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88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
/* GStreamer
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* Copyright (C) 2021 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VIDEO_CODEC_ALPHA_META_H__
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#define __GST_VIDEO_CODEC_ALPHA_META_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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/**
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* GST_VIDEO_CODEC_ALPHA_META_API_TYPE:
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*
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* Since: 1.20
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*/
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#define GST_VIDEO_CODEC_ALPHA_META_API_TYPE (gst_video_codec_alpha_meta_api_get_type())
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/**
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* GST_VIDEO_CODEC_ALPHA_META_INFO:
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*
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* Since: 1.20
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*/
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#define GST_VIDEO_CODEC_ALPHA_META_INFO (gst_video_codec_alpha_meta_get_info())
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typedef struct _GstVideoCodecAlphaMeta GstVideoCodecAlphaMeta;
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/**
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* GstVideoCodecAlphaMeta:
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* @meta: parent #GstMeta
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* @buffer: the encoded alpha frame
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*
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* Encapsulate an extra frame containing the encoded alpha channel for the
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* currently negotiated CODEC. The streams must be of the same dimention as
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* the original one.
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*
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* Since: 1.20
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*/
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struct _GstVideoCodecAlphaMeta
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{
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GstMeta meta;
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GstBuffer *buffer;
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};
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GST_VIDEO_API
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GType gst_video_codec_alpha_meta_api_get_type (void);
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GST_VIDEO_API
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const GstMetaInfo *gst_video_codec_alpha_meta_get_info (void);
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/**
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* gst_buffer_get_video_codec_alpha_meta:
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* @b: A #GstBuffer pointer, must be writable.
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*
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* Helper macro to get #GstVideoCodecAlphaMeta from an existing #GstBuffer.
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*
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* Returns: (nullable): the #GstVideoCodecAlphaMeta pointer, or %NULL if none.
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*
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* Since: 1.20
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*/
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#define gst_buffer_get_video_codec_alpha_meta(b) \
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((GstVideoCodecAlphaMeta *)gst_buffer_get_meta((b),GST_VIDEO_CODEC_ALPHA_META_API_TYPE))
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GST_VIDEO_API
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GstVideoCodecAlphaMeta *gst_buffer_add_video_codec_alpha_meta (GstBuffer * buffer,
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GstBuffer * alpha_buffer);
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G_END_DECLS
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#endif /* __GST_VIDEO_CODEC_ALPHA_META_H__ */
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