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# -*- coding: utf-8 -*-
# Copyright 2012 Ariel Calzada - ariel@activitycentral.com
#
# This program 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.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
import subprocess
import os
import gobject
import signal
import popen2
import fcntl
import re
import signal
class ScreencastProcess(gobject.GObject):
""" Process handler
"""
# Attributes
_args = None
_childprocess = None
_childpid = None
_childtimer = None
_encodingtimer = None
_encodingstream = None
_encodingpid = None
# Custom signals
__gsignals__ = {
'encode-start': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ()),
'encode-finished': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, ()),
'update-statusbar': (gobject.SIGNAL_RUN_FIRST, gobject.TYPE_NONE, (gobject.TYPE_STRING,gobject.TYPE_FLOAT,)),
}
def __init__(self):
""" Constructor
"""
super(ScreencastProcess, self).__init__()
self._args = []
self._ch_err = ""
def runProcess(self, q, s, fp):
""" Run program
"""
self._ch_err = ""
# cmd
programName = "recordmydesktop"
fname = "/usr/bin/" + programName
if not os.path.isfile(fname):
fname = "./" + programName
self._args.append ( fname )
# Output file
self._args.append ( "-o" )
self._args.append ( fp )
# FPS - Framerate
self._args.append ( "--fps" )
self._args.append ( "15" )
self._args.append ( "--quick-subsampling" )
self._args.append ( "--no-frame" )
# Overwrite
self._args.append("--overwrite")
# Quality
# Low
if str(q) == "2":
self._args.append("-v_quality")
self._args.append("0")
# Medium
elif str(q) == "1":
self._args.append("-v_quality")
self._args.append("10")
# High
elif str(q) == "0":
self._args.append("-v_quality")
#self._args.append("31")
self._args.append("20")
# Sound
if not s:
self._args.append("--no-sound")
# Start program
self._childprocess = popen2.Popen3 ( self._args, "t", 0 )
flags = fcntl.fcntl(self._childprocess.childerr, fcntl.F_GETFL)
fcntl.fcntl(self._childprocess.childerr, fcntl.F_SETFL, flags | os.O_NONBLOCK)
self._childpid = self._childprocess.pid
# Check process every second
self._childtimer = gobject.timeout_add (1000, self.checkProcessStatus)
def checkProcessStatus(self):
""" Check the current status of the process
"""
# Not running
if self._childpid == None:
return False
"""
os.waitpid(pid, options)
On Unix: Wait for completion of a child process given by process
id pid, and return a tuple containing its process id and exit
status indication (encoded as for wait()). The semantics of the
call are affected by the value of the integer options, which
should be 0 for normal operation.
If pid is greater than 0, waitpid() requests status information
for that specific process. If pid is 0, the request is for the
status of any child in the process group of the current process.
If pid is -1, the request pertains to any child of the current
process. If pid is less than -1, status is requested for any
process in the process group -pid (the absolute value of pid).
An OSError is raised with the value of errno when the syscall
returns -1.
----------------------------------------------------------------
os.WNOHANG
The option for waitpid() to return immediately if no child
process status is available immediately. The function returns
(0, 0) in this case.
"""
# Get process status
process_status = os.waitpid ( self._childpid, os.WNOHANG )
process_status_id = process_status [ 0 ]
# Not running
if process_status_id != 0:
self._childpid = None
return False
return True
def monitorEncoding(self):
""" Monitor encoding
"""
strstdout = ""
try:
strstdout = self._encodingstream.read()
if strstdout == "":
self.emit('encode-finished')
return False
except:
return True
try:
percentage = float ( strstdout.replace("[","").replace("%] ","") )
except:
percentage = 0.0
if percentage > 100.0:
percentage = 100.0
percentage_raw = percentage
percentage = "%.2f%%" % ( percentage )
self.emit('update-statusbar',percentage, percentage_raw)
return True
def stopProcess(self):
""" Stop process
"""
# Stop timer
if self._childtimer != None:
gobject.source_remove(self._childtimer)
self._childtimer = None
# Get process status
process_status = os.waitpid ( self._childpid, os.WNOHANG )
process_status_id = process_status [ 0 ]
# Running
if process_status_id == 0:
# Start encoding
os.kill(self._childpid, signal.SIGTERM)
# Monitor encoding
self.emit('encode-start')
self._encodingstream = self._childprocess.fromchild
self._encodingpid = self._childpid
flags = fcntl.fcntl(self._encodingstream, fcntl.F_GETFL)
fcntl.fcntl(self._encodingstream, fcntl.F_SETFL, flags | os.O_NONBLOCK)
self._encodingtimer = gobject.timeout_add ( 100, self.monitorEncoding )
self._childpid = None
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