Unity realizes recording and saves locally

using System;
using ;
using ;
using ;
using UnityEngine;

public class MicroPhoneManager : MonoBehaviour {

  public int DeviceLength;
  /// <summary>
  /// Recording frequency  /// </summary>
  public string Frequency = "44100";
  public int Samplerate = 44100;
  /// <summary>
  /// Recording time  /// </summary>
  public int MicSecond = 2;
  string infoLog = "";

  AudioSource _curAudioSource;

  AudioSource CurAudioSource
  {
    get
    {
      if (_curAudioSource == null)
      {
        _curAudioSource = <AudioSource>();
      }
      return _curAudioSource;
    }
  }

  #region ［public Way］

  /// <summary>
  /// Get the microphone device  /// </summary>
  public void GetMicrophoneDevice()
  {
    string[] mDevice = ;
    DeviceLength = ;
    if (DeviceLength == 0)
      ShowInfoLog("Microphone device not found!");
  }

  /// <summary>
  /// Start recording  /// </summary>
  public void StartRecordAudio()
  {
    ();
     = false;
     = true;
     = (null, true, MicSecond, (Frequency));
    while (!((null) > 0))
    {

    }
    ();
    ShowInfoLog("Start recording...");
  }

  /// <summary>
  /// Stop recording  /// </summary>
  public void StopRecordAudio()
  {
    ShowInfoLog("End recording...");
    if (!(null))
      return;
    (null);
    ();

  }
  /// <summary>s
  /// Playback recording  /// </summary>
  public void PlayRecordAudio()
  {
    if ((null))
      return;
    if ( == null)
      return;
     = false;
     = false;
    ();
    ShowInfoLog("Play the recording...");
  }

  /// <summary>
  /// Print recording information  /// </summary>
  public void PrintRecordData()
  {
    if ((null))
      return;
    byte[] data = GetClipData();
    #region Users can freely fix recording time    int position = (null);
    var soundata = new float[ * ];
    (soundata, 0);

    var newdata = new float[position * ];
    for (int i = 0; i < ; i++) {
      newdata[i] = soundata[i];
    }
     = (, position, , , false);
    (newdata, 0);

    (null);
    #endregion
    using (FileStream fs = CreateEmpty( + "/")) {
      ConvertAndWrite(fs, );
      WriteHeader(fs, );
    }

    string infoLog = "total length:" +  + " time:" + ;
    ShowInfoLog(infoLog);
  }
  private void WriteHeader(FileStream stream, AudioClip clip)
  {
    int hz = ;
    int channels = ;
    int samples = ;

    (0, );

    Byte[] riff = .("RIFF");
    (riff, 0, 4);

    Byte[] chunkSize = ( - 8);
    (chunkSize, 0, 4);

    Byte[] wave = .("WAVE");
    (wave, 0, 4);

    Byte[] fmt = .("fmt ");
    (fmt, 0, 4);

    Byte[] subChunk1 = (16);
    (subChunk1, 0, 4);

    UInt16 two = 2;
    UInt16 one = 1;

    Byte[] audioFormat = (one);
    (audioFormat, 0, 2);

    Byte[] numChannels = (channels);
    (numChannels, 0, 2);

    Byte[] sampleRate = (hz);
    (sampleRate, 0, 4);

    Byte[] byteRate = (hz * channels * 2); // sampleRate * bytesPerSample*number of channels, here 44100*2*2 
    (byteRate, 0, 4);

    UInt16 blockAlign = (ushort)(channels * 2);
    ((blockAlign), 0, 2);

    UInt16 bps = 16;
    Byte[] bitsPerSample = (bps);
    (bitsPerSample, 0, 2);

    Byte[] datastring = .("data");
    (datastring, 0, 4);

    Byte[] subChunk2 = (samples * channels * 2);
    (subChunk2, 0, 4);

  }
  private FileStream CreateEmpty(string filepath)
  {
    FileStream fileStream = new FileStream(filepath, );
    byte emptyByte = new byte();

    for (int i = 0; i < 44; i++) //preparing the header 
    {
      (emptyByte);
    }

    return fileStream;
  }
  private void ConvertAndWrite(FileStream fileStream, AudioClip clip)
  {

    float[] samples = new float[];

    (samples, 0);

    Int16[] intData = new Int16[];

    Byte[] bytesData = new Byte[ * 2];

    int rescaleFactor = 32767; //to convert float to Int16 

    for (int i = 0; i < ; i++)
    {
      intData[i] = (short)(samples[i] * rescaleFactor);
      Byte[] byteArr = new Byte[2];
      byteArr = (intData[i]);
      (bytesData, i * 2);
    }
    (bytesData, 0, );
  }
  /// <summary>
  /// Get audio data  /// </summary>
  /// <returns>The clip data.</returns>
  public byte[] GetClipData()
  {
    if ( == null)
    {
      ShowInfoLog("Missing audio resources!");
      return null;
    }

    float[] samples = new float[];
    (samples, 0);

    byte[] outData = new byte[ * 2];
    int reScaleFactor = 32767;

    for (int i = 0; i < ; i++)
    {
      short tempShort = (short)(samples[i] * reScaleFactor);
      byte[] tempData = (tempShort);

      outData[i * 2] = tempData[0];
      outData[i * 2 + 1] = tempData[1];
    }
    if (outData == null ||  <= 0)
    {

      ShowInfoLog("Failed to obtain audio data!");
      return null;
    }
    return outData;
  }

  #endregion


  void OnGUI()
  {

    if (DeviceLength == 0)
    {
      if (ShowGUIButton("Get microphone device"))
      {
        GetMicrophoneDevice();
      }
    }
    else if (DeviceLength > 0)
    {
      ("Recording frequency:");
      Frequency = (Frequency, ( / 5), ( / 20));
      ();

      if (ShowGUIButton("Start recording"))
      {
        StartRecordAudio();
      }
      if (ShowGUIButton("End recording"))
      {
        StopRecordAudio();
      }
      if (ShowGUIButton("Replay Recording"))
      {
        PlayRecordAudio();
      }
      if (ShowGUIButton("Get recording data"))
      {
        PrintRecordData();
      }

      ();
    }
    (infoLog);

  }

  #region [Private Way]

  /// <summary>
  /// Show GUI button  /// </summary>
  /// <returns><c>true</c>, if GUI button was shown, <c>false</c> otherwise.</returns>
  /// <param name="buttonName">Button name.</param>
  bool ShowGUIButton(string buttonName)
  {
    return (buttonName, ( / 20), ( / 5));
  }

  void ShowInfoLog(string info)
  {
    infoLog += info;
    infoLog += "\r\n";
  }

  #endregion
}