--- /dev/null
+/* GStreamer
+ *
+ * Unit test for d3d11videosink element
+ * Copyright (C) 2023 Alexander Slobodeniuk <aslobodeniuk@fluendo.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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/check/gstcheck.h>
+#include <gst/video/video.h>
+#include <windows.h>
+
+#define WM_FIXTURE_RESTART (WM_USER + 123)
+#define WM_FIXTURE_TRICKY_RESTART (WM_FIXTURE_RESTART + 1)
+
+static struct
+{
+ HWND hwnd;
+ GstElement *pipeline;
+ gboolean ever_started;
+ volatile gboolean stopping;
+} fixture;
+
+static void
+fixture_sleep_approx_ms (guint ms)
+{
+ Sleep (g_random_int_range (0, ms));
+}
+
+static gpointer
+fixture_restart_playback (gpointer data)
+{
+ GST_DEBUG ("Restarting the pipeline");
+ gst_element_set_state (fixture.pipeline, GST_STATE_NULL);
+ GST_DEBUG ("Stopped");
+ gst_element_set_state (fixture.pipeline, GST_STATE_PLAYING);
+ GST_DEBUG ("Started");
+ return NULL;
+}
+
+
+static LRESULT CALLBACK
+test_win32window_window_proc (HWND hwnd, UINT message, WPARAM wParam,
+ LPARAM lParam)
+{
+ switch (message) {
+ case WM_FIXTURE_RESTART:
+ fixture_restart_playback (NULL);
+ break;
+ case WM_FIXTURE_TRICKY_RESTART:
+ /* Synchronous stop, but the sink will have to
+ * release it's internal window asynchronously */
+ g_thread_join (g_thread_new (NULL, fixture_restart_playback, NULL));
+ break;
+ case WM_DESTROY:
+ PostQuitMessage (0);
+ break;
+ default:
+ /* Simulate application load */
+ fixture_sleep_approx_ms (30);
+ return DefWindowProc (hwnd, message, wParam, lParam);
+ }
+ return 0;
+}
+
+static void
+test_win32window_create_window (void)
+{
+ HINSTANCE hinstance = GetModuleHandleA (NULL);
+ WNDCLASSEXA wc;
+ ATOM atom = 0;
+ const gchar *class_name = "d3d11videosink_test";
+
+ GST_DEBUG ("Creating a win32 window");
+ atom = GetClassInfoExA (hinstance, class_name, &wc);
+ if (atom == 0) {
+ ZeroMemory (&wc, sizeof (WNDCLASSEXA));
+ wc.cbSize = sizeof (WNDCLASSEX);
+
+ wc.style = CS_HREDRAW | CS_VREDRAW;
+ wc.lpfnWndProc = test_win32window_window_proc;
+ wc.hInstance = hinstance;
+ wc.hbrBackground = (HBRUSH) (COLOR_WINDOW + 1);
+ wc.lpszClassName = class_name;
+
+ fail_unless (RegisterClassExA (&wc));
+ }
+
+ fixture.hwnd =
+ CreateWindowA (class_name, "d3d11videosink test", WS_OVERLAPPEDWINDOW,
+ CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hinstance, NULL);
+ fail_unless (fixture.hwnd);
+}
+
+static void
+test_win32window_msg_loop (void)
+{
+ MSG msg;
+ while (GetMessage (&msg, NULL, 0, 0)) {
+ TranslateMessage (&msg);
+ DispatchMessage (&msg);
+ }
+}
+
+static gpointer
+test_win32window_resize_thr2 (gpointer data)
+{
+ gint16 length = 0;
+ while (!fixture.stopping) {
+ if ((length += 1) > 164) {
+ length = 0;
+ }
+
+ MoveWindow (fixture.hwnd, 0, 0, length, length, 1);
+ fixture_sleep_approx_ms (10);
+ }
+ return NULL;
+}
+
+static gpointer
+test_win32window_resize_thr1 (gpointer data)
+{
+ gint i;
+ const gint NUM_REPETITIONS = 150;
+
+ GThread *thr = g_thread_new (NULL,
+ test_win32window_resize_thr2, NULL);
+
+ for (i = 0; i < NUM_REPETITIONS; i++) {
+ gst_element_set_state (fixture.pipeline, GST_STATE_PLAYING);
+ /* Pause in playback */
+ fixture_sleep_approx_ms (500);
+
+
+ if (0 == i % 4) {
+ GST_DEBUG ("Scheduling pipeline restart from the window thread");
+ PostMessageA (fixture.hwnd, WM_FIXTURE_RESTART, 0, 0);
+ fixture_sleep_approx_ms (500);
+ }
+
+ if (0 == i % 5) {
+ GST_DEBUG ("Scheduling pipeline restart blocking the window thread");
+ PostMessageA (fixture.hwnd, WM_FIXTURE_TRICKY_RESTART, 0, 0);
+ fixture_sleep_approx_ms (500);
+ }
+
+ gst_element_set_state (fixture.pipeline, GST_STATE_NULL);
+ /* Pause without playback */
+ fixture_sleep_approx_ms (100);
+ }
+
+ fixture.stopping = TRUE;
+ g_thread_join (thr);
+
+ GST_INFO ("Closing the window");
+ PostMessageA (fixture.hwnd, WM_CLOSE, 0, 0);
+ return NULL;
+}
+
+static GstBusSyncReply
+test_win32window_bus_sync_handle (GstBus * bus,
+ GstMessage * message, gpointer data)
+{
+ if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT ||
+ !gst_is_video_overlay_prepare_window_handle_message (message)) {
+ return GST_BUS_PASS;
+ }
+
+ gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY
+ (GST_MESSAGE_SRC (message)), (guintptr) fixture.hwnd);
+ fixture.ever_started = TRUE;
+ return GST_BUS_DROP;
+}
+
+GST_START_TEST (test_win32window_resize)
+{
+ GstBus *bus;
+ GThread *thr;
+
+ GST_INFO ("Start resising test");
+ test_win32window_create_window ();
+
+ fixture.pipeline =
+ gst_parse_launch
+ ("videotestsrc ! video/x-raw, width=128, height=128 ! d3d11videosink sync=false",
+ NULL);
+ bus = gst_element_get_bus (fixture.pipeline);
+ gst_bus_set_sync_handler (bus, test_win32window_bus_sync_handle, NULL, NULL);
+ gst_object_unref (bus);
+ bus = NULL;
+
+ ShowWindow (fixture.hwnd, SW_SHOW);
+ UpdateWindow (fixture.hwnd);
+
+ thr = g_thread_new (NULL, test_win32window_resize_thr1, NULL);
+
+ test_win32window_msg_loop ();
+
+ g_thread_join (thr);
+ gst_object_unref (fixture.pipeline);
+ fixture.hwnd = NULL;
+
+ fail_unless (fixture.ever_started, "videosink didn't request window handle,"
+ "probably it couldn't start");
+ GST_INFO ("resising test ok");
+}
+
+GST_END_TEST;
+
+static Suite *
+d3d11videosink_suite (void)
+{
+ Suite *s = suite_create ("d3d11videosink");
+ TCase *tc_basic = tcase_create ("general");
+
+ suite_add_tcase (s, tc_basic);
+ tcase_add_test (tc_basic, test_win32window_resize);
+
+ return s;
+}
+
+GST_CHECK_MAIN (d3d11videosink);