/*
  * 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_JPEG2000DWT_H
 #define AVCODEC_JPEG2000DWT_H
 
 /**
  * @file
  * Discrete wavelet transform
  */
 
 #include <stdint.h>
 
 #define FF_DWT_MAX_DECLVLS 32 ///< max number of decomposition levels
 
 enum DWTType {
     FF_DWT97,
     FF_DWT53,
     FF_DWT97_INT
 };
 
 typedef struct DWTContext {
     /// 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
     int32_t *i_linebuf;                  ///< int buffer used by transform
     float   *f_linebuf;                  ///< float buffer used by transform
 } 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_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2],
                          int decomp_levels, int type);
 

 int ff_dwt_encode(DWTContext *s, void *t);

 int ff_dwt_decode(DWTContext *s, void *t);
 
 void ff_dwt_destroy(DWTContext *s);
 
 #endif /* AVCODEC_JPEG2000DWT_H */