Introduced Settings structure

1 files changed, 127 insertions, 0 deletions

diff --git a/src/settings.h b/src/settings.h
new file mode 100644
index 0000000..6396fc4
--- /dev/null
+++ b/src/settings.h
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            settings.h
+ *
+ *  Tue Mar 22 10:59:46 CET 2016
+ *  Copyright 2016 Christian Glöckner
+ *  cgloeckner@freenet.de
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU 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 <atomic>
+#include <cassert>
+
+template <typename T> class SettingRef
+{
+public:
+	SettingRef(std::atomic<T>& value)
+		: value{value}
+		, cache{}
+	{
+		// string isn't lock free either
+		assert((std::is_same<T, std::string>::value || value.is_lock_free()));
+	}
+
+	bool hasChanged()
+	{
+		T tmp = cache;
+		cache.exchange(value);
+		return tmp == cache;
+	}
+
+	T getValue() const
+	{
+		return cache;
+	}
+
+private:
+	std::atomic<T>& value;
+	std::atomic<T> cache;
+};
+
+struct Settings
+{
+	std::atomic<bool> enable_velocity_modifier;
+	std::atomic<float> velocity_modifier_falloff;
+	std::atomic<float> velocity_modifier_weight;
+
+	std::atomic<bool> enable_velocity_randomiser;
+	std::atomic<float> velocity_randomiser_weight;
+
+	std::atomic<int> samplerate;
+
+	std::atomic<bool> enable_resampling;
+};
+
+struct SettingsGetter
+{
+	SettingRef<bool> enable_velocity_modifier;
+	SettingRef<float> velocity_modifier_falloff;
+	SettingRef<float> velocity_modifier_weight;
+
+	SettingRef<bool> enable_velocity_randomiser;
+	SettingRef<float> velocity_randomiser_weight;
+
+	SettingRef<int> samplerate;
+
+	SettingRef<bool> enable_resampling;
+
+	SettingsGetter(Settings& settings)
+		: enable_velocity_modifier{settings.enable_velocity_modifier}
+		, velocity_modifier_falloff{settings.velocity_modifier_falloff}
+		, velocity_modifier_weight{settings.velocity_modifier_weight}
+		, enable_velocity_randomiser{settings.enable_velocity_randomiser}
+		, velocity_randomiser_weight{settings.velocity_randomiser_weight}
+		, samplerate{settings.samplerate}
+		, enable_resampling{settings.enable_resampling}
+	{
+	}
+};
+
+// lovely reminder: NO, GLOCKE. NOOOO!!
+/*
+enum class IntParams {
+    Foo = 0
+};
+
+struct Settings {
+    std::array<std::atomic<int>, 5> ints;
+
+    Settings()
+        : ints{} {
+        //get(IntParams::Foo).store(3);
+    }
+
+    std::atomic<int>& get(IntParams param) {
+        return ints[(size_t)param];
+    }
+};
+
+struct SettingsGetter {
+    std::vector<SettingRef<int>> ints;
+
+    SettingsGetter(Settings& parent) {
+        for (auto& atomic: parent.ints) {
+            ints.emplace_back(atomic);
+        }
+    }
+};
+*/