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127 lines
2.8 KiB
Python
127 lines
2.8 KiB
Python
# midiC.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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This module contains interface for MIDI constants and conversion routines.
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"""
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from MMA.common import *
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from MMA.miditables import *
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def voice2tup(x):
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""" Convert integer into 3 byte tuple: Voice, LSB, MSB. """
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if x>0xffff:
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msb = x >> 16
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x &= 0xffff
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else:
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msb = 0
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if x>0xff:
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lsb = x >> 8
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x &= 0xff
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else:
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lsb = 0
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return (x, lsb, msb)
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def extVocStr(v):
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v = "%s.%s.%s" % voice2tup(v)
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if v[-2:] == '.0':
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v=v[:-2]
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if v[-2:] == '.0':
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v=v[:-2]
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return v
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###############################
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def drumToValue(name):
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""" Get the value of the drum tone (-1==error).
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Note that this is quite different from instToValue() ... in that
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case the caller does a bunch of validation stuff for controllers, etc.
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"""
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try: # assuming that 'name' is an integer
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i = int(name, 0)
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if i>=0 and i<=127:
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return int(name)
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else:
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return -1
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except:
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try:
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return drumInx[ name.upper() ]
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except KeyError:
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return -1
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def valueToDrum(val):
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""" Get the name of the drum tone. """
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try:
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return drumNames[val]
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except KeyError:
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return str(val)
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def instToValue(name):
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""" Get the value of the instrument name (-1==error). """
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try:
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return voiceInx[name.upper()]
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except KeyError:
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return -1
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def valueToInst(val):
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""" Get the name of the inst. (or 'ERR'). """
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try:
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return voiceNames[val]
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except KeyError:
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try:
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int(val)
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except:
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return "ERROR"
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return extVocStr(val)
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def ctrlToValue(name):
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""" Get the value of the controler name (-1==error). """
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try:
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return ctrlInx[name.upper()]
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except keyError:
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return -1
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def valueToCtrl(val):
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""" Get the name of the controller (or 'ERR'). """
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try:
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return ctrlNames[val]
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except KeyError:
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return "ERROR"
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