The Tor Browser: content/media/webaudio/AudioProcessingEvent.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* vim:set ts=2 sw=2 sts=2 et cindent: */

     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/. */

     7 #ifndef AudioProcessingEvent_h_

     8 #define AudioProcessingEvent_h_

    10 #include "AudioBuffer.h"

    11 #include "ScriptProcessorNode.h"

    12 #include "mozilla/dom/Event.h"

    14 namespace mozilla {

    15 namespace dom {

    17 class AudioProcessingEvent : public Event

    18 {

    19 public:

    20   AudioProcessingEvent(ScriptProcessorNode* aOwner,

    21                        nsPresContext* aPresContext,

    22                        WidgetEvent* aEvent);

    24   NS_DECL_ISUPPORTS_INHERITED

    25   NS_FORWARD_TO_EVENT

    26   NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioProcessingEvent, Event)

    28   virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;

    30   void InitEvent(AudioBuffer* aInputBuffer,

    31                  uint32_t aNumberOfInputChannels,

    32                  double aPlaybackTime)

    33   {

    34     InitEvent(NS_LITERAL_STRING("audioprocess"), false, false);

    35     mInputBuffer = aInputBuffer;

    36     mNumberOfInputChannels = aNumberOfInputChannels;

    37     mPlaybackTime = aPlaybackTime;

    38   }

    40   double PlaybackTime() const

    41   {

    42     return mPlaybackTime;

    43   }

    45   AudioBuffer* GetInputBuffer(ErrorResult& aRv)

    46   {

    47     if (!mInputBuffer) {

    48       mInputBuffer = LazilyCreateBuffer(mNumberOfInputChannels, aRv);

    49     }

    50     return mInputBuffer;

    51   }

    53   AudioBuffer* GetOutputBuffer(ErrorResult& aRv)

    54   {

    55     if (!mOutputBuffer) {

    56       mOutputBuffer = LazilyCreateBuffer(mNode->NumberOfOutputChannels(), aRv);

    57     }

    58     return mOutputBuffer;

    59   }

    61   bool HasOutputBuffer() const

    62   {

    63     return !!mOutputBuffer;

    64   }

    66 private:

    67   already_AddRefed<AudioBuffer>

    68   LazilyCreateBuffer(uint32_t aNumberOfChannels, ErrorResult& rv);

    70 private:

    71   double mPlaybackTime;

    72   nsRefPtr<AudioBuffer> mInputBuffer;

    73   nsRefPtr<AudioBuffer> mOutputBuffer;

    74   nsRefPtr<ScriptProcessorNode> mNode;

    75   uint32_t mNumberOfInputChannels;

    76 };

    78 }

    79 }

    81 #endif

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