1 files changed, 0 insertions, 79 deletions
diff --git a/src/audio_core/algorithm/filter.cpp b/src/audio_core/algorithm/filter.cpp
deleted file mode 100644
index 96e37991f..000000000
--- a/src/audio_core/algorithm/filter.cpp
+++ /dev/null
@@ -1,79 +0,0 @@
-// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
-// SPDX-License-Identifier: GPL-2.0-or-later
-
-#define _USE_MATH_DEFINES
-
-#include <algorithm>
-#include <array>
-#include <cmath>
-#include <vector>
-#include "audio_core/algorithm/filter.h"
-#include "common/common_types.h"
-
-namespace AudioCore {
-
-Filter Filter::LowPass(double cutoff, double Q) {
-    const double w0 = 2.0 * M_PI * cutoff;
-    const double sin_w0 = std::sin(w0);
-    const double cos_w0 = std::cos(w0);
-    const double alpha = sin_w0 / (2 * Q);
-
-    const double a0 = 1 + alpha;
-    const double a1 = -2.0 * cos_w0;
-    const double a2 = 1 - alpha;
-    const double b0 = 0.5 * (1 - cos_w0);
-    const double b1 = 1.0 * (1 - cos_w0);
-    const double b2 = 0.5 * (1 - cos_w0);
-
-    return {a0, a1, a2, b0, b1, b2};
-}
-
-Filter::Filter() : Filter(1.0, 0.0, 0.0, 1.0, 0.0, 0.0) {}
-
-Filter::Filter(double a0_, double a1_, double a2_, double b0_, double b1_, double b2_)
-    : a1(a1_ / a0_), a2(a2_ / a0_), b0(b0_ / a0_), b1(b1_ / a0_), b2(b2_ / a0_) {}
-
-void Filter::Process(std::vector<s16>& signal) {
-    const std::size_t num_frames = signal.size() / 2;
-    for (std::size_t i = 0; i < num_frames; i++) {
-        std::rotate(in.begin(), in.end() - 1, in.end());
-        std::rotate(out.begin(), out.end() - 1, out.end());
-
-        for (std::size_t ch = 0; ch < channel_count; ch++) {
-            in[0][ch] = signal[i * channel_count + ch];
-
-            out[0][ch] = b0 * in[0][ch] + b1 * in[1][ch] + b2 * in[2][ch] - a1 * out[1][ch] -
-                         a2 * out[2][ch];
-
-            signal[i * 2 + ch] = static_cast<s16>(std::clamp(out[0][ch], -32768.0, 32767.0));
-        }
-    }
-}
-
-/// Calculates the appropriate Q for each biquad in a cascading filter.
-/// @param total_count The total number of biquads to be cascaded.
-/// @param index 0-index of the biquad to calculate the Q value for.
-static double CascadingBiquadQ(std::size_t total_count, std::size_t index) {
-    const auto pole =
-        M_PI * static_cast<double>(2 * index + 1) / (4.0 * static_cast<double>(total_count));
-    return 1.0 / (2.0 * std::cos(pole));
-}
-
-CascadingFilter CascadingFilter::LowPass(double cutoff, std::size_t cascade_size) {
-    std::vector<Filter> cascade(cascade_size);
-    for (std::size_t i = 0; i < cascade_size; i++) {
-        cascade[i] = Filter::LowPass(cutoff, CascadingBiquadQ(cascade_size, i));
-    }
-    return CascadingFilter{std::move(cascade)};
-}
-
-CascadingFilter::CascadingFilter() = default;
-CascadingFilter::CascadingFilter(std::vector<Filter> filters_) : filters(std::move(filters_)) {}
-
-void CascadingFilter::Process(std::vector<s16>& signal) {
-    for (auto& filter : filters) {
-        filter.Process(signal);
-    }
-}
-
-} // namespace AudioCore