1 files changed, 0 insertions, 38 deletions
diff --git a/intern/audaspace/FX/AUD_ButterworthCalculator.cpp b/intern/audaspace/FX/AUD_ButterworthCalculator.cpp
deleted file mode 100644
index 7a3c6f71e15..00000000000
--- a/intern/audaspace/FX/AUD_ButterworthCalculator.cpp
+++ /dev/null
@@ -1,38 +0,0 @@
-#include "AUD_ButterworthCalculator.h"
-
-#include <cmath>
-
-#ifndef M_PI
-#define M_PI 3.14159265358979323846
-#endif
-
-#define BWPB41 0.76536686473
-#define BWPB42 1.84775906502
-
-AUD_ButterworthCalculator::AUD_ButterworthCalculator(float frequency) :
-	m_frequency(frequency)
-{
-}
-
-void AUD_ButterworthCalculator::recalculateCoefficients(AUD_SampleRate rate, std::vector<float> &b, std::vector<float> &a)
-{
-	float omega = 2 * tan(m_frequency * M_PI / rate);
-	float o2 = omega * omega;
-	float o4 = o2 * o2;
-	float x1 = o2 + 2.0f * (float)BWPB41 * omega + 4.0f;
-	float x2 = o2 + 2.0f * (float)BWPB42 * omega + 4.0f;
-	float y1 = o2 - 2.0f * (float)BWPB41 * omega + 4.0f;
-	float y2 = o2 - 2.0f * (float)BWPB42 * omega + 4.0f;
-	float o228 = 2.0f * o2 - 8.0f;
-	float norm = x1 * x2;
-	a.push_back(1);
-	a.push_back((x1 + x2) * o228 / norm);
-	a.push_back((x1 * y2 + x2 * y1 + o228 * o228) / norm);
-	a.push_back((y1 + y2) * o228 / norm);
-	a.push_back(y1 * y2 / norm);
-	b.push_back(o4 / norm);
-	b.push_back(4 * o4 / norm);
-	b.push_back(6 * o4 / norm);
-	b.push_back(b[1]);
-	b.push_back(b[0]);
-}