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| typedef VdpStatus | VdpDeviceCreateX11(Display *display, int screen, VdpDevice *device, VdpGetProcAddress **get_proc_address) |
| Create a VdpDevice object for use with X11. More... | |
| typedef VdpStatus | VdpPresentationQueueTargetCreateX11(VdpDevice device, Drawable drawable, VdpPresentationQueueTarget *target) |
| Create a VdpPresentationQueueTarget for use with X11. More... | |
| VdpDeviceCreateX11 | vdp_device_create_x11 |
| Create a VdpDevice object for use with X11. This is an actual symbol of type VdpDeviceCreateX11. More... | |
| #define | VDP_FUNC_ID_PRESENTATION_QUEUE_TARGET_CREATE_X11 |
Detailed Description
The set of VDPAU functionality specific to usage with the X Window System.
Library Layout
An X11-oriented VDPAU installation consists of the following components:
- Header files. These files are located in the standard system header file path.
- The VDPAU wrapper library. These files are located in the standard system (possibly X11-specific) library path.
libvdpau.so.1(runtime)libvdpau.so(development)
- Back-end driver files. These files are located in a system-defined library path, which is configurable at compile time but is typically /usr/lib/vdpau. Use
pkg-config --variable=moduledir vdpauto locate the driver install path.$moduledir/libvdpau_%s.so.1For example:/usr/lib/vdpau/libvdpau_nvidia.so.1/usr/lib/vdpau/libvdpau_intel.so.1/usr/lib/vdpau/libvdpau_ati.so.1 The library path can be overridden by the VDPAU_DRIVER_PATH environment variable.
The VDPAU wrapper library implements just one function; vdp_device_create_x11. The wrapper implements this function by dynamically loading the appropriate back-end driver file mentioned above. When available, the wrapper uses the DRI2 extension's DRI2Connect request with the driver type 'DRI2DriverVDPAU' to determine which back-end driver to load. If that fails, the wrapper library hard-codes the driver name as "nvidia", although this can be overridden using the environment variable VDPAU_DRIVER.
The back-end driver is expected to implement a function named vdp_imp_device_create_x11. The wrapper will call this function to actually implement the vdp_device_create_x11 application call.
Note that it is theoretically possible for an application to create multiple VdpDevice objects. In this case, the wrapper library may load multiple back-end drivers into the same application, and/or invoke a specific back-end driver's VdpImpDeviceCreateX11 multiple times. The wrapper library imposes no policy regarding whether the application may instantiate multiple VdpDevice objects for the same display and/or screen. However, back-end drivers are free to limit the number of VdpDevice objects as required by their implementation.
Macro Definition Documentation
| #define VDP_FUNC_ID_PRESENTATION_QUEUE_TARGET_CREATE_X11 |
Typedef Documentation
| typedef VdpStatus VdpDeviceCreateX11(Display *display, int screen,VdpDevice *device, VdpGetProcAddress **get_proc_address) |
Create a VdpDevice object for use with X11.
- Parameters
-
[in] display The X Display that the VdpDevice VdpDevice will operate against. [in] screen The X screen that the VdpDevice will operate against. [out] device The new device's handle. [out] get_proc_address The get_proc_address entry point to use with this device.
- Returns
- VdpStatus The completion status of the operation.
| typedef VdpStatus VdpPresentationQueueTargetCreateX11(VdpDevice device, Drawable drawable,VdpPresentationQueueTarget *target) |
Create a VdpPresentationQueueTarget for use with X11.
- Parameters
-
[in] device The device that will contain the queue target. [in] drawable The X11 Drawable that the presentation queue will present into. [out] target The new queue target's handle.
- Returns
- VdpStatus The completion status of the operation.
Note: VDPAU expects to own the entire drawable for the duration of time that the presentation queue target exists. In particular, implementations may choose to manipulate client-visible X11 window state as required. As such, it is recommended that applications create a dedicated window for the presentation queue target, as a child (grand-child, ...) of their top-level application window.
Applications may also create child-windows of the presentation queue target, which will cover any presented video in the normal fashion. VDPAU implementations will not manipulate such child windows in any fashion.
Variable Documentation
| VdpDeviceCreateX11 vdp_device_create_x11 |
Create a VdpDevice object for use with X11. This is an actual symbol of type VdpDeviceCreateX11.
