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上一篇我们讲了：

Camera相机人脸识别系列专题分析之十一：人脸特征检测FFD算法之低功耗libvega_face.so人脸属性(年龄，性别，肤色，微笑，种族等)检测流程详解

        这一篇我们开始讲： Camera相机人脸识别系列专题分析之十二：人脸特征检测FFD算法之libvega_face.so数据结构详解

目录

一、背景

二、：FFD算法之libvega_face.so数据结构

    2.1：vega_face常规数据结构

    2.2 ：MTK平台FD数据结构

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一、背景

我们知道：软件 = 算法 + 数据结构，之前我们讲了FFD算法之libvega_face.so的流程，如果没有理解数据结构，也很难理解，这里汇总相关的数据结构，便于理解。

二、：FFD算法之libvega_face.so数据结构

    2.1：vega_face常规数据结构

主要涉及：

1. vega_face_model_type_t
2. vega_face_model_buffer_t
3. vega_face_init_param_t
4. vega_face_timestamp_t
5. vega_face_pixel_format_t
6. vega_face_orientation_t 人脸方向
7. vega_face_frame_t 人脸帧数据
8. vega_face_rect_t 人脸矩形
9. vega_face_points_layout_t
10. vega_face_points_t 人脸点位
11. vega_face_euler_angle_t 性别结构体
12. vega_face_classify_label_t
13. vega_face_attribute_t 人脸属性结构体
14. vega_face_track_mainface_config_t

#define VEGA_FACE_OK                    0
#define VEGA_FACE_E_UNSUPPORTED         -10000
#define VEGA_FACE_E_FAIL                -10001
#define VEGA_FACE_E_PARAM               -10002
#define VEGA_FACE_E_LICENSE             -10003
#define VEGA_FACE_E_HANDLE              -10004
#define VEGA_FACE_E_PARAM_INCAMPAT      -10005
#define VEGA_FACE_E_NOT_FOUND           -10006typedef int vega_face_errcode_t;typedef uint64_t vega_face_handle_t;#define VEGA_FACE_CONFIG_DEFAULT            0x00000000#define VEGA_FACE_CONFIG_RESIZE_IMG_320W    0x00000001
#define VEGA_FACE_CONFIG_RESIZE_IMG_480W    0x00000002
#define VEGA_FACE_CONFIG_RESIZE_IMG_640W    0x00000003
#define VEGA_FACE_CONFIG_RESIZE_IMG_720W    0x00000004
#define VEGA_FACE_CONFIG_RESIZE_IMG_960W    0x00000005
#define VEGA_FACE_CONFIG_RESIZE_IMG_1080W   0x00000006
#define VEGA_FACE_CONFIG_RESIZE_IMG_1280W   0x00000007#define VEGA_FACE_CONFIG_TRACK_TWO_THREAD   0x00000100
#define VEGA_FACE_CONFIG_BYPASS             0x00000200#define VEGA_FACE_CONFIG_ALIGN_2D_137       0x00010000
#define VEGA_FACE_CONFIG_ALIGN_2D_285       0x00020000typedef uint64_t vega_face_config_t;typedef enum {VEGA_FACE_DETECT_MODEL    = 0,VEGA_FACE_TRACK_MODEL     = 1,VEGA_FACE_ALIGN_MODEL     = 2,VEGA_FACE_ATTRIBUTE_MODEL = 3,VEGA_FACE_MODEL_COUNT     = 8
} vega_face_model_type_t;typedef struct {const void *buffer;unsigned int buffer_size;
} vega_face_model_buffer_t;typedef struct {unsigned int struct_size;const char *model_path[VEGA_FACE_MODEL_COUNT];vega_face_model_buffer_t model_buffer[VEGA_FACE_MODEL_COUNT];vega_face_config_t config;
} vega_face_init_param_t;typedef struct {long int tv_sec;long int tv_usec;
} vega_face_timestamp_t;typedef enum {VEGA_FACE_PIX_FMT_GRAY8    = 0,VEGA_FACE_PIX_FMT_YUV420P  = 1,VEGA_FACE_PIX_FMT_NV12     = 2,VEGA_FACE_PIX_FMT_NV21     = 3,VEGA_FACE_PIX_FMT_BGRA8888 = 4,VEGA_FACE_PIX_FMT_BGR888   = 5,VEGA_FACE_PIX_FMT_RGBA8888 = 6,VEGA_FACE_PIX_FMT_RGB888   = 7
} vega_face_pixel_format_t;typedef enum {VEGA_FACE_UP      = 0,VEGA_FACE_LEFT    = 1,VEGA_FACE_DOWN    = 2,VEGA_FACE_RIGHT   = 3,VEGA_FACE_UNKNOWN = 4
} vega_face_orientation_t;typedef struct {unsigned int struct_size;unsigned int ID;vega_face_pixel_format_t pixel_format;const unsigned char *data;int width;int height;int stride;vega_face_orientation_t orientation;vega_face_timestamp_t time_stamp;
} vega_face_frame_t;typedef uint64_t vega_face_result_t;typedef uint64_t vega_face_faceinfo_t;typedef struct {float left;float top;float right;float bottom;
} vega_face_rect_t;typedef enum {VEGA_FACE_POINTS_LAYOUT_2D_XYXY = 0,VEGA_FACE_POINTS_LAYOUT_2D_XXYY = 1
} vega_face_points_layout_t;typedef struct {vega_face_points_layout_t layout;float *buf;unsigned int buf_size;
} vega_face_points_t;typedef struct {float yaw;float pitch;float roll;
} vega_face_euler_angle_t;typedef struct {int label;float score;
} vega_face_classify_label_t;typedef struct {float age;vega_face_classify_label_t gender;vega_face_classify_label_t race_yellow;vega_face_classify_label_t race_black;vega_face_classify_label_t race_white;vega_face_classify_label_t race_brown;
} vega_face_attribute_t;typedef struct {bool enable_main_face_mode;float mainface_track_target_replace_thresh;float mainface_detect_score_weight;float mainface_rect_area_weight;float mainface_center_distance_weight;
} vega_face_track_mainface_config_t;

    2.2 ：MTK平台FD数据结构

主要涉及写入meta，并传递给APP的参数结构：

1. FD_Frame_Parameters
2. oplusFaceDataAppJoint
3. thirdFfdPreviewAppData
4. thirdProcessData
5. thirdFfd_data_t
6. thirdFaceROIData
7. thirdRectangleCoordinate

enum HalFDMode_e {HAL_FD_MODE_FD = 0,HAL_FD_MODE_SD,HAL_FD_MODE_VFB,HAL_FD_MODE_CFB,HAL_FD_MODE_VSDOF,HAL_FD_MODE_MANUAL
} ;enum HalFDObject_e {HAL_FD_OBJ_NONE = 0,HAL_FD_OBJ_SW,HAL_FD_OBJ_HW,HAL_FD_OBJ_FDFT_SW,#ifdef third_FEATURE_CAMERA_COMMONHAL_FD_OBJ_CUSFD_SW,#endifHAL_FD_OBJ_UNKNOWN = 0xFF
} ;enum HalFDVersion_e {HAL_FD_VER_NONE = 0,HAL_FD_VER_HW36,HAL_FD_VER_HW37,HAL_FD_VER_SW36,HAL_FD_VER_HW40,HAL_FD_VER_HW41,HAL_FD_VER_HW42,HAL_FD_VER_HW43,HAL_FD_VER_HW50,HAL_FD_VER_HW51,HAL_FD_VER_HW52,
};struct FD_RESULT {MINT32 rect[4];MINT32 score = -1;MINT32 rop_dir = -1;MINT32 rip_dir = -1;
};struct FD_Frame_Parameters {MUINT8 *pScaleImages;MUINT8 *pRGB565Image;MUINT8 *pPureYImage;MUINT8 *pImageBufferPhyP0; // Plane 0 of preview image physical addressMUINT8 *pImageBufferPhyP1; // Plane 1 of preview image physical addressMUINT8 *pImageBufferPhyP2; // Plane 2 of preview image physical addressMUINT8 *pImageBufferVirtual;MINT32 Rotation_Info;MUINT8 SDEnable;MUINT8 AEStable;MUINT32 padding_w;MUINT32 padding_h;MINT32 gammaType;MINT32 LvValue;MINT32 MagicNum = 0;MUINT32 FD_Y;MUINT8 *pImageBufferY;NSCam::MSize sensorSize;void* imgBuffer;MINT32 frameNo;thirdSize thirdCusSensorSize;thirdFaceDataAppJoint faceData;
};#define thirdFD_MAX_FFD_NUM 137
#define thirdFD_MAX_FFD_NUM_296 296
#define thirdFD_MAX_FFD_NUM_512 512
#define thirdFD_MAX_ATTRI_FACE_NUM 4
#define thirdFD_RESERVE_ITEM 40
#define thirdFD_HSV_CHANNEL_NUM 3
#define thirdFD_MAX_FACE_ROIS 5
#define thirdFD_MAX_FD_NUM 15typedef struct {int32_t age[thirdFD_MAX_ATTRI_FACE_NUM];int32_t gender[thirdFD_MAX_ATTRI_FACE_NUM];int32_t feature[thirdFD_MAX_ATTRI_FACE_NUM];int32_t race[thirdFD_MAX_ATTRI_FACE_NUM];
} thirdAttributeResult;typedef struct {uint32_t   left;      ///< x coordinate of the ROIuint32_t   top;       ///< y coordinate of the ROIuint32_t   width;     ///< Width of the ROIuint32_t   height;    ///< Height of the ROI
} thirdRectangleCoordinate;/// @brief Describes Face ROI
typedef struct {uint32_t   id;           ///< Id used to track a face in the sceneuint32_t   confidence;   ///< Confidence of this facethirdRectangleCoordinate    faceRect;     ///< Detected Face rectangle
} thirdFaceROIData;typedef struct {int32_t x[thirdFD_MAX_FFD_NUM];int32_t y[thirdFD_MAX_FFD_NUM];int32_t occlusion[thirdFD_MAX_FFD_NUM];
} thirdFfd_data_t;typedef struct {int32_t versionId;int32_t face_num;int32_t master_index;int32_t points_count;int32_t age[thirdFD_MAX_FD_NUM];int32_t gender[thirdFD_MAX_FD_NUM];thirdFfd_data_t ffd_data[thirdFD_MAX_FD_NUM];thirdFfd_data_t ori_ffd_data[thirdFD_MAX_FD_NUM];thirdFaceROIData face_roi[thirdFD_MAX_FD_NUM];uint32_t fdDimensionW;                        ///< Face detection widthuint32_t fdDimensionH;                        ///< Face detection heightint32_t yaw[thirdFD_MAX_FD_NUM];int32_t pitch[thirdFD_MAX_FD_NUM];int32_t roll[thirdFD_MAX_FD_NUM];int32_t faceLuma[thirdFD_MAX_FD_NUM];int32_t faceLumaRatio;int32_t colorTemperature;int32_t lip_HSV[thirdFD_MAX_FD_NUM * thirdFD_HSV_CHANNEL_NUM];int32_t iso;int32_t feature[thirdFD_MAX_FD_NUM];int32_t faceid[thirdFD_MAX_FD_NUM];int32_t reserve[thirdFD_RESERVE_ITEM];int32_t race[thirdFD_MAX_FD_NUM];
} thirdFace_data_app_t;typedef struct {int32_t x[thirdFD_MAX_FFD_NUM_512];int32_t y[thirdFD_MAX_FFD_NUM_512];int32_t occlusion[thirdFD_MAX_FFD_NUM_512];
} thirdFfdPreviewData;typedef struct {thirdFfdPreviewData ffdData[thirdFD_MAX_FD_NUM];thirdFfdPreviewData oriFfdData[thirdFD_MAX_FD_NUM];int pointsCount;
} thirdFfdPreviewAppData;typedef struct {int w;int h;
} thirdSize;typedef struct {int makeupState;bool isEISOn;thirdSize previewImgSize;
} thirdFaceInitData;typedef struct {thirdSize sensorSize;thirdSize previewSize;thirdSize ImgSize;bool isEisOn;
} thirdProcessData;typedef struct {thirdFace_data_app_t faceInfoOri;thirdFfdPreviewAppData ffd296Data;thirdProcessData fdProcessInfo;
} thirdFaceDataAppJoint;

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