libavcodec/dirac_dwt.h

   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
  26 typedef int DWTELEM;
  27 typedef short IDWTELEM;
  28
  29 #define MAX_DWT_SUPPORT 8
  30 #define MAX_DECOMPOSITIONS 8
  31
  32 typedef struct DWTCompose {
  33     uint8_t *b[MAX_DWT_SUPPORT];
  34     int y;
  35 } DWTCompose;
  36
  37 typedef struct DWTPlane {
  38     int width;
  39     int height;
  40     int stride;
  41     uint8_t *buf;
  42     uint8_t *buf_base;
  43     uint8_t *tmp;
  44 } DWTPlane;
  45
  46 struct DWTContext;
  47
  48 // Possible prototypes for vertical_compose functions
  49 typedef void (*vertical_compose_2tap)(uint8_t *b0, uint8_t *b1, int width);
  50 typedef void (*vertical_compose_3tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, int width);
  51 typedef void (*vertical_compose_5tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, uint8_t *b3, uint8_t *b4, int width);
  52 typedef void (*vertical_compose_9tap)(uint8_t *dst, uint8_t *b[8], int width);
  53
  54 typedef struct DWTContext {
  55     uint8_t *buffer;
  56     uint8_t *temp;
  57     int width;
  58     int height;
  59     int stride;
  60     int decomposition_count;
  61     int support;
  62
  63     void (*spatial_compose)(struct DWTContext *cs, int level, int width, int height, int stride);
  64     union {
  65         vertical_compose_3tap tap3;
  66         vertical_compose_5tap tap5;
  67         vertical_compose_9tap tap9;
  68     } vertical_compose_l0, vertical_compose_h0;
  69     vertical_compose_3tap vertical_compose_l1;
  70     vertical_compose_3tap vertical_compose_h1;
  71     vertical_compose_2tap vertical_compose;     ///< one set of lowpass and highpass combined
  72     void (*horizontal_compose)(uint8_t *b, uint8_t *tmp, int width);
  73
  74     DWTCompose cs[MAX_DECOMPOSITIONS];
  75 } DWTContext;
  76
  77 enum dwt_type {
  78     DWT_SNOW_DAUB9_7,
  79     DWT_SNOW_LEGALL5_3,
  80     DWT_DIRAC_DD9_7,
  81     DWT_DIRAC_LEGALL5_3,
  82     DWT_DIRAC_DD13_7,
  83     DWT_DIRAC_HAAR0,
  84     DWT_DIRAC_HAAR1,
  85     DWT_DIRAC_FIDELITY,
  86     DWT_DIRAC_DAUB9_7,
  87     DWT_NUM_TYPES
  88 };
  89
  90 // -1 if an error occurred, e.g. the dwt_type isn't recognized
  91 int ff_spatial_idwt_init(DWTContext *d, DWTPlane *p, enum dwt_type type,
  92                          int decomposition_count, int bit_depth);
  93 void ff_spatial_idwt_init_x86(DWTContext *d, enum dwt_type type);
  94
  95 void ff_spatial_idwt_slice2(DWTContext *d, int y);
  96
  97 // shared stuff for simd optimizations
  98 #define COMPOSE_53iL0(b0, b1, b2)\
  99     (b1 - (unsigned)((int)(b0 + (unsigned)(b2) + 2) >> 2))
 100
 101 #define COMPOSE_DIRAC53iH0(b0, b1, b2)\
 102     (b1 + (unsigned)((int)(b0 + (unsigned)(b2) + 1) >> 1))
 103
 104 #define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\
 105     (int)(((unsigned)(b2) + ((int)(9U*b1 + 9U*b3 - b4 - b0 +  8) >> 4)))
 106
 107 #define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\
 108     (int)(((unsigned)(b2) - ((int)(9U*b1 + 9U*b3 - b4 - b0 + 16) >> 5)))
 109
 110 #define COMPOSE_HAARiL0(b0, b1)\
 111     ((int)(b0 - (unsigned)((int)(b1 + 1U) >> 1)))
 112
 113 #define COMPOSE_HAARiH0(b0, b1)\
 114     ((int)(b0 + (unsigned)(b1)))
 115
 116 #define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
 117     ((unsigned)b4 - ((int)(-8*(b0+(unsigned)b8) + 21*(b1+(unsigned)b7) - 46*(b2+(unsigned)b6) + 161*(b3+(unsigned)b5) + 128) >> 8))
 118
 119 #define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\
 120     ((unsigned)b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 25*(b2+(unsigned)b6) +  81*(b3+(unsigned)b5) + 128) >> 8))
 121
 122 #define COMPOSE_DAUB97iL1(b0, b1, b2)\
 123     ((unsigned)(b1) - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12))
 124
 125 #define COMPOSE_DAUB97iH1(b0, b1, b2)\
 126     ((unsigned)(b1) - ((int)( 113*(b0 + (unsigned)b2) + 64) >> 7))
 127
 128 #define COMPOSE_DAUB97iL0(b0, b1, b2)\
 129     ((unsigned)(b1) + ((int)( 217*(b0 + (unsigned)b2) + 2048) >> 12))
 130
 131 #define COMPOSE_DAUB97iH0(b0, b1, b2)\
 132     ((unsigned)(b1) + ((int)(6497*(b0 + (unsigned)b2) + 2048) >> 12))
 133
 134
 135 #endif /* AVCODEC_DWT_H */