numbers.h File Reference

Fixed-point arithmetic, saturation, rounding, and number format conversions. More...

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Macros
#define	ABS(a)
#define	SGN(a)
#define	USE_SOF_GCD   1
#define	merge_16b16b(high, low)
#define	merge_4b4b(high, low)
#define	INT_MAX_FOR_NUMBER_OF_BITS(N)   ((int64_t)((1ULL << ((N) - 1)) - 1))
#define	INT_MIN_FOR_NUMBER_OF_BITS(N)   ((int64_t)(-((1ULL << ((N) - 1)) - 1) - 1))
#define	SPEED_OF_SOUND   343
#define	RECIPROCAL_SPEED_OF_SOUND_Q31   6260885 /* Q1.31 */

Functions
int	gcd (int a, int b)
static int	ceil_divide (int a, int b)
static void	cross_product_s16 (int32_t *px, int32_t *py, int32_t *pz, int16_t a, int16_t b, int16_t c, int16_t d, int16_t e, int16_t f)
	Cross product function.
int	find_equal_int16 (int16_t idx[], int16_t vec[], int n, int vec_length, int max_results)
int16_t	find_min_int16 (int16_t vec[], int vec_length)
int32_t	find_max_abs_int32 (int32_t vec[], int vec_length)
int	norm_int32 (int32_t val)
uint32_t	crc32 (uint32_t base, const void *data, uint32_t bytes)

Detailed Description

Fixed-point arithmetic, saturation, rounding, and number format conversions.

Macro Definition Documentation

ABS

#define ABS

(

a

)

Value:

    ({      \
    __typeof__(a) __a = (a);    \
    __a < 0 ? -__a : __a;   \
})

INT_MAX_FOR_NUMBER_OF_BITS

#define INT_MAX_FOR_NUMBER_OF_BITS

(

N

)

((int64_t)((1ULL << ((N) - 1)) - 1))

INT_MIN_FOR_NUMBER_OF_BITS

#define INT_MIN_FOR_NUMBER_OF_BITS

(

N

)

((int64_t)(-((1ULL << ((N) - 1)) - 1) - 1))

merge_16b16b

#define merge_16b16b	(		high,
			low
	)

Value:

                 (((uint32_t)(high) << 16) | \
                 ((low) & 0xFFFF))

merge_4b4b

#define merge_4b4b	(		high,
			low
	)

Value:

                   (((uint8_t)(high) << 4) | \
                   ((low) & 0xF))

RECIPROCAL_SPEED_OF_SOUND_Q31

#define RECIPROCAL_SPEED_OF_SOUND_Q31   6260885 /* Q1.31 */

SGN

#define SGN

(

a

)

Value:

    ({      \
    __typeof__(a) __a = (a);    \
    __a < 0 ? -1 :      \
    __a > 0 ? 1 : 0;    \
})

SPEED_OF_SOUND

#define SPEED_OF_SOUND   343

USE_SOF_GCD

#define USE_SOF_GCD   1

Function Documentation

ceil_divide()

static int ceil_divide ( int  a, int  b  )

inlinestatic

crc32()

uint32_t crc32	(	uint32_t	base,
		const void *	data,
		uint32_t	bytes
	)

cross_product_s16()

static void cross_product_s16 ( int32_t *  px, int32_t *  py, int32_t *  pz, int16_t  a, int16_t  b, int16_t  c, int16_t  d, int16_t  e, int16_t  f  )

inlinestatic

Cross product function.

Calculate cross product for vectors AB(a, b, c) and AC(d, e, f), where A, B, and C are points of a triangle in 3D space. Cross product is used in computational geometry. Cross product AB x AC is (b * f - c * e, c * d - a * f, a * e - b * d)

Parameters

[out]	px	x-axis component of cross product vector
[out]	py	y-axis component of cross product vector
[out]	pz	z-axis component of cross product vector
[in]	a	x-axis component of vector AB
[in]	b	y-axis component of vector AB
[in]	c	z-axis component of vector AB
[in]	d	x-axis component of vector AC
[in]	e	y-axis component of vector AC
[in]	f	z-axis component of vector AC

find_equal_int16()

int find_equal_int16	(	int16_t	idx[],
		int16_t	vec[],
		int	n,
		int	vec_length,
		int	max_results
	)

find_max_abs_int32()

int32_t find_max_abs_int32	(	int32_t	vec[],
		int	vec_length
	)

find_min_int16()

int16_t find_min_int16	(	int16_t	vec[],
		int	vec_length
	)

gcd()

int gcd	(	int	a,
		int	b
	)

norm_int32()

int norm_int32

(

int32_t

val

)