The core API encompasses all VDPAU functionality that operates in the same fashion across all Window Systems. More...
Collaboration diagram for Core API:
Modules | |
| Basic Types | |
VDPAU primarily uses ISO C99 types from stdint.h. | |
| Miscellaneous Types | |
| Error Handling | |
| Versioning | |
| VdpDevice; Primary API object | |
| The VdpDevice is the root of the VDPAU object system. Using a VdpDevice object, all other object types may be created. See the sections describing those other object types for details on object creation. | |
| VdpCSCMatrix; CSC Matrix Manipulation | |
| When converting from YCbCr to RGB data formats, a color space conversion operation must be performed. This operation is parameterized using a "color space conversion matrix". The VdpCSCMatrix is a data structure representing this information. | |
| VdpVideoSurface; Video Surface object | |
| A VdpVideoSurface stores YCbCr data in an internal format, with a variety of possible chroma sub-sampling options. | |
| VdpOutputSurface; Output Surface object | |
| A VdpOutputSurface stores RGBA data in a defined format. | |
| VdpBitmapSurface; Bitmap Surface object | |
| A VdpBitmapSurface stores RGBA data in a defined format. | |
| VdpOutputSurface Rendering Functionality | |
| VdpOutputSurface objects directly provide some rendering/compositing operations. These are described below. | |
| VdpDecoder; Video Decoding object | |
| The VdpDecoder object decodes compressed video data, writing the results to a VdpVideoSurface. | |
| VdpVideoMixer; Video Post-processing and Compositing object | |
| VdpVideoMixer can perform some subset of the following post-processing steps on video: | |
| VdpPresentationQueue; Video presentation (display) object | |
| The VdpPresentationQueue manages a queue of surfaces and associated timestamps. For each surface in the queue, once the associated timestamp is reached, the surface is displayed to the user. This timestamp-based approach yields high quality video delivery. | |
| Display Preemption | |
| The Window System may operate within a frame-work (such as Linux's VT switching) where the display is shared between the Window System (e.g. X) and some other output mechanism (e.g. the VT.) Given this scenario, the Window System's control of the display could be preempted, and restored, at any time. | |
| Entry Point Retrieval | |
| In order to facilitate multiple implementations of VDPAU co-existing within a single process, all functionality is available via function pointers. The mechanism to retrieve those function pointers is described below. | |
Detailed Description
The core API encompasses all VDPAU functionality that operates in the same fashion across all Window Systems.
