Commit 559166ac authored by Marco's avatar Marco

vp9-svc: Enbale scale partition reference frames.

For reference frames: enable scale partition for
superblocks with low source sad or if bsize on lower-resoln
is at least 32x32.

Keep feature disabled for base temporal layer.

Small regression in avgPNSR/SSIM metrics, ~0.5-1%.
Speedup ~2-3% on mac for SVC (3 spatial/3 temporal layers) at speed 7.

Change-Id: I5987eb7763845b680059128b538bb5188be0cca5
parent 849b3c23
......@@ -962,6 +962,12 @@ static int scale_partitioning_svc(VP9_COMP *cpi, MACROBLOCK *x, MACROBLOCKD *xd,
// The block size is too big for boundaries. Do variance based partitioning.
if ((!has_rows || !has_cols) && bsize_low > BLOCK_16X16) return 1;
// For reference frames: return 1 (do variance-based partitioning) if the
// superblock is not low source sad and lower-resoln bsize is below 32x32.
if (!cpi->svc.non_reference_frame && !x->skip_low_source_sad &&
bsize_low < BLOCK_32X32)
return 1;
// Scale up block size by 2x2. Force 64x64 for size larger than 32x32.
if (bsize_low < BLOCK_32X32) {
bsize_high = bsize_low + 3;
......
......@@ -607,10 +607,9 @@ static void set_rt_speed_feature_framesize_independent(
}
// For SVC: enable use of lower resolution partition for higher resolution,
// only for 3 spatial layers and when config/top resolution is above VGA.
// Enable only for top temporal enhancement layer (which are non-reference
// frames for the fixed SVC patterns).
// Enable only for non-base temporal layer frames.
if (cpi->use_svc && cpi->svc.number_spatial_layers == 3 &&
cpi->svc.temporal_layer_id == cpi->svc.number_temporal_layers - 1 &&
cpi->svc.temporal_layer_id > 0 &&
cpi->oxcf.width * cpi->oxcf.height > 640 * 480)
sf->svc_use_lowres_part = 1;
}
......
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