[aravis/realtime] viewer: make stream thread high priority

[Emmanuel Pacaud <emmanuel src gnome org>]

commit d42a6d54c20ad74170eba1c41bbfa60ca2d6f44d
Author: Emmanuel Pacaud <emmanuel gnome org>
Date:   Tue Dec 2 14:32:25 2014 +0100

    viewer: make stream thread high priority

 viewer/arvviewer.c |   12 +++++++++++-
 1 files changed, 11 insertions(+), 1 deletions(-)
---
diff --git a/viewer/arvviewer.c b/viewer/arvviewer.c
index 431a21a..b49b625 100644
--- a/viewer/arvviewer.c
+++ b/viewer/arvviewer.c
@@ -526,6 +526,16 @@ bus_sync_handler (GstBus *bus, GstMessage *message, gpointer user_data)
        return GST_BUS_DROP;
 }
 
+static void
+stream_cb (void *user_data, ArvStreamCallbackType type, ArvBuffer *buffer)
+{
+       if (type == ARV_STREAM_CALLBACK_TYPE_INIT) {
+               if (!arv_make_thread_realtime (10) &&
+                   !arv_make_thread_high_priority (-10))
+                       g_warning ("Failed to make stream thread high priority");
+       }
+}
+
 void
 arv_viewer_select_camera_cb (GtkComboBox *combo_box, ArvViewer *viewer)
 {
@@ -567,7 +577,7 @@ arv_viewer_select_camera_cb (GtkComboBox *combo_box, ArvViewer *viewer)
        arv_camera_set_chunk_mode (viewer->camera, FALSE);
 
        viewer->rotation = 0;
-       viewer->stream = arv_camera_create_stream (viewer->camera, NULL, NULL);
+       viewer->stream = arv_camera_create_stream (viewer->camera, stream_cb, NULL);
        if (viewer->stream == NULL) {
                g_object_unref (viewer->camera);
                viewer->camera = NULL;