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_OPTIONS_INTERFACE_H_ 18 #define V4L2_CAMERA_HAL_METADATA_CONTROL_OPTIONS_INTERFACE_H_ 19 20 #include <vector> 21 22 namespace v4l2_camera_hal { 23 24 // A ControlOptions defines acceptable values for a control. 25 template <typename T> 26 class ControlOptionsInterface { 27 public: 28 virtual ~ControlOptionsInterface(){}; 29 30 // Get a metadata-acceptable representation of the options. 31 // For enums this will be a list of values, for ranges this 32 // will be min and max, etc. 33 virtual std::vector<T> MetadataRepresentation() = 0; 34 // Get whether or not a given value is acceptable. 35 virtual bool IsSupported(const T& option); 36 // Get a default option for a given template type, from the available options. 37 // Because a default must be available, any ControlOptions should have at 38 // least one supported value. 39 virtual int DefaultValueForTemplate(int template_type, T* default_value); 40 }; 41 42 } // namespace v4l2_camera_hal 43 44 #endif // V4L2_CAMERA_HAL_METADATA_CONTROL_OPTIONS_INTERFACE_H_ 45
