audiotagger

build status pub

This library allow you to read and write ID3 tags to MP3 files.

Library actually works only on Android.

Add dependency

dependencies:
  audiotagger: ^1.1.0

Audiotagger need access to read and write storage.
To do this you can use Permission Handler library.

Table of contents

Basic usage for any operation

Initialize a new instance of the tagger;

final tagger = new Audiotagger();

Reading operations

Read tags as map

You can get a Map of the ID3 tags.

void getTagsAsMap() async {
    final String filePath = "/storage/emulated/0/file.mp3";
    final Map map = await tagger.readTagsAsMap(
        path: filePath
    );
}

This method does not read the artwork of the song. To do this, use the readArtwork method.

The map has this schema:Tag schema.

Read tags as Tag object

You can get a Tag object of the ID3 tags.

void getTags() async {
    final String filePath = "/storage/emulated/0/file.mp3";
    final Tag tag = await tagger.readTags(
        path: filePath
    );
}

This method does not read the artwork of the song. To do this, use the readArtwork method.

The Tag object has this schema: Tag schema.

Read artwork

To get the artwork of the song, use this method.

void getArtwork() async {
    final String filePath = "/storage/emulated/0/file.mp3";
    final Uint8List bytes = await tagger.readArtwork(
        path: filePath
    );
}

It return a Uint8List of the bytes of the artwork.

Writing operations

Write tags from map

You can write the ID3 tags from a Map.
To reset a field, pass an empty string ("").
If the value is null, the field will be ignored and it will not be written.

void setTagsFromMap() async {
    final path = "storage/emulated/0/Music/test.mp3";
    final tags = <String, String>{
        "title": "Title of the song",
        "artist": "A fake artist",
        "album": "",    //This field will be reset
        "genre": null,  //This field will not be written
    };

    final result = await tagger.writeTagsFromMap(
        path: path,
        tags: tags
    );
}

The map has this schema:Tag schema.

Write tags from Tag object

You can write the ID3 tags from a Tag object.
To reset a field, pass an empty string ("").
If the value is null, the field will be ignored and it will not be written.

void setTags() async {
    final path = "storage/emulated/0/Music/test.mp3";
    final tag = Tag(
        title: "Title of the song",
        artist: "A fake artist",
        album: "",    //This field will be reset
        genre: null,  //This field will not be written
    );

    final result = await tagger.writeTags(
        path: path,
        tag: tag,
    );
}

The Tag object has this schema: Tag schema.

Write single tag field

You can write a single tag field by specifying the field name.
To reset the field, pass an empty string ("").
If the value is null, the field will be ignored and it will not be written. \

void setTags() async {
    final path = "storage/emulated/0/Music/test.mp3";

    final result = await tagger.writeTag(
        path: path,
        tagField: "title",
        value: "Title of the song"
    );
}

Refer to map of tags for fields name.

Models

These are the schemes of the Map asked and returned by Audiotagger and of the Tag class.

Map of tags

<String, String>{
    "title": value,
    "artist": value,
    "genre": value,
    "trackNumber": value,
    "trackTotal": value,
    "discNumber": value,
    "discTotal": value,
    "lyrics": value,
    "comment": value,
    "album": value,
    "albumArtist": value,
    "year": value,
    "artwork": value, // Null if obtained from readTags or readTagsAsMap
};

Tag class

    String title;
    String artist;
    String genre;
    String trackNumber;
    String trackTotal;
    String discNumber;
    String discTotal;
    String lyrics;
    String comment;
    String album;
    String albumArtist;
    String year;
    String artwork; // It represents the file path of the song artwork.

This library is developed and maintained by Nicolò Rebaioli
:globe_with_meridians: My website
:mailbox: niko.reba@gmail.com

Released under MIT license

Copyright 2019 Nicolò Rebaioli

Libraries

audiotagger
i18n
tag