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. More...

static INLINE OPJ_UINT32	opj_uint_min (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the minimum of two integers. More...

static INLINE OPJ_INT32	opj_int_max (OPJ_INT32 a, OPJ_INT32 b)
	Get the maximum of two integers. More...

static INLINE OPJ_UINT32	opj_uint_max (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the maximum of two integers. More...

static INLINE OPJ_UINT32	opj_uint_adds (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the saturated sum of two unsigned integers. More...

static INLINE OPJ_UINT32	opj_uint_subs (OPJ_UINT32 a, OPJ_UINT32 b)
	Get the saturated difference of two unsigned integers. More...

static INLINE OPJ_INT32	opj_int_clamp (OPJ_INT32 a, OPJ_INT32 min, OPJ_INT32 max)
	Clamp an integer inside an interval. More...

static INLINE OPJ_INT64	opj_int64_clamp (OPJ_INT64 a, OPJ_INT64 min, OPJ_INT64 max)
	Clamp an integer inside an interval. More...

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. More...

static INLINE OPJ_UINT32	opj_uint_ceildiv (OPJ_UINT32 a, OPJ_UINT32 b)
	Divide an integer and round upwards. More...

static INLINE OPJ_INT32	opj_int_ceildivpow2 (OPJ_INT32 a, OPJ_INT32 b)
	Divide an integer by a power of 2 and round upwards. More...

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. More...

static INLINE OPJ_UINT32	opj_uint_ceildivpow2 (OPJ_UINT32 a, OPJ_UINT32 b)
	Divide an integer by a power of 2 and round upwards. More...

static INLINE OPJ_INT32	opj_int_floordivpow2 (OPJ_INT32 a, OPJ_INT32 b)
	Divide an integer by a power of 2 and round downwards. More...

static INLINE OPJ_UINT32	opj_uint_floordivpow2 (OPJ_UINT32 a, OPJ_UINT32 b)
	Divide an integer by a power of 2 and round downwards. More...

static INLINE OPJ_INT32	opj_int_floorlog2 (OPJ_INT32 a)
	Get logarithm of an integer and round downwards. More...

static INLINE OPJ_UINT32	opj_uint_floorlog2 (OPJ_UINT32 a)
	Get logarithm of an integer and round downwards. More...

static INLINE OPJ_INT32	opj_int_fix_mul (OPJ_INT32 a, OPJ_INT32 b)
	Multiply two fixed-precision rational numbers. More...

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. More...

static INLINE OPJ_INT32	opj_int_sub_no_overflow (OPJ_INT32 a, OPJ_INT32 b)
	Subtract two signed integers with a wrap-around behaviour. More...

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()

static 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

Referenced by opj_tcd_init_tile().

◆ opj_int64_clamp()

static 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 max(), and min().

Referenced by opj_tcd_dc_level_shift_decode().

◆ opj_int_abs()

static INLINE OPJ_INT32 opj_int_abs ( OPJ_INT32 a )

static

Returns: Get absolute value of integer

Referenced by opj_dwt_encode_step1_combined().

◆ opj_int_add_no_overflow()

static 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

Referenced by opj_dwt_decode_partial_1(), opj_dwt_decode_partial_1_parallel(), opj_idwt3_v_cas0(), opj_idwt53_h_cas0(), and opj_idwt53_h_cas1().

◆ opj_int_ceildiv()

static 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

Referenced by opj_get_tile_dimensions(), opj_j2k_get_tile(), opj_j2k_read_siz(), opj_j2k_set_decode_area(), opj_j2k_setup_encoder(), opj_j2k_update_image_dimensions(), and opj_tcd_init_tile().

◆ opj_int_ceildivpow2()

static 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

Referenced by init_tilec(), opj_j2k_get_tile(), opj_j2k_update_image_dimensions(), and opj_tcd_init_tile().

◆ opj_int_clamp()

static 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 max(), and min().

Referenced by opj_tcd_dc_level_shift_decode().

◆ opj_int_fix_mul()

static 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

Referenced by opj_mct_encode_custom().

◆ opj_int_fix_mul_t1()

static INLINE OPJ_INT32 opj_int_fix_mul_t1	(	OPJ_INT32	a,
		OPJ_INT32	b
	)

static

References T1_NMSEDEC_FRACBITS.

◆ opj_int_floordivpow2()

static 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

Referenced by opj_tcd_init_tile().

◆ opj_int_floorlog2()

static INLINE OPJ_INT32 opj_int_floorlog2 ( OPJ_INT32 a )

static

Get logarithm of an integer and round downwards.

Returns: Returns log2(a)

Referenced by opj_dwt_encode_stepsize(), opj_j2k_setup_encoder(), opj_t1_encode_cblk(), and opj_t2_encode_packet().

◆ opj_int_max()

static 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

Referenced by main(), opj_j2k_update_rates(), opj_t1_encode_cblk(), opj_t2_encode_packet(), and opj_tcd_init_tile().

◆ opj_int_min()

static 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

Referenced by opj_dwt_encode_1_real(), opj_dwt_encode_and_deinterleave_v_real(), opj_j2k_update_rates(), opj_j2k_write_poc_in_memory(), opj_t2_read_packet_header(), opj_tcd_init_tile(), opj_v8dwt_decode(), t1_init_ctxno_sc(), and t1_init_spb().

◆ opj_int_sub_no_overflow()

static 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

Referenced by opj_dwt_decode_partial_1(), opj_dwt_decode_partial_1_parallel(), and opj_idwt3_v_cas0().

◆ opj_uint_adds()

static 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

Referenced by opj_dwt_segment_grow(), opj_get_all_encoding_parameters(), opj_get_encoding_parameters(), opj_image_comp_header_update(), opj_j2k_read_siz(), opj_tcd_init_tile(), and opj_tcd_is_subband_area_of_interest().

◆ opj_uint_ceildiv()

static 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

Referenced by opj_get_all_encoding_parameters(), opj_get_encoding_parameters(), opj_image_comp_header_update(), opj_j2k_get_specific_header_sizes(), opj_j2k_update_rates(), opj_pi_next_cprl(), opj_pi_next_pcrl(), opj_pi_next_rpcl(), opj_sparse_array_int32_create(), opj_tcd_decode_tile(), opj_tcd_is_subband_area_of_interest(), and opj_tcd_is_whole_tilecomp_decoding().

◆ opj_uint_ceildivpow2()

static 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

Referenced by opj_dwt_get_band_coordinates(), opj_get_all_encoding_parameters(), opj_get_encoding_parameters(), opj_image_comp_header_update(), opj_j2k_update_image_data(), opj_tcd_decode_tile(), and opj_tcd_is_subband_area_of_interest().

◆ opj_uint_floordivpow2()

static 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

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

◆ opj_uint_floorlog2()

static INLINE OPJ_UINT32 opj_uint_floorlog2 ( OPJ_UINT32 a )

static

Get logarithm of an integer and round downwards.

Returns: Returns log2(a)

Referenced by opj_t2_read_packet_header().

◆ opj_uint_max()

static 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

Referenced by opj_dwt_decode_partial_97(), opj_dwt_decode_partial_tile(), opj_dwt_decode_tile_97(), opj_get_all_encoding_parameters(), opj_get_encoding_parameters(), opj_image_comp_header_update(), opj_j2k_get_max_coc_size(), opj_j2k_get_max_poc_size(), opj_j2k_get_max_toc_size(), opj_j2k_get_specific_header_sizes(), opj_t2_decode_packets(), opj_tcd_decode_tile(), opj_tcd_init_tile(), opj_tcd_is_subband_area_of_interest(), and opj_tcd_is_whole_tilecomp_decoding().

◆ opj_uint_min()

static INLINE OPJ_UINT32 opj_uint_min	(	OPJ_UINT32	a,
		OPJ_UINT32	b
	)

static

◆ opj_uint_subs()

static 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

Referenced by opj_dwt_decode_partial_97(), opj_dwt_decode_partial_tile(), and opj_dwt_segment_grow().

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_uint_adds()

◆ opj_uint_ceildiv()

◆ opj_uint_ceildivpow2()

◆ opj_uint_floordivpow2()

◆ opj_uint_floorlog2()

◆ opj_uint_max()

◆ opj_uint_min()

◆ opj_uint_subs()