The main work is based upon mpeg_play 2.0, which is 

 Copyright (c) 1992 The Regents of the University of California.
 All rights reserved.  

 Permission to use, copy, modify, and distribute this software and its
 documentation for any purpose, without fee, and without written agreement is
 hereby granted, provided that the above copyright notice and the following
 two paragraphs appear in all copies of this software.

 IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR
 DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
 OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
 CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
 ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
 PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.


The idct algorithm is loosely based upon jrevdct.c, which is 

 Copyright (C) 1991, 1992, Thomas G. Lane.
 This file is part of the Independent JPEG Group's software.
 For conditions of distribution and use, see the accompanying README file.

 This implementation is based on an algorithm described in
   C. Loeffler, A. Ligtenberg and G. Moschytz, "Practical Fast 1-D DCT
   Algorithms with 11 Multiplications", Proc. Int'l. Conf. on Acoustics,
   Speech, and Signal Processing 1989 (ICASSP '89), pp. 988-991.