| /* |
| * Copyright (C) 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. |
| */ |
| |
| package com.android.nn.benchmark.core; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| |
| /** |
| * Means and standard deviations for a model's output, used for de-normalization. |
| */ |
| public class OutputMeanStdDev { |
| private int mNumOutputs; |
| private MeanStdDev mMeanStdDevs[]; |
| |
| public OutputMeanStdDev(byte[] bytes) { |
| mNumOutputs = bytes.length / MeanStdDev.DATA_SIZE_BYTES; |
| mMeanStdDevs = new MeanStdDev[mNumOutputs]; |
| ByteBuffer buffer = ByteBuffer.wrap(bytes); |
| buffer.order(ByteOrder.LITTLE_ENDIAN); |
| for (int i = 0; i < mNumOutputs; ++i) { |
| mMeanStdDevs[i] = new MeanStdDev(buffer.getFloat(), buffer.getFloat()); |
| } |
| } |
| |
| public float[] denormalize(float[] values) { |
| if (values.length != mNumOutputs) { |
| throw new IllegalArgumentException("Invalid number of values: " + values.length); |
| } |
| float[] results = new float[mNumOutputs]; |
| for (int i = 0; i < mNumOutputs; ++i) { |
| results[i] = mMeanStdDevs[i].denormalize(values[i]); |
| } |
| return results; |
| } |
| } |