| /* |
| * Copyright (C) 2011, 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/BiquadFilterNode.h" |
| |
| namespace blink { |
| |
| BiquadFilterNode::BiquadFilterNode(AudioContext* context, float sampleRate) |
| : AudioBasicProcessorNode(context, sampleRate) |
| { |
| ScriptWrappable::init(this); |
| // Initially setup as lowpass filter. |
| m_processor = adoptPtrWillBeNoop(new BiquadProcessor(context, sampleRate, 1, false)); |
| setNodeType(NodeTypeBiquadFilter); |
| } |
| |
| String BiquadFilterNode::type() const |
| { |
| switch (const_cast<BiquadFilterNode*>(this)->biquadProcessor()->type()) { |
| case BiquadProcessor::LowPass: |
| return "lowpass"; |
| case BiquadProcessor::HighPass: |
| return "highpass"; |
| case BiquadProcessor::BandPass: |
| return "bandpass"; |
| case BiquadProcessor::LowShelf: |
| return "lowshelf"; |
| case BiquadProcessor::HighShelf: |
| return "highshelf"; |
| case BiquadProcessor::Peaking: |
| return "peaking"; |
| case BiquadProcessor::Notch: |
| return "notch"; |
| case BiquadProcessor::Allpass: |
| return "allpass"; |
| default: |
| ASSERT_NOT_REACHED(); |
| return "lowpass"; |
| } |
| } |
| |
| void BiquadFilterNode::setType(const String& type) |
| { |
| if (type == "lowpass") |
| setType(BiquadProcessor::LowPass); |
| else if (type == "highpass") |
| setType(BiquadProcessor::HighPass); |
| else if (type == "bandpass") |
| setType(BiquadProcessor::BandPass); |
| else if (type == "lowshelf") |
| setType(BiquadProcessor::LowShelf); |
| else if (type == "highshelf") |
| setType(BiquadProcessor::HighShelf); |
| else if (type == "peaking") |
| setType(BiquadProcessor::Peaking); |
| else if (type == "notch") |
| setType(BiquadProcessor::Notch); |
| else if (type == "allpass") |
| setType(BiquadProcessor::Allpass); |
| } |
| |
| bool BiquadFilterNode::setType(unsigned type) |
| { |
| if (type > BiquadProcessor::Allpass) |
| return false; |
| |
| biquadProcessor()->setType(static_cast<BiquadProcessor::FilterType>(type)); |
| return true; |
| } |
| |
| void BiquadFilterNode::getFrequencyResponse(const Float32Array* frequencyHz, |
| Float32Array* magResponse, |
| Float32Array* phaseResponse) |
| { |
| if (!frequencyHz || !magResponse || !phaseResponse) |
| return; |
| |
| int n = std::min(frequencyHz->length(), |
| std::min(magResponse->length(), phaseResponse->length())); |
| |
| if (n) { |
| biquadProcessor()->getFrequencyResponse(n, |
| frequencyHz->data(), |
| magResponse->data(), |
| phaseResponse->data()); |
| } |
| } |
| |
| } // namespace blink |
| |
| #endif // ENABLE(WEB_AUDIO) |