SDI Technologies iH30 Spezifikationen PDF herunterladen (Seite 112)

NV Control VIO Controls

Quadro SDI Output PG-03776-001_v06 | 107

* Integer attributes can be queried through the

XNVCTRLQueryAttribute() and

* XNVCTRLQueryTargetAttribute() function calls.

* Integer attributes can be set through the XNVCTRLSetAttribute() and

* XNVCTRLSetTargetAttribute() function calls.

* Unless otherwise noted, all integer attributes can be queried/set

* using an NV_CTRL_TARGET_TYPE_X_SCREEN target. Attributes that

cannot

* take an NV_CTRL_TARGET_TYPE_X_SCREEN also cannot be queried/set

through

* XNVCTRLQueryAttribute()/XNVCTRLSetAttribute() (Since these assume

* an X Screen target).

/**********************************************************************

****/

* The NV_CTRL_GVO_* integer attributes are used to configure GVO

* (Graphics to Video Out). This functionality is available, for

* example, on the Quadro FX 4000 SDI graphics board.

* The following is a typical usage pattern for the GVO attributes:

* - query NV_CTRL_GVO_SUPPORTED to determine if the X screen supports

GV0.

* - specify NV_CTRL_GVO_SYNC_MODE (one of FREE_RUNNING, GENLOCK, or

* FRAMELOCK); if you specify GENLOCK or FRAMELOCK, you should also

* specify NV_CTRL_GVO_SYNC_SOURCE.

* - Use NV_CTRL_GVO_COMPOSITE_SYNC_INPUT_DETECTED and

* NV_CTRL_GVO_SDI_SYNC_INPUT_DETECTED to detect what input syncs are

* present.

* (If no analog sync is detected but it is known that a valid

* bi-level or tri-level sync is connected set

* NV_CTRL_GVO_COMPOSITE_SYNC_INPUT_DETECT_MODE appropriately and

* retest with NV_CTRL_GVO_COMPOSITE_SYNC_INPUT_DETECTED).

* - if syncing to input sync, query the

* NV_CTRL_GVIO_DETECTED_VIDEO_FORMAT attribute; note that Input video

* format can only be queried after SYNC_SOURCE is specified.

* - specify the NV_CTRL_GVIO_REQUESTED_VIDEO_FORMAT

* - specify the NV_CTRL_GVO_DATA_FORMAT

* - specify any custom Color Space Conversion (CSC) matrix, offset,

* and scale with XNVCTRLSetGvoColorConversion().

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SDI Technologies iH30 Spezifikationen Seite 112