src/sound/null_s.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * OpenTTD 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, version 2.
   4  * OpenTTD 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.
   5  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   6  */
   7
   8 /** @file null_s.h Base for the sound of silence. */
   9
  10 #ifndef SOUND_NULL_H
  11 #define SOUND_NULL_H
  12
  13 #include "sound_driver.hpp"
  14
  15 /** Implementation of the null sound driver. */
  16 class SoundDriver_Null : public SoundDriver {
  17 public:
  18         std::optional<std::string_view> Start(const StringList &) override { return std::nullopt; }
  19
  20         void Stop() override { }
  21         std::string_view GetName() const override { return "null"; }
  22         bool HasOutput() const override { return false; }
  23 };
  24
  25 /** Factory for the null sound driver. */
  26 class FSoundDriver_Null : public DriverFactoryBase {
  27 public:
  28         FSoundDriver_Null() : DriverFactoryBase(Driver::DT_SOUND, 1, "null", "Null Sound Driver") {}
  29         Driver *CreateInstance() const override { return new SoundDriver_Null(); }
  30 };
  31
  32 #endif /* SOUND_NULL_H */