def __init__ (self, player, featurefactory):
self._featurefactory = featurefactory
self._player = player
tagnames = self._tagnames (player, featurefactory)
self._playinglist = Playinglist(player, tagnames)
self._featuresdb = {}
class TvizDB (object):
'''
Store index2features inferred from tags using defined rules for each song on the playinglist
'''
def __init__ (self, player, featurefactory):
self._featurefactory = featurefactory
self._player = player
tagnames = self._tagnames (player, featurefactory)
self._playinglist = Playinglist(player, tagnames)
self._featuresdb = {}
def _tagnames (self, player, featurefactory):
playertagnames = [tagname for tagname in player.tagnames]
return featurefactory.tagnames + playertagnames
def len(self):
return self._playinglist.len()
def index2key(self, index):
return self._playinglist.index2key(index)
def playingkeys(self):
return self._playinglist.getKeys()
def index2features(self, index):
assert index >= 0
assert index < self.len()
key = self.index2key(index)
# print "xxx INDEX: ", index, "KEY: ", key
return self._featuresdb [key]
def update(self):
out = self._playinglist.update()
# print "xxx **** PLAYINGLIST ****", out
# print 'xxx LEN: \n', self._playinglist._len
# print 'xxx INDEX: \n', self._playinglist._index
# print 'xxx KEYS: \n', self._playinglist._keys
# print 'xxx TAGS: \n', self._playinglist._tagdb
# print "xxx **** PLAYINGLIST Update Status", out
if out['pchanged']:
# print 'xxx starting tags2features'
self.tags2features()
self._updateTandas()
return out
def getSong(self,index):
return self.index2features(index)
def getTanda(self,index):
for tanda in self._tandas:
if tanda.start <= index < tanda.end:
return tanda
raise Exception("index out of bound: " + index)
def currentSong(self):
index = self._playinglist.index()
# print "xxx CURRENT INDEX: ", index
return self.getSong(index)
def currentTanda(self):
index = self._playinglist.index()
return self.getTanda(index)
def nextTanda(self):
current = self.currentTanda()
nextindex = current.end + 1
if nextindex >= self.len():
return None
return self.getTanda(current.end + 1)
index = self._playinglist.index
for tanda in self._tandas:
if tanda.start < i <= tanda.end:
return tanda
def tags2features(self):
tagslist = plist = self._playinglist.tagslist()
factory = self._featurefactory
# TODO: make this itteration overplaylist?
for tags in tagslist:
userfeatures = factory.tags2features(tags)
stdfeatures = self._player.tags2features(tags)
fdict=userfeatures
fdict.update(stdfeatures)
features = Features(fdict)
# print 'xxx Features', features.key, repr(features)
self._featuresdb.update({features.key:features})
# print '**** tags2features ****'
# print 'xxx taglist: ', tagslist
# print 'xxx featuresdb: ', self._featuresdb
def _updateTandas(self):
def isbreakfn (key):
return self._featuresdb[key].isbreak
self._tandas = []
for i, j,keys in tandait(self.playingkeys(), isbreakfn):
songfeatureslist = [self._featuresdb[key] for key in keys]
# print 'yyy:', songfeatureslist
tanda = TvizTanda(songfeatureslist)
tanda.start = i
tanda.end = j
tanda.songs = songfeatureslist
self._tandas.append(tanda)