(svn r14632) -Add: support Allegro as midi backend.

source.list

@@ -123,6 +123,7 @@ window.cpp
 
 # Header Files
 #if ALLEGRO
+	music/allegro_m.h
 	sound/allegro_s.h
 	video/allegro_v.h
 #end
@@ -624,6 +625,9 @@ video/null_v.cpp
 #end
 
 # Music
+#if ALLEGRO
+	music/allegro_m.cpp
+#end
 #if DIRECTMUSIC
 	music/dmusic.cpp
 #end

src/music/allegro_m.cpp

@@ -0,0 +1,65 @@
+/* $Id$ */
+
+/** @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 */

src/music/allegro_m.h

@@ -0,0 +1,33 @@
+/* $Id$ */
+
+/** @file allegro_m.h Base support for playing music via allegro. */
+
+#ifndef MUSIC_ALLEGRO_H
+#define MUSIC_ALLEGRO_H
+
+#include "music_driver.hpp"
+
+class MusicDriver_Allegro: public MusicDriver {
+public:
+	/* virtual */ const char *Start(const char * const *param);
+
+	/* virtual */ void Stop();
+
+	/* virtual */ void PlaySong(const char *filename);
+
+	/* virtual */ void StopSong();
+
+	/* virtual */ bool IsSongPlaying();
+
+	/* virtual */ void SetVolume(byte vol);
+};
+
+class FMusicDriver_Allegro: public MusicDriverFactory<FMusicDriver_Allegro> {
+public:
+	static const int priority = 1;
+	/* virtual */ const char *GetName() { return "allegro"; }
+	/* virtual */ const char *GetDescription() { return "Allegro MIDI Driver"; }
+	/* virtual */ Driver *CreateInstance() { return new MusicDriver_Allegro(); }
+};
+
+#endif /* MUSIC_ALLEGRO_H */

src/sound/allegro_s.cpp

@@ -40,12 +40,12 @@ void SoundDriver_Allegro::MainLoop()
 
 /** There are multiple modules that might be using Allegro and
  * Allegro can only be initiated once. */
-extern int _allegro_count;
+extern int _allegro_instance_count;
 
 const char *SoundDriver_Allegro::Start(const char * const *parm)
 {
-	if (_allegro_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;
+	if (_allegro_instance_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;
-	_allegro_count++;
+	_allegro_instance_count++;
 
 	/* Initialise the sound */
 	if (install_sound(DIGI_AUTODETECT, MIDI_AUTODETECT, NULL) != 0) return NULL;
@@ -68,7 +68,7 @@ void SoundDriver_Allegro::Stop()
 	}
 	remove_sound();
 
-	if (--_allegro_count == 0) allegro_exit();
+	if (--_allegro_instance_count == 0) allegro_exit();
 }
 
 #endif /* WITH_ALLEGRO */

src/video/allegro_v.cpp

@@ -376,12 +376,12 @@ static void PollEvent()
 
 /** There are multiple modules that might be using Allegro and
  * Allegro can only be initiated once. */
-int _allegro_count = 0;
+int _allegro_instance_count = 0;
 
 const char *VideoDriver_Allegro::Start(const char * const *parm)
 {
-	if (_allegro_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;
+	if (_allegro_instance_count == 0 && install_allegro(SYSTEM_AUTODETECT, &errno, NULL)) return NULL;
-	_allegro_count++;
+	_allegro_instance_count++;
 
 	install_timer();
 	install_mouse();
@@ -396,7 +396,7 @@ const char *VideoDriver_Allegro::Start(const char * const *parm)
 
 void VideoDriver_Allegro::Stop()
 {
-	if (--_allegro_count == 0) allegro_exit();
+	if (--_allegro_instance_count == 0) allegro_exit();
 }
 
 #if defined(UNIX) || defined(__OS2__) || defined(PSP)