From 11f701ed5ccb1d8148cfb5b353096d69dbbe1450 Mon Sep 17 00:00:00 2001
From: Liam Kerr <liam.d.kerr@protonmail.com>
Date: Sun, 2 Aug 2026 19:38:30 +0100
Subject: [PATCH] feat: add Gain Node

---
 .clangd                            |  1 +
 core/Gain.cpp                      | 17 +++++++++++++++++
 core/Gain.hpp                      | 24 ++++++++++++++++++++++++
 plugins/SquidgeDistortion/Makefile |  2 +-
 4 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 core/Gain.cpp
 create mode 100644 core/Gain.hpp

diff --git a/.clangd b/.clangd
index f5fe506..e3b4e35 100644
--- a/.clangd
+++ b/.clangd
@@ -3,6 +3,7 @@ CompileFlags:
     - -Idpf/distrho
     - -Idpf/include
     - -Iplugins/SquidgeDistortion
+    - -Icore
     - -DDISTRHO_PLUGIN_MAGIC=1
   Remove:
     - -fno-gnu-unique
\ No newline at end of file
diff --git a/core/Gain.cpp b/core/Gain.cpp
new file mode 100644
index 0000000..088a1f5
--- /dev/null
+++ b/core/Gain.cpp
@@ -0,0 +1,17 @@
+#include "Gain.hpp"
+
+Gain::Gain(float init_gain) : gain_(init_gain) {}
+
+void Gain::process(const float *in, float *out, uint32_t frames) {
+  for (uint32_t i = 0; i < frames; ++i) {
+    out[i] = in[i] * gain_;
+  }
+}
+
+void Gain::processStereo(const float *inLeft, const float *inRight,
+                         float *outLeft, float *outRight, uint32_t frames) {
+  for (uint32_t i = 0; i < frames; ++i) {
+    outLeft[i] = inLeft[i] * gain_;
+    outRight[i] = inRight[i] * gain_;
+  }
+}
diff --git a/core/Gain.hpp b/core/Gain.hpp
new file mode 100644
index 0000000..0624eab
--- /dev/null
+++ b/core/Gain.hpp
@@ -0,0 +1,24 @@
+#ifndef GAIN_HPP_INCLUDED
+#define GAIN_HPP_INCLUDED
+
+#include <cstdint>
+
+class Gain {
+public:
+  Gain(float init_gain = 1.0f);
+  // Process mono signal
+  void process(const float *in, float *out, uint32_t frames);
+
+  // Process stereo (two channels)
+  void processStereo(const float *inLeft, const float *inRight, float *outLeft,
+                     float *outRight, uint32_t frames);
+
+private:
+  float gain_;
+
+public:
+  void setGain(float g) { gain_ = g; }
+  float getGain() const { return gain_; }
+};
+
+#endif // GAIN_H__INCLUDED
\ No newline at end of file
diff --git a/plugins/SquidgeDistortion/Makefile b/plugins/SquidgeDistortion/Makefile
index 49e290f..4055cd1 100644
--- a/plugins/SquidgeDistortion/Makefile
+++ b/plugins/SquidgeDistortion/Makefile
@@ -1,7 +1,7 @@
 #!/usr/bin/make -f
 NAME = SquidgeDistortion
 
-FILES_DSP = SquidgeDistortion.cpp
+FILES_DSP = SquidgeDistortion.cpp ../../core/Gain.cpp
 
 TARGETS = vst3 clap