Breathing Sounds While in Space

Upstream port of https://github.com/CHOMPStation2/CHOMPStation2/pull/3831

Plays a breathing sound akin to Bay's breathing sound while you're in space.

Major difference (codewise) is the ability to set an inhale + exhale sound, and it is currently designed SOLELY to be heard while in space.
Keep inhale + exhale combined to 7 seconds or less if you add custom sounds.
The code DOES support custom breathing per-species, if you see fit to add that for w/e reason.

Any internals playing breathing sounds later on may be looked at, but for now, this gets breathing working.

Does not come with a pref currently, as it's quiet - and intended to be an audible indicator of if you're breathing or not.
(IE if you don't hear it, be concerned.)

code/modules/mob/living/carbon/human/human.dm

@@ -19,6 +19,7 @@
 	var/can_defib = 1					//Horrible damage (like beheadings) will prevent defibbing organics.
 	var/active_regen = FALSE //Used for the regenerate proc in human_powers.dm
 	var/active_regen_delay = 300
+	var/last_breath_sound				// Feels weird doing this, but allows us to store the value across proc calls per-mob.
 
 /mob/living/carbon/human/Initialize(mapload, var/new_species = null)
 	if(!dna)

code/modules/mob/living/carbon/human/life.dm

@@ -564,6 +564,15 @@
 		failed_last_breath = 0
 		adjustOxyLoss(-5)
 		
+	if(!does_not_breathe && client) // If we breathe, and have an active client, check if we have synthetic lungs.
+		var/obj/item/organ/internal/lungs/L = internal_organs_by_name[O_LUNGS]
+		if(L.robotic < ORGAN_ROBOT && (istype(get_turf(src), /turf/space))) // Only non-synthetic lungs, please, and only play these while we're in space.
+			if(!failed_inhale && (world.time >= (last_breath_sound + 7 SECONDS))) // Were we able to inhale successfully? Play inhale.
+				var/mob/living/carbon/human/M = src
+				var/exhale = failed_exhale // Pass through if we passed exhale or not
+				play_inhale(M, exhale)
+				last_breath_sound = world.time
+
 
 	// Hot air hurts :(
 	if((breath.temperature <= species.cold_discomfort_level || breath.temperature >= species.heat_discomfort_level) && !(COLD_RESISTANCE in mutations))
@@ -630,6 +639,26 @@
 	breath.update_values()
 	return 1
 	
+/mob/living/carbon/human/proc/play_inhale(var/mob/living/M, var/exhale)
+	var/suit_inhale_sound
+	if(species.suit_inhale_sound)
+		suit_inhale_sound = species.suit_inhale_sound
+	else // Failsafe
+		suit_inhale_sound = 'sound/effects/mob_effects/suit_breathe_in.ogg'
+	
+	M << sound(suit_inhale_sound,0,0,0,100)
+	if(!exhale) // Did we fail exhale? If no, play it after inhale finishes.
+		addtimer(CALLBACK(src, .proc/play_exhale, M), 5 SECONDS)
+	
+/mob/living/carbon/human/proc/play_exhale(var/mob/living/M)
+	var/suit_exhale_sound
+	if(species.suit_exhale_sound)
+		suit_exhale_sound = species.suit_exhale_sound
+	else // Failsafe
+		suit_exhale_sound = 'sound/effects/mob_effects/suit_breathe_out.ogg'
+	
+	M << sound(suit_exhale_sound,0,0,0,100)
+
 /mob/living/carbon/human/handle_environment(datum/gas_mixture/environment)
 	if(!environment)
 		return

code/modules/mob/living/carbon/human/species/species.dm

@@ -129,6 +129,8 @@
 	var/breath_type = "oxygen"								// Non-oxygen gas breathed, if any.
 	var/poison_type = "phoron"								// Poisonous air.
 	var/exhale_type = "carbon_dioxide"						// Exhaled gas type.
+	var/suit_inhale_sound = 'sound/effects/mob_effects/suit_breathe_in.ogg'
+	var/suit_exhale_sound = 'sound/effects/mob_effects/suit_breathe_out.ogg'
 
 	var/body_temperature = 310.15							// Species will try to stabilize at this temperature. (also affects temperature processing)