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