>
> On 1/15/19 12:22 PM, Frediano Ziglio wrote:
> > 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 v3:
> > - none, add a patch to fix another issue;
> >
> > Changes since v2:
> > - remove hard dependency to libva-x11.
> >
> > 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 | 5 +++++
> > meson.build | 5 +++++
> > src/Makefile.am | 2 ++
> > src/channel-display-gst.c | 14 ------------
> > src/spice-widget.c | 45 +++++++++++++++++++++++++++++++++++++++
> > 5 files changed, 57 insertions(+), 14 deletions(-)
> >
> > diff --git a/configure.ac b/configure.ac
> > index bba13fba..0f69b3c2 100644
> > --- a/configure.ac
> > +++ b/configure.ac
> > @@ -175,6 +175,11 @@ PKG_CHECK_MODULES(GTHREAD, gthread-2.0)
> >
> > PKG_CHECK_MODULES(JSON, json-glib-1.0)
> >
> > +PKG_CHECK_EXISTS([libva-x11], [
> > + PKG_CHECK_MODULES(LIBVA, libva-x11)
> > + AC_DEFINE([HAVE_LIBVA], [1], [Define if libva is available])
> > +])
> > +
> > 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 acd5dcaf..69bbee57 100644
> > --- a/meson.build
> > +++ b/meson.build
> > @@ -134,6 +134,11 @@ if d.found()
> > if host_machine.system() != 'windows'
> > spice_gtk_deps += dependency('epoxy')
> > spice_gtk_deps += dependency('x11')
> > + d = dependency('libva-x11', required: false)
> > + if d.found()
> > + spice_gtk_deps += d
> > + spice_gtk_config_data.set('HAVE_LIBVA', '1')
> > + endif
> > endif
> > spice_gtk_has_gtk = true
> > endif
> > diff --git a/src/Makefile.am b/src/Makefile.am
> > index d1de9473..66884a74 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);
> > - }
> > }
>
>
> I think the support gstcontext for vaapi elements was introduced pretty
> lately
> (if i'm not mistaken 1.13.90) so i guess it worth removing this code
> only in higher
> versions
>
1.13.1. Is there a way to detect the version (better the plugin, not all
GStreamer)? Or a simple check for GStreamer 0.14 would be good?
>
> >
> > 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..69c00558 100644
> > --- a/src/spice-widget.c
> > +++ b/src/spice-widget.c
> > @@ -28,6 +28,9 @@
> > #ifdef GDK_WINDOWING_X11
> > #include <X11/Xlib.h>
>
> > #include <gdk/gdkx.h>
> > +#ifdef HAVE_LIBVA
> > +#include <va/va_x11.h>
> > +#endif
> > #endif
> > #ifdef G_OS_WIN32
> > #include <windows.h>
> > @@ -2592,6 +2595,48 @@ 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);
> > + SPICE_DEBUG("GStreamer: got need context %s from %s",
> > context_type,
> > + GST_MESSAGE_SRC_NAME(msg));
> > +
> > +#if defined(GDK_WINDOWING_X11) && defined(HAVE_LIBVA)
> > + if (g_strcmp0(context_type, "gst.vaapi.app.Display") == 0) {
>
>
> Not critical and also can be done later but maybe worth to implement in
> a create_context function
> so later we can have something like:
>
> create_vaapi_context()
>
> create_gl_context()
>
> ...
>
>
> Snir
>
Done, I'll send a new patch
> > + 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;
Frediano
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