cannam@21:
vamp-sdk/Plugin.h

00001 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@21: 00002 
cannam@21: 00003 /*
cannam@21: 00004     Vamp
cannam@21: 00005 
cannam@21: 00006     An API for audio analysis and feature extraction plugins.
cannam@21: 00007 
cannam@21: 00008     Centre for Digital Music, Queen Mary, University of London.
cannam@21: 00009     Copyright 2006 Chris Cannam.
cannam@21: 00010   
cannam@21: 00011     Permission is hereby granted, free of charge, to any person
cannam@21: 00012     obtaining a copy of this software and associated documentation
cannam@21: 00013     files (the "Software"), to deal in the Software without
cannam@21: 00014     restriction, including without limitation the rights to use, copy,
cannam@21: 00015     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@21: 00016     of the Software, and to permit persons to whom the Software is
cannam@21: 00017     furnished to do so, subject to the following conditions:
cannam@21: 00018 
cannam@21: 00019     The above copyright notice and this permission notice shall be
cannam@21: 00020     included in all copies or substantial portions of the Software.
cannam@21: 00021 
cannam@21: 00022     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@21: 00023     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@21: 00024     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@21: 00025     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@21: 00026     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@21: 00027     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@21: 00028     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@21: 00029 
cannam@21: 00030     Except as contained in this notice, the names of the Centre for
cannam@21: 00031     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@21: 00032     shall not be used in advertising or otherwise to promote the sale,
cannam@21: 00033     use or other dealings in this Software without prior written
cannam@21: 00034     authorization.
cannam@21: 00035 */
cannam@21: 00036 
cannam@21: 00037 #ifndef _VAMP_SDK_PLUGIN_H_
cannam@21: 00038 #define _VAMP_SDK_PLUGIN_H_
cannam@21: 00039 
cannam@21: 00040 #include <string>
cannam@21: 00041 #include <vector>
cannam@21: 00042 #include <map>
cannam@21: 00043 
cannam@21: 00044 #include "PluginBase.h"
cannam@21: 00045 #include "RealTime.h"
cannam@21: 00046 
cannam@21: 00047 #include "plugguard.h"
cannam@21: 00048 _VAMP_SDK_PLUGSPACE_BEGIN(Plugin.h)
cannam@21: 00049 
cannam@21: 00050 namespace Vamp {
cannam@21: 00051 
cannam@21: 00124 class Plugin : public PluginBase
cannam@21: 00125 {
cannam@21: 00126 public:
cannam@21: 00127     virtual ~Plugin() { }
cannam@21: 00128 
cannam@21: 00141     virtual bool initialise(size_t inputChannels,
cannam@21: 00142                             size_t stepSize,
cannam@21: 00143                             size_t blockSize) = 0;
cannam@21: 00144 
cannam@21: 00150     virtual void reset() = 0;
cannam@21: 00151 
cannam@21: 00152     enum InputDomain { TimeDomain, FrequencyDomain };
cannam@21: 00153     
cannam@21: 00164     virtual InputDomain getInputDomain() const = 0;
cannam@21: 00165 
cannam@21: 00174     virtual size_t getPreferredBlockSize() const { return 0; }
cannam@21: 00175 
cannam@21: 00189     virtual size_t getPreferredStepSize() const { return 0; }
cannam@21: 00190 
cannam@21: 00194     virtual size_t getMinChannelCount() const { return 1; }
cannam@21: 00195 
cannam@21: 00199     virtual size_t getMaxChannelCount() const { return 1; }
cannam@21: 00200 
cannam@21: 00201     struct OutputDescriptor
cannam@21: 00202     {
cannam@21: 00209         std::string identifier;
cannam@21: 00210 
cannam@21: 00215         std::string name;
cannam@21: 00216 
cannam@21: 00222         std::string description;
cannam@21: 00223 
cannam@21: 00227         std::string unit;
cannam@21: 00228 
cannam@21: 00234         bool hasFixedBinCount;
cannam@21: 00235 
cannam@21: 00242         size_t binCount;
cannam@21: 00243 
cannam@21: 00248         std::vector<std::string> binNames;
cannam@21: 00249 
cannam@21: 00255         bool hasKnownExtents;
cannam@21: 00256 
cannam@21: 00261         float minValue;
cannam@21: 00262 
cannam@21: 00267         float maxValue;
cannam@21: 00268 
cannam@21: 00273         bool isQuantized;
cannam@21: 00274 
cannam@21: 00280         float quantizeStep;
cannam@21: 00281 
cannam@21: 00282         enum SampleType {
cannam@21: 00283 
cannam@21: 00285             OneSamplePerStep,
cannam@21: 00286 
cannam@21: 00288             FixedSampleRate,
cannam@21: 00289 
cannam@21: 00291             VariableSampleRate
cannam@21: 00292         };
cannam@21: 00293 
cannam@21: 00297         SampleType sampleType;
cannam@21: 00298 
cannam@21: 00309         float sampleRate;
cannam@21: 00310 
cannam@21: 00315         bool hasDuration;
cannam@21: 00316 
cannam@21: 00317         OutputDescriptor() : // defaults for mandatory non-class-type members
cannam@21: 00318             hasFixedBinCount(false), hasKnownExtents(false), isQuantized(false),
cannam@21: 00319             sampleType(OneSamplePerStep), hasDuration(false) { }
cannam@21: 00320     };
cannam@21: 00321 
cannam@21: 00322     typedef std::vector<OutputDescriptor> OutputList;
cannam@21: 00323 
cannam@21: 00329     virtual OutputList getOutputDescriptors() const = 0;
cannam@21: 00330 
cannam@21: 00331     struct Feature
cannam@21: 00332     {
cannam@21: 00339         bool hasTimestamp;
cannam@21: 00340 
cannam@21: 00347         RealTime timestamp;
cannam@21: 00348 
cannam@21: 00355         bool hasDuration;
cannam@21: 00356 
cannam@21: 00362         RealTime duration;
cannam@21: 00363         
cannam@21: 00369         std::vector<float> values;
cannam@21: 00370 
cannam@21: 00374         std::string label;
cannam@21: 00375 
cannam@21: 00376         Feature() : // defaults for mandatory non-class-type members
cannam@21: 00377             hasTimestamp(false), hasDuration(false) { }
cannam@21: 00378     };
cannam@21: 00379 
cannam@21: 00380     typedef std::vector<Feature> FeatureList;
cannam@21: 00381 
cannam@21: 00382     typedef std::map<int, FeatureList> FeatureSet; // key is output no
cannam@21: 00383 
cannam@21: 00411     virtual FeatureSet process(const float *const *inputBuffers,
cannam@21: 00412                                RealTime timestamp) = 0;
cannam@21: 00413 
cannam@21: 00418     virtual FeatureSet getRemainingFeatures() = 0;
cannam@21: 00419 
cannam@21: 00425     virtual std::string getType() const { return "Feature Extraction Plugin"; }
cannam@21: 00426 
cannam@21: 00427 protected:
cannam@21: 00428     Plugin(float inputSampleRate) :
cannam@21: 00429         m_inputSampleRate(inputSampleRate) { }
cannam@21: 00430 
cannam@21: 00431     float m_inputSampleRate;
cannam@21: 00432 };
cannam@21: 00433 
cannam@21: 00434 }
cannam@21: 00435 
cannam@21: 00436 _VAMP_SDK_PLUGSPACE_END(Plugin.h)
cannam@21: 00437 
cannam@21: 00438 #endif
cannam@21: 00439 
cannam@21: 00440 
cannam@21: 00441 
cannam@21: