When downscaling multiple times in a raw, ensure a minimum amount of strength

git-svn-id: http://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@4041 ed541006-0bf7-43e9-8c4d-6fc63c346d47

Author: qbix79

src/dosbox.cpp

@@ -245,6 +245,10 @@ void increaseticks() { //Make it return ticksRemain and set it in the function a
 				if (ticksScheduled >= 250 && ticksDone < 10 && ratio > 5120 && CPU_CycleMax > 50000)
 					ratio = 5120;
 
+				// When downscaling multiple times in a row, ensure a minimum amount of downscaling
+				if (ticksAdded > 15 && ticksScheduled >= 5 && ticksScheduled <= 20 && ratio > 800)
+					ratio = 800;
+
 				if (ratio <= 1024) {
 					double r = 2.0 /(1.0 + 1024.0/(static_cast<double>(ratio)));
 					new_cmax = 1 + static_cast<Bit32s>(CPU_CycleMax * r);