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 "snow_dwt.h" 27 28int ff_slice_buffer_init(slice_buffer *buf, int line_count, 29 int max_allocated_lines, int line_width, 30 IDWTELEM *base_buffer) 31{ 32 int i; 33 34 buf->base_buffer = base_buffer; 35 buf->line_count = line_count; 36 buf->line_width = line_width; 37 buf->data_count = max_allocated_lines; 38 buf->line = av_mallocz_array(line_count, sizeof(IDWTELEM *)); 39 if (!buf->line) 40 return AVERROR(ENOMEM); 41 buf->data_stack = av_malloc_array(max_allocated_lines, sizeof(IDWTELEM *)); 42 if (!buf->data_stack) { 43 av_freep(&buf->line); 44 return AVERROR(ENOMEM); 45 } 46 47 for (i = 0; i < max_allocated_lines; i++) { 48 buf->data_stack[i] = av_malloc_array(line_width, sizeof(IDWTELEM)); 49 if (!buf->data_stack[i]) { 50 for (i--; i >=0; i--) 51 av_freep(&buf->data_stack[i]); 52 av_freep(&buf->data_stack); 53 av_freep(&buf->line); 54 return AVERROR(ENOMEM); 55 } 56 } 57 58 buf->data_stack_top = max_allocated_lines - 1; 59 return 0; 60} 61 62IDWTELEM *ff_slice_buffer_load_line(slice_buffer *buf, int line) 63{ 64 IDWTELEM *buffer; 65 66 av_assert0(buf->data_stack_top >= 0); 67// av_assert1(!buf->line[line]); 68 if (buf->line[line]) 69 return buf->line[line]; 70 71 buffer = buf->data_stack[buf->data_stack_top]; 72 buf->data_stack_top--; 73 buf->line[line] = buffer; 74 75 return buffer; 76} 77 78void ff_slice_buffer_release(slice_buffer *buf, int line) 79{ 80 IDWTELEM *buffer; 81 82 av_assert1(line >= 0 && line < buf->line_count); 83 av_assert1(buf->line[line]); 84 85 buffer = buf->line[line]; 86 buf->data_stack_top++; 87 buf->data_stack[buf->data_stack_top] = buffer; 88 buf->line[line] = NULL; 89} 90 91void ff_slice_buffer_flush(slice_buffer *buf) 92{ 93 int i; 94 for (i = 0; i < buf->line_count; i++) 95 if (buf->line[i]) 96 ff_slice_buffer_release(buf, i); 97} 98 99void ff_slice_buffer_destroy(slice_buffer *buf) 100{ 101 int i; 102 ff_slice_buffer_flush(buf); 103 104 for (i = buf->data_count - 1; i >= 0; i--) 105 av_freep(&buf->data_stack[i]); 106 av_freep(&buf->data_stack); 107 av_freep(&buf->line); 108} 109 110static inline int mirror(int v, int m) 111{ 112 while ((unsigned)v > (unsigned)m) { 113 v = -v; 114 if (v < 0) 115 v += 2 * m; 116 } 117 return v; 118} 119 120static av_always_inline void lift(DWTELEM *dst, DWTELEM *src, DWTELEM *ref, 121 int dst_step, int src_step, int ref_step, 122 int width, int mul, int add, int shift, 123 int highpass, int inverse) 124{ 125 const int mirror_left = !highpass; 126 const int mirror_right = (width & 1) ^ highpass; 127 const int w = (width >> 1) - 1 + (highpass & width); 128 int i; 129 130#define LIFT(src, ref, inv) ((src) + ((inv) ? -(ref) : +(ref))) 131 if (mirror_left) { 132 dst[0] = LIFT(src[0], ((mul * 2 * ref[0] + add) >> shift), inverse); 133 dst += dst_step; 134 src += src_step; 135 } 136 137 for (i = 0; i < w; i++) 138 dst[i * dst_step] = LIFT(src[i * src_step], 139 ((mul * (ref[i * ref_step] + 140 ref[(i + 1) * ref_step]) + 141 add) >> shift), 142 inverse); 143 144 if (mirror_right) 145 dst[w * dst_step] = LIFT(src[w * src_step], 146 ((mul * 2 * ref[w * ref_step] + add) >> shift), 147 inverse); 148} 149 150static av_always_inline void liftS(DWTELEM *dst, DWTELEM *src, DWTELEM *ref, 151 int dst_step, int src_step, int ref_step, 152 int width, int mul, int add, int shift, 153 int highpass, int inverse) 154{ 155 const int mirror_left = !highpass; 156 const int mirror_right = (width & 1) ^ highpass; 157 const int w = (width >> 1) - 1 + (highpass & width); 158 int i; 159 160 av_assert1(shift == 4); 161#define LIFTS(src, ref, inv) \ 162 ((inv) ? (src) + (((ref) + 4 * (src)) >> shift) \ 163 : -((-16 * (src) + (ref) + add / \ 164 4 + 1 + (5 << 25)) / (5 * 4) - (1 << 23))) 165 if (mirror_left) { 166 dst[0] = LIFTS(src[0], mul * 2 * ref[0] + add, inverse); 167 dst += dst_step; 168 src += src_step; 169 } 170 171 for (i = 0; i < w; i++) 172 dst[i * dst_step] = LIFTS(src[i * src_step], 173 mul * (ref[i * ref_step] + 174 ref[(i + 1) * ref_step]) + add, 175 inverse); 176 177 if (mirror_right) 178 dst[w * dst_step] = LIFTS(src[w * src_step], 179 mul * 2 * ref[w * ref_step] + add, 180 inverse); 181} 182 183static void horizontal_decompose53i(DWTELEM *b, DWTELEM *temp, int width) 184{ 185 const int width2 = width >> 1; 186 int x; 187 const int w2 = (width + 1) >> 1; 188 189 for (x = 0; x < width2; x++) { 190 temp[x] = b[2 * x]; 191 temp[x + w2] = b[2 * x + 1]; 192 } 193 if (width & 1) 194 temp[x] = b[2 * x]; 195 lift(b + w2, temp + w2, temp, 1, 1, 1, width, -1, 0, 1, 1, 0); 196 lift(b, temp, b + w2, 1, 1, 1, width, 1, 2, 2, 0, 0); 197} 198 199static void vertical_decompose53iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, 200 int width) 201{ 202 int i; 203 204 for (i = 0; i < width; i++) 205 b1[i] -= (b0[i] + b2[i]) >> 1; 206} 207 208static void vertical_decompose53iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, 209 int width) 210{ 211 int i; 212 213 for (i = 0; i < width; i++) 214 b1[i] += (b0[i] + b2[i] + 2) >> 2; 215} 216 217static void spatial_decompose53i(DWTELEM *buffer, DWTELEM *temp, 218 int width, int height, int stride) 219{ 220 int y; 221 DWTELEM *b0 = buffer + mirror(-2 - 1, height - 1) * stride; 222 DWTELEM *b1 = buffer + mirror(-2, height - 1) * stride; 223 224 for (y = -2; y < height; y += 2) { 225 DWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride; 226 DWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride; 227 228 if (y + 1 < (unsigned)height) 229 horizontal_decompose53i(b2, temp, width); 230 if (y + 2 < (unsigned)height) 231 horizontal_decompose53i(b3, temp, width); 232 233 if (y + 1 < (unsigned)height) 234 vertical_decompose53iH0(b1, b2, b3, width); 235 if (y + 0 < (unsigned)height) 236 vertical_decompose53iL0(b0, b1, b2, width); 237 238 b0 = b2; 239 b1 = b3; 240 } 241} 242 243static void horizontal_decompose97i(DWTELEM *b, DWTELEM *temp, int width) 244{ 245 const int w2 = (width + 1) >> 1; 246 247 lift(temp + w2, b + 1, b, 1, 2, 2, width, W_AM, W_AO, W_AS, 1, 1); 248 liftS(temp, b, temp + w2, 1, 2, 1, width, W_BM, W_BO, W_BS, 0, 0); 249 lift(b + w2, temp + w2, temp, 1, 1, 1, width, W_CM, W_CO, W_CS, 1, 0); 250 lift(b, temp, b + w2, 1, 1, 1, width, W_DM, W_DO, W_DS, 0, 0); 251} 252 253static void vertical_decompose97iH0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, 254 int width) 255{ 256 int i; 257 258 for (i = 0; i < width; i++) 259 b1[i] -= (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS; 260} 261 262static void vertical_decompose97iH1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, 263 int width) 264{ 265 int i; 266 267 for (i = 0; i < width; i++) 268 b1[i] += (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS; 269} 270 271static void vertical_decompose97iL0(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, 272 int width) 273{ 274 int i; 275 276 for (i = 0; i < width; i++) 277 b1[i] = (16 * 4 * b1[i] - 4 * (b0[i] + b2[i]) + W_BO * 5 + (5 << 27)) / 278 (5 * 16) - (1 << 23); 279} 280 281static void vertical_decompose97iL1(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, 282 int width) 283{ 284 int i; 285 286 for (i = 0; i < width; i++) 287 b1[i] += (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS; 288} 289 290static void spatial_decompose97i(DWTELEM *buffer, DWTELEM *temp, 291 int width, int height, int stride) 292{ 293 int y; 294 DWTELEM *b0 = buffer + mirror(-4 - 1, height - 1) * stride; 295 DWTELEM *b1 = buffer + mirror(-4, height - 1) * stride; 296 DWTELEM *b2 = buffer + mirror(-4 + 1, height - 1) * stride; 297 DWTELEM *b3 = buffer + mirror(-4 + 2, height - 1) * stride; 298 299 for (y = -4; y < height; y += 2) { 300 DWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride; 301 DWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride; 302 303 if (y + 3 < (unsigned)height) 304 horizontal_decompose97i(b4, temp, width); 305 if (y + 4 < (unsigned)height) 306 horizontal_decompose97i(b5, temp, width); 307 308 if (y + 3 < (unsigned)height) 309 vertical_decompose97iH0(b3, b4, b5, width); 310 if (y + 2 < (unsigned)height) 311 vertical_decompose97iL0(b2, b3, b4, width); 312 if (y + 1 < (unsigned)height) 313 vertical_decompose97iH1(b1, b2, b3, width); 314 if (y + 0 < (unsigned)height) 315 vertical_decompose97iL1(b0, b1, b2, width); 316 317 b0 = b2; 318 b1 = b3; 319 b2 = b4; 320 b3 = b5; 321 } 322} 323 324void ff_spatial_dwt(DWTELEM *buffer, DWTELEM *temp, int width, int height, 325 int stride, int type, int decomposition_count) 326{ 327 int level; 328 329 for (level = 0; level < decomposition_count; level++) { 330 switch (type) { 331 case DWT_97: 332 spatial_decompose97i(buffer, temp, 333 width >> level, height >> level, 334 stride << level); 335 break; 336 case DWT_53: 337 spatial_decompose53i(buffer, temp, 338 width >> level, height >> level, 339 stride << level); 340 break; 341 } 342 } 343} 344 345static void horizontal_compose53i(IDWTELEM *b, IDWTELEM *temp, int width) 346{ 347 const int width2 = width >> 1; 348 const int w2 = (width + 1) >> 1; 349 int x; 350 351 for (x = 0; x < width2; x++) { 352 temp[2 * x] = b[x]; 353 temp[2 * x + 1] = b[x + w2]; 354 } 355 if (width & 1) 356 temp[2 * x] = b[x]; 357 358 b[0] = temp[0] - ((temp[1] + 1) >> 1); 359 for (x = 2; x < width - 1; x += 2) { 360 b[x] = temp[x] - ((temp[x - 1] + temp[x + 1] + 2) >> 2); 361 b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1); 362 } 363 if (width & 1) { 364 b[x] = temp[x] - ((temp[x - 1] + 1) >> 1); 365 b[x - 1] = temp[x - 1] + ((b[x - 2] + b[x] + 1) >> 1); 366 } else 367 b[x - 1] = temp[x - 1] + b[x - 2]; 368} 369 370static void vertical_compose53iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, 371 int width) 372{ 373 int i; 374 375 for (i = 0; i < width; i++) 376 b1[i] += (b0[i] + b2[i]) >> 1; 377} 378 379static void vertical_compose53iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, 380 int width) 381{ 382 int i; 383 384 for (i = 0; i < width; i++) 385 b1[i] -= (b0[i] + b2[i] + 2) >> 2; 386} 387 388static void spatial_compose53i_buffered_init(DWTCompose *cs, slice_buffer *sb, 389 int height, int stride_line) 390{ 391 cs->b0 = slice_buffer_get_line(sb, 392 mirror(-1 - 1, height - 1) * stride_line); 393 cs->b1 = slice_buffer_get_line(sb, mirror(-1, height - 1) * stride_line); 394 cs->y = -1; 395} 396 397static void spatial_compose53i_init(DWTCompose *cs, IDWTELEM *buffer, 398 int height, int stride) 399{ 400 cs->b0 = buffer + mirror(-1 - 1, height - 1) * stride; 401 cs->b1 = buffer + mirror(-1, height - 1) * stride; 402 cs->y = -1; 403} 404 405static void spatial_compose53i_dy_buffered(DWTCompose *cs, slice_buffer *sb, 406 IDWTELEM *temp, 407 int width, int height, 408 int stride_line) 409{ 410 int y = cs->y; 411 412 IDWTELEM *b0 = cs->b0; 413 IDWTELEM *b1 = cs->b1; 414 IDWTELEM *b2 = slice_buffer_get_line(sb, 415 mirror(y + 1, height - 1) * 416 stride_line); 417 IDWTELEM *b3 = slice_buffer_get_line(sb, 418 mirror(y + 2, height - 1) * 419 stride_line); 420 421 if (y + 1 < (unsigned)height && y < (unsigned)height) { 422 int x; 423 424 for (x = 0; x < width; x++) { 425 b2[x] -= (b1[x] + b3[x] + 2) >> 2; 426 b1[x] += (b0[x] + b2[x]) >> 1; 427 } 428 } else { 429 if (y + 1 < (unsigned)height) 430 vertical_compose53iL0(b1, b2, b3, width); 431 if (y + 0 < (unsigned)height) 432 vertical_compose53iH0(b0, b1, b2, width); 433 } 434 435 if (y - 1 < (unsigned)height) 436 horizontal_compose53i(b0, temp, width); 437 if (y + 0 < (unsigned)height) 438 horizontal_compose53i(b1, temp, width); 439 440 cs->b0 = b2; 441 cs->b1 = b3; 442 cs->y += 2; 443} 444 445static void spatial_compose53i_dy(DWTCompose *cs, IDWTELEM *buffer, 446 IDWTELEM *temp, int width, int height, 447 int stride) 448{ 449 int y = cs->y; 450 IDWTELEM *b0 = cs->b0; 451 IDWTELEM *b1 = cs->b1; 452 IDWTELEM *b2 = buffer + mirror(y + 1, height - 1) * stride; 453 IDWTELEM *b3 = buffer + mirror(y + 2, height - 1) * stride; 454 455 if (y + 1 < (unsigned)height) 456 vertical_compose53iL0(b1, b2, b3, width); 457 if (y + 0 < (unsigned)height) 458 vertical_compose53iH0(b0, b1, b2, width); 459 460 if (y - 1 < (unsigned)height) 461 horizontal_compose53i(b0, temp, width); 462 if (y + 0 < (unsigned)height) 463 horizontal_compose53i(b1, temp, width); 464 465 cs->b0 = b2; 466 cs->b1 = b3; 467 cs->y += 2; 468} 469 470void ff_snow_horizontal_compose97i(IDWTELEM *b, IDWTELEM *temp, int width) 471{ 472 const int w2 = (width + 1) >> 1; 473 int x; 474 475 temp[0] = b[0] - ((3 * b[w2] + 2) >> 2); 476 for (x = 1; x < (width >> 1); x++) { 477 temp[2 * x] = b[x] - ((3 * (b[x + w2 - 1] + b[x + w2]) + 4) >> 3); 478 temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x]; 479 } 480 if (width & 1) { 481 temp[2 * x] = b[x] - ((3 * b[x + w2 - 1] + 2) >> 2); 482 temp[2 * x - 1] = b[x + w2 - 1] - temp[2 * x - 2] - temp[2 * x]; 483 } else 484 temp[2 * x - 1] = b[x + w2 - 1] - 2 * temp[2 * x - 2]; 485 486 b[0] = temp[0] + ((2 * temp[0] + temp[1] + 4) >> 3); 487 for (x = 2; x < width - 1; x += 2) { 488 b[x] = temp[x] + ((4 * temp[x] + temp[x - 1] + temp[x + 1] + 8) >> 4); 489 b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1); 490 } 491 if (width & 1) { 492 b[x] = temp[x] + ((2 * temp[x] + temp[x - 1] + 4) >> 3); 493 b[x - 1] = temp[x - 1] + ((3 * (b[x - 2] + b[x])) >> 1); 494 } else 495 b[x - 1] = temp[x - 1] + 3 * b[x - 2]; 496} 497 498static void vertical_compose97iH0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, 499 int width) 500{ 501 int i; 502 503 for (i = 0; i < width; i++) 504 b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS; 505} 506 507static void vertical_compose97iH1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, 508 int width) 509{ 510 int i; 511 512 for (i = 0; i < width; i++) 513 b1[i] -= (W_CM * (b0[i] + b2[i]) + W_CO) >> W_CS; 514} 515 516static void vertical_compose97iL0(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, 517 int width) 518{ 519 int i; 520 521 for (i = 0; i < width; i++) 522 b1[i] += (W_BM * (b0[i] + b2[i]) + 4 * b1[i] + W_BO) >> W_BS; 523} 524 525static void vertical_compose97iL1(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, 526 int width) 527{ 528 int i; 529 530 for (i = 0; i < width; i++) 531 b1[i] -= (W_DM * (b0[i] + b2[i]) + W_DO) >> W_DS; 532} 533 534void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, 535 IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, 536 int width) 537{ 538 int i; 539 540 for (i = 0; i < width; i++) { 541 b4[i] -= (W_DM * (b3[i] + b5[i]) + W_DO) >> W_DS; 542 b3[i] -= (W_CM * (b2[i] + b4[i]) + W_CO) >> W_CS; 543 b2[i] += (W_BM * (b1[i] + b3[i]) + 4 * b2[i] + W_BO) >> W_BS; 544 b1[i] += (W_AM * (b0[i] + b2[i]) + W_AO) >> W_AS; 545 } 546} 547 548static void spatial_compose97i_buffered_init(DWTCompose *cs, slice_buffer *sb, 549 int height, int stride_line) 550{ 551 cs->b0 = slice_buffer_get_line(sb, mirror(-3 - 1, height - 1) * stride_line); 552 cs->b1 = slice_buffer_get_line(sb, mirror(-3, height - 1) * stride_line); 553 cs->b2 = slice_buffer_get_line(sb, mirror(-3 + 1, height - 1) * stride_line); 554 cs->b3 = slice_buffer_get_line(sb, mirror(-3 + 2, height - 1) * stride_line); 555 cs->y = -3; 556} 557 558static void spatial_compose97i_init(DWTCompose *cs, IDWTELEM *buffer, int height, 559 int stride) 560{ 561 cs->b0 = buffer + mirror(-3 - 1, height - 1) * stride; 562 cs->b1 = buffer + mirror(-3, height - 1) * stride; 563 cs->b2 = buffer + mirror(-3 + 1, height - 1) * stride; 564 cs->b3 = buffer + mirror(-3 + 2, height - 1) * stride; 565 cs->y = -3; 566} 567 568static void spatial_compose97i_dy_buffered(SnowDWTContext *dsp, DWTCompose *cs, 569 slice_buffer * sb, IDWTELEM *temp, 570 int width, int height, 571 int stride_line) 572{ 573 int y = cs->y; 574 575 IDWTELEM *b0 = cs->b0; 576 IDWTELEM *b1 = cs->b1; 577 IDWTELEM *b2 = cs->b2; 578 IDWTELEM *b3 = cs->b3; 579 IDWTELEM *b4 = slice_buffer_get_line(sb, 580 mirror(y + 3, height - 1) * 581 stride_line); 582 IDWTELEM *b5 = slice_buffer_get_line(sb, 583 mirror(y + 4, height - 1) * 584 stride_line); 585 586 if (y > 0 && y + 4 < height) { 587 dsp->vertical_compose97i(b0, b1, b2, b3, b4, b5, width); 588 } else { 589 if (y + 3 < (unsigned)height) 590 vertical_compose97iL1(b3, b4, b5, width); 591 if (y + 2 < (unsigned)height) 592 vertical_compose97iH1(b2, b3, b4, width); 593 if (y + 1 < (unsigned)height) 594 vertical_compose97iL0(b1, b2, b3, width); 595 if (y + 0 < (unsigned)height) 596 vertical_compose97iH0(b0, b1, b2, width); 597 } 598 599 if (y - 1 < (unsigned)height) 600 dsp->horizontal_compose97i(b0, temp, width); 601 if (y + 0 < (unsigned)height) 602 dsp->horizontal_compose97i(b1, temp, width); 603 604 cs->b0 = b2; 605 cs->b1 = b3; 606 cs->b2 = b4; 607 cs->b3 = b5; 608 cs->y += 2; 609} 610 611static void spatial_compose97i_dy(DWTCompose *cs, IDWTELEM *buffer, 612 IDWTELEM *temp, int width, int height, 613 int stride) 614{ 615 int y = cs->y; 616 IDWTELEM *b0 = cs->b0; 617 IDWTELEM *b1 = cs->b1; 618 IDWTELEM *b2 = cs->b2; 619 IDWTELEM *b3 = cs->b3; 620 IDWTELEM *b4 = buffer + mirror(y + 3, height - 1) * stride; 621 IDWTELEM *b5 = buffer + mirror(y + 4, height - 1) * stride; 622 623 if (y + 3 < (unsigned)height) 624 vertical_compose97iL1(b3, b4, b5, width); 625 if (y + 2 < (unsigned)height) 626 vertical_compose97iH1(b2, b3, b4, width); 627 if (y + 1 < (unsigned)height) 628 vertical_compose97iL0(b1, b2, b3, width); 629 if (y + 0 < (unsigned)height) 630 vertical_compose97iH0(b0, b1, b2, width); 631 632 if (y - 1 < (unsigned)height) 633 ff_snow_horizontal_compose97i(b0, temp, width); 634 if (y + 0 < (unsigned)height) 635 ff_snow_horizontal_compose97i(b1, temp, width); 636 637 cs->b0 = b2; 638 cs->b1 = b3; 639 cs->b2 = b4; 640 cs->b3 = b5; 641 cs->y += 2; 642} 643 644void ff_spatial_idwt_buffered_init(DWTCompose *cs, slice_buffer *sb, int width, 645 int height, int stride_line, int type, 646 int decomposition_count) 647{ 648 int level; 649 for (level = decomposition_count - 1; level >= 0; level--) { 650 switch (type) { 651 case DWT_97: 652 spatial_compose97i_buffered_init(cs + level, sb, height >> level, 653 stride_line << level); 654 break; 655 case DWT_53: 656 spatial_compose53i_buffered_init(cs + level, sb, height >> level, 657 stride_line << level); 658 break; 659 } 660 } 661} 662 663void ff_spatial_idwt_buffered_slice(SnowDWTContext *dsp, DWTCompose *cs, 664 slice_buffer *slice_buf, IDWTELEM *temp, 665 int width, int height, int stride_line, 666 int type, int decomposition_count, int y) 667{ 668 const int support = type == 1 ? 3 : 5; 669 int level; 670 if (type == 2) 671 return; 672 673 for (level = decomposition_count - 1; level >= 0; level--) 674 while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) { 675 switch (type) { 676 case DWT_97: 677 spatial_compose97i_dy_buffered(dsp, cs + level, slice_buf, temp, 678 width >> level, 679 height >> level, 680 stride_line << level); 681 break; 682 case DWT_53: 683 spatial_compose53i_dy_buffered(cs + level, slice_buf, temp, 684 width >> level, 685 height >> level, 686 stride_line << level); 687 break; 688 } 689 } 690} 691 692static void ff_spatial_idwt_init(DWTCompose *cs, IDWTELEM *buffer, int width, 693 int height, int stride, int type, 694 int decomposition_count) 695{ 696 int level; 697 for (level = decomposition_count - 1; level >= 0; level--) { 698 switch (type) { 699 case DWT_97: 700 spatial_compose97i_init(cs + level, buffer, height >> level, 701 stride << level); 702 break; 703 case DWT_53: 704 spatial_compose53i_init(cs + level, buffer, height >> level, 705 stride << level); 706 break; 707 } 708 } 709} 710 711static void ff_spatial_idwt_slice(DWTCompose *cs, IDWTELEM *buffer, 712 IDWTELEM *temp, int width, int height, 713 int stride, int type, 714 int decomposition_count, int y) 715{ 716 const int support = type == 1 ? 3 : 5; 717 int level; 718 if (type == 2) 719 return; 720 721 for (level = decomposition_count - 1; level >= 0; level--) 722 while (cs[level].y <= FFMIN((y >> level) + support, height >> level)) { 723 switch (type) { 724 case DWT_97: 725 spatial_compose97i_dy(cs + level, buffer, temp, width >> level, 726 height >> level, stride << level); 727 break; 728 case DWT_53: 729 spatial_compose53i_dy(cs + level, buffer, temp, width >> level, 730 height >> level, stride << level); 731 break; 732 } 733 } 734} 735 736void ff_spatial_idwt(IDWTELEM *buffer, IDWTELEM *temp, int width, int height, 737 int stride, int type, int decomposition_count) 738{ 739 DWTCompose cs[MAX_DECOMPOSITIONS]; 740 int y; 741 ff_spatial_idwt_init(cs, buffer, width, height, stride, type, 742 decomposition_count); 743 for (y = 0; y < height; y += 4) 744 ff_spatial_idwt_slice(cs, buffer, temp, width, height, stride, type, 745 decomposition_count, y); 746} 747 748static inline int w_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, 749 int w, int h, int type) 750{ 751 int s, i, j; 752 const int dec_count = w == 8 ? 3 : 4; 753 int tmp[32 * 32], tmp2[32]; 754 int level, ori; 755 static const int scale[2][2][4][4] = { 756 { 757 { // 9/7 8x8 dec=3 758 { 268, 239, 239, 213 }, 759 { 0, 224, 224, 152 }, 760 { 0, 135, 135, 110 }, 761 }, 762 { // 9/7 16x16 or 32x32 dec=4 763 { 344, 310, 310, 280 }, 764 { 0, 320, 320, 228 }, 765 { 0, 175, 175, 136 }, 766 { 0, 129, 129, 102 }, 767 } 768 }, 769 { 770 { // 5/3 8x8 dec=3 771 { 275, 245, 245, 218 }, 772 { 0, 230, 230, 156 }, 773 { 0, 138, 138, 113 }, 774 }, 775 { // 5/3 16x16 or 32x32 dec=4 776 { 352, 317, 317, 286 }, 777 { 0, 328, 328, 233 }, 778 { 0, 180, 180, 140 }, 779 { 0, 132, 132, 105 }, 780 } 781 } 782 }; 783 784 for (i = 0; i < h; i++) { 785 for (j = 0; j < w; j += 4) { 786 tmp[32 * i + j + 0] = (pix1[j + 0] - pix2[j + 0]) << 4; 787 tmp[32 * i + j + 1] = (pix1[j + 1] - pix2[j + 1]) << 4; 788 tmp[32 * i + j + 2] = (pix1[j + 2] - pix2[j + 2]) << 4; 789 tmp[32 * i + j + 3] = (pix1[j + 3] - pix2[j + 3]) << 4; 790 } 791 pix1 += line_size; 792 pix2 += line_size; 793 } 794 795 ff_spatial_dwt(tmp, tmp2, w, h, 32, type, dec_count); 796 797 s = 0; 798 av_assert1(w == h); 799 for (level = 0; level < dec_count; level++) 800 for (ori = level ? 1 : 0; ori < 4; ori++) { 801 int size = w >> (dec_count - level); 802 int sx = (ori & 1) ? size : 0; 803 int stride = 32 << (dec_count - level); 804 int sy = (ori & 2) ? stride >> 1 : 0; 805 806 for (i = 0; i < size; i++) 807 for (j = 0; j < size; j++) { 808 int v = tmp[sx + sy + i * stride + j] * 809 scale[type][dec_count - 3][level][ori]; 810 s += FFABS(v); 811 } 812 } 813 av_assert1(s >= 0); 814 return s >> 9; 815} 816 817static int w53_8_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h) 818{ 819 return w_c(v, pix1, pix2, line_size, 8, h, 1); 820} 821 822static int w97_8_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h) 823{ 824 return w_c(v, pix1, pix2, line_size, 8, h, 0); 825} 826 827static int w53_16_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h) 828{ 829 return w_c(v, pix1, pix2, line_size, 16, h, 1); 830} 831 832static int w97_16_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h) 833{ 834 return w_c(v, pix1, pix2, line_size, 16, h, 0); 835} 836 837int ff_w53_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h) 838{ 839 return w_c(v, pix1, pix2, line_size, 32, h, 1); 840} 841 842int ff_w97_32_c(struct MpegEncContext *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h) 843{ 844 return w_c(v, pix1, pix2, line_size, 32, h, 0); 845} 846 847void ff_dsputil_init_dwt(DSPContext *c) 848{ 849 c->w53[0] = w53_16_c; 850 c->w53[1] = w53_8_c; 851 c->w97[0] = w97_16_c; 852 c->w97[1] = w97_8_c; 853} 854 855void ff_dwt_init(SnowDWTContext *c) 856{ 857 c->vertical_compose97i = ff_snow_vertical_compose97i; 858 c->horizontal_compose97i = ff_snow_horizontal_compose97i; 859 c->inner_add_yblock = ff_snow_inner_add_yblock; 860 861 if (HAVE_MMX) 862 ff_dwt_init_x86(c); 863} 864 865 866