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/* GStreamer
* Copyright (C) 2021 Collabora Ltd.
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.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 St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_VIDEO_CODEC_ALPHA_META_H__
#define __GST_VIDEO_CODEC_ALPHA_META_H__
#include <gst/gst.h>
#include <gst/video/video.h>
G_BEGIN_DECLS
/**
* GST_VIDEO_CODEC_ALPHA_META_API_TYPE:
*
* Since: 1.20
*/
#define GST_VIDEO_CODEC_ALPHA_META_API_TYPE (gst_video_codec_alpha_meta_api_get_type())
/**
* GST_VIDEO_CODEC_ALPHA_META_INFO:
*
* Since: 1.20
*/
#define GST_VIDEO_CODEC_ALPHA_META_INFO (gst_video_codec_alpha_meta_get_info())
typedef struct _GstVideoCodecAlphaMeta GstVideoCodecAlphaMeta;
/**
* GstVideoCodecAlphaMeta:
* @meta: parent #GstMeta
* @buffer: the encoded alpha frame
*
* Encapsulate an extra frame containing the encoded alpha channel for the
* currently negotiated CODEC. The streams must be of the same dimention as
* the original one.
*
* Since: 1.20
*/
struct _GstVideoCodecAlphaMeta
{
GstMeta meta;
GstBuffer *buffer;
};
GST_VIDEO_API
GType gst_video_codec_alpha_meta_api_get_type (void);
GST_VIDEO_API
const GstMetaInfo *gst_video_codec_alpha_meta_get_info (void);
/**
* gst_buffer_get_video_codec_alpha_meta:
* @b: A #GstBuffer pointer, must be writable.
*
* Helper macro to get #GstVideoCodecAlphaMeta from an existing #GstBuffer.
*
* Returns: (nullable): the #GstVideoCodecAlphaMeta pointer, or %NULL if none.
*
* Since: 1.20
*/
#define gst_buffer_get_video_codec_alpha_meta(b) \
((GstVideoCodecAlphaMeta *)gst_buffer_get_meta((b),GST_VIDEO_CODEC_ALPHA_META_API_TYPE))
GST_VIDEO_API
GstVideoCodecAlphaMeta *gst_buffer_add_video_codec_alpha_meta (GstBuffer * buffer,
GstBuffer * alpha_buffer);
G_END_DECLS
#endif /* __GST_VIDEO_CODEC_ALPHA_META_H__ */
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