NTSTATUS
NTAPI
PinState(
IN PKSPIN Pin,
IN KSSTATE ToState,
IN KSSTATE FromState)
{
PKSFILTER Filter;
/* should the pin stop */
if (ToState == KSSTATE_STOP)
{
/* clear pin context */
RtlZeroMemory(Pin->Context, sizeof(PIN_CONTEXT));
}
/* get parent filter */
Filter = KsPinGetParentFilter(Pin);
/* sanity check */
ASSERT(Filter);
/* attempt processing */
KsFilterAttemptProcessing(Filter, TRUE);
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
AudioPositionPropertyHandler(
IN PIRP Irp,
IN PKSIDENTIFIER Request,
IN OUT PVOID Data)
{
PKSFILTER Filter;
PKSPIN Pin, FirstPin;
PFILE_OBJECT FileObject;
NTSTATUS Status;
ULONG BytesReturned;
/* first get the pin */
Pin = KsGetPinFromIrp(Irp);
/* sanity check */
ASSERT(Pin);
/* get parent filter */
Filter = KsPinGetParentFilter(Pin);
/* acquire filter control mutex */
KsFilterAcquireControl(Filter);
/* get first pin */
FirstPin = KsFilterGetFirstChildPin(Filter, Pin->Id);
/* get connected pin of first pin */
FileObject = KsPinGetConnectedPinFileObject(FirstPin);
if (!FileObject)
{
/* no pin connected */
Status = STATUS_INVALID_PARAMETER;
}
else
{
/* perform request */
Status = KsSynchronousIoControlDevice(FileObject, KernelMode, IOCTL_KS_PROPERTY, (PVOID)Request, sizeof(KSPROPERTY), Data, sizeof(KSAUDIO_POSITION), &BytesReturned);
/* store result size */
Irp->IoStatus.Information = sizeof(KSAUDIO_POSITION);
}
/* release control */
KsFilterReleaseControl(Filter);
/* done */
return Status;
}
NTSTATUS
NTAPI
PinCreate(
IN PKSPIN Pin,
IN PIRP Irp)
{
PKSFILTER Filter;
PKSPIN FirstPin;
PPIN_CONTEXT PinContext;
/* first get the parent filter */
Filter = KsPinGetParentFilter(Pin);
/* now get first child pin */
FirstPin = KsFilterGetFirstChildPin(Filter, Pin->Id);
/* sanity check */
ASSERT(FirstPin);
if (FirstPin != Pin)
{
/* a previous pin already exists */
if (RtlCompareMemory(FirstPin->ConnectionFormat, Pin->ConnectionFormat, Pin->ConnectionFormat->FormatSize) != Pin->ConnectionFormat->FormatSize)
{
/* each instantiated pin must have the same connection format */
return STATUS_INVALID_PARAMETER;
}
}
/* allocate pin context */
PinContext = ExAllocatePool(NonPagedPool, sizeof(PIN_CONTEXT));
if (!PinContext)
return STATUS_INSUFFICIENT_RESOURCES;
/* store pin context */
Pin->Context = PinContext;
/* clear pin context */
RtlZeroMemory(PinContext, sizeof(PIN_CONTEXT));
/* FIXME
* check allocator framing and apply to all pins
*/
return STATUS_SUCCESS;
}
NTSTATUS
CVideoCapturePin::
DispatchCreate(
IN PKSPIN Pin,
IN PIRP Irp
)
{
PAGED_CODE();
DBG_ENTER("(Pin=%d)", Pin->Id);
NTSTATUS Status = STATUS_SUCCESS;
CCaptureFilter* pFilter = reinterpret_cast <CCaptureFilter*>(KsPinGetParentFilter(Pin)->Context);
CVideoCapturePin *CapPin = new (NonPagedPoolNx) CVideoCapturePin (Pin);
if( !CapPin )
{
// Fail if we couldn't create the pin.
Status = STATUS_INSUFFICIENT_RESOURCES;
}
else
{
Status =
CapPin->Initialize();
}
if( NT_SUCCESS (Status) )
{
//
// Adjust the stream header size. The video packets have extended
// header info (KS_FRAME_INFO).
//
pFilter->setPin(CapPin, Pin->Id);
}
else
{
// Clean up.
delete CapPin;
}
DBG_LEAVE("(Pin=%d)=0x%08X", Pin->Id, Status);
return Status;
}
VOID
NTAPI
PinReset(
IN PKSPIN Pin)
{
PKSFILTER Filter;
/* sanity check */
ASSERT(Pin->Context);
/* clear pin context */
RtlZeroMemory(Pin->Context, sizeof(PIN_CONTEXT));
/* get parent filter */
Filter = KsPinGetParentFilter(Pin);
/* sanity check */
ASSERT(Filter);
/* attempt processing */
KsFilterAttemptProcessing(Filter, TRUE);
}
CCapturePin::
CCapturePin (
IN PKSPIN Pin
) :
m_Pin (Pin),
m_State (KSSTATE_STOP)
/*++
Routine Description:
Construct a new capture pin. Find out the filter associated with this
pin and stash a pointer to our parent filter.
Arguments:
Pin -
The AVStream pin object being created.
Return Value:
None
--*/
{
PAGED_CODE();
PKSFILTER ParentFilter = KsPinGetParentFilter (Pin);
m_ParentFilter = reinterpret_cast <CCaptureFilter *> (
ParentFilter -> Context
);
}
