forked from eden-emu/eden
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
|
/*
|
||
|
|
* Copyright 2018 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef SHARED_MONOTOSTEREO_H
|
||
|
|
#define SHARED_MONOTOSTEREO_H
|
||
|
|
|
||
|
|
#include "IRenderableAudio.h"
|
||
|
|
|
||
|
|
|
||
|
|
class MonoToStereo : public IRenderableAudio {
|
||
|
|
|
||
|
|
public:
|
||
|
|
|
||
|
|
MonoToStereo(IRenderableAudio *input) : mInput(input){};
|
||
|
|
|
||
|
|
void renderAudio(float *audioData, int32_t numFrames) override {
|
||
|
|
|
||
|
|
constexpr int kChannelCountStereo = 2;
|
||
|
|
|
||
|
|
mInput->renderAudio(audioData, numFrames);
|
||
|
|
|
||
|
|
// We assume that audioData has sufficient frames to hold the stereo output, so copy each
|
||
|
|
// frame in the input to the output twice, working our way backwards through the input array
|
||
|
|
// e.g. 123 => 112233
|
||
|
|
for (int i = numFrames - 1; i >= 0; --i) {
|
||
|
|
|
||
|
|
audioData[i * kChannelCountStereo] = audioData[i];
|
||
|
|
audioData[i * kChannelCountStereo + 1] = audioData[i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
IRenderableAudio *mInput;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
#endif //SHARED_MONOTOSTEREO_H
|