config.py

   1 import ConfigParser, os
   2 import re
   3 from ConfigParser import NoOptionError
   4
   5 BLACKLIST_169 = ('540', '649')
   6
   7 config = ConfigParser.ConfigParser()
   8 p = os.path.dirname(__file__)
   9 config.read(os.path.join(p, 'pyTivo.conf'))
  10
  11 def getGUID():
  12     if config.has_option('Server', 'GUID'):
  13         guid = config.get('Server', 'GUID')
  14     else:
  15         guid = '123456'
  16     return guid
  17
  18 def getBeaconAddresses():
  19     if config.has_option('Server', 'beacon'):
  20         beacon_ips = config.get('Server', 'beacon')
  21     else:
  22         beacon_ips = '255.255.255.255'
  23     return beacon_ips
  24
  25 def getPort():
  26     return config.get('Server', 'Port')
  27
  28 def get169Setting(tsn):
  29     if not tsn:
  30         return True
  31
  32     if config.has_section('_tivo_' + tsn):
  33         if config.has_option('_tivo_' + tsn, 'aspect169'):
  34             try:
  35                 return config.getboolean('_tivo_' + tsn, 'aspect169')
  36             except ValueError:
  37                 pass
  38
  39     if tsn[:3] in BLACKLIST_169:
  40         return False
  41
  42     return True
  43
  44 def getShares():
  45     shares = [(section, dict(config.items(section)))
  46               for section in config.sections()
  47               if not(section.startswith('_tivo_') or section == 'Server')]
  48
  49     for name, data in shares:
  50         if not data.get('auto_subshares', 'False').lower() == 'true':
  51             continue
  52
  53         base_path = data['path']
  54         for item in os.listdir(base_path):
  55             item_path = os.path.join(base_path, item)
  56             if not os.path.isdir(item_path):
  57                 continue
  58
  59             new_name = name + '/' + item
  60             new_data = dict(data)
  61             new_data['path'] = item_path
  62
  63             shares.append((new_name, new_data))
  64
  65     return shares
  66
  67 def getDebug():
  68     try:
  69         return config.getboolean('Server', 'debug')
  70     except NoOptionError, ValueError:
  71         return False
  72
  73 def getOptres():
  74     try:
  75         return config.getboolean('Server', 'optres')
  76     except NoOptionError, ValueError:
  77         return False
  78
  79 def get(section, key):
  80     return config.get(section, key)
  81
  82 def getFFMPEGTemplate(tsn):
  83     if tsn and config.has_section('_tivo_' + tsn):
  84         try:
  85             return config.get('_tivo_' + tsn, 'ffmpeg_prams', raw=True)
  86         except NoOptionError:
  87             pass
  88     try:
  89         return config.get('Server', 'ffmpeg_prams', raw=True)
  90     except NoOptionError: #default
  91         return '-vcodec mpeg2video -r 29.97 -b %(video_br)s -maxrate %(max_video_br)s -bufsize %(buff_size)s %(aspect_ratio)s -comment pyTivo.py %(audio_codec)s -ab %(audio_br)s -f vob -'
  92
  93 def isHDtivo(tsn):  # tsn's of High Definition Tivo's
  94     return tsn != '' and tsn[:3] in ['648', '652']
  95
  96 def getValidWidths():
  97     return [1920, 1440, 1280, 720, 704, 544, 480, 352]
  98
  99 def getValidHeights():
 100     return [1080, 720, 480] # Technically 240 is also supported
 101
 102 # Return the number in list that is nearest to x
 103 # if two values are equidistant, return the larger
 104 def nearest(x, list):
 105     return reduce(lambda a, b: closest(x, a, b), list)
 106
 107 def closest(x, a, b):
 108     if abs(x - a) < abs(x - b) or (abs(x - a) == abs(x - b) and a > b):
 109         return a
 110     else:
 111         return b
 112
 113 def nearestTivoHeight(height):
 114     return nearest(height, getValidHeights())
 115
 116 def nearestTivoWidth(width):
 117     return nearest(width, getValidWidths())
 118
 119 def getTivoHeight(tsn):
 120     if tsn and config.has_section('_tivo_' + tsn):
 121         try:
 122             height = config.getint('_tivo_' + tsn, 'height')
 123             return nearestTivoHeight(height)
 124         except NoOptionError:
 125             pass
 126     try:
 127         height = config.getint('Server', 'height')
 128         return nearestTivoHeight(height)
 129     except NoOptionError: #defaults for S3/S2 TiVo
 130         if isHDtivo(tsn):
 131             return 720
 132         else:
 133             return 480
 134
 135 def getTivoWidth(tsn):
 136     if tsn and config.has_section('_tivo_' + tsn):
 137         try:
 138             width = config.getint('_tivo_' + tsn, 'width')
 139             return nearestTivoWidth(width)
 140         except NoOptionError:
 141             pass
 142     try:
 143         width = config.getint('Server', 'width')
 144         return nearestTivoWidth(width)
 145     except NoOptionError: #defaults for S3/S2 TiVo
 146         if isHDtivo(tsn):
 147             return 1280
 148         else:
 149             return 544
 150
 151 def getAudioBR(tsn = None):
 152     #convert to non-zero multiple of 64 to ensure ffmpeg compatibility
 153     #compare audio_br to max_audio_br and return lowest
 154     if tsn and config.has_section('_tivo_' + tsn):
 155         try:
 156             audiobr = int(max(int(strtod(config.get('_tivo_' + tsn, 'audio_br'))/1000), 64)/64)*64
 157             return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 158         except NoOptionError:
 159             pass
 160     try:
 161         audiobr = int(max(int(strtod(config.get('Server', 'audio_br'))/1000), 64)/64)*64
 162         return str(min(audiobr, getMaxAudioBR(tsn))) + 'k'
 163     except NoOptionError: #defaults for S3/S2 TiVo
 164         if isHDtivo(tsn):
 165             return '384k'
 166         else:
 167             return '192k'
 168
 169 def getVideoBR(tsn = None):
 170     if tsn and config.has_section('_tivo_' + tsn):
 171         try:
 172             return config.get('_tivo_' + tsn, 'video_br')
 173         except NoOptionError:
 174             pass
 175     try:
 176         return config.get('Server', 'video_br')
 177     except NoOptionError: #defaults for S3/S2 TiVo
 178         if isHDtivo(tsn):
 179             return '8192k'
 180         else:
 181             return '4096K'
 182
 183 def getMaxVideoBR():
 184     try:
 185         return str(int(strtod(config.get('Server', 'max_video_br'))/1000)) + 'k'
 186     except NoOptionError: #default to 17Mi
 187         return '17408k'
 188
 189 def getBuffSize():
 190     try:
 191         return config.get('Server', 'bufsize')
 192     except NoOptionError: #default 1024k
 193         return '1024k'
 194
 195 def getMaxAudioBR(tsn = None):
 196     #convert to non-zero multiple of 64 for ffmpeg compatibility
 197     if tsn and config.has_section('_tivo_' + tsn):
 198         try:
 199             return int(int(strtod(config.get('_tivo_' + tsn, 'max_audio_br'))/1000)/64)*64
 200         except NoOptionError:
 201             pass
 202     try:
 203         return int(int(strtod(config.get('Server', 'max_audio_br'))/1000)/64)*64
 204     except NoOptionError:
 205         if isHDtivo(tsn):
 206             return int(448) #default to 448, max supported by HD TiVo's
 207         else:
 208             return int(384) #default to 384, max supported by mp2 audio (S2 TiVo)
 209
 210 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 211 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 212 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 213 def strtod(value):
 214     prefixes = {'y': -24, 'z': -21, 'a': -18, 'f': -15, 'p': -12,
 215                 'n': -9,  'u': -6,  'm': -3,  'c': -2,  'd': -1,
 216                 'h': 2,   'k': 3,   'K': 3,   'M': 6,   'G': 9,
 217                 'T': 12,  'P': 15,  'E': 18,  'Z': 21,  'Y': 24}
 218     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 219     m = p.match(value)
 220     if m is None:
 221         raise SyntaxError('Invalid bit value syntax')
 222     (coef, prefix, power, byte) = m.groups()
 223     if prefix is None:
 224         value = float(coef)
 225     else:
 226         exponent = float(prefixes[prefix])
 227         if power == 'i':
 228             # Use powers of 2
 229             value = float(coef) * pow(2.0, exponent / 0.3)
 230         else:
 231             # Use powers of 10
 232             value = float(coef) * pow(10.0, exponent)
 233     if byte == 'B': # B == Byte, b == bit
 234         value *= 8;
 235     return value