X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Faudio_filter.h;h=b7a675e6b85fa3472f9e6d9ffd2aaaed42fb6975;hb=7998c12eb59c07f583db27a250ff566b543bf40b;hp=f361c27d2cf837508e53887ec7b97600b9310b68;hpb=1f82930e73679d6aec5223caa255f564339a1a2a;p=dcpomatic.git

diff --git a/src/lib/audio_filter.h b/src/lib/audio_filter.h
index f361c27d2..b7a675e6b 100644
--- a/src/lib/audio_filter.h
+++ b/src/lib/audio_filter.h
@@ -17,17 +17,22 @@
 
 */
 
-#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;
-class audio_filter_impulse_input_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)
+		: _ir (0)
 	{
 		_M = 4 / transition_bandwidth;
 		if (_M % 2) {
@@ -35,17 +40,19 @@ 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 ();
 
 protected:
-	friend class audio_filter_impulse_kernel_test;
-	friend class audio_filter_impulse_input_test;
+	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 +87,5 @@ public:
 	 */
 	BandPassAudioFilter (float transition_bandwidth, float lower, float higher);
 };
+
+#endif