AudioSelector

Assets/Util/SpectrumShaderBinder.cs

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+using UnityEngine;
+using System.Collections.Generic;
+using Assets.WasapiAudio.Scripts.Unity;
+
+// only slightly different from the SpectrumMaterialBinder
+// in that it modifies a single material for a shader
+// instead of the renderer's instance of that material
+
+[RequireComponent(typeof(Material))]
+public class SpectrumShaderBinder : MonoBehaviour
+{
+    public WasapiAudioSource source;
+    public Material material;
+
+    private Texture2D _texture;
+    private Color[] _colorCache;
+
+    [SerializeReference]
+    [SerializeReferenceButton]
+    public List<SpectrumTransformer> Transformers = new List<SpectrumTransformer>();
+
+    [SpectrumDataPreview]
+    public SpectrumData Preview;
+
+    private void Start() {
+        if (source == null) {
+            Debug.Log("Material Binder needs WASAPI Source.");
+            gameObject.SetActive(false);
+        }
+    }
+
+    private void Update() {
+        UpdateTexture();
+        UpdateBinding();
+    }
+
+    private void InitialiseTexture() {
+        Debug.Log("Reinitialising spectrum texture...");
+        _texture = new Texture2D(source.SpectrumSize, 1, TextureFormat.RFloat, false);
+        _colorCache = new Color[source.SpectrumSize];
+        _texture.name = $"AudioSpectrum{source.SpectrumSize}";
+    }
+
+    private float[] GetSpectrumData() {
+        // Get raw / unmodified spectrum data
+        var spectrumData = source.GetSpectrumData();
+
+        // Run spectrum data through all configured transformers
+        if (Transformers != null && Transformers.Count > 0) {
+            foreach (var transformer in Transformers) {
+                spectrumData = transformer.Transform(spectrumData);
+            }
+        }
+
+        Preview.Values = spectrumData;
+
+        return spectrumData;
+    }
+
+    private void UpdateTexture() {
+        // init
+        if (_texture == null) InitialiseTexture();
+
+        var spectrumData = GetSpectrumData();
+
+        for (int i = 0; i < source.SpectrumSize; i++) {
+            _colorCache[i] = new Color(spectrumData[i], 0, 0, 0);
+        }
+
+        _texture.SetPixels(_colorCache);
+        _texture.wrapMode = TextureWrapMode.Clamp;
+        _texture.Apply();
+    }
+
+    public void UpdateBinding() {
+        UpdateTexture();
+
+        // !!!!
+        // you must set these via a literal string for some raeson
+        // having them as a public property didn't work
+        material.SetFloat("_SpectrumSize", source.SpectrumSize);
+        material.SetTexture("_SpectrumTexture", _texture);
+    }
+
+    public string ToString() {
+        return "Spectrum Material Binder";
+    }
+}