unity如何实现录音并保存本地
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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;
///
/// 录音频率
///
public string Frequency = "44100";
public int Samplerate = 44100;
///
/// 录音时长
///
public int MicSecond = 2;
string infoLog = "";
AudioSource _curAudioSource;
AudioSource CurAudioSource
{
get
{
if (_curAudioSource == null)
{
_curAudioSource = gameObject.AddComponent();
}
return _curAudioSource;
}
}
#region ［public Way］
///
/// 获取麦克风设备
///
public void GetMicrophoneDevice()
{
string[] mDevice = Microphone.devices;
DeviceLength = mDevice.Length;
if (DeviceLength == 0)
ShowInfoLog("找不到麦克风设备！");
}
///
/// 开始录音
///
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.....");
}
///
/// 停止录音
///
public void StopRecordAudio()
{
ShowInfoLog("结束录音.....");
if (!Microphone.IsRecording(null))
return;
Microphone.End(null);
CurAudioSource.Stop();
}
/// s
/// 回放录音
///
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.....");
}
///
/// 打印录音信息
///
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);
#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(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);
}
///
/// 获取音频数据
///
/// The clip data.
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;
}
#endregion
void 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]
///
/// 显示GUI 按钮
///
/// true , if GUI button was shown, false otherwise. 以上就是关于unity如何实现录音并保存本地的内容，如果你们有学习到知识或者技能，可以把它分享出去让更多的人看到。
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