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/* $Id$ */

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

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#ifdef WITH_ALLEGRO

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#include "../stdafx.h"

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#include "../debug.h"

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#include "allegro_m.h"

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#include <allegro.h>

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static FMusicDriver_Allegro iFMusicDriver_Allegro;

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static MIDI *_midi = NULL;

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/** There are multiple modules that might be using Allegro and

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 * Allegro can only be initiated once. */

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extern int _allegro_instance_count;

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const char *MusicDriver_Allegro::Start(const char * const *param)

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{

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	if (_allegro_instance_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;

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	_allegro_instance_count++;

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	/* Initialise the sound */

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	if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, NULL) != 0) return NULL;

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	/* Okay, there's no soundcard */

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	if (midi_card == MIDI_NONE) {

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		DEBUG(driver, 0, "allegro: no midi card found");

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	}

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	return NULL;

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}

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void MusicDriver_Allegro::Stop()

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{

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	if (_midi != NULL) destroy_midi(_midi);

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	_midi = NULL;

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

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}

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void MusicDriver_Allegro::PlaySong(const char *filename)

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{

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	if (_midi != NULL) destroy_midi(_midi);

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	_midi = load_midi(filename);

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	play_midi(_midi, false);

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}

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void MusicDriver_Allegro::StopSong()

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{

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	stop_midi();

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}

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bool MusicDriver_Allegro::IsSongPlaying()

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{

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	return midi_pos >= 0;

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}

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void MusicDriver_Allegro::SetVolume(byte vol)

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{

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	set_volume(-1, vol);

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}

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#endif /* WITH_ALLEGRO */