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_TAGGED_CONTROL_OPTIONS_H_ 18 #define V4L2_CAMERA_HAL_METADATA_TAGGED_CONTROL_OPTIONS_H_ 19 20 #include <memory> 21 22 #include "control_options_interface.h" 23 24 namespace v4l2_camera_hal { 25 26 // A constant tag with a value not used as a real tag 27 // (since all real tags are unsigned), to indicate options 28 // that should not be reported. 29 // Any class working with TaggedControlOptions should check 30 // the tag against this value before using it. 31 static int32_t DO_NOT_REPORT_OPTIONS = -1; 32 33 // A TaggedControlOptions wraps a ControlOptions and adds a tag. 34 template <typename T> 35 class TaggedControlOptions : public ControlOptionsInterface<T> { 36 public: 37 TaggedControlOptions(int32_t tag, 38 std::unique_ptr<ControlOptionsInterface<T>> options) 39 : tag_(tag), options_(std::move(options)){}; 40 41 int32_t tag() { return tag_; }; 42 43 virtual std::vector<T> MetadataRepresentation() override { 44 return options_->MetadataRepresentation(); 45 }; 46 virtual bool IsSupported(const T& value) override { 47 return options_->IsSupported(value); 48 }; 49 virtual int DefaultValueForTemplate(int template_type, 50 T* default_value) override { 51 return options_->DefaultValueForTemplate(template_type, default_value); 52 } 53 54 private: 55 const int32_t tag_; 56 std::unique_ptr<ControlOptionsInterface<T>> options_; 57 }; 58 59 } // namespace v4l2_camera_hal 60 61 #endif // V4L2_CAMERA_HAL_METADATA_CONTROL_OPTIONS_INTERFACE_H_ 62
