config.py

   1 import ConfigParser
   2 import logging
   3 import os
   4 import re
   5 import random
   6 import string
   7 import sys
   8 from ConfigParser import NoOptionError
   9
  10 guid = ''.join([random.choice(string.letters) for i in range(10)])
  11
  12 config = ConfigParser.ConfigParser()
  13
  14 p = os.path.dirname(__file__)
  15 config_files = ['/etc/pyTivo.conf', os.path.join(p, 'pyTivo.conf')]
  16
  17 configs_found = config.read(config_files)
  18 if not configs_found:
  19     print ('ERROR: pyTivo.conf does not exist.\n' +
  20            'You must create this file before running pyTivo.')
  21     sys.exit(1)
  22
  23 def reset():
  24     global config
  25     newconfig = ConfigParser.ConfigParser()
  26     newconfig.read(config_files)
  27     config = newconfig
  28
  29 def write():
  30     f = open(configs_found[-1], 'w')
  31     config.write(f)
  32     f.close()
  33
  34 def getGUID():
  35     if config.has_option('Server', 'GUID'):
  36         return config.get('Server', 'GUID')
  37     else:
  38         return guid
  39
  40 def getTivoUsername():
  41     return config.get('Server', 'tivo_username')
  42
  43 def getTivoPassword():
  44     return config.get('Server', 'tivo_password')
  45
  46 def getBeaconAddresses():
  47     if config.has_option('Server', 'beacon'):
  48         beacon_ips = config.get('Server', 'beacon')
  49     else:
  50         beacon_ips = '255.255.255.255'
  51     return beacon_ips
  52
  53 def getPort():
  54     return config.get('Server', 'Port')
  55
  56 def get169Blacklist(tsn):  # tivo does not pad 16:9 video
  57     return tsn and not isHDtivo(tsn) and not get169Letterbox(tsn)
  58
  59 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  60     return tsn and tsn[:3] in ['649']
  61
  62 def get169Setting(tsn):
  63     if not tsn:
  64         return True
  65
  66     tsnsect = '_tivo_' + tsn
  67     if config.has_section(tsnsect):
  68         if config.has_option(tsnsect, 'aspect169'):
  69             try:
  70                 return config.getboolean(tsnsect, 'aspect169')
  71             except ValueError:
  72                 pass
  73
  74     if get169Blacklist(tsn) or get169Letterbox(tsn):
  75         return False
  76
  77     return True
  78
  79 def getShares(tsn=''):
  80     shares = [(section, dict(config.items(section)))
  81               for section in config.sections()
  82               if not (section.startswith(('_tivo_', 'logger_', 'handler_',
  83                                           'formatter_'))
  84                       or section in ('Server', 'loggers', 'handlers',
  85                                      'formatters')
  86               )
  87     ]
  88
  89     tsnsect = '_tivo_' + tsn
  90     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
  91         # clean up leading and trailing spaces & make sure ref is valid
  92         tsnshares = []
  93         for x in config.get(tsnsect, 'shares').split(','):
  94             y = x.strip()
  95             if config.has_section(y):
  96                 tsnshares.append((y, dict(config.items(y))))
  97         if tsnshares:
  98             shares = tsnshares
  99
 100     return shares
 101
 102 def getDebug():
 103     try:
 104         return config.getboolean('Server', 'debug')
 105     except NoOptionError, ValueError:
 106         return False
 107
 108 def getOptres(tsn=None):
 109     if tsn and config.has_section('_tivo_' + tsn):
 110         try:
 111             return config.getboolean('_tivo_' + tsn, 'optres')
 112         except NoOptionError, ValueError:
 113             pass
 114     try:
 115         return config.getboolean('Server', 'optres')
 116     except NoOptionError, ValueError:
 117         return False
 118
 119 def getPixelAR(ref):
 120     if config.has_option('Server', 'par'):
 121         try:
 122             return (True, config.getfloat('Server', 'par'))[ref]
 123         except NoOptionError, ValueError:
 124             pass
 125     return (False, 1.0)[ref]
 126
 127 def get(section, key):
 128     return config.get(section, key)
 129
 130 def getFFmpegTemplate(tsn):
 131     if tsn and config.has_section('_tivo_' + tsn):
 132         try:
 133             return config.get('_tivo_' + tsn, 'ffmpeg_tmpl', raw=True)
 134         except NoOptionError:
 135             pass
 136     try:
 137         return config.get('Server', 'ffmpeg_tmpl', raw=True)
 138     except NoOptionError: #default
 139         return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 140                 %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_br)s \
 141                 %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 142                 %(ffmpeg_pram)s %(format)s'
 143
 144 def getFFmpegPrams(tsn):
 145     if tsn and config.has_section('_tivo_' + tsn):
 146         try:
 147             return config.get('_tivo_' + tsn, 'ffmpeg_pram', raw=True)
 148         except NoOptionError:
 149             pass
 150     try:
 151         return config.get('Server', 'ffmpeg_pram', raw=True)
 152     except NoOptionError:
 153         return None
 154
 155 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 156     return tsn and tsn[:3] in ['648', '652', '658']
 157
 158 def getValidWidths():
 159     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 160
 161 def getValidHeights():
 162     return [1080, 720, 480] # Technically 240 is also supported
 163
 164 # Return the number in list that is nearest to x
 165 # if two values are equidistant, return the larger
 166 def nearest(x, list):
 167     return reduce(lambda a, b: closest(x, a, b), list)
 168
 169 def closest(x, a, b):
 170     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 171         return a
 172     else:
 173         return b
 174
 175 def nearestTivoHeight(height):
 176     return nearest(height, getValidHeights())
 177
 178 def nearestTivoWidth(width):
 179     return nearest(width, getValidWidths())
 180
 181 def getTivoHeight(tsn):
 182     if tsn and config.has_section('_tivo_' + tsn):
 183         try:
 184             height = config.getint('_tivo_' + tsn, 'height')
 185             return nearestTivoHeight(height)
 186         except NoOptionError:
 187             pass
 188     try:
 189         height = config.getint('Server', 'height')
 190         return nearestTivoHeight(height)
 191     except NoOptionError: #defaults for S3/S2 TiVo
 192         if isHDtivo(tsn):
 193             return 720
 194         else:
 195             return 480
 196
 197 def getTivoWidth(tsn):
 198     if tsn and config.has_section('_tivo_' + tsn):
 199         try:
 200             width = config.getint('_tivo_' + tsn, 'width')
 201             return nearestTivoWidth(width)
 202         except NoOptionError:
 203             pass
 204     try:
 205         width = config.getint('Server', 'width')
 206         return nearestTivoWidth(width)
 207     except NoOptionError: #defaults for S3/S2 TiVo
 208         if isHDtivo(tsn):
 209             return 1280
 210         else:
 211             return 544
 212
 213 def _trunc64(i):
 214     return max(int(strtod(i)) / 64000, 1) * 64
 215
 216 def getAudioBR(tsn=None):
 217     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 218     # compare audio_br to max_audio_br and return lowest
 219     if tsn and config.has_section('_tivo_' + tsn):
 220         try:
 221             audiobr = _trunc64(config.get('_tivo_' + tsn, 'audio_br'))
 222             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 223         except NoOptionError:
 224             pass
 225     try:
 226         audiobr = _trunc64(config.get('Server', 'audio_br'))
 227         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 228     except NoOptionError:
 229         return str(min(384, getMaxAudioBR(tsn))) + 'k'
 230
 231 def _k(i):
 232     return str(int(strtod(i)) / 1000) + 'k'
 233
 234 def getVideoBR(tsn=None):
 235     if tsn and config.has_section('_tivo_' + tsn):
 236         try:
 237             return _k(config.get('_tivo_' + tsn, 'video_br'))
 238         except NoOptionError:
 239             pass
 240     try:
 241         return _k(config.get('Server', 'video_br'))
 242     except NoOptionError: #defaults for S3/S2 TiVo
 243         if isHDtivo(tsn):
 244             return '8192k'
 245         else:
 246             return '4096K'
 247
 248 def getMaxVideoBR():
 249     try:
 250         return _k(config.get('Server', 'max_video_br'))
 251     except NoOptionError: #default to 30000k
 252         return '30000k'
 253
 254 def getVideoPCT():
 255     try:
 256         return config.getfloat('Server', 'video_pct')
 257     except NoOptionError:
 258         return 70
 259
 260 def getBuffSize(tsn=None):
 261     tsnsect = '_tivo_' + tsn
 262     if tsn and config.has_section(tsnsect):
 263         if config.has_option(tsnsect, 'bufsize'):
 264             try:
 265                 return _k(config.get(tsnsect, 'bufsize'))
 266             except NoOptionError:
 267                 pass
 268     if config.has_option('Server', 'bufsize'):
 269         try:
 270             return _k(config.get('Server', 'bufsize'))
 271         except NoOptionError:
 272             pass
 273     if isHDtivo(tsn):
 274         return '4096k'
 275     else:
 276         return '1024k'
 277
 278 def getMaxAudioBR(tsn=None):
 279     # convert to non-zero multiple of 64 for ffmpeg compatibility
 280     if tsn and config.has_section('_tivo_' + tsn):
 281         try:
 282             return _trunc64(config.get('_tivo_' + tsn, 'max_audio_br'))
 283         except NoOptionError:
 284             pass
 285     try:
 286         return _trunc64(config.get('Server', 'max_audio_br'))
 287     except NoOptionError:
 288         return int(448) # default to 448
 289
 290 def get_tsn(name, tsn=None):
 291     if tsn and config.has_section('_tivo_' + tsn):
 292         try:
 293             return config.get('_tivo_' + tsn, name)
 294         except NoOptionError:
 295             pass
 296     try:
 297         return config.get('Server', name)
 298     except NoOptionError:
 299         return None
 300
 301 def getAudioCodec(tsn=None):
 302     return get_tsn('audio_codec', tsn)
 303
 304 def getAudioCH(tsn=None):
 305     return get_tsn('audio_ch', tsn)
 306
 307 def getAudioFR(tsn=None):
 308     return get_tsn('audio_fr', tsn)
 309
 310 def getAudioLang(tsn=None):
 311     return get_tsn('audio_lang', tsn)
 312
 313 def getCopyTS(tsn=None):
 314     return get_tsn('copy_ts', tsn)
 315
 316 def getVideoFPS(tsn=None):
 317     return get_tsn('video_fps', tsn)
 318
 319 def getVideoCodec(tsn=None):
 320     return get_tsn('video_codec', tsn)
 321
 322 def getFormat(tsn=None):
 323     return get_tsn('format', tsn)
 324
 325 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 326 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 327 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 328 def strtod(value):
 329     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 330                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 331                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 332                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 333     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 334     m = p.match(value)
 335     if not m:
 336         raise SyntaxError('Invalid bit value syntax')
 337     (coef, prefix, power, byte) = m.groups()
 338     if prefix is None:
 339         value = float(coef)
 340     else:
 341         exponent = float(prefixes[prefix])
 342         if power == 'i':
 343             # Use powers of 2
 344             value = float(coef) * pow(2.0, exponent / 0.3)
 345         else:
 346             # Use powers of 10
 347             value = float(coef) * pow(10.0, exponent)
 348     if byte == 'B': # B == Byte, b == bit
 349         value *= 8;
 350     return value
 351
 352 def init_logging():
 353     if (config.has_section('loggers') and
 354         config.has_section('handlers') and
 355         config.has_section('formatters')):
 356
 357         logging.config.fileConfig(config_files)
 358
 359     elif getDebug():
 360         logging.basicConfig(level=logging.DEBUG)
 361     else:
 362         logging.basicConfig(level=logging.INFO)