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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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