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;
328 int skip_media; ///< set if an unknown m= line occurs
331 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
332 int letter, const char *buf)
334 RTSPState *rt = s->priv_data;
335 char buf1[64], st_type[64];
337 enum CodecType codec_type;
341 struct in_addr sdp_ip;
345 printf("sdp: %c='%s'\n", letter, buf);
349 if (s1->skip_media && letter != 'm')
353 get_word(buf1, sizeof(buf1), &p);
354 if (strcmp(buf1, "IN") != 0)
356 get_word(buf1, sizeof(buf1), &p);
357 if (strcmp(buf1, "IP4") != 0)
359 get_word_sep(buf1, sizeof(buf1), "/", &p);
360 if (inet_aton(buf1, &sdp_ip) == 0)
365 get_word_sep(buf1, sizeof(buf1), "/", &p);
368 if (s->nb_streams == 0) {
369 s1->default_ip = sdp_ip;
370 s1->default_ttl = ttl;
372 st = s->streams[s->nb_streams - 1];
373 rtsp_st = st->priv_data;
374 rtsp_st->sdp_ip = sdp_ip;
375 rtsp_st->sdp_ttl = ttl;
379 av_strlcpy(s->title, p, sizeof(s->title));
382 if (s->nb_streams == 0) {
383 av_strlcpy(s->comment, p, sizeof(s->comment));
390 get_word(st_type, sizeof(st_type), &p);
391 if (!strcmp(st_type, "audio")) {
392 codec_type = CODEC_TYPE_AUDIO;
393 } else if (!strcmp(st_type, "video")) {
394 codec_type = CODEC_TYPE_VIDEO;
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 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;
497 } else if (s->nb_streams > 0) {
498 if (rt->server_type == RTSP_SERVER_REAL)
499 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
501 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
502 if (rtsp_st->dynamic_handler &&
503 rtsp_st->dynamic_handler->parse_sdp_a_line)
504 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
505 rtsp_st->dynamic_protocol_context, buf);
511 static int sdp_parse(AVFormatContext *s, const char *content)
515 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams,
516 * contain long SDP lines containing complete ASF Headers (several
517 * kB) or arrays of MDPR (RM stream descriptor) headers plus
518 * "rulebooks" describing their properties. Therefore, the SDP line
519 * buffer is large. */
521 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
523 memset(s1, 0, sizeof(SDPParseState));
534 /* get the content */
536 while (*p != '\n' && *p != '\r' && *p != '\0') {
537 if ((q - buf) < sizeof(buf) - 1)
542 sdp_parse_line(s, s1, letter, buf);
544 while (*p != '\n' && *p != '\0')
552 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
559 v = strtol(p, (char **)&p, 10);
563 v = strtol(p, (char **)&p, 10);
572 /* XXX: only one transport specification is parsed */
573 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
575 char transport_protocol[16];
577 char lower_transport[16];
579 RTSPTransportField *th;
582 reply->nb_transports = 0;
589 th = &reply->transports[reply->nb_transports];
591 get_word_sep(transport_protocol, sizeof(transport_protocol),
595 if (!strcasecmp (transport_protocol, "rtp")) {
596 get_word_sep(profile, sizeof(profile), "/;,", &p);
597 lower_transport[0] = '\0';
598 /* rtp/avp/<protocol> */
601 get_word_sep(lower_transport, sizeof(lower_transport),
604 th->transport = RTSP_TRANSPORT_RTP;
605 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
606 !strcasecmp (transport_protocol, "x-real-rdt")) {
607 /* x-pn-tng/<protocol> */
608 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
610 th->transport = RTSP_TRANSPORT_RDT;
612 if (!strcasecmp(lower_transport, "TCP"))
613 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
615 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
619 /* get each parameter */
620 while (*p != '\0' && *p != ',') {
621 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
622 if (!strcmp(parameter, "port")) {
625 rtsp_parse_range(&th->port_min, &th->port_max, &p);
627 } else if (!strcmp(parameter, "client_port")) {
630 rtsp_parse_range(&th->client_port_min,
631 &th->client_port_max, &p);
633 } else if (!strcmp(parameter, "server_port")) {
636 rtsp_parse_range(&th->server_port_min,
637 &th->server_port_max, &p);
639 } else if (!strcmp(parameter, "interleaved")) {
642 rtsp_parse_range(&th->interleaved_min,
643 &th->interleaved_max, &p);
645 } else if (!strcmp(parameter, "multicast")) {
646 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
647 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
648 } else if (!strcmp(parameter, "ttl")) {
651 th->ttl = strtol(p, (char **)&p, 10);
653 } else if (!strcmp(parameter, "destination")) {
654 struct in_addr ipaddr;
658 get_word_sep(buf, sizeof(buf), ";,", &p);
659 if (inet_aton(buf, &ipaddr))
660 th->destination = ntohl(ipaddr.s_addr);
663 while (*p != ';' && *p != '\0' && *p != ',')
671 reply->nb_transports++;
675 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
679 /* NOTE: we do case independent match for broken servers */
681 if (av_stristart(p, "Session:", &p)) {
682 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
683 } else if (av_stristart(p, "Content-Length:", &p)) {
684 reply->content_length = strtol(p, NULL, 10);
685 } else if (av_stristart(p, "Transport:", &p)) {
686 rtsp_parse_transport(reply, p);
687 } else if (av_stristart(p, "CSeq:", &p)) {
688 reply->seq = strtol(p, NULL, 10);
689 } else if (av_stristart(p, "Range:", &p)) {
690 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
691 } else if (av_stristart(p, "RealChallenge1:", &p)) {
693 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
694 } else if (av_stristart(p, "Server:", &p)) {
696 av_strlcpy(reply->server, p, sizeof(reply->server));
700 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
706 ret = url_read(h, buf+len, size-len);
714 /* skip a RTP/TCP interleaved packet */
715 static void rtsp_skip_packet(AVFormatContext *s)
717 RTSPState *rt = s->priv_data;
721 ret = url_readbuf(rt->rtsp_hd, buf, 3);
724 len = AV_RB16(buf + 1);
726 printf("skipping RTP packet len=%d\n", len);
731 if (len1 > sizeof(buf))
733 ret = url_readbuf(rt->rtsp_hd, buf, len1);
740 static void rtsp_send_cmd(AVFormatContext *s,
741 const char *cmd, RTSPHeader *reply,
742 unsigned char **content_ptr)
744 RTSPState *rt = s->priv_data;
745 char buf[4096], buf1[1024], *q;
748 int content_length, line_count;
749 unsigned char *content = NULL;
751 memset(reply, 0, sizeof(RTSPHeader));
754 av_strlcpy(buf, cmd, sizeof(buf));
755 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
756 av_strlcat(buf, buf1, sizeof(buf));
757 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
758 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
759 av_strlcat(buf, buf1, sizeof(buf));
761 av_strlcat(buf, "\r\n", sizeof(buf));
763 printf("Sending:\n%s--\n", buf);
765 url_write(rt->rtsp_hd, buf, strlen(buf));
767 /* parse reply (XXX: use buffers) */
769 rt->last_reply[0] = '\0';
773 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
778 /* XXX: only parse it if first char on line ? */
780 } else if (ch != '\r') {
781 if ((q - buf) < sizeof(buf) - 1)
787 printf("line='%s'\n", buf);
789 /* test if last line */
793 if (line_count == 0) {
795 get_word(buf1, sizeof(buf1), &p);
796 get_word(buf1, sizeof(buf1), &p);
797 reply->status_code = atoi(buf1);
799 rtsp_parse_line(reply, p);
800 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
801 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
806 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
807 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
809 content_length = reply->content_length;
810 if (content_length > 0) {
811 /* leave some room for a trailing '\0' (useful for simple parsing) */
812 content = av_malloc(content_length + 1);
813 (void)url_readbuf(rt->rtsp_hd, content, content_length);
814 content[content_length] = '\0';
817 *content_ptr = content;
823 /* close and free RTSP streams */
824 static void rtsp_close_streams(RTSPState *rt)
829 for(i=0;i<rt->nb_rtsp_streams;i++) {
830 rtsp_st = rt->rtsp_streams[i];
832 if (rtsp_st->tx_ctx) {
833 if (rt->transport == RTSP_TRANSPORT_RDT)
834 ff_rdt_parse_close(rtsp_st->tx_ctx);
836 rtp_parse_close(rtsp_st->tx_ctx);
838 if (rtsp_st->rtp_handle)
839 url_close(rtsp_st->rtp_handle);
840 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
841 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
844 av_free(rt->rtsp_streams);
848 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
850 RTSPState *rt = s->priv_data;
853 /* open the RTP context */
854 if (rtsp_st->stream_index >= 0)
855 st = s->streams[rtsp_st->stream_index];
857 s->ctx_flags |= AVFMTCTX_NOHEADER;
859 if (rt->transport == RTSP_TRANSPORT_RDT)
860 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
861 rtsp_st->dynamic_protocol_context,
862 rtsp_st->dynamic_handler);
864 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
865 rtsp_st->sdp_payload_type,
866 &rtsp_st->rtp_payload_data);
868 if (!rtsp_st->tx_ctx) {
869 return AVERROR(ENOMEM);
870 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
871 if(rtsp_st->dynamic_handler) {
872 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
873 rtsp_st->dynamic_protocol_context,
874 rtsp_st->dynamic_handler);
882 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
885 make_setup_request (AVFormatContext *s, const char *host, int port,
886 int lower_transport, const char *real_challenge)
888 RTSPState *rt = s->priv_data;
891 RTSPHeader reply1, *reply = &reply1;
893 const char *trans_pref;
895 if (rt->transport == RTSP_TRANSPORT_RDT)
896 trans_pref = "x-pn-tng";
898 trans_pref = "RTP/AVP";
900 /* for each stream, make the setup request */
901 /* XXX: we assume the same server is used for the control of each
904 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
905 char transport[2048];
907 rtsp_st = rt->rtsp_streams[i];
910 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
913 /* first try in specified port range */
914 if (RTSP_RTP_PORT_MIN != 0) {
915 while(j <= RTSP_RTP_PORT_MAX) {
916 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
917 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
918 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
924 /* then try on any port
925 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
926 ** err = AVERROR_INVALIDDATA;
932 port = rtp_get_local_port(rtsp_st->rtp_handle);
933 snprintf(transport, sizeof(transport) - 1,
934 "%s/UDP;", trans_pref);
935 if (rt->server_type != RTSP_SERVER_REAL)
936 av_strlcat(transport, "unicast;", sizeof(transport));
937 av_strlcatf(transport, sizeof(transport),
938 "client_port=%d", port);
939 if (rt->transport == RTSP_TRANSPORT_RTP)
940 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
944 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
945 snprintf(transport, sizeof(transport) - 1,
946 "%s/TCP", trans_pref);
949 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
950 snprintf(transport, sizeof(transport) - 1,
951 "%s/UDP;multicast", trans_pref);
953 if (rt->server_type == RTSP_SERVER_REAL)
954 av_strlcat(transport, ";mode=play", sizeof(transport));
955 snprintf(cmd, sizeof(cmd),
956 "SETUP %s RTSP/1.0\r\n"
958 rtsp_st->control_url, transport);
959 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
960 char real_res[41], real_csum[9];
961 ff_rdt_calc_response_and_checksum(real_res, real_csum,
963 av_strlcatf(cmd, sizeof(cmd),
965 "RealChallenge2: %s, sd=%s\r\n",
966 rt->session_id, real_res, real_csum);
968 rtsp_send_cmd(s, cmd, reply, NULL);
969 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
972 } else if (reply->status_code != RTSP_STATUS_OK ||
973 reply->nb_transports != 1) {
974 err = AVERROR_INVALIDDATA;
978 /* XXX: same protocol for all streams is required */
980 if (reply->transports[0].lower_transport != rt->lower_transport ||
981 reply->transports[0].transport != rt->transport) {
982 err = AVERROR_INVALIDDATA;
986 rt->lower_transport = reply->transports[0].lower_transport;
987 rt->transport = reply->transports[0].transport;
990 /* close RTP connection if not choosen */
991 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
992 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
993 url_close(rtsp_st->rtp_handle);
994 rtsp_st->rtp_handle = NULL;
997 switch(reply->transports[0].lower_transport) {
998 case RTSP_LOWER_TRANSPORT_TCP:
999 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1000 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1003 case RTSP_LOWER_TRANSPORT_UDP:
1007 /* XXX: also use address if specified */
1008 snprintf(url, sizeof(url), "rtp://%s:%d",
1009 host, reply->transports[0].server_port_min);
1010 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1011 err = AVERROR_INVALIDDATA;
1016 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1021 in.s_addr = htonl(reply->transports[0].destination);
1022 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1024 reply->transports[0].port_min,
1025 reply->transports[0].ttl);
1026 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1027 err = AVERROR_INVALIDDATA;
1034 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1038 if (rt->server_type == RTSP_SERVER_REAL)
1039 rt->need_subscription = 1;
1044 for (i=0; i<rt->nb_rtsp_streams; i++) {
1045 if (rt->rtsp_streams[i]->rtp_handle) {
1046 url_close(rt->rtsp_streams[i]->rtp_handle);
1047 rt->rtsp_streams[i]->rtp_handle = NULL;
1053 static int rtsp_read_header(AVFormatContext *s,
1054 AVFormatParameters *ap)
1056 RTSPState *rt = s->priv_data;
1057 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1058 URLContext *rtsp_hd;
1060 RTSPHeader reply1, *reply = &reply1;
1061 unsigned char *content = NULL;
1062 int lower_transport_mask = 0;
1063 char real_challenge[64];
1065 /* extract hostname and port */
1066 url_split(NULL, 0, NULL, 0,
1067 host, sizeof(host), &port, path, sizeof(path), s->filename);
1069 port = RTSP_DEFAULT_PORT;
1071 /* search for options */
1072 option_list = strchr(path, '?');
1074 /* remove the options from the path */
1076 while(option_list) {
1077 /* move the option pointer */
1078 option = option_list;
1079 option_list = strchr(option_list, '&');
1081 *(option_list++) = 0;
1082 /* handle the options */
1083 if (strcmp(option, "udp") == 0)
1084 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1085 else if (strcmp(option, "multicast") == 0)
1086 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1087 else if (strcmp(option, "tcp") == 0)
1088 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1092 if (!lower_transport_mask)
1093 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
1095 /* open the tcp connexion */
1096 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1097 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1098 return AVERROR(EIO);
1099 rt->rtsp_hd = rtsp_hd;
1102 /* request options supported by the server; this also detects server type */
1103 for (rt->server_type = RTSP_SERVER_RTP;;) {
1104 snprintf(cmd, sizeof(cmd),
1105 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1106 if (rt->server_type == RTSP_SERVER_REAL)
1109 * The following entries are required for proper
1110 * streaming from a Realmedia server. They are
1111 * interdependent in some way although we currently
1112 * don't quite understand how. Values were copied
1113 * from mplayer SVN r23589.
1114 * @param CompanyID is a 16-byte ID in base64
1115 * @param ClientChallenge is a 16-byte ID in hex
1117 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1118 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1119 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1120 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1122 rtsp_send_cmd(s, cmd, reply, NULL);
1123 if (reply->status_code != RTSP_STATUS_OK) {
1124 err = AVERROR_INVALIDDATA;
1128 /* detect server type if not standard-compliant RTP */
1129 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1130 rt->server_type = RTSP_SERVER_REAL;
1132 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1133 rt->server_type = RTSP_SERVER_WMS;
1134 } else if (rt->server_type == RTSP_SERVER_REAL) {
1135 strcpy(real_challenge, reply->real_challenge);
1140 /* describe the stream */
1141 snprintf(cmd, sizeof(cmd),
1142 "DESCRIBE %s RTSP/1.0\r\n"
1143 "Accept: application/sdp\r\n",
1145 if (rt->server_type == RTSP_SERVER_REAL) {
1147 * The Require: attribute is needed for proper streaming from
1148 * Realmedia servers.
1151 "Require: com.real.retain-entity-for-setup\r\n",
1154 rtsp_send_cmd(s, cmd, reply, &content);
1156 err = AVERROR_INVALIDDATA;
1159 if (reply->status_code != RTSP_STATUS_OK) {
1160 err = AVERROR_INVALIDDATA;
1164 /* now we got the SDP description, we parse it */
1165 ret = sdp_parse(s, (const char *)content);
1168 err = AVERROR_INVALIDDATA;
1173 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1175 err = make_setup_request(s, host, port, lower_transport,
1176 rt->server_type == RTSP_SERVER_REAL ?
1177 real_challenge : NULL);
1180 lower_transport_mask &= ~(1 << lower_transport);
1181 if (lower_transport_mask == 0 && err == 1) {
1182 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1187 rt->state = RTSP_STATE_IDLE;
1188 rt->seek_timestamp = 0; /* default is to start stream at position
1190 if (ap->initial_pause) {
1191 /* do not start immediately */
1193 if (rtsp_read_play(s) < 0) {
1194 err = AVERROR_INVALIDDATA;
1200 rtsp_close_streams(rt);
1202 url_close(rt->rtsp_hd);
1206 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1207 uint8_t *buf, int buf_size)
1209 RTSPState *rt = s->priv_data;
1210 int id, len, i, ret;
1211 RTSPStream *rtsp_st;
1213 #ifdef DEBUG_RTP_TCP
1214 printf("tcp_read_packet:\n");
1218 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1219 #ifdef DEBUG_RTP_TCP
1220 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1227 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1231 len = AV_RB16(buf + 1);
1232 #ifdef DEBUG_RTP_TCP
1233 printf("id=%d len=%d\n", id, len);
1235 if (len > buf_size || len < 12)
1238 ret = url_readbuf(rt->rtsp_hd, buf, len);
1241 if (rt->transport == RTSP_TRANSPORT_RDT &&
1242 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1245 /* find the matching stream */
1246 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1247 rtsp_st = rt->rtsp_streams[i];
1248 if (id >= rtsp_st->interleaved_min &&
1249 id <= rtsp_st->interleaved_max)
1254 *prtsp_st = rtsp_st;
1258 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1259 uint8_t *buf, int buf_size)
1261 RTSPState *rt = s->priv_data;
1262 RTSPStream *rtsp_st;
1264 int fd1, fd2, fd_max, n, i, ret;
1268 if (url_interrupt_cb())
1269 return AVERROR(EINTR);
1272 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1273 rtsp_st = rt->rtsp_streams[i];
1274 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1275 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1281 tv.tv_usec = 100 * 1000;
1282 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1284 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1285 rtsp_st = rt->rtsp_streams[i];
1286 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1287 if (FD_ISSET(fd1, &rfds)) {
1288 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1290 *prtsp_st = rtsp_st;
1299 static int rtsp_read_packet(AVFormatContext *s,
1302 RTSPState *rt = s->priv_data;
1303 RTSPStream *rtsp_st;
1305 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1307 if (rt->server_type == RTSP_SERVER_REAL) {
1309 RTSPHeader reply1, *reply = &reply1;
1310 enum AVDiscard cache[MAX_STREAMS];
1313 for (i = 0; i < s->nb_streams; i++)
1314 cache[i] = s->streams[i]->discard;
1316 if (!rt->need_subscription) {
1317 if (memcmp (cache, rt->real_setup_cache,
1318 sizeof(enum AVDiscard) * s->nb_streams)) {
1319 av_strlcatf(cmd, sizeof(cmd),
1320 "SET_PARAMETER %s RTSP/1.0\r\n"
1321 "Unsubscribe: %s\r\n",
1322 s->filename, rt->last_subscription);
1323 rtsp_send_cmd(s, cmd, reply, NULL);
1324 if (reply->status_code != RTSP_STATUS_OK)
1325 return AVERROR_INVALIDDATA;
1326 rt->need_subscription = 1;
1330 if (rt->need_subscription) {
1331 int r, rule_nr, first = 1;
1333 memcpy(rt->real_setup_cache, cache,
1334 sizeof(enum AVDiscard) * s->nb_streams);
1335 rt->last_subscription[0] = 0;
1337 snprintf(cmd, sizeof(cmd),
1338 "SET_PARAMETER %s RTSP/1.0\r\n"
1341 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1343 for (r = 0; r < s->nb_streams; r++) {
1344 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1345 if (s->streams[r]->discard != AVDISCARD_ALL) {
1347 av_strlcat(rt->last_subscription, ",",
1348 sizeof(rt->last_subscription));
1349 ff_rdt_subscribe_rule(
1350 rt->last_subscription,
1351 sizeof(rt->last_subscription), i, rule_nr);
1358 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1359 rtsp_send_cmd(s, cmd, reply, NULL);
1360 if (reply->status_code != RTSP_STATUS_OK)
1361 return AVERROR_INVALIDDATA;
1362 rt->need_subscription = 0;
1364 if (rt->state == RTSP_STATE_PLAYING)
1369 /* get next frames from the same RTP packet */
1371 if (rt->transport == RTSP_TRANSPORT_RDT)
1372 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
1374 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
1378 } else if (ret == 1) {
1385 /* read next RTP packet */
1387 switch(rt->lower_transport) {
1389 case RTSP_LOWER_TRANSPORT_TCP:
1390 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1392 case RTSP_LOWER_TRANSPORT_UDP:
1393 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1394 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1395 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
1396 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1401 if (rt->transport == RTSP_TRANSPORT_RDT)
1402 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1404 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1408 /* more packets may follow, so we save the RTP context */
1409 rt->cur_tx = rtsp_st->tx_ctx;
1414 static int rtsp_read_play(AVFormatContext *s)
1416 RTSPState *rt = s->priv_data;
1417 RTSPHeader reply1, *reply = &reply1;
1420 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1422 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1423 if (rt->state == RTSP_STATE_PAUSED) {
1424 snprintf(cmd, sizeof(cmd),
1425 "PLAY %s RTSP/1.0\r\n",
1428 snprintf(cmd, sizeof(cmd),
1429 "PLAY %s RTSP/1.0\r\n"
1430 "Range: npt=%0.3f-\r\n",
1432 (double)rt->seek_timestamp / AV_TIME_BASE);
1434 rtsp_send_cmd(s, cmd, reply, NULL);
1435 if (reply->status_code != RTSP_STATUS_OK) {
1439 rt->state = RTSP_STATE_PLAYING;
1443 /* pause the stream */
1444 static int rtsp_read_pause(AVFormatContext *s)
1446 RTSPState *rt = s->priv_data;
1447 RTSPHeader reply1, *reply = &reply1;
1452 if (rt->state != RTSP_STATE_PLAYING)
1454 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1455 snprintf(cmd, sizeof(cmd),
1456 "PAUSE %s RTSP/1.0\r\n",
1458 rtsp_send_cmd(s, cmd, reply, NULL);
1459 if (reply->status_code != RTSP_STATUS_OK) {
1463 rt->state = RTSP_STATE_PAUSED;
1467 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1468 int64_t timestamp, int flags)
1470 RTSPState *rt = s->priv_data;
1472 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1475 case RTSP_STATE_IDLE:
1477 case RTSP_STATE_PLAYING:
1478 if (rtsp_read_play(s) != 0)
1481 case RTSP_STATE_PAUSED:
1482 rt->state = RTSP_STATE_IDLE;
1488 static int rtsp_read_close(AVFormatContext *s)
1490 RTSPState *rt = s->priv_data;
1491 RTSPHeader reply1, *reply = &reply1;
1495 /* NOTE: it is valid to flush the buffer here */
1496 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1497 url_fclose(&rt->rtsp_gb);
1500 snprintf(cmd, sizeof(cmd),
1501 "TEARDOWN %s RTSP/1.0\r\n",
1503 rtsp_send_cmd(s, cmd, reply, NULL);
1505 rtsp_close_streams(rt);
1506 url_close(rt->rtsp_hd);
1510 #if CONFIG_RTSP_DEMUXER
1511 AVInputFormat rtsp_demuxer = {
1513 NULL_IF_CONFIG_SMALL("RTSP input format"),
1520 .flags = AVFMT_NOFILE,
1521 .read_play = rtsp_read_play,
1522 .read_pause = rtsp_read_pause,
1526 static int sdp_probe(AVProbeData *p1)
1528 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1530 /* we look for a line beginning "c=IN IP4" */
1531 while (p < p_end && *p != '\0') {
1532 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1533 return AVPROBE_SCORE_MAX / 2;
1535 while(p < p_end - 1 && *p != '\n') p++;
1544 #define SDP_MAX_SIZE 8192
1546 static int sdp_read_header(AVFormatContext *s,
1547 AVFormatParameters *ap)
1549 RTSPState *rt = s->priv_data;
1550 RTSPStream *rtsp_st;
1555 /* read the whole sdp file */
1556 /* XXX: better loading */
1557 content = av_malloc(SDP_MAX_SIZE);
1558 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1561 return AVERROR_INVALIDDATA;
1563 content[size] ='\0';
1565 sdp_parse(s, content);
1568 /* open each RTP stream */
1569 for(i=0;i<rt->nb_rtsp_streams;i++) {
1570 rtsp_st = rt->rtsp_streams[i];
1572 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1573 inet_ntoa(rtsp_st->sdp_ip),
1577 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1578 err = AVERROR_INVALIDDATA;
1581 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1586 rtsp_close_streams(rt);
1590 static int sdp_read_packet(AVFormatContext *s,
1593 return rtsp_read_packet(s, pkt);
1596 static int sdp_read_close(AVFormatContext *s)
1598 RTSPState *rt = s->priv_data;
1599 rtsp_close_streams(rt);
1603 #if CONFIG_SDP_DEMUXER
1604 AVInputFormat sdp_demuxer = {
1606 NULL_IF_CONFIG_SMALL("SDP"),
1615 #if CONFIG_REDIR_DEMUXER
1616 /* dummy redirector format (used directly in av_open_input_file now) */
1617 static int redir_probe(AVProbeData *pd)
1621 while (redir_isspace(*p))
1623 if (av_strstart(p, "http://", NULL) ||
1624 av_strstart(p, "rtsp://", NULL))
1625 return AVPROBE_SCORE_MAX;
1629 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1633 AVFormatContext *ic = NULL;
1634 ByteIOContext *f = s->pb;
1636 /* parse each URL and try to open it */
1638 while (c != URL_EOF) {
1641 if (!redir_isspace(c))
1650 if (c == URL_EOF || redir_isspace(c))
1652 if ((q - buf) < sizeof(buf) - 1)
1657 //printf("URL='%s'\n", buf);
1658 /* try to open the media file */
1659 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1663 return AVERROR(EIO);
1671 AVInputFormat redir_demuxer = {
1673 NULL_IF_CONFIG_SMALL("Redirector format"),