Unity Microphone 录音时 检测声音大小

 1 public float Volume
 2 {
 3     get
 4     {
 5         if (Microphone.IsRecording(null))
 6         {
 7             // 采样数
 8             int sampleSize = 128;
 9             float[] samples = new float[sampleSize];
10             int startPosition = Microphone.GetPosition(null) - (sampleSize+1);
11             // 得到数据
12             this.audio.clip.GetData(samples, startPosition);
13 
14             // Getting a peak on the last 128 samples
15             float levelMax = 0;
16             for (int i = 0; i < sampleSize; ++i)
17             {
18                 float wavePeak = samples[i];
19                 if (levelMax < wavePeak)
20                     levelMax = wavePeak;
21             }
22 
23             return levelMax * 99;
24         }
25         return 0;
26     }
27 }