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use framework::{
vector::{UVec2, Vec2},
Frame, Framework, Pixel,
};
use rayon::join;
const WIDTH: usize = 1920;
const HEIGHT: usize = 1080;
fn main() {
let (mut framework, params) = Framework::init();
match params.mode {
framework::CodecMode::Encode => {
let mut oframe = Frame::new(params.width, params.height);
let mut dframe = Frame::new(params.width, params.height);
let mut out = Vec::<u8>::new();
while let Some(iframe) = framework.next_frame() {
let t = encode(&oframe, &iframe, Area::root());
decode(&mut oframe, Area::root(), &t);
write(&mut out, &t);
if params.debug > 0 {
dframe.pixels.copy_from_slice(&oframe.pixels);
debug(&mut dframe, Area::root(), &t);
framework.decode_done(&dframe);
} else {
framework.decode_done(&oframe)
}
out.clear();
}
}
framework::CodecMode::Decode => todo!(),
}
}
pub fn write(w: &mut Vec<u8>, t: &DiffTree) {
match t {
DiffTree::Split([a, b]) => {
w.push(0);
write(w, a);
write(w, b);
}
DiffTree::Diff(d) => w.extend([1, d.r as u8, d.g as u8, d.b as u8]),
}
}
pub fn decode(f: &mut Frame, area: Area, tree: &DiffTree) {
match tree {
DiffTree::Split([ta, tb]) => {
let (aa, ab) = area.split();
decode(f, aa, ta);
decode(f, ab, tb);
}
DiffTree::Diff(diff) => {
apply_area_diff(f, area, *diff);
}
}
}
pub fn debug(f: &mut Frame, area: Area, tree: &DiffTree) {
match tree {
DiffTree::Split([ta, tb]) => {
let (aa, ab) = area.split();
decode(f, aa, ta);
decode(f, ab, tb);
}
DiffTree::Diff(_diff) => {
let Area { x1, y1, x2, y2 } = area;
for x in x1..x2 {
for y in y1..y2 {
f[(x, y)] = Pixel { r: 0, g: 0, b: 255 }
}
}
}
}
}
pub fn encode(a: &Frame, b: &Frame, area: Area) -> DiffTree {
if area.area() == 1 {
DiffTree::Diff(diff_pixel(
a,
b,
Vec2 {
x: area.x1,
y: area.y1,
},
))
} else {
let (aa, ba) = area.split();
let (at, bt) = join(|| encode(a, b, aa), || encode(a, b, ba));
match (&at, &bt) {
(DiffTree::Diff(ad), DiffTree::Diff(bd)) => {
let d_r = ad.r.abs_diff(bd.r);
let d_g = ad.g.abs_diff(bd.g);
let d_b = ad.b.abs_diff(bd.b);
let visdiff = (d_r as usize + d_g as usize + d_b as usize) * aa.area();
if visdiff < 100 {
return DiffTree::Diff(Pixel {
r: ((ad.r as i16 + bd.r as i16) / 2) as i8,
g: ((ad.g as i16 + bd.g as i16) / 2) as i8,
b: ((ad.b as i16 + bd.b as i16) / 2) as i8,
});
}
}
_ => (),
}
DiffTree::Split([Box::new(at), Box::new(bt)])
}
}
pub enum DiffTree {
Split([Box<DiffTree>; 2]),
Diff(Pixel<i8>),
}
#[derive(Debug, Clone, Copy)]
pub struct Area {
x1: usize,
y1: usize,
x2: usize,
y2: usize,
}
#[inline]
fn diff_clamp(x: u8, y: u8) -> i8 {
if y >= x {
(y - x).min(127) as i8
} else {
-((x - y).min(128) as i8)
}
}
pub fn diff_pixel(a: &Frame, b: &Frame, p: UVec2) -> Pixel<i8> {
let (ap, bp) = (a[p], b[p]);
Pixel {
r: diff_clamp(ap.r, bp.r),
g: diff_clamp(ap.g, bp.g),
b: diff_clamp(ap.b, bp.b),
}
}
pub fn apply_area_diff(frame: &mut Frame, Area { x1, y1, x2, y2 }: Area, diff: Pixel<i8>) {
for x in x1..x2 {
for y in y1..y2 {
let p = &mut frame[(x, y)];
p.r = p.r.saturating_add_signed(diff.r);
p.g = p.g.saturating_add_signed(diff.g);
p.b = p.b.saturating_add_signed(diff.b);
}
}
}
impl Area {
pub fn area(&self) -> usize {
self.width() as usize * self.height() as usize
}
pub fn width(&self) -> usize {
self.x2 - self.x1
}
pub fn height(&self) -> usize {
self.y2 - self.y1
}
pub fn root() -> Self {
Area {
x1: 0,
y1: 0,
x2: WIDTH,
y2: HEIGHT,
}
}
pub fn split(&self) -> (Self, Self) {
let Area { x1, y1, x2, y2 } = *self;
if self.width() > self.height() {
let xm = (self.x1 + self.x2) / 2;
(Self { x1, x2: xm, y1, y2 }, Self { x1: xm, x2, y1, y2 })
} else {
let ym = (self.y1 + self.y2) / 2;
(Self { x1, x2, y1, y2: ym }, Self { x1, x2, y1: ym, y2 })
}
}
}
|
