ISO/IEC INTERNATIONAL STANDARD 14478-2 First edition 1998-12-15 Information technology - Computer graphics and image processing Presentation Environment for Multimedia Objects (PREMO) - Part 2: Foundation Component Technologies de I'information - Infographie et traitement d'images Environnement deprésentation d'objets multimedia (PREMO)- Partie2:Composantfondamental IEC Tso Reference number ISO/IEC 14478-2:1998(E) ISO/IEC 14478-2:1998(E) Contents Foreword. Introduction Scope. 2 Normative references.. 3 3.1 PREMO Part 1 definitions 3.2 Additional definitions 4 Symbols and abbreviations . 5 Conformance 6 Foundation non-object types. 7 Foundation object types 7.1 Introduction. 7.2 PREMO objects and fundamental object behaviour 7.2.1 Creation and destruction of objects. 7.2.2 Inquiries on types . 7.3 Simple PREMO objects 7.3.1 Structures. 7.4 Callback objects . 7.5 Enhanced PREMO Objects 7.5.1 Object properties. @ISO/IEC1998 Al rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. ISO/IEC Copyright Office · Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland ii ISO/IEC 14478-2:1998(E) ISO/IEC 7.6 Controller objects . 8 7.7 Event handler objects 7.7.1 Basic Event Handler objects. 10 7.7.2 Synchronization Points 11 7.8 Time objects 7.8.1 Clock object 12 7.8.2 System clock object 12 7.8.3 Timer object 12 7.9 Synchronization. 12 7.9.1 Event Synchronizabie objects 12 7.9.2 Time synchronizable objects 16 7.9.3 Time slave objects 17 7.9.4 Time line objects 18 8 Enhanced property management and factories. 8.1 Enhanced Propertymanagement. 19 8.1.1 Motivation. 19 8.1.2 Capabilities and native property values: the Properry/nquiry type 20 8.1.3 Property constraint and selection: the PropertyConstraint type 21 8.2 Creating PREMO objects 25 8.2.1 GenericFactoryobjects 25 Functional specification. 27 9.1 Introduction. 27 9.2 Common non-object data types 27 9.3 Exceptions. 29 9.4 PREMOObject and fundamental object behaviour 30 9.5 Simple PREMO object and structures. 9.5.1 SimplePREMOObjec!. 3/ 9.5.2 Event structure 31 9.5.3 Constraint structure 31 9.5.4 Action Element 32 9.5.5 Synchronization Element 9.6 Callback objects 33 9.7 Enhanced PREMO object 34 9.8 Controller object . 37 9.9 EventHandler objects 40 9.9.1 Basic event handler objects 40 9.9.2 SynchronizationPoint object 41 9.9.3 ANDSvnchronizationPointobject 43 9.10 Timing objects. . . 45 9.10.1 Clock object 45 9.10.2 SysClock object. 45 9.10.3 Timer object 46 9.11 Synchronization objects 47 9.11.13 Synchronizable object.. 47 9.11.2 TineSynchronizable object 53 9.11.3 TimeLine object. 57 9.11.4 TimeSlave ohject. 58 9.12 Enhanced Property management. 59 9.12.1 Propertylnquiny object 59 9.12.2 PropertyConsiraint object 60 9.13 Creating PREMO objects 63 9.13.1 GenericFactory object 9.13.2 FactonFinder object 64 10 Component specification . 65 A Overview of PREMO Foundation Object Types. 66 iii