X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Faudio_filter.h;fp=src%2Flib%2Faudio_filter.h;h=640e910ca83445ff970d7fe3a766385c6c98ea02;hp=cc3734cde6ad86b7d0e82c2e85542674143f55b1;hb=1dab4d3d084eda74612a3ebf0688ebc6fda7e78b;hpb=6495409c098a1a295f344b30a0fb65d090513091

diff --git a/src/lib/audio_filter.h b/src/lib/audio_filter.h
index cc3734cde..640e910ca 100644
--- a/src/lib/audio_filter.h
+++ b/src/lib/audio_filter.h
@@ -17,6 +17,9 @@
 
 */
 
+#ifndef DCPOMATIC_AUDIO_FILTER_H
+#define DCPOMATIC_AUDIO_FILTER_H
+
 #include <boost/shared_ptr.hpp>
 #include <vector>
 
@@ -34,7 +37,7 @@ public:
 		}
 	}
 
-	boost::shared_ptr<AudioBuffers> run (boost::shared_ptr<AudioBuffers> in);
+	boost::shared_ptr<AudioBuffers> run (boost::shared_ptr<const AudioBuffers> in);
 
 	void flush ();
 
@@ -79,3 +82,5 @@ public:
 	 */
 	BandPassAudioFilter (float transition_bandwidth, float lower, float higher);
 };
+
+#endif