Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/src/fx/Sum.cpp

@@ -0,0 +1,36 @@
+/*******************************************************************************
+ * Copyright 2009-2016 Jörg Müller
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ ******************************************************************************/
+
+#include "fx/Sum.h"
+#include "fx/IIRFilterReader.h"
+
+AUD_NAMESPACE_BEGIN
+
+Sum::Sum(std::shared_ptr<ISound> sound) :
+		Effect(sound)
+{
+}
+
+std::shared_ptr<IReader> Sum::createReader()
+{
+	std::vector<float> a, b;
+	a.push_back(1);
+	a.push_back(-1);
+	b.push_back(1);
+	return std::shared_ptr<IReader>(new IIRFilterReader(getReader(), b, a));
+}
+
+AUD_NAMESPACE_END