SDI Technologies iH30 Spezifikationen PDF herunterladen (Seite 132)

NV Control VIO Controls

Quadro SDI Output PG-03776-001_v06 | 127

* supported number of (logical) channels within a single physical jack

* a GVI device. For most SDI video formats, there is only one channel

* (channel 0). But for 3G video formats (as specified in SMPTE 425),

* as an example, there are two channels (channel 0 and channel 1) per

* physical jack.

#define NV_CTRL_GVI_MAX_CHANNELS_PER_JACK 336 /*

R--I */

* NV_CTRL_GVI_MAX_STREAMS - Returns the maximum number of streams

* that can be configured on the GVI device.

#define NV_CTRL_GVI_MAX_STREAMS 337 /*

R--I */

* NV_CTRL_GVI_NUM_CAPTURE_SURFACES - The GVI interface exposed through

* NV-CONTROL and the GLX_NV_video_input extension uses internal

capture

* surfaces when frames are read from the GVI device. The

* NV_CTRL_GVI_NUM_CAPTURE_SURFACES can be used to query and assign the

* number of capture surfaces. This attribute is applied when

* glXBindVideoCaptureDeviceNV() is called by the application.

* A lower number of capture surfaces will mean less video memory is

used,

* but can result in frames being dropped if the application cannot

keep up

* with the capture device. A higher number will prevent frames from

being

* dropped, making capture more reliable but will consume move video

memory.

#define NV_CTRL_GVI_NUM_CAPTURE_SURFACES 338 /*

RW-I */

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

****/

* String Attributes:

* String attributes can be queryied through the

XNVCTRLQueryStringAttribute()

* and XNVCTRLQueryTargetStringAttribute() function calls.

* String attributes can be set through the XNVCTRLSetStringAttribute()

* function call. (There are currently no string attributes that can

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SDI Technologies iH30 Spezifikationen Seite 132