The vaapisink plugin to support overlay requires the application
to provide the proper context. If you don't do so the plugin will
cause a crash of the application.
To avoid possible thread errors from X11 create a new Display
connection to pass to vaapisink.
Signed-off-by: Frediano Ziglio <fziglio@xxxxxxxxxx>
---
To test it probably you'll have to remove the gstreamer registry,
usually in ~/.cache/gstreamer-1.0/registry.x86_64.bin.
Changes since v1:
- updated to master;
- use a different X11 connection as discussed in a previous thread;
- remove some comments, now obsoleted;
- fixed direct X11 link, now code is in spice-widget (as it should be);
- better libva linking, using now build systems.
---
configure.ac | 2 ++
meson.build | 1 +
src/Makefile.am | 2 ++
src/channel-display-gst.c | 14 -------------
src/spice-widget.c | 42 +++++++++++++++++++++++++++++++++++++++
5 files changed, 47 insertions(+), 14 deletions(-)
diff --git a/configure.ac b/configure.ac
index 8c5c4d38..54a86681 100644
--- a/configure.ac
+++ b/configure.ac
@@ -175,6 +175,8 @@ PKG_CHECK_MODULES(GTHREAD, gthread-2.0)
PKG_CHECK_MODULES(JSON, json-glib-1.0)
+PKG_CHECK_MODULES(LIBVA, libva-x11)
+
AC_ARG_ENABLE([webdav],
AS_HELP_STRING([--enable-webdav=@<:@auto/yes/no@:>@],
[Enable webdav support @<:@default=auto@:>@]),
diff --git a/meson.build b/meson.build
index 37377680..8ab32de5 100644
--- a/meson.build
+++ b/meson.build
@@ -134,6 +134,7 @@ if d.found()
if host_machine.system() != 'windows'
spice_gtk_deps += dependency('epoxy')
spice_gtk_deps += dependency('x11')
+ spice_gtk_deps += dependency('libva-x11')
endif
spice_gtk_has_gtk = true
endif
diff --git a/src/Makefile.am b/src/Makefile.am
index b876530c..784b18d0 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -89,6 +89,7 @@ SPICE_COMMON_CPPFLAGS = \
$(GUDEV_CFLAGS) \
$(SOUP_CFLAGS) \
$(PHODAV_CFLAGS) \
+ $(LIBVA_CFLAGS) \
$(X11_CFLAGS) \
$(LZ4_CFLAGS) \
$(NULL)
@@ -112,6 +113,7 @@ SPICE_GTK_LIBADD_COMMON = \
$(CAIRO_LIBS) \
$(X11_LIBS) \
$(LIBM) \
+ $(LIBVA_LIBS) \
$(NULL)
SPICE_GTK_SOURCES_COMMON = \
diff --git a/src/channel-display-gst.c b/src/channel-display-gst.c
index 2f556fe4..01ee83cb 100644
--- a/src/channel-display-gst.c
+++ b/src/channel-display-gst.c
@@ -406,22 +406,8 @@ static gboolean create_pipeline(SpiceGstDecoder *decoder)
} else {
/* handle has received, it means playbin will render directly into
* widget using the gstvideooverlay interface instead of app-sink.
- * Also avoid using vaapisink if exist since vaapisink could be
- * buggy when it is combined with playbin. changing its rank to
- * none will make playbin to avoid of using it.
*/
- GstRegistry *registry = NULL;
- GstPluginFeature *vaapisink = NULL;
-
SPICE_DEBUG("Video is presented using gstreamer's GstVideoOverlay interface");
- registry = gst_registry_get();
- if (registry) {
- vaapisink = gst_registry_lookup_feature(registry, "vaapisink");
- }
- if (vaapisink) {
- gst_plugin_feature_set_rank(vaapisink, GST_RANK_NONE);
- gst_object_unref(vaapisink);
- }
}
g_signal_connect(playbin, "source-setup", G_CALLBACK(app_source_setup), decoder);
diff --git a/src/spice-widget.c b/src/spice-widget.c
index af0301c1..a0763fe6 100644
--- a/src/spice-widget.c
+++ b/src/spice-widget.c
@@ -28,6 +28,7 @@
#ifdef GDK_WINDOWING_X11
#include <X11/Xlib.h>
#include <gdk/gdkx.h>
+#include <va/va_x11.h>
#endif
#ifdef G_OS_WIN32
#include <windows.h>
@@ -2592,6 +2593,47 @@ static void gst_sync_bus_call(GstBus *bus, GstMessage *msg, SpiceDisplay *displa
}
break;
}
+ case GST_MESSAGE_NEED_CONTEXT:
+ {
+ const gchar *context_type;
+
+ gst_message_parse_context_type(msg, &context_type);
+ g_debug("got need context %s from %s", context_type, GST_MESSAGE_SRC_NAME(msg));
+
+#ifdef GDK_WINDOWING_X11
+ if (g_strcmp0(context_type, "gst.vaapi.app.Display") == 0) {
+ static Display *x11_display = NULL;
+ static VADisplay va_display = NULL;
+
+ // note that if VAAPI do not get the context for the
+ // overlay it crashes the entire program!
+ GdkDisplay *display = gdk_display_get_default();
+ g_assert_nonnull(display);
+
+ // Compute display pointers
+ if (!x11_display && GDK_IS_X11_DISPLAY(display)) {
+ x11_display = gdk_x11_display_get_xdisplay(display);
+ // for thread problems we need a different Display,
+ // VAAPI access the Display from another thread
+ x11_display = XOpenDisplay(XDisplayString(x11_display));
+ g_assert_nonnull(x11_display);
+ va_display = vaGetDisplay(x11_display);
+ g_assert_nonnull(va_display);
+ }
+
+ GstContext *context = gst_context_new("gst.vaapi.app.Display", FALSE);
+ GstStructure *structure = gst_context_writable_structure(context);
+ if (x11_display) {
+ gst_structure_set(structure, "x11-display", G_TYPE_POINTER, x11_display, NULL);
+ }
+ gst_structure_set(structure, "va-display", G_TYPE_POINTER, va_display, NULL);
+
+ gst_element_set_context(GST_ELEMENT(msg->src), context);
+ gst_context_unref(context);
+ }
+#endif
+ break;
+ }
default:
/* not being handled */
break;
--
2.20.1
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