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/**************************************************************************
A/V Stream Camera Sample
Copyright (c) 2001, Microsoft Corporation.
File:
videocapture.cpp
Abstract:
Video Capture Pin implementation.
Handles construction and defines pin data ranges.
History:
created 3/8/2001
**************************************************************************/
#include "Common.h"
#include "ntintsafe.h"
#ifdef ALLOC_PRAGMA
#pragma code_seg("PAGE")
#endif // ALLOC_PRAGMA
CVideoCapturePin::CVideoCapturePin(IN PKSPIN Pin) :
CCapturePin (Pin)
{
PAGED_CODE();
}
/*************************************************
Routine Description:
Create a new capture pin. This is the creation dispatch for
the video capture pin.
Arguments:
Pin -
The pin being created
Irp -
The creation Irp
Return Value:
Success / Failure
**************************************************/
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;
}
//
// CapturePinDispatch:
//
// This is the dispatch table for the capture pin. It provides notifications
// about creation, closure, processing, data formats, etc...
//
DEFINE_CAMERA_KSPIN_DISPATCH( VideoCapturePinDispatch, CVideoCapturePin );
//
// CapturePinAllocatorFraming:
//
// 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.
//
DECLARE_SIMPLE_FRAMING_EX(
VideoCapturePinAllocatorFraming,
STATICGUIDOF( KSMEMORY_TYPE_KERNEL_NONPAGED ),
KSALLOCATOR_REQUIREMENTF_SYSTEM_MEMORY |
KSALLOCATOR_REQUIREMENTF_PREFERENCES_ONLY,
2,
0,
2 * PAGE_SIZE,
2 * PAGE_SIZE
);
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