Ambient sound system (#4552)

* Ambient sound system

Client-side system that plays audio from nearby objects that are randomly sampled.

* Decent

* Tweaks

* Tweaks

* Comment this out for now

* reduce VM sound

* Fix rolloff

* Fixes

* Volume tweak

Content.Client/Audio/AmbientSoundSystem.cs

@@ -0,0 +1,178 @@
+using System.Collections.Generic;
+using System.Linq;
+using Content.Shared.Audio;
+using Content.Shared.CCVar;
+using Robust.Client.Player;
+using Robust.Shared.Audio;
+using Robust.Shared.Configuration;
+using Robust.Shared.GameObjects;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+using Robust.Shared.Player;
+using Robust.Shared.Random;
+
+namespace Content.Client.Audio
+{
+    /// <summary>
+    /// Samples nearby <see cref="AmbientSoundComponent"/> and plays audio.
+    /// </summary>
+    public sealed class AmbientSoundSystem : SharedAmbientSoundSystem
+    {
+        [Dependency] private IEntityLookup _lookup = default!;
+        [Dependency] private readonly IPlayerManager _playerManager = default!;
+        [Dependency] private readonly IRobustRandom _random = default!;
+
+        private int _maxAmbientCount;
+
+        private float _maxAmbientRange;
+        private float _cooldown;
+        private float _accumulator;
+
+        /// <summary>
+        /// How many times we can be playing 1 particular sound at once.
+        /// </summary>
+        private int _maxSingleSound = 3;
+
+        private Dictionary<AmbientSoundComponent, (IPlayingAudioStream? Stream, string Sound)> _playingSounds = new();
+
+        private const float RangeBuffer = 0.5f;
+
+        public override void Initialize()
+        {
+            base.Initialize();
+            var configManager = IoCManager.Resolve<IConfigurationManager>();
+            configManager.OnValueChanged(CCVars.AmbientCooldown, SetCooldown, true);
+            configManager.OnValueChanged(CCVars.MaxAmbientSources, SetAmbientCount, true);
+            configManager.OnValueChanged(CCVars.AmbientRange, SetAmbientRange, true);
+        }
+
+        private void SetCooldown(float value) => _cooldown = value;
+        private void SetAmbientCount(int value) => _maxAmbientCount = value;
+        private void SetAmbientRange(float value) => _maxAmbientRange = value;
+
+        public override void Shutdown()
+        {
+            base.Shutdown();
+            var configManager = IoCManager.Resolve<IConfigurationManager>();
+            configManager.UnsubValueChanged(CCVars.AmbientCooldown, SetCooldown);
+            configManager.UnsubValueChanged(CCVars.MaxAmbientSources, SetAmbientCount);
+            configManager.UnsubValueChanged(CCVars.AmbientRange, SetAmbientRange);
+        }
+
+        private int PlayingCount(string countSound)
+        {
+            var count = 0;
+
+            foreach (var (_, (_, sound)) in _playingSounds)
+            {
+                if (sound.Equals(countSound)) count++;
+            }
+
+            return count;
+        }
+
+        public override void Update(float frameTime)
+        {
+            base.Update(frameTime);
+
+            if (_cooldown <= 0f)
+            {
+                _accumulator = 0f;
+                return;
+            }
+
+            _accumulator += frameTime;
+            if (_accumulator < _cooldown) return;
+            _accumulator -= _cooldown;
+
+            var player = _playerManager.LocalPlayer?.ControlledEntity;
+            if (player == null)
+            {
+                ClearSounds();
+                return;
+            }
+
+            var coordinates = player.Transform.Coordinates;
+
+            foreach (var (comp, (stream, _)) in _playingSounds.ToArray())
+            {
+                if (!comp.Deleted && comp.Enabled && comp.Owner.Transform.Coordinates.TryDistance(EntityManager, coordinates, out var range) &&
+                    range <= comp.Range)
+                {
+                    continue;
+                }
+
+                stream?.Stop();
+
+                _playingSounds.Remove(comp);
+            }
+
+            if (_playingSounds.Count >= _maxAmbientCount) return;
+
+            SampleNearby(coordinates);
+        }
+
+        private void ClearSounds()
+        {
+            foreach (var (_, (stream, _)) in _playingSounds)
+            {
+                stream?.Stop();
+            }
+
+            _playingSounds.Clear();
+        }
+
+        /// <summary>
+        /// Get a list of ambient components in range and determine which ones to start playing.
+        /// </summary>
+        private void SampleNearby(EntityCoordinates coordinates)
+        {
+            var compsInRange = new List<AmbientSoundComponent>();
+
+            foreach (var entity in _lookup.GetEntitiesInRange(coordinates, _maxAmbientRange,
+                LookupFlags.Approximate | LookupFlags.IncludeAnchored))
+            {
+                if (!entity.TryGetComponent(out AmbientSoundComponent? ambientComp) ||
+                    _playingSounds.ContainsKey(ambientComp) ||
+                    !ambientComp.Enabled ||
+                    // We'll also do this crude distance check because it's what we're doing in the active loop above.
+                    !entity.Transform.Coordinates.TryDistance(EntityManager, coordinates, out var range) ||
+                    range > ambientComp.Range - RangeBuffer)
+                {
+                    continue;
+                }
+
+                compsInRange.Add(ambientComp);
+            }
+
+            while (_playingSounds.Count < _maxAmbientCount)
+            {
+                if (compsInRange.Count == 0) break;
+
+                var comp = _random.PickAndTake(compsInRange);
+                var sound = comp.Sound.GetSound();
+
+                if (PlayingCount(sound) >= _maxSingleSound) continue;
+
+                var audioParams = AudioHelpers
+                    .WithVariation(0.01f)
+                    .WithVolume(comp.Volume)
+                    .WithLoop(true)
+                    .WithAttenuation(Attenuation.LinearDistance)
+                    // Randomise start so 2 sources don't increase their volume.
+                    .WithPlayOffset(_random.NextFloat())
+                    .WithMaxDistance(comp.Range);
+
+                var stream = SoundSystem.Play(
+                    Filter.Local(),
+                    sound,
+                    comp.Owner,
+                    audioParams);
+
+                if (stream == null) continue;
+
+                _playingSounds[comp] = (stream, sound);
+            }
+        }
+    }
+}

Content.Client/Audio/BackgroundAudioSystem.cs

@@ -29,8 +29,8 @@ namespace Content.Client.Audio
 
         private SoundCollectionPrototype _ambientCollection = default!;
 
-        private AudioParams _ambientParams = new(-10f, 1, "Master", 0, 0, true, 0f);
+        private AudioParams _ambientParams = new(-10f, 1, "Master", 0, 0, 0, true, 0f);
-        private AudioParams _lobbyParams = new(-5f, 1, "Master", 0, 0, true, 0f);
+        private AudioParams _lobbyParams = new(-5f, 1, "Master", 0, 0, 0, true, 0f);
 
         private IPlayingAudioStream? _ambientStream;
         private IPlayingAudioStream? _lobbyStream;

Content.Client/Entry/IgnoredComponents.cs

@@ -272,7 +272,8 @@ namespace Content.Client.Entry
             "Advertise",
             "PowerNetworkBattery",
             "BatteryCharger",
-            "SpawnItemsOnUse"
+            "SpawnItemsOnUse",
+            "AmbientOnPowered",
         };
     }
 }

Content.Server/Audio/AmbientOnPoweredComponent.cs

@@ -0,0 +1,14 @@
+using Content.Shared.Audio;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Audio
+{
+    /// <summary>
+    /// Toggles <see cref="AmbientSoundComponent"/> on when powered and off when not powered.
+    /// </summary>
+    [RegisterComponent]
+    public class AmbientOnPoweredComponent : Component
+    {
+        public override string Name => "AmbientOnPowered";
+    }
+}

Content.Server/Audio/AmbientSoundSystem.cs

@@ -0,0 +1,23 @@
+using Content.Server.Power.Components;
+using Content.Shared.Audio;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Audio
+{
+    public sealed class AmbientSoundSystem : SharedAmbientSoundSystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<AmbientOnPoweredComponent, PowerChangedEvent>(HandlePowerChange);
+        }
+
+        private void HandlePowerChange(EntityUid uid, AmbientOnPoweredComponent component, PowerChangedEvent args)
+        {
+            if (!ComponentManager.TryGetComponent<AmbientSoundComponent>(uid, out var ambientSound)) return;
+            if (ambientSound.Enabled == args.Powered) return;
+            ambientSound.Enabled = args.Powered;
+            ambientSound.Dirty();
+        }
+    }
+}

Content.Server/Gravity/GravityGeneratorComponent.cs

@@ -1,6 +1,7 @@
 using Content.Server.Power.Components;
 using Content.Server.UserInterface;
 using Content.Shared.Acts;
+using Content.Shared.Audio;
 using Content.Shared.Gravity;
 using Content.Shared.Interaction;
 using Robust.Server.GameObjects;
@@ -137,6 +138,7 @@ namespace Content.Server.Gravity
         private void MakeBroken()
         {
             _status = GravityGeneratorStatus.Broken;
+            EntitySystem.Get<SharedAmbientSoundSystem>().SetAmbience(Owner.Uid, false);
 
             _appearance?.SetData(GravityGeneratorVisuals.State, Status);
             _appearance?.SetData(GravityGeneratorVisuals.CoreVisible, false);
@@ -145,6 +147,7 @@ namespace Content.Server.Gravity
         private void MakeUnpowered()
         {
             _status = GravityGeneratorStatus.Unpowered;
+            EntitySystem.Get<SharedAmbientSoundSystem>().SetAmbience(Owner.Uid, false);
 
             _appearance?.SetData(GravityGeneratorVisuals.State, Status);
             _appearance?.SetData(GravityGeneratorVisuals.CoreVisible, false);
@@ -153,6 +156,7 @@ namespace Content.Server.Gravity
         private void MakeOff()
         {
             _status = GravityGeneratorStatus.Off;
+            EntitySystem.Get<SharedAmbientSoundSystem>().SetAmbience(Owner.Uid, false);
 
             _appearance?.SetData(GravityGeneratorVisuals.State, Status);
             _appearance?.SetData(GravityGeneratorVisuals.CoreVisible, false);
@@ -161,6 +165,7 @@ namespace Content.Server.Gravity
         private void MakeOn()
         {
             _status = GravityGeneratorStatus.On;
+            EntitySystem.Get<SharedAmbientSoundSystem>().SetAmbience(Owner.Uid, true);
 
             _appearance?.SetData(GravityGeneratorVisuals.State, Status);
             _appearance?.SetData(GravityGeneratorVisuals.CoreVisible, true);

Content.Server/Light/Components/PoweredLightComponent.cs

@@ -4,6 +4,7 @@ using Content.Server.Hands.Components;
 using Content.Server.Items;
 using Content.Server.Power.Components;
 using Content.Server.Temperature.Components;
+using Content.Shared.Audio;
 using Content.Shared.Damage;
 using Content.Shared.Damage.Components;
 using Content.Shared.Interaction;
@@ -226,7 +227,7 @@ namespace Content.Server.Light.Components
 
             if (LightBulb == null) // No light bulb.
             {
-                _currentLit = false;
+                SetLight(false);
                 powerReceiver.Load = 0;
                 _appearance?.SetData(PoweredLightVisuals.BulbState, PoweredLightState.Empty);
                 return;
@@ -267,6 +268,7 @@ namespace Content.Server.Light.Components
         private void SetLight(bool value, Color? color = null)
         {
             _currentLit = value;
+            EntitySystem.Get<SharedAmbientSoundSystem>().SetAmbience(Owner.Uid, value);
 
             if (!Owner.TryGetComponent(out PointLightComponent? pointLight)) return;
             pointLight.Enabled = value;
@@ -327,6 +329,6 @@ namespace Content.Server.Light.Components
             UpdateLight();
         }
 
- 
+
     }
 }

Content.Shared/Audio/AmbientSoundComponent.cs

@@ -0,0 +1,46 @@
+using System;
+using Content.Shared.Sound;
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.ViewVariables;
+
+namespace Content.Shared.Audio
+{
+    [RegisterComponent]
+    [NetworkedComponent]
+    public sealed class AmbientSoundComponent : Component
+    {
+        public override string Name => "AmbientSound";
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("enabled")]
+        public bool Enabled { get; set; } = true;
+
+        [DataField("sound")]
+        public SoundSpecifier Sound = default!;
+
+        /// <summary>
+        /// How far away this ambient sound can potentially be heard.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("range")]
+        public float Range = 2f;
+
+        /// <summary>
+        /// Applies this volume to the sound being played.
+        /// </summary>
+        [ViewVariables(VVAccess.ReadWrite)]
+        [DataField("volume")]
+        public float Volume = -10f;
+    }
+
+    [Serializable, NetSerializable]
+    public sealed class AmbientSoundComponentState : ComponentState
+    {
+        public bool Enabled { get; init; }
+        public float Range { get; init; }
+        public float Volume { get; init; }
+    }
+}

Content.Shared/Audio/SharedAmbientSoundSystem.cs

@@ -0,0 +1,45 @@
+using Robust.Shared.GameObjects;
+using Robust.Shared.GameStates;
+
+namespace Content.Shared.Audio
+{
+    public abstract class SharedAmbientSoundSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+            SubscribeLocalEvent<AmbientSoundComponent, ComponentGetState>(GetCompState);
+            SubscribeLocalEvent<AmbientSoundComponent, ComponentHandleState>(HandleCompState);
+        }
+
+        public void SetAmbience(EntityUid uid, bool value)
+        {
+            // Reason I didn't make this eventbus for the callers is because it seemed a bit silly
+            // trying to account for damageable + powered + toggle, plus we can't just check if it's powered.
+            // So we'll just call it directly for whatever.
+            if (!ComponentManager.TryGetComponent<AmbientSoundComponent>(uid, out var ambience) ||
+                ambience.Enabled == value) return;
+
+            ambience.Enabled = value;
+            ambience.Dirty();
+        }
+
+        private void HandleCompState(EntityUid uid, AmbientSoundComponent component, ref ComponentHandleState args)
+        {
+            if (args.Current is not AmbientSoundComponentState state) return;
+            component.Enabled = state.Enabled;
+            component.Range = state.Range;
+            component.Volume = state.Volume;
+        }
+
+        private void GetCompState(EntityUid uid, AmbientSoundComponent component, ref ComponentGetState args)
+        {
+            args.State = new AmbientSoundComponentState
+            {
+                Enabled = component.Enabled,
+                Range = component.Range,
+                Volume = component.Volume,
+            };
+        }
+    }
+}

Content.Shared/CCVar/CCVars.cs

@@ -7,6 +7,22 @@ namespace Content.Shared.CCVar
     [CVarDefs]
     public sealed class CCVars : CVars
     {
+        /*
+         * Ambience
+         */
+
+        /// <summary>
+        /// How long we'll wait until re-sampling nearby objects for ambience.
+        /// </summary>
+        public static readonly CVarDef<float> AmbientCooldown =
+            CVarDef.Create("ambience.cooldown", 0.5f, CVar.REPLICATED | CVar.SERVER);
+
+        public static readonly CVarDef<float> AmbientRange =
+            CVarDef.Create("ambience.range", 5f, CVar.REPLICATED | CVar.SERVER);
+
+        public static readonly CVarDef<int> MaxAmbientSources =
+            CVarDef.Create("ambience.max_sounds", 6, CVar.REPLICATED | CVar.SERVER);
+
         /*
          * Status
          */

Content.Shared/Light/Component/SharedExpendableLightComponent.cs

@@ -29,7 +29,7 @@ namespace Content.Shared.Light.Component
     [NetworkedComponent]
     public abstract class SharedExpendableLightComponent: Robust.Shared.GameObjects.Component
     {
-        public static readonly AudioParams LoopedSoundParams = new(0, 1, "Master", 62.5f, 1, true, 0.3f);
+        public static readonly AudioParams LoopedSoundParams = new(0, 1, "Master", 62.5f, 1, 1, true, 0.3f);
 
         public sealed override string Name => "ExpendableLight";
 

Resources/Prototypes/Entities/Structures/Machines/gravity_generator.yml

@@ -6,6 +6,10 @@
   placement:
     mode: AlignTileAny
   components:
+  - type: AmbientSound
+    range: 7
+    sound:
+      path: /Audio/Ambience/Objects/gravity_gen_hum.ogg
   - type: Sprite
     netsync: false
     sprite: Structures/Machines/gravity_generator.rsi

Resources/Prototypes/Entities/Structures/Machines/vending_machines.yml

@@ -5,6 +5,12 @@
   description: Just add capitalism!
   abstract: true
   components:
+  - type: AmbientOnPowered
+  - type: AmbientSound
+    volume: -15
+    range: 3
+    sound:
+      path: /Audio/Ambience/Objects/vending_machine_hum.ogg
   - type: Sprite
     sprite: Structures/Machines/VendingMachines/empty.rsi
     netsync: false

Resources/Prototypes/Entities/Structures/Power/Generation/generator.yml

@@ -6,6 +6,10 @@
   placement:
     mode: SnapgridCenter
   components:
+  #- type: AmbientSound
+  #  range: 5
+  #  sound:
+  #    path: /Audio/Ambience/Objects/engine_hum.ogg
   - type: Clickable
   - type: InteractionOutline
   - type: Physics

Resources/Prototypes/Entities/Structures/Power/parts.yml

@@ -46,6 +46,9 @@
   placement:
     mode: SnapgridCenter
   components:
+  - type: AmbientSound
+    sound:
+      path: /Audio/Ambience/Objects/hdd_buzz.ogg
   - type: Clickable
   - type: AccessReader
     access: [["Engineering"]]

Resources/Prototypes/Entities/Structures/Power/smes.yml

@@ -7,6 +7,10 @@
   placement:
     mode: SnapgridCenter
   components:
+    - type: AmbientSound
+      range: 3
+      sound:
+        path: /Audio/Ambience/Objects/periodic_beep.ogg
     - type: Sprite
       netsync: false
       sprite: Structures/Power/smes.rsi

Resources/Prototypes/Entities/Structures/Wallmounts/lighting.yml

@@ -4,6 +4,10 @@
   description: "An unpowered light."
   suffix: Unpowered
   components:
+  - type: AmbientSound
+    volume: -12
+    sound:
+      path: /Audio/Ambience/Objects/light_hum.ogg
   - type: Clickable
   - type: InteractionOutline
   - type: Construction