зеркало из https://github.com/mozilla/gecko-dev.git
124 строки
3.9 KiB
C++
124 строки
3.9 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 AudioBufferSourceNode_h_
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#define AudioBufferSourceNode_h_
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#include "AudioScheduledSourceNode.h"
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#include "AudioBuffer.h"
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namespace mozilla {
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namespace dom {
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struct AudioBufferSourceOptions;
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class AudioParam;
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class AudioBufferSourceNode final : public AudioScheduledSourceNode,
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public MainThreadMediaTrackListener {
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public:
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static already_AddRefed<AudioBufferSourceNode> Create(
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JSContext* aCx, AudioContext& aAudioContext,
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const AudioBufferSourceOptions& aOptions);
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void DestroyMediaTrack() override;
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uint16_t NumberOfInputs() const final { return 0; }
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AudioBufferSourceNode* AsAudioBufferSourceNode() override { return this; }
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioBufferSourceNode,
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AudioScheduledSourceNode)
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static already_AddRefed<AudioBufferSourceNode> Constructor(
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const GlobalObject& aGlobal, AudioContext& aAudioContext,
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const AudioBufferSourceOptions& aOptions) {
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return Create(aGlobal.Context(), aAudioContext, aOptions);
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}
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JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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void Start(double aWhen, double aOffset, const Optional<double>& aDuration,
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ErrorResult& aRv);
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void Start(double aWhen, ErrorResult& aRv) override;
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void Stop(double aWhen, ErrorResult& aRv) override;
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AudioBuffer* GetBuffer(JSContext* aCx) const { return mBuffer; }
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void SetBuffer(JSContext* aCx, AudioBuffer* aBuffer) {
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mBuffer = aBuffer;
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SendBufferParameterToTrack(aCx);
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SendLoopParametersToTrack();
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}
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AudioParam* PlaybackRate() const { return mPlaybackRate; }
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AudioParam* Detune() const { return mDetune; }
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bool Loop() const { return mLoop; }
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void SetLoop(bool aLoop) {
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mLoop = aLoop;
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SendLoopParametersToTrack();
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}
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double LoopStart() const { return mLoopStart; }
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void SetLoopStart(double aStart) {
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mLoopStart = aStart;
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SendLoopParametersToTrack();
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}
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double LoopEnd() const { return mLoopEnd; }
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void SetLoopEnd(double aEnd) {
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mLoopEnd = aEnd;
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SendLoopParametersToTrack();
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}
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void NotifyMainThreadTrackEnded() override;
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const char* NodeType() const override { return "AudioBufferSourceNode"; }
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size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
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size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
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private:
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explicit AudioBufferSourceNode(AudioContext* aContext);
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~AudioBufferSourceNode() = default;
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friend class AudioBufferSourceNodeEngine;
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// START is sent during Start().
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// STOP is sent during Stop().
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// BUFFERSTART and BUFFEREND are sent when SetBuffer() and Start() have
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// been called (along with sending the buffer).
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enum EngineParameters {
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SAMPLE_RATE,
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START,
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STOP,
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// BUFFERSTART is the "offset" passed to start(), multiplied by
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// buffer.sampleRate.
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BUFFERSTART,
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// BUFFEREND is the sum of "offset" and "duration" passed to start(),
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// multiplied by buffer.sampleRate, or the size of the buffer, if smaller.
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BUFFEREND,
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LOOP,
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LOOPSTART,
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LOOPEND,
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PLAYBACKRATE,
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DETUNE
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};
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void SendLoopParametersToTrack();
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void SendBufferParameterToTrack(JSContext* aCx);
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void SendOffsetAndDurationParametersToTrack(AudioNodeTrack* aTrack);
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double mLoopStart;
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double mLoopEnd;
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double mOffset;
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double mDuration;
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RefPtr<AudioBuffer> mBuffer;
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RefPtr<AudioParam> mPlaybackRate;
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RefPtr<AudioParam> mDetune;
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bool mLoop;
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bool mStartCalled;
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};
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} // namespace dom
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} // namespace mozilla
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#endif
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