1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_SOFTMAX_H_ 18 #define NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_SOFTMAX_H_ 19 20 #include <vector> 21 22 namespace libtextclassifier3 { 23 namespace mobile { 24 25 // Computes probability of a softmax label. Parameter "scores" is the vector of 26 // softmax logits. Returns 0.0f if "label" is outside the range [0, 27 // scores.size()). 28 float ComputeSoftmaxProbability(const std::vector<float> &scores, int label); 29 30 // Computes and returns a softmax for a given vector of floats. Parameter 31 // "scores" is the vector of softmax logits. 32 // 33 // The alpha parameter is a scaling factor on the logits. 34 std::vector<float> ComputeSoftmax(const std::vector<float> &scores, 35 float alpha = 1.0f); 36 37 } // namespace mobile 38 } // namespace nlp_saft 39 40 #endif // NLP_SAFT_COMPONENTS_COMMON_MOBILE_MATH_SOFTMAX_H_ 41