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/*++
Copyright (c) Microsoft Corporation All Rights Reserved
Module Name:
AudioModule0.h
Abstract:
Declaration of Audio Module 0 (system module).
--*/
#ifndef _SYSVAD_AUDIOMODULE0_H_
#define _SYSVAD_AUDIOMODULE0_H_
#include "AudioModuleHelper.h"
#define AUDIOMODULE0_MAJOR 0x1
#define AUDIOMODULE0_MINOR 0X0
static const GUID AudioModule0Id =
{ 0xe24c8b6f, 0xede7, 0x4255, 0x8b, 0x39, 0x77, 0x97, 0x60, 0x15, 0xd5, 0x93 };
enum AudioModule0_Parameter {
AudioModule0Parameter1 = 0,
AudioModule0Parameter2
};
typedef struct _AUDIOMODULE0_CUSTOM_COMMAND {
ULONG Verb; // get, set and support
AudioModule0_Parameter ParameterId;
} AUDIOMODULE0_CUSTOM_COMMAND, *PAUDIOMODULE0_CUSTOM_COMMAND;
enum AudioModule0_Notification_Type {
AudioModule0ParameterChanged = 0,
};
typedef struct _AUDIOMODULE0_CUSTOM_NOTIFICATION {
ULONG Type;
union {
struct {
ULONG ParameterId;
} ParameterChanged;
};
} AUDIOMODULE0_CUSTOM_NOTIFICATION, *PAUDIOMODULE0_CUSTOM_NOTIFICATION;
typedef struct _AUDIOMODULE0_NOTIFICATION {
KSAUDIOMODULE_NOTIFICATION Header;
AUDIOMODULE0_CUSTOM_NOTIFICATION CustomNotification;
} AUDIOMODULE0_NOTIFICATION, *PAUDIOMODULE0_NOTIFICATION;
typedef struct _AUDIOMODULE0_CONTEXT {
ULONG Parameter1;
BYTE Parameter2;
ULONG InstanceId;
AUDIOMODULE0_NOTIFICATION Notification;
PPORTCLSNOTIFICATIONS PortNotifications;
} AUDIOMODULE0_CONTEXT, *PAUDIOMODULE0_CONTEXT;
static
ULONG AudioModule0_ValidParameter1List[] =
{
1, 2, 5
};
static
AUDIOMODULE_PARAMETER_INFO AudioModule0_ParameterInfo[] =
{
{
KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_SET | KSPROPERTY_TYPE_BASICSUPPORT,
AUDIOMODULE_PARAMETER_FLAG_CHANGE_NOTIFICATION,
(ULONG)RTL_FIELD_SIZE(AUDIOMODULE0_CONTEXT, Parameter1),
VT_UI4,
AudioModule0_ValidParameter1List,
SIZEOF_ARRAY(AudioModule0_ValidParameter1List)
},
{
KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
0,
(ULONG)RTL_FIELD_SIZE(AUDIOMODULE0_CONTEXT, Parameter2),
VT_UI1,
NULL,
0
},
};
inline
#pragma code_seg("PAGE")
NTSTATUS
AudioModule0_InitClass(
_In_ const AUDIOMODULE_DESCRIPTOR * Module,
_Inout_opt_ PVOID Context,
_In_ size_t Size,
_In_ KSAUDIOMODULE_NOTIFICATION * NotificationHeader,
_In_opt_ PPORTCLSNOTIFICATIONS PortNotifications
)
{
PAUDIOMODULE0_CONTEXT ctx = (PAUDIOMODULE0_CONTEXT)Context;
UNREFERENCED_PARAMETER(Module);
PAGED_CODE();
if (Context == NULL)
{
ASSERT(FALSE); // this should not happen.
return STATUS_INTERNAL_ERROR;
}
ASSERT(Size != 0);
RtlZeroMemory(Context, Size);
ctx->Notification.Header = *NotificationHeader;
ctx->PortNotifications = PortNotifications;
if (ctx->PortNotifications != NULL)
{
ctx->PortNotifications->AddRef();
}
return STATUS_SUCCESS;
}
inline
#pragma code_seg("PAGE")
NTSTATUS
AudioModule0_InitInstance(
_In_ const AUDIOMODULE_DESCRIPTOR * Module,
_In_opt_ PVOID TemplateContext,
_Inout_opt_ PVOID Context,
_In_ size_t Size,
_In_ ULONG InstanceId
)
{
PAUDIOMODULE0_CONTEXT ctx = (PAUDIOMODULE0_CONTEXT)Context;
UNREFERENCED_PARAMETER(Module);
PAGED_CODE();
if (Context == NULL)
{
ASSERT(FALSE); // this should not happen.
return STATUS_INTERNAL_ERROR;
}
ASSERT(TemplateContext != NULL);
ASSERT(Size != 0);
RtlCopyMemory(Context, TemplateContext, Size);
ctx->InstanceId = InstanceId;
ctx->Notification.Header.ProviderId.InstanceId = InstanceId;
if (ctx->PortNotifications != NULL)
{
ctx->PortNotifications->AddRef();
}
return STATUS_SUCCESS;
}
inline
#pragma code_seg("PAGE")
VOID
AudioModule0_Cleanup(
_In_ PVOID Context
)
{
PAUDIOMODULE0_CONTEXT ctx = (PAUDIOMODULE0_CONTEXT)Context;
PAGED_CODE();
if (Context == NULL)
{
ASSERT(FALSE); // this should not happen.
return;
}
SAFE_RELEASE(ctx->PortNotifications);
}
inline
#pragma code_seg("PAGE")
NTSTATUS
AudioModule0_Handler(
_Inout_opt_ PVOID Context,
_In_reads_bytes_(InBufferCb) PVOID InBuffer,
_In_ ULONG InBufferCb,
_Out_writes_bytes_opt_(*OutBufferCb) PVOID OutBuffer,
_Inout_ ULONG * OutBufferCb
)
{
NTSTATUS status = STATUS_SUCCESS;
BOOL fNewValue = FALSE;
PVOID currentValue;
PVOID inBuffer = NULL;
ULONG inBufferCb = 0;
PAUDIOMODULE0_CONTEXT ctx = (PAUDIOMODULE0_CONTEXT)Context;
AUDIOMODULE_PARAMETER_INFO * parameterInfo = NULL;
AUDIOMODULE0_CUSTOM_COMMAND * command = NULL;
PAGED_CODE();
if (ctx == NULL)
{
ASSERT(FALSE); // this should not happen.
status = STATUS_INTERNAL_ERROR;
goto exit;
}
//
// Basic parameter validation (module specific).
//
if (InBuffer == NULL || InBufferCb == 0)
{
return STATUS_INVALID_PARAMETER;
}
if (InBufferCb < sizeof(AUDIOMODULE0_CUSTOM_COMMAND))
{
return STATUS_INVALID_PARAMETER;
}
command = (AUDIOMODULE0_CUSTOM_COMMAND*)InBuffer;
//
// Validate the parameter referenced in the command.
//
switch (command->ParameterId)
{
case AudioModule0Parameter1:
currentValue = &ctx->Parameter1;
parameterInfo = &AudioModule0_ParameterInfo[AudioModule0Parameter1];
break;
case AudioModule0Parameter2:
currentValue = &ctx->Parameter2;
parameterInfo = &AudioModule0_ParameterInfo[AudioModule0Parameter2];
break;
default:
status = STATUS_INVALID_PARAMETER;
goto exit;
}
//
// Update input buffer ptr/size.
//
inBuffer = (PVOID)((ULONG_PTR)InBuffer + sizeof(AUDIOMODULE0_CUSTOM_COMMAND));
inBufferCb = InBufferCb - sizeof(AUDIOMODULE0_CUSTOM_COMMAND);
if (inBufferCb == 0)
{
inBuffer = NULL;
}
status = AudioModule_GenericHandler(
command->Verb,
command->ParameterId,
parameterInfo,
currentValue,
inBuffer,
inBufferCb,
OutBuffer,
OutBufferCb,
&fNewValue);
if (!NT_SUCCESS(status))
{
goto exit;
}
if (fNewValue && ctx->PortNotifications &&
(parameterInfo->Flags & AUDIOMODULE_PARAMETER_FLAG_CHANGE_NOTIFICATION))
{
// This logic assumes that access to this function is serialized.
ctx->Notification.CustomNotification.Type = AudioModule0ParameterChanged;
ctx->Notification.CustomNotification.ParameterChanged.ParameterId =
command->ParameterId;
AudioModule_SendNotification(ctx->PortNotifications,
(PVOID)&ctx->Notification,
(USHORT)sizeof(ctx->Notification));
}
// Normalize error code.
status = STATUS_SUCCESS;
exit:
return status;
}
#endif // _SYSVAD_AUDIOMODULE0_H_
|
