Update RawDecoder & Support .kwm as .aac

README.md

@@ -1,18 +1,25 @@
 # Unlock Music Project - CLI Edition
+
 Original: Web Edition https://github.com/ix64/unlock-music
+
 - [Release Download](https://github.com/unlock-music/cli/releases/latest)
 
 ## Features
+
 - [x] All Algorithm Supported By `ix64/unlock-music`
 - [ ] Complete Cover Image
 - [ ] Parse Meta Data
 - [ ] Complete Meta Data
 
 ## Hou to Build
+
 - Requirements: **Golang 1.16**
 
 1. Clone this repo `git clone https://github.com/unlock-music/cli && cd cli`
-2. Build the executable `go build ./cmd/um` 
+2. Build the executable `go build ./cmd/um`
 
 ## How to use
+
+- Drag the encrypted file to `um.exe` (Tested on Windows)
+- Run: `./um [-o <output dir>] [-i] <input dir/file>`
 - Use `./um -h` to show help menu

algo/common/raw.go

@@ -1,17 +1,24 @@
 package common
 
+import "errors"
+
 type RawDecoder struct {
 	file     []byte
 	audioExt string
 }
 
-//goland:noinspection GoUnusedExportedFunction
 func NewRawDecoder(file []byte) Decoder {
 	return &RawDecoder{file: file}
 }
 
-func (d RawDecoder) Validate() error {
-	return nil
+func (d *RawDecoder) Validate() error {
+	for ext, sniffer := range snifferRegistry {
+		if sniffer(d.file) {
+			d.audioExt = ext
+			return nil
+		}
+	}
+	return errors.New("audio doesn't recognized")
 }
 
 func (d RawDecoder) Decode() error {
@@ -27,21 +34,19 @@ func (d RawDecoder) GetAudioData() []byte {
 }
 
 func (d RawDecoder) GetAudioExt() string {
-	return "." + d.audioExt
+	return d.audioExt
 }
 
 func (d RawDecoder) GetMeta() Meta {
 	return nil
 }
-func DecoderFuncWithExt(ext string) NewDecoderFunc {
-	return func(file []byte) Decoder {
-		return &RawDecoder{file: file, audioExt: ext}
-	}
-}
+
 func init() {
-	/*RegisterDecoder("mp3", DecoderFuncWithExt("mp3"))
-	RegisterDecoder("flac", DecoderFuncWithExt("flac"))
-	RegisterDecoder("wav", DecoderFuncWithExt("wav"))
-	RegisterDecoder("ogg", DecoderFuncWithExt("ogg"))
-	RegisterDecoder("m4a", DecoderFuncWithExt("m4a"))*/
+	RegisterDecoder("mp3", NewRawDecoder)
+	RegisterDecoder("flac", NewRawDecoder)
+	RegisterDecoder("ogg", NewRawDecoder)
+	RegisterDecoder("m4a", NewRawDecoder)
+	RegisterDecoder("wav", NewRawDecoder)
+	RegisterDecoder("wma", NewRawDecoder)
+	RegisterDecoder("aac", NewRawDecoder)
 }

algo/common/sniff.go

@@ -5,12 +5,13 @@ import "bytes"
 type Sniffer func(header []byte) bool
 
 var snifferRegistry = map[string]Sniffer{
-	".m4a":  SnifferM4A,
-	".ogg":  SnifferOGG,
+	".mp3":  SnifferMP3,
 	".flac": SnifferFLAC,
+	".ogg":  SnifferOGG,
+	".m4a":  SnifferM4A,
 	".wav":  SnifferWAV,
 	".wma":  SnifferWMA,
-	".mp3":  SnifferMP3,
+	".aac":  SnifferAAC,
 }
 
 func SniffAll(header []byte) (string, bool) {
@@ -42,3 +43,6 @@ func SnifferWAV(header []byte) bool {
 func SnifferWMA(header []byte) bool {
 	return bytes.HasPrefix(header, []byte("\x30\x26\xb2\x75\x8e\x66\xcf\x11\xa6\xd9\x00\xaa\x00\x62\xce\x6c"))
 }
+func SnifferAAC(header []byte) bool {
+	return bytes.HasPrefix(header, []byte{0xFF, 0xF1})
+}

algo/kgm/kgm.go

@@ -40,7 +40,7 @@ func (d Decoder) GetAudioData() []byte {
 }
 
 func (d Decoder) GetAudioExt() string {
-	return ""
+	return "" // use sniffer
 }
 
 func (d Decoder) GetMeta() common.Meta {
@@ -58,9 +58,8 @@ func (d *Decoder) Validate() error {
 
 	d.key = d.file[0x1c:0x2c]
 	d.key = append(d.key, 0x00)
-	_ = d.file[0x2c:0x3c] //key2
+	_ = d.file[0x2c:0x3c] //todo: key2
 	return nil
-
 }
 
 func (d *Decoder) Decode() error {
@@ -69,7 +68,8 @@ func (d *Decoder) Decode() error {
 	lenData := len(dataEncrypted)
 	initMask()
 	if fullMaskLen < lenData {
-		logging.Log().Warn("文件过大，处理后的音频不完整,请向我们报告此文件的信息")
+		logging.Log().Warn("The file is too large and the processed audio is incomplete, " +
+			"please report to us about this file at https://github.com/unlock-music/cli/issues")
 		lenData = fullMaskLen
 	}
 	d.audio = make([]byte, lenData)

algo/kgm/mask.go

@@ -41,7 +41,7 @@ var maskV2 []byte
 var fullMaskLen int
 var initMaskOK = false
 
-//todo: 根据需求解压Mask大小
+//todo: decompress mask on demand
 func initMask() {
 	if initMaskOK {
 		return

algo/kwm/kwm.go

@@ -125,4 +125,5 @@ func padOrTruncate(raw string, length int) string {
 func init() {
 	// Kuwo Mp3/Flac
 	common.RegisterDecoder("kwm", NewDecoder)
+	common.RegisterDecoder("kwm", common.NewRawDecoder)
 }

algo/ncm/ncm.go

@@ -61,7 +61,6 @@ func (d *Decoder) Validate() error {
 	return nil
 }
 
-//todo: 读取前进行检查长度，防止越界
 func (d *Decoder) readKeyData() error {
 	if d.offsetKey == 0 || d.offsetKey+4 > d.fileLen {
 		return errors.New("invalid cover file offset")

algo/tm/tm.go

@@ -73,7 +73,7 @@ func init() {
 	common.RegisterDecoder("tm2", DecoderFuncWithExt("m4a"))
 	common.RegisterDecoder("tm6", DecoderFuncWithExt("m4a"))
 	// QQ Music IOS Mp3
-	common.RegisterDecoder("tm0", common.DecoderFuncWithExt("mp3"))
-	common.RegisterDecoder("tm3", common.DecoderFuncWithExt("mp3"))
+	common.RegisterDecoder("tm0", common.NewRawDecoder)
+	common.RegisterDecoder("tm3", common.NewRawDecoder)
 
 }

cmd/um/main.go

@@ -12,13 +12,12 @@ import (
 	"github.com/unlock-music/cli/internal/logging"
 	"github.com/urfave/cli/v2"
 	"go.uber.org/zap"
-	"log"
 	"os"
 	"path/filepath"
 	"strings"
 )
 
-var AppVersion = "0.0.3"
+var AppVersion = "0.0.4"
 
 func main() {
 	app := cli.App{
@@ -27,23 +26,36 @@ func main() {
 		Usage:    "Unlock your encrypted music file https://github.com/unlock-music/cli",
 		Version:  AppVersion,
 		Flags: []cli.Flag{
-			&cli.StringFlag{Name: "input", Aliases: []string{"i"}, Usage: "path to input file or dir", Required: true},
-			&cli.StringFlag{Name: "output", Aliases: []string{"o"}, Usage: "path to output dir", Required: true},
+			&cli.StringFlag{Name: "input", Aliases: []string{"i"}, Usage: "path to input file or dir", Required: false},
+			&cli.StringFlag{Name: "output", Aliases: []string{"o"}, Usage: "path to output dir", Required: false},
 		},
+
 		Action:          appMain,
-		Copyright:       "Copyright (c) 2020 Unlock Music https://github.com/unlock-music/cli/blob/master/LICENSE",
+		Copyright:       "Copyright (c) 2020 - 2021 Unlock Music https://github.com/unlock-music/cli/blob/master/LICENSE",
 		HideHelpCommand: true,
-		UsageText:       "um -i /path/to/input -o /path/to/output/dir",
+		UsageText:       "um [-o /path/to/output/dir] [-i] /path/to/input",
 	}
 	err := app.Run(os.Args)
 	if err != nil {
-		log.Fatal(err)
+		logging.Log().Fatal("run app failed", zap.Error(err))
 	}
 }
 
 func appMain(c *cli.Context) error {
 	input := c.String("input")
+	if input == "" && c.Args().Present() {
+		input = c.Args().Get(c.Args().Len() - 1)
+	}
+
 	output := c.String("output")
+	if output == "" {
+		var err error
+		output, err = os.Getwd()
+		if err != nil {
+			return err
+		}
+	}
+
 	inputStat, err := os.Stat(input)
 	if err != nil {
 		return err