Camera.h revision b84d935c179a275a47e07291d2a983daf844de80 
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/IGraphicBufferProducer.h>
22#include <system/camera.h>
23#include <camera/ICameraClient.h>
24#include <camera/ICameraRecordingProxy.h>
25#include <camera/ICameraRecordingProxyListener.h>
26#include <camera/ICameraService.h>
27#include <camera/ICamera.h>
28#include <camera/CameraBase.h>
29
30namespace android {
31
32class Surface;
33class String8;
34class String16;
35
36// ref-counted object for callbacks
37class CameraListener: virtual public RefBase
38{
39public:
40    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2) = 0;
41    virtual void postData(int32_t msgType, const sp<IMemory>& dataPtr,
42                          camera_frame_metadata_t *metadata) = 0;
43    virtual void postDataTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) = 0;
44};
45
46class Camera;
47
48template <>
49struct CameraTraits<Camera>
50{
51    typedef CameraListener        TCamListener;
52    typedef ICamera               TCamUser;
53    typedef ICameraClient         TCamCallbacks;
54};
55
56class Camera :
57    public CameraBase<Camera>,
58    public BnCameraClient
59{
60public:
61    enum {
62        USE_CALLING_UID = ICameraService::USE_CALLING_UID
63    };
64
65            // construct a camera client from an existing remote
66    static  sp<Camera>  create(const sp<ICamera>& camera);
67    static  sp<Camera>  connect(int cameraId,
68                                const String16& clientPackageName,
69                                int clientUid);
70
71            virtual     ~Camera();
72
73            status_t    reconnect();
74            status_t    lock();
75            status_t    unlock();
76
77            // pass the buffered Surface to the camera service
78            status_t    setPreviewDisplay(const sp<Surface>& surface);
79
80            // pass the buffered IGraphicBufferProducer to the camera service
81            status_t    setPreviewTexture(const sp<IGraphicBufferProducer>& bufferProducer);
82
83            // start preview mode, must call setPreviewDisplay first
84            status_t    startPreview();
85
86            // stop preview mode
87            void        stopPreview();
88
89            // get preview state
90            bool        previewEnabled();
91
92            // start recording mode, must call setPreviewDisplay first
93            status_t    startRecording();
94
95            // stop recording mode
96            void        stopRecording();
97
98            // get recording state
99            bool        recordingEnabled();
100
101            // release a recording frame
102            void        releaseRecordingFrame(const sp<IMemory>& mem);
103
104            // autoFocus - status returned from callback
105            status_t    autoFocus();
106
107            // cancel auto focus
108            status_t    cancelAutoFocus();
109
110            // take a picture - picture returned from callback
111            status_t    takePicture(int msgType);
112
113            // set preview/capture parameters - key/value pairs
114            status_t    setParameters(const String8& params);
115
116            // get preview/capture parameters - key/value pairs
117            String8     getParameters() const;
118
119            // send command to camera driver
120            status_t    sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
121
122            // tell camera hal to store meta data or real YUV in video buffers.
123            status_t    storeMetaDataInBuffers(bool enabled);
124
125            void        setListener(const sp<CameraListener>& listener);
126            void        setRecordingProxyListener(const sp<ICameraRecordingProxyListener>& listener);
127            void        setPreviewCallbackFlags(int preview_callback_flag);
128
129            sp<ICameraRecordingProxy> getRecordingProxy();
130
131    // ICameraClient interface
132    virtual void        notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
133    virtual void        dataCallback(int32_t msgType, const sp<IMemory>& dataPtr,
134                                     camera_frame_metadata_t *metadata);
135    virtual void        dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
136
137    class RecordingProxy : public BnCameraRecordingProxy
138    {
139    public:
140        RecordingProxy(const sp<Camera>& camera);
141
142        // ICameraRecordingProxy interface
143        virtual status_t startRecording(const sp<ICameraRecordingProxyListener>& listener);
144        virtual void stopRecording();
145        virtual void releaseRecordingFrame(const sp<IMemory>& mem);
146
147    private:
148        sp<Camera>         mCamera;
149    };
150
151protected:
152                        Camera(int cameraId);
153                        Camera(const Camera&);
154                        Camera& operator=(const Camera);
155
156    sp<ICameraRecordingProxyListener>  mRecordingProxyListener;
157
158    friend class        CameraBase;
159};
160
161}; // namespace android
162
163#endif
164