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:
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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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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;
45
46 namespace Imf {
47
48 Rational
guessExactFps(double fps)49 guessExactFps (double fps)
50 {
51 return guessExactFps (Rational (fps));
52 }
53
54
55 Rational
guessExactFps(const Rational & fps)56 guessExactFps (const Rational &fps)
57 {
58 const double e = 0.002;
59
60 if (abs (double (fps) - double (fps_23_976())) < e)
61 return fps_23_976();
62
63 if (abs (double (fps) - double (fps_29_97())) < e)
64 return fps_29_97();
65
66 if (abs (double (fps) - double (fps_47_952())) < e)
67 return fps_47_952();
68
69 if (abs (double (fps) - double (fps_59_94())) < e)
70 return fps_59_94();
71
72 return fps;
73 }
74
75 } // namespace Imf
76