ALSA: adapt to hotplug event

modules/audio_output/alsa.c

@@ -740,11 +740,6 @@ static int EnumDevices(vlc_object_t *obj, char const *varname,
     return n;
 }
 
-static int DevicesEnum (audio_output_t *aout, char ***idp, char ***namep)
-{
-    return EnumDevices (VLC_OBJECT(aout), NULL, idp, namep);
-}
-
 static int DeviceSelect (audio_output_t *aout, const char *id)
 {
     aout_sys_t *sys = aout->sys;
@@ -775,9 +770,24 @@ static int Open(vlc_object_t *obj)
     aout->start = Start;
     aout->stop = Stop;
     aout_SoftVolumeInit (aout);
-    aout->device_enum = DevicesEnum;
     aout->device_select = DeviceSelect;
     aout_DeviceReport (aout, sys->device);
+
+    /* ALSA does not support hot-plug events so list devices at startup */
+    char **ids, **names;
+    int count = EnumDevices (VLC_OBJECT(aout), NULL, &ids, &names);
+    if (count >= 0)
+    {
+        for (int i = 0; i < count; i++)
+        {
+            aout_HotplugReport (aout, ids[i], names[i]);
+            free (names[i]);
+            free (ids[i]);
+        }
+        free (names);
+        free (ids);
+    }
+
     return VLC_SUCCESS;
 error:
     free (sys);