CameraHardwareStub.h revision 08e83bb3b7cc41f603867acbeb1168019cf535fe 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#ifndef ANDROID_HARDWARE_CAMERA_HARDWARE_STUB_H
19#define ANDROID_HARDWARE_CAMERA_HARDWARE_STUB_H
20
21#include "FakeCamera.h"
22#include <utils/threads.h>
23#include <camera/CameraHardwareInterface.h>
24#include <binder/MemoryBase.h>
25#include <binder/MemoryHeapBase.h>
26#include <utils/threads.h>
27
28namespace android {
29
30class CameraHardwareStub : public CameraHardwareInterface {
31public:
32    virtual sp<IMemoryHeap> getPreviewHeap() const;
33    virtual sp<IMemoryHeap> getRawHeap() const;
34
35    virtual void        setCallbacks(notify_callback notify_cb,
36                                     data_callback data_cb,
37                                     data_callback_timestamp data_cb_timestamp,
38                                     void* user);
39
40    virtual void        enableMsgType(int32_t msgType);
41    virtual void        disableMsgType(int32_t msgType);
42    virtual bool        msgTypeEnabled(int32_t msgType);
43
44    virtual status_t    startPreview();
45    virtual void        stopPreview();
46    virtual bool        previewEnabled();
47
48    virtual status_t    startRecording();
49    virtual void        stopRecording();
50    virtual bool        recordingEnabled();
51    virtual void        releaseRecordingFrame(const sp<IMemory>& mem);
52
53    virtual status_t    autoFocus();
54    virtual status_t    cancelAutoFocus();
55    virtual status_t    takePicture();
56    virtual status_t    cancelPicture();
57    virtual status_t    dump(int fd, const Vector<String16>& args) const;
58    virtual status_t    setParameters(const CameraParameters& params);
59    virtual CameraParameters  getParameters() const;
60    virtual status_t    sendCommand(int32_t command, int32_t arg1,
61                                    int32_t arg2);
62    virtual void release();
63
64    static sp<CameraHardwareInterface> createInstance();
65
66private:
67                        CameraHardwareStub();
68    virtual             ~CameraHardwareStub();
69
70    static const int kBufferCount = 4;
71
72    class PreviewThread : public Thread {
73        CameraHardwareStub* mHardware;
74    public:
75        PreviewThread(CameraHardwareStub* hw) :
76#ifdef SINGLE_PROCESS
77            // In single process mode this thread needs to be a java thread,
78            // since we won't be calling through the binder.
79            Thread(true),
80#else
81            Thread(false),
82#endif
83              mHardware(hw) { }
84        virtual void onFirstRef() {
85            run("CameraPreviewThread", PRIORITY_URGENT_DISPLAY);
86        }
87        virtual bool threadLoop() {
88            mHardware->previewThread();
89            // loop until we need to quit
90            return true;
91        }
92    };
93
94    void initDefaultParameters();
95    void initHeapLocked();
96
97    int previewThread();
98
99    static int beginAutoFocusThread(void *cookie);
100    int autoFocusThread();
101
102    static int beginPictureThread(void *cookie);
103    int pictureThread();
104
105    mutable Mutex       mLock;
106
107    CameraParameters    mParameters;
108
109    sp<MemoryHeapBase>  mPreviewHeap;
110    sp<MemoryHeapBase>  mRawHeap;
111    sp<MemoryBase>      mBuffers[kBufferCount];
112
113    FakeCamera          *mFakeCamera;
114    bool                mPreviewRunning;
115    int                 mPreviewFrameSize;
116
117    // protected by mLock
118    sp<PreviewThread>   mPreviewThread;
119
120    notify_callback    mNotifyCb;
121    data_callback      mDataCb;
122    data_callback_timestamp mDataCbTimestamp;
123    void               *mCallbackCookie;
124
125    int32_t             mMsgEnabled;
126
127    // only used from PreviewThread
128    int                 mCurrentPreviewFrame;
129};
130
131}; // namespace android
132
133#endif
134