ref: 38464c2045ca581b2a5dfee895cabd683646f816
dir: /amr-wb/log2.h/
/********************************************************************************
*
* File : log2.h
* Purpose : Computes log2(L_x)
*
********************************************************************************
*/
#ifndef log2_h
#define log2_h "$Id $"
/*
********************************************************************************
* INCLUDE FILES
********************************************************************************
*/
#include "typedef.h"
/*
********************************************************************************
* DEFINITION OF DATA TYPES
********************************************************************************
*/
/*
********************************************************************************
* DECLARATION OF PROTOTYPES
********************************************************************************
*/
void Log2 (
Word32 L_x, /* (i) : input value */
Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */
Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1)*/
);
void Log2_norm (
Word32 L_x, /* (i) : input value (normalized) */
Word16 exp, /* (i) : norm_l (L_x) */
Word16 *exponent, /* (o) : Integer part of Log2. (range: 0<=val<=30) */
Word16 *fraction /* (o) : Fractional part of Log2. (range: 0<=val<1) */
);
#endif