Camera.h revision 99617adda9bc46c43f511f0940bc735c73de61de 
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 IGraphicBufferProducer to the camera service
78            status_t    setPreviewTexture(const sp<IGraphicBufferProducer>& bufferProducer);
79
80            // start preview mode, must call setPreviewDisplay first
81            status_t    startPreview();
82
83            // stop preview mode
84            void        stopPreview();
85
86            // get preview state
87            bool        previewEnabled();
88
89            // start recording mode, must call setPreviewDisplay first
90            status_t    startRecording();
91
92            // stop recording mode
93            void        stopRecording();
94
95            // get recording state
96            bool        recordingEnabled();
97
98            // release a recording frame
99            void        releaseRecordingFrame(const sp<IMemory>& mem);
100
101            // autoFocus - status returned from callback
102            status_t    autoFocus();
103
104            // cancel auto focus
105            status_t    cancelAutoFocus();
106
107            // take a picture - picture returned from callback
108            status_t    takePicture(int msgType);
109
110            // set preview/capture parameters - key/value pairs
111            status_t    setParameters(const String8& params);
112
113            // get preview/capture parameters - key/value pairs
114            String8     getParameters() const;
115
116            // send command to camera driver
117            status_t    sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
118
119            // tell camera hal to store meta data or real YUV in video buffers.
120            status_t    storeMetaDataInBuffers(bool enabled);
121
122            void        setListener(const sp<CameraListener>& listener);
123            void        setRecordingProxyListener(const sp<ICameraRecordingProxyListener>& listener);
124            void        setPreviewCallbackFlags(int preview_callback_flag);
125
126            sp<ICameraRecordingProxy> getRecordingProxy();
127
128    // ICameraClient interface
129    virtual void        notifyCallback(int32_t msgType, int32_t ext, int32_t ext2);
130    virtual void        dataCallback(int32_t msgType, const sp<IMemory>& dataPtr,
131                                     camera_frame_metadata_t *metadata);
132    virtual void        dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
133
134    class RecordingProxy : public BnCameraRecordingProxy
135    {
136    public:
137        RecordingProxy(const sp<Camera>& camera);
138
139        // ICameraRecordingProxy interface
140        virtual status_t startRecording(const sp<ICameraRecordingProxyListener>& listener);
141        virtual void stopRecording();
142        virtual void releaseRecordingFrame(const sp<IMemory>& mem);
143
144    private:
145        sp<Camera>         mCamera;
146    };
147
148protected:
149                        Camera(int cameraId);
150                        Camera(const Camera&);
151                        Camera& operator=(const Camera);
152
153    sp<ICameraRecordingProxyListener>  mRecordingProxyListener;
154
155    friend class        CameraBase;
156};
157
158}; // namespace android
159
160#endif
161