1 | /* |
2 | * Copyright (C) 2011, Google Inc. All rights reserved. |
3 | * |
4 | * Redistribution and use in source and binary forms, with or without |
5 | * modification, are permitted provided that the following conditions |
6 | * are met: |
7 | * 1. Redistributions of source code must retain the above copyright |
8 | * notice, this list of conditions and the following disclaimer. |
9 | * 2. Redistributions in binary form must reproduce the above copyright |
10 | * notice, this list of conditions and the following disclaimer in the |
11 | * documentation and/or other materials provided with the distribution. |
12 | * |
13 | * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
16 | * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
17 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
18 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
19 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
20 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
22 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
23 | */ |
24 | |
25 | #include "config.h" |
26 | |
27 | #if ENABLE(WEB_AUDIO) |
28 | |
29 | #include "BiquadFilterNode.h" |
30 | #include <wtf/IsoMallocInlines.h> |
31 | |
32 | namespace WebCore { |
33 | |
34 | WTF_MAKE_ISO_ALLOCATED_IMPL(BiquadFilterNode); |
35 | |
36 | BiquadFilterNode::BiquadFilterNode(AudioContext& context, float sampleRate) |
37 | : AudioBasicProcessorNode(context, sampleRate) |
38 | { |
39 | setNodeType(NodeTypeBiquadFilter); |
40 | |
41 | // Initially setup as lowpass filter. |
42 | m_processor = std::make_unique<BiquadProcessor>(context, sampleRate, 1, false); |
43 | } |
44 | |
45 | BiquadFilterType BiquadFilterNode::type() const |
46 | { |
47 | return const_cast<BiquadFilterNode*>(this)->biquadProcessor()->type(); |
48 | } |
49 | |
50 | void BiquadFilterNode::setType(BiquadFilterType type) |
51 | { |
52 | biquadProcessor()->setType(type); |
53 | } |
54 | |
55 | void BiquadFilterNode::getFrequencyResponse(const RefPtr<Float32Array>& frequencyHz, const RefPtr<Float32Array>& magResponse, const RefPtr<Float32Array>& phaseResponse) |
56 | { |
57 | if (!frequencyHz || !magResponse || !phaseResponse) |
58 | return; |
59 | |
60 | int n = std::min(frequencyHz->length(), std::min(magResponse->length(), phaseResponse->length())); |
61 | |
62 | if (n) |
63 | biquadProcessor()->getFrequencyResponse(n, frequencyHz->data(), magResponse->data(), phaseResponse->data()); |
64 | } |
65 | |
66 | } // namespace WebCore |
67 | |
68 | #endif // ENABLE(WEB_AUDIO) |
69 | |