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controller.py
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controller.py
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import datetime
import time
from functools import partial
from PyQt5 import QtCore
from ui import Ui
from events import EventBus
from library_controller import LibraryController
from social_controller import SocialController
class Controller(QtCore.QObject):
def __init__(self, app, loop, engine):
super().__init__()
self.app = app
self.loop = loop
self.engine = engine
self.timers = {}
self.event_bus = EventBus(loop, self)
self.ui = Ui()
self.ui.show()
self.ui.shortcut_close.activated.connect(self.close_app)
self.ui.decks[0].play_pause.connect(self.play_pause_clicked)
self.ui.decks[1].play_pause.connect(self.play_pause_clicked)
self.ui.decks[0].tempo_changed.connect(self.tempo_changed)
self.ui.decks[1].tempo_changed.connect(self.tempo_changed)
self.ui.cross_fader.valueChanged.connect(self.cross_fade)
self.social_controller = SocialController(self, self.ui)
self.library_controller = LibraryController(self, self.ui)
def close_app(self):
self.app.quit()
@QtCore.pyqtSlot(bool, int)
def play_pause_clicked(self, value, deck):
if value is True:
position = self.engine.players[deck].get_position()
self.engine.play(deck)
self.connect_vu_meter(deck)
self.send_play(deck, position)
else:
self.engine.pause(deck)
del self.timers[deck]
self.ui.decks[deck].vu_meter.setValue(0)
self.send_pause(deck)
print(value)
def send_play(self, deck, position):
timestamp = time.time()
self.event_bus.send_data(timestamp, f'PLAY {deck} {position}')
def receive_play(self, timestamp, deck, offset):
self.ui.decks[int(deck)].play_button.setChecked(True)
self.engine.play(int(deck), offset, timestamp)
self.connect_vu_meter(deck)
def send_load(self, deck, track):
timestamp = time.time()
self.event_bus.send_data(timestamp, f'LOAD {deck} {track}')
def receive_load(self, timestamp, deck, track):
self.library_controller.load_track(deck, name=track, send=False)
def send_pause(self, deck):
timestamp = time.time()
self.event_bus.send_data(timestamp, f'PAUSE {deck}')
def receive_pause(self, timestamp, deck):
self.engine.pause(deck)
self.ui.decks[deck].play_button.setChecked(False)
del self.timers[deck]
self.ui.decks[deck].vu_meter.setValue(0)
def send_tempo_changed(self, deck, tempo):
timestamp = time.time()
self.event_bus.send_data(timestamp, f'TEMPO {deck} {tempo}')
def receive_tempo(self, timestamp, deck, tempo):
self.engine.change_tempo(deck, tempo, timestamp)
self.ui.decks[deck].tempo_slider.blockSignals(True)
self.ui.decks[deck].tempo_slider.setValue(int(tempo*256))
self.ui.decks[deck].tempo_slider.blockSignals(False)
def send_cross_fade(self, value):
timestamp = time.time()
self.event_bus.send_data(timestamp, f'CROSSFADE {value}')
def receive_cross_fade(self, timestamp, value):
self.cross_fade(value, send=False)
self.ui.cross_fader.blockSignals(True)
self.ui.cross_fader.setValue(value)
self.ui.cross_fader.blockSignals(False)
@QtCore.pyqtSlot(int, int)
def tempo_changed(self, value, deck):
self.engine.change_tempo(deck, value/256)
self.send_tempo_changed(deck, value/256)
def receive(self, timestamp, sender, msg):
print('RECEIVED', timestamp, msg)
print(msg)
if msg.startswith('PLAY'):
_, deck, offset = msg.split(' ')
self.receive_play(timestamp, int(deck), float(offset))
elif msg.startswith('LOAD'):
_, deck, track = msg.split(' ', 2)
self.receive_load(timestamp, int(deck), track)
elif msg.startswith('PAUSE'):
_, deck = msg.split(' ')
self.receive_pause(timestamp, int(deck))
elif msg.startswith('TEMPO'):
_, deck, tempo = msg.split(' ')
self.receive_tempo(timestamp, int(deck), float(tempo))
elif msg.startswith('CROSSFADE'):
_, value = msg.split(' ')
self.receive_cross_fade(timestamp, int(value))
elif msg.startswith('LIBRARY'):
_, value = msg.split(' ', 1)
self.library_controller.receive(timestamp, sender, value)
elif msg.startswith('SOC'):
_, value = msg.split(' ', 1)
self.social_controller.receive(timestamp, sender, value)
@QtCore.pyqtSlot(int)
def cross_fade(self, value, send=True):
# "Transition" linear mode
left_volume = min(1, 1 - value/256)
right_volume = min(1, 1 + value/256)
self.engine.players[0].volume = left_volume
self.engine.players[1].volume = right_volume
if send is True:
self.send_cross_fade(value)
def connect_vu_meter(self, deck):
timer = QtCore.QTimer()
timer.deck = deck
timer.setInterval(20)
callback = partial(self.update_vu_meter, deck=deck)
timer.timeout.connect(callback)
timer.start()
self.timers[deck] = timer
@QtCore.pyqtSlot()
def update_vu_meter(self, deck):
value = int(self.engine.players[deck].loudness * 100)
self.ui.decks[deck].vu_meter.setValue(value)