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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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