unity3D实现录音功能，并将真实录音时长保存至本地（不能用可私信，附可执行文件下载地址） / 四六文摘

项目实现功能：在unity3D中通过Microphone的API实现录音功能，并将真正时长的录音文件以”.wav“格式保存到本地。
环境：Win10 unity版本：2018.2.15f1 VS版本：2017
界面展示
说明：要提前了解.wav文件的格式
根据.wav文件格式，需要对录音的声音流进行重新编码。
代码

using UnityEngine;
using UnityEngine.UI;
using System;
using System.IO;
public class TestMicro : MonoBehaviour {
private bool micConnected = false;//麦克风是否连接
private int minFreq, maxFreq;//最小和最大频率
public AudioClip RecordedClip;//录音
public AudioSource audioSource;//播放的音频
public Text Infotxt;//提示信息
public Text Adress;//音频保存地址
private string fileName;//保存的文件名
private byte[] data;
private void Start()
{
if (Microphone.devices.Length <= 0)
{
Infotxt.text = "缺少麦克风设备！";
}
else
{
Infotxt.text = "设备名称为："+Microphone.devices[0].ToString()+"请点击Start开始录音！";
micConnected = true;
Microphone.GetDeviceCaps(null, out minFreq, out maxFreq);
if (minFreq == 0 && maxFreq == 0)
{
maxFreq = 44100;
}
}
}
/// <summary>
/// 开始录音
/// </summary>
public void Begin()
{
if (micConnected)
{
if (!Microphone.IsRecording(null))
{
RecordedClip = Microphone.Start(null, false, 60, maxFreq);
Infotxt.text = "开始录音！";
}
else
{
Infotxt.text = "正在录音中，请勿重复点击Start！";
}
}
else
{
Infotxt.text = "请确认麦克风设备是否已连接！";
}
}
/// <summary>
/// 停止录音
/// </summary>
public void Stop()
{
data = GetRealAudio(ref RecordedClip);
Microphone.End(null);
Infotxt.text = "录音结束！";
}
/// <summary>
/// 播放录音
/// </summary>
public void Player()
{
if (!Microphone.IsRecording(null))
{
audioSource.clip = RecordedClip;
audioSource.Play();
Infotxt.text = "正在播放录音！";
}
else
{
Infotxt.text = "正在录音中，请先停止录音！";
}
}
/// <summary>
/// 保存录音
/// </summary>
public void Save()
{
if (!Microphone.IsRecording(null))
{
fileName = DateTime.Now.ToString("yyyyMMddHHmmssffff");
if (!fileName.ToLower().EndsWith(".wav"))
{//如果不是“.wav”格式的，加上后缀
fileName += ".wav";
}
string path= Path.Combine(Application.persistentDataPath, fileName);//录音保存路径
print(path);//输出路径
Adress.text = path;
using (FileStream fs = CreateEmpty(path))
{
fs.Write(data, 0, data.Length);
WriteHeader(fs, RecordedClip); //wav文件头
}
}
else
{
Infotxt.text = "正在录音中，请先停止录音！";
}
}
/// <summary>
/// 获取真正大小的录音
/// </summary>
/// <param name="recordedClip"></param>
/// <returns></returns>
public static byte[] GetRealAudio(ref AudioClip recordedClip)
{
int position = Microphone.GetPosition(null);
if (position <= 0 || position > recordedClip.samples)
{
position = recordedClip.samples;
}
float[] soundata = new float[position * recordedClip.channels];
recordedClip.GetData(soundata, 0);
recordedClip = AudioClip.Create(recordedClip.name, position,
recordedClip.channels, recordedClip.frequency, false);
recordedClip.SetData(soundata, 0);
int rescaleFactor = 32767;
byte[] outData = new byte[soundata.Length * 2];
for (int i = 0; i < soundata.Length; i++)
{
short temshort = (short)(soundata[i] * rescaleFactor);
byte[] temdata = BitConverter.GetBytes(temshort);
outData[i * 2] = temdata[0];
outData[i * 2 + 1] = temdata[1];
}
Debug.Log("position=" + position + " outData.leng=" + outData.Length);
return outData;
}
/// <summary>
/// 写文件头
/// </summary>
/// <param name="stream"></param>
/// <param name="clip"></param>
public static 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 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);
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);
}
/// <summary>
/// 创建wav格式文件头
/// </summary>
/// <param name="filepath"></param>
/// <returns></returns>
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;
}
}

可执行文件（有个bug目前还没修改，不过不影响使用）：

bug：当没有录音的时候，点击save也会出现保存文件的地址，可以在Save（）方法中判断一下if（recordedclip！=null）

可执行文件下载地址：https://download.csdn.net/download/qq_40878840/12942233

unity3D实现录音功能，并将真实录音时长保存至本地（不能用可私信，附可执行文件下载地址）

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