From 36d8edfb07022a7eaab797ebbc12101e389b11fb686fa85029b404adf77dd6cb Mon Sep 17 00:00:00 2001
From: copecone <controld3785@gmail.com>
Date: Sat, 11 Jul 2026 00:24:50 +0900
Subject: [PATCH] Add Gain Filter

---
 Util/Audio/Filter/Gain.cs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 Util/Audio/Filter/Gain.cs

diff --git a/Util/Audio/Filter/Gain.cs b/Util/Audio/Filter/Gain.cs
new file mode 100644
index 0000000..645978c
--- /dev/null
+++ b/Util/Audio/Filter/Gain.cs
@@ -0,0 +1,22 @@
+using System;
+
+namespace ADOFAIRenderer.Util.Audio.Filter
+{
+    public class Gain : IAudioFilter
+    {
+        public float Level = 0f;
+
+        public void Initialize(int sampleRate, int channels) { }
+
+        public float ProcessSample(float sample, int channel) =>
+            sample * (float)Math.Pow(10, Level / 20);
+
+        public void ProcessBlock(Span<float> buffer)
+        {
+            for (var i = 0; i < buffer.Length; i++)
+                buffer[i] = ProcessSample(buffer[i], 0); 
+        }
+
+        public void Reset() { }
+    }
+}
\ No newline at end of file