Update and added ReadMe

This commit is contained in:
Andre Henriques 2021-10-06 17:46:18 +01:00
parent f45a9cf312
commit a51b69ad7c
5 changed files with 176 additions and 816 deletions

101
Cargo.lock generated
View File

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README.md Normal file
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# Frequency detector written in rust
This project started out as a simple humming detector written in rust but, ended up becoming a frequency analyser that uses a Fourier transform to obtain the frequencies of the sound that is being recorded.
But the main goals of the project were still accomplished:
- Improve rust skills
- Learn how to record audio using rust (in Linux)
- Learn the mathematical bases of a Fourier transform
#How to run
```bash
cargo run
```

690
run.txt
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Audio Test:
Geting audio input:
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@ -1,10 +1,10 @@
use cpal::traits::{HostTrait, DeviceTrait, StreamTrait}; use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
use cpal::StreamInstant; use cpal::StreamInstant;
use std::{thread, time};
use std::sync::{Arc, Mutex};
use std::sync::mpsc;
use num_complex::Complex;
use image::{ImageBuffer, RgbImage}; use image::{ImageBuffer, RgbImage};
use num_complex::Complex;
use std::sync::mpsc;
use std::sync::{Arc, Mutex};
use std::{thread, time};
#[derive(Debug)] #[derive(Debug)]
struct MyRecData { struct MyRecData {
@ -17,39 +17,26 @@ struct ProcessData {
data: Vec<f32>, data: Vec<f32>,
} }
const IMAGEX: u32 = 500; const IMAGEX: u32 = 200;
const IMAGEY: u32 = 500; const IMAGEY: u32 = 100;
const STEP: f32 = 20.0;
const START_FREC: f32 = 200.0;
fn generate_buffer() -> RgbImage { fn generate_buffer() -> RgbImage {
ImageBuffer::new(IMAGEX, IMAGEY)
let mut imgbuf: RgbImage = ImageBuffer::new(IMAGEX, IMAGEY);
for i in 0..IMAGEX {
*imgbuf.get_pixel_mut(i, 250) = image::Rgb([255,255,255]);
}
//imgbuf.save("test.png").unwrap();
imgbuf
} }
fn process(p_data: ProcessData, x: u32) { fn process(p_data: ProcessData, x: u32) {
let time = p_data.duration.as_nanos() as f32 / (10.0_f32).powf(9.0); let time = p_data.duration.as_nanos() as f32 / (10.0_f32).powf(9.0);
let mut sum: Complex<f32> = Complex::new(0.0, 0.0);
let test_frec = 440.0f32;
let data_size = p_data.data.len() as u32; let data_size = p_data.data.len() as u32;
let gragh_step = (data_size as f64 / (IMAGEX as f64 - 1.0f64)).floor() as u32; let gragh_step = 20 as u32;
println!("gs:{}", gragh_step);
let step = (time as f32 / data_size as f32) * gragh_step as f32; let step = (time as f32 / data_size as f32) * gragh_step as f32;
let mut i: u32 = 0; let mut i: u32 = 0;
let mut max = 0.0f64; let mut max = 0.0f64;
while i < data_size && i/gragh_step < IMAGEX - 1 { while i < data_size {
if max < *p_data.data.get(i as usize).unwrap() as f64 { if max < *p_data.data.get(i as usize).unwrap() as f64 {
max = *p_data.data.get(i as usize).unwrap() as f64; max = *p_data.data.get(i as usize).unwrap() as f64;
} }
@ -60,29 +47,51 @@ fn process(p_data: ProcessData, x: u32) {
let mut img_buff: RgbImage = generate_buffer(); let mut img_buff: RgbImage = generate_buffer();
i = 0; let mut sum_vec: Vec<Complex<f32>> = vec![];
while i < data_size && i/gragh_step < IMAGEX - 1 { for j in 0..(IMAGEX + 1) {
let y = (250.0f64 - (*p_data.data.get(i as usize).unwrap() as f64 * scale).floor()) as u32; let test_frec: f32 = j as f32 * STEP + START_FREC;
let to_sum = Complex::from_polar(*p_data.data.get(i as usize).unwrap() as f32 * scale as f32, - 2.0 * std::f32::consts::PI * test_frec * ( i as f32/gragh_step as f32) * step); i = 0;
sum += to_sum; while i < data_size {
if y < 500 && y > 0 { let to_sum = Complex::from_polar(
*img_buff.get_pixel_mut((i/gragh_step) as u32, y ) = image::Rgb([0, 255, 255]); *p_data.data.get(i as usize).unwrap() as f32 * scale as f32,
-2.0 * std::f32::consts::PI * test_frec * (i as f32 / gragh_step as f32) * step,
);
if sum_vec.get(j as usize).is_none() {
sum_vec.push(to_sum);
} else {
let a = *sum_vec.get(j as usize).unwrap();
let _ = std::mem::replace(&mut sum_vec[j as usize], a + to_sum);
} }
i += gragh_step; i += gragh_step;
} }
// sum = sum.scale(1.0f32 / (data_size as f32 /gragh_step as f32));
if !sum.re.is_nan() && !sum.im.is_nan() {
println!("center: {}", (sum.im.powf(2.0) + sum.im.powf(2.0)).sqrt() )
} }
let x1 = sum.re + (IMAGEX/2) as f32; let mut max = 0.0f32;
let y1 = sum.im + 250.0; let mut average = 0.0f32;
if x1 > 0.0 && x1 < IMAGEX as f32 && y1 > 0.0 && y1 < 500.0 { let mut possible = 0.0f32;
*img_buff.get_pixel_mut( x1 as u32, y1 as u32 ) = image::Rgb([255, 255, 255]); for i in 0..IMAGEX {
//println!("center"); let v: Complex<f32> = *sum_vec.get(i as usize).unwrap();
if !v.is_nan() {
let v = (v.re.powf(2.0) + v.im.powf(2.0)).sqrt();
if max < v {
max = v;
possible = START_FREC + STEP * i as f32;
}
average += v;
}
}
average = IMAGEY as f32 - (average / IMAGEX as f32) / max * (IMAGEY - 10) as f32;
for i in 0..IMAGEX {
let v: Complex<f32> = *sum_vec.get(i as usize).unwrap();
if !v.is_nan() {
let j = IMAGEY as f32
- ((v.re.powf(2.0) + v.im.powf(2.0)).sqrt() / max) * (IMAGEY - 10) as f32;
*img_buff.get_pixel_mut(i as u32, j.floor() as u32) = image::Rgb([255, 0, 255]);
*img_buff.get_pixel_mut(i as u32, average as u32) = image::Rgb([255, 0, 0]);
}
} }
println!("Processed {}", x); println!("Processed {} {}", x, possible);
img_buff.save(format!("run/process{}.png", x)).unwrap(); img_buff.save(format!("run/process{}.png", x)).unwrap();
} }
@ -94,7 +103,6 @@ fn process(p_data: ProcessData, x: u32) {
//} //}
fn main() { fn main() {
println!("Audio Test:"); println!("Audio Test:");
let host = cpal::default_host(); let host = cpal::default_host();
@ -106,23 +114,38 @@ fn main() {
println!("Geting audio input:"); println!("Geting audio input:");
let device = host.default_input_device().expect("no output device available!"); let device = host
.default_input_device()
.expect("no output device available!");
let mut supported_configs_range = device.supported_input_configs().expect("Error while geting the configs"); let mut supported_configs_range = device
let supported_config = supported_configs_range.next().expect("no supported config").with_max_sample_rate().into(); .supported_input_configs()
.expect("Error while geting the configs");
let supported_config = supported_configs_range
.next()
.expect("no supported config")
.with_max_sample_rate()
.into();
println!("Got config: {:?}", supported_config); println!("Got config: {:?}", supported_config);
let stream = device.build_input_stream(&supported_config, let stream = device
.build_input_stream(
&supported_config,
move |data: &[f32], input_info: &cpal::InputCallbackInfo| { move |data: &[f32], input_info: &cpal::InputCallbackInfo| {
// println!("Data:\n Input info:{:?}", input_info.timestamp().capture); // println!("Data:\n Input info:{:?}", input_info.timestamp().capture);
let mdata = MyRecData {instant: input_info.timestamp().capture, data: data.to_vec()}; let mdata = MyRecData {
instant: input_info.timestamp().capture,
data: data.to_vec(),
};
rec_data_c.lock().ok().unwrap().insert(0, mdata); rec_data_c.lock().ok().unwrap().insert(0, mdata);
() ()
}, },
move |err| { move |err| {
println!("Error: {:?}", err); println!("Error: {:?}", err);
}).expect("Failed to build stream"); },
)
.expect("Failed to build stream");
stream.play().expect("faild to play"); stream.play().expect("faild to play");
@ -165,7 +188,13 @@ fn main() {
last = Some(mdata.instant); last = Some(mdata.instant);
} else { } else {
let instant = mdata.instant.duration_since(&last.unwrap()).unwrap(); let instant = mdata.instant.duration_since(&last.unwrap()).unwrap();
process(ProcessData {duration: instant, data: mdata.data}, x); process(
ProcessData {
duration: instant,
data: mdata.data,
},
x,
);
last = Some(mdata.instant); last = Some(mdata.instant);
// println!("time:{:?}", instant); // println!("time:{:?}", instant);
} }
@ -174,12 +203,11 @@ fn main() {
println!("Stoped processing"); println!("Stoped processing");
}); });
thread::sleep(time::Duration::from_secs(2)); thread::sleep(time::Duration::from_secs(30));
stream.pause().expect("faild to close"); stream.pause().expect("faild to close");
println!("stoping"); println!("stoping");
m_t.send(false).ok(); m_t.send(false).ok();
t.join().unwrap(); t.join().unwrap();
} }

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