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Ancillary Data

Quadro SDI Output PG-03776-001_v06 | 32

6.3 TIME CODE

The following code example shows how an application can send VITC time code as

defined by SMPTE 12M-1999 to the SDI device. The time code data as well as relevant

bit flags are packed into the 32-bit

VITCTimecode field as documented and

demonstrated in the following code example.

Code Listing 31: Specifying Time Code Data

NVVIOANCDATAFRAME ancData = {0};

static int counter = 0;

// Set field mask

ancData.version = NVVIOANCDATAFRAME_VERSION;

ancData.fields = NVVIOANCDATAFRAME_VITC;

// Generate timecode here

int frameTens = myTimeCode.frame() / 10;

int frameUnits = myTimeCode.frame() % 10;

int secondTens = myTimeCode.second() / 10;

int secondUnits = myTimeCode.second() % 10;

int minuteTens = myTimeCode.minute() / 10;

int minuteUnits = myTimeCode.minute() % 10;

int hourTens = myTimeCode.hour() / 10;

int hourUnits = myTimeCode.hour() % 10;

// Set relevant bits here

short dropFrame = 1;

short colorFrame = 1;

short fieldPhase = 0;

short /jointfilesconvert/300731/bg0 = 1;

short /jointfilesconvert/300731/bg1 = 0;

short /jointfilesconvert/300731/bg2 = 1;

// Per SMPTE 12M-1999, shift values to the appropriate

// bit positions.

// Bit Assigment 60-field TV 50-field TV 24-frame Film

// --- ---------------- ----------- ----------- -------------

// 0 Frame Units (1)

// 1 Frame Units (2)

// 2 Frame Units (4)

// 3 Frame Units (8)

// 4 Frame Tens (1)

// 5 Frame Tens (2)

// 6 Flag Drop Frame Unused Unused

// 7 Flag Color Frame Color Frame Unused

// 8 Second Units (1)

// 9 Second Units (2)

// 10 Second Units (4)

// 11 Second Units (8)

1 2 ... 32 33 34 35 36 37 38 39 40 41 42 ... 146 147

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