Tests/LibVideo: Add a test for Matroska files containing CRC32 elements

Author: https://github.com/Zaggy1024
Commit: https://github.com/SerenityOS/serenity/commit/b94c132dd1
Pull-request: https://github.com/SerenityOS/serenity/pull/19599
Reviewed-by: https://github.com/trflynn89

Tests/LibVideo/CMakeLists.txt

@@ -1,4 +1,5 @@
 set(TEST_SOURCES
+    TestParseMatroska.cpp
     TestVP9Decode.cpp
 )
 
@@ -10,3 +11,4 @@ install(FILES vp9_in_webm.webm DESTINATION usr/Tests/LibVideo)
 install(FILES vp9_4k.webm DESTINATION usr/Tests/LibVideo)
 install(FILES vp9_clamp_reference_mvs.webm DESTINATION usr/Tests/LibVideo)
 install(FILES vp9_oob_blocks.webm DESTINATION usr/Tests/LibVideo)
+install(FILES master_elements_containing_crc32.mkv DESTINATION usr/Tests/LibVideo)

Tests/LibVideo/FILE_LICENSES.md

@@ -1,4 +1,4 @@
-## vp9_clamp_reference_mvs.webm
+## vp9_clamp_reference_mvs.webm & master_elements_containing_crc32.mkv
 
 Licensed under [Creative Commons Attribution 3.0](http://creativecommons.org/licenses/by/3.0/)\
 (c) copyright 2008, Blender Foundation / [www.bigbuckbunny.org](https://www.bigbuckbunny.org)

Tests/LibVideo/TestParseMatroska.cpp

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2023, Gregory Bertilson <zaggy1024@gmail.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibTest/TestCase.h>
+
+#include <LibVideo/Containers/Matroska/Reader.h>
+
+TEST_CASE(master_elements_containing_crc32)
+{
+    auto matroska_reader = MUST(Video::Matroska::Reader::from_file("master_elements_containing_crc32.mkv"sv));
+    u64 video_track = 0;
+    MUST(matroska_reader.for_each_track_of_type(Video::Matroska::TrackEntry::TrackType::Video, [&](Video::Matroska::TrackEntry const& track_entry) -> Video::DecoderErrorOr<IterationDecision> {
+        video_track = track_entry.track_number();
+        return IterationDecision::Break;
+    }));
+    VERIFY(video_track == 1);
+
+    auto iterator = MUST(matroska_reader.create_sample_iterator(video_track));
+    MUST(iterator.next_block());
+    MUST(matroska_reader.seek_to_random_access_point(iterator, Duration::from_seconds(7)));
+    MUST(iterator.next_block());
+}