210 lines
7.4 KiB
C++
Executable file
210 lines
7.4 KiB
C++
Executable file
/*
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* Copyright (C) 2011 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 HW_EMULATOR_CAMERA_EMULATED_CAMERA_FACTORY_H
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#define HW_EMULATOR_CAMERA_EMULATED_CAMERA_FACTORY_H
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#include <utils/RefBase.h>
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#include "EmulatedBaseCamera.h"
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#include "QemuClient.h"
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namespace android {
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struct EmulatedCameraHotplugThread;
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/*
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* Contains declaration of a class EmulatedCameraFactory that manages cameras
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* available for the emulation. A global instance of this class is statically
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* instantiated and initialized when camera emulation HAL is loaded.
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*/
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/* Class EmulatedCameraFactoryManages cameras available for the emulation.
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*
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* When the global static instance of this class is created on the module load,
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* it enumerates cameras available for the emulation by connecting to the
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* emulator's 'camera' service. For every camera found out there it creates an
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* instance of an appropriate class, and stores it an in array of emulated
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* cameras. In addition to the cameras reported by the emulator, a fake camera
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* emulator is always created, so there is always at least one camera that is
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* available.
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*
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* Instance of this class is also used as the entry point for the camera HAL API,
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* including:
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* - hw_module_methods_t::open entry point
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* - camera_module_t::get_number_of_cameras entry point
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* - camera_module_t::get_camera_info entry point
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*
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*/
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class EmulatedCameraFactory {
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public:
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/* Constructs EmulatedCameraFactory instance.
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* In this constructor the factory will create and initialize a list of
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* emulated cameras. All errors that occur on this constructor are reported
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* via mConstructedOK data member of this class.
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*/
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EmulatedCameraFactory();
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/* Destructs EmulatedCameraFactory instance. */
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~EmulatedCameraFactory();
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/****************************************************************************
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* Camera HAL API handlers.
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***************************************************************************/
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public:
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/* Opens (connects to) a camera device.
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* This method is called in response to hw_module_methods_t::open callback.
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*/
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int cameraDeviceOpen(int camera_id, hw_device_t** device);
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/* Gets emulated camera information.
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* This method is called in response to camera_module_t::get_camera_info callback.
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*/
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int getCameraInfo(int camera_id, struct camera_info *info);
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/* Sets emulated camera callbacks.
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* This method is called in response to camera_module_t::set_callbacks callback.
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*/
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int setCallbacks(const camera_module_callbacks_t *callbacks);
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/* Fill in vendor tags for the module
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* This method is called in response to camera_module_t::get_vendor_tag_ops callback.
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*/
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void getVendorTagOps(vendor_tag_ops_t* ops);
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/****************************************************************************
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* Camera HAL API callbacks.
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***************************************************************************/
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public:
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/* camera_module_t::get_number_of_cameras callback entry point. */
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static int get_number_of_cameras(void);
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/* camera_module_t::get_camera_info callback entry point. */
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static int get_camera_info(int camera_id, struct camera_info *info);
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/* camera_module_t::set_callbacks callback entry point. */
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static int set_callbacks(const camera_module_callbacks_t *callbacks);
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/* camera_module_t::get_vendor_tag_ops callback entry point */
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static void get_vendor_tag_ops(vendor_tag_ops_t* ops);
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/* camera_module_t::open_legacy callback entry point */
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static int open_legacy(const struct hw_module_t* module, const char* id,
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uint32_t halVersion, struct hw_device_t** device);
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private:
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/* hw_module_methods_t::open callback entry point. */
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static int device_open(const hw_module_t* module,
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const char* name,
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hw_device_t** device);
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/****************************************************************************
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* Public API.
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***************************************************************************/
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public:
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/* Gets fake camera orientation. */
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int getFakeCameraOrientation() {
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/* TODO: Have a boot property that controls that. */
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return 0;
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}
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/* Gets qemu camera orientation. */
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int getQemuCameraOrientation() {
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/* TODO: Have a boot property that controls that. */
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return 0;
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}
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/* Gets number of emulated cameras.
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*/
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int getEmulatedCameraNum() const {
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return mEmulatedCameraNum;
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}
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/* Checks whether or not the constructor has succeeded.
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*/
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bool isConstructedOK() const {
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return mConstructedOK;
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}
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void onStatusChanged(int cameraId, int newStatus);
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/****************************************************************************
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* Private API
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***************************************************************************/
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private:
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/* Populates emulated cameras array with cameras that are available via
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* 'camera' service in the emulator. For each such camera and instance of
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* the EmulatedCameraQemud will be created and added to the mEmulatedCameras
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* array.
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*/
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void createQemuCameras();
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/* Waits till qemu-props has done setup, timeout after 500ms */
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void waitForQemuSfFakeCameraPropertyAvailable();
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/* Checks if fake camera emulation is on for the camera facing back. */
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bool isBackFakeCameraEmulationOn();
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/* Gets camera device version number to use for back camera emulation */
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int getBackCameraHalVersion();
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/* Checks if fake camera emulation is on for the camera facing front. */
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bool isFrontFakeCameraEmulationOn();
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/* Gets camera device version number to use for front camera emulation */
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int getFrontCameraHalVersion();
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/****************************************************************************
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* Data members.
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***************************************************************************/
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private:
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/* Connection to the camera service in the emulator. */
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FactoryQemuClient mQemuClient;
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/* Array of cameras available for the emulation. */
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EmulatedBaseCamera** mEmulatedCameras;
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/* Number of emulated cameras (including the fake ones). */
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int mEmulatedCameraNum;
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/* Number of emulated fake cameras. */
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int mFakeCameraNum;
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/* Flags whether or not constructor has succeeded. */
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bool mConstructedOK;
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/* Camera callbacks (for status changing) */
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const camera_module_callbacks_t* mCallbacks;
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/* Hotplug thread (to call onStatusChanged) */
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sp<EmulatedCameraHotplugThread> mHotplugThread;
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public:
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/* Contains device open entry point, as required by HAL API. */
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static struct hw_module_methods_t mCameraModuleMethods;
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};
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}; /* namespace android */
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/* References the global EmulatedCameraFactory instance. */
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extern android::EmulatedCameraFactory gEmulatedCameraFactory;
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#endif /* HW_EMULATOR_CAMERA_EMULATED_CAMERA_FACTORY_H */
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