ffmpeg / libavcodec / elbg.h @ 9aa2ab42
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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 021101301 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 "libavutil/random.h" 
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/**

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* Implementation of the Enhanced LBG Algorithm

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* Based on the paper "Neural Networks 14:12191237" 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 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 numCB 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 initialised by av_random_init.

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*/

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

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* Initialize the **codebook vector for the elbg algorithm. If you have already

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* a codebook and you want to refine it, you shouldn't call this function.

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* If numpoints < 8*numCB this function fills **codebook with random numbers.

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* If not, it calls ff_do_elbg for a (smaller) random sample of the points in

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* **points. Get the same parameters as ff_do_elbg.

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*/

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void ff_init_elbg(int *points, int dim, int numpoints, int *codebook, 
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int numCB, int num_steps, int *closest_cb, 
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AVLFG *rand_state); 
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#endif /* AVCODEC_ELBG_H */ 