Console variables to toggle music/sound playing when the window is unfocused

Playsoundsifunfocused and playmusicifunfocused. "No" by default.

src/s_sound.c

@@ -117,6 +117,10 @@ consvar_t cv_gamedigimusic = {"digimusic", "On", CV_SAVE|CV_CALL|CV_NOINIT, CV_O
 consvar_t cv_gamemidimusic = {"midimusic", "On", CV_SAVE|CV_CALL|CV_NOINIT, CV_OnOff, GameMIDIMusic_OnChange, 0, NULL, NULL, 0, 0, NULL};
 consvar_t cv_gamesounds = {"sounds", "On", CV_SAVE|CV_CALL|CV_NOINIT, CV_OnOff, GameSounds_OnChange, 0, NULL, NULL, 0, 0, NULL};
 
+// Window focus sound sytem toggles
+consvar_t cv_playmusicifunfocused = {"playmusicifunfocused", "No", CV_SAVE, CV_YesNo};
+consvar_t cv_playsoundsifunfocused = {"playsoundsifunfocused", "No", CV_SAVE, CV_YesNo};
+
 #ifdef HAVE_OPENMPT
 static CV_PossibleValue_t interpolationfilter_cons_t[] = {{0, "Default"}, {1, "None"}, {2, "Linear"}, {4, "Cubic"}, {8, "Windowed sinc"}, {0, NULL}};
 consvar_t cv_modfilter = {"modfilter", "0", CV_SAVE|CV_CALL, interpolationfilter_cons_t, ModFilter_OnChange, 0, NULL, NULL, 0, 0, NULL};
@@ -278,6 +282,8 @@ void S_RegisterSoundStuff(void)
 	CV_RegisterVar(&cv_samplerate);
 	CV_RegisterVar(&cv_resetmusic);
 	CV_RegisterVar(&cv_resetmusicbyheader);
+	CV_RegisterVar(&cv_playsoundsifunfocused);
+	CV_RegisterVar(&cv_playmusicifunfocused);
 	CV_RegisterVar(&cv_gamesounds);
 	CV_RegisterVar(&cv_gamedigimusic);
 	CV_RegisterVar(&cv_gamemidimusic);
@@ -373,6 +379,18 @@ lumpnum_t S_GetSfxLumpNum(sfxinfo_t *sfx)
 	return W_GetNumForName("dsthok");
 }
 
+//
+// Sound Status
+//
+
+boolean S_SoundDisabled(void)
+{
+	return (
+			sound_disabled ||
+			( window_notinfocus && ! cv_playsoundsifunfocused.value )
+	);
+}
+
 // Stop all sounds, load level info, THEN start sounds.
 void S_StopSounds(void)
 {
@@ -540,7 +558,7 @@ void S_StartSoundAtVolume(const void *origin_p, sfxenum_t sfx_id, INT32 volume)
 	mobj_t *listenmobj = players[displayplayer].mo;
 	mobj_t *listenmobj2 = NULL;
 
-	if (sound_disabled || !sound_started)
+	if (S_SoundDisabled() || !sound_started)
 		return;
 
 	// Don't want a sound? Okay then...
@@ -730,7 +748,7 @@ dontplay:
 
 void S_StartSound(const void *origin, sfxenum_t sfx_id)
 {
-	if (sound_disabled)
+	if (S_SoundDisabled())
 		return;
 
 	if (mariomode) // Sounds change in Mario mode!
@@ -1434,6 +1452,13 @@ boolean S_MusicPaused(void)
 	return I_SongPaused();
 }
 
+boolean S_MusicNotInFocus(void)
+{
+	return (
+			( window_notinfocus && ! cv_playmusicifunfocused.value )
+	);
+}
+
 musictype_t S_MusicType(void)
 {
 	return I_SongType();
@@ -1867,6 +1892,10 @@ static boolean S_PlayMusic(boolean looping, UINT32 fadeinms)
 	}
 
 	S_InitMusicVolume(); // switch between digi and sequence volume
+
+	if (S_MusicNotInFocus())
+		S_PauseAudio();
+
 	return true;
 }
 
@@ -2009,6 +2038,9 @@ void S_PauseAudio(void)
 
 void S_ResumeAudio(void)
 {
+	if (S_MusicNotInFocus())
+		return;
+
 	if (I_SongPlaying() && I_SongPaused())
 		I_ResumeSong();
 

src/s_sound.h

@@ -45,6 +45,9 @@ extern consvar_t cv_gamedigimusic;
 extern consvar_t cv_gamemidimusic;
 extern consvar_t cv_gamesounds;
 
+extern consvar_t cv_playmusicifunfocused;
+extern consvar_t cv_playsoundsifunfocused;
+
 #ifdef HAVE_OPENMPT
 extern consvar_t cv_modfilter;
 #endif
@@ -144,6 +147,12 @@ void S_StartEx(boolean reset);
 //
 lumpnum_t S_GetSfxLumpNum(sfxinfo_t *sfx);
 
+//
+// Sound Status
+//
+
+boolean S_SoundDisabled(void);
+
 //
 // Start sound for thing at <origin> using <sound_id> from sounds.h
 //
@@ -164,6 +173,7 @@ boolean S_MIDIMusicDisabled(void);
 boolean S_MusicDisabled(void);
 boolean S_MusicPlaying(void);
 boolean S_MusicPaused(void);
+boolean S_MusicNotInFocus(void);
 musictype_t S_MusicType(void);
 const char *S_MusicName(void);
 boolean S_MusicInfo(char *mname, UINT16 *mflags, boolean *looping);

src/sdl/i_video.c

@@ -584,7 +584,10 @@ static void Impl_HandleWindowEvent(SDL_WindowEvent evt)
 	{
 		// Tell game we lost focus, pause music
 		window_notinfocus = true;
-		S_PauseAudio();
+		if (! cv_playmusicifunfocused.value)
+			S_PauseAudio();
+		if (! cv_playsoundsifunfocused.value)
+			S_StopSounds();
 
 		if (!disable_mouse)
 		{