PBRT
/home/felix/UBC/projects/AdaptiveLightfieldSampling/pbrt_v2/src/3rdparty/openexr-1.7.0/ImfFramesPerSecond.h
00001 
00002 //
00003 // Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
00004 // Digital Ltd. LLC
00005 // 
00006 // All rights reserved.
00007 // 
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are
00010 // met:
00011 // *       Redistributions of source code must retain the above copyright
00012 // notice, this list of conditions and the following disclaimer.
00013 // *       Redistributions in binary form must reproduce the above
00014 // copyright notice, this list of conditions and the following disclaimer
00015 // in the documentation and/or other materials provided with the
00016 // distribution.
00017 // *       Neither the name of Industrial Light & Magic nor the names of
00018 // its contributors may be used to endorse or promote products derived
00019 // from this software without specific prior written permission. 
00020 // 
00021 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00022 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00023 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00024 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
00025 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
00027 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00028 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00029 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00030 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00031 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 //
00034 
00035 
00036 #ifndef INCLUDED_IMF_FRAMES_PER_SECOND_H
00037 #define INCLUDED_IMF_FRAMES_PER_SECOND_H
00038 
00039 //-----------------------------------------------------------------------------
00040 //
00041 //      Convenience functions related to the framesPerSecond attribute
00042 //
00043 //      Functions that return the exact values for commonly used frame rates:
00044 //
00045 //          name                frames per second
00046 //
00047 //          fps_23_976()        23.976023...
00048 //          fps_24()            24.0            35mm film frames
00049 //          fps_25()            25.0            PAL video frames
00050 //          fps_29_97()         29.970029...    NTSC video frames
00051 //          fps_30()            30.0            60Hz HDTV frames
00052 //          fps_47_952()        47.952047...
00053 //          fps_48()            48.0
00054 //          fps_50()            50.0            PAL video fields
00055 //          fps_59_94()         59.940059...    NTSC video fields
00056 //          fps_60()            60.0            60Hz HDTV fields
00057 //
00058 //      Functions that try to convert inexact frame rates into exact ones:
00059 //
00060 //          Given a frame rate, fps, that is close to one of the pre-defined
00061 //          frame rates fps_23_976(), fps_29_97(), fps_47_952() or fps_59_94(),
00062 //          guessExactFps(fps) returns the corresponding pre-defined frame
00063 //          rate.  If fps is not close to one of the pre-defined frame rates,
00064 //          then guessExactFps(fps) returns Rational(fps).
00065 //
00066 //-----------------------------------------------------------------------------
00067 
00068 #include <ImfRational.h>
00069 
00070 namespace Imf {
00071 
00072 inline Rational fps_23_976 ()   {return Rational (24000, 1001);}
00073 inline Rational fps_24 ()       {return Rational (24, 1);}
00074 inline Rational fps_25 ()       {return Rational (25, 1);}
00075 inline Rational fps_29_97 ()    {return Rational (30000, 1001);}
00076 inline Rational fps_30 ()       {return Rational (30, 1);}
00077 inline Rational fps_47_952 ()   {return Rational (48000, 1001);}
00078 inline Rational fps_48 ()       {return Rational (48, 1);}
00079 inline Rational fps_50 ()       {return Rational (50, 1);}
00080 inline Rational fps_59_94 ()    {return Rational (60000, 1001);}
00081 inline Rational fps_60 ()       {return Rational (60, 1);}
00082 
00083 Rational        guessExactFps (double fps);
00084 Rational        guessExactFps (const Rational &fps);
00085 
00086 } // namespace Imf
00087 
00088 #endif