class Sequencer(object): def __init__(self): self.audio = PyAudio() self.page = 0 self.samples = [None] * 8 self.sampleI = 0 self.playing = False self.playingPage = 0 self.playingCol = 0 self.pages = [[[0] * 8 for i in xrange(8)] for i in xrange(8)] self.padPlayMode = False self.recordMode = False self.recording = None self.showBPM = False self.bpm = 240 self.bpmPressed = False self.bpmTimePressed = None self.dev = Launchpad() self.dev.handler = self.handler self.setLight = self.dev.setLight self.repaint() bpmState = True while True: if self.showBPM: since = clock() - self.bpmTimePressed if since >= 2 and not self.bpmPressed: self.showBPM = False self.setLight(4, 0, False, self.page == 4) else: per = 0.5 / self.bpm * 60 since %= per * 2 if since < per: if bpmState == True: self.setLight(4, 0, True, False) bpmState = False sleep(per / 2.0) elif bpmState == False: self.setLight(4, 0, False, self.page == 4) bpmState = True sleep(per / 2.0) else: sleep(0.5) def handler(self, dev, x, y, evt): if y == 0: if (evt and x not in (4, 5)) or (self.recordMode and x != 6): return if x == 2: # left page self.page = (self.page + 8 - 1) % 8 self.repaint() elif x == 3: # right page self.page = (self.page + 1) % 8 self.repaint() elif x == 4 or x == 5: # decrease/increase bpm if evt: self.bpmPressed = True self.showBPM = True self.bpmTimePressed = clock() self.modBPM = -1 if x == 4 else +1 else: self.bpmPressed = False self.bpmTimePressed = clock() self.modBPM = None elif x == 6: # toggle record mode if self.recordMode == 2: self.stopRecording() self.recordMode = False else: self.recordMode = 1 if self.recordMode == False else False self.setLight(6, 0, self.recordMode == 1, False) elif x == 7: # toggle pad play mode self.padPlayMode = not self.padPlayMode self.setLight(7, 0, False, self.padPlayMode) elif x == 8: pass else: if evt: return if self.padPlayMode: # just play the sample for this row pass elif self.recordMode == 1: # recording for that row self.recordMode = 2 self.record(y-1) self.setLight(6, 0, True, True) for i in xrange(8): self.setLight(i, y, True, self.pages[self.page][i][y-1]) elif self.recordMode == 2: # end recording if y - 1 != self.recording: return self.stopRecording() else: page = self.pages[self.page] page[x][y-1] = not page[x][y-1] self.setLight(x, y, False, page[x][y-1]) def record(self, row): self.recording = row self.recordingSample = '' self.input = self.audio.open(format=paInt16, channels=1, rate=44100, input=True, frames_per_buffer=441, stream_callback=self.gotSample) # 1/100th second per buffer def gotSample(self, data, frame_count, time_info, status): pass#self.recordingSample += data print 'foo?' def stopRecording(self): print len(self.recordingSample) / 2 / 44100.0 self.input.stop_stream() self.input.close() self.setLight(6, 0, False, False) for i in xrange(8): self.setLight(i, self.recording+1, False, self.pages[self.page][i][self.recording]) self.recordMode = False self.recording = None def setStatusLights(self): for i in xrange(8): self.setLight(i, 0, False, False) self.setLight(8, i+1, False, False) self.setLight(self.page, 0, self.playing and self.playingPage == self.page and self.playingCol == self.page, True) if self.playingPage == self.page and self.playingCol != self.page: self.setLight(self.playingCol, 0, True, False) if self.padPlayMode: self.setLight(7, 0, False, True) def repaint(self): self.dev.clear() self.setStatusLights() for x, row in enumerate(self.pages[self.page]): for y, val in enumerate(row): if val or x == self.recording: self.setLight(x, y+1, self.recording == x, True)
