cannam@97: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@97: 
cannam@97: /*
cannam@97:     Vamp
cannam@97: 
cannam@97:     An API for audio analysis and feature extraction plugins.
cannam@97: 
cannam@97:     Centre for Digital Music, Queen Mary, University of London.
cannam@97:     Copyright 2006 Chris Cannam.
cannam@97:   
cannam@97:     Permission is hereby granted, free of charge, to any person
cannam@97:     obtaining a copy of this software and associated documentation
cannam@97:     files (the "Software"), to deal in the Software without
cannam@97:     restriction, including without limitation the rights to use, copy,
cannam@97:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@97:     of the Software, and to permit persons to whom the Software is
cannam@97:     furnished to do so, subject to the following conditions:
cannam@97: 
cannam@97:     The above copyright notice and this permission notice shall be
cannam@97:     included in all copies or substantial portions of the Software.
cannam@97: 
cannam@97:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@97:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@97:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@97:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@97:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@97:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@97:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@97: 
cannam@97:     Except as contained in this notice, the names of the Centre for
cannam@97:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@97:     shall not be used in advertising or otherwise to promote the sale,
cannam@97:     use or other dealings in this Software without prior written
cannam@97:     authorization.
cannam@97: */
cannam@97: 
cannam@97: #ifndef _ZERO_CROSSING_PLUGIN_H_
cannam@97: #define _ZERO_CROSSING_PLUGIN_H_
cannam@97: 
cannam@97: #include "vamp-sdk/Plugin.h"
cannam@97: 
cannam@97: /**
cannam@97:  * Example plugin that calculates the positions and density of
cannam@97:  * zero-crossing points in an audio waveform.
cannam@97: */
cannam@97: 
cannam@97: class ZeroCrossing : public Vamp::Plugin
cannam@97: {
cannam@97: public:
cannam@97:     ZeroCrossing(float inputSampleRate);
cannam@97:     virtual ~ZeroCrossing();
cannam@97: 
cannam@97:     bool initialise(size_t channels, size_t stepSize, size_t blockSize);
cannam@97:     void reset();
cannam@97: 
cannam@97:     InputDomain getInputDomain() const { return TimeDomain; }
cannam@97: 
cannam@97:     std::string getIdentifier() const;
cannam@97:     std::string getName() const;
cannam@97:     std::string getDescription() const;
cannam@97:     std::string getMaker() const;
cannam@97:     int getPluginVersion() const;
cannam@97:     std::string getCopyright() const;
cannam@97: 
cannam@97:     OutputList getOutputDescriptors() const;
cannam@97: 
cannam@97:     FeatureSet process(const float *const *inputBuffers,
cannam@97:                        Vamp::RealTime timestamp);
cannam@97: 
cannam@97:     FeatureSet getRemainingFeatures();
cannam@97: 
cannam@97: protected:
cannam@97:     size_t m_stepSize;
cannam@97:     float m_previousSample;
cannam@97: };
cannam@97: 
cannam@97: 
cannam@97: #endif