1/*
2 * Copyright (C) 2011 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 HW_EMULATOR_CAMERA_EMULATED_QEMU_CAMERA_DEVICE_H
18#define HW_EMULATOR_CAMERA_EMULATED_QEMU_CAMERA_DEVICE_H
19
20/*
21 * Contains declaration of a class EmulatedQemuCameraDevice that encapsulates
22 * an emulated camera device connected to the host.
23 */
24
25#include "EmulatedCameraDevice.h"
26#include "QemuClient.h"
27
28namespace android {
29
30class EmulatedQemuCamera;
31
32/* Encapsulates an emulated camera device connected to the host.
33 */
34class EmulatedQemuCameraDevice : public EmulatedCameraDevice {
35public:
36    /* Constructs EmulatedQemuCameraDevice instance. */
37    explicit EmulatedQemuCameraDevice(EmulatedQemuCamera* camera_hal);
38
39    /* Destructs EmulatedQemuCameraDevice instance. */
40    ~EmulatedQemuCameraDevice();
41
42    /***************************************************************************
43     * Public API
44     **************************************************************************/
45
46public:
47    /* Initializes EmulatedQemuCameraDevice instance.
48     * Param:
49     *  device_name - Name of the camera device connected to the host. The name
50     *      that is used here must have been reported by the 'factory' camera
51     *      service when it listed camera devices connected to the host.
52     * Return:
53     *  NO_ERROR on success, or an appropriate error status.
54     */
55    status_t Initialize(const char* device_name);
56
57    /***************************************************************************
58     * Emulated camera device abstract interface implementation.
59     * See declarations of these methods in EmulatedCameraDevice class for
60     * information on each of these methods.
61     **************************************************************************/
62
63public:
64    /* Connects to the camera device. */
65    status_t connectDevice();
66
67    /* Disconnects from the camera device. */
68    status_t disconnectDevice();
69
70    /* Starts capturing frames from the camera device. */
71    status_t startDevice(int width, int height, uint32_t pix_fmt);
72
73    /* Stops capturing frames from the camera device. */
74    status_t stopDevice();
75
76    /***************************************************************************
77     * EmulatedCameraDevice virtual overrides
78     * See declarations of these methods in EmulatedCameraDevice class for
79     * information on each of these methods.
80     **************************************************************************/
81
82public:
83    /* Gets current preview fame into provided buffer.
84     * We override this method in order to provide preview frames cached in this
85     * object.
86     */
87    status_t getCurrentPreviewFrame(void* buffer);
88
89    /***************************************************************************
90     * Worker thread management overrides.
91     * See declarations of these methods in EmulatedCameraDevice class for
92     * information on each of these methods.
93     **************************************************************************/
94
95protected:
96    /* Implementation of the worker thread routine. */
97    bool inWorkerThread();
98
99    /***************************************************************************
100     * Qemu camera device data members
101     **************************************************************************/
102
103private:
104    /* Qemu client that is used to communicate with the 'emulated camera'
105     * service, created for this instance in the emulator. */
106    CameraQemuClient    mQemuClient;
107
108    /* Name of the camera device connected to the host. */
109    String8             mDeviceName;
110
111    /* Current preview framebuffer. */
112    uint32_t*           mPreviewFrame;
113
114    /* Emulated FPS (frames per second).
115     * We will emulate 50 FPS. */
116    static const int    mEmulatedFPS = 50;
117};
118
119}; /* namespace android */
120
121#endif  /* HW_EMULATOR_CAMERA_EMULATED_QEMU_CAMERA_DEVICE_H */
122