forked from 0x2620/pandora
109 lines
4 KiB
Python
109 lines
4 KiB
Python
# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division, with_statement
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from django.db import models
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from django.conf import settings
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from archive import extract
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import managers
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class Clip(models.Model):
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'''
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CREATE INDEX clip_clip_title_idx ON clip_clip (title ASC NULLS LAST);
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CREATE INDEX clip_clip_director_idx ON clip_clip (director ASC NULLS LAST);
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'''
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class Meta:
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unique_together = ("item", "start", "end")
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objects = managers.ClipManager()
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created = models.DateTimeField(auto_now_add=True)
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modified = models.DateTimeField(auto_now=True)
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public_id = models.CharField(max_length=128, unique=True)
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item = models.ForeignKey('item.Item', related_name='clips')
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#seconds
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start = models.FloatField(default=-1)
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end = models.FloatField(default=-1)
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duration = models.FloatField(default=0)
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#get from annotation
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duration = models.FloatField(default=0, db_index=True)
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hue = models.FloatField(default=0, db_index=True)
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saturation = models.FloatField(default=0, db_index=True)
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lightness = models.FloatField(default=0, db_index=True)
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volume = models.FloatField(default=0, null=True, db_index=True)
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director = models.CharField(max_length=1000)
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title = models.CharField(max_length=1000)
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def update_calculated_values(self):
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self.duration = self.end - self.start
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if self.duration > 0:
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self.hue, self.saturation, self.lightness = extract.average_color(
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self.item.timeline_prefix, self.start, self.end)
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self.volume = extract.average_volume(self.item.timeline_prefix, self.start, self.end)
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else:
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self.hue = self.saturation = self.lightness = 0
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self.volume = 0
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self.director = self.item.sort.director
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self.title = self.item.sort.title
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def save(self, *args, **kwargs):
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self.public_id = u"%s/%s-%s" %(self.item.itemId, self.start, self.end)
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if self.duration != self.end - self.start:
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self.update_calculated_values()
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super(Clip, self).save(*args, **kwargs)
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def json(self, keys=None):
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j = {}
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clip_keys = ('id', 'in', 'out', 'position', 'created', 'modified',
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'hue', 'saturation', 'lightness', 'volume')
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for key in clip_keys:
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j[key] = getattr(self, {
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'id': 'public_id',
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'in': 'start',
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'out': 'end',
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'position': 'start',
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}.get(key, key))
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if keys:
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for key in j.keys():
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if key not in keys:
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del j[key]
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if 'videoRatio' in keys:
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streams = self.item.streams()
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if streams:
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j['videoRatio'] = streams[0].aspect_ratio
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public_layers = [l['id']
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for l in filter(lambda l: not l.get('private', False),
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settings.CONFIG['layers'])]
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if 'annotations' in keys:
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j['annotations'] = [a.json(keys=['value', 'id', 'layer'])
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for a in self.annotations.filter(layer__name__in=public_layers).select_related()]
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for layer in filter(lambda l: l in keys, public_layers):
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j[layer] = [a.json(keys=['id', 'value'])
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for a in self.annotations.filter(layer__name=layer)]
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for key in keys:
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if key not in clip_keys and key not in j:
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j[key] = self.item.get(key)
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return j
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@classmethod
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def get_or_create(cls, item, start, end):
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public_id = u"%s/%s-%s" %(item.itemId, start, end)
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qs = cls.objects.filter(public_id=public_id)
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if qs.count() == 0:
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clip = Clip(item=item, start=start, end=end, public_id=public_id)
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clips.save()
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created = True
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else:
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clip = qs[0]
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created = False
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return clip, created
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def __unicode__(self):
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return self.public_id
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