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| | |
| | | /* |
| | | * Copyright (c) 2013 Vittorio Giovara <vittorio.giovara@gmail.com> |
| | | * |
| | | * This file is part of FFmpeg. |
| | | * |
| | | * FFmpeg is free software; you can redistribute it and/or |
| | | * modify it under the terms of the GNU Lesser General Public |
| | | * License as published by the Free Software Foundation; either |
| | | * version 2.1 of the License, or (at your option) any later version. |
| | | * |
| | | * FFmpeg is distributed in the hope that it will be useful, |
| | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| | | * Lesser General Public License for more details. |
| | | * |
| | | * You should have received a copy of the GNU Lesser General Public |
| | | * License along with FFmpeg; if not, write to the Free Software |
| | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| | | */ |
| | | |
| | | /** |
| | | * @file |
| | | * Stereoscopic video |
| | | */ |
| | | |
| | | #ifndef AVUTIL_STEREO3D_H |
| | | #define AVUTIL_STEREO3D_H |
| | | |
| | | #include <stdint.h> |
| | | |
| | | #include "frame.h" |
| | | |
| | | /** |
| | | * @addtogroup lavu_video |
| | | * @{ |
| | | * |
| | | * @defgroup lavu_video_stereo3d Stereo3D types and functions |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @addtogroup lavu_video_stereo3d |
| | | * A stereoscopic video file consists in multiple views embedded in a single |
| | | * frame, usually describing two views of a scene. This file describes all |
| | | * possible codec-independent view arrangements. |
| | | * */ |
| | | |
| | | /** |
| | | * List of possible 3D Types |
| | | */ |
| | | enum AVStereo3DType { |
| | | /** |
| | | * Video is not stereoscopic (and metadata has to be there). |
| | | */ |
| | | AV_STEREO3D_2D, |
| | | |
| | | /** |
| | | * Views are next to each other. |
| | | * |
| | | * @code{.unparsed} |
| | | * LLLLRRRR |
| | | * LLLLRRRR |
| | | * LLLLRRRR |
| | | * ... |
| | | * @endcode |
| | | */ |
| | | AV_STEREO3D_SIDEBYSIDE, |
| | | |
| | | /** |
| | | * Views are on top of each other. |
| | | * |
| | | * @code{.unparsed} |
| | | * LLLLLLLL |
| | | * LLLLLLLL |
| | | * RRRRRRRR |
| | | * RRRRRRRR |
| | | * @endcode |
| | | */ |
| | | AV_STEREO3D_TOPBOTTOM, |
| | | |
| | | /** |
| | | * Views are alternated temporally. |
| | | * |
| | | * @code{.unparsed} |
| | | * frame0 frame1 frame2 ... |
| | | * LLLLLLLL RRRRRRRR LLLLLLLL |
| | | * LLLLLLLL RRRRRRRR LLLLLLLL |
| | | * LLLLLLLL RRRRRRRR LLLLLLLL |
| | | * ... ... ... |
| | | * @endcode |
| | | */ |
| | | AV_STEREO3D_FRAMESEQUENCE, |
| | | |
| | | /** |
| | | * Views are packed in a checkerboard-like structure per pixel. |
| | | * |
| | | * @code{.unparsed} |
| | | * LRLRLRLR |
| | | * RLRLRLRL |
| | | * LRLRLRLR |
| | | * ... |
| | | * @endcode |
| | | */ |
| | | AV_STEREO3D_CHECKERBOARD, |
| | | |
| | | /** |
| | | * Views are next to each other, but when upscaling |
| | | * apply a checkerboard pattern. |
| | | * |
| | | * @code{.unparsed} |
| | | * LLLLRRRR L L L L R R R R |
| | | * LLLLRRRR => L L L L R R R R |
| | | * LLLLRRRR L L L L R R R R |
| | | * LLLLRRRR L L L L R R R R |
| | | * @endcode |
| | | */ |
| | | AV_STEREO3D_SIDEBYSIDE_QUINCUNX, |
| | | |
| | | /** |
| | | * Views are packed per line, as if interlaced. |
| | | * |
| | | * @code{.unparsed} |
| | | * LLLLLLLL |
| | | * RRRRRRRR |
| | | * LLLLLLLL |
| | | * ... |
| | | * @endcode |
| | | */ |
| | | AV_STEREO3D_LINES, |
| | | |
| | | /** |
| | | * Views are packed per column. |
| | | * |
| | | * @code{.unparsed} |
| | | * LRLRLRLR |
| | | * LRLRLRLR |
| | | * LRLRLRLR |
| | | * ... |
| | | * @endcode |
| | | */ |
| | | AV_STEREO3D_COLUMNS, |
| | | }; |
| | | |
| | | /** |
| | | * List of possible view types. |
| | | */ |
| | | enum AVStereo3DView { |
| | | /** |
| | | * Frame contains two packed views. |
| | | */ |
| | | AV_STEREO3D_VIEW_PACKED, |
| | | |
| | | /** |
| | | * Frame contains only the left view. |
| | | */ |
| | | AV_STEREO3D_VIEW_LEFT, |
| | | |
| | | /** |
| | | * Frame contains only the right view. |
| | | */ |
| | | AV_STEREO3D_VIEW_RIGHT, |
| | | }; |
| | | |
| | | /** |
| | | * Inverted views, Right/Bottom represents the left view. |
| | | */ |
| | | #define AV_STEREO3D_FLAG_INVERT (1 << 0) |
| | | |
| | | /** |
| | | * Stereo 3D type: this structure describes how two videos are packed |
| | | * within a single video surface, with additional information as needed. |
| | | * |
| | | * @note The struct must be allocated with av_stereo3d_alloc() and |
| | | * its size is not a part of the public ABI. |
| | | */ |
| | | typedef struct AVStereo3D { |
| | | /** |
| | | * How views are packed within the video. |
| | | */ |
| | | enum AVStereo3DType type; |
| | | |
| | | /** |
| | | * Additional information about the frame packing. |
| | | */ |
| | | int flags; |
| | | |
| | | /** |
| | | * Determines which views are packed. |
| | | */ |
| | | enum AVStereo3DView view; |
| | | } AVStereo3D; |
| | | |
| | | /** |
| | | * Allocate an AVStereo3D structure and set its fields to default values. |
| | | * The resulting struct can be freed using av_freep(). |
| | | * |
| | | * @return An AVStereo3D filled with default values or NULL on failure. |
| | | */ |
| | | AVStereo3D *av_stereo3d_alloc(void); |
| | | |
| | | /** |
| | | * Allocate a complete AVFrameSideData and add it to the frame. |
| | | * |
| | | * @param frame The frame which side data is added to. |
| | | * |
| | | * @return The AVStereo3D structure to be filled by caller. |
| | | */ |
| | | AVStereo3D *av_stereo3d_create_side_data(AVFrame *frame); |
| | | |
| | | /** |
| | | * Provide a human-readable name of a given stereo3d type. |
| | | * |
| | | * @param type The input stereo3d type value. |
| | | * |
| | | * @return The name of the stereo3d value, or "unknown". |
| | | */ |
| | | const char *av_stereo3d_type_name(unsigned int type); |
| | | |
| | | /** |
| | | * Get the AVStereo3DType form a human-readable name. |
| | | * |
| | | * @param name The input string. |
| | | * |
| | | * @return The AVStereo3DType value, or -1 if not found. |
| | | */ |
| | | int av_stereo3d_from_name(const char *name); |
| | | |
| | | /** |
| | | * @} |
| | | * @} |
| | | */ |
| | | |
| | | #endif /* AVUTIL_STEREO3D_H */ |