/*
  * Discrete wavelet transform
  * Copyright (c) 2007 Kamil Nowosad
  *
  * 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_DWT_H
 #define AVCODEC_DWT_H
 
 /**
  * Discrete wavelet transform
  * @file
  * @author Kamil Nowosad
  */
 
 #include "avcodec.h"
 
 #define FF_DWT_MAX_DECLVLS 32 ///< max number of decomposition levels
 
 enum DWTType{
     FF_DWT97,
     FF_DWT53
 };
 
 typedef struct {
     ///line lengths {horizontal, vertical} in consecutive decomposition levels
     uint16_t linelen[FF_DWT_MAX_DECLVLS][2];
     uint8_t  mod[FF_DWT_MAX_DECLVLS][2]; ///< coordinates (x0, y0) of decomp. levels mod 2
     uint8_t  ndeclevels;                 ///< number of decomposition levels
     uint8_t  type;                       ///< 0 for 9/7; 1 for 5/3
     void     *linebuf;                   ///< buffer used by transform (int or float)
 } DWTContext;
 
 /**
  * initialize DWT
  * @param s DWT context
  * @param border coordinates of transformed region {{x0, x1}, {y0, y1}}
  * @param decomp_levels number of decomposition levels
  * @param type 0 for DWT 9/7; 1 for DWT 5/3
  */
 int ff_j2k_dwt_init(DWTContext *s, uint16_t border[2][2], int decomp_levels, int type);
 
 int ff_j2k_dwt_encode(DWTContext *s, int *t);
 int ff_j2k_dwt_decode(DWTContext *s, int *t);
 
 void ff_j2k_dwt_destroy(DWTContext *s);
 
 #endif /* AVCODEC_DWT_H */