M. Hamalainen Internet Draft Nokia Document: draft-hamalainen-mobile-xmf-mimetype-00.txt T. White MMA Expires: December 2004 July 2004 Registration of MIME media type audio/mobile-xmf Status of this Memo By submitting this Internet-Draft, I certify that any applicable patent or other IPR claims of which I am aware have been disclosed, or will be disclosed, and any of which I become aware will be disclosed, in accordance with RFC 3668. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. This document is an individual submission to the IETF. Comments should be directed to the authors. Abstract MIDI Manufacturers Association (MMA) and Association of Music Electronics industry (AMEI) have recently produced the Mobile XMF standard [1]. The Mobile XMF standard has been developed in particularly for mobile MIDI [6] applications. Mobile XMF information is a very compact media type providing high quality synthetic audio content for music downloading and messaging applications that require MIME registration. Hamalainen & White [Page 1] Mobile XMF MIME July, 2004 1 Introduction MIDI content is commonly used in the Internet. Commonly MIDI information is stored in the Standard MIDI File (SMF) format [7]. The present MIME type registration uses the Mobile XMF file format for the encapsulation of SP-MIDI [3,4] and Mobile DLS [2] data. 2 Registration of audio/mobile-xmf MIME media type name: audio MIME subtype name: mobile-xmf Required parameters: none Optional parameters: prl prl is a string (inside double quotation marks ææ ÆÆ) containing the playback resources included in all Content Description MetaDataItems of the Mobile XMF file. The string contains two digit hexadecimal numbers representing data bytes from the Content Description Meta Data. The same resource is listed only once. A playback resource contains two parts: a prefix and data. If the file includes Playback Resource Lists such as [00h 01h 00h 02h] and [00h 01h 00h 03h], the corresponding prl is ææ000100020003ÆÆ containing playback resources 01, 02, and 03 with the prefix 00. minimum-pr minimum-pr is a string containing the Maximum Instantaneous Resource (MIR) values from the first row of all MIR Count Tables corresponding to the playback resources listed in prl. Only the largest value from the values of the same resource is chosen. If the file includes first rows of MIR Count Tables such as [02h 00h] and [01h 01h] corresponding to the above Playback Resource Lists, the corresponding minimum-pr is ææ020001ÆÆ. (02 is the largest of 2 and 1, 00 is the largest of 0, and 01 is the largest of 1.) minimum-pr requires the use of prl and the values in minimum-pr must be in the same order as the resources in prl. minimum-pr is the most important of minimum-pr and total-pr, because it defines the minimum playback requirements. total-pr total-pr is a string containing the MIR values from the last row of all MIR Count Tables corresponding to the playback resources listed in prl. Only the largest value from the values of the same resource is chosen. If the file includes last rows Hamalainen & White July 2004 [Page 2] Mobile XMF MIME July, 2004 of MIR Count Tables such as [05h 02h] and [06h 01h] corresponding to the above Playback Resource Lists, the corresponding total-pr is ææ060201ÆÆ. (06 is the largest of 5 and 6, 02 is the largest of 2, and 01 is the largest of 1.) total- pr requires the use of prl and the values in total-pr must be in the same order as the resources in prl. Encoding considerations: mobile-xmf data is binary data and must be encoded for non- binary transport; Base64 is suitable for Email Security considerations: Many synthetic audio compositions have associated intellectual property rights. It is conceivable that rights owners of mobile-xmf content will want to protect their rights by applying security mechanisms that prohibit the rendering of the content without a legally acquired license to do so. These mechanisms would be applied externally to the Content-Type defined here; mobile-xmf content itself is not encrypted internally. mobile-xmf streams do not contain executable content. Interoperability considerations: Mobile XMF is a Musical Instrument Digital Interface (MIDI) specification developed by MMA and AMEI. mobile-xmf is based on the XMF 1.0 specification [5] which standardizes a meta file format for the electronic distribution of music. mobile-xmf data is stored in XMF file format [5]. Published specification: There are no previous RFC documents on audio/mobile-xmf. References: 1 Mobile XMF Content Format Specification, MMA specification v1.0., RP-42, Los Angeles, CA, USA. 2004. 2 Mobile DLS, MMA specification v1.0., RP-41, Los Angeles, CA, USA. 2004. 3 Scalable Polyphony MIDI Specification. December 2001, RP- 034, The MIDI Manufacturers Association, Los Angeles, CA, USA. 4 Scalable Polyphony MIDI Device 5-24 Note Profile for 3GPP, December 2001, RP-035, The MIDI Manufacturers Association, Los Angeles, CA, USA. 5 Specification for XMF Meta File Format, Version 1.00b. The MIDI Manufacturers Association, Los Angeles, CA, USA, 2001. Hamalainen & White July 2004 [Page 3] Mobile XMF MIME July, 2004 6 MIDI 1.0 Detailed Specification, Document Version 4.2. February 1996, In æThe Complete MIDI 1.0 Detailed Specification, Document Version 96.1.Æ The MIDI Manufacturers Association., Los Angeles, CA, USA. 7 Standard MIDI Files 1.0, In æThe Complete MIDI 1.0 Detailed Specification, Document Version 96.1.Æ The MIDI Manufacturers Association., Los Angeles, CA, USA. Applications which use this media type: mobile-xmf is a synthetic audio format for the flexible presentation of SP-MIDI and Mobile DLS instrument data on a wide range of playback devices, particularly portable appliances such as mobile phones, PDAs, and palmtop computers. Additional information: Magic number(s): First twelve bytes: \130\115\106\137\062\056\060\060\000\000\000\002 File extension(s): mxmf Macintosh File Type Code(s): mxmf Intended usage: COMMON 3 IANA Considerations Section 2 of this document registers one MIME subtype. 4 Security Considerations Security considerations are specified in the MIME subtype registration contained in Section 2. 5 Authors' Addresses Matti Hamalainen Nokia P.O. Box 100 (Visiokatu 1) FIN-33721 Tampere, Finland Tel: +358 7180 35789 Fax: +358 7180 35899 Email: matti.s.hamalainen@nokia.com Hamalainen & White July 2004 [Page 4] Mobile XMF MIME July, 2004 Tom White, MIDI Manufacturers Association P.O. Box 3173 La Habra CA 90632-3173 Tel (714) 736-9774 Fax (714) 736-9775 Email: mma@midi.org Author/Change controller: Matti Hamalainen Nokia P.O. Box 100 (Visiokatu 1) FIN-33721 Tampere, Finland Tel: +358 7180 35789 Fax: +358 7180 35899 matti.s.hamalainen@nokia.com 6 Copyright notice Copyright (C) The Internet Society (2004). This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the authors retain all their rights. This document and the information contained herein are provided on an "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Hamalainen & White July 2004 [Page 5]