| /* |
| * 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/DynamicsCompressorNode.h" |
| |
| #include "platform/audio/DynamicsCompressor.h" |
| #include "modules/webaudio/AudioContext.h" |
| #include "modules/webaudio/AudioNodeInput.h" |
| #include "modules/webaudio/AudioNodeOutput.h" |
| |
| // Set output to stereo by default. |
| static const unsigned defaultNumberOfOutputChannels = 2; |
| |
| namespace blink { |
| |
| DynamicsCompressorNode::DynamicsCompressorNode(AudioContext* context, float sampleRate) |
| : AudioNode(context, sampleRate) |
| { |
| ScriptWrappable::init(this); |
| addInput(); |
| addOutput(AudioNodeOutput::create(this, defaultNumberOfOutputChannels)); |
| |
| setNodeType(NodeTypeDynamicsCompressor); |
| |
| m_threshold = AudioParam::create(context, -24); |
| m_knee = AudioParam::create(context, 30); |
| m_ratio = AudioParam::create(context, 12); |
| m_reduction = AudioParam::create(context, 0); |
| m_attack = AudioParam::create(context, 0.003); |
| m_release = AudioParam::create(context, 0.250); |
| |
| initialize(); |
| } |
| |
| DynamicsCompressorNode::~DynamicsCompressorNode() |
| { |
| ASSERT(!isInitialized()); |
| } |
| |
| void DynamicsCompressorNode::dispose() |
| { |
| uninitialize(); |
| AudioNode::dispose(); |
| } |
| |
| void DynamicsCompressorNode::process(size_t framesToProcess) |
| { |
| AudioBus* outputBus = output(0)->bus(); |
| ASSERT(outputBus); |
| |
| float threshold = m_threshold->value(); |
| float knee = m_knee->value(); |
| float ratio = m_ratio->value(); |
| float attack = m_attack->value(); |
| float release = m_release->value(); |
| |
| m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamThreshold, threshold); |
| m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamKnee, knee); |
| m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamRatio, ratio); |
| m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamAttack, attack); |
| m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamRelease, release); |
| |
| m_dynamicsCompressor->process(input(0)->bus(), outputBus, framesToProcess); |
| |
| float reduction = m_dynamicsCompressor->parameterValue(DynamicsCompressor::ParamReduction); |
| m_reduction->setValue(reduction); |
| } |
| |
| void DynamicsCompressorNode::initialize() |
| { |
| if (isInitialized()) |
| return; |
| |
| AudioNode::initialize(); |
| m_dynamicsCompressor = adoptPtr(new DynamicsCompressor(sampleRate(), defaultNumberOfOutputChannels)); |
| } |
| |
| void DynamicsCompressorNode::uninitialize() |
| { |
| if (!isInitialized()) |
| return; |
| |
| m_dynamicsCompressor.clear(); |
| AudioNode::uninitialize(); |
| } |
| |
| double DynamicsCompressorNode::tailTime() const |
| { |
| return m_dynamicsCompressor->tailTime(); |
| } |
| |
| double DynamicsCompressorNode::latencyTime() const |
| { |
| return m_dynamicsCompressor->latencyTime(); |
| } |
| |
| void DynamicsCompressorNode::trace(Visitor* visitor) |
| { |
| visitor->trace(m_threshold); |
| visitor->trace(m_knee); |
| visitor->trace(m_ratio); |
| visitor->trace(m_reduction); |
| visitor->trace(m_attack); |
| visitor->trace(m_release); |
| AudioNode::trace(visitor); |
| } |
| |
| } // namespace blink |
| |
| #endif // ENABLE(WEB_AUDIO) |