Add Chromium-only Blender WebEngine parity work

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

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+/*******************************************************************************
+ * Copyright 2009-2025 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 TimeStretchPitchScale.h
+ * @ingroup fx
+ * The TimeStretchPitchScale class.
+ */
+
+#include "fx/Effect.h"
+
+AUD_NAMESPACE_BEGIN
+
+enum class StretcherQuality
+{
+	HIGH = 0,      // Prioritize high-quality pitch processing
+	FAST = 1,      // Prioritize speed over audio quality
+	CONSISTENT = 2 // Prioritize consistency for dynamic pitch changes
+};
+
+/**
+ * This sound allows a sound to be time-stretched and pitch scaled.
+ * \note The reader has to be seekable.
+ */
+class AUD_API TimeStretchPitchScale : public Effect
+{
+private:
+	/**
+	 * The factor by which to stretch or compress time.
+	 */
+	double m_timeRatio;
+
+	/**
+	 * The factor by which to adjust the pitch.
+	 */
+	double m_pitchScale;
+
+	/**
+	 * Rubberband stretcher quality.
+	 */
+	StretcherQuality m_quality;
+
+	/**
+	 * Whether to preserve the vocal formants during pitch-shifting
+	 */
+	bool m_preserveFormant;
+
+	// delete copy constructor and operator=
+	TimeStretchPitchScale(const TimeStretchPitchScale&) = delete;
+	TimeStretchPitchScale& operator=(const TimeStretchPitchScale&) = delete;
+
+public:
+	/**
+	 * Creates a new time-stretch, pitch scaled sound.
+	 * \param sound The input sound.
+	 * \param timeRatio The factor by which to stretch or compress time.
+	 * \param pitchScale The factor by which to adjust the pitch.
+	 * \param quality The processing quality level.
+	 * \param preserveFormant Whether to preserve the vocal formants for the stretcher.
+	 */
+	TimeStretchPitchScale(std::shared_ptr<ISound> sound, double timeRatio, double pitchScale, StretcherQuality quality, bool preserveFormant);
+
+	/**
+	 * Returns the time ratio.
+	 */
+	double getTimeRatio() const;
+
+	/**
+	 * Returns the pitch scale.
+	 */
+	double getPitchScale() const;
+
+	/**
+	 * Returns whether formant preservation is enabled.
+	 */
+	bool getPreserveFormant() const;
+
+	/**
+	 * Returns the quality of the stretcher.
+	 */
+	StretcherQuality getStretcherQuality() const;
+
+	virtual std::shared_ptr<IReader> createReader();
+};
+
+AUD_NAMESPACE_END