Programming With QuickTime VR

Sample Atom Container for the QTVR Flattener

The sample code in Listing 5-4 creates an atom container and adds atoms to indicate an import preview file for the flattener to use.

Listing 4 Specifying a preview file for the flattener to use



 
Boolean yes = true;

QTAtomContainer exportData;

QTAtom parent;

err = QTNewAtomContainer(&exportData);

// create a parent for the other settings atoms

err = QTInsertChild (exportData, kParentAtomIsContainer,

            QTVRFlattenerParentAtomType, 1, 0, 0, nil, &parent);

// Add child atom to indicate we want to import the preview from a file

err = QTInsertChild (exportData, parent, QTVRImportPreviewAtomType, 1, 0, 

            sizeof (yes), &yes, nil);

// Add child atom to tell which file to import

err = QTInsertChild (exportData, parent, QTVRImportSpecAtomType, 1, 0,

            sizeof (previewSpec), &previewSpec, nil);

// Tell the export component

MovieExportSetSettingsFromAtomContainer (qtvrExport, exportData);

Overriding the compression settings is a bit more complicated. You need to open a standard image compression dialog component and make calls to obtain an atom container that you can then pass to the QTVR Flattener component.

Listing 5 Overriding the compression settings



 
ComponentInstance sc;

QTAtomContainer compressorData;

SCSpatialSettings ss;

sc = OpenDefaultComponent(StandardCompressionType,StandardCompressionSubType);

ss.codecType = kCinepakCodecType;

ss.codec = nil;

ss.depth = 0;

ss.spatialQuality = codecHighQuality

err = SCSetInfo(sc, scSpatialSettingsType, &ss);

err = SCGetSettingsAsAtomContainer(sc, &compressorData);

MovieExportSetSettingsFromAtomContainer (qtvrExport, compressorData);