Source Reader Attributes
The following attributes can be used to initialize the Source Reader.
| Attribute | Description |
|---|---|
| MF_LOW_LATENCY | Enables low-latency processing. |
| MF_READWRITE_DISABLE_CONVERTERS | Enables or disables format conversions by the source reader. |
| MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS | Enables the source reader to use hardware-based Media Foundation transforms (MFTs). |
| MF_SOURCE_READER_ASYNC_CALLBACK | Contains a pointer to the application's callback interface for the source reader. |
| MF_SOURCE_READER_D3D_MANAGER | Contains a pointer to the Microsoft Direct3D Device Manager. |
| MF_SOURCE_READER_DISABLE_DXVA | Specifies whether the source reader enables DirectX Video Acceleration (DXVA) on the video decoder. |
| MF_SOURCE_READER_DISCONNECT_MEDIASOURCE_ON_SHUTDOWN | Specifies whether the source reader shuts down the media source. Applies only when the application creates the source reader from an existing media source object. |
| MF_SOURCE_READER_ENABLE_ADVANCED_VIDEO_PROCESSING | Enables advanced video processing by the Source Reader, including color space conversion, deinterlacing, video resizing, and frame-rate conversion. |
| MF_SOURCE_READER_ENABLE_VIDEO_PROCESSING | Enables limited video processing by the source reader. |
| MF_SOURCE_READER_MEDIASOURCE_CONFIG | Contains configuration properties for the media source. |
| MF_SOURCE_READER_PASSTHROUGH_MODE | When this attribute is set, the Source Reader passes through video samples backed by the system memory to internal MFTs without automatically copying them into a DirectX texture, even if a Direct3D device manager is present. |
| MFT_FIELDOFUSE_UNLOCK_Attribute | Contains an IMFFieldOfUseMFTUnlock pointer, which is used to unlock an MFT with field-of-use restrictions. For more information, see Field of Use Restrictions. |
Use these attributes with the following methods and functions:
- IMFReadWriteClassFactory::CreateInstanceFromObject
- IMFReadWriteClassFactory::CreateInstanceFromURL
- MFCreateSourceReaderFromByteStream
- MFCreateSourceReaderFromMediaSource
- MFCreateSourceReaderFromURL
To use any of these attributes, first call MFCreateAttributes to create a new attribute store. Then use the IMFAttributes interface to set the desired attributes on the attribute store. Pass the IMFAttributes pointer to the pAttributes parameter of any of the methods or functions listed previously.
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