add sequence backend
This commit is contained in:
j
parent
630dd61adb
commit
9b93c8ec2a
8 changed files with 465 additions and 7 deletions
0
pandora/sequence/__init__.py
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0
pandora/sequence/__init__.py
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79
pandora/sequence/extract.py
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79
pandora/sequence/extract.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division
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import Image
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import os
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ZONE_INDEX = []
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for pixel_index in range(64):
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x, y = pixel_index % 8, int(pixel_index / 8)
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ZONE_INDEX.append(int(x / 2) + int(y / 4) * 4)
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def get_hash(image, mode, debug=False):
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if mode == 'color':
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# divide the image into 8 zones:
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# 0 0 1 1 2 2 3 3
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# 0 0 1 1 2 2 3 3
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# 0 0 1 1 2 2 3 3
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# 0 0 1 1 2 2 3 3
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# 4 4 5 5 6 6 7 7
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# 4 4 5 5 6 6 7 7
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# 4 4 5 5 6 6 7 7
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# 4 4 5 5 6 6 7 7
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image_data = image.getdata()
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image_hash = 0
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zone_values = []
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for zone_index in range(8):
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zone_values.append([])
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for pixel_index, pixel_value in enumerate(image_data):
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zone_values[ZONE_INDEX[pixel_index]].append(pixel_value)
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for zone_index, pixel_values in enumerate(zone_values):
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# get the mean for each color channel
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mean = map(lambda x: int(round(sum(x) / 8)), zip(*pixel_values))
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# store the mean color of each zone as an 8-bit value:
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# RRRGGGBB
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color_index = sum((
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int(mean[0] / 32) << 5,
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int(mean[1] / 32) << 2,
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int(mean[2] / 64)
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))
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image_hash += color_index * pow(2, zone_index * 8)
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elif mode == 'shape':
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image_data = image.convert('L').getdata()
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image_mean = sum(image_data) / 64
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image_hash = 0
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for pixel_index, pixel_value in enumerate(image_data):
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if pixel_value > image_mean:
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image_hash += pow(2, pixel_index)
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#return hash as 16 character hex string
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h = hex(image_hash)[2:].upper()
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if h.endswith('L'): h = h[:-1]
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return '0' * (16-len(h)) + h
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def get_sequences(path):
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modes = ['color', 'shape']
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sequences = {}
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for mode in modes:
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sequences[mode] = []
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fps = 25
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position = 0
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file_names = filter(lambda x: 'timelinedata8p' in x, os.listdir(path))
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file_names = sorted(file_names, key=lambda x: int(x[14:-4]))
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file_names = map(lambda x: path + x, file_names)
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for file_name in file_names:
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timeline_image = Image.open(file_name)
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timeline_width = timeline_image.size[0]
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for x in range(0, timeline_width, 8):
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frame_image = timeline_image.crop((x, 0, x + 8, 8))
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for mode in modes:
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frame_hash = get_hash(frame_image, mode)
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if position == 0 or frame_hash != sequences[mode][-1]['hash']:
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if position > 0:
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sequences[mode][-1]['out'] = position
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sequences[mode].append({'in': position, 'hash': frame_hash})
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position += 1 / fps
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for mode in modes:
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if sequences[mode]:
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sequences[mode][-1]['out'] = position
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return sequences
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163
pandora/sequence/managers.py
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163
pandora/sequence/managers.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from django.db.models import Q, Manager
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from django.conf import settings
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from ox.django.query import QuerySet
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from item.utils import decode_id
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def parseCondition(condition, user):
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'''
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condition: {
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value: "war"
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}
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or
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condition: {
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key: "year",
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value: "1970-1980,
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operator: "!="
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}
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'''
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k = condition.get('key', 'name')
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k = {
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'id': 'public_id',
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'in': 'start',
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'out': 'end'
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}.get(k, k)
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if not k:
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k = 'name'
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v = condition['value']
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op = condition.get('operator')
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if not op:
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op = ''
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if op.startswith('!'):
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op = op[1:]
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exclude = True
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else:
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exclude = False
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if op == '-':
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q = parseCondition({'key': k, 'value': v[0], 'operator': '>='}, user) \
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& parseCondition({'key': k, 'value': v[1], 'operator': '<'}, user)
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if exclude:
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return ~q
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else:
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return q
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if (not exclude and op == '=' or op in ('$', '^', '>=', '<')) and v == '':
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return Q()
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if k.endswith('__id'):
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v = decode_id(v)
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if isinstance(v, bool): #featured and public flag
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key = k
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else:
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key = "%s%s" % (k, {
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'>': '__gt',
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'>=': '__gte',
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'<': '__lt',
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'<=': '__lte',
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'==': '__iexact',
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'=': '__icontains',
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'^': '__istartswith',
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'$': '__iendswith',
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}.get(op, '__icontains'))
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key = str(key)
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if exclude:
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q = ~Q(**{key: v})
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else:
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q = Q(**{key: v})
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return q
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def parseConditions(conditions, operator, user):
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'''
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conditions: [
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{
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value: "war"
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}
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{
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key: "year",
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value: "1970-1980,
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operator: "!="
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},
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{
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key: "country",
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value: "f",
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operator: "^"
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}
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],
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operator: "&"
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'''
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conn = []
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for condition in conditions:
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if 'conditions' in condition:
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q = parseConditions(condition['conditions'],
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condition.get('operator', '&'), user)
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if q:
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conn.append(q)
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pass
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else:
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conn.append(parseCondition(condition, user))
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if conn:
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q = conn[0]
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for c in conn[1:]:
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if operator == '|':
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q = q | c
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else:
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q = q & c
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return q
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return None
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class SequenceManager(Manager):
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def get_query_set(self):
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return QuerySet(self.model)
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def find(self, data, user):
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'''
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query: {
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conditions: [
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{
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value: "war"
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}
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{
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key: "year",
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value: "1970-1980,
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operator: "!="
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},
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{
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key: "country",
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value: "f",
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operator: "^"
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}
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],
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operator: "&"
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}
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'''
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#join query with operator
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qs = self.get_query_set()
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conditions = parseConditions(data.get('query', {}).get('conditions', []),
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data.get('query', {}).get('operator', '&'),
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user)
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if conditions:
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qs = qs.filter(conditions)
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#anonymous can only see public items
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if not user or user.is_anonymous():
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allowed_level = settings.CONFIG['capabilities']['canSeeItem']['guest']
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qs = qs.filter(sort__rightslevel__lte=allowed_level)
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#users can see public items, there own items and items of there groups
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else:
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allowed_level = settings.CONFIG['capabilities']['canSeeItem'][user.get_profile().get_level()]
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q = Q(sort__rightslevel__lte=allowed_level)|Q(user=user.id)
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if user.groups.count():
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q |= Q(item__groups__in=user.groups.all())
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qs = qs.filter(q)
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#admins can see all available items
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return qs
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56
pandora/sequence/models.py
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56
pandora/sequence/models.py
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# -*- 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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import re
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from django.db import models, transaction
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from django.contrib.auth.models import User, Group
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from django.db.models import Q
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from django.conf import settings
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import ox
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import managers
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from annotation.models import Annotation, get_matches, get_super_matches
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from item.models import Item, ItemSort
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from changelog.models import Changelog
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from django.db import models
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class Sequence(models.Model):
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public_id = models.CharField(max_length=128, unique=True)
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item = models.ForeignKey(Item, null=True, related_name='sequences')
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sort = models.ForeignKey(ItemSort, null=True, related_name='sequences')
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user = models.IntegerField(db_index=True, null=True)
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mode = models.CharField(max_length=255)
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hash = models.CharField(db_index=True, max_length=16, default='')
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start = models.FloatField(default=-1, db_index=True)
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end = models.FloatField(default=-1)
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objects = managers.SequenceManager()
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def save(self, *args, **kwargs):
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self.public_id = u"%s/%s/%s-%s" % (
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self.item.itemId, self.mode, float(self.start), float(self.end)
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)
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if self.item:
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self.user = self.item.user and self.item.user.id
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self.sort = self.item.sort
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super(Sequence, self).save(*args, **kwargs)
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def __unicode__(self):
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return self.public_id
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def json(self, keys=None, user=None):
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j = {
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'id': self.public_id,
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'hash': self.hash,
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'in': self.start,
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'out': self.end,
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}
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if keys:
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for key in keys:
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if key not in j:
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j[key] = self.item.json.get(key)
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return j
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31
pandora/sequence/tasks.py
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31
pandora/sequence/tasks.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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import os
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from datetime import timedelta, datetime
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import gzip
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import random
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random
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from django.conf import settings
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from django.db import connection, transaction
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from ox.utils import ET
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from celery.task import task, periodic_task
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import models
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import extract
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@task(ignore_results=True, queue='default')
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def get_sequences(itemId):
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i = models.Item.objects.get(itemId=itemId)
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models.Sequence.objects.filter(item=i).delete()
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data = extract.get_sequences(i.timeline_prefix)
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with transaction.commit_on_success():
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for mode in data:
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for seq in data[mode]:
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s = models.Sequence()
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s.item = i
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s.mode = mode
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s.start = seq['in']
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s.end = seq['out']
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s.hash = seq['hash']
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s.save()
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124
pandora/sequence/views.py
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124
pandora/sequence/views.py
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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
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from __future__ import division
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from django.conf import settings
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from ox.utils import json
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from ox.django.shortcuts import render_to_json_response, json_response
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from ox.django.api import actions
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from annotation.models import Annotation
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from item.models import Item
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from item import utils
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import models
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def parse_query(data, user):
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query = {}
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query['range'] = [0, 100]
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query['sort'] = [{'key':'in', 'operator':'+'}]
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for key in ('keys', 'group', 'range', 'sort', 'query'):
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if key in data:
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query[key] = data[key]
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query['qs'] = models.Sequence.objects.find(query, user)
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if 'itemsQuery' in data and data['itemsQuery'].get('conditions'):
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item_query = Item.objects.find({'query': data['itemsQuery']}, user)
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query['qs'] = query['qs'].filter(item__in=item_query)
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return query
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def order_query(qs, sort):
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order_by = []
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sort += [
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{'key': 'in', 'operator': '-'},
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]
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for e in sort:
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operator = e['operator']
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if operator != '-':
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operator = ''
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key = {
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'in': 'start',
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'out': 'end',
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}.get(e['key'], e['key'])
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if key not in ('start', 'end', 'mode', 'hash'):
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key = 'sort__%s' % key
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order = '%s%s' % (operator, key)
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order_by.append(order)
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if order_by:
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qs = qs.order_by(*order_by, nulls_last=True)
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return qs
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def findSequences(request):
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'''
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param data {
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query: ...
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itemsQuery: ...
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}
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return {
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'status': {'code': int, 'text': string}
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'data': {
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items = [{..}, {...}, ...]
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}
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}
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'''
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data = json.loads(request.POST['data'])
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response = json_response()
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query = parse_query(data, request.user)
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qs = query['qs']
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if 'keys' in data:
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qs = qs[query['range'][0]:query['range'][1]]
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response['data']['items'] = [p.json(data['keys'], request.user) for p in qs]
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elif 'position' in query:
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qs = order_query(qs, query['sort'])
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ids = [i['public_id'] for i in qs.values('public_id')]
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data['conditions'] = data['conditions'] + {
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'value': data['position'],
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'key': query['sort'][0]['key'],
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'operator': '^'
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}
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query = parse_query(data, request.user)
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qs = order_query(query['qs'], query['sort'])
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if qs.count() > 0:
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response['data']['position'] = utils.get_positions(ids, [qs[0].itemId])[0]
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elif 'positions' in data:
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qs = order_query(qs, query['sort'])
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ids = [i['public_id'] for i in qs.values('public_id')]
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response['data']['positions'] = utils.get_positions(ids, data['positions'])
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else:
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response['data']['items'] = qs.count()
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return render_to_json_response(response)
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actions.register(findSequences)
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def getSequence(request):
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'''
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param data {
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id
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mode
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position
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}
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return {
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'status': {'code': int, 'text': string}
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'data': {
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id
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mode
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in
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out
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}
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}
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'''
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data = json.loads(request.POST['data'])
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response = json_response()
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qs = models.Sequence.objects.filter(
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item__itemId=data['id'],
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mode=data['mode'],
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start__lte=data['position'],
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end__gt=data['position']
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).order_by('start', 'end')
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for sequence in qs:
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response['data'] = sequence.json()
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break
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return render_to_json_response(response)
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actions.register(getSequence)
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@ -109,6 +109,7 @@ INSTALLED_APPS = (
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'annotation',
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'clip',
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'sequence',
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'archive',
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'event',
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'changelog',
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@ -25,7 +25,7 @@ pandora.ui.sequencesDialog = function(id, position) {
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pandora.api.getSequence({id: id, mode: mode, position: position}, function(result) {
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// result.data: {hash, in, out}
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var fixedRatio = 16/9,
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hash = result.data.hash;
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hash = result.data.hash,
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$sidebar = Ox.Element(), // add video player
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$list = Ox.IconList({
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fixedRatio: fixedRatio,
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@ -45,7 +45,10 @@ pandora.ui.sequencesDialog = function(id, position) {
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items: function(data, callback) {
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pandora.api.findSequences(Ox.extend(data, {
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query: {
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conditions: [{key: mode, value: hash, operator: '=='}],
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conditions: [
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{key: 'mode', value: mode, operator: '=='},
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{key: 'hash', value: hash, operator: '=='}
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],
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||||
operator: '&'
|
||||
}
|
||||
}), callback);
|
||||
|
|
@ -68,13 +71,14 @@ pandora.ui.sequencesDialog = function(id, position) {
|
|||
// ...
|
||||
}
|
||||
});
|
||||
$splitPanel.replaceElements([$sidebar, $list]);
|
||||
$splitPanel.replaceElement(0, $sidebar);
|
||||
$splitPanel.replaceElement(1, $list);
|
||||
});
|
||||
return $splitPanel;
|
||||
},
|
||||
tabs: [
|
||||
{id: 'shapes', title: 'Similar Shapes'},
|
||||
{id: 'colors', title: 'Similar Colors'}
|
||||
{id: 'shape', title: 'Similar Shapes'},
|
||||
{id: 'color', title: 'Similar Colors'}
|
||||
]
|
||||
}),
|
||||
|
||||
|
|
@ -85,7 +89,7 @@ pandora.ui.sequencesDialog = function(id, position) {
|
|||
title: 'Close'
|
||||
}).bindEvent({
|
||||
click: function() {
|
||||
$dialog.close;
|
||||
$dialog.close();
|
||||
}
|
||||
})
|
||||
],
|
||||
|
|
@ -102,4 +106,4 @@ pandora.ui.sequencesDialog = function(id, position) {
|
|||
|
||||
return $dialog;
|
||||
|
||||
};
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in a new issue