chromium/third_party/blink/renderer/platform/audio/equal_power_panner.cc

/*
 * 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:
 * 1.  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *    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 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 */

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "third_party/blink/renderer/platform/audio/equal_power_panner.h"

#include <algorithm>
#include <cmath>
#include "third_party/blink/renderer/platform/audio/audio_bus.h"
#include "third_party/blink/renderer/platform/audio/audio_utilities.h"
#include "third_party/blink/renderer/platform/wtf/math_extras.h"
#include "third_party/fdlibm/ieee754.h"

namespace blink {

EqualPowerPanner::EqualPowerPanner(float sample_rate) { … }

void EqualPowerPanner::Pan(double azimuth,
                           double /*elevation*/,
                           const AudioBus* input_bus,
                           AudioBus* output_bus,
                           uint32_t frames_to_process,
                           AudioBus::ChannelInterpretation) { … }

void EqualPowerPanner::PanWithSampleAccurateValues(
    double* azimuth,
    double* /*elevation*/,
    const AudioBus* input_bus,
    AudioBus* output_bus,
    uint32_t frames_to_process,
    AudioBus::ChannelInterpretation) { … }

void EqualPowerPanner::CalculateDesiredGain(double& desired_gain_l,
                                            double& desired_gain_r,
                                            double azimuth,
                                            int number_of_input_channels) { … }

}  // namespace blink