void Parse()
{
var encoding = (ID3v2EncodingType)m_Content[0];
int index = 1 + ID3v2Encoding.Parse(0, m_Content, 1, out m_MimeType);
m_PictureType = (ID3v2PictureType)m_Content[index++];
index += ID3v2Encoding.Parse(encoding, m_Content, index, out m_Description);
m_ImageDataStart = index;
}
void Parse()
{
var encoding = (ID3v2EncodingType)Content[0];
var index = 1 + ID3v2Encoding.Parse(0, Content, 1, out mimeType);
pictureType = (ID3v2PictureType)Content[index++];
index += ID3v2Encoding.Parse(encoding, Content, index, out description);
imageDataStart = index;
}
/// <summary>Gets the picture frame with the specified type.</summary>
/// <param name="type">The type.</param>
/// <returns></returns>
public ID3v2APICFrame GetPictureFrame(ID3v2PictureType type)
{
foreach (var frame in GetFrames <ID3v2APICFrame>("APIC"))
{
if (frame.PictureType == type)
{
return(frame);
}
}
return(null);
}
/// <summary>Creates the specified header.</summary>
/// <param name="header">The header.</param>
/// <param name="flags">The flags.</param>
/// <param name="description">The description.</param>
/// <param name="type">The type.</param>
/// <param name="mimeType">Type of the MIME.</param>
/// <param name="imageData">The image data.</param>
/// <returns></returns>
/// <exception cref="NotSupportedException"></exception>
public static ID3v2APICFrame Create(ID3v2Header header, ID3v2FrameFlags flags, string description, ID3v2PictureType type, string mimeType, byte[] imageData)
{
ID3v2EncodingType encoding = ID3v2Encoding.Select(header, description + mimeType);
// header, encoding[1], mimeType+0, pitureType[1], description+0, data
byte[] descriptionBytes = ID3v2Encoding.GetBytes(encoding, description, true);
byte[] mimeTypeBytes = ID3v2Encoding.GetBytes(encoding, mimeType, true);
int contentSize = descriptionBytes.Length + mimeTypeBytes.Length + 1 + 1 + imageData.Length;
var frameHeader = ID3v2FrameHeader.Create(header, "APIC", flags, contentSize);
using (var ms = new MemoryStream())
{
var writer = new DataWriter(ms);
writer.Write(frameHeader.Data);
writer.Write((byte)encoding);
writer.Write(mimeTypeBytes);
writer.Write((byte)type);
writer.Write(descriptionBytes);
writer.Write(imageData);
if (frameHeader.HeaderSize + contentSize != ms.Position)
{
throw new Exception();
}
return(new ID3v2APICFrame(new ID3v2Frame(header, ms.ToArray())));
}
}
/// <summary>
/// Creates a new header.
/// </summary>
/// <param name="header">The tag header.</param>
/// <param name="flags">The flags.</param>
/// <param name="description">The description.</param>
/// <param name="type">The type.</param>
/// <param name="image">The image.</param>
/// <param name="imageFormat">The image format.</param>
/// <param name="quality">The quality.</param>
/// <returns></returns>
/// <exception cref="ArgumentOutOfRangeException"></exception>
public static ID3v2APICFrame Create(ID3v2Header header, ID3v2FrameFlags flags, string description, ID3v2PictureType type,
SkiaSharp.SKImage image, SkiaSharp.SKEncodedImageFormat imageFormat = SkiaSharp.SKEncodedImageFormat.Jpeg, int quality = 99)
{
var data = image.Encode(imageFormat, quality);
string mimeType;
switch (imageFormat)
{
case SkiaSharp.SKEncodedImageFormat.Jpeg: mimeType = MimeTypes.FromExtension(".jpg"); break;
case SkiaSharp.SKEncodedImageFormat.Png: mimeType = MimeTypes.FromExtension(".png"); break;
default: throw new ArgumentOutOfRangeException(string.Format("ImageFormat {0} not suppoerted!", imageFormat));
}
return(Create(header, flags, description, type, mimeType, data.ToArray()));
}
