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 AVCODEC_SNOW_H
  23 #define AVCODEC_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 4
  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
  43 /** Used to minimize the amount of memory used in order to optimize cache performance. **/
  44 struct slice_buffer_s {
  45     IDWTELEM * * line; ///< For use by idwt and predict_slices.
  46     IDWTELEM * * data_stack; ///< Used for internal purposes.
  47     int data_stack_top;
  48     int line_count;
  49     int line_width;
  50     int data_count;
  51     IDWTELEM * base_buffer; ///< Buffer that this structure is caching.
  52 };
  53
  54 #define liftS lift
  55 #if 1
  56 #define W_AM 3
  57 #define W_AO 0
  58 #define W_AS 1
  59
  60 #undef liftS
  61 #define W_BM 1
  62 #define W_BO 8
  63 #define W_BS 4
  64
  65 #define W_CM 1
  66 #define W_CO 0
  67 #define W_CS 0
  68
  69 #define W_DM 3
  70 #define W_DO 4
  71 #define W_DS 3
  72 #elif 0
  73 #define W_AM 55
  74 #define W_AO 16
  75 #define W_AS 5
  76
  77 #define W_BM 3
  78 #define W_BO 32
  79 #define W_BS 6
  80
  81 #define W_CM 127
  82 #define W_CO 64
  83 #define W_CS 7
  84
  85 #define W_DM 7
  86 #define W_DO 8
  87 #define W_DS 4
  88 #elif 0
  89 #define W_AM 97
  90 #define W_AO 32
  91 #define W_AS 6
  92
  93 #define W_BM 63
  94 #define W_BO 512
  95 #define W_BS 10
  96
  97 #define W_CM 13
  98 #define W_CO 8
  99 #define W_CS 4
 100
 101 #define W_DM 15
 102 #define W_DO 16
 103 #define W_DS 5
 104
 105 #else
 106
 107 #define W_AM 203
 108 #define W_AO 64
 109 #define W_AS 7
 110
 111 #define W_BM 217
 112 #define W_BO 2048
 113 #define W_BS 12
 114
 115 #define W_CM 113
 116 #define W_CO 64
 117 #define W_CS 7
 118
 119 #define W_DM 227
 120 #define W_DO 128
 121 #define W_DS 9
 122 #endif
 123
 124 void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, int width);
 125 void ff_snow_horizontal_compose97i(IDWTELEM *b, int width);
 126 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);
 127
 128 #if CONFIG_SNOW_ENCODER
 129 int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
 130 int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
 131 #else
 132 static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0); return 0;}
 133 static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0); return 0;}
 134 #endif
 135
 136 /* C bits used by mmx/sse2/altivec */
 137
 138 static av_always_inline void snow_interleave_line_header(int * i, int width, IDWTELEM * low, IDWTELEM * high){
 139     (*i) = (width) - 2;
 140
 141     if (width & 1){
 142         low[(*i)+1] = low[((*i)+1)>>1];
 143         (*i)--;
 144     }
 145 }
 146
 147 static av_always_inline void snow_interleave_line_footer(int * i, IDWTELEM * low, IDWTELEM * high){
 148     for (; (*i)>=0; (*i)-=2){
 149         low[(*i)+1] = high[(*i)>>1];
 150         low[*i] = low[(*i)>>1];
 151     }
 152 }
 153
 154 static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
 155     for(; i<w; i++){
 156         dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
 157     }
 158
 159     if((width^lift_high)&1){
 160         dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
 161     }
 162 }
 163
 164 static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, IDWTELEM * dst, IDWTELEM * src, IDWTELEM * ref, int width, int w){
 165         for(; i<w; i++){
 166             dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
 167         }
 168
 169         if(width&1){
 170             dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
 171         }
 172 }
 173
 174 #endif /* AVCODEC_SNOW_H */