From 309af8f59e10dc4b4e18fd9864b929bd99e81ffd Mon Sep 17 00:00:00 2001
From: mid <>
Date: Sat, 28 Jun 2025 13:17:58 +0300
Subject: [PATCH] stopsmooth

---
 src/k3mix.c  | 19 ++++++++++++++++++-
 src/k3mix.h  |  2 ++
 src/luaapi.c | 16 ++++++++++++++++
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/src/k3mix.c b/src/k3mix.c
index 7d3067b..a62f0b2 100644
--- a/src/k3mix.c
+++ b/src/k3mix.c
@@ -161,12 +161,13 @@ static void queue_clone(struct k3MixWave *this, struct k3MixWave *new) {
 	new->clone = queue_clone;
 	new->close = queue_close;
 	
+	new->end = this->end;
 	new->loop = this->loop;
 	new->dam = this->dam;
 	new->volume = this->volume;
 }
 struct k3MixWave *k3MixQueue() {
-	struct k3MixWave *ret = malloc(sizeof(*ret));
+	struct k3MixWave *ret = calloc(1, sizeof(*ret));
 	ret->refs = 1;
 	ret->sampleRate = FinalSampleRate;
 	ret->channels = FinalChannels;
@@ -182,6 +183,7 @@ struct k3MixWave *k3MixQueue() {
 	ret->loop = 0;
 	ret->dam = 0;
 	ret->volume = 1;
+	ret->end = false;
 	
 	return ret;
 }
@@ -260,6 +262,7 @@ static void power_measurement_clone(struct k3MixWave *this, struct k3MixWave *ne
 	new->clone = power_measurement_clone;
 	new->close = power_measurement_close;
 	
+	new->end = this->end;
 	new->loop = this->loop;
 	new->dam = this->dam;
 	new->volume = this->volume;
@@ -308,6 +311,10 @@ struct k3MixWave *k3MixPowerMeasurement(struct k3MixWave *child) {
 static size_t playingCount, playingCapacity;
 static struct k3MixWave **playings;
 
+void k3MixStopSmooth(struct k3MixWave *wav) {
+	wav->fade = -0.01;
+}
+
 void k3MixStop(struct k3MixWave *wav) {
 	for(size_t i = 0; i < playingCount; i++) {
 		if(playings[i] == wav) {
@@ -346,6 +353,16 @@ __attribute__((optimize("Ofast"))) static void k3MixDoYourThang(size_t sampleCou
 	for(size_t i = 0; i < playingCount;) {
 		intmax_t read = playings[i]->read(playings[i], sampleCount, FinalData);
 		
+		if(playings[i]->fade) {
+			playings[i]->volume += playings[i]->fade;
+			if(playings[i]->volume > 1) {
+				playings[i]->volume = 1;
+				playings[i]->fade = 0;
+			} else if(playings[i]->volume < 0) {
+				playings[i]->end = true;
+			}
+		}
+		
 		if(playings[i]->end) {
 			k3MixStop(playings[i]);
 		} else i++;
diff --git a/src/k3mix.h b/src/k3mix.h
index 1a45408..369c849 100644
--- a/src/k3mix.h
+++ b/src/k3mix.h
@@ -29,6 +29,7 @@ struct k3MixWave {
 	bool end;
 	uint16_t dam;
 	float volume;
+	float fade;
 };
 
 void k3MixInit(uint32_t sampleRate, uint8_t channels);
@@ -44,6 +45,7 @@ struct k3MixWave *k3MixPowerMeasurement(struct k3MixWave *child);
 float k3MixPowerMeasurementGetRMS(struct k3MixWave*);
 
 void k3MixStop(struct k3MixWave*);
+void k3MixStopSmooth(struct k3MixWave*);
 struct k3MixWave *k3MixPlay(struct k3MixWave*);
 void k3MixPlayDirect(struct k3MixWave*);
 
diff --git a/src/luaapi.c b/src/luaapi.c
index 46f8abe..b86cf2d 100644
--- a/src/luaapi.c
+++ b/src/luaapi.c
@@ -17,6 +17,8 @@
 #include"net_hi.h"
 #include"k3particles.h"
 #include<GLFW/glfw3.h>
+#include"ssort.h"
+#include<ctype.h>
 
 /*
  * This is by far the least clean or well-maintained source in the
@@ -722,6 +724,17 @@ static int dagame_mixstop(lua_State *L) {
 	return 1;
 }
 
+static int dagame_mixstopsmooth(lua_State *L) {
+	struct mixitem *i = lua_touserdata(L, 1);
+	
+	assert(i->type != MIXITEM_SOURCE);
+	k3MixStopSmooth(i->thing);
+	
+	lua_pushvalue(L, 1);
+	
+	return 1;
+}
+
 static int dagame_mixpower(lua_State *L) {
 	struct mixitem *i = lua_touserdata(L, 1);
 	
@@ -2755,6 +2768,9 @@ void luaapi_init() {
 			lua_pushcfunction(L, dagame_mixstop);
 			lua_setfield(L, -2, "stop");
 			
+			lua_pushcfunction(L, dagame_mixstopsmooth);
+			lua_setfield(L, -2, "stopsmooth");
+			
 			lua_pushcfunction(L, game_mixqueue);
 			lua_setfield(L, -2, "queue");