95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef NEXTFRAME_SEEK_TASK_H
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#define NEXTFRAME_SEEK_TASK_H
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#include "SeekTask.h"
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#include "MediaDecoderReader.h"
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namespace mozilla {
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namespace media {
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/*
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* While invoking a NextFrameSeekTask, we don't know the seek target time, what
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* we know is the media's currant position. We use the media's currant position
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* to find out what the next frame is, by traversing through the video queue or
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* asking the decoder to decode more video frames. Once we confirm the next
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* frame, we then know the target time of the NextFrameSeekTask and we update it
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* so that the MDSM will be able to update the media element's position.
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*/
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class NextFrameSeekTask final : public SeekTask {
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public:
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NextFrameSeekTask(const void* aDecoderID,
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AbstractThread* aThread,
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MediaDecoderReaderWrapper* aReader,
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const SeekTarget& aTarget,
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const MediaInfo& aInfo,
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const media::TimeUnit& aDuration,
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int64_t aCurrentTime,
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MediaQueue<MediaData>& aAudioQueue,
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MediaQueue<MediaData>& aVideoQueue);
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void Discard() override;
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RefPtr<SeekTaskPromise> Seek(const media::TimeUnit& aDuration) override;
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bool NeedToResetMDSM() const override;
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private:
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~NextFrameSeekTask();
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void RequestVideoData();
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bool NeedMoreVideo() const;
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bool IsVideoRequestPending() const;
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bool IsAudioSeekComplete() const;
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bool IsVideoSeekComplete() const;
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void MaybeFinishSeek();
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void OnAudioDecoded(MediaData* aAudioSample);
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void OnAudioNotDecoded(const MediaResult& aError);
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void OnVideoDecoded(MediaData* aVideoSample);
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void OnVideoNotDecoded(const MediaResult& aError);
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void SetCallbacks();
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void CancelCallbacks();
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// Update the seek target's time before resolving this seek task, the updated
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// time will be used in the MDSM::SeekCompleted() to update the MDSM's position.
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void UpdateSeekTargetTime();
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/*
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* Data shared with MDSM.
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*/
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MediaQueue<MediaData>& mAudioQueue;
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MediaQueue<MediaData>& mVideoQueue;
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/*
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* Internal state.
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*/
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const int64_t mCurrentTime;
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media::TimeUnit mDuration;
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MediaEventListener mAudioCallback;
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MediaEventListener mVideoCallback;
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MediaEventListener mAudioWaitCallback;
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MediaEventListener mVideoWaitCallback;
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};
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} // namespace media
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} // namespace mozilla
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#endif /* NEXTFRAME_SEEK_TASK_H */
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