wavepcistream.cpp File Reference

#include "wavepciminiport.h"
#include "wavepcistream.h"

Include dependency graph for wavepcistream.cpp:

Go to the source code of this file.

Macros
#define	STR_MODULENAME   "AC97 Stream: "

Functions
	IMP_CMiniportStream_SetFormat (CMiniportWaveICHStream)
	IMP_CMiniportStream_QueryInterface (CMiniportWaveICHStream, IMiniportWavePciStream)
NTSTATUS	CreateMiniportWaveICHStream (OUT CMiniportWaveICHStream **MiniportPCIStream, IN PUNKNOWN pUnknownOuter, _When_((PoolType &NonPagedPoolMustSucceed) !=0, __drv_reportError("Must succeed pool allocations are forbidden. " "Allocation failures cause a system crash")) IN POOL_TYPE PoolType)
	STDMETHODIMP_ (NTSTATUS) CMiniportWaveICHStream
	STDMETHODIMP_ (void) CMiniportWaveICHStream

Macro Definition Documentation

STR_MODULENAME

#define STR_MODULENAME   "AC97 Stream: "

Definition at line 11 of file wavepcistream.cpp.

Function Documentation

CreateMiniportWaveICHStream()

NTSTATUS CreateMiniportWaveICHStream	(	OUT CMiniportWaveICHStream **	MiniportPCIStream,
		IN PUNKNOWN	pUnknownOuter,
		_When_((PoolType &NonPagedPoolMustSucceed) !=0, __drv_reportError("Must succeed pool allocations are forbidden. " "Allocation failures cause a system crash")) IN POOL_TYPE	PoolType
	)

Definition at line 38 of file wavepcistream.cpp.

{
    PAGED_CODE ();
 
    DOUT (DBG_PRINT, ("[CreateMiniportWaveICHStream]"));
 
    //
    // This is basically like the macro at stdunk with the change that we
    // don't cast to interface unknown but to interface MiniportIchStream.
    //
    *MiniportPCIStream = new (PoolType, PoolTag)
                        CMiniportWaveICHStream (pUnknownOuter);
    if (*MiniportPCIStream)
    {
        (*MiniportPCIStream)->AddRef ();
        return STATUS_SUCCESS;
    }
 
    return STATUS_INSUFFICIENT_RESOURCES;
}

IMP_CMiniportStream_QueryInterface()

IMP_CMiniportStream_QueryInterface	(	CMiniportWaveICHStream	,
		IMiniportWavePciStream
	)

IMP_CMiniportStream_SetFormat()

IMP_CMiniportStream_SetFormat

(

CMiniportWaveICHStream

)

STDMETHODIMP_() [1/2]

STDMETHODIMP_

(

NTSTATUS

)

Definition at line 148 of file wavepcistream.cpp.

{
    PAGED_CODE ();
 
    ULONG SampleSize;
 
    DOUT (DBG_PRINT, ("[CMiniportWaveICHStream::GetAllocatorFraming]"));
 
    //
    // Determine sample size in bytes.  Always number of
    // channels * 2 (because 16-bit).
    //
    SampleSize = DataFormat->WaveFormatEx.nChannels * 2;
 
    //
    // Report the suggested requirements.
    //
    AllocatorFraming->RequirementsFlags =
        KSALLOCATOR_REQUIREMENTF_SYSTEM_MEMORY |
        KSALLOCATOR_REQUIREMENTF_PREFERENCES_ONLY;
    AllocatorFraming->Frames = 8;
 
    //
    // Currently, arbitrarily selecting 10ms as the frame target size.
    //
    //  This value needs to be sample block aligned for AC97 to work correctly.
    //  Assumes 100Hz minimum sample rate (otherwise FrameSize is 0 bytes)
    //
    AllocatorFraming->FrameSize = SampleSize * (DataFormat->WaveFormatEx.nSamplesPerSec / 100);
    AllocatorFraming->FileAlignment = FILE_LONG_ALIGNMENT;
    AllocatorFraming->PoolType = NonPagedPool;
 
    return STATUS_SUCCESS;
}

STDMETHODIMP_() [2/2]

STDMETHODIMP_

(

void

)

Definition at line 331 of file wavepcistream.cpp.

{
 
    DOUT (DBG_PRINT, ("Service"));
 
    // release all mappings
    ReleaseUsedMappings ();
 
    // get new mappings
    GetNewMappings ();
}