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114 lines
4.3 KiB
C++
114 lines
4.3 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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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla code.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2010
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* David Humphrey <david.humphrey@senecac.on.ca>
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* Yury Delendik
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsAudioAvailableEventManager_h__
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#define nsAudioAvailableEventManager_h__
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#include "nsCOMPtr.h"
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#include "nsIRunnable.h"
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#include "nsBuiltinDecoder.h"
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#include "nsBuiltinDecoderReader.h"
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using namespace mozilla;
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class nsAudioAvailableEventManager
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{
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public:
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nsAudioAvailableEventManager(nsBuiltinDecoder* aDecoder);
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~nsAudioAvailableEventManager();
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// Initialize the event manager with audio metadata. Called before
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// audio begins to get queued or events are dispatched.
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void Init(PRUint32 aChannels, PRUint32 aRate);
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// Dispatch pending MozAudioAvailable events in the queue. Called
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// from the state machine thread.
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void DispatchPendingEvents(PRUint64 aCurrentTime);
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// Queues audio sample data and re-packages it into equal sized
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// framebuffers. Called from the audio thread.
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void QueueWrittenAudioData(SoundDataValue* aAudioData,
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PRUint32 aAudioDataLength,
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PRUint64 aEndTimeSampleOffset);
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// Clears the queue of any existing events. Called from both the state
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// machine and audio threads.
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void Clear();
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// Fires one last event for any extra samples that didn't fit in a whole
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// framebuffer. This is meant to be called only once when the audio finishes.
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// Called from the state machine thread.
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void Drain(PRUint64 aTime);
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// Sets the size of the signal buffer.
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// Called from the main and the state machine thread.
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void SetSignalBufferLength(PRUint32 aLength);
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private:
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// The decoder associated with the event manager. The event manager shares
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// the same lifetime as the decoder (the decoder holds a reference to the
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// manager).
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nsBuiltinDecoder* mDecoder;
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// The number of samples per second.
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float mSamplesPerSecond;
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// A buffer for audio data to be dispatched in DOM events.
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nsAutoArrayPtr<float> mSignalBuffer;
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// The current size of the signal buffer, may change due to DOM calls.
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PRUint32 mSignalBufferLength;
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// The size of the new signal buffer, may change due to DOM calls.
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PRUint32 mNewSignalBufferLength;
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// The position of the first available item in mSignalBuffer
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PRUint32 mSignalBufferPosition;
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// The MozAudioAvailable events to be dispatched. This queue is shared
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// between the state machine and audio threads.
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nsTArray< nsCOMPtr<nsIRunnable> > mPendingEvents;
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// ReentrantMonitor for shared access to mPendingEvents queue or
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// buffer length.
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ReentrantMonitor mReentrantMonitor;
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};
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#endif
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