miaosic/tag/reader_id3v2.go

package tag

import (
	"github.com/bogem/id3v2/v2"
	"io"
)

func ReadID3v2Tags(r io.ReadSeeker, mime string) (Metadata, error) {
	meta := Metadata{
		Mimetype: mime,
	}
	tags, err := id3v2.ParseReader(r, id3v2.Options{Parse: true})
	if err != nil {
		return meta, err
	}
	if tags.Version() == 3 {
		meta.Format = FormatID3v2_3
	}
	if tags.Version() == 4 {
		meta.Format = FormatID3v2_4
	}
	meta.Title = tags.Title()
	meta.Artist = tags.Artist()
	meta.Album = tags.Album()
	meta.Lyrics = make([]Lyrics, 0)
	for _, frame := range tags.GetFrames("USLT") {
		lyricFrame, ok := frame.(id3v2.UnsynchronisedLyricsFrame)
		if !ok {
			continue
		}
		meta.Lyrics = append(meta.Lyrics, Lyrics{
			Lang:   lyricFrame.Language,
			Lyrics: lyricFrame.Lyrics,
		})
	}
	meta.Pictures = make([]Picture, 0)
	for _, frame := range tags.GetFrames("APIC") {
		pic, ok := frame.(id3v2.PictureFrame)
		if !ok {
			continue
		}
		meta.Pictures = append(meta.Pictures, Picture{
			Mimetype:    pic.MimeType,
			Type:        pic.PictureType,
			Description: pic.Description,
			Data:        pic.Picture,
		})
	}
	return meta, nil
}