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[C#/WINFORM/.NET5] 마이크 입력 스펙트로그램 표시하기

■ 마이크 입력 스펙트로그램을 표시하는 방법을 보여준다. ▶ ArgoColorMap.cs


using System;

namespace TestLibrary
{
    /// <summary>
    /// 아르고 색상 맵
    /// </summary>
    public class ArgoColorMap : IColorMap
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// RGB 배열
        /// </summary>
        private readonly int[] rgbArray =
        {
            00000000, 00000004, 00000264, 00000267, 00000527, 00000530, 00000789, 00066328,
            00066588, 00066591, 00066849, 00132388, 00132647, 00132650, 00132908, 00198447,
            00198706, 00198708, 00264503, 00264505, 00330299, 00330557, 00330560, 00396354,
            00396612, 00462150, 00462408, 00527946, 00528204, 00593998, 00594000, 00659794,
            00660052, 00725590, 00791383, 00791641, 00857435, 00857437, 00923230, 00989024,
            00989026, 01054819, 01120613, 01120870, 01186408, 01252201, 01252459, 01318252,
            01384046, 01384047, 01449841, 01515634, 01515892, 01581429, 01647222, 01713016,
            01713273, 01779066, 01844860, 01910397, 01976190, 01976447, 02042241, 02108034,
            02173827, 02239364, 02239621, 02305415, 02371208, 02437001, 02502794, 02568587,
            02568844, 02634381, 02700174, 02765968, 02831761, 02897554, 02963347, 03029140,
            03029397, 03095190, 03160983, 03226520, 03292313, 03358106, 03423899, 03489692,
            03555485, 03621278, 03687071, 03752864, 03818656, 03884449, 03950242, 04016035,
            04081828, 04147621, 04147878, 04213671, 04279464, 04345256, 04411049, 04476842,
            04542635, 04608428, 04739757, 04805550, 04871342, 04937135, 05002928, 05068721,
            05134514, 05200306, 05266099, 05331892, 05397685, 05463477, 05529270, 05595063,
            05660856, 05726648, 05792441, 05858234, 05924027, 05989819, 06121148, 06186941,
            06252734, 06318526, 06384319, 06450112, 06515904, 06581953, 06647746, 06779074,
            06844867, 06910660, 06976452, 07042245, 07108038, 07173830, 07239623, 07370952,
            07436744, 07502793, 07568586, 07634378, 07700171, 07765964, 07897292, 07963085,
            08028877, 08094670, 08160719, 08226511, 08357840, 08423632, 08489425, 08555218,
            08621010, 08752339, 08818387, 08884180, 08949973, 09015765, 09147094, 09212886,
            09278679, 09344727, 09410520, 09541849, 09607641, 09673434, 09739226, 09870555,
            09936603, 10002396, 10068188, 10133981, 10265309, 10331102, 10397150, 10462943,
            10594272, 10660064, 10725857, 10791905, 10923234, 10989026, 11054819, 11120611,
            11251940, 11317988, 11383781, 11515109, 11580902, 11646694, 11712743, 11844071,
            11909864, 11975656, 12106985, 12173033, 12238826, 12304618, 12435947, 12501995,
            12567787, 12699116, 12764908, 12830701, 12962285, 13028078, 13093870, 13159663,
            13291247, 13357040, 13422832, 13554161, 13619953, 13686001, 13817330, 13883122,
            13948915, 14080499, 14146292, 14212084, 14343412, 14409461, 14475253, 14606582,
            14672374, 14738423, 14869751, 14935543, 15066872, 15132920, 15198713, 15330041,
            15396090, 15461882, 15593210, 15659003, 15725051, 15856380, 15922172, 16053500,
            16119549, 16185341, 16316670, 16382718, 16448510, 16579839, 16645631, 16777215,
        };

        #endregion

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

        #region RGB 구하기 - GetRGB(value)

        /// <summary>
        /// RGB 구하기
        /// </summary>
        /// <param name="value">값</param>
        /// <returns>RGB 튜플</returns>
        public (byte r, byte g, byte b) GetRGB(byte value)
        {
            byte[] byteArray = BitConverter.GetBytes(this.rgbArray[value]);

            return (byteArray[2], byteArray[1], byteArray[0]);
        }

        #endregion
    }
}

using System;

namespace TestLibrary

{

/// <summary>

/// 아르고 색상 맵

/// </summary>

public class ArgoColorMap : IColorMap

{

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

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

#region Field

/// <summary>

/// RGB 배열

/// </summary>

private readonly int[] rgbArray =

{

00000000, 00000004, 00000264, 00000267, 00000527, 00000530, 00000789, 00066328,

00066588, 00066591, 00066849, 00132388, 00132647, 00132650, 00132908, 00198447,

00198706, 00198708, 00264503, 00264505, 00330299, 00330557, 00330560, 00396354,

00396612, 00462150, 00462408, 00527946, 00528204, 00593998, 00594000, 00659794,

00660052, 00725590, 00791383, 00791641, 00857435, 00857437, 00923230, 00989024,

00989026, 01054819, 01120613, 01120870, 01186408, 01252201, 01252459, 01318252,

01384046, 01384047, 01449841, 01515634, 01515892, 01581429, 01647222, 01713016,

01713273, 01779066, 01844860, 01910397, 01976190, 01976447, 02042241, 02108034,

02173827, 02239364, 02239621, 02305415, 02371208, 02437001, 02502794, 02568587,

02568844, 02634381, 02700174, 02765968, 02831761, 02897554, 02963347, 03029140,

03029397, 03095190, 03160983, 03226520, 03292313, 03358106, 03423899, 03489692,

03555485, 03621278, 03687071, 03752864, 03818656, 03884449, 03950242, 04016035,

04081828, 04147621, 04147878, 04213671, 04279464, 04345256, 04411049, 04476842,

04542635, 04608428, 04739757, 04805550, 04871342, 04937135, 05002928, 05068721,

05134514, 05200306, 05266099, 05331892, 05397685, 05463477, 05529270, 05595063,

05660856, 05726648, 05792441, 05858234, 05924027, 05989819, 06121148, 06186941,

06252734, 06318526, 06384319, 06450112, 06515904, 06581953, 06647746, 06779074,

06844867, 06910660, 06976452, 07042245, 07108038, 07173830, 07239623, 07370952,

07436744, 07502793, 07568586, 07634378, 07700171, 07765964, 07897292, 07963085,

08028877, 08094670, 08160719, 08226511, 08357840, 08423632, 08489425, 08555218,

08621010, 08752339, 08818387, 08884180, 08949973, 09015765, 09147094, 09212886,

09278679, 09344727, 09410520, 09541849, 09607641, 09673434, 09739226, 09870555,

09936603, 10002396, 10068188, 10133981, 10265309, 10331102, 10397150, 10462943,

10594272, 10660064, 10725857, 10791905, 10923234, 10989026, 11054819, 11120611,

11251940, 11317988, 11383781, 11515109, 11580902, 11646694, 11712743, 11844071,

11909864, 11975656, 12106985, 12173033, 12238826, 12304618, 12435947, 12501995,

12567787, 12699116, 12764908, 12830701, 12962285, 13028078, 13093870, 13159663,

13291247, 13357040, 13422832, 13554161, 13619953, 13686001, 13817330, 13883122,

13948915, 14080499, 14146292, 14212084, 14343412, 14409461, 14475253, 14606582,

14672374, 14738423, 14869751, 14935543, 15066872, 15132920, 15198713, 15330041,

15396090, 15461882, 15593210, 15659003, 15725051, 15856380, 15922172, 16053500,

16119549, 16185341, 16316670, 16382718, 16448510, 16579839, 16645631, 16777215,

};

#endregion

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

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

#region RGB 구하기 - GetRGB(value)

/// <summary>

/// RGB 구하기

/// </summary>

/// <param name="value">값</param>

/// <returns>RGB 튜플</returns>

public (byte r, byte g, byte b) GetRGB(byte value)

{

byte[] byteArray = BitConverter.GetBytes(this.rgbArray[value]);

return (byteArray[2], byteArray[1], byteArray[0]);

}

#endregion

}

▶ BlueColorMap.cs


using System;

namespace TestLibrary
{
    /// <summary>
    /// 청색 색상 맵
    /// </summary>
    public class BlueColorMap : IColorMap
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// ARGB 배열
        /// </summary>
        private readonly int[] argbArray =
        {
            -16767403, -16767402, -16767144, -16766887, -16701093, -16700835, -16700578, -16634784,
            -16634527, -16634269, -16568476, -16568218, -16568216, -16567959, -16502165, -16501908,
            -16501650, -16435856, -16435599, -16435341, -16369548, -16369290, -16369033, -16303495,
            -16303238, -16302980, -16237186, -16236929, -16236671, -16236414, -16170620, -16170363,
            -16170105, -16104312, -16104054, -16103797, -16038259, -16038002, -16037745, -15971951,
            -15971694, -15971436, -15905643, -15905385, -15905128, -15839335, -15839077, -15838820,
            -15773027, -15772769, -15772512, -15706718, -15706717, -15706460, -15706203, -15640409,
            -15640152, -15574359, -15574101, -15573844, -15508051, -15507794, -15507537, -15441743,
            -15441486, -15441229, -15375436, -15375179, -15309386, -15309128, -15308871, -15243078,
            -15242821, -15177284, -15177027, -15111234, -15110977, -15045184, -15044927, -14979134,
            -14978877, -14913084, -14912827, -14847034, -14781241, -14780984, -14715191, -14715190,
            -14649397, -14583605, -14517812, -14517555, -14451762, -14385969, -14320176, -14319920,
            -14254383, -14188590, -14122797, -14057005, -13991212, -13925419, -13859626, -13859626,
            -13793833, -13662505, -13596712, -13530919, -13465383, -13399590, -13333797, -13268005,
            -13202212, -13136676, -13005347, -12939555, -12873762, -12808226, -12676897, -12611105,
            -12545312, -12414240, -12348447, -12282655, -12151327, -12085790, -12019998, -11888669,
            -11822877, -11757341, -11626012, -11560220, -11429148, -11363355, -11232027, -11166235,
            -11035162, -10969370, -10903578, -10772505, -10706713, -10575385, -10509592, -10378520,
            -10312728, -10181400, -10115863, -09984535, -09918743, -09787414, -09721878, -09590550,
            -09524758, -09393429, -09327893, -09262101, -09130773, -09065237, -08933908, -08868116,
            -08736788, -08671252, -08605459, -08474131, -08408339, -08277267, -08211475, -08145682,
            -08014354, -07948818, -07817490, -07751698, -07685905, -07554833, -07489041, -07357713,
            -07291921, -07226128, -07095056, -07029264, -06897936, -06832144, -06766351, -06635279,
            -06569487, -06503695, -06372367, -06306575, -06175502, -06109710, -06043918, -05912590,
            -05846798, -05781261, -05649933, -05584141, -05518349, -05387021, -05321485, -05190156,
            -05124364, -05058572, -04927244, -04861452, -04730123, -04664587, -04598795, -04467467,
            -04401675, -04335883, -04204554, -04139018, -04007690, -03941898, -03876106, -03744777,
            -03678985, -03547657, -03481865, -03416329, -03285000, -03219208, -03087880, -03022088,
            -02956296, -02824968, -02759175, -02628103, -02562311, -02430983, -02365191, -02299398,
            -02168070, -02102278, -01970950, -01905158, -01839621, -01708293, -01642501, -01511173,
            -01445381, -01314052, -01248260, -01182468, -01051140, -00985604, -00854275, -00788483,
            -00657155, -00591363, -00525571, -00394242, -00328450, -00197122, -00131330, -00000001,
        };

        #endregion

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

        #region RGB 구하기 - GetRGB(value)

        /// <summary>
        /// RGB 구하기
        /// </summary>
        /// <param name="value">값</param>
        /// <returns>RGB 튜플</returns>
        public (byte r, byte g, byte b) GetRGB(byte value)
        {
            byte[] byteArray = BitConverter.GetBytes(this.argbArray[value]);

            return (byteArray[2], byteArray[1], byteArray[0]);
        }

        #endregion
    }
}

using System;

namespace TestLibrary

{

/// <summary>

/// 청색 색상 맵

/// </summary>

public class BlueColorMap : IColorMap

{

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

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

#region Field

/// <summary>

/// ARGB 배열

/// </summary>

private readonly int[] argbArray =

{

-16767403, -16767402, -16767144, -16766887, -16701093, -16700835, -16700578, -16634784,

-16634527, -16634269, -16568476, -16568218, -16568216, -16567959, -16502165, -16501908,

-16501650, -16435856, -16435599, -16435341, -16369548, -16369290, -16369033, -16303495,

-16303238, -16302980, -16237186, -16236929, -16236671, -16236414, -16170620, -16170363,

-16170105, -16104312, -16104054, -16103797, -16038259, -16038002, -16037745, -15971951,

-15971694, -15971436, -15905643, -15905385, -15905128, -15839335, -15839077, -15838820,

-15773027, -15772769, -15772512, -15706718, -15706717, -15706460, -15706203, -15640409,

-15640152, -15574359, -15574101, -15573844, -15508051, -15507794, -15507537, -15441743,

-15441486, -15441229, -15375436, -15375179, -15309386, -15309128, -15308871, -15243078,

-15242821, -15177284, -15177027, -15111234, -15110977, -15045184, -15044927, -14979134,

-14978877, -14913084, -14912827, -14847034, -14781241, -14780984, -14715191, -14715190,

-14649397, -14583605, -14517812, -14517555, -14451762, -14385969, -14320176, -14319920,

-14254383, -14188590, -14122797, -14057005, -13991212, -13925419, -13859626, -13859626,

-13793833, -13662505, -13596712, -13530919, -13465383, -13399590, -13333797, -13268005,

-13202212, -13136676, -13005347, -12939555, -12873762, -12808226, -12676897, -12611105,

-12545312, -12414240, -12348447, -12282655, -12151327, -12085790, -12019998, -11888669,

-11822877, -11757341, -11626012, -11560220, -11429148, -11363355, -11232027, -11166235,

-11035162, -10969370, -10903578, -10772505, -10706713, -10575385, -10509592, -10378520,

-10312728, -10181400, -10115863, -09984535, -09918743, -09787414, -09721878, -09590550,

-09524758, -09393429, -09327893, -09262101, -09130773, -09065237, -08933908, -08868116,

-08736788, -08671252, -08605459, -08474131, -08408339, -08277267, -08211475, -08145682,

-08014354, -07948818, -07817490, -07751698, -07685905, -07554833, -07489041, -07357713,

-07291921, -07226128, -07095056, -07029264, -06897936, -06832144, -06766351, -06635279,

-06569487, -06503695, -06372367, -06306575, -06175502, -06109710, -06043918, -05912590,

-05846798, -05781261, -05649933, -05584141, -05518349, -05387021, -05321485, -05190156,

-05124364, -05058572, -04927244, -04861452, -04730123, -04664587, -04598795, -04467467,

-04401675, -04335883, -04204554, -04139018, -04007690, -03941898, -03876106, -03744777,

-03678985, -03547657, -03481865, -03416329, -03285000, -03219208, -03087880, -03022088,

-02956296, -02824968, -02759175, -02628103, -02562311, -02430983, -02365191, -02299398,

-02168070, -02102278, -01970950, -01905158, -01839621, -01708293, -01642501, -01511173,

-01445381, -01314052, -01248260, -01182468, -01051140, -00985604, -00854275, -00788483,

-00657155, -00591363, -00525571, -00394242, -00328450, -00197122, -00131330, -00000001,

};

#endregion

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

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

#region RGB 구하기 - GetRGB(value)

/// <summary>

/// RGB 구하기

/// </summary>

/// <param name="value">값</param>

/// <returns>RGB 튜플</returns>

public (byte r, byte g, byte b) GetRGB(byte value)

{

byte[] byteArray = BitConverter.GetBytes(this.argbArray[value]);

return (byteArray[2], byteArray[1], byteArray[0]);

}

#endregion

}

▶ GrayscaleColorMap.cs


namespace TestLibrary
{
    /// <summary>
    /// 회색조 색상 맵
    /// </summary>
    public class GrayscaleColorMap : IColorMap
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region RGB 구하기 - GetRGB(value)

        /// <summary>
        /// RGB 구하기
        /// </summary>
        /// <param name="value">값</param>
        /// <returns>RGB</returns>
        public (byte r, byte g, byte b) GetRGB(byte value)
        {
            return (value, value, value);
        }

        #endregion
    }
}

namespace TestLibrary

{

/// <summary>

/// 회색조 색상 맵

/// </summary>

public class GrayscaleColorMap : IColorMap

{

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

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

#region RGB 구하기 - GetRGB(value)

/// <summary>

/// RGB 구하기

/// </summary>

/// <param name="value">값</param>

/// <returns>RGB</returns>

public (byte r, byte g, byte b) GetRGB(byte value)

{

return (value, value, value);

}

#endregion

}

▶ GrayscaleReversedColorMap.cs


namespace TestLibrary
{
    /// <summary>
    /// 회색조 반전 색상 맵
    /// </summary>
    public class GrayscaleReversedColorMap : IColorMap
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region RGB 구하기 - GetRGB(value)

        /// <summary>
        /// RGB 구하기
        /// </summary>
        /// <param name="value">값</param>
        /// <returns>RGB</returns>
        public (byte r, byte g, byte b) GetRGB(byte value)
        {
            value = (byte)(255 - value);

            return (value, value, value);
        }

        #endregion
    }
}

namespace TestLibrary

{

/// <summary>

/// 회색조 반전 색상 맵

/// </summary>

public class GrayscaleReversedColorMap : IColorMap

{

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

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

#region RGB 구하기 - GetRGB(value)

/// <summary>

/// RGB 구하기

/// </summary>

/// <param name="value">값</param>

/// <returns>RGB</returns>

public (byte r, byte g, byte b) GetRGB(byte value)

{

value = (byte)(255 - value);

return (value, value, value);

}

#endregion

}

▶ GreenColorMap.cs


using System;

namespace TestLibrary
{
    /// <summary>
    /// 녹색 색상 맵
    /// </summary>
    public class GreenColorMap : IColorMap
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// ARGB 배열
        /// </summary>
        private readonly int[] argbArray =
        {
            -16761088, -16760832, -16760575, -16760318, -16760061, -16759804, -16759547, -16759290,
            -16759033, -16758776, -16758519, -16758006, -16757749, -16757492, -16757235, -16756979,
            -16756722, -16756465, -16756208, -16755951, -16755694, -16755437, -16755180, -16754667,
            -16754410, -16688617, -16688360, -16688104, -16687847, -16687590, -16687333, -16687076,
            -16621283, -16621026, -16620769, -16620512, -16620256, -16554463, -16554206, -16553949,
            -16553692, -16487899, -16487642, -16487385, -16421336, -16421080, -16420823, -16355030,
            -16354773, -16288980, -16288723, -16222930, -16222930, -16222673, -16156880, -16156623,
            -16090830, -16025038, -16024781, -15958988, -15958731, -15892938, -15827145, -15826889,
            -15761096, -15695303, -15695046, -15629254, -15563461, -15497924, -15497667, -15431875,
            -15366082, -15300289, -15234496, -15234240, -15168447, -15102654, -15037118, -14971325,
            -14905532, -14839740, -14773947, -14708154, -14642618, -14576825, -14511033, -14445240,
            -14379447, -14313655, -14248118, -14182326, -14116533, -14050741, -13985204, -13919412,
            -13853619, -13722291, -13656498, -13590962, -13525169, -13459377, -13328048, -13262512,
            -13196720, -13130927, -13065391, -12934063, -12868270, -12802478, -12671406, -12605613,
            -12539821, -12408749, -12342957, -12277164, -12146092, -12080300, -12014508, -11883435,
            -11817643, -11686315, -11620779, -11554986, -11423914, -11358122, -11226794, -11161258,
            -11029929, -10964137, -10833065, -10767273, -10636201, -10570408, -10439080, -10373544,
            -10242216, -10176680, -10045351, -09914023, -09848487, -09717159, -09651623, -09520294,
            -09389222, -09323430, -09192102, -09061029, -08995237, -08864165, -08798372, -08667300,
            -08535972, -08404643, -08339107, -08207779, -08076706, -08010914, -07879842, -07748513,
            -07682977, -07551648, -07420576, -07289248, -07223711, -07092383, -06961054, -06895518,
            -06764189, -06633116, -06501788, -06436251, -06304923, -06173850, -06108057, -05976984,
            -05845656, -05714583, -05648790, -05517717, -05386389, -05320596, -05189523, -05123730,
            -04992657, -04861328, -04795791, -04664462, -04598925, -04467596, -04336523, -04270730,
            -04139400, -04073863, -03942534, -03876997, -03745667, -03680130, -03614337, -03483007,
            -03417470, -03286140, -03220603, -03154809, -03023479, -02957942, -02892148, -02826610,
            -02760817, -02629487, -02563949, -02498155, -02432617, -02366823, -02301029, -02235491,
            -02169697, -02103903, -02038365, -01972571, -01906777, -01841239, -01775444, -01709650,
            -01644112, -01578318, -01512523, -01446985, -01381191, -01315396, -01249858, -01249599,
            -01183805, -01118266, -01052472, -00986678, -00986675, -00920880, -00855086, -00789547,
            -00723753, -00723494, -00657956, -00592161, -00526367, -00526108, -00460569, -00394775,
            -00394516, -00328977, -00263183, -00197388, -00197385, -00131591, -00065796, -00000001,

        };

        #endregion

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

        #region RGB 구하기 - GetRGB(value)

        /// <summary>
        /// RGB 구하기
        /// </summary>
        /// <param name="value">값</param>
        /// <returns>RGB</returns>
        public (byte r, byte g, byte b) GetRGB(byte value)
        {
            byte[] byteArray = BitConverter.GetBytes(this.argbArray[value]);

            return (byteArray[2], byteArray[1], byteArray[0]);
        }

        #endregion
    }
}

using System;

namespace TestLibrary

{

/// <summary>

/// 녹색 색상 맵

/// </summary>

public class GreenColorMap : IColorMap

{

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

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

#region Field

/// <summary>

/// ARGB 배열

/// </summary>

private readonly int[] argbArray =

{

-16761088, -16760832, -16760575, -16760318, -16760061, -16759804, -16759547, -16759290,

-16759033, -16758776, -16758519, -16758006, -16757749, -16757492, -16757235, -16756979,

-16756722, -16756465, -16756208, -16755951, -16755694, -16755437, -16755180, -16754667,

-16754410, -16688617, -16688360, -16688104, -16687847, -16687590, -16687333, -16687076,

-16621283, -16621026, -16620769, -16620512, -16620256, -16554463, -16554206, -16553949,

-16553692, -16487899, -16487642, -16487385, -16421336, -16421080, -16420823, -16355030,

-16354773, -16288980, -16288723, -16222930, -16222930, -16222673, -16156880, -16156623,

-16090830, -16025038, -16024781, -15958988, -15958731, -15892938, -15827145, -15826889,

-15761096, -15695303, -15695046, -15629254, -15563461, -15497924, -15497667, -15431875,

-15366082, -15300289, -15234496, -15234240, -15168447, -15102654, -15037118, -14971325,

-14905532, -14839740, -14773947, -14708154, -14642618, -14576825, -14511033, -14445240,

-14379447, -14313655, -14248118, -14182326, -14116533, -14050741, -13985204, -13919412,

-13853619, -13722291, -13656498, -13590962, -13525169, -13459377, -13328048, -13262512,

-13196720, -13130927, -13065391, -12934063, -12868270, -12802478, -12671406, -12605613,

-12539821, -12408749, -12342957, -12277164, -12146092, -12080300, -12014508, -11883435,

-11817643, -11686315, -11620779, -11554986, -11423914, -11358122, -11226794, -11161258,

-11029929, -10964137, -10833065, -10767273, -10636201, -10570408, -10439080, -10373544,

-10242216, -10176680, -10045351, -09914023, -09848487, -09717159, -09651623, -09520294,

-09389222, -09323430, -09192102, -09061029, -08995237, -08864165, -08798372, -08667300,

-08535972, -08404643, -08339107, -08207779, -08076706, -08010914, -07879842, -07748513,

-07682977, -07551648, -07420576, -07289248, -07223711, -07092383, -06961054, -06895518,

-06764189, -06633116, -06501788, -06436251, -06304923, -06173850, -06108057, -05976984,

-05845656, -05714583, -05648790, -05517717, -05386389, -05320596, -05189523, -05123730,

-04992657, -04861328, -04795791, -04664462, -04598925, -04467596, -04336523, -04270730,

-04139400, -04073863, -03942534, -03876997, -03745667, -03680130, -03614337, -03483007,

-03417470, -03286140, -03220603, -03154809, -03023479, -02957942, -02892148, -02826610,

-02760817, -02629487, -02563949, -02498155, -02432617, -02366823, -02301029, -02235491,

-02169697, -02103903, -02038365, -01972571, -01906777, -01841239, -01775444, -01709650,

-01644112, -01578318, -01512523, -01446985, -01381191, -01315396, -01249858, -01249599,

-01183805, -01118266, -01052472, -00986678, -00986675, -00920880, -00855086, -00789547,

-00723753, -00723494, -00657956, -00592161, -00526367, -00526108, -00460569, -00394775,

-00394516, -00328977, -00263183, -00197388, -00197385, -00131591, -00065796, -00000001,

};

#endregion

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

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

#region RGB 구하기 - GetRGB(value)

/// <summary>

/// RGB 구하기

/// </summary>

/// <param name="value">값</param>

/// <returns>RGB</returns>

public (byte r, byte g, byte b) GetRGB(byte value)

{

byte[] byteArray = BitConverter.GetBytes(this.argbArray[value]);

return (byteArray[2], byteArray[1], byteArray[0]);

}

#endregion

}

[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

}

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