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1 /* | 1 /* |
2 * Copyright (C) 2010, Google Inc. All rights reserved. | 2 * Copyright (C) 2010, 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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29 #include "modules/webaudio/AudioNode.h" | 29 #include "modules/webaudio/AudioNode.h" |
30 #include "modules/webaudio/AudioParam.h" | 30 #include "modules/webaudio/AudioParam.h" |
31 #include "platform/audio/AudioDSPKernel.h" | 31 #include "platform/audio/AudioDSPKernel.h" |
32 #include "platform/audio/AudioDSPKernelProcessor.h" | 32 #include "platform/audio/AudioDSPKernelProcessor.h" |
33 #include "platform/audio/Biquad.h" | 33 #include "platform/audio/Biquad.h" |
34 #include "wtf/RefPtr.h" | 34 #include "wtf/RefPtr.h" |
35 #include <memory> | 35 #include <memory> |
36 | 36 |
37 namespace blink { | 37 namespace blink { |
38 | 38 |
39 // BiquadProcessor is an AudioDSPKernelProcessor which uses Biquad objects to im
plement several common filters. | 39 // BiquadProcessor is an AudioDSPKernelProcessor which uses Biquad objects to |
| 40 // implement several common filters. |
40 | 41 |
41 class BiquadProcessor final : public AudioDSPKernelProcessor { | 42 class BiquadProcessor final : public AudioDSPKernelProcessor { |
42 public: | 43 public: |
43 // This values are used in histograms and should not be renumbered or deleted. | 44 // This values are used in histograms and should not be renumbered or deleted. |
44 enum FilterType { | 45 enum FilterType { |
45 LowPass = 0, | 46 LowPass = 0, |
46 HighPass = 1, | 47 HighPass = 1, |
47 BandPass = 2, | 48 BandPass = 2, |
48 LowShelf = 3, | 49 LowShelf = 3, |
49 HighShelf = 4, | 50 HighShelf = 4, |
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97 // so DSP kernels know when to re-compute coefficients | 98 // so DSP kernels know when to re-compute coefficients |
98 bool m_filterCoefficientsDirty; | 99 bool m_filterCoefficientsDirty; |
99 | 100 |
100 // Set to true if any of the filter parameters are sample-accurate. | 101 // Set to true if any of the filter parameters are sample-accurate. |
101 bool m_hasSampleAccurateValues; | 102 bool m_hasSampleAccurateValues; |
102 }; | 103 }; |
103 | 104 |
104 } // namespace blink | 105 } // namespace blink |
105 | 106 |
106 #endif // BiquadProcessor_h | 107 #endif // BiquadProcessor_h |
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