unity c# 录音并保存为 mp3 或 wav 文件

 private int Frequency = 16000; //录音频率     private int BitRate = 16; //比特率     private int MicSecond = 2;  //每隔2秒，保存一下录音数据     public Button bStart;     public Button bStop;     public Button bPlay;         public Text tTip;     public AudioSource au;

    void Start () {         bStart.onClick.AddListener(OnStartClick);         bStop.onClick.AddListener(OnStopClick);         bPlay.onClick.AddListener(OnPlayClick);     }

    void OnStartClick()     {         tTip.text += "\n开始录音....";         au.Stop();         au.loop = false;         au.mute = true;         au.clip = Microphone.Start(null, true, MicSecond, Frequency);     }

    void OnStopClick()     {         tTip.text += "\n停止录音!";

        if (!Microphone.IsRecording(null))             return;         Microphone.End(null);         au.Stop();         Mp3FromClip("d:/test.mp3", au.clip); //将录音保存为mp3         //WavFromClip("d:/test.wav", au.clip); //将录音保存为wav     }

    void OnPlayClick()     {         if (Microphone.IsRecording(null))             return;         if (au.clip == null)             return;         au.mute = false;         au.loop = false;         au.Play();         tTip.text += "\n播放录音....";     }

   public void WavFromClip(string WavPosition, AudioClip clip)     {         if (Microphone.IsRecording(null))             return;         Microphone.End(null);

        using (FileStream fs = CreateEmpty(WavPosition))         {             ConvertAndWrite(fs, au.clip);             WriteHeader(fs, au.clip); //wav文件头         }     }

    private FileStream CreateEmpty(string filepath)     {         FileStream fileStream = new FileStream(filepath, FileMode.Create);         byte emptyByte = new byte();

        for (int i = 0; i < 44; i++) //为wav文件头留出空间         {             fileStream.WriteByte(emptyByte);         }

        return fileStream;     }

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

    public void Mp3FromClip(string Mp3location, AudioClip clip)     {         var samples = new float[clip.samples * clip.channels];         clip.GetData(samples, 0);

        Int16[] intData = new Int16[samples.Length];         //converting in 2 float[] steps to Int16[], //then Int16[] to Byte[]

        Byte[] bytesData = new Byte[samples.Length * 2];         //bytesData array is twice the size of         //dataSource array because a float converted in Int16 is 2 bytes.

        float 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);         }

        var ms = new MemoryStream(bytesData);

        using (var writer = new LameMP3FileWriter(Mp3location, new WaveFormat(Frequency, BitRate, 1), LAMEPreset.ABR_16))             ms.CopyTo(writer);            }

    private void WriteHeader(FileStream stream, AudioClip clip)     {         int hz = clip.frequency;         int channels = clip.channels;         int samples = clip.samples;

        stream.Seek(0, SeekOrigin.Begin);

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

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

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

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

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

        UInt16 two = 2;         UInt16 one = 1;

        Byte[] audioFormat = BitConverter.GetBytes(one);         stream.Write(audioFormat, 0, 2);

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

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

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

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

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

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

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

    }