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vp9: Update threshold for partition copy.

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Avoid many visual artifacts. Compression quality is improved by more
than 1%. Encode speed is about 4% for QVGA and 6% for VGA faster on
android.

Change-Id: I4dd0a81429ddf7efdef1e80a191da5fb8de8e8af
This commit is contained in:
Jerome Jiang 2017-01-12 17:59:22 -08:00
parent f129e09529
commit 2ff2376fbc
1 changed files with 6 additions and 4 deletions
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10
vp9/encoder/vp9_encodeframe.c
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@ -527,11 +527,13 @@ void vp9_set_variance_partition_thresholds(VP9_COMP *cpi, int q) {
: 1000;
cpi->vbp_bsize_min = BLOCK_16X16;
if (cm->width <= 352 && cm->height <= 288)
cpi->vbp_threshold_copy = 40960;
cpi->vbp_threshold_copy = 4000;
else if (cm->width <= 640 && cm->height <= 360)
cpi->vbp_threshold_copy = 9000;
else
cpi->vbp_threshold_copy = (cpi->y_dequant[q][1] << 6) > 32000
? (cpi->y_dequant[q][1] << 6)
: 32000;
cpi->vbp_threshold_copy = (cpi->y_dequant[q][1] << 5) > 16000
? (cpi->y_dequant[q][1] << 5)
: 16000;
}
cpi->vbp_threshold_minmax = 15 + (q >> 3);
}