1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/webaudio/AudioBufferSourceNode.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,148 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef AudioBufferSourceNode_h_
1.11 +#define AudioBufferSourceNode_h_
1.12 +
1.13 +#include "AudioNode.h"
1.14 +#include "AudioBuffer.h"
1.15 +
1.16 +namespace mozilla {
1.17 +namespace dom {
1.18 +
1.19 +class AudioParam;
1.20 +
1.21 +class AudioBufferSourceNode : public AudioNode,
1.22 + public MainThreadMediaStreamListener
1.23 +{
1.24 +public:
1.25 + explicit AudioBufferSourceNode(AudioContext* aContext);
1.26 + virtual ~AudioBufferSourceNode();
1.27 +
1.28 + virtual void DestroyMediaStream() MOZ_OVERRIDE
1.29 + {
1.30 + if (mStream) {
1.31 + mStream->RemoveMainThreadListener(this);
1.32 + }
1.33 + AudioNode::DestroyMediaStream();
1.34 + }
1.35 + virtual uint16_t NumberOfInputs() const MOZ_FINAL MOZ_OVERRIDE
1.36 + {
1.37 + return 0;
1.38 + }
1.39 + virtual AudioBufferSourceNode* AsAudioBufferSourceNode() MOZ_OVERRIDE
1.40 + {
1.41 + return this;
1.42 + }
1.43 + NS_DECL_ISUPPORTS_INHERITED
1.44 + NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioBufferSourceNode, AudioNode)
1.45 +
1.46 + virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
1.47 +
1.48 + void Start(double aWhen, double aOffset,
1.49 + const Optional<double>& aDuration, ErrorResult& aRv);
1.50 + void Stop(double aWhen, ErrorResult& aRv);
1.51 +
1.52 + AudioBuffer* GetBuffer(JSContext* aCx) const
1.53 + {
1.54 + return mBuffer;
1.55 + }
1.56 + void SetBuffer(JSContext* aCx, AudioBuffer* aBuffer)
1.57 + {
1.58 + mBuffer = aBuffer;
1.59 + SendBufferParameterToStream(aCx);
1.60 + SendLoopParametersToStream();
1.61 + }
1.62 + AudioParam* PlaybackRate() const
1.63 + {
1.64 + return mPlaybackRate;
1.65 + }
1.66 + bool Loop() const
1.67 + {
1.68 + return mLoop;
1.69 + }
1.70 + void SetLoop(bool aLoop)
1.71 + {
1.72 + mLoop = aLoop;
1.73 + SendLoopParametersToStream();
1.74 + }
1.75 + double LoopStart() const
1.76 + {
1.77 + return mLoopStart;
1.78 + }
1.79 + void SetLoopStart(double aStart)
1.80 + {
1.81 + mLoopStart = aStart;
1.82 + SendLoopParametersToStream();
1.83 + }
1.84 + double LoopEnd() const
1.85 + {
1.86 + return mLoopEnd;
1.87 + }
1.88 + void SetLoopEnd(double aEnd)
1.89 + {
1.90 + mLoopEnd = aEnd;
1.91 + SendLoopParametersToStream();
1.92 + }
1.93 + void SendDopplerShiftToStream(double aDopplerShift);
1.94 +
1.95 + IMPL_EVENT_HANDLER(ended)
1.96 +
1.97 + virtual void NotifyMainThreadStateChanged() MOZ_OVERRIDE;
1.98 +
1.99 + virtual const char* NodeType() const
1.100 + {
1.101 + return "AudioBufferSourceNode";
1.102 + }
1.103 +
1.104 + virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
1.105 + virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const MOZ_OVERRIDE;
1.106 +
1.107 +private:
1.108 + friend class AudioBufferSourceNodeEngine;
1.109 + // START is sent during Start().
1.110 + // STOP is sent during Stop().
1.111 + // BUFFERSTART and BUFFEREND are sent when SetBuffer() and Start() have
1.112 + // been called (along with sending the buffer).
1.113 + enum EngineParameters {
1.114 + SAMPLE_RATE,
1.115 + START,
1.116 + STOP,
1.117 + // BUFFERSTART is the "offset" passed to start(), multiplied by
1.118 + // buffer.sampleRate.
1.119 + BUFFERSTART,
1.120 + // BUFFEREND is the sum of "offset" and "duration" passed to start(),
1.121 + // multiplied by buffer.sampleRate, or the size of the buffer, if smaller.
1.122 + BUFFEREND,
1.123 + LOOP,
1.124 + LOOPSTART,
1.125 + LOOPEND,
1.126 + PLAYBACKRATE,
1.127 + DOPPLERSHIFT
1.128 + };
1.129 +
1.130 + void SendLoopParametersToStream();
1.131 + void SendBufferParameterToStream(JSContext* aCx);
1.132 + void SendOffsetAndDurationParametersToStream(AudioNodeStream* aStream);
1.133 + static void SendPlaybackRateToStream(AudioNode* aNode);
1.134 +
1.135 +private:
1.136 + double mLoopStart;
1.137 + double mLoopEnd;
1.138 + double mOffset;
1.139 + double mDuration;
1.140 + nsRefPtr<AudioBuffer> mBuffer;
1.141 + nsRefPtr<AudioParam> mPlaybackRate;
1.142 + bool mLoop;
1.143 + bool mStartCalled;
1.144 + bool mStopped;
1.145 +};
1.146 +
1.147 +}
1.148 +}
1.149 +
1.150 +#endif
1.151 +
