X-Git-Url: https://main.carlh.net/gitweb/?p=dcpomatic.git;a=blobdiff_plain;f=src%2Flib%2Faudio_filter.h;h=fb7b7b92ccb64283d7bc01235b35d486f0c5422b;hp=9fc69daadb23574158e6b298d7b0140a23071716;hb=6ef1fc5f40567650ca9ef2b7644e4fdd97640ae6;hpb=b6c780d3107557d452c6612d715d01e2be52dbda

diff --git a/src/lib/audio_filter.h b/src/lib/audio_filter.h
index 9fc69daad..fb7b7b92c 100644
--- a/src/lib/audio_filter.h
+++ b/src/lib/audio_filter.h
@@ -1,33 +1,39 @@
 /*
     Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
-#include <vector>
+#ifndef DCPOMATIC_AUDIO_FILTER_H
+#define DCPOMATIC_AUDIO_FILTER_H
+
 #include <boost/shared_ptr.hpp>
 
 class AudioBuffers;
-class audio_filter_impulse_kernel_test;
 struct audio_filter_impulse_input_test;
 
+/** An audio filter which can take AudioBuffers and apply some filtering operation,
+ *  returning filtered samples
+ */
 class AudioFilter
 {
 public:
-	AudioFilter (float transition_bandwidth)
+	explicit AudioFilter (float transition_bandwidth)
+		: _ir (0)
 	{
 		_M = 4 / transition_bandwidth;
 		if (_M % 2) {
@@ -35,7 +41,9 @@ public:
 		}
 	}
 
-	boost::shared_ptr<AudioBuffers> run (boost::shared_ptr<AudioBuffers> in);
+	virtual ~AudioFilter ();
+
+	boost::shared_ptr<AudioBuffers> run (boost::shared_ptr<const AudioBuffers> in);
 
 	void flush ();
 
@@ -43,9 +51,9 @@ protected:
 	friend struct audio_filter_impulse_kernel_test;
 	friend struct audio_filter_impulse_input_test;
 
-	std::vector<float> sinc_blackman (float cutoff, bool invert) const;
+	float* sinc_blackman (float cutoff, bool invert) const;
 
-	std::vector<float> _ir;
+	float* _ir;
 	int _M;
 	boost::shared_ptr<AudioBuffers> _tail;
 };
@@ -80,3 +88,5 @@ public:
 	 */
 	BandPassAudioFilter (float transition_bandwidth, float lower, float higher);
 };
+
+#endif