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Video Compositing

Quadro SDI Output PG-03776-001_v06 | 44

l_vioConfig.vioConfig.outConfig.compRange.uMin = crCompRange[2];

l_vioConfig.vioConfig.outConfig.compRange.uMax = crCompRange[3];

if (NvAPI_VIO_SetConfig(m_vioHandle, &l_vioConfig)!= NVAPI_OK) {

return E_FAIL;

}

// Cb composite ranges

l_vioConfig.fields = 0; // reset fields

l_vioConfig.fields = NVVIOCONFIG_COMPOSITE |

NVVIOCONFIG_COMPOSITE_CB;

l_vioConfig.vioConfig.outConfig.enableComposite = TRUE;

l_vioConfig.vioConfig.outConfig.compRange.uEnabled = TRUE;

l_vioConfig.vioConfig.outConfig.compRange.uRange = 0;

l_vioConfig.vioConfig.outConfig.compRange.uMin = cbCompRange[0];

l_vioConfig.vioConfig.outConfig.compRange.uMax = cbCompRange[1];

if (NvAPI_VIO_SetConfig(m_vioHandle, &l_vioConfig)!= NVAPI_OK) {

return E_FAIL;

}

l_vioConfig.vioConfig.outConfig.compRange.uRange = 1;

l_vioConfig.vioConfig.outConfig.compRange.uMin = cbCompRange[2];

l_vioConfig.vioConfig.outConfig.compRange.uMax = cbCompRange[3];

if (NvAPI_VIO_SetConfig(m_vioHandle, &l_vioConfig)!= NVAPI_OK) {

return E_FAIL;

}

When the application enables chroma keying, the Quadro SDI examines the chroma (Cr

and Cb) for each incoming video pixel. If the (Cr, Cb) value for that pixel is within one of

the specified ranges, the color of that pixel is replaced with the pixel color from the GPU.

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SDI Technologies iH30 Dokumentacja Strona 49