171 lines
4.0 KiB
C++
171 lines
4.0 KiB
C++
/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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Vamp
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An API for audio analysis and feature extraction plugins.
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Centre for Digital Music, Queen Mary, University of London.
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Copyright 2006 Chris Cannam.
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation
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files (the "Software"), to deal in the Software without
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restriction, including without limitation the rights to use, copy,
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modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
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CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "EBUr128.h"
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using std::string;
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using std::vector;
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using std::cerr;
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using std::endl;
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VampEBUr128::VampEBUr128(float inputSampleRate)
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: Plugin(inputSampleRate)
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, m_stepSize(0)
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{
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}
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VampEBUr128::~VampEBUr128()
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{
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}
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string
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VampEBUr128::getIdentifier() const
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{
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return "ebur128";
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}
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string
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VampEBUr128::getName() const
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{
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return "EBU R128 Loudness";
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}
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string
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VampEBUr128::getDescription() const
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{
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return "Loudness measurements according to the EBU Recommendation 128";
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}
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string
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VampEBUr128::getMaker() const
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{
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return "Harrison Consoles";
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}
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int
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VampEBUr128::getPluginVersion() const
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{
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return 2;
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}
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string
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VampEBUr128::getCopyright() const
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{
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return "GPL version 2 or later";
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}
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bool
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VampEBUr128::initialise(size_t channels, size_t stepSize, size_t blockSize)
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{
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if (channels < getMinChannelCount() ||
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channels > getMaxChannelCount()) return false;
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m_stepSize = std::min(stepSize, blockSize);
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m_channels = channels;
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ebu.init (m_channels, m_inputSampleRate);
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return true;
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}
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void
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VampEBUr128::reset()
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{
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ebu.reset ();
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}
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VampEBUr128::OutputList
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VampEBUr128::getOutputDescriptors() const
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{
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OutputList list;
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OutputDescriptor zc;
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zc.identifier = "loundless";
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zc.name = "Integrated loudness";
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zc.description = "Integrated loudness";
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zc.unit = "LUFS";
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zc.hasFixedBinCount = true;
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zc.binCount = 0;
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zc.hasKnownExtents = false;
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zc.isQuantized = false;
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zc.sampleType = OutputDescriptor::OneSamplePerStep;
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list.push_back(zc);
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zc.identifier = "range";
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zc.name = "Integrated loudness Range";
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zc.description = "Dynamic Range of the audio";
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zc.unit = "LU";
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zc.hasFixedBinCount = true;
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zc.binCount = 0;
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zc.hasKnownExtents = false;
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zc.isQuantized = false;
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zc.sampleType = OutputDescriptor::OneSamplePerStep;
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list.push_back(zc);
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return list;
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}
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VampEBUr128::FeatureSet
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VampEBUr128::process(const float *const *inputBuffers,
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Vamp::RealTime timestamp)
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{
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if (m_stepSize == 0) {
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cerr << "ERROR: VampEBUr128::process: "
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<< "VampEBUr128 has not been initialised"
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<< endl;
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return FeatureSet();
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}
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ebu.integr_start (); // noop if already started
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ebu.process (m_stepSize, inputBuffers);
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return FeatureSet();
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}
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VampEBUr128::FeatureSet
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VampEBUr128::getRemainingFeatures()
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{
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FeatureSet returnFeatures;
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Feature loudness;
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loudness.hasTimestamp = false;
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loudness.values.push_back(ebu.integrated());
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returnFeatures[0].push_back(loudness);
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Feature range;
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range.hasTimestamp = false;
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range.values.push_back(ebu.range_max () - ebu.range_min ());
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returnFeatures[1].push_back(range);
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return returnFeatures;
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}
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