100 lines
2.0 KiB
Go
100 lines
2.0 KiB
Go
// Copyright 2015, David Howden
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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/*
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The tag tool reads metadata from media files (as supported by the tag library).
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*/
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package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"os"
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"github.com/dhowden/tag"
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"github.com/dhowden/tag/mbz"
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)
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var usage = func() {
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fmt.Fprintf(os.Stderr, "usage: %s [optional flags] filename\n", os.Args[0])
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flag.PrintDefaults()
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}
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var (
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raw = flag.Bool("raw", false, "show raw tag data")
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extractMBZ = flag.Bool("mbz", false, "extract MusicBrainz tag data (if available)")
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)
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func main() {
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flag.Usage = usage
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flag.Parse()
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if flag.NArg() != 1 {
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usage()
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return
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}
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f, err := os.Open(flag.Arg(0))
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if err != nil {
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fmt.Printf("error loading file: %v", err)
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return
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}
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defer f.Close()
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m, err := tag.ReadFrom(f)
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if err != nil {
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fmt.Printf("error reading file: %v\n", err)
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return
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}
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printMetadata(m)
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if *raw {
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fmt.Println()
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fmt.Println()
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tags := m.Raw()
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for k, v := range tags {
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if _, ok := v.(*tag.Picture); ok {
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fmt.Printf("%#v: %v\n", k, v)
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continue
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}
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fmt.Printf("%#v: %#v\n", k, v)
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}
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}
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if *extractMBZ {
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b, err := json.MarshalIndent(mbz.Extract(m), "", " ")
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if err != nil {
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fmt.Printf("error marshalling MusicBrainz info: %v\n", err)
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return
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}
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fmt.Printf("\nMusicBrainz Info:\n%v\n", string(b))
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}
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}
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func printMetadata(m tag.Metadata) {
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fmt.Printf("Metadata Format: %v\n", m.Format())
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fmt.Printf("File Type: %v\n", m.FileType())
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fmt.Printf(" Title: %v\n", m.Title())
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fmt.Printf(" Album: %v\n", m.Album())
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fmt.Printf(" Artist: %v\n", m.Artist())
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fmt.Printf(" Composer: %v\n", m.Composer())
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fmt.Printf(" Genre: %v\n", m.Genre())
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fmt.Printf(" Year: %v\n", m.Year())
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track, trackCount := m.Track()
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fmt.Printf(" Track: %v of %v\n", track, trackCount)
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disc, discCount := m.Disc()
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fmt.Printf(" Disc: %v of %v\n", disc, discCount)
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fmt.Printf(" Picture: %v\n", m.Picture())
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fmt.Printf(" Lyrics: %v\n", m.Lyrics())
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fmt.Printf(" Comment: %v\n", m.Comment())
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}
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