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use lri_rs::{LriFile, RawImage, Whitepoint};
use nalgebra::{Matrix3, Matrix3x1};
mod unpack;
fn main() {
let file_name = std::env::args().nth(1).unwrap();
let bytes = std::fs::read(file_name).unwrap();
let lri = LriFile::decode(&bytes);
println!("{} images", lri.image_count());
for (idx, img) in lri.images().enumerate() {
make(img, format!("image_{idx}.png"));
}
}
// R G R G
// G B G B
// R G R G
const CFAS: &[&'static str] = &["RGGB", "GRBG", "GBRG", "BGGR"];
fn make(img: &RawImage, path: String) {
use rawproc::image::RawMetadata;
use rawproc::{colorspace::BayerRgb, image::Image};
let RawImage {
camera,
sensor,
width,
height,
format,
data,
sbro,
color,
} = img;
println!(
"{camera} {sensor:?} [{}:{}] {width}x{height} {format}",
sbro.0, sbro.1
);
// Assume 10-bit
let size = width * height;
let mut ten_data = vec![0; size];
unpack::tenbit(data, width * height, ten_data.as_mut_slice());
// I've only seen it on one color defintion or
// something, but there's a black level of 42, so subtract it
ten_data.iter_mut().for_each(|p| *p = p.saturating_sub(42));
// B G B G B G
// G R G R G R
// A1 - 1:0
// A2 - -1:-1
// A3 - 1:0
// A4 - 1:0
// A5 - 0:1
// B1 - NO
// B2 - RO
// B3 - RO
// B4 - RO
// B5 - NO
// C1 - NO
// C2 - RO
// C3 - NO
// C4 - RO
// C5 - RO
// C6 - -1:-1
let (rgb, color_format) = match img.cfa_string() {
Some(cfa_string) => {
let rawimg: Image<u16, BayerRgb> = Image::from_raw_parts(
4160,
3120,
// We only care about CFA here because all we're doing is debayering
RawMetadata {
whitebalance: [1.0; 3],
whitelevels: [1024; 3],
crop: None,
// ugh CFA isn't exposed, so we pulled in rawloader for now
cfa: rawloader::CFA::new(cfa_string),
cam_to_xyz: nalgebra::Matrix3::zeros(),
},
ten_data,
);
(rawimg.debayer().data, png::ColorType::Rgb)
}
None => (ten_data, png::ColorType::Grayscale),
};
let mut floats: Vec<f32> = rgb.into_iter().map(|p| p as f32 / 1023.0).collect();
print!("\t");
color.iter().for_each(|c| print!("{:?} ", c.whitepoint));
println!();
match img.daylight() {
Some(c) => {
//println!("\tApplying color profile: {:?}", c.color_matrix);
let to_xyz = Matrix3::from_row_slice(&c.forward_matrix);
let to_srgb = Matrix3::from_row_slice(&BRUCE_XYZ_RGB_D65);
//let color = Matrix3::from_row_slice(&c.color_matrix);
let premul = to_xyz * to_srgb;
for chnk in floats.chunks_mut(3) {
let r = chnk[0] * (1.0 / c.rg);
let g = chnk[1];
let b = chnk[2] * (1.0 / c.bg);
let px = Matrix3x1::new(r, g, b);
//let rgb = premul * px;
let xyz = to_xyz * px;
let rgb = to_srgb * xyz;
chnk[0] = srgb_gamma(rgb[0]) * 255.0;
chnk[1] = srgb_gamma(rgb[1]) * 255.0;
chnk[2] = srgb_gamma(rgb[2]) * 255.0;
}
}
None => {
println!("\tno color profile found");
floats.iter_mut().for_each(|f| *f = srgb_gamma(*f) * 255.0);
}
}
let bytes: Vec<u8> = floats.into_iter().map(|f| f as u8).collect();
println!("Writing {}", &path);
make_png(path, *width, *height, &bytes, color_format)
}
#[rustfmt::skip]
#[allow(dead_code)]
const BRUCE_XYZ_RGB_D50: [f32; 9] = [
3.1338561, -1.6168667, -0.4906146,
-0.9787684, 1.9161415, 0.0334540,
0.0719453, -0.2289914, 1.4052427
];
#[rustfmt::skip]
const BRUCE_XYZ_RGB_D65: [f32; 9] = [
3.2404542, -1.5371385, -0.4985314,
-0.9692660, 1.8760108, 0.0415560,
0.0556434, -0.2040259, 1.0572252
];
#[inline]
pub fn srgb_gamma(mut float: f32) -> f32 {
if float <= 0.0031308 {
float *= 12.92;
} else {
float = float.powf(1.0 / 2.4) * 1.055 - 0.055;
}
float.clamp(0.0, 1.0)
}
fn make_png<P: AsRef<std::path::Path>>(
path: P,
width: usize,
height: usize,
data: &[u8],
color_format: png::ColorType,
) {
//return;
use std::fs::File;
let file = File::create(path).unwrap();
let mut enc = png::Encoder::new(file, width as u32, height as u32);
enc.set_color(color_format);
enc.set_depth(png::BitDepth::Eight);
let mut writer = enc.write_header().unwrap();
writer.write_image_data(data).unwrap();
}
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