init: dec-music 项目初始化

2026-05-23 12:55:48 +08:00
commit 21045d0aad
50 changed files with 3662 additions and 0 deletions
@@ -0,0 +1,50 @@
+package fileutil
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+var (
+	standardMediaExts = map[string]struct{}{
+		".mp3": {}, ".flac": {}, ".wav": {}, ".m4a": {},
+		".ogg": {}, ".opus": {}, ".aac": {}, ".wma": {},
+		".ape": {}, ".alac": {}, ".dsf": {}, ".dff": {},
+	}
+	encryptedMediaExts = map[string]struct{}{
+		".kgma": {}, ".kgm": {},
+		".ncm":  {},
+		".qmc": {}, ".qmc0": {}, ".qmc3": {}, ".qmcflac": {}, ".qmcogg": {},
+		".mgg": {}, ".mflac": {},
+		".tm": {}, ".tkm": {},
+		".xiami": {}, ".xm": {},
+		".ximalaya": {}, ".xmly": {},
+		".x2m": {}, ".x3m": {},
+		".kwm": {},
+	}
+	videoMediaExts = map[string]struct{}{
+		".mp4": {}, ".mkv": {}, ".avi": {}, ".mov": {}, ".flv": {},
+	}
+)
+
+// IsMediaFile reports whether the file name looks like a media file this tool handles.
+func IsMediaFile(fileName string) bool {
+	ext := strings.ToLower(filepath.Ext(fileName))
+	if _, ok := standardMediaExts[ext]; ok {
+		return true
+	}
+	if _, ok := encryptedMediaExts[ext]; ok {
+		return true
+	}
+	if _, ok := videoMediaExts[ext]; ok {
+		return true
+	}
+	return false
+}
+
+// FileExist reports whether path exists.
+func FileExist(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil
+}