dmaax/ladybird
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Tests/JPEG2000: Add spec example as test case

Browse source 
This tests reading JPEG2000 codestreams that aren't embedded in
the ISOBMFF wrapper. It's also useful for debugging bitstream
internals, since the spec lists expected output for many internal
intermediate results.
This commit is contained in:
Nico Weber 2024-04-18 19:30:31 -04:00 committed by Tim Flynn
parent 0c935f8f42
commit 3568215790
1 changed files with 24 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

24
Tests/LibGfx/TestImageDecoder.cpp
View file

@ -580,6 +580,30 @@ TEST_CASE(test_jpeg_malformed_frame)
}
}
TEST_CASE(test_jpeg2000_spec_annex_j_10)
{
// J.10 An example of decoding showing intermediate steps
// clang-format off
constexpr Array data = to_array<u8>({
0xFF, 0x4F, 0xFF, 0x51, 0x00, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x09,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x09,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x07, 0x01, 0x01, 0xFF, 0x5C, 0x00,
0x07, 0x40, 0x40, 0x48, 0x48, 0x50, 0xFF, 0x52, 0x00, 0x0C, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
0x04, 0x04, 0x00, 0x01, 0xFF, 0x90, 0x00, 0x0A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1E, 0x00, 0x01,
0xFF, 0x93, 0xC7, 0xd4, 0x0C, 0x01, 0x8F, 0x0D, 0xC8, 0x75, 0x5D, 0xC0, 0x7C, 0x21, 0x80, 0x0F,
0xB1, 0x76, 0xFF, 0xD9,
});
// clang-format on
auto plugin_decoder = TRY_OR_FAIL(Gfx::JPEG2000ImageDecoderPlugin::create(data));
EXPECT_EQ(plugin_decoder->size(), Gfx::IntSize(1, 9));
// FIXME: Do something with this.
// For now, this is useful for debugging:
// `Build/lagom/bin/TestImageDecoder test_jpeg2000_spec_annex_j_10` prints internal state with JPEG2000_DEBUG=1.
(void)plugin_decoder->frame(0);
}
TEST_CASE(test_jpeg2000_simple)
{
auto file = TRY_OR_FAIL(Core::MappedFile::map(TEST_INPUT("jpeg2000/simple.jp2"sv)));