X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/1059e1cc0c2ecfa237406949aa26155b6a5b9154..66f23d4fabf89ad09adbd4dfc15ac6b5b2b7da83:/interpreter/preprocessor/faust-0.9.47mr3/benchmark/rms.dsp

diff --git a/interpreter/preprocessor/faust-0.9.47mr3/benchmark/rms.dsp b/interpreter/preprocessor/faust-0.9.47mr3/benchmark/rms.dsp
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+// Root Mean Square of n consecutive samples
+RMS(n) = square : mean(n) : sqrt ;
+
+// the square of a signal
+square(x) = x * x ;
+
+// the mean of n consecutive samples of a signal
+// uses fixpoint to avoid the accumulation of
+// rounding errors 
+mean(n) = float2fix : integrate(n) : fix2float : /(n); 
+
+// the sliding sum of n consecutive samples of a signal
+integrate(n,x) = x - x@n : +~_ ;
+
+// convertion between float and fix point
+float2fix(x) = int(x*(1<<20));      
+fix2float(x) = float(x)/(1<<20);    
+
+// Root Mean Square of 1000 consecutive samples
+process = RMS(1000) ;