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 #include <unistd.h> /* for select() prototype */
34 #include "rtp_internal.h"
37 //#define DEBUG_RTP_TCP
39 enum RTSPClientState {
45 typedef struct RTSPState {
46 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
48 struct RTSPStream **rtsp_streams;
50 enum RTSPClientState state;
51 int64_t seek_timestamp;
53 /* XXX: currently we use unbuffered input */
54 // ByteIOContext rtsp_gb;
55 int seq; /* RTSP command sequence number */
57 enum RTSPProtocol protocol;
58 char last_reply[2048]; /* XXX: allocate ? */
59 RTPDemuxContext *cur_rtp;
62 typedef struct RTSPStream {
63 URLContext *rtp_handle; /* RTP stream handle */
64 RTPDemuxContext *rtp_ctx; /* RTP parse context */
66 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
67 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
68 char control_url[1024]; /* url for this stream (from SDP) */
70 int sdp_port; /* port (from SDP content - not used in RTSP) */
71 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
72 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
73 int sdp_payload_type; /* payload type - only used in SDP */
74 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
76 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
77 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
80 static int rtsp_read_play(AVFormatContext *s);
82 /* XXX: currently, the only way to change the protocols consists in
83 changing this variable */
85 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
86 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
89 static int rtsp_probe(AVProbeData *p)
91 if (av_strstart(p->filename, "rtsp:", NULL))
92 return AVPROBE_SCORE_MAX;
96 static int redir_isspace(int c)
98 return c == ' ' || c == '\t' || c == '\n' || c == '\r';
101 static void skip_spaces(const char **pp)
105 while (redir_isspace(*p))
110 static void get_word_sep(char *buf, int buf_size, const char *sep,
121 while (!strchr(sep, *p) && *p != '\0') {
122 if ((q - buf) < buf_size - 1)
131 static void get_word(char *buf, int buf_size, const char **pp)
139 while (!redir_isspace(*p) && *p != '\0') {
140 if ((q - buf) < buf_size - 1)
149 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
151 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
158 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
159 see if we can handle this kind of payload */
160 get_word_sep(buf, sizeof(buf), "/", &p);
161 if (payload_type >= RTP_PT_PRIVATE) {
162 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
164 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
165 codec->codec_id = handler->codec_id;
166 rtsp_st->dynamic_handler= handler;
168 rtsp_st->dynamic_protocol_context= handler->open();
172 handler= handler->next;
175 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
176 /* search into AVRtpPayloadTypes[] */
177 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
180 c = avcodec_find_decoder(codec->codec_id);
184 c_name = (char *)NULL;
187 get_word_sep(buf, sizeof(buf), "/", &p);
189 switch (codec->codec_type) {
190 case CODEC_TYPE_AUDIO:
191 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
192 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
193 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
195 codec->sample_rate = i;
196 get_word_sep(buf, sizeof(buf), "/", &p);
200 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
201 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
203 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
204 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
206 case CODEC_TYPE_VIDEO:
207 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
218 /* return the length and optionnaly the data */
219 static int hex_to_data(uint8_t *data, const char *p)
229 c = toupper((unsigned char)*p++);
230 if (c >= '0' && c <= '9')
232 else if (c >= 'A' && c <= 'F')
247 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
249 switch (codec->codec_id) {
252 if (!strcmp(attr, "config")) {
253 /* decode the hexa encoded parameter */
254 int len = hex_to_data(NULL, value);
255 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
256 if (!codec->extradata)
258 codec->extradata_size = len;
259 hex_to_data(codec->extradata, value);
268 typedef struct attrname_map
275 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
276 #define ATTR_NAME_TYPE_INT 0
277 #define ATTR_NAME_TYPE_STR 1
278 static attrname_map_t attr_names[]=
280 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
281 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
282 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
283 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
284 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
285 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
289 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
290 * because it is used in rtp_h264.c, which is forthcoming.
292 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
297 get_word_sep(attr, attr_size, "=", p);
300 get_word_sep(value, value_size, ";", p);
308 /* parse a SDP line and save stream attributes */
309 static void sdp_parse_fmtp(AVStream *st, const char *p)
315 RTSPStream *rtsp_st = st->priv_data;
316 AVCodecContext *codec = st->codec;
317 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
319 /* loop on each attribute */
320 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
322 /* grab the codec extra_data from the config parameter of the fmtp line */
323 sdp_parse_fmtp_config(codec, attr, value);
324 /* Looking for a known attribute */
325 for (i = 0; attr_names[i].str; ++i) {
326 if (!strcasecmp(attr, attr_names[i].str)) {
327 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
328 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
329 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
330 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
336 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
338 * Used for seeking in the rtp stream.
340 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
345 if (!av_stristart(p, "npt=", &p))
348 *start = AV_NOPTS_VALUE;
349 *end = AV_NOPTS_VALUE;
351 get_word_sep(buf, sizeof(buf), "-", &p);
352 *start = parse_date(buf, 1);
355 get_word_sep(buf, sizeof(buf), "-", &p);
356 *end = parse_date(buf, 1);
358 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
359 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
362 typedef struct SDPParseState {
364 struct in_addr default_ip;
368 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
369 int letter, const char *buf)
371 RTSPState *rt = s->priv_data;
372 char buf1[64], st_type[64];
374 int codec_type, payload_type, i;
377 struct in_addr sdp_ip;
381 printf("sdp: %c='%s'\n", letter, buf);
387 get_word(buf1, sizeof(buf1), &p);
388 if (strcmp(buf1, "IN") != 0)
390 get_word(buf1, sizeof(buf1), &p);
391 if (strcmp(buf1, "IP4") != 0)
393 get_word_sep(buf1, sizeof(buf1), "/", &p);
394 if (inet_aton(buf1, &sdp_ip) == 0)
399 get_word_sep(buf1, sizeof(buf1), "/", &p);
402 if (s->nb_streams == 0) {
403 s1->default_ip = sdp_ip;
404 s1->default_ttl = ttl;
406 st = s->streams[s->nb_streams - 1];
407 rtsp_st = st->priv_data;
408 rtsp_st->sdp_ip = sdp_ip;
409 rtsp_st->sdp_ttl = ttl;
413 av_strlcpy(s->title, p, sizeof(s->title));
416 if (s->nb_streams == 0) {
417 av_strlcpy(s->comment, p, sizeof(s->comment));
423 get_word(st_type, sizeof(st_type), &p);
424 if (!strcmp(st_type, "audio")) {
425 codec_type = CODEC_TYPE_AUDIO;
426 } else if (!strcmp(st_type, "video")) {
427 codec_type = CODEC_TYPE_VIDEO;
431 rtsp_st = av_mallocz(sizeof(RTSPStream));
434 rtsp_st->stream_index = -1;
435 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
437 rtsp_st->sdp_ip = s1->default_ip;
438 rtsp_st->sdp_ttl = s1->default_ttl;
440 get_word(buf1, sizeof(buf1), &p); /* port */
441 rtsp_st->sdp_port = atoi(buf1);
443 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
445 /* XXX: handle list of formats */
446 get_word(buf1, sizeof(buf1), &p); /* format list */
447 rtsp_st->sdp_payload_type = atoi(buf1);
449 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
450 /* no corresponding stream */
452 st = av_new_stream(s, 0);
455 st->priv_data = rtsp_st;
456 rtsp_st->stream_index = st->index;
457 st->codec->codec_type = codec_type;
458 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
459 /* if standard payload type, we can find the codec right now */
460 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
463 /* put a default control url */
464 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
467 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
469 /* get the control url */
470 st = s->streams[s->nb_streams - 1];
471 rtsp_st = st->priv_data;
473 /* XXX: may need to add full url resolution */
474 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
475 if (proto[0] == '\0') {
476 /* relative control URL */
477 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
478 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
480 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
482 } else if (av_strstart(p, "rtpmap:", &p)) {
483 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
484 get_word(buf1, sizeof(buf1), &p);
485 payload_type = atoi(buf1);
486 for(i = 0; i < s->nb_streams;i++) {
488 rtsp_st = st->priv_data;
489 if (rtsp_st->sdp_payload_type == payload_type) {
490 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
493 } else if (av_strstart(p, "fmtp:", &p)) {
494 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
495 get_word(buf1, sizeof(buf1), &p);
496 payload_type = atoi(buf1);
497 for(i = 0; i < s->nb_streams;i++) {
499 rtsp_st = st->priv_data;
500 if (rtsp_st->sdp_payload_type == payload_type) {
501 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
502 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
503 sdp_parse_fmtp(st, p);
506 sdp_parse_fmtp(st, p);
510 } else if(av_strstart(p, "framesize:", &p)) {
511 // let dynamic protocol handlers have a stab at the line.
512 get_word(buf1, sizeof(buf1), &p);
513 payload_type = atoi(buf1);
514 for(i = 0; i < s->nb_streams;i++) {
516 rtsp_st = st->priv_data;
517 if (rtsp_st->sdp_payload_type == payload_type) {
518 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
519 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
523 } else if(av_strstart(p, "range:", &p)) {
526 // this is so that seeking on a streamed file can work.
527 rtsp_parse_range_npt(p, &start, &end);
528 s->start_time= start;
529 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
530 } else if (s->nb_streams > 0) {
531 rtsp_st = s->streams[s->nb_streams - 1]->priv_data;
532 if (rtsp_st->dynamic_handler &&
533 rtsp_st->dynamic_handler->parse_sdp_a_line)
534 rtsp_st->dynamic_handler->parse_sdp_a_line(s->streams[s->nb_streams - 1],
535 rtsp_st->dynamic_protocol_context, buf);
541 static int sdp_parse(AVFormatContext *s, const char *content)
546 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
548 memset(s1, 0, sizeof(SDPParseState));
559 /* get the content */
561 while (*p != '\n' && *p != '\r' && *p != '\0') {
562 if ((q - buf) < sizeof(buf) - 1)
567 sdp_parse_line(s, s1, letter, buf);
569 while (*p != '\n' && *p != '\0')
577 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
584 v = strtol(p, (char **)&p, 10);
588 v = strtol(p, (char **)&p, 10);
597 /* XXX: only one transport specification is parsed */
598 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
600 char transport_protocol[16];
602 char lower_transport[16];
604 RTSPTransportField *th;
607 reply->nb_transports = 0;
614 th = &reply->transports[reply->nb_transports];
616 get_word_sep(transport_protocol, sizeof(transport_protocol),
620 if (!strcasecmp (transport_protocol, "rtp")) {
621 get_word_sep(profile, sizeof(profile), "/;,", &p);
622 lower_transport[0] = '\0';
623 /* rtp/avp/<protocol> */
626 get_word_sep(lower_transport, sizeof(lower_transport),
629 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
630 /* x-pn-tng/<protocol> */
631 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
634 if (!strcasecmp(lower_transport, "TCP"))
635 th->protocol = RTSP_PROTOCOL_RTP_TCP;
637 th->protocol = RTSP_PROTOCOL_RTP_UDP;
641 /* get each parameter */
642 while (*p != '\0' && *p != ',') {
643 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
644 if (!strcmp(parameter, "port")) {
647 rtsp_parse_range(&th->port_min, &th->port_max, &p);
649 } else if (!strcmp(parameter, "client_port")) {
652 rtsp_parse_range(&th->client_port_min,
653 &th->client_port_max, &p);
655 } else if (!strcmp(parameter, "server_port")) {
658 rtsp_parse_range(&th->server_port_min,
659 &th->server_port_max, &p);
661 } else if (!strcmp(parameter, "interleaved")) {
664 rtsp_parse_range(&th->interleaved_min,
665 &th->interleaved_max, &p);
667 } else if (!strcmp(parameter, "multicast")) {
668 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
669 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
670 } else if (!strcmp(parameter, "ttl")) {
673 th->ttl = strtol(p, (char **)&p, 10);
675 } else if (!strcmp(parameter, "destination")) {
676 struct in_addr ipaddr;
680 get_word_sep(buf, sizeof(buf), ";,", &p);
681 if (inet_aton(buf, &ipaddr))
682 th->destination = ntohl(ipaddr.s_addr);
685 while (*p != ';' && *p != '\0' && *p != ',')
693 reply->nb_transports++;
697 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
701 /* NOTE: we do case independent match for broken servers */
703 if (av_stristart(p, "Session:", &p)) {
704 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
705 } else if (av_stristart(p, "Content-Length:", &p)) {
706 reply->content_length = strtol(p, NULL, 10);
707 } else if (av_stristart(p, "Transport:", &p)) {
708 rtsp_parse_transport(reply, p);
709 } else if (av_stristart(p, "CSeq:", &p)) {
710 reply->seq = strtol(p, NULL, 10);
711 } else if (av_stristart(p, "Range:", &p)) {
712 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
716 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
722 ret = url_read(h, buf+len, size-len);
730 /* skip a RTP/TCP interleaved packet */
731 static void rtsp_skip_packet(AVFormatContext *s)
733 RTSPState *rt = s->priv_data;
737 ret = url_readbuf(rt->rtsp_hd, buf, 3);
740 len = AV_RB16(buf + 1);
742 printf("skipping RTP packet len=%d\n", len);
747 if (len1 > sizeof(buf))
749 ret = url_readbuf(rt->rtsp_hd, buf, len1);
756 static void rtsp_send_cmd(AVFormatContext *s,
757 const char *cmd, RTSPHeader *reply,
758 unsigned char **content_ptr)
760 RTSPState *rt = s->priv_data;
761 char buf[4096], buf1[1024], *q;
764 int content_length, line_count;
765 unsigned char *content = NULL;
767 memset(reply, 0, sizeof(RTSPHeader));
770 av_strlcpy(buf, cmd, sizeof(buf));
771 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
772 av_strlcat(buf, buf1, sizeof(buf));
773 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
774 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
775 av_strlcat(buf, buf1, sizeof(buf));
777 av_strlcat(buf, "\r\n", sizeof(buf));
779 printf("Sending:\n%s--\n", buf);
781 url_write(rt->rtsp_hd, buf, strlen(buf));
783 /* parse reply (XXX: use buffers) */
785 rt->last_reply[0] = '\0';
789 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
794 /* XXX: only parse it if first char on line ? */
796 } else if (ch != '\r') {
797 if ((q - buf) < sizeof(buf) - 1)
803 printf("line='%s'\n", buf);
805 /* test if last line */
809 if (line_count == 0) {
811 get_word(buf1, sizeof(buf1), &p);
812 get_word(buf1, sizeof(buf1), &p);
813 reply->status_code = atoi(buf1);
815 rtsp_parse_line(reply, p);
816 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
817 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
822 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
823 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
825 content_length = reply->content_length;
826 if (content_length > 0) {
827 /* leave some room for a trailing '\0' (useful for simple parsing) */
828 content = av_malloc(content_length + 1);
829 (void)url_readbuf(rt->rtsp_hd, content, content_length);
830 content[content_length] = '\0';
833 *content_ptr = content;
839 /* close and free RTSP streams */
840 static void rtsp_close_streams(RTSPState *rt)
845 for(i=0;i<rt->nb_rtsp_streams;i++) {
846 rtsp_st = rt->rtsp_streams[i];
848 if (rtsp_st->rtp_ctx)
849 rtp_parse_close(rtsp_st->rtp_ctx);
850 if (rtsp_st->rtp_handle)
851 url_close(rtsp_st->rtp_handle);
852 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
853 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
856 av_free(rt->rtsp_streams);
860 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
863 make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
865 RTSPState *rt = s->priv_data;
869 RTSPHeader reply1, *reply = &reply1;
872 /* for each stream, make the setup request */
873 /* XXX: we assume the same server is used for the control of each
876 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
877 char transport[2048];
879 rtsp_st = rt->rtsp_streams[i];
881 /* compute available transports */
885 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
888 /* first try in specified port range */
889 if (RTSP_RTP_PORT_MIN != 0) {
890 while(j <= RTSP_RTP_PORT_MAX) {
891 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
892 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
893 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
899 /* then try on any port
900 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
901 ** err = AVERROR_INVALIDDATA;
907 port = rtp_get_local_port(rtsp_st->rtp_handle);
908 if (transport[0] != '\0')
909 av_strlcat(transport, ",", sizeof(transport));
910 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
911 "RTP/AVP/UDP;unicast;client_port=%d-%d",
916 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
917 if (transport[0] != '\0')
918 av_strlcat(transport, ",", sizeof(transport));
919 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
923 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
924 if (transport[0] != '\0')
925 av_strlcat(transport, ",", sizeof(transport));
926 snprintf(transport + strlen(transport),
927 sizeof(transport) - strlen(transport) - 1,
928 "RTP/AVP/UDP;multicast");
930 snprintf(cmd, sizeof(cmd),
931 "SETUP %s RTSP/1.0\r\n"
933 rtsp_st->control_url, transport);
934 rtsp_send_cmd(s, cmd, reply, NULL);
935 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
938 } else if (reply->status_code != RTSP_STATUS_OK ||
939 reply->nb_transports != 1) {
940 err = AVERROR_INVALIDDATA;
944 /* XXX: same protocol for all streams is required */
946 if (reply->transports[0].protocol != rt->protocol) {
947 err = AVERROR_INVALIDDATA;
951 rt->protocol = reply->transports[0].protocol;
954 /* close RTP connection if not choosen */
955 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
956 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
957 url_close(rtsp_st->rtp_handle);
958 rtsp_st->rtp_handle = NULL;
961 switch(reply->transports[0].protocol) {
962 case RTSP_PROTOCOL_RTP_TCP:
963 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
964 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
967 case RTSP_PROTOCOL_RTP_UDP:
971 /* XXX: also use address if specified */
972 snprintf(url, sizeof(url), "rtp://%s:%d",
973 host, reply->transports[0].server_port_min);
974 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
975 err = AVERROR_INVALIDDATA;
980 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
985 in.s_addr = htonl(reply->transports[0].destination);
986 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
988 reply->transports[0].port_min,
989 reply->transports[0].ttl);
990 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
991 err = AVERROR_INVALIDDATA;
997 /* open the RTP context */
999 if (rtsp_st->stream_index >= 0)
1000 st = s->streams[rtsp_st->stream_index];
1002 s->ctx_flags |= AVFMTCTX_NOHEADER;
1003 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1005 if (!rtsp_st->rtp_ctx) {
1006 err = AVERROR(ENOMEM);
1009 if(rtsp_st->dynamic_handler) {
1010 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1011 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1019 for (i=0; i<rt->nb_rtsp_streams; i++) {
1020 if (rt->rtsp_streams[i]->rtp_handle) {
1021 url_close(rt->rtsp_streams[i]->rtp_handle);
1022 rt->rtsp_streams[i]->rtp_handle = NULL;
1028 static int rtsp_read_header(AVFormatContext *s,
1029 AVFormatParameters *ap)
1031 RTSPState *rt = s->priv_data;
1032 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1033 URLContext *rtsp_hd;
1035 RTSPHeader reply1, *reply = &reply1;
1036 unsigned char *content = NULL;
1037 int protocol_mask = 0;
1039 /* extract hostname and port */
1040 url_split(NULL, 0, NULL, 0,
1041 host, sizeof(host), &port, path, sizeof(path), s->filename);
1043 port = RTSP_DEFAULT_PORT;
1045 /* search for options */
1046 option_list = strchr(path, '?');
1048 /* remove the options from the path */
1050 while(option_list) {
1051 /* move the option pointer */
1052 option = option_list;
1053 option_list = strchr(option_list, '&');
1055 *(option_list++) = 0;
1056 /* handle the options */
1057 if (strcmp(option, "udp") == 0)
1058 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1059 else if (strcmp(option, "multicast") == 0)
1060 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1061 else if (strcmp(option, "tcp") == 0)
1062 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1067 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
1069 /* open the tcp connexion */
1070 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1071 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1072 return AVERROR(EIO);
1073 rt->rtsp_hd = rtsp_hd;
1076 /* describe the stream */
1077 snprintf(cmd, sizeof(cmd),
1078 "DESCRIBE %s RTSP/1.0\r\n"
1079 "Accept: application/sdp\r\n",
1081 rtsp_send_cmd(s, cmd, reply, &content);
1083 err = AVERROR_INVALIDDATA;
1086 if (reply->status_code != RTSP_STATUS_OK) {
1087 err = AVERROR_INVALIDDATA;
1091 /* now we got the SDP description, we parse it */
1092 ret = sdp_parse(s, (const char *)content);
1095 err = AVERROR_INVALIDDATA;
1100 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
1102 err = make_setup_request(s, host, port, protocol);
1105 protocol_mask &= ~(1 << protocol);
1106 if (protocol_mask == 0 && err == 1) {
1107 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1112 rt->state = RTSP_STATE_IDLE;
1113 rt->seek_timestamp = 0; /* default is to start stream at position
1115 if (ap->initial_pause) {
1116 /* do not start immediately */
1118 if (rtsp_read_play(s) < 0) {
1119 err = AVERROR_INVALIDDATA;
1125 rtsp_close_streams(rt);
1127 url_close(rt->rtsp_hd);
1131 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1132 uint8_t *buf, int buf_size)
1134 RTSPState *rt = s->priv_data;
1135 int id, len, i, ret;
1136 RTSPStream *rtsp_st;
1138 #ifdef DEBUG_RTP_TCP
1139 printf("tcp_read_packet:\n");
1143 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1144 #ifdef DEBUG_RTP_TCP
1145 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1152 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1156 len = AV_RB16(buf + 1);
1157 #ifdef DEBUG_RTP_TCP
1158 printf("id=%d len=%d\n", id, len);
1160 if (len > buf_size || len < 12)
1163 ret = url_readbuf(rt->rtsp_hd, buf, len);
1167 /* find the matching stream */
1168 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1169 rtsp_st = rt->rtsp_streams[i];
1170 if (id >= rtsp_st->interleaved_min &&
1171 id <= rtsp_st->interleaved_max)
1176 *prtsp_st = rtsp_st;
1180 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1181 uint8_t *buf, int buf_size)
1183 RTSPState *rt = s->priv_data;
1184 RTSPStream *rtsp_st;
1186 int fd1, fd2, fd_max, n, i, ret;
1190 if (url_interrupt_cb())
1191 return AVERROR(EINTR);
1194 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1195 rtsp_st = rt->rtsp_streams[i];
1196 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1197 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1203 tv.tv_usec = 100 * 1000;
1204 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1206 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1207 rtsp_st = rt->rtsp_streams[i];
1208 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1209 if (FD_ISSET(fd1, &rfds)) {
1210 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1212 *prtsp_st = rtsp_st;
1221 static int rtsp_read_packet(AVFormatContext *s,
1224 RTSPState *rt = s->priv_data;
1225 RTSPStream *rtsp_st;
1227 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1229 /* get next frames from the same RTP packet */
1231 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1235 } else if (ret == 1) {
1242 /* read next RTP packet */
1244 switch(rt->protocol) {
1246 case RTSP_PROTOCOL_RTP_TCP:
1247 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1249 case RTSP_PROTOCOL_RTP_UDP:
1250 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1251 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1252 if (len >=0 && rtsp_st->rtp_ctx)
1253 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1258 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1262 /* more packets may follow, so we save the RTP context */
1263 rt->cur_rtp = rtsp_st->rtp_ctx;
1268 static int rtsp_read_play(AVFormatContext *s)
1270 RTSPState *rt = s->priv_data;
1271 RTSPHeader reply1, *reply = &reply1;
1274 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1276 if (rt->state == RTSP_STATE_PAUSED) {
1277 snprintf(cmd, sizeof(cmd),
1278 "PLAY %s RTSP/1.0\r\n",
1281 snprintf(cmd, sizeof(cmd),
1282 "PLAY %s RTSP/1.0\r\n"
1283 "Range: npt=%0.3f-\r\n",
1285 (double)rt->seek_timestamp / AV_TIME_BASE);
1287 rtsp_send_cmd(s, cmd, reply, NULL);
1288 if (reply->status_code != RTSP_STATUS_OK) {
1291 rt->state = RTSP_STATE_PLAYING;
1296 /* pause the stream */
1297 static int rtsp_read_pause(AVFormatContext *s)
1299 RTSPState *rt = s->priv_data;
1300 RTSPHeader reply1, *reply = &reply1;
1305 if (rt->state != RTSP_STATE_PLAYING)
1308 snprintf(cmd, sizeof(cmd),
1309 "PAUSE %s RTSP/1.0\r\n",
1311 rtsp_send_cmd(s, cmd, reply, NULL);
1312 if (reply->status_code != RTSP_STATUS_OK) {
1315 rt->state = RTSP_STATE_PAUSED;
1320 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1321 int64_t timestamp, int flags)
1323 RTSPState *rt = s->priv_data;
1325 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1328 case RTSP_STATE_IDLE:
1330 case RTSP_STATE_PLAYING:
1331 if (rtsp_read_play(s) != 0)
1334 case RTSP_STATE_PAUSED:
1335 rt->state = RTSP_STATE_IDLE;
1341 static int rtsp_read_close(AVFormatContext *s)
1343 RTSPState *rt = s->priv_data;
1344 RTSPHeader reply1, *reply = &reply1;
1348 /* NOTE: it is valid to flush the buffer here */
1349 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1350 url_fclose(&rt->rtsp_gb);
1353 snprintf(cmd, sizeof(cmd),
1354 "TEARDOWN %s RTSP/1.0\r\n",
1356 rtsp_send_cmd(s, cmd, reply, NULL);
1358 rtsp_close_streams(rt);
1359 url_close(rt->rtsp_hd);
1363 #ifdef CONFIG_RTSP_DEMUXER
1364 AVInputFormat rtsp_demuxer = {
1366 NULL_IF_CONFIG_SMALL("RTSP input format"),
1373 .flags = AVFMT_NOFILE,
1374 .read_play = rtsp_read_play,
1375 .read_pause = rtsp_read_pause,
1379 static int sdp_probe(AVProbeData *p1)
1381 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1383 /* we look for a line beginning "c=IN IP4" */
1384 while (p < p_end && *p != '\0') {
1385 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1386 return AVPROBE_SCORE_MAX / 2;
1388 while(p < p_end - 1 && *p != '\n') p++;
1397 #define SDP_MAX_SIZE 8192
1399 static int sdp_read_header(AVFormatContext *s,
1400 AVFormatParameters *ap)
1402 RTSPState *rt = s->priv_data;
1403 RTSPStream *rtsp_st;
1409 /* read the whole sdp file */
1410 /* XXX: better loading */
1411 content = av_malloc(SDP_MAX_SIZE);
1412 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1415 return AVERROR_INVALIDDATA;
1417 content[size] ='\0';
1419 sdp_parse(s, content);
1422 /* open each RTP stream */
1423 for(i=0;i<rt->nb_rtsp_streams;i++) {
1424 rtsp_st = rt->rtsp_streams[i];
1426 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1427 inet_ntoa(rtsp_st->sdp_ip),
1431 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1432 err = AVERROR_INVALIDDATA;
1435 /* open the RTP context */
1437 if (rtsp_st->stream_index >= 0)
1438 st = s->streams[rtsp_st->stream_index];
1440 s->ctx_flags |= AVFMTCTX_NOHEADER;
1441 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1442 if (!rtsp_st->rtp_ctx) {
1443 err = AVERROR(ENOMEM);
1446 if(rtsp_st->dynamic_handler) {
1447 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1448 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1454 rtsp_close_streams(rt);
1458 static int sdp_read_packet(AVFormatContext *s,
1461 return rtsp_read_packet(s, pkt);
1464 static int sdp_read_close(AVFormatContext *s)
1466 RTSPState *rt = s->priv_data;
1467 rtsp_close_streams(rt);
1471 #ifdef CONFIG_SDP_DEMUXER
1472 AVInputFormat sdp_demuxer = {
1474 NULL_IF_CONFIG_SMALL("SDP"),
1483 #ifdef CONFIG_REDIR_DEMUXER
1484 /* dummy redirector format (used directly in av_open_input_file now) */
1485 static int redir_probe(AVProbeData *pd)
1489 while (redir_isspace(*p))
1491 if (av_strstart(p, "http://", NULL) ||
1492 av_strstart(p, "rtsp://", NULL))
1493 return AVPROBE_SCORE_MAX;
1497 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1501 AVFormatContext *ic = NULL;
1502 ByteIOContext *f = s->pb;
1504 /* parse each URL and try to open it */
1506 while (c != URL_EOF) {
1509 if (!redir_isspace(c))
1518 if (c == URL_EOF || redir_isspace(c))
1520 if ((q - buf) < sizeof(buf) - 1)
1525 //printf("URL='%s'\n", buf);
1526 /* try to open the media file */
1527 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1531 return AVERROR(EIO);
1539 AVInputFormat redir_demuxer = {
1541 NULL_IF_CONFIG_SMALL("Redirector format"),