libsound/NullSoundHandler.h

   1 // NullSoundHandler - fake sound handler, for testing gnash
   2 //
   3 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Free Software
   4 //   Foundation, Inc
   5 //
   6 // This program is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 3 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // This program is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with this program; if not, write to the Free Software
  18 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19
  20
  21 #ifndef NULL_SOUND_HANDLER_H
  22 #define NULL_SOUND_HANDLER_H
  23
  24 #include "sound_handler.h" // for inheritance
  25 #include "dsodefs.h" // for DSOEXPORT
  26
  27 namespace gnash {
  28
  29 namespace media {
  30     class MediaHandler;
  31 }
  32
  33 namespace sound {
  34
  35 /// Null sound_handler, for testing or manual fetching of samples
  36 class DSOEXPORT NullSoundHandler : public sound_handler
  37 {
  38 public:
  39
  40     sound_handler* _mixer;
  41
  42     NullSoundHandler(media::MediaHandler* m, sound_handler* mixer=0)
  43         :
  44         sound_handler(m),
  45         _mixer(mixer)
  46     {}
  47
  48     // If a _mixer was given, let it do the mixing!
  49     void mix(boost::int16_t* outSamples, boost::int16_t* inSamples,
  50                 unsigned int nSamples, float volume)
  51     {
  52         if ( _mixer ) _mixer->mix(outSamples, inSamples, nSamples, volume);
  53         else {
  54             // cheating, just copy input to output, which in NO WAY
  55             // can be considered "mixing"
  56             std::copy(outSamples, outSamples+nSamples, inSamples);
  57         }
  58     }
  59
  60
  61 };
  62
  63 } // gnash.sound namespace
  64 } // namespace gnash
  65
  66 #endif // NULL_SOUND_HANDLER_H
  67
  68
  69 // Local Variables:
  70 // mode: C++
  71 // indent-tabs-mode: t
  72 // End: