From 68e943265edf04e63a8e8b8f62bab20f99d9c637 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Wed, 10 Sep 2008 15:03:30 +0000
Subject: merge from 2.0-ongoing @ 3581

git-svn-id: svn://localhost/ardour2/branches/3.0@3711 d708f5d6-7413-0410-9779-e7cbd77b26cf
---
 libs/ardour/onset_detector.cc | 126 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 libs/ardour/onset_detector.cc

(limited to 'libs/ardour/onset_detector.cc')

diff --git a/libs/ardour/onset_detector.cc b/libs/ardour/onset_detector.cc
new file mode 100644
index 0000000000..f58e64ad4a
--- /dev/null
+++ b/libs/ardour/onset_detector.cc
@@ -0,0 +1,126 @@
+#include <ardour/onset_detector.h>
+
+#include "i18n.h"
+
+using namespace Vamp;
+using namespace ARDOUR;
+using namespace std;
+
+/* need a static initializer function for this */
+
+string OnsetDetector::_op_id = X_("libardourvampplugins:aubioonset:2");
+
+OnsetDetector::OnsetDetector (float sr)
+	: AudioAnalyser (sr, X_("libardourvampplugins:aubioonset"))
+{
+	/* update the op_id */
+
+	_op_id = X_("libardourvampplugins:aubioonset");
+	
+	// XXX this should load the above-named plugin and get the current version
+	
+	_op_id += ":2";
+}
+
+OnsetDetector::~OnsetDetector()
+{
+}
+
+string
+OnsetDetector::operational_identifier()
+{
+	return _op_id;
+}
+
+int
+OnsetDetector::run (const std::string& path, Readable* src, uint32_t channel, AnalysisFeatureList& results)
+{
+	current_results = &results;
+	int ret = analyse (path, src, channel);
+
+	current_results = 0;
+	return ret;
+}
+
+int
+OnsetDetector::use_features (Plugin::FeatureSet& features, ostream* out)
+{
+	const Plugin::FeatureList& fl (features[0]);
+
+	for (Plugin::FeatureList::const_iterator f = fl.begin(); f != fl.end(); ++f) {
+		
+		if ((*f).hasTimestamp) {
+
+			if (out) {
+				(*out) << (*f).timestamp.toString() << endl;
+			} 
+			
+			current_results->push_back (RealTime::realTime2Frame ((*f).timestamp, (nframes_t) floor(sample_rate)));
+		}
+	}
+
+	return 0;
+}
+
+void
+OnsetDetector::set_silence_threshold (float val)
+{
+	if (plugin) {
+		plugin->setParameter ("silencethreshold", val);
+	}
+}
+
+void
+OnsetDetector::set_peak_threshold (float val)
+{
+	if (plugin) {
+		plugin->setParameter ("peakpickthreshold", val);
+	}
+}
+
+void
+OnsetDetector::set_function (int val)
+{
+	if (plugin) {
+		plugin->setParameter ("onsettype", (float) val);
+	}
+}
+
+void
+OnsetDetector::cleanup_onsets (AnalysisFeatureList& t, float sr, float gap_msecs)
+{
+	if (t.empty()) {
+		return;
+	}
+
+	t.sort ();
+	
+	/* remove duplicates or other things that are too close */
+	
+	AnalysisFeatureList::iterator i = t.begin();
+	AnalysisFeatureList::iterator f, b;
+	const nframes64_t gap_frames = (nframes64_t) floor (gap_msecs * (sr / 1000.0));
+	
+	while (i != t.end()) {
+
+		// move front iterator to just past i, and back iterator the same place
+		
+		f = i;
+		++f;
+		b = f;
+
+		// move f until we find a new value that is far enough away
+		
+		while ((f != t.end()) && (((*f) - (*i)) < gap_frames)) {
+			++f;
+		}
+
+		i = f;
+
+		// if f moved forward from b, we had duplicates/too-close points: get rid of them
+
+		if (b != f) {
+			t.erase (b, f);
+		}
+	}
+}
-- 
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