config.py

   1 import ConfigParser, os
   2 import re
   3 from ConfigParser import NoOptionError
   4
   5 BLACKLIST_169 = ('540', '649')
   6
   7 config = ConfigParser.ConfigParser()
   8 p = os.path.dirname(__file__)
   9 config.read(os.path.join(p, 'pyTivo.conf'))
  10
  11 def getGUID():
  12     if config.has_option('Server', 'GUID'):
  13         guid = config.get('Server', 'GUID')
  14     else:
  15         guid = '123456'
  16     return guid
  17
  18 def getBeaconAddresses():
  19     if config.has_option('Server', 'beacon'):
  20         beacon_ips = config.get('Server', 'beacon')
  21     else:
  22         beacon_ips = '255.255.255.255'
  23     return beacon_ips
  24
  25 def getPort():
  26     return config.get('Server', 'Port')
  27
  28 def get169Setting(tsn):
  29     if not tsn:
  30         return True
  31
  32     if config.has_section('_tivo_' + tsn):
  33         if config.has_option('_tivo_' + tsn, 'aspect169'):
  34             try:
  35                 return config.getboolean('_tivo_' + tsn, 'aspect169')
  36             except ValueError:
  37                 pass
  38
  39     if tsn[:3] in BLACKLIST_169:
  40         return False
  41
  42     return True
  43
  44 def getShares():
  45     shares = [ (section, dict(config.items(section))) for section in config.sections() if not(section.startswith('_tivo_') or section == 'Server') ]
  46
  47     for name, data in shares:
  48         if not data.get('auto_subshares', 'False').lower() == 'true':
  49             continue
  50
  51         base_path = data['path']
  52         for item in os.listdir(base_path):
  53             item_path = os.path.join(base_path, item)
  54             if not os.path.isdir(item_path):
  55                 continue
  56
  57             new_name = name + '/' + item
  58             new_data = dict(data)
  59             new_data['path'] = item_path
  60
  61             shares.append( (new_name, new_data) )
  62
  63     return shares
  64
  65
  66 def getDebug():
  67     try:
  68         return config.getboolean('Server', 'debug')
  69     except NoOptionError, ValueError:
  70         return False
  71
  72 def getOptres():
  73     try:
  74         return config.getboolean('Server', 'optres')
  75     except NoOptionError, ValueError:
  76         return False
  77
  78 def get(section, key):
  79     return config.get(section, key)
  80
  81 def getFFMPEGTemplate(tsn):
  82     if tsn and config.has_section('_tivo_' + tsn):
  83         try:
  84             return config.get('_tivo_' + tsn, 'ffmpeg_prams', raw=True)
  85         except NoOptionError:
  86             pass
  87
  88     try:
  89         return config.get('Server', 'ffmpeg_prams', raw=True)
  90     except NoOptionError: #default
  91         return '-vcodec mpeg2video -r 29.97 -b %(video_br)s -maxrate %(max_video_br)s -bufsize %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_codec)s -ab %(audio_br)s -f vob -'
  92
  93 def getHDtivos():  # tsn's of High Definition Tivo's
  94     return ['648', '652']
  95
  96 def getValidWidths():
  97     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
  98
  99 def getValidHeights():
 100     return [1080, 720, 480] # Technically 240 is also supported
 101
 102 # Return the number in list that is nearest to x
 103 # if two values are equidistant, return the larger
 104 def nearest(x, list):
 105     return reduce(lambda a, b: closest(x,a,b), list)
 106
 107 def closest(x,a, b):
 108     if abs(x-a) < abs(x-b) or (abs(x-a) == abs(x-b)and a>b):
 109         return a
 110     else:
 111         return b
 112
 113 def nearestTivoHeight(height):
 114     return nearest(height, getValidHeights())
 115
 116 def nearestTivoWidth(width):
 117     return nearest(width, getValidWidths())
 118
 119 def getTivoHeight(tsn):
 120     if tsn and config.has_section('_tivo_' + tsn):
 121         try:
 122             height = config.getint('_tivo_' + tsn, 'height')
 123             return nearestTivoHeight(height)
 124         except NoOptionError:
 125             pass
 126
 127     try:
 128         height = config.getint('Server', 'height')
 129         return nearestTivoHeight(height)
 130     except NoOptionError: #defaults for S3/S2 TiVo
 131         if tsn and tsn[:3] in getHDtivos():
 132             return 720
 133         else:
 134             return 480
 135
 136 def getTivoWidth(tsn):
 137     if tsn and config.has_section('_tivo_' + tsn):
 138         try:
 139             width = config.getint('_tivo_' + tsn, 'width')
 140             return nearestTivoWidth(width)
 141         except NoOptionError:
 142             pass
 143
 144     try:
 145         width = config.getint('Server', 'width')
 146         return nearestTivoWidth(width)
 147     except NoOptionError: #defaults for S3/S2 TiVo
 148         if tsn and tsn[:3] in getHDtivos():
 149             return 1280
 150         else:
 151             return 544
 152
 153 def getAudioBR(tsn = None):
 154     #convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 155     #compare audio_br to max_audio_br and return lowest
 156     if tsn and config.has_section('_tivo_' + tsn):
 157         try:
 158             audiobr = int(max(int(strtod(config.get('_tivo_' + tsn, 'audio_br'))/1000), 64)/64)*64
 159             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 160         except NoOptionError:
 161             pass
 162
 163     try:
 164         audiobr = int(max(int(strtod(config.get('Server', 'audio_br'))/1000), 64)/64)*64
 165         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 166     except NoOptionError: #defaults for S3/S2 TiVo
 167         if tsn and tsn[:3] in getHDtivos():
 168             return '384k'
 169         else:
 170             return '192k'
 171
 172 def getAudioCodec(tsn = None):
 173     #check for HD tivo and return compatible audio parameters
 174     if tsn and tsn[:3] in getHDtivos():
 175         return '-acodec ac3 -ar 48000'
 176     else:
 177         return '-acodec mp2 -ac 2 -ar 44100'
 178
 179 def getVideoBR(tsn = None):
 180     if tsn and config.has_section('_tivo_' + tsn):
 181         try:
 182             return config.get('_tivo_' + tsn, 'video_br')
 183         except NoOptionError:
 184             pass
 185
 186     try:
 187         return config.get('Server', 'video_br')
 188     except NoOptionError: #defaults for S3/S2 TiVo
 189         if tsn and tsn[:3] in getHDtivos():
 190             return '8192k'
 191         else:
 192             return '4096K'
 193
 194 def getMaxVideoBR():
 195     try:
 196         return str(int(strtod(config.get('Server', 'max_video_br'))/1000)) + 'k'
 197     except NoOptionError: #default to 17Mi
 198         return '17408k'
 199
 200 def getBuffSize():
 201     try:
 202         return config.get('Server', 'bufsize')
 203     except NoOptionError: #default 1024k
 204         return '1024k'
 205
 206 def getMaxAudioBR(tsn = None):
 207     #convert to non-zero multiple of 64 for ffmpeg compatibility
 208     if tsn and config.has_section('_tivo_' + tsn):
 209         try:
 210             return int(int(strtod(config.get('_tivo_' + tsn, 'max_audio_br'))/1000)/64)*64
 211         except NoOptionError:
 212             pass
 213
 214     try:
 215         return int(int(strtod(config.get('Server', 'max_audio_br'))/1000)/64)*64
 216     except NoOptionError:
 217         if tsn and tsn[:3] in getHDtivos():
 218             return int(448) #default to 448, max supported by HD TiVo's
 219         else:
 220             return int(384) #default to 384, max supported by mp2 audio (S2 TiVo)
 221
 222
 223 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 224 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 225 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 226 def strtod(value):
 227     prefixes = {"y":-24,"z":-21,"a":-18,"f":-15,"p":-12,"n":-9,"u":-6,"m":-3,"c":-2,"d":-1,"h":2,"k":3,"K":3,"M":6,"G":9,"T":12,"P":15,"E":18,"Z":21,"Y":24}
 228     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 229     m = p.match(value)
 230     if m is None:
 231         raise SyntaxError('Invalid bit value syntax')
 232     (coef, prefix, power, byte) = m.groups()
 233     if prefix is None:
 234         value = float(coef)
 235     else:
 236         exponent = float(prefixes[prefix])
 237         if power == "i":
 238             # Use powers of 2
 239             value = float(coef) * pow(2.0, exponent/0.3)
 240         else:
 241             # Use powers of 10
 242             value = float(coef) * pow(10.0, exponent)
 243     if byte == "B": # B==Byte, b=bit
 244         value *= 8;
 245     return value