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 datetime, timedelta
  10 import config
  11 import time
  12
  13 SCRIPTDIR = os.path.dirname(__file__)
  14
  15 CLASS_NAME = 'Video'
  16
  17 debug = config.getDebug()
  18 hack83 = config.getHack83()
  19 def debug_write(data):
  20     if debug:
  21         debug_out = []
  22         debug_out.append('Video.py - ')
  23         for x in data:
  24             debug_out.append(str(x))
  25         fdebug = open('debug.txt', 'a')
  26         fdebug.write(' '.join(debug_out))
  27         fdebug.close()
  28 if hack83:
  29     debug_write(['Hack83 is enabled.\n'])
  30
  31 class Video(Plugin):
  32
  33     CONTENT_TYPE = 'x-container/tivo-videos'
  34
  35     # Used for 8.3's broken requests
  36     count = 0
  37     request_history = {}
  38
  39     def hack(self, handler, query, subcname):
  40         debug_write(['Hack new request ------------------------', '\n'])
  41         debug_write(['Hack TiVo request is: \n', query, '\n'])
  42         queryAnchor = ''
  43         rightAnchor = ''
  44         leftAnchor = ''
  45         tsn =  handler.headers.getheader('tsn', '')
  46
  47         #not a tivo
  48         if not tsn:
  49             debug_write(['Hack this was not a TiVo request.', '\n'])
  50             return query, None
  51
  52         #this breaks up the anchor item request into seperate parts
  53         if 'AnchorItem' in query and (query['AnchorItem']) != ['Hack8.3']:
  54             if "".join(query['AnchorItem']).find('Container=') >= 0:
  55                 #This is a folder
  56                 queryAnchor = unquote_plus("".join(query['AnchorItem'])).split('Container=')[-1]
  57                 (leftAnchor, rightAnchor) = queryAnchor.rsplit('/', 1)
  58             else:
  59                 #This is a file
  60                 queryAnchor = unquote_plus("".join(query['AnchorItem'])).split('/',1)[-1]
  61                 (leftAnchor, rightAnchor) = queryAnchor.rsplit('/', 1)
  62             debug_write(['Hack queryAnchor: ', queryAnchor, ' leftAnchor: ', leftAnchor, ' rightAnchor: ', rightAnchor, '\n'])
  63
  64         try:
  65             path, state, = self.request_history[tsn]
  66         except KeyError:
  67             #Never seen this tsn, starting new history
  68             debug_write(['New TSN.', '\n'])
  69             path = []
  70             state = {}
  71             self.request_history[tsn] = (path, state)
  72             state['query'] = query
  73             state['page'] = ''
  74             state['time'] = int(time.time()) + 1000
  75
  76         debug_write(['Hack our saved request is: \n', state['query'], '\n'])
  77
  78         current_folder = subcname.split('/')[-1]
  79
  80         #Needed to get list of files
  81         def VideoFileFilter(file):
  82             full_path = os.path.join(filePath, file)
  83
  84             if os.path.isdir(full_path):
  85                 return True
  86             return transcode.suported_format(full_path)
  87
  88         #Begin figuring out what the request TiVo sent us means
  89         #There are 7 options that can occur
  90
  91         #1. at the root - This request is always accurate
  92         if len(subcname.split('/')) == 1:
  93             debug_write(['Hack we are at the root. Saving query, Clearing state[page].', '\n'])
  94             path[:] = [current_folder]
  95             state['query'] = query
  96             state['page'] = ''
  97             return state['query'], path
  98
  99         #2. entering a new folder
 100         #If there is no AnchorItem in the request then we must
 101         #be entering a new folder.
 102         if 'AnchorItem' not in query:
 103             debug_write(['Hack we are entering a new folder. Saving query, setting time, setting state[page].', '\n'])
 104             path[:] = subcname.split('/')
 105             state['query'] = query
 106             state['time'] = int(time.time())
 107             filePath = self.get_local_path(handler, state['query'])
 108             files, total, start = self.get_files(handler, state['query'], VideoFileFilter)
 109             if len(files) >= 1:
 110                 state['page'] = files[0]
 111             else:
 112                 state['page'] = ''
 113             return state['query'], path
 114
 115         #3. Request a page after pyTivo sent a 302 code
 116         #we know this is the proper page
 117         if "".join(query['AnchorItem']) == 'Hack8.3':
 118             debug_write(['Hack requested page from 302 code. Returning saved query, ', '\n'])
 119             return state['query'], path
 120
 121         #4. this is a request for a file
 122         if 'ItemCount' in query and int("".join(query['ItemCount'])) == 1:
 123             debug_write(['Hack requested a file', '\n'])
 124             #Everything in this request is right except the container
 125             query['Container'] = ["/".join(path)]
 126             return query, path
 127
 128         ##All remaining requests could be a second erroneous request
 129         #for each of the following we will pause to see if a correct
 130         #request is coming right behind it.
 131
 132         #Sleep just in case the erroneous request came first
 133         #this allows a proper request to be processed first
 134         debug_write(['Hack maybe erroneous request, sleeping.', '\n'])
 135         time.sleep(.25)
 136
 137         #5. scrolling in a folder
 138         #This could be a request to exit a folder
 139         #or scroll up or down within the folder
 140         #First we have to figure out if we are scrolling
 141         if 'AnchorOffset' in query:
 142             debug_write(['Hack Anchor offset was in query. leftAnchor needs to match ', "/".join(path), '\n'])
 143             if leftAnchor == str("/".join(path)):
 144                 debug_write(['Hack leftAnchor matched.', '\n'])
 145                 query['Container'] = ["/".join(path)]
 146                 filePath = self.get_local_path(handler, query)
 147                 files, total, start = self.get_files(handler, query, VideoFileFilter)
 148                 debug_write(['Hack saved page is= ', state['page'], ' top returned file is= ', files[0], '\n'])
 149                 #If the first file returned equals the top of the page
 150                 #then we haven't scrolled pages
 151                 if files[0] != str(state['page']):
 152                     debug_write(['Hack this is scrolling within a folder.', '\n'])
 153                     filePath = self.get_local_path(handler, query)
 154                     files, total, start = self.get_files(handler, query, VideoFileFilter)
 155                     state['page'] = files[0]
 156                     return query, path
 157
 158         #The only remaining options are exiting a folder or
 159         #this is a erroneous second request.
 160
 161         #6. this an extraneous request
 162         #this came within a second of a valid request
 163         #just use that request.
 164         if (int(time.time()) - state['time']) <= 1:
 165             debug_write(['Hack erroneous request, send a 302 error', '\n'])
 166             filePath = self.get_local_path(handler, query)
 167             files, total, start = self.get_files(handler, query, VideoFileFilter)
 168             return None, path
 169         #7. this is a request to exit a folder
 170         #this request came by itself it must be to exit a folder
 171         else:
 172             debug_write(['Hack over 1 second, must be request to exit folder', '\n'])
 173             path.pop()
 174             downQuery = {}
 175             downQuery['Command'] = query['Command']
 176             downQuery['SortOrder'] = query['SortOrder']
 177             downQuery['ItemCount'] = query['ItemCount']
 178             downQuery['Filter'] = query['Filter']
 179             downQuery['Container'] = ["/".join(path)]
 180             state['query'] = downQuery
 181             return None, path
 182
 183         #just in case we missed something.
 184         debug_write(['Hack ERROR, should not have made it here.  Trying to recover.', '\n'])
 185         return state['query'], path
 186
 187     def send_file(self, handler, container, name):
 188
 189         #No longer a 'cheep' hack :p
 190         if handler.headers.getheader('Range') and not handler.headers.getheader('Range') == 'bytes=0-':
 191             handler.send_response(206)
 192             handler.send_header('Connection', 'close')
 193             handler.send_header('Content-Type', 'video/x-tivo-mpeg')
 194             handler.send_header('Transfer-Encoding', 'chunked')
 195             handler.send_header('Server', 'TiVo Server/1.4.257.475')
 196             handler.end_headers()
 197             handler.wfile.write("\x30\x0D\x0A")
 198             return
 199
 200         tsn =  handler.headers.getheader('tsn', '')
 201
 202         o = urlparse("http://fake.host" + handler.path)
 203         path = unquote_plus(o[2])
 204         handler.send_response(200)
 205         handler.end_headers()
 206         transcode.output_video(container['path'] + path[len(name)+1:], handler.wfile, tsn)
 207
 208
 209     def __isdir(self, full_path):
 210         return os.path.isdir(full_path)
 211
 212     def __duration(self, full_path):
 213         return transcode.video_info(full_path)[4]
 214
 215     def __est_size(self, full_path):
 216         #Size is estimated by taking audio and video bit rate adding 2%
 217
 218         if transcode.tivo_compatable(full_path):  # Is TiVo compatible mpeg2
 219             return int(os.stat(full_path).st_size)
 220         else:  # Must be re-encoded
 221             audioBPS = strtod(config.getAudioBR())
 222             videoBPS = strtod(config.getVideoBR())
 223             bitrate =  audioBPS + videoBPS
 224             return int((self.__duration(full_path)/1000)*(bitrate * 1.02 / 8))
 225
 226     def __getMetadataFromTxt(self, full_path):
 227         metadata = {}
 228
 229         default_file = os.path.join(os.path.split(full_path)[0], 'default.txt')
 230         description_file = full_path + '.txt'
 231
 232         metadata.update(self.__getMetadataFromFile(default_file))
 233         metadata.update(self.__getMetadataFromFile(description_file))
 234
 235         return metadata
 236
 237     def __getMetadataFromFile(self, file):
 238         metadata = {}
 239
 240         if os.path.exists(file):
 241             for line in open(file):
 242                 if line.strip().startswith('#'):
 243                     continue
 244                 if not ':' in line:
 245                     continue
 246
 247                 key, value = line.split(':', 1)
 248                 key = key.strip()
 249                 value = value.strip()
 250
 251                 if key.startswith('v'):
 252                     if key in metadata:
 253                         metadata[key].append(value)
 254                     else:
 255                         metadata[key] = [value]
 256                 else:
 257                     metadata[key] = value
 258
 259         return metadata
 260
 261     def __metadata(self, full_path):
 262
 263         metadata = {}
 264
 265         base_path, title = os.path.split(full_path)
 266         now = datetime.now()
 267         originalAirDate = datetime.fromtimestamp(os.stat(full_path).st_ctime)
 268         duration = self.__duration(full_path)
 269         duration_delta = timedelta(milliseconds = duration)
 270
 271         metadata['title'] = '.'.join(title.split('.')[:-1])
 272         metadata['seriesTitle'] = os.path.split(base_path)[1]
 273         metadata['originalAirDate'] = originalAirDate.isoformat()
 274         metadata['time'] = now.isoformat()
 275         metadata['startTime'] = now.isoformat()
 276         metadata['stopTime'] = (now + duration_delta).isoformat()
 277
 278         metadata.update( self.__getMetadataFromTxt(full_path) )
 279
 280         metadata['size'] = self.__est_size(full_path)
 281         metadata['duration'] = duration
 282
 283         min = duration_delta.seconds / 60
 284         sec = duration_delta.seconds % 60
 285         hours = min / 60
 286         min = min % 60
 287         metadata['iso_durarion'] = 'P' + str(duration_delta.days) + 'DT' + str(hours) + 'H' + str(min) + 'M' + str(sec) + 'S'
 288
 289         return metadata
 290
 291     def QueryContainer(self, handler, query):
 292
 293         subcname = query['Container'][0]
 294
 295         ##If you are running 8.3 software you want to enable hack83 in the config file
 296         if hack83:
 297             print '========================================================================='
 298             query, hackPath = self.hack(handler, query, subcname)
 299             print 'Tivo said: ' + subcname + ' || Hack said: ' + "/".join(hackPath)
 300             debug_write(['Hack Tivo said: ', subcname, ' || Hack said: ' , "/".join(hackPath), '\n'])
 301             subcname = "/".join(hackPath)
 302
 303             if not query:
 304                 debug_write(['Hack sending 302 redirect page', '\n'])
 305                 handler.send_response(302)
 306                 handler.send_header('Location ', 'http://' + handler.headers.getheader('host') + '/TiVoConnect?Command=QueryContainer&AnchorItem=Hack8.3&Container=' + "/".join(hackPath))
 307                 handler.end_headers()
 308                 return
 309         #End Hack mess
 310
 311         cname = subcname.split('/')[0]
 312
 313         if not handler.server.containers.has_key(cname) or not self.get_local_path(handler, query):
 314             handler.send_response(404)
 315             handler.end_headers()
 316             return
 317
 318         def video_file_filter(file, type = None):
 319             full_path = file
 320             if os.path.isdir(full_path):
 321                 return True
 322             return transcode.suported_format(full_path)
 323
 324         files, total, start = self.get_files(handler, query, video_file_filter)
 325
 326         videos = []
 327         for file in files:
 328             video = VideoDetails()
 329             video['name'] = os.path.split(file)[1]
 330             video['path'] = file
 331             video['title'] = os.path.split(file)[1]
 332             video['is_dir'] = self.__isdir(file)
 333             if not  video['is_dir']:
 334                 video.update(self.__metadata(file))
 335
 336             videos.append(video)
 337
 338         handler.send_response(200)
 339         handler.end_headers()
 340         t = Template(file=os.path.join(SCRIPTDIR,'templates', 'container.tmpl'))
 341         t.name = subcname
 342         t.total = total
 343         t.start = start
 344         t.videos = videos
 345         t.quote = quote
 346         t.escape = escape
 347         handler.wfile.write(t)
 348
 349     def TVBusQuery(self, handler, query):
 350
 351         file = query['File'][0]
 352         path = self.get_local_path(handler, query)
 353         file_path = os.path.join(path, file)
 354
 355         file_info = VideoDetails()
 356         file_info.update(self.__metadata(file_path))
 357
 358         handler.send_response(200)
 359         handler.end_headers()
 360         t = Template(file=os.path.join(SCRIPTDIR,'templates', 'TvBus.tmpl'))
 361         t.video = file_info
 362         t.escape = escape
 363         handler.wfile.write(t)
 364
 365 class VideoDetails(DictMixin):
 366
 367     def __init__(self, d = None):
 368         if d:
 369             self.d = d
 370         else:
 371             self.d = {}
 372
 373     def __getitem__(self, key):
 374         if key not in self.d:
 375             self.d[key] = self.default(key)
 376         return self.d[key]
 377
 378     def __contains__(self, key):
 379         return True
 380
 381     def __setitem__(self, key, value):
 382         self.d[key] = value
 383
 384     def __delitem__(self):
 385         del self.d[key]
 386
 387     def keys(self):
 388         return self.d.keys()
 389
 390     def __iter__(self):
 391         return self.d.__iter__()
 392
 393     def iteritems(self):
 394         return self.d.iteritems()
 395
 396     def default(self, key):
 397         defaults = {
 398             'showingBits' : '0',
 399             'episodeNumber' : '0',
 400             'displayMajorNumber' : '0',
 401             'displayMinorNumber' : '0',
 402             'isEpisode' : 'true',
 403             'colorCode' : ('COLOR', '4'),
 404             'showType' : ('SERIES', '5'),
 405             'tvRating' : ('NR', '7'),
 406         }
 407         if key in defaults:
 408             return defaults[key]
 409         elif key.startswith('v'):
 410             return []
 411         else:
 412             return ''
 413
 414
 415 # Parse a bitrate using the SI/IEEE suffix values as if by ffmpeg
 416 # For example, 2K==2000, 2Ki==2048, 2MB==16000000, 2MiB==16777216
 417 # Algorithm: http://svn.mplayerhq.hu/ffmpeg/trunk/libavcodec/eval.c
 418 def strtod(value):
 419     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}
 420     p = re.compile(r'^(\d+)(?:([yzafpnumcdhkKMGTPEZY])(i)?)?([Bb])?$')
 421     m = p.match(value)
 422     if m is None:
 423         raise SyntaxError('Invalid bit value syntax')
 424     (coef, prefix, power, byte) = m.groups()
 425     if prefix is None:
 426         value = float(coef)
 427     else:
 428         exponent = float(prefixes[prefix])
 429         if power == "i":
 430             # Use powers of 2
 431             value = float(coef) * pow(2.0, exponent/0.3)
 432         else:
 433             # Use powers of 10
 434             value = float(coef) * pow(10.0, exponent)
 435     if byte == "B": # B==Byte, b=bit
 436         value *= 8;
 437     return value