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      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 CAMERA_COMMON_1_0_CAMERAMODULE_H
     18 #define CAMERA_COMMON_1_0_CAMERAMODULE_H
     19 
     20 #include <hardware/camera.h>
     21 #include <utils/Mutex.h>
     22 #include <utils/KeyedVector.h>
     23 #include <utils/RefBase.h>
     24 
     25 #include "CameraMetadata.h"
     26 
     27 namespace android {
     28 namespace hardware {
     29 namespace camera {
     30 namespace common {
     31 namespace V1_0 {
     32 namespace helper {
     33 /**
     34  * A wrapper class for HAL camera module.
     35  *
     36  * This class wraps camera_module_t returned from HAL to provide a wrapped
     37  * get_camera_info implementation which CameraService generates some
     38  * camera characteristics keys defined in newer HAL version on an older HAL.
     39  */
     40 class CameraModule : public RefBase {
     41 public:
     42     explicit CameraModule(camera_module_t *module);
     43     virtual ~CameraModule();
     44 
     45     // Must be called after construction
     46     // Returns OK on success, NO_INIT on failure
     47     int init();
     48 
     49     int getCameraInfo(int cameraId, struct camera_info *info);
     50     int getDeviceVersion(int cameraId);
     51     int getNumberOfCameras(void);
     52     int open(const char* id, struct hw_device_t** device);
     53     bool isOpenLegacyDefined() const;
     54     int openLegacy(const char* id, uint32_t halVersion, struct hw_device_t** device);
     55     int setCallbacks(const camera_module_callbacks_t *callbacks);
     56     bool isVendorTagDefined() const;
     57     void getVendorTagOps(vendor_tag_ops_t* ops);
     58     bool isSetTorchModeSupported() const;
     59     int setTorchMode(const char* camera_id, bool enable);
     60     uint16_t getModuleApiVersion() const;
     61     const char* getModuleName() const;
     62     uint16_t getHalApiVersion() const;
     63     const char* getModuleAuthor() const;
     64     // Only used by CameraModuleFixture native test. Do NOT use elsewhere.
     65     void *getDso();
     66     // Only used by CameraProvider
     67     void removeCamera(int cameraId);
     68 
     69 private:
     70     // Derive camera characteristics keys defined after HAL device version
     71     static void deriveCameraCharacteristicsKeys(uint32_t deviceVersion, CameraMetadata &chars);
     72     // Helper function to append available[request|result|chars]Keys
     73     static void appendAvailableKeys(CameraMetadata &chars,
     74             int32_t keyTag, const Vector<int32_t>& appendKeys);
     75     status_t filterOpenErrorCode(status_t err);
     76     camera_module_t *mModule;
     77     KeyedVector<int, camera_info> mCameraInfoMap;
     78     KeyedVector<int, int> mDeviceVersionMap;
     79     Mutex mCameraInfoLock;
     80 };
     81 
     82 } // namespace helper
     83 } // namespace V1_0
     84 } // namespace common
     85 } // namespace camera
     86 } // namespace hardware
     87 } // namespace android
     88 
     89 #endif
     90