WAV Archives - icodebroker

[RUST/HOUND] WavWriter 구조체 : write_sample 메소드를 사용해 FM(Frequency Modulation) 음원 WAV 파일 생성하기

■ WavWriter 구조체의 write_sample 메소드를 사용해 FM(Frequency Modulation) 음원의 WAV 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


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

[dependencies]
hound = "3.4.0"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

[dependencies]

hound = "3.4.0"

▶ src/fm.rs


use std::f32::consts;

pub const SAMPLE_RATE : f32 = 44100.0;

pub struct Note
{
    pub scale  : i32,       // 음계
    pub length : isize,     // 음표 길이
    pub gain   : f32,       // 음량
    pub params : (f32, f32) // 음색 매개변수
}

pub fn make_fm(wave_vector : &mut Vec<f32>, note : Note)
{
    let frequency : f32 = get_frequency(note.scale);

    let a : f32 = 2.0 * consts::PI * frequency / SAMPLE_RATE;

    let wave_vector_length : usize = note.length as usize;

    let mut temporary_wave_vector1 :Vec<f32> = vec![0.0; wave_vector_length];

    for i in 0..(note.length as usize)
    {
        let t : f32 = i as f32;

        let sin1 : f32 = note.params.0 * (a * t).sin();
        let sin2 : f32 = note.params.1 * (a * t + sin1).sin();
        let sin3 : f32 = (a * t + sin2).sin();

        temporary_wave_vector1[i] = sin3;
    }

    let attack  : usize = 3;
    let decay   : usize = attack + 200;
    let sustain : f32 = 0.90;
    let release : usize = (wave_vector_length as f32 * 0.4) as usize;

    let temporary_wave_vector2 : Vec<f32> = temporary_wave_vector1.into_iter().enumerate().map
    (
        |(index, value)|
        {
            let v1 : f32 = (value * note.gain) as f32;

            if index < attack { return index as f32 / attack as f32 * v1; }

            let v2 : f32 = v1 * sustain;

            if index < decay
            {
                let dec : f32 = (1.0 - (index as f32 / decay as f32)) * (1.0 - sustain) * v1.abs();

                return if v2 > 0.0 { v1 + dec } else { v1 - dec }
            }
            else if index > (wave_vector_length - release)
            {
                let i : usize = index - (wave_vector_length - release);

                return (1.0 - i as f32 / release as f32) * v2;
            }

            return v2;
        }
    ).collect();

    wave_vector.extend(temporary_wave_vector2);

}

// bpm  : 분당 박자, beats per minute
// note : 음표 예) 4(4분 음표)
pub fn calculate_note_length(bpm : usize, note : usize) -> isize
{
    return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as isize;
}

// scale : 음계, 예) 60(도), 64(미), 67(솔)
fn get_frequency(scale : i32) -> f32
{
    return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);
}

use std::f32::consts;

pub const SAMPLE_RATE : f32 = 44100.0;

pub struct Note

{

pub scale : i32, // 음계

pub length : isize, // 음표 길이

pub gain : f32, // 음량

pub params : (f32, f32) // 음색 매개변수

}

pub fn make_fm(wave_vector : &mut Vec<f32>, note : Note)

{

let frequency : f32 = get_frequency(note.scale);

let a : f32 = 2.0 * consts::PI * frequency / SAMPLE_RATE;

let wave_vector_length : usize = note.length as usize;

let mut temporary_wave_vector1 :Vec<f32> = vec![0.0; wave_vector_length];

for i in 0..(note.length as usize)

{

let t : f32 = i as f32;

let sin1 : f32 = note.params.0 * (a * t).sin();

let sin2 : f32 = note.params.1 * (a * t + sin1).sin();

let sin3 : f32 = (a * t + sin2).sin();

temporary_wave_vector1[i] = sin3;

}

let attack : usize = 3;

let decay : usize = attack + 200;

let sustain : f32 = 0.90;

let release : usize = (wave_vector_length as f32 * 0.4) as usize;

let temporary_wave_vector2 : Vec<f32> = temporary_wave_vector1.into_iter().enumerate().map

(

|(index, value)|

{

let v1 : f32 = (value * note.gain) as f32;

if index < attack { return index as f32 / attack as f32 * v1; }

let v2 : f32 = v1 * sustain;

if index < decay

{

let dec : f32 = (1.0 - (index as f32 / decay as f32)) * (1.0 - sustain) * v1.abs();

return if v2 > 0.0 { v1 + dec } else { v1 - dec }

}

else if index > (wave_vector_length - release)

{

let i : usize = index - (wave_vector_length - release);

return (1.0 - i as f32 / release as f32) * v2;

}

return v2;

}

).collect();

wave_vector.extend(temporary_wave_vector2);

}

// bpm : 분당 박자, beats per minute

// note : 음표 예) 4(4분 음표)

pub fn calculate_note_length(bpm : usize, note : usize) -> isize

{

return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as isize;

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

fn get_frequency(scale : i32) -> f32

{

return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);

}

▶ src/main.rs

[RUST/HOUND] WavWriter 구조체 : write_sample 메소드를 사용해 펄스파(pulse wave) WAV 파일 생성하기

■ WavWriter 구조체의 write_sample 메소드를 사용해 펄스파(pulse wave)의 WAV 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


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

[dependencies]
hound = "3.4.0"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

[dependencies]

hound = "3.4.0"

▶ src/main.rs


use std::fs;
use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()
{
    let wav_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE as u32,
        bits_per_sample : 32,
        sample_format   : hound::SampleFormat::Float
    };

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

    let mut wave_vector : Vec<f32> = vec![];

    let bpm : usize = 120;

    [0.3, 0.1, 0.7, 0.5].iter().for_each
    (
        |duty : &f32|
        {
            [60, 64, 67, 72].iter().for_each
            (
                |scale : &i32|
                {
                    wave_vector.extend(get_pulse_wave_vector(*scale, calculate_note_length(bpm, 4), 0.5, *duty));
                }
            );
        }
    );

    for value in wave_vector.into_iter()
    {
        wav_writer.write_sample(value).unwrap();
    }
}

// scale : 음계, 예) 60(도), 64(미), 67(솔)
fn get_frequency(scale : i32) -> f32
{
    return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);
}

// bpm  : 분당 박자, beats per minute
// note : 음표 예) 4(4분 음표)
fn calculate_note_length(bpm : usize, note : usize) -> usize
{
    return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as usize;
}

// scale       : 음계, 예) 60(도), 64(미), 67(솔)
// note_length : 음표 길이 (샘플 수)
// gain        : 출력
// duty        : 듀티
fn get_pulse_wave_vector(scale : i32, note_length : usize, gain : f32, duty : f32) -> Vec<f32>
{
    let frequency : f32 = get_frequency(scale);

    let interval : f32 = SAMPLE_RATE / frequency;

    let mut wave_vector : Vec<f32> = vec![0.0; note_length];

    for i in 0..note_length
    {
        let saw : f32 = (i as f32 / interval) % 1.0;

        wave_vector[i] = if saw > duty { -1.0 } else { 1.0 };
    }

    return wave_vector.into_iter().map(|v: f32| (v * gain) as f32).collect();
}

use std::fs;

use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()

{

let wav_spec : hound::WavSpec = hound::WavSpec

{

channels : 1,

sample_rate : SAMPLE_RATE as u32,

bits_per_sample : 32,

sample_format : hound::SampleFormat::Float

};

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

let mut wave_vector : Vec<f32> = vec![];

let bpm : usize = 120;

[0.3, 0.1, 0.7, 0.5].iter().for_each

(

|duty : &f32|

{

[60, 64, 67, 72].iter().for_each

(

|scale : &i32|

{

wave_vector.extend(get_pulse_wave_vector(*scale, calculate_note_length(bpm, 4), 0.5, *duty));

}

);

}

);

for value in wave_vector.into_iter()

{

wav_writer.write_sample(value).unwrap();

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

fn get_frequency(scale : i32) -> f32

{

return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);

}

// bpm : 분당 박자, beats per minute

// note : 음표 예) 4(4분 음표)

fn calculate_note_length(bpm : usize, note : usize) -> usize

{

return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as usize;

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

// note_length : 음표 길이 (샘플 수)

// gain : 출력

// duty : 듀티

fn get_pulse_wave_vector(scale : i32, note_length : usize, gain : f32, duty : f32) -> Vec<f32>

{

let frequency : f32 = get_frequency(scale);

let interval : f32 = SAMPLE_RATE / frequency;

let mut wave_vector : Vec<f32> = vec![0.0; note_length];

for i in 0..note_length

{

let saw : f32 = (i as f32 / interval) % 1.0;

wave_vector[i] = if saw > duty { -1.0 } else { 1.0 };

}

return wave_vector.into_iter().map(|v: f32| (v * gain) as f32).collect();

}

test_project.zip

[RUST/HOUND] WavWriter 구조체 : write_sample 메소드를 사용해 백색 잡음(white noise) WAV 파일 생성하기

■ WavWriter 구조체의 write_sample 메소드를 사용해 백색 잡음(white noise)의 WAV 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


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

[dependencies]
hound = "3.4.0"
rand = "0.8.4"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

[dependencies]

hound = "3.4.0"

rand = "0.8.4"

▶ src/main.rs


use std::fs;
use std::io;

use hound;
use rand::prelude::*;

const SAMPLE_RATE : f32 = 44100.0;

fn main()
{
    let wav_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE as u32,
        bits_per_sample : 32,
        sample_format   : hound::SampleFormat::Float
    };

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

    let mut wave_vector : Vec<f32> = vec![];

    let bpm : usize = 120;

    wave_vector.extend(get_noise_wave_vector(2.0, -1.0, calculate_note_length(bpm, 2)));
    wave_vector.extend(get_noise_wave_vector(0.2,  0.8, calculate_note_length(bpm, 2)));
    wave_vector.extend(get_noise_wave_vector(0.8, -1.0, calculate_note_length(bpm, 2)));

    for value in wave_vector.into_iter()
    {
        wave_writer.write_sample(value).unwrap();
    }
}

// bpm  : 분당 박자, beats per minute
// note : 음표 예) 4(4분 음표)
fn calculate_note_length(bpm : usize, note: usize) -> usize
{
    return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as usize;
}

// range       : 범위
// shift       : 시프트
// note_length : 음표 길이 (샘플 수)
fn get_noise_wave_vector(range : f32, shift : f32, note_length : usize) -> Vec<f32>
{
    let mut wave_vector : Vec<f32> = vec![0.0; note_length];

    let mut thread_rng : ThreadRng = rand::thread_rng();

    for i in 0..note_length
    {
        wave_vector[i] = thread_rng.gen::<f32>() * range + shift;
    }

    let gain : f32 = 0.5;

    return wave_vector.into_iter().map(|v : f32| (v * gain) as f32).collect();
}

use std::fs;

use std::io;

use hound;

use rand::prelude::*;

const SAMPLE_RATE : f32 = 44100.0;

fn main()

{

let wav_spec : hound::WavSpec = hound::WavSpec

{

channels : 1,

sample_rate : SAMPLE_RATE as u32,

bits_per_sample : 32,

sample_format : hound::SampleFormat::Float

};

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

let mut wave_vector : Vec<f32> = vec![];

let bpm : usize = 120;

wave_vector.extend(get_noise_wave_vector(2.0, -1.0, calculate_note_length(bpm, 2)));

wave_vector.extend(get_noise_wave_vector(0.2, 0.8, calculate_note_length(bpm, 2)));

wave_vector.extend(get_noise_wave_vector(0.8, -1.0, calculate_note_length(bpm, 2)));

for value in wave_vector.into_iter()

{

wave_writer.write_sample(value).unwrap();

}

// bpm : 분당 박자, beats per minute

// note : 음표 예) 4(4분 음표)

fn calculate_note_length(bpm : usize, note: usize) -> usize

{

return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as usize;

}

// range : 범위

// shift : 시프트

// note_length : 음표 길이 (샘플 수)

fn get_noise_wave_vector(range : f32, shift : f32, note_length : usize) -> Vec<f32>

{

let mut wave_vector : Vec<f32> = vec![0.0; note_length];

let mut thread_rng : ThreadRng = rand::thread_rng();

for i in 0..note_length

{

wave_vector[i] = thread_rng.gen::<f32>() * range + shift;

}

let gain : f32 = 0.5;

return wave_vector.into_iter().map(|v : f32| (v * gain) as f32).collect();

}

test_project.zip

[RUST/HOUND] WavWriter 구조체 : write_sample 메소드를 사용해 삼각파(triangle wave) WAV 파일 생성하기

■ WavWriter 구조체의 write_sample 메소드를 사용해 삼각파(triangle wave)의 WAV 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


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

[dependencies]
hound = "3.4.0"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

[dependencies]

hound = "3.4.0"

▶ src/main.rs


use std::fs;
use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()
{
    let wav_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE as u32,
        bits_per_sample : 32,
        sample_format   : hound::SampleFormat::Float,
    };

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

    let mut wave_vector : Vec<f32> = vec![];

    let bpm : usize = 120;

    [60, 64, 67, 64, 60, 64, 67, 72].iter().for_each
    (
        |scale: &i32|
        {
            wave_vector.extend(get_triangle_wave_vector(*scale, calculate_note_length(bpm, 8), 0.5));
        }
    );

    for wave in wave_vector.into_iter()
    {
        wav_writer.write_sample(wave).unwrap();
    }
}

// scale : 음계, 예) 60(도), 64(미), 67(솔)
fn get_frequency(scale : i32) -> f32
{
    return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);
}

// bpm  : 분당 박자, beats per minute
// note : 음표 예) 4(4분 음표)
fn calculate_note_length(bpm : usize, note : usize) -> usize
{
    return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as usize;
}

// scale       : 음계, 예) 60(도), 64(미), 67(솔)
// note_length : 음표 길이 (샘플 수)
// gain        : 출력
fn get_triangle_wave_vector(scale : i32, note_length : usize, gain : f32) -> Vec<f32>
{
    let frequency : f32 = get_frequency(scale);

    let interval : f32 = SAMPLE_RATE / frequency;

    let mut wave_vector : Vec<f32> = vec![0.0; note_length];

    let half_interval : f32 = interval / 2.0;

    for i in 0..note_length
    {
        let temporary_value : f32 = i as f32 / half_interval;

        let mut value : f32 = 2.0 * (temporary_value % 1.0) - 1.0;

        let is_climbing : bool = temporary_value.floor() as usize % 2 == 0;

        value = if is_climbing { value } else { -value };

        wave_vector[i] = value;
    }

    return wave_vector.into_iter().map(|value : f32| (value * gain) as f32).collect();
}

use std::fs;

use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()

{

let wav_spec : hound::WavSpec = hound::WavSpec

{

channels : 1,

sample_rate : SAMPLE_RATE as u32,

bits_per_sample : 32,

sample_format : hound::SampleFormat::Float,

};

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

let mut wave_vector : Vec<f32> = vec![];

let bpm : usize = 120;

[60, 64, 67, 64, 60, 64, 67, 72].iter().for_each

(

|scale: &i32|

{

wave_vector.extend(get_triangle_wave_vector(*scale, calculate_note_length(bpm, 8), 0.5));

}

);

for wave in wave_vector.into_iter()

{

wav_writer.write_sample(wave).unwrap();

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

fn get_frequency(scale : i32) -> f32

{

return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);

}

// bpm : 분당 박자, beats per minute

// note : 음표 예) 4(4분 음표)

fn calculate_note_length(bpm : usize, note : usize) -> usize

{

return ((4.0 / note as f32) * (60.0 / bpm as f32) * SAMPLE_RATE) as usize;

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

// note_length : 음표 길이 (샘플 수)

// gain : 출력

fn get_triangle_wave_vector(scale : i32, note_length : usize, gain : f32) -> Vec<f32>

{

let frequency : f32 = get_frequency(scale);

let interval : f32 = SAMPLE_RATE / frequency;

let mut wave_vector : Vec<f32> = vec![0.0; note_length];

let half_interval : f32 = interval / 2.0;

for i in 0..note_length

{

let temporary_value : f32 = i as f32 / half_interval;

let mut value : f32 = 2.0 * (temporary_value % 1.0) - 1.0;

let is_climbing : bool = temporary_value.floor() as usize % 2 == 0;

value = if is_climbing { value } else { -value };

wave_vector[i] = value;

}

return wave_vector.into_iter().map(|value : f32| (value * gain) as f32).collect();

}

test_project.zip

[RUST/HOUND] WavWriter 구조체 : write_sample 메소드를 사용해 방형파(square wave) WAV 파일 생성하기

■ WavWriter 구조체의 write_sample 메소드를 사용해 방형파(square wave)의 WAV 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


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

[dependencies]
hound = "3.4.0"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

[dependencies]

hound = "3.4.0"

▶ src/main.rs


use std::fs;
use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()
{
    let wav_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE as u32,
        bits_per_sample : 32,
        sample_format   : hound::SampleFormat::Float,
    };

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

    let mut wave_vector : Vec<f32> = vec![];

    let bpm : usize = 120;

    [60, 64, 67, 64, 60, 64, 67, 72].iter().for_each
    (
        |sacle : &i32|
        {
            wave_vector.extend(get_square_wave_vector(*sacle, calculate_note_length(bpm, 8), 0.5));
        }
    );

    for v in wave_vector.into_iter()
    {
        wave_writer.write_sample(v).unwrap();
    }
}

// scale : 음계, 예) 60(도), 64(미), 67(솔)
fn get_frequency(scale : i32) -> f32
{
    return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);
}

// bpm  : 분당 박자, beats per minute
// note : 음표 예) 4(4분 음표)
fn calculate_note_length(bpm : usize, note : usize) -> usize
{
    let base_length : f32 = (60.0 / bpm as f32) * SAMPLE_RATE;

    return ((4.0 / note as f32) * base_length) as usize;
}

// scale       : 음계, 예) 60(도), 64(미), 67(솔)
// note_length : 음표 길이 (샘플 수)
// gain        : 출력
fn get_square_wave_vector(scale : i32, note_length : usize, gain : f32) -> Vec<f32>
{
    let frequency : f32 = get_frequency(scale);

    let interval : f32 = SAMPLE_RATE / frequency;

    let mut wave_vector :Vec<f32> = vec![0.0; note_length];

    let half_frequency : usize = (interval / 2.0) as usize;

    for i in 0..note_length
    {
        let value : usize = (i / half_frequency) % 2;

        wave_vector[i] = if value == 0 { -1.0 } else { 1.0 };
    }

    wave_vector.into_iter().map(|v| (v * gain) as f32).collect()
}

use std::fs;

use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()

{

let wav_spec : hound::WavSpec = hound::WavSpec

{

channels : 1,

sample_rate : SAMPLE_RATE as u32,

bits_per_sample : 32,

sample_format : hound::SampleFormat::Float,

};

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

let mut wave_vector : Vec<f32> = vec![];

let bpm : usize = 120;

[60, 64, 67, 64, 60, 64, 67, 72].iter().for_each

(

|sacle : &i32|

{

wave_vector.extend(get_square_wave_vector(*sacle, calculate_note_length(bpm, 8), 0.5));

}

);

for v in wave_vector.into_iter()

{

wave_writer.write_sample(v).unwrap();

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

fn get_frequency(scale : i32) -> f32

{

return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);

}

// bpm : 분당 박자, beats per minute

// note : 음표 예) 4(4분 음표)

fn calculate_note_length(bpm : usize, note : usize) -> usize

{

let base_length : f32 = (60.0 / bpm as f32) * SAMPLE_RATE;

return ((4.0 / note as f32) * base_length) as usize;

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

// note_length : 음표 길이 (샘플 수)

// gain : 출력

fn get_square_wave_vector(scale : i32, note_length : usize, gain : f32) -> Vec<f32>

{

let frequency : f32 = get_frequency(scale);

let interval : f32 = SAMPLE_RATE / frequency;

let mut wave_vector :Vec<f32> = vec![0.0; note_length];

let half_frequency : usize = (interval / 2.0) as usize;

for i in 0..note_length

{

let value : usize = (i / half_frequency) % 2;

wave_vector[i] = if value == 0 { -1.0 } else { 1.0 };

}

wave_vector.into_iter().map(|v| (v * gain) as f32).collect()

}

test_project.zip

[RUST/HOUND] 음정에서 주파수 구하기

■ 음정에서 주파수를 구하는 방법을 보여준다. ▶ 예제 코드 (RS)


fn get_frequency(note : i32) -> f32
{
    return 440.0 * 2.0f32.powf((note - 69) as f32 / 12.0);
}

println!("{}", get_frequency(60)); // 도
println!("{}", get_frequency(64)); // 미
println!("{}", get_frequency(67)); // 솔

/*
261.62555
329.62756
391.99542
*/

fn get_frequency(note : i32) -> f32

{

return 440.0 * 2.0f32.powf((note - 69) as f32 / 12.0);

}

println!("{}", get_frequency(60)); // 도

println!("{}", get_frequency(64)); // 미

println!("{}", get_frequency(67)); // 솔

261.62555

329.62756

391.99542

[RUST/HOUND] WavWriter 구조체 : write_sample 메소드를 사용해 톱니파(sawtooth wave) WAV 파일 생성하기

■ WavWriter 구조체의 write_sample 메소드를 사용해 톱니파(sawtooth wave)의 WAV 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


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

[dependencies]
hound = "3.4.0"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

[dependencies]

hound = "3.4.0"

▶ src/main.rs


use std::io;
use std::fs;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()
{
    let wav_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE as u32,
        bits_per_sample : 32,
        sample_format   : hound::SampleFormat::Float,
    };

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

    let mut wave_vector : Vec<f32> = vec![];
    let bpm             : usize    = 120;

    wave_vector.extend(get_sawtooth_wave_vector(60, calculate_note_length(bpm, 4), 0.5));
    wave_vector.extend(get_sawtooth_wave_vector(64, calculate_note_length(bpm, 4), 0.5));
    wave_vector.extend(get_sawtooth_wave_vector(67, calculate_note_length(bpm, 4), 0.5));

    for v in wave_vector.into_iter()
    {
        wav_writer.write_sample(v).unwrap();
    }
}

// scale : 음계, 예) 60(도), 64(미), 67(솔)
fn get_frequency(scale : i32) -> f32
{
    return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);
}

// bpm  : 분당 박자, beats per minute
// note : 음표 예) 4(4분 음표)
fn calculate_note_length(bpm : usize, note : usize) -> usize
{
    let base_length : f32 = (60.0 / bpm as f32) * SAMPLE_RATE;

    return ((4.0 / note as f32) * base_length) as usize;
}

// scale       : 음계, 예) 60(도), 64(미), 67(솔)
// note_length : 음표 길이 (샘플 수)
// gain        : 출력
fn get_sawtooth_wave_vector(scale : i32, note_length : usize, gain : f32) -> Vec<f32>
{
    let frequency : f32 = get_frequency(scale);

    let interval : f32 = SAMPLE_RATE / frequency;

    let mut wave_vector : Vec<f32> = vec![0.0; note_length];

    for i in 0..note_length
    {
        let pif : f32 = (i as f32 / interval) % 1.0;

        wave_vector[i] = pif * 2.0 - 1.0;
    }

    return wave_vector.into_iter().map(|value : f32| (value * gain) as f32).collect();
}

use std::io;

use std::fs;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

fn main()

{

let wav_spec : hound::WavSpec = hound::WavSpec

{

channels : 1,

sample_rate : SAMPLE_RATE as u32,

bits_per_sample : 32,

sample_format : hound::SampleFormat::Float,

};

let mut wav_writer : hound::WavWriter<io::BufWriter<fs::File>> = hound::WavWriter::create

(

"d:/saw.wav",

wav_spec

).unwrap();

let mut wave_vector : Vec<f32> = vec![];

let bpm : usize = 120;

wave_vector.extend(get_sawtooth_wave_vector(60, calculate_note_length(bpm, 4), 0.5));

wave_vector.extend(get_sawtooth_wave_vector(64, calculate_note_length(bpm, 4), 0.5));

wave_vector.extend(get_sawtooth_wave_vector(67, calculate_note_length(bpm, 4), 0.5));

for v in wave_vector.into_iter()

{

wav_writer.write_sample(v).unwrap();

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

fn get_frequency(scale : i32) -> f32

{

return 440.0 * 2.0f32.powf((scale - 69) as f32 / 12.0);

}

// bpm : 분당 박자, beats per minute

// note : 음표 예) 4(4분 음표)

fn calculate_note_length(bpm : usize, note : usize) -> usize

{

let base_length : f32 = (60.0 / bpm as f32) * SAMPLE_RATE;

return ((4.0 / note as f32) * base_length) as usize;

}

// scale : 음계, 예) 60(도), 64(미), 67(솔)

// note_length : 음표 길이 (샘플 수)

// gain : 출력

fn get_sawtooth_wave_vector(scale : i32, note_length : usize, gain : f32) -> Vec<f32>

{

let frequency : f32 = get_frequency(scale);

let interval : f32 = SAMPLE_RATE / frequency;

let mut wave_vector : Vec<f32> = vec![0.0; note_length];

for i in 0..note_length

{

let pif : f32 = (i as f32 / interval) % 1.0;

wave_vector[i] = pif * 2.0 - 1.0;

}

return wave_vector.into_iter().map(|value : f32| (value * gain) as f32).collect();

}

test_project.zip

[RUST/HOUND] MML(Music Macro Language) 연주기 만들기

■ MML(Music Macro Language) 연주기를 만드는 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"

[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"

▶ wav_writer.rs


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

use hound;

const SAMPLE_RATE : f32 = 44100.0;

#[derive(Debug)]
pub struct Note
{
    pub note   : i32,
    pub length : i32
}

pub fn write(file_path : &str, note_vector : Vec<Note>, bpm : f32)
{
    let wac_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE as u32,
        bits_per_sample : 16,
        sample_format   : hound::SampleFormat::Int
    };

    let mut wav_writer : hound::WavWriter<io::BufWriter<fs::File>> = hound::WavWriter::create(file_path, wac_spec).unwrap();

    for note in note_vector.into_iter()
    {
        let length : u32 = (4.0 / note.length as f32 * (60.0 / bpm) * SAMPLE_RATE) as u32;

        let tone : f32 = if note.note >= 0 { 440.0 * 2.0f32.powf((note.note - 69) as f32 / 12.0) } else { 0.0 };

        write_tone(&mut wav_writer, tone, length);
    }
}

fn write_tone<W>(wav_writer : &mut hound::WavWriter<W>, tone : f32, length : u32) where W: io::Write + io::Seek
{
    for t in 0..length
    {
        let a : f32 = t as f32 / SAMPLE_RATE;
        let v : f32 = (a * tone * 2.0  * consts::PI).sin();

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

use std::f32::consts;

use std::fs;

use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

#[derive(Debug)]

pub struct Note

{

pub note : i32,

pub length : i32

}

pub fn write(file_path : &str, note_vector : Vec<Note>, bpm : f32)

{

let wac_spec : hound::WavSpec = hound::WavSpec

{

channels : 1,

sample_rate : SAMPLE_RATE as u32,

bits_per_sample : 16,

sample_format : hound::SampleFormat::Int

};

let mut wav_writer : hound::WavWriter<io::BufWriter<fs::File>> = hound::WavWriter::create(file_path, wac_spec).unwrap();

for note in note_vector.into_iter()

{

let length : u32 = (4.0 / note.length as f32 * (60.0 / bpm) * SAMPLE_RATE) as u32;

let tone : f32 = if note.note >= 0 { 440.0 * 2.0f32.powf((note.note - 69) as f32 / 12.0) } else { 0.0 };

write_tone(&mut wav_writer, tone, length);

}

fn write_tone<W>(wav_writer : &mut hound::WavWriter<W>, tone : f32, length : u32) where W: io::Write + io::Seek

{

for t in 0..length

{

let a : f32 = t as f32 / SAMPLE_RATE;

let v : f32 = (a * tone * 2.0 * consts::PI).sin();

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

}

▶ mml_parser.rs


use std::str;

use crate::wav_writer::Note;

pub fn parse(source_string : String) -> Vec<Note>
{
    let mut note_vector : Vec<Note> = vec![];
    let mut octave      : i32 = 5;
    let mut length      : i32 = 4;

    let mut chars : str::Chars = source_string.chars();

    while let Some(character) = chars.next()
    {
        match character
        {
            'a'..='g' =>
            {
                let note : i32 = match character
                {
                    'c' => 0,
                    'd' => 2,
                    'e' => 4,
                    'f' => 5,
                    'g' => 7,
                    'a' => 9,
                    'b' => 11,
                    _   => 0
                };

                let target_note : i32 = note + octave * 12;

                note_vector.push(Note { note : target_note, length });
            },
            'r' =>
            {
                note_vector.push(Note { note : -1, length });
            },
            'o' =>
            {
                let v : char = chars.next().expect("o 다음에 숫자를 지정해주시기 바랍니다.");
                let o : i32 = v as i32 - '0' as i32;

                if o >= 0 && o < 9
                {
                    octave = o;
                }
            },
            'l' =>
            {
                let v : char = chars.next().expect("l 다음에 숫자를 지정해주시기 바랍니다.");
                let l : i32 = v as i32 - '0' as i32;

                if l >= 1 && l <= 9
                {
                    length = l;
                }
            },
            _ => {},
        };
    }

    return note_vector;
}

use std::str;

use crate::wav_writer::Note;

pub fn parse(source_string : String) -> Vec<Note>

{

let mut note_vector : Vec<Note> = vec![];

let mut octave : i32 = 5;

let mut length : i32 = 4;

let mut chars : str::Chars = source_string.chars();

while let Some(character) = chars.next()

{

match character

{

'a'..='g' =>

{

let note : i32 = match character

{

'c' => 0,

'd' => 2,

'e' => 4,

'f' => 5,

'g' => 7,

'a' => 9,

'b' => 11,

_ => 0

};

let target_note : i32 = note + octave * 12;

note_vector.push(Note { note : target_note, length });

'r' =>

{

note_vector.push(Note { note : -1, length });

'o' =>

{

let v : char = chars.next().expect("o 다음에 숫자를 지정해주시기 바랍니다.");

let o : i32 = v as i32 - '0' as i32;

if o >= 0 && o < 9

{

octave = o;

}

'l' =>

{

let v : char = chars.next().expect("l 다음에 숫자를 지정해주시기 바랍니다.");

let l : i32 = v as i32 - '0' as i32;

if l >= 1 && l <= 9

{

length = l;

}

_ => {},

};

}

return note_vector;

}

▶ main.rs


mod mml_parser;
mod wav_writer;

fn main()
{
    let bpm : f32 = 120.0;

    // 산토끼
    let mml_string1 : String = format!
    (
        "{}{}",
        "o4 l4 g l8 ee g e l4 cd l8 edce l4 gs",
        "o5 l8 c o4 l8 g o5 l8 c o4 g o5 c o4 g l4 e g l8 d fed l4 c"
    );

    let note_vector1 : Vec<wav_writer::Note> = mml_parser::parse(mml_string1);

    wav_writer::write("d:/rabbit.wav", note_vector1, bpm);

    // 작은별
    let mml_string2 : String = format!
    (
        "{}{}{}",
        "o5 l4 ccgg aal2g l4 ffee ddl2c",
        "l4 ggff eel2d l4 ggff eel2d",
        "l4 ccgg aal2g l4 ffee ddl2c"
    );

    let note_vector2 : Vec<wav_writer::Note> = mml_parser::parse(mml_string2);

    wav_writer::write("d:/twinkle_star.wav", note_vector2, bpm);
}

mod mml_parser;

mod wav_writer;

fn main()

{

let bpm : f32 = 120.0;

// 산토끼

let mml_string1 : String = format!

(

"{}{}",

"o4 l4 g l8 ee g e l4 cd l8 edce l4 gs",

"o5 l8 c o4 l8 g o5 l8 c o4 g o5 c o4 g l4 e g l8 d fed l4 c"

);

let note_vector1 : Vec<wav_writer::Note> = mml_parser::parse(mml_string1);

wav_writer::write("d:/rabbit.wav", note_vector1, bpm);

// 작은별

let mml_string2 : String = format!

(

"{}{}{}",

"o5 l4 ccgg aal2g l4 ffee ddl2c",

"l4 ggff eel2d l4 ggff eel2d",

"l4 ccgg aal2g l4 ffee ddl2c"

);

let note_vector2 : Vec<wav_writer::Note> = mml_parser::parse(mml_string2);

wav_writer::write("d:/twinkle_star.wav", note_vector2, bpm);

}

test_project.zip

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

■ WavWriter 구조체의 write_sample 메소드를 사용해 동요 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"

[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 : f32 = 44100.0;
const BPM         : f32 = 122.0; // 템포

#[allow(unused_variables)]
fn main()
{
    let wav_spec : hound::WavSpec = hound::WavSpec
    {
        channels        : 1,
        sample_rate     : SAMPLE_RATE as u32,
        bits_per_sample : 16,
        sample_format   : hound::SampleFormat::Int
    };

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

    // 음정
    let c4 : f32 = 261.626; // 도
    let d4 : f32 = 293.665; // 레
    let e4 : f32 = 329.628; // 미
    let f4 : f32 = 349.228; // 파
    let g4 : f32 = 391.995; // 솔
    let a4 : f32 = 440.000; // 라
    let b4 : f32 = 493.883; // 시
    let c5 : f32 = 523.251; // 도

    // 음 길이
    let l4 : u32 = ((60.0 / BPM) * SAMPLE_RATE) as u32;
    let l2 : u32 = l4 * 2;

    write_tone(&mut wav_writer, g4, l4); // 솔
    write_tone(&mut wav_writer, g4, l4); // 솔
    write_tone(&mut wav_writer, a4, l4); // 라
    write_tone(&mut wav_writer, a4, l4); // 라
    write_tone(&mut wav_writer, g4, l4); // 솔
    write_tone(&mut wav_writer, g4, l4); // 솔
    write_tone(&mut wav_writer, e4, l2); // 미
    write_tone(&mut wav_writer, g4, l4); // 솔
    write_tone(&mut wav_writer, g4, l4); // 솔
    write_tone(&mut wav_writer, e4, l4); // 미
    write_tone(&mut wav_writer, e4, l4); // 미
    write_tone(&mut wav_writer, d4, l2); // 레
}

fn write_tone<W>(wav_writer : &mut hound::WavWriter<W>, tone : f32, length : u32) where W : io::Write + io::Seek
{
    for t in 0..length
    {
        let a : f32 = t as f32 / SAMPLE_RATE;
        let v : f32 = (a * tone * 2.0  * consts::PI).sin();

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

use std::f32::consts;

use std::fs;

use std::io;

use hound;

const SAMPLE_RATE : f32 = 44100.0;

const BPM : f32 = 122.0; // 템포

#[allow(unused_variables)]

fn main()

{

let wav_spec : hound::WavSpec = hound::WavSpec

{

channels : 1,

sample_rate : SAMPLE_RATE as u32,

bits_per_sample : 16,

sample_format : hound::SampleFormat::Int

};

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

// 음정

let c4 : f32 = 261.626; // 도

let d4 : f32 = 293.665; // 레

let e4 : f32 = 329.628; // 미

let f4 : f32 = 349.228; // 파

let g4 : f32 = 391.995; // 솔

let a4 : f32 = 440.000; // 라

let b4 : f32 = 493.883; // 시

let c5 : f32 = 523.251; // 도

// 음 길이

let l4 : u32 = ((60.0 / BPM) * SAMPLE_RATE) as u32;

let l2 : u32 = l4 * 2;

write_tone(&mut wav_writer, g4, l4); // 솔

write_tone(&mut wav_writer, a4, l4); // 라

write_tone(&mut wav_writer, g4, l4); // 솔

write_tone(&mut wav_writer, e4, l2); // 미

write_tone(&mut wav_writer, g4, l4); // 솔

write_tone(&mut wav_writer, e4, l4); // 미

write_tone(&mut wav_writer, d4, l2); // 레

}

fn write_tone<W>(wav_writer : &mut hound::WavWriter<W>, tone : f32, length : u32) where W : io::Write + io::Seek

{

for t in 0..length

{

let a : f32 = t as f32 / SAMPLE_RATE;

let v : f32 = (a * tone * 2.0 * consts::PI).sin();

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

}

test_project.zip

[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"

[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();
    }
}

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();

}

test_project.zip

[C#/WINFORM/.NET5] WaveInEvent 클래스 : WAV 파일 레코딩하기

■ WaveInEvent 클래스를 사용해 WAV 파일을 레코딩하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.IO;
using System.Windows.Forms;

using NAudio.Wave;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 타겟 디렉토리 경로
        /// </summary>
        private string targetDirectoryPath;

        /// <summary>
        /// 타겟 파일 경로
        /// </summary>
        private string targerFilePath;

        /// <summary>
        /// 웨이브 입력 이벤트
        /// </summary>
        private WaveInEvent waveInEvent;

        /// <summary>
        /// 웨이브 파일 작성자
        /// </summary>
        private WaveFileWriter waveFileWriter = null;

        /// <summary>
        /// 종료 여부
        /// </summary>
        private bool closing = false;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.targetDirectoryPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "NAudio");

            if(!Directory.Exists(this.targetDirectoryPath))
            {
                Directory.CreateDirectory(this.targetDirectoryPath);
            }

            this.targerFilePath = Path.Combine(this.targetDirectoryPath, "result.wav");

            this.waveInEvent = new WaveInEvent();

            FormClosing                       += Form_FormClosing;
            this.recordButton.Click           += recordButton_Click;
            this.stopButton.Click             += stopButton_Click;
            this.waveInEvent.DataAvailable    += waveInEvent_DataAvailable;
            this.waveInEvent.RecordingStopped += waveInEvent_RecordingStopped;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 폼을 닫을 경우 처리하기 - Form_FormClosing(sender, e)

        /// <summary>
        /// 폼을 닫을 경우 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void Form_FormClosing(object sender, FormClosingEventArgs e)
        {
            this.closing = true;

            this.waveInEvent.StopRecording();
        }

        #endregion
        #region 레코딩 버튼 클릭시 처리하기 - recordButton_Click(sender, e)

        /// <summary>
        /// 레코딩 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void recordButton_Click(object sender, EventArgs e)
        {
            this.waveFileWriter = new WaveFileWriter(this.targerFilePath, this.waveInEvent.WaveFormat);

            this.waveInEvent.StartRecording();

            this.recordButton.Enabled = false;
            this.stopButton.Enabled   = true;
        }

        #endregion
        #region 중단 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

        /// <summary>
        /// 중단 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void stopButton_Click(object sender, EventArgs e)
        {
            this.waveInEvent.StopRecording();
        }

        #endregion
        #region 웨이브 입력 이벤트 데이터 이용 가능시 처리하기 - waveInEvent_DataAvailable(sender, e)

        /// <summary>
        /// 웨이브 입력 이벤트 데이터 이용 가능시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void waveInEvent_DataAvailable(object sender, WaveInEventArgs e)
        {
            this.waveFileWriter.Write(e.Buffer, 0, e.BytesRecorded);

            if(this.waveFileWriter.Position > this.waveInEvent.WaveFormat.AverageBytesPerSecond * 30)
            {
                this.waveInEvent.StopRecording();
            }
        }

        #endregion
        #region 웨이브 입력 이벤트 레코딩 중단시 처리하기 - waveInEvent_RecordingStopped(sender, e)

        /// <summary>
        /// 웨이브 입력 이벤트 레코딩 중단시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void waveInEvent_RecordingStopped(object sender, StoppedEventArgs e)
        {
            this.waveFileWriter?.Dispose();

            this.waveFileWriter = null;

            this.recordButton.Enabled = true;
            this.stopButton.Enabled   = false;

            if(this.closing)
            {
                this.waveInEvent.Dispose();
            }
        }

        #endregion
    }
}

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using System;

using System.IO;

using System.Windows.Forms;

using NAudio.Wave;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 타겟 디렉토리 경로

/// </summary>

private string targetDirectoryPath;

/// <summary>

/// 타겟 파일 경로

/// </summary>

private string targerFilePath;

/// <summary>

/// 웨이브 입력 이벤트

/// </summary>

private WaveInEvent waveInEvent;

/// <summary>

/// 웨이브 파일 작성자

/// </summary>

private WaveFileWriter waveFileWriter = null;

/// <summary>

/// 종료 여부

/// </summary>

private bool closing = false;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.targetDirectoryPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "NAudio");

if(!Directory.Exists(this.targetDirectoryPath))

{

Directory.CreateDirectory(this.targetDirectoryPath);

}

this.targerFilePath = Path.Combine(this.targetDirectoryPath, "result.wav");

this.waveInEvent = new WaveInEvent();

FormClosing += Form_FormClosing;

this.recordButton.Click += recordButton_Click;

this.stopButton.Click += stopButton_Click;

this.waveInEvent.DataAvailable += waveInEvent_DataAvailable;

this.waveInEvent.RecordingStopped += waveInEvent_RecordingStopped;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 폼을 닫을 경우 처리하기 - Form_FormClosing(sender, e)

/// <summary>

/// 폼을 닫을 경우 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void Form_FormClosing(object sender, FormClosingEventArgs e)

{

this.closing = true;

this.waveInEvent.StopRecording();

}

#endregion

#region 레코딩 버튼 클릭시 처리하기 - recordButton_Click(sender, e)

/// <summary>

/// 레코딩 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void recordButton_Click(object sender, EventArgs e)

{

this.waveFileWriter = new WaveFileWriter(this.targerFilePath, this.waveInEvent.WaveFormat);

this.waveInEvent.StartRecording();

this.recordButton.Enabled = false;

this.stopButton.Enabled = true;

}

#endregion

#region 중단 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

/// <summary>

/// 중단 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void stopButton_Click(object sender, EventArgs e)

{

this.waveInEvent.StopRecording();

}

#endregion

#region 웨이브 입력 이벤트 데이터 이용 가능시 처리하기 - waveInEvent_DataAvailable(sender, e)

/// <summary>

/// 웨이브 입력 이벤트 데이터 이용 가능시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void waveInEvent_DataAvailable(object sender, WaveInEventArgs e)

{

this.waveFileWriter.Write(e.Buffer, 0, e.BytesRecorded);

if(this.waveFileWriter.Position > this.waveInEvent.WaveFormat.AverageBytesPerSecond * 30)

{

this.waveInEvent.StopRecording();

}

#endregion

#region 웨이브 입력 이벤트 레코딩 중단시 처리하기 - waveInEvent_RecordingStopped(sender, e)

/// <summary>

/// 웨이브 입력 이벤트 레코딩 중단시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void waveInEvent_RecordingStopped(object sender, StoppedEventArgs e)

{

this.waveFileWriter?.Dispose();

this.waveFileWriter = null;

this.recordButton.Enabled = true;

this.stopButton.Enabled = false;

if(this.closing)

{

this.waveInEvent.Dispose();

}

#endregion

}

TestProject.zip

[C#/COMMON/NAUDIO/.NET5] ConcatenatingSampleProvider 클래스 : 오디오 파일 연결하기

■ ConcatenatingSampleProvider 클래스를 사용해 오디오 파일을 연결하는 방법을 보여준다. ▶ 예제 코드 (C#)


using NAudio.Wave;
using NAudio.Wave.SampleProviders;

string sourceAudioFilePath1 = @"d:\source1.mp3";
string sourceAudioFilePath2 = @"d:\source2.mp3";
string sourceAudioFilePath3 = @"d:\source3.mp3";
string targetAudioFilePath  = @"d:\target.wav";

AudioFileReader reader1 = new AudioFileReader(sourceAudioFilePath1);
AudioFileReader reader2 = new AudioFileReader(sourceAudioFilePath2);
AudioFileReader reader3 = new AudioFileReader(sourceAudioFilePath3);

ConcatenatingSampleProvider provider = new ConcatenatingSampleProvider(new[] { reader1, reader2, reader3 });

WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);

using NAudio.Wave;

using NAudio.Wave.SampleProviders;

string sourceAudioFilePath1 = @"d:\source1.mp3";

string sourceAudioFilePath2 = @"d:\source2.mp3";

string sourceAudioFilePath3 = @"d:\source3.mp3";

string targetAudioFilePath = @"d:\target.wav";

AudioFileReader reader1 = new AudioFileReader(sourceAudioFilePath1);

AudioFileReader reader2 = new AudioFileReader(sourceAudioFilePath2);

AudioFileReader reader3 = new AudioFileReader(sourceAudioFilePath3);

ConcatenatingSampleProvider provider = new ConcatenatingSampleProvider(new[] { reader1, reader2, reader3 });

WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);

[C#/COMMON/NAUDIO/.NET5] PanningSampleProvider 클래스 : 모노 파일을 스테레오 파일로 변환하기

■ PanningSampleProvider 클래스를 사용해 모노 파일을 스테레오 파일로 변환하는 방법을 보여준다. ▶ 예제 코드 (C#)


using NAudio.Wave;
using NAudio.Wave.SampleProviders;

string sourceAudioFilePath = @"d:\source.mp3"; // 모노
string targetAudioFilePath = @"d:\target.wav"; // 스테레오

using(var reader = new AudioFileReader(sourceAudioFilePath))
{
    PanningSampleProvider provider = new PanningSampleProvider(reader);

    provider.PanStrategy = new SquareRootPanStrategy();
    provider.Pan         = -0.5f;

    WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);
}

using NAudio.Wave;

using NAudio.Wave.SampleProviders;

string sourceAudioFilePath = @"d:\source.mp3"; // 모노

string targetAudioFilePath = @"d:\target.wav"; // 스테레오

using(var reader = new AudioFileReader(sourceAudioFilePath))

{

PanningSampleProvider provider = new PanningSampleProvider(reader);

provider.PanStrategy = new SquareRootPanStrategy();

provider.Pan = -0.5f;

WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);

}

※ PanningSampleProvider 클래스는 사용자 지정 가능한

[C#/COMMON/NAUDIO/.NET5] MonoToStereoSampleProvider 클래스 : 모노 파일을 스테레오 파일로 변환하기

■ MonoToStereoSampleProvider 클래스를 사용해 모노 파일을 스테레오 파일로 변환하는 방법을 보여준다. ▶ 예제 코드 (C#)


using NAudio.Wave;
using NAudio.Wave.SampleProviders;

string sourceAudioFilePath = @"d:\source.mp3"; // 모노
string targetAudioFilePath = @"d:\target.wav"; // 스테레오

using(AudioFileReader reader = new AudioFileReader(sourceAudioFilePath))
{
    MonoToStereoSampleProvider provider = new MonoToStereoSampleProvider(reader);

    provider.LeftVolume  = 0.0f;
    provider.RightVolume = 1.0f;

    WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);
}

using NAudio.Wave;

using NAudio.Wave.SampleProviders;

string sourceAudioFilePath = @"d:\source.mp3"; // 모노

string targetAudioFilePath = @"d:\target.wav"; // 스테레오

using(AudioFileReader reader = new AudioFileReader(sourceAudioFilePath))

{

MonoToStereoSampleProvider provider = new MonoToStereoSampleProvider(reader);

provider.LeftVolume = 0.0f;

provider.RightVolume = 1.0f;

WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);

}

※ MonoToStereoProvider16 클래스는 16비트 PCM 스테레오

[C#/COMMON/NAUDIO/.NET5] StereoToMonoSampleProvider 클래스 : 스테레오 파일을 모노 파일로 변환하기

■ StereoToMonoSampleProvider 클래스를 사용해 스테레오 파일을 모노 파일로 변환하는 방법을 보여준다. ▶ 예제 코드 (C#)


using NAudio.Wave;
using NAudio.Wave.SampleProviders;

string sourceAudioFilePath = @"d:\source.mp3"; // 스테레오
string targetAudioFilePath = @"d:\target.wav"; // 모노

using(AudioFileReader reader = new AudioFileReader(sourceAudioFilePath))
{
    StereoToMonoSampleProvider provider = new StereoToMonoSampleProvider(reader);

    provider.LeftVolume  = 0.0f;
    provider.RightVolume = 1.0f;

    WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);
}

using NAudio.Wave;

using NAudio.Wave.SampleProviders;

string sourceAudioFilePath = @"d:\source.mp3"; // 스테레오

string targetAudioFilePath = @"d:\target.wav"; // 모노

using(AudioFileReader reader = new AudioFileReader(sourceAudioFilePath))

{

StereoToMonoSampleProvider provider = new StereoToMonoSampleProvider(reader);

provider.LeftVolume = 0.0f;

provider.RightVolume = 1.0f;

WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);

}

※ StereoToMonoProvider16 클래스는 16비트 PCM 스테레오

[C#/COMMON/NAUDIO/.NET5] MixingSampleProvider 클래스 : 2개의 WAV 파일을 1개의 WAV 파일로 변환하기

■ MixingSampleProvider 클래스를 사용해 2개의 WAV 파일을 1개의 WAV 파일로 변환하는 방법을 보여준다. ▶ 예제 코드 (C#)


using System;

using NAudio.Wave;
using NAudio.Wave.SampleProviders;

string sourceAudioFilePath1 = @"d:\source1.wav";
string sourceAudioFilePath2 = @"d:\source2.wav";
string targetAudioFilePath  = @"d:\target.wav";

using(AudioFileReader reader1 = new AudioFileReader(sourceAudioFilePath1))
{
    using(AudioFileReader reader2 = new AudioFileReader(sourceAudioFilePath2))
    {
        reader1.Volume = 0.75f;
        reader2.Volume = 0.75f;

        MixingSampleProvider provider = new MixingSampleProvider
        (
            new[]
            {
                reader1.Take(TimeSpan.FromSeconds(5)),
                reader2.Skip(TimeSpan.FromSeconds(3)).Take(TimeSpan.FromSeconds(5))
            }
        );

        WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);
    }
}

using System;

using NAudio.Wave;

using NAudio.Wave.SampleProviders;

string sourceAudioFilePath1 = @"d:\source1.wav";

string sourceAudioFilePath2 = @"d:\source2.wav";

string targetAudioFilePath = @"d:\target.wav";

using(AudioFileReader reader1 = new AudioFileReader(sourceAudioFilePath1))

{

using(AudioFileReader reader2 = new AudioFileReader(sourceAudioFilePath2))

{

reader1.Volume = 0.75f;

reader2.Volume = 0.75f;

MixingSampleProvider provider = new MixingSampleProvider

(

new[]

{

reader1.Take(TimeSpan.FromSeconds(5)),

reader2.Skip(TimeSpan.FromSeconds(3)).Take(TimeSpan.FromSeconds(5))

}

);

WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);

}

[C#/COMMON/NAUDIO/.NET5] MixingSampleProvider 클래스 : 2개의 WAV 파일을 1개의 WAV 파일로 변환하기

■ MixingSampleProvider 클래스를 사용해 2개의 WAV 파일을 1개의 WAV 파일로 변환하는 방법을 보여준다. ▶ 예제 코드 (C#)


using NAudio.Wave;
using NAudio.Wave.SampleProviders;

string sourceAudioFilePath1 = @"d:\source1.wav";
string sourceAudioFilePath2 = @"d:\source2.wav";
string targetAudioFilePath  = @"d:\target.wav";

using(AudioFileReader reader1 = new AudioFileReader(sourceAudioFilePath1))
{
    using(AudioFileReader reader2 = new AudioFileReader(sourceAudioFilePath2))
    {
        reader1.Volume = 0.75f;
        reader2.Volume = 0.75f;

        MixingSampleProvider provider = new MixingSampleProvider(new[] { reader1, reader2 });

        WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);
    }
}

using NAudio.Wave;

using NAudio.Wave.SampleProviders;

string sourceAudioFilePath1 = @"d:\source1.wav";

string sourceAudioFilePath2 = @"d:\source2.wav";

string targetAudioFilePath = @"d:\target.wav";

using(AudioFileReader reader1 = new AudioFileReader(sourceAudioFilePath1))

{

using(AudioFileReader reader2 = new AudioFileReader(sourceAudioFilePath2))

{

reader1.Volume = 0.75f;

reader2.Volume = 0.75f;

MixingSampleProvider provider = new MixingSampleProvider(new[] { reader1, reader2 });

WaveFileWriter.CreateWaveFile16(targetAudioFilePath, provider);

}

[C#/COMMON/NAUDIO/.NET5] SignalGenerator 클래스 : WAV 파일 생성하기

■ SignalGenerator 클래스를 사용해 WAV 파일을 생성하는 방법을 보여준다. ▶ 예제 코드 (C#)


using System;
using System.IO;

using NAudio.Wave;
using NAudio.Wave.SampleProviders;

string targetDirectoryPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "NAudio");

Directory.CreateDirectory(targetDirectoryPath);

string targetFilePath = Path.Combine(targetDirectoryPath, "test.wav");

SignalGenerator signalGenerator = new SignalGenerator(44100, 2)
{
    Type            = SignalGeneratorType.Sweep,
    Frequency       = 500,
    FrequencyEnd    = 3000,
    Gain            = 0.2f,
    SweepLengthSecs = 20
};

WaveFileWriter.CreateWaveFile16(targetFilePath, signalGenerator.Take(TimeSpan.FromSeconds(20)));

using System;

using System.IO;

using NAudio.Wave;

using NAudio.Wave.SampleProviders;

string targetDirectoryPath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "NAudio");

Directory.CreateDirectory(targetDirectoryPath);

string targetFilePath = Path.Combine(targetDirectoryPath, "test.wav");

SignalGenerator signalGenerator = new SignalGenerator(44100, 2)

{

Type = SignalGeneratorType.Sweep,

Frequency = 500,

FrequencyEnd = 3000,

Gain = 0.2f,

SweepLengthSecs = 20

};

WaveFileWriter.CreateWaveFile16(targetFilePath, signalGenerator.Take(TimeSpan.FromSeconds(20)));

[C#/COMMON/NAUDIO/.NET5] WaveFileWriter 클래스 : CreateWaveFile 정적 메소드를 사용해 MP3 파일을 WAV 파일로 변환하기 (MediaFoundationReader 객체 사용)

■ WaveFileWriter 클래스의 CreateWaveFile 정적 메소드를 사용해 MP3 파일을 WAV 파일로 변환하는 방법을 보여준다. (MediaFoundationReader 객체 사용) ▶ 예제 코드 (C#)


using NAudio.Wave;

string sourceAudioFilePath = @"d:\sample.mp3";
string targetAudioFilePath = @"d:\sample.wav";

using(MediaFoundationReader reader = new MediaFoundationReader(sourceAudioFilePath))
{
    WaveFileWriter.CreateWaveFile(targetAudioFilePath, reader);
}

using NAudio.Wave;

string sourceAudioFilePath = @"d:\sample.mp3";

string targetAudioFilePath = @"d:\sample.wav";

using(MediaFoundationReader reader = new MediaFoundationReader(sourceAudioFilePath))

{

WaveFileWriter.CreateWaveFile(targetAudioFilePath, reader);

}

[C#/COMMON/NAUDIO/.NET5] WaveFileWriter 클래스 : CreateWaveFile 정적 메소드를 사용해 MP3 파일을 WAV 파일로 변환하기 (Mp3FileReader 객체 사용)

■ WaveFileWriter 클래스의 CreateWaveFile 정적 메소드를 사용해 MP3 파일을 WAV 파일로 변환하는 방법을 보여준다. (Mp3FileReader 객체 사용) ▶ 예제 코드 (C#)


using NAudio.Wave;

string sourceAudioFilePath = @"d:\sample.mp3";
string targetAudioFilePath = @"d:\sample.wav";

using(Mp3FileReader reader = new Mp3FileReader(sourceAudioFilePath))
{
    WaveFileWriter.CreateWaveFile(targetAudioFilePath, reader);
}

using NAudio.Wave;

string sourceAudioFilePath = @"d:\sample.mp3";

string targetAudioFilePath = @"d:\sample.wav";

using(Mp3FileReader reader = new Mp3FileReader(sourceAudioFilePath))

{

WaveFileWriter.CreateWaveFile(targetAudioFilePath, reader);

}

[C#/WINFORM] 사운드 필터링 사용하기

■ 사운드 필터링을 사용하는 방법을 보여준다. ▶ FFT.cs


using System;

namespace TestProject
{
    /// <summary>
    /// 고속 푸리엔 변환
    /// </summary>
    public class FFT
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Protected

        #region Field

        /// <summary>
        /// 사인 배정도 실수 배열
        /// </summary>
        /// <remarks>sin(pi / 2), sin(pi / 4), sin(pi / 8) ...</remarks>
        protected static double[] _sineDoubleArray = null;

        /// <summary>
        /// 사인 단정도 실수 배열
        /// </summary>
        protected static float[] _sineFloatArray = null;

        /// <summary>
        /// 코사인 배정도 실수 배열
        /// </summary>
        /// <remarks>cos(pi / 2), cos(pi / 4), cos(pi / 8) ...</remarks>
        protected static double[] _cosineDoubleArray = null;

        /// <summary>
        /// 코사인 단정도 실수 배열
        /// </summary>
        protected static float[] _cosineFloatArray = null;

        /// <summary>
        /// 테이블 잠금 객체
        /// </summary>
        protected static object _tableLock = new object();

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Public

        // 배정도 실수
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        public static void ComputeForwardFFT(double[] sourceRealArray)
        {
            ComputeFFT(sourceRealArray, true);
        }

        #endregion
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, targetRealArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        public static void ComputeForwardFFT(double[] sourceRealArray, double[] targetRealArray)
        {
            ComputeFFT(sourceRealArray, targetRealArray, true);
        }

        #endregion
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, targetRealArray, targetImaginaryArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        public static void ComputeForwardFFT(double[] sourceRealArray, double[] targetRealArray, double[] targetImaginaryArray)
        {
            ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, true);
        }

        #endregion
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, sourceImaginaryArray, targetRealArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        public static void ComputeForwardFFT(float[] sourceRealArray, float[] sourceImaginaryArray, float[] targetRealArray)
        {
            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, true);
        }

        #endregion
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        public static void ComputeForwardFFT
        (
            double[] sourceRealArray,
            double[] sourceImaginaryArray,
            double[] targetRealArray,
            double[] targetImaginaryArray
        )
        {
            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, true);
        }

        #endregion

        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        public static void ComputeInverseFFT(double[] sourceRealArray)
        {
            ComputeFFT(sourceRealArray, false);
        }

        #endregion
        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        public static void ComputeInverseFFT(double[] sourceRealArray, double[] targetRealArray)
        {
            ComputeFFT(sourceRealArray, targetRealArray, false);
        }

        #endregion
        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray, targetImaginaryArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        public static void ComputeInverseFFT(double[] sourceRealArray, double[] targetRealArray, double[] targetImaginaryArray)
        {
            ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, true);
        }

        #endregion
        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        public static void ComputeInverseFFT
        (
            double[] sourceRealArray,
            double[] sourceImaginaryArray,
            double[] targetRealArray,
            double[] targetImaginaryArray
        )
        {
            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, false);
        }

        #endregion

        // 단정도 실수
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        public static void ComputeForwardFFT(float[] sourceRealArray)
        {
            ComputeFFT(sourceRealArray, true);
        }

        #endregion
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, targetRealArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        public static void ComputeForwardFFT(float[] sourceRealArray, float[] targetRealArray)
        {
            ComputeFFT(sourceRealArray, targetRealArray, true);
        }

        #endregion
        #region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

        /// <summary>
        /// 순방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        public static void ComputeForwardFFT
        (
            float[] sourceRealArray,
            float[] sourceImaginaryArray,
            float[] targetRealArray,
            float[] targetImaginaryArray
        )
        {
            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, true);
        }

        #endregion

        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        public static void ComputeInverseFFT(float[] sourceRealArray)
        {
            ComputeFFT(sourceRealArray, false);
        }

        #endregion
        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        public static void ComputeInverseFFT(float[] sourceRealArray, float[] targetRealArray)
        {
            ComputeFFT(sourceRealArray, targetRealArray, false);
        }

        #endregion
        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray, targetImaginaryArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        public static void ComputeInverseFFT(float[] sourceRealArray, float[] targetRealArray, float[] targetImaginaryArray)
        {
            ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, true);
        }

        #endregion
        #region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

        /// <summary>
        /// 역방향 FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        public static void ComputeInverseFFT
        (
            float[] sourceRealArray,
            float[] sourceImaginaryArray,
            float[] targetRealArray,
            float[] targetImaginaryArray
        )
        {
            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, false);
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Protected

        #region 배열 값 설정하기 - SetArrayValue()

        /// <summary>
        /// 배열 값 설정하기
        /// </summary>
        protected static void SetArrayValue()
        {

            if(_sineDoubleArray != null)
            {
                return;
            }

            lock(_tableLock)
            {
                if(_sineDoubleArray != null)
                {
                    return;
                }

                int size = 20;

                double[] sineDoubleArray   = new double[size];
                float[]  sineFloatArray    = new float[size];
                double[] cosineDoubleArray = new double[size];
                float[]  cosineFloatArray  = new float[size];

                double pi = Math.PI;

                for(int i = 0; i < size; i++)
                {
                    sineDoubleArray[i]   = Math.Sin(pi);
                    sineFloatArray[i]    = (float)(sineDoubleArray[i]);
                    cosineDoubleArray[i] = Math.Cos(pi);
                    cosineFloatArray[i]  = (float)(cosineDoubleArray[i]);

                    pi /= 2;
                }

                _sineFloatArray    = sineFloatArray;
                _sineDoubleArray   = sineDoubleArray;
                _cosineFloatArray  = cosineFloatArray;
                _cosineDoubleArray = cosineDoubleArray;
            }
        }

        #endregion
        #region 비트 반전하기 - ReverseBit(value, bitCount)

        /// <summary>
        /// 비트 반전하기
        /// </summary>
        /// <param name="value">값</param>
        /// <param name="bitCount">비트 수</param>
        /// <returns>반전 값</returns>
        protected static int ReverseBit(int value, int bitCount)
        {
            int result = 0;

            for(int b = 0; b < bitCount; ++b)
            {
                result <<= 1;

                result |= value & 1;

                value >>= 1;
            }

            return result;
        }

        #endregion

        // 배정도 실수
        #region FFT 수행하기 - PerformFFT(sourceRealArray, sourceImaginaryArray, forward)

        /// <summary>
        /// FFT 수행하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void PerformFFT(double[] sourceRealArray, double[] sourceImaginaryArray, bool forward)
        {
            int    length = sourceRealArray.Length;
            double sign   = forward ? 1 : -1;
            int    index  = 0;

            for(int p = 1; p < length; p <<= 1)
            {
                int p2 = p << 1;

                double sine   = sign * _sineDoubleArray[index];
                double cosine = _cosineDoubleArray[index++];

                double wr = 1.0;
                double wi = 0.0;

                int j;

                for(j = 0; j < p; ++j)
                {
                    int k;

                    for(k = j; k < length; k += p2)
                    {
                        int k2 = k + p;

                        double tr = (wr * sourceRealArray[k2]) - (wi * sourceImaginaryArray[k2]);
                        double ti = (wr * sourceImaginaryArray[k2]) + (wi * sourceRealArray[k2]);

                        sourceRealArray[k2] = sourceRealArray[k] - tr;

                        sourceImaginaryArray[k2] = sourceImaginaryArray[k] - ti;

                        sourceRealArray[k] += tr;

                        sourceImaginaryArray[k] += ti;
                    }

                    double nwr = (wr * cosine) - (wi * sine);
                    double nwi = (wi * cosine) + (wr * sine);

                    wr = nwr;
                    wi = nwi;
                }
            }
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT
        (
            double[] sourceRealArray,
            double[] sourceImaginaryArray,
            double[] targetRealArray,
            double[] targetImaginaryArray,
            bool forward
        )
        {
            SetArrayValue();

            int length = sourceRealArray.Length;

            int i;

            int bitCount = 0;

            for(i = 1; i < length; i <<= 1)
            {
                bitCount++;
            }

            for(i = 0; i < length; i++)
            {
                int p = ReverseBit(i, bitCount);

                targetRealArray[p] = sourceRealArray[i];

                targetImaginaryArray[p] = sourceImaginaryArray[i];
            }

            PerformFFT(targetRealArray, targetImaginaryArray, forward);
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT(double[] sourceRealArray, bool forward)
        {
            double[] targetRealArray      = new double[sourceRealArray.Length];
            double[] sourceImaginaryArray = new double[sourceRealArray.Length];
            double[] targetImaginaryArray = new double[sourceRealArray.Length];

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                sourceImaginaryArray[i] = 0;
            }

            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                targetRealArray[i] = System.Math.Sqrt
                (
                    (targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])
                );
            }
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, targetRealArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT(double[] sourceRealArray, double[] targetRealArray, bool forward)
        {
            double[] sourceImaginaryArray = new double[sourceRealArray.Length];
            double[] targetImaginaryArray = new double[sourceRealArray.Length];

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                sourceImaginaryArray[i] = 0;
            }

            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                targetRealArray[i] = Math.Sqrt
                (
                    (targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])
                );
            }
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT(double[] sourceRealArray, double[] targetRealArray, double[] targetImaginaryArray, bool forward)
        {
            double[] sourceImaginaryArray = new double[sourceRealArray.Length];

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                sourceImaginaryArray[i] = 0;
            }

            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);
        }

        #endregion

        // 단정도 실수
        #region FFT 수행하기 - PerformFFT(sourceRealArray, sourceImaginaryArray, forward)

        /// <summary>
        /// FFT 수행하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void PerformFFT(float[] sourceRealArray, float[] sourceImaginaryArray, bool forward)
        {
            int   length = sourceRealArray.Length;
            float sign   = forward ? 1 : -1;
            int   index  = 0;

            for(int p = 1; p < length; p <<= 1)
            {
                int p2 = p << 1;

                float sine   = sign * _sineFloatArray[index];
                float cosine = _cosineFloatArray[index++];

                float wr = 1.0f;
                float wi = 0.0f;

                int j;

                for(j = 0; j < p; j++)
                {
                    int k;

                    for(k = j; k < length; k += p2)
                    {
                        int k2 = k + p;

                        float tr = (wr * sourceRealArray[k2]) - (wi * sourceImaginaryArray[k2]);
                        float ti = (wr * sourceImaginaryArray[k2]) + (wi * sourceRealArray[k2]);

                        sourceRealArray[k2] = sourceRealArray[k] - tr;

                        sourceImaginaryArray[k2] = sourceImaginaryArray[k] - ti;

                        sourceRealArray[k] += tr;

                        sourceImaginaryArray[k] += ti;
                    }

                    float nwr = (wr * cosine) - (wi * sine);
                    float nwi = (wi * cosine) + (wr * sine);

                    wr = nwr;
                    wi = nwi;
                }
            }
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소수 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="targetImaginaryArray">타겟 허수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT
        (
            float[] sourceRealArray,
            float[] sourceImaginaryArray,
            float[] targetRealArray,
            float[] targetImaginaryArray,
            bool forward
        )
        {
            SetArrayValue();

            int length = sourceRealArray.Length;

            int i;

            int bitCount = 0;

            for(i = 1; i < length; i <<= 1)
            {
                bitCount++;
            }

            length = 1 << (bitCount-1);

            for(i = 0; i < length; i++)
            {
                int p = ReverseBit(i, bitCount);

                targetRealArray[p] = sourceRealArray[i];

                targetImaginaryArray[p] = sourceImaginaryArray[i];
            }

            PerformFFT(targetRealArray, targetImaginaryArray, forward);
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT(float[] sourceRealArray, bool forward)
        {
            float[] sourceImaginaryArray = new float[sourceRealArray.Length];
            float[] targetRealArray      = new float[sourceRealArray.Length];
            float[] targetImaginaryArray = new float[sourceRealArray.Length];

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                sourceImaginaryArray[i] = 0;
            }

            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                targetRealArray[i] = (float)Math.Sqrt
                (
                    (targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])
                );
            }
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, targetRealArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT(float[] sourceRealArray, float[] targetRealArray, bool forward)
        {
            float[] sourceImaginaryArray = new float[sourceRealArray.Length];
            float[] targetImaginaryArray = new float[sourceRealArray.Length];
            float[] temporaryRealArray   = new float[sourceRealArray.Length];

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                sourceImaginaryArray[i] = 0;
            }

            ComputeFFT(sourceRealArray, sourceImaginaryArray, temporaryRealArray, targetImaginaryArray, forward);

            for(int i = 0; i < targetRealArray.Length; i++)
            {
                targetRealArray[i] = (float)Math.Sqrt
                (
                    (temporaryRealArray[i] * temporaryRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])
                );
            }
        }

        #endregion
        #region FFT 계산하기 - ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, forward)

        /// <summary>
        /// FFT 계산하기
        /// </summary>
        /// <param name="sourceRealArray">소스 실수 배열</param>
        /// <param name="sourceImaginaryArray">소스 허수 배열</param>
        /// <param name="targetRealArray">타겟 실수 배열</param>
        /// <param name="forward">순방향 여부</param>
        protected static void ComputeFFT(float[] sourceRealArray, float[] sourceImaginaryArray, float[] targetRealArray, bool forward)
        {
            float[] targetImaginaryArray = new float[sourceRealArray.Length];

            ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

            for(int i = 0; i < sourceRealArray.Length; i++)
            {
                targetRealArray[i] = (float)Math.Sqrt
                (
                    (targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])
                );
            }
        }

        #endregion
    }
}

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using System;

namespace TestProject

{

/// <summary>

/// 고속 푸리엔 변환

/// </summary>

public class FFT

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Protected

#region Field

/// <summary>

/// 사인 배정도 실수 배열

/// </summary>

/// <remarks>sin(pi / 2), sin(pi / 4), sin(pi / 8) ...</remarks>

protected static double[] _sineDoubleArray = null;

/// <summary>

/// 사인 단정도 실수 배열

/// </summary>

protected static float[] _sineFloatArray = null;

/// <summary>

/// 코사인 배정도 실수 배열

/// </summary>

/// <remarks>cos(pi / 2), cos(pi / 4), cos(pi / 8) ...</remarks>

protected static double[] _cosineDoubleArray = null;

/// <summary>

/// 코사인 단정도 실수 배열

/// </summary>

protected static float[] _cosineFloatArray = null;

/// <summary>

/// 테이블 잠금 객체

/// </summary>

protected static object _tableLock = new object();

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Public

// 배정도 실수

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

public static void ComputeForwardFFT(double[] sourceRealArray)

{

ComputeFFT(sourceRealArray, true);

}

#endregion

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, targetRealArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

public static void ComputeForwardFFT(double[] sourceRealArray, double[] targetRealArray)

{

ComputeFFT(sourceRealArray, targetRealArray, true);

}

#endregion

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, targetRealArray, targetImaginaryArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

public static void ComputeForwardFFT(double[] sourceRealArray, double[] targetRealArray, double[] targetImaginaryArray)

{

ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, true);

}

#endregion

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, sourceImaginaryArray, targetRealArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

public static void ComputeForwardFFT(float[] sourceRealArray, float[] sourceImaginaryArray, float[] targetRealArray)

{

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, true);

}

#endregion

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

public static void ComputeForwardFFT

(

double[] sourceRealArray,

double[] sourceImaginaryArray,

double[] targetRealArray,

double[] targetImaginaryArray

)

{

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, true);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

public static void ComputeInverseFFT(double[] sourceRealArray)

{

ComputeFFT(sourceRealArray, false);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

public static void ComputeInverseFFT(double[] sourceRealArray, double[] targetRealArray)

{

ComputeFFT(sourceRealArray, targetRealArray, false);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray, targetImaginaryArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

public static void ComputeInverseFFT(double[] sourceRealArray, double[] targetRealArray, double[] targetImaginaryArray)

{

ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, true);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

public static void ComputeInverseFFT

(

double[] sourceRealArray,

double[] sourceImaginaryArray,

double[] targetRealArray,

double[] targetImaginaryArray

)

{

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, false);

}

#endregion

// 단정도 실수

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

public static void ComputeForwardFFT(float[] sourceRealArray)

{

ComputeFFT(sourceRealArray, true);

}

#endregion

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, targetRealArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

public static void ComputeForwardFFT(float[] sourceRealArray, float[] targetRealArray)

{

ComputeFFT(sourceRealArray, targetRealArray, true);

}

#endregion

#region 순방향 FFT 계산하기 - ComputeForwardFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

/// <summary>

/// 순방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

public static void ComputeForwardFFT

(

float[] sourceRealArray,

float[] sourceImaginaryArray,

float[] targetRealArray,

float[] targetImaginaryArray

)

{

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, true);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

public static void ComputeInverseFFT(float[] sourceRealArray)

{

ComputeFFT(sourceRealArray, false);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

public static void ComputeInverseFFT(float[] sourceRealArray, float[] targetRealArray)

{

ComputeFFT(sourceRealArray, targetRealArray, false);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, targetRealArray, targetImaginaryArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

public static void ComputeInverseFFT(float[] sourceRealArray, float[] targetRealArray, float[] targetImaginaryArray)

{

ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, true);

}

#endregion

#region 역방향 FFT 계산하기 - ComputeInverseFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray)

/// <summary>

/// 역방향 FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

public static void ComputeInverseFFT

(

float[] sourceRealArray,

float[] sourceImaginaryArray,

float[] targetRealArray,

float[] targetImaginaryArray

)

{

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, false);

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Protected

#region 배열 값 설정하기 - SetArrayValue()

/// <summary>

/// 배열 값 설정하기

/// </summary>

protected static void SetArrayValue()

{

if(_sineDoubleArray != null)

{

return;

}

lock(_tableLock)

{

if(_sineDoubleArray != null)

{

return;

}

int size = 20;

double[] sineDoubleArray = new double[size];

float[] sineFloatArray = new float[size];

double[] cosineDoubleArray = new double[size];

float[] cosineFloatArray = new float[size];

double pi = Math.PI;

for(int i = 0; i < size; i++)

{

sineDoubleArray[i] = Math.Sin(pi);

sineFloatArray[i] = (float)(sineDoubleArray[i]);

cosineDoubleArray[i] = Math.Cos(pi);

cosineFloatArray[i] = (float)(cosineDoubleArray[i]);

pi /= 2;

}

_sineFloatArray = sineFloatArray;

_sineDoubleArray = sineDoubleArray;

_cosineFloatArray = cosineFloatArray;

_cosineDoubleArray = cosineDoubleArray;

}

#endregion

#region 비트 반전하기 - ReverseBit(value, bitCount)

/// <summary>

/// 비트 반전하기

/// </summary>

/// <param name="value">값</param>

/// <param name="bitCount">비트 수</param>

/// <returns>반전 값</returns>

protected static int ReverseBit(int value, int bitCount)

{

int result = 0;

for(int b = 0; b < bitCount; ++b)

{

result <<= 1;

result |= value & 1;

value >>= 1;

}

return result;

}

#endregion

// 배정도 실수

#region FFT 수행하기 - PerformFFT(sourceRealArray, sourceImaginaryArray, forward)

/// <summary>

/// FFT 수행하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void PerformFFT(double[] sourceRealArray, double[] sourceImaginaryArray, bool forward)

{

int length = sourceRealArray.Length;

double sign = forward ? 1 : -1;

int index = 0;

for(int p = 1; p < length; p <<= 1)

{

int p2 = p << 1;

double sine = sign * _sineDoubleArray[index];

double cosine = _cosineDoubleArray[index++];

double wr = 1.0;

double wi = 0.0;

int j;

for(j = 0; j < p; ++j)

{

int k;

for(k = j; k < length; k += p2)

{

int k2 = k + p;

double tr = (wr * sourceRealArray[k2]) - (wi * sourceImaginaryArray[k2]);

double ti = (wr * sourceImaginaryArray[k2]) + (wi * sourceRealArray[k2]);

sourceRealArray[k2] = sourceRealArray[k] - tr;

sourceImaginaryArray[k2] = sourceImaginaryArray[k] - ti;

sourceRealArray[k] += tr;

sourceImaginaryArray[k] += ti;

}

double nwr = (wr * cosine) - (wi * sine);

double nwi = (wi * cosine) + (wr * sine);

wr = nwr;

wi = nwi;

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT

(

double[] sourceRealArray,

double[] sourceImaginaryArray,

double[] targetRealArray,

double[] targetImaginaryArray,

bool forward

)

{

SetArrayValue();

int length = sourceRealArray.Length;

int i;

int bitCount = 0;

for(i = 1; i < length; i <<= 1)

{

bitCount++;

}

for(i = 0; i < length; i++)

{

int p = ReverseBit(i, bitCount);

targetRealArray[p] = sourceRealArray[i];

targetImaginaryArray[p] = sourceImaginaryArray[i];

}

PerformFFT(targetRealArray, targetImaginaryArray, forward);

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT(double[] sourceRealArray, bool forward)

{

double[] targetRealArray = new double[sourceRealArray.Length];

double[] sourceImaginaryArray = new double[sourceRealArray.Length];

double[] targetImaginaryArray = new double[sourceRealArray.Length];

for(int i = 0; i < sourceRealArray.Length; i++)

{

sourceImaginaryArray[i] = 0;

}

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

for(int i = 0; i < sourceRealArray.Length; i++)

{

targetRealArray[i] = System.Math.Sqrt

(

(targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])

);

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, targetRealArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT(double[] sourceRealArray, double[] targetRealArray, bool forward)

{

double[] sourceImaginaryArray = new double[sourceRealArray.Length];

double[] targetImaginaryArray = new double[sourceRealArray.Length];

for(int i = 0; i < sourceRealArray.Length; i++)

{

sourceImaginaryArray[i] = 0;

}

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

for(int i = 0; i < sourceRealArray.Length; i++)

{

targetRealArray[i] = Math.Sqrt

(

(targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])

);

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, targetRealArray, targetImaginaryArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT(double[] sourceRealArray, double[] targetRealArray, double[] targetImaginaryArray, bool forward)

{

double[] sourceImaginaryArray = new double[sourceRealArray.Length];

for(int i = 0; i < sourceRealArray.Length; i++)

{

sourceImaginaryArray[i] = 0;

}

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

}

#endregion

// 단정도 실수

#region FFT 수행하기 - PerformFFT(sourceRealArray, sourceImaginaryArray, forward)

/// <summary>

/// FFT 수행하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void PerformFFT(float[] sourceRealArray, float[] sourceImaginaryArray, bool forward)

{

int length = sourceRealArray.Length;

float sign = forward ? 1 : -1;

int index = 0;

for(int p = 1; p < length; p <<= 1)

{

int p2 = p << 1;

float sine = sign * _sineFloatArray[index];

float cosine = _cosineFloatArray[index++];

float wr = 1.0f;

float wi = 0.0f;

int j;

for(j = 0; j < p; j++)

{

int k;

for(k = j; k < length; k += p2)

{

int k2 = k + p;

float tr = (wr * sourceRealArray[k2]) - (wi * sourceImaginaryArray[k2]);

float ti = (wr * sourceImaginaryArray[k2]) + (wi * sourceRealArray[k2]);

sourceRealArray[k2] = sourceRealArray[k] - tr;

sourceImaginaryArray[k2] = sourceImaginaryArray[k] - ti;

sourceRealArray[k] += tr;

sourceImaginaryArray[k] += ti;

}

float nwr = (wr * cosine) - (wi * sine);

float nwi = (wi * cosine) + (wr * sine);

wr = nwr;

wi = nwi;

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소수 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="targetImaginaryArray">타겟 허수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT

(

float[] sourceRealArray,

float[] sourceImaginaryArray,

float[] targetRealArray,

float[] targetImaginaryArray,

bool forward

)

{

SetArrayValue();

int length = sourceRealArray.Length;

int i;

int bitCount = 0;

for(i = 1; i < length; i <<= 1)

{

bitCount++;

}

length = 1 << (bitCount-1);

for(i = 0; i < length; i++)

{

int p = ReverseBit(i, bitCount);

targetRealArray[p] = sourceRealArray[i];

targetImaginaryArray[p] = sourceImaginaryArray[i];

}

PerformFFT(targetRealArray, targetImaginaryArray, forward);

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT(float[] sourceRealArray, bool forward)

{

float[] sourceImaginaryArray = new float[sourceRealArray.Length];

float[] targetRealArray = new float[sourceRealArray.Length];

float[] targetImaginaryArray = new float[sourceRealArray.Length];

for(int i = 0; i < sourceRealArray.Length; i++)

{

sourceImaginaryArray[i] = 0;

}

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

for(int i = 0; i < sourceRealArray.Length; i++)

{

targetRealArray[i] = (float)Math.Sqrt

(

(targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])

);

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, targetRealArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT(float[] sourceRealArray, float[] targetRealArray, bool forward)

{

float[] sourceImaginaryArray = new float[sourceRealArray.Length];

float[] targetImaginaryArray = new float[sourceRealArray.Length];

float[] temporaryRealArray = new float[sourceRealArray.Length];

for(int i = 0; i < sourceRealArray.Length; i++)

{

sourceImaginaryArray[i] = 0;

}

ComputeFFT(sourceRealArray, sourceImaginaryArray, temporaryRealArray, targetImaginaryArray, forward);

for(int i = 0; i < targetRealArray.Length; i++)

{

targetRealArray[i] = (float)Math.Sqrt

(

(temporaryRealArray[i] * temporaryRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])

);

}

#endregion

#region FFT 계산하기 - ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, forward)

/// <summary>

/// FFT 계산하기

/// </summary>

/// <param name="sourceRealArray">소스 실수 배열</param>

/// <param name="sourceImaginaryArray">소스 허수 배열</param>

/// <param name="targetRealArray">타겟 실수 배열</param>

/// <param name="forward">순방향 여부</param>

protected static void ComputeFFT(float[] sourceRealArray, float[] sourceImaginaryArray, float[] targetRealArray, bool forward)

{

float[] targetImaginaryArray = new float[sourceRealArray.Length];

ComputeFFT(sourceRealArray, sourceImaginaryArray, targetRealArray, targetImaginaryArray, forward);

for(int i = 0; i < sourceRealArray.Length; i++)

{

targetRealArray[i] = (float)Math.Sqrt

(

(targetRealArray[i] * targetRealArray[i]) + (targetImaginaryArray[i] * targetImaginaryArray[i])

);

}

#endregion

}

▶ Line.cs


using System.Drawing;

namespace TestProject
{
    /// <summary>
    /// 선
    /// </summary>
    public class Line
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 명칭
        /// </summary>
        public string Name = string.Empty;

        /// <summary>
        /// 표시 여부
        /// </summary>
        public bool Visible = true;

        /// <summary>
        /// X 배열
        /// </summary>
        /// <remarks>NULL인 경우 Y 인덱스를 사용한다.</remarks>
        public double[] XArray = null;

        /// <summary>
        /// Y 배열
        /// </summary>
        public double[] YArray = null;

        /// <summary>
        /// 선 색상
        /// </summary>
        public Color LineColor = Color.Black;

        /// <summary>
        /// 선 너비
        /// </summary>
        public float LineWidth = 1f;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 최소 X - MinimumX

        /// <summary>
        /// 최소 X
        /// </summary>
        public double MinimumX
        {
            get
            {
                double [] xArray = XArray;

                if(xArray == null)
                {
                    return 0;
                }

                if(xArray.Length < 1)
                {
                    return 0;
                }

                double minimumX = xArray[0];

                for(int i = 0; i < xArray.Length; i++)
                {
                    minimumX = minimumX < xArray[i] ? minimumX : xArray[i];
                }

                return minimumX;
            }
        }

        #endregion
        #region 최대 X - MaximumX

        /// <summary>
        /// 최대 X
        /// </summary>
        public double MaximumX
        {
            get
            {
                double[] xArray = XArray;

                if(xArray == null)
                {
                    double[] yArray = YArray;

                    if(yArray == null)
                    {
                        return 0;
                    }

                    return yArray.Length;
                }

                if(xArray.Length < 1)
                {
                    return 0;
                }

                double maximumX = xArray[0];

                for(int i = 0; i < xArray.Length; i++)
                {
                    maximumX = maximumX > xArray[i] ? maximumX : xArray[i];
                }

                return maximumX;
            }
        }

        #endregion

        #region 최소 X - MinimumY

        /// <summary>
        /// 최소 X
        /// </summary>
        public double MinimumY
        {
            get
            {
                double[] yArray = YArray;

                if(yArray == null)
                {
                    return 0;
                }

                if(yArray.Length < 1)
                {
                    return 0;
                }

                double minimumY = yArray[0];

                for(int i = 0; i < yArray.Length; i++)
                {
                    minimumY = minimumY < yArray[i] ? minimumY : yArray[i];
                }

                return minimumY;
            }
        }

        #endregion
        #region 최대 Y - MaximumY

        /// <summary>
        /// 최대 Y
        /// </summary>
        public double MaximumY
        {
            get
            {
                double[] yArray = YArray;

                if(yArray == null)
                {
                    return 0;
                }

                if(yArray.Length < 1)
                {
                    return 0;
                }

                double maximumY = yArray[0];

                for(int i = 0; i < yArray.Length; i++)
                {
                    maximumY = maximumY > yArray[i] ? maximumY : yArray[i];
                }

                return maximumY;
            }
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 업데이트하기 - Update(xArray, yArray)

        /// <summary>
        /// 업데이트하기
        /// </summary>
        /// <param name="xArray">X 배열</param>
        /// <param name="yArray">Y 배열</param>
        public void Update(float[] xArray, float[] yArray)
        {
            if(xArray != null)
            {
                bool resize = XArray == null ? true : XArray.Length == xArray.Length ? false : true;

                double[] newXArray = resize ? new double[xArray.Length] : XArray;

                for(int i = 0; i < xArray.Length; i++)
                {
                    newXArray[i] = xArray[i];
                }

                XArray = newXArray;
            }
            else
            {
                XArray = null;
            }

            if(yArray != null)
            {
                bool resize = YArray == null ? true : YArray.Length == yArray.Length ? false : true;

                double[] newYArray = resize ? new double[yArray.Length] : YArray;

                for(int i = 0; i < yArray.Length; i++)
                {
                    newYArray[i] = yArray[i];
                }

                YArray = newYArray;
            }
            else
            {
                YArray = null;
            }
        }

        #endregion
        #region 업데이트하기 - Update(yArray)

        /// <summary>
        /// 업데이트하기
        /// </summary>
        /// <param name="yArray">Y 배열</param>
        public void Update(float[] yArray)
        {
            Update(null, yArray);
        }

        #endregion

        #region 업데이트하기 - Update(xArray, yArray)

        /// <summary>
        /// 업데이트하기
        /// </summary>
        /// <param name="xArray">X 배열</param>
        /// <param name="yArray">Y 배열</param>
        public void Update(double[] xArray, double[] yArray)
        {
            if(xArray != null)
            {
                bool resize = XArray == null ? true : XArray.Length == xArray.Length ? false : true;

                double[] newXArray = resize ? new double[xArray.Length] : XArray;

                for(int i = 0; i < xArray.Length; i++)
                {
                    newXArray[i] = xArray[i];
                }

                XArray = newXArray;
            }
            else
            {
                XArray = null;
            }

            if(yArray != null)
            {
                bool resize = YArray == null ? true : YArray.Length == yArray.Length ? false : true;

                double[] newYArray = resize ? new double[yArray.Length] : YArray;

                for(int i = 0; i < yArray.Length; i++)
                {
                    newYArray[i] = yArray[i];
                }

                YArray = newYArray;
            }
            else
            {
                YArray = null;
            }
        }

        #endregion
        #region 업데이트하기 - Update(yArray)

        /// <summary>
        /// 업데이트하기
        /// </summary>
        /// <param name="yArray">Y 배열</param>
        public void Update(double[] yArray)
        {
            Update(null, yArray);
        }

        #endregion

        #region 그리기 - Draw(graphics, reactangle, lowerX, upperX, lowerY, upperY)

        /// <summary>
        /// 그리기
        /// </summary>
        /// <param name="graphics">그래픽스</param>
        /// <param name="reactangle">사각형</param>
        /// <param name="lowerX">하한 X</param>
        /// <param name="upperX">상한 X</param>
        /// <param name="lowerY">하한 Y</param>
        /// <param name="upperY">상한 Y</param>
        public void Draw(Graphics graphics, Rectangle reactangle, double lowerX, double upperX, double lowerY, double upperY)
        {
            double[] xArray = XArray;
            double[] yArray = YArray;

            if(yArray == null)
            {
                return;
            }

            int length = xArray == null ? yArray.Length : yArray.Length > xArray.Length ? xArray.Length : yArray.Length;

            double endX = 0;
            double endY = 0;

            upperX = upperX == lowerX ? lowerX + 1 : upperX;
            upperY = upperY == lowerY ? lowerY + 1 : upperY;

            double xScale = reactangle.Width  / (upperX - lowerX);
            double yScale = reactangle.Height / (upperY - lowerY);

            using(Pen pen = new Pen(LineColor, LineWidth))
            {
                for(int i = 0; i < length; i++)
                {
                    double startX = xArray == null ? i : xArray[i];
                    double startY = yArray[i];

                    startX = reactangle.X + ((startX - lowerX) * xScale);
                    startY = reactangle.Y + reactangle.Height - ((startY - lowerY) * yScale);

                    if(i != 0)
                    {
                        graphics.DrawLine(pen, (float)startX, (float)startY, (float)endX, (float)endY);
                    }

                    endX = startX;
                    endY = startY;
                }
            }
        }

        #endregion
    }
}

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using System.Drawing;

namespace TestProject

{

/// <summary>

/// 선

/// </summary>

public class Line

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Public

#region Field

/// <summary>

/// 명칭

/// </summary>

public string Name = string.Empty;

/// <summary>

/// 표시 여부

/// </summary>

public bool Visible = true;

/// <summary>

/// X 배열

/// </summary>

/// <remarks>NULL인 경우 Y 인덱스를 사용한다.</remarks>

public double[] XArray = null;

/// <summary>

/// Y 배열

/// </summary>

public double[] YArray = null;

/// <summary>

/// 선 색상

/// </summary>

public Color LineColor = Color.Black;

/// <summary>

/// 선 너비

/// </summary>

public float LineWidth = 1f;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Property

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 최소 X - MinimumX

/// <summary>

/// 최소 X

/// </summary>

public double MinimumX

{

get

{

double [] xArray = XArray;

if(xArray == null)

{

return 0;

}

if(xArray.Length < 1)

{

return 0;

}

double minimumX = xArray[0];

for(int i = 0; i < xArray.Length; i++)

{

minimumX = minimumX < xArray[i] ? minimumX : xArray[i];

}

return minimumX;

}

#endregion

#region 최대 X - MaximumX

/// <summary>

/// 최대 X

/// </summary>

public double MaximumX

{

get

{

double[] xArray = XArray;

if(xArray == null)

{

double[] yArray = YArray;

if(yArray == null)

{

return 0;

}

return yArray.Length;

}

if(xArray.Length < 1)

{

return 0;

}

double maximumX = xArray[0];

for(int i = 0; i < xArray.Length; i++)

{

maximumX = maximumX > xArray[i] ? maximumX : xArray[i];

}

return maximumX;

}

#endregion

#region 최소 X - MinimumY

/// <summary>

/// 최소 X

/// </summary>

public double MinimumY

{

get

{

double[] yArray = YArray;

if(yArray == null)

{

return 0;

}

if(yArray.Length < 1)

{

return 0;

}

double minimumY = yArray[0];

for(int i = 0; i < yArray.Length; i++)

{

minimumY = minimumY < yArray[i] ? minimumY : yArray[i];

}

return minimumY;

}

#endregion

#region 최대 Y - MaximumY

/// <summary>

/// 최대 Y

/// </summary>

public double MaximumY

{

get

{

double[] yArray = YArray;

if(yArray == null)

{

return 0;

}

if(yArray.Length < 1)

{

return 0;

}

double maximumY = yArray[0];

for(int i = 0; i < yArray.Length; i++)

{

maximumY = maximumY > yArray[i] ? maximumY : yArray[i];

}

return maximumY;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 업데이트하기 - Update(xArray, yArray)

/// <summary>

/// 업데이트하기

/// </summary>

/// <param name="xArray">X 배열</param>

/// <param name="yArray">Y 배열</param>

public void Update(float[] xArray, float[] yArray)

{

if(xArray != null)

{

bool resize = XArray == null ? true : XArray.Length == xArray.Length ? false : true;

double[] newXArray = resize ? new double[xArray.Length] : XArray;

for(int i = 0; i < xArray.Length; i++)

{

newXArray[i] = xArray[i];

}

XArray = newXArray;

}

else

{

XArray = null;

}

if(yArray != null)

{

bool resize = YArray == null ? true : YArray.Length == yArray.Length ? false : true;

double[] newYArray = resize ? new double[yArray.Length] : YArray;

for(int i = 0; i < yArray.Length; i++)

{

newYArray[i] = yArray[i];

}

YArray = newYArray;

}

else

{

YArray = null;

}

#endregion

#region 업데이트하기 - Update(yArray)

/// <summary>

/// 업데이트하기

/// </summary>

/// <param name="yArray">Y 배열</param>

public void Update(float[] yArray)

{

Update(null, yArray);

}

#endregion

#region 업데이트하기 - Update(xArray, yArray)

/// <summary>

/// 업데이트하기

/// </summary>

/// <param name="xArray">X 배열</param>

/// <param name="yArray">Y 배열</param>

public void Update(double[] xArray, double[] yArray)

{

if(xArray != null)

{

bool resize = XArray == null ? true : XArray.Length == xArray.Length ? false : true;

double[] newXArray = resize ? new double[xArray.Length] : XArray;

for(int i = 0; i < xArray.Length; i++)

{

newXArray[i] = xArray[i];

}

XArray = newXArray;

}

else

{

XArray = null;

}

if(yArray != null)

{

bool resize = YArray == null ? true : YArray.Length == yArray.Length ? false : true;

double[] newYArray = resize ? new double[yArray.Length] : YArray;

for(int i = 0; i < yArray.Length; i++)

{

newYArray[i] = yArray[i];

}

YArray = newYArray;

}

else

{

YArray = null;

}

#endregion

#region 업데이트하기 - Update(yArray)

/// <summary>

/// 업데이트하기

/// </summary>

/// <param name="yArray">Y 배열</param>

public void Update(double[] yArray)

{

Update(null, yArray);

}

#endregion

#region 그리기 - Draw(graphics, reactangle, lowerX, upperX, lowerY, upperY)

/// <summary>

/// 그리기

/// </summary>

/// <param name="graphics">그래픽스</param>

/// <param name="reactangle">사각형</param>

/// <param name="lowerX">하한 X</param>

/// <param name="upperX">상한 X</param>

/// <param name="lowerY">하한 Y</param>

/// <param name="upperY">상한 Y</param>

public void Draw(Graphics graphics, Rectangle reactangle, double lowerX, double upperX, double lowerY, double upperY)

{

double[] xArray = XArray;

double[] yArray = YArray;

if(yArray == null)

{

return;

}

int length = xArray == null ? yArray.Length : yArray.Length > xArray.Length ? xArray.Length : yArray.Length;

double endX = 0;

double endY = 0;

upperX = upperX == lowerX ? lowerX + 1 : upperX;

upperY = upperY == lowerY ? lowerY + 1 : upperY;

double xScale = reactangle.Width / (upperX - lowerX);

double yScale = reactangle.Height / (upperY - lowerY);

using(Pen pen = new Pen(LineColor, LineWidth))

{

for(int i = 0; i < length; i++)

{

double startX = xArray == null ? i : xArray[i];

double startY = yArray[i];

startX = reactangle.X + ((startX - lowerX) * xScale);

startY = reactangle.Y + reactangle.Height - ((startY - lowerY) * yScale);

if(i != 0)

{

graphics.DrawLine(pen, (float)startX, (float)startY, (float)endX, (float)endY);

}

endX = startX;

endY = startY;

}

#endregion

}

▶ GraphControl.cs


using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;

namespace TestProject
{
    /// <summary>
    /// 그래프 컨트롤
    /// </summary>
    public partial class GraphControl : UserControl
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 텍스트 색상
        /// </summary>
        public Color TextColor = Color.Black;

        /// <summary>
        /// 선 리스트
        /// </summary>
        public List<Line> LineList = new List<Line>();

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Protected

        #region Field

        /// <summary>
        /// 후면 버퍼 비트맵
        /// </summary>
        protected Bitmap backBufferBitmap = null;

        /// <summary>
        /// 전면 버퍼 비트맵
        /// </summary>
        protected Bitmap frontBufferBitmap = null;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 레전드 표시 여부 - ShowLegend

        /// <summary>
        /// 레전드 표시 여부
        /// </summary>
        public bool ShowLegend { get; set; }

        #endregion
        #region 축 표시 여부 - ShowAxis

        /// <summary>
        /// 축 표시 여부
        /// </summary>
        public bool ShowAxis { get; set; }

        #endregion
        #region 그리드 표시 여부 - ShowGrid

        /// <summary>
        /// 그리드 표시 여부
        /// </summary>
        public bool ShowGrid { get; set; }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - GraphControl()

        /// <summary>
        /// 생성자
        /// </summary>
        public GraphControl()
        {
            InitializeComponent();

            ShowLegend = true;
            ShowAxis   = true;
            ShowGrid   = true;

            this.timer.Tick        += timer_Tick;
            this.pictureBox.Resize += pictureBox_Resize;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 타이머 시작하기 - StartTimer()

        /// <summary>
        /// 타이머 시작하기
        /// </summary>
        public void StartTimer()
        {
            this.timer.Enabled = true;
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Protected

        #region 버퍼 크기 변경하기 - ResizeBuffer()

        /// <summary>
        /// 버퍼 크기 변경하기
        /// </summary>
        protected void ResizeBuffer()
        {
            int width  = this.pictureBox.Width;
            int height = this.pictureBox.Height;

            width  = width  < 10 ? 10 : width;
            height = height < 10 ? 10 : height;

            Bitmap previousBitmap = this.backBufferBitmap;

            if(previousBitmap == null)
            {
                this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
            }
            else
            {
                if((this.backBufferBitmap.Width != width) || (this.backBufferBitmap.Height != height))
                {
                    this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
                }
            }

            if(this.backBufferBitmap != previousBitmap)
            {
                if(previousBitmap != null)
                {
                    previousBitmap.Dispose();
                }
            }
        }

        #endregion
        #region 레전드 그리기 - DrawLegend(graphics, rectangle, legendList, colorList)

        /// <summary>
        /// 레전드 그리기
        /// </summary>
        /// <param name="graphics">그래픽스</param>
        /// <param name="rectangle">사각형</param>
        /// <param name="legendList">레전드 리스트</param>
        /// <param name="colorList">색상 리스트</param>
        protected void DrawLegend(Graphics graphics, Rectangle rectangle, List<string> legendList, List<Color> colorList)
        {
            int legentCount = legendList.Count;

            int rectangleX = rectangle.X;

            for(int i = 0; i < legendList.Count; i++)
            {
                int rectangleWidth = rectangle.X  + (rectangle.Width * (i + 1) / legentCount);

                using(SolidBrush fillBrush = new SolidBrush(colorList[i]))
                {
                    graphics.FillRectangle(fillBrush, rectangleX, rectangle.Y, rectangleWidth, rectangle.Height);
                }

                using(SolidBrush stringBrush = new SolidBrush(colorList[i].GetBrightness() > 0.5 ? Color.Black : Color.White))
                {
                    SizeF legendSize = graphics.MeasureString(legendList[i], Font);

                    PointF legentPoint = new PointF
                    (
                        (float)(0.5 * (rectangleWidth + rectangleX - legendSize.Width)),
                        (float)(rectangle.Y + 0.5 * (legendSize.Height - legendSize.Height))
                    );

                    graphics.DrawString(legendList[i], Font, stringBrush, legentPoint);
                }

                rectangleX = rectangleWidth;
            }
        }

        #endregion
        #region 그래프 칠하기 - PaintGraph(graphics, width, height)

        /// <summary>
        /// 그래프 칠하기
        /// </summary>
        /// <param name="graphics">그래픽스</param>
        /// <param name="width">너비</param>
        /// <param name="height">높이</param>
        protected void PaintGraph(Graphics graphics, int width, int height)
        {
            double upperX = 0d;
            double lowerX = 0d;
            double upperY = 0d;
            double lowerY = 0d;

            bool foundFirst = false;

            List<string> legendList = new List<string>();
            List<Color>  colorList  = new List<Color>();

            for(int i = 0; i < LineList.Count; i++)
            {
                if(LineList[i] == null)
                {
                    continue;
                }

                if(LineList[i].Visible == false)
                {
                    continue;
                }

                if(!foundFirst)
                {
                    upperX = LineList[i].MaximumX;
                    lowerX = LineList[i].MinimumX;
                    upperY = LineList[i].MaximumY;
                    lowerY = LineList[i].MinimumY;

                    foundFirst = true;
                }

                legendList.Add(LineList[i].Name     );
                colorList.Add (LineList[i].LineColor);

                upperX = upperX > LineList[i].MaximumX ? upperX : LineList[i].MaximumX;
                lowerX = lowerX < LineList[i].MinimumX ? lowerX : LineList[i].MinimumX;
                upperY = upperY > LineList[i].MaximumY ? upperY : LineList[i].MaximumY;
                lowerY = lowerY < LineList[i].MinimumY ? lowerY : LineList[i].MinimumY;
            }

            graphics.Clear(BackColor);

            Rectangle drawRectangle = new Rectangle(0, 0, width, height);

            if(ShowLegend)
            {
                int legendHeight = 5 + (int)graphics.MeasureString("AjtW", Font).Height;

                if(height - legendHeight > 10)
                {
                    drawRectangle = new Rectangle(0, 0, width, height - legendHeight);

                    Rectangle legendRectangle = new Rectangle(0, height - legendHeight + 2, width, legendHeight - 2);

                    DrawLegend(graphics, legendRectangle, legendList, colorList);
                }
            }

            if(ShowAxis)
            {
                // 추후 추가
            }

            if(!foundFirst)
            {
                return;
            }

            for(int i = 0; i < LineList.Count; i++)
            {
                if(LineList[i] == null)
                {
                    continue;
                }

                if(LineList[i].Visible == false)
                {
                    continue;
                }

                LineList[i].Draw(graphics, drawRectangle, lowerX, upperX, lowerY, upperY);
            }
        }

        #endregion
        #region 버퍼 교체하기 - SwapBuffer()

        /// <summary>
        /// 버퍼 교체하기
        /// </summary>
        protected void SwapBuffer()
        {
            Bitmap temporaryBitmap = this.frontBufferBitmap;

            this.frontBufferBitmap = this.backBufferBitmap;

            this.backBufferBitmap = temporaryBitmap;
        }

        #endregion
        #region 그래프 그리기 - DrawGraph()

        /// <summary>
        /// 그래프 그리기
        /// </summary>
        protected void DrawGraph()
        {
            ResizeBuffer();

            using(Graphics graphics = Graphics.FromImage(this.backBufferBitmap))
            {
                PaintGraph(graphics, this.backBufferBitmap.Width, this.backBufferBitmap.Height);
            }

            SwapBuffer();

            this.pictureBox.Image = this.frontBufferBitmap;
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 타이머 틱 처리하기 - timer_Tick(sender, e)

        /// <summary>
        /// 타이머 틱 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void timer_Tick(object sender, EventArgs e)
        {
            DrawGraph();
        }

        #endregion
        #region 픽처 박스 크기 조정시 처리하기 - pictureBox_Resize(sender, e)

        /// <summary>
        /// 픽처 박스 크기 조정시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void pictureBox_Resize(object sender, EventArgs e)
        {
            StartTimer();
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Drawing;

using System.Drawing.Imaging;

using System.Windows.Forms;

namespace TestProject

{

/// <summary>

/// 그래프 컨트롤

/// </summary>

public partial class GraphControl : UserControl

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Public

#region Field

/// <summary>

/// 텍스트 색상

/// </summary>

public Color TextColor = Color.Black;

/// <summary>

/// 선 리스트

/// </summary>

public List<Line> LineList = new List<Line>();

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Protected

#region Field

/// <summary>

/// 후면 버퍼 비트맵

/// </summary>

protected Bitmap backBufferBitmap = null;

/// <summary>

/// 전면 버퍼 비트맵

/// </summary>

protected Bitmap frontBufferBitmap = null;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Property

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 레전드 표시 여부 - ShowLegend

/// <summary>

/// 레전드 표시 여부

/// </summary>

public bool ShowLegend { get; set; }

#endregion

#region 축 표시 여부 - ShowAxis

/// <summary>

/// 축 표시 여부

/// </summary>

public bool ShowAxis { get; set; }

#endregion

#region 그리드 표시 여부 - ShowGrid

/// <summary>

/// 그리드 표시 여부

/// </summary>

public bool ShowGrid { get; set; }

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - GraphControl()

/// <summary>

/// 생성자

/// </summary>

public GraphControl()

{

InitializeComponent();

ShowLegend = true;

ShowAxis = true;

ShowGrid = true;

this.timer.Tick += timer_Tick;

this.pictureBox.Resize += pictureBox_Resize;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 타이머 시작하기 - StartTimer()

/// <summary>

/// 타이머 시작하기

/// </summary>

public void StartTimer()

{

this.timer.Enabled = true;

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Protected

#region 버퍼 크기 변경하기 - ResizeBuffer()

/// <summary>

/// 버퍼 크기 변경하기

/// </summary>

protected void ResizeBuffer()

{

int width = this.pictureBox.Width;

int height = this.pictureBox.Height;

width = width < 10 ? 10 : width;

height = height < 10 ? 10 : height;

Bitmap previousBitmap = this.backBufferBitmap;

if(previousBitmap == null)

{

this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);

}

else

{

if((this.backBufferBitmap.Width != width) || (this.backBufferBitmap.Height != height))

{

this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);

}

if(this.backBufferBitmap != previousBitmap)

{

if(previousBitmap != null)

{

previousBitmap.Dispose();

}

#endregion

#region 레전드 그리기 - DrawLegend(graphics, rectangle, legendList, colorList)

/// <summary>

/// 레전드 그리기

/// </summary>

/// <param name="graphics">그래픽스</param>

/// <param name="rectangle">사각형</param>

/// <param name="legendList">레전드 리스트</param>

/// <param name="colorList">색상 리스트</param>

protected void DrawLegend(Graphics graphics, Rectangle rectangle, List<string> legendList, List<Color> colorList)

{

int legentCount = legendList.Count;

int rectangleX = rectangle.X;

for(int i = 0; i < legendList.Count; i++)

{

int rectangleWidth = rectangle.X + (rectangle.Width * (i + 1) / legentCount);

using(SolidBrush fillBrush = new SolidBrush(colorList[i]))

{

graphics.FillRectangle(fillBrush, rectangleX, rectangle.Y, rectangleWidth, rectangle.Height);

}

using(SolidBrush stringBrush = new SolidBrush(colorList[i].GetBrightness() > 0.5 ? Color.Black : Color.White))

{

SizeF legendSize = graphics.MeasureString(legendList[i], Font);

PointF legentPoint = new PointF

(

(float)(0.5 * (rectangleWidth + rectangleX - legendSize.Width)),

(float)(rectangle.Y + 0.5 * (legendSize.Height - legendSize.Height))

);

graphics.DrawString(legendList[i], Font, stringBrush, legentPoint);

}

rectangleX = rectangleWidth;

}

#endregion

#region 그래프 칠하기 - PaintGraph(graphics, width, height)

/// <summary>

/// 그래프 칠하기

/// </summary>

/// <param name="graphics">그래픽스</param>

/// <param name="width">너비</param>

/// <param name="height">높이</param>

protected void PaintGraph(Graphics graphics, int width, int height)

{

double upperX = 0d;

double lowerX = 0d;

double upperY = 0d;

double lowerY = 0d;

bool foundFirst = false;

List<string> legendList = new List<string>();

List<Color> colorList = new List<Color>();

for(int i = 0; i < LineList.Count; i++)

{

if(LineList[i] == null)

{

continue;

}

if(LineList[i].Visible == false)

{

continue;

}

if(!foundFirst)

{

upperX = LineList[i].MaximumX;

lowerX = LineList[i].MinimumX;

upperY = LineList[i].MaximumY;

lowerY = LineList[i].MinimumY;

foundFirst = true;

}

legendList.Add(LineList[i].Name );

colorList.Add (LineList[i].LineColor);

upperX = upperX > LineList[i].MaximumX ? upperX : LineList[i].MaximumX;

lowerX = lowerX < LineList[i].MinimumX ? lowerX : LineList[i].MinimumX;

upperY = upperY > LineList[i].MaximumY ? upperY : LineList[i].MaximumY;

lowerY = lowerY < LineList[i].MinimumY ? lowerY : LineList[i].MinimumY;

}

graphics.Clear(BackColor);

Rectangle drawRectangle = new Rectangle(0, 0, width, height);

if(ShowLegend)

{

int legendHeight = 5 + (int)graphics.MeasureString("AjtW", Font).Height;

if(height - legendHeight > 10)

{

drawRectangle = new Rectangle(0, 0, width, height - legendHeight);

Rectangle legendRectangle = new Rectangle(0, height - legendHeight + 2, width, legendHeight - 2);

DrawLegend(graphics, legendRectangle, legendList, colorList);

}

if(ShowAxis)

{

// 추후 추가

}

if(!foundFirst)

{

return;

}

for(int i = 0; i < LineList.Count; i++)

{

if(LineList[i] == null)

{

continue;

}

if(LineList[i].Visible == false)

{

continue;

}

LineList[i].Draw(graphics, drawRectangle, lowerX, upperX, lowerY, upperY);

}

#endregion

#region 버퍼 교체하기 - SwapBuffer()

/// <summary>

/// 버퍼 교체하기

/// </summary>

protected void SwapBuffer()

{

Bitmap temporaryBitmap = this.frontBufferBitmap;

this.frontBufferBitmap = this.backBufferBitmap;

this.backBufferBitmap = temporaryBitmap;

}

#endregion

#region 그래프 그리기 - DrawGraph()

/// <summary>

/// 그래프 그리기

/// </summary>

protected void DrawGraph()

{

ResizeBuffer();

using(Graphics graphics = Graphics.FromImage(this.backBufferBitmap))

{

PaintGraph(graphics, this.backBufferBitmap.Width, this.backBufferBitmap.Height);

}

SwapBuffer();

this.pictureBox.Image = this.frontBufferBitmap;

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Private

//////////////////////////////////////////////////////////////////////////////// Event

#region 타이머 틱 처리하기 - timer_Tick(sender, e)

/// <summary>

/// 타이머 틱 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void timer_Tick(object sender, EventArgs e)

{

DrawGraph();

}

#endregion

#region 픽처 박스 크기 조정시 처리하기 - pictureBox_Resize(sender, e)

/// <summary>

/// 픽처 박스 크기 조정시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void pictureBox_Resize(object sender, EventArgs e)

{

StartTimer();

}

#endregion

}

▶ Stack.cs


using System;
using System.Drawing;

namespace TestProject
{
    /// <summary>
    /// 스택
    /// </summary>
    public class Stack
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Protected

        #region Field

        /// <summary>
        /// 색상 배열
        /// </summary>
        protected static Color[] _colorArray;

        /// <summary>
        /// 감마 수정 배열
        /// </summary>
        protected static int[] _gammaCorrectionArray = new int[1000];

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Instance
        //////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 색상 배열
        /// </summary>
        public Color[] ColorArray = null;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Static

        #region 생성자 - Stack()

        /// <summary>
        /// 생성자
        /// </summary>
        static Stack()
        {
            Color[] colorArray =
            {
                Color.Black,
                Color.Blue,
                Color.Green,
                Color.GreenYellow,
                Color.Yellow,
                Color.Orange,
                Color.OrangeRed,
                Color.Red
            };

            _colorArray = new Color[colorArray.Length * 100];

            int k = 0;

            for(int i = 0; i < colorArray.Length - 1; i++)
            {
                for(int j = 0; j < 100; j++)
                {
                    Color lowColor  = colorArray[i];
                    Color highColor = colorArray[i + 1];

                    int r = ((lowColor.R * (100 - j)) + (highColor.R * j)) / 100;
                    int g = ((lowColor.G * (100 - j)) + (highColor.G * j)) / 100;
                    int b = ((lowColor.B * (100 - j)) + (highColor.B * j)) / 100;

                    _colorArray[k++] = Color.FromArgb(r, g, b);
                }
            }

            float gammaCorrection = 0.3f;

            float gain = (float)((_colorArray.Length - 1) / Math.Pow(_gammaCorrectionArray.Length, gammaCorrection));

            for(int i = 0; i < _gammaCorrectionArray.Length; i++)
            {
                int value = (int)(gain * Math.Pow((double)i, gammaCorrection));

                value = value < 0 ? 0 : value > _colorArray.Length - 1 ? _colorArray.Length - 1 : value;

                _gammaCorrectionArray[i] = value;
            }
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Instance
        //////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - Stack(valueArray, minimumValue, maximumValue)

        /// <summary>
        /// 생성자
        /// </summary>
        /// <param name="valueArray">값 배열</param>
        /// <param name="maximumValue">최소 값</param>
        /// <param name="minimumValue">최대 값</param>
        public Stack(float[] valueArray, double minimumValue, double maximumValue)
        {
            float scale = (float)(_gammaCorrectionArray.Length / (maximumValue - minimumValue));

            ColorArray = new Color[valueArray.Length / 2];

            for(int i = 0; i < ColorArray.Length; i++)
            {
                int value = (int)((valueArray[i] - minimumValue) * scale);

                value = value < 0 ? 0 : value > _colorArray.Length - 1 ? _colorArray.Length - 1 : value;
                value = _gammaCorrectionArray[value];

                ColorArray[i] = _colorArray[value];
            }
        }

        #endregion
    }
}

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using System;

using System.Drawing;

namespace TestProject

{

/// <summary>

/// 스택

/// </summary>

public class Stack

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Protected

#region Field

/// <summary>

/// 색상 배열

/// </summary>

protected static Color[] _colorArray;

/// <summary>

/// 감마 수정 배열

/// </summary>

protected static int[] _gammaCorrectionArray = new int[1000];

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Instance

//////////////////////////////////////////////////////////////////////////////// Public

#region Field

/// <summary>

/// 색상 배열

/// </summary>

public Color[] ColorArray = null;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Static

#region 생성자 - Stack()

/// <summary>

/// 생성자

/// </summary>

static Stack()

{

Color[] colorArray =

{

Color.Black,

Color.Blue,

Color.Green,

Color.GreenYellow,

Color.Yellow,

Color.Orange,

Color.OrangeRed,

Color.Red

};

_colorArray = new Color[colorArray.Length * 100];

int k = 0;

for(int i = 0; i < colorArray.Length - 1; i++)

{

for(int j = 0; j < 100; j++)

{

Color lowColor = colorArray[i];

Color highColor = colorArray[i + 1];

int r = ((lowColor.R * (100 - j)) + (highColor.R * j)) / 100;

int g = ((lowColor.G * (100 - j)) + (highColor.G * j)) / 100;

int b = ((lowColor.B * (100 - j)) + (highColor.B * j)) / 100;

_colorArray[k++] = Color.FromArgb(r, g, b);

}

float gammaCorrection = 0.3f;

float gain = (float)((_colorArray.Length - 1) / Math.Pow(_gammaCorrectionArray.Length, gammaCorrection));

for(int i = 0; i < _gammaCorrectionArray.Length; i++)

{

int value = (int)(gain * Math.Pow((double)i, gammaCorrection));

value = value < 0 ? 0 : value > _colorArray.Length - 1 ? _colorArray.Length - 1 : value;

_gammaCorrectionArray[i] = value;

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Instance

//////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - Stack(valueArray, minimumValue, maximumValue)

/// <summary>

/// 생성자

/// </summary>

/// <param name="valueArray">값 배열</param>

/// <param name="maximumValue">최소 값</param>

/// <param name="minimumValue">최대 값</param>

public Stack(float[] valueArray, double minimumValue, double maximumValue)

{

float scale = (float)(_gammaCorrectionArray.Length / (maximumValue - minimumValue));

ColorArray = new Color[valueArray.Length / 2];

for(int i = 0; i < ColorArray.Length; i++)

{

int value = (int)((valueArray[i] - minimumValue) * scale);

value = value < 0 ? 0 : value > _colorArray.Length - 1 ? _colorArray.Length - 1 : value;

value = _gammaCorrectionArray[value];

ColorArray[i] = _colorArray[value];

}

#endregion

}

▶ SoundVisualizer.cs


using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.Threading;
using System.Windows.Forms;

namespace TestProject
{
    /// <summary>
    /// 사운드 시각화기
    /// </summary>
    public partial class SoundVisualizer : UserControl
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Protected

        #region Field

        /// <summary>
        /// 종료 여부
        /// </summary>
        protected bool closed = false;

        /// <summary>
        /// 후면 버퍼 비트맵
        /// </summary>
        protected Bitmap backBufferBitmap = null;

        /// <summary>
        /// 전면 버퍼 비트맵
        /// </summary>
        protected Bitmap frontBufferBitmap = null;

        /// <summary>
        /// 스택 리스트
        /// </summary>
        protected List<Stack> stackList = new List<Stack>();

        /// <summary>
        /// 스택 리스트 잠금 객체
        /// </summary>
        protected object stackListLockObject = new object();

        /// <summary>
        /// 최소 값
        /// </summary>
        protected float minimumValue = 0;

        /// <summary>
        /// 최대 값
        /// </summary>
        protected float maximumValue = 0;

        /// <summary>
        /// 값 배열 리스트
        /// </summary>
        protected List<float[]> valueArrayList = new List<float[]>();

        /// <summary>
        /// 스레드 잠금 객체
        /// </summary>
        protected object threadLockObject = new object();

        /// <summary>
        /// 작업 스레드
        /// </summary>
        protected Thread workThread = null;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Property
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 스펙트럼 너비 - SpectralWidth

        /// <summary>
        /// 스펙트럼 너비
        /// </summary>
        public int SpectralWidth { get; set; }

        #endregion
        #region FFT 데이터 표시 여부 - ShowFFT

        /// <summary>
        /// FFT 데이터 표시 여부
        /// </summary>
        public bool ShowFFT { get; set; }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - SoundVisualizer()

        /// <summary>
        /// 생성자
        /// </summary>
        public SoundVisualizer()
        {
            InitializeComponent();

            ShowFFT       = true;
            SpectralWidth = 256;

            Disposed               += UserControl_Disposed;
            this.pictureBox.Resize += pictureBox_Resize;
            this.timer.Tick        += timer_Tick;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 타이머 시작하기 - StartTimer()

        /// <summary>
        /// 타이머 시작하기
        /// </summary>
        public void StartTimer()
        {
            this.timer.Enabled = true;
        }

        #endregion
        #region 데이터 추가하기 - AppendData(valueArray)

        /// <summary>
        /// 데이터 추가하기
        /// </summary>
        /// <param name="valueArray">값</param>
        public void AppendData(float[] valueArray)
        {
            lock(this.threadLockObject)
            {
                this.valueArrayList.Add(valueArray);

                if(this.workThread == null)
                {
                    this.workThread = new Thread(new ThreadStart(ProcessWorkThread));

                    this.workThread.Name = "Sound visualization work thread.";

                    this.workThread.Start();
                }
            }
        }

        #endregion

        ////////////////////////////////////////////////////////////////////////////////////////// Protected
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 사용자 컨트롤 리소스 해제시 처리하기 - UserControl_Disposed(sender, e)

        /// <summary>
        /// 사용자 컨트롤 리소스 해제시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        protected void UserControl_Disposed(object sender, EventArgs e)
        {
            this.closed = true;
        }

        #endregion
        #region 픽처 박스 크기 조정시 처리하기 - pictureBox_Resize(sender, e)

        /// <summary>
        /// 픽처 박스 크기 조정시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        protected void pictureBox_Resize(object sender, EventArgs e)
        {
            this.timer.Enabled = true;
        }

        #endregion
        #region 타이머 틱 처리하기 - timer_Tick(object sender, EventArgs e)

        /// <summary>
        /// 타이머 틱 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void timer_Tick(object sender, EventArgs e)
        {
            Redraw();
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region  버퍼 크기 변경하기 - ResizeBuffer()

        /// <summary>
        /// 버퍼 크기 변경하기
        /// </summary>
        protected void ResizeBuffer()
        {
            int width  = this.pictureBox.Width;
            int height = SpectralWidth / 2;

            width  = width  < 10 ? 10 : width;
            height = height < 10 ? 10 : height;

            Bitmap previousButmap = this.backBufferBitmap;

            if(previousButmap == null)
            {
                this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
            }
            else
            {
                if((this.backBufferBitmap.Width != width) || (this.backBufferBitmap.Height != height))
                {
                    this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
                }
            }

            if(this.backBufferBitmap != previousButmap)
            {
                if(previousButmap != null)
                {
                    previousButmap.Dispose();
                }
            }
        }

        #endregion
        #region 그래프 칠하기 - PaintGraph(graphics, bitmap, width, height)

        /// <summary>
        /// 그래프 칠하기
        /// </summary>
        /// <param name="graphics"></param>
        /// <param name="bitmap">비트맵</param>
        /// <param name="width">너비</param>
        /// <param name="height">높이</param>
        protected void PaintGraph(Graphics graphics, Bitmap bitmap, int width, int height)
        {
            List<Stack> stackList = new List<Stack>();

            lock(this.stackListLockObject)
            {
                if(this.stackList.Count > 1)
                {
                    stackList.AddRange(this.stackList);

                    this.stackList.Clear();
                }
            }

            if(this.frontBufferBitmap == null)
            {
                graphics.Clear(Color.Black);
            }
            else
            {
                graphics.DrawImage(this.frontBufferBitmap, new Point(stackList.Count, 0));

                if(stackList.Count < 1)
                {
                    return;
                }
            }

            for(int i = 0; i < stackList.Count; i++)
            {
                int colorArrayLength = stackList[0].ColorArray.Length;

                for(int j = 0; j < height; j++)
                {
                    bitmap.SetPixel(i, colorArrayLength - j - 1, stackList[stackList.Count - 1 - i].ColorArray[j]);
                }
            }
        }

        #endregion
        #region 버퍼 교체하기 - SwapBuffer()

        /// <summary>
        /// 버퍼 교체하기
        /// </summary>
        protected void SwapBuffer()
        {
            Bitmap temporaryBitmap = this.frontBufferBitmap;

            this.frontBufferBitmap = this.backBufferBitmap;

            this.backBufferBitmap  = temporaryBitmap;
        }

        #endregion
        #region 다시 그리기 - Redraw()

        /// <summary>
        /// 다시 그리기
        /// </summary>
        protected void Redraw()
        {
            ResizeBuffer();

            using(Graphics graphics = Graphics.FromImage(this.backBufferBitmap))
            {
                PaintGraph(graphics, this.backBufferBitmap, this.backBufferBitmap.Width, this.backBufferBitmap.Height);
            }

            SwapBuffer();

            this.pictureBox.Image = this.frontBufferBitmap;
        }

        #endregion
        #region 스택 리스트 추가하기 - AddStackList(sourceValueArray)

        /// <summary>
        /// 스택 리스트 추가하기
        /// </summary>
        /// <param name="sourceValueArray">소스 값 배열</param>
        protected void AddStackList(float[] sourceValueArray)
        {
            List<Stack> stackList = new List<Stack>();

            int     k                  = 0;
            float[] temporarValueArray = new float[SpectralWidth];
            float[] fftArray           = new float[temporarValueArray.Length];

            int nextK = 0;

            while(k <= sourceValueArray.Length - temporarValueArray.Length)
            {
                nextK = k + (temporarValueArray.Length >> 3);

                for(int i = 0; i < temporarValueArray.Length; i++)
                {
                    temporarValueArray[i] = sourceValueArray[k++];
                }

                FFT.ComputeForwardFFT(temporarValueArray, fftArray);

                float[] targetValueArray = ShowFFT ? fftArray : temporarValueArray;

                float minmiumValue = targetValueArray[0];
                float maximumValue = targetValueArray[0];

                for(int i = 0; i < targetValueArray.Length; i++)
                {
                    minmiumValue = minmiumValue < targetValueArray[i] ? minmiumValue : targetValueArray[i];
                    maximumValue = maximumValue > targetValueArray[i] ? maximumValue : targetValueArray[i];
                }

                minmiumValue = float.IsNaN(minmiumValue) ? this.minimumValue : minmiumValue;
                maximumValue = float.IsNaN(maximumValue) ? this.maximumValue : maximumValue;

                minmiumValue = float.IsInfinity(minmiumValue) ? this.minimumValue : minmiumValue;
                maximumValue = float.IsInfinity(maximumValue) ? this.maximumValue : maximumValue;

                this.minimumValue = (255 * this.minimumValue + minmiumValue) / 256;
                this.maximumValue = (255 * this.maximumValue + maximumValue) / 256;

                stackList.Add(new Stack(targetValueArray, this.minimumValue, this.maximumValue));

                k = nextK;
            }

            lock(this.stackListLockObject)
            {
                this.stackList.AddRange(stackList);
            }
        }

        #endregion
        #region 작업 스레드 처리하기 - ProcessWorkThread()

        /// <summary>
        /// 작업 스레드 처리하기
        /// </summary>
        protected void ProcessWorkThread()
        {
            float[] lastValueArray = null;

            while(this.closed == false)
            {
                Thread.Sleep(100);

                float[] valueArray = null;

                lock(this.threadLockObject)
                {
                    if(this.valueArrayList.Count > 0)
                    {
                        valueArray = this.valueArrayList[0];

                        this.valueArrayList.RemoveAt(0);
                    }
                }

                if(valueArray != null)
                {
                    if(lastValueArray != null)
                    {
                        int spectralWidth = SpectralWidth;

                        float[] temporaryValueArray = new float[(int)(spectralWidth * 1.75f)];

                        int k                   = 0;
                        int swo                 = spectralWidth - (spectralWidth >> 3);
                        int lastValueArrayStart = lastValueArray.Length - swo;

                        lastValueArrayStart = lastValueArrayStart < 0 ? 0 : lastValueArrayStart;

                        for(int i = lastValueArrayStart; i < lastValueArray.Length; i++)
                        {
                            temporaryValueArray[k++] = lastValueArray[i];
                        }

                        for(int i = 0; i < swo && k < temporaryValueArray.Length && i < valueArray.Length; i++)
                        {
                            temporaryValueArray[k++] = valueArray[i];
                        }

                        AddStackList(temporaryValueArray);
                    }

                    AddStackList(valueArray);

                    lastValueArray = valueArray;
                }
            }
        }

        #endregion
    }
}

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using System;

using System.Collections.Generic;

using System.Drawing;

using System.Drawing.Imaging;

using System.Threading;

using System.Windows.Forms;

namespace TestProject

{

/// <summary>

/// 사운드 시각화기

/// </summary>

public partial class SoundVisualizer : UserControl

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Protected

#region Field

/// <summary>

/// 종료 여부

/// </summary>

protected bool closed = false;

/// <summary>

/// 후면 버퍼 비트맵

/// </summary>

protected Bitmap backBufferBitmap = null;

/// <summary>

/// 전면 버퍼 비트맵

/// </summary>

protected Bitmap frontBufferBitmap = null;

/// <summary>

/// 스택 리스트

/// </summary>

protected List<Stack> stackList = new List<Stack>();

/// <summary>

/// 스택 리스트 잠금 객체

/// </summary>

protected object stackListLockObject = new object();

/// <summary>

/// 최소 값

/// </summary>

protected float minimumValue = 0;

/// <summary>

/// 최대 값

/// </summary>

protected float maximumValue = 0;

/// <summary>

/// 값 배열 리스트

/// </summary>

protected List<float[]> valueArrayList = new List<float[]>();

/// <summary>

/// 스레드 잠금 객체

/// </summary>

protected object threadLockObject = new object();

/// <summary>

/// 작업 스레드

/// </summary>

protected Thread workThread = null;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Property

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 스펙트럼 너비 - SpectralWidth

/// <summary>

/// 스펙트럼 너비

/// </summary>

public int SpectralWidth { get; set; }

#endregion

#region FFT 데이터 표시 여부 - ShowFFT

/// <summary>

/// FFT 데이터 표시 여부

/// </summary>

public bool ShowFFT { get; set; }

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - SoundVisualizer()

/// <summary>

/// 생성자

/// </summary>

public SoundVisualizer()

{

InitializeComponent();

ShowFFT = true;

SpectralWidth = 256;

Disposed += UserControl_Disposed;

this.pictureBox.Resize += pictureBox_Resize;

this.timer.Tick += timer_Tick;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 타이머 시작하기 - StartTimer()

/// <summary>

/// 타이머 시작하기

/// </summary>

public void StartTimer()

{

this.timer.Enabled = true;

}

#endregion

#region 데이터 추가하기 - AppendData(valueArray)

/// <summary>

/// 데이터 추가하기

/// </summary>

/// <param name="valueArray">값</param>

public void AppendData(float[] valueArray)

{

lock(this.threadLockObject)

{

this.valueArrayList.Add(valueArray);

if(this.workThread == null)

{

this.workThread = new Thread(new ThreadStart(ProcessWorkThread));

this.workThread.Name = "Sound visualization work thread.";

this.workThread.Start();

}

#endregion

////////////////////////////////////////////////////////////////////////////////////////// Protected

//////////////////////////////////////////////////////////////////////////////// Event

#region 사용자 컨트롤 리소스 해제시 처리하기 - UserControl_Disposed(sender, e)

/// <summary>

/// 사용자 컨트롤 리소스 해제시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

protected void UserControl_Disposed(object sender, EventArgs e)

{

this.closed = true;

}

#endregion

#region 픽처 박스 크기 조정시 처리하기 - pictureBox_Resize(sender, e)

/// <summary>

/// 픽처 박스 크기 조정시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

protected void pictureBox_Resize(object sender, EventArgs e)

{

this.timer.Enabled = true;

}

#endregion

#region 타이머 틱 처리하기 - timer_Tick(object sender, EventArgs e)

/// <summary>

/// 타이머 틱 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void timer_Tick(object sender, EventArgs e)

{

Redraw();

}

#endregion

//////////////////////////////////////////////////////////////////////////////// Function

#region 버퍼 크기 변경하기 - ResizeBuffer()

/// <summary>

/// 버퍼 크기 변경하기

/// </summary>

protected void ResizeBuffer()

{

int width = this.pictureBox.Width;

int height = SpectralWidth / 2;

width = width < 10 ? 10 : width;

height = height < 10 ? 10 : height;

Bitmap previousButmap = this.backBufferBitmap;

if(previousButmap == null)

{

this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);

}

else

{

if((this.backBufferBitmap.Width != width) || (this.backBufferBitmap.Height != height))

{

this.backBufferBitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);

}

if(this.backBufferBitmap != previousButmap)

{

if(previousButmap != null)

{

previousButmap.Dispose();

}

#endregion

#region 그래프 칠하기 - PaintGraph(graphics, bitmap, width, height)

/// <summary>

/// 그래프 칠하기

/// </summary>

/// <param name="graphics"></param>

/// <param name="bitmap">비트맵</param>

/// <param name="width">너비</param>

/// <param name="height">높이</param>

protected void PaintGraph(Graphics graphics, Bitmap bitmap, int width, int height)

{

List<Stack> stackList = new List<Stack>();

lock(this.stackListLockObject)

{

if(this.stackList.Count > 1)

{

stackList.AddRange(this.stackList);

this.stackList.Clear();

}

if(this.frontBufferBitmap == null)

{

graphics.Clear(Color.Black);

}

else

{

graphics.DrawImage(this.frontBufferBitmap, new Point(stackList.Count, 0));

if(stackList.Count < 1)

{

return;

}

for(int i = 0; i < stackList.Count; i++)

{

int colorArrayLength = stackList[0].ColorArray.Length;

for(int j = 0; j < height; j++)

{

bitmap.SetPixel(i, colorArrayLength - j - 1, stackList[stackList.Count - 1 - i].ColorArray[j]);

}

#endregion

#region 버퍼 교체하기 - SwapBuffer()

/// <summary>

/// 버퍼 교체하기

/// </summary>

protected void SwapBuffer()

{

Bitmap temporaryBitmap = this.frontBufferBitmap;

this.frontBufferBitmap = this.backBufferBitmap;

this.backBufferBitmap = temporaryBitmap;

}

#endregion

#region 다시 그리기 - Redraw()

/// <summary>

/// 다시 그리기

/// </summary>

protected void Redraw()

{

ResizeBuffer();

using(Graphics graphics = Graphics.FromImage(this.backBufferBitmap))

{

PaintGraph(graphics, this.backBufferBitmap, this.backBufferBitmap.Width, this.backBufferBitmap.Height);

}

SwapBuffer();

this.pictureBox.Image = this.frontBufferBitmap;

}

#endregion

#region 스택 리스트 추가하기 - AddStackList(sourceValueArray)

/// <summary>

/// 스택 리스트 추가하기

/// </summary>

/// <param name="sourceValueArray">소스 값 배열</param>

protected void AddStackList(float[] sourceValueArray)

{

List<Stack> stackList = new List<Stack>();

int k = 0;

float[] temporarValueArray = new float[SpectralWidth];

float[] fftArray = new float[temporarValueArray.Length];

int nextK = 0;

while(k <= sourceValueArray.Length - temporarValueArray.Length)

{

nextK = k + (temporarValueArray.Length >> 3);

for(int i = 0; i < temporarValueArray.Length; i++)

{

temporarValueArray[i] = sourceValueArray[k++];

}

FFT.ComputeForwardFFT(temporarValueArray, fftArray);

float[] targetValueArray = ShowFFT ? fftArray : temporarValueArray;

float minmiumValue = targetValueArray[0];

float maximumValue = targetValueArray[0];

for(int i = 0; i < targetValueArray.Length; i++)

{

minmiumValue = minmiumValue < targetValueArray[i] ? minmiumValue : targetValueArray[i];

maximumValue = maximumValue > targetValueArray[i] ? maximumValue : targetValueArray[i];

}

minmiumValue = float.IsNaN(minmiumValue) ? this.minimumValue : minmiumValue;

maximumValue = float.IsNaN(maximumValue) ? this.maximumValue : maximumValue;

minmiumValue = float.IsInfinity(minmiumValue) ? this.minimumValue : minmiumValue;

maximumValue = float.IsInfinity(maximumValue) ? this.maximumValue : maximumValue;

this.minimumValue = (255 * this.minimumValue + minmiumValue) / 256;

this.maximumValue = (255 * this.maximumValue + maximumValue) / 256;

stackList.Add(new Stack(targetValueArray, this.minimumValue, this.maximumValue));

k = nextK;

}

lock(this.stackListLockObject)

{

this.stackList.AddRange(stackList);

}

#endregion

#region 작업 스레드 처리하기 - ProcessWorkThread()

/// <summary>

/// 작업 스레드 처리하기

/// </summary>

protected void ProcessWorkThread()

{

float[] lastValueArray = null;

while(this.closed == false)

{

Thread.Sleep(100);

float[] valueArray = null;

lock(this.threadLockObject)

{

if(this.valueArrayList.Count > 0)

{

valueArray = this.valueArrayList[0];

this.valueArrayList.RemoveAt(0);

}

if(valueArray != null)

{

if(lastValueArray != null)

{

int spectralWidth = SpectralWidth;

float[] temporaryValueArray = new float[(int)(spectralWidth * 1.75f)];

int k = 0;

int swo = spectralWidth - (spectralWidth >> 3);

int lastValueArrayStart = lastValueArray.Length - swo;

lastValueArrayStart = lastValueArrayStart < 0 ? 0 : lastValueArrayStart;

for(int i = lastValueArrayStart; i < lastValueArray.Length; i++)

{

temporaryValueArray[k++] = lastValueArray[i];

}

for(int i = 0; i < swo && k < temporaryValueArray.Length && i < valueArray.Length; i++)

{

temporaryValueArray[k++] = valueArray[i];

}

AddStackList(temporaryValueArray);

}

AddStackList(valueArray);

lastValueArray = valueArray;

}

#endregion

}

▶

[C#/COMMON] WAV 파일 생성하기

■ WAV 파일을 생성하는 방법을 보여준다. ▶ WAVERIFF.cs


namespace TestProject
{
    /// <summary>
    /// WAVE RIFF
    /// </summary>
    public class WAVERIFF
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 청크 ID
        /// </summary>
        /// 4바이트 : 빅 엔디안
        /// 'RIFF' 문자를 저장한다.
        /// <remarks>
        /// </remarks>
        public string ChunkID;

        /// <summary>
        /// 청크 크기
        /// </summary>
        /// <remarks>
        /// 4바이트 : 리틀 엔디안
        /// 전체 파일 크기 - 8
        /// </remarks>
        public uint ChunkSize;

        /// <summary>
        /// 포맷
        /// </summary>
        /// <remarks>
        /// 4바이트 : 빅 엔디안
        /// 파일 형식을 나타낸다.
        /// WAVE 파일의 경우 'WAVE' 문자를 저장한다.
        /// </remarks>
        public string Format;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - WAVERIFF()

        /// <summary>
        /// 생성자
        /// </summary>
        public WAVERIFF()
        {
            ChunkID   = "RIFF";
            ChunkSize = 0;
            Format    = "WAVE";
        }

        #endregion
    }
}

namespace TestProject

{

/// <summary>

/// WAVE RIFF

/// </summary>

public class WAVERIFF

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Public

#region Field

/// <summary>

/// 청크 ID

/// </summary>

/// 4바이트 : 빅 엔디안

/// 'RIFF' 문자를 저장한다.

/// <remarks>

/// </remarks>

public string ChunkID;

/// <summary>

/// 청크 크기

/// </summary>

/// <remarks>

/// 4바이트 : 리틀 엔디안

/// 전체 파일 크기 - 8

/// </remarks>

public uint ChunkSize;

/// <summary>

/// 포맷

/// </summary>

/// <remarks>

/// 4바이트 : 빅 엔디안

/// 파일 형식을 나타낸다.

/// WAVE 파일의 경우 'WAVE' 문자를 저장한다.

/// </remarks>

public string Format;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - WAVERIFF()

/// <summary>

/// 생성자

/// </summary>

public WAVERIFF()

{

ChunkID = "RIFF";

ChunkSize = 0;

Format = "WAVE";

}

#endregion

}

▶ WAVEFMT.cs


namespace TestProject
{
    /// <summary>
    /// WAVE FMT
    /// </summary>
    public class WAVEFMT
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 청크 ID
        /// </summary>
        /// <remarks>
        /// 4바이트 : 빅 엔디안
        /// 'fmt '라는 문자를 저장한다.
        /// </remarks>
        public string ChunkID;

        /// <summary>
        /// 청크 크기
        /// </summary>
        /// <remarks>
        /// 4바이트 : 리틀 엔디안
        /// ChunkSize 항목 이후 항목들의 크기를 저장한다.
        /// 고정 값 16을 저장한다.
        /// </remarks>
        public uint ChunkSize;

        /// <summary>
        /// 오디오 포맷
        /// </summary>
        /// <remarks>
        /// 2바이트 : 리틀 엔디안
        /// PCM의 경우 1을 저장한다.
        /// </remarks>
        public ushort AudioFormat;

        /// <summary>
        /// 채널 수
        /// </summary>
        /// <remarks>
        /// 2바이트 : 리틀 엔디안
        /// 모노     : 1, [data][data][data]...
        /// 스테레오 : 2, [left][right]...
        /// 3 채널   : 3, [left][right][center]...
        /// 쿼드     : 4, [front left][front right][rear left][rear right]...
        /// 4 채널   : 5, [left][center][right][surround]...
        /// 6 채널   : 6, [left center][left][center][right center][right][surround]...
        /// </remarks>
        public ushort ChannelCount;

        /// <summary>
        /// 초당 샘플 수
        /// </summary>
        /// <remarks>
        /// 4바이트 : 리틀 엔디안
        /// </remarks>
        public uint SampleCountPerSecond;

        /// <summary>
        /// 초당 평균 바이트 수
        /// </summary>
        /// <remarks>
        /// 4바이트 : 리틀 엔디안
        /// </remarks>
        public uint AverageByteCountPerSecond;

        /// <summary>
        /// 블럭 정렬
        /// </summary>
        /// <remarks>
        /// 2바이트 : 리틀 엔디안
        /// 샘플 프레임 크기
        /// 모노   : 샘플 크기 * 1
        /// 스테렝 : 샘플 크기 * 2
        /// </remarks>
        public ushort BlockAlignment;

        /// <summary>
        /// 샘플당 비트 수
        /// </summary>
        /// <remarks>
        /// 2바이트 : 리틀 엔디안
        /// </remarks>
        public ushort BitCountPerSample;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - WAVEFMT()

        /// <summary>
        /// 생성자
        /// </summary>
        public WAVEFMT()
        {
            ChunkID                   = "fmt ";
            ChunkSize                 = 16;
            AudioFormat               = 1;
            ChannelCount              = 2;
            SampleCountPerSecond      = 44100;
            BitCountPerSample         = 16;
            BlockAlignment            = (ushort)(ChannelCount * (BitCountPerSample / 8));
            AverageByteCountPerSecond = SampleCountPerSecond * BlockAlignment;
        }

        #endregion
    }
}

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namespace TestProject

{

/// <summary>

/// WAVE FMT

/// </summary>

public class WAVEFMT

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Public

#region Field

/// <summary>

/// 청크 ID

/// </summary>

/// <remarks>

/// 4바이트 : 빅 엔디안

/// 'fmt '라는 문자를 저장한다.

/// </remarks>

public string ChunkID;

/// <summary>

/// 청크 크기

/// </summary>

/// <remarks>

/// 4바이트 : 리틀 엔디안

/// ChunkSize 항목 이후 항목들의 크기를 저장한다.

/// 고정 값 16을 저장한다.

/// </remarks>

public uint ChunkSize;

/// <summary>

/// 오디오 포맷

/// </summary>

/// <remarks>

/// 2바이트 : 리틀 엔디안

/// PCM의 경우 1을 저장한다.

/// </remarks>

public ushort AudioFormat;

/// <summary>

/// 채널 수

/// </summary>

/// <remarks>

/// 2바이트 : 리틀 엔디안

/// 모노 : 1, [data][data][data]...

/// 스테레오 : 2, [left][right]...

/// 3 채널 : 3, [left][right][center]...

/// 쿼드 : 4, [front left][front right][rear left][rear right]...

/// 4 채널 : 5, [left][center][right][surround]...

/// 6 채널 : 6, [left center][left][center][right center][right][surround]...

/// </remarks>

public ushort ChannelCount;

/// <summary>

/// 초당 샘플 수

/// </summary>

/// <remarks>

/// 4바이트 : 리틀 엔디안

/// </remarks>

public uint SampleCountPerSecond;

/// <summary>

/// 초당 평균 바이트 수

/// </summary>

/// <remarks>

/// 4바이트 : 리틀 엔디안

/// </remarks>

public uint AverageByteCountPerSecond;

/// <summary>

/// 블럭 정렬

/// </summary>

/// <remarks>

/// 2바이트 : 리틀 엔디안

/// 샘플 프레임 크기

/// 모노 : 샘플 크기 * 1

/// 스테렝 : 샘플 크기 * 2

/// </remarks>

public ushort BlockAlignment;

/// <summary>

/// 샘플당 비트 수

/// </summary>

/// <remarks>

/// 2바이트 : 리틀 엔디안

/// </remarks>

public ushort BitCountPerSample;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - WAVEFMT()

/// <summary>

/// 생성자

/// </summary>

public WAVEFMT()

{

ChunkID = "fmt ";

ChunkSize = 16;

AudioFormat = 1;

ChannelCount = 2;

SampleCountPerSecond = 44100;

BitCountPerSample = 16;

BlockAlignment = (ushort)(ChannelCount * (BitCountPerSample / 8));

AverageByteCountPerSecond = SampleCountPerSecond * BlockAlignment;

}

#endregion

}

▶ WAVEDATA.cs


namespace TestProject
{
    /// <summary>
    /// WAVE 데이터
    /// </summary>
    public class WAVEDATA
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>
        /// 청크 ID
        /// </summary>
        /// <remarks>
        /// 4바이트 : 빅 엔디안
        /// 'data' 문자를 저장한다.
        /// </remarks>
        public string ChunkID;

        /// <summary>
        /// 청크 크기
        /// </summary>
        /// <remarks>
        /// 4바이트 : 리틀 엔디안
        /// </remarks>
        public uint ChunkSize;

        /// <summary>
        /// 값 배열
        /// </summary>
        public short[] ValueArray;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - WAVEDATA()

        /// <summary>
        /// 생성자
        /// </summary>
        public WAVEDATA()
        {
            ChunkID    = "data";
            ChunkSize  = 0;
            ValueArray = new short[0];
        }

        #endregion
    }
}

namespace TestProject

{

/// <summary>

/// WAVE 데이터

/// </summary>

public class WAVEDATA

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Public

#region Field

/// <summary>

/// 청크 ID

/// </summary>

/// <remarks>

/// 4바이트 : 빅 엔디안

/// 'data' 문자를 저장한다.

/// </remarks>

public string ChunkID;

/// <summary>

/// 청크 크기

/// </summary>

/// <remarks>

/// 4바이트 : 리틀 엔디안

/// </remarks>

public uint ChunkSize;

/// <summary>

/// 값 배열

/// </summary>

public short[] ValueArray;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - WAVEDATA()

/// <summary>

/// 생성자

/// </summary>

public WAVEDATA()

{

ChunkID = "data";

ChunkSize = 0;

ValueArray = new short[0];

}

#endregion

}

▶ WaveGenerator.cs


using System;
using System.IO;

namespace TestProject
{
    /// <summary>
    /// WAVE 제너레이터
    /// </summary>
    public class WaveGenerator
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 헤더
        /// </summary>
        private WAVERIFF header;

        /// <summary>
        /// 포맷
        /// </summary>
        private WAVEFMT format;

        /// <summary>
        /// 데이터
        /// </summary>
        private WAVEDATA data;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - WaveGenerator()

        /// <summary>
        /// 생성자
        /// </summary>
        public WaveGenerator()
        {
            this.header = new WAVERIFF();
            this.format = new WAVEFMT();
            this.data   = new WAVEDATA();

            uint sampleCount = this.format.SampleCountPerSecond * this.format.ChannelCount;

            this.data.ValueArray = new short[sampleCount];

            int    amplitude = 32760;  // 16비트 오디오용 최대 진폭
            double frequency = 440.0d; // Concert A : 440Hz
            double tone      = (Math.PI * 2 * frequency) / sampleCount;

            for(uint i = 0; i < sampleCount - 1; i++)
            {
                for(int channel = 0; channel < this.format.ChannelCount; channel++)
                {
                    this.data.ValueArray[i + channel] = Convert.ToInt16(amplitude * Math.Sin(tone * i));
                }
            }

            this.data.ChunkSize = (uint)(this.data.ValueArray.Length * (this.format.BitCountPerSample / 8));
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 저장하기 - Save(filePath)

        /// <summary>
        /// 저장하기
        /// </summary>
        /// <param name="filePath">파일 경로</param>
        public void Save(string filePath)
        {
            FileStream   stream = new FileStream(filePath, FileMode.Create);
            BinaryWriter writer = new BinaryWriter(stream);

            // RIFF
            writer.Write(header.ChunkID.ToCharArray());
            writer.Write(header.ChunkSize);
            writer.Write(header.Format.ToCharArray());

            // FMT
            writer.Write(format.ChunkID.ToCharArray());
            writer.Write(format.ChunkSize);
            writer.Write(format.AudioFormat);
            writer.Write(format.ChannelCount);
            writer.Write(format.SampleCountPerSecond);
            writer.Write(format.AverageByteCountPerSecond);
            writer.Write(format.BlockAlignment);
            writer.Write(format.BitCountPerSample);

            // DATA
            writer.Write(data.ChunkID.ToCharArray());
            writer.Write(data.ChunkSize);

            foreach(short value in data.ValueArray)
            {
                writer.Write(value);
            }

            writer.Seek(4, SeekOrigin.Begin);

            uint filesize = (uint)writer.BaseStream.Length;

            writer.Write(filesize - 8);

            writer.Close();

            stream.Close();
        }

        #endregion
    }
}

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using System;

using System.IO;

namespace TestProject

{

/// <summary>

/// WAVE 제너레이터

/// </summary>

public class WaveGenerator

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 헤더

/// </summary>

private WAVERIFF header;

/// <summary>

/// 포맷

/// </summary>

private WAVEFMT format;

/// <summary>

/// 데이터

/// </summary>

private WAVEDATA data;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - WaveGenerator()

/// <summary>

/// 생성자

/// </summary>

public WaveGenerator()

{

this.header = new WAVERIFF();

this.format = new WAVEFMT();

this.data = new WAVEDATA();

uint sampleCount = this.format.SampleCountPerSecond * this.format.ChannelCount;

this.data.ValueArray = new short[sampleCount];

int amplitude = 32760; // 16비트 오디오용 최대 진폭

double frequency = 440.0d; // Concert A : 440Hz

double tone = (Math.PI * 2 * frequency) / sampleCount;

for(uint i = 0; i < sampleCount - 1; i++)

{

for(int channel = 0; channel < this.format.ChannelCount; channel++)

{

this.data.ValueArray[i + channel] = Convert.ToInt16(amplitude * Math.Sin(tone * i));

}

this.data.ChunkSize = (uint)(this.data.ValueArray.Length * (this.format.BitCountPerSample / 8));

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 저장하기 - Save(filePath)

/// <summary>

/// 저장하기

/// </summary>

/// <param name="filePath">파일 경로</param>

public void Save(string filePath)

{

FileStream stream = new FileStream(filePath, FileMode.Create);

BinaryWriter writer = new BinaryWriter(stream);

// RIFF

writer.Write(header.ChunkID.ToCharArray());

writer.Write(header.ChunkSize);

writer.Write(header.Format.ToCharArray());

// FMT

writer.Write(format.ChunkID.ToCharArray());

writer.Write(format.ChunkSize);

writer.Write(format.AudioFormat);

writer.Write(format.ChannelCount);

writer.Write(format.SampleCountPerSecond);

writer.Write(format.AverageByteCountPerSecond);

writer.Write(format.BlockAlignment);

writer.Write(format.BitCountPerSample);

// DATA

writer.Write(data.ChunkID.ToCharArray());

writer.Write(data.ChunkSize);

foreach(short value in data.ValueArray)

{

writer.Write(value);

}

writer.Seek(4, SeekOrigin.Begin);

uint filesize = (uint)writer.BaseStream.Length;

writer.Write(filesize - 8);

writer.Close();

stream.Close();

}

#endregion

}

▶ Program.cs


namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        private static void Main()
        {
            WaveGenerator generator = new WaveGenerator();

            generator.Save("d:\\test.wav");
        }

        #endregion
    }
}

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

private static void Main()

{

WaveGenerator generator = new WaveGenerator();

generator.Save("d:\\test.wav");

}

#endregion

}

TestProject.zip

[C#/COMMON/NAUDIO] DirectSoundOut 클래스 : PlaybackStopped 이벤트를 사용해 반복 재생하기

■ DirectSoundOut 클래스의 PlaybackStopped 이벤트를 사용해 반복을 재생하는 방법을 보여준다. ▶ Program.cs


using System;
using System.IO;

using NAudio.Wave;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 파일 경로
        /// </summary>
        private static string _filePath = "sample.mp3";

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private
        ////////////////////////////////////////////////////////////////////// Event

        #region 다이렉트 사운드 출력 재생 중단시 처리하기 - directSoundOut_PlaybackStopped(sender, e)

        /// <summary>
        /// 다이렉트 사운드 출력 재생 중단시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private static void directSoundOut_PlaybackStopped(object sender, StoppedEventArgs e)
        {
            DirectSoundOut directSoundOut = sender as DirectSoundOut;

            PlaySound(directSoundOut, _filePath);
        }

        #endregion

        ////////////////////////////////////////////////////////////////////// Function

        #region 사운드 재생하기 - PlaySound(directSoundOut, filePath)

        /// <summary>
        /// 사운드 재생하기
        /// </summary>
        /// <param name="directSoundOut">다이렉트 사운드 출력</param>
        /// <param name="filePath">파일 경로</param>
        private static void PlaySound(DirectSoundOut directSoundOut, string filePath)
        {
            MemoryStream memoryStream = new MemoryStream();

            using(FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                byte[] bufferByteArray = new byte[32768];

                int byteCountRead;

                while((byteCountRead = fileStream.Read(bufferByteArray, 0, bufferByteArray.Length)) > 0)
                {
                    memoryStream.Write(bufferByteArray, 0, byteCountRead);
                }
            }

            memoryStream.Position = 0;

            BlockAlignReductionStream blockAlignReductionStream;

            if(filePath.EndsWith(".mp3"))
            {
                WaveStream waveStream = WaveFormatConversionStream.CreatePcmStream(new Mp3FileReader(memoryStream));

                blockAlignReductionStream = new BlockAlignReductionStream(waveStream);
            }
            else if(filePath.EndsWith(".wav"))
            {
                WaveStream waveStream = new WaveChannel32(new WaveFileReader(memoryStream));

                blockAlignReductionStream = new BlockAlignReductionStream(waveStream);
            }
            else
            {
                throw new InvalidOperationException("Not a correct audio file type");
            }

            directSoundOut.Init(blockAlignReductionStream);

            directSoundOut.Play();
        }

        #endregion
        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        private static void Main()
        {
            DirectSoundOut directSoundOut = new DirectSoundOut();

            directSoundOut.PlaybackStopped += directSoundOut_PlaybackStopped;

            PlaySound(directSoundOut, _filePath);

            Console.WriteLine("프로그램을 종료하기 위해서 아무 키나 눌러 주시기 바랍니다.");

            Console.ReadKey(true);
        }

        #endregion
    }
}

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using System;

using System.IO;

using NAudio.Wave;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 파일 경로

/// </summary>

private static string _filePath = "sample.mp3";

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

////////////////////////////////////////////////////////////////////// Event

#region 다이렉트 사운드 출력 재생 중단시 처리하기 - directSoundOut_PlaybackStopped(sender, e)

/// <summary>

/// 다이렉트 사운드 출력 재생 중단시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private static void directSoundOut_PlaybackStopped(object sender, StoppedEventArgs e)

{

DirectSoundOut directSoundOut = sender as DirectSoundOut;

PlaySound(directSoundOut, _filePath);

}

#endregion

////////////////////////////////////////////////////////////////////// Function

#region 사운드 재생하기 - PlaySound(directSoundOut, filePath)

/// <summary>

/// 사운드 재생하기

/// </summary>

/// <param name="directSoundOut">다이렉트 사운드 출력</param>

/// <param name="filePath">파일 경로</param>

private static void PlaySound(DirectSoundOut directSoundOut, string filePath)

{

MemoryStream memoryStream = new MemoryStream();

using(FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))

{

byte[] bufferByteArray = new byte[32768];

int byteCountRead;

while((byteCountRead = fileStream.Read(bufferByteArray, 0, bufferByteArray.Length)) > 0)

{

memoryStream.Write(bufferByteArray, 0, byteCountRead);

}

memoryStream.Position = 0;

BlockAlignReductionStream blockAlignReductionStream;

if(filePath.EndsWith(".mp3"))

{

WaveStream waveStream = WaveFormatConversionStream.CreatePcmStream(new Mp3FileReader(memoryStream));

blockAlignReductionStream = new BlockAlignReductionStream(waveStream);

}

else if(filePath.EndsWith(".wav"))

{

WaveStream waveStream = new WaveChannel32(new WaveFileReader(memoryStream));

blockAlignReductionStream = new BlockAlignReductionStream(waveStream);

}

else

{

throw new InvalidOperationException("Not a correct audio file type");

}

directSoundOut.Init(blockAlignReductionStream);

directSoundOut.Play();

}

#endregion

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

private static void Main()

{

DirectSoundOut directSoundOut = new DirectSoundOut();

directSoundOut.PlaybackStopped += directSoundOut_PlaybackStopped;

PlaySound(directSoundOut, _filePath);

Console.WriteLine("프로그램을 종료하기 위해서 아무 키나 눌러 주시기 바랍니다.");

Console.ReadKey(true);

}

#endregion

}

TestProject.zip

[C#/COMMON/NAUDIO] DirectSoundOut 클래스 : Init/Play 메소드를 사용해 사운드 재생하기

■ DirectSoundOut 클래스의 Init/Play 메소드를 사용해 사운드를 재생하는 방법을 보여준다. ▶ Program.cs


using System;
using System.IO;

using NAudio.Wave;

namespace TestProject
{
    /// <summary>
    /// 프로그램
    /// </summary>
    class Program
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Static
        //////////////////////////////////////////////////////////////////////////////// Private

        #region 사운드 재생하기 - PlaySound(filePath)

        /// <summary>
        /// 사운드 재생하기
        /// </summary>
        /// <param name="filePath">파일 경로</param>
        private static void PlaySound(string filePath)
        {
            MemoryStream memoryStream = new MemoryStream();

            using(FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
            {
                byte[] bufferByteArray = new byte[32768];

                int byteCountRead;

                while((byteCountRead = fileStream.Read(bufferByteArray, 0, bufferByteArray.Length)) > 0)
                {
                    memoryStream.Write(bufferByteArray, 0, byteCountRead);
                }
            }

            memoryStream.Position = 0;

            BlockAlignReductionStream blockAlignReductionStream;

            if(filePath.EndsWith(".mp3"))
            {
                WaveStream waveStream = WaveFormatConversionStream.CreatePcmStream(new Mp3FileReader(memoryStream));

                blockAlignReductionStream = new BlockAlignReductionStream(waveStream);
            }
            else if(filePath.EndsWith(".wav"))
            {
                WaveStream waveStream = new WaveChannel32(new WaveFileReader(memoryStream));

                blockAlignReductionStream = new BlockAlignReductionStream(waveStream);
            }
            else
            {
                throw new InvalidOperationException("Not a correct audio file type");
            }

            DirectSoundOut directSoundOut = new DirectSoundOut();

            directSoundOut.Init(blockAlignReductionStream);

            directSoundOut.Play();
        }

        #endregion
        #region 프로그램 시작하기 - Main()

        /// <summary>
        /// 프로그램 시작하기
        /// </summary>
        private static void Main()
        {
            PlaySound("sample.mp3");

            Console.WriteLine("프로그램을 종료하기 위해서 아무 키나 눌러 주시기 바랍니다.");

            Console.ReadKey(true);
        }

        #endregion
    }
}

using System;

using System.IO;

using NAudio.Wave;

namespace TestProject

{

/// <summary>

/// 프로그램

/// </summary>

class Program

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Static

//////////////////////////////////////////////////////////////////////////////// Private

#region 사운드 재생하기 - PlaySound(filePath)

/// <summary>

/// 사운드 재생하기

/// </summary>

/// <param name="filePath">파일 경로</param>

private static void PlaySound(string filePath)

{

MemoryStream memoryStream = new MemoryStream();

using(FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))

{

byte[] bufferByteArray = new byte[32768];

int byteCountRead;

while((byteCountRead = fileStream.Read(bufferByteArray, 0, bufferByteArray.Length)) > 0)

{

memoryStream.Write(bufferByteArray, 0, byteCountRead);

}

memoryStream.Position = 0;

BlockAlignReductionStream blockAlignReductionStream;

if(filePath.EndsWith(".mp3"))

{

WaveStream waveStream = WaveFormatConversionStream.CreatePcmStream(new Mp3FileReader(memoryStream));

blockAlignReductionStream = new BlockAlignReductionStream(waveStream);

}

else if(filePath.EndsWith(".wav"))

{

WaveStream waveStream = new WaveChannel32(new WaveFileReader(memoryStream));

blockAlignReductionStream = new BlockAlignReductionStream(waveStream);

}

else

{

throw new InvalidOperationException("Not a correct audio file type");

}

DirectSoundOut directSoundOut = new DirectSoundOut();

directSoundOut.Init(blockAlignReductionStream);

directSoundOut.Play();

}

#endregion

#region 프로그램 시작하기 - Main()

/// <summary>

/// 프로그램 시작하기

/// </summary>

private static void Main()

{

PlaySound("sample.mp3");

Console.WriteLine("프로그램을 종료하기 위해서 아무 키나 눌러 주시기 바랍니다.");

Console.ReadKey(true);

}

#endregion

}

TestProject.zip

[C#/WINFORM] SoundPlayer 클래스 : WAV 파일 재생하기

■ SoundPlayer 클래스를 사용해 WAV 파일을 재생하는 방법을 보여준다. ▶ MainForm.cs


using System;
using System.Media;
using System.Windows.Forms;

namespace TestProject
{
    /// <summary>
    /// 메인 폼
    /// </summary>
    public partial class MainForm : Form
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 파일 열기 대화 상자
        /// </summary>
        private OpenFileDialog openFileDialog;

        /// <summary>
        /// 사운드 플레이어
        /// </summary>
        private SoundPlayer soundPlayer = null;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainForm()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainForm()
        {
            InitializeComponent();

            this.openFileDialog = new OpenFileDialog();

            this.openFileDialog.RestoreDirectory = true;
            this.openFileDialog.CheckPathExists  = true;
            this.openFileDialog.CheckFileExists  = true;
            this.openFileDialog.Filter           = "WAV 파일(*.wav)|*.wav";
            this.openFileDialog.FilterIndex      = 1;
            this.openFileDialog.DefaultExt       = ".wav";

            this.openFileButton.Click += openButton_Click;
            this.playButton.Click     += startButton_Click;
            this.stopButton.Click     += stopButton_Click;
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region WAV 파일 열기 버튼 클릭시 처리하기 - openButton_Click(sender, e)

        /// <summary>
        /// WAV 파일 열기 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void openButton_Click(object sender, EventArgs e)
        {
            if(this.soundPlayer != null)
            {
                this.soundPlayer.Stop();

                this.soundPlayer.Dispose();

                this.soundPlayer = null;
            }

            if(this.openFileDialog.ShowDialog(this) == DialogResult.OK)
            {
                this.soundPlayer = new SoundPlayer(this.openFileDialog.FileName);
            }
        }

        #endregion
        #region 재생 시작 버튼 클릭시 처리하기 - startButton_Click(sender, e)

        /// <summary>
        /// 재생 시작 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void startButton_Click(object sender, EventArgs e)
        {
            if(this.soundPlayer != null)
            {
                this.soundPlayer.Stop();

                this.soundPlayer.Play();
            }
        }

        #endregion
        #region 재생 중단 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

        /// <summary>
        /// 재생 중단 버튼 클릭시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void stopButton_Click(object sender, EventArgs e)
        {
            if(this.soundPlayer != null)
            {
                this.soundPlayer.Stop();
            }
        }

        #endregion
    }
}

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using System;

using System.Media;

using System.Windows.Forms;

namespace TestProject

{

/// <summary>

/// 메인 폼

/// </summary>

public partial class MainForm : Form

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

////////////////////////////////////////////////////////////////////////////////////////// Private

#region Field

/// <summary>

/// 파일 열기 대화 상자

/// </summary>

private OpenFileDialog openFileDialog;

/// <summary>

/// 사운드 플레이어

/// </summary>

private SoundPlayer soundPlayer = null;

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

////////////////////////////////////////////////////////////////////////////////////////// Public

#region 생성자 - MainForm()

/// <summary>

/// 생성자

/// </summary>

public MainForm()

{

InitializeComponent();

this.openFileDialog = new OpenFileDialog();

this.openFileDialog.RestoreDirectory = true;

this.openFileDialog.CheckPathExists = true;

this.openFileDialog.CheckFileExists = true;

this.openFileDialog.Filter = "WAV 파일(*.wav)|*.wav";

this.openFileDialog.FilterIndex = 1;

this.openFileDialog.DefaultExt = ".wav";

this.openFileButton.Click += openButton_Click;

this.playButton.Click += startButton_Click;

this.stopButton.Click += stopButton_Click;

}

#endregion

//////////////////////////////////////////////////////////////////////////////////////////////////// Method

////////////////////////////////////////////////////////////////////////////////////////// Private

#region WAV 파일 열기 버튼 클릭시 처리하기 - openButton_Click(sender, e)

/// <summary>

/// WAV 파일 열기 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void openButton_Click(object sender, EventArgs e)

{

if(this.soundPlayer != null)

{

this.soundPlayer.Stop();

this.soundPlayer.Dispose();

this.soundPlayer = null;

}

if(this.openFileDialog.ShowDialog(this) == DialogResult.OK)

{

this.soundPlayer = new SoundPlayer(this.openFileDialog.FileName);

}

#endregion

#region 재생 시작 버튼 클릭시 처리하기 - startButton_Click(sender, e)

/// <summary>

/// 재생 시작 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void startButton_Click(object sender, EventArgs e)

{

if(this.soundPlayer != null)

{

this.soundPlayer.Stop();

this.soundPlayer.Play();

}

#endregion

#region 재생 중단 버튼 클릭시 처리하기 - stopButton_Click(sender, e)

/// <summary>

/// 재생 중단 버튼 클릭시 처리하기

/// </summary>

/// <param name="sender">이벤트 발생자</param>

/// <param name="e">이벤트 인자</param>

private void stopButton_Click(object sender, EventArgs e)

{

if(this.soundPlayer != null)

{

this.soundPlayer.Stop();

}

#endregion

}

TestProject.zip