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_MENU_CONTROL_OPTIONS_H_ 18 #define V4L2_CAMERA_HAL_METADATA_MENU_CONTROL_OPTIONS_H_ 19 20 #include <cerrno> 21 22 #include "common.h" 23 #include "control_options_interface.h" 24 #include "default_option_delegate.h" 25 26 namespace v4l2_camera_hal { 27 28 // MenuControlOptions offer a fixed list of acceptable values. 29 template <typename T> 30 class MenuControlOptions : public ControlOptionsInterface<T> { 31 public: 32 // |options| must be non-empty. MenuControlOptions(std::vector<T> options,std::shared_ptr<DefaultOptionDelegate<T>> defaults)33 MenuControlOptions(std::vector<T> options, 34 std::shared_ptr<DefaultOptionDelegate<T>> defaults) 35 : options_(options), defaults_(defaults){}; MenuControlOptions(std::vector<T> options,std::map<int,T> defaults)36 MenuControlOptions(std::vector<T> options, std::map<int, T> defaults) 37 : options_(options), 38 defaults_(std::make_shared<DefaultOptionDelegate<T>>(defaults)){}; 39 MetadataRepresentation()40 virtual std::vector<T> MetadataRepresentation() override { return options_; }; IsSupported(const T & option)41 virtual bool IsSupported(const T& option) override { 42 return (std::find(options_.begin(), options_.end(), option) != 43 options_.end()); 44 }; DefaultValueForTemplate(int template_type,T * default_value)45 virtual int DefaultValueForTemplate(int template_type, 46 T* default_value) override { 47 // Default to the first option. 48 if (options_.empty()) { 49 HAL_LOGE("Can't get default value, options are empty."); 50 return -ENODEV; 51 } 52 53 // Try to get it from the defaults delegate. 54 if (defaults_->DefaultValueForTemplate(template_type, default_value) && 55 IsSupported(*default_value)) { 56 return 0; 57 } 58 59 // Fall back to the first available. 60 *default_value = options_[0]; 61 return 0; 62 }; 63 64 private: 65 std::vector<T> options_; 66 std::shared_ptr<DefaultOptionDelegate<T>> defaults_; 67 }; 68 69 } // namespace v4l2_camera_hal 70 71 #endif // V4L2_CAMERA_HAL_METADATA_MENU_CONTROL_OPTIONS_H_ 72