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# MMAalloc.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 <bvdp@uniserve.com>
"""
import MMApatChord
import MMApatWalk
import MMApatBass
import MMApatDrum
import MMApatScale
import MMApatArpeggio
import MMApatSolo
import MMAglobals; gbl = MMAglobals
from MMAcommon import *
def trackAlloc(name, err):
""" Check existence of track and create if possible.
Needs to be in this module so we can determine the different
class names (they are not known anywhere else).
If 'err' is set, the function will 'error out' if
it's not possible to create the track. Otherwise,
it is content to return without creation taking place.
"""
# If the track already exists, just return
if name in gbl.tnames:
return
trackClass = None
ext = None
base = name
""" Loop though the valid track names. We're trying to
get the TYPE from the name. The name can be either
1. The name of the base track (ie: BASS)
2. Base track plus a '-' and string (ie: BASS-SUS)
"""
if name.count('-'):
base, ext = name.split('-',1)
for f,n in (
(MMApatBass.Bass, 'BASS' ),
(MMApatChord.Chord, 'CHORD' ),
(MMApatArpeggio.Arpeggio, 'ARPEGGIO' ),
(MMApatScale.Scale, 'SCALE' ),
(MMApatDrum.Drum, 'DRUM' ),
(MMApatWalk.Walk, 'WALK' ),
(MMApatSolo.Melody, 'MELODY' ),
(MMApatSolo.Solo, 'SOLO' )
):
if base == n:
trackClass = f
break
""" If we did not set 'trackClass' then the name is not valid
and we obviously can't create the track. Error out or return...
"""
if not trackClass:
if err:
error("There is no track class '%s' for trackname '%s'" % \
(base, name))
else:
return
# Now attempt to allocate the track
gbl.tnames[name]=f(name)
newtk=gbl.tnames[name]
# Update current grooves to reflect new track.
for slot in gbl.settingsGroove.keys():
newtk.saveGroove(slot)
# Set the sequence size of new track
newtk.setSeqSize()
if gbl.debug:
print "Creating new track", name
return
|
