/*
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)
+ : _ir (0)
{
_M = 4 / transition_bandwidth;
if (_M % 2) {
}
}
- 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 ();
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;
};
*/
BandPassAudioFilter (float transition_bandwidth, float lower, float higher);
};
+
+#endif