[RUST/HOUND] WavWriter 구조체 : write_sample 메소드를 사용해 사인파 WAV 파일 생성하기

■ WavWriter 구조체의 write_sample 메소드를 사용해 사인파 WAV 파일을 생성하는 방법을 보여준다.

 

▶ Cargo.toml

[package]
name = "test_project"
version = "0.1.0"
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
hound = "3.4.0"

 

▶ src/main.rs

use std::f32::consts;
use std::fs;
use std::io;

use hound;

const SAMPLE_RATE : u32 = 44100;
const TONE        : f32 = 440.0; // 440Hz = A

fn main()
{
    let wav_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE,
        bits_per_sample : 16,
        sample_format   : hound::SampleFormat::Int
    };

    let mut wav_writer : hound::WavWriter<io::BufWriter<fs::File>> = hound::WavWriter::create("d:/target.wav", wav_spec).unwrap();

    let sample_count : u32 = SAMPLE_RATE * 3; // 3초

    for t in 0..sample_count
    {
        let v : f32 = ((t as f32 / SAMPLE_RATE as f32) * TONE * 2.0 * consts::PI).sin();

        wav_writer.write_sample((v * i16::MAX as f32) as i16).unwrap();
    }
}