From ed4f9cbaa7bc95238c76d8ab52ea08b8adf7290a Mon Sep 17 00:00:00 2001
From: "Geoffrey D. Bennett" <g@b4.vu>
Date: Fri, 21 Feb 2025 00:21:12 +1030
Subject: [PATCH] Call card_destroy_callback() when an ALSA element is removed

---
 src/alsa.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/alsa.c b/src/alsa.c
index 7b6752a..ed94afa 100644
--- a/src/alsa.c
+++ b/src/alsa.c
@@ -811,12 +811,18 @@ static gboolean alsa_card_callback(
     printf("card_callback_error %d\n", err);
     exit(1);
   }
+
   if (snd_ctl_event_get_type(event) != SND_CTL_EVENT_ELEM)
     return 1;
 
   int numid = snd_ctl_event_elem_get_numid(event);
   unsigned int mask = snd_ctl_event_elem_get_mask(event);
 
+  if (mask == SND_CTL_EVENT_MASK_REMOVE) {
+    card_destroy_callback(card);
+    return 0;
+  }
+
   if (!(mask & (SND_CTL_EVENT_MASK_VALUE | SND_CTL_EVENT_MASK_INFO)))
     return 1;