Camera 設定

環境：Freescale: imx6，android: 4.4.2, kernel: 3.0.35

定義前後鏡：
device/fsl/sabresd_6dq/init.rc

setprop back_camera_name ov5640_mipi
setprop back_camera_orient 0

setprop front_camera_name uvc,ov5642_camera,ov5640_camera
setprop front_camera_orient 0

hardware/imx/mx6/libcamera/CameraModule.cpp

#define FACE_BACK_CAMERA_NAME "back_camera_name"
#define FACE_FRONT_CAMERA_NAME "front_camera_name"
#define FACE_BACK_CAMERA_ORIENT "back_camera_orient"
#define FACE_FRONT_CAMERA_ORIENT "front_camera_orient"
#define UVC_NAME "uvc"

static void GetCameraPropery(char *pFaceBackCameraName,
                             char *pFaceFrontCameraName,
                             int  *pFaceBackOrient,
                             int  *pFaceFrontOrient)
{
    char orientStr[92];
     
    透過property_get，取得init.rc裡的設定
property_get(FACE_BACK_CAMERA_NAME,
                 pFaceBackCameraName,
                 DEFAULT_ERROR_NAME_str);
    property_get(FACE_BACK_CAMERA_ORIENT, orientStr, DEFAULT_ERROR_NAME_str);

    if (orientStr[0] == DEFAULT_ERROR_NAME)
        *pFaceBackOrient = 0;
    else
        *pFaceBackOrient = atoi(orientStr);

    ALOGI("Face Back Camera is %s, orient is %d",
          pFaceBackCameraName,
          *pFaceBackOrient);

    property_get(FACE_FRONT_CAMERA_NAME,
                 pFaceFrontCameraName,
                 DEFAULT_ERROR_NAME_str);

    property_get(FACE_FRONT_CAMERA_ORIENT, orientStr, DEFAULT_ERROR_NAME_str);
...
...
}