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|
pub mod decode;
pub mod encode;
pub mod huffman;
use decode::Dec;
use encode::Enc;
use framework::bitstream_filter_main;
use glam::IVec2;
use std::env::args;
pub const BLOCK_SIZE: i32 = 8;
fn main() -> Result<(), std::io::Error> {
match args().nth(1).unwrap().as_str() {
"enc" => bitstream_filter_main::<Enc>(),
"dec" => bitstream_filter_main::<Dec>(),
_ => panic!("unknown mode"),
}
}
#[derive(Clone)]
struct Frame {
res: IVec2,
data: Vec<u8>,
}
impl Frame {
fn new(res: IVec2) -> Self {
Frame {
res,
data: vec![127; (res.x * res.y + res.x * res.y / 2) as usize],
}
}
fn export_block(&self, off: IVec2, buf: &mut Vec<u8>) {
// Luma
for y in 0..BLOCK_SIZE {
let y_off = off.x + (y + off.y) * self.res.x;
buf.extend(&self.data[y_off as usize..(y_off + BLOCK_SIZE) as usize]);
}
// Chroma
let uvplane_off = self.res.x * self.res.y;
for y in 0..BLOCK_SIZE / 2 {
let y_off = uvplane_off + (off.x & !1) + (y + off.y / 2) * self.res.x;
buf.extend(&self.data[y_off as usize..(y_off + BLOCK_SIZE) as usize]);
}
}
#[allow(unused)]
fn import_block(&mut self, off: IVec2, buf: &[u8]) -> usize {
let mut p = 0;
// Luma
for y in 0..BLOCK_SIZE {
let y_off = off.x + (y + off.y) * self.res.x;
self.data[y_off as usize..(y_off + BLOCK_SIZE) as usize]
.copy_from_slice(&buf[p..p + BLOCK_SIZE as usize]);
p += BLOCK_SIZE as usize;
}
// Chroma
let uvplane_off = self.res.x * self.res.y;
for y in 0..BLOCK_SIZE / 2 {
let y_off = uvplane_off + (off.x & !1) + (y + off.y / 2) * self.res.x;
self.data[y_off as usize..(y_off + BLOCK_SIZE) as usize]
.copy_from_slice(&buf[p..p + BLOCK_SIZE as usize]);
p += BLOCK_SIZE as usize;
}
p
}
fn import_block_diff(&mut self, off: IVec2, buf: &[u8]) -> usize {
// Luma
for y in 0..BLOCK_SIZE {
let y_off = off.x + (y + off.y) * self.res.x;
let i = y * BLOCK_SIZE;
for x in 0..BLOCK_SIZE {
self.data[(y_off + x) as usize] += buf[(i + x) as usize] as u8;
}
}
// Chroma
let uvplane_off = self.res.x * self.res.y;
for y in 0..BLOCK_SIZE / 2 {
let y_off = uvplane_off + (off.x & !1) + (y + off.y / 2) * self.res.x;
let i = BLOCK_SIZE * BLOCK_SIZE + y * BLOCK_SIZE;
for x in 0..BLOCK_SIZE {
self.data[(y_off + x) as usize] += buf[(i + x) as usize] as u8;
}
}
(BLOCK_SIZE * BLOCK_SIZE + BLOCK_SIZE * BLOCK_SIZE / 2) as usize
}
fn copy_block(aframe: &Frame, bframe: &mut Frame, aoff: IVec2, boff: IVec2) {
assert_eq!(aframe.res, bframe.res);
let res = aframe.res;
// Luma
for y in 0..BLOCK_SIZE {
let ay_off = aoff.x + (y + aoff.y) * res.x;
let by_off = boff.x + (y + boff.y) * res.x;
bframe.data[by_off as usize..(by_off + BLOCK_SIZE) as usize]
.copy_from_slice(&aframe.data[ay_off as usize..(ay_off + BLOCK_SIZE) as usize]);
}
// Chroma
let uvplane_off = res.x * res.y;
for y in 0..BLOCK_SIZE / 2 {
let ay_off = uvplane_off + (aoff.x & !1) + (y + aoff.y / 2) * res.x;
let by_off = uvplane_off + (boff.x & !1) + (y + boff.y / 2) * res.x;
bframe.data[by_off as usize..(by_off + BLOCK_SIZE) as usize]
.copy_from_slice(&aframe.data[ay_off as usize..(ay_off + BLOCK_SIZE) as usize]);
}
}
fn compare_block(aframe: &Frame, bframe: &Frame, aoff: IVec2, boff: IVec2) -> u32 {
assert_eq!(aframe.res, bframe.res);
let res = aframe.res;
let mut diff = 0;
// Luma
for y in 0..BLOCK_SIZE {
let ay_off = aoff.x + (y + aoff.y) * res.x;
let by_off = boff.x + (y + boff.y) * res.x;
for x in 0..BLOCK_SIZE {
diff += aframe.data[(ay_off + x) as usize]
.abs_diff(bframe.data[(by_off + x) as usize]) as u32
}
}
// Chroma
let uvplane_off = res.x * res.y;
for y in 0..BLOCK_SIZE / 2 {
let ay_off = uvplane_off + (aoff.x & !1) + (y + aoff.y / 2) * res.x;
let by_off = uvplane_off + (boff.x & !1) + (y + boff.y / 2) * res.x;
for x in 0..BLOCK_SIZE {
diff += aframe.data[(ay_off + x) as usize]
.abs_diff(bframe.data[(by_off + x) as usize]) as u32;
}
}
diff
}
}
|
