1f55cc942d
This is required for detecting which decoder should be used. Only a small subset of codecs identifiers is added for now
45 lines
1.4 KiB
C++
45 lines
1.4 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/NonnullOwnPtr.h>
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#include <LibCore/EventReceiver.h>
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#include <LibVideo/CodecID.h>
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#include <LibVideo/DecoderError.h>
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#include <LibVideo/Sample.h>
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#include <LibVideo/Track.h>
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namespace Video {
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class Demuxer {
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public:
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virtual ~Demuxer() = default;
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virtual DecoderErrorOr<Vector<Track>> get_tracks_for_type(TrackType type) = 0;
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DecoderErrorOr<NonnullOwnPtr<VideoSample>> get_next_video_sample_for_track(Track track)
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{
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VERIFY(track.type() == TrackType::Video);
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auto sample = TRY(get_next_sample_for_track(track));
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VERIFY(sample->is_video_sample());
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return sample.release_nonnull<VideoSample>();
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}
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virtual DecoderErrorOr<CodecID> get_codec_id_for_track(Track track) = 0;
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// Returns the timestamp of the keyframe that was seeked to.
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// The value is `Optional` to allow the demuxer to decide not to seek so that it can keep its position
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// in the case that the timestamp is closer to the current time than the nearest keyframe.
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virtual DecoderErrorOr<Optional<Duration>> seek_to_most_recent_keyframe(Track track, Duration timestamp, Optional<Duration> earliest_available_sample = OptionalNone()) = 0;
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virtual DecoderErrorOr<Duration> duration() = 0;
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protected:
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virtual DecoderErrorOr<NonnullOwnPtr<Sample>> get_next_sample_for_track(Track track) = 0;
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};
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}
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