From c52f9a8babfffef1413df3e03dc6f16d5ffa2c85 Mon Sep 17 00:00:00 2001
From: Dominik Kaiser
Date: Mon, 6 Oct 2025 21:15:10 +0200
Subject: Add Pre-Delay

---
 src/DSP/Delay.cpp | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 src/DSP/Delay.cpp

(limited to 'src/DSP/Delay.cpp')

diff --git a/src/DSP/Delay.cpp b/src/DSP/Delay.cpp
new file mode 100644
index 0000000..50c310a
--- /dev/null
+++ b/src/DSP/Delay.cpp
@@ -0,0 +1,37 @@
+#include "Delay.h"
+
+void
+Delay::prepare(double sampleRate, int samplesPerBlock)
+{
+    int maxDelayTimeMs = 2000;
+    int maxDelaySamples = static_cast<int>(sampleRate * maxDelayTimeMs / 1000.0);
+
+    delayBuffer.resize(maxDelaySamples, 0.0f);
+    std::fill(delayBuffer.begin(), delayBuffer.end(), 0.0f);
+    delayBufferWritePos = 0;
+    this->sampleRate = sampleRate;
+}
+
+void
+Delay::process(float& sample)
+{
+    if (delayInSamples == 0)
+    {
+        return;
+    }
+    int delayBufferLength = (int)delayBuffer.size();
+    int delayReadPos
+        = (delayBufferWritePos - delayInSamples + delayBufferLength) % delayBufferLength;
+    float delayedSample = delayBuffer[delayReadPos];
+
+    delayBuffer[delayBufferWritePos] = sample;
+    sample = delayedSample;
+
+    delayBufferWritePos = (delayBufferWritePos + 1) % delayBufferLength;
+}
+
+void
+Delay::setDelayMs(float ms)
+{
+    delayInSamples = static_cast<int>(sampleRate * (ms / 1000.0f));
+}
-- 
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