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     # verified Blacklist Tivo's are ('130', '240', '540')
  59     # It is assumed all remaining non-HD and non-Letterbox tivos are Blacklist
  60
  61 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  62     return tsn and tsn[:3] in ['649']
  63
  64 def get169Setting(tsn):
  65     if not tsn:
  66         return True
  67
  68     tsnsect = '_tivo_' + tsn
  69     if config.has_section(tsnsect):
  70         if config.has_option(tsnsect, 'aspect169'):
  71             try:
  72                 return config.getboolean(tsnsect, 'aspect169')
  73             except ValueError:
  74                 pass
  75
  76     if get169Blacklist(tsn) or get169Letterbox(tsn):
  77         return False
  78
  79     return True
  80
  81 def getShares(tsn=''):
  82     shares = [(section, dict(config.items(section)))
  83               for section in config.sections()
  84               if not (section.startswith('_tivo_')
  85                       or section.startswith('logger_')
  86                       or section.startswith('handler_')
  87                       or section.startswith('formatter_')
  88                       or section in ('Server', 'loggers', 'handlers',
  89                                      'formatters')
  90               )
  91     ]
  92
  93     tsnsect = '_tivo_' + tsn
  94     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
  95         # clean up leading and trailing spaces & make sure ref is valid
  96         tsnshares = []
  97         for x in config.get(tsnsect, 'shares').split(','):
  98             y = x.strip()
  99             if config.has_section(y):
 100                 tsnshares.append((y, dict(config.items(y))))
 101         if tsnshares:
 102             shares = tsnshares
 103
 104     return shares
 105
 106 def getDebug():
 107     try:
 108         return config.getboolean('Server', 'debug')
 109     except NoOptionError, ValueError:
 110         return False
 111
 112 def getOptres(tsn=None):
 113     if tsn and config.has_section('_tivo_' + tsn):
 114         try:
 115             return config.getboolean('_tivo_' + tsn, 'optres')
 116         except NoOptionError, ValueError:
 117             pass
 118     try:
 119         return config.getboolean('Server', 'optres')
 120     except NoOptionError, ValueError:
 121         return False
 122
 123 def getPixelAR(ref):
 124     if config.has_option('Server', 'par'):
 125         try:
 126             return (True, config.getfloat('Server', 'par'))[ref]
 127         except NoOptionError, ValueError:
 128             pass
 129     return (False, 1.0)[ref]
 130
 131 def get(section, key):
 132     return config.get(section, key)
 133
 134 def getFFmpegWait():
 135     if config.has_option('Server', 'ffmpeg_wait'):
 136         return max(int(float(config.get('Server', 'ffmpeg_wait'))), 1)
 137     else:
 138         return 10
 139
 140 def getFFmpegTemplate(tsn):
 141     if tsn and config.has_section('_tivo_' + tsn):
 142         try:
 143             return config.get('_tivo_' + tsn, 'ffmpeg_tmpl', raw=True)
 144         except NoOptionError:
 145             pass
 146     try:
 147         return config.get('Server', 'ffmpeg_tmpl', raw=True)
 148     except NoOptionError: #default
 149         return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 150                 %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_br)s \
 151                 %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 152                 %(ffmpeg_pram)s %(format)s'
 153
 154 def getFFmpegPrams(tsn):
 155     if tsn and config.has_section('_tivo_' + tsn):
 156         try:
 157             return config.get('_tivo_' + tsn, 'ffmpeg_pram', raw=True)
 158         except NoOptionError:
 159             pass
 160     try:
 161         return config.get('Server', 'ffmpeg_pram', raw=True)
 162     except NoOptionError:
 163         return None
 164
 165 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 166     return tsn and tsn[:3] in ['648', '652', '658']
 167
 168 def getValidWidths():
 169     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 170
 171 def getValidHeights():
 172     return [1080, 720, 480] # Technically 240 is also supported
 173
 174 # Return the number in list that is nearest to x
 175 # if two values are equidistant, return the larger
 176 def nearest(x, list):
 177     return reduce(lambda a, b: closest(x, a, b), list)
 178
 179 def closest(x, a, b):
 180     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 181         return a
 182     else:
 183         return b
 184
 185 def nearestTivoHeight(height):
 186     return nearest(height, getValidHeights())
 187
 188 def nearestTivoWidth(width):
 189     return nearest(width, getValidWidths())
 190
 191 def getTivoHeight(tsn):
 192     if tsn and config.has_section('_tivo_' + tsn):
 193         try:
 194             height = config.getint('_tivo_' + tsn, 'height')
 195             return nearestTivoHeight(height)
 196         except NoOptionError:
 197             pass
 198     try:
 199         height = config.getint('Server', 'height')
 200         return nearestTivoHeight(height)
 201     except NoOptionError: #defaults for S3/S2 TiVo
 202         if isHDtivo(tsn):
 203             return 720
 204         else:
 205             return 480
 206
 207 def getTivoWidth(tsn):
 208     if tsn and config.has_section('_tivo_' + tsn):
 209         try:
 210             width = config.getint('_tivo_' + tsn, 'width')
 211             return nearestTivoWidth(width)
 212         except NoOptionError:
 213             pass
 214     try:
 215         width = config.getint('Server', 'width')
 216         return nearestTivoWidth(width)
 217     except NoOptionError: #defaults for S3/S2 TiVo
 218         if isHDtivo(tsn):
 219             return 1280
 220         else:
 221             return 544
 222
 223 def _trunc64(i):
 224     return max(int(strtod(i)) / 64000, 1) * 64
 225
 226 def getAudioBR(tsn=None):
 227     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 228     # compare audio_br to max_audio_br and return lowest
 229     if tsn and config.has_section('_tivo_' + tsn):
 230         try:
 231             audiobr = _trunc64(config.get('_tivo_' + tsn, 'audio_br'))
 232             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 233         except NoOptionError:
 234             pass
 235     try:
 236         audiobr = _trunc64(config.get('Server', 'audio_br'))
 237         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 238     except NoOptionError:
 239         return str(min(384, getMaxAudioBR(tsn))) + 'k'
 240
 241 def _k(i):
 242     return str(int(strtod(i)) / 1000) + 'k'
 243
 244 def getVideoBR(tsn=None):
 245     if tsn and config.has_section('_tivo_' + tsn):
 246         try:
 247             return _k(config.get('_tivo_' + tsn, 'video_br'))
 248         except NoOptionError:
 249             pass
 250     try:
 251         return _k(config.get('Server', 'video_br'))
 252     except NoOptionError: #defaults for S3/S2 TiVo
 253         if isHDtivo(tsn):
 254             return '8192k'
 255         else:
 256             return '4096K'
 257
 258 def getMaxVideoBR():
 259     try:
 260         return _k(config.get('Server', 'max_video_br'))
 261     except NoOptionError: #default to 30000k
 262         return '30000k'
 263
 264 def getVideoPCT():
 265     try:
 266         return config.getfloat('Server', 'video_pct')
 267     except NoOptionError:
 268         return 70
 269
 270 def getBuffSize(tsn=None):
 271     tsnsect = '_tivo_' + tsn
 272     if tsn and config.has_section(tsnsect):
 273         if config.has_option(tsnsect, 'bufsize'):
 274             try:
 275                 return _k(config.get(tsnsect, 'bufsize'))
 276             except NoOptionError:
 277                 pass
 278     if config.has_option('Server', 'bufsize'):
 279         try:
 280             return _k(config.get('Server', 'bufsize'))
 281         except NoOptionError:
 282             pass
 283     if isHDtivo(tsn):
 284         return '4096k'
 285     else:
 286         return '1024k'
 287
 288 def getMaxAudioBR(tsn=None):
 289     # convert to non-zero multiple of 64 for ffmpeg compatibility
 290     if tsn and config.has_section('_tivo_' + tsn):
 291         try:
 292             return _trunc64(config.get('_tivo_' + tsn, 'max_audio_br'))
 293         except NoOptionError:
 294             pass
 295     try:
 296         return _trunc64(config.get('Server', 'max_audio_br'))
 297     except NoOptionError:
 298         return int(448) # default to 448
 299
 300 def get_tsn(name, tsn=None):
 301     if tsn and config.has_section('_tivo_' + tsn):
 302         try:
 303             return config.get('_tivo_' + tsn, name)
 304         except NoOptionError:
 305             pass
 306     try:
 307         return config.get('Server', name)
 308     except NoOptionError:
 309         return None
 310
 311 def getAudioCodec(tsn=None):
 312     return get_tsn('audio_codec', tsn)
 313
 314 def getAudioCH(tsn=None):
 315     return get_tsn('audio_ch', tsn)
 316
 317 def getAudioFR(tsn=None):
 318     return get_tsn('audio_fr', tsn)
 319
 320 def getAudioLang(tsn=None):
 321     return get_tsn('audio_lang', tsn)
 322
 323 def getCopyTS(tsn=None):
 324     return get_tsn('copy_ts', tsn)
 325
 326 def getVideoFPS(tsn=None):
 327     return get_tsn('video_fps', tsn)
 328
 329 def getVideoCodec(tsn=None):
 330     return get_tsn('video_codec', tsn)
 331
 332 def getFormat(tsn=None):
 333     return get_tsn('format', tsn)
 334
 335 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 336 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 337 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 338 def strtod(value):
 339     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 340                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 341                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 342                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 343     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 344     m = p.match(value)
 345     if not m:
 346         raise SyntaxError('Invalid bit value syntax')
 347     (coef, prefix, power, byte) = m.groups()
 348     if prefix is None:
 349         value = float(coef)
 350     else:
 351         exponent = float(prefixes[prefix])
 352         if power == 'i':
 353             # Use powers of 2
 354             value = float(coef) * pow(2.0, exponent / 0.3)
 355         else:
 356             # Use powers of 10
 357             value = float(coef) * pow(10.0, exponent)
 358     if byte == 'B': # B == Byte, b == bit
 359         value *= 8;
 360     return value
 361
 362 def init_logging():
 363     if (config.has_section('loggers') and
 364         config.has_section('handlers') and
 365         config.has_section('formatters')):
 366
 367         logging.config.fileConfig(config_files)
 368
 369     elif getDebug():
 370         logging.basicConfig(level=logging.DEBUG)
 371     else:
 372         logging.basicConfig(level=logging.INFO)