# HG changeset patch
# User Chris Cannam
# Date 1417700123 0
# Node ID 3f46ce2d287453e4eb878e9488f40ffe8e440f3b
# Parent  6636aca831c082e99c3fc20d1a9b69f04d711e9a
Start MatchPipeline

diff -r 6636aca831c0 -r 3f46ce2d2874 src/MatchPipeline.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/MatchPipeline.cpp	Thu Dec 04 13:35:23 2014 +0000
@@ -0,0 +1,88 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+/*
+    Vamp feature extraction plugin using the MATCH audio alignment
+    algorithm.
+
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2007 Simon Dixon, Chris Cannam and QMUL.
+    
+    This program 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 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#include "MatchPipeline.h"
+
+MatchPipeline::MatchPipeline(FeatureExtractor::Parameters feParams,
+			     FeatureConditioner::Parameters fcParams,
+			     Matcher::Parameters matchParams) :
+    m_fe1(feParams),
+    m_fe2(feParams),
+    m_fc1(fcParams),
+    m_fc2(fcParams),
+    m_pm1(matchParams, 0),
+    m_pm2(matchParams, &m_pm1),
+    m_feeder(&m_pm1, &m_pm2),
+    m_lastFrameIn1(0),
+    m_lastFrameIn2(0),
+    m_frameNo(0)
+{
+    m_pm1.setOtherMatcher(&m_pm2);
+}
+
+MatchPipeline::~MatchPipeline()
+{
+}
+
+void
+MatchPipeline::feedFrequencyDomainAudio(const float *arr1, const float *arr2)
+{
+    feedFeatures(m_fe1.process(arr1), m_fe2.process(arr2));
+}
+
+void
+MatchPipeline::feedFeatures(const vector<double> &f1, const vector<double> &f2)
+{
+    feedConditionedFeatures(m_fc1.process(f1), m_fc2.process(f2));
+}
+
+void
+MatchPipeline::feedConditionedFeatures(const vector<double> &f1, const vector<double> &f2)
+{
+    m_feeder.feed(f1, f2);
+
+    if (aboveThreshold(f1)) m_lastFrameIn1 = m_frameNo;
+    if (aboveThreshold(f2)) m_lastFrameIn2 = m_frameNo;
+
+    ++m_frameNo;
+}
+
+bool
+MatchPipeline::aboveThreshold(const vector<double> &f)
+{
+    double threshold = 1e-4f;
+    double sum = 0.f;
+    for (int i = 0; i < int(f.size()); ++i) {
+        sum += f[i] * f[i];
+    }
+    return (sum >= threshold);
+}
+
+void
+MatchPipeline::finish()
+{
+    m_feeder.finish();
+    getFinder()->setDurations(m_lastFrameIn1, m_lastFrameIn2);
+}
+
+Finder *
+MatchPipeline::getFinder()
+{
+    return m_feeder.getFinder();
+}
+
+
+
+
diff -r 6636aca831c0 -r 3f46ce2d2874 src/MatchPipeline.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/MatchPipeline.h	Thu Dec 04 13:35:23 2014 +0000
@@ -0,0 +1,94 @@
+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+/*
+    Vamp feature extraction plugin using the MATCH audio alignment
+    algorithm.
+
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2007 Simon Dixon, Chris Cannam and QMUL.
+    
+    This program 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 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef MATCH_PIPELINE_H
+#define MATCH_PIPELINE_H
+
+#include "Matcher.h"
+#include "Finder.h"
+#include "FeatureExtractor.h"
+#include "FeatureConditioner.h"
+#include "MatchFeatureFeeder.h"
+
+class MatchPipeline
+{
+public:
+    /**
+     * Pipeline consisting of two Matchers, two FeatureConditioners,
+     * two FeatureExtractors, and a Finder. Features may be inserted
+     * at any point in the pipeline.
+     *
+     * The pipeline goes: 
+     *    Frequency-domain audio
+     *      -> Features
+     *          -> Conditioned features
+     *              -> Matcher
+     */
+    MatchPipeline(FeatureExtractor::Parameters feParams,
+		  FeatureConditioner::Parameters fcParams,
+		  Matcher::Parameters matchParams);
+
+    ~MatchPipeline();
+
+    /**
+     * Feed in data at the first pipeline stage. The input arrays
+     * represent frames of audio from the two different sources. Each
+     * is provided as a single array of alternating real and imaginary
+     * components. 
+     *
+     * Input arrays must have at least 2 * (feParams.fftSize/2 + 1)
+     * elements. The arrays will be passed to FeatureExtractor and
+     * then on into the rest of the pipeline.
+     */
+    void feedFrequencyDomainAudio(const float *arr1, const float *arr2);
+
+    /**
+     * Feed in data at the second pipeline stage. The vectors
+     * represent feature frames from two different sources. They will
+     * be passed in to FeatureConditioner and then on to the rest of
+     * the pipeline.
+     */
+    void feedFeatures(const vector<double> &f1, const vector<double> &f2);
+
+    /**
+     * Feed in data at the third pipeline stage. The vectors represent
+     * conditioned feature frames from two different sources. They
+     * will be passed to MatchFeatureFeeder for feeding to the two
+     * matchers.
+     */
+    void feedConditionedFeatures(const vector<double> &f1, const vector<double> &f2);
+
+    /**
+     * Indicate that both inputs have come to an end.
+     */
+    void finish();
+
+    Finder *getFinder();
+    
+private:
+    FeatureExtractor m_fe1;
+    FeatureExtractor m_fe2;
+    FeatureConditioner m_fc1;
+    FeatureConditioner m_fc2;
+    Matcher m_pm1;
+    Matcher m_pm2;
+    MatchFeatureFeeder m_feeder;
+    int m_lastFrameIn1;
+    int m_lastFrameIn2;
+    int m_frameNo;
+    bool aboveThreshold(const vector<double> &f);
+};
+
+#endif