func (e *encoder) emitHuff(h huffIndex, value int32) {
	x := theHuffmanLUT[h][value]
	e.emit(x&(1<<24-1), x>>24)
}

// emitHuffRLE emits a run of runLength copies of value encoded with the given
// Huffman encoder.
func (e *encoder) emitHuffRLE(h huffIndex, runLength, value int32) {
	a, b := value, value
	if a < 0 {
		a, b = -value, value-1
	}
	var nBits uint32
	if a < 0x100 {