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LibVideo: Extract video metadata for public-facing video track data

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This copies the video data from the Matroska document into the Track
structure that outside users have access to. Because Track can actually
represent other media types, this is set up such that the Track can hold
metadata for those other types when they are needed.

This is needed for LibWeb's HTMLMediaElement implementation.
This commit is contained in:
Timothy Flynn 2023-04-04 13:18:35 -04:00 • committed by Linus Groh
parent 952808eaaa
commit c978beb18b
2 changed files with 44 additions and 1 deletions
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14
Userland/Libraries/LibVideo/Containers/Matroska/MatroskaDemuxer.cpp
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@ -38,9 +38,21 @@ DecoderErrorOr<Vector<Track>> MatroskaDemuxer::get_tracks_for_type(TrackType typ
Vector<Track> tracks;
TRY(m_reader.for_each_track_of_type(matroska_track_type, [&](TrackEntry const& track_entry) -> DecoderErrorOr<IterationDecision> {
VERIFY(track_entry.track_type() == matroska_track_type);
DECODER_TRY_ALLOC(tracks.try_append(Track(type, track_entry.track_number())));
Track track(type, track_entry.track_number());
switch (type) {
case TrackType::Video:
if (auto video_track = track_entry.video_track(); video_track.has_value())
track.set_video_data({ TRY(duration()), video_track->pixel_width, video_track->pixel_height });
break;
default:
break;
}
DECODER_TRY_ALLOC(tracks.try_append(track));
return IterationDecision::Continue;
}));
return tracks;
}