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Add optional arguments to adjust timescale and extra percussion channels

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This commit is contained in:
Dave Schmenk 2017-11-08 09:57:15 -08:00
parent bf5fd4fafa
commit f676ae7d31
1 changed files with 27 additions and 11 deletions
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38
Platform/Apple/tools/ConvertMidi/cvtmid.py
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@ -4,17 +4,31 @@ import sys
#from mido import MidiFile
import mido
mid = mido.MidiFile(sys.argv[1])
timescale = 16.0
optarg = 1
timescale = 16.0 # Scale time to 16th of a second
extperchan = 9 # Default to standard MIDI channel 10 for extra percussion
if len(sys.argv) == 1:
print 'Usage:', sys.argv[0], '[-p extra_percussion_channel] [-t timescale] MIDI_file'
sys.exit(0)
# Parse optional arguments
while optarg < (len(sys.argv) - 1):
if sys.argv[optarg] == '-t': # Override tempo percentage
timescale = float(sys.argv[optarg + 1]) * 16.0
optarg += 2
if sys.argv[optarg] == '-p': # Add extra percussion channel
extperchan = int(sys.argv[optarg + 1]) - 1
optarg += 2
mid = mido.MidiFile(sys.argv[optarg])
timeshift = timescale
totaltime = 0
eventtime = 0.0
for msg in mid:
eventtime += msg.time * timescale
eventtime += msg.time * timeshift
#print '; time = ', msg.time
if msg.type == 'note_on' or msg.type == 'note_off':
if eventtime > 0.0 and eventtime < 0.5:
eventtime = 0.5
deltatime = int(eventtime + 0.5)
#if eventtime > 0.0 and eventtime < 0.5:
# eventtime = 0.5
deltatime = int(round(eventtime))
octave = int(msg.note / 12 - 1)
onote = int(msg.note % 12)
lrchan = int(msg.channel & 1)
@ -26,23 +40,25 @@ for msg in mid:
if octave < 0:
octave = 0
totaltime += deltatime
if msg.channel == 9 or msg.channel == 8:
if msg.channel == 9 or msg.channel == extperchan:
#
# Percussion
#
if vol > 0:
print '\t!BYTE\t${0:02X}, ${1:02X}, ${2:02X}\t; Percussion {3:d} Chan {4:d} Dur {5:d}'.format(deltatime, msg.note ^ 0x40, (lrchan << 7) | vol, msg.note, msg.channel, vol)
print '\t!BYTE\t${0:02X}, ${1:02X}, ${2:02X}\t; Percussion {3:d} Chan {4:d} Dur {5:d}'.format(deltatime, msg.note ^ 0x40, (lrchan << 7) | vol, msg.note, msg.channel + 1, vol)
if extperchan == 9: # Play percussion on both channels if no extended percussion
print '\t!BYTE\t${0:02X}, ${1:02X}, ${2:02X}\t; Percussion {3:d} Chan {4:d} Dur {5:d}'.format(0, msg.note ^ 0x40, vol, msg.note, msg.channel + 1, vol)
eventtime = 0.0
else:
#
# Note
#
print '\t!BYTE\t${0:02X}, ${1:02X}, ${2:02X}\t; Note {3:d} Chan {4:d} Vol {5:d}'.format(deltatime, 0x80 | (octave << 4) | onote, (lrchan << 7) | vol, msg.note, msg.channel, vol)
print '\t!BYTE\t${0:02X}, ${1:02X}, ${2:02X}\t; Note {3:d} Chan {4:d} Vol {5:d}'.format(deltatime, 0x80 | (octave << 4) | onote, (lrchan << 7) | vol, msg.note, msg.channel + 1, vol)
eventtime = 0.0
elif msg.type == 'set_tempo':
pass
timescale = msg.tempo / 500000.0 * 16.0
print '; timescale = ', timescale
#timeshift = msg.tempo / 500000.0 * timescale
#print '; timescale = ', timescale
elif msg.type == 'time_signature':
pass
elif msg.type == 'control_chage':