131 lines
1.7 KiB
C
131 lines
1.7 KiB
C
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/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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wdm.c
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Abstract:
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This is the WDM DX mapper driver.
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Author:
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billpa
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Environment:
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Kernel mode only
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Revision History:
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--*/
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#include "wdm.h"
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#include "basedef.h"
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#include "vmm.h"
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#include "dxapi.h"
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#include "dxmapper.h"
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#ifdef ALLOC_PRAGMA
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#pragma alloc_text(PAGE, DriverEntry)
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#endif
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BOOLEAN DsoundOk = FALSE;
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NTSTATUS
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DriverEntry(
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IN PDRIVER_OBJECT DriverObject,
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IN PUNICODE_STRING RegistryPath
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)
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/*++
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Routine Description:
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Entry point for explicitely loaded stream class.
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Arguments:
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DriverObject - Pointer to the driver object created by the system.
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RegistryPath - unused.
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Return Value:
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STATUS_SUCCESS
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--*/
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{
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UNREFERENCED_PARAMETER(DriverObject);
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DEBUG_BREAKPOINT();
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return STATUS_SUCCESS;
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}
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ULONG
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DxApiGetVersion(
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)
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/*++
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Routine Description:
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Arguments:
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Return Value:
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--*/
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{
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return (DXCheckDSoundVersion());
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}
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ULONG
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DxApi(
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IN ULONG dwFunctionNum,
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IN PVOID lpvInBuffer,
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IN ULONG cbInBuffer,
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IN PVOID lpvOutBuffer,
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IN ULONG cbOutBuffer
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)
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/*++
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Routine Description:
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Arguments:
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Return Value:
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--*/
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{
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DEBUG_BREAKPOINT();
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//
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// if we haven't checked if DSOUND is present and the right version,
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// (or if we've checked before and failed) check and return error if not
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// loaded or correct version.
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//
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if (!DsoundOk) {
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DEBUG_BREAKPOINT();
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if (DXCheckDSoundVersion() < DXVERSION) {
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DEBUG_BREAKPOINT();
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return 0;
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} else {
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DsoundOk = TRUE;
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}
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}
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return DXIssueIoctl( dwFunctionNum, lpvInBuffer, cbInBuffer,
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lpvOutBuffer, cbOutBuffer );
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}
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