def createMidiFileBuilder(self, txt):
provided = {}
provided['Builder'] =bbuilder.BMidiBuilder #reference to class
provided['alert'] = midiscript_util.alert #reference to fn
provided['status'] = self.status #reference to fn
#run the code
evaler = midiscript_util.Interpreter(provided)
res = evaler.run_code(txt)
if res!=True:
midiscript_util.alert(res)
return
#we are most interested in what they set "result" to.
if 'result' not in provided or not provided['result']:
midiscript_util.alert('You must set "result" to something.')
return
res = provided['result']
#either a sequence or a value
if isinstance(res, bbuilder.BMidiBuilder):
#is a single instance
mfileobject = bbuilder.build_midi([res])
else:
mfileobject = bbuilder.build_midi(res)
return mfileobject
def go(self, s):
s = s.replace('\r\n', '\n')
s = stripComments(s)
#check for misplaced >>. they can only occur at the beginning of a line.
found = re.findall(r'[^\n]>>', s)
if found:
raise InterpException(
'The characters >> can only be at start of line. This was not the case: "%s"'
% found[0])
lines = s.split('\n')
#create tracks
self.trackObjs = [
bbuilder.BMidiBuilder() for i in range(Maxtracks)
] #eventually, will be assigned different channels, but not yet.
self.state_octave = [4 for i in range(Maxtracks)
] #keeps track of current octave for each track
self.state_currentBend = [
0 for i in range(Maxtracks)
] #keeps track of current pitch-bend state for each track
for trackobj in self.trackObjs:
trackobj.tempo = 400
trackobj.addFasterTempo = True #secret undocumented un-understood event
self.haveSeenNotes = False #have we seen any notes yet?
for nline in range(len(lines)):
line = lines[nline].strip()
if not line:
continue
elif line.startswith('('):
self.interpretControlString(line)
elif line.startswith('>>'):
self.haveSeenNotes = True
parts = [line]
nindex = nline
while lines[nindex + 1].startswith('>>'):
parts.append(lines[nindex + 1])
lines[nindex + 1] = '' #erase that one
nindex += 1
if len(parts) > Maxtracks:
raise InterpException("Exceeded maximum of %d tracks." %
Maxtracks)
#each track keeps track of its own currentTime. At the end, though, we have to sync them all back up.
longestTimeSeen = -1
for i in range(len(parts)):
if Debug: print('TRACK %d' % i)
_, parts[i] = eatChars(parts[i],
2) #remove the >> characters
self.interpretMusicString(parts[i], i)
if self.trackObjs[i].currentTime > longestTimeSeen:
longestTimeSeen = self.trackObjs[i].currentTime
# restore track sync for all of the tracks.
for trackobj in self.trackObjs:
trackobj.currentTime = longestTimeSeen
else:
self.haveSeenNotes = True
self.interpretMusicString(line, 0)
# keep track sync for all of the tracks.
lastTimeSeen = self.trackObjs[0].currentTime
for trackobj in self.trackObjs:
trackobj.currentTime = lastTimeSeen
actualtracks = [
trackobj for trackobj in self.trackObjs if len(trackobj.notes) > 0
]
if len(actualtracks) == 0:
#no notes found, so just stop
return None
# convert notes of pitch 0 to rests.
for trackobj in actualtracks:
trackobj.notes = [
note for note in trackobj.notes if not (
isinstance(note, bbuilder.SimpleNote) and note.pitch == 0)
]
#join all of the tracks, returning a midifile
mfile = bbuilder.build_midi(actualtracks)
if Debug: print(mfile)
return mfile
def go(self, s):
s = s.replace('\r\n','\n')
s = stripComments(s)
#check for misplaced >>. they can only occur at the beginning of a line.
found = re.findall(r'[^\n]>>', s)
if found: raise InterpException('The characters >> can only be at start of line. This was not the case: "%s"'%found[0])
lines=s.split('\n')
#create tracks
self.trackObjs = [bbuilder.BMidiBuilder() for i in range(Maxtracks)] #eventually, will be assigned different channels, but not yet.
self.state_octave = [4 for i in range(Maxtracks)] #keeps track of current octave for each track
self.state_currentBend = [0 for i in range(Maxtracks)] #keeps track of current pitch-bend state for each track
for trackobj in self.trackObjs: trackobj.tempo = 400; trackobj.addFasterTempo = True #secret undocumented un-understood event
self.haveSeenNotes = False #have we seen any notes yet?
for nline in range(len(lines)):
line = lines[nline].strip()
if not line:
continue
elif line.startswith('('):
self.interpretControlString(line)
elif line.startswith('>>'):
self.haveSeenNotes = True
parts = [line]
nindex = nline
while lines[nindex+1].startswith('>>'):
parts.append(lines[nindex+1])
lines[nindex+1] = '' #erase that one
nindex += 1
if len(parts)>Maxtracks: raise InterpException("Exceeded maximum of %d tracks."%Maxtracks)
#each track keeps track of its own currentTime. At the end, though, we have to sync them all back up.
longestTimeSeen = -1
for i in range(len(parts)):
if Debug: print 'TRACK %d'%i
_, parts[i] = eatChars(parts[i], 2) #remove the >> characters
self.interpretMusicString(parts[i], i)
if self.trackObjs[i].currentTime > longestTimeSeen: longestTimeSeen = self.trackObjs[i].currentTime
# restore track sync for all of the tracks.
for trackobj in self.trackObjs: trackobj.currentTime = longestTimeSeen
else:
self.haveSeenNotes = True
self.interpretMusicString( line, 0 )
# keep track sync for all of the tracks.
lastTimeSeen = self.trackObjs[0].currentTime
for trackobj in self.trackObjs: trackobj.currentTime = lastTimeSeen
actualtracks = [trackobj for trackobj in self.trackObjs if len(trackobj.notes) > 0]
if len(actualtracks) == 0:
#no notes found, so just stop
return None
# convert notes of pitch 0 to rests.
for trackobj in actualtracks:
trackobj.notes = [note for note in trackobj.notes if not (isinstance(note,bbuilder.SimpleNote) and note.pitch==0)]
#join all of the tracks, returning a midifile
mfile = bbuilder.build_midi(actualtracks)
if Debug: print mfile
return mfile
