plugins/video/video.py

   1 import transcode, os, socket, re, urllib, zlib
   2 from Cheetah.Template import Template
   3 from plugin import Plugin, quote, unquote
   4 from urlparse import urlparse
   5 from xml.sax.saxutils import escape
   6 from lrucache import LRUCache
   7 from UserDict import DictMixin
   8 from datetime import datetime, timedelta
   9 import config
  10
  11 SCRIPTDIR = os.path.dirname(__file__)
  12
  13 CLASS_NAME = 'Video'
  14
  15 extfile = os.path.join(SCRIPTDIR, 'video.ext')
  16 try:
  17     extensions = file(extfile).read().split()
  18 except:
  19     extensions = None
  20
  21 class Video(Plugin):
  22
  23     CONTENT_TYPE = 'x-container/tivo-videos'
  24
  25     def video_file_filter(self, full_path, type=None):
  26         if os.path.isdir(full_path):
  27             return True
  28         if extensions:
  29             return os.path.splitext(full_path)[1].lower() in extensions
  30         else:
  31             return transcode.supported_format(full_path)
  32
  33     def send_file(self, handler, container, name):
  34         if handler.headers.getheader('Range') and \
  35            handler.headers.getheader('Range') != 'bytes=0-':
  36             handler.send_response(206)
  37             handler.send_header('Connection', 'close')
  38             handler.send_header('Content-Type', 'video/x-tivo-mpeg')
  39             handler.send_header('Transfer-Encoding', 'chunked')
  40             handler.end_headers()
  41             handler.wfile.write("\x30\x0D\x0A")
  42             return
  43
  44         tsn = handler.headers.getheader('tsn', '')
  45
  46         o = urlparse("http://fake.host" + handler.path)
  47         path = unquote(o[2])
  48         handler.send_response(200)
  49         handler.end_headers()
  50         transcode.output_video(container['path'] + path[len(name) + 1:],
  51                                handler.wfile, tsn)
  52
  53     def __isdir(self, full_path):
  54         return os.path.isdir(full_path)
  55
  56     def __duration(self, full_path):
  57         return transcode.video_info(full_path)[4]
  58
  59     def __est_size(self, full_path, tsn = ''):
  60         # Size is estimated by taking audio and video bit rate adding 2%
  61
  62         if transcode.tivo_compatable(full_path, tsn):
  63             # Is TiVo-compatible mpeg2
  64             return int(os.stat(full_path).st_size)
  65         else:
  66             # Must be re-encoded
  67             audioBPS = config.strtod(config.getAudioBR(tsn))
  68             videoBPS = config.strtod(config.getVideoBR(tsn))
  69             bitrate =  audioBPS + videoBPS
  70             return int((self.__duration(full_path) / 1000) *
  71                        (bitrate * 1.02 / 8))
  72
  73     def __getMetadataFromTxt(self, full_path):
  74         metadata = {}
  75
  76         default_file = os.path.join(os.path.split(full_path)[0], 'default.txt')
  77         description_file = full_path + '.txt'
  78
  79         metadata.update(self.__getMetadataFromFile(default_file))
  80         metadata.update(self.__getMetadataFromFile(description_file))
  81
  82         return metadata
  83
  84     def __getMetadataFromFile(self, file):
  85         metadata = {}
  86
  87         if os.path.exists(file):
  88             for line in open(file):
  89                 if line.strip().startswith('#'):
  90                     continue
  91                 if not ':' in line:
  92                     continue
  93
  94                 key, value = line.split(':', 1)
  95                 key = key.strip()
  96                 value = value.strip()
  97
  98                 if key.startswith('v'):
  99                     if key in metadata:
 100                         metadata[key].append(value)
 101                     else:
 102                         metadata[key] = [value]
 103                 else:
 104                     metadata[key] = value
 105
 106         return metadata
 107
 108     def __metadata(self, full_path, tsn =''):
 109         metadata = {}
 110
 111         base_path, title = os.path.split(full_path)
 112         now = datetime.now()
 113         originalAirDate = datetime.fromtimestamp(os.stat(full_path).st_ctime)
 114         duration = self.__duration(full_path)
 115         duration_delta = timedelta(milliseconds = duration)
 116
 117         metadata['title'] = '.'.join(title.split('.')[:-1])
 118         metadata['seriesTitle'] = metadata['title'] # default to the filename
 119         metadata['originalAirDate'] = originalAirDate.isoformat()
 120         metadata['time'] = now.isoformat()
 121         metadata['startTime'] = now.isoformat()
 122         metadata['stopTime'] = (now + duration_delta).isoformat()
 123
 124         metadata.update( self.__getMetadataFromTxt(full_path) )
 125
 126         metadata['size'] = self.__est_size(full_path, tsn)
 127         metadata['duration'] = duration
 128
 129         min = duration_delta.seconds / 60
 130         sec = duration_delta.seconds % 60
 131         hours = min / 60
 132         min = min % 60
 133         metadata['iso_duration'] = 'P' + str(duration_delta.days) + \
 134                                    'DT' + str(hours) + 'H' + str(min) + \
 135                                    'M' + str(sec) + 'S'
 136         return metadata
 137
 138     def QueryContainer(self, handler, query):
 139         tsn = handler.headers.getheader('tsn', '')
 140         subcname = query['Container'][0]
 141         cname = subcname.split('/')[0]
 142
 143         if not handler.server.containers.has_key(cname) or \
 144            not self.get_local_path(handler, query):
 145             handler.send_response(404)
 146             handler.end_headers()
 147             return
 148
 149         files, total, start = self.get_files(handler, query,
 150                                              self.video_file_filter)
 151
 152         videos = []
 153         local_base_path = self.get_local_base_path(handler, query)
 154         for file in files:
 155             video = VideoDetails()
 156             video['name'] = os.path.split(file)[1]
 157             video['path'] = file
 158             video['part_path'] = file.replace(local_base_path, '', 1)
 159             video['title'] = os.path.split(file)[1]
 160             video['is_dir'] = self.__isdir(file)
 161             video['small_path'] = subcname + '/' + video['name']
 162             if not video['is_dir']:
 163                 video['valid'] = transcode.supported_format(file)
 164                 if video['valid']:
 165                     video.update(self.__metadata(file, tsn))
 166
 167             videos.append(video)
 168
 169         handler.send_response(200)
 170         handler.end_headers()
 171         t = Template(file=os.path.join(SCRIPTDIR,'templates', 'container.tmpl'))
 172         t.container = cname
 173         t.name = subcname
 174         t.total = total
 175         t.start = start
 176         t.videos = videos
 177         t.quote = quote
 178         t.escape = escape
 179         t.crc = zlib.crc32
 180         t.guid = config.getGUID()
 181         handler.wfile.write(t)
 182
 183     def TVBusQuery(self, handler, query):
 184         tsn = handler.headers.getheader('tsn', '')
 185         file = query['File'][0]
 186         path = self.get_local_path(handler, query)
 187         file_path = path + file
 188
 189         file_info = VideoDetails()
 190         valid = transcode.supported_format(file_path)
 191         if valid:
 192             file_info.update(self.__metadata(file_path, tsn))
 193
 194         handler.send_response(200)
 195         handler.end_headers()
 196         t = Template(file=os.path.join(SCRIPTDIR,'templates', 'TvBus.tmpl'))
 197         t.video = file_info
 198         t.escape = escape
 199         handler.wfile.write(t)
 200
 201 class VideoDetails(DictMixin):
 202
 203     def __init__(self, d=None):
 204         if d:
 205             self.d = d
 206         else:
 207             self.d = {}
 208
 209     def __getitem__(self, key):
 210         if key not in self.d:
 211             self.d[key] = self.default(key)
 212         return self.d[key]
 213
 214     def __contains__(self, key):
 215         return True
 216
 217     def __setitem__(self, key, value):
 218         self.d[key] = value
 219
 220     def __delitem__(self):
 221         del self.d[key]
 222
 223     def keys(self):
 224         return self.d.keys()
 225
 226     def __iter__(self):
 227         return self.d.__iter__()
 228
 229     def iteritems(self):
 230         return self.d.iteritems()
 231
 232     def default(self, key):
 233         defaults = {
 234             'showingBits' : '0',
 235             'episodeNumber' : '0',
 236             'displayMajorNumber' : '0',
 237             'displayMinorNumber' : '0',
 238             'isEpisode' : 'true',
 239             'colorCode' : ('COLOR', '4'),
 240             'showType' : ('SERIES', '5'),
 241             'tvRating' : ('NR', '7')
 242         }
 243         if key in defaults:
 244             return defaults[key]
 245         elif key.startswith('v'):
 246             return []
 247         else:
 248             return ''