src/music/extmidi.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 extmidi.h Base support for playing music via an external application. */
   9
  10 #ifndef MUSIC_EXTERNAL_H
  11 #define MUSIC_EXTERNAL_H
  12
  13 #include "music_driver.hpp"
  14
  15 class MusicDriver_ExtMidi : public MusicDriver {
  16 private:
  17         std::vector<std::string> command_tokens;
  18         std::string song;
  19         pid_t pid;
  20
  21         void DoPlay();
  22         void DoStop();
  23
  24 public:
  25         std::optional<std::string_view> Start(const StringList &param) override;
  26
  27         void Stop() override;
  28
  29         void PlaySong(const MusicSongInfo &song) override;
  30
  31         void StopSong() override;
  32
  33         bool IsSongPlaying() override;
  34
  35         void SetVolume(uint8_t vol) override;
  36         std::string_view GetName() const override { return "extmidi"; }
  37 };
  38
  39 class FMusicDriver_ExtMidi : public DriverFactoryBase {
  40 public:
  41         FMusicDriver_ExtMidi() : DriverFactoryBase(Driver::DT_MUSIC, 3, "extmidi", "External MIDI Driver") {}
  42         Driver *CreateInstance() const override { return new MusicDriver_ExtMidi(); }
  43 };
  44
  45 #endif /* MUSIC_EXTERNAL_H */