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1 | /* |
2 | * Copyright (c) 2013 Vittorio Giovara <vittorio.giovara@gmail.com> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef AVUTIL_STEREO3D_H | |
22 | #define AVUTIL_STEREO3D_H | |
23 | ||
24 | #include <stdint.h> | |
25 | ||
26 | #include "frame.h" | |
27 | ||
28 | /** | |
29 | * List of possible 3D Types | |
30 | */ | |
31 | enum AVStereo3DType { | |
32 | /** | |
33 | * Video is not stereoscopic (and metadata has to be there). | |
34 | */ | |
35 | AV_STEREO3D_2D, | |
36 | ||
37 | /** | |
38 | * Views are next to each other. | |
39 | * | |
40 | * LLLLRRRR | |
41 | * LLLLRRRR | |
42 | * LLLLRRRR | |
43 | * ... | |
44 | */ | |
45 | AV_STEREO3D_SIDEBYSIDE, | |
46 | ||
47 | /** | |
48 | * Views are on top of each other. | |
49 | * | |
50 | * LLLLLLLL | |
51 | * LLLLLLLL | |
52 | * RRRRRRRR | |
53 | * RRRRRRRR | |
54 | */ | |
55 | AV_STEREO3D_TOPBOTTOM, | |
56 | ||
57 | /** | |
58 | * Views are alternated temporally. | |
59 | * | |
60 | * frame0 frame1 frame2 ... | |
61 | * LLLLLLLL RRRRRRRR LLLLLLLL | |
62 | * LLLLLLLL RRRRRRRR LLLLLLLL | |
63 | * LLLLLLLL RRRRRRRR LLLLLLLL | |
64 | * ... ... ... | |
65 | */ | |
66 | AV_STEREO3D_FRAMESEQUENCE, | |
67 | ||
68 | /** | |
69 | * Views are packed in a checkerboard-like structure per pixel. | |
70 | * | |
71 | * LRLRLRLR | |
72 | * RLRLRLRL | |
73 | * LRLRLRLR | |
74 | * ... | |
75 | */ | |
76 | AV_STEREO3D_CHECKERBOARD, | |
77 | ||
78 | /** | |
79 | * Views are next to each other, but when upscaling | |
80 | * apply a checkerboard pattern. | |
81 | * | |
82 | * LLLLRRRR L L L L R R R R | |
83 | * LLLLRRRR => L L L L R R R R | |
84 | * LLLLRRRR L L L L R R R R | |
85 | * LLLLRRRR L L L L R R R R | |
86 | */ | |
87 | AV_STEREO3D_SIDEBYSIDE_QUINCUNX, | |
88 | ||
89 | /** | |
90 | * Views are packed per line, as if interlaced. | |
91 | * | |
92 | * LLLLLLLL | |
93 | * RRRRRRRR | |
94 | * LLLLLLLL | |
95 | * ... | |
96 | */ | |
97 | AV_STEREO3D_LINES, | |
98 | ||
99 | /** | |
100 | * Views are packed per column. | |
101 | * | |
102 | * LRLRLRLR | |
103 | * LRLRLRLR | |
104 | * LRLRLRLR | |
105 | * ... | |
106 | */ | |
107 | AV_STEREO3D_COLUMNS, | |
108 | }; | |
109 | ||
110 | ||
111 | /** | |
112 | * Inverted views, Right/Bottom represents the left view. | |
113 | */ | |
114 | #define AV_STEREO3D_FLAG_INVERT (1 << 0) | |
115 | ||
116 | /** | |
117 | * Stereo 3D type: this structure describes how two videos are packed | |
118 | * within a single video surface, with additional information as needed. | |
119 | * | |
120 | * @note The struct must be allocated with av_stereo3d_alloc() and | |
121 | * its size is not a part of the public ABI. | |
122 | */ | |
123 | typedef struct AVStereo3D { | |
124 | /** | |
125 | * How views are packed within the video. | |
126 | */ | |
127 | enum AVStereo3DType type; | |
128 | ||
129 | /** | |
130 | * Additional information about the frame packing. | |
131 | */ | |
132 | int flags; | |
133 | } AVStereo3D; | |
134 | ||
135 | /** | |
136 | * Allocate an AVStereo3D structure and set its fields to default values. | |
137 | * The resulting struct can be freed using av_freep(). | |
138 | * | |
139 | * @return An AVStereo3D filled with default values or NULL on failure. | |
140 | */ | |
141 | AVStereo3D *av_stereo3d_alloc(void); | |
142 | ||
143 | /** | |
144 | * Allocate a complete AVFrameSideData and add it to the frame. | |
145 | * | |
146 | * @param frame The frame which side data is added to. | |
147 | * | |
148 | * @return The AVStereo3D structure to be filled by caller. | |
149 | */ | |
150 | AVStereo3D *av_stereo3d_create_side_data(AVFrame *frame); | |
151 | ||
152 | #endif /* AVUTIL_STEREO3D_H */ |