IAMVideoAccelerator Interface
| Microsoft DirectShow 9.0 |
IAMVideoAccelerator Interface
The IAMVideoAccelerator interface enables a video decoder filter to access DirectX Video Acceleration (DXVA) 1.0 functionality. Applications should not call methods on this interface.
The Video Mixing Renderer filter's input pins support this interface, and so does pin 0 on the Overlay Mixer. If a video decoder filter calls methods on this interface, the decoder should support the IAMVideoAcceleratorNotify interface on its output pin. For more information on how to use this interface, see How Decoders Use IAMVideoAccelerator.
- Note This interface is available in Microsoft® Windows® 2000 and later.
In addition to the methods inherited from IUnknown, the IAMVideoAccelerator interface exposes the following methods.
| Method | Description |
| GetVideoAcceleratorGUIDs | Retrieves a list of the GUIDs for the video accelerator formats accepted. |
| GetUncompFormatsSupported | Retrieves a list of pixel formats that can be used to render a specified video accelerator format. |
| GetInternalMemInfo | Retrieves information about the uncompressed data memory requirements, based on the video accelerator GUID, the uncompressed size, and the pixel format. |
| GetCompBufferInfo | Retrieves compressed buffer information. |
| GetInternalCompBufferInfo | Called after the pins are connected, retrieving compressed buffer information given the connected type. |
| BeginFrame | Begins frame processing. |
| EndFrame | Ends frame processing and passes miscellaneous data to the video accelerator driver. |
| GetBuffer | Retrieves the compressed buffer of a specified index and type. |
| ReleaseBuffer | Releases a compressed buffer after processing. |
| Execute | Performs a decompression operation. |
| QueryRenderStatus | Queries the processing status of a data buffer. |
| DisplayFrame | Displays a decoded frame. |
Requirements
Header: Include videoacc.h.
Library: Use Strmiids.lib.