Multiple improvments

AudioProcessing/AudioBeatDetector.cs

@@ -6,7 +6,7 @@ using System.Linq;
 
 namespace BeatDetector.AudioProcessing;
 
-internal class AudioBeatDetector
+internal class AudioBeatDetector : IDisposable
 {
     public event EventHandler<BeatDetectorEventArgs>? OnBeat;
 
@@ -20,8 +20,9 @@ internal class AudioBeatDetector
     private readonly int chunkCount;
     private readonly BeatChunk[] beatChunks;
 
-    public AudioBeatDetector(TimeSpan beatDetectionDelay, int fftLength, int chunkCount)
+    public AudioBeatDetector(IWaveIn waveIn, TimeSpan beatDetectionDelay, int fftLength, int chunkCount)
     {
+        this.waveIn = waveIn;
         this.beatDetectionDelay = beatDetectionDelay;
         this.chunkCount = chunkCount;
         this.fftLength = fftLength;
@@ -38,10 +39,12 @@ internal class AudioBeatDetector
         sampleAggregator.FftCalculated += new EventHandler<FftEventArgs>(FftCalculated);
         sampleAggregator.PerformFFT = true;
 
-        waveIn = new WasapiLoopbackCapture();
         waveIn.DataAvailable += OnDataAvailable;
+    }
 
-        waveIn.StartRecording();
+    public void Dispose()
+    {
+        waveIn.DataAvailable -= OnDataAvailable;
     }
 
     private void OnDataAvailable(object? sender, WaveInEventArgs e)
@@ -77,7 +80,7 @@ internal class AudioBeatDetector
 
         double averageEnergyLevel = beatChunk.EnergyHistory.Count > 0 ? beatChunk.EnergyHistory.Average() : double.MaxValue;
 
-        if (beatChunk.StopWatch.Elapsed >= beatDetectionDelay)
+        if (beatChunk.StopWatch.Elapsed >= beatDetectionDelay || beatDetectionDelay <= TimeSpan.Zero)
         {
             double difference = energyLevel - averageEnergyLevel;
 
@@ -88,6 +91,11 @@ internal class AudioBeatDetector
             }
             else
             {
+                //if (difference > 0)
+                //{
+                //    beatChunk.AverageDifference = (difference + beatChunk.AverageDifference) / 2.00001;
+                //}
+
                 OnNoBeat?.Invoke(this, new BeatDetectorEventArgs(chunkIndex, 0));
             }
             beatChunk.StopWatch.Restart();

AudioProcessing/BeatChunk.cs

@@ -8,4 +8,6 @@ internal class BeatChunk
     public Stopwatch StopWatch { get; } = new Stopwatch();
     public List<double> EnergyHistory { get; } = new List<double>();
     public double AverageDifference { get; set; }
+
+    public int NoBeatCount { get; set; }
 }

MainWindow.xaml

@@ -5,12 +5,12 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:local="clr-namespace:BeatDetector" d:DataContext="{d:DesignInstance Type=local:MainWindow}"
         mc:Ignorable="d"
-        Title="MainWindow" Height="450" Width="800">
+        Title="MainWindow" Height="450" Width="800" KeyUp="Window_KeyUp" ResizeMode="NoResize">
     <Grid Name="MainGrid">
-        <ItemsControl ItemsSource="{Binding BeatLights}" Background="Green">
+        <ItemsControl ItemsSource="{Binding BeatLights}" Background="Black">
             <ItemsControl.ItemTemplate>
                 <DataTemplate>
-                    <Grid Background="{Binding Color}" Margin="10" Width="100" Height="100"></Grid>
+                    <Grid Background="{Binding Color}" Margin="5" Width="100" Height="100"></Grid>
                 </DataTemplate>
             </ItemsControl.ItemTemplate>
             <ItemsControl.ItemsPanel>

MainWindow.xaml.cs

@@ -1,8 +1,11 @@
 using BeatDetector.AudioProcessing;
 
+using NAudio.Wave;
+
 using System;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
+using System.Linq;
 using System.Runtime.CompilerServices;
 using System.Windows;
 using System.Windows.Media;
@@ -15,6 +18,19 @@ namespace BeatDetector;
 /// </summary>
 public partial class MainWindow : Window
 {
+    private readonly Brush[] brushes = new Brush[]
+    {
+        Brushes.Red,
+        Brushes.Orange,
+        Brushes.Plum,
+        Brushes.Purple,
+        Brushes.Blue,
+        Brushes.Green,
+    };
+
+    private readonly IWaveIn audioStream;
+    private int lightAmountFactor = 3;
+    private AudioBeatDetector? audioBeatDetector;
     public ObservableCollection<BeatLight> BeatLights { get; } = new ObservableCollection<BeatLight>();
 
     public MainWindow()
@@ -22,24 +38,64 @@ public partial class MainWindow : Window
         DataContext = this;
         InitializeComponent();
 
-        for (int i = 0; i < 4; i++)
-        {
-            BeatLights.Add(new BeatLight());
-        }
+        audioStream = new WasapiLoopbackCapture();
+        audioStream.StartRecording();
 
-        AudioBeatDetector audioBeatDetector = new AudioBeatDetector(new TimeSpan(0, 0, 0, 0, 100), 1024 * 2, BeatLights.Count);
-        audioBeatDetector.OnBeat += AudioBeatDetector_OnBeat;
-        audioBeatDetector.OnNoBeat += AudioBeatDetector_OnNoBeat;
+        SetupAudioBeatDetector();
     }
 
     private void AudioBeatDetector_OnBeat(object? sender, BeatDetectorEventArgs e)
     {
-        Dispatcher.Invoke(() => BeatLights[e.ChunkIndex].Color = Brushes.Red);
+        Dispatcher.Invoke(() =>
+        {
+            double index = (brushes.Length - 1) / (double)BeatLights.Count * BeatLights.Count(x => x.Color != Brushes.White);
+            BeatLights[e.ChunkIndex].Color = brushes[(int)index];
+        });
     }
 
     private void AudioBeatDetector_OnNoBeat(object? sender, BeatDetectorEventArgs e)
     {
-        Dispatcher.Invoke(() => BeatLights[e.ChunkIndex].Color = Brushes.White);
+        _ = Dispatcher.Invoke(() => BeatLights[e.ChunkIndex].Color = Brushes.White);
+    }
+
+    private void Window_KeyUp(object sender, System.Windows.Input.KeyEventArgs e)
+    {
+        if (e.Key == System.Windows.Input.Key.Add && lightAmountFactor < 10)
+        {
+            lightAmountFactor++;
+            audioBeatDetector?.Dispose();
+            SetupAudioBeatDetector();
+        }
+        else if (e.Key == System.Windows.Input.Key.Subtract && lightAmountFactor > 1)
+        {
+            lightAmountFactor--;
+            audioBeatDetector?.Dispose();
+            SetupAudioBeatDetector();
+        }
+    }
+
+    private void SetupAudioBeatDetector()
+    {
+        BeatLights.Clear();
+
+        for (int i = 0; i < Math.Pow(lightAmountFactor, 2); i++)
+        {
+            BeatLights.Add(new BeatLight());
+        }
+
+        if (audioBeatDetector is not null)
+        {
+            audioBeatDetector.OnBeat -= AudioBeatDetector_OnBeat;
+            audioBeatDetector.OnNoBeat -= AudioBeatDetector_OnNoBeat;
+        }
+
+        audioBeatDetector = new AudioBeatDetector(audioStream, TimeSpan.FromMilliseconds(0), 1024 * 2, BeatLights.Count);
+
+        audioBeatDetector.OnBeat += AudioBeatDetector_OnBeat;
+        audioBeatDetector.OnNoBeat += AudioBeatDetector_OnNoBeat;
+
+        Width = (Math.Sqrt(BeatLights.Count) * 110) + 15;
+        Height = (Math.Sqrt(BeatLights.Count) * 110) + 40;
     }
 }