UVC H264视频帧描述符

H264视频格式结构体定义

typedef struct _H264_VIDEO_FORMAT_DESCRIPTOR
{
    UINT8  bLength;  
    UINT8  bDescriptorType;
    UINT8  bDescriptorSubtype;
    UINT8  bFormatIndex;
    UINT8  bNumberFrameDescriptor;
    GUID   guidFormat; //UINT[16]
    UINT8  bBitsPerPixel;
    UINT8  bDefaultFrameIndex;
    UINT8  bAspectRatioX;
    UINT8  bAspectRatioY;
    UINT8  bmInterlaceFlags;
    UINT8  bCopyProtect;
    UINT8  bVariableSize;    
}H264_VIDEO_FORMAT_DESCRIPTOR;

bLength                  : 0x1C (28 bytes)
bDescriptorType          : 0x24 (Video Streaming Interface)
bDescriptorSubtype       : 0x10 (Frame Based Format Type)
bFormatIndex             : 0x03 (3)
bNumFrameDescriptors     : 0x03 (3)
guidFormat               : {34363248-0000-0010-8000-00AA00389B71} (H264)
bBitsPerPixel            : 0x10 (16 bits)
bDefaultFrameIndex       : 0x03 (3)
bAspectRatioX            : 0x00
bAspectRatioY            : 0x00
bmInterlaceFlags         : 0x00
 D0 IL stream or variable: 0 (no)
 D1 Fields per frame     : 0 (2 fields)
 D2 Field 1 first        : 0 (no)
 D3 Reserved             : 0
 D4..5 Field pattern     : 0 (Field 1 only)
 D6..7 Display Mode      : 0 (Bob only)
bCopyProtect             : 0x00 (No restrictions)
bVariableSize            : 0x01 (Variable Size)
Data (HexDump)           : 1C 24 10 03 03 48 32 36 34 00 00 10 00 80 00 00   .$...H264.......
                           AA 00 38 9B 71 10 03 00 00 00 00 01               ..8.q.......


OUR_GUID_ENTRY(MEDIASUBTYPE_H264,
0x34363248, 0x0000, 0x0010, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71)

H264视频帧格式

#pragma pack(1)
typedef struct _H264_VIDEO_FRAME_DESCRIPTOR
{
    UINT8  bLength;
    UINT8  bDescriptorType;
    UINT8  bDescriptorSubtype;
    UINT8  bFrameIndex;
    UINT8  bmCapabilities;
    UINT16 wWidth;
    UINT16 wHeight;
    UINT32 dwMinBitRate;
    UINT32 dwMaxBitRate;
    UINT32 dwDefaultFrameInterval;
    UINT8  bFrameIntervalType;
    UINT32 dwBytesPerLine;
    UINT32 adwFrameInterval[1];
} H264_VIDEO_FRAME_DESCRIPTOR;
#pragma pack()

        ----- VS Frame Based Payload Frame Type Descriptor ----
bLength                  : 0x26 (38 bytes)
bDescriptorType          : 0x24 (Video Streaming Interface)
bDescriptorSubtype       : 0x11 (Frame Based Payload Frame Type)
bFrameIndex              : 0x03
bmCapabilities           : 0x00
wWidth                   : 0x0780 (1920)
wHeight                  : 0x0438 (1080)
dwMinBitRate             : 0x13C68000 (331776000 bps -> 41.472 MB/s)
dwMaxBitRate             : 0x3B538000 (995328000 bps -> 124.416 MB/s)
dwDefaultFrameInterval   : 0x00051615 (33.3333 ms -> 30.000 fps)
bFrameIntervalType       : 0x03 (3 discrete frame intervals supported)
dwBytesPerLine           : 0x00 (0 bytes)
adwFrameInterval[1]      : 0x00051615 (33.3333 ms -> 30.000 fps)
adwFrameInterval[2]      : 0x000A2C2A (66.6666 ms -> 15.000 fps)
adwFrameInterval[3]      : 0x000F4240 (100.0000 ms -> 10.000 fps)
Data (HexDump)           : 26 24 11 03 00 80 07 38 04 00 80 C6 13 00 80 53   &$.....8.......S
                           3B 15 16 05 00 03 00 00 00 00 15 16 05 00 2A 2C   ;.............*,
                           0A 00 40 42 0F 00                                 ..@B..