Add initial support for EGL.

Add initial support for EGL to libgstvaapi core library. The target
display server and the desired OpenGL API can be programmatically
selected at run-time.

A comprehensive set of EGL utilities are provided to support those
dynamic selection needs, but also most importantly to ensure that
the GL command stream is executed from within a single thread.

https://bugzilla.gnome.org/show_bug.cgi?id=743846

1 files changed, 101 insertions, 0 deletions

diff --git a/gst-libs/gst/vaapi/gstvaapidisplay_egl_priv.h b/gst-libs/gst/vaapi/gstvaapidisplay_egl_priv.h
new file mode 100644
index 00000000..3db5ad89
--- /dev/null
+++ b/gst-libs/gst/vaapi/gstvaapidisplay_egl_priv.h
@@ -0,0 +1,101 @@
+/*
+ *  gstvaapidisplay_egl_priv.h - Internal VA/EGL interface
+ *
+ *  Copyright (C) 2014 Splitted-Desktop Systems
+ *    Author: Gwenole Beauchesne <gwenole.beauchesne@intel.com>
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public License
+ *  as published by the Free Software Foundation; either version 2.1
+ *  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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free
+ *  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ *  Boston, MA 02110-1301 USA
+ */
+
+#ifndef GST_VAAPI_DISPLAY_EGL_PRIV_H
+#define GST_VAAPI_DISPLAY_EGL_PRIV_H
+
+#include <gst/vaapi/gstvaapiwindow.h>
+#include "gstvaapidisplay_egl.h"
+#include "gstvaapidisplay_priv.h"
+#include "gstvaapiutils_egl.h"
+
+G_BEGIN_DECLS
+
+#define GST_VAAPI_IS_DISPLAY_EGL(display) \
+  ((display) != NULL && \
+   GST_VAAPI_DISPLAY_GET_CLASS_TYPE (display) == GST_VAAPI_DISPLAY_TYPE_EGL)
+
+#define GST_VAAPI_DISPLAY_EGL_CLASS(klass) \
+  ((GstVaapiDisplayEGLClass *)(klass))
+
+#define GST_VAAPI_DISPLAY_EGL_GET_CLASS(obj) \
+  GST_VAAPI_DISPLAY_EGL_CLASS (GST_VAAPI_DISPLAY_GET_CLASS (obj))
+
+/**
+ * GST_VAAPI_DISPLAY_EGL_DISPLAY:
+ * @display: a #GstVaapiDisplay
+ *
+ * Macro that evaluates to #EglDisplay wrapper for @display.
+ * This is an internal macro that does not do any run-time type check.
+ */
+#undef  GST_VAAPI_DISPLAY_EGL_DISPLAY
+#define GST_VAAPI_DISPLAY_EGL_DISPLAY(display) \
+  (GST_VAAPI_DISPLAY_EGL (display)->egl_display)
+
+/**
+ * GST_VAAPI_DISPLAY_EGL_CONTEXT:
+ * @display: a #GstVaapiDisplay
+ *
+ * Macro that evaluates to #EglContext wrapper for @display.
+ * This is an internal macro that does not do any run-time type check.
+ */
+#undef  GST_VAAPI_DISPLAY_EGL_CONTEXT
+#define GST_VAAPI_DISPLAY_EGL_CONTEXT(display) \
+  gst_vaapi_display_egl_get_context (GST_VAAPI_DISPLAY_EGL (display))
+
+typedef struct _GstVaapiDisplayEGLClass GstVaapiDisplayEGLClass;
+
+/**
+ * GstVaapiDisplayEGL:
+ *
+ * VA/EGL display wrapper.
+ */
+struct _GstVaapiDisplayEGL
+{
+  /*< private >*/
+  GstVaapiDisplay parent_instance;
+
+  gpointer loader;
+  GstVaapiDisplay *display;
+  EglDisplay *egl_display;
+  EglContext *egl_context;
+  guint gles_version;
+};
+
+/**
+ * GstVaapiDisplayEGLClass:
+ *
+ * VA/EGL display wrapper clas.
+ */
+struct _GstVaapiDisplayEGLClass
+{
+  /*< private >*/
+  GstVaapiDisplayClass parent_class;
+};
+
+G_GNUC_INTERNAL
+EglContext *
+gst_vaapi_display_egl_get_context (GstVaapiDisplayEGL * display);
+
+G_END_DECLS
+
+#endif /* GST_VAAPI_DISPLAY_EGL_PRIV_H */