/*++

Copyright (c) 1997-2000  Microsoft Corporation All Rights Reserved

Module Name:

    minwave.cpp

Abstract:

    Implementation of wavecyclic miniport.

--*/

#include <msvad.h>
#include <common.h>
#include "pcmex.h"
#include "minwave.h"
#include "wavtable.h"

#pragma code_seg("PAGE")

//=============================================================================
// CMiniportWaveCyclic
//=============================================================================

//=============================================================================
NTSTATUS
CreateMiniportWaveCyclicMSVAD
( 
    OUT PUNKNOWN *              Unknown,
    IN  REFCLSID,
    IN  PUNKNOWN                UnknownOuter OPTIONAL,
    IN  POOL_TYPE               PoolType 
)
/*++

Routine Description:

  Create the wavecyclic miniport.

Arguments:

  Unknown - 

  RefClsId -

  UnknownOuter -

  PoolType -

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    ASSERT(Unknown);

    STD_CREATE_BODY(CMiniportWaveCyclic, Unknown, UnknownOuter, PoolType);
}

//=============================================================================
CMiniportWaveCyclic::~CMiniportWaveCyclic
( 
    void 
)
/*++

Routine Description:

  Destructor for wavecyclic miniport

Arguments:

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    DPF_ENTER(("[CMiniportWaveCyclic::~CMiniportWaveCyclic]"));
} // ~CMiniportWaveCyclic


//=============================================================================
STDMETHODIMP_(NTSTATUS)
CMiniportWaveCyclic::DataRangeIntersection
( 
    IN  ULONG                       PinId,
    IN  PKSDATARANGE                ClientDataRange,
    IN  PKSDATARANGE                MyDataRange,
    IN  ULONG                       OutputBufferLength,
    OUT PVOID                       ResultantFormat,
    OUT PULONG                      ResultantFormatLength 
)
/*++

Routine Description:

  The DataRangeIntersection function determines the highest quality 
  intersection of two data ranges.

Arguments:

  PinId -           Pin for which data intersection is being determined. 

  ClientDataRange - Pointer to KSDATARANGE structure which contains the data 
                    range submitted by client in the data range intersection 
                    property request. 

  MyDataRange -         Pin's data range to be compared with client's data 
                        range. In this case we actually ignore our own data 
                        range, because we know that we only support one range.

  OutputBufferLength -  Size of the buffer pointed to by the resultant format 
                        parameter. 

  ResultantFormat -     Pointer to value where the resultant format should be 
                        returned. 

  ResultantFormatLength -   Actual length of the resultant format placed in 
                            ResultantFormat. This should be less than or equal 
                            to OutputBufferLength. 

  Return Value:

    NT status code.

--*/
{
    PAGED_CODE();

    // This code is the same as AC97 sample intersection handler.
    //

    // Check the size of output buffer. Note that we are returning
    // WAVEFORMATPCMEX.
    //
    if (!OutputBufferLength) 
    {
        *ResultantFormatLength = sizeof(KSDATAFORMAT) + sizeof(WAVEFORMATPCMEX);
        return STATUS_BUFFER_OVERFLOW;
    } 
    
    if (OutputBufferLength < (sizeof(KSDATAFORMAT) + sizeof(WAVEFORMATPCMEX))) 
    {
        return STATUS_BUFFER_TOO_SMALL;
    }

    // Fill in the structure the datarange structure.
    //
    RtlCopyMemory(ResultantFormat, MyDataRange, sizeof(KSDATAFORMAT));

    // Modify the size of the data format structure to fit the WAVEFORMATPCMEX
    // structure.
    //
    ((PKSDATAFORMAT)ResultantFormat)->FormatSize =
        sizeof(KSDATAFORMAT) + sizeof(WAVEFORMATPCMEX);

    // Append the WAVEFORMATPCMEX structure
    //
    PWAVEFORMATPCMEX pWfxExt = 
        (PWAVEFORMATPCMEX)((PKSDATAFORMAT)ResultantFormat + 1);

    pWfxExt->Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
    pWfxExt->Format.nChannels = 
        (WORD)((PKSDATARANGE_AUDIO) ClientDataRange)->MaximumChannels;
    pWfxExt->Format.nSamplesPerSec = 
        ((PKSDATARANGE_AUDIO) ClientDataRange)->MaximumSampleFrequency;
    pWfxExt->Format.wBitsPerSample = (WORD)
        ((PKSDATARANGE_AUDIO) ClientDataRange)->MaximumBitsPerSample;
    pWfxExt->Format.nBlockAlign = 
        (pWfxExt->Format.wBitsPerSample * pWfxExt->Format.nChannels) / 8;
    pWfxExt->Format.nAvgBytesPerSec = 
        pWfxExt->Format.nSamplesPerSec * pWfxExt->Format.nBlockAlign;
    pWfxExt->Format.cbSize = 22;
    pWfxExt->Samples.wValidBitsPerSample = pWfxExt->Format.wBitsPerSample;
    pWfxExt->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;

    // This should be set to wave port's channel config
    // MSVAD ds3dhw implements this properly.
    //
    pWfxExt->dwChannelMask = KSAUDIO_SPEAKER_STEREO;

    // Now overwrite also the sample size in the ksdataformat structure.
    ((PKSDATAFORMAT)ResultantFormat)->SampleSize = pWfxExt->Format.nBlockAlign;
    
    // That we will return.
    //
    *ResultantFormatLength = sizeof(KSDATAFORMAT) + sizeof(WAVEFORMATPCMEX);
    
    return STATUS_SUCCESS;
} // DataRangeIntersection

//=============================================================================
STDMETHODIMP_(NTSTATUS)
CMiniportWaveCyclic::GetDescription
( 
    OUT PPCFILTER_DESCRIPTOR * OutFilterDescriptor 
)
/*++

Routine Description:

  The GetDescription function gets a pointer to a filter description. 
  It provides a location to deposit a pointer in miniport's description 
  structure. This is the placeholder for the FromNode or ToNode fields in 
  connections which describe connections to the filter's pins. 

Arguments:

  OutFilterDescriptor - Pointer to the filter description. 

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    ASSERT(OutFilterDescriptor);

    return 
        CMiniportWaveCyclicMSVAD::GetDescription(OutFilterDescriptor);
} // GetDescription

//=============================================================================
STDMETHODIMP_(NTSTATUS)
CMiniportWaveCyclic::Init
( 
    IN  PUNKNOWN                UnknownAdapter_,
    IN  PRESOURCELIST           ResourceList_,
    IN  PPORTWAVECYCLIC         Port_ 
)
/*++

Routine Description:

  The Init function initializes the miniport. Callers of this function 
  should run at IRQL PASSIVE_LEVEL

Arguments:

  UnknownAdapter - A pointer to the Iuknown interface of the adapter object. 

  ResourceList - Pointer to the resource list to be supplied to the miniport 
                 during initialization. The port driver is free to examine the 
                 contents of the ResourceList. The port driver will not be 
                 modify the ResourceList contents. 

  Port - Pointer to the topology port object that is linked with this miniport. 

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    ASSERT(UnknownAdapter_);
    ASSERT(Port_);

    NTSTATUS                    ntStatus;

    DPF_ENTER(("[CMiniportWaveCyclic::Init]"));

    m_MaxOutputStreams      = MAX_OUTPUT_STREAMS;
    m_MaxInputStreams       = MAX_INPUT_STREAMS;
    m_MaxTotalStreams       = MAX_TOTAL_STREAMS;

    m_MinChannels           = MIN_CHANNELS;
    m_MaxChannelsPcm        = MAX_CHANNELS_PCM;

    m_MinBitsPerSamplePcm   = MIN_BITS_PER_SAMPLE_PCM;
    m_MaxBitsPerSamplePcm   = MAX_BITS_PER_SAMPLE_PCM;
    m_MinSampleRatePcm      = MIN_SAMPLE_RATE;
    m_MaxSampleRatePcm      = MAX_SAMPLE_RATE;
    
    ntStatus =
        CMiniportWaveCyclicMSVAD::Init
        (
            UnknownAdapter_,
            ResourceList_,
            Port_
        );
    if (NT_SUCCESS(ntStatus))
    {
        // Set filter descriptor.
        m_FilterDescriptor = &MiniportFilterDescriptor;

        m_fCaptureAllocated = FALSE;
        m_fRenderAllocated = FALSE;
    }

    return ntStatus;
} // Init

//=============================================================================
STDMETHODIMP_(NTSTATUS)
CMiniportWaveCyclic::NewStream
( 
    OUT PMINIPORTWAVECYCLICSTREAM * OutStream,
    IN  PUNKNOWN                OuterUnknown,
    IN  POOL_TYPE               PoolType,
    IN  ULONG                   Pin,
    IN  BOOLEAN                 Capture,
    IN  PKSDATAFORMAT           DataFormat,
    OUT PDMACHANNEL *           OutDmaChannel,
    OUT PSERVICEGROUP *         OutServiceGroup 
)
/*++

Routine Description:

  The NewStream function creates a new instance of a logical stream 
  associated with a specified physical channel. Callers of NewStream should 
  run at IRQL PASSIVE_LEVEL.

Arguments:

  OutStream -

  OuterUnknown -

  PoolType - 

  Pin - 

  Capture - 

  DataFormat -

  OutDmaChannel -

  OutServiceGroup -

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    ASSERT(OutStream);
    ASSERT(DataFormat);
    ASSERT(OutDmaChannel);
    ASSERT(OutServiceGroup);

    DPF_ENTER(("[CMiniportWaveCyclic::NewStream]"));

    NTSTATUS                    ntStatus = STATUS_SUCCESS;
    PCMiniportWaveCyclicStream  stream = NULL;

    // Check if we have enough streams.
    if (Capture)
    {
        if (m_fCaptureAllocated)
        {
            DPF(D_TERSE, ("[Only one capture stream supported]"));
            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        }
    }
    else
    {
        if (m_fRenderAllocated)
        {
            DPF(D_TERSE, ("[Only one render stream supported]"));
            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        }
    }

    // Determine if the format is valid.
    //
    if (NT_SUCCESS(ntStatus))
    {
        ntStatus = ValidateFormat(DataFormat);
    }

    // Instantiate a stream. Stream must be in
    // NonPagedPool because of file saving.
    //
    if (NT_SUCCESS(ntStatus))
    {
        stream = new (NonPagedPool, MSVAD_POOLTAG) 
            CMiniportWaveCyclicStream(OuterUnknown);

        if (stream)
        {
            stream->AddRef();

            ntStatus = 
                stream->Init
                ( 
                    this,
                    Pin,
                    Capture,
                    DataFormat
                );
        }
        else
        {
            ntStatus = STATUS_INSUFFICIENT_RESOURCES;
        }
    }

    if (NT_SUCCESS(ntStatus))
    {
        if (Capture)
        {
            m_fCaptureAllocated = TRUE;
        }
        else
        {
            m_fRenderAllocated = TRUE;
        }

        *OutStream = PMINIPORTWAVECYCLICSTREAM(stream);
        (*OutStream)->AddRef();
        
        *OutDmaChannel = PDMACHANNEL(stream);
        (*OutDmaChannel)->AddRef();

        *OutServiceGroup = m_ServiceGroup;
        (*OutServiceGroup)->AddRef();

        // The stream, the DMA channel, and the service group have
        // references now for the caller.  The caller expects these
        // references to be there.
    }

    // This is our private reference to the stream.  The caller has
    // its own, so we can release in any case.
    //
    if (stream)
    {
        stream->Release();
    }
    
    return ntStatus;
} // NewStream

//=============================================================================
STDMETHODIMP_(NTSTATUS)
CMiniportWaveCyclic::NonDelegatingQueryInterface
( 
    IN  REFIID  Interface,
    OUT PVOID * Object 
)
/*++

Routine Description:

  QueryInterface

Arguments:

  Interface - GUID

  Object - interface pointer to be returned.

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    ASSERT(Object);

    if (IsEqualGUIDAligned(Interface, IID_IUnknown))
    {
        *Object = PVOID(PUNKNOWN(PMINIPORTWAVECYCLIC(this)));
    }
    else if (IsEqualGUIDAligned(Interface, IID_IMiniport))
    {
        *Object = PVOID(PMINIPORT(this));
    }
    else if (IsEqualGUIDAligned(Interface, IID_IMiniportWaveCyclic))
    {
        *Object = PVOID(PMINIPORTWAVECYCLIC(this));
    }
    else
    {
        *Object = NULL;
    }

    if (*Object)
    {
        // We reference the interface for the caller.

        PUNKNOWN(*Object)->AddRef();
        return STATUS_SUCCESS;
    }

    return STATUS_INVALID_PARAMETER;
} // NonDelegatingQueryInterface

//=============================================================================
NTSTATUS
CMiniportWaveCyclic::ValidateFormat
( 
    IN	PKSDATAFORMAT           pDataFormat 
)
/*++

Routine Description:

  Validates that the given dataformat is valid. This is for supporting 
  WAVEFORMATEXTENSIBLE.

Arguments:

  pDataFormat - The dataformat for validation.

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    ASSERT(pDataFormat);

    DPF_ENTER(("[CMiniportWaveCyclicMSVAD::ValidateFormat]"));

    NTSTATUS                    ntStatus;
    PWAVEFORMATEX               pwfx;

    // Let the default Validator handle the request.
    //
    ntStatus = CMiniportWaveCyclicMSVAD::ValidateFormat(pDataFormat);
    if (NT_SUCCESS(ntStatus))
    {
        return ntStatus;
    }

    // If the format is not known check for WAVEFORMATEXTENSIBLE.
    //
    pwfx = GetWaveFormatEx(pDataFormat);
    if (pwfx)
    {
        if (IS_VALID_WAVEFORMATEX_GUID(&pDataFormat->SubFormat))
        {
            USHORT wfxID = EXTRACT_WAVEFORMATEX_ID(&pDataFormat->SubFormat);

            switch (wfxID)
            {
                // This is for WAVE_FORMAT_EXTENSIBLE support.
                //
                case WAVE_FORMAT_EXTENSIBLE:
                {
                    PWAVEFORMATEXTENSIBLE   pwfxExt = 
                        (PWAVEFORMATEXTENSIBLE) pwfx;

                    ntStatus = ValidateWfxExt(pwfxExt);
                    break;
                }
                

                default:
                    DPF(D_TERSE, ("Invalid format EXTRACT_WAVEFORMATEX_ID!"));
                    break;
            }
        }
        else
        {
            DPF(D_TERSE, ("Invalid pDataFormat->SubFormat!") );
        }
    }

    return ntStatus;
} // ValidateFormat

//=============================================================================
NTSTATUS
CMiniportWaveCyclic::ValidateWfxExt
(
    IN  PWAVEFORMATEXTENSIBLE   pWfxExt
)
/*++

Routine Description:

  Given a waveformatextensible, verifies that the format is in device
  datarange.

Arguments:

  pWfxExt - wave format extensible structure

Return Value:
    
    NT status code.

--*/
{
    PAGED_CODE();

    DPF_ENTER(("[CMiniportWaveCyclic::ValidateWfxExtPcm]"));

    // First verify that the subformat is OK
    //
    if (pWfxExt)
    {
        if(IsEqualGUIDAligned(pWfxExt->SubFormat, KSDATAFORMAT_SUBTYPE_PCM))
        {
            PWAVEFORMATEX           pWfx = (PWAVEFORMATEX) pWfxExt;

            if 
            (
                pWfx->cbSize == 
                sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX)
            )
            {
                // Do any channel specific stuff here.
                //
                
                return CMiniportWaveCyclicMSVAD::ValidatePcm(pWfx);
            }
        }
    }

    DPF(D_TERSE, ("Invalid PCM format"));

    return STATUS_INVALID_PARAMETER;
} // ValidateWfxExtPcm

//=============================================================================
// CMiniportWaveStreamCyclicSimple
//=============================================================================

//=============================================================================
CMiniportWaveCyclicStream::~CMiniportWaveCyclicStream
( 
    void 
)
/*++

Routine Description:

  Destructor for wavecyclicstream 

Arguments:

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    DPF_ENTER(("[CMiniportWaveCyclicStream::~CMiniportWaveCyclicStream]"));

    if (NULL != m_pMiniportLocal)
    {
        if (m_fCapture)
        {
            m_pMiniportLocal->m_fCaptureAllocated = FALSE;
        }
        else
        {
            m_pMiniportLocal->m_fRenderAllocated = FALSE;
        }
    }
} // ~CMiniportWaveCyclicStream

//=============================================================================
NTSTATUS
CMiniportWaveCyclicStream::Init
( 
    IN PCMiniportWaveCyclic         Miniport_,
    IN ULONG                        Pin_,
    IN BOOLEAN                      Capture_,
    IN PKSDATAFORMAT                DataFormat_
)
/*++

Routine Description:

  Initializes the stream object. Allocate a DMA buffer, timer and DPC

Arguments:

  Miniport_ -

  Pin_ -

  Capture_ -

  DataFormat -

  DmaChannel_ -

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    m_pMiniportLocal = Miniport_;

    return 
        CMiniportWaveCyclicStreamMSVAD::Init
        (
            Miniport_,
            Pin_,
            Capture_,
            DataFormat_
        );
} // Init

//=============================================================================
STDMETHODIMP_(NTSTATUS)
CMiniportWaveCyclicStream::NonDelegatingQueryInterface
( 
    IN  REFIID  Interface,
    OUT PVOID * Object 
)
/*++

Routine Description:

  QueryInterface

Arguments:

  Interface - GUID

  Object - interface pointer to be returned

Return Value:

  NT status code.

--*/
{
    PAGED_CODE();

    ASSERT(Object);

    if (IsEqualGUIDAligned(Interface, IID_IUnknown))
    {
        *Object = PVOID(PUNKNOWN(PMINIPORTWAVECYCLICSTREAM(this)));
    }
    else if (IsEqualGUIDAligned(Interface, IID_IMiniportWaveCyclicStream))
    {
        *Object = PVOID(PMINIPORTWAVECYCLICSTREAM(this));
    }
    else if (IsEqualGUIDAligned(Interface, IID_IDmaChannel))
    {
        *Object = PVOID(PDMACHANNEL(this));
    }
    else
    {
        *Object = NULL;
    }

    if (*Object)
    {
        PUNKNOWN(*Object)->AddRef();
        return STATUS_SUCCESS;
    }

    return STATUS_INVALID_PARAMETER;
} // NonDelegatingQueryInterface
#pragma code_seg()