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# mdefine.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>
This class is used to parse lines of MDEFINE and stores
the sequences for later recall.
"""
import MMA.midiC
import MMA.midiM
from . import gbl
from MMA.common import *
def mdefine(ln):
""" Set a midi seq pattern. """
if not ln:
error("MDefine needs arguments")
name = ln[0]
if name.startswith('_'):
error("Names with a leading underscore are reserved")
if name.upper() == 'Z':
error("The name 'Z' is reserved")
mdef.create(name, ' '.join(ln[1:]))
def trackMdefine(name, ln):
""" Set a midi seq pattern. Ignore track name."""
mdefine(ln)
class Mdefine:
def __init__(self):
self.defs = {}
def get(self, name):
""" Return a predefined MIDI pattern."""
try:
return self.defs[name]
except:
error("The MDEFINE pattern %s has not been defined" % name)
def create(self, name, ln):
""" Parse a MDEFINE line.
The line must be in the form:
NAME <beat> <ctrl> <dat> [; ...]
"""
name = name.upper()
ln = ln.rstrip('; ') # dump trailing ';' and whitespace
ln = ln.split(';')
evs = []
for l in ln:
l = l.split()
if len(l) == 1:
evs.extend(self.get(l[0].upper()))
continue
if len(l) != 3:
error("MDEFINE sequence must have 3 values: Beat, Ctrl, Datum")
off = stof(l[0], "Value for offset must be integer/float")
c = MMA.midiC.ctrlToValue(l[1])
if c < 0:
c = stoi(l[1])
if c < 0 or c > 0x7f:
error("Controller values must be 0x00 to 0x7f")
d = stoi(l[2])
if d < 0 or d > 0x7f:
error("MIDI Control Datum value must be 0x00 to 0x7f")
evs.append([off, MMA.midiM.packBytes(c, d)])
self.defs[name] = evs
mdef = Mdefine()
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