ebiten/audio/internal/oboe/oboe_flowgraph_resampler_SincResampler_android.h

48 lines
1.3 KiB
C++
Vendored

/*
* 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.
*/
#ifndef OBOE_SINC_RESAMPLER_H
#define OBOE_SINC_RESAMPLER_H
#include <memory>
#include <sys/types.h>
#include <unistd.h>
#include "oboe_flowgraph_resampler_MultiChannelResampler_android.h"
namespace resampler {
/**
* Resampler that can interpolate between coefficients.
* This can be used to support arbitrary ratios.
*/
class SincResampler : public MultiChannelResampler {
public:
explicit SincResampler(const MultiChannelResampler::Builder &builder);
virtual ~SincResampler() = default;
void readFrame(float *frame) override;
protected:
std::vector<float> mSingleFrame2; // for interpolation
int32_t mNumRows = 0;
double mPhaseScaler = 1.0;
};
}
#endif //OBOE_SINC_RESAMPLER_H