1 files changed, 116 insertions, 0 deletions
diff --git a/test/packet_queue_test.cc b/test/packet_queue_test.cc
new file mode 100644
index 000000000..ae1cc5b22
--- /dev/null
+++ b/test/packet_queue_test.cc
@@ -0,0 +1,116 @@
+/*
+    Copyright (C) 2026 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "lib/subtitle_sync_packet_queue.h"
+extern "C" {
+#include <libavcodec/packet.h>
+}
+#include <boost/test/unit_test.hpp>
+
+
+BOOST_AUTO_TEST_CASE(subtitle_sync_packet_queue_test)
+{
+	SubtitleSyncPacketQueue queue;
+	std::vector<std::pair<AVPacket*, PacketQueue::Type>> expected;
+
+	auto add_video = [&queue, &expected]() {
+		auto packet = av_packet_alloc();
+		queue.add(packet, PacketQueue::Type::VIDEO);
+		expected.push_back(std::make_pair(packet, PacketQueue::Type::VIDEO));
+		return packet;
+	};
+
+	auto add_audio = [&queue, &expected]() {
+		auto packet = av_packet_alloc();
+		queue.add(packet, PacketQueue::Type::AUDIO);
+		expected.push_back(std::make_pair(packet, PacketQueue::Type::AUDIO));
+		return packet;
+	};
+
+	auto add_subtitle = [&queue]() {
+		auto packet = av_packet_alloc();
+		queue.add(packet, PacketQueue::Type::SUBTITLE);
+		return packet;
+	};
+
+	auto check = [&queue](bool flush, std::pair<AVPacket*, PacketQueue::Type> ref) {
+		auto check = queue.get(flush);
+		BOOST_CHECK(check.has_value());
+		BOOST_CHECK(boost::get<AVPacket*>(check->first) == ref.first);
+		BOOST_CHECK(check->second == ref.second);
+	};
+
+	for (int i = 0; i < 24; ++i) {
+		add_video();
+		add_audio();
+		add_audio();
+	}
+
+	BOOST_CHECK(queue.get(false) == boost::none);
+
+	for (int i = 0; i < 23; ++i) {
+		add_video();
+		add_audio();
+		add_audio();
+	}
+
+	BOOST_CHECK(queue.get(false) == boost::none);
+
+	auto iter = expected.begin();
+
+	add_video();
+	check(false, *iter);
+	++iter;
+
+	auto sub1 = add_subtitle();
+	auto sub2 = add_subtitle();
+
+	for (int i = 0; i < 24; ++i) {
+		add_video();
+		add_audio();
+		add_audio();
+	}
+
+	check(false, { sub1, PacketQueue::Type::SUBTITLE });
+	check(false, { sub2, PacketQueue::Type::SUBTITLE });
+
+	for (int i = 0; i < 24; ++i) {
+		check(false, *iter);
+		++iter;
+		check(false, *iter);
+		++iter;
+		check(false, *iter);
+		++iter;
+	}
+
+	for (int i = 0; i < 47; ++i) {
+		check(true, *iter);
+		BOOST_REQUIRE(iter != expected.end());
+		++iter;
+		check(true, *iter);
+		BOOST_REQUIRE(iter != expected.end());
+		++iter;
+		check(true, *iter);
+		BOOST_REQUIRE(iter != expected.end());
+		++iter;
+	}
+}
+