internal unsafe VorbisCommentToMetadataAdapter(VorbisComment vorbisComment)
{
var commentPtrs = new Span <IntPtr>(vorbisComment.UserComments.ToPointer(), vorbisComment.Comments);
var commentLengths = new Span <int>(vorbisComment.CommentLengths.ToPointer(), vorbisComment.Comments);
for (var i = 0; i < vorbisComment.Comments; i++)
{
var commentBytes = new Span <byte>(commentPtrs[i].ToPointer(), commentLengths[i]);
var delimiter = commentBytes.IndexOf((byte)0x3D); // '='
#if NETSTANDARD2_0
var keyBytes = commentBytes.Slice(0, delimiter);
var key = Encoding.ASCII.GetString(
(byte *)Unsafe.AsPointer(ref MemoryMarshal.GetReference(keyBytes)),
keyBytes.Length);
if (key.Equals("METADATA_BLOCK_PICTURE", StringComparison.OrdinalIgnoreCase))
{
CoverArt = CoverArtAdapter.FromBase64(commentBytes.Slice(delimiter + 1));
}
else
{
var valueBytes = commentBytes.Slice(delimiter + 1);
SetText(key, Encoding.UTF8.GetString(
(byte *)Unsafe.AsPointer(ref MemoryMarshal.GetReference(valueBytes)),
valueBytes.Length));
}
#else
var key = Encoding.ASCII.GetString(commentBytes.Slice(0, delimiter));
if (key.Equals("METADATA_BLOCK_PICTURE", StringComparison.OrdinalIgnoreCase))
{
CoverArt = CoverArtAdapter.FromBase64(commentBytes[(delimiter + 1)..]);
internal MetadataToVorbisCommentAdapter([NotNull] AudioMetadata metadata)
{
SafeNativeMethods.VorbisCommentInit(out _comment);
if (!string.IsNullOrEmpty(metadata.Title))
{
AddTag("TITLE", metadata.Title);
}
if (!string.IsNullOrEmpty(metadata.Artist))
{
AddTag("ARTIST", metadata.Artist);
}
if (!string.IsNullOrEmpty(metadata.Album))
{
AddTag("ALBUM", metadata.Album);
}
if (!string.IsNullOrEmpty(metadata.AlbumArtist))
{
AddTag("ALBUMARTIST", metadata.AlbumArtist);
}
if (!string.IsNullOrEmpty(metadata.Composer))
{
AddTag("COMPOSER", metadata.Composer);
}
if (!string.IsNullOrEmpty(metadata.Genre))
{
AddTag("GENRE", metadata.Genre);
}
if (!string.IsNullOrEmpty(metadata.Comment))
{
AddTag("DESCRIPTION", metadata.Comment);
}
if (!string.IsNullOrEmpty(metadata.Day) &&
!string.IsNullOrEmpty(metadata.Month) &&
!string.IsNullOrEmpty(metadata.Year))
{
AddTag("DATE", $"{metadata.Year}-{metadata.Month}-{metadata.Day}");
}
else if (!string.IsNullOrEmpty(metadata.Year))
{
AddTag("YEAR", metadata.Year);
}
if (!string.IsNullOrEmpty(metadata.TrackNumber))
{
AddTag("TRACKNUMBER", !string.IsNullOrEmpty(metadata.TrackCount)
? $"{metadata.TrackNumber}/{metadata.TrackCount}"
: metadata.TrackNumber);
}
if (!string.IsNullOrEmpty(metadata.TrackPeak))
{
AddTag("REPLAYGAIN_TRACK_PEAK", metadata.TrackPeak);
}
if (!string.IsNullOrEmpty(metadata.AlbumPeak))
{
AddTag("REPLAYGAIN_ALBUM_PEAK", metadata.AlbumPeak);
}
if (!string.IsNullOrEmpty(metadata.TrackGain))
{
AddTag("REPLAYGAIN_TRACK_GAIN", $"{metadata.TrackGain} dB");
}
if (!string.IsNullOrEmpty(metadata.AlbumGain))
{
AddTag("REPLAYGAIN_ALBUM_GAIN", $"{metadata.AlbumGain} dB");
}
// Always store images in JPEG format since Vorbis is also lossy
if (metadata.CoverArt != null)
{
AddTag("METADATA_BLOCK_PICTURE", CoverArtAdapter.ToBase64(
CoverArtFactory.ConvertToLossy(metadata.CoverArt)));
}
}