1 /*****************************************************************************
2 * rtp.c: rtp stream output module
3 *****************************************************************************
4 * Copyright (C) 2003-2004, 2010 the VideoLAN team
5 * Copyright © 2007-2008 Rémi Denis-Courmont
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
33 #include <vlc_common.h>
34 #include <vlc_plugin.h>
36 #include <vlc_block.h>
38 #include <vlc_httpd.h>
40 #include <vlc_network.h>
50 # include <sys/types.h>
53 #ifdef HAVE_ARPA_INET_H
54 # include <arpa/inet.h>
56 #ifdef HAVE_LINUX_DCCP_H
57 # include <linux/dccp.h>
60 # define IPPROTO_DCCP 33
62 #ifndef IPPROTO_UDPLITE
63 # define IPPROTO_UDPLITE 136
70 /*****************************************************************************
72 *****************************************************************************/
74 #define DEST_TEXT N_("Destination")
75 #define DEST_LONGTEXT N_( \
76 "This is the output URL that will be used." )
77 #define SDP_TEXT N_("SDP")
78 #define SDP_LONGTEXT N_( \
79 "This allows you to specify how the SDP (Session Descriptor) for this RTP "\
80 "session will be made available. You must use a url: http://location to " \
81 "access the SDP via HTTP, rtsp://location for RTSP access, and sap:// " \
82 "for the SDP to be announced via SAP." )
83 #define SAP_TEXT N_("SAP announcing")
84 #define SAP_LONGTEXT N_("Announce this session with SAP.")
85 #define MUX_TEXT N_("Muxer")
86 #define MUX_LONGTEXT N_( \
87 "This allows you to specify the muxer used for the streaming output. " \
88 "Default is to use no muxer (standard RTP stream)." )
90 #define NAME_TEXT N_("Session name")
91 #define NAME_LONGTEXT N_( \
92 "This is the name of the session that will be announced in the SDP " \
93 "(Session Descriptor)." )
94 #define DESC_TEXT N_("Session description")
95 #define DESC_LONGTEXT N_( \
96 "This allows you to give a short description with details about the stream, " \
97 "that will be announced in the SDP (Session Descriptor)." )
98 #define URL_TEXT N_("Session URL")
99 #define URL_LONGTEXT N_( \
100 "This allows you to give a URL with more details about the stream " \
101 "(often the website of the streaming organization), that will " \
102 "be announced in the SDP (Session Descriptor)." )
103 #define EMAIL_TEXT N_("Session email")
104 #define EMAIL_LONGTEXT N_( \
105 "This allows you to give a contact mail address for the stream, that will " \
106 "be announced in the SDP (Session Descriptor)." )
107 #define PHONE_TEXT N_("Session phone number")
108 #define PHONE_LONGTEXT N_( \
109 "This allows you to give a contact telephone number for the stream, that will " \
110 "be announced in the SDP (Session Descriptor)." )
112 #define PORT_TEXT N_("Port")
113 #define PORT_LONGTEXT N_( \
114 "This allows you to specify the base port for the RTP streaming." )
115 #define PORT_AUDIO_TEXT N_("Audio port")
116 #define PORT_AUDIO_LONGTEXT N_( \
117 "This allows you to specify the default audio port for the RTP streaming." )
118 #define PORT_VIDEO_TEXT N_("Video port")
119 #define PORT_VIDEO_LONGTEXT N_( \
120 "This allows you to specify the default video port for the RTP streaming." )
122 #define TTL_TEXT N_("Hop limit (TTL)")
123 #define TTL_LONGTEXT N_( \
124 "This is the hop limit (also known as \"Time-To-Live\" or TTL) of " \
125 "the multicast packets sent by the stream output (-1 = use operating " \
126 "system built-in default).")
128 #define RTCP_MUX_TEXT N_("RTP/RTCP multiplexing")
129 #define RTCP_MUX_LONGTEXT N_( \
130 "This sends and receives RTCP packet multiplexed over the same port " \
133 #define CACHING_TEXT N_("Caching value (ms)")
134 #define CACHING_LONGTEXT N_( \
135 "Default caching value for outbound RTP streams. This " \
136 "value should be set in milliseconds." )
138 #define PROTO_TEXT N_("Transport protocol")
139 #define PROTO_LONGTEXT N_( \
140 "This selects which transport protocol to use for RTP." )
142 #define SRTP_KEY_TEXT N_("SRTP key (hexadecimal)")
143 #define SRTP_KEY_LONGTEXT N_( \
144 "RTP packets will be integrity-protected and ciphered "\
145 "with this Secure RTP master shared secret key.")
147 #define SRTP_SALT_TEXT N_("SRTP salt (hexadecimal)")
148 #define SRTP_SALT_LONGTEXT N_( \
149 "Secure RTP requires a (non-secret) master salt value.")
151 static const char *const ppsz_protos[] = {
152 "dccp", "sctp", "tcp", "udp", "udplite",
155 static const char *const ppsz_protocols[] = {
156 "DCCP", "SCTP", "TCP", "UDP", "UDP-Lite",
159 #define RFC3016_TEXT N_("MP4A LATM")
160 #define RFC3016_LONGTEXT N_( \
161 "This allows you to stream MPEG4 LATM audio streams (see RFC3016)." )
163 #define RTSP_HOST_TEXT N_( "RTSP host address" )
164 #define RTSP_HOST_LONGTEXT N_( \
165 "This defines the address, port and path the RTSP VOD server will listen " \
166 "on.\nSyntax is address:port/path. The default is to listen on all "\
167 "interfaces (address 0.0.0.0), on port 554, with no path.\nTo listen " \
168 "only on the local interface, use \"localhost\" as address." )
170 #define RTSP_TIMEOUT_TEXT N_( "RTSP session timeout (s)" )
171 #define RTSP_TIMEOUT_LONGTEXT N_( "RTSP sessions will be closed after " \
172 "not receiving any RTSP request for this long. Setting it to a " \
173 "negative value or zero disables timeouts. The default is 60 (one " \
176 static int Open ( vlc_object_t * );
177 static void Close( vlc_object_t * );
179 #define SOUT_CFG_PREFIX "sout-rtp-"
180 #define MAX_EMPTY_BLOCKS 200
183 set_shortname( N_("RTP"))
184 set_description( N_("RTP stream output") )
185 set_capability( "sout stream", 0 )
186 add_shortcut( "rtp", "vod" )
187 set_category( CAT_SOUT )
188 set_subcategory( SUBCAT_SOUT_STREAM )
190 add_string( SOUT_CFG_PREFIX "dst", "", DEST_TEXT,
191 DEST_LONGTEXT, true )
192 add_string( SOUT_CFG_PREFIX "sdp", "", SDP_TEXT,
194 add_string( SOUT_CFG_PREFIX "mux", "", MUX_TEXT,
196 add_bool( SOUT_CFG_PREFIX "sap", false, SAP_TEXT, SAP_LONGTEXT,
199 add_string( SOUT_CFG_PREFIX "name", "", NAME_TEXT,
200 NAME_LONGTEXT, true )
201 add_string( SOUT_CFG_PREFIX "description", "", DESC_TEXT,
202 DESC_LONGTEXT, true )
203 add_string( SOUT_CFG_PREFIX "url", "", URL_TEXT,
205 add_string( SOUT_CFG_PREFIX "email", "", EMAIL_TEXT,
206 EMAIL_LONGTEXT, true )
207 add_string( SOUT_CFG_PREFIX "phone", "", PHONE_TEXT,
208 PHONE_LONGTEXT, true )
210 add_string( SOUT_CFG_PREFIX "proto", "udp", PROTO_TEXT,
211 PROTO_LONGTEXT, false )
212 change_string_list( ppsz_protos, ppsz_protocols, NULL )
213 add_integer( SOUT_CFG_PREFIX "port", 5004, PORT_TEXT,
214 PORT_LONGTEXT, true )
215 add_integer( SOUT_CFG_PREFIX "port-audio", 0, PORT_AUDIO_TEXT,
216 PORT_AUDIO_LONGTEXT, true )
217 add_integer( SOUT_CFG_PREFIX "port-video", 0, PORT_VIDEO_TEXT,
218 PORT_VIDEO_LONGTEXT, true )
220 add_integer( SOUT_CFG_PREFIX "ttl", -1, TTL_TEXT,
222 add_bool( SOUT_CFG_PREFIX "rtcp-mux", false,
223 RTCP_MUX_TEXT, RTCP_MUX_LONGTEXT, false )
224 add_integer( SOUT_CFG_PREFIX "caching", DEFAULT_PTS_DELAY / 1000,
225 CACHING_TEXT, CACHING_LONGTEXT, true )
228 add_string( SOUT_CFG_PREFIX "key", "",
229 SRTP_KEY_TEXT, SRTP_KEY_LONGTEXT, false )
230 add_string( SOUT_CFG_PREFIX "salt", "",
231 SRTP_SALT_TEXT, SRTP_SALT_LONGTEXT, false )
234 add_bool( SOUT_CFG_PREFIX "mp4a-latm", false, RFC3016_TEXT,
235 RFC3016_LONGTEXT, false )
237 set_callbacks( Open, Close )
240 set_shortname( N_("RTSP VoD" ) )
241 set_description( N_("RTSP VoD server") )
242 set_category( CAT_SOUT )
243 set_subcategory( SUBCAT_SOUT_VOD )
244 set_capability( "vod server", 10 )
245 set_callbacks( OpenVoD, CloseVoD )
246 add_shortcut( "rtsp" )
247 add_string ( "rtsp-host", NULL, RTSP_HOST_TEXT,
248 RTSP_HOST_LONGTEXT, true )
249 add_integer( "rtsp-timeout", 60, RTSP_TIMEOUT_TEXT,
250 RTSP_TIMEOUT_LONGTEXT, true )
254 /*****************************************************************************
255 * Exported prototypes
256 *****************************************************************************/
257 static const char *const ppsz_sout_options[] = {
258 "dst", "name", "port", "port-audio", "port-video", "*sdp", "ttl", "mux",
259 "sap", "description", "url", "email", "phone",
260 "proto", "rtcp-mux", "caching", "key", "salt",
264 static sout_stream_id_t *Add ( sout_stream_t *, es_format_t * );
265 static int Del ( sout_stream_t *, sout_stream_id_t * );
266 static int Send( sout_stream_t *, sout_stream_id_t *,
268 static sout_stream_id_t *MuxAdd ( sout_stream_t *, es_format_t * );
269 static int MuxDel ( sout_stream_t *, sout_stream_id_t * );
270 static int MuxSend( sout_stream_t *, sout_stream_id_t *,
273 static sout_access_out_t *GrabberCreate( sout_stream_t *p_sout );
274 static void* ThreadSend( void * );
275 static void *rtp_listen_thread( void * );
277 static void SDPHandleUrl( sout_stream_t *, const char * );
279 static int SapSetup( sout_stream_t *p_stream );
280 static int FileSetup( sout_stream_t *p_stream );
281 static int HttpSetup( sout_stream_t *p_stream, const vlc_url_t * );
283 static int64_t rtp_init_ts( const vod_media_t *p_media,
284 const char *psz_vod_session );
286 struct sout_stream_sys_t
290 vlc_mutex_t lock_sdp;
297 session_descriptor_t *p_session;
300 httpd_host_t *p_httpd_host;
301 httpd_file_t *p_httpd_file;
306 /* RTSP NPT and timestamp computations */
307 mtime_t i_npt_zero; /* when NPT=0 packet is sent */
308 int64_t i_pts_zero; /* predicts PTS of NPT=0 packet */
309 int64_t i_pts_offset; /* matches actual PTS to prediction */
313 char *psz_destination;
315 uint16_t i_port_audio;
316 uint16_t i_port_video;
322 vod_media_t *p_vod_media;
323 char *psz_vod_session;
325 /* in case we do TS/PS over rtp */
327 sout_access_out_t *p_grab;
333 sout_stream_id_t **es;
336 typedef struct rtp_sink_t
342 struct sout_stream_id_t
344 sout_stream_t *p_stream;
349 uint32_t i_ts_offset;
353 uint16_t i_seq_sent_next;
356 rtp_format_t rtp_fmt;
359 /* Packetizer specific fields */
362 srtp_session_t *srtp;
367 vlc_mutex_t lock_sink;
370 rtsp_stream_id_t *rtsp_id;
376 block_fifo_t *p_fifo;
380 /*****************************************************************************
382 *****************************************************************************/
383 static int Open( vlc_object_t *p_this )
385 sout_stream_t *p_stream = (sout_stream_t*)p_this;
386 sout_instance_t *p_sout = p_stream->p_sout;
387 sout_stream_sys_t *p_sys = NULL;
388 config_chain_t *p_cfg = NULL;
392 config_ChainParse( p_stream, SOUT_CFG_PREFIX,
393 ppsz_sout_options, p_stream->p_cfg );
395 p_sys = malloc( sizeof( sout_stream_sys_t ) );
399 p_sys->psz_destination = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "dst" );
401 p_sys->i_port = var_GetInteger( p_stream, SOUT_CFG_PREFIX "port" );
402 p_sys->i_port_audio = var_GetInteger( p_stream, SOUT_CFG_PREFIX "port-audio" );
403 p_sys->i_port_video = var_GetInteger( p_stream, SOUT_CFG_PREFIX "port-video" );
404 p_sys->rtcp_mux = var_GetBool( p_stream, SOUT_CFG_PREFIX "rtcp-mux" );
406 if( p_sys->i_port_audio && p_sys->i_port_video == p_sys->i_port_audio )
408 msg_Err( p_stream, "audio and video RTP port must be distinct" );
409 free( p_sys->psz_destination );
414 for( p_cfg = p_stream->p_cfg; p_cfg != NULL; p_cfg = p_cfg->p_next )
416 if( !strcmp( p_cfg->psz_name, "sdp" )
417 && ( p_cfg->psz_value != NULL )
418 && !strncasecmp( p_cfg->psz_value, "rtsp:", 5 ) )
426 psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "sdp" );
429 if( !strncasecmp( psz, "rtsp:", 5 ) )
435 /* Transport protocol */
436 p_sys->proto = IPPROTO_UDP;
437 psz = var_GetNonEmptyString (p_stream, SOUT_CFG_PREFIX"proto");
439 if ((psz == NULL) || !strcasecmp (psz, "udp"))
440 (void)0; /* default */
442 if (!strcasecmp (psz, "dccp"))
444 p_sys->proto = IPPROTO_DCCP;
445 p_sys->rtcp_mux = true; /* Force RTP/RTCP mux */
449 if (!strcasecmp (psz, "sctp"))
451 p_sys->proto = IPPROTO_TCP;
452 p_sys->rtcp_mux = true; /* Force RTP/RTCP mux */
457 if (!strcasecmp (psz, "tcp"))
459 p_sys->proto = IPPROTO_TCP;
460 p_sys->rtcp_mux = true; /* Force RTP/RTCP mux */
464 if (!strcasecmp (psz, "udplite") || !strcasecmp (psz, "udp-lite"))
465 p_sys->proto = IPPROTO_UDPLITE;
467 msg_Warn (p_this, "unknown or unsupported transport protocol \"%s\"",
470 var_Create (p_this, "dccp-service", VLC_VAR_STRING);
472 p_sys->p_vod_media = NULL;
473 p_sys->psz_vod_session = NULL;
475 if (! strcmp(p_stream->psz_name, "vod"))
477 /* The VLM stops all instances before deleting a media, so this
478 * reference will remain valid during the lifetime of the rtp
480 p_sys->p_vod_media = var_InheritAddress(p_stream, "vod-media");
482 if (p_sys->p_vod_media != NULL)
484 p_sys->psz_vod_session = var_InheritString(p_stream, "vod-session");
485 if (p_sys->psz_vod_session == NULL)
487 msg_Err(p_stream, "missing VoD session");
492 const char *mux = vod_get_mux(p_sys->p_vod_media);
493 var_SetString(p_stream, SOUT_CFG_PREFIX "mux", mux);
497 if( p_sys->psz_destination == NULL && !b_rtsp
498 && p_sys->p_vod_media == NULL )
500 msg_Err( p_stream, "missing destination and not in RTSP mode" );
505 int i_ttl = var_GetInteger( p_stream, SOUT_CFG_PREFIX "ttl" );
508 var_Create( p_stream, "ttl", VLC_VAR_INTEGER );
509 var_SetInteger( p_stream, "ttl", i_ttl );
512 p_sys->b_latm = var_GetBool( p_stream, SOUT_CFG_PREFIX "mp4a-latm" );
514 /* NPT=0 time will be determined when we packetize the first packet
515 * (of any ES). But we want to be able to report rtptime in RTSP
516 * without waiting (and already did in the VoD case). So until then,
517 * we use an arbitrary reference PTS for timestamp computations, and
518 * then actual PTS will catch up using offsets. */
519 p_sys->i_npt_zero = VLC_TS_INVALID;
520 p_sys->i_pts_zero = rtp_init_ts(p_sys->p_vod_media,
521 p_sys->psz_vod_session);
525 p_sys->psz_sdp = NULL;
527 p_sys->b_export_sap = false;
528 p_sys->p_session = NULL;
529 p_sys->psz_sdp_file = NULL;
531 p_sys->p_httpd_host = NULL;
532 p_sys->p_httpd_file = NULL;
534 p_stream->p_sys = p_sys;
536 vlc_mutex_init( &p_sys->lock_sdp );
537 vlc_mutex_init( &p_sys->lock_ts );
538 vlc_mutex_init( &p_sys->lock_es );
540 psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "mux" );
543 /* Check muxer type */
544 if( strncasecmp( psz, "ps", 2 )
545 && strncasecmp( psz, "mpeg1", 5 )
546 && strncasecmp( psz, "ts", 2 ) )
548 msg_Err( p_stream, "unsupported muxer type for RTP (only TS/PS)" );
550 vlc_mutex_destroy( &p_sys->lock_sdp );
551 vlc_mutex_destroy( &p_sys->lock_ts );
552 vlc_mutex_destroy( &p_sys->lock_es );
553 free( p_sys->psz_vod_session );
554 free( p_sys->psz_destination );
559 p_sys->p_grab = GrabberCreate( p_stream );
560 p_sys->p_mux = sout_MuxNew( p_sout, psz, p_sys->p_grab );
563 if( p_sys->p_mux == NULL )
565 msg_Err( p_stream, "cannot create muxer" );
566 sout_AccessOutDelete( p_sys->p_grab );
567 vlc_mutex_destroy( &p_sys->lock_sdp );
568 vlc_mutex_destroy( &p_sys->lock_ts );
569 vlc_mutex_destroy( &p_sys->lock_es );
570 free( p_sys->psz_vod_session );
571 free( p_sys->psz_destination );
576 p_sys->packet = NULL;
578 p_stream->pf_add = MuxAdd;
579 p_stream->pf_del = MuxDel;
580 p_stream->pf_send = MuxSend;
585 p_sys->p_grab = NULL;
587 p_stream->pf_add = Add;
588 p_stream->pf_del = Del;
589 p_stream->pf_send = Send;
592 if( var_GetBool( p_stream, SOUT_CFG_PREFIX"sap" ) )
593 SDPHandleUrl( p_stream, "sap" );
595 psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "sdp" );
598 config_chain_t *p_cfg;
600 SDPHandleUrl( p_stream, psz );
602 for( p_cfg = p_stream->p_cfg; p_cfg != NULL; p_cfg = p_cfg->p_next )
604 if( !strcmp( p_cfg->psz_name, "sdp" ) )
606 if( p_cfg->psz_value == NULL || *p_cfg->psz_value == '\0' )
609 /* needed both :sout-rtp-sdp= and rtp{sdp=} can be used */
610 if( !strcmp( p_cfg->psz_value, psz ) )
613 SDPHandleUrl( p_stream, p_cfg->psz_value );
619 /* update p_sout->i_out_pace_nocontrol */
620 p_stream->p_sout->i_out_pace_nocontrol++;
622 if( p_sys->p_mux != NULL )
624 sout_stream_id_t *id = Add( p_stream, NULL );
635 /*****************************************************************************
637 *****************************************************************************/
638 static void Close( vlc_object_t * p_this )
640 sout_stream_t *p_stream = (sout_stream_t*)p_this;
641 sout_stream_sys_t *p_sys = p_stream->p_sys;
643 /* update p_sout->i_out_pace_nocontrol */
644 p_stream->p_sout->i_out_pace_nocontrol--;
648 assert( p_sys->i_es <= 1 );
650 sout_MuxDelete( p_sys->p_mux );
651 if ( p_sys->i_es > 0 )
652 Del( p_stream, p_sys->es[0] );
653 sout_AccessOutDelete( p_sys->p_grab );
657 block_Release( p_sys->packet );
661 if( p_sys->rtsp != NULL )
662 RtspUnsetup( p_sys->rtsp );
664 vlc_mutex_destroy( &p_sys->lock_sdp );
665 vlc_mutex_destroy( &p_sys->lock_ts );
666 vlc_mutex_destroy( &p_sys->lock_es );
668 if( p_sys->p_httpd_file )
669 httpd_FileDelete( p_sys->p_httpd_file );
671 if( p_sys->p_httpd_host )
672 httpd_HostDelete( p_sys->p_httpd_host );
674 free( p_sys->psz_sdp );
676 if( p_sys->psz_sdp_file != NULL )
679 unlink( p_sys->psz_sdp_file );
681 free( p_sys->psz_sdp_file );
683 free( p_sys->psz_vod_session );
684 free( p_sys->psz_destination );
688 /*****************************************************************************
690 *****************************************************************************/
691 static void SDPHandleUrl( sout_stream_t *p_stream, const char *psz_url )
693 sout_stream_sys_t *p_sys = p_stream->p_sys;
696 vlc_UrlParse( &url, psz_url, 0 );
697 if( url.psz_protocol && !strcasecmp( url.psz_protocol, "http" ) )
699 if( p_sys->p_httpd_file )
701 msg_Err( p_stream, "you can use sdp=http:// only once" );
705 if( HttpSetup( p_stream, &url ) )
707 msg_Err( p_stream, "cannot export SDP as HTTP" );
710 else if( url.psz_protocol && !strcasecmp( url.psz_protocol, "rtsp" ) )
712 if( p_sys->rtsp != NULL )
714 msg_Err( p_stream, "you can use sdp=rtsp:// only once" );
718 p_sys->rtsp = RtspSetup( VLC_OBJECT(p_stream), NULL, &url );
719 if( p_sys->rtsp == NULL )
720 msg_Err( p_stream, "cannot export SDP as RTSP" );
722 else if( ( url.psz_protocol && !strcasecmp( url.psz_protocol, "sap" ) ) ||
723 ( url.psz_host && !strcasecmp( url.psz_host, "sap" ) ) )
725 p_sys->b_export_sap = true;
726 SapSetup( p_stream );
728 else if( url.psz_protocol && !strcasecmp( url.psz_protocol, "file" ) )
730 if( p_sys->psz_sdp_file != NULL )
732 msg_Err( p_stream, "you can use sdp=file:// only once" );
735 p_sys->psz_sdp_file = make_path( psz_url );
736 if( p_sys->psz_sdp_file == NULL )
738 FileSetup( p_stream );
742 msg_Warn( p_stream, "unknown protocol for SDP (%s)",
747 vlc_UrlClean( &url );
750 /*****************************************************************************
752 *****************************************************************************/
754 char *SDPGenerate( sout_stream_t *p_stream, const char *rtsp_url )
756 sout_stream_sys_t *p_sys = p_stream->p_sys;
757 char *psz_sdp = NULL;
758 struct sockaddr_storage dst;
762 * When we have a fixed destination (typically when we do multicast),
763 * we need to put the actual port numbers in the SDP.
764 * When there is no fixed destination, we only support RTSP unicast
765 * on-demand setup, so we should rather let the clients decide which ports
767 * When there is both a fixed destination and RTSP unicast, we need to
768 * put port numbers used by the fixed destination, otherwise the SDP would
769 * become totally incorrect for multicast use. It should be noted that
770 * port numbers from SDP with RTSP are only "recommendation" from the
771 * server to the clients (per RFC2326), so only broken clients will fail
772 * to handle this properly. There is no solution but to use two differents
773 * output chain with two different RTSP URLs if you need to handle this
778 vlc_mutex_lock( &p_sys->lock_es );
779 if( unlikely(p_sys->i_es == 0 || (rtsp_url != NULL && !p_sys->es[0]->rtsp_id)) )
780 goto out; /* hmm... */
782 if( p_sys->psz_destination != NULL )
786 /* Oh boy, this is really ugly! */
787 dstlen = sizeof( dst );
788 if( p_sys->es[0]->listen.fd != NULL )
789 getsockname( p_sys->es[0]->listen.fd[0],
790 (struct sockaddr *)&dst, &dstlen );
792 getpeername( p_sys->es[0]->sinkv[0].rtp_fd,
793 (struct sockaddr *)&dst, &dstlen );
799 /* Check against URL format rtsp://[<ipv6>]:<port>/<path> */
800 bool ipv6 = rtsp_url != NULL && strlen( rtsp_url ) > 7
801 && rtsp_url[7] == '[';
803 /* Dummy destination address for RTSP */
804 dstlen = ipv6 ? sizeof( struct sockaddr_in6 )
805 : sizeof( struct sockaddr_in );
806 memset (&dst, 0, dstlen);
807 dst.ss_family = ipv6 ? AF_INET6 : AF_INET;
813 psz_sdp = vlc_sdp_Start( VLC_OBJECT( p_stream ), SOUT_CFG_PREFIX,
814 NULL, 0, (struct sockaddr *)&dst, dstlen );
815 if( psz_sdp == NULL )
818 /* TODO: a=source-filter */
819 if( p_sys->rtcp_mux )
820 sdp_AddAttribute( &psz_sdp, "rtcp-mux", NULL );
822 if( rtsp_url != NULL )
823 sdp_AddAttribute ( &psz_sdp, "control", "%s", rtsp_url );
825 const char *proto = "RTP/AVP"; /* protocol */
826 if( rtsp_url == NULL )
828 switch( p_sys->proto )
833 proto = "TCP/RTP/AVP";
836 proto = "DCCP/RTP/AVP";
838 case IPPROTO_UDPLITE:
843 for( i = 0; i < p_sys->i_es; i++ )
845 sout_stream_id_t *id = p_sys->es[i];
846 rtp_format_t *rtp_fmt = &id->rtp_fmt;
847 const char *mime_major; /* major MIME type */
849 switch( rtp_fmt->cat )
852 mime_major = "video";
855 mime_major = "audio";
864 sdp_AddMedia( &psz_sdp, mime_major, proto, inclport * id->i_port,
865 rtp_fmt->payload_type, false, rtp_fmt->bitrate,
866 rtp_fmt->ptname, rtp_fmt->clock_rate, rtp_fmt->channels,
869 /* cf RFC4566 §5.14 */
870 if( inclport && !p_sys->rtcp_mux && (id->i_port & 1) )
871 sdp_AddAttribute ( &psz_sdp, "rtcp", "%u", id->i_port + 1 );
873 if( rtsp_url != NULL )
875 char *track_url = RtspAppendTrackPath( id->rtsp_id, rtsp_url );
876 if( track_url != NULL )
878 sdp_AddAttribute ( &psz_sdp, "control", "%s", track_url );
884 if( id->listen.fd != NULL )
885 sdp_AddAttribute( &psz_sdp, "setup", "passive" );
886 if( p_sys->proto == IPPROTO_DCCP )
887 sdp_AddAttribute( &psz_sdp, "dccp-service-code",
888 "SC:RTP%c", toupper( mime_major[0] ) );
892 vlc_mutex_unlock( &p_sys->lock_es );
896 /*****************************************************************************
898 *****************************************************************************/
901 * Shrink the MTU down to a fixed packetization time (for audio).
904 rtp_set_ptime (sout_stream_id_t *id, unsigned ptime_ms, size_t bytes)
906 /* Samples per second */
907 size_t spl = (id->rtp_fmt.clock_rate - 1) * ptime_ms / 1000 + 1;
908 bytes *= id->rtp_fmt.channels;
911 if (spl < rtp_mtu (id)) /* MTU is big enough for ptime */
912 id->i_mtu = 12 + spl;
913 else /* MTU is too small for ptime, align to a sample boundary */
914 id->i_mtu = 12 + (((id->i_mtu - 12) / bytes) * bytes);
917 uint32_t rtp_compute_ts( unsigned i_clock_rate, int64_t i_pts )
919 /* NOTE: this plays nice with offsets because the calculations are
921 return i_pts * (int64_t)i_clock_rate / CLOCK_FREQ;
924 /** Add an ES as a new RTP stream */
925 static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
927 /* NOTE: As a special case, if we use a non-RTP
928 * mux (TS/PS), then p_fmt is NULL. */
929 sout_stream_sys_t *p_sys = p_stream->p_sys;
932 sout_stream_id_t *id = malloc( sizeof( *id ) );
933 if( unlikely(id == NULL) )
935 id->p_stream = p_stream;
937 id->i_mtu = var_InheritInteger( p_stream, "mtu" );
938 if( id->i_mtu <= 12 + 16 )
939 id->i_mtu = 576 - 20 - 8; /* pessimistic */
940 msg_Dbg( p_stream, "maximum RTP packet size: %d bytes", id->i_mtu );
945 vlc_mutex_init( &id->lock_sink );
950 id->listen.fd = NULL;
952 id->b_first_packet = true;
954 (int64_t)1000 * var_GetInteger( p_stream, SOUT_CFG_PREFIX "caching");
956 vlc_rand_bytes (&id->i_sequence, sizeof (id->i_sequence));
957 vlc_rand_bytes (id->ssrc, sizeof (id->ssrc));
961 if (p_sys->p_vod_media != NULL)
963 id->rtp_fmt.ptname = NULL;
965 int val = vod_init_id(p_sys->p_vod_media, p_sys->psz_vod_session,
966 p_fmt ? p_fmt->i_id : 0, id, &id->rtp_fmt,
967 &ssrc, &id->i_seq_sent_next);
968 if (val == VLC_SUCCESS)
970 memcpy(id->ssrc, &ssrc, sizeof(id->ssrc));
971 /* This is ugly, but id->i_seq_sent_next needs to be
972 * initialized inside vod_init_id() to avoid race
974 id->i_sequence = id->i_seq_sent_next;
976 /* vod_init_id() may fail either because the ES wasn't found in
977 * the VoD media, or because the RTSP session is gone. In the
978 * former case, id->rtp_fmt was left untouched. */
979 format = (id->rtp_fmt.ptname != NULL);
984 id->rtp_fmt.fmtp = NULL; /* don't free() garbage on error */
985 char *psz = var_GetNonEmptyString( p_stream, SOUT_CFG_PREFIX "mux" );
986 if (p_fmt == NULL && psz == NULL)
988 int val = rtp_get_fmt(VLC_OBJECT(p_stream), p_fmt, psz, &id->rtp_fmt);
990 if (val != VLC_SUCCESS)
995 char *key = var_GetNonEmptyString (p_stream, SOUT_CFG_PREFIX"key");
998 id->srtp = srtp_create (SRTP_ENCR_AES_CM, SRTP_AUTH_HMAC_SHA1, 10,
999 SRTP_PRF_AES_CM, SRTP_RCC_MODE1);
1000 if (id->srtp == NULL)
1006 char *salt = var_GetNonEmptyString (p_stream, SOUT_CFG_PREFIX"salt");
1007 errno = srtp_setkeystring (id->srtp, key, salt ? salt : "");
1012 msg_Err (p_stream, "bad SRTP key/salt combination (%m)");
1015 id->i_sequence = 0; /* FIXME: awful hack for libvlc_srtp */
1019 id->i_seq_sent_next = id->i_sequence;
1022 if( p_sys->psz_destination != NULL )
1024 /* Choose the port */
1025 uint16_t i_port = 0;
1029 if( p_fmt->i_cat == AUDIO_ES && p_sys->i_port_audio > 0 )
1030 i_port = p_sys->i_port_audio;
1032 if( p_fmt->i_cat == VIDEO_ES && p_sys->i_port_video > 0 )
1033 i_port = p_sys->i_port_video;
1035 /* We do not need the ES lock (p_sys->lock_es) here, because
1036 * this is the only one thread that can *modify* the ES table.
1037 * The ES lock protects the other threads from our modifications
1038 * (TAB_APPEND, TAB_REMOVE). */
1039 for (int i = 0; i_port && (i < p_sys->i_es); i++)
1040 if (i_port == p_sys->es[i]->i_port)
1041 i_port = 0; /* Port already in use! */
1042 for (uint16_t p = p_sys->i_port; i_port == 0; p += 2)
1046 msg_Err (p_stream, "too many RTP elementary streams");
1050 for (int i = 0; i_port && (i < p_sys->i_es); i++)
1051 if (p == p_sys->es[i]->i_port)
1055 id->i_port = i_port;
1057 int type = SOCK_STREAM;
1059 switch( p_sys->proto )
1065 switch (id->rtp_fmt.cat)
1067 case VIDEO_ES: code = "RTPV"; break;
1068 case AUDIO_ES: code = "RTPARTPV"; break;
1069 case SPU_ES: code = "RTPTRTPV"; break;
1070 default: code = "RTPORTPV"; break;
1072 var_SetString (p_stream, "dccp-service", code);
1074 } /* fall through */
1077 id->listen.fd = net_Listen( VLC_OBJECT(p_stream),
1078 p_sys->psz_destination, i_port,
1079 type, p_sys->proto );
1080 if( id->listen.fd == NULL )
1082 msg_Err( p_stream, "passive COMEDIA RTP socket failed" );
1085 if( vlc_clone( &id->listen.thread, rtp_listen_thread, id,
1086 VLC_THREAD_PRIORITY_LOW ) )
1088 net_ListenClose( id->listen.fd );
1089 id->listen.fd = NULL;
1096 int fd = net_ConnectDgram( p_stream, p_sys->psz_destination,
1097 i_port, -1, p_sys->proto );
1100 msg_Err( p_stream, "cannot create RTP socket" );
1103 /* Ignore any unexpected incoming packet (including RTCP-RR
1104 * packets in case of rtcp-mux) */
1105 setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &(int){ 0 },
1107 rtp_add_sink( id, fd, p_sys->rtcp_mux, NULL );
1108 /* FIXME: test if this is multicast */
1115 switch( p_fmt->i_codec )
1117 case VLC_CODEC_MULAW:
1118 case VLC_CODEC_ALAW:
1120 rtp_set_ptime (id, 20, 1);
1122 case VLC_CODEC_S16B:
1123 case VLC_CODEC_S16L:
1124 rtp_set_ptime (id, 20, 2);
1130 #if 0 /* No payload formats sets this at the moment */
1133 cscov += 8 /* UDP */ + 12 /* RTP */;
1135 net_SetCSCov( id->sinkv[0].rtp_fd, cscov, -1 );
1138 vlc_mutex_lock( &p_sys->lock_ts );
1139 id->b_ts_init = ( p_sys->i_npt_zero != VLC_TS_INVALID );
1140 vlc_mutex_unlock( &p_sys->lock_ts );
1142 id->i_ts_offset = rtp_compute_ts( id->rtp_fmt.clock_rate,
1143 p_sys->i_pts_offset );
1145 if( p_sys->rtsp != NULL )
1146 id->rtsp_id = RtspAddId( p_sys->rtsp, id, GetDWBE( id->ssrc ),
1147 id->rtp_fmt.clock_rate, mcast_fd );
1149 id->p_fifo = block_FifoNew();
1150 if( unlikely(id->p_fifo == NULL) )
1152 if( vlc_clone( &id->thread, ThreadSend, id, VLC_THREAD_PRIORITY_HIGHEST ) )
1154 block_FifoRelease( id->p_fifo );
1159 /* Update p_sys context */
1160 vlc_mutex_lock( &p_sys->lock_es );
1161 TAB_APPEND( p_sys->i_es, p_sys->es, id );
1162 vlc_mutex_unlock( &p_sys->lock_es );
1164 psz_sdp = SDPGenerate( p_stream, NULL );
1166 vlc_mutex_lock( &p_sys->lock_sdp );
1167 free( p_sys->psz_sdp );
1168 p_sys->psz_sdp = psz_sdp;
1169 vlc_mutex_unlock( &p_sys->lock_sdp );
1171 msg_Dbg( p_stream, "sdp=\n%s", p_sys->psz_sdp );
1173 /* Update SDP (sap/file) */
1174 if( p_sys->b_export_sap ) SapSetup( p_stream );
1175 if( p_sys->psz_sdp_file != NULL ) FileSetup( p_stream );
1180 Del( p_stream, id );
1184 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
1186 sout_stream_sys_t *p_sys = p_stream->p_sys;
1188 vlc_mutex_lock( &p_sys->lock_es );
1189 TAB_REMOVE( p_sys->i_es, p_sys->es, id );
1190 vlc_mutex_unlock( &p_sys->lock_es );
1192 if( likely(id->p_fifo != NULL) )
1194 vlc_cancel( id->thread );
1195 vlc_join( id->thread, NULL );
1196 block_FifoRelease( id->p_fifo );
1199 free( id->rtp_fmt.fmtp );
1201 if (p_sys->p_vod_media != NULL)
1202 vod_detach_id(p_sys->p_vod_media, p_sys->psz_vod_session, id);
1204 RtspDelId( p_sys->rtsp, id->rtsp_id );
1205 if( id->listen.fd != NULL )
1207 vlc_cancel( id->listen.thread );
1208 vlc_join( id->listen.thread, NULL );
1209 net_ListenClose( id->listen.fd );
1211 /* Delete remaining sinks (incoming connections or explicit
1213 while( id->sinkc > 0 )
1214 rtp_del_sink( id, id->sinkv[0].rtp_fd );
1216 if( id->srtp != NULL )
1217 srtp_destroy( id->srtp );
1220 vlc_mutex_destroy( &id->lock_sink );
1222 /* Update SDP (sap/file) */
1223 if( p_sys->b_export_sap ) SapSetup( p_stream );
1224 if( p_sys->psz_sdp_file != NULL ) FileSetup( p_stream );
1230 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
1235 assert( p_stream->p_sys->p_mux == NULL );
1238 while( p_buffer != NULL )
1240 p_next = p_buffer->p_next;
1242 /* Send a Vorbis/Theora Packed Configuration packet (RFC 5215 §3.1)
1243 * as the first packet of the stream */
1244 if (id->b_first_packet)
1246 id->b_first_packet = false;
1247 if (!strcmp(id->rtp_fmt.ptname, "vorbis") ||
1248 !strcmp(id->rtp_fmt.ptname, "theora"))
1249 rtp_packetize_xiph_config(id, id->rtp_fmt.fmtp,
1253 if( id->rtp_fmt.pf_packetize( id, p_buffer ) )
1256 block_Release( p_buffer );
1262 /****************************************************************************
1264 ****************************************************************************/
1265 static int SapSetup( sout_stream_t *p_stream )
1267 sout_stream_sys_t *p_sys = p_stream->p_sys;
1268 sout_instance_t *p_sout = p_stream->p_sout;
1270 /* Remove the previous session */
1271 if( p_sys->p_session != NULL)
1273 sout_AnnounceUnRegister( p_sout, p_sys->p_session);
1274 p_sys->p_session = NULL;
1277 if( p_sys->i_es > 0 && p_sys->psz_sdp && *p_sys->psz_sdp )
1278 p_sys->p_session = sout_AnnounceRegisterSDP( p_sout,
1280 p_sys->psz_destination );
1285 /****************************************************************************
1287 ****************************************************************************/
1288 static int FileSetup( sout_stream_t *p_stream )
1290 sout_stream_sys_t *p_sys = p_stream->p_sys;
1293 if( p_sys->psz_sdp == NULL )
1294 return VLC_EGENERIC; /* too early */
1296 if( ( f = vlc_fopen( p_sys->psz_sdp_file, "wt" ) ) == NULL )
1298 msg_Err( p_stream, "cannot open file '%s' (%m)",
1299 p_sys->psz_sdp_file );
1300 return VLC_EGENERIC;
1303 fputs( p_sys->psz_sdp, f );
1309 /****************************************************************************
1311 ****************************************************************************/
1312 static int HttpCallback( httpd_file_sys_t *p_args,
1313 httpd_file_t *, uint8_t *p_request,
1314 uint8_t **pp_data, int *pi_data );
1316 static int HttpSetup( sout_stream_t *p_stream, const vlc_url_t *url)
1318 sout_stream_sys_t *p_sys = p_stream->p_sys;
1320 p_sys->p_httpd_host = httpd_HostNew( VLC_OBJECT(p_stream), url->psz_host,
1321 url->i_port > 0 ? url->i_port : 80 );
1322 if( p_sys->p_httpd_host )
1324 p_sys->p_httpd_file = httpd_FileNew( p_sys->p_httpd_host,
1325 url->psz_path ? url->psz_path : "/",
1328 HttpCallback, (void*)p_sys );
1330 if( p_sys->p_httpd_file == NULL )
1332 return VLC_EGENERIC;
1337 static int HttpCallback( httpd_file_sys_t *p_args,
1338 httpd_file_t *f, uint8_t *p_request,
1339 uint8_t **pp_data, int *pi_data )
1341 VLC_UNUSED(f); VLC_UNUSED(p_request);
1342 sout_stream_sys_t *p_sys = (sout_stream_sys_t*)p_args;
1344 vlc_mutex_lock( &p_sys->lock_sdp );
1345 if( p_sys->psz_sdp && *p_sys->psz_sdp )
1347 *pi_data = strlen( p_sys->psz_sdp );
1348 *pp_data = malloc( *pi_data );
1349 memcpy( *pp_data, p_sys->psz_sdp, *pi_data );
1356 vlc_mutex_unlock( &p_sys->lock_sdp );
1361 /****************************************************************************
1363 ****************************************************************************/
1364 static void* ThreadSend( void *data )
1367 # define ECONNREFUSED WSAECONNREFUSED
1368 # define ENOPROTOOPT WSAENOPROTOOPT
1369 # define EHOSTUNREACH WSAEHOSTUNREACH
1370 # define ENETUNREACH WSAENETUNREACH
1371 # define ENETDOWN WSAENETDOWN
1372 # define ENOBUFS WSAENOBUFS
1373 # define EAGAIN WSAEWOULDBLOCK
1374 # define EWOULDBLOCK WSAEWOULDBLOCK
1376 sout_stream_id_t *id = data;
1377 unsigned i_caching = id->i_caching;
1381 block_t *out = block_FifoGet( id->p_fifo );
1382 block_cleanup_push (out);
1386 { /* FIXME: this is awfully inefficient */
1387 size_t len = out->i_buffer;
1388 out = block_Realloc( out, 0, len + 10 );
1389 out->i_buffer = len;
1391 int canc = vlc_savecancel ();
1392 int val = srtp_send( id->srtp, out->p_buffer, &len, len + 10 );
1393 vlc_restorecancel (canc);
1397 msg_Dbg( id->p_stream, "SRTP sending error: %m" );
1398 block_Release( out );
1402 out->i_buffer = len;
1405 mwait (out->i_dts + i_caching);
1410 mwait (out->i_dts + i_caching);
1414 ssize_t len = out->i_buffer;
1415 int canc = vlc_savecancel ();
1417 vlc_mutex_lock( &id->lock_sink );
1418 unsigned deadc = 0; /* How many dead sockets? */
1419 int deadv[id->sinkc]; /* Dead sockets list */
1421 for( int i = 0; i < id->sinkc; i++ )
1424 if( !id->srtp ) /* FIXME: SRTCP support */
1426 SendRTCP( id->sinkv[i].rtcp, out );
1428 if( send( id->sinkv[i].rtp_fd, out->p_buffer, len, 0 ) == -1
1429 && net_errno != EAGAIN && net_errno != EWOULDBLOCK
1430 && net_errno != ENOBUFS && net_errno != ENOMEM )
1433 getsockopt( id->sinkv[i].rtp_fd, SOL_SOCKET, SO_TYPE,
1434 &type, &(socklen_t){ sizeof(type) });
1435 if( type == SOCK_DGRAM )
1436 /* ICMP soft error: ignore and retry */
1437 send( id->sinkv[i].rtp_fd, out->p_buffer, len, 0 );
1439 /* Broken connection */
1440 deadv[deadc++] = id->sinkv[i].rtp_fd;
1443 id->i_seq_sent_next = ntohs(((uint16_t *) out->p_buffer)[1]) + 1;
1444 vlc_mutex_unlock( &id->lock_sink );
1445 block_Release( out );
1447 for( unsigned i = 0; i < deadc; i++ )
1449 msg_Dbg( id->p_stream, "removing socket %d", deadv[i] );
1450 rtp_del_sink( id, deadv[i] );
1452 vlc_restorecancel (canc);
1458 /* This thread dequeues incoming connections (DCCP streaming) */
1459 static void *rtp_listen_thread( void *data )
1461 sout_stream_id_t *id = data;
1463 assert( id->listen.fd != NULL );
1467 int fd = net_Accept( id->p_stream, id->listen.fd );
1470 int canc = vlc_savecancel( );
1471 rtp_add_sink( id, fd, true, NULL );
1472 vlc_restorecancel( canc );
1479 int rtp_add_sink( sout_stream_id_t *id, int fd, bool rtcp_mux, uint16_t *seq )
1481 rtp_sink_t sink = { fd, NULL };
1482 sink.rtcp = OpenRTCP( VLC_OBJECT( id->p_stream ), fd, IPPROTO_UDP,
1484 if( sink.rtcp == NULL )
1485 msg_Err( id->p_stream, "RTCP failed!" );
1487 vlc_mutex_lock( &id->lock_sink );
1488 INSERT_ELEM( id->sinkv, id->sinkc, id->sinkc, sink );
1490 *seq = id->i_seq_sent_next;
1491 vlc_mutex_unlock( &id->lock_sink );
1495 void rtp_del_sink( sout_stream_id_t *id, int fd )
1497 rtp_sink_t sink = { fd, NULL };
1499 /* NOTE: must be safe to use if fd is not included */
1500 vlc_mutex_lock( &id->lock_sink );
1501 for( int i = 0; i < id->sinkc; i++ )
1503 if (id->sinkv[i].rtp_fd == fd)
1505 sink = id->sinkv[i];
1506 REMOVE_ELEM( id->sinkv, id->sinkc, i );
1510 vlc_mutex_unlock( &id->lock_sink );
1512 CloseRTCP( sink.rtcp );
1513 net_Close( sink.rtp_fd );
1516 uint16_t rtp_get_seq( sout_stream_id_t *id )
1518 /* This will return values for the next packet. */
1521 vlc_mutex_lock( &id->lock_sink );
1522 seq = id->i_seq_sent_next;
1523 vlc_mutex_unlock( &id->lock_sink );
1528 /* Return an arbitrary initial timestamp for RTP timestamp computations.
1529 * RFC 3550 states that the resulting initial RTP timestamps SHOULD be
1530 * random (although we use the same reference for all the ES as a
1531 * feature). In the VoD case, this function is called independently
1532 * from several parts of the code, so we need to always return the same
1534 static int64_t rtp_init_ts( const vod_media_t *p_media,
1535 const char *psz_vod_session )
1537 if (p_media == NULL || psz_vod_session == NULL)
1541 /* As per RFC 2326, session identifiers are at least 8 bytes long */
1542 strncpy((char *)&i_ts_init, psz_vod_session, sizeof(uint64_t));
1543 i_ts_init ^= (uintptr_t)p_media;
1544 /* Limit the timestamp to 48 bytes, this is enough and allows us
1545 * to stay away from overflows */
1546 i_ts_init &= 0xFFFFFFFFFFFF;
1550 /* Return a timestamp corresponding to packets being sent now, and that
1551 * can be passed to rtp_compute_ts() to get rtptime values for each ES.
1552 * Also return the NPT corresponding to this timestamp. If the stream
1553 * output is not started, the initial timestamp that will be used with
1554 * the first packets for NPT=0 is returned instead. */
1555 int64_t rtp_get_ts( const sout_stream_t *p_stream, const sout_stream_id_t *id,
1556 const vod_media_t *p_media, const char *psz_vod_session,
1563 p_stream = id->p_stream;
1565 if (p_stream == NULL)
1566 return rtp_init_ts(p_media, psz_vod_session);
1568 sout_stream_sys_t *p_sys = p_stream->p_sys;
1570 vlc_mutex_lock( &p_sys->lock_ts );
1571 i_npt_zero = p_sys->i_npt_zero;
1572 vlc_mutex_unlock( &p_sys->lock_ts );
1574 if( i_npt_zero == VLC_TS_INVALID )
1575 return p_sys->i_pts_zero;
1577 mtime_t now = mdate();
1578 if( now < i_npt_zero )
1579 return p_sys->i_pts_zero;
1581 int64_t npt = now - i_npt_zero;
1585 return p_sys->i_pts_zero + npt;
1588 void rtp_packetize_common( sout_stream_id_t *id, block_t *out,
1589 int b_marker, int64_t i_pts )
1591 if( !id->b_ts_init )
1593 sout_stream_sys_t *p_sys = id->p_stream->p_sys;
1594 vlc_mutex_lock( &p_sys->lock_ts );
1595 if( p_sys->i_npt_zero == VLC_TS_INVALID )
1597 /* This is the first packet of any ES. We initialize the
1598 * NPT=0 time reference, and the offset to match the
1599 * arbitrary PTS reference. */
1600 p_sys->i_npt_zero = i_pts + id->i_caching;
1601 p_sys->i_pts_offset = p_sys->i_pts_zero - i_pts;
1603 vlc_mutex_unlock( &p_sys->lock_ts );
1605 /* And in any case this is the first packet of this ES, so we
1606 * initialize the offset for this ES. */
1607 id->i_ts_offset = rtp_compute_ts( id->rtp_fmt.clock_rate,
1608 p_sys->i_pts_offset );
1609 id->b_ts_init = true;
1612 uint32_t i_timestamp = rtp_compute_ts( id->rtp_fmt.clock_rate, i_pts )
1615 out->p_buffer[0] = 0x80;
1616 out->p_buffer[1] = (b_marker?0x80:0x00)|id->rtp_fmt.payload_type;
1617 out->p_buffer[2] = ( id->i_sequence >> 8)&0xff;
1618 out->p_buffer[3] = ( id->i_sequence )&0xff;
1619 out->p_buffer[4] = ( i_timestamp >> 24 )&0xff;
1620 out->p_buffer[5] = ( i_timestamp >> 16 )&0xff;
1621 out->p_buffer[6] = ( i_timestamp >> 8 )&0xff;
1622 out->p_buffer[7] = ( i_timestamp )&0xff;
1624 memcpy( out->p_buffer + 8, id->ssrc, 4 );
1630 void rtp_packetize_send( sout_stream_id_t *id, block_t *out )
1632 block_FifoPut( id->p_fifo, out );
1636 * @return configured max RTP payload size (including payload type-specific
1637 * headers, excluding RTP and transport headers)
1639 size_t rtp_mtu (const sout_stream_id_t *id)
1641 return id->i_mtu - 12;
1644 /*****************************************************************************
1646 *****************************************************************************/
1648 /** Add an ES to a non-RTP muxed stream */
1649 static sout_stream_id_t *MuxAdd( sout_stream_t *p_stream, es_format_t *p_fmt )
1651 sout_input_t *p_input;
1652 sout_mux_t *p_mux = p_stream->p_sys->p_mux;
1653 assert( p_mux != NULL );
1655 p_input = sout_MuxAddStream( p_mux, p_fmt );
1656 if( p_input == NULL )
1658 msg_Err( p_stream, "cannot add this stream to the muxer" );
1662 return (sout_stream_id_t *)p_input;
1666 static int MuxSend( sout_stream_t *p_stream, sout_stream_id_t *id,
1669 sout_mux_t *p_mux = p_stream->p_sys->p_mux;
1670 assert( p_mux != NULL );
1672 sout_MuxSendBuffer( p_mux, (sout_input_t *)id, p_buffer );
1677 /** Remove an ES from a non-RTP muxed stream */
1678 static int MuxDel( sout_stream_t *p_stream, sout_stream_id_t *id )
1680 sout_mux_t *p_mux = p_stream->p_sys->p_mux;
1681 assert( p_mux != NULL );
1683 sout_MuxDeleteStream( p_mux, (sout_input_t *)id );
1688 static ssize_t AccessOutGrabberWriteBuffer( sout_stream_t *p_stream,
1689 const block_t *p_buffer )
1691 sout_stream_sys_t *p_sys = p_stream->p_sys;
1692 sout_stream_id_t *id = p_sys->es[0];
1694 int64_t i_dts = p_buffer->i_dts;
1696 uint8_t *p_data = p_buffer->p_buffer;
1697 size_t i_data = p_buffer->i_buffer;
1698 size_t i_max = id->i_mtu - 12;
1700 size_t i_packet = ( p_buffer->i_buffer + i_max - 1 ) / i_max;
1706 /* output complete packet */
1707 if( p_sys->packet &&
1708 p_sys->packet->i_buffer + i_data > i_max )
1710 rtp_packetize_send( id, p_sys->packet );
1711 p_sys->packet = NULL;
1714 if( p_sys->packet == NULL )
1716 /* allocate a new packet */
1717 p_sys->packet = block_New( p_stream, id->i_mtu );
1718 rtp_packetize_common( id, p_sys->packet, 1, i_dts );
1719 p_sys->packet->i_dts = i_dts;
1720 p_sys->packet->i_length = p_buffer->i_length / i_packet;
1721 i_dts += p_sys->packet->i_length;
1724 i_size = __MIN( i_data,
1725 (unsigned)(id->i_mtu - p_sys->packet->i_buffer) );
1727 memcpy( &p_sys->packet->p_buffer[p_sys->packet->i_buffer],
1730 p_sys->packet->i_buffer += i_size;
1739 static ssize_t AccessOutGrabberWrite( sout_access_out_t *p_access,
1742 sout_stream_t *p_stream = (sout_stream_t*)p_access->p_sys;
1748 AccessOutGrabberWriteBuffer( p_stream, p_buffer );
1750 p_next = p_buffer->p_next;
1751 block_Release( p_buffer );
1759 static sout_access_out_t *GrabberCreate( sout_stream_t *p_stream )
1761 sout_access_out_t *p_grab;
1763 p_grab = vlc_object_create( p_stream->p_sout, sizeof( *p_grab ) );
1764 if( p_grab == NULL )
1767 p_grab->p_module = NULL;
1768 p_grab->psz_access = strdup( "grab" );
1769 p_grab->p_cfg = NULL;
1770 p_grab->psz_path = strdup( "" );
1771 p_grab->p_sys = (sout_access_out_sys_t *)p_stream;
1772 p_grab->pf_seek = NULL;
1773 p_grab->pf_write = AccessOutGrabberWrite;
1774 vlc_object_attach( p_grab, p_stream );