mirror of
https://github.com/opencv/opencv.git
synced 2024-12-26 10:48:12 +08:00
89 lines
3.7 KiB
C++
89 lines
3.7 KiB
C++
///////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Copyright (c) 2006, Industrial Light & Magic, a division of Lucas
|
|
// Digital Ltd. LLC
|
|
//
|
|
// All rights reserved.
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following disclaimer
|
|
// in the documentation and/or other materials provided with the
|
|
// distribution.
|
|
// * Neither the name of Industrial Light & Magic nor the names of
|
|
// its contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
//
|
|
///////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
#ifndef INCLUDED_IMF_FRAMES_PER_SECOND_H
|
|
#define INCLUDED_IMF_FRAMES_PER_SECOND_H
|
|
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Convenience functions related to the framesPerSecond attribute
|
|
//
|
|
// Functions that return the exact values for commonly used frame rates:
|
|
//
|
|
// name frames per second
|
|
//
|
|
// fps_23_976() 23.976023...
|
|
// fps_24() 24.0 35mm film frames
|
|
// fps_25() 25.0 PAL video frames
|
|
// fps_29_97() 29.970029... NTSC video frames
|
|
// fps_30() 30.0 60Hz HDTV frames
|
|
// fps_47_952() 47.952047...
|
|
// fps_48() 48.0
|
|
// fps_50() 50.0 PAL video fields
|
|
// fps_59_94() 59.940059... NTSC video fields
|
|
// fps_60() 60.0 60Hz HDTV fields
|
|
//
|
|
// Functions that try to convert inexact frame rates into exact ones:
|
|
//
|
|
// Given a frame rate, fps, that is close to one of the pre-defined
|
|
// frame rates fps_23_976(), fps_29_97(), fps_47_952() or fps_59_94(),
|
|
// guessExactFps(fps) returns the corresponding pre-defined frame
|
|
// rate. If fps is not close to one of the pre-defined frame rates,
|
|
// then guessExactFps(fps) returns Rational(fps).
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
|
|
#include <ImfRational.h>
|
|
|
|
namespace Imf {
|
|
|
|
inline Rational fps_23_976 () {return Rational (24000, 1001);}
|
|
inline Rational fps_24 () {return Rational (24, 1);}
|
|
inline Rational fps_25 () {return Rational (25, 1);}
|
|
inline Rational fps_29_97 () {return Rational (30000, 1001);}
|
|
inline Rational fps_30 () {return Rational (30, 1);}
|
|
inline Rational fps_47_952 () {return Rational (48000, 1001);}
|
|
inline Rational fps_48 () {return Rational (48, 1);}
|
|
inline Rational fps_50 () {return Rational (50, 1);}
|
|
inline Rational fps_59_94 () {return Rational (60000, 1001);}
|
|
inline Rational fps_60 () {return Rational (60, 1);}
|
|
|
|
Rational guessExactFps (double fps);
|
|
Rational guessExactFps (const Rational &fps);
|
|
|
|
} // namespace Imf
|
|
|
|
#endif
|