camera/EmulatedCamera2.h - device/generic/goldfish - Git at Google

 /*
  * 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;

     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 */
	/*
	* 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;

	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 */