1/* 2 * Copyright (C) 2007 Vitor Sessak <vitor1001@gmail.com> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVCODEC_ELBG_H 22#define AVCODEC_ELBG_H 23 24#include <stdint.h> 25#include "libavutil/lfg.h" 26 27struct ELBGContext; 28 29/** 30 * Implementation of the Enhanced LBG Algorithm 31 * Based on the paper "Neural Networks 14:1219-1237" that can be found in 32 * http://citeseer.ist.psu.edu/patan01enhanced.html . 33 * 34 * @param ctx A pointer to a pointer to an already allocated ELBGContext 35 * or a pointer to NULL. In the latter case, this function 36 * will allocate an ELBGContext and put a pointer to it in `*ctx`. 37 * @param points Input points. 38 * @param dim Dimension of the points. 39 * @param numpoints Num of points in **points. 40 * @param codebook Pointer to the output codebook. Must be allocated. 41 * @param num_cb Number of points in the codebook. 42 * @param num_steps The maximum number of steps. One step is already a good compromise between time and quality. 43 * @param closest_cb Return the closest codebook to each point. Must be allocated. 44 * @param rand_state A random number generator state. Should be already initialized by av_lfg_init(). 45 * @param flags Currently unused; must be set to 0. 46 * @return < 0 in case of error, 0 otherwise 47 */ 48int avpriv_elbg_do(struct ELBGContext **ctx, int *points, int dim, 49 int numpoints, int *codebook, int num_cb, int num_steps, 50 int *closest_cb, AVLFG *rand_state, uintptr_t flags); 51 52/** 53 * Free an ELBGContext and reset the pointer to it. 54 */ 55void avpriv_elbg_free(struct ELBGContext **ctx); 56 57#endif /* AVCODEC_ELBG_H */ 58