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
23 #include <unistd.h> /* for select() prototype */
25 #include <netinet/in.h>
26 #include <sys/socket.h>
28 # include <arpa/inet.h>
30 # include "barpainet.h"
33 #include "rtp_internal.h"
36 //#define DEBUG_RTP_TCP
38 enum RTSPClientState {
44 typedef struct RTSPState {
45 URLContext *rtsp_hd; /* RTSP TCP connexion handle */
47 struct RTSPStream **rtsp_streams;
49 enum RTSPClientState state;
50 int64_t seek_timestamp;
52 /* XXX: currently we use unbuffered input */
53 // ByteIOContext rtsp_gb;
54 int seq; /* RTSP command sequence number */
56 enum RTSPProtocol protocol;
57 char last_reply[2048]; /* XXX: allocate ? */
58 RTPDemuxContext *cur_rtp;
61 typedef struct RTSPStream {
62 URLContext *rtp_handle; /* RTP stream handle */
63 RTPDemuxContext *rtp_ctx; /* RTP parse context */
65 int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */
66 int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */
67 char control_url[1024]; /* url for this stream (from SDP) */
69 int sdp_port; /* port (from SDP content - not used in RTSP) */
70 struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */
71 int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */
72 int sdp_payload_type; /* payload type - only used in SDP */
73 rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
75 RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure)
76 void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol)
79 static int rtsp_read_play(AVFormatContext *s);
81 /* XXX: currently, the only way to change the protocols consists in
82 changing this variable */
84 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP);
86 FFRTSPCallback *ff_rtsp_callback = NULL;
88 static int rtsp_probe(AVProbeData *p)
90 if (strstart(p->filename, "rtsp:", NULL))
91 return AVPROBE_SCORE_MAX;
95 static int redir_isspace(int c)
97 return (c == ' ' || c == '\t' || c == '\n' || c == '\r');
100 static void skip_spaces(const char **pp)
104 while (redir_isspace(*p))
109 static void get_word_sep(char *buf, int buf_size, const char *sep,
120 while (!strchr(sep, *p) && *p != '\0') {
121 if ((q - buf) < buf_size - 1)
130 static void get_word(char *buf, int buf_size, const char **pp)
138 while (!redir_isspace(*p) && *p != '\0') {
139 if ((q - buf) < buf_size - 1)
148 /* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
150 static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p)
157 /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
158 see if we can handle this kind of payload */
159 get_word_sep(buf, sizeof(buf), "/", &p);
160 if (payload_type >= RTP_PT_PRIVATE) {
161 RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler;
163 if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) {
164 codec->codec_id = handler->codec_id;
165 rtsp_st->dynamic_handler= handler;
167 rtsp_st->dynamic_protocol_context= handler->open();
171 handler= handler->next;
174 /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
175 /* search into AVRtpPayloadTypes[] */
176 for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i)
177 if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
178 codec->codec_id = AVRtpPayloadTypes[i].codec_id;
183 c = avcodec_find_decoder(codec->codec_id);
187 c_name = (char *)NULL;
190 get_word_sep(buf, sizeof(buf), "/", &p);
192 switch (codec->codec_type) {
193 case CODEC_TYPE_AUDIO:
194 av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
195 codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE;
196 codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS;
198 codec->sample_rate = i;
199 get_word_sep(buf, sizeof(buf), "/", &p);
203 // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the
204 // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm)
206 av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
207 av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
209 case CODEC_TYPE_VIDEO:
210 av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
221 /* return the length and optionnaly the data */
222 static int hex_to_data(uint8_t *data, const char *p)
232 c = toupper((unsigned char)*p++);
233 if (c >= '0' && c <= '9')
235 else if (c >= 'A' && c <= 'F')
250 static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value)
252 switch (codec->codec_id) {
255 if (!strcmp(attr, "config")) {
256 /* decode the hexa encoded parameter */
257 int len = hex_to_data(NULL, value);
258 codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);
259 if (!codec->extradata)
261 codec->extradata_size = len;
262 hex_to_data(codec->extradata, value);
271 typedef struct attrname_map
278 /* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
279 #define ATTR_NAME_TYPE_INT 0
280 #define ATTR_NAME_TYPE_STR 1
281 static attrname_map_t attr_names[]=
283 {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
284 {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
285 {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
286 {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
287 {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
288 {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
292 /** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function
293 * because it is used in rtp_h264.c, which is forthcoming.
295 int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size)
300 get_word_sep(attr, attr_size, "=", p);
303 get_word_sep(value, value_size, ";", p);
311 /* parse a SDP line and save stream attributes */
312 static void sdp_parse_fmtp(AVStream *st, const char *p)
318 RTSPStream *rtsp_st = st->priv_data;
319 AVCodecContext *codec = st->codec;
320 rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data;
322 /* loop on each attribute */
323 while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value)))
325 /* grab the codec extra_data from the config parameter of the fmtp line */
326 sdp_parse_fmtp_config(codec, attr, value);
327 /* Looking for a known attribute */
328 for (i = 0; attr_names[i].str; ++i) {
329 if (!strcasecmp(attr, attr_names[i].str)) {
330 if (attr_names[i].type == ATTR_NAME_TYPE_INT)
331 *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value);
332 else if (attr_names[i].type == ATTR_NAME_TYPE_STR)
333 *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value);
339 /** Parse a string \p in the form of Range:npt=xx-xx, and determine the start
341 * Used for seeking in the rtp stream.
343 static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end)
348 if (!stristart(p, "npt=", &p))
351 *start = AV_NOPTS_VALUE;
352 *end = AV_NOPTS_VALUE;
354 get_word_sep(buf, sizeof(buf), "-", &p);
355 *start = parse_date(buf, 1);
358 get_word_sep(buf, sizeof(buf), "-", &p);
359 *end = parse_date(buf, 1);
361 // av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start);
362 // av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end);
365 typedef struct SDPParseState {
367 struct in_addr default_ip;
371 static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1,
372 int letter, const char *buf)
374 RTSPState *rt = s->priv_data;
375 char buf1[64], st_type[64];
377 int codec_type, payload_type, i;
380 struct in_addr sdp_ip;
384 printf("sdp: %c='%s'\n", letter, buf);
390 get_word(buf1, sizeof(buf1), &p);
391 if (strcmp(buf1, "IN") != 0)
393 get_word(buf1, sizeof(buf1), &p);
394 if (strcmp(buf1, "IP4") != 0)
396 get_word_sep(buf1, sizeof(buf1), "/", &p);
397 if (inet_aton(buf1, &sdp_ip) == 0)
402 get_word_sep(buf1, sizeof(buf1), "/", &p);
405 if (s->nb_streams == 0) {
406 s1->default_ip = sdp_ip;
407 s1->default_ttl = ttl;
409 st = s->streams[s->nb_streams - 1];
410 rtsp_st = st->priv_data;
411 rtsp_st->sdp_ip = sdp_ip;
412 rtsp_st->sdp_ttl = ttl;
416 pstrcpy(s->title, sizeof(s->title), p);
419 if (s->nb_streams == 0) {
420 pstrcpy(s->comment, sizeof(s->comment), p);
426 get_word(st_type, sizeof(st_type), &p);
427 if (!strcmp(st_type, "audio")) {
428 codec_type = CODEC_TYPE_AUDIO;
429 } else if (!strcmp(st_type, "video")) {
430 codec_type = CODEC_TYPE_VIDEO;
434 rtsp_st = av_mallocz(sizeof(RTSPStream));
437 rtsp_st->stream_index = -1;
438 dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st);
440 rtsp_st->sdp_ip = s1->default_ip;
441 rtsp_st->sdp_ttl = s1->default_ttl;
443 get_word(buf1, sizeof(buf1), &p); /* port */
444 rtsp_st->sdp_port = atoi(buf1);
446 get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */
448 /* XXX: handle list of formats */
449 get_word(buf1, sizeof(buf1), &p); /* format list */
450 rtsp_st->sdp_payload_type = atoi(buf1);
452 if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) {
453 /* no corresponding stream */
455 st = av_new_stream(s, 0);
458 st->priv_data = rtsp_st;
459 rtsp_st->stream_index = st->index;
460 st->codec->codec_type = codec_type;
461 if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
462 /* if standard payload type, we can find the codec right now */
463 rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type);
466 /* put a default control url */
467 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
470 if (strstart(p, "control:", &p) && s->nb_streams > 0) {
472 /* get the control url */
473 st = s->streams[s->nb_streams - 1];
474 rtsp_st = st->priv_data;
476 /* XXX: may need to add full url resolution */
477 url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p);
478 if (proto[0] == '\0') {
479 /* relative control URL */
480 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/");
481 pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
483 pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
485 } else if (strstart(p, "rtpmap:", &p)) {
486 /* NOTE: rtpmap is only supported AFTER the 'm=' tag */
487 get_word(buf1, sizeof(buf1), &p);
488 payload_type = atoi(buf1);
489 for(i = 0; i < s->nb_streams;i++) {
491 rtsp_st = st->priv_data;
492 if (rtsp_st->sdp_payload_type == payload_type) {
493 sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p);
496 } else if (strstart(p, "fmtp:", &p)) {
497 /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
498 get_word(buf1, sizeof(buf1), &p);
499 payload_type = atoi(buf1);
500 for(i = 0; i < s->nb_streams;i++) {
502 rtsp_st = st->priv_data;
503 if (rtsp_st->sdp_payload_type == payload_type) {
504 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
505 if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) {
506 sdp_parse_fmtp(st, p);
509 sdp_parse_fmtp(st, p);
513 } else if(strstart(p, "framesize:", &p)) {
514 // let dynamic protocol handlers have a stab at the line.
515 get_word(buf1, sizeof(buf1), &p);
516 payload_type = atoi(buf1);
517 for(i = 0; i < s->nb_streams;i++) {
519 rtsp_st = st->priv_data;
520 if (rtsp_st->sdp_payload_type == payload_type) {
521 if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) {
522 rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf);
526 } else if(strstart(p, "range:", &p)) {
529 // this is so that seeking on a streamed file can work.
530 rtsp_parse_range_npt(p, &start, &end);
531 s->start_time= start;
532 s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek)
538 static int sdp_parse(AVFormatContext *s, const char *content)
543 SDPParseState sdp_parse_state, *s1 = &sdp_parse_state;
545 memset(s1, 0, sizeof(SDPParseState));
556 /* get the content */
558 while (*p != '\n' && *p != '\r' && *p != '\0') {
559 if ((q - buf) < sizeof(buf) - 1)
564 sdp_parse_line(s, s1, letter, buf);
566 while (*p != '\n' && *p != '\0')
574 static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp)
581 v = strtol(p, (char **)&p, 10);
585 v = strtol(p, (char **)&p, 10);
594 /* XXX: only one transport specification is parsed */
595 static void rtsp_parse_transport(RTSPHeader *reply, const char *p)
597 char transport_protocol[16];
599 char lower_transport[16];
601 RTSPTransportField *th;
604 reply->nb_transports = 0;
611 th = &reply->transports[reply->nb_transports];
613 get_word_sep(transport_protocol, sizeof(transport_protocol),
617 get_word_sep(profile, sizeof(profile), "/;,", &p);
618 lower_transport[0] = '\0';
621 get_word_sep(lower_transport, sizeof(lower_transport),
624 if (!strcasecmp(lower_transport, "TCP"))
625 th->protocol = RTSP_PROTOCOL_RTP_TCP;
627 th->protocol = RTSP_PROTOCOL_RTP_UDP;
631 /* get each parameter */
632 while (*p != '\0' && *p != ',') {
633 get_word_sep(parameter, sizeof(parameter), "=;,", &p);
634 if (!strcmp(parameter, "port")) {
637 rtsp_parse_range(&th->port_min, &th->port_max, &p);
639 } else if (!strcmp(parameter, "client_port")) {
642 rtsp_parse_range(&th->client_port_min,
643 &th->client_port_max, &p);
645 } else if (!strcmp(parameter, "server_port")) {
648 rtsp_parse_range(&th->server_port_min,
649 &th->server_port_max, &p);
651 } else if (!strcmp(parameter, "interleaved")) {
654 rtsp_parse_range(&th->interleaved_min,
655 &th->interleaved_max, &p);
657 } else if (!strcmp(parameter, "multicast")) {
658 if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
659 th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST;
660 } else if (!strcmp(parameter, "ttl")) {
663 th->ttl = strtol(p, (char **)&p, 10);
665 } else if (!strcmp(parameter, "destination")) {
666 struct in_addr ipaddr;
670 get_word_sep(buf, sizeof(buf), ";,", &p);
671 if (inet_aton(buf, &ipaddr))
672 th->destination = ntohl(ipaddr.s_addr);
675 while (*p != ';' && *p != '\0' && *p != ',')
683 reply->nb_transports++;
687 void rtsp_parse_line(RTSPHeader *reply, const char *buf)
691 /* NOTE: we do case independent match for broken servers */
693 if (stristart(p, "Session:", &p)) {
694 get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p);
695 } else if (stristart(p, "Content-Length:", &p)) {
696 reply->content_length = strtol(p, NULL, 10);
697 } else if (stristart(p, "Transport:", &p)) {
698 rtsp_parse_transport(reply, p);
699 } else if (stristart(p, "CSeq:", &p)) {
700 reply->seq = strtol(p, NULL, 10);
701 } else if (stristart(p, "Range:", &p)) {
702 rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end);
706 static int url_readbuf(URLContext *h, unsigned char *buf, int size)
712 ret = url_read(h, buf+len, size-len);
720 /* skip a RTP/TCP interleaved packet */
721 static void rtsp_skip_packet(AVFormatContext *s)
723 RTSPState *rt = s->priv_data;
727 ret = url_readbuf(rt->rtsp_hd, buf, 3);
730 len = (buf[1] << 8) | buf[2];
732 printf("skipping RTP packet len=%d\n", len);
737 if (len1 > sizeof(buf))
739 ret = url_readbuf(rt->rtsp_hd, buf, len1);
746 static void rtsp_send_cmd(AVFormatContext *s,
747 const char *cmd, RTSPHeader *reply,
748 unsigned char **content_ptr)
750 RTSPState *rt = s->priv_data;
751 char buf[4096], buf1[1024], *q;
754 int content_length, line_count;
755 unsigned char *content = NULL;
757 memset(reply, 0, sizeof(RTSPHeader));
760 pstrcpy(buf, sizeof(buf), cmd);
761 snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq);
762 pstrcat(buf, sizeof(buf), buf1);
763 if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) {
764 snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id);
765 pstrcat(buf, sizeof(buf), buf1);
767 pstrcat(buf, sizeof(buf), "\r\n");
769 printf("Sending:\n%s--\n", buf);
771 url_write(rt->rtsp_hd, buf, strlen(buf));
773 /* parse reply (XXX: use buffers) */
775 rt->last_reply[0] = '\0';
779 if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1)
784 /* XXX: only parse it if first char on line ? */
786 } else if (ch != '\r') {
787 if ((q - buf) < sizeof(buf) - 1)
793 printf("line='%s'\n", buf);
795 /* test if last line */
799 if (line_count == 0) {
801 get_word(buf1, sizeof(buf1), &p);
802 get_word(buf1, sizeof(buf1), &p);
803 reply->status_code = atoi(buf1);
805 rtsp_parse_line(reply, p);
806 pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
807 pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n");
812 if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0')
813 pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
815 content_length = reply->content_length;
816 if (content_length > 0) {
817 /* leave some room for a trailing '\0' (useful for simple parsing) */
818 content = av_malloc(content_length + 1);
819 (void)url_readbuf(rt->rtsp_hd, content, content_length);
820 content[content_length] = '\0';
823 *content_ptr = content;
826 /* useful for modules: set RTSP callback function */
828 void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
830 ff_rtsp_callback = rtsp_cb;
834 /* close and free RTSP streams */
835 static void rtsp_close_streams(RTSPState *rt)
840 for(i=0;i<rt->nb_rtsp_streams;i++) {
841 rtsp_st = rt->rtsp_streams[i];
843 if (rtsp_st->rtp_ctx)
844 rtp_parse_close(rtsp_st->rtp_ctx);
845 if (rtsp_st->rtp_handle)
846 url_close(rtsp_st->rtp_handle);
847 if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context)
848 rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context);
852 av_free(rt->rtsp_streams);
855 static int rtsp_read_header(AVFormatContext *s,
856 AVFormatParameters *ap)
858 RTSPState *rt = s->priv_data;
859 char host[1024], path[1024], tcpname[1024], cmd[2048];
861 int port, i, j, ret, err;
862 RTSPHeader reply1, *reply = &reply1;
863 unsigned char *content = NULL;
868 /* extract hostname and port */
869 url_split(NULL, 0, NULL, 0,
870 host, sizeof(host), &port, path, sizeof(path), s->filename);
872 port = RTSP_DEFAULT_PORT;
874 /* open the tcp connexion */
875 snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port);
876 if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0)
878 rt->rtsp_hd = rtsp_hd;
881 /* describe the stream */
882 snprintf(cmd, sizeof(cmd),
883 "DESCRIBE %s RTSP/1.0\r\n"
884 "Accept: application/sdp\r\n",
886 rtsp_send_cmd(s, cmd, reply, &content);
888 err = AVERROR_INVALIDDATA;
891 if (reply->status_code != RTSP_STATUS_OK) {
892 err = AVERROR_INVALIDDATA;
896 /* now we got the SDP description, we parse it */
897 ret = sdp_parse(s, (const char *)content);
900 err = AVERROR_INVALIDDATA;
904 protocol_mask = rtsp_default_protocols;
906 /* for each stream, make the setup request */
907 /* XXX: we assume the same server is used for the control of each
910 for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) {
911 char transport[2048];
913 rtsp_st = rt->rtsp_streams[i];
915 /* compute available transports */
919 if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) {
922 /* first try in specified port range */
923 if (RTSP_RTP_PORT_MIN != 0) {
924 while(j <= RTSP_RTP_PORT_MAX) {
925 snprintf(buf, sizeof(buf), "rtp://?localport=%d", j);
926 if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) {
927 j += 2; /* we will use two port by rtp stream (rtp and rtcp) */
933 /* then try on any port
934 ** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
935 ** err = AVERROR_INVALIDDATA;
941 port = rtp_get_local_port(rtsp_st->rtp_handle);
942 if (transport[0] != '\0')
943 pstrcat(transport, sizeof(transport), ",");
944 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
945 "RTP/AVP/UDP;unicast;client_port=%d-%d",
950 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) {
951 if (transport[0] != '\0')
952 pstrcat(transport, sizeof(transport), ",");
953 snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1,
957 else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) {
958 if (transport[0] != '\0')
959 pstrcat(transport, sizeof(transport), ",");
960 snprintf(transport + strlen(transport),
961 sizeof(transport) - strlen(transport) - 1,
962 "RTP/AVP/UDP;multicast");
964 snprintf(cmd, sizeof(cmd),
965 "SETUP %s RTSP/1.0\r\n"
967 rtsp_st->control_url, transport);
968 rtsp_send_cmd(s, cmd, reply, NULL);
969 if (reply->status_code != RTSP_STATUS_OK ||
970 reply->nb_transports != 1) {
971 err = AVERROR_INVALIDDATA;
975 /* XXX: same protocol for all streams is required */
977 if (reply->transports[0].protocol != rt->protocol) {
978 err = AVERROR_INVALIDDATA;
982 rt->protocol = reply->transports[0].protocol;
985 /* close RTP connection if not choosen */
986 if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP &&
987 (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
988 url_close(rtsp_st->rtp_handle);
989 rtsp_st->rtp_handle = NULL;
992 switch(reply->transports[0].protocol) {
993 case RTSP_PROTOCOL_RTP_TCP:
994 rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
995 rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
998 case RTSP_PROTOCOL_RTP_UDP:
1002 /* XXX: also use address if specified */
1003 snprintf(url, sizeof(url), "rtp://%s:%d",
1004 host, reply->transports[0].server_port_min);
1005 if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) {
1006 err = AVERROR_INVALIDDATA;
1011 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1016 ttl = reply->transports[0].ttl;
1019 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1021 reply->transports[0].server_port_min,
1023 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1024 err = AVERROR_INVALIDDATA;
1030 /* open the RTP context */
1032 if (rtsp_st->stream_index >= 0)
1033 st = s->streams[rtsp_st->stream_index];
1035 s->ctx_flags |= AVFMTCTX_NOHEADER;
1036 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1038 if (!rtsp_st->rtp_ctx) {
1039 err = AVERROR_NOMEM;
1042 if(rtsp_st->dynamic_handler) {
1043 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1044 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1049 /* use callback if available to extend setup */
1050 if (ff_rtsp_callback) {
1051 if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
1052 NULL, 0, rt->last_reply) < 0) {
1053 err = AVERROR_INVALIDDATA;
1059 rt->state = RTSP_STATE_IDLE;
1060 rt->seek_timestamp = 0; /* default is to start stream at position
1062 if (ap->initial_pause) {
1063 /* do not start immediately */
1065 if (rtsp_read_play(s) < 0) {
1066 err = AVERROR_INVALIDDATA;
1072 rtsp_close_streams(rt);
1074 url_close(rt->rtsp_hd);
1078 static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1079 uint8_t *buf, int buf_size)
1081 RTSPState *rt = s->priv_data;
1082 int id, len, i, ret;
1083 RTSPStream *rtsp_st;
1085 #ifdef DEBUG_RTP_TCP
1086 printf("tcp_read_packet:\n");
1090 ret = url_readbuf(rt->rtsp_hd, buf, 1);
1091 #ifdef DEBUG_RTP_TCP
1092 printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]);
1099 ret = url_readbuf(rt->rtsp_hd, buf, 3);
1103 len = (buf[1] << 8) | buf[2];
1104 #ifdef DEBUG_RTP_TCP
1105 printf("id=%d len=%d\n", id, len);
1107 if (len > buf_size || len < 12)
1110 ret = url_readbuf(rt->rtsp_hd, buf, len);
1114 /* find the matching stream */
1115 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1116 rtsp_st = rt->rtsp_streams[i];
1117 if (id >= rtsp_st->interleaved_min &&
1118 id <= rtsp_st->interleaved_max)
1123 *prtsp_st = rtsp_st;
1127 static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st,
1128 uint8_t *buf, int buf_size)
1130 RTSPState *rt = s->priv_data;
1131 RTSPStream *rtsp_st;
1133 int fd1, fd2, fd_max, n, i, ret;
1137 if (url_interrupt_cb())
1141 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1142 rtsp_st = rt->rtsp_streams[i];
1143 /* currently, we cannot probe RTCP handle because of blocking restrictions */
1144 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1150 tv.tv_usec = 100 * 1000;
1151 n = select(fd_max + 1, &rfds, NULL, NULL, &tv);
1153 for(i = 0; i < rt->nb_rtsp_streams; i++) {
1154 rtsp_st = rt->rtsp_streams[i];
1155 rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2);
1156 if (FD_ISSET(fd1, &rfds)) {
1157 ret = url_read(rtsp_st->rtp_handle, buf, buf_size);
1159 *prtsp_st = rtsp_st;
1168 static int rtsp_read_packet(AVFormatContext *s,
1171 RTSPState *rt = s->priv_data;
1172 RTSPStream *rtsp_st;
1174 uint8_t buf[RTP_MAX_PACKET_LENGTH];
1176 /* get next frames from the same RTP packet */
1178 ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0);
1182 } else if (ret == 1) {
1189 /* read next RTP packet */
1191 switch(rt->protocol) {
1193 case RTSP_PROTOCOL_RTP_TCP:
1194 len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1196 case RTSP_PROTOCOL_RTP_UDP:
1197 case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
1198 len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
1199 if (rtsp_st->rtp_ctx)
1200 rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len);
1205 ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len);
1209 /* more packets may follow, so we save the RTP context */
1210 rt->cur_rtp = rtsp_st->rtp_ctx;
1215 static int rtsp_read_play(AVFormatContext *s)
1217 RTSPState *rt = s->priv_data;
1218 RTSPHeader reply1, *reply = &reply1;
1221 av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
1223 if (rt->state == RTSP_STATE_PAUSED) {
1224 snprintf(cmd, sizeof(cmd),
1225 "PLAY %s RTSP/1.0\r\n",
1228 snprintf(cmd, sizeof(cmd),
1229 "PLAY %s RTSP/1.0\r\n"
1230 "Range: npt=%0.3f-\r\n",
1232 (double)rt->seek_timestamp / AV_TIME_BASE);
1234 rtsp_send_cmd(s, cmd, reply, NULL);
1235 if (reply->status_code != RTSP_STATUS_OK) {
1238 rt->state = RTSP_STATE_PLAYING;
1243 /* pause the stream */
1244 static int rtsp_read_pause(AVFormatContext *s)
1246 RTSPState *rt = s->priv_data;
1247 RTSPHeader reply1, *reply = &reply1;
1252 if (rt->state != RTSP_STATE_PLAYING)
1255 snprintf(cmd, sizeof(cmd),
1256 "PAUSE %s RTSP/1.0\r\n",
1258 rtsp_send_cmd(s, cmd, reply, NULL);
1259 if (reply->status_code != RTSP_STATUS_OK) {
1262 rt->state = RTSP_STATE_PAUSED;
1267 static int rtsp_read_seek(AVFormatContext *s, int stream_index,
1268 int64_t timestamp, int flags)
1270 RTSPState *rt = s->priv_data;
1272 rt->seek_timestamp = timestamp;
1275 case RTSP_STATE_IDLE:
1277 case RTSP_STATE_PLAYING:
1278 if (rtsp_read_play(s) != 0)
1281 case RTSP_STATE_PAUSED:
1282 rt->state = RTSP_STATE_IDLE;
1288 static int rtsp_read_close(AVFormatContext *s)
1290 RTSPState *rt = s->priv_data;
1291 RTSPHeader reply1, *reply = &reply1;
1295 /* NOTE: it is valid to flush the buffer here */
1296 if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
1297 url_fclose(&rt->rtsp_gb);
1300 snprintf(cmd, sizeof(cmd),
1301 "TEARDOWN %s RTSP/1.0\r\n",
1303 rtsp_send_cmd(s, cmd, reply, NULL);
1305 if (ff_rtsp_callback) {
1306 ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id,
1310 rtsp_close_streams(rt);
1311 url_close(rt->rtsp_hd);
1315 AVInputFormat rtsp_demuxer = {
1317 "RTSP input format",
1324 .flags = AVFMT_NOFILE,
1325 .read_play = rtsp_read_play,
1326 .read_pause = rtsp_read_pause,
1329 static int sdp_probe(AVProbeData *p1)
1331 const char *p = p1->buf, *p_end = p1->buf + p1->buf_size;
1333 /* we look for a line beginning "c=IN IP4" */
1334 while (p < p_end && *p != '\0') {
1335 if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL))
1336 return AVPROBE_SCORE_MAX / 2;
1338 while(p < p_end - 1 && *p != '\n') p++;
1347 #define SDP_MAX_SIZE 8192
1349 static int sdp_read_header(AVFormatContext *s,
1350 AVFormatParameters *ap)
1352 RTSPState *rt = s->priv_data;
1353 RTSPStream *rtsp_st;
1359 /* read the whole sdp file */
1360 /* XXX: better loading */
1361 content = av_malloc(SDP_MAX_SIZE);
1362 size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
1365 return AVERROR_INVALIDDATA;
1367 content[size] ='\0';
1369 sdp_parse(s, content);
1372 /* open each RTP stream */
1373 for(i=0;i<rt->nb_rtsp_streams;i++) {
1374 rtsp_st = rt->rtsp_streams[i];
1376 snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d",
1377 inet_ntoa(rtsp_st->sdp_ip),
1380 if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) {
1381 err = AVERROR_INVALIDDATA;
1384 /* open the RTP context */
1386 if (rtsp_st->stream_index >= 0)
1387 st = s->streams[rtsp_st->stream_index];
1389 s->ctx_flags |= AVFMTCTX_NOHEADER;
1390 rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data);
1391 if (!rtsp_st->rtp_ctx) {
1392 err = AVERROR_NOMEM;
1395 if(rtsp_st->dynamic_handler) {
1396 rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context;
1397 rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet;
1403 rtsp_close_streams(rt);
1407 static int sdp_read_packet(AVFormatContext *s,
1410 return rtsp_read_packet(s, pkt);
1413 static int sdp_read_close(AVFormatContext *s)
1415 RTSPState *rt = s->priv_data;
1416 rtsp_close_streams(rt);
1420 #ifdef CONFIG_SDP_DEMUXER
1421 AVInputFormat sdp_demuxer = {
1432 /* dummy redirector format (used directly in av_open_input_file now) */
1433 static int redir_probe(AVProbeData *pd)
1437 while (redir_isspace(*p))
1439 if (strstart(p, "http://", NULL) ||
1440 strstart(p, "rtsp://", NULL))
1441 return AVPROBE_SCORE_MAX;
1445 /* called from utils.c */
1446 int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
1450 AVFormatContext *ic = NULL;
1452 /* parse each URL and try to open it */
1454 while (c != URL_EOF) {
1457 if (!redir_isspace(c))
1466 if (c == URL_EOF || redir_isspace(c))
1468 if ((q - buf) < sizeof(buf) - 1)
1473 //printf("URL='%s'\n", buf);
1474 /* try to open the media file */
1475 if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0)
1485 AVInputFormat redir_demuxer = {
1487 "Redirector format",