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