Add New{En,De}coder convenience functions

They use the default factory and accept the same arguments as the New
function of the factory interface does.

pkg/raptorq/default.go

@@ -0,0 +1,22 @@
+package raptorq
+
+import "github.com/harmony-one/go-raptorq/pkg/defaults"
+
+// NewEncoder creates and returns an encoder using the default factory.
+func NewEncoder(
+ input []byte, symbolSize uint16, minSubSymbolSize uint16,
+ maxSubBlockSize uint32, alignment uint8,
+) (enc Encoder, err error) {
+ factory := defaults.DefaultEncoderFactory()
+ return factory.New(
+ input, symbolSize, minSubSymbolSize, maxSubBlockSize, alignment,
+ )
+}
+
+// NewDecoder creates and returns a decoder using the default factory.
+func NewDecoder(commonOTI uint64, schemeSpecificOTI uint32) (
+ dec Decoder, err error,
+) {
+ factory := defaults.DefaultDecoderFactory()
+ return factory.New(commonOTI, schemeSpecificOTI)
+}