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/**************************************************************************
A/V Stream Camera Sample
Copyright (c) 2001, Microsoft Corporation.
File:
imagecapture.cpp
Abstract:
An implementation of CImageCapturePin
History:
created 3/8/2001
**************************************************************************/
#include "Common.h"
#ifdef ALLOC_PRAGMA
#pragma code_seg("PAGE")
#endif // ALLOC_PRAGMA
CImageCapturePin::
CImageCapturePin(
_In_ PKSPIN Pin
) : CCapturePin (Pin)
{
PAGED_CODE();
}
NTSTATUS
CImageCapturePin::
DispatchCreate(
_In_ PKSPIN Pin,
_In_ PIRP Irp
)
/*++
Routine Description:
Static member function called when a pin is created. Instantiate a
CImageCapturePin and attach it to our filter object.
Arguments:
Pin -
The KSPIN to wrap.
Irp -
The IRP assocated with this request.
Return Value:
Success / Failure
--*/
{
PAGED_CODE();
DBG_ENTER("(Pin=%d)", Pin->Id);
NTSTATUS Status = STATUS_SUCCESS;
CCaptureFilter* pFilter = reinterpret_cast <CCaptureFilter*>(KsPinGetParentFilter(Pin)->Context);
CImageCapturePin *CapPin = new (NonPagedPoolNx) CImageCapturePin (Pin);
if( !CapPin )
{
// Fail if we couldn't create the pin.
Status = STATUS_INSUFFICIENT_RESOURCES;
}
else
{
// Query the filter for the PhotoMode so we can figure out how many frames should be allocated.
CExtendedPhotoMode Mode;
Mode.PinId = Pin->Id; // Use Pin ID from KS.
Status = pFilter->GetPhotoMode( &Mode );
// CSensor::GetPhotoMode could fail if the framework gives us a Pin ID that doesn't match our descriptors...
if( NT_SUCCESS(Status) )
{
// Override the number of frames.
CapPin->SetDesiredFrames(
( (Mode.Flags & KSCAMERA_EXTENDEDPROP_PHOTOMODE_SEQUENCE) ?
Mode.RequestedHistoryFrames() : 1)
+ IMAGE_CAPTURE_PIN_MINIMUM_FRAMES );
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;
}
NTSTATUS
CImageCapturePin::
Close(
_In_ PIRP Irp
)
{
PAGED_CODE();
// Reset the image sim's counts and queues.
Reset();
// Call the base Close operation.
return CCapturePin::Close(Irp);
}
// ImageCapturePinDispatch:
//
// This is the dispatch table for the capture pin. It provides notifications
// about creation, closure, processing, data formats, etc...
// just a copy of CapturePinDispatch for now.
//
DEFINE_CAMERA_KSPIN_DISPATCH( ImageCapturePinDispatch, CImageCapturePin );
//
// ImagePinAllocatorFraming:
//
// This is the simple framing structure for the capture pin. Note that this
// will be modified via KsEdit when the actual capture format is determined.
// just a copy of CapturePinAllocatorFraming for now.
//
DECLARE_SIMPLE_FRAMING_EX (
ImageCapturePinAllocatorFraming,
STATICGUIDOF (KSMEMORY_TYPE_KERNEL_NONPAGED),
KSALLOCATOR_REQUIREMENTF_SYSTEM_MEMORY |
KSALLOCATOR_REQUIREMENTF_PREFERENCES_ONLY,
4,
0,
2 * PAGE_SIZE,
2 * PAGE_SIZE
);
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