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/*
* Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
*
* 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_DIRAC_DWT_H
#define AVCODEC_DIRAC_DWT_H
#include <stdint.h>
typedef int DWTELEM;
typedef short IDWTELEM;
#define MAX_DWT_SUPPORT 8
#define MAX_DECOMPOSITIONS 8
typedef struct DWTCompose {
IDWTELEM *b[MAX_DWT_SUPPORT];
int y;
} DWTCompose;
struct DWTContext;
// Possible prototypes for vertical_compose functions
typedef void (*vertical_compose_2tap)(IDWTELEM *b0, IDWTELEM *b1, int width);
typedef void (*vertical_compose_3tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width);
typedef void (*vertical_compose_5tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, int width);
typedef void (*vertical_compose_9tap)(IDWTELEM *dst, IDWTELEM *b[8], int width);
typedef struct DWTContext {
IDWTELEM *buffer;
IDWTELEM *temp;
int width;
int height;
int stride;
int decomposition_count;
int support;
void (*spatial_compose)(struct DWTContext *cs, int level, int width, int height, int stride);
void (*vertical_compose_l0)(void);
void (*vertical_compose_h0)(void);
void (*vertical_compose_l1)(void);
void (*vertical_compose_h1)(void);
void (*vertical_compose)(void); ///< one set of lowpass and highpass combined
void (*horizontal_compose)(IDWTELEM *b, IDWTELEM *tmp, int width);
DWTCompose cs[MAX_DECOMPOSITIONS];
} DWTContext;
enum dwt_type {
DWT_SNOW_DAUB9_7,
DWT_SNOW_LEGALL5_3,
DWT_DIRAC_DD9_7,
DWT_DIRAC_LEGALL5_3,
DWT_DIRAC_DD13_7,
DWT_DIRAC_HAAR0,
DWT_DIRAC_HAAR1,
DWT_DIRAC_FIDELITY,
DWT_DIRAC_DAUB9_7,
DWT_NUM_TYPES
};
// -1 if an error occurred, e.g. the dwt_type isn't recognized
int ff_spatial_idwt_init2(DWTContext *d, IDWTELEM *buffer, int width, int height,
int stride, enum dwt_type type, int decomposition_count,
IDWTELEM *temp);
void ff_spatial_idwt_slice2(DWTContext *d, int y);
// shared stuff for simd optimizations
#define COMPOSE_53iL0(b0, b1, b2)\
(b1 - ((b0 + b2 + 2) >> 2))
#define COMPOSE_DIRAC53iH0(b0, b1, b2)\
(b1 + ((b0 + b2 + 1) >> 1))
#define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\
(b2 + ((-b0 + 9*b1 + 9*b3 - b4 + 8) >> 4))
#define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\
(b2 - ((-b0 + 9*b1 + 9*b3 - b4 + 16) >> 5))
#define COMPOSE_HAARiL0(b0, b1)\
(b0 - ((b1 + 1) >> 1))
#define COMPOSE_HAARiH0(b0, b1)\
(b0 + b1)
#define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
(b4 - ((-8*(b0+b8) + 21*(b1+b7) - 46*(b2+b6) + 161*(b3+b5) + 128) >> 8))
#define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
(b4 + ((-2*(b0+b8) + 10*(b1+b7) - 25*(b2+b6) + 81*(b3+b5) + 128) >> 8))
#define COMPOSE_DAUB97iL1(b0, b1, b2)\
(b1 - ((1817*(b0 + b2) + 2048) >> 12))
#define COMPOSE_DAUB97iH1(b0, b1, b2)\
(b1 - (( 113*(b0 + b2) + 64) >> 7))
#define COMPOSE_DAUB97iL0(b0, b1, b2)\
(b1 + (( 217*(b0 + b2) + 2048) >> 12))
#define COMPOSE_DAUB97iH0(b0, b1, b2)\
(b1 + ((6497*(b0 + b2) + 2048) >> 12))
#endif /* AVCODEC_DWT_H */
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