1 ///////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
4 // Digital Ltd. LLC
5 //
6 // All rights reserved.
7 //
8 // Redistribution and use in source and binary forms, with or without
9 // modification, are permitted provided that the following conditions are
10 // met:
11 // * Redistributions of source code must retain the above copyright
12 // notice, this list of conditions and the following disclaimer.
13 // * Redistributions in binary form must reproduce the above
14 // copyright notice, this list of conditions and the following disclaimer
15 // in the documentation and/or other materials provided with the
16 // distribution.
17 // * Neither the name of Industrial Light & Magic nor the names of
18 // its contributors may be used to endorse or promote products derived
19 // from this software without specific prior written permission.
20 //
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 //
33 ///////////////////////////////////////////////////////////////////////////
34
35 //-----------------------------------------------------------------------------
36 //
37 // Convenience functions related to the framesPerSecond attribute
38 //
39 //-----------------------------------------------------------------------------
40
41 #include <ImfFramesPerSecond.h>
42 #include "ImathFun.h"
43
44 using namespace IMATH_NAMESPACE;
45 #include "ImfNamespace.h"
46
47 OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
48
49 Rational
guessExactFps(double fps)50 guessExactFps (double fps)
51 {
52 return guessExactFps (Rational (fps));
53 }
54
55
56 Rational
guessExactFps(const Rational & fps)57 guessExactFps (const Rational &fps)
58 {
59 const double e = 0.002;
60
61 if (abs (double (fps) - double (fps_23_976())) < e)
62 return fps_23_976();
63
64 if (abs (double (fps) - double (fps_29_97())) < e)
65 return fps_29_97();
66
67 if (abs (double (fps) - double (fps_47_952())) < e)
68 return fps_47_952();
69
70 if (abs (double (fps) - double (fps_59_94())) < e)
71 return fps_59_94();
72
73 return fps;
74 }
75
76 OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT
77