1 /* 2 * Copyright (C) 2019 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 HARDWARE_GOOGLE_CAMERA_HAL_HWL_INTERFACE_CAMERA_DEVICE_HWL_H_ 18 #define HARDWARE_GOOGLE_CAMERA_HAL_HWL_INTERFACE_CAMERA_DEVICE_HWL_H_ 19 20 #include <utils/Errors.h> 21 22 #include "camera_buffer_allocator_hwl.h" 23 #include "camera_device_session_hwl.h" 24 #include "hal_camera_metadata.h" 25 #include "hal_types.h" 26 #include "physical_camera_info_hwl.h" 27 #include "profiler.h" 28 29 namespace android { 30 namespace google_camera_hal { 31 32 // Camera device HWL, which is associated with a certain camera ID. The camera 33 // device can be a logical camera that contains multiple physical camera, or 34 // a single physical camera. It provides methods to query static information 35 // about the associated camera devices. It does not hold any states of the 36 // camera device. 37 class CameraDeviceHwl : public PhysicalCameraInfoHwl { 38 public: 39 virtual ~CameraDeviceHwl() = default; 40 41 // Get the camera ID of this camera device HWL. 42 virtual uint32_t GetCameraId() const = 0; 43 44 // Get the resource cost of this camera device HWL. 45 virtual status_t GetResourceCost(CameraResourceCost* cost) const = 0; 46 47 // Get the characteristics of this camera device HWL. 48 // characteristics will be filled by CameraDeviceHwl. 49 virtual status_t GetCameraCharacteristics( 50 std::unique_ptr<HalCameraMetadata>* characteristics) const = 0; 51 52 // For certain feature combinations, some keys in camera characteristics 53 // have more limited support range compared with that returned by 54 // GetCameraCharacterics. This function will return the limited values of the 55 // keys listed in CameraCharacteristics#getAvailableSessionCharacteristicsKeys 56 // for the input StreamConfiguration. 57 // 58 // stream_config includes the requested streams and session settings for 59 // which we are going to fetch the characteristics. 60 // 61 // session_characteristic will be filled with the session characteristics keys 62 // with their limited ranges. 63 virtual status_t GetSessionCharacteristics( 64 const StreamConfiguration& session_config, 65 std::unique_ptr<HalCameraMetadata>& characteristics) const = 0; 66 67 // Get the characteristics of the physical camera of this camera device. 68 // characteristics will be filled by CameraDeviceHwl. 69 virtual status_t GetPhysicalCameraCharacteristics( 70 uint32_t physical_camera_id, 71 std::unique_ptr<HalCameraMetadata>* characteristics) const = 0; 72 73 // Set the torch mode of the camera device. The torch mode status remains 74 // unchanged after this CameraDevice instance is destroyed. 75 virtual status_t SetTorchMode(TorchMode mode) = 0; 76 77 // Change the torch strength level of this camera device. If the torch is OFF 78 // and torchStrength > 0, then the torch will turn ON. TurnOnTorchWithStrengthLevel(int32_t)79 virtual status_t TurnOnTorchWithStrengthLevel(int32_t /*torch_strength*/) { 80 return UNKNOWN_TRANSACTION; 81 } 82 83 // Get the torch strength level of this camera device HWL. GetTorchStrengthLevel(int32_t &)84 virtual status_t GetTorchStrengthLevel(int32_t& /*torch_strength*/) const { 85 return UNKNOWN_TRANSACTION; 86 } 87 88 // Construct default request settings 89 virtual status_t ConstructDefaultRequestSettings( 90 RequestTemplate type, 91 std::unique_ptr<HalCameraMetadata>* request_settings) = 0; 92 93 // Dump the camera device states in fd, using dprintf() or write(). 94 virtual status_t DumpState(int fd) = 0; 95 96 // Create a camera device session for this device. This method will not be 97 // called before previous session has been destroyed. 98 // Created CameraDeviceSession remain valid even after this CameraDevice 99 // instance is destroyed. 100 // camera_allocator_hwl will be used by the HWL session when create HW 101 // pipeline, it should be valid during the lifetime of the HWL session. 102 virtual status_t CreateCameraDeviceSessionHwl( 103 CameraBufferAllocatorHwl* camera_allocator_hwl, 104 std::unique_ptr<CameraDeviceSessionHwl>* session) = 0; 105 106 // Query whether a particular streams configuration is supported. 107 // stream_config: It contains the stream info and session settings. 108 // check_settings: When check_settings is true, this function will check if 109 // the input session settings in stream_config is supported. The keys camera 110 // hwl has to scan for reporting support status is defined in framework by 111 // CameraCharacteristics#INFO_SESSION_CONFIGURATION_QUERY_VERSION. 112 virtual bool IsStreamCombinationSupported( 113 const StreamConfiguration& stream_config, 114 const bool check_settings) const = 0; 115 116 // Get customized profiler GetProfiler(uint32_t,int)117 virtual std::unique_ptr<google::camera_common::Profiler> GetProfiler( 118 uint32_t /* camera_id */, int /* option */) { 119 return nullptr; 120 } 121 }; 122 123 } // namespace google_camera_hal 124 } // namespace android 125 126 #endif // HARDWARE_GOOGLE_CAMERA_HAL_HWL_INTERFACE_CAMERA_DEVICE_HWL_H_ 127