Python媒體播放器播放列表

Question

我開始製作可支持三大平臺（Windows，Linux，Unix）的可自定義媒體播放器的項目。我實際上在這個項目中發現了一些在線源代碼，但我想添加播放列表等功能，但不確定從哪裏開始。我的項目如何創建播放列表的首要任何建議？

資源：http://www.blog.pythonlibrary.org/2010/07/24/wxpython-creating-a-simple-media-player/

下面是媒體播放器的代碼：

import os 
import time 
import wx 
import MplayerCtrl as mpc 
import wx.lib.buttons as buttons 

dirName = os.path.dirname(os.path.abspath(__file__)) 
bitmapDir = os.path.join(dirName, 'bitmaps') 

class Frame(wx.Frame): 

    #---------------------------------------------------------------------- 
    def __init__(self, parent, id, title, mplayer): 
     wx.Frame.__init__(self, parent, id, title) 
     self.panel = wx.Panel(self) 

     sp = wx.StandardPaths.Get() 
     self.currentFolder = sp.GetDocumentsDir() 
     self.currentVolume = 50 

     self.create_menu() 

     # create sizers 
     mainSizer = wx.BoxSizer(wx.VERTICAL) 
     controlSizer = self.build_controls() 
     sliderSizer = wx.BoxSizer(wx.HORIZONTAL) 

     self.mplayer = mpc.MplayerCtrl(self.panel, -1, mplayer) 
     self.playbackSlider = wx.Slider(self.panel, size=wx.DefaultSize) 
     sliderSizer.Add(self.playbackSlider, 1, wx.ALL|wx.EXPAND, 5) 

     # create volume control 
     self.volumeCtrl = wx.Slider(self.panel) 
     self.volumeCtrl.SetRange(0, 100) 
     self.volumeCtrl.SetValue(self.currentVolume) 
     self.volumeCtrl.Bind(wx.EVT_SLIDER, self.on_set_volume) 
     controlSizer.Add(self.volumeCtrl, 0, wx.ALL, 5) 

     # create track counter 
     self.trackCounter = wx.StaticText(self.panel, label="00:00") 
     sliderSizer.Add(self.trackCounter, 0, wx.ALL|wx.CENTER, 5) 

     # set up playback timer 
     self.playbackTimer = wx.Timer(self) 
     self.Bind(wx.EVT_TIMER, self.on_update_playback) 

     mainSizer.Add(self.mplayer, 1, wx.ALL|wx.EXPAND, 5) 
     mainSizer.Add(sliderSizer, 0, wx.ALL|wx.EXPAND, 5) 
     mainSizer.Add(controlSizer, 0, wx.ALL|wx.CENTER, 5) 
     self.panel.SetSizer(mainSizer) 

     self.Bind(mpc.EVT_MEDIA_STARTED, self.on_media_started) 
     self.Bind(mpc.EVT_MEDIA_FINISHED, self.on_media_finished) 
     self.Bind(mpc.EVT_PROCESS_STARTED, self.on_process_started) 
     self.Bind(mpc.EVT_PROCESS_STOPPED, self.on_process_stopped) 

     self.Show() 
     self.panel.Layout() 

    #---------------------------------------------------------------------- 
    def build_btn(self, btnDict, sizer): 
     """""" 
     bmp = btnDict['bitmap'] 
     handler = btnDict['handler'] 

     img = wx.Bitmap(os.path.join(bitmapDir, bmp)) 
     btn = buttons.GenBitmapButton(self.panel, bitmap=img, 
             name=btnDict['name']) 
     btn.SetInitialSize() 
     btn.Bind(wx.EVT_BUTTON, handler) 
     sizer.Add(btn, 0, wx.LEFT, 3) 

    #---------------------------------------------------------------------- 
    def build_controls(self): 
     """ 
     Builds the audio bar controls 
     """ 
     controlSizer = wx.BoxSizer(wx.HORIZONTAL) 

     btnData = [{'bitmap':'player_pause.png', 
        'handler':self.on_pause, 'name':'pause'}, 
        {'bitmap':'player_stop.png', 
        'handler':self.on_stop, 'name':'stop'}] 
     for btn in btnData: 
      self.build_btn(btn, controlSizer) 

     return controlSizer 

    #---------------------------------------------------------------------- 
    def create_menu(self): 
     """ 
     Creates a menu 
     """ 
     menubar = wx.MenuBar() 
     fileMenu = wx.Menu() 
     add_file_menu_item = fileMenu.Append(wx.NewId(), "&Add File", "Add Media File") 
     menubar.Append(fileMenu, '&File') 

     self.SetMenuBar(menubar) 
     self.Bind(wx.EVT_MENU, self.on_add_file, add_file_menu_item) 

    #---------------------------------------------------------------------- 
    def on_add_file(self, event): 
     """ 
     Add a Movie and start playing it 
     """ 
     wildcard = "Media Files (*.*)|*.*" 
     dlg = wx.FileDialog(
      self, message="Choose a file", 
      defaultDir=self.currentFolder, 
      defaultFile="", 
      wildcard=wildcard, 
      style=wx.OPEN | wx.CHANGE_DIR 
      ) 
     if dlg.ShowModal() == wx.ID_OK: 
      path = dlg.GetPath() 
      self.currentFolder = os.path.dirname(path[0]) 
      trackPath = '"%s"' % path.replace("\\", "/") 
      self.mplayer.Loadfile(trackPath) 
      t_len = self.mplayer.GetTimeLength() 
      print t_len 
      self.playbackSlider.SetRange(0, t_len) 
      self.playbackTimer.Start(100) 

    #---------------------------------------------------------------------- 
    def on_media_started(self, event): 
     print 'Media started!' 

    #---------------------------------------------------------------------- 
    def on_media_finished(self, event): 
     print 'Media finished!' 
     self.playbackTimer.Stop() 

    #---------------------------------------------------------------------- 
    def on_pause(self, event): 
     """""" 
     if self.playbackTimer.IsRunning(): 
      print "pausing..." 
      self.mplayer.Pause() 
      self.playbackTimer.Stop() 
     else: 
      print "unpausing..." 
      self.mplayer.Pause() 
      self.playbackTimer.Start() 

    #---------------------------------------------------------------------- 
    def on_process_started(self, event): 
     print 'Process started!' 

    #---------------------------------------------------------------------- 
    def on_process_stopped(self, event): 
     print 'Process stopped!' 

    #---------------------------------------------------------------------- 
    def on_set_volume(self, event): 
     """ 
     Sets the volume of the music player 
     """ 
     self.currentVolume = self.volumeCtrl.GetValue() 
     self.mplayer.SetProperty("volume", self.currentVolume) 

    #---------------------------------------------------------------------- 
    def on_stop(self, event): 
     """""" 
     print "stopping..." 
     self.mplayer.Stop() 
     self.playbackTimer.Stop() 

    #---------------------------------------------------------------------- 
    def on_update_playback(self, event): 
     """ 
     Updates playback slider and track counter 
     """ 
     try: 
      offset = self.mplayer.GetTimePos() 
     except: 
      return 
     print offset 
     mod_off = str(offset)[-1] 
     if mod_off == '0': 
      print "mod_off" 
      offset = int(offset) 
      self.playbackSlider.SetValue(offset) 
      secsPlayed = time.strftime('%M:%S', time.gmtime(offset)) 
      self.trackCounter.SetLabel(secsPlayed)   

#---------------------------------------------------------------------- 
if __name__ == "__main__": 
    import os, sys 

    paths = [r'C:\MPlayer-rtm-svn-31170\mplayer.exe', 
      r'E:\MPlayer-rtm-svn-31170\mplayer.exe'] 
    mplayerPath = None 
    for path in paths: 
     if os.path.exists(path): 
      mplayerPath = path 

    if not mplayerPath: 
     print "mplayer not found!" 
     sys.exit() 

    app = wx.App(redirect=False) 
    frame = Frame(None, -1, 'MediaPlayer Using MplayerCtrl', mplayerPath) 
    app.MainLoop() 

Answer 1

這實際上是一個功能，我想添加到自己。我會做的是創建一個新的框架或對話框與一個ListCtrl（或更確切的ObjectListView），並使用添加/刪除按鈕來添加和刪除軌道。您可以將路徑保存爲純文本文件，並使用您認爲合適的擴展名，然後從中加載ListCtrl。我希望這一切都有道理。