/src/FreeImage/Source/OpenEXR/IlmImf/ImfFramesPerSecond.h
C++ Header | 88 lines | 18 code | 9 blank | 61 comment | 0 complexity | ec0a89e82b219c9065e2d8abc1a9fe08 MD5 | raw file
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 25// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32// 33/////////////////////////////////////////////////////////////////////////// 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 70namespace Imf { 71 72inline Rational fps_23_976 () {return Rational (24000, 1001);} 73inline Rational fps_24 () {return Rational (24, 1);} 74inline Rational fps_25 () {return Rational (25, 1);} 75inline Rational fps_29_97 () {return Rational (30000, 1001);} 76inline Rational fps_30 () {return Rational (30, 1);} 77inline Rational fps_47_952 () {return Rational (48000, 1001);} 78inline Rational fps_48 () {return Rational (48, 1);} 79inline Rational fps_50 () {return Rational (50, 1);} 80inline Rational fps_59_94 () {return Rational (60000, 1001);} 81inline Rational fps_60 () {return Rational (60, 1);} 82 83Rational guessExactFps (double fps); 84Rational guessExactFps (const Rational &fps); 85 86} // namespace Imf 87 88#endif