From 6d2f5eacdb31bf1eb19f13290b8b3f4c53c461c1 Mon Sep 17 00:00:00 2001
From: Joao Carreira <jfmcarreira@gmail.com>
Date: Thu, 24 Nov 2016 18:24:32 +0000
Subject: [PATCH] Fix PSNR formula

---
 lib/PlaYUVerFrame.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/PlaYUVerFrame.cpp b/lib/PlaYUVerFrame.cpp
index 6737c30..7a2325d 100644
--- a/lib/PlaYUVerFrame.cpp
+++ b/lib/PlaYUVerFrame.cpp
@@ -1327,10 +1327,12 @@ Double PlaYUVerFrame::getMSE( PlaYUVerFrame* Org, Int component )
 
 Double PlaYUVerFrame::getPSNR( PlaYUVerFrame* Org, Int component )
 {
+  UInt uiMaxValue = ( 1 << Org->getBitsPel() );
+  Double uiMaxValueSquare = uiMaxValue * uiMaxValue;
   Double dPSNR = 100;
   Double dMSE = getMSE( Org, component );
   if( dMSE != 0 )
-    dPSNR = 10 * log10( 65025 / dMSE );
+    dPSNR = 10 * log10( uiMaxValueSquare / dMSE );
   return dPSNR;
 }