pickrst.c 45.1 KB
Newer Older
1
/*
2
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
3
 *
4
5
6
7
8
9
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
10
11
12
 */

#include <assert.h>
13
#include <float.h>
14
15
16
#include <limits.h>
#include <math.h>

Yaowu Xu's avatar
Yaowu Xu committed
17
#include "./aom_scale_rtcd.h"
18

19
#include "aom_dsp/psnr.h"
Yaowu Xu's avatar
Yaowu Xu committed
20
21
#include "aom_dsp/aom_dsp_common.h"
#include "aom_mem/aom_mem.h"
22
#include "aom_ports/mem.h"
23

24
25
#include "av1/common/onyxc_int.h"
#include "av1/common/quant_common.h"
26

27
28
29
30
#include "av1/encoder/encoder.h"
#include "av1/encoder/picklpf.h"
#include "av1/encoder/pickrst.h"
#include "av1/encoder/quantize.h"
31

32
33
34
typedef double (*search_restore_type)(const YV12_BUFFER_CONFIG *src,
                                      AV1_COMP *cpi, int filter_level,
                                      int partial_frame, RestorationInfo *info,
35
36
                                      double *best_tile_cost,
                                      YV12_BUFFER_CONFIG *dst_frame);
37

38
const int frame_level_restore_bits[RESTORE_TYPES] = { 2, 2, 3, 3, 2 };
39
40

static int64_t sse_restoration_tile(const YV12_BUFFER_CONFIG *src,
41
42
                                    const YV12_BUFFER_CONFIG *dst,
                                    const AV1_COMMON *cm, int h_start,
43
44
                                    int width, int v_start, int height,
                                    int y_only) {
45
46
47
  int64_t filt_err;
#if CONFIG_AOM_HIGHBITDEPTH
  if (cm->use_highbitdepth) {
48
49
    filt_err =
        aom_highbd_get_y_sse_part(src, dst, h_start, width, v_start, height);
50
51
52
53
54
55
56
57
58
    if (!y_only) {
      filt_err += aom_highbd_get_u_sse_part(
          src, dst, h_start >> cm->subsampling_x, width >> cm->subsampling_x,
          v_start >> cm->subsampling_y, height >> cm->subsampling_y);
      filt_err += aom_highbd_get_v_sse_part(
          src, dst, h_start >> cm->subsampling_x, width >> cm->subsampling_x,
          v_start >> cm->subsampling_y, height >> cm->subsampling_y);
    }
    return filt_err;
59
60
  }
#endif  // CONFIG_AOM_HIGHBITDEPTH
61
62
63
64
65
66
67
68
69
  filt_err = aom_get_y_sse_part(src, dst, h_start, width, v_start, height);
  if (!y_only) {
    filt_err += aom_get_u_sse_part(
        src, dst, h_start >> cm->subsampling_x, width >> cm->subsampling_x,
        v_start >> cm->subsampling_y, height >> cm->subsampling_y);
    filt_err += aom_get_u_sse_part(
        src, dst, h_start >> cm->subsampling_x, width >> cm->subsampling_x,
        v_start >> cm->subsampling_y, height >> cm->subsampling_y);
  }
70
71
72
73
74
  return filt_err;
}

static int64_t try_restoration_tile(const YV12_BUFFER_CONFIG *src,
                                    AV1_COMP *const cpi, RestorationInfo *rsi,
75
                                    int y_only, int partial_frame, int tile_idx,
76
77
                                    int subtile_idx, int subtile_bits,
                                    YV12_BUFFER_CONFIG *dst_frame) {
78
79
80
81
82
83
84
85
  AV1_COMMON *const cm = &cpi->common;
  int64_t filt_err;
  int tile_width, tile_height, nhtiles, nvtiles;
  int h_start, h_end, v_start, v_end;
  const int ntiles = av1_get_rest_ntiles(cm->width, cm->height, &tile_width,
                                         &tile_height, &nhtiles, &nvtiles);
  (void)ntiles;

86
  av1_loop_restoration_frame(cm->frame_to_show, cm, rsi, y_only, partial_frame,
87
                             dst_frame);
88
89
90
91
  av1_get_rest_tile_limits(tile_idx, subtile_idx, subtile_bits, nhtiles,
                           nvtiles, tile_width, tile_height, cm->width,
                           cm->height, 0, 0, &h_start, &h_end, &v_start,
                           &v_end);
92
  filt_err = sse_restoration_tile(src, dst_frame, cm, h_start, h_end - h_start,
93
                                  v_start, v_end - v_start, y_only);
94
95
96
97
98

  return filt_err;
}

static int64_t try_restoration_frame(const YV12_BUFFER_CONFIG *src,
Yaowu Xu's avatar
Yaowu Xu committed
99
                                     AV1_COMP *const cpi, RestorationInfo *rsi,
100
                                     int y_only, int partial_frame,
101
                                     YV12_BUFFER_CONFIG *dst_frame) {
Yaowu Xu's avatar
Yaowu Xu committed
102
  AV1_COMMON *const cm = &cpi->common;
103
  int64_t filt_err;
104
  av1_loop_restoration_frame(cm->frame_to_show, cm, rsi, y_only, partial_frame,
105
                             dst_frame);
Yaowu Xu's avatar
Yaowu Xu committed
106
#if CONFIG_AOM_HIGHBITDEPTH
107
  if (cm->use_highbitdepth) {
108
    filt_err = aom_highbd_get_y_sse(src, dst_frame);
109
110
111
112
113
    if (!y_only) {
      filt_err += aom_highbd_get_u_sse(src, dst_frame);
      filt_err += aom_highbd_get_v_sse(src, dst_frame);
    }
    return filt_err;
114
  }
Yaowu Xu's avatar
Yaowu Xu committed
115
#endif  // CONFIG_AOM_HIGHBITDEPTH
116
117
118
119
120
  filt_err = aom_get_y_sse(src, dst_frame);
  if (!y_only) {
    filt_err += aom_get_u_sse(src, dst_frame);
    filt_err += aom_get_v_sse(src, dst_frame);
  }
121
122
123
  return filt_err;
}

124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
static int64_t get_pixel_proj_error(int64_t *src, int width, int height,
                                    int src_stride, int64_t *dgd,
                                    int dgd_stride, int64_t *flt1,
                                    int flt1_stride, int64_t *flt2,
                                    int flt2_stride, int *xqd) {
  int i, j;
  int64_t err = 0;
  int xq[2];
  decode_xq(xqd, xq);
  for (i = 0; i < height; ++i) {
    for (j = 0; j < width; ++j) {
      const int64_t s = (int64_t)src[i * src_stride + j];
      const int64_t u = (int64_t)dgd[i * dgd_stride + j];
      const int64_t f1 = (int64_t)flt1[i * flt1_stride + j] - u;
      const int64_t f2 = (int64_t)flt2[i * flt2_stride + j] - u;
      const int64_t v = xq[0] * f1 + xq[1] * f2 + (u << SGRPROJ_PRJ_BITS);
      const int64_t e =
          ROUND_POWER_OF_TWO(v, SGRPROJ_RST_BITS + SGRPROJ_PRJ_BITS) -
          ROUND_POWER_OF_TWO(s, SGRPROJ_RST_BITS);
      err += e * e;
    }
  }
  return err;
}

static void get_proj_subspace(int64_t *src, int width, int height,
                              int src_stride, int64_t *dgd, int dgd_stride,
                              int64_t *flt1, int flt1_stride, int64_t *flt2,
                              int flt2_stride, int *xq) {
  int i, j;
  double H[2][2] = { { 0, 0 }, { 0, 0 } };
  double C[2] = { 0, 0 };
  double Det;
  double x[2];
  const int size = width * height;

  xq[0] = -(1 << SGRPROJ_PRJ_BITS) / 4;
  xq[1] = (1 << SGRPROJ_PRJ_BITS) - xq[0];
  for (i = 0; i < height; ++i) {
    for (j = 0; j < width; ++j) {
      const double u = (double)dgd[i * dgd_stride + j];
      const double s = (double)src[i * src_stride + j] - u;
      const double f1 = (double)flt1[i * flt1_stride + j] - u;
      const double f2 = (double)flt2[i * flt2_stride + j] - u;
      H[0][0] += f1 * f1;
      H[1][1] += f2 * f2;
      H[0][1] += f1 * f2;
      C[0] += f1 * s;
      C[1] += f2 * s;
    }
  }
  H[0][0] /= size;
  H[0][1] /= size;
  H[1][1] /= size;
  H[1][0] = H[0][1];
  C[0] /= size;
  C[1] /= size;
  Det = (H[0][0] * H[1][1] - H[0][1] * H[1][0]);
  if (Det < 1e-8) return;  // ill-posed, return default values
  x[0] = (H[1][1] * C[0] - H[0][1] * C[1]) / Det;
  x[1] = (H[0][0] * C[1] - H[1][0] * C[0]) / Det;
  xq[0] = (int)rint(x[0] * (1 << SGRPROJ_PRJ_BITS));
  xq[1] = (int)rint(x[1] * (1 << SGRPROJ_PRJ_BITS));
}

void encode_xq(int *xq, int *xqd) {
  xqd[0] = -xq[0];
  xqd[0] = clamp(xqd[0], SGRPROJ_PRJ_MIN0, SGRPROJ_PRJ_MAX0);
  xqd[1] = (1 << SGRPROJ_PRJ_BITS) + xqd[0] - xq[1];
  xqd[1] = clamp(xqd[1], SGRPROJ_PRJ_MIN1, SGRPROJ_PRJ_MAX1);
}

static void search_selfguided_restoration(uint8_t *dat8, int width, int height,
                                          int dat_stride, uint8_t *src8,
                                          int src_stride, int bit_depth,
199
200
201
202
                                          int *eps, int *xqd, void *srcbuf,
                                          void *tmpbuf) {
  int64_t *srd = (int64_t *)srcbuf;
  int64_t *dgd = (int64_t *)tmpbuf;
203
  int64_t *flt1 = dgd + RESTORATION_TILEPELS_MAX;
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
  int64_t *flt2 = flt1 + RESTORATION_TILEPELS_MAX;
  uint8_t *tmpbuf2 = (uint8_t *)(flt2 + RESTORATION_TILEPELS_MAX);
  int i, j, ep, bestep = 0;
  int64_t err, besterr = -1;
  int exqd[2], bestxqd[2] = { 0, 0 };
  for (ep = 0; ep < SGRPROJ_PARAMS; ep++) {
    int exq[2];
    if (bit_depth > 8) {
      uint16_t *src = CONVERT_TO_SHORTPTR(src8);
      uint16_t *dat = CONVERT_TO_SHORTPTR(dat8);
      for (i = 0; i < height; ++i) {
        for (j = 0; j < width; ++j) {
          flt1[i * width + j] = (int64_t)dat[i * dat_stride + j];
          flt2[i * width + j] = (int64_t)dat[i * dat_stride + j];
          dgd[i * width + j] = (int64_t)dat[i * dat_stride + j]
                               << SGRPROJ_RST_BITS;
          srd[i * width + j] = (int64_t)src[i * src_stride + j]
                               << SGRPROJ_RST_BITS;
        }
      }
    } else {
      uint8_t *src = src8;
      uint8_t *dat = dat8;
      for (i = 0; i < height; ++i) {
        for (j = 0; j < width; ++j) {
          const int k = i * width + j;
          const int l = i * dat_stride + j;
          flt1[k] = (int64_t)dat[l];
          flt2[k] = (int64_t)dat[l];
          dgd[k] = (int64_t)dat[l] << SGRPROJ_RST_BITS;
          srd[k] = (int64_t)src[i * src_stride + j] << SGRPROJ_RST_BITS;
        }
      }
    }
    av1_selfguided_restoration(flt1, width, height, width, bit_depth,
                               sgr_params[ep].r1, sgr_params[ep].e1, tmpbuf2);
    av1_selfguided_restoration(flt2, width, height, width, bit_depth,
                               sgr_params[ep].r2, sgr_params[ep].e2, tmpbuf2);
    get_proj_subspace(srd, width, height, width, dgd, width, flt1, width, flt2,
                      width, exq);
    encode_xq(exq, exqd);
    err = get_pixel_proj_error(srd, width, height, width, dgd, width, flt1,
                               width, flt2, width, exqd);
    if (besterr == -1 || err < besterr) {
      bestep = ep;
      besterr = err;
      bestxqd[0] = exqd[0];
      bestxqd[1] = exqd[1];
    }
  }
  *eps = bestep;
  xqd[0] = bestxqd[0];
  xqd[1] = bestxqd[1];
}

static double search_sgrproj(const YV12_BUFFER_CONFIG *src, AV1_COMP *cpi,
                             int filter_level, int partial_frame,
261
262
                             RestorationInfo *info, double *best_tile_cost,
                             YV12_BUFFER_CONFIG *dst_frame) {
263
264
265
266
267
268
269
270
271
  SgrprojInfo *sgrproj_info = info->sgrproj_info;
  double err, cost_norestore, cost_sgrproj;
  int bits;
  MACROBLOCK *x = &cpi->td.mb;
  AV1_COMMON *const cm = &cpi->common;
  const YV12_BUFFER_CONFIG *dgd = cm->frame_to_show;
  RestorationInfo rsi;
  int tile_idx, tile_width, tile_height, nhtiles, nvtiles;
  int h_start, h_end, v_start, v_end;
272
  // Allocate for the src buffer at high precision
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
  const int ntiles = av1_get_rest_ntiles(cm->width, cm->height, &tile_width,
                                         &tile_height, &nhtiles, &nvtiles);
  //  Make a copy of the unfiltered / processed recon buffer
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
  av1_loop_filter_frame(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, filter_level,
                        1, partial_frame);
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_db);

  rsi.frame_restoration_type = RESTORE_SGRPROJ;
  rsi.sgrproj_info =
      (SgrprojInfo *)aom_malloc(sizeof(*rsi.sgrproj_info) * ntiles);
  assert(rsi.sgrproj_info != NULL);

  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx)
    rsi.sgrproj_info[tile_idx].level = 0;
  // Compute best Sgrproj filters for each tile
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
    av1_get_rest_tile_limits(tile_idx, 0, 0, nhtiles, nvtiles, tile_width,
                             tile_height, cm->width, cm->height, 0, 0, &h_start,
                             &h_end, &v_start, &v_end);
293
    err = sse_restoration_tile(src, cm->frame_to_show, cm, h_start,
294
                               h_end - h_start, v_start, v_end - v_start, 1);
295
296
297
298
299
300
301
302
303
304
305
306
307
    // #bits when a tile is not restored
    bits = av1_cost_bit(RESTORE_NONE_SGRPROJ_PROB, 0);
    cost_norestore = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
    best_tile_cost[tile_idx] = DBL_MAX;
    search_selfguided_restoration(
        dgd->y_buffer + v_start * dgd->y_stride + h_start, h_end - h_start,
        v_end - v_start, dgd->y_stride,
        src->y_buffer + v_start * src->y_stride + h_start, src->y_stride,
#if CONFIG_AOM_HIGHBITDEPTH
        cm->bit_depth,
#else
        8,
#endif  // CONFIG_AOM_HIGHBITDEPTH
308
309
        &rsi.sgrproj_info[tile_idx].ep, rsi.sgrproj_info[tile_idx].xqd,
        cpi->highprec_srcbuf, cm->rst_internal.tmpbuf);
310
    rsi.sgrproj_info[tile_idx].level = 1;
311
    err = try_restoration_tile(src, cpi, &rsi, 1, partial_frame, tile_idx, 0, 0,
312
                               dst_frame);
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
    bits = SGRPROJ_BITS << AV1_PROB_COST_SHIFT;
    bits += av1_cost_bit(RESTORE_NONE_SGRPROJ_PROB, 1);
    cost_sgrproj = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
    if (cost_sgrproj >= cost_norestore) {
      sgrproj_info[tile_idx].level = 0;
    } else {
      memcpy(&sgrproj_info[tile_idx], &rsi.sgrproj_info[tile_idx],
             sizeof(sgrproj_info[tile_idx]));
      bits = SGRPROJ_BITS << AV1_PROB_COST_SHIFT;
      best_tile_cost[tile_idx] = RDCOST_DBL(
          x->rdmult, x->rddiv,
          (bits + cpi->switchable_restore_cost[RESTORE_SGRPROJ]) >> 4, err);
    }
    rsi.sgrproj_info[tile_idx].level = 0;
  }
  // Cost for Sgrproj filtering
  bits = frame_level_restore_bits[rsi.frame_restoration_type]
         << AV1_PROB_COST_SHIFT;
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
    bits +=
        av1_cost_bit(RESTORE_NONE_SGRPROJ_PROB, sgrproj_info[tile_idx].level);
    memcpy(&rsi.sgrproj_info[tile_idx], &sgrproj_info[tile_idx],
           sizeof(sgrproj_info[tile_idx]));
    if (sgrproj_info[tile_idx].level) {
      bits += (SGRPROJ_BITS << AV1_PROB_COST_SHIFT);
    }
  }
340
  err = try_restoration_frame(src, cpi, &rsi, 1, partial_frame, dst_frame);
341
342
343
344
345
346
347
348
  cost_sgrproj = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);

  aom_free(rsi.sgrproj_info);

  aom_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
  return cost_sgrproj;
}

349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
static int64_t compute_sse(uint8_t *dgd, int width, int height, int dgd_stride,
                           uint8_t *src, int src_stride) {
  int64_t sse = 0;
  int i, j;
  for (i = 0; i < height; ++i) {
    for (j = 0; j < width; ++j) {
      const int diff =
          (int)dgd[i * dgd_stride + j] - (int)src[i * src_stride + j];
      sse += diff * diff;
    }
  }
  return sse;
}

#if CONFIG_AOM_HIGHBITDEPTH
static int64_t compute_sse_highbd(uint16_t *dgd, int width, int height,
                                  int dgd_stride, uint16_t *src,
                                  int src_stride) {
  int64_t sse = 0;
  int i, j;
  for (i = 0; i < height; ++i) {
    for (j = 0; j < width; ++j) {
      const int diff =
          (int)dgd[i * dgd_stride + j] - (int)src[i * src_stride + j];
      sse += diff * diff;
    }
  }
  return sse;
}
#endif  // CONFIG_AOM_HIGHBITDEPTH

static void search_domaintxfmrf_restoration(uint8_t *dgd8, int width,
                                            int height, int dgd_stride,
                                            uint8_t *src8, int src_stride,
                                            int bit_depth, int *sigma_r) {
  const int first_p_step = 8;
  const int second_p_range = first_p_step >> 1;
  const int second_p_step = 2;
  const int third_p_range = second_p_step >> 1;
  const int third_p_step = 1;
389
  int p, best_p0, best_p = -1;
390
391
392
  int64_t best_sse = INT64_MAX, sse;
  if (bit_depth == 8) {
    uint8_t *tmp = (uint8_t *)aom_malloc(width * height * sizeof(*tmp));
393
    int32_t *tmpbuf = (int32_t *)aom_malloc(DOMAINTXFMRF_TMPBUF_SIZE);
394
395
396
397
    uint8_t *dgd = dgd8;
    uint8_t *src = src8;
    // First phase
    for (p = first_p_step / 2; p < DOMAINTXFMRF_PARAMS; p += first_p_step) {
398
      av1_domaintxfmrf_restoration(dgd, width, height, dgd_stride, p, tmp,
399
                                   width, tmpbuf);
400
401
402
403
404
405
406
407
408
409
410
      sse = compute_sse(tmp, width, height, width, src, src_stride);
      if (sse < best_sse || best_p == -1) {
        best_p = p;
        best_sse = sse;
      }
    }
    // Second Phase
    best_p0 = best_p;
    for (p = best_p0 - second_p_range; p <= best_p0 + second_p_range;
         p += second_p_step) {
      if (p < 0 || p == best_p || p >= DOMAINTXFMRF_PARAMS) continue;
411
      av1_domaintxfmrf_restoration(dgd, width, height, dgd_stride, p, tmp,
412
                                   width, tmpbuf);
413
414
415
416
417
418
419
420
421
422
423
      sse = compute_sse(tmp, width, height, width, src, src_stride);
      if (sse < best_sse) {
        best_p = p;
        best_sse = sse;
      }
    }
    // Third Phase
    best_p0 = best_p;
    for (p = best_p0 - third_p_range; p <= best_p0 + third_p_range;
         p += third_p_step) {
      if (p < 0 || p == best_p || p >= DOMAINTXFMRF_PARAMS) continue;
424
      av1_domaintxfmrf_restoration(dgd, width, height, dgd_stride, p, tmp,
425
                                   width, tmpbuf);
426
427
428
429
430
431
432
      sse = compute_sse(tmp, width, height, width, src, src_stride);
      if (sse < best_sse) {
        best_p = p;
        best_sse = sse;
      }
    }
    aom_free(tmp);
433
    aom_free(tmpbuf);
434
435
436
  } else {
#if CONFIG_AOM_HIGHBITDEPTH
    uint16_t *tmp = (uint16_t *)aom_malloc(width * height * sizeof(*tmp));
437
    int32_t *tmpbuf = (int32_t *)aom_malloc(DOMAINTXFMRF_TMPBUF_SIZE);
438
439
440
441
    uint16_t *dgd = CONVERT_TO_SHORTPTR(dgd8);
    uint16_t *src = CONVERT_TO_SHORTPTR(src8);
    // First phase
    for (p = first_p_step / 2; p < DOMAINTXFMRF_PARAMS; p += first_p_step) {
442
      av1_domaintxfmrf_restoration_highbd(dgd, width, height, dgd_stride, p,
443
                                          bit_depth, tmp, width, tmpbuf);
444
445
446
447
448
449
450
451
452
453
454
      sse = compute_sse_highbd(tmp, width, height, width, src, src_stride);
      if (sse < best_sse || best_p == -1) {
        best_p = p;
        best_sse = sse;
      }
    }
    // Second Phase
    best_p0 = best_p;
    for (p = best_p0 - second_p_range; p <= best_p0 + second_p_range;
         p += second_p_step) {
      if (p < 0 || p == best_p || p >= DOMAINTXFMRF_PARAMS) continue;
455
      av1_domaintxfmrf_restoration_highbd(dgd, width, height, dgd_stride, p,
456
                                          bit_depth, tmp, width, tmpbuf);
457
458
459
460
461
462
463
464
465
466
467
      sse = compute_sse_highbd(tmp, width, height, width, src, src_stride);
      if (sse < best_sse) {
        best_p = p;
        best_sse = sse;
      }
    }
    // Third Phase
    best_p0 = best_p;
    for (p = best_p0 - third_p_range; p <= best_p0 + third_p_range;
         p += third_p_step) {
      if (p < 0 || p == best_p || p >= DOMAINTXFMRF_PARAMS) continue;
468
      av1_domaintxfmrf_restoration_highbd(dgd, width, height, dgd_stride, p,
469
                                          bit_depth, tmp, width, tmpbuf);
470
471
472
473
474
475
476
      sse = compute_sse_highbd(tmp, width, height, width, src, src_stride);
      if (sse < best_sse) {
        best_p = p;
        best_sse = sse;
      }
    }
    aom_free(tmp);
477
    aom_free(tmpbuf);
478
479
480
481
482
483
484
485
486
#else
    assert(0);
#endif  // CONFIG_AOM_HIGHBITDEPTH
  }
  *sigma_r = best_p;
}

static double search_domaintxfmrf(const YV12_BUFFER_CONFIG *src, AV1_COMP *cpi,
                                  int filter_level, int partial_frame,
487
488
                                  RestorationInfo *info, double *best_tile_cost,
                                  YV12_BUFFER_CONFIG *dst_frame) {
489
  DomaintxfmrfInfo *domaintxfmrf_info = info->domaintxfmrf_info;
490
491
  double cost_norestore, cost_domaintxfmrf;
  int64_t err;
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
  int bits;
  MACROBLOCK *x = &cpi->td.mb;
  AV1_COMMON *const cm = &cpi->common;
  const YV12_BUFFER_CONFIG *dgd = cm->frame_to_show;
  RestorationInfo rsi;
  int tile_idx, tile_width, tile_height, nhtiles, nvtiles;
  int h_start, h_end, v_start, v_end;
  const int ntiles = av1_get_rest_ntiles(cm->width, cm->height, &tile_width,
                                         &tile_height, &nhtiles, &nvtiles);
  //  Make a copy of the unfiltered / processed recon buffer
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
  av1_loop_filter_frame(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, filter_level,
                        1, partial_frame);
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_db);

  rsi.frame_restoration_type = RESTORE_DOMAINTXFMRF;
  rsi.domaintxfmrf_info =
      (DomaintxfmrfInfo *)aom_malloc(sizeof(*rsi.domaintxfmrf_info) * ntiles);
  assert(rsi.domaintxfmrf_info != NULL);

  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx)
    rsi.domaintxfmrf_info[tile_idx].level = 0;
  // Compute best Domaintxfm filters for each tile
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
    av1_get_rest_tile_limits(tile_idx, 0, 0, nhtiles, nvtiles, tile_width,
                             tile_height, cm->width, cm->height, 0, 0, &h_start,
                             &h_end, &v_start, &v_end);
519
    err = sse_restoration_tile(src, cm->frame_to_show, cm, h_start,
520
                               h_end - h_start, v_start, v_end - v_start, 1);
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
    // #bits when a tile is not restored
    bits = av1_cost_bit(RESTORE_NONE_DOMAINTXFMRF_PROB, 0);
    cost_norestore = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
    best_tile_cost[tile_idx] = DBL_MAX;

    search_domaintxfmrf_restoration(
        dgd->y_buffer + v_start * dgd->y_stride + h_start, h_end - h_start,
        v_end - v_start, dgd->y_stride,
        src->y_buffer + v_start * src->y_stride + h_start, src->y_stride,
#if CONFIG_AOM_HIGHBITDEPTH
        cm->bit_depth,
#else
        8,
#endif  // CONFIG_AOM_HIGHBITDEPTH
        &rsi.domaintxfmrf_info[tile_idx].sigma_r);

    rsi.domaintxfmrf_info[tile_idx].level = 1;
538
    err = try_restoration_tile(src, cpi, &rsi, 1, partial_frame, tile_idx, 0, 0,
539
                               dst_frame);
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
    bits = DOMAINTXFMRF_PARAMS_BITS << AV1_PROB_COST_SHIFT;
    bits += av1_cost_bit(RESTORE_NONE_DOMAINTXFMRF_PROB, 1);
    cost_domaintxfmrf = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
    if (cost_domaintxfmrf >= cost_norestore) {
      domaintxfmrf_info[tile_idx].level = 0;
    } else {
      memcpy(&domaintxfmrf_info[tile_idx], &rsi.domaintxfmrf_info[tile_idx],
             sizeof(domaintxfmrf_info[tile_idx]));
      bits = DOMAINTXFMRF_PARAMS_BITS << AV1_PROB_COST_SHIFT;
      best_tile_cost[tile_idx] = RDCOST_DBL(
          x->rdmult, x->rddiv,
          (bits + cpi->switchable_restore_cost[RESTORE_DOMAINTXFMRF]) >> 4,
          err);
    }
    rsi.domaintxfmrf_info[tile_idx].level = 0;
  }
  // Cost for Domaintxfmrf filtering
  bits = frame_level_restore_bits[rsi.frame_restoration_type]
         << AV1_PROB_COST_SHIFT;
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
    bits += av1_cost_bit(RESTORE_NONE_DOMAINTXFMRF_PROB,
                         domaintxfmrf_info[tile_idx].level);
    memcpy(&rsi.domaintxfmrf_info[tile_idx], &domaintxfmrf_info[tile_idx],
           sizeof(domaintxfmrf_info[tile_idx]));
    if (domaintxfmrf_info[tile_idx].level) {
      bits += (DOMAINTXFMRF_PARAMS_BITS << AV1_PROB_COST_SHIFT);
    }
  }
568
  err = try_restoration_frame(src, cpi, &rsi, 1, partial_frame, dst_frame);
569
570
571
572
573
574
575
576
  cost_domaintxfmrf = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);

  aom_free(rsi.domaintxfmrf_info);

  aom_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
  return cost_domaintxfmrf;
}

577
578
static double find_average(uint8_t *src, int h_start, int h_end, int v_start,
                           int v_end, int stride) {
579
580
581
  uint64_t sum = 0;
  double avg = 0;
  int i, j;
582
583
584
  for (i = v_start; i < v_end; i++)
    for (j = h_start; j < h_end; j++) sum += src[i * stride + j];
  avg = (double)sum / ((v_end - v_start) * (h_end - h_start));
585
586
587
  return avg;
}

588
589
590
static void compute_stats(uint8_t *dgd, uint8_t *src, int h_start, int h_end,
                          int v_start, int v_end, int dgd_stride,
                          int src_stride, double *M, double *H) {
591
592
  int i, j, k, l;
  double Y[RESTORATION_WIN2];
593
594
  const double avg =
      find_average(dgd, h_start, h_end, v_start, v_end, dgd_stride);
595
596
597

  memset(M, 0, sizeof(*M) * RESTORATION_WIN2);
  memset(H, 0, sizeof(*H) * RESTORATION_WIN2 * RESTORATION_WIN2);
598
599
  for (i = v_start; i < v_end; i++) {
    for (j = h_start; j < h_end; j++) {
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
      const double X = (double)src[i * src_stride + j] - avg;
      int idx = 0;
      for (k = -RESTORATION_HALFWIN; k <= RESTORATION_HALFWIN; k++) {
        for (l = -RESTORATION_HALFWIN; l <= RESTORATION_HALFWIN; l++) {
          Y[idx] = (double)dgd[(i + l) * dgd_stride + (j + k)] - avg;
          idx++;
        }
      }
      for (k = 0; k < RESTORATION_WIN2; ++k) {
        M[k] += Y[k] * X;
        H[k * RESTORATION_WIN2 + k] += Y[k] * Y[k];
        for (l = k + 1; l < RESTORATION_WIN2; ++l) {
          double value = Y[k] * Y[l];
          H[k * RESTORATION_WIN2 + l] += value;
          H[l * RESTORATION_WIN2 + k] += value;
        }
      }
    }
  }
}

Yaowu Xu's avatar
Yaowu Xu committed
621
#if CONFIG_AOM_HIGHBITDEPTH
622
623
static double find_average_highbd(uint16_t *src, int h_start, int h_end,
                                  int v_start, int v_end, int stride) {
624
625
626
  uint64_t sum = 0;
  double avg = 0;
  int i, j;
627
628
629
  for (i = v_start; i < v_end; i++)
    for (j = h_start; j < h_end; j++) sum += src[i * stride + j];
  avg = (double)sum / ((v_end - v_start) * (h_end - h_start));
630
631
632
  return avg;
}

633
634
635
636
static void compute_stats_highbd(uint8_t *dgd8, uint8_t *src8, int h_start,
                                 int h_end, int v_start, int v_end,
                                 int dgd_stride, int src_stride, double *M,
                                 double *H) {
637
638
639
640
  int i, j, k, l;
  double Y[RESTORATION_WIN2];
  uint16_t *src = CONVERT_TO_SHORTPTR(src8);
  uint16_t *dgd = CONVERT_TO_SHORTPTR(dgd8);
641
642
  const double avg =
      find_average_highbd(dgd, h_start, h_end, v_start, v_end, dgd_stride);
643
644
645

  memset(M, 0, sizeof(*M) * RESTORATION_WIN2);
  memset(H, 0, sizeof(*H) * RESTORATION_WIN2 * RESTORATION_WIN2);
646
647
  for (i = v_start; i < v_end; i++) {
    for (j = h_start; j < h_end; j++) {
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
      const double X = (double)src[i * src_stride + j] - avg;
      int idx = 0;
      for (k = -RESTORATION_HALFWIN; k <= RESTORATION_HALFWIN; k++) {
        for (l = -RESTORATION_HALFWIN; l <= RESTORATION_HALFWIN; l++) {
          Y[idx] = (double)dgd[(i + l) * dgd_stride + (j + k)] - avg;
          idx++;
        }
      }
      for (k = 0; k < RESTORATION_WIN2; ++k) {
        M[k] += Y[k] * X;
        H[k * RESTORATION_WIN2 + k] += Y[k] * Y[k];
        for (l = k + 1; l < RESTORATION_WIN2; ++l) {
          double value = Y[k] * Y[l];
          H[k * RESTORATION_WIN2 + l] += value;
          H[l * RESTORATION_WIN2 + k] += value;
        }
      }
    }
  }
}
Yaowu Xu's avatar
Yaowu Xu committed
668
#endif  // CONFIG_AOM_HIGHBITDEPTH
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690

// Solves Ax = b, where x and b are column vectors
static int linsolve(int n, double *A, int stride, double *b, double *x) {
  int i, j, k;
  double c;
  // Partial pivoting
  for (i = n - 1; i > 0; i--) {
    if (A[(i - 1) * stride] < A[i * stride]) {
      for (j = 0; j < n; j++) {
        c = A[i * stride + j];
        A[i * stride + j] = A[(i - 1) * stride + j];
        A[(i - 1) * stride + j] = c;
      }
      c = b[i];
      b[i] = b[i - 1];
      b[i - 1] = c;
    }
  }
  // Forward elimination
  for (k = 0; k < n - 1; k++) {
    for (i = k; i < n - 1; i++) {
      c = A[(i + 1) * stride + k] / A[k * stride + k];
691
      for (j = 0; j < n; j++) A[(i + 1) * stride + j] -= c * A[k * stride + j];
692
693
694
695
696
      b[i + 1] -= c * b[k];
    }
  }
  // Backward substitution
  for (i = n - 1; i >= 0; i--) {
697
    if (fabs(A[i * stride + i]) < 1e-10) return 0;
698
    c = 0;
699
    for (j = i + 1; j <= n - 1; j++) c += A[i * stride + j] * x[j];
700
701
702
703
704
705
706
707
708
709
710
711
712
713
    x[i] = (b[i] - c) / A[i * stride + i];
  }
  return 1;
}

static INLINE int wrap_index(int i) {
  return (i >= RESTORATION_HALFWIN1 ? RESTORATION_WIN - 1 - i : i);
}

// Fix vector b, update vector a
static void update_a_sep_sym(double **Mc, double **Hc, double *a, double *b) {
  int i, j;
  double S[RESTORATION_WIN];
  double A[RESTORATION_WIN], B[RESTORATION_WIN2];
Aamir Anis's avatar
Aamir Anis committed
714
  int w, w2;
715
716
  memset(A, 0, sizeof(A));
  memset(B, 0, sizeof(B));
717
  for (i = 0; i < RESTORATION_WIN; i++) {
718
719
720
721
722
    for (j = 0; j < RESTORATION_WIN; ++j) {
      const int jj = wrap_index(j);
      A[jj] += Mc[i][j] * b[i];
    }
  }
723
724
  for (i = 0; i < RESTORATION_WIN; i++) {
    for (j = 0; j < RESTORATION_WIN; j++) {
725
726
727
728
729
730
      int k, l;
      for (k = 0; k < RESTORATION_WIN; ++k)
        for (l = 0; l < RESTORATION_WIN; ++l) {
          const int kk = wrap_index(k);
          const int ll = wrap_index(l);
          B[ll * RESTORATION_HALFWIN1 + kk] +=
731
732
              Hc[j * RESTORATION_WIN + i][k * RESTORATION_WIN2 + l] * b[i] *
              b[j];
733
734
735
        }
    }
  }
Aamir Anis's avatar
Aamir Anis committed
736
737
738
739
  // Normalization enforcement in the system of equations itself
  w = RESTORATION_WIN;
  w2 = (w >> 1) + 1;
  for (i = 0; i < w2 - 1; ++i)
740
741
    A[i] -=
        A[w2 - 1] * 2 + B[i * w2 + w2 - 1] - 2 * B[(w2 - 1) * w2 + (w2 - 1)];
Aamir Anis's avatar
Aamir Anis committed
742
743
744
745
746
747
748
749
750
  for (i = 0; i < w2 - 1; ++i)
    for (j = 0; j < w2 - 1; ++j)
      B[i * w2 + j] -= 2 * (B[i * w2 + (w2 - 1)] + B[(w2 - 1) * w2 + j] -
                            2 * B[(w2 - 1) * w2 + (w2 - 1)]);
  if (linsolve(w2 - 1, B, w2, A, S)) {
    S[w2 - 1] = 1.0;
    for (i = w2; i < w; ++i) {
      S[i] = S[w - 1 - i];
      S[w2 - 1] -= 2 * S[i];
751
    }
Aamir Anis's avatar
Aamir Anis committed
752
    memcpy(a, S, w * sizeof(*a));
753
754
755
756
757
758
759
760
  }
}

// Fix vector a, update vector b
static void update_b_sep_sym(double **Mc, double **Hc, double *a, double *b) {
  int i, j;
  double S[RESTORATION_WIN];
  double A[RESTORATION_WIN], B[RESTORATION_WIN2];
Aamir Anis's avatar
Aamir Anis committed
761
  int w, w2;
762
763
  memset(A, 0, sizeof(A));
  memset(B, 0, sizeof(B));
764
  for (i = 0; i < RESTORATION_WIN; i++) {
765
    const int ii = wrap_index(i);
766
    for (j = 0; j < RESTORATION_WIN; j++) A[ii] += Mc[i][j] * a[j];
767
768
769
770
771
772
773
774
775
776
  }

  for (i = 0; i < RESTORATION_WIN; i++) {
    for (j = 0; j < RESTORATION_WIN; j++) {
      const int ii = wrap_index(i);
      const int jj = wrap_index(j);
      int k, l;
      for (k = 0; k < RESTORATION_WIN; ++k)
        for (l = 0; l < RESTORATION_WIN; ++l)
          B[jj * RESTORATION_HALFWIN1 + ii] +=
777
778
              Hc[i * RESTORATION_WIN + j][k * RESTORATION_WIN2 + l] * a[k] *
              a[l];
779
780
    }
  }
Aamir Anis's avatar
Aamir Anis committed
781
782
783
784
  // Normalization enforcement in the system of equations itself
  w = RESTORATION_WIN;
  w2 = RESTORATION_HALFWIN1;
  for (i = 0; i < w2 - 1; ++i)
785
786
    A[i] -=
        A[w2 - 1] * 2 + B[i * w2 + w2 - 1] - 2 * B[(w2 - 1) * w2 + (w2 - 1)];
Aamir Anis's avatar
Aamir Anis committed
787
788
789
790
791
792
793
794
795
  for (i = 0; i < w2 - 1; ++i)
    for (j = 0; j < w2 - 1; ++j)
      B[i * w2 + j] -= 2 * (B[i * w2 + (w2 - 1)] + B[(w2 - 1) * w2 + j] -
                            2 * B[(w2 - 1) * w2 + (w2 - 1)]);
  if (linsolve(w2 - 1, B, w2, A, S)) {
    S[w2 - 1] = 1.0;
    for (i = w2; i < w; ++i) {
      S[i] = S[w - 1 - i];
      S[w2 - 1] -= 2 * S[i];
796
    }
Aamir Anis's avatar
Aamir Anis committed
797
    memcpy(b, S, w * sizeof(*b));
798
799
800
  }
}

801
802
static int wiener_decompose_sep_sym(double *M, double *H, double *a,
                                    double *b) {
803
  static const double init_filt[RESTORATION_WIN] = {
804
    0.035623, -0.127154, 0.211436, 0.760190, 0.211436, -0.127154, 0.035623,
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
  };
  int i, j, iter;
  double *Hc[RESTORATION_WIN2];
  double *Mc[RESTORATION_WIN];
  for (i = 0; i < RESTORATION_WIN; i++) {
    Mc[i] = M + i * RESTORATION_WIN;
    for (j = 0; j < RESTORATION_WIN; j++) {
      Hc[i * RESTORATION_WIN + j] =
          H + i * RESTORATION_WIN * RESTORATION_WIN2 + j * RESTORATION_WIN;
    }
  }
  memcpy(a, init_filt, sizeof(*a) * RESTORATION_WIN);
  memcpy(b, init_filt, sizeof(*b) * RESTORATION_WIN);

  iter = 1;
  while (iter < 10) {
    update_a_sep_sym(Mc, Hc, a, b);
    update_b_sep_sym(Mc, Hc, a, b);
    iter++;
  }
825
  return 1;
826
827
}

Aamir Anis's avatar
Aamir Anis committed
828
829
830
// Computes the function x'*A*x - x'*b for the learned filters, and compares
// against identity filters; Final score is defined as the difference between
// the function values
831
static double compute_score(double *M, double *H, int *vfilt, int *hfilt) {
Aamir Anis's avatar
Aamir Anis committed
832
833
834
835
836
837
838
839
840
841
  double ab[RESTORATION_WIN * RESTORATION_WIN];
  int i, k, l;
  double P = 0, Q = 0;
  double iP = 0, iQ = 0;
  double Score, iScore;
  int w;
  double a[RESTORATION_WIN], b[RESTORATION_WIN];
  w = RESTORATION_WIN;
  a[RESTORATION_HALFWIN] = b[RESTORATION_HALFWIN] = 1.0;
  for (i = 0; i < RESTORATION_HALFWIN; ++i) {
842
843
844
845
    a[i] = a[RESTORATION_WIN - i - 1] =
        (double)vfilt[i] / RESTORATION_FILT_STEP;
    b[i] = b[RESTORATION_WIN - i - 1] =
        (double)hfilt[i] / RESTORATION_FILT_STEP;
Aamir Anis's avatar
Aamir Anis committed
846
847
848
849
    a[RESTORATION_HALFWIN] -= 2 * a[i];
    b[RESTORATION_HALFWIN] -= 2 * b[i];
  }
  for (k = 0; k < w; ++k) {
850
    for (l = 0; l < w; ++l) ab[k * w + l] = a[l] * b[k];
Aamir Anis's avatar
Aamir Anis committed
851
852
853
  }
  for (k = 0; k < w * w; ++k) {
    P += ab[k] * M[k];
854
    for (l = 0; l < w * w; ++l) Q += ab[k] * H[k * w * w + l] * ab[l];
Aamir Anis's avatar
Aamir Anis committed
855
856
857
858
859
860
861
862
863
864
  }
  Score = Q - 2 * P;

  iP = M[(w * w) >> 1];
  iQ = H[((w * w) >> 1) * w * w + ((w * w) >> 1)];
  iScore = iQ - 2 * iP;

  return Score - iScore;
}

865
866
867
868
869
870
871
872
873
874
875
static void quantize_sym_filter(double *f, int *fi) {
  int i;
  for (i = 0; i < RESTORATION_HALFWIN; ++i) {
    fi[i] = RINT(f[i] * RESTORATION_FILT_STEP);
  }
  // Specialize for 7-tap filter
  fi[0] = CLIP(fi[0], WIENER_FILT_TAP0_MINV, WIENER_FILT_TAP0_MAXV);
  fi[1] = CLIP(fi[1], WIENER_FILT_TAP1_MINV, WIENER_FILT_TAP1_MAXV);
  fi[2] = CLIP(fi[2], WIENER_FILT_TAP2_MINV, WIENER_FILT_TAP2_MAXV);
}

876
877
static double search_wiener(const YV12_BUFFER_CONFIG *src, AV1_COMP *cpi,
                            int filter_level, int partial_frame,
878
879
                            RestorationInfo *info, double *best_tile_cost,
                            YV12_BUFFER_CONFIG *dst_frame) {
880
  WienerInfo *wiener_info = info->wiener_info;
Yaowu Xu's avatar
Yaowu Xu committed
881
  AV1_COMMON *const cm = &cpi->common;
882
  RestorationInfo rsi;
883
884
  int64_t err;
  int bits;
885
  double cost_wiener, cost_norestore;
886
887
888
889
890
891
892
893
894
  MACROBLOCK *x = &cpi->td.mb;
  double M[RESTORATION_WIN2];
  double H[RESTORATION_WIN2 * RESTORATION_WIN2];
  double vfilterd[RESTORATION_WIN], hfilterd[RESTORATION_WIN];
  const YV12_BUFFER_CONFIG *dgd = cm->frame_to_show;
  const int width = cm->width;
  const int height = cm->height;
  const int src_stride = src->y_stride;
  const int dgd_stride = dgd->y_stride;
Aamir Anis's avatar
Aamir Anis committed
895
  double score;
896
  int tile_idx, tile_width, tile_height, nhtiles, nvtiles;
897
  int h_start, h_end, v_start, v_end;
898
  int i;
899

900
901
  const int ntiles = av1_get_rest_ntiles(width, height, &tile_width,
                                         &tile_height, &nhtiles, &nvtiles);
902
903
904
905
906
907
  assert(width == dgd->y_crop_width);
  assert(height == dgd->y_crop_height);
  assert(width == src->y_crop_width);
  assert(height == src->y_crop_height);

  //  Make a copy of the unfiltered / processed recon buffer
Yaowu Xu's avatar
Yaowu Xu committed
908
909
910
911
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
  av1_loop_filter_frame(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, filter_level,
                        1, partial_frame);
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_db);
912

913
  rsi.frame_restoration_type = RESTORE_WIENER;
914
915
916
  rsi.wiener_info = (WienerInfo *)aom_malloc(sizeof(*rsi.wiener_info) * ntiles);
  assert(rsi.wiener_info != NULL);

917
918
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx)
    rsi.wiener_info[tile_idx].level = 0;
919
920
921

  // Compute best Wiener filters for each tile
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
922
923
924
    av1_get_rest_tile_limits(tile_idx, 0, 0, nhtiles, nvtiles, tile_width,
                             tile_height, width, height, 0, 0, &h_start, &h_end,
                             &v_start, &v_end);
925
    err = sse_restoration_tile(src, cm->frame_to_show, cm, h_start,
926
                               h_end - h_start, v_start, v_end - v_start, 1);
927
928
    // #bits when a tile is not restored
    bits = av1_cost_bit(RESTORE_NONE_WIENER_PROB, 0);
929
    cost_norestore = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
930
    best_tile_cost[tile_idx] = DBL_MAX;
931
932
933
934

    av1_get_rest_tile_limits(tile_idx, 0, 0, nhtiles, nvtiles, tile_width,
                             tile_height, width, height, 1, 1, &h_start, &h_end,
                             &v_start, &v_end);
Yaowu Xu's avatar
Yaowu Xu committed
935
#if CONFIG_AOM_HIGHBITDEPTH
936
937
938
939
    if (cm->use_highbitdepth)
      compute_stats_highbd(dgd->y_buffer, src->y_buffer, h_start, h_end,
                           v_start, v_end, dgd_stride, src_stride, M, H);
    else
Yaowu Xu's avatar
Yaowu Xu committed
940
#endif  // CONFIG_AOM_HIGHBITDEPTH
941
942
943
      compute_stats(dgd->y_buffer, src->y_buffer, h_start, h_end, v_start,
                    v_end, dgd_stride, src_stride, M, H);

944
    wiener_info[tile_idx].level = 1;
945
    if (!wiener_decompose_sep_sym(M, H, vfilterd, hfilterd)) {
946
      wiener_info[tile_idx].level = 0;
947
948
      continue;
    }
949
950
    quantize_sym_filter(vfilterd, rsi.wiener_info[tile_idx].vfilter);
    quantize_sym_filter(hfilterd, rsi.wiener_info[tile_idx].hfilter);
951
952
953
954

    // Filter score computes the value of the function x'*A*x - x'*b for the
    // learned filter and compares it against identity filer. If there is no
    // reduction in the function, the filter is reverted back to identity
955
956
    score = compute_score(M, H, rsi.wiener_info[tile_idx].vfilter,
                          rsi.wiener_info[tile_idx].hfilter);
957
    if (score > 0.0) {
958
      wiener_info[tile_idx].level = 0;
959
960
      continue;
    }
961

962
    rsi.wiener_info[tile_idx].level = 1;
963
    err = try_restoration_tile(src, cpi, &rsi, 1, partial_frame, tile_idx, 0, 0,
964
                               dst_frame);
965
966
967
    bits = WIENER_FILT_BITS << AV1_PROB_COST_SHIFT;
    bits += av1_cost_bit(RESTORE_NONE_WIENER_PROB, 1);
    cost_wiener = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
968
    if (cost_wiener >= cost_norestore) {
969
970
971
972
973
974
975
      wiener_info[tile_idx].level = 0;
    } else {
      wiener_info[tile_idx].level = 1;
      for (i = 0; i < RESTORATION_HALFWIN; ++i) {
        wiener_info[tile_idx].vfilter[i] = rsi.wiener_info[tile_idx].vfilter[i];
        wiener_info[tile_idx].hfilter[i] = rsi.wiener_info[tile_idx].hfilter[i];
      }
976
977
978
979
980
      bits = WIENER_FILT_BITS << AV1_PROB_COST_SHIFT;
      best_tile_cost[tile_idx] = RDCOST_DBL(
          x->rdmult, x->rddiv,
          (bits + cpi->switchable_restore_cost[RESTORE_WIENER]) >> 4, err);
    }
981
    rsi.wiener_info[tile_idx].level = 0;
982
  }
983
  // Cost for Wiener filtering
984
985
  bits = frame_level_restore_bits[rsi.frame_restoration_type]
         << AV1_PROB_COST_SHIFT;
986
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
987
988
989
    bits += av1_cost_bit(RESTORE_NONE_WIENER_PROB, wiener_info[tile_idx].level);
    rsi.wiener_info[tile_idx].level = wiener_info[tile_idx].level;
    if (wiener_info[tile_idx].level) {
990
      bits += (WIENER_FILT_BITS << AV1_PROB_COST_SHIFT);
991
992
993
994
995
      for (i = 0; i < RESTORATION_HALFWIN; ++i) {
        rsi.wiener_info[tile_idx].vfilter[i] = wiener_info[tile_idx].vfilter[i];
        rsi.wiener_info[tile_idx].hfilter[i] = wiener_info[tile_idx].hfilter[i];
      }
    }
Aamir Anis's avatar
Aamir Anis committed
996
  }
997
  err = try_restoration_frame(src, cpi, &rsi, 1, partial_frame, dst_frame);
998
  cost_wiener = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
999

1000
  aom_free(rsi.wiener_info);
1001

Yaowu Xu's avatar
Yaowu Xu committed
1002
  aom_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
1003
  return cost_wiener;
1004
1005
}

1006
1007
static double search_norestore(const YV12_BUFFER_CONFIG *src, AV1_COMP *cpi,
                               int filter_level, int partial_frame,
1008
1009
                               RestorationInfo *info, double *best_tile_cost,
                               YV12_BUFFER_CONFIG *dst_frame) {
1010
1011
  double err, cost_norestore;
  int bits;
1012
  MACROBLOCK *x = &cpi->td.mb;
1013
1014
  AV1_COMMON *const cm = &cpi->common;
  int tile_idx, tile_width, tile_height, nhtiles, nvtiles;
1015
1016
1017
  int h_start, h_end, v_start, v_end;
  const int ntiles = av1_get_rest_ntiles(cm->width, cm->height, &tile_width,
                                         &tile_height, &nhtiles, &nvtiles);
1018
  (void)info;
1019
  (void)dst_frame;
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030

  //  Make a copy of the unfiltered / processed recon buffer
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
  av1_loop_filter_frame(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, filter_level,
                        1, partial_frame);
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_db);

  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
    av1_get_rest_tile_limits(tile_idx, 0, 0, nhtiles, nvtiles, tile_width,
                             tile_height, cm->width, cm->height, 0, 0, &h_start,
                             &h_end, &v_start, &v_end);
1031
    err = sse_restoration_tile(src, cm->frame_to_show, cm, h_start,
1032
                               h_end - h_start, v_start, v_end - v_start, 1);
1033
    best_tile_cost[tile_idx] =
1034
1035
        RDCOST_DBL(x->rdmult, x->rddiv,
                   (cpi->switchable_restore_cost[RESTORE_NONE] >> 4), err);
1036
1037
  }
  // RD cost associated with no restoration
1038
  err = sse_restoration_tile(src, cm->frame_to_show, cm, 0, cm->width, 0,
1039
                             cm->height, 1);
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
  bits = frame_level_restore_bits[RESTORE_NONE] << AV1_PROB_COST_SHIFT;
  cost_norestore = RDCOST_DBL(x->rdmult, x->rddiv, (bits >> 4), err);
  aom_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
  return cost_norestore;
}

static double search_switchable_restoration(
    AV1_COMP *cpi, int filter_level, int partial_frame, RestorationInfo *rsi,
    double *tile_cost[RESTORE_SWITCHABLE_TYPES]) {
  AV1_COMMON *const cm = &cpi->common;
  MACROBLOCK *x = &cpi->td.mb;
  double cost_switchable = 0;
  int r, bits, tile_idx;
  const int ntiles =
      av1_get_rest_ntiles(cm->width, cm->height, NULL, NULL, NULL, NULL);

  //  Make a copy of the unfiltered / processed recon buffer
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_uf);
  av1_loop_filter_frame(cm->frame_to_show, cm, &cpi->td.mb.e_mbd, filter_level,
                        1, partial_frame);
  aom_yv12_copy_y(cm->frame_to_show, &cpi->last_frame_db);

  rsi->frame_restoration_type = RESTORE_SWITCHABLE;
  bits = frame_level_restore_bits[rsi->frame_restoration_type]
         << AV1_PROB_COST_SHIFT;
  cost_switchable = RDCOST_DBL(x->rdmult, x->rddiv, bits >> 4, 0);
  for (tile_idx = 0; tile_idx < ntiles; ++tile_idx) {
    double best_cost = tile_cost[RESTORE_NONE][tile_idx];
    rsi->restoration_type[tile_idx] = RESTORE_NONE;
    for (r = 1; r < RESTORE_SWITCHABLE_TYPES; r++) {
      if (tile_cost[r][tile_idx] < best_cost) {
        rsi->restoration_type[tile_idx] = r;
        best_cost = tile_cost[r][tile_idx];
1073
1074
      }
    }
1075
    cost_switchable += best_cost;
1076
1077
  }
  aom_yv12_copy_y(&cpi->last_frame_uf, cm->frame_to_show);
1078
  return cost_switchable;
1079
1080
1081
}

void av1_pick_filter_restoration(const YV12_BUFFER_CONFIG *src, AV1_COMP *cpi,
Yaowu Xu's avatar
Yaowu Xu committed
1082
                                 LPF_PICK_METHOD method) {
1083
  static search_restore_type search_restore_fun[RESTORE_SWITCHABLE_TYPES] = {
1084
    search_norestore, search_wiener, search_sgrproj, search_domaintxfmrf,
1085
  };
Yaowu Xu's avatar
Yaowu Xu committed
1086
  AV1_COMMON *const cm = &cpi->common;
1087
  struct loopfilter *const lf = &cm->lf;
1088
1089
1090
1091
  double cost_restore[RESTORE_TYPES];
  double *tile_cost[RESTORE_SWITCHABLE_TYPES];
  double best_cost_restore;
  RestorationType r, best_restore;
1092
  YV12_BUFFER_CONFIG dst_frame;
1093

1094
1095
  const int ntiles =
      av1_get_rest_ntiles(cm->width, cm->height, NULL, NULL, NULL, NULL);
1096
1097
1098

  for (r = 0; r < RESTORE_SWITCHABLE_TYPES; r++)
    tile_cost[r] = (double *)aom_malloc(sizeof(*tile_cost[0]) * ntiles);
1099

1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
  memset(&dst_frame, 0, sizeof(YV12_BUFFER_CONFIG));
  if (aom_realloc_frame_buffer(&dst_frame, cm->width, cm->height,
                               cm->subsampling_x, cm->subsampling_y,
#if CONFIG_AOM_HIGHBITDEPTH
                               cm->use_highbitdepth,
#endif
                               AOM_BORDER_IN_PIXELS, cm->byte_alignment, NULL,
                               NULL, NULL) < 0)
    aom_internal_error(&cm->error, AOM_CODEC_MEM_ERROR,
                       "Failed to allocate restoration dst buffer");

1111
  lf->sharpness_level = cm->frame_type == KEY_FRAME ? 0 : cpi->oxcf.sharpness;
1112
1113

  if (method == LPF_PICK_MINIMAL_LPF && lf->filter_level) {
1114
    lf->filter_level = 0;
1115
    cm->rst_info.frame_restoration_type = RESTORE_NONE;
1116
1117
  } else if (method >= LPF_PICK_FROM_Q) {
    const int min_filter_level = 0;
Yaowu Xu's avatar
Yaowu Xu committed
1118
1119
    const int max_filter_level = av1_get_max_filter_level(cpi);
    const int q = av1_ac_quant(cm->base_qindex, 0, cm->bit_depth);
1120
1121
// These values were determined by linear fitting the result of the
// searched level, filt_guess = q * 0.316206 + 3.87252
Yaowu Xu's avatar
Yaowu Xu committed
1122
#if CONFIG_AOM_HIGHBITDEPTH
1123
1124
    int filt_guess;
    switch (cm->bit_depth) {
Yaowu Xu's avatar
Yaowu Xu committed
1125
      case AOM_BITS_8:
1126
1127
        filt_guess = ROUND_POWER_OF_TWO(q * 20723 + 1015158, 18);
        break;
Yaowu Xu's avatar
Yaowu Xu committed
1128
      case AOM_BITS_10:
1129
1130
        filt_guess = ROUND_POWER_OF_TWO(q * 20723 + 4060632, 20);
        break;
Yaowu Xu's avatar
Yaowu Xu committed
1131
      case AOM_BITS_12:
1132
1133
1134
        filt_guess = ROUND_POWER_OF_TWO(q * 20723 + 16242526, 22);
        break;
      default:
1135
        assert(0 &&
Yaowu Xu's avatar
Yaowu Xu committed
1136
1137
               "bit_depth should be AOM_BITS_8, AOM_BITS_10 "
               "or AOM_BITS_12");
1138
1139
1140
1141
        return;
    }
#else
    int filt_guess = ROUND_POWER_OF_TWO(q * 20723 + 1015158, 18);
Yaowu Xu's avatar
Yaowu Xu committed
1142
#endif  // CONFIG_AOM_HIGHBITDEPTH
1143
    if (cm->frame_type == KEY_FRAME) filt_guess -= 4;
1144
1145
    lf->filter_level = clamp(filt_guess, min_filter_level, max_filter_level);
  } else {
1146
1147
1148
1149
1150
    lf->filter_level =
        av1_search_filter_level(src, cpi, method == LPF_PICK_FROM_SUBIMAGE,
                                &cost_restore[RESTORE_NONE]);
  }
  for (r = 0; r < RESTORE_SWITCHABLE_TYPES; ++r) {
1151
1152
1153
    cost_restore[r] = search_restore_fun[r](
        src, cpi, lf->filter_level, method == LPF_PICK_FROM_SUBIMAGE,
        &cm->rst_info, tile_cost[r], &dst_frame);
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
  }
  cost_restore[RESTORE_SWITCHABLE] = search_switchable_restoration(
      cpi, lf->filter_level, method == LPF_PICK_FROM_SUBIMAGE, &cm->rst_info,
      tile_cost);

  best_cost_restore = DBL_MAX;
  best_restore = 0;
  for (r = 0; r < RESTORE_TYPES; ++r) {
    if (cost_restore[r] < best_cost_restore) {
      best_restore = r;
      best_cost_restore = cost_restore[r];
    }
1166
  }
1167
1168
  cm->rst_info.frame_restoration_type = best_restore;
  /*
1169
  printf("Frame %d/%d frame_restore_type %d : %f %f %f %f %f\n",
1170
         cm->current_video_frame, cm->show_frame,
1171
         cm->rst_info.frame_restoration_type, cost_restore[0], cost_restore[1],
1172
         cost_restore[2], cost_restore[3], cost_restore[4]);
1173
1174
         */
  for (r = 0; r < RESTORE_SWITCHABLE_TYPES; r++) aom_free(tile_cost[r]);
1175
  aom_free_frame_buffer(&dst_frame);
1176
}