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148 lines
3.5 KiB
C
148 lines
3.5 KiB
C
/*
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* Copyright (c) 2013 Vittorio Giovara <vittorio.giovara@gmail.com>
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "frame.h"
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/**
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* List of possible 3D Types
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*/
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enum AVStereo3DType {
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/**
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* Video is not stereoscopic (and metadata has to be there).
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*/
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AV_STEREO3D_2D,
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/**
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* Views are next to each other.
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*
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* LLLLRRRR
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* LLLLRRRR
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* LLLLRRRR
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* ...
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*/
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AV_STEREO3D_SIDEBYSIDE,
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/**
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* Views are on top of each other.
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*
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* LLLLLLLL
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* LLLLLLLL
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* RRRRRRRR
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* RRRRRRRR
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*/
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AV_STEREO3D_TOPBOTTOM,
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/**
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* Views are alternated temporally.
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*
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* frame0 frame1 frame2 ...
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* LLLLLLLL RRRRRRRR LLLLLLLL
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* LLLLLLLL RRRRRRRR LLLLLLLL
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* LLLLLLLL RRRRRRRR LLLLLLLL
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* ... ... ...
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*/
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AV_STEREO3D_FRAMESEQUENCE,
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/**
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* Views are packed in a checkerboard-like structure per pixel.
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*
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* LRLRLRLR
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* RLRLRLRL
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* LRLRLRLR
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* ...
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*/
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AV_STEREO3D_CHECKERBOARD,
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/**
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* Views are next to each other, but when upscaling
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* apply a checkerboard pattern.
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*
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* LLLLRRRR L L L L R R R R
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* LLLLRRRR => L L L L R R R R
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* LLLLRRRR L L L L R R R R
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* LLLLRRRR L L L L R R R R
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*/
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AV_STEREO3D_SIDEBYSIDE_QUINCUNX,
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/**
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* Views are packed per line, as if interlaced.
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*
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* LLLLLLLL
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* RRRRRRRR
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* LLLLLLLL
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* ...
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*/
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AV_STEREO3D_LINES,
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/**
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* Views are packed per column.
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*
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* LRLRLRLR
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* LRLRLRLR
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* LRLRLRLR
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* ...
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*/
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AV_STEREO3D_COLUMNS,
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};
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/**
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* Inverted views, Right/Bottom represents the left view.
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*/
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#define AV_STEREO3D_FLAG_INVERT (1 << 0)
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/**
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* Stereo 3D type: this structure describes how two videos are packed
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* within a single video surface, with additional information as needed.
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*
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* @note The struct must be allocated with av_stereo3d_alloc() and
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* its size is not a part of the public ABI.
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*/
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typedef struct AVStereo3D {
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/**
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* How views are packed within the video.
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*/
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enum AVStereo3DType type;
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/**
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* Additional information about the frame packing.
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*/
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int flags;
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} AVStereo3D;
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/**
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* Allocate an AVStereo3D structure and set its fields to default values.
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* The resulting struct can be freed using av_freep().
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*
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* @return An AVStereo3D filled with default values or NULL on failure.
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*/
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AVStereo3D *av_stereo3d_alloc(void);
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/**
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* Allocate a complete AVFrameSideData and add it to the frame.
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*
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* @param frame The frame which side data is added to.
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*
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* @return The AVStereo3D structure to be filled by caller.
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*/
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AVStereo3D *av_stereo3d_create_side_data(AVFrame *frame);
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