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"
29 #ifdef HAVE_SYS_SELECT_H
30 #include <sys/select.h>
36 #include "rtp_internal.h"
40 //#define DEBUG_RTP_TCP
42 static int rtsp_read_play(AVFormatContext *s);
44 /* XXX: currently, the only way to change the protocols consists in
45 changing this variable */
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 static int redir_isspace(int c)
60 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
63 static void skip_spaces(const char **pp)
67 while (redir_isspace(*p))
72 static void get_word_sep(char *buf, int buf_size, const char *sep,
83 while (!strchr(sep, *p) && *p != '\0') {
84 if ((q - buf) < buf_size - 1)
93 static void get_word(char *buf, int buf_size, const char **pp)
101 while (!redir_isspace(*p) && *p != '\0') {
102 if ((q - buf) < buf_size - 1)
111 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
113 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
120 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
121 see if we can handle this kind of payload */
122 get_word_sep(buf, sizeof(buf), "/", &p);
123 if (payload_type >= RTP_PT_PRIVATE) {
124 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
126 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
127 codec->codec_id = handler->codec_id;
128 rtsp_st->dynamic_handler= handler;
130 rtsp_st->dynamic_protocol_context= handler->open();
134 handler= handler->next;
137 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
138 /* search into AVRtpPayloadTypes[] */
139 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
142 c = avcodec_find_decoder(codec->codec_id);
146 c_name = (char *)NULL;
149 get_word_sep(buf, sizeof(buf), "/", &p);
151 switch (codec->codec_type) {
152 case CODEC_TYPE_AUDIO:
153 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
154 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
155 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
157 codec->sample_rate = i;
158 get_word_sep(buf, sizeof(buf), "/", &p);
162 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
163 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
165 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
166 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
168 case CODEC_TYPE_VIDEO:
169 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
180 /* return the length and optionnaly the data */
181 static int hex_to_data(uint8_t *data, const char *p)
191 c = toupper((unsigned char)*p++);
192 if (c >= '0' && c <= '9')
194 else if (c >= 'A' && c <= 'F')
209 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
211 switch (codec->codec_id) {
214 if (!strcmp(attr, "config")) {
215 /* decode the hexa encoded parameter */
216 int len = hex_to_data(NULL, value);
217 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
218 if (!codec->extradata)
220 codec->extradata_size = len;
221 hex_to_data(codec->extradata, value);
236 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
237 #define ATTR_NAME_TYPE_INT 0
238 #define ATTR_NAME_TYPE_STR 1
239 static const AttrNameMap attr_names[]=
241 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, sizelength)},
242 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexlength)},
243 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, indexdeltalength)},
244 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, profile_level_id)},
245 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(RTPPayloadData, streamtype)},
246 {"mode", ATTR_NAME_TYPE_STR, offsetof(RTPPayloadData, mode)},
250 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
251 * because it is used in rtp_h264.c, which is forthcoming.
253 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
258 get_word_sep(attr, attr_size, "=", p);
261 get_word_sep(value, value_size, ";", p);
269 /* parse a SDP line and save stream attributes */
270 static void sdp_parse_fmtp(AVStream *st, const char *p)
276 RTSPStream *rtsp_st = st->priv_data;
277 AVCodecContext *codec = st->codec;
278 RTPPayloadData *rtp_payload_data = &rtsp_st->rtp_payload_data;
280 /* loop on each attribute */
281 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
283 /* grab the codec extra_data from the config parameter of the fmtp line */
284 sdp_parse_fmtp_config(codec, attr, value);
285 /* Looking for a known attribute */
286 for (i = 0; attr_names[i].str; ++i) {
287 if (!strcasecmp(attr, attr_names[i].str)) {
288 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
289 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
290 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
291 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
297 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
299 * Used for seeking in the rtp stream.
301 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
306 if (!av_stristart(p, "npt=", &p))
309 *start = AV_NOPTS_VALUE;
310 *end = AV_NOPTS_VALUE;
312 get_word_sep(buf, sizeof(buf), "-", &p);
313 *start = parse_date(buf, 1);
316 get_word_sep(buf, sizeof(buf), "-", &p);
317 *end = parse_date(buf, 1);
319 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
320 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
323 typedef struct SDPParseState {
325 struct in_addr default_ip;
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);
349 get_word(buf1, sizeof(buf1), &p);
350 if (strcmp(buf1, "IN") != 0)
352 get_word(buf1, sizeof(buf1), &p);
353 if (strcmp(buf1, "IP4") != 0)
355 get_word_sep(buf1, sizeof(buf1), "/", &p);
356 if (inet_aton(buf1, &sdp_ip) == 0)
361 get_word_sep(buf1, sizeof(buf1), "/", &p);
364 if (s->nb_streams == 0) {
365 s1->default_ip = sdp_ip;
366 s1->default_ttl = ttl;
368 st = s->streams[s->nb_streams - 1];
369 rtsp_st = st->priv_data;
370 rtsp_st->sdp_ip = sdp_ip;
371 rtsp_st->sdp_ttl = ttl;
375 av_strlcpy(s->title, p, sizeof(s->title));
378 if (s->nb_streams == 0) {
379 av_strlcpy(s->comment, p, sizeof(s->comment));
385 get_word(st_type, sizeof(st_type), &p);
386 if (!strcmp(st_type, "audio")) {
387 codec_type = CODEC_TYPE_AUDIO;
388 } else if (!strcmp(st_type, "video")) {
389 codec_type = CODEC_TYPE_VIDEO;
393 rtsp_st = av_mallocz(sizeof(RTSPStream));
396 rtsp_st->stream_index = -1;
397 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
399 rtsp_st->sdp_ip = s1->default_ip;
400 rtsp_st->sdp_ttl = s1->default_ttl;
402 get_word(buf1, sizeof(buf1), &p); /* port */
403 rtsp_st->sdp_port = atoi(buf1);
405 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
407 /* XXX: handle list of formats */
408 get_word(buf1, sizeof(buf1), &p); /* format list */
409 rtsp_st->sdp_payload_type = atoi(buf1);
411 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
412 /* no corresponding stream */
414 st = av_new_stream(s, 0);
417 st->priv_data = rtsp_st;
418 rtsp_st->stream_index = st->index;
419 st->codec->codec_type = codec_type;
420 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
421 /* if standard payload type, we can find the codec right now */
422 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
425 /* put a default control url */
426 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
429 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
431 /* get the control url */
432 st = s->streams[s->nb_streams - 1];
433 rtsp_st = st->priv_data;
435 /* XXX: may need to add full url resolution */
436 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
437 if (proto[0] == '\0') {
438 /* relative control URL */
439 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
440 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
442 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
444 } else if (av_strstart(p, "rtpmap:", &p) && s->nb_streams > 0) {
445 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
446 get_word(buf1, sizeof(buf1), &p);
447 payload_type = atoi(buf1);
448 st = s->streams[s->nb_streams - 1];
449 rtsp_st = st->priv_data;
450 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
451 } else if (av_strstart(p, "fmtp:", &p)) {
452 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
453 get_word(buf1, sizeof(buf1), &p);
454 payload_type = atoi(buf1);
455 for(i = 0; i < s->nb_streams;i++) {
457 rtsp_st = st->priv_data;
458 if (rtsp_st->sdp_payload_type == payload_type) {
459 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
460 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf)) {
461 sdp_parse_fmtp(st, p);
464 sdp_parse_fmtp(st, p);
468 } else if(av_strstart(p, "framesize:", &p)) {
469 // let dynamic protocol handlers have a stab at the line.
470 get_word(buf1, sizeof(buf1), &p);
471 payload_type = atoi(buf1);
472 for(i = 0; i < s->nb_streams;i++) {
474 rtsp_st = st->priv_data;
475 if (rtsp_st->sdp_payload_type == payload_type) {
476 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
477 rtsp_st->dynamic_handler->parse_sdp_a_line(s, i, rtsp_st->dynamic_protocol_context, buf);
481 } else if(av_strstart(p, "range:", &p)) {
484 // this is so that seeking on a streamed file can work.
485 rtsp_parse_range_npt(p, &start, &end);
486 s->start_time= start;
487 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
488 } else if (av_strstart(p, "IsRealDataType:integer;",&p)) {
490 rt->transport = RTSP_TRANSPORT_RDT;
491 } else if (s->nb_streams > 0) {
492 if (rt->server_type == RTSP_SERVER_REAL)
493 ff_real_parse_sdp_a_line(s, s->nb_streams - 1, p);
495 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
496 if (rtsp_st->dynamic_handler &&
497 rtsp_st->dynamic_handler->parse_sdp_a_line)
498 rtsp_st->dynamic_handler->parse_sdp_a_line(s, s->nb_streams - 1,
499 rtsp_st->dynamic_protocol_context, buf);
505 static int sdp_parse(AVFormatContext *s, const char *content)
509 /* Some SDP lines, particularly for Realmedia or ASF RTSP streams, contain long SDP
510 * lines containing complete ASF Headers (several kB) or arrays of MDPR (RM stream
511 * descriptor) headers plus "rulebooks" describing their properties. Therefore, the
512 * SDP line buffer is large. */
514 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
516 memset(s1, 0, sizeof(SDPParseState));
527 /* get the content */
529 while (*p != '\n' && *p != '\r' && *p != '\0') {
530 if ((q - buf) < sizeof(buf) - 1)
535 sdp_parse_line(s, s1, letter, buf);
537 while (*p != '\n' && *p != '\0')
545 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
552 v = strtol(p, (char **)&p, 10);
556 v = strtol(p, (char **)&p, 10);
565 /* XXX: only one transport specification is parsed */
566 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
568 char transport_protocol[16];
570 char lower_transport[16];
572 RTSPTransportField *th;
575 reply->nb_transports = 0;
582 th = &reply->transports[reply->nb_transports];
584 get_word_sep(transport_protocol, sizeof(transport_protocol),
588 if (!strcasecmp (transport_protocol, "rtp")) {
589 get_word_sep(profile, sizeof(profile), "/;,", &p);
590 lower_transport[0] = '\0';
591 /* rtp/avp/<protocol> */
594 get_word_sep(lower_transport, sizeof(lower_transport),
597 th->transport = RTSP_TRANSPORT_RTP;
598 } else if (!strcasecmp (transport_protocol, "x-pn-tng") ||
599 !strcasecmp (transport_protocol, "x-real-rdt")) {
600 /* x-pn-tng/<protocol> */
601 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
603 th->transport = RTSP_TRANSPORT_RDT;
605 if (!strcasecmp(lower_transport, "TCP"))
606 th->lower_transport = RTSP_LOWER_TRANSPORT_TCP;
608 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP;
612 /* get each parameter */
613 while (*p != '\0' && *p != ',') {
614 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
615 if (!strcmp(parameter, "port")) {
618 rtsp_parse_range(&th->port_min, &th->port_max, &p);
620 } else if (!strcmp(parameter, "client_port")) {
623 rtsp_parse_range(&th->client_port_min,
624 &th->client_port_max, &p);
626 } else if (!strcmp(parameter, "server_port")) {
629 rtsp_parse_range(&th->server_port_min,
630 &th->server_port_max, &p);
632 } else if (!strcmp(parameter, "interleaved")) {
635 rtsp_parse_range(&th->interleaved_min,
636 &th->interleaved_max, &p);
638 } else if (!strcmp(parameter, "multicast")) {
639 if (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP)
640 th->lower_transport = RTSP_LOWER_TRANSPORT_UDP_MULTICAST;
641 } else if (!strcmp(parameter, "ttl")) {
644 th->ttl = strtol(p, (char **)&p, 10);
646 } else if (!strcmp(parameter, "destination")) {
647 struct in_addr ipaddr;
651 get_word_sep(buf, sizeof(buf), ";,", &p);
652 if (inet_aton(buf, &ipaddr))
653 th->destination = ntohl(ipaddr.s_addr);
656 while (*p != ';' && *p != '\0' && *p != ',')
664 reply->nb_transports++;
668 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
672 /* NOTE: we do case independent match for broken servers */
674 if (av_stristart(p, "Session:", &p)) {
675 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
676 } else if (av_stristart(p, "Content-Length:", &p)) {
677 reply->content_length = strtol(p, NULL, 10);
678 } else if (av_stristart(p, "Transport:", &p)) {
679 rtsp_parse_transport(reply, p);
680 } else if (av_stristart(p, "CSeq:", &p)) {
681 reply->seq = strtol(p, NULL, 10);
682 } else if (av_stristart(p, "Range:", &p)) {
683 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
684 } else if (av_stristart(p, "RealChallenge1:", &p)) {
686 av_strlcpy(reply->real_challenge, p, sizeof(reply->real_challenge));
687 } else if (av_stristart(p, "Server:", &p)) {
689 av_strlcpy(reply->server, p, sizeof(reply->server));
693 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
699 ret = url_read(h, buf+len, size-len);
707 /* skip a RTP/TCP interleaved packet */
708 static void rtsp_skip_packet(AVFormatContext *s)
710 RTSPState *rt = s->priv_data;
714 ret = url_readbuf(rt->rtsp_hd, buf, 3);
717 len = AV_RB16(buf + 1);
719 printf("skipping RTP packet len=%d\n", len);
724 if (len1 > sizeof(buf))
726 ret = url_readbuf(rt->rtsp_hd, buf, len1);
733 static void rtsp_send_cmd(AVFormatContext *s,
734 const char *cmd, RTSPHeader *reply,
735 unsigned char **content_ptr)
737 RTSPState *rt = s->priv_data;
738 char buf[4096], buf1[1024], *q;
741 int content_length, line_count;
742 unsigned char *content = NULL;
744 memset(reply, 0, sizeof(RTSPHeader));
747 av_strlcpy(buf, cmd, sizeof(buf));
748 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
749 av_strlcat(buf, buf1, sizeof(buf));
750 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
751 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
752 av_strlcat(buf, buf1, sizeof(buf));
754 av_strlcat(buf, "\r\n", sizeof(buf));
756 printf("Sending:\n%s--\n", buf);
758 url_write(rt->rtsp_hd, buf, strlen(buf));
760 /* parse reply (XXX: use buffers) */
762 rt->last_reply[0] = '\0';
766 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
771 /* XXX: only parse it if first char on line ? */
773 } else if (ch != '\r') {
774 if ((q - buf) < sizeof(buf) - 1)
780 printf("line='%s'\n", buf);
782 /* test if last line */
786 if (line_count == 0) {
788 get_word(buf1, sizeof(buf1), &p);
789 get_word(buf1, sizeof(buf1), &p);
790 reply->status_code = atoi(buf1);
792 rtsp_parse_line(reply, p);
793 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
794 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
799 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
800 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
802 content_length = reply->content_length;
803 if (content_length > 0) {
804 /* leave some room for a trailing '\0' (useful for simple parsing) */
805 content = av_malloc(content_length + 1);
806 (void)url_readbuf(rt->rtsp_hd, content, content_length);
807 content[content_length] = '\0';
810 *content_ptr = content;
816 /* close and free RTSP streams */
817 static void rtsp_close_streams(RTSPState *rt)
822 for(i=0;i<rt->nb_rtsp_streams;i++) {
823 rtsp_st = rt->rtsp_streams[i];
825 if (rtsp_st->tx_ctx) {
826 if (rt->transport == RTSP_TRANSPORT_RDT)
827 ff_rdt_parse_close(rtsp_st->tx_ctx);
829 rtp_parse_close(rtsp_st->tx_ctx);
831 if (rtsp_st->rtp_handle)
832 url_close(rtsp_st->rtp_handle);
833 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
834 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
837 av_free(rt->rtsp_streams);
841 rtsp_open_transport_ctx(AVFormatContext *s, RTSPStream *rtsp_st)
843 RTSPState *rt = s->priv_data;
846 /* open the RTP context */
847 if (rtsp_st->stream_index >= 0)
848 st = s->streams[rtsp_st->stream_index];
850 s->ctx_flags |= AVFMTCTX_NOHEADER;
852 if (rt->transport == RTSP_TRANSPORT_RDT)
853 rtsp_st->tx_ctx = ff_rdt_parse_open(s, st->index,
854 rtsp_st->dynamic_protocol_context,
855 rtsp_st->dynamic_handler);
857 rtsp_st->tx_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle,
858 rtsp_st->sdp_payload_type,
859 &rtsp_st->rtp_payload_data);
861 if (!rtsp_st->tx_ctx) {
862 return AVERROR(ENOMEM);
863 } else if (rt->transport != RTSP_TRANSPORT_RDT) {
864 if(rtsp_st->dynamic_handler) {
865 rtp_parse_set_dynamic_protocol(rtsp_st->tx_ctx,
866 rtsp_st->dynamic_protocol_context,
867 rtsp_st->dynamic_handler);
875 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
878 make_setup_request (AVFormatContext *s, const char *host, int port,
879 int lower_transport, const char *real_challenge)
881 RTSPState *rt = s->priv_data;
884 RTSPHeader reply1, *reply = &reply1;
886 const char *trans_pref;
888 if (rt->transport == RTSP_TRANSPORT_RDT)
889 trans_pref = "x-pn-tng";
891 trans_pref = "RTP/AVP";
893 /* for each stream, make the setup request */
894 /* XXX: we assume the same server is used for the control of each
897 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
898 char transport[2048];
900 rtsp_st = rt->rtsp_streams[i];
903 if (lower_transport == RTSP_LOWER_TRANSPORT_UDP) {
906 /* first try in specified port range */
907 if (RTSP_RTP_PORT_MIN != 0) {
908 while(j <= RTSP_RTP_PORT_MAX) {
909 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
910 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
911 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
917 /* then try on any port
918 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
919 ** err = AVERROR_INVALIDDATA;
925 port = rtp_get_local_port(rtsp_st->rtp_handle);
926 snprintf(transport, sizeof(transport) - 1,
927 "%s/UDP;", trans_pref);
928 if (rt->server_type != RTSP_SERVER_REAL)
929 av_strlcat(transport, "unicast;", sizeof(transport));
930 av_strlcatf(transport, sizeof(transport),
931 "client_port=%d", port);
932 if (rt->transport == RTSP_TRANSPORT_RTP)
933 av_strlcatf(transport, sizeof(transport), "-%d", port + 1);
937 else if (lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
938 snprintf(transport, sizeof(transport) - 1,
939 "%s/TCP", trans_pref);
942 else if (lower_transport == RTSP_LOWER_TRANSPORT_UDP_MULTICAST) {
943 snprintf(transport, sizeof(transport) - 1,
944 "%s/UDP;multicast", trans_pref);
946 if (rt->server_type == RTSP_SERVER_REAL)
947 av_strlcat(transport, ";mode=play", sizeof(transport));
948 snprintf(cmd, sizeof(cmd),
949 "SETUP %s RTSP/1.0\r\n"
951 rtsp_st->control_url, transport);
952 if (i == 0 && rt->server_type == RTSP_SERVER_REAL) {
953 char real_res[41], real_csum[9];
954 ff_rdt_calc_response_and_checksum(real_res, real_csum,
956 av_strlcatf(cmd, sizeof(cmd),
958 "RealChallenge2: %s, sd=%s\r\n",
959 rt->session_id, real_res, real_csum);
961 rtsp_send_cmd(s, cmd, reply, NULL);
962 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
965 } else if (reply->status_code != RTSP_STATUS_OK ||
966 reply->nb_transports != 1) {
967 err = AVERROR_INVALIDDATA;
971 /* XXX: same protocol for all streams is required */
973 if (reply->transports[0].lower_transport != rt->lower_transport ||
974 reply->transports[0].transport != rt->transport) {
975 err = AVERROR_INVALIDDATA;
979 rt->lower_transport = reply->transports[0].lower_transport;
980 rt->transport = reply->transports[0].transport;
983 /* close RTP connection if not choosen */
984 if (reply->transports[0].lower_transport != RTSP_LOWER_TRANSPORT_UDP &&
985 (lower_transport == RTSP_LOWER_TRANSPORT_UDP)) {
986 url_close(rtsp_st->rtp_handle);
987 rtsp_st->rtp_handle = NULL;
990 switch(reply->transports[0].lower_transport) {
991 case RTSP_LOWER_TRANSPORT_TCP:
992 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
993 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
996 case RTSP_LOWER_TRANSPORT_UDP:
1000 /* XXX: also use address if specified */
1001 snprintf(url, sizeof(url), "rtp://%s:%d",
1002 host, reply->transports[0].server_port_min);
1003 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1004 err = AVERROR_INVALIDDATA;
1009 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1014 in.s_addr = htonl(reply->transports[0].destination);
1015 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
1017 reply->transports[0].port_min,
1018 reply->transports[0].ttl);
1019 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1020 err = AVERROR_INVALIDDATA;
1027 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1031 if (rt->server_type == RTSP_SERVER_REAL)
1032 rt->need_subscription = 1;
1037 for (i=0; i<rt->nb_rtsp_streams; i++) {
1038 if (rt->rtsp_streams[i]->rtp_handle) {
1039 url_close(rt->rtsp_streams[i]->rtp_handle);
1040 rt->rtsp_streams[i]->rtp_handle = NULL;
1046 static int rtsp_read_header(AVFormatContext *s,
1047 AVFormatParameters *ap)
1049 RTSPState *rt = s->priv_data;
1050 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1051 URLContext *rtsp_hd;
1053 RTSPHeader reply1, *reply = &reply1;
1054 unsigned char *content = NULL;
1055 int lower_transport_mask = 0;
1056 char real_challenge[64];
1058 /* extract hostname and port */
1059 url_split(NULL, 0, NULL, 0,
1060 host, sizeof(host), &port, path, sizeof(path), s->filename);
1062 port = RTSP_DEFAULT_PORT;
1064 /* search for options */
1065 option_list = strchr(path, '?');
1067 /* remove the options from the path */
1069 while(option_list) {
1070 /* move the option pointer */
1071 option = option_list;
1072 option_list = strchr(option_list, '&');
1074 *(option_list++) = 0;
1075 /* handle the options */
1076 if (strcmp(option, "udp") == 0)
1077 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP);
1078 else if (strcmp(option, "multicast") == 0)
1079 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
1080 else if (strcmp(option, "tcp") == 0)
1081 lower_transport_mask = (1<< RTSP_LOWER_TRANSPORT_TCP);
1085 if (!lower_transport_mask)
1086 lower_transport_mask = (1 << RTSP_LOWER_TRANSPORT_LAST) - 1;
1088 /* open the tcp connexion */
1089 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1090 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1091 return AVERROR(EIO);
1092 rt->rtsp_hd = rtsp_hd;
1095 /* request options supported by the server; this also detects server type */
1096 for (rt->server_type = RTSP_SERVER_RTP;;) {
1097 snprintf(cmd, sizeof(cmd),
1098 "OPTIONS %s RTSP/1.0\r\n", s->filename);
1099 if (rt->server_type == RTSP_SERVER_REAL)
1102 * The following entries are required for proper
1103 * streaming from a Realmedia server. They are
1104 * interdependent in some way although we currently
1105 * don't quite understand how. Values were copied
1106 * from mplayer SVN r23589.
1107 * @param CompanyID is a 16-byte ID in base64
1108 * @param ClientChallenge is a 16-byte ID in hex
1110 "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7\r\n"
1111 "PlayerStarttime: [28/03/2003:22:50:23 00:00]\r\n"
1112 "CompanyID: KnKV4M4I/B2FjJ1TToLycw==\r\n"
1113 "GUID: 00000000-0000-0000-0000-000000000000\r\n",
1115 rtsp_send_cmd(s, cmd, reply, NULL);
1116 if (reply->status_code != RTSP_STATUS_OK) {
1117 err = AVERROR_INVALIDDATA;
1121 /* detect server type if not standard-compliant RTP */
1122 if (rt->server_type != RTSP_SERVER_REAL && reply->real_challenge[0]) {
1123 rt->server_type = RTSP_SERVER_REAL;
1125 } else if (!strncasecmp(reply->server, "WMServer/", 9)) {
1126 rt->server_type = RTSP_SERVER_WMS;
1127 } else if (rt->server_type == RTSP_SERVER_REAL) {
1128 strcpy(real_challenge, reply->real_challenge);
1133 /* describe the stream */
1134 snprintf(cmd, sizeof(cmd),
1135 "DESCRIBE %s RTSP/1.0\r\n"
1136 "Accept: application/sdp\r\n",
1138 if (rt->server_type == RTSP_SERVER_REAL) {
1140 * The Require: attribute is needed for proper streaming from
1141 * Realmedia servers.
1144 "Require: com.real.retain-entity-for-setup\r\n",
1147 rtsp_send_cmd(s, cmd, reply, &content);
1149 err = AVERROR_INVALIDDATA;
1152 if (reply->status_code != RTSP_STATUS_OK) {
1153 err = AVERROR_INVALIDDATA;
1157 /* now we got the SDP description, we parse it */
1158 ret = sdp_parse(s, (const char *)content);
1161 err = AVERROR_INVALIDDATA;
1166 int lower_transport = ff_log2_tab[lower_transport_mask & ~(lower_transport_mask - 1)];
1168 err = make_setup_request(s, host, port, lower_transport,
1169 rt->server_type == RTSP_SERVER_REAL ?
1170 real_challenge : NULL);
1173 lower_transport_mask &= ~(1 << lower_transport);
1174 if (lower_transport_mask == 0 && err == 1) {
1175 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1180 rt->state = RTSP_STATE_IDLE;
1181 rt->seek_timestamp = 0; /* default is to start stream at position
1183 if (ap->initial_pause) {
1184 /* do not start immediately */
1186 if (rtsp_read_play(s) < 0) {
1187 err = AVERROR_INVALIDDATA;
1193 rtsp_close_streams(rt);
1195 url_close(rt->rtsp_hd);
1199 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1200 uint8_t *buf, int buf_size)
1202 RTSPState *rt = s->priv_data;
1203 int id, len, i, ret;
1204 RTSPStream *rtsp_st;
1206 #ifdef DEBUG_RTP_TCP
1207 printf("tcp_read_packet:\n");
1211 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1212 #ifdef DEBUG_RTP_TCP
1213 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1220 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1224 len = AV_RB16(buf + 1);
1225 #ifdef DEBUG_RTP_TCP
1226 printf("id=%d len=%d\n", id, len);
1228 if (len > buf_size || len < 12)
1231 ret = url_readbuf(rt->rtsp_hd, buf, len);
1234 if (rt->transport == RTSP_TRANSPORT_RDT &&
1235 ff_rdt_parse_header(buf, len, &id, NULL, NULL, NULL, NULL) < 0)
1238 /* find the matching stream */
1239 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1240 rtsp_st = rt->rtsp_streams[i];
1241 if (id >= rtsp_st->interleaved_min &&
1242 id <= rtsp_st->interleaved_max)
1247 *prtsp_st = rtsp_st;
1251 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1252 uint8_t *buf, int buf_size)
1254 RTSPState *rt = s->priv_data;
1255 RTSPStream *rtsp_st;
1257 int fd1, fd2, fd_max, n, i, ret;
1261 if (url_interrupt_cb())
1262 return AVERROR(EINTR);
1265 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1266 rtsp_st = rt->rtsp_streams[i];
1267 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1268 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1274 tv.tv_usec = 100 * 1000;
1275 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1277 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1278 rtsp_st = rt->rtsp_streams[i];
1279 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1280 if (FD_ISSET(fd1, &rfds)) {
1281 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1283 *prtsp_st = rtsp_st;
1292 static int rtsp_read_packet(AVFormatContext *s,
1295 RTSPState *rt = s->priv_data;
1296 RTSPStream *rtsp_st;
1298 uint8_t buf[10 * RTP_MAX_PACKET_LENGTH];
1300 if (rt->server_type == RTSP_SERVER_REAL) {
1302 RTSPHeader reply1, *reply = &reply1;
1303 enum AVDiscard cache[MAX_STREAMS];
1306 for (i = 0; i < s->nb_streams; i++)
1307 cache[i] = s->streams[i]->discard;
1309 if (!rt->need_subscription) {
1310 if (memcmp (cache, rt->real_setup_cache,
1311 sizeof(enum AVDiscard) * s->nb_streams)) {
1312 av_strlcatf(cmd, sizeof(cmd),
1313 "SET_PARAMETER %s RTSP/1.0\r\n"
1314 "Unsubscribe: %s\r\n",
1315 s->filename, rt->last_subscription);
1316 rtsp_send_cmd(s, cmd, reply, NULL);
1317 if (reply->status_code != RTSP_STATUS_OK)
1318 return AVERROR_INVALIDDATA;
1319 rt->need_subscription = 1;
1323 if (rt->need_subscription) {
1324 int r, rule_nr, first = 1;
1326 memcpy(rt->real_setup_cache, cache,
1327 sizeof(enum AVDiscard) * s->nb_streams);
1328 rt->last_subscription[0] = 0;
1330 snprintf(cmd, sizeof(cmd),
1331 "SET_PARAMETER %s RTSP/1.0\r\n"
1334 for (i = 0; i < rt->nb_rtsp_streams; i++) {
1336 for (r = 0; r < s->nb_streams; r++) {
1337 if (s->streams[r]->priv_data == rt->rtsp_streams[i]) {
1338 if (s->streams[r]->discard != AVDISCARD_ALL) {
1340 av_strlcat(rt->last_subscription, ",",
1341 sizeof(rt->last_subscription));
1342 ff_rdt_subscribe_rule(
1343 rt->last_subscription,
1344 sizeof(rt->last_subscription), i, rule_nr);
1351 av_strlcatf(cmd, sizeof(cmd), "%s\r\n", rt->last_subscription);
1352 rtsp_send_cmd(s, cmd, reply, NULL);
1353 if (reply->status_code != RTSP_STATUS_OK)
1354 return AVERROR_INVALIDDATA;
1355 rt->need_subscription = 0;
1357 if (rt->state == RTSP_STATE_PLAYING)
1362 /* get next frames from the same RTP packet */
1364 if (rt->transport == RTSP_TRANSPORT_RDT)
1365 ret = ff_rdt_parse_packet(rt->cur_tx, pkt, NULL, 0);
1367 ret = rtp_parse_packet(rt->cur_tx, pkt, NULL, 0);
1371 } else if (ret == 1) {
1378 /* read next RTP packet */
1380 switch(rt->lower_transport) {
1382 case RTSP_LOWER_TRANSPORT_TCP:
1383 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1385 case RTSP_LOWER_TRANSPORT_UDP:
1386 case RTSP_LOWER_TRANSPORT_UDP_MULTICAST:
1387 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1388 if (len >=0 && rtsp_st->tx_ctx && rt->transport == RTSP_TRANSPORT_RTP)
1389 rtp_check_and_send_back_rr(rtsp_st->tx_ctx, len);
1394 if (rt->transport == RTSP_TRANSPORT_RDT)
1395 ret = ff_rdt_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1397 ret = rtp_parse_packet(rtsp_st->tx_ctx, pkt, buf, len);
1401 /* more packets may follow, so we save the RTP context */
1402 rt->cur_tx = rtsp_st->tx_ctx;
1407 static int rtsp_read_play(AVFormatContext *s)
1409 RTSPState *rt = s->priv_data;
1410 RTSPHeader reply1, *reply = &reply1;
1413 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1415 if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1416 if (rt->state == RTSP_STATE_PAUSED) {
1417 snprintf(cmd, sizeof(cmd),
1418 "PLAY %s RTSP/1.0\r\n",
1421 snprintf(cmd, sizeof(cmd),
1422 "PLAY %s RTSP/1.0\r\n"
1423 "Range: npt=%0.3f-\r\n",
1425 (double)rt->seek_timestamp / AV_TIME_BASE);
1427 rtsp_send_cmd(s, cmd, reply, NULL);
1428 if (reply->status_code != RTSP_STATUS_OK) {
1432 rt->state = RTSP_STATE_PLAYING;
1436 /* pause the stream */
1437 static int rtsp_read_pause(AVFormatContext *s)
1439 RTSPState *rt = s->priv_data;
1440 RTSPHeader reply1, *reply = &reply1;
1445 if (rt->state != RTSP_STATE_PLAYING)
1447 else if (!(rt->server_type == RTSP_SERVER_REAL && rt->need_subscription)) {
1448 snprintf(cmd, sizeof(cmd),
1449 "PAUSE %s RTSP/1.0\r\n",
1451 rtsp_send_cmd(s, cmd, reply, NULL);
1452 if (reply->status_code != RTSP_STATUS_OK) {
1456 rt->state = RTSP_STATE_PAUSED;
1460 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1461 int64_t timestamp, int flags)
1463 RTSPState *rt = s->priv_data;
1465 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1468 case RTSP_STATE_IDLE:
1470 case RTSP_STATE_PLAYING:
1471 if (rtsp_read_play(s) != 0)
1474 case RTSP_STATE_PAUSED:
1475 rt->state = RTSP_STATE_IDLE;
1481 static int rtsp_read_close(AVFormatContext *s)
1483 RTSPState *rt = s->priv_data;
1484 RTSPHeader reply1, *reply = &reply1;
1488 /* NOTE: it is valid to flush the buffer here */
1489 if (rt->lower_transport == RTSP_LOWER_TRANSPORT_TCP) {
1490 url_fclose(&rt->rtsp_gb);
1493 snprintf(cmd, sizeof(cmd),
1494 "TEARDOWN %s RTSP/1.0\r\n",
1496 rtsp_send_cmd(s, cmd, reply, NULL);
1498 rtsp_close_streams(rt);
1499 url_close(rt->rtsp_hd);
1503 #ifdef CONFIG_RTSP_DEMUXER
1504 AVInputFormat rtsp_demuxer = {
1506 NULL_IF_CONFIG_SMALL("RTSP input format"),
1513 .flags = AVFMT_NOFILE,
1514 .read_play = rtsp_read_play,
1515 .read_pause = rtsp_read_pause,
1519 static int sdp_probe(AVProbeData *p1)
1521 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1523 /* we look for a line beginning "c=IN IP4" */
1524 while (p < p_end && *p != '\0') {
1525 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1526 return AVPROBE_SCORE_MAX / 2;
1528 while(p < p_end - 1 && *p != '\n') p++;
1537 #define SDP_MAX_SIZE 8192
1539 static int sdp_read_header(AVFormatContext *s,
1540 AVFormatParameters *ap)
1542 RTSPState *rt = s->priv_data;
1543 RTSPStream *rtsp_st;
1548 /* read the whole sdp file */
1549 /* XXX: better loading */
1550 content = av_malloc(SDP_MAX_SIZE);
1551 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1554 return AVERROR_INVALIDDATA;
1556 content[size] ='\0';
1558 sdp_parse(s, content);
1561 /* open each RTP stream */
1562 for(i=0;i<rt->nb_rtsp_streams;i++) {
1563 rtsp_st = rt->rtsp_streams[i];
1565 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1566 inet_ntoa(rtsp_st->sdp_ip),
1570 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1571 err = AVERROR_INVALIDDATA;
1574 if ((err = rtsp_open_transport_ctx(s, rtsp_st)))
1579 rtsp_close_streams(rt);
1583 static int sdp_read_packet(AVFormatContext *s,
1586 return rtsp_read_packet(s, pkt);
1589 static int sdp_read_close(AVFormatContext *s)
1591 RTSPState *rt = s->priv_data;
1592 rtsp_close_streams(rt);
1596 #ifdef CONFIG_SDP_DEMUXER
1597 AVInputFormat sdp_demuxer = {
1599 NULL_IF_CONFIG_SMALL("SDP"),
1608 #ifdef CONFIG_REDIR_DEMUXER
1609 /* dummy redirector format (used directly in av_open_input_file now) */
1610 static int redir_probe(AVProbeData *pd)
1614 while (redir_isspace(*p))
1616 if (av_strstart(p, "http://", NULL) ||
1617 av_strstart(p, "rtsp://", NULL))
1618 return AVPROBE_SCORE_MAX;
1622 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1626 AVFormatContext *ic = NULL;
1627 ByteIOContext *f = s->pb;
1629 /* parse each URL and try to open it */
1631 while (c != URL_EOF) {
1634 if (!redir_isspace(c))
1643 if (c == URL_EOF || redir_isspace(c))
1645 if ((q - buf) < sizeof(buf) - 1)
1650 //printf("URL='%s'\n", buf);
1651 /* try to open the media file */
1652 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1656 return AVERROR(EIO);
1664 AVInputFormat redir_demuxer = {
1666 NULL_IF_CONFIG_SMALL("Redirector format"),