Inside Macintosh: QuickTime Components
This section describes the request types used by two standard dialog component functions that allow you to work with the current compression settings for an image or a sequence of images. (You can establish these settings in a number of ways; see "Setting Default Parameters" for more information about your options.)
You use the SCGetInfo function to retrieve settings information. The SCSetInfo function (described on SCSetInfo ) enables you to modify the settings.
These functions can work with a number of different types of settings information. When you call either function, you specify the type of data you want to work with. The following request types are defined:
#define scSpatialSettingsType 'sptl' /* spatial options */
#define scTemporalSettingsType 'tprl' /* temporal options */
#define scDataRateSettingsType 'drat' /* data rate */
#define scColorTableType 'clut' /* color table */
#define scProgressProcType 'prog' /* progress function */
#define scExtendedProcsType 'xprc' /* extended dialog */
#define scPreferenceFlagsType 'pref' /* preferences */
#define scSettingsStateType 'ssta' /* all settings */
#define scSequenceIDType 'sequ' /* sequence ID */
#define scWindowPositionType 'wndw' /* window position */
#define scCodecFlagsType 'cflg' /* compression flags */
Each of these request types requires different parameter data. The following sections discuss each of these request types and their data requirements.