/*****************************************************************************
* netsync.c: synchronisation between several network clients.
*****************************************************************************
- * Copyright (C) 2004 VideoLAN
+ * Copyright (C) 2004-2009 the VideoLAN team
* $Id$
*
* Authors: Gildas Bazin <gbazin@videolan.org>
+ * Jean-Paul Saman <jpsaman@videolan.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <stdlib.h>
-#include <vlc/vlc.h>
-#include <vlc/intf.h>
-#include <vlc/input.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+#include <vlc_interface.h>
+#include <vlc_input.h>
+#include <vlc_playlist.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
-
-#ifdef HAVE_SYS_TIME_H
-# include <sys/time.h>
-#endif
#include <sys/types.h>
-
-#ifdef WIN32
-# include <winsock2.h>
-# include <ws2tcpip.h>
-# ifndef IN_MULTICAST
-# define IN_MULTICAST(a) IN_CLASSD(a)
-# endif
-#else
-# include <sys/socket.h>
-# include <netinet/in.h>
-# if HAVE_ARPA_INET_H
-# include <arpa/inet.h>
-# elif defined( SYS_BEOS )
-# include <net/netdb.h>
-# endif
-#endif
-
-#ifdef UNDER_CE
-# define close(a) CloseHandle(a);
-#elif defined( WIN32 )
-# define close(a) closesocket(a);
+#ifdef HAVE_POLL
+# include <poll.h>
#endif
-#include "network.h"
+#include <vlc_network.h>
-#define NETSYNC_PORT_MASTER 9875
-#define NETSYNC_PORT_SLAVE 9876
-
-/* Needed for Solaris */
-#ifndef INADDR_NONE
-#define INADDR_NONE 0xffffffff
-#endif
+#define NETSYNC_PORT 9875
/*****************************************************************************
* Module descriptor
*****************************************************************************/
-static int Activate( vlc_object_t * );
-static void Close ( vlc_object_t * );
-
-static mtime_t GetClockRef( intf_thread_t *, mtime_t );
-
-#define NETSYNC_TEXT N_( "Act as master for network synchronisation" )
-#define NETSYNC_LONGTEXT N_( "Allows you to specify if this client should " \
- "act as the master client for the network synchronisation." )
-
-#define MIP_TEXT N_( "Master client ip address" )
-#define MIP_LONGTEXT N_( "Allows you to specify the ip address of " \
- "the master client used for the network synchronisation." )
-
-vlc_module_begin();
- set_shortname( _("Netsync"));
- set_description( _("Network synchronisation") );
- set_category( CAT_INTERFACE );
- set_subcategory( SUBCAT_INTERFACE_CONTROL );
-
- add_bool( "netsync-master", 0, NULL,
- NETSYNC_TEXT, NETSYNC_LONGTEXT, VLC_TRUE );
- add_string( "netsync-master-ip", NULL, NULL, MIP_TEXT, MIP_LONGTEXT,
- VLC_TRUE );
-
- set_capability( "interface", 0 );
- set_callbacks( Activate, Close );
-vlc_module_end();
-
-struct intf_sys_t
-{
- input_thread_t *p_input;
-};
+static int Open (vlc_object_t *);
+static void Close(vlc_object_t *);
+
+#define NETSYNC_TEXT N_("Network master clock")
+#define NETSYNC_LONGTEXT N_("When set then " \
+ "this vlc instance shall dictate its clock for synchronisation" \
+ "over clients listening on the masters network ip address")
+
+#define MIP_TEXT N_("Master server ip address")
+#define MIP_LONGTEXT N_("The IP address of " \
+ "the network master clock to use for clock synchronisation.")
+
+#define NETSYNC_TIMEOUT_TEXT N_("UDP timeout (in ms)")
+#define NETSYNC_TIMEOUT_LONGTEXT N_("Amount of time (in ms) " \
+ "to wait before aborting network reception of data.")
+
+vlc_module_begin()
+ set_shortname(N_("Network Sync"))
+ set_description(N_("Network synchronisation"))
+ set_category(CAT_ADVANCED)
+ set_subcategory(SUBCAT_ADVANCED_MISC)
+
+ add_bool("netsync-master", false, NULL,
+ NETSYNC_TEXT, NETSYNC_LONGTEXT, true)
+ add_string("netsync-master-ip", NULL, NULL, MIP_TEXT, MIP_LONGTEXT,
+ true)
+ add_integer("netsync-timeout", 500, NULL,
+ NETSYNC_TIMEOUT_TEXT, NETSYNC_TIMEOUT_LONGTEXT, true)
+
+ set_capability("interface", 0)
+ set_callbacks(Open, Close)
+vlc_module_end()
/*****************************************************************************
* Local prototypes
*****************************************************************************/
-static void Run( intf_thread_t *p_intf );
+static void Run(intf_thread_t *intf);
/*****************************************************************************
* Activate: initialize and create stuff
*****************************************************************************/
-static int Activate( vlc_object_t *p_this )
+static int Open(vlc_object_t *object)
{
- intf_thread_t *p_intf = (intf_thread_t*)p_this;
-
- msg_Info( p_intf, "Using the netsync interface module..." );
-
- p_intf->p_sys = malloc( sizeof( intf_sys_t ) );
- if( !p_intf->p_sys )
- {
- msg_Err( p_intf, "no memory" );
- return VLC_ENOMEM;
+ intf_thread_t *intf = (intf_thread_t*)object;
+ int fd;
+
+ if (!var_InheritBool(intf, "netsync-master")) {
+ char *psz_master = var_InheritString(intf, "netsync-master-ip");
+ if (psz_master == NULL) {
+ msg_Err(intf, "master address not specified");
+ return VLC_EGENERIC;
+ }
+ fd = net_ConnectUDP(VLC_OBJECT(intf), psz_master, NETSYNC_PORT, -1);
+ free(psz_master);
}
+ else
+ fd = net_ListenUDP1(VLC_OBJECT(intf), NULL, NETSYNC_PORT);
- p_intf->p_sys->p_input = NULL;
+ if (fd == -1) {
+ msg_Err(intf, "Netsync socket failure");
+ return VLC_EGENERIC;
+ }
- p_intf->pf_run = Run;
+ intf->p_sys = (void *)(intptr_t)fd;
+ intf->pf_run = Run;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: destroy interface
*****************************************************************************/
-void Close( vlc_object_t *p_this )
+void Close(vlc_object_t *object)
{
- intf_thread_t *p_intf = (intf_thread_t*)p_this;
+ intf_thread_t *intf = (intf_thread_t*)object;
- free( p_intf->p_sys );
+ net_Close((intptr_t)intf->p_sys);
}
/*****************************************************************************
* Run: interface thread
*****************************************************************************/
-static void Run( intf_thread_t *p_intf )
+static void Run(intf_thread_t *intf)
{
#define MAX_MSG_LENGTH (2 * sizeof(int64_t))
+ int canc = vlc_savecancel();
+ input_thread_t *input = NULL;
+ char data[MAX_MSG_LENGTH];
+ int fd = (intptr_t)intf->p_sys;
- vlc_bool_t b_master = config_GetInt( p_intf, "netsync-master" );
- char *psz_master = NULL;
- char p_data[MAX_MSG_LENGTH];
- int i_socket;
-
- if( !b_master )
- {
- psz_master = config_GetPsz( p_intf, "netsync-master-ip" );
- if( psz_master == NULL )
- {
- msg_Err( p_intf, "master address not specified" );
- return;
- }
- }
-
- i_socket = net_OpenUDP( p_intf, NULL,
- b_master ? NETSYNC_PORT_MASTER : NETSYNC_PORT_SLAVE,
- b_master ? NULL : psz_master,
- b_master ? 0 : NETSYNC_PORT_MASTER );
-
- if( psz_master ) free( psz_master );
-
- if( i_socket < 0 )
- {
- msg_Err( p_intf, "failed opening UDP socket." );
- return;
- }
+ playlist_t *playlist = pl_Hold(intf);
+ int timeout = var_InheritInteger(intf, "netsync-timeout");
+ if (timeout < 500)
+ timeout = 500;
+ bool is_master = var_InheritBool(intf, "netsync-master");
/* High priority thread */
- vlc_thread_set_priority( p_intf, VLC_THREAD_PRIORITY_INPUT );
-
- while( !p_intf->b_die )
- {
- struct timeval timeout;
- fd_set fds_r;
+ vlc_thread_set_priority(intf, VLC_THREAD_PRIORITY_INPUT);
+ while (vlc_object_alive(intf)) {
/* Update the input */
- if( p_intf->p_sys->p_input == NULL )
- {
- p_intf->p_sys->p_input =
- (input_thread_t *)vlc_object_find( p_intf, VLC_OBJECT_INPUT,
- FIND_ANYWHERE );
- }
- else if( p_intf->p_sys->p_input->b_dead )
- {
- vlc_object_release( p_intf->p_sys->p_input );
- p_intf->p_sys->p_input = NULL;
+ if (input == NULL) {
+ input = playlist_CurrentInput(playlist);
+ } else if (input->b_dead || !vlc_object_alive(input)) {
+ vlc_object_release(input);
+ input = NULL;
}
- if( p_intf->p_sys->p_input == NULL )
- {
+ if (input == NULL) {
/* Wait a bit */
- msleep( INTF_IDLE_SLEEP );
+ msleep(INTF_IDLE_SLEEP);
continue;
}
*/
/* Initialize file descriptor set and timeout (0.5s) */
- FD_ZERO( &fds_r );
- FD_SET( i_socket, &fds_r );
- timeout.tv_sec = 0;
- timeout.tv_usec = 500000;
+ /* FIXME: arbitrary tick */
+ struct pollfd ufd = { .fd = fd, .events = POLLIN, };
- if( b_master )
- {
+ if (is_master) {
struct sockaddr_storage from;
- mtime_t i_date, i_clockref, i_master_clockref;
- int i_struct_size, i_read, i_ret;
+ mtime_t master_system;
+ mtime_t client_system;
+ mtime_t date;
+ int struct_size, read_size, ret;
/* Don't block */
- i_ret = select( i_socket + 1, &fds_r, 0, 0, &timeout );
- if( i_ret == 0 ) continue;
- if( i_ret < 0 )
- {
- /* Wait a bit */
- msleep( INTF_IDLE_SLEEP );
+ ret = poll(&ufd, 1, timeout);
+ if (ret <= 0)
continue;
- }
/* We received something */
- i_struct_size = sizeof( from );
- i_read = recvfrom( i_socket, p_data, MAX_MSG_LENGTH, 0,
- (struct sockaddr*)&from, &i_struct_size );
+ struct_size = sizeof(from);
+ read_size = recvfrom(fd, data, MAX_MSG_LENGTH, 0,
+ (struct sockaddr*)&from,
+ (unsigned int *)&struct_size);
+
+ /* not sure we need the client information to sync,
+ since we are the master anyway */
+ client_system = ntoh64(*(int64_t *)data);
- i_clockref = ntoh64(*(int64_t *)p_data);
+ date = mdate();
- i_date = mdate();
- *(int64_t *)p_data = hton64( i_date );
+ if (input_GetPcrSystem(input, &master_system))
+ continue;
- i_master_clockref = GetClockRef( p_intf, i_clockref );
- *(((int64_t *)p_data)+1) = hton64( i_master_clockref );
+ *((int64_t *)data) = hton64(date);
+ *(((int64_t *)data)+1) = hton64(master_system);
/* Reply to the sender */
- sendto( i_socket, p_data, 2 * sizeof(int64_t), 0,
- (struct sockaddr *)&from, i_struct_size );
+ sendto(fd, data, 2 * sizeof(int64_t), 0,
+ (struct sockaddr *)&from, struct_size);
#if 0
- msg_Dbg( p_intf, "Master clockref: "I64Fd" -> "I64Fd", from %s "
- "(date: "I64Fd")", i_clockref, i_master_clockref,
- from.ss_family == AF_INET
- ? inet_ntoa(((struct sockaddr_in *)&from)->sin_addr)
- : "non-IPv4", i_date );
+ msg_Dbg(intf, "Master clockref: %"PRId64" -> %"PRId64", from %s "
+ "(date: %"PRId64")", client_system, master_system,
+ (from.ss_family == AF_INET) ? inet_ntoa(((struct sockaddr_in *)&from)->sin_addr)
+ : "non-IPv4", date);
#endif
}
else
{
- mtime_t i_send_date, i_receive_date, i_master_date, i_diff_date;
- mtime_t i_master_clockref, i_client_clockref, i_drift;
- mtime_t i_clockref = 0;
- int i_sent, i_read, i_ret;
+ mtime_t master_system;
+ mtime_t client_system;
+ mtime_t system = 0;
+ mtime_t send_date, receive_date;
+ mtime_t diff_date, master_date;
+ int sent, read_size, ret;
+
+ if (input_GetPcrSystem(input, &system)) {
+ msleep(INTF_IDLE_SLEEP);
+ continue;
+ }
/* Send clock request to the master */
- *(int64_t *)p_data = hton64( i_clockref );
- i_send_date = mdate();
-
- i_sent = send( i_socket, p_data, sizeof(int64_t), 0 );
- if( i_sent <= 0 )
- {
- /* Wait a bit */
- msleep( INTF_IDLE_SLEEP );
+ send_date = mdate();
+ *((int64_t *)data) = hton64(system);
+
+ sent = send(fd, data, sizeof(int64_t), 0);
+ if (sent <= 0) {
+ msleep(INTF_IDLE_SLEEP);
continue;
}
/* Don't block */
- i_ret = select(i_socket + 1, &fds_r, 0, 0, &timeout);
- if( i_ret == 0 ) continue;
- if( i_ret < 0 )
- {
- /* Wait a bit */
- msleep( INTF_IDLE_SLEEP );
+ ret = poll(&ufd, 1, timeout);
+ if (ret == 0)
+ continue;
+ if (ret < 0) {
+ msleep(INTF_IDLE_SLEEP);
continue;
}
- i_receive_date = mdate();
-
- i_read = recv( i_socket, p_data, MAX_MSG_LENGTH, 0 );
- if( i_read <= 0 )
- {
- /* Wait a bit */
- msleep( INTF_IDLE_SLEEP );
+ receive_date = mdate();
+ read_size = recv(fd, data, MAX_MSG_LENGTH, 0);
+ if (read_size <= 0) {
+ msleep(INTF_IDLE_SLEEP);
continue;
}
- i_master_date = ntoh64(*(int64_t *)p_data);
- i_master_clockref = ntoh64(*(((int64_t *)p_data)+1));
+ master_date = ntoh64(*(int64_t *)data);
+ master_system = ntoh64(*(((int64_t *)data)+1)); /* system date */
- i_diff_date = i_receive_date -
- ((i_receive_date - i_send_date) / 2 + i_master_date);
+ diff_date = receive_date -
+ ((receive_date - send_date) / 2 + master_date);
- i_client_clockref = i_drift = 0;
- if( p_intf->p_sys->p_input && i_master_clockref )
- {
- i_client_clockref = GetClockRef( p_intf, i_clockref );
- i_drift = i_client_clockref - i_master_clockref - i_diff_date;
+ if (input && master_system > 0) {
+ mtime_t diff_system;
- /* Update our clock to match the master's one */
- if( i_client_clockref )
- p_intf->p_sys->p_input->i_pts_delay -= i_drift;
- }
+ if (input_GetPcrSystem(input, &client_system)) {
+ msleep(INTF_IDLE_SLEEP);
+ continue;
+ }
+ diff_system = client_system - master_system - diff_date;
+ if (diff_system != 0) {
+ input_ModifyPcrSystem(input, true, master_system - diff_date);
#if 0
- msg_Dbg( p_intf, "Slave clockref: "I64Fd" -> "I64Fd" -> "I64Fd", "
- "clock diff: "I64Fd" drift: "I64Fd,
- i_clockref, i_master_clockref,
- i_client_clockref, i_diff_date, i_drift );
+ msg_Dbg(intf, "Slave clockref: %"PRId64" -> %"PRId64" -> %"PRId64","
+ " clock diff: %"PRId64", diff: %"PRId64"",
+ system, master_system, client_system,
+ diff_system, diff_date);
#endif
-
- /* Wait a bit */
- msleep( INTF_IDLE_SLEEP );
+ }
+ }
+ msleep(INTF_IDLE_SLEEP);
}
}
- if( p_intf->p_sys->p_input ) vlc_object_release( p_intf->p_sys->p_input );
- net_Close( i_socket );
+ if (input)
+ vlc_object_release(input);
+ pl_Release(intf);
+ vlc_restorecancel(canc);
}
-static mtime_t GetClockRef( intf_thread_t *p_intf, mtime_t i_pts )
-{
- input_thread_t *p_input = p_intf->p_sys->p_input;
- mtime_t i_ts;
-
- if( !p_input || !p_input->p_es_out ) return 0;
-
- if( es_out_Control( p_input->p_es_out, ES_OUT_GET_TS, i_pts, &i_ts ) ==
- VLC_SUCCESS )
- {
- return i_ts;
- }
-
- return 0;
-}
projects / vlc / blobdiff