/*

  * Copyright (C) 2007 Vitor Sessak <vitor1001@gmail.com>

  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #ifndef AVCODEC_ELBG_H
 #define AVCODEC_ELBG_H

 #include "libavutil/lfg.h"

 
 /**
  * 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 .
  *
  * @param points Input points.
  * @param dim Dimension of the points.
  * @param numpoints Num of points in **points.
  * @param codebook Pointer to the output codebook. Must be allocated.
  * @param numCB Number of points in the codebook.
  * @param num_steps The maximum number of steps. One step is already a good compromise between time and quality.
  * @param closest_cb Return the closest codebook to each point. Must be allocated.

  * @param rand_state A random number generator state. Should be already initialized by av_lfg_init().

  */

 void avpriv_do_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 avpriv_do_elbg for a (smaller) random sample of the points in
  * **points. Get the same parameters as avpriv_do_elbg.

  */

 void avpriv_init_elbg(int *points, int dim, int numpoints, int *codebook,

                   int numCB, int num_steps, int *closest_cb,

                   AVLFG *rand_state);

 #endif /* AVCODEC_ELBG_H */