Implementation of operations on integers (INT). More...

Functions
Exported functions (see also openjpeg.h)
static INLINE OPJ_INT32	opj_int_min (OPJ_INT32 a, OPJ_INT32 b)
	Get the minimum of two integers.
static INLINE OPJ_UINT32	opj_uint_min (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the minimum of two integers.
static INLINE OPJ_INT32	opj_int_max (OPJ_INT32 a, OPJ_INT32 b)
	Get the maximum of two integers.
static INLINE OPJ_UINT32	opj_uint_max (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the maximum of two integers.
static INLINE OPJ_UINT32	opj_uint_adds (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the saturated sum of two unsigned integers.
static INLINE OPJ_UINT32	opj_uint_subs (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the saturated difference of two unsigned integers.
static INLINE OPJ_INT32	opj_int_clamp (OPJ_INT32 a, OPJ_INT32 min, OPJ_INT32 max)
	Clamp an integer inside an interval.
static INLINE OPJ_INT64	opj_int64_clamp (OPJ_INT64 a, OPJ_INT64 min, OPJ_INT64 max)
	Clamp an integer inside an interval.
static INLINE OPJ_INT32	opj_int_abs (OPJ_INT32 a)
static INLINE OPJ_INT32	opj_int_ceildiv (OPJ_INT32 a, OPJ_INT32 b)
	Divide an integer and round upwards.
static INLINE OPJ_UINT32	opj_uint_ceildiv (OPJ_UINT32 a, OPJ_UINT32 b)
	Divide an integer and round upwards.
static INLINE OPJ_UINT32	opj_uint64_ceildiv_res_uint32 (OPJ_UINT64 a, OPJ_UINT64 b)
	Divide an integer and round upwards.
static INLINE OPJ_INT32	opj_int_ceildivpow2 (OPJ_INT32 a, OPJ_INT32 b)
	Divide an integer by a power of 2 and round upwards.
static INLINE OPJ_INT32	opj_int64_ceildivpow2 (OPJ_INT64 a, OPJ_INT32 b)
	Divide a 64bits integer by a power of 2 and round upwards.
static INLINE OPJ_UINT32	opj_uint_ceildivpow2 (OPJ_UINT32 a, OPJ_UINT32 b)
	Divide an integer by a power of 2 and round upwards.
static INLINE OPJ_INT32	opj_int_floordivpow2 (OPJ_INT32 a, OPJ_INT32 b)
	Divide an integer by a power of 2 and round downwards.
static INLINE OPJ_UINT32	opj_uint_floordivpow2 (OPJ_UINT32 a, OPJ_UINT32 b)
	Divide an integer by a power of 2 and round downwards.
static INLINE OPJ_INT32	opj_int_floorlog2 (OPJ_INT32 a)
	Get logarithm of an integer and round downwards.
static INLINE OPJ_UINT32	opj_uint_floorlog2 (OPJ_UINT32 a)
	Get logarithm of an integer and round downwards.
static INLINE OPJ_INT32	opj_int_fix_mul (OPJ_INT32 a, OPJ_INT32 b)
	Multiply two fixed-precision rational numbers.
static INLINE OPJ_INT32	opj_int_fix_mul_t1 (OPJ_INT32 a, OPJ_INT32 b)
static INLINE OPJ_INT32	opj_int_add_no_overflow (OPJ_INT32 a, OPJ_INT32 b)
	Addition two signed integers with a wrap-around behaviour.
static INLINE OPJ_INT32	opj_int_sub_no_overflow (OPJ_INT32 a, OPJ_INT32 b)
	Subtract two signed integers with a wrap-around behaviour.

Detailed Description

Implementation of operations on integers (INT).

The functions in OPJ_INTMATH.H have for goal to realize operations on integers.

Function Documentation

◆ opj_int64_ceildivpow2()

INLINE OPJ_INT32 opj_int64_ceildivpow2	(	OPJ_INT64	a,
		OPJ_INT32	b )

static

Divide a 64bits integer by a power of 2 and round upwards.

Returns: Returns a divided by 2^b

References INLINE, and opj_int64_ceildivpow2().

Referenced by opj_int64_ceildivpow2(), and opj_tcd_init_tile().

◆ opj_int64_clamp()

INLINE OPJ_INT64 opj_int64_clamp	(	OPJ_INT64	a,
		OPJ_INT64	min,
		OPJ_INT64	max )

static

Clamp an integer inside an interval.

Returns

Returns a if (min < a < max)
Returns max if (a > max)
Returns min if (a < min)

References INLINE, max(), min(), and opj_int64_clamp().

Referenced by opj_int64_clamp(), and opj_tcd_dc_level_shift_decode().

◆ opj_int_abs()

INLINE OPJ_INT32 opj_int_abs ( OPJ_INT32 a )

static

Returns: Get absolute value of integer

References INLINE.

◆ opj_int_add_no_overflow()

INLINE OPJ_INT32 opj_int_add_no_overflow	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Addition two signed integers with a wrap-around behaviour.

Assumes complement-to-two signed integers.

Parameters

a
b

Returns: Returns a + b

References INLINE.

◆ opj_int_ceildiv()

INLINE OPJ_INT32 opj_int_ceildiv	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Divide an integer and round upwards.

Returns: Returns a divided by b

References INLINE.

◆ opj_int_ceildivpow2()

INLINE OPJ_INT32 opj_int_ceildivpow2	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Divide an integer by a power of 2 and round upwards.

Returns: Returns a divided by 2^b

References INLINE.

◆ opj_int_clamp()

INLINE OPJ_INT32 opj_int_clamp	(	OPJ_INT32	a,
		OPJ_INT32	min,
		OPJ_INT32	max )

static

Clamp an integer inside an interval.

Returns

Returns a if (min < a < max)
Returns max if (a > max)
Returns min if (a < min)

References INLINE, max(), min(), and opj_int_clamp().

Referenced by opj_int_clamp(), and opj_tcd_dc_level_shift_decode().

◆ opj_int_fix_mul()

INLINE OPJ_INT32 opj_int_fix_mul	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Multiply two fixed-precision rational numbers.

Parameters

a
b

Returns: Returns a * b

References INLINE.

◆ opj_int_fix_mul_t1()

INLINE OPJ_INT32 opj_int_fix_mul_t1	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

References INLINE, opj_int_fix_mul_t1(), and T1_NMSEDEC_FRACBITS.

Referenced by opj_int_fix_mul_t1().

◆ opj_int_floordivpow2()

INLINE OPJ_INT32 opj_int_floordivpow2	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Divide an integer by a power of 2 and round downwards.

Returns: Returns a divided by 2^b

References INLINE, and opj_int_floordivpow2().

Referenced by opj_int_floordivpow2(), and opj_tcd_init_tile().

◆ opj_int_floorlog2()

INLINE OPJ_INT32 opj_int_floorlog2 ( OPJ_INT32 a )

static

Get logarithm of an integer and round downwards.

Returns: Returns log2(a)

References INLINE.

◆ opj_int_max()

INLINE OPJ_INT32 opj_int_max	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Get the maximum of two integers.

Returns: Returns a if a > b else b

References INLINE.

◆ opj_int_min()

INLINE OPJ_INT32 opj_int_min	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Get the minimum of two integers.

Returns: Returns a if a < b else b

References INLINE.

◆ opj_int_sub_no_overflow()

INLINE OPJ_INT32 opj_int_sub_no_overflow	(	OPJ_INT32	a,
		OPJ_INT32	b )

static

Subtract two signed integers with a wrap-around behaviour.

Assumes complement-to-two signed integers.

Parameters

a
b

Returns: Returns a - b

References INLINE.

◆ opj_uint64_ceildiv_res_uint32()

INLINE OPJ_UINT32 opj_uint64_ceildiv_res_uint32	(	OPJ_UINT64	a,
		OPJ_UINT64	b )

static

Divide an integer and round upwards.

Returns: Returns a divided by b

References INLINE, and opj_uint64_ceildiv_res_uint32().

Referenced by opj_pi_next_cprl(), opj_pi_next_pcrl(), opj_pi_next_rpcl(), and opj_uint64_ceildiv_res_uint32().

◆ opj_uint_adds()

INLINE OPJ_UINT32 opj_uint_adds	(	OPJ_UINT32	a,
		OPJ_UINT32	b )

static

Get the saturated sum of two unsigned integers.

Returns: Returns saturated sum of a+b

References INLINE.

◆ opj_uint_ceildiv()

INLINE OPJ_UINT32 opj_uint_ceildiv	(	OPJ_UINT32	a,
		OPJ_UINT32	b )

static

Divide an integer and round upwards.

Returns: Returns a divided by b

References INLINE.

◆ opj_uint_ceildivpow2()

INLINE OPJ_UINT32 opj_uint_ceildivpow2	(	OPJ_UINT32	a,
		OPJ_UINT32	b )

static

Divide an integer by a power of 2 and round upwards.

Returns: Returns a divided by 2^b

References INLINE.

◆ opj_uint_floordivpow2()

INLINE OPJ_UINT32 opj_uint_floordivpow2	(	OPJ_UINT32	a,
		OPJ_UINT32	b )

static

Divide an integer by a power of 2 and round downwards.

Returns: Returns a divided by 2^b

References INLINE, and opj_uint_floordivpow2().

Referenced by opj_get_all_encoding_parameters(), opj_get_encoding_parameters(), opj_pi_next_cprl(), opj_pi_next_pcrl(), opj_pi_next_rpcl(), and opj_uint_floordivpow2().

◆ opj_uint_floorlog2()

INLINE OPJ_UINT32 opj_uint_floorlog2 ( OPJ_UINT32 a )

static

Get logarithm of an integer and round downwards.

Returns: Returns log2(a)

References INLINE, and opj_uint_floorlog2().

Referenced by opj_t2_read_packet_header(), and opj_uint_floorlog2().

◆ opj_uint_max()

INLINE OPJ_UINT32 opj_uint_max	(	OPJ_UINT32	a,
		OPJ_UINT32	b )

static

Get the maximum of two integers.

Returns: Returns a if a > b else b

References INLINE.

◆ opj_uint_min()

INLINE OPJ_UINT32 opj_uint_min	(	OPJ_UINT32	a,
		OPJ_UINT32	b )

static

Get the minimum of two integers.

Returns: Returns a if a < b else b

References INLINE.

◆ opj_uint_subs()

INLINE OPJ_UINT32 opj_uint_subs	(	OPJ_UINT32	a,
		OPJ_UINT32	b )

static

Get the saturated difference of two unsigned integers.

Returns: Returns saturated sum of a-b

References INLINE.

Functions

Detailed Description

Function Documentation

◆ opj_int64_ceildivpow2()

◆ opj_int64_clamp()

◆ opj_int_abs()

◆ opj_int_add_no_overflow()

◆ opj_int_ceildiv()

◆ opj_int_ceildivpow2()

◆ opj_int_clamp()

◆ opj_int_fix_mul()

◆ opj_int_fix_mul_t1()

◆ opj_int_floordivpow2()

◆ opj_int_floorlog2()

◆ opj_int_max()

◆ opj_int_min()

◆ opj_int_sub_no_overflow()

◆ opj_uint64_ceildiv_res_uint32()

◆ opj_uint_adds()

◆ opj_uint_ceildiv()

◆ opj_uint_ceildivpow2()

◆ opj_uint_floordivpow2()

◆ opj_uint_floorlog2()

◆ opj_uint_max()

◆ opj_uint_min()

◆ opj_uint_subs()