moving trunk for module inkscape

(bzr r1)

1 files changed, 73 insertions, 0 deletions

diff --git a/share/extensions/ffscale.py b/share/extensions/ffscale.py
new file mode 100755
index 000000000..f9afa0b02
--- /dev/null
+++ b/share/extensions/ffscale.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python
+'''
+    Copyright (C) 2004 Aaron Cyril Spike
+
+    This file is part of FretFind 2-D.
+
+    FretFind 2-D is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    FretFind 2-D is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with FretFind 2-D; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+'''
+import math
+
+def ETScale(tones, octave=2.0):
+	octave, tones = float(octave), float(tones)
+	scale = {'steps':[[1.0,1.0]], 'title':'', 'errors':0, 'errorstring':''}
+	if not tones:
+		scale['errors'] += 1
+		scale['errorstring'] = 'Error: Number of tones must be non zero!'
+	else:	
+		ratio = octave**(1/tones)
+		scale['title'] = '%s root of %s Equal Temperament' % (tones, octave)
+		scale['steps'].append([ratio,1])
+	return scale
+
+def ScalaScale(scala):
+	#initial step 0 or 1/1 is implicit
+	scale = {'steps':[[1.0,1.0]], 'title':'', 'errors':0, 'errorstring':''}
+
+	#split scale discarding commments
+	lines = [l.strip() for l in scala.strip().splitlines() if not l.strip().startswith('!')]
+
+	#first line may be blank and contains the title
+	scale['title'] =  lines.pop(0)
+
+	#second line indicates the number of note lines that should follow
+	expected = int(lines.pop(0))
+
+	#discard blank lines and anything following whitespace	
+	lines = [l.split()[0] for l in lines if l != '']
+	
+	if len(lines) != expected:
+		scale['errors'] += 1
+		scale['errorstring'] = 'Error: expected %s more tones but found %s!' % (expected,len(lines))
+	else:
+		for l in lines:
+			#interpret anyline containing a dot as cents
+			if l.find('.') >= 0:
+				num = 2**(float(l)/1200)
+				denom = 1
+			#everything else is a ratio
+			elif l.find('/') >=0:
+				l = l.split('/')
+				num = float(int(l[0]))
+				denom = float(int(l[1]))
+			else:
+				num = float(int(l))
+				denom = 1.0
+			scale['steps'].append([num,denom])
+			
+			if (num < 0) ^ (denom <= 0):
+				scale['errors'] += 1
+				scale['errorstring'] += 'Error at "'+l+'": Negative and undefined ratios are not allowed!\n'
+	return scale