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_STATE_H_ 18 #define V4L2_CAMERA_HAL_METADATA_STATE_H_ 19 20 #include "../common.h" 21 #include "metadata_common.h" 22 #include "partial_metadata_interface.h" 23 #include "state_delegate_interface.h" 24 25 namespace v4l2_camera_hal { 26 27 // A State is a PartialMetadata that only has a single dynamic value. 28 template <typename T> 29 class State : public PartialMetadataInterface { 30 public: 31 State(int32_t tag, std::unique_ptr<StateDelegateInterface<T>> delegate) 32 : tag_(tag), delegate_(std::move(delegate)){}; 33 34 virtual std::vector<int32_t> StaticTags() const override { return {}; }; 35 virtual std::vector<int32_t> ControlTags() const override { return {}; }; 36 virtual std::vector<int32_t> DynamicTags() const override { return {tag_}; }; 37 38 virtual int PopulateStaticFields( 39 android::CameraMetadata* metadata) const override; 40 virtual int PopulateDynamicFields( 41 android::CameraMetadata* metadata) const override; 42 virtual int PopulateTemplateRequest( 43 int template_type, android::CameraMetadata* metadata) const override; 44 virtual bool SupportsRequestValues( 45 const android::CameraMetadata& metadata) const override; 46 virtual int SetRequestValues( 47 const android::CameraMetadata& metadata) override; 48 49 private: 50 int32_t tag_; 51 std::unique_ptr<StateDelegateInterface<T>> delegate_; 52 }; 53 54 // ----------------------------------------------------------------------------- 55 56 template <typename T> 57 int State<T>::PopulateStaticFields(android::CameraMetadata* metadata) const { 58 HAL_LOG_ENTER(); 59 return 0; 60 } 61 62 template <typename T> 63 int State<T>::PopulateDynamicFields(android::CameraMetadata* metadata) const { 64 HAL_LOG_ENTER(); 65 66 T value; 67 int res = delegate_->GetValue(&value); 68 if (res) { 69 return res; 70 } 71 return UpdateMetadata(metadata, tag_, value); 72 }; 73 74 template <typename T> 75 int State<T>::PopulateTemplateRequest(int template_type, 76 android::CameraMetadata* metadata) const { 77 HAL_LOG_ENTER(); 78 return 0; 79 }; 80 81 template <typename T> 82 bool State<T>::SupportsRequestValues( 83 const android::CameraMetadata& metadata) const { 84 HAL_LOG_ENTER(); 85 return true; 86 }; 87 88 template <typename T> 89 int State<T>::SetRequestValues(const android::CameraMetadata& metadata) { 90 HAL_LOG_ENTER(); 91 return 0; 92 }; 93 94 } // namespace v4l2_camera_hal 95 96 #endif // V4L2_CAMERA_HAL_METADATA_STATE_H_ 97
