Webcam.py :  » Network » emesene » emesene-1.6.2 » Python Open Source

Home
Python Open Source
1.3.1.2 Python
2.Ajax
3.Aspect Oriented
4.Blog
5.Build
6.Business Application
7.Chart Report
8.Content Management Systems
9.Cryptographic
10.Database
11.Development
12.Editor
13.Email
14.ERP
15.Game 2D 3D
16.GIS
17.GUI
18.IDE
19.Installer
20.IRC
21.Issue Tracker
22.Language Interface
23.Log
24.Math
25.Media Sound Audio
26.Mobile
27.Network
28.Parser
29.PDF
30.Project Management
31.RSS
32.Search
33.Security
34.Template Engines
35.Test
36.UML
37.USB Serial
38.Web Frameworks
39.Web Server
40.Web Services
41.Web Unit
42.Wiki
43.Windows
44.XML
Python Open Source » Network » emesene 
emesene » emesene 1.6.2 » Webcam.py
# -*- coding: utf-8 -*-

#   This file is part of emesene.
#
#    Emesene is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    emesene 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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with emesene; if not, write to the Free Software
#    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

# TODO: handle "cancel webcam" p2p messages
#       port to farsight and stop the pain

import os
import time
import gtk
import gobject

import emesenelib.common
import desktop

HAVE_MIMIC = 1
try:
    import libmimic
except:
    print "Libmimic not found, webcam not available"
    print "Try to compile it with 'python setup.py build_ext -i' (python-dev package required)"
    HAVE_MIMIC = 0

HAVE_WEBCAM = 1
try:
    import WebcamDevice
except Exception, e:
    HAVE_WEBCAM = 0
    print "Can't initialize webcam device, sending disabled!"
    print "Reason:", str(e)

class Webcam:
    ''' this class represents a webcam session'''
    
    def __init__(self, p2p, conversation, session, sender, ourwebcam, controller):
        '''Constructor'''
        if not HAVE_WEBCAM:
            self.NO_WEBCAM = True
            return
        self.NO_WEBCAM = False
        self.p2p = p2p
        self.conversation = conversation
        self.session = int(session)
        self.sender = sender
        self.ourwebcam = ourwebcam
        self.controller=controller
        
        self.signals = []
        sap = self.signals.append
        sap(self.p2p.connect('webcam-frame-received', self.on_webcam_frame))
        sap(self.p2p.connect('webcam-failed', self.on_webcam_failed))
        sap(self.p2p.connect('webcam-ack', self.on_accept))
        
        self.decoder = libmimic.new_decoder()
        self.encoder = libmimic.new_encoder(1) # 1 = hi-res, 0 = low res
        
        self.init = False
        self.webcam = None
        self.errors = 0
        self.image = None
        self.win = None
        self.win_send = None
        self.daarea = None
        
    def prepare_window(self):
        if self.win is not None:
            return
        self.image = gtk.Image()
        self.win = gtk.Window()
        self.win.set_double_buffered(False)
        self.win.set_app_paintable(True)
        self.win.set_opacity(1)
        #self.win.set_resizable(False)
        self.win.set_title(_("%s\'s webcam") % self.sender);
        self.win.add(self.image)
        self.win.show_all()
        self.win.resize(320, 240)
        self.signals.append(self.win.connect('delete-event', self.on_close))
        
    def prepare_send_window(self):
        if self.win_send is not None:
            return
        self.daarea = gtk.DrawingArea()
        self.daarea.set_colormap(gtk.gdk.colormap_get_system())
        self.win_send = gtk.Window()
        self.win_send.set_opacity(1)
        self.win_send.set_double_buffered(False)
        self.win_send.set_app_paintable(True)
        #self.win_send.set_resizable(False)
        self.win_send.set_title(_("Your webcam"));
        self.win_send.add(self.daarea)
        self.win_send.show_all()
        self.win_send.resize(320, 240)
        self.signals.append(self.win_send.connect('delete-event', self.on_close))
        
    def on_close(self, *args):
        self.conversation.appendOutputText(None, _('You have canceled the webcam session'), 'information')
        self.p2p.emit('webcam-canceled', self.session)
        if self.webcam is not None:
            self.webcam.stop()
            
    def on_webcam_failed(self, p2p, session, reason):
        if int(session) != self.session:
            return
            
        self.conversation.appendOutputText(None, _('Webcam canceled'), 'error')
        if self.webcam is not None:
            self.webcam.stop()
            self.webcam = None
    
    def on_webcam_frame(self, p2p, session, sender, frame):
        if int(session) != self.session:
            return
        if self.win is None:
            return
        try:
            width, height, data = libmimic.decode(self.decoder, frame)
            if self.errors > 0:
                self.errors = 0
            #print "self.errors: %d\n" % self.errors
        except:
            print "Decode error"
            self.errors += 1
            print "self.errors: %d\n" % self.errors
            if self.errors > 10:
                print "Too many errors, closing webcam"
                self.on_close()
            return
            
        if not self.init:
            print "Got first frame: %dx%d" % (width, height)
            self.win.set_size_request(width, height)
            self.win.show_all()
            self.init = True
        
        self.image.set_from_pixbuf(gtk.gdk.pixbuf_new_from_data(data,gtk.gdk.COLORSPACE_RGB,False,8,width,height,width*3))
        if self.win is not None:
            self.win.queue_draw()
            self.image.queue_draw()
    
    def decline(self , session):
        if int(session) != self.session:
            return
        self.p2p.emit('webcam-canceled',self.session)

    def accept(self, session):
        if int(session) != self.session:
            return
        
        self.prepare_window()
        self.p2p.emit('webcam-accepted', self.session, self.sender)
        
    def on_handoff(self, element, buffer, pad):
        try:
            frame, width, height = libmimic.encode(self.encoder, buffer.data)
            self.p2p.emit('webcam-frame-ready', self.session, frame, width, height)
        except Exception, e:
            print "Encode error", e
            print "Exception: ", type(e)
        return True

    def on_accept(self, p2puser, session):
        if int(session) != self.session:
            return
        
        if not HAVE_WEBCAM:
            self.conversation.appendOutputText(None, _('Your webcam is not supported, or you don\'t have one'), 'error')
            return
        self.prepare_send_window()
        self.webcam = WebcamDevice.WebcamDevice(self.on_handoff, self.daarea.window.xid, self.controller)
    


www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.