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);
850 * @returns 0 on success, <0 on error, 1 if protocol is unavailable.
853 make_setup_request (AVFormatContext *s, const char *host, int port, int protocol)
855 RTSPState *rt = s->priv_data;
859 RTSPHeader reply1, *reply = &reply1;
862 /* for each stream, make the setup request */
863 /* XXX: we assume the same server is used for the control of each
866 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
867 char transport[2048];
869 rtsp_st = rt->rtsp_streams[i];
871 /* compute available transports */
875 if (protocol == RTSP_PROTOCOL_RTP_UDP) {
878 /* first try in specified port range */
879 if (RTSP_RTP_PORT_MIN != 0) {
880 while(j <= RTSP_RTP_PORT_MAX) {
881 snprintf(buf, sizeof(buf), "rtp://%s?localport=%d", host, j);
882 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
883 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
889 /* then try on any port
890 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
891 ** err = AVERROR_INVALIDDATA;
897 port = rtp_get_local_port(rtsp_st->rtp_handle);
898 if (transport[0] != '\0')
899 av_strlcat(transport, ",", sizeof(transport));
900 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
901 "RTP/AVP/UDP;unicast;client_port=%d-%d",
906 else if (protocol == RTSP_PROTOCOL_RTP_TCP) {
907 if (transport[0] != '\0')
908 av_strlcat(transport, ",", sizeof(transport));
909 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
913 else if (protocol == RTSP_PROTOCOL_RTP_UDP_MULTICAST) {
914 if (transport[0] != '\0')
915 av_strlcat(transport, ",", sizeof(transport));
916 snprintf(transport + strlen(transport),
917 sizeof(transport) - strlen(transport) - 1,
918 "RTP/AVP/UDP;multicast");
920 snprintf(cmd, sizeof(cmd),
921 "SETUP %s RTSP/1.0\r\n"
923 rtsp_st->control_url, transport);
924 rtsp_send_cmd(s, cmd, reply, NULL);
925 if (reply->status_code == 461 /* Unsupported protocol */ && i == 0) {
928 } else if (reply->status_code != RTSP_STATUS_OK ||
929 reply->nb_transports != 1) {
930 err = AVERROR_INVALIDDATA;
934 /* XXX: same protocol for all streams is required */
936 if (reply->transports[0].protocol != rt->protocol) {
937 err = AVERROR_INVALIDDATA;
941 rt->protocol = reply->transports[0].protocol;
944 /* close RTP connection if not choosen */
945 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
946 (protocol == RTSP_PROTOCOL_RTP_UDP)) {
947 url_close(rtsp_st->rtp_handle);
948 rtsp_st->rtp_handle = NULL;
951 switch(reply->transports[0].protocol) {
952 case RTSP_PROTOCOL_RTP_TCP:
953 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
954 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
957 case RTSP_PROTOCOL_RTP_UDP:
961 /* XXX: also use address if specified */
962 snprintf(url, sizeof(url), "rtp://%s:%d",
963 host, reply->transports[0].server_port_min);
964 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
965 err = AVERROR_INVALIDDATA;
970 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
975 in.s_addr = htonl(reply->transports[0].destination);
976 snprintf(url, sizeof(url), "rtp://%s:%d?ttl=%d",
978 reply->transports[0].port_min,
979 reply->transports[0].ttl);
980 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
981 err = AVERROR_INVALIDDATA;
987 /* open the RTP context */
989 if (rtsp_st->stream_index >= 0)
990 st = s->streams[rtsp_st->stream_index];
992 s->ctx_flags |= AVFMTCTX_NOHEADER;
993 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
995 if (!rtsp_st->rtp_ctx) {
996 err = AVERROR(ENOMEM);
999 if(rtsp_st->dynamic_handler) {
1000 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1001 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1009 for (i=0; i<rt->nb_rtsp_streams; i++) {
1010 if (rt->rtsp_streams[i]->rtp_handle) {
1011 url_close(rt->rtsp_streams[i]->rtp_handle);
1012 rt->rtsp_streams[i]->rtp_handle = NULL;
1018 static int rtsp_read_header(AVFormatContext *s,
1019 AVFormatParameters *ap)
1021 RTSPState *rt = s->priv_data;
1022 char host[1024], path[1024], tcpname[1024], cmd[2048], *option_list, *option;
1023 URLContext *rtsp_hd;
1025 RTSPHeader reply1, *reply = &reply1;
1026 unsigned char *content = NULL;
1027 int protocol_mask = 0;
1029 /* extract hostname and port */
1030 url_split(NULL, 0, NULL, 0,
1031 host, sizeof(host), &port, path, sizeof(path), s->filename);
1033 port = RTSP_DEFAULT_PORT;
1035 /* search for options */
1036 option_list = strchr(path, '?');
1038 /* remove the options from the path */
1040 while(option_list) {
1041 /* move the option pointer */
1042 option = option_list;
1043 option_list = strchr(option_list, '&');
1045 *(option_list++) = 0;
1046 /* handle the options */
1047 if (strcmp(option, "udp") == 0)
1048 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP);
1049 else if (strcmp(option, "multicast") == 0)
1050 protocol_mask = (1<< RTSP_PROTOCOL_RTP_UDP_MULTICAST);
1051 else if (strcmp(option, "tcp") == 0)
1052 protocol_mask = (1<< RTSP_PROTOCOL_RTP_TCP);
1057 protocol_mask = (1 << RTSP_PROTOCOL_RTP_LAST) - 1;
1059 /* open the tcp connexion */
1060 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
1061 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
1062 return AVERROR(EIO);
1063 rt->rtsp_hd = rtsp_hd;
1066 /* describe the stream */
1067 snprintf(cmd, sizeof(cmd),
1068 "DESCRIBE %s RTSP/1.0\r\n"
1069 "Accept: application/sdp\r\n",
1071 rtsp_send_cmd(s, cmd, reply, &content);
1073 err = AVERROR_INVALIDDATA;
1076 if (reply->status_code != RTSP_STATUS_OK) {
1077 err = AVERROR_INVALIDDATA;
1081 /* now we got the SDP description, we parse it */
1082 ret = sdp_parse(s, (const char *)content);
1085 err = AVERROR_INVALIDDATA;
1090 int protocol = ff_log2_tab[protocol_mask & ~(protocol_mask - 1)];
1092 err = make_setup_request(s, host, port, protocol);
1095 protocol_mask &= ~(1 << protocol);
1096 if (protocol_mask == 0 && err == 1) {
1097 err = AVERROR(FF_NETERROR(EPROTONOSUPPORT));
1102 rt->state = RTSP_STATE_IDLE;
1103 rt->seek_timestamp = 0; /* default is to start stream at position
1105 if (ap->initial_pause) {
1106 /* do not start immediately */
1108 if (rtsp_read_play(s) < 0) {
1109 err = AVERROR_INVALIDDATA;
1115 rtsp_close_streams(rt);
1117 url_close(rt->rtsp_hd);
1121 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1122 uint8_t *buf, int buf_size)
1124 RTSPState *rt = s->priv_data;
1125 int id, len, i, ret;
1126 RTSPStream *rtsp_st;
1128 #ifdef DEBUG_RTP_TCP
1129 printf("tcp_read_packet:\n");
1133 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1134 #ifdef DEBUG_RTP_TCP
1135 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1142 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1146 len = AV_RB16(buf + 1);
1147 #ifdef DEBUG_RTP_TCP
1148 printf("id=%d len=%d\n", id, len);
1150 if (len > buf_size || len < 12)
1153 ret = url_readbuf(rt->rtsp_hd, buf, len);
1157 /* find the matching stream */
1158 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1159 rtsp_st = rt->rtsp_streams[i];
1160 if (id >= rtsp_st->interleaved_min &&
1161 id <= rtsp_st->interleaved_max)
1166 *prtsp_st = rtsp_st;
1170 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1171 uint8_t *buf, int buf_size)
1173 RTSPState *rt = s->priv_data;
1174 RTSPStream *rtsp_st;
1176 int fd1, fd2, fd_max, n, i, ret;
1180 if (url_interrupt_cb())
1181 return AVERROR(EINTR);
1184 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1185 rtsp_st = rt->rtsp_streams[i];
1186 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1187 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1193 tv.tv_usec = 100 * 1000;
1194 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1196 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1197 rtsp_st = rt->rtsp_streams[i];
1198 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1199 if (FD_ISSET(fd1, &rfds)) {
1200 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1202 *prtsp_st = rtsp_st;
1211 static int rtsp_read_packet(AVFormatContext *s,
1214 RTSPState *rt = s->priv_data;
1215 RTSPStream *rtsp_st;
1217 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1219 /* get next frames from the same RTP packet */
1221 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1225 } else if (ret == 1) {
1232 /* read next RTP packet */
1234 switch(rt->protocol) {
1236 case RTSP_PROTOCOL_RTP_TCP:
1237 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1239 case RTSP_PROTOCOL_RTP_UDP:
1240 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1241 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1242 if (len >=0 && rtsp_st->rtp_ctx)
1243 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1248 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1252 /* more packets may follow, so we save the RTP context */
1253 rt->cur_rtp = rtsp_st->rtp_ctx;
1258 static int rtsp_read_play(AVFormatContext *s)
1260 RTSPState *rt = s->priv_data;
1261 RTSPHeader reply1, *reply = &reply1;
1264 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1266 if (rt->state == RTSP_STATE_PAUSED) {
1267 snprintf(cmd, sizeof(cmd),
1268 "PLAY %s RTSP/1.0\r\n",
1271 snprintf(cmd, sizeof(cmd),
1272 "PLAY %s RTSP/1.0\r\n"
1273 "Range: npt=%0.3f-\r\n",
1275 (double)rt->seek_timestamp / AV_TIME_BASE);
1277 rtsp_send_cmd(s, cmd, reply, NULL);
1278 if (reply->status_code != RTSP_STATUS_OK) {
1281 rt->state = RTSP_STATE_PLAYING;
1286 /* pause the stream */
1287 static int rtsp_read_pause(AVFormatContext *s)
1289 RTSPState *rt = s->priv_data;
1290 RTSPHeader reply1, *reply = &reply1;
1295 if (rt->state != RTSP_STATE_PLAYING)
1298 snprintf(cmd, sizeof(cmd),
1299 "PAUSE %s RTSP/1.0\r\n",
1301 rtsp_send_cmd(s, cmd, reply, NULL);
1302 if (reply->status_code != RTSP_STATUS_OK) {
1305 rt->state = RTSP_STATE_PAUSED;
1310 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1311 int64_t timestamp, int flags)
1313 RTSPState *rt = s->priv_data;
1315 rt->seek_timestamp = av_rescale_q(timestamp, s->streams[stream_index]->time_base, AV_TIME_BASE_Q);
1318 case RTSP_STATE_IDLE:
1320 case RTSP_STATE_PLAYING:
1321 if (rtsp_read_play(s) != 0)
1324 case RTSP_STATE_PAUSED:
1325 rt->state = RTSP_STATE_IDLE;
1331 static int rtsp_read_close(AVFormatContext *s)
1333 RTSPState *rt = s->priv_data;
1334 RTSPHeader reply1, *reply = &reply1;
1338 /* NOTE: it is valid to flush the buffer here */
1339 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1340 url_fclose(&rt->rtsp_gb);
1343 snprintf(cmd, sizeof(cmd),
1344 "TEARDOWN %s RTSP/1.0\r\n",
1346 rtsp_send_cmd(s, cmd, reply, NULL);
1348 rtsp_close_streams(rt);
1349 url_close(rt->rtsp_hd);
1353 #ifdef CONFIG_RTSP_DEMUXER
1354 AVInputFormat rtsp_demuxer = {
1356 "RTSP input format",
1363 .flags = AVFMT_NOFILE,
1364 .read_play = rtsp_read_play,
1365 .read_pause = rtsp_read_pause,
1369 static int sdp_probe(AVProbeData *p1)
1371 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1373 /* we look for a line beginning "c=IN IP4" */
1374 while (p < p_end && *p != '\0') {
1375 if (p + sizeof("c=IN IP4") - 1 < p_end && av_strstart(p, "c=IN IP4", NULL))
1376 return AVPROBE_SCORE_MAX / 2;
1378 while(p < p_end - 1 && *p != '\n') p++;
1387 #define SDP_MAX_SIZE 8192
1389 static int sdp_read_header(AVFormatContext *s,
1390 AVFormatParameters *ap)
1392 RTSPState *rt = s->priv_data;
1393 RTSPStream *rtsp_st;
1399 /* read the whole sdp file */
1400 /* XXX: better loading */
1401 content = av_malloc(SDP_MAX_SIZE);
1402 size = get_buffer(s->pb, content, SDP_MAX_SIZE - 1);
1405 return AVERROR_INVALIDDATA;
1407 content[size] ='\0';
1409 sdp_parse(s, content);
1412 /* open each RTP stream */
1413 for(i=0;i<rt->nb_rtsp_streams;i++) {
1414 rtsp_st = rt->rtsp_streams[i];
1416 snprintf(url, sizeof(url), "rtp://%s:%d?localport=%d&ttl=%d",
1417 inet_ntoa(rtsp_st->sdp_ip),
1421 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1422 err = AVERROR_INVALIDDATA;
1425 /* open the RTP context */
1427 if (rtsp_st->stream_index >= 0)
1428 st = s->streams[rtsp_st->stream_index];
1430 s->ctx_flags |= AVFMTCTX_NOHEADER;
1431 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1432 if (!rtsp_st->rtp_ctx) {
1433 err = AVERROR(ENOMEM);
1436 if(rtsp_st->dynamic_handler) {
1437 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1438 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1444 rtsp_close_streams(rt);
1448 static int sdp_read_packet(AVFormatContext *s,
1451 return rtsp_read_packet(s, pkt);
1454 static int sdp_read_close(AVFormatContext *s)
1456 RTSPState *rt = s->priv_data;
1457 rtsp_close_streams(rt);
1461 #ifdef CONFIG_SDP_DEMUXER
1462 AVInputFormat sdp_demuxer = {
1473 #ifdef CONFIG_REDIR_DEMUXER
1474 /* dummy redirector format (used directly in av_open_input_file now) */
1475 static int redir_probe(AVProbeData *pd)
1479 while (redir_isspace(*p))
1481 if (av_strstart(p, "http://", NULL) ||
1482 av_strstart(p, "rtsp://", NULL))
1483 return AVPROBE_SCORE_MAX;
1487 static int redir_read_header(AVFormatContext *s, AVFormatParameters *ap)
1491 AVFormatContext *ic = NULL;
1492 ByteIOContext *f = s->pb;
1494 /* parse each URL and try to open it */
1496 while (c != URL_EOF) {
1499 if (!redir_isspace(c))
1508 if (c == URL_EOF || redir_isspace(c))
1510 if ((q - buf) < sizeof(buf) - 1)
1515 //printf("URL='%s'\n", buf);
1516 /* try to open the media file */
1517 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1521 return AVERROR(EIO);
1529 AVInputFormat redir_demuxer = {
1531 "Redirector format",