Libav
jpeg2000dwt.h
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1 /*
2  * Discrete wavelet transform
3  * Copyright (c) 2007 Kamil Nowosad
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVCODEC_JPEG2000DWT_H
23 #define AVCODEC_JPEG2000DWT_H
24 
30 #include <stdint.h>
31 
32 #define FF_DWT_MAX_DECLVLS 32
33 
34 enum DWTType {
38 };
39 
40 typedef struct DWTContext {
47  float *f_linebuf;
48 } DWTContext;
49 
57 int ff_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2],
58  int decomp_levels, int type);
59 
60 int ff_dwt_decode(DWTContext *s, void *t);
61 
62 void ff_dwt_destroy(DWTContext *s);
63 
64 #endif /* AVCODEC_JPEG2000DWT_H */
uint16_t linelen[FF_DWT_MAX_DECLVLS][2]
line lengths { horizontal, vertical } in consecutive decomposition levels
Definition: jpeg2000dwt.h:42
int ff_jpeg2000_dwt_init(DWTContext *s, uint16_t border[2][2], int decomp_levels, int type)
Initialize DWT.
Definition: jpeg2000dwt.c:291
uint8_t ndeclevels
number of decomposition levels
Definition: jpeg2000dwt.h:44
uint8_t type
0 for 9/7; 1 for 5/3
Definition: jpeg2000dwt.h:45
int32_t * i_linebuf
int buffer used by transform
Definition: jpeg2000dwt.h:46
uint8_t
void ff_dwt_destroy(DWTContext *s)
Definition: jpeg2000dwt.c:356
int32_t
#define FF_DWT_MAX_DECLVLS
max number of decomposition levels
Definition: jpeg2000dwt.h:32
float * f_linebuf
float buffer used by transform
Definition: jpeg2000dwt.h:47
int ff_dwt_decode(DWTContext *s, void *t)
Definition: jpeg2000dwt.c:335
DWTType
Definition: jpeg2000dwt.h:34
uint8_t mod[FF_DWT_MAX_DECLVLS][2]
coordinates (x0, y0) of decomp. levels mod 2
Definition: jpeg2000dwt.h:43