtsp_st->tx_ctx) {
864 return AVERROR(ENOMEM);
865 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
866 if(rtsp_st->dynamic_handler) {
867 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
868 rtsp_st->dynamic_protocol_context,
869 rtsp_st->dynamic_handler);
877 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
880 make_setup_request (AVFormatContext *s, const char *host, int port,
881 int lower_transport, const char *real_challenge)
883 RTSPState *rt = s->priv_data;
886 RTSPHeader reply1, *reply = &reply1;
888 const char *trans_pref;
890 if (rt->transport == RTSP_TRANSPORT_RDT)
891 trans_pref = "x-pn-tng";
893 trans_pref = "RTP/AVP";
895 /* for each stream, make the setup request */
896 /* XXX: we assume the same server is used for the control of each
899 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
900 char transport[2048];
902 rtsp_st = rt->rtsp_streams[i];
905 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
908 /* first try in specified port range */
909 if (RTSP_RTP_PORT_MIN != 0) {
910 while(j <= RTSP_RTP_PORT_MAX) {
911 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
912 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
913 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
919 /* then try on any port
920 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
921 ** err = AVERROR_INVALIDDATA;
927 port = rtp_get_local_port(rtsp_st->rtp_handle);
928 snprintf(transport, sizeof(transport) - 1,
929 "%s/UDP;", trans_pref);
930 if (rt->server_type != RTSP_SERVER_REAL)
931 av_strlcat(transport, "unicast;", sizeof(transport));
932 av_strlcatf(transport, sizeof(transport),
933 "client_port=%d", port);
934 if (rt->transport == RTSP_TRANSPORT_RTP)
935 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
939 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
940 snprintf(transport, sizeof(transport) - 1,
941 "%s/TCP", trans_pref);
944 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
945 snprintf(transport, sizeof(transport) - 1,
946 "%s/UDP;multicast", trans_pref);
948 if (rt->server_type == RTSP_SERVER_REAL)
949 av_strlcat(transport, ";mode=play", sizeof(transport));
950 snprintf(cmd, sizeof(cmd),
951 "SETUP %s RTSP/1.0\r\n"
953 rtsp_st->control_url, transport);
954 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
955 char real_res[41], real_csum[9];
956 ff_rdt_calc_response_and_checksum(real_res, real_csum,
958 av_strlcatf(cmd, sizeof(cmd),
960 "RealChallenge2: %s, sd=%s\r\n",
961 rt->session_id, real_res, real_csum);
963 rtsp_send_cmd(s, cmd, reply, NULL);
964 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
967 } else if (reply->status_code != RTSP_STATUS_OK ||
968 reply->nb_transports != 1) {
969 err = AVERROR_INVALIDDATA;
973 /* XXX: same protocol for all streams is required */
975 if (reply->transports[0].lower_transport != rt->lower_transport ||
976 reply->transports[0].transport != rt->transport) {
977 err = AVERROR_INVALIDDATA;
981 rt->lower_transport = reply->transports[0].lower_transport;
982 rt->transport = reply->transports[0].transport;
985 /* close RTP connection if not choosen */
986 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
987 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
988 url_close(rtsp_st->rtp_handle);
989 rtsp_st->rtp_handle = NULL;
992 switch(reply->transports[0].lower_transport) {
993 case RTSP_LOWER_TRANSPORT_TCP:
994 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
995 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
998 case RTSP_LOWER_TRANSPORT_UDP:
1002 /* XXX: also use address if specified */
1003 snprintf(url, sizeof(url), "rtp://%s:%d",
1004 host, reply->transports[0].server_port_min);
1005 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1006 err = AVERROR_INVALIDDATA;
1011 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1016 in.s_addr = htonl(reply->transports[0].destination);
1017 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1019 reply->transports[0].port_min,
1020 reply->transports[0].ttl);
1021 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1022 err = AVERROR_INVALIDDATA;
1029 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1033 if (rt->server_type == RTSP_SERVER_REAL)
1034 rt->need_subscription = 1;
1039 for (i=0; i<rt->nb_rtsp_streams; i++) {
1040 if (rt->rtsp_streams[i]->rtp_handle) {
1041 url_close(rt->rtsp_streams[i]->rtp_handle);
1042 rt->rtsp_streams[i]->rtp_handle = NULL;
1048 static int rtsp_read_header(AVFormatContext *s,
1049 AVFormatParameters *ap)
1051 RTSPState *rt = s->priv_data;
1052 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1053 URLContext *rtsp_hd;
1055 RTSPHeader reply1, *reply = &reply1;
1056 unsigned char *content = NULL;
1057 int lower_transport_mask = 0;
1058 char real_challenge[64];
1060 /* extract hostname and port */
1061 url_split(NULL, 0, NULL, 0,
1062 host, sizeof(host), &port, path, sizeof(path), s->filename);
1064 port = RTSP_DEFAULT_PORT;
1066 /* search for options */
1067 option_list = strchr(path, '?');
1069 /* remove the options from the path */
1071 while(option_list) {
1072 /* move the option pointer */
1073 option = option_list;
1074 option_list = strchr(option_list, '&');
1076 *(option_list++) = 0;
1077 /* handle the options */
1078 if (strcmp(option, "udp") == 0)
1079 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1080 else if (strcmp(option, "multicast") == 0)
1081 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1082 else if (strcmp(option, "tcp") == 0)
1083 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1087 if (!lower_transport_mask)
1088 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
1090 /* open the tcp connexion */
1091 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1092 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1093 return AVERROR(EIO);
1094 rt->rtsp_hd = rtsp_hd;
1097 /* request options supported by the server; this also detects server type */
1098 for (rt->server_type = RTSP_SERVER_RTP;;) {
1099 snprintf(cmd, sizeof(cmd),
1100 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1101 if (rt->server_type == RTSP_SERVER_REAL)
1104 * The following entries are required for proper
1105 * streaming from a Realmedia server. They are
1106 * interdependent in some way although we currently
1107 * don't quite understand how. Values were copied
1108 * from mplayer SVN r23589.
1109 * @param CompanyID is a 16-byte ID in base64
1110 * @param ClientChallenge is a 16-byte ID in hex
1112 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1113 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1114 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1115 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1117 rtsp_send_cmd(s, cmd, reply, NULL);
1118 if (reply->status_code != RTSP_STATUS_OK) {
1119 err = AVERROR_INVALIDDATA;
1123 /* detect server type if not standard-compliant RTP */
1124 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1125 rt->server_type = RTSP_SERVER_REAL;
1127 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1128 rt->server_type = RTSP_SERVER_WMS;
1129 } else if (rt->server_type == RTSP_SERVER_REAL) {
1130 strcpy(real_challenge, reply->real_challenge);
1135 /* describe the stream */
1136 snprintf(cmd, sizeof(cmd),
1137 "DESCRIBE %s RTSP/1.0\r\n"
1138 "Accept: application/sdp\r\n",
1140 if (rt->server_type == RTSP_SERVER_REAL) {
1142 * The Require: attribute is needed for proper streaming from
1143 * Realmedia servers.
1146 "Require: com.real.retain-entity-for-setup\r\n",
1149 rtsp_send_cmd(s, cmd, reply, &content);
1151 err = AVERROR_INVALIDDATA;
1154 if (reply->status_code != RTSP_STATUS_OK) {
1155 err = AVERROR_INVALIDDATA;
1159 /* now we got the SDP description, we parse it */
1160 ret = sdp_parse(s, (const char *)content);
1163 err = AVERROR_INVALIDDATA;
1168 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1170 err = make_setup_request(s, host, port, lower_transport,
1171 rt->server_type == RTSP_SERVER_REAL ?
1172 real_challenge : NULL);
1175 lower_transport_mask &= ~(1 << lower_transport);
1176 if (lower_transport_mask == 0 && err == 1) {
1177 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1182 rt->state = RTSP_STATE_IDLE;
1183 rt->seek_timestamp = 0; /* default is to start stream at position
1185 if (ap->initial_pause) {
1186 /* do not start immediately */
1188 if (rtsp_read_play(s) < 0) {
1189 err = AVERROR_INVALIDDATA;
1195 rtsp_close_streams(rt);
1197 url_close(rt->rtsp_hd);
1201 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1202 uint8_t *buf, int buf_size)
1204 RTSPState *rt = s->priv_data;
1205 int id, len, i, ret;
1206 RTSPStream *rtsp_st;
1208 #ifdef DEBUG_RTP_TCP
1209 printf("tcp_read_packet:\n");
1213 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1214 #ifdef DEBUG_RTP_TCP
1215 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1222 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1226 len = AV_RB16(buf + 1);
1227 #ifdef DEBUG_RTP_TCP
1228 printf("id=%d len=%d\n", id, len);
1230 if (len > buf_size || len < 12)
1233 ret = url_readbuf(rt->rtsp_hd, buf, len);
1236 if (rt->transport == RTSP_TRANSPORT_RDT &&
1237 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1240 /* find the matching stream */
1241 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1242 rtsp_st = rt->rtsp_streams[i];
1243 if (id >= rtsp_st->interleaved_min &&
1244 id <= rtsp_st->interleaved_max)
1249 *prtsp_st = rtsp_st;
1253 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1254 uint8_t *buf, int buf_size)
1256 RTSPState *rt = s->priv_data;
1257 RTSPStream *rtsp_st;
1259 int fd1, fd2, fd_max, n, i, ret;
1263 if (url_interrupt_cb())
1264 return AVERROR(EINTR);
1267 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1268 rtsp_st = rt->rtsp_streams[i];
1269 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1270 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1276 tv.tv_usec = 100 * 1000;
1277 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1279 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1280 rtsp_st = rt->rtsp_streams[i];
1281 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1282 if (FD_ISSET(fd1, &rfds)) {
1283 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1285 *prtsp_st = rtsp_st;
1294 static int rtsp_read_packet(AVFormatContext *s,
1297 RTSPState *rt = s->priv_data;
1298 RTSPStream *rtsp_st;
1300 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1302 if (rt->server_type == RTSP_SERVER_REAL) {
1304 RTSPHeader reply1, *reply = &reply1;
1305 enum AVDiscard cache[MAX_STREAMS];
1308 for (i = 0; i < s->nb_streams; i++)
1309 cache[i] = s->streams[i]->discard;
1311 if (!rt->need_subscription) {
1312 if (memcmp (cache, rt->real_setup_cache,
1313 sizeof(enum AVDiscard) * s->nb_streams)) {
1314 av_strlcatf(cmd, sizeof(cmd),
1315 "SET_PARAMETER %s RTSP/1.0\r\n"
1316 "Unsubscribe: %s\r\n",
1317 s->filename, rt->last_subscription);
1318 rtsp_send_cmd(s, cmd, reply, NULL);
1319 if (reply->status_code != RTSP_STATUS_OK)
1320 return AVERROR_INVALIDDATA;
1321 rt->need_subscription = 1;
1325 if (rt->need_subscription) {
1326 int r, rule_nr, first = 1;
1328 memcpy(rt->real_setup_cache, cache,
1329 sizeof(enum AVDiscard) * s->nb_streams);
1330 rt->last_subscription[0] = 0;
1332 snprintf(cmd, sizeof(cmd),
1333 "SET_PARAMETER %s RTSP/1.0\r\n"
1336 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1338 for (r = 0; r < s->nb_streams; r++) {
1339 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1340 if (s->streams[r]->discard != AVDISCARD_ALL) {
1342 av_strlcat(rt->last_subscription, ",",
1343 sizeof(rt->last_subscription));
1344 ff_rdt_subscribe_rule(
1345 rt->last_subscription,
1346 sizeof(rt->last_subscription), i, rule_nr);
1353 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1354 rtsp_send_cmd(s, cmd, reply, NULL);
1355 if (reply->status_code != RTSP_STATUS_OK)
1356 return AVERROR_INVALIDDATA;
1357 rt->need_subscription = 0;
1359 if (rt->state == RTSP_STATE_PLAYING)
1364 /* get next frames from the same RTP packet */
1366 if (rt->transport == RTSP_TRANSPORT_RDT)
1367 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
1369 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
1373 } else if (ret == 1) {
1380 /* read next RTP packet */
1382 switch(rt->lower_transport) {
1384 case RTSP_LOWER_TRANSPORT_TCP:
1385 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1387 case RTSP_LOWER_TRANSPORT_UDP:
1388 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1389 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1390 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
1391 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1396 if (rt->transport == RTSP_TRANSPORT_RDT)
1397 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1399 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1403 /* more packets may follow, so we save the RTP context */
1404 rt->cur_tx = rtsp_st->tx_ctx;
1409 static int rtsp_read_play(AVFormatContext *s)
1411 RTSPState *rt = s->priv_data;
1412 RTSPHeader reply1, *reply = &reply1;
1415 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1417 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1418 if (rt->state == RTSP_STATE_PAUSED) {
1419 snprintf(cmd, sizeof(cmd),
1420 "PLAY %s RTSP/1.0\r\n",
1423 snprintf(cmd, sizeof(cmd),
1424 "PLAY %s RTSP/1.0\r\n"
1425 "Range: npt=%0.3f-\r\n",
1427 (double)rt->seek_timestamp / AV_TIME_BASE);
1429 rtsp_send_cmd(s, cmd, reply, NULL);
1430 if (reply->status_code != RTSP_STATUS_OK) {
1434 rt->state = RTSP_STATE_PLAYING;
1438 /* pause the stream */
1439 static int rtsp_read_pause(AVFormatContext *s)
1441 RTSPState *rt = s->priv_data;
1442 RTSPHeader reply1, *reply = &reply1;
1447 if (rt->state != RTSP_STATE_PLAYING)
1449 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1450 snprintf(cmd, sizeof(cmd),
1451 "PAUSE %s RTSP/1.0\r\n",
1453 rtsp_send_cmd(s, cmd, reply, NULL);
1454 if (reply->status_code != RTSP_STATUS_OK) {
1458 rt->state = RTSP_STATE_PAUSED;
1462 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1463 int64_t timestamp, int flags)
1465 RTSPState *rt = s->priv_data;
1467 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1470 case RTSP_STATE_IDLE:
1472 case RTSP_STATE_PLAYING:
1473 if (rtsp_read_play(s) != 0)
1476 case RTSP_STATE_PAUSED:
1477 rt->state = RTSP_STATE_IDLE;
1483 static int rtsp_read_close(AVFormatContext *s)
1485 RTSPState *rt = s->priv_data;
1486 RTSPHeader reply1, *reply = &reply1;
1490 /* NOTE: it is valid to flush the buffer here */
1491 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1492 url_fclose(&rt->rtsp_gb);
1495 snprintf(cmd, sizeof(cmd),
1496 "TEARDOWN %s RTSP/1.0\r\n",
1498 rtsp_send_cmd(s, cmd, reply, NULL);
1500 rtsp_close_streams(rt);
1501 url_close(rt->rtsp_hd);
1505 #if CONFIG_RTSP_DEMUXER
1506 AVInputFormat rtsp_demuxer = {
1508 NULL_IF_CONFIG_SMALL("RTSP input format"),
1515 .flags = AVFMT_NOFILE,
1516 .read_play = rtsp_read_play,
1517 .read_pause = rtsp_read_pause,
1521 static int sdp_probe(AVProbeData *p1)
1523 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1525 /* we look for a line beginning "c=IN IP4" */
1526 while (p < p_end && *p != '\0') {
1527 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1528 return AVPROBE_SCORE_MAX / 2;
1530 while(p < p_end - 1 && *p != '\n') p++;
1539 #define SDP_MAX_SIZE 8192
1541 static int sdp_read_header(AVFormatContext *s,
1542 AVFormatParameters *ap)
1544 RTSPState *rt = s->priv_data;
1545 RTSPStream *rtsp_st;
1550 /* read the whole sdp file */
1551 /* XXX: better loading */
1552 content = av_malloc(SDP_MAX_SIZE);
1553 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1556 return AVERROR_INVALIDDATA;
1558 content[size] ='\0';
1560 sdp_parse(s, content);
1563 /* open each RTP stream */
1564 for(i=0;i<rt->nb_rtsp_streams;i++) {
1565 rtsp_st = rt->rtsp_streams[i];
1567 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1568 inet_ntoa(rtsp_st->sdp_ip),
1572 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1573 err = AVERROR_INVALIDDATA;
1576 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1581 rtsp_close_streams(rt);
1585 static int sdp_read_packet(AVFormatContext *s,
1588 return rtsp_read_packet(s, pkt);
1591 static int sdp_read_close(AVFormatContext *s)
1593 RTSPState *rt = s->priv_data;
1594 rtsp_close_streams(rt);
1598 #if CONFIG_SDP_DEMUXER
1599 AVInputFormat sdp_demuxer = {
1601 NULL_IF_CONFIG_SMALL("SDP"),
1610 #if CONFIG_REDIR_DEMUXER
1611 /* dummy redirector format (used directly in av_open_input_file now) */
1612 static int redir_probe(AVProbeData *pd)
1616 while (redir_isspace(*p))
1618 if (av_strstart(p, "http://", NULL) ||
1619 av_strstart(p, "rtsp://", NULL))
1620 return AVPROBE_SCORE_MAX;
1624 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1628 AVFormatContext *ic = NULL;
1629 ByteIOContext *f = s->pb;
1631 /* parse each URL and try to open it */
1633 while (c != URL_EOF) {
1636 if (!redir_isspace(c))
1645 if (c == URL_EOF || redir_isspace(c))
1647 if ((q - buf) < sizeof(buf) - 1)
1652 //printf("URL='%s'\n", buf);
1653 /* try to open the media file */
1654 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1658 return AVERROR(EIO);
1666 AVInputFormat redir_demuxer = {
1668 NULL_IF_CONFIG_SMALL("Redirector format"),