/* * Copyright (C) 2010, Google Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "config.h" #if ENABLE(WEB_AUDIO) #include "AnalyserNode.h" #include "AudioNodeInput.h" #include "AudioNodeOutput.h" #include "ExceptionCode.h" namespace WebCore { AnalyserNode::AnalyserNode(AudioContext* context, float sampleRate) : AudioBasicInspectorNode(context, sampleRate, 2) { setNodeType(NodeTypeAnalyser); initialize(); } AnalyserNode::~AnalyserNode() { uninitialize(); } void AnalyserNode::process(size_t framesToProcess) { AudioBus* outputBus = output(0)->bus(); if (!isInitialized() || !input(0)->isConnected()) { outputBus->zero(); return; } AudioBus* inputBus = input(0)->bus(); // Give the analyser the audio which is passing through this AudioNode. m_analyser.writeInput(inputBus, framesToProcess); // For in-place processing, our override of pullInputs() will just pass the audio data through unchanged if the channel count matches from input to output // (resulting in inputBus == outputBus). Otherwise, do an up-mix to stereo. if (inputBus != outputBus) outputBus->copyFrom(*inputBus); } void AnalyserNode::reset() { m_analyser.reset(); } void AnalyserNode::setFftSize(unsigned size, ExceptionCode& ec) { if (!m_analyser.setFftSize(size)) ec = NOT_SUPPORTED_ERR; } } // namespace WebCore #endif // ENABLE(WEB_AUDIO)