comparison plugins/SpecDesc.cpp @ 89:e9eb5753796b

plugins/SpecDesc.{cpp,h}: added first draft for SpecDesc

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Vamp feature extraction plugins using Paul Brossier's Aubio library.
+
+    Copyright (C) 2006-2015 Paul Brossier <[e-mail]>
+
+    This file is part of vamp-aubio.
+
+    vamp-aubio is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    vamp-aubio is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with aubio.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include <math.h>
+#include "SpecDesc.h"
+
+using std::string;
+using std::vector;
+using std::cerr;
+using std::endl;
+
+SpecDesc::SpecDesc(float inputSampleRate) :
+    Plugin(inputSampleRate),
+    m_ibuf(0),
+    m_pvoc(0),
+    m_ispec(0),
+    m_specdesc(0),
+    m_out(0),
+    m_specdesctype(SpecDescFlux)
+{
+}
+
+SpecDesc::~SpecDesc()
+{
+    if (m_specdesc) del_aubio_specdesc(m_specdesc);
+    if (m_pvoc) del_aubio_pvoc(m_pvoc);
+    if (m_ibuf) del_fvec(m_ibuf);
+    if (m_ispec) del_cvec(m_ispec);
+    if (m_out) del_fvec(m_out);
+}
+
+string
+SpecDesc::getIdentifier() const
+{
+    return "aubiospecdesc";
+}
+
+string
+SpecDesc::getName() const
+{
+    return "Aubio Spectral Descriptor";
+}
+
+string
+SpecDesc::getDescription() const
+{
+    return "Compute spectral descriptor";
+}
+
+string
+SpecDesc::getMaker() const
+{
+    return "Paul Brossier";
+}
+
+int
+SpecDesc::getPluginVersion() const
+{
+    return 2;
+}
+
+string
+SpecDesc::getCopyright() const
+{
+    return "GPL";
+}
+
+bool
+SpecDesc::initialise(size_t channels, size_t stepSize, size_t blockSize)
+{
+    if (channels != 1) {
+        std::cerr << "SpecDesc::initialise: channels must be 1" << std::endl;
+        return false;
+    }
+
+    m_stepSize = stepSize;
+    m_blockSize = blockSize;
+
+    m_ibuf = new_fvec(stepSize);
+    m_ispec = new_cvec(blockSize);
+    m_out = new_fvec(1);
+
+    reset();
+
+    return true;
+}
+
+void
+SpecDesc::reset()
+{
+    if (m_pvoc) del_aubio_pvoc(m_pvoc);
+    if (m_specdesc) del_aubio_specdesc(m_specdesc);
+
+    m_specdesc = new_aubio_specdesc
+        (const_cast<char *>(getAubioNameForSpecDescType(m_specdesctype)),
+         m_blockSize);
+
+    m_pvoc = new_aubio_pvoc(m_blockSize, m_stepSize);
+}
+
+size_t
+SpecDesc::getPreferredStepSize() const
+{
+    return 512;
+}
+
+size_t
+SpecDesc::getPreferredBlockSize() const
+{
+    return 2 * getPreferredStepSize();
+}
+
+SpecDesc::ParameterList
+SpecDesc::getParameterDescriptors() const
+{
+    ParameterList list;
+
+    ParameterDescriptor desc;
+    desc.identifier = "specdesctype";
+    desc.name = "Spectral Descriptor Type";
+    desc.description = "Type of spectral descriptor to use";
+    desc.minValue = 0;
+    desc.maxValue = 7;
+    desc.defaultValue = (int)SpecDescFlux;
+    desc.isQuantized = true;
+    desc.quantizeStep = 1;
+    desc.valueNames.push_back("Spectral Flux");
+    desc.valueNames.push_back("Spectral Centroid");
+    desc.valueNames.push_back("Spectral Spread");
+    desc.valueNames.push_back("Spectral Skewness");
+    desc.valueNames.push_back("Spectral Kurtosis");
+    desc.valueNames.push_back("Spectral Slope");
+    desc.valueNames.push_back("Spectral Decrease");
+    desc.valueNames.push_back("Spectral Rolloff");
+    list.push_back(desc);
+
+    return list;
+}
+
+float
+SpecDesc::getParameter(std::string param) const
+{
+    if (param == "specdesctype") {
+        return m_specdesctype;
+    } else {
+        return 0.0;
+    }
+}
+
+void
+SpecDesc::setParameter(std::string param, float value)
+{
+    if (param == "specdesctype") {
+        switch (lrintf(value)) {
+        case 0: m_specdesctype = SpecDescFlux; break;
+        case 1: m_specdesctype = SpecDescCentroid; break;
+        case 2: m_specdesctype = SpecDescSpread; break;
+        case 3: m_specdesctype = SpecDescSkeweness; break;
+        case 4: m_specdesctype = SpecDescKurtosis; break;
+        case 5: m_specdesctype = SpecDescSlope; break;
+        case 6: m_specdesctype = SpecDescDecrease; break;
+        case 7: m_specdesctype = SpecDescRolloff; break;
+        }
+    }
+}
+
+SpecDesc::OutputList
+SpecDesc::getOutputDescriptors() const
+{
+    OutputList list;
+
+    OutputDescriptor d;
+    d.identifier = "specdesc";
+    d.name = "Spectral descriptor output";
+    d.description = "Output of the spectral descpriptor";
+    d.binCount = 1;
+    d.isQuantized = true;
+    d.quantizeStep = 1.0;
+    d.sampleType = OutputDescriptor::OneSamplePerStep;
+    list.push_back(d);
+
+    return list;
+}
+
+SpecDesc::FeatureSet
+SpecDesc::process(const float *const *inputBuffers,
+               __attribute__((unused)) Vamp::RealTime timestamp)
+{
+    for (size_t i = 0; i < m_stepSize; ++i) {
+        fvec_set_sample(m_ibuf, inputBuffers[0][i], i);
+    }
+
+    aubio_pvoc_do(m_pvoc, m_ibuf, m_ispec);
+    aubio_specdesc_do(m_specdesc, m_ispec, m_out);
+
+    FeatureSet returnFeatures;
+
+    Feature specdesc;
+    specdesc.hasTimestamp = false;
+    specdesc.values.push_back(m_out->data[0]);
+    returnFeatures[0].push_back(specdesc);
+
+    return returnFeatures;
+}
+
+SpecDesc::FeatureSet
+SpecDesc::getRemainingFeatures()
+{
+    return FeatureSet();
+}
+