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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef HW_EMULATOR_CAMERA_EMULATED_BASE_CAMERA_H
#define HW_EMULATOR_CAMERA_EMULATED_BASE_CAMERA_H
#include <hardware/camera_common.h>
#include <utils/Errors.h>
namespace android {
/*
* Contains declaration of a class EmulatedBaseCamera that encapsulates
* functionality common to all emulated camera device versions ("fake",
* "webcam", "video file", etc.). Instances of this class (for each emulated
* camera) are created during the construction of the EmulatedCameraFactory
* instance. This class serves as an entry point for all camera API calls that
* are common across all versions of the camera_device_t/camera_module_t
* structures.
*/
class EmulatedBaseCamera {
public:
EmulatedBaseCamera(int cameraId,
uint32_t cameraVersion,
struct hw_device_t* device,
struct hw_module_t* module);
virtual ~EmulatedBaseCamera();
/****************************************************************************
* Public API
***************************************************************************/
public:
/* Initializes EmulatedCamera instance.
* Return:
* NO_ERROR on success, or an appropriate error status on failure.
*/
virtual status_t Initialize() = 0;
/****************************************************************************
* Camera API implementation
***************************************************************************/
public:
/* Creates connection to the emulated camera device.
* This method is called in response to hw_module_methods_t::open callback.
* NOTE: When this method is called the object is locked.
* Note that failures in this method are reported as negative EXXX statuses.
*/
virtual status_t connectCamera(hw_device_t** device) = 0;
/* Plug the connection for the emulated camera. Until it's plugged in
* calls to connectCamera should fail with -ENODEV.
*/
virtual status_t plugCamera();
/* Unplug the connection from underneath the emulated camera.
* This is similar to closing the camera, except that
* all function calls into the camera device will return
* -EPIPE errors until the camera is reopened.
*/
virtual status_t unplugCamera();
virtual camera_device_status_t getHotplugStatus();
/* Closes connection to the emulated camera.
* This method is called in response to camera_device::close callback.
* NOTE: When this method is called the object is locked.
* Note that failures in this method are reported as negative EXXX statuses.
*/
virtual status_t closeCamera() = 0;
/* Gets camera information.
* This method is called in response to camera_module_t::get_camera_info
* callback.
* NOTE: When this method is called the object is locked.
* Note that failures in this method are reported as negative EXXX statuses.
*/
virtual status_t getCameraInfo(struct camera_info* info) = 0;
/****************************************************************************
* Data members
***************************************************************************/
protected:
/* Fixed camera information for camera2 devices. Must be valid to access if
* mCameraDeviceVersion is >= HARDWARE_DEVICE_API_VERSION(2,0) */
camera_metadata_t *mCameraInfo;
/* Zero-based ID assigned to this camera. */
int mCameraID;
private:
/* Version of the camera device HAL implemented by this camera */
int mCameraDeviceVersion;
};
} /* namespace android */
#endif /* HW_EMULATOR_CAMERA_EMULATED_BASE_CAMERA_H */
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