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