Try and only use the PCM buffer low latency mode in sound settings when we really need to.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16496 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 47 insertions, 0 deletions

diff --git a/apps/menus/menu_common.c b/apps/menus/menu_common.c
new file mode 100644
index 0000000..2f3844c
--- /dev/null
+++ b/apps/menus/menu_common.c
@@ -0,0 +1,47 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 Dan Everton
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <stddef.h>
+#include <limits.h>
+#include "config.h"
+#include "action.h"
+#include "menu.h"
+#include "menu_common.h"
+#if CONFIG_CODEC == SWCODEC
+#include "pcmbuf.h"
+#endif
+
+#if CONFIG_CODEC == SWCODEC
+/* Use this callback if your menu adjusts DSP settings. */
+int lowlatency_callback(int action, const struct menu_item_ex *this_item)
+{
+    (void)this_item;
+    switch (action)
+    {
+        case ACTION_ENTER_MENUITEM: /* on entering an item */
+            pcmbuf_set_low_latency(true);
+            break;
+        case ACTION_EXIT_MENUITEM: /* on exit */
+            pcmbuf_set_low_latency(false);
+            break;
+    }
+    return action;
+}
+#endif
+