algo/ximalaya/x2m_crypto.go

@@ -1,34 +0,0 @@
-package ximalaya
-
-import (
-	_ "embed"
-	"encoding/binary"
-)
-
-const x2mHeaderSize = 1024
-
-var x2mKey = [...]byte{'x', 'm', 'l', 'y'}
-var x2mScrambleTable = [x2mHeaderSize]uint16{}
-
-//go:embed x2m_scramble_table.bin
-var x2mScrambleTableBytes []byte
-
-func init() {
-	if len(x2mScrambleTableBytes) != 2*x2mHeaderSize {
-		panic("invalid x3m scramble table")
-	}
-	for i := range x3mScrambleTable {
-		x3mScrambleTable[i] = binary.LittleEndian.Uint16(x2mScrambleTableBytes[i*2:])
-	}
-}
-
-// decryptX2MHeader decrypts the header of ximalaya .x2m file.
-// make sure input src is 1024(x2mHeaderSize) bytes long.
-func decryptX2MHeader(src []byte) []byte {
-	dst := make([]byte, len(src))
-	for dstIdx := range src {
-		srcIdx := x2mScrambleTable[dstIdx]
-		dst[dstIdx] = src[srcIdx] ^ x2mKey[dstIdx%len(x2mKey)]
-	}
-	return dst
-}

algo/ximalaya/x3m_crypto.go

@@ -1,40 +0,0 @@
-package ximalaya
-
-import (
-	_ "embed"
-	"encoding/binary"
-)
-
-var x3mKey = [...]byte{
-	'3', '9', '8', '9', 'd', '1', '1', '1',
-	'a', 'a', 'd', '5', '6', '1', '3', '9',
-	'4', '0', 'f', '4', 'f', 'c', '4', '4',
-	'b', '6', '3', '9', 'b', '2', '9', '2',
-}
-
-const x3mHeaderSize = 1024
-
-var x3mScrambleTable = [x3mHeaderSize]uint16{}
-
-//go:embed x3m_scramble_table.bin
-var x3mScrambleTableBytes []byte
-
-func init() {
-	if len(x3mScrambleTableBytes) != 2*x3mHeaderSize {
-		panic("invalid x3m scramble table")
-	}
-	for i := range x3mScrambleTable {
-		x3mScrambleTable[i] = binary.LittleEndian.Uint16(x3mScrambleTableBytes[i*2:])
-	}
-}
-
-// decryptX3MHeader decrypts the header of ximalaya .x3m file.
-// make sure input src is 1024 (x3mHeaderSize) bytes long.
-func decryptX3MHeader(src []byte) []byte {
-	dst := make([]byte, len(src))
-	for dstIdx := range src {
-		srcIdx := x3mScrambleTable[dstIdx]
-		dst[dstIdx] = src[srcIdx] ^ x3mKey[dstIdx%len(x3mKey)]
-	}
-	return dst
-}

algo/ximalaya/ximalaya.go

@@ -1,56 +0,0 @@
-package ximalaya
-
-import (
-	"bytes"
-	"fmt"
-	"io"
-
-	"unlock-music.dev/cli/algo/common"
-)
-
-type Decoder struct {
-	rd     io.ReadSeeker
-	offset int
-
-	audio io.Reader
-}
-
-func NewDecoder(rd io.ReadSeeker) common.Decoder {
-	return &Decoder{rd: rd}
-}
-
-func (d *Decoder) Validate() error {
-	encryptedHeader := make([]byte, x2mHeaderSize)
-	if _, err := io.ReadFull(d.rd, encryptedHeader); err != nil {
-		return fmt.Errorf("ximalaya read header: %w", err)
-	}
-
-	{ // try to decode with x2m
-		header := decryptX2MHeader(encryptedHeader)
-		if _, ok := common.SniffAll(header); ok {
-			d.audio = io.MultiReader(bytes.NewReader(header), d.rd)
-			return nil
-		}
-	}
-
-	{ // try to decode with x3m
-		// not read file again, since x2m and x3m have the same header size
-		header := decryptX3MHeader(encryptedHeader)
-		if _, ok := common.SniffAll(header); ok {
-			d.audio = io.MultiReader(bytes.NewReader(header), d.rd)
-			return nil
-		}
-	}
-
-	return fmt.Errorf("ximalaya: unknown format")
-}
-
-func (d *Decoder) Read(p []byte) (n int, err error) {
-	return d.audio.Read(p)
-}
-
-func init() {
-	common.RegisterDecoder("x2m", false, NewDecoder)
-	common.RegisterDecoder("x3m", false, NewDecoder)
-	common.RegisterDecoder("xm", false, NewDecoder)
-}

cmd/um/main.go

@@ -23,7 +23,6 @@ import (
 	_ "unlock-music.dev/cli/algo/qmc"
 	_ "unlock-music.dev/cli/algo/tm"
 	_ "unlock-music.dev/cli/algo/xiami"
-	_ "unlock-music.dev/cli/algo/ximalaya"
 	"unlock-music.dev/cli/internal/logging"
 )