Adds ambience to the SM and portable generators (#31945)

* Adds aambience to the SM and portable generators

* lowered pitch of supermatter

* start and end fix

code/datums/looping_sounds/machinery_sounds.dm

@@ -6,4 +6,19 @@
 	end_sound = 'sound/machines/shower/shower_end.ogg'
 	volume = 25
 
-///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/datum/looping_sound/supermatter
+	mid_sounds = list('sound/machines/sm/supermatter1.ogg'=1,'sound/machines/sm/supermatter2.ogg'=1,'sound/machines/sm/supermatter3.ogg'=1)
+	mid_length = 6
+	volume = 1
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+/datum/looping_sound/generator
+	start_sound = 'sound/machines/generator/generator_start.ogg'
+	start_length = 4
+	mid_sounds = list('sound/machines/generator/generator_mid1.ogg'=1, 'sound/machines/generator/generator_mid2.ogg'=1, 'sound/machines/generator/generator_mid3.ogg'=1)
+	mid_length = 4
+	end_sound = 'sound/machines/generator/generator_end.ogg'
+	volume = 40

code/modules/power/port_gen.dm

@@ -15,6 +15,15 @@
 	var/power_output = 1
 	var/consumption = 0
 	var/base_icon = "portgen0"
+	var/datum/looping_sound/generator/soundloop
+
+/obj/machinery/power/port_gen/Initialize()
+	. = ..()
+	soundloop = new(list(src), active)
+
+/obj/machinery/power/port_gen/Destroy()
+	QDEL_NULL(soundloop)
+	return ..()
 
 /obj/machinery/power/port_gen/proc/HasFuel() //Placeholder for fuel check.
 	return 1
@@ -36,11 +45,13 @@
 		add_avail(power_gen * power_output)
 		UseFuel()
 		src.updateDialog()
+		soundloop.start()
 
 	else
 		active = 0
 		handleInactive()
 		update_icon()
+		soundloop.stop()
 
 /obj/machinery/power/port_gen/attack_hand(mob/user)
 	if(..())

code/modules/power/supermatter/supermatter.dm

@@ -135,6 +135,8 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_shard)
 
 	var/is_main_engine = FALSE
 
+	var/datum/looping_sound/supermatter/soundloop
+
 /obj/machinery/power/supermatter_shard/Initialize()
 	. = ..()
 	SSair.atmos_machinery += src
@@ -149,6 +151,8 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_shard)
 	if(is_main_engine)
 		GLOB.main_supermatter_engine = src
 
+	soundloop = new(list(src), TRUE)
+
 /obj/machinery/power/supermatter_shard/Destroy()
 	investigate_log("has been destroyed.", INVESTIGATE_SUPERMATTER)
 	SSair.atmos_machinery -= src
@@ -157,7 +161,8 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_shard)
 	QDEL_NULL(countdown)
 	if(is_main_engine && GLOB.main_supermatter_engine == src)
 		GLOB.main_supermatter_engine = null
-	. = ..()
+	QDEL_NULL(soundloop)
+	return ..()
 
 /obj/machinery/power/supermatter_shard/examine(mob/user)
 	..()
@@ -251,6 +256,9 @@ GLOBAL_DATUM(main_supermatter_engine, /obj/machinery/power/supermatter_shard)
 	if(!istype(T)) 	//We are in a crate or somewhere that isn't turf, if we return to turf resume processing but for now.
 		return  //Yeah just stop.
 
+	if(power)
+		soundloop.volume = min(50, (round(power, 50)/50)+1) // 5 +1 volume per 20 power. 2500 power is max
+
 	//Ok, get the air from the turf
 	var/datum/gas_mixture/env = T.return_air()