kmixer.h File Reference

#include <portcls.h>
#include <float_cast.h>

Include dependency graph for kmixer.h:

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Go to the source code of this file.

Classes
struct	KMIXER_DEVICE_EXT
struct	SUM_NODE_CONTEXT

Macros
#define	KeSaveFloatingPointState(x)   ((void)(x), STATUS_SUCCESS)
#define	KeRestoreFloatingPointState(x)   ((void)0)

Typedefs
typedef struct KMIXER_DEVICE_EXT *	PKMIXER_DEVICE_EXT
typedef struct SUM_NODE_CONTEXT *	PSUM_NODE_CONTEXT

Functions
NTSTATUS NTAPI	KMixAllocateDeviceHeader (IN PKMIXER_DEVICE_EXT DeviceExtension)
NTSTATUS	CreatePin (IN PIRP Irp)

Macro Definition Documentation

KeRestoreFloatingPointState

#define KeRestoreFloatingPointState

(

x

)

((void)0)

Definition at line 33 of file kmixer.h.

KeSaveFloatingPointState

#define KeSaveFloatingPointState

(

x

)

((void)(x), STATUS_SUCCESS)

Definition at line 32 of file kmixer.h.

Typedef Documentation

PKMIXER_DEVICE_EXT

typedef struct KMIXER_DEVICE_EXT * PKMIXER_DEVICE_EXT

PSUM_NODE_CONTEXT

typedef struct SUM_NODE_CONTEXT * PSUM_NODE_CONTEXT

Function Documentation

CreatePin()

NTSTATUS CreatePin

(

IN PIRP

Irp

)

Definition at line 699 of file pin.c.

{
    NTSTATUS Status;
    KSOBJECT_HEADER ObjectHeader;
    PKSDATAFORMAT DataFormat;
    PIO_STACK_LOCATION IoStack;
 
 
    DataFormat = ExAllocatePool(NonPagedPool, sizeof(KSDATAFORMAT_WAVEFORMATEX) * 2);
    if (!DataFormat)
        return STATUS_INSUFFICIENT_RESOURCES;
 
    RtlZeroMemory(DataFormat, sizeof(KSDATAFORMAT_WAVEFORMATEX) * 2);
 
    IoStack = IoGetCurrentIrpStackLocation(Irp);
    IoStack->FileObject->FsContext2 = (PVOID)DataFormat;
 
    /* allocate object header */
    Status = KsAllocateObjectHeader(&ObjectHeader, 0, NULL, Irp, &PinTable);
    return Status;
}

Referenced by DispatchCreateKMixPin().

KMixAllocateDeviceHeader()

NTSTATUS NTAPI KMixAllocateDeviceHeader

(

IN PKMIXER_DEVICE_EXT

DeviceExtension

)

Definition at line 179 of file filter.c.

{
    NTSTATUS Status;
    PKSOBJECT_CREATE_ITEM CreateItem;
 
    /* allocate create item */
    CreateItem = ExAllocatePool(NonPagedPool, sizeof(KSOBJECT_CREATE_ITEM) * 2);
    if (!CreateItem)
        return STATUS_INSUFFICIENT_RESOURCES;
 
    /* initialize create item struct */
    RtlZeroMemory(CreateItem, sizeof(KSOBJECT_CREATE_ITEM) * 2);
    CreateItem[0].Create = DispatchCreateKMix;
    RtlInitUnicodeString(&CreateItem[0].ObjectClass, L"GLOBAL");
    CreateItem[1].Create = DispatchCreateKMix;
    RtlInitUnicodeString(&CreateItem[1].ObjectClass, KSSTRING_Filter);
 
    Status = KsAllocateDeviceHeader(&DeviceExtension->KsDeviceHeader,
                                    2,
                                    CreateItem);
    return Status;
}

Referenced by KMix_AddDevice().