1 /*
2  * Copyright (C) 2016 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 V4L2_CAMERA_HAL_METADATA_IGNORED_CONTROL_DELEGATE_H_
18 #define V4L2_CAMERA_HAL_METADATA_IGNORED_CONTROL_DELEGATE_H_
19 
20 #include "control_delegate_interface.h"
21 
22 namespace v4l2_camera_hal {
23 
24 // An IgnoredControlDelegate, as the name implies,
25 // has a fixed value and ignores all requests to set it.
26 template <typename T>
27 class IgnoredControlDelegate : public ControlDelegateInterface<T> {
28  public:
IgnoredControlDelegate(T value)29   IgnoredControlDelegate(T value) : value_(value){};
30 
GetValue(T * value)31   int GetValue(T* value) override {
32     *value = value_;
33     return 0;
34   };
SetValue(const T &)35   int SetValue(const T& /*value*/) override { return 0; };
36 
37  private:
38   const T value_;
39 };
40 
41 }  // namespace v4l2_camera_hal
42 
43 #endif  // V4L2_CAMERA_HAL_METADATA_IGNORED_CONTROL_DELEGATE_H_
44