gecko/content/media/webaudio/AudioDestinationNode.h
Robert O'Callahan 6d8b72a707 Bug 804387. Part 9: Update WebAudio implementation to integrate with AudioNodeStream. r=ehsan
This is a mega-patch that was too hard to disentangle. Here's what it does:
-- Create infrastructure around AudioNode::UpdateOutputEnded to detect
when a node can no longer produce any output. When that becomes true,
disconnect it from the AudioNode graph.
-- Have AudioNode implement JSBindingFinalized to use as input in
UpdateOutputEnded.
-- Give every AudioNode a MediaStream, and give every connection
a MediaInputPort.
-- Actually play the audio that reaches the AudioContext's destination node.
-- Force AudioContext to use the audio sample rate defined by MediaStreamGraph.
-- Fix AudioBufferSourceNode's start and stop methods to possibly throw and
take default 'when' parameters.
-- Create an AudioNodeStream for AudioBufferSourceNode and give it a
AudioBufferSourceNodeEngine that does what's needed. Set parameters for
this engine in the start() and stop() methods.
-- Create AudioBuffer::GetThreadSharedChannelsForRate, which is responsible
for stealing the contents of any JS array buffers, and bundling them up
into a thread-shared read-only buffer object which can be used as
part of an AudioChunk. This method will also be responsible for
resampling and caching as necessary.

--HG--
rename : content/media/MediaStreamGraph.cpp => content/media/MediaStreamGraphImpl.h
extra : rebase_source : 9fa0ec0efa304acd6513e427103d6339c78efa53
2013-02-05 12:07:25 +13:00

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1.1 KiB
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/* -*- 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 AudioDestinationNode_h_
#define AudioDestinationNode_h_
#include "AudioNode.h"
namespace mozilla {
namespace dom {
class AudioContext;
/**
* Need to have an nsWrapperCache on AudioDestinationNodes since
* AudioContext.destination returns them.
*/
class AudioDestinationNode : public AudioNode,
public nsWrapperCache
{
public:
AudioDestinationNode(AudioContext* aContext, MediaStreamGraph* aGraph);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(AudioDestinationNode,
AudioNode)
virtual JSObject* WrapObject(JSContext* aCx, JSObject* aScope,
bool* aTriedToWrap);
virtual uint32_t NumberOfOutputs() const MOZ_FINAL MOZ_OVERRIDE
{
return 0;
}
};
}
}
#endif