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Commit 9cb381a0 authored by Eric Petit's avatar Eric Petit
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netsync.c: converted to unix file because BeOS' gcc chokes on dos files

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modules/control/netsync.c
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/*****************************************************************************
* netsync.c: synchronisation between several network clients.
*****************************************************************************
* Copyright (C) 2004 VideoLAN
* $Id$
*
* Authors: Gildas Bazin <gbazin@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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/intf.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);
#endif
#include "network.h"
#define NETSYNC_PORT_MASTER 9875
#define NETSYNC_PORT_SLAVE 9876
/* Needed for Solaris */
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif
/*****************************************************************************
* 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_description( _("Network synchronisation") );
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;
};
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static void Run( intf_thread_t *p_intf );
/*****************************************************************************
* Activate: initialize and create stuff
*****************************************************************************/
static int Activate( vlc_object_t *p_this )
{
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;
}
p_intf->p_sys->p_input = NULL;
p_intf->pf_run = Run;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: destroy interface
*****************************************************************************/
void Close( vlc_object_t *p_this )
{
intf_thread_t *p_intf = (intf_thread_t*)p_this;
free( p_intf->p_sys );
}
/*****************************************************************************
* Run: interface thread
*****************************************************************************/
static void Run( intf_thread_t *p_intf )
{
#define MAX_MSG_LENGTH (2 * sizeof(int64_t))
vlc_bool_t b_master = config_GetInt( p_intf, "netsync-master" );
char *psz_master;
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( !b_master )
free( psz_master );
if( i_socket < 0 )
{
msg_Err( p_intf, "failed opening UDP socket." );
return;
}
/* 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;
/* 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( p_intf->p_sys->p_input == NULL )
{
/* Wait a bit */
msleep( INTF_IDLE_SLEEP );
continue;
}
/*
* We now have an input
*/
/* 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;
if( b_master )
{
struct sockaddr_storage from;
mtime_t i_date, i_clockref, i_master_clockref;
int i_struct_size, i_read, i_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 );
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 );
i_clockref = ntoh64(*(int64_t *)p_data);
i_date = mdate();
*(int64_t *)p_data = hton64( i_date );
i_master_clockref = GetClockRef( p_intf, i_clockref );
*(((int64_t *)p_data)+1) = hton64( i_master_clockref );
/* Reply to the sender */
sendto( i_socket, p_data, 2 * sizeof(int64_t), 0,
(struct sockaddr *)&from, i_struct_size );
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 );
}
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;
/* 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 );
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 );
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 );
continue;
}
i_master_date = ntoh64(*(int64_t *)p_data);
i_master_clockref = ntoh64(*(((int64_t *)p_data)+1));
i_diff_date = i_receive_date -
((i_receive_date - i_send_date) / 2 + i_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;
/* Update our clock to match the master's one */
if( i_client_clockref )
p_intf->p_sys->p_input->i_pts_delay -= i_drift;
}
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 );
/* Wait a bit */
msleep( INTF_IDLE_SLEEP );
}
}
if( p_intf->p_sys->p_input ) vlc_object_release( p_intf->p_sys->p_input );
net_Close( i_socket );
}
static mtime_t GetClockRef( intf_thread_t *p_intf, mtime_t i_pts )
{
input_thread_t *p_input = p_intf->p_sys->p_input;
pgrm_descriptor_t *p_pgrm;
if( !p_input ) return 0;
#if 0
p_pgrm = p_input->stream.p_selected_program;
if( p_pgrm ) return input_ClockGetTS( p_input, p_pgrm, i_pts );
#else
#warning "This code is currently broken. FIXME!!!"
#endif
return 0;
}
/*****************************************************************************
* netsync.c: synchronisation between several network clients.
*****************************************************************************
* Copyright (C) 2004 VideoLAN
* $Id$
*
* Authors: Gildas Bazin <gbazin@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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <vlc/vlc.h>
#include <vlc/intf.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);
#endif
#include "network.h"
#define NETSYNC_PORT_MASTER 9875
#define NETSYNC_PORT_SLAVE 9876
/* Needed for Solaris */
#ifndef INADDR_NONE
#define INADDR_NONE 0xffffffff
#endif
/*****************************************************************************
* 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_description( _("Network synchronisation") );
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;
};
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static void Run( intf_thread_t *p_intf );
/*****************************************************************************
* Activate: initialize and create stuff
*****************************************************************************/
static int Activate( vlc_object_t *p_this )
{
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;
}
p_intf->p_sys->p_input = NULL;
p_intf->pf_run = Run;
return VLC_SUCCESS;
}
/*****************************************************************************
* Close: destroy interface
*****************************************************************************/
void Close( vlc_object_t *p_this )
{
intf_thread_t *p_intf = (intf_thread_t*)p_this;
free( p_intf->p_sys );
}
/*****************************************************************************
* Run: interface thread
*****************************************************************************/
static void Run( intf_thread_t *p_intf )
{
#define MAX_MSG_LENGTH (2 * sizeof(int64_t))
vlc_bool_t b_master = config_GetInt( p_intf, "netsync-master" );
char *psz_master;
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( !b_master )
free( psz_master );
if( i_socket < 0 )
{
msg_Err( p_intf, "failed opening UDP socket." );
return;
}
/* 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;
/* 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( p_intf->p_sys->p_input == NULL )
{
/* Wait a bit */
msleep( INTF_IDLE_SLEEP );
continue;
}
/*
* We now have an input
*/
/* 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;
if( b_master )
{
struct sockaddr_storage from;
mtime_t i_date, i_clockref, i_master_clockref;
int i_struct_size, i_read, i_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 );
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 );
i_clockref = ntoh64(*(int64_t *)p_data);
i_date = mdate();
*(int64_t *)p_data = hton64( i_date );
i_master_clockref = GetClockRef( p_intf, i_clockref );
*(((int64_t *)p_data)+1) = hton64( i_master_clockref );
/* Reply to the sender */
sendto( i_socket, p_data, 2 * sizeof(int64_t), 0,
(struct sockaddr *)&from, i_struct_size );
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 );
}
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;
/* 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 );
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 );
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 );
continue;
}
i_master_date = ntoh64(*(int64_t *)p_data);
i_master_clockref = ntoh64(*(((int64_t *)p_data)+1));
i_diff_date = i_receive_date -
((i_receive_date - i_send_date) / 2 + i_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;
/* Update our clock to match the master's one */
if( i_client_clockref )
p_intf->p_sys->p_input->i_pts_delay -= i_drift;
}
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 );
/* Wait a bit */
msleep( INTF_IDLE_SLEEP );
}
}
if( p_intf->p_sys->p_input ) vlc_object_release( p_intf->p_sys->p_input );
net_Close( i_socket );
}
static mtime_t GetClockRef( intf_thread_t *p_intf, mtime_t i_pts )
{
input_thread_t *p_input = p_intf->p_sys->p_input;
pgrm_descriptor_t *p_pgrm;
if( !p_input ) return 0;
#if 0
p_pgrm = p_input->stream.p_selected_program;
if( p_pgrm ) return input_ClockGetTS( p_input, p_pgrm, i_pts );
#else
#warning "This code is currently broken. FIXME!!!"
#endif
return 0;
}
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