mirror of
https://github.com/reactos/reactos.git
synced 2024-10-29 19:13:58 +00:00
250 lines
7.7 KiB
C
250 lines
7.7 KiB
C
/*
|
|
* COPYRIGHT: See COPYING in the top level directory
|
|
* PROJECT: ReactOS Kernel Streaming
|
|
* FILE: drivers/wdm/audio/legacy/wdmaud/deviface.c
|
|
* PURPOSE: System Audio graph builder
|
|
* PROGRAMMER: Andrew Greenwood
|
|
* Johannes Anderwald
|
|
*/
|
|
|
|
#include "wdmaud.h"
|
|
|
|
#define NDEBUG
|
|
#include <debug.h>
|
|
|
|
NTSTATUS
|
|
WdmAudOpenSysAudioDevice(
|
|
IN LPWSTR DeviceName,
|
|
OUT PHANDLE Handle)
|
|
{
|
|
UNICODE_STRING SymbolicLink;
|
|
OBJECT_ATTRIBUTES ObjectAttributes;
|
|
IO_STATUS_BLOCK IoStatusBlock;
|
|
NTSTATUS Status;
|
|
|
|
RtlInitUnicodeString(&SymbolicLink, DeviceName);
|
|
InitializeObjectAttributes(&ObjectAttributes, &SymbolicLink, OBJ_OPENIF | OBJ_KERNEL_HANDLE, NULL, NULL);
|
|
|
|
Status = IoCreateFile(Handle,
|
|
SYNCHRONIZE | GENERIC_READ | GENERIC_WRITE,
|
|
&ObjectAttributes,
|
|
&IoStatusBlock,
|
|
NULL,
|
|
0,
|
|
0,
|
|
FILE_OPEN,
|
|
FILE_SYNCHRONOUS_IO_NONALERT,
|
|
NULL,
|
|
0,
|
|
CreateFileTypeNone,
|
|
NULL,
|
|
IO_NO_PARAMETER_CHECKING | IO_FORCE_ACCESS_CHECK);
|
|
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
DeviceInterfaceChangeCallback(
|
|
IN PVOID NotificationStructure,
|
|
IN PVOID Context)
|
|
{
|
|
DEVICE_INTERFACE_CHANGE_NOTIFICATION * Event = (DEVICE_INTERFACE_CHANGE_NOTIFICATION*)NotificationStructure;
|
|
|
|
DPRINT1("DeviceInterfaceChangeCallback called %p\n", Event);
|
|
DbgBreakPoint();
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS
|
|
WdmAudOpenSysAudioDeviceInterfaces(
|
|
IN PWDMAUD_DEVICE_EXTENSION DeviceExtension,
|
|
IN LPWSTR SymbolicLinkList)
|
|
{
|
|
SYSAUDIO_ENTRY * Entry;
|
|
ULONG Length;
|
|
|
|
DPRINT1("WdmAudOpenSysAudioDeviceInterfaces called\n");
|
|
|
|
while(*SymbolicLinkList)
|
|
{
|
|
Length = wcslen(SymbolicLinkList) + 1;
|
|
Entry = (SYSAUDIO_ENTRY*)AllocateItem(NonPagedPool, sizeof(SYSAUDIO_ENTRY) + Length * sizeof(WCHAR));
|
|
if (!Entry)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Entry->SymbolicLink.Length = Length * sizeof(WCHAR);
|
|
Entry->SymbolicLink.MaximumLength = Length * sizeof(WCHAR);
|
|
Entry->SymbolicLink.Buffer = (LPWSTR) (Entry + 1);
|
|
wcscpy(Entry->SymbolicLink.Buffer, SymbolicLinkList);
|
|
|
|
InsertTailList(&DeviceExtension->SysAudioDeviceList, &Entry->Entry);
|
|
|
|
DeviceExtension->NumSysAudioDevices++;
|
|
SymbolicLinkList += Length;
|
|
}
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
NTSTATUS
|
|
WdmAudOpenSysAudioDevices(
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN PWDMAUD_DEVICE_EXTENSION DeviceExtension)
|
|
{
|
|
NTSTATUS Status = STATUS_SUCCESS;
|
|
LPWSTR SymbolicLinkList;
|
|
SYSAUDIO_ENTRY * Entry;
|
|
ULONG Length;
|
|
HANDLE hSysAudio;
|
|
PFILE_OBJECT FileObject;
|
|
UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Device\\sysaudio\\GLOBAL");
|
|
|
|
if (DeviceExtension->DeviceInterfaceSupport)
|
|
{
|
|
Status = IoGetDeviceInterfaces(&KSCATEGORY_SYSAUDIO,
|
|
NULL,
|
|
0,
|
|
&SymbolicLinkList);
|
|
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
WdmAudOpenSysAudioDeviceInterfaces(DeviceExtension, SymbolicLinkList);
|
|
FreeItem(SymbolicLinkList);
|
|
}
|
|
|
|
|
|
Status = IoRegisterPlugPlayNotification(EventCategoryDeviceInterfaceChange,
|
|
PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES,
|
|
(PVOID)&KSCATEGORY_SYSAUDIO,
|
|
DeviceObject->DriverObject,
|
|
DeviceInterfaceChangeCallback,
|
|
(PVOID)DeviceExtension,
|
|
&DeviceExtension->SysAudioNotification);
|
|
}
|
|
else
|
|
{
|
|
Entry = (SYSAUDIO_ENTRY*)AllocateItem(NonPagedPool, sizeof(SYSAUDIO_ENTRY));
|
|
if (!Entry)
|
|
{
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
|
|
Length = wcslen(DeviceName.Buffer) + 1;
|
|
Entry->SymbolicLink.Length = 0;
|
|
Entry->SymbolicLink.MaximumLength = Length * sizeof(WCHAR);
|
|
Entry->SymbolicLink.Buffer = AllocateItem(NonPagedPool, Entry->SymbolicLink.MaximumLength);
|
|
|
|
if (!Entry->SymbolicLink.Buffer)
|
|
{
|
|
FreeItem(Entry);
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
Status = RtlAppendUnicodeStringToString(&Entry->SymbolicLink, &DeviceName);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
FreeItem(Entry->SymbolicLink.Buffer);
|
|
FreeItem(Entry);
|
|
return Status;
|
|
}
|
|
|
|
DPRINT("Opening device %S\n", Entry->SymbolicLink.Buffer);
|
|
Status = WdmAudOpenSysAudioDevice(Entry->SymbolicLink.Buffer, &hSysAudio);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Failed to open sysaudio %x\n", Status);
|
|
FreeItem(Entry->SymbolicLink.Buffer);
|
|
FreeItem(Entry);
|
|
return Status;
|
|
}
|
|
|
|
InsertTailList(&DeviceExtension->SysAudioDeviceList, &Entry->Entry);
|
|
DeviceExtension->NumSysAudioDevices++;
|
|
|
|
/* get the file object */
|
|
Status = ObReferenceObjectByHandle(hSysAudio, FILE_READ_DATA | FILE_WRITE_DATA, *IoFileObjectType, KernelMode, (PVOID*)&FileObject, NULL);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Failed to reference FileObject %x\n", Status);
|
|
ZwClose(hSysAudio);
|
|
return Status;
|
|
}
|
|
DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
|
|
DeviceExtension->hSysAudio = hSysAudio;
|
|
DeviceExtension->FileObject = FileObject;
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS
|
|
WdmAudRegisterDeviceInterface(
|
|
IN PDEVICE_OBJECT PhysicalDeviceObject,
|
|
IN PWDMAUD_DEVICE_EXTENSION DeviceExtension)
|
|
{
|
|
NTSTATUS Status;
|
|
UNICODE_STRING SymbolicLinkName;
|
|
|
|
Status = IoRegisterDeviceInterface(PhysicalDeviceObject, &KSCATEGORY_WDMAUD, NULL, &SymbolicLinkName);
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
IoSetDeviceInterfaceState(&SymbolicLinkName, TRUE);
|
|
RtlFreeUnicodeString(&SymbolicLinkName);
|
|
//DeviceExtension->DeviceInterfaceSupport = TRUE;
|
|
return Status;
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
NTSTATUS
|
|
WdmAudOpenSysaudio(
|
|
IN PDEVICE_OBJECT DeviceObject,
|
|
IN PWDMAUD_CLIENT *pClient)
|
|
{
|
|
PWDMAUD_CLIENT Client;
|
|
PWDMAUD_DEVICE_EXTENSION DeviceExtension;
|
|
|
|
/* get device extension */
|
|
DeviceExtension = (PWDMAUD_DEVICE_EXTENSION)DeviceObject->DeviceExtension;
|
|
|
|
if (!DeviceExtension->NumSysAudioDevices)
|
|
{
|
|
/* wdmaud failed to open sysaudio */
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
/* sanity check */
|
|
ASSERT(!IsListEmpty(&DeviceExtension->SysAudioDeviceList));
|
|
|
|
/* allocate client context struct */
|
|
Client = AllocateItem(NonPagedPool, sizeof(WDMAUD_CLIENT));
|
|
|
|
/* check for allocation failure */
|
|
if (!Client)
|
|
{
|
|
/* not enough memory */
|
|
return STATUS_INSUFFICIENT_RESOURCES;
|
|
}
|
|
|
|
/* zero client context struct */
|
|
RtlZeroMemory(Client, sizeof(WDMAUD_CLIENT));
|
|
|
|
/* initialize mixer event list */
|
|
InitializeListHead(&Client->MixerEventList);
|
|
|
|
/* store result */
|
|
*pClient = Client;
|
|
|
|
/* insert client into list */
|
|
ExInterlockedInsertTailList(&DeviceExtension->WdmAudClientList, &Client->Entry, &DeviceExtension->Lock);
|
|
|
|
/* done */
|
|
return STATUS_SUCCESS;
|
|
}
|