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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# libavg - Media Playback Engine.
# Copyright (C) 2003-2014 Ulrich von Zadow
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# Current versions can be found at www.libavg.de
from libavg import avg, app, widget
from libavg import parsecamargs
GUI_SIZE=(300, 526)
class FXSlider(avg.DivNode):
def __init__(self, row, min, max, fxNode, fxAttrName, caption, isInt, parent=None,
**kwargs):
super(FXSlider, self).__init__(**kwargs)
if parent:
parent.appendChild(self)
avg.RectNode(pos=(0,8), size=(280,38), color="808080", strokewidth=2, parent=self)
textBgRect = avg.RectNode(pos=(8,2), fillcolor="000000", fillopacity=1,
strokewidth=0, parent=self)
caption = avg.WordsNode(pos=(10,0), text=caption, parent=self)
textBgRect.size = caption.getMediaSize() + (4,2)
self.__words = avg.WordsNode(pos=(240,23), parent=self)
self.__slider = widget.Slider(width=220, range=(min,max), pos=(15,20), parent=self)
self.__slider.subscribe(self.__slider.THUMB_POS_CHANGED, self.__onSliderMove)
self.pos = (0, row*46)
self.__fxNode = fxNode
self.__fxAttrName = fxAttrName
self.__caption = caption
self.__isInt = isInt
self.__slider.thumbPos = getattr(self.__fxNode, fxAttrName)
self.__onSliderMove(self.__slider.thumbPos)
def __onSliderMove(self, thumbPos):
if self.__isInt:
setattr(self.__fxNode, self.__fxAttrName, int(thumbPos))
self.__words.text = "%i"%thumbPos
else:
setattr(self.__fxNode, self.__fxAttrName, thumbPos)
self.__words.text = "%.2f"%thumbPos
def colorToString(colorTuple):
s = "%02X%02X%02X"%colorTuple[:-1]
return s
class Chromakey(app.MainDiv):
def onArgvParserCreated(self, parser):
parser.set_usage(usage)
parsecamargs.addOptions(parser)
def onArgvParsed(self, options, args, parser):
if options.driver is None:
parser.print_help()
print
print "ERROR: at least '--driver' must be specified"
exit(1)
self.__optWidth = options.width
self.__optHeight = options.height
self.__optsCam = {
"driver": options.driver,
"device": options.device,
"unit": options.unit,
"fw800": options.fw800,
"pixelformat": options.pixelFormat,
"framerate": options.framerate}
self.settings.set("app_resolution", "%dx%d"
%(GUI_SIZE[0]+options.width, max(GUI_SIZE[1], options.height)))
def onInit(self):
avg.RectNode(size=(self.__optWidth,self.__optHeight), fillcolor="FF0000",
fillopacity=1, strokewidth=0, parent=self)
self.__camNode = avg.CameraNode(
capturewidth=self.__optWidth, captureheight=self.__optHeight,
width=self.__optWidth, height=self.__optHeight, parent=self,
**self.__optsCam)
self.__camNode.play()
self.__filter = avg.ChromaKeyFXNode()
self.__camNode.setEffect(self.__filter)
self.__filter.color = "0000FF"
self.__filter.htolerance = 0.05
self.__filter.stolerance = 1.0
self.__filter.ltolerance = 1.0
self.__filter.softness = 0.0
self.__createGUI()
def __createGUI(self):
self.__guiDiv = avg.DivNode(pos=(self.__optWidth+10,10), parent=self)
self.__colorWords = avg.WordsNode(pos=(0,14), parent=self.__guiDiv)
self.__colorWords.text = "Key Color: "+self.__filter.color
self.__colorRect = avg.RectNode(pos=(200,12), size=(20, 20),
fillcolor=self.__filter.color, fillopacity=1,
color="FFFFFF", parent=self.__guiDiv)
self.__camNode.subscribe(avg.Node.CURSOR_DOWN, self.__onColorDown)
FXSlider(1, 0.0, 1.0, self.__filter, "htolerance", "Hue Tolerance",
False, parent=self.__guiDiv)
FXSlider(2, 0.0, 1.0, self.__filter, "stolerance", "Saturation Tolerance",
False, parent=self.__guiDiv)
FXSlider(3, 0.0, 1.0, self.__filter, "ltolerance", "Lightness Tolerance",
False, parent=self.__guiDiv)
FXSlider(4, 0.0, 1.0, self.__filter, "softness", "Softness",
False, parent=self.__guiDiv)
FXSlider(5, 0, 8, self.__filter, "erosion", "Erosion",
True, parent=self.__guiDiv)
FXSlider(6, 0.0, 1.0, self.__filter, "spillthreshold", "Spill Suppression",
False, parent=self.__guiDiv)
button = widget.TextButton(pos=(0,332), text="Whitebalance", size=(100,22),
parent=self.__guiDiv)
button.subscribe(button.CLICKED, self.__onWhitebalance)
button = widget.TextButton(pos=(110,332), text="Dump Config", size=(100,22),
parent=self.__guiDiv)
button.subscribe(button.CLICKED, self.__dumpConfig)
FXSlider(9, 0, 500, self.__camNode, "shutter", "Shutter",
True, parent=self.__guiDiv)
FXSlider(10, 128, 1023, self.__camNode, "gain", "Gain",
True, parent=self.__guiDiv)
def __onColorDown(self, event):
pos = self.__camNode.getRelPos(event.pos)
bmp = self.__camNode.getBitmap()
color = bmp.getPixel(pos)
colorString = colorToString(color)
self.__filter.color = colorString
self.__colorWords.text = "Key Color: "+colorString
self.__colorRect.fillcolor = colorString
def __onWhitebalance(self):
self.__camNode.setWhitebalance(
self.__camNode.getWhitebalanceU(), self.__camNode.getWhitebalanceV())
self.__camNode.doOneShotWhitebalance()
def __dumpConfig(self):
print "Camera:"
print " device=", self.__camNode.device
print " shutter=", self.__camNode.shutter
print " gain=", self.__camNode.gain
print " White Balance: (u=", self.__camNode.getWhitebalanceU(), ", v=", \
self.__camNode.getWhitebalanceV()
print "Chromakey:"
print " color=", self.__filter.color
print " htolerance=", self.__filter.htolerance
print " stolerance=", self.__filter.stolerance
print " ltolerance=", self.__filter.ltolerance
print " softness=", self.__filter.softness
print " erosion=", self.__filter.erosion
print " spillthreshold=", self.__filter.spillthreshold
usage = """%prog [options]
avg_chromakey.py is a configuration utility for the libavg chromakey filter.
The chromakey filter allows implementation of green- or bluescreens with
libavg.
This utility shows a camera image with chromakey applied to it and allows the
user to adjust the camera and filter parameters. The parameters can be dumped
to the console for easy inclusion in libavg scripts.
"""
if __name__ == "__main__":
app.App().run(Chromakey())
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