ref: 5164b5505f256c06eb3a84f4d8a8a93055af9d41
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