public bool TryRead(string filename, out Tag tag)
{
if (filename == null) throw new ArgumentNullException("filename");
try
{
var file = new File(filename);
LogWarnings(filename, file);
var t = new Tag();
PopulateFromTag(file, t);
PopulateFallbackValues(t);
if (file.Properties != null)
t.Duration = file.Properties.Duration;
tag = t;
return true;
}
catch (Exception e)
{
Log.Error(String.Format("Error reading M4A tag from {0}.", filename), e);
tag = null;
return false;
}
}
public void Clean(Tag tag)
{
if (tag == null) throw new ArgumentNullException("tag");
tag.Artist = Cleanup(tag.Artist);
tag.Title = Cleanup(tag.Title);
}
public Tag Read(string filename)
{
if (filename == null) throw new ArgumentNullException("filename");
var t = new Tag();
t.Title = Path.GetFileNameWithoutExtension(filename);
t.Artist = TrackDefaults.UnknownArtist;
t.Duration = GetDuration(filename);
return t;
}
void PopulateFromTag(File file, Tag tag)
{
//if (!file.TagTypes.HasFlag(TagTypes.Id3v2))
// return;
tag.ImageData = GetImageData(file);
// ID3v2 Tags Reference: http://id3.org/id3v2.4.0-frames
tag.Artist = JoinPerformers(file.Tag.Performers);
tag.Title = file.Tag.Title;
tag.Year = ToStringOrDefault(file.Tag.Year);
tag.Genre = file.Tag.JoinedGenres;
tag.Publisher = file.Tag.Grouping;
tag.Bpm = ToStringOrDefault(file.Tag.BeatsPerMinute);
}
void PopulateFallbackValues(Tag tag)
{
tag.Artist = tag.Artist ?? TrackDefaults.UnknownArtist;
tag.Title = tag.Title ?? TrackDefaults.UnknownTitle;
}
Track CreateTrackFromTag(string filename, Tag tag)
{
foreach (var cleanup in cleanupFactory.GetCleanups())
cleanup.Clean(tag);
string filenameKey;
string filenameBpm;
filenameParser.TryParse(filename, out filenameKey, out filenameBpm);
var strKey = StringUtils.Coalesce(tag.InitialKey, filenameKey);
var strBpm = StringUtils.Coalesce(tag.Bpm, filenameBpm);
HarmonicKey key = keyParser.ParseHarmonicKey(strKey);
double bpm;
if (!Double.TryParse(strBpm, out bpm))
bpm = double.NaN;
TrackImageData images =
tag.ImageData != null ? imageResizer.Process(tag.ImageData) : null;
var track = new Track(tag.Artist, tag.Title, key, filename, bpm, tag.Duration)
{
Label = tag.Publisher ?? "",
Genre = tag.Genre ?? "",
Year = tag.Year ?? "",
Images = images
};
return track;
}
