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
36namespace blink {
37
38WaveShaperNode::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
47void WaveShaperNode::setCurve(Float32Array* curve)
48{
49    ASSERT(isMainThread());
50    waveShaperProcessor()->setCurve(curve);
51}
52
53Float32Array* WaveShaperNode::curve()
54{
55    return waveShaperProcessor()->curve();
56}
57
58void 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
78String 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