| /* |
| * 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 "modules/webaudio/AnalyserNode.h" |
| |
| #include "bindings/v8/ExceptionState.h" |
| #include "core/dom/ExceptionCode.h" |
| #include "modules/webaudio/AudioNodeInput.h" |
| #include "modules/webaudio/AudioNodeOutput.h" |
| |
| namespace WebCore { |
| |
| AnalyserNode::AnalyserNode(AudioContext* context, float sampleRate) |
| : AudioBasicInspectorNode(context, sampleRate, 2) |
| { |
| ScriptWrappable::init(this); |
| 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, ExceptionState& es) |
| { |
| if (!m_analyser.setFftSize(size)) |
| es.throwDOMException(NotSupportedError); |
| } |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WEB_AUDIO) |