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 */ 167
