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 p = os.path.dirname(__file__)
  14
  15 config_files = [
  16     '/etc/pyTivo.conf',
  17     os.path.join(p, 'pyTivo.conf'),
  18 ]
  19 config_exists = False
  20 for config_file in config_files:
  21     if os.path.exists(config_file):
  22         config_exists = True
  23 if not config_exists:
  24     print ('ERROR: pyTivo.conf does not exist.\n' +
  25            'You must create this file before running pyTivo.')
  26     sys.exit(1)
  27 config.read(config_files)
  28
  29 def reset():
  30     global config
  31     del config
  32     config = ConfigParser.ConfigParser()
  33     config.read(config_files)
  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
  60 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  61     return tsn and tsn[:3] in ['649']
  62
  63 def get169Setting(tsn):
  64     if not tsn:
  65         return True
  66
  67     tsnsect = '_tivo_' + tsn
  68     if config.has_section(tsnsect):
  69         if config.has_option(tsnsect, 'aspect169'):
  70             try:
  71                 return config.getboolean(tsnsect, 'aspect169')
  72             except ValueError:
  73                 pass
  74
  75     if get169Blacklist(tsn) or get169Letterbox(tsn):
  76         return False
  77
  78     return True
  79
  80 def getShares(tsn=''):
  81     shares = [(section, dict(config.items(section)))
  82               for section in config.sections()
  83               if not (section.startswith(('_tivo_', 'logger_', 'handler_',
  84                                           'formatter_'))
  85                       or section in ('Server', 'loggers', 'handlers',
  86                                      'formatters')
  87               )
  88     ]
  89
  90     tsnsect = '_tivo_' + tsn
  91     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
  92         # clean up leading and trailing spaces & make sure ref is valid
  93         tsnshares = []
  94         for x in config.get(tsnsect, 'shares').split(','):
  95             y = x.strip()
  96             if config.has_section(y):
  97                 tsnshares.append((y, dict(config.items(y))))
  98         if tsnshares:
  99             shares = tsnshares
 100
 101     return shares
 102
 103 def getDebug():
 104     try:
 105         return config.getboolean('Server', 'debug')
 106     except NoOptionError, ValueError:
 107         return False
 108
 109 def getOptres(tsn=None):
 110     if tsn and config.has_section('_tivo_' + tsn):
 111         try:
 112             return config.getboolean('_tivo_' + tsn, 'optres')
 113         except NoOptionError, ValueError:
 114             pass
 115     try:
 116         return config.getboolean('Server', 'optres')
 117     except NoOptionError, ValueError:
 118         return False
 119
 120 def getPixelAR(ref):
 121     if config.has_option('Server', 'par'):
 122         try:
 123             return (True, config.getfloat('Server', 'par'))[ref]
 124         except NoOptionError, ValueError:
 125             pass
 126     return (False, 1.0)[ref]
 127
 128 def get(section, key):
 129     return config.get(section, key)
 130
 131 def getFFmpegTemplate(tsn):
 132     if tsn and config.has_section('_tivo_' + tsn):
 133         try:
 134             return config.get('_tivo_' + tsn, 'ffmpeg_tmpl', raw=True)
 135         except NoOptionError:
 136             pass
 137     try:
 138         return config.get('Server', 'ffmpeg_tmpl', raw=True)
 139     except NoOptionError: #default
 140         return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 141                 %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_br)s \
 142                 %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 143                 %(ffmpeg_pram)s %(format)s'
 144
 145 def getFFmpegPrams(tsn):
 146     if tsn and config.has_section('_tivo_' + tsn):
 147         try:
 148             return config.get('_tivo_' + tsn, 'ffmpeg_pram', raw=True)
 149         except NoOptionError:
 150             pass
 151     try:
 152         return config.get('Server', 'ffmpeg_pram', raw=True)
 153     except NoOptionError:
 154         return None
 155
 156 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 157     return tsn and tsn[:3] in ['648', '652', '658']
 158
 159 def getValidWidths():
 160     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 161
 162 def getValidHeights():
 163     return [1080, 720, 480] # Technically 240 is also supported
 164
 165 # Return the number in list that is nearest to x
 166 # if two values are equidistant, return the larger
 167 def nearest(x, list):
 168     return reduce(lambda a, b: closest(x, a, b), list)
 169
 170 def closest(x, a, b):
 171     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 172         return a
 173     else:
 174         return b
 175
 176 def nearestTivoHeight(height):
 177     return nearest(height, getValidHeights())
 178
 179 def nearestTivoWidth(width):
 180     return nearest(width, getValidWidths())
 181
 182 def getTivoHeight(tsn):
 183     if tsn and config.has_section('_tivo_' + tsn):
 184         try:
 185             height = config.getint('_tivo_' + tsn, 'height')
 186             return nearestTivoHeight(height)
 187         except NoOptionError:
 188             pass
 189     try:
 190         height = config.getint('Server', 'height')
 191         return nearestTivoHeight(height)
 192     except NoOptionError: #defaults for S3/S2 TiVo
 193         if isHDtivo(tsn):
 194             return 720
 195         else:
 196             return 480
 197
 198 def getTivoWidth(tsn):
 199     if tsn and config.has_section('_tivo_' + tsn):
 200         try:
 201             width = config.getint('_tivo_' + tsn, 'width')
 202             return nearestTivoWidth(width)
 203         except NoOptionError:
 204             pass
 205     try:
 206         width = config.getint('Server', 'width')
 207         return nearestTivoWidth(width)
 208     except NoOptionError: #defaults for S3/S2 TiVo
 209         if isHDtivo(tsn):
 210             return 1280
 211         else:
 212             return 544
 213
 214 def _trunc64(i):
 215     return max(int(strtod(i)) / 64000, 1) * 64
 216
 217 def getAudioBR(tsn=None):
 218     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 219     # compare audio_br to max_audio_br and return lowest
 220     if tsn and config.has_section('_tivo_' + tsn):
 221         try:
 222             audiobr = _trunc64(config.get('_tivo_' + tsn, 'audio_br'))
 223             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 224         except NoOptionError:
 225             pass
 226     try:
 227         audiobr = _trunc64(config.get('Server', 'audio_br'))
 228         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 229     except NoOptionError:
 230         return str(min(384, getMaxAudioBR(tsn))) + 'k'
 231
 232 def _k(i):
 233     return str(int(strtod(i)) / 1000) + 'k'
 234
 235 def getVideoBR(tsn=None):
 236     if tsn and config.has_section('_tivo_' + tsn):
 237         try:
 238             return _k(config.get('_tivo_' + tsn, 'video_br'))
 239         except NoOptionError:
 240             pass
 241     try:
 242         return _k(config.get('Server', 'video_br'))
 243     except NoOptionError: #defaults for S3/S2 TiVo
 244         if isHDtivo(tsn):
 245             return '8192k'
 246         else:
 247             return '4096K'
 248
 249 def getMaxVideoBR():
 250     try:
 251         return _k(config.get('Server', 'max_video_br'))
 252     except NoOptionError: #default to 30000k
 253         return '30000k'
 254
 255 def getVideoPCT():
 256     try:
 257         return config.getfloat('Server', 'video_pct')
 258     except NoOptionError:
 259         return 70
 260
 261 def getBuffSize(tsn=None):
 262     tsnsect = '_tivo_' + tsn
 263     if tsn and config.has_section(tsnsect):
 264         if config.has_option(tsnsect, 'bufsize'):
 265             try:
 266                 return _k(config.get(tsnsect, 'bufsize'))
 267             except NoOptionError:
 268                 pass
 269     if config.has_option('Server', 'bufsize'):
 270         try:
 271             return _k(config.get('Server', 'bufsize'))
 272         except NoOptionError:
 273             pass
 274     if isHDtivo(tsn):
 275         return '4096k'
 276     else:
 277         return '1024k'
 278
 279 def getMaxAudioBR(tsn=None):
 280     # convert to non-zero multiple of 64 for ffmpeg compatibility
 281     if tsn and config.has_section('_tivo_' + tsn):
 282         try:
 283             return _trunc64(config.get('_tivo_' + tsn, 'max_audio_br'))
 284         except NoOptionError:
 285             pass
 286     try:
 287         return _trunc64(config.get('Server', 'max_audio_br'))
 288     except NoOptionError:
 289         return int(448) #default to 448
 290
 291 def get_tsn(name, tsn=None):
 292     if tsn and config.has_section('_tivo_' + tsn):
 293         try:
 294             return config.get('_tivo_' + tsn, name)
 295         except NoOptionError:
 296             pass
 297     try:
 298         return config.get('Server', name)
 299     except NoOptionError:
 300         return None
 301
 302 def getAudioCodec(tsn=None):
 303     return get_tsn('audio_codec', tsn)
 304
 305 def getAudioCH(tsn=None):
 306     return get_tsn('audio_ch', tsn)
 307
 308 def getAudioFR(tsn=None):
 309     return get_tsn('audio_fr', tsn)
 310
 311 def getAudioLang(tsn=None):
 312     return get_tsn('audio_lang', tsn)
 313
 314 def getCopyTS(tsn=None):
 315     tsnsect = '_tivo_' + tsn
 316     if tsn and config.has_section(tsnsect):
 317         if config.has_option(tsnsect, 'copy_ts'):
 318             try:
 319                 return config.get(tsnsect, 'copy_ts')
 320             except NoOptionError, ValueError:
 321                 pass
 322     if config.has_option('Server', 'copy_ts'):
 323         try:
 324             return config.get('Server', 'copy_ts')
 325         except NoOptionError, ValueError:
 326             pass
 327     return 'none'
 328
 329 def getVideoFPS(tsn=None):
 330     return get_tsn('video_fps', tsn)
 331
 332 def getVideoCodec(tsn=None):
 333     return get_tsn('video_codec', tsn)
 334
 335 def getFormat(tsn=None):
 336     return get_tsn('format', tsn)
 337
 338 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 339 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 340 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 341 def strtod(value):
 342     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 343                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 344                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 345                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 346     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 347     m = p.match(value)
 348     if not m:
 349         raise SyntaxError('Invalid bit value syntax')
 350     (coef, prefix, power, byte) = m.groups()
 351     if prefix is None:
 352         value = float(coef)
 353     else:
 354         exponent = float(prefixes[prefix])
 355         if power == 'i':
 356             # Use powers of 2
 357             value = float(coef) * pow(2.0, exponent / 0.3)
 358         else:
 359             # Use powers of 10
 360             value = float(coef) * pow(10.0, exponent)
 361     if byte == 'B': # B == Byte, b == bit
 362         value *= 8;
 363     return value
 364
 365 def init_logging():
 366     if (config.has_section('loggers') and
 367         config.has_section('handlers') and
 368         config.has_section('formatters')):
 369
 370         logging.config.fileConfig(config_files)
 371
 372     elif getDebug():
 373         logging.basicConfig(level=logging.DEBUG)
 374     else:
 375         logging.basicConfig(level=logging.INFO)