config.py

   1 import ConfigParser, os, sys
   2 import logging
   3 import re
   4 import random
   5 import string
   6 from ConfigParser import NoOptionError
   7
   8 guid = ''.join([random.choice(string.letters) for i in range(10)])
   9
  10 config = ConfigParser.ConfigParser()
  11 p = os.path.dirname(__file__)
  12
  13 config_files = [
  14     '/etc/pyTivo.conf',
  15     os.path.join(p, 'pyTivo.conf'),
  16 ]
  17 config_exists = False
  18 for config_file in config_files:
  19     if os.path.exists(config_file):
  20         config_exists = True
  21 if not config_exists:
  22     print 'ERROR:  pyTivo.conf does not exist.\n' + \
  23           'You must create this file before running pyTivo.'
  24     sys.exit(1)
  25 config.read(config_files)
  26
  27 def reset():
  28     global config
  29     del config
  30     config = ConfigParser.ConfigParser()
  31     config.read(config_files)
  32
  33 def getGUID():
  34     if config.has_option('Server', 'GUID'):
  35         return config.get('Server', 'GUID')
  36     else:
  37         return guid
  38
  39 def getTivoUsername():
  40     return config.get('Server', 'tivo_username')
  41
  42 def getTivoPassword():
  43     return config.get('Server', 'tivo_password')
  44
  45 def getBeaconAddresses():
  46     if config.has_option('Server', 'beacon'):
  47         beacon_ips = config.get('Server', 'beacon')
  48     else:
  49         beacon_ips = '255.255.255.255'
  50     return beacon_ips
  51
  52 def getPort():
  53     return config.get('Server', 'Port')
  54
  55 def get169Blacklist(tsn):  # tivo does not pad 16:9 video
  56     return tsn and not isHDtivo(tsn) and not get169Letterbox(tsn)
  57
  58 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  59     return tsn and tsn[:3] in ('649')
  60
  61 def get169Setting(tsn):
  62     if not tsn:
  63         return True
  64
  65     if config.has_section('_tivo_' + tsn):
  66         if config.has_option('_tivo_' + tsn, 'aspect169'):
  67             try:
  68                 return config.getboolean('_tivo_' + tsn, 'aspect169')
  69             except ValueError:
  70                 pass
  71
  72     if get169Blacklist(tsn) or get169Letterbox(tsn):
  73         return False
  74
  75     return True
  76
  77 def getShares(tsn=''):
  78     shares = [(section, dict(config.items(section)))
  79               for section in config.sections()
  80               if not (section.startswith(('_tivo_', 'logger_', 'handler_',
  81                                           'formatter_'))
  82                       or section in ('Server', 'loggers', 'handlers',
  83                                      'formatters')
  84               )
  85     ]
  86
  87     tsnsect = '_tivo_' + tsn
  88     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
  89         # clean up leading and trailing spaces & make sure ref is valid
  90         tsnshares = []
  91         for x in config.get(tsnsect, 'shares').split(','):
  92             y = x.strip()
  93             if config.has_section(y):
  94                 tsnshares.append((y, dict(config.items(y))))
  95         if tsnshares:
  96             shares = tsnshares
  97
  98     return shares
  99
 100 def getDebug():
 101     try:
 102         return config.getboolean('Server', 'debug')
 103     except NoOptionError, ValueError:
 104         return False
 105
 106 def getOptres(tsn = None):
 107     if tsn and config.has_section('_tivo_' + tsn):
 108         try:
 109             return config.getboolean('_tivo_' + tsn, 'optres')
 110         except NoOptionError, ValueError:
 111             pass
 112     try:
 113         return config.getboolean('Server', 'optres')
 114     except NoOptionError, ValueError:
 115         return False
 116
 117 def getPixelAR(ref):
 118     if config.has_option('Server', 'par'):
 119         try:
 120             return (True, config.getfloat('Server', 'par'))[ref]
 121         except NoOptionError, ValueError:
 122             pass
 123     return (False, 1.0)[ref]
 124
 125 def get(section, key):
 126     return config.get(section, key)
 127
 128 def getFFmpegTemplate(tsn):
 129     if tsn and config.has_section('_tivo_' + tsn):
 130         try:
 131             return config.get('_tivo_' + tsn, 'ffmpeg_tmpl', raw=True)
 132         except NoOptionError:
 133             pass
 134     try:
 135         return config.get('Server', 'ffmpeg_tmpl', raw=True)
 136     except NoOptionError: #default
 137         return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 138                 %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_br)s \
 139                 %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 140                 %(ffmpeg_pram)s %(format)s'
 141
 142 def getFFmpegPrams(tsn):
 143     if tsn and config.has_section('_tivo_' + tsn):
 144         try:
 145             return config.get('_tivo_' + tsn, 'ffmpeg_pram', raw=True)
 146         except NoOptionError:
 147             pass
 148     try:
 149         return config.get('Server', 'ffmpeg_pram', raw=True)
 150     except NoOptionError:
 151         return None
 152
 153 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 154     return tsn and tsn[:3] in ['648', '652', '658']
 155
 156 def getValidWidths():
 157     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 158
 159 def getValidHeights():
 160     return [1080, 720, 480] # Technically 240 is also supported
 161
 162 # Return the number in list that is nearest to x
 163 # if two values are equidistant, return the larger
 164 def nearest(x, list):
 165     return reduce(lambda a, b: closest(x, a, b), list)
 166
 167 def closest(x, a, b):
 168     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 169         return a
 170     else:
 171         return b
 172
 173 def nearestTivoHeight(height):
 174     return nearest(height, getValidHeights())
 175
 176 def nearestTivoWidth(width):
 177     return nearest(width, getValidWidths())
 178
 179 def getTivoHeight(tsn):
 180     if tsn and config.has_section('_tivo_' + tsn):
 181         try:
 182             height = config.getint('_tivo_' + tsn, 'height')
 183             return nearestTivoHeight(height)
 184         except NoOptionError:
 185             pass
 186     try:
 187         height = config.getint('Server', 'height')
 188         return nearestTivoHeight(height)
 189     except NoOptionError: #defaults for S3/S2 TiVo
 190         if isHDtivo(tsn):
 191             return 720
 192         else:
 193             return 480
 194
 195 def getTivoWidth(tsn):
 196     if tsn and config.has_section('_tivo_' + tsn):
 197         try:
 198             width = config.getint('_tivo_' + tsn, 'width')
 199             return nearestTivoWidth(width)
 200         except NoOptionError:
 201             pass
 202     try:
 203         width = config.getint('Server', 'width')
 204         return nearestTivoWidth(width)
 205     except NoOptionError: #defaults for S3/S2 TiVo
 206         if isHDtivo(tsn):
 207             return 1280
 208         else:
 209             return 544
 210
 211 def _trunc64(i):
 212     return max(int(strtod(i)) / 64000, 1) * 64
 213
 214 def getAudioBR(tsn = None):
 215     #convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 216     #compare audio_br to max_audio_br and return lowest
 217     if tsn and config.has_section('_tivo_' + tsn):
 218         try:
 219             audiobr = _trunc64(config.get('_tivo_' + tsn, 'audio_br'))
 220             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 221         except NoOptionError:
 222             pass
 223     try:
 224         audiobr = _trunc64(config.get('Server', 'audio_br'))
 225         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 226     except NoOptionError:
 227         return str(min(384, getMaxAudioBR(tsn))) + 'k'
 228
 229 def _k(i):
 230     return str(int(strtod(i)) / 1000) + 'k'
 231
 232 def getVideoBR(tsn = None):
 233     if tsn and config.has_section('_tivo_' + tsn):
 234         try:
 235             return _k(config.get('_tivo_' + tsn, 'video_br'))
 236         except NoOptionError:
 237             pass
 238     try:
 239         return _k(config.get('Server', 'video_br'))
 240     except NoOptionError: #defaults for S3/S2 TiVo
 241         if isHDtivo(tsn):
 242             return '8192k'
 243         else:
 244             return '4096K'
 245
 246 def getMaxVideoBR():
 247     try:
 248         return _k(config.get('Server', 'max_video_br'))
 249     except NoOptionError: #default to 30000k
 250         return '30000k'
 251
 252 def getVideoPCT():
 253     try:
 254         return config.getfloat('Server', 'video_pct')
 255     except NoOptionError:
 256         return 70
 257
 258 def getBuffSize(tsn = None):
 259     if tsn and config.has_section('_tivo_' + tsn):
 260         if config.has_option('_tivo_' + tsn, 'bufsize'):
 261             try:
 262                 return _k(config.get('_tivo_' + tsn, 'bufsize'))
 263             except NoOptionError:
 264                 pass
 265     if config.has_option('Server', 'bufsize'):
 266         try:
 267             return _k(config.get('Server', 'bufsize'))
 268         except NoOptionError:
 269             pass
 270     if isHDtivo(tsn):
 271         return '4096k'
 272     else:
 273         return '1024k'
 274
 275 def getMaxAudioBR(tsn = None):
 276     #convert to non-zero multiple of 64 for ffmpeg compatibility
 277     if tsn and config.has_section('_tivo_' + tsn):
 278         try:
 279             return _trunc64(config.get('_tivo_' + tsn, 'max_audio_br'))
 280         except NoOptionError:
 281             pass
 282     try:
 283         return _trunc64(config.get('Server', 'max_audio_br'))
 284     except NoOptionError:
 285         return int(448) #default to 448
 286
 287 def get_tsn(name, tsn=None):
 288     if tsn and config.has_section('_tivo_' + tsn):
 289         try:
 290             return config.get('_tivo_' + tsn, name)
 291         except NoOptionError:
 292             pass
 293     try:
 294         return config.get('Server', name)
 295     except NoOptionError:
 296         return None
 297
 298 def getAudioCodec(tsn=None):
 299     return get_tsn('audio_codec', tsn)
 300
 301 def getAudioCH(tsn=None):
 302     return get_tsn('audio_ch', tsn)
 303
 304 def getAudioFR(tsn=None):
 305     return get_tsn('audio_fr', tsn)
 306
 307 def getAudioLang(tsn=None):
 308     return get_tsn('audio_lang', tsn)
 309
 310 def getCopyTS(tsn = None):
 311     if tsn and config.has_section('_tivo_' + tsn):
 312         if config.has_option('_tivo_' + tsn, 'copy_ts'):
 313             try:
 314                 return config.get('_tivo_' + tsn, 'copy_ts')
 315             except NoOptionError, ValueError:
 316                 pass
 317     if config.has_option('Server', 'copy_ts'):
 318         try:
 319             return config.get('Server', 'copy_ts')
 320         except NoOptionError, ValueError:
 321             pass
 322     return 'none'
 323
 324 def getVideoFPS(tsn=None):
 325     return get_tsn('video_fps', tsn)
 326
 327 def getVideoCodec(tsn=None):
 328     return get_tsn('video_codec', tsn)
 329
 330 def getFormat(tsn = None):
 331     return get_tsn('format', tsn)
 332
 333 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 334 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 335 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 336 def strtod(value):
 337     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 338                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 339                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 340                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 341     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 342     m = p.match(value)
 343     if m is None:
 344         raise SyntaxError('Invalid bit value syntax')
 345     (coef, prefix, power, byte) = m.groups()
 346     if prefix is None:
 347         value = float(coef)
 348     else:
 349         exponent = float(prefixes[prefix])
 350         if power == 'i':
 351             # Use powers of 2
 352             value = float(coef) * pow(2.0, exponent / 0.3)
 353         else:
 354             # Use powers of 10
 355             value = float(coef) * pow(10.0, exponent)
 356     if byte == 'B': # B == Byte, b == bit
 357         value *= 8;
 358     return value
 359
 360 def init_logging():
 361     if (config.has_section('loggers') and
 362         config.has_section('handlers') and
 363         config.has_section('formatters')):
 364
 365         logging.config.fileConfig(config_files)
 366
 367     elif getDebug():
 368         logging.basicConfig(level=logging.DEBUG)
 369     else:
 370         logging.basicConfig(level=logging.INFO)