Nvidia Quadro FX 4800 - Page 81

NVIDIA Corporation
Quadro FX 4800/5800 and Quadro CX SDI User’s Guide – Version 1.0 77
C
HAPTER 5
API Control
NV_CTRL_GVO_SUPPORTED
/*
* NV_CTRL_GVO_SUPPORTED - returns whether this X screen supports GVO;
* if this screen does not support GVO output, then all other GVO
* attributes are unavailable.
*/
#define NV_CTRL_GVO_SUPPORTED 67 /* R-- */
#define NV_CTRL_GVO_SUPPORTED_FALSE 0
#define NV_CTRL_GVO_SUPPORTED_TRUE 1
NV_CTRL_GVO_SYNC_MODE
/*
* NV_CTRL_GVO_SYNC_MODE - selects the GVO sync mode; possible values
* are:
*
* FREE_RUNNING - GVO does not sync to any external signal
*
* GENLOCK - the GVO output is genlocked to an incoming sync signal;
* genlocking locks at hsync. This requires that the output video
* 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