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/*
* 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 "third_party/blink/renderer/modules/webaudio/gain_node.h"
#include "third_party/blink/renderer/bindings/modules/v8/v8_gain_options.h"
#include "third_party/blink/renderer/modules/webaudio/audio_graph_tracer.h"
#include "third_party/blink/renderer/modules/webaudio/gain_handler.h"
namespace blink {
namespace {
constexpr double kDefaultGainValue = 1.0;
} // namespace
GainNode::GainNode(BaseAudioContext& context)
: AudioNode(context),
gain_(AudioParam::Create(
context,
Uuid(),
AudioParamHandler::AudioParamType::kParamTypeGainGain,
kDefaultGainValue,
AudioParamHandler::AutomationRate::kAudio,
AudioParamHandler::AutomationRateMode::kVariable)) {
SetHandler(
GainHandler::Create(*this, context.sampleRate(), gain_->Handler()));
}
GainNode* GainNode::Create(BaseAudioContext& context,
ExceptionState& exception_state) {
DCHECK(IsMainThread());
return MakeGarbageCollected<GainNode>(context);
}
GainNode* GainNode::Create(BaseAudioContext* context,
const GainOptions* options,
ExceptionState& exception_state) {
GainNode* node = Create(*context, exception_state);
if (!node) {
return nullptr;
}
node->HandleChannelOptions(options, exception_state);
node->gain()->setValue(options->gain());
return node;
}
AudioParam* GainNode::gain() const {
return gain_.Get();
}
void GainNode::Trace(Visitor* visitor) const {
visitor->Trace(gain_);
AudioNode::Trace(visitor);
}
void GainNode::ReportDidCreate() {
GraphTracer().DidCreateAudioNode(this);
GraphTracer().DidCreateAudioParam(gain_);
}
void GainNode::ReportWillBeDestroyed() {
GraphTracer().WillDestroyAudioParam(gain_);
GraphTracer().WillDestroyAudioNode(this);
}
} // namespace blink
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