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/*
* 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 OBOETESTER_INTERPOLATING_DELAY_LINE_H
#define OBOETESTER_INTERPOLATING_DELAY_LINE_H
#include <memory>
#include <unistd.h>
#include <sys/types.h>
/**
* Monophonic delay line.
*/
class InterpolatingDelayLine {
public:
explicit InterpolatingDelayLine(int32_t delaySize);
/**
* @param input sample to be written to the delay line
* @param delay number of samples to delay the output
* @return delayed value
*/
float process(float delay, float input);
private:
std::unique_ptr<float[]> mDelayLine;
int32_t mCursor = 0;
int32_t mDelaySize = 0;
};
#endif //OBOETESTER_INTERPOLATING_DELAY_LINE_H
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