C# save wav

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;
using System;

public class SaveWav  {

    const int HEADER_SIZE = 44;

    public static void Save(string fileName,AudioClip clip)
    {
        if (!fileName.ToLower().EndsWith(".wav"))
        {
            fileName += ".wav";
        }


        //1.创建头
        FileStream fs = CreateEmpty(@"C: \Users\Aidenxl\Desktop"+"\\"+fileName);

        //2.写语音数据
        ConvertAndWrite(fs,clip);

        //3.重写真正的文件头
        WriteHeader(fs,clip);


    }

    //创建头文件
    static FileStream CreateEmpty(string filepath)
    {
        var fileStream = new FileStream(filepath,FileMode.Create);

        byte emptyByte = new byte();

        for (int i = 0; i < HEADER_SIZE; i++)
        {
            fileStream.WriteByte(emptyByte);
        }

        return fileStream;
    }

    static void ConvertAndWrite(FileStream fileStream,AudioClip clip)
    {
        var samples = new float[clip.samples];

        clip.GetData(samples,0);

        Int16[] intData = new Int16[samples.Length];

        Byte[] bytesData = new Byte[samples.Length * 2];

        int rescaleFactor = 32767;

        for (int i = 0; i < samples.Length; i++)
        {
            intData[i] = (short)(samples[i] * rescaleFactor);
            Byte[] byteArray = new byte[2];
            byteArray = BitConverter.GetBytes(intData[i]);
            byteArray.CopyTo(bytesData,i*2);


        }

        fileStream.Write(bytesData, 0, bytesData.Length);

    }


    static void WriteHeader(FileStream fileStream,AudioClip clip)
    {
        var hz = clip.frequency;
        var channels = clip.channels;
        var samples = clip.samples;

        fileStream.Seek(0,SeekOrigin.Begin);

        Byte[] riff = System.Text.Encoding.UTF8.GetBytes("RIFF");
        fileStream.Write(riff,0,4);

        Byte[] chunkSize = BitConverter.GetBytes(fileStream.Length-8);
        fileStream.Write(chunkSize,0,4);

        Byte[] wave = System.Text.Encoding.UTF8.GetBytes("WAVE");
        fileStream.Write(wave,0,4);

        Byte[] fmt = System.Text.Encoding.UTF8.GetBytes("fmt ");
        fileStream.Write(fmt, 0,4);

        Byte[] subChunk1 = BitConverter.GetBytes(16);
        fileStream.Write(subChunk1,0,4);

        Byte[] audioFormat = BitConverter.GetBytes(1);
        fileStream.Write(audioFormat,0,2);
         
        Byte[] numChannels = BitConverter.GetBytes(channels);
        fileStream.Write(numChannels, 0,2);

        Byte[] sampleRate = BitConverter.GetBytes(hz);
        fileStream.Write(sampleRate, 0, 4);

        Byte[] byRate = BitConverter.GetBytes(hz*channels*2);
        fileStream.Write(byRate, 0, 4);



        UInt16 blockAlign = (ushort)(channels * 2);
        fileStream.Write(BitConverter.GetBytes(blockAlign),0,2);

        UInt16 bps = 16;
        byte[] bitsPerSample = BitConverter.GetBytes(bps);
        fileStream.Write(bitsPerSample,0,2);

        Byte[] dataString = System.Text.Encoding.UTF8.GetBytes("data");
        fileStream.Write(dataString, 0,4);


        Byte[] subChunk2 = BitConverter.GetBytes(samples*channels*2);
        fileStream.Write(subChunk2, 0, 4);


        fileStream.Close();


    }

}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Micphone : MonoBehaviour {

    bool micConnected = false;
    int minFreq, maxFreq;

    AudioSource goAudioSource;

	// Use this for initialization
	void Start () {

        if (Microphone.devices.Length <= 0)
        {
            Debug.LogWarning("该机器上没有麦克风");

        }else
        {
            micConnected = true;

            Microphone.GetDeviceCaps(null, out minFreq, out maxFreq);
            if (minFreq == 0 && maxFreq == 0)
            {
                maxFreq = 44100;
            }

            goAudioSource = GetComponent<AudioSource>();

        }


	}
	
	// Update is called once per frame
	void Update () {
		
	}

    private void OnGUI()
    {

        if (!micConnected) return;

        if (!Microphone.IsRecording(null))
        {
            if (GUI.Button(new Rect(Screen.width / 2 - 100, Screen.height / 2 - 25, 200, 50), "Record"))
            {
                AudioClip ss = Microphone.Start(null, true, 20, maxFreq);
                goAudioSource.clip = ss;
            }

        }else
        {
            if(GUI.Button(new Rect(Screen.width / 2 - 100, Screen.height / 2 - 25, 200, 50), "Stop and play"))
            {
                Microphone.End(null);

                SaveWav.Save("text.wav",goAudioSource.clip);

                goAudioSource.Play();

            }
            GUI.Label(new Rect(Screen.width/2-100,Screen.height/2+25,200,50),"Micophone is using... ");

        }





    }


}