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     section_name = get_section(tsn)
 120     if config.has_section(section_name):
 121         try:
 122             return config.getboolean(section_name, 'optres')
 123         except NoOptionError, ValueError:
 124             pass
 125     try:
 126         return config.getboolean('Server', 'optres')
 127     except NoOptionError, ValueError:
 128         return False
 129
 130 def getPixelAR(ref):
 131     if config.has_option('Server', 'par'):
 132         try:
 133             return (True, config.getfloat('Server', 'par'))[ref]
 134         except NoOptionError, ValueError:
 135             pass
 136     return (False, 1.0)[ref]
 137
 138 def get(section, key):
 139     return config.get(section, key)
 140
 141 def getFFmpegWait():
 142     if config.has_option('Server', 'ffmpeg_wait'):
 143         return max(int(float(config.get('Server', 'ffmpeg_wait'))), 1)
 144     else:
 145         return 10
 146
 147 def getFFmpegTemplate(tsn):
 148     tmpl = get_tsn('ffmpeg_tmpl', tsn, True)
 149     if tmpl:
 150         return tmpl
 151     return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 152             %(buff_size)s %(aspect_ratio)s %(audio_br)s \
 153             %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 154             %(ffmpeg_pram)s %(format)s'
 155
 156 def getFFmpegPrams(tsn):
 157     return get_tsn('ffmpeg_pram', tsn, True)
 158
 159 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 160     return bool(tsn and tsn[:3] in ['648', '652', '658', '663'])
 161
 162 def getValidWidths():
 163     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 164
 165 def getValidHeights():
 166     return [1080, 720, 480] # Technically 240 is also supported
 167
 168 # Return the number in list that is nearest to x
 169 # if two values are equidistant, return the larger
 170 def nearest(x, list):
 171     return reduce(lambda a, b: closest(x, a, b), list)
 172
 173 def closest(x, a, b):
 174     da = abs(x - a)
 175     db = abs(x - b)
 176     if da < db or (da == db and a > b):
 177         return a
 178     else:
 179         return b
 180
 181 def nearestTivoHeight(height):
 182     return nearest(height, getValidHeights())
 183
 184 def nearestTivoWidth(width):
 185     return nearest(width, getValidWidths())
 186
 187 def getTivoHeight(tsn):
 188     height = get_tsn('height', tsn)
 189     if height:
 190         return nearestTivoHeight(int(height))
 191     return [480, 720][isHDtivo(tsn)]
 192
 193 def getTivoWidth(tsn):
 194     width = get_tsn('width', tsn)
 195     if width:
 196         return nearestTivoWidth(int(width))
 197     return [544, 1280][isHDtivo(tsn)]
 198
 199 def _trunc64(i):
 200     return max(int(strtod(i)) / 64000, 1) * 64
 201
 202 def getAudioBR(tsn=None):
 203     rate = get_tsn('audio_br', tsn)
 204     if not rate:
 205         rate = '448k'
 206     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 207     # compare audio_br to max_audio_br and return lowest
 208     return str(min(_trunc64(rate), getMaxAudioBR(tsn))) + 'k'
 209
 210 def _k(i):
 211     return str(int(strtod(i)) / 1000) + 'k'
 212
 213 def getVideoBR(tsn=None):
 214     rate = get_tsn('video_br', tsn)
 215     if rate:
 216         return _k(rate)
 217     return ['4096K', '16384K'][isHDtivo(tsn)]
 218
 219 def getMaxVideoBR(tsn=None):
 220     rate = get_tsn('max_video_br', tsn)
 221     if rate:
 222         return _k(rate)
 223     return '30000k'
 224
 225 def getVideoPCT(tsn=None):
 226     pct = get_tsn('video_pct', tsn)
 227     if pct:
 228         return float(pct)
 229     return 85
 230
 231 def getBuffSize(tsn=None):
 232     size = get_tsn('bufsize', tsn)
 233     if size:
 234         return _k(size)
 235     return ['1024k', '4096k'][isHDtivo(tsn)]
 236
 237 def getMaxAudioBR(tsn=None):
 238     rate = get_tsn('max_audio_br', tsn)
 239     # convert to non-zero multiple of 64 for ffmpeg compatibility
 240     if rate:
 241         return _trunc64(rate)
 242     return 448
 243
 244 def get_section(tsn):
 245     return ['_tivo_SD', '_tivo_HD'][isHDtivo(tsn)]
 246
 247 def get_tsn(name, tsn=None, raw=False):
 248     if tsn and config.has_section('_tivo_' + tsn):
 249         try:
 250             return config.get('_tivo_' + tsn, name, raw)
 251         except NoOptionError:
 252             pass
 253     section_name = get_section(tsn)
 254     if config.has_section(section_name):
 255         try:
 256             return config.get(section_name, name, raw)
 257         except NoOptionError:
 258             pass
 259     try:
 260         return config.get('Server', name, raw)
 261     except NoOptionError:
 262         pass
 263     return None
 264
 265 def getAudioCodec(tsn=None):
 266     return get_tsn('audio_codec', tsn)
 267
 268 def getAudioCH(tsn=None):
 269     return get_tsn('audio_ch', tsn)
 270
 271 def getAudioFR(tsn=None):
 272     return get_tsn('audio_fr', tsn)
 273
 274 def getAudioLang(tsn=None):
 275     return get_tsn('audio_lang', tsn)
 276
 277 def getCopyTS(tsn=None):
 278     return get_tsn('copy_ts', tsn)
 279
 280 def getVideoFPS(tsn=None):
 281     return get_tsn('video_fps', tsn)
 282
 283 def getVideoCodec(tsn=None):
 284     return get_tsn('video_codec', tsn)
 285
 286 def getFormat(tsn=None):
 287     return get_tsn('format', tsn)
 288
 289 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 290 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 291 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 292 def strtod(value):
 293     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 294                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 295                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 296                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 297     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 298     m = p.match(value)
 299     if not m:
 300         raise SyntaxError('Invalid bit value syntax')
 301     (coef, prefix, power, byte) = m.groups()
 302     if prefix is None:
 303         value = float(coef)
 304     else:
 305         exponent = float(prefixes[prefix])
 306         if power == 'i':
 307             # Use powers of 2
 308             value = float(coef) * pow(2.0, exponent / 0.3)
 309         else:
 310             # Use powers of 10
 311             value = float(coef) * pow(10.0, exponent)
 312     if byte == 'B': # B == Byte, b == bit
 313         value *= 8;
 314     return value
 315
 316 def init_logging():
 317     if (config.has_section('loggers') and
 318         config.has_section('handlers') and
 319         config.has_section('formatters')):
 320
 321         logging.config.fileConfig(config_files)
 322
 323     elif getDebug():
 324         logging.basicConfig(level=logging.DEBUG)
 325     else:
 326         logging.basicConfig(level=logging.INFO)