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NVIDIA Corporation
68 Quadro FX 4500/5500 SDI User’s Guide– Version 2.0
C
HAPTER 5
API Control
* format exactly match the incoming sync video format.
*
* FRAMELOCK - the GVO output is framelocked to an incoming sync
* signal; framelocking locks at vsync. This requires that the output
* video format have the same refresh rate as the incoming sync video
* format.
*/
#define NV_CTRL_GVO_SYNC_MODE 68 /* RW- */
#define NV_CTRL_GVO_SYNC_MODE_FREE_RUNNING 0
#define NV_CTRL_GVO_SYNC_MODE_GENLOCK 1
#define NV_CTRL_GVO_SYNC_MODE_FRAMELOCK 2
NV_CTRL_GVO_SYNC_SOURCE
/*
* NV_CTRL_GVO_SYNC_SOURCE - if NV_CTRL_GVO_SYNC_MODE is set to either
* GENLOCK or FRAMELOCK, this controls which sync source is used as
* the incoming sync signal (either Composite or SDI). If
* NV_CTRL_GVO_SYNC_MODE is FREE_RUNNING, this attribute has no
* effect.
*/
#define NV_CTRL_GVO_SYNC_SOURCE 69 /* RW- */
#define NV_CTRL_GVO_SYNC_SOURCE_COMPOSITE 0
#define NV_CTRL_GVO_SYNC_SOURCE_SDI 1
NV_CTRL_GVO_OUTPUT_VIDEO_FORMAT
/*
* NV_CTRL_GVO_OUTPUT_VIDEO_FORMAT - specifies the output video
* format. Note that the valid video formats will vary depending on
* the NV_CTRL_GVO_SYNC_MODE and the incoming sync video format. See
* the definition of NV_CTRL_GVO_SYNC_MODE.
*
* Note that when querying the ValidValues for this data type, the
* values are reported as bits within a bitmask
* (ATTRIBUTE_TYPE_INT_BITS); unfortunately, there are more valid
* value bits than will fit in a single 32-bit value. To solve this,
* query the ValidValues for NV_CTRL_GVO_OUTPUT_VIDEO_FORMAT to check