mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
640a65bf96
volatile is not sufficient to provide atomic guarantees and real atomics should be used instead. GCC 11 has started warning about using volatile with atomic operations. https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719 Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868 Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2098>
102 lines
3 KiB
C
102 lines
3 KiB
C
/* GStreamer
|
|
* Copyright (C) <2015> British Broadcasting Corporation
|
|
* Author: Chris Bass <dash@rd.bbc.co.uk>
|
|
*
|
|
* 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:gstsubtitlemeta
|
|
* @title: GstSubtitleMeta
|
|
* @short_description: Metadata class for timed-text subtitles.
|
|
*
|
|
* The GstSubtitleMeta class enables the layout and styling information needed
|
|
* to render subtitle text to be attached to a #GstBuffer containing that text.
|
|
*/
|
|
|
|
#include "subtitlemeta.h"
|
|
|
|
GType
|
|
gst_subtitle_meta_api_get_type (void)
|
|
{
|
|
static GType type;
|
|
static const gchar *tags[] = { "memory", NULL };
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
GType _type = gst_meta_api_type_register ("GstSubtitleMetaAPI", tags);
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
gboolean
|
|
gst_subtitle_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
|
|
{
|
|
GstSubtitleMeta *subtitle_meta = (GstSubtitleMeta *) meta;
|
|
|
|
subtitle_meta->regions = NULL;
|
|
return TRUE;
|
|
}
|
|
|
|
void
|
|
gst_subtitle_meta_free (GstMeta * meta, GstBuffer * buffer)
|
|
{
|
|
GstSubtitleMeta *subtitle_meta = (GstSubtitleMeta *) meta;
|
|
|
|
if (subtitle_meta->regions)
|
|
g_ptr_array_unref (subtitle_meta->regions);
|
|
}
|
|
|
|
const GstMetaInfo *
|
|
gst_subtitle_meta_get_info (void)
|
|
{
|
|
static const GstMetaInfo *subtitle_meta_info = NULL;
|
|
|
|
if (g_once_init_enter (&subtitle_meta_info)) {
|
|
const GstMetaInfo *meta =
|
|
gst_meta_register (GST_SUBTITLE_META_API_TYPE, "GstSubtitleMeta",
|
|
sizeof (GstSubtitleMeta), gst_subtitle_meta_init,
|
|
gst_subtitle_meta_free, (GstMetaTransformFunction) NULL);
|
|
g_once_init_leave (&subtitle_meta_info, meta);
|
|
}
|
|
return subtitle_meta_info;
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_add_subtitle_meta:
|
|
* @buffer: (transfer none): #GstBuffer holding subtitle text, to which
|
|
* subtitle metadata should be added.
|
|
* @regions: (transfer full): A #GPtrArray of #GstSubtitleRegions.
|
|
*
|
|
* Attaches subtitle metadata to a #GstBuffer.
|
|
*
|
|
* Returns: A pointer to the added #GstSubtitleMeta if successful; %NULL if
|
|
* unsuccessful.
|
|
*/
|
|
GstSubtitleMeta *
|
|
gst_buffer_add_subtitle_meta (GstBuffer * buffer, GPtrArray * regions)
|
|
{
|
|
GstSubtitleMeta *meta;
|
|
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
|
|
g_return_val_if_fail (regions != NULL, NULL);
|
|
|
|
meta = (GstSubtitleMeta *) gst_buffer_add_meta (buffer,
|
|
GST_SUBTITLE_META_INFO, NULL);
|
|
|
|
meta->regions = regions;
|
|
return meta;
|
|
}
|