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1 /* GStreamer
2  * Copyright (C) <2015> Jan Schmidt <jan@centricular.com>
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Library General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Library General Public License for more details.
13  *
14  * You should have received a copy of the GNU Library General Public
15  * License along with this library; if not, write to the
16  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
17  * Boston, MA 02110-1301, USA.
18  */
19 
20 #ifndef __GST_VIDEO_MULTIVIEW_H__
21 #define __GST_VIDEO_MULTIVIEW_H__
22 
23 #include <gst/gst.h>
24 #include <gst/video/video-prelude.h>
25 
26 G_BEGIN_DECLS
27 
28 /**
29  * GstVideoMultiviewFlagsSet:
30  *
31  * See #GstVideoMultiviewFlags.
32  */
33 #define GST_TYPE_VIDEO_MULTIVIEW_FLAGSET (gst_video_multiview_flagset_get_type())
34 GST_VIDEO_API
35 GType gst_video_multiview_flagset_get_type (void);
36 
37 GST_VIDEO_API
38 const gchar * gst_video_multiview_mode_to_caps_string (GstVideoMultiviewMode mview_mode);
39 
40 GST_VIDEO_API
41 GstVideoMultiviewMode gst_video_multiview_mode_from_caps_string (const gchar * caps_mview_mode);
42 
43 GST_VIDEO_API
44 const GValue *gst_video_multiview_get_mono_modes(void);
45 
46 GST_VIDEO_API
47 const GValue *gst_video_multiview_get_unpacked_modes(void);
48 
49 GST_VIDEO_API
50 const GValue *gst_video_multiview_get_doubled_height_modes(void);
51 
52 GST_VIDEO_API
53 const GValue *gst_video_multiview_get_doubled_width_modes(void);
54 
55 GST_VIDEO_API
56 const GValue *gst_video_multiview_get_doubled_size_modes(void);
57 
58 GST_VIDEO_API
59 void gst_video_multiview_video_info_change_mode (GstVideoInfo *info,
60     GstVideoMultiviewMode out_mview_mode, GstVideoMultiviewFlags out_mview_flags);
61 
62 GST_VIDEO_API
63 gboolean gst_video_multiview_guess_half_aspect (GstVideoMultiviewMode mv_mode,
64     guint width, guint height, guint par_n, guint par_d);
65 
66 
67 #if 0 /* Place-holder for later MVC support */
68 #define GST_VIDEO_MULTIVIEW_META_API_TYPE (gst_video_multiview_meta_api_get_type())
69 #define GST_VIDEO_MULTIVIEW_META_INFO  (gst_video_multiview_meta_get_info())
70 
71 typedef struct _GstVideoMultiviewMeta GstVideoMultiviewMeta;
72 typedef struct _GstVideoMultiviewViewInfo GstVideoMultiviewViewInfo;
73 
74 GType gst_video_multiview_meta_api_get_type (void);
75 const GstMetaInfo * gst_video_multiview_meta_get_info (void);
76 
77 GstVideoMultiviewMeta * gst_buffer_add_video_multiview_meta (GstBuffer *buffer, guint n_views);
78 #define gst_buffer_get_video_multiview_meta(b) ((GstVideoMultiviewMeta *)gst_buffer_get_meta((b),GST_VIDEO_MULTIVIEW_META_API_TYPE))
79 
80 void gst_video_multiview_meta_set_n_views (GstVideoMultiviewMeta *mview_meta, guint n_views);
81 
82 typedef enum {
83   GST_VIDEO_MULTIVIEW_VIEW_UNKNOWN = 0,
84   GST_VIDEO_MULTIVIEW_VIEW_MONO = 1,
85   GST_VIDEO_MULTIVIEW_VIEW_LEFT = 2,
86   GST_VIDEO_MULTIVIEW_VIEW_RIGHT = 3
87 } GstVideoMultiviewViewLabel;
88 
89 struct _GstVideoMultiviewViewInfo {
90   GstVideoMultiviewViewLabel view_label;
91 
92   guint meta_id; /* id of the GstVideoMeta for this view */
93 
94   /*< private >*/
95   gpointer _gst_reserved[GST_PADDING];
96 };
97 
98 struct _GstVideoMultiviewMeta {
99   GstMeta       meta;
100 
101   guint         n_views;
102   GstVideoMultiviewViewInfo *view_info;
103 };
104 #endif
105 
106 G_END_DECLS
107 
108 #endif
109