/**
* Process value for brightness/contrast filter.
*
* @param double *f - Filter, double of 4
* @param uint32_r value - Value to process
* @return double
**/
static double brcn_filter_process(double *f, uint32_t value)
{
double result;
#define RANGE(i) i[0]
#define SCALE(i) i[1]
#define SLOPE(i) i[2]
#define INTERCEPT(i) i[3]
result = ((SLOPE(f) * SCALE(f)) * value + INTERCEPT(f)) * RANGE(f);
if (result > RANGE(f)) {
result = RANGE(f);
} else if (result < 0.0) {
result = 0.0;
}
#undef RANGE
#undef SCALE
#undef SLOPE
#undef INTERCEPT
return result;
}
/*
* Read data from the remote socket and send it to the appropriate local
* socket.
* If this is a new connection, insert it in the connection table and
* place its handle in *chpp.
*/
static void udp_remote_to_local( struct intercept_s *ip, channel_s **chpp )
{
char buf[ MAX_DATAGRAM_SIZE ] ;
packet_s packet ;
channel_s *chp ;
bool_int addr_checked ;
*chpp = CHANNEL_NULL ;
packet.data = buf ;
packet.size = sizeof( buf ) ;
if ( get_incoming_packet( ip, &packet ) == FAILED )
return ;
chp = int_lookupconn( ip, &packet.from, &addr_checked ) ;
if ( chp == CHANNEL_NULL )
{
struct server *serp = INT_SERVER( ip ) ;
struct service *sp = SERVER_SERVICE( serp ) ;
connection_s *cop = SERVER_CONNECTION( serp ) ;
if ( ( chp = int_newconn( ip, &packet.from, INT_REMOTE( ip ) ) ) == NULL )
return ;
CONN_SETADDR( cop, &packet.from ) ; /* for logging */
if ( INTERCEPT( ip ) )
{
mask_t check_mask ;
access_e result ;
M_OR( check_mask, XMASK( CF_ADDRESS ), XMASK( CF_TIME ) ) ;
result = access_control( sp, cop, &check_mask ) ;
if ( result != AC_OK )
{
svc_log_failure( sp, cop, result ) ;
chp->ch_state = BAD_CHANNEL ;
return ;
}
}
/*
* Since we don't distinguish ports, there is no point to log
* another successful attempt from the same address
*/
if ( ! addr_checked )
svc_log_success( sp, cop, SERVER_PID( serp ) ) ;
*chpp = chp ;
}
else if ( chp->ch_state == BAD_CHANNEL )
return ;
#ifdef DEBUG_UDPINT
if ( debug.on )
msg( LOG_DEBUG, "udp_remote_to_local",
"sending %d bytes to server on port %d",
packet.size, ntohs( INT_LOCALADDR( ip )->sin_port ) ) ;
#endif
send_data( chp->ch_local_socket,
packet.data, packet.size, NULL ) ;
}
