elbg.h File Reference

#include <stdint.h>
#include "libavutil/lfg.h"

Go to the source code of this file.

Functions
int	avpriv_elbg_do (struct ELBGContext **ctx, int *points, int dim, int numpoints, int *codebook, int num_cb, int num_steps, int *closest_cb, AVLFG *rand_state, uintptr_t flags)
	Implementation of the Enhanced LBG Algorithm Based on the paper "Neural Networks 14:1219-1237" that can be found in http://citeseer.ist.psu.edu/patan01enhanced.html . More...
void	avpriv_elbg_free (struct ELBGContext **ctx)
	Free an ELBGContext and reset the pointer to it. More...

Function Documentation

avpriv_elbg_do()

int avpriv_elbg_do	(	struct ELBGContext **	ctx,
		int *	points,
		int	dim,
		int	numpoints,
		int *	codebook,
		int	num_cb,
		int	num_steps,
		int *	closest_cb,
		AVLFG *	rand_state,
		uintptr_t	flags
	)

Implementation of the Enhanced LBG Algorithm Based on the paper "Neural Networks 14:1219-1237" that can be found in http://citeseer.ist.psu.edu/patan01enhanced.html .

Parameters

ctx	A pointer to a pointer to an already allocated ELBGContext or a pointer to NULL. In the latter case, this function will allocate an ELBGContext and put a pointer to it in *ctx.
points	Input points.
dim	Dimension of the points.
numpoints	Num of points in **points.
codebook	Pointer to the output codebook. Must be allocated.
num_cb	Number of points in the codebook.
num_steps	The maximum number of steps. One step is already a good compromise between time and quality.
closest_cb	Return the closest codebook to each point. Must be allocated.
rand_state	A random number generator state. Should be already initialized by av_lfg_init().
flags	Currently unused; must be set to 0.

Returns

< 0 in case of error, 0 otherwise

Definition at line 462 of file elbg.c.

Referenced by a64multi_encode_frame(), encode_frame(), filter_frame(), generate_codebook(), and quantize().

avpriv_elbg_free()

void avpriv_elbg_free

(

struct ELBGContext **

ctx

)

Free an ELBGContext and reset the pointer to it.

Definition at line 515 of file elbg.c.

Referenced by a64multi_close_encoder(), cinepak_encode_end(), encode_end(), roq_encode_end(), and uninit().