Implement GainEffect node

src/Sound/Filters/GainEffect.cpp

@@ -0,0 +1,15 @@
+#include "./GainEffect.hpp"
+
+namespace Dynamo::Sound {
+    Sound &GainEffect::process(Sound &src,
+                               u32 offset,
+                               u32 length,
+                               ListenerSet &listeners) {
+        for (u32 c = 0; c < src.channels(); c++) {
+            for (u32 f = 0; f < length; f++) {
+                _output[c][f] = src[c][f + offset] * _gain;
+            }
+        }
+        return _output;
+    }
+} // namespace Dynamo::Sound

src/Sound/Filters/GainEffect.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "../../Types.hpp"
+#include "../EffectNode.hpp"
+
+namespace Dynamo::Sound {
+    /**
+     * @brief Gain filter implementation.
+     *
+     */
+    class GainEffect : public EffectNode {
+        f32 _gain;
+        Sound _output;
+
+      public:
+        /**
+         * @brief Set the position of the sound source.
+         *
+         * @param position
+         */
+        inline void set_gain(f32 gain) { _gain = gain; }
+
+        Sound &process(Sound &src,
+                       u32 offset,
+                       u32 length,
+                       ListenerSet &listeners) override;
+    };
+} // namespace Dynamo::Sound