[mutter] sound: ask libcanberra to cache alert/desktop switch sounds

[Owen Taylor <otaylor src gnome org>]

commit 1253e6c64edcc87ce6a395ef5f8d2ed6363ff3b6
Author: Lennart Poettering <lennart poettering net>
Date:   Fri Nov 20 11:38:21 2009 -0500

    sound: ask libcanberra to cache alert/desktop switch sounds
    
    These sounds are good candidates for caching in the sound server, to
    save a bit of CPU and make reaction faster. Hence, tell libcanberra to
    cache them.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=609585

 src/core/bell.c      |    1 +
 src/core/workspace.c |    1 +
 2 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/core/bell.c b/src/core/bell.c
index 509f777..d32ad48 100644
--- a/src/core/bell.c
+++ b/src/core/bell.c
@@ -297,6 +297,7 @@ meta_bell_notify (MetaDisplay *display,
       ca_proplist_create (&p);
       ca_proplist_sets (p, CA_PROP_EVENT_ID, "bell-window-system");
       ca_proplist_sets (p, CA_PROP_EVENT_DESCRIPTION, _("Bell event"));
+      ca_proplist_sets (p, CA_PROP_CANBERRA_CACHE_CONTROL, "permanent");
 
       window = meta_display_lookup_x_window (display, xkb_bell_event->window);
       if (!window && (display->focus_window) && (display->focus_window->frame))
diff --git a/src/core/workspace.c b/src/core/workspace.c
index 881789c..b3f43ce 100644
--- a/src/core/workspace.c
+++ b/src/core/workspace.c
@@ -494,6 +494,7 @@ workspace_switch_sound(MetaWorkspace *from,
   ca_context_play(ca_gtk_context_get(), 1,
                   CA_PROP_EVENT_ID, e,
                   CA_PROP_EVENT_DESCRIPTION, "Desktop switched",
+                  CA_PROP_CANBERRA_CACHE_CONTROL, "permanent",
                   NULL);
 
  finish: