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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/. */
#if !defined(AudioSink_h__)
#define AudioSink_h__
#include "mozilla/MozPromise.h"
#include "mozilla/RefPtr.h"
#include "nsISupportsImpl.h"
#include "MediaSink.h"
namespace mozilla {
class MediaData;
template <class T> class MediaQueue;
namespace media {
/*
* Define basic APIs for derived class instance to operate or obtain
* information from it.
*/
class AudioSink {
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(AudioSink)
AudioSink(MediaQueue<MediaData>& aAudioQueue)
: mAudioQueue(aAudioQueue)
{}
typedef MediaSink::PlaybackParams PlaybackParams;
// Return a promise which will be resolved when AudioSink finishes playing,
// or rejected if any error.
virtual RefPtr<GenericPromise> Init(const PlaybackParams& aParams) = 0;
virtual int64_t GetEndTime() const = 0;
virtual int64_t GetPosition() = 0;
// Check whether we've pushed more frames to the audio
// hardware than it has played.
virtual bool HasUnplayedFrames() = 0;
// Shut down the AudioSink's resources.
virtual void Shutdown() = 0;
// Change audio playback setting.
virtual void SetVolume(double aVolume) = 0;
virtual void SetPlaybackRate(double aPlaybackRate) = 0;
virtual void SetPreservesPitch(bool aPreservesPitch) = 0;
// Change audio playback status pause/resume.
virtual void SetPlaying(bool aPlaying) = 0;
protected:
virtual ~AudioSink() {}
virtual MediaQueue<MediaData>& AudioQueue() const {
return mAudioQueue;
}
// To queue audio data (no matter it's plain or encoded or encrypted, depends
// on the subclass)
MediaQueue<MediaData>& mAudioQueue;
};
} // namespace media
} // namespace mozilla
#endif
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