ncnn
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 "shrink.h"
16
17namespace ncnn {
18
19Shrink::Shrink()
20{
21one_blob_only = true;
22support_inplace = true;
23}
24
25int Shrink::load_param(const ParamDict& pd)
26{
27bias = pd.get(0, 0.0f);
28lambd = pd.get(1, 0.5f);
29
30return 0;
31}
32
33int Shrink::forward_inplace(Mat& bottom_top_blob, const Option& opt) const
34{
35int w = bottom_top_blob.w;
36int h = bottom_top_blob.h;
37int channels = bottom_top_blob.c;
38int size = w * h;
39
40#pragma omp parallel for num_threads(opt.num_threads)
41for (int q = 0; q < channels; q++)
42{
43float* ptr = bottom_top_blob.channel(q);
44
45for (int i = 0; i < size; i++)
46{
47ptr[i] = ptr[i] < -lambd ? ptr[i] + bias : ptr[i] > lambd ? ptr[i] - bias : ptr[i];
48}
49}
50
51return 0;
52}
53
54} // namespace ncnn
55