U3D录音以及保存为wav格式文件

Hello,我是KitStar

还是直接上代码：试着去理解会学到更多。代码完全正确，经过多次测试。

using UnityEngine;using System.IO;using System;using UnityEngine.UI;[RequireComponent(typeof(AudioSource))]public class RecordingWav : MonoBehaviour {    public Image imageButton;    string filePath = null;     private AudioSource m_audioSource;    private AudioClip m_audioClip;    public const int SamplingRate = 8000;    private const int HEADER_SIZE = 44;    public bool isRecording = false;    public Byte[] speech_Byte;    // Use this for initialization    void Start () {        m_audioSource = GetComponent<AudioSource>();        filePath = Application.dataPath + "/StreamingAssets/";    }// Update is called once per framevoid Update () {}    public void StartRecording()    {        isRecording = !isRecording;        if (isRecording)        {            Microphone.End(null);            foreach (string d in Microphone.devices)            {               Debug.Log("Devid :" + d);            }            m_audioClip = Microphone.Start(null, false, 60, SamplingRate);            imageButton.color = Color.red;        }        else        {            imageButton.color = Color.blue;            int audioLength = 0;            int lastPos = Microphone.GetPosition(null);            if (Microphone.IsRecording(null))            {                audioLength = lastPos / SamplingRate;            }            else            {                audioLength = 1;                Debug.Log("error : 录音时间太短");            }            Microphone.End(null);            if (audioLength <= 1.0f) return;            bool Res = SaveWav("Microphone", m_audioClip);        }    }    public void PlayAudioClip()    {        if(m_audioClip.length > 5 && m_audioClip != null)        {            if(m_audioSource.isPlaying)            {                m_audioSource.Stop();            }            Debug.Log("Channel :" + m_audioClip.channels + " ;Samle :" + m_audioClip.samples + " ;frequency :" + m_audioClip.frequency + " ;length :" + m_audioClip.length);            m_audioSource.clip = m_audioClip;            m_audioSource.Play();        }    }    bool SaveWav(string filename, AudioClip clip)    {        try        {            if (!filename.ToLower().EndsWith(".wav"))            {                filename += ".wav";            }            filePath = filePath + filename;            Debug.Log("Record Ok :" + filePath);            Directory.CreateDirectory(Path.GetDirectoryName(filePath));            using (FileStream fileStream = CreateEmpty(filePath))            {                ConvertAndWrite(fileStream, clip);                           }            return true;        }        catch(Exception ex)        {            Debug.Log("error : " + ex);            return false;        }               }    FileStream CreateEmpty(string filePath)    {        FileStream fileStream = new FileStream(filePath,FileMode.Create);        byte emptyByte = new byte();        for(int i = 0; i < HEADER_SIZE; i++)        {            fileStream.WriteByte(emptyByte);        }        return fileStream;    }    void ConvertAndWrite(FileStream fileStream, AudioClip clip)    {        float[] 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; //to convert float to Int16        for(int i = 0; i < samples.Length; i++)        {            intData[i] = (short)(samples[i] * rescaleFactor);            Byte[] byteArr = new Byte[2];            byteArr = BitConverter.GetBytes(intData[i]);            byteArr.CopyTo(bytesData, i * 2);        }        speech_Byte = bytesData;        fileStream.Write(bytesData, 0, bytesData.Length);        WriteHeader(fileStream, clip);    }    void WriteHeader(FileStream fileStream, AudioClip clip)    {        int hz = clip.frequency;        int channels = clip.channels;        int 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);        UInt16 two = 2;        UInt16 one = 1;        Byte[] audioFormat = BitConverter.GetBytes(one);        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[] byteRate = BitConverter.GetBytes(hz * channels * 2); // sampleRate * bytesPerSample*number of channels, here 44100*2*2          fileStream.Write(byteRate, 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 * 2 * channels);        fileStream.Write(subChunk2, 0, 4);              fileStream.Close();        Debug.Log(" OK ");    } }