仠Ogg
Ogg, Vorbis, Xiph.org Foundation and their logos are trademarks (tm)
of the Xiph.org Foundation. YU-RIS uses their SDK, especially
ogg_static.lib vorbis_static.lib vorbisfile_static.lib.
These library are copyright (C) 1994-2001 Xiph.org. All rights reserved.
仠libpng
libpng (Guy Eric Schalnat, Andreas Dilger, Glenn Randers-Pehrson, and others)
http://www.libpng.org/pub/png/libpng.html
仠zlib
zlib 1.2.3 is a general purpose data compression library.
(C) 1995-2002 Jean-loup Gailly and Mark Adler
http://www.gzip.org/zlib/