ref: c73a44c725ab76fdec608fb63c7c22d1e189deef
parent: 43fc0879082e9c010c08c68c6147527f0d859bf9
author: Marco Paniconi <[email protected]>
date: Fri Mar 1 17:03:10 EST 2019
vp9-rtc: Adjust force split logic for screen mode In variance partition for screen content mode: force split to 32x32 if source pre-process detects non-zero temporal sad. Reduce artifacts in scroll motion content. Change-Id: Ifbe2b500eb03ae853faa28a045ce4f1185443939
--- a/vp9/encoder/vp9_encodeframe.c
+++ b/vp9/encoder/vp9_encodeframe.c
@@ -1265,9 +1265,10 @@
int pixels_wide = 64, pixels_high = 64;
int64_t thresholds[4] = { cpi->vbp_thresholds[0], cpi->vbp_thresholds[1],
cpi->vbp_thresholds[2], cpi->vbp_thresholds[3] };
- int scene_change_detected =
+ int force_64_split =
cpi->rc.high_source_sad ||
- (cpi->use_svc && cpi->svc.high_source_sad_superframe);
+ (cpi->use_svc && cpi->svc.high_source_sad_superframe) ||
+ (cpi->oxcf.content == VP9E_CONTENT_SCREEN && !x->zero_temp_sad_source);
// For the variance computation under SVC mode, we treat the frame as key if
// the reference (base layer frame) is key frame (i.e., is_key_frame == 1).
@@ -1330,7 +1331,7 @@
}
// If source_sad is low copy the partition without computing the y_sad.
if (x->skip_low_source_sad && cpi->sf.copy_partition_flag &&
- !scene_change_detected &&
+ !force_64_split &&
copy_partitioning(cpi, x, xd, mi_row, mi_col, segment_id, sb_offset)) {
x->sb_use_mv_part = 1;
if (cpi->sf.svc_use_lowres_part &&
@@ -1359,7 +1360,7 @@
// Index for force_split: 0 for 64x64, 1-4 for 32x32 blocks,
// 5-20 for the 16x16 blocks.
- force_split[0] = scene_change_detected;
+ force_split[0] = force_64_split;
if (!is_key_frame) {
// In the case of spatial/temporal scalable coding, the assumption here is