Added standard tables generating script

Author: tomcombriat

extras/python/make_standard_tables.py

@@ -0,0 +1,164 @@
+#!/usr/bin/python3
+
+"""
+ * make_standard_tables.py
+ * 
+ * This file is part of Mozzi.
+ *
+ * Copyright 2012-2024 Thomas Combriat and the Mozzi Team
+ *
+ * Mozzi is licensed under the GNU Lesser General Public Licence (LGPL) Version 2.1 or later.
+ *
+ * This file allows to regenerate the standard tables of Mozzi (sin, cos, cosphase, triangle and saw)
+"""
+
+import numpy as np  # numerics
+import textwrap
+import os as os
+#import math as math  # math
+
+folder = ".."+os.sep+".."+os.sep+"tables" + os.sep
+
+def write_header(fout, samplerate,name):
+    tablename = name.upper()+str(samplerate)+"_INT8"
+    fout.write('#ifndef ' + tablename + '_H_' + '\n')
+    fout.write('#define ' + tablename + '_H_' + '\n \n')
+    fout.write("/**\n This table is part of Mozzi\n Generated with extras/python/make_standard_tables.py\n*/\n\n")
+    fout.write('#include <Arduino.h>'+'\n')
+    fout.write('#include "mozzi_pgmspace.h"'+'\n \n')
+    fout.write('#define ' + tablename + '_NUM_CELLS '+ str(samplerate)+'\n')
+    fout.write('#define ' + tablename + '_SAMPLERATE '+ str(samplerate)+'\n \n')
+    fout.write('CONSTTABLE_STORAGE(int8_t) ' + tablename + '_DATA [] = {\n')
+
+def write_footer(fout,samplerate,name):
+    tablename = name.upper()+str(samplerate)+"_INT8"
+    fout.write('\n }; \n \n #endif /* ' + tablename + '_H_ */\n')
+
+
+
+
+    
+#### SIN
+
+SR = [256,512,1024,2048,4096,8192]
+name = "sin"
+
+for s in SR:
+    fout = open(folder+name+str(s)+"_int8.h","w")
+    
+    write_header(fout,s,name)
+    
+    t = np.linspace(0,2*np.pi,num=s,endpoint=False)
+    outstring=""
+    for i in range(s):
+        outstring+=str(round(127*np.sin(t[i])))+", "
+        
+    outstring = textwrap.fill(outstring,80)
+    fout.write(outstring)
+    write_footer(fout,s,name)
+    fout.close()
+
+    print("Wrote:"+name.upper()+str(s)+"_INT8")
+    
+    
+#### COS
+# Note that this is actually a negative cos
+
+SR = [256,512,1024,2048,4096,8192]
+name = "cos"
+
+for s in SR:
+    fout = open(folder+name+str(s)+"_int8.h","w")
+    
+    write_header(fout,s,name)
+    
+    t = np.linspace(0,2*np.pi,num=s,endpoint=False)
+    outstring=""
+    for i in range(s):
+        outstring+=str(round(-127*np.cos(t[i])))+", "
+        
+    outstring = textwrap.fill(outstring,80)
+    fout.write(outstring)
+    write_footer(fout,s,name)
+    fout.close()
+
+    print("Wrote:"+name.upper()+str(s)+"_INT8")
+
+
+#### COSPHASE
+
+SR = [256,2048,8192]
+name = "cosphase"
+
+for s in SR:
+    fout = open(folder+name+str(s)+"_int8.h","w")
+    
+    write_header(fout,s,name)
+    
+    t = np.linspace(0,2*np.pi,num=s,endpoint=False)
+    outstring=""
+    for i in range(s):
+        outstring+=str(round(127*np.cos(t[i])))+", "
+        
+    outstring = textwrap.fill(outstring,80)
+    fout.write(outstring)
+    write_footer(fout,s,name)
+    fout.close()
+
+    print("Wrote:"+name.upper()+str(s)+"_INT8")
+
+
+
+
+#### TRIANGLE
+
+SR = [512,1024,2048]
+name = "triangle"
+
+for s in SR:
+    fout = open(folder+name+str(s)+"_int8.h","w")
+    
+    write_header(fout,s,name)
+    
+    t = np.linspace(0,2*np.pi,num=s,endpoint=False)
+    outstring=""
+    for i in range(s):
+        if (i<=s/4):
+            outstring+=str(round(i*127./s*4))+", "
+        elif (i<=s*3/4):
+            outstring+=str(round(127-(i-s/4)*(127*2)/(s/2)))+", "
+        else:
+            outstring+=str(round(-127.+127.*(i-s*3/4)/s*4))+", "
+        
+    outstring = textwrap.fill(outstring,80)
+    fout.write(outstring)
+    write_footer(fout,s,name)
+    fout.close()
+
+    print("Wrote:"+name.upper()+str(s)+"_INT8")
+
+
+
+
+    
+#### SAW
+
+SR = [256,512,1024,2048,4096,8192]
+name = "saw"
+
+for s in SR:
+    fout = open(folder+name+str(s)+"_int8.h","w")
+    
+    write_header(fout,s,name)
+    
+    t = np.linspace(0,2*np.pi,num=s,endpoint=False)
+    outstring=""
+    for i in range(s):
+        outstring+=str(str(round(-127+127*2.*i/(s-1)))+", ")
+        
+    outstring = textwrap.fill(outstring,80)
+    fout.write(outstring)
+    write_footer(fout,s,name)
+    fout.close()
+
+    print("Wrote:"+name.upper()+str(s)+"_INT8")