/*
* 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_CAMERA2_H
#define HW_EMULATOR_CAMERA_EMULATED_CAMERA2_H
/*
* Contains declaration of a class EmulatedCamera that encapsulates
* functionality common to all version 2.0 emulated camera devices. 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 defined by camera2_device_ops_t API.
*/
#include "hardware/camera2.h"
#include "system/camera_metadata.h"
#include "EmulatedBaseCamera.h"
#include <utils/Thread.h>
#include <utils/Mutex.h>
namespace android {
/* Encapsulates functionality common to all version 2.0 emulated camera devices
*
* Note that EmulatedCameraFactory instantiates object of this class just once,
* when EmulatedCameraFactory instance gets constructed. Connection to /
* disconnection from the actual camera device is handled by calls to
* connectDevice(), and closeCamera() methods of this class that are invoked in
* response to hw_module_methods_t::open, and camera_device::close callbacks.
*/
class EmulatedCamera2 : public camera2_device, public EmulatedBaseCamera {
public:
/* Constructs EmulatedCamera2 instance.
* Param:
* cameraId - Zero based camera identifier, which is an index of the camera
* instance in camera factory's array.
* module - Emulated camera HAL module descriptor.
*/
EmulatedCamera2(int cameraId,
struct hw_module_t* module);
/* Destructs EmulatedCamera2 instance. */
virtual ~EmulatedCamera2();
/****************************************************************************
* Abstract API
***************************************************************************/
public:
/****************************************************************************
* Public API
***************************************************************************/
public:
virtual status_t Initialize();
/****************************************************************************
* Camera module API and generic hardware device API implementation
***************************************************************************/
public:
virtual status_t connectCamera(hw_device_t** device);
virtual status_t closeCamera();
virtual status_t getCameraInfo(struct camera_info* info) = 0;
/****************************************************************************
* Camera API implementation.
* These methods are called from the camera API callback routines.
***************************************************************************/
protected:
/** Request input queue notification */
virtual int requestQueueNotify();
/** Count of requests in flight */
virtual int getInProgressCount();
/** Cancel all captures in flight */
virtual int flushCapturesInProgress();
virtual int constructDefaultRequest(
int request_template,
camera_metadata_t **request);
/** Output stream creation and management */
virtual int allocateStream(
uint32_t width,
uint32_t height,
int format,
const camera2_stream_ops_t *stream_ops,
uint32_t *stream_id,
uint32_t *format_actual,
uint32_t *usage,
uint32_t *max_buffers);
virtual int registerStreamBuffers(
uint32_t stream_id,
int num_buffers,
buffer_handle_t *buffers);
virtual int releaseStream(uint32_t stream_id);
/** Input stream creation and management */
virtual int allocateReprocessStream(
uint32_t width,
uint32_t height,
uint32_t format,
const camera2_stream_in_ops_t *reprocess_stream_ops,
uint32_t *stream_id,
uint32_t *consumer_usage,
uint32_t *max_buffers);
virtual int allocateReprocessStreamFromStream(
uint32_t output_stream_id,
const camera2_stream_in_ops_t *reprocess_stream_ops,
uint32_t *stream_id);
virtual int releaseReprocessStream(uint32_t stream_id);
/** 3A action triggering */
virtual int triggerAction(uint32_t trigger_id,
int32_t ext1, int32_t ext2);
/** Custom tag definitions */
virtual const char* getVendorSectionName(uint32_t tag);
virtual const char* getVendorTagName(uint32_t tag);
virtual int getVendorTagType(uint32_t tag);
/** Debug methods */
virtual int dump(int fd);
/****************************************************************************
* Camera API callbacks as defined by camera2_device_ops structure. See
* hardware/libhardware/include/hardware/camera2.h for information on each
* of these callbacks. Implemented in this class, these callbacks simply
* dispatch the call into an instance of EmulatedCamera2 class defined in
* the 'camera_device2' parameter.
***************************************************************************/
private:
/** Input request queue */
static int set_request_queue_src_ops(const camera2_device_t *,
const camera2_request_queue_src_ops *queue_src_ops);
static int notify_request_queue_not_empty(const camera2_device_t *);
/** Output frame queue */
static int set_frame_queue_dst_ops(const camera2_device_t *,
const camera2_frame_queue_dst_ops *queue_dst_ops);
/** In-progress request management */
static int get_in_progress_count(const camera2_device_t *);
static int flush_captures_in_progress(const camera2_device_t *);
/** Request template creation */
static int construct_default_request(const camera2_device_t *,
int request_template,
camera_metadata_t **request);
/** Stream management */
static int allocate_stream(const camera2_device_t *,
uint32_t width,
uint32_t height,
int format,
const camera2_stream_ops_t *stream_ops,
uint32_t *stream_id,
uint32_t *format_actual,
uint32_t *usage,
uint32_t *max_buffers);
static int register_stream_buffers(const camera2_device_t *,
uint32_t stream_id,
int num_buffers,
buffer_handle_t *buffers);
static int release_stream(const camera2_device_t *,
uint32_t stream_id);
static int allocate_reprocess_stream(const camera2_device_t *,
uint32_t width,
uint32_t height,
uint32_t format,
const camera2_stream_in_ops_t *reprocess_stream_ops,
uint32_t *stream_id,
uint32_t *consumer_usage,
uint32_t *max_buffers);
static int allocate_reprocess_stream_from_stream(const camera2_device_t *,
uint32_t output_stream_id,
const camera2_stream_in_ops_t *reprocess_stream_ops,
uint32_t *stream_id);
static int release_reprocess_stream(const camera2_device_t *,
uint32_t stream_id);
/** 3A triggers*/
static int trigger_action(const camera2_device_t *,
uint32_t trigger_id,
int ext1,
int ext2);
/** Notifications to application */
static int set_notify_callback(const camera2_device_t *,
camera2_notify_callback notify_cb,
void *user);
/** Vendor metadata registration */
static int get_metadata_vendor_tag_ops(const camera2_device_t *,
vendor_tag_query_ops_t **ops);
// for get_metadata_vendor_tag_ops
static const char* get_camera_vendor_section_name(
const vendor_tag_query_ops_t *,
uint32_t tag);
static const char* get_camera_vendor_tag_name(
const vendor_tag_query_ops_t *,
uint32_t tag);
static int get_camera_vendor_tag_type(
const vendor_tag_query_ops_t *,
uint32_t tag);
static int dump(const camera2_device_t *, int fd);
/** For hw_device_t ops */
static int close(struct hw_device_t* device);
/****************************************************************************
* Data members shared with implementations
***************************************************************************/
protected:
/** Mutex for calls through camera2 device interface */
Mutex mMutex;
bool mStatusPresent;
const camera2_request_queue_src_ops *mRequestQueueSrc;
const camera2_frame_queue_dst_ops *mFrameQueueDst;
struct TagOps : public vendor_tag_query_ops {
EmulatedCamera2 *parent;
};
TagOps mVendorTagOps;
void sendNotification(int32_t msgType,
int32_t ext1, int32_t ext2, int32_t ext3);
/****************************************************************************
* Data members
***************************************************************************/
private:
static camera2_device_ops_t sDeviceOps;
camera2_notify_callback mNotifyCb;
void* mNotifyUserPtr;
};
}; /* namespace android */
#endif /* HW_EMULATOR_CAMERA_EMULATED_CAMERA2_H */