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58 lines
2.3 KiB
C
58 lines
2.3 KiB
C
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/*
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* Copyright (C) 2007 Vitor Sessak <vitor1001@gmail.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_ELBG_H
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#define AVCODEC_ELBG_H
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#include <stdint.h>
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#include "libavutil/lfg.h"
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struct ELBGContext;
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/**
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* Implementation of the Enhanced LBG Algorithm
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* Based on the paper "Neural Networks 14:1219-1237" that can be found in
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* http://citeseer.ist.psu.edu/patan01enhanced.html .
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*
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* @param ctx A pointer to a pointer to an already allocated ELBGContext
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* or a pointer to NULL. In the latter case, this function
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* will allocate an ELBGContext and put a pointer to it in `*ctx`.
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* @param points Input points.
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* @param dim Dimension of the points.
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* @param numpoints Num of points in **points.
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* @param codebook Pointer to the output codebook. Must be allocated.
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* @param num_cb Number of points in the codebook.
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* @param num_steps The maximum number of steps. One step is already a good compromise between time and quality.
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* @param closest_cb Return the closest codebook to each point. Must be allocated.
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* @param rand_state A random number generator state. Should be already initialized by av_lfg_init().
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* @param flags Currently unused; must be set to 0.
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* @return < 0 in case of error, 0 otherwise
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*/
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int avpriv_elbg_do(struct ELBGContext **ctx, int *points, int dim,
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int numpoints, int *codebook, int num_cb, int num_steps,
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int *closest_cb, AVLFG *rand_state, uintptr_t flags);
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/**
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* Free an ELBGContext and reset the pointer to it.
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*/
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void avpriv_elbg_free(struct ELBGContext **ctx);
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#endif /* AVCODEC_ELBG_H */
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