Add initial support for VA/DRM.

NEWS

@@ -5,6 +5,7 @@ Copyright (C) 2011 Collabora
 
 Version 0.4.0 - DD.Aug.2012
 * Add support for Wayland
+* Add support for headless pipelines (VA/DRM API)
 * Drop FFmpeg-based decoders
 
 Version 0.3.7 - 26.Jun.2012

configure.ac

@@ -43,11 +43,13 @@ m4_define([gst_plugins_bad_version],
 
 # VA-API minimum version number
 m4_define([va_api_version],     [0.30.4])
+m4_define([va_api_drm_version], [0.34.0])
 m4_define([va_api_x11_version], [0.31.0])
 m4_define([va_api_glx_version], [0.32.0])
 m4_define([va_api_wld_version], [0.34.0])
 
 # libva package version number
+m4_define([libva_drm_package_version], [1.2.0])
 m4_define([libva_x11_package_version], [1.0.3])
 m4_define([libva_glx_package_version], [1.0.9])
 m4_define([libva_wld_package_version], [1.2.0])
@@ -102,6 +104,11 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 AC_PROG_LIBTOOL
 
+AC_ARG_ENABLE(drm,
+    AS_HELP_STRING([--enable-drm],
+                   [enable DRM backend @<:@default=yes@:>@]),
+    [], [enable_drm="yes"])
+
 AC_ARG_ENABLE(x11,
     AS_HELP_STRING([--enable-x11],
                    [enable X11 output @<:@default=yes@:>@]),
@@ -276,6 +283,20 @@ dnl ---------------------------------------------------------------------------
 dnl -- Renderers                                                             --
 dnl ---------------------------------------------------------------------------
 
+dnl Check for DRM/libudev
+USE_DRM=0
+if test "$enable_drm" = "yes"; then
+    PKG_CHECK_MODULES(DRM, [libdrm], [USE_DRM=1], [USE_DRM=0])
+    PKG_CHECK_MODULES(UDEV, [libudev], [:], [USE_DRM=0])
+
+    if test $USE_DRM -eq 1; then
+        saved_CPPFLAGS="$CPPFLAGS"
+        CPPFLAGS="$CPPFLAGS $DRM_CFLAGS"
+        AC_CHECK_HEADERS([drm_fourcc.h], [:], [USE_DRM=0])
+        CPPFLAGS="$saved_CPPFLAGS"
+    fi
+fi
+
 dnl Check for X11
 USE_X11=0
 if test "$enable_x11" = "yes"; then
@@ -355,6 +376,12 @@ VA_MINOR_VERSION=`echo "$VA_VERSION" | cut -d'.' -f2`
 VA_MICRO_VERSION=`echo "$VA_VERSION" | cut -d'.' -f3`
 VA_VERSION_STR="$VA_VERSION"
 
+dnl VA/DRM API
+if test "$enable_drm" = "yes"; then
+    PKG_CHECK_MODULES([LIBVA_DRM], [libva-drm >= va_api_drm_version],
+        [:], [USE_DRM=0])
+fi
+
 dnl VA/X11 API
 HAVE_VA_X11=0
 LIBVA_X11_PKGNAME="libva-x11"
@@ -412,7 +439,7 @@ dnl ---------------------------------------------------------------------------
 dnl -- Generate files and summary                                            --
 dnl ---------------------------------------------------------------------------
 
-case ":$USE_X11:$USE_GLX:$USE_WAYLAND:" in
+case ":$USE_X11:$USE_GLX:$USE_WAYLAND:$USE_DRM:" in
 *:1:*)
     ;;
 *)
@@ -424,6 +451,10 @@ AC_DEFINE_UNQUOTED(USE_JPEG_DECODER, $USE_JPEG_DECODER,
     [Defined to 1 if JPEG decoder is used])
 AM_CONDITIONAL(USE_JPEG_DECODER, test $USE_JPEG_DECODER -eq 1)
 
+AC_DEFINE_UNQUOTED(USE_DRM, $USE_DRM,
+    [Defined to 1 if DRM is enabled])
+AM_CONDITIONAL(USE_DRM, test $USE_DRM -eq 1)
+
 AC_DEFINE_UNQUOTED(USE_X11, $USE_X11,
     [Defined to 1 if X11 is enabled])
 AM_CONDITIONAL(USE_X11, test $USE_X11 -eq 1)
@@ -451,6 +482,8 @@ debian.upstream/gstreamer-vaapi.install.in
     debian.upstream/libgstvaapi$GST_VAAPI_MAJOR_VERSION.install:\
 debian.upstream/libgstvaapi.install.in
     debian.upstream/libgstvaapi-dev.install
+    debian.upstream/libgstvaapi-drm-$GST_VAAPI_MAJOR_VERSION.install:\
+debian.upstream/libgstvaapi-drm.install.in
     debian.upstream/libgstvaapi-glx-$GST_VAAPI_MAJOR_VERSION.install:\
 debian.upstream/libgstvaapi-glx.install.in
     debian.upstream/libgstvaapi-wayland-$GST_VAAPI_MAJOR_VERSION.install:\
@@ -472,6 +505,8 @@ debian.upstream/libgstvaapi-x11.install.in
     pkgconfig/Makefile
     pkgconfig/gstreamer-vaapi-$GST_MAJORMINOR.pc:\
 pkgconfig/gstreamer-vaapi.pc.in
+    pkgconfig/gstreamer-vaapi-drm-$GST_MAJORMINOR.pc:\
+pkgconfig/gstreamer-vaapi-drm.pc.in
     pkgconfig/gstreamer-vaapi-glx-$GST_MAJORMINOR.pc:\
 pkgconfig/gstreamer-vaapi-glx.pc.in
     pkgconfig/gstreamer-vaapi-wayland-$GST_MAJORMINOR.pc:\
@@ -488,6 +523,7 @@ yesno() {
 }
 
 VIDEO_OUTPUTS=""
+AS_IF([test $USE_DRM -eq 1], [VIDEO_OUTPUTS="$VIDEO_OUTPUTS drm"])
 AS_IF([test $USE_X11 -eq 1], [VIDEO_OUTPUTS="$VIDEO_OUTPUTS x11"])
 AS_IF([test $USE_GLX -eq 1], [VIDEO_OUTPUTS="$VIDEO_OUTPUTS glx"])
 AS_IF([test $USE_WAYLAND -eq 1], [VIDEO_OUTPUTS="$VIDEO_OUTPUTS wayland"])

debian.upstream/Makefile.am

@@ -21,6 +21,8 @@ DEBIANFILES = \
 	libgstvaapi$(GST_VAAPI_MAJOR_VERSION).install		\
 	libgstvaapi-dev.install.in				\
 	libgstvaapi-dev.install					\
+	libgstvaapi-drm.install.in				\
+	libgstvaapi-drm-$(GST_VAAPI_MAJOR_VERSION).install	\
 	libgstvaapi-x11.install.in				\
 	libgstvaapi-x11-$(GST_VAAPI_MAJOR_VERSION).install	\
 	libgstvaapi-glx.install.in				\
@@ -37,6 +39,7 @@ DEBIANGENFILES = \
 	gstreamer$(GST_MAJORMINOR)-vaapi-doc.install		\
 	libgstvaapi$(GST_VAAPI_MAJOR_VERSION).install		\
 	libgstvaapi-dev.install					\
+	libgstvaapi-drm-$(GST_VAAPI_MAJOR_VERSION).install	\
 	libgstvaapi-x11-$(GST_VAAPI_MAJOR_VERSION).install	\
 	libgstvaapi-glx-$(GST_VAAPI_MAJOR_VERSION).install	\
 	libgstvaapi-wayland-$(GST_VAAPI_MAJOR_VERSION).install	\

debian.upstream/control.in

@@ -49,6 +49,15 @@ Description: GStreamer libraries from the "vaapi" set
  .
  This package contains common libraries for the "vaapi" set.
 
+Package: libgstvaapi-drm-@GST_VAAPI_MAJOR_VERSION@
+Section: libs
+Architecture: any
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Description: GStreamer libraries from the "vaapi" set
+ VA-API support libraries for GStreamer.
+ .
+ This package contains headless libraries for the "vaapi" set.
+
 Package: libgstvaapi-x11-@GST_VAAPI_MAJOR_VERSION@
 Section: libs
 Architecture: any

debian.upstream/libgstvaapi-drm.install.in

@@ -0,0 +1 @@
+debian/tmp/usr/lib/libgstvaapi-drm-@GST_MAJORMINOR@.so.*

gst-libs/gst/vaapi/Makefile.am

@@ -1,5 +1,9 @@
 lib_LTLIBRARIES = libgstvaapi-@GST_MAJORMINOR@.la
 
+if USE_DRM
+lib_LTLIBRARIES += libgstvaapi-drm-@GST_MAJORMINOR@.la
+endif
+
 if USE_X11
 lib_LTLIBRARIES += libgstvaapi-x11-@GST_MAJORMINOR@.la
 endif
@@ -115,6 +119,23 @@ libgstvaapi_source_c += gstvaapidecoder_jpeg.c
 libgstvaapi_source_h += gstvaapidecoder_jpeg.h
 endif
 
+libgstvaapi_drm_source_c =			\
+	gstvaapidisplay_drm.c			\
+	gstvaapiwindow_drm.c			\
+	gstvaapiutils.c				\
+	$(NULL)
+
+libgstvaapi_drm_source_h =			\
+	gstvaapidisplay_drm.h			\
+	gstvaapiwindow_drm.h			\
+	$(NULL)
+
+libgstvaapi_drm_source_priv_h =			\
+	gstvaapicompat.h			\
+	gstvaapidisplay_drm_priv.h		\
+	gstvaapiutils.h				\
+	$(NULL)
+
 libgstvaapi_x11_source_c =			\
 	gstvaapidisplay_x11.c			\
 	gstvaapiutils.c				\
@@ -207,6 +228,40 @@ libgstvaapi_@GST_MAJORMINOR@_la_LDFLAGS =	\
 	$(GST_ALL_LDFLAGS)			\
 	$(NULL)
 
+libgstvaapi_drm_@GST_MAJORMINOR@_la_SOURCES =	\
+	$(libgstvaapi_drm_source_c)		\
+	$(libgstvaapi_drm_source_priv_h)	\
+	$(NULL)
+
+libgstvaapi_drm_@GST_MAJORMINOR@include_HEADERS = \
+	$(libgstvaapi_drm_source_h)		\
+	$(NULL)
+
+libgstvaapi_drm_@GST_MAJORMINOR@includedir =	\
+	$(libgstvaapi_includedir)
+
+libgstvaapi_drm_@GST_MAJORMINOR@_la_CFLAGS =	\
+	-DGST_USE_UNSTABLE_API			\
+	-I$(top_srcdir)/gst-libs		\
+	$(GLIB_CFLAGS)				\
+	$(GST_BASE_CFLAGS)			\
+	$(UDEV_CFLAGS)				\
+	$(DRM_CFLAGS)				\
+	$(LIBVA_DRM_CFLAGS)			\
+	$(NULL)
+
+libgstvaapi_drm_@GST_MAJORMINOR@_la_LIBADD =	\
+	$(GLIB_LIBS)				\
+	$(UDEV_LIBS)				\
+	$(DRM_LIBS)				\
+	$(LIBVA_DRM_LIBS)			\
+	libgstvaapi-@GST_MAJORMINOR@.la		\
+	$(NULL)
+
+libgstvaapi_drm_@GST_MAJORMINOR@_la_LDFLAGS =	\
+	$(GST_ALL_LDFLAGS)			\
+	$(NULL)
+
 libgstvaapi_x11_@GST_MAJORMINOR@_la_SOURCES =	\
 	$(libgstvaapi_x11_source_c)		\
 	$(libgstvaapi_x11_source_priv_h)	\

gst-libs/gst/vaapi/gstvaapidisplay.c

@@ -101,6 +101,10 @@ gst_vaapi_display_type_get_type(void)
 #if USE_WAYLAND
         { GST_VAAPI_DISPLAY_TYPE_WAYLAND,
           "VA/Wayland display", "wayland" },
+#endif
+#if USE_DRM
+        { GST_VAAPI_DISPLAY_TYPE_DRM,
+          "VA/DRM display", "drm" },
 #endif
         { 0, NULL, NULL },
     };

gst-libs/gst/vaapi/gstvaapidisplay.h

@@ -66,12 +66,14 @@ typedef struct _GstVaapiDisplayClass            GstVaapiDisplayClass;
  * @GST_VAAPI_DISPLAY_TYPE_X11: VA/X11 display.
  * @GST_VAAPI_DISPLAY_TYPE_GLX: VA/GLX display.
  * @GST_VAAPI_DISPLAY_TYPE_WAYLAND: VA/Wayland display.
+ * @GST_VAAPI_DISPLAY_TYPE_DRM: VA/DRM display.
  */
 enum _GstVaapiDisplayType {
     GST_VAAPI_DISPLAY_TYPE_ANY = 0,
     GST_VAAPI_DISPLAY_TYPE_X11,
     GST_VAAPI_DISPLAY_TYPE_GLX,
     GST_VAAPI_DISPLAY_TYPE_WAYLAND,
+    GST_VAAPI_DISPLAY_TYPE_DRM,
 };
 
 #define GST_VAAPI_TYPE_DISPLAY_TYPE \

gst-libs/gst/vaapi/gstvaapidisplay_drm.c

@@ -0,0 +1,532 @@
+/*
+ *  gstvaapidisplay_drm.c - VA/DRM display abstraction
+ *
+ *  Copyright (C) 2012 Intel Corporation
+ *
+ *  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
+ */
+
+/**
+ * SECTION:gstvaapidisplay_drm
+ * @short_description: VA/DRM display abstraction
+ */
+
+#include "sysdeps.h"
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <libudev.h>
+#include <xf86drm.h>
+#include <va/va_drm.h>
+#include "gstvaapiutils.h"
+#include "gstvaapidisplay_priv.h"
+#include "gstvaapidisplay_drm.h"
+#include "gstvaapidisplay_drm_priv.h"
+
+#define DEBUG 1
+#include "gstvaapidebug.h"
+
+G_DEFINE_TYPE(GstVaapiDisplayDRM,
+              gst_vaapi_display_drm,
+              GST_VAAPI_TYPE_DISPLAY);
+
+enum {
+    PROP_0,
+
+    PROP_DEVICE_PATH,
+    PROP_DRM_DEVICE
+};
+
+#define NAME_PREFIX "DRM:"
+#define NAME_PREFIX_LENGTH 4
+
+static inline gboolean
+is_device_path(const gchar *device_path)
+{
+    return strncmp(device_path, NAME_PREFIX, NAME_PREFIX_LENGTH) == 0;
+}
+
+static gboolean
+compare_device_path(gconstpointer a, gconstpointer b, gpointer user_data)
+{
+    const gchar *cached_name = a;
+    const gchar *tested_name = b;
+
+    if (!cached_name || !is_device_path(cached_name))
+        return FALSE;
+    g_return_val_if_fail(tested_name && is_device_path(tested_name), FALSE);
+
+    cached_name += NAME_PREFIX_LENGTH;
+    tested_name += NAME_PREFIX_LENGTH;
+    return strcmp(cached_name, tested_name) == 0;
+}
+
+static void
+gst_vaapi_display_drm_finalize(GObject *object)
+{
+    G_OBJECT_CLASS(gst_vaapi_display_drm_parent_class)->finalize(object);
+}
+
+/* Get default device path. Actually, the first match in the DRM subsystem */
+static const gchar *
+get_default_device_path(gpointer ptr)
+{
+    GstVaapiDisplayDRM * const display = GST_VAAPI_DISPLAY_DRM(ptr);
+    GstVaapiDisplayDRMPrivate * const priv = display->priv;
+    const gchar *syspath, *devpath;
+    struct udev *udev = NULL;
+    struct udev_device *device, *parent;
+    struct udev_enumerate *e = NULL;
+    struct udev_list_entry *l;
+    int fd;
+
+    if (!priv->device_path_default) {
+        udev = udev_new();
+        if (!udev)
+            goto end;
+
+        e = udev_enumerate_new(udev);
+        if (!e)
+            goto end;
+
+        udev_enumerate_add_match_subsystem(e, "drm");
+        udev_enumerate_scan_devices(e);
+        udev_list_entry_foreach(l, udev_enumerate_get_list_entry(e)) {
+            syspath = udev_list_entry_get_name(l);
+            device  = udev_device_new_from_syspath(udev, syspath);
+            parent  = udev_device_get_parent(device);
+            if (strcmp(udev_device_get_subsystem(parent), "pci") != 0) {
+                udev_device_unref(device);
+                continue;
+            }
+
+            devpath = udev_device_get_devnode(device);
+            fd = open(devpath, O_RDWR|O_CLOEXEC);
+            if (fd < 0) {
+                udev_device_unref(device);
+                continue;
+            }
+
+            priv->device_path_default = g_strdup(devpath);
+            close(fd);
+            udev_device_unref(device);
+            break;
+        }
+
+    end:
+        if (e)
+            udev_enumerate_unref(e);
+        if (udev)
+            udev_unref(udev);
+    }
+    return priv->device_path_default;
+}
+
+/* Reconstruct a device path without our prefix */
+static const gchar *
+get_device_path(gpointer ptr)
+{
+    GstVaapiDisplayDRM * const display = GST_VAAPI_DISPLAY_DRM(ptr);
+    const gchar *device_path = display->priv->device_path;
+
+    if (!device_path)
+        return NULL;
+
+    g_return_val_if_fail(is_device_path(device_path), NULL);
+
+    device_path += NAME_PREFIX_LENGTH;
+    if (*device_path == '\0')
+        return NULL;
+    return device_path;
+}
+
+/* Mangle device path with our prefix */
+static void
+set_device_path(GstVaapiDisplayDRM *display, const gchar *device_path)
+{
+    GstVaapiDisplayDRMPrivate * const priv = display->priv;
+
+    g_free(priv->device_path);
+    priv->device_path = NULL;
+
+    if (!device_path) {
+        device_path = get_default_device_path(display);
+        if (!device_path)
+            return;
+    }
+    priv->device_path = g_strdup_printf("%s%s", NAME_PREFIX, device_path);
+}
+
+/* Set device path from file descriptor */
+static void
+set_device_path_from_fd(GstVaapiDisplayDRM *display, gint drm_device)
+{
+    GstVaapiDisplayDRMPrivate * const priv = display->priv;
+    const gchar *busid, *path, *str;
+    gsize busid_length, path_length;
+    struct udev *udev = NULL;
+    struct udev_device *device;
+    struct udev_enumerate *e = NULL;
+    struct udev_list_entry *l;
+
+    g_free(priv->device_path);
+    priv->device_path = NULL;
+
+    if (drm_device < 0)
+        return;
+
+    busid = drmGetBusid(drm_device);
+    if (!busid)
+        return;
+    if (strncmp(busid, "pci:", 4) != 0)
+        return;
+    busid += 4;
+    busid_length = strlen(busid);
+
+    udev = udev_new();
+    if (!udev)
+        goto end;
+
+    e = udev_enumerate_new(udev);
+    if (!e)
+        goto end;
+
+    udev_enumerate_add_match_subsystem(e, "drm");
+    udev_enumerate_scan_devices(e);
+    udev_list_entry_foreach(l, udev_enumerate_get_list_entry(e)) {
+        path = udev_list_entry_get_name(l);
+        str  = strstr(path, busid);
+        if (!str || str <= path || str[-1] != '/')
+            continue;
+
+        path_length = strlen(path);
+        if (str + busid_length >= path + path_length)
+            continue;
+        if (strncmp(&str[busid_length], "/drm/card", 9) != 0)
+            continue;
+
+        device = udev_device_new_from_syspath(udev, path);
+        if (!device)
+            continue;
+
+        path = udev_device_get_devnode(device);
+        priv->device_path = g_strdup_printf("%s%s", NAME_PREFIX, path);
+        udev_device_unref(device);
+        break;
+    }
+
+end:
+    if (e)
+        udev_enumerate_unref(e);
+    if (udev)
+        udev_unref(udev);
+}
+
+static void
+gst_vaapi_display_drm_set_property(
+    GObject      *object,
+    guint         prop_id,
+    const GValue *value,
+    GParamSpec   *pspec
+)
+{
+    GstVaapiDisplayDRM * const display = GST_VAAPI_DISPLAY_DRM(object);
+
+    switch (prop_id) {
+    case PROP_DEVICE_PATH:
+        set_device_path(display, g_value_get_string(value));
+        break;
+    case PROP_DRM_DEVICE:
+        display->priv->drm_device = g_value_get_int(value);
+        break;
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+        break;
+    }
+}
+
+static void
+gst_vaapi_display_drm_get_property(
+    GObject    *object,
+    guint       prop_id,
+    GValue     *value,
+    GParamSpec *pspec
+)
+{
+    GstVaapiDisplayDRM * const display = GST_VAAPI_DISPLAY_DRM(object);
+
+    switch (prop_id) {
+    case PROP_DEVICE_PATH:
+        g_value_set_string(value, get_device_path(display));
+        break;
+    case PROP_DRM_DEVICE:
+        g_value_set_int(value, display->priv->drm_device);
+        break;
+    default:
+        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
+        break;
+    }
+}
+
+static void
+gst_vaapi_display_drm_constructed(GObject *object)
+{
+    GstVaapiDisplayDRM * const display = GST_VAAPI_DISPLAY_DRM(object);
+    GstVaapiDisplayDRMPrivate * const priv = display->priv;
+    GstVaapiDisplayCache * const cache = gst_vaapi_display_get_cache();
+    const GstVaapiDisplayInfo *info;
+    GObjectClass *parent_class;
+
+    priv->create_display = priv->drm_device < 0;
+
+    /* Don't create DRM display if there is one in the cache already */
+    if (priv->create_display) {
+        info = gst_vaapi_display_cache_lookup_by_name(
+            cache,
+            priv->device_path,
+            compare_device_path, NULL
+        );
+        if (info) {
+            priv->drm_device     = GPOINTER_TO_INT(info->native_display);
+            priv->create_display = FALSE;
+        }
+    }
+
+    /* Reset device-path if the user provided his own DRM display */
+    if (!priv->create_display)
+        set_device_path_from_fd(display, priv->drm_device);
+
+    parent_class = G_OBJECT_CLASS(gst_vaapi_display_drm_parent_class);
+    if (parent_class->constructed)
+        parent_class->constructed(object);
+}
+
+static gboolean
+gst_vaapi_display_drm_open_display(GstVaapiDisplay *display)
+{
+    GstVaapiDisplayDRMPrivate * const priv =
+        GST_VAAPI_DISPLAY_DRM(display)->priv;
+
+    if (priv->create_display) {
+        const gchar *device_path = get_device_path(display);
+        if (!device_path)
+            return FALSE;
+        priv->drm_device = open(device_path, O_RDWR|O_CLOEXEC);
+        if (priv->drm_device < 0)
+            return FALSE;
+    }
+    if (priv->drm_device < 0)
+        return FALSE;
+    return TRUE;
+}
+
+static void
+gst_vaapi_display_drm_close_display(GstVaapiDisplay *display)
+{
+    GstVaapiDisplayDRMPrivate * const priv =
+        GST_VAAPI_DISPLAY_DRM(display)->priv;
+
+    if (priv->drm_device >= 0) {
+        if (priv->create_display)
+            close(priv->drm_device);
+        priv->drm_device = -1;
+    }
+
+    if (priv->device_path) {
+        g_free(priv->device_path);
+        priv->device_path = NULL;
+    }
+
+    if (priv->device_path_default) {
+        g_free(priv->device_path_default);
+        priv->device_path_default = NULL;
+    }
+}
+
+static gboolean
+gst_vaapi_display_drm_get_display_info(
+    GstVaapiDisplay     *display,
+    GstVaapiDisplayInfo *info
+)
+{
+    GstVaapiDisplayDRMPrivate * const priv =
+        GST_VAAPI_DISPLAY_DRM(display)->priv;
+    GstVaapiDisplayCache *cache;
+    const GstVaapiDisplayInfo *cached_info;
+
+    /* Return any cached info even if child has its own VA display */
+    cache = gst_vaapi_display_get_cache();
+    if (!cache)
+        return FALSE;
+    cached_info = gst_vaapi_display_cache_lookup_by_native_display(
+        cache, GINT_TO_POINTER(priv->drm_device));
+    if (cached_info) {
+        *info = *cached_info;
+        return TRUE;
+    }
+
+    /* Otherwise, create VA display if there is none already */
+    info->native_display = GINT_TO_POINTER(priv->drm_device);
+    info->display_name   = priv->device_path;
+    if (!info->va_display) {
+        info->va_display = vaGetDisplayDRM(priv->drm_device);
+        if (!info->va_display)
+            return FALSE;
+        info->display_type = GST_VAAPI_DISPLAY_TYPE_DRM;
+    }
+    return TRUE;
+}
+
+static void
+gst_vaapi_display_drm_class_init(GstVaapiDisplayDRMClass *klass)
+{
+    GObjectClass * const object_class = G_OBJECT_CLASS(klass);
+    GstVaapiDisplayClass * const dpy_class = GST_VAAPI_DISPLAY_CLASS(klass);
+
+    g_type_class_add_private(klass, sizeof(GstVaapiDisplayDRMPrivate));
+
+    object_class->finalize      = gst_vaapi_display_drm_finalize;
+    object_class->set_property  = gst_vaapi_display_drm_set_property;
+    object_class->get_property  = gst_vaapi_display_drm_get_property;
+    object_class->constructed   = gst_vaapi_display_drm_constructed;
+
+    dpy_class->open_display     = gst_vaapi_display_drm_open_display;
+    dpy_class->close_display    = gst_vaapi_display_drm_close_display;
+    dpy_class->get_display      = gst_vaapi_display_drm_get_display_info;
+
+    /**
+     * GstVaapiDisplayDRM:drm-device:
+     *
+     * The DRM device (file descriptor).
+     */
+    g_object_class_install_property
+        (object_class,
+         PROP_DRM_DEVICE,
+         g_param_spec_int("drm-device",
+                          "DRM device",
+                          "DRM device",
+                          -1, G_MAXINT32, -1,
+                          G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
+
+    /**
+     * GstVaapiDisplayDRM:device-path:
+     *
+     * The DRM device path.
+     */
+    g_object_class_install_property
+        (object_class,
+         PROP_DEVICE_PATH,
+         g_param_spec_string("device-path",
+                             "DRM device path",
+                             "DRM device path",
+                             NULL,
+                             G_PARAM_READWRITE|G_PARAM_CONSTRUCT_ONLY));
+}
+
+static void
+gst_vaapi_display_drm_init(GstVaapiDisplayDRM *display)
+{
+    GstVaapiDisplayDRMPrivate * const priv =
+        GST_VAAPI_DISPLAY_DRM_GET_PRIVATE(display);
+
+    display->priv               = priv;
+    priv->device_path_default   = NULL;
+    priv->device_path           = NULL;
+    priv->drm_device            = -1;
+    priv->create_display        = TRUE;
+}
+
+/**
+ * gst_vaapi_display_drm_new:
+ * @device_path: the DRM device path
+ *
+ * Opens an DRM file descriptor using @device_path and returns a newly
+ * allocated #GstVaapiDisplay object. The DRM display will be cloed
+ * when the reference count of the object reaches zero.
+ *
+ * If @device_path is NULL, the DRM device path will be automatically
+ * determined as the first positive match in the list of available DRM
+ * devices.
+ *
+ * Return value: a newly allocated #GstVaapiDisplay object
+ */
+GstVaapiDisplay *
+gst_vaapi_display_drm_new(const gchar *device_path)
+{
+    return g_object_new(GST_VAAPI_TYPE_DISPLAY_DRM,
+                        "device-path", device_path,
+                        NULL);
+}
+
+/**
+ * gst_vaapi_display_drm_new_with_device:
+ * @device: an open DRM device (file descriptor)
+ *
+ * Creates a #GstVaapiDisplay based on the open DRM @device. The
+ * caller still owns the device file descriptor and must call close()
+ * when all #GstVaapiDisplay references are released. Doing so too
+ * early can yield undefined behaviour.
+ *
+ * Return value: a newly allocated #GstVaapiDisplay object
+ */
+GstVaapiDisplay *
+gst_vaapi_display_drm_new_with_device(gint device)
+{
+    g_return_val_if_fail(device >= 0, NULL);
+
+    return g_object_new(GST_VAAPI_TYPE_DISPLAY_DRM,
+                        "drm-device", device,
+                        NULL);
+}
+
+/**
+ * gst_vaapi_display_drm_get_device:
+ * @display: a #GstVaapiDisplayDRM
+ *
+ * Returns the underlying DRM device file descriptor that was created
+ * by gst_vaapi_display_drm_new() or that was bound from
+ * gst_vaapi_display_drm_new_with_device().
+ *
+ * Return value: the DRM file descriptor attached to @display
+ */
+gint
+gst_vaapi_display_drm_get_device(GstVaapiDisplayDRM *display)
+{
+    g_return_val_if_fail(GST_VAAPI_IS_DISPLAY_DRM(display), -1);
+
+    return display->priv->drm_device;
+}
+
+/**
+ * gst_vaapi_display_drm_get_device_path:
+ * @display: a #GstVaapiDisplayDRM
+ *
+ * Returns the underlying DRM device path name was created by
+ * gst_vaapi_display_drm_new() or that was bound from
+ * gst_vaapi_display_drm_new_with_device().
+ *
+ * Note: the #GstVaapiDisplayDRM object owns the resulting string, so
+ * it shall not be deallocated.
+ *
+ * Return value: the DRM device path name attached to @display
+ */
+const gchar *
+gst_vaapi_display_drm_get_device_path(GstVaapiDisplayDRM *display)
+{
+    g_return_val_if_fail(GST_VAAPI_IS_DISPLAY_DRM(display), NULL);
+
+    return display->priv->device_path;
+}

gst-libs/gst/vaapi/gstvaapidisplay_drm.h

@@ -0,0 +1,97 @@
+/*
+ *  gstvaapidisplay_drm.h - VA/DRM display abstraction
+ *
+ *  Copyright (C) 2012 Intel Corporation
+ *
+ *  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_DRM_H
+#define GST_VAAPI_DISPLAY_DRM_H
+
+#include <gst/vaapi/gstvaapidisplay.h>
+
+G_BEGIN_DECLS
+
+#define GST_VAAPI_TYPE_DISPLAY_DRM \
+    (gst_vaapi_display_drm_get_type())
+
+#define GST_VAAPI_DISPLAY_DRM(obj)                              \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj),                          \
+                                GST_VAAPI_TYPE_DISPLAY_DRM,     \
+                                GstVaapiDisplayDRM))
+
+#define GST_VAAPI_DISPLAY_DRM_CLASS(klass)                      \
+    (G_TYPE_CHECK_CLASS_CAST((klass),                           \
+                             GST_VAAPI_TYPE_DISPLAY_DRM,        \
+                             GstVaapiDisplayDRMClass))
+
+#define GST_VAAPI_IS_DISPLAY_DRM(obj) \
+    (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_VAAPI_TYPE_DISPLAY_DRM))
+
+#define GST_VAAPI_IS_DISPLAY_DRM_CLASS(klass) \
+    (G_TYPE_CHECK_CLASS_TYPE((klass), GST_VAAPI_TYPE_DISPLAY_DRM))
+
+#define GST_VAAPI_DISPLAY_DRM_GET_CLASS(obj)                    \
+    (G_TYPE_INSTANCE_GET_CLASS((obj),                           \
+                               GST_VAAPI_TYPE_DISPLAY_DRM,      \
+                               GstVaapiDisplayDRMClass))
+
+typedef struct _GstVaapiDisplayDRM              GstVaapiDisplayDRM;
+typedef struct _GstVaapiDisplayDRMPrivate       GstVaapiDisplayDRMPrivate;
+typedef struct _GstVaapiDisplayDRMClass         GstVaapiDisplayDRMClass;
+
+/**
+ * GstVaapiDisplayDRM:
+ *
+ * VA/DRM display wrapper.
+ */
+struct _GstVaapiDisplayDRM {
+    /*< private >*/
+    GstVaapiDisplay parent_instance;
+
+    GstVaapiDisplayDRMPrivate *priv;
+};
+
+
+/**
+ * GstVaapiDisplayDRMClass:
+ *
+ * VA/DRM display wrapper clas.
+ */
+struct _GstVaapiDisplayDRMClass {
+    /*< private >*/
+    GstVaapiDisplayClass parent_class;
+};
+
+GType
+gst_vaapi_display_drm_get_type(void) G_GNUC_CONST;
+
+GstVaapiDisplay *
+gst_vaapi_display_drm_new(const gchar *device_path);
+
+GstVaapiDisplay *
+gst_vaapi_display_drm_new_with_device(gint device);
+
+gint
+gst_vaapi_display_drm_get_device(GstVaapiDisplayDRM *display);
+
+const gchar *
+gst_vaapi_display_drm_get_device_path(GstVaapiDisplayDRM *display);
+
+G_END_DECLS
+
+#endif /* GST_VAAPI_DISPLAY_DRM_H */

gst-libs/gst/vaapi/gstvaapidisplay_drm_priv.h

@@ -0,0 +1,55 @@
+/*
+ *  gstvaapidisplay_drm_priv.h - Internal VA/DRM interface
+ *
+ *  Copyright (C) 2012 Intel Corporation
+ *
+ *  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_DRM_PRIV_H
+#define GST_VAAPI_DISPLAY_DRM_PRIV_H
+
+#include <gst/vaapi/gstvaapidisplay_drm.h>
+
+G_BEGIN_DECLS
+
+#define GST_VAAPI_DISPLAY_DRM_GET_PRIVATE(obj)                  \
+    (G_TYPE_INSTANCE_GET_PRIVATE((obj),                         \
+                                 GST_VAAPI_TYPE_DISPLAY_DRM,	\
+                                 GstVaapiDisplayDRMPrivate))
+
+#define GST_VAAPI_DISPLAY_DRM_CAST(display) ((GstVaapiDisplayDRM *)(display))
+
+/**
+ * GST_VAAPI_DISPLAY_DRM_DEVICE:
+ * @display: a #GstVaapiDisplay
+ *
+ * Macro that evaluates to the underlying DRM file descriptor of @display
+ */
+#undef  GST_VAAPI_DISPLAY_DRM_DEVICE
+#define GST_VAAPI_DISPLAY_DRM_DEVICE(display) \
+    GST_VAAPI_DISPLAY_DRM_CAST(display)->priv->drm_device
+
+struct _GstVaapiDisplayDRMPrivate {
+    gchar      *device_path_default;
+    gchar      *device_path;
+    gint        drm_device;
+    guint       create_display  : 1;
+};
+
+G_END_DECLS
+
+#endif /* GST_VAAPI_DISPLAY_DRM_PRIV_H */

gst-libs/gst/vaapi/gstvaapiwindow_drm.c

@@ -0,0 +1,161 @@
+/*
+ *  gstvaapiwindow_drm.c - VA/DRM window abstraction
+ *
+ *  Copyright (C) 2012 Intel Corporation
+ *
+ *  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
+ */
+
+/**
+ * SECTION:gstvaapiwindow_drm
+ * @short_description: VA/DRM dummy window abstraction
+ */
+
+#include "sysdeps.h"
+#include "gstvaapiwindow_drm.h"
+
+#define DEBUG 1
+#include "gstvaapidebug.h"
+
+G_DEFINE_TYPE(GstVaapiWindowDRM,
+              gst_vaapi_window_drm,
+              GST_VAAPI_TYPE_WINDOW);
+
+static gboolean
+gst_vaapi_window_drm_show(GstVaapiWindow *window)
+{
+    return TRUE;
+}
+
+static gboolean
+gst_vaapi_window_drm_hide(GstVaapiWindow *window)
+{
+    return TRUE;
+}
+
+static gboolean
+gst_vaapi_window_drm_create(
+    GstVaapiWindow *window,
+    guint          *width,
+    guint          *height
+)
+{
+    return TRUE;
+}
+
+static void
+gst_vaapi_window_drm_destroy(GstVaapiWindow * window)
+{
+}
+
+static gboolean
+gst_vaapi_window_drm_resize(
+    GstVaapiWindow * window,
+    guint            width,
+    guint            height
+)
+{
+    return TRUE;
+}
+
+static gboolean
+gst_vaapi_window_drm_render(
+    GstVaapiWindow          *window,
+    GstVaapiSurface         *surface,
+    const GstVaapiRectangle *src_rect,
+    const GstVaapiRectangle *dst_rect,
+    guint                    flags
+)
+{
+    return TRUE;
+}
+
+static void
+gst_vaapi_window_drm_finalize(GObject *object)
+{
+    G_OBJECT_CLASS(gst_vaapi_window_drm_parent_class)->finalize(object);
+}
+
+static void
+gst_vaapi_window_drm_constructed(GObject *object)
+{
+    GObjectClass *parent_class;
+
+    parent_class = G_OBJECT_CLASS(gst_vaapi_window_drm_parent_class);
+    if (parent_class->constructed)
+        parent_class->constructed(object);
+}
+
+static void
+gst_vaapi_window_drm_class_init(GstVaapiWindowDRMClass * klass)
+{
+    GObjectClass * const object_class = G_OBJECT_CLASS(klass);
+    GstVaapiWindowClass * const window_class = GST_VAAPI_WINDOW_CLASS(klass);
+
+    object_class->finalize      = gst_vaapi_window_drm_finalize;
+    object_class->constructed   = gst_vaapi_window_drm_constructed;
+
+    window_class->create        = gst_vaapi_window_drm_create;
+    window_class->destroy       = gst_vaapi_window_drm_destroy;
+    window_class->show          = gst_vaapi_window_drm_show;
+    window_class->hide          = gst_vaapi_window_drm_hide;
+    window_class->render        = gst_vaapi_window_drm_render;
+    window_class->resize        = gst_vaapi_window_drm_resize;
+}
+
+static void
+gst_vaapi_window_drm_init(GstVaapiWindowDRM * window)
+{
+}
+
+/**
+ * gst_vaapi_window_drm_new:
+ * @display: a #GstVaapiDisplay
+ * @width: the requested window width, in pixels (unused)
+ * @height: the requested windo height, in pixels (unused)
+ *
+ * Creates a dummy window. The window will be attached to the @display.
+ * All rendering functions will return success since VA/DRM is a
+ * renderless API.
+ *
+ * Note: this dummy window object is only necessary to fulfill cases
+ * where the client application wants to automatically determine the
+ * best display to use for the current system. As such, it provides
+ * utility functions with the same API (function arguments) to help
+ * implement uniform function tables.
+ *
+ * Return value: the newly allocated #GstVaapiWindow object
+ */
+GstVaapiWindow *
+gst_vaapi_window_drm_new(
+    GstVaapiDisplay *display,
+    guint            width,
+    guint            height
+)
+{
+    GST_DEBUG("new window, size %ux%u", width, height);
+
+    g_return_val_if_fail(GST_VAAPI_IS_DISPLAY(display), NULL);
+    g_return_val_if_fail(width  > 0, NULL);
+    g_return_val_if_fail(height > 0, NULL);
+
+    return g_object_new(GST_VAAPI_TYPE_WINDOW_DRM,
+                        "display", display,
+                        "id",      GST_VAAPI_ID(0),
+                        "width",   width,
+                        "height",  height,
+                        NULL);
+}

gst-libs/gst/vaapi/gstvaapiwindow_drm.h

@@ -0,0 +1,85 @@
+/*
+ *  gstvaapiwindow_drm.h - VA/DRM window abstraction
+ *
+ *  Copyright (C) 2012 Intel Corporation
+ *
+ *  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_WINDOW_DRM_H
+#define GST_VAAPI_WINDOW_DRM_H
+
+#include <gst/vaapi/gstvaapidisplay.h>
+#include <gst/vaapi/gstvaapiwindow.h>
+
+G_BEGIN_DECLS
+
+#define GST_VAAPI_TYPE_WINDOW_DRM \
+    (gst_vaapi_window_drm_get_type())
+
+#define GST_VAAPI_WINDOW_DRM(obj)                               \
+    (G_TYPE_CHECK_INSTANCE_CAST((obj),                          \
+                                GST_VAAPI_TYPE_WINDOW_DRM,      \
+                                GstVaapiWindowDRM))
+
+#define GST_VAAPI_WINDOW_DRM_CLASS(klass)                       \
+    (G_TYPE_CHECK_CLASS_CAST((klass),                           \
+                             GST_VAAPI_TYPE_WINDOW_DRM,         \
+                             GstVaapiWindowDRMClass))
+
+#define GST_VAAPI_IS_WINDOW_DRM(obj) \
+    (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_VAAPI_TYPE_WINDOW_DRM))
+
+#define GST_VAAPI_IS_WINDOW_DRM_CLASS(klass) \
+    (G_TYPE_CHECK_CLASS_TYPE((klass), GST_VAAPI_TYPE_WINDOW_DRM))
+
+#define GST_VAAPI_WINDOW_DRM_GET_CLASS(obj)                     \
+    (G_TYPE_INSTANCE_GET_CLASS((obj),                           \
+                               GST_VAAPI_TYPE_WINDOW_DRM,       \
+                               GstVaapiWindowDRMClass))
+
+typedef struct _GstVaapiWindowDRM               GstVaapiWindowDRM;
+typedef struct _GstVaapiWindowDRMClass          GstVaapiWindowDRMClass;
+
+/**
+ * GstVaapiWindowDRM:
+ *
+ * A dummy DRM window abstraction.
+ */
+struct _GstVaapiWindowDRM {
+    /*< private >*/
+    GstVaapiWindow parent_instance;
+};
+
+/**
+ * GstVaapiWindowDRMClass:
+ *
+ * A DRM window class.
+ */
+struct _GstVaapiWindowDRMClass {
+    /*< private >*/
+    GstVaapiWindowClass parent_class;
+};
+
+GType
+gst_vaapi_window_drm_get_type(void) G_GNUC_CONST;
+
+GstVaapiWindow *
+gst_vaapi_window_drm_new(GstVaapiDisplay *display, guint width, guint height);
+
+G_END_DECLS
+
+#endif /* GST_VAAPI_WINDOW_DRM_H */

pkgconfig/Makefile.am

@@ -1,4 +1,7 @@
 pcfiles_in  = gstreamer-vaapi.pc.in
+if USE_DRM
+pcfiles_in += gstreamer-vaapi-drm.pc.in
+endif
 if USE_X11
 pcfiles_in += gstreamer-vaapi-x11.pc.in
 endif
@@ -12,6 +15,7 @@ endif
 pcfiles = $(pcfiles_in:%.pc.in=%-@GST_MAJORMINOR@.pc)
 
 all_pcfiles_in  = gstreamer-vaapi.pc.in
+all_pcfiles_in += gstreamer-vaapi-drm.pc.in
 all_pcfiles_in += gstreamer-vaapi-x11.pc.in
 all_pcfiles_in += gstreamer-vaapi-glx.pc.in
 all_pcfiles_in += gstreamer-vaapi-wayland.pc.in

pkgconfig/gstreamer-vaapi-drm.pc.in

@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@/gstreamer-@GST_MAJORMINOR@
+pluginsdir=@libdir@/gstreamer-@GST_MAJORMINOR@
+
+Name: GStreamer VA-API (DRM) Plugins Libraries
+Description: Streaming media framework, VA-API (DRM) plugins libraries
+Requires: gstreamer-vaapi-@GST_MAJORMINOR@ libva-drm
+Version: @VERSION@
+Libs: -L${libdir} -lgstvaapi-drm-@GST_MAJORMINOR@
+Cflags: -I${includedir}