apps/OboeTester/app/src/main/cpp/flowunits/LinearShape.cpp

/*
 * 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 "LinearShape.h"

using namespace oboe::flowgraph;

LinearShape::LinearShape()
        : FlowGraphFilter(1) {
}

int32_t LinearShape::onProcess(int numFrames) {
    float *inputs = input.getBuffer();
    float *outputs = output.getBuffer();

    for (int i = 0; i < numFrames; i++) {
        float normalizedPhase = (inputs[i] * 0.5f) + 0.5f; // from 0.0 to 1.0
        outputs[i] = mMinimum + (normalizedPhase * (mMaximum - mMinimum));
    }

    return numFrames;
}