[516/906] add skeleton GstGLMeta

the GstVideoMeta _map/unmap functions still need implementing

gst-libs/gst/gl/Makefile.am

@@ -11,6 +11,7 @@ EXTRA_DIST = \
 libgstgl_@GST_API_VERSION@_la_SOURCES = \
 	gstgldisplay.c \
 	gstglmemory.c \
+	gstglmeta.c \
 	gstglfilter.c \
 	gstglmixer.c \
         gstglshader.c \
@@ -34,6 +35,7 @@ libgstgl_@GST_API_VERSION@include_HEADERS = \
 	gstglwindow.h \
 	gstgldisplay.h \
 	gstglmemory.h \
+	gstglmeta.h \
 	gstgles2.h \
 	gstglfilter.h \
 	gstglmixer.h \

gst-libs/gst/gl/gstglmeta.c

@@ -0,0 +1,136 @@
+/*
+ * GStreamer
+ * Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/video/video.h>
+#include <gst/video/gstvideometa.h>
+
+#include "gstglmeta.h"
+
+/* GstVideoMeta map/unmap */
+gboolean
+gst_gl_meta_map (GstVideoMeta * meta, guint plane, GstMapInfo * info,
+    gpointer * data, gint * stride, GstMapFlags flags)
+{
+  return FALSE;
+}
+
+gboolean
+gst_gl_meta_unmap (GstVideoMeta * meta, guint plane, GstMapInfo * info)
+{
+  return FALSE;
+}
+
+static void
+gst_gl_meta_init (GstGLMeta * gl_meta, gpointer params, GstBuffer * buffer)
+{
+  gl_meta->buffer = buffer;
+}
+
+void
+gst_gl_meta_free (GstGLMeta * gl_meta, GstBuffer * buffer)
+{
+  if (gl_meta->display) {
+    g_object_unref (gl_meta->display);
+    gl_meta->display = NULL;
+  }
+}
+
+static gboolean
+gst_gl_meta_transform (GstBuffer * dest, GstMeta * meta,
+    GstBuffer * buffer, GQuark type, gpointer data)
+{
+  GstGLMeta *dmeta, *smeta;
+
+  smeta = (GstGLMeta *) meta;
+
+  if (GST_META_TRANSFORM_IS_COPY (type)) {
+    GstMetaTransformCopy *copy = data;
+
+    if (!copy->region) {
+      /* only copy if the complete data is copied as well */
+      dmeta =
+          (GstGLMeta *) gst_buffer_add_meta (dest, GST_GL_META_INFO,
+          smeta->display);
+      dmeta->buffer = dest;
+
+      dmeta->memory =
+          (GstGLMemory *) gst_memory_copy (GST_MEMORY_CAST (smeta->memory), 0,
+          -1);
+    }
+  }
+  return TRUE;
+}
+
+GType
+gst_gl_meta_api_get_type (void)
+{
+  static volatile GType type;
+  static const gchar *tags[] = { "memory", NULL };      /* don't know what to set here */
+
+  if (g_once_init_enter (&type)) {
+    GType _type = gst_meta_api_type_register ("GstGLMetaAPI", tags);
+    g_once_init_leave (&type, _type);
+  }
+  return type;
+}
+
+const GstMetaInfo *
+gst_gl_meta_get_info (void)
+{
+  static const GstMetaInfo *gl_meta_info = NULL;
+
+  if (gl_meta_info == NULL) {
+    gl_meta_info =
+        gst_meta_register (GST_GL_META_API_TYPE, "GstGLMeta",
+        sizeof (GstGLMeta), (GstMetaInitFunction) gst_gl_meta_init,
+        (GstMetaFreeFunction) gst_gl_meta_free,
+        (GstMetaTransformFunction) gst_gl_meta_transform);
+  }
+  return gl_meta_info;
+}
+
+/**
+ * gst_buffer_add_gl_meta:
+ * @buffer: a #GstBuffer
+ * @display: the #GstGLDisplay to use
+ *
+ * Creates and adds a #GstGLMeta to a @buffer.
+ *
+ * Returns: (transfer full): a newly created #GstGLMeta
+ */
+GstGLMeta *
+gst_buffer_add_gl_meta (GstBuffer * buffer, GstGLDisplay * display)
+{
+  GstGLMeta *gl_meta;
+
+  gl_meta = (GstGLMeta *) gst_buffer_add_meta (buffer, GST_GL_META_INFO, NULL);
+
+  gl_meta->display = g_object_ref (display);
+
+  g_assert (gst_buffer_n_memory (buffer) == 1);
+
+  gl_meta->memory = (GstGLMemory *) gst_buffer_get_memory (buffer, 0);
+
+  return gl_meta;
+}

gst-libs/gst/gl/gstglmeta.h

@@ -0,0 +1,76 @@
+/* 
+ * GStreame
+ * Copyright (C) 2007 Matthew Waters <ystreet00@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _GST_GL_META_H_
+#define _GST_GL_META_H_
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include <gst/video/gstvideometa.h>
+
+#include "gstgldisplay.h"
+#include "gstglmemory.h"
+
+G_BEGIN_DECLS
+
+typedef struct _GstGLMeta GstGLMeta;
+
+GType gst_gl_meta_api_get_type (void);
+#define GST_GL_META_API_TYPE  (gst_gl_meta_api_get_type())
+#define GST_GL_META_INFO  (gst_gl_meta_get_info())
+const GstMetaInfo * gst_gl_meta_get_info (void);
+
+/**
+ * GstGLMeta:
+ * @meta: parent #GstMeta
+ * @buffer: #GstBuffer this meta belongs to
+ * @video_meta: the #GstVideoMeta associated with this meta
+ * @display: the #GstGLDisplay
+ * @texture_id: the GL texture associated with this meta
+ *
+ * Extra buffer metadata describing OpenGL objects
+ */
+struct _GstGLMeta {
+    GstMeta meta;
+    GstBuffer *buffer;
+
+    GstGLDisplay *display;
+
+    GstGLMemory *memory;
+};
+
+#ifndef OPENGL_ES2
+# define GST_GL_VIDEO_CAPS \
+    GST_VIDEO_CAPS_MAKE ("{ RGB, RGBx, RGBA, BGR, BGRx, BGRA, xRGB, xBGR, ARGB, ABGR, I420, YV12, YUY2, UYVY, AYUV }")
+#else /* OPENGL_ES2 */
+# define GST_GL_VIDEO_CAPS \
+    GST_VIDEO_CAPS_MAKE ("{ RGB, RGBx, RGBA, I420, YV12, YUY2, UYVY, AYUV }")
+#endif /* OPENGL_ES2 */
+
+#define gst_buffer_get_gl_meta(b) ((GstGLMeta*)gst_buffer_get_meta((b),GST_GL_META_API_TYPE))
+GstGLMeta * gst_buffer_add_gl_meta (GstBuffer * buffer, GstGLDisplay * display);
+
+gboolean gst_gl_meta_map (GstVideoMeta *meta, guint plane, GstMapInfo *info,
+                          gpointer *data, gint * stride, GstMapFlags flags);
+gboolean gst_gl_meta_unmap (GstVideoMeta *meta, guint plane, GstMapInfo *info);
+
+G_END_DECLS
+
+#endif /* _GST_GL_META_H_ */