add basic VAMP plugin for EBUr128 analysis

FeatureSet will be extended to report detailed analysis.

libs/vamp-plugins/EBUr128.cpp

@@ -0,0 +1,170 @@
+/* -*- 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 Chris Cannam.
+
+    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.
+
+*/
+
+#include "EBUr128.h"
+
+using std::string;
+using std::vector;
+using std::cerr;
+using std::endl;
+
+
+VampEBUr128::VampEBUr128(float inputSampleRate)
+    : Plugin(inputSampleRate)
+    , m_stepSize(0)
+{
+}
+
+VampEBUr128::~VampEBUr128()
+{
+}
+
+string
+VampEBUr128::getIdentifier() const
+{
+    return "ebur128";
+}
+
+string
+VampEBUr128::getName() const
+{
+    return "EBU R128 Loudness";
+}
+
+string
+VampEBUr128::getDescription() const
+{
+    return "Loudness measurements according to the EBU Recommendation 128";
+}
+
+string
+VampEBUr128::getMaker() const
+{
+    return "Harrison Consoles";
+}
+
+int
+VampEBUr128::getPluginVersion() const
+{
+    return 2;
+}
+
+string
+VampEBUr128::getCopyright() const
+{
+    return "GPL version 2 or later";
+}
+
+bool
+VampEBUr128::initialise(size_t channels, size_t stepSize, size_t blockSize)
+{
+    if (channels < getMinChannelCount() ||
+	channels > getMaxChannelCount()) return false;
+
+    m_stepSize = std::min(stepSize, blockSize);
+    m_channels = channels;
+
+    ebu.init (m_channels, m_inputSampleRate);
+
+    return true;
+}
+
+void
+VampEBUr128::reset()
+{
+    ebu.reset ();
+}
+
+VampEBUr128::OutputList
+VampEBUr128::getOutputDescriptors() const
+{
+    OutputList list;
+
+    OutputDescriptor zc;
+    zc.identifier = "loundless";
+    zc.name = "Integrated loudness";
+    zc.description = "Integrated loudness";
+    zc.unit = "LUFS";
+    zc.hasFixedBinCount = true;
+    zc.binCount = 0;
+    zc.hasKnownExtents = false;
+    zc.isQuantized = false;
+    zc.sampleType = OutputDescriptor::OneSamplePerStep;
+    list.push_back(zc);
+
+    zc.identifier = "range";
+    zc.name = "Integrated loudness Range";
+    zc.description = "Dynamic Range of the audio";
+    zc.unit = "LU";
+    zc.hasFixedBinCount = true;
+    zc.binCount = 0;
+    zc.hasKnownExtents = false;
+    zc.isQuantized = false;
+    zc.sampleType = OutputDescriptor::OneSamplePerStep;
+    list.push_back(zc);
+
+    return list;
+}
+
+VampEBUr128::FeatureSet
+VampEBUr128::process(const float *const *inputBuffers,
+                      Vamp::RealTime timestamp)
+{
+    if (m_stepSize == 0) {
+	cerr << "ERROR: VampEBUr128::process: "
+	     << "VampEBUr128 has not been initialised"
+	     << endl;
+	return FeatureSet();
+    }
+
+    ebu.integr_start (); // noop if already started
+    ebu.process (m_stepSize, inputBuffers);
+
+    return FeatureSet();
+}
+
+VampEBUr128::FeatureSet
+VampEBUr128::getRemainingFeatures()
+{
+    FeatureSet returnFeatures;
+
+    Feature loudness;
+    loudness.hasTimestamp = false;
+    loudness.values.push_back(ebu.integrated());
+    returnFeatures[0].push_back(loudness);
+
+    Feature range;
+    range.hasTimestamp = false;
+    range.values.push_back(ebu.range_max () - ebu.range_min ());
+    returnFeatures[1].push_back(range);
+
+    return returnFeatures;
+}