Add const qualifier.

diff --git a/src/lib/filter_graph.cc b/src/lib/filter_graph.cc
index 2fb1ad187edf51f9d8813d259f483a38c4fed362..44f20f7efe3d344172f174da63df06e531f9df80 100644 (file)
--- a/src/lib/filter_graph.cc
+++ b/src/lib/filter_graph.cc
@@ -74,12 +74,12 @@ FilterGraph::setup (vector<Filter const *> filters)
                throw DecodeError (N_("could not create filter graph."));
        }
 
-       AVFilter* buffer_src = avfilter_get_by_name (src_name().c_str());
+       AVFilter const * buffer_src = avfilter_get_by_name (src_name().c_str());
        if (!buffer_src) {
                throw DecodeError (N_("could not find buffer src filter"));
        }
 
-       AVFilter* buffer_sink = avfilter_get_by_name (sink_name().c_str());
+       AVFilter const * buffer_sink = avfilter_get_by_name (sink_name().c_str());
        if (!buffer_sink) {
                throw DecodeError (N_("Could not create buffer sink filter"));
        }