282 lines
10 KiB
C++
Executable File
282 lines
10 KiB
C++
Executable File
/*
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* Copyright (C) 2008 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 ANDROID_HARDWARE_CAMERA_H
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#define ANDROID_HARDWARE_CAMERA_H
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#include <utils/Timers.h>
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#include <camera/ICameraClient.h>
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namespace android {
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class ISurface;
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/*
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* A set of bit masks for specifying how the received preview frames are
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* handled before the previewCallback() call.
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*
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* The least significant 3 bits of an "int" value are used for this purpose:
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*
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* ..... 0 0 0
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* ^ ^ ^
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* | | |---------> determine whether the callback is enabled or not
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* | |-----------> determine whether the callback is one-shot or not
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* |-------------> determine whether the frame is copied out or not
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*
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* WARNING:
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* When a frame is sent directly without copying, it is the frame receiver's
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* responsiblity to make sure that the frame data won't get corrupted by
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* subsequent preview frames filled by the camera. This flag is recommended
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* only when copying out data brings significant performance price and the
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* handling/processing of the received frame data is always faster than
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* the preview frame rate so that data corruption won't occur.
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*
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* For instance,
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* 1. 0x00 disables the callback. In this case, copy out and one shot bits
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* are ignored.
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* 2. 0x01 enables a callback without copying out the received frames. A
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* typical use case is the Camcorder application to avoid making costly
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* frame copies.
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* 3. 0x05 is enabling a callback with frame copied out repeatedly. A typical
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* use case is the Camera application.
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* 4. 0x07 is enabling a callback with frame copied out only once. A typical use
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* case is the Barcode scanner application.
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*/
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#define FRAME_CALLBACK_FLAG_ENABLE_MASK 0x01
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#define FRAME_CALLBACK_FLAG_ONE_SHOT_MASK 0x02
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#define FRAME_CALLBACK_FLAG_COPY_OUT_MASK 0x04
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// Typical use cases
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#define FRAME_CALLBACK_FLAG_NOOP 0x00
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#define FRAME_CALLBACK_FLAG_CAMCORDER 0x01
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#define FRAME_CALLBACK_FLAG_CAMERA 0x05
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#define FRAME_CALLBACK_FLAG_BARCODE_SCANNER 0x07
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// msgType in notifyCallback and dataCallback functions
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enum {
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CAMERA_MSG_ERROR = 0x001,
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CAMERA_MSG_SHUTTER = 0x002,
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CAMERA_MSG_FOCUS = 0x004,
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CAMERA_MSG_ZOOM = 0x008,
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CAMERA_MSG_PREVIEW_FRAME = 0x010,
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CAMERA_MSG_VIDEO_FRAME = 0x020,
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CAMERA_MSG_POSTVIEW_FRAME = 0x040,
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CAMERA_MSG_RAW_IMAGE = 0x080,
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CAMERA_MSG_COMPRESSED_IMAGE = 0x100,
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CAMERA_MSG_STATS_DATA = 0x200,
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CAMERA_MSG_META_DATA = 0x400,
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CAMERA_MSG_ALL_MSGS = 0x7FF
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};
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// cmdType in sendCommand functions
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enum {
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CAMERA_CMD_START_SMOOTH_ZOOM = 1,
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CAMERA_CMD_STOP_SMOOTH_ZOOM = 2,
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// Set the clockwise rotation of preview display (setPreviewDisplay) in
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// degrees. This affects the preview frames and the picture displayed after
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// snapshot. This method is useful for portrait mode applications. Note that
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// preview display of front-facing cameras is flipped horizontally before
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// the rotation, that is, the image is reflected along the central vertical
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// axis of the camera sensor. So the users can see themselves as looking
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// into a mirror.
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//
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// This does not affect the order of byte array of CAMERA_MSG_PREVIEW_FRAME,
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// CAMERA_MSG_VIDEO_FRAME, CAMERA_MSG_POSTVIEW_FRAME, CAMERA_MSG_RAW_IMAGE,
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// or CAMERA_MSG_COMPRESSED_IMAGE. This is not allowed to be set during
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// preview.
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CAMERA_CMD_SET_DISPLAY_ORIENTATION = 3,
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CAMERA_CMD_HISTOGRAM_ON = 4,
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CAMERA_CMD_HISTOGRAM_OFF = 5,
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CAMERA_CMD_HISTOGRAM_SEND_DATA = 6,
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CAMERA_CMD_FACE_DETECTION_ON = 7,
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CAMERA_CMD_FACE_DETECTION_OFF = 8,
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CAMERA_CMD_SEND_META_DATA = 9,
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};
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// camera fatal errors
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enum {
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CAMERA_ERROR_UKNOWN = 1,
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CAMERA_ERROR_RESOURCE = 2,
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CAMERA_ERROR_SERVER_DIED = 100
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};
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enum {
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CAMERA_FACING_BACK = 0, /* The facing of the camera is opposite to that of the screen. */
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CAMERA_FACING_FRONT = 1 /* The facing of the camera is the same as that of the screen. */
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};
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enum {
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CAMERA_SUPPORT_MODE_2D = 0x01, /* Camera Sensor supports 2D mode. */
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CAMERA_SUPPORT_MODE_3D = 0x02, /* Camera Sensor supports 3D mode. */
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CAMERA_SUPPORT_MODE_NONZSL = 0x04, /* Camera Sensor in NON-ZSL mode. */
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CAMERA_SUPPORT_MODE_ZSL = 0x08 /* Camera Sensor supports ZSL mode. */
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};
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struct CameraInfo {
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/**
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* The direction that the camera faces to. It should be
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* CAMERA_FACING_BACK or CAMERA_FACING_FRONT.
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*/
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int facing;
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int mode;
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/**
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* The orientation of the camera image. The value is the angle that the
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* camera image needs to be rotated clockwise so it shows correctly on
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* the display in its natural orientation. It should be 0, 90, 180, or 270.
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*
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* For example, suppose a device has a naturally tall screen. The
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* back-facing camera sensor is mounted in landscape. You are looking at
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* the screen. If the top side of the camera sensor is aligned with the
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* right edge of the screen in natural orientation, the value should be
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* 90. If the top side of a front-facing camera sensor is aligned with
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* the right of the screen, the value should be 270.
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*/
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int orientation;
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};
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class ICameraService;
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class ICamera;
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class Surface;
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class Mutex;
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class String8;
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// ref-counted object for callbacks
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class CameraListener: virtual public RefBase
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{
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public:
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virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
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virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr) = 0;
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virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0;
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};
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class Camera : public BnCameraClient, public IBinder::DeathRecipient
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{
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public:
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// construct a camera client from an existing remote
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static sp<Camera> create(const sp<ICamera>& camera);
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static int32_t getNumberOfCameras();
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static status_t getCameraInfo(int cameraId,
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struct CameraInfo* cameraInfo);
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static sp<Camera> connect(int cameraId, int mode=CAMERA_SUPPORT_MODE_2D);
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~Camera();
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void init();
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status_t reconnect();
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void disconnect();
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status_t lock();
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status_t unlock();
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status_t getStatus() { return mStatus; }
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// pass the buffered ISurface to the camera service
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status_t setPreviewDisplay(const sp<Surface>& surface);
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status_t setPreviewDisplay(const sp<ISurface>& surface);
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// query the recording buffer information from HAL layer.
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status_t getBufferInfo(sp<IMemory>& Frame, size_t *alignedSize);
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//encode the YUV data
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void encodeData();
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// start preview mode, must call setPreviewDisplay first
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status_t startPreview();
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// stop preview mode
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void stopPreview();
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// get preview state
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bool previewEnabled();
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// start recording mode, must call setPreviewDisplay first
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status_t startRecording();
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// stop recording mode
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void stopRecording();
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// get recording state
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bool recordingEnabled();
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// release a recording frame
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void releaseRecordingFrame(const sp<IMemory>& mem);
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// autoFocus - status returned from callback
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status_t autoFocus();
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// cancel auto focus
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status_t cancelAutoFocus();
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// take a picture - picture returned from callback
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status_t takePicture();
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// set preview/capture parameters - key/value pairs
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status_t setParameters(const String8& params);
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// get preview/capture parameters - key/value pairs
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String8 getParameters() const;
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// send command to camera driver
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status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
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void setListener(const sp<CameraListener>& listener);
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void setPreviewCallbackFlags(int preview_callback_flag);
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// ICameraClient interface
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virtual void notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
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virtual void dataCallback(int32_t msgType, const sp<IMemory>& dataPtr);
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virtual void dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
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sp<ICamera> remote();
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// start Livesnapshot, must be in recording mode
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status_t takeLiveSnapshot();
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private:
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Camera();
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Camera(const Camera&);
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Camera& operator=(const Camera);
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virtual void binderDied(const wp<IBinder>& who);
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class DeathNotifier: public IBinder::DeathRecipient
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{
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public:
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DeathNotifier() {
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}
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virtual void binderDied(const wp<IBinder>& who);
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};
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static sp<DeathNotifier> mDeathNotifier;
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// helper function to obtain camera service handle
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static const sp<ICameraService>& getCameraService();
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sp<ICamera> mCamera;
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status_t mStatus;
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sp<CameraListener> mListener;
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friend class DeathNotifier;
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static Mutex mLock;
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static sp<ICameraService> mCameraService;
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};
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}; // namespace android
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#endif
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