[totem] grilo: Limit ourselves to running one thumbnailer at a time

[Bastien Nocera <hadess src gnome org>]

commit 89693505eac61cc2f6ccd5a33e07ac5d8c4a7126
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Apr 24 17:17:36 2015 +0200

    grilo: Limit ourselves to running one thumbnailer at a time
    
    Our thumbnailer currently doesn't have support for using hardware
    decoding, so it's pretty CPU intensive. On my machine (i7 laptop with an
    SSD), one thumbnailer would take about 40% of CPU. This causes both lag
    when navigating the videos list, and carries on hampering video playback
    if thumbnailing is started before playback.
    
    This is good enough to mark this bug as fixed:
    https://bugzilla.gnome.org/show_bug.cgi?id=748370
    
    though a better solution would be to cancel thumbnailing in
    totem_grilo_pause(), make sure that
    gnome_desktop_thumbnail_path_for_uri() is cancellable, and try to
    distinguish in totem-grilo.c between cancellation because the player is
    getting shut down, and cancellation because we want all the resources to
    go to the player.

 src/icon-helpers.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/icon-helpers.c b/src/icon-helpers.c
index 53d923e..b870054 100644
--- a/src/icon-helpers.c
+++ b/src/icon-helpers.c
@@ -30,7 +30,7 @@
 #define GNOME_DESKTOP_USE_UNSTABLE_API 1
 #include <libgnome-desktop/gnome-desktop-thumbnail.h>
 
-#define DEFAULT_MAX_THREADS   5
+#define DEFAULT_MAX_THREADS   1
 #define THUMB_SEARCH_SIZE     256
 #define THUMB_SEARCH_HEIGHT   THUMB_SEARCH_SIZE
 #define SOURCES_MAX_HEIGHT    64