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TMIDIX.py
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TMIDIX.py
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#! /usr/bin/python3
r'''###############################################################################
###################################################################################
#
#
# Tegridy MIDI X Module (TMIDI X / tee-midi eks)
# Version 1.0
#
# NOTE: TMIDI X Module starts after the partial MIDI.py module @ line 1342
#
# Based upon MIDI.py module v.6.7. by Peter Billam / pjb.com.au
#
# Project Los Angeles
#
# Tegridy Code 2021
#
# https://github.com/Tegridy-Code/Project-Los-Angeles
#
#
###################################################################################
###################################################################################
# Copyright 2021 Project Los Angeles / Tegridy Code
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
###################################################################################
###################################################################################
#
# PARTIAL MIDI.py Module v.6.7. by Peter Billam
# Please see TMIDI 2.3/tegridy-tools repo for full MIDI.py module code
#
# Or you can always download the latest full version from:
#
# https://pjb.com.au/
# https://peterbillam.gitlab.io/miditools/
#
# Copyright 2020 Peter Billam
#
###################################################################################
###################################################################################'''
import sys, struct, copy
Version = '6.7'
VersionDate = '20201120'
_previous_warning = '' # 5.4
_previous_times = 0 # 5.4
#------------------------------- Encoding stuff --------------------------
def opus2midi(opus=[], text_encoding='ISO-8859-1'):
r'''The argument is a list: the first item in the list is the "ticks"
parameter, the others are the tracks. Each track is a list
of midi-events, and each event is itself a list; see above.
opus2midi() returns a bytestring of the MIDI, which can then be
written either to a file opened in binary mode (mode='wb'),
or to stdout by means of: sys.stdout.buffer.write()
my_opus = [
96,
[ # track 0:
['patch_change', 0, 1, 8], # and these are the events...
['note_on', 5, 1, 25, 96],
['note_off', 96, 1, 25, 0],
['note_on', 0, 1, 29, 96],
['note_off', 96, 1, 29, 0],
], # end of track 0
]
my_midi = opus2midi(my_opus)
sys.stdout.buffer.write(my_midi)
'''
if len(opus) < 2:
opus=[1000, [],]
tracks = copy.deepcopy(opus)
ticks = int(tracks.pop(0))
ntracks = len(tracks)
if ntracks == 1:
format = 0
else:
format = 1
my_midi = b"MThd\x00\x00\x00\x06"+struct.pack('>HHH',format,ntracks,ticks)
for track in tracks:
events = _encode(track, text_encoding=text_encoding)
my_midi += b'MTrk' + struct.pack('>I',len(events)) + events
_clean_up_warnings()
return my_midi
def score2opus(score=None, text_encoding='ISO-8859-1'):
r'''
The argument is a list: the first item in the list is the "ticks"
parameter, the others are the tracks. Each track is a list
of score-events, and each event is itself a list. A score-event
is similar to an opus-event (see above), except that in a score:
1) the times are expressed as an absolute number of ticks
from the track's start time
2) the pairs of 'note_on' and 'note_off' events in an "opus"
are abstracted into a single 'note' event in a "score":
['note', start_time, duration, channel, pitch, velocity]
score2opus() returns a list specifying the equivalent "opus".
my_score = [
96,
[ # track 0:
['patch_change', 0, 1, 8],
['note', 5, 96, 1, 25, 96],
['note', 101, 96, 1, 29, 96]
], # end of track 0
]
my_opus = score2opus(my_score)
'''
if len(score) < 2:
score=[1000, [],]
tracks = copy.deepcopy(score)
ticks = int(tracks.pop(0))
opus_tracks = []
for scoretrack in tracks:
time2events = dict([])
for scoreevent in scoretrack:
if scoreevent[0] == 'note':
note_on_event = ['note_on',scoreevent[1],
scoreevent[3],scoreevent[4],scoreevent[5]]
note_off_event = ['note_off',scoreevent[1]+scoreevent[2],
scoreevent[3],scoreevent[4],scoreevent[5]]
if time2events.get(note_on_event[1]):
time2events[note_on_event[1]].append(note_on_event)
else:
time2events[note_on_event[1]] = [note_on_event,]
if time2events.get(note_off_event[1]):
time2events[note_off_event[1]].append(note_off_event)
else:
time2events[note_off_event[1]] = [note_off_event,]
continue
if time2events.get(scoreevent[1]):
time2events[scoreevent[1]].append(scoreevent)
else:
time2events[scoreevent[1]] = [scoreevent,]
sorted_times = [] # list of keys
for k in time2events.keys():
sorted_times.append(k)
sorted_times.sort()
sorted_events = [] # once-flattened list of values sorted by key
for time in sorted_times:
sorted_events.extend(time2events[time])
abs_time = 0
for event in sorted_events: # convert abs times => delta times
delta_time = event[1] - abs_time
abs_time = event[1]
event[1] = delta_time
opus_tracks.append(sorted_events)
opus_tracks.insert(0,ticks)
_clean_up_warnings()
return opus_tracks
def score2midi(score=None, text_encoding='ISO-8859-1'):
r'''
Translates a "score" into MIDI, using score2opus() then opus2midi()
'''
return opus2midi(score2opus(score, text_encoding), text_encoding)
#--------------------------- Decoding stuff ------------------------
def midi2opus(midi=b'', do_not_check_MIDI_signature=False):
r'''Translates MIDI into a "opus". For a description of the
"opus" format, see opus2midi()
'''
my_midi=bytearray(midi)
if len(my_midi) < 4:
_clean_up_warnings()
return [1000,[],]
id = bytes(my_midi[0:4])
if id != b'MThd':
_warn("midi2opus: midi starts with "+str(id)+" instead of 'MThd'")
_clean_up_warnings()
if do_not_check_MIDI_signature == False:
return [1000,[],]
[length, format, tracks_expected, ticks] = struct.unpack(
'>IHHH', bytes(my_midi[4:14]))
if length != 6:
_warn("midi2opus: midi header length was "+str(length)+" instead of 6")
_clean_up_warnings()
return [1000,[],]
my_opus = [ticks,]
my_midi = my_midi[14:]
track_num = 1 # 5.1
while len(my_midi) >= 8:
track_type = bytes(my_midi[0:4])
if track_type != b'MTrk':
#_warn('midi2opus: Warning: track #'+str(track_num)+' type is '+str(track_type)+" instead of b'MTrk'")
pass
[track_length] = struct.unpack('>I', my_midi[4:8])
my_midi = my_midi[8:]
if track_length > len(my_midi):
_warn('midi2opus: track #'+str(track_num)+' length '+str(track_length)+' is too large')
_clean_up_warnings()
return my_opus # 5.0
my_midi_track = my_midi[0:track_length]
my_track = _decode(my_midi_track)
my_opus.append(my_track)
my_midi = my_midi[track_length:]
track_num += 1 # 5.1
_clean_up_warnings()
return my_opus
def opus2score(opus=[]):
r'''For a description of the "opus" and "score" formats,
see opus2midi() and score2opus().
'''
if len(opus) < 2:
_clean_up_warnings()
return [1000,[],]
tracks = copy.deepcopy(opus) # couple of slices probably quicker...
ticks = int(tracks.pop(0))
score = [ticks,]
for opus_track in tracks:
ticks_so_far = 0
score_track = []
chapitch2note_on_events = dict([]) # 4.0
for opus_event in opus_track:
ticks_so_far += opus_event[1]
if opus_event[0] == 'note_off' or (opus_event[0] == 'note_on' and opus_event[4] == 0): # 4.8
cha = opus_event[2]
pitch = opus_event[3]
key = cha*128 + pitch
if chapitch2note_on_events.get(key):
new_event = chapitch2note_on_events[key].pop(0)
new_event[2] = ticks_so_far - new_event[1]
score_track.append(new_event)
elif pitch > 127:
pass #_warn('opus2score: note_off with no note_on, bad pitch='+str(pitch))
else:
pass #_warn('opus2score: note_off with no note_on cha='+str(cha)+' pitch='+str(pitch))
elif opus_event[0] == 'note_on':
cha = opus_event[2]
pitch = opus_event[3]
key = cha*128 + pitch
new_event = ['note',ticks_so_far,0,cha,pitch, opus_event[4]]
if chapitch2note_on_events.get(key):
chapitch2note_on_events[key].append(new_event)
else:
chapitch2note_on_events[key] = [new_event,]
else:
opus_event[1] = ticks_so_far
score_track.append(opus_event)
# check for unterminated notes (Oisín) -- 5.2
for chapitch in chapitch2note_on_events:
note_on_events = chapitch2note_on_events[chapitch]
for new_e in note_on_events:
new_e[2] = ticks_so_far - new_e[1]
score_track.append(new_e)
pass #_warn("opus2score: note_on with no note_off cha="+str(new_e[3])+' pitch='+str(new_e[4])+'; adding note_off at end')
score.append(score_track)
_clean_up_warnings()
return score
def midi2score(midi=b'', do_not_check_MIDI_signature=False):
r'''
Translates MIDI into a "score", using midi2opus() then opus2score()
'''
return opus2score(midi2opus(midi, do_not_check_MIDI_signature))
def midi2ms_score(midi=b'', do_not_check_MIDI_signature=False):
r'''
Translates MIDI into a "score" with one beat per second and one
tick per millisecond, using midi2opus() then to_millisecs()
then opus2score()
'''
return opus2score(to_millisecs(midi2opus(midi, do_not_check_MIDI_signature)))
def midi2single_track_ms_score(midi_path_or_bytes,
recalculate_channels = False,
pass_old_timings_events= False,
verbose = False,
do_not_check_MIDI_signature=False
):
r'''
Translates MIDI into a single track "score" with 16 instruments and one beat per second and one
tick per millisecond
'''
if type(midi_path_or_bytes) == bytes:
midi_data = midi_path_or_bytes
elif type(midi_path_or_bytes) == str:
midi_data = open(midi_path_or_bytes, 'rb').read()
score = midi2score(midi_data, do_not_check_MIDI_signature)
if recalculate_channels:
events_matrixes = []
itrack = 1
events_matrixes_channels = []
while itrack < len(score):
events_matrix = []
for event in score[itrack]:
if event[0] == 'note' and event[3] != 9:
event[3] = (16 * (itrack-1)) + event[3]
if event[3] not in events_matrixes_channels:
events_matrixes_channels.append(event[3])
events_matrix.append(event)
events_matrixes.append(events_matrix)
itrack += 1
events_matrix1 = []
for e in events_matrixes:
events_matrix1.extend(e)
if verbose:
if len(events_matrixes_channels) > 16:
print('MIDI has', len(events_matrixes_channels), 'instruments!', len(events_matrixes_channels) - 16, 'instrument(s) will be removed!')
for e in events_matrix1:
if e[0] == 'note' and e[3] != 9:
if e[3] in events_matrixes_channels[:15]:
if events_matrixes_channels[:15].index(e[3]) < 9:
e[3] = events_matrixes_channels[:15].index(e[3])
else:
e[3] = events_matrixes_channels[:15].index(e[3])+1
else:
events_matrix1.remove(e)
if e[0] in ['patch_change', 'control_change', 'channel_after_touch', 'key_after_touch', 'pitch_wheel_change'] and e[2] != 9:
if e[2] in [e % 16 for e in events_matrixes_channels[:15]]:
if [e % 16 for e in events_matrixes_channels[:15]].index(e[2]) < 9:
e[2] = [e % 16 for e in events_matrixes_channels[:15]].index(e[2])
else:
e[2] = [e % 16 for e in events_matrixes_channels[:15]].index(e[2])+1
else:
events_matrix1.remove(e)
else:
events_matrix1 = []
itrack = 1
while itrack < len(score):
for event in score[itrack]:
events_matrix1.append(event)
itrack += 1
opus = score2opus([score[0], events_matrix1])
ms_score = opus2score(to_millisecs(opus, pass_old_timings_events=pass_old_timings_events))
return ms_score
#------------------------ Other Transformations ---------------------
def to_millisecs(old_opus=None, desired_time_in_ms=1, pass_old_timings_events = False):
r'''Recallibrates all the times in an "opus" to use one beat
per second and one tick per millisecond. This makes it
hard to retrieve any information about beats or barlines,
but it does make it easy to mix different scores together.
'''
if old_opus == None:
return [1000 * desired_time_in_ms,[],]
try:
old_tpq = int(old_opus[0])
except IndexError: # 5.0
_warn('to_millisecs: the opus '+str(type(old_opus))+' has no elements')
return [1000 * desired_time_in_ms,[],]
new_opus = [1000 * desired_time_in_ms,]
# 6.7 first go through building a table of set_tempos by absolute-tick
ticks2tempo = {}
itrack = 1
while itrack < len(old_opus):
ticks_so_far = 0
for old_event in old_opus[itrack]:
if old_event[0] == 'note':
raise TypeError('to_millisecs needs an opus, not a score')
ticks_so_far += old_event[1]
if old_event[0] == 'set_tempo':
ticks2tempo[ticks_so_far] = old_event[2]
itrack += 1
# then get the sorted-array of their keys
tempo_ticks = [] # list of keys
for k in ticks2tempo.keys():
tempo_ticks.append(k)
tempo_ticks.sort()
# then go through converting to millisec, testing if the next
# set_tempo lies before the next track-event, and using it if so.
itrack = 1
while itrack < len(old_opus):
ms_per_old_tick = 400 / old_tpq # float: will round later 6.3
i_tempo_ticks = 0
ticks_so_far = 0
ms_so_far = 0.0
previous_ms_so_far = 0.0
if pass_old_timings_events:
new_track = [['set_tempo',0,1000000 * desired_time_in_ms],['old_tpq', 0, old_tpq]] # new "crochet" is 1 sec
else:
new_track = [['set_tempo',0,1000000 * desired_time_in_ms],] # new "crochet" is 1 sec
for old_event in old_opus[itrack]:
# detect if ticks2tempo has something before this event
# 20160702 if ticks2tempo is at the same time, leave it
event_delta_ticks = old_event[1] * desired_time_in_ms
if (i_tempo_ticks < len(tempo_ticks) and
tempo_ticks[i_tempo_ticks] < (ticks_so_far + old_event[1]) * desired_time_in_ms):
delta_ticks = tempo_ticks[i_tempo_ticks] - ticks_so_far
ms_so_far += (ms_per_old_tick * delta_ticks * desired_time_in_ms)
ticks_so_far = tempo_ticks[i_tempo_ticks]
ms_per_old_tick = ticks2tempo[ticks_so_far] / (1000.0*old_tpq * desired_time_in_ms)
i_tempo_ticks += 1
event_delta_ticks -= delta_ticks
new_event = copy.deepcopy(old_event) # now handle the new event
ms_so_far += (ms_per_old_tick * old_event[1] * desired_time_in_ms)
new_event[1] = round(ms_so_far - previous_ms_so_far)
if pass_old_timings_events:
if old_event[0] != 'set_tempo':
previous_ms_so_far = ms_so_far
new_track.append(new_event)
else:
new_event[0] = 'old_set_tempo'
previous_ms_so_far = ms_so_far
new_track.append(new_event)
else:
if old_event[0] != 'set_tempo':
previous_ms_so_far = ms_so_far
new_track.append(new_event)
ticks_so_far += event_delta_ticks
new_opus.append(new_track)
itrack += 1
_clean_up_warnings()
return new_opus
def event2alsaseq(event=None): # 5.5
r'''Converts an event into the format needed by the alsaseq module,
http://pp.com.mx/python/alsaseq
The type of track (opus or score) is autodetected.
'''
pass
def grep(score=None, channels=None):
r'''Returns a "score" containing only the channels specified
'''
if score == None:
return [1000,[],]
ticks = score[0]
new_score = [ticks,]
if channels == None:
return new_score
channels = set(channels)
global Event2channelindex
itrack = 1
while itrack < len(score):
new_score.append([])
for event in score[itrack]:
channel_index = Event2channelindex.get(event[0], False)
if channel_index:
if event[channel_index] in channels:
new_score[itrack].append(event)
else:
new_score[itrack].append(event)
itrack += 1
return new_score
def play_score(score=None):
r'''Converts the "score" to midi, and feeds it into 'aplaymidi -'
'''
if score == None:
return
import subprocess
pipe = subprocess.Popen(['aplaymidi','-'], stdin=subprocess.PIPE)
if score_type(score) == 'opus':
pipe.stdin.write(opus2midi(score))
else:
pipe.stdin.write(score2midi(score))
pipe.stdin.close()
def score2stats(opus_or_score=None):
r'''Returns a dict of some basic stats about the score, like
bank_select (list of tuples (msb,lsb)),
channels_by_track (list of lists), channels_total (set),
general_midi_mode (list),
ntracks, nticks, patch_changes_by_track (list of dicts),
num_notes_by_channel (list of numbers),
patch_changes_total (set),
percussion (dict histogram of channel 9 events),
pitches (dict histogram of pitches on channels other than 9),
pitch_range_by_track (list, by track, of two-member-tuples),
pitch_range_sum (sum over tracks of the pitch_ranges),
'''
bank_select_msb = -1
bank_select_lsb = -1
bank_select = []
channels_by_track = []
channels_total = set([])
general_midi_mode = []
num_notes_by_channel = dict([])
patches_used_by_track = []
patches_used_total = set([])
patch_changes_by_track = []
patch_changes_total = set([])
percussion = dict([]) # histogram of channel 9 "pitches"
pitches = dict([]) # histogram of pitch-occurrences channels 0-8,10-15
pitch_range_sum = 0 # u pitch-ranges of each track
pitch_range_by_track = []
is_a_score = True
if opus_or_score == None:
return {'bank_select':[], 'channels_by_track':[], 'channels_total':[],
'general_midi_mode':[], 'ntracks':0, 'nticks':0,
'num_notes_by_channel':dict([]),
'patch_changes_by_track':[], 'patch_changes_total':[],
'percussion':{}, 'pitches':{}, 'pitch_range_by_track':[],
'ticks_per_quarter':0, 'pitch_range_sum':0}
ticks_per_quarter = opus_or_score[0]
i = 1 # ignore first element, which is ticks
nticks = 0
while i < len(opus_or_score):
highest_pitch = 0
lowest_pitch = 128
channels_this_track = set([])
patch_changes_this_track = dict({})
for event in opus_or_score[i]:
if event[0] == 'note':
num_notes_by_channel[event[3]] = num_notes_by_channel.get(event[3],0) + 1
if event[3] == 9:
percussion[event[4]] = percussion.get(event[4],0) + 1
else:
pitches[event[4]] = pitches.get(event[4],0) + 1
if event[4] > highest_pitch:
highest_pitch = event[4]
if event[4] < lowest_pitch:
lowest_pitch = event[4]
channels_this_track.add(event[3])
channels_total.add(event[3])
finish_time = event[1] + event[2]
if finish_time > nticks:
nticks = finish_time
elif event[0] == 'note_off' or (event[0] == 'note_on' and event[4] == 0): # 4.8
finish_time = event[1]
if finish_time > nticks:
nticks = finish_time
elif event[0] == 'note_on':
is_a_score = False
num_notes_by_channel[event[2]] = num_notes_by_channel.get(event[2],0) + 1
if event[2] == 9:
percussion[event[3]] = percussion.get(event[3],0) + 1
else:
pitches[event[3]] = pitches.get(event[3],0) + 1
if event[3] > highest_pitch:
highest_pitch = event[3]
if event[3] < lowest_pitch:
lowest_pitch = event[3]
channels_this_track.add(event[2])
channels_total.add(event[2])
elif event[0] == 'patch_change':
patch_changes_this_track[event[2]] = event[3]
patch_changes_total.add(event[3])
elif event[0] == 'control_change':
if event[3] == 0: # bank select MSB
bank_select_msb = event[4]
elif event[3] == 32: # bank select LSB
bank_select_lsb = event[4]
if bank_select_msb >= 0 and bank_select_lsb >= 0:
bank_select.append((bank_select_msb,bank_select_lsb))
bank_select_msb = -1
bank_select_lsb = -1
elif event[0] == 'sysex_f0':
if _sysex2midimode.get(event[2], -1) >= 0:
general_midi_mode.append(_sysex2midimode.get(event[2]))
if is_a_score:
if event[1] > nticks:
nticks = event[1]
else:
nticks += event[1]
if lowest_pitch == 128:
lowest_pitch = 0
channels_by_track.append(channels_this_track)
patch_changes_by_track.append(patch_changes_this_track)
pitch_range_by_track.append((lowest_pitch,highest_pitch))
pitch_range_sum += (highest_pitch-lowest_pitch)
i += 1
return {'bank_select':bank_select,
'channels_by_track':channels_by_track,
'channels_total':channels_total,
'general_midi_mode':general_midi_mode,
'ntracks':len(opus_or_score)-1,
'nticks':nticks,
'num_notes_by_channel':num_notes_by_channel,
'patch_changes_by_track':patch_changes_by_track,
'patch_changes_total':patch_changes_total,
'percussion':percussion,
'pitches':pitches,
'pitch_range_by_track':pitch_range_by_track,
'pitch_range_sum':pitch_range_sum,
'ticks_per_quarter':ticks_per_quarter}
#----------------------------- Event stuff --------------------------
_sysex2midimode = {
"\x7E\x7F\x09\x01\xF7": 1,
"\x7E\x7F\x09\x02\xF7": 0,
"\x7E\x7F\x09\x03\xF7": 2,
}
# Some public-access tuples:
MIDI_events = tuple('''note_off note_on key_after_touch
control_change patch_change channel_after_touch
pitch_wheel_change'''.split())
Text_events = tuple('''text_event copyright_text_event
track_name instrument_name lyric marker cue_point text_event_08
text_event_09 text_event_0a text_event_0b text_event_0c
text_event_0d text_event_0e text_event_0f'''.split())
Nontext_meta_events = tuple('''end_track set_tempo
smpte_offset time_signature key_signature sequencer_specific
raw_meta_event sysex_f0 sysex_f7 song_position song_select
tune_request'''.split())
# unsupported: raw_data
# Actually, 'tune_request' is is F-series event, not strictly a meta-event...
Meta_events = Text_events + Nontext_meta_events
All_events = MIDI_events + Meta_events
# And three dictionaries:
Number2patch = { # General MIDI patch numbers:
0:'Acoustic Grand',
1:'Bright Acoustic',
2:'Electric Grand',
3:'Honky-Tonk',
4:'Electric Piano 1',
5:'Electric Piano 2',
6:'Harpsichord',
7:'Clav',
8:'Celesta',
9:'Glockenspiel',
10:'Music Box',
11:'Vibraphone',
12:'Marimba',
13:'Xylophone',
14:'Tubular Bells',
15:'Dulcimer',
16:'Drawbar Organ',
17:'Percussive Organ',
18:'Rock Organ',
19:'Church Organ',
20:'Reed Organ',
21:'Accordion',
22:'Harmonica',
23:'Tango Accordion',
24:'Acoustic Guitar(nylon)',
25:'Acoustic Guitar(steel)',
26:'Electric Guitar(jazz)',
27:'Electric Guitar(clean)',
28:'Electric Guitar(muted)',
29:'Overdriven Guitar',
30:'Distortion Guitar',
31:'Guitar Harmonics',
32:'Acoustic Bass',
33:'Electric Bass(finger)',
34:'Electric Bass(pick)',
35:'Fretless Bass',
36:'Slap Bass 1',
37:'Slap Bass 2',
38:'Synth Bass 1',
39:'Synth Bass 2',
40:'Violin',
41:'Viola',
42:'Cello',
43:'Contrabass',
44:'Tremolo Strings',
45:'Pizzicato Strings',
46:'Orchestral Harp',
47:'Timpani',
48:'String Ensemble 1',
49:'String Ensemble 2',
50:'SynthStrings 1',
51:'SynthStrings 2',
52:'Choir Aahs',
53:'Voice Oohs',
54:'Synth Voice',
55:'Orchestra Hit',
56:'Trumpet',
57:'Trombone',
58:'Tuba',
59:'Muted Trumpet',
60:'French Horn',
61:'Brass Section',
62:'SynthBrass 1',
63:'SynthBrass 2',
64:'Soprano Sax',
65:'Alto Sax',
66:'Tenor Sax',
67:'Baritone Sax',
68:'Oboe',
69:'English Horn',
70:'Bassoon',
71:'Clarinet',
72:'Piccolo',
73:'Flute',
74:'Recorder',
75:'Pan Flute',
76:'Blown Bottle',
77:'Skakuhachi',
78:'Whistle',
79:'Ocarina',
80:'Lead 1 (square)',
81:'Lead 2 (sawtooth)',
82:'Lead 3 (calliope)',
83:'Lead 4 (chiff)',
84:'Lead 5 (charang)',
85:'Lead 6 (voice)',
86:'Lead 7 (fifths)',
87:'Lead 8 (bass+lead)',
88:'Pad 1 (new age)',
89:'Pad 2 (warm)',
90:'Pad 3 (polysynth)',
91:'Pad 4 (choir)',
92:'Pad 5 (bowed)',
93:'Pad 6 (metallic)',
94:'Pad 7 (halo)',
95:'Pad 8 (sweep)',
96:'FX 1 (rain)',
97:'FX 2 (soundtrack)',
98:'FX 3 (crystal)',
99:'FX 4 (atmosphere)',
100:'FX 5 (brightness)',
101:'FX 6 (goblins)',
102:'FX 7 (echoes)',
103:'FX 8 (sci-fi)',
104:'Sitar',
105:'Banjo',
106:'Shamisen',
107:'Koto',
108:'Kalimba',
109:'Bagpipe',
110:'Fiddle',
111:'Shanai',
112:'Tinkle Bell',
113:'Agogo',
114:'Steel Drums',
115:'Woodblock',
116:'Taiko Drum',
117:'Melodic Tom',
118:'Synth Drum',
119:'Reverse Cymbal',
120:'Guitar Fret Noise',
121:'Breath Noise',
122:'Seashore',
123:'Bird Tweet',
124:'Telephone Ring',
125:'Helicopter',
126:'Applause',
127:'Gunshot',
}
Notenum2percussion = { # General MIDI Percussion (on Channel 9):
35:'Acoustic Bass Drum',
36:'Bass Drum 1',
37:'Side Stick',
38:'Acoustic Snare',
39:'Hand Clap',
40:'Electric Snare',
41:'Low Floor Tom',
42:'Closed Hi-Hat',
43:'High Floor Tom',
44:'Pedal Hi-Hat',
45:'Low Tom',
46:'Open Hi-Hat',
47:'Low-Mid Tom',
48:'Hi-Mid Tom',
49:'Crash Cymbal 1',
50:'High Tom',
51:'Ride Cymbal 1',
52:'Chinese Cymbal',
53:'Ride Bell',
54:'Tambourine',
55:'Splash Cymbal',
56:'Cowbell',
57:'Crash Cymbal 2',
58:'Vibraslap',
59:'Ride Cymbal 2',
60:'Hi Bongo',
61:'Low Bongo',
62:'Mute Hi Conga',
63:'Open Hi Conga',
64:'Low Conga',
65:'High Timbale',
66:'Low Timbale',
67:'High Agogo',
68:'Low Agogo',
69:'Cabasa',
70:'Maracas',
71:'Short Whistle',
72:'Long Whistle',
73:'Short Guiro',
74:'Long Guiro',
75:'Claves',
76:'Hi Wood Block',
77:'Low Wood Block',
78:'Mute Cuica',
79:'Open Cuica',
80:'Mute Triangle',
81:'Open Triangle',
}
Event2channelindex = { 'note':3, 'note_off':2, 'note_on':2,
'key_after_touch':2, 'control_change':2, 'patch_change':2,
'channel_after_touch':2, 'pitch_wheel_change':2
}
################################################################
# The code below this line is full of frightening things, all to
# do with the actual encoding and decoding of binary MIDI data.
def _twobytes2int(byte_a):
r'''decode a 16 bit quantity from two bytes,'''
return (byte_a[1] | (byte_a[0] << 8))
def _int2twobytes(int_16bit):
r'''encode a 16 bit quantity into two bytes,'''
return bytes([(int_16bit>>8) & 0xFF, int_16bit & 0xFF])
def _read_14_bit(byte_a):
r'''decode a 14 bit quantity from two bytes,'''
return (byte_a[0] | (byte_a[1] << 7))
def _write_14_bit(int_14bit):
r'''encode a 14 bit quantity into two bytes,'''
return bytes([int_14bit & 0x7F, (int_14bit>>7) & 0x7F])
def _ber_compressed_int(integer):
r'''BER compressed integer (not an ASN.1 BER, see perlpacktut for
details). Its bytes represent an unsigned integer in base 128,
most significant digit first, with as few digits as possible.
Bit eight (the high bit) is set on each byte except the last.
'''
ber = bytearray(b'')
seven_bits = 0x7F & integer
ber.insert(0, seven_bits) # XXX surely should convert to a char ?
integer >>= 7
while integer > 0:
seven_bits = 0x7F & integer
ber.insert(0, 0x80|seven_bits) # XXX surely should convert to a char ?
integer >>= 7
return ber
def _unshift_ber_int(ba):
r'''Given a bytearray, returns a tuple of (the ber-integer at the
start, and the remainder of the bytearray).
'''
if not len(ba): # 6.7
_warn('_unshift_ber_int: no integer found')
return ((0, b""))
byte = ba.pop(0)
integer = 0
while True:
integer += (byte & 0x7F)
if not (byte & 0x80):
return ((integer, ba))
if not len(ba):
_warn('_unshift_ber_int: no end-of-integer found')
return ((0, ba))
byte = ba.pop(0)
integer <<= 7
def _clean_up_warnings(): # 5.4
# Call this before returning from any publicly callable function
# whenever there's a possibility that a warning might have been printed
# by the function, or by any private functions it might have called.
global _previous_times
global _previous_warning
if _previous_times > 1:
# E:1176, 0: invalid syntax (<string>, line 1176) (syntax-error) ???
# print(' previous message repeated '+str(_previous_times)+' times', file=sys.stderr)
# 6.7
sys.stderr.write(' previous message repeated {0} times\n'.format(_previous_times))
elif _previous_times > 0:
sys.stderr.write(' previous message repeated\n')
_previous_times = 0
_previous_warning = ''
def _warn(s=''):
global _previous_times
global _previous_warning
if s == _previous_warning: # 5.4
_previous_times = _previous_times + 1
else:
_clean_up_warnings()
sys.stderr.write(str(s)+"\n")
_previous_warning = s
def _some_text_event(which_kind=0x01, text=b'some_text', text_encoding='ISO-8859-1'):
if str(type(text)).find("'str'") >= 0: # 6.4 test for back-compatibility
data = bytes(text, encoding=text_encoding)
else:
data = bytes(text)
return b'\xFF'+bytes((which_kind,))+_ber_compressed_int(len(data))+data
def _consistentise_ticks(scores): # 3.6
# used by mix_scores, merge_scores, concatenate_scores
if len(scores) == 1:
return copy.deepcopy(scores)
are_consistent = True
ticks = scores[0][0]
iscore = 1
while iscore < len(scores):
if scores[iscore][0] != ticks:
are_consistent = False
break
iscore += 1
if are_consistent:
return copy.deepcopy(scores)
new_scores = []
iscore = 0
while iscore < len(scores):
score = scores[iscore]
new_scores.append(opus2score(to_millisecs(score2opus(score))))
iscore += 1
return new_scores
###########################################################################
def _decode(trackdata=b'', exclude=None, include=None,
event_callback=None, exclusive_event_callback=None, no_eot_magic=False):
r'''Decodes MIDI track data into an opus-style list of events.
The options:
'exclude' is a list of event types which will be ignored SHOULD BE A SET
'include' (and no exclude), makes exclude a list
of all possible events, /minus/ what include specifies
'event_callback' is a coderef
'exclusive_event_callback' is a coderef
'''
trackdata = bytearray(trackdata)
if exclude == None:
exclude = []
if include == None:
include = []
if include and not exclude:
exclude = All_events
include = set(include)
exclude = set(exclude)
# Pointer = 0; not used here; we eat through the bytearray instead.
event_code = -1; # used for running status
event_count = 0;
events = []
while(len(trackdata)):
# loop while there's anything to analyze ...
eot = False # When True, the event registrar aborts this loop
event_count += 1
E = []
# E for events - we'll feed it to the event registrar at the end.
# Slice off the delta time code, and analyze it
[time, remainder] = _unshift_ber_int(trackdata)
# Now let's see what we can make of the command
first_byte = trackdata.pop(0) & 0xFF
if (first_byte < 0xF0): # It's a MIDI event
if (first_byte & 0x80):
event_code = first_byte
else:
# It wants running status; use last event_code value
trackdata.insert(0, first_byte)
if (event_code == -1):
_warn("Running status not set; Aborting track.")
return []
command = event_code & 0xF0
channel = event_code & 0x0F
if (command == 0xF6): # 0-byte argument
pass
elif (command == 0xC0 or command == 0xD0): # 1-byte argument
parameter = trackdata.pop(0) # could be B
else: # 2-byte argument could be BB or 14-bit
parameter = (trackdata.pop(0), trackdata.pop(0))
#################################################################
# MIDI events
if (command == 0x80):
if 'note_off' in exclude:
continue
E = ['note_off', time, channel, parameter[0], parameter[1]]
elif (command == 0x90):