///////////////////////////////////////////////////////////////////////////

//

// 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,

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// 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"

#include "ImfNamespace.h"

#include "ImfExport.h"

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_ENTER

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);}

IMF_EXPORT Rational	guessExactFps (double fps);

IMF_EXPORT Rational	guessExactFps (const Rational &fps;;

OPENEXR_IMF_INTERNAL_NAMESPACE_HEADER_EXIT

#endif