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38 results

HomeActivity.java

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    dtmf.cpp 2.32 KiB
    /*
     *  Copyright (C) 2004-2006 Savoir-Faire Linux inc.
     *  Author : Yan Morin <yan.morin@savoirfairelinux.com>
     *  Author : Laurielle Lea <laurielle.lea@savoirfairelinux.com> 
     *
     * 	Portions Copyright (c) 2000 Billy Biggs <bbiggs@div8.net>
     *  Portions Copyright (c) 2004 Wirlab <kphone@wirlab.net>
     *                                                                              
     *  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 3 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., 675 Mass Ave, Cambridge, MA 02139, USA.
     */
    
    #include "dtmf.h"
    
    DTMF::DTMF (unsigned int sampleRate) 
    : dtmfgenerator(sampleRate) 
    {
      currentTone = 0;
      newTone = 0;
    }
    
    DTMF::~DTMF (void) 
    {
    }
    
    void 
    DTMF::startTone (char code) 
    {
      newTone = code;
    }
    
    bool 
    DTMF::generateDTMF (SFLDataFormat* buffer, size_t n) 
    {
      if (!buffer) return false;
    
      try {
        if (currentTone != 0) {
          // Currently generating a DTMF tone
          if (currentTone == newTone) {
            // Continue generating the same tone
            dtmfgenerator.getNextSamples(buffer, n);
            return true;
          } else if (newTone != 0) {
            // New tone requested
            dtmfgenerator.getSamples(buffer, n, newTone);
            currentTone = newTone;
            return true;
          } else {
            // Stop requested
            currentTone = newTone;
            return false;
          }
        } else {
          // Not generating any DTMF tone
          if (newTone) {
            // Requested to generate a DTMF tone
            dtmfgenerator.getSamples(buffer, n, newTone);
            currentTone = newTone;
            return true;
          }
          return false;
        }
      } catch(DTMFException e) {
        // invalid key
        return false;
      }
    }