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/*
* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file allegro_m.cpp Playing music via allegro. */
#ifdef WITH_ALLEGRO
#include "../stdafx.h"
#include "../debug.h"
#include "allegro_m.h"
#include "midifile.hpp"
#include <allegro.h>
#include "../safeguards.h"
static FMusicDriver_Allegro iFMusicDriver_Allegro;
static MIDI *_midi = nullptr;
/**
* There are multiple modules that might be using Allegro and
* Allegro can only be initiated once.
*/
extern int _allegro_instance_count;
const char *MusicDriver_Allegro::Start(const char * const *param)
{
if (_allegro_instance_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, nullptr)) {
DEBUG(driver, 0, "allegro: install_allegro failed '%s'", allegro_error);
return "Failed to set up Allegro";
}
_allegro_instance_count++;
/* Initialise the sound */
if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, nullptr) != 0) {
DEBUG(driver, 0, "allegro: install_sound failed '%s'", allegro_error);
return "Failed to set up Allegro sound";
}
/* Okay, there's no soundcard */
if (midi_card == MIDI_NONE) {
DEBUG(driver, 0, "allegro: no midi card found");
return "No sound card found";
}
return nullptr;
}
void MusicDriver_Allegro::Stop()
{
if (_midi != nullptr) destroy_midi(_midi);
_midi = nullptr;
if (--_allegro_instance_count == 0) allegro_exit();
}
void MusicDriver_Allegro::PlaySong(const MusicSongInfo &song)
{
std::string filename = MidiFile::GetSMFFile(song);
if (_midi != nullptr) destroy_midi(_midi);
if (!filename.empty()) {
_midi = load_midi(filename.c_str());
play_midi(_midi, false);
} else {
_midi = nullptr;
}
}
void MusicDriver_Allegro::StopSong()
{
stop_midi();
}
bool MusicDriver_Allegro::IsSongPlaying()
{
return midi_pos >= 0;
}
void MusicDriver_Allegro::SetVolume(byte vol)
{
set_volume(-1, vol);
}
#endif /* WITH_ALLEGRO */
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