vp9: Incorporate source sum_diff into non-rd partition thresholds.

Increase the variance partition thresholds for superblocks that
have low sum-diff (from source analysis prior to encoding frame).
Use it for now only for speed >= 7 or for denoising on.

Small change on metrics for rtc set: less than ~0.1 avgPNSR decrease
on RTC set, for both speed 7 and 8.

Change-Id: I38325046ebd5f371f51d6e91233d68ff73561af1

1 files changed, 6 insertions, 5 deletions

diff --git a/vp9/encoder/vp9_denoiser.c b/vp9/encoder/vp9_denoiser.c
index afc66d00f..c16429caf 100644
--- a/vp9/encoder/vp9_denoiser.c
+++ b/vp9/encoder/vp9_denoiser.c
@@ -565,12 +565,13 @@ void vp9_denoiser_set_noise_level(VP9_DENOISER *denoiser, int noise_level) {
 }
 
 // Scale/increase the partition threshold for denoiser speed-up.
-int64_t vp9_scale_part_thresh(int64_t threshold,
-                              VP9_DENOISER_LEVEL noise_level) {
-  if (noise_level >= kDenLow)
-    return ((5 * threshold) >> 2);
+int64_t vp9_scale_part_thresh(int64_t threshold, VP9_DENOISER_LEVEL noise_level,
+                              int content_state) {
+  if ((content_state == kLowSadLowSumdiff) ||
+      (content_state == kHighSadLowSumdiff) || noise_level == kDenHigh)
+    return (3 * threshold) >> 1;
   else
-    return threshold;
+    return (5 * threshold) >> 2;
 }
 
 //  Scale/increase the ac skip threshold for denoiser speed-up.