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 = ;
/// <summary>
/// 录音时长
/// </summary>
public int MicSecond = ;
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 == )
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) > ))
{
}
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, );
var newdata = new float[position * CurAudioSource.clip.channels];
for (int i = ; 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, );
Microphone.End(null);
#endregion
using (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(, SeekOrigin.Begin);
Byte[] riff = System.Text.Encoding.UTF8.GetBytes("RIFF");
stream.Write(riff, , );
Byte[] chunkSize = BitConverter.GetBytes(stream.Length - );
stream.Write(chunkSize, , );
Byte[] wave = System.Text.Encoding.UTF8.GetBytes("WAVE");
stream.Write(wave, , );
Byte[] fmt = System.Text.Encoding.UTF8.GetBytes("fmt ");
stream.Write(fmt, , );
Byte[] subChunk1 = BitConverter.GetBytes();
stream.Write(subChunk1, , );
UInt16 two = ;
UInt16 one = ;
Byte[] audioFormat = BitConverter.GetBytes(one);
stream.Write(audioFormat, , );
Byte[] numChannels = BitConverter.GetBytes(channels);
stream.Write(numChannels, , );
Byte[] sampleRate = BitConverter.GetBytes(hz);
stream.Write(sampleRate, , );
Byte[] byteRate = BitConverter.GetBytes(hz * channels * ); // sampleRate * bytesPerSample*number of channels, here 44100*2*2
stream.Write(byteRate, , );
UInt16 blockAlign = (ushort)(channels * );
stream.Write(BitConverter.GetBytes(blockAlign), , );
UInt16 bps = ;
Byte[] bitsPerSample = BitConverter.GetBytes(bps);
stream.Write(bitsPerSample, , );
Byte[] datastring = System.Text.Encoding.UTF8.GetBytes("data");
stream.Write(datastring, , );
Byte[] subChunk2 = BitConverter.GetBytes(samples * channels * );
stream.Write(subChunk2, , );
}
private FileStream CreateEmpty(string filepath)
{
FileStream fileStream = new FileStream(filepath, FileMode.Create);
byte emptyByte = new byte();
for (int i = ; i < ; 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, );
Int16[] intData = new Int16[samples.Length];
Byte[] bytesData = new Byte[samples.Length * ];
int rescaleFactor = ; //to convert float to Int16
for (int i = ; i < samples.Length; i++)
{
intData[i] = (short)(samples[i] * rescaleFactor);
Byte[] byteArr = new Byte[];
byteArr = BitConverter.GetBytes(intData[i]);
byteArr.CopyTo(bytesData, i * );
}
fileStream.Write(bytesData, , 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, );
byte[] outData = new byte[samples.Length * ];
int reScaleFactor = ;
for (int i = ; i < samples.Length; i++)
{
short tempShort = (short)(samples[i] * reScaleFactor);
byte[] tempData = System.BitConverter.GetBytes(tempShort);
outData[i * ] = tempData[];
outData[i * + ] = tempData[];
}
if (outData == null || outData.Length <= )
{
ShowInfoLog("获取音频数据失败!");
return null;
}
return outData;
}
#endregion
void OnGUI()
{
if (DeviceLength == )
{
if (ShowGUIButton("获取麦克风设备"))
{
GetMicrophoneDevice();
}
}
else if (DeviceLength > )
{
GUILayout.Label("录音频率:");
Frequency = GUILayout.TextField(Frequency, GUILayout.Width(Screen.width / ), GUILayout.Height(Screen.height / ));
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 / ), GUILayout.Width(Screen.width / ));
}
void ShowInfoLog(string info)
{
infoLog += info;
infoLog += "\r\n";
}
#endregion
}