ntv2fixed.h File Reference

Declares several fixed-point math routines. Assumes 16-bit fraction. More...

#include "ajatypes.h"

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Macros
#define	FIXED_ONE   (1<<16)
#define	FixedTrunc(__x__)   ((__x__)>>16)
#define	FixedRound(__x__)   (((__x__) < 0) ? (-((-(__x__)+0x8000)>>16)) : (((__x__) + 0x8000)>>16))
#define	FixedMix(__min__, __max__, __mixer__)   (FixedRound(((__max__)-(__min__))*(__mixer__)+(__min__)))
#define	FloatToFixed(__x__)   ((Fixed_)((__x__) * (float)FIXED_ONE))
#define	FixedToFloat(__x__)   (((float)(__x__) / (float) 65536.0))
#define	FixedFrac(__x__)   (((__x__) < 0) ? (-(__x__) & 0xFFFF)) : ((__x__) & 0xFFFF)

Detailed Description

Declares several fixed-point math routines. Assumes 16-bit fraction.

Copyright

(C) 2004-2022 AJA Video Systems, Inc. All rights reserved.

Definition in file ntv2fixed.h.

Macro Definition Documentation

FIXED_ONE

#define FIXED_ONE   (1<<16)

Definition at line 13 of file ntv2fixed.h.

FixedFrac

#define FixedFrac

(

__x__

)

(((__x__) < 0) ? (-(__x__) & 0xFFFF)) : ((__x__) & 0xFFFF)

Definition at line 41 of file ntv2fixed.h.

FixedMix

#define FixedMix	(		__min__,
			__max__,
			__mixer__
	)		(FixedRound(((__max__)-(__min__))*(__mixer__)+(__min__)))

Definition at line 38 of file ntv2fixed.h.

FixedRound

#define FixedRound

(

__x__

)

(((__x__) < 0) ? (-((-(__x__)+0x8000)>>16)) : (((__x__) + 0x8000)>>16))

Definition at line 37 of file ntv2fixed.h.

FixedToFloat

#define FixedToFloat

(

__x__

)

(((float)(__x__) / (float) 65536.0))

Definition at line 40 of file ntv2fixed.h.

FixedTrunc

#define FixedTrunc

(

__x__

)

((__x__)>>16)

Definition at line 35 of file ntv2fixed.h.

FloatToFixed

#define FloatToFixed

(

__x__

)

((Fixed_)((__x__) * (float)FIXED_ONE))

Definition at line 39 of file ntv2fixed.h.