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)
535 static int sdp_parse(AVFormatContext *s, const char *content)
540 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
542 memset(s1, 0, sizeof(SDPParseState));
553 /* get the content */
555 while (*p != '\n' && *p != '\r' && *p != '\0') {
556 if ((q - buf) < sizeof(buf) - 1)
561 sdp_parse_line(s, s1, letter, buf);
563 while (*p != '\n' && *p != '\0')
571 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
578 v = strtol(p, (char **)&p, 10);
582 v = strtol(p, (char **)&p, 10);
591 /* XXX: only one transport specification is parsed */
592 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
594 char transport_protocol[16];
596 char lower_transport[16];
598 RTSPTransportField *th;
601 reply->nb_transports = 0;
608 th = &reply->transports[reply->nb_transports];
610 get_word_sep(transport_protocol, sizeof(transport_protocol),
614 if (!strcasecmp (transport_protocol, "rtp")) {
615 get_word_sep(profile, sizeof(profile), "/;,", &p);
616 lower_transport[0] = '\0';
617 /* rtp/avp/<protocol> */
620 get_word_sep(lower_transport, sizeof(lower_transport),
623 } else if (!strcasecmp (transport_protocol, "x-pn-tng")) {
624 /* x-pn-tng/<protocol> */
625 get_word_sep(lower_transport, sizeof(lower_transport), "/;,", &p);
628 if (!strcasecmp(lower_transport, "TCP"))
629 th->protocol = RTSP_PROTOCOL_RTP_TCP;
631 th->protocol = RTSP_PROTOCOL_RTP_UDP;
635 /* get each parameter */
636 while (*p != '\0' && *p != ',') {
637 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
638 if (!strcmp(parameter, "port")) {
641 rtsp_parse_range(&th->port_min, &th->port_max, &p);
643 } else if (!strcmp(parameter, "client_port")) {
646 rtsp_parse_range(&th->client_port_min,
647 &th->client_port_max, &p);
649 } else if (!strcmp(parameter, "server_port")) {
652 rtsp_parse_range(&th->server_port_min,
653 &th->server_port_max, &p);
655 } else if (!strcmp(parameter, "interleaved")) {
658 rtsp_parse_range(&th->interleaved_min,
659 &th->interleaved_max, &p);
661 } else if (!strcmp(parameter, "multicast")) {
662 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
663 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
664 } else if (!strcmp(parameter, "ttl")) {
667 th->ttl = strtol(p, (char **)&p, 10);
669 } else if (!strcmp(parameter, "destination")) {
670 struct in_addr ipaddr;
674 get_word_sep(buf, sizeof(buf), ";,", &p);
675 if (inet_aton(buf, &ipaddr))
676 th->destination = ntohl(ipaddr.s_addr);
679 while (*p != ';' && *p != '\0' && *p != ',')
687 reply->nb_transports++;
691 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
695 /* NOTE: we do case independent match for broken servers */
697 if (av_stristart(p, "Session:", &p)) {
698 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
699 } else if (av_stristart(p, "Content-Length:", &p)) {
700 reply->content_length = strtol(p, NULL, 10);
701 } else if (av_stristart(p, "Transport:", &p)) {
702 rtsp_parse_transport(reply, p);
703 } else if (av_stristart(p, "CSeq:", &p)) {
704 reply->seq = strtol(p, NULL, 10);
705 } else if (av_stristart(p, "Range:", &p)) {
706 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
710 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
716 ret = url_read(h, buf+len, size-len);
724 /* skip a RTP/TCP interleaved packet */
725 static void rtsp_skip_packet(AVFormatContext *s)
727 RTSPState *rt = s->priv_data;
731 ret = url_readbuf(rt->rtsp_hd, buf, 3);
734 len = AV_RB16(buf + 1);
736 printf("skipping RTP packet len=%d\n", len);
741 if (len1 > sizeof(buf))
743 ret = url_readbuf(rt->rtsp_hd, buf, len1);
750 static void rtsp_send_cmd(AVFormatContext *s,
751 const char *cmd, RTSPHeader *reply,
752 unsigned char **content_ptr)
754 RTSPState *rt = s->priv_data;
755 char buf[4096], buf1[1024], *q;
758 int content_length, line_count;
759 unsigned char *content = NULL;
761 memset(reply, 0, sizeof(RTSPHeader));
764 av_strlcpy(buf, cmd, sizeof(buf));
765 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
766 av_strlcat(buf, buf1, sizeof(buf));
767 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
768 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
769 av_strlcat(buf, buf1, sizeof(buf));
771 av_strlcat(buf, "\r\n", sizeof(buf));
773 printf("Sending:\n%s--\n", buf);
775 url_write(rt->rtsp_hd, buf, strlen(buf));
777 /* parse reply (XXX: use buffers) */
779 rt->last_reply[0] = '\0';
783 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
788 /* XXX: only parse it if first char on line ? */
790 } else if (ch != '\r') {
791 if ((q - buf) < sizeof(buf) - 1)
797 printf("line='%s'\n", buf);
799 /* test if last line */
803 if (line_count == 0) {
805 get_word(buf1, sizeof(buf1), &p);
806 get_word(buf1, sizeof(buf1), &p);
807 reply->status_code = atoi(buf1);
809 rtsp_parse_line(reply, p);
810 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
811 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
816 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
817 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
819 content_length = reply->content_length;
820 if (content_length > 0) {
821 /* leave some room for a trailing '\0' (useful for simple parsing) */
822 content = av_malloc(content_length + 1);
823 (void)url_readbuf(rt->rtsp_hd, content, content_length);
824 content[content_length] = '\0';
827 *content_ptr = content;
833 /* close and free RTSP streams */
834 static void rtsp_close_streams(RTSPState *rt)
839 for(i=0;i<rt->nb_rtsp_streams;i++) {
840 rtsp_st = rt->rtsp_streams[i];
842 if (rtsp_st->rtp_ctx)
843 rtp_parse_close(rtsp_st->rtp_ctx);
844 if (rtsp_st->rtp_handle)
845 url_close(rtsp_st->rtp_handle);
846 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
847 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
850 av_free(rt->rtsp_streams);
854 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
857 make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
859 RTSPState *rt = s->priv_data;
863 RTSPHeader reply1, *reply = &reply1;
866 /* for each stream, make the setup request */
867 /* XXX: we assume the same server is used for the control of each
870 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
871 char transport[2048];
873 rtsp_st = rt->rtsp_streams[i];
875 /* compute available transports */
879 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
882 /* first try in specified port range */
883 if (RTSP_RTP_PORT_MIN != 0) {
884 while(j <= RTSP_RTP_PORT_MAX) {
885 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
886 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
887 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
893 /* then try on any port
894 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
895 ** err = AVERROR_INVALIDDATA;
901 port = rtp_get_local_port(rtsp_st->rtp_handle);
902 if (transport[0] != '\0')
903 av_strlcat(transport, ",", sizeof(transport));
904 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
905 "RTP/AVP/UDP;unicast;client_port=%d-%d",
910 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
911 if (transport[0] != '\0')
912 av_strlcat(transport, ",", sizeof(transport));
913 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
917 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
918 if (transport[0] != '\0')
919 av_strlcat(transport, ",", sizeof(transport));
920 snprintf(transport + strlen(transport),
921 sizeof(transport) - strlen(transport) - 1,
922 "RTP/AVP/UDP;multicast");
924 snprintf(cmd, sizeof(cmd),
925 "SETUP %s RTSP/1.0\r\n"
927 rtsp_st->control_url, transport);
928 rtsp_send_cmd(s, cmd, reply, NULL);
929 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
932 } else if (reply->status_code != RTSP_STATUS_OK ||
933 reply->nb_transports != 1) {
934 err = AVERROR_INVALIDDATA;
938 /* XXX: same protocol for all streams is required */
940 if (reply->transports[0].protocol != rt->protocol) {
941 err = AVERROR_INVALIDDATA;
945 rt->protocol = reply->transports[0].protocol;
948 /* close RTP connection if not choosen */
949 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
950 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
951 url_close(rtsp_st->rtp_handle);
952 rtsp_st->rtp_handle = NULL;
955 switch(reply->transports[0].protocol) {
956 case RTSP_PROTOCOL_RTP_TCP:
957 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
958 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
961 case RTSP_PROTOCOL_RTP_UDP:
965 /* XXX: also use address if specified */
966 snprintf(url, sizeof(url), "rtp://%s:%d",
967 host, reply->transports[0].server_port_min);
968 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
969 err = AVERROR_INVALIDDATA;
974 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
979 in.s_addr = htonl(reply->transports[0].destination);
980 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
982 reply->transports[0].port_min,
983 reply->transports[0].ttl);
984 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
985 err = AVERROR_INVALIDDATA;
991 /* open the RTP context */
993 if (rtsp_st->stream_index >= 0)
994 st = s->streams[rtsp_st->stream_index];
996 s->ctx_flags |= AVFMTCTX_NOHEADER;
997 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
999 if (!rtsp_st->rtp_ctx) {
1000 err = AVERROR(ENOMEM);
1003 if(rtsp_st->dynamic_handler) {
1004 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1005 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1013 for (i=0; i<rt->nb_rtsp_streams; i++) {
1014 if (rt->rtsp_streams[i]->rtp_handle) {
1015 url_close(rt->rtsp_streams[i]->rtp_handle);
1016 rt->rtsp_streams[i]->rtp_handle = NULL;
1022 static int rtsp_read_header(AVFormatContext *s,
1023 AVFormatParameters *ap)
1025 RTSPState *rt = s->priv_data;
1026 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1027 URLContext *rtsp_hd;
1029 RTSPHeader reply1, *reply = &reply1;
1030 unsigned char *content = NULL;
1031 int protocol_mask = 0;
1033 /* extract hostname and port */
1034 url_split(NULL, 0, NULL, 0,
1035 host, sizeof(host), &port, path, sizeof(path), s->filename);
1037 port = RTSP_DEFAULT_PORT;
1039 /* search for options */
1040 option_list = strchr(path, '?');
1042 /* remove the options from the path */
1044 while(option_list) {
1045 /* move the option pointer */
1046 option = option_list;
1047 option_list = strchr(option_list, '&');
1049 *(option_list++) = 0;
1050 /* handle the options */
1051 if (strcmp(option, "udp") == 0)
1052 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1053 else if (strcmp(option, "multicast") == 0)
1054 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1055 else if (strcmp(option, "tcp") == 0)
1056 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1061 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
1063 /* open the tcp connexion */
1064 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1065 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1066 return AVERROR(EIO);
1067 rt->rtsp_hd = rtsp_hd;
1070 /* describe the stream */
1071 snprintf(cmd, sizeof(cmd),
1072 "DESCRIBE %s RTSP/1.0\r\n"
1073 "Accept: application/sdp\r\n",
1075 rtsp_send_cmd(s, cmd, reply, &content);
1077 err = AVERROR_INVALIDDATA;
1080 if (reply->status_code != RTSP_STATUS_OK) {
1081 err = AVERROR_INVALIDDATA;
1085 /* now we got the SDP description, we parse it */
1086 ret = sdp_parse(s, (const char *)content);
1089 err = AVERROR_INVALIDDATA;
1094 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
1096 err = make_setup_request(s, host, port, protocol);
1099 protocol_mask &= ~(1 << protocol);
1100 if (protocol_mask == 0 && err == 1) {
1101 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1106 rt->state = RTSP_STATE_IDLE;
1107 rt->seek_timestamp = 0; /* default is to start stream at position
1109 if (ap->initial_pause) {
1110 /* do not start immediately */
1112 if (rtsp_read_play(s) < 0) {
1113 err = AVERROR_INVALIDDATA;
1119 rtsp_close_streams(rt);
1121 url_close(rt->rtsp_hd);
1125 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1126 uint8_t *buf, int buf_size)
1128 RTSPState *rt = s->priv_data;
1129 int id, len, i, ret;
1130 RTSPStream *rtsp_st;
1132 #ifdef DEBUG_RTP_TCP
1133 printf("tcp_read_packet:\n");
1137 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1138 #ifdef DEBUG_RTP_TCP
1139 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1146 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1150 len = AV_RB16(buf + 1);
1151 #ifdef DEBUG_RTP_TCP
1152 printf("id=%d len=%d\n", id, len);
1154 if (len > buf_size || len < 12)
1157 ret = url_readbuf(rt->rtsp_hd, buf, len);
1161 /* find the matching stream */
1162 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1163 rtsp_st = rt->rtsp_streams[i];
1164 if (id >= rtsp_st->interleaved_min &&
1165 id <= rtsp_st->interleaved_max)
1170 *prtsp_st = rtsp_st;
1174 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1175 uint8_t *buf, int buf_size)
1177 RTSPState *rt = s->priv_data;
1178 RTSPStream *rtsp_st;
1180 int fd1, fd2, fd_max, n, i, ret;
1184 if (url_interrupt_cb())
1185 return AVERROR(EINTR);
1188 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1189 rtsp_st = rt->rtsp_streams[i];
1190 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1191 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1197 tv.tv_usec = 100 * 1000;
1198 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1200 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1201 rtsp_st = rt->rtsp_streams[i];
1202 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1203 if (FD_ISSET(fd1, &rfds)) {
1204 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1206 *prtsp_st = rtsp_st;
1215 static int rtsp_read_packet(AVFormatContext *s,
1218 RTSPState *rt = s->priv_data;
1219 RTSPStream *rtsp_st;
1221 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1223 /* get next frames from the same RTP packet */
1225 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1229 } else if (ret == 1) {
1236 /* read next RTP packet */
1238 switch(rt->protocol) {
1240 case RTSP_PROTOCOL_RTP_TCP:
1241 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1243 case RTSP_PROTOCOL_RTP_UDP:
1244 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1245 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1246 if (len >=0 && rtsp_st->rtp_ctx)
1247 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1252 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1256 /* more packets may follow, so we save the RTP context */
1257 rt->cur_rtp = rtsp_st->rtp_ctx;
1262 static int rtsp_read_play(AVFormatContext *s)
1264 RTSPState *rt = s->priv_data;
1265 RTSPHeader reply1, *reply = &reply1;
1268 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1270 if (rt->state == RTSP_STATE_PAUSED) {
1271 snprintf(cmd, sizeof(cmd),
1272 "PLAY %s RTSP/1.0\r\n",
1275 snprintf(cmd, sizeof(cmd),
1276 "PLAY %s RTSP/1.0\r\n"
1277 "Range: npt=%0.3f-\r\n",
1279 (double)rt->seek_timestamp / AV_TIME_BASE);
1281 rtsp_send_cmd(s, cmd, reply, NULL);
1282 if (reply->status_code != RTSP_STATUS_OK) {
1285 rt->state = RTSP_STATE_PLAYING;
1290 /* pause the stream */
1291 static int rtsp_read_pause(AVFormatContext *s)
1293 RTSPState *rt = s->priv_data;
1294 RTSPHeader reply1, *reply = &reply1;
1299 if (rt->state != RTSP_STATE_PLAYING)
1302 snprintf(cmd, sizeof(cmd),
1303 "PAUSE %s RTSP/1.0\r\n",
1305 rtsp_send_cmd(s, cmd, reply, NULL);
1306 if (reply->status_code != RTSP_STATUS_OK) {
1309 rt->state = RTSP_STATE_PAUSED;
1314 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1315 int64_t timestamp, int flags)
1317 RTSPState *rt = s->priv_data;
1319 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1322 case RTSP_STATE_IDLE:
1324 case RTSP_STATE_PLAYING:
1325 if (rtsp_read_play(s) != 0)
1328 case RTSP_STATE_PAUSED:
1329 rt->state = RTSP_STATE_IDLE;
1335 static int rtsp_read_close(AVFormatContext *s)
1337 RTSPState *rt = s->priv_data;
1338 RTSPHeader reply1, *reply = &reply1;
1342 /* NOTE: it is valid to flush the buffer here */
1343 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1344 url_fclose(&rt->rtsp_gb);
1347 snprintf(cmd, sizeof(cmd),
1348 "TEARDOWN %s RTSP/1.0\r\n",
1350 rtsp_send_cmd(s, cmd, reply, NULL);
1352 rtsp_close_streams(rt);
1353 url_close(rt->rtsp_hd);
1357 #ifdef CONFIG_RTSP_DEMUXER
1358 AVInputFormat rtsp_demuxer = {
1360 NULL_IF_CONFIG_SMALL("RTSP input format"),
1367 .flags = AVFMT_NOFILE,
1368 .read_play = rtsp_read_play,
1369 .read_pause = rtsp_read_pause,
1373 static int sdp_probe(AVProbeData *p1)
1375 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1377 /* we look for a line beginning "c=IN IP4" */
1378 while (p < p_end && *p != '\0') {
1379 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1380 return AVPROBE_SCORE_MAX / 2;
1382 while(p < p_end - 1 && *p != '\n') p++;
1391 #define SDP_MAX_SIZE 8192
1393 static int sdp_read_header(AVFormatContext *s,
1394 AVFormatParameters *ap)
1396 RTSPState *rt = s->priv_data;
1397 RTSPStream *rtsp_st;
1403 /* read the whole sdp file */
1404 /* XXX: better loading */
1405 content = av_malloc(SDP_MAX_SIZE);
1406 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1409 return AVERROR_INVALIDDATA;
1411 content[size] ='\0';
1413 sdp_parse(s, content);
1416 /* open each RTP stream */
1417 for(i=0;i<rt->nb_rtsp_streams;i++) {
1418 rtsp_st = rt->rtsp_streams[i];
1420 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1421 inet_ntoa(rtsp_st->sdp_ip),
1425 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1426 err = AVERROR_INVALIDDATA;
1429 /* open the RTP context */
1431 if (rtsp_st->stream_index >= 0)
1432 st = s->streams[rtsp_st->stream_index];
1434 s->ctx_flags |= AVFMTCTX_NOHEADER;
1435 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1436 if (!rtsp_st->rtp_ctx) {
1437 err = AVERROR(ENOMEM);
1440 if(rtsp_st->dynamic_handler) {
1441 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1442 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1448 rtsp_close_streams(rt);
1452 static int sdp_read_packet(AVFormatContext *s,
1455 return rtsp_read_packet(s, pkt);
1458 static int sdp_read_close(AVFormatContext *s)
1460 RTSPState *rt = s->priv_data;
1461 rtsp_close_streams(rt);
1465 #ifdef CONFIG_SDP_DEMUXER
1466 AVInputFormat sdp_demuxer = {
1468 NULL_IF_CONFIG_SMALL("SDP"),
1477 #ifdef CONFIG_REDIR_DEMUXER
1478 /* dummy redirector format (used directly in av_open_input_file now) */
1479 static int redir_probe(AVProbeData *pd)
1483 while (redir_isspace(*p))
1485 if (av_strstart(p, "http://", NULL) ||
1486 av_strstart(p, "rtsp://", NULL))
1487 return AVPROBE_SCORE_MAX;
1491 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1495 AVFormatContext *ic = NULL;
1496 ByteIOContext *f = s->pb;
1498 /* parse each URL and try to open it */
1500 while (c != URL_EOF) {
1503 if (!redir_isspace(c))
1512 if (c == URL_EOF || redir_isspace(c))
1514 if ((q - buf) < sizeof(buf) - 1)
1519 //printf("URL='%s'\n", buf);
1520 /* try to open the media file */
1521 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1525 return AVERROR(EIO);
1533 AVInputFormat redir_demuxer = {
1535 NULL_IF_CONFIG_SMALL("Redirector format"),