diff plugins/KeyDetect.cpp @ 21:d695fc2baa91

* Turning key-mode plugin into a generic key detection plugin, and attempting to
  debug it

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/KeyDetect.cpp	Mon Jan 22 17:32:40 2007 +0000
@@ -0,0 +1,356 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Vamp
+
+    An API for audio analysis and feature extraction plugins.
+
+    Centre for Digital Music, Queen Mary, University of London.
+    Copyright 2006-2007 QMUL.
+  
+    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 AUTHORS 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 "KeyDetect.h"
+
+using std::string;
+using std::vector;
+//using std::cerr;
+using std::endl;
+
+#include <cmath>
+
+
+KeyDetector::KeyDetector(float inputSampleRate) :
+    Plugin(inputSampleRate),
+    m_stepSize(0),
+    m_blockSize(0),
+    m_tuningFrequency(440),
+    m_length(10),
+    m_getKeyMode(0),
+    m_inputFrame(0),
+    m_prevKey(-1)
+{
+}
+
+KeyDetector::~KeyDetector()
+{
+    delete m_getKeyMode;
+    if ( m_inputFrame ) {
+        delete [] m_inputFrame;
+    }
+}
+
+string
+KeyDetector::getName() const
+{
+    return "qm-keydetector";
+}
+
+string
+KeyDetector::getDescription() const
+{
+    return "Key Detector";
+}
+
+string
+KeyDetector::getMaker() const
+{
+    return "Katy Noland and Christian Landone, Queen Mary, University of London";
+}
+
+int
+KeyDetector::getPluginVersion() const
+{
+    return 2;
+}
+
+string
+KeyDetector::getCopyright() const
+{
+    return "Copyright (c) 2006-2007 - All Rights Reserved";
+}
+
+KeyDetector::ParameterList
+KeyDetector::getParameterDescriptors() const
+{
+    ParameterList list;
+
+    ParameterDescriptor desc;
+    desc.name = "tuning";
+    desc.description = "Tuning Frequency";
+    desc.unit = "Hz";
+    desc.minValue = 420;
+    desc.maxValue = 460;
+    desc.defaultValue = 440;
+    desc.isQuantized = false;
+    list.push_back(desc);
+    
+    desc.name = "length";
+    desc.description = "Window Length";
+    desc.unit = "chroma frames";
+    desc.minValue = 1;
+    desc.maxValue = 30;
+    desc.defaultValue = 10;
+    desc.isQuantized = true;
+    desc.quantizeStep = 1;
+    list.push_back(desc);
+
+    return list;
+}
+
+float
+KeyDetector::getParameter(std::string param) const
+{
+    if (param == "tuning") {
+        return m_tuningFrequency;
+    }
+    if (param == "length") {
+        return m_length;
+    }
+    std::cerr << "WARNING: KeyDetect::getParameter: unknown parameter \""
+              << param << "\"" << std::endl;
+    return 0.0;
+}
+
+void
+KeyDetector::setParameter(std::string param, float value)
+{
+    if (param == "tuning") {
+        m_tuningFrequency = value;
+    } else if (param == "length") {
+        m_length = int(value + 0.1);
+    } else {
+        std::cerr << "WARNING: KeyDetect::setParameter: unknown parameter \""
+                  << param << "\"" << std::endl;
+    }
+}
+
+bool
+KeyDetector::initialise(size_t channels, size_t stepSize, size_t blockSize)
+{
+    if (m_getKeyMode) {
+        delete m_getKeyMode;
+        m_getKeyMode = 0;
+    }
+
+    if (channels < getMinChannelCount() ||
+	channels > getMaxChannelCount()) return false;
+
+    m_getKeyMode = new GetKeyMode(int(m_inputSampleRate + 0.1),
+                                  m_tuningFrequency,
+                                  m_length, m_length);
+
+    m_stepSize = m_getKeyMode->getHopSize();
+    m_blockSize = m_getKeyMode->getBlockSize();
+
+    if (stepSize != m_stepSize || blockSize != m_blockSize) {
+        std::cerr << "KeyDetector::initialise: step/block sizes "
+                  << stepSize << "/" << blockSize << " differ from required "
+                  << m_stepSize << "/" << m_blockSize << std::endl;
+        delete m_getKeyMode;
+        m_getKeyMode = 0;
+        return false;
+    }
+
+    m_inputFrame = new double[m_blockSize];
+
+    m_prevKey = -1;
+	
+    return true;
+}
+
+void
+KeyDetector::reset()
+{
+    if (m_getKeyMode) {
+        delete m_getKeyMode;
+        m_getKeyMode = new GetKeyMode(int(m_inputSampleRate + 0.1),
+                                      m_tuningFrequency,
+                                      m_length, m_length);
+    }
+
+    if (m_inputFrame) {
+        for( unsigned int i = 0; i < m_blockSize; i++ ) {
+            m_inputFrame[ i ] = 0.0;
+        }
+    }
+
+    m_prevKey = -1;
+}
+
+
+KeyDetector::OutputList
+KeyDetector::getOutputDescriptors() const
+{
+    OutputList list;
+
+    OutputDescriptor d;
+    d.name = "tonic";
+    d.unit = "";
+    d.description = "Tonic Pitch";
+    d.hasFixedBinCount = true;
+    d.binCount = 1;
+    d.hasKnownExtents = true;
+    d.isQuantized = true;
+    d.minValue = 0;
+    d.maxValue = 11;
+    d.quantizeStep = 1;
+    d.sampleType = OutputDescriptor::OneSamplePerStep;
+    list.push_back(d);
+
+    d.name = "mode";
+    d.unit = "";
+    d.description = "Key Mode";
+    d.hasFixedBinCount = true;
+    d.binCount = 1;
+    d.hasKnownExtents = true;
+    d.isQuantized = true;
+    d.minValue = 0;
+    d.maxValue = 1;
+    d.quantizeStep = 1;
+    d.binNames.push_back("Major = 0, Minor = 1");
+    d.sampleType = OutputDescriptor::OneSamplePerStep;
+    list.push_back(d);
+
+    d.name = "key";
+    d.unit = "";
+    d.description = "Key";
+    d.hasFixedBinCount = true;
+    d.binCount = 1;
+    d.hasKnownExtents = true;
+    d.isQuantized = true;
+    d.minValue = 0;
+    d.maxValue = 23;
+    d.quantizeStep = 1;
+    d.sampleType = OutputDescriptor::OneSamplePerStep;
+    list.push_back(d);
+
+    return list;
+}
+
+KeyDetector::FeatureSet
+KeyDetector::process(const float *const *inputBuffers,
+                     Vamp::RealTime now)
+{
+    if (m_stepSize == 0) {
+	return FeatureSet();
+    }
+
+    FeatureSet returnFeatures;
+
+    for ( unsigned int i = 0 ; i < m_blockSize; i++ ) {
+        m_inputFrame[i] = (double)inputBuffers[0][i];
+    }
+
+//    int key = (m_getKeyMode->process(m_inputFrame) % 24);
+    int key = m_getKeyMode->process(m_inputFrame);
+    int minor = m_getKeyMode->isModeMinor(key);
+    int tonic = key;
+    if (tonic > 12) tonic -= 12;
+
+    int prevTonic = m_prevKey;
+    if (prevTonic > 12) prevTonic -= 12;
+
+    if (tonic != prevTonic) {
+        Feature feature;
+        feature.hasTimestamp = false;
+//        feature.timestamp = now;
+        feature.values.push_back((float)tonic);
+        feature.label = getKeyName(tonic);
+        returnFeatures[0].push_back(feature); // tonic
+    }
+
+    if (minor != (m_getKeyMode->isModeMinor(m_prevKey))) {
+        Feature feature;
+        feature.hasTimestamp = false;
+        feature.values.push_back((float)minor);
+        feature.label = (minor ? "Minor" : "Major");
+        returnFeatures[1].push_back(feature); // mode
+    }
+
+    if (key != m_prevKey) {
+        Feature feature;
+//        feature.hasTimestamp = true;
+        feature.hasTimestamp = false;
+//        feature.timestamp = now;
+        feature.values.push_back((float)key);
+        feature.label = std::string(getKeyName(tonic));
+        if (minor) feature.label += " minor";
+        else feature.label += " major";
+        returnFeatures[2].push_back(feature); // key
+    }
+
+    m_prevKey = key;
+
+    return returnFeatures;
+}
+
+KeyDetector::FeatureSet
+KeyDetector::getRemainingFeatures()
+{
+    return FeatureSet();
+}
+
+
+size_t
+KeyDetector::getPreferredStepSize() const
+{
+    if (!m_stepSize) {
+        GetKeyMode gkm(int(m_inputSampleRate + 0.1),
+                       m_tuningFrequency, m_length, m_length);
+        m_stepSize = gkm.getHopSize();
+        m_blockSize = gkm.getBlockSize();
+    }
+    return m_stepSize;
+}
+
+size_t
+KeyDetector::getPreferredBlockSize() const
+{
+    if (!m_blockSize) {
+        GetKeyMode gkm(int(m_inputSampleRate + 0.1),
+                       m_tuningFrequency, m_length, m_length);
+        m_stepSize = gkm.getHopSize();
+        m_blockSize = gkm.getBlockSize();
+    }
+    return m_blockSize;
+}
+
+const char *
+KeyDetector::getKeyName(int index)
+{
+    static const char *names[] = {
+        "C", "C# / Db", "D", "D# / Eb",
+        "E", "F", "F# / Gb", "G",
+        "G# / Ab", "A", "A# / Bb", "B"
+    };
+    if (index < 1 || index > 12) {
+        return "(unknown)";
+    }
+    return names[index - 1];
+}
+