libavcodec/j2k_dwt.h
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00001 /*
00002  * Discrete wavelet transform
00003  * Copyright (c) 2007 Kamil Nowosad
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #ifndef AVCODEC_DWT_H
00023 #define AVCODEC_DWT_H
00024 
00031 #include "avcodec.h"
00032 
00033 #define FF_DWT_MAX_DECLVLS 32 ///< max number of decomposition levels
00034 
00035 enum DWTType{
00036     FF_DWT97,
00037     FF_DWT53
00038 };
00039 
00040 typedef struct {
00042     uint16_t linelen[FF_DWT_MAX_DECLVLS][2];
00043     uint8_t  mod[FF_DWT_MAX_DECLVLS][2]; 
00044     uint8_t  ndeclevels;                 
00045     uint8_t  type;                       
00046     void     *linebuf;                   
00047 } DWTContext;
00048 
00056 int ff_j2k_dwt_init(DWTContext *s, uint16_t border[2][2], int decomp_levels, int type);
00057 
00058 int ff_j2k_dwt_encode(DWTContext *s, int *t);
00059 int ff_j2k_dwt_decode(DWTContext *s, int *t);
00060 
00061 void ff_j2k_dwt_destroy(DWTContext *s);
00062 
00063 #endif /* AVCODEC_DWT_H */