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
24 #include <unistd.h> /* for select() prototype */
29 #include "rtp_internal.h"
32 //#define DEBUG_RTP_TCP
34 enum RTSPClientState {
40 typedef struct RTSPState {
41 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
43 struct RTSPStream **rtsp_streams;
45 enum RTSPClientState state;
46 int64_t seek_timestamp;
48 /* XXX: currently we use unbuffered input */
49 // ByteIOContext rtsp_gb;
50 int seq; /* RTSP command sequence number */
52 enum RTSPProtocol protocol;
53 char last_reply[2048]; /* XXX: allocate ? */
54 RTPDemuxContext *cur_rtp;
57 typedef struct RTSPStream {
58 URLContext *rtp_handle; /* RTP stream handle */
59 RTPDemuxContext *rtp_ctx; /* RTP parse context */
61 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
62 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
63 char control_url[1024]; /* url for this stream (from SDP) */
65 int sdp_port; /* port (from SDP content - not used in RTSP) */
66 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
67 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
68 int sdp_payload_type; /* payload type - only used in SDP */
69 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
71 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
72 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
75 static int rtsp_read_play(AVFormatContext *s);
77 /* XXX: currently, the only way to change the protocols consists in
78 changing this variable */
80 #if LIBAVFORMAT_VERSION_INT < (53 << 16)
81 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
84 static int rtsp_probe(AVProbeData *p)
86 if (av_strstart(p->filename, "rtsp:", NULL))
87 return AVPROBE_SCORE_MAX;
91 static int redir_isspace(int c)
93 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
96 static void skip_spaces(const char **pp)
100 while (redir_isspace(*p))
105 static void get_word_sep(char *buf, int buf_size, const char *sep,
116 while (!strchr(sep, *p) && *p != '\0') {
117 if ((q - buf) < buf_size - 1)
126 static void get_word(char *buf, int buf_size, const char **pp)
134 while (!redir_isspace(*p) && *p != '\0') {
135 if ((q - buf) < buf_size - 1)
144 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
146 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
153 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
154 see if we can handle this kind of payload */
155 get_word_sep(buf, sizeof(buf), "/", &p);
156 if (payload_type >= RTP_PT_PRIVATE) {
157 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
159 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
160 codec->codec_id = handler->codec_id;
161 rtsp_st->dynamic_handler= handler;
163 rtsp_st->dynamic_protocol_context= handler->open();
167 handler= handler->next;
170 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
171 /* search into AVRtpPayloadTypes[] */
172 codec->codec_id = ff_rtp_codec_id(buf, codec->codec_type);
175 c = avcodec_find_decoder(codec->codec_id);
179 c_name = (char *)NULL;
182 get_word_sep(buf, sizeof(buf), "/", &p);
184 switch (codec->codec_type) {
185 case CODEC_TYPE_AUDIO:
186 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
187 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
188 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
190 codec->sample_rate = i;
191 get_word_sep(buf, sizeof(buf), "/", &p);
195 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
196 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
198 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
199 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
201 case CODEC_TYPE_VIDEO:
202 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
213 /* return the length and optionnaly the data */
214 static int hex_to_data(uint8_t *data, const char *p)
224 c = toupper((unsigned char)*p++);
225 if (c >= '0' && c <= '9')
227 else if (c >= 'A' && c <= 'F')
242 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
244 switch (codec->codec_id) {
247 if (!strcmp(attr, "config")) {
248 /* decode the hexa encoded parameter */
249 int len = hex_to_data(NULL, value);
250 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
251 if (!codec->extradata)
253 codec->extradata_size = len;
254 hex_to_data(codec->extradata, value);
263 typedef struct attrname_map
270 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
271 #define ATTR_NAME_TYPE_INT 0
272 #define ATTR_NAME_TYPE_STR 1
273 static attrname_map_t attr_names[]=
275 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
276 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
277 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
278 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
279 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
280 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
284 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
285 * because it is used in rtp_h264.c, which is forthcoming.
287 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
292 get_word_sep(attr, attr_size, "=", p);
295 get_word_sep(value, value_size, ";", p);
303 /* parse a SDP line and save stream attributes */
304 static void sdp_parse_fmtp(AVStream *st, const char *p)
310 RTSPStream *rtsp_st = st->priv_data;
311 AVCodecContext *codec = st->codec;
312 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
314 /* loop on each attribute */
315 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
317 /* grab the codec extra_data from the config parameter of the fmtp line */
318 sdp_parse_fmtp_config(codec, attr, value);
319 /* Looking for a known attribute */
320 for (i = 0; attr_names[i].str; ++i) {
321 if (!strcasecmp(attr, attr_names[i].str)) {
322 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
323 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
324 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
325 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
331 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
333 * Used for seeking in the rtp stream.
335 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
340 if (!av_stristart(p, "npt=", &p))
343 *start = AV_NOPTS_VALUE;
344 *end = AV_NOPTS_VALUE;
346 get_word_sep(buf, sizeof(buf), "-", &p);
347 *start = parse_date(buf, 1);
350 get_word_sep(buf, sizeof(buf), "-", &p);
351 *end = parse_date(buf, 1);
353 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
354 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
357 typedef struct SDPParseState {
359 struct in_addr default_ip;
363 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
364 int letter, const char *buf)
366 RTSPState *rt = s->priv_data;
367 char buf1[64], st_type[64];
369 int codec_type, payload_type, i;
372 struct in_addr sdp_ip;
376 printf("sdp: %c='%s'\n", letter, buf);
382 get_word(buf1, sizeof(buf1), &p);
383 if (strcmp(buf1, "IN") != 0)
385 get_word(buf1, sizeof(buf1), &p);
386 if (strcmp(buf1, "IP4") != 0)
388 get_word_sep(buf1, sizeof(buf1), "/", &p);
389 if (inet_aton(buf1, &sdp_ip) == 0)
394 get_word_sep(buf1, sizeof(buf1), "/", &p);
397 if (s->nb_streams == 0) {
398 s1->default_ip = sdp_ip;
399 s1->default_ttl = ttl;
401 st = s->streams[s->nb_streams - 1];
402 rtsp_st = st->priv_data;
403 rtsp_st->sdp_ip = sdp_ip;
404 rtsp_st->sdp_ttl = ttl;
408 av_strlcpy(s->title, p, sizeof(s->title));
411 if (s->nb_streams == 0) {
412 av_strlcpy(s->comment, p, sizeof(s->comment));
418 get_word(st_type, sizeof(st_type), &p);
419 if (!strcmp(st_type, "audio")) {
420 codec_type = CODEC_TYPE_AUDIO;
421 } else if (!strcmp(st_type, "video")) {
422 codec_type = CODEC_TYPE_VIDEO;
426 rtsp_st = av_mallocz(sizeof(RTSPStream));
429 rtsp_st->stream_index = -1;
430 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
432 rtsp_st->sdp_ip = s1->default_ip;
433 rtsp_st->sdp_ttl = s1->default_ttl;
435 get_word(buf1, sizeof(buf1), &p); /* port */
436 rtsp_st->sdp_port = atoi(buf1);
438 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
440 /* XXX: handle list of formats */
441 get_word(buf1, sizeof(buf1), &p); /* format list */
442 rtsp_st->sdp_payload_type = atoi(buf1);
444 if (!strcmp(ff_rtp_enc_name(rtsp_st->sdp_payload_type), "MP2T")) {
445 /* no corresponding stream */
447 st = av_new_stream(s, 0);
450 st->priv_data = rtsp_st;
451 rtsp_st->stream_index = st->index;
452 st->codec->codec_type = codec_type;
453 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
454 /* if standard payload type, we can find the codec right now */
455 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
458 /* put a default control url */
459 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
462 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
464 /* get the control url */
465 st = s->streams[s->nb_streams - 1];
466 rtsp_st = st->priv_data;
468 /* XXX: may need to add full url resolution */
469 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
470 if (proto[0] == '\0') {
471 /* relative control URL */
472 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
473 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
475 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
477 } else if (av_strstart(p, "rtpmap:", &p)) {
478 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
479 get_word(buf1, sizeof(buf1), &p);
480 payload_type = atoi(buf1);
481 for(i = 0; i < s->nb_streams;i++) {
483 rtsp_st = st->priv_data;
484 if (rtsp_st->sdp_payload_type == payload_type) {
485 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
488 } else if (av_strstart(p, "fmtp:", &p)) {
489 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
490 get_word(buf1, sizeof(buf1), &p);
491 payload_type = atoi(buf1);
492 for(i = 0; i < s->nb_streams;i++) {
494 rtsp_st = st->priv_data;
495 if (rtsp_st->sdp_payload_type == payload_type) {
496 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
497 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
498 sdp_parse_fmtp(st, p);
501 sdp_parse_fmtp(st, p);
505 } else if(av_strstart(p, "framesize:", &p)) {
506 // let dynamic protocol handlers have a stab at the line.
507 get_word(buf1, sizeof(buf1), &p);
508 payload_type = atoi(buf1);
509 for(i = 0; i < s->nb_streams;i++) {
511 rtsp_st = st->priv_data;
512 if (rtsp_st->sdp_payload_type == payload_type) {
513 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
514 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
518 } else if(av_strstart(p, "range:", &p)) {
521 // this is so that seeking on a streamed file can work.
522 rtsp_parse_range_npt(p, &start, &end);
523 s->start_time= start;
524 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
530 static int sdp_parse(AVFormatContext *s, const char *content)
535 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
537 memset(s1, 0, sizeof(SDPParseState));
548 /* get the content */
550 while (*p != '\n' && *p != '\r' && *p != '\0') {
551 if ((q - buf) < sizeof(buf) - 1)
556 sdp_parse_line(s, s1, letter, buf);
558 while (*p != '\n' && *p != '\0')
566 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
573 v = strtol(p, (char **)&p, 10);
577 v = strtol(p, (char **)&p, 10);
586 /* XXX: only one transport specification is parsed */
587 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
589 char transport_protocol[16];
591 char lower_transport[16];
593 RTSPTransportField *th;
596 reply->nb_transports = 0;
603 th = &reply->transports[reply->nb_transports];
605 get_word_sep(transport_protocol, sizeof(transport_protocol),
609 if (!strcasecmp (transport_protocol, "rtp")) {
610 get_word_sep(profile, sizeof(profile), "/;,", &p);
611 lower_transport[0] = '\0';
612 /* rtp/avp/<protocol> */
615 get_word_sep(lower_transport, sizeof(lower_transport),
618 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
619 /* x-pn-tng/<protocol> */
620 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
623 if (!strcasecmp(lower_transport, "TCP"))
624 th->protocol = RTSP_PROTOCOL_RTP_TCP;
626 th->protocol = RTSP_PROTOCOL_RTP_UDP;
630 /* get each parameter */
631 while (*p != '\0' && *p != ',') {
632 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
633 if (!strcmp(parameter, "port")) {
636 rtsp_parse_range(&th->port_min, &th->port_max, &p);
638 } else if (!strcmp(parameter, "client_port")) {
641 rtsp_parse_range(&th->client_port_min,
642 &th->client_port_max, &p);
644 } else if (!strcmp(parameter, "server_port")) {
647 rtsp_parse_range(&th->server_port_min,
648 &th->server_port_max, &p);
650 } else if (!strcmp(parameter, "interleaved")) {
653 rtsp_parse_range(&th->interleaved_min,
654 &th->interleaved_max, &p);
656 } else if (!strcmp(parameter, "multicast")) {
657 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
658 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
659 } else if (!strcmp(parameter, "ttl")) {
662 th->ttl = strtol(p, (char **)&p, 10);
664 } else if (!strcmp(parameter, "destination")) {
665 struct in_addr ipaddr;
669 get_word_sep(buf, sizeof(buf), ";,", &p);
670 if (inet_aton(buf, &ipaddr))
671 th->destination = ntohl(ipaddr.s_addr);
674 while (*p != ';' && *p != '\0' && *p != ',')
682 reply->nb_transports++;
686 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
690 /* NOTE: we do case independent match for broken servers */
692 if (av_stristart(p, "Session:", &p)) {
693 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
694 } else if (av_stristart(p, "Content-Length:", &p)) {
695 reply->content_length = strtol(p, NULL, 10);
696 } else if (av_stristart(p, "Transport:", &p)) {
697 rtsp_parse_transport(reply, p);
698 } else if (av_stristart(p, "CSeq:", &p)) {
699 reply->seq = strtol(p, NULL, 10);
700 } else if (av_stristart(p, "Range:", &p)) {
701 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
705 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
711 ret = url_read(h, buf+len, size-len);
719 /* skip a RTP/TCP interleaved packet */
720 static void rtsp_skip_packet(AVFormatContext *s)
722 RTSPState *rt = s->priv_data;
726 ret = url_readbuf(rt->rtsp_hd, buf, 3);
729 len = AV_RB16(buf + 1);
731 printf("skipping RTP packet len=%d\n", len);
736 if (len1 > sizeof(buf))
738 ret = url_readbuf(rt->rtsp_hd, buf, len1);
745 static void rtsp_send_cmd(AVFormatContext *s,
746 const char *cmd, RTSPHeader *reply,
747 unsigned char **content_ptr)
749 RTSPState *rt = s->priv_data;
750 char buf[4096], buf1[1024], *q;
753 int content_length, line_count;
754 unsigned char *content = NULL;
756 memset(reply, 0, sizeof(RTSPHeader));
759 av_strlcpy(buf, cmd, sizeof(buf));
760 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
761 av_strlcat(buf, buf1, sizeof(buf));
762 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
763 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
764 av_strlcat(buf, buf1, sizeof(buf));
766 av_strlcat(buf, "\r\n", sizeof(buf));
768 printf("Sending:\n%s--\n", buf);
770 url_write(rt->rtsp_hd, buf, strlen(buf));
772 /* parse reply (XXX: use buffers) */
774 rt->last_reply[0] = '\0';
778 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
783 /* XXX: only parse it if first char on line ? */
785 } else if (ch != '\r') {
786 if ((q - buf) < sizeof(buf) - 1)
792 printf("line='%s'\n", buf);
794 /* test if last line */
798 if (line_count == 0) {
800 get_word(buf1, sizeof(buf1), &p);
801 get_word(buf1, sizeof(buf1), &p);
802 reply->status_code = atoi(buf1);
804 rtsp_parse_line(reply, p);
805 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
806 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
811 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
812 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
814 content_length = reply->content_length;
815 if (content_length > 0) {
816 /* leave some room for a trailing '\0' (useful for simple parsing) */
817 content = av_malloc(content_length + 1);
818 (void)url_readbuf(rt->rtsp_hd, content, content_length);
819 content[content_length] = '\0';
822 *content_ptr = content;
828 /* close and free RTSP streams */
829 static void rtsp_close_streams(RTSPState *rt)
834 for(i=0;i<rt->nb_rtsp_streams;i++) {
835 rtsp_st = rt->rtsp_streams[i];
837 if (rtsp_st->rtp_ctx)
838 rtp_parse_close(rtsp_st->rtp_ctx);
839 if (rtsp_st->rtp_handle)
840 url_close(rtsp_st->rtp_handle);
841 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
842 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
846 av_free(rt->rtsp_streams);
849 static int rtsp_read_header(AVFormatContext *s,
850 AVFormatParameters *ap)
852 RTSPState *rt = s->priv_data;
853 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
855 int port, i, j, ret, err;
856 RTSPHeader reply1, *reply = &reply1;
857 unsigned char *content = NULL;
859 int protocol_mask = 0;
862 /* extract hostname and port */
863 url_split(NULL, 0, NULL, 0,
864 host, sizeof(host), &port, path, sizeof(path), s->filename);
866 port = RTSP_DEFAULT_PORT;
868 /* search for options */
869 option_list = strchr(path, '?');
871 /* remove the options from the path */
874 /* move the option pointer */
875 option = option_list;
876 option_list = strchr(option_list, '&');
878 *(option_list++) = 0;
879 /* handle the options */
880 if (strcmp(option, "udp") == 0)
881 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
882 else if (strcmp(option, "multicast") == 0)
883 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
884 else if (strcmp(option, "tcp") == 0)
885 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
890 protocol_mask = rtsp_default_protocols;
892 /* open the tcp connexion */
893 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
894 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
896 rt->rtsp_hd = rtsp_hd;
899 /* describe the stream */
900 snprintf(cmd, sizeof(cmd),
901 "DESCRIBE %s RTSP/1.0\r\n"
902 "Accept: application/sdp\r\n",
904 rtsp_send_cmd(s, cmd, reply, &content);
906 err = AVERROR_INVALIDDATA;
909 if (reply->status_code != RTSP_STATUS_OK) {
910 err = AVERROR_INVALIDDATA;
914 /* now we got the SDP description, we parse it */
915 ret = sdp_parse(s, (const char *)content);
918 err = AVERROR_INVALIDDATA;
922 /* for each stream, make the setup request */
923 /* XXX: we assume the same server is used for the control of each
926 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
927 char transport[2048];
929 rtsp_st = rt->rtsp_streams[i];
931 /* compute available transports */
935 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
938 /* first try in specified port range */
939 if (RTSP_RTP_PORT_MIN != 0) {
940 while(j <= RTSP_RTP_PORT_MAX) {
941 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
942 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
943 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
949 /* then try on any port
950 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
951 ** err = AVERROR_INVALIDDATA;
957 port = rtp_get_local_port(rtsp_st->rtp_handle);
958 if (transport[0] != '\0')
959 av_strlcat(transport, ",", sizeof(transport));
960 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
961 "RTP/AVP/UDP;unicast;client_port=%d-%d",
966 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
967 if (transport[0] != '\0')
968 av_strlcat(transport, ",", sizeof(transport));
969 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
973 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
974 if (transport[0] != '\0')
975 av_strlcat(transport, ",", sizeof(transport));
976 snprintf(transport + strlen(transport),
977 sizeof(transport) - strlen(transport) - 1,
978 "RTP/AVP/UDP;multicast");
980 snprintf(cmd, sizeof(cmd),
981 "SETUP %s RTSP/1.0\r\n"
983 rtsp_st->control_url, transport);
984 rtsp_send_cmd(s, cmd, reply, NULL);
985 if (reply->status_code != RTSP_STATUS_OK ||
986 reply->nb_transports != 1) {
987 err = AVERROR_INVALIDDATA;
991 /* XXX: same protocol for all streams is required */
993 if (reply->transports[0].protocol != rt->protocol) {
994 err = AVERROR_INVALIDDATA;
998 rt->protocol = reply->transports[0].protocol;
1001 /* close RTP connection if not choosen */
1002 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
1003 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
1004 url_close(rtsp_st->rtp_handle);
1005 rtsp_st->rtp_handle = NULL;
1008 switch(reply->transports[0].protocol) {
1009 case RTSP_PROTOCOL_RTP_TCP:
1010 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1011 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1014 case RTSP_PROTOCOL_RTP_UDP:
1018 /* XXX: also use address if specified */
1019 snprintf(url, sizeof(url), "rtp://%s:%d",
1020 host, reply->transports[0].server_port_min);
1021 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1022 err = AVERROR_INVALIDDATA;
1027 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1032 in.s_addr = htonl(reply->transports[0].destination);
1033 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1035 reply->transports[0].port_min,
1036 reply->transports[0].ttl);
1037 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1038 err = AVERROR_INVALIDDATA;
1044 /* open the RTP context */
1046 if (rtsp_st->stream_index >= 0)
1047 st = s->streams[rtsp_st->stream_index];
1049 s->ctx_flags |= AVFMTCTX_NOHEADER;
1050 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1052 if (!rtsp_st->rtp_ctx) {
1053 err = AVERROR(ENOMEM);
1056 if(rtsp_st->dynamic_handler) {
1057 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1058 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1063 rt->state = RTSP_STATE_IDLE;
1064 rt->seek_timestamp = 0; /* default is to start stream at position
1066 if (ap->initial_pause) {
1067 /* do not start immediately */
1069 if (rtsp_read_play(s) < 0) {
1070 err = AVERROR_INVALIDDATA;
1076 rtsp_close_streams(rt);
1078 url_close(rt->rtsp_hd);
1082 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1083 uint8_t *buf, int buf_size)
1085 RTSPState *rt = s->priv_data;
1086 int id, len, i, ret;
1087 RTSPStream *rtsp_st;
1089 #ifdef DEBUG_RTP_TCP
1090 printf("tcp_read_packet:\n");
1094 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1095 #ifdef DEBUG_RTP_TCP
1096 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1103 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1107 len = AV_RB16(buf + 1);
1108 #ifdef DEBUG_RTP_TCP
1109 printf("id=%d len=%d\n", id, len);
1111 if (len > buf_size || len < 12)
1114 ret = url_readbuf(rt->rtsp_hd, buf, len);
1118 /* find the matching stream */
1119 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1120 rtsp_st = rt->rtsp_streams[i];
1121 if (id >= rtsp_st->interleaved_min &&
1122 id <= rtsp_st->interleaved_max)
1127 *prtsp_st = rtsp_st;
1131 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1132 uint8_t *buf, int buf_size)
1134 RTSPState *rt = s->priv_data;
1135 RTSPStream *rtsp_st;
1137 int fd1, fd2, fd_max, n, i, ret;
1141 if (url_interrupt_cb())
1142 return AVERROR(EINTR);
1145 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1146 rtsp_st = rt->rtsp_streams[i];
1147 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1148 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1154 tv.tv_usec = 100 * 1000;
1155 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1157 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1158 rtsp_st = rt->rtsp_streams[i];
1159 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1160 if (FD_ISSET(fd1, &rfds)) {
1161 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1163 *prtsp_st = rtsp_st;
1172 static int rtsp_read_packet(AVFormatContext *s,
1175 RTSPState *rt = s->priv_data;
1176 RTSPStream *rtsp_st;
1178 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1180 /* get next frames from the same RTP packet */
1182 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1186 } else if (ret == 1) {
1193 /* read next RTP packet */
1195 switch(rt->protocol) {
1197 case RTSP_PROTOCOL_RTP_TCP:
1198 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1200 case RTSP_PROTOCOL_RTP_UDP:
1201 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1202 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1203 if (len >=0 && rtsp_st->rtp_ctx)
1204 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1209 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1213 /* more packets may follow, so we save the RTP context */
1214 rt->cur_rtp = rtsp_st->rtp_ctx;
1219 static int rtsp_read_play(AVFormatContext *s)
1221 RTSPState *rt = s->priv_data;
1222 RTSPHeader reply1, *reply = &reply1;
1225 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1227 if (rt->state == RTSP_STATE_PAUSED) {
1228 snprintf(cmd, sizeof(cmd),
1229 "PLAY %s RTSP/1.0\r\n",
1232 snprintf(cmd, sizeof(cmd),
1233 "PLAY %s RTSP/1.0\r\n"
1234 "Range: npt=%0.3f-\r\n",
1236 (double)rt->seek_timestamp / AV_TIME_BASE);
1238 rtsp_send_cmd(s, cmd, reply, NULL);
1239 if (reply->status_code != RTSP_STATUS_OK) {
1242 rt->state = RTSP_STATE_PLAYING;
1247 /* pause the stream */
1248 static int rtsp_read_pause(AVFormatContext *s)
1250 RTSPState *rt = s->priv_data;
1251 RTSPHeader reply1, *reply = &reply1;
1256 if (rt->state != RTSP_STATE_PLAYING)
1259 snprintf(cmd, sizeof(cmd),
1260 "PAUSE %s RTSP/1.0\r\n",
1262 rtsp_send_cmd(s, cmd, reply, NULL);
1263 if (reply->status_code != RTSP_STATUS_OK) {
1266 rt->state = RTSP_STATE_PAUSED;
1271 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1272 int64_t timestamp, int flags)
1274 RTSPState *rt = s->priv_data;
1276 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1279 case RTSP_STATE_IDLE:
1281 case RTSP_STATE_PLAYING:
1282 if (rtsp_read_play(s) != 0)
1285 case RTSP_STATE_PAUSED:
1286 rt->state = RTSP_STATE_IDLE;
1292 static int rtsp_read_close(AVFormatContext *s)
1294 RTSPState *rt = s->priv_data;
1295 RTSPHeader reply1, *reply = &reply1;
1299 /* NOTE: it is valid to flush the buffer here */
1300 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1301 url_fclose(&rt->rtsp_gb);
1304 snprintf(cmd, sizeof(cmd),
1305 "TEARDOWN %s RTSP/1.0\r\n",
1307 rtsp_send_cmd(s, cmd, reply, NULL);
1309 rtsp_close_streams(rt);
1310 url_close(rt->rtsp_hd);
1314 #ifdef CONFIG_RTSP_DEMUXER
1315 AVInputFormat rtsp_demuxer = {
1317 "RTSP input format",
1324 .flags = AVFMT_NOFILE,
1325 .read_play = rtsp_read_play,
1326 .read_pause = rtsp_read_pause,
1330 static int sdp_probe(AVProbeData *p1)
1332 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1334 /* we look for a line beginning "c=IN IP4" */
1335 while (p < p_end && *p != '\0') {
1336 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1337 return AVPROBE_SCORE_MAX / 2;
1339 while(p < p_end - 1 && *p != '\n') p++;
1348 #define SDP_MAX_SIZE 8192
1350 static int sdp_read_header(AVFormatContext *s,
1351 AVFormatParameters *ap)
1353 RTSPState *rt = s->priv_data;
1354 RTSPStream *rtsp_st;
1360 /* read the whole sdp file */
1361 /* XXX: better loading */
1362 content = av_malloc(SDP_MAX_SIZE);
1363 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1366 return AVERROR_INVALIDDATA;
1368 content[size] ='\0';
1370 sdp_parse(s, content);
1373 /* open each RTP stream */
1374 for(i=0;i<rt->nb_rtsp_streams;i++) {
1375 rtsp_st = rt->rtsp_streams[i];
1377 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1378 inet_ntoa(rtsp_st->sdp_ip),
1381 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1382 err = AVERROR_INVALIDDATA;
1385 /* open the RTP context */
1387 if (rtsp_st->stream_index >= 0)
1388 st = s->streams[rtsp_st->stream_index];
1390 s->ctx_flags |= AVFMTCTX_NOHEADER;
1391 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1392 if (!rtsp_st->rtp_ctx) {
1393 err = AVERROR(ENOMEM);
1396 if(rtsp_st->dynamic_handler) {
1397 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1398 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1404 rtsp_close_streams(rt);
1408 static int sdp_read_packet(AVFormatContext *s,
1411 return rtsp_read_packet(s, pkt);
1414 static int sdp_read_close(AVFormatContext *s)
1416 RTSPState *rt = s->priv_data;
1417 rtsp_close_streams(rt);
1421 #ifdef CONFIG_SDP_DEMUXER
1422 AVInputFormat sdp_demuxer = {
1433 #ifdef CONFIG_REDIR_DEMUXER
1434 /* dummy redirector format (used directly in av_open_input_file now) */
1435 static int redir_probe(AVProbeData *pd)
1439 while (redir_isspace(*p))
1441 if (av_strstart(p, "http://", NULL) ||
1442 av_strstart(p, "rtsp://", NULL))
1443 return AVPROBE_SCORE_MAX;
1447 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1451 AVFormatContext *ic = NULL;
1452 ByteIOContext *f = s->pb;
1454 /* parse each URL and try to open it */
1456 while (c != URL_EOF) {
1459 if (!redir_isspace(c))
1468 if (c == URL_EOF || redir_isspace(c))
1470 if ((q - buf) < sizeof(buf) - 1)
1475 //printf("URL='%s'\n", buf);
1476 /* try to open the media file */
1477 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1481 return AVERROR(EIO);
1489 AVInputFormat redir_demuxer = {
1491 "Redirector format",