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https://github.com/RGBCube/serenity
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fd3ffd88ce
Now that we're able to find the nearest keyframe, we can have a fast seeking mode that only seeks to keyframes, so that it doesn't have to also decode inter frames until it reaches the timestamp. The default is still accurate seeking, so that the entire seeking implementation can be tested.
51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*
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* Copyright (c) 2022, Gregory Bertilson <zaggy1024@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/HashMap.h>
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#include <LibVideo/Containers/Demuxer.h>
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#include "Reader.h"
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namespace Video::Matroska {
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class MatroskaDemuxer final : public Demuxer {
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public:
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// FIXME: We should instead accept some abstract data streaming type so that the demuxer
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// can work with non-contiguous data.
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static DecoderErrorOr<NonnullOwnPtr<MatroskaDemuxer>> from_file(StringView filename);
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static DecoderErrorOr<NonnullOwnPtr<MatroskaDemuxer>> from_data(ReadonlyBytes data);
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MatroskaDemuxer(Reader&& reader)
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: m_reader(move(reader))
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{
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}
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DecoderErrorOr<Vector<Track>> get_tracks_for_type(TrackType type) override;
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DecoderErrorOr<Time> seek_to_most_recent_keyframe(Track track, Time timestamp) override;
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DecoderErrorOr<Time> duration() override;
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protected:
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DecoderErrorOr<NonnullOwnPtr<Sample>> get_next_sample_for_track(Track track) override;
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private:
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struct TrackStatus {
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SampleIterator iterator;
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Optional<Block> block {};
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size_t frame_index { 0 };
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};
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DecoderErrorOr<TrackStatus*> get_track_status(Track track);
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Reader m_reader;
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HashMap<Track, TrackStatus> m_track_statuses;
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};
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}
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