Implement unused Lv2UridCache

src/core/CMakeLists.txt

@@ -98,6 +98,7 @@ set(LMMS_SRCS
 	core/lv2/Lv2Proc.cpp
 	core/lv2/Lv2Manager.cpp
 	core/lv2/Lv2SubPluginFeatures.cpp
+	core/lv2/Lv2UridCache.cpp
 	core/lv2/Lv2UridMap.cpp
 
 	core/midi/MidiAlsaRaw.cpp

src/core/lv2/Lv2Manager.cpp

@@ -44,7 +44,8 @@
 
 
 
-Lv2Manager::Lv2Manager()
+Lv2Manager::Lv2Manager() :
+	m_uridCache(m_uridMap)
 {
 	const char* dbgStr = getenv("LMMS_LV2_DEBUG");
 	m_debug = (dbgStr && *dbgStr);

src/core/lv2/Lv2UridCache.cpp

@@ -0,0 +1,57 @@
+/*
+ * Lv2UridCache.cpp - Lv2UridCache implementation
+ *
+ * Copyright (c) 2020-2020 Johannes Lorenz <jlsf2013$users.sourceforge.net, $=@>
+ *
+ * This file is part of LMMS - https://lmms.io
+ *
+ * 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.
+ *
+ * This program 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 this program (see COPYING); if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include "Lv2UridCache.h"
+
+#ifdef LMMS_HAVE_LV2
+
+#include <lv2/lv2plug.in/ns/ext/midi/midi.h>
+#include <QtGlobal>
+
+#include "Lv2UridMap.h"
+
+uint32_t Lv2UridCache::operator[](Lv2UridCache::Id id) const
+{
+	Q_ASSERT(id != Id::size);
+	return m_cache[static_cast<std::size_t>(id)];
+}
+
+Lv2UridCache::Lv2UridCache(UridMap &mapper)
+{
+	const uint32_t noIdYet = 0;
+	std::fill_n(m_cache, static_cast<std::size_t>(Id::size), noIdYet);
+
+	auto init = [this, &mapper](Id id, const char* uridStr)
+	{
+		m_cache[static_cast<std::size_t>(id)] = mapper.map(uridStr);
+	};
+
+	init(Id::midi_MidiEvent, LV2_MIDI__MidiEvent);
+
+	for(uint32_t urid : m_cache) { Q_ASSERT(urid != noIdYet); }
+}
+
+#endif // LMMS_HAVE_LV2
+
+