hrtf_panner.cc | Explore in Territory

/*
 * 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
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

#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/hrtf_panner.h"

#include "base/memory/scoped_refptr.h"
#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/audio/fft_frame.h"
#include "third_party/blink/renderer/platform/audio/hrtf_database.h"
#include "third_party/blink/renderer/platform/audio/hrtf_database_loader.h"
#include "third_party/blink/renderer/platform/wtf/math_extras.h"

namespace blink {

namespace {

// The value of 2 milliseconds is larger than the largest delay which exists in
// any HRTFKernel from the default HRTFDatabase (0.0136 seconds).
// We ASSERT the delay values used in process() with this value.
constexpr double kMaxDelayTimeSeconds = …;

constexpr int kUninitializedAzimuth = …;

// Given an azimuth angle in the range -180 -> +180, returns the corresponding
// azimuth index for the database, and azimuthBlend which is an interpolation
// value from 0 -> 1.
int CalculateDesiredAzimuthIndexAndBlend(double azimuth,
                                         double& azimuth_blend) { … }

}  // namespace

HRTFPanner::HRTFPanner(float sample_rate,
                       unsigned render_quantum_frames,
                       HRTFDatabaseLoader* database_loader)
    : … { … }

HRTFPanner::~HRTFPanner() = default;

unsigned HRTFPanner::FftSizeForSampleRate(float sample_rate) { … }

void HRTFPanner::Reset() { … }

void HRTFPanner::Pan(double desired_azimuth,
                     double elevation,
                     const AudioBus* input_bus,
                     AudioBus* output_bus,
                     uint32_t frames_to_process,
                     AudioBus::ChannelInterpretation channel_interpretation) { … }

void HRTFPanner::PanWithSampleAccurateValues(
    double* desired_azimuth,
    double* elevation,
    const AudioBus* input_bus,
    AudioBus* output_bus,
    uint32_t frames_to_process,
    AudioBus::ChannelInterpretation channel_interpretation) { … }

bool HRTFPanner::RequiresTailProcessing() const { … }

double HRTFPanner::TailTime() const { … }

double HRTFPanner::LatencyTime() const { … }

}  // namespace blink
chromium/third_party/blink/renderer/platform/audio/hrtf_panner.cc
