config.py

   1 import ConfigParser, os, sys
   2 import re
   3 import random
   4 import string
   5 from ConfigParser import NoOptionError
   6
   7 guid = ''.join([random.choice(string.letters) for i in range(10)])
   8
   9 config = ConfigParser.ConfigParser()
  10 p = os.path.dirname(__file__)
  11
  12 config_files = [
  13     '/etc/pyTivo.conf',
  14     os.path.join(p, 'pyTivo.conf'),
  15 ]
  16 config_exists = False
  17 for config_file in config_files:
  18     if os.path.exists(config_file):
  19         config_exists = True
  20 if not config_exists:
  21     print 'ERROR:  pyTivo.conf does not exist.\n' + \
  22           'You must create this file before running pyTivo.'
  23     sys.exit(1)
  24 config.read(config_files)
  25
  26 def reset():
  27     global config
  28     del config
  29     config = ConfigParser.ConfigParser()
  30     config.read(config_files)
  31
  32 def getGUID():
  33     if config.has_option('Server', 'GUID'):
  34         return config.get('Server', 'GUID')
  35     else:
  36         return guid
  37
  38 def getTivoUsername():
  39     return config.get('Server', 'tivo_username')
  40
  41 def getTivoPassword():
  42     return config.get('Server', 'tivo_password')
  43
  44 def getBeaconAddresses():
  45     if config.has_option('Server', 'beacon'):
  46         beacon_ips = config.get('Server', 'beacon')
  47     else:
  48         beacon_ips = '255.255.255.255'
  49     return beacon_ips
  50
  51 def getPort():
  52     return config.get('Server', 'Port')
  53
  54 def get169Blacklist(tsn):  # tivo does not pad 16:9 video
  55     return tsn and not isHDtivo(tsn) and not get169Letterbox(tsn)
  56
  57 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  58     return tsn and tsn[:3] in ('649')
  59
  60 def get169Setting(tsn):
  61     if not tsn:
  62         return True
  63
  64     if config.has_section('_tivo_' + tsn):
  65         if config.has_option('_tivo_' + tsn, 'aspect169'):
  66             try:
  67                 return config.getboolean('_tivo_' + tsn, 'aspect169')
  68             except ValueError:
  69                 pass
  70
  71     if get169Blacklist(tsn) or get169Letterbox(tsn):
  72         return False
  73
  74     return True
  75
  76 def getShares(tsn=''):
  77     shares = [(section, dict(config.items(section)))
  78               for section in config.sections()
  79               if not (section.startswith(('_tivo_', 'logger_', 'handler_',
  80                                           'formatter_'))
  81                       or section in ('Server', 'loggers', 'handlers',
  82                                      'formatters')
  83               )
  84     ]
  85
  86     tsnsect = '_tivo_' + tsn
  87     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
  88         # clean up leading and trailing spaces & make sure ref is valid
  89         tsnshares = []
  90         for x in config.get(tsnsect, 'shares').split(','):
  91             y = x.strip()
  92             if config.has_section(y):
  93                 tsnshares.append((y, dict(config.items(y))))
  94         if tsnshares:
  95             shares = tsnshares
  96
  97     return shares
  98
  99 def getDebug():
 100     try:
 101         return config.getboolean('Server', 'debug')
 102     except NoOptionError, ValueError:
 103         return False
 104
 105 def getOptres(tsn = None):
 106     if tsn and config.has_section('_tivo_' + tsn):
 107         try:
 108             return config.getboolean('_tivo_' + tsn, 'optres')
 109         except NoOptionError, ValueError:
 110             pass
 111     try:
 112         return config.getboolean('Server', 'optres')
 113     except NoOptionError, ValueError:
 114         return False
 115
 116 def getPixelAR(ref):
 117     if config.has_option('Server', 'par'):
 118         try:
 119             return (True, config.getfloat('Server', 'par'))[ref]
 120         except NoOptionError, ValueError:
 121             pass
 122     return (False, 1.0)[ref]
 123
 124 def get(section, key):
 125     return config.get(section, key)
 126
 127 def getFFmpegTemplate(tsn):
 128     if tsn and config.has_section('_tivo_' + tsn):
 129         try:
 130             return config.get('_tivo_' + tsn, 'ffmpeg_tmpl', raw=True)
 131         except NoOptionError:
 132             pass
 133     try:
 134         return config.get('Server', 'ffmpeg_tmpl', raw=True)
 135     except NoOptionError: #default
 136         return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 137                 %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_br)s \
 138                 %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 139                 %(ffmpeg_pram)s %(format)s'
 140
 141 def getFFmpegPrams(tsn):
 142     if tsn and config.has_section('_tivo_' + tsn):
 143         try:
 144             return config.get('_tivo_' + tsn, 'ffmpeg_pram', raw=True)
 145         except NoOptionError:
 146             pass
 147     try:
 148         return config.get('Server', 'ffmpeg_pram', raw=True)
 149     except NoOptionError:
 150         return None
 151
 152 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 153     return tsn and tsn[:3] in ['648', '652', '658']
 154
 155 def getValidWidths():
 156     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 157
 158 def getValidHeights():
 159     return [1080, 720, 480] # Technically 240 is also supported
 160
 161 # Return the number in list that is nearest to x
 162 # if two values are equidistant, return the larger
 163 def nearest(x, list):
 164     return reduce(lambda a, b: closest(x, a, b), list)
 165
 166 def closest(x, a, b):
 167     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 168         return a
 169     else:
 170         return b
 171
 172 def nearestTivoHeight(height):
 173     return nearest(height, getValidHeights())
 174
 175 def nearestTivoWidth(width):
 176     return nearest(width, getValidWidths())
 177
 178 def getTivoHeight(tsn):
 179     if tsn and config.has_section('_tivo_' + tsn):
 180         try:
 181             height = config.getint('_tivo_' + tsn, 'height')
 182             return nearestTivoHeight(height)
 183         except NoOptionError:
 184             pass
 185     try:
 186         height = config.getint('Server', 'height')
 187         return nearestTivoHeight(height)
 188     except NoOptionError: #defaults for S3/S2 TiVo
 189         if isHDtivo(tsn):
 190             return 720
 191         else:
 192             return 480
 193
 194 def getTivoWidth(tsn):
 195     if tsn and config.has_section('_tivo_' + tsn):
 196         try:
 197             width = config.getint('_tivo_' + tsn, 'width')
 198             return nearestTivoWidth(width)
 199         except NoOptionError:
 200             pass
 201     try:
 202         width = config.getint('Server', 'width')
 203         return nearestTivoWidth(width)
 204     except NoOptionError: #defaults for S3/S2 TiVo
 205         if isHDtivo(tsn):
 206             return 1280
 207         else:
 208             return 544
 209
 210 def _trunc64(i):
 211     return max(int(strtod(i)) / 64000, 1) * 64
 212
 213 def getAudioBR(tsn = None):
 214     #convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 215     #compare audio_br to max_audio_br and return lowest
 216     if tsn and config.has_section('_tivo_' + tsn):
 217         try:
 218             audiobr = _trunc64(config.get('_tivo_' + tsn, 'audio_br'))
 219             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 220         except NoOptionError:
 221             pass
 222     try:
 223         audiobr = _trunc64(config.get('Server', 'audio_br'))
 224         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 225     except NoOptionError:
 226         return str(min(384, getMaxAudioBR(tsn))) + 'k'
 227
 228 def _k(i):
 229     return str(int(strtod(i)) / 1000) + 'k'
 230
 231 def getVideoBR(tsn = None):
 232     if tsn and config.has_section('_tivo_' + tsn):
 233         try:
 234             return _k(config.get('_tivo_' + tsn, 'video_br'))
 235         except NoOptionError:
 236             pass
 237     try:
 238         return _k(config.get('Server', 'video_br'))
 239     except NoOptionError: #defaults for S3/S2 TiVo
 240         if isHDtivo(tsn):
 241             return '8192k'
 242         else:
 243             return '4096K'
 244
 245 def getMaxVideoBR():
 246     try:
 247         return _k(config.get('Server', 'max_video_br'))
 248     except NoOptionError: #default to 30000k
 249         return '30000k'
 250
 251 def getVideoPCT():
 252     try:
 253         return config.getfloat('Server', 'video_pct')
 254     except NoOptionError:
 255         return 70
 256
 257 def getBuffSize(tsn = None):
 258     if tsn and config.has_section('_tivo_' + tsn):
 259         if config.has_option('_tivo_' + tsn, 'bufsize'):
 260             try:
 261                 return _k(config.get('_tivo_' + tsn, 'bufsize'))
 262             except NoOptionError:
 263                 pass
 264     if config.has_option('Server', 'bufsize'):
 265         try:
 266             return _k(config.get('Server', 'bufsize'))
 267         except NoOptionError:
 268             pass
 269     if isHDtivo(tsn):
 270         return '4096k'
 271     else:
 272         return '1024k'
 273
 274 def getMaxAudioBR(tsn = None):
 275     #convert to non-zero multiple of 64 for ffmpeg compatibility
 276     if tsn and config.has_section('_tivo_' + tsn):
 277         try:
 278             return _trunc64(config.get('_tivo_' + tsn, 'max_audio_br'))
 279         except NoOptionError:
 280             pass
 281     try:
 282         return _trunc64(config.get('Server', 'max_audio_br'))
 283     except NoOptionError:
 284         return int(448) #default to 448
 285
 286 def get_tsn(name, tsn=None):
 287     if tsn and config.has_section('_tivo_' + tsn):
 288         try:
 289             return config.get('_tivo_' + tsn, name)
 290         except NoOptionError:
 291             pass
 292     try:
 293         return config.get('Server', name)
 294     except NoOptionError:
 295         return None
 296
 297 def getAudioCodec(tsn=None):
 298     return get_tsn('audio_codec', tsn)
 299
 300 def getAudioCH(tsn=None):
 301     return get_tsn('audio_ch', tsn)
 302
 303 def getAudioFR(tsn=None):
 304     return get_tsn('audio_fr', tsn)
 305
 306 def getAudioLang(tsn=None):
 307     return get_tsn('audio_lang', tsn)
 308
 309 def getCopyTS(tsn = None):
 310     if tsn and config.has_section('_tivo_' + tsn):
 311         if config.has_option('_tivo_' + tsn, 'copy_ts'):
 312             try:
 313                 return config.get('_tivo_' + tsn, 'copy_ts')
 314             except NoOptionError, ValueError:
 315                 pass
 316     if config.has_option('Server', 'copy_ts'):
 317         try:
 318             return config.get('Server', 'copy_ts')
 319         except NoOptionError, ValueError:
 320             pass
 321     return 'none'
 322
 323 def getVideoFPS(tsn=None):
 324     return get_tsn('video_fps', tsn)
 325
 326 def getVideoCodec(tsn=None):
 327     return get_tsn('video_codec', tsn)
 328
 329 def getFormat(tsn = None):
 330     return get_tsn('format', tsn)
 331
 332 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 333 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 334 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 335 def strtod(value):
 336     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 337                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 338                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 339                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 340     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 341     m = p.match(value)
 342     if m is None:
 343         raise SyntaxError('Invalid bit value syntax')
 344     (coef, prefix, power, byte) = m.groups()
 345     if prefix is None:
 346         value = float(coef)
 347     else:
 348         exponent = float(prefixes[prefix])
 349         if power == 'i':
 350             # Use powers of 2
 351             value = float(coef) * pow(2.0, exponent / 0.3)
 352         else:
 353             # Use powers of 10
 354             value = float(coef) * pow(10.0, exponent)
 355     if byte == 'B': # B == Byte, b == bit
 356         value *= 8;
 357     return value