public async Task <string> saveArtwork(TagLib.Tag tag, int id)
{
IPicture picture = tag.Pictures[0];
ByteVector vector = picture.Data;
Byte[] bytes = vector.ToArray();
string extension = MimeTypesMap.GetExtension(picture.MimeType);
System.IO.Directory.CreateDirectory(System.IO.Path.Combine(App.LocalStoragePath, "AlbumArt"));
var filename = System.IO.Path.Combine(App.LocalStoragePath, "AlbumArt", id.ToString() + "." + extension);
System.IO.File.WriteAllBytes(filename, bytes);
return(id.ToString() + "." + extension);
}
public static Bitmap GetImageFromByteArray(ByteVector objByteVector)
{
int width = 320;
int height = 240;
// Convert the Malmo ByteVector to a byteArray
byte[] byteArray = objByteVector.ToArray();
// Create a Bitmap
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format24bppRgb);
int pos = 0;
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
bmp.SetPixel(x, y, Color.FromArgb(byteArray[pos], byteArray[pos + 1], byteArray[pos + 2]));
pos += 3;
}
}
// Return the Bitmap
return(bmp);
}
// Constructor: byteVector v2 = new byteVector( v1 );
public ByteVector(ByteVector that) : base()
{
this.CopyFromArray(that.ToArray()); return;
}
//Additional info here http://gabriel.mp3-tech.org/mp3infotag.html
//https://www.codeproject.com/Articles/8295/MPEG-Audio-Frame-Header
/// <summary>See if the mp3 file is encoded using VBR. Not sure what to do with ABR...
/// </summary>
private bool IsVBR()
{
bool bVBR = false;
if (currentFile.MimeType != "taglib/mp3")
{
return(false);
}
foreach (ICodec codec in currentFile.Properties.Codecs)
{
TagLib.Mpeg.AudioHeader header = (TagLib.Mpeg.AudioHeader)codec;
// if (header == null)
// return;
if (header.XingHeader.Present)
{
currentFile.Mode = TagLib.File.AccessMode.Read;
long XingHeader = currentFile.Find(TagLib.Mpeg.XingHeader.FileIdentifier);
long Offset = TagLib.Mpeg.XingHeader.XingHeaderOffset(header.Version, header.ChannelMode);
TagLib.Mpeg.XingHeader xing_header = TagLib.Mpeg.XingHeader.Unknown;
currentFile.Seek(XingHeader);// + Offset);
ByteVector xing_data = currentFile.ReadBlock(16);
if (xing_data.Count == 16 && xing_data.StartsWith(
TagLib.Mpeg.XingHeader.FileIdentifier))
{
xing_header = new TagLib.Mpeg.XingHeader(xing_data);
}
int Flags = BitConverter.ToInt32(xing_data.Take(8).ToArray().Reverse().ToArray(), 0);
bool FramesPresent = (Flags & 0x0001) > 0;
bool BytesPresent = (Flags & 0x0002) > 0;
bool TOCPresent = (Flags & 0x0004) > 0;
bool QualityPresent = (Flags & 0x0008) > 0;
long LameHeader = currentFile.Find(LAME_Identifier);
if (QualityPresent)
{
//Header offset + 8 (XING + flags) + Frames, Bytes and TOC if available
currentFile.Seek(XingHeader + 8 + 4 * (FramesPresent ? 1 : 0) + 4 * (BytesPresent ? 1 : 0) + 100 * (TOCPresent ? 1 : 0));
ByteVector Quality_data = currentFile.ReadBlock(4);
int VBRQuality = BitConverter.ToInt32(Quality_data.ToArray().Reverse().ToArray(), 0);
bVBR = true;
}
currentFile.Mode = TagLib.File.AccessMode.Closed;
// if (xing_header.Present)
// return false;
// var vector = new TagLib.ByteVector();
// TagLib.ByteVector xing = header.;
/* CODE HERE */
/* TagLib.File ref(fileName);
* TagLib.Mpeg.File *file = dynamic_cast<TagLib.Mpeg.File *>(ref file());
*
* if(!file)
* return;
*
* TagLib.Mpeg.Properties *properties = file->audioProperties();
* const TagLib::MPEG::XingHeader *xingHeader = properties->xingHeader();
*
* if(!xingHeader)
* return;
*/
}
if (header.VBRIHeader.Present)
{
/* CODE HERE */
}
}
return(bVBR);
}
