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/v8/ExceptionState.h" 32 #include "core/dom/ExceptionCode.h" 33 #include "wtf/MainThread.h" 34 35 namespace WebCore { 36 37 WaveShaperNode::WaveShaperNode(AudioContext* context) 38 : AudioBasicProcessorNode(context, context->sampleRate()) 39 { 40 ScriptWrappable::init(this); 41 m_processor = adoptPtr(new WaveShaperProcessor(context->sampleRate(), 1)); 42 setNodeType(NodeTypeWaveShaper); 43 44 initialize(); 45 } 46 47 void WaveShaperNode::setCurve(Float32Array* curve) 48 { 49 ASSERT(isMainThread()); 50 waveShaperProcessor()->setCurve(curve); 51 } 52 53 Float32Array* WaveShaperNode::curve() 54 { 55 return waveShaperProcessor()->curve(); 56 } 57 58 void WaveShaperNode::setOversample(const String& type, ExceptionState& es) 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 es.throwDOMException(InvalidStateError); 75 } 76 77 String WaveShaperNode::oversample() const 78 { 79 switch (const_cast<WaveShaperNode*>(this)->waveShaperProcessor()->oversample()) { 80 case WaveShaperProcessor::OverSampleNone: 81 return "none"; 82 case WaveShaperProcessor::OverSample2x: 83 return "2x"; 84 case WaveShaperProcessor::OverSample4x: 85 return "4x"; 86 default: 87 ASSERT_NOT_REACHED(); 88 return "none"; 89 } 90 } 91 92 } // namespace WebCore 93 94 #endif // ENABLE(WEB_AUDIO) 95