Python MidiFile.MIDIFile类代码示例

    class FileOutput(Output):
        url_example = "file://foo.mid"

        def __init__(self, url):
            Output.__init__(self)
            outfile = url.netloc + url.path

            if not outfile:
                print "file:// output needs a filename"
                raise ValueError("File output needs a filename")

            log.info("Opening File output: %s", outfile)
            self.midi = MIDIFile(1)
            self.midi.addTrackName(0, 0, "Mic2Mid Track 0")
            self.midi.addTempo(0, 0, 60)
            self.midi.addProgramChange(0, 0, 0, 27)
            self.start = time.time()
            self.filename = outfile

        def close(self):
            Output.close(self)
            log.info("Closing File output: %s", self.filename)
            fp = open(self.filename, "wb")
            self.midi.writeFile(fp)
            fp.close()

        def note_on(self, note):
            self.midi.addNote(0, 0, self.note_to_midi(note), time.time() - self.start, 1, 100)

class PatternWriterMIDI:
	def __init__(self, numtracks = 1):
		self.score = MIDIFile(numtracks)
		self.track = 0
		self.channel = 0
		self.volume = 64

	def addTrack(self, pattern, tracknumber = 0, trackname = "track", dur = 1.0):
		time = 0
		# naive approach: assume every duration is 1
		# TODO: accept dicts or PDicts
		try:
			for note in pattern:
				vdur = Pattern.value(dur)
				if note is not None and vdur is not None:
					self.score.addNote(tracknumber, self.channel, note, time, vdur, self.volume)
					time += vdur
				else:
					time += vdur
		except StopIteration:
			# a StopIteration exception means that an input pattern has been exhausted.
			# catch it and treat the track as completed.
			pass

	def addTimeline(self, timeline):
		# TODO: translate entire timeline into MIDI
		# difficulties: need to handle degree/transpose params
		#			   need to handle channels properly, and reset numtracks
		pass

	def writeFile(self, filename = "score.mid"):
		fd = open(filename, 'wb')
		self.score.writeFile(fd)
		fd.close()

class MidiFileOut:
	def __init__(self, numtracks = 16):
		self.score = MIDIFile(numtracks)
		self.track = 0
		self.channel = 0
		self.volume = 64
		self.time = 0

	def tick(self, ticklen):
		self.time += ticklen

	def noteOn(self, note = 60, velocity = 64, channel = 0, duration = 1):
		#------------------------------------------------------------------------
		# avoid rounding errors
		#------------------------------------------------------------------------
		time = round(self.time, 5)
		self.score.addNote(channel, channel, note, time, duration, velocity)

	def noteOff(self, note = 60, channel = 0):
		pass

	def writeFile(self, filename = "score.mid"):
		fd = open(filename, 'wb')
		self.score.writeFile(fd)
		fd.close()

def main(argv):

 if len(argv) == 1:
  for line in open(argv[0],'r'):
   MyMIDI = MIDIFile(1)
   MyMIDI.addTempo(0,0,120)
   array = line.split(";")
   MyMIDI = makeProgression(noteToPitch(array[0]),noteToPitch(array[1]),array[2].split(" "), MyMIDI)
   writeToFile(array[3].rstrip('\n'), MyMIDI)
   MyMIDI = None
 else:
  print "Enter first note in sequence: "
  firstnote = noteToPitch(raw_input())
  # process first note

  print "Enter last note in sequence: "
  lastnote = noteToPitch(raw_input())
  # process last note

  print "Enter first note progression in the following format: "
  print "note/duration note/duration note/duration"
  progression = raw_input()
  # process note progression

  progression = progression.split(" ")
  makeProgression(firstnote,lastnote,progression)

  print "Enter file name: "
  filename = raw_input()
  writeToFile(filename)

class MidiFileOut:
	""" Write events to a MIDI file.
	    Requires the MIDIUtil package:
		https://code.google.com/p/midiutil/ """

	def __init__(self, numtracks = 16):
		from midiutil.MidiFile import MIDIFile

		self.score = MIDIFile(numtracks)
		self.track = 0
		self.channel = 0
		self.volume = 64
		self.time = 0

	def tick(self, ticklen):
		self.time += ticklen

	def noteOn(self, note = 60, velocity = 64, channel = 0, duration = 1):
		#------------------------------------------------------------------------
		# avoid rounding errors
		#------------------------------------------------------------------------
		time = round(self.time, 5)
		self.score.addNote(channel, channel, note, time, duration, velocity)

	def noteOff(self, note = 60, channel = 0):
		pass

	def writeFile(self, filename = "score.mid"):
		fd = open(filename, 'wb')
		self.score.writeFile(fd)
		fd.close()

	def export(self, filename):
		'Exports the project to a MIDI-file'
		# entries must contain stuff
		if len(self.entries) == 0:
			return

		# reset the midi variable
		global Midi
		Midi = MIDIFile(1)
		Midi.addTrackName(track, time_start, 'MIDI Cuer')

		# the great export loop
		all_beats = int( math.ceil( self.entries[len(self.entries)-1][3] ) )
		out = {}
		for x in xrange(1, len(self.entries)):
			out.update( self.calcIterBeats( self.entries[x-1][3], self.entries[x][3], self.entries[x-1][2], self.entries[x][2], self.stepsize ) )


		for x in sorted(out.iterkeys()):
			AddTempo(x, out[x])
			if self.BeatExists(x):
				AddNote(x)

		# de-comment following 3 lines for debugging during output
		# print 'Debuggin:'
		# for x in sorted(out):
		# 	print x, out[x]

		SaveIt(filename)

 def testAddNote(self):
     MyMIDI = MIDIFile(1)
     MyMIDI.addNote(0, 0, 100, 0, 1, 100)
     self.assertEquals(MyMIDI.tracks[0].eventList[0].type, "note")
     self.assertEquals(MyMIDI.tracks[0].eventList[0].pitch, 100)
     self.assertEquals(MyMIDI.tracks[0].eventList[0].time, 0)
     self.assertEquals(MyMIDI.tracks[0].eventList[0].duration, 1)
     self.assertEquals(MyMIDI.tracks[0].eventList[0].volume, 100)

def initializeTrack(tempo=100, numTracks=15):
  """Create a song with the given tempo."""
  song = MIDIFile(numTracks)

  time = 0
  for track in range(numTracks):
    song.addTrackName(track, time, "Track " + str(track))
    song.addTempo(track, time, tempo)

  return song

def play(request):
  global outputId

  json = simplejson.loads(request.POST.get('notes'))

  midiFile = MIDIFile(1)

  track = 0
  time = 0
  midiFile.addTrackName(track, time, "Sample Track")
  midiFile.addTempo(track, time, 120)

  channel = 0
  volume = 100

  string = ""

  for note in json['notes']:
    pitch = strToMidiPitch(note['pitch'])
    duration = note['duration']
    start = note['start']
    midiFile.addNote(track, channel, pitch, start, duration, volume)
    string += "added note " + note['pitch'] + ": " + str(pitch) + ", "

  binfile = open("/tmp/output.mid", 'wb')
  midiFile.writeFile(binfile)
  binfile.close()

  call(['fluidsynth', '-l', '-F', '/tmp/output_'+str(outputId)+'.wav', '/usr/share/sounds/sf2/FluidR3_GM.sf2', '/tmp/output.mid'])
  call(['lame', '--preset', 'standard',
        '/tmp/output_'+str(outputId)+'.wav',
        '/tmp/output_'+str(outputId)+'.mp3'])
  outputId += 1

  return HttpResponse(outputId-1)

    def write_midi_file(self, file_object):
        """Writes midi generated from this tab to the given file object."""
        # Throw an exception if there are note names for which we can't
        # determine the proper note numbers.
        unmappable_note_names = self.note_types.difference(
            self.note_name_to_number_map.keys())
        if unmappable_note_names:
            raise UnmappableNoteNamesException(unmappable_note_names)

        midifile = MIDIFile(1)
        track = 0
        channel = 9
        duration = round(4.0 / self.divisions_in_bar, 10)
        # 4.0 is because midiutil's  unit of time is the quarter note.
        midifile.addTrackName(track, 0, "")
        midifile.addTempo(track, 0, self._bpm)
        for note in self.walk_notes():
            strike_type = note['strike_type']
            volume = self._volume_for_strke_type(strike_type)
            if strike_type == 'r':
                pitch = GM_SPEC_NOTE_NAME_TO_NUMBER_MAP['Sticks']
            else:
                pitch = self.note_name_to_number_map[note['note_type']]
            midifile.addNote(track, channel, pitch, note['time'], duration,
                             volume)
        midifile.writeFile(file_object)

    def render(self, doc, output_file='output.mid'):
        ''' Produces actual output.
        Assumptions: separate channel for each DataObject'''
        # Note - I fixed a bug in MidiFile.py that was causing crashes (part of the midiutil lib).
        # Author confirms this is a bug, and will eventually fix and patch, but for now there's a
        # modified version of midiutil bundled with the project.

        # Create the MIDIFile Object with 1 track
        MyMIDI = MIDIFile(1)

        # Tracks are numbered from zero. Times are measured in beats.
        track = 0
        time = 0

        # Add track name and tempo.
        MyMIDI.addTrackName(track, time, "Sample Track")
        MyMIDI.addTempo(track, time, self.tempo)

        for channel, do in enumerate(doc):
            for cc_number, time_series in do.items():
                for i, val in enumerate(time_series):
                    time = float(i) / time_series.sample_rate
                    logging.debug(str(time) + ' ' + str(val))
                    MyMIDI.addControllerEvent(track, channel, time, cc_number, int(val))

        # And write it to disk.
        with open(output_file, 'wb') as binfile:
            MyMIDI.writeFile(binfile)
        return MyMIDI

def saveMIDI(filename, noteOnsets, melody, tempo, Fs, hopSize):
    barOnsets = (noteOnsets*hopSize/float(Fs))*(tempo/60)    #Onsets dado en barra
    notes = quantizeNote(melody)    
    track = 0
    time = 0       
    MIDI = MIDIFile(1)
    
    # Add track name and tempo.
    MIDI.addTrackName(track,time,"MIDI TRACK")
    MIDI.addTempo(track,time,tempo)
    
    channel = 0
    volume = 100
    
    for i in range(np.size(barOnsets)):
        pitch = notes[noteOnsets[i]+1]  #leer el pitch en el siguiente frame al onset
        if pitch > 0:
            time = barOnsets[i]
            if i == np.size(barOnsets)-1:
                duration = 1
            else:
                duration = barOnsets[i+1]-barOnsets[i] 
            
            MIDI.addNote(track,channel,pitch,time,duration,volume)

    # And write it to disk.
    binfile = open(filename, 'wb')
    MIDI.writeFile(binfile)
    binfile.close()    

def playMIDI(x,counter,counter2, O):
    from midiutil.MidiFile import MIDIFile
    MyMIDI=MIDIFile(1, removeDuplicates=False, deinterleave=False)
    track=0
    time=0
    MyMIDI.addTrackName(track,time,"Sample")
    MyMIDI.addTempo(track,time,60)
    track=0
    channel=0
    a=North[x]
    b=East[x]
    c=West[x]
    averagex=round(((a+b+c)/3),0)
    pitchcalc=pitchnum(averagex)
    pitch=pitchcalc
    timecalc,O=deltatime(counter, O)
    time=2
    duration=timecalc
    if counter2==0:
        volume=10*(int(round(math.pow(North[x],1.0/3))))
    elif counter2==1:
        volume=10*(int(round(math.pow(East[x],1.0/3))))
    elif counter2==2:
        volume=10*(int(round(math.pow(West[x],1.0/3))))
    else:
        print("numcount error", counter2)
        volume=127
    MyMIDI.addNote(track,channel,pitch,time,duration,volume)
    outcount=str(counter)
    numcount=str(counter2)
    binfile=open(outpath+"/output "+outcount+" "+numcount+".mid",'wb')
    MyMIDI.writeFile(binfile)
    print(counter,"\n",track,channel,pitch,time,duration,volume)
    binfile.close()
    return O

def matrix_to_midi(notes, filename = 'matrix.mid', tempo = 60):
    """ Simplify midi generation
        note format: PITCH|START|DURATION|VOLUME """
    # Midi file with one track
    mf = MIDIFile(1)

    track = 0
    time = 0
    mf.addTrackName(track, time, filename[7:-4])

    # Default
    # FIXME tempo -- time relation is not well defined
    mf.addTempo(track, time, tempo)
    channel = 0

    time_per_tick = 2**-5

    for note in notes:
        pitch = note[0]
        start = note[1] * time_per_tick
        stop  = note[2] * time_per_tick
        vol   = note[3]
        mf.addNote(track, channel, pitch, start, stop, vol)

    # Save as file
    with open(filename, 'wb') as fout:
        mf.writeFile(fout)

def midFile(melody):
    MyMIDI = MIDIFile(1)

    track = 0
    time = 0

    MyMIDI.addTrackName(track, time, "Vireo")
    MyMIDI.addTempo(track, time, 340)

    track = 0
    channel = 0
    time = 0
    volume = 100

    for i in melody:
        data = i.split()
        MyMIDI.addNote(track, channel, int(data[0].strip()), time, int(data[1].strip()), volume)
        time = time + int(data[1].strip())

    midi = ""
    binfile = open("./static/test.mid", "wb")
    MyMIDI.writeFile(binfile)
    binfile.close()
    binfile = open("./static/test.mid", "rb")
    midi = binfile.read()
    binfile.close()

    return midi