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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 13 matching lines...) Expand all Loading... |
| 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 */ | 27 */ |
| 28 | 28 |
| 29 #ifndef Biquad_h | 29 #ifndef Biquad_h |
| 30 #define Biquad_h | 30 #define Biquad_h |
| 31 | 31 |
| 32 #include "platform/PlatformExport.h" | 32 #include "platform/PlatformExport.h" |
| 33 #include "platform/audio/AudioArray.h" | 33 #include "platform/audio/AudioArray.h" |
| 34 #include "wtf/Complex.h" | 34 #include <complex> |
| 35 #include <sys/types.h> | 35 #include <sys/types.h> |
| 36 | 36 |
| 37 #if USE(WEBAUDIO_IPP) | 37 #if USE(WEBAUDIO_IPP) |
| 38 #include <ipps.h> | 38 #include <ipps.h> |
| 39 #endif // USE(WEBAUDIO_IPP) | 39 #endif // USE(WEBAUDIO_IPP) |
| 40 | 40 |
| 41 namespace blink { | 41 namespace blink { |
| 42 | 42 |
| 43 // A basic biquad (two-zero / two-pole digital filter) | 43 // A basic biquad (two-zero / two-pole digital filter) |
| 44 // | 44 // |
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| 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); |
| 62 void setPeakingParams(double frequency, double Q, double dbGain); | 62 void setPeakingParams(double frequency, double Q, double dbGain); |
| 63 void setAllpassParams(double frequency, double Q); | 63 void setAllpassParams(double frequency, double Q); |
| 64 void setNotchParams(double frequency, double Q); | 64 void setNotchParams(double frequency, double Q); |
| 65 | 65 |
| 66 // Set the biquad coefficients given a single zero (other zero will be conju
gate) | 66 // Set the biquad coefficients given a single zero (other zero will be conju
gate) |
| 67 // and a single pole (other pole will be conjugate) | 67 // and a single pole (other pole will be conjugate) |
| 68 void setZeroPolePairs(const Complex& zero, const Complex& pole); | 68 void setZeroPolePairs(const std::complex<double>& zero, const std::complex<d
ouble>& pole); |
| 69 | 69 |
| 70 // Set the biquad coefficients given a single pole (other pole will be conju
gate) | 70 // Set the biquad coefficients given a single pole (other pole will be conju
gate) |
| 71 // (The zeroes will be the inverse of the poles) | 71 // (The zeroes will be the inverse of the poles) |
| 72 void setAllpassPole(const Complex& pole); | 72 void setAllpassPole(const std::complex<double>&); |
| 73 | 73 |
| 74 // Resets filter state | 74 // Resets filter state |
| 75 void reset(); | 75 void reset(); |
| 76 | 76 |
| 77 // Filter response at a set of n frequencies. The magnitude and | 77 // Filter response at a set of n frequencies. The magnitude and |
| 78 // phase response are returned in magResponse and phaseResponse. | 78 // phase response are returned in magResponse and phaseResponse. |
| 79 // The phase response is in radians. | 79 // The phase response is in radians. |
| 80 void getFrequencyResponse(int nFrequencies, | 80 void getFrequencyResponse(int nFrequencies, |
| 81 const float* frequency, | 81 const float* frequency, |
| 82 float* magResponse, | 82 float* magResponse, |
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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 blink | 116 } // namespace blink |
| 117 | 117 |
| 118 #endif // Biquad_h | 118 #endif // Biquad_h |
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