private void WriteArtwork(IntPtr tagsPtr)
{
NativeMethods.MP4TagArtwork newArtwork = new NativeMethods.MP4TagArtwork();
MemoryStream stream = new MemoryStream();
this.artwork.Save(stream, this.ArtworkFormat);
byte[] artworkBytes = stream.ToArray();
newArtwork.data = Marshal.AllocHGlobal(artworkBytes.Length);
newArtwork.size = artworkBytes.Length;
Marshal.Copy(artworkBytes, 0, newArtwork.data, artworkBytes.Length);
if (this.ArtworkFormat.Equals(ImageFormat.Bmp))
{
newArtwork.type = NativeMethods.ArtworkType.Bmp;
}
else if (this.ArtworkFormat.Equals(ImageFormat.Jpeg))
{
newArtwork.type = NativeMethods.ArtworkType.Jpeg;
}
else if (this.ArtworkFormat.Equals(ImageFormat.Gif))
{
newArtwork.type = NativeMethods.ArtworkType.Gif;
}
else if (this.ArtworkFormat.Equals(ImageFormat.Png))
{
newArtwork.type = NativeMethods.ArtworkType.Png;
}
else
{
newArtwork.type = NativeMethods.ArtworkType.Undefined;
}
IntPtr newArtworkPtr = Marshal.AllocHGlobal(Marshal.SizeOf(newArtwork));
Marshal.StructureToPtr(newArtwork, newArtworkPtr, false);
if (this.ArtworkCount == 0)
{
NativeMethods.MP4TagsAddArtwork(tagsPtr, newArtworkPtr);
}
else
{
NativeMethods.MP4TagsSetArtwork(tagsPtr, 0, newArtworkPtr);
}
Marshal.FreeHGlobal(newArtwork.data);
Marshal.FreeHGlobal(newArtworkPtr);
}
private void ReadArtwork(IntPtr artworkStructurePointer)
{
if (artworkStructurePointer == IntPtr.Zero)
{
return;
}
NativeMethods.MP4TagArtwork artwork = artworkStructurePointer.ReadStructure <NativeMethods.MP4TagArtwork>();
byte[] artworkBuffer = new byte[artwork.size];
Marshal.Copy(artwork.data, artworkBuffer, 0, artwork.size);
this.artworkStream = new MemoryStream(artworkBuffer);
this.artwork = Image.FromStream(this.artworkStream);
switch (artwork.type)
{
case NativeMethods.ArtworkType.Bmp:
this.ArtworkFormat = ImageFormat.Bmp;
break;
case NativeMethods.ArtworkType.Gif:
this.ArtworkFormat = ImageFormat.Gif;
break;
case NativeMethods.ArtworkType.Jpeg:
this.ArtworkFormat = ImageFormat.Jpeg;
break;
case NativeMethods.ArtworkType.Png:
this.ArtworkFormat = ImageFormat.Png;
break;
default:
this.ArtworkFormat = ImageFormat.MemoryBmp;
break;
}
}
