| /* |
| * 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 <stdint.h> |
| #include "libavutil/lfg.h" |
| |
| struct ELBGContext; |
| |
| /** |
| * 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 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`. |
| * @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 num_cb 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(). |
| * @param flags Currently unused; must be set to 0. |
| * @return < 0 in case of error, 0 otherwise |
| */ |
| 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); |
| |
| /** |
| * Free an ELBGContext and reset the pointer to it. |
| */ |
| void avpriv_elbg_free(struct ELBGContext **ctx); |
| |
| #endif /* AVCODEC_ELBG_H */ |