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Diffstat (limited to '')
-rw-r--r-- | dom/media/webaudio/AudioBufferSourceNode.h | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/dom/media/webaudio/AudioBufferSourceNode.h b/dom/media/webaudio/AudioBufferSourceNode.h new file mode 100644 index 0000000000..9a3861555c --- /dev/null +++ b/dom/media/webaudio/AudioBufferSourceNode.h @@ -0,0 +1,129 @@ +/* -*- 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 AudioBufferSourceNode_h_ +#define AudioBufferSourceNode_h_ + +#include "AudioScheduledSourceNode.h" +#include "AudioBuffer.h" + +namespace mozilla::dom { + +struct AudioBufferSourceOptions; +class AudioParam; + +class AudioBufferSourceNode final : public AudioScheduledSourceNode, + public MainThreadMediaTrackListener { + public: + static already_AddRefed<AudioBufferSourceNode> Create( + JSContext* aCx, AudioContext& aAudioContext, + const AudioBufferSourceOptions& aOptions); + + void DestroyMediaTrack() override; + + uint16_t NumberOfInputs() const final { return 0; } + AudioBufferSourceNode* AsAudioBufferSourceNode() override { return this; } + NS_DECL_ISUPPORTS_INHERITED + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioBufferSourceNode, + AudioScheduledSourceNode) + + static already_AddRefed<AudioBufferSourceNode> Constructor( + const GlobalObject& aGlobal, AudioContext& aAudioContext, + const AudioBufferSourceOptions& aOptions) { + return Create(aGlobal.Context(), aAudioContext, aOptions); + } + + JSObject* WrapObject(JSContext* aCx, + JS::Handle<JSObject*> aGivenProto) override; + + void Start(double aWhen, double aOffset, const Optional<double>& aDuration, + ErrorResult& aRv); + + void Start(double aWhen, ErrorResult& aRv) override; + void Stop(double aWhen, ErrorResult& aRv) override; + + AudioBuffer* GetBuffer(JSContext* aCx) const { return mBuffer; } + void SetBuffer(JSContext* aCx, AudioBuffer* aBuffer, ErrorResult& aRv) { + if (aBuffer && mBufferSet) { + aRv.ThrowInvalidStateError( + "Cannot set the buffer attribute of an AudioBufferSourceNode " + "with an AudioBuffer more than once"); + return; + } + if (aBuffer) { + mBufferSet = true; + } + mBuffer = aBuffer; + SendBufferParameterToTrack(aCx); + SendLoopParametersToTrack(); + } + AudioParam* PlaybackRate() const { return mPlaybackRate; } + AudioParam* Detune() const { return mDetune; } + bool Loop() const { return mLoop; } + void SetLoop(bool aLoop) { + mLoop = aLoop; + SendLoopParametersToTrack(); + } + double LoopStart() const { return mLoopStart; } + void SetLoopStart(double aStart) { + mLoopStart = aStart; + SendLoopParametersToTrack(); + } + double LoopEnd() const { return mLoopEnd; } + void SetLoopEnd(double aEnd) { + mLoopEnd = aEnd; + SendLoopParametersToTrack(); + } + void NotifyMainThreadTrackEnded() override; + + const char* NodeType() const override { return "AudioBufferSourceNode"; } + + size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override; + size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override; + + private: + explicit AudioBufferSourceNode(AudioContext* aContext); + ~AudioBufferSourceNode() = default; + + friend class AudioBufferSourceNodeEngine; + // START is sent during Start(). + // STOP is sent during Stop(). + // BUFFERSTART and DURATION are sent when SetBuffer() and Start() have + // been called (along with sending the buffer). + enum EngineParameters { + SAMPLE_RATE, + START, + STOP, + // BUFFERSTART is the "offset" passed to start(), multiplied by + // buffer.sampleRate. + BUFFERSTART, + DURATION, + LOOP, + LOOPSTART, + LOOPEND, + PLAYBACKRATE, + DETUNE + }; + + void SendLoopParametersToTrack(); + void SendBufferParameterToTrack(JSContext* aCx); + void SendOffsetAndDurationParametersToTrack(AudioNodeTrack* aTrack); + + double mLoopStart; + double mLoopEnd; + double mOffset; + double mDuration; + RefPtr<AudioBuffer> mBuffer; + RefPtr<AudioParam> mPlaybackRate; + RefPtr<AudioParam> mDetune; + bool mLoop; + bool mStartCalled; + bool mBufferSet; +}; + +} // namespace mozilla::dom + +#endif |