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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 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
| (...skipping 30 matching lines...) Expand all Loading... |
| 41 namespace WebCore { | 41 namespace WebCore { |
| 42 | 42 |
| 43 // A basic biquad (two-zero / two-pole digital filter) | 43 // A basic biquad (two-zero / two-pole digital filter) |
| 44 // | 44 // |
| 45 // It can be configured to a number of common and very useful filters: | 45 // It can be configured to a number of common and very useful filters: |
| 46 // lowpass, highpass, shelving, parameteric, notch, allpass, ... | 46 // lowpass, highpass, shelving, parameteric, notch, allpass, ... |
| 47 | 47 |
| 48 class PLATFORM_EXPORT Biquad { | 48 class PLATFORM_EXPORT Biquad { |
| 49 public: | 49 public: |
| 50 Biquad(); | 50 Biquad(); |
| 51 virtual ~Biquad(); | 51 ~Biquad(); |
| 52 | 52 |
| 53 void process(const float* sourceP, float* destP, size_t framesToProcess); | 53 void process(const float* sourceP, float* destP, size_t framesToProcess); |
| 54 | 54 |
| 55 // frequency is 0 - 1 normalized, resonance and dbGain are in decibels. | 55 // frequency is 0 - 1 normalized, resonance and dbGain are in decibels. |
| 56 // Q is a unitless quality factor. | 56 // Q is a unitless quality factor. |
| 57 void setLowpassParams(double frequency, double resonance); | 57 void setLowpassParams(double frequency, double resonance); |
| 58 void setHighpassParams(double frequency, double resonance); | 58 void setHighpassParams(double frequency, double resonance); |
| 59 void setBandpassParams(double frequency, double Q); | 59 void setBandpassParams(double frequency, double Q); |
| 60 void setLowShelfParams(double frequency, double dbGain); | 60 void setLowShelfParams(double frequency, double dbGain); |
| 61 void setHighShelfParams(double frequency, double dbGain); | 61 void setHighShelfParams(double frequency, double dbGain); |
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| 109 double m_x1; // input delayed by 1 sample | 109 double m_x1; // input delayed by 1 sample |
| 110 double m_x2; // input delayed by 2 samples | 110 double m_x2; // input delayed by 2 samples |
| 111 double m_y1; // output delayed by 1 sample | 111 double m_y1; // output delayed by 1 sample |
| 112 double m_y2; // output delayed by 2 samples | 112 double m_y2; // output delayed by 2 samples |
| 113 #endif | 113 #endif |
| 114 }; | 114 }; |
| 115 | 115 |
| 116 } // namespace WebCore | 116 } // namespace WebCore |
| 117 | 117 |
| 118 #endif // Biquad_h | 118 #endif // Biquad_h |
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Chromium Code Reviews
Issue 45143002:
Devirtualize Biquad's destructor (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master