QuickTime 3 Reference
Listing 1 shows how to assemble a list of available video output components using the FindNextComponent function. This list can then be presented to the user.
The base video output component is a special component that provides services to other video output components. It is never connected to a display, and it has a component flag, kQTVideoOutputDontDisplayToUser, that indicates that it should not be included in a list of available video output components. The sample code shows how to check for this flag.
Listing 1 Displaying available video output components
ComponentDescription cd;
Component c = 0;
cd.componentType = QTVideoOutputComponentType;
cd.componentSubType = 0;
cd.componentManufacturer = 0;
cd.componentFlags = 0;
cd.componentFlagsMask = kQTVideoOutputDontDisplayToUser;
while (c = FindNextComponent (c, &cd)) {
Handle nameHandle = NewHandle (0);
GetComponentInfo (c, &cd, nameHandle, nil, nil);
// add name to list
DisposeHandle (nameHandle);
}