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use crate::{Frame, Ref, View, P2};
use std::simd::{i32x16, SimdInt};
// 4ms
pub fn diff([frame1, frame2]: [&Frame; 2], view: View, rp: Ref) -> u32 {
let mut k = 0;
for y in view.a.y..view.b.y {
for x in view.a.x..view.b.x {
let p1 = frame1[P2 { x, y }] + rp.color_off;
let p2 = frame2[P2 { x, y }];
k += p1.r.abs_diff(p2.r) as u32
+ p1.g.abs_diff(p2.g) as u32
+ p1.b.abs_diff(p2.b) as u32;
}
}
k
}
pub fn fast_diff([frame1, frame2]: [&Frame; 2], view: View, rp: Ref) -> u32 {
let mut k = 0;
let mut diff_lanes = i32x16::from_array([0; 16]);
let mut k1 = [0; 16];
let mut k2 = [0; 16];
let next_line = frame1.size.x as usize - view.size().x as usize;
let index_start = view.a.x as usize + view.a.y as usize * frame1.size.x as usize;
let index_end = view.b.x as usize + (view.b.y as usize - 1) * frame1.size.x as usize;
let mut i = index_start;
let mut x = view.a.x;
let mut kfill = 0;
while i < index_end {
k1[kfill] = frame1.pixels[i].r as i32;
k2[kfill] = frame2.pixels[i].r as i32;
kfill += 1;
k1[kfill] = frame1.pixels[i].g as i32;
k2[kfill] = frame2.pixels[i].g as i32;
kfill += 1;
k1[kfill] = frame1.pixels[i].b as i32;
k2[kfill] = frame2.pixels[i].b as i32;
kfill += 1;
i += 1;
x += 1;
if x > view.b.x {
i += next_line;
x = view.a.x
}
if kfill == 15 {
let pl1 = i32x16::from_array(k1);
let pl2 = i32x16::from_array(k2);
diff_lanes += (pl1 - pl2).abs();
kfill = 0;
}
}
return diff_lanes.reduce_sum() as u32;
}
// pub fn fast_diff([frame1, frame2]: [&Frame; 2], view: View, rp: Ref) -> u32 {
// let mut k = 0;
// let mut diff_lanes = i32x16::from_array([0; 16]);
// let mut k1 = [0; 16];
// let mut k2 = [0; 16];
// let next_line = frame1.size.x as usize - view.size().x as usize;
// let index_start = view.a.x as usize + view.a.y as usize * frame1.size.x as usize;
// let index_end = view.b.x as usize + (view.b.y as usize - 1) * frame1.size.x as usize;
// let mut i = index_start;
// let mut x = view.a.x;
// let mut kfill = 0;
// while i < index_end {
// k1[kfill] = frame1.pixels[i].r as i32;
// k2[kfill] = frame2.pixels[i].r as i32;
// kfill += 1;
// k1[kfill] = frame1.pixels[i].g as i32;
// k2[kfill] = frame2.pixels[i].g as i32;
// kfill += 1;
// k1[kfill] = frame1.pixels[i].b as i32;
// k2[kfill] = frame2.pixels[i].b as i32;
// kfill += 1;
// i += 1;
// x += 1;
// if x > view.b.x {
// i += next_line;
// x = view.a.x
// }
// if kfill == 15 {
// let pl1 = i32x16::from_array(k1);
// let pl2 = i32x16::from_array(k2);
// diff_lanes += (pl1 - pl2).abs();
// kfill = 0;
// }
// }
// return diff_lanes.reduce_sum() as u32;
// }
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