path: root/v3/EmulatedQemuCameraDevice.h (plain)
blob: 8ef562b2a89c17b4bf2952b60437b3768f51a613

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
28	namespace android {
29
30	class EmulatedQemuCamera;
31
32	/* Encapsulates an emulated camera device connected to the host.
33	*/
34	class EmulatedQemuCameraDevice : public EmulatedCameraDevice {
35	public:
36	/* Constructs EmulatedQemuCameraDevice instance. */
37	explicit EmulatedQemuCameraDevice(EmulatedQemuCamera* camera_hal);
38
39	/* Destructs EmulatedQemuCameraDevice instance. */
40	~EmulatedQemuCameraDevice();
41
42	/***************************************************************************
43	* Public API
44	**************************************************************************/
45
46	public:
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
63	public:
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
82	public:
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
95	protected:
96	/* Implementation of the worker thread routine. */
97	bool inWorkerThread();
98
99	/***************************************************************************
100	* Qemu camera device data members
101	**************************************************************************/
102
103	private:
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