tip/code-doc/vamp-sdk_2Plugin_8h_source.html

00001 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@50: 00002
cannam@50: 00003 /*
cannam@50: 00004     Vamp
cannam@50: 00005
cannam@50: 00006     An API for audio analysis and feature extraction plugins.
cannam@50: 00007
cannam@50: 00008     Centre for Digital Music, Queen Mary, University of London.
cannam@50: 00009     Copyright 2006 Chris Cannam.
cannam@50: 00010
cannam@50: 00011     Permission is hereby granted, free of charge, to any person
cannam@50: 00012     obtaining a copy of this software and associated documentation
cannam@50: 00013     files (the "Software"), to deal in the Software without
cannam@50: 00014     restriction, including without limitation the rights to use, copy,
cannam@50: 00015     modify, merge, publish, distribute, sublicense, and/or sell copies
cannam@50: 00016     of the Software, and to permit persons to whom the Software is
cannam@50: 00017     furnished to do so, subject to the following conditions:
cannam@50: 00018
cannam@50: 00019     The above copyright notice and this permission notice shall be
cannam@50: 00020     included in all copies or substantial portions of the Software.
cannam@50: 00021
cannam@50: 00022     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
cannam@50: 00023     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
cannam@50: 00024     MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
cannam@50: 00025     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
cannam@50: 00026     ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
cannam@50: 00027     CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
cannam@50: 00028     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
cannam@50: 00029
cannam@50: 00030     Except as contained in this notice, the names of the Centre for
cannam@50: 00031     Digital Music; Queen Mary, University of London; and Chris Cannam
cannam@50: 00032     shall not be used in advertising or otherwise to promote the sale,
cannam@50: 00033     use or other dealings in this Software without prior written
cannam@50: 00034     authorization.
cannam@50: 00035 */
cannam@50: 00036
cannam@50: 00037 #ifndef _VAMP_SDK_PLUGIN_H_
cannam@50: 00038 #define _VAMP_SDK_PLUGIN_H_
cannam@50: 00039
cannam@50: 00040 #include <string>
cannam@50: 00041 #include <vector>
cannam@50: 00042 #include <map>
cannam@50: 00043
cannam@50: 00044 #include "PluginBase.h"
cannam@50: 00045 #include "RealTime.h"
cannam@50: 00046
cannam@50: 00047 #include "plugguard.h"
cannam@50: 00048 _VAMP_SDK_PLUGSPACE_BEGIN(Plugin.h)
cannam@50: 00049
cannam@50: 00050 namespace Vamp {
cannam@50: 00051
cannam@50: 00124 class Plugin : public PluginBase
cannam@50: 00125 {
cannam@50: 00126 public:
cannam@50: 00127     virtual ~Plugin() { }
cannam@50: 00128
cannam@50: 00141     virtual bool initialise(size_t inputChannels,
cannam@50: 00142                             size_t stepSize,
cannam@50: 00143                             size_t blockSize) = 0;
cannam@50: 00144
cannam@50: 00150     virtual void reset() = 0;
cannam@50: 00151
cannam@50: 00152     enum InputDomain { TimeDomain, FrequencyDomain };
cannam@50: 00153
cannam@50: 00169     virtual InputDomain getInputDomain() const = 0;
cannam@50: 00170
cannam@50: 00179     virtual size_t getPreferredBlockSize() const { return 0; }
cannam@50: 00180
cannam@50: 00194     virtual size_t getPreferredStepSize() const { return 0; }
cannam@50: 00195
cannam@50: 00199     virtual size_t getMinChannelCount() const { return 1; }
cannam@50: 00200
cannam@50: 00204     virtual size_t getMaxChannelCount() const { return 1; }
cannam@50: 00205
cannam@50: 00206     struct OutputDescriptor
cannam@50: 00207     {
cannam@50: 00214         std::string identifier;
cannam@50: 00215
cannam@50: 00220         std::string name;
cannam@50: 00221
cannam@50: 00227         std::string description;
cannam@50: 00228
cannam@50: 00232         std::string unit;
cannam@50: 00233
cannam@50: 00239         bool hasFixedBinCount;
cannam@50: 00240
cannam@50: 00247         size_t binCount;
cannam@50: 00248
cannam@50: 00253         std::vector<std::string> binNames;
cannam@50: 00254
cannam@50: 00260         bool hasKnownExtents;
cannam@50: 00261
cannam@50: 00266         float minValue;
cannam@50: 00267
cannam@50: 00272         float maxValue;
cannam@50: 00273
cannam@50: 00278         bool isQuantized;
cannam@50: 00279
cannam@50: 00285         float quantizeStep;
cannam@50: 00286
cannam@50: 00287         enum SampleType {
cannam@50: 00288
cannam@50: 00290             OneSamplePerStep,
cannam@50: 00291
cannam@50: 00293             FixedSampleRate,
cannam@50: 00294
cannam@50: 00296             VariableSampleRate
cannam@50: 00297         };
cannam@50: 00298
cannam@50: 00302         SampleType sampleType;
cannam@50: 00303
cannam@50: 00314         float sampleRate;
cannam@50: 00315
cannam@50: 00320         bool hasDuration;
cannam@50: 00321
cannam@50: 00322         OutputDescriptor() : // defaults for mandatory non-class-type members
cannam@50: 00323             hasFixedBinCount(false), hasKnownExtents(false), isQuantized(false),
cannam@50: 00324             sampleType(OneSamplePerStep), hasDuration(false) { }
cannam@50: 00325     };
cannam@50: 00326
cannam@50: 00327     typedef std::vector<OutputDescriptor> OutputList;
cannam@50: 00328
cannam@50: 00334     virtual OutputList getOutputDescriptors() const = 0;
cannam@50: 00335
cannam@50: 00336     struct Feature
cannam@50: 00337     {
cannam@50: 00344         bool hasTimestamp;
cannam@50: 00345
cannam@50: 00352         RealTime timestamp;
cannam@50: 00353
cannam@50: 00360         bool hasDuration;
cannam@50: 00361
cannam@50: 00367         RealTime duration;
cannam@50: 00368
cannam@50: 00374         std::vector<float> values;
cannam@50: 00375
cannam@50: 00379         std::string label;
cannam@50: 00380
cannam@50: 00381         Feature() : // defaults for mandatory non-class-type members
cannam@50: 00382             hasTimestamp(false), hasDuration(false) { }
cannam@50: 00383     };
cannam@50: 00384
cannam@50: 00385     typedef std::vector<Feature> FeatureList;
cannam@50: 00386
cannam@50: 00387     typedef std::map<int, FeatureList> FeatureSet; // key is output no
cannam@50: 00388
cannam@50: 00416     virtual FeatureSet process(const float *const *inputBuffers,
cannam@50: 00417                                RealTime timestamp) = 0;
cannam@50: 00418
cannam@50: 00423     virtual FeatureSet getRemainingFeatures() = 0;
cannam@50: 00424
cannam@50: 00430     virtual std::string getType() const { return "Feature Extraction Plugin"; }
cannam@50: 00431
cannam@50: 00432 protected:
cannam@50: 00433     Plugin(float inputSampleRate) :
cannam@50: 00434         m_inputSampleRate(inputSampleRate) { }
cannam@50: 00435
cannam@50: 00436     float m_inputSampleRate;
cannam@50: 00437 };
cannam@50: 00438
cannam@50: 00439 }
cannam@50: 00440
cannam@50: 00441 _VAMP_SDK_PLUGSPACE_END(Plugin.h)
cannam@50: 00442
cannam@50: 00443 #endif
cannam@50: 00444
cannam@50: 00445
cannam@50: 00446
cannam@50: