/// <summary>
/// Retrieves tags/header from a channel
/// </summary>
/// <param name="handle">The channel handle</param>
/// <param name="flags">The tags/header wanted, on of BASSTagFlags</param>
/// <returns>If successful, requested tags are returned, else null is returned</returns>
public static BASS_TAG BASS_ChannelGetTags(UInt32 handle, BASSTagFlags flags)
{
BASS_TAG tags = null;
switch (flags)
{
case BASSTagFlags.BASS_TAG_ID3:
{
var tmp =
(TAG_ID3)Marshal.PtrToStructure(BASS_ChannelGetTagsP(handle, flags), typeof(TAG_ID3));
if (tmp == null)
{
return(new BASS_TAG());
}
tags = new BASS_TAG();
if (tmp.comment[28] == (char)0)
{
// if 29 byte of comment is null ('\0') then 30 byte of comment string is track nomber
tags.TrackNo = tmp.comment[29];
tmp.comment[29] = (char)0;
}
tags.Album = new string(tmp.album).Replace("\0", "").Trim();
tags.Artist = new string(tmp.artist).Replace("\0", "").Trim();
tags.Comment = new string(tmp.comment).Replace("\0", "").Trim();
if (tmp.genre > 147)
{
tags.Genre = tags.BASS_TAG_GENRE[147];
}
else
{
tags.Genre = tags.BASS_TAG_GENRE[tmp.genre];
}
tags.Title = new string(tmp.title).Replace("\0", "").Trim();
tags.Year = new string(tmp.year).Replace("\0", "").Trim();
break;
}
case BASSTagFlags.BASS_TAG_ID3V2:
{
IntPtr ptr = BASS_ChannelGetTagsP(handle, flags);
if (ptr == IntPtr.Zero)
{
tags = BASS_ChannelGetTags(handle, BASSTagFlags.BASS_TAG_ID3);
break;
}
if (Marshal.PtrToStringAnsi(ptr, 3) == "ID3")
{
var version = new byte[2]
{
Marshal.ReadByte(ptr, 3),
Marshal.ReadByte(ptr, 4)
};
byte fl = Marshal.ReadByte(ptr, 5);
int size = (new byte[4]
{
Marshal.ReadByte(ptr, 6),
Marshal.ReadByte(ptr, 7),
Marshal.ReadByte(ptr, 8),
Marshal.ReadByte(ptr, 9)
}).FromSynchsafeInt2Int();
int i = 10;
tags = new BASS_TAG();
while (true)
{
string frameId = string.Format("{0}{1}{2}{3}", (char)Marshal.ReadByte(ptr, i),
(char)Marshal.ReadByte(ptr, i + 1),
(char)Marshal.ReadByte(ptr, i + 2),
(char)Marshal.ReadByte(ptr, i + 3));
int frameSize =
(new byte[4]
{
Marshal.ReadByte(ptr, i + 4), Marshal.ReadByte(ptr, i + 5),
Marshal.ReadByte(ptr, i + 6), Marshal.ReadByte(ptr, i + 7)
})
.FromSynchsafeInt2Int();
var frameFlags = new byte[2]
{
Marshal.ReadByte(ptr, i + 8), Marshal.ReadByte(ptr, i + 9)
};
if (i + 10 + frameSize > size)
{
break;
}
byte frameEncoding = Marshal.ReadByte(ptr, i + 10);
var frameContent = new List <byte>();
i += 11;
if (frameId.Equals("COMM"))
{
i += 7;
}
var bomByteOrder = new byte[2] {
0, 0
};
if (frameEncoding == 1)
{
bomByteOrder = new byte[2] {
Marshal.ReadByte(ptr, i), Marshal.ReadByte(ptr, i + 1)
}
}
;
i += 2;
int j = i + frameSize - 3;
if (frameId.Equals("COMM"))
{
j -= 7;
}
while (i < j)
{
frameContent.Add(Marshal.ReadByte(ptr, i));
i++;
}
string tconntent = string.Empty;
if (frameEncoding == 0)
{
tconntent = Encoding.ASCII.GetString(frameContent.ToArray()).Replace('\0', ' ');
}
else if (frameEncoding == 1 && bomByteOrder[0] == 0xFF && bomByteOrder[1] == 0xFE)
{
tconntent = Encoding.Unicode.GetString(frameContent.ToArray()).Replace('\0', ' ');
}
else if (frameEncoding == 1 && bomByteOrder[0] == 0xFE && bomByteOrder[1] == 0xFF)
{
tconntent = Encoding.BigEndianUnicode.GetString(frameContent.ToArray())
.Replace('\0', ' ');
}
else if (frameEncoding == 2)
{
tconntent = Encoding.BigEndianUnicode.GetString(frameContent.ToArray())
.Replace('\0', ' ');
}
else if (frameEncoding == 3)
{
tconntent = Encoding.UTF8.GetString(frameContent.ToArray()).Replace('\0', ' ');
}
switch (frameId)
{
case "TALB":
{
tags.Album = tconntent;
break;
}
case "TOPE":
{
tags.Artist = tconntent;
break;
}
case "COMM":
{
tags.Comment = tconntent;
break;
}
case "TCON":
{
Match ma = Regex.Match(tconntent, @"\((?<num>[\d]+)\)");
if (ma.Groups["num"].Value != string.Empty)
{
int g = int.Parse(ma.Groups["num"].Value);
if (g > 147)
{
tags.Genre = tags.BASS_TAG_GENRE[147];
}
else
{
tags.Genre = tags.BASS_TAG_GENRE[g];
}
}
else
{
tags.Genre = tags.BASS_TAG_GENRE[147];
}
break;
}
case "TIT2":
{
tags.Title = tconntent;
break;
}
case "TRCK":
{
tags.TrackNo = int.Parse(tconntent);
break;
}
case "TYER":
{
tags.Year = tconntent;
break;
}
default:
break;
}
}
}
break;
}
case BASSTagFlags.BASS_TAG_OGG:
break;
case BASSTagFlags.BASS_TAG_HTTP:
break;
case BASSTagFlags.BASS_TAG_ICY:
break;
case BASSTagFlags.BASS_TAG_META:
break;
case BASSTagFlags.BASS_TAG_APE:
break;
case BASSTagFlags.BASS_TAG_MP4:
break;
case BASSTagFlags.BASS_TAG_VENDOR:
break;
case BASSTagFlags.BASS_TAG_LYRICS3:
break;
case BASSTagFlags.BASS_TAG_CA_CODEC:
break;
case BASSTagFlags.BASS_TAG_MF:
break;
case BASSTagFlags.BASS_TAG_WAVEFORMAT:
break;
case BASSTagFlags.BASS_TAG_RIFF_INFO:
break;
case BASSTagFlags.BASS_TAG_RIFF_BEXT:
break;
case BASSTagFlags.BASS_TAG_RIFF_CART:
break;
case BASSTagFlags.BASS_TAG_RIFF_DISP:
break;
case BASSTagFlags.BASS_TAG_APE_BINARY:
break;
case BASSTagFlags.BASS_TAG_MUSIC_NAME:
break;
case BASSTagFlags.BASS_TAG_MUSIC_MESSAGE:
break;
case BASSTagFlags.BASS_TAG_MUSIC_ORDERS:
break;
case BASSTagFlags.BASS_TAG_MUSIC_INST:
break;
case BASSTagFlags.BASS_TAG_MUSIC_SAMPLE:
break;
default:
break;
}
return(tags);
}
private static extern IntPtr BASS_ChannelGetTagsP(UInt32 handle, BASSTagFlags flags);