1/* 2 * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVCODEC_DIRAC_DWT_H 22#define AVCODEC_DIRAC_DWT_H 23 24#include <stdint.h> 25 26typedef int DWTELEM; 27typedef short IDWTELEM; 28 29#define MAX_DWT_SUPPORT 8 30#define MAX_DECOMPOSITIONS 8 31 32typedef struct DWTCompose { 33 IDWTELEM *b[MAX_DWT_SUPPORT]; 34 int y; 35} DWTCompose; 36 37struct DWTContext; 38 39// Possible prototypes for vertical_compose functions 40typedef void (*vertical_compose_2tap)(IDWTELEM *b0, IDWTELEM *b1, int width); 41typedef void (*vertical_compose_3tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width); 42typedef void (*vertical_compose_5tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, int width); 43typedef void (*vertical_compose_9tap)(IDWTELEM *dst, IDWTELEM *b[8], int width); 44 45typedef struct DWTContext { 46 IDWTELEM *buffer; 47 IDWTELEM *temp; 48 int width; 49 int height; 50 int stride; 51 int decomposition_count; 52 int support; 53 54 void (*spatial_compose)(struct DWTContext *cs, int level, int width, int height, int stride); 55 void (*vertical_compose_l0)(void); 56 void (*vertical_compose_h0)(void); 57 void (*vertical_compose_l1)(void); 58 void (*vertical_compose_h1)(void); 59 void (*vertical_compose)(void); ///< one set of lowpass and highpass combined 60 void (*horizontal_compose)(IDWTELEM *b, IDWTELEM *tmp, int width); 61 62 DWTCompose cs[MAX_DECOMPOSITIONS]; 63} DWTContext; 64 65enum dwt_type { 66 DWT_SNOW_DAUB9_7, 67 DWT_SNOW_LEGALL5_3, 68 DWT_DIRAC_DD9_7, 69 DWT_DIRAC_LEGALL5_3, 70 DWT_DIRAC_DD13_7, 71 DWT_DIRAC_HAAR0, 72 DWT_DIRAC_HAAR1, 73 DWT_DIRAC_FIDELITY, 74 DWT_DIRAC_DAUB9_7, 75 DWT_NUM_TYPES 76}; 77 78// -1 if an error occurred, e.g. the dwt_type isn't recognized 79int ff_spatial_idwt_init2(DWTContext *d, IDWTELEM *buffer, int width, int height, 80 int stride, enum dwt_type type, int decomposition_count, 81 IDWTELEM *temp); 82 83void ff_spatial_idwt_slice2(DWTContext *d, int y); 84 85// shared stuff for simd optimizations 86#define COMPOSE_53iL0(b0, b1, b2)\ 87 (b1 - ((b0 + b2 + 2) >> 2)) 88 89#define COMPOSE_DIRAC53iH0(b0, b1, b2)\ 90 (b1 + ((b0 + b2 + 1) >> 1)) 91 92#define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\ 93 (b2 + ((-b0 + 9*b1 + 9*b3 - b4 + 8) >> 4)) 94 95#define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\ 96 (b2 - ((-b0 + 9*b1 + 9*b3 - b4 + 16) >> 5)) 97 98#define COMPOSE_HAARiL0(b0, b1)\ 99 (b0 - ((b1 + 1) >> 1)) 100 101#define COMPOSE_HAARiH0(b0, b1)\ 102 (b0 + b1) 103 104#define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\ 105 (b4 - ((-8*(b0+b8) + 21*(b1+b7) - 46*(b2+b6) + 161*(b3+b5) + 128) >> 8)) 106 107#define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\ 108 (b4 + ((-2*(b0+b8) + 10*(b1+b7) - 25*(b2+b6) + 81*(b3+b5) + 128) >> 8)) 109 110#define COMPOSE_DAUB97iL1(b0, b1, b2)\ 111 (b1 - ((1817*(b0 + b2) + 2048) >> 12)) 112 113#define COMPOSE_DAUB97iH1(b0, b1, b2)\ 114 (b1 - (( 113*(b0 + b2) + 64) >> 7)) 115 116#define COMPOSE_DAUB97iL0(b0, b1, b2)\ 117 (b1 + (( 217*(b0 + b2) + 2048) >> 12)) 118 119#define COMPOSE_DAUB97iH0(b0, b1, b2)\ 120 (b1 + ((6497*(b0 + b2) + 2048) >> 12)) 121 122 123#endif /* AVCODEC_DWT_H */ 124