Cool!. Don't know if there are tools like that for other environments, but I think this could be used for controlling more sofisticated sound playing systems than the standard desktop application like those used for music events.
On 26 feb, 08:01, Luciano Pacheco <[email protected]> wrote: > Hi all, > > I have to control/manage/automatize a player (music) and I managed to do in > the following way. > > I posting here to get feedback and also I liked the solution, so it can be > useful for others. ;-) > > Firstly, I chose the mplayer as the player because of multi-platform and > multi-filetypes support. Also, it supports control commands in the stdin. I > have done the same technique using mpg123 as well. > > The idea: > > Run a class (subclass of threading.Thread) that its main loop stay polling > other process (mplyer or mpg123) and sends commands to them, also getting > data as current music, time elapsed and total time. > > Keep in mind that it is my first time playing/coding with threads :-) > > Ok! Show me the code! > > http://pastebin.com/9nhf6FK0 > The same below (who knows how long last a web service) :-) > > # file: player.py > > import threading > from subprocess import Popen, PIPE > from datetime import datetime > > class MPG123Player(threading.Thread): > daemon = True # added to make Ctrl-C and Ctrl-D work when running > python -i player.py > > def __init__(self, music=''): > self.music = music > threading.Thread.__init__(self) > self._kill_me = False > self.player = self.init_player() > > def finish_it(self): > self._kill_me = True > > def init_player(self): > return Popen(['mpg123', '--remote', self.music], shell=False, > stdout=PIPE, stdin=PIPE) > > def run(self): > '''Thread method that is called when a Thread is started, > this is the "main loop" of it''' > try: > self.player_loop() > finally: > self.quit() > > def play(self, music=''): > music = music or self.music > if music: > cmd = 'LOAD ' + music > self.player_cmd(cmd) > > def stop(self): > self.player_cmd('STOP') > > def player_cmd(self, cmd): > '''Protocol to talk to the mpg123 ''' > self.player.stdin.write(cmd + '\n') > > def quit(self): > self.player.terminate() > > def player_loop(self): > player = self.player > > self.play() > > while not self._kill_me: > status = player.stdout.readline() > '''here we have to keep reading the stdout, because if we don't > read from it this buffer get full and the mpg123 stops working. > > I give from it because of this issue, mplayer.py has a better > approach > ''' > #print status > if status.startswith('@F'): > cmd_name, cur_frame, frames_left, cur_seconds, > seconds_left = status.split() > if cmd_name == '@F' and cur_seconds == '0.00': > self.total_seconds = float(seconds_left) > cur_seconds = float(cur_seconds) > self.cur_seconds = cur_seconds > > class Mplayer(threading.Thread, BasePlayer): > daemon = True # added to make Ctrl-C and Ctrl-D work when running > python -i player.py > > def __init__(self, music=''): > threading.Thread.__init__(self) > > def init_player(self): > # it is using mplayer.py -https://github.com/baudm/mplayer.py > return mplayer.Player(stderr=subprocess.PIPE) > # but the basic idea is run the mplayer with this options, but > # mplayer.py has some convenient api > # > #return Popen(['mplayer', '-slave', '-idle', #'-msglevel', > 'global=4', > # '-quiet', 'nodefault-bindings', '-noconfig', 'all', > # self.music], shell=False, stdout=PIPE, stdin=PIPE, > # stderr=subprocess.STDOUT) > > def run(self): > try: > self.player_loop() > finally: > self.quit() > > def play(self, music=''): > music = music or self.music > if music: > cmd = self.player.loadfile(music) > def stop(self): > self.player.stop() > > def quit(self): > self.player.quit() > #self.player.terminate() > > def player_loop(self): > player = self.player > > while not self._kill_me: > self.total_seconds = player.length or 0.0 > self.cur_seconds = player.time_pos or 0.0 > > if (self.total_seconds - self.cur_seconds) <= 0.05: > # if it's about to finish the music dispatch the logic to > get > # the next music > print '[%s] ended:' % datetime.now(), player.filename > > player = Mplayer('/path/to/a/file/199.mp3') > #player = MPG123Player('199.mp3') > > player.start() > > # you can play with the player using python console > # python -i player.py > # >>> player.play('file') > # >>> player.stop() > # I put this file in my application/myapp/modules/player.py > # and in my controllers I can from player import player > # def index() > # return '%s of %s' % (player.cur_seconds, player.total_seconds) > > [], > > -- > Luciano Pacheco > blog.lucmult.com.br
