bmcv_image

以下数据结构以及接口仅为了兼容上一代产品，并且其功能在前边章节中均可实现，在 BM1684 系列产品中不建议使用。

BM1682的BMCV库对常用的图像相关的数据结构进行了封装，主要定义了image相关的数据结构。

定义以下:

#define MAX_BMCV_IMAGE_CHANNEL 4
typedef enum bmcv_data_format_{
    DATA_TYPE_FLOAT = 0,  // data type is 32 bit float
    DATA_TYPE_BYTE = 4  // data type is 8 bit
}bmcv_data_format;

typedef enum bmcv_color_space_{
    COLOR_YUV,  // color space is yuv
    COLOR_YCbCr, // color space is YCbCr
    COLOR_RGB  // color space is rgb
}bmcv_color_space;

typedef enum bmcv_image_format_{
    YUV420P,  // data is in YUV420 packed format
    NV12,  // data is in NV12 format
    NV21,  // data is in NV21 format
    RGB,  // data is in RGB planar format
    BGR,  // data is in BGR planar format
    RGB_PACKED, // data is in RGB packed format
    BGR_PACKED, // data is in BGR packed format
    BGR4N  // data is in BGR 4N mode, for future use
}bmcv_image_format;

typedef struct bmcv_image_t{
    bmcv_color_space color_space;
    bmcv_data_format data_format;
    bmcv_image_format image_format;
    int              image_width;
    int              image_height;
    bm_device_mem_t  data[MAX_BMCV_IMAGE_CHANNEL];
    int              stride[MAX_BMCV_IMAGE_CHANNEL];
}bmcv_image;

各个参数说明（bm_image中有类似的参数定义）:

• bmcv_color_space color_space

表示图像颜色空间

• bmcv_data_format data_format

表示图像数据类型

• bmcv_image_format image_format

表示图像格式

• int image_width

表示图像宽

• int image_height

表示图像高

• bm_device_mem_t data[MAX_BMCV_IMAGE_CHANNEL]

表示图像各通道数据地址

• int stride[MAX_BMCV_IMAGE_CHANNEL]

表示图像各通道stride