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use std::fs::File;
use lri_rs::Message;
// This code is going to be rough. Just trying to parse this using the technique
// I know: just play with the raw data
fn main() {
let fname = std::env::args().nth(1).unwrap();
let data = std::fs::read(fname).unwrap();
println!("Read {:.2}MB", data.len() as f32 / (1024.0 * 1024.0));
let header = LightHeader::new(&data[0..32]);
let whole_data = &data;
let data = &data[32..];
let LightHeader {
magic_number,
combined_length,
header_length,
message_length,
kind,
reserved,
} = header;
//AHHH it does not seem the combined legth or header length are correct? it seems like nonsense?
//drat. we'll know when I try and parse the message I think I extracted. 1510 bytes seems too
//small almost.
//the thing that makes me suspicious, and think it's right, is that the reserved are all 0x00
//and then the next byte is data, so.
println!("\nMagic: {magic_number}\nCombined Length: {combined_length}\nHeader Length: {header_length}\nMessage Length: {message_length}\nKind: {kind}\nReserved: {reserved:?}\nNext 8 Bytes: {:?}", &data[0..8]);
let message = &data[..message_length as usize];
//let data = &data[message_length as usize..];
//let asdf = lri_rs::LightHeader::parse_from_bytes(&data).unwrap();
//println!("{:?}", asdf.get_image_time_stamp());
// The camera says wall.lri was taken Jun 7, 2023 at 07:14 PM. Perhaps I can search the data for this
// to try and find a reference
// Used protobufpal.com to make this so i can look for it. it's the year/month/day of the date
let looking = [
0x08, 0xe7, 0x0f, 0x10, 0x06, 0x18, 0x07, 0x20, 0x13, 0x28, 0x0e,
];
println!("\nTook Message of {message_length} bytes");
println!("{} bytes left", data.len());
println!("\nLooking for timestamp...");
for idx in 0..data.len() - looking.len() {
if &data[idx..idx + looking.len()] == looking.as_slice() {
println!("Found! Offset {idx}");
}
}
let magic_id = [76, 69, 76, 82];
let magic_id_skip = 21;
let reserved = [0, 0, 0, 0, 0, 0, 0];
let look_length = magic_id.len() + magic_id_skip + reserved.len();
println!("\nLooking for LELR");
for idx in 0..whole_data.len() - look_length {
if &whole_data[idx..idx + magic_id.len()] == magic_id.as_slice() {
print!("Found! Offset {idx} - ");
let reserved_start = idx + magic_id.len() + magic_id_skip;
if &whole_data[reserved_start..reserved_start + reserved.len()] == reserved.as_slice() {
println!("Reserved matched!");
} else {
println!("No reserve match :(");
}
}
}
let rt = (data.len() as f32 / 2.0).sqrt().floor() as usize;
println!("\n{} png", rt * rt);
println!("{:?}", &data[0..32]);
let width = rt / 8;
let height = rt * 4;
let pixels = width * height;
let file = File::create("ahh.png").unwrap();
let mut enc = png::Encoder::new(file, width as u32, height as u32);
enc.set_color(png::ColorType::Grayscale);
enc.set_depth(png::BitDepth::Sixteen);
let mut writer = enc.write_header().unwrap();
writer
.write_image_data(&data[rt * 3..(rt * 3) + pixels * 2])
.unwrap();
}
struct LightHeader {
magic_number: String,
combined_length: u64,
header_length: u64,
message_length: u32,
// type
kind: u8,
reserved: [u8; 7],
}
impl LightHeader {
pub fn new(data: &[u8]) -> Self {
let magic_number = String::from_utf8(data[0..4].to_vec()).unwrap();
let combined_length = u64::from_le_bytes(data[4..12].try_into().unwrap());
println!("Combined Length: {:?}", &data[4..12]);
let header_length = u64::from_le_bytes(data[12..20].try_into().unwrap());
println!("Header Length: {:?}", &data[12..20]);
let message_length = u32::from_le_bytes(data[20..24].try_into().unwrap());
println!("Message Length: {:?}", &data[20..24]);
let kind = data[24];
let reserved = data[25..32].try_into().unwrap();
LightHeader {
magic_number,
combined_length,
header_length,
message_length,
kind,
reserved,
}
}
}
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