From c09ff65f79b1c243efab0ed67b90b20ee50c44b5 Mon Sep 17 00:00:00 2001
From: Thomas Kolb <thomas@tkolb.de>
Date: Wed, 21 Nov 2012 22:07:23 +0100
Subject: [PATCH] Start counting from 0 in LUT generator

---
 gen_lut.py | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/gen_lut.py b/gen_lut.py
index 531004d..4109cb0 100755
--- a/gen_lut.py
+++ b/gen_lut.py
@@ -30,7 +30,7 @@ with open("lut.c", "w") as ofile:
   ofile.write(preamble)
 
   # generate the sin() lookup table
-  for layer in range(1, fft_exponent+1):
+  for layer in range(0, fft_exponent):
     num_elements = (1 << layer)
     ofile.write("value_type sin_lut%i[%i] = {" % (layer, num_elements))
 
@@ -41,27 +41,27 @@ with open("lut.c", "w") as ofile:
 
     ofile.write("};\n\n")
 
-  ofile.write("value_type *sin_lut[%i] = {sin_lut1" % fft_exponent);
+  ofile.write("value_type *sin_lut[%i] = {sin_lut0" % fft_exponent);
 
-  for i in range(2, fft_exponent+1):
+  for i in range(1, fft_exponent):
     ofile.write(", sin_lut" + str(i));
   ofile.write("};\n");
 
   # generate the cos() lookup table
-  for layer in range(1, fft_exponent+1):
+  for layer in range(0, fft_exponent):
     num_elements = (1 << layer)
     ofile.write("value_type cos_lut%i[%i] = {" % (layer, num_elements))
 
-    ofile.write("0")
+    ofile.write("1")
 
     for element in range(1, num_elements):
       ofile.write(", %.10f" % cos(-pi * element / num_elements));
 
     ofile.write("};\n\n")
 
-  ofile.write("value_type *cos_lut[%i] = {cos_lut1" % fft_exponent);
+  ofile.write("value_type *cos_lut[%i] = {cos_lut0" % fft_exponent);
 
-  for i in range(2, fft_exponent+1):
+  for i in range(1, fft_exponent):
     ofile.write(", cos_lut" + str(i));
   ofile.write("};\n");