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115 lines
2.5 KiB
Python
115 lines
2.5 KiB
Python
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# patDrum.py
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"""
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This module is an integeral part of the program
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MMA - Musical Midi Accompaniment.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Bob van der Poel <bob@mellowood.ca>
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"""
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import gbl
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from MMA.common import *
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from MMA.notelen import getNoteLen
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import MMA.translate
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from MMA.pat import PC, seqBump
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class Drum(PC):
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""" Pattern class for a drum track. """
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vtype = 'DRUM'
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toneList = [38]
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def __init__(self, ln):
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""" init for drum track. """
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PC.__init__(self, ln)
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self.setChannel('10')
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if not gbl.mtrks[self.channel].trackname:
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gbl.mtrks[self.channel].addTrkName(0, 'Drum')
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def setTone(self, ln):
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""" Set a tone list. Only valid for DRUMs.
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ln[] is not nesc. the right length.
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"""
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ln=self.lnExpand(ln, 'Tone')
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tmp = []
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for n in ln:
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tmp.append(MMA.translate.dtable.get(n))
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self.toneList = seqBump( tmp )
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def restart(self):
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self.ssvoice = -1
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def getPgroup(self, ev):
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""" Get group for a drum pattern.
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Fields - start, length, volume
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"""
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if len(ev) != 3:
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error("There must be at exactly 3 items in each "
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"group of a drum define, not <%s>" % ' '.join(ev) )
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a = struct()
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a.offset = self.setBarOffset(ev[0])
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a.duration = getNoteLen(ev[1])
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a.vol = stoi(ev[2], "Type error in Drum volume")
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return a
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def trackBar(self, pattern, ctable):
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""" Do a drum bar.
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Called from self.bar()
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"""
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sc = self.seq
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for p in pattern:
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tb = self.getChordInPos(p.offset, ctable)
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if tb.drumZ:
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continue
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self.sendNote(
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p.offset,
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self.getDur(p.duration),
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self.toneList[sc],
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self.adjustVolume(p.vol, p.offset) )
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