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 */
28 #include "rtp_internal.h"
31 //#define DEBUG_RTP_TCP
33 enum RTSPClientState {
39 typedef struct RTSPState {
40 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
42 struct RTSPStream **rtsp_streams;
44 enum RTSPClientState state;
45 int64_t seek_timestamp;
47 /* XXX: currently we use unbuffered input */
48 // ByteIOContext rtsp_gb;
49 int seq; /* RTSP command sequence number */
51 enum RTSPProtocol protocol;
52 char last_reply[2048]; /* XXX: allocate ? */
53 RTPDemuxContext *cur_rtp;
56 typedef struct RTSPStream {
57 URLContext *rtp_handle; /* RTP stream handle */
58 RTPDemuxContext *rtp_ctx; /* RTP parse context */
60 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
61 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
62 char control_url[1024]; /* url for this stream (from SDP) */
64 int sdp_port; /* port (from SDP content - not used in RTSP) */
65 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
66 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
67 int sdp_payload_type; /* payload type - only used in SDP */
68 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
70 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
71 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
74 static int rtsp_read_play(AVFormatContext *s);
76 /* XXX: currently, the only way to change the protocols consists in
77 changing this variable */
79 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
81 static int rtsp_probe(AVProbeData *p)
83 if (av_strstart(p->filename, "rtsp:", NULL))
84 return AVPROBE_SCORE_MAX;
88 static int redir_isspace(int c)
90 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
93 static void skip_spaces(const char **pp)
97 while (redir_isspace(*p))
102 static void get_word_sep(char *buf, int buf_size, const char *sep,
113 while (!strchr(sep, *p) && *p != '\0') {
114 if ((q - buf) < buf_size - 1)
123 static void get_word(char *buf, int buf_size, const char **pp)
131 while (!redir_isspace(*p) && *p != '\0') {
132 if ((q - buf) < buf_size - 1)
141 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
143 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
150 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
151 see if we can handle this kind of payload */
152 get_word_sep(buf, sizeof(buf), "/", &p);
153 if (payload_type >= RTP_PT_PRIVATE) {
154 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
156 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
157 codec->codec_id = handler->codec_id;
158 rtsp_st->dynamic_handler= handler;
160 rtsp_st->dynamic_protocol_context= handler->open();
164 handler= handler->next;
167 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
168 /* search into AVRtpPayloadTypes[] */
169 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
170 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
171 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
176 c = avcodec_find_decoder(codec->codec_id);
180 c_name = (char *)NULL;
183 get_word_sep(buf, sizeof(buf), "/", &p);
185 switch (codec->codec_type) {
186 case CODEC_TYPE_AUDIO:
187 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
188 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
189 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
191 codec->sample_rate = i;
192 get_word_sep(buf, sizeof(buf), "/", &p);
196 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
197 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
199 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
200 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
202 case CODEC_TYPE_VIDEO:
203 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
214 /* return the length and optionnaly the data */
215 static int hex_to_data(uint8_t *data, const char *p)
225 c = toupper((unsigned char)*p++);
226 if (c >= '0' && c <= '9')
228 else if (c >= 'A' && c <= 'F')
243 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
245 switch (codec->codec_id) {
248 if (!strcmp(attr, "config")) {
249 /* decode the hexa encoded parameter */
250 int len = hex_to_data(NULL, value);
251 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
252 if (!codec->extradata)
254 codec->extradata_size = len;
255 hex_to_data(codec->extradata, value);
264 typedef struct attrname_map
271 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
272 #define ATTR_NAME_TYPE_INT 0
273 #define ATTR_NAME_TYPE_STR 1
274 static attrname_map_t attr_names[]=
276 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
277 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
278 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
279 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
280 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
281 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
285 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
286 * because it is used in rtp_h264.c, which is forthcoming.
288 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
293 get_word_sep(attr, attr_size, "=", p);
296 get_word_sep(value, value_size, ";", p);
304 /* parse a SDP line and save stream attributes */
305 static void sdp_parse_fmtp(AVStream *st, const char *p)
311 RTSPStream *rtsp_st = st->priv_data;
312 AVCodecContext *codec = st->codec;
313 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
315 /* loop on each attribute */
316 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
318 /* grab the codec extra_data from the config parameter of the fmtp line */
319 sdp_parse_fmtp_config(codec, attr, value);
320 /* Looking for a known attribute */
321 for (i = 0; attr_names[i].str; ++i) {
322 if (!strcasecmp(attr, attr_names[i].str)) {
323 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
324 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
325 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
326 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
332 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
334 * Used for seeking in the rtp stream.
336 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
341 if (!av_stristart(p, "npt=", &p))
344 *start = AV_NOPTS_VALUE;
345 *end = AV_NOPTS_VALUE;
347 get_word_sep(buf, sizeof(buf), "-", &p);
348 *start = parse_date(buf, 1);
351 get_word_sep(buf, sizeof(buf), "-", &p);
352 *end = parse_date(buf, 1);
354 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
355 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
358 typedef struct SDPParseState {
360 struct in_addr default_ip;
364 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
365 int letter, const char *buf)
367 RTSPState *rt = s->priv_data;
368 char buf1[64], st_type[64];
370 int codec_type, payload_type, i;
373 struct in_addr sdp_ip;
377 printf("sdp: %c='%s'\n", letter, buf);
383 get_word(buf1, sizeof(buf1), &p);
384 if (strcmp(buf1, "IN") != 0)
386 get_word(buf1, sizeof(buf1), &p);
387 if (strcmp(buf1, "IP4") != 0)
389 get_word_sep(buf1, sizeof(buf1), "/", &p);
390 if (inet_aton(buf1, &sdp_ip) == 0)
395 get_word_sep(buf1, sizeof(buf1), "/", &p);
398 if (s->nb_streams == 0) {
399 s1->default_ip = sdp_ip;
400 s1->default_ttl = ttl;
402 st = s->streams[s->nb_streams - 1];
403 rtsp_st = st->priv_data;
404 rtsp_st->sdp_ip = sdp_ip;
405 rtsp_st->sdp_ttl = ttl;
409 av_strlcpy(s->title, p, sizeof(s->title));
412 if (s->nb_streams == 0) {
413 av_strlcpy(s->comment, p, sizeof(s->comment));
419 get_word(st_type, sizeof(st_type), &p);
420 if (!strcmp(st_type, "audio")) {
421 codec_type = CODEC_TYPE_AUDIO;
422 } else if (!strcmp(st_type, "video")) {
423 codec_type = CODEC_TYPE_VIDEO;
427 rtsp_st = av_mallocz(sizeof(RTSPStream));
430 rtsp_st->stream_index = -1;
431 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
433 rtsp_st->sdp_ip = s1->default_ip;
434 rtsp_st->sdp_ttl = s1->default_ttl;
436 get_word(buf1, sizeof(buf1), &p); /* port */
437 rtsp_st->sdp_port = atoi(buf1);
439 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
441 /* XXX: handle list of formats */
442 get_word(buf1, sizeof(buf1), &p); /* format list */
443 rtsp_st->sdp_payload_type = atoi(buf1);
445 if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
446 /* no corresponding stream */
448 st = av_new_stream(s, 0);
451 st->priv_data = rtsp_st;
452 rtsp_st->stream_index = st->index;
453 st->codec->codec_type = codec_type;
454 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
455 /* if standard payload type, we can find the codec right now */
456 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
459 /* put a default control url */
460 av_strlcpy(rtsp_st->control_url, s->filename, sizeof(rtsp_st->control_url));
463 if (av_strstart(p, "control:", &p) && s->nb_streams > 0) {
465 /* get the control url */
466 st = s->streams[s->nb_streams - 1];
467 rtsp_st = st->priv_data;
469 /* XXX: may need to add full url resolution */
470 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
471 if (proto[0] == '\0') {
472 /* relative control URL */
473 av_strlcat(rtsp_st->control_url, "/", sizeof(rtsp_st->control_url));
474 av_strlcat(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
476 av_strlcpy(rtsp_st->control_url, p, sizeof(rtsp_st->control_url));
478 } else if (av_strstart(p, "rtpmap:", &p)) {
479 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
480 get_word(buf1, sizeof(buf1), &p);
481 payload_type = atoi(buf1);
482 for(i = 0; i < s->nb_streams;i++) {
484 rtsp_st = st->priv_data;
485 if (rtsp_st->sdp_payload_type == payload_type) {
486 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
489 } else if (av_strstart(p, "fmtp:", &p)) {
490 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
491 get_word(buf1, sizeof(buf1), &p);
492 payload_type = atoi(buf1);
493 for(i = 0; i < s->nb_streams;i++) {
495 rtsp_st = st->priv_data;
496 if (rtsp_st->sdp_payload_type == payload_type) {
497 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
498 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
499 sdp_parse_fmtp(st, p);
502 sdp_parse_fmtp(st, p);
506 } else if(av_strstart(p, "framesize:", &p)) {
507 // let dynamic protocol handlers have a stab at the line.
508 get_word(buf1, sizeof(buf1), &p);
509 payload_type = atoi(buf1);
510 for(i = 0; i < s->nb_streams;i++) {
512 rtsp_st = st->priv_data;
513 if (rtsp_st->sdp_payload_type == payload_type) {
514 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
515 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
519 } else if(av_strstart(p, "range:", &p)) {
522 // this is so that seeking on a streamed file can work.
523 rtsp_parse_range_npt(p, &start, &end);
524 s->start_time= start;
525 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
531 static int sdp_parse(AVFormatContext *s, const char *content)
536 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
538 memset(s1, 0, sizeof(SDPParseState));
549 /* get the content */
551 while (*p != '\n' && *p != '\r' && *p != '\0') {
552 if ((q - buf) < sizeof(buf) - 1)
557 sdp_parse_line(s, s1, letter, buf);
559 while (*p != '\n' && *p != '\0')
567 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
574 v = strtol(p, (char **)&p, 10);
578 v = strtol(p, (char **)&p, 10);
587 /* XXX: only one transport specification is parsed */
588 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
590 char transport_protocol[16];
592 char lower_transport[16];
594 RTSPTransportField *th;
597 reply->nb_transports = 0;
604 th = &reply->transports[reply->nb_transports];
606 get_word_sep(transport_protocol, sizeof(transport_protocol),
610 get_word_sep(profile, sizeof(profile), "/;,", &p);
611 lower_transport[0] = '\0';
614 get_word_sep(lower_transport, sizeof(lower_transport),
617 if (!strcasecmp(lower_transport, "TCP"))
618 th->protocol = RTSP_PROTOCOL_RTP_TCP;
620 th->protocol = RTSP_PROTOCOL_RTP_UDP;
624 /* get each parameter */
625 while (*p != '\0' && *p != ',') {
626 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
627 if (!strcmp(parameter, "port")) {
630 rtsp_parse_range(&th->port_min, &th->port_max, &p);
632 } else if (!strcmp(parameter, "client_port")) {
635 rtsp_parse_range(&th->client_port_min,
636 &th->client_port_max, &p);
638 } else if (!strcmp(parameter, "server_port")) {
641 rtsp_parse_range(&th->server_port_min,
642 &th->server_port_max, &p);
644 } else if (!strcmp(parameter, "interleaved")) {
647 rtsp_parse_range(&th->interleaved_min,
648 &th->interleaved_max, &p);
650 } else if (!strcmp(parameter, "multicast")) {
651 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
652 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
653 } else if (!strcmp(parameter, "ttl")) {
656 th->ttl = strtol(p, (char **)&p, 10);
658 } else if (!strcmp(parameter, "destination")) {
659 struct in_addr ipaddr;
663 get_word_sep(buf, sizeof(buf), ";,", &p);
664 if (inet_aton(buf, &ipaddr))
665 th->destination = ntohl(ipaddr.s_addr);
668 while (*p != ';' && *p != '\0' && *p != ',')
676 reply->nb_transports++;
680 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
684 /* NOTE: we do case independent match for broken servers */
686 if (av_stristart(p, "Session:", &p)) {
687 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
688 } else if (av_stristart(p, "Content-Length:", &p)) {
689 reply->content_length = strtol(p, NULL, 10);
690 } else if (av_stristart(p, "Transport:", &p)) {
691 rtsp_parse_transport(reply, p);
692 } else if (av_stristart(p, "CSeq:", &p)) {
693 reply->seq = strtol(p, NULL, 10);
694 } else if (av_stristart(p, "Range:", &p)) {
695 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
699 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
705 ret = url_read(h, buf+len, size-len);
713 /* skip a RTP/TCP interleaved packet */
714 static void rtsp_skip_packet(AVFormatContext *s)
716 RTSPState *rt = s->priv_data;
720 ret = url_readbuf(rt->rtsp_hd, buf, 3);
723 len = AV_RB16(buf + 1);
725 printf("skipping RTP packet len=%d\n", len);
730 if (len1 > sizeof(buf))
732 ret = url_readbuf(rt->rtsp_hd, buf, len1);
739 static void rtsp_send_cmd(AVFormatContext *s,
740 const char *cmd, RTSPHeader *reply,
741 unsigned char **content_ptr)
743 RTSPState *rt = s->priv_data;
744 char buf[4096], buf1[1024], *q;
747 int content_length, line_count;
748 unsigned char *content = NULL;
750 memset(reply, 0, sizeof(RTSPHeader));
753 av_strlcpy(buf, cmd, sizeof(buf));
754 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
755 av_strlcat(buf, buf1, sizeof(buf));
756 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
757 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
758 av_strlcat(buf, buf1, sizeof(buf));
760 av_strlcat(buf, "\r\n", sizeof(buf));
762 printf("Sending:\n%s--\n", buf);
764 url_write(rt->rtsp_hd, buf, strlen(buf));
766 /* parse reply (XXX: use buffers) */
768 rt->last_reply[0] = '\0';
772 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
777 /* XXX: only parse it if first char on line ? */
779 } else if (ch != '\r') {
780 if ((q - buf) < sizeof(buf) - 1)
786 printf("line='%s'\n", buf);
788 /* test if last line */
792 if (line_count == 0) {
794 get_word(buf1, sizeof(buf1), &p);
795 get_word(buf1, sizeof(buf1), &p);
796 reply->status_code = atoi(buf1);
798 rtsp_parse_line(reply, p);
799 av_strlcat(rt->last_reply, p, sizeof(rt->last_reply));
800 av_strlcat(rt->last_reply, "\n", sizeof(rt->last_reply));
805 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
806 av_strlcpy(rt->session_id, reply->session_id, sizeof(rt->session_id));
808 content_length = reply->content_length;
809 if (content_length > 0) {
810 /* leave some room for a trailing '\0' (useful for simple parsing) */
811 content = av_malloc(content_length + 1);
812 (void)url_readbuf(rt->rtsp_hd, content, content_length);
813 content[content_length] = '\0';
816 *content_ptr = content;
820 /* close and free RTSP streams */
821 static void rtsp_close_streams(RTSPState *rt)
826 for(i=0;i<rt->nb_rtsp_streams;i++) {
827 rtsp_st = rt->rtsp_streams[i];
829 if (rtsp_st->rtp_ctx)
830 rtp_parse_close(rtsp_st->rtp_ctx);
831 if (rtsp_st->rtp_handle)
832 url_close(rtsp_st->rtp_handle);
833 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
834 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
838 av_free(rt->rtsp_streams);
841 static int rtsp_read_header(AVFormatContext *s,
842 AVFormatParameters *ap)
844 RTSPState *rt = s->priv_data;
845 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
847 int port, i, j, ret, err;
848 RTSPHeader reply1, *reply = &reply1;
849 unsigned char *content = NULL;
851 int protocol_mask = 0;
854 /* extract hostname and port */
855 url_split(NULL, 0, NULL, 0,
856 host, sizeof(host), &port, path, sizeof(path), s->filename);
858 port = RTSP_DEFAULT_PORT;
860 /* search for options */
861 option_list = strchr(path, '?');
863 /* remove the options from the path */
866 /* move the option pointer */
867 option = option_list;
868 option_list = strchr(option_list, '&');
870 *(option_list++) = 0;
871 /* handle the options */
872 if (strcmp(option, "udp") == 0)
873 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
874 else if (strcmp(option, "multicast") == 0)
875 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
876 else if (strcmp(option, "tcp") == 0)
877 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
882 protocol_mask = rtsp_default_protocols;
884 /* open the tcp connexion */
885 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
886 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
888 rt->rtsp_hd = rtsp_hd;
891 /* describe the stream */
892 snprintf(cmd, sizeof(cmd),
893 "DESCRIBE %s RTSP/1.0\r\n"
894 "Accept: application/sdp\r\n",
896 rtsp_send_cmd(s, cmd, reply, &content);
898 err = AVERROR_INVALIDDATA;
901 if (reply->status_code != RTSP_STATUS_OK) {
902 err = AVERROR_INVALIDDATA;
906 /* now we got the SDP description, we parse it */
907 ret = sdp_parse(s, (const char *)content);
910 err = AVERROR_INVALIDDATA;
914 /* for each stream, make the setup request */
915 /* XXX: we assume the same server is used for the control of each
918 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
919 char transport[2048];
921 rtsp_st = rt->rtsp_streams[i];
923 /* compute available transports */
927 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
930 /* first try in specified port range */
931 if (RTSP_RTP_PORT_MIN != 0) {
932 while(j <= RTSP_RTP_PORT_MAX) {
933 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
934 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
935 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
941 /* then try on any port
942 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
943 ** err = AVERROR_INVALIDDATA;
949 port = rtp_get_local_port(rtsp_st->rtp_handle);
950 if (transport[0] != '\0')
951 av_strlcat(transport, ",", sizeof(transport));
952 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
953 "RTP/AVP/UDP;unicast;client_port=%d-%d",
958 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
959 if (transport[0] != '\0')
960 av_strlcat(transport, ",", sizeof(transport));
961 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
965 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
966 if (transport[0] != '\0')
967 av_strlcat(transport, ",", sizeof(transport));
968 snprintf(transport + strlen(transport),
969 sizeof(transport) - strlen(transport) - 1,
970 "RTP/AVP/UDP;multicast");
972 snprintf(cmd, sizeof(cmd),
973 "SETUP %s RTSP/1.0\r\n"
975 rtsp_st->control_url, transport);
976 rtsp_send_cmd(s, cmd, reply, NULL);
977 if (reply->status_code != RTSP_STATUS_OK ||
978 reply->nb_transports != 1) {
979 err = AVERROR_INVALIDDATA;
983 /* XXX: same protocol for all streams is required */
985 if (reply->transports[0].protocol != rt->protocol) {
986 err = AVERROR_INVALIDDATA;
990 rt->protocol = reply->transports[0].protocol;
993 /* close RTP connection if not choosen */
994 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
995 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
996 url_close(rtsp_st->rtp_handle);
997 rtsp_st->rtp_handle = NULL;
1000 switch(reply->transports[0].protocol) {
1001 case RTSP_PROTOCOL_RTP_TCP:
1002 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
1003 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
1006 case RTSP_PROTOCOL_RTP_UDP:
1010 /* XXX: also use address if specified */
1011 snprintf(url, sizeof(url), "rtp://%s:%d",
1012 host, reply->transports[0].server_port_min);
1013 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1014 err = AVERROR_INVALIDDATA;
1019 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1024 ttl = reply->transports[0].ttl;
1027 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1029 reply->transports[0].server_port_min,
1031 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1032 err = AVERROR_INVALIDDATA;
1038 /* open the RTP context */
1040 if (rtsp_st->stream_index >= 0)
1041 st = s->streams[rtsp_st->stream_index];
1043 s->ctx_flags |= AVFMTCTX_NOHEADER;
1044 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1046 if (!rtsp_st->rtp_ctx) {
1047 err = AVERROR_NOMEM;
1050 if(rtsp_st->dynamic_handler) {
1051 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1052 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1057 rt->state = RTSP_STATE_IDLE;
1058 rt->seek_timestamp = 0; /* default is to start stream at position
1060 if (ap->initial_pause) {
1061 /* do not start immediately */
1063 if (rtsp_read_play(s) < 0) {
1064 err = AVERROR_INVALIDDATA;
1070 rtsp_close_streams(rt);
1072 url_close(rt->rtsp_hd);
1076 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1077 uint8_t *buf, int buf_size)
1079 RTSPState *rt = s->priv_data;
1080 int id, len, i, ret;
1081 RTSPStream *rtsp_st;
1083 #ifdef DEBUG_RTP_TCP
1084 printf("tcp_read_packet:\n");
1088 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1089 #ifdef DEBUG_RTP_TCP
1090 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1097 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1101 len = AV_RB16(buf + 1);
1102 #ifdef DEBUG_RTP_TCP
1103 printf("id=%d len=%d\n", id, len);
1105 if (len > buf_size || len < 12)
1108 ret = url_readbuf(rt->rtsp_hd, buf, len);
1112 /* find the matching stream */
1113 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1114 rtsp_st = rt->rtsp_streams[i];
1115 if (id >= rtsp_st->interleaved_min &&
1116 id <= rtsp_st->interleaved_max)
1121 *prtsp_st = rtsp_st;
1125 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1126 uint8_t *buf, int buf_size)
1128 RTSPState *rt = s->priv_data;
1129 RTSPStream *rtsp_st;
1131 int fd1, fd2, fd_max, n, i, ret;
1135 if (url_interrupt_cb())
1139 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1140 rtsp_st = rt->rtsp_streams[i];
1141 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1142 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1148 tv.tv_usec = 100 * 1000;
1149 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1151 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1152 rtsp_st = rt->rtsp_streams[i];
1153 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1154 if (FD_ISSET(fd1, &rfds)) {
1155 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1157 *prtsp_st = rtsp_st;
1166 static int rtsp_read_packet(AVFormatContext *s,
1169 RTSPState *rt = s->priv_data;
1170 RTSPStream *rtsp_st;
1172 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1174 /* get next frames from the same RTP packet */
1176 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1180 } else if (ret == 1) {
1187 /* read next RTP packet */
1189 switch(rt->protocol) {
1191 case RTSP_PROTOCOL_RTP_TCP:
1192 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1194 case RTSP_PROTOCOL_RTP_UDP:
1195 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1196 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1197 if (len >=0 && rtsp_st->rtp_ctx)
1198 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1203 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1207 /* more packets may follow, so we save the RTP context */
1208 rt->cur_rtp = rtsp_st->rtp_ctx;
1213 static int rtsp_read_play(AVFormatContext *s)
1215 RTSPState *rt = s->priv_data;
1216 RTSPHeader reply1, *reply = &reply1;
1219 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1221 if (rt->state == RTSP_STATE_PAUSED) {
1222 snprintf(cmd, sizeof(cmd),
1223 "PLAY %s RTSP/1.0\r\n",
1226 snprintf(cmd, sizeof(cmd),
1227 "PLAY %s RTSP/1.0\r\n"
1228 "Range: npt=%0.3f-\r\n",
1230 (double)rt->seek_timestamp / AV_TIME_BASE);
1232 rtsp_send_cmd(s, cmd, reply, NULL);
1233 if (reply->status_code != RTSP_STATUS_OK) {
1236 rt->state = RTSP_STATE_PLAYING;
1241 /* pause the stream */
1242 static int rtsp_read_pause(AVFormatContext *s)
1244 RTSPState *rt = s->priv_data;
1245 RTSPHeader reply1, *reply = &reply1;
1250 if (rt->state != RTSP_STATE_PLAYING)
1253 snprintf(cmd, sizeof(cmd),
1254 "PAUSE %s RTSP/1.0\r\n",
1256 rtsp_send_cmd(s, cmd, reply, NULL);
1257 if (reply->status_code != RTSP_STATUS_OK) {
1260 rt->state = RTSP_STATE_PAUSED;
1265 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1266 int64_t timestamp, int flags)
1268 RTSPState *rt = s->priv_data;
1270 rt->seek_timestamp = timestamp;
1273 case RTSP_STATE_IDLE:
1275 case RTSP_STATE_PLAYING:
1276 if (rtsp_read_play(s) != 0)
1279 case RTSP_STATE_PAUSED:
1280 rt->state = RTSP_STATE_IDLE;
1286 static int rtsp_read_close(AVFormatContext *s)
1288 RTSPState *rt = s->priv_data;
1289 RTSPHeader reply1, *reply = &reply1;
1293 /* NOTE: it is valid to flush the buffer here */
1294 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1295 url_fclose(&rt->rtsp_gb);
1298 snprintf(cmd, sizeof(cmd),
1299 "TEARDOWN %s RTSP/1.0\r\n",
1301 rtsp_send_cmd(s, cmd, reply, NULL);
1303 rtsp_close_streams(rt);
1304 url_close(rt->rtsp_hd);
1308 #ifdef CONFIG_RTSP_DEMUXER
1309 AVInputFormat rtsp_demuxer = {
1311 "RTSP input format",
1318 .flags = AVFMT_NOFILE,
1319 .read_play = rtsp_read_play,
1320 .read_pause = rtsp_read_pause,
1324 static int sdp_probe(AVProbeData *p1)
1326 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1328 /* we look for a line beginning "c=IN IP4" */
1329 while (p < p_end && *p != '\0') {
1330 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1331 return AVPROBE_SCORE_MAX / 2;
1333 while(p < p_end - 1 && *p != '\n') p++;
1342 #define SDP_MAX_SIZE 8192
1344 static int sdp_read_header(AVFormatContext *s,
1345 AVFormatParameters *ap)
1347 RTSPState *rt = s->priv_data;
1348 RTSPStream *rtsp_st;
1354 /* read the whole sdp file */
1355 /* XXX: better loading */
1356 content = av_malloc(SDP_MAX_SIZE);
1357 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1360 return AVERROR_INVALIDDATA;
1362 content[size] ='\0';
1364 sdp_parse(s, content);
1367 /* open each RTP stream */
1368 for(i=0;i<rt->nb_rtsp_streams;i++) {
1369 rtsp_st = rt->rtsp_streams[i];
1371 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1372 inet_ntoa(rtsp_st->sdp_ip),
1375 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1376 err = AVERROR_INVALIDDATA;
1379 /* open the RTP context */
1381 if (rtsp_st->stream_index >= 0)
1382 st = s->streams[rtsp_st->stream_index];
1384 s->ctx_flags |= AVFMTCTX_NOHEADER;
1385 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1386 if (!rtsp_st->rtp_ctx) {
1387 err = AVERROR_NOMEM;
1390 if(rtsp_st->dynamic_handler) {
1391 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1392 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1398 rtsp_close_streams(rt);
1402 static int sdp_read_packet(AVFormatContext *s,
1405 return rtsp_read_packet(s, pkt);
1408 static int sdp_read_close(AVFormatContext *s)
1410 RTSPState *rt = s->priv_data;
1411 rtsp_close_streams(rt);
1415 #ifdef CONFIG_SDP_DEMUXER
1416 AVInputFormat sdp_demuxer = {
1427 #ifdef CONFIG_REDIR_DEMUXER
1428 /* dummy redirector format (used directly in av_open_input_file now) */
1429 static int redir_probe(AVProbeData *pd)
1433 while (redir_isspace(*p))
1435 if (av_strstart(p, "http://", NULL) ||
1436 av_strstart(p, "rtsp://", NULL))
1437 return AVPROBE_SCORE_MAX;
1441 /* called from utils.c */
1442 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1446 AVFormatContext *ic = NULL;
1448 /* parse each URL and try to open it */
1450 while (c != URL_EOF) {
1453 if (!redir_isspace(c))
1462 if (c == URL_EOF || redir_isspace(c))
1464 if ((q - buf) < sizeof(buf) - 1)
1469 //printf("URL='%s'\n", buf);
1470 /* try to open the media file */
1471 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1481 AVInputFormat redir_demuxer = {
1483 "Redirector format",