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123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*
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* PROJECT: ReactOS Kernel Streaming Mixer
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* LICENSE: GPL - See COPYING in the top level directory
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* FILE: drivers/wdm/audio/filters/kmixer/kmixer.c
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* PURPOSE: main entry point
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* PROGRAMMERS: Johannes Anderwald (johannes.anderwald@reactos.org)
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*/
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#include "kmixer.h"
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#define YDEBUG
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#include <debug.h>
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NTSTATUS
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NTAPI
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KMix_Pnp(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp)
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{
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PIO_STACK_LOCATION IrpStack;
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IrpStack = IoGetCurrentIrpStackLocation(Irp);
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DPRINT("KMix_Pnp called for func %x\n", IrpStack->MinorFunction);
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if (IrpStack->MinorFunction == IRP_MN_QUERY_PNP_DEVICE_STATE)
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{
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Irp->IoStatus.Information |= PNP_DEVICE_NOT_DISABLEABLE;
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}
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return KsDefaultDispatchPnp(DeviceObject, Irp);
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}
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VOID
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NTAPI
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KMix_Unload(IN PDRIVER_OBJECT DriverObject)
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{
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DPRINT1("SysAudio_Unload called\n");
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}
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NTSTATUS
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NTAPI
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KMix_AddDevice(
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IN PDRIVER_OBJECT DriverObject,
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IN PDEVICE_OBJECT PhysicalDeviceObject)
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{
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NTSTATUS Status;
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UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Device\\kmixer");
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PDEVICE_OBJECT DeviceObject;
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PKMIXER_DEVICE_EXT DeviceExtension;
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PDEVICE_OBJECT NextDeviceObject;
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DPRINT1("KMix_InstallDevice called\n");
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/* create the device */
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Status = IoCreateDevice(DriverObject,
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sizeof(KMIXER_DEVICE_EXT),
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&DeviceName,
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FILE_DEVICE_KS,
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0,
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FALSE,
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&DeviceObject);
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/* check for success */
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if (!NT_SUCCESS(Status))
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{
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DPRINT("Failed to create \\Device\\kmixer !\n");
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return Status;
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}
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DeviceExtension = (PKMIXER_DEVICE_EXT)DeviceObject->DeviceExtension;
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/* initialize device extension */
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RtlZeroMemory(DeviceExtension, sizeof(KMIXER_DEVICE_EXT));
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Status = KMixAllocateDeviceHeader(DeviceExtension);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("KMixAllocateDeviceHeader failed with %x\n", Status);
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goto cleanup;
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}
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/* set io flags */
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DeviceObject->Flags |= DO_DIRECT_IO | DO_POWER_PAGABLE;
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/* clear initializing flag */
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DeviceObject->Flags &= ~ DO_DEVICE_INITIALIZING;
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NextDeviceObject = IoAttachDeviceToDeviceStack(DeviceObject, PhysicalDeviceObject);
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KsSetDevicePnpAndBaseObject(DeviceExtension->KsDeviceHeader, NextDeviceObject, DeviceObject);
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DPRINT("KMix_InstallDevice result %x\n", Status);
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return STATUS_SUCCESS;
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cleanup:
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IoDeleteDevice(DeviceObject);
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return Status;
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}
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NTSTATUS
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NTAPI
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DriverEntry(
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PDRIVER_OBJECT DriverObject,
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PUNICODE_STRING RegistryPathName)
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{
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DPRINT1("KMixer.sys loaded\n");
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KsSetMajorFunctionHandler(DriverObject, IRP_MJ_CREATE);
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KsSetMajorFunctionHandler(DriverObject, IRP_MJ_CLOSE);
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KsSetMajorFunctionHandler(DriverObject, IRP_MJ_WRITE);
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KsSetMajorFunctionHandler(DriverObject, IRP_MJ_DEVICE_CONTROL);
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DriverObject->MajorFunction[IRP_MJ_POWER] = KsDefaultDispatchPower;
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DriverObject->MajorFunction[IRP_MJ_SYSTEM_CONTROL] = KsDefaultForwardIrp;
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DriverObject->MajorFunction[IRP_MJ_PNP] = KMix_Pnp;
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DriverObject->DriverUnload = KMix_Unload;
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DriverObject->DriverExtension->AddDevice = KMix_AddDevice;
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return STATUS_SUCCESS;
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}
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