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mpeg_2_fractional.h
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505 lines (480 loc) · 10.9 KB
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/*
* mpeg_2_fractional.h
*
* Copyright 2014 Fernando Rodriguez (support@fernansoft.com).
* All rights reserved
*
*/
#ifndef MP3_FRACTIONAL_H
#define MP3_FRACTIONAL_H
/*
// 16 bit signed fractional type
*/
#if defined(__XC16__) || defined(__C30__)
typedef int mp3_frac;
#elif defined(__XC32__) || defined(_MSC_VER)
typedef short mp3_frac;
#elif __GNUC__
typedef short mp3_frac;
#else
#error "Fractional type not defined."
#endif
#define MP3_FRACBITS (14)
#define MP3_FRAC_MIN ((mp3_frac) -0x8000)
#define MP3_FRAC_MAX ((mp3_frac) +0x7fff)
#define MP3_FRAC_ONE ((mp3_frac) +0x4000)
#if (defined(__XC16__) || defined(__C30__))
#if 1
extern mp3_frac __result __attribute__((__near__));
#if 1
#pragma GCC diagnostic ignored "-Wvolatile-register-var"
#define MP3_FRAC_MUL(x, y) \
({ \
volatile register int _acc asm("A"); \
_acc = __builtin_mpy(x, y, 0, 0, 0, 0, 0, 0); \
__result = __builtin_sacr(_acc, MP3_FRACBITS - 16); \
__result; \
})
#else
#define MP3_FRAC_MUL(x, y) \
({ \
asm volatile \
( \
"mpy %1 * %2, b\n" \
"sac.r b, #%3,%0\n" \
/*"mov w5, %0"*/ \
: "=r" (__result) \
: "z" (x), "z" (y), "i" (MP3_FRACBITS - 16) \
: /*"w5",*/ \
); \
__result; \
})
#endif
/*
// these are no longer needed since all signal
// processing is done in assembly
*/
#define MP3_FRAC_MPY(x, y) __asm__("mpy %0 * %1, a\n" : : "z" (x), "z" (y))
#define MP3_FRAC_MAC(x, y) __asm__("mac %0 * %1, a\n" : : "z" (x), "z" (y))
#define MP3_FRAC_NEG() __asm__("neg a")
#define MP3_FRAC_SAC() \
({ \
__asm__ \
( \
"sac.r a, #%1, %0" \
: "=r" (__result) \
: "i" (MP3_FRACBITS - 16) \
); \
__result; \
})
#define MP3_FRAC_SAC_SHIFT(scale) \
({ \
__asm__ \
( \
"sac.r a, #%1, %0" \
: "=r" (__result) \
: "i" ((MP3_FRACBITS - 16) + scale) \
); \
__result; \
})
#else
#define ANSI_C
extern long acc;
#ifndef ANSI_C
#define MP3_FRAC_MUL(x, y) \
({ \
long _p = (long) (x) * (long) (y); \
_p >>= MP3_FRACBITS; \
if (_p > MP3_FRAC_MAX) \
{ \
_p = MP3_FRAC_MAX; \
} \
else if (_p < MP3_FRAC_MIN) \
{ \
_p = MP3_FRAC_MIN; \
} \
(mp3_frac) _p; \
})
#else
static inline mp3_frac MP3_FRAC_MUL(mp3_frac x, mp3_frac y)
{
long _p = (long) (x) * (long) (y);
_p >>= MP3_FRACBITS;
//if (_p > MP3_FRAC_MAX)
//{
// _p = MP3_FRAC_MAX;
//}
//else if (_p < MP3_FRAC_MIN)
//{
// _p = MP3_FRAC_MIN;
//}
return (mp3_frac) _p;
}
#endif
#define MP3_FRAC_MPY(x, y) acc = ((long) (x)) * ((long) (y))
#define MP3_FRAC_MAC(x, y) acc += ((long) (x)) * ((long) (y))
#define MP3_FRAC_NEG() acc = -acc
#ifndef ANSI_C
#define MP3_FRAC_SAC() \
({ \
acc >>= MP3_FRACBITS; \
if (acc > MP3_FRAC_MAX) \
{ \
acc = MP3_FRAC_MAX; \
} \
else if (acc < MP3_FRAC_MIN) \
{ \
acc = MP3_FRAC_MIN; \
} \
(mp3_frac) acc; \
})
#else
static inline mp3_frac MP3_FRAC_SAC()
{
acc >>= MP3_FRACBITS;
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return (mp3_frac) acc;
}
#endif
#ifndef ANSI_C
#define MP3_FRAC_SAC_SHIFT(scale) \
({ \
acc >>= (MP3_FRACBITS + scale); \
if (acc > MP3_FRAC_MAX) \
{ \
acc = MP3_FRAC_MAX; \
} \
else if (acc < MP3_FRAC_MIN) \
{ \
acc = MP3_FRAC_MIN; \
} \
(mp3_frac) acc; \
})
#else
static inline mp3_frac MP3_FRAC_SAC_SHIFT(int scale)
{
acc >>= (MP3_FRACBITS + scale);
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return (mp3_frac) acc;
}
#endif
#endif
#elif defined(__XC32__)
#if 1
static inline mp3_frac MP3_FRAC_MUL(mp3_frac x, mp3_frac y)
{
int _p = (int) x * (int) y;
_p += (1 << (MP3_FRACBITS - 1));
_p >>= MP3_FRACBITS;
//if (_p > MP3_FRAC_MAX)
//{
// _p = MP3_FRAC_MAX;
//}
//else if (_p < MP3_FRAC_MIN)
//{
// _p = MP3_FRAC_MIN;
//}
return (mp3_frac) _p;
}
extern long acc;
#define MP3_FRAC_MPY(x, y) ((acc) = MP3_FRAC_MUL((x), (y)))
#define MP3_FRAC_MAC(x, y) ((acc) += MP3_FRAC_MUL((x), (y)))
#define MP3_FRAC_NEG() ((acc) = -(acc))
static inline mp3_frac MP3_FRAC_SAC()
{
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return (mp3_frac) acc;
}
static inline MP3_FRAC_SAC_SHIFT(int scale)
{
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return ((mp3_frac) acc) << -scale;
}
#else
#define mp3_frac_long int
extern mp3_frac_long acc;
static inline mp3_frac MP3_FRAC_MUL(mp3_frac x, mp3_frac y)
{
mp3_frac_long _x = (mp3_frac_long) x;
mp3_frac_long _y = (mp3_frac_long) y;
mp3_frac_long _p = _x * _y;
_p >>= MP3_FRACBITS;
_p += (1 << (MP3_FRACBITS - 1));
/*
if (_p > MP3_FRAC_MAX)
{
_p = MP3_FRAC_MAX;
}
else if (_p < MP3_FRAC_MIN)
{
_p = MP3_FRAC_MIN;
}
*/
return (mp3_frac) _p;
}
#define MP3_FRAC_MPY(x, y) acc = ((mp3_frac_long) x) * ((mp3_frac_long) y)
#define MP3_FRAC_MAC(x, y) acc += ((mp3_frac_long) x) * ((mp3_frac_long) y)
#define MP3_FRAC_NEG() acc = -acc;
static inline mp3_frac MP3_FRAC_SAC()
{
acc += (1 << (MP3_FRACBITS - 1));
acc >>= MP3_FRACBITS;
/*
if (acc > MP3_FRAC_MAX)
{
acc = MP3_FRAC_MAX;
}
else if (acc < MP3_FRAC_MIN)
{
acc = MP3_FRAC_MIN;
}
*/
return (mp3_frac) acc;
}
static i mp3_frac MP3_FRAC_SAC_SHIFT(int scale)
{
acc += (1 << (MP3_FRACBITS - 1));
acc >>= (MP3_FRACBITS + scale);
/*
if (acc > MP3_FRAC_MAX)
{
acc = MP3_FRAC_MAX;
}
else if (acc < MP3_FRAC_MIN)
{
acc = MP3_FRAC_MIN;
}
*/
return (mp3_frac) acc;
}
#endif
#elif defined(_MSC_VER)
#if 1 && !defined(__GNUC__)
static __forceinline mp3_frac MP3_FRAC_MUL(mp3_frac x, mp3_frac y)
{
int _p = (int) x * (int) y;
_p += (1 << (MP3_FRACBITS - 1));
_p >>= MP3_FRACBITS;
//if (_p > MP3_FRAC_MAX)
//{
// _p = MP3_FRAC_MAX;
//}
//else if (_p < MP3_FRAC_MIN)
//{
// _p = MP3_FRAC_MIN;
//}
return (mp3_frac) _p;
}
extern __int64 acc;
#define MP3_FRAC_MPY(x, y) ((acc) = MP3_FRAC_MUL((x), (y)))
#define MP3_FRAC_MAC(x, y) ((acc) += MP3_FRAC_MUL((x), (y)))
#define MP3_FRAC_NEG() ((acc) = -(acc))
static __forceinline mp3_frac MP3_FRAC_SAC()
{
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return (mp3_frac) acc;
}
static __forceinline MP3_FRAC_SAC_SHIFT(int scale)
{
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return ((mp3_frac) acc) << -scale;
}
#else
#define mp3_frac_long __int32
extern __int32 acc;
static __forceinline mp3_frac MP3_FRAC_MUL(mp3_frac x, mp3_frac y)
{
mp3_frac_long _x = (mp3_frac_long) x;
mp3_frac_long _y = (mp3_frac_long) y;
mp3_frac_long _p = _x * _y;
_p >>= MP3_FRACBITS;
_p += (1 << (MP3_FRACBITS - 1));
/*
if (_p > MP3_FRAC_MAX)
{
_p = MP3_FRAC_MAX;
}
else if (_p < MP3_FRAC_MIN)
{
_p = MP3_FRAC_MIN;
}
*/
return (mp3_frac) _p;
}
#define MP3_FRAC_MPY(x, y) acc = ((mp3_frac_long) x) * ((mp3_frac_long) y)
#define MP3_FRAC_MAC(x, y) acc += ((mp3_frac_long) x) * ((mp3_frac_long) y)
#define MP3_FRAC_NEG() acc = -acc;
static __forceinline mp3_frac MP3_FRAC_SAC()
{
acc += (1 << (MP3_FRACBITS - 1));
acc >>= MP3_FRACBITS;
/*
if (acc > MP3_FRAC_MAX)
{
acc = MP3_FRAC_MAX;
}
else if (acc < MP3_FRAC_MIN)
{
acc = MP3_FRAC_MIN;
}
*/
return (mp3_frac) acc;
}
static __inline mp3_frac MP3_FRAC_SAC_SHIFT(int scale)
{
acc += (1 << (MP3_FRACBITS - 1));
acc >>= (MP3_FRACBITS + scale);
/*
if (acc > MP3_FRAC_MAX)
{
acc = MP3_FRAC_MAX;
}
else if (acc < MP3_FRAC_MIN)
{
acc = MP3_FRAC_MIN;
}
*/
return (mp3_frac) acc;
}
#endif
#elif defined(__GNUC__)
#define ANSI_C
extern long acc;
#ifndef ANSI_C
#define MP3_FRAC_MUL(x, y) \
({ \
long _p = (long) (x) * (long) (y); \
_p >>= MP3_FRACBITS; \
if (_p > MP3_FRAC_MAX) \
{ \
_p = MP3_FRAC_MAX; \
} \
else if (_p < MP3_FRAC_MIN) \
{ \
_p = MP3_FRAC_MIN; \
} \
(mp3_frac) _p; \
})
#else
static inline mp3_frac MP3_FRAC_MUL(mp3_frac x, mp3_frac y)
{
long _p = (long) (x) * (long) (y);
_p >>= MP3_FRACBITS;
//if (_p > MP3_FRAC_MAX)
//{
// _p = MP3_FRAC_MAX;
//}
//else if (_p < MP3_FRAC_MIN)
//{
// _p = MP3_FRAC_MIN;
//}
return (mp3_frac) _p;
}
#endif
#define MP3_FRAC_MPY(x, y) acc = ((long) (x)) * ((long) (y))
#define MP3_FRAC_MAC(x, y) acc += ((long) (x)) * ((long) (y))
#define MP3_FRAC_NEG() acc = -acc
#ifndef ANSI_C
#define MP3_FRAC_SAC() \
({ \
acc >>= MP3_FRACBITS; \
if (acc > MP3_FRAC_MAX) \
{ \
acc = MP3_FRAC_MAX; \
} \
else if (acc < MP3_FRAC_MIN) \
{ \
acc = MP3_FRAC_MIN; \
} \
(mp3_frac) acc; \
})
#else
static inline mp3_frac MP3_FRAC_SAC()
{
acc >>= MP3_FRACBITS;
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return (mp3_frac) acc;
}
#endif
#ifndef ANSI_C
#define MP3_FRAC_SAC_SHIFT(scale) \
({ \
acc >>= (MP3_FRACBITS + scale); \
if (acc > MP3_FRAC_MAX) \
{ \
acc = MP3_FRAC_MAX; \
} \
else if (acc < MP3_FRAC_MIN) \
{ \
acc = MP3_FRAC_MIN; \
} \
(mp3_frac) acc; \
})
#else
static inline mp3_frac MP3_FRAC_SAC_SHIFT(int scale)
{
acc >>= (MP3_FRACBITS + scale);
//if (acc > MP3_FRAC_MAX)
//{
// acc = MP3_FRAC_MAX;
//}
//else if (acc < MP3_FRAC_MIN)
//{
// acc = MP3_FRAC_MIN;
//}
return (mp3_frac) acc;
}
#endif
#else
#error "Fixed point math routines not implemented."
#endif
#endif