IMemInputPin Interface
The IMemInputPin interface provides methods on an input pin to facilitate passing data and flush notifications from a connected output pin of an upstream filter.
When to Implement
Implement this interface on the input pin of every filter. The CBaseInputPin class implements this interface.
When to Use
A connected output pin uses this interface to retrieve an IMemAllocator interface, to pass media samples to the input pin, and to flush pending buffers downstream.
Methods in Vtable Order
IUnknown methods | Description |
---|---|
QueryInterface | Returns pointers to supported interfaces. |
AddRef | Increments the reference count. |
Release | Decrements the reference count. |
IMemInputPin methods | Description |
GetAllocator | Returns the allocator interface that this input pin proposes as the interface for the output pin to use. |
NotifyAllocator | Notifies the input pin as to which allocator the output pin is actually going to use. |
GetAllocatorRequirements | Optional method to use if the filter has specific alignment or prefix requirements but could use an upstream allocator. |
Receive | Receives the next block of data from the stream. |
ReceiveMultiple | Receives the next block of data from the stream. This method behaves similarly to the IMemInputPin::Receive method, but it works with multiple samples. |
ReceiveCanBlock | Determines if sending the IMemInputPin::Receive method might block. |
Last updated on Tuesday, July 13, 2004
© 1992-2000 Microsoft Corporation. All rights reserved.