Merge "[Improvement]Fix loss of permissibleRatio calcaulation accuracy."

2021-03-30 18:21:08 +00:00
parent ba4eeb87dd 2aaa220e0f
commit f9c69a2c37
1 changed files with 2 additions and 3 deletions
--- a/services/core/java/com/android/server/display/BrightnessMappingStrategy.java
+++ b/services/core/java/com/android/server/display/BrightnessMappingStrategy.java
@@ -440,9 +440,8 @@ public abstract class BrightnessMappingStrategy {
    }

    private float permissibleRatio(float currLux, float prevLux) {
-        return MathUtils.exp(MAX_GRAD
-                * (MathUtils.log(currLux + LUX_GRAD_SMOOTHING)
-                    - MathUtils.log(prevLux + LUX_GRAD_SMOOTHING)));
+        return MathUtils.pow((currLux + LUX_GRAD_SMOOTHING)
+                / (prevLux + LUX_GRAD_SMOOTHING), MAX_GRAD);
    }

    protected float inferAutoBrightnessAdjustment(float maxGamma, float desiredBrightness,