if( p_sys->csa )
{
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa-ck", ChangeKeyCallback, NULL );
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa2-ck", ChangeKeyCallback, NULL );
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa-use", ActiveKeyCallback, NULL );
csa_Delete( p_sys->csa );
if( p_sys->csa )
{
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa-ck", ChangeKeyCallback, NULL );
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa2-ck", ChangeKeyCallback, NULL );
var_DelCallback( p_mux, SOUT_CFG_PREFIX "csa-use", ActiveKeyCallback, NULL );
csa_Delete( p_sys->csa );