Line data    Source code

       1              : /*
       2              :  *  Copyright (C) 2004-2026 Savoir-faire Linux Inc.
       3              :  *
       4              :  *  This program is free software: you can redistribute it and/or modify
       5              :  *  it under the terms of the GNU General Public License as published by
       6              :  *  the Free Software Foundation, either version 3 of the License, or
       7              :  *  (at your option) any later version.
       8              :  *
       9              :  *  This program is distributed in the hope that it will be useful,
      10              :  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
      11              :  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
      12              :  *  GNU General Public License for more details.
      13              :  *
      14              :  *  You should have received a copy of the GNU General Public License
      15              :  *  along with this program. If not, see <https://www.gnu.org/licenses/>.
      16              :  */
      17              : 
      18              : #include "dtmf.h"
      19              : 
      20              : namespace jami {
      21              : 
      22           32 : DTMF::DTMF(unsigned int sampleRate, AVSampleFormat sampleFormat)
      23           32 :     : currentTone_(0)
      24           32 :     , newTone_(0)
      25           32 :     , dtmfgenerator_(sampleRate, sampleFormat)
      26           32 : {}
      27              : 
      28              : void
      29            0 : DTMF::startTone(char code)
      30              : {
      31            0 :     newTone_ = code;
      32            0 : }
      33              : 
      34              : bool
      35            0 : DTMF::generateDTMF(AVFrame* buffer)
      36              : {
      37              :     try {
      38            0 :         if (currentTone_ != 0) {
      39              :             // Currently generating a DTMF tone
      40            0 :             if (currentTone_ == newTone_) {
      41              :                 // Continue generating the same tone
      42            0 :                 dtmfgenerator_.getNextSamples(buffer);
      43            0 :                 return true;
      44            0 :             } else if (newTone_ != 0) {
      45              :                 // New tone requested
      46            0 :                 dtmfgenerator_.getSamples(buffer, newTone_);
      47            0 :                 currentTone_ = newTone_;
      48            0 :                 return true;
      49              :             } else {
      50              :                 // Stop requested
      51            0 :                 currentTone_ = newTone_;
      52            0 :                 return false;
      53              :             }
      54              :         } else {
      55              :             // Not generating any DTMF tone
      56            0 :             if (newTone_) {
      57              :                 // Requested to generate a DTMF tone
      58            0 :                 dtmfgenerator_.getSamples(buffer, newTone_);
      59            0 :                 currentTone_ = newTone_;
      60            0 :                 return true;
      61              :             } else
      62            0 :                 return false;
      63              :         }
      64            0 :     } catch (const DTMFException& e) {
      65              :         // invalid key
      66            0 :         return false;
      67            0 :     }
      68              : }
      69              : 
      70              : } // namespace jami