class PlayAudioMenu(QWidget):
"""
This class creates a custom widget with the Play Audio Menu elements and layout.
"""
__metaclass__ = ABCMeta
def __init__(self, controller, parent=None):
"""
Constructor of the PlayAudioMenu class.
:param controller: GUIController object.
"""
super(PlayAudioMenu, self).__init__(parent)
self.controller = controller
self.db = RAM_DB()
backButton = Button_Back_PAM(self.controller).createButton(269, 100)
self.playButton = Button_Play_PAM(self.controller).createButton(60, 60)
self.pauseButton = Button_Pause_PAM(self.controller).createButton(
60, 60)
nextButton = Button_Next_PAM(self.controller).createButton(60, 60)
previousButton = Button_Previous_PAM(self.controller).createButton(
60, 60)
(self.fileName, self.pathFiles,
self.metaDataList) = self.db.getAudioDB()
path = self.pathFiles[self.db.getSelection()]
audioController = AudioController()
self.audioObject = audioController.getAudioObject()
self.textLabel = CustomLabel().createLabel(path, Qt.AlignCenter)
self.actualTimeLabel = CustomLabel().createLabel(
"00:00", Qt.AlignCenter)
self.totalTimeLabel = CustomLabel().createLabel(
"00:00", Qt.AlignCenter)
self.timeSlider = TimeSlider(0, 100, 0, self.sliderValueChangedByUser)
verticalBoxLayout = QVBoxLayout()
hRepTimeBox = QHBoxLayout()
hRepButtonsBox = QHBoxLayout()
hImageBox = QHBoxLayout()
hButtonsMenuBox = QHBoxLayout()
verticalBoxLayout.setContentsMargins(0, 0, 0, 0)
verticalBoxLayout.addStretch()
verticalBoxLayout.addStretch()
verticalBoxLayout.addWidget(self.textLabel)
verticalBoxLayout.addStretch()
hImageBox.addStretch()
self.imgQLabel = QLabel()
self.imgQLabel.setMaximumHeight(150)
self.imgQLabel.setMaximumWidth(150)
self.pixmapCover = QPixmap()
loaded = self.pixmapCover.load(
getArtworkPath(self.metaDataList[self.db.getSelection()]))
if (loaded == False):
self.pixmapCover.load(self.db.getArtworkNotFoundPath())
self.imgQLabel.setPixmap(self.pixmapCover.scaled(150, 150))
hImageBox.addWidget(self.imgQLabel)
hImageBox.addStretch()
verticalBoxLayout.addLayout(hImageBox)
verticalBoxLayout.addStretch()
hRepTimeBox.addWidget(self.actualTimeLabel)
hRepTimeBox.addStretch()
hRepTimeBox.addWidget(self.totalTimeLabel)
verticalBoxLayout.addLayout(hRepTimeBox)
verticalBoxLayout.addWidget(self.timeSlider)
verticalBoxLayout.addStretch()
hRepButtonsBox.addStretch()
if (self.audioObject.getStatus() == AudioStatus.PAUSED):
self.pauseButton.hide()
else:
self.playButton.hide()
hRepButtonsBox.addWidget(previousButton)
hRepButtonsBox.addStretch()
hRepButtonsBox.addWidget(self.playButton)
hRepButtonsBox.addWidget(self.pauseButton)
hRepButtonsBox.addStretch()
hRepButtonsBox.addWidget(nextButton)
hRepButtonsBox.addStretch()
verticalBoxLayout.addLayout(hRepButtonsBox)
verticalBoxLayout.addStretch()
hButtonsMenuBox.addWidget(backButton)
hButtonsMenuBox.addStretch()
verticalBoxLayout.addLayout(hButtonsMenuBox)
self.setLayout(verticalBoxLayout)
def sliderValueChangedByUser(self):
"""
Method when the slider notifies a change in his value made by the user.
"""
self.audioObject.changeAudioSecond(self.timeSlider.getValue())
@abstractmethod
def update(self, *args, **kwargs):
"""
Update method of the observer pattern.
:param args: args
:param kwargs: kwargs
"""
self.updateView(*args, **kwargs)
def updateView(self, *args, arg1, arg2):
"""
Update view method of the observer pattern.
:param args: Name of the notification.
:param arg1: Other data.
:param arg2: Other data.
"""
if (args[0] == "NewMetaData"):
minutes = round((arg2[16] // 1000.0) // 60.0)
seconds = round((arg2[16] // 1000.0) % 60.0)
if minutes < 10:
strMinutes = "0" + str(minutes)
else:
strMinutes = str(minutes)
if seconds < 10:
strSeconds = "0" + str(seconds)
else:
strSeconds = str(seconds)
if arg2[1] == None:
titleText = "Artista desconocido" + " - " + arg2[0]
else:
titleText = arg2[1] + " - " + arg2[0]
self.textLabel.setText(titleText)
self.totalTimeLabel.setText(strMinutes + ":" + strSeconds)
self.timeSlider.setMaximum(arg2[16])
loaded = self.pixmapCover.load(
getArtworkPath(self.metaDataList[self.db.getSelection()]))
if (loaded == False):
self.pixmapCover.load(self.db.getArtworkNotFoundPath())
self.imgQLabel.setPixmap(self.pixmapCover.scaled(150, 150))
if (self.audioObject.getStatus() == AudioStatus.PAUSED):
self.pauseButton.hide()
self.playButton.show()
else:
self.playButton.hide()
self.pauseButton.show()
elif (args[0] == "AudioPaused"):
self.playButton.show()
self.pauseButton.hide()
elif (args[0] == "AudioResumed"):
self.playButton.hide()
self.pauseButton.show()
elif (args[0] == "UpdateReproductionSecond"):
minutes = round((arg1 // 1000) // 60)
seconds = round((arg1 // 1000)) % 60
if minutes < 10:
strMinutes = "0" + str(minutes)
else:
strMinutes = str(minutes)
if seconds < 10:
strSeconds = "0" + str(seconds)
else:
strSeconds = str(seconds)
self.actualTimeLabel.setText(strMinutes + ":" + strSeconds)
self.timeSlider.setValue(arg1)
class __AudioController:
def __init__(self):
"""
Constructor of the AudioController class.
"""
self.db = RAM_DB()
(self.fileName, self.pathFiles,
self.metaDataList) = self.db.getAudioDB()
self.path = None
self.audioObject = AudioFile(self.notifyController)
self.currentFMStation = None
self.SI4703 = SI4703()
self.playingRadio = False
self.observers = []
self.GUICoolDown = False
self.threadController = ThreadController()
###############################################################################
#OBSERVER PATTERN
###############################################################################
def register(self, observer):
"""
Register method of the observer pattern.
:param observer: Object to subscribe.
"""
if not observer in self.observers:
self.observers.append(observer)
def unregister(self, observer):
"""
Untegister method of the observer pattern.
:param observer: Object to unsubscribe.
"""
if observer in self.observers:
self.observers.remove(observer)
def unregister_all(self):
"""
Unsubscribe all the subscribers.
"""
if self.observers:
del self.observers[:]
def update_observers(self, *args, **kwargs):
"""
Notify to all the observers/subscribers.
:param args: args
:param kwargs: kwargs
"""
for observer in self.observers:
observer.update(*args, **kwargs)
###############################################################################
def getAudioObject(self):
"""
Returns the audio object, instance of the AudioFile class.
:return: Current Audio File instance.
"""
return self.audioObject
def loadAudio(self):
"""
Loads an audio file. (Plays it).
"""
if (self.playingRadio == True):
self.stopRadio()
if (self.audioObject.getStatus() == AudioStatus.NOFILE):
self.audioObject.playAudio()
else:
self.audioObject.stopAudio()
self.audioObject.playAudio()
self.update_observers(
"NewMetaData",
arg1=self.path,
arg2=self.metaDataList[self.db.getSelection()])
def startUpdateStatusThread(self):
"""
Starts a thread that updates the reproduction status by polling to the vlc lib.
"""
self.audioObject.startUpdateStatusThread()
self.update_observers(
"NewMetaData",
arg1=self.path,
arg2=self.metaDataList[self.db.getSelection()])
def nextTrack(self):
"""
Switch to the next track of the list.
"""
self.audioObject.stopAudio()
if (self.db.getSelection() + 1 < len(self.pathFiles)):
self.db.setSelection(self.db.getSelection() + 1)
else:
self.db.setSelection(0)
self.loadAudio()
def previousTrack(self):
"""
Switch to the previous track of the list.
"""
self.audioObject.stopAudio()
if (self.db.getSelection() - 1 >= 0):
self.db.setSelection(self.db.getSelection() - 1)
else:
self.db.setSelection(len(self.pathFiles) - 1)
self.loadAudio()
def nextTrackEvent(self):
"""
Manages the automatic change to the next track notifying to the GUI.
"""
if (self.db.getSelection() + 1 < len(self.pathFiles)):
self.db.setSelection(self.db.getSelection() + 1)
else:
self.db.setSelection(0)
self.path = self.pathFiles[self.db.getSelection()]
self.update_observers(
"NewMetaData",
arg1=self.path,
arg2=self.metaDataList[self.db.getSelection()])
def pause(self):
"""
Pauses the audio.
"""
self.audioObject.pauseAudio()
self.update_observers("AudioPaused", arg1=None, arg2=None)
def resume(self):
"""
Resumes a paused audio.
"""
self.audioObject.resumeAudio()
self.update_observers("AudioResumed", arg1=None, arg2=None)
def changeAudioSecond(self, second):
"""
Changes the current reproduction second to another second.
:param second: New current second.
"""
self.audioObject.changeAudioSecond(second)
def updateReproductionSecondEvent(self, second):
"""
Send an event to the observers when the current reproduction second changes.
"""
self.update_observers("UpdateReproductionSecond",
arg1=second,
arg2=None)
def initRadio(self):
"""
Initialize the radio module if it's stopped.
"""
if self.playingRadio == False:
#STOP the reproduction of Audio
if self.audioObject.getStatus() != AudioStatus.NOFILE:
self.audioObject.stopAudio()
#Init the radio
if (self.currentFMStation == None):
self.currentFMStation = 92.3
self.update_observers("UpdateCurrentFMFrequency",
arg1=self.currentFMStation,
arg2=None)
self.startGUICoolDown(3)
self.SI4703.initRadio()
self.SI4703.setVolume(15)
self.SI4703.setChannel(self.currentFMStation)
self.playingRadio = True
def stopRadio(self):
"""
Stops the radio module if it's working.
"""
if self.playingRadio == True:
self.SI4703.stopRadio()
self.playingRadio = False
def setCurrentFMFrequency(self, frequency):
"""
Changes the tuned frequency of the radio module.
:param frequency: New frequency to tune.
"""
if (frequency >= 87.5 and frequency <= 108):
self.currentFMStation = frequency
self.update_observers("UpdateCurrentFMFrequency",
arg1=self.currentFMStation,
arg2=None)
self.SI4703.setChannel(self.currentFMStation)
def getCurrentFMFrequency(self):
"""
Returns the current tuned frequency.
:return currentFMStation: Current tuned frequency.
"""
return self.currentFMStation
def getCurrentFMStationName(self):
"""
Returns the name of the FM station (actually the frequency as string)
:return currentFMStation: Current tuned frequency as string.
"""
return str(self.currentFMStation)
def updateRadioObservers(self):
"""
Update all the observers related to the radio module.
"""
self.update_observers("UpdateCurrentFMFrequency",
arg1=self.currentFMStation,
arg2=None)
self.update_observers("UpdateRadioChannelData",
arg1=None,
arg2=None)
def nextFrequency(self):
"""
Changes to the next frequency.
"""
if (self.currentFMStation >= 87.5 and self.currentFMStation < 108):
self.currentFMStation = round(self.currentFMStation + 0.1, 2)
self.update_observers("UpdateCurrentFMFrequency",
arg1=self.currentFMStation,
arg2=None)
def previousFrequency(self):
"""
Changes to the previous frequency.
"""
if (self.currentFMStation > 87.5 and self.currentFMStation <= 108):
self.currentFMStation = round(self.currentFMStation - 0.1, 2)
self.update_observers("UpdateCurrentFMFrequency",
arg1=self.currentFMStation,
arg2=None)
def startChangeFrequencyThread(self):
"""
Starts the thread launched when we change between frequencies manually.
"""
if (self.threadController.getChangeFrequencyThread() != None):
self.threadController.getChangeFrequencyThread().stop()
self.threadController.setChangeFrequencyThread(None)
self.changeFrequencyThread = ChangeFrequencyThread(
0.5, self.currentFMStation, self.setCurrentFMFrequency,
self.startGUICoolDown)
self.threadController.setChangeFrequencyThread(
self.changeFrequencyThread)
self.threadController.getChangeFrequencyThread().start()
def seekUp(self):
"""
Seek up a new FM station.
"""
self.SI4703.seekUp(self.notifyController)
def seekDown(self):
"""
Seek down a new FM station.
"""
self.SI4703.seekDown(self.notifyController)
def setGUICoolDown(self, state):
"""
Sets the status of the cooldown of the GUI.
:param state: State of the cooldown.
"""
if (state == False):
self.update_observers("CoolDownEnded", arg1=None, arg2=None)
self.GUICoolDown = state
def getGUICoolDown(self):
"""
Returns the state of the cooldown of the GUI.
:return GUICoolDown: Status of the cooldown of the GUI.
"""
return self.GUICoolDown
def startGUICoolDown(self, ms=0.5):
"""
Starts the cooldown of the GUI when the radio module is busy.
:param ms: Duration of the cooldown.
"""
self.update_observers("CoolDownStarted", arg1=None, arg2=None)
buttonCoolDownThread = ButtonCoolDownThread(
ms, self.setGUICoolDown)
buttonCoolDownThread.start()
def getPlayingRadio(self):
"""
Returns if the radio is being played or not.
:return playingRadio: Status of the radio.
"""
return self.playingRadio
def getStatus(self):
"""
Returns the current status of the reproduction. See AudioStatus class.
:return: Current status.
"""
return self.audioObject.getStatus()
def notifyController(self, notify, var=0):
"""
Method that other classes uses to notifie to the AudioController of the changes.
:param notify: Kind of notification.
:param var: Attached var.
"""
if (notify == "nextTrack"):
self.nextTrackEvent()
elif (notify == "updateReproductionSecond"):
self.updateReproductionSecondEvent(var)
elif (notify == "endOfList"):
self.nextTrack()
elif (notify == "seekFrequencyChanged"):
self.currentFMStation = var
self.update_observers("UpdateCurrentFMFrequency",
arg1=self.currentFMStation,
arg2=None)
def __str__(self):
return repr(self) + self.val
class AudioFileVLC:
"""
Plays MP3/WAV or other supported files using the VLC lib.
"""
def __init__(self, notifyAudioController):
"""
Constructor of the AudioFileVLC class.
:param notifyAudioController: Method to notify of the changes to the Audio Controller.
"""
self.vlcInstance = vlc.Instance()
self.mediaPlayer = self.vlcInstance.media_player_new()
self.mediaList = self.vlcInstance.media_list_new()
self.listMediaPlayer = self.vlcInstance.media_list_player_new()
self.listMediaPlayer.set_media_player(self.mediaPlayer)
self.db = RAM_DB()
self.threadController = ThreadController()
(self.fileName, self.pathFiles, self.metaDataList) = self.db.getAudioDB()
self.notifyAudioController = notifyAudioController
#This boolean avoid to notify of unnecesary changes to the AudioController, works as a flag
self.avoidNotify = False
#This boolean avoid to stop the medialistplayer when is already stopped because have reached the end of the list.
self.reproductionEnded = False
for i in range(0, len(self.pathFiles)):
self.mediaList.insert_media(self.vlcInstance.media_new(self.pathFiles[i]), i)
self.listMediaPlayer.set_media_list(self.mediaList)
#For the VLC Event handler
self.vlc_eventsMediaList = self.listMediaPlayer.event_manager()
self.vlc_eventsMediaPlayer = self.mediaPlayer.event_manager()
self.vlc_eventsMediaPlayer.event_attach(vlc.EventType.MediaPlayerEndReached, self.endOfSong, 1)
self.vlc_eventsMediaList.event_attach(vlc.EventType.MediaListPlayerNextItemSet, self.nextItem, 1)
self.reproductionStatusThread = None
def playAudio(self):
"""
Plays an audio file.
"""
self.avoidNotify = True
self.listMediaPlayer.play_item_at_index(self.db.getSelection())
# We only starts the thread that make polling for gets the current reproduction second if the current menu is the PlayAudioMenu
if(self.db.getCurrentMenu() == "PlayAudioMenu"):
self.startUpdateStatusThread()
def startUpdateStatusThread(self):
"""
Starts a thread that updates the reproduction status by polling to the vlc lib.
"""
self.reproductionStatusThread = ReproductionStatusThread(self.mediaPlayer, self.notifyAudioController)
self.threadController.setReproductionStatusThread(self.reproductionStatusThread)
self.threadController.getReproductionStatusThread().start()
def pauseAudio(self):
"""
Pauses the audio.
"""
self.listMediaPlayer.pause()
def changeAudioSecond(self, second):
"""
Changes the current reproduction second to another second.
:param second: New current second.
"""
self.mediaPlayer.set_time(second)
def resumeAudio(self):
"""
Resumes a paused audio.
"""
self.listMediaPlayer.play()
def stopAudio(self):
"""
Stops the reproduction of an audio.
"""
if (self.threadController.getReproductionStatusThread() != None):
self.threadController.getReproductionStatusThread().stop()
# At the end of the list, VLC Lib makes a stop() to the media player list by default.
# If we make a stop() two times, it hangs
if (self.reproductionEnded == False):
self.listMediaPlayer.stop()
else:
self.reproductionEnded = False
def getPath(self):
"""
Returns the path of the file that it's being reproduced.
:return: String with the path.
"""
return self.path
def nextItem(self, *args, **kwds):
"""
Method called by the VLC event manager when the reproduction item has changed.
:param args: args
:param kwds: kwds
"""
if (self.avoidNotify == False):
self.notifyAudioController("nextTrack")
else:
self.avoidNotify = False
def endOfSong(self, *args, **kwds):
"""
Method called by the VLC event manager when the reproduction item ends.
:param args: args
:param kwds: kwds
"""
# If the song ended & is the last of the list, must notify to the controller
if self.db.getSelection() == (len(self.pathFiles)-1):
self.reproductionEnded = True
self.notifyAudioController("endOfList")
class __AudioFile:
def __init__(self, notifyAudioController):
"""
Constructor of the AudioFile class.
:param notifyAudioController: Method to notify of the changes to the Audio Controller.
"""
self.savedSecond = 0
self.status = AudioStatus.NOFILE
self.audioFileObject = None
self.db = RAM_DB()
self.notifyAudioController = notifyAudioController
(self.fileName, self.pathFiles,
self.metaDataList) = self.db.getAudioDB()
def playAudio(self):
"""
Plays the selected audio file, don't matter what kind of format.
"""
if (self.status == AudioStatus.NOFILE):
self.audioFileObject = self.__selectAudioType(
self.pathFiles[self.db.getSelection()])
self.audioFileObject.playAudio()
self.status = AudioStatus.PLAYING
elif (self.status == AudioStatus.PLAYING
or self.status == AudioStatus.PAUSED):
self.audioFileObject.stopAudio()
self.audioFileObject = self.__selectAudioType(
self.pathFiles[self.db.getSelection()])
self.audioFileObject.playAudio()
def pauseAudio(self):
"""
Pauses the current audio, managing it with the appropriate lib.
"""
self.audioFileObject.pauseAudio()
self.status = AudioStatus.PAUSED
"""
def resumeAudio(self, savedSecond):
Resumes the current audio, managing it with the appropriate lib.
:param savedSecond: Second from where it resumes the reproduction.
self.audioFileObject.resumeAudio(savedSecond)
self.status = AudioStatus.PLAYING
"""
def resumeAudio(self):
"""
Resumes the current audio, managing it with the appropriate lib.
"""
self.audioFileObject.resumeAudio()
self.status = AudioStatus.PLAYING
def changeAudioSecond(self, second):
"""
Changes the current reproduction second to another second.
:param second: New current second.
"""
self.audioFileObject.changeAudioSecond(second)
def stopAudio(self):
"""
Stops the reproduction of the current audio, managing it with the appropriate lib.
"""
self.status = AudioStatus.NOFILE
self.audioFileObject.stopAudio()
def startUpdateStatusThread(self):
"""
Starts a thread that updates the reproduction status by polling to the vlc lib.
"""
self.audioFileObject.startUpdateStatusThread()
def __selectAudioType(self, path):
"""
Private method that calls to the appropriate object depending on what kind of audio we want to reproduce.
(Polimorfism)
:param path: Path to the audio file.
:return: Audio object using the appropriate lib.
"""
if (path.endswith(".mp3") or path.endswith(".wav")):
audioType = AudioFileVLC(self.notifyAudioController)
return audioType
def getStatus(self):
"""
Returns the current status of the reproduction. See AudioStatus class.
:return: Current status.
"""
return self.status
def __str__(self):
return repr(self) + self.val