allegro_m.cpp

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00001 /* $Id: allegro_m.cpp 16704 2009-06-30 20:11:36Z rubidium $ */
00002 
00005 #ifdef WITH_ALLEGRO
00006 
00007 #include "../stdafx.h"
00008 #include "../debug.h"
00009 #include "allegro_m.h"
00010 #include <allegro.h>
00011 
00012 static FMusicDriver_Allegro iFMusicDriver_Allegro;
00013 static MIDI *_midi = NULL;
00014 
00017 extern int _allegro_instance_count;
00018 
00019 const char *MusicDriver_Allegro::Start(const char * const *param)
00020 {
00021   if (_allegro_instance_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return "Failed to set up Allegro";
00022   _allegro_instance_count++;
00023 
00024   /* Initialise the sound */
00025   if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, NULL) != 0) return "Failed to set up Allegro sound";
00026 
00027   /* Okay, there's no soundcard */
00028   if (midi_card == MIDI_NONE) {
00029     DEBUG(driver, 0, "allegro: no midi card found");
00030     return "No sound card found";
00031   }
00032 
00033   return NULL;
00034 }
00035 
00036 void MusicDriver_Allegro::Stop()
00037 {
00038   if (_midi != NULL) destroy_midi(_midi);
00039   _midi = NULL;
00040 
00041   if (--_allegro_instance_count == 0) allegro_exit();
00042 }
00043 
00044 void MusicDriver_Allegro::PlaySong(const char *filename)
00045 {
00046   if (_midi != NULL) destroy_midi(_midi);
00047   _midi = load_midi(filename);
00048   play_midi(_midi, false);
00049 }
00050 
00051 void MusicDriver_Allegro::StopSong()
00052 {
00053   stop_midi();
00054 }
00055 
00056 bool MusicDriver_Allegro::IsSongPlaying()
00057 {
00058   return midi_pos >= 0;
00059 }
00060 
00061 void MusicDriver_Allegro::SetVolume(byte vol)
00062 {
00063   set_volume(-1, vol);
00064 }
00065 
00066 #endif /* WITH_ALLEGRO */

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