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Ancillary Data

Quadro SDI Output PG-03776-001_v06 | 31

6.2 BASICS

Ancillary data is sent do the Quadro SDI device per frame by filling in the

corresponding fields in the following structure and setting the fields mask to indicate

those fields with valid data to be sent.

// Per Frame

typedef struct tagNVVIOANCDATAFRAME {

NvU32 version; // Structure version

NvU32 fields; // Field mask

NVVIOANCAUDIOGROUP AudioGroup1; // Audio group 1

NVVIOANCAUDIOGROUP AudioGroup2; // Audio group 2

NVVIOANCAUDIOGROUP AudioGroup3; // Audio group 3

NVVIOANCAUDIOGROUP AudioGroup4; // Audio group 4

NvU32 LTCTimecode; // RP188

NvU32 LTCUserBytes;

NvU32 VITCTimecode;

NvU32 VITCUserBytes;

NvU32 FilmTimecode;

NvU32 FilmUserBytes;

NvU32 ProductionTimecode; // RP201

NvU32 ProductionUserBytes; // RP201

NvU32 FrameID;

NvU32 numCustomPackets;

NVVIOANCDATAPACKET *CustomPackets;

} NVVIOANCDATAFRAME;

Once the ancillary data for a frame has been placed into the structure it is sent to the SDI

device with the

NvVIOANCAPI_SendANCData() function as shown in the Code Listing 30.

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Note: As of Release 3.2 of the NVIDIA Quadro SDI SDK, only VITC and custom data

packets are supported by the ancillary data API.

Code Listing 30: Sending Ancillary Data to the SDI Device

// Send ANC data

NvVIOANCAPI_SendANCData(NULL, &ancData);

This call should be made by an application prior to call glPresentFrameKeyed() or

glPresentFrameDualFill().

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