135 lines
4.0 KiB
Rust
135 lines
4.0 KiB
Rust
extern crate hound;
|
|
extern crate image;
|
|
|
|
mod utils;
|
|
mod firfilter;
|
|
mod resamplers;
|
|
mod amdemod;
|
|
mod aptsyncer;
|
|
|
|
use std::io::prelude::*;
|
|
use std::fs::File;
|
|
use std::path::Path;
|
|
|
|
use utils::float_sample_iterator;
|
|
use firfilter::FIRFilter;
|
|
use amdemod::SquaringAMDemodulator;
|
|
use resamplers::{Upsampler, Downsampler};
|
|
use aptsyncer::{APTSyncer, SyncedSample};
|
|
|
|
const LINES_PER_SECOND: u32 = 2;
|
|
const PIXELS_PER_LINE: u32 = 2080;
|
|
|
|
const LOWPASS_COEFFS : [f32; 63] = [ -7.383784e-03,
|
|
-3.183046e-03, 2.255039e-03, 7.461166e-03, 1.091908e-02,
|
|
1.149109e-02, 8.769802e-03, 3.252932e-03, -3.720606e-03,
|
|
-1.027446e-02, -1.447403e-02, -1.486427e-02, -1.092423e-02,
|
|
-3.307958e-03, 6.212477e-03, 1.511364e-02, 2.072873e-02,
|
|
2.096037e-02, 1.492345e-02, 3.347624e-03, -1.138407e-02,
|
|
-2.560252e-02, -3.507114e-02, -3.591225e-02, -2.553830e-02,
|
|
-3.371569e-03, 2.882645e-02, 6.711368e-02, 1.060042e-01,
|
|
1.394643e-01, 1.620650e-01, 1.700462e-01, 1.620650e-01,
|
|
1.394643e-01, 1.060042e-01, 6.711368e-02, 2.882645e-02,
|
|
-3.371569e-03, -2.553830e-02, -3.591225e-02, -3.507114e-02,
|
|
-2.560252e-02, -1.138407e-02, 3.347624e-03, 1.492345e-02,
|
|
2.096037e-02, 2.072873e-02, 1.511364e-02, 6.212477e-03,
|
|
-3.307958e-03, -1.092423e-02, -1.486427e-02, -1.447403e-02,
|
|
-1.027446e-02, -3.720606e-03, 3.252932e-03, 8.769802e-03,
|
|
1.149109e-02, 1.091908e-02, 7.461166e-03, 2.255039e-03,
|
|
-3.183046e-03, -7.383784e-03];
|
|
|
|
fn main() {
|
|
let args : Vec<String> = std::env::args().collect();
|
|
|
|
if args.len() != 3 {
|
|
println!("Usage: {} <wav file> <output file>", args[0]);
|
|
return;
|
|
}
|
|
|
|
let mut reader = match hound::WavReader::open(&args[1]) {
|
|
Err(e) => panic!("Could not open inputfile: {}", e),
|
|
Ok(r) => r
|
|
};
|
|
|
|
if reader.spec().channels != 1 {
|
|
panic!("Expected a mono file");
|
|
}
|
|
|
|
let sample_rate = reader.spec().sample_rate;
|
|
println!("Samplerate: {}", sample_rate);
|
|
if sample_rate != 48000 {
|
|
panic!("Expected a 48kHz sample rate");
|
|
}
|
|
|
|
let sample_count = reader.len();
|
|
let seconds = (sample_count as f32) / (sample_rate as f32);
|
|
let lines = (seconds.ceil() as u32) * LINES_PER_SECOND;
|
|
println!("File contains {} seconds or {} lines", seconds, lines);
|
|
|
|
let mut img = image::ImageBuffer::new(PIXELS_PER_LINE, lines);
|
|
|
|
let coeffs = &LOWPASS_COEFFS;
|
|
|
|
let samples = float_sample_iterator(&mut reader);
|
|
|
|
let demod = SquaringAMDemodulator::from(samples);
|
|
let filter = FIRFilter::from(demod, coeffs);
|
|
let upsampler = Upsampler::from(filter, 13);
|
|
let downsampler = Downsampler::from(upsampler, 150);
|
|
let syncer = APTSyncer::from(downsampler);
|
|
|
|
let mut x = 0;
|
|
let mut y = 0;
|
|
let mut max_level = 0.0;
|
|
|
|
let mut progress = 0;
|
|
let step = sample_count * 13 / 150 / 10;
|
|
|
|
print!("0%");
|
|
std::io::stdout().flush().unwrap();
|
|
for synced_sample in syncer {
|
|
progress += 1;
|
|
|
|
if progress % step == 0 {
|
|
print!("...{}%", progress / step * 10);
|
|
std::io::stdout().flush().unwrap();
|
|
}
|
|
|
|
|
|
let sample = match synced_sample {
|
|
SyncedSample::Sample(s) => s,
|
|
SyncedSample::SyncA(s) =>{
|
|
x = 0;
|
|
s
|
|
}
|
|
SyncedSample::SyncB(s) =>{
|
|
x = PIXELS_PER_LINE / 2;
|
|
s
|
|
}
|
|
};
|
|
|
|
max_level = f32::max(sample, max_level);
|
|
let color = (sample / max_level * 255.0) as u8;
|
|
|
|
if y < lines {
|
|
img.put_pixel(x,y,image::Luma([color]));
|
|
}
|
|
|
|
x += 1;
|
|
if x >= PIXELS_PER_LINE {
|
|
x = 0;
|
|
y += 1;
|
|
}
|
|
}
|
|
println!("");
|
|
|
|
let ref mut fout = match File::create(&Path::new(&args[2])) {
|
|
Err(e) => panic!("Could not open outputfile: {}", e),
|
|
Ok(f) => f
|
|
};
|
|
|
|
image::ImageLuma8(img).save(fout, image::PNG).unwrap();
|
|
|
|
println!("Done !");
|
|
}
|