From 7abc05c9af7468ea9ad9df31505181eafaec9341 Mon Sep 17 00:00:00 2001 From: JackyChen Date: Wed, 15 Jun 2016 10:14:14 -0700 Subject: [PATCH] vp9: Add bias to last frame in choose_partitioning. This change is only for real-time mode if short_circuit_low_temp_var is on. Add bias to last frame in choosing ref frame for partitioning, when y_sad and y_sad_g are close. It speeds up real-time encoding by 0.5% on some clips with less than 0.1% overall PSNR drop on rtc test set. Change-Id: I2a2110fe36455f3d8f0fc404aef2228f512e8df8 --- vp9/encoder/vp9_encodeframe.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/vp9/encoder/vp9_encodeframe.c b/vp9/encoder/vp9_encodeframe.c index d8bfb9d79..6af0c0b9d 100644 --- a/vp9/encoder/vp9_encodeframe.c +++ b/vp9/encoder/vp9_encodeframe.c @@ -796,7 +796,7 @@ static int choose_partitioning(VP9_COMP *cpi, const YV12_BUFFER_CONFIG *yv12 = get_ref_frame_buffer(cpi, LAST_FRAME); const YV12_BUFFER_CONFIG *yv12_g = NULL; - unsigned int y_sad, y_sad_g; + unsigned int y_sad, y_sad_g, y_sad_thr; const BLOCK_SIZE bsize = BLOCK_32X32 + (mi_col + 4 < cm->mi_cols) * 2 + (mi_row + 4 < cm->mi_rows); @@ -829,7 +829,10 @@ static int choose_partitioning(VP9_COMP *cpi, mi->interp_filter = BILINEAR; y_sad = vp9_int_pro_motion_estimation(cpi, x, bsize, mi_row, mi_col); - if (y_sad_g < y_sad) { + // Pick ref frame for partitioning, bias last frame when y_sad_g and y_sad + // are close if short_circuit_low_temp_var is on. + y_sad_thr = cpi->sf.short_circuit_low_temp_var ? (y_sad * 7) >> 3 : y_sad; + if (y_sad_g < y_sad_thr) { vp9_setup_pre_planes(xd, 0, yv12_g, mi_row, mi_col, &cm->frame_refs[GOLDEN_FRAME - 1].sf); mi->ref_frame[0] = GOLDEN_FRAME; -- 2.40.0