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1 /* | 1 /* |
2 * Copyright (C) 2011, Google Inc. All rights reserved. | 2 * Copyright (C) 2011, 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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42 BANDPASS = 2, | 42 BANDPASS = 2, |
43 LOWSHELF = 3, | 43 LOWSHELF = 3, |
44 HIGHSHELF = 4, | 44 HIGHSHELF = 4, |
45 PEAKING = 5, | 45 PEAKING = 5, |
46 NOTCH = 6, | 46 NOTCH = 6, |
47 ALLPASS = 7 | 47 ALLPASS = 7 |
48 }; | 48 }; |
49 | 49 |
50 static BiquadFilterNode* create(AudioContext* context, float sampleRate) | 50 static BiquadFilterNode* create(AudioContext* context, float sampleRate) |
51 { | 51 { |
52 return adoptRefCountedGarbageCollectedWillBeNoop(new BiquadFilterNode(co
ntext, sampleRate)); | 52 return new BiquadFilterNode(context, sampleRate); |
53 } | 53 } |
54 | 54 |
55 String type() const; | 55 String type() const; |
56 void setType(const String&); | 56 void setType(const String&); |
57 | 57 |
58 AudioParam* frequency() { return biquadProcessor()->parameter1(); } | 58 AudioParam* frequency() { return biquadProcessor()->parameter1(); } |
59 AudioParam* q() { return biquadProcessor()->parameter2(); } | 59 AudioParam* q() { return biquadProcessor()->parameter2(); } |
60 AudioParam* gain() { return biquadProcessor()->parameter3(); } | 60 AudioParam* gain() { return biquadProcessor()->parameter3(); } |
61 AudioParam* detune() { return biquadProcessor()->parameter4(); } | 61 AudioParam* detune() { return biquadProcessor()->parameter4(); } |
62 | 62 |
63 // Get the magnitude and phase response of the filter at the given | 63 // Get the magnitude and phase response of the filter at the given |
64 // set of frequencies (in Hz). The phase response is in radians. | 64 // set of frequencies (in Hz). The phase response is in radians. |
65 void getFrequencyResponse(const Float32Array* frequencyHz, | 65 void getFrequencyResponse(const Float32Array* frequencyHz, |
66 Float32Array* magResponse, | 66 Float32Array* magResponse, |
67 Float32Array* phaseResponse); | 67 Float32Array* phaseResponse); |
68 | 68 |
69 private: | 69 private: |
70 BiquadFilterNode(AudioContext*, float sampleRate); | 70 BiquadFilterNode(AudioContext*, float sampleRate); |
71 | 71 |
72 BiquadProcessor* biquadProcessor() { return static_cast<BiquadProcessor*>(pr
ocessor()); } | 72 BiquadProcessor* biquadProcessor() { return static_cast<BiquadProcessor*>(pr
ocessor()); } |
73 bool setType(unsigned); // Returns true on success. | 73 bool setType(unsigned); // Returns true on success. |
74 }; | 74 }; |
75 | 75 |
76 } // namespace blink | 76 } // namespace blink |
77 | 77 |
78 #endif // BiquadFilterNode_h | 78 #endif // BiquadFilterNode_h |
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