Line data    Source code

       1             : /*
       2             :  *  Copyright (C) 2004-2024 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          33 : DTMF::DTMF(unsigned int sampleRate, AVSampleFormat sampleFormat)
      23          33 :     : currentTone_(0)
      24          33 :     , newTone_(0)
      25          33 :     , dtmfgenerator_(sampleRate, sampleFormat)
      26          33 : {}
      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