nulldevice.hxx

SIP（Session Initiation Protocol）是由IETF定义

#ifndef NULLDEVICE_HXX
#define NULLDEVICE_HXX

/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL VOVIDA
 * NETWORKS, INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT DAMAGES
 * IN EXCESS OF $1,000, NOR FOR ANY INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */
static const char* const NullDeviceVersion =
    "$Id: NullDevice.hxx,v 1.4.2.1 2003/03/03 20:14:37 sprajpat Exp $";

#include "MediaDevice.hxx"
#include <iostream>

using Vocal::SipProxyEvent;

namespace Vocal
{

namespace UA
{

/**
 * Impelments a dummy soundcard device that does not require
 * any hardware audo device. The device is useful when just testing
 * the call signalling.
 */

class NullDevice : public MediaDevice
{
    public:
        ///Just create a dummy soundcard device
        NullDevice():
           MediaDevice(SOUNDCARD, AUDIO)
        { };

        ///
        void processAudio() { };
 
        ///Returns 0 if successfully started
        int start() { cerr << "Connected" << endl; return 0; }
        ///Returns 0 if successfully stopped
        int stop() { MediaDevice::stop(); cerr << "Disconnected" << endl; return 0; };
        ///Returns 0 if successfully suspended
        int suspend() { return 0; }
        ///Returns 0 if successfully resumed
        int resume() { return 0; };

        ///
        void sinkData(char* data, int length, VCodecType type=G711U) { vusleep(20000); };

    private:
};
 
}
}



#endif