cd_logic.py

   1 """
   2         cd_logic.py
   3                 Uses the CD library to control the CD and return it's status.
   4
   5         Copyright 2003 Ron Kuslak <rds@rdsarts.com>
   6                 All rights reserved.
   7
   8         This program is free software; you can redistribute it and/or modify
   9         it under the terms of the GNU General Public License as published by
  10         the Free Software Foundation; either version 2 of the License.
  11
  12         This program is distributed in the hope that it will be useful
  13         but WITHOUT ANY WARRANTY; without even the implied warranty of
  14         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15         GNU General Public License for more details.
  16
  17         You should have received a copy of the GNU General Public License
  18         along with this program; if not, write to the Free Software
  19         Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20 """
  21 import CDLow as cd
  22
  23 updated = False
  24
  25 def set_dev(dev='/dev/cdrom'):
  26         """ Changes the CD device. Makes change. Dances poorly. """
  27         cd.cd_close()
  28         cd.cd.path = str(dev)
  29         cd.cd_open()
  30         updated = False
  31         return
  32
  33 def get_disc_id():
  34         temp = cd.get_tracks_id()
  35         id = temp['id']
  36         return int(id[0])
  37
  38 def get_cddb_id():
  39         temp = cd.get_tracks_id()
  40         id = temp['id']
  41         return id
  42
  43 def get_track_time():
  44         min, sec, temp = cd.get_status(1)['rel']
  45         return ((min * 60) + sec)
  46
  47 def get_track_time_total(track=None):
  48         if not track: track = current_track()
  49         t1, t2, t3, min, sec, t4, t5, t6 = cd.get_track_length(track)
  50         return ((min * 60) + sec)
  51
  52 def get_dev():
  53         return str(cd.cd.path)
  54
  55 def check_dev():
  56         # print cd.get_drive_status()
  57         try:
  58                 return cd.get_drive_status()
  59         except IOError, err:
  60                 print "IOError. Passing 0. Error was " + str(err)
  61                 return -1
  62
  63 def total_tracks():
  64         #try:
  65         return cd.get_tracks_id()['end_t']
  66         # return int(cd_info['end_t'])
  67         #except :
  68         #       return 0
  69         #excect: # We should not reach here!
  70         #       print 'ERROR IN cd.py - total_tracks(). Please report this error.'
  71         #       return
  72
  73 def current_track():
  74         # try:
  75                 temp = cd.get_status(1)
  76                 return int(temp['cur_t'])
  77         # except:
  78                 return -1
  79 def update():
  80         try:
  81                 status = cd.get_status()
  82         except:
  83                 status = 0
  84
  85         if status == 0:
  86                 updated = True
  87
  88 def get_status():
  89         """ Returns CD's playing state. Yes, this is just a wrapper around
  90             get_status. DEAL. ;)"""
  91         try:
  92                 status = cd.get_status()
  93         except:
  94                 # print "Error in play_pause"
  95                 # # TODO: Do something. :P
  96                 return 0
  97         return status
  98
  99 def play(track = 1):
 100         cd.play(track, total_tracks())
 101
 102 def stop():
 103         cd.stop()
 104         update()
 105
 106 def eject():
 107         cd.eject()
 108         update()
 109
 110 def next():
 111         """     Advances CD one track, or puts it at track 1 if at last.        """
 112
 113         next = current_track() + 1
 114         last_t = total_tracks()
 115         if next < last_t:
 116                 play(next)
 117         else:
 118                 play(1)
 119         update()
 120         return 0
 121
 122 def prev():
 123         prev = current_track() - 1
 124
 125         if prev == 0:
 126                 prev = (total_tracks() - 1)
 127
 128         play(prev)
 129         update()
 130         return 0
 131
 132 def pause():
 133         cd.pause()
 134         update()
 135
 136 def jump(seconds):
 137         cd.skip(0, seconds)