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switch 8x8 cell diff to vertical

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This commit is contained in:
Crispy 2024-04-12 17:43:49 +02:00
parent b85cb52ce0
commit 242724d7fd
4 changed files with 29 additions and 27 deletions
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3
.gitignore vendored
View file

@ -5,3 +5,6 @@
*.map
*.pdf
target/
*.png
*.mp4
*.webm

20
encoder/src/dec.rs
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@ -1,6 +1,6 @@
use crate::*;
pub fn cell_diff_8_horizontal(prev_frame: &Frame, encoded: &[u8], reader: &mut usize) -> Frame {
pub fn cell_diff_8_vertical(prev_frame: &Frame, encoded: &[u8], reader: &mut usize) -> Frame {
let bitmap = {
*reader += 3;
let mut bitmap = (encoded[0] as u32) << 16;
@ -15,23 +15,15 @@ pub fn cell_diff_8_horizontal(prev_frame: &Frame, encoded: &[u8], reader: &mut u
*reader += runs;
let cells_x = WIDTH / 8;
let cells_y = HEIGHT / 8;
let mut index = 0;
for celly in 0..cells_y {
for cellx in 0..cells_x {
for x in 0..WIDTH {
for y in 0..HEIGHT {
let cellx = x / 8;
let celly = y / 8;
let is_changed = (bitmap >> (cellx + cells_x * celly)) & 1;
if is_changed == 1 {
let pixels = &new_pixels[(index * 8 * 8)..((index + 1) * 8 * 8)];
let mut i = 0;
for dx in 0..8 {
for dy in 0..8 {
let x = cellx * 8 + dx;
let y = celly * 8 + dy;
frame[x][y] = pixels[i];
i += 1;
}
}
frame[x][y] = new_pixels[index];
index += 1;
}
}

23
encoder/src/enc.rs
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@ -1,6 +1,6 @@
use crate::*;
pub fn cell_diff_8_horizontal(prev_frame: &Frame, frame: &Frame) -> EncodedFrame {
pub fn cell_diff_8_vertical(prev_frame: &Frame, frame: &Frame) -> EncodedFrame {
let cells_x = WIDTH / 8;
let cells_y = HEIGHT / 8;
let loss = 0;
@ -8,17 +8,15 @@ pub fn cell_diff_8_horizontal(prev_frame: &Frame, frame: &Frame) -> EncodedFrame
let mut bitmap: u32 = 0;
let mut changed_pixels = Vec::new();
for celly in 0..cells_y {
for cellx in 0..cells_x {
for cellx in 0..cells_x {
for celly in 0..cells_y {
let mut changed = 0;
let mut cell_contents = Vec::new();
// todo try encoding the cells in frame space instead of one cell at a time
for dx in 0..8 {
for dy in 0..8 {
let x = cellx * 8 + dx;
let y = celly * 8 + dy;
let pixel = frame[x][y];
cell_contents.push(pixel);
if pixel != prev_frame[x][y] {
changed += 1;
}
@ -26,14 +24,23 @@ pub fn cell_diff_8_horizontal(prev_frame: &Frame, frame: &Frame) -> EncodedFrame
}
if changed > loss {
bitmap |= 1 << (cellx + cells_x * celly);
changed_pixels.extend_from_slice(&cell_contents);
}
}
}
for x in 0..WIDTH {
for y in 0..HEIGHT {
let cellx = x / 8;
let celly = y / 8;
let bit = 1 << (cellx + cells_x * celly);
if (bitmap & bit) != 0 {
changed_pixels.push(frame[x][y]);
}
}
}
let mut data = vec![(bitmap >> 16) as u8, (bitmap >> 8) as u8, bitmap as u8];
data.extend_from_slice(&rle_255_encode(&changed_pixels));
EncodedFrame {
encoding: Encoding::CellDiff8H,
encoding: Encoding::CellDiff8V,
data,
}
}

10
encoder/src/main.rs
View file

@ -57,7 +57,7 @@ fn encode(frames: &[Frame]) -> Vec<u8> {
enc::rle_diff_horizontal,
enc::rle_diff_vertical,
enc::bg_strips_horizontal,
enc::cell_diff_8_horizontal,
enc::cell_diff_8_vertical,
];
let mut last_frame = FRAME_0;
@ -109,8 +109,8 @@ enum Encoding {
// BGStripsV,
// QuadTree,
// DrawCommands,
CellDiff8H,
// CellDiff8V,
// CellDiff8H,
CellDiff8V,
// CellDiff4HH,
// CellDiff4HV,
// CellDiff4VH,
@ -129,8 +129,8 @@ fn get_matching_decoder(encoding: Encoding) -> FrameDecoder {
// Encoding::BGStripsV => todo!(),
// Encoding::QuadTree => todo!(),
// Encoding::DrawCommands => todo!(),
Encoding::CellDiff8H => dec::cell_diff_8_horizontal,
// Encoding::CellDiff8V => todo!(),
// Encoding::CellDiff8H => todo!(),
Encoding::CellDiff8V => dec::cell_diff_8_vertical,
// Encoding::CellDiff4HH => todo!(),
// Encoding::CellDiff4HV => todo!(),
// Encoding::CellDiff4VH => todo!(),