dom/media/webaudio/OscillatorNode.h
author Mike Hommey <mh+mozilla@glandium.org>
Fri, 11 Jan 2019 16:01:15 +0000
changeset 453570 daf50f25895db073e44d50fecf2e4f6fe873865d
parent 446960 0ceae9db9ec0be18daa1a279511ad305723185d4
permissions -rw-r--r--
Bug 1519307 - Add a new project to build useful parts of breakpad independently. r=froydnj With `ac_add_options --enable-project=tools/crashreporter` in a mozconfig, `./mach build` builds minidump_stackwalk, dump_syms and fileid. One caveat is that due to limitation in how the build system works currently, it's cumbersome to keep dump_syms as a host program for Gecko, and to make it a target program for this project. For now, keep it as a host program. We're not going to use it on automation, but it's still convenient to have for quick local builds (I've had to resort to awful hacks downstream). Differential Revision: https://phabricator.services.mozilla.com/D16299

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef OscillatorNode_h_
#define OscillatorNode_h_

#include "AudioScheduledSourceNode.h"
#include "AudioParam.h"
#include "PeriodicWave.h"
#include "mozilla/dom/OscillatorNodeBinding.h"

namespace mozilla {
namespace dom {

class AudioContext;
struct OscillatorOptions;

class OscillatorNode final : public AudioScheduledSourceNode,
                             public MainThreadMediaStreamListener {
 public:
  static already_AddRefed<OscillatorNode> Create(
      AudioContext& aAudioContext, const OscillatorOptions& aOptions,
      ErrorResult& aRv);

  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(OscillatorNode,
                                           AudioScheduledSourceNode)

  static already_AddRefed<OscillatorNode> Constructor(
      const GlobalObject& aGlobal, AudioContext& aAudioContext,
      const OscillatorOptions& aOptions, ErrorResult& aRv) {
    return Create(aAudioContext, aOptions, aRv);
  }

  JSObject* WrapObject(JSContext* aCx,
                       JS::Handle<JSObject*> aGivenProto) override;

  void DestroyMediaStream() override;

  uint16_t NumberOfInputs() const final { return 0; }

  OscillatorType Type() const { return mType; }
  void SetType(OscillatorType aType, ErrorResult& aRv) {
    if (aType == OscillatorType::Custom) {
      // ::Custom can only be set by setPeriodicWave().
      // https://github.com/WebAudio/web-audio-api/issues/105 for exception.
      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
      return;
    }
    mType = aType;
    SendTypeToStream();
  }

  AudioParam* Frequency() const { return mFrequency; }
  AudioParam* Detune() const { return mDetune; }

  void Start(double aWhen, ErrorResult& aRv) override;
  void Stop(double aWhen, ErrorResult& aRv) override;

  void SetPeriodicWave(PeriodicWave& aPeriodicWave) {
    mPeriodicWave = &aPeriodicWave;
    // SendTypeToStream will call SendPeriodicWaveToStream for us.
    mType = OscillatorType::Custom;
    SendTypeToStream();
  }

  void NotifyMainThreadStreamFinished() override;

  const char* NodeType() const override { return "OscillatorNode"; }

  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;

 private:
  explicit OscillatorNode(AudioContext* aContext);
  ~OscillatorNode() = default;

  void SendTypeToStream();
  void SendPeriodicWaveToStream();

  OscillatorType mType;
  RefPtr<PeriodicWave> mPeriodicWave;
  RefPtr<AudioParam> mFrequency;
  RefPtr<AudioParam> mDetune;
  bool mStartCalled;
};

}  // namespace dom
}  // namespace mozilla

#endif