mpd_ctrl_zero.py

#!/usr/bin/python
#-*- coding: utf-8 -*-
u'''
http://www.rpiblog.com/2012/09/using-gpio-of-raspberry-pi-to-blink-led.html
https://github.com/if1live/rpi-mpd-controller
http://nw-electric.way-nifty.com/blog/2014/01/volumio-1ad0.html
'''

'''
sudo apt-get update
sudo apt-get -y install python-rpi.gpio python-daemon
'''

import RPi.GPIO as GPIO
import time
import commands
import re
import json
#import subprocess

#from daemon import daemon 
#from daemon.pidlockfile import PIDLockFile  

PIN_PREV_BTN = 7
PIN_PLAY_BTN = 11
PIN_NEXT_BTN = 13
PIN_STOP_BTN = 32
PIN_VOL_UP_BTN = 33
PIN_VOL_DW_BTN = 31

class Player(object):
    def __init__(self):
        self.re_play = re.compile(r'^\[playing\].+$')
        self.re_vol = re.compile(r'^volume:.+% .+$')
        self.play_state = self.is_playing()
        self.shutdown_timer = 0

    def sdtimer(self):
        if self.shutdown_timer is not 0:
            self.shutdown_timer -= 1


    def is_playing(self):
#        result = commands.getstatusoutput('mpc')
#        result = commands.getstatusoutput('mpc')
        result = commands.getstatusoutput('volumio status')
#        line_list = result[1].splitlines()

        playing = False
#        for line in line_list:
#            if self.re_play.match(line) is not None:
#                playing = True
        try:
            js = json.loads(result[1])
        except:
            js = None
        playing = js and (js['status'] == 'play')

        self.play_state = playing

#        for line in line_list:
#            if self.re_vol.match(line) is None:
#                self.vol_state = False
##                print '## vol False'
#            else:
#                self.vol_state = True
##                print '## vol True'
        self.vol_state = (js and js['volume']) is not None

        return playing

    def play(self,cmd):
        if self.is_playing():
#        if self.play_state is True:
#            retval = commands.getoutput('mpc pause')
            retval = commands.getoutput('volumio pause')
            self.play_state = False
            print '#pause'
        else:
#            retval = commands.getoutput('mpc play')
            retval = commands.getoutput('volumio play')
            self.play_state = True
            print '#play'
        print retval

#        result = commands.getstatusoutput('mpc')
#        line_list = retval[1].splitlines()
#        for line in line_list:
#            if self.re_vol.match(line) is None:
#                self.vol_state = False
#                print '### vol False'
#            else:
#                self.vol_state = True
#                print '### vol True'

    def prev(self,cmd):
        if cmd is 2:
            retval = commands.getoutput('ifconfig wlan0 down')
            print '##ifconfig wlan0 down '
            time.sleep(1)
            retval = commands.getoutput('systemctl stop hostapd')
            print '##systemctl stop hostapd'
#            print retval
        else:
#            retval = commands.getoutput('mpc prev')
            retval = commands.getoutput('volumio previous')
            print '#prev'
            print retval

    def next(self,cmd):
        if cmd is 2:
            retval = commands.getoutput('ifconfig wlan0 up')
            print '##ifconfig wlan0 up '
#            print retval
            time.sleep(5)
#            retval = subprocess.check_output('/usr/sbin/hostapd /etc/hostapd/hostapd.conf', shell=True)
            retval = commands.getoutput('systemctl start hostapd')
#            print retval
            print '##systemctl start hostapd'
        else:
#            retval = commands.getoutput('mpc next')
            retval = commands.getoutput('volumio next')
            print '#next'
            print retval

    def stop(self,cmd):
        if cmd is 2:
            retval = commands.getoutput('shutdown -h now')
        else:
#            retval = commands.getoutput('mpc stop')
            retval = commands.getoutput('volumio stop')
            print '#stop'
            print retval

    def volup(self,cmd):
        if self.vol_state is True:
#            retval = commands.getoutput('mpc volume +2') # for general
#            retval = commands.getoutput('amixer -c 1 sset SoftMaster 1%+') # for volumio2
            retval = commands.getoutput('volumio volume plus')
            print '#vol up'
            print retval

    def voldw(self,cmd):
        if self.vol_state is True:
#            retval = commands.getoutput('mpc volume -2')# for general
#            retval = commands.getoutput('amixer -c 1 sset SoftMaster 1%-') # for volumio2
            retval = commands.getoutput('volumio volume minus')
            print '#vol dw'
            print retval

class Button(object):
    def __init__(self, pin, func):
        self.pin = pin
        self.old_state = 1
        self.func = func
        self.up_timer = 0
        GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)

    def update(self):
        curr_state = GPIO.input(self.pin)
        if self.old_state is 1 and curr_state is 0:
            self.func(1)
            self.up_timer = 0
        if self.old_state is 0 and curr_state is 0:
            self.up_timer += 1
            if self.up_timer > 20:
                self.func(2)
                self.up_timer = 18
        self.old_state = curr_state


def main():
#    GPIO.cleanup()
    GPIO.setmode(GPIO.BOARD)
    GPIO.setwarnings(False)


    player = Player()

    prev_btn = Button(PIN_PREV_BTN, lambda x: player.prev(x))
    play_btn = Button(PIN_PLAY_BTN, lambda x: player.play(x))
    next_btn = Button(PIN_NEXT_BTN, lambda x: player.next(x))
    stop_btn = Button(PIN_STOP_BTN, lambda x: player.stop(x))
    voldw_btn = Button(PIN_VOL_DW_BTN, lambda x: player.voldw(x))
    volup_btn = Button(PIN_VOL_UP_BTN, lambda x: player.volup(x))

    while True:
        prev_btn.update()
        play_btn.update()
        next_btn.update()
        stop_btn.update()
        voldw_btn.update()
        volup_btn.update()
        player.sdtimer()
        time.sleep(0.05)

if __name__ == '__main__':
#    with daemon.DaemonContext(pidfile=PIDLockFile('/var/run/mpd_ctrl.pid')):
        main()
        GPIO.cleanup()