UVC摄像头百科
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常用图像像素格式 NV12、NV2、I420、YV12、YUYV
Windows应用层视频API接口

Linux支持的UVC视频格式

2021-03-31 1850 0

Linux支持的UVC视频格式位于linux-5.6.11\linux-5.6.11\drivers\media\usb\uvc\uvc_driver.c文件下：
其数组结构定义如下：

static struct uvc_format_desc uvc_fmts[] = {
    {
        .name        = "YUV 4:2:2 (YUYV)",
        .guid        = UVC_GUID_FORMAT_YUY2,
        .fcc        = V4L2_PIX_FMT_YUYV,
    },
    {
        .name        = "YUV 4:2:2 (YUYV)",
        .guid        = UVC_GUID_FORMAT_YUY2_ISIGHT,
        .fcc        = V4L2_PIX_FMT_YUYV,
    },
    {
        .name        = "YUV 4:2:0 (NV12)",
        .guid        = UVC_GUID_FORMAT_NV12,
        .fcc        = V4L2_PIX_FMT_NV12,
    },
    {
        .name        = "MJPEG",
        .guid        = UVC_GUID_FORMAT_MJPEG,
        .fcc        = V4L2_PIX_FMT_MJPEG,
    },
    {
        .name        = "YVU 4:2:0 (YV12)",
        .guid        = UVC_GUID_FORMAT_YV12,
        .fcc        = V4L2_PIX_FMT_YVU420,
    },
    {
        .name        = "YUV 4:2:0 (I420)",
        .guid        = UVC_GUID_FORMAT_I420,
        .fcc        = V4L2_PIX_FMT_YUV420,
    },
    {
        .name        = "YUV 4:2:0 (M420)",
        .guid        = UVC_GUID_FORMAT_M420,
        .fcc        = V4L2_PIX_FMT_M420,
    },
    {
        .name        = "YUV 4:2:2 (UYVY)",
        .guid        = UVC_GUID_FORMAT_UYVY,
        .fcc        = V4L2_PIX_FMT_UYVY,
    },
    {
        .name        = "Greyscale 8-bit (Y800)",
        .guid        = UVC_GUID_FORMAT_Y800,
        .fcc        = V4L2_PIX_FMT_GREY,
    },
    {
        .name        = "Greyscale 8-bit (Y8  )",
        .guid        = UVC_GUID_FORMAT_Y8,
        .fcc        = V4L2_PIX_FMT_GREY,
    },
    {
        .name        = "Greyscale 8-bit (D3DFMT_L8)",
        .guid        = UVC_GUID_FORMAT_D3DFMT_L8,
        .fcc        = V4L2_PIX_FMT_GREY,
    },
    {
        .name        = "IR 8-bit (L8_IR)",
        .guid        = UVC_GUID_FORMAT_KSMEDIA_L8_IR,
        .fcc        = V4L2_PIX_FMT_GREY,
    },
    {
        .name        = "Greyscale 10-bit (Y10 )",
        .guid        = UVC_GUID_FORMAT_Y10,
        .fcc        = V4L2_PIX_FMT_Y10,
    },
    {
        .name        = "Greyscale 12-bit (Y12 )",
        .guid        = UVC_GUID_FORMAT_Y12,
        .fcc        = V4L2_PIX_FMT_Y12,
    },
    {
        .name        = "Greyscale 16-bit (Y16 )",
        .guid        = UVC_GUID_FORMAT_Y16,
        .fcc        = V4L2_PIX_FMT_Y16,
    },
    {
        .name        = "BGGR Bayer (BY8 )",
        .guid        = UVC_GUID_FORMAT_BY8,
        .fcc        = V4L2_PIX_FMT_SBGGR8,
    },
    {
        .name        = "BGGR Bayer (BA81)",
        .guid        = UVC_GUID_FORMAT_BA81,
        .fcc        = V4L2_PIX_FMT_SBGGR8,
    },
    {
        .name        = "GBRG Bayer (GBRG)",
        .guid        = UVC_GUID_FORMAT_GBRG,
        .fcc        = V4L2_PIX_FMT_SGBRG8,
    },
    {
        .name        = "GRBG Bayer (GRBG)",
        .guid        = UVC_GUID_FORMAT_GRBG,
        .fcc        = V4L2_PIX_FMT_SGRBG8,
    },
    {
        .name        = "RGGB Bayer (RGGB)",
        .guid        = UVC_GUID_FORMAT_RGGB,
        .fcc        = V4L2_PIX_FMT_SRGGB8,
    },
    {
        .name        = "RGB565",
        .guid        = UVC_GUID_FORMAT_RGBP,
        .fcc        = V4L2_PIX_FMT_RGB565,
    },
    {
        .name        = "BGR 8:8:8 (BGR3)",
        .guid        = UVC_GUID_FORMAT_BGR3,
        .fcc        = V4L2_PIX_FMT_BGR24,
    },
    {
        .name        = "H.264",
        .guid        = UVC_GUID_FORMAT_H264,
        .fcc        = V4L2_PIX_FMT_H264,
    },
    {
        .name        = "Greyscale 8 L/R (Y8I)",
        .guid        = UVC_GUID_FORMAT_Y8I,
        .fcc        = V4L2_PIX_FMT_Y8I,
    },
    {
        .name        = "Greyscale 12 L/R (Y12I)",
        .guid        = UVC_GUID_FORMAT_Y12I,
        .fcc        = V4L2_PIX_FMT_Y12I,
    },
    {
        .name        = "Depth data 16-bit (Z16)",
        .guid        = UVC_GUID_FORMAT_Z16,
        .fcc        = V4L2_PIX_FMT_Z16,
    },
    {
        .name        = "Bayer 10-bit (SRGGB10P)",
        .guid        = UVC_GUID_FORMAT_RW10,
        .fcc        = V4L2_PIX_FMT_SRGGB10P,
    },
    {
        .name        = "Bayer 16-bit (SBGGR16)",
        .guid        = UVC_GUID_FORMAT_BG16,
        .fcc        = V4L2_PIX_FMT_SBGGR16,
    },
    {
        .name        = "Bayer 16-bit (SGBRG16)",
        .guid        = UVC_GUID_FORMAT_GB16,
        .fcc        = V4L2_PIX_FMT_SGBRG16,
    },
    {
        .name        = "Bayer 16-bit (SRGGB16)",
        .guid        = UVC_GUID_FORMAT_RG16,
        .fcc        = V4L2_PIX_FMT_SRGGB16,
    },
    {
        .name        = "Bayer 16-bit (SGRBG16)",
        .guid        = UVC_GUID_FORMAT_GR16,
        .fcc        = V4L2_PIX_FMT_SGRBG16,
    },
    {
        .name        = "Depth data 16-bit (Z16)",
        .guid        = UVC_GUID_FORMAT_INVZ,
        .fcc        = V4L2_PIX_FMT_Z16,
    },
    {
        .name        = "Greyscale 10-bit (Y10 )",
        .guid        = UVC_GUID_FORMAT_INVI,
        .fcc        = V4L2_PIX_FMT_Y10,
    },
    {
        .name        = "IR:Depth 26-bit (INZI)",
        .guid        = UVC_GUID_FORMAT_INZI,
        .fcc        = V4L2_PIX_FMT_INZI,
    },
    {
        .name        = "4-bit Depth Confidence (Packed)",
        .guid        = UVC_GUID_FORMAT_CNF4,
        .fcc        = V4L2_PIX_FMT_CNF4,
    },
};

其各个格式的GUID定义如下：


/* ------------------------------------------------------------------------
 * GUIDs
 */
#define UVC_GUID_UVC_CAMERA \
    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01}
#define UVC_GUID_UVC_OUTPUT \
    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02}
#define UVC_GUID_UVC_MEDIA_TRANSPORT_INPUT \
    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03}
#define UVC_GUID_UVC_PROCESSING \
    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01}
#define UVC_GUID_UVC_SELECTOR \
    {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, \
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02}

#define UVC_GUID_FORMAT_MJPEG \
    { 'M',  'J',  'P',  'G', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_YUY2 \
    { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_YUY2_ISIGHT \
    { 'Y',  'U',  'Y',  '2', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0x00, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_NV12 \
    { 'N',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_YV12 \
    { 'Y',  'V',  '1',  '2', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_I420 \
    { 'I',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_UYVY \
    { 'U',  'Y',  'V',  'Y', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y800 \
    { 'Y',  '8',  '0',  '0', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y8 \
    { 'Y',  '8',  ' ',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y10 \
    { 'Y',  '1',  '0',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y12 \
    { 'Y',  '1',  '2',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y16 \
    { 'Y',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_BY8 \
    { 'B',  'Y',  '8',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_BA81 \
    { 'B',  'A',  '8',  '1', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GBRG \
    { 'G',  'B',  'R',  'G', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GRBG \
    { 'G',  'R',  'B',  'G', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RGGB \
    { 'R',  'G',  'G',  'B', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_BG16 \
    { 'B',  'G',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GB16 \
    { 'G',  'B',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RG16 \
    { 'R',  'G',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_GR16 \
    { 'G',  'R',  '1',  '6', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RGBP \
    { 'R',  'G',  'B',  'P', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_BGR3 \
    { 0x7d, 0xeb, 0x36, 0xe4, 0x4f, 0x52, 0xce, 0x11, \
     0x9f, 0x53, 0x00, 0x20, 0xaf, 0x0b, 0xa7, 0x70}
#define UVC_GUID_FORMAT_M420 \
    { 'M',  '4',  '2',  '0', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}

#define UVC_GUID_FORMAT_H264 \
    { 'H',  '2',  '6',  '4', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y8I \
    { 'Y',  '8',  'I',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Y12I \
    { 'Y',  '1',  '2',  'I', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_Z16 \
    { 'Z',  '1',  '6',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_RW10 \
    { 'R',  'W',  '1',  '0', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_INVZ \
    { 'I',  'N',  'V',  'Z', 0x90, 0x2d, 0x58, 0x4a, \
     0x92, 0x0b, 0x77, 0x3f, 0x1f, 0x2c, 0x55, 0x6b}
#define UVC_GUID_FORMAT_INZI \
    { 'I',  'N',  'Z',  'I', 0x66, 0x1a, 0x42, 0xa2, \
     0x90, 0x65, 0xd0, 0x18, 0x14, 0xa8, 0xef, 0x8a}
#define UVC_GUID_FORMAT_INVI \
    { 'I',  'N',  'V',  'I', 0xdb, 0x57, 0x49, 0x5e, \
     0x8e, 0x3f, 0xf4, 0x79, 0x53, 0x2b, 0x94, 0x6f}
#define UVC_GUID_FORMAT_CNF4 \
    { 'C',  ' ',  ' ',  ' ', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}

#define UVC_GUID_FORMAT_D3DFMT_L8 \
    {0x32, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}
#define UVC_GUID_FORMAT_KSMEDIA_L8_IR \
    {0x32, 0x00, 0x00, 0x00, 0x02, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}

#define UVC_GUID_FORMAT_HEVC \
    { 'H',  'E',  'V',  'C', 0x00, 0x00, 0x10, 0x00, \
     0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71}

短类型标识如下：

/* RGB formats (1 or 2 bytes per pixel) */
#define V4L2_PIX_FMT_RGB332  v4l2_fourcc('R', 'G', 'B', '1') /*  8  RGB-3-3-2     */
#define V4L2_PIX_FMT_RGB444  v4l2_fourcc('R', '4', '4', '4') /* 16  xxxxrrrr ggggbbbb */
#define V4L2_PIX_FMT_ARGB444 v4l2_fourcc('A', 'R', '1', '2') /* 16  aaaarrrr ggggbbbb */
#define V4L2_PIX_FMT_XRGB444 v4l2_fourcc('X', 'R', '1', '2') /* 16  xxxxrrrr ggggbbbb */
#define V4L2_PIX_FMT_RGBA444 v4l2_fourcc('R', 'A', '1', '2') /* 16  rrrrgggg bbbbaaaa */
#define V4L2_PIX_FMT_RGBX444 v4l2_fourcc('R', 'X', '1', '2') /* 16  rrrrgggg bbbbxxxx */
#define V4L2_PIX_FMT_ABGR444 v4l2_fourcc('A', 'B', '1', '2') /* 16  aaaabbbb ggggrrrr */
#define V4L2_PIX_FMT_XBGR444 v4l2_fourcc('X', 'B', '1', '2') /* 16  xxxxbbbb ggggrrrr */
#define V4L2_PIX_FMT_BGRA444 v4l2_fourcc('G', 'A', '1', '2') /* 16  bbbbgggg rrrraaaa */
#define V4L2_PIX_FMT_BGRX444 v4l2_fourcc('B', 'X', '1', '2') /* 16  bbbbgggg rrrrxxxx */
#define V4L2_PIX_FMT_RGB555  v4l2_fourcc('R', 'G', 'B', 'O') /* 16  RGB-5-5-5     */
#define V4L2_PIX_FMT_ARGB555 v4l2_fourcc('A', 'R', '1', '5') /* 16  ARGB-1-5-5-5  */
#define V4L2_PIX_FMT_XRGB555 v4l2_fourcc('X', 'R', '1', '5') /* 16  XRGB-1-5-5-5  */
#define V4L2_PIX_FMT_RGBA555 v4l2_fourcc('R', 'A', '1', '5') /* 16  RGBA-5-5-5-1  */
#define V4L2_PIX_FMT_RGBX555 v4l2_fourcc('R', 'X', '1', '5') /* 16  RGBX-5-5-5-1  */
#define V4L2_PIX_FMT_ABGR555 v4l2_fourcc('A', 'B', '1', '5') /* 16  ABGR-1-5-5-5  */
#define V4L2_PIX_FMT_XBGR555 v4l2_fourcc('X', 'B', '1', '5') /* 16  XBGR-1-5-5-5  */
#define V4L2_PIX_FMT_BGRA555 v4l2_fourcc('B', 'A', '1', '5') /* 16  BGRA-5-5-5-1  */
#define V4L2_PIX_FMT_BGRX555 v4l2_fourcc('B', 'X', '1', '5') /* 16  BGRX-5-5-5-1  */
#define V4L2_PIX_FMT_RGB565  v4l2_fourcc('R', 'G', 'B', 'P') /* 16  RGB-5-6-5     */
#define V4L2_PIX_FMT_RGB555X v4l2_fourcc('R', 'G', 'B', 'Q') /* 16  RGB-5-5-5 BE  */
#define V4L2_PIX_FMT_ARGB555X v4l2_fourcc_be('A', 'R', '1', '5') /* 16  ARGB-5-5-5 BE */
#define V4L2_PIX_FMT_XRGB555X v4l2_fourcc_be('X', 'R', '1', '5') /* 16  XRGB-5-5-5 BE */
#define V4L2_PIX_FMT_RGB565X v4l2_fourcc('R', 'G', 'B', 'R') /* 16  RGB-5-6-5 BE  */

/* RGB formats (3 or 4 bytes per pixel) */
#define V4L2_PIX_FMT_BGR666  v4l2_fourcc('B', 'G', 'R', 'H') /* 18  BGR-6-6-6      */
#define V4L2_PIX_FMT_BGR24   v4l2_fourcc('B', 'G', 'R', '3') /* 24  BGR-8-8-8     */
#define V4L2_PIX_FMT_RGB24   v4l2_fourcc('R', 'G', 'B', '3') /* 24  RGB-8-8-8     */
#define V4L2_PIX_FMT_BGR32   v4l2_fourcc('B', 'G', 'R', '4') /* 32  BGR-8-8-8-8   */
#define V4L2_PIX_FMT_ABGR32  v4l2_fourcc('A', 'R', '2', '4') /* 32  BGRA-8-8-8-8  */
#define V4L2_PIX_FMT_XBGR32  v4l2_fourcc('X', 'R', '2', '4') /* 32  BGRX-8-8-8-8  */
#define V4L2_PIX_FMT_BGRA32  v4l2_fourcc('R', 'A', '2', '4') /* 32  ABGR-8-8-8-8  */
#define V4L2_PIX_FMT_BGRX32  v4l2_fourcc('R', 'X', '2', '4') /* 32  XBGR-8-8-8-8  */
#define V4L2_PIX_FMT_RGB32   v4l2_fourcc('R', 'G', 'B', '4') /* 32  RGB-8-8-8-8   */
#define V4L2_PIX_FMT_RGBA32  v4l2_fourcc('A', 'B', '2', '4') /* 32  RGBA-8-8-8-8  */
#define V4L2_PIX_FMT_RGBX32  v4l2_fourcc('X', 'B', '2', '4') /* 32  RGBX-8-8-8-8  */
#define V4L2_PIX_FMT_ARGB32  v4l2_fourcc('B', 'A', '2', '4') /* 32  ARGB-8-8-8-8  */
#define V4L2_PIX_FMT_XRGB32  v4l2_fourcc('B', 'X', '2', '4') /* 32  XRGB-8-8-8-8  */

/* Grey formats */
#define V4L2_PIX_FMT_GREY    v4l2_fourcc('G', 'R', 'E', 'Y') /*  8  Greyscale     */
#define V4L2_PIX_FMT_Y4      v4l2_fourcc('Y', '0', '4', ' ') /*  4  Greyscale     */
#define V4L2_PIX_FMT_Y6      v4l2_fourcc('Y', '0', '6', ' ') /*  6  Greyscale     */
#define V4L2_PIX_FMT_Y10     v4l2_fourcc('Y', '1', '0', ' ') /* 10  Greyscale     */
#define V4L2_PIX_FMT_Y12     v4l2_fourcc('Y', '1', '2', ' ') /* 12  Greyscale     */
#define V4L2_PIX_FMT_Y14     v4l2_fourcc('Y', '1', '4', ' ') /* 14  Greyscale     */
#define V4L2_PIX_FMT_Y16     v4l2_fourcc('Y', '1', '6', ' ') /* 16  Greyscale     */
#define V4L2_PIX_FMT_Y16_BE  v4l2_fourcc_be('Y', '1', '6', ' ') /* 16  Greyscale BE  */

/* Grey bit-packed formats */
#define V4L2_PIX_FMT_Y10BPACK    v4l2_fourcc('Y', '1', '0', 'B') /* 10  Greyscale bit-packed */
#define V4L2_PIX_FMT_Y10P    v4l2_fourcc('Y', '1', '0', 'P') /* 10  Greyscale, MIPI RAW10 packed */

/* Palette formats */
#define V4L2_PIX_FMT_PAL8    v4l2_fourcc('P', 'A', 'L', '8') /*  8  8-bit palette */

/* Chrominance formats */
#define V4L2_PIX_FMT_UV8     v4l2_fourcc('U', 'V', '8', ' ') /*  8  UV 4:4 */

/* Luminance+Chrominance formats */
#define V4L2_PIX_FMT_YUYV    v4l2_fourcc('Y', 'U', 'Y', 'V') /* 16  YUV 4:2:2     */
#define V4L2_PIX_FMT_YYUV    v4l2_fourcc('Y', 'Y', 'U', 'V') /* 16  YUV 4:2:2     */
#define V4L2_PIX_FMT_YVYU    v4l2_fourcc('Y', 'V', 'Y', 'U') /* 16 YVU 4:2:2 */
#define V4L2_PIX_FMT_UYVY    v4l2_fourcc('U', 'Y', 'V', 'Y') /* 16  YUV 4:2:2     */
#define V4L2_PIX_FMT_VYUY    v4l2_fourcc('V', 'Y', 'U', 'Y') /* 16  YUV 4:2:2     */
#define V4L2_PIX_FMT_Y41P    v4l2_fourcc('Y', '4', '1', 'P') /* 12  YUV 4:1:1     */
#define V4L2_PIX_FMT_YUV444  v4l2_fourcc('Y', '4', '4', '4') /* 16  xxxxyyyy uuuuvvvv */
#define V4L2_PIX_FMT_YUV555  v4l2_fourcc('Y', 'U', 'V', 'O') /* 16  YUV-5-5-5     */
#define V4L2_PIX_FMT_YUV565  v4l2_fourcc('Y', 'U', 'V', 'P') /* 16  YUV-5-6-5     */
#define V4L2_PIX_FMT_YUV32   v4l2_fourcc('Y', 'U', 'V', '4') /* 32  YUV-8-8-8-8   */
#define V4L2_PIX_FMT_AYUV32  v4l2_fourcc('A', 'Y', 'U', 'V') /* 32  AYUV-8-8-8-8  */
#define V4L2_PIX_FMT_XYUV32  v4l2_fourcc('X', 'Y', 'U', 'V') /* 32  XYUV-8-8-8-8  */
#define V4L2_PIX_FMT_VUYA32  v4l2_fourcc('V', 'U', 'Y', 'A') /* 32  VUYA-8-8-8-8  */
#define V4L2_PIX_FMT_VUYX32  v4l2_fourcc('V', 'U', 'Y', 'X') /* 32  VUYX-8-8-8-8  */
#define V4L2_PIX_FMT_M420    v4l2_fourcc('M', '4', '2', '0') /* 12  YUV 4:2:0 2 lines y, 1 line uv interleaved */

/* two planes -- one Y, one Cr + Cb interleaved  */
#define V4L2_PIX_FMT_NV12    v4l2_fourcc('N', 'V', '1', '2') /* 12  Y/CbCr 4:2:0  */
#define V4L2_PIX_FMT_NV21    v4l2_fourcc('N', 'V', '2', '1') /* 12  Y/CrCb 4:2:0  */
#define V4L2_PIX_FMT_NV16    v4l2_fourcc('N', 'V', '1', '6') /* 16  Y/CbCr 4:2:2  */
#define V4L2_PIX_FMT_NV61    v4l2_fourcc('N', 'V', '6', '1') /* 16  Y/CrCb 4:2:2  */
#define V4L2_PIX_FMT_NV24    v4l2_fourcc('N', 'V', '2', '4') /* 24  Y/CbCr 4:4:4  */
#define V4L2_PIX_FMT_NV42    v4l2_fourcc('N', 'V', '4', '2') /* 24  Y/CrCb 4:4:4  */
#define V4L2_PIX_FMT_HM12    v4l2_fourcc('H', 'M', '1', '2') /*  8  YUV 4:2:0 16x16 macroblocks */

/* two non contiguous planes - one Y, one Cr + Cb interleaved  */
#define V4L2_PIX_FMT_NV12M   v4l2_fourcc('N', 'M', '1', '2') /* 12  Y/CbCr 4:2:0  */
#define V4L2_PIX_FMT_NV21M   v4l2_fourcc('N', 'M', '2', '1') /* 21  Y/CrCb 4:2:0  */
#define V4L2_PIX_FMT_NV16M   v4l2_fourcc('N', 'M', '1', '6') /* 16  Y/CbCr 4:2:2  */
#define V4L2_PIX_FMT_NV61M   v4l2_fourcc('N', 'M', '6', '1') /* 16  Y/CrCb 4:2:2  */
#define V4L2_PIX_FMT_NV12MT  v4l2_fourcc('T', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 64x32 macroblocks */
#define V4L2_PIX_FMT_NV12MT_16X16 v4l2_fourcc('V', 'M', '1', '2') /* 12  Y/CbCr 4:2:0 16x16 macroblocks */

/* three planes - Y Cb, Cr */
#define V4L2_PIX_FMT_YUV410  v4l2_fourcc('Y', 'U', 'V', '9') /*  9  YUV 4:1:0     */
#define V4L2_PIX_FMT_YVU410  v4l2_fourcc('Y', 'V', 'U', '9') /*  9  YVU 4:1:0     */
#define V4L2_PIX_FMT_YUV411P v4l2_fourcc('4', '1', '1', 'P') /* 12  YVU411 planar */
#define V4L2_PIX_FMT_YUV420  v4l2_fourcc('Y', 'U', '1', '2') /* 12  YUV 4:2:0     */
#define V4L2_PIX_FMT_YVU420  v4l2_fourcc('Y', 'V', '1', '2') /* 12  YVU 4:2:0     */
#define V4L2_PIX_FMT_YUV422P v4l2_fourcc('4', '2', '2', 'P') /* 16  YVU422 planar */

/* three non contiguous planes - Y, Cb, Cr */
#define V4L2_PIX_FMT_YUV420M v4l2_fourcc('Y', 'M', '1', '2') /* 12  YUV420 planar */
#define V4L2_PIX_FMT_YVU420M v4l2_fourcc('Y', 'M', '2', '1') /* 12  YVU420 planar */
#define V4L2_PIX_FMT_YUV422M v4l2_fourcc('Y', 'M', '1', '6') /* 16  YUV422 planar */
#define V4L2_PIX_FMT_YVU422M v4l2_fourcc('Y', 'M', '6', '1') /* 16  YVU422 planar */
#define V4L2_PIX_FMT_YUV444M v4l2_fourcc('Y', 'M', '2', '4') /* 24  YUV444 planar */
#define V4L2_PIX_FMT_YVU444M v4l2_fourcc('Y', 'M', '4', '2') /* 24  YVU444 planar */

/* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
#define V4L2_PIX_FMT_SBGGR8  v4l2_fourcc('B', 'A', '8', '1') /*  8  BGBG.. GRGR.. */
#define V4L2_PIX_FMT_SGBRG8  v4l2_fourcc('G', 'B', 'R', 'G') /*  8  GBGB.. RGRG.. */
#define V4L2_PIX_FMT_SGRBG8  v4l2_fourcc('G', 'R', 'B', 'G') /*  8  GRGR.. BGBG.. */
#define V4L2_PIX_FMT_SRGGB8  v4l2_fourcc('R', 'G', 'G', 'B') /*  8  RGRG.. GBGB.. */
#define V4L2_PIX_FMT_SBGGR10 v4l2_fourcc('B', 'G', '1', '0') /* 10  BGBG.. GRGR.. */
#define V4L2_PIX_FMT_SGBRG10 v4l2_fourcc('G', 'B', '1', '0') /* 10  GBGB.. RGRG.. */
#define V4L2_PIX_FMT_SGRBG10 v4l2_fourcc('B', 'A', '1', '0') /* 10  GRGR.. BGBG.. */
#define V4L2_PIX_FMT_SRGGB10 v4l2_fourcc('R', 'G', '1', '0') /* 10  RGRG.. GBGB.. */
    /* 10bit raw bayer packed, 5 bytes for every 4 pixels */
#define V4L2_PIX_FMT_SBGGR10P v4l2_fourcc('p', 'B', 'A', 'A')
#define V4L2_PIX_FMT_SGBRG10P v4l2_fourcc('p', 'G', 'A', 'A')
#define V4L2_PIX_FMT_SGRBG10P v4l2_fourcc('p', 'g', 'A', 'A')
#define V4L2_PIX_FMT_SRGGB10P v4l2_fourcc('p', 'R', 'A', 'A')
    /* 10bit raw bayer a-law compressed to 8 bits */
#define V4L2_PIX_FMT_SBGGR10ALAW8 v4l2_fourcc('a', 'B', 'A', '8')
#define V4L2_PIX_FMT_SGBRG10ALAW8 v4l2_fourcc('a', 'G', 'A', '8')
#define V4L2_PIX_FMT_SGRBG10ALAW8 v4l2_fourcc('a', 'g', 'A', '8')
#define V4L2_PIX_FMT_SRGGB10ALAW8 v4l2_fourcc('a', 'R', 'A', '8')
    /* 10bit raw bayer DPCM compressed to 8 bits */
#define V4L2_PIX_FMT_SBGGR10DPCM8 v4l2_fourcc('b', 'B', 'A', '8')
#define V4L2_PIX_FMT_SGBRG10DPCM8 v4l2_fourcc('b', 'G', 'A', '8')
#define V4L2_PIX_FMT_SGRBG10DPCM8 v4l2_fourcc('B', 'D', '1', '0')
#define V4L2_PIX_FMT_SRGGB10DPCM8 v4l2_fourcc('b', 'R', 'A', '8')
#define V4L2_PIX_FMT_SBGGR12 v4l2_fourcc('B', 'G', '1', '2') /* 12  BGBG.. GRGR.. */
#define V4L2_PIX_FMT_SGBRG12 v4l2_fourcc('G', 'B', '1', '2') /* 12  GBGB.. RGRG.. */
#define V4L2_PIX_FMT_SGRBG12 v4l2_fourcc('B', 'A', '1', '2') /* 12  GRGR.. BGBG.. */
#define V4L2_PIX_FMT_SRGGB12 v4l2_fourcc('R', 'G', '1', '2') /* 12  RGRG.. GBGB.. */
    /* 12bit raw bayer packed, 6 bytes for every 4 pixels */
#define V4L2_PIX_FMT_SBGGR12P v4l2_fourcc('p', 'B', 'C', 'C')
#define V4L2_PIX_FMT_SGBRG12P v4l2_fourcc('p', 'G', 'C', 'C')
#define V4L2_PIX_FMT_SGRBG12P v4l2_fourcc('p', 'g', 'C', 'C')
#define V4L2_PIX_FMT_SRGGB12P v4l2_fourcc('p', 'R', 'C', 'C')
#define V4L2_PIX_FMT_SBGGR14 v4l2_fourcc('B', 'G', '1', '4') /* 14  BGBG.. GRGR.. */
#define V4L2_PIX_FMT_SGBRG14 v4l2_fourcc('G', 'B', '1', '4') /* 14  GBGB.. RGRG.. */
#define V4L2_PIX_FMT_SGRBG14 v4l2_fourcc('G', 'R', '1', '4') /* 14  GRGR.. BGBG.. */
#define V4L2_PIX_FMT_SRGGB14 v4l2_fourcc('R', 'G', '1', '4') /* 14  RGRG.. GBGB.. */
    /* 14bit raw bayer packed, 7 bytes for every 4 pixels */
#define V4L2_PIX_FMT_SBGGR14P v4l2_fourcc('p', 'B', 'E', 'E')
#define V4L2_PIX_FMT_SGBRG14P v4l2_fourcc('p', 'G', 'E', 'E')
#define V4L2_PIX_FMT_SGRBG14P v4l2_fourcc('p', 'g', 'E', 'E')
#define V4L2_PIX_FMT_SRGGB14P v4l2_fourcc('p', 'R', 'E', 'E')
#define V4L2_PIX_FMT_SBGGR16 v4l2_fourcc('B', 'Y', 'R', '2') /* 16  BGBG.. GRGR.. */
#define V4L2_PIX_FMT_SGBRG16 v4l2_fourcc('G', 'B', '1', '6') /* 16  GBGB.. RGRG.. */
#define V4L2_PIX_FMT_SGRBG16 v4l2_fourcc('G', 'R', '1', '6') /* 16  GRGR.. BGBG.. */
#define V4L2_PIX_FMT_SRGGB16 v4l2_fourcc('R', 'G', '1', '6') /* 16  RGRG.. GBGB.. */

/* HSV formats */
#define V4L2_PIX_FMT_HSV24 v4l2_fourcc('H', 'S', 'V', '3')
#define V4L2_PIX_FMT_HSV32 v4l2_fourcc('H', 'S', 'V', '4')

/* compressed formats */
#define V4L2_PIX_FMT_MJPEG    v4l2_fourcc('M', 'J', 'P', 'G') /* Motion-JPEG   */
#define V4L2_PIX_FMT_JPEG     v4l2_fourcc('J', 'P', 'E', 'G') /* JFIF JPEG     */
#define V4L2_PIX_FMT_DV       v4l2_fourcc('d', 'v', 's', 'd') /* 1394          */
#define V4L2_PIX_FMT_MPEG     v4l2_fourcc('M', 'P', 'E', 'G') /* MPEG-1/2/4 Multiplexed */
#define V4L2_PIX_FMT_H264     v4l2_fourcc('H', '2', '6', '4') /* H264 with start codes */
#define V4L2_PIX_FMT_H264_NO_SC v4l2_fourcc('A', 'V', 'C', '1') /* H264 without start codes */
#define V4L2_PIX_FMT_H264_MVC v4l2_fourcc('M', '2', '6', '4') /* H264 MVC */
#define V4L2_PIX_FMT_H263     v4l2_fourcc('H', '2', '6', '3') /* H263          */
#define V4L2_PIX_FMT_MPEG1    v4l2_fourcc('M', 'P', 'G', '1') /* MPEG-1 ES     */
#define V4L2_PIX_FMT_MPEG2    v4l2_fourcc('M', 'P', 'G', '2') /* MPEG-2 ES     */
#define V4L2_PIX_FMT_MPEG2_SLICE v4l2_fourcc('M', 'G', '2', 'S') /* MPEG-2 parsed slice data */
#define V4L2_PIX_FMT_MPEG4    v4l2_fourcc('M', 'P', 'G', '4') /* MPEG-4 part 2 ES */
#define V4L2_PIX_FMT_XVID     v4l2_fourcc('X', 'V', 'I', 'D') /* Xvid           */
#define V4L2_PIX_FMT_VC1_ANNEX_G v4l2_fourcc('V', 'C', '1', 'G') /* SMPTE 421M Annex G compliant stream */
#define V4L2_PIX_FMT_VC1_ANNEX_L v4l2_fourcc('V', 'C', '1', 'L') /* SMPTE 421M Annex L compliant stream */
#define V4L2_PIX_FMT_VP8      v4l2_fourcc('V', 'P', '8', '0') /* VP8 */
#define V4L2_PIX_FMT_VP9      v4l2_fourcc('V', 'P', '9', '0') /* VP9 */
#define V4L2_PIX_FMT_HEVC     v4l2_fourcc('H', 'E', 'V', 'C') /* HEVC aka H.265 */
#define V4L2_PIX_FMT_FWHT     v4l2_fourcc('F', 'W', 'H', 'T') /* Fast Walsh Hadamard Transform (vicodec) */
#define V4L2_PIX_FMT_FWHT_STATELESS     v4l2_fourcc('S', 'F', 'W', 'H') /* Stateless FWHT (vicodec) */
#define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */

/*  Vendor-specific formats   */
#define V4L2_PIX_FMT_CPIA1    v4l2_fourcc('C', 'P', 'I', 'A') /* cpia1 YUV */
#define V4L2_PIX_FMT_WNVA     v4l2_fourcc('W', 'N', 'V', 'A') /* Winnov hw compress */
#define V4L2_PIX_FMT_SN9C10X  v4l2_fourcc('S', '9', '1', '0') /* SN9C10x compression */
#define V4L2_PIX_FMT_SN9C20X_I420 v4l2_fourcc('S', '9', '2', '0') /* SN9C20x YUV 4:2:0 */
#define V4L2_PIX_FMT_PWC1     v4l2_fourcc('P', 'W', 'C', '1') /* pwc older webcam */
#define V4L2_PIX_FMT_PWC2     v4l2_fourcc('P', 'W', 'C', '2') /* pwc newer webcam */
#define V4L2_PIX_FMT_ET61X251 v4l2_fourcc('E', '6', '2', '5') /* ET61X251 compression */
#define V4L2_PIX_FMT_SPCA501  v4l2_fourcc('S', '5', '0', '1') /* YUYV per line */
#define V4L2_PIX_FMT_SPCA505  v4l2_fourcc('S', '5', '0', '5') /* YYUV per line */
#define V4L2_PIX_FMT_SPCA508  v4l2_fourcc('S', '5', '0', '8') /* YUVY per line */
#define V4L2_PIX_FMT_SPCA561  v4l2_fourcc('S', '5', '6', '1') /* compressed GBRG bayer */
#define V4L2_PIX_FMT_PAC207   v4l2_fourcc('P', '2', '0', '7') /* compressed BGGR bayer */
#define V4L2_PIX_FMT_MR97310A v4l2_fourcc('M', '3', '1', '0') /* compressed BGGR bayer */
#define V4L2_PIX_FMT_JL2005BCD v4l2_fourcc('J', 'L', '2', '0') /* compressed RGGB bayer */
#define V4L2_PIX_FMT_SN9C2028 v4l2_fourcc('S', 'O', 'N', 'X') /* compressed GBRG bayer */
#define V4L2_PIX_FMT_SQ905C   v4l2_fourcc('9', '0', '5', 'C') /* compressed RGGB bayer */
#define V4L2_PIX_FMT_PJPG     v4l2_fourcc('P', 'J', 'P', 'G') /* Pixart 73xx JPEG */
#define V4L2_PIX_FMT_OV511    v4l2_fourcc('O', '5', '1', '1') /* ov511 JPEG */
#define V4L2_PIX_FMT_OV518    v4l2_fourcc('O', '5', '1', '8') /* ov518 JPEG */
#define V4L2_PIX_FMT_STV0680  v4l2_fourcc('S', '6', '8', '0') /* stv0680 bayer */
#define V4L2_PIX_FMT_TM6000   v4l2_fourcc('T', 'M', '6', '0') /* tm5600/tm60x0 */
#define V4L2_PIX_FMT_CIT_YYVYUY v4l2_fourcc('C', 'I', 'T', 'V') /* one line of Y then 1 line of VYUY */
#define V4L2_PIX_FMT_KONICA420  v4l2_fourcc('K', 'O', 'N', 'I') /* YUV420 planar in blocks of 256 pixels */
#define V4L2_PIX_FMT_JPGL    v4l2_fourcc('J', 'P', 'G', 'L') /* JPEG-Lite */
#define V4L2_PIX_FMT_SE401      v4l2_fourcc('S', '4', '0', '1') /* se401 janggu compressed rgb */
#define V4L2_PIX_FMT_S5C_UYVY_JPG v4l2_fourcc('S', '5', 'C', 'I') /* S5C73M3 interleaved UYVY/JPEG */
#define V4L2_PIX_FMT_Y8I      v4l2_fourcc('Y', '8', 'I', ' ') /* Greyscale 8-bit L/R interleaved */
#define V4L2_PIX_FMT_Y12I     v4l2_fourcc('Y', '1', '2', 'I') /* Greyscale 12-bit L/R interleaved */
#define V4L2_PIX_FMT_Z16      v4l2_fourcc('Z', '1', '6', ' ') /* Depth data 16-bit */
#define V4L2_PIX_FMT_MT21C    v4l2_fourcc('M', 'T', '2', '1') /* Mediatek compressed block mode  */
#define V4L2_PIX_FMT_INZI     v4l2_fourcc('I', 'N', 'Z', 'I') /* Intel Planar Greyscale 10-bit and Depth 16-bit */
#define V4L2_PIX_FMT_SUNXI_TILED_NV12 v4l2_fourcc('S', 'T', '1', '2') /* Sunxi Tiled NV12 Format */
#define V4L2_PIX_FMT_CNF4     v4l2_fourcc('C', 'N', 'F', '4') /* Intel 4-bit packed depth confidence information */
#define V4L2_PIX_FMT_HI240    v4l2_fourcc('H', 'I', '2', '4') /* BTTV 8-bit dithered RGB */

/* 10bit raw bayer packed, 32 bytes for every 25 pixels, last LSB 6 bits unused */
#define V4L2_PIX_FMT_IPU3_SBGGR10    v4l2_fourcc('i', 'p', '3', 'b') /* IPU3 packed 10-bit BGGR bayer */
#define V4L2_PIX_FMT_IPU3_SGBRG10    v4l2_fourcc('i', 'p', '3', 'g') /* IPU3 packed 10-bit GBRG bayer */
#define V4L2_PIX_FMT_IPU3_SGRBG10    v4l2_fourcc('i', 'p', '3', 'G') /* IPU3 packed 10-bit GRBG bayer */
#define V4L2_PIX_FMT_IPU3_SRGGB10    v4l2_fourcc('i', 'p', '3', 'r') /* IPU3 packed 10-bit RGGB bayer */

/* SDR formats - used only for Software Defined Radio devices */
#define V4L2_SDR_FMT_CU8          v4l2_fourcc('C', 'U', '0', '8') /* IQ u8 */
#define V4L2_SDR_FMT_CU16LE       v4l2_fourcc('C', 'U', '1', '6') /* IQ u16le */
#define V4L2_SDR_FMT_CS8          v4l2_fourcc('C', 'S', '0', '8') /* complex s8 */
#define V4L2_SDR_FMT_CS14LE       v4l2_fourcc('C', 'S', '1', '4') /* complex s14le */
#define V4L2_SDR_FMT_RU12LE       v4l2_fourcc('R', 'U', '1', '2') /* real u12le */
#define V4L2_SDR_FMT_PCU16BE      v4l2_fourcc('P', 'C', '1', '6') /* planar complex u16be */
#define V4L2_SDR_FMT_PCU18BE      v4l2_fourcc('P', 'C', '1', '8') /* planar complex u18be */
#define V4L2_SDR_FMT_PCU20BE      v4l2_fourcc('P', 'C', '2', '0') /* planar complex u20be */

/* Touch formats - used for Touch devices */
#define V4L2_TCH_FMT_DELTA_TD16    v4l2_fourcc('T', 'D', '1', '6') /* 16-bit signed deltas */
#define V4L2_TCH_FMT_DELTA_TD08    v4l2_fourcc('T', 'D', '0', '8') /* 8-bit signed deltas */
#define V4L2_TCH_FMT_TU16    v4l2_fourcc('T', 'U', '1', '6') /* 16-bit unsigned touch data */
#define V4L2_TCH_FMT_TU08    v4l2_fourcc('T', 'U', '0', '8') /* 8-bit unsigned touch data */

/* Meta-data formats */
#define V4L2_META_FMT_VSP1_HGO    v4l2_fourcc('V', 'S', 'P', 'H') /* R-Car VSP1 1-D Histogram */
#define V4L2_META_FMT_VSP1_HGT    v4l2_fourcc('V', 'S', 'P', 'T') /* R-Car VSP1 2-D Histogram */
#define V4L2_META_FMT_UVC         v4l2_fourcc('U', 'V', 'C', 'H') /* UVC Payload Header metadata */
#define V4L2_META_FMT_D4XX        v4l2_fourcc('D', '4', 'X', 'X') /* D4XX Payload Header metadata */
#define V4L2_META_FMT_VIVID      v4l2_fourcc('V', 'I', 'V', 'D') /* Vivid Metadata */

/* Vendor specific - used for RK_ISP1 camera sub-system */
#define V4L2_META_FMT_RK_ISP1_PARAMS    v4l2_fourcc('R', 'K', '1', 'P') /* Rockchip ISP1 3A Parameters */
#define V4L2_META_FMT_RK_ISP1_STAT_3A    v4l2_fourcc('R', 'K', '1', 'S') /* Rockchip ISP1 3A Statistics */
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常用图像像素格式 NV12、NV2、I420、YV12、YUYV
Windows应用层视频API接口

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Linux V4L2 UVC摄像头框架浅析
V4L2 ：video for linux version 2 ，是 Linux 里一套标准的视频驱动，它支持 UVC 标准的摄像头。本文来分析一下它的核心框架。整个v4l2的框架分为三层：在应用层，我们可以在 /dev 目录发现 video0 类似的设备节点，上层的摄像头程序打开设备节点进行......
linux下UsbMon-WireShark之USB协议抓取分析
usbmon配置使用usbmon抓包分的，是需要 内核开启CONFIG_USB_MON=m, 重新编译内核, 编译ko :make ARCH=arm64 CROSS_COMPILE=aarch64-himix100-linux- CONFIG_USB_MON=m M=./drivers/usb/ ......
常用图像像素格式 NV12、NV2、I420、YV12、YUYV
常用图像像素格式 RGB 和 YUV,像素格式描述了像素数据存储所用的格式，定义了像素在内存中的编码方式。RGB 和 YUV 为两种经常使用的像素格式。1.RGB 格式一般较为熟悉，RGB图像具有三个通道 R、G、B，分别对应红、绿、蓝三个分量，由三个分量的值决定颜色；这三种颜色称为 三原色，将它......
Linux支持的UVC视频格式
Linux支持的UVC视频格式位于linux-5.6.11linux-5.6.11driversmediausbuvcuvc_driver.c文件下：其数组结构定义如下：static struct uvc_format_desc uvc_fmts[] = { { .n......
Linux源码分析UVC摄像头的初始化流程分析
UVC摄像头的初始化发生在硬件被接入USB集线器中，设备初USB驱动识别为摄像头的后续初始化流程。和Windows的AddDevice驱动函数一样，Linux设备的创建和侦测是通过int uvc_probe函数实现的。其函数的调用关系如下：//linux/v5.11.11/source/drive......
ubuntu下使用usbmon进行usb抓包
开发或者调试USB设备相关的工具或者驱动，一个调试的利器就是usbmon抓包。 在ubuntu下使用步骤如下：1 运行命令 sudo mount -t debugfs none /sys/kernel/debug ，如果提示已经挂载，则下次抓包就可以不运行这个命令了。表示系统默认会挂载。 2 ......
LINUX&UVC输出终端描述符分析
UVC输出终端描述符用于描述UVC视频流的输出端。关于UVC输出终端描述符各字段的分析详见：https://www.usbzh.com/article/detail-10.htmlUVC输出终端描述符比较简单，没有什么特别的字段。惟一要关注的就是bSourceID。bSourceID：此终端所连接......
YUV2摄像头相关数据大小计算
视备支持的分辨率格式如下：当我们使用YUV2 1280x720x10格式打开摄像头，通过BUSHOUND抓包如下：Length Phase Data ......
LINUX&UVC处理单元描述符
不同的UVC版本，其UVC处理单元描述格式稍有不同。关于UVC处理单元描述符各字段的详细说明可详见：https://www.usbzh.com/article/detail-84.html对于UVC1.1/1.5版本，其内容如下： UINT8 bLength; UINT8 bDescr......
Linux源码分析UVC摄像头的打开流程及抓包分析
和关闭摄像头类似，Linux使用uvc_video_start_streaming函数打开摄像头int uvc_video_start_streaming(struct uvc_streaming *stream){ int ret; ret = uvc_video_clock_init......
DirectShow摄像头视频格式格式UUID-GUID大全
使用DirectShow开发Windows摄像头Capture时，对于每一种支持的格式，都有一个与之对应的UUID.现将各UUID总结整理如下：（后续持续更新）以下UUID来自windows系统uuids.h，目标路径为：C:Program Files (x86)Windows Kits1......
Linux对hidraw设备output report大小的限制
做了个自定义HID设备，可以收发数据，用它来作固件升级。主要是host通过output report下发固件数据，所以output report的size设置的比较大，有4kb，这样升级速度会快一些。经过测试在Windows xp、win7，win10上都木有问题，在linux上出现问题了。设......
USB键盘在Linux环境下一直返回NAK的输入端点和一直OUT数据的输出端点
群里有同学反馈，自己做的USB键盘在Windows下正常，但在Linux下就失败，想让帮忙分析一下原因。一个比较好的消息是他那边有USB总线分析仪，所以只需要抓包就可以进行分析了。最好开他给的抓包截图是样子的：从它的截图可以看到，USB键盘在获取了该键盘的HID报告描述符后，紧跟着一下发Report......
USB中文网出品-UVC视频格式协商协议分析工具
有没有对USB摄像头在打开时数据协商时的UVC视频流接口控制请求的几十个字节分析有时有点郁闷，手动分析又麻烦，写个工具感觉又划不来。有时没办法为，为了定位问题所在，还得手动分析，但这几十个字节在分析时还得不停地查文档。我们知道UVC随着版本的不同，其VS_PROBE_CONTROL和VS_COM......
Windows和Linux不同主机下USB设备枚举过程中的差别
第一次获取设备描述符的不同USB设备刚上电时，是通过端点0使用控制方式来获取设备描述符。不同的设备模式获取端点0的大小不同的：高速模式的端点0最大包长固定为64个字节；全速模式可端点0在8、16、32、64字节中选择；低速模式的端点0最大包长固定为8个字节由于USB主机和USB设备第一次通讯时......
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