From 3562d6b0a2cfccb1fb8fc18f065089f00d300216 Mon Sep 17 00:00:00 2001 From: Marco Date: Wed, 6 Dec 2017 11:21:29 -0800 Subject: vp9-svc: Set downsampling filter for VGA layer. Downsampling filter for SVC was set to subsample (phase 0) for HD -> VGA, and bilinear averaging (phase 8) for VGA -> QVGA. This change makes it bilinear averaging for HD -> VGA. Given the recent commit 9f9d4f8, quality is improved with this change: avgPSNR/SSIM up ~1-3% on HD clips in RTC set. Speed decrease of ~1% for 3 layer SVC. Change-Id: If834a320e372b8b922a6bf7cab4227703b1beae6 --- vp9/encoder/vp9_svc_layercontext.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'vp9') diff --git a/vp9/encoder/vp9_svc_layercontext.c b/vp9/encoder/vp9_svc_layercontext.c index 38895be68..d215cf64a 100644 --- a/vp9/encoder/vp9_svc_layercontext.c +++ b/vp9/encoder/vp9_svc_layercontext.c @@ -656,9 +656,9 @@ int vp9_one_pass_cbr_svc_start_layer(VP9_COMP *const cpi) { lc->scaling_factor_num, lc->scaling_factor_den, &width, &height); - // For resolutions <= QVGA: set phase of the filter = 8 (for symmetric + // For resolutions <= VGA: set phase of the filter = 8 (for symmetric // averaging filter), use bilinear for now. - if (width * height <= 320 * 240) { + if (width * height <= 640 * 480) { cpi->svc.downsample_filter_type[cpi->svc.spatial_layer_id] = BILINEAR; cpi->svc.downsample_filter_phase[cpi->svc.spatial_layer_id] = 8; } -- cgit v1.2.3