replay_gain: trigger OPTIONS idle event on mode change

doc/protocol.xml

@@ -195,7 +195,7 @@
                 <para>
                   <returnvalue>options</returnvalue>: options like
                   <option>repeat</option>, <option>random</option>,
-                  <option>crossfade</option>
+                  <option>crossfade</option>, replay gain
                 </para>
               </listitem>
             </itemizedlist>
@@ -520,6 +520,10 @@
               seconds, because the new settings does not affect the
               buffered data.
             </para>
+            <para>
+              This command triggers the
+              <returnvalue>options</returnvalue> idle event.
+            </para>
           </listitem>
         </varlistentry>
         <varlistentry id="command_replay_gain_status">

src/replay_gain.c

@@ -24,6 +24,7 @@
 #include "conf.h"
 #include "audio_format.h"
 #include "pcm_volume.h"
+#include "idle.h"
 
 #include <glib.h>
 
@@ -75,6 +76,8 @@ replay_gain_set_mode_string(const char *p)
 	else
 		return false;
 
+	idle_add(IDLE_OPTIONS);
+
 	return true;
 }
 

test/read_tags.c

@@ -25,6 +25,7 @@
 #include "tag_ape.h"
 #include "tag_id3.h"
 #include "config.h"
+#include "idle.h"
 
 #include <glib.h>
 
@@ -35,6 +36,14 @@
 #include <locale.h>
 #endif
 
+/**
+ * No-op dummy.
+ */
+void
+idle_add(G_GNUC_UNUSED unsigned flags)
+{
+}
+
 /**
  * No-op dummy.
  */

test/run_decoder.c

@@ -22,12 +22,21 @@
 #include "input_stream.h"
 #include "audio_format.h"
 #include "pcm_volume.h"
+#include "idle.h"
 
 #include <glib.h>
 
 #include <assert.h>
 #include <unistd.h>
 
+/**
+ * No-op dummy.
+ */
+void
+idle_add(G_GNUC_UNUSED unsigned flags)
+{
+}
+
 /**
  * No-op dummy.
  */