config.py

   1 import ConfigParser
   2 import getopt
   3 import logging
   4 import logging.config
   5 import os
   6 import re
   7 import random
   8 import string
   9 import sys
  10 from ConfigParser import NoOptionError
  11
  12 guid = ''.join([random.choice(string.letters) for i in range(10)])
  13
  14 config = ConfigParser.ConfigParser()
  15
  16 p = os.path.dirname(__file__)
  17 config_files = ['/etc/pyTivo.conf', os.path.join(p, 'pyTivo.conf')]
  18 configs_found = []
  19
  20 def init(argv):
  21     global config_files
  22     global configs_found
  23
  24     try:
  25         opts, _ = getopt.getopt(argv, 'c:e:', ['config=', 'extraconf='])
  26     except getopt.GetoptError, msg:
  27         print msg
  28
  29     for opt, value in opts:
  30         if opt in ('-c', '--config'):
  31             config_files = [value]
  32         elif opt in ('-e', '--extraconf'):
  33             config_files.append(value)
  34
  35     configs_found = config.read(config_files)
  36     if not configs_found:
  37         print ('ERROR: pyTivo.conf does not exist.\n' +
  38                'You must create this file before running pyTivo.')
  39         sys.exit(1)
  40
  41 def reset():
  42     global config
  43     newconfig = ConfigParser.ConfigParser()
  44     newconfig.read(config_files)
  45     config = newconfig
  46
  47 def write():
  48     f = open(configs_found[-1], 'w')
  49     config.write(f)
  50     f.close()
  51
  52 def getGUID():
  53     if config.has_option('Server', 'GUID'):
  54         return config.get('Server', 'GUID')
  55     else:
  56         return guid
  57
  58 def getTivoUsername():
  59     return config.get('Server', 'tivo_username')
  60
  61 def getTivoPassword():
  62     return config.get('Server', 'tivo_password')
  63
  64 def getBeaconAddresses():
  65     if config.has_option('Server', 'beacon'):
  66         beacon_ips = config.get('Server', 'beacon')
  67     else:
  68         beacon_ips = '255.255.255.255'
  69     return beacon_ips
  70
  71 def getPort():
  72     return config.get('Server', 'Port')
  73
  74 def get169Blacklist(tsn):  # tivo does not pad 16:9 video
  75     return tsn and not isHDtivo(tsn) and not get169Letterbox(tsn)
  76     # verified Blacklist Tivo's are ('130', '240', '540')
  77     # It is assumed all remaining non-HD and non-Letterbox tivos are Blacklist
  78
  79 def get169Letterbox(tsn):  # tivo pads 16:9 video for 4:3 display
  80     return tsn and tsn[:3] in ['649']
  81
  82 def get169Setting(tsn):
  83     if not tsn:
  84         return True
  85
  86     tsnsect = '_tivo_' + tsn
  87     if config.has_section(tsnsect):
  88         if config.has_option(tsnsect, 'aspect169'):
  89             try:
  90                 return config.getboolean(tsnsect, 'aspect169')
  91             except ValueError:
  92                 pass
  93
  94     if get169Blacklist(tsn) or get169Letterbox(tsn):
  95         return False
  96
  97     return True
  98
  99 def getShares(tsn=''):
 100     shares = [(section, dict(config.items(section)))
 101               for section in config.sections()
 102               if not (section.startswith('_tivo_')
 103                       or section.startswith('logger_')
 104                       or section.startswith('handler_')
 105                       or section.startswith('formatter_')
 106                       or section in ('Server', 'loggers', 'handlers',
 107                                      'formatters')
 108               )
 109     ]
 110
 111     tsnsect = '_tivo_' + tsn
 112     if config.has_section(tsnsect) and config.has_option(tsnsect, 'shares'):
 113         # clean up leading and trailing spaces & make sure ref is valid
 114         tsnshares = []
 115         for x in config.get(tsnsect, 'shares').split(','):
 116             y = x.strip()
 117             if config.has_section(y):
 118                 tsnshares.append((y, dict(config.items(y))))
 119         if tsnshares:
 120             shares = tsnshares
 121
 122     return shares
 123
 124 def getDebug():
 125     try:
 126         return config.getboolean('Server', 'debug')
 127     except NoOptionError, ValueError:
 128         return False
 129
 130 def getOptres(tsn=None):
 131     if tsn and config.has_section('_tivo_' + tsn):
 132         try:
 133             return config.getboolean('_tivo_' + tsn, 'optres')
 134         except NoOptionError, ValueError:
 135             pass
 136     section_name = get_section(tsn)
 137     if config.has_section(section_name):
 138         try:
 139             return config.getboolean(section_name, 'optres')
 140         except NoOptionError, ValueError:
 141             pass
 142     try:
 143         return config.getboolean('Server', 'optres')
 144     except NoOptionError, ValueError:
 145         return False
 146
 147 def getPixelAR(ref):
 148     if config.has_option('Server', 'par'):
 149         try:
 150             return (True, config.getfloat('Server', 'par'))[ref]
 151         except NoOptionError, ValueError:
 152             pass
 153     return (False, 1.0)[ref]
 154
 155 def get(section, key):
 156     return config.get(section, key)
 157
 158 def getFFmpegWait():
 159     if config.has_option('Server', 'ffmpeg_wait'):
 160         return max(int(float(config.get('Server', 'ffmpeg_wait'))), 1)
 161     else:
 162         return 10
 163
 164 def getFFmpegTemplate(tsn):
 165     tmpl = get_tsn('ffmpeg_tmpl', tsn, True)
 166     if tmpl:
 167         return tmpl
 168     return '%(video_codec)s %(video_fps)s %(video_br)s %(max_video_br)s \
 169             %(buff_size)s %(aspect_ratio)s %(audio_br)s \
 170             %(audio_fr)s %(audio_ch)s %(audio_codec)s %(audio_lang)s \
 171             %(ffmpeg_pram)s %(format)s'
 172
 173 def getFFmpegPrams(tsn):
 174     return get_tsn('ffmpeg_pram', tsn, True)
 175
 176 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
 177     return bool(tsn and tsn[:3] in ['648', '652', '658', '663'])
 178
 179 def getValidWidths():
 180     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
 181
 182 def getValidHeights():
 183     return [1080, 720, 480] # Technically 240 is also supported
 184
 185 # Return the number in list that is nearest to x
 186 # if two values are equidistant, return the larger
 187 def nearest(x, list):
 188     return reduce(lambda a, b: closest(x, a, b), list)
 189
 190 def closest(x, a, b):
 191     da = abs(x - a)
 192     db = abs(x - b)
 193     if da < db or (da == db and a > b):
 194         return a
 195     else:
 196         return b
 197
 198 def nearestTivoHeight(height):
 199     return nearest(height, getValidHeights())
 200
 201 def nearestTivoWidth(width):
 202     return nearest(width, getValidWidths())
 203
 204 def getTivoHeight(tsn):
 205     height = get_tsn('height', tsn)
 206     if height:
 207         return nearestTivoHeight(int(height))
 208     return [480, 720][isHDtivo(tsn)]
 209
 210 def getTivoWidth(tsn):
 211     width = get_tsn('width', tsn)
 212     if width:
 213         return nearestTivoWidth(int(width))
 214     return [544, 1280][isHDtivo(tsn)]
 215
 216 def _trunc64(i):
 217     return max(int(strtod(i)) / 64000, 1) * 64
 218
 219 def getAudioBR(tsn=None):
 220     rate = get_tsn('audio_br', tsn)
 221     if not rate:
 222         rate = '448k'
 223     # convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 224     # compare audio_br to max_audio_br and return lowest
 225     return str(min(_trunc64(rate), getMaxAudioBR(tsn))) + 'k'
 226
 227 def _k(i):
 228     return str(int(strtod(i)) / 1000) + 'k'
 229
 230 def getVideoBR(tsn=None):
 231     rate = get_tsn('video_br', tsn)
 232     if rate:
 233         return _k(rate)
 234     return ['4096K', '16384K'][isHDtivo(tsn)]
 235
 236 def getMaxVideoBR(tsn=None):
 237     rate = get_tsn('max_video_br', tsn)
 238     if rate:
 239         return _k(rate)
 240     return '30000k'
 241
 242 def getVideoPCT(tsn=None):
 243     pct = get_tsn('video_pct', tsn)
 244     if pct:
 245         return float(pct)
 246     return 85
 247
 248 def getBuffSize(tsn=None):
 249     size = get_tsn('bufsize', tsn)
 250     if size:
 251         return _k(size)
 252     return ['1024k', '4096k'][isHDtivo(tsn)]
 253
 254 def getMaxAudioBR(tsn=None):
 255     rate = get_tsn('max_audio_br', tsn)
 256     # convert to non-zero multiple of 64 for ffmpeg compatibility
 257     if rate:
 258         return _trunc64(rate)
 259     return 448
 260
 261 def get_section(tsn):
 262     return ['_tivo_SD', '_tivo_HD'][isHDtivo(tsn)]
 263
 264 def get_tsn(name, tsn=None, raw=False):
 265     if tsn and config.has_section('_tivo_' + tsn):
 266         try:
 267             return config.get('_tivo_' + tsn, name, raw)
 268         except NoOptionError:
 269             pass
 270     section_name = get_section(tsn)
 271     if config.has_section(section_name):
 272         try:
 273             return config.get(section_name, name, raw)
 274         except NoOptionError:
 275             pass
 276     try:
 277         return config.get('Server', name, raw)
 278     except NoOptionError:
 279         pass
 280     return None
 281
 282 def getAudioCodec(tsn=None):
 283     return get_tsn('audio_codec', tsn)
 284
 285 def getAudioCH(tsn=None):
 286     return get_tsn('audio_ch', tsn)
 287
 288 def getAudioFR(tsn=None):
 289     return get_tsn('audio_fr', tsn)
 290
 291 def getAudioLang(tsn=None):
 292     return get_tsn('audio_lang', tsn)
 293
 294 def getCopyTS(tsn=None):
 295     return get_tsn('copy_ts', tsn)
 296
 297 def getVideoFPS(tsn=None):
 298     return get_tsn('video_fps', tsn)
 299
 300 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 301 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 302 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 303 def strtod(value):
 304     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 305                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 306                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 307                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 308     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 309     m = p.match(value)
 310     if not m:
 311         raise SyntaxError('Invalid bit value syntax')
 312     (coef, prefix, power, byte) = m.groups()
 313     if prefix is None:
 314         value = float(coef)
 315     else:
 316         exponent = float(prefixes[prefix])
 317         if power == 'i':
 318             # Use powers of 2
 319             value = float(coef) * pow(2.0, exponent / 0.3)
 320         else:
 321             # Use powers of 10
 322             value = float(coef) * pow(10.0, exponent)
 323     if byte == 'B': # B == Byte, b == bit
 324         value *= 8;
 325     return value
 326
 327 def init_logging():
 328     if (config.has_section('loggers') and
 329         config.has_section('handlers') and
 330         config.has_section('formatters')):
 331
 332         logging.config.fileConfig(config_files)
 333
 334     elif getDebug():
 335         logging.basicConfig(level=logging.DEBUG)
 336     else:
 337         logging.basicConfig(level=logging.INFO)