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  /external/libvpx/libvpx/vpx_dsp/
psnrhvs.c 130 float d_means[4]; local
140 s_means[i] = d_means[i] = s_vars[i] = d_vars[i] = 0;
149 d_means[sub] += dct_d[i * 8 + j];
157 d_means[i] /= 16.f;
165 d_vars[sub] += (dct_d[i * 8 + j] - d_means[sub])
166 * (dct_d[i * 8 + j] - d_means[sub]);

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