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LibGfx: Add initial ISO BMFF parsing and a utility to print file info

Currently, the `isobmff` utility will only print the media file type
info from the FileTypeBox (major brand and compatible brands), as well
as the names and sizes of top-level boxes.
This commit is contained in:
Zaggy1024 2023-02-18 17:46:27 -06:00 committed by Sam Atkins
parent 9caa0bda7d
commit 66c9696687
13 changed files with 510 additions and 0 deletions

View file

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/*
* Copyright (c) 2023, Gregory Bertilson <Zaggy1024@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Reader.h"
namespace Gfx::ISOBMFF {
ErrorOr<Reader> Reader::create(MaybeOwned<SeekableStream> stream)
{
return Reader(move(stream));
}
ErrorOr<BoxList> Reader::read_entire_file()
{
BoxList top_level_boxes;
while (!m_stream->is_eof()) {
auto box_header = TRY(read_box_header(*m_stream));
BoxStream box_stream { *m_stream, box_header.contents_size };
switch (box_header.type) {
case BoxType::FileTypeBox:
TRY(top_level_boxes.try_append(TRY(FileTypeBox::create_from_stream(box_stream))));
break;
default:
TRY(top_level_boxes.try_append(TRY(UnknownBox::create_from_stream(box_header.type, box_stream))));
break;
}
if (!box_stream.is_eof())
return Error::from_string_literal("Reader did not consume all data");
}
return top_level_boxes;
}
}