1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ 2 3 /* 4 Vamp 5 6 An API for audio analysis and feature extraction plugins. 7 8 Centre for Digital Music, Queen Mary, University of London. 9 Copyright 2006 Chris Cannam. 10 11 Permission is hereby granted, free of charge, to any person 12 obtaining a copy of this software and associated documentation 13 files (the "Software"), to deal in the Software without 14 restriction, including without limitation the rights to use, copy, 15 modify, merge, publish, distribute, sublicense, and/or sell copies 16 of the Software, and to permit persons to whom the Software is 17 furnished to do so, subject to the following conditions: 18 19 The above copyright notice and this permission notice shall be 20 included in all copies or substantial portions of the Software. 21 22 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 23 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 24 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 25 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR 26 ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 27 CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 28 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 29 30 Except as contained in this notice, the names of the Centre for 31 Digital Music; Queen Mary, University of London; and Chris Cannam 32 shall not be used in advertising or otherwise to promote the sale, 33 use or other dealings in this Software without prior written 34 authorization. 35 */ 36 37 #ifndef _ZERO_CROSSING_PLUGIN_H_ 38 #define _ZERO_CROSSING_PLUGIN_H_ 39 40 #include "vamp-sdk/Plugin.h" 41 42 /** 43 * Example plugin that calculates the positions and density of 44 * zero-crossing points in an audio waveform. 45 */ 46 47 class ZeroCrossing : public Vamp::Plugin 48 { 49 public: 50 ZeroCrossing(float inputSampleRate); 51 virtual ~ZeroCrossing(); 52 53 bool initialise(size_t channels, size_t stepSize, size_t blockSize); 54 void reset(); 55 getInputDomain()56 InputDomain getInputDomain() const { return TimeDomain; } 57 58 std::string getIdentifier() const; 59 std::string getName() const; 60 std::string getDescription() const; 61 std::string getMaker() const; 62 int getPluginVersion() const; 63 std::string getCopyright() const; 64 65 OutputList getOutputDescriptors() const; 66 67 FeatureSet process(const float *const *inputBuffers, 68 Vamp::RealTime timestamp); 69 70 FeatureSet getRemainingFeatures(); 71 72 protected: 73 size_t m_stepSize; 74 float m_previousSample; 75 }; 76 77 78 #endif 79