pymedia & wxpython 制作播放器播放时主窗口卡死，,#!/usr/bin/e

pymedia & wxpython 制作播放器播放时主窗口卡死，,#!/usr/bin/e

#!/usr/bin/env python# -*- coding: utf-8 -*-import wximport mp3class myplayerframe(wx.Frame):    def __init__(self, parent, id, title):        wx.Frame.__init__(self, parent, id, title.decode('utf-8'), pos= (500, 150),size= (300, 500), style= wx.DEFAULT_FRAME_STYLE^(wx.MAXIMIZE_BOX|wx.MINIMIZE_BOX))        self.bitmap= {'play_before' : wx.Bitmap('play_before.png', wx.BITMAP_TYPE_PNG),\                    'play_after' : wx.Bitmap('play_after.png', wx.BITMAP_TYPE_PNG),\                    'pause_before' : wx.Bitmap('pause_before.png', wx.BITMAP_TYPE_PNG), \                    'pause_after' : wx.Bitmap('pause_after.png', wx.BITMAP_TYPE_PNG),\                    'stop_before' : wx.Bitmap('stop_before.png', wx.BITMAP_TYPE_PNG),\                    'stop_after' : wx.Bitmap('stop_after.png', wx.BITMAP_TYPE_PNG)}        self.panel= wx.Panel(self)        self.panel.SetBackgroundColour('Pink')        self.bt_play= wx.BitmapButton(self.panel, -1, self.bitmap['play_before'], pos= (120, 10), size= (50, 50))        self.bt_pause= wx.BitmapButton(self.panel, -1, self.bitmap['pause_before'], pos= (60, 10), size= (50, 50))        self.bt_stop= wx.BitmapButton(self.panel, -1, self.bitmap['stop_before'], pos= (180, 10), size= (50, 50))        self.open_dlg= wx.FileDialog(self, message= "Open", style= wx.OPEN)        self.bt_play.Bind(wx.EVT_LEFT_DOWN, self.play_after)        self.bt_pause.Bind(wx.EVT_LEFT_DOWN, self.pause_after)        self.bt_stop.Bind(wx.EVT_LEFT_DOWN, self.stop_after)    def openfile(self, event):        self.open_dlg.ShowModal()    def play_after(self, event):        file= 'i cry.mp3'        mp3.playms(file)                self.bt_play= wx.BitmapButton(self.panel, -1, self.bitmap['play_after'], pos= (120, 10), size= (50, 50))        event.Skip()            def pause_after(self, event):        self.bt_pause= wx.BitmapButton(self.panel, -1, self.bitmap['pause_after'], pos= (60, 10), size= (50, 50))        event.Skip()    def stop_after(self, event):        self.bt_stop= wx.BitmapButton(self.panel, -1, self.bitmap['stop_after'], pos= (180,10), size= (50, 50))        event.Skip()class myplayer(wx.App):    def OnInit(self):        myplayerframe(parent= None, id= -1, title= 'SPlayer').Show()        return Trueif __name__ == '__main__':    myplayer().MainLoop()

接下来是mp3.py

#-*-coding: utf-8-*-import pymediaimport pymedia.muxer as muxerimport pymedia.audio.acodec as acodecimport pymedia.audio.sound as soundimport timedef check_types(f):    sound_type = f.split('.')[-1]    print sound_type    return sound_typedef playms(file):    #1.二进制方法读取前 10000 个字节，保证能读到第一帧音频数据    ms = open(file, 'rb')    data = ms.read(100000)    #2.创建合成器对象，解析出最初的几帧音频数据    dm = muxer.Demuxer(check_types(file))    frames = dm.parse(data)    #3.根据解析出来的 Mp3 编码信息，创建解码器对象    dec = acodec.Decoder(dm.streams[0])    #像下面这样也行    #params = {'id': acodec.getCodecID('mp3'), 'bitrate': 128000, 'sample_rate': 44100, 'ext': 'mp3', 'channels': 2}    #dec= acodec.Decoder(params)    #4.解码第一帧音频数据    frame = frames[0]    #音频数据在 frame 数组的第二个元素中    r = dec.decode(frame[1])    #注意：这一步可以直接解码 r=dec.decode( data)，而不用读出第一帧音频数据    #但是开始会有一下噪音，如果是网络流纯音频数据，不包含标签信息，则不会出现杂音    #5.创建音频输出对象    snd = sound.Output(r.sample_rate, r.channels, sound.AFMT_S16_LE)    #6.播放    if r:        snd.play(r.data)    #7.继续读取、解码、播放        while True:            data = ms.read(512)            if len(data) > 0:                r = dec.decode(data)                if r:                    snd.play(r.data)            else:                break    #8.延时，直到播放完毕    while snd.isPlaying():        time.sleep(.5)

但是播放时主窗口卡住，只有播放完毕之后才可以再对窗体操作
请问各位这个怎么解决

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