Double trigger filter.doubletriggerfilter

4 files changed, 125 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index f2a392d..428b8d7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -45,6 +45,7 @@ libdg_la_SOURCES = \
 	configparser.cc \
 	directory.cc \
 	domloader.cc \
+	doubletriggerfilter.cc \
 	dgxmlparser.cc \
 	drumgizmo.cc \
 	drumgizmoconf.cc \
@@ -95,6 +96,7 @@ EXTRA_DIST = \
 	cpp11fix.h \
 	dgxmlparser.h \
 	domloader.h \
+	doubletriggerfilter.h \
 	drumgizmo.h \
 	drumgizmoconf.h \
 	drumkit.h \
diff --git a/src/doubletriggerfilter.cc b/src/doubletriggerfilter.cc
new file mode 100644
index 0000000..77ba02d
--- /dev/null
+++ b/src/doubletriggerfilter.cc
@@ -0,0 +1,75 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            doubletriggerfilter.cc
+ *
+ *  Fri Jun  5 18:26:32 CEST 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "doubletriggerfilter.h"
+
+#include "latencyfilter.h"
+
+#include <cmath>
+#include <hugin.hpp>
+
+#include "settings.h"
+#include "random.h"
+
+DoubleTriggerFilter::DoubleTriggerFilter(Settings& settings)
+	: settings(settings)
+{
+	lastStrokes.resize(127, 0.0); // initialise to all zeros
+}
+
+template<typename T1, typename T2>
+static T1 getDistanceSamples(T1 min_dist_ms, T2 samplerate)
+{
+	return min_dist_ms * samplerate / 1000.;
+}
+
+bool DoubleTriggerFilter::filter(event_t& event, std::size_t pos)
+{
+	auto enabled = true;//settings.enable_latency_modifier.load();
+	auto min_dist_ms = 25.0;//settings.latency_max_ms.load();
+	auto samplerate = settings.samplerate.load();
+
+	if(!enabled)
+	{
+		return true;
+	}
+
+	auto min_dist = getDistanceSamples(min_dist_ms, samplerate);
+	double note_pos = pos + event.offset;
+	if(event.instrument >= lastStrokes.size())
+	{
+		lastStrokes.resize(event.instrument, 0.0); // expand and initialise to zeros
+	}
+
+	auto lastStroke = lastStrokes[event.instrument];
+	if((note_pos - lastStroke) > min_dist)
+	{
+		lastStrokes[event.instrument] = note_pos;
+		return true;
+	}
+
+	return false;
+}
diff --git a/src/doubletriggerfilter.h b/src/doubletriggerfilter.h
new file mode 100644
index 0000000..226bc2b
--- /dev/null
+++ b/src/doubletriggerfilter.h
@@ -0,0 +1,46 @@
+/* -*- Mode: c++ -*- */
+/***************************************************************************
+ *            doubletriggerfilter.h
+ *
+ *  Fri Jun  5 18:26:32 CEST 2020
+ *  Copyright 2020 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#pragma once
+
+#include <vector>
+
+#include "inputfilter.h"
+
+struct Settings;
+
+class DoubleTriggerFilter
+	: public InputFilter
+{
+public:
+	DoubleTriggerFilter(Settings& settings);
+
+	bool filter(event_t& events, std::size_t pos) override;
+
+private:
+	Settings& settings;
+	std::vector<double> lastStrokes;
+};
diff --git a/src/inputprocessor.cc b/src/inputprocessor.cc
index 2da5dbc..dcbc283 100644
--- a/src/inputprocessor.cc
+++ b/src/inputprocessor.cc
@@ -36,6 +36,7 @@
 #include "powermapfilter.h"
 #include "staminafilter.h"
 #include "velocityfilter.h"
+#include "doubletriggerfilter.h"
 
 #include "cpp11fix.h"
 
@@ -88,6 +89,7 @@ InputProcessor::InputProcessor(Settings& settings,
 	, settings(settings)
 {
 	// Build filter list
+	filters.emplace_back(std::make_unique<DoubleTriggerFilter>(settings));
 	filters.emplace_back(std::make_unique<PowermapFilter>(settings));
 	filters.emplace_back(std::make_unique<VelocityStorer>(original_velocity));
 	filters.emplace_back(std::make_unique<StaminaFilter>(settings));