The Tor Browser / file comparison
comparison: content/media/webaudio/AnalyserNode.h
content/media/webaudio/AnalyserNode.h
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:a366fc2052f4 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim:set ts=2 sw=2 sts=2 et cindent: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef AnalyserNode_h_ | |
| 8 #define AnalyserNode_h_ | |
| 9 | |
| 10 #include "AudioNode.h" | |
| 11 #include "FFTBlock.h" | |
| 12 | |
| 13 namespace mozilla { | |
| 14 namespace dom { | |
| 15 | |
| 16 class AudioContext; | |
| 17 | |
| 18 class AnalyserNode : public AudioNode | |
| 19 { | |
| 20 public: | |
| 21 explicit AnalyserNode(AudioContext* aContext); | |
| 22 | |
| 23 NS_DECL_ISUPPORTS_INHERITED | |
| 24 | |
| 25 virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE; | |
| 26 | |
| 27 void GetFloatFrequencyData(const Float32Array& aArray); | |
| 28 void GetByteFrequencyData(const Uint8Array& aArray); | |
| 29 void GetFloatTimeDomainData(const Float32Array& aArray); | |
| 30 void GetByteTimeDomainData(const Uint8Array& aArray); | |
| 31 uint32_t FftSize() const | |
| 32 { | |
| 33 return mAnalysisBlock.FFTSize(); | |
| 34 } | |
| 35 void SetFftSize(uint32_t aValue, ErrorResult& aRv); | |
| 36 uint32_t FrequencyBinCount() const | |
| 37 { | |
| 38 return FftSize() / 2; | |
| 39 } | |
| 40 double MinDecibels() const | |
| 41 { | |
| 42 return mMinDecibels; | |
| 43 } | |
| 44 void SetMinDecibels(double aValue, ErrorResult& aRv); | |
| 45 double MaxDecibels() const | |
| 46 { | |
| 47 return mMaxDecibels; | |
| 48 } | |
| 49 void SetMaxDecibels(double aValue, ErrorResult& aRv); | |
| 50 double SmoothingTimeConstant() const | |
| 51 { | |
| 52 return mSmoothingTimeConstant; | |
| 53 } | |
| 54 void SetSmoothingTimeConstant(double aValue, ErrorResult& aRv); | |
| 55 | |
| 56 virtual const char* NodeType() const | |
| 57 { | |
| 58 return "AnalyserNode"; | |
| 59 } | |
| 60 | |
| 61 virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; | |
| 62 virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; | |
| 63 | |
| 64 private: | |
| 65 friend class AnalyserNodeEngine; | |
| 66 void AppendChunk(const AudioChunk& aChunk); | |
| 67 bool AllocateBuffer(); | |
| 68 bool FFTAnalysis(); | |
| 69 void ApplyBlackmanWindow(float* aBuffer, uint32_t aSize); | |
| 70 | |
| 71 private: | |
| 72 FFTBlock mAnalysisBlock; | |
| 73 double mMinDecibels; | |
| 74 double mMaxDecibels; | |
| 75 double mSmoothingTimeConstant; | |
| 76 uint32_t mWriteIndex; | |
| 77 FallibleTArray<float> mBuffer; | |
| 78 FallibleTArray<float> mOutputBuffer; | |
| 79 }; | |
| 80 | |
| 81 } | |
| 82 } | |
| 83 | |
| 84 #endif | |
| 85 |
