From 970dcc487d7a6a6bc99e37b65ee512a2d651a583 Mon Sep 17 00:00:00 2001
From: Sam Light <sam@lightscale.co.uk>
Date: Wed, 10 Sep 2025 19:37:28 +0100
Subject: Pulse handle default sink changing

---
 src/modules/pulse.c | 33 +++++++++++++++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/src/modules/pulse.c b/src/modules/pulse.c
index f039afd..0514ee8 100644
--- a/src/modules/pulse.c
+++ b/src/modules/pulse.c
@@ -26,12 +26,18 @@ struct pulse {
     char value[VALUE_SIZE];
 };
 
+static void
+iterate_loop(struct pulse * p)
+{
+    pa_mainloop_iterate(p->ml, 1, NULL);
+}
+
 static void
 run_loop(struct pulse * p)
 {
     p->run_loop = true;
     while(p->run_loop && signal_running) {
-        pa_mainloop_iterate(p->ml, 1, NULL);
+        iterate_loop(p);
     }
 }
 
@@ -48,6 +54,10 @@ server_info_cb(pa_context * ctx, const pa_server_info * info, void * ud)
 
     size_t s = strlen(info->default_sink_name);
 
+    if(p->default_sink != NULL) {
+        free(p->default_sink);
+    }
+
     p->default_sink = malloc(s + 1);
     memset(p->default_sink, '\0', s + 1);
     strncpy(p->default_sink, info->default_sink_name, s);
@@ -75,6 +85,20 @@ state_cb(pa_context * ctx, void * ud)
     }
 }
 
+static void
+ctx_subscription_handler(
+    pa_context * c,
+    pa_subscription_event_type_t t,
+    uint32_t idx,
+    void * userdata
+)
+{
+    if(t == PA_SUBSCRIPTION_EVENT_REMOVE) {
+        struct pulse * p = (struct pulse *) userdata;
+        pa_context_get_server_info(p->ctx, server_info_cb, p);
+    }
+}
+
 struct pulse *
 pulse_new()
 {
@@ -95,6 +119,11 @@ pulse_new()
 
     run_loop(p);
 
+    pa_context_set_subscribe_callback(p->ctx, ctx_subscription_handler, p);
+    pa_context_subscribe(p->ctx, PA_SUBSCRIPTION_MASK_SINK, NULL, NULL);
+
+    iterate_loop(p);
+
     return p;
 }
 
@@ -119,7 +148,7 @@ sink_info_cb(pa_context * ctx, const pa_sink_info * info, int eol, void * ud)
     if(eol > 0) {
         stop_loop(p);
     }
-    else {
+    else if(info != NULL) {
         vol = pa_cvolume_avg(&info->volume);
         vol -= PA_VOLUME_MUTED;
         norm = PA_VOLUME_NORM - PA_VOLUME_MUTED;
-- 
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