chromium/src/third_party/blink/renderer/modules/webaudio/delay_node.cc

/*
 * 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
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */

#include "third_party/blink/renderer/modules/webaudio/delay_node.h"

#include <memory>

#include "third_party/blink/renderer/bindings/modules/v8/v8_delay_options.h"
#include "third_party/blink/renderer/modules/webaudio/audio_basic_processor_handler.h"
#include "third_party/blink/renderer/modules/webaudio/delay_processor.h"
#include "third_party/blink/renderer/platform/bindings/exception_messages.h"
#include "third_party/blink/renderer/platform/bindings/exception_state.h"
#include "third_party/blink/renderer/platform/wtf/math_extras.h"

namespace blink {

const double kMaximumAllowedDelayTime = 180;

DelayHandler::DelayHandler(AudioNode& node,
                           float sample_rate,
                           AudioParamHandler& delay_time,
                           double max_delay_time)
    : AudioBasicProcessorHandler(
          kNodeTypeDelay,
          node,
          sample_rate,
          std::make_unique<DelayProcessor>(sample_rate,
                                           1,
                                           delay_time,
                                           max_delay_time)) {
  // Initialize the handler so that AudioParams can be processed.
  Initialize();
}

scoped_refptr<DelayHandler> DelayHandler::Create(AudioNode& node,
                                                 float sample_rate,
                                                 AudioParamHandler& delay_time,
                                                 double max_delay_time) {
  return base::AdoptRef(
      new DelayHandler(node, sample_rate, delay_time, max_delay_time));
}

DelayNode::DelayNode(BaseAudioContext& context, double max_delay_time)
    : AudioNode(context),
      delay_time_(
          AudioParam::Create(context,
                             Uuid(),
                             AudioParamHandler::kParamTypeDelayDelayTime,
                             0.0,
                             AudioParamHandler::AutomationRate::kAudio,
                             AudioParamHandler::AutomationRateMode::kVariable,
                             0.0,
                             max_delay_time)) {
  SetHandler(DelayHandler::Create(*this, context.sampleRate(),
                                  delay_time_->Handler(), max_delay_time));
}

DelayNode* DelayNode::Create(BaseAudioContext& context,
                             ExceptionState& exception_state) {
  DCHECK(IsMainThread());

  // The default maximum delay time for the delay node is 1 sec.
  return Create(context, 1, exception_state);
}

DelayNode* DelayNode::Create(BaseAudioContext& context,
                             double max_delay_time,
                             ExceptionState& exception_state) {
  DCHECK(IsMainThread());

  if (max_delay_time <= 0 || max_delay_time >= kMaximumAllowedDelayTime) {
    exception_state.ThrowDOMException(
        DOMExceptionCode::kNotSupportedError,
        ExceptionMessages::IndexOutsideRange(
            "max delay time", max_delay_time, 0.0,
            ExceptionMessages::kExclusiveBound, kMaximumAllowedDelayTime,
            ExceptionMessages::kExclusiveBound));
    return nullptr;
  }

  return MakeGarbageCollected<DelayNode>(context, max_delay_time);
}

DelayNode* DelayNode::Create(BaseAudioContext* context,
                             const DelayOptions* options,
                             ExceptionState& exception_state) {
  // maxDelayTime has a default value specified.
  DelayNode* node = Create(*context, options->maxDelayTime(), exception_state);

  if (!node)
    return nullptr;

  node->HandleChannelOptions(options, exception_state);

  node->delayTime()->setValue(options->delayTime());

  return node;
}

AudioParam* DelayNode::delayTime() {
  return delay_time_;
}

void DelayNode::Trace(Visitor* visitor) const {
  visitor->Trace(delay_time_);
  AudioNode::Trace(visitor);
}

void DelayNode::ReportDidCreate() {
  GraphTracer().DidCreateAudioNode(this);
  GraphTracer().DidCreateAudioParam(delay_time_);
}

void DelayNode::ReportWillBeDestroyed() {
  GraphTracer().WillDestroyAudioParam(delay_time_);
  GraphTracer().WillDestroyAudioNode(this);
}

}  // namespace blink