1 // Tencent is pleased to support the open source community by making ncnn available. 2 // 3 // Copyright (C) 2017 THL A29 Limited, a Tencent company. All rights reserved. 4 // 5 // Licensed under the BSD 3-Clause License (the "License"); you may not use this file except 6 // in compliance with the License. You may obtain a copy of the License at 7 // 8 // https://opensource.org/licenses/BSD-3-Clause 9 // 10 // Unless required by applicable law or agreed to in writing, software distributed 11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the 13 // specific language governing permissions and limitations under the License. 14 15 #include "dropout.h" 16 17 #include <math.h> 18 19 namespace ncnn { 20 Dropout()21Dropout::Dropout() 22 { 23 one_blob_only = true; 24 support_inplace = true; 25 } 26 load_param(const ParamDict & pd)27int Dropout::load_param(const ParamDict& pd) 28 { 29 scale = pd.get(0, 1.f); 30 31 return 0; 32 } 33 forward_inplace(Mat & bottom_top_blob,const Option & opt) const34int Dropout::forward_inplace(Mat& bottom_top_blob, const Option& opt) const 35 { 36 if (scale == 1.f) 37 { 38 return 0; 39 } 40 41 int w = bottom_top_blob.w; 42 int h = bottom_top_blob.h; 43 int channels = bottom_top_blob.c; 44 int size = w * h; 45 46 #pragma omp parallel for num_threads(opt.num_threads) 47 for (int q = 0; q < channels; q++) 48 { 49 float* ptr = bottom_top_blob.channel(q); 50 51 for (int i = 0; i < size; i++) 52 { 53 ptr[i] = ptr[i] * scale; 54 } 55 } 56 57 return 0; 58 } 59 60 } // namespace ncnn 61