Fixes for flot2mozzi.py script

extras/python/float2mozzi.py

@@ -1,48 +1,53 @@
-## for converting 32 bit float raw files from Audacity, with values  -128 to 127 int8 Mozzi table
+#!/usr/bin/env python3
+"""
+for converting 32 bit float raw files from Audacity, with values -128 to 127 int8 Mozzi table
+"""
 
-import sys, array, os, textwrap, math
+import array
+import math
+import os
+import sys
+import textwrap
 
+
+def float2mozzi(infile, outfile, tablename, samplerate):
+    with open(os.path.expanduser(infile), "rb") as fin:
+        print("opened ", infile)
+        valuesetad = int(
+            os.path.getsize(os.path.expanduser(infile)) / 4
+        )  ## adjust for number format
+
+        valuesfromfile = array.array("f")  # array of floats
+        valuesfromfile.fromfile(fin, valuesetad)
+
+    values = valuesfromfile.tolist()
+
+    with open(os.path.expanduser(outfile), "w") as fout:
+        fout.write("#ifndef " + tablename + "_H_" + "\n")
+        fout.write("#define " + tablename + "_H_" + "\n \n")
+        fout.write("#include <Arduino.h>" + "\n")
+        fout.write('#include "mozzi_pgmspace.h"' + "\n \n")
+        fout.write("#define " + tablename + "_NUM_CELLS " + str(len(values)) + "\n")
+        fout.write("#define " + tablename + "_SAMPLERATE " + str(samplerate) + "\n \n")
+        outstring = "CONSTTABLE_STORAGE(int8_t) " + tablename + "_DATA [] = {"
+        try:
+            for num in values:
+                outstring += str(math.trunc((num * 128) + 0.5)) + ", "
+        finally:
+            outstring += "};"
+            outstring = textwrap.fill(outstring, 80)
+            fout.write(outstring)
+            fout.write("\n \n#endif /* " + tablename + "_H_ */\n")
+            print("wrote ", outfile)
+
+    return 0
+
+
+if __name__ == "__main__":
     if len(sys.argv) != 5:
-        print 'Usage: float2mozzi.py <infile outfile tablename samplerate>'
+        print("Usage: float2mozzi.py <infile outfile tablename samplerate>")
         sys.exit(1)
 
-[infile, outfile, tablename, samplerate] = sys.argv[1:]
-
-def float2mozzi(infile, outfile, tablename,samplerate):
-    fin = open(os.path.expanduser(infile), "rb")
-    print "opened " + infile
-    valuesetad = os.path.getsize(os.path.expanduser(infile))/4 ## adjust for number format
-
-    ##print valuesetad
-    valuesfromfile = array.array('f')## array of floats
-    try:
-        valuesfromfile.fromfile(fin,valuesetad)
-    finally:
-        fin.close()
-
-    values=valuesfromfile.tolist()
-##    print values[0]
-##    print values[len(values)-1]
-##    print len(values)
-    fout = open(os.path.expanduser(outfile), "w")
-    fout.write('#ifndef ' + tablename + '_H_' + '\n')
-    fout.write('#define ' + tablename + '_H_' + '\n \n')
-    fout.write('#include <Arduino.h>'+'\n')
-    fout.write('#include "mozzi_pgmspace.h"'+'\n \n')
-    fout.write('#define ' + tablename + '_NUM_CELLS '+ str(len(values))+'\n')
-    fout.write('#define ' + tablename + '_SAMPLERATE '+ str(samplerate)+'\n \n')
-    outstring = 'CONSTTABLE_STORAGE(int8_t) ' + tablename + '_DATA [] = {'
-    try:
-        for num in values:
-            outstring += str(math.trunc((num*256)+0.5)) + ", "
- ##           outstring += str(num) + ", "
-        ##values.fromfile(fin, uint8_tsetad)
-    finally:
-        outstring +=  "};"
-        outstring = textwrap.fill(outstring, 80)
-        fout.write(outstring)
-        fout.write('\n \n #endif /* ' + tablename + '_H_ */\n')
-        fout.close()
-        print "wrote " + outfile
-
-float2mozzi(infile, outfile, tablename, samplerate)
+    [infile, outfile, tablename, samplerate] = sys.argv[1:]
+
+    sys.exit(float2mozzi(infile, outfile, tablename, samplerate))