FreeCalypso > hg > gsm-codec-lib
diff libtwamr/log2.h @ 326:bfe74a9edd5a
libtwamr: integrate log2.c
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Thu, 18 Apr 2024 20:21:04 +0000 |
| parents | |
| children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libtwamr/log2.h Thu Apr 18 20:21:04 2024 +0000 @@ -0,0 +1,49 @@ +/* +******************************************************************************** +* +* GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 +* R99 Version 3.3.0 +* REL-4 Version 4.1.0 +* +******************************************************************************** +* +* 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