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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 |
11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
12 * | 12 * |
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND | 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND |
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
16 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE | 16 * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE |
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | 19 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | 20 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH | 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
23 * DAMAGE. | 23 * DAMAGE. |
24 */ | 24 */ |
25 | 25 |
26 #include "modules/webaudio/BiquadDSPKernel.h" | 26 #include "modules/webaudio/BiquadDSPKernel.h" |
| 27 #include <limits.h> |
27 #include "platform/audio/AudioUtilities.h" | 28 #include "platform/audio/AudioUtilities.h" |
28 #include "wtf/MathExtras.h" | 29 #include "wtf/MathExtras.h" |
29 #include "wtf/Vector.h" | 30 #include "wtf/Vector.h" |
30 #include <limits.h> | |
31 | 31 |
32 namespace blink { | 32 namespace blink { |
33 | 33 |
34 // FIXME: As a recursive linear filter, depending on its parameters, a biquad | 34 // FIXME: As a recursive linear filter, depending on its parameters, a biquad |
35 // filter can have an infinite tailTime. In practice, Biquad filters do not | 35 // filter can have an infinite tailTime. In practice, Biquad filters do not |
36 // usually (except for very high resonance values) have a tailTime of longer | 36 // usually (except for very high resonance values) have a tailTime of longer |
37 // than approx. 200ms. This value could possibly be calculated based on the | 37 // than approx. 200ms. This value could possibly be calculated based on the |
38 // settings of the Biquad. | 38 // settings of the Biquad. |
39 static const double MaxBiquadDelayTime = 0.2; | 39 static const double MaxBiquadDelayTime = 0.2; |
40 | 40 |
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199 | 199 |
200 double BiquadDSPKernel::tailTime() const { | 200 double BiquadDSPKernel::tailTime() const { |
201 return MaxBiquadDelayTime; | 201 return MaxBiquadDelayTime; |
202 } | 202 } |
203 | 203 |
204 double BiquadDSPKernel::latencyTime() const { | 204 double BiquadDSPKernel::latencyTime() const { |
205 return 0; | 205 return 0; |
206 } | 206 } |
207 | 207 |
208 } // namespace blink | 208 } // namespace blink |
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