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Side by Side Diff: Source/modules/webaudio/WaveShaperProcessor.h

Issue 15619003: Add support for WaveShaperNode.oversample (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: change TestExpectations in middle of file Created 7 years, 6 months ago
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1 /* 1 /*
2 * Copyright (C) 2011, Google Inc. All rights reserved. 2 * Copyright (C) 2011, Google Inc. All rights reserved.
3 * 3 *
4 * Redistribution and use in source and binary forms, with or without 4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions 5 * modification, are permitted provided that the following conditions
6 * are met: 6 * are met:
7 * 1. Redistributions of source code must retain the above copyright 7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer. 8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright 9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the 10 * notice, this list of conditions and the following disclaimer in the
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31 #include "wtf/Float32Array.h" 31 #include "wtf/Float32Array.h"
32 #include "wtf/RefPtr.h" 32 #include "wtf/RefPtr.h"
33 #include "wtf/Threading.h" 33 #include "wtf/Threading.h"
34 34
35 namespace WebCore { 35 namespace WebCore {
36 36
37 // WaveShaperProcessor is an AudioDSPKernelProcessor which uses WaveShaperDSPKer nel objects to implement non-linear distortion effects. 37 // WaveShaperProcessor is an AudioDSPKernelProcessor which uses WaveShaperDSPKer nel objects to implement non-linear distortion effects.
38 38
39 class WaveShaperProcessor : public AudioDSPKernelProcessor { 39 class WaveShaperProcessor : public AudioDSPKernelProcessor {
40 public: 40 public:
41 enum OverSampleType {
42 OverSampleNone,
43 OverSample2x,
44 OverSample4x
45 };
46
41 WaveShaperProcessor(float sampleRate, size_t numberOfChannels); 47 WaveShaperProcessor(float sampleRate, size_t numberOfChannels);
42 48
43 virtual ~WaveShaperProcessor(); 49 virtual ~WaveShaperProcessor();
44 50
45 virtual PassOwnPtr<AudioDSPKernel> createKernel(); 51 virtual PassOwnPtr<AudioDSPKernel> createKernel();
46 52
47 virtual void process(const AudioBus* source, AudioBus* destination, size_t f ramesToProcess); 53 virtual void process(const AudioBus* source, AudioBus* destination, size_t f ramesToProcess);
48 54
49 void setCurve(Float32Array*); 55 void setCurve(Float32Array*);
50 Float32Array* curve() { return m_curve.get(); } 56 Float32Array* curve() { return m_curve.get(); }
51 57
58 void setOversample(OverSampleType);
59 OverSampleType oversample() const { return m_oversample; }
60
52 private: 61 private:
53 // m_curve represents the non-linear shaping curve. 62 // m_curve represents the non-linear shaping curve.
54 RefPtr<Float32Array> m_curve; 63 RefPtr<Float32Array> m_curve;
55 64
65 OverSampleType m_oversample;
66
56 // This synchronizes process() with setCurve(). 67 // This synchronizes process() with setCurve().
57 mutable Mutex m_processLock; 68 mutable Mutex m_processLock;
58 }; 69 };
59 70
60 } // namespace WebCore 71 } // namespace WebCore
61 72
62 #endif // WaveShaperProcessor_h 73 #endif // WaveShaperProcessor_h
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