libdsm/COPYING

liBDSM is released under LGPLv2.1 (or later) and is also available
under a commercial license.

By contributing to this project, you allow VideoLabs to reship the
unmodified code under a commercial license.
You also allow VideoLAN and VideoLabs to relicense the project to a
different open source license, never more restrictive than the LGPL
(like a BSD/MIT/Apache license).

===

                  GNU LESSER GENERAL PUBLIC LICENSE
                       Version 2.1, February 1999

 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
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 the version number 2.1.]

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That's all there is to it!