-- ASN description of MPEG Audio
-- Written by Shaun Jackman <sjackman@gmail.com>
-- Copyright 2007 Shaun Jackman
--
-- This program is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License.

MPEG DEFINITIONS ::= BEGIN

Audio ::= SEQUENCE {
	sync           BIT STRING (SIZE (11)),
	version        ENUMERATED
		{ mpeg-2-5(0), reserved(1), mpeg-2(2), mpeg-1(3) },
	layer          ENUMERATED
		{ reserved(0), layer-3(1), layer-2(2), layer-1(3) },
	protection     ENUMERATED { crc(0), none(1) },
	bitrate        INTEGER (0..15),
	frequency      INTEGER (0..3),
	padding        BOOLEAN,
	private        BOOLEAN,
	channel-mode   ENUMERATED
		{ stereo(0), joint-stereo(1), dual-channel(2), single-channel(3) },
	mode-extension INTEGER (0..3),
	copyright      BOOLEAN,
	original       BOOLEAN,
	emphasis       ENUMERATED
		{ none(0), em-50-15-ms(1), reserved(2), ccit-j-17(3) }
}

ID3v1 ::= SEQUENCE {
	tag     OCTET STRING (SIZE (3)),
	title   OCTET STRING (SIZE (30)),
	artist  OCTET STRING (SIZE (30)),
	album   OCTET STRING (SIZE (30)),
	year    OCTET STRING (SIZE (4)),
	comment OCTET STRING (SIZE (28)),
	must-be-zero INTEGER (0..255),
	track INTEGER (0..255),
	genre INTEGER {
		blues(0), classic-rock(1), country(2), dance(3), disco(4),
		funk(5), grunge(6), hip-hop(7), jazz(8), metal(9),
		new-age(10), oldies(11), other(12), pop(13), r-and-b(14),
		rap(15), reggae(16), rock(17), techno(18), industrial(19),
		alternative(20), ska(21), death-metal(22), pranks(23),
		soundtrack(24), euro-techno(25), ambient(26), trip-hop(27),
		vocal(28), jazz-and-funk(29), fusion(30), trance(31),
		classical(32), instrumental(33), acid(34), house(35),
		game(36), sound-clip(37), gospel(38), noise(39),
		alternative-rock(40), bass(41), soul(42), punk(43), space(44),
		meditative(45), instrumental-pop(46), instrumental-rock(47),
		ethnic(48), gothic(49), darkwave(50), techno-industrial(51),
		electronic(52), pop-folk(53), eurodance(54), dream(55),
		southern-rock(56), comedy(57), cult(58), gangsta(59),
		top-40(60), christian-rap(61), pop-funk(62), jungle(63),
		native-american(64), cabaret(65), new-wave(66),
		psychadelic(67), rave(68), showtunes(69), trailer(70),
		lo-fi(71), tribal(72), acid-punk(73), acid-jazz(74),
		polka(75), retro(76), musical(77), rock-and-roll(78),
		hard-rock(79), folk(80), folk-rock(81), national-folk(82),
		swing(83), fast-fusion(84), bebob(85), latin(86), revival(87),
		celtic(88), bluegrass(89), avantgarde(90), gothic-rock(91),
		progressive-rock(92), psychedelic-rock(93),
		symphonic-rock(94), slow-rock(95), big-band(96), chorus(97),
		easy-listening(98), acoustic(99), humour(100), speech(101),
		chanson(102), opera(103), chamber-music(104), sonata(105),
		symphony(106), booty-bass(107), primus(108), porn-groove(109),
		satire(110), slow-jam(111), club(112), tango(113), samba(114),
		folklore(115), ballad(116), power-ballad(117),
		rhythmic-soul(118), freestyle(119), duet(120), punk-rock(121),
		drum-solo(122), a-cappella(123), euro-house(124),
		dance-hall(125)
	} (0..255)
}

END