KS-CAMERA相机工作流程

IRP_MJ_CREATE

• FileName:\global

• FileName:{146F1A80-4791-11D0-A5D6-28DB04C10000}\KSPIN_CONNECT\KSDATAFORMAT

• KSPIN_CONNECT

  typedef struct {
    KSPIN_INTERFACE Interface;
    KSPIN_MEDIUM    Medium;
    ULONG           PinId;
    HANDLE          PinToHandle;
    KSPRIORITY      Priority;
  } KSPIN_CONNECT, *PKSPIN_CONNECT;
  

• KSDATAFORMAT

typedef struct {
    ULONG   FormatSize;
    ULONG   Flags;
    ULONG   SampleSize;
    ULONG   Reserved;
    GUID    MajorFormat;
    GUID    SubFormat;
    GUID    Specifier;
} KSDATAFORMAT, *PKSDATAFORMAT, KSDATARANGE, *PKSDATARANGE;

KSDATAFORMAT其实是下面格种格式的公共头，根据格式的不同，使用的结构体不同。

可扩展的结构体如下：

typedef struct tagKS_DATAFORMAT_VIDEOINFOHEADER {
    KSDATAFORMAT            DataFormat;
    KS_VIDEOINFOHEADER      VideoInfoHeader;
} KS_DATAFORMAT_VIDEOINFOHEADER, *PKS_DATAFORMAT_VIDEOINFOHEADER;

typedef struct tagKS_DATAFORMAT_VIDEOINFOHEADER2 {
    KSDATAFORMAT            DataFormat;
    KS_VIDEOINFOHEADER2     VideoInfoHeader2;
} KS_DATAFORMAT_VIDEOINFOHEADER2, *PKS_DATAFORMAT_VIDEOINFOHEADER2;

typedef struct tagKS_DATAFORMAT_MPEGVIDEOINFO2 {
    KSDATAFORMAT            DataFormat;
    KS_MPEGVIDEOINFO2       MpegVideoInfoHeader2;
} KS_DATAFORMAT_MPEGVIDEOINFO2, *PKS_DATAFORMAT_MPEGVIDEOINFO2;

typedef struct tagKS_DATAFORMAT_H264VIDEOINFO {
    KSDATAFORMAT            DataFormat;
    KS_H264VIDEOINFO        H264VideoInfoHeader;
} KS_DATAFORMAT_H264VIDEOINFO, *PKS_DATAFORMAT_H264VIDEOINFO;

typedef struct tagKS_DATAFORMAT_IMAGEINFO {
    KSDATAFORMAT            DataFormat;
    KS_BITMAPINFOHEADER     ImageInfoHeader;
} KS_DATAFORMAT_IMAGEINFO, *PKS_DATAFORMAT_IMAGEINFO;


typedef struct tagKS_DATAFORMAT_VIDEOINFO_PALETTE {
    KSDATAFORMAT            DataFormat;
    KS_VIDEOINFO            VideoInfo;
} KS_DATAFORMAT_VIDEOINFO_PALETTE, *PKS_DATAFORMAT_VIDEOINFO_PALETTE;

typedef struct tagKS_DATAFORMAT_VBIINFOHEADER {
    KSDATAFORMAT            DataFormat;
    KS_VBIINFOHEADER        VBIInfoHeader;
} KS_DATAFORMAT_VBIINFOHEADER, *PKS_DATAFORMAT_VBIINFOHEADER;

IRP_MJ_DEVICE_CONTROL

• ioctl: IOCTL_KS_PROPERTY
  • request: Connection KSPROPERTY_CONNECTION_STATE
  • set type: KSSTATE_ACQUIRE
• ioctl : IOCTL_KS_PROPERTY
  • request: Connection KSPROPERTY_CONNECTION_STATE
  • set type: KSSTATE_PAUSE

• ioctl: IOCTL_KS_PROPERTY

  • request: Connection KSPROPERTY_CONNECTION_STATE
  • set type: KSSTATE_RUN

• ioctl: IOCTL_KS_READ_STREAM
  ….

• IOCTL_KS_PROPERTY
  • request: Connection KSPROPERTY_CONNECTION_STATE
  • set type: KSSTATE_STOP

IRP_MJ_CLEANUP

IRP_MJ_CLEANUP

IRP_MJ_CLOSE

IRP_MJ_CLOSE