Create BMS Tool.cxx

A balance and mid/side tool

Scripts/BMS Tool.cxx

@@ -0,0 +1,54 @@
+/** \file
+*   Mid/Side Enhancer.
+*   For stereo audio streams only (2 channels).
+*/
+
+string name="BMS Tool";
+string description="Balance & Mid/Side Tool";
+string author="James Cadwallader";
+
+bool initialize()
+{
+    if(audioInputsCount!=2)
+    {
+        print("Error: this script requires 2 audio channels, not "+audioInputsCount);
+        return false;
+    }
+    return true;
+}
+
+array<string> inputParametersNames={"Left","Right","Mid","Side"};
+array<string> inputParametersUnits={"dB","dB","dB","dB"};
+array<double> inputParameters(inputParametersNames.length);
+array<double> inputParametersMin={-24,-24,-24,-24};
+array<double> inputParametersMax={12,12,12,12};
+array<double> inputParametersDefault={0,0,0,0};
+
+double leftgain=0;
+double rightgain=0;
+double midgain=0;
+double sidegain=0;
+
+void processSample(array<double>& ioSample)
+{
+   ioSample[0]*=leftgain;
+   ioSample[1]*=rightgain;
+   double mid=ioSample[0];
+   double side=ioSample[1];
+   ioSample[0]=.5*(mid+side);
+   ioSample[1]=mid-side;
+   ioSample[0]*=midgain;
+   ioSample[1]*=sidegain;
+   double unmid=ioSample[0];
+   double unside=ioSample[1];
+   ioSample[0]=unmid+(.5*unside);
+   ioSample[1]=unmid-(.5*unside);
+}
+
+void updateInputParameters()
+{
+   leftgain=pow(10,inputParameters[0]/20);
+   rightgain=pow(10,inputParameters[1]/20);
+   midgain=pow(10,inputParameters[2]/20);
+   sidegain=pow(10,inputParameters[3]/20);
+}