/// <summary>
/// Set an attribute specifying a stream number. Wraps IWMHeaderInfo.SetAttribute
/// </summary>
/// <param name="StreamNumber">Stream number. Zero for file level attributes.</param>
/// <param name="attr">Attribute to set. <see cref="Yeti.WMFSdk.WM_Attr"/></param>
public void SetAttribute(int StreamNumber, WM_Attr attr)
{
object obj;
ushort size;
switch (attr.DataType)
{
case WMT_ATTR_DATATYPE.WMT_TYPE_STRING:
byte[] arr = Encoding.Unicode.GetBytes((string)attr.Value + (char)0);
obj = arr;
size = (ushort)arr.Length;
break;
case WMT_ATTR_DATATYPE.WMT_TYPE_BOOL:
obj = (uint)((bool)attr?1:0);
size = 4;
break;
case WMT_ATTR_DATATYPE.WMT_TYPE_BINARY:
obj = (byte[])attr.Value;
size = (ushort)((byte[])obj).Length;
break;
case WMT_ATTR_DATATYPE.WMT_TYPE_DWORD:
obj = (uint)attr;
size = 4;
break;
case WMT_ATTR_DATATYPE.WMT_TYPE_QWORD:
obj = (ulong)attr;
size = 8;
break;
case WMT_ATTR_DATATYPE.WMT_TYPE_WORD:
obj = (ushort)attr;
size = 2;
break;
case WMT_ATTR_DATATYPE.WMT_TYPE_GUID:
obj = (Guid)attr;
size = (ushort)Marshal.SizeOf(typeof(Guid));
break;
default:
throw new ArgumentException("Invalid data type", "attr");
}
GCHandle h = GCHandle.Alloc(obj, GCHandleType.Pinned);
try
{
m_HeaderInfo.SetAttribute((ushort)StreamNumber, attr.Name, attr.DataType, h.AddrOfPinnedObject(), size);
}
finally
{
h.Free();
}
}
/// <summary>
/// Set file level attributes
/// </summary>
/// <param name="attr">Attribute to set <see cref="Yeti.WMFSdk.WM_Attr"/></param>
public void SetAttribute(WM_Attr attr)
{
SetAttribute(0, attr);
}