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89 lines
2.0 KiB
Python
89 lines
2.0 KiB
Python
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# mdefine.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 <bvdp@xplornet.com>
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This class is used to parse lines of MDEFINE and stores
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the sequences for later recall.
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"""
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import gbl
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from MMA.common import *
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import MMA.midiC
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class Mdefine:
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def __init__(self):
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self.defs = {}
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def get(self, name):
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""" Return a predefine MIDI pattern."""
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try:
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return self.defs[name]
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except:
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error("The MDEFINE pattern %s has not been defined." % name)
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def set(self, name, ln):
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""" Parse a MDEFINE line.
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The line must be in the form:
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NAME <beat> <ctrl> <dat> [; ...]
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"""
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name = name.upper()
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ln=ln.rstrip('; ') # dump trailing ';' and whitespace
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ln = ln.split(';')
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evs = []
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for l in ln:
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l=l.split()
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if len(l) == 1:
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evs.extend( self.get(l[0].upper() ))
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continue
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if len(l) != 3:
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error("MDEFINE sequence must have 3 values: Beat, Ctrl, Datum")
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off=stof(l[0], "Value for offset must be integer/float")
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c=MMA.midiC.ctrlToValue(l[1])
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if c < 0:
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c=stoi(l[1])
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if c < 0 or c > 0x7f:
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error("Controller values must be 0x00 to 0x7f.")
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d=stoi(l[2])
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if d < 0 or d > 0x7f:
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error("MIDI Control Datum value must be 0x00 to 0x7f.")
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evs.append( [off, chr(c) + chr(d)])
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self.defs[name]=evs
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mdef = Mdefine()
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