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 SYSTEM_CORE_INCLUDE_ANDROID_CAMERA_H 18 #define SYSTEM_CORE_INCLUDE_ANDROID_CAMERA_H 19 20 #include <stdint.h> 21 #include <sys/cdefs.h> 22 #include <sys/types.h> 23 #include <cutils/native_handle.h> 24 #include <hardware/hardware.h> 25 #include <hardware/gralloc.h> 26 27 __BEGIN_DECLS 28 29 /** 30 * A set of bit masks for specifying how the received preview frames are 31 * handled before the previewCallback() call. 32 * 33 * The least significant 3 bits of an "int" value are used for this purpose: 34 * 35 * ..... 0 0 0 36 * ^ ^ ^ 37 * | | |---------> determine whether the callback is enabled or not 38 * | |-----------> determine whether the callback is one-shot or not 39 * |-------------> determine whether the frame is copied out or not 40 * 41 * WARNING: When a frame is sent directly without copying, it is the frame 42 * receiver's responsiblity to make sure that the frame data won't get 43 * corrupted by subsequent preview frames filled by the camera. This flag is 44 * recommended only when copying out data brings significant performance price 45 * and the handling/processing of the received frame data is always faster than 46 * the preview frame rate so that data corruption won't occur. 47 * 48 * For instance, 49 * 1. 0x00 disables the callback. In this case, copy out and one shot bits 50 * are ignored. 51 * 2. 0x01 enables a callback without copying out the received frames. A 52 * typical use case is the Camcorder application to avoid making costly 53 * frame copies. 54 * 3. 0x05 is enabling a callback with frame copied out repeatedly. A typical 55 * use case is the Camera application. 56 * 4. 0x07 is enabling a callback with frame copied out only once. A typical 57 * use case is the Barcode scanner application. 58 */ 59 60 enum { 61 CAMERA_FRAME_CALLBACK_FLAG_ENABLE_MASK = 0x01, 62 CAMERA_FRAME_CALLBACK_FLAG_ONE_SHOT_MASK = 0x02, 63 CAMERA_FRAME_CALLBACK_FLAG_COPY_OUT_MASK = 0x04, 64 /** Typical use cases */ 65 CAMERA_FRAME_CALLBACK_FLAG_NOOP = 0x00, 66 CAMERA_FRAME_CALLBACK_FLAG_CAMCORDER = 0x01, 67 CAMERA_FRAME_CALLBACK_FLAG_CAMERA = 0x05, 68 CAMERA_FRAME_CALLBACK_FLAG_BARCODE_SCANNER = 0x07 69 }; 70 71 /** msgType in notifyCallback and dataCallback functions */ 72 enum { 73 CAMERA_MSG_ERROR = 0x0001, // notifyCallback 74 CAMERA_MSG_SHUTTER = 0x0002, // notifyCallback 75 CAMERA_MSG_FOCUS = 0x0004, // notifyCallback 76 CAMERA_MSG_ZOOM = 0x0008, // notifyCallback 77 CAMERA_MSG_PREVIEW_FRAME = 0x0010, // dataCallback 78 CAMERA_MSG_VIDEO_FRAME = 0x0020, // data_timestamp_callback 79 CAMERA_MSG_POSTVIEW_FRAME = 0x0040, // dataCallback 80 CAMERA_MSG_RAW_IMAGE = 0x0080, // dataCallback 81 CAMERA_MSG_COMPRESSED_IMAGE = 0x0100, // dataCallback 82 CAMERA_MSG_RAW_IMAGE_NOTIFY = 0x0200, // dataCallback 83 // Preview frame metadata. This can be combined with 84 // CAMERA_MSG_PREVIEW_FRAME in dataCallback. For example, the apps can 85 // request FRAME and METADATA. Or the apps can request only FRAME or only 86 // METADATA. 87 CAMERA_MSG_PREVIEW_METADATA = 0x0400, // dataCallback 88 CAMERA_MSG_ALL_MSGS = 0xFFFF 89 }; 90 91 /** cmdType in sendCommand functions */ 92 enum { 93 CAMERA_CMD_START_SMOOTH_ZOOM = 1, 94 CAMERA_CMD_STOP_SMOOTH_ZOOM = 2, 95 96 /** 97 * Set the clockwise rotation of preview display (setPreviewDisplay) in 98 * degrees. This affects the preview frames and the picture displayed after 99 * snapshot. This method is useful for portrait mode applications. Note 100 * that preview display of front-facing cameras is flipped horizontally 101 * before the rotation, that is, the image is reflected along the central 102 * vertical axis of the camera sensor. So the users can see themselves as 103 * looking into a mirror. 104 * 105 * This does not affect the order of byte array of 106 * CAMERA_MSG_PREVIEW_FRAME, CAMERA_MSG_VIDEO_FRAME, 107 * CAMERA_MSG_POSTVIEW_FRAME, CAMERA_MSG_RAW_IMAGE, or 108 * CAMERA_MSG_COMPRESSED_IMAGE. This is allowed to be set during preview 109 * since API level 14. 110 */ 111 CAMERA_CMD_SET_DISPLAY_ORIENTATION = 3, 112 113 /** 114 * cmdType to disable/enable shutter sound. In sendCommand passing arg1 = 115 * 0 will disable, while passing arg1 = 1 will enable the shutter sound. 116 */ 117 CAMERA_CMD_ENABLE_SHUTTER_SOUND = 4, 118 119 /* cmdType to play recording sound */ 120 CAMERA_CMD_PLAY_RECORDING_SOUND = 5, 121 122 /** 123 * Start the face detection. This should be called after preview is started. 124 * The camera will notify the listener of CAMERA_MSG_FACE and the detected 125 * faces in the preview frame. The detected faces may be the same as the 126 * previous ones. Apps should call CAMERA_CMD_STOP_FACE_DETECTION to stop 127 * the face detection. This method is supported if CameraParameters 128 * KEY_MAX_NUM_HW_DETECTED_FACES or KEY_MAX_NUM_SW_DETECTED_FACES is 129 * bigger than 0. Hardware and software face detection should not be running 130 * at the same time. If the face detection has started, apps should not send 131 * this again. 132 * 133 * In hardware face detection mode, CameraParameters KEY_WHITE_BALANCE, 134 * KEY_FOCUS_AREAS and KEY_METERING_AREAS have no effect. 135 * 136 * arg1 is the face detection type. It can be CAMERA_FACE_DETECTION_HW or 137 * CAMERA_FACE_DETECTION_SW. 138 */ 139 CAMERA_CMD_START_FACE_DETECTION = 6, 140 141 /** 142 * Stop the face detection. 143 */ 144 CAMERA_CMD_STOP_FACE_DETECTION = 7, 145 }; 146 147 /** camera fatal errors */ 148 enum { 149 CAMERA_ERROR_UNKNOWN = 1, 150 CAMERA_ERROR_SERVER_DIED = 100 151 }; 152 153 enum { 154 /** The facing of the camera is opposite to that of the screen. */ 155 CAMERA_FACING_BACK = 0, 156 /** The facing of the camera is the same as that of the screen. */ 157 CAMERA_FACING_FRONT = 1 158 }; 159 160 enum { 161 /** Hardware face detection. It does not use much CPU. */ 162 CAMERA_FACE_DETECTION_HW = 0, 163 /** 164 * Software face detection. It uses some CPU. Applications must use 165 * Camera.setPreviewTexture for preview in this mode. 166 */ 167 CAMERA_FACE_DETECTION_SW = 1 168 }; 169 170 /** 171 * The information of a face from camera face detection. 172 */ 173 typedef struct camera_face { 174 /** 175 * Bounds of the face [left, top, right, bottom]. (-1000, -1000) represents 176 * the top-left of the camera field of view, and (1000, 1000) represents the 177 * bottom-right of the field of view. The width and height cannot be 0 or 178 * negative. This is supported by both hardware and software face detection. 179 * 180 * The direction is relative to the sensor orientation, that is, what the 181 * sensor sees. The direction is not affected by the rotation or mirroring 182 * of CAMERA_CMD_SET_DISPLAY_ORIENTATION. 183 */ 184 int32_t rect[4]; 185 186 /** 187 * The confidence level of the face. The range is 1 to 100. 100 is the 188 * highest confidence. This is supported by both hardware and software 189 * face detection. 190 */ 191 int32_t score; 192 193 /** 194 * An unique id per face while the face is visible to the tracker. If 195 * the face leaves the field-of-view and comes back, it will get a new 196 * id. If the value is 0, id is not supported. 197 */ 198 int32_t id; 199 200 /** 201 * The coordinates of the center of the left eye. The range is -1000 to 202 * 1000. -2000, -2000 if this is not supported. 203 */ 204 int32_t left_eye[2]; 205 206 /** 207 * The coordinates of the center of the right eye. The range is -1000 to 208 * 1000. -2000, -2000 if this is not supported. 209 */ 210 int32_t right_eye[2]; 211 212 /** 213 * The coordinates of the center of the mouth. The range is -1000 to 1000. 214 * -2000, -2000 if this is not supported. 215 */ 216 int32_t mouth[2]; 217 218 } camera_face_t; 219 220 /** 221 * The metadata of the frame data. 222 */ 223 typedef struct camera_frame_metadata { 224 /** 225 * The number of detected faces in the frame. 226 */ 227 int32_t number_of_faces; 228 229 /** 230 * An array of the detected faces. The length is number_of_faces. 231 */ 232 camera_face_t *faces; 233 } camera_frame_metadata_t; 234 235 __END_DECLS 236 237 #endif /* SYSTEM_CORE_INCLUDE_ANDROID_CAMERA_H */ 238
