docs: update readme about go version and how to build from source

chore: bump golang and dependency version
chore: bump version to v0.2.11
2024-11-22 00:57:09 +09:00 · 2024-11-22 00:50:52 +09:00 · 2024-11-05 16:56:40 +09:00 · 2024-11-05 16:27:14 +09:00 · 2024-11-04 14:25:02 +09:00 · 2024-11-04 14:24:32 +09:00
37 changed files with 2570 additions and 338 deletions
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@ -0,0 +1,148 @@
+// generate .drone.yaml, run:
+// drone jsonnet --format --stream
+
+
+local CreateRelease() = {
+  name: 'create release',
+  image: 'plugins/gitea-release',
+  settings: {
+    api_key: { from_secret: 'GITEA_API_KEY' },
+    base_url: 'https://git.unlock-music.dev',
+    files: [
+      'um-*.tar.gz',
+      'um-*.zip',
+    ],
+    checksum: 'sha256',
+    draft: true,
+    title: '${DRONE_TAG}',
+  },
+};
+
+
+local StepGoBuild(GOOS, GOARCH) = {
+  local windows = GOOS == 'windows',
+  local archiveExt = if windows then 'zip' else 'tar.gz',
+  local filepath = 'dist/um-%s-%s-%s.%s' % [GOOS, GOARCH, '$(git describe --tags --always)', archiveExt],
+
+  local archive = if windows then [
+    // Ensure zip is installed
+    'command -v zip >/dev/null || (apt update && apt install -y zip)',
+    'zip -9 -j -r "%s" $DIST_DIR' % filepath,
+  ] else [
+    'tar -c -C $DIST_DIR um | gzip -9 > "%s"' % filepath,
+  ],
+
+  name: 'go build %s/%s' % [GOOS, GOARCH],
+  image: 'golang:1.23',
+  environment: {
+    GOOS: GOOS,
+    GOARCH: GOARCH,
+    GOPROXY: 'https://goproxy.io,direct',
+  },
+  commands: [
+    'DIST_DIR=$(mktemp -d)',
+    'go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags --always)" -o $DIST_DIR ./cmd/um',
+    'mkdir -p dist',
+  ] + archive,
+};
+
+local StepUploadArtifact(GOOS, GOARCH) = {
+  local windows = GOOS == 'windows',
+  local archiveExt = if windows then 'zip' else 'tar.gz',
+  local filename = 'um-%s-%s-%s.%s' % [GOOS, GOARCH, '$(git describe --tags --always)', archiveExt],
+  local filepath = 'dist/%s' % filename,
+  local pkgname = '${DRONE_REPO_NAME}-build',
+
+  name: 'upload artifact',
+  image: 'golang:1.23',  // reuse golang:1.19 for curl
+  environment: {
+    DRONE_GITEA_SERVER: 'https://git.unlock-music.dev',
+    GITEA_API_KEY: { from_secret: 'GITEA_API_KEY' },
+  },
+  commands: [
+    'curl --fail --include --user "um-release-bot:$GITEA_API_KEY" ' +
+    '--upload-file "%s" ' % filepath +
+    '"$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/%s/${DRONE_BUILD_NUMBER}/%s"' % [pkgname, filename],
+    'sha256sum %s' % filepath,
+    'echo $DRONE_GITEA_SERVER/${DRONE_REPO_NAMESPACE}/-/packages/generic/%s/${DRONE_BUILD_NUMBER}' % pkgname,
+  ],
+};
+
+
+local PipelineBuild(GOOS, GOARCH, RUN_TEST) = {
+  name: 'build %s/%s' % [GOOS, GOARCH],
+  kind: 'pipeline',
+  type: 'docker',
+  steps: [
+           {
+             name: 'fetch tags',
+             image: 'alpine/git',
+             commands: ['git fetch --tags'],
+           },
+         ] +
+         (
+           if RUN_TEST then [{
+             name: 'go test',
+             image: 'golang:1.23',
+             environment: {
+               GOPROXY: 'https://goproxy.io,direct',
+             },
+             commands: ['go test -v ./...'],
+           }] else []
+         )
+         +
+         [
+           StepGoBuild(GOOS, GOARCH),
+           StepUploadArtifact(GOOS, GOARCH),
+         ],
+  trigger: {
+    event: ['push', 'pull_request'],
+  },
+};
+
+local PipelineRelease() = {
+  name: 'release',
+  kind: 'pipeline',
+  type: 'docker',
+  steps: [
+    {
+      name: 'fetch tags',
+      image: 'alpine/git',
+      commands: ['git fetch --tags'],
+    },
+    {
+      name: 'go test',
+      image: 'golang:1.23',
+      environment: {
+        GOPROXY: 'https://goproxy.io,direct',
+      },
+      commands: ['go test -v ./...'],
+    },
+    StepGoBuild('linux', 'amd64'),
+    StepGoBuild('linux', 'arm64'),
+    StepGoBuild('linux', '386'),
+    StepGoBuild('windows', 'amd64'),
+    StepGoBuild('windows', 'arm64'),
+    StepGoBuild('windows', '386'),
+    StepGoBuild('darwin', 'amd64'),
+    StepGoBuild('darwin', 'arm64'),
+    {
+      name: 'prepare root',
+      image: 'golang:1.23',
+      commands: [
+        'mv dist/*.tar.gz dist/*.zip ./',
+      ],
+    },
+    CreateRelease(),
+  ],
+  trigger: {
+    event: ['tag'],
+  },
+};
+
+[
+  PipelineBuild('linux', 'amd64', true),
+  PipelineBuild('windows', 'amd64', false),
+  PipelineBuild('darwin', 'amd64', false),
+  PipelineRelease(),
+]
--- a/.drone.yml
+++ b/.drone.yml
@ -0,0 +1,257 @@
+---
+kind: pipeline
+name: build linux/amd64
+steps:
+- commands:
+  - git fetch --tags
+  image: alpine/git
+  name: fetch tags
+- commands:
+  - go test -v ./...
+  environment:
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go test
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-amd64-$(git describe --tags
+    --always).tar.gz"
+  environment:
+    GOARCH: amd64
+    GOOS: linux
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build linux/amd64
+- commands:
+  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-linux-amd64-$(git
+    describe --tags --always).tar.gz" "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-linux-amd64-$(git
+    describe --tags --always).tar.gz"
+  - sha256sum dist/um-linux-amd64-$(git describe --tags --always).tar.gz
+  - echo $DRONE_GITEA_SERVER/${DRONE_REPO_NAMESPACE}/-/packages/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}
+  environment:
+    DRONE_GITEA_SERVER: https://git.unlock-music.dev
+    GITEA_API_KEY:
+      from_secret: GITEA_API_KEY
+  image: golang:1.23
+  name: upload artifact
+trigger:
+  event:
+  - push
+  - pull_request
+type: docker
+---
+kind: pipeline
+name: build windows/amd64
+steps:
+- commands:
+  - git fetch --tags
+  image: alpine/git
+  name: fetch tags
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-amd64-$(git describe --tags --always).zip" $DIST_DIR
+  environment:
+    GOARCH: amd64
+    GOOS: windows
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build windows/amd64
+- commands:
+  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-windows-amd64-$(git
+    describe --tags --always).zip" "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-windows-amd64-$(git
+    describe --tags --always).zip"
+  - sha256sum dist/um-windows-amd64-$(git describe --tags --always).zip
+  - echo $DRONE_GITEA_SERVER/${DRONE_REPO_NAMESPACE}/-/packages/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}
+  environment:
+    DRONE_GITEA_SERVER: https://git.unlock-music.dev
+    GITEA_API_KEY:
+      from_secret: GITEA_API_KEY
+  image: golang:1.23
+  name: upload artifact
+trigger:
+  event:
+  - push
+  - pull_request
+type: docker
+---
+kind: pipeline
+name: build darwin/amd64
+steps:
+- commands:
+  - git fetch --tags
+  image: alpine/git
+  name: fetch tags
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-darwin-amd64-$(git describe --tags
+    --always).tar.gz"
+  environment:
+    GOARCH: amd64
+    GOOS: darwin
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build darwin/amd64
+- commands:
+  - curl --fail --include --user "um-release-bot:$GITEA_API_KEY" --upload-file "dist/um-darwin-amd64-$(git
+    describe --tags --always).tar.gz" "$DRONE_GITEA_SERVER/api/packages/${DRONE_REPO_NAMESPACE}/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}/um-darwin-amd64-$(git
+    describe --tags --always).tar.gz"
+  - sha256sum dist/um-darwin-amd64-$(git describe --tags --always).tar.gz
+  - echo $DRONE_GITEA_SERVER/${DRONE_REPO_NAMESPACE}/-/packages/generic/${DRONE_REPO_NAME}-build/${DRONE_BUILD_NUMBER}
+  environment:
+    DRONE_GITEA_SERVER: https://git.unlock-music.dev
+    GITEA_API_KEY:
+      from_secret: GITEA_API_KEY
+  image: golang:1.23
+  name: upload artifact
+trigger:
+  event:
+  - push
+  - pull_request
+type: docker
+---
+kind: pipeline
+name: release
+steps:
+- commands:
+  - git fetch --tags
+  image: alpine/git
+  name: fetch tags
+- commands:
+  - go test -v ./...
+  environment:
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go test
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-amd64-$(git describe --tags
+    --always).tar.gz"
+  environment:
+    GOARCH: amd64
+    GOOS: linux
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build linux/amd64
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-arm64-$(git describe --tags
+    --always).tar.gz"
+  environment:
+    GOARCH: arm64
+    GOOS: linux
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build linux/arm64
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-linux-386-$(git describe --tags --always).tar.gz"
+  environment:
+    GOARCH: "386"
+    GOOS: linux
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build linux/386
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-amd64-$(git describe --tags --always).zip" $DIST_DIR
+  environment:
+    GOARCH: amd64
+    GOOS: windows
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build windows/amd64
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-arm64-$(git describe --tags --always).zip" $DIST_DIR
+  environment:
+    GOARCH: arm64
+    GOOS: windows
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build windows/arm64
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - command -v zip >/dev/null || (apt update && apt install -y zip)
+  - zip -9 -j -r "dist/um-windows-386-$(git describe --tags --always).zip" $DIST_DIR
+  environment:
+    GOARCH: "386"
+    GOOS: windows
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build windows/386
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-darwin-amd64-$(git describe --tags
+    --always).tar.gz"
+  environment:
+    GOARCH: amd64
+    GOOS: darwin
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build darwin/amd64
+- commands:
+  - DIST_DIR=$(mktemp -d)
+  - go build -v -trimpath -ldflags="-w -s -X main.AppVersion=$(git describe --tags
+    --always)" -o $DIST_DIR ./cmd/um
+  - mkdir -p dist
+  - tar -c -C $DIST_DIR um | gzip -9 > "dist/um-darwin-arm64-$(git describe --tags
+    --always).tar.gz"
+  environment:
+    GOARCH: arm64
+    GOOS: darwin
+    GOPROXY: https://goproxy.io,direct
+  image: golang:1.23
+  name: go build darwin/arm64
+- commands:
+  - mv dist/*.tar.gz dist/*.zip ./
+  image: golang:1.23
+  name: prepare root
+- image: plugins/gitea-release
+  name: create release
+  settings:
+    api_key:
+      from_secret: GITEA_API_KEY
+    base_url: https://git.unlock-music.dev
+    checksum: sha256
+    draft: true
+    files:
+    - um-*.tar.gz
+    - um-*.zip
+    title: ${DRONE_TAG}
+trigger:
+  event:
+  - tag
+type: docker
--- a/.gitignore
+++ b/.gitignore
@ -1,3 +1,7 @@
 .idea

 /dist
+*.exe
+
+/um-*.tar.gz
+/um-*.zip
--- a/README.md
+++ b/README.md
@ -1,25 +1,48 @@
 # Unlock Music Project - CLI Edition

-Original: Web Edition https://github.com/ix64/unlock-music
+Original: Web Edition https://git.unlock-music.dev/um/web

- [Release Download](https://github.com/unlock-music/cli/releases/latest)
+- [![Build Status](https://ci.unlock-music.dev/api/badges/um/cli/status.svg)](https://ci.unlock-music.dev/um/cli)
+- [Release Download](https://git.unlock-music.dev/um/cli/releases/latest)
+- [Latest Build](https://git.unlock-music.dev/um/-/packages/generic/cli-build/)
+
+> **WARNING**
+> 在本站 fork 不会起到备份的作用，只会浪费服务器储存空间。如无必要请勿 fork 该仓库。

 ## Features

- [x] All Algorithm Supported By `ix64/unlock-music`
- [ ] Complete Cover Image
- [ ] Parse Meta Data
- [ ] Complete Meta Data
+- [x] All Algorithm Supported By `unlock-music/web`
+- [x] Complete Metadata & Cover Image

-## Hou to Build
+## Release

- Requirements: **Golang 1.17**
+[Latest release](https://git.unlock-music.dev/um/cli/releases/latest).

-1. Clone this repo `git clone https://github.com/unlock-music/cli && cd cli`
-2. Build the executable `go build ./cmd/um`
+## Install from source
+
+- Requirements: **Golang 1.23.3**
+
+1. run `go install unlock-music.dev/cli/cmd/um@master`
+
+### Build from repo source
+
+1. Pull repo source.
+2. Build with `go build ./cmd/um`.
+
+It will produce `um` or `um.exe` (Windows).

 ## 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
+
+## Update CI pipeline
+
+1. Install [Drone CI binary](https://docs.drone.io/cli/install/)
+2. Edit `.drone.jsonnet`
+3. Update drone CI pipeline:
+
+   ```sh
+   drone jsonnet --format --stream
+   ```
--- a/algo/common/dispatch.go
+++ b/algo/common/dispatch.go
@ -4,28 +4,46 @@ import (
 	"io"
 	"path/filepath"
 	"strings"
+
+	"go.uber.org/zap"
 )

-type NewDecoderFunc func(rd io.ReadSeeker) Decoder
+type DecoderParams struct {
+	Reader    io.ReadSeeker // required
+	Extension string        // required, source extension, eg. ".mp3"

-type decoderItem struct {
+	FilePath string // optional, source file path
+
+	Logger *zap.Logger // required
+}
+type NewDecoderFunc func(p *DecoderParams) Decoder
+
+type DecoderFactory struct {
 	noop   bool
-	decoder NewDecoderFunc
+	Suffix string
+	Create NewDecoderFunc
 }

-var DecoderRegistry = make(map[string][]decoderItem)
+var DecoderRegistry []DecoderFactory

 func RegisterDecoder(ext string, noop bool, dispatchFunc NewDecoderFunc) {
-	DecoderRegistry[ext] = append(DecoderRegistry[ext],
-		decoderItem{noop: noop, decoder: dispatchFunc})
+	DecoderRegistry = append(DecoderRegistry,
+		DecoderFactory{noop: noop, Create: dispatchFunc, Suffix: "." + strings.TrimPrefix(ext, ".")})
 }
-func GetDecoder(filename string, skipNoop bool) (rs []NewDecoderFunc) {
-	ext := strings.ToLower(strings.TrimLeft(filepath.Ext(filename), "."))
-	for _, dec := range DecoderRegistry[ext] {
+
+func GetDecoder(filename string, skipNoop bool) []DecoderFactory {
+	var result []DecoderFactory
+	// Some extensions contains multiple dots, e.g. ".kgm.flac", hence iterate
+	//   all decoders for each extension.
+	name := strings.ToLower(filepath.Base(filename))
+	for _, dec := range DecoderRegistry {
+		if !strings.HasSuffix(name, dec.Suffix) {
+			continue
+		}
 		if skipNoop && dec.noop {
 			continue
 		}
-		rs = append(rs, dec.decoder)
+		result = append(result, dec)
 	}
-	return
+	return result
 }
--- a/algo/common/interface.go
+++ b/algo/common/interface.go
@ -5,6 +5,10 @@ import (
 	"io"
 )

+type StreamDecoder interface {
+	Decrypt(buf []byte, offset int)
+}
+
 type Decoder interface {
 	Validate() error
 	io.Reader
@ -14,12 +18,12 @@ type CoverImageGetter interface {
 	GetCoverImage(ctx context.Context) ([]byte, error)
 }

-type Meta interface {
+type AudioMeta interface {
 	GetArtists() []string
 	GetTitle() string
 	GetAlbum() string
 }

-type StreamDecoder interface {
-	Decrypt(buf []byte, offset int)
+type AudioMetaGetter interface {
+	GetAudioMeta(ctx context.Context) (AudioMeta, error)
 }
--- a/algo/common/meta.go
+++ b/algo/common/meta.go
@ -0,0 +1,50 @@
+package common
+
+import (
+	"path"
+	"strings"
+)
+
+type filenameMeta struct {
+	artists []string
+	title   string
+	album   string
+}
+
+func (f *filenameMeta) GetArtists() []string {
+	return f.artists
+}
+
+func (f *filenameMeta) GetTitle() string {
+	return f.title
+}
+
+func (f *filenameMeta) GetAlbum() string {
+	return f.album
+}
+
+func ParseFilenameMeta(filename string) (meta AudioMeta) {
+	partName := strings.TrimSuffix(filename, path.Ext(filename))
+	items := strings.Split(partName, "-")
+	ret := &filenameMeta{}
+
+	switch len(items) {
+	case 0:
+		// no-op
+	case 1:
+		ret.title = strings.TrimSpace(items[0])
+	default:
+		ret.title = strings.TrimSpace(items[len(items)-1])
+
+		for _, v := range items[:len(items)-1] {
+			artists := strings.FieldsFunc(v, func(r rune) bool {
+				return r == ',' || r == '_'
+			})
+			for _, artist := range artists {
+				ret.artists = append(ret.artists, strings.TrimSpace(artist))
+			}
+		}
+	}
+
+	return ret
+}
--- a/algo/common/meta_test.go
+++ b/algo/common/meta_test.go
@ -0,0 +1,38 @@
+package common
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestParseFilenameMeta(t *testing.T) {
+
+	tests := []struct {
+		name     string
+		wantMeta AudioMeta
+	}{
+		{
+			name:     "test1",
+			wantMeta: &filenameMeta{title: "test1"},
+		},
+		{
+			name:     "周杰伦 - 晴天.flac",
+			wantMeta: &filenameMeta{artists: []string{"周杰伦"}, title: "晴天"},
+		},
+		{
+			name:     "Alan Walker _ Iselin Solheim - Sing Me to Sleep.flac",
+			wantMeta: &filenameMeta{artists: []string{"Alan Walker", "Iselin Solheim"}, title: "Sing Me to Sleep"},
+		},
+		{
+			name:     "Christopher,Madcon - Limousine.flac",
+			wantMeta: &filenameMeta{artists: []string{"Christopher", "Madcon"}, title: "Limousine"},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if gotMeta := ParseFilenameMeta(tt.name); !reflect.DeepEqual(gotMeta, tt.wantMeta) {
+				t.Errorf("ParseFilenameMeta() = %v, want %v", gotMeta, tt.wantMeta)
+			}
+		})
+	}
+}
--- a/algo/common/raw.go
+++ b/algo/common/raw.go
@ -4,6 +4,8 @@ import (
 	"errors"
 	"fmt"
 	"io"
+
+	"unlock-music.dev/cli/internal/sniff"
 )

 type RawDecoder struct {
@ -12,8 +14,8 @@ type RawDecoder struct {
 	audioExt string
 }

-func NewRawDecoder(rd io.ReadSeeker) Decoder {
-	return &RawDecoder{rd: rd}
+func NewRawDecoder(p *DecoderParams) Decoder {
+	return &RawDecoder{rd: p.Reader}
 }

 func (d *RawDecoder) Validate() error {
@ -26,7 +28,7 @@ func (d *RawDecoder) Validate() error {
 	}

 	var ok bool
-	d.audioExt, ok = SniffAll(header)
+	d.audioExt, ok = sniff.AudioExtension(header)
 	if !ok {
 		return errors.New("raw: sniff audio type failed")
 	}
--- a/algo/common/sniff.go
+++ b/algo/common/sniff.go
@ -1,55 +0,0 @@
-package common
-
-import "bytes"
-
-type Sniffer func(header []byte) bool
-
-var snifferRegistry = map[string]Sniffer{
-	".mp3":  SnifferMP3,
-	".flac": SnifferFLAC,
-	".ogg":  SnifferOGG,
-	".m4a":  SnifferM4A,
-	".wav":  SnifferWAV,
-	".wma":  SnifferWMA,
-	".aac":  SnifferAAC,
-	".dff":  SnifferDFF,
-}
-
-func SniffAll(header []byte) (string, bool) {
-	for ext, sniffer := range snifferRegistry {
-		if sniffer(header) {
-			return ext, true
-		}
-	}
-	return "", false
-}
-
-func SnifferM4A(header []byte) bool {
-	return len(header) >= 8 && bytes.Equal([]byte("ftyp"), header[4:8])
-}
-
-func SnifferOGG(header []byte) bool {
-	return bytes.HasPrefix(header, []byte("OggS"))
-}
-
-func SnifferFLAC(header []byte) bool {
-	return bytes.HasPrefix(header, []byte("fLaC"))
-}
-func SnifferMP3(header []byte) bool {
-	return bytes.HasPrefix(header, []byte("ID3"))
-}
-func SnifferWAV(header []byte) bool {
-	return bytes.HasPrefix(header, []byte("RIFF"))
-}
-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})
-}
-
-// SnifferDFF sniff a DSDIFF format
-// reference to: https://www.sonicstudio.com/pdf/dsd/DSDIFF_1.5_Spec.pdf
-func SnifferDFF(header []byte) bool {
-	return bytes.HasPrefix(header, []byte("FRM8"))
-}
--- a/algo/kgm/kgm.go
+++ b/algo/kgm/kgm.go
@ -16,8 +16,8 @@ type Decoder struct {
 	header header
 }

-func NewDecoder(rd io.ReadSeeker) common.Decoder {
-	return &Decoder{rd: rd}
+func NewDecoder(p *common.DecoderParams) common.Decoder {
+	return &Decoder{rd: p.Reader}
 }

 // Validate checks if the file is a valid Kugou (.kgm, .vpr, .kgma) file.
@ -61,4 +61,7 @@ func init() {
 	common.RegisterDecoder("kgma", false, NewDecoder)
 	// Viper
 	common.RegisterDecoder("vpr", false, NewDecoder)
+	// Kugou Android
+	common.RegisterDecoder("kgm.flac", false, NewDecoder)
+	common.RegisterDecoder("vpr.flac", false, NewDecoder)
 }
--- a/algo/kwm/kwm.go
+++ b/algo/kwm/kwm.go
@ -30,8 +30,8 @@ func (d *Decoder) GetAudioExt() string {
 	return "." + d.outputExt
 }

-func NewDecoder(rd io.ReadSeeker) common.Decoder {
-	return &Decoder{rd: rd}
+func NewDecoder(p *common.DecoderParams) common.Decoder {
+	return &Decoder{rd: p.Reader}
 }

 // Validate checks if the file is a valid Kuwo .kw file.
--- a/algo/ncm/meta.go
+++ b/algo/ncm/meta.go
@ -1,26 +1,31 @@
 package ncm

 import (
+	"go.uber.org/zap"
 	"strings"

 	"unlock-music.dev/cli/algo/common"
 )

-type RawMeta interface {
-	common.Meta
+type ncmMeta interface {
+	common.AudioMeta
+
+	// GetFormat return the audio format, e.g. mp3, flac
 	GetFormat() string
+
+	// GetAlbumImageURL return the album image url
 	GetAlbumImageURL() string
 }
-type RawMetaMusic struct {
+
+type ncmMetaMusic struct {
+	logger *zap.Logger
+
 	Format        string        `json:"format"`
-	MusicID       int             `json:"musicId"`
 	MusicName     string        `json:"musicName"`
-	Artist        [][]interface{} `json:"artist"`
+	Artist        interface{}   `json:"artist"`
 	Album         string        `json:"album"`
-	AlbumID       int             `json:"albumId"`
 	AlbumPicDocID interface{}   `json:"albumPicDocId"`
 	AlbumPic      string        `json:"albumPic"`
-	MvID          int             `json:"mvId"`
 	Flag          int           `json:"flag"`
 	Bitrate       int           `json:"bitrate"`
 	Duration      int           `json:"duration"`
@ -28,37 +33,53 @@ type RawMetaMusic struct {
 	TransNames    []interface{} `json:"transNames"`
 }

-func (m RawMetaMusic) GetAlbumImageURL() string {
+func newNcmMetaMusic(logger *zap.Logger) *ncmMetaMusic {
+	ncm := new(ncmMetaMusic)
+	ncm.logger = logger.With(zap.String("module", "ncmMetaMusic"))
+	return ncm
+}
+
+func (m *ncmMetaMusic) GetAlbumImageURL() string {
 	return m.AlbumPic
 }
-func (m RawMetaMusic) GetArtists() (artists []string) {
-	for _, artist := range m.Artist {
-		for _, item := range artist {
-			name, ok := item.(string)
-			if ok {
+
+func (m *ncmMetaMusic) GetArtists() []string {
+	m.logger.Debug("ncm artists", zap.Any("artists", m.Artist))
+
+	var artists []string = nil
+	if jsonArtists, ok := m.Artist.([][]string); ok {
+		for _, artist := range jsonArtists {
+			for _, name := range artist {
 				artists = append(artists, name)
 			}
 		}
+	} else if artist, ok := m.Artist.(string); ok {
+		// #78: artist is a string type.
+		// https://git.unlock-music.dev/um/cli/issues/78
+		artists = []string{artist}
+	} else {
+		m.logger.Warn("unexpected artist type", zap.Any("artists", m.Artist))
 	}
-	return
+	return artists
 }

-func (m RawMetaMusic) GetTitle() string {
+func (m *ncmMetaMusic) GetTitle() string {
 	return m.MusicName
 }

-func (m RawMetaMusic) GetAlbum() string {
+func (m *ncmMetaMusic) GetAlbum() string {
 	return m.Album
 }
-func (m RawMetaMusic) GetFormat() string {
+
+func (m *ncmMetaMusic) GetFormat() string {
 	return m.Format
 }

 //goland:noinspection SpellCheckingInspection
-type RawMetaDJ struct {
+type ncmMetaDJ struct {
 	ProgramID          int          `json:"programId"`
 	ProgramName        string       `json:"programName"`
-	MainMusic          RawMetaMusic `json:"mainMusic"`
+	MainMusic          ncmMetaMusic `json:"mainMusic"`
 	DjID               int          `json:"djId"`
 	DjName             string       `json:"djName"`
 	DjAvatarURL        string       `json:"djAvatarUrl"`
@ -80,32 +101,32 @@ type RawMetaDJ struct {
 	RadioPurchaseCount int          `json:"radioPurchaseCount"`
 }

-func (m RawMetaDJ) GetArtists() []string {
+func (m *ncmMetaDJ) GetArtists() []string {
 	if m.DjName != "" {
 		return []string{m.DjName}
 	}
 	return m.MainMusic.GetArtists()
 }

-func (m RawMetaDJ) GetTitle() string {
+func (m *ncmMetaDJ) GetTitle() string {
 	if m.ProgramName != "" {
 		return m.ProgramName
 	}
 	return m.MainMusic.GetTitle()
 }

-func (m RawMetaDJ) GetAlbum() string {
+func (m *ncmMetaDJ) GetAlbum() string {
 	if m.Brand != "" {
 		return m.Brand
 	}
 	return m.MainMusic.GetAlbum()
 }

-func (m RawMetaDJ) GetFormat() string {
+func (m *ncmMetaDJ) GetFormat() string {
 	return m.MainMusic.GetFormat()
 }

-func (m RawMetaDJ) GetAlbumImageURL() string {
+func (m *ncmMetaDJ) GetAlbumImageURL() string {
 	if strings.HasPrefix(m.MainMusic.GetAlbumImageURL(), "http") {
 		return m.MainMusic.GetAlbumImageURL()
 	}
--- a/algo/ncm/ncm.go
+++ b/algo/ncm/ncm.go
@ -8,6 +8,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"go.uber.org/zap"
 	"io"
 	"net/http"
 	"strings"
@ -29,13 +30,12 @@ var (
 	}
 )

-func NewDecoder(rd io.ReadSeeker) common.Decoder {
-	return &Decoder{
-		rd: rd,
-	}
+func NewDecoder(p *common.DecoderParams) common.Decoder {
+	return &Decoder{rd: p.Reader, logger: p.Logger.With(zap.String("module", "ncm"))}
 }

 type Decoder struct {
+	logger *zap.Logger
 	rd     io.ReadSeeker // rd is the original file reader

 	offset int
@ -43,7 +43,7 @@ type Decoder struct {

 	metaRaw  []byte
 	metaType string
-	meta     RawMeta
+	meta     ncmMeta
 	cover    []byte
 }

@ -76,7 +76,7 @@ func (d *Decoder) Validate() error {
 	}

 	if err := d.parseMeta(); err != nil {
-		return fmt.Errorf("parse meta failed: %w", err)
+		return fmt.Errorf("parse meta failed: %w (raw json=%s)", err, string(d.metaRaw))
 	}

 	d.cipher = newNcmCipher(keyData)
@ -151,12 +151,18 @@ func (d *Decoder) readMetaData() error {
 }

 func (d *Decoder) readCoverData() error {
-	bCoverCRC := make([]byte, 4)
-	if _, err := io.ReadFull(d.rd, bCoverCRC); err != nil {
-		return fmt.Errorf("ncm read cover crc: %w", err)
+	bCoverFrameLen := make([]byte, 4)
+	if _, err := io.ReadFull(d.rd, bCoverFrameLen); err != nil {
+		return fmt.Errorf("ncm read cover length: %w", err)
 	}

-	bCoverLen := make([]byte, 4) //
+	coverFrameStartOffset, err := d.rd.Seek(0, io.SeekCurrent)
+	if err != nil {
+		return fmt.Errorf("ncm fetch cover frame start offset: %w", err)
+	}
+	coverFrameLen := binary.LittleEndian.Uint32(bCoverFrameLen)
+
+	bCoverLen := make([]byte, 4)
 	if _, err := io.ReadFull(d.rd, bCoverLen); err != nil {
 		return fmt.Errorf("ncm read cover length: %w", err)
 	}
@ -168,16 +174,19 @@ func (d *Decoder) readCoverData() error {
 	}
 	d.cover = coverBuf

-	return nil
+	offsetAudioData := coverFrameStartOffset + int64(coverFrameLen) + 4
+	_, err = d.rd.Seek(offsetAudioData, io.SeekStart)
+
+	return err
 }

 func (d *Decoder) parseMeta() error {
 	switch d.metaType {
 	case "music":
-		d.meta = new(RawMetaMusic)
+		d.meta = newNcmMetaMusic(d.logger)
 		return json.Unmarshal(d.metaRaw, d.meta)
 	case "dj":
-		d.meta = new(RawMetaDJ)
+		d.meta = new(ncmMetaDJ)
 		return json.Unmarshal(d.metaRaw, d.meta)
 	default:
 		return errors.New("unknown ncm meta type: " + d.metaType)
@ -206,8 +215,12 @@ func (d *Decoder) GetCoverImage(ctx context.Context) ([]byte, error) {
 	if d.cover != nil {
 		return d.cover, nil
 	}
+
+	if d.meta == nil {
+		return nil, errors.New("ncm meta not found")
+	}
 	imgURL := d.meta.GetAlbumImageURL()
-	if d.meta != nil && !strings.HasPrefix(imgURL, "http") {
+	if !strings.HasPrefix(imgURL, "http") {
 		return nil, nil // no cover image
 	}

@ -215,22 +228,23 @@ func (d *Decoder) GetCoverImage(ctx context.Context) ([]byte, error) {
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, imgURL, nil)
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return nil, fmt.Errorf("download image failed: %w", err)
+		return nil, fmt.Errorf("ncm download image failed: %w", err)
 	}
 	defer resp.Body.Close()

 	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("download image failed: unexpected http status %s", resp.Status)
+		return nil, fmt.Errorf("ncm download image failed: unexpected http status %s", resp.Status)
 	}
-	data, err := io.ReadAll(resp.Body)
+	d.cover, err = io.ReadAll(resp.Body)
 	if err != nil {
-		return nil, fmt.Errorf("download image failed: %w", err)
+		return nil, fmt.Errorf("ncm download image failed: %w", err)
 	}
-	return data, nil
+
+	return d.cover, nil
 }

-func (d *Decoder) GetMeta() common.Meta {
-	return d.meta
+func (d *Decoder) GetAudioMeta(_ context.Context) (common.AudioMeta, error) {
+	return d.meta, nil
 }

 func init() {
--- a/algo/qmc/client/base.go
+++ b/algo/qmc/client/base.go
@ -0,0 +1,146 @@
+package client
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+type QQMusic struct {
+	http *http.Client
+}
+
+func (c *QQMusic) rpcDoRequest(ctx context.Context, reqBody any) ([]byte, error) {
+	reqBodyBuf, err := json.Marshal(reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcDoRequest] marshal request: %w", err)
+	}
+
+	const endpointURL = "https://u.y.qq.com/cgi-bin/musicu.fcg"
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost,
+		endpointURL+fmt.Sprintf("?pcachetime=%d", time.Now().Unix()),
+		bytes.NewReader(reqBodyBuf),
+	)
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcDoRequest] create request: %w", err)
+	}
+
+	req.Header.Set("Accept", "*/*")
+	req.Header.Set("Accept-Language", "zh-CN")
+	req.Header.Set("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)")
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	// req.Header.Set("Accept-Encoding", "gzip, deflate")
+
+	reqp, err := c.http.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcDoRequest] send request: %w", err)
+	}
+	defer reqp.Body.Close()
+
+	respBodyBuf, err := io.ReadAll(reqp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcDoRequest] read response: %w", err)
+	}
+
+	return respBodyBuf, nil
+}
+
+type rpcRequest struct {
+	Method string `json:"method"`
+	Module string `json:"module"`
+	Param  any    `json:"param"`
+}
+
+type rpcResponse struct {
+	Code    int    `json:"code"`
+	Ts      int64  `json:"ts"`
+	StartTs int64  `json:"start_ts"`
+	TraceID string `json:"traceid"`
+}
+
+type rpcSubResponse struct {
+	Code int             `json:"code"`
+	Data json.RawMessage `json:"data"`
+}
+
+func (c *QQMusic) rpcCall(ctx context.Context,
+	protocol string, method string, module string,
+	param any,
+) (json.RawMessage, error) {
+	reqBody := map[string]any{protocol: rpcRequest{
+		Method: method,
+		Module: module,
+		Param:  param,
+	}}
+
+	respBodyBuf, err := c.rpcDoRequest(ctx, reqBody)
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcCall] do request: %w", err)
+	}
+
+	// check rpc response status
+	respStatus := rpcResponse{}
+	if err := json.Unmarshal(respBodyBuf, &respStatus); err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcCall] unmarshal response: %w", err)
+	}
+	if respStatus.Code != 0 {
+		return nil, fmt.Errorf("qqMusicClient[rpcCall] rpc error: %d", respStatus.Code)
+	}
+
+	// parse response data
+	var respBody map[string]json.RawMessage
+	if err := json.Unmarshal(respBodyBuf, &respBody); err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcCall] unmarshal response: %w", err)
+	}
+
+	subRespBuf, ok := respBody[protocol]
+	if !ok {
+		return nil, fmt.Errorf("qqMusicClient[rpcCall] sub-response not found")
+	}
+
+	subResp := rpcSubResponse{}
+	if err := json.Unmarshal(subRespBuf, &subResp); err != nil {
+		return nil, fmt.Errorf("qqMusicClient[rpcCall] unmarshal sub-response: %w", err)
+	}
+
+	if subResp.Code != 0 {
+		return nil, fmt.Errorf("qqMusicClient[rpcCall] sub-response error: %d", subResp.Code)
+	}
+
+	return subResp.Data, nil
+}
+
+func (c *QQMusic) downloadFile(ctx context.Context, url string) ([]byte, error) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+	if err != nil {
+		return nil, fmt.Errorf("qmc[downloadFile] init request: %w", err)
+	}
+
+	//req.Header.Set("Accept", "image/webp,image/*,*/*;q=0.8") // jpeg is preferred to embed in audio
+	req.Header.Set("Accept-Language", "zh-CN,zh;q=0.8,en-US;q=0.6,en;q=0.5;q=0.4")
+	req.Header.Set("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.47.134 Safari/537.36 QBCore/3.53.47.400 QQBrowser/9.0.2524.400")
+
+	resp, err := c.http.Do(req)
+	if err != nil {
+		return nil, fmt.Errorf("qmc[downloadFile] send request: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("qmc[downloadFile] unexpected http status %s", resp.Status)
+	}
+
+	return io.ReadAll(resp.Body)
+}
+
+func NewQQMusicClient() *QQMusic {
+	return &QQMusic{
+		http: &http.Client{
+			Timeout: 10 * time.Second,
+		},
+	}
+}
--- a/algo/qmc/client/cover.go
+++ b/algo/qmc/client/cover.go
@ -0,0 +1,21 @@
+package client
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+)
+
+func (c *QQMusic) AlbumCoverByID(ctx context.Context, albumID int) ([]byte, error) {
+	u := fmt.Sprintf("https://imgcache.qq.com/music/photo/album/%s/albumpic_%s_0.jpg",
+		strconv.Itoa(albumID%100),
+		strconv.Itoa(albumID),
+	)
+	return c.downloadFile(ctx, u)
+}
+
+func (c *QQMusic) AlbumCoverByMediaID(ctx context.Context, mediaID string) ([]byte, error) {
+	// original: https://y.gtimg.cn/music/photo_new/T002M000%s.jpg
+	u := fmt.Sprintf("https://y.gtimg.cn/music/photo_new/T002R500x500M000%s.jpg", mediaID)
+	return c.downloadFile(ctx, u)
+}
--- a/algo/qmc/client/search.go
+++ b/algo/qmc/client/search.go
@ -0,0 +1,52 @@
+package client
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+)
+
+type searchParams struct {
+	Grp         int    `json:"grp"`
+	NumPerPage  int    `json:"num_per_page"`
+	PageNum     int    `json:"page_num"`
+	Query       string `json:"query"`
+	RemotePlace string `json:"remoteplace"`
+	SearchType  int    `json:"search_type"`
+	//SearchID    string `json:"searchid"` // todo: it seems generated randomly
+}
+
+type searchResponse struct {
+	Body struct {
+		Song struct {
+			List []*TrackInfo `json:"list"`
+		} `json:"song"`
+	} `json:"body"`
+	Code int `json:"code"`
+}
+
+func (c *QQMusic) Search(ctx context.Context, keyword string) ([]*TrackInfo, error) {
+
+	resp, err := c.rpcCall(ctx,
+		"music.search.SearchCgiService",
+		"DoSearchForQQMusicDesktop",
+		"music.search.SearchCgiService",
+		&searchParams{
+			SearchType: 0, Query: keyword,
+			PageNum: 1, NumPerPage: 40,
+
+			// static values
+			Grp: 1, RemotePlace: "sizer.newclient.song",
+		})
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[Search] rpc call: %w", err)
+	}
+
+	respData := searchResponse{}
+	if err := json.Unmarshal(resp, &respData); err != nil {
+		return nil, fmt.Errorf("qqMusicClient[Search] unmarshal response: %w", err)
+	}
+
+	return respData.Body.Song.List, nil
+
+}
--- a/algo/qmc/client/track.go
+++ b/algo/qmc/client/track.go
@ -0,0 +1,178 @@
+package client
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/samber/lo"
+)
+
+type getTrackInfoParams struct {
+	Ctx   int   `json:"ctx"`
+	Ids   []int `json:"ids"`
+	Types []int `json:"types"`
+}
+
+type getTrackInfoResponse struct {
+	Tracks []*TrackInfo `json:"tracks"`
+}
+
+func (c *QQMusic) GetTracksInfo(ctx context.Context, songIDs []int) ([]*TrackInfo, error) {
+	resp, err := c.rpcCall(ctx,
+		"Protocol_UpdateSongInfo",
+		"CgiGetTrackInfo",
+		"music.trackInfo.UniformRuleCtrl",
+		&getTrackInfoParams{Ctx: 0, Ids: songIDs, Types: []int{0}},
+	)
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[GetTrackInfo] rpc call: %w", err)
+	}
+	respData := getTrackInfoResponse{}
+	if err := json.Unmarshal(resp, &respData); err != nil {
+		return nil, fmt.Errorf("qqMusicClient[GetTrackInfo] unmarshal response: %w", err)
+	}
+
+	return respData.Tracks, nil
+}
+
+func (c *QQMusic) GetTrackInfo(ctx context.Context, songID int) (*TrackInfo, error) {
+	tracks, err := c.GetTracksInfo(ctx, []int{songID})
+	if err != nil {
+		return nil, fmt.Errorf("qqMusicClient[GetTrackInfo] get tracks info: %w", err)
+	}
+
+	if len(tracks) == 0 {
+		return nil, fmt.Errorf("qqMusicClient[GetTrackInfo] track not found")
+	}
+
+	return tracks[0], nil
+}
+
+type TrackSinger struct {
+	Id    int    `json:"id"`
+	Mid   string `json:"mid"`
+	Name  string `json:"name"`
+	Title string `json:"title"`
+	Type  int    `json:"type"`
+	Uin   int    `json:"uin"`
+	Pmid  string `json:"pmid"`
+}
+type TrackAlbum struct {
+	Id       int    `json:"id"`
+	Mid      string `json:"mid"`
+	Name     string `json:"name"`
+	Title    string `json:"title"`
+	Subtitle string `json:"subtitle"`
+	Pmid     string `json:"pmid"`
+}
+type TrackInfo struct {
+	Id       int           `json:"id"`
+	Type     int           `json:"type"`
+	Mid      string        `json:"mid"`
+	Name     string        `json:"name"`
+	Title    string        `json:"title"`
+	Subtitle string        `json:"subtitle"`
+	Singer   []TrackSinger `json:"singer"`
+	Album    TrackAlbum    `json:"album"`
+	Mv       struct {
+		Id    int    `json:"id"`
+		Vid   string `json:"vid"`
+		Name  string `json:"name"`
+		Title string `json:"title"`
+		Vt    int    `json:"vt"`
+	} `json:"mv"`
+	Interval   int    `json:"interval"`
+	Isonly     int    `json:"isonly"`
+	Language   int    `json:"language"`
+	Genre      int    `json:"genre"`
+	IndexCd    int    `json:"index_cd"`
+	IndexAlbum int    `json:"index_album"`
+	TimePublic string `json:"time_public"`
+	Status     int    `json:"status"`
+	Fnote      int    `json:"fnote"`
+	File       struct {
+		MediaMid      string        `json:"media_mid"`
+		Size24Aac     int           `json:"size_24aac"`
+		Size48Aac     int           `json:"size_48aac"`
+		Size96Aac     int           `json:"size_96aac"`
+		Size192Ogg    int           `json:"size_192ogg"`
+		Size192Aac    int           `json:"size_192aac"`
+		Size128Mp3    int           `json:"size_128mp3"`
+		Size320Mp3    int           `json:"size_320mp3"`
+		SizeApe       int           `json:"size_ape"`
+		SizeFlac      int           `json:"size_flac"`
+		SizeDts       int           `json:"size_dts"`
+		SizeTry       int           `json:"size_try"`
+		TryBegin      int           `json:"try_begin"`
+		TryEnd        int           `json:"try_end"`
+		Url           string        `json:"url"`
+		SizeHires     int           `json:"size_hires"`
+		HiresSample   int           `json:"hires_sample"`
+		HiresBitdepth int           `json:"hires_bitdepth"`
+		B30S          int           `json:"b_30s"`
+		E30S          int           `json:"e_30s"`
+		Size96Ogg     int           `json:"size_96ogg"`
+		Size360Ra     []interface{} `json:"size_360ra"`
+		SizeDolby     int           `json:"size_dolby"`
+		SizeNew       []interface{} `json:"size_new"`
+	} `json:"file"`
+	Pay struct {
+		PayMonth   int `json:"pay_month"`
+		PriceTrack int `json:"price_track"`
+		PriceAlbum int `json:"price_album"`
+		PayPlay    int `json:"pay_play"`
+		PayDown    int `json:"pay_down"`
+		PayStatus  int `json:"pay_status"`
+		TimeFree   int `json:"time_free"`
+	} `json:"pay"`
+	Action struct {
+		Switch   int `json:"switch"`
+		Msgid    int `json:"msgid"`
+		Alert    int `json:"alert"`
+		Icons    int `json:"icons"`
+		Msgshare int `json:"msgshare"`
+		Msgfav   int `json:"msgfav"`
+		Msgdown  int `json:"msgdown"`
+		Msgpay   int `json:"msgpay"`
+		Switch2  int `json:"switch2"`
+		Icon2    int `json:"icon2"`
+	} `json:"action"`
+	Ksong struct {
+		Id  int    `json:"id"`
+		Mid string `json:"mid"`
+	} `json:"ksong"`
+	Volume struct {
+		Gain float64 `json:"gain"`
+		Peak float64 `json:"peak"`
+		Lra  float64 `json:"lra"`
+	} `json:"volume"`
+	Label       string   `json:"label"`
+	Url         string   `json:"url"`
+	Ppurl       string   `json:"ppurl"`
+	Bpm         int      `json:"bpm"`
+	Version     int      `json:"version"`
+	Trace       string   `json:"trace"`
+	DataType    int      `json:"data_type"`
+	ModifyStamp int      `json:"modify_stamp"`
+	Aid         int      `json:"aid"`
+	Tid         int      `json:"tid"`
+	Ov          int      `json:"ov"`
+	Sa          int      `json:"sa"`
+	Es          string   `json:"es"`
+	Vs          []string `json:"vs"`
+}
+
+func (t *TrackInfo) GetArtists() []string {
+	return lo.Map(t.Singer, func(v TrackSinger, i int) string {
+		return v.Name
+	})
+}
+
+func (t *TrackInfo) GetTitle() string {
+	return t.Title
+}
+
+func (t *TrackInfo) GetAlbum() string {
+	return t.Album.Name
+}
--- a/algo/qmc/key_mmkv.go
+++ b/algo/qmc/key_mmkv.go
@ -0,0 +1,158 @@
+package qmc
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	"github.com/samber/lo"
+	"go.uber.org/zap"
+	"golang.org/x/exp/slices"
+	"golang.org/x/text/unicode/norm"
+	"unlock-music.dev/mmkv"
+)
+
+var streamKeyVault mmkv.Vault
+
+// TODO: move to factory
+func readKeyFromMMKV(file string, logger *zap.Logger) ([]byte, error) {
+	if file == "" {
+		return nil, errors.New("file path is required while reading key from mmkv")
+	}
+
+	//goland:noinspection GoBoolExpressions
+	if runtime.GOOS != "darwin" {
+		return nil, errors.New("mmkv vault not supported on this platform")
+	}
+
+	if streamKeyVault == nil {
+		mmkvDir, err := getRelativeMMKVDir(file)
+		if err != nil {
+			mmkvDir, err = getDefaultMMKVDir()
+			if err != nil {
+				return nil, fmt.Errorf("mmkv key valut not found: %w", err)
+			}
+		}
+
+		mgr, err := mmkv.NewManager(mmkvDir)
+		if err != nil {
+			return nil, fmt.Errorf("init mmkv manager: %w", err)
+		}
+
+		streamKeyVault, err = mgr.OpenVault("MMKVStreamEncryptId")
+		if err != nil {
+			return nil, fmt.Errorf("open mmkv vault: %w", err)
+		}
+
+		logger.Debug("mmkv vault opened", zap.Strings("keys", streamKeyVault.Keys()))
+	}
+
+	_, partName := filepath.Split(file)
+	partName = normalizeUnicode(partName)
+
+	buf, err := streamKeyVault.GetBytes(file)
+	if buf == nil {
+		filePaths := streamKeyVault.Keys()
+		fileNames := lo.Map(filePaths, func(filePath string, _ int) string {
+			_, name := filepath.Split(filePath)
+			return normalizeUnicode(name)
+		})
+
+		for _, key := range fileNames { // fallback: match filename only
+			if key != partName {
+				continue
+			}
+			idx := slices.Index(fileNames, key)
+			buf, err = streamKeyVault.GetBytes(filePaths[idx])
+			if err != nil {
+				logger.Warn("read key from mmkv", zap.String("key", filePaths[idx]), zap.Error(err))
+			}
+		}
+
+	}
+
+	if len(buf) == 0 {
+		return nil, errors.New("key not found in mmkv vault")
+	}
+
+	return deriveKey(buf)
+}
+
+func OpenMMKV(mmkvPath string, key string, logger *zap.Logger) error {
+	filePath, fileName := filepath.Split(mmkvPath)
+	mgr, err := mmkv.NewManager(filepath.Dir(filePath))
+	if err != nil {
+		return fmt.Errorf("init mmkv manager: %w", err)
+	}
+
+	// If `vaultKey` is empty, the key is ignored.
+	streamKeyVault, err = mgr.OpenVaultCrypto(fileName, key)
+
+	if err != nil {
+		return fmt.Errorf("open mmkv vault: %w", err)
+	}
+
+	logger.Debug("mmkv vault opened", zap.Strings("keys", streamKeyVault.Keys()))
+	return nil
+}
+
+// /
+func readKeyFromMMKVCustom(mid string) ([]byte, error) {
+	if streamKeyVault == nil {
+		return nil, fmt.Errorf("mmkv vault not loaded")
+	}
+
+	// get ekey from mmkv vault
+	eKey, err := streamKeyVault.GetBytes(mid)
+	if err != nil {
+		return nil, fmt.Errorf("get eKey error: %w", err)
+	}
+	return deriveKey(eKey)
+}
+
+// / getRelativeMMKVDir get mmkv dir relative to file (legacy QQMusic for macOS behaviour)
+func getRelativeMMKVDir(file string) (string, error) {
+	mmkvDir := filepath.Join(filepath.Dir(file), "../mmkv")
+	if _, err := os.Stat(mmkvDir); err != nil {
+		return "", fmt.Errorf("stat default mmkv dir: %w", err)
+	}
+
+	keyFile := filepath.Join(mmkvDir, "MMKVStreamEncryptId")
+	if _, err := os.Stat(keyFile); err != nil {
+		return "", fmt.Errorf("stat default mmkv file: %w", err)
+	}
+
+	return mmkvDir, nil
+}
+
+func getDefaultMMKVDir() (string, error) {
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return "", fmt.Errorf("get user home dir: %w", err)
+	}
+
+	mmkvDir := filepath.Join(
+		homeDir,
+		"Library/Containers/com.tencent.QQMusicMac/Data",
+		"Library/Application Support/QQMusicMac/mmkv",
+	)
+	if _, err := os.Stat(mmkvDir); err != nil {
+		return "", fmt.Errorf("stat default mmkv dir: %w", err)
+	}
+
+	keyFile := filepath.Join(mmkvDir, "MMKVStreamEncryptId")
+	if _, err := os.Stat(keyFile); err != nil {
+		return "", fmt.Errorf("stat default mmkv file: %w", err)
+	}
+
+	return mmkvDir, nil
+}
+
+// normalizeUnicode normalizes unicode string to NFC.
+// since macOS may change some characters in the file name.
+// e.g. "ぜ"(e3 81 9c) -> "ぜ"(e3 81 9b e3 82 99)
+func normalizeUnicode(str string) string {
+	return norm.NFC.String(str)
+}
--- a/algo/qmc/qmc.go
+++ b/algo/qmc/qmc.go
@ -5,15 +5,19 @@ import (
 	"encoding/binary"
 	"errors"
 	"fmt"
+	"go.uber.org/zap"
 	"io"
+	"runtime"
 	"strconv"
 	"strings"

 	"unlock-music.dev/cli/algo/common"
+	"unlock-music.dev/cli/internal/sniff"
 )

 type Decoder struct {
 	raw    io.ReadSeeker // raw is the original file reader
+	params *common.DecoderParams

 	audio    io.Reader // audio is the encrypted audio data
 	audioLen int       // audioLen is the audio data length
@ -22,8 +26,20 @@ type Decoder struct {
 	decodedKey []byte // decodedKey is the decoded key for cipher
 	cipher     common.StreamDecoder

-	rawMetaExtra1 int
+	songID        int
 	rawMetaExtra2 int
+
+	albumID      int
+	albumMediaID string
+
+	// cache
+	meta          common.AudioMeta
+	cover         []byte
+	embeddedCover bool          // embeddedCover is true if the cover is embedded in the file
+	probeBuf      *bytes.Buffer // probeBuf is the buffer for sniffing metadata, TODO: consider pipe?
+
+	// provider
+	logger *zap.Logger
 }

 // Read implements io.Reader, offer the decrypted audio data.
@ -33,12 +49,14 @@ func (d *Decoder) Read(p []byte) (int, error) {
 	if n > 0 {
 		d.cipher.Decrypt(p[:n], d.offset)
 		d.offset += n
+
+		_, _ = d.probeBuf.Write(p[:n]) // bytes.Buffer.Write never return error
 	}
 	return n, err
 }

-func NewDecoder(r io.ReadSeeker) common.Decoder {
-	return &Decoder{raw: r}
+func NewDecoder(p *common.DecoderParams) common.Decoder {
+	return &Decoder{raw: p.Reader, params: p, logger: p.Logger}
 }

 func (d *Decoder) Validate() error {
@ -74,6 +92,9 @@ func (d *Decoder) Validate() error {
 	}
 	d.audio = io.LimitReader(d.raw, int64(d.audioLen))

+	// prepare for sniffing metadata
+	d.probeBuf = bytes.NewBuffer(make([]byte, 0, d.audioLen))
+
 	return nil
 }

@ -83,24 +104,35 @@ func (d *Decoder) validateDecode() error {
 		return fmt.Errorf("qmc seek to start: %w", err)
 	}

-	buf := make([]byte, 16)
+	buf := make([]byte, 64)
 	if _, err := io.ReadFull(d.raw, buf); err != nil {
 		return fmt.Errorf("qmc read header: %w", err)
 	}

 	d.cipher.Decrypt(buf, 0)
-	_, ok := common.SniffAll(buf)
+	_, ok := sniff.AudioExtension(buf)
 	if !ok {
 		return errors.New("qmc: detect file type failed")
 	}
 	return nil
 }

-func (d *Decoder) searchKey() error {
+func (d *Decoder) searchKey() (err error) {
 	fileSizeM4, err := d.raw.Seek(-4, io.SeekEnd)
 	if err != nil {
 		return err
 	}
+	fileSize := int(fileSizeM4) + 4
+
+	//goland:noinspection GoBoolExpressions
+	if runtime.GOOS == "darwin" && !strings.HasPrefix(d.params.Extension, ".qmc") {
+		d.decodedKey, err = readKeyFromMMKV(d.params.FilePath, d.logger)
+		if err == nil {
+			d.audioLen = fileSize
+			return
+		}
+		d.logger.Warn("read key from mmkv failed", zap.Error(err))
+	}

 	suffixBuf := make([]byte, 4)
 	if _, err := io.ReadFull(d.raw, suffixBuf); err != nil {
@ -112,6 +144,17 @@ func (d *Decoder) searchKey() error {
 		return d.readRawMetaQTag()
 	case "STag":
 		return errors.New("qmc: file with 'STag' suffix doesn't contains media key")
+	case "cex\x00":
+		footer, err := NewMusicExTag(d.raw)
+		if err != nil {
+			return err
+		}
+		d.audioLen = fileSize - int(footer.TagSize)
+		d.decodedKey, err = readKeyFromMMKVCustom(footer.MediaFileName)
+		if err != nil {
+			return err
+		}
+		return nil
 	default:
 		size := binary.LittleEndian.Uint32(suffixBuf)

@ -120,7 +163,7 @@ func (d *Decoder) searchKey() error {
 		}

 		// try to use default static cipher
-		d.audioLen = int(fileSizeM4 + 4)
+		d.audioLen = fileSize
 		return nil
 	}

@ -181,7 +224,7 @@ func (d *Decoder) readRawMetaQTag() error {
 		return err
 	}

-	d.rawMetaExtra1, err = strconv.Atoi(items[1])
+	d.songID, err = strconv.Atoi(items[1])
 	if err != nil {
 		return err
 	}
@ -211,10 +254,20 @@ func init() {
 		"6d3461",   //QQ Music Weiyun M4a
 		"776176",   //QQ Music Weiyun Wav

-		"mgg", "mgg1", "mggl", //QQ Music New Ogg
-		"mflac", "mflac0", //QQ Music New Flac
+		"mmp4", // QQ Music MP4 Container, tipically used for Dolby EAC3 stream
 	}
 	for _, ext := range supportedExts {
 		common.RegisterDecoder(ext, false, NewDecoder)
 	}
+
+	// New ogg/flac:
+	extraExtsCanHaveSuffix := []string{"mgg", "mflac"}
+	// Mac also adds some extra suffix to ext:
+	extraExtSuffix := []string{"0", "1", "a", "h", "l"}
+	for _, ext := range extraExtsCanHaveSuffix {
+		common.RegisterDecoder(ext, false, NewDecoder)
+		for _, suffix := range extraExtSuffix {
+			common.RegisterDecoder(ext+suffix, false, NewDecoder)
+		}
+	}
 }
--- a/algo/qmc/qmc_footer_musicex.go
+++ b/algo/qmc/qmc_footer_musicex.go
@ -0,0 +1,93 @@
+package qmc
+
+import (
+	bytes "bytes"
+	"encoding/binary"
+	"errors"
+	"fmt"
+	"io"
+	"strings"
+)
+
+type MusicExTagV1 struct {
+	SongID        uint32 // Song ID
+	Unknown1      uint32 // unused & unknown
+	Unknown2      uint32 // unused & unknown
+	MediaID       string // Media ID
+	MediaFileName string // real file name
+	Unknown3      uint32 // unused; uninitialized memory?
+
+	// 16 byte at the end of tag.
+	// TagSize should be respected when parsing.
+	TagSize    uint32 // 19.57: fixed value: 0xC0
+	TagVersion uint32 // 19.57: fixed value: 0x01
+	TagMagic   []byte // fixed value "musicex\0" (8 bytes)
+}
+
+func NewMusicExTag(f io.ReadSeeker) (*MusicExTagV1, error) {
+	_, err := f.Seek(-16, io.SeekEnd)
+	if err != nil {
+		return nil, fmt.Errorf("musicex seek error: %w", err)
+	}
+
+	buffer := make([]byte, 16)
+	bytesRead, err := f.Read(buffer)
+	if err != nil {
+		return nil, fmt.Errorf("get musicex error: %w", err)
+	}
+	if bytesRead != 16 {
+		return nil, fmt.Errorf("MusicExV1: read %d bytes (expected %d)", bytesRead, 16)
+	}
+
+	tag := &MusicExTagV1{
+		TagSize:    binary.LittleEndian.Uint32(buffer[0x00:0x04]),
+		TagVersion: binary.LittleEndian.Uint32(buffer[0x04:0x08]),
+		TagMagic:   buffer[0x04:0x0C],
+	}
+
+	if !bytes.Equal(tag.TagMagic, []byte("musicex\x00")) {
+		return nil, errors.New("MusicEx magic mismatch")
+	}
+	if tag.TagVersion != 1 {
+		return nil, errors.New(fmt.Sprintf("unsupported musicex tag version. expecting 1, got %d", tag.TagVersion))
+	}
+
+	if tag.TagSize < 0xC0 {
+		return nil, errors.New(fmt.Sprintf("unsupported musicex tag size. expecting at least 0xC0, got 0x%02x", tag.TagSize))
+	}
+
+	buffer = make([]byte, tag.TagSize)
+	bytesRead, err = f.Read(buffer)
+	if err != nil {
+		return nil, err
+	}
+	if uint32(bytesRead) != tag.TagSize {
+		return nil, fmt.Errorf("MusicExV1: read %d bytes (expected %d)", bytesRead, tag.TagSize)
+	}
+
+	tag.SongID = binary.LittleEndian.Uint32(buffer[0x00:0x04])
+	tag.Unknown1 = binary.LittleEndian.Uint32(buffer[0x04:0x08])
+	tag.Unknown2 = binary.LittleEndian.Uint32(buffer[0x08:0x0C])
+	tag.MediaID = readUnicodeTagName(buffer[0x0C:], 30*2)
+	tag.MediaFileName = readUnicodeTagName(buffer[0x48:], 50*2)
+	tag.Unknown3 = binary.LittleEndian.Uint32(buffer[0xAC:0xB0])
+	return tag, nil
+}
+
+// readUnicodeTagName reads a buffer to maxLen.
+// reconstruct text by skipping alternate char (ascii chars encoded in UTF-16-LE),
+// until finding a zero or reaching maxLen.
+func readUnicodeTagName(buffer []byte, maxLen int) string {
+	builder := strings.Builder{}
+
+	for i := 0; i < maxLen; i += 2 {
+		chr := buffer[i]
+		if chr != 0 {
+			builder.WriteByte(chr)
+		} else {
+			break
+		}
+	}
+
+	return builder.String()
+}
--- a/algo/qmc/qmc_meta.go
+++ b/algo/qmc/qmc_meta.go
@ -0,0 +1,128 @@
+package qmc
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/samber/lo"
+
+	"unlock-music.dev/cli/algo/common"
+	"unlock-music.dev/cli/algo/qmc/client"
+	"unlock-music.dev/cli/internal/ffmpeg"
+)
+
+func (d *Decoder) GetAudioMeta(ctx context.Context) (common.AudioMeta, error) {
+	if d.meta != nil {
+		return d.meta, nil
+	}
+
+	if d.songID != 0 {
+		if err := d.getMetaBySongID(ctx); err != nil {
+			return nil, err
+		}
+		return d.meta, nil
+	}
+
+	embedMeta, err := ffmpeg.ProbeReader(ctx, d.probeBuf)
+	if err != nil {
+		return nil, fmt.Errorf("qmc[GetAudioMeta] probe reader: %w", err)
+	}
+	d.meta = embedMeta
+	d.embeddedCover = embedMeta.HasAttachedPic()
+
+	if !d.embeddedCover && embedMeta.HasMetadata() {
+		if err := d.searchMetaOnline(ctx, embedMeta); err != nil {
+			return nil, err
+		}
+		return d.meta, nil
+	}
+
+	return d.meta, nil
+}
+
+func (d *Decoder) getMetaBySongID(ctx context.Context) error {
+	c := client.NewQQMusicClient() // todo: use global client
+	trackInfo, err := c.GetTrackInfo(ctx, d.songID)
+	if err != nil {
+		return fmt.Errorf("qmc[GetAudioMeta] get track info: %w", err)
+	}
+
+	d.meta = trackInfo
+	d.albumID = trackInfo.Album.Id
+	if trackInfo.Album.Pmid == "" {
+		d.albumMediaID = trackInfo.Album.Pmid
+	} else {
+		d.albumMediaID = trackInfo.Album.Mid
+	}
+	return nil
+}
+
+func (d *Decoder) searchMetaOnline(ctx context.Context, original common.AudioMeta) error {
+	c := client.NewQQMusicClient() // todo: use global client
+	keyword := lo.WithoutEmpty(append(
+		[]string{original.GetTitle(), original.GetAlbum()},
+		original.GetArtists()...),
+	)
+	if len(keyword) == 0 {
+		return errors.New("qmc[searchMetaOnline] no keyword")
+	}
+
+	trackList, err := c.Search(ctx, strings.Join(keyword, " "))
+	if err != nil {
+		return fmt.Errorf("qmc[searchMetaOnline] search: %w", err)
+	}
+
+	if len(trackList) == 0 {
+		return errors.New("qmc[searchMetaOnline] no result")
+	}
+
+	meta := trackList[0]
+	d.meta = meta
+	d.albumID = meta.Album.Id
+	if meta.Album.Pmid == "" {
+		d.albumMediaID = meta.Album.Pmid
+	} else {
+		d.albumMediaID = meta.Album.Mid
+	}
+
+	return nil
+}
+
+func (d *Decoder) GetCoverImage(ctx context.Context) ([]byte, error) {
+	if d.cover != nil {
+		return d.cover, nil
+	}
+
+	if d.embeddedCover {
+		img, err := ffmpeg.ExtractAlbumArt(ctx, d.probeBuf)
+		if err != nil {
+			return nil, fmt.Errorf("qmc[GetCoverImage] extract album art: %w", err)
+		}
+
+		d.cover = img.Bytes()
+
+		return d.cover, nil
+	}
+
+	c := client.NewQQMusicClient() // todo: use global client
+	var err error
+
+	if d.albumMediaID != "" {
+		d.cover, err = c.AlbumCoverByMediaID(ctx, d.albumMediaID)
+		if err != nil {
+			return nil, fmt.Errorf("qmc[GetCoverImage] get cover by media id: %w", err)
+		}
+	} else if d.albumID != 0 {
+		d.cover, err = c.AlbumCoverByID(ctx, d.albumID)
+		if err != nil {
+			return nil, fmt.Errorf("qmc[GetCoverImage] get cover by id: %w", err)
+		}
+	} else {
+		return nil, errors.New("qmc[GetAudioMeta] album (or media) id is empty")
+	}
+
+	return d.cover, nil
+
+}
--- a/algo/qmc/qmc_test.go
+++ b/algo/qmc/qmc_test.go
@ -7,6 +7,8 @@ import (
 	"os"
 	"reflect"
 	"testing"
+
+	"unlock-music.dev/cli/algo/common"
 )

 func loadTestDataQmcDecoder(filename string) ([]byte, []byte, error) {
@ -29,13 +31,14 @@ func loadTestDataQmcDecoder(filename string) ([]byte, []byte, error) {
 func TestMflac0Decoder_Read(t *testing.T) {
 	tests := []struct {
 		name    string
+		fileExt string
 		wantErr bool
 	}{
-		{"mflac0_rc4", false},
-		{"mflac_rc4", false},
-		{"mflac_map", false},
-		{"mgg_map", false},
-		{"qmc0_static", false},
+		{"mflac0_rc4", ".mflac0", false},
+		{"mflac_rc4", ".mflac", false},
+		{"mflac_map", ".mflac", false},
+		{"mgg_map", ".mgg", false},
+		{"qmc0_static", ".qmc0", false},
 	}

 	for _, tt := range tests {
@ -45,7 +48,10 @@ func TestMflac0Decoder_Read(t *testing.T) {
 				t.Fatal(err)
 			}

-			d := NewDecoder(bytes.NewReader(raw))
+			d := NewDecoder(&common.DecoderParams{
+				Reader:    bytes.NewReader(raw),
+				Extension: tt.fileExt,
+			})
 			if err := d.Validate(); err != nil {
 				t.Errorf("validate file error = %v", err)
 			}
@ -81,7 +87,10 @@ func TestMflac0Decoder_Validate(t *testing.T) {
 			if err != nil {
 				t.Fatal(err)
 			}
-			d := NewDecoder(bytes.NewReader(raw))
+			d := NewDecoder(&common.DecoderParams{
+				Reader:    bytes.NewReader(raw),
+				Extension: tt.fileExt,
+			})

 			if err := d.Validate(); err != nil {
 				t.Errorf("read bytes from decoder error = %v", err)
--- a/algo/tm/tm.go
+++ b/algo/tm/tm.go
@ -7,6 +7,7 @@ import (
 	"io"

 	"unlock-music.dev/cli/algo/common"
+	"unlock-music.dev/cli/internal/sniff"
 )

 var replaceHeader = []byte{0x00, 0x00, 0x00, 0x20, 0x66, 0x74, 0x79, 0x70}
@ -30,7 +31,7 @@ func (d *Decoder) Validate() error {
 		return nil
 	}

-	if _, ok := common.SniffAll(header); ok { // not encrypted
+	if _, ok := sniff.AudioExtension(header); ok { // not encrypted
 		d.audio = io.MultiReader(bytes.NewReader(header), d.raw)
 		return nil
 	}
@ -42,8 +43,8 @@ func (d *Decoder) Read(buf []byte) (int, error) {
 	return d.audio.Read(buf)
 }

-func NewTmDecoder(rd io.ReadSeeker) common.Decoder {
-	return &Decoder{raw: rd}
+func NewTmDecoder(p *common.DecoderParams) common.Decoder {
+	return &Decoder{raw: p.Reader}
 }

 func init() {
--- a/algo/xiami/xm.go
+++ b/algo/xiami/xm.go
@ -37,8 +37,8 @@ func (d *Decoder) GetAudioExt() string {
 	return ""
 }

-func NewDecoder(rd io.ReadSeeker) common.Decoder {
-	return &Decoder{rd: rd}
+func NewDecoder(p *common.DecoderParams) common.Decoder {
+	return &Decoder{rd: p.Reader}
 }

 // Validate checks if the file is a valid xiami .xm file.
--- a/algo/ximalaya/x2m_crypto.go
+++ b/algo/ximalaya/x2m_crypto.go
@ -15,10 +15,10 @@ var x2mScrambleTableBytes []byte

 func init() {
 	if len(x2mScrambleTableBytes) != 2*x2mHeaderSize {
-		panic("invalid x3m scramble table")
+		panic("invalid x2m scramble table")
 	}
-	for i := range x3mScrambleTable {
-		x3mScrambleTable[i] = binary.LittleEndian.Uint16(x2mScrambleTableBytes[i*2:])
+	for i := range x2mScrambleTable {
+		x2mScrambleTable[i] = binary.LittleEndian.Uint16(x2mScrambleTableBytes[i*2:])
 	}
 }

--- a/algo/ximalaya/ximalaya.go
+++ b/algo/ximalaya/ximalaya.go
@ -6,6 +6,7 @@ import (
 	"io"

 	"unlock-music.dev/cli/algo/common"
+	"unlock-music.dev/cli/internal/sniff"
 )

 type Decoder struct {
@ -15,8 +16,8 @@ type Decoder struct {
 	audio io.Reader
 }

-func NewDecoder(rd io.ReadSeeker) common.Decoder {
-	return &Decoder{rd: rd}
+func NewDecoder(p *common.DecoderParams) common.Decoder {
+	return &Decoder{rd: p.Reader}
 }

 func (d *Decoder) Validate() error {
@ -27,7 +28,7 @@ func (d *Decoder) Validate() error {

 	{ // try to decode with x2m
 		header := decryptX2MHeader(encryptedHeader)
-		if _, ok := common.SniffAll(header); ok {
+		if _, ok := sniff.AudioExtension(header); ok {
 			d.audio = io.MultiReader(bytes.NewReader(header), d.rd)
 			return nil
 		}
@ -36,7 +37,7 @@ func (d *Decoder) Validate() error {
 	{ // 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 {
+		if _, ok := sniff.AudioExtension(header); ok {
 			d.audio = io.MultiReader(bytes.NewReader(header), d.rd)
 			return nil
 		}
--- a/cmd/um/main.go
+++ b/cmd/um/main.go
@ -2,34 +2,38 @@ package main

 import (
 	"bytes"
+	"context"
 	"errors"
 	"fmt"
+	"github.com/fsnotify/fsnotify"
+	"github.com/urfave/cli/v2"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
 	"io"
 	"os"
+	"os/signal"
 	"path/filepath"
 	"runtime"
 	"runtime/debug"
 	"sort"
 	"strings"
 	"time"
-
-	"github.com/urfave/cli/v2"
-	"go.uber.org/zap"
-
 	"unlock-music.dev/cli/algo/common"
 	_ "unlock-music.dev/cli/algo/kgm"
 	_ "unlock-music.dev/cli/algo/kwm"
 	_ "unlock-music.dev/cli/algo/ncm"
-	_ "unlock-music.dev/cli/algo/qmc"
+	"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"
+	"unlock-music.dev/cli/internal/ffmpeg"
+	"unlock-music.dev/cli/internal/sniff"
+	"unlock-music.dev/cli/internal/utils"
 )

-var AppVersion = "v0.0.6"
+var AppVersion = "v0.2.11"

-var logger, _ = logging.NewZapLogger() // TODO: inject logger to application, instead of using global logger
+var logger = setupLogger(false) // TODO: inject logger to application, instead of using global logger

 func main() {
 	module, ok := debug.ReadBuildInfo()
@ -44,9 +48,16 @@ func main() {
 		Flags: []cli.Flag{
 			&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},
+			&cli.StringFlag{Name: "qmc-mmkv", Aliases: []string{"db"}, Usage: "path to qmc mmkv (.crc file also required)", Required: false},
+			&cli.StringFlag{Name: "qmc-mmkv-key", Aliases: []string{"key"}, Usage: "mmkv password (16 ascii chars)", Required: false},
 			&cli.BoolFlag{Name: "remove-source", Aliases: []string{"rs"}, Usage: "remove source file", Required: false, Value: false},
 			&cli.BoolFlag{Name: "skip-noop", Aliases: []string{"n"}, Usage: "skip noop decoder", Required: false, Value: true},
-			&cli.BoolFlag{Name: "supported-ext", Usage: "Show supported file extensions and exit", Required: false, Value: false},
+			&cli.BoolFlag{Name: "verbose", Aliases: []string{"V"}, Usage: "verbose logging", Required: false, Value: false},
+			&cli.BoolFlag{Name: "update-metadata", Usage: "update metadata & album art from network", Required: false, Value: false},
+			&cli.BoolFlag{Name: "overwrite", Usage: "overwrite output file without asking", Required: false, Value: false},
+			&cli.BoolFlag{Name: "watch", Usage: "watch the input dir and process new files", Required: false, Value: false},
+
+			&cli.BoolFlag{Name: "supported-ext", Usage: "show supported file extensions and exit", Required: false, Value: false},
 		},

 		Action:          appMain,
@ -54,22 +65,59 @@ func main() {
 		HideHelpCommand: true,
 		UsageText:       "um [-o /path/to/output/dir] [--extra-flags] [-i] /path/to/input",
 	}
+
 	err := app.Run(os.Args)
 	if err != nil {
 		logger.Fatal("run app failed", zap.Error(err))
 	}
 }
+
 func printSupportedExtensions() {
 	var exts []string
-	for ext := range common.DecoderRegistry {
+	extSet := make(map[string]int)
+	for _, factory := range common.DecoderRegistry {
+		ext := strings.TrimPrefix(factory.Suffix, ".")
+		if n, ok := extSet[ext]; ok {
+			extSet[ext] = n + 1
+		} else {
+			extSet[ext] = 1
+		}
+	}
+	for ext := range extSet {
 		exts = append(exts, ext)
 	}
 	sort.Strings(exts)
 	for _, ext := range exts {
-		fmt.Printf("%s: %d\n", ext, len(common.DecoderRegistry[ext]))
+		fmt.Printf("%s: %d\n", ext, extSet[ext])
 	}
 }
+
+func setupLogger(verbose bool) *zap.Logger {
+	logConfig := zap.NewProductionEncoderConfig()
+	logConfig.EncodeLevel = zapcore.CapitalColorLevelEncoder
+	logConfig.EncodeTime = zapcore.RFC3339TimeEncoder
+	enabler := zap.LevelEnablerFunc(func(level zapcore.Level) bool {
+		if verbose {
+			return true
+		}
+		return level >= zapcore.InfoLevel
+	})
+
+	return zap.New(zapcore.NewCore(
+		zapcore.NewConsoleEncoder(logConfig),
+		os.Stdout,
+		enabler,
+	))
+}
+
 func appMain(c *cli.Context) (err error) {
+	logger = setupLogger(c.Bool("verbose"))
+
+	cwd, err := os.Getwd()
+	if err != nil {
+		return err
+	}
+
 	if c.Bool("supported-ext") {
 		printSupportedExtensions()
 		return nil
@ -78,10 +126,7 @@ func appMain(c *cli.Context) (err error) {
 	if input == "" {
 		switch c.Args().Len() {
 		case 0:
-			input, err = os.Getwd()
-			if err != nil {
-				return err
-			}
+			input = cwd
 		case 1:
 			input = c.Args().Get(0)
 		default:
@ -89,26 +134,34 @@ func appMain(c *cli.Context) (err error) {
 		}
 	}

+	input, absErr := filepath.Abs(input)
+	if absErr != nil {
+		return fmt.Errorf("get abs path failed: %w", absErr)
+	}
+
 	output := c.String("output")
-	if output == "" {
-		var err error
-		output, err = os.Getwd()
-		if err != nil {
-			return err
-		}
-		if input == output {
-			return errors.New("input and output path are same")
-		}
-	}
-
-	skipNoop := c.Bool("skip-noop")
-	removeSource := c.Bool("remove-source")
-
 	inputStat, err := os.Stat(input)
 	if err != nil {
 		return err
 	}

+	var inputDir string
+	if inputStat.IsDir() {
+		inputDir = input
+	} else {
+		inputDir = filepath.Dir(input)
+	}
+	inputDir, absErr = filepath.Abs(inputDir)
+	if absErr != nil {
+		return fmt.Errorf("get abs path (inputDir) failed: %w", absErr)
+	}
+
+	if output == "" {
+		// Default to where the input dir is
+		output = inputDir
+	}
+	logger.Debug("resolve input/output path", zap.String("inputDir", inputDir), zap.String("input", input), zap.String("output", output))
+
 	outputStat, err := os.Stat(output)
 	if err != nil {
 		if errors.Is(err, os.ErrNotExist) {
@ -121,97 +174,276 @@ func appMain(c *cli.Context) (err error) {
 		return errors.New("output should be a writable directory")
 	}

-	if inputStat.IsDir() {
-		return dealDirectory(input, output, skipNoop, removeSource)
-	} else {
-		allDec := common.GetDecoder(inputStat.Name(), skipNoop)
-		if len(allDec) == 0 {
-			logger.Fatal("skipping while no suitable decoder")
+	if mmkv := c.String("qmc-mmkv"); mmkv != "" {
+		// If key is not set, the mmkv vault will be treated as unencrypted.
+		key := c.String("qmc-mmkv-key")
+		err := qmc.OpenMMKV(mmkv, key, logger)
+		if err != nil {
+			return err
 		}
-		return tryDecFile(input, output, allDec, removeSource)
+	}
+
+	proc := &processor{
+		logger:          logger,
+		inputDir:        inputDir,
+		outputDir:       output,
+		skipNoopDecoder: c.Bool("skip-noop"),
+		removeSource:    c.Bool("remove-source"),
+		updateMetadata:  c.Bool("update-metadata"),
+		overwriteOutput: c.Bool("overwrite"),
+	}
+
+	if inputStat.IsDir() {
+		watchDir := c.Bool("watch")
+		if !watchDir {
+			return proc.processDir(input)
+		} else {
+			return proc.watchDir(input)
+		}
+	} else {
+		return proc.processFile(input)
 	}

 }
-func dealDirectory(inputDir string, outputDir string, skipNoop bool, removeSource bool) error {
+
+type processor struct {
+	logger    *zap.Logger
+	inputDir  string
+	outputDir string
+
+	skipNoopDecoder bool
+	removeSource    bool
+	updateMetadata  bool
+	overwriteOutput bool
+}
+
+func (p *processor) watchDir(inputDir string) error {
+	if err := p.processDir(inputDir); err != nil {
+		return err
+	}
+
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		return fmt.Errorf("failed to create watcher: %w", err)
+	}
+	defer watcher.Close()
+
+	go func() {
+		for {
+			select {
+			case event, ok := <-watcher.Events:
+				if !ok {
+					return
+				}
+
+				if event.Has(fsnotify.Create) || event.Has(fsnotify.Write) {
+					// try open with exclusive mode, to avoid file is still writing
+					f, err := os.OpenFile(event.Name, os.O_RDONLY, os.ModeExclusive)
+					if err != nil {
+						logger.Debug("failed to open file exclusively", zap.String("path", event.Name), zap.Error(err))
+						time.Sleep(1 * time.Second) // wait for file writing complete
+						continue
+					}
+					_ = f.Close()
+
+					if err := p.processFile(event.Name); err != nil {
+						logger.Warn("failed to process file", zap.String("path", event.Name), zap.Error(err))
+					}
+				}
+			case err, ok := <-watcher.Errors:
+				if !ok {
+					return
+				}
+				logger.Error("file watcher got error", zap.Error(err))
+			}
+		}
+	}()
+
+	err = watcher.Add(inputDir)
+	if err != nil {
+		return fmt.Errorf("failed to watch dir %s: %w", inputDir, err)
+	}
+
+	signalCtx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
+	defer stop()
+
+	<-signalCtx.Done()
+	return nil
+}
+
+func (p *processor) processDir(inputDir string) error {
 	items, err := os.ReadDir(inputDir)
 	if err != nil {
 		return err
 	}
+
+	var lastError error = nil
 	for _, item := range items {
+		filePath := filepath.Join(inputDir, item.Name())
 		if item.IsDir() {
-			continue
+			if err = p.processDir(filePath); err != nil {
+				lastError = err
 			}
-		allDec := common.GetDecoder(item.Name(), skipNoop)
-		if len(allDec) == 0 {
-			logger.Info("skipping while no suitable decoder", zap.String("file", item.Name()))
 			continue
 		}

-		err := tryDecFile(filepath.Join(inputDir, item.Name()), outputDir, allDec, removeSource)
-		if err != nil {
+		if err := p.processFile(filePath); err != nil {
+			lastError = err
 			logger.Error("conversion failed", zap.String("source", item.Name()), zap.Error(err))
 		}
 	}
+	if lastError != nil {
+		return fmt.Errorf("last error: %w", lastError)
+	}
 	return nil
 }

-func tryDecFile(inputFile string, outputDir string, allDec []common.NewDecoderFunc, removeSource bool) error {
+func (p *processor) processFile(filePath string) error {
+	p.logger.Debug("processFile", zap.String("file", filePath), zap.String("inputDir", p.inputDir))
+
+	allDec := common.GetDecoder(filePath, p.skipNoopDecoder)
+	if len(allDec) == 0 {
+		return errors.New("skipping while no suitable decoder")
+	}
+
+	if err := p.process(filePath, allDec); err != nil {
+		return err
+	}
+
+	// if source file need to be removed
+	if p.removeSource {
+		err := os.RemoveAll(filePath)
+		if err != nil {
+			return err
+		}
+		logger.Info("source file removed after success conversion", zap.String("source", filePath))
+	}
+	return nil
+}
+
+func (p *processor) findDecoder(decoders []common.DecoderFactory, params *common.DecoderParams) (*common.Decoder, *common.DecoderFactory, error) {
+	for _, factory := range decoders {
+		dec := factory.Create(params)
+		err := dec.Validate()
+		if err == nil {
+			return &dec, &factory, nil
+		}
+		logger.Warn("try decode failed", zap.Error(err))
+	}
+	return nil, nil, errors.New("no any decoder can resolve the file")
+}
+
+func (p *processor) process(inputFile string, allDec []common.DecoderFactory) error {
 	file, err := os.Open(inputFile)
 	if err != nil {
 		return err
 	}
 	defer file.Close()
+	logger := logger.With(zap.String("source", inputFile))

-	var dec common.Decoder
-	for _, decFunc := range allDec {
-		dec = decFunc(file)
-		if err := dec.Validate(); err == nil {
-			break
-		} else {
-			logger.Warn("try decode failed", zap.Error(err))
-			dec = nil
-		}
-	}
-	if dec == nil {
-		return errors.New("no any decoder can resolve the file")
+	pDec, decoderFactory, err := p.findDecoder(allDec, &common.DecoderParams{
+		Reader:    file,
+		Extension: filepath.Ext(inputFile),
+		FilePath:  inputFile,
+		Logger:    logger,
+	})
+	if err != nil {
+		return err
 	}
+	dec := *pDec
+
+	params := &ffmpeg.UpdateMetadataParams{}

 	header := bytes.NewBuffer(nil)
-	_, err = io.CopyN(header, dec, 16)
+	_, err = io.CopyN(header, dec, 64)
 	if err != nil {
 		return fmt.Errorf("read header failed: %w", err)
 	}
+	audio := io.MultiReader(header, dec)
+	params.AudioExt = sniff.AudioExtensionWithFallback(header.Bytes(), ".mp3")

-	outExt := ".mp3"
-	if ext, ok := common.SniffAll(header.Bytes()); ok {
-		outExt = ext
+	if p.updateMetadata {
+		if audioMetaGetter, ok := dec.(common.AudioMetaGetter); ok {
+			ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+			defer cancel()
+
+			// since ffmpeg doesn't support multiple input streams,
+			// we need to write the audio to a temp file.
+			// since qmc decoder doesn't support seeking & relying on ffmpeg probe, we need to read the whole file.
+			// TODO: support seeking or using pipe for qmc decoder.
+			params.Audio, err = utils.WriteTempFile(audio, params.AudioExt)
+			if err != nil {
+				return fmt.Errorf("updateAudioMeta write temp file: %w", err)
 			}
-	filenameOnly := strings.TrimSuffix(filepath.Base(inputFile), filepath.Ext(inputFile))
+			defer os.Remove(params.Audio)

-	outPath := filepath.Join(outputDir, filenameOnly+outExt)
+			params.Meta, err = audioMetaGetter.GetAudioMeta(ctx)
+			if err != nil {
+				logger.Warn("get audio meta failed", zap.Error(err))
+			}
+
+			if params.Meta == nil { // reset audio meta if failed
+				audio, err = os.Open(params.Audio)
+				if err != nil {
+					return fmt.Errorf("updateAudioMeta open temp file: %w", err)
+				}
+			}
+		}
+	}
+
+	if p.updateMetadata && params.Meta != nil {
+		if coverGetter, ok := dec.(common.CoverImageGetter); ok {
+			ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+			defer cancel()
+
+			if cover, err := coverGetter.GetCoverImage(ctx); err != nil {
+				logger.Warn("get cover image failed", zap.Error(err))
+			} else if imgExt, ok := sniff.ImageExtension(cover); !ok {
+				logger.Warn("sniff cover image type failed", zap.Error(err))
+			} else {
+				params.AlbumArtExt = imgExt
+				params.AlbumArt = cover
+			}
+		}
+	}
+
+	inputRelDir, err := filepath.Rel(p.inputDir, filepath.Dir(inputFile))
+	if err != nil {
+		return fmt.Errorf("get relative dir failed: %w", err)
+	}
+
+	inFilename := strings.TrimSuffix(filepath.Base(inputFile), decoderFactory.Suffix)
+	outPath := filepath.Join(p.outputDir, inputRelDir, inFilename+params.AudioExt)
+
+	if !p.overwriteOutput {
+		_, err := os.Stat(outPath)
+		if err == nil {
+			logger.Warn("output file already exist, skip", zap.String("destination", outPath))
+			return nil
+		} else if !errors.Is(err, os.ErrNotExist) {
+			return fmt.Errorf("stat output file failed: %w", err)
+		}
+	}
+
+	if params.Meta == nil {
 		outFile, err := os.OpenFile(outPath, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0644)
 		if err != nil {
 			return err
 		}
 		defer outFile.Close()

-	if _, err := io.Copy(outFile, header); err != nil {
+		if _, err := io.Copy(outFile, audio); err != nil {
 			return err
 		}
-	if _, err := io.Copy(outFile, dec); err != nil {
-		return err
-	}
-
-	// if source file need to be removed
-	if removeSource {
-		err := os.RemoveAll(inputFile)
-		if err != nil {
-			return err
-		}
-		logger.Info("successfully converted, and source file is removed", zap.String("source", inputFile), zap.String("destination", outPath))
 	} else {
-		logger.Info("successfully converted", zap.String("source", inputFile), zap.String("destination", outPath))
+		ctx, cancel := context.WithTimeout(context.Background(), time.Minute)
+		defer cancel()
+
+		if err := ffmpeg.UpdateMeta(ctx, outPath, params, logger); err != nil {
+			return err
+		}
 	}

+	logger.Info("successfully converted", zap.String("source", inputFile), zap.String("destination", outPath))
 	return nil
 }
--- a/go.mod
+++ b/go.mod
@ -1,17 +1,26 @@
 module unlock-music.dev/cli

-go 1.17
+go 1.23.3

 require (
-	github.com/urfave/cli/v2 v2.23.5
-	go.uber.org/zap v1.23.0
-	golang.org/x/crypto v0.3.0
+	github.com/fsnotify/fsnotify v1.8.0
+	github.com/go-flac/flacpicture v0.3.0
+	github.com/go-flac/flacvorbis v0.2.0
+	github.com/go-flac/go-flac v1.0.0
+	github.com/samber/lo v1.47.0
+	github.com/urfave/cli/v2 v2.27.5
+	go.uber.org/zap v1.27.0
+	golang.org/x/crypto v0.29.0
+	golang.org/x/exp v0.0.0-20241108190413-2d47ceb2692f
+	golang.org/x/text v0.20.0
+	unlock-music.dev/mmkv v0.1.0
 )

 require (
-	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.5 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
-	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
-	go.uber.org/atomic v1.10.0 // indirect
-	go.uber.org/multierr v1.8.0 // indirect
+	github.com/xrash/smetrics v0.0.0-20240521201337-686a1a2994c1 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/sys v0.27.0 // indirect
+	google.golang.org/protobuf v1.35.2 // indirect
 )
--- a/go.sum
+++ b/go.sum
@ -1,88 +1,60 @@
-github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
-github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
-github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
-github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
-github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/cpuguy83/go-md2man/v2 v2.0.4 h1:wfIWP927BUkWJb2NmU/kNDYIBTh/ziUX91+lVfRxZq4=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
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+github.com/cpuguy83/go-md2man/v2 v2.0.5/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
-github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
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 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
-github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
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+go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
+go.uber.org/zap v1.27.0 h1:aJMhYGrd5QSmlpLMr2MftRKl7t8J8PTZPA732ud/XR8=
+go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E=
+golang.org/x/crypto v0.26.0 h1:RrRspgV4mU+YwB4FYnuBoKsUapNIL5cohGAmSH3azsw=
+golang.org/x/crypto v0.26.0/go.mod h1:GY7jblb9wI+FOo5y8/S2oY4zWP07AkOJ4+jxCqdqn54=
+golang.org/x/crypto v0.29.0 h1:L5SG1JTTXupVV3n6sUqMTeWbjAyfPwoda2DLX8J8FrQ=
+golang.org/x/crypto v0.29.0/go.mod h1:+F4F4N5hv6v38hfeYwTdx20oUvLLc+QfrE9Ax9HtgRg=
+golang.org/x/exp v0.0.0-20241108190413-2d47ceb2692f h1:XdNn9LlyWAhLVp6P/i8QYBW+hlyhrhei9uErw2B5GJo=
+golang.org/x/exp v0.0.0-20241108190413-2d47ceb2692f/go.mod h1:D5SMRVC3C2/4+F/DB1wZsLRnSNimn2Sp/NPsCrsv8ak=
+golang.org/x/sys v0.23.0 h1:YfKFowiIMvtgl1UERQoTPPToxltDeZfbj4H7dVUCwmM=
+golang.org/x/sys v0.23.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.27.0 h1:wBqf8DvsY9Y/2P8gAfPDEYNuS30J4lPHJxXSb/nJZ+s=
+golang.org/x/sys v0.27.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc=
+golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
+golang.org/x/text v0.20.0 h1:gK/Kv2otX8gz+wn7Rmb3vT96ZwuoxnQlY+HlJVj7Qug=
+golang.org/x/text v0.20.0/go.mod h1:D4IsuqiFMhST5bX19pQ9ikHC2GsaKyk/oF+pn3ducp4=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
+google.golang.org/protobuf v1.35.2/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+unlock-music.dev/mmkv v0.1.0 h1:hgUHo0gJVoiKZ6bOcFOw2LHFqNiefIe+jb5o0OyL720=
+unlock-music.dev/mmkv v0.1.0/go.mod h1:qr34SM3x8xRxyUfGzefH/rSi+DUXkQZcSfXY/yfuTeo=
--- a/internal/ffmpeg/ffmpeg.go
+++ b/internal/ffmpeg/ffmpeg.go
@ -0,0 +1,126 @@
+package ffmpeg
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"go.uber.org/zap"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+
+	"unlock-music.dev/cli/algo/common"
+	"unlock-music.dev/cli/internal/utils"
+)
+
+func ExtractAlbumArt(ctx context.Context, rd io.Reader) (*bytes.Buffer, error) {
+	cmd := exec.CommandContext(ctx, "ffmpeg",
+		"-i", "pipe:0", // input from stdin
+		"-an",              // disable audio
+		"-codec:v", "copy", // copy video(image) codec
+		"-f", "image2", // use image2 muxer
+		"pipe:1", // output to stdout
+	)
+
+	cmd.Stdin = rd
+	stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
+	cmd.Stdout, cmd.Stderr = stdout, stderr
+
+	if err := cmd.Run(); err != nil {
+		return nil, fmt.Errorf("ffmpeg run: %w", err)
+	}
+
+	return stdout, nil
+}
+
+type UpdateMetadataParams struct {
+	Audio    string // required
+	AudioExt string // required
+
+	Meta common.AudioMeta // required
+
+	AlbumArt    []byte // optional
+	AlbumArtExt string // required if AlbumArt is not nil
+}
+
+func UpdateMeta(ctx context.Context, outPath string, params *UpdateMetadataParams, logger *zap.Logger) error {
+	if params.AudioExt == ".flac" {
+		return updateMetaFlac(ctx, outPath, params, logger.With(zap.String("module", "updateMetaFlac")))
+	} else {
+		return updateMetaFFmpeg(ctx, outPath, params)
+	}
+}
+func updateMetaFFmpeg(ctx context.Context, outPath string, params *UpdateMetadataParams) error {
+	builder := newFFmpegBuilder()
+
+	out := newOutputBuilder(outPath) // output to file
+	builder.SetFlag("y")             // overwrite output file
+	builder.AddOutput(out)
+
+	// input audio -> output audio
+	builder.AddInput(newInputBuilder(params.Audio)) // input 0: audio
+	out.AddOption("map", "0:a")
+	out.AddOption("codec:a", "copy")
+
+	// input cover -> output cover
+	if params.AlbumArt != nil &&
+		params.AudioExt != ".wav" /* wav doesn't support attached image */ {
+
+		// write cover to temp file
+		artPath, err := utils.WriteTempFile(bytes.NewReader(params.AlbumArt), params.AlbumArtExt)
+		if err != nil {
+			return fmt.Errorf("updateAudioMeta write temp file: %w", err)
+		}
+		defer os.Remove(artPath)
+
+		builder.AddInput(newInputBuilder(artPath)) // input 1: cover
+		out.AddOption("map", "1:v")
+
+		switch params.AudioExt {
+		case ".ogg": // ogg only supports theora codec
+			out.AddOption("codec:v", "libtheora")
+		case ".m4a": // .m4a(mp4) requires set codec, disposition, stream metadata
+			out.AddOption("codec:v", "mjpeg")
+			out.AddOption("disposition:v", "attached_pic")
+			out.AddMetadata("s:v", "title", "Album cover")
+			out.AddMetadata("s:v", "comment", "Cover (front)")
+		case ".mp3":
+			out.AddOption("codec:v", "mjpeg")
+			out.AddMetadata("s:v", "title", "Album cover")
+			out.AddMetadata("s:v", "comment", "Cover (front)")
+		default: // other formats use default behavior
+		}
+	}
+
+	// set file metadata
+	album := params.Meta.GetAlbum()
+	if album != "" {
+		out.AddMetadata("", "album", album)
+	}
+
+	title := params.Meta.GetTitle()
+	if album != "" {
+		out.AddMetadata("", "title", title)
+	}
+
+	artists := params.Meta.GetArtists()
+	if len(artists) != 0 {
+		// TODO: it seems that ffmpeg doesn't support multiple artists
+		out.AddMetadata("", "artist", strings.Join(artists, " / "))
+	}
+
+	if params.AudioExt == ".mp3" {
+		out.AddOption("write_id3v1", "true")
+		out.AddOption("id3v2_version", "3")
+	}
+
+	// execute ffmpeg
+	cmd := builder.Command(ctx)
+
+	if stdout, err := cmd.CombinedOutput(); err != nil {
+		return fmt.Errorf("ffmpeg run: %w, %s", err, string(stdout))
+	}
+
+	return nil
+}
--- a/internal/ffmpeg/ffprobe.go
+++ b/internal/ffmpeg/ffprobe.go
@ -0,0 +1,141 @@
+package ffmpeg
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io"
+	"os/exec"
+	"strings"
+
+	"github.com/samber/lo"
+)
+
+type Result struct {
+	Format  *Format   `json:"format"`
+	Streams []*Stream `json:"streams"`
+}
+
+func (r *Result) HasAttachedPic() bool {
+	return lo.ContainsBy(r.Streams, func(s *Stream) bool {
+		return s.CodecType == "video"
+	})
+}
+
+func (r *Result) getTagByKey(key string) string {
+	for k, v := range r.Format.Tags {
+		if key == strings.ToLower(k) {
+			return v
+		}
+	}
+
+	for _, stream := range r.Streams { // try to find in streams
+		if stream.CodecType != "audio" {
+			continue
+		}
+		for k, v := range stream.Tags {
+			if key == strings.ToLower(k) {
+				return v
+			}
+		}
+	}
+	return ""
+}
+func (r *Result) GetTitle() string {
+	return r.getTagByKey("title")
+}
+
+func (r *Result) GetAlbum() string {
+	return r.getTagByKey("album")
+}
+
+func (r *Result) GetArtists() []string {
+	artists := strings.Split(r.getTagByKey("artist"), "/")
+	for i := range artists {
+		artists[i] = strings.TrimSpace(artists[i])
+	}
+	return artists
+}
+
+func (r *Result) HasMetadata() bool {
+	return r.GetTitle() != "" || r.GetAlbum() != "" || len(r.GetArtists()) > 0
+}
+
+type Format struct {
+	Filename       string            `json:"filename"`
+	NbStreams      int               `json:"nb_streams"`
+	NbPrograms     int               `json:"nb_programs"`
+	FormatName     string            `json:"format_name"`
+	FormatLongName string            `json:"format_long_name"`
+	StartTime      string            `json:"start_time"`
+	Duration       string            `json:"duration"`
+	BitRate        string            `json:"bit_rate"`
+	ProbeScore     int               `json:"probe_score"`
+	Tags           map[string]string `json:"tags"`
+}
+
+type Stream struct {
+	Index          int               `json:"index"`
+	CodecName      string            `json:"codec_name"`
+	CodecLongName  string            `json:"codec_long_name"`
+	CodecType      string            `json:"codec_type"`
+	CodecTagString string            `json:"codec_tag_string"`
+	CodecTag       string            `json:"codec_tag"`
+	SampleFmt      string            `json:"sample_fmt"`
+	SampleRate     string            `json:"sample_rate"`
+	Channels       int               `json:"channels"`
+	ChannelLayout  string            `json:"channel_layout"`
+	BitsPerSample  int               `json:"bits_per_sample"`
+	RFrameRate     string            `json:"r_frame_rate"`
+	AvgFrameRate   string            `json:"avg_frame_rate"`
+	TimeBase       string            `json:"time_base"`
+	StartPts       int               `json:"start_pts"`
+	StartTime      string            `json:"start_time"`
+	BitRate        string            `json:"bit_rate"`
+	Disposition    *ProbeDisposition `json:"disposition"`
+	Tags           map[string]string `json:"tags"`
+}
+
+type ProbeDisposition struct {
+	Default         int `json:"default"`
+	Dub             int `json:"dub"`
+	Original        int `json:"original"`
+	Comment         int `json:"comment"`
+	Lyrics          int `json:"lyrics"`
+	Karaoke         int `json:"karaoke"`
+	Forced          int `json:"forced"`
+	HearingImpaired int `json:"hearing_impaired"`
+	VisualImpaired  int `json:"visual_impaired"`
+	CleanEffects    int `json:"clean_effects"`
+	AttachedPic     int `json:"attached_pic"`
+	TimedThumbnails int `json:"timed_thumbnails"`
+	Captions        int `json:"captions"`
+	Descriptions    int `json:"descriptions"`
+	Metadata        int `json:"metadata"`
+	Dependent       int `json:"dependent"`
+	StillImage      int `json:"still_image"`
+}
+
+func ProbeReader(ctx context.Context, rd io.Reader) (*Result, error) {
+	cmd := exec.CommandContext(ctx, "ffprobe",
+		"-v", "quiet", // disable logging
+		"-print_format", "json", // use json format
+		"-show_format", "-show_streams", "-show_error", // retrieve format and streams
+		"pipe:0", // input from stdin
+	)
+
+	cmd.Stdin = rd
+	stdout, stderr := &bytes.Buffer{}, &bytes.Buffer{}
+	cmd.Stdout, cmd.Stderr = stdout, stderr
+
+	if err := cmd.Run(); err != nil {
+		return nil, err
+	}
+
+	ret := new(Result)
+	if err := json.Unmarshal(stdout.Bytes(), ret); err != nil {
+		return nil, err
+	}
+
+	return ret, nil
+}
--- a/internal/ffmpeg/meta_flac.go
+++ b/internal/ffmpeg/meta_flac.go
@ -0,0 +1,94 @@
+package ffmpeg
+
+import (
+	"context"
+	"go.uber.org/zap"
+	"mime"
+	"strings"
+
+	"github.com/go-flac/flacpicture"
+	"github.com/go-flac/flacvorbis"
+	"github.com/go-flac/go-flac"
+	"golang.org/x/exp/slices"
+)
+
+func updateMetaFlac(_ context.Context, outPath string, m *UpdateMetadataParams, logger *zap.Logger) error {
+	f, err := flac.ParseFile(m.Audio)
+	if err != nil {
+		return err
+	}
+
+	// generate comment block
+	comment := flacvorbis.MetaDataBlockVorbisComment{Vendor: "unlock-music.dev"}
+
+	// add metadata
+	title := m.Meta.GetTitle()
+	if title != "" {
+		_ = comment.Add(flacvorbis.FIELD_TITLE, title)
+	}
+
+	album := m.Meta.GetAlbum()
+	if album != "" {
+		_ = comment.Add(flacvorbis.FIELD_ALBUM, album)
+	}
+
+	artists := m.Meta.GetArtists()
+	for _, artist := range artists {
+		_ = comment.Add(flacvorbis.FIELD_ARTIST, artist)
+	}
+
+	existCommentIdx := slices.IndexFunc(f.Meta, func(b *flac.MetaDataBlock) bool {
+		return b.Type == flac.VorbisComment
+	})
+	if existCommentIdx >= 0 { // copy existing comment fields
+		exist, err := flacvorbis.ParseFromMetaDataBlock(*f.Meta[existCommentIdx])
+		if err != nil {
+			for _, s := range exist.Comments {
+				if strings.HasPrefix(s, flacvorbis.FIELD_TITLE+"=") && title != "" ||
+					strings.HasPrefix(s, flacvorbis.FIELD_ALBUM+"=") && album != "" ||
+					strings.HasPrefix(s, flacvorbis.FIELD_ARTIST+"=") && len(artists) != 0 {
+					continue
+				}
+				comment.Comments = append(comment.Comments, s)
+			}
+		}
+	}
+
+	// add / replace flac comment
+	cmtBlock := comment.Marshal()
+	if existCommentIdx < 0 {
+		f.Meta = append(f.Meta, &cmtBlock)
+	} else {
+		f.Meta[existCommentIdx] = &cmtBlock
+	}
+
+	if m.AlbumArt != nil {
+		coverMime := mime.TypeByExtension(m.AlbumArtExt)
+		logger.Debug("cover image mime detect", zap.String("mime", coverMime))
+		cover, err := flacpicture.NewFromImageData(
+			flacpicture.PictureTypeFrontCover,
+			"Front cover",
+			m.AlbumArt,
+			coverMime,
+		)
+
+		if err != nil {
+			logger.Warn("failed to create flac cover", zap.Error(err))
+		} else {
+			coverBlock := cover.Marshal()
+			f.Meta = append(f.Meta, &coverBlock)
+
+			// add / replace flac cover
+			coverIdx := slices.IndexFunc(f.Meta, func(b *flac.MetaDataBlock) bool {
+				return b.Type == flac.Picture
+			})
+			if coverIdx < 0 {
+				f.Meta = append(f.Meta, &coverBlock)
+			} else {
+				f.Meta[coverIdx] = &coverBlock
+			}
+		}
+	}
+
+	return f.Save(outPath)
+}
--- a/internal/ffmpeg/options.go
+++ b/internal/ffmpeg/options.go
@ -0,0 +1,131 @@
+package ffmpeg
+
+import (
+	"context"
+	"os/exec"
+	"strings"
+)
+
+type ffmpegBuilder struct {
+	binary  string            // ffmpeg binary path
+	options map[string]string // global options
+	inputs  []*inputBuilder   // input options
+	outputs []*outputBuilder  // output options
+}
+
+func newFFmpegBuilder() *ffmpegBuilder {
+	return &ffmpegBuilder{
+		binary:  "ffmpeg",
+		options: make(map[string]string),
+	}
+}
+
+func (b *ffmpegBuilder) AddInput(src *inputBuilder) {
+	b.inputs = append(b.inputs, src)
+}
+
+func (b *ffmpegBuilder) AddOutput(dst *outputBuilder) {
+	b.outputs = append(b.outputs, dst)
+}
+
+func (b *ffmpegBuilder) SetBinary(bin string) {
+	b.binary = bin
+}
+
+func (b *ffmpegBuilder) SetFlag(flag string) {
+	b.options[flag] = ""
+}
+
+func (b *ffmpegBuilder) SetOption(name, value string) {
+	b.options[name] = value
+}
+
+func (b *ffmpegBuilder) Args() (args []string) {
+	for name, val := range b.options {
+		args = append(args, "-"+name)
+		if val != "" {
+			args = append(args, val)
+		}
+	}
+
+	for _, input := range b.inputs {
+		args = append(args, input.Args()...)
+	}
+	for _, output := range b.outputs {
+		args = append(args, output.Args()...)
+	}
+
+	return
+}
+
+func (b *ffmpegBuilder) Command(ctx context.Context) *exec.Cmd {
+	bin := "ffmpeg"
+	if b.binary != "" {
+		bin = b.binary
+	}
+
+	return exec.CommandContext(ctx, bin, b.Args()...)
+}
+
+// inputBuilder is the builder for ffmpeg input options
+type inputBuilder struct {
+	path    string
+	options map[string][]string
+}
+
+func newInputBuilder(path string) *inputBuilder {
+	return &inputBuilder{
+		path:    path,
+		options: make(map[string][]string),
+	}
+}
+
+func (b *inputBuilder) AddOption(name, value string) {
+	b.options[name] = append(b.options[name], value)
+}
+
+func (b *inputBuilder) Args() (args []string) {
+	for name, values := range b.options {
+		for _, val := range values {
+			args = append(args, "-"+name, val)
+		}
+	}
+	return append(args, "-i", b.path)
+}
+
+// outputBuilder is the builder for ffmpeg output options
+type outputBuilder struct {
+	path    string
+	options map[string][]string
+}
+
+func newOutputBuilder(path string) *outputBuilder {
+	return &outputBuilder{
+		path:    path,
+		options: make(map[string][]string),
+	}
+}
+
+func (b *outputBuilder) AddOption(name, value string) {
+	b.options[name] = append(b.options[name], value)
+}
+
+func (b *outputBuilder) Args() (args []string) {
+	for name, values := range b.options {
+		for _, val := range values {
+			args = append(args, "-"+name, val)
+		}
+	}
+	return append(args, b.path)
+}
+
+// AddMetadata is the shortcut for adding "metadata" option
+func (b *outputBuilder) AddMetadata(stream, key, value string) {
+	optVal := strings.TrimSpace(key) + "=" + strings.TrimSpace(value)
+
+	if stream != "" {
+		b.AddOption("metadata:"+stream, optVal)
+	} else {
+		b.AddOption("metadata", optVal)
+	}
+}
--- a/internal/sniff/audio.go
+++ b/internal/sniff/audio.go
@ -0,0 +1,106 @@
+package sniff
+
+import (
+	"bytes"
+	"encoding/binary"
+
+	"golang.org/x/exp/slices"
+)
+
+type Sniffer interface {
+	Sniff(header []byte) bool
+}
+
+var audioExtensions = map[string]Sniffer{
+	// ref: https://mimesniff.spec.whatwg.org
+	".mp3": prefixSniffer("ID3"), // todo: check mp3 without ID3v2 tag
+	".ogg": prefixSniffer("OggS"),
+	".wav": prefixSniffer("RIFF"),
+
+	// ref: https://www.loc.gov/preservation/digital/formats/fdd/fdd000027.shtml
+	".wma": prefixSniffer{
+		0x30, 0x26, 0xb2, 0x75, 0x8e, 0x66, 0xcf, 0x11,
+		0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c,
+	},
+
+	// ref: https://www.garykessler.net/library/file_sigs.html
+	".m4a": m4aSniffer{},    // MPEG-4 container, Apple Lossless Audio Codec
+	".mp4": &mpeg4Sniffer{}, // MPEG-4 container, other fallback
+
+	".flac": prefixSniffer("fLaC"), // ref: https://xiph.org/flac/format.html
+	".dff":  prefixSniffer("FRM8"), // DSDIFF, ref: https://www.sonicstudio.com/pdf/dsd/DSDIFF_1.5_Spec.pdf
+
+}
+
+// AudioExtension sniffs the known audio types, and returns the file extension.
+// header is recommended to at least 16 bytes.
+func AudioExtension(header []byte) (string, bool) {
+	for ext, sniffer := range audioExtensions {
+		if sniffer.Sniff(header) {
+			return ext, true
+		}
+	}
+	return "", false
+}
+
+// AudioExtensionWithFallback is equivalent to AudioExtension, but returns fallback
+// most likely to use .mp3 as fallback, because mp3 files may not have ID3v2 tag.
+func AudioExtensionWithFallback(header []byte, fallback string) string {
+	ext, ok := AudioExtension(header)
+	if !ok {
+		return fallback
+	}
+	return ext
+}
+
+type prefixSniffer []byte
+
+func (s prefixSniffer) Sniff(header []byte) bool {
+	return bytes.HasPrefix(header, s)
+}
+
+type m4aSniffer struct{}
+
+func (m4aSniffer) Sniff(header []byte) bool {
+	box := readMpeg4FtypBox(header)
+	if box == nil {
+		return false
+	}
+
+	return box.majorBrand == "M4A " || slices.Contains(box.compatibleBrands, "M4A ")
+}
+
+type mpeg4Sniffer struct{}
+
+func (s *mpeg4Sniffer) Sniff(header []byte) bool {
+	return readMpeg4FtypBox(header) != nil
+}
+
+type mpeg4FtpyBox struct {
+	majorBrand       string
+	minorVersion     uint32
+	compatibleBrands []string
+}
+
+func readMpeg4FtypBox(header []byte) *mpeg4FtpyBox {
+	if (len(header) < 8) || !bytes.Equal([]byte("ftyp"), header[4:8]) {
+		return nil // not a valid ftyp box
+	}
+
+	size := binary.BigEndian.Uint32(header[0:4]) // size
+	if size < 16 || size%4 != 0 {
+		return nil // invalid ftyp box
+	}
+
+	box := mpeg4FtpyBox{
+		majorBrand:   string(header[8:12]),
+		minorVersion: binary.BigEndian.Uint32(header[12:16]),
+	}
+
+	// compatible brands
+	for i := 16; i < int(size) && i+4 < len(header); i += 4 {
+		box.compatibleBrands = append(box.compatibleBrands, string(header[i:i+4]))
+	}
+
+	return &box
+}
--- a/internal/sniff/image.go
+++ b/internal/sniff/image.go
@ -0,0 +1,30 @@
+package sniff
+
+// ref: https://mimesniff.spec.whatwg.org
+var imageMIMEs = map[string]Sniffer{
+	"image/jpeg": prefixSniffer{0xFF, 0xD8, 0xFF},
+	"image/png":  prefixSniffer{0x89, 'P', 'N', 'G', '\r', '\n', 0x1A, '\n'},
+	"image/bmp":  prefixSniffer("BM"),
+	"image/webp": prefixSniffer("RIFF"),
+	"image/gif":  prefixSniffer("GIF8"),
+}
+
+// ImageMIME sniffs the well-known image types, and returns its MIME.
+func ImageMIME(header []byte) (string, bool) {
+	for ext, sniffer := range imageMIMEs {
+		if sniffer.Sniff(header) {
+			return ext, true
+		}
+	}
+	return "", false
+}
+
+// ImageExtension is equivalent to ImageMIME, but returns file extension
+func ImageExtension(header []byte) (string, bool) {
+	ext, ok := ImageMIME(header)
+	if !ok {
+		return "", false
+	}
+	// todo: use mime.ExtensionsByType
+	return "." + ext[6:], true // "image/" is 6 bytes
+}
--- a/internal/utils/temp.go
+++ b/internal/utils/temp.go
@ -0,0 +1,24 @@
+package utils
+
+import (
+	"fmt"
+	"io"
+	"os"
+)
+
+func WriteTempFile(rd io.Reader, ext string) (string, error) {
+	audioFile, err := os.CreateTemp("", "*"+ext)
+	if err != nil {
+		return "", fmt.Errorf("ffmpeg create temp file: %w", err)
+	}
+
+	if _, err := io.Copy(audioFile, rd); err != nil {
+		return "", fmt.Errorf("ffmpeg write temp file: %w", err)
+	}
+
+	if err := audioFile.Close(); err != nil {
+		return "", fmt.Errorf("ffmpeg close temp file: %w", err)
+	}
+
+	return audioFile.Name(), nil
+}
Author	SHA1	Message	Date
鲁树人	28ca8cef60	docs: update readme about go version and how to build from source All checks were successful continuous-integration/drone/push Build is passing Details	2024-11-22 00:57:09 +09:00
鲁树人	2b0bd2985e	chore: bump golang and dependency version All checks were successful continuous-integration/drone/push Build is passing Details	2024-11-22 00:50:52 +09:00
鲁树人	72ace9fc62	chore: bump version to v0.2.11 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-11-05 16:56:40 +09:00
鲁树人	074e4f874f	fix #108 : rel path resolution in windows All checks were successful continuous-integration/drone/push Build is passing Details	2024-11-05 16:27:14 +09:00
鲁树人	2bfb5ffddf	chore: bump version to v0.2.10 All checks were successful continuous-integration/drone/tag Build is passing Details continuous-integration/drone/push Build is passing Details	2024-11-04 14:25:02 +09:00
鲁树人	2c9de7c56c	fix #107 : windows dnd path error	2024-11-04 14:24:32 +09:00
鲁树人	b374c11c86	chore: bump app version to v0.2.9 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-11-02 13:59:22 +09:00
鲁树人	6493b2c5fc	fix #78 : skip parsing cover art if image is unsupported All checks were successful continuous-integration/drone/push Build is passing Details	2024-11-02 13:49:40 +09:00
鲁树人	f753b9c67d	fix #78 #106 : app crash due to imcompatible ncm metadata json	2024-11-02 13:44:29 +09:00
鲁树人	8829a3b3ba	refactor: rework on logging	2024-11-02 13:43:56 +09:00
鲁树人	b2ef27761f	chore: bump version to v0.2.8 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-10-25 23:03:34 +09:00
鲁树人	7f7cb66fe5	fix #103 : incorrect output path when input is a single file All checks were successful continuous-integration/drone/push Build is passing Details	2024-10-25 23:02:32 +09:00
鲁树人	77729cf653	chore: bump version to v0.2.7 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-10-21 08:45:09 +09:00
鲁树人	b317b89ae9	ci: append version number to file name, fix `tar.gz.gz` archive.	2024-10-21 08:45:09 +09:00
鲁树人	89b629304e	chore: bump version to v0.2.6 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-10-21 07:30:22 +09:00
鲁树人	c0c3bda9ce	ci: add windows arm64 build	2024-10-21 07:29:52 +09:00
鲁树人	fa8f7a1565	chore: bump version to v0.2.5 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-10-21 06:23:17 +09:00
鲁树人	d4d5e5ddf4	ci: upload zip for windows build All checks were successful continuous-integration/drone/push Build is passing Details	2024-10-21 06:10:36 +09:00
鲁树人	57c1aa3e54	ci: produce zip for windows build Some checks failed continuous-integration/drone/push Build is failing Details	2024-10-21 06:04:54 +09:00
鲁树人	b0998d8c8a	docs: document steps to update CI pipeline	2024-10-21 06:02:31 +09:00
鲁树人	f819726f3e	chore: bump version to v0.2.4 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-10-21 03:59:52 +09:00
鲁树人	fbad7ec450	fix #102 : support multi-part kgm extensions (kgm.flac/vpr.flac)	2024-10-21 03:58:21 +09:00
鲁树人	19bc6c466e	refactor: allow multi-part extensions (#102 )	2024-10-21 03:57:56 +09:00
鲁树人	b9e2a38f82	fix: do not throw error when file already exists	2024-10-21 03:56:52 +09:00
鲁树人	673ea8491f	docs: add do not fork notice All checks were successful continuous-integration/drone/push Build is passing Details	2024-10-13 05:45:25 +09:00
鲁树人	0d071a82be	feat #99 : support recursive `processDir` All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-10-08 22:20:12 +01:00
鲁树人	b8e6196248	chore: bump version to 0.2.3 All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2024-10-08 22:10:15 +01:00
鲁树人	1323fb9e1a	Merge pull request '修正 #59 #99 转换后移除原始文件处理' (#100 ) from fix-59-99-remove-source into main All checks were successful continuous-integration/drone/push Build is passing Details Reviewed-on: #100	2024-10-08 21:06:44 +00:00
鲁树人	36df203bdd	fix: record last error when calling `processDir` Some checks failed continuous-integration/drone/push Build is failing Details	2024-10-08 22:03:29 +01:00
鲁树人	2afc232eb1	fix: don't force exit when `processFile` fails.	2024-10-08 21:59:47 +01:00
鲁树人	2abdd47c9c	fix: typo	2024-10-08 21:59:27 +01:00
鲁树人	8b59bc026d	chore: ignore exe files	2024-10-08 21:59:19 +01:00
鲁树人	91855f8f5b	fix #99 : default output dir to where the input file is All checks were successful continuous-integration/drone/push Build is passing Details	2024-10-08 21:52:23 +01:00
鲁树人	7edd326b95	fix #59 : processDir should call processFile instead.	2024-10-08 21:47:10 +01:00
鲁树人	0b3ad0d97c	chore: bump version All checks were successful continuous-integration/drone/tag Build is passing Details continuous-integration/drone/push Build is passing Details	2024-09-12 15:08:56 +01:00
鲁树人	c87204c78a	fix #96 : ncm file parsing when image cover 2 is not empty All checks were successful continuous-integration/drone/push Build is passing Details	2024-09-12 15:08:04 +01:00
鲁树人	3630fc0c78	Merge pull request '修正问题' (#95 ) from CLI-fix-59-71 into main All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details Reviewed-on: #95	2024-09-04 22:14:02 +00:00
鲁树人	b3f7cd33df	chore: update vulnerable deps All checks were successful continuous-integration/drone/push Build is passing Details	2024-09-04 23:09:43 +01:00
鲁树人	c6fa777db1	chore: bump version to v0.2.1 Some checks reported errors continuous-integration/drone/push Build was killed Details	2024-09-04 23:06:24 +01:00
鲁树人	cab705a130	fix: typo in qmc-mmkv flag description Some checks reported errors continuous-integration/drone/push Build was killed Details	2024-09-04 23:03:35 +01:00
鲁树人	f258e3e8f2	fix: remove file after completion #59 All checks were successful continuous-integration/drone/push Build is passing Details	2024-09-04 22:58:11 +01:00
鲁树人	59f3759d48	fix: add more extensions (Mac) #71	2024-09-04 22:47:02 +01:00
鲁树人	db547002f9	chore: update go-mmkv module hash All checks were successful continuous-integration/drone/push Build is passing Details	2024-09-01 19:09:34 +01:00
鲁树人	05a1affa03	Merge pull request '小更改 - mmkv 相关' (#93 ) from qmc-mmkv-cipher into master All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details Reviewed-on: #93	2024-07-06 19:35:06 +00:00
鲁树人	68e0c06246	refactor: rework on MusicEx footer parser	2024-07-06 20:32:26 +01:00
鲁树人	e010d1b308	refactor: make mmkv key optional; change cli params name	2024-07-06 19:55:31 +01:00
鲁树人	9b4e3b87ef	Merge remote-tracking branch 'awalol/master'	2024-07-06 19:45:10 +01:00
鲁树人	1ccc507f61	Merge pull request 'fix: wrong png header' (#91 ) from awalol/cli:fix-png into master Reviewed-on: #91	2024-05-03 08:47:13 +00:00
awalol	119a8cf380	fix: wrong png header	2024-05-03 16:17:32 +08:00
Unlock Music Dev	6179bcf0c7	Merge pull request 'Build: fix CI building' (#90 ) from build/fix-ci into master Reviewed-on: #90	2024-04-24 09:28:29 +00:00
Unlock Music Dev	c9ed772ce0	chore: update deps	2024-04-24 17:14:06 +08:00
Unlock Music Dev	9c0acb794e	build: update ci settings	2024-04-24 17:11:40 +08:00
Unlock Music Dev	bda32bc53e	chore: update deps	2024-04-24 17:05:03 +08:00
Unlock Music Dev	3f6566f7a9	build: fix ci	2024-04-24 16:27:51 +08:00
awalol	1c5310ffae	一些修改	2024-02-14 16:59:05 +08:00
awalol	2941a9ac76	refactor: qmc musicex footer parser	2024-02-13 02:41:42 +08:00
awalol	1835f9852a	修改 shuffixBuf 匹配方法	2024-02-13 01:17:52 +08:00
awalol	4f4d8db3d5	refactor: load mmkv on startup	2024-02-13 00:58:13 +08:00
awalol	877f37f01e	feat: mmkv 加密数据库解析	2024-02-05 08:41:40 +08:00
鲁树人	7b12f61a97	Merge pull request 'FIX: another solution to PR #86 ' (#87 ) from NestorRay/cli_fix:fix into master Reviewed-on: #87	2024-01-30 22:50:46 +00:00
鲁树人	f6bc911125	Merge pull request 'FIX: CHANGE metadata INT into interface{}' (#86 ) from NestorRay/cli_fix:master into master Reviewed-on: #86	2024-01-28 11:07:53 +00:00
NestorRay	9ddbd5f702	DELETE not necessary MusicID,AlbumID etc.	2024-01-28 16:24:58 +08:00
NestorRay	d480c9a2f8	CHANGE metadata INT into interface{}	2024-01-28 13:06:30 +08:00
鲁树人	907fe4143b	Merge pull request 'NCM: MusicID 动态类型支持' (#85 ) from fix/ncm-metadata-musicid into master Reviewed-on: #85	2024-01-28 04:03:05 +00:00
鲁树人	4ad9a721f0	fix: dynamic music id type	2024-01-28 03:59:17 +00:00
Unlock Music Dev	1bbc707dcc	Merge pull request 'Feat: add watch & overwrite flag' (#55 ) from feat/cli-args into master All checks were successful continuous-integration/drone/push Build is passing Details Reviewed-on: #55	2022-12-25 12:30:38 +00:00
Unlock Music Dev	dfbb807e41	feat: add watch flag All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-25 20:23:59 +08:00
Unlock Music Dev	a928611a8d	feat: add overwrite flag All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-25 19:26:11 +08:00
Unlock Music Dev	2754c14fa6	Merge pull request 'fix: don't fatal while process dir' (#52 ) from fix/fatal-dir into master All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details Reviewed-on: #52	2022-12-09 10:17:59 +00:00
Unlock Music Dev	8858ff37ad	fix: don't fatal while process dir All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-09 18:15:40 +08:00
Unlock Music Dev	d0d9836990	doc: update go version [skip ci]	2022-12-07 02:02:50 +08:00
Unlock Music Dev	1a508fc2b6	doc: update readme All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-07 01:57:51 +08:00
Unlock Music Dev	0acf905d08	feat(meta): separate flac meta process All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details	2022-12-07 01:37:53 +08:00
Unlock Music Dev	f3cbd2f3b4	feat(meta): add main options All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-07 00:40:12 +08:00
Unlock Music Dev	fd6f830916	feat(meta): write album art & metadata into destination file	2022-12-06 23:55:43 +08:00
Unlock Music Dev	02e065aac4	feat(meta): add writing metadata by ffmpeg	2022-12-06 21:52:19 +08:00
Unlock Music Dev	8319df6ca3	chore: fix logging	2022-12-06 21:52:19 +08:00
Unlock Music Dev	3857ba91a6	feat(meta): allow read tags from streams	2022-12-06 21:52:18 +08:00
Unlock Music Dev	9856f52070	feat: add meta parser from filename	2022-12-06 21:52:18 +08:00
Unlock Music Dev	112d9ab28e	feat(qmc): allow retrieve metadata online	2022-12-06 21:52:18 +08:00
Unlock Music Dev	f60f0b3d07	feat(qmc): add search interface	2022-12-06 21:52:17 +08:00
Unlock Music Dev	3cf542c84c	feat(meta): use ffmpeg to retrieve album art & metadata	2022-12-06 21:52:17 +08:00
Unlock Music Dev	9494a535a9	feat(qmc): support audio meta getter	2022-12-06 21:52:16 +08:00
Unlock Music Dev	138adbf846	feat(ncm): support audio meta getter	2022-12-06 21:52:16 +08:00
Unlock Music Dev	c878bb8ca4	feat: add image sniffer	2022-12-06 21:52:16 +08:00
Unlock Music Dev	e9e63ce175	feat(qmc): improve m4a & mp4 sniff All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-06 21:47:33 +08:00
um-dev	2c378d4d46	Merge pull request 'feat(qmc): add mmp4 format' (#48 ) from feat/qmc-mmp4 into master All checks were successful continuous-integration/drone/push Build is passing Details Reviewed-on: #48	2022-12-06 10:57:46 +00:00
Unlock Music Dev	21eab14e6c	feat(qmc): add mmp4 format All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-06 18:42:58 +08:00
um-dev	0a0179c614	Merge pull request 'fix(qmc): use unicode normalize to match filename' (#47 ) from fix/unicode-norm into master All checks were successful continuous-integration/drone/push Build is passing Details continuous-integration/drone/tag Build is passing Details Reviewed-on: #47	2022-12-05 03:24:40 +00:00
Unlock Music Dev	12be881d42	chore: add accident removed comment All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-05 11:10:40 +08:00
Unlock Music Dev	6f033af336	chore: remove unused debug log All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-05 11:08:54 +08:00
Unlock Music Dev	79d00b356f	feat(qmc): use unicode normalize to match filename All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-05 11:04:57 +08:00
um-dev	f6149c9109	Merge pull request 'feat(qmc): add support for .mflach' (#46 ) from qmc/mflach into master All checks were successful continuous-integration/drone/push Build is passing Details Reviewed-on: #46	2022-12-05 02:03:42 +00:00
Unlock Music Dev	3739638ddf	feat(qmc): use editorial distance to find the key All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-05 09:43:33 +08:00
Unlock Music Dev	423767ba63	fix(qmc): fix key from mmkv All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-05 08:54:40 +08:00
Unlock Music Dev	a9c976f47d	Revert "fix(ci): add zlib for cgo" All checks were successful continuous-integration/drone/push Build is passing Details This reverts commit `743c672c44`.	2022-12-05 07:24:21 +08:00
Unlock Music Dev	5fbcdb77d4	fix(qmc): use pure go mmkv	2022-12-05 07:24:03 +08:00
Unlock Music Dev	743c672c44	fix(ci): add zlib for cgo Some checks failed continuous-integration/drone/push Build is failing Details	2022-12-05 01:00:00 +08:00
Unlock Music Dev	9241512f2d	feat(qmc): update go.mod Some checks failed continuous-integration/drone/push Build is failing Details	2022-12-05 00:09:48 +08:00
Unlock Music Dev	52e986e644	feat(qmc): support .mflach on darwin Some checks failed continuous-integration/drone/push Build is failing Details	2022-12-05 00:06:38 +08:00
Unlock Music Dev	d2019b04ec	fix: qmc test All checks were successful continuous-integration/drone/push Build is passing Details	2022-12-04 23:14:06 +08:00
Unlock Music Dev	ea3236e14b	refactor: change decoder init parameter Some checks failed continuous-integration/drone/push Build is failing Details	2022-12-04 23:05:38 +08:00
um-dev	ad64a0f91d	Merge pull request 'update readme [CI SKIP]' (#45 ) from update-readme into master Reviewed-on: #45	2022-11-27 02:31:32 +00:00
Unlock Music Dev	921f9b2ae6	update readme [CI SKIP]	2022-11-27 10:30:40 +08:00
um-dev	cb948e74df	Merge pull request 'Init Drone CI Build & Release' (#44 ) from ci/init-drone into master All checks were successful continuous-integration/drone/tag Build is passing Details continuous-integration/drone/push Build is passing Details Reviewed-on: #44	2022-11-26 23:54:20 +00:00
Unlock Music Dev	7637a91f71	ci: fix file exist All checks were successful continuous-integration/drone/push Build is passing Details	2022-11-27 07:50:04 +08:00
Unlock Music Dev	e7d360362e	ci: fix duplicated name Some checks failed continuous-integration/drone/push Build is failing Details	2022-11-27 07:47:42 +08:00
Unlock Music Dev	04320bd45a	ci: add release pipeline Some checks reported errors continuous-integration/drone/push Build encountered an error Details	2022-11-27 07:45:44 +08:00
Unlock Music Dev	26b580a4b8	ci: init with go build All checks were successful continuous-integration/drone/push Build is passing Details	2022-11-27 07:30:41 +08:00
Unlock Music Dev	6c168ee536	refactor: move audio sniffer to internal package	2022-11-22 06:16:40 +08:00
Unlock Music Dev	62a38d5ab4	fix(ximalaya): x2m scramble table loading	2022-11-21 13:30:48 +08:00