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_CONTROL_DELEGATE_INTERFACE_H_ 18 #define V4L2_CAMERA_HAL_METADATA_CONTROL_DELEGATE_INTERFACE_H_ 19 20 #include "state_delegate_interface.h" 21 22 namespace v4l2_camera_hal { 23 24 // A ControlDelegate extends StateDelegate with a setter method. 25 template <typename T> 26 class ControlDelegateInterface : public StateDelegateInterface<T> { 27 public: 28 virtual ~ControlDelegateInterface(){}; 29 30 // ControlDelegates are allowed to be unreliable, so SetValue is best-effort; 31 // GetValue immediately after may not match (SetValue may, for example, 32 // automatically replace invalid values with valid ones, 33 // or have a delay before setting the requested value). 34 // Returns 0 on success, error code on failure. 35 virtual int SetValue(const T& value) = 0; 36 // Children must also override GetValue from StateDelegateInterface. 37 }; 38 39 } // namespace v4l2_camera_hal 40 41 #endif // V4L2_CAMERA_HAL_METADATA_CONTROL_DELEGATE_INTERFACE_H_ 42
