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 inline int mirror(int v, int m)
  30 {
  31     while ((unsigned)v > (unsigned)m) {
  32         v = -v;
  33         if (v < 0)
  34             v += 2 * m;
  35     }
  36     return v;
  37 }
  38
  39 static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
  40                                   int width)
  41 {
  42     int i;
  43
  44     for (i = 0; i < width; i++)
  45         b1[i] -= (b0[i] + b2[i] + 2) >> 2;
  46 }
  47
  48
  49 static av_always_inline
  50 void interleave(IDWTELEM *dst, IDWTELEM *src0, IDWTELEM *src1, int w2, int add, int shift)
  51 {
  52     int i;
  53     for (i = 0; i < w2; i++) {
  54         dst[2*i  ] = (src0[i] + add) >> shift;
  55         dst[2*i+1] = (src1[i] + add) >> shift;
  56     }
  57 }
  58
  59 static void horizontal_compose_dirac53i(IDWTELEM *b, IDWTELEM *temp, int w)
  60 {
  61     const int w2 = w >> 1;
  62     int x;
  63
  64     temp[0] = COMPOSE_53iL0(b[w2], b[0], b[w2]);
  65     for (x = 1; x < w2; x++) {
  66         temp[x     ] = COMPOSE_53iL0     (b[x+w2-1], b[x     ], b[x+w2]);
  67         temp[x+w2-1] = COMPOSE_DIRAC53iH0(temp[x-1], b[x+w2-1], temp[x]);
  68     }
  69     temp[w-1] = COMPOSE_DIRAC53iH0(temp[w2-1], b[w-1], temp[w2-1]);
  70
  71     interleave(b, temp, temp+w2, w2, 1, 1);
  72 }
  73
  74 static void horizontal_compose_dd97i(IDWTELEM *b, IDWTELEM *tmp, int w)
  75 {
  76     const int w2 = w >> 1;
  77     int x;
  78
  79     tmp[0] = COMPOSE_53iL0(b[w2], b[0], b[w2]);
  80     for (x = 1; x < w2; x++)
  81         tmp[x] = COMPOSE_53iL0(b[x+w2-1], b[x], b[x+w2]);
  82
  83     // extend the edges
  84     tmp[-1]   = tmp[0];
  85     tmp[w2+1] = tmp[w2] = tmp[w2-1];
  86
  87     for (x = 0; x < w2; x++) {
  88         b[2*x  ] = (tmp[x] + 1)>>1;
  89         b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1;
  90     }
  91 }
  92
  93 static void horizontal_compose_dd137i(IDWTELEM *b, IDWTELEM *tmp, int w)
  94 {
  95     const int w2 = w >> 1;
  96     int x;
  97
  98     tmp[0] = COMPOSE_DD137iL0(b[w2], b[w2], b[0], b[w2  ], b[w2+1]);
  99     tmp[1] = COMPOSE_DD137iL0(b[w2], b[w2], b[1], b[w2+1], b[w2+2]);
 100     for (x = 2; x < w2-1; x++)
 101         tmp[x] = COMPOSE_DD137iL0(b[x+w2-2], b[x+w2-1], b[x], b[x+w2], b[x+w2+1]);
 102     tmp[w2-1] = COMPOSE_DD137iL0(b[w-3], b[w-2], b[w2-1], b[w-1], b[w-1]);
 103
 104     // extend the edges
 105     tmp[-1]   = tmp[0];
 106     tmp[w2+1] = tmp[w2] = tmp[w2-1];
 107
 108     for (x = 0; x < w2; x++) {
 109         b[2*x  ] = (tmp[x] + 1)>>1;
 110         b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1;
 111     }
 112 }
 113
 114 static av_always_inline
 115 void horizontal_compose_haari(IDWTELEM *b, IDWTELEM *temp, int w, int shift)
 116 {
 117     const int w2 = w >> 1;
 118     int x;
 119
 120     for (x = 0; x < w2; x++) {
 121         temp[x   ] = COMPOSE_HAARiL0(b[x   ], b[x+w2]);
 122         temp[x+w2] = COMPOSE_HAARiH0(b[x+w2], temp[x]);
 123     }
 124
 125     interleave(b, temp, temp+w2, w2, shift, shift);
 126 }
 127
 128 static void horizontal_compose_haar0i(IDWTELEM *b, IDWTELEM *temp, int w)
 129 {
 130     horizontal_compose_haari(b, temp, w, 0);
 131 }
 132
 133 static void horizontal_compose_haar1i(IDWTELEM *b, IDWTELEM *temp, int w)
 134 {
 135     horizontal_compose_haari(b, temp, w, 1);
 136 }
 137
 138 static void horizontal_compose_fidelityi(IDWTELEM *b, IDWTELEM *tmp, int w)
 139 {
 140     const int w2 = w >> 1;
 141     int i, x;
 142     IDWTELEM v[8];
 143
 144     for (x = 0; x < w2; x++) {
 145         for (i = 0; i < 8; i++)
 146             v[i] = b[av_clip(x-3+i, 0, w2-1)];
 147         tmp[x] = COMPOSE_FIDELITYiH0(v[0], v[1], v[2], v[3], b[x+w2], v[4], v[5], v[6], v[7]);
 148     }
 149
 150     for (x = 0; x < w2; x++) {
 151         for (i = 0; i < 8; i++)
 152             v[i] = tmp[av_clip(x-4+i, 0, w2-1)];
 153         tmp[x+w2] = COMPOSE_FIDELITYiL0(v[0], v[1], v[2], v[3], b[x], v[4], v[5], v[6], v[7]);
 154     }
 155
 156     interleave(b, tmp+w2, tmp, w2, 0, 0);
 157 }
 158
 159 static void horizontal_compose_daub97i(IDWTELEM *b, IDWTELEM *temp, int w)
 160 {
 161     const int w2 = w >> 1;
 162     int x, b0, b1, b2;
 163
 164     temp[0] = COMPOSE_DAUB97iL1(b[w2], b[0], b[w2]);
 165     for (x = 1; x < w2; x++) {
 166         temp[x     ] = COMPOSE_DAUB97iL1(b[x+w2-1], b[x     ], b[x+w2]);
 167         temp[x+w2-1] = COMPOSE_DAUB97iH1(temp[x-1], b[x+w2-1], temp[x]);
 168     }
 169     temp[w-1] = COMPOSE_DAUB97iH1(temp[w2-1], b[w-1], temp[w2-1]);
 170
 171     // second stage combined with interleave and shift
 172     b0 = b2 = COMPOSE_DAUB97iL0(temp[w2], temp[0], temp[w2]);
 173     b[0] = (b0 + 1) >> 1;
 174     for (x = 1; x < w2; x++) {
 175         b2 = COMPOSE_DAUB97iL0(temp[x+w2-1], temp[x     ], temp[x+w2]);
 176         b1 = COMPOSE_DAUB97iH0(          b0, temp[x+w2-1], b2        );
 177         b[2*x-1] = (b1 + 1) >> 1;
 178         b[2*x  ] = (b2 + 1) >> 1;
 179         b0 = b2;
 180     }
 181     b[w-1] = (COMPOSE_DAUB97iH0(b2, temp[w-1], b2) + 1) >> 1;
 182 }
 183
 184 static void vertical_compose_dirac53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
 185 {
 186     int i;
 187
 188     for(i=0; i<width; i++){
 189         b1[i] = COMPOSE_DIRAC53iH0(b0[i], b1[i], b2[i]);
 190     }
 191 }
 192
 193 static void vertical_compose_dd97iH0(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_DD97iH0(b0[i], b1[i], b2[i], b3[i], b4[i]);
 200     }
 201 }
 202
 203 static void vertical_compose_dd137iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 204                                       IDWTELEM *b3, IDWTELEM *b4, int width)
 205 {
 206     int i;
 207
 208     for(i=0; i<width; i++){
 209         b2[i] = COMPOSE_DD137iL0(b0[i], b1[i], b2[i], b3[i], b4[i]);
 210     }
 211 }
 212
 213 static void vertical_compose_haar(IDWTELEM *b0, IDWTELEM *b1, int width)
 214 {
 215     int i;
 216
 217     for (i = 0; i < width; i++) {
 218         b0[i] = COMPOSE_HAARiL0(b0[i], b1[i]);
 219         b1[i] = COMPOSE_HAARiH0(b1[i], b0[i]);
 220     }
 221 }
 222
 223 static void vertical_compose_fidelityiH0(IDWTELEM *dst, IDWTELEM *b[8], int width)
 224 {
 225     int i;
 226
 227     for(i=0; i<width; i++){
 228         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]);
 229     }
 230 }
 231
 232 static void vertical_compose_fidelityiL0(IDWTELEM *dst, IDWTELEM *b[8], int width)
 233 {
 234     int i;
 235
 236     for(i=0; i<width; i++){
 237         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]);
 238     }
 239 }
 240
 241 static void vertical_compose_daub97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
 242 {
 243     int i;
 244
 245     for(i=0; i<width; i++){
 246         b1[i] = COMPOSE_DAUB97iH0(b0[i], b1[i], b2[i]);
 247     }
 248 }
 249
 250 static void vertical_compose_daub97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
 251 {
 252     int i;
 253
 254     for(i=0; i<width; i++){
 255         b1[i] = COMPOSE_DAUB97iH1(b0[i], b1[i], b2[i]);
 256     }
 257 }
 258
 259 static void vertical_compose_daub97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
 260 {
 261     int i;
 262
 263     for(i=0; i<width; i++){
 264         b1[i] = COMPOSE_DAUB97iL0(b0[i], b1[i], b2[i]);
 265     }
 266 }
 267
 268 static void vertical_compose_daub97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
 269 {
 270     int i;
 271
 272     for(i=0; i<width; i++){
 273         b1[i] = COMPOSE_DAUB97iL1(b0[i], b1[i], b2[i]);
 274     }
 275 }
 276
 277
 278 static void spatial_compose_dd97i_dy(DWTContext *d, int level, int width, int height, int stride)
 279 {
 280     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
 281     vertical_compose_5tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
 282     DWTCompose *cs = d->cs + level;
 283
 284     int i, y = cs->y;
 285     IDWTELEM *b[8];
 286     for (i = 0; i < 6; i++)
 287         b[i] = cs->b[i];
 288     b[6] = d->buffer + av_clip(y+5, 0, height-2)*stride;
 289     b[7] = d->buffer + av_clip(y+6, 1, height-1)*stride;
 290
 291         if(y+5<(unsigned)height) vertical_compose_l0(      b[5], b[6], b[7],       width);
 292         if(y+1<(unsigned)height) vertical_compose_h0(b[0], b[2], b[3], b[4], b[6], width);
 293
 294         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
 295         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
 296
 297     for (i = 0; i < 6; i++)
 298         cs->b[i] = b[i+2];
 299     cs->y += 2;
 300 }
 301
 302 static void spatial_compose_dirac53i_dy(DWTContext *d, int level, int width, int height, int stride)
 303 {
 304     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
 305     vertical_compose_3tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
 306     DWTCompose *cs = d->cs + level;
 307
 308     int y= cs->y;
 309     IDWTELEM *b[4] = { cs->b[0], cs->b[1] };
 310     b[2] = d->buffer + mirror(y+1, height-1)*stride;
 311     b[3] = d->buffer + mirror(y+2, height-1)*stride;
 312
 313         if(y+1<(unsigned)height) vertical_compose_l0(b[1], b[2], b[3], width);
 314         if(y+0<(unsigned)height) vertical_compose_h0(b[0], b[1], b[2], width);
 315
 316         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
 317         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
 318
 319     cs->b[0] = b[2];
 320     cs->b[1] = b[3];
 321     cs->y += 2;
 322 }
 323
 324
 325 static void spatial_compose_dd137i_dy(DWTContext *d, int level, int width, int height, int stride)
 326 {
 327     vertical_compose_5tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
 328     vertical_compose_5tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
 329     DWTCompose *cs = d->cs + level;
 330
 331     int i, y = cs->y;
 332     IDWTELEM *b[10];
 333     for (i = 0; i < 8; i++)
 334         b[i] = cs->b[i];
 335     b[8] = d->buffer + av_clip(y+7, 0, height-2)*stride;
 336     b[9] = d->buffer + av_clip(y+8, 1, height-1)*stride;
 337
 338         if(y+5<(unsigned)height) vertical_compose_l0(b[3], b[5], b[6], b[7], b[9], width);
 339         if(y+1<(unsigned)height) vertical_compose_h0(b[0], b[2], b[3], b[4], b[6], width);
 340
 341         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
 342         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
 343
 344     for (i = 0; i < 8; i++)
 345         cs->b[i] = b[i+2];
 346     cs->y += 2;
 347 }
 348
 349 // haar makes the assumption that height is even (always true for dirac)
 350 static void spatial_compose_haari_dy(DWTContext *d, int level, int width, int height, int stride)
 351 {
 352     vertical_compose_2tap vertical_compose = (void*)d->vertical_compose;
 353     int y = d->cs[level].y;
 354     IDWTELEM *b0 = d->buffer + (y-1)*stride;
 355     IDWTELEM *b1 = d->buffer + (y  )*stride;
 356
 357     vertical_compose(b0, b1, width);
 358     d->horizontal_compose(b0, d->temp, width);
 359     d->horizontal_compose(b1, d->temp, width);
 360
 361     d->cs[level].y += 2;
 362 }
 363
 364 // Don't do sliced idwt for fidelity; the 9 tap filter makes it a bit annoying
 365 // Fortunately, this filter isn't used in practice.
 366 static void spatial_compose_fidelity(DWTContext *d, int level, int width, int height, int stride)
 367 {
 368     vertical_compose_9tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
 369     vertical_compose_9tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
 370     int i, y;
 371     IDWTELEM *b[8];
 372
 373     for (y = 1; y < height; y += 2) {
 374         for (i = 0; i < 8; i++)
 375             b[i] = d->buffer + av_clip((y-7 + 2*i), 0, height-2)*stride;
 376         vertical_compose_h0(d->buffer + y*stride, b, width);
 377     }
 378
 379     for (y = 0; y < height; y += 2) {
 380         for (i = 0; i < 8; i++)
 381             b[i] = d->buffer + av_clip((y-7 + 2*i), 1, height-1)*stride;
 382         vertical_compose_l0(d->buffer + y*stride, b, width);
 383     }
 384
 385     for (y = 0; y < height; y++)
 386         d->horizontal_compose(d->buffer + y*stride, d->temp, width);
 387
 388     d->cs[level].y = height+1;
 389 }
 390
 391 static void spatial_compose_daub97i_dy(DWTContext *d, int level, int width, int height, int stride)
 392 {
 393     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
 394     vertical_compose_3tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
 395     vertical_compose_3tap vertical_compose_l1 = (void*)d->vertical_compose_l1;
 396     vertical_compose_3tap vertical_compose_h1 = (void*)d->vertical_compose_h1;
 397     DWTCompose *cs = d->cs + level;
 398
 399     int i, y = cs->y;
 400     IDWTELEM *b[6];
 401     for (i = 0; i < 4; i++)
 402         b[i] = cs->b[i];
 403     b[4] = d->buffer + mirror(y+3, height-1)*stride;
 404     b[5] = d->buffer + mirror(y+4, height-1)*stride;
 405
 406         if(y+3<(unsigned)height) vertical_compose_l1(b[3], b[4], b[5], width);
 407         if(y+2<(unsigned)height) vertical_compose_h1(b[2], b[3], b[4], width);
 408         if(y+1<(unsigned)height) vertical_compose_l0(b[1], b[2], b[3], width);
 409         if(y+0<(unsigned)height) vertical_compose_h0(b[0], b[1], b[2], width);
 410
 411         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
 412         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
 413
 414     for (i = 0; i < 4; i++)
 415         cs->b[i] = b[i+2];
 416     cs->y += 2;
 417 }
 418
 419
 420 static void spatial_compose97i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
 421 {
 422     cs->b[0] = buffer + mirror(-3-1, height-1)*stride;
 423     cs->b[1] = buffer + mirror(-3  , height-1)*stride;
 424     cs->b[2] = buffer + mirror(-3+1, height-1)*stride;
 425     cs->b[3] = buffer + mirror(-3+2, height-1)*stride;
 426     cs->y = -3;
 427 }
 428
 429 static void spatial_compose53i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
 430 {
 431     cs->b[0] = buffer + mirror(-1-1, height-1)*stride;
 432     cs->b[1] = buffer + mirror(-1  , height-1)*stride;
 433     cs->y = -1;
 434 }
 435
 436 static void spatial_compose_dd97i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
 437 {
 438     cs->b[0] = buffer + av_clip(-5-1, 0, height-2)*stride;
 439     cs->b[1] = buffer + av_clip(-5  , 1, height-1)*stride;
 440     cs->b[2] = buffer + av_clip(-5+1, 0, height-2)*stride;
 441     cs->b[3] = buffer + av_clip(-5+2, 1, height-1)*stride;
 442     cs->b[4] = buffer + av_clip(-5+3, 0, height-2)*stride;
 443     cs->b[5] = buffer + av_clip(-5+4, 1, height-1)*stride;
 444     cs->y = -5;
 445 }
 446
 447 static void spatial_compose_dd137i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
 448 {
 449     cs->b[0] = buffer + av_clip(-5-1, 0, height-2)*stride;
 450     cs->b[1] = buffer + av_clip(-5  , 1, height-1)*stride;
 451     cs->b[2] = buffer + av_clip(-5+1, 0, height-2)*stride;
 452     cs->b[3] = buffer + av_clip(-5+2, 1, height-1)*stride;
 453     cs->b[4] = buffer + av_clip(-5+3, 0, height-2)*stride;
 454     cs->b[5] = buffer + av_clip(-5+4, 1, height-1)*stride;
 455     cs->b[6] = buffer + av_clip(-5+5, 0, height-2)*stride;
 456     cs->b[7] = buffer + av_clip(-5+6, 1, height-1)*stride;
 457     cs->y = -5;
 458 }
 459
 460 int ff_spatial_idwt_init2(DWTContext *d, IDWTELEM *buffer, int width, int height,
 461                           int stride, enum dwt_type type, int decomposition_count,
 462                           IDWTELEM *temp)
 463 {
 464     int level;
 465
 466     d->buffer = buffer;
 467     d->width = width;
 468     d->height = height;
 469     d->stride = stride;
 470     d->decomposition_count = decomposition_count;
 471     d->temp = temp + 8;
 472
 473     for(level=decomposition_count-1; level>=0; level--){
 474         int hl = height >> level;
 475         int stride_l = stride << level;
 476
 477         switch(type){
 478         case DWT_DIRAC_DD9_7:
 479             spatial_compose_dd97i_init(d->cs+level, buffer, hl, stride_l);
 480             break;
 481         case DWT_DIRAC_LEGALL5_3:
 482             spatial_compose53i_init2(d->cs+level, buffer, hl, stride_l);
 483             break;
 484         case DWT_DIRAC_DD13_7:
 485             spatial_compose_dd137i_init(d->cs+level, buffer, hl, stride_l);
 486             break;
 487         case DWT_DIRAC_HAAR0:
 488         case DWT_DIRAC_HAAR1:
 489             d->cs[level].y = 1;
 490             break;
 491         case DWT_DIRAC_DAUB9_7:
 492             spatial_compose97i_init2(d->cs+level, buffer, hl, stride_l);
 493             break;
 494         default:
 495             d->cs[level].y = 0;
 496             break;
 497         }
 498     }
 499
 500     switch (type) {
 501     case DWT_DIRAC_DD9_7:
 502         d->spatial_compose = spatial_compose_dd97i_dy;
 503         d->vertical_compose_l0 = (void*)vertical_compose53iL0;
 504         d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
 505         d->horizontal_compose = horizontal_compose_dd97i;
 506         d->support = 7;
 507         break;
 508     case DWT_DIRAC_LEGALL5_3:
 509         d->spatial_compose = spatial_compose_dirac53i_dy;
 510         d->vertical_compose_l0 = (void*)vertical_compose53iL0;
 511         d->vertical_compose_h0 = (void*)vertical_compose_dirac53iH0;
 512         d->horizontal_compose = horizontal_compose_dirac53i;
 513         d->support = 3;
 514         break;
 515     case DWT_DIRAC_DD13_7:
 516         d->spatial_compose = spatial_compose_dd137i_dy;
 517         d->vertical_compose_l0 = (void*)vertical_compose_dd137iL0;
 518         d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
 519         d->horizontal_compose = horizontal_compose_dd137i;
 520         d->support = 7;
 521         break;
 522     case DWT_DIRAC_HAAR0:
 523     case DWT_DIRAC_HAAR1:
 524         d->spatial_compose = spatial_compose_haari_dy;
 525         d->vertical_compose = (void*)vertical_compose_haar;
 526         if (type == DWT_DIRAC_HAAR0)
 527             d->horizontal_compose = horizontal_compose_haar0i;
 528         else
 529             d->horizontal_compose = horizontal_compose_haar1i;
 530         d->support = 1;
 531         break;
 532     case DWT_DIRAC_FIDELITY:
 533         d->spatial_compose = spatial_compose_fidelity;
 534         d->vertical_compose_l0 = (void*)vertical_compose_fidelityiL0;
 535         d->vertical_compose_h0 = (void*)vertical_compose_fidelityiH0;
 536         d->horizontal_compose = horizontal_compose_fidelityi;
 537         d->support = 0; // not really used
 538         break;
 539     case DWT_DIRAC_DAUB9_7:
 540         d->spatial_compose = spatial_compose_daub97i_dy;
 541         d->vertical_compose_l0 = (void*)vertical_compose_daub97iL0;
 542         d->vertical_compose_h0 = (void*)vertical_compose_daub97iH0;
 543         d->vertical_compose_l1 = (void*)vertical_compose_daub97iL1;
 544         d->vertical_compose_h1 = (void*)vertical_compose_daub97iH1;
 545         d->horizontal_compose = horizontal_compose_daub97i;
 546         d->support = 5;
 547         break;
 548     default:
 549         av_log(NULL, AV_LOG_ERROR, "Unknown wavelet type %d\n", type);
 550         return -1;
 551     }
 552
 553     if (HAVE_MMX) ff_spatial_idwt_init_mmx(d, type);
 554
 555     return 0;
 556 }
 557
 558 void ff_spatial_idwt_slice2(DWTContext *d, int y)
 559 {
 560     int level, support = d->support;
 561
 562     for (level = d->decomposition_count-1; level >= 0; level--) {
 563         int wl = d->width  >> level;
 564         int hl = d->height >> level;
 565         int stride_l = d->stride << level;
 566
 567         while (d->cs[level].y <= FFMIN((y>>level)+support, hl))
 568             d->spatial_compose(d, level, wl, hl, stride_l);
 569     }
 570 }
 571