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# patScale.py
"""
This module is an integeral part of the program
MMA - Musical Midi Accompaniment.
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Bob van der Poel <bob@mellowood.ca>
"""
import random
import MMA.harmony
import MMA.notelen
import MMA.ornament
from MMA.pat import PC, Pgroup
from . import gbl
from MMA.common import *
import MMA.debug
import copy
class Scale(PC):
""" Pattern class for a Scale track. """
vtype = 'SCALE'
lastNote = -1
lastChord = None
lastStype = None
lastDirect = 1
lastRange = 0
sOffset = 0
notes = None
dirfact = 1
def __init__(self, ln):
PC.__init__(self, ln)
def saveGroove(self, gname):
""" Save special/local variables for groove. """
PC.saveGroove(self, gname) # create storage. Do this 1st.
def restoreGroove(self, gname):
""" Restore special/local/variables for groove. """
PC.restoreGroove(self, gname)
def getPgroup(self, ev):
""" Get group for scale patterns.
Fields - start, length, volume
"""
if len(ev) != 3:
error("There must be at exactly 3 items in each group "
"in a Scale definition, not <%s>." % ' '.join(ev))
a = Pgroup()
a.offset = self.setBarOffset(ev[0])
a.duration = MMA.notelen.getNoteLen(ev[1])
a.vol = stoi(ev[2], "Type error in Scale definition")
return a
def setScaletype(self, ln):
""" Set scale type. """
ln = lnExpand(ln, "%s ScaleType" % self.name)
tmp = []
for n in ln:
n = n.upper()
if not n in ( 'CHROMATIC', 'SCALE', 'AUTO', 'CHORD'):
error("%s Scaletype: Only Chromatic, Scale, Auto and "
"Chord are valid, not '%s'" % (self.name, n))
tmp.append(n)
self.scaleType = seqBump(tmp)
if MMA.debug.debug:
dPrint("Set %s ScaleType to: %s" %
(self.name, ' '.join(self.scaleType)))
def restart(self):
self.ssvoice = -1
self.lastNote = -1
self.lastChord = None
self.lastStype = None
self.lastDirect = 1
self.lastRange = 0
self.sOffset = 0
self.notes = None
self.dirfact = 1
def trackBar(self, pattern, ctable):
""" Do a scale bar.
Called from self.bar()
"""
sc = self.seq
direct = self.direction[sc]
# If the range or direction has changed, we just start
# with a new scale.
t = self.chordRange[sc]
if t != self.lastRange:
self.lastRange = t
self.lastChord = None
if self.lastDirect != direct:
self.lastDirect = direct
self.lastChord = None
for p in pattern:
tb = self.getChordInPos(p.offset, ctable)
if tb.scaleZ:
continue
thisChord = tb.chord.tonic + tb.chord.chordType
stype = self.scaleType[sc]
if thisChord != self.lastChord or stype != self.lastStype:
self.lastChord = thisChord
self.lastStype = stype
if stype == 'CHROMATIC':
notelist = [ tb.chord.rootNote + x for x in range(0,12)]
elif stype == 'CHORD':
notelist = tb.chord.noteList[:]
else:
notelist = list(tb.chord.scaleList)
""" Get the current scale and append enuf copies
together for RANGE setting. If Range happens
to be 0 or 1 we end up with a single copy.
"""
ln=self.chordRange[sc] # RANGE 1...x (def. == 1)
o=0
self.notes = []
while ln >= 1:
for a in notelist:
self.notes.append(a+o)
o+=12
ln-=1
if ln>0 and ln<1: # for fractional scale lengths
ln = int(len(notelist) * ln)
if ln < 2: # important, must be at least 2 notes in a scale
ln=2
for a in notelist[:ln]:
self.notes.append(a+o)
if direct == 'DOWN':
self.dirfact = -1
if self.lastNote == -1:
self.sOffset = len(self.notes)-1
else:
self.sOffset = 0
self.dirfact = 1
if self.lastNote > -1:
if self.lastNote in self.notes:
self.sOffset = self.notes.index(self.lastNote)
else:
self.sOffset=len(self.notes)-1
for i, a in enumerate(self.notes):
if a>self.lastNote:
self.sOffset = i
break
# Keep offset into note list in range
# only > end of list if BOTH or UP
if self.sOffset >= len(self.notes):
if direct == 'BOTH':
self.dirfact = -1
self.sOffset = len(self.notes)-2
else: ## UP
self.sOffset = 0
# only < start of list if DOWN or BOTH
elif self.sOffset < 0:
if direct == 'BOTH':
self.dirfact = 1
self.sOffset = 1
else: ## DOWN
self.sOffset = len(self.notes)-1
if direct == 'RANDOM':
note = random.choice(self.notes)
else:
note = self.notes[self.sOffset]
self.sOffset += self.dirfact
self.lastNote = note
duration = p.duration
vol = p.vol
offset = p.offset
if not self.harmonyOnly[sc]:
nlist = [(note, p.vol)]
else:
nlist = []
if self.harmony[sc]:
ch = self.getChordInPos(p.offset, ctable).chord.noteList
h = MMA.harmony.harmonize(self.harmony[sc], note, ch)
harmlist = list(zip(h, [p.vol * self.harmonyVolume[sc]] * len(h)))
else:
harmlist = []
offset = p.offset
if self.ornaments['type']:
offset = MMA.ornament.doOrnament(self, nlist,
self.getChordInPos(offset, ctable).chord.scaleList, p)
nlist = []
self.sendChord(nlist+harmlist, p.duration, offset)
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