cpp/openttd-patchpack/source Files · src/music/allegro_m.cpp

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rubidium

(svn r16583) -Update: the order of the language files so it's in sync with english.txt. Normally WT2 would do this, but only with activity for those languages. Now we'd like to the order to match so we can more easily spot import bugs while developing WT3.

/* $Id$ */

/** @file allegro_m.cpp Playing music via allegro. */

#ifdef WITH_ALLEGRO

#include "../stdafx.h"
#include "../debug.h"
#include "allegro_m.h"
#include <allegro.h>

static FMusicDriver_Allegro iFMusicDriver_Allegro;
static MIDI *_midi = NULL;

/** 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, NULL)) return NULL;
	_allegro_instance_count++;

	/* Initialise the sound */
	if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, NULL) != 0) return NULL;

	/* Okay, there's no soundcard */
	if (midi_card == MIDI_NONE) {
		DEBUG(driver, 0, "allegro: no midi card found");
	}

	return NULL;
}

void MusicDriver_Allegro::Stop()
{
	if (_midi != NULL) destroy_midi(_midi);
	_midi = NULL;

	if (--_allegro_instance_count == 0) allegro_exit();
}

void MusicDriver_Allegro::PlaySong(const char *filename)
{
	if (_midi != NULL) destroy_midi(_midi);
	_midi = load_midi(filename);
	play_midi(_midi, false);
}

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 */