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87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef AudioBuffer_h_
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#define AudioBuffer_h_
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#include "nsWrapperCache.h"
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#include "nsCycleCollectionParticipant.h"
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#include "mozilla/Attributes.h"
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#include "EnableWebAudioCheck.h"
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#include "nsAutoPtr.h"
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#include "nsTArray.h"
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#include "AudioContext.h"
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struct JSContext;
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struct JSObject;
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namespace mozilla {
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class ErrorResult;
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namespace dom {
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class AudioBuffer MOZ_FINAL : public nsISupports,
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public nsWrapperCache,
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public EnableWebAudioCheck
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{
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public:
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AudioBuffer(AudioContext* aContext, uint32_t aLength,
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uint32_t aSampleRate);
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~AudioBuffer();
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// This function needs to be called in order to allocate
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// all of the channels. It is fallible!
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bool InitializeBuffers(uint32_t aNumberOfChannels,
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JSContext* aJSContext);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(AudioBuffer)
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AudioContext* GetParentObject() const
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{
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return mContext;
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}
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virtual JSObject* WrapObject(JSContext* aCx, JSObject* aScope,
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bool* aTriedToWrap);
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float SampleRate() const
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{
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return mSampleRate;
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}
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uint32_t Length() const
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{
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return mLength;
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}
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double Duration() const
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{
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return mLength / static_cast<double> (mSampleRate);
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}
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uint32_t NumberOfChannels() const
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{
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return mChannels.Length();
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}
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JSObject* GetChannelData(JSContext* aJSContext, uint32_t aChannel,
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ErrorResult& aRv) const;
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private:
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nsRefPtr<AudioContext> mContext;
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FallibleTArray<JSObject*> mChannels;
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uint32_t mLength;
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float mSampleRate;
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};
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}
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}
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#endif
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