CBaseInputPin Class

Microsoft DirectShow 9.0

CBaseInputPin Class

The CBaseInputPin class is an abstract base class for implementing input pins. This class adds support for the IMemInputPin interface, in addition to the IPin interface support provided by CBasePin.

To use this class, derive a new class and override at least the following methods:

• CBaseInputPin::BeginFlush
• CBaseInputPin::EndFlush
• CBaseInputPin::Receive
• CBasePin::CheckMediaType
• CBasePin::GetMediaType

Depending on the function of the pin, you might need to override additional methods in CBaseInputPin or CBasePin.

Requirements

Header: Declared in Amfilter.h; include Streams.h.

Library: Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

Protected Member Variables
m_pAllocator	Pointer to the memory allocator.
m_bReadOnly	Flag that indicates whether the allocator produces read-only media samples.
m_bFlushing	Flag that indicates whether the pin is currently flushing.
m_SampleProps	Properties of the most recent sample.
Public Methods
CBaseInputPin	Constructor method.
~CBaseInputPin	Destructor method.
BreakConnect	Releases the pin from a connection.
IsReadOnly	Queries whether the allocator uses read-only media samples.
IsFlushing	Queries whether the filter is currently flushing.
CheckStreaming	Determines whether the pin can accept samples. Virtual.
PassNotify	Passes a quality-control message to the appropriate object.
Inactive	Notifies the pin that the filter is no longer active. Virtual.
SampleProps	Retrieves the properties of the most recent sample.
IPin Methods
BeginFlush	Begins a flush operation.
EndFlush	Ends a flush operation.
IMemInputPin Methods
GetAllocator	Retrieves the memory allocator proposed by this pin.
NotifyAllocator	Specifies an allocator for the connection.
GetAllocatorRequirements	Retrieves the allocator properties requested by the input pin.
Receive	Receives the next media sample in the stream.
ReceiveMultiple	Receives multiple samples in the stream.
ReceiveCanBlock	Determines whether calls to the CBaseInputPin::Receive method might block.
IQualityControl Methods
Notify	Receives a quality-control message.