/*****************************************************************************
* 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 = 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;
}
/* 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 );
#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 );
#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;
/* 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;
}
#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 );
#endif
/* 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 );
}
/*****************************************************************************
* Run: interface thread
*****************************************************************************/
static void Run( intf_thread_t *p_intf )
{
#define MAX_MSG_LENGTH (2 * sizeof(int64_t))
input_thread_t *p_input = NULL;
char p_data[MAX_MSG_LENGTH];
int i_socket;
int canc = vlc_savecancel();
/* High priority thread */
vlc_thread_set_priority( p_intf, VLC_THREAD_PRIORITY_INPUT );
while( vlc_object_alive( p_intf ) )
{
/* Update the input */
if( p_input == NULL )
p_input =
(input_thread_t *)vlc_object_find( p_intf, VLC_OBJECT_INPUT,
FIND_ANYWHERE );
else if( p_input->b_dead )
{
vlc_object_release( p_input );
p_input = NULL;
}
if( p_input == NULL )
{
/* Wait a bit */
msleep( INTF_IDLE_SLEEP );
continue;
}
/*
* We now have an input
*/
/* Initialize file descriptor set and timeout (0.5s) */
/* FIXME: arbitrary tick */
struct pollfd ufd = { .fd = i_socket, .events = POLLIN, };
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 = poll( &ufd, 1, 500 );
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,
(unsigned int *)&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 );
#if 0
msg_Dbg( p_intf, "Master clockref: %"PRId64" -> %"PRId64", from %s "
"(date: %"PRId64")", i_clockref, i_master_clockref,
from.ss_family == AF_INET
? inet_ntoa(((struct sockaddr_in *)&from)->sin_addr)
: "non-IPv4", i_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;
/* 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 = poll( &ufd, 1, 500 );
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_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_input->i_pts_delay -= i_drift;
}
#if 0
msg_Dbg( p_intf, "Slave clockref: %"PRId64" -> %"PRId64" -> %"PRId64", "
"clock diff: %"PRId64" drift: %"PRId64,
i_clockref, i_master_clockref,
i_client_clockref, i_diff_date, i_drift );
#endif
/* Wait a bit */
msleep( INTF_IDLE_SLEEP );
}
}
if( p_input ) vlc_object_release( p_input );
vlc_restorecancel( canc );
}
