dom/media/AudioTrack.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim:set ts=2 sw=2 et tw=78: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/AudioStreamTrack.h"
   8 #include "mozilla/dom/AudioTrack.h"
   9 #include "mozilla/dom/AudioTrackBinding.h"
  10 #include "mozilla/dom/AudioTrackList.h"
  11 #include "mozilla/dom/HTMLMediaElement.h"
  12
  13 namespace mozilla::dom {
  14
  15 AudioTrack::AudioTrack(nsIGlobalObject* aOwnerGlobal, const nsAString& aId,
  16                        const nsAString& aKind, const nsAString& aLabel,
  17                        const nsAString& aLanguage, bool aEnabled,
  18                        AudioStreamTrack* aStreamTrack)
  19     : MediaTrack(aOwnerGlobal, aId, aKind, aLabel, aLanguage),
  20       mEnabled(aEnabled),
  21       mAudioStreamTrack(aStreamTrack) {}
  22
  23 AudioTrack::~AudioTrack() = default;
  24
  25 NS_IMPL_CYCLE_COLLECTION_INHERITED(AudioTrack, MediaTrack, mAudioStreamTrack)
  26
  27 NS_IMPL_ADDREF_INHERITED(AudioTrack, MediaTrack)
  28 NS_IMPL_RELEASE_INHERITED(AudioTrack, MediaTrack)
  29 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AudioTrack)
  30 NS_INTERFACE_MAP_END_INHERITING(MediaTrack)
  31
  32 JSObject* AudioTrack::WrapObject(JSContext* aCx,
  33                                  JS::Handle<JSObject*> aGivenProto) {
  34   return AudioTrack_Binding::Wrap(aCx, this, aGivenProto);
  35 }
  36
  37 void AudioTrack::SetEnabled(bool aEnabled) {
  38   SetEnabledInternal(aEnabled, MediaTrack::DEFAULT);
  39 }
  40
  41 void AudioTrack::SetEnabledInternal(bool aEnabled, int aFlags) {
  42   if (aEnabled == mEnabled) {
  43     return;
  44   }
  45   mEnabled = aEnabled;
  46
  47   // If this AudioTrack is no longer in its original AudioTrackList, then
  48   // whether it is enabled or not has no effect on its original list.
  49   if (!mList) {
  50     return;
  51   }
  52
  53   if (mEnabled) {
  54     HTMLMediaElement* element = mList->GetMediaElement();
  55     if (element) {
  56       element->NotifyMediaTrackEnabled(this);
  57     }
  58   } else {
  59     HTMLMediaElement* element = mList->GetMediaElement();
  60     if (element) {
  61       element->NotifyMediaTrackDisabled(this);
  62     }
  63   }
  64
  65   if (!(aFlags & MediaTrack::FIRE_NO_EVENTS)) {
  66     mList->CreateAndDispatchChangeEvent();
  67   }
  68 }
  69
  70 }  // namespace mozilla::dom