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add RLEVerticalExt (16 bit run length support)

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This commit is contained in:
Crispy 2025-06-16 23:46:01 +02:00
parent 90f648e0b0
commit 62ee8a6efa
8 changed files with 77689 additions and 106875 deletions
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46
encoder/src/enc.rs
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@ -1,6 +1,6 @@
use crate::*;
pub fn cell_diff_4_vertical_small(prev_frame: &Frame, frame: &Frame, loss: usize) -> EncodedFrame {
pub fn cell_diff_4_vertical(prev_frame: &Frame, frame: &Frame, loss: usize) -> EncodedFrame {
let loss = loss / 4;
const CELLS_X: usize = WIDTH / 4;
const CELLS_Y: usize = HEIGHT / 4;
@ -48,7 +48,7 @@ pub fn cell_diff_4_vertical_small(prev_frame: &Frame, frame: &Frame, loss: usize
data.extend_from_slice(&rle_255_encode(&changed_pixels));
EncodedFrame {
encoding: Encoding::CellDiff4VV_small,
encoding: Encoding::CellDiff4VV,
data,
}
}
@ -306,6 +306,48 @@ pub fn rle_vertical(_prev_frame: &Frame, frame: &Frame) -> EncodedFrame {
}
}
pub fn rle_vertical_ext(_prev_frame: &Frame, frame: &Frame) -> EncodedFrame {
let mut data = Vec::new();
let mut last_pixel = 0;
let mut run: u16 = 0;
let push_run = |data: &mut Vec<u8>, run| {
if run < 256 {
data.push(run as u8);
} else {
// double zero to mark 16 bit run length
// if data.last() != Some(&0) {
// }
data.push(0);
data.push(0);
data.push((run >> 8) as u8);
data.push((run & 0xff) as u8);
}
};
for x in 0..WIDTH {
for y in 0..HEIGHT {
let pixel = frame[x][y];
if pixel != last_pixel || run == 0xffff {
push_run(&mut data, run);
if run == 0xffff && pixel == last_pixel {
// inserting dummy run because we ran out of max len
data.push(0);
}
run = 1;
} else {
run += 1;
}
last_pixel = pixel;
}
}
push_run(&mut data, run);
EncodedFrame {
encoding: Encoding::RLEVerticalExt,
data,
}
}
pub fn fill_white(_prev_frame: &Frame, _frame: &Frame, _loss: usize) -> EncodedFrame {
EncodedFrame {
encoding: Encoding::FillWhite,