1 files changed, 0 insertions, 63 deletions
diff --git a/externals/oboe/src/flowgraph/resampler/PolyphaseResamplerMono.cpp b/externals/oboe/src/flowgraph/resampler/PolyphaseResamplerMono.cpp
deleted file mode 100644
index fdaf13ea6a..0000000000
--- a/externals/oboe/src/flowgraph/resampler/PolyphaseResamplerMono.cpp
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <cassert>
-#include "PolyphaseResamplerMono.h"
-
-using namespace RESAMPLER_OUTER_NAMESPACE::resampler;
-
-#define MONO  1
-
-PolyphaseResamplerMono::PolyphaseResamplerMono(const MultiChannelResampler::Builder &builder)
-        : PolyphaseResampler(builder) {
-    assert(builder.getChannelCount() == MONO);
-}
-
-void PolyphaseResamplerMono::writeFrame(const float *frame) {
-    // Move cursor before write so that cursor points to last written frame in read.
-    if (--mCursor < 0) {
-        mCursor = getNumTaps() - 1;
-    }
-    float *dest = &mX[mCursor * MONO];
-    const int offset = mNumTaps * MONO;
-    // Write each channel twice so we avoid having to wrap when running the FIR.
-    const float sample =  frame[0];
-    // Put ordered writes together.
-    dest[0] = sample;
-    dest[offset] = sample;
-}
-
-void PolyphaseResamplerMono::readFrame(float *frame) {
-    // Clear accumulator.
-    float sum = 0.0;
-
-    // Multiply input times precomputed windowed sinc function.
-    const float *coefficients = &mCoefficients[mCoefficientCursor];
-    float *xFrame = &mX[mCursor * MONO];
-    const int numLoops = mNumTaps >> 2; // n/4
-    for (int i = 0; i < numLoops; i++) {
-        // Manual loop unrolling, might get converted to SIMD.
-        sum += *xFrame++ * *coefficients++;
-        sum += *xFrame++ * *coefficients++;
-        sum += *xFrame++ * *coefficients++;
-        sum += *xFrame++ * *coefficients++;
-    }
-
-    mCoefficientCursor = (mCoefficientCursor + mNumTaps) % mCoefficients.size();
-
-    // Copy accumulator to output.
-    frame[0] = sum;
-}