Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/include/fx/FaderReader.h

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+/*******************************************************************************
+ * 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.
+ ******************************************************************************/
+
+#pragma once
+
+/**
+ * @file FaderReader.h
+ * @ingroup fx
+ * Defines the FaderReader class as well as the two fading types.
+ */
+
+#include "fx/EffectReader.h"
+
+AUD_NAMESPACE_BEGIN
+
+/// Fading types.
+enum FadeType
+{
+	FADE_IN,
+	FADE_OUT
+};
+
+/**
+ * This class fades another reader.
+ * If the fading type is FADE_IN, everything before the fading start will be
+ * silenced, for FADE_OUT that's true for everything after fading ends.
+ */
+class AUD_API FaderReader : public EffectReader
+{
+private:
+	/**
+	 * The fading type.
+	 */
+	const FadeType m_type;
+
+	/**
+	 * The fading start.
+	 */
+	const double m_start;
+
+	/**
+	 * The fading length.
+	 */
+	const double m_length;
+
+	// delete copy constructor and operator=
+	FaderReader(const FaderReader&) = delete;
+	FaderReader& operator=(const FaderReader&) = delete;
+
+public:
+	/**
+	 * Creates a new fader reader.
+	 * \param reader The reader that this effect is applied on.
+	 * \param type The fading type.
+	 * \param start The time where fading should start in seconds.
+	 * \param length How long fading should last in seconds.
+	 */
+	FaderReader(std::shared_ptr<IReader> reader, FadeType type,
+					double start,double length);
+
+	virtual void read(int& length, bool& eos, sample_t* buffer);
+};
+
+AUD_NAMESPACE_END