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1 | /* |
2 | * Copyright (C) 2012 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 | // FIXME: add well-defined names for cameras | |
18 | ||
19 | #ifndef ANDROID_INCLUDE_CAMERA_COMMON_H | |
20 | #define ANDROID_INCLUDE_CAMERA_COMMON_H | |
21 | ||
22 | #include <stdint.h> | |
23 | #include <sys/cdefs.h> | |
24 | #include <sys/types.h> | |
25 | #include <cutils/native_handle.h> | |
26 | #include <system/camera.h> | |
27 | #include <hardware/hardware.h> | |
28 | #include <hardware/gralloc.h> | |
29 | ||
30 | __BEGIN_DECLS | |
31 | ||
32 | /** | |
33 | * The id of this module | |
34 | */ | |
35 | #define CAMERA_HARDWARE_MODULE_ID "camera" | |
36 | ||
37 | /** | |
38 | * Module versioning information for the Camera hardware module, based on | |
39 | * camera_module_t.common.module_api_version. The two most significant hex | |
40 | * digits represent the major version, and the two least significant represent | |
41 | * the minor version. | |
42 | * | |
43 | ******************************************************************************* | |
44 | * Versions: 0.X - 1.X [CAMERA_MODULE_API_VERSION_1_0] | |
45 | * | |
46 | * Camera modules that report these version numbers implement the initial | |
47 | * camera module HAL interface. All camera devices openable through this | |
48 | * module support only version 1 of the camera device HAL. The device_version | |
49 | * and static_camera_characteristics fields of camera_info are not valid. Only | |
50 | * the android.hardware.Camera API can be supported by this module and its | |
51 | * devices. | |
52 | * | |
53 | ******************************************************************************* | |
54 | * Version: 2.0 [CAMERA_MODULE_API_VERSION_2_0] | |
55 | * | |
56 | * Camera modules that report this version number implement the second version | |
57 | * of the camera module HAL interface. Camera devices openable through this | |
58 | * module may support either version 1.0 or version 2.0 of the camera device | |
59 | * HAL interface. The device_version field of camera_info is always valid; the | |
60 | * static_camera_characteristics field of camera_info is valid if the | |
61 | * device_version field is 2.0 or higher. | |
62 | */ | |
63 | ||
64 | /** | |
65 | * Predefined macros for currently-defined version numbers | |
66 | */ | |
67 | ||
68 | /** | |
69 | * All module versions <= HARDWARE_MODULE_API_VERSION(1, 0xFF) must be treated | |
70 | * as CAMERA_MODULE_API_VERSION_1_0 | |
71 | */ | |
72 | #define CAMERA_MODULE_API_VERSION_1_0 HARDWARE_MODULE_API_VERSION(1, 0) | |
73 | #define CAMERA_MODULE_API_VERSION_2_0 HARDWARE_MODULE_API_VERSION(2, 0) | |
74 | ||
75 | #define CAMERA_MODULE_API_VERSION_CURRENT CAMERA_MODULE_API_VERSION_2_0 | |
76 | ||
77 | /** | |
78 | * All device versions <= HARDWARE_DEVICE_API_VERSION(1, 0xFF) must be treated | |
79 | * as CAMERA_DEVICE_API_VERSION_1_0 | |
80 | */ | |
81 | #define CAMERA_DEVICE_API_VERSION_1_0 HARDWARE_DEVICE_API_VERSION(1, 0) | |
82 | #define CAMERA_DEVICE_API_VERSION_2_0 HARDWARE_DEVICE_API_VERSION(2, 0) | |
83 | ||
84 | // Device version 2.0 is experimental | |
85 | #define CAMERA_DEVICE_API_VERSION_CURRENT CAMERA_DEVICE_API_VERSION_1_0 | |
86 | ||
87 | /** | |
88 | * Defined in /system/media/camera/include/system/camera_metadata.h | |
89 | */ | |
90 | typedef struct camera_metadata camera_metadata_t; | |
91 | ||
92 | struct camera_info { | |
93 | /** | |
94 | * The direction that the camera faces to. It should be CAMERA_FACING_BACK | |
95 | * or CAMERA_FACING_FRONT. | |
96 | * | |
97 | * Version information: | |
98 | * Valid in all camera_module versions | |
99 | */ | |
100 | int facing; | |
101 | ||
102 | /** | |
103 | * The orientation of the camera image. The value is the angle that the | |
104 | * camera image needs to be rotated clockwise so it shows correctly on the | |
105 | * display in its natural orientation. It should be 0, 90, 180, or 270. | |
106 | * | |
107 | * For example, suppose a device has a naturally tall screen. The | |
108 | * back-facing camera sensor is mounted in landscape. You are looking at | |
109 | * the screen. If the top side of the camera sensor is aligned with the | |
110 | * right edge of the screen in natural orientation, the value should be | |
111 | * 90. If the top side of a front-facing camera sensor is aligned with the | |
112 | * right of the screen, the value should be 270. | |
113 | * | |
114 | * Version information: | |
115 | * Valid in all camera_module versions | |
116 | */ | |
117 | int orientation; | |
118 | ||
119 | /** | |
120 | * The value of camera_device_t.common.version. | |
121 | * | |
122 | * Version information (based on camera_module_t.common.module_api_version): | |
123 | * | |
124 | * CAMERA_MODULE_API_VERSION_1_0: | |
125 | * | |
126 | * Not valid. Can be assumed to be CAMERA_DEVICE_API_VERSION_1_0. Do | |
127 | * not read this field. | |
128 | * | |
129 | * CAMERA_MODULE_API_VERSION_2_0: | |
130 | * | |
131 | * Always valid | |
132 | * | |
133 | */ | |
134 | uint32_t device_version; | |
135 | ||
136 | /** | |
137 | * The camera's fixed characteristics, which include all camera metadata in | |
138 | * the android.*.info.* sections. This should be a sorted metadata buffer, | |
139 | * and may not be modified or freed by the caller. The pointer should remain | |
140 | * valid for the lifetime of the camera module. | |
141 | * | |
142 | * Version information (based on camera_module_t.common.module_api_version): | |
143 | * | |
144 | * CAMERA_MODULE_API_VERSION_1_0: | |
145 | * | |
146 | * Not valid. Extra characteristics are not available. Do not read this | |
147 | * field. | |
148 | * | |
149 | * CAMERA_MODULE_API_VERSION_2_0: | |
150 | * | |
151 | * Valid if device_version >= CAMERA_DEVICE_API_VERSION_2_0. Do not read | |
152 | * otherwise. | |
153 | * | |
154 | */ | |
155 | const camera_metadata_t *static_camera_characteristics; | |
156 | }; | |
157 | ||
158 | typedef struct camera_module { | |
159 | hw_module_t common; | |
160 | int (*get_number_of_cameras)(void); | |
161 | int (*get_camera_info)(int camera_id, struct camera_info *info); | |
162 | } camera_module_t; | |
163 | ||
164 | __END_DECLS | |
165 | ||
166 | #endif /* ANDROID_INCLUDE_CAMERA_COMMON_H */ |