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 "modules/webaudio/WaveShaperNode.h"
30
31 #include "bindings/core/v8/ExceptionMessages.h"
32 #include "bindings/core/v8/ExceptionState.h"
33 #include "core/dom/ExceptionCode.h"
34 #include "wtf/MainThread.h"
35
36 namespace blink {
37
WaveShaperNode(AudioContext * context)38 WaveShaperNode::WaveShaperNode(AudioContext* context)
39 : AudioBasicProcessorNode(context, context->sampleRate())
40 {
41 m_processor = new WaveShaperProcessor(context->sampleRate(), 1);
42 setNodeType(NodeTypeWaveShaper);
43
44 initialize();
45 }
46
setCurve(Float32Array * curve)47 void WaveShaperNode::setCurve(Float32Array* curve)
48 {
49 ASSERT(isMainThread());
50 waveShaperProcessor()->setCurve(curve);
51 }
52
curve()53 Float32Array* WaveShaperNode::curve()
54 {
55 return waveShaperProcessor()->curve();
56 }
57
setOversample(const String & type,ExceptionState & exceptionState)58 void WaveShaperNode::setOversample(const String& type, ExceptionState& exceptionState)
59 {
60 ASSERT(isMainThread());
61
62 // This is to synchronize with the changes made in
63 // AudioBasicProcessorNode::checkNumberOfChannelsForInput() where we can
64 // initialize() and uninitialize().
65 AudioContext::AutoLocker contextLocker(context());
66
67 if (type == "none") {
68 waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSampleNone);
69 } else if (type == "2x") {
70 waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSample2x);
71 } else if (type == "4x") {
72 waveShaperProcessor()->setOversample(WaveShaperProcessor::OverSample4x);
73 } else {
74 ASSERT_NOT_REACHED();
75 }
76 }
77
oversample() const78 String WaveShaperNode::oversample() const
79 {
80 switch (const_cast<WaveShaperNode*>(this)->waveShaperProcessor()->oversample()) {
81 case WaveShaperProcessor::OverSampleNone:
82 return "none";
83 case WaveShaperProcessor::OverSample2x:
84 return "2x";
85 case WaveShaperProcessor::OverSample4x:
86 return "4x";
87 default:
88 ASSERT_NOT_REACHED();
89 return "none";
90 }
91 }
92
93 } // namespace blink
94
95 #endif // ENABLE(WEB_AUDIO)
96