From eb1a82ac93343e86ef1c98caa512fcf2e52a546b Mon Sep 17 00:00:00 2001
From: wan-may <wnmy@protonmail.com>
Date: Mon, 20 Mar 2023 21:13:47 -0300
Subject: [PATCH] Back at it! Add limiter plugin.

---
 src/CMakeLists.txt                |  3 +-
 src/yaw-brick/CMakeLists.txt      |  9 ++++
 src/yaw-brick/DistrhoPluginInfo.h | 17 ++++++++
 src/yaw-brick/dsp.cpp             | 68 +++++++++++++++++++++++++++++++
 4 files changed, 96 insertions(+), 1 deletion(-)
 create mode 100644 src/yaw-brick/CMakeLists.txt
 create mode 100644 src/yaw-brick/DistrhoPluginInfo.h
 create mode 100644 src/yaw-brick/dsp.cpp

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index df15ee5..e6fb382 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -3,4 +3,5 @@ add_subdirectory(yaw-tab)
 add_subdirectory(yaw-shepard)
 add_subdirectory(yaw-vowel)
 add_subdirectory(yaw-totune)
-add_subdirectory(yaw-shep)
\ No newline at end of file
+add_subdirectory(yaw-shep)
+add_subdirectory(yaw-brick)
\ No newline at end of file
diff --git a/src/yaw-brick/CMakeLists.txt b/src/yaw-brick/CMakeLists.txt
new file mode 100644
index 0000000..5da3ae4
--- /dev/null
+++ b/src/yaw-brick/CMakeLists.txt
@@ -0,0 +1,9 @@
+dpf_add_plugin(yaw-brick
+  TARGETS vst2
+  FILES_DSP
+      dsp.cpp)
+
+      
+target_include_directories(yaw-brick PUBLIC 
+    "."
+    "../../lib")
\ No newline at end of file
diff --git a/src/yaw-brick/DistrhoPluginInfo.h b/src/yaw-brick/DistrhoPluginInfo.h
new file mode 100644
index 0000000..f724ea8
--- /dev/null
+++ b/src/yaw-brick/DistrhoPluginInfo.h
@@ -0,0 +1,17 @@
+#ifndef DISTRHO_PLUGIN_INFO_H_INCLUDED
+#define DISTRHO_PLUGIN_INFO_H_INCLUDED
+
+#define DISTRHO_PLUGIN_BRAND "yaw-audio"
+#define DISTRHO_PLUGIN_NAME  "yaw-brick"
+#define DISTRHO_PLUGIN_URI   "https://yaw.man/plugins/yaw-brick"
+
+#define DISTRHO_PLUGIN_IS_RT_SAFE   1
+#define DISTRHO_PLUGIN_NUM_INPUTS   2
+#define DISTRHO_PLUGIN_NUM_OUTPUTS  2
+
+enum Parameters {
+    kParamLimit = 0, //Maximum gain.
+    kParamGain     //Pre-amplification
+};
+
+#endif
diff --git a/src/yaw-brick/dsp.cpp b/src/yaw-brick/dsp.cpp
new file mode 100644
index 0000000..901975f
--- /dev/null
+++ b/src/yaw-brick/dsp.cpp
@@ -0,0 +1,68 @@
+#include "DistrhoPlugin.hpp"
+
+START_NAMESPACE_DISTRHO
+
+class Limiter : public Plugin
+{
+public:
+	Limiter()
+		: Plugin(2, 0, 0)
+	{
+	}
+
+protected:
+	const char *getLabel() const override { return "yaw-brick"; }
+	const char *getDescription() const override { return "Limiter"; }
+	const char *getMaker() const override { return "yaw-audio"; }
+	const char *getHomePage() const override { return "https://yaw.man/plugins/yaw-brick"; }
+	const char *getLicense() const override { return "Fuck you pay me"; }
+	uint32_t getVersion() const override { return d_version(1, 0, 0); }
+	int64_t getUniqueId() const override { return d_cconst('y', 'b', 'r', 'k'); }
+
+	void initParameter(uint32_t index, Parameter &parameter) override
+	{
+		parameter.hints = kParameterIsAutomable;
+		parameter.ranges.def = 0.0f;
+		parameter.ranges.min = 0.0f;
+		parameter.ranges.max = 1.0f;
+		parameter.name = "param";
+		parameter.symbol = "param";
+	}
+
+	void sampleRateChanged(double newRate) override
+	{}
+
+	float getParameterValue(uint32_t index) const override
+	{
+		return index ? gain : limit;
+	}
+
+	void setParameterValue(uint32_t idx, float val) override
+	{
+		if( idx ) { limit = val; }
+		else { gain = val; }
+	}
+
+	void run(const float **inputs, float **outputs, uint32_t frames) override
+	{
+		for (int chn = 0; chn < 2; ++chn)
+		{
+			for( uint32_t i = 0; i < frames; ++i){
+				float x = inputs[chn][i];
+				outputs[chn][i] = gain * limit * x / (1.f + gain * x);
+			}
+		}
+	}
+
+private:
+    double limit = 0.0;
+	double gain = 0.0;
+	DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(Limiter)
+};
+
+Plugin *createPlugin()
+{
+	return new Limiter();
+}
+
+END_NAMESPACE_DISTRHO