src/wavelet.c File Reference

#include <it/types.h>
#include <it/wavelet.h>
#include <it/io.h>

Go to the source code of this file.

Defines
#define	shift_up(x, l)   (((x) + ~(-1 << (l))) >> (l))
Functions
static int	__wavelet_split (it_wavelet_t *wavelet)
static int	__wavelet_merge (it_wavelet_t *wavelet)
static void	__wavelet_pack (vec flat, vec current, vec next, int levels)
static void	__wavelet_unpack (vec flat, vec current, vec next, int levels)
static Vec	__wavelet_transform (it_transform_t *transform, Vec __input)
static Vec	__wavelet_itransform (it_transform_t *transform, Vec __flat)
static void	__wavelet_get_output_size (it_transform_t *transform, idx_t *input_size)
static void	__wavelet_set_size (it_transform_t *transform, idx_t length)
static void	__wavelet_get_size (it_transform_t *transform, idx_t *length)
static void	__wavelet_destructor (it_object_t *it_this)
	it_instanciate (it_wavelet_t)
vec *	it_wavelet_split (vec wav, int nb_levels)
vec	it_wavelet_merge (vec *subbands, int nb_levels)
vec	it_dwt (vec v, it_wavelet_lifting_t const *lifting, int levels)
vec	it_idwt (vec t, it_wavelet_lifting_t const *lifting, int levels)
Variables
static const double	__it_wavelet_lifting_97_steps []
static const it_wavelet_lifting_t	__it_wavelet_lifting_97
it_wavelet_lifting_t const *	it_wavelet_lifting_97 = &__it_wavelet_lifting_97
static const double	__it_wavelet_lifting_53_steps [] = { -0.5, 0.25 }
static const it_wavelet_lifting_t	__it_wavelet_lifting_53
it_wavelet_lifting_t const *	it_wavelet_lifting_53 = &__it_wavelet_lifting_53

---

Define Documentation

#define shift_up	(	x,
		l		)	(((x) + ~(-1 << (l))) >> (l))

Definition at line 59 of file wavelet.c.

Referenced by __wavelet2D_merge(), __wavelet2D_split(), __wavelet_merge(), __wavelet_pack(), __wavelet_split(), and __wavelet_unpack().

---

Function Documentation

static void __wavelet_destructor

(

it_object_t *

it_this

)

[static]

Definition at line 385 of file wavelet.c.

References _it_wavelet_::current, _it_wavelet_::it_overloaded(), IT_WAVELET, _it_wavelet_::length, _it_wavelet_::next, and vec_delete().

Referenced by it_instanciate().

static void __wavelet_get_output_size	(	it_transform_t *	transform,
		idx_t *	input_size
	)			[static]

Definition at line 356 of file wavelet.c.

Referenced by it_instanciate().

static void __wavelet_get_size	(	it_transform_t *	transform,
		idx_t *	length
	)			[static]

Definition at line 379 of file wavelet.c.

References IT_WAVELET, and _it_wavelet_::length.

Referenced by it_instanciate().

static Vec __wavelet_itransform	(	it_transform_t *	transform,
		Vec	__flat
	)			[static]

Definition at line 320 of file wavelet.c.

References __wavelet_merge(), __wavelet_unpack(), _it_wavelet_::current, it_transform_clear_size, it_transform_set_size, IT_WAVELET, _it_wavelet_::length, _it_wavelet_::level, _it_wavelet_::levels, _it_wavelet_::next, vec_clone(), Vec_header, and vec_length().

Referenced by it_instanciate().

static int __wavelet_merge

(

it_wavelet_t *

wavelet

)

[static]

Definition at line 141 of file wavelet.c.

References _wavelet_lifting_::count, _it_wavelet_::current, IT_EINVAL, _it_wavelet_::length, _it_wavelet_::level, _it_wavelet2D_::level, _it_wavelet_::levels, _it_wavelet2D_::levels, _it_wavelet_::lifting, _it_wavelet_::next, _wavelet_lifting_::scale, scale, shift_up, and _wavelet_lifting_::step.

Referenced by __wavelet_itransform().

static void __wavelet_pack	(	vec	flat,
		vec	current,
		vec	next,
		int	levels
	)			[static]

Definition at line 219 of file wavelet.c.

References shift_up, and vec_length().

Referenced by __wavelet_transform().

static void __wavelet_set_size	(	it_transform_t *	transform,
		idx_t	length
	)			[static]

Definition at line 362 of file wavelet.c.

References _it_wavelet_::current, IT_WAVELET, _it_wavelet_::length, _it_wavelet_::next, vec_delete(), and vec_new().

Referenced by it_instanciate().

static int __wavelet_split

(

it_wavelet_t *

wavelet

)

[static]

Definition at line 62 of file wavelet.c.

References _wavelet_lifting_::count, _it_wavelet_::current, IT_EINVAL, _it_wavelet_::length, _it_wavelet_::level, _it_wavelet2D_::level, _it_wavelet_::levels, _it_wavelet2D_::levels, _it_wavelet_::lifting, _it_wavelet_::next, _wavelet_lifting_::scale, scale, shift_up, and _wavelet_lifting_::step.

Referenced by __wavelet_transform().

static Vec __wavelet_transform	(	it_transform_t *	transform,
		Vec	__input
	)			[static]

Definition at line 281 of file wavelet.c.

References __wavelet_pack(), __wavelet_split(), _it_wavelet_::current, it_transform_clear_size, it_transform_set_size, IT_WAVELET, _it_wavelet_::length, _it_wavelet_::level, _it_wavelet_::levels, _it_wavelet_::next, vec_copy(), Vec_header, vec_length(), and vec_new().

Referenced by it_instanciate().

static void __wavelet_unpack	(	vec	flat,
		vec	current,
		vec	next,
		int	levels
	)			[static]

Definition at line 249 of file wavelet.c.

References shift_up, and vec_length().

Referenced by __wavelet_itransform().

---

Variable Documentation

const it_wavelet_lifting_t __it_wavelet_lifting_53 [static]

Initial value:

 {
  2,
  1.41421,
  __it_wavelet_lifting_53_steps
}

Definition at line 43 of file wavelet.c.

const double __it_wavelet_lifting_53_steps[] = { -0.5, 0.25 } [static]

Definition at line 42 of file wavelet.c.

const it_wavelet_lifting_t __it_wavelet_lifting_97 [static]

Initial value:

 {
  4,
  1.149604398,
  __it_wavelet_lifting_97_steps
}

Definition at line 35 of file wavelet.c.

const double __it_wavelet_lifting_97_steps[] [static]

Initial value:

  { -1.586134342, -0.052980118, 0.882911075, 0.443506852 }

Definition at line 33 of file wavelet.c.