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/* GStreamer
* Copyright (C) 2013 Mathieu Duponchelle <mduponchelle1@gmail.com>
* Copyright (C) 2013 Thibault Saunier <thibault.saunier@collabora.com>
* Copyright (C) 2020 Thibault Saunier <tsaunier@igalia.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., 51 Franklin Street, Suite 500,
* Boston, MA 02110-1335, USA.
*/
/**
* SECTION: gesframecompositionmeta
* @title: GESFrameCompositionMeta interface
* @short_description: A Meta providing positioning information for a given
* video frame
*
* Since: 1.24
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-frame-composition-meta.h"
#include "gstframepositioner.h"
static gboolean ges_frame_composition_meta_init (GstMeta * meta,
gpointer params, GstBuffer * buffer);
static gboolean ges_frame_composition_meta_transform (GstBuffer * dest,
GstMeta * meta, GstBuffer * buffer, GQuark type, gpointer data);
GType
ges_frame_composition_meta_api_get_type (void)
{
static GType type;
static const gchar *tags[] = { "video", NULL };
if (g_once_init_enter (&type)) {
GType _type = gst_meta_api_type_register ("GstFrameCompositionApi", tags);
g_once_init_leave (&type, _type);
}
return type;
}
static const GstMetaInfo *
ges_frame_composition_meta_get_info (void)
{
static const GstMetaInfo *meta_info = NULL;
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
const GstMetaInfo *meta =
gst_meta_register (ges_frame_composition_meta_api_get_type (),
"GESFrameCompositionMeta",
sizeof (GESFrameCompositionMeta), ges_frame_composition_meta_init, NULL,
ges_frame_composition_meta_transform);
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) meta);
}
return meta_info;
}
static gboolean
ges_frame_composition_meta_init (GstMeta * meta, gpointer params,
GstBuffer * buffer)
{
int default_operator_value = 0;
GESFrameCompositionMeta *smeta;
smeta = (GESFrameCompositionMeta *) meta;
gst_compositor_operator_get_type_and_default_value (&default_operator_value);
smeta->alpha = 0.0;
smeta->posx = smeta->posy = smeta->height = smeta->width = 0;
smeta->zorder = 0;
smeta->operator = default_operator_value;
return TRUE;
}
static gboolean
ges_frame_composition_meta_transform (GstBuffer * dest, GstMeta * meta,
GstBuffer * buffer, GQuark type, gpointer data)
{
GESFrameCompositionMeta *dmeta, *smeta;
smeta = (GESFrameCompositionMeta *) meta;
if (GST_META_TRANSFORM_IS_COPY (type)) {
/* only copy if the complete data is copied as well */
dmeta =
(GESFrameCompositionMeta *) gst_buffer_add_meta (dest,
ges_frame_composition_meta_get_info (), NULL);
dmeta->alpha = smeta->alpha;
dmeta->posx = smeta->posx;
dmeta->posy = smeta->posy;
dmeta->width = smeta->width;
dmeta->height = smeta->height;
dmeta->zorder = smeta->zorder;
dmeta->operator = smeta->operator;
}
return TRUE;
}
/**
* ges_buffer_add_frame_composition_meta:
* @buffer: #GstBuffer to which protection metadata should be added.
*
* Attaches positioning metadata to a #GstBuffer.
*
* Returns: (transfer none): a pointer to the added #GESFrameCompositionMeta.
*
* Since: 1.24
*/
GESFrameCompositionMeta *
ges_buffer_add_frame_composition_meta (GstBuffer * buffer)
{
GESFrameCompositionMeta *meta;
meta =
(GESFrameCompositionMeta *) gst_buffer_add_meta (buffer,
ges_frame_composition_meta_get_info (), NULL);
return meta;
}
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