libavcodec/elbg.h File Reference

#include "libavutil/lfg.h"

Go to the source code of this file.

Functions
void	ff_do_elbg (int *points, int dim, int numpoints, int *codebook, int numCB, int num_steps, int *closest_cb, AVLFG *rand_state)
	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 .
void	ff_init_elbg (int *points, int dim, int numpoints, int *codebook, int numCB, int num_steps, int *closest_cb, AVLFG *rand_state)
	Initialize the **codebook vector for the elbg algorithm.

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Function Documentation

void ff_do_elbg	(	int *	points,
		int	dim,
		int	numpoints,
		int *	codebook,
		int	numCB,
		int	num_steps,
		int *	closest_cb,
		AVLFG *	rand_state
	)

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:

	points	Input points.
	dim	Dimension of the points.
	numpoints	Num of points in **points.
	codebook	Pointer to the output codebook. Must be allocated.
	numCB	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().

Definition at line 352 of file elbg.c.

Referenced by a64multi_encode_frame(), encode_frame(), ff_init_elbg(), and generate_codebook().

void ff_init_elbg	(	int *	points,
		int	dim,
		int	numpoints,
		int *	codebook,
		int	numCB,
		int	num_steps,
		int *	closest_cb,
		AVLFG *	rand_state
	)

Initialize the **codebook vector for the elbg algorithm.

If you have already a codebook and you want to refine it, you shouldn't call this function. If numpoints < 8*numCB this function fills **codebook with random numbers. If not, it calls ff_do_elbg for a (smaller) random sample of the points in **points. Get the same parameters as ff_do_elbg.

Definition at line 325 of file elbg.c.

Referenced by a64multi_encode_frame(), encode_frame(), ff_init_elbg(), and generate_codebook().