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Side by Side Diff: Source/platform/audio/Biquad.cpp

Issue 400543004: Rename WebCore namespace to blink in Platform (Closed) Base URL: svn://svn.chromium.org/blink/trunk
Patch Set: Created 6 years, 5 months ago
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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
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34 34
35 #include <stdio.h> 35 #include <stdio.h>
36 #include <algorithm> 36 #include <algorithm>
37 #include "platform/audio/DenormalDisabler.h" 37 #include "platform/audio/DenormalDisabler.h"
38 #include "wtf/MathExtras.h" 38 #include "wtf/MathExtras.h"
39 39
40 #if OS(MACOSX) 40 #if OS(MACOSX)
41 #include <Accelerate/Accelerate.h> 41 #include <Accelerate/Accelerate.h>
42 #endif 42 #endif
43 43
44 namespace WebCore { 44 namespace blink {
45 45
46 #if OS(MACOSX) 46 #if OS(MACOSX)
47 const int kBufferSize = 1024; 47 const int kBufferSize = 1024;
48 #endif 48 #endif
49 49
50 Biquad::Biquad() 50 Biquad::Biquad()
51 { 51 {
52 #if OS(MACOSX) 52 #if OS(MACOSX)
53 // Allocate two samples more for filter history 53 // Allocate two samples more for filter history
54 m_inputBuffer.allocate(kBufferSize + 2); 54 m_inputBuffer.allocate(kBufferSize + 2);
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577 double omega = -piDouble * frequency[k]; 577 double omega = -piDouble * frequency[k];
578 Complex z = Complex(cos(omega), sin(omega)); 578 Complex z = Complex(cos(omega), sin(omega));
579 Complex numerator = b0 + (b1 + b2 * z) * z; 579 Complex numerator = b0 + (b1 + b2 * z) * z;
580 Complex denominator = Complex(1, 0) + (a1 + a2 * z) * z; 580 Complex denominator = Complex(1, 0) + (a1 + a2 * z) * z;
581 Complex response = numerator / denominator; 581 Complex response = numerator / denominator;
582 magResponse[k] = static_cast<float>(abs(response)); 582 magResponse[k] = static_cast<float>(abs(response));
583 phaseResponse[k] = static_cast<float>(atan2(imag(response), real(respons e))); 583 phaseResponse[k] = static_cast<float>(atan2(imag(response), real(respons e)));
584 } 584 }
585 } 585 }
586 586
587 } // namespace WebCore 587 } // namespace blink
588 588
589 #endif // ENABLE(WEB_AUDIO) 589 #endif // ENABLE(WEB_AUDIO)
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