NTSTATUS
WdmAudMixerInitialize(
IN PDEVICE_OBJECT DeviceObject)
{
MIXER_STATUS Status;
/* initialize the mixer library */
Status = MMixerInitialize(&MixerContext, Enum, (PVOID)DeviceObject);
if (Status != MM_STATUS_SUCCESS)
{
/* failed to initialize mmixer library */
DPRINT("MMixerInitialize failed with %lx\n", Status);
}
return Status;
}
BOOL
WdmAudInitUserModeMixer()
{
HDEVINFO DeviceHandle;
MIXER_STATUS Status;
if (MMixerLibraryInitialized)
{
/* library is already initialized */
return TRUE;
}
/* create a device list */
DeviceHandle = SetupDiGetClassDevs(&CategoryGuid,
NULL,
NULL,
DIGCF_DEVICEINTERFACE/* FIXME |DIGCF_PRESENT*/);
if (DeviceHandle == INVALID_HANDLE_VALUE)
{
/* failed to create a device list */
return FALSE;
}
/* initialize the mixer library */
Status = MMixerInitialize(&MixerContext, Enum, (PVOID)DeviceHandle);
/* free device list */
SetupDiDestroyDeviceInfoList(DeviceHandle);
if (Status != MM_STATUS_SUCCESS)
{
/* failed to initialize mixer library */
DPRINT1("Failed to initialize mixer library with %x\n", Status);
return FALSE;
}
/* library is now initialized */
MMixerLibraryInitialized = TRUE;
/* completed successfully */
return TRUE;
}
