hdallintr.h

来自「windows 底层驱动」· C头文件 代码 · 共 40 行

// {4266842A-020B-4ecc-B589-39C35CF27576}
static const GUID HDALL_INTERFACE_GUID = 
{ 0x4266842a, 0x20b, 0x4ecc, { 0xb5, 0x89, 0x39, 0xc3, 0x5c, 0xf2, 0x75, 0x76 } };


#define HDALL_COMMAND_NOTIFY            1
#define HDALL_COMMAND_VERIFY_DRIVER     2

#define HDALL_VERIFICATION_NUMBER 0x4266842B

// HDALL_INTERFACE_S - structure sent to HDALL when an IRP_MN_QUERY_INTERFACE IRP is sent
//
// If the Command is HDALL_COMMAND_VERIFY_DRIVER, then the pointer to then pVerificationNumber 
// is valid and must be filled in with HDALL_VERIFICATION_NUMBER.  This is used to verify that
// we have the correct device object since the call to get HDALL's device object could potentially
// return more than one device object if there is more than one KSCATEGORY_DATADECOMPRESSOR 
// driver loaded.
//
// If the Command is HDALL_COMMAND_NOTIFY then NotificationInfo is valid.  This IRP is sent when 
// the application changes something in the tuner driver, either the input, the mode, or 
// the channel frequency.  Note that when the application changes the channel, it 
// could result in multiple channel frequency calls.  
//

typedef struct _HDALL_INTERFACE
{
    ULONG   Command;
    union _Data
    {
        PULONG  pVerificationNumber;
        struct {
            ULONG   TunerMode;
            ULONG   Channel;
        }NotificationInfo;
    }Data;
}HDALL_INTERFACE, *PHDALL_INTERFACE;