include/camera/Camera.h - LeafOS-Project/android_frameworks_base - Gitiles

 /*
  * Copyright (C) 2008 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 ANDROID_HARDWARE_CAMERA_H
 #define ANDROID_HARDWARE_CAMERA_H

 #include <utils/Timers.h>
 #include <camera/ICameraClient.h>

 namespace android {

 /*
  * A set of bit masks for specifying how the received preview frames are
  * handled before the previewCallback() call.
  *
  * The least significant 3 bits of an "int" value are used for this purpose:
  *
  * ..... 0 0 0
  *       ^ ^ ^
  *       | | |---------> determine whether the callback is enabled or not
  *       | |-----------> determine whether the callback is one-shot or not
  *       |-------------> determine whether the frame is copied out or not
  *
  * WARNING:
  * When a frame is sent directly without copying, it is the frame receiver's
  * responsiblity to make sure that the frame data won't get corrupted by
  * subsequent preview frames filled by the camera. This flag is recommended
  * only when copying out data brings significant performance price and the
  * handling/processing of the received frame data is always faster than
  * the preview frame rate so that data corruption won't occur.
  *
  * For instance,
  * 1. 0x00 disables the callback. In this case, copy out and one shot bits
  *    are ignored.
  * 2. 0x01 enables a callback without copying out the received frames. A
  *    typical use case is the Camcorder application to avoid making costly
  *    frame copies.
  * 3. 0x05 is enabling a callback with frame copied out repeatedly. A typical
  *    use case is the Camera application.
  * 4. 0x07 is enabling a callback with frame copied out only once. A typical use
  *    case is the Barcode scanner application.
  */
 #define FRAME_CALLBACK_FLAG_ENABLE_MASK              0x01
 #define FRAME_CALLBACK_FLAG_ONE_SHOT_MASK            0x02
 #define FRAME_CALLBACK_FLAG_COPY_OUT_MASK            0x04

 // Typical use cases
 #define FRAME_CALLBACK_FLAG_NOOP                     0x00
 #define FRAME_CALLBACK_FLAG_CAMCORDER                0x01
 #define FRAME_CALLBACK_FLAG_CAMERA                   0x05
 #define FRAME_CALLBACK_FLAG_BARCODE_SCANNER          0x07

 // msgType in notifyCallback and dataCallback functions
 enum {
     CAMERA_MSG_ERROR            = 0x001,
     CAMERA_MSG_SHUTTER          = 0x002,
     CAMERA_MSG_FOCUS            = 0x004,
     CAMERA_MSG_ZOOM             = 0x008,
     CAMERA_MSG_PREVIEW_FRAME    = 0x010,
     CAMERA_MSG_VIDEO_FRAME      = 0x020,
     CAMERA_MSG_POSTVIEW_FRAME   = 0x040,
     CAMERA_MSG_RAW_IMAGE        = 0x080,
     CAMERA_MSG_COMPRESSED_IMAGE = 0x100,
     CAMERA_MSG_ALL_MSGS         = 0x1FF
 };

 // cmdType in sendCommand functions
 enum {
     CAMERA_CMD_START_SMOOTH_ZOOM     = 1,
     CAMERA_CMD_STOP_SMOOTH_ZOOM      = 2,
     CAMERA_CMD_SET_DISPLAY_ORIENTATION = 3,

     // cmdType to disable/enable shutter sound.
     // In sendCommand passing arg1 = 0 will disable,
     // while passing arg1 = 1 will enable the shutter sound.
     CAMERA_CMD_ENABLE_SHUTTER_SOUND = 4,

     // cmdType to play recording sound.
     CAMERA_CMD_PLAY_RECORDING_SOUND = 5,
 };

 // camera fatal errors
 enum {
     CAMERA_ERROR_UKNOWN  = 1,
     CAMERA_ERROR_SERVER_DIED = 100
 };

 enum {
     CAMERA_FACING_BACK = 0,
     CAMERA_FACING_FRONT = 1 /* The camera faces to the user */
 };

 struct CameraInfo {

     /**
      * The direction that the camera faces to. It should be
      * CAMERA_FACING_BACK or CAMERA_FACING_FRONT.
      */
     int facing;

     /**
      * The orientation of the camera image. The value is the angle that the
      * camera image needs to be rotated clockwise so it shows correctly on
      * the display in its natural orientation. It should be 0, 90, 180, or 270.
      *
      * For example, suppose a device has a naturally tall screen, but the camera
      * sensor is mounted in landscape. If the top side of the camera sensor is
      * aligned with the right edge of the display in natural orientation, the
      * value should be 90.
      */
     int orientation;
 };

 class ICameraService;
 class ICamera;
 class Surface;
 class Mutex;
 class String8;

 // ref-counted object for callbacks
 class CameraListener: virtual public RefBase
 {
 public:
     virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
     virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr) = 0;
     virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0;
 };

 class Camera : public BnCameraClient, public IBinder::DeathRecipient
 {
 public:
             // construct a camera client from an existing remote
     static  sp<Camera>  create(const sp<ICamera>& camera);
     static  int32_t     getNumberOfCameras();
     static  status_t    getCameraInfo(int cameraId,
                                       struct CameraInfo* cameraInfo);
     static  sp<Camera>  connect(int cameraId);
                         ~Camera();
             void        init();

             status_t    reconnect();
             void        disconnect();
             status_t    lock();
             status_t    unlock();

             status_t    getStatus() { return mStatus; }

             // pass the buffered Surface to the camera service
             status_t    setPreviewDisplay(const sp<Surface>& surface);

             // start preview mode, must call setPreviewDisplay first
             status_t    startPreview();

             // stop preview mode
             void        stopPreview();

             // get preview state
             bool        previewEnabled();

             // start recording mode, must call setPreviewDisplay first
             status_t    startRecording();

             // stop recording mode
             void        stopRecording();

             // get recording state
             bool        recordingEnabled();

             // release a recording frame
             void        releaseRecordingFrame(const sp<IMemory>& mem);

             // autoFocus - status returned from callback
             status_t    autoFocus();

             // cancel auto focus
             status_t    cancelAutoFocus();

             // take a picture - picture returned from callback
             status_t    takePicture();

             // set preview/capture parameters - key/value pairs
             status_t    setParameters(const String8& params);

             // get preview/capture parameters - key/value pairs
             String8     getParameters() const;

             // send command to camera driver
             status_t    sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);

             void        setListener(const sp<CameraListener>& listener);
             void        setPreviewCallbackFlags(int preview_callback_flag);

     // ICameraClient interface
     virtual void        notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
     virtual void        dataCallback(int32_t msgType, const sp<IMemory>& dataPtr);
     virtual void        dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);

     sp<ICamera>         remote();

 private:
                         Camera();
                         Camera(const Camera&);
                         Camera& operator=(const Camera);
                         virtual void binderDied(const wp<IBinder>& who);

             class DeathNotifier: public IBinder::DeathRecipient
             {
             public:
                 DeathNotifier() {
                 }

                 virtual void binderDied(const wp<IBinder>& who);
             };

             static sp<DeathNotifier> mDeathNotifier;

             // helper function to obtain camera service handle
             static const sp<ICameraService>& getCameraService();

             sp<ICamera>         mCamera;
             status_t            mStatus;

             sp<CameraListener>  mListener;

             friend class DeathNotifier;

             static  Mutex               mLock;
             static  sp<ICameraService>  mCameraService;

 };

 }; // namespace android

 #endif
	/*
	* Copyright (C) 2008 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 ANDROID_HARDWARE_CAMERA_H
	#define ANDROID_HARDWARE_CAMERA_H

	#include <utils/Timers.h>
	#include <camera/ICameraClient.h>

	namespace android {

	/*
	* A set of bit masks for specifying how the received preview frames are
	* handled before the previewCallback() call.
	*
	* The least significant 3 bits of an "int" value are used for this purpose:
	*
	* ..... 0 0 0
	* ^ ^ ^
	* \| \| \|---------> determine whether the callback is enabled or not
	* \| \|-----------> determine whether the callback is one-shot or not
	* \|-------------> determine whether the frame is copied out or not
	*
	* WARNING:
	* When a frame is sent directly without copying, it is the frame receiver's
	* responsiblity to make sure that the frame data won't get corrupted by
	* subsequent preview frames filled by the camera. This flag is recommended
	* only when copying out data brings significant performance price and the
	* handling/processing of the received frame data is always faster than
	* the preview frame rate so that data corruption won't occur.
	*
	* For instance,
	* 1. 0x00 disables the callback. In this case, copy out and one shot bits
	* are ignored.
	* 2. 0x01 enables a callback without copying out the received frames. A
	* typical use case is the Camcorder application to avoid making costly
	* frame copies.
	* 3. 0x05 is enabling a callback with frame copied out repeatedly. A typical
	* use case is the Camera application.
	* 4. 0x07 is enabling a callback with frame copied out only once. A typical use
	* case is the Barcode scanner application.
	*/
	#define FRAME_CALLBACK_FLAG_ENABLE_MASK 0x01
	#define FRAME_CALLBACK_FLAG_ONE_SHOT_MASK 0x02
	#define FRAME_CALLBACK_FLAG_COPY_OUT_MASK 0x04

	// Typical use cases
	#define FRAME_CALLBACK_FLAG_NOOP 0x00
	#define FRAME_CALLBACK_FLAG_CAMCORDER 0x01
	#define FRAME_CALLBACK_FLAG_CAMERA 0x05
	#define FRAME_CALLBACK_FLAG_BARCODE_SCANNER 0x07

	// msgType in notifyCallback and dataCallback functions
	enum {
	CAMERA_MSG_ERROR = 0x001,
	CAMERA_MSG_SHUTTER = 0x002,
	CAMERA_MSG_FOCUS = 0x004,
	CAMERA_MSG_ZOOM = 0x008,
	CAMERA_MSG_PREVIEW_FRAME = 0x010,
	CAMERA_MSG_VIDEO_FRAME = 0x020,
	CAMERA_MSG_POSTVIEW_FRAME = 0x040,
	CAMERA_MSG_RAW_IMAGE = 0x080,
	CAMERA_MSG_COMPRESSED_IMAGE = 0x100,
	CAMERA_MSG_ALL_MSGS = 0x1FF
	};

	// cmdType in sendCommand functions
	enum {
	CAMERA_CMD_START_SMOOTH_ZOOM = 1,
	CAMERA_CMD_STOP_SMOOTH_ZOOM = 2,
	CAMERA_CMD_SET_DISPLAY_ORIENTATION = 3,

	// cmdType to disable/enable shutter sound.
	// In sendCommand passing arg1 = 0 will disable,
	// while passing arg1 = 1 will enable the shutter sound.
	CAMERA_CMD_ENABLE_SHUTTER_SOUND = 4,

	// cmdType to play recording sound.
	CAMERA_CMD_PLAY_RECORDING_SOUND = 5,
	};

	// camera fatal errors
	enum {
	CAMERA_ERROR_UKNOWN = 1,
	CAMERA_ERROR_SERVER_DIED = 100
	};

	enum {
	CAMERA_FACING_BACK = 0,
	CAMERA_FACING_FRONT = 1 /* The camera faces to the user */
	};

	struct CameraInfo {

	/**
	* The direction that the camera faces to. It should be
	* CAMERA_FACING_BACK or CAMERA_FACING_FRONT.
	*/
	int facing;

	/**
	* The orientation of the camera image. The value is the angle that the
	* camera image needs to be rotated clockwise so it shows correctly on
	* the display in its natural orientation. It should be 0, 90, 180, or 270.
	*
	* For example, suppose a device has a naturally tall screen, but the camera
	* sensor is mounted in landscape. If the top side of the camera sensor is
	* aligned with the right edge of the display in natural orientation, the
	* value should be 90.
	*/
	int orientation;
	};

	class ICameraService;
	class ICamera;
	class Surface;
	class Mutex;
	class String8;

	// ref-counted object for callbacks
	class CameraListener: virtual public RefBase
	{
	public:
	virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
	virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr) = 0;
	virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0;
	};

	class Camera : public BnCameraClient, public IBinder::DeathRecipient
	{
	public:
	// construct a camera client from an existing remote
	static sp<Camera> create(const sp<ICamera>& camera);
	static int32_t getNumberOfCameras();
	static status_t getCameraInfo(int cameraId,
	struct CameraInfo* cameraInfo);
	static sp<Camera> connect(int cameraId);
	~Camera();
	void init();

	status_t reconnect();
	void disconnect();
	status_t lock();
	status_t unlock();

	status_t getStatus() { return mStatus; }

	// pass the buffered Surface to the camera service
	status_t setPreviewDisplay(const sp<Surface>& surface);

	// start preview mode, must call setPreviewDisplay first
	status_t startPreview();

	// stop preview mode
	void stopPreview();

	// get preview state
	bool previewEnabled();

	// start recording mode, must call setPreviewDisplay first
	status_t startRecording();

	// stop recording mode
	void stopRecording();

	// get recording state
	bool recordingEnabled();

	// release a recording frame
	void releaseRecordingFrame(const sp<IMemory>& mem);

	// autoFocus - status returned from callback
	status_t autoFocus();

	// cancel auto focus
	status_t cancelAutoFocus();

	// take a picture - picture returned from callback
	status_t takePicture();

	// set preview/capture parameters - key/value pairs
	status_t setParameters(const String8& params);

	// get preview/capture parameters - key/value pairs
	String8 getParameters() const;

	// send command to camera driver
	status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);

	void setListener(const sp<CameraListener>& listener);
	void setPreviewCallbackFlags(int preview_callback_flag);

	// ICameraClient interface
	virtual void notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
	virtual void dataCallback(int32_t msgType, const sp<IMemory>& dataPtr);
	virtual void dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);

	sp<ICamera> remote();

	private:
	Camera();
	Camera(const Camera&);
	Camera& operator=(const Camera);
	virtual void binderDied(const wp<IBinder>& who);

	class DeathNotifier: public IBinder::DeathRecipient
	{
	public:
	DeathNotifier() {
	}

	virtual void binderDied(const wp<IBinder>& who);
	};

	static sp<DeathNotifier> mDeathNotifier;

	// helper function to obtain camera service handle
	static const sp<ICameraService>& getCameraService();

	sp<ICamera> mCamera;
	status_t mStatus;

	sp<CameraListener> mListener;

	friend class DeathNotifier;

	static Mutex mLock;
	static sp<ICameraService> mCameraService;

	};

	}; // namespace android

	#endif