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vp9: Add bias to last frame in choose_partitioning.

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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
This commit is contained in:
JackyChen 2016-06-15 10:14:14 -07:00
parent 9c90830165
commit 7abc05c9af
1 changed files with 5 additions and 2 deletions
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7
vp9/encoder/vp9_encodeframe.c
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@ -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;