forked from eden-emu/eden
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SHARED_MONOTOSTEREO_H
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#define SHARED_MONOTOSTEREO_H
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#include "IRenderableAudio.h"
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class MonoToStereo : public IRenderableAudio {
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public:
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MonoToStereo(IRenderableAudio *input) : mInput(input){};
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void renderAudio(float *audioData, int32_t numFrames) override {
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constexpr int kChannelCountStereo = 2;
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mInput->renderAudio(audioData, numFrames);
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// We assume that audioData has sufficient frames to hold the stereo output, so copy each
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// frame in the input to the output twice, working our way backwards through the input array
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// e.g. 123 => 112233
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for (int i = numFrames - 1; i >= 0; --i) {
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audioData[i * kChannelCountStereo] = audioData[i];
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audioData[i * kChannelCountStereo + 1] = audioData[i];
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}
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}
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IRenderableAudio *mInput;
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};
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#endif //SHARED_MONOTOSTEREO_H
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