class Channel(QObject):
def __init__(self,
name: T.Optional[str],
parent: T.Optional[QObject] = None) -> None:
super().__init__(parent)
self.name = name
self.slider_volume: Number = 100
self.threshold = PlaybackThreshold.Everything
self._loop_sound: T.Optional[Sound] = None
self._loop_player = QMediaPlayer(self)
self._loop_volume_adjustment: Number = 0
self._loop_player.setAudioRole(QAudio.GameRole)
self._loop_playlist = QMediaPlaylist(self)
self._loop_playlist.setPlaybackMode(QMediaPlaylist.CurrentItemOnce)
self._loop_player.setPlaylist(self._loop_playlist)
self._loop_player.stateChanged.connect(
self._on_loop_player_state_changed)
self._one_shot_player = QMediaPlayer(self)
self._one_shot_volume_adjustment: Number = 0
self._one_shot_player.setAudioRole(QAudio.GameRole)
self._one_shot_player.stateChanged.connect(
self._on_one_shot_player_state_changed)
@property
def is_playing(self):
return (self._loop_player.state() == QMediaPlayer.PlayingState
or self._one_shot_player.state() == QMediaPlayer.PlayingState)
def _on_loop_player_state_changed(self, state: QMediaPlayer.State) -> None:
logger.trace("Loop player state changed: {!r}", state)
if state != QMediaPlayer.StoppedState:
return
decibel = -self._loop_volume_adjustment
logger.trace("Readjusting loop player volume by {}db", decibel)
self.adjust_player_volume_by_decibel(self._loop_player, decibel)
self._loop_volume_adjustment = 0
# Loop playlist is empty
if not self._loop_playlist.mediaCount():
logger.trace("Loop playlist is empty, not queueing a new file")
return
# This shouldn't ever happen, it's just here to make mypy happy
if not self._loop_sound:
return
file = random.choices(self._loop_sound.files,
[file.weight
for file in self._loop_sound.files])[0]
index = self._loop_sound.files.index(file)
logger.trace(
"Loop player playing file: {!r} at playlist index: {}",
file,
index,
)
self._loop_playlist.setCurrentIndex(index)
self._loop_player.play()
def _on_one_shot_player_state_changed(self,
state: QMediaPlayer.State) -> None:
logger.trace("One-shot player state changed: {!r}", state)
if state != QMediaPlayer.StoppedState:
return
decibel = -self._one_shot_volume_adjustment
logger.trace("Readjusting one-shot player volume by {}db", decibel)
self.adjust_player_volume_by_decibel(self._one_shot_player, decibel)
self._one_shot_volume_adjustment = 0
logger.trace("One-shot player stopped, resuming loop player")
self._loop_player.play()
def play_sound(self, sound: Sound) -> None:
if sound.playback_threshold > self.threshold:
logger.trace("Ignoring sound {!r} because of threshold", sound)
return
if sound.loop is Loop.Start:
self._loop_sound = sound
# New looping sound, rebuild playlist
self._loop_playlist.clear()
for file in sound.files:
media = QUrl.fromLocalFile(file.file_name)
self._loop_playlist.addMedia(media)
# Select file based on weight and set the matching playlist index
weights = [file.weight for file in sound.files]
file = random.choices(sound.files, weights)[0]
index = sound.files.index(file)
self._loop_playlist.setCurrentIndex(index)
logger.trace("Adjusting loop player volume by {}db",
file.volume_adjustment)
self._loop_volume_adjustment = self.adjust_player_volume_by_decibel(
self._loop_player, file.volume_adjustment)
logger.trace("Adjusted One-shot player volume by {}db",
self._loop_volume_adjustment)
self._loop_player.play()
logger.trace(
"Loop player playing file: {!r} at playlist index: {}",
file,
index,
)
return
if sound.loop is Loop.Stop:
logger.trace("Stopping loop player")
self._loop_sound = None
self._loop_playlist.clear()
self._loop_player.stop()
else:
logger.trace("Pausing loop player for one-shot sound")
self._loop_player.pause()
file = random.choices(sound.files,
[file.weight for file in sound.files])[0]
media = QUrl.fromLocalFile(file.file_name)
self._one_shot_player.setMedia(media)
self._one_shot_volume_adjustment = self.adjust_player_volume_by_decibel(
self._one_shot_player, file.volume_adjustment)
logger.trace("Adjusted one-shot player volume by {}db",
self._one_shot_volume_adjustment)
self._one_shot_player.play()
logger.trace("One-shot player playing file: {!r}", file)
def set_player_volumes(self, volume: Number) -> None:
volume = round(volume)
self._loop_player.setVolume(volume)
self._one_shot_player.setVolume(volume)
# noinspection PyMethodMayBeStatic
def adjust_player_volume_by_decibel(self, player: QMediaPlayer,
decibel: Number) -> Number:
original_volume = player.volume()
target_volume = round(
add_decibel_to_linear_volume(original_volume, decibel))
player.setVolume(target_volume)
# Return clamped volume difference, so increasing linear volume 100 by n > 1 db
# returns 0
return player.volume() - original_volume
def set_threshold(self, threshold: PlaybackThreshold) -> None:
logger.trace("Setting channel threshold: {!r}", threshold)
self.threshold = threshold
if not self._loop_sound:
return
if self._loop_sound.playback_threshold > threshold:
logger.trace("Stopping loop player, new threshold too low")
self._loop_playlist.clear()
self._loop_player.stop()
return
logger.trace("Loop player state: {!r}", self._loop_player.state())
if (self._loop_sound.playback_threshold <= threshold
and self._loop_player.state() == QMediaPlayer.StoppedState):
logger.trace(
"Replaying sound: {!r} in loop player from stopped state")
self.play_sound(self._loop_sound)
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.player = QMediaPlayer()
self.playlist = QMediaPlaylist()
toolBar = QToolBar()
self.addToolBar(toolBar)
playIcon = self.style().standardIcon(QStyle.SP_MediaPlay)
previousIcon = self.style().standardIcon(QStyle.SP_MediaSkipBackward)
nextIcon = self.style().standardIcon(QStyle.SP_MediaSkipForward)
pauseIcon = self.style().standardIcon(QStyle.SP_MediaPause)
stopIcon = self.style().standardIcon(QStyle.SP_MediaStop)
self.playAction = toolBar.addAction(playIcon, "Play")
self.previousAction = toolBar.addAction(previousIcon, "Previous")
self.nextAction = toolBar.addAction(nextIcon, "Next")
self.pauseAction = toolBar.addAction(pauseIcon, "Pause")
self.stopAction = toolBar.addAction(stopIcon, "Stop")
self.playAction.triggered.connect(self.player.play)
self.previousAction.triggered.connect(self.previousClicked)
self.nextAction.triggered.connect(self.playlist.next)
self.pauseAction.triggered.connect(self.player.pause)
self.stopAction.triggered.connect(self.player.stop)
self.volSlider = QSlider()
self.volSlider.setOrientation(Qt.Horizontal)
self.volSlider.setMinimum(0)
self.volSlider.setMaximum(100)
self.volSlider.setFixedWidth(120)
self.volSlider.setValue(self.player.volume())
self.volSlider.setTickInterval(10)
self.volSlider.setTickPosition(QSlider.TicksBelow)
self.volSlider.setToolTip("Volume")
self.volSlider.valueChanged.connect(self.player.setVolume)
toolBar.addWidget(self.volSlider)
openAction = QAction(QIcon.fromTheme("document-open"),
"&Open...",
self,
shortcut=QKeySequence.Open,
triggered=self.open)
exitAction = QAction(QIcon.fromTheme("application-exit"),
"E&xit",
self,
shortcut="Ctrl+Q",
triggered=self.close)
aboutQtAct = QAction("About &Qt", self, triggered=qApp.aboutQt)
fileMenu = self.menuBar().addMenu("&File")
fileMenu.addAction(openAction)
fileMenu.addAction(exitAction)
playMenu = self.menuBar().addMenu("&Play")
playMenu.addAction(self.playAction)
playMenu.addAction(self.previousAction)
playMenu.addAction(self.nextAction)
playMenu.addAction(self.pauseAction)
playMenu.addAction(self.stopAction)
aboutMenu = self.menuBar().addMenu("&About")
aboutMenu.addAction(aboutQtAct)
self.videoWidget = QVideoWidget()
self.setCentralWidget(self.videoWidget)
self.player.setPlaylist(self.playlist)
self.player.stateChanged.connect(self.updateButtons)
self.player.setVideoOutput(self.videoWidget)
self.updateButtons(self.player.state())
def open(self):
fileDialog = QFileDialog(self)
supportedMimeTypes = ["video/mp4", "*.*"]
fileDialog.setMimeTypeFilters(supportedMimeTypes)
moviesLocation = QStandardPaths.writableLocation(
QStandardPaths.MoviesLocation)
fileDialog.setDirectory(moviesLocation)
if fileDialog.exec_() == QDialog.Accepted:
self.playlist.addMedia(fileDialog.selectedUrls()[0])
self.player.play()
def previousClicked(self):
if self.player.position() <= 5000:
self.playlist.previous()
else:
player.setPosition(0)
def updateButtons(self, state):
mediaCount = self.playlist.mediaCount()
self.playAction.setEnabled(mediaCount > 0
and state != QMediaPlayer.PlayingState)
self.pauseAction.setEnabled(state == QMediaPlayer.PlayingState)
self.stopAction.setEnabled(state != QMediaPlayer.StoppedState)
self.previousAction.setEnabled(self.player.position() > 0)
self.nextAction.setEnabled(mediaCount > 1)
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.playlist = QMediaPlaylist()
self.player = QMediaPlayer()
toolBar = QToolBar()
self.addToolBar(toolBar)
fileMenu = self.menuBar().addMenu("&File")
openAction = QAction(QIcon.fromTheme("document-open"),
"&Open...", self, shortcut=QKeySequence.Open,
triggered=self.open)
fileMenu.addAction(openAction)
exitAction = QAction(QIcon.fromTheme("application-exit"), "E&xit",
self, shortcut="Ctrl+Q", triggered=self.close)
fileMenu.addAction(exitAction)
playMenu = self.menuBar().addMenu("&Play")
playIcon = self.style().standardIcon(QStyle.SP_MediaPlay)
self.playAction = toolBar.addAction(playIcon, "Play")
self.playAction.triggered.connect(self.player.play)
playMenu.addAction(self.playAction)
previousIcon = self.style().standardIcon(QStyle.SP_MediaSkipBackward)
self.previousAction = toolBar.addAction(previousIcon, "Previous")
self.previousAction.triggered.connect(self.previousClicked)
playMenu.addAction(self.previousAction)
pauseIcon = self.style().standardIcon(QStyle.SP_MediaPause)
self.pauseAction = toolBar.addAction(pauseIcon, "Pause")
self.pauseAction.triggered.connect(self.player.pause)
playMenu.addAction(self.pauseAction)
nextIcon = self.style().standardIcon(QStyle.SP_MediaSkipForward)
self.nextAction = toolBar.addAction(nextIcon, "Next")
self.nextAction.triggered.connect(self.playlist.next)
playMenu.addAction(self.nextAction)
stopIcon = self.style().standardIcon(QStyle.SP_MediaStop)
self.stopAction = toolBar.addAction(stopIcon, "Stop")
self.stopAction.triggered.connect(self.player.stop)
playMenu.addAction(self.stopAction)
self.volumeSlider = QSlider()
self.volumeSlider.setOrientation(Qt.Horizontal)
self.volumeSlider.setMinimum(0)
self.volumeSlider.setMaximum(100)
self.volumeSlider.setFixedWidth(app.desktop().availableGeometry(self).width() / 10)
self.volumeSlider.setValue(self.player.volume())
self.volumeSlider.setTickInterval(10)
self.volumeSlider.setTickPosition(QSlider.TicksBelow)
self.volumeSlider.setToolTip("Volume")
self.volumeSlider.valueChanged.connect(self.player.setVolume)
toolBar.addWidget(self.volumeSlider)
aboutMenu = self.menuBar().addMenu("&About")
aboutQtAct = QAction("About &Qt", self, triggered=qApp.aboutQt)
aboutMenu.addAction(aboutQtAct)
self.videoWidget = QVideoWidget()
self.setCentralWidget(self.videoWidget)
self.player.setPlaylist(self.playlist)
self.player.stateChanged.connect(self.updateButtons)
self.player.setVideoOutput(self.videoWidget)
self.updateButtons(self.player.state())
def open(self):
fileDialog = QFileDialog(self)
supportedMimeTypes = QMediaPlayer.supportedMimeTypes()
if not supportedMimeTypes:
supportedMimeTypes.append("video/x-msvideo") # AVI
fileDialog.setMimeTypeFilters(supportedMimeTypes)
moviesLocation = QStandardPaths.writableLocation(QStandardPaths.MoviesLocation)
fileDialog.setDirectory(moviesLocation)
if fileDialog.exec_() == QDialog.Accepted:
self.playlist.addMedia(fileDialog.selectedUrls()[0])
self.player.play()
def previousClicked(self):
# Go to previous track if we are within the first 5 seconds of playback
# Otherwise, seek to the beginning.
if self.player.position() <= 5000:
self.playlist.previous()
else:
player.setPosition(0)
def updateButtons(self, state):
mediaCount = self.playlist.mediaCount()
self.playAction.setEnabled(mediaCount > 0
and state != QMediaPlayer.PlayingState)
self.pauseAction.setEnabled(state == QMediaPlayer.PlayingState)
self.stopAction.setEnabled(state != QMediaPlayer.StoppedState)
self.previousAction.setEnabled(self.player.position() > 0)
self.nextAction.setEnabled(mediaCount > 1)