--- /dev/null
+/* GStreamer
+ *
+ * Copyright (c) 2016 Stian Selnes <stian@pexip.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+#include <gst/check/gstharness.h>
+#include <gst/check/gstcheck.h>
+#include <gst/video/video.h>
+
+GST_START_TEST (test_encode_lag_in_frames)
+{
+ GstHarness *h = gst_harness_new_parse ("vp9enc lag-in-frames=5 cpu-used=8 "
+ "deadline=1");
+ gst_harness_add_src_parse (h, "videotestsrc is-live=true pattern=black ! "
+ "capsfilter caps=\"video/x-raw,width=320,height=240,framerate=25/1\"",
+ TRUE);
+
+ /* Push 20 buffers into the encoder */
+ fail_unless_equals_int (GST_FLOW_OK,
+ gst_harness_src_crank_and_push_many (h, 20, 20));
+
+ /* Only 5 buffers are allowed to be queued now */
+ fail_unless (gst_harness_buffers_received (h) > 15);
+
+ /* EOS will cause the remaining buffers to be drained */
+ fail_unless (gst_harness_push_event (h, gst_event_new_eos ()));
+ fail_unless_equals_int (gst_harness_buffers_received (h), 20);
+
+ for (gint i = 0; i < 20; i++) {
+ GstBuffer *buffer = gst_harness_pull (h);
+
+ if (i == 0)
+ fail_if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DELTA_UNIT));
+
+ fail_unless_equals_uint64 (GST_BUFFER_TIMESTAMP (buffer),
+ gst_util_uint64_scale (i, GST_SECOND, 25));
+ fail_unless_equals_uint64 (GST_BUFFER_DURATION (buffer),
+ gst_util_uint64_scale (1, GST_SECOND, 25));
+
+ gst_buffer_unref (buffer);
+ }
+
+ gst_harness_teardown (h);
+}
+
+GST_END_TEST;
+
+
+static Suite *
+vp9enc_suite (void)
+{
+ Suite *s = suite_create ("vp9enc");
+ TCase *tc_chain = tcase_create ("general");
+
+ suite_add_tcase (s, tc_chain);
+
+ tcase_add_test (tc_chain, test_encode_lag_in_frames);
+
+ return s;
+}
+
+GST_CHECK_MAIN (vp9enc);