+// Set the variance split thresholds for following the block sizes:
+// 0 - threshold_64x64, 1 - threshold_32x32, 2 - threshold_16x16,
+// 3 - vbp_threshold_8x8. vbp_threshold_8x8 (to split to 4x4 partition) is
+// currently only used on key frame.
+static void set_vbp_thresholds(VP9_COMP *cpi, int64_t thresholds[], int q) {
+ VP9_COMMON *const cm = &cpi->common;
+ const int is_key_frame = (cm->frame_type == KEY_FRAME);
+ const int threshold_multiplier = is_key_frame ? 20 : 1;
+ const int64_t threshold_base = (int64_t)(threshold_multiplier *
+ cpi->y_dequant[q][1]);
+ if (is_key_frame) {
+ thresholds[0] = threshold_base;
+ thresholds[1] = threshold_base >> 2;
+ thresholds[2] = threshold_base >> 2;
+ thresholds[3] = threshold_base << 2;
+ } else {
+ thresholds[1] = threshold_base;
+ if (cm->width <= 352 && cm->height <= 288) {
+ thresholds[0] = threshold_base >> 2;
+ thresholds[2] = threshold_base << 3;
+ } else {
+ thresholds[0] = threshold_base;
+ thresholds[1] = (5 * threshold_base) >> 2;
+ if (cm->width >= 1920 && cm->height >= 1080)
+ thresholds[1] = (7 * threshold_base) >> 2;
+ thresholds[2] = threshold_base << cpi->oxcf.speed;
+ }
+ }
+}