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pub trait ToFloat {
fn to_float(&self) -> f64;
}
impl ToFloat for u32 {
fn to_float(&self) -> f64 {
*self as f64
}
}
impl ToFloat for i32 {
fn to_float(&self) -> f64 {
*self as f64
}
}
pub struct Rational<T: ToFloat> {
pub numerator: T,
pub denominator: T,
}
impl<T: ToFloat> ToFloat for Rational<T> {
fn to_float(&self) -> f64 {
self.numerator.to_float() / self.denominator.to_float()
}
}
pub struct CurveLookupTable {
table: Vec<u16>,
}
impl CurveLookupTable {
pub fn from_sony_tone_table(values: [u16; 4]) -> CurveLookupTable {
let mut sony_curve = [0, 0, 0, 0, 0, 4095];
for i in 0..4 {
sony_curve[i + 1] = values[i] >> 2 & 0xfff;
}
let mut table = vec![0_u16; (sony_curve[5] + 1).into()];
for i in 0..5 {
for j in (sony_curve[i] + 1)..=sony_curve[i + 1] {
table[j as usize] = table[(j - 1) as usize] + (1 << i);
}
}
CurveLookupTable { table }
}
pub fn get(&self, x: usize) -> u16 {
self.table[x]
}
}
#[derive(Copy, Clone, Eq, PartialEq)]
pub enum Transform {
Horizontal,
MirrorHorizontal,
Rotate180,
MirrorVertical,
MirrorHorizontalRotate270,
Rotate90,
MirrorHorizontalRotate90,
Rotate270,
}
impl Transform {
pub fn is_identity(&self) -> bool {
*self == Transform::Horizontal
}
pub fn will_swap_coordinates(&self) -> bool {
use Transform as Tr;
match *self {
Tr::Horizontal | Tr::MirrorHorizontal | Tr::Rotate180 | Tr::MirrorVertical => false,
Tr::MirrorHorizontalRotate270 | Tr::Rotate90 | Tr::MirrorHorizontalRotate90 | Tr::Rotate270 => true,
}
}
}
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