vp9_denoiser.c 5.83 KB
Newer Older
Tim Kopp's avatar
Tim Kopp committed
1
2
3
4
5
6
7
8
9
10
/*
 *  Copyright (c) 2012 The WebM project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

Tim Kopp's avatar
Tim Kopp committed
11
#include <assert.h>
Tim Kopp's avatar
Tim Kopp committed
12
#include "vpx_scale/yv12config.h"
Tim Kopp's avatar
Tim Kopp committed
13
14
#include "vpx/vpx_integer.h"
#include "vp9/encoder/vp9_denoiser.h"
Tim Kopp's avatar
Tim Kopp committed
15
16
17
18
19
20
21
22

static const int widths[]  = {4, 4, 8, 8,  8, 16, 16, 16, 32, 32, 32, 64, 64};
static const int heights[] = {4, 8, 4, 8, 16,  8, 16, 32, 16, 32, 64, 32, 64};

int vp9_denoiser_filter() {
  return 0;
}

Tim Kopp's avatar
Tim Kopp committed
23
24
25
26
static int update_running_avg(const uint8_t *mc_avg, int mc_avg_stride,
                              uint8_t *avg, int avg_stride,
                              const uint8_t *sig, int sig_stride,
                              int increase_denoising, BLOCK_SIZE bs) {
Tim Kopp's avatar
Tim Kopp committed
27
  int r, c;
28
29
30
  int diff, adj, absdiff;
  int shift_inc1 = 0, shift_inc2 = 1;
  int adj_val[] = {3, 4, 6};
Tim Kopp's avatar
Tim Kopp committed
31
32
  int total_adj = 0;

33
34
35
36
37
  if (increase_denoising) {
    shift_inc1 = 1;
    shift_inc2 = 2;
  }

Tim Kopp's avatar
Tim Kopp committed
38
39
40
  for (r = 0; r < heights[bs]; ++r) {
    for (c = 0; c < widths[bs]; ++c) {
      diff = mc_avg[c] - sig[c];
41
      absdiff = abs(diff);
Tim Kopp's avatar
Tim Kopp committed
42

43
44
45
      if (absdiff <= 3 + shift_inc1) {
        avg[c] = mc_avg[c];
        total_adj += diff;
Tim Kopp's avatar
Tim Kopp committed
46
      } else {
47
48
49
        switch (absdiff) {
          case 4: case 5: case 6: case 7:
            adj = adj_val[0];
Tim Kopp's avatar
Tim Kopp committed
50
            break;
51
52
53
          case 8: case 9: case 10: case 11:
          case 12: case 13: case 14: case 15:
            adj = adj_val[1];
Tim Kopp's avatar
Tim Kopp committed
54
            break;
55
56
57
58
59
60
61
62
63
64
          default:
            adj = adj_val[2];
        }
        if (diff > 0) {
          avg[c] = MIN(UINT8_MAX, sig[c] + adj);
          total_adj += adj;
        } else {
          avg[c] = MAX(0, sig[c] - adj);
          total_adj -= adj;
        }
Tim Kopp's avatar
Tim Kopp committed
65
66
67
68
69
70
71
72
73
      }
    }
    sig += sig_stride;
    avg += avg_stride;
    mc_avg += mc_avg_stride;
  }
  return total_adj;
}

Tim Kopp's avatar
Tim Kopp committed
74
75
static uint8_t *block_start(uint8_t *framebuf, int stride,
                            int mi_row, int mi_col) {
76
  return framebuf + (stride * mi_row * 8) + (mi_col * 8);
77
78
79
80
81
82
83
84
85
86
87
88
89
90
}

void copy_block(uint8_t *dest, int dest_stride,
                uint8_t *src, int src_stride, BLOCK_SIZE bs) {
  int r, c;
  for (r = 0; r < heights[bs]; ++r) {
    for (c = 0; c < widths[bs]; ++c) {
      dest[c] = src[c];
    }
    dest += dest_stride;
    src += src_stride;
  }
}

91
void vp9_denoiser_denoise(VP9_DENOISER *denoiser, MACROBLOCK *mb,
Tim Kopp's avatar
Tim Kopp committed
92
                          int mi_row, int mi_col, BLOCK_SIZE bs) {
93
94
95
  int decision = COPY_BLOCK;

  YV12_BUFFER_CONFIG avg = denoiser->running_avg_y[INTRA_FRAME];
Tim Kopp's avatar
Tim Kopp committed
96
97
98
99
  YV12_BUFFER_CONFIG mc_avg = denoiser->mc_running_avg_y;
  uint8_t *avg_start = block_start(avg.y_buffer, avg.y_stride, mi_row, mi_col);
  uint8_t *mc_avg_start = block_start(mc_avg.y_buffer, mc_avg.y_stride,
                                          mi_row, mi_col);
100
101
  struct buf_2d src = mb->plane[0].src;

Tim Kopp's avatar
Tim Kopp committed
102
103

  update_running_avg(mc_avg_start, mc_avg.y_stride, avg_start, avg.y_stride,
104
                     mb->plane[0].src.buf, mb->plane[0].src.stride, 0, bs);
105
106

  if (decision == FILTER_BLOCK) {
Tim Kopp's avatar
Tim Kopp committed
107
    // TODO(tkopp)
108
109
  }
  if (decision == COPY_BLOCK) {
Tim Kopp's avatar
Tim Kopp committed
110
    copy_block(avg_start, avg.y_stride, src.buf, src.stride, bs);
111
  }
Tim Kopp's avatar
Tim Kopp committed
112
113
}

Tim Kopp's avatar
Tim Kopp committed
114
static void copy_frame(YV12_BUFFER_CONFIG dest, const YV12_BUFFER_CONFIG src) {
115
  int r, c;
Tim Kopp's avatar
Tim Kopp committed
116
  const uint8_t *srcbuf = src.y_buffer;
117
118
119
120
121
122
123
124
125
126
127
  uint8_t *destbuf = dest.y_buffer;
  assert(dest.y_width == src.y_width);
  assert(dest.y_height == src.y_height);

  for (r = 0; r < dest.y_height; ++r) {
    for (c = 0; c < dest.y_width; ++c) {
      destbuf[c] = srcbuf[c];
    }
    destbuf += dest.y_stride;
    srcbuf += src.y_stride;
  }
128
129
}

Tim Kopp's avatar
Tim Kopp committed
130
void vp9_denoiser_update_frame_info(VP9_DENOISER *denoiser,
131
                                    YV12_BUFFER_CONFIG src,
Tim Kopp's avatar
Tim Kopp committed
132
133
134
135
                                    FRAME_TYPE frame_type,
                                    int refresh_alt_ref_frame,
                                    int refresh_golden_frame,
                                    int refresh_last_frame) {
136
  if (frame_type == KEY_FRAME) {
Tim Kopp's avatar
Tim Kopp committed
137
    int i;
138
139
140
141
142
    copy_frame(denoiser->running_avg_y[LAST_FRAME], src);
    for (i = 2; i < MAX_REF_FRAMES - 1; i++) {
      copy_frame(denoiser->running_avg_y[i],
                 denoiser->running_avg_y[LAST_FRAME]);
    }
Tim Kopp's avatar
Tim Kopp committed
143
  } else {  /* For non key frames */
144
145
146
147
148
149
150
151
152
153
154
155
156
    if (refresh_alt_ref_frame) {
      copy_frame(denoiser->running_avg_y[ALTREF_FRAME],
                 denoiser->running_avg_y[INTRA_FRAME]);
    }
    if (refresh_golden_frame) {
      copy_frame(denoiser->running_avg_y[GOLDEN_FRAME],
                 denoiser->running_avg_y[INTRA_FRAME]);
    }
    if (refresh_last_frame) {
      copy_frame(denoiser->running_avg_y[LAST_FRAME],
                 denoiser->running_avg_y[INTRA_FRAME]);
    }
  }
Tim Kopp's avatar
Tim Kopp committed
157
158
159
160
161
162
}

void vp9_denoiser_update_frame_stats() {
}

int vp9_denoiser_alloc(VP9_DENOISER *denoiser, int width, int height,
163
164
                       int ssx, int ssy, int border) {
  int i, fail;
Tim Kopp's avatar
Tim Kopp committed
165
  assert(denoiser != NULL);
166

167
168
  for (i = 0; i < MAX_REF_FRAMES; ++i) {
    fail = vp9_alloc_frame_buffer(&denoiser->running_avg_y[i], width, height,
Tim Kopp's avatar
Tim Kopp committed
169
                                  ssx, ssy, border);
170
171
172
173
    if (fail) {
      vp9_denoiser_free(denoiser);
      return 1;
    }
174
175
  }

176
  fail = vp9_alloc_frame_buffer(&denoiser->mc_running_avg_y, width, height,
Tim Kopp's avatar
Tim Kopp committed
177
                                ssx, ssy, border);
178
  if (fail) {
179
180
181
182
    vp9_denoiser_free(denoiser);
    return 1;
  }

Tim Kopp's avatar
Tim Kopp committed
183
184
185
186
  return 0;
}

void vp9_denoiser_free(VP9_DENOISER *denoiser) {
187
  int i;
Tim Kopp's avatar
Tim Kopp committed
188
189
190
  if (denoiser == NULL) {
    return;
  }
191
192
193
194
  for (i = 0; i < MAX_REF_FRAMES; ++i) {
    if (&denoiser->running_avg_y[i] != NULL) {
      vp9_free_frame_buffer(&denoiser->running_avg_y[i]);
    }
195
  }
196
197
  if (&denoiser->mc_running_avg_y != NULL) {
    vp9_free_frame_buffer(&denoiser->mc_running_avg_y);
198
  }
Tim Kopp's avatar
Tim Kopp committed
199
}