--- /dev/null
+#include <stdlib.h>
+
+#include <X11/Xlib.h>
+
+#include <gdk/gdk.h>
+#if defined (GDK_WINDOWING_X11)
+#include <gdk/gdkx.h>
+#else
+#error "Only X11 is supported so far"
+#endif
+
+#include <gtk/gtk.h>
+
+#include <gst/gst.h>
+#include <gst/app/gstappsink.h>
+#include <gst/video/video.h>
+
+#include <va/va_x11.h>
+
+#define GST_MAP_VA (GST_MAP_FLAG_LAST << 1)
+
+static gchar **INPUT_FILES = NULL;
+
+struct _app
+{
+ GtkWidget *window;
+ GtkWidget *video;
+ GstElement *pipeline;
+ GstSample *sample;
+ GMutex mutex;
+ VADisplay va_dpy;
+};
+
+static GstBusSyncReply
+context_handler (GstBus * bus, GstMessage * msg, gpointer data)
+{
+ struct _app *app = data;
+ const gchar *context_type;
+
+ if (GST_MESSAGE_TYPE (msg) != GST_MESSAGE_NEED_CONTEXT)
+ return GST_BUS_DROP;
+
+ gst_message_parse_context_type (msg, &context_type);
+ gst_println ("got need context %s", context_type);
+
+ if (g_strcmp0 (context_type, "gst.va.display.handle") == 0) {
+ GstContext *context;
+ GstStructure *s;
+
+ context = gst_context_new ("gst.va.display.handle", TRUE);
+ s = gst_context_writable_structure (context);
+ gst_structure_set (s, "va-display", G_TYPE_POINTER, app->va_dpy, NULL);
+ gst_element_set_context (GST_ELEMENT (msg->src), context);
+ }
+
+ return GST_BUS_DROP;
+}
+
+static void
+delete_event_cb (GtkWidget * widget, GdkEvent * event, gpointer data)
+{
+ struct _app *app = data;
+
+ gst_element_set_state (app->pipeline, GST_STATE_NULL);
+
+ gtk_main_quit ();
+}
+
+static gboolean
+draw_unlocked (GtkWidget * widget, struct _app *app)
+{
+ GstBuffer *buffer;
+ GstCaps *caps;
+ GstMapInfo map_info;
+ GstVideoInfo vinfo;
+ VASurfaceID surface;
+ VAStatus va_status;
+ GstVideoRectangle src, dst, res;
+ gboolean ret = FALSE;
+
+ buffer = gst_sample_get_buffer (app->sample);
+ caps = gst_sample_get_caps (app->sample);
+
+ if (!gst_video_info_from_caps (&vinfo, caps))
+ return FALSE;
+
+ src.x = 0;
+ src.y = 0;
+ src.w = GST_VIDEO_INFO_WIDTH (&vinfo);
+ src.h = GST_VIDEO_INFO_HEIGHT (&vinfo);
+
+ if (!gst_buffer_map (buffer, &map_info, GST_MAP_READ | GST_MAP_VA))
+ return FALSE;
+
+ surface = (*(VASurfaceID *) map_info.data);
+ if (surface == VA_INVALID_ID)
+ goto bail;
+
+ dst.x = 0;
+ dst.y = 0;
+ dst.w = gtk_widget_get_allocated_width (widget);
+ dst.h = gtk_widget_get_allocated_height (widget);
+
+ gst_video_sink_center_rect (src, dst, &res, TRUE);
+
+ va_status = vaPutSurface (app->va_dpy, surface,
+ GDK_WINDOW_XID (gtk_widget_get_window (widget)),
+ src.x, src.y, src.w, src.h, res.x, res.y, res.w, res.h, NULL, 0, 0);
+ if (va_status != VA_STATUS_SUCCESS)
+ gst_printerrln ("failed vaPutSurface: %s", vaErrorStr (va_status));
+ else
+ ret = TRUE;
+
+bail:
+ gst_buffer_unmap (buffer, &map_info);
+
+ return ret;
+}
+
+static gboolean
+redraw_cb (gpointer data)
+{
+ GtkWidget *video = data;
+
+ gtk_widget_queue_draw (video);
+ return G_SOURCE_REMOVE;
+}
+
+static gboolean
+draw_cb (GtkWidget * widget, cairo_t * cr, gpointer data)
+{
+ struct _app *app = data;
+ gboolean ret = TRUE;
+
+ g_mutex_lock (&app->mutex);
+ if (app->sample)
+ ret = draw_unlocked (widget, app);
+ g_mutex_unlock (&app->mutex);
+
+ if (!ret)
+ gst_printerrln ("failed to paint frame");
+
+ return FALSE;
+}
+
+static void
+build_ui (struct _app *app)
+{
+ app->window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
+ gtk_window_set_title (GTK_WINDOW (app->window), "VA X11 render");
+ g_signal_connect (app->window, "delete-event", G_CALLBACK (delete_event_cb),
+ app);
+
+ app->video = gtk_drawing_area_new ();
+ g_signal_connect (app->video, "draw", G_CALLBACK (draw_cb), app);
+
+ gtk_container_add (GTK_CONTAINER (app->window), app->video);
+
+ gtk_widget_show_all (app->window);
+}
+
+static GstFlowReturn
+new_sample_cb (GstAppSink * sink, gpointer data)
+{
+ struct _app *app = data;
+
+ g_mutex_lock (&app->mutex);
+ if (app->sample)
+ gst_sample_unref (app->sample);
+ app->sample = gst_app_sink_pull_sample (sink);
+ g_mutex_unlock (&app->mutex);
+
+ g_idle_add (redraw_cb, app->video);
+
+ return GST_FLOW_OK;
+}
+
+static void
+end_stream_cb (GstBus * bus, GstMessage * msg, gpointer data)
+{
+ switch (GST_MESSAGE_TYPE (msg)) {
+ case GST_MESSAGE_ERROR:{
+ gchar *debug = NULL;
+ GError *err = NULL;
+
+ gst_message_parse_error (msg, &err, &debug);
+ gst_printerrln ("GStreamer error: %s\n%s", err->message,
+ debug ? debug : "");
+ if (debug)
+ g_free (debug);
+ if (err)
+ g_error_free (err);
+ break;
+ }
+ default:
+ break;
+ }
+
+ gtk_main_quit ();
+}
+
+static gboolean
+build_pipeline (struct _app *app)
+{
+ GstElement *src, *sink;
+ GstCaps *caps;
+ GstBus *bus;
+ GstAppSinkCallbacks callbacks = {
+ .new_sample = new_sample_cb,
+ };
+ GError *err = NULL;
+
+ app->pipeline = gst_parse_launch ("filesrc name=src ! "
+ "parsebin ! vah264dec ! appsink name=sink", &err);
+ if (err) {
+ gst_printerrln ("Couldn't create pipeline: %s", err->message);
+ g_error_free (err);
+ return FALSE;
+ }
+
+ src = gst_bin_get_by_name (GST_BIN (app->pipeline), "src");
+ g_object_set (src, "location", INPUT_FILES[0], NULL);
+ gst_object_unref (src);
+
+ sink = gst_bin_get_by_name (GST_BIN (app->pipeline), "sink");
+ caps = gst_caps_from_string ("video/x-raw (memory:VAMemory)");
+ g_object_set (sink, "caps", caps, NULL);
+ gst_caps_unref (caps);
+ gst_app_sink_set_callbacks (GST_APP_SINK (sink), &callbacks, app, NULL);
+ gst_object_unref (src);
+
+ bus = gst_pipeline_get_bus (GST_PIPELINE (app->pipeline));
+ gst_bus_add_signal_watch (bus);
+ g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb), app);
+ gst_bus_set_sync_handler (bus, context_handler, app, NULL);
+ gst_object_unref (bus);
+
+ return TRUE;
+}
+
+static gboolean
+parse_arguments (int *argc, char ***argv)
+{
+ GOptionContext *ctxt;
+ GError *err = NULL;
+ const GOptionEntry options[] = {
+ {G_OPTION_REMAINING, 0, G_OPTION_FLAG_NONE, G_OPTION_ARG_FILENAME_ARRAY,
+ &INPUT_FILES, "H.264 video files to play", NULL},
+ {NULL,},
+ };
+
+ ctxt = g_option_context_new ("— VA X11 render");
+ g_option_context_add_main_entries (ctxt, options, NULL);
+ g_option_context_add_group (ctxt, gtk_get_option_group (TRUE));
+ g_option_context_add_group (ctxt, gst_init_get_option_group ());
+
+ if (!g_option_context_parse (ctxt, argc, argv, &err)) {
+ gst_printerrln ("option parsing failed: %s", err->message);
+ g_error_free (err);
+ return FALSE;
+ }
+
+ g_option_context_free (ctxt);
+ return TRUE;
+}
+
+int
+main (int argc, char **argv)
+{
+ GdkDisplay *gdk_dpy;
+ VAStatus va_status;
+ struct _app app = { NULL, };
+ int maj, min, ret = EXIT_FAILURE;
+
+#if defined (GDK_WINDOWING_X11)
+ XInitThreads ();
+#endif
+
+ if (!parse_arguments (&argc, &argv))
+ return EXIT_FAILURE;
+
+ if (!(INPUT_FILES && INPUT_FILES[0]))
+ goto gtk_failed;
+
+ gdk_dpy = gdk_display_get_default ();
+ if (!GDK_IS_X11_DISPLAY (gdk_dpy)) {
+ gst_printerrln ("This example is only for native X11");
+ goto gtk_failed;
+ }
+
+ g_mutex_init (&app.mutex);
+
+ if (!build_pipeline (&app))
+ goto gst_failed;
+
+ app.va_dpy = vaGetDisplay (GDK_DISPLAY_XDISPLAY (gdk_dpy));
+ va_status = vaInitialize (app.va_dpy, &maj, &min);
+ if (va_status != VA_STATUS_SUCCESS) {
+ gst_printerrln ("failed to initialize VA: %s", vaErrorStr (va_status));
+ goto va_failed;
+ }
+
+ build_ui (&app);
+
+ gst_element_set_state (app.pipeline, GST_STATE_PLAYING);
+
+ gtk_main ();
+
+ ret = EXIT_SUCCESS;
+
+va_failed:
+ vaTerminate (app.va_dpy);
+ gst_object_unref (app.pipeline);
+gst_failed:
+ g_mutex_clear (&app.mutex);
+gtk_failed:
+ g_strfreev (INPUT_FILES);
+ gst_deinit ();
+
+ return ret;
+}