#! /usr/bin/env python

'''
/****************************************************************************

Copyright 2007 Virginia Polytechnic Institute and State University

This file is part of the OSSIE USRP_Commander_GUI.

OSSIE USRP_Commander_GUI 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.

OSSIE USRP_Commander_GUI 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 OSSIE USRP_Commander_GUI; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

****************************************************************************/

'''

#!/usr/bin/env python
import threading

class WorkClass:
    """This class provides a place for the main processing of the 
    component to reside."""

    def __init__(self, rc2007_gui_ref):
        '''Initialization.  Sets a reference to parent.  
        Initializes the buffer.  Starts the Process data
        thread, which waits for data to be added to the buffer'''

        self.rc2007_gui_ref = rc2007_gui_ref
	
        self.voice_data_queue = []
        self.voice_data_queue_lock = threading.Lock()
        self.voice_data_signal = threading.Event()

        self.is_running = True

        self.process_thread = threading.Thread(target=self.Process)
        self.process_thread.start()
	
    def __del__(self):
        '''Destructor'''
        pass
	
    def AddVoiceData(self, data):
        '''Generally called by parent.  Adds data to a buffer.
        The Process() method will wait for this buffer to be set.
        '''
        self.voice_data_queue_lock.acquire()
        self.voice_data_queue.insert(0, data)
        self.voice_data_queue_lock.release()
        self.voice_data_signal.set()
    
    def SendTextData(self,data)
        # TODO: pack/depack
        # add meta data
        self.rc2007_gui_ref_outPort0_servant.send_data(data)
	
    def Release(self):
        self.is_running = False
        self.data_signal.set()
		
    def Process(self):
        while self.is_running:
            self.data_signal.wait()  # wait for data to be aded to the 
                                     # buffer in self.AddVoiceData()
            while len(self.data_queue) > 0:
                # get the data from the buffer:
                self.data_queue_lock.acquire()
                new_data = self.data_queue.pop()
                self.data_queue_lock.release()
				
                # forwarding voice data:
	        if self.rc2007_gui_ref.talk_flag:
                    if self.rc2007_gui_ref.outPort0_active:
                        # TODO: send voice metadata 
                        self.rc2007_gui_ref.outPort0_servant.send_data(data)    

            self.data_signal.clear()  # done reading the buffer