Method Encode

encode.go:26–44

Encode encodes data from reader and splits it into chunks to be futher converted to QR code frames.

(str string)

// Encode encodes data from reader and splits it into chunks to be
// futher converted to QR code frames.
func (e *Encoder) Encode(str string) ([]string, error) {
	if len(str) < e.chunkLen {
		return []string{e.frame(0, len(str), []byte(str))}, nil
	}

	numChunks := numberOfChunks(len(str), e.chunkLen)
	codec := fountain.NewLubyCodec(numChunks, rand.New(fountain.NewMersenneTwister(200)), solitonDistribution(numChunks))

	var msg = []byte(str) // copy of str, as EncodeLTBlock is destructive to msg
	idsToEncode := ids(int(float64(numChunks) * e.redundancyFactor))
	lubyBlocks := fountain.EncodeLTBlocks(msg, idsToEncode, codec)

	// TODO(divan): use sync.Pool as this probably will be used many times
	ret := make([]string, len(lubyBlocks))
	for i, block := range lubyBlocks {
		ret[i] = e.frame(block.BlockCode, len(str), block.Data)
	}
	return ret, nil
}

// SetRedundancyFactor changes the value of redundancy factor.
func (e *Encoder) SetRedundancyFactor(rf float64) {