git.sesse.net Git - ffmpeg/blob - libavcodec/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 "dsputil.h"
  26 #include "dwt.h"
  27 #include "libavcodec/x86/dwt.h"
  28
  29 int ff_slice_buffer_init(slice_buffer *buf, int line_count,
  30                          int max_allocated_lines, int line_width,
  31                          IDWTELEM *base_buffer)
  32 {
  33     int i;
  34
  35     buf->base_buffer = base_buffer;
  36     buf->line_count  = line_count;
  37     buf->line_width  = line_width;
  38     buf->data_count  = max_allocated_lines;
  39     buf->line        = av_mallocz(sizeof(IDWTELEM *) * line_count);
  40     if (!buf->line)
  41         return AVERROR(ENOMEM);
  42     buf->data_stack  = av_malloc(sizeof(IDWTELEM *) * max_allocated_lines);
  43     if (!buf->data_stack) {
  44         av_freep(&buf->line);
  45         return AVERROR(ENOMEM);
  46     }
  47
  48     for (i = 0; i < max_allocated_lines; i++) {
  49         buf->data_stack[i] = av_malloc(sizeof(IDWTELEM) * line_width);
  50         if (!buf->data_stack[i]) {
  51             for (i--; i >=0; i--)
  52                 av_freep(&buf->data_stack[i]);
  53             av_freep(&buf->data_stack);
  54             av_freep(&buf->line);
  55             return AVERROR(ENOMEM);
  56         }
  57     }
  58
  59     buf->data_stack_top = max_allocated_lines - 1;
  60     return 0;
  61 }
  62
  63 IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line)
  64 {
  65     IDWTELEM *buffer;
  66
  67     av_assert0(buf->data_stack_top >= 0);
  68 //  av_assert1(!buf->line[line]);
  69     if (buf->line[line])
  70         return buf->line[line];
  71
  72     buffer = buf->data_stack[buf->data_stack_top];
  73     buf->data_stack_top--;
  74     buf->line[line] = buffer;
  75
  76     return buffer;
  77 }
  78
  79 void ff_slice_buffer_release(slice_buffer *buf, int line)
  80 {
  81     IDWTELEM *buffer;
  82
  83     av_assert1(line >= 0 && line < buf->line_count);
  84     av_assert1(buf->line[line]);
  85
  86     buffer = buf->line[line];
  87     buf->data_stack_top++;
  88     buf->data_stack[buf->data_stack_top] = buffer;
  89     buf->line[line]                      = NULL;
  90 }
  91
  92 void ff_slice_buffer_flush(slice_buffer *buf)
  93 {
  94     int i;
  95     for (i = 0; i < buf->line_count; i++)
  96         if (buf->line[i])
  97             ff_slice_buffer_release(buf, i);
  98 }
  99
 100 void ff_slice_buffer_destroy(slice_buffer *buf)
 101 {
 102     int i;
 103     ff_slice_buffer_flush(buf);
 104
 105     for (i = buf->data_count - 1; i >= 0; i--)
 106         av_freep(&buf->data_stack[i]);
 107     av_freep(&buf->data_stack);
 108     av_freep(&buf->line);
 109 }
 110
 111 static inline int mirror(int v, int m)
 112 {
 113     while ((unsigned)v > (unsigned)m) {
 114         v = -v;
 115         if (v < 0)
 116             v += 2 * m;
 117     }
 118     return v;
 119 }
 120
 121 static av_always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
 122                                   int dst_step, int src_step, int ref_step,
 123                                   int width, int mul, int add, int shift,
 124                                   int highpass, int inverse)
 125 {
 126     const int mirror_left  = !highpass;
 127     const int mirror_right = (width & 1) ^ highpass;
 128     const int w            = (width >> 1) - 1 + (highpass & width);
 129     int i;
 130
 131 #define LIFT(src, ref, inv) ((src) + ((inv) ? -(ref) : +(ref)))
 132     if (mirror_left) {
 133         dst[0] = LIFT(src[0], ((mul * 2 * ref[0] + add) >> shift), inverse);
 134         dst   += dst_step;
 135         src   += src_step;
 136     }
 137
 138     for (i = 0; i < w; i++)
 139         dst[i * dst_step] = LIFT(src[i * src_step],
 140                                  ((mul * (ref[i * ref_step] +
 141                                           ref[(i + 1) * ref_step]) +
 142                                    add) >> shift),
 143                                  inverse);
 144
 145     if (mirror_right)
 146         dst[w * dst_step] = LIFT(src[w * src_step],
 147                                  ((mul * 2 * ref[w * ref_step] + add) >> shift),
 148                                  inverse);
 149 }
 150
 151 static av_always_inline void liftS(DWTELEM *dst, DWTELEM *src, DWTELEM *ref,
 152                                    int dst_step, int src_step, int ref_step,
 153                                    int width, int mul, int add, int shift,
 154                                    int highpass, int inverse)
 155 {
 156     const int mirror_left  = !highpass;
 157     const int mirror_right = (width & 1) ^ highpass;
 158     const int w            = (width >> 1) - 1 + (highpass & width);
 159     int i;
 160
 161     av_assert1(shift == 4);
 162 #define LIFTS(src, ref, inv)                                            \
 163     ((inv) ? (src) + (((ref) + 4 * (src)) >> shift)                     \
 164            : -((-16 * (src) + (ref) + add /                             \
 165                 4 + 1 + (5 << 25)) / (5 * 4) - (1 << 23)))
 166     if (mirror_left) {
 167         dst[0] = LIFTS(src[0], mul * 2 * ref[0] + add, inverse);
 168         dst   += dst_step;
 169         src   += src_step;
 170     }
 171
 172     for (i = 0; i < w; i++)
 173         dst[i * dst_step] = LIFTS(src[i * src_step],
 174                                   mul * (ref[i * ref_step] +
 175                                          ref[(i + 1) * ref_step]) + add,
 176                                   inverse);
 177
 178     if (mirror_right)
 179         dst[w * dst_step] = LIFTS(src[w * src_step],
 180                                   mul * 2 * ref[w * ref_step] + add,
 181                                   inverse);
 182 }
 183
 184 static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width)
 185 {
 186     const int width2 = width >> 1;
 187     int x;
 188     const int w2 = (width + 1) >> 1;
 189
 190     for (x = 0; x < width2; x++) {
 191         temp[x]      = b[2 * x];
 192         temp[x + w2] = b[2 * x + 1];
 193     }
 194     if (width & 1)
 195         temp[x] = b[2 * x];
 196     lift(b + w2, temp + w2, temp,   1, 1, 1, width, -1, 0, 1, 1, 0);
 197     lift(b,      temp,      b + w2, 1, 1, 1, width,  1, 2, 2, 0, 0);
 198 }
 199
 200 static void vertical_decompose53iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
 201                                     int width)
 202 {
 203     int i;
 204
 205     for (i = 0; i < width; i++)
 206         b1[i] -= (b0[i] + b2[i]) >> 1;
 207 }
 208
 209 static void vertical_decompose53iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
 210                                     int width)
 211 {
 212     int i;
 213
 214     for (i = 0; i < width; i++)
 215         b1[i] += (b0[i] + b2[i] + 2) >> 2;
 216 }
 217
 218 static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp,
 219                                  int width, int height, int stride)
 220 {
 221     int y;
 222     DWTELEM *b0 = buffer + mirror(-2 - 1, height - 1) * stride;
 223     DWTELEM *b1 = buffer + mirror(-2,     height - 1) * stride;
 224
 225     for (y = -2; y < height; y += 2) {
 226         DWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
 227         DWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
 228
 229         if (y + 1 < (unsigned)height)
 230             horizontal_decompose53i(b2, temp, width);
 231         if (y + 2 < (unsigned)height)
 232             horizontal_decompose53i(b3, temp, width);
 233
 234         if (y + 1 < (unsigned)height)
 235             vertical_decompose53iH0(b1, b2, b3, width);
 236         if (y + 0 < (unsigned)height)
 237             vertical_decompose53iL0(b0, b1, b2, width);
 238
 239         b0 = b2;
 240         b1 = b3;
 241     }
 242 }
 243
 244 static void horizontal_decompose97i(DWTELEM *b, DWTELEM *temp, int width)
 245 {
 246     const int w2 = (width + 1) >> 1;
 247
 248     lift(temp + w2, b + 1, b,         1, 2, 2, width, W_AM, W_AO, W_AS, 1, 1);
 249     liftS(temp,     b,     temp + w2, 1, 2, 1, width, W_BM, W_BO, W_BS, 0, 0);
 250     lift(b + w2, temp + w2, temp,     1, 1, 1, width, W_CM, W_CO, W_CS, 1, 0);
 251     lift(b,      temp,      b + w2,   1, 1, 1, width, W_DM, W_DO, W_DS, 0, 0);
 252 }
 253
 254 static void vertical_decompose97iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
 255                                     int width)
 256 {
 257     int i;
 258
 259     for (i = 0; i < width; i++)
 260         b1[i] -= (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
 261 }
 262
 263 static void vertical_decompose97iH1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
 264                                     int width)
 265 {
 266     int i;
 267
 268     for (i = 0; i < width; i++)
 269         b1[i] += (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
 270 }
 271
 272 static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
 273                                     int width)
 274 {
 275     int i;
 276
 277     for (i = 0; i < width; i++)
 278         b1[i] = (16 * 4 * b1[i] - 4 * (b0[i] + b2[i]) + W_BO * 5 + (5 << 27)) /
 279                 (5 * 16) - (1 << 23);
 280 }
 281
 282 static void vertical_decompose97iL1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2,
 283                                     int width)
 284 {
 285     int i;
 286
 287     for (i = 0; i < width; i++)
 288         b1[i] += (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
 289 }
 290
 291 static void spatial_decompose97i(DWTELEM *buffer, DWTELEM *temp,
 292                                  int width, int height, int stride)
 293 {
 294     int y;
 295     DWTELEM *b0 = buffer + mirror(-4 - 1, height - 1) * stride;
 296     DWTELEM *b1 = buffer + mirror(-4,     height - 1) * stride;
 297     DWTELEM *b2 = buffer + mirror(-4 + 1, height - 1) * stride;
 298     DWTELEM *b3 = buffer + mirror(-4 + 2, height - 1) * stride;
 299
 300     for (y = -4; y < height; y += 2) {
 301         DWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
 302         DWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
 303
 304         if (y + 3 < (unsigned)height)
 305             horizontal_decompose97i(b4, temp, width);
 306         if (y + 4 < (unsigned)height)
 307             horizontal_decompose97i(b5, temp, width);
 308
 309         if (y + 3 < (unsigned)height)
 310             vertical_decompose97iH0(b3, b4, b5, width);
 311         if (y + 2 < (unsigned)height)
 312             vertical_decompose97iL0(b2, b3, b4, width);
 313         if (y + 1 < (unsigned)height)
 314             vertical_decompose97iH1(b1, b2, b3, width);
 315         if (y + 0 < (unsigned)height)
 316             vertical_decompose97iL1(b0, b1, b2, width);
 317
 318         b0 = b2;
 319         b1 = b3;
 320         b2 = b4;
 321         b3 = b5;
 322     }
 323 }
 324
 325 void ff_spatial_dwt(DWTELEM *buffer, DWTELEM *temp, int width, int height,
 326                     int stride, int type, int decomposition_count)
 327 {
 328     int level;
 329
 330     for (level = 0; level < decomposition_count; level++) {
 331         switch (type) {
 332         case DWT_97:
 333             spatial_decompose97i(buffer, temp,
 334                                  width >> level, height >> level,
 335                                  stride << level);
 336             break;
 337         case DWT_53:
 338             spatial_decompose53i(buffer, temp,
 339                                  width >> level, height >> level,
 340                                  stride << level);
 341             break;
 342         }
 343     }
 344 }
 345
 346 static void horizontal_compose53i(IDWTELEM *b, IDWTELEM *temp, int width)
 347 {
 348     const int width2 = width >> 1;
 349     const int w2     = (width + 1) >> 1;
 350     int x;
 351
 352     for (x = 0; x < width2; x++) {
 353         temp[2 * x]     = b[x];
 354         temp[2 * x + 1] = b[x + w2];
 355     }
 356     if (width & 1)
 357         temp[2 * x] = b[x];
 358
 359     b[0] = temp[0] - ((temp[1] + 1) >> 1);
 360     for (x = 2; x < width - 1; x += 2) {
 361         b[x]     = temp[x]     - ((temp[x - 1] + temp[x + 1] + 2) >> 2);
 362         b[x - 1] = temp[x - 1] + ((b[x - 2]    + b[x]        + 1) >> 1);
 363     }
 364     if (width & 1) {
 365         b[x]     = temp[x]     - ((temp[x - 1]     + 1) >> 1);
 366         b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1);
 367     } else
 368         b[x - 1] = temp[x - 1] + b[x - 2];
 369 }
 370
 371 static void vertical_compose53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 372                                   int width)
 373 {
 374     int i;
 375
 376     for (i = 0; i < width; i++)
 377         b1[i] += (b0[i] + b2[i]) >> 1;
 378 }
 379
 380 static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 381                                   int width)
 382 {
 383     int i;
 384
 385     for (i = 0; i < width; i++)
 386         b1[i] -= (b0[i] + b2[i] + 2) >> 2;
 387 }
 388
 389 static void spatial_compose53i_buffered_init(DWTCompose *cs, slice_buffer *sb,
 390                                              int height, int stride_line)
 391 {
 392     cs->b0 = slice_buffer_get_line(sb,
 393                                    mirror(-1 - 1, height - 1) * stride_line);
 394     cs->b1 = slice_buffer_get_line(sb, mirror(-1, height - 1) * stride_line);
 395     cs->y  = -1;
 396 }
 397
 398 static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer,
 399                                     int height, int stride)
 400 {
 401     cs->b0 = buffer + mirror(-1 - 1, height - 1) * stride;
 402     cs->b1 = buffer + mirror(-1,     height - 1) * stride;
 403     cs->y  = -1;
 404 }
 405
 406 static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb,
 407                                            IDWTELEM *temp,
 408                                            int width, int height,
 409                                            int stride_line)
 410 {
 411     int y = cs->y;
 412
 413     IDWTELEM *b0 = cs->b0;
 414     IDWTELEM *b1 = cs->b1;
 415     IDWTELEM *b2 = slice_buffer_get_line(sb,
 416                                          mirror(y + 1, height - 1) *
 417                                          stride_line);
 418     IDWTELEM *b3 = slice_buffer_get_line(sb,
 419                                          mirror(y + 2, height - 1) *
 420                                          stride_line);
 421
 422     if (y + 1 < (unsigned)height && y < (unsigned)height) {
 423         int x;
 424
 425         for (x = 0; x < width; x++) {
 426             b2[x] -= (b1[x] + b3[x] + 2) >> 2;
 427             b1[x] += (b0[x] + b2[x])     >> 1;
 428         }
 429     } else {
 430         if (y + 1 < (unsigned)height)
 431             vertical_compose53iL0(b1, b2, b3, width);
 432         if (y + 0 < (unsigned)height)
 433             vertical_compose53iH0(b0, b1, b2, width);
 434     }
 435
 436     if (y - 1 < (unsigned)height)
 437         horizontal_compose53i(b0, temp, width);
 438     if (y + 0 < (unsigned)height)
 439         horizontal_compose53i(b1, temp, width);
 440
 441     cs->b0  = b2;
 442     cs->b1  = b3;
 443     cs->y  += 2;
 444 }
 445
 446 static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer,
 447                                   IDWTELEM *temp, int width, int height,
 448                                   int stride)
 449 {
 450     int y        = cs->y;
 451     IDWTELEM *b0 = cs->b0;
 452     IDWTELEM *b1 = cs->b1;
 453     IDWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride;
 454     IDWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride;
 455
 456     if (y + 1 < (unsigned)height)
 457         vertical_compose53iL0(b1, b2, b3, width);
 458     if (y + 0 < (unsigned)height)
 459         vertical_compose53iH0(b0, b1, b2, width);
 460
 461     if (y - 1 < (unsigned)height)
 462         horizontal_compose53i(b0, temp, width);
 463     if (y + 0 < (unsigned)height)
 464         horizontal_compose53i(b1, temp, width);
 465
 466     cs->b0  = b2;
 467     cs->b1  = b3;
 468     cs->y  += 2;
 469 }
 470
 471 void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width)
 472 {
 473     const int w2 = (width + 1) >> 1;
 474     int x;
 475
 476     temp[0] = b[0] - ((3 * b[w2] + 2) >> 2);
 477     for (x = 1; x < (width >> 1); x++) {
 478         temp[2 * x]     = b[x] - ((3 * (b[x + w2 - 1] + b[x + w2]) + 4) >> 3);
 479         temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
 480     }
 481     if (width & 1) {
 482         temp[2 * x]     = b[x] - ((3 * b[x + w2 - 1] + 2) >> 2);
 483         temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x];
 484     } else
 485         temp[2 * x - 1] = b[x + w2 - 1] - 2 * temp[2 * x - 2];
 486
 487     b[0] = temp[0] + ((2 * temp[0] + temp[1] + 4) >> 3);
 488     for (x = 2; x < width - 1; x += 2) {
 489         b[x]     = temp[x] + ((4 * temp[x] + temp[x - 1] + temp[x + 1] + 8) >> 4);
 490         b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
 491     }
 492     if (width & 1) {
 493         b[x]     = temp[x] + ((2 * temp[x] + temp[x - 1] + 4) >> 3);
 494         b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1);
 495     } else
 496         b[x - 1] = temp[x - 1] + 3 * b[x - 2];
 497 }
 498
 499 static void vertical_compose97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 500                                   int width)
 501 {
 502     int i;
 503
 504     for (i = 0; i < width; i++)
 505         b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
 506 }
 507
 508 static void vertical_compose97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 509                                   int width)
 510 {
 511     int i;
 512
 513     for (i = 0; i < width; i++)
 514         b1[i] -= (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS;
 515 }
 516
 517 static void vertical_compose97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 518                                   int width)
 519 {
 520     int i;
 521
 522     for (i = 0; i < width; i++)
 523         b1[i] += (W_BM * (b0[i] + b2[i]) + 4 * b1[i] + W_BO) >> W_BS;
 524 }
 525
 526 static void vertical_compose97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 527                                   int width)
 528 {
 529     int i;
 530
 531     for (i = 0; i < width; i++)
 532         b1[i] -= (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS;
 533 }
 534
 535 void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
 536                                  IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5,
 537                                  int width)
 538 {
 539     int i;
 540
 541     for (i = 0; i < width; i++) {
 542         b4[i] -= (W_DM * (b3[i] + b5[i]) + W_DO) >> W_DS;
 543         b3[i] -= (W_CM * (b2[i] + b4[i]) + W_CO) >> W_CS;
 544         b2[i] += (W_BM * (b1[i] + b3[i]) + 4 * b2[i] + W_BO) >> W_BS;
 545         b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS;
 546     }
 547 }
 548
 549 static void spatial_compose97i_buffered_init(DWTCompose *cs, slice_buffer *sb,
 550                                              int height, int stride_line)
 551 {
 552     cs->b0 = slice_buffer_get_line(sb, mirror(-3 - 1, height - 1) * stride_line);
 553     cs->b1 = slice_buffer_get_line(sb, mirror(-3,     height - 1) * stride_line);
 554     cs->b2 = slice_buffer_get_line(sb, mirror(-3 + 1, height - 1) * stride_line);
 555     cs->b3 = slice_buffer_get_line(sb, mirror(-3 + 2, height - 1) * stride_line);
 556     cs->y  = -3;
 557 }
 558
 559 static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height,
 560                                     int stride)
 561 {
 562     cs->b0 = buffer + mirror(-3 - 1, height - 1) * stride;
 563     cs->b1 = buffer + mirror(-3,     height - 1) * stride;
 564     cs->b2 = buffer + mirror(-3 + 1, height - 1) * stride;
 565     cs->b3 = buffer + mirror(-3 + 2, height - 1) * stride;
 566     cs->y  = -3;
 567 }
 568
 569 static void spatial_compose97i_dy_buffered(DWTContext *dsp, DWTCompose *cs,
 570                                            slice_buffer * sb, IDWTELEM *temp,
 571                                            int width, int height,
 572                                            int stride_line)
 573 {
 574     int y = cs->y;
 575
 576     IDWTELEM *b0 = cs->b0;
 577     IDWTELEM *b1 = cs->b1;
 578     IDWTELEM *b2 = cs->b2;
 579     IDWTELEM *b3 = cs->b3;
 580     IDWTELEM *b4 = slice_buffer_get_line(sb,
 581                                          mirror(y + 3, height - 1) *
 582                                          stride_line);
 583     IDWTELEM *b5 = slice_buffer_get_line(sb,
 584                                          mirror(y + 4, height - 1) *
 585                                          stride_line);
 586
 587     if (y > 0 && y + 4 < height) {
 588         dsp->vertical_compose97i(b0, b1, b2, b3, b4, b5, width);
 589     } else {
 590         if (y + 3 < (unsigned)height)
 591             vertical_compose97iL1(b3, b4, b5, width);
 592         if (y + 2 < (unsigned)height)
 593             vertical_compose97iH1(b2, b3, b4, width);
 594         if (y + 1 < (unsigned)height)
 595             vertical_compose97iL0(b1, b2, b3, width);
 596         if (y + 0 < (unsigned)height)
 597             vertical_compose97iH0(b0, b1, b2, width);
 598     }
 599
 600     if (y - 1 < (unsigned)height)
 601         dsp->horizontal_compose97i(b0, temp, width);
 602     if (y + 0 < (unsigned)height)
 603         dsp->horizontal_compose97i(b1, temp, width);
 604
 605     cs->b0  = b2;
 606     cs->b1  = b3;
 607     cs->b2  = b4;
 608     cs->b3  = b5;
 609     cs->y  += 2;
 610 }
 611
 612 static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer,
 613                                   IDWTELEM *temp, int width, int height,
 614                                   int stride)
 615 {
 616     int y        = cs->y;
 617     IDWTELEM *b0 = cs->b0;
 618     IDWTELEM *b1 = cs->b1;
 619     IDWTELEM *b2 = cs->b2;
 620     IDWTELEM *b3 = cs->b3;
 621     IDWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride;
 622     IDWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride;
 623
 624     if (y + 3 < (unsigned)height)
 625         vertical_compose97iL1(b3, b4, b5, width);
 626     if (y + 2 < (unsigned)height)
 627         vertical_compose97iH1(b2, b3, b4, width);
 628     if (y + 1 < (unsigned)height)
 629         vertical_compose97iL0(b1, b2, b3, width);
 630     if (y + 0 < (unsigned)height)
 631         vertical_compose97iH0(b0, b1, b2, width);
 632
 633     if (y - 1 < (unsigned)height)
 634         ff_snow_horizontal_compose97i(b0, temp, width);
 635     if (y + 0 < (unsigned)height)
 636         ff_snow_horizontal_compose97i(b1, temp, width);
 637
 638     cs->b0  = b2;
 639     cs->b1  = b3;
 640     cs->b2  = b4;
 641     cs->b3  = b5;
 642     cs->y  += 2;
 643 }
 644
 645 void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width,
 646                                    int height, int stride_line, int type,
 647                                    int decomposition_count)
 648 {
 649     int level;
 650     for (level = decomposition_count - 1; level >= 0; level--) {
 651         switch (type) {
 652         case DWT_97:
 653             spatial_compose97i_buffered_init(cs + level, sb, height >> level,
 654                                              stride_line << level);
 655             break;
 656         case DWT_53:
 657             spatial_compose53i_buffered_init(cs + level, sb, height >> level,
 658                                              stride_line << level);
 659             break;
 660         }
 661     }
 662 }
 663
 664 void ff_spatial_idwt_buffered_slice(DWTContext *dsp, DWTCompose *cs,
 665                                     slice_buffer *slice_buf, IDWTELEM *temp,
 666                                     int width, int height, int stride_line,
 667                                     int type, int decomposition_count, int y)
 668 {
 669     const int support = type == 1 ? 3 : 5;
 670     int level;
 671     if (type == 2)
 672         return;
 673
 674     for (level = decomposition_count - 1; level >= 0; level--)
 675         while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
 676             switch (type) {
 677             case DWT_97:
 678                 spatial_compose97i_dy_buffered(dsp, cs + level, slice_buf, temp,
 679                                                width >> level,
 680                                                height >> level,
 681                                                stride_line << level);
 682                 break;
 683             case DWT_53:
 684                 spatial_compose53i_dy_buffered(cs + level, slice_buf, temp,
 685                                                width >> level,
 686                                                height >> level,
 687                                                stride_line << level);
 688                 break;
 689             }
 690         }
 691 }
 692
 693 static void ff_spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width,
 694                                  int height, int stride, int type,
 695                                  int decomposition_count)
 696 {
 697     int level;
 698     for (level = decomposition_count - 1; level >= 0; level--) {
 699         switch (type) {
 700         case DWT_97:
 701             spatial_compose97i_init(cs + level, buffer, height >> level,
 702                                     stride << level);
 703             break;
 704         case DWT_53:
 705             spatial_compose53i_init(cs + level, buffer, height >> level,
 706                                     stride << level);
 707             break;
 708         }
 709     }
 710 }
 711
 712 static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer,
 713                                   IDWTELEM *temp, int width, int height,
 714                                   int stride, int type,
 715                                   int decomposition_count, int y)
 716 {
 717     const int support = type == 1 ? 3 : 5;
 718     int level;
 719     if (type == 2)
 720         return;
 721
 722     for (level = decomposition_count - 1; level >= 0; level--)
 723         while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) {
 724             switch (type) {
 725             case DWT_97:
 726                 spatial_compose97i_dy(cs + level, buffer, temp, width >> level,
 727                                       height >> level, stride << level);
 728                 break;
 729             case DWT_53:
 730                 spatial_compose53i_dy(cs + level, buffer, temp, width >> level,
 731                                       height >> level, stride << level);
 732                 break;
 733             }
 734         }
 735 }
 736
 737 void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height,
 738                      int stride, int type, int decomposition_count)
 739 {
 740     DWTCompose cs[MAX_DECOMPOSITIONS];
 741     int y;
 742     ff_spatial_idwt_init(cs, buffer, width, height, stride, type,
 743                          decomposition_count);
 744     for (y = 0; y < height; y += 4)
 745         ff_spatial_idwt_slice(cs, buffer, temp, width, height, stride, type,
 746                               decomposition_count, y);
 747 }
 748
 749 static inline int w_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size,
 750                       int w, int h, int type)
 751 {
 752     int s, i, j;
 753     const int dec_count = w == 8 ? 3 : 4;
 754     int tmp[32 * 32], tmp2[32];
 755     int level, ori;
 756     static const int scale[2][2][4][4] = {
 757         {
 758             { // 9/7 8x8 dec=3
 759                 { 268, 239, 239, 213 },
 760                 { 0,   224, 224, 152 },
 761                 { 0,   135, 135, 110 },
 762             },
 763             { // 9/7 16x16 or 32x32 dec=4
 764                 { 344, 310, 310, 280 },
 765                 { 0,   320, 320, 228 },
 766                 { 0,   175, 175, 136 },
 767                 { 0,   129, 129, 102 },
 768             }
 769         },
 770         {
 771             { // 5/3 8x8 dec=3
 772                 { 275, 245, 245, 218 },
 773                 { 0,   230, 230, 156 },
 774                 { 0,   138, 138, 113 },
 775             },
 776             { // 5/3 16x16 or 32x32 dec=4
 777                 { 352, 317, 317, 286 },
 778                 { 0,   328, 328, 233 },
 779                 { 0,   180, 180, 140 },
 780                 { 0,   132, 132, 105 },
 781             }
 782         }
 783     };
 784
 785     for (i = 0; i < h; i++) {
 786         for (j = 0; j < w; j += 4) {
 787             tmp[32 * i + j + 0] = (pix1[j + 0] - pix2[j + 0]) << 4;
 788             tmp[32 * i + j + 1] = (pix1[j + 1] - pix2[j + 1]) << 4;
 789             tmp[32 * i + j + 2] = (pix1[j + 2] - pix2[j + 2]) << 4;
 790             tmp[32 * i + j + 3] = (pix1[j + 3] - pix2[j + 3]) << 4;
 791         }
 792         pix1 += line_size;
 793         pix2 += line_size;
 794     }
 795
 796     ff_spatial_dwt(tmp, tmp2, w, h, 32, type, dec_count);
 797
 798     s = 0;
 799     av_assert1(w == h);
 800     for (level = 0; level < dec_count; level++)
 801         for (ori = level ? 1 : 0; ori < 4; ori++) {
 802             int size   = w >> (dec_count - level);
 803             int sx     = (ori & 1) ? size : 0;
 804             int stride = 32 << (dec_count - level);
 805             int sy     = (ori & 2) ? stride >> 1 : 0;
 806
 807             for (i = 0; i < size; i++)
 808                 for (j = 0; j < size; j++) {
 809                     int v = tmp[sx + sy + i * stride + j] *
 810                             scale[type][dec_count - 3][level][ori];
 811                     s += FFABS(v);
 812                 }
 813         }
 814     av_assert1(s >= 0);
 815     return s >> 9;
 816 }
 817
 818 static int w53_8_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
 819 {
 820     return w_c(v, pix1, pix2, line_size, 8, h, 1);
 821 }
 822
 823 static int w97_8_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
 824 {
 825     return w_c(v, pix1, pix2, line_size, 8, h, 0);
 826 }
 827
 828 static int w53_16_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
 829 {
 830     return w_c(v, pix1, pix2, line_size, 16, h, 1);
 831 }
 832
 833 static int w97_16_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
 834 {
 835     return w_c(v, pix1, pix2, line_size, 16, h, 0);
 836 }
 837
 838 int ff_w53_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
 839 {
 840     return w_c(v, pix1, pix2, line_size, 32, h, 1);
 841 }
 842
 843 int ff_w97_32_c(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
 844 {
 845     return w_c(v, pix1, pix2, line_size, 32, h, 0);
 846 }
 847
 848 void ff_dsputil_init_dwt(DSPContext *c)
 849 {
 850     c->w53[0] = w53_16_c;
 851     c->w53[1] = w53_8_c;
 852     c->w97[0] = w97_16_c;
 853     c->w97[1] = w97_8_c;
 854 }
 855
 856 void ff_dwt_init(DWTContext *c)
 857 {
 858     c->vertical_compose97i   = ff_snow_vertical_compose97i;
 859     c->horizontal_compose97i = ff_snow_horizontal_compose97i;
 860     c->inner_add_yblock      = ff_snow_inner_add_yblock;
 861
 862     if (HAVE_MMX)
 863         ff_dwt_init_x86(c);
 864 }
 865
 866
 867 static av_always_inline
 868 void interleave(IDWTELEM *dst, IDWTELEM *src0, IDWTELEM *src1, int w2, int add, int shift)
 869 {
 870     int i;
 871     for (i = 0; i < w2; i++) {
 872         dst[2*i  ] = (src0[i] + add) >> shift;
 873         dst[2*i+1] = (src1[i] + add) >> shift;
 874     }
 875 }
 876
 877 static void horizontal_compose_dirac53i(IDWTELEM *b, IDWTELEM *temp, int w)
 878 {
 879     const int w2 = w >> 1;
 880     int x;
 881
 882     temp[0] = COMPOSE_53iL0(b[w2], b[0], b[w2]);
 883     for (x = 1; x < w2; x++) {
 884         temp[x     ] = COMPOSE_53iL0     (b[x+w2-1], b[x     ], b[x+w2]);
 885         temp[x+w2-1] = COMPOSE_DIRAC53iH0(temp[x-1], b[x+w2-1], temp[x]);
 886     }
 887     temp[w-1] = COMPOSE_DIRAC53iH0(temp[w2-1], b[w-1], temp[w2-1]);
 888
 889     interleave(b, temp, temp+w2, w2, 1, 1);
 890 }
 891
 892 static void horizontal_compose_dd97i(IDWTELEM *b, IDWTELEM *tmp, int w)
 893 {
 894     const int w2 = w >> 1;
 895     int x;
 896
 897     tmp[0] = COMPOSE_53iL0(b[w2], b[0], b[w2]);
 898     for (x = 1; x < w2; x++)
 899         tmp[x] = COMPOSE_53iL0(b[x+w2-1], b[x], b[x+w2]);
 900
 901     // extend the edges
 902     tmp[-1]   = tmp[0];
 903     tmp[w2+1] = tmp[w2] = tmp[w2-1];
 904
 905     for (x = 0; x < w2; x++) {
 906         b[2*x  ] = (tmp[x] + 1)>>1;
 907         b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1;
 908     }
 909 }
 910
 911 static void horizontal_compose_dd137i(IDWTELEM *b, IDWTELEM *tmp, int w)
 912 {
 913     const int w2 = w >> 1;
 914     int x;
 915
 916     tmp[0] = COMPOSE_DD137iL0(b[w2], b[w2], b[0], b[w2  ], b[w2+1]);
 917     tmp[1] = COMPOSE_DD137iL0(b[w2], b[w2], b[1], b[w2+1], b[w2+2]);
 918     for (x = 2; x < w2-1; x++)
 919         tmp[x] = COMPOSE_DD137iL0(b[x+w2-2], b[x+w2-1], b[x], b[x+w2], b[x+w2+1]);
 920     tmp[w2-1] = COMPOSE_DD137iL0(b[w-3], b[w-2], b[w2-1], b[w-1], b[w-1]);
 921
 922     // extend the edges
 923     tmp[-1]   = tmp[0];
 924     tmp[w2+1] = tmp[w2] = tmp[w2-1];
 925
 926     for (x = 0; x < w2; x++) {
 927         b[2*x  ] = (tmp[x] + 1)>>1;
 928         b[2*x+1] = (COMPOSE_DD97iH0(tmp[x-1], tmp[x], b[x+w2], tmp[x+1], tmp[x+2]) + 1)>>1;
 929     }
 930 }
 931
 932 static av_always_inline
 933 void horizontal_compose_haari(IDWTELEM *b, IDWTELEM *temp, int w, int shift)
 934 {
 935     const int w2 = w >> 1;
 936     int x;
 937
 938     for (x = 0; x < w2; x++) {
 939         temp[x   ] = COMPOSE_HAARiL0(b[x   ], b[x+w2]);
 940         temp[x+w2] = COMPOSE_HAARiH0(b[x+w2], temp[x]);
 941     }
 942
 943     interleave(b, temp, temp+w2, w2, shift, shift);
 944 }
 945
 946 static void horizontal_compose_haar0i(IDWTELEM *b, IDWTELEM *temp, int w)
 947 {
 948     horizontal_compose_haari(b, temp, w, 0);
 949 }
 950
 951 static void horizontal_compose_haar1i(IDWTELEM *b, IDWTELEM *temp, int w)
 952 {
 953     horizontal_compose_haari(b, temp, w, 1);
 954 }
 955
 956 static void horizontal_compose_fidelityi(IDWTELEM *b, IDWTELEM *tmp, int w)
 957 {
 958     const int w2 = w >> 1;
 959     int i, x;
 960     IDWTELEM v[8];
 961
 962     for (x = 0; x < w2; x++) {
 963         for (i = 0; i < 8; i++)
 964             v[i] = b[av_clip(x-3+i, 0, w2-1)];
 965         tmp[x] = COMPOSE_FIDELITYiH0(v[0], v[1], v[2], v[3], b[x+w2], v[4], v[5], v[6], v[7]);
 966     }
 967
 968     for (x = 0; x < w2; x++) {
 969         for (i = 0; i < 8; i++)
 970             v[i] = tmp[av_clip(x-4+i, 0, w2-1)];
 971         tmp[x+w2] = COMPOSE_FIDELITYiL0(v[0], v[1], v[2], v[3], b[x], v[4], v[5], v[6], v[7]);
 972     }
 973
 974     interleave(b, tmp+w2, tmp, w2, 0, 0);
 975 }
 976
 977 static void horizontal_compose_daub97i(IDWTELEM *b, IDWTELEM *temp, int w)
 978 {
 979     const int w2 = w >> 1;
 980     int x, b0, b1, b2;
 981
 982     temp[0] = COMPOSE_DAUB97iL1(b[w2], b[0], b[w2]);
 983     for (x = 1; x < w2; x++) {
 984         temp[x     ] = COMPOSE_DAUB97iL1(b[x+w2-1], b[x     ], b[x+w2]);
 985         temp[x+w2-1] = COMPOSE_DAUB97iH1(temp[x-1], b[x+w2-1], temp[x]);
 986     }
 987     temp[w-1] = COMPOSE_DAUB97iH1(temp[w2-1], b[w-1], temp[w2-1]);
 988
 989     // second stage combined with interleave and shift
 990     b0 = b2 = COMPOSE_DAUB97iL0(temp[w2], temp[0], temp[w2]);
 991     b[0] = (b0 + 1) >> 1;
 992     for (x = 1; x < w2; x++) {
 993         b2 = COMPOSE_DAUB97iL0(temp[x+w2-1], temp[x     ], temp[x+w2]);
 994         b1 = COMPOSE_DAUB97iH0(          b0, temp[x+w2-1], b2        );
 995         b[2*x-1] = (b1 + 1) >> 1;
 996         b[2*x  ] = (b2 + 1) >> 1;
 997         b0 = b2;
 998     }
 999     b[w-1] = (COMPOSE_DAUB97iH0(b2, temp[w-1], b2) + 1) >> 1;
1000 }
1001
1002 static void vertical_compose_dirac53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
1003 {
1004     int i;
1005
1006     for(i=0; i<width; i++){
1007         b1[i] = COMPOSE_DIRAC53iH0(b0[i], b1[i], b2[i]);
1008     }
1009 }
1010
1011 static void vertical_compose_dd97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
1012                                   IDWTELEM *b3, IDWTELEM *b4, int width)
1013 {
1014     int i;
1015
1016     for(i=0; i<width; i++){
1017         b2[i] = COMPOSE_DD97iH0(b0[i], b1[i], b2[i], b3[i], b4[i]);
1018     }
1019 }
1020
1021 static void vertical_compose_dd137iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2,
1022                                       IDWTELEM *b3, IDWTELEM *b4, int width)
1023 {
1024     int i;
1025
1026     for(i=0; i<width; i++){
1027         b2[i] = COMPOSE_DD137iL0(b0[i], b1[i], b2[i], b3[i], b4[i]);
1028     }
1029 }
1030
1031 static void vertical_compose_haar(IDWTELEM *b0, IDWTELEM *b1, int width)
1032 {
1033     int i;
1034
1035     for (i = 0; i < width; i++) {
1036         b0[i] = COMPOSE_HAARiL0(b0[i], b1[i]);
1037         b1[i] = COMPOSE_HAARiH0(b1[i], b0[i]);
1038     }
1039 }
1040
1041 static void vertical_compose_fidelityiH0(IDWTELEM *dst, IDWTELEM *b[8], int width)
1042 {
1043     int i;
1044
1045     for(i=0; i<width; i++){
1046         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]);
1047     }
1048 }
1049
1050 static void vertical_compose_fidelityiL0(IDWTELEM *dst, IDWTELEM *b[8], int width)
1051 {
1052     int i;
1053
1054     for(i=0; i<width; i++){
1055         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]);
1056     }
1057 }
1058
1059 static void vertical_compose_daub97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
1060 {
1061     int i;
1062
1063     for(i=0; i<width; i++){
1064         b1[i] = COMPOSE_DAUB97iH0(b0[i], b1[i], b2[i]);
1065     }
1066 }
1067
1068 static void vertical_compose_daub97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
1069 {
1070     int i;
1071
1072     for(i=0; i<width; i++){
1073         b1[i] = COMPOSE_DAUB97iH1(b0[i], b1[i], b2[i]);
1074     }
1075 }
1076
1077 static void vertical_compose_daub97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
1078 {
1079     int i;
1080
1081     for(i=0; i<width; i++){
1082         b1[i] = COMPOSE_DAUB97iL0(b0[i], b1[i], b2[i]);
1083     }
1084 }
1085
1086 static void vertical_compose_daub97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, int width)
1087 {
1088     int i;
1089
1090     for(i=0; i<width; i++){
1091         b1[i] = COMPOSE_DAUB97iL1(b0[i], b1[i], b2[i]);
1092     }
1093 }
1094
1095
1096 static void spatial_compose_dd97i_dy(DWTContext *d, int level, int width, int height, int stride)
1097 {
1098     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
1099     vertical_compose_5tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
1100     DWTCompose *cs = d->cs + level;
1101
1102     int i, y = cs->y;
1103     IDWTELEM *b[8];
1104     for (i = 0; i < 6; i++)
1105         b[i] = cs->b[i];
1106     b[6] = d->buffer + av_clip(y+5, 0, height-2)*stride;
1107     b[7] = d->buffer + av_clip(y+6, 1, height-1)*stride;
1108
1109         if(y+5<(unsigned)height) vertical_compose_l0(      b[5], b[6], b[7],       width);
1110         if(y+1<(unsigned)height) vertical_compose_h0(b[0], b[2], b[3], b[4], b[6], width);
1111
1112         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
1113         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
1114
1115     for (i = 0; i < 6; i++)
1116         cs->b[i] = b[i+2];
1117     cs->y += 2;
1118 }
1119
1120 static void spatial_compose_dirac53i_dy(DWTContext *d, int level, int width, int height, int stride)
1121 {
1122     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
1123     vertical_compose_3tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
1124     DWTCompose *cs = d->cs + level;
1125
1126     int y= cs->y;
1127     IDWTELEM *b[4] = { cs->b[0], cs->b[1] };
1128     b[2] = d->buffer + mirror(y+1, height-1)*stride;
1129     b[3] = d->buffer + mirror(y+2, height-1)*stride;
1130
1131         if(y+1<(unsigned)height) vertical_compose_l0(b[1], b[2], b[3], width);
1132         if(y+0<(unsigned)height) vertical_compose_h0(b[0], b[1], b[2], width);
1133
1134         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
1135         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
1136
1137     cs->b[0] = b[2];
1138     cs->b[1] = b[3];
1139     cs->y += 2;
1140 }
1141
1142
1143 static void spatial_compose_dd137i_dy(DWTContext *d, int level, int width, int height, int stride)
1144 {
1145     vertical_compose_5tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
1146     vertical_compose_5tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
1147     DWTCompose *cs = d->cs + level;
1148
1149     int i, y = cs->y;
1150     IDWTELEM *b[10];
1151     for (i = 0; i < 8; i++)
1152         b[i] = cs->b[i];
1153     b[8] = d->buffer + av_clip(y+7, 0, height-2)*stride;
1154     b[9] = d->buffer + av_clip(y+8, 1, height-1)*stride;
1155
1156         if(y+5<(unsigned)height) vertical_compose_l0(b[3], b[5], b[6], b[7], b[9], width);
1157         if(y+1<(unsigned)height) vertical_compose_h0(b[0], b[2], b[3], b[4], b[6], width);
1158
1159         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
1160         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
1161
1162     for (i = 0; i < 8; i++)
1163         cs->b[i] = b[i+2];
1164     cs->y += 2;
1165 }
1166
1167 // haar makes the assumption that height is even (always true for dirac)
1168 static void spatial_compose_haari_dy(DWTContext *d, int level, int width, int height, int stride)
1169 {
1170     vertical_compose_2tap vertical_compose = (void*)d->vertical_compose;
1171     int y = d->cs[level].y;
1172     IDWTELEM *b0 = d->buffer + (y-1)*stride;
1173     IDWTELEM *b1 = d->buffer + (y  )*stride;
1174
1175     vertical_compose(b0, b1, width);
1176     d->horizontal_compose(b0, d->temp, width);
1177     d->horizontal_compose(b1, d->temp, width);
1178
1179     d->cs[level].y += 2;
1180 }
1181
1182 // Don't do sliced idwt for fidelity; the 9 tap filter makes it a bit annoying
1183 // Fortunately, this filter isn't used in practice.
1184 static void spatial_compose_fidelity(DWTContext *d, int level, int width, int height, int stride)
1185 {
1186     vertical_compose_9tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
1187     vertical_compose_9tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
1188     int i, y;
1189     IDWTELEM *b[8];
1190
1191     for (y = 1; y < height; y += 2) {
1192         for (i = 0; i < 8; i++)
1193             b[i] = d->buffer + av_clip((y-7 + 2*i), 0, height-2)*stride;
1194         vertical_compose_h0(d->buffer + y*stride, b, width);
1195     }
1196
1197     for (y = 0; y < height; y += 2) {
1198         for (i = 0; i < 8; i++)
1199             b[i] = d->buffer + av_clip((y-7 + 2*i), 1, height-1)*stride;
1200         vertical_compose_l0(d->buffer + y*stride, b, width);
1201     }
1202
1203     for (y = 0; y < height; y++)
1204         d->horizontal_compose(d->buffer + y*stride, d->temp, width);
1205
1206     d->cs[level].y = height+1;
1207 }
1208
1209 static void spatial_compose_daub97i_dy(DWTContext *d, int level, int width, int height, int stride)
1210 {
1211     vertical_compose_3tap vertical_compose_l0 = (void*)d->vertical_compose_l0;
1212     vertical_compose_3tap vertical_compose_h0 = (void*)d->vertical_compose_h0;
1213     vertical_compose_3tap vertical_compose_l1 = (void*)d->vertical_compose_l1;
1214     vertical_compose_3tap vertical_compose_h1 = (void*)d->vertical_compose_h1;
1215     DWTCompose *cs = d->cs + level;
1216
1217     int i, y = cs->y;
1218     IDWTELEM *b[6];
1219     for (i = 0; i < 4; i++)
1220         b[i] = cs->b[i];
1221     b[4] = d->buffer + mirror(y+3, height-1)*stride;
1222     b[5] = d->buffer + mirror(y+4, height-1)*stride;
1223
1224         if(y+3<(unsigned)height) vertical_compose_l1(b[3], b[4], b[5], width);
1225         if(y+2<(unsigned)height) vertical_compose_h1(b[2], b[3], b[4], width);
1226         if(y+1<(unsigned)height) vertical_compose_l0(b[1], b[2], b[3], width);
1227         if(y+0<(unsigned)height) vertical_compose_h0(b[0], b[1], b[2], width);
1228
1229         if(y-1<(unsigned)height) d->horizontal_compose(b[0], d->temp, width);
1230         if(y+0<(unsigned)height) d->horizontal_compose(b[1], d->temp, width);
1231
1232     for (i = 0; i < 4; i++)
1233         cs->b[i] = b[i+2];
1234     cs->y += 2;
1235 }
1236
1237
1238 static void spatial_compose97i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
1239 {
1240     cs->b[0] = buffer + mirror(-3-1, height-1)*stride;
1241     cs->b[1] = buffer + mirror(-3  , height-1)*stride;
1242     cs->b[2] = buffer + mirror(-3+1, height-1)*stride;
1243     cs->b[3] = buffer + mirror(-3+2, height-1)*stride;
1244     cs->y = -3;
1245 }
1246
1247 static void spatial_compose53i_init2(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
1248 {
1249     cs->b[0] = buffer + mirror(-1-1, height-1)*stride;
1250     cs->b[1] = buffer + mirror(-1  , height-1)*stride;
1251     cs->y = -1;
1252 }
1253
1254 static void spatial_compose_dd97i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
1255 {
1256     cs->b[0] = buffer + av_clip(-5-1, 0, height-2)*stride;
1257     cs->b[1] = buffer + av_clip(-5  , 1, height-1)*stride;
1258     cs->b[2] = buffer + av_clip(-5+1, 0, height-2)*stride;
1259     cs->b[3] = buffer + av_clip(-5+2, 1, height-1)*stride;
1260     cs->b[4] = buffer + av_clip(-5+3, 0, height-2)*stride;
1261     cs->b[5] = buffer + av_clip(-5+4, 1, height-1)*stride;
1262     cs->y = -5;
1263 }
1264
1265 static void spatial_compose_dd137i_init(DWTCompose *cs, IDWTELEM *buffer, int height, int stride)
1266 {
1267     cs->b[0] = buffer + av_clip(-5-1, 0, height-2)*stride;
1268     cs->b[1] = buffer + av_clip(-5  , 1, height-1)*stride;
1269     cs->b[2] = buffer + av_clip(-5+1, 0, height-2)*stride;
1270     cs->b[3] = buffer + av_clip(-5+2, 1, height-1)*stride;
1271     cs->b[4] = buffer + av_clip(-5+3, 0, height-2)*stride;
1272     cs->b[5] = buffer + av_clip(-5+4, 1, height-1)*stride;
1273     cs->b[6] = buffer + av_clip(-5+5, 0, height-2)*stride;
1274     cs->b[7] = buffer + av_clip(-5+6, 1, height-1)*stride;
1275     cs->y = -5;
1276 }
1277
1278 int ff_spatial_idwt_init2(DWTContext *d, IDWTELEM *buffer, int width, int height,
1279                           int stride, enum dwt_type type, int decomposition_count,
1280                           IDWTELEM *temp)
1281 {
1282     int level;
1283
1284     d->buffer = buffer;
1285     d->width = width;
1286     d->height = height;
1287     d->stride = stride;
1288     d->decomposition_count = decomposition_count;
1289     d->temp = temp + 8;
1290
1291     for(level=decomposition_count-1; level>=0; level--){
1292         int hl = height >> level;
1293         int stride_l = stride << level;
1294
1295         switch(type){
1296         case DWT_DIRAC_DD9_7:
1297             spatial_compose_dd97i_init(d->cs+level, buffer, hl, stride_l);
1298             break;
1299         case DWT_DIRAC_LEGALL5_3:
1300             spatial_compose53i_init2(d->cs+level, buffer, hl, stride_l);
1301             break;
1302         case DWT_DIRAC_DD13_7:
1303             spatial_compose_dd137i_init(d->cs+level, buffer, hl, stride_l);
1304             break;
1305         case DWT_DIRAC_HAAR0:
1306         case DWT_DIRAC_HAAR1:
1307             d->cs[level].y = 1;
1308             break;
1309         case DWT_DIRAC_DAUB9_7:
1310             spatial_compose97i_init2(d->cs+level, buffer, hl, stride_l);
1311             break;
1312         default:
1313             d->cs[level].y = 0;
1314             break;
1315         }
1316     }
1317
1318     switch (type) {
1319     case DWT_DIRAC_DD9_7:
1320         d->spatial_compose = spatial_compose_dd97i_dy;
1321         d->vertical_compose_l0 = (void*)vertical_compose53iL0;
1322         d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
1323         d->horizontal_compose = horizontal_compose_dd97i;
1324         d->support = 7;
1325         break;
1326     case DWT_DIRAC_LEGALL5_3:
1327         d->spatial_compose = spatial_compose_dirac53i_dy;
1328         d->vertical_compose_l0 = (void*)vertical_compose53iL0;
1329         d->vertical_compose_h0 = (void*)vertical_compose_dirac53iH0;
1330         d->horizontal_compose = horizontal_compose_dirac53i;
1331         d->support = 3;
1332         break;
1333     case DWT_DIRAC_DD13_7:
1334         d->spatial_compose = spatial_compose_dd137i_dy;
1335         d->vertical_compose_l0 = (void*)vertical_compose_dd137iL0;
1336         d->vertical_compose_h0 = (void*)vertical_compose_dd97iH0;
1337         d->horizontal_compose = horizontal_compose_dd137i;
1338         d->support = 7;
1339         break;
1340     case DWT_DIRAC_HAAR0:
1341     case DWT_DIRAC_HAAR1:
1342         d->spatial_compose = spatial_compose_haari_dy;
1343         d->vertical_compose = (void*)vertical_compose_haar;
1344         if (type == DWT_DIRAC_HAAR0)
1345             d->horizontal_compose = horizontal_compose_haar0i;
1346         else
1347             d->horizontal_compose = horizontal_compose_haar1i;
1348         d->support = 1;
1349         break;
1350     case DWT_DIRAC_FIDELITY:
1351         d->spatial_compose = spatial_compose_fidelity;
1352         d->vertical_compose_l0 = (void*)vertical_compose_fidelityiL0;
1353         d->vertical_compose_h0 = (void*)vertical_compose_fidelityiH0;
1354         d->horizontal_compose = horizontal_compose_fidelityi;
1355         break;
1356     case DWT_DIRAC_DAUB9_7:
1357         d->spatial_compose = spatial_compose_daub97i_dy;
1358         d->vertical_compose_l0 = (void*)vertical_compose_daub97iL0;
1359         d->vertical_compose_h0 = (void*)vertical_compose_daub97iH0;
1360         d->vertical_compose_l1 = (void*)vertical_compose_daub97iL1;
1361         d->vertical_compose_h1 = (void*)vertical_compose_daub97iH1;
1362         d->horizontal_compose = horizontal_compose_daub97i;
1363         d->support = 5;
1364         break;
1365     default:
1366         av_log(NULL, AV_LOG_ERROR, "Unknown wavelet type %d\n", type);
1367         return -1;
1368     }
1369
1370     if (HAVE_MMX) ff_spatial_idwt_init_mmx(d, type);
1371
1372     return 0;
1373 }
1374
1375 void ff_spatial_idwt_slice2(DWTContext *d, int y)
1376 {
1377     int level, support = d->support;
1378
1379     for (level = d->decomposition_count-1; level >= 0; level--) {
1380         int wl = d->width  >> level;
1381         int hl = d->height >> level;
1382         int stride_l = d->stride << level;
1383
1384         while (d->cs[level].y <= FFMIN((y>>level)+support, hl))
1385             d->spatial_compose(d, level, wl, hl, stride_l);
1386     }
1387 }
1388
1389 int ff_spatial_idwt2(IDWTELEM *buffer, int width, int height, int stride,
1390                      enum dwt_type type, int decomposition_count, IDWTELEM *temp)
1391 {
1392     DWTContext d;
1393     int y;
1394
1395     if (ff_spatial_idwt_init2(&d, buffer, width, height, stride, type, decomposition_count, temp))
1396         return -1;
1397
1398     for (y = 0; y < d.height; y += 4)
1399         ff_spatial_idwt_slice2(&d, y);
1400
1401     return 0;
1402 }