mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-01 06:35:42 +00:00
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
/* -*- 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 AudioAvailableEventManager_h__
|
|
#define AudioAvailableEventManager_h__
|
|
|
|
#include "nsAutoPtr.h"
|
|
#include "nsTArray.h"
|
|
#include "AudioSampleFormat.h"
|
|
#include "mozilla/ReentrantMonitor.h"
|
|
|
|
class nsIRunnable;
|
|
template <class T> class nsCOMPtr;
|
|
|
|
namespace mozilla {
|
|
|
|
class MediaDecoder;
|
|
|
|
class AudioAvailableEventManager
|
|
{
|
|
public:
|
|
AudioAvailableEventManager(MediaDecoder* aDecoder);
|
|
~AudioAvailableEventManager();
|
|
|
|
// Initialize the event manager with audio metadata. Called before
|
|
// audio begins to get queued or events are dispatched.
|
|
void Init(uint32_t aChannels, uint32_t aRate);
|
|
|
|
// Dispatch pending MozAudioAvailable events in the queue. Called
|
|
// from the state machine thread.
|
|
void DispatchPendingEvents(uint64_t aCurrentTime);
|
|
|
|
// Queues audio sample data and re-packages it into equal sized
|
|
// framebuffers. Called from the audio thread.
|
|
void QueueWrittenAudioData(AudioDataValue* aAudioData,
|
|
uint32_t aAudioDataLength,
|
|
uint64_t aEndTimeSampleOffset);
|
|
|
|
// Clears the queue of any existing events. Called from both the state
|
|
// machine and audio threads.
|
|
void Clear();
|
|
|
|
// Fires one last event for any extra samples that didn't fit in a whole
|
|
// framebuffer. This is meant to be called only once when the audio finishes.
|
|
// Called from the state machine thread.
|
|
void Drain(uint64_t aTime);
|
|
|
|
// Sets the size of the signal buffer.
|
|
// Called from the main and the state machine thread.
|
|
void SetSignalBufferLength(uint32_t aLength);
|
|
|
|
// Called by the media element to notify the manager that there is a
|
|
// listener on the "MozAudioAvailable" event, and that we need to dispatch
|
|
// such events. Called from the main thread.
|
|
void NotifyAudioAvailableListener();
|
|
|
|
private:
|
|
// The decoder associated with the event manager. The event manager shares
|
|
// the same lifetime as the decoder (the decoder holds a reference to the
|
|
// manager).
|
|
MediaDecoder* mDecoder;
|
|
|
|
// The number of samples per second.
|
|
float mSamplesPerSecond;
|
|
|
|
// A buffer for audio data to be dispatched in DOM events.
|
|
nsAutoArrayPtr<float> mSignalBuffer;
|
|
|
|
// The current size of the signal buffer, may change due to DOM calls.
|
|
uint32_t mSignalBufferLength;
|
|
|
|
// The size of the new signal buffer, may change due to DOM calls.
|
|
uint32_t mNewSignalBufferLength;
|
|
|
|
// The position of the first available item in mSignalBuffer
|
|
uint32_t mSignalBufferPosition;
|
|
|
|
// The MozAudioAvailable events to be dispatched. This queue is shared
|
|
// between the state machine and audio threads.
|
|
nsTArray< nsCOMPtr<nsIRunnable> > mPendingEvents;
|
|
|
|
// ReentrantMonitor for shared access to mPendingEvents queue or
|
|
// buffer length.
|
|
ReentrantMonitor mReentrantMonitor;
|
|
|
|
// True if something in the owning document has a listener on the
|
|
// "MozAudioAvailable" event. If not, we don't need to bother copying played
|
|
// audio data and dispatching the event. Synchronized by mReentrantMonitor.
|
|
bool mHasListener;
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|