mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 12:11:13 +00:00
d6c425fc58
Knowing the positioning and size of each frame in the composition can help applications optimize their rendering pipeline. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5652>
135 lines
4 KiB
C
135 lines
4 KiB
C
/* 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;
|
|
}
|