riff

type Chunk struct {
	ChunkID   []byte
	ChunkSize uint32
	RIFFReader
}

type RIFFChunk struct {
	FileSize uint32
	FileType []byte
	Chunks   []*Chunk
}

type RIFFReader interface {
	io.Reader
	io.ReaderAt
}

type Reader struct {
	RIFFReader
}

type Writer struct {
	io.Writer
}