unity 录音并保存本地

我们可以使用unity自带的MicroPhone类来录音，回放录音，保存录音
具体代码如下：

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using UnityEngine;public class MicroPhoneManager : MonoBehaviour {public int DeviceLength;/// <summary>/// 录音频率/// </summary>public string Frequency = "44100";public int Samplerate = 44100;/// <summary>/// 录音时长/// </summary>public int MicSecond = 2;string infoLog = "";AudioSource _curAudioSource;AudioSource CurAudioSource{get{if (_curAudioSource == null){_curAudioSource = gameObject.AddComponent<AudioSource>();}return _curAudioSource;}}#region ［public Way］/// <summary>/// 获取麦克风设备/// </summary>public void GetMicrophoneDevice(){string[] mDevice = Microphone.devices;DeviceLength = mDevice.Length;if (DeviceLength == 0)ShowInfoLog("找不到麦克风设备！");}/// <summary>/// 开始录音/// </summary>public void StartRecordAudio(){CurAudioSource.Stop();CurAudioSource.loop = false;CurAudioSource.mute = true;CurAudioSource.clip = Microphone.Start(null, true, MicSecond, int.Parse(Frequency));while (!(Microphone.GetPosition(null) > 0)){}CurAudioSource.Play();ShowInfoLog("开始录音.....");}/// <summary>/// 停止录音/// </summary>public void StopRecordAudio(){ShowInfoLog("结束录音.....");if (!Microphone.IsRecording(null))return;Microphone.End(null);CurAudioSource.Stop();}/// <summary>s/// 回放录音/// </summary>public void PlayRecordAudio(){if (Microphone.IsRecording(null))return;if (CurAudioSource.clip == null)return;CurAudioSource.mute = false;CurAudioSource.loop = false;CurAudioSource.Play();ShowInfoLog("播放录音.....");}/// <summary>///  打印录音信息/// </summary>public void PrintRecordData(){if (Microphone.IsRecording(null))return;byte[] data = GetClipData();#region 用户自由固定录音时长int position = Microphone.GetPosition(null);var soundata = new float[CurAudioSource.clip.samples * CurAudioSource.clip.channels];CurAudioSource.clip.GetData(soundata, 0);var newdata = new float[position * CurAudioSource.clip.channels];for (int i = 0; i < newdata.Length; i++) {newdata[i] = soundata[i];}CurAudioSource.clip = AudioClip.Create(CurAudioSource.clip.name, position, CurAudioSource.clip.channels, CurAudioSource.clip.frequency, false);CurAudioSource.clip.SetData(newdata, 0);Microphone.End(null);#endregionusing (FileStream fs = CreateEmpty(Application.persistentDataPath + "/dd.wav")) {ConvertAndWrite(fs, CurAudioSource.clip);WriteHeader(fs, CurAudioSource.clip);}string infoLog = "total length:" + data.Length + " time:" + CurAudioSource.time;ShowInfoLog(infoLog);}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);}private FileStream CreateEmpty(string filepath){FileStream fileStream = new FileStream(filepath, FileMode.Create);byte emptyByte = new byte();for (int i = 0; i < 44; i++) //preparing the header  {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);}/// <summary>/// 获取音频数据/// </summary>/// <returns>The clip data.</returns>public byte[] GetClipData(){if (CurAudioSource.clip == null){ShowInfoLog("缺少音频资源！");return null;}float[] samples = new float[CurAudioSource.clip.samples];CurAudioSource.clip.GetData(samples, 0);byte[] outData = new byte[samples.Length * 2];int reScaleFactor = 32767;for (int i = 0; i < samples.Length; i++){short tempShort = (short)(samples[i] * reScaleFactor);byte[] tempData = System.BitConverter.GetBytes(tempShort);outData[i * 2] = tempData[0];outData[i * 2 + 1] = tempData[1];}if (outData == null || outData.Length <= 0){ShowInfoLog("获取音频数据失败！");return null;}return outData;}#endregionvoid OnGUI(){if (DeviceLength == 0){if (ShowGUIButton("获取麦克风设备")){GetMicrophoneDevice();}}else if (DeviceLength > 0){GUILayout.Label("录音频率:");Frequency = GUILayout.TextField(Frequency, GUILayout.Width(Screen.width / 5), GUILayout.Height(Screen.height / 20));GUILayout.BeginVertical();if (ShowGUIButton("开始录音")){StartRecordAudio();}if (ShowGUIButton("结束录音")){StopRecordAudio();}if (ShowGUIButton("回放录音")){PlayRecordAudio();}if (ShowGUIButton("获取录音数据")){PrintRecordData();}GUILayout.EndVertical();}GUILayout.Label(infoLog);}#region [Private Way]/// <summary>/// 显示GUI 按钮/// </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 GUILayout.Button(buttonName, GUILayout.Height(Screen.height / 20), GUILayout.Width(Screen.width / 5));}void ShowInfoLog(string info){infoLog += info;infoLog += "\r\n";}#endregion
}

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