cablegates/pandora/item/timelines.py

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2011-08-20 17:53:26 +00:00
# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
from __future__ import division, with_statement
from glob import glob
import Image
def loadTimeline(timeline_prefix, height=64):
files = sorted(glob('%s.%s.*.png' % (timeline_prefix, height)))
f = Image.open(files[0])
width = f.size[0]
f = Image.open(files[-1])
duration = f.size[0] + (len(files)-1)*width
timeline = Image.new("RGB", (duration, height))
pos = 0
for f in files:
part = Image.open(f)
timeline.paste(part, (pos, 0, pos + part.size[0], height))
pos += part.size[0]
return timeline
def makeTiles(timeline_prefix, height=16, width=3600):
files = glob('%s.64.*.png' % timeline_prefix)
fps = 25
part_step = 60
output_width = width
width = len(files) * part_step
timeline = Image.new("RGB", (width, height))
pos = 0
for f in sorted(files):
part = Image.open(f)
part_width = int(part.size[0] / fps)
part = part.resize((part_width, height), Image.ANTIALIAS)
timeline.paste(part, (pos, 0, pos+part_width, height))
pos += part_width
timeline = timeline.crop((0, 0, pos, height))
pos = 0
i = 0
while pos < timeline.size[0]:
end = min(pos+output_width, timeline.size[0])
timeline.crop((pos, 0, end, timeline.size[1])).save('%s.%s.%04d.png' % (timeline_prefix, timeline.size[1], i))
pos += output_width
i += 1
def makeTimelineOverview(timeline_prefix, width, inpoint=0, outpoint=0, duration=-1, height=16):
input_scale = 25
timeline_file = '%s.%s.png' % (timeline_prefix, height)
if outpoint > 0:
timeline_file = '%s.overview.%s.%d-%d.png' % (timeline_prefix, height, inpoint, outpoint)
timeline = loadTimeline(timeline_prefix)
duration = timeline.size[0]
if inpoint<=0:
inpoint = 0
else:
inpoint = inpoint * input_scale
if outpoint<=0:
outpoint = duration
else:
outpoint = outpoint * input_scale
timeline = timeline.crop((inpoint, 0, outpoint, timeline.size[1])).resize((width, height), Image.ANTIALIAS)
timeline.save(timeline_file)
def join_timelines(timelines, prefix):
height = 64
width = 1500
tiles = []
for timeline in timelines:
tiles += sorted(glob('%s.%s.*.png'%(timeline, height)))
timeline = Image.new("RGB", (2 * width, height))
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pos = 0
i = 0
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for tile in tiles:
tile = Image.open(tile)
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timeline.paste(tile, (pos, 0, pos+tile.size[0], height))
pos += tile.size[0]
if pos >= width:
timeline_name = '%s.%s.%04d.png' % (prefix, height, i)
timeline.crop((0, 0, width, height)).save(timeline_name)
i += 1
if pos > width:
t = timeline.crop((width, 0, pos, height))
timeline.paste(t, (0, 0, t.size[0], height))
pos -= width
if pos:
timeline_name = '%s.%s.%04d.png' % (prefix, height, i)
timeline.crop((0, 0, pos, height)).save(timeline_name)
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makeTiles(prefix, 16, 3600)
makeTimelineOverview(prefix, 1920, height=16)
makeTimelineOverview(prefix, 1920, height=64)