W1CDN/morse_rs
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made into library, better morse formatting

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ghaisan
2024-10-02 17:44:12 +07:00
parent e3737b3b98
commit 4b0a1981b1
4 changed files with 105 additions and 55 deletions
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src/lib.rs
+102
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@@ -0,0 +1,102 @@
use hound::{self, WavWriter};
use std::collections::HashMap;
use std::f32::consts::PI;
use std::{fs, i16, io};
const SAMPLE_RATE: f32 = 44100.0;
const MORSE_FREQ: f32 = 600.0;
const UNIT_TIME: f32 = 100.0 / 1000.0; // IN MS
const SPEC: hound::WavSpec = hound::WavSpec {
channels: 1,
sample_rate: 44100,
bits_per_sample: 16,
sample_format: hound::SampleFormat::Int,
};
fn write_freq(writer: &mut WavWriter<io::BufWriter<fs::File>>, freq: f32, duration: f32) {
let sample_count = (duration * SAMPLE_RATE).ceil() as i32;
for t in (0..sample_count).map(|x| x as f32 / SAMPLE_RATE) {
let sample = (t * freq * 2.0 * PI).sin();
let amplitude = i16::MAX as f32;
writer.write_sample((sample * amplitude) as i16).unwrap();
}
}
pub fn to_morse(text: &str) -> String {
let morse_map: HashMap<char, &str> = HashMap::from([
('a', ".-"),
('b', "-..."),
('c', "-.-."),
('d', "-.."),
('e', "."),
('f', "..-."),
('g', "--."),
('h', "...."),
('i', ".."),
('j', ".---"),
('k', "-.-"),
('l', ".-.."),
('m', "--"),
('n', "-."),
('o', "---"),
('p', ".--."),
('q', "--.-"),
('r', ".-."),
('s', "..."),
('t', "-"),
('u', "..-"),
('v', "...-"),
('w', ".--"),
('x', "-..-"),
('y', "-.--"),
('z', "--.."),
('1', ".----"),
('2', "..---"),
('3', "...--"),
('4', "....-"),
('5', "....."),
('6', "-...."),
('7', "--..."),
('8', "---.."),
('9', "----."),
('0', "-----"),
]);
let code = text.to_lowercase();
let mut ret = String::new();
for c in code.chars() {
if c == ' ' {
ret += " / ";
} else if let Some(morse) = morse_map.get(&c) {
ret += morse;
}
ret += " ";
}
ret
}
pub fn write_morse(filename: &str, morse: &str) {
let mut writer = hound::WavWriter::create(filename, SPEC).unwrap();
for c in morse.chars() {
// We give a margin of 0.5 * UNIT_TIME between dots and dashes
// give 1.5 * UNIT_TIME between characters
// and give 2 * UNIT_TIME between words
if c == '.' {
write_freq(&mut writer, MORSE_FREQ, UNIT_TIME);
write_freq(&mut writer, 0.0, 0.5 * UNIT_TIME);
} else if c == '-' {
write_freq(&mut writer, MORSE_FREQ, 3.0 * UNIT_TIME);
write_freq(&mut writer, 0.0, 0.5 * UNIT_TIME);
} else if c == ' ' {
write_freq(&mut writer, 0.0, 1.5 * UNIT_TIME);
} else if c == '/' {
write_freq(&mut writer, 0.0, 2.0 * UNIT_TIME);
} else {
panic!("The morse code given is not valid!");
}
}
write_freq(&mut writer, 0.0, UNIT_TIME); // End padding
}
src/main.rs
+3 -55
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@@ -1,59 +1,7 @@
use hound::{self, WavWriter};
use std::f32::consts::PI;
use std::{fs, i16, io};
const SAMPLE_RATE: f32 = 44100.0;
const MORSE_FREQ: f32 = 600.0;
const UNIT_TIME: f32 = 100.0 / 1000.0; // IN MS
const CHAR_TIME: f32 = 50.0 / 1000.0;
const SPEC: hound::WavSpec = hound::WavSpec {
channels: 1,
sample_rate: 44100,
bits_per_sample: 16,
sample_format: hound::SampleFormat::Int,
};
fn write_freq(writer: &mut WavWriter<io::BufWriter<fs::File>>, freq: f32, duration: f32) {
let sample_count = (duration * SAMPLE_RATE).ceil() as i32;
for t in (0..sample_count).map(|x| x as f32 / SAMPLE_RATE) {
let sample = (t * freq * 2.0 * PI).sin();
let amplitude = i16::MAX as f32;
writer.write_sample((sample * amplitude) as i16).unwrap();
}
}
fn write_morse(filename: &str, morse: &str) {
let mut writer = hound::WavWriter::create(filename, SPEC).unwrap();
//for t in (0..sample_count).map(|x| x as f32 / SAMPLE_RATE) {
// let sample = (t * MORSE_FREQ * 2.0 * PI).sin();
// let amplitude = i16::MAX as f32;
// writer.write_sample((sample * amplitude) as i16).unwrap();
//}
for c in morse.chars() {
// We give a margin of CHAR_TIME between dots and dashes
// and we give 1.5 * UNIT_TIME between characters
if c == '.' {
write_freq(&mut writer, MORSE_FREQ, UNIT_TIME);
write_freq(&mut writer, 0.0, CHAR_TIME);
} else if c == '-' {
write_freq(&mut writer, MORSE_FREQ, 3.0 * UNIT_TIME);
write_freq(&mut writer, 0.0, CHAR_TIME);
} else if c == ' ' {
write_freq(&mut writer, 0.0, 1.5 * UNIT_TIME);
} else {
panic!("The morse code given is not valid!");
}
}
write_freq(&mut writer, 0.0, UNIT_TIME); // End padding
}
use morse_translator::{to_morse, write_morse};
fn main() {
// -.. .- -. .. ... ...
let text = to_morse("danish ghaisan");
write_morse("morse_danish.wav", "-.. .- -. .. ... ....");
//write_freq(&mut writer, 350.0, 1.0);
//write_freq(&mut writer, 650.0, 1.0);
write_morse("danish.wav", &text);
}