1 /* GStreamer 2 * Copyright (C) 2021 Collabora Ltd. 3 * Author: Nicolas Dufresne <nicolas.dufresne@collabora.com> 4 * 5 * This library is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU Library General Public 7 * License as published by the Free Software Foundation; either 8 * version 2 of the License, or (at your option) any later version. 9 * 10 * This library is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 * Library General Public License for more details. 14 * 15 * You should have received a copy of the GNU Library General Public 16 * License along with this library; if not, write to the 17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef __GST_VIDEO_CODEC_ALPHA_META_H__ 22 #define __GST_VIDEO_CODEC_ALPHA_META_H__ 23 24 #include <gst/gst.h> 25 #include <gst/video/video.h> 26 27 G_BEGIN_DECLS 28 29 /** 30 * GST_VIDEO_CODEC_ALPHA_META_API_TYPE: 31 * 32 * Since: 1.20 33 */ 34 #define GST_VIDEO_CODEC_ALPHA_META_API_TYPE (gst_video_codec_alpha_meta_api_get_type()) 35 36 /** 37 * GST_VIDEO_CODEC_ALPHA_META_INFO: 38 * 39 * Since: 1.20 40 */ 41 #define GST_VIDEO_CODEC_ALPHA_META_INFO (gst_video_codec_alpha_meta_get_info()) 42 43 typedef struct _GstVideoCodecAlphaMeta GstVideoCodecAlphaMeta; 44 45 /** 46 * GstVideoCodecAlphaMeta: 47 * @meta: parent #GstMeta 48 * @buffer: the encoded alpha frame 49 * 50 * Encapsulate an extra frame containing the encoded alpha channel for the 51 * currently negotiated CODEC. The streams must be of the same dimention as 52 * the original one. 53 * 54 * Since: 1.20 55 */ 56 struct _GstVideoCodecAlphaMeta 57 { 58 GstMeta meta; 59 60 GstBuffer *buffer; 61 }; 62 63 GST_VIDEO_API 64 GType gst_video_codec_alpha_meta_api_get_type (void); 65 66 GST_VIDEO_API 67 const GstMetaInfo *gst_video_codec_alpha_meta_get_info (void); 68 69 /** 70 * gst_buffer_get_video_codec_alpha_meta: 71 * @b: A #GstBuffer pointer, must be writable. 72 * 73 * Helper macro to get #GstVideoCodecAlphaMeta from an existing #GstBuffer. 74 * 75 * Returns: (nullable): the #GstVideoCodecAlphaMeta pointer, or %NULL if none. 76 * 77 * Since: 1.20 78 */ 79 #define gst_buffer_get_video_codec_alpha_meta(b) \ 80 ((GstVideoCodecAlphaMeta *)gst_buffer_get_meta((b),GST_VIDEO_CODEC_ALPHA_META_API_TYPE)) 81 82 GST_VIDEO_API 83 GstVideoCodecAlphaMeta *gst_buffer_add_video_codec_alpha_meta (GstBuffer * buffer, 84 GstBuffer * alpha_buffer); 85 86 G_END_DECLS 87 88 #endif /* __GST_VIDEO_CODEC_ALPHA_META_H__ */ 89