libs: vaapitexturemap: implement GstVaapiTextureMap

Implement GstVaapiTextureMap object, which caches VAAPI textures, so them can be
reused. Internally it is a hash table.

Note that it is GstObject based rather than GstVaapiObject, as part of the future
converstion to GstObject of most of the code.

https://bugzilla.gnome.org/show_bug.cgi?id=769293

Signed-off-by: Víctor Manuel Jáquez Leal <victorx.jaquez@intel.com>

3 files changed, 223 insertions, 0 deletions

diff --git a/gst-libs/gst/vaapi/Makefile.am b/gst-libs/gst/vaapi/Makefile.am
index fc97c944..43a7772a 100644
--- a/gst-libs/gst/vaapi/Makefile.am
+++ b/gst-libs/gst/vaapi/Makefile.am
@@ -73,6 +73,7 @@ libgstvaapi_source_c =				\
 	gstvaapisurfacepool.c			\
 	gstvaapisurfaceproxy.c			\
 	gstvaapitexture.c			\
+	gstvaapitexturemap.c			\
 	gstvaapiutils.c				\
 	gstvaapiutils_core.c			\
 	gstvaapiutils_h264.c			\
@@ -105,6 +106,7 @@ libgstvaapi_source_h =				\
 	gstvaapisurfacepool.h			\
 	gstvaapisurfaceproxy.h			\
 	gstvaapitexture.h			\
+	gstvaapitexturemap.h			\
 	gstvaapitypes.h				\
 	gstvaapiutils_h264.h			\
 	gstvaapiutils_h265.h			\
diff --git a/gst-libs/gst/vaapi/gstvaapitexturemap.c b/gst-libs/gst/vaapi/gstvaapitexturemap.c
new file mode 100644
index 00000000..cb832dad
--- /dev/null
+++ b/gst-libs/gst/vaapi/gstvaapitexturemap.c
@@ -0,0 +1,163 @@
+/*
+ *  gstvaapitexture.c - VA texture Hash map
+ *
+ *  Copyright (C) 2016 Intel Corporation
+ *  Copyright (C) 2016 Igalia S.L.
+ *
+ *  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:gstvaapitexturemap
+ * @short_description: VA/GLX/EGL texture hash map abstraction
+ */
+
+#include "gstvaapitexturemap.h"
+
+#define DEBUG 1
+#include "gstvaapidebug.h"
+
+/**
+ * GstVaapiTextureMap:
+ *
+ * Base class for API-dependent texture map.
+ */
+struct _GstVaapiTextureMap {
+  GstObject parent_instance;
+
+  /*< private >*/
+  GHashTable *texture_map;
+};
+
+/**
+ * GstVaapiTextureMapClass:
+ *
+ * Base class for API-dependent texture map.
+ */
+struct _GstVaapiTextureMapClass {
+  GstObjectClass parent_class;
+};
+
+#define MAX_NUM_TEXTURE 10
+
+G_DEFINE_TYPE (GstVaapiTextureMap, gst_vaapi_texture_map, GST_TYPE_OBJECT);
+
+static void
+gst_vaapi_texture_map_init (GstVaapiTextureMap * map)
+{
+  map->texture_map =
+      g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL,
+      (GDestroyNotify) gst_vaapi_texture_unref);
+}
+
+static void
+gst_vaapi_texture_map_finalize (GObject * object)
+{
+  GstVaapiTextureMap *map = GST_VAAPI_TEXTURE_MAP (object);
+
+  if (map->texture_map) {
+    g_hash_table_remove_all (map->texture_map);
+    g_hash_table_destroy (map->texture_map);
+  }
+
+  G_OBJECT_CLASS (gst_vaapi_texture_map_parent_class)->finalize (object);
+}
+
+static void
+gst_vaapi_texture_map_class_init (GstVaapiTextureMapClass * klass)
+{
+  GObjectClass *const object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = gst_vaapi_texture_map_finalize;
+}
+
+/**
+ * gst_vaapi_texture_map_new:
+ *
+ * Creates a texture hash map.
+ *
+ * Return value: the newly created #GstVaapiTextureMap object
+ */
+GstVaapiTextureMap *
+gst_vaapi_texture_map_new (void)
+{
+  GstVaapiTextureMap *map;
+
+  map = g_object_new (GST_TYPE_VAAPI_TEXTURE_MAP, NULL);
+  return map;
+}
+
+/**
+ * gst_vaapi_texture_map_add:
+ * @map: a #GstVaapiTextureMap instance
+ * @texture: a #GstVaapiTexture instance to add
+ * @id: the id of the GLTexture
+ *
+ * Adds @texture into the @map table.
+ *
+ * Returns: %TRUE if @texture was inserted correctly.
+ **/
+gboolean
+gst_vaapi_texture_map_add (GstVaapiTextureMap * map, GstVaapiTexture * texture,
+    guint id)
+{
+  g_return_val_if_fail (map != NULL, FALSE);
+  g_return_val_if_fail (map->texture_map != NULL, FALSE);
+  g_return_val_if_fail (texture != NULL, FALSE);
+
+  if (g_hash_table_size (map->texture_map) > MAX_NUM_TEXTURE) {
+    GST_WARNING ("Texture map is full");
+    return FALSE;
+  }
+
+  g_hash_table_insert (map->texture_map, GUINT_TO_POINTER (id), texture);
+
+  return TRUE;
+}
+
+/**
+ * gst_vaapi_texture_map_lookup:
+ * @map: a #GstVaapiTextureMap instance
+ * @id: the id of the GLTexture
+ *
+ * Search for the #GstVaapiTexture associated with the GLTexture @id
+ * in the @map.
+ *
+ * Returns: a pointer to #GstVaapiTexture if found; otherwise %NULL.
+ **/
+GstVaapiTexture *
+gst_vaapi_texture_map_lookup (GstVaapiTextureMap * map, guint id)
+{
+  g_return_val_if_fail (map != NULL, NULL);
+  g_return_val_if_fail (map->texture_map != NULL, NULL);
+
+  return g_hash_table_lookup (map->texture_map, GUINT_TO_POINTER (id));
+}
+
+/**
+ * gst_vaapi_texture_map_reset:
+ * @map: a #GstVaapiTextureMap instance
+ *
+ * Removes all the #GstVaapiTexture in the @map.
+ **/
+void
+gst_vaapi_texture_map_reset (GstVaapiTextureMap * map)
+{
+  g_return_if_fail (map != NULL);
+  g_return_if_fail (map->texture_map != NULL);
+
+  g_hash_table_remove_all (map->texture_map);
+}
diff --git a/gst-libs/gst/vaapi/gstvaapitexturemap.h b/gst-libs/gst/vaapi/gstvaapitexturemap.h
new file mode 100644
index 00000000..e74fedf8
--- /dev/null
+++ b/gst-libs/gst/vaapi/gstvaapitexturemap.h
@@ -0,0 +1,58 @@
+/*
+ *  gstvaapitexturemap.h - VA texture Hash map
+ *
+ *  Copyright (C) 2016 Intel Corporation
+ *  Copyright (C) 2016 Igalia S.L.
+ *
+ *  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_TEXTURE_MAP_H
+#define GST_VAAPI_TEXTURE_MAP_H
+
+#include <gst/vaapi/gstvaapitexture.h>
+
+G_BEGIN_DECLS
+
+typedef struct _GstVaapiTextureMap GstVaapiTextureMap;
+typedef struct _GstVaapiTextureMapClass GstVaapiTextureMapClass;
+
+#define GST_TYPE_VAAPI_TEXTURE_MAP \
+  (gst_vaapi_texture_map_get_type ())
+#define GST_VAAPI_TEXTURE_MAP(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_VAAPI_TEXTURE_MAP, GstVaapiTextureMap))
+
+GstVaapiTextureMap *
+gst_vaapi_texture_map_new (void);
+
+gboolean
+gst_vaapi_texture_map_add (GstVaapiTextureMap * map,
+                           GstVaapiTexture * texture,
+                           guint id);
+
+GstVaapiTexture *
+gst_vaapi_texture_map_lookup (GstVaapiTextureMap * map,
+                              guint id);
+
+void
+gst_vaapi_texture_map_reset (GstVaapiTextureMap * map);
+
+GType
+gst_vaapi_texture_map_get_type (void) G_GNUC_CONST;
+
+G_END_DECLS
+
+#endif /* GST_VAAPI_TEXTURE_MAP_H */