plugins/video/video.py

   1 import transcode, os, socket, re
   2 from Cheetah.Template import Template
   3 from plugin import Plugin
   4 from urllib import unquote_plus, quote, unquote
   5 from urlparse import urlparse
   6 from xml.sax.saxutils import escape
   7 from lrucache import LRUCache
   8 from UserDict import DictMixin
   9 from datetime import timedelta
  10 import config
  11
  12 SCRIPTDIR = os.path.dirname(__file__)
  13
  14 CLASS_NAME = 'Video'
  15
  16 class Video(Plugin):
  17
  18     CONTENT_TYPE = 'x-container/tivo-videos'
  19
  20     def send_file(self, handler, container, name):
  21
  22         #No longer a 'cheep' hack :p
  23         if handler.headers.getheader('Range') and not handler.headers.getheader('Range') == 'bytes=0-':
  24             handler.send_response(206)
  25             handler.send_header('Connection', 'close')
  26             handler.send_header('Content-Type', 'video/x-tivo-mpeg')
  27             handler.send_header('Transfer-Encoding', 'chunked')
  28             handler.send_header('Server', 'TiVo Server/1.4.257.475')
  29             handler.end_headers()
  30             handler.wfile.write("\x30\x0D\x0A")
  31             return
  32
  33         tsn =  handler.headers.getheader('tsn', '')
  34
  35         o = urlparse("http://fake.host" + handler.path)
  36         path = unquote_plus(o[2])
  37         handler.send_response(200)
  38         handler.end_headers()
  39         transcode.output_video(container['path'] + path[len(name)+1:], handler.wfile, tsn)
  40
  41
  42     def __isdir(self, full_path):
  43         return os.path.isdir(full_path)
  44
  45     def __duration(self, full_path):
  46         return transcode.video_info(full_path)[4]
  47
  48     def __est_size(self, full_path):
  49         #Size is estimated by taking audio and video bit rate adding 2%
  50
  51         if transcode.tivo_compatable(full_path):  # Is TiVo compatible mpeg2
  52             return int(os.stat(full_path).st_size)
  53         else:  # Must be re-encoded
  54             audioBPS = strtod(config.getAudioBR())
  55             videoBPS = strtod(config.getVideoBR())
  56             bitrate =  audioBPS + videoBPS
  57             return int((self.__duration(full_path)/1000)*(bitrate * 1.02 / 8))
  58
  59     def __getMetadateFromTxt(self, full_path):
  60         metadata = {}
  61
  62         description_file = full_path + '.txt'
  63         if os.path.exists(description_file):
  64             for line in open(description_file):
  65                 if line.strip().startswith('#'):
  66                     continue
  67                 if not ':' in line:
  68                     continue
  69
  70                 key, value = line.split(':', 1)
  71                 key = key.strip()
  72                 value = value.strip()
  73
  74                 if key.startswith('v'):
  75                     if key in metadata:
  76                         metadata[key].append(value)
  77                     else:
  78                         metadata[key] = [value]
  79                 else:
  80                     metadata[key] = value
  81
  82         return metadata
  83
  84     def __metadata(self, full_path):
  85
  86         metadata = {}
  87
  88         metadata.update( self.__getMetadateFromTxt(full_path) )
  89
  90         metadata['size'] = self.__est_size(full_path)
  91         metadata['duration'] = self.__duration(full_path)
  92
  93         duration = timedelta(milliseconds = metadata['duration'])
  94         metadata['iso_durarion'] = 'P' + str(duration.days) + 'DT' + str(duration.seconds) + 'S'
  95
  96         return metadata
  97
  98     def QueryContainer(self, handler, query):
  99
 100         subcname = query['Container'][0]
 101         cname = subcname.split('/')[0]
 102
 103         if not handler.server.containers.has_key(cname) or not self.get_local_path(handler, query):
 104             handler.send_response(404)
 105             handler.end_headers()
 106             return
 107
 108         def video_file_filter(file):
 109             path = self.get_local_path(handler, query)
 110             full_path = os.path.join(path, file)
 111             if os.path.isdir(full_path):
 112                 return True
 113             return transcode.suported_format(full_path)
 114
 115         files, total, start = self.get_files(handler, query, video_file_filter)
 116
 117         videos = []
 118         for file in files:
 119             path = self.get_local_path(handler, query)
 120             full_path = os.path.join(path, file)
 121
 122             video = VideoDetails()
 123             video['name'] = file
 124             video['title'] = file
 125             video['is_dir'] = self.__isdir(full_path)
 126             if not  video['is_dir']:
 127                 video['title'] = '.'.join(file.split('.')[:-1])
 128                 video.update(self.__metadata(full_path))
 129
 130             videos.append(video)
 131
 132         handler.send_response(200)
 133         handler.end_headers()
 134         t = Template(file=os.path.join(SCRIPTDIR,'templates', 'container.tmpl'))
 135         t.name = subcname
 136         t.total = total
 137         t.start = start
 138         t.videos = videos
 139         t.quote = quote
 140         t.escape = escape
 141         handler.wfile.write(t)
 142
 143     def TVBusQuery(self, handler, query):
 144
 145         file = query['File'][0]
 146         path = self.get_local_path(handler, query)
 147         file_path = os.path.join(path, file)
 148
 149
 150         file_info = VideoDetails()
 151         file_info['seriesTitle'] = os.path.split(path)[-1]
 152         file_info['title'] = '.'.join(file.split('.')[:-1])
 153         file_info.update(self.__metadata(file_path))
 154
 155         print file_info
 156
 157         handler.send_response(200)
 158         handler.end_headers()
 159         t = Template(file=os.path.join(SCRIPTDIR,'templates', 'TvBus.tmpl'))
 160         t.video = file_info
 161         handler.wfile.write(t)
 162
 163 class VideoDetails(DictMixin):
 164
 165     def __init__(self, d = None):
 166         if d:
 167             self.d = d
 168         else:
 169             self.d = {}
 170
 171     def __getitem__(self, key):
 172         if key not in self.d:
 173             self.d[key] = self.default(key)
 174         return self.d[key]
 175
 176     def __contains__(self, key):
 177         return True
 178
 179     def __setitem__(self, key, value):
 180         self.d[key] = value
 181
 182     def __delitem__(self):
 183         del self.d[key]
 184
 185     def keys(self):
 186         return self.d.keys()
 187
 188     def __iter__(self):
 189         return self.d.__iter__()
 190
 191     def iteritems(self):
 192         return self.d.iteritems()
 193
 194     def default(self, key):
 195         defaults = {
 196             'showingBits' : '0',
 197             'episodeNumber' : '0',
 198             'displayMajorNumber' : '0',
 199             'displayMinorNumber' : '0',
 200             'isEpisode' : 'true',
 201             'colorCode' : ('COLOR', '4'),
 202             'showType' : ('SERIES', '5'),
 203             'tvRating' : ('NR', '7'),
 204         }
 205         if key in defaults:
 206             return defaults[key]
 207         elif key.startswith('v'):
 208             return ['Default']
 209         else:
 210             return 'Default'
 211
 212
 213 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 214 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 215 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 216 def strtod(value):
 217     prefixes = {"y":-24,"z":-21,"a":-18,"f":-15,"p":-12,"n":-9,"u":-6,"m":-3,"c":-2,"d":-1,"h":2,"k":3,"K":3,"M":6,"G":9,"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