448 lines
12 KiB
Python
Executable file
448 lines
12 KiB
Python
Executable file
#!/usr/bin/python
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# -*- coding: UTF-8 -*-
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import sys
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import glob
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import os
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import re
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import math
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import shutil
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import errno
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import unicodedata
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import urllib2
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#import xml.etree.ElementTree as etree
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from lxml import etree
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from xml.sax.saxutils import escape as xmlescape
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import cssutils
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import logging
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import textwrap
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import tempfile
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import threading
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import multiprocessing
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from threading import Thread, Lock
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from Queue import Queue
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# Frames per second. Increasing this renders more frames, the avconf-statements would still need modifications
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fps = 25
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# using --debug skips the threading, the network fetching of the schedule and
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# just renders one type of video
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debug = ('--debug' in sys.argv)
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# using --offline only skips the network fetching and use a local schedule.de.xml
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offline = ('--offline' in sys.argv)
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# set charset of output-terminal
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reload(sys)
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sys.setdefaultencoding('utf-8')
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# t: current time, b: begInnIng value, c: change In value, d: duration
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# copied from jqueryui
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def easeOutCubic(t, b, c, d):
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t=float(t)/d-1
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return c*((t)*t*t + 1) + b
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def easeInCubic(t, b, c, d):
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t=float(t)/d
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return c*(t)*t*t + b;
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def easeOutQuad(t, b, c, d):
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t=float(t)/d
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return -c *(t)*(t-2) + b;
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# try to create all folders needed and skip, they already exist
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def ensurePathExists(path):
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try:
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os.makedirs(path)
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except OSError as exception:
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if exception.errno != errno.EEXIST:
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raise
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# remove the files matched by the pattern
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def ensureFilesRemoved(pattern):
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for f in glob.glob(pattern):
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os.unlink(f)
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# Normalizes string, converts to lowercase, removes non-alpha characters,
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#and converts spaces to hyphens.
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def slugify(value):
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value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore')
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value = unicode(re.sub('[^\w\s-]', '', value).strip().lower())
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value = unicode(re.sub('[-\s]+', '-', value))
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return value
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# create a filename from the events' id and a slugified version of the title
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def vorspannFilename(id, title):
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return u'{0:04d}-{1}.dv'.format(id, slugify(unicode(title)))
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# svg does not have a method for automatic line breaking, that rsvg is capable of
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# so we do it in python as good as we can
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def vorspannTitle(title):
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return '</tspan><tspan x="120" dy="35">'.join(textwrap.wrap(title, 50))
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def vorspannUrl(id):
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return 'fossgis.de/konferenz/2014/programm/events/'+str(id)+'.de.html'
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def abspannFrames():
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# 5 Sekunden
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# 2 Sekunden Fadein Lizenz
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frames = 2*fps
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for i in range(0, frames):
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yield (
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('lizenz','style', 'opacity', "%.4f" % easeInCubic(i, 0, 1, frames)),
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)
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# 3 Sekunden stehenlassen
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frames = 3*fps
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for i in range(0, frames):
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yield (
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('lizenz','style', 'opacity', 1),
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)
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def vorspannFrames():
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# 5 Sekunden
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# 1 Sekunde Title Fadein
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frames = 1*fps
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for i in range(0, frames):
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yield (
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('title', 'style', 'opacity', "%.4f" % easeInCubic(i, 0, 1, frames)),
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('text', 'style', 'opacity', 0),
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('lizenz','style', 'opacity', 0),
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)
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# 2 Sekunde Text Fadein
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frames = 2*fps
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for i in range(0, frames):
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yield (
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('title', 'style', 'opacity', 1),
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('text', 'style', 'opacity', "%.4f" % easeInCubic(i, 0, 1, frames)),
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('lizenz','style', 'opacity', 0),
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)
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# 1 Sekunde Lizenz Fadein
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frames = 1*fps
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for i in range(0, frames):
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yield (
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('title', 'style', 'opacity', 1),
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('text', 'style', 'opacity', 1),
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('lizenz','style', 'opacity', "%.4f" % easeInCubic(i, 0, 1, frames)),
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)
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# 1 Sekunde stehen bleiben
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frames = 1*fps
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for i in range(0, frames):
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yield (
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('title', 'style', 'opacity', 1),
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('text', 'style', 'opacity', 1),
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('lizenz','style', 'opacity', 1),
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)
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def pauseFrames():
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# 7 Sekunden
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# 3 Sekunde Text FadeIn
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frames = 3*fps
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for i in range(0, frames):
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yield (
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('text','style', 'opacity', "%.4f" % easeInCubic(i, 0, 1, frames)),
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)
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# 3 Sekunde Text FadeOut
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frames = 3*fps
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for i in range(0, frames):
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yield (
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('text','style', 'opacity', "%.4f" % easeInCubic(i, 1, -1, frames)),
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)
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# 1 Sekunde stehen lassen
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frames = 1*fps
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for i in range(0, frames):
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yield (
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('text','style', 'opacity', 0),
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)
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cssutils.ser.prefs.lineSeparator = ' '
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cssutils.log.setLevel(logging.ERROR)
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def render(infile, outfile, sequence, parameters={}, workdir='artwork'):
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# in debug mode we have no thread-worker which prints its progress
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if debug:
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print "generating {0} from {1}".format(outfile, infile)
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# make sure a .frames-directory exists in out workdir
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ensurePathExists(os.path.join(workdir, '.frames'))
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# open and parse the input file
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with open(os.path.join(workdir, infile), 'r') as fp:
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svgstr = fp.read()
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for key in parameters.keys():
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svgstr = svgstr.replace(key, xmlescape(str(parameters[key])))
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svg = etree.fromstring(svgstr)
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# find all images and force them to absolute file-urls
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namespaces = {'xlink': 'http://www.w3.org/1999/xlink', 'svg': 'http://www.w3.org/2000/svg'}
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for el in svg.findall(".//svg:image[@xlink:href]", namespaces=namespaces):
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el.attrib['{http://www.w3.org/1999/xlink}href'] = 'file:///' + os.path.realpath(workdir) + '/' + el.attrib['{http://www.w3.org/1999/xlink}href']
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# frame-number counter
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frameNr = 0
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# iterate through the animation seqence frame by frame
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# frame is a ... tbd
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for frame in sequence():
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# print a line for each and every frame generated
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if debug:
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print "frameNr {0:2d} => {1}".format(frameNr, frame)
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# open the output-file (named ".gen.svg" in the workdir)
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with open(os.path.join(workdir, '.gen.svg'), 'w') as fp:
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# apply the replace-pairs to the input text, by finding the specified xml-elements by thier id and modify thier css-parameter the correct value
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for replaceinfo in frame:
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(id, type, key, value) = replaceinfo
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for el in svg.findall(".//*[@id='"+id.replace("'", "\\'")+"']"):
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if type == 'style':
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style = cssutils.parseStyle( el.attrib['style'] if 'style' in el.attrib else '' )
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style[key] = unicode(value)
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el.attrib['style'] = style.cssText
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elif type == 'attr':
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el.attrib[key] = value
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# write the generated svg-text into the output-file
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fp.write( etree.tostring(svg) )
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# invoke inkscape to convert the generated svg-file into a png inside the .frames-directory
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os.system('cd {0} && inkscape --export-png=.frames/{1:04d}.png .gen.svg >/dev/null 2>&1'.format(workdir, frameNr))
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# incrwement frame-number
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frameNr += 1
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# remove the dv we are about to (re-)generate
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ensureFilesRemoved(os.path.join(workdir, outfile))
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# invoke avconv aka ffmpeg and renerate a lossles-dv from the frames
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# if we're not in debug-mode, suppress all output
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os.system('cd {0} && avconv -ar 48000 -ac 2 -f s16le -i /dev/zero -f image2 -i .frames/%04d.png -target pal-dv -aspect 16:9 -shortest "{1}"'.format(workdir, outfile) + ('' if debug else '>/dev/null 2>&1'))
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# as before, in non-debug-mode the thread-worker does all progress messages
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if debug:
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print "cleanup"
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# remove the .frames-dir with all frames in it
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shutil.rmtree(os.path.join(workdir, '.frames'))
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# remove the generated svg
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ensureFilesRemoved(os.path.join(workdir, '.gen.svg'))
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# Download the Events-Schedule and parse all Events out of it. Yield a tupel for each Event
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def events():
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print "downloading pentabarf schedule"
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# use --offline to skip networking
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if offline:
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# parse the offline-version
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schedule = etree.parse('schedule.de.xml').getroot()
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else:
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# download the schedule
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response = urllib2.urlopen('http://eh14.easterhegg.eu/pages/fahrplan/schedule.xml')
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# read xml-source
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xml = response.read()
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# parse into ElementTree
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schedule = etree.fromstring(xml)
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# iterate all days
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for day in schedule.iter('day'):
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# iterate all rooms
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for room in day.iter('room'):
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# iterate events on that day in this room
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for event in room.iter('event'):
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# aggregate names of the persons holding this talk
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personnames = []
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for person in event.find('persons').iter('person'):
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personnames.append(person.text)
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# yield a tupel with the event-id, event-title and person-names
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yield ( int(event.get('id')), event.find('title').text, event.find('subtitle').text or '', ', '.join(personnames) )
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# debug-mode selected by --debug switch
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if debug:
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print "!!! DEBUG MODE !!!"
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title = 'Sleep? Ain\'t nobody got time for that!'
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subtitle = 'Physiologie von Schlaf und Wachzustand'
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render(
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'vorspann.svg',
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os.path.join('..', str(5725)+".dv"),
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vorspannFrames,
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{
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'$id': 5725,
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'$title': title,
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'$subtitle': subtitle,
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'$personnames': 'Christina'
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}
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)
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# render(
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# 'abspann.svg',
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# '../outro.dv',
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# abspannFrames
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# )
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render('pause.svg',
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'../pause.dv',
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pauseFrames
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)
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sys.exit(0)
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# threaded task queue
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tasks = Queue()
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# for too long titles ;)
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titlemap = {
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#708: "Neue WEB-Anwendungen des LGRB Baden-Württemberg im Überblick"
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}
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# iterate over all events extracted from the schedule xml-export
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for (id, title, subtitle, personnames) in events():
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if id in titlemap:
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title = titlemap[id]
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# generate a task description and put them into the queue
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tasks.put((
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'vorspann.svg',
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str(id)+".dv",
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vorspannFrames,
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{
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'$id': id,
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'$title': title,
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'$subtitle': subtitle,
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'$personnames': personnames
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}
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))
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# place a task for the outro into the queue
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tasks.put((
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'abspann.svg',
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'outro.dv',
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abspannFrames
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))
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# place the pause-sequence into the queue
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tasks.put((
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'pause.svg',
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'pause.dv',
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pauseFrames
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))
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# one working thread per cpu
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num_worker_threads = multiprocessing.cpu_count()
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print "{0} tasks in queue, starting {1} worker threads".format(tasks.qsize(), num_worker_threads)
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# put a sentinel for each thread into the queue to signal the end
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for _ in range(num_worker_threads):
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tasks.put(None)
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# this lock ensures, that only one thread at a time is writing to stdout
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# and avoids output from multiple threads intermixing
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printLock = Lock()
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def tprint(str):
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# aquire lock
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printLock.acquire()
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# print thread-name and message
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print threading.current_thread().name+': '+str
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# release lock
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printLock.release()
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# thread worker
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def worker():
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# generate a tempdir for this worker-thread and use the artwork-subdir as temporary folder
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tempdir = tempfile.mkdtemp()
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workdir = os.path.join(tempdir, 'artwork')
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# save the current working dir as output-dir
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outdir = os.getcwd()
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# print a message that we're about to initialize our environment
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tprint("initializing worker in {0}, writing result to {1}".format(tempdir, outdir))
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# copy the artwork-dir into the tempdir
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shutil.copytree('artwork', workdir)
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# loop until all tasks are done (when the thread fetches a sentinal from the queue)
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while True:
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# fetch a task from the queue
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task = tasks.get()
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# if it is a stop-sentinal break out of the loop
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if task == None:
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break
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# print that we're about to render a task
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tprint('rendering {0}'.format(task[1]))
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# render options
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opts = (
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# argument 0 is the input file. prepend the workdir
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os.path.join(workdir, task[0]),
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# argument 1 is the output file. prepend the outdir
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os.path.join(outdir, task[1]),
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# argument 2 is the frame generator, nothing to do here
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task[2],
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# argument 3 are the extra parameters
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task[3] if len(task) > 3 else {},
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# argument 4 is the workdir path
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workdir
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)
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# render with these arguments
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render(*opts)
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# print that we're finished
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tprint('finished {0}, {1} tasks left'.format(task[1], max(0, tasks.qsize() - num_worker_threads)))
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# mark the task as finished
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tasks.task_done()
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# all tasks from the queue done, clean up
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tprint("cleaning up worker")
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# remove the tempdir
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shutil.rmtree(tempdir)
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# mark the sentinal as done
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tasks.task_done()
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# generate and start the threads
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for i in range(num_worker_threads):
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t = Thread(target=worker)
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t.daemon = True
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t.start()
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# wait until they finished doing the work
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tasks.join()
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print "all worker threads ended"
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