yading@10: /*
yading@10:  * Discrete wavelet transform
yading@10:  * Copyright (c) 2007 Kamil Nowosad
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVCODEC_DWT_H
yading@10: #define AVCODEC_DWT_H
yading@10: 
yading@10: /**
yading@10:  * Discrete wavelet transform
yading@10:  * @file
yading@10:  * @author Kamil Nowosad
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: 
yading@10: #define FF_DWT_MAX_DECLVLS 32 ///< max number of decomposition levels
yading@10: 
yading@10: enum DWTType{
yading@10:     FF_DWT97,
yading@10:     FF_DWT53
yading@10: };
yading@10: 
yading@10: typedef struct {
yading@10:     ///line lengths {horizontal, vertical} in consecutive decomposition levels
yading@10:     uint16_t linelen[FF_DWT_MAX_DECLVLS][2];
yading@10:     uint8_t  mod[FF_DWT_MAX_DECLVLS][2]; ///< coordinates (x0, y0) of decomp. levels mod 2
yading@10:     uint8_t  ndeclevels;                 ///< number of decomposition levels
yading@10:     uint8_t  type;                       ///< 0 for 9/7; 1 for 5/3
yading@10:     void     *linebuf;                   ///< buffer used by transform (int or float)
yading@10: } DWTContext;
yading@10: 
yading@10: /**
yading@10:  * initialize DWT
yading@10:  * @param s DWT context
yading@10:  * @param border coordinates of transformed region {{x0, x1}, {y0, y1}}
yading@10:  * @param decomp_levels number of decomposition levels
yading@10:  * @param type 0 for DWT 9/7; 1 for DWT 5/3
yading@10:  */
yading@10: int ff_j2k_dwt_init(DWTContext *s, uint16_t border[2][2], int decomp_levels, int type);
yading@10: 
yading@10: int ff_j2k_dwt_encode(DWTContext *s, int *t);
yading@10: int ff_j2k_dwt_decode(DWTContext *s, int *t);
yading@10: 
yading@10: void ff_j2k_dwt_destroy(DWTContext *s);
yading@10: 
yading@10: #endif /* AVCODEC_DWT_H */