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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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| 25 #ifndef BiquadProcessor_h | 25 #ifndef BiquadProcessor_h |
| 26 #define BiquadProcessor_h | 26 #define BiquadProcessor_h |
| 27 | 27 |
| 28 #include "platform/audio/AudioDSPKernel.h" | 28 #include "platform/audio/AudioDSPKernel.h" |
| 29 #include "platform/audio/AudioDSPKernelProcessor.h" | 29 #include "platform/audio/AudioDSPKernelProcessor.h" |
| 30 #include "platform/audio/Biquad.h" | 30 #include "platform/audio/Biquad.h" |
| 31 #include "modules/webaudio/AudioNode.h" | 31 #include "modules/webaudio/AudioNode.h" |
| 32 #include "modules/webaudio/AudioParam.h" | 32 #include "modules/webaudio/AudioParam.h" |
| 33 #include "wtf/RefPtr.h" | 33 #include "wtf/RefPtr.h" |
| 34 | 34 |
| 35 namespace WebCore { | 35 namespace blink { |
| 36 | 36 |
| 37 // BiquadProcessor is an AudioDSPKernelProcessor which uses Biquad objects to im
plement several common filters. | 37 // BiquadProcessor is an AudioDSPKernelProcessor which uses Biquad objects to im
plement several common filters. |
| 38 | 38 |
| 39 class BiquadProcessor FINAL : public AudioDSPKernelProcessor { | 39 class BiquadProcessor FINAL : public AudioDSPKernelProcessor { |
| 40 public: | 40 public: |
| 41 enum FilterType { | 41 enum FilterType { |
| 42 LowPass = 0, | 42 LowPass = 0, |
| 43 HighPass = 1, | 43 HighPass = 1, |
| 44 BandPass = 2, | 44 BandPass = 2, |
| 45 LowShelf = 3, | 45 LowShelf = 3, |
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| 85 RefPtrWillBePersistent<AudioParam> m_parameter3; | 85 RefPtrWillBePersistent<AudioParam> m_parameter3; |
| 86 RefPtrWillBePersistent<AudioParam> m_parameter4; | 86 RefPtrWillBePersistent<AudioParam> m_parameter4; |
| 87 | 87 |
| 88 // so DSP kernels know when to re-compute coefficients | 88 // so DSP kernels know when to re-compute coefficients |
| 89 bool m_filterCoefficientsDirty; | 89 bool m_filterCoefficientsDirty; |
| 90 | 90 |
| 91 // Set to true if any of the filter parameters are sample-accurate. | 91 // Set to true if any of the filter parameters are sample-accurate. |
| 92 bool m_hasSampleAccurateValues; | 92 bool m_hasSampleAccurateValues; |
| 93 }; | 93 }; |
| 94 | 94 |
| 95 } // namespace WebCore | 95 } // namespace blink |
| 96 | 96 |
| 97 #endif // BiquadProcessor_h | 97 #endif // BiquadProcessor_h |
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