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reactos/drivers/multimedia/audio/sndblst_sys/sndblst.c

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/*
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS Sound System
* FILE: drivers/multimedia/audio/sndblst/sndblst.c
* PURPOSE: Sound Blaster / Pro / 16 driver
* PROGRAMMER: Andrew Greenwood (silverblade@reactos.org)
*
* UPDATE HISTORY: Feb 25, 2009: New rewrite started
*
*/
/* DEFINES AND INCLUDES ******************************************************/
#include <ntddk.h>
#include <windef.h>
#include <mmsystem.h>
#include <debug.h>
#define CompleteIrpAndReturn(irp, status) \
irp->IoStatus.Status = status; \
irp->IoStatus.Information = 0; \
IoCompleteRequest(Irp, IO_NO_INCREMENT); \
return status;
/* FORWARD DECLARATIONS *****************************************************/
static VOID NTAPI
UnloadSoundBlaster(PDRIVER_OBJECT DriverObject);
/* DEVICE "DISCOVERY" *******************************************************/
/* Nb: These need to go in the helper lib */
typedef NTSTATUS (*SOUNDDEVICEENUMERATIONCALLBACK)(
IN PUNICODE_STRING DeviceRegistryPath);
NTSTATUS
EnumerateSoundDevices(
IN PUNICODE_STRING RegistryPath,
IN PWSTR RegistrySubKey,
IN SOUNDDEVICEENUMERATIONCALLBACK Callback)
{
NTSTATUS Status;
OBJECT_ATTRIBUTES RegAttributes;
HKEY MainKeyHandle, ChildKeyHandle;
UNICODE_STRING UnicodeSubkeyName, DeviceKeyName;
KEY_BASIC_INFORMATION KeyInfo, *FinalKeyInfo;
ULONG i = 0, NeededDataLength = 0, FinalDataLength = 0, NameLength = 0;
/* Turn the subkey name into a Unicode string */
RtlInitUnicodeString(&UnicodeSubkeyName, RegistrySubKey);
/* Open the registry key for the service */
InitializeObjectAttributes(&RegAttributes,
RegistryPath,
OBJ_CASE_INSENSITIVE,
NULL,
(PSECURITY_DESCRIPTOR) NULL);
Status = ZwOpenKey(&MainKeyHandle, KEY_READ, &RegAttributes);
if ( ! NT_SUCCESS(Status) )
{
DPRINT("Failed to open registry key\n");
return Status;
}
/* Open the subkey usually named "Parameters" */
InitializeObjectAttributes(&RegAttributes,
&UnicodeSubkeyName,
OBJ_CASE_INSENSITIVE,
MainKeyHandle,
(PSECURITY_DESCRIPTOR) NULL);
Status = ZwOpenKey(&ChildKeyHandle, KEY_ENUMERATE_SUB_KEYS, &RegAttributes);
/* We're done with the main key now */
ZwClose(MainKeyHandle);
if ( ! NT_SUCCESS(Status) )
{
DPRINT("Failed to open registry subkeys for enumeration\n");
return Status;
}
/* Enumerate through the device keys */
while ( ( Status = ZwEnumerateKey(ChildKeyHandle,
i,
KeyBasicInformation,
&KeyInfo,
sizeof(KEY_BASIC_INFORMATION),
&NeededDataLength) ) != STATUS_NO_MORE_ENTRIES )
{
PWSTR EnumeratedKeyName, StartOfEnumeratedKeyName;
DPRINT("Found subkey %d\n", i);
FinalDataLength = NeededDataLength + FIELD_OFFSET(KEY_BASIC_INFORMATION, Name[0]);
DPRINT("Allocating %d bytes\n", FinalDataLength);
FinalKeyInfo = (PKEY_BASIC_INFORMATION) ExAllocatePool(PagedPool, FinalDataLength);
if ( ! FinalKeyInfo )
{
Status = STATUS_INSUFFICIENT_RESOURCES;
break;
}
/* This time we get the real info */
Status = ZwEnumerateKey(ChildKeyHandle,
i,
KeyBasicInformation,
FinalKeyInfo,
FinalDataLength,
&NeededDataLength);
if ( ! NT_SUCCESS(Status) )
{
DPRINT("FAILED to enumerate key!\n");
}
else
{
NameLength = RegistryPath->Length + sizeof(WCHAR) +
UnicodeSubkeyName.Length + sizeof(WCHAR) +
FinalKeyInfo->NameLength + sizeof(UNICODE_NULL);
DPRINT("Allocating memory for name (%d bytes)\n", NameLength);
EnumeratedKeyName = (PWSTR) ExAllocatePool(PagedPool, NameLength);
if ( ! EnumeratedKeyName )
{
ExFreePool((PVOID)FinalKeyInfo);
Status = STATUS_INSUFFICIENT_RESOURCES;
break;
}
StartOfEnumeratedKeyName = EnumeratedKeyName;
/* Start building the registry path using the service key */
RtlCopyMemory(EnumeratedKeyName,
RegistryPath->Buffer,
RegistryPath->Length);
EnumeratedKeyName += RegistryPath->Length / sizeof(WCHAR);
EnumeratedKeyName[0] = '\\';
++ EnumeratedKeyName;
/* Append the parameters subkey */
RtlCopyMemory(EnumeratedKeyName,
RegistrySubKey,
UnicodeSubkeyName.Length);
EnumeratedKeyName += UnicodeSubkeyName.Length / sizeof(WCHAR);
EnumeratedKeyName[0] = '\\';
++ EnumeratedKeyName;
/* And finally append the enumerated key name */
RtlCopyMemory(EnumeratedKeyName,
FinalKeyInfo->Name,
FinalKeyInfo->NameLength);
EnumeratedKeyName += FinalKeyInfo->NameLength / sizeof(WCHAR);
EnumeratedKeyName[0] = UNICODE_NULL;
/* Reset pointer */
EnumeratedKeyName = StartOfEnumeratedKeyName;
/* Convert into a Unicode string for the callback */
RtlInitUnicodeString(&DeviceKeyName, EnumeratedKeyName);
Callback(&DeviceKeyName);
/* No longer need the key name */
ExFreePool((PVOID)EnumeratedKeyName);
EnumeratedKeyName = NULL;
}
/* No longer need the key info */
ExFreePool((PVOID)FinalKeyInfo);
FinalKeyInfo = NULL;
++ i;
}
/* We're done with enumeration so close this */
ZwClose(ChildKeyHandle);
/* This isn't an error */
if ( Status == STATUS_NO_MORE_ENTRIES )
{
Status = STATUS_SUCCESS;
}
/* No devices configured? */
if ( i == 0 && Status == STATUS_NO_MORE_ENTRIES )
{
Status = STATUS_DEVICE_CONFIGURATION_ERROR;
}
return Status;
}
NTSTATUS
PublishWaveOutDevice(
IN DWORD HardwareDeviceIndex,
IN PWSTR BaseDeviceName,
IN DWORD DeviceIndex,
IN LPWAVEOUTCAPS Capabilities)
{
return STATUS_SUCCESS;
}
typedef struct _SOUND_BLASTER_DEVICE
{
DWORD BasePort;
DWORD MidiUartBasePort;
DWORD Irq;
DWORD DmaChannel_8;
DWORD DmaChannel_16;
DWORD DspVersion;
DWORD ActualDmaBufferSize;
DWORD DmaBufferSize;
} SOUND_BLASTER_DEVICE;
NTSTATUS
AllocateSoundBlasterStructure(OUT SOUND_BLASTER_DEVICE* SoundBlasterDevice)
{
return STATUS_NOT_IMPLEMENTED;
}
/* callback */
/*
Configuration options within the registry:
REG_DWORD Actual Dma Buffer Size 0x00004000
REG_DWORD Configuration Error 0xffffffff
REG_DWORD Dma Buffer Size 0x00004000
REG_DWORD DmaChannel 0x00000001
REG_DWORD DmaChannel16 0x00000005
REG_DWORD DSP Version 0x00000405
REG_DWORD Interrupt 0x00000005
REG_DWORD Load Type 0x00000000
REG_BINARY Mixer Settings ??
REG_DWORD MPU401 Port 0xffffffff
REG_DWORD Port 0x00000220
*/
NTSTATUS
ConfigureSoundBlasterDevice(IN PUNICODE_STRING DeviceRegistryPath)
{
OBJECT_ATTRIBUTES RegAttributes;
NTSTATUS Status = STATUS_SUCCESS;
HKEY ConfigKeyHandle;
DPRINT("Configuring Sound Blaster (config at %S)\n", DeviceRegistryPath->Buffer);
if ( ! DeviceRegistryPath )
{
return STATUS_INVALID_PARAMETER;
}
/* Open the registry key */
InitializeObjectAttributes(&RegAttributes,
DeviceRegistryPath,
OBJ_CASE_INSENSITIVE,
NULL,
(PSECURITY_DESCRIPTOR) NULL);
Status = ZwOpenKey(&ConfigKeyHandle, KEY_READ, &RegAttributes);
if ( ! NT_SUCCESS(Status) )
{
DPRINT("Failed to open config registry key\n");
return Status;
}
/* Read configuration */
DPRINT("Reading configuration\n");
//Status = ZwQueryValueKey(ConfigKeyHandle,
return Status;
}
/* IRP DISPATCHERS **********************************************************/
static NTSTATUS NTAPI
CreateSoundBlaster(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
DPRINT("Sound Blaster driver received IRP_MJ_CREATE\n");
CompleteIrpAndReturn(Irp, STATUS_SUCCESS);
}
static NTSTATUS NTAPI
CloseSoundBlaster(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
DPRINT("Sound Blaster driver received IRP_MJ_CLOSE\n");
CompleteIrpAndReturn(Irp, STATUS_SUCCESS);
}
static NTSTATUS NTAPI
CleanupSoundBlaster(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
DPRINT("Sound Blaster driver received IRP_MJ_CLEANUP\n");
CompleteIrpAndReturn(Irp, STATUS_SUCCESS);
}
static NTSTATUS NTAPI
ControlSoundBlaster(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
DPRINT("Sound Blaster driver received IRP_MJ_CONTROL\n");
CompleteIrpAndReturn(Irp, STATUS_SUCCESS);
}
static NTSTATUS NTAPI
WriteToSoundBlaster(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
DPRINT("Sound Blaster driver received IRP_MJ_WRITE\n");
CompleteIrpAndReturn(Irp, STATUS_SUCCESS);
}
/* DRIVER ENTRYPOINT ********************************************************/
NTSTATUS NTAPI
DriverEntry(
IN PDRIVER_OBJECT DriverObject,
IN PUNICODE_STRING RegistryPath)
{
NTSTATUS Status = STATUS_SUCCESS;
DPRINT("Sound Blaster driver by silverblade\n");
DriverObject->Flags = 0;
DriverObject->MajorFunction[IRP_MJ_CREATE] = CreateSoundBlaster;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = CloseSoundBlaster;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] = CleanupSoundBlaster;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = ControlSoundBlaster;
DriverObject->MajorFunction[IRP_MJ_WRITE] = WriteToSoundBlaster;
DriverObject->DriverUnload = UnloadSoundBlaster;
EnumerateSoundDevices(RegistryPath, L"Parameters", ConfigureSoundBlasterDevice);
return Status;
}
static VOID NTAPI
UnloadSoundBlaster(IN PDRIVER_OBJECT DriverObject)
{
DPRINT("Sound Blaster driver is being unloaded\n");
}
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