/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_SOFTMAX_H_
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#define NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_SOFTMAX_H_
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#include <vector>
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namespace libtextclassifier3 {
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namespace mobile {
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// Computes probability of a softmax label. Parameter "scores" is the vector of
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// softmax logits. Returns 0.0f if "label" is outside the range [0,
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// scores.size()).
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float ComputeSoftmaxProbability(const std::vector<float> &scores, int label);
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// Computes and returns a softmax for a given vector of floats. Parameter
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// "scores" is the vector of softmax logits.
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//
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// The alpha parameter is a scaling factor on the logits.
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std::vector<float> ComputeSoftmax(const std::vector<float> &scores,
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float alpha = 1.0f);
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} // namespace mobile
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} // namespace nlp_saft
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#endif // NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_SOFTMAX_H_
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