From 6084053d60d2afb4de6a4e1448436fd13ab88493 Mon Sep 17 00:00:00 2001
From: Dominik Kaiser
Date: Fri, 26 Sep 2025 11:55:59 +0200
Subject: Implement SchroederReverb framework

---
 src/DSP/SchroederReverb.cpp | 27 +++++++++++++++++++++++++++
 src/DSP/SchroederReverb.h   | 16 ++++++++++++++++
 src/PluginProcessor.cpp     |  4 ++--
 src/PluginProcessor.h       |  4 ++--
 4 files changed, 47 insertions(+), 4 deletions(-)
 create mode 100644 src/DSP/SchroederReverb.cpp
 create mode 100644 src/DSP/SchroederReverb.h

diff --git a/src/DSP/SchroederReverb.cpp b/src/DSP/SchroederReverb.cpp
new file mode 100644
index 0000000..8bd764d
--- /dev/null
+++ b/src/DSP/SchroederReverb.cpp
@@ -0,0 +1,27 @@
+#include "SchroederReverb.h"
+
+void SchroederReverb::prepare(double sampleRate, int samplesPerBlock) {
+  combFilter0.prepare(sampleRate, samplesPerBlock);
+  combFilter1.prepare(sampleRate, samplesPerBlock);
+  combFilter2.prepare(sampleRate, samplesPerBlock);
+  combFilter3.prepare(sampleRate, samplesPerBlock);
+  allPassFilter0.prepare(sampleRate, samplesPerBlock);
+  allPassFilter1.prepare(sampleRate, samplesPerBlock);    
+}
+
+void SchroederReverb::process(float *sample) {
+  float in0 = *sample;
+  float in1 = *sample;
+  float in2 = *sample;
+  float in3 = *sample;
+
+  combFilter0.process(&in0);
+  combFilter1.process(&in1);
+  combFilter2.process(&in2);
+  combFilter3.process(&in3);
+
+  float allPassIn = in0 + in1 + in2 + in3;
+  allPassFilter0.process(&allPassIn);
+  allPassFilter1.process(&allPassIn);
+  *sample = allPassIn;
+}
diff --git a/src/DSP/SchroederReverb.h b/src/DSP/SchroederReverb.h
new file mode 100644
index 0000000..8c4567a
--- /dev/null
+++ b/src/DSP/SchroederReverb.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include <juce_audio_processors/juce_audio_processors.h>
+#include "CombFilter.h"
+#include "AllPassFilter.h"
+
+class SchroederReverb {
+public:
+  void prepare(double sampleRate, int samplesPerBlock);
+  void reset();
+  void process(float* sample);
+
+private:
+  CombFilter combFilter0, combFilter1, combFilter2, combFilter3;
+  AllPassFilter allPassFilter0, allPassFilter1;
+};
diff --git a/src/PluginProcessor.cpp b/src/PluginProcessor.cpp
index 1b4ada7..c1f4373 100644
--- a/src/PluginProcessor.cpp
+++ b/src/PluginProcessor.cpp
@@ -88,7 +88,7 @@ void SchroederReverbAudioProcessor::prepareToPlay (double sampleRate, int sample
 {
     // Use this method as the place to do any pre-playback
     // initialisation that you need..
-    combFilter.prepare(sampleRate, samplesPerBlock);
+    schroederReverb.prepare(sampleRate, samplesPerBlock);
 }
 
 void SchroederReverbAudioProcessor::releaseResources()
@@ -149,7 +149,7 @@ void SchroederReverbAudioProcessor::processBlock (juce::AudioBuffer<float>& buff
     {
       auto *channelData = buffer.getWritePointer(channel);
       for (int i = 0; i < buffer.getNumSamples(); ++i) {
-	        combFilter.process(&channelData[i]);
+	        schroederReverb.process(&channelData[i]);
         }
         // ..do something to the data...
     }
diff --git a/src/PluginProcessor.h b/src/PluginProcessor.h
index ce21b96..1d31a49 100644
--- a/src/PluginProcessor.h
+++ b/src/PluginProcessor.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <juce_audio_processors/juce_audio_processors.h>
-#include "DSP/CombFilter.h"
+#include "DSP/SchroederReverb.h"
 
 //==============================================================================
 class SchroederReverbAudioProcessor final : public juce::AudioProcessor
@@ -45,6 +45,6 @@ public:
 
 private:
   //==============================================================================
-  CombFilter combFilter;
+  SchroederReverb schroederReverb;
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (SchroederReverbAudioProcessor)
 };
-- 
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