libavcodec/snow.h

   1 /*
   2  * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
   3  * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg 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  * FFmpeg 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 FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #ifndef _SNOW_H
  23 #define _SNOW_H
  24
  25 #include "dsputil.h"
  26
  27 #define MID_STATE 128
  28
  29 #define MAX_DECOMPOSITIONS 8
  30 #define MAX_PLANES 4
  31 #define QSHIFT 5
  32 #define QROOT (1<<QSHIFT)
  33 #define LOSSLESS_QLOG -128
  34 #define FRAC_BITS 8
  35 #define MAX_REF_FRAMES 8
  36
  37 #define LOG2_OBMC_MAX 8
  38 #define OBMC_MAX (1<<(LOG2_OBMC_MAX))
  39
  40 #define DWT_97 0
  41 #define DWT_53 1
  42 #define DWT_X  2
  43
  44 /** Used to minimize the amount of memory used in order to optimize cache performance. **/
  45 struct slice_buffer_s {
  46     DWTELEM * * line; ///< For use by idwt and predict_slices.
  47     DWTELEM * * data_stack; ///< Used for internal purposes.
  48     int data_stack_top;
  49     int line_count;
  50     int line_width;
  51     int data_count;
  52     DWTELEM * base_buffer; ///< Buffer that this structure is caching.
  53 };
  54
  55 #define liftS lift
  56 #define lift5 lift
  57 #if 1
  58 #define W_AM 3
  59 #define W_AO 0
  60 #define W_AS 1
  61
  62 #undef liftS
  63 #define W_BM 1
  64 #define W_BO 8
  65 #define W_BS 4
  66
  67 #define W_CM 1
  68 #define W_CO 0
  69 #define W_CS 0
  70
  71 #define W_DM 3
  72 #define W_DO 4
  73 #define W_DS 3
  74 #elif 0
  75 #define W_AM 55
  76 #define W_AO 16
  77 #define W_AS 5
  78
  79 #define W_BM 3
  80 #define W_BO 32
  81 #define W_BS 6
  82
  83 #define W_CM 127
  84 #define W_CO 64
  85 #define W_CS 7
  86
  87 #define W_DM 7
  88 #define W_DO 8
  89 #define W_DS 4
  90 #elif 0
  91 #define W_AM 97
  92 #define W_AO 32
  93 #define W_AS 6
  94
  95 #define W_BM 63
  96 #define W_BO 512
  97 #define W_BS 10
  98
  99 #define W_CM 13
 100 #define W_CO 8
 101 #define W_CS 4
 102
 103 #define W_DM 15
 104 #define W_DO 16
 105 #define W_DS 5
 106
 107 #else
 108
 109 #define W_AM 203
 110 #define W_AO 64
 111 #define W_AS 7
 112
 113 #define W_BM 217
 114 #define W_BO 2048
 115 #define W_BS 12
 116
 117 #define W_CM 113
 118 #define W_CO 64
 119 #define W_CS 7
 120
 121 #define W_DM 227
 122 #define W_DO 128
 123 #define W_DS 9
 124 #endif
 125
 126 extern void ff_snow_vertical_compose97i(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width);
 127 extern void ff_snow_horizontal_compose97i(DWTELEM *b, int width);
 128 extern void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8);
 129
 130 #ifdef CONFIG_SNOW_ENCODER
 131 int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
 132 int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
 133 #else
 134 static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
 135 static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
 136 #endif
 137
 138 /* C bits used by mmx/sse2/altivec */
 139
 140 static av_always_inline void snow_interleave_line_header(int * i, int width, DWTELEM * low, DWTELEM * high){
 141     (*i) = (width) - 2;
 142
 143     if (width & 1){
 144         low[(*i)+1] = low[((*i)+1)>>1];
 145         (*i)--;
 146     }
 147 }
 148
 149 static av_always_inline void snow_interleave_line_footer(int * i, DWTELEM * low, DWTELEM * high){
 150     for (; (*i)>=0; (*i)-=2){
 151         low[(*i)+1] = high[(*i)>>1];
 152         low[*i] = low[(*i)>>1];
 153     }
 154 }
 155
 156 static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
 157     for(; i<w; i++){
 158         dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
 159     }
 160
 161     if((width^lift_high)&1){
 162         dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
 163     }
 164 }
 165
 166 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){
 167         for(; i<w; i++){
 168             dst[i] = src[i] - (((-(ref[i] + ref[(i+1)])+W_BO) - 4 * src[i]) >> W_BS);
 169         }
 170
 171         if(width&1){
 172             dst[w] = src[w] - (((-2 * ref[w] + W_BO) - 4 * src[w]) >> W_BS);
 173         }
 174 }
 175
 176 #endif