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Advanced Topics

Quadro SDI Output PG-03776-001_v06 | 71

disableSyncTermination(GLvoid)

{

NVVIOCONFIG l_vioConfig;

memset(&l_vioConfig, 0, sizeof(l_vioConfig));

l_vioConfig.version = NVVIOCONFIG_VER;

l_vioConfig.fields = 0;

l_vioConfig.fields = NVVIOCONFIG_COMPOSITETERMINATE;

l_vioConfig.vioConfig.outConfig.compositeTerminate = FALSE;

// Set configuration

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

return E_FAIL;

}

return S_OK;

}

10.9 SPECIFYING THE INTERNAL BUFFER QUEUE

LENGTH

The driver software for the Quadro SDI maintains a collection of internal buffers. The

default number of buffers is five. This internal buffer queue permits applications that do

not set the bBlock argument to

TRUE in wglSendPbufferToVideoNV() or

glXSendPbufferToVideoNV() to render and send frames or fields ahead of when they

will be scanned out by the SDI video device. On Windows XP, the number of internal

buffers can be queried using

NvAPI_VIO_GetConfig() as outlined in Code Listing 51.

Code Listing 51: Querying the Number of Internal Buffers on

Windows

// Get flip queue length

HRESULT

getFlipQueueLength()

{

NVVIOCONFIG l_vioConfig;

memset(&l_vioConfig, 0, sizeof(l_vioConfig));

l_vioConfig.version = NVVIOCONFIG_VER;

l_vioConfig.fields = 0;

l_vioConfig.fields = NVVIOCONFIG_FLIPQUEUELENGTH;

// Get configuration

if (NvAPI_VIO_GetConfig(hVIO, &l_vioConfig)!= NVAPI_OK) {

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