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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 NEXTFRAME_SEEK_TASK_H
#define NEXTFRAME_SEEK_TASK_H
#include "SeekTask.h"
#include "MediaDecoderReader.h"
namespace mozilla {
namespace media {
/*
* While invoking a NextFrameSeekTask, we don't know the seek target time, what
* we know is the media's currant position. We use the media's currant position
* to find out what the next frame is, by traversing through the video queue or
* asking the decoder to decode more video frames. Once we confirm the next
* frame, we then know the target time of the NextFrameSeekTask and we update it
* so that the MDSM will be able to update the media element's position.
*/
class NextFrameSeekTask final : public SeekTask {
public:
NextFrameSeekTask(const void* aDecoderID,
AbstractThread* aThread,
MediaDecoderReaderWrapper* aReader,
const SeekTarget& aTarget,
const MediaInfo& aInfo,
const media::TimeUnit& aDuration,
int64_t aCurrentTime,
MediaQueue<MediaData>& aAudioQueue,
MediaQueue<MediaData>& aVideoQueue);
void Discard() override;
RefPtr<SeekTaskPromise> Seek(const media::TimeUnit& aDuration) override;
bool NeedToResetMDSM() const override;
private:
~NextFrameSeekTask();
void RequestVideoData();
bool NeedMoreVideo() const;
bool IsVideoRequestPending() const;
bool IsAudioSeekComplete() const;
bool IsVideoSeekComplete() const;
void MaybeFinishSeek();
void OnAudioDecoded(MediaData* aAudioSample);
void OnAudioNotDecoded(const MediaResult& aError);
void OnVideoDecoded(MediaData* aVideoSample);
void OnVideoNotDecoded(const MediaResult& aError);
void SetCallbacks();
void CancelCallbacks();
// Update the seek target's time before resolving this seek task, the updated
// time will be used in the MDSM::SeekCompleted() to update the MDSM's position.
void UpdateSeekTargetTime();
/*
* Data shared with MDSM.
*/
MediaQueue<MediaData>& mAudioQueue;
MediaQueue<MediaData>& mVideoQueue;
/*
* Internal state.
*/
const int64_t mCurrentTime;
media::TimeUnit mDuration;
MediaEventListener mAudioCallback;
MediaEventListener mVideoCallback;
MediaEventListener mAudioWaitCallback;
MediaEventListener mVideoWaitCallback;
};
} // namespace media
} // namespace mozilla
#endif /* NEXTFRAME_SEEK_TASK_H */
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