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

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#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/stereo_panner.h"

#include <algorithm>
#include <memory>

#include "base/memory/ptr_util.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/wtf/math_extras.h"
#include "third_party/fdlibm/ieee754.h"

namespace blink {

// Implement equal-power panning algorithm for mono or stereo input.
// See: http://webaudio.github.io/web-audio-api/#panning-algorithm

StereoPanner::StereoPanner(float sample_rate) { … }

void StereoPanner::PanWithSampleAccurateValues(const AudioBus* input_bus,
                                               AudioBus* output_bus,
                                               const float* pan_values,
                                               uint32_t frames_to_process) { … }

void StereoPanner::PanToTargetValue(const AudioBus* input_bus,
                                    AudioBus* output_bus,
                                    float pan_value,
                                    uint32_t frames_to_process) { … }

}  // namespace blink