internal MetadataToVorbisCommentAdapter(MetadataDictionary metadata)
{
Contract.Requires(metadata != null);
var day = 0;
var month = 0;
var year = 0;
foreach (var item in metadata)
{
switch (item.Key)
{
case "Day":
day = int.Parse(item.Value, CultureInfo.InvariantCulture);
break;
case "Month":
month = int.Parse(item.Value, CultureInfo.InvariantCulture);
break;
case "Year":
year = int.Parse(item.Value, CultureInfo.InvariantCulture);
break;
default:
string mappedKey;
if (_map.TryGetValue(item.Key, out mappedKey))
{
this[mappedKey] = item.Value;
}
break;
}
}
// The date field should contain either a full date, or just the year:
if (day > 0 && month > 0 && year > 0)
{
Contract.Assume(month <= 12);
this["DATE"] = new DateTime(year, month, day).ToShortDateString();
}
else if (year > 0)
{
this["DATE"] = year.ToString(CultureInfo.InvariantCulture);
}
if (metadata.CoverArt != null)
{
this["METADATA_BLOCK_PICTURE"] = new MetadataBlockPicture(metadata.CoverArt).ToString();
}
}
internal VorbisCommentToMetadataAdapter(VorbisComment vorbisComment)
{
var commentLengths = new int[vorbisComment.Comments];
Marshal.Copy(vorbisComment.CommentLengths, commentLengths, 0, commentLengths.Length);
var commentPtrs = new IntPtr[vorbisComment.Comments];
Marshal.Copy(vorbisComment.UserComments, commentPtrs, 0, commentPtrs.Length);
for (var i = 0; i < vorbisComment.Comments; i++)
{
var commentBytes = new byte[commentLengths[i]];
Marshal.Copy(commentPtrs[i], commentBytes, 0, commentLengths[i]);
string[] comment = Encoding.UTF8.GetString(commentBytes).Split(new[] { '=' }, 2);
Contract.Assert(comment.Length == 2);
// The track number and count may be packed into the same comment:
switch (comment[0])
{
case "TRACKNUMBER":
string[] segments = comment[1].Split('/');
base["TrackNumber"] = segments[0];
if (segments.Length > 1)
{
base["TrackCount"] = segments[1];
}
break;
case "DATE":
case "YEAR":
// The DATE comment may contain a full date, or only the year:
DateTime result;
if (DateTime.TryParse(comment[1], CultureInfo.CurrentCulture,
DateTimeStyles.NoCurrentDateDefault, out result) && result.Year >= 1000)
{
base["Day"] = result.Day.ToString(CultureInfo.InvariantCulture);
base["Month"] = result.Month.ToString(CultureInfo.InvariantCulture);
base["Year"] = result.Year.ToString(CultureInfo.InvariantCulture);
}
else
{
base["Year"] = comment[1];
}
break;
case "METADATA_BLOCK_PICTURE":
var picture = new MetadataBlockPicture(comment[1]);
if (picture.Type == PictureType.CoverFront || picture.Type == PictureType.Other)
{
try
{
CoverArt = new CoverArt(picture.Data);
}
catch (UnsupportedCoverArtException)
{ }
}
break;
case "COVERART":
try
{
// Deprecated way to store cover art:
CoverArt = new CoverArt(Convert.FromBase64String(comment[1]));
}
catch (UnsupportedCoverArtException)
{ }
break;
default:
string mappedKey;
if (_map.TryGetValue(comment[0], out mappedKey))
{
base[mappedKey] = comment[1];
}
break;
}
}
}
