/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim:set ts=2 sw=2 sts=2 et cindent: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef AnalyserNode_h_ #define AnalyserNode_h_ #include "AudioNode.h" #include "FFTBlock.h" #include "AlignedTArray.h" namespace mozilla { namespace dom { class AudioContext; class AnalyserNode final : public AudioNode { public: explicit AnalyserNode(AudioContext* aContext); NS_DECL_ISUPPORTS_INHERITED virtual JSObject* WrapObject(JSContext* aCx, JS::Handle aGivenProto) override; void GetFloatFrequencyData(const Float32Array& aArray); void GetByteFrequencyData(const Uint8Array& aArray); void GetFloatTimeDomainData(const Float32Array& aArray); void GetByteTimeDomainData(const Uint8Array& aArray); uint32_t FftSize() const { return mAnalysisBlock.FFTSize(); } void SetFftSize(uint32_t aValue, ErrorResult& aRv); uint32_t FrequencyBinCount() const { return FftSize() / 2; } double MinDecibels() const { return mMinDecibels; } void SetMinDecibels(double aValue, ErrorResult& aRv); double MaxDecibels() const { return mMaxDecibels; } void SetMaxDecibels(double aValue, ErrorResult& aRv); double SmoothingTimeConstant() const { return mSmoothingTimeConstant; } void SetSmoothingTimeConstant(double aValue, ErrorResult& aRv); virtual const char* NodeType() const override { return "AnalyserNode"; } virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override; virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override; protected: ~AnalyserNode() {} private: friend class AnalyserNodeEngine; void AppendChunk(const AudioChunk& aChunk); bool AllocateBuffer(); bool FFTAnalysis(); void ApplyBlackmanWindow(float* aBuffer, uint32_t aSize); void GetTimeDomainData(float* aData, size_t aLength); private: FFTBlock mAnalysisBlock; nsTArray mChunks; double mMinDecibels; double mMaxDecibels; double mSmoothingTimeConstant; size_t mCurrentChunk = 0; AlignedTArray mOutputBuffer; }; } // namespace dom } // namespace mozilla #endif