cannam@198: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@198: 
cannam@198: /*
cannam@198:     Vamp
cannam@198: 
cannam@198:     An API for audio analysis and feature extraction plugins.
cannam@198: 
cannam@198:     Centre for Digital Music, Queen Mary, University of London.
cannam@198:     Copyright 2006-2008 Chris Cannam and QMUL.
cannam@198:   
cannam@198:     Permission is hereby granted, free of charge, to any person
cannam@198:     obtaining a copy of this software and associated documentation
cannam@198:     files (the "Software"), to deal in the Software without
cannam@198:     restriction, including without limitation the rights to use, copy,
cannam@198:     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@198:     of the Software, and to permit persons to whom the Software is
cannam@198:     furnished to do so, subject to the following conditions:
cannam@198: 
cannam@198:     The above copyright notice and this permission notice shall be
cannam@198:     included in all copies or substantial portions of the Software.
cannam@198: 
cannam@198:     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@198:     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@198:     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@198:     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@198:     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@198:     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@198:     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@198: 
cannam@198:     Except as contained in this notice, the names of the Centre for
cannam@198:     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@198:     shall not be used in advertising or otherwise to promote the sale,
cannam@198:     use or other dealings in this Software without prior written
cannam@198:     authorization.
cannam@198: */
cannam@198: 
cannam@198: #ifndef _FIXED_TEMPO_ESTIMATOR_PLUGIN_H_
cannam@198: #define _FIXED_TEMPO_ESTIMATOR_PLUGIN_H_
cannam@198: 
cannam@198: #include "vamp-sdk/Plugin.h"
cannam@198: 
cannam@198: /**
cannam@198:  * Example plugin that estimates the tempo of a short fixed-tempo sample.
cannam@198:  */
cannam@198: 
cannam@198: class FixedTempoEstimator : public Vamp::Plugin
cannam@198: {
cannam@198: public:
cannam@198:     FixedTempoEstimator(float inputSampleRate);
cannam@198:     virtual ~FixedTempoEstimator();
cannam@198: 
cannam@198:     bool initialise(size_t channels, size_t stepSize, size_t blockSize);
cannam@198:     void reset();
cannam@198: 
cannam@198:     InputDomain getInputDomain() const { return FrequencyDomain; }
cannam@198: 
cannam@198:     std::string getIdentifier() const;
cannam@198:     std::string getName() const;
cannam@198:     std::string getDescription() const;
cannam@198:     std::string getMaker() const;
cannam@198:     int getPluginVersion() const;
cannam@198:     std::string getCopyright() const;
cannam@198: 
cannam@198:     size_t getPreferredStepSize() const;
cannam@198:     size_t getPreferredBlockSize() const;
cannam@198: 
cannam@198:     ParameterList getParameterDescriptors() const;
cannam@198:     float getParameter(std::string id) const;
cannam@198:     void setParameter(std::string id, float value);
cannam@198: 
cannam@198:     OutputList getOutputDescriptors() const;
cannam@198: 
cannam@198:     FeatureSet process(const float *const *inputBuffers,
cannam@198:                        Vamp::RealTime timestamp);
cannam@198: 
cannam@198:     FeatureSet getRemainingFeatures();
cannam@198: 
cannam@198: protected:
cannam@200:     class D;
cannam@200:     D *m_d;
cannam@200: 
cannam@198:     size_t m_stepSize;
cannam@198:     size_t m_blockSize;
cannam@198: 
cannam@198:     float *m_priorMagnitudes;
cannam@198: 
cannam@198:     size_t m_dfsize;
cannam@198:     float *m_df;
cannam@200:     float *m_r;
cannam@200:     float *m_fr;
cannam@204:     float *m_t;
cannam@198:     size_t m_n;
cannam@198: 
cannam@198:     Vamp::RealTime m_start;
cannam@198:     Vamp::RealTime m_lasttime;
cannam@198: 
cannam@200:     void calculate();
cannam@200:     FeatureSet assembleFeatures();
cannam@198:     float lag2tempo(int);
cannam@207:     int tempo2lag(float);
cannam@198: };
cannam@198: 
cannam@198: 
cannam@198: #endif