IDirectDrawMediaSampleAllocator interface (amstream.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The IDirectDrawMediaSampleAllocator interface allocates samples that contain DirectDraw surfaces.
The Overlay Mixer filter's input pin creates an allocator that implements this interface. This allocator allocates IDirectDrawMediaSample media samples that also support the IMediaSample interface.
Decoder filters should not have to use this interface to connect to the Overlay Mixer. Applications never use this interface.
Inheritance
The IDirectDrawMediaSampleAllocator interface inherits from the IUnknown interface. IDirectDrawMediaSampleAllocator also has these types of members:
Methods
The IDirectDrawMediaSampleAllocator interface has these methods.
| IDirectDrawMediaSampleAllocator::GetDirectDraw The GetDirectDraw method retrieves a pointer to the DirectDraw instance used to allocate surfaces. |
Requirements
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | amstream.h |