From ca12692dc7eb682286a1405c0512db8ed162df1d Mon Sep 17 00:00:00 2001
From: LostLuma <lilly@lostluma.net>
Date: Fri, 29 Sep 2023 03:28:55 +0200
Subject: [PATCH] Pause soundmanager instead of stopping all sounds for zero
 volumes

---
 .../java/dynamic_fps/impl/DynamicFPSMod.java  | 38 +++++++++++--------
 .../impl/mixin/SoundEngineMixin.java          | 25 ++++++++++++
 src/main/resources/dynamic_fps.mixins.json    |  1 +
 3 files changed, 49 insertions(+), 15 deletions(-)
 create mode 100644 src/main/java/dynamic_fps/impl/mixin/SoundEngineMixin.java

diff --git a/src/main/java/dynamic_fps/impl/DynamicFPSMod.java b/src/main/java/dynamic_fps/impl/DynamicFPSMod.java
index dacbed60..8acbdaa0 100644
--- a/src/main/java/dynamic_fps/impl/DynamicFPSMod.java
+++ b/src/main/java/dynamic_fps/impl/DynamicFPSMod.java
@@ -109,6 +109,10 @@ public static int targetFrameRate() {
 		return config.frameRateTarget();
 	}
 
+	public static float volumeMultiplier() {
+		return config.volumeMultiplier();
+	}
+
 	public static boolean shouldShowToasts() {
 		return config.showToasts();
 	}
@@ -200,23 +204,27 @@ private static void checkForStateChanges() {
 		}
 	}
 
-	private static boolean willPauseSounds() {
-		return !minecraft.isWindowActive() && minecraft.options.pauseOnLostFocus && minecraft.screen == null;
-	}
-
 	private static void setVolumeMultiplier(float multiplier) {
-		// setting the volume to 0 stops all sounds (including music), which we want to
-		// avoid if possible.
-		// if the client would pause anyway, we don't need to do anything because that
-		// will already pause all sounds.
-		if (multiplier == 0 && willPauseSounds())
-			return;
+		// Set the sound engine to a new volume multiplier,
+		// Or instead pause it when the multiplier is zero.
 
-		var baseVolume = minecraft.options.getSoundSourceVolume(SoundSource.MASTER);
-		minecraft.getSoundManager().updateSourceVolume(
-			SoundSource.MASTER,
-			baseVolume * multiplier
-		);
+		// We can not set the sound engine to a zero volume
+		// Because it stops all actively playing sounds and
+		// Makes for a rather jarring experience when music
+		// Is stopped. Also fixes now-playing compatibility
+
+		var manager = minecraft.getSoundManager();
+
+		if (multiplier == 0) {
+			manager.pause();
+		} else {
+			manager.resume();
+
+			manager.updateSourceVolume(
+				SoundSource.MASTER,
+				minecraft.options.getSoundSourceVolume(SoundSource.MASTER) * multiplier
+			);
+		}
 	}
 
 	private static boolean checkForRender(long timeSinceLastRender) {
diff --git a/src/main/java/dynamic_fps/impl/mixin/SoundEngineMixin.java b/src/main/java/dynamic_fps/impl/mixin/SoundEngineMixin.java
new file mode 100644
index 00000000..d99aa446
--- /dev/null
+++ b/src/main/java/dynamic_fps/impl/mixin/SoundEngineMixin.java
@@ -0,0 +1,25 @@
+package dynamic_fps.impl.mixin;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+import dynamic_fps.impl.DynamicFPSMod;
+import net.minecraft.client.sounds.SoundEngine;
+
+@Mixin(SoundEngine.class)
+public class SoundEngineMixin {
+	/**
+	 * Cancels playing sounds while we are overwriting the volume to be off.
+	 *
+	 * This is done in favor of actually setting the volume to zero, because it
+	 * Allows pausing and resuming the sound engine without cancelling active sounds.
+	 */
+	@Inject(method = { "play", "playDelayed" }, at = @At("HEAD"), cancellable = true)
+	private void play(CallbackInfo callbackInfo) {
+		if (DynamicFPSMod.volumeMultiplier() == 0.0f) {
+			callbackInfo.cancel();
+		}
+	}
+}
diff --git a/src/main/resources/dynamic_fps.mixins.json b/src/main/resources/dynamic_fps.mixins.json
index b7b2616f..da9d1887 100644
--- a/src/main/resources/dynamic_fps.mixins.json
+++ b/src/main/resources/dynamic_fps.mixins.json
@@ -10,6 +10,7 @@
 		"LoadingOverlayMixin",
 		"MinecraftMixin",
 		"ScreenMixin",
+		"SoundEngineMixin",
 		"StatsScreenMixin",
 		"ToastComponentMixin",
 		"WindowMixin",