config.py

   1 import ConfigParser
   2 import logging
   3 import logging.config
   4 import os
   5 import re
   6 import random
   7 import string
   8 import sys
   9 from ConfigParser import NoOptionError
  10
  11 guid = ''.join([random.choice(string.letters) for i in range(10)])
  12
  13 config = ConfigParser.ConfigParser()
  14
  15 p = os.path.dirname(__file__)
  16 config_files = ['/etc/pyTivo.conf', os.path.join(p, 'pyTivo.conf')]
  17
  18 configs_found = config.read(config_files)
  19 if not configs_found:
  20     print ('ERROR: pyTivo.conf does not exist.\n' +
  21            'You must create this file before running pyTivo.')
  22     sys.exit(1)
  23
  24 def reset():
  25     global config
  26     newconfig = ConfigParser.ConfigParser()
  27     newconfig.read(config_files)
  28     config = newconfig
  29
  30 def write():
  31     f = open(configs_found[-1], 'w')
  32     config.write(f)
  33     f.close()
  34
  35 def getGUID():
  36     if config.has_option('Server', 'GUID'):
  37         return config.get('Server', 'GUID')
  38     else:
  39         return guid
  40
  41 def getTivoUsername():
  42     return config.get('Server', 'tivo_username')
  43
  44 def getTivoPassword():
  45     return config.get('Server', 'tivo_password')
  46
  47 def getBeaconAddresses():
  48     if config.has_option('Server', 'beacon'):
  49         beacon_ips = config.get('Server', 'beacon')
  50     else:
  51         beacon_ips = '255.255.255.255'
  52     return beacon_ips
  53
  54 def getPort():
  55     return config.get('Server', 'Port')
  56
  57 def get169Blacklist(tsn):  # tivo does not pad 16:9 video
  58     return tsn and not isHDtivo(tsn) and not get169Letterbox(tsn)
  59     # verified Blacklist Tivo's are ('130', '240', '540')
  60     # It is assumed all remaining non-HD and non-Letterbox tivos are Blacklist
  61
  62 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  63     return tsn and tsn[:3] in ['649']
  64
  65 def get169Setting(tsn):
  66     if not tsn:
  67         return True
  68
  69     tsnsect = '_tivo_' + tsn
  70     if config.has_section(tsnsect):
  71         if config.has_option(tsnsect, 'aspect169'):
  72             try:
  73                 return config.getboolean(tsnsect, 'aspect169')
  74             except ValueError:
  75                 pass
  76
  77     if get169Blacklist(tsn) or get169Letterbox(tsn):
  78         return False
  79
  80     return True
  81
  82 def getShares(tsn=''):
  83     shares = [(section, dict(config.items(section)))
  84               for section in config.sections()
  85               if not (section.startswith('_tivo_')
  86                       or section.startswith('logger_')
  87                       or section.startswith('handler_')
  88                       or section.startswith('formatter_')
  89                       or section in ('Server', 'loggers', 'handlers',
  90                                      'formatters')
  91               )
  92     ]
  93
  94     tsnsect = '_tivo_' + tsn
  95     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
  96         # clean up leading and trailing spaces & make sure ref is valid
  97         tsnshares = []
  98         for x in config.get(tsnsect, 'shares').split(','):
  99             y = x.strip()
 100             if config.has_section(y):
 101                 tsnshares.append((y, dict(config.items(y))))
 102         if tsnshares:
 103             shares = tsnshares
 104
 105     return shares
 106
 107 def getDebug():
 108     try:
 109         return config.getboolean('Server', 'debug')
 110     except NoOptionError, ValueError:
 111         return False
 112
 113 def getOptres(tsn=None):
 114     if tsn and config.has_section('_tivo_' + tsn):
 115         try:
 116             return config.getboolean('_tivo_' + tsn, 'optres')
 117         except NoOptionError, ValueError:
 118             pass
 119     section_name = get_section(tsn)
 120     if config.has_section(section_name):
 121         try:
 122             return config.getboolean(section_name, 'optres')
 123         except NoOptionError, ValueError:
 124             pass
 125     try:
 126         return config.getboolean('Server', 'optres')
 127     except NoOptionError, ValueError:
 128         return False
 129
 130 def getPixelAR(ref):
 131     if config.has_option('Server', 'par'):
 132         try:
 133             return (True, config.getfloat('Server', 'par'))[ref]
 134         except NoOptionError, ValueError:
 135             pass
 136     return (False, 1.0)[ref]
 137
 138 def get(section, key):
 139     return config.get(section, key)
 140
 141 def getFFmpegWait():
 142     if config.has_option('Server', 'ffmpeg_wait'):
 143         return max(int(float(config.get('Server', 'ffmpeg_wait'))), 1)
 144     else:
 145         return 10
 146
 147 def getFFmpegTemplate(tsn):
 148     if tsn and config.has_section('_tivo_' + tsn):
 149         try:
 150             return config.get('_tivo_' + tsn, 'ffmpeg_tmpl', raw=True)
 151         except NoOptionError:
 152             pass
 153     section_name = get_section(tsn)
 154     if config.has_section(section_name):
 155         try:
 156             return config.get(section_name, 'ffmpeg_tmpl', raw=True)
 157         except NoOptionError:
 158             pass
 159     try:
 160         return config.get('Server', 'ffmpeg_tmpl', raw=True)
 161     except NoOptionError: #default
 162         return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 163                 %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_br)s \
 164                 %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 165                 %(ffmpeg_pram)s %(format)s'
 166
 167 def getFFmpegPrams(tsn):
 168     if tsn and config.has_section('_tivo_' + tsn):
 169         try:
 170             return config.get('_tivo_' + tsn, 'ffmpeg_pram', raw=True)
 171         except NoOptionError:
 172             pass
 173     section_name = get_section(tsn)
 174     if config.has_section(section_name):
 175         try:
 176             return config.get(section_name, 'ffmpeg_pram', raw=True)
 177         except NoOptionError:
 178             pass
 179     try:
 180         return config.get('Server', 'ffmpeg_pram', raw=True)
 181     except NoOptionError:
 182         return None
 183
 184 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 185     return bool(tsn and tsn[:3] in ['648', '652', '658'])
 186
 187 def getValidWidths():
 188     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 189
 190 def getValidHeights():
 191     return [1080, 720, 480] # Technically 240 is also supported
 192
 193 # Return the number in list that is nearest to x
 194 # if two values are equidistant, return the larger
 195 def nearest(x, list):
 196     return reduce(lambda a, b: closest(x, a, b), list)
 197
 198 def closest(x, a, b):
 199     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 200         return a
 201     else:
 202         return b
 203
 204 def nearestTivoHeight(height):
 205     return nearest(height, getValidHeights())
 206
 207 def nearestTivoWidth(width):
 208     return nearest(width, getValidWidths())
 209
 210 def getTivoHeight(tsn):
 211     if tsn and config.has_section('_tivo_' + tsn):
 212         try:
 213             height = config.getint('_tivo_' + tsn, 'height')
 214             return nearestTivoHeight(height)
 215         except NoOptionError:
 216             pass
 217     section_name = get_section(tsn)
 218     if config.has_section(section_name):
 219         try:
 220             height = config.getint(section_name, 'height')
 221             return nearestTivoHeight(height)
 222         except NoOptionError:
 223             pass
 224     try:
 225         width = config.getint('Server', 'height')
 226         return nearestTivoHeight(height)
 227     except NoOptionError:
 228         pass
 229     return [480, 720][isHDtivo(tsn)]
 230
 231 def getTivoWidth(tsn):
 232     if tsn and config.has_section('_tivo_' + tsn):
 233         try:
 234             width = config.getint('_tivo_' + tsn, 'width')
 235             return nearestTivoWidth(width)
 236         except NoOptionError:
 237             pass
 238     section_name = get_section(tsn)
 239     if config.has_section(section_name):
 240         try:
 241             width = config.getint(section_name, 'width')
 242             return nearestTivoWidth(width)
 243         except NoOptionError:
 244             pass
 245     try:
 246         width = config.getint('Server', 'width')
 247         return nearestTivoWidth(width)
 248     except NoOptionError:
 249         pass
 250     return [544, 1280][isHDtivo(tsn)]
 251
 252 def _trunc64(i):
 253     return max(int(strtod(i)) / 64000, 1) * 64
 254
 255 def getAudioBR(tsn=None):
 256     rate = get_tsn('audio_br', tsn)
 257     if not rate:
 258         rate = '448k'
 259     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 260     # compare audio_br to max_audio_br and return lowest
 261     return str(min(_trunc64(rate), getMaxAudioBR(tsn))) + 'k'
 262
 263 def _k(i):
 264     return str(int(strtod(i)) / 1000) + 'k'
 265
 266 def getVideoBR(tsn=None):
 267     rate = get_tsn('video_br', tsn)
 268     if rate:
 269         return _k(rate)
 270     return ['4096K', '16384K'][isHDtivo(tsn)]
 271
 272 def getMaxVideoBR(tsn=None):
 273     rate = get_tsn('max_video_br', tsn)
 274     if rate:
 275         return _k(rate)
 276     return '30000k'
 277
 278 def getVideoPCT(tsn=None):
 279     if tsn and config.has_section('_tivo_' + tsn):
 280         try:
 281             return config.getfloat('_tivo_' + tsn, 'video_pct')
 282         except NoOptionError:
 283             pass
 284     section_name = get_section(tsn)
 285     if config.has_section(section_name):
 286         try:
 287             return config.getfloat(section_name, 'video_pct')
 288         except NoOptionError:
 289             pass
 290     try:
 291         return config.getfloat('Server', 'video_pct')
 292     except NoOptionError:
 293         pass
 294     return 85
 295
 296 def getBuffSize(tsn=None):
 297     size = get_tsn('bufsize', tsn)
 298     if size:
 299         return _k(size)
 300     return ['1024k', '4096k'][isHDtivo(tsn)]
 301
 302 def getMaxAudioBR(tsn=None):
 303     rate = get_tsn('max_audio_br', tsn)
 304     # convert to non-zero multiple of 64 for ffmpeg compatibility
 305     if rate:
 306         return _trunc64(rate)
 307     return 448
 308
 309 def get_section(tsn):
 310     return ['_tivo_SD', '_tivo_HD'][isHDtivo(tsn)]
 311
 312 def get_tsn(name, tsn=None):
 313     if tsn and config.has_section('_tivo_' + tsn):
 314         try:
 315             return config.get('_tivo_' + tsn, name)
 316         except NoOptionError:
 317             pass
 318     section_name = get_section(tsn)
 319     if config.has_section(section_name):
 320         try:
 321             return config.get(section_name, name)
 322         except NoOptionError:
 323             pass
 324     try:
 325         return config.get('Server', name)
 326     except NoOptionError:
 327         pass
 328     return None
 329
 330 def getAudioCodec(tsn=None):
 331     return get_tsn('audio_codec', tsn)
 332
 333 def getAudioCH(tsn=None):
 334     return get_tsn('audio_ch', tsn)
 335
 336 def getAudioFR(tsn=None):
 337     return get_tsn('audio_fr', tsn)
 338
 339 def getAudioLang(tsn=None):
 340     return get_tsn('audio_lang', tsn)
 341
 342 def getCopyTS(tsn=None):
 343     return get_tsn('copy_ts', tsn)
 344
 345 def getVideoFPS(tsn=None):
 346     return get_tsn('video_fps', tsn)
 347
 348 def getVideoCodec(tsn=None):
 349     return get_tsn('video_codec', tsn)
 350
 351 def getFormat(tsn=None):
 352     return get_tsn('format', tsn)
 353
 354 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 355 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 356 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 357 def strtod(value):
 358     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 359                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 360                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 361                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 362     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 363     m = p.match(value)
 364     if not m:
 365         raise SyntaxError('Invalid bit value syntax')
 366     (coef, prefix, power, byte) = m.groups()
 367     if prefix is None:
 368         value = float(coef)
 369     else:
 370         exponent = float(prefixes[prefix])
 371         if power == 'i':
 372             # Use powers of 2
 373             value = float(coef) * pow(2.0, exponent / 0.3)
 374         else:
 375             # Use powers of 10
 376             value = float(coef) * pow(10.0, exponent)
 377     if byte == 'B': # B == Byte, b == bit
 378         value *= 8;
 379     return value
 380
 381 def init_logging():
 382     if (config.has_section('loggers') and
 383         config.has_section('handlers') and
 384         config.has_section('formatters')):
 385
 386         logging.config.fileConfig(config_files)
 387
 388     elif getDebug():
 389         logging.basicConfig(level=logging.DEBUG)
 390     else:
 391         logging.basicConfig(level=logging.INFO)