[vlc-devel] [PATCH 03/23] Maemo: screen unblank the screen when there is a video window

[Rémi Denis-Courmont]

 * Turn the display on when video starts,
 * Poke the screensaver every 9 seconds to avoid blanking.

Unfortunately, we do not check that the video is _not_ paused yet.
OTOH, contrary to the normal VLC screensaver interface, we do not need
an interval timer even when there is no video at all.
---
 modules/video_output/Modules.am   |    2 +
 modules/video_output/xcb/window.c |   67 +++++++++++++++++++++++++++++++++++++
 2 files changed, 69 insertions(+), 0 deletions(-)

diff --git a/modules/video_output/Modules.am b/modules/video_output/Modules.am
index 29a4849..2062ed1 100644
--- a/modules/video_output/Modules.am
+++ b/modules/video_output/Modules.am
@@ -49,9 +49,11 @@ libxcb_xv_plugin_la_DEPENDENCIES =
 
 libxcb_window_plugin_la_SOURCES = xcb/window.c xcb/keys.c
 libxcb_window_plugin_la_CFLAGS = $(AM_CFLAGS) \
+	$(DBUS_CFLAGS) $(GLIB2_CFLAGS) \
 	$(XCB_CFLAGS) \
 	$(XCB_KEYSYMS_CFLAGS)
 libxcb_window_plugin_la_LIBADD = $(AM_LIBADD) \
+	-losso \
 	$(XCB_LIBS) \
 	$(XCB_KEYSYMS_LIBS)
 libxcb_window_plugin_la_DEPENDENCIES =
diff --git a/modules/video_output/xcb/window.c b/modules/video_output/xcb/window.c
index e6f93f9..2cf4c9e 100644
--- a/modules/video_output/xcb/window.c
+++ b/modules/video_output/xcb/window.c
@@ -203,6 +203,71 @@ static void CacheAtoms (vout_window_sys_t *p_sys)
 #endif
 }
 
+#define HAVE_OSSO
+#ifdef HAVE_OSSO
+#include <libosso.h>
+
+static struct
+{
+    vlc_mutex_t lock;
+    unsigned refs;
+    osso_context_t *ctx;
+    vlc_timer_t timer;
+} osso = {
+    .lock = VLC_STATIC_MUTEX,
+    .refs = 0,
+};
+
+static void vlc_osso_unblank (void *dummy)
+{
+    (void) dummy;
+
+    vlc_mutex_lock (&osso.lock);
+    osso_display_blanking_pause (osso.ctx);
+    vlc_mutex_unlock (&osso.lock);
+}
+
+static void vlc_osso_initialize (void)
+{
+    vlc_mutex_lock (&osso.lock);
+    if (osso.refs == 0)
+    {
+        /* 10 seconds is the minimum blanking interval */
+        mtime_t start = (mdate() / CLOCK_FREQ + 8) * CLOCK_FREQ;
+        mtime_t interval = 9 * CLOCK_FREQ;
+
+        if (vlc_timer_create (&osso.timer, vlc_osso_unblank, NULL))
+            goto out;
+
+        osso.ctx = osso_initialize (PACKAGE, VERSION, 0, NULL);
+        if (osso.ctx == NULL)
+        {
+            vlc_timer_destroy (osso.timer);
+            goto out;
+        }
+
+        vlc_timer_schedule (osso.timer, true, start, interval);
+        osso_display_state_on (osso.ctx);
+    }
+    osso.refs++;
+out:
+    vlc_mutex_unlock (&osso.lock);
+}
+
+static void vlc_osso_deinitialize (void)
+{
+    vlc_mutex_lock (&osso.lock);
+    if (osso.refs == 1)
+    {
+        vlc_timer_destroy (osso.timer);
+        osso_deinitialize (osso.ctx);
+    }
+    if (osso.refs > 0)
+        osso.refs--;
+    vlc_mutex_unlock (&osso.lock);
+}
+#endif
+
 /**
  * Create an X11 window.
  */
@@ -337,6 +402,7 @@ static int Open (vlc_object_t *obj)
                          wnd->handle.xid, XCB_CURRENT_TIME);
 #endif
     xcb_flush (conn); /* Make sure map_window is sent (should be useless) */
+    vlc_osso_initialize ();
     return VLC_SUCCESS;
 
 error:
@@ -355,6 +421,7 @@ static void Close (vlc_object_t *obj)
     vout_window_sys_t *p_sys = wnd->sys;
     xcb_connection_t *conn = p_sys->conn;
 
+    vlc_osso_deinitialize ();
     if (p_sys->keys)
     {
         vlc_cancel (p_sys->thread);
-- 
1.6.4.3