DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (d38398e5144e)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275
/*
 *  Copyright (c) 2010 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.
 *
 *  This code was originally written by: Gregory Maxwell, at the Daala
 *  project.
 */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>

#include "./vpx_config.h"
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/ssim.h"
#include "vpx_ports/system_state.h"
#include "vpx_dsp/psnr.h"

#if !defined(M_PI)
#define M_PI (3.141592653589793238462643)
#endif
#include <string.h>

static void od_bin_fdct8x8(tran_low_t *y, int ystride, const int16_t *x,
                           int xstride) {
  int i, j;
  (void)xstride;
  vpx_fdct8x8(x, y, ystride);
  for (i = 0; i < 8; i++)
    for (j = 0; j < 8; j++)
      *(y + ystride * i + j) = (*(y + ystride * i + j) + 4) >> 3;
}
#if CONFIG_VP9_HIGHBITDEPTH
static void hbd_od_bin_fdct8x8(tran_low_t *y, int ystride, const int16_t *x,
                               int xstride) {
  int i, j;
  (void)xstride;
  vpx_highbd_fdct8x8(x, y, ystride);
  for (i = 0; i < 8; i++)
    for (j = 0; j < 8; j++)
      *(y + ystride * i + j) = (*(y + ystride * i + j) + 4) >> 3;
}
#endif

/* Normalized inverse quantization matrix for 8x8 DCT at the point of
 * transparency. This is not the JPEG based matrix from the paper,
 this one gives a slightly higher MOS agreement.*/
static const double csf_y[8][8] = {
  { 1.6193873005, 2.2901594831, 2.08509755623, 1.48366094411, 1.00227514334,
    0.678296995242, 0.466224900598, 0.3265091542 },
  { 2.2901594831, 1.94321815382, 2.04793073064, 1.68731108984, 1.2305666963,
    0.868920337363, 0.61280991668, 0.436405793551 },
  { 2.08509755623, 2.04793073064, 1.34329019223, 1.09205635862, 0.875748795257,
    0.670882927016, 0.501731932449, 0.372504254596 },
  { 1.48366094411, 1.68731108984, 1.09205635862, 0.772819797575, 0.605636379554,
    0.48309405692, 0.380429446972, 0.295774038565 },
  { 1.00227514334, 1.2305666963, 0.875748795257, 0.605636379554, 0.448996256676,
    0.352889268808, 0.283006984131, 0.226951348204 },
  { 0.678296995242, 0.868920337363, 0.670882927016, 0.48309405692,
    0.352889268808, 0.27032073436, 0.215017739696, 0.17408067321 },
  { 0.466224900598, 0.61280991668, 0.501731932449, 0.380429446972,
    0.283006984131, 0.215017739696, 0.168869545842, 0.136153931001 },
  { 0.3265091542, 0.436405793551, 0.372504254596, 0.295774038565,
    0.226951348204, 0.17408067321, 0.136153931001, 0.109083846276 }
};
static const double csf_cb420[8][8] = {
  { 1.91113096927, 2.46074210438, 1.18284184739, 1.14982565193, 1.05017074788,
    0.898018824055, 0.74725392039, 0.615105596242 },
  { 2.46074210438, 1.58529308355, 1.21363250036, 1.38190029285, 1.33100189972,
    1.17428548929, 0.996404342439, 0.830890433625 },
  { 1.18284184739, 1.21363250036, 0.978712413627, 1.02624506078, 1.03145147362,
    0.960060382087, 0.849823426169, 0.731221236837 },
  { 1.14982565193, 1.38190029285, 1.02624506078, 0.861317501629, 0.801821139099,
    0.751437590932, 0.685398513368, 0.608694761374 },
  { 1.05017074788, 1.33100189972, 1.03145147362, 0.801821139099, 0.676555426187,
    0.605503172737, 0.55002013668, 0.495804539034 },
  { 0.898018824055, 1.17428548929, 0.960060382087, 0.751437590932,
    0.605503172737, 0.514674450957, 0.454353482512, 0.407050308965 },
  { 0.74725392039, 0.996404342439, 0.849823426169, 0.685398513368,
    0.55002013668, 0.454353482512, 0.389234902883, 0.342353999733 },
  { 0.615105596242, 0.830890433625, 0.731221236837, 0.608694761374,
    0.495804539034, 0.407050308965, 0.342353999733, 0.295530605237 }
};
static const double csf_cr420[8][8] = {
  { 2.03871978502, 2.62502345193, 1.26180942886, 1.11019789803, 1.01397751469,
    0.867069376285, 0.721500455585, 0.593906509971 },
  { 2.62502345193, 1.69112867013, 1.17180569821, 1.3342742857, 1.28513006198,
    1.13381474809, 0.962064122248, 0.802254508198 },
  { 1.26180942886, 1.17180569821, 0.944981930573, 0.990876405848,
    0.995903384143, 0.926972725286, 0.820534991409, 0.706020324706 },
  { 1.11019789803, 1.3342742857, 0.990876405848, 0.831632933426, 0.77418706195,
    0.725539939514, 0.661776842059, 0.587716619023 },
  { 1.01397751469, 1.28513006198, 0.995903384143, 0.77418706195, 0.653238524286,
    0.584635025748, 0.531064164893, 0.478717061273 },
  { 0.867069376285, 1.13381474809, 0.926972725286, 0.725539939514,
    0.584635025748, 0.496936637883, 0.438694579826, 0.393021669543 },
  { 0.721500455585, 0.962064122248, 0.820534991409, 0.661776842059,
    0.531064164893, 0.438694579826, 0.375820256136, 0.330555063063 },
  { 0.593906509971, 0.802254508198, 0.706020324706, 0.587716619023,
    0.478717061273, 0.393021669543, 0.330555063063, 0.285345396658 }
};

static double convert_score_db(double _score, double _weight, int bit_depth) {
  int16_t pix_max = 255;
  assert(_score * _weight >= 0.0);
  if (bit_depth == 10)
    pix_max = 1023;
  else if (bit_depth == 12)
    pix_max = 4095;

  if (_weight * _score < pix_max * pix_max * 1e-10) return MAX_PSNR;
  return 10 * (log10(pix_max * pix_max) - log10(_weight * _score));
}

static double calc_psnrhvs(const unsigned char *src, int _systride,
                           const unsigned char *dst, int _dystride, double _par,
                           int _w, int _h, int _step, const double _csf[8][8],
                           uint32_t bit_depth, uint32_t _shift) {
  double ret;
  const uint8_t *_src8 = src;
  const uint8_t *_dst8 = dst;
  const uint16_t *_src16 = CONVERT_TO_SHORTPTR(src);
  const uint16_t *_dst16 = CONVERT_TO_SHORTPTR(dst);
  int16_t dct_s[8 * 8], dct_d[8 * 8];
  tran_low_t dct_s_coef[8 * 8], dct_d_coef[8 * 8];
  double mask[8][8];
  int pixels;
  int x;
  int y;
  (void)_par;
  ret = pixels = 0;

  /*In the PSNR-HVS-M paper[1] the authors describe the construction of
   their masking table as "we have used the quantization table for the
   color component Y of JPEG [6] that has been also obtained on the
   basis of CSF. Note that the values in quantization table JPEG have
   been normalized and then squared." Their CSF matrix (from PSNR-HVS)
   was also constructed from the JPEG matrices. I can not find any obvious
   scheme of normalizing to produce their table, but if I multiply their
   CSF by 0.38857 and square the result I get their masking table.
   I have no idea where this constant comes from, but deviating from it
   too greatly hurts MOS agreement.

   [1] Nikolay Ponomarenko, Flavia Silvestri, Karen Egiazarian, Marco Carli,
   Jaakko Astola, Vladimir Lukin, "On between-coefficient contrast masking
   of DCT basis functions", CD-ROM Proceedings of the Third
   International Workshop on Video Processing and Quality Metrics for Consumer
   Electronics VPQM-07, Scottsdale, Arizona, USA, 25-26 January, 2007, 4 p.*/
  for (x = 0; x < 8; x++)
    for (y = 0; y < 8; y++)
      mask[x][y] =
          (_csf[x][y] * 0.3885746225901003) * (_csf[x][y] * 0.3885746225901003);
  for (y = 0; y < _h - 7; y += _step) {
    for (x = 0; x < _w - 7; x += _step) {
      int i;
      int j;
      double s_means[4];
      double d_means[4];
      double s_vars[4];
      double d_vars[4];
      double s_gmean = 0;
      double d_gmean = 0;
      double s_gvar = 0;
      double d_gvar = 0;
      double s_mask = 0;
      double d_mask = 0;
      for (i = 0; i < 4; i++)
        s_means[i] = d_means[i] = s_vars[i] = d_vars[i] = 0;
      for (i = 0; i < 8; i++) {
        for (j = 0; j < 8; j++) {
          int sub = ((i & 12) >> 2) + ((j & 12) >> 1);
          if (bit_depth == 8 && _shift == 0) {
            dct_s[i * 8 + j] = _src8[(y + i) * _systride + (j + x)];
            dct_d[i * 8 + j] = _dst8[(y + i) * _dystride + (j + x)];
          } else if (bit_depth == 10 || bit_depth == 12) {
            dct_s[i * 8 + j] = _src16[(y + i) * _systride + (j + x)] >> _shift;
            dct_d[i * 8 + j] = _dst16[(y + i) * _dystride + (j + x)] >> _shift;
          }
          s_gmean += dct_s[i * 8 + j];
          d_gmean += dct_d[i * 8 + j];
          s_means[sub] += dct_s[i * 8 + j];
          d_means[sub] += dct_d[i * 8 + j];
        }
      }
      s_gmean /= 64.f;
      d_gmean /= 64.f;
      for (i = 0; i < 4; i++) s_means[i] /= 16.f;
      for (i = 0; i < 4; i++) d_means[i] /= 16.f;
      for (i = 0; i < 8; i++) {
        for (j = 0; j < 8; j++) {
          int sub = ((i & 12) >> 2) + ((j & 12) >> 1);
          s_gvar += (dct_s[i * 8 + j] - s_gmean) * (dct_s[i * 8 + j] - s_gmean);
          d_gvar += (dct_d[i * 8 + j] - d_gmean) * (dct_d[i * 8 + j] - d_gmean);
          s_vars[sub] += (dct_s[i * 8 + j] - s_means[sub]) *
                         (dct_s[i * 8 + j] - s_means[sub]);
          d_vars[sub] += (dct_d[i * 8 + j] - d_means[sub]) *
                         (dct_d[i * 8 + j] - d_means[sub]);
        }
      }
      s_gvar *= 1 / 63.f * 64;
      d_gvar *= 1 / 63.f * 64;
      for (i = 0; i < 4; i++) s_vars[i] *= 1 / 15.f * 16;
      for (i = 0; i < 4; i++) d_vars[i] *= 1 / 15.f * 16;
      if (s_gvar > 0)
        s_gvar = (s_vars[0] + s_vars[1] + s_vars[2] + s_vars[3]) / s_gvar;
      if (d_gvar > 0)
        d_gvar = (d_vars[0] + d_vars[1] + d_vars[2] + d_vars[3]) / d_gvar;
#if CONFIG_VP9_HIGHBITDEPTH
      if (bit_depth == 10 || bit_depth == 12) {
        hbd_od_bin_fdct8x8(dct_s_coef, 8, dct_s, 8);
        hbd_od_bin_fdct8x8(dct_d_coef, 8, dct_d, 8);
      }
#endif
      if (bit_depth == 8) {
        od_bin_fdct8x8(dct_s_coef, 8, dct_s, 8);
        od_bin_fdct8x8(dct_d_coef, 8, dct_d, 8);
      }
      for (i = 0; i < 8; i++)
        for (j = (i == 0); j < 8; j++)
          s_mask += dct_s_coef[i * 8 + j] * dct_s_coef[i * 8 + j] * mask[i][j];
      for (i = 0; i < 8; i++)
        for (j = (i == 0); j < 8; j++)
          d_mask += dct_d_coef[i * 8 + j] * dct_d_coef[i * 8 + j] * mask[i][j];
      s_mask = sqrt(s_mask * s_gvar) / 32.f;
      d_mask = sqrt(d_mask * d_gvar) / 32.f;
      if (d_mask > s_mask) s_mask = d_mask;
      for (i = 0; i < 8; i++) {
        for (j = 0; j < 8; j++) {
          double err;
          err = fabs((double)(dct_s_coef[i * 8 + j] - dct_d_coef[i * 8 + j]));
          if (i != 0 || j != 0)
            err = err < s_mask / mask[i][j] ? 0 : err - s_mask / mask[i][j];
          ret += (err * _csf[i][j]) * (err * _csf[i][j]);
          pixels++;
        }
      }
    }
  }
  if (pixels <= 0) return 0;
  ret /= pixels;
  return ret;
}

double vpx_psnrhvs(const YV12_BUFFER_CONFIG *src,
                   const YV12_BUFFER_CONFIG *dest, double *y_psnrhvs,
                   double *u_psnrhvs, double *v_psnrhvs, uint32_t bd,
                   uint32_t in_bd) {
  double psnrhvs;
  const double par = 1.0;
  const int step = 7;
  uint32_t bd_shift = 0;
  vpx_clear_system_state();

  assert(bd == 8 || bd == 10 || bd == 12);
  assert(bd >= in_bd);

  bd_shift = bd - in_bd;

  *y_psnrhvs = calc_psnrhvs(src->y_buffer, src->y_stride, dest->y_buffer,
                            dest->y_stride, par, src->y_crop_width,
                            src->y_crop_height, step, csf_y, bd, bd_shift);
  *u_psnrhvs = calc_psnrhvs(src->u_buffer, src->uv_stride, dest->u_buffer,
                            dest->uv_stride, par, src->uv_crop_width,
                            src->uv_crop_height, step, csf_cb420, bd, bd_shift);
  *v_psnrhvs = calc_psnrhvs(src->v_buffer, src->uv_stride, dest->v_buffer,
                            dest->uv_stride, par, src->uv_crop_width,
                            src->uv_crop_height, step, csf_cr420, bd, bd_shift);
  psnrhvs = (*y_psnrhvs) * .8 + .1 * ((*u_psnrhvs) + (*v_psnrhvs));
  return convert_score_db(psnrhvs, 1.0, in_bd);
}