116 lines
4.0 KiB
C++
116 lines
4.0 KiB
C++
/*
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* Copyright (C) 2019 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef HARDWARE_GOOGLE_CAMERA_HAL_UTILS_CAMERA_ID_MANAGER_H_
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#define HARDWARE_GOOGLE_CAMERA_HAL_UTILS_CAMERA_ID_MANAGER_H_
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#include <utils/Errors.h>
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#include <memory>
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#include <string>
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#include <vector>
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#include "hal_types.h"
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namespace android {
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namespace google_camera_hal {
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using ::android::status_t;
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// Invalid camera ID
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constexpr uint32_t kInvalidCameraId = std::numeric_limits<uint32_t>::max();
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// Holds information about a camera's IDs
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struct CameraIdMap {
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// An unique camera ID. This should be the internal camera ID and does not
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// correspond to the public camera ID published to the camera framework
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uint32_t id = kInvalidCameraId;
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// Whether this camera ID is visible to camera framework.
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bool visible_to_framework = false;
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// physical_camera_ids contains the physical cameras underneath this logical
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// camera. If this logical camera does not contain multiple physical cameras,
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// physical_camera_ids should be empty.
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std::vector<uint32_t> physical_camera_ids;
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};
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// CameraIdManager manages public and internal camera IDs.
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// Internal camera IDs are the camera IDs assigned by CameraProviderHwl.
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// Public camera IDs are the camera IDs that camera framework sees.
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class CameraIdManager {
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public:
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// Create a CameraIdManager given a list of the internal camera info.
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// Public camera IDs are assigned to the visible cameras in the id_maps list
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// first, and then to the non-visible ones, in the same order that the id_maps
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// list is ordered
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static std::unique_ptr<CameraIdManager> Create(
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const std::vector<CameraIdMap>& id_maps);
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virtual ~CameraIdManager() = default;
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// Return the camera IDs that are visible to camera framework.
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std::vector<std::uint32_t> GetVisibleCameraIds() const;
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// Return camera IDs, including those that are not visible to the framework.
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std::vector<std::uint32_t> GetCameraIds() const;
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// Get the list of physical camera IDs for the given logical camera. Returns
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// an empty vector if the specified ID is a physical camera. The IDs are
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// public IDs as understood by the camera framework
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std::vector<std::uint32_t> GetPhysicalCameraIds(
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uint32_t public_camera_id) const;
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// Get the public camera ID of an internal camera ID.
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status_t GetPublicCameraId(uint32_t internal_camera_id,
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uint32_t* public_camera_id) const;
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// Get the internal camera ID of a public camera ID.
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status_t GetInternalCameraId(uint32_t public_camera_id,
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uint32_t* internal_camera_id) const;
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protected:
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CameraIdManager() = default;
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private:
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status_t Initialize(const std::vector<CameraIdMap>& id_maps);
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status_t ValidateInput(const std::vector<CameraIdMap>& id_maps);
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status_t ValidateMappedIds();
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void PrintCameraIdMapping();
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// Index is the public camera ID.
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// Value is the internal camera ID.
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std::vector<uint32_t> public_camera_internal_ids_;
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size_t visible_camera_count_ = 0;
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// Index is public camera ID.
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// Value is the list of physical camera IDs belonging to the device at this
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// index. Physical IDs in the list are in the public domain also.
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//
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// For a public camera ID:
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// physical_camera_ids_[public_logical_id] = { public_physical_id_list }
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// physical_camera_ids_[public_physical_id] = {}
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std::vector<std::vector<uint32_t>> physical_camera_ids_;
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};
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} // namespace google_camera_hal
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} // namespace android
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#endif // HARDWARE_GOOGLE_CAMERA_HAL_UTILS_CAMERA_ID_MANAGER_H_
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