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LibMedia: Demux videos with FFmpeg

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This gives us access to container types other than Matroska, the
biggest one being MP4.
This commit is contained in:
Luke Wilde 2025-03-10 14:54:02 +00:00 • committed by Alexander Kalenik
commit b789ba5e5f
Notes: github-actions[bot] 2025-03-13 18:34:55 +00:00
12 changed files with 358 additions and 29 deletions
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50
Libraries/LibMedia/FFmpeg/FFmpegDemuxer.h Normal file
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/*
* Copyright (c) 2025, Luke Wilde <luke@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <AK/NonnullOwnPtr.h>
#include <LibMedia/Demuxer.h>
#include <LibMedia/FFmpeg/FFmpegIOContext.h>
extern "C" {
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
}
namespace Media::FFmpeg {
class FFmpegDemuxer : public Demuxer {
public:
static ErrorOr<NonnullOwnPtr<FFmpegDemuxer>> create(NonnullOwnPtr<SeekableStream> stream);
FFmpegDemuxer(NonnullOwnPtr<SeekableStream> stream, NonnullOwnPtr<Media::FFmpeg::FFmpegIOContext>);
virtual ~FFmpegDemuxer() override;
virtual DecoderErrorOr<Vector<Track>> get_tracks_for_type(TrackType type) override;
virtual DecoderErrorOr<Optional<AK::Duration>> seek_to_most_recent_keyframe(Track track, AK::Duration timestamp, Optional<AK::Duration> earliest_available_sample = OptionalNone()) override;
virtual DecoderErrorOr<AK::Duration> duration(Track track) override;
virtual DecoderErrorOr<CodecID> get_codec_id_for_track(Track track) override;
virtual DecoderErrorOr<ReadonlyBytes> get_codec_initialization_data_for_track(Track track) override;
virtual DecoderErrorOr<Sample> get_next_sample_for_track(Track track) override;
private:
DecoderErrorOr<AK::Duration> duration_of_track_in_milliseconds(Track const& track);
NonnullOwnPtr<SeekableStream> m_stream;
AVCodecContext* m_codec_context { nullptr };
AVFormatContext* m_format_context { nullptr };
NonnullOwnPtr<Media::FFmpeg::FFmpegIOContext> m_io_context;
AVPacket* m_packet { nullptr };
};
}