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#include <stdlib.h>
#include <inttypes.h>
/* Macros for converting between various fixed-point representations and floating point. */
#define ONE_16 (1L << 16)
#define fixtof64(x) (float)((float)(x) / (float)(1 << 16)) //does not work on int64_t!
#define ftofix32(x) ((int32_t)((x) * (float)(1 << 16) + ((x) < 0 ? -0.5 : 0.5)))
#define ftofix31(x) ((int32_t)((x) * (float)(1 << 31) + ((x) < 0 ? -0.5 : 0.5)))
#define fix31tof64(x) (float)((float)(x) / (float)(1 << 31))
/* Fixed point math routines for use in atrac3.c */
inline int32_t fixmul16(int32_t x, int32_t y);
inline int32_t fixmul31(int32_t x, int32_t y);
inline int32_t fixdiv16(int32_t x, int32_t y);
inline int32_t fastSqrt(int32_t n);
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