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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_ANALYSER_HANDLER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_ANALYSER_HANDLER_H_
#include "third_party/blink/renderer/core/typed_arrays/dom_typed_array.h"
#include "third_party/blink/renderer/modules/webaudio/audio_handler.h"
#include "third_party/blink/renderer/modules/webaudio/realtime_analyser.h"
namespace blink {
class AudioNode;
class ExceptionState;
class AnalyserHandler final : public AudioHandler {
public:
static scoped_refptr<AnalyserHandler> Create(AudioNode&, float sample_rate);
~AnalyserHandler() override;
unsigned FftSize() const { return analyser_.FftSize(); }
void SetFftSize(unsigned size, ExceptionState&);
unsigned FrequencyBinCount() const { return analyser_.FrequencyBinCount(); }
double MinDecibels() const { return analyser_.MinDecibels(); }
void SetMinDecibels(double k, ExceptionState&);
double MaxDecibels() const { return analyser_.MaxDecibels(); }
void SetMaxDecibels(double k, ExceptionState&);
void SetMinMaxDecibels(double min, double max, ExceptionState&);
double SmoothingTimeConstant() const {
return analyser_.SmoothingTimeConstant();
}
void SetSmoothingTimeConstant(double k, ExceptionState&);
void GetFloatFrequencyData(DOMFloat32Array* array, double current_time) {
analyser_.GetFloatFrequencyData(array, current_time);
}
void GetByteFrequencyData(DOMUint8Array* array, double current_time) {
analyser_.GetByteFrequencyData(array, current_time);
}
void GetFloatTimeDomainData(DOMFloat32Array* array) {
analyser_.GetFloatTimeDomainData(array);
}
void GetByteTimeDomainData(DOMUint8Array* array) {
analyser_.GetByteTimeDomainData(array);
}
private:
AnalyserHandler(AudioNode&, float sample_rate);
// AudioHandler
void Process(uint32_t frames_to_process) override;
void CheckNumberOfChannelsForInput(AudioNodeInput*) override;
bool RequiresTailProcessing() const override;
double TailTime() const override;
double LatencyTime() const override { return 0; }
bool PropagatesSilence() const override {
// An AnalyserNode does actually propagate silence, but to get the
// time and FFT data updated correctly, process() needs to be
// called even if all the inputs are silent.
return false;
}
void PullInputs(uint32_t frames_to_process) override;
void UpdatePullStatusIfNeeded() override;
RealtimeAnalyser analyser_;
// When setting to true, handler will be pulled automatically by
// BaseAudioContext before the end of each render quantum.
bool need_automatic_pull_ = false;
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBAUDIO_ANALYSER_HANDLER_H_
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