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ImfFramesPerSecond.h
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34 
35 
36 #ifndef INCLUDED_IMF_FRAMES_PER_SECOND_H
37 #define INCLUDED_IMF_FRAMES_PER_SECOND_H
38 
39 //-----------------------------------------------------------------------------
40 //
41 // Convenience functions related to the framesPerSecond attribute
42 //
43 // Functions that return the exact values for commonly used frame rates:
44 //
45 // name frames per second
46 //
47 // fps_23_976() 23.976023...
48 // fps_24() 24.0 35mm film frames
49 // fps_25() 25.0 PAL video frames
50 // fps_29_97() 29.970029... NTSC video frames
51 // fps_30() 30.0 60Hz HDTV frames
52 // fps_47_952() 47.952047...
53 // fps_48() 48.0
54 // fps_50() 50.0 PAL video fields
55 // fps_59_94() 59.940059... NTSC video fields
56 // fps_60() 60.0 60Hz HDTV fields
57 //
58 // Functions that try to convert inexact frame rates into exact ones:
59 //
60 // Given a frame rate, fps, that is close to one of the pre-defined
61 // frame rates fps_23_976(), fps_29_97(), fps_47_952() or fps_59_94(),
62 // guessExactFps(fps) returns the corresponding pre-defined frame
63 // rate. If fps is not close to one of the pre-defined frame rates,
64 // then guessExactFps(fps) returns Rational(fps).
65 //
66 //-----------------------------------------------------------------------------
67 
68 #include "ImfRational.h"
69 #include "ImfNamespace.h"
70 #include "ImfExport.h"
71 
72 
74 
75 
76 inline Rational fps_23_976 () {return Rational (24000, 1001);}
77 inline Rational fps_24 () {return Rational (24, 1);}
78 inline Rational fps_25 () {return Rational (25, 1);}
79 inline Rational fps_29_97 () {return Rational (30000, 1001);}
80 inline Rational fps_30 () {return Rational (30, 1);}
81 inline Rational fps_47_952 () {return Rational (48000, 1001);}
82 inline Rational fps_48 () {return Rational (48, 1);}
83 inline Rational fps_50 () {return Rational (50, 1);}
84 inline Rational fps_59_94 () {return Rational (60000, 1001);}
85 inline Rational fps_60 () {return Rational (60, 1);}
86 
87 IMF_EXPORT Rational guessExactFps (double fps);
89 
90 
92 
93 
94 #endif
Rational fps_29_97()
#define OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT
Definition: ImfNamespace.h:109
Rational fps_47_952()
Rational fps_59_94()
Rational fps_25()
OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER Rational fps_23_976()
Rational fps_50()
Rational fps_48()
Rational fps_60()
#define IMF_EXPORT
Definition: ImfExport.h:59
Rational fps_24()
Rational fps_30()
#define OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER
Definition: ImfNamespace.h:108
IMF_EXPORT Rational guessExactFps(double fps)