allocators: Add GstDmabufMeta
This meta can be added to the allocation query to indicate support
for dmabuf memory. Optionally the drm_modifier can also be set in
the allocation query to indicate that the element supports some
certain set of drm modifiers (swizzling/tiling/compression/etc).
When the meta is attached to a buffer, the drm_modifier should
only be one which the src and sink both indicated support for in
the allocation query.
https://bugzilla.gnome.org/show_bug.cgi?id=779146
diff --git a/gst-libs/gst/allocators/Makefile.am b/gst-libs/gst/allocators/Makefile.am
index 1957d28..4f72b2e 100644
--- a/gst-libs/gst/allocators/Makefile.am
+++ b/gst-libs/gst/allocators/Makefile.am
@@ -7,14 +7,16 @@
allocators-prelude.h \
gstfdmemory.h \
gstphysmemory.h \
- gstdmabuf.h
+ gstdmabuf.h \
+ gstdmabufmeta.h
noinst_HEADERS =
libgstallocators_@GST_API_VERSION@_la_SOURCES = \
gstfdmemory.c \
gstphysmemory.c \
- gstdmabuf.c
+ gstdmabuf.c \
+ gstdmabufmeta.c
libgstallocators_@GST_API_VERSION@_la_LIBADD = $(GST_LIBS) $(LIBM)
libgstallocators_@GST_API_VERSION@_la_CFLAGS = $(GST_PLUGINS_BASE_CFLAGS) $(GST_CFLAGS)
diff --git a/gst-libs/gst/allocators/allocators.h b/gst-libs/gst/allocators/allocators.h
index b616aa2..14a49d4 100644
--- a/gst-libs/gst/allocators/allocators.h
+++ b/gst-libs/gst/allocators/allocators.h
@@ -27,6 +27,7 @@
#include <gst/allocators/gstdmabuf.h>
#include <gst/allocators/gstfdmemory.h>
#include <gst/allocators/gstphysmemory.h>
+#include <gst/allocators/gstdmabufmeta.h>
#endif /* __GST_ALLOCATORS_H__ */
diff --git a/gst-libs/gst/allocators/gstdmabufmeta.c b/gst-libs/gst/allocators/gstdmabufmeta.c
new file mode 100644
index 0000000..e881e2a
--- /dev/null
+++ b/gst-libs/gst/allocators/gstdmabufmeta.c
@@ -0,0 +1,161 @@
+/*
+ * GStreamer
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+/**
+ * SECTION:gstdmabufmeta
+ * @short_description: dmabuf metadata
+ * @see_also: #GstDmaBufAllocator
+ *
+ * #GstDmabufMeta carries metadata that goes along with
+ * dmabuf memory in the buffer, like drm modifier.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstdmabufmeta.h"
+
+/**
+ * gst_buffer_add_dmabuf_meta:
+ * @buffer: a #GstBuffer
+ * @modifier: the drm modifier
+ *
+ * Returns: (transfer none): the #GstDmabufMeta added to #GstBuffer
+ *
+ * Since: 1.12
+ */
+GstDmabufMeta *
+gst_buffer_add_dmabuf_meta (GstBuffer * buffer, guint64 drm_modifier)
+{
+ GstDmabufMeta *meta;
+
+ meta =
+ (GstDmabufMeta *) gst_buffer_add_meta ((buffer),
+ GST_DMABUF_META_INFO, NULL);
+
+ if (!meta)
+ return NULL;
+
+ meta->drm_modifier = drm_modifier;
+
+ return meta;
+}
+
+static gboolean
+gst_dmabuf_meta_transform (GstBuffer * dest, GstMeta * meta,
+ GstBuffer * buffer, GQuark type, gpointer data)
+{
+ GstDmabufMeta *dmeta, *smeta;
+
+ smeta = (GstDmabufMeta *) 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 = gst_buffer_add_dmabuf_meta (dest, smeta->drm_modifier);
+ if (!dmeta)
+ return FALSE;
+ }
+ } else {
+ /* return FALSE, if transform type is not supported */
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static void
+gst_dmabuf_meta_free (GstMeta * meta, GstBuffer * buffer)
+{
+ ((GstDmabufMeta *) meta)->drm_modifier = 0;
+
+ return;
+}
+
+static gboolean
+gst_dmabuf_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
+{
+ ((GstDmabufMeta *) meta)->drm_modifier = 0;
+
+ return TRUE;
+}
+
+GType
+gst_dmabuf_meta_api_get_type (void)
+{
+ static volatile GType type = 0;
+ static const gchar *tags[] = { NULL };
+
+ if (g_once_init_enter (&type)) {
+ GType _type = gst_meta_api_type_register ("GstDmabufMetaAPI", tags);
+ g_once_init_leave (&type, _type);
+ }
+
+ return type;
+}
+
+const GstMetaInfo *
+gst_dmabuf_meta_get_info (void)
+{
+ static const GstMetaInfo *meta_info = NULL;
+
+ if (g_once_init_enter (&meta_info)) {
+ const GstMetaInfo *meta = gst_meta_register (GST_DMABUF_META_API_TYPE,
+ "GstDmabufMeta",
+ sizeof (GstDmabufMeta), gst_dmabuf_meta_init,
+ gst_dmabuf_meta_free,
+ gst_dmabuf_meta_transform);
+ g_once_init_leave (&meta_info, meta);
+ }
+
+ return meta_info;
+}
+
+void
+gst_query_add_allocation_dmabuf_meta (GstQuery * query, guint64 drm_modifier)
+{
+ guint index;
+ GstStructure *params;
+
+ if (!gst_query_find_allocation_meta (query, GST_DMABUF_META_API_TYPE, &index)) {
+ gchar *str =
+ g_strdup_printf ("GstDmabufMeta, dmabuf.drm_modifier=(guint64){ %"
+ G_GUINT64_FORMAT " };", drm_modifier);
+
+ params = gst_structure_new_from_string (str);
+ g_free (str);
+
+ gst_query_add_allocation_meta (query, GST_DMABUF_META_API_TYPE, params);
+ gst_structure_free (params);
+ } else {
+ GValue newlist = G_VALUE_INIT, drm_modifier_value = G_VALUE_INIT;
+
+ gst_query_parse_nth_allocation_meta (query, index,
+ (const GstStructure **) ¶ms);
+ g_value_init (&drm_modifier_value, G_TYPE_UINT64);
+ g_value_set_uint64 (&drm_modifier_value, drm_modifier);
+ gst_value_list_merge (&newlist, gst_structure_get_value (params,
+ "dmabuf.drm_modifier"), &drm_modifier_value);
+ gst_structure_take_value (params, "dmabuf.drm_modifier", &newlist);
+ }
+}
diff --git a/gst-libs/gst/allocators/gstdmabufmeta.h b/gst-libs/gst/allocators/gstdmabufmeta.h
new file mode 100644
index 0000000..1af80fd
--- /dev/null
+++ b/gst-libs/gst/allocators/gstdmabufmeta.h
@@ -0,0 +1,60 @@
+/*
+ * GStreamer
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * 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., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __GST_DMABUF_META_H__
+#define __GST_DMABUF_META_H__
+
+#include <gst/gstmeta.h>
+#include <gst/gstquery.h>
+#include <gst/gstvalue.h>
+
+G_BEGIN_DECLS
+
+#define GST_DMABUF_META_API_TYPE (gst_dmabuf_meta_api_get_type())
+#define GST_DMABUF_META_INFO (gst_dmabuf_meta_get_info())
+typedef struct _GstDmabufMeta GstDmabufMeta;
+
+/**
+ * GstDmabufMeta:
+ * @parent: the parent #GstMeta
+ * @modifier: DRM modifier
+ */
+struct _GstDmabufMeta
+{
+ GstMeta parent;
+
+ guint64 drm_modifier;
+};
+
+GST_EXPORT
+GType gst_dmabuf_meta_api_get_type (void);
+GST_EXPORT
+const GstMetaInfo *gst_dmabuf_meta_get_info (void);
+
+#define gst_buffer_get_dmabuf_meta(b) ((GstDmabufMeta*)gst_buffer_get_meta((b),GST_DMABUF_META_API_TYPE))
+
+GST_EXPORT
+GstDmabufMeta * gst_buffer_add_dmabuf_meta (GstBuffer * buffer, guint64 drm_modifier);
+
+GST_EXPORT
+void gst_query_add_allocation_dmabuf_meta (GstQuery * query, guint64 drm_modifier);
+
+G_END_DECLS
+#endif /* __GST_DMABUF_META_H__ */
