From 9e1d873ca508177e4730948e32d5afee572ce310 Mon Sep 17 00:00:00 2001
From: Luca <Luca@hackerspace-bamberg.de>
Date: Sat, 31 May 2025 11:03:03 +0200
Subject: [PATCH] feat: extract radar data to image

---
 .gitignore  |   3 ++
 Cargo.lock  | 124 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml  |   1 +
 src/main.rs |  45 ++++++++++++++++++-
 4 files changed, 171 insertions(+), 2 deletions(-)
 create mode 100644 Cargo.lock

diff --git a/.gitignore b/.gitignore
index ea8c4bf..a443bd4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 /target
+
+input
+rv.png
diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..93d598b
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,124 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "adler2"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "512761e0bb2578dd7380c6baaa0f4ce03e84f95e960231d1dec8bf4d7d6e2627"
+
+[[package]]
+name = "autocfg"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ace50bade8e6234aa140d9a2f552bbee1db4d353f69b8217bc503490fc1a9f26"
+
+[[package]]
+name = "bitflags"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+
+[[package]]
+name = "bytemuck"
+version = "1.23.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9134a6ef01ce4b366b50689c94f82c14bc72bc5d0386829828a2e2752ef7958c"
+
+[[package]]
+name = "byteorder-lite"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "crc32fast"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a97769d94ddab943e4510d138150169a2758b5ef3eb191a9ee688de3e23ef7b3"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "fdeflate"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1e6853b52649d4ac5c0bd02320cddc5ba956bdb407c4b75a2c6b75bf51500f8c"
+dependencies = [
+ "simd-adler32",
+]
+
+[[package]]
+name = "flate2"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ced92e76e966ca2fd84c8f7aa01a4aea65b0eb6648d72f7c8f3e2764a67fece"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "image"
+version = "0.25.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db35664ce6b9810857a38a906215e75a9c879f0696556a39f59c62829710251a"
+dependencies = [
+ "bytemuck",
+ "byteorder-lite",
+ "num-traits",
+ "png",
+]
+
+[[package]]
+name = "miniz_oxide"
+version = "0.8.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3be647b768db090acb35d5ec5db2b0e1f1de11133ca123b9eacf5137868f892a"
+dependencies = [
+ "adler2",
+ "simd-adler32",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
+[[package]]
+name = "png"
+version = "0.17.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82151a2fc869e011c153adc57cf2789ccb8d9906ce52c0b39a6b5697749d7526"
+dependencies = [
+ "bitflags",
+ "crc32fast",
+ "fdeflate",
+ "flate2",
+ "miniz_oxide",
+]
+
+[[package]]
+name = "simd-adler32"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d66dc143e6b11c1eddc06d5c423cfc97062865baf299914ab64caa38182078fe"
+
+[[package]]
+name = "wetter"
+version = "0.1.0"
+dependencies = [
+ "image",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 9191fe5..9f4a365 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -4,3 +4,4 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+image = { version = "0.25.6", default-features = false, features = ["png"] }
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..7bd51b3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,44 @@
-fn main() {
-    println!("Hello, world!");
+use std::fs;
+
+use image::imageops;
+use image::GrayAlphaImage;
+
+enum State {
+    Header,
+    Lsb,
+    Msb(u8),
+}
+
+fn main() {
+    let mut state = State::Header;
+    let mut data = Vec::with_capacity(1100 * 1200 * 2);
+
+    for b in fs::read("input").unwrap() {
+        match state {
+            State::Header if b == 3 => {
+                state = State::Lsb;
+            }
+            State::Header => (),
+            State::Lsb => {
+                state = State::Msb(b);
+            }
+            State::Msb(lsb) => {
+                let v = u16::from_le_bytes([lsb, b]);
+
+                if v == 0x29c4 {
+                    data.push(0);
+                    data.push(255);
+                } else {
+                    data.push(if v > 0 { 255 } else { 127 });
+                    data.push(255);
+                }
+
+                state = State::Lsb;
+            }
+        };
+    }
+
+    let mut img = GrayAlphaImage::from_raw(1100, 1200, data).unwrap();
+    imageops::flip_vertical_in_place(&mut img);
+    img.save("rv.png").unwrap();
 }