procedure
( read-riff [in])→(is-a?/c riff% )
in:input-port? =(current-input-port )
(read-riff indispatch)→(is-a?/c riff% )
in:input-port?
dispatch:(-> bytes? (or/c (subclass?/c riff% )#f))

Reads RIFF data from in and returns it. If dispatch is supplied, it must be a procedure accepting a four-byte chunk ID, and returning a subclass of riff% or #f if no special handling is required.

procedure
( write-riff v[out])→void?
v:(is-a?/c riff% )
out:output-port? =(current-output-port )

Writes the RIFF object v to out.

2Binary Classes🔗 i

class
riff% :class?

superclass:object%

extends: binary<%>

The base type for all RIFF data.

constructor
( new riff% [idid][sizesize])→(is-a?/c riff% )
id:bytes?
size:exact-nonnegative-integer?

class
riff:chunk% :class?

superclass:riff%

Represents a raw chunk.

constructor
( new riff:chunk%
[datadata]
...superclass-args...)
→(is-a?/c riff:chunk% )
data:bytes?

class
riff:list% :class?

superclass:riff%

Represents a list chunk.

constructor
( new riff:list%
[typetype]
[chunkschunks]
...superclass-args...) → (is-a?/c riff:list% )
type:bytes?
chunks:(listof (is-a?/c riff% ))

method
(send a-riff:list chunk-ref id...+)→(or/c (is-a?/c riff% )#f)
id:bytes?
Returns the first sub-chunk with ID matching id. If multiple ids are supplied, they refer to nested sub-chunks.

value
fourcc :binary? =(bytestring 4)

A binary type for reading chunk IDs.

procedure
( pad/word type)→binary?
type:binary?

Returns a binary type based on type, with padding to the nearest word.

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