内容简介：Unity3D 实现录音小案例
我们都知道，在Unity中有提供麦克风MicroPhone相关的API，今天小编和大家一起来看一下如何实现录制场景中的声音，并且可以在应用中使用。
1.首先，一起回顾一下快速在游戏中创建音频剪辑，官方文档：https://docs.unity3d.com/ScriptReference/AudioClip.Create.html
1.0 第一步，新建项目并且在场景附加一个TestAudio.cs 组件类；
TestAudio.cs 代码如下：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class TestAudio : MonoBehaviour {
public string Frequency="440";
public int Samplerate = 44100;
public int Position = 0;
void OnGUI()
{
if (GUI.Button (new Rect (10, 10, 100, 100), "创建音频剪辑"))
CreateAudioSource ();
GUI.Label (new Rect (10, 200, 100, 100),"Position:"+Position.ToString());
}
void CreateAudioSource()
{
AudioClip myClip = AudioClip.Create("MyFirstSound", Samplerate * 2, 1, Samplerate, true, OnAudioRead, OnAudioSetPosition);
AudioSource aud = GetComponent();
aud.clip = myClip;
aud.Play();
}
void OnAudioRead(float[] data)
{
int count = 0;
while (count < data.Length)
{
data[count] = Mathf.Sign(Mathf.Sin(2 * Mathf.PI * int.Parse(Frequency) * Position / Samplerate));
Position++;
count++;
}
}
void OnAudioSetPosition(int newPosition)
{
Position = newPosition;
}
}
1.1 第二步，直接运行看结果；
2. 然后，一起学习如何在Unity中调用MicroPhone相关的接口，官方文档：https://docs.unity3d.com/ScriptReference/30_search.html?q=Microphone.IsRecording
2.0 第一步，新建项目并且在场景中附加一个MicroPhoneManager.cs 组件类；
MicroPhoneManager.cs 代码如下：
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class MicroPhoneManager : MonoBehaviour {
public int DeviceLength;
public string Frequency="440";
public int Samplerate = 44100;
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 ();
}
/// /// 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 ();
string infoLog = "total length:" + data.Length + " time:" + CurAudioSource.time;
ShowInfoLog (infoLog);
}
/// /// 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)
{
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. /// Button name. 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
}
}
2.1 第二步，我们可以部署到android／iphone真机上运行，当然也可以直接在PC端运行查看结果；
以上就是本文的全部内容，希望本文的内容对大家的学习或者工作能带来一定的帮助，也希望大家多多支持 码农网
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