Crashfix for SetAcqDepth rounding issue (Crashreport 21-8-2016 11:41:32)

Author: riemerg

Devices/DummyScope.cs

@@ -492,9 +492,15 @@ public uint AcquisitionDepth
                     }
                     else
                     {
-                        double log2OfRatio = Math.Log((double)value / OVERVIEW_LENGTH, 2);
-                        if (log2OfRatio != (int)log2OfRatio && !isAudio)
-                            throw new ValidationException("Acquisition depth must be " + OVERVIEW_LENGTH + " * 2^N  ---  " + log2OfRatio.ToString() + " vs " + ((int)log2OfRatio).ToString());
+                        double log2OfRatio = Math.Log((double)value / OVERVIEW_LENGTH, 2);
+                        if (log2OfRatio != (int)log2OfRatio && !isAudio)
+                        {
+                            //this only happens on some platforms. If it happens, the difference is like 20,9999999996641 vs 20
+                            //probably rounding issue -> round and correct instead of crash
+                            Logger.Error("Acquisition depth must be " + OVERVIEW_LENGTH + " * 2^N  ---  " + log2OfRatio.ToString() + " vs " + ((int)log2OfRatio).ToString());
+                            log2OfRatio = (int)Math.Round(log2OfRatio);
+                            value = (uint)Math.Pow(2, log2OfRatio);
+                        }
                         if (value > ACQUISITION_DEPTH_MAX)
                             acquisitionDepth = ACQUISITION_DEPTH_MAX;
                         else