SDI Technologies iH30 Especificações descarregar pdf (Página 13)

Device Setup and Control

Quadro SDI Output PG-03776-001_v06 | 8

4.4 CONFIGURING THE VIDEO DEVICE

After opening a video device, the device must be configured for the desired video

output mode, format, timing, color space, genlock or frame lock characteristics and any

other required video parameters. Code Listing 5 shows a simple example of device

configuration for RGBA 4:4:4:4 input and 1080i YCrCbA 4:2:2:4 video output with

composite tri-level sync.

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Note: On the Quadro SDI products, because both the analog and digital SDI sync

share a common BNC connector, the sync source (analog or SDI) must be specified,

before the incoming signal format can be detected.

Code Listing 5: Configuring a Video Device on Windows

NVVIOCONFIG l_vioConfig;

l_vioConfig.version = NVVIOCONFIG_VER;

l_vioConfig.nvvioConfigType = NVVIOCONFIGTYPE_OUT;

l_vioConfig.fields = NVVIOCONFIG_SIGNALFORMAT |

NVVIOCONFIG_DATAFORMAT |

NVVIOCONFIG_SYNCSOURCEENABLE |

NVVIOCONFIG_COMPOSITESYNCTYPE;

l_vioConfig.vioConfig.outConfig.signalFormat =

NVVIOSIGNALFORMAT_1080I_59_94_SMPTE274;

l_vioConfig.vioConfig.outConfig.dataFormat =

NVVIODATAFORMAT_R8B8B8A8_TO_YCRCBA4224;

l_vioConfig.vioConfig.outConfig.syncEnable = TRUE;

l_vioConfig.vioConfig.outConfig.syncSource =

NVGVOSYNCSOURCE_COMPSYNC;

// Set configuration

l_ret = NvAPI_VIO_SetConfig(m_vioHandle, &l_vioConfig);

if (l_ret != NVAPI_OK) {

return E_FAIL;

}

// Configure external sync parameters

NvU32 l_wait;

NVVIOSTATUS l_vioStatus;

l_vioConfig.fields = 0; // reset fields

// Trigger redetection of sync format

if (NvAPI_VIO_SyncFormatDetect(m_vioHandle, &l_wait)!= NVAPI_OK) {

return E_FAIL;

}

// Wait for sync detection to complete

Sleep(l_wait);

// Get sync signal format

l_vioStatus.version = NVVIOSTATUS_VER;

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