Nv_Ctrl_Gvo Attributes - Nvidia Quadro FX 4500 Software Manual

•
• Setting most GVO attributes only causes the value to be cached in the X server.
The values will be flushed to the hardware either when
NV_CTRL_GVO_DISPLAY_X_SCREEN
the GVO output (with glXBindVideoImageNV()).
• GLX_NV_video_out and
exclusive.
If NV_CTRL_GVO_DISPLAY_X_SCREEN
fail. Similarly, if a GLX client has locked the GVO output (via glXGetVideoDeviceNV),
then
event will be sent when a GLX client locks the GVO output.

NV_CTRL_GVO Attributes

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
#define NV_CTRL_GVO_SUPPORTED_FALSE
#define NV_CTRL_GVO_SUPPORTED_TRUE
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.
NVIDIA Corporation
Quadro FX 4500/5500 SDI User's Guide – Version 2.0
If, rather than using the GLX_NV_video_out extension to display GLX pbuffers on
the GVO output, you wish display the X screen on the GVO output, set
NV_CTRL_GVO_DISPLAY_X_SCREEN
NV_CTRL_GVO_DISPLAY_X_SCREEN_ENABLE.
NV_CTRL_GVO_DISPLAY_X_SCREEN
to
is enabled, or when a GLX pbuffer is bound to
NV_CTRL_GVO_DISPLAY_X_SCREEN
is enabled, then glXGetVideoDeviceNV will
will fail. The
This requires that the output video
C
HAPTER
API Control
are mutually
NV_CTRL_GVO_LOCKED
67 /* R-- */
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