content/media/webaudio/AnalyserNode.h@b8a032363ba2 (annotated)
content/media/webaudio/AnalyserNode.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef AnalyserNode_h_ |
| michael@0 | 8 | #define AnalyserNode_h_ |
| michael@0 | 9 | |
| michael@0 | 10 | #include "AudioNode.h" |
| michael@0 | 11 | #include "FFTBlock.h" |
| michael@0 | 12 | |
| michael@0 | 13 | namespace mozilla { |
| michael@0 | 14 | namespace dom { |
| michael@0 | 15 | |
| michael@0 | 16 | class AudioContext; |
| michael@0 | 17 | |
| michael@0 | 18 | class AnalyserNode : public AudioNode |
| michael@0 | 19 | { |
| michael@0 | 20 | public: |
| michael@0 | 21 | explicit AnalyserNode(AudioContext* aContext); |
| michael@0 | 22 | |
| michael@0 | 23 | NS_DECL_ISUPPORTS_INHERITED |
| michael@0 | 24 | |
| michael@0 | 25 | virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE; |
| michael@0 | 26 | |
| michael@0 | 27 | void GetFloatFrequencyData(const Float32Array& aArray); |
| michael@0 | 28 | void GetByteFrequencyData(const Uint8Array& aArray); |
| michael@0 | 29 | void GetFloatTimeDomainData(const Float32Array& aArray); |
| michael@0 | 30 | void GetByteTimeDomainData(const Uint8Array& aArray); |
| michael@0 | 31 | uint32_t FftSize() const |
| michael@0 | 32 | { |
| michael@0 | 33 | return mAnalysisBlock.FFTSize(); |
| michael@0 | 34 | } |
| michael@0 | 35 | void SetFftSize(uint32_t aValue, ErrorResult& aRv); |
| michael@0 | 36 | uint32_t FrequencyBinCount() const |
| michael@0 | 37 | { |
| michael@0 | 38 | return FftSize() / 2; |
| michael@0 | 39 | } |
| michael@0 | 40 | double MinDecibels() const |
| michael@0 | 41 | { |
| michael@0 | 42 | return mMinDecibels; |
| michael@0 | 43 | } |
| michael@0 | 44 | void SetMinDecibels(double aValue, ErrorResult& aRv); |
| michael@0 | 45 | double MaxDecibels() const |
| michael@0 | 46 | { |
| michael@0 | 47 | return mMaxDecibels; |
| michael@0 | 48 | } |
| michael@0 | 49 | void SetMaxDecibels(double aValue, ErrorResult& aRv); |
| michael@0 | 50 | double SmoothingTimeConstant() const |
| michael@0 | 51 | { |
| michael@0 | 52 | return mSmoothingTimeConstant; |
| michael@0 | 53 | } |
| michael@0 | 54 | void SetSmoothingTimeConstant(double aValue, ErrorResult& aRv); |
| michael@0 | 55 | |
| michael@0 | 56 | virtual const char* NodeType() const |
| michael@0 | 57 | { |
| michael@0 | 58 | return "AnalyserNode"; |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; |
| michael@0 | 62 | virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE; |
| michael@0 | 63 | |
| michael@0 | 64 | private: |
| michael@0 | 65 | friend class AnalyserNodeEngine; |
| michael@0 | 66 | void AppendChunk(const AudioChunk& aChunk); |
| michael@0 | 67 | bool AllocateBuffer(); |
| michael@0 | 68 | bool FFTAnalysis(); |
| michael@0 | 69 | void ApplyBlackmanWindow(float* aBuffer, uint32_t aSize); |
| michael@0 | 70 | |
| michael@0 | 71 | private: |
| michael@0 | 72 | FFTBlock mAnalysisBlock; |
| michael@0 | 73 | double mMinDecibels; |
| michael@0 | 74 | double mMaxDecibels; |
| michael@0 | 75 | double mSmoothingTimeConstant; |
| michael@0 | 76 | uint32_t mWriteIndex; |
| michael@0 | 77 | FallibleTArray<float> mBuffer; |
| michael@0 | 78 | FallibleTArray<float> mOutputBuffer; |
| michael@0 | 79 | }; |
| michael@0 | 80 | |
| michael@0 | 81 | } |
| michael@0 | 82 | } |
| michael@0 | 83 | |
| michael@0 | 84 | #endif |
| michael@0 | 85 |
