private void WriteDiscInfo(IntPtr tagsPtr, IntPtr discInfoPtr)
{
if (this.DiscNumber == null && this.TotalDiscs == null)
{
NativeMethods.MP4TagsSetDisk(tagsPtr, IntPtr.Zero);
}
else
{
NativeMethods.MP4TagDisk discInfo = new NativeMethods.MP4TagDisk();
if (discInfoPtr != IntPtr.Zero)
{
discInfoPtr.ReadStructure <NativeMethods.MP4TagDisk>();
}
if (this.DiscNumber.Value != discInfo.index || this.TotalDiscs != discInfo.total)
{
discInfo.index = (this.DiscNumber == null ? (short)0 : this.DiscNumber.Value);
discInfo.total = (this.TotalDiscs == null ? (short)0 : this.TotalDiscs.Value);
IntPtr discPtr = Marshal.AllocHGlobal(Marshal.SizeOf(discInfo));
Marshal.StructureToPtr(discInfo, discPtr, false);
NativeMethods.MP4TagsSetDisk(tagsPtr, discPtr);
Marshal.FreeHGlobal(discPtr);
}
}
}
private void ReadDiskInfo(IntPtr diskInfoPointer)
{
if (diskInfoPointer == IntPtr.Zero)
{
return;
}
NativeMethods.MP4TagDisk diskInfo = diskInfoPointer.ReadStructure <NativeMethods.MP4TagDisk>();
this.DiscNumber = diskInfo.index;
this.TotalDiscs = diskInfo.total;
}
