config.py

   1 import ConfigParser
   2 import getopt
   3 import logging
   4 import logging.config
   5 import os
   6 import re
   7 import socket
   8 import sys
   9 import uuid
  10 from ConfigParser import NoOptionError
  11
  12 class Bdict(dict):
  13     def getboolean(self, x):
  14         return self.get(x, 'False').lower() in ('1', 'yes', 'true', 'on')
  15
  16 def init(argv):
  17     global tivos
  18     global guid
  19     global config_files
  20     global tivos_found
  21
  22     tivos = {}
  23     guid = uuid.uuid4()
  24     tivos_found = False
  25
  26     p = os.path.dirname(__file__)
  27     config_files = ['/etc/pyTivo.conf', os.path.join(p, 'pyTivo.conf')]
  28
  29     try:
  30         opts, _ = getopt.getopt(argv, 'c:e:', ['config=', 'extraconf='])
  31     except getopt.GetoptError, msg:
  32         print msg
  33
  34     for opt, value in opts:
  35         if opt in ('-c', '--config'):
  36             config_files = [value]
  37         elif opt in ('-e', '--extraconf'):
  38             config_files.append(value)
  39
  40     reset()
  41
  42 def reset():
  43     global bin_paths
  44     global config
  45     global configs_found
  46     global tivos_found
  47
  48     bin_paths = {}
  49
  50     config = ConfigParser.ConfigParser()
  51     configs_found = config.read(config_files)
  52     if not configs_found:
  53         print ('WARNING: pyTivo.conf does not exist.\n' +
  54                'Assuming default values.')
  55         configs_found = config_files[-1:]
  56
  57     for section in config.sections():
  58         if section.startswith('_tivo_'):
  59             tsn = section[6:]
  60             if tsn.upper() not in ['SD', 'HD']:
  61                 tivos_found = True
  62                 tivos[tsn] = Bdict(config.items(section))
  63
  64     for section in ['Server', '_tivo_SD', '_tivo_HD']:
  65         if not config.has_section(section):
  66             config.add_section(section)
  67
  68 def write():
  69     f = open(configs_found[-1], 'w')
  70     config.write(f)
  71     f.close()
  72
  73 def tivos_by_ip(tivoIP):
  74     for key, value in tivos.items():
  75         if value['address'] == tivoIP:
  76             return key
  77
  78 def get_server(name, default=None):
  79     if config.has_option('Server', name):
  80         return config.get('Server', name)
  81     else:
  82         return default
  83
  84 def getGUID():
  85     return str(guid)
  86
  87 def get_ip(tsn=None):
  88     try:
  89         assert(tsn)
  90         dest_ip = tivos[tsn]['address']
  91     except:
  92         dest_ip = '4.2.2.1'
  93     s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
  94     s.connect((dest_ip, 123))
  95     return s.getsockname()[0]
  96
  97 def get_zc():
  98     opt = get_server('zeroconf', 'auto').lower()
  99
 100     if opt == 'auto':
 101         for section in config.sections():
 102             if section.startswith('_tivo_'):
 103                 if config.has_option(section, 'shares'):
 104                     logger = logging.getLogger('pyTivo.config')
 105                     logger.info('Shares security in use -- zeroconf disabled')
 106                     return False
 107     elif opt in ['false', 'no', 'off']:
 108         return False
 109
 110     return True
 111
 112 def getBeaconAddresses():
 113     return get_server('beacon', '255.255.255.255')
 114
 115 def getPort():
 116     return get_server('port', '9032')
 117
 118 def get169Blacklist(tsn):  # tivo does not pad 16:9 video
 119     return tsn and not isHDtivo(tsn) and not get169Letterbox(tsn)
 120     # verified Blacklist Tivo's are ('130', '240', '540')
 121     # It is assumed all remaining non-HD and non-Letterbox tivos are Blacklist
 122
 123 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
 124     return tsn and tsn[:3] in ['649']
 125
 126 def get169Setting(tsn):
 127     if not tsn:
 128         return True
 129
 130     tsnsect = '_tivo_' + tsn
 131     if config.has_section(tsnsect):
 132         if config.has_option(tsnsect, 'aspect169'):
 133             try:
 134                 return config.getboolean(tsnsect, 'aspect169')
 135             except ValueError:
 136                 pass
 137
 138     if get169Blacklist(tsn) or get169Letterbox(tsn):
 139         return False
 140
 141     return True
 142
 143 def getAllowedClients():
 144     return get_server('allowedips', '').split()
 145
 146 def getIsExternal(tsn):
 147     tsnsect = '_tivo_' + tsn
 148     if tsnsect in config.sections():
 149         if config.has_option(tsnsect, 'external'):
 150             try:
 151                 return config.getboolean(tsnsect, 'external')
 152             except ValueError:
 153                 pass
 154
 155     return False
 156
 157 def isTsnInConfig(tsn):
 158     return ('_tivo_' + tsn) in config.sections()
 159
 160 def getShares(tsn=''):
 161     shares = [(section, Bdict(config.items(section)))
 162               for section in config.sections()
 163               if not (section.startswith(('_tivo_', 'logger_', 'handler_',
 164                                           'formatter_'))
 165                       or section in ('Server', 'loggers', 'handlers',
 166                                      'formatters')
 167               )
 168     ]
 169
 170     tsnsect = '_tivo_' + tsn
 171     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
 172         # clean up leading and trailing spaces & make sure ref is valid
 173         tsnshares = []
 174         for x in config.get(tsnsect, 'shares').split(','):
 175             y = x.strip()
 176             if config.has_section(y):
 177                 tsnshares.append((y, Bdict(config.items(y))))
 178         shares = tsnshares
 179
 180     shares.sort()
 181
 182     if get_server('nosettings', 'false').lower() in ['false', 'no', 'off']:
 183         shares.append(('Settings', {'type': 'settings'}))
 184     if get_server('tivo_mak') and get_server('togo_path'):
 185         shares.append(('ToGo', {'type': 'togo'}))
 186
 187     return shares
 188
 189 def getDebug():
 190     try:
 191         return config.getboolean('Server', 'debug')
 192     except:
 193         return False
 194
 195 def getOptres(tsn=None):
 196     try:
 197         return config.getboolean('_tivo_' + tsn, 'optres')
 198     except:
 199         try:
 200             return config.getboolean(get_section(tsn), 'optres')
 201         except:
 202             try:
 203                 return config.getboolean('Server', 'optres')
 204             except:
 205                 return False
 206
 207 def get_bin(fname):
 208     global bin_paths
 209
 210     logger = logging.getLogger('pyTivo.config')
 211
 212     if fname in bin_paths:
 213         return bin_paths[fname]
 214
 215     if config.has_option('Server', fname):
 216         fpath = config.get('Server', fname)
 217         if os.path.exists(fpath) and os.path.isfile(fpath):
 218             bin_paths[fname] = fpath
 219             return fpath
 220         else:
 221             logger.error('Bad %s path: %s' % (fname, fpath))
 222
 223     if sys.platform == 'win32':
 224         fext = '.exe'
 225     else:
 226         fext = ''
 227
 228     for path in ([os.path.join(os.path.dirname(__file__), 'bin')] +
 229                  os.getenv('PATH').split(os.pathsep)):
 230         fpath = os.path.join(path, fname + fext)
 231         if os.path.exists(fpath) and os.path.isfile(fpath):
 232             bin_paths[fname] = fpath
 233             return fpath
 234
 235     logger.warn('%s not found' % fname)
 236     return None
 237
 238 def getFFmpegWait():
 239     if config.has_option('Server', 'ffmpeg_wait'):
 240         return max(int(float(config.get('Server', 'ffmpeg_wait'))), 1)
 241     else:
 242         return 0
 243
 244 def getFFmpegPrams(tsn):
 245     return get_tsn('ffmpeg_pram', tsn, True)
 246
 247 def isHDtivo(tsn):  # TSNs of High Definition TiVos
 248     return bool(tsn and tsn[0] >= '6' and tsn[:3] != '649')
 249
 250 def get_ts_flag():
 251     return get_server('ts', 'auto').lower()
 252
 253 def is_ts_capable(tsn):  # tsn's of Tivos that support transport streams
 254     return bool(tsn and (tsn[0] >= '7' or tsn.startswith('663')))
 255
 256 def getValidWidths():
 257     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 258
 259 def getValidHeights():
 260     return [1080, 720, 480] # Technically 240 is also supported
 261
 262 # Return the number in list that is nearest to x
 263 # if two values are equidistant, return the larger
 264 def nearest(x, list):
 265     return reduce(lambda a, b: closest(x, a, b), list)
 266
 267 def closest(x, a, b):
 268     da = abs(x - a)
 269     db = abs(x - b)
 270     if da < db or (da == db and a > b):
 271         return a
 272     else:
 273         return b
 274
 275 def nearestTivoHeight(height):
 276     return nearest(height, getValidHeights())
 277
 278 def nearestTivoWidth(width):
 279     return nearest(width, getValidWidths())
 280
 281 def getTivoHeight(tsn):
 282     return [480, 1080][isHDtivo(tsn)]
 283
 284 def getTivoWidth(tsn):
 285     return [544, 1920][isHDtivo(tsn)]
 286
 287 def _trunc64(i):
 288     return max(int(strtod(i)) / 64000, 1) * 64
 289
 290 def getAudioBR(tsn=None):
 291     rate = get_tsn('audio_br', tsn)
 292     if not rate:
 293         rate = '448k'
 294     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 295     # compare audio_br to max_audio_br and return lowest
 296     return str(min(_trunc64(rate), getMaxAudioBR(tsn))) + 'k'
 297
 298 def _k(i):
 299     return str(int(strtod(i)) / 1000) + 'k'
 300
 301 def getVideoBR(tsn=None):
 302     rate = get_tsn('video_br', tsn)
 303     if rate:
 304         return _k(rate)
 305     return ['4096K', '16384K'][isHDtivo(tsn)]
 306
 307 def getMaxVideoBR(tsn=None):
 308     rate = get_tsn('max_video_br', tsn)
 309     if rate:
 310         return _k(rate)
 311     return '30000k'
 312
 313 def getBuffSize(tsn=None):
 314     size = get_tsn('bufsize', tsn)
 315     if size:
 316         return _k(size)
 317     return ['1024k', '4096k'][isHDtivo(tsn)]
 318
 319 def getMaxAudioBR(tsn=None):
 320     rate = get_tsn('max_audio_br', tsn)
 321     # convert to non-zero multiple of 64 for ffmpeg compatibility
 322     if rate:
 323         return _trunc64(rate)
 324     return 448
 325
 326 def get_section(tsn):
 327     return ['_tivo_SD', '_tivo_HD'][isHDtivo(tsn)]
 328
 329 def get_tsn(name, tsn=None, raw=False):
 330     try:
 331         return config.get('_tivo_' + tsn, name, raw)
 332     except:
 333         try:
 334             return config.get(get_section(tsn), name, raw)
 335         except:
 336             try:
 337                 return config.get('Server', name, raw)
 338             except:
 339                 return None
 340
 341 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 342 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 343 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 344 def strtod(value):
 345     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 346                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 347                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 348                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 349     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 350     m = p.match(value)
 351     if not m:
 352         raise SyntaxError('Invalid bit value syntax')
 353     (coef, prefix, power, byte) = m.groups()
 354     if prefix is None:
 355         value = float(coef)
 356     else:
 357         exponent = float(prefixes[prefix])
 358         if power == 'i':
 359             # Use powers of 2
 360             value = float(coef) * pow(2.0, exponent / 0.3)
 361         else:
 362             # Use powers of 10
 363             value = float(coef) * pow(10.0, exponent)
 364     if byte == 'B': # B == Byte, b == bit
 365         value *= 8;
 366     return value
 367
 368 def init_logging():
 369     if (config.has_section('loggers') and
 370         config.has_section('handlers') and
 371         config.has_section('formatters')):
 372
 373         logging.config.fileConfig(config_files)
 374
 375     elif getDebug():
 376         logging.basicConfig(level=logging.DEBUG)
 377     else:
 378         logging.basicConfig(level=logging.INFO)