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  1. /*
  2.  * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
  3.  * Copyright (C) 2008 David Conrad
  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. #include "libavutil/attributes.h"
  23. #include "libavutil/avassert.h"
  24. #include "libavutil/common.h"
  25. #include "dirac_dwt.h"
  26. #include "libavcodec/x86/dirac_dwt.h"
  27.  
  28.  
  29. static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
  30.                                   int width)
  31. {
  32.     int i;
  33.  
  34.     for (i = 0; i < width; i++)
  35.         b1[i] -= (b0[i] + b2[i] + 2) >> 2;
  36. }
  37.  
  38.  
  39. static av_always_inline
  40. void interleave(IDWTELEM *dst, IDWTELEM *src0, IDWTELEM *src1, int w2, int add, int shift)
  41. {
  42.     int i;
  43.     for (i = 0; i < w2; i++) {
  44.         dst[2*i  ] = (src0[i] + add) >> shift;
  45.         dst[2*i+1] = (src1[i] + add) >> shift;
  46.     }
  47. }
  48.  
  49. static void horizontal_compose_dirac53i(IDWTELEM *b, IDWTELEM *temp, int w)
  50. {
  51.     const int w2 = w >> 1;
  52.     int x;
  53.  
  54.     temp[0] = COMPOSE_53iL0(b[w2], b[0], b[w2]);
  55.     for (x = 1; x < w2; x++) {
  56.         temp[x     ] = COMPOSE_53iL0     (b[x+w2-1], b[x     ], b[x+w2]);
  57.         temp[x+w2-1] = COMPOSE_DIRAC53iH0(temp[x-1], b[x+w2-1], temp[x]);
  58.     }
  59.     temp[w-1] = COMPOSE_DIRAC53iH0(temp[w2-1], b[w-1], temp[w2-1]);
  60.  
  61.     interleave(b, temp, temp+w2, w2, 1, 1);
  62. }
  63.  
  64. static void horizontal_compose_dd97i(IDWTELEM *b, IDWTELEM *tmp, int w)
  65. {
  66.     const int w2 = w >> 1;
  67.     int x;
  68.  
  69.     tmp[0] = COMPOSE_53iL0(b[w2], b[0], b[w2]);
  70.     for (x = 1; x < w2; x++)
  71.         tmp[x] = COMPOSE_53iL0(b[x+w2-1], b[x], b[x+w2]);
  72.  
  73.     // extend the edges
  74.     tmp[-1]   = tmp[0];
  75.     tmp[w2+1] = tmp[w2] = tmp[w2-1];
  76.  
  77.     for (x = 0; x < w2; x++) {
  78.         b[2*x  ] = (tmp[x] + 1)>>1;
  79.         b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1;
  80.     }
  81. }
  82.  
  83. static void horizontal_compose_dd137i(IDWTELEM *b, IDWTELEM *tmp, int w)
  84. {
  85.     const int w2 = w >> 1;
  86.     int x;
  87.  
  88.     tmp[0] = COMPOSE_DD137iL0(b[w2], b[w2], b[0], b[w2  ], b[w2+1]);
  89.     tmp[1] = COMPOSE_DD137iL0(b[w2], b[w2], b[1], b[w2+1], b[w2+2]);
  90.     for (x = 2; x < w2-1; x++)
  91.         tmp[x] = COMPOSE_DD137iL0(b[x+w2-2], b[x+w2-1], b[x], b[x+w2], b[x+w2+1]);
  92.     tmp[w2-1] = COMPOSE_DD137iL0(b[w-3], b[w-2], b[w2-1], b[w-1], b[w-1]);
  93.  
  94.     // extend the edges
  95.     tmp[-1]   = tmp[0];
  96.     tmp[w2+1] = tmp[w2] = tmp[w2-1];
  97.  
  98.     for (x = 0; x < w2; x++) {
  99.         b[2*x  ] = (tmp[x] + 1)>>1;
  100.         b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1;
  101.     }
  102. }
  103.  
  104. static av_always_inline
  105. void horizontal_compose_haari(IDWTELEM *b, IDWTELEM *temp, int w, int shift)
  106. {
  107.     const int w2 = w >> 1;
  108.     int x;
  109.  
  110.     for (x = 0; x < w2; x++) {
  111.         temp[x   ] = COMPOSE_HAARiL0(b[x   ], b[x+w2]);
  112.         temp[x+w2] = COMPOSE_HAARiH0(b[x+w2], temp[x]);
  113.     }
  114.  
  115.     interleave(b, temp, temp+w2, w2, shift, shift);
  116. }
  117.  
  118. static void horizontal_compose_haar0i(IDWTELEM *b, IDWTELEM *temp, int w)
  119. {
  120.     horizontal_compose_haari(b, temp, w, 0);
  121. }
  122.  
  123. static void horizontal_compose_haar1i(IDWTELEM *b, IDWTELEM *temp, int w)
  124. {
  125.     horizontal_compose_haari(b, temp, w, 1);
  126. }
  127.  
  128. static void horizontal_compose_fidelityi(IDWTELEM *b, IDWTELEM *tmp, int w)
  129. {
  130.     const int w2 = w >> 1;
  131.     int i, x;
  132.     IDWTELEM v[8];
  133.  
  134.     for (x = 0; x < w2; x++) {
  135.         for (i = 0; i < 8; i++)
  136.             v[i] = b[av_clip(x-3+i, 0, w2-1)];
  137.         tmp[x] = COMPOSE_FIDELITYiH0(v[0], v[1], v[2], v[3], b[x+w2], v[4], v[5], v[6], v[7]);
  138.     }
  139.  
  140.     for (x = 0; x < w2; x++) {
  141.         for (i = 0; i < 8; i++)
  142.             v[i] = tmp[av_clip(x-4+i, 0, w2-1)];
  143.         tmp[x+w2] = COMPOSE_FIDELITYiL0(v[0], v[1], v[2], v[3], b[x], v[4], v[5], v[6], v[7]);
  144.     }
  145.  
  146.     interleave(b, tmp+w2, tmp, w2, 0, 0);
  147. }
  148.  
  149. static void horizontal_compose_daub97i(IDWTELEM *b, IDWTELEM *temp, int w)
  150. {
  151.     const int w2 = w >> 1;
  152.     int x, b0, b1, b2;
  153.  
  154.     temp[0] = COMPOSE_DAUB97iL1(b[w2], b[0], b[w2]);
  155.     for (x = 1; x < w2; x++) {
  156.         temp[x     ] = COMPOSE_DAUB97iL1(b[x+w2-1], b[x     ], b[x+w2]);
  157.         temp[x+w2-1] = COMPOSE_DAUB97iH1(temp[x-1], b[x+w2-1], temp[x]);
  158.     }
  159.     temp[w-1] = COMPOSE_DAUB97iH1(temp[w2-1], b[w-1], temp[w2-1]);
  160.  
  161.     // second stage combined with interleave and shift
  162.     b0 = b2 = COMPOSE_DAUB97iL0(temp[w2], temp[0], temp[w2]);
  163.     b[0] = (b0 + 1) >> 1;
  164.     for (x = 1; x < w2; x++) {
  165.         b2 = COMPOSE_DAUB97iL0(temp[x+w2-1], temp[x     ], temp[x+w2]);
  166.         b1 = COMPOSE_DAUB97iH0(          b0, temp[x+w2-1], b2        );
  167.         b[2*x-1] = (b1 + 1) >> 1;
  168.         b[2*x  ] = (b2 + 1) >> 1;
  169.         b0 = b2;
  170.     }
  171.     b[w-1] = (COMPOSE_DAUB97iH0(b2, temp[w-1], b2) + 1) >> 1;
  172. }
  173.  
  174. static void vertical_compose_dirac53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
  175. {
  176.     int i;
  177.  
  178.     for(i=0; i<width; i++){
  179.         b1[i] = COMPOSE_DIRAC53iH0(b0[i], b1[i], b2[i]);
  180.     }
  181. }
  182.  
  183. static void vertical_compose_dd97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
  184.                                   IDWTELEM *b3, IDWTELEM *b4, int width)
  185. {
  186.     int i;
  187.  
  188.     for(i=0; i<width; i++){
  189.         b2[i] = COMPOSE_DD97iH0(b0[i], b1[i], b2[i], b3[i], b4[i]);
  190.     }
  191. }
  192.  
  193. static void vertical_compose_dd137iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
  194.                                       IDWTELEM *b3, IDWTELEM *b4, int width)
  195. {
  196.     int i;
  197.  
  198.     for(i=0; i<width; i++){
  199.         b2[i] = COMPOSE_DD137iL0(b0[i], b1[i], b2[i], b3[i], b4[i]);
  200.     }
  201. }
  202.  
  203. static void vertical_compose_haar(IDWTELEM *b0, IDWTELEM *b1, int width)
  204. {
  205.     int i;
  206.  
  207.     for (i = 0; i < width; i++) {
  208.         b0[i] = COMPOSE_HAARiL0(b0[i], b1[i]);
  209.         b1[i] = COMPOSE_HAARiH0(b1[i], b0[i]);
  210.     }
  211. }
  212.  
  213. static void vertical_compose_fidelityiH0(IDWTELEM *dst, IDWTELEM *b[8], int width)
  214. {
  215.     int i;
  216.  
  217.     for(i=0; i<width; i++){
  218.         dst[i] = COMPOSE_FIDELITYiH0(b[0][i], b[1][i], b[2][i], b[3][i], dst[i], b[4][i], b[5][i], b[6][i], b[7][i]);
  219.     }
  220. }
  221.  
  222. static void vertical_compose_fidelityiL0(IDWTELEM *dst, IDWTELEM *b[8], int width)
  223. {
  224.     int i;
  225.  
  226.     for(i=0; i<width; i++){
  227.         dst[i] = COMPOSE_FIDELITYiL0(b[0][i], b[1][i], b[2][i], b[3][i], dst[i], b[4][i], b[5][i], b[6][i], b[7][i]);
  228.     }
  229. }
  230.  
  231. static void vertical_compose_daub97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
  232. {
  233.     int i;
  234.  
  235.     for(i=0; i<width; i++){
  236.         b1[i] = COMPOSE_DAUB97iH0(b0[i], b1[i], b2[i]);
  237.     }
  238. }
  239.  
  240. static void vertical_compose_daub97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
  241. {
  242.     int i;
  243.  
  244.     for(i=0; i<width; i++){
  245.         b1[i] = COMPOSE_DAUB97iH1(b0[i], b1[i], b2[i]);
  246.     }
  247. }
  248.  
  249. static void vertical_compose_daub97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
  250. {
  251.     int i;
  252.  
  253.     for(i=0; i<width; i++){
  254.         b1[i] = COMPOSE_DAUB97iL0(b0[i], b1[i], b2[i]);
  255.     }
  256. }
  257.  
  258. static void vertical_compose_daub97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
  259. {
  260.     int i;
  261.  
  262.     for(i=0; i<width; i++){
  263.         b1[i] = COMPOSE_DAUB97iL1(b0[i], b1[i], b2[i]);
  264.     }
  265. }
  266.  
  267.  
  268. static void spatial_compose_dd97i_dy(DWTContext *d, int level, int width, int height, int stride)
  269. {
  270.     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
  271.     vertical_compose_5tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
  272.     DWTCompose *cs = d->cs + level;
  273.  
  274.     int i, y = cs->y;
  275.     IDWTELEM *b[8];
  276.     for (i = 0; i < 6; i++)
  277.         b[i] = cs->b[i];
  278.     b[6] = d->buffer + av_clip(y+5, 0, height-2)*stride;
  279.     b[7] = d->buffer + av_clip(y+6, 1, height-1)*stride;
  280.  
  281.         if(y+5<(unsigned)height) vertical_compose_l0(      b[5], b[6], b[7],       width);
  282.         if(y+1<(unsigned)height) vertical_compose_h0(b[0], b[2], b[3], b[4], b[6], width);
  283.  
  284.         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
  285.         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
  286.  
  287.     for (i = 0; i < 6; i++)
  288.         cs->b[i] = b[i+2];
  289.     cs->y += 2;
  290. }
  291.  
  292. static void spatial_compose_dirac53i_dy(DWTContext *d, int level, int width, int height, int stride)
  293. {
  294.     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
  295.     vertical_compose_3tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
  296.     DWTCompose *cs = d->cs + level;
  297.  
  298.     int y= cs->y;
  299.     IDWTELEM *b[4] = { cs->b[0], cs->b[1] };
  300.     b[2] = d->buffer + avpriv_mirror(y+1, height-1)*stride;
  301.     b[3] = d->buffer + avpriv_mirror(y+2, height-1)*stride;
  302.  
  303.         if(y+1<(unsigned)height) vertical_compose_l0(b[1], b[2], b[3], width);
  304.         if(y+0<(unsigned)height) vertical_compose_h0(b[0], b[1], b[2], width);
  305.  
  306.         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
  307.         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
  308.  
  309.     cs->b[0] = b[2];
  310.     cs->b[1] = b[3];
  311.     cs->y += 2;
  312. }
  313.  
  314.  
  315. static void spatial_compose_dd137i_dy(DWTContext *d, int level, int width, int height, int stride)
  316. {
  317.     vertical_compose_5tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
  318.     vertical_compose_5tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
  319.     DWTCompose *cs = d->cs + level;
  320.  
  321.     int i, y = cs->y;
  322.     IDWTELEM *b[10];
  323.     for (i = 0; i < 8; i++)
  324.         b[i] = cs->b[i];
  325.     b[8] = d->buffer + av_clip(y+7, 0, height-2)*stride;
  326.     b[9] = d->buffer + av_clip(y+8, 1, height-1)*stride;
  327.  
  328.         if(y+5<(unsigned)height) vertical_compose_l0(b[3], b[5], b[6], b[7], b[9], width);
  329.         if(y+1<(unsigned)height) vertical_compose_h0(b[0], b[2], b[3], b[4], b[6], width);
  330.  
  331.         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
  332.         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
  333.  
  334.     for (i = 0; i < 8; i++)
  335.         cs->b[i] = b[i+2];
  336.     cs->y += 2;
  337. }
  338.  
  339. // haar makes the assumption that height is even (always true for dirac)
  340. static void spatial_compose_haari_dy(DWTContext *d, int level, int width, int height, int stride)
  341. {
  342.     vertical_compose_2tap vertical_compose = (void*)d->vertical_compose;
  343.     int y = d->cs[level].y;
  344.     IDWTELEM *b0 = d->buffer + (y-1)*stride;
  345.     IDWTELEM *b1 = d->buffer + (y  )*stride;
  346.  
  347.     vertical_compose(b0, b1, width);
  348.     d->horizontal_compose(b0, d->temp, width);
  349.     d->horizontal_compose(b1, d->temp, width);
  350.  
  351.     d->cs[level].y += 2;
  352. }
  353.  
  354. // Don't do sliced idwt for fidelity; the 9 tap filter makes it a bit annoying
  355. // Fortunately, this filter isn't used in practice.
  356. static void spatial_compose_fidelity(DWTContext *d, int level, int width, int height, int stride)
  357. {
  358.     vertical_compose_9tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
  359.     vertical_compose_9tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
  360.     int i, y;
  361.     IDWTELEM *b[8];
  362.  
  363.     for (y = 1; y < height; y += 2) {
  364.         for (i = 0; i < 8; i++)
  365.             b[i] = d->buffer + av_clip((y-7 + 2*i), 0, height-2)*stride;
  366.         vertical_compose_h0(d->buffer + y*stride, b, width);
  367.     }
  368.  
  369.     for (y = 0; y < height; y += 2) {
  370.         for (i = 0; i < 8; i++)
  371.             b[i] = d->buffer + av_clip((y-7 + 2*i), 1, height-1)*stride;
  372.         vertical_compose_l0(d->buffer + y*stride, b, width);
  373.     }
  374.  
  375.     for (y = 0; y < height; y++)
  376.         d->horizontal_compose(d->buffer + y*stride, d->temp, width);
  377.  
  378.     d->cs[level].y = height+1;
  379. }
  380.  
  381. static void spatial_compose_daub97i_dy(DWTContext *d, int level, int width, int height, int stride)
  382. {
  383.     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
  384.     vertical_compose_3tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
  385.     vertical_compose_3tap vertical_compose_l1 = (void*)d->vertical_compose_l1;
  386.     vertical_compose_3tap vertical_compose_h1 = (void*)d->vertical_compose_h1;
  387.     DWTCompose *cs = d->cs + level;
  388.  
  389.     int i, y = cs->y;
  390.     IDWTELEM *b[6];
  391.     for (i = 0; i < 4; i++)
  392.         b[i] = cs->b[i];
  393.     b[4] = d->buffer + avpriv_mirror(y+3, height-1)*stride;
  394.     b[5] = d->buffer + avpriv_mirror(y+4, height-1)*stride;
  395.  
  396.         if(y+3<(unsigned)height) vertical_compose_l1(b[3], b[4], b[5], width);
  397.         if(y+2<(unsigned)height) vertical_compose_h1(b[2], b[3], b[4], width);
  398.         if(y+1<(unsigned)height) vertical_compose_l0(b[1], b[2], b[3], width);
  399.         if(y+0<(unsigned)height) vertical_compose_h0(b[0], b[1], b[2], width);
  400.  
  401.         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
  402.         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
  403.  
  404.     for (i = 0; i < 4; i++)
  405.         cs->b[i] = b[i+2];
  406.     cs->y += 2;
  407. }
  408.  
  409.  
  410. static void spatial_compose97i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
  411. {
  412.     cs->b[0] = buffer + avpriv_mirror(-3-1, height-1)*stride;
  413.     cs->b[1] = buffer + avpriv_mirror(-3  , height-1)*stride;
  414.     cs->b[2] = buffer + avpriv_mirror(-3+1, height-1)*stride;
  415.     cs->b[3] = buffer + avpriv_mirror(-3+2, height-1)*stride;
  416.     cs->y = -3;
  417. }
  418.  
  419. static void spatial_compose53i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
  420. {
  421.     cs->b[0] = buffer + avpriv_mirror(-1-1, height-1)*stride;
  422.     cs->b[1] = buffer + avpriv_mirror(-1  , height-1)*stride;
  423.     cs->y = -1;
  424. }
  425.  
  426. static void spatial_compose_dd97i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
  427. {
  428.     cs->b[0] = buffer + av_clip(-5-1, 0, height-2)*stride;
  429.     cs->b[1] = buffer + av_clip(-5  , 1, height-1)*stride;
  430.     cs->b[2] = buffer + av_clip(-5+1, 0, height-2)*stride;
  431.     cs->b[3] = buffer + av_clip(-5+2, 1, height-1)*stride;
  432.     cs->b[4] = buffer + av_clip(-5+3, 0, height-2)*stride;
  433.     cs->b[5] = buffer + av_clip(-5+4, 1, height-1)*stride;
  434.     cs->y = -5;
  435. }
  436.  
  437. static void spatial_compose_dd137i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
  438. {
  439.     cs->b[0] = buffer + av_clip(-5-1, 0, height-2)*stride;
  440.     cs->b[1] = buffer + av_clip(-5  , 1, height-1)*stride;
  441.     cs->b[2] = buffer + av_clip(-5+1, 0, height-2)*stride;
  442.     cs->b[3] = buffer + av_clip(-5+2, 1, height-1)*stride;
  443.     cs->b[4] = buffer + av_clip(-5+3, 0, height-2)*stride;
  444.     cs->b[5] = buffer + av_clip(-5+4, 1, height-1)*stride;
  445.     cs->b[6] = buffer + av_clip(-5+5, 0, height-2)*stride;
  446.     cs->b[7] = buffer + av_clip(-5+6, 1, height-1)*stride;
  447.     cs->y = -5;
  448. }
  449.  
  450. int ff_spatial_idwt_init2(DWTContext *d, IDWTELEM *buffer, int width, int height,
  451.                           int stride, enum dwt_type type, int decomposition_count,
  452.                           IDWTELEM *temp)
  453. {
  454.     int level;
  455.  
  456.     d->buffer = buffer;
  457.     d->width = width;
  458.     d->height = height;
  459.     d->stride = stride;
  460.     d->decomposition_count = decomposition_count;
  461.     d->temp = temp + 8;
  462.  
  463.     for(level=decomposition_count-1; level>=0; level--){
  464.         int hl = height >> level;
  465.         int stride_l = stride << level;
  466.  
  467.         switch(type){
  468.         case DWT_DIRAC_DD9_7:
  469.             spatial_compose_dd97i_init(d->cs+level, buffer, hl, stride_l);
  470.             break;
  471.         case DWT_DIRAC_LEGALL5_3:
  472.             spatial_compose53i_init2(d->cs+level, buffer, hl, stride_l);
  473.             break;
  474.         case DWT_DIRAC_DD13_7:
  475.             spatial_compose_dd137i_init(d->cs+level, buffer, hl, stride_l);
  476.             break;
  477.         case DWT_DIRAC_HAAR0:
  478.         case DWT_DIRAC_HAAR1:
  479.             d->cs[level].y = 1;
  480.             break;
  481.         case DWT_DIRAC_DAUB9_7:
  482.             spatial_compose97i_init2(d->cs+level, buffer, hl, stride_l);
  483.             break;
  484.         default:
  485.             d->cs[level].y = 0;
  486.             break;
  487.         }
  488.     }
  489.  
  490.     switch (type) {
  491.     case DWT_DIRAC_DD9_7:
  492.         d->spatial_compose = spatial_compose_dd97i_dy;
  493.         d->vertical_compose_l0 = (void*)vertical_compose53iL0;
  494.         d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
  495.         d->horizontal_compose = horizontal_compose_dd97i;
  496.         d->support = 7;
  497.         break;
  498.     case DWT_DIRAC_LEGALL5_3:
  499.         d->spatial_compose = spatial_compose_dirac53i_dy;
  500.         d->vertical_compose_l0 = (void*)vertical_compose53iL0;
  501.         d->vertical_compose_h0 = (void*)vertical_compose_dirac53iH0;
  502.         d->horizontal_compose = horizontal_compose_dirac53i;
  503.         d->support = 3;
  504.         break;
  505.     case DWT_DIRAC_DD13_7:
  506.         d->spatial_compose = spatial_compose_dd137i_dy;
  507.         d->vertical_compose_l0 = (void*)vertical_compose_dd137iL0;
  508.         d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
  509.         d->horizontal_compose = horizontal_compose_dd137i;
  510.         d->support = 7;
  511.         break;
  512.     case DWT_DIRAC_HAAR0:
  513.     case DWT_DIRAC_HAAR1:
  514.         d->spatial_compose = spatial_compose_haari_dy;
  515.         d->vertical_compose = (void*)vertical_compose_haar;
  516.         if (type == DWT_DIRAC_HAAR0)
  517.             d->horizontal_compose = horizontal_compose_haar0i;
  518.         else
  519.             d->horizontal_compose = horizontal_compose_haar1i;
  520.         d->support = 1;
  521.         break;
  522.     case DWT_DIRAC_FIDELITY:
  523.         d->spatial_compose = spatial_compose_fidelity;
  524.         d->vertical_compose_l0 = (void*)vertical_compose_fidelityiL0;
  525.         d->vertical_compose_h0 = (void*)vertical_compose_fidelityiH0;
  526.         d->horizontal_compose = horizontal_compose_fidelityi;
  527.         d->support = 0; // not really used
  528.         break;
  529.     case DWT_DIRAC_DAUB9_7:
  530.         d->spatial_compose = spatial_compose_daub97i_dy;
  531.         d->vertical_compose_l0 = (void*)vertical_compose_daub97iL0;
  532.         d->vertical_compose_h0 = (void*)vertical_compose_daub97iH0;
  533.         d->vertical_compose_l1 = (void*)vertical_compose_daub97iL1;
  534.         d->vertical_compose_h1 = (void*)vertical_compose_daub97iH1;
  535.         d->horizontal_compose = horizontal_compose_daub97i;
  536.         d->support = 5;
  537.         break;
  538.     default:
  539.         av_log(NULL, AV_LOG_ERROR, "Unknown wavelet type %d\n", type);
  540.         return AVERROR_INVALIDDATA;
  541.     }
  542.  
  543.     if (HAVE_MMX) ff_spatial_idwt_init_mmx(d, type);
  544.  
  545.     return 0;
  546. }
  547.  
  548. void ff_spatial_idwt_slice2(DWTContext *d, int y)
  549. {
  550.     int level, support = d->support;
  551.  
  552.     for (level = d->decomposition_count-1; level >= 0; level--) {
  553.         int wl = d->width  >> level;
  554.         int hl = d->height >> level;
  555.         int stride_l = d->stride << level;
  556.  
  557.         while (d->cs[level].y <= FFMIN((y>>level)+support, hl))
  558.             d->spatial_compose(d, level, wl, hl, stride_l);
  559.     }
  560. }
  561.  
  562.