ffmpeg/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     IDWTELEM *b[MAX_DWT_SUPPORT];
  34     int y;
  35 } DWTCompose;
  36
  37 struct DWTContext;
  38
  39 // Possible prototypes for vertical_compose functions
  40 typedef void (*vertical_compose_2tap)(IDWTELEM *b0, IDWTELEM *b1, int width);
  41 typedef void (*vertical_compose_3tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width);
  42 typedef void (*vertical_compose_5tap)(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, int width);
  43 typedef void (*vertical_compose_9tap)(IDWTELEM *dst, IDWTELEM *b[8], int width);
  44
  45 typedef 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
  65 enum 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
  79 int 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
  83 void 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 */