git.sesse.net Git - ffmpeg/blob - libavcodec/dirac_dwt.c

   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