Add Chromium-only Blender WebEngine parity work

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

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+/*******************************************************************************
+ * Copyright 2022 Marcos Perez Gonzalez
+ *
+ * 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 Equalizer.h
+ * @ingroup fx
+ * The Equalizer class.
+ */
+
+#include <memory>
+#include <vector>
+
+#include "ISound.h"
+#include "ImpulseResponse.h"
+
+AUD_NAMESPACE_BEGIN
+
+class Buffer;
+class ImpulseResponse;
+/**
+ * This class represents a sound that can be modified depending on a given impulse response.
+ */
+class AUD_API Equalizer : public ISound
+{
+private:
+	/**
+	 * A pointer to the imput sound.
+	 */
+	std::shared_ptr<ISound> m_sound;
+
+	/**
+	 * Local definition of Equalizer
+	 */
+	std::shared_ptr<Buffer> m_bufEQ;
+
+	/**
+	 * A pointer to the impulse response.
+	 */
+	std::shared_ptr<ImpulseResponse> m_impulseResponse;
+
+	/**
+	 * delete copy constructor and operator=
+	 */
+	Equalizer(const Equalizer&) = delete;
+	Equalizer& operator=(const Equalizer&) = delete;
+
+	/**
+	 * Create ImpulseResponse from the definition in the Buffer,
+	 * using at the end a minimum phase change
+	 */
+	std::shared_ptr<ImpulseResponse> createImpulseResponse();
+
+	/**
+	 * Create an Impulse Response with minimum phase distortion using Homomorphic
+	 * The input is an Impulse Response
+	 */
+	std::shared_ptr<Buffer> minimumPhaseFilterHomomorphic(std::shared_ptr<Buffer> original, int lOriginal, int lWork);
+
+	/**
+	 * Create an Impulse Response with minimum phase distortion using Hilbert
+	 * The input is an Impulse Response
+	 */
+	std::shared_ptr<Buffer> minimumPhaseFilterHilbert(std::shared_ptr<Buffer> original, int lOriginal, int lWork);
+
+public:
+	/**
+	 * Creates a new Equalizer.
+	 * \param sound The sound that will be equalized
+	 */
+	Equalizer(std::shared_ptr<ISound> sound, std::shared_ptr<Buffer> bufEQ, int externalSizeEq, float maxFreqEq, int sizeConversion);
+
+	virtual ~Equalizer();
+	virtual std::shared_ptr<IReader> createReader();
+
+	/*
+	 * Length of the external equalizer definition. It must be the number of "float" positions of the Buffer
+	 */
+	int external_size_eq;
+
+	/*
+	 * Length of the internal equalizer definition
+	 */
+	int filter_length;
+
+	/*
+	 * Maximum frequency used in the equalizer definition
+	 */
+	float maxFreqEq;
+};
+
+AUD_NAMESPACE_END