1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_HARDWARE_CAMERA_H
18#define ANDROID_HARDWARE_CAMERA_H
19
20#include <utils/Timers.h>
21#include <gui/ISurfaceTexture.h>
22#include <system/camera.h>
23#include <camera/ICameraClient.h>
24#include <camera/ICameraRecordingProxy.h>
25#include <camera/ICameraRecordingProxyListener.h>
26
27namespace android {
28
29struct CameraInfo {
30    /**
31     * The direction that the camera faces to. It should be CAMERA_FACING_BACK
32     * or CAMERA_FACING_FRONT.
33     */
34    int facing;
35
36    /**
37     * The orientation of the camera image. The value is the angle that the
38     * camera image needs to be rotated clockwise so it shows correctly on the
39     * display in its natural orientation. It should be 0, 90, 180, or 270.
40     *
41     * For example, suppose a device has a naturally tall screen. The
42     * back-facing camera sensor is mounted in landscape. You are looking at
43     * the screen. If the top side of the camera sensor is aligned with the
44     * right edge of the screen in natural orientation, the value should be
45     * 90. If the top side of a front-facing camera sensor is aligned with the
46     * right of the screen, the value should be 270.
47     */
48    int orientation;
49};
50
51class ICameraService;
52class ICamera;
53class Surface;
54class Mutex;
55class String8;
56
57// ref-counted object for callbacks
58class CameraListener: virtual public RefBase
59{
60public:
61    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
62    virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr,
63                          camera_frame_metadata_t *metadata) = 0;
64    virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0;
65};
66
67class Camera : public BnCameraClient, public IBinder::DeathRecipient
68{
69public:
70            // construct a camera client from an existing remote
71    static  sp<Camera>  create(const sp<ICamera>& camera);
72    static  int32_t     getNumberOfCameras();
73    static  status_t    getCameraInfo(int cameraId,
74                                      struct CameraInfo* cameraInfo);
75    static  sp<Camera>  connect(int cameraId);
76            virtual     ~Camera();
77            void        init();
78
79            status_t    reconnect();
80            void        disconnect();
81            status_t    lock();
82            status_t    unlock();
83
84            status_t    getStatus() { return mStatus; }
85
86            // pass the buffered Surface to the camera service
87            status_t    setPreviewDisplay(const sp<Surface>& surface);
88
89            // pass the buffered ISurfaceTexture to the camera service
90            status_t    setPreviewTexture(const sp<ISurfaceTexture>& surfaceTexture);
91
92            // start preview mode, must call setPreviewDisplay first
93            status_t    startPreview();
94
95            // stop preview mode
96            void        stopPreview();
97
98            // get preview state
99            bool        previewEnabled();
100
101            // start recording mode, must call setPreviewDisplay first
102            status_t    startRecording();
103
104            // stop recording mode
105            void        stopRecording();
106
107            // get recording state
108            bool        recordingEnabled();
109
110            // release a recording frame
111            void        releaseRecordingFrame(const sp<IMemory>& mem);
112
113            // autoFocus - status returned from callback
114            status_t    autoFocus();
115
116            // cancel auto focus
117            status_t    cancelAutoFocus();
118
119            // take a picture - picture returned from callback
120            status_t    takePicture(int msgType);
121
122            // set preview/capture parameters - key/value pairs
123            status_t    setParameters(const String8& params);
124
125            // get preview/capture parameters - key/value pairs
126            String8     getParameters() const;
127
128            // send command to camera driver
129            status_t    sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
130
131            // tell camera hal to store meta data or real YUV in video buffers.
132            status_t    storeMetaDataInBuffers(bool enabled);
133
134            void        setListener(const sp<CameraListener>& listener);
135            void        setRecordingProxyListener(const sp<ICameraRecordingProxyListener>& listener);
136            void        setPreviewCallbackFlags(int preview_callback_flag);
137
138            sp<ICameraRecordingProxy> getRecordingProxy();
139
140    // ICameraClient interface
141    virtual void        notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
142    virtual void        dataCallback(int32_t msgType, const sp<IMemory>& dataPtr,
143                                     camera_frame_metadata_t *metadata);
144    virtual void        dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
145
146    sp<ICamera>         remote();
147
148    class RecordingProxy : public BnCameraRecordingProxy
149    {
150    public:
151        RecordingProxy(const sp<Camera>& camera);
152
153        // ICameraRecordingProxy interface
154        virtual status_t startRecording(const sp<ICameraRecordingProxyListener>& listener);
155        virtual void stopRecording();
156        virtual void releaseRecordingFrame(const sp<IMemory>& mem);
157
158    private:
159        sp<Camera>         mCamera;
160    };
161
162private:
163                        Camera();
164                        Camera(const Camera&);
165                        Camera& operator=(const Camera);
166                        virtual void binderDied(const wp<IBinder>& who);
167
168            class DeathNotifier: public IBinder::DeathRecipient
169            {
170            public:
171                DeathNotifier() {
172                }
173
174                virtual void binderDied(const wp<IBinder>& who);
175            };
176
177            static sp<DeathNotifier> mDeathNotifier;
178
179            // helper function to obtain camera service handle
180            static const sp<ICameraService>& getCameraService();
181
182            sp<ICamera>         mCamera;
183            status_t            mStatus;
184
185            sp<CameraListener>  mListener;
186            sp<ICameraRecordingProxyListener>  mRecordingProxyListener;
187
188            friend class DeathNotifier;
189
190            static  Mutex               mLock;
191            static  sp<ICameraService>  mCameraService;
192};
193
194}; // namespace android
195
196#endif
197