/*
 * Copyright (C) 2010, Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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#ifndef EqualPowerPanner_h
#define EqualPowerPanner_h

#include "Panner.h"

namespace WebCore {

// Common type of stereo panner as found in normal audio mixing equipment.

class EqualPowerPanner final : public Panner {
public:
    EqualPowerPanner();

    void pan(double azimuth, double elevation, const AudioBus* inputBus, AudioBus* outputBuf, size_t framesToProcess) final;
    void panWithSampleAccurateValues(double* azimuth, double* elevation, const AudioBus* inputBus, AudioBus* outputBus, size_t framesToProcess) final;

    void reset() override { }

    double tailTime() const override { return 0; }
    double latencyTime() const override { return 0; }
    bool requiresTailProcessing() const final { return false; }

private:
    void calculateDesiredGain(double& desiredGainL, double& desiredGainR, double azimuth, unsigned numberOfChannels);
};

} // namespace WebCore

#endif // EqualPowerPanner_h