Floaout

Floaout is the next-generation audio format.

Bubble File Format Specification

Metadata

LpcmKind

BubSampleKind

CRC

Algorithm::<u32> {
    endian: Endian::Little,
    poly: 0x93a409eb, // CRC-32K/4.2
    init: 0xffffffff,
    refin: true,
    refout: true,
    xorout: 0xffffffff,
    residue: 0x76e908ce,
}

Each Sample

| Bubble Sample | | BubbleSample |

Bubble Sample

Sample Data

Lpcm

Expr

Keywords

Variables

Constants

Functions

Others

Punctuation

Delimiters

Syntax

// BubFns
BubFns = BubFn ZeroOrMoreBubFns / f
ZeroOrMoreBubFns = SpaceAndBubFn ZeroOrMoreBubFns / ()

SpaceAndBubFn = Space BubFn / f

// BubFn
// BubFn = Sum Space Sum Space Sum Space OrOrExpr Space Sum
BubFn = SumAndSpace BubFn1 / f
BubFn1 = SumAndSpace BubFn2 / f
BubFn2 = SumAndSpace BubFn3 / f
BubFn3 = OrOrExprAndSpace BubFn4 / f
BubFn4 = Sum () / f

SumAndSpace = Sum Space / f
OrOrExprAndSpace = OrOrExpr Space / f

// OrOr Expr
OrOrExpr = AndAndExpr OrOrExpr1 / AndAndExpr
OrOrExpr1 = OrOr OrOrExpr / f

OrOr = "||" () / f

// AndAnd Expr
AndAndExpr = ComparisonExpr AndAndExpr1 / ComparisonExpr
AndAndExpr1 = AndAnd AndAndExpr / f

AndAnd = "&&" () / f

// Comparison Expr
ComparisonExpr = Sum ComparisonExpr1 / f
ComparisonExpr1 = Comparison Sum / f

Comparison = EqEq () / Comparison1
Comparison1 = Ne () / Comparison2
Comparison2 = Ge () / Comparison3
Comparison3 = Le () / Comparison4
Comparison4 = Gt () / Comparison5
Comparison5 = Lt () / f

EqEq = "==" () / f
Ne = "!=" () / f
Ge = ">=" () / f
Le = "<=" () / f
Gt = '>' () / f
Lt = '<' () / f

// Sum
Sum = Term ZeroOrMorePlusOrMinusAndTerms / f
ZeroOrMorePlusOrMinusAndTerms = PlusOrMinusAndTerm ZeroOrMorePlusOrMinusAndTerms / ()
PlusOrMinusAndTerm = PlusOrMinus Term / f

// Term
Term = Factor ZeroOrMoreStarOrSlashAndFactors / f
ZeroOrMoreStarOrSlashAndFactors = StarOrSlashAndFactor ZeroOrMoreStarOrSlashAndFactors / ()
StarOrSlashAndFactor = StarOrSlash Factor / f

// Factor
Factor = PlusOrMinus Factor / Power

// Power
Power = Atom PowerAndFactor / Atom
PowerAndFactor = '^' Factor / f

// Atom
Atom = ExprInParentheses () / Atom1
Atom1 = FloatLiteral () / Atom2
Atom2 = IntegerLiteral () / Atom3
Atom3 = Function () / Atom4
Atom4 = Variable () / Atom5
Atom5 = Constant () / f

// Variable
Variable = UppercaseX () / Variable1
Variable1 = UppercaseY () / Variable2
Variable2 = UppercaseZ () / Variable3
Variable3 = LowercaseX () / Variable4
Variable4 = LowercaseY () / Variable5
Variable5 = LowercaseZ () / Variable6
Variable6 = UppercaseN () / Variable7
Variable7 = LowercaseN () / Variable8
Variable8 = UppercaseF () / Variable9
Variable9 = UppercaseS () / f

UppercaseX = 'X' () / f
UppercaseY = 'Y' () / f
UppercaseZ = 'Z' () / f
LowercaseX = 'x' () / f
LowercaseY = 'y' () / f
LowercaseZ = 'z' () / f
UppercaseN = 'N' () / f
LowercaseN = 'n' () / f
UppercaseF = 'F' () / f
UppercaseS = 'S' () / f

// Constant
Constant = E () / Constant1
Constant1 = Pi () / f

E = 'E' () / f
Pi = "PI" () / f

// Function
Function = Sine () / Function1
Function1 = Cosine () / Function2
Function2 = Tangent () / Function3
Function3 = Ln () / Function4
Function4 = Lg () / f

Sine = "sin" Factor / f
Cosine = "cos" Factor / f
Tangent = "tan" Factor / f
Ln = "ln" Factor / f
Lg = "lg" Factor / f

// Delimiters
ExprInParentheses = '(' ExprAndClose / f
ExprAndClose = Sum ')' / f

// Integer
IntegerLiteral = DecLiteral () / f

// Float
FloatLiteral = DecLiteral PointAndDecLiteral / BytesF64Literal
PointAndDecLiteral = '.' DecLiteral / f

BytesF64Literal = 'b' ???????? / f

// Dec
DecLiteral = DecDigit ZeroOrMoreDecDigits / f
ZeroOrMoreDecDigits = DecDigit ZeroOrMoreDecDigits / ()

DecDigit = '0' () / DecDigit1
DecDigit1 = '1' () / DecDigit2
DecDigit2 = '2' () / DecDigit3
DecDigit3 = '3' () / DecDigit4
DecDigit4 = '4' () / DecDigit5
DecDigit5 = '5' () / DecDigit6
DecDigit6 = '6' () / DecDigit7
DecDigit7 = '7' () / DecDigit8
DecDigit8 = '8' () / '9'

// Others
PlusOrMinus = Plus () / PlusOrMinus1
PlusOrMinus1 = Minus () / f
Plus = '+' () / f
Minus = '-' () / f

StarOrSlash = Star () / StarOrSlash1
StarOrSlash1 = Slash () / f
Star = '*' () / f
Slash = '/' () / f

Space = ' ' () / f

Floaout File Format Specification

Metadata

Each Bubble

Bubble Files will be 'i.bub' (i = 0, ... , Bubbles - 1)

Library License

• MIT OR Apache-2.0

Format License

• Except modify or derive from these formats specification, anyone can use or create these formats the way each wants.

• these formats = { Bubble, Floaout }

(As a precaution, copyrights and other intellectual property rights belong to the artists and their associates.)

TODO

• Use generic type in Color and Space.
• Add read_bub_fns_block in BubFrameReader
• error handling
• Clarify whether #[derive(Order)] is needed
• Add Position field in BubfnsInterpreter
• Check file is supported version or not
• Parallel computing
• Add Functions like pow, sinh, ...