CAN CSA-ISO IEC 13522-3-2000 Information technology - Coding of multimedia and hypermedia information - Part 3 MHEG script interchange representation.pdf

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1、CSA INTERNATIONAL National Standard of Canada CAN/CSA-ISO/ZEC 13522-3-00 (ISO/IEC 13522-31997) International Standard ISO/IEC 13522-3:1997 (first edition 1997-05-15) has been adopted without modification as CSA Standard CAN/CSA-ISO/IEC 13522-3-00, which has been approved as a National Standard of Ca

2、nada by the Standards Council of Canada. ISBN 1-55324-040-5 February 2000 Information technology - Coding of multimedia and hypermedia information - Part 3: MHEG script interchange representation Technologies de linformation - Codage de linformation multimedia et hypermedia - Partie 3: Representatio

3、n dhterechange script MHEG (Reaffirmed 2004) Reference number lSO/tEC 13522-3:1997(E) The Canadian Standards Association, which operates under the name CSA International (CSA), under whose auspices this National Standard bas been produced, was chartered in 191 9 and accredited by the Standards Counc

4、il of Canada to the National Standards system in 1973. It is a not-for-profit, nonstatutory, voluntary membership association engaged in standards development and certification activities. and users - including manufacturers, consumers, retailers, unions and professional organizations, and governmen

5、tal agencies. The standards are used widely by industry and commerce and often adopted by municipal, provincial, and federal governments in their regulations, particularly in the fields of health, safety, building and construction, and the environment. indicate their support for CSAs standards devel

6、opment by volunteering their time and skills to CSA Committee work and supporting the Associations objectives through sustaining memberships. The more than 7000 committee volunteers and the 2000 sustaining memberships together form CSAs total membership from which its Directors are chosen. Sustainin

7、g memberships represent a major source of income for CSAs standards development activities. in support of and as an extension to its standards development activities. To ensure the integrity of its certification process, the Association regularly and continually audits and inspects products that bea

8、r the CSA Mark. Toronto, CSA has regional branch offices in major centres across Canada and inspection and testing agencies in eight countries. Since 191 9, the Association has developed the necessary expertise to meet its corporate mission: CSA is an independent service organization whose mission i

9、s to provide an open and effective forum for activities facilitating the exchange of goods and services through the use of standards, certification and related services to meet national and international needs. For futher information on CSA services, write to CSA International 178 Rexdale Boulevard

10、Toronto, Ontario, M9W 1 R3 Canada CSA standards reflect a national consensus of producers Individuals, companies, and associations across Canada The Association offers certification and testing services In addition to its head office and laboratory complex in CSA INTERNATIONAL / - The Standards Coun

11、cil of Canada is the coordinating body of the National Standards system, a federation of independent, autonomous organizations working towards the further development and improvement of voluntary standardization in the national interest. The principal objects of the Council are to foster and promote

12、 voluntary standardization as a means of advancing the national economy, benefiting the health, safety, and welfare of the public, assisting and protecting the consumer, facilitating domestic and international trade, and furthering international cooperation in the field of standards. has been approv

13、ed by the Standards Council of Canada and one which reflects a reasonable agreement among the views of a number of capable individuals whose collective interests provide to the greatest practicable extent a balance of representation of producers, users, consumers, and others with relevant interests,

14、 as may be appropriate to the subject in hand. It normally is a standard which is capable of making a significant and timely contribution to the national interest. Approval of a standard as a National Standard of Canada indicates that a standard conforms to the criteria and procedures established by

15、 the Standards Council of Canada. Approval does not refer to the technical content of the standard; this remains the continuing responsibility of the accredited sta nda rds-deve lo pmen t organ izatio n . Those who have a need to apply standards are encouraged to use National Standards of Canada whe

16、never practicable. These standards are subject to periodic review; therefore, users are cautioned to obtain the latest edition from the organization preparing the standard. The responsibility for approving National Standards of Canada rests with the Standards Council of Canada 45 OConnor Street, Sui

17、te 1200 Ottawa, Ontario, Kl P 6N7 Canada A National Standard of Canada is a standard which Although the intended primary application of this Standard is stated in its Scope, it is important to note that it remains the responsibility of the users to judge its suitability for their particular purpose.

18、 CAN/CSA-ISO/lfC 13522-3-00 Information technology - Coding of multimedia and hypermedia information - Part 3: MHEG scriDt interchanae remesentation CAN/CSA-ISO/IEC 13522-3-00 Infomation technolosy - Coding of multimedia and hypermedia information - Part 3: MHEG script interchange representation CSA

19、 Preface Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC joint Technical Committee 1 on Inf

20、ormation Technology (ISO/IEC JTCI ) for the Standards Council of Canada (SCC), the IS0 member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Teleph

21、one Consultative Committee (ITU-T). This International Standard was reviewed by the CSA TClT under the jurisdiction of the Strategic Steering Committee on Information Technology and deemed acceptable for use in Canada. (A committee membership list is available on request from the CSA Project Manager

22、.) From time to time, ISO/IEC may publish addenda, corrigenda, etc. The CSA TClT will review these documents for approval and publication. For a listing, refer to the CSA Information Products catalogue or CSA Info Update or contact a CSA Sales representative. This Standard has been formally approved

23、, without modification, by these Committees and has been approved as a National Standard of Canada by the Standards Council of Canada. February 2000 0 CSA lnternational- 2000 All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the

24、 publisher. lSO/lEC material is reprinted with permission. Inquiries regarding this National Standard of Canada should be addressed to CSA International, 7 78 Rexdale Boulevard, Toronto, Ontario, M9W 7 R3. February 2000 CSA/I I NTE R NATl 0 NAL STANDARD ISO/IEC 13522-3 First edition 1997-05-1 5 Info

25、rmation technology - Coding of multimedia and hypermedia information - Part 3: MHEG script interchange representation Technologies de lin formation - Codage de /information multimedia et hypermedia - Partie 3: Representation dinterechange script MHEG Reference number ISO/IEC 13522-3:1997(E) ISOA EC

26、1 3522-3 :1997( E) Contents 1 Scope 1 Context of the scope . 1 1.1 1.2 Scope of this part of ISO/IEC 13522 1 2 Normative references . 1 3 Definitions 2 4 Abbreviations . 6 5 Conformance . 7 5.1 . 1 Profiles 7 5.1.2 Encod in g 7 5.1.3 Syntax . 8 5.1.4 Semantics . 8 5.1 Information object conformance

27、7 . Implementation conformance 8 5.2.1 Conformance requirements . 8 5.2.2 Conformance documentation . 8 5.3 Application conformance . 9 5.4 Test Methods 9 5.2 6 Overview . 9 Access to external data and functions 10 6.1 Description methodology . 9 6-2 Data processing operations f0 6.3 7 MHEG/MHEG-3 r

28、elationship . 11 7.2 Functional entities 11 MHEG-SIR script interpreter . 12 MHEG entities 7.1 11 7.3 8 Elements of MHEG-SIR 12 8.1.1 Predefined types . 13 Primitive types . 13 8.1.1.1 . 1 void type 14 8.1.1 . 1 . 3 short type 14 8.1 -1 -1.5 unsigned short type 14 8.1 Data types 12 8.1.1.1 8.1.1 -1.

29、2 octet type 14 8.1.1.1.4 long type 14 8 ISOAEC 1997 All 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 publish

30、er . ISO/IEC Copyright Office- Case postale 56- CH-1211 Geneve 20 Switzerland 0 ISO/IEC ISOIIEC 13522-3:1997(E) 8.1 . 1 . 1 . 6 unsigned long type 14 8.1 .I . 1 . 7 float type 14 8.1 . 1. 1.8 doubte type 14 8.1 . 1 . 1 . 9 boolean type 14 8.1.1.1.1 0 character type 14 8.1.1.1.1 1 data identifier typ

31、e . 14 8.1.1.1.12 object reference type . 15 Predefined constructed types . 15 8.1.1.2 8.1.2 Declared constructed types . 15 8.1.2.1 sequence types 15 8.1.2.2 string types . 16 8.1.2.3 array types 16 8.1.2.5 union types . 17 Data . 17 8.2.1 Immediate values . 18 8.2.3.1 Global variables 19 8.2.3.2 L

32、ocal variables . 19 8.2.3.3 Dynamic variables 19 Functions 19 8.3.1 Routines . 20 8.3.3 Predefined functions 21 Messages . 21 8.4.1 Package exceptions . 21 8.4.2 Predefined messages 22 8.6 Identifiers 22 8.6.1 Type identifiers . 22 8.6.3 Function identifiers . 23 8.6.4 Message identifiers 23 8.1.2.4

33、 structure types 17 8.2 . 8.2.2 Constants 18 8.2.3 Variables 18 8.3 . 8.3.2 Services 20 8.4 . 8.5 tnstructions 22 Data identifiers . 8.6.2 23 9 The MHEG-SIR virtual machine . 23 9.1 9.2 Structure of the MHEG-SIR virtual machine . 24 Structures and notations . 24 9.2.1 Table . 24 9.2.3 Parameter stac

34、k . 25 9.2.4 Queue 25 9.2.5 Data representation . 25 9.3 Memory areas . 26 M h-script memory areas 26 9.3.1.1 Data areas 27 9.2.2 Stack . 24 9.3.1 9.3.1.1.1 Type definition table 27 9.3.1.1.2 Constant table . 27 9.3.1 . 1 . 3 Global variable definition table 27 Code areas . 27 9.3.1.2.1 Routine defi

35、nition table 27 9.3.1.2.2 Package definition table 28 9.3.1.2.3 Service definition table 28 9.3.1.2.4 Exception definition table . 28 9.3.1 2.5 Handler definition table 29 9.3.1.2.6 Program code area 29 9.3.1.2 . Ill ISO/IEC 13522-3:1997(E) 0 ISO/IEC 9.4 9.5 9.3.2 9.4.2 9.5.2 9.5.3 9.5.4 9.5.5 9.3.2

36、.2 Rt-script memory areas 29 9.3.2.1 9.3.2.1.1 Variable table . 29 Dynamic memory areas 29 9.3.2.1.2 Call stack 30 9.3.2.1.3 Parameter stack . 30 9.3.2.1.4 Message queue . 31 Heap . 9.3.2.1.5 31 Registers 31 9.3.2.2.1 Instruction pointer register . 32 9.3.2.2.2 Instruction register . 32 9.3.2.2.3 Er

37、ror register 32 frame pointer register . 32 Queue pointer register . 32 9.3.2.2.7 Function register 32 M h-script statuses 33 9.4.1.1 Not available . 33 9.3.2.2.4 9.3.2.2.5 9.3.2.2.6 Stack pointer register . 32 Script statuses 33 9.4.1 . . 9.4.1.2 Available 33 Rt-script statuses 33 9.4.2.1 Not ready

38、 . 33 9.4.2.2 Ready 33 9.4.2.3 Running 34 9.4.2.4 Erroneous . 34 Message reception . 9.5.1.1 9.5. I . 2 9.5.1.3 9.5.1.4 Processing units . 34 9.5.1 34 MHEG-3 API operations . 34 External exception 34 Instruction Execu tio n Error exception . 35 MHEG-3 API exception 35 Mh-script initialisation . 35 R

39、t-script initialisation MHEG-SIR instruction execution unit . 36 35 Rt-script execution unit 36 . 10 Provisions for run-time environment access 36 Invocation of external operations in an MHEG-SIR program 38 Handling of external exceptions in an MHEG-SIR program . 38 Invocation of external operations

40、 by an MHEG-3 engine . 38 Handling of external exceptions by an MHEG-3 engine . 38 10 .I General model 36 10.2 Declaration of IDL interfaces 37 10.3 10.4 10.5 10.6 f 0.7 Platform mapping specifications . 39 11 12 Provisions for MHEG object manipulation 39 Exchange of information with MHEG objects .

41、40 MHEG API exceptions 40 1 ?.I Invoking MHEG actions 39 11.1 . 1 Sending messages to other scripts 39 11.1.2 Receiving MHEG messages. 40 11.2.A MHEG-3 API run operations . 40 11.2.2 11.2 . . . . MHEG-SIR declarations 40 12.7 Type declaration 41 12.1.1 Type identifier 41 12.1.2 Type description 41 i

42、v . 0 ISOllEC ISOllEC 43522-3:1997(E) 12.4 12.5 12.6 12.1.2.1 String description 42 12.1.2.3 Array description 42 12.2 Constant declaration . 43 12.2.1 Data identifier . 43 12.2.2 Type identifier . 43 12.2.3 Constant value . 43 Global variable declaration . 44 12.3.1 Data identifier . 44 12.3.2 Type

43、 identifier . 44 12.3.3 Constant reference 44 Package declaration . 45 Package identifier . 45 12.4.3 Service description . 45 12.4.3.1 Function identifier . 45 12.4.3.3 Calling mode 46 12.4.3.4 Type identifier . 46 12.4.3.5 Parameter description 46 Exception description . 47 12.4.4.1 Message identi

44、fier 47 Handler declaration 47 12.5.1 Message identifier 48 12.5.2 Function identifier . 48 12.6.2 Type identifier . 48 12.6.3 Parameter description 48 12.6.3.2 Type identifier . 49 Local variable declaration 49 12.6.4.1 Data identifier . 49 12.6.4.2 Type identifier . 49 Program code 50 12.1.2.2 Seq

45、uence description . 42 12.1.2.4 Structure description 42 12.1.2.5 Union description 42 12.3 12.4. I 12.4.2 Name 45 12.4.3.2 Name 46 12.4.3.5.1 Passing mode 46 12.4.3.5.2 Type identifier 47 12.4.4.2 Parameter description 47 Routine declaration . 48 12.6.1 Function identifier . 48 12.6.3.1 Passing mod

46、e . 49 12.6.4.3 Constant reference., . 49 13.2 13.3 12.4.4 A 2.6.4 12.6.5 13 MHEG-SIR instructions 50 Presentation methodology 50 Error conditions 13.1.1 50 13.1.2 Formal specification . 51 13.1.3 Data table notation . 51 13.1.4 Template instruction notation . 51 13.1.5 Primitives 52 Classification

47、of MHEG-SIR instructions . Description of instructions 54 13.3.1 No operation . 54 13 . t 52 Yield 13.3.2 54 Return 13.3.3 54 Free . 13.3.4 55 Not . 13.3.5 55 ISOIIEC 13522-3: I 997( E) 0 ISOllEC 13.3.6 13.3.7 13.3.8 13.3.9 13.3.1 0 13.3.11 13.3.1 2 13.3.1 3 13.3.14 13.3.15 13.3.16 13.3.1 7 13.3.18

48、13.3.19 13.3.20 13.3.21 13.3.22 13.3.23 13.3.24 13.3.25 13.3.26 13.3.27 13.3.28 13.3.29 13.3.30 13.3.31 13.3.32 13.3.33 13.3.34 13.3.35 13.3.36 13.3.37 13.3.38 13.3.39 13.3.40 13.3.41 13.3.42 13.3.43 Or . 56 Exclusive or 56 And 57 Equal reference 57 Equal . 58 Less than 58 Greater than . 59 Add 59 S

49、ubtract 59 Multiply 60 Divide 60 Negate 61 Remainder 61 Duplicate 62 Convert 62 Jump on true 62 Jump on false . 63 Shift 64 Get object reference . 64 . . . Jump . 63 Long jump on true 65 Long jump on false . 65 tong jump . 65 Push 68 Push immediate 69 Pop 70 . . Call 66 External call 67 Push reference 69 . Pop reference . 70 Pop contents 70 Allocate 71 Increment 71 Get 72 Set 74 Set contents 75 . . Decrement 72 Get contents . 73 . . 13.4 Type conversion rules . 75 13.4.2 Lossless extensions 76 13.4.1 Reversible conversions 76 Conversions from boolean 76 Conversions from octet to