diff vamp/CQChromaVamp.cpp @ 110:fdd32f995b0d

First cut at a chromagram plugin as well

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vamp/CQChromaVamp.cpp	Wed May 14 14:04:34 2014 +0100
@@ -0,0 +1,362 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+/*
+    Constant-Q library
+    Copyright (c) 2013-2014 Queen Mary, University of London
+
+    Permission is hereby granted, free of charge, to any person
+    obtaining a copy of this software and associated documentation
+    files (the "Software"), to deal in the Software without
+    restriction, including without limitation the rights to use, copy,
+    modify, merge, publish, distribute, sublicense, and/or sell copies
+    of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be
+    included in all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+    CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    Except as contained in this notice, the names of the Centre for
+    Digital Music; Queen Mary, University of London; and Chris Cannam
+    shall not be used in advertising or otherwise to promote the sale,
+    use or other dealings in this Software without prior written
+    authorization.
+*/
+
+#include "CQChromaVamp.h"
+
+#include "cpp-qm-dsp/CQSpectrogram.h"
+
+#include "base/Pitch.h"
+
+#include <algorithm>
+#include <cstdio>
+
+using std::string;
+using std::vector;
+using std::cerr;
+using std::endl;
+
+static const int defaultLowestOctave = 0;
+static const int defaultOctaveCount = 10;
+static const int defaultBPO = 36;
+static const float defaultTuningFrequency = 440.f;
+
+CQChromaVamp::CQChromaVamp(float inputSampleRate) :
+    Vamp::Plugin(inputSampleRate),
+    m_lowestOctave(defaultLowestOctave),
+    m_octaveCount(defaultOctaveCount),
+    m_tuningFrequency(defaultTuningFrequency),
+    m_bpo(defaultBPO),
+    m_cq(0),
+    m_maxFrequency(0),
+    m_minFrequency(0),
+    m_haveStartTime(false),
+    m_columnCount(0)
+{
+}
+
+CQChromaVamp::~CQChromaVamp()
+{
+    delete m_cq;
+}
+
+string
+CQChromaVamp::getIdentifier() const
+{
+    return "cqchromavamp";
+}
+
+string
+CQChromaVamp::getName() const
+{
+    return "Chromagram";
+}
+
+string
+CQChromaVamp::getDescription() const
+{
+    return "Extract a Constant-Q spectrogram with constant ratio of centre frequency to resolution from the audio, then wrapping it around into a single-octave chromagram.";
+}
+
+string
+CQChromaVamp::getMaker() const
+{
+    return "Queen Mary, University of London";
+}
+
+int
+CQChromaVamp::getPluginVersion() const
+{
+    return 1;
+}
+
+string
+CQChromaVamp::getCopyright() const
+{
+    return "Plugin by Chris Cannam. Method by Christian Schörkhuber and Anssi Klapuri. Copyright (c) 2013 QMUL";
+}
+
+CQChromaVamp::ParameterList
+CQChromaVamp::getParameterDescriptors() const
+{
+    ParameterList list;
+
+    ParameterDescriptor desc;
+
+    desc.identifier = "lowestoct";
+    desc.name = "Lowest Contributing Octave";
+    desc.unit = "";
+    desc.description = "Octave number of the lowest octave to include in the chromagram. Octave numbering is ASA standard, with -1 as the first octave in the MIDI range and middle-C being C4. The octave starts at C.";
+    desc.minValue = -1;
+    desc.maxValue = 12;
+    desc.defaultValue = defaultLowestOctave;
+    desc.isQuantized = true;
+    desc.quantizeStep = 1;
+    list.push_back(desc);
+
+    desc.identifier = "octaves";
+    desc.name = "Contributing Octave Count";
+    desc.unit = "octaves";
+    desc.description = "Number of octaves to use when generating the Constant-Q transform. All octaves are wrapped around and summed to produce a single octave chromagram as output.";
+    desc.minValue = 1;
+    desc.maxValue = 12;
+    desc.defaultValue = defaultOctaveCount;
+    desc.isQuantized = true;
+    desc.quantizeStep = 1;
+    list.push_back(desc);
+
+    desc.identifier = "tuning";
+    desc.name = "Tuning Frequency";
+    desc.unit = "Hz";
+    desc.description = "Frequency of concert A";
+    desc.minValue = 360;
+    desc.maxValue = 500;
+    desc.defaultValue = 440;
+    desc.isQuantized = false;
+    list.push_back(desc);
+    
+    desc.identifier = "bpo";
+    desc.name = "Bins per Octave";
+    desc.unit = "bins";
+    desc.description = "Number of constant-Q transform bins per octave";
+    desc.minValue = 2;
+    desc.maxValue = 480;
+    desc.defaultValue = defaultBPO;
+    desc.isQuantized = true;
+    desc.quantizeStep = 1;
+    list.push_back(desc);
+
+    return list;
+}
+
+float
+CQChromaVamp::getParameter(std::string param) const
+{
+    if (param == "lowestoct") {
+        return m_lowestOctave;
+    }
+    if (param == "octaves") {
+        return m_octaveCount;
+    }
+    if (param == "tuning") {
+        return m_tuningFrequency;
+    }
+    if (param == "bpo") {
+        return m_bpo;
+    }
+    std::cerr << "WARNING: CQChromaVamp::getParameter: unknown parameter \""
+              << param << "\"" << std::endl;
+    return 0.0;
+}
+
+void
+CQChromaVamp::setParameter(std::string param, float value)
+{
+    if (param == "lowestoct") {
+        m_lowestOctave = lrintf(value);
+    } else if (param == "octaves") {
+        m_octaveCount = lrintf(value);
+    } else if (param == "tuning") {
+        m_tuningFrequency = value;
+    } else if (param == "bpo") {
+        m_bpo = lrintf(value);
+    } else {
+        std::cerr << "WARNING: CQChromaVamp::setParameter: unknown parameter \""
+                  << param << "\"" << std::endl;
+    }
+}
+
+bool
+CQChromaVamp::initialise(size_t channels, size_t stepSize, size_t blockSize)
+{
+    if (m_cq) {
+	delete m_cq;
+        m_cq = 0;
+    }
+
+    if (channels < getMinChannelCount() ||
+	channels > getMaxChannelCount()) return false;
+
+    m_stepSize = stepSize;
+    m_blockSize = blockSize;
+
+    int highestOctave = m_lowestOctave + m_octaveCount - 1;
+    int highestMIDIPitch = (1 + highestOctave) * 12 + 11;
+
+    m_maxFrequency = Pitch::getFrequencyForPitch
+        (highestMIDIPitch, 0, m_tuningFrequency);
+    m_minFrequency = m_maxFrequency / pow(2, m_octaveCount + 1) *
+        pow(2, 1.0 / m_bpo);
+
+    cerr << "lowest octave: " << m_lowestOctave << ", highest octave: "
+         << highestOctave << ", highest midi pitch: " << highestMIDIPitch
+         << ", min freq " << m_minFrequency << ", max freq " << m_maxFrequency
+         << endl;
+
+    m_cq = new CQSpectrogram
+	(m_inputSampleRate, m_minFrequency, m_maxFrequency, m_bpo,
+         CQSpectrogram::InterpolateLinear);
+
+    return true;
+}
+
+void
+CQChromaVamp::reset()
+{
+    if (m_cq) {
+	delete m_cq;
+	m_cq = new CQSpectrogram
+	    (m_inputSampleRate, m_minFrequency, m_maxFrequency, m_bpo,
+             CQSpectrogram::InterpolateLinear);
+    }
+    m_haveStartTime = false;
+    m_columnCount = 0;
+}
+
+size_t
+CQChromaVamp::getPreferredStepSize() const
+{
+    return 0;
+}
+
+size_t
+CQChromaVamp::getPreferredBlockSize() const
+{
+    return 0;
+}
+
+CQChromaVamp::OutputList
+CQChromaVamp::getOutputDescriptors() const
+{
+    static const char *names[] = {
+        "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"
+    };
+
+    OutputList list;
+
+    OutputDescriptor d;
+    d.identifier = "chromagram";
+    d.name = "Chromagram";
+    d.unit = "";
+    d.description = "Chromagram obtained from output of constant-Q transform, folding over each process block into a single-octave vector";
+    d.hasFixedBinCount = true;
+    d.binCount = m_bpo;
+
+    if (m_cq) {
+        char name[20];
+        for (int i = 0; i < (int)d.binCount; ++i) {
+            float freq = m_cq->getBinFrequency(i);
+            int note = Pitch::getPitchForFrequency(freq, 0, m_tuningFrequency);
+            float nearestFreq =
+                Pitch::getFrequencyForPitch(note, 0, m_tuningFrequency);
+            sprintf(name, "%d", i);
+            if (fabs(freq - nearestFreq) < 0.01) {
+                d.binNames.push_back(name + std::string(" ") + names[note % 12]);
+            } else {
+                d.binNames.push_back(name);
+            }
+        }
+    }
+
+    d.hasKnownExtents = false;
+    d.isQuantized = false;
+    d.sampleType = OutputDescriptor::FixedSampleRate;
+    d.sampleRate = m_inputSampleRate / (m_cq ? m_cq->getColumnHop() : 256);
+    list.push_back(d);
+
+    return list;
+}
+
+CQChromaVamp::FeatureSet
+CQChromaVamp::process(const float *const *inputBuffers,
+                      Vamp::RealTime timestamp)
+{
+    if (!m_cq) {
+	cerr << "ERROR: CQChromaVamp::process: "
+	     << "Plugin has not been initialised"
+	     << endl;
+	return FeatureSet();
+    }
+
+    if (!m_haveStartTime) {
+        m_startTime = timestamp;
+        m_haveStartTime = true;
+    }
+
+    vector<double> data;
+    for (int i = 0; i < m_blockSize; ++i) data.push_back(inputBuffers[0][i]);
+    
+    vector<vector<double> > cqout = m_cq->process(data);
+    return convertToFeatures(cqout);
+}
+
+CQChromaVamp::FeatureSet
+CQChromaVamp::getRemainingFeatures()
+{
+    vector<vector<double> > cqout = m_cq->getRemainingOutput();
+    return convertToFeatures(cqout);
+}
+
+CQChromaVamp::FeatureSet
+CQChromaVamp::convertToFeatures(const vector<vector<double> > &cqout)
+{
+    FeatureSet returnFeatures;
+
+    int width = cqout.size();
+
+    for (int i = 0; i < width; ++i) {
+
+	vector<float> column(m_bpo, 0.f);
+
+        // fold and invert to put low frequencies at the start
+
+        int thisHeight = cqout[i].size();
+	for (int j = 0; j < thisHeight; ++j) {
+	    column[m_bpo - (j % m_bpo) - 1] += cqout[i][j];
+	}
+
+	Feature feature;
+	feature.hasTimestamp = true;
+        feature.timestamp = m_startTime + Vamp::RealTime::frame2RealTime
+            (m_columnCount * m_cq->getColumnHop() - m_cq->getLatency(),
+             m_inputSampleRate);
+	feature.values = column;
+	feature.label = "";
+
+        if (feature.timestamp >= m_startTime) {
+            returnFeatures[0].push_back(feature);
+        }
+
+        ++m_columnCount;
+    }
+
+    return returnFeatures;
+}
+