basetopo.cpp

在微软例子下实现的虚拟声卡,实现了各种接口,是学习的一个好例子

Arguments:
    
  PropertyRequest - property request structure

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    DPF_ENTER(("[CMiniportTopologyMSVAD::PropertyHandlerCpuResources]"));

    NTSTATUS ntStatus = STATUS_INVALID_DEVICE_REQUEST;

    if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
    {
        ntStatus = ValidatePropertyParams(PropertyRequest, sizeof(ULONG));
        if (NT_SUCCESS(ntStatus))
        {
            *(PLONG(PropertyRequest->Value)) = KSAUDIO_CPU_RESOURCES_NOT_HOST_CPU;
            PropertyRequest->ValueSize = sizeof(LONG);
        }
    }
    else if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
    {
        ntStatus = 
            PropertyHandler_BasicSupport
            ( 
                PropertyRequest, 
                KSPROPERTY_TYPE_GET | KSPROPERTY_TYPE_BASICSUPPORT,
                VT_ILLEGAL
            );
    }

    return ntStatus;
} // PropertyHandlerCpuResources

//=============================================================================
NTSTATUS                            
CMiniportTopologyMSVAD::PropertyHandlerGeneric
(
    IN  PPCPROPERTY_REQUEST     PropertyRequest
)
/*++

Routine Description:

  Handles all properties for this miniport.

Arguments:

  PropertyRequest - property request structure

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    NTSTATUS                    ntStatus = STATUS_INVALID_DEVICE_REQUEST;

    switch (PropertyRequest->PropertyItem->Id)
    {
        case KSPROPERTY_AUDIO_VOLUMELEVEL:
            ntStatus = PropertyHandlerVolume(PropertyRequest);
            break;
        
        case KSPROPERTY_AUDIO_CPU_RESOURCES:
            ntStatus = PropertyHandlerCpuResources(PropertyRequest);
            break;

        case KSPROPERTY_AUDIO_MUTE:
            ntStatus = PropertyHandlerMute(PropertyRequest);
            break;

        case KSPROPERTY_AUDIO_MUX_SOURCE:
            ntStatus = PropertyHandlerMuxSource(PropertyRequest);
            break;

        default:
            DPF(D_TERSE, ("[PropertyHandlerGeneric: Invalid Device Request]"));
    }

    return ntStatus;
} // PropertyHandlerGeneric

//=============================================================================
NTSTATUS                            
CMiniportTopologyMSVAD::PropertyHandlerMute
(
    IN  PPCPROPERTY_REQUEST     PropertyRequest
)
/*++

Routine Description:

  Property handler for KSPROPERTY_AUDIO_MUTE

Arguments:

  PropertyRequest - property request structure

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    DPF_ENTER(("[CMiniportTopologyMSVAD::PropertyHandlerMute]"));

    NTSTATUS                    ntStatus;
    LONG                        lChannel;
    PBOOL                       pfMute;

    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
    {
        ntStatus = 
            PropertyHandler_BasicSupport
            (
                PropertyRequest,
                KSPROPERTY_TYPE_ALL,
                VT_BOOL
            );
    }
    else
    {
        ntStatus = 
            ValidatePropertyParams
            (   
                PropertyRequest, 
                sizeof(BOOL), 
                sizeof(LONG)
            );
        if (NT_SUCCESS(ntStatus))
        {
            lChannel = * PLONG (PropertyRequest->Instance);
            pfMute   = PBOOL (PropertyRequest->Value);

            if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
            {
                *pfMute = 
                    m_AdapterCommon->MixerMuteRead
                    (
                        PropertyRequest->Node
                    );
                PropertyRequest->ValueSize = sizeof(BOOL);
                ntStatus = STATUS_SUCCESS;
            }
            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
            {
                m_AdapterCommon->MixerMuteWrite
                (
                    PropertyRequest->Node, 
                    *pfMute
                );
                ntStatus = STATUS_SUCCESS;
            }
        }
        else
        {
            DPF(D_TERSE, ("[PropertyHandlerMute - Invalid parameter]"));
            ntStatus = STATUS_INVALID_PARAMETER;
        }
    }

    return ntStatus;
} // PropertyHandlerMute

//=============================================================================
NTSTATUS                            
CMiniportTopologyMSVAD::PropertyHandlerMuxSource
(
    IN  PPCPROPERTY_REQUEST     PropertyRequest
)
/*++

Routine Description:

  PropertyHandler for KSPROPERTY_AUDIO_MUX_SOURCE.

Arguments:

  PropertyRequest - property request structure

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    DPF_ENTER(("[CMiniportTopologyMSVAD::PropertyHandlerMuxSource]"));

    NTSTATUS                    ntStatus = STATUS_INVALID_DEVICE_REQUEST;

    //
    // Validate node
    // This property is only valid for WAVEIN_MUX node.
    //
    // TODO if (WAVEIN_MUX == PropertyRequest->Node)
    {
        if (PropertyRequest->ValueSize >= sizeof(ULONG))
        {
            PULONG pulMuxValue = PULONG(PropertyRequest->Value);
            
            if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
            {
                *pulMuxValue = m_AdapterCommon->MixerMuxRead();
                PropertyRequest->ValueSize = sizeof(ULONG);
                ntStatus = STATUS_SUCCESS;
            }
            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
            {
                m_AdapterCommon->MixerMuxWrite(*pulMuxValue);
                ntStatus = STATUS_SUCCESS;
            }
            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
            {
                ntStatus = 
                    PropertyHandler_BasicSupport
                    ( 
                        PropertyRequest, 
                        KSPROPERTY_TYPE_ALL,
                        VT_I4
                    );
            }
        }
        else
        {
            DPF(D_TERSE, ("[PropertyHandlerMuxSource - Invalid parameter]"));
            ntStatus = STATUS_INVALID_PARAMETER;
        }
    }

    return ntStatus;
} // PropertyHandlerMuxSource

//=============================================================================
NTSTATUS
CMiniportTopologyMSVAD::PropertyHandlerVolume
(
    IN  PPCPROPERTY_REQUEST     PropertyRequest     
)
/*++

Routine Description:

  Property handler for KSPROPERTY_AUDIO_VOLUMELEVEL

Arguments:

  PropertyRequest - property request structure

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    DPF_ENTER(("[CMiniportTopologyMSVAD::PropertyHandlerVolume]"));

    NTSTATUS                    ntStatus = STATUS_INVALID_DEVICE_REQUEST;
    LONG                        lChannel;
    PULONG                      pulVolume;

    if (PropertyRequest->Verb & KSPROPERTY_TYPE_BASICSUPPORT)
    {
        ntStatus = PropertyHandlerBasicSupportVolume(PropertyRequest);
    }
    else
    {
        ntStatus = 
            ValidatePropertyParams
            (
                PropertyRequest, 
                sizeof(ULONG), 
                sizeof(KSNODEPROPERTY_AUDIO_CHANNEL)
            );
        if (NT_SUCCESS(ntStatus))
        {
            lChannel = * (PLONG (PropertyRequest->Instance));
            pulVolume = PULONG (PropertyRequest->Value);

            if (PropertyRequest->Verb & KSPROPERTY_TYPE_GET)
            {
                *pulVolume = 
                    m_AdapterCommon->MixerVolumeRead
                    (
                        PropertyRequest->Node, 
                        lChannel
                    );
                PropertyRequest->ValueSize = sizeof(ULONG);                
                ntStatus = STATUS_SUCCESS;
            }
            else if (PropertyRequest->Verb & KSPROPERTY_TYPE_SET)
            {
                m_AdapterCommon->MixerVolumeWrite
                (
                    PropertyRequest->Node, 
                    lChannel, 
                    *pulVolume
                );
                ntStatus = STATUS_SUCCESS;
            }
        }
        else
        {
            DPF(D_TERSE, ("[PropertyHandlerVolume - Invalid parameter]"));
            ntStatus = STATUS_INVALID_PARAMETER;
        }
    }

    return ntStatus;
} // PropertyHandlerVolume

#pragma code_seg()